JP5626985B2 - Tractor work machine - Google Patents

Description

  The present invention relates to a tractor work machine that includes a vehicle body portion that travels with an engine mounted thereon, and a work portion that has a part that operates by receiving electric power generated by the vehicle body portion, and that can be attached to and detached from the vehicle body portion. .

  Conventionally, an invention of a tractor working machine that includes a vehicle body portion that travels with an engine mounted thereon and a work portion that has a part that operates by receiving electric power generated in the vehicle body portion, and that can be attached to and detached from the vehicle body portion. Is disclosed (for example, Patent Document 1).

  The tractor working machine described in Patent Document 1 includes a vehicle body 6 (vehicle body part) and a work machine 15 (working part). In this tractor working machine, a coupler is used at the connecting portion of the control wiring between the vehicle body 6 and the working machine 15. More specifically, the working machine 15 includes an electric motor 38 for moving the tilling cover 37, a tilling depth sensor 41 for detecting the vertical rotation angle of the rear cover 40, a rolling sensor for detecting the left-right inclination of the working machine 15, and the like. Various parts that operate upon receiving power are provided. Various components such as the rolling sensor, the electric motor 38 and the tilling depth sensor 41 are electrically connected to the harness terminal 1 in the swing coupler 3 provided in the work machine 15 via the harness 42. The swing coupler 3 is attached to the work machine body 17 of the work machine 15 via a spring 46 and a bracket 32, and can move back and forth and swing up and down and right and left. On the other hand, the coupler 2 is fixed to the vehicle body 6. A harness terminal 30 is provided in the coupler 2.

  When the work implement 15 is attached to and detached from the vehicle body 6, the coupler 2 and the swing coupler 3 are fitted and detached, and when fitted, the harness terminal 30 in the coupler 2 and the harness terminal 1 in the swing coupler 3 Is energized.

Japanese Patent Laid-Open No. 08-116714

  As described in Patent Document 1, when a coupler is used for energization between the vehicle body portion and the working portion, a problem peculiar to the tractor working machine occurs. That is, the tractor work machine is designed on the assumption that the tractor work machine runs on the field or performs work on the field, and is required to have vibration resistance and tolerate a certain amount of rattling. For this reason, in the tractor working machine, it is possible to easily attach and detach the vehicle body portion and the working portion without accurately positioning the vehicle body portion with respect to the working portion. Moreover, in a tractor working machine, it is generally performed that the operator moves the three-point link mechanism while sitting in the cockpit of the vehicle body unit to attach and detach the vehicle body unit and the work unit.

  However, the coupling of the coupler requires a positional accuracy higher than that required for a tractor working machine manufactured with such a design concept. For this reason, in order to connect the coupler while sitting in the cockpit, the operator of the tractor work machine must operate the tractor work machine with much higher accuracy than the operation performed on a daily basis. If such a high-precision operation cannot be performed, the driver must get out of the cockpit in order to manually connect the coupler.

  The present invention has been made in view of the above points, and it is an object of the present invention to enable energization between the vehicle body portion and the working portion in the tractor working machine and the interruption thereof with an easy operation.

The tractor work machine of the present invention includes (a) a vehicle body portion and a work portion, and (b) the vehicle body portion includes a three-point link mechanism including a top link and a pair of lower links, and in the vicinity of the top link. A top hook provided, a pair of lower hooks provided in the vicinity of each of the pair of lower links, a power supply unit for supplying power, and a pair of vehicle bodies provided on each of the pair of lower hooks and connected to the power supply unit (C) the working unit is supplied with power by a top engaging part that engages with the top hook, a pair of lower engaging parts that engage with each of the pair of lower hooks, and Provided in the vicinity of each of the electric operating portion to be driven and the pair of lower engaging portions, connected to the electric operating portion, and contacts the vehicle body portion electrode when the lower engaging portion engages with the lower hook. Look including a, and a working unit electrode of the pair,
One of the body part electrode and the working part electrode has a plate shape,
The other of the body part electrode and the working part electrode has a convex shape that abuts against one of them,
Each of the vehicle body electrode and the working electrode can be rotated around a predetermined point.
Are in contact with each other and energized,
At least one of the vehicle body part electrode and the working part electrode is biased toward the other.

