JPH0616644B2 - Coupling device for tractor and work equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coupling device for a tractor and a working machine.

(Prior Art) Through a three-point link mechanism consisting of a central top link and a pair of left and right lower links, a rotary tiller is connected to the rear of the tractor so as to be movable up and down and detachably,
In the case where the PTO shaft of the tractor and the input shaft of the tiller are releasably connected via a telescopic transmission shaft and universal joints provided at both ends of the transmission shaft, both of the above connecting operations are facilitated. The technology that enables this is disclosed in JP-A-58-21660.
No. 5 is disclosed.

In the above-mentioned structure, the end portions of the toplink and the lower links on the side of the tilling device are connected by the connecting body. The clutch device is provided with an engaging portion that is freely engaged, and the connecting body is provided with a clutch device that releasably connects the tiller-apparatus-side universal joint and the input shaft.

The clutch device includes a pair of left and right guide rails arranged in the front-rear direction in the connecting body, an equipment cylinder movably provided in the guide rails in the front-rear direction, and supporting the tiller side universal joint, and an equipment cylinder. And an operating device that operates in the axial direction.

Then, at the time of connecting the tractor and the cultivating device, after engaging the cultivating device with the engaging portion of the connecting body, by operating the operating device to move the equipment cylinder to the cultivating device side, input with the cultivating device side universal joint Connect with the shaft.

(Problems to be Solved by the Invention) By the way, in the above-mentioned conventional device, the clutch device is not provided with means for absorbing a vertical misalignment between the tiller side universal joint and the input shaft, and the tiller device is provided. It was difficult to connect the side universal joint and the input shaft.

(Means for Solving Problems) According to the present invention, a tractor 1 is provided with a connecting body 14 for connecting an end portion on the working machine side of a three-point link mechanism 9 which is vertically movable. The upper part of the section and the lower parts of both left and right sides are separably connected to the working machine R.
PTO shaft 7 of tractor 1 after 14 is connected to work implement R
And a clutch device 24 for connecting the input shaft 25 of the working machine R in a separable and interlocking manner, the following technical measures are taken to solve the above-mentioned problems.

That is, in the present invention, the clutch device 24 includes the connecting body 14
A guide 26 that is disposed substantially in the front-rear direction and has a top wall portion and a bottom wall portion, and has a shaft center in the substantially front-back direction and is slidable in the guide shaft 26 in the axial direction via a sliding member 30. The equipment cylinder 27 provided in the equipment cylinder 27, the connecting shaft 46 that is supported in the equipment cylinder 27 and interlocks with the PTO shaft 7, and the operating device 28 of the equipment cylinder 27.
A plurality of the sliding members 30 are arranged in the guide 26 in the substantially front-back direction, and each sliding member 30 has upper and lower sliding portions 38 and 36 that slide on the top wall portion and the bottom wall portion of the guide 26, respectively. , Each sliding member 30 is pivotally supported by the sliding portion 36 on the same side of the upper and lower sides so as to be swingable around the support shaft 34 in the left-right direction, so that the mounting cylinder 27 moves upward or downward. It can be moved in parallel and can be swung in the vertical direction, and each sliding member 30 is biased so that the upper and lower sliding parts 38, 36 respectively contact the top wall part and the bottom wall part of the guide 26. There is an ammunition 39 for hitting, and the equipment cylinder 27 moves in the axial direction, so that the connecting shaft 46 inside the connecting cylinder 46 is interlocked and connected, and the connecting shaft 46.
Is movable to a separation position where it is separated from the input shaft 25, and the operating device 28 is capable of changing and holding the equipment cylinder 27 between the connection position and the separation position.

(Operation) When connecting the work machine (R) to the tractor (1), first
(14) is connected to the work machine (R).

Next, in the clutch device (24), the operating device (28) changes the position of the equipment cylinder (27) from the separating position to the connecting position, so that the connecting shaft (4) interlocked with the PTO shaft (7).
6) is connected to the input shaft (25) of the work machine (R).

At this time, the vertical misalignment between the connecting shaft (46) and the input shaft (25) is absorbed by the swinging of the sliding member (30) around the support shaft (34).

(Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings of FIGS. 1 to 6. In FIG. 3, (1) is a tractor,
(2) is a tractor vehicle body, (3) is a working machine lifting hydraulic device exemplified as a lifting device mounted on the rear part of the tractor vehicle 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 projects rearward from the rear end of the vehicle body (2).

(R) is a side-drive type rotary tiller, which is an example of a working machine, and has a three-point linkage (9) behind the tractor (1).
It can be moved up and down and is detachably connected via.

The three-point link mechanism (9) consists of a central top link (10) and a pair of left and right lower links (11).
1) and each lift arm (4) are connected by a lift rod (12).

As shown in FIG. 1, FIG. 2 and FIG. 4, (14) is a connecting body, which is the working machine side end of the top link (10) and both lower links (11), that is, the rear end. And a cylindrical main body (15) having a front view gate shape protruding upward, and a main body (15).
Of the material (1
6), a pair of left and right upper plates (17) projecting upward from the upper end of the center of the body (15) in the left-right direction, and lower ends of both left and right sides of the body (15) projecting rearward. Left and right lower plate (18)
And a pair of left and right connecting pins (19), etc., which are laterally inserted into the lower end portions of the left and right side portions of the main body (15) and the lower side plate (18).

A ball joint portion at the rear end of the top link (10) is detachably connected by a mounting pin (20) between the front portions of the left and right upper side plates (17). An upper engaging portion (21) is formed in the rear portion of both upper side plates (17) so as to open obliquely upward and rearward.

Each lower side plate (18) is provided with a lower engaging portion (22) that is open rearward and obliquely downward.

A rear end of each lower link (11) is detachably attached to the inside of each connecting pin (19).

(24) is a clutch device for releasably connecting the PTO shaft (7) of the tractor (1) and the input shaft (25) of the tiller (R), and the left and right direction of the connecting body (14). As shown in FIGS. 5 and 6, which is located on the lower side of the central portion, a pair of left and right guides (26), an equipment cylinder (27), an operation device (28) for the equipment cylinder (27), and the like. Have.

Both guides (26) are arranged substantially in the front-rear direction below the center of the installation material (16) in the left-right direction, and are attached to the lower surface of the installation material (16) via a bracket (29). . The cross-sectional shape of each guide (26) is a U-shape that opens inward, and each guide (2
6) has a top wall portion, a bottom wall portion, and a side wall portion.

The equipment cylinder (27) has an axial center in the front-rear direction, is arranged between both guides (26), and is slidable in both guides (26) in the axial direction via a sliding member (30). Is equipped with. Equipment tube (27)
A pair of left and right support members (31) are provided so as to project forward from the lower portions of both left and right sides of the. Further, a standing plate (32) is erected from the center portion in the left-right direction on the upper rear surface of the equipment cylinder (27), and a positioning pin (33) is projected rearward from the standing plate (32), The rear end of the pin (33) has a truncated cone shape.

Within each guide (26), there are multiple sliding members (30) in the front-rear direction,
In the embodiment, a pair of front and rear are provided, and the sliding member (30)
Is in front of the equipment cylinder (27) in the front-back direction, that is,
Separated on the tractor (1) side.

Each sliding member (30) includes a swing arm (35) pivotally supported on a support member (31) by a horizontal support shaft (34), and a support shaft (34).
A lower roller (36) exemplified as a lower sliding portion that is pivotally supported on the bottom wall of the guide (26) and a horizontal support shaft (37) on the upper end of the swing arm (35). An upper roller (3) exemplified as an upper sliding portion that is pivotally supported and rolls on the top wall portion of the guide (26).
8) and

By the way, in each guide (26), the front sliding member (30)
Is tilted forward, and the rear sliding member (30) is tilted backward, and the ammunition (3) is placed between the swinging arms (35) of the front and rear sliding members (30).
The sliding member (30) is urged in the upright direction by interposing 9) in the form of an elastic pull, and the upper and lower rollers (38) (36) of each sliding member (30) are guided. The top wall portion and the bottom wall portion of (26) are respectively brought into contact with each other, whereby the equipment cylinder (27) is maintained in a predetermined posture with respect to the guide (26).

