JP5564386B2 - Power harness connection structure of work equipment connection device - Google Patents

Description

  The present invention relates to a power harness connecting structure for a work implement connecting apparatus that automatically connects a work implement to a tractor.

  Conventionally, a connecting frame is connected to the tractor vehicle body via a three-point link mechanism, and an upper connecting portion and a pair of left and right lower connecting portions are formed on the connecting frame, and an upper engaging portion and a pair of left and right lower portions are formed on the work implement. An engaging portion is provided, and the upper connecting portion scoops up the upper engaging portion, thereby swinging the work machine around the upper engaging portion and engaging the pair of lower engaging portions with the pair of lower engaging portions. There is one in which a work machine is detachably and automatically connected to a tractor body.

In this type of conventional power harness connection structure for a work machine connection device, a series of a harness on the connection frame side connected to the power source of the tractor body and a harness on the work machine side connected to the electrical equipment mounted on the work machine. The connection is made by manual fixing operation of the lower connecting portion, which is a connecting operation (for example, Patent Document 1).

Utility Model Registration No. 2560877

Therefore, conventionally, in the last step of automatically connecting the working machine to the tractor body in a detachable manner, the lower side connecting part is purposely fixed, and at the same time, the harness on the connecting frame side and the working machine side connected to the electrical equipment mounted on the working machine These harnesses were manually connected via male and female connectors.
In view of the above problems, the present invention has been operated at the connection position of the work implement so as to automatically connect the harnesses separately from the work implement connection device in which the lower connection portion is automatically connected and fixed and the fixing of the lower connection tool. It is an object of the present invention to provide a power harness connecting structure for a work machine connecting apparatus that can automatically and detachably attach a power harness at the same time when it is separated from the connecting position.

Specific means for solving the problems in the present invention are as follows.
In Claim 1, the connection frame 31 connected with the tractor vehicle body 2 so that raising / lowering was possible via the link mechanism 3 was provided, and the upper connection part 61 provided in this connection frame 31 was provided in the work implement 1 When the connection frame 31 is raised in the state of being engaged with 51, the work implement 1 swings around the axis in the left-right direction around the upper engagement portion 51 so as to approach the connection frame 31. A connecting frame side harness 67 connected to the power source of the tractor vehicle body 2 is arranged in the connecting frame 31 so as to be automatically connected to the connecting frame 31, and is connected to the electric equipment 43 mounted on the work machine 1. Arrange the work equipment side harness 68,
A male connector 71 is provided on one of the connection frame side harness 67 and the work machine side harness 68, and a female connector 72 that can be fitted to the male connector 71 is provided on the other side, so that the connection frame 31 and the work machine 1 reach the connection position. It is a power harness connecting structure of a work machine connecting device that engages the male connector 71 and the female connector 72 in conjunction with each other,
The male connector 71 includes a male bottom wall 75 provided on one end in the front-rear direction, a male guide surface 78 that tapers in the front-rear direction toward the male bottom wall 75, and the male bottom between the male guide surfaces 78. The female connector 72 has a pair of male terminals for connection disposed on the wall 75, and the female connector 72 slides on the female guide wall 78 corresponding to the male bottom wall 75 of the male connector 71 and the male guide surface 78 when fitted. A female guide surface 83 capable of moving guidance, and a pair of female terminals for connection arranged on the female bottom wall 80 between the female guide surfaces 83;
As the working machine 1 swings around the upper engaging portion 51, the male guide surface 78 and the female guide surface 83 are in sliding contact with each other in the vertical direction, and the male guide surface 78 and the female guide surface The guide surface 83 is in surface contact with the male connector 71 and the female connector 72, and the terminals provided on the connectors 71 and 72 are connected to each other .
The male side terminals 85 and 86 are constituted by a male side positive terminal 85 and a male side negative terminal 86, and these male side terminals 85 and 86 are arranged at the same distance from the swing axis of the working machine 1 and to the left and right. Arranged,
The female terminals 87, 88 are composed of a female positive terminal 87 and a female negative terminal 88, and the female terminals 87, 88 are equidistant from the swing axis of the work machine 1 and arranged side by side. It is in the point where it is arranged .