  According to the present invention, the top engagement portion engages with the top hook and the lower engagement portion engages with each of the pair of lower hooks, and the vehicle body portion and the working portion are coupled to each other. A current circuit is formed in contact with the vehicle body electrode and circulating between the power supply unit and the electric actuator. Therefore, the energization between the vehicle body part and the working part in the tractor working machine and the interruption thereof can be performed with an easy operation.

It is a side view of a tractor working machine. It is a side view of the rear part of a vehicle body part, and a working part. It is a rear view of a vehicle body part. FIG. 6 is a side view of a part of the rear part of the vehicle body part and a part of the front part of the working part in a state where the lower pin is fitted in the U-shaped hole of the lower hook base part and locked by the lower hook claw part. FIG. 5 is a view taken in the direction of an arrow X in FIG. It is a side view of the vehicle body part and a working part in the state which is not mutually connected. FIG. 7 is a side view of the vehicle body portion and the working portion in a state where the top pin is engaged with the top hook, following FIG. 6. FIG. 8 is a side view of the vehicle body part and the working part in a state where the lower pin pushes up the lower hook claw part, following FIG. 7. FIG. 9 is a side view of the vehicle body portion and the working portion in a state where the lower pin enters the U-shaped hole, following FIG. 8. FIG. 10 is a side view of the vehicle body portion and the working portion in a state where the lower hook claw portion locks the lower pin and the U-shaped pin sandwiches the lever portion, following FIG. 9. It is a side view of a lower hook in the state where a lever part was moved greatly.

  One embodiment will be described with reference to FIGS. FIG. 1 is a side view of the tractor work machine 101. The right side of FIG. 1 is the front side of the tractor work machine 101. The tractor work machine 101 includes a vehicle body part 201 and a work part 301. The working unit 301 is positioned on the rear side of the vehicle body unit 201. A top hook 202 and a lower hook 203 are provided on the rear side of the vehicle body portion 201. In addition, a front pin 302 as a top engaging portion and a lower pin 303 as a lower engaging portion are provided on the front side of the working portion 301. When the top pin 302 engages with the top hook 202 and the lower pin 303 engages with the lower hook 203, the working unit 301 is attached to the vehicle body unit 201.

  An engine (not shown) is mounted on the vehicle body portion 201 and can travel by the operation of the operator. A battery 204 as a power supply unit is also mounted on the vehicle body unit 201. In addition, the working unit 301 is provided with an electric operating unit 304. The electric actuator 304 operates by receiving power supply from the battery 204. In the present embodiment, the working unit 301 is divided into three in the left-right direction, and the left and right outer portions have a structure that can be folded to the center side. The folding rotation is performed by an electric cylinder (not shown) included in the electric actuator 304.

  The vehicle body unit 201 is equipped with a signal transmission unit 205 that operates by receiving power supplied from the battery 204 and generates a radio signal. The electric operating unit 304 of the working unit 301 is equipped with a signal receiving unit 307 that receives a radio signal from the signal transmission unit 205 and controls the driving of the electric operating unit 304.

  FIG. 2 is a side view of the rear part of the vehicle body part 201 and the working part 301. FIG. 3 is a rear view of the vehicle body portion 201. In FIG. 3, the torsion spring 403 is omitted for explanation. A three-point link mechanism 206 is provided on the rear side of the vehicle body portion 201. The three-point link mechanism 206 includes a top link 207, a pair of left and right lower links 208, a lift arm 209 (see FIG. 1), and a hitch 210. The top link 207 is located on the rear side of the vehicle body 201 and is swingable. Each of the pair of left and right lower links 208 is located on the rear side of the vehicle body portion 201 and is rotatable up and down. The lift arm 209 is rotated up and down by an operation performed by the operator performed in the vehicle body unit 201 to rotate the lower link 208 up and down. The hitch 210 has an inverted U-shape, and connects the rear end portions of the left and right lower links 208 and the rear end portions of the top links 207.

