JP5750475B2 - 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 to provide a power harness connecting structure for a work machine connecting device that can automatically and detachably attach a power harness in conjunction with each other when it is separated from the connecting position or prevents contact between harness terminals on the connecting frame side. .

Specific means for solving the problems in the present invention are as follows.
Female connectors 73 and 74 provided in a connection frame side harness 67 connected to the power source of the tractor vehicle body 2 are arranged on the connection frame 31 connected to the tractor vehicle body 2 via the link mechanism 3 and connected to the connection frame. The working machine 1 is provided with male connectors 71 and 72 that are provided on a working machine side harness 68 that is connected to the mounted electrical device 43 and faces the female connectors 73 and 74 .
The power supply harness connection structure of the work machine connecting device for fitting and said connecting frame 31 and the working machine 1 male connector 71 and 72 in conjunction with time and is serving reached a coupling position with the female connector 73 and 74,
The male connector 71 and female connector 73 and 74, respectively with provided one by one pair, each male connector 71 and the female connector 73 and 74 is provided with terminals for respective connection,
The female terminal 87 and 88 of the female connector 73 is made of expandable clamping strips 102 by elastic deformation, the male terminal 85 and 86 of the male connector 71 and 72, inserted between the front bellflower Jihen 102 It is formed in a rod shape that fits inside ,
On the outer surface of each of the male connectors 71 and 72, a male guide surface 78 having a conical shape extending rearward is formed,
On the inner surface of each female connector 73, there is provided a female guide surface 83 that is formed in a conical shape that extends rearward and into which the male guide surface 78 is inserted and fitted, and is located on the back side of each female guide surface 83. The female terminals 87, 88 are provided in the insertion hole 101 formed in the female bottom wall 80,
The female terminal 87 provided on one female connector 73 is a female positive terminal 87, the female terminal 88 provided on the other female connector 74 is a female negative terminal 88, and the female positive terminal 87 side. The female guide surface 83 and the female guide surface 83 on the female minus terminal 88 side are arranged independently of each other .

According to the present invention, while the work machine is connected to the tractor body, the two male connectors and the female connector are connected in conjunction with the connection operation of the work machine, and the male terminal and the female terminal are automatically connected. Connected, it is possible to supply power from the power source on the tractor side to the electrical equipment on the work machine side. Also, if you try to remove the work implement from the tractor body, the connection between the two male connectors and the female connector will be released in conjunction with the removal operation of the work implement, and the connection between the male and female terminals will automatically Fall off. Therefore, when attaching and detaching the terminals, only the hydraulic lifting / lowering operation force of the link mechanism used at the time of connection operation is used.
In addition, the power harness can be automatically attached and detached simultaneously with the attachment and detachment of the work implement without applying a load for connection to the lock operation of the lower coupling body, and the operator can get on and off the tractor in the work implement that uses electricity. The power supply can be attached / detached without any trouble, and there is no accident in which the power harness is broken due to forgetting to remove the power harness when attaching / detaching the work implement.

Moreover, since the two sets of male connector and female connector are provided, it is possible to prevent the terminals on the connection frame side from accidentally contacting each other when the work machine is attached or detached.
Further, in conjunction with the connecting operation of the male connector and the female connector, the other terminal can be elastically held by the holding piece of one terminal, and the connection between the male side terminal and the female side terminal can be surely made.

It is a plane sectional view of a connector portion showing one 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 other embodiments.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
2 and 3, reference numeral 1 denotes a working machine (a cocoon forming device) that can perform a rotary plowing operation, a chemical spraying operation, a fertilization operation, and a tapping operation all at once in a single operation. The work machine 1 is mounted on 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, the connecting frame 31 incorporated as a connecting device has a main frame 55 formed of a square pipe (or a round pipe, a flat bar, etc.) and has a substantially A-shape when viewed from the back. The middle part of the main frame 55 is connected to the main frame 55 by an upper reinforcing material 59 made of the same material, and the upper body 56 is fixed to the center upper part of the main frame 55 and the lower body 57 is fixed to the left and right lower parts. Yes.
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.
The work machine side harness 68 is provided with a first male connector 71 and a second male connector 72, each male connector 71, 72 is made of an insulating synthetic resin or the like, and on the front side of the top mast 35 of the work machine 1. They are spaced apart from each other in the middle in the vertical direction.

A first female connector 73 that can be fitted to the first male connector 71 and a second female connector 74 that can be fitted to the second male connector 72 are provided in the connecting frame side harness 67. The female connectors 73 and 74 are made of an insulating synthetic resin or the like, and are provided on the upper reinforcing member 59 of the connection frame 31 so as to be separated from each other on the left and right.
At least one of the first male connector 71 and the first female connector 73 is supported so as to be able to swing left and right. Further, at least one of the second male connector 72 and the second female connector 74 is supported so as to be able to swing left and right. It should be noted that at least one of the first male connector 71 and the first female connector 73 may be supported so as to be swingable up and down, and at least one of the second male connector 72 and the second female connector 74 may be supported. May also be supported so as to be swingable up and down.

