JP4890381B2 - Management machine - Google Patents

Description

  The present invention relates to a management machine used for farm work. In detail, it is related with the structure for giving resistance to the advancing direction of a management machine.

  Patent document 1 discloses the structure which equips the rear part of a management machine with a resistance rod and a tail wheel in the axle working type management machine provided with a tillage part. In the management machine of Patent Document 1, a rotating frame having a resistance rod on one end side and a tail wheel on the other end side is integrally formed, and a rotating shaft extending in the longitudinal direction of the machine body is provided at an intermediate portion of the rotating frame. At the center, it is attached to a resistance bar action position where the resistance bar contacts the ground and a tail wheel action position where the tail wheel contacts the ground.

With this configuration, Patent Document 1 is simple and quick between a state in which resistance is applied to the traveling direction of the management machine and a state in which the management machine can be easily moved by an operation of switching between the resistance bar action position and the tail wheel action position. Suppose you can switch to
Japanese Patent Laid-Open No. 8-222001

  However, in the configuration of Patent Document 1, it is necessary to invert the rotating frame in order to switch between the resistance rod action position and the tail wheel action position, and a structure that can be switched by a simpler operation has been demanded. . Moreover, since patent document 1 is equipped with both the resistance rod and the tail wheel, the room for improvement was left from a viewpoint of cost reduction, weight reduction, and compactization.

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 the 1st viewpoint of this invention, the following structures are provided in the axle working type management machine provided with a tillage part. That is, this management machine comprises a wheel behind the tillage part and is configured to be able to adjust the height of the wheel. Moreover, the said management machine is provided with the braking means which provides resistance to rotation of the said wheel. When the height of the wheel is adjusted to a predetermined height, the braking means is configured to act.

  According to this, at the time of tillage work, resistance can be generated by adjusting the height of the wheel to a predetermined height and operating the braking means, and the traveling speed of the management machine can be adjusted. In addition, when the management machine is moved other than tillage work, it can be moved in a state where resistance by the braking means is not applied by adjusting the height of the wheel to be higher than a predetermined height. Thus, it is possible to switch between a state suitable for tillage work and a state suitable for movement by a simple operation of adjusting the height of the wheel. Therefore, various operations can be started immediately, and the efficiency can be improved.

  The management machine preferably has the following configuration. That is, the brake means includes a link mechanism and a brake member. When the height of the wheel is adjusted to a predetermined height, the brake member is pressed against the wheel and acts by the link mechanism.

  According to this, the adjustment of the height of the wheel and the switching of the application / release of the resistance to the wheel can be linked with a simple configuration by the link mechanism and the braking member.

  The management machine preferably has the following configuration. That is, the link mechanism includes a link member. One end of the link member is connected to the rear part of the fuselage, and the other end is connected to the braking member.

  According to this, the braking member is pressed against the wheel by the link member striking between the rear part of the machine body, and a strong resistance can be easily imparted.

  In the management machine, the braking member is preferably a rod member.

  According to this, even if the link mechanism and the wheel are separated from each other, the braking member is configured in a rod shape, so that resistance can be reliably imparted to the wheel.

  The management machine preferably has the following configuration. That is, the link member is configured to be bendable. The link mechanism includes a biasing member that biases the link member in a bending direction.

  According to this, the application / release of resistance to the wheel can be easily switched by interlocking the bending / extension of the link member and the pressing / pressing release of the braking member to the wheel. Further, since the link member is urged in the bending direction by the urging member, the resistance applied to the wheel can be easily released.

  The management machine preferably includes an operation member connected to the link member, and the link member is extended by operating the operation member.

  According to this, it is possible to easily switch the application / release of the resistance to the wheel by operating the operation member. Accordingly, various operations such as tillage can be performed more easily.

  Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a management machine according to the first embodiment of the present invention. FIG. 2 is a rear view of the management machine.

  The management machine 10 according to the first embodiment shown in FIG. 1 is configured as a so-called axle work type management machine. The management machine 10 of the present embodiment includes a machine body 20, and the machine body 20 includes an engine 11, a transmission case 12, an axle 13, a tilling unit 14, a fuel tank 15, and a handle 16.

  The engine 11 is mounted on the upper front part of the airframe 20, and the mission case 12 is provided at the lower part of the airframe 20. Further, as shown in FIG. 2 which is a rear view, the axle 13 is provided so as to protrude horizontally from the lower part of the transmission case 12 to the left and right sides.