In Claim 2, the connection frame 31 connected with the tractor vehicle body 2 so that raising / lowering is possible via the link mechanism 3 was provided, and the upper connection part 61 provided in this connection frame 31 was provided in the work implement 1 When the connection frame 31 is raised in the state of being engaged with 51, the work implement 1 swings around the axis in the left-right direction around the upper engagement portion 51 so as to approach the connection frame 31. A connecting frame side harness 67 connected to the power source of the tractor vehicle body 2 is arranged in the connecting frame 31 so as to be automatically connected to the connecting frame 31, and is connected to the electric equipment 43 mounted on the work machine 1. Arrange the work equipment side harness 68,
A male connector 71 is provided on one of the connection frame side harness 67 and the work machine side harness 68, and a female connector 72 that can be fitted to the male connector 71 is provided on the other side, so that the connection frame 31 and the work machine 1 reach the connection position. It is a power harness connecting structure of a work machine connecting device that engages the male connector 71 and the female connector 72 in conjunction with each other,
The male connector 71 includes a male bottom wall 75 provided on one end in the front-rear direction, a male guide surface 78 that tapers in the front-rear direction toward the male bottom wall 75, and the male bottom between the male guide surfaces 78. The female connector 72 has a pair of male terminals for connection disposed on the wall 75, and the female connector 72 slides on the female guide wall 78 corresponding to the male bottom wall 75 of the male connector 71 and the male guide surface 78 when fitted. A female guide surface 83 capable of moving guidance, and a pair of female terminals for connection arranged on the female bottom wall 80 between the female guide surfaces 83;
The male side terminals 85 and 86 are constituted by a male side positive terminal 85 and a male side negative terminal 86, and these male side terminals 85 and 86 are arranged at the same distance from the swing axis of the working machine 1 and to the left and right. Arranged,
The female terminals 87, 88 are composed of a female positive terminal 87 and a female negative terminal 88, and the female terminals 87, 88 are equidistant from the swing axis of the work machine 1 and arranged side by side. It is what is arranged .
According to a third aspect of the present invention, in the first or second aspect of the invention, at least one of the male connector 71 and the female connector 72 is supported so as to be swingable left and right.
According to a fourth aspect of the present invention, in the first or second aspect of the invention, the male guide surface 78 of the male connector 71 has upper, lower, left and right surfaces, and the female guide surface 83 of the female connector 72 can face the male guide surface 78. It has top, bottom, left and right surfaces,
The male guide surface 78 and the female guide surface 83 are slidably guided in the vertical direction and the horizontal direction by the operation of the working machine 1 swinging around the upper engagement portion 51 to fit the male connector 71 and the female connector 72. It is something to be combined.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the male connector 71 has a pyramidal male peripheral wall 99 that is tapered toward the male bottom wall 75. The outer peripheral surface is a male guide surface 78, the female connector 72 has a pyramidal female peripheral wall 100 that is tapered toward the female bottom wall 80, and the inner surface of the female peripheral wall 100 is a female guide surface 83. Is.
In claim 6 , in the invention of any one of claims 1 to 5 , one terminal of the male terminals 85, 86 or the female terminals 87, 88 is fixed to the bottom wall, and the other terminal is one of the terminals. There are provided urging means 93 and 94 which are movable forwardly toward the terminal and urge toward one terminal.

According to a seventh aspect of the present invention, in the invention of any one of the first to fifth aspects, the one of the male terminals 85 and 86 or the female terminals 87 and 88 is a pair of sandwiching pieces 102 that can be expanded by elastic deformation. The other terminal is formed in a rod shape that is removably fitted between the holding pieces 102 of the one terminal.

  According to the first aspect, the female guide surface and the male guide surface are slidably guided while the work implement is connected to the tractor body, and the male connector and the female connector are connected in conjunction with the connection operation of the work implement. The male side terminal and the female side terminal are automatically connected, and power can be supplied from the power source on the tractor side to the electrical equipment on the work machine side. In addition, when the work implement is removed from the tractor body, the female guide surface and the male guide surface are slid and guided, and the connection between the male connector and the female connector is released in conjunction with the removal operation of the work implement. The connection between the side terminal and the female side terminal is automatically disconnected. Therefore, when attaching and detaching the terminals, the power supply is linked to the attachment and detachment of the work implement only by the hydraulic lifting / lowering operation force of the link mechanism used at the time of connection operation, and without applying a load for connection to the lock operation of the lower connection body. The harness can also be automatically attached and detached at the same time, and it becomes possible to attach and detach the power supply without having to get on and off the operator's tractor on a work machine that uses electricity, and the power harness is broken due to forgetting to remove the power harness when the work machine is attached or detached There will be no accidents.

According to the second aspect, even if there is a slight shift between the connectors, one connector can swing left and right to correct the shift and easily connect.
According to the third aspect, after connecting the upper connecting portion, the lower connecting portion is swung back and forth around the upper connecting portion, and at this time, the connector is also slid in the front and back and up and down directions. The mud that has entered between the left and right female side walls easily falls.

