JP6444830B2 - Tractor - Google Patents

Description

  The present invention relates to a tractor. In detail, it is related with the structure of the steering column of a tractor.

  Conventionally, a tractor equipped with a steering column having a tilt mechanism and a telescopic mechanism is known. Patent document 1 discloses this kind of tractor. The tractor disclosed in Patent Document 1 can be tilted and telescopically adjusted with a simple operation, and has a configuration in which the tractor side bracket can be fixed to the column side bracket with a high holding force with a simple configuration.

Japanese Patent Laying-Open No. 2015-6843

  The configuration of Patent Document 1 can easily and appropriately adjust the arrangement of the steering column within a certain range according to the physique of the operator. However, Patent Document 1 does not consider a case where the physique is greatly different beyond the adjustable range of the telescopic mechanism or the like (for example, country-specific specifications). Therefore, if the specifications of the tractor are different, there is room for improvement in that a steering column for each specification must be manufactured even if the same model is used.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the manufacturing cost by sharing the steering column and parts around the steering column even when the height specification for arranging the steering column is different. There is.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, a tractor having the following configuration is provided. That is, the tractor includes a steering column, a bracket, and a support member. The bracket supports the steering column. A plurality of mounting holes are formed in the support member. The bracket and the support member are fixed by a fixture that is attached to the attachment hole. The support member includes one set of the mounting holes and at least one other set of mounting holes in which the positions in the left-right direction and the front-back direction are the same and the positions in the vertical direction are different with respect to the one set of mounting holes. And are formed. The fixture is attached to one of the plurality of sets of the mounting holes.

  Thereby, the height at which the steering column is disposed can be changed while using a common support member. As a result, it is possible to share parts for tractors with different specifications and to reduce costs.

  The tractor preferably has the following configuration. That is, by bending at least one portion of the support member, a bent portion is formed in a part of the support member. The bent portion is disposed below the support member. In the bent portion, the attachment hole to which the second fixing tool can be attached is formed. An attachment member is attached to the bent portion. The attachment member is formed with a parallel portion arranged in parallel with the bent portion. An attachment hole to which the second fixing tool can be attached is formed in the parallel portion. The position of the mounting hole of the parallel part is the same as the mounting hole of the bent part in the front-rear direction and the left-right direction.

  Thereby, in the specification which fixes a bracket to a support member in a relatively low position, a bracket can be attached to the attachment hole of the bending part formed in the support member via the 2nd fixing tool. On the other hand, in the specification in which the bracket is fixed to the support member at a relatively high position, the spacer is fixed to the bent portion of the support member, and the bracket is attached to the mounting hole of the parallel portion of the spacer via the second fixing tool. be able to. Thus, by switching the presence / absence of the attachment member, a plurality of specifications with different steering column heights can be easily realized.

  The tractor preferably has the following configuration. That is, the bent portion is plate-shaped and its thickness is directed in the vertical direction. The attachment member includes the parallel part, a fixed part fixed to the bent part, and a connection part connecting the parallel part and the fixed part.

  Thereby, the specification that the steering column can be mounted at a relatively high position can be realized by a mounting member having a simple configuration.

  In the tractor, the bracket is preferably fixed to the support member in the vicinity of the upper end and the lower end of the bracket.

  As a result, the stability of the steering column when attached to the support member can be improved.

  In the tractor, it is preferable that at least one of the mounting holes is formed in the vicinity of the upper end of the support member.

  Thereby, the range which can change the attachment height with respect to the supporting member of a bracket can be ensured large, realizing the downsizing of the supporting member in the vertical direction.

The left view which shows the whole structure of the tractor which concerns on one Embodiment of this invention. The perspective view which shows the structure of a tractor. The perspective view which shows a mode that a mission case, a steering column, and a dashboard are arrange | positioned in a cabin. The left view which shows a part inside cabin. The perspective view which shows the periphery structure of a mission case, a steering column, and a dashboard. The left view which shows the periphery structure of a mission case, a steering handle, and a dashboard. The left view which shows the structure of the periphery of a steering column and a bracket. The perspective view which shows the periphery structure of a steering column and a bracket. The left view of a bracket. The perspective view of a bracket. The perspective view which shows arrangement | positioning of the vibration proof rubber with respect to a bracket. The perspective view which shows the mode of a support member and a bracket in the tractor of a specification with a low position of a steering column. The perspective view which shows the mode of a supporting member and a bracket in the tractor of a specification with a high position of a steering column. The disassembled perspective view which shows the attachment structure of a dashboard. The perspective view which shows a mode that a support member is attached to a fuel tank cover. The perspective view which shows the structure of a dashboard. The perspective view which shows a mode that a dashboard is attached to the fuel tank cover via the supporting member. The perspective view which shows the tractor of another specification by which a dashboard is directly attached to the fuel tank cover.

  Next, embodiments of the present invention will be described with reference to the drawings. First, the configuration of the tractor 100 according to an embodiment of the present invention will be briefly described. FIG. 1 is a left side view showing the overall configuration of the tractor 100. In the following description, “left”, “right”, and the like mean left and right in the direction in which the tractor 100 moves forward.

  A tractor 100 as a work vehicle for farm work shown in FIG. 1 is configured to be able to perform various types of work by attaching various work devices such as plows and loaders as necessary.

  As shown in FIG. 1, the tractor 100 includes an airframe (vehicle body) 2, a pair of left and right front wheels 3, and a pair of left and right rear wheels 4. The front wheel 3 supports the front part of the body 2, and the rear wheel 4 supports the rear part of the body 2.

  A bonnet 9 is disposed at the front of the body 2 of the tractor 100, and the bonnet 9 is configured to be openable and closable so that the inside can be exposed. The bonnet 9 is formed in a streamline shape, and its front part is formed so as to become narrower in both the vertical direction and the horizontal direction as it approaches the front. With this shape, a reduction in air resistance during travel and an improvement in design are realized.

  A part of the fuel tank 19 and the engine 5 are accommodated in the bonnet 9. A fan shroud 110, a radiator 111, a condenser 112, an engine control unit (ECU) 113, an air cleaner 114, and a battery 115 are disposed in front of the engine 5. The fan shroud 110, the condenser 112, the engine control unit (ECU) 113, the air cleaner 114, and the battery 115 are arranged in the above order from the rear to the front on the upper side of a mounting plate (not shown) fixed to the engine frame 16. These are housed in the bonnet 9.

  The fuel tank 19 is disposed at the upper part of the engine 5. The fuel tank 19 has an oil filling port 19a in the upper part, from which oil is poured. As shown in FIG. 1, the oil filling port 19 a is disposed so as to protrude from a hole provided in the upper part of the bonnet 9, so that the operator can perform the oiling work regardless of the open / closed state of the bonnet 9. It is possible.

  As shown in FIG. 1, the front portion 19 b of the fuel tank 19 is disposed above the engine 5 in the internal space of the bonnet 9. The rear portion 19 c of the fuel tank 19 is covered with a fuel tank cover 30 and is disposed inside a dashboard 50 provided in the cabin 6.

  The engine 5 is configured as a common rail type diesel engine having a plurality of cylinders. Specifically, the engine 5 includes an unillustrated common rail that stores the fuel supplied from the fuel tank 19 at a high pressure. The fuel supplied from the common rail is injected into a combustion chamber in the cylinder by an injector (not shown) arranged for each cylinder.

  The fan shroud 110 is configured to cover the outer periphery of the cooling fan driven by the engine 5, and is disposed in front of the engine 5. On the upper right side of the fan shroud 110, a notch (not shown) for passing a member such as the intake pipe 116 of the engine 5 is provided. The fan shroud 110 is configured to divide the inner section of the bonnet 9 in the front-rear direction. Therefore, heat from the engine 5 can be shielded against devices (such as the radiator 111 and the condenser 112) arranged in front of the fan shroud 110.

  The radiator 111 is a device that cools the cooling water in the water jacket of the engine 5, and is attached to the front side of the radiator 111. Between the radiator 111 and a not-shown water jacket formed in the engine 5, a not-shown circulation path for circulating the cooling water is formed. The cooling water in the water jacket that has become hot due to the heat generated by the engine 5 is sent to the radiator 111. The cooling water is cooled by outside air taken in from a front grill (not shown) when passing through the radiator 111, and then returns to the water jacket again to cool the engine 5.

