JPS63230001A - Hitch apparatus of tractor and working machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a coupling device for a tractor and a working machine.

(Prior art) A rotary tiller is connected to the rear of a tractor in a movable and detachable manner via a three-point linkage mechanism consisting of a top link in the center and a pair of lower links on the left and right sides, and
When the PTO shaft of the tractor and the input shaft of the tilling device are releasably connected via a telescopic transmission shaft and universal joints provided at both ends of the transmission shaft, the reconnection work described above can be easily performed. The technology to do this was published in Japanese Patent Application Laid-Open No. 58-216.
It is disclosed in Japanese Patent No. 605.

In the above, the tilling device side ends of the top link and both lower links are connected by a connecting body, and the connecting body is such that when the tractor moves backward, the upper part of the left and right center part of the tilling device and the right and left sides are engaged and disengaged. The coupling body is provided with a clutch device that has an engaging portion that can be freely engaged and that releasably connects the tilling device side universal joint and the input shaft.

The clutch device includes a pair of left and right guide rails disposed in the front-rear direction on the coupling body, an equipment tube that is movably provided on the guide rails in the front-rear direction and supports a universal joint on the tilling device side, and an equipment tube. It has an operating device that operates in the axial direction.

When the tractor and the tilling device are connected, after the tilling device is engaged with the engaging portion of the coupling body, the operating device moves the equipment cylinder toward the tilling device, thereby connecting the tilling device side universal joint and the input shaft. to connect.

(Problems to be Solved by the Invention) In the above-mentioned conventional clutch device, the clutch device is not equipped with a means for absorbing misalignment in the vertical direction between the universal joint on the tilling device side and the input shaft. The connection between the universal joint and the input shaft has been difficult.

(Means for solving the problem) In order to solve the above problem, the central tonneau printer 10
A working machine R is removably connected to the tractor 1 via a three-point linkage mechanism 9 consisting of a pair of left and right lower links 11, and both lower links 11 can be raised and lowered by a lifting device 3,
The tractor l0 PTO shaft 7 and the input shaft 25 of the working machine R are
A telescopic transmission shaft 40 is releasably connected via a pair of universal joints 41 and 42 provided at both ends of the transmission shaft 40, in which a top link 10 and both lower links 1 are connected.
1 are connected to each other by a connecting body 14,
The connecting body 14 has engaging portions 21 and 22 that are removably engaged with the upper part of the center portion in the left and right direction of the working machine R and both left and right sides when the connecting body 14 is raised. A blocking device 85 for releasably preventing separation from the portions 21 and 22, and a clutch device 24 are provided. an equipment cylinder 27 having an axis center and slidably provided in the guide 26 in a substantially front-back direction via a sliding member 30; a working machine side universal joint 42 supported within the equipment cylinder 27; It has an operating device 28 that moves the equipment cylinder 27 in the axial direction and can freely change the position between a tractor-side holding position and a working machine-side holding position, and the sliding member 30 moves the equipment cylinder 27 in the longitudinal direction.
The sliding member 30 is located closer to the tractor 1 than the connecting body 14 , and has an elastic member 39 that allows the equipment cylinder 27 to be vertically movable and swingably held relative to the guide 26 . After the work implement R engages with the engaging portions 21 and 22, the operating device 28 causes the equipment cylinder 27 to change its position from the tractor side holding position to the work implement side holding position, thereby moving the work implement side universal joint 42. It is at the point where it is releasably connected to the input shaft 25.

(Function) When the work implement R is connected to the tractor 1, the work implement R engages with the upper and lower engaging portions 21 and 222 of the connective body 14 as the connecting body 14 is raised by the lifting device 3, and is blocked. The device 85 prevents the coupling body 14 from disengaging from the upper and lower engagement parts 21,22.

Next, in the clutch device 24, the operating device 28 changes the position of the equipment tube 27 from the tractor side holding position to the work machine side holding position, so that the connecting shaft 46 interlocking with the PTO shaft 7 is connected to the input shaft of the work machine R. It is connected to the shaft 25.

At this time, misalignment between the connecting shaft 46 and the input shaft 25 in the vertical direction is absorbed by elastic deformation of the elastic member 39 of the sliding member 30.

(Embodiment) Hereinafter, a first embodiment of the present invention will be described based on the drawings of FIGS. 1 to 6. In FIG. 3, 1 is a tractor, 2 is
Reference numeral 3 denotes a hydraulic device for lifting and lowering a working machine, which is exemplified as a lifting device mounted on the rear of the tractor body 2, and has a pair of left and right lift arms 4. 5 is a seat, 6 is a rear wheel, and 7 is a PTO shaft, which protrudes rearward from the rear end of the vehicle body 2.

