JP5207872B2 - snowblower - Google Patents

Description

  The present invention relates to a snow removal machine of a type that includes a snow removal part and a traveling part and is operated by a driver walking with the airframe behind the airframe.

  The snow removal machine is a working machine of a type that removes snow by a snow removal unit provided in front of the machine body, and advances, stops, and reverses the traveling unit by an operation of a driver walking with the machine body behind the machine body. In such a snowplow, a rear object detection member is provided at the rear of the fuselage to stop the snowplow when the rear of the fuselage contacts the driver during reverse travel.

Conventionally, various snowplows having a rear object detection member at the rear of the machine have been proposed (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2005-307507 (FIGS. 1 and 2)

  As shown in FIG. 1 of Patent Document 1, the snow removal machine 10 collects snow in the center with an auger 31 provided in front of the machine body 11, accelerates the collected snow with a blower 32, and discharges it from the shooter 34. The work machine is operated by a driver Mn walking with the machine body 11 behind the machine body 11. As shown in FIG. 2 of Patent Document 1, the driving force generated by the engine 14 is generated by the first belt transmission mechanism 52, the traveling clutch 53, the intermediate shaft 54, the second belt transmission mechanism 55, and the transmission. 56, the traveling bodies 20 and 20 are transmitted to the traveling bodies 20 and 20, so that the traveling bodies 20 and 20 can be advanced, stopped, and moved backward by operating the speed change lever 57 connected to the speed change operation arm 56c of the transmission 56. it can.

  In addition, when the rear object detection member 120 contacts the driver while the traveling bodies 20 and 20 are moving backward, an ON signal is sent from the rear object detection switch 125 that detects the movement of the rear object detection member 120 to the control unit 43. Sent. Upon receiving this ON signal, the control unit 43 disconnects the traveling clutch 53 and stops the traveling bodies 20 and 20. Next, when the driver manually tilts the shift lever 57 to the forward side, the shift operation arm 56c of the transmission 56 switches to the forward side, and the controller 43 is turned on from the forward switch 59 that detects the movement of the shift lever 57. A signal is sent. Upon receiving this ON signal, the control unit 43 operates the traveling clutch 53 to move the traveling bodies 20 and 20 forward. This eliminates the contact between the rear of the fuselage and the driver.

By the way, in the snow removal machine 10 of patent document 1, it is essential that a driver | operator performs forward operation.
However, there may be a case where the driver cannot perform the forward operation due to the driver's panic, or a delay even if it is possible. In this case, since the rear part of the fuselage remains in contact with the driver, it takes time for the driver to escape, which is not preferable.

  Therefore, it is required to develop a snowplow that can be rapidly advanced after stopping due to rear contact.

  This invention makes it a subject to provide the snow remover which can be advanced rapidly after the stop by back contact.

  In the invention according to claim 1, the hydraulic transmission is rotated by a driver who rotates the snow removal unit with a power source mounted on the airframe, rotates the input shaft of the hydraulic transmission, and walks with the airframe behind the airframe. In a snowplow of a type in which a traveling unit provided in the machine body is advanced, stopped, and moved backward by an output shaft of the machine, the snowplow includes a traveling clutch that connects and disconnects a driving force between the power source and the hydraulic transmission. An object detection member that detects an object in contact with an object at a rear portion of the airframe, and generates a command to disengage the travel clutch when the object detection member detects an object; Generate a command to switch the mode to forward, then generate a command to connect the travel clutch, and generate a command to disconnect the travel clutch when the travel clutch has been connected for a predetermined period of time. Characterized in that it comprises a control unit.

  In the invention according to claim 1, the control unit generates a command to disconnect the traveling clutch when the object detection member detects an object, generates a command to switch the mode of the hydraulic transmission to forward, A command to connect the travel clutch is generated, and when the travel clutch is connected for a predetermined time, a command to disconnect the travel clutch is generated, so that the driver does not need to perform a manual operation after contacting the object detection member. Therefore, even if it is difficult for the driver to operate the snowplow after stopping due to back contact due to various circumstances, the snowplow can be advanced quickly.

  That is, according to Claim 1, the snow remover which can be advanced rapidly after the stop by back contact can be provided.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a snowplow according to the present invention, and before, after, above and below, directions as viewed from the driver are shown.