  The condenser 112 is configured as a heat exchanger, and is configured with a tube through which a high-pressure liquid refrigerant used for an air conditioner that performs air conditioning in the cabin 6 passes, and a corrugated type or a plate type around the tube. And fins as main components. The capacitor 112 is supported by a capacitor frame (not shown) and is attached to the front side of the radiator 111.

  The ECU 113 is configured as a small computer. The ECU 113 controls the operation of the engine 5 by issuing a control command for controlling the fuel injection amount, the fuel injection timing, and the like based on information from various sensors attached to the engine 5.

  The air cleaner 114 has a configuration in which an air cleaner element for removing foreign substances in the air is housed inside. The air cleaner 114 is connected to the engine 5 by an intake pipe 116 and constitutes a part of the intake structure of the engine 5.

  The battery 115 supplies electric power to various electric components included in the tractor 100 (for example, a cell motor included in the engine 5, a headlight of the tractor 100, an ECU 113, and the like).

  As shown in FIG. 1, a cabin 6 for installation by an operator is installed at the rear of the machine body 2. Inside the cabin 6 are provided a steering handle 7 for the operator to steer, a driver seat 8 for the operator to sit on, and various operation devices for performing various operations.

  Examples of the operation device include an operation panel 10 disposed in front of the steering handle 7. The operation panel 10 is fixed to a dashboard 50 disposed in front of the steering handle 7. On the operation panel 10, instruments such as a speedometer, a fuel meter, and a distance meter (not shown) that indicate information necessary for traveling the tractor 100 are disposed.

  The body frame constituting the skeleton of the body 2 includes an engine frame 16 and a mission case 18. A front axle case 17 is attached to the lower side of the engine frame 16. A front wheel 3 is attached to the front axle case 17 via a front axle 130. The rear wheel 4 is attached to the transmission case 18 via the rear axle 14. Upper portions of the left and right rear wheels 4 are covered with left and right rear fenders 121.

  As shown in FIG. 6, the engine frame 16 and the transmission case 18 are each formed in an elongated shape, and both are arranged so that the longitudinal direction thereof is the front-rear direction. The mission case 18 is fixed to the rear end of the engine frame 16 via an appropriate fixing member. As described above, the engine frame 16 is supported by the front wheel 3 via the front axle case 17 and the front axle 130, and the transmission case 18 is supported by the rear wheel 4 via the rear axle 14. As described above, the front wheel 3 and the rear wheel 4 support the body frame composed of the engine frame 16 and the transmission case 18.

  The transmission case 18 decelerates the power from the engine 5 and transmits it to the front axle case 17 and the rear axle 14. When the operator operates a speed change operation tool (not shown), the speed ratio in the transmission case 18 can be changed and the traveling speed of the tractor 100 can be adjusted.

  As shown in FIG. 2, a PTO shaft 118 is disposed so as to protrude from the rear end of the mission case 18, and the driving force of the engine 5 is transmitted to the PTO shaft 118. The tractor 100 is configured such that the above-described working device can be attached to the rear end thereof. The PTO shaft 118 can drive the working device via a universal joint (not shown).

  The tractor 100 configured as described above can perform various operations such as tilling, sowing, and harvesting while traveling in the rice field.

  Next, with reference to FIG. 2 etc., the arrangement structure of the dashboard 50 of this embodiment and the steering column arrange | positioned in the back is demonstrated easily. FIG. 2 is a perspective view showing the configuration of the tractor 100.

  As shown in FIG. 2, the dashboard 50 according to the present embodiment is attached to the rear center of the hood 9 and at the center of the front side inside the cabin 6. The dashboard 50 is attached to cover the fuel tank cover 30 that covers the rear portion 19c of the fuel tank 19 (details will be described later).

  A cover (steering column cover 123) that covers the steering column 11 is installed behind the dashboard 50. A steering handle 7 is disposed above the steering column cover 123 and obliquely above and behind the dashboard 50.

  The rear part of the dashboard 50 is formed in a shape surrounding the front side of the steering column cover 123 disposed at the center of the left and right. The steering column cover 123 is arranged so that the front part thereof is partially embedded in the rear part of the dashboard 50. As a result, it is possible to reduce the size of the operation unit including the steering wheel 7 attached to the dashboard 50 and the upper portion of the steering column cover 123, and to ensure a wide space for the operator.

  As shown in FIGS. 3 and 4, the cabin 6 includes a skeleton-like cabin frame 122. The cabin frame 122 is fixed to the mission case 18 included in the tractor 100. The steering column 11 is supported and fixed by a cabin frame 122.

  Specifically, as shown in FIG. 5, the cabin frame 122 is fixed to the left and right side surfaces of the mission case 18 via a pair of left and right frame fixing members 132 (however, in FIG. Only member 132 is shown). The frame fixing member 132 is formed in a substantially L shape, and includes a plate-like mission case attachment portion 132a and a plate-like frame attachment portion 132b. The mission case mounting portion 132a is arranged with its thickness direction facing the left-right direction of the body, and is attached to the side surface of the mission case 18 via bolts or the like. On the other hand, the frame attachment portion 132b is disposed with its thickness direction directed in the vertical direction, and is attached to the bottom surface of the bottom plate member 122a so as to support the bottom plate member 122a constituting the cabin frame 122. Thus, the cabin frame 122 is fixed to the mission case 18 and supported by the rear wheel 4 via the mission case 18.

  The steering column 11 is fixed to the bracket 20 shown in FIG. 5 (in order to show the steering column 11 in an easy-to-understand manner, the steering column cover 123 is transparently shown by a chain line in FIG. 5). A frame plate member 134 is fixed to the cabin frame 122 by bolts or the like, and the bracket 20 is fixed to the frame plate member 134 via a support member 41. As described above, the steering column 11 is supported and fixed to the cabin frame 122 via the support member 41 and the like.

  As shown in FIG. 6, the dashboard 50 of the present embodiment can be applied to tractors having a plurality of specifications different from each other by switching the presence or absence of a dashboard support member 40 described later. The steering column 11 and the steering column cover 123 can also be applied to tractors having a plurality of specifications different from each other by appropriately changing the mounting positions thereof.

  Next, with reference to FIG.7 and FIG.8, the structure of the steering column 11 and the bracket 20 arrange | positioned in the dashboard 50 is demonstrated. FIG. 7 is a left side view showing a configuration around the steering column 11 and the bracket 20. FIG. 8 is a perspective view showing a configuration around the steering column 11 and the bracket 20. 7 and 8 show a state in which the dashboard 50 is removed.

  An elongated cylindrical steering column 11 is arranged inside the dashboard 50. The steering column 11 is disposed below the steering handle 7 so as to coincide with the rotation axis of the steering handle 7. A lower end portion of the steering column 11 is supported by the bracket 20.

  The steering column 11 is formed in a hollow shape, and a rod-shaped steering shaft (not shown) is disposed inside the steering column 11. A steering handle 7 is attached to the upper part of the steering shaft. A lower portion of the steering shaft is inserted into the steering column 11 and is supported rotatably with respect to the steering column 11. A reverser lever 12 for operating a not-shown forward / reverse switching mechanism provided in the tractor 100 is attached to the upper portion of the steering column 11. The steering column 11 is provided with a known telescopic device 13 for adjusting the position of the steering handle 7 in the longitudinal direction of the steering column 11.

  The steering handle 7 has a round handle shape and is configured to be rotatable in both left and right directions. The rotation of the steering handle 7 is input to a steering valve unit provided in a power steering device (not shown) via the steering shaft. The steering valve unit switches the supply of hydraulic oil to the cylinder of the power steering device. Thus, the cylinder is driven to change the direction of the front wheel 3 according to the direction and angle in which the steering handle 7 is rotated, and the traveling direction of the tractor 100 can be changed.

  The reverser lever 12 is disposed on the upper left side of the steering column 11. The reverser lever 12 is mounted so as to protrude to the left from the steering column 11, and is configured to be rotatable about an axis directed substantially in the vertical direction. The tractor 100 includes a reverser switch (not shown) for detecting the operation of the reverser lever 12. With this configuration, when the operator operates the reverser lever 12 forward or backward, the forward / backward switching mechanism (not shown) provided in the tractor 100 is controlled, and the traveling direction of the tractor 100 can be switched forward or backward. Yes.