  A plurality of tilling claws are detachably attached to the axle 13, thereby constituting a tilling portion 14. In FIGS. 1 and 2, the tillage unit 14 is schematically indicated by a chain line.

  As shown in FIG. 1, the fuel tank 15 is disposed at the rear part of the airframe 20. The handle 16 is attached to the rear portion of the machine body 20 via a handle frame 17.

  With the above configuration, the power of the engine 11 is transmitted to the axle 13 through the mission case 12, and the tilling claw of the tilling portion 14 can rotate to perform tilling work. In addition, the operator can operate the management machine 10 by grasping the handle 16 with his / her hand while walking behind the management machine 10 in accordance with the advance of the management machine 10.

  As shown in FIGS. 1 and 2, a support arm 31 is attached to the rear portion of the machine body 20 so as to be rotatable about an arm rotation shaft 32. FIG. 3 shows an enlarged side view of the rear portion of the machine body 20, and as shown in FIG. 3, a wheel (tail wheel) 33 is rotatably attached to the distal end side of the support arm 31. In the present embodiment, the wheel 33 is configured as a rubber ring. A groove may be formed on the outer peripheral surface of the wheel 33 in accordance with the conditions of the field.

  The support arm 31 includes a plurality of pin holes 40 on the proximal end side. These pin holes 40 are formed at equal intervals along an arc centered on the rotation center of the support arm 31 (arm rotation shaft 32). The fixing pin 41 is inserted into any one of the plurality of pin holes 40, and the fixing pin 41 is inserted into a hole (not shown) formed in the rear portion of the machine body 20, thereby making the support arm 31 unrotatable. Can be fixed.

  With the above configuration, the operator can adjust the height of the wheels 33 within a predetermined range by grasping and rotating the support arm 31 by hand. After the adjustment, the height of the wheel 33 can be fixed by fixing the angle of the support arm 31 with the fixing pin 41.

  As shown in FIG. 3, a link support shaft 37 is provided at the rear of the machine body 20. Further, one end of a brake link (link member) 34 is rotatably attached to the link support shaft 37. A brake rod (braking member) 35 is fixed to the other end of the brake link 34. The brake rod 35 is inserted into a long hole 36 formed in the support arm 31 so as to penetrate therethrough.

  A link mechanism 59 for interlocking the support arm 31 and the brake rod 35 is constituted by the brake link 34 and the like. The link mechanism 59, the brake rod 35, and the like constitute a resistance applying portion (braking means) 50 that applies resistance to the wheel 33.

  The long hole 36 is elongated in the direction along the longitudinal direction of the support arm 31, and the brake rod 35 is configured to be slidable within the long hole 36. Since the rotation center (link support shaft 37) of the brake link 34 and the rotation center (arm rotation shaft 32) of the support arm 31 are arranged at different positions, the height of the wheel 33 is changed (support arm 31). ), The brake rod 35 at the tip of the brake link 34 moves along the long hole 36. The brake rod 35 is configured to come into contact with the upper portion of the wheel 33 when the wheel 33 reaches a predetermined height.

  The support arm 31, the wheel 33, and the brake link 34 described above are provided in pairs on the left and right sides of the airframe 20, as shown in FIG. The left and right brake links 34 are disposed on the center side of the body sandwiched between the left and right support arms 31, and the wheels 33 are disposed outside the left and right support arms 31. Therefore, the brake link 34 is located away from the wheel 33.

  The front ends of the brake links 34 arranged on the left and right sides of the machine body are connected to one brake rod 35. The brake rod 35 is horizontally disposed in the left-right direction of the machine body and is inserted through the long holes 36 of the left and right support arms 31. Further, both ends of the brake rod 35 are located in the vicinity of the left and right wheels 33.

  Next, with reference to FIGS. 3 and 4, adjustment of the height of the wheel 33 and application and release of resistance to the wheel 33 will be described. FIG. 3 is an enlarged side view showing a state in which the brake rod 35 is separated from the wheel 33. FIG. 4 is an enlarged side view showing a state where the brake rod 35 is in contact with the wheel 33.