  The above-described top hook 202 is provided in the vicinity of the rear end portion of the top link 207, and protrudes rearward from the central upper portion of the hitch 210. The lower hook 203 is provided in the vicinity of the rear end of each of the pair of lower links 208 and protrudes rearward from each of the left and right lower ends of the hitch 210. The lower hook 203 is connected by a bar 211 extending in the left-right direction (the width direction of the vehicle body portion 201).

  Details of the lower hook 203 will be described. The lower hook 203 includes a lower hook base portion 251, a lower hook claw portion 252, and a claw operation portion 253. The lower hook base 251 forms a U-shaped hole 254. The lower pin 303 enters the U-shaped hole 254. Further, a claw rotation shaft 255 projects outward from the lower hook base 251 in the left-right direction. The lower hook claw portion 252 is rotatably attached to the claw rotation shaft 255 and is prevented from being detached by the E ring 256. The lower hook claw portion 252 forms an inclined side portion 252a that is directed downward and inclined upward toward the rear, and a receiving groove portion 252d that is caught on the outer peripheral surface of the lower pin 303. The lower hook claw portion 252 is moved by the lower pin 303 and the claw operation portion 253 to open and close the U-shaped hole 254, and the lower pin 303 that has entered the U-shaped hole 254 is sandwiched by the receiving groove portion 252d. Prevent falling off.

  The claw operation part 253 moves the lower hook claw part 252 and includes a frame part 257, a fulcrum part 258, and a lever part 259. The frame portion 257 is formed by bending a metal pipe into a gate shape. Both end portions of the frame portion 257 extend in the vertical direction and are rotatably attached to the lower hook claw portion 252. The fulcrum part 258 is provided in the upper part of the hitch 210 and receives the middle part of the frame part 257 which is pulled by a torsion spring 403 (described later) to move downward. The lever portion 259 extends upward from the fulcrum portion 258. At the upper end of the lever portion 259, a grip portion 260 for the operator to grip is formed. When the grip portion 260 is gripped and the lever portion 259 is moved, the fulcrum portion 258 moves, the frame portion 257 is displaced up and down, and the lower hook claw portion 252 opens and closes the U-shaped hole 254. Further, the lever portion 259 is stuck between the U-shaped pins 210c and cannot move. The U-shaped pin 210c is inserted into and removed from the hole 210b of the retaining plate 210a fixedly attached to the hitch 210. When the U-shaped pin 210c is positioned at a position indicated by a solid line in FIG. 2, the lever portion 259 can move without being pinched by the U-shaped pin 210c. On the other hand, when the U-shaped pin 210c is positioned at a position indicated by a one-dot chain line in FIG. 2, the lever portion 259 is sandwiched by the U-shaped pin 210c and does not move. The operator can fix or move the lever portion 259 by changing the way of inserting the U-shaped pin 210c into the retaining plate 210a.

  FIG. 4 shows a part of the rear part of the vehicle body part 201 and a part of the front part of the working part 301 in a state where the lower pin 303 is fitted in the U-shaped hole 254 of the lower hook base part 251 and locked by the lower hook claw part 252. FIG. FIG. 5 is a view taken along the arrow X in FIG. 4 showing a part of the front portion of the working unit 301. For the sake of explanation, the input shaft cover 355 is omitted in FIGS. 4 and 5. Please refer to FIG. The working unit 301 includes an upper frame body 351 and a lower frame body 352 as part of the members constituting the framework.

  The upper frame body 351 has a plate shape and tapers forward in a side view. The above-described top pin 302 is provided at the front end portion of the upper frame body 351. The top pin 302 extends in the left-right direction (the width direction of the working unit 301) and is disposed at a position facing the top hook 202 of the vehicle body unit 201. The top pin 302 engages with the top hook 202 by being scooped up by the top hook 202.