  The bracket 20 supports the steering column 11 with respect to a support member 41 fixed to the engine frame 16 of the tractor 100. As shown in FIGS. 7 and 8, the bracket 20 includes a base member 21 and a movable member 22.

  The base member 21 is attached to the support member 41 via a plurality of (four in this embodiment) vibration-proof rubbers 42.

  The movable member 22 is attached to the upper part of the base member 21 via a shaft member 26 arranged in a pair on the left and right. The movable member 22 is supported so as to be rotatable about the axis of the shaft member 26 (the rotation shaft 27 arranged in the horizontal direction). The rotating shaft 27 corresponds to the tilt axis of the tilt mechanism provided in the bracket 20. A lower end portion of the steering column 11 is fixed to the upper portion of the movable member 22. With this configuration, by rotating the movable member 22, the steering column 11 and the steering handle 7 can be tilted backward or raised forward (tilt function). By using the tilt mechanism provided in the bracket 20 and the handle height adjusting mechanism by the telescopic device 13, the position of the steering handle 7 can be appropriately adjusted according to the physique of the operator.

  Next, a detailed configuration of the bracket 20 will be described with reference to FIGS. 9 and 10. FIG. 9 is a left side view of the bracket 20. FIG. 10 is a perspective view of the bracket 20.

  As shown in FIGS. 9 and 10, the base member 21 included in the bracket 20 is configured as a plate-like member that is bent at a plurality of locations so as to have a portal shape when viewed from the front. The base member 21 is integrally provided with a front attachment portion 21a, a pair of left and right shaft support portions 21b, and a pair of left and right lower attachment portions 21c.

  The front mounting portion 21a is formed in a plate shape whose thickness is directed in the front-rear direction. The upper portion of the front attachment portion 21a is attached to the support member 41 via a pair of left and right vibration isolation rubbers 42.

  Each of the pair of shaft support portions 21b is formed in a plate shape whose thickness is directed in the left-right direction. Each shaft support portion 21b extends rearward from both left and right end portions of the front mounting portion 21a and is then arranged to extend downward. The shaft support portion 21b is connected to the front mounting portion 21a so as to be vertical in a plan view. The pair of shaft support portions 21b are arranged in parallel to each other, and an appropriate space for arranging the movable member 22 is formed between them. A shaft member 26 for supporting the movable member 22 is attached to each of the shaft support portions 21b.

  Each of the pair of lower mounting portions 21c is formed in a plate shape whose thickness is directed in the vertical direction. Each lower attachment portion 21c is disposed so as to protrude from the lower end of the pair of shaft support portions 21b to the left and right sides. The lower attachment portion 21c is connected to the shaft support portion 21b so as to be vertical in a front view. The left and right pair of lower attachment portions 21c are attached to the support member 41 via vibration-proof rubbers 42, respectively.

  Similar to the base member 21, the movable member 22 is configured as a plate-like member bent at a plurality of locations. The base member 21 is integrally provided with a column mounting portion 22a, a pair of left and right arm portions 22b, and a spring stopper 22c.

  The column attachment portion 22 a is formed in a plate shape whose thickness is perpendicular to the rotation shaft 27 of the movable member 22. The column mounting portion 22a is formed in a rectangular shape, and the lower end portion of the steering column 11 is fixed to the center position by an appropriate method.

  Each of the pair of arm portions 22b is formed in a plate shape whose thickness is directed in the left-right direction. Each arm part 22b is arrange | positioned so that it may extend toward the rotating shaft 27 of the movable member 22 (downward) from the left-right direction both ends of the column attachment part 22a. The pair of arm portions 22b are arranged in parallel with each other, and the steering valve unit (not shown) is arranged between them. Each arm portion 22b is rotatably supported with respect to the shaft support portion 21b of the base member 21 via the shaft member 26. A stopper member 29 is attached to one arm portion 22b (in this embodiment, the right arm portion 22b). The stopper member is configured to pass through an arc-shaped elongated hole 23 formed in a penetrating manner in the shaft support portion 21b of the base member 21 and protrude to the left and right outer sides (right side). By the stopper member 29 and the long hole 23, the angular stroke in which the movable member 22 rotates is limited to a predetermined range.

  The spring stopper 22c is formed in a plate shape that is arranged in a direction perpendicular to both the column attachment portion 22a and the arm portion 22b. The spring stopper 22c is disposed so as to extend downward from the front end of the column attachment portion 22a.

  As shown in FIG. 10, the angle of the movable member 22 with respect to the base member 21 (and thus the angles of the steering column 11 and the steering handle 7) is set to a desired angle on one side of the bracket 20 (left side in the present embodiment). A lock mechanism 49 is attached for holding. The lock mechanism 49 includes a first lock member 51, a second lock member 52, and a lock release lever 53.

  The first lock member 51 is formed in an elongated plate shape, and is fixed to the inner surface of the arm portion 22b on the left and right sides (the left side in the present embodiment) of the movable member 22. Accordingly, the first lock member 51 rotates integrally with the movable member 22 around the rotation shaft 27. An arcuate gear 54 is formed at the lower end of the first lock member 51.

  The second lock member 52 is formed in an elongated plate shape, and is disposed in the vicinity of the inner surface of the shaft support portion 21b on the left and right sides (the left side in the present embodiment) of the base member 21. One end (front end) of the second lock member 52 is rotatably supported via a support shaft 56 attached to the shaft support portion 21b. At the other end (rear end) of the second lock member 52, a square cam hole 58 that accommodates the cam plate 57 connected to the unlocking lever 53 is formed. Further, gear teeth 55 that can mesh with the arcuate gear 54 of the first lock member 51 are formed at the upper edge of the middle portion in the longitudinal direction of the second lock member 52. Further, a round bar-shaped regulating shaft 59 is fixed to the second lock member 52, and one end of a coil spring-like spring 68 is attached to the regulating shaft 59. The spring 68 is configured as a tension spring, and exerts a spring force in a direction in which the second lock member 52 is brought close to the first lock member 51 (a direction in which the gear teeth 55 and the gear 54 are meshed, specifically upward). Let The restriction shaft 59 protrudes so as to pass through a long hole 67 formed in a penetrating manner in the left shaft support portion 21 b, and the movement stroke of the second lock member 52 is caused by the restriction shaft 59 and the long hole 67. Is limited to a predetermined range.

  The unlocking lever 53 is rotatably attached to the left shaft support portion 21b included in the base member 21. The unlocking lever 53 is connected to the triangular cam plate 57 that is rotatably supported inside the left shaft support portion 21b. Therefore, the cam plate 57 can be rotated by the operator pulling up the unlock lever 53. Further, a torsion coil spring-like return spring 69 is attached to the cam plate 57, and this return spring 69 applies a spring force in a direction against the operation of pulling up the lock release lever 53.

  With the above configuration, normally, the gear teeth 55 of the second lock member 52 urged upward by the spring 68 are engaged with the gear 54 of the first lock member 51, so that the rotation of the movable member 22 is prevented. Blocked (locked state). On the other hand, when the operator pulls up the unlocking lever 53, the cam plate 57 rotates, and the cam plate 57 pushes down the second lock member 52 through the cam hole 58, so that the gear teeth 55 and the gear 54 are meshed. Is released and the movable member 22 can be rotated (unlocked state).

  A pair of left and right tension springs (elastic members) 28 are provided between the front mounting portion 21 a of the base member 21 and the spring stopper 22 c of the movable member 22. The tension spring 28 is movable in the direction in which the movable member 22 is rotated in the clockwise direction in FIG. 7 (in other words, in the direction in which the movable member 22 resists gravity and falls in the counterclockwise direction in FIG. 7). A force is applied to the member 22. As a result, when the lock mechanism 49 is unlocked to adjust the tilt of the steering handle 7, the steering column 11 and the steering handle 7 can be moved with a small force. Further, the vibration generated in the bracket 20 can be relaxed by the tension spring 28, so that the vibration isolation performance of the steering column 11 can be improved.