According to the fourth aspect, the male connector and the female connector are fitted in conjunction with the connection of the work machine to the tractor vehicle body, and the male connector and the female connector are regulated to be vertically and horizontally positioned by this fitting, The male terminal and the female terminal are securely and smoothly connected.
According to the fifth aspect, the male terminal and the female terminal can be reliably connected by the biasing force of the biasing means in conjunction with the connection between the male connector and the female connector. Further, the male terminal and the female terminal can be smoothly separated in conjunction with the separation operation of the male connector and the female connector.

  According to claim 6, in conjunction with the connecting operation of the male connector and the female connector, the other terminal can be elastically held by the pair of holding pieces of the one terminal, and the connection between the male side terminal and the female side terminal is achieved. Can be surely done.

It is a plane sectional view of a connector portion showing a 1st embodiment of the present invention. It is a side view which shows the state which connected the working machine to the tractor. It is a side view which shows the state which removed the working machine from the tractor. It is a perspective view of the connection frame. It is a plane sectional view of a connector portion showing a 2nd embodiment. It is a perspective view of the connector part which shows 3rd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show the first embodiment, and in FIGS. 2 and 3, reference numeral 1 indicates that the rotary tilling work, the chemical spraying work, the fertilizing work, and the upsetting work can be performed simultaneously (one step) at a time. The working machine 1 is attached to the rear portion of the tractor vehicle body 2 via a three-point link mechanism 3 so as to be movable up and down.

The three-point link mechanism 3 includes an upper top link 28 and a pair of lower left and right lower links 29, and the front end side of the top link 28 is attached and fixed to the rear portion of the tractor vehicle body 2. The front end of the left and right lower link 29 is pivotally attached to the rear portion of the tractor vehicle body 2 via a ball joint or the like.
The rear ends of the top link 28 and the left and right lower links 29 are pivotally attached to a connecting frame 31 connected to the work machine 1 via a ball joint or the like.

  A hydraulic device 32 for raising and lowering the work implement is provided at the rear part of the tractor vehicle body 2, and the hydraulic device 32 includes a pair of left and right lift arms 33, and the left and right lift arms 33 are connected to the left and right via lift rods 34. It is connected to the lower link 29, and the left and right lift arms 33 swing up and down, so that the three-point link mechanism 3 swings up and down, whereby the work implement 1 can be lifted and lowered. Yes.

The working machine 1 includes a rotary tiller 4, a ridge former 5, a medicine supply device 6, and a fertilizer 7.
In the present embodiment, the rotary tiller 4 employs a side drive type rotary, and includes a machine frame 8, a rotary tiller 9, a tiller cover 10, and a support frame 12 that attaches and supports a pair of left and right gauge wheels 11. I have.

The machine frame 8 has left and right support arms 15 projecting from the gear case 14 at the center in the left-right direction, a transmission case 16 attached to the outer end of the left support arm 15, and a side frame attached to the outer end of the right support arm 15. It is configured as a frontal portal.
A top mast 35 is fixed on the gear case 14, and the top mast 35 and the left and right support arms 15 are pivotally connected to the connection frame 31 in a detachable manner.

  The rotary tiller 9 includes a claw shaft 17 having a left and right axial center rotatably supported between lower portions of the transmission case 16 and the side frame, and a plurality of rotary tillers 9 mounted and fixed on the claw shaft 17 in the axial direction. The tillage claw 18 rotates around the axis of the claw shaft 17 and enters the soil by rotating the claw shaft 17 about the axis. Is configured to be cultivated and crushed.

Further, the power is transmitted from the PTO shaft 19 of the tractor body 2 to the transmission mechanism in the gear case 14 by the PIC shaft of the work machine 1 through the universal joint, and from the gear case 14 to the transmission shaft in the left support arm 15 and the transmission case 16. The claw shaft 17 is rotationally driven in the direction of arrow B by the power transmitted through the internal transmission mechanism.
The support frame 12 has a front end pivotally attached to the support arm 15 so as to be rotatable about a left and right axis, and a rear end side of the support frame 12 has a tool bar 36 arranged in the left and right direction. The gauge ring 11 is attached to the lower end of the support post 37 attached to both sides so as to be rotatable around the left and right axes.

Further, the support frame 12 can swing up and down around the pivot portion on the front end side by an elevating operation mechanism 26 provided between the support frame 12 and the top mast 35.
The cocoon molding machine 5 stands the cocoon R with the soil cultivated by the rotary cultivator 9. The drug supply device 6 includes a drug tank 38 that stores a drug, and the fertilizer application device 7 includes a fertilizer tank 39 that stores fertilizer. The drug tank 38 and the fertilizer tank 39 are attached to a support device 40.