  The lower frame body 352 includes two frame plates 352a. The two frame plates 352a are arranged in the left-right direction and protrude forward in a side view. The aforementioned lower pin 303 is provided at the front end portion of each frame plate 352a. A pair of lower pins 303 are provided below the top pins 302 and are spaced apart in the left-right direction of the working unit 301. The pair of lower pins 303 are disposed at positions facing the pair of lower hooks 203 of the vehicle body portion 201, respectively, and both protrude outward in the left-right direction of the working portion 301 and extend in the left-right direction. The pair of lower pins 303 engages with each of the pair of lower hooks 203 that are separated from each other in the left-right direction of the vehicle body portion 201 and are locked by the lower hook claw portions 252.

  A gear case 353 is disposed between the upper frame body 351 and the lower frame body 352. A pipe-shaped pipe frame 353a extends from the gear case 353 in the left-right direction. A plate-like relay frame 353c is provided on the outer periphery of the pipe frame 353a. The upper frame body 351, the lower frame body 352, and the relay frame 353c are fixed by bolts and nuts or the like so that their relative positions do not change (see also FIGS. 6 to 10).

  An input shaft 354 protrudes forward from the gear case 353. The input shaft 354 protrudes forward from a substantially center in the left-right direction of the working unit 301 and is covered with the input shaft cover 355. The input shaft 354 is connected to a power take-off shaft (not shown) provided on the rear side of the vehicle body 201 by a universal joint. The power input from the power take-out shaft to the input shaft 354 rotates the excavating blade 305 via a power transmission mechanism 353d that is disposed in the gear case 353 and the pipe frame 353a and is configured with a gear or the like.

  Please refer to FIG. The vehicle body portion 201 includes a pair of vehicle body portion electrodes 401, wirings 402, and a torsion spring 403 as a claw spring.

  The pair of vehicle body part electrodes 401 is provided on each of the lower hook claw parts 252 of the pair of lower hooks 203. Hereinafter, description will be made focusing on one vehicle body electrode 401 and the torsion spring 403 located on the right side of the working unit 301. The other body part electrode 401 and the torsion spring 403 located on the left side of the working part 301 are bilaterally symmetrical with the one body part electrode 401 and the torsion spring 403 located on the right side, and the description thereof is omitted.

  The vehicle body electrode 401 includes a metal plate 401a. The metal plate 401a extends in parallel with the inclined side portion 252a of the lower hook claw portion 252 and is fixed to the mounting projection 252b extending outward from the lower hook claw portion 252 using a bolt nut 252c.

  The wiring 402 extends from the front surface of the metal plate 401a of the left and right vehicle body electrode 401. These wirings 402 are all connected to the battery 204. A relay box and a contact switch (both not shown) are provided in the middle of the wiring 402 so that power is supplied to the signal transmission unit 205 (see FIG. 1).

  The torsion spring 403 is disposed between the lower hook base 251 and the lower hook claw 252. One end (first end 403 a) of the torsion spring 403 is restrained by the lower hook base 251. The other end (second end 403 b) of the torsion spring 403 is restrained by the lower hook claw 252. The winding portion 403 c of the torsion spring 403 is not restrained by either the lower hook base portion 251 or the lower hook claw portion 252. For this reason, when the lower hook claw portion 252 rotates with respect to the lower hook base portion 251, the winding portion 403 c of the torsion spring 403 rotates with the movement of the lower hook claw portion 252.

  Please refer to FIG. 2, FIG. 4 and FIG. The working unit 301 includes a pair of working unit electrodes 501, wirings 502, coil springs 503, and arms 504. The pair of working unit electrodes 501 is provided on each of the pair of frame plates 352a. Hereinafter, description will be made focusing on one working unit electrode 501, coil spring 503, and arm 504 located on the right side of the working unit 301. The other working part electrode 501, coil spring 503, and arm 504 located on the left side of the working part 301 are bilaterally symmetric with those located on the right side, and a description thereof is omitted.