  Next, the arrangement of the four anti-vibration rubbers 42 attached to the bracket 20 will be described with reference to FIG. FIG. 11 is a perspective view showing the arrangement of the anti-vibration rubber 42 with respect to the bracket 20.

  As shown in FIG. 7, the anti-vibration rubber 42 is provided between the support member 41 and the base member 21 of the bracket 20. As shown in FIG. 11 and the like, each anti-vibration rubber 42 has a configuration in which a substantially cylindrical rubber body is disposed around the bolt shaft. Four circular holes are formed in the base member 21, and ring-shaped grooves formed on the outer peripheral surface of the rubber body are fixed to the respective circular holes. In this state, the bolt 20 is bolted to the support member 41, so that the bracket 20 can be supported by the support member 41 in a vibration-proof manner.

  Two of the four anti-vibration rubbers 42 are attached to the front attachment portion 21a provided in the base member 21 with their bolt shafts facing in the front-rear direction. The remaining two are attached to the left and right lower attachment portions 21c with their bolt shafts directed vertically. Since the lower attachment portion 21c is disposed at a position lower than the front attachment portion 21a, two of the four anti-vibration rubbers 42 are disposed relatively high as shown in FIG. Is placed low.

  Furthermore, the upper two of the four anti-vibration rubbers 42 are provided at positions higher than the rotation shaft 27 of the movable member 22 in the bracket 20, and the lower two are at positions lower than the rotation shaft 27. Is provided. In addition, the height difference (the height difference between the center points of the rubber bodies) L1 of the anti-vibration rubber 42 provided at two heights in this way is larger than the diameter D1 of the bottom surface of the steering column 11. (L1> D1). By arranging the anti-vibration rubbers 42 sufficiently apart from each other in this way, the bracket 20 due to the deformation of the anti-vibration rubbers 42 is compared with the case where the anti-vibration rubbers are arranged at the tilt fulcrum of the steering column 11 as in the prior art. The movement becomes smaller. As a result, the stability of the bracket 20 is improved, so that the vibration isolation performance of the steering column 11 and the steering handle 7 can be improved.

  Further, as shown in FIG. 11 which is a perspective view of the bracket 20 as viewed from the front, the two upper vibration-proof rubbers 42 are arranged at intervals in the left-right direction. L2 is greater than the diameter D1 of the bottom surface of the steering column 11 (L2> D1). Similarly, the lower two anti-vibration rubbers 42 are also spaced apart in the left-right direction, and the distance in the left-right direction (the distance between the center points of the rubber bodies) L3 is the diameter D1 of the bottom surface of the steering column 11. It is larger (L3> D1). In this way, the bracket 20 can be further stabilized against vibration by disposing the anti-vibration rubber 42 in the left-right direction as well.

  Furthermore, as shown in FIG. 9, the upper two anti-vibration rubbers 42 and the lower two anti-vibration rubbers 42 are arranged at different positions in the height direction as described above, and also differ in the front-rear direction. Placed in position. Further, the upper two anti-vibration rubbers 42 and the lower two anti-vibration rubbers 42 have the same configuration, but are arranged such that the directions of the bolt shafts are different from each other. Therefore, the bracket 20 can be more effectively prevented from vibration.

  Next, a configuration that allows the bracket 20 to be fixed to the support member 41 at two levels of height will be described with reference to FIGS. 12 and 13. FIG. 12 is a perspective view showing a state of the support member 41 and the bracket 20 in a tractor having a specification with a low steering column 11. FIG. 13 is a perspective view showing the state of the support member 41 and the bracket 20 in a tractor with a high specification of the steering column 11. In FIGS. 12 and 13, the shaft member 26, the lock mechanism 49, and the like are not shown for easy understanding of the fixing structure between the support member 41 and the bracket 20.

  As shown in FIGS. 12 and 13, the support member 41 to which the bracket 20 is fixed is configured as a plate-like member that is bent at a plurality of locations so as to have a gate shape when viewed from the front.

  The support member 41 is integrally provided with a front surface portion 41a, a pair of left and right side portions 41b, and a pair of left and right bent portions 41c.

  The front surface portion 41a is formed in a plate shape whose thickness is directed in the front-rear direction. A plurality of mounting holes 41v for mounting a pair of left and right vibration isolating rubbers 42a are formed in the front surface portion 41a. The position of the mounting hole 41v corresponds to the circular hole 21v formed in the front mounting portion 21a of the base member 21. The mounting holes 41v are arranged in two pairs on the left and right sides of the front surface portion 41a. In other words, the front portion 41a is formed with an upper pair of left and right mounting holes 41v and a lower pair of left and right mounting holes 41v. The four mounting holes 41v and 41w have the same shape.

  Each pair (set) of mounting holes 41v is arranged to be the same as the other pair (set) of mounting holes 41v in the left-right direction and the front-rear direction, but in different vertical positions. The upper set of mounting holes 41v and the lower set of mounting holes 41v are arranged so that their heights are different by L4. The upper set of attachment holes 41v is formed in the vicinity of the upper end of the support member 41.

  Each of the pair of side surface portions 41b is formed in a plate shape whose thickness is directed in the left-right direction. Each side surface portion 41b extends rearward from both left and right end portions of the front surface portion 41a, extends downward, and is further extended rearward. The side surface portion 41b is connected to the front surface portion 41a so as to be vertical in a plan view. The pair of side surface parts 41b are arranged in parallel to each other, and an appropriate space for arranging the front side attaching part 21a of the bracket 20 is formed between them.

  Each of the pair of bent portions 41c is formed in a plate shape whose thickness is directed in the vertical direction. Each bending part 41c is arrange | positioned so that it may protrude on the left-right outer side from the upper end of the part extended back in the lower end part of a pair of side part 41b. The bent portion 41c is connected to the side surface portion 41b so as to be vertical in a front view. Each bent portion 41c is formed with an attachment hole 41w for attaching the bolt shaft of the anti-vibration rubber 42b.

  With this configuration, when manufacturing a tractor having a specification in which the position of the steering column 11 is low, the rubber body of the anti-vibration rubber 42b is attached to each of the circular holes 21w in the pair of left and right lower mounting portions 21c of the bracket 20. The bolt shaft of the anti-vibration rubber 42b is attached to the attachment hole 41w formed in the bent portion 41c of the support member 41 by bolting. Further, the rubber body of the anti-vibration rubber 42 a is attached to the pair of left and right circular holes 21 v in the front mounting portion 21 a of the bracket 20, and the bolt shaft of the anti-vibration rubber 42 a is formed on the front surface portion 41 a of the support member 41. Of the two sets (four) of attachment holes 41v, the lower attachment holes 41v are attached by bolting. As described above, as shown in FIG. 12, the specification in which the steering column 11 is at a relatively low position can be realized.

  On the other hand, when manufacturing a tractor having a specification in which the position of the steering column 11 is high, spacers (mounting members) 43 are fixed to a pair of left and right bent portions 41c of the support member 41 as shown in FIG. To do.

  The spacer 43 is configured by appropriately bending a metal plate-like member, and includes a base portion (fixed portion) 43a, an intermediate portion (connecting portion) 43b, and a bent portion (parallel portion) 43c. ing.

  The base portion 43a is formed in a plate shape whose thickness direction is directed in the vertical direction. The intermediate portion 43b is formed in a plate shape whose thickness direction is directed in the left-right direction, and extends upward from an end on the inner side in the left-right direction of the base portion 43a. The bent portion 43c is formed in a plate shape whose thickness is directed in the vertical direction. Each bending part 43c is arrange | positioned so that it may protrude on the left-right outer side from the upper end of the intermediate part 43b. An attachment hole 43w for attaching the bracket 20 via the anti-vibration rubber 42b is formed in the bent portion 43c.

  The base part 43a and the bent part 43c are connected to the intermediate part 43b so as to be vertical in a front view. The bent portion 43c and the base portion 43a are oriented parallel to each other, and the height difference L5 between the upper surface of the bent portion 43c and the lower surface of the base portion 43a is the upper two of the four mounting holes 41v described above. It is equal to the height difference L4 between the two (sets) and the lower two (sets) (L5 = L4).