  When plowing work is performed with the management machine 10 of the present embodiment, the operator removes the fixing pin 41 from the pin hole 40 and rotates the support arm 31 downward from the state shown in FIG. Then, the position of the wheel 33 is lowered, and the brake rod 35 slides in the distal direction of the support arm 31 along the long hole 36. When the height of the wheel 33 reaches a predetermined height, the brake rod 35 comes into contact with the upper portion of the wheel 33 as shown in FIG. 4, and the wheel 33 cannot be lowered any further. In this state, the operator inserts the fixing pin 41 into the pin hole 40 and fixes the support arm 31.

  When the engine 11 is driven in this state, the cultivating section 14 rotates to cultivate the field, and the reaction force acts in a direction to advance the management machine 10. Since the wheel 33 is grounded, it tries to rotate as the management machine 10 advances.

  However, the brake rod 34 is strongly pressed against the wheel 33 by stretching the brake link 34 with the rear part of the machine body 20, and thus resistance is given. Thereby, the brake action with respect to the advance of the management machine 10 is performed, and the traveling speed can be adjusted, and so-called dashing of the management machine 10 can be prevented. In addition, since the wheel 33 is adjusted to a low height position (lowermost position), the ground contact state of the wheel 33 is always maintained, and a stable braking action can be realized.

  When the management machine 10 is moved after the plowing operation is completed, the operator removes the fixing pin 41 from the pin hole 40 and rotates the support arm 31 upward from the state shown in FIG. Then, the position of the wheel 33 becomes higher, and the brake rod 35 slides in the proximal direction of the support arm 31 according to the long hole 36, and the contact between the brake rod 35 and the wheel 33 is released. In this state, the operator inserts the fixing pin 41 into the pin hole 40 and fixes the support arm 31. By doing so, the state shown in FIG. 3 is obtained again. In this state, the wheel 33 can freely rotate and move easily, which is suitable, for example, when the management machine 10 is returned from the field to the garage.

  As described above, the management machine 10 of the first embodiment is configured as follows. That is, the management machine 10 includes a wheel 33 behind the tillage unit 14 and is configured to be able to adjust the height of the wheel 33. In addition, the management machine 10 includes a resistance applying unit 50 that applies resistance to the rotation of the wheels 33. And this management machine 10 is comprised so that the resistance provision part 50 may act, if the height of the wheel 33 is adjusted to predetermined height (the lowest end of a stroke).

  With this configuration, at the time of tillage work, it is possible to easily adjust the traveling speed of the management machine 10 by adjusting the wheel 33 to the lowest position and causing the resistance applying unit 50 to act to generate resistance. Moreover, when moving the management machine 10 except at the time of tillage work, it can be moved in a state where resistance by the resistance applying unit 50 is not applied by setting the height of the wheel 33 to a position other than the lowest end. As described above, since switching between plowing and moving can be performed with a simple operation of adjusting the height of the wheels 33, various operations can be started immediately, and efficiency can be improved.

  Further, in the management machine 10 according to the present embodiment, the resistance applying unit 50 includes a link mechanism 59 including a brake link 34 and the like, and a brake rod 35. When the wheel 33 is adjusted to the lowermost position, the brake rod 35 is pressed against the wheel 33 by the link mechanism.

  With this configuration, the adjustment of the height of the wheel 33 and the switching of the application / release of resistance to the wheel 33 can be linked with a simple configuration using the link mechanism 59 and the brake rod 35.

  In the management machine 10 of the present embodiment, the link mechanism 59 includes a brake link 34. One end of the brake link 34 is connected to the rear portion of the airframe 20, and the other end is connected to the brake rod 35.

  With this configuration, the brake rod 34 is pushed against the rear portion of the machine body, so that the brake rod 35 is pressed against the wheel 33 and a strong resistance can be easily imparted.

  Further, in the management machine 10 of the present embodiment, the braking member that is pressed against the wheel 33 to apply the brake is configured as a brake rod 35.

  With this configuration, even if the link mechanism 59 (brake link 34) and the wheel 33 are arranged apart from each other as shown in FIG. 2, the braking member is configured as a rod-shaped brake rod 35. Can be reliably provided.

  Next, a second embodiment of the present invention will be described. FIG. 5 is an enlarged side view showing a state where the brake rod 35 is separated from the wheel 33 in the management machine of the second embodiment. In the following description, members that are the same as or similar to those in the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted.

  As shown in FIG. 5, in the management machine of this embodiment, a brake link (link member) 51 includes a first link 52 on the proximal end side and a second link 53 on the distal end side. The first link 52 and the second link 53 are connected to each other so as to be able to rotate, whereby the brake link 51 is configured to be bendable.