  The snowplow 10 includes, for example, a crawler type traveling unit 13 that is provided on the body 11 and travels on the snow 12, an engine 14 that is provided above the body 11 and generates a driving force, for example, and a front portion of the body 11. A snow removal part housing 15 attached to the snow removal part housing 15 is provided in front of the snow removal part housing 15 and is connected to the engine 14 via a first belt type transmission part 16, a blower shaft 17, a gear case 18 and an auger shaft 19. An auger 21 that collects snow in the center, a blower 22 that is attached to the blower shaft 17 and accelerates the snow collected by the auger 21, and a snow that is pivotally attached to the top of the snow removal unit housing 15 and that is accelerated by the blower 22 is discharged. A shuter 23, a cover 24 attached to the upper part of the body 11 and covering the engine 14, and an operating device provided at the rear part of the cover 24 An operation panel 25 provided therein, a forward / reverse switching lever 26 that can be switched to the operation panel 25 to select forward, stop, or reverse of the traveling unit 13; and an operation handle that is provided at the rear end of the cover 24 and is gripped by the driver 27. 28, an auxiliary lever 29 that is swingably provided at the rear end of the cover 24 and is gripped by the driver 27 together with the operation handle 28, and a contact of the driver 27 as an object that is movably provided at the rear end of the cover 24. An object detection member 31 that is connected to the engine 14, and a travel clutch 34 that is provided between the second belt-type transmission unit 32 connected to the engine 14 and the intermediate shaft 33 that is rotatably provided on the machine body 11. A hydraulic transmission 40 (described in detail later) that transmits a driving force that is provided on the body 11 and is transmitted from the intermediate shaft 33 via the third belt transmission unit 35 to the traveling unit 13; A control unit 60 (described later in detail) is provided below the panel 25 and generates a command to the traveling clutch 34, the hydraulic transmission 40, and the like, and is operated by a driver 27 who walks with the airframe 11 behind the airframe 11. It is a work machine.

  Reference numeral 61 denotes a drive wheel, 62 an idler wheel, 63 a lower roller, 64 a crawler belt, 65 a housing drive, 66 a shooter drive, 67 a sled, and 68 a parking brake lever.

  2 is a view taken along the line 2-2 in FIG. 1, and the hydraulic transmission 40 includes a switching operation unit 41. The switching operation unit 41 includes a switching motor 42 and an output shaft 43 of the switching motor 42. , A driven gear 45 meshing with the drive gear 44, a link 47 attached to a driven shaft 46 of the driven gear 45, a tip of the link 47, and a hydraulic transmission It consists of rods 51 each connecting the tip of 40 speed change levers 48 via pins 49. 52 is an input shaft of the hydraulic transmission, and 53 is an output shaft of the hydraulic transmission.

  When the switching motor 42 is activated, the drive gear 44 rotates as indicated by arrow (1), and the driven gear 45 also rotates as indicated by arrow (2). At the same time, the link 47 swings around the center point P1 of the driven shaft 46 as shown by the arrow (3), so that the rod 51 moves as shown by the arrow (4). As a result, the gear change lever 48 is switched from the reverse mode indicated by the solid line to the forward mode indicated by the two-dot chain line. There is a neutral mode indicated by a two-dot chain line between the reverse mode and the forward mode. In this mode, the traveling unit (reference numeral 13 in FIG. 1) is stopped.

  Therefore, when the hydraulic transmission 40 is in the forward mode, the output shaft 53 is rotated forward as indicated by arrows (5) and (5), so that the traveling unit (reference numeral 13 in FIG. 1) can move forward. Further, in the reverse mode, the output shaft 53 is reversely rotated as indicated by arrows (6) and (6), so that the traveling unit can reverse.

  3 is a drive system diagram of the snowplow according to the present invention. The drive system 70 includes an auger power transmission mechanism 71 and a travel power transmission mechanism 72. The auger power transmission mechanism 71 is a first output shaft of the engine 14. 73, a first belt-type transmission portion 16 attached to 73, a blower shaft 17 connected to the first belt-type transmission portion 16, a gear case 18 connected to the blower shaft 17, and a gear case 18 This is a mechanism that includes a connected auger shaft 19 and transmits a driving force generated by the engine 14 to the blower 22 and the auger 21.

  The traveling power transmission mechanism 72 includes a second belt transmission unit 32 attached to the second output shaft 74 of the engine 14 and a driving force transmitted from the engine 14 connected to the second belt transmission unit 32. A drive clutch generated by the engine 14, the intermediate shaft 33 coupled to the travel clutch 34, and a third belt type transmission unit 35 coupled to the intermediate shaft 33. This is a mechanism for transmitting force to the hydraulic transmission 40 and the traveling units 13 and 13.

  The rotary displacement sensor 75 detects the amount of movement of the forward / reverse switching lever 26 by an operation like the arrow of the forward / reverse switching lever 26 and sends a signal to the control unit 60. Specifically, when the forward / reverse switching lever 26 is set to the forward mode, the rotary displacement sensor 75 issues a forward signal to the control unit 60, and upon receiving this signal, the control unit 60 issues a forward command to the switching motor 42. By starting the switching motor 42, the hydraulic transmission 40 enters the forward mode.

  Further, when the forward / reverse switching lever 26 is set to the neutral mode, the rotary displacement sensor 75 issues a neutral signal to the control unit 60, and the control unit 60 issues a neutral command to the switching motor 42 in response to this signal. Further, when the forward / reverse switching lever 26 is set to the reverse mode, the rotary displacement sensor 75 issues a reverse signal to the control unit 60, and in response to this signal, the control unit 60 issues a reverse command to the switching motor 42.

