JPH0563208U - Tractor hitch - Google Patents

Abstract

(57) [Abstract] [Purpose] In the automatic hit of the tractor, the socket inserted in the electric cord that connects the detector or motor mounted on the work machine to the battery or control device of this machine is not damaged when the work machine is attached or detached. The purpose is to do so. [Structure] Tractor An electric cord working machine in which a hitch frame is attached to a rear portion of the main body via a link, a working machine having an electric device is detachably connected to the hitch frame, and the electric device is connected to the main machine. An interrupting socket is provided near the attaching / detaching part, one of the sockets is attached to the top mast, and the other is pivotally supported on the hitch frame so as to rotate back and forth with a lateral support shaft and at the time of removing the working machine. A tractor hitch configured to rotate forward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 Tractor A tractor hitch that is detachably connected to a rear part of the machine via a hitch frame with a working machine having electric equipment.

[0002]

[Prior Art]

 Conventionally, a hitch frame is attached to the rear part of the tractor main body via a link, and a working machine having an electric device is connected to the hitch frame so that the work device can be automatically attached and detached. It has already been known that the electric cord is connected to a power source of the machine by means of the above, and an interrupting socket is provided in the vicinity of the work machine attaching / detaching portion of the electric cord.

[0003]

[Problems to be solved by the device]

 When the work implement is attached to or detached from the hitch frame, it is usually troublesome because the driver or another worker intermittently operates the socket, and forgetting to remove the socket and removing the work implement. There was a break in the electric cord. Also, when the work machine is attached to or detached from the hitch frame, the lower part of the working machine rotates in the front-rear direction around the upper connecting pin engaged with the upper hook, so the socket was mounted on the working machine and the hitch frame. Only then will the joint become uncertain or damaged.

[0004]

[Means for Solving the Problems]

 According to the present invention, a tractor is equipped with a hitch frame at the rear of the machine via a link, a working machine having an electric device is detachably connected to the hitch frame, and an electric cord for connecting the electric device to the machine is provided. An interrupting socket is provided near the work machine attachment / detachment part, one of the sockets is attached to the front part of the work machine, the other is attached to the hitch frame, and at least one socket is rotated forward and backward by a lateral support shaft. The above-mentioned problems have been solved by rotatably supporting and at least one of both sockets is detachably rotated with respect to the other when the work machine is removed.

[0005]

[Action]

 When installing the implement, hook the top hook on the top of the hitch frame to the upper connecting pin above the front of the implement and raise the hitch frame in this state to rotate the implement forward around the upper connecting pin. The lower connecting pin fits into the lower hook and is locked. In the process, the socket mounted on the hitch frame is superposed and connected to the socket fixed on the top mast while rotating around the lateral support shaft. When removing the work implement, raise the work implement together with the hitch frame and lower the work implement with the lower hook unlocked. And rotate backwards so that the lower connecting pin comes out from the lower hook of the hitch frame. At this time, one socket pivotally supported by a lateral support shaft is retracted and pivoted about the support shaft with respect to the other socket, and is removed. That is, the working machine rotates back and forth with respect to the hitch frame about the upper connecting pin in the horizontal direction, and one of the sockets also retracts and rotates about the horizontal support shaft, so that the socket can be securely and You can make intermittent breaks without damage.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Lower links 2 are axially supported by lower link pins provided on the lower left and right of the rear part of a mission case 1 of an agricultural tractor, and the lower link 2 is provided on the upper left and right of the rear part of the mission case 1. It is connected to the lower link 2 by a pin at the tip of a lift rod 4 which is rotatably supported downward at the tip of a lift arm 3 provided. A top link support 5 that opens rearward is attached to the center of the rear surface of the transmission case 1, and a front portion of the top link 6 is rotatably mounted in a hole at the tip of the top link support 5. The rear end of the link 2 is connected to a hitch frame 7, and a rotary type tiller 9 as a working machine is detachably connected to the hitch frame 7. On the other hand, a PTO shaft projects in the lower center of the rear part of the mission case 1, and the yoke joint 8 transmits power to the cultivating shaft via the gear case 11 and the chain case 10 of the cultivating device 9.

At the rear part of the hitch frame 7, a top mast 12 formed by joining two L-shaped plates in a side view is erected, and the arm of the lower tiller 9 is mounted via the left and right mast stays 13. While supporting, it also forms a fulcrum for the rear electric cylinder 16 and the tail wheel adjustment handle outer cylinder.

On the upper surface of the rotary cover 14 supported by the gear case 11 and the chain case 10, a rotating rail 15 having an arcuate shape in a laterally symmetrical side view is arranged, and the rotating rail 15 is fitted to a guide roller. It is possible to move back and forth along the rotary cover 14 by being guided, and a horizontal frame 17a pivotally attached to the upper end of the rear cover 17 is fixed to the rear end of the rotary frame 14 and the horizontal frame 17a is fixed. A pin is rotatably connected to the lower end of the electric cylinder 16. A bracket 18 which is erected on the left side of the upper surface of the rear cover 17 is connected to a link 23 via a rod 19, a link 20 and a wire 21, and the link 23 is an input shaft fixed to the front surface of the gear case 11. The right side surface of the cover 22 is pivotally supported by a pin 22a.