In FIG. 1, the first male connector 71 and the second male connector 72 have a male bottom wall 75 on the front end side, and upper and lower male side walls 76 and left and right male side walls 77 that are tapered toward the male bottom wall 75. doing. 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 first female connector 73 and the second female connector 74 have a female bottom wall 80 corresponding to the male bottom wall 75 and have upper and lower female side walls 81 and left and right female side walls 82 that taper toward the female bottom wall 80. The inner surface of the female side walls 81 and 82 is a female guide surface 83, and the female guide surface 83 can be slidably guided to the male guide surface 78 in conjunction with the attachment and detachment of the work machine 1 with respect to the connection frame 31. The first male connector 71 and the first female connector 73 are detachably fitted, and the second male connector 72 and the second female connector 74 are detachably fitted.

  A male positive terminal (male terminal) 85 is provided on the male bottom wall 75 of the first male connector 71, and a female positive terminal (female terminal) 87 is provided on the female bottom wall 80 of the first female connector 73. Yes. A male negative terminal (male terminal) 86 is provided on the male bottom wall 75 of the second male connector 72, and a female negative terminal (female terminal) 88 is provided on the female bottom wall 80 of the second female connector 74. Yes. 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 are a rear spring receiver 95 protruding from the male side wall 76 or the male side wall 77, and a front spring receiver fixed to the male side positive terminal 85 and the male side negative terminal 86. 96, a male-side plus terminal 85 and a male-side minus terminal 86 are 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. Yes.

  Accordingly, the male positive terminal 85 and the male negative terminal 86 are urged forward by the compression coil spring 97, and the leading end of the male positive terminal 85 or the male negative terminal 86 is inserted into the insertion recess 91, so that the female positive terminal is inserted. The large diameter portion 89 of the terminal 87 or the female negative terminal 88 is pressed against each other, 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 to each other. Are to be connected.

Thus, the male positive terminal 85 of the first male connector 71 and the female positive terminal 87 of the first female connector 73 correspond to each other, and the male negative terminal 86 of the second male connector 72 and the second female connector 74. The female negative terminal 88 of the first male connector 71 and the male negative terminal 86 of the second male connector 72 are respectively connected to the female negative terminal 88 of the first female connector 73. Alternatively, the first male connector 71 and the first female connector 73 are supported so as to be movable in the forward direction toward the female negative terminal 88 of the second female connector 74 and interlocked with the attachment and detachment of the work machine 1 with respect to the connection frame 31. The second male connector 72 and the second female connector 74 are detachably fitted together so that the male positive terminal 85 and the female positive terminal 87 are connected, and the male minor is connected. And the terminal 86 and the female-side minus terminal 88 is adapted to be 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 first male connector 71 and the first female connector 73 approach each other, the second male connector 72 and the second female connector 74 approach each other, and the female guide surface 83 and the male guide surface 78 slide. The first male connector 71 and the first female connector 73 are detachably fitted in conjunction with the attachment and detachment of the work machine 1 with respect to the connection frame 31, and the second male connector 72 and the second female connector 74 are connected. Fits detachably. By this fitting, the first male connector 71 and the first female connector 73 are positioned and regulated in the vertical and horizontal directions, and the second male connector 72 and the second female connector 74 are 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 first male connector 71 and the first female connector 73 are fitted, the male side positive terminal 85 and the female side positive terminal 87 are automatically and reliably connected to each other. By fitting the two male connector 72 and the second female connector 74, the male minus terminal 86 and the female minus terminal 88 are automatically and smoothly connected to each other. Electric power can be supplied to the drive motor 43 (electric device) on the first 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 first male connector 71 and the first female connector 73 are separated from each other, and the second male connector 72 and the second female connector 74 are separated from each other, and interlocked with the removal operation of the work machine 1 with respect to the connection frame 31. Then, the first male connector 71 and the first female connector 73 are disengaged and the second male connector 72 and the second female connector 74 are disengaged. The male positive terminal 85 and 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 also eliminated.
In addition, the first male connector 71 and the second male connector 72 are provided apart from each other, and the first female connector 73 and the second female connector 74 correspond to the first male connector 71 and the second male connector 72, respectively. Since they are spaced apart from each other, the male positive terminal 85 and the female negative terminal 88 accidentally contact each other when the work machine 1 is attached or detached, or the male negative terminal 86 and the female positive terminal 87 contact each other. Can be surely prevented.