  That is, the control unit 60 receives any one of the forward, stop, and reverse signals issued from the rotary displacement sensor 75 by the operation of the forward / reverse switching lever 26, and causes the hydraulic transmission 40 to move forward, stop, or reverse. By issuing such a command, the traveling units 13, 13 can be moved forward, stopped, or moved backward.

  An object detection switch 76 is provided in front of the object detection member 31, and the object detection switch 76 moves the object detection member 31 forward (downward diagonally to the left in the figure), so that the driver can move to the object detection member 31. Detects contact.

77 is an auger clutch, 78 is an auger clutch drive unit, 79 is a side clutch, 81 is a solenoid, 82 is a forward switch, 83 is an auxiliary switch, 84 is a parking brake switch, 85 is an auger switch, and 86 is an ignition key switch. is there.
Next, the operation of the snow removal machine 10 having the above configuration will be described using an operation flow.

  FIG. 4 is an operation flowchart of the snowplow according to the present invention. In step (hereinafter referred to as ST) 01, the forward / reverse switching lever is set to the reverse mode. Specifically, as shown in FIG. 3, if the forward / reverse switching lever 26 is in the position (7), the reverse mode is selected, and the traveling units 13 and 13 move backward as indicated by arrows (8) and (8).

  In ST02, the object comes into contact with the object detection member. Specifically, as shown in FIG. 3, when the traveling unit 13 is moving backward, the driver contacts the object detection member 31 and pushes the object detection member 31 as indicated by an arrow (9).

  In ST03, the object detection switch issues an ON signal. Specifically, as shown in FIG. 3, the detection unit 87 of the object detection switch 76 is pushed by the object detection member 31 as indicated by an arrow (10). Thus, the object detection member 31 has detected the driver, and the object detection switch 76 sends an ON signal to the control unit 60 as indicated by a broken line (11).

  In ST04, the travel clutch is turned off (disconnected). Specifically, as shown in FIG. 3, an off (disconnection) command is issued from the control unit 60 to the traveling clutch 34 as indicated by a broken line (12). That is, the control unit 60 generates a command to disconnect the travel clutch 34 and stops the reverse travel of the travel unit 13.

  In ST05, the switching motor is turned on. Specifically, as shown in FIG. 3, the controller 60 issues an ON command to the switching motor 42 as indicated by a broken line (13) to start the switching motor 42. As a result, the shift switching lever 48 of the hydraulic transmission 40 switches from the reverse mode to the forward mode as indicated by the arrow (14), so that the hydraulic transmission 40 enters the forward mode. That is, the control unit 60 generates a command for switching the mode of the hydraulic transmission 40 to forward.

  In ST06, the travel clutch is turned on (connected). Specifically, as shown in FIG. 3, the controller 60 issues an on (connection) command to the travel clutch 34 as indicated by a broken line (15). That is, the control unit 60 generates a command to connect the traveling clutch 34, and moves the traveling unit 13 forward as indicated by arrows (16) and (16).

  In ST07, it is confirmed whether or not a predetermined time of 3 seconds or more has elapsed, and if YES, the process proceeds to ST08 if YES, and returns to ST07 if NO.

  In ST08, the travel clutch is turned off (disconnected). Specifically, as shown in FIG. 3, an off (disconnection) command is issued from the control unit 60 to the traveling clutch 34 as indicated by a broken line (17). That is, the control unit 60 generates a command to disconnect the travel clutch 34. This stops the traveling unit 13 from moving forward.

  In ST09, the neutral mode is set. Specifically, as shown in FIG. 3, the controller 60 issues an off command to the switching motor 42 as shown by a broken line (18), and the shift switching lever 48 of the hydraulic transmission 40 is moved from the forward mode to the position (19). Switch to. Thus, the hydraulic transmission 40 is in the neutral mode.

  In FIG. 3, when the object detection member 31 detects a driver as an object, the control unit 60 generates a command to disconnect the travel clutch 34 and generates a command to switch the mode of the hydraulic transmission 40 to forward. Next, a command to connect the traveling clutch 34 is generated, and when the traveling clutch 34 has been connected for a predetermined time, a command to disconnect the traveling clutch 34 is generated. Therefore, after the driver contacts the object detection member 31, There is no need for manual operation. Therefore, even if it is difficult for the driver to operate the snowplow 10 after stopping due to rear contact due to various circumstances, the snowplow 10 can be advanced quickly.

  Therefore, the snow removal machine 10 which can be advanced rapidly after the stop by back contact can be provided.