R is a side drive type rotary tilling device exemplified as a working machine, which is connected to the rear of the tractor 1 via a three-point link mechanism 9 so as to be movable up and down and detachable.

The three-point link mechanism 9 consists of a top link 10 in the center and a pair of left and right lower links 11.
and each lift arm 4 are connected by a lift iron 12, respectively.

As shown in FIGS. 1, 2, and 4, 14 is a connecting body that connects the working machine side ends, that is, the rear ends of the top link 10 and both lower links 11, A cylindrical vehicle body 15 having a front view gate shape projecting upward, and a vehicle body 15
A crossing material 1 installed between the vertical midway point on both left and right sides of
6, a pair of left and right upper plates 17 protruding upward from the upper end of the left-right central portion of the main body 15, and a pair of left and right lower plates protruding rearward from the lower ends of both left and right sides of the vehicle body 15. 1
8, and a pair of left and right connecting pins 19 inserted into the lower end portions of the left and right sides of the vehicle body 15 and the lower plate 18 in the left and right direction.

A ball joint portion at the rear end of the top link 10 is removably connected between the front portions of the left and right upper plates 17 by a mounting pin 20. A notch is formed in the rear part of the rain upper side plate 17 to form an upper engaging part 21 that opens diagonally upward and rearward.

Each lower plate 18 is provided with a cutout portion 22 that opens obliquely downward toward the rear.

A rear end portion of each lower link 11 is detachably provided on the inner side of each connecting pin 19.

Reference numeral 24 denotes a clutch device that releasably connects the PTO shaft 7 of the tractor 1 and the input shaft 25 of the tilling device R, and is located below the center portion in the left-right direction of the coupling body 14, as shown in FIG. And as shown in FIG. 6, a pair of left and right guides 16
, an equipment tube 27 , and an operating device 28 for the equipment tube 27 .

Both guides 26 are disposed substantially in the front-rear direction below the center portion of the crossing material 16 in the left-right direction, and are attached to the lower surface of the crossing material 16 via a bracket 29. The cross-sectional shape of each guide 26 is bi-shaped with an opening inward.
6 has a top wall, a bottom wall, and a side wall.

The equipment tube 27 has an axis extending approximately in the front-rear direction, and both guides 26
It is disposed between the two guides 26 and is slidably provided on both guides 26 via a sliding member 30 in the axial direction. Equipment tube 2
A pair of left and right support members 31 protrude forward from the lower portions of both left and right sides of the support member 7 . Further, an upright plate 32 is erected from the center in the left and right direction of the upper rear surface of the equipment tube 27, and a positioning pin 33 is provided rearwardly to protrude from the upright plate 32.
The rear end is shaped like a truncated cone.

Inside each guide 26, there are a plurality of sliding members 30 in the front and back direction.
In the embodiment, a pair of front and rear members are provided, and the sliding member 30 is spaced further forward than the equipment tube 27, that is, toward the tractor I side in the front-rear direction.

Each sliding member 30 includes a swing arm 35 that is swingably supported by a support shaft 34 in the left and right direction of the support member 31, and
A lower roller 36, which is illustrated as a lower tank moving part, is pivoted to the upper end of the swinging arm 35 and moves on the bottom wall of the guide 26, and Upper roller 3 exemplified as an upper tank moving part for transferring superiors
8.

Due to the swinging of each sliding member 30 around the support shaft 34, the equipment tube 2
7 is configured to be able to move upward in parallel and swing freely in the vertical direction.

By the way, within each guide 26, the front sliding member 30
is tilted forward, the rear sliding member 3o is tilted backward, and an elastic member 39, exemplified by a coil spring, is elastically disposed between the swinging arms 35 of both the front and rear tank moving members 30. By being interposed, each sliding member 30 becomes independent, and the upper and lower rollers 38 and 36 of each sliding member 30 contact the top wall and bottom wall of the guide 26, respectively. This allows the equipment cylinder 27 to maintain a predetermined attitude with respect to the guide 26.

By the way, the PTO shaft 7 of the tractor 1 and the input shaft 25 of the tilling device R are releasable via a power transmission shaft 40 and front and rear universal joints 41 and 42 provided at both ends of the power transmission shaft 40. is linked to.

The transmission shaft 40 is made up of a shaft body 43 constituting its front side and a cylindrical body 44 constituting its rear side and slidably splined to the shaft body 43, and is expandable and retractable.