  The first link 52 is rotatably attached to the arm rotation shaft 32, and the second link 53 is connected to the tip side thereof. The brake rod 35 is connected to the second link 53 at the end opposite to the connection location with the first link 52 (in other words, the distal end side of the support arm 31).

  As in the first embodiment, the brake rod 35 is inserted into a long hole 36 provided in the support arm 31. Therefore, the brake rod 35 slides in the long hole 36 as the brake link 51 is bent and stretched.

  In the present embodiment, the link mechanism 60 that links the support arm 31 and the brake rod 35 includes a biasing spring (biasing member) 54 that is coupled to the brake link 51. The urging spring 54 urges the base end side first link 52 in a direction of rotating downward (in other words, a direction in which the brake link 51 is bent). A restriction member 57 that prevents the first link 52 from turning downward from a predetermined angle is provided on the support arm 31.

  A link stopper 55 is disposed at the rear of the machine body 20. The link stopper 55 is formed so as to appropriately protrude rearward, and is configured to prevent the first link 52 from rotating downward from a predetermined angle by contacting the first link 52. Has been.

  With the above configuration, in the state of FIG. 5, the brake link 51 is bent by the urging spring 54, and thus the brake rod 35 is separated from the wheel 33. When the support arm 31 is rotated downward from the state of FIG. 5, the first link 52 contacts the tip of the link stopper 55. When the support arm 31 is further rotated downward, the link stopper 55 pushes the first link 52 to relatively rotate upward, so that the brake link 51 extends. As a result, the brake rod 35 slides and moves in the direction of the distal end of the support arm 31 according to the long hole 36 and contacts the wheel 33 as shown in FIG. In the state of FIG. 6, resistance can be applied to the wheels 33 so as to resist the forward movement of the management machine 10, which is suitable for tillage work.

  On the other hand, when the support arm 31 is rotated upward from the state of FIG. 6, the push of the link stopper 55 against the first link 52 is released. As a result, the brake link 51 is bent again by the biasing spring 54, and the brake rod 35 is separated from the wheel 33. Since the wheel 33 rotates freely in this state, it is suitable when the management machine 10 is moved other than tillage work.

  As described above, the brake link 51 of the management machine according to the second embodiment is configured to be bendable, and the link mechanism 60 includes a biasing spring 54 that biases the brake link 51 in a bending direction.

  With this configuration, the application / release of resistance to the wheel 33 can be easily switched by interlocking the bending / extension of the brake link 51 and the pressing / release of the brake rod 35 with respect to the wheel 33. Moreover, since the brake link 51 is urged in the bending direction by the urging spring 54, the resistance to the wheel 33 can be easily released.

  Next, a modification of the second embodiment will be described. FIG. 7 is an enlarged side view showing a state in which the brake rod 35 is separated from the wheel 33.

  As shown in FIG. 7, in the management machine of this modification, one end of a wire 56 is connected to the first link 52. The other end of the wire 56 is connected to a resistance applying lever (operation member) (not shown) provided near the handle of the management machine.

  With the above configuration, in the state of FIG. 7, the height of the wheel 33 is adjusted to be slightly above the lowermost end, and the brake rod 35 is separated from the wheel 33. When the operator applies an operating force to the resistance applying lever from the state shown in FIG. 7, the first link 52 is pulled by the wire 56 and rotated upward, and as a result, the brake link 51 extends. Along with this, the brake rod 35 connected to the tip of the brake link 51 moves toward the tip of the support arm 31 according to the long hole 36 and contacts the wheel 33 to give resistance.

  On the other hand, when the operating force applied to the resistance applying lever by the operator is released, the brake link 51 returns to the bent state shown in FIG. 7 by the urging force of the urging spring 54, and the brake rod 35 is separated from the wheel 33. In this state, the wheel 33 can freely rotate.

  As described above, the management machine of this modification includes a resistance applying lever connected to the brake link 51 via the wire 56. And it is comprised so that the brake link 51 can be expanded by operating this resistance provision lever.

  With this configuration, if the height of the wheel 33 is adjusted to a predetermined height, resistance can be applied to the wheel 33 by operating the resistance applying lever. Therefore, for example, when a short distance movement of the management machine and a light tillage operation are repeated, it is efficient because the labor of adjusting the height of the wheels 33 can be saved. Furthermore, the brake force applied to the wheel 33 can be changed by the operator adjusting the operating force applied to the resistance applying lever.