  In the snowplow 10 described so far, a gear group is used for the switching operation portion of the shift switching lever. Since the gear group has backlash, there is a time difference from the start of the motor to the start of the operation of the gear change lever. Such a time difference makes the driver feel uncomfortable and thus reduces the drivability of the snowplow. Further, since the snow removal machine 10 uses the switching motor every time the mode is switched, the use frequency of the switching motor has increased. For this reason, the life of the switching motor may be shortened. Therefore, a technique that can improve drivability and extend the life of the switching motor will be described below.

  FIG. 5 is a diagram showing a modified embodiment of FIG. 2, and the description of the same structure as in FIG. In addition, before, after, left, and right are described as viewed from the driver side, the left side of the figure is front, right is rear, the lower side is left, and the upper side is right.

  The front end 91 of the speed change lever 90 is provided on the hydraulic transmission 40B so as to be rotatable, for example, in the horizontal direction, and the rear end 92 of the speed change lever 90 is rotatably connected to a lever driving mechanism 100 (described later in detail). Has been. Further, the rear end 92 of the shift switching lever 90 is connected to a forward / reverse switching lever 160 (detailed later) provided rotatably on a case 151 on the rear right side of the airframe via a first coupling mechanism 130 (detailed later). Yes.

  6 is a cross-sectional view taken along line 6-6 of FIG. 5. The lever driving mechanism 100 includes a switching motor 101 attached to the case 151 of the fuselage, for example, in an upright position, and a transmission unit 102 (details will be described later). ) And a first shaft 104 that is supported by a bearing portion 103 attached to the case 151 of the machine body and extends upward in the drawing, and a rear end 93 is attached to the upper end of the first shaft 104. It is comprised with the 2nd connection part 105 (detailed later).

  The transmission unit 102 is supported on the upper surface of the stepped portion 107 of the first shaft 104 through the first shaft 104 that is meshed with the drive gear 106 attached to the output shaft of the switching motor 101. Intermediate gear 108, an arm 109 extending to the left from the side surface of the stepped portion 107 of the first shaft 104, and a fastening portion 111 (detailed later) is attached to the tip of the arm 109 and meshes with the intermediate gear 108. And the driven gear 112.

  In addition, the fastening portion 111 is placed on the friction plates 113 and 113 that are in contact with the upper and lower surfaces of the driven gear 112, the washers 114 and 114 that hold the friction plates 113 and 113, and the upper washer 114. The friction plate 113, 113 is made up of a countersink part 115, which is configured by four countersunk springs in series, a washer 116, a bolt 117, a set nut 118, and a nut 119. The bolt 117, When the retaining nut 118 and the nut 119 are tightened with a prescribed tightening torque, and the torque below the prescribed value acts on the driven gear 112, the driven gear 112 is pressed by the friction plates 113, 113 and does not rotate, and the driven gear 112 does not rotate. The fixed gear 112 is configured so that the driven gear 112 slides on the surfaces of the friction plates 113 and 113 to rotate when a torque exceeding a specified value is applied. A torque clutch.

  That is, in the fastening portion 111, the switching motor 101 is started using a generation source that generates torque below the specified value, and the switching motor 101 is started, and torque is transmitted from the switching motor 101 to the driven gear 112 via the drive gear 106 and the intermediate gear 108. Then, the driven gear 112 does not rotate. On the other hand, when the second connecting portion 105, the first shaft 104, and the arm 109 are rotated by causing the generation source to generate a torque exceeding the specified value by the movement of the second connecting portion 105 in the front and back direction, the driven gear 112 is Rotate. 121 is a stopper. Next, the operation of the lever driving mechanism 100 configured as described above will be described.

  FIG. 7 is an operation diagram of the lever driving mechanism according to the present invention, and (a) corresponds to a sectional view taken along line 7a-7a in FIG. When the switching motor 101 is activated to rotate forward and the drive gear 106 is rotated as indicated by the arrow (20), the intermediate gear 108 is rotated as indicated by the arrow (21) and the driven gear 112 is engaged with the intermediate gear 108. Move as shown by arrow (22). At the same time, the arm 109 connected to the driven gear 112 via the bolt 117 also moves, so that the first shaft 104 rotates as indicated by an arrow (23). As a result, the driven gear 112 and the arm 109 move, for example, to the position indicated by the two-dot chain line below the position indicated by the solid line.

  Further, when the switching motor 101 is started and rotated reversely and the drive gear 106 is rotated as indicated by the arrow (24), the intermediate gear 108 is rotated as indicated by the arrow (25) and the driven gear 112 is engaged with the intermediate gear 108. Move as shown by arrow (26). At the same time, the arm 109 connected to the driven gear 112 via the bolt 117 also moves, so that the first shaft 104 rotates as indicated by an arrow (27). As a result, the driven gear 112 and the arm 109 move, for example, to the position indicated by the two-dot chain line above the position indicated by the solid line.