The rear universal joint 42 consists of front and rear yokes 45, 46, and a spider 47 that connects both yokes 45, 46, and the front yoke 45 is releasably connected to the cylindrical body 44 of the transmission shaft 40.

The rear yoke 46 is a connecting shaft that is releasably connected to the input shaft 25, and the rear part of the rear yoke 46 is connected to the equipment tube 27.
is supported via a bearing 48. A female spline portion 50 is formed on the rear inner surface of the rear yoke 46 and is removably spline-fitted to the male spline portion 49 of the input shaft 25 . Note that a tapered surface 51 tapered toward the front is formed on the inner surface of the rear end portion of the rear yoke 46.

The second operating device for the equipment tube 27 moves the equipment tube 27 in the axial direction so that it can be freely changed and held in several holding positions, and includes a support shaft 52, a pair of left and right interlocking levers 53, It includes a pair of left and right interlocking links 54, an operating lever 55, a lock plate 56, a lock pin 57, a bullet 58, and the like.

The support shaft 52 is disposed in the left-right direction in front of the crossing material 16,
It is rotatably provided on the crossing member 16 via a pair of left and right projecting plates 59.

The left and right re-interlocking levers 53 are fixed to the left and right sides of the support shaft 52 and serve as servants, and are located on both sides of the upper part of the left and right sides of the equipment cylinder 27 when viewed from the front.

The re-interlocking link 54 extends longitudinally inside the upper part of both guides 26, and has a front end pivotally connected to the interlocking lever 53, and a rear end connected to the upper part of the left and right sides of the equipment cylinder 27. It is pivotally connected to.

A concave cover 60 is fixed to the rear of the re-interlocking link 54, and the cover 60 protects the portion of the rear universal joint 42 that protrudes forward from the equipment tube 27 and the input shaft 2 of the tilling device R.
The exposed parts of 5 are covered.

The operating lever 55 is L-shaped, and is fixed to the right side of the support shaft 52 and stands upright.

The lock plate 56 is erected from the right side projecting plate 59, and has a lock part 61 in an upwardly curved shape at its upper end. Several lock holes 62 are formed in the lock part 61 at equal intervals in the circumferential direction. is formed.

The lock pin 57 is L-shaped and extends along the right side of the t1 operating lever 55, and is inserted into a U-shaped guide member 63 fixed to the operating lever 55 so as to be movable in the axial direction. The lock pin 57 is provided with a U-shaped guide piece 64 that holds the operating lever 55 and prevents the lock pin 57 from rotating.
is fixed.

The lock pin 57 is inserted into and removed from a desired lock hole 62, and a spring holder piece 65 is fitted onto the guide member 63, and the spring holder moves downward from the spring holder piece 65. is blocked by bin 66.

In the ammunition device 58, the top wall portion of the guide member 63 and the spring receiver of the lock pin 57 are wound around the pieces 65 in a resilient manner, thereby urging the lock pin 57 toward the lock portion 61 side.

The tilling device R includes an input case 68 located at the center of the upper front part in the left-right direction, and a top mast 69 that projects obliquely forward and upward from the input case 68 and consists of a pair of left and right side plates.
, a pair of support arms 7o protruding from the input case 68 in the left and right sides, and a pair of left and right brackets 7 protruding forward from the middle part of each support arm 70 in the left and right direction.
1, a pair of left and right front gauge wheels 72, and a top mast 69
A pair of left and right support links 73 connecting the upper end of each side plate and each bracket 71, a transmission case 74 and a side plate lowered from the outer end of each support arm 70, and a lower end of the transmission case 74 and side plate. A tilling section 75 which is horizontally suspended between sections and is rotationally driven, and which is composed of a tilling shaft and a large number of tilling claws provided on the tilling shaft;
It has a tillage cover 76 etc. that covers the tillage cover 76 and the like.

The input case 68 supports the input shaft 25 that projects forward, and a pin receiver body 77 into which the positioning pin 33 is inserted and engaged is fixed to the front surface of the input case 68 so as to project forward. By the above engagement, the axes of the rear yoke 46 of the rear universal joint 42 and the input shaft 25 are made to correspond to each other. The pin receiver has a tapered hole 78 formed in the front part of the body 77, and is opened outward at the rear part, and is provided with a stopper 84.

An upper connecting shaft 79 is provided between the front ends of both side plates of the top mast 69, and the upper engaging portion 2 of the connecting body 14 is connected to this upper connecting shaft 79.
1 is removably engaged from the lower side.