FIG. 5 shows another embodiment, in which the first male connector 71 and the second male connector 72 have a conical male peripheral wall 99 that is tapered toward the male bottom wall 75, and the outer peripheral surface of the male peripheral wall 99. The first female connector 73 and the second female connector 74 have a conical 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. A surface 83 is provided.
The female bottom wall 80 of the first female connector 73 and the second female connector 74 is provided with an insertion hole 101 corresponding to the female positive terminal 87 and the female negative terminal 88, and the female positive terminal 87 and the female negative terminal 88 are provided. The terminal 88 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 positive terminal 85 of the first male connector 71 and the male negative terminal 86 of the second male connector 72 are removably fitted between the holding pieces 102 of the female positive terminal 87 or the female negative terminal 88, respectively. It is formed in a bar shape.

  Thus, the first male connector 71 and the first female connector 73 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 positive terminal 85 and the female positive terminal are connected. 87 and the second male connector 72 and the second female connector 74 are detachably fitted to each other so that the male negative terminal 86 and the female negative terminal 88 are connected. Yes. Other points are the same as those in the above embodiment.

  In this embodiment, the holding piece of the female positive terminal 87 is interlocked with the connecting operation between the first male connector 71 and the first female connector 73 and the connecting operation between the second male connector 72 and the second female connector 74. The male positive terminal 85 can be elastically clamped by 102, the male negative terminal 86 can be elastically clamped by the clamping piece 102 of the female negative terminal 88, and the male positive terminal 85 and the female positive terminal 87 are connected. The male minus terminal 86 and the female minus terminal 88 can be reliably connected. 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.

  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 embodiment of FIG. 5, 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, but instead of this, the male positive terminal 85 and The male negative terminal 86 is provided with a pair of holding pieces 102 that can be expanded by elastic deformation, and the female positive terminal 87 and the female negative terminal 88 are formed in a rod shape that can be removably inserted between the holding pieces 102. You may make it do.

  Further, in the embodiment of FIG. 1, 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 provided. It is also possible to provide a minus terminal urging means for urging toward the male minus terminal 86.

  Further, the first male connector 71 and the second male connector 72 have only one of the upper and lower male side walls 76 and the left and right male side walls 77 that are tapered toward the male bottom wall 75 as male side walls. The first female connector 73 and the second female connector 74 may have only one of the upper and lower female side walls 81 or the left and right female side walls 82 tapered toward the female bottom wall 80 as female side walls.

DESCRIPTION OF SYMBOLS 1 Working machine 2 Tractor vehicle body 3 Three-point link mechanism 31 Connecting frame 43 Electrical equipment 67 Connecting frame side harness 68 Working machine side harness 71 First male connector 72 Second male connector 73 First female connector 74 Second female connector 75 Male bottom Wall 78 Male guide surface 80 Female bottom wall 83 Female guide surface 85 Male positive terminal 86 Male negative terminal 87 Female positive terminal 88 Female negative terminal 99 Male peripheral wall 100 Female peripheral wall 102 Holding piece

Claims (1)

A female connector (73 ) provided on a connection frame side harness (67) connected to a power source of the tractor vehicle body (2) to a connection frame (31) connected to the tractor vehicle body (2) via a link mechanism (3).
, 74) and provided on the work machine side harness (68) connected to the electric device (43) mounted on the work machine (1) connected to the connection frame and the female connectors (73, 74). ) And male connectors (71, 72) facing each other ,
Power of the connecting frame (31) and work machine (1) and work machine connecting device for fitting the conjunction when serving reached a coupling position the male connector and (71, 72) and the female connector (73, 74) A harness connecting structure,
The male connector (71, 72) and the female connector (73, 74) are provided in pairs, and each male connector (71, 72) and each female connector (73, 74) are provided with connection terminals. Provided,
The female terminals (87, 88 ) of the female connectors (73, 74) are formed of clamping pieces (102) that can be expanded by elastic deformation, and the male terminals (85, 86) of the male connectors (71, 72) are formed previously bellflower Jihen (102) rod-fitted into removably between,
On the outer surface of each male connector (71, 72), a male guide surface (78) having a conical shape extending rearward is formed,
On the inner surface of each female connector (73), there is provided a female guide surface (83) that is formed in a conical shape that extends rearward and into which the male guide surface (78) is inserted and fitted. 83) the female terminal (87, 88) is provided in the insertion hole (101) formed in the female bottom wall (80) located on the back side of
The female terminal (87) provided on one female connector (73) is a female positive terminal (87), and the female terminal (88) provided on the other female connector (74) is a female negative terminal. The female guide surface (83) on the female positive terminal (87) side and the female guide surface (83) on the female negative terminal (88) side are arranged independently of each other. A power harness connecting structure for a working machine connecting device.

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