  A rotation shaft 504a, a mounting shaft 352b, and a stopper shaft 352c protrude outward from the frame plate 352a in the left-right direction. In FIG. 5, the stopper shaft 352c is hidden behind the rotation shaft 504a and cannot be seen. The arm 504 is rotatably attached to the rotation shaft 504a and extends in the front-rear direction from the rotation shaft 504a. The coil spring 503 connects the mounting shaft 352b and the rear end of the arm 504, and pulls the rear end of the arm 504 downward. The rotation of the rear side portion of the arm 504 pulled downward is prevented by the stopper shaft 352c.

  The working portion electrode 501 is provided on the front side of the arm 504 and is positioned in the vicinity of the lower pin 303 and in contact with the vehicle body portion electrode 401 when the lower pin 303 engages with the lower hook claw portion 252. The working part electrode 501 includes a convex part 501a. The convex portion 501 a protrudes upward and abuts against the lower surface portion of the metal plate 401 a of the vehicle body electrode 401.

  As shown in FIG. 5, in the working unit 301, two sets of working unit electrodes 501, coil springs 503, and arms 504 are provided for each frame plate 352a. For this reason, even if one working part electrode 501, coil spring 503, or arm 504 is damaged on one frame plate 352 a, or if one side of the working part electrode 501 is poorly insulated, the tractor work machine 101. There will be no problems with the use of.

  The wiring 502 extends from the convex part 501a of the left and right working part electrodes 501. These wirings 502 are all connected to the electric actuator 304. In the middle of the wiring 502, a relay box 304a, a signal receiving unit 307, and a contact switch (not shown) are provided so that the electric actuator 304 and the signal receiving unit 307 are also supplied with power.

  FIG. 6 is a side view of the vehicle body portion 201 and the working portion 301 in a state where they are not connected to each other. For the sake of explanation, the wirings 402 and 502 are omitted in FIG. Note that the wirings 402 and 502 are also omitted in FIGS. A procedure for connecting the working unit 301 to the vehicle body unit 201 in the tractor working machine 101 configured as described above will be described below.

  First, the U-shaped pin 210c is attached to the retaining plate 210a so as not to sandwich the lever portion 259. In this state, the operator of the vehicle body unit 201 operates the vehicle body unit 201 to move the three-point link mechanism 206 upward (in the direction of the arrow R1 in FIG. 6) and scoops the top pin 302 with the top hook 202.

  FIG. 7 is a side view of the vehicle body portion 201 and the working portion 301 in a state where the top pin 302 is engaged with the top hook 202, following FIG. When the top hook 202 scoops up the top pin 302, the working unit 301 rotates downward (in the direction of arrow R2 in FIG. 7) about the top pin 302 by its own weight. As a result, the lower pin 303 pushes the inclined side portion 252a of the lower hook claw portion 252 forward, and pushes the lower hook claw portion 252 upward (in the direction of arrow R3 in FIG. 7).

  FIG. 8 is a side view of the vehicle body portion 201 and the working portion 301 in a state where the lower pin 303 pushes up the lower hook claw portion 252 following FIG. 7. When the lower hook claw portion 252 is pushed up, the lower pin 303 further moves forward (in the direction of arrow R4 in FIG. 8) and enters the U-shaped hole 254 of the lower hook base portion 251.

  FIG. 9 is a side view of the vehicle body portion 201 and the working portion 301 in a state where the lower pin 303 has entered the U-shaped hole 254 following FIG. 8. When the lower pin 303 enters the U-shaped hole 254, the lower hook claw portion 252 is pushed by the torsion spring 403 and moves downward (in the direction of arrow R5 in FIG. 9). As a result, the lower pin 303 is sandwiched between the U-shaped hole 254 of the lower hook base 251 and the receiving groove 252 d of the lower hook claw 252 and is locked to the lower hook 203. As a result, the vehicle body unit 201 and the working unit 301 are connected.