The medicine tank 38 and the fertilizer tank 39 are provided with a feeding device at the lower part thereof, so that the medicine can be discharged from the feeding port at the lower end of the medicine tank 38 and the fertilizer can be discharged from the feeding port at the lower end of the fertilizer tank 39. It is said.
The feeding device for the fertilizer tank 39 has a drive motor 43, and the fertilizer is discharged by driving the drive motor 43.

The drug supply device 6 includes a pair of right and left drug conduits 45 that guide the drug discharged from the drug tank 38 to the front side of the rotary tiller 9.
The fertilizer applicator 7 is provided with a pair of left and right fertilizer conduits 46 that guide the fertilizer discharged from the fertilizer tank 39 into the soil in the paddle former 5.
A pin at the front upper end of the top mast 35 of the work machine 1 forms an upper engagement portion 51 to be engaged with an upper connection portion 61 of a connection frame 31 described later, and is connected to the support arm 15 via left and right connection brackets. The provided pin forms a lower engaging portion 52 that is engaged with a left and right lower connecting portion 63 of the connecting frame 31 described later.

As shown in FIG. 4, a connecting frame 31 incorporated as a connecting device has a main frame 55 formed in a substantially A shape in a rear view with a square pipe (or round pipe, flat bar or the like). The upper body 56 is fixed to the center upper part of the frame 55, the lower body 57 is fixed to the left and right lower parts, and the left and right middle parts of the main frame 55 are connected to the main frame 55 by the upper reinforcing material 59 made of the same material.
The upper body 56 is connected to the rear connecting portion of the top link 28, and a concave upper connecting portion 61 is formed at the rear portion thereof. The upper connecting portion 61 is engaged with the upper engaging portion 51 of the work machine 1.

A lower link pin 62 protrudes outwardly from a portion of the lower body 57 protruding forward and downward, and is connected to a rear connection portion of the lower link 29. Forming. The lower connecting portion 63 engages with the lower engaging portion 52 of the work machine 1.
A lock member 65 is rotatably supported on the lower body 57 via a horizontal shaft 66, and the lock member 65 can be engaged with a lower engagement portion 52 that is engaged with a lower connection portion 63. The engagement prevents the lower engagement portion 52 from being detached from the lower connection portion 63.

  Thus, by lifting up the upper engagement portion 51 with the upper connection portion 61, the work implement 1 is swung around the upper engagement portion 51, and the pair of lower engagement portions 52 are connected to the pair of lower connection portions 63. The work implement 1 is detachably and automatically connected to the tractor body 2 by being engaged. Although not shown in the drawing, the PTO shaft 19 projecting rearward from the tractor body 2 and the PIC shaft of the work machine 1 are automatically linked in conjunction with the attachment / detachment of the work machine 1 via the universal joint. It has become.

In FIG. 1 to FIG. 3, a connecting frame side harness 67 connected to the power source of the tractor vehicle body 2 is arranged in the connecting frame 31, and connected to a drive motor 43 (electric equipment mounted on the work machine 1) of the fertilizer tank 39. A work machine side harness 68 is arranged. The connection frame side harness 67 and the work machine side harness 68 constitute a power harness 69.
A male connector 71 is provided in the work implement side harness 68, and the male connector 71 is formed of an insulating synthetic resin or the like, and is provided in a middle portion in the vertical direction on the front side of the top mast 35 of the work implement 1.

A female connector 72 that can be fitted to the male connector 71 is provided in the connecting frame side harness 67. The female connector 72 is made of an insulating synthetic resin or the like, and is provided on the upper reinforcing member 59 of the connection frame 31.
At least one of the male connector 71 and the female connector 72 is supported so as to be able to swing left and right. Note that at least one of the male connector 71 and the female connector 72 may be supported so as to be swingable up and down.

In FIG. 1, the male connector 71 has a male bottom wall 75 on the front end side, and has upper and lower male side walls 76 and left and right male side walls 77 that are tapered toward the male bottom wall 75. An outer surface of each of the male side walls 76 and 77 is a male guide surface 78, and the male guide surface 78 tapers forward toward the male bottom wall 75.
The female connector 72 has a female bottom wall 80 corresponding to the male bottom wall 75 of the male connector 71, and has an upper and lower female side wall 81 and a left and right female side wall 82 that are tapered toward the female bottom wall 80. 81 and 82 are female guide surfaces 83, and the female guide surfaces 83 can be slidably guided to the male guide surfaces 78, and the male connector 71 and the female connectors are interlocked with the attachment and detachment of the work machine 1 with respect to the connection frame 31. The connector 72 is detachably fitted.