  (B) corresponds to a view taken in the direction of the arrow 7b in FIG. Rotate like so. At the same time, since the arm 109 is provided on the first shaft 104, the arm 109 moves as indicated by an arrow (30) and the driven gear 112 rotates as indicated by an arrow (31). As a result, the second connecting portion 105 and the driven gear 112 move to a position indicated by a two-point difference line above the position indicated by a solid line, for example.

  When the second connecting portion 105 is pushed as indicated by an arrow (32) while the switching motor 101 is stopped, the first shaft 104 rotates as indicated by an arrow (33). At the same time, the arm 109 moves as indicated by an arrow (34) and the driven gear 112 rotates as indicated by an arrow (35). As a result, the second connecting portion 105 and the driven gear 112 are moved to a position indicated by a two-point difference line below the position indicated by a solid line, for example.

  Therefore, the lever driving mechanism 100 can rotate the first shaft 104 by forward or reverse rotation of the switching motor 101 as shown in (a), and has stopped the switching motor 101 as shown in (b). The first shaft 104 can be rotated by pushing the second connecting portion 105 in the state.

  FIG. 8 is an exploded perspective view of the first connecting mechanism according to the present invention. The first connecting mechanism 130 is rotatably attached to the lower end 131 of the forward / reverse switching lever 160 and has an elongated hole 132 formed in the vertical direction of the figure. An L-shaped connecting member 134 having an elongated hole 133 formed in an oblique direction and seen from the side, and an upper link 135 and an upper link rotatably attached to the elongated hole 133 of the connecting member 134 135 includes a cylindrical connecting member 136 extending downward from 135 and a lower link 137 extending obliquely downward to the left from the connecting member 136, and shifts into a slot 138 of the lower link 137. A rear end 92 of the switching lever 90 and a front end 139 of a second connecting portion 105 (described later in detail) are rotatably attached, and an L-shaped connecting member 141 viewed from above, and a connecting member for the connecting member 141 Plugged into 36 comprising a cylindrical support member 142 for rotatably supporting the connecting member 141 is a mechanism that is configured for example by a plurality of members.

  In addition, the second connecting portion 105 is rotatably connected to the lever 143 attached to the upper end of the first shaft (reference numeral 104 in FIG. 6) and the front end 144 of the lever 143, and the tip 139 is connected to the connecting member 141. A rod 145 is rotatably connected to the lower link 137 and the rear end 92 of the speed change lever 90. Reference numeral 146 denotes a bolt, 147 denotes a nut, and 148 denotes a grip portion.

  FIG. 9 is a perspective view of the lever driving mechanism and the first coupling mechanism according to the present invention. When the ignition key switch 171 as a power switch is turned on, for example, the control unit 170 turns the second axis of the forward / reverse switching lever 160. When a forward signal is received from the rotary displacement sensor 173 connected to the switch 172, a forward rotation command is generated to the switching motor 101, and when a reverse signal is received from the rotary displacement sensor 173, a reverse rotation command is generated to the switching motor 101. It is. 174 is a support material, 175 is a bearing portion, and 176 is an operation ready lamp.

  The control unit 170 is a device that controls each part of the snowplow similar to the above-described control unit (reference numeral 60 in FIG. 3). In the following description, the switching motor 101, the ignition key switch 171 and the rotary displacement sensor are used. 173, only the exchange of signals with the operation preparation completion lamp 176 will be described, and description of other controls will be omitted.

  When the driver moves the forward / reverse switching lever 160 in the neutral position forward (left side in the figure) as indicated by an arrow (36) while the switching motor 101 is stopped, the connecting member 134 and the upper link 135 of the connecting member 141 are moved. The lower link 137 of the connecting member 141, the rear end 92 of the speed change switching lever 90, and the front end 139 of the second connecting portion 105 are moved obliquely upward to the left. The mode of the hydraulic transmission 40B can be changed from neutral to forward by manual operation by the driver as described above.

  Further, when the forward / reverse switching lever 160 in the neutral position is tilted backward (right side in the figure) as indicated by an arrow (37) with the switching motor 101 stopped, the upper link of the connecting member 134 and the connecting member 141 is obtained. 135 moves to the left in the figure, and the lower link 137 of the connecting member 141, the rear end 92 of the speed change lever 90, and the front end 139 of the second connecting portion 105 move obliquely downward to the right. The mode of the hydraulic transmission 40B can be changed from neutral to reverse by manual operation by the driver as described above.

  Therefore, the lever driving mechanism 100 is configured such that the first shaft 104 and the second connecting portion 105 are stopped with respect to the stationary transmission portion 102 when the driver stops the rotation of the switching motor 101 and manually operates the forward / reverse switching lever 160. Since it is configured to rotate, when the driver manually operates the forward / reverse switching lever 160 to select one of the forward mode, neutral mode, and reverse mode, the mode of the hydraulic transmission 40B is advanced, You can switch to either neutral or reverse.