  The preferred embodiments and modifications of the present invention have been described above. However, instead of the above configuration, for example, the following configuration may be used.

  In the management machine of the above embodiment, two wheels 33 are provided on the left and right sides of the machine body 20. However, instead of this configuration, only one drum-like wheel may be provided at the center of the machine body. In this case, it is preferable to form an appropriate groove on the outer peripheral surface of the drum-shaped wheel so that the field after tilling by the tilling unit 14 is not compressed.

  In the above embodiment, the rod member (brake rod 35) is used as the braking member. However, instead of this configuration, the braking member can be configured as a brake pad, for example.

  Instead of the configuration in which the brake rod 35 directly contacts the wheel 33, the brake rod 35 can be changed so as to contact an appropriate member (for example, a disk member) that rotates integrally with the wheel 33. .

  In 2nd Embodiment (FIG. 5), it can also comprise so that the back protrusion amount of the link stopper 55 can be changed. In this configuration, the height at which resistance is imparted to the rotation of the wheel 33 can be changed by changing the protrusion amount of the link stopper 55.

  The urging spring 54 in the second embodiment can be changed so as to be attached so as to apply an urging force in a direction in which the urging spring 54 is extended rather than in a direction in which the brake link 51 is bent. In this case, if the wheel 33 is positioned at a predetermined height (including the lowermost end), the brake rod 35 can be pressed against the wheel 33 by the force of the biasing spring 54 to provide resistance to the wheel 33. it can. Further, even when the wheel 33 or the like is worn out due to long-term use, it is possible to reliably impart resistance to the wheel 33.

  Similarly, in the modified example (FIG. 7) of the second embodiment, the urging spring 54 can be changed so as to apply an urging force in a direction in which the brake link 51 is extended. Further, when an operating force is applied to the resistance applying lever, the wire 56 can be changed to bend the brake link 51.

  In the configuration of FIG. 7, the first link 52 and the resistance applying lever can be connected via, for example, a link instead of the wire 56. Moreover, it can replace with a resistance provision lever and can be changed into a rod or a pedal-type operation member.

  In the configuration of FIG. 7, the link stopper 55 can be omitted. In this case, resistance application / release to the wheel 33 is switched only by operating the resistance application lever.

The side view of the management machine which concerns on 1st Embodiment of this invention. The rear view of the management machine of 1st Embodiment. In the management machine of a 1st embodiment, the expansion side view showing the state where the braking member has separated from the wheel. The expanded side view which shows the state which adjusted the wheel to the position of the lowest end. In the management machine of 2nd Embodiment, the enlarged side view which shows the state which the braking member has spaced apart from the wheel. The expanded side view which shows the state which adjusted the wheel to the position of the lowest end. The expansion side view which shows the modification of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Management machine 11 Engine 12 Mission case 13 Axle 14 Tillage part 15 Fuel tank 16 Handle 17 Handle frame 20 Airframe 31 Support arm 32 Arm rotation shaft 33 Wheel 34 Brake link (link member)
35 Brake rod (braking member)
36 long hole 40 pin hole 41 fixing pin 50 resistance applying portion (braking means)
59 Link mechanism

Claims (6)

In the axle work type management machine with the tillage part,
A wheel is provided behind the tillage part, and the height of the wheel is configured to be adjustable,
Comprising braking means for imparting resistance to rotation of the wheel,
The management machine is configured such that the braking means acts when the height of the wheel is adjusted to a predetermined height. The management machine according to claim 1,
The braking means includes a link mechanism and a braking member,
When the height of the wheel is adjusted to a predetermined height, the management device is configured so that the brake member is pressed against the wheel and acts by the link mechanism. The management machine according to claim 2,
The link mechanism includes a link member;
One end of the link member is connected to the rear part of the machine body, and the other end is connected to the braking member. The management machine according to claim 3,
The management device according to claim 1, wherein the braking member is a rod member. The management machine according to claim 3 or 4,
The link member is configured to be bendable,
The link mechanism includes a biasing member that biases the link member in a bending direction. The management machine according to claim 5,
An operation member connected to the link member;
A management machine characterized in that the link member can be extended by operating the operation member.

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