That is, when a relative upward force is applied to the support member 31 and the guide 26, the front sliding member 30 swings counterclockwise around the support shaft 34 in FIG. Sliding member 30
Oscillates around the support shaft 34 in the clockwise direction, whereby the upper rollers 38 move away from each other, and as a result, the equipment cylinder 27 is allowed to move upward and swing vertically. It will be possible.

On the other hand, since the front and rear sliding members 30 are elastically pulled by the elastic member 39, the upper and lower rollers 38, 36 are guided by the guide 26.
The equipment cylinder 27 is held in a predetermined posture with respect to the guide 26 by abutting on the top wall portion and the bottom wall portion.

By the way, the PTO shaft (7) of the tractor (1) and the tiller (R)
The input shaft (25) is releasably interlocked via the transmission shaft (40) and the front and rear universal joints (41) (42) provided at both ends of the transmission shaft (40). There is.

The transmission shaft (40) is composed of a shaft body (43) forming the front side thereof and a cylindrical body (44) forming the rear side thereof and slidably spline-coupled to the shaft body (43). It is supposed to be stretchable.

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

The rear yoke (46) is a connecting shaft releasably connected to the input shaft (25), and the rear portion of the rear yoke (46) is equipped with the equipment cylinder (27).
Supported by bearings (48). On the inner surface of the rear portion of the rear yoke (46), there is formed a female spline portion (50) which is spline-fitted with the male spline portion (49) of the input shaft (25). A taper surface (51) that is tapered forward is formed on the inner surface of the rear end portion of the rear yoke (46).

The operating device (28) of the equipment cylinder (27) moves the equipment cylinder (27) in the axial direction, and the rear yoke (46) inside the equipment cylinder (27) is connected to the input shaft (25) in a linked position. The rear yoke (46) can be freely changed and held in a separated position where it is separated from the input shaft (25) .The support shaft (52), a pair of left and right interlocking levers (53), and a pair of left and right interlocking links ( 54), operating lever (55), and lock plate (5
6), a lock pin (57), an ammunition (58) and the like.

The support shaft (52) is arranged in the left-right direction in front of the cross plate material (16),
The cross plate member (16) is rotatably provided via a pair of left and right projecting plates (59).

The left and right interlocking levers (53) are fixedly installed on the left and right side portions of the support shaft (52) and are provided under the support shaft (52).

Both interlocking links (54) are formed in the upper part of both guides (26) along the inner side in the longitudinal direction, the front end is pivotally connected to the interlocking lever (53), and the rear end is equipped with the equipment cylinder ( It is connected to the upper part of both left and right side of 27).

A gate-shaped cover (60) is fixedly provided at the rear of both the interlocking links (54), and the cover (60) allows the equipment cylinder of the rear universal joint (42) to be installed.
(27) The part protruding forward and the input shaft of the tiller (R)
The exposed part of (25) is covered.

The operation lever (55) is L-shaped, and is fixedly installed on the right side of the support shaft (52).

The lock plate (56) is erected from the right side projecting plate (59), and has a lock portion (61) that is curved upward in the upper end portion, and the lock portion (61) has several lock portions. The lock holes (62) are formed at equal intervals in the circumferential direction.

The lock pin (57) has an L-shape, and is arranged along the right side of the operation lever (55), and has a U-shaped guide member (63) fixed to the operation lever (55) in the axial direction. U-shaped guide piece (64) which is movably inserted into the lock pin (57) and prevents the lock pin (57) from rotating by holding the operation lever (55) in the lock pin (57).
Is stuck.

The lock pin (57) is insertably / removably inserted into a desired lock hole (62), and a spring receiving piece (65) is externally fitted to a portion of the guide member (63) of the locking pin (57). The downward movement of 65) is blocked by the pin (66).

The ammunition machine (58) is elastically wound around the top wall of the guide member (63) of the lock pin (57) and the spring receiving piece (65), and
(57) is biased toward the lock part (61).