  In addition, the rear end 92 of the speed change lever 90 is connected to the forward / reverse change lever 160 via the first connecting mechanism 130 and the front end 91 is rotatably provided to the hydraulic transmission 40B. When the driver manually operates the switching lever 160, the shift switching lever 90 operates immediately. Therefore, the time from the operation of the forward / reverse switching lever to the operation of the shift switching lever can be shortened as compared with the method of operating the shift switching lever by a command from the control unit based on the operation of the forward / reverse switching lever. Thereby, the drivability of the snowplow can be improved.

  Next, with the forward / reverse switching lever 160 in the forward position (38), when the switching motor 101 is started and rotated forward as indicated by the arrow (39), the second connecting portion 105 is indicated by the arrow (40). , The shift switching lever 90 and the lower link 137 of the connecting member 141 are moved as indicated by the arrow (41), the upper link 135 and the connecting member 134 of the connecting member 141 are moved as indicated by the arrow (42), The forward / reverse switching lever 160 moves as indicated by an arrow (43). By driving the switching motor 101 as described above, the forward / reverse switching lever 160 in the forward position (38) can be moved to the neutral position (44).

  Further, when the switching motor 101 is started and rotated reversely as indicated by an arrow (46) with the forward / reverse switching lever 160 being set to the reverse position (45), the second connecting portion 105 moves as indicated by an arrow (47). Then, the gear change lever 90 and the lower link 137 of the connecting member 141 move as indicated by an arrow (48), and the upper link 135 and the connecting member 134 of the connecting member 141 move as indicated by an arrow (49), and move forward and backward. The switching lever 160 moves as indicated by the arrow (50). By driving the switching motor 101 as described above, the forward / reverse switching lever 160 which has been in the reverse position (45) can be moved to the neutral position (51).

  Therefore, the speed change lever 90 can be pushed and pulled by rotating the first shaft 104 and the second connecting portion 105 by forward or reverse rotation of the motor. Therefore, the mode of the hydraulic transmission 40B can be returned from forward or reverse to neutral, and the forward / reverse switching lever 160 at the forward or reverse position can be returned to the neutral position.

  In addition, the switching motor 101 of the lever driving mechanism 100 is stopped when the driver manually operates the forward / reverse switching lever 160, and only when the shift switching lever 90 is returned from the forward mode or the reverse mode to the neutral mode. Since it was made to reverse, it is a stop state in normal operation of a snowblower. Therefore, the life of the switching motor can be extended compared to the case where the switching motor is always operated.

  By the way, the forward / reverse switching lever 160 is a lever that can be operated regardless of whether the ignition key switch 171 is on or off, and the driver or the like moves the forward / reverse switching lever 160 to the forward position or reverse before starting the operation of the snowplow. Sometimes it switches to the wrong position. When the ignition key switch 171 is turned on while the traveling clutch is turned on while the forward / reverse switching lever 160 is in the forward position or the reverse position, the snowplow suddenly starts forward or backward. Next, the operation of the snowplow that can prevent such sudden start will be described.

  FIG. 10 is an operation diagram of the lever driving mechanism and the first coupling mechanism until the mode is switched from the forward mode to the neutral mode. As shown in FIG. 10A, the control unit 170 sends the ON signal of the ignition key switch 171 to the broken line (52 ) And a forward signal from the rotary displacement sensor 173 is received as indicated by a broken line (53), a forward rotation start command is issued to the switching motor 101 as indicated by a broken line (54).

  As a result, the switching motor 101 moves the shift switching lever 90 as indicated by an arrow (55) via the transmission portion 102 and the second connecting portion 105, and the forward / reverse switching lever 160 via the connecting member 141 and the connecting member 134. Is moved as shown by the arrow (56).

  As a result, as shown in (b), the shift switching lever 90 and the forward / reverse switching lever 160 are switched to the neutral mode. At this time, when receiving a neutral signal such as a broken line (57) from the rotary displacement sensor 173, the control unit 170 issues a stop command to the switching motor 101 as indicated by a broken line (58). Further, a command is issued to the operation preparation completion lamp 176 as indicated by a broken line (59), and the operation preparation completion lamp 176 is turned on.

  The lever driving mechanism 100 pulls the shift switching lever 90 by rotating the first shaft 104 and the second connecting portion 105 by the forward rotation of the switching motor 101, stops the rotation of the switching motor 101, and the driver moves the forward / reverse switching lever. The first shaft 104 and the second connecting portion 105 are configured to rotate with respect to the stationary transmission portion 102 when the 160 is manually operated. Further, the controller 170 is configured to issue a forward rotation command to the switching motor 101 when the ignition key switch 171 is turned on and the forward / reverse switching lever 160 is in the forward position.