  The base portion 43a of the spacer 43 configured as described above is fixed to the upper surface of the pair of left and right bent portions 41c by, for example, a method such as welding (in the specification of FIG. 13, the mounting hole 41w is substantially Not used). Thereafter, the rubber body of the anti-vibration rubber 42b is attached to each of the circular holes 21w in the pair of left and right lower mounting portions 21c of the bracket 20, and the bolt shaft of the anti-vibration rubber 42b is attached to the bent portion 43c of the spacer 43. It attaches by bolting to the formed attachment hole 43w. Further, the rubber body of the anti-vibration rubber 42 a is attached to the pair of left and right circular holes 21 v in the front mounting portion 21 a of the bracket 20, and the bolt shaft of the anti-vibration rubber 42 a is formed on the front surface portion 41 a of the support member 41. Of the two sets (four) of attachment holes 41v, the upper attachment holes 41v are attached by bolting. As described above, as shown in FIG. 13, the specification in which the steering column 11 is at a relatively high position can be realized.

  Thus, according to the configuration of the present embodiment, a plurality of specifications in which the mounting height of the bracket 20 is different in two stages can be realized with a simple configuration. In any of the specifications, the bracket 20 is fixed to the support member 41 at a position near the upper end (position of the circular hole 21v) and a position near the lower end (position of the circular hole 21w). It can be supported stably. Furthermore, since the mounting hole 41v used for mounting the bracket 20 at a high position is disposed in the vicinity of the upper end of the support member 41, the support member 41 of the bracket 20 is suppressed while suppressing the upward protrusion amount of the support member 41. It is possible to ensure a large range in which the mounting height with respect to can be changed.

  Next, an attachment structure that the tractor 100 according to the present embodiment can attach to the dashboard 50 at different positions in the vertical direction will be described with reference to FIGS. 14 to 16. FIG. 14 is an exploded perspective view showing a mounting structure of the dashboard 50. FIG. 15 is a diagram illustrating a state in which the dashboard support member 40 is attached to the fuel tank cover 30. FIG. 16 is a perspective view showing the configuration of the dashboard 50.

  As shown in FIG. 14, in the tractor 100 of this embodiment, a dashboard 50 is attached to a fuel tank cover 30 that covers a rear portion 19 c of the fuel tank 19 via a dashboard support member 40. Note that the dashboard 50 can be directly attached to the fuel tank cover 30 without the dashboard support member 40 (details will be described later), and for easy understanding, the dashboard support member 40 is shown in FIG. It is drawn with a chain line.

  The fuel tank 19 is formed in a hollow shape by a synthetic resin, and as shown in FIG. 14, the fuel tank 19 includes a front portion 19 b provided with an oil filling port 19 a and a rear portion 19 c covered by a fuel tank cover 30. The A cover frame 24 to which the fuel tank cover 30 can be attached is provided between the front portion 19b and the rear portion 19c. The cover frame 24 may be formed integrally with the fuel tank 19 or may be attached to the fuel tank 19 as a separate part.

  The fuel tank cover 30 includes a cover portion 30a that covers the rear portion 19c of the fuel tank 19, and a frame portion 30b that extends from the edge of the cover portion 30a. The fuel tank cover 30 is disposed immediately behind the fuel tank 19 and is attached to the cover frame 24 by bolting or the like via the frame portion 30b.

  The cover portion 30 a of the fuel tank cover 30 is formed in a shape that follows the shape of the rear portion 19 c of the fuel tank 19. Moreover, the cover part 30a becomes a shape by which the front was open | released. In order to attach the dashboard 50 to the cover portion 30a, the cover portion 30a includes a first attachment portion (attachment portion) 31, a second attachment portion 34, a third attachment portion 35, as shown in FIG. A fourth attachment portion (operation panel portion attachment portion) 36 and a fifth attachment portion (operation panel portion attachment portion) 37 are formed.

  One first attachment portion 31 is provided on each of the left and right sides of the upper portion of the cover portion 30a. As shown in FIGS. 14 and 15, each first mounting portion 31 has a flat surface portion 31 a that extends substantially horizontally along the front-rear direction of the cover portion 30 a. A front mounting portion 32 is provided at one end (front end) in the longitudinal direction of the flat surface portion 31a, and a rear mounting portion 33 is provided at the other end (rear end).

  The front attachment portion 32 is formed at the front end of the first attachment portion 31 (the end portion on the side close to the front portion 19b of the fuel tank 19), and is disposed so as to protrude above the flat portion 31a of the first attachment portion 31. Has been. As shown in FIG. 15, the front mounting portion 32 is formed so that the shape when viewed in the front-rear direction is a gate shape.

  An insertion space 32a is formed inside the portal portion. Although details will be described later, when the dashboard 50 is attached without the dashboard support member 40, the insertion protrusion 73 (FIG. 16) of the dashboard 50 can be inserted into the insertion space 32a. As shown in FIG. 15, the front mounting portion 32 is formed with a through hole that is elongated in the front-rear direction and opens the front end side for mounting bolts and the like.

  The rear attachment portion 33 is provided at the rear end of the first attachment portion 31. At the center position in the width direction, there is formed a through hole that is elongated in the front-rear direction and opens the rear end side for attaching a bolt or the like. The rear attachment portion 33 is disposed at a position slightly lower than the front attachment portion 32.

  A dashboard support member 40 that functions as a spacer is attached to the first attachment portion 31, and the dashboard 50 can be attached to the upper portion of the dashboard support member 40. . Thereby, the dashboard 50 can be arrange | positioned in a position relatively higher than the case where the dashboard 50 is directly attached to the 1st attaching part 31. FIG. The details of the dashboard support member 40 will be described later.

  The second attachment portion 34 is provided on the left and right side surfaces of the fuel tank cover 30 at the front end portion at the lower end portion of the cover portion 30 a so as to protrude outward in the left-right direction of the fuel tank cover 30. The second attachment portion 34 is formed with a long hole that is elongated in the front-rear direction and opens the rear end side for attaching a bolt or the like.

  The third attachment portion 35 is provided on the left and right side surfaces of the fuel tank cover 30 slightly above the second attachment portion 34 so as to protrude outward in the left-right direction of the fuel tank cover 30. The third attachment portion 35 is formed with a long hole that is elongated in the front-rear direction and opens the rear end side for attaching a bolt or the like.

  Thus, as shown in FIG. 15, the second mounting portion 34 and the third mounting portion 35 are provided in pairs on the left and right side surfaces of the fuel tank cover 30 with a predetermined interval in the vertical direction. . Note that the distance in the vertical direction between the centers of the long holes formed in the second mounting portion 34 and the third mounting portion 35 depends on whether the mounting position of the dashboard 50 depends on the presence or absence of the dashboard support member 40 described above. It is set to match the amount that changes.

  The fourth attachment portion 36 is formed on the rear surface of the fuel tank cover 30 and on the left side so as to protrude rearward of the fuel tank cover 30. The fourth attachment portion 36 is formed with an insertion hole to which a bolt or the like can be attached.

  The fifth attachment portion 37 is formed on the rear side of the fuel tank cover 30 and on the right side so as to protrude rearward of the fuel tank cover 30. As shown in FIG. 15, the fifth mounting portion 37 is formed with three insertion holes in which a bolt or the like can be mounted in the vertical direction.

  The dashboard support member 40 shown in FIG. 15 is formed from a metal flat plate-like member. The dashboard support member 40 includes a quadrangular main body 40a oriented such that the thickness direction is the left-right direction. The dashboard support member 40 includes a first lower mounting portion 45 and a second lower mounting portion 46 provided at the lower edge portion of the main body 40a, and a first upper mounting portion 47 provided at the upper edge portion of the main body 40a. And a second upper mounting portion 48.

  The first lower attachment portion 45 and the second lower attachment portion 46 are formed by bending small attachment portions extending downward at both front and rear direction end portions of the lower edge portion of the main body 40a so as to be perpendicular to the main body 40a. Is formed.

  The first lower mounting portion 45 and the second lower mounting portion 46 are oriented substantially horizontally (in other words, parallel to the flat surface portion 31a of the first mounting portion 31 included in the fuel tank cover 30). Further, the second lower mounting portion 46 is disposed at a position slightly lower than the first lower mounting portion 45. The first lower mounting portion 45 and the second lower mounting portion 46 are formed with through holes into which bolts or the like can be inserted.