A male-side plus terminal (male-side terminal) 85 and a male-side minus terminal (male-side terminal) 86 are provided on the male bottom wall 75 apart from each other. A female-side plus terminal (female-side terminal) 87 and a female-side minus terminal (female-side terminal) 88 are provided on the female bottom wall 80 apart from each other. The female negative terminal 88 is grounded to the tractor vehicle body 2 via the connecting frame side harness 67.
The female-side plus terminal 87 and the female-side minus terminal 88 have a large-diameter portion 89 and a shaft portion 90. The large-diameter portion 89 is embedded in the female bottom wall 80, and the tip side of the shaft portion 90 projects forward from the female bottom wall 80. The female positive terminal 87 and the female negative terminal 88 are respectively embedded and fixed in the female bottom wall 80, and an insertion recess 91 is provided behind the large-diameter portion 89 of the female bottom wall 80.

  The male side positive terminal 85 and the male side negative terminal 86 are formed in a long bar shape, and are inserted and held in the male bottom wall 75 so as to be movable back and forth. A positive terminal urging means 93 that urges the male positive terminal 85 toward the female positive terminal 87 and a negative terminal urging means 94 that urges the male negative terminal 86 toward the female negative terminal 88. Is provided. The positive terminal urging means 93 and the negative terminal urging means 94 have a rear spring receiver 95 protruding from the male side wall 76 or the male side wall 77, and a front spring receiver 96 fixed to the male side negative terminal 86, A male negative terminal 86 is inserted into the rear spring receiver 95 so as to be movable back and forth, and a compression coil spring 97 is provided between the front spring receiver 96 and the rear spring receiver 95. Therefore, the male positive terminal 85 and the male negative terminal 86 are urged forward by the compression coil spring 97, and the distal ends of the male positive terminal 85 and the male negative terminal 86 are inserted into the insertion recess 91, so that the female positive terminal 86 is inserted. It is pressed against the large diameter portion 89 of the terminal 87 and the female negative end, whereby the male positive terminal 85 and the female positive terminal 87 are connected, and the male negative terminal 86 and the female negative terminal 88 are connected. It has come to be.

  Thus, the male positive terminal 85 and the female positive terminal 87 correspond to each other, the male negative terminal 86 and the female negative terminal 88 correspond to each other, and the male positive terminal 85 and the male negative terminal. 86 are supported so as to be movable forwardly toward the female plus terminal 87 or the female minus terminal 88, respectively, and the male connector 71 and the female connector 72 are detachable in conjunction with the attachment and detachment of the work machine 1 with respect to the connecting frame 31. The male positive terminal 85 and the female positive terminal 87 are connected, and the male negative terminal 86 and the female negative terminal 88 are connected.

According to the above embodiment, when the work implement 1 is connected to the tractor vehicle body 2, the work implement lifting / lowering hydraulic device 32 is operated to raise the upper engagement portion 51 by the upper connection portion 61. 1 is swung around the upper engagement portion 51, and the pair of lower engagement portions 52 are engaged with the pair of lower connection portions 63, so that the work implement 1 can be automatically connected to the tractor vehicle body 2.
At this time, the female connector 72 and the male connector 71 approach each other, the female guide surface 83 and the male guide surface 78 are slidably guided, and the male connector 71 and the male connector 71 are interlocked with the attachment / detachment of the work machine 1 with respect to the connection frame 31. The female connector 72 is detachably fitted. By this fitting, the male connector 71 and the female connector 72 are positioned and regulated in the vertical and horizontal directions. In addition, the positive terminal biasing means 93 biases the male positive terminal 85 toward the female positive terminal 87, and the negative terminal biasing means 94 biases the male negative terminal 86 toward the female negative terminal 88. Therefore, when the male connector 71 and the female connector 72 are fitted together, the male positive terminal 85 and the female positive terminal 87 are automatically and reliably connected to each other, and the male negative terminal 86 is connected. And the female negative terminal 88 are automatically and smoothly connected to each other, and power can be supplied from the power source on the tractor body 2 side to the drive motor 43 (electric device) on the work machine 1 side. Accordingly, the work implement 1 is automatically connected to the tractor body 2 and, at the same time, the drive motor 43 is driven by the power source on the tractor body 2 side so that the fertilizer can be discharged.