A roller that pivotally attaches the intermediate portion of the link arm 26 to the lower portion of the bracket 25 fixed to the right side surface of the transmission bracket 7 a at the center of the hitch frame 7 by a pin, and rotates the tip end of the link arm 26. 27 is attached, the other end is connected to the rear end of the inner of the wire 28 connected to the tilling depth detection sensor 29 mounted on the left side surface of the front mission case, and the roller 27 is connected to the upper part by the return spring 24. The upper front surface of the link 23, which is urged to move forward, is brought into contact with the upper side of the mounting plate 25a provided on the bracket 25. Is supported by being screwed so that it can be moved forward and backward, and the lower end serves as a stopper that receives the upper surface of the front part of the link arm 26. At that time, the wire 28 is used for detecting the working depth. The outer arm is adjusted so that the link arm 26 can be received by the stopper while the sensor arm 38 of the sensor 29 is pulled most forward by the spring 39. This adjustment was performed before mounting the tiller 9, and this was used as the detection starting end point of the cultivation depth detecting sensor 29. Further, the length of the wire 21 is adjusted by the nut of the outer stopper so that the link 23 comes into contact with the roller 27 of the link arm 26 in the starting end value posture with the turning rail at the foremost position.

Further, the wire 28 is taken out from the hitch frame 7 obliquely upward in a substantially vertical direction, passes over the center line of the machine body, passes over the top link 6, and is attached to the left side surface of the mission case 1 of the front tractor machine. It is connected substantially horizontally to the provided cultivation depth detecting sensor 29.

The turning rail 15 moves back and forth in an arc shape along the upper surface of the rotary cover 14 as described above. The amount of movement of the turning rail 15 is from a bracket provided on the left side of the rear end of the turning rail 15 to a link. It is transmitted via a rod 30 to the upper part of a link arm 31 whose lower part is pivotally supported by a bracket 22b on the left side of the input shaft cover 22 fixed to the front part of the gear case 11.

On the left side surface of the transmission bracket 7a at the center of the hitch frame 7, there is a middle portion of the driven side link arm 33 that is urged by the return spring 24 so that the upper portion moves rearward. The roller 34 pivotally supported and axially supported on the upper end of the link arm 33 is pressed against the front surface of the link arm 31, and the outer end of the wire 35 whose inner end is connected to the lower end of the link arm 33 has a transmission bracket. A bracket 32a which is integral with 7a is screwed to an upper end bent portion of a mounting plate 32 which is erected so as to be able to move forward and backward, and a lower end of the mounting plate 32 serves as a stopper portion.

The state where the link arm 33 is in contact with the stopper portion at the lower end of the mounting plate 32 is used as the detection starting end point of the rotation detection sensor 36 mounted on the other side of the mission case 1. Similar to the link arm 26 of FIG. 2, the link arm 31 is rotated before the mounting of the tiller 9, and the link arm 31 rotates the rotating rail 15 to the rearmost side by the electric cylinder 16 with the tiller 9 being connected to the hitch frame 7. The length of the link rod 30 is adjusted so that the rear cover 17 comes into contact with the roller 34 of the link arm 33 when the rear cover 17 is in the lowest position and in the shallowest tillage depth.

The wire 35 is taken out from the hitch frame 7 obliquely upward in a substantially vertical manner, and in symmetry with the plowing depth control wire 28, it passes over the center line of the machine body and passes over the top link 6 to move forward. The tractor is connected substantially horizontally to a rotation detection sensor 36 provided on the right side surface of the mission case 1 of the main body.

As shown in FIG. 7, the front ends of the wires 28 and 35 taken out from the hitch frame 7 are connected substantially horizontally to the sensor arm 38 of the plowing depth detecting sensor 29 and the rotation detecting sensor 36, and the plowing depth detecting sensor 29 and the rotation detection sensor 36 are attached to brackets 37 of the same size which are symmetrically provided on the left and right side surfaces of the transmission case 1 of the tractor main body, and the rotation angle (operating angle) of both sensor arms 38, 38. In (), the detection values are the same for both, and when the detection start point position is at the angle shown in the figure, a dead zone is provided between the stopper 39a and the stopper 39a. Further, handling is further improved by clearly indicating the starting point position by a mark or a lamp at a position corresponding to the starting point position of the turning angle of the working depth detecting sensor 29 and the sensor arm 38 of the turning detecting sensor 36.

Next, the mounting structure of the socket interposed in the harness 42 that connects the motor of the electric cylinder 16 and the battery of the present machine will be described. The rear male socket 40 is screwed to the top mast 12. The bracket 44, which is fixed to the bracket 41 by bolts and screwed to the female socket 43 at the front part, pivots the lower part thereof in the vicinity of the top hook 7c of the hitch frame 7 by a lateral fulcrum shaft 7b so as to be rotatable forward and backward. Along with the return spring 45, it is urged to rotate rearward, and its rear surface is received by an operating lever 48 fixed to the upper end of the lock hook operating rod 47, and the lower portion of the lock hook operating rod 47 is left and right. And is connected to the lock hook 47a, and the operating lever 48 is pierced in the top hook 7c while being pulled backward by the spring. It is fitted in the L-shaped guide groove 48a provided.