  The distance in the front-rear direction between the first lower attachment portion 45 and the second lower attachment portion 46 is the front-rear direction between the front attachment portion 32 and the rear attachment portion 33 in the first attachment portion 31. It is set to match the distance. The vertical distance between the first lower mounting portion 45 and the second lower mounting portion 46 is such that the front mounting portion 32 (the upper surface of the front mounting portion 32) and the rear portion of the first mounting portion 31. The distance between the mounting portion 33 and the mounting portion 33 is set to coincide with the vertical distance. As described above, since the positional relationship between the attachment portions corresponds, the dashboard support member 40 can be reliably attached to the first attachment portion 31 at two locations.

  Then, the first lower mounting portion 45 is mounted on the front mounting portion 32 and the second lower mounting portion 46 is mounted on the upper surface of the rear mounting portion 33. The long hole of the front attachment part 32 of the first attachment part 31 is bolted to the through hole of the second lower attachment part 46, and the long hole of the rear attachment part 33 is bolted. Thereby, the dashboard support member 40 can be easily attached to the fuel tank cover 30.

  The first upper mounting portion 47 and the second upper mounting portion 48 are formed by bending small mounting portions extending upward at both longitudinal ends of the upper edge of the main body 40a so as to be perpendicular to the main body 40a. Has been.

  The first upper mounting portion 47 and the second upper mounting portion 48 are oriented substantially horizontally (in other words, parallel to the first lower mounting portion 45 and the second lower mounting portion 46). A rectangular hole is formed in the first upper mounting portion 47 so as to penetrate in the vertical direction. Although details will be described later, an insertion protrusion 73 (FIG. 16) provided in the dashboard 50 can be inserted into the rectangular hole. As shown in FIG. 15, the second upper mounting portion 48 is formed with a through hole into which a bolt or the like can be inserted.

  The dashboard 50 is attached to the dashboard support member 40 via the first upper attachment portion 47 and the second upper attachment portion 48 so as to cover the rear of the fuel tank cover 30 (details will be described later).

  As shown in FIG. 16, the dashboard 50 is fitted with various instruments such as a speedometer and a fuel gauge, and is fitted to the operation panel 60 constituting the operation panel 10 of the tractor 100 and the outer periphery of the operation panel 60. And an outer peripheral board portion 70 fixed by joining.

  As shown in FIG. 16, the operation panel unit 60 includes a main panel unit 60a and an extending unit 60b that extends downward from the center of the main panel unit 60a. The main panel 60a has a panel surface facing rearward and upward. A pair of recesses 65 that can accommodate the protrusions 75 formed on the outer peripheral board portion 70 are formed at the lower end of the extending portion 60b and on the outer side in the left-right direction.

  On the outer periphery of the main panel portion 60a, an outer edge portion 66 is formed that is bent forward (on the fuel tank cover 30 side when attached to the fuel tank cover 30).

  Two outer locking portions 61 and two lower locking portions 62 are formed on the outer edge portion 66 of the main panel portion 60a. The upper locking portion 61 and the lower locking portion 62 are configured to be engageable with the outer peripheral board portion 70. The two upper locking portions 61 and the two lower locking portions 62 are respectively formed at positions that are symmetrical with each other in the main panel portion 60a.

  The upper locking portion 61 is configured as a recess formed in a part of the outer edge portion 66 on the upper side of the main panel portion 60a. The lower locking portion 62 is configured as a quadrangular hole formed on the left and right sides of the extended portion 60b on the outer edge portion 66 on the lower side of the main panel portion 60a.

  In order to fix the operation panel 60 to the fuel tank cover 30, the operation panel 60 has two first fixing parts (fixing parts) 63 and two second fixing parts 64. Yes.

  The first fixing portion 63 is provided on the outer edge portion 66 on the upper side of the main panel portion 60 a at a position on the left and right outside of the two upper locking portions 61. The first fixing portion 63 is formed in a substantially horizontal flat plate extending forward from the main panel portion 60a. The first fixing portion 63 is formed with a through hole that is elongated in the front-rear direction and opens the front end side for attaching a bolt or the like.

  The two first fixing portions 63 are provided on the main panel portion 60a so as to correspond to the rear attachment portions 33 of the first attachment portions 31 provided on the left and right sides of the fuel tank cover 30, respectively. Therefore, the first fixing portion 63 and the rear mounting portion 33 of the first mounting portion 31 can be fixed to each other.

  The second fixing portion 64 is formed below the lower locking portion 62 and has a plate shape extending downward. The second fixing portion 64 is formed with a through hole that is elongated in the vertical direction and opens the lower end side for attaching a bolt or the like.

  In the following description, the second fixing portion 64 provided on the left side of the main panel portion 60a is referred to as a left fixing portion 64L, and the second fixing portion 64 provided on the right side of the main panel portion 60a is referred to as the right fixing portion. May be referred to as 64R.

  The outer peripheral board portion 70 is configured to cover the outer periphery of the fuel tank cover 30. An opening 70 a to which the operation panel unit 60 can be fitted and attached is formed at the center of the outer peripheral board unit 70.

  At the edge of the opening 70 a in the outer peripheral board part 70, it is hooked on two upper mounting parts 71 that can be hooked and fixed to the upper locking part 61 of the operation panel part 60 and the lower locking part 62 of the operation panel part 60. And two lower attachment portions 72 that can be fixed together.

  Each of the upper mounting portion 71 and the lower mounting portion 72 is formed as a small member that extends obliquely from the edge of the opening 70a toward the front lower side. Locking claws 71 a and 72 a for preventing the upper mounting portion 71 and the lower locking portion 62 from coming off are formed at the tips of the upper mounting portion 71 and the lower mounting portion 72, respectively.

  With the above configuration, the upper mounting portion 71 is inserted into the upper locking portion 61 of the operation panel portion 60 and hooked by the locking claw 71a, and the lower mounting portion 72 is hooked by the lower locking portion 62 of the operation panel portion 60. The outer peripheral board portion 70 can be fixed to the operation panel portion 60 by being inserted into the hook and hooked by the locking claws 72a.

  In order to attach the outer peripheral board portion 70 to the fuel tank cover 30, the outer peripheral board portion 70 is formed with an insertion protrusion (fixed portion) 73 and an attachment opening 74.

  As shown in FIG. 16, one insertion protrusion 73 is provided on the inner peripheral surface of the upper portion of the outer peripheral board portion 70 at positions that are symmetrical with respect to each other across the top portion. Each insertion protrusion 73 is formed in a small plate shape that extends obliquely from the inner peripheral surface of the outer peripheral board portion 70 toward the front lower side.

  The two insertion protrusions 73 are arranged at positions corresponding to the front attachment portions 32 of the first attachment portions 31 provided on the left and right sides of the upper portion of the fuel tank cover 30.

  The attachment openings 74 are formed as through-holes for attaching bolts or the like disposed on the left and right sides of the front edge of the outer peripheral board portion 70. Each attachment opening 74 is formed so as to extend obliquely from the front edge of the outer peripheral board 70 toward the rear upper side.

  The attachment opening 74 is located at a position corresponding to the third attachment portion 35 of the fuel tank cover 30 when the outer peripheral board portion 70 is attached to the fuel tank cover 30 with the dashboard support member 40 interposed as in the present embodiment. Has been placed. On the other hand, the second mounting portion 34 is disposed below the third mounting portion 35, and as described above, the distance between the third mounting portion 35 and the second mounting portion 34 is the mounting position of the dashboard 50. Is set to coincide with the amount that changes in the vertical direction depending on the presence or absence of the dashboard support member 40 described above. Therefore, when the dashboard 50 is attached through the dashboard support member 40, the attachment opening 74 can be fixed to the third attachment portion 35, while when the dashboard 50 is attached without the dashboard support member 40. The attachment opening 74 can be fixed to the second attachment portion 34.

  With the above configuration, the dashboard 50 can be attached to the fuel tank 19 and the fuel tank cover 30 at different positions in the vertical direction depending on whether or not the dashboard support member 40 is interposed. That is, most of the configuration of the tractor 100 of the present embodiment can be diverted to easily configure a tractor of another specification in which the dashboard 50 is low.