  When the work implement 1 is removed from the tractor vehicle body 2, the work implement 1 lifting / lowering hydraulic device 32 is operated to ground the work implement 1, and then the lower member 57 is unlocked by the lock member 65, The hydraulic device 32 is operated to lower the connection frame 31 to disengage the upper engagement portion 51 from the upper connection portion 61 and to engage the pair of lower engagement portions 52 with the pair of lower connection portions 63. The work machine 1 can be removed from the tractor vehicle body 2 by moving the tractor vehicle body 2 slightly forward.

At this time, the female connector 72 and the male connector 71 are separated from each other, and the male connector 71 and the female connector 72 are disengaged in conjunction with the detaching operation of the work machine 1 with respect to the connection frame 31. The connection with the female positive terminal 87 is automatically disconnected, and the connection between the male negative terminal 86 and the female negative terminal 88 is automatically disconnected.
Accordingly, the power harness 69 can be automatically attached / detached simultaneously with the attachment / detachment of the work implement 1, and the work implement 1 using electricity can be attached / detached without getting on and off the operator's tractor. (1) A disconnection accident of the power harness 69 due to forgetting to remove the power harness 69 at the time of attachment / detachment is eliminated.

  FIG. 5 shows a second embodiment, and the female bottom wall 80 is provided with insertion holes 101 corresponding to the female positive terminal 87 and the female negative terminal 88. The female positive terminal 87 and the female negative terminal 88 are It has a pair of clamping pieces 102 that can be expanded by elastic deformation. The base end portions of the pair of sandwiching pieces 102 are embedded and fixed in the female bottom wall 80 from the insertion hole 101, and the distal ends of the pair of sandwiching pieces 102 are bent into a waveform and project forward from the insertion hole 101. The male side plus terminal 85 and the male side minus terminal 86 are formed in a rod shape that is removably fitted between the holding pieces 102 of the female side plus terminal 87 or the female side plus terminal 87.

Thus, the male connector 71 and the female connector 72 are detachably fitted in conjunction with the attachment and detachment of the work machine 1 with respect to the connection frame 31, whereby the male positive terminal 85 and the female positive terminal 87 are connected. The male negative terminal 86 and the female negative terminal 88 are connected. The other points are the same as those in the first embodiment.
In the case of this second embodiment, the male positive terminal 85 can be elastically held by the holding piece 102 of the female positive terminal 87 in conjunction with the connecting operation of the male connector 71 and the female connector 72, and the female negative terminal The male negative terminal 86 can be elastically clamped by the clamping pieces 102 of 88, and the male positive terminal 85 and the female positive terminal 87 can be securely connected. The male negative terminal 86 and the female negative terminal 88 are also provided. Connection with can be made reliably. Further, in conjunction with the separation operation of the male connector 71 and the female connector 72, the male positive terminal 85 or the male negative terminal 86 is held by the pair of holding pieces 102 of the female positive terminal 87 and the female negative terminal 88. It can be smoothly released, and the male positive terminal 85 and the female positive terminal 87 can be reliably disconnected, and the male negative terminal 86 and the female negative terminal 88 can be reliably disconnected.

FIG. 6 shows a third embodiment. The male connector 71 and the female connector 72 are disposed long in the vertical direction, and the male connector 71 is fixed to the middle part of the front side of the top mast 35 of the work machine 1. The female connector 72 is fixed to the upper reinforcing member 59 or the like of the connection frame 31.
The male connector 71 has a male bottom wall 75 on the front end side and left and right male side walls 77 that are tapered toward the male bottom wall 75. The outer surface of the male side wall 77 is a male guide surface 78, and the male guide surface 78 tapers forward toward the male bottom wall 75.

  The female connector 72 has a female bottom wall 80 corresponding to the male bottom wall 75 of the male connector 71, and has left and right female side walls 82 that taper toward the female bottom wall 80. The female guide surface 83 is slidably guided on the male guide surface 78, and the male connector 71 and the female connector 72 can be freely attached / detached in conjunction with the attachment / detachment of the work machine 1 with respect to the connection frame 31. It is designed to fit in.

  A male-side plus terminal 85 and a male-side minus terminal 86 are provided on the male bottom wall 75 so as to be spaced apart from each other in the vertical direction. A female-side plus terminal 87 and a female-side minus terminal 88 are provided on the female bottom wall 80 so as to be spaced apart from each other in the vertical direction. The male side positive terminal 85 and the male side negative terminal 86 of the male bottom wall 75 and the female side positive terminal 87 and the female side negative terminal 88 of the female bottom wall 80 may be formed as in the embodiment of FIG. Alternatively, it may be formed as in the second embodiment, and the male connector 71 and the female connector 72 are detachably fitted in conjunction with the attachment and detachment of the work machine 1 with respect to the connection frame 31, so that the male side plus A terminal 85 and a female-side plus terminal 87 are connected, and a male-side minus terminal 86 and a female-side minus terminal 88 are connected. The other points are the same as those in the first embodiment.