Each lower connecting shaft 80 is inserted into the front end of each bracket 71 in the left-right direction, and the inner side of each lower connecting shaft 80 is removably engaged with each lower engaging portion 22 from the rear.

A holding tube 82 is vertically installed on the front outer surface of each bracket 71 via a circular mounting portion 81, and a stay 83 of the front gauge tube 72 is inserted through the holding tube 82 so as to be movable and adjustable in the vertical direction.

Reference numeral 85 denotes a pair of left and right blocking devices, which are provided at the lower portions of both left and right sides of the connecting body 14, and are installed at the lower portions of both left and right sides of the connecting body 14, and are connected to each lower engaging portion 22 of each lower connecting shaft 80.
It releasably prevents separation from the inside, and includes a lock plate 86, an operating pin 87, a bullet 88, and the like.

The lock plate 86 is swingably supported on the outer side of each connecting pin 19, and is removably engaged with each lower connecting shaft 80 from below. A cam surface 89 is formed at the rear end of the lock plate 86 and has an upwardly inclined cam surface 89 .

The operating pin 87 is vertically movably inserted into a U-shaped guide member 90 that is fixed to the lower part of the left and right sides of the main body 15 of the connecting body 14, and is connected to a bifurcated connecting piece fixed to the lower part of the U-shaped guide member 90. 91
is loosely fitted to the front end of the lock plate 86 and connected by a pin 92. Note that since the connecting piece 91 is loosely fitted to the lock plate 86, the operating pin 87 can be rotated slightly around the axis.

A U-shaped hook piece 93 is fixed to the upper end of the operating bin 87, and the lower part of the hook piece 93 is removably engaged with the upper end surface of a receiving plate 94 provided upright on the guide member 90. By doing so,
The lock plate 86 is held at the unlocked position, which is a position rotated downward from the position shown in FIGS. Permissible.

A spring receiver piece 95 is fitted onto a portion of the operating bin 87 within the guide plate 90, and a pin 96 prevents the spring receiver piece 95 from moving downward.

In the ammunition device 88, the top wall portion of the guide member 90 and the spring receiver of the operating pin 87 are wound around the spring rest between the pieces 95.

According to the embodiment configured as described above, when connecting the tilling equipment fiR to the tractor 1, the clutch device 24 moves the equipment tube 27 to the frontmost side, for example, as shown in FIG. It is held in the moved tractor side holding position (In this state, the equipment tube 27 is
It is located at a position corresponding to the rear part of the guide 26.

Further, in each blocking device 85, the pin 96 is placed in contact with the bottom wall portion of the guide member 90, so that the lock plate 86 is allowed to swing.

On the other hand, the tilling device R is placed on the ground and is slightly tilted forward as shown in FIG.

In this state, the tractor 1 is moved backward to approach the tiller R, and as shown in FIG.・
The lower engaging portions 21, 22 are located respectively.

Next, the three-point link mechanism 9, the connecting body 14, and the clutch device 24 are gradually raised by the hydraulic device 3, and the upper connecting shaft 79 is first engaged in the upper engaging portion 21 of the connecting body 14. , in this state, each lower engaging portion 22 is connected to each lower connecting shaft 8
It is located in front of 0.

Then, if the three-point linkage mechanism 9, the connecting body 14, and the clutch device 24 are further raised, the upper connecting shaft 79 is engaged in the upper engaging portion 21 of the connecting body 14. As the point linkage mechanism 9 and the like rise, the tilling device R is lifted and rotated around the upper connecting shaft 79 toward the tractor 1, that is, toward the front.

As a result, each lower connecting shaft 80 engages into each lower engaging portion 22 from the rear and comes into contact with the cam surface 89 of the lock plate 86.

As a result, the ammunition 88 is compressed, the lock plate 86 rotates downward, and the lower connecting shaft 80 is engaged deep inside the lower engagement part 22, and then the lock plate 86 The lower connecting shaft 80 swings upward due to the elastic force of
, and prevents the lower connecting shaft 80 from disengaging from the lower engaging portion 22 .

By the way, in a state where the upper and lower connecting shafts 79 and 80 of the tilling device R are engaged with the upper and lower engaging portions 2L22 of the connecting body 14, the rear yoke 46 of the rear universal joint 42 and the input shaft 2 of the tilling device R are engaged.
5 are opposed in the front and rear.