  Therefore, even if the driver or the like accidentally switches the forward / reverse switching lever 160 to the forward position before turning on the ignition key switch 171, when the driver turns on the ignition key switch 171, the control unit 170 switches to the switching motor 101. The forward / reverse switching lever 160 in the forward position can be returned to the neutral position by the forward rotation command. Such a snowplow does not start suddenly forward when the ignition key switch 171 is turned on and the traveling clutch is connected. Since the driver does not drive unexpectedly, an easy-to-use snowplow can be realized.

  FIG. 11 is an operation diagram of the lever driving mechanism and the first coupling mechanism until the reverse mode is switched to the neutral mode. As shown in FIG. 11A, the control unit 170 sends the ON signal of the ignition key switch 171 to the broken line (60 ) And a reverse signal from the rotary displacement sensor 173 is received as indicated by a broken line (61), a reverse rotation start command is issued to the switching motor 101 as indicated by a broken line (62).

  Accordingly, the switching motor 101 moves the shift switching lever 90 as indicated by an arrow (63) via the transmission portion 102 and the second connecting portion 105, and the forward / reverse switching lever 160 via the connecting member 141 and the connecting member 134. Is moved as shown by the arrow (64).

  As a result, as shown in (b), the shift switching lever 90 and the forward / reverse switching lever 160 are switched to the neutral mode. At this time, when receiving a neutral signal such as a broken line (65) from the rotary displacement sensor 173, the control unit 170 issues a stop command to the switching motor 101 as indicated by a broken line (66). Further, a command is issued to the operation preparation completion lamp 176 as indicated by a broken line (67), and the operation preparation completion lamp 176 is turned on.

  The lever drive mechanism 100 rotates the first shaft 104 and the second connecting portion 105 by reversing the switching motor 101 to push the shift switching lever 90 and stop the rotation of the switching motor 101 so that the driver can move the forward / reverse switching lever 160. The first shaft 104 and the second connecting portion 105 are configured to rotate with respect to the transmission unit 102 in a stationary state when the is manually operated. Further, the controller 170 is configured to issue a reverse rotation command to the switching motor 101 when the ignition key switch 171 is turned on and the forward / reverse switching lever 160 is in the reverse position.

  Therefore, even if the driver or the like mistakenly switches the forward / reverse switching lever 160 to the reverse position before turning on the ignition key switch 171, if the driver turns on the ignition key switch 171, the control unit 170 switches to the switching motor 101. , The forward / reverse switching lever 160 in the reverse position can be returned to the neutral position. Such a snowplow does not start suddenly backward when the ignition key switch 171 is turned on and the travel clutch is connected. Since the driver does not drive unexpectedly, an easy-to-use snowplow can be realized.

  FIG. 12 is an operation flowchart of the snowplow provided with the lever driving mechanism and the first coupling mechanism. In ST21, it is confirmed whether or not the forward / reverse switching lever is in the neutral position. If YES, the process proceeds to ST22. If NO, the process proceeds to ST31 (see FIG. 13). Specifically, as shown in FIG. 10B, when the control unit 170 receives a neutral signal such as a broken line (57) from the rotary displacement sensor 173, an operation preparation completion lamp 176 as indicated by a broken line (59). The operation ready lamp 176 is turned on.

In ST22, the forward / reverse switching lever is set to the reverse mode.
In ST23, the object comes into contact with the object detection member.
In ST24, the object detection switch issues an ON signal.

In ST25, the travel clutch is turned off (disconnected).
In ST26, the switching motor is turned on. Specifically, as shown in FIG. 9, the switching motor 101 is rotated reversely as indicated by an arrow (46) in response to a command from the controller 170, and the shift switching lever 90 is moved to the position (68). The hydraulic transmission 40B is now in the forward mode.

In ST27, the travel clutch is turned on (connected). The snowplow begins to advance.
In ST28, it is confirmed whether or not a predetermined time of 3 seconds or more has elapsed, and if YES, the process proceeds to ST29 if YES, and returns to ST28 if NO.

In ST29, the travel clutch is turned off (disconnected).
In ST30, the neutral mode is set. Specifically, as shown in FIG. 9, in accordance with a command from the control unit 170, the switching motor 101 is rotated forward as indicated by an arrow (39), and the speed change lever 90 is indicated by a solid line as indicated by an arrow (41). Return to. The hydraulic transmission 40B is now in the neutral mode.

  FIG. 13 is a flowchart for preparing the operation of the snowplow having the lever driving mechanism and the first coupling mechanism. In ST31, it is confirmed whether or not the forward / reverse switching lever is in the forward position. If YES, the process proceeds to ST32. If NO, the process proceeds to ST35. Specifically, as shown in FIG. 10A, the control unit 170 confirms reception of a forward signal such as a broken line (53) from the rotary displacement sensor 173.

  In ST32, the forward rotation of the switching motor is started. Specifically, as shown in FIG. 10A, the controller 170 issues a forward rotation start command to the switching motor 101 as indicated by a broken line (54) to start the forward rotation of the switching motor 101.