Further, the lower connecting pin 50 of the tiller is fitted into the lower hook 51 fixed to both lower sides of the hitch frame 7, and the lock hook 47a is connected to the lower connecting pin 50. Is located at the lower front end of the guide groove 48a, whereby the bracket 44 pivots rearward about the fulcrum shaft 7b, so that the socket is in the connected state, and the driver in the driver's seat operates rearward to remove the work implement. When the control lever 48 is extended and pulled forward and then moved upward, the bracket 44 and the female socket 43 attached to the bracket 44 are pivoted forward around the downward direction to be in the forward tilted posture, and the lock hook is engaged. Since 47a rotates upward to be in the unlocked posture, if the hitch frame 7 and the tiller 9 are lowered and grounded in this state, the tiller 9 is connected to the upper connecting pin. Pivots rearward so as to separate from the hitch frame 7 around the hook, so that the lower connecting pin 50 comes out of the lower hook 51. Then, when the hitch frame 7 is lowered, the upper hook a lowers and comes out of the upper connecting pin. At that time, the bracket 44 and the female socket 43 rotate forward and retract from the rear male socket 40. Therefore, both parties will not interfere. Further, the bracket 41 to which the male socket 40 is attached is screwed with a cover 49 that covers the rear surface and the outer surface of the socket to prevent water from splashing when washing, raining or scratching. I am doing it.

12 and 13 show another example of the socket, in which stainless steel contact pieces 52, 52 are provided inside the body 43a of the female socket 43 made of insulating synthetic resin, The brush 53 is fixed to the. Contact pieces 56, 56 made of stainless steel are embedded on both sides of a projecting piece 55 provided at the center of the body 54 of the male socket 40 made of the synthetic resin, and when the both sockets are joined, the brush 53 comes into contact. Since the dust attached to the pieces 56, 56 is scraped off, good contact is obtained, and the contact pieces 52, 56 do not rust even after long-term use. Reference numerals 57 and 58 are mounting bolts which also serve as terminals. Reference numeral 59 is a drain hole.

[0019]

[Effect of the device]

 According to the present invention, a hitch frame 7 is attached to a rear portion of the tractor main unit via a link, a working machine having an electric device is detachably connected to the hitch frame 7, and the electric device is connected to the main unit. An interrupting socket is provided near the work machine attachment / detachment part of the electric cord.One of the sockets is attached to the front part of the work machine, the other is attached to the hitch frame, and at least one socket is attached in the lateral direction. It is pivotally supported by a support shaft so as to rotate back and forth, and one socket is detached from the other socket when removing the work machine. Therefore, when removing the work machine from the hitch frame 7, When the hitch frame 7 is lowered after being grounded, the front socket attached to the hitch frame 7 descends while approaching the rear socket, but the retractable rotation about the spindle is performed. This causes the two to interfere It is not broken. In addition, when the working machine is connected, it is rotated in the opposite direction, so that the socket can be securely connected while the lateral contact is restricted by the lateral support shaft.

[Brief description of drawings]

FIG. 1 is a side view in which a cultivator is attached to a tractor.

FIG. 2 is a plan view of the front part of the tiller.

FIG. 3 is a side view of the tilling depth control device.

FIG. 4 is a side view of a turning rail control device.

FIG. 5 is a front view of a hitch frame.

FIG. 6 is a plan view of a socket combined state.

FIG. 7 is a side view of the same.

FIG. 8 is a side view showing a state where the sockets are separated from each other.

FIG. 9 is a side view showing a state where the hitch frame is lowered.

FIG. 10 is a side view of the detector.

FIG. 11 is a side view of the locking device.

FIG. 12 is a sectional view of another example of the socket in a joined state.

FIG. 13 is a sectional view of the same as above, in a separated state.

[Explanation of symbols]

 1 mission case 6 top link 7 hitch frame 7b fulcrum shaft 9 tilling device 11 gear case 15 turning rail 17 rear cover 20 link 21 wire 22 input shaft cover 27 roller 29 tilling depth detecting sensor 36 turning detecting sensor 38 sensor arm 39 spring 40 male Socket 43 Female Socket 44 Bracket

Claims (1)

[Scope of utility model registration request] 1. An electric machine for attaching a hitch frame 7 to a rear portion of a tractor main unit via a link, detachably connecting a working machine having an electric device to the hitch frame 7, and connecting the electric device to the main unit. An interrupting socket is inserted near the work machine attachment / detachment part of the cord, and one of the sockets is attached to the front part of the work machine.
The other is attached to the hitch frame 7, and at least one of the sockets is pivotally supported by a lateral support shaft so as to rotate back and forth, and at the time of removing the working machine, one socket is detachably rotated with respect to the other socket. A tractor hitch characterized by being constructed.