Therefore, when connecting the rear yoke 46 to the input shaft 25 from the above state, the driver on the seat 5 reaches back and holds the operating lever 55 of the clutch device 24, and also holds the lock pin 57. is moved and held upward, removed from the lock hole 62 of the lock plate 56, and then rotated forward.

As a result, the support shaft 52 and the interlocking lever 53 rotate, and the interlocking link 54 moves rearward.
While extending the transmission shaft 40, it moves rearward together with the rear universal joint 42, and as shown in FIGS. It is fitted into the male spline portion 49 of the input shaft 25 .

After the above-mentioned fitting, the holding of the lock pin 57 is released, the lock pin 57 is inserted into the lock hole 62 of the lock plate 56, and the equipment cylinder 27 is moved, for example, to the rearmost position on the cultivating device side. Hold.

By the way, in the above case, when the equipment tube 27 moves backward, the upper and lower rollers 3B and 3 of each sliding member 30
6 rolls on the top and bottom walls of the guide 26.

At this time, the equipment tube 27 that supports the rear yoke 46 of the rear universal joint 42 can be moved parallel to one side and swing freely in the vertical direction by the swinging of the sliding member 30 around the support shaft 34. For example, even if the rear eyepiece 46 is misaligned downward with respect to the input shaft 25, the positioning pin 33 is inserted into the tapered hole 78 of the body 77, and the input shaft 25 is By being guided by the tapered surface 51 of the yoke 46, the sliding member 30 swings around the support shaft 34, and the misalignment of the rear yoke 46 with respect to the input shaft 25 is corrected. can be easily and smoothly connected to the input shaft 25.

As mentioned above, since the rear yoke 46 cannot be moved downward parallel to the input shaft 25, the normal position of the rear yoke 46 before the connection between the rear yoke 46 and the input shaft 25 is It is preferable to position it slightly below the input shaft 25.

Note that the positioning pin 33 is connected to the stopper 84 of the body 77.
By abutting against them, excessive fitting between the female spline portion 50 of the rear yoke 46 and the male spline portion 49 of the input shaft 25 is prevented.

Further, since the pin receiver has an opening outward on the rear side of the body 77, the degree of fitting of the male and female spline parts 49 and 50 can be easily checked from the outside.

As described above, the connection work of the tilling device R to the tractor 1 is completed.

Next, when separating the tilling device R from the tractor 1,
The work is performed in the reverse order to the above. First, in the clutch device 24, hold the operating lever 55, move and hold the lock pin 57 upward, pull it out from the lock hole 62 of the lock plate 56, and then remove the operating lever 55. move backwards,
The equipment tube 27 is moved forward via the interlocking lever 53 and the interlocking link 54, the connection between the rear yoke 46 of the rear universal joint 42 and the input shaft 25 is released, and then the holding of the lock pin 57 is released. , the lock pin 57 is inserted into the lock hole 62 of the lock plate 56 by the bullet 58, and the equipment tube 27 is held.

Next, in each blocking device 85, the operation pin 87 is
8 to bring the lock plate 86 to the unlocked position, rotate the operating pin 87 to engage and hold the hook piece 93 with the upper end surface of the receiving plate 94, and set the lock plate 86 to the unlocked position. , the lower connecting shaft 80 of the tilling device R can be detached from the upper engaging portion 22 of the connecting body 14.

In this state, the tilling device R is lowered by the hydraulic device 3 via the three-point link mechanism 9 and the connecting body 14, and the tilling portion 75 of the tilling device R is brought into contact with the ground.

Then, when the three-point linkage mechanism 9 and the connecting body 14 are further lowered, the tilling device R is tilted forward, and the lower connecting shaft 80 of the tilling device R is first exposed from inside the upper engagement portion 22 of the connecting body 14. leave,
Thereafter, from within the first engaging part 21 of the connecting body 14, the tilling device R is removed.
The upper connecting shaft 79 is relatively detached upward.

Thereby, the separation work of the tilling device R from the tractor 1 is completed.

FIG. 7 shows a second embodiment of the present invention, in which a supporting member 31
are fixedly installed at the vertical center of the left and right sides of the equipment tube 27. The vertical central portion of the swinging arm 35 of each sliding member 30 is pivotally supported by the supporting member 31 by a supporting shaft 67 in the left-right direction, so that the swinging of each sliding member 30 around the supporting shaft 67 causes , the equipment cylinder 27 can be moved in parallel in either the up or down direction and can be swung freely.