  In ST33, it is confirmed whether or not the forward / reverse switching lever is in the neutral position. If YES, the process proceeds to ST34, and if NO, the process returns to ST33. Specifically, as shown in FIG. 10B, the control unit 170 confirms reception of a neutral signal such as a broken line (57) from the rotary displacement sensor 173.

  In ST34, the switching motor is stopped. Specifically, as shown in FIG. 10B, a stop command is issued from the control unit 170 to the switching motor 101 as indicated by a broken line (58) to stop the switching motor 101. Since the forward / reverse switching lever 160 is in the neutral mode, the operation preparation is completed (see reference B and reference B in FIG. 12).

  In ST35, it is confirmed whether or not the forward / reverse switching lever is in the reverse position. If YES, the process proceeds to ST36, and if NO, the process is ended. Specifically, as shown in FIG. 11A, the control unit 170 confirms reception of a reverse signal such as a broken line (61) from the rotary displacement sensor 173.

  In ST36, the reverse rotation of the switching motor is started. Specifically, as shown in FIG. 11A, the controller 170 issues a reverse rotation start command to the switching motor 101 as indicated by a broken line (62) to start the reverse rotation of the switching motor 101. Next, the process proceeds to ST33.

  As described above, since the forward / reverse switching lever is always in the neutral mode when the ignition key switch is turned on, it is possible to provide a snowplow that can smoothly switch to the mode selected by the driver.

The power source according to the present invention has been described using an engine in the embodiment, but may be an electric motor, for example.
Moreover, although the traveling part which concerns on this invention demonstrated by the crawler type in embodiment, a wheel type may be sufficient, for example.

  The snowplow of the present invention is suitable for a walking type snowplow operated by a driver while walking behind the fuselage.

1 is a side view of a snowplow according to the present invention. FIG. 2 is a view taken along line 2-2 in FIG. 1. 1 is a drive system diagram of a snowplow according to the present invention. It is an operation | movement flowchart of the snow remover which concerns on this invention. FIG. 3 is a modified embodiment diagram of FIG. 2. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is an effect | action figure of the lever drive mechanism which concerns on this invention. It is a disassembled perspective view of the 1st connection mechanism which concerns on this invention. It is a perspective view of the lever drive mechanism and 1st connection mechanism which concern on this invention. It is an effect | action figure of the lever drive mechanism and 1st connection mechanism until it switches from forward mode to neutral mode. It is an action figure of a lever drive mechanism and the 1st connecting mechanism until it changes from reverse mode to neutral mode. It is an operation | movement flowchart of the snow remover provided with the lever drive mechanism and the 1st connection mechanism. It is a driving | operation preparation flowchart of the snow remover provided with the lever drive mechanism and the 1st connection mechanism.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Snow blower, 11 ... Airframe, 13 ... Traveling part, 14 ... Engine (power source), 21 ... Auger, 22 ... Blower, 23 ... Shooter, 27 ... Driver, 31 ... Object detection member, 34 ... Traveling clutch, DESCRIPTION OF SYMBOLS 40, 40B ... Hydraulic transmission, 41 ... Switching operation part, 42, 101 ... Switching motor, 44, 106 ... Drive gear, 45, 112 ... Driven gear, 47 ... Link, 48, 90 ... Shifting change lever, 49 ... Pin, 51 ... Rod, 52 ... Input shaft, 53 ... Output shaft, 60, 170 ... Control unit, 75, 173 ... Rotary displacement sensor, 76 ... Object detection switch, 91 ... Front end (other end), 92 ... Rear end (One end), 93 ... rear end (other end), 100 ... lever drive mechanism, 102 ... transmission part, 104 ... first shaft, 105 ... second connecting part, 108 ... intermediate gear, 109 ... arm, 111 ... fastening part 113: friction plate, DESCRIPTION OF SYMBOLS 30 ... 1st connection mechanism, 134, 141 ... Connection member, 139 ... Tip (one end), 142 ... Support member, 143 ... Lever, 145 ... Rod, 151 ... Case, 160 ... Forward / reverse switching lever, 171 ... Ignition key switch (Power switch), 172... Second axis.

Claims (1)

Rotate the snow removal part with a power source mounted on the fuselage, rotate the input shaft of the hydraulic transmission, and prepare for the fuselage at the output shaft of the hydraulic transmission by the operation of the driver walking with the fuselage behind the fuselage In a snowplow of the type that moves the traveling part forward, stops, and reverses,
The snowplow includes a traveling clutch that connects and disconnects a driving force between the power source and the hydraulic transmission, and includes an object detection member that detects an object in contact with an object at a rear portion of the body.
When the object detection member detects an object, it generates a command to disconnect the traveling clutch, generates a command to switch the hydraulic transmission mode to forward, and then generates a command to connect the traveling clutch. A snow remover comprising a control unit that performs a series of controls for generating a command to disengage the traveling clutch when the traveling clutch has been connected for a predetermined time.

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