  Here, when the lower hook claw portion 252 moves in the direction of the arrow R5 in FIG. 9, the convex portion 501a of the working portion electrode 501 comes into contact with and contacts the metal plate 401a of the vehicle body portion electrode 401. Thereby, from the battery 204 (see FIG. 2 and the like), one (for example, the right side of the working unit 301), the vehicle body part electrode 401 and the working unit electrode 501, the electric actuator 304 (see FIG. A current circuit that returns to the battery 204 again through the vehicle body electrode 401 and the work unit electrode 501 is configured, and power is supplied to the electric actuator 304 and the signal receiver 307 (see FIG. 2 and the like). In this state, when the operator of the vehicle body unit 201 operates the signal transmission unit 205 to generate a radio signal from the signal transmission unit 205, the electric operation unit 304 is remotely controlled, and the electric operation unit 304 operates.

  Further, the convex portion 501a is pushed upward (in the direction of arrow R6 in FIG. 9) by the coil spring 503. That is, the torsion spring 403 and the coil spring 503 press the vehicle body part electrode 401 and the working part electrode 501 together. Here, the torsion spring 403 and the coil spring 503 serve as the urging portion P.

  FIG. 10 is a side view of the vehicle body portion 201 and the working portion 301 in a state where the lower hook claw portion 252 locks the lower pin 303 and the U-shaped pin 210c sandwiches the lever portion 259, following FIG. After the lower pin 303 is locked to the lower hook 203, the U-shaped pin 210c is attached to the retaining plate 210a so as to sandwich the lever portion 259. As a result, the lower hook claw portion 252 does not move with respect to the lower hook base portion 251, and the connection between the vehicle body portion 201 and the working portion 301 is not released.

  When removing the working unit 301 from the vehicle body unit 201, the working unit 301 is raised by the three-point link mechanism 206, the U-shaped pin 210c is detached from the retaining plate 210a, and the lever unit 259 can be moved. By gripping, the lever portion 259 is moved forward (in the direction of arrow R7 in FIG. 10). Thereby, the frame portion 257 is lifted by the fulcrum portion 258, the lower hook claw portion 252 moves upward (in the direction of arrow R8 in FIG. 10), and the U-shaped hole 254 of the lower hook base portion 251 is opened. Further, the vehicle body electrode 401 is separated from the working electrode 501. As a result, the current circuit is interrupted, and power supply to the electric actuator 304 and the signal receiver 307 is stopped. When the working unit 301 is lowered in this state, the lower pin 303 moves backward from the lower hook base 251 and the top pin 302 is removed from the top hook 202. The removal is performed in a state where a stand (not shown) with caster wheels is attached to the working unit 301 side so that the vehicle body unit 201 can move.

  As described above, in the tractor working machine 101 according to the present embodiment, when the top pin 302 is engaged with the top hook 202 and the lower pin 303 is engaged with each of the pair of lower hook bases 251, The electrode 501 is connected. At this time, the working unit electrode 501 and the vehicle body unit electrode 401 are in contact with each other, and a current circuit that circulates between the battery 204 mounted on the vehicle body unit 201 and the electric operating unit 304 mounted on the working unit 301 is configured. That is, energization between the vehicle body electrode 401 and the work part electrode 501 and the interruption thereof in the tractor work machine 101 are performed by an easy operation.

  In the present embodiment, the urging portion P (torsion spring 403, coil spring 503) presses the vehicle body portion electrode 401 and the working portion electrode 501 together. For this reason, even if the tractor work machine 101 vibrates in the middle of traveling on the field farm GL or performing work on the field farm GL, the vehicle body electrode 401 and the work section electrode 501 are not separated, and the current circuit is intended. Never shut off.

  In the present embodiment, the vehicle body electrode 401 includes a metal plate 401a, and the working unit electrode 501 includes a convex portion 501a that abuts against the metal plate 401a. Further, these electrodes (vehicle body electrode 401, work unit electrode 501) are rotated and contacted with each other as one center, and scrape dirt and the like that are rubbed against each other when abutting. For this reason, even if soil adheres to the vehicle body electrode 401 or the work portion electrode 501 during traveling in the field field GL or during work on the field field GL, the convex portion 501a scrapes off the soil attached to the metal plate 401a. The energization between the part electrode 401 and the working part electrode 501 becomes good.