FIG. 8 shows a third embodiment of the present invention, in which the sliding member 3
0 is an elastic member 39 exemplified by a curved temporary spring.
The elastic member 39 has a cylindrical body 98 in the left and right direction fixed to the center in the circumferential direction, and the upper and lower ends of the elastic member 39 are elastically attached to the top wall and the bottom wall of the guide 26, respectively. The support shaft 34 is inserted into the cylindrical body 98 .

In the embodiment, a rotary tiller is used as the working machine, but a working machine other than the rotary tilling machine may be used.

Further, the present invention can also be applied to a device for connecting a working machine to the front side of a tractor.

(Effects of the Invention) As detailed above, according to the present invention, the tractor's PT
Even if there is misalignment in the vertical direction between the work equipment side universal joint that interlocks with the O-axis and the input shaft of the work equipment, the misalignment can be well absorbed, and the work equipment side universal joint and input shaft can be Can be easily connected. In addition, since the sliding member that supports the equipment tube is located closer to the tractor than the equipment tube in the longitudinal direction, it can receive the rear part of the transmission shaft, the universal joint on the work machine side, and the equipment tube in a well-balanced manner, and the equipment tube can For example, it does not lean too far toward the tractor, which makes it easier to connect the universal joint on the work machine side and the input shaft of the work machine, and also allows the guide to be moved far away from the work machine toward the tractor. This eliminates the risk of interference between the guide and the work machine. The present invention has the above advantages and is of great practical benefit.

[Brief explanation of drawings]

1 to 6 show a first embodiment of the present invention, each of FIGS. 1 and 2 is a partial cross-sectional side view of the main part showing different operating states, and FIG. 3 is an overall side view. , FIG. 4 is a partially sectional front view of the main part, FIG. 5 is a sectional view taken along the line A-A in FIG. 4, and FIG.
The figure is a sectional view taken along the line B--B in FIG. 5, and each of FIGS. 7 and 8 is a longitudinal sectional view of a main part showing the second and third embodiments of the present invention. 1-)-Hydraulic device for lifting and lowering work equipment, 3... Hydraulic device for lifting and lowering work equipment, 7-
PTO axis, 9 - 3-point link mechanism, 10 - top link, 11 - lower link, 14 - connection body, 21
．． 22-・Upper 1 engagement part, 4-・Clutch device, 25-
Human power shaft, 26-guide, 27-equipment tube, 28-operating device, 30--sliding member, 39--elastic member, 40-
-・Transmission shaft, 41.42-・Universal joint, 79.80・-
Upper/lower connecting shaft, 85-.Blocking device, R-.. Rokuri tilling device (work machine).

Claims (1)

[Claims] (1) The work implement R is removably connected to the tractor 1 via a three-point linkage mechanism 9 consisting of a top link 10 in the center and a pair of lower links 11 on the left and right, and both lower links 11
can be raised and lowered by the lifting device 3, and the PTO of the tractor 1
The shaft 7 and the input shaft 25 of the working machine R are connected to a telescopic transmission shaft 4.
0 and which are releasably connected via a pair of universal joints 41 and 42 provided at both ends of the transmission shaft 40, the top link 10 and both lower links 11 are connected at their respective ends on the work machine side. The connecting body 14 is connected by a body 14, and the connecting body 14 has engaging portions 21 and 22 that are removably engaged with the upper part of the center portion in the left and right direction of the working machine R and both left and right sides when the connecting body 14 is raised; A blocking device 85 that releasably prevents the working machine R from disengaging from the engaging portions 21 and 22 and a clutch device 24 are provided, and the clutch device 24 includes a guide disposed on the connecting body 14 in a substantially front-back direction. 26, an equipment cylinder 27 having an axis in the approximately longitudinal direction and provided on the guide 26 so as to be slidable approximately in the longitudinal direction via a sliding member 30, and a working machine supported within the equipment cylinder 27. It has a side universal joint 42 and an operating device 28 that moves the equipment tube 27 in the axial direction to change the position between a tractor side holding position and a working machine side holding position, and the sliding member 3
0 means that the tractor 1 is closer than the equipment cylinder 27 in the longitudinal direction.
The sliding member 30 has an elastic member 39 that allows the equipment cylinder 27 to be vertically movable and swingably held with respect to the guide 26, and the sliding member 30 has an elastic member 39 that allows the equipment cylinder 27 to be held vertically and swingably relative to the guide 26.
, 22, after the work implement R engages with the operating device 28,
A connection between a tractor and a working machine, characterized in that the working machine side universal joint 42 is releasably connected to the input shaft 25 by changing the position of the equipment tube 27 from the tractor side holding position to the working machine side holding position. Device.