The tiller (R) is a top mast (69) which is provided at a position diagonally upward and forward from an input case (68) located at the center of the front upper part in the left-right direction, and which includes a pair of left and right side plates, and an input case (6).
8) A pair of support arms (7
0), a pair of left and right brackets (71) projecting forward from the middle of the left and right direction of each support arm (70), a pair of left and right front gauge wheels (72), and upper ends of the side plates of the top mast (69). A pair of left and right support links (73) connecting the bracket and the brackets (71), a transmission case (74) and a side plate that are respectively installed from the outer end of each support arm (70), and a transmission case ( 74) and a cultivating part (75) horizontally driven between the lower ends of the side plates and composed of a cultivating shaft and a large number of cultivating claws provided on the cultivating shaft, and a cultivating part covering the cultivating part (75). It has a cover (76) and the like.

The input case (68) supports the input shaft (25) projecting forward, and the front surface of the input case (68) has a pin receiving body (77) into which a positioning pin (33) is inserted and engaged. Is fixed to the front protruding shape, and by the above engagement, the rear yoke of the rear universal joint (42)
The axes of (46) and the input shaft (25) are matched and matched. A taper hole (78) is formed in the front part of the pin receiving body (77), the rear part is opened outward, and a stopper (84) is provided.

An upper connecting shaft (79) is provided between the front end portions of both top plates of the top mast (69), and the upper engaging portion (2) of the connecting body (14) is attached to the upper connecting shaft (79).
1) is disengageably engaged from below.

The lower connecting shafts (80) are laterally inserted into the front ends of the brackets (71), respectively, and the inner parts of the lower connecting shafts (80) are engaged with and disengaged from the lower engaging parts (22) from the rear. Engage freely.

A holding cylinder (82) is vertically installed on the front outer surface of each bracket (71) through a circular mounting portion (81), and the front gauge wheel is attached to the holding cylinder (82).
The stay (83) of (72) is inserted so as to be vertically movable.

(85) is a pair of left and right blocking devices, which are provided at the lower portions of both left and right sides of the coupling body (14) so that the disengagement of each coupling shaft (80) from each lower engagement portion (22) can be released. It has a lock plate (86), an operation pin (87), an ammunition (88), and the like.

The lock plate (86) is pivotally supported on the outer side of each connecting pin (19) so as to be swingable, and engages with each lower connecting shaft (80) from below in a disengageable manner. At the rear end of the lock plate (86), a cam surface (89) is formed which is inclined forward and upward.

The operation pin (87) is vertically movably inserted in a U-shaped guide member (90) fixed to the lower part of the left and right sides of the main body (15) of the coupling body (14), and fixed to the lower part thereof. Bifurcated connecting piece installed (91)
Are loosely fitted to the front end of the lock plate (86) and are connected by the pin (92). The connecting piece (91) is the lock plate.
Since it is loosely fitted in the (86), the operation pin (87) can be slightly rotated about the shaft center.

A U-shaped hooking piece (93) is fixed to the upper end portion of the operation pin (87), and the lower part of the hooking piece (93) is a receiving plate (94) erected on the guide member (90). By being engageably and disengaged with the upper end surface,
The lock plate (86) is held in the lock releasing position, which is a position rotated downward from the position shown in FIGS. 1 and 2, and in this state, the lower engaging portion (80) of the lower connecting shaft (80) is Withdrawal from 22) is allowed.

The spring receiving piece (95) is fitted on the portion of the operation pin (87) inside the guide member (90), and the downward movement of the spring receiving piece (95) is blocked by the pin (96). There is.

The ammunition machine (88) is elastically wound between the top wall portion of the guide member (90) of the operation pin (87) and the spring receiving piece (95).

According to the embodiment configured as described above, when the tiller (R) is connected to the tractor (1), the clutch device (24), as shown in FIG. For example,
Sliding member with the position moved to the frontmost as the separation position
It is held on the guide 26 via the elastic member 39 and the elastic member 39.
In this state, the equipment cylinder 27
It is located at the rear of the 26.

Further, in each blocking device (85), the pin (96) is attached to the guide member (90).
The lock plate (86) is rockable.

On the other hand, the cultivating device (R) is placed on the ground and 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. 2, the upper and lower connecting shafts (79) (80) of the tiller (R) are connected to the front. The upper and lower engaging portions (21) and (22) of the connecting body (14) are respectively positioned on the diagonally lower side.