  FIG. 11 is a side view of the lower hook 203 in a state in which the lever portion 259 is largely moved. For the sake of explanation, the frame portion 257 and the wiring 402 are omitted in FIG. Further, in the present embodiment, the second end 403b of the torsion spring 403 is attached to the lower hook claw 252 so as to straddle the virtual line Y shown in FIG. 11 when the lower hook claw 252 rotates. . This imaginary line Y passes through the claw rotation shaft 255 (the rotation center of the lower hook claw portion 252) and the first end 403a. Therefore, when the lever portion 259 is moved and the second end portion 403b of the torsion spring 403 is positioned on the front side of the imaginary line Y, the torsion spring 403 moves the second end portion 403b forward and downward (arrow in FIG. 11). R9) and further rotate the lower hook claw 252 in the direction of arrow R8 in FIG. That is, when the operator moves the lever portion 259 to some extent, even if the operator accidentally releases his hand from the grip portion 260, the lower hook claw portion 252 does not return downward, and the vehicle body portion electrode 401 and the working portion electrode 501 (see FIG. 10 etc.) will not accidentally come into contact. Further, when the working part 301 is removed from the vehicle body part 201, the lower hook claw part 252 can be maintained in the raised state.

  In the present embodiment, the vehicle body electrode 401 is provided on the lower hook claw 252. However, as another embodiment, the vehicle body electrode 401 may be provided on the lower hook base 251.

  In the present embodiment, the vehicle body electrode 401 has a plate shape and the working portion electrode 501 has a pin shape. However, as another embodiment, the vehicle body portion electrode 401 has a pin shape and the working portion electrode 501. May be plate-shaped.

DESCRIPTION OF SYMBOLS 101 Tractor working machine 201 Car body part 202 Top hook 204 Battery (electric power supply part)
206 Three-point link mechanism 207 Top link 208 Lower link 251 Lower hook base 252 Lower hook claw 253 Claw operating part 254 U-shaped hole 255 Claw rotation shaft (rotation center of lower hook claw)
301 Working part 302 Top pin (top engaging part)
303 Lower pin (lower engagement part)
304 Electric Actuator 401 Car Body Electrode 401a Metal Plate 403 Torsion Spring (Claw Spring, Energizing Part)
403a First end portion 403b Second end portion 501 Working portion electrode 501a Convex portion 503 Coil spring (biasing portion)
P Energizing part Y Virtual line

Claims (2)

It has a body part and a working part,
The vehicle body is
A three-point link mechanism including a top link and a pair of lower links;
A top hook provided in the vicinity of the top link;
A pair of lower hooks provided in the vicinity of each of the pair of lower links;
A power supply unit for supplying power;
A pair of vehicle body electrodes provided on each of the pair of lower hooks and connected to the power supply unit;
Including
The working unit is
A top engaging portion that engages with the top hook;
A pair of lower engaging portions that engage with each of the pair of lower hooks;
An electric actuator that receives power to drive, and
A pair of working part electrodes provided in the vicinity of each of the pair of lower engaging parts, connected to the electric operating part, and in contact with the vehicle body part electrode when the lower engaging part engages with the lower hook; only including,
One of the body part electrode and the working part electrode has a plate shape,
The other of the body part electrode and the working part electrode has a convex shape that abuts against one of them,
Each of the vehicle body electrode and the working electrode can be rotated around a predetermined point.
Are in contact with each other and energized,
A tractor working machine in which at least one of the body part electrode and the working part electrode is biased toward the other. The lower hook is
A lower hook base part that forms a U-shaped hole into which the lower engaging part enters;
In front of the lower engaging portion that is pivotally attached to the lower hook base and enters the U-shaped hole.
A lower hook claw to prevent the U-hole from falling off;
A claw operating part for moving the lower hook claw part;
Including
The vehicle body electrode is provided on the lower hook claw portion,
The tractor working machine according to claim 1.

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