  In the above embodiment, the work machine side harness 68 is connected to the drive motor 43 of the fertilizer tank 39 as an electric device mounted on the work machine 1, but instead of this, a drive motor for feeding the drug to the drug tank 38. In this case, the work machine side harness 68 may be connected to a drug delivery drive motor, or the work machine side harness 68 may be connected to the fertilizer tank 39 drive motor 43 and the drug delivery drive motor. You may make it connect to both. Further, a motor or other electrical device that drives the car wash pump may be mounted on the work machine 1 side, and the work machine side harness 68 may be connected thereto.

In addition, a male connector 71 may be provided in the connection frame side harness 67, and a female connector 72 that can be fitted to the male connector 71 may be provided.
In the first embodiment, the positive terminal urging means 93 that urges the male positive terminal 85 toward the female positive terminal 87 and the male negative terminal 86 urges toward the female negative terminal 88. Negative terminal urging means 94 is provided. Instead, positive terminal urging means for urging the female positive terminal 87 toward the male positive terminal 85 is provided, and the female negative terminal 88 is It is also possible to provide a minus terminal biasing means for biasing toward the side minus terminal 86.

  In the second embodiment, the female positive terminal 87 and the female negative terminal 88 have a pair of clamping pieces 102 that can be expanded by elastic deformation. Instead, the male positive terminal 85 and the male positive terminal 85 are provided. The side minus terminal 86 is provided with a pair of holding pieces 102 that can be expanded by elastic deformation, and the female plus terminal 87 and the female minus terminal 88 are formed in a rod shape that is removably fitted between the holding pieces 102. You may do it.

Further, the male connector 71 has only the upper and lower male side walls 76 that taper toward the male bottom wall 75 as male side walls, and the female connector 72 correspondingly tapers toward the female bottom wall 80 as a female side wall. The upper and lower female side walls 81 may be provided.
In the above-described embodiment, one male connector 71 is provided with a male positive terminal 85 and a male negative terminal 86, and one female connector 72 is provided with a female positive terminal 87 and a female negative terminal 88. However, instead of this, one male connector 71 is provided with one male side plus terminal (male side terminal) 85 and one female connector 72 is provided with one female side plus terminal (female side terminal) 87. It is also possible to return the aircraft ground.

DESCRIPTION OF SYMBOLS 1 Work implement 3 Three-point link mechanism 67 Connection frame side harness 68 Work implement side harness 69 Power supply harness 71 Male connector 72 Female connector 75 Male bottom wall 76 Vertical male side wall 77 Left and right male side wall 78 Male guide surface 80 Female bottom wall 81 Vertical female Side wall 82 Left and right female side walls 83 Female guide surface 85 Male positive terminal 86 Male negative terminal 87 Female positive terminal 88 Female negative terminal 93 Positive terminal biasing means 94 Negative terminal biasing means 102 Holding piece

Claims (7)