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 first,
The upper connecting shaft (79) is engaged in the upper engaging portion (21) of the connecting body (14), and in this state, each lower engaging portion (22) is located in front of each lower connecting shaft (80). Located on the side.

Then, by further raising the three-point link mechanism (9), the connecting body (14) and the clutch device (24), the upper connecting shaft (79) is inserted into the upper engaging portion (21) of the connecting body (14). ) Is engaged, the cultivating device (R) is lifted by the ascent of the three-point link mechanism (9) and the like, and the tractor (1) side around the upper connecting shaft (79), that is, the front side. It is turned to the side.

As a result, the lower connecting shafts (80) engage with the lower engaging portions (22) from the rear side and come into contact with the cam surface (89) of the lock plate (86).

As a result, the ammunition (88) is compressed, the lock plate (86) is rotated downward, and the lower connecting shaft (80) is moved to the lower engaging portion.
The lock plate (86) swings upward due to the resilience of the ammunition (88) to engage the bottom connecting shaft (80).
To prevent the lower connecting shaft (80) from being disengaged from the lower engaging portion (22).

By the way, when the upper / lower connecting shafts (79) (80) of the tiller (R) are engaged with the upper / lower engaging portions (21) (22) of the connecting body (14), the rear universal joint (42 ) Rear yoke (46) and the input shaft of the tiller (R)
(25) and the front and rear are opposed to each other.

Thus, from the above state, when connecting the rear yoke (46) to the input shaft (25), the driver on the seat (5) reaches for the rear and operates the operating lever of the clutch device (24). With (55),
The lock pin (57) is moved and held upward to be disengaged 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.
When 7) extends the transmission shaft (40), it moves backward together with the rear universal joint (42), and as shown in FIGS.
The female spline portion (50) of the rear yoke (46) is externally fitted to the (25), and is fitted to the male spline portion (49) of the input shaft (25).

After the above fitting, the holding of the lock pin (57) is released, the lock pin (57) is inserted into the lock hole (62), and the equipment cylinder (2
7) is held, for example, at the position moved to the rearmost as the connecting position.

By the way, in the above case, when the equipment cylinder (27) is moved rearward, the upper and lower rollers (38) and (36) of each sliding member (30) are moved.
Rolls on the top and bottom walls of the guide (26).

At this time, the equipment cylinder (27) supporting the rear yoke (46) of the rear universal joint (42) can be moved upward in parallel and vertically by swinging around the support shaft (34) of the sliding member (30). Since the rear yoke (46) is misaligned to the lower side with respect to the input shaft (25), the positioning pin (33) is tapered on the pin receiving body (77). It is inserted in the hole (78) and the input shaft (2
5) is guided by the tapered surface (51) of the rear yoke (46), the sliding member (30) swings around the support shaft (34), and the rear yoke (46) swings.
The misalignment of (46) with respect to the input shaft (25) is corrected, and therefore, the rear yoke (46) can be easily and smoothly connected to the input shaft (25).

As described above, since the rear yoke (46) cannot move parallel to the input shaft (25) downward, the state before the rear yoke (46) and the input shaft (25) are connected is It is preferable to set the normal position of the rear yoke (46) to a position slightly lower than the input shaft (25).

The positioning pin (33) is the stopper (84) of the pin receiver (77).
By contacting the female spline part of the rear yoke (46).
Excessive fitting of the male spline portion (49) of the (50) and the input shaft (25) is prevented.

Further, since the rear portion side of the pin receiving body (77) is opened outward, the fitting degree of the male / female spline portions (49) (50) can be easily confirmed from the outside.

As described above, the work of connecting the tiller (R) to the tractor (1) is completed.

Next, when separating the tiller (R) from the tractor (1), the work is performed in the reverse order of the above.
In the clutch device (24), hold the operation lever (55), move and hold the lock pin (57) upward, pull out from the lock hole (62) of the lock plate (56), and move the operation lever (55) backward. Through the interlocking lever (53) and interlocking link (54)
Move (27) forward and rear universal joint (42) rear yoke (46)
Disconnect the input shaft (25) with the lock pin (57).
Is released, and the bullet pin (57) inserts the lock pin (57) into the lock hole (62) of the lock plate (56) to hold the equipment cylinder (27).