  Next, a structure when the dashboard 50 is attached to a relatively high position will be described with reference to FIG. FIG. 17 is a perspective view showing a state in which the dashboard 50 is attached to the fuel tank cover 30 via the dashboard support member 40. In addition, in order to show the inner structure of the dashboard 50 in an easy-to-understand manner, the outer peripheral board portion 70 is shown in a perspective manner with a chain line in FIG.

  In the tractor having the specification shown in FIG. 17, the dashboard 50 can be disposed at a relatively high position by attaching the dashboard support member 40 to the fuel tank cover 30.

  In order to realize the tractor of this specification, first, as described above, the through hole formed in the first lower mounting portion 45 of the dashboard support member 40 shown in FIG. A pair of dashboard support members 40 are attached to the fuel tank cover 30 by bolting to the long holes and bolting through holes formed in the second lower attachment portion 46 to the long holes of the rear attachment portion 33. .

  Next, the left attachment member (attachment member) 81 and the right attachment member (attachment member) 82 for attaching the operation panel portion 60 of the dashboard 50 are used as the fourth attachment portion 36 and the fifth attachment portion 37 of the fuel tank cover 30. Attach to each.

  As shown in FIG. 17, the left attachment member 81 is formed of an elongated plate member, and is attached to the fuel tank cover 30 so that the longitudinal direction thereof is up and down. A lower attachment hole (attachment hole) 81a is formed below the left attachment member 81, and an upper attachment hole (attachment hole) 81b is formed on the upper side. Bolts can be inserted into the lower mounting hole 81a and the upper mounting hole 81b. The center-to-center distance between the lower mounting hole 81a and the upper mounting hole 81b is ½ of the amount that the mounting position of the dashboard 50 changes in the vertical direction depending on the presence or absence of the dashboard support member 40 described above. Is set to

  The right mounting member 82 includes a starter switch support member 83 that supports a starter switch 124 (see FIGS. 4 and 6) that is a switch for starting the engine 5, and a bent member formed by bending an elongated plate member. 84.

  The starter switch support member 83 is formed of a plate-like member, and is arranged in an upright posture so that the thickness direction is front and rear. The starter switch support member 83 is formed with a penetrating support hole 85 for supporting the starter switch. In order to attach the starter switch support member 83 to the fuel tank cover 30, the starter switch support member 83 is formed with a lower mounting hole (mounting hole) 83a and an upper mounting hole (mounting hole) 83b arranged side by side in the vertical direction. Yes.

  The bending member 84 is formed by bending an elongated plate member into an L-shape, and is disposed so that the thickness direction on one side is left and right, and is disposed so that the thickness direction on the other side is front and rear. . And the part arrange | positioned so that the thickness direction may become right and left among the bending members 84 is attached to the left side surface of the starter switch support member 83 in the vicinity of the upper mounting hole 83b by an appropriate method (for example, welding). ing.

  On the other hand, a portion of the bending member 84 that is disposed so that the thickness direction is front and rear is disposed so as to protrude forward from the starter switch support member 83. Further, a through hole into which a bolt or the like can be inserted is formed in the protruding portion.

  When the dashboard 50 is attached to the fuel tank cover 30 at the height shown in FIG. 17, the lower attachment hole 81 a of the left attachment member 81 is bolted to the fourth attachment portion 36 of the fuel tank cover 30. Fixed. Further, the lower mounting hole 83a of the right mounting member 82 is fixed by bolting to the central insertion hole among the three insertion holes arranged in the vertical direction as shown in FIG. As described above, the left attachment member 81 and the right attachment member 82 are attached to the fuel tank cover 30.

  Thereafter, the operation panel unit 60 is attached. Specifically, as shown in FIG. 17, the second upper mounting portion of the dashboard support member 40 in which the long holes of the first fixing portion 63 arranged on the left and right of the operation panel portion 60 are arranged in a pair on the left and right. Each of the 48 through holes is bolted. Further, the long hole formed in the left side fixing portion 64L of the operation panel portion 60 is bolted to the upper side mounting hole 81b of the left side mounting member 81, and the long hole formed in the right side fixing portion 64R of the operation panel portion 60 is The right attachment member 82 is bolted to the through hole formed in the bending member 84.

  Next, the outer peripheral board part 70 is attached. Specifically, the insertion protrusion 73 of the outer peripheral board portion 70 is inserted into a rectangular hole formed in the first upper mounting portion 47 of the dashboard support member 40. Further, the upper mounting portion 71 and the lower mounting portion 72 are inserted into the upper locking portion 61 and the lower locking portion 62 of the operation panel 60, respectively, and fixed by being hooked.

  Then, the mounting opening 74 formed in the outer peripheral board portion 70 is bolted to the third mounting portion 35 of the fuel tank cover 30. When the dashboard 50 is attached at the height of FIG. 17, the attachment opening 74 is configured so that the position of the attachment opening 74 coincides with the third attachment part 35 of the fuel tank cover 30. 3 The mounting portion 35 can be bolted without any problem.

  In the tractor having the specification shown in FIG. 17 (the tractor 100 of the present embodiment) in which the dashboard 50 is mounted at a relatively high position, cover members 86 that cover the lower portion that is not covered by the dashboard 50 are provided on the left and right. Each cover member 86 is provided so as to be connected to the lower end of the dashboard 50 and the lower end of the fuel tank cover 30.

  In order to fix the cover member 86, a cover mounting portion 76 is provided at the lower end portion of the outer peripheral board portion 70 as shown in FIG. 16, and at the left and right lower ends of the frame portion 30b of the fuel tank cover 30, FIG. As shown in FIG. The cover member 86 is fixed to the cover attaching portions 76 and 38 by, for example, screwing. With this configuration, it is possible to suitably cover a portion exposed below the dashboard 50 and the fuel tank cover 30.

  Next, a structure when the dashboard 50 is attached to a relatively low position will be described with reference to FIG. FIG. 18 is a perspective view showing a tractor according to another specification in which the dashboard 50 is directly attached to the fuel tank cover 30. In addition, in order to show the inner configuration of the dashboard 50 in an easy-to-understand manner, the outer peripheral board portion 70 is also perspectively drawn with a chain line in FIG. 18 as in FIG.

  In the tractor having the specification shown in FIG. 18, the dashboard 50 is disposed at a relatively low position as compared with the case where the dashboard support member 40 is interposed by directly attaching the dashboard 50 to the fuel tank cover 30. become.

  In order to realize the tractor of this specification, first, the left side attachment member 81 and the right side attachment member 82 are attached to the fourth attachment part 36 and the fifth attachment part 37 of the fuel tank cover 30, respectively. However, the positions at which the left attachment member 81 and the right attachment member 82 are attached to the fuel tank cover 30 are different from those in FIG. That is, the upper attachment hole 81b (not the lower attachment hole 81a) of the left attachment member 81 is fixed to the fourth attachment portion 36 of the fuel tank cover 30 by bolting. Further, the two upper mounting holes 83b (not the lower mounting holes 83a) of the right mounting member 82 are inserted in the fifth mounting portion 37 other than the center among the three insertion holes arranged in the vertical direction as shown in FIG. It is fixed to the hole by bolting.

  As described above, the left attachment member 81 and the right attachment member 82 are attached to the fuel tank cover 30. Since the left mounting member 81 is mounted on the fourth mounting portion 36 so as to extend in the direction opposite to the case of FIG. 17, the distance between the lower mounting hole 81a and the upper mounting hole 81b is set small. The dashboard 50 can be attached to the fuel tank cover 30 in both cases of FIGS.

  Thereafter, as shown in FIG. 18, the long holes of the first fixing portions 63 arranged on the left and right of the operation panel portion 60 are respectively bolted to the long holes of the rear mounting portion 33 of the first mounting portion 31 in the fuel tank cover 30. Stopped. Further, the long hole formed in the left side fixing portion 64L of the operation panel portion 60 is bolted to the lower side mounting hole 81a of the left side mounting member 81, and the long hole formed in the right side fixing portion 64R of the operation panel portion 60 is formed. The bolts are bolted to the through holes formed in the bending member 84 of the right mounting member 82.