The tractor body (2) is provided with a connecting frame (31) connected to the tractor body (2) through a link mechanism (3) so as to be movable up and down, and the upper connecting portion (61) provided on the connecting frame (31) is attached to the work machine (1). By raising the connecting frame (31) in a state of being engaged with the provided upper engaging portion (51), the upper engaging portion (51) is arranged so that the work machine (1) approaches the connecting frame (31). ) Around the axial center in the left-right direction and automatically connected to the connecting frame (31). The connecting frame side connected to the power source of the tractor vehicle body (2) is connected to the connecting frame (31). Arrange the harness (67), arrange the work implement side harness (68) connected to the mounted electric equipment (43) on the work implement (1),
A male connector (71) is provided on one of the connection frame side harness (67) and work implement side harness (68), and a female connector (72) that can be fitted to the male connector (71) is provided on the other side. 31) A power harness connection structure of a work machine connection device for fitting a male connector (71) and a female connector (72) in conjunction with each other when the work machine (1) reaches a connection position,
The male connector (71) includes a male bottom wall (75) provided on one end side in the front-rear direction, a male guide surface (78) tapering in the front-rear direction toward the male bottom wall (75), and the male guide A pair of male terminals for connection disposed on the male bottom wall (75) between the surfaces (78), and the female connector (72) is a male bottom wall (75) of the male connector (71). , A female guide surface (83) that can be slidably guided to the male guide surface (78) when fitted, and the female bottom wall (80) between the female guide surface (83). And a pair of female terminals for connection arranged in
By the operation in which the working machine (1) swings around the upper engagement portion (51), the male guide surface (78) and the female guide surface (83) are brought into contact with each other in the vertical direction to slide and guide, The male guide surface (78) and the female guide surface (83) are brought into surface contact with each other so that the male connector (71) and the female connector (72) are fitted and terminals provided on these connectors (71, 72). Configured to connect each other ,
The male terminal (85, 86) is composed of a male positive terminal (85) and a male negative terminal (86), and these male terminals (85, 86) swing the working machine (1). It is equidistant from the shaft center and arranged side by side,
The female side terminals (87, 88) are composed of a female side positive terminal (87) and a female side negative terminal (88), and these female side terminals (87, 88) swing the working machine (1). A power harness connection structure for a work machine connection device, wherein the power supply harness connection structure is equidistant from an axis and arranged side by side . The tractor body (2) is provided with a connecting frame (31) connected to the tractor body (2) through a link mechanism (3) so as to be movable up and down, and the upper connecting portion (61) provided on the connecting frame (31) is attached to the work machine (1). By raising the connecting frame (31) in a state of being engaged with the provided upper engaging portion (51), the upper engaging portion (51) is arranged so that the work machine (1) approaches the connecting frame (31). ) Around the axial center in the left-right direction and automatically connected to the connecting frame (31). The connecting frame side connected to the power source of the tractor vehicle body (2) is connected to the connecting frame (31). A harness (67) is arranged, and the working machine (1)
Arrange the work equipment side harness (68) connected to the mounted electrical equipment (43),
A male connector (71) is provided on one of the connection frame side harness (67) and work implement side harness (68), and a female connector (72) that can be fitted to the male connector (71) is provided on the other side. 31) A power harness connection structure of a work machine connection device for fitting a male connector (71) and a female connector (72) in conjunction with each other when the work machine (1) reaches a connection position,
The male connector (71) includes a male bottom wall (75) provided on one end side in the front-rear direction, a male guide surface (78) tapering in the front-rear direction toward the male bottom wall (75), and the male guide A pair of male terminals for connection disposed on the male bottom wall (75) between the surfaces (78), and the female connector (72) is a male bottom wall (75) of the male connector (71). , A female guide surface (83) that can be slidably guided to the male guide surface (78) when fitted, and the female bottom wall (80) between the female guide surface (83). And a pair of female terminals for connection arranged in
The male terminal (85, 86) is composed of a male positive terminal (85) and a male negative terminal (86), and these male terminals (85, 86) swing the working machine (1). It is equidistant from the shaft center and arranged side by side,
The female side terminals (87, 88) are composed of a female side positive terminal (87) and a female side negative terminal (88), and these female side terminals (87, 88) swing the working machine (1). A power harness connection structure for a work machine connection device, wherein the power supply harness connection structure is equidistant from an axis and arranged side by side . The power harness connection structure for the work machine connection device according to claim 1 or 2 , wherein at least one of the male connector (71) and the female connector (72) is supported so as to be swingable in the left-right direction. The male guide surface (78) of the male connector (71) has upper, lower, left and right surfaces, and the female guide surface (83) of the female connector (72) has upper, lower, left and right surfaces that can face the male guide surface (78). Have
The male guide surface (78) and the female guide surface (83) are slidably guided in the vertical direction and the horizontal direction by the operation of the work machine (1) swinging around the upper engagement portion (51). (71) and a female connector (72) are fitted, The power harness connection structure of the working machine connection apparatus of Claim 1 , 2 or 3 characterized by the above-mentioned. The male connector (71) has a pyramidal male peripheral wall (99) tapered toward the male bottom wall (75), and the outer peripheral surface of the male peripheral wall (99) is a male guide surface (78). The female connector has a pyramid-shaped female peripheral wall (100) tapered toward the female bottom wall (80), and the inner surface of the female peripheral wall (100) is a female guide surface (83). The power harness connection structure of the work machine connection device according to any one of claims 1 to 4 . One terminal of the male side terminal (85, 86) or the female side terminal (87, 88) is fixed to the bottom wall, and the other terminal is movable forwardly toward one terminal and directed toward one terminal. power harness connection structure of the work machine connecting device according to any one of claims 1 to 5, characterized in that biasing means (93, 94) is provided for biasing. One terminal of the male terminal (85, 86) or the female terminal (87, 88) is composed of a pair of clamping pieces (102) that can be expanded by elastic deformation, and the other terminal is the clamping of the one terminal. The power harness connecting structure for a work machine connecting device according to any one of claims 1 to 5 , wherein the power harness connecting structure is formed in a rod shape that is removably inserted between the pieces (102).

Images