Next, in each blocking device (85), set the operating pin (87)
8) Pull up against the lock plate (86) to the unlocked position, then rotate the operating pin (87) to engage and hold the hooking piece (93) with the upper end surface of the receiving plate (94). The lock plate (86) is set to the lock release position so that the lower coupling shaft (80) of the tiller (R) can be disengaged from the lower engaging portion (22) of the coupling body (14).

In this state, by the hydraulic device (3), the three-point link mechanism (9),
The tiller (R) is lowered through the connecting body (14), and the tiller (75) of the tiller (R) is grounded.

When the three-point link mechanism (9) and the connecting body (14) are further lowered, the tiller (R) tilts forward, and the connecting body (1
4) The lower coupling shaft (80) of the tiller (R) is disengaged from the inside of the lower engaging portion (22), and then the tiller (R) is released from within the upper engaging portion (21) of the linking body (14). By this, the upper connecting shaft (79) is relatively upward, whereby the work of separating the cultivator (R) from the tractor (1) is completed.

7 and 8 show a second embodiment of the present invention.
Each sliding member (30) is provided with an ammunition (39).
Then, each bullet (39) has a swing arm (3
It is wound around the boss part of 5) and one end is swing arm (35).
At the other end, the other end is locked to the support member (31).

In the embodiment, the lower sliding portion of each sliding member is pivotally supported by the equipment cylinder, but the upper sliding portion may be pivotally supported by the equipment cylinder.

Further, in the embodiment, the universal joint is used as the joint for connecting the PTO shaft and the input shaft, but other joints may be used.

Further, although the rotary tiller is used as the working machine in the embodiment, a working machine other than the rotary tiller may be used.

The present invention can also be applied to a device that connects a working machine to the front side of a tractor.

(Effects of the Invention) As described in detail above, according to the present invention, the PT of the tractor is
Even if there is a center misalignment in the vertical direction between the connecting shaft that interlocks with the O-axis and the input shaft of the working machine, the misalignment can be satisfactorily absorbed, and the connecting shaft and the input shaft can be easily connected,
Since the plurality of sliding members are arranged in the guide in the substantially front-rear direction, the equipment cylinder and the connecting shaft can be reliably supported. The present invention has the above advantages and is of great benefit.

[Brief description of drawings]

1 to 6 show a first embodiment of the present invention. Each of FIGS. 1 and 2 is a partial sectional side view of an essential part showing a different operating state, and FIG. 3 is an overall side view. FIG. 4 is a partial cross-sectional front view of the main part, FIG. 5 is a cross-sectional view taken along the line AA of FIG. 4, and FIG.
FIG. 7 is a sectional view taken along the line BB of FIG. 5, FIGS. 7 and 8 show a second embodiment of the present invention, FIG. 7 is a longitudinal side sectional view of an essential part, and FIG. FIG. 7 is a sectional view taken along the line CC of FIG. 7. (1) …… Tractor, (3) …… Working machine lifting hydraulic device, (7)
…… PTO axis, (9) …… 3-point link mechanism, (10) …… Toplink, (11) …… Lower link, (14) …… Coupling, (21)
(22) …… Upper / lower engaging part, (24) …… Clutch device, (25)…
… Input shaft, (26) …… guide, (27) …… equipment barrel, (28) ……
Operating device, (30) …… sliding member, (38) (36) …… upper and lower rollers (sliding part), (39) …… ammo, (46) …… rear yoke (connecting shaft), (79) (80) …… Upper and lower connecting shafts, (85) …… Blocking device,
(R) …… Rotary tiller (working machine).

Claims (1)

[Claims] 1. A connecting body (14) is provided at an end portion of a three-point link mechanism (9) provided on a tractor (1) so as to be able to move up and down, and an upper portion of the connecting body (14) at a central portion in a horizontal direction. And the lower parts of both left and right sides are detachably connected to the working machine (R), and the connecting body (14)
In addition, after the connecting body (14) is connected to the working machine (R), a clutch device (separately interlockingly connects the PTO shaft (7) of the tractor (1) and the input shaft (25) of the working