  Next, the outer peripheral board part 70 of the dashboard 50 is attached. Specifically, as shown in FIG. 18, the insertion protrusion 73 of the outer peripheral board portion 70 is inserted into the insertion space 32 a of the front attachment portion 32 of the first attachment portion 31. Further, the upper mounting portion 71 and the lower mounting portion 72 are inserted into the upper locking portion 61 and the lower locking portion 62 of the operation panel 60, respectively, and fixed by being hooked.

  Then, the mounting opening 74 formed in the outer peripheral board portion 70 is bolted to the second mounting portion 34 of the fuel tank cover 30. When the dashboard 50 is attached at the height of FIG. 18, the attachment opening 74 is configured so that the position of the attachment opening 74 coincides with the second attachment portion 34 of the fuel tank cover 30. 2 It can fix to a mounting part 34 with a volt | bolt without a problem. Moreover, in the specification of FIG. 18, the cover member 86 attached in FIG. 17 is omitted.

  As described above, it is possible to realize a structure in which the dashboard is mounted at two positions in the vertical direction only by the presence or absence of the dashboard support member 40 without changing the structures of the dashboard 50 and the fuel tank cover 30. Accordingly, the existing dashboard 50 and the fuel tank cover 30 can be used for the tractor of another specification shown in FIG. 18, and the labor and cost for parts management can be greatly reduced.

  As described above, the tractor 100 according to the present embodiment includes the steering column 11, the bracket 20, and the support member 41. The bracket 20 supports the steering column 11. The support member 41 is formed with a plurality of attachment holes 41v. The bracket 20 and the support member 41 are fixed by a vibration isolating rubber 42a attached to the attachment hole 41v. The support member 41 has one set of mounting holes 41v and at least one other set of mounting holes 41v having the same position in the left-right direction and the front-rear direction and different positions in the vertical direction with respect to the set of mounting holes 41v. And are formed. In the specification of FIG. 12 and the specification of FIG.

  Thereby, the height at which the steering column 11 is arranged can be changed while using the common support member 41. As a result, it is possible to share parts for tractors with different specifications and to reduce costs.

  In the tractor having the specification shown in FIG. 13, a bent portion 41 c is formed in a part of the support member 41 by bending at least one portion of the support member 41. The bent portion 41 c is disposed below the support member 41. A mounting hole 41w to which the anti-vibration rubber 42b can be mounted is formed in the bent portion 41c. A spacer 43 is attached to the bent portion 41c. The spacer 43 is formed with a bent portion 43c arranged in parallel with the bent portion 41c. An attachment hole 43w to which the vibration isolating rubber 42b can be attached is formed in the bent portion 43c. The position of the attachment hole 43w of the bent portion 43c of the spacer 43 is the same as that of the attachment hole 41w of the bent portion 41c of the support member 41 in the front-rear direction and the left-right direction.

  Accordingly, in the specification in which the bracket 20 is fixed to the support member 41 at a relatively low position as shown in FIG. 12, the mounting hole 41w of the bent portion 41c formed in the support member 41 is provided with the vibration isolating rubber 42b. A bracket 20 can be attached. On the other hand, in the specification in which the bracket 20 is fixed to the support member 41 at a relatively high position as shown in FIG. 13, the spacer 43 is fixed to the bent portion 41 c of the support member 41 and the bent portion 43 c of the spacer 43 is attached. The bracket 20 can be attached to the hole 43w via a vibration-proof rubber 42b. Thus, by switching the presence or absence of the spacer 43, a plurality of specifications with different heights of the steering column 11 can be easily realized.

  Moreover, in the tractor 100 of this embodiment, the bending part 41c of the supporting member 41 is plate shape, and the thickness has faced the up-down direction. In the specification of FIG. 13, the spacer 43 includes a bent portion 41c, a base portion 43a fixed to the bent portion 41c of the support member 41, and an intermediate portion 43b connecting the base portion 43a and the bent portion 43c. , Is included.

  Thereby, the specification that the steering column 11 is attached to a relatively high position can be realized by the spacer 43 having a simple configuration.

  Further, in the tractor 100 of this embodiment, the bracket 20 is fixed to the support member 41 in the vicinity of the upper end and the vicinity of the lower end of the bracket 20.

  Thereby, the stability of the steering column 11 in the state attached to the support member 41 can be improved.

  Further, in the tractor 100 of the present embodiment, the upper two mounting holes 41 v among the four mounting holes 41 v are formed in the vicinity of the upper end of the support member 41.

  Thereby, the range which can change the attachment height with respect to the support member 41 of the bracket 20 can be ensured largely, realizing the downsizing of the support member 41 in the vertical direction.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  The number of the anti-vibration rubbers 42a and 42b is not limited to two each as in the above embodiment, and can be changed as appropriate.

  The mounting holes 41v and 41w of the support member 41 may be formed with a large diameter in order to mount the rubber bodies of the vibration isolating rubbers 42a and 42b. In this case, the circular holes 21v and 21w on the bracket 20 side may be formed with a small diameter so that the bolt shafts of the vibration isolating rubbers 42a and 42b can be inserted.

  Instead of the anti-vibration rubbers 42a and 42b, the bracket 20 may be fixed to the support member 41 using a fixture (for example, a bolt and a nut) that does not have an anti-vibration function.

  A location other than the base portion 43a of the spacer 43 (for example, the intermediate portion 43b) may be fixed to the support member 41 by welding. Further, the spacer 43 may be fixed to the support member 41 by means other than welding (for example, bolting to the mounting hole 41w).

  In the above embodiment, the set of mounting holes 41v formed in the front surface portion 41a of the support member 41 is two sets consisting of an upper set and a lower set. The above attachment holes 41v can also be formed. Thereby, the specification which changed the height of the steering column 11 into three steps or more is realizable. In this case, regarding the fixing of the lower attachment portion 21c, a plurality of types of spacers may be prepared or the number of spacers connected vertically may be changed according to the height at which the bracket 20 is attached.

  In the two specifications (FIGS. 12 and 13), the overall shape of the support member 41 does not have to be completely the same. For example, when a pedal operating tool such as a brake pedal is supported on the support member 41, there are cases where it is desired to vary the arrangement of the pedal operating tool for each country-specific specification. In this case, a part (for example, the front part 41a and the bent part 41c) of the support member 41 may be common, and the other parts may be different for each specification.

11 Steering column 20 Bracket 41 Support member 41c Bending portion 41v Mounting hole 41w Mounting hole 43 Spacer (mounting member)
43a Base part (fixed part)
43b Middle part (connection part)
43c Bent part (parallel part)
43w Mounting hole 42a Anti-vibration rubber (fixing tool)
42b Anti-vibration rubber (second fixture)

Claims (5)

A steering column;
A bracket for supporting the steering column;
A support member formed with a plurality of mounting holes;
With
The bracket and the support member are fixed by a fixture attached to the attachment hole,
The support member includes one set of the mounting holes and at least one other set of mounting holes in which the positions in the left-right direction and the front-rear direction are the same and the positions in the vertical direction are different with respect to the set of mounting holes. And formed,
The tractor according to claim 1, wherein the fixture is attached to one of the attachment holes among a plurality of sets. The tractor according to claim 1,
By folding at least one portion of the support member, a bent portion is formed in a part of the support member,
The bent portion is disposed below the support member;
The bent portion is formed with the attachment hole to which the second fixing tool can be attached,
An attachment member is attached to the bent portion,
The mounting member is formed with a parallel portion arranged in parallel with the bent portion,
The parallel part is formed with an attachment hole to which the second fixture can be attached,
The position of the mounting hole of the parallel part is the same as the mounting hole of the bent part in the front-rear direction and the left-right direction. A tractor according to claim 2, wherein
The bent portion is plate-shaped, and its thickness is directed in the vertical direction,
The tractor according to claim 1, wherein the attachment member includes the parallel part, a fixing part fixed to the bent part, and a connection part connecting the parallel part and the fixing part. A tractor according to any one of claims 1 to 3,
The tractor, wherein the bracket is fixed to the support member in the vicinity of the upper end and the lower end of the bracket. The tractor according to claim 4,
At least one of the mounting holes is formed in the vicinity of the upper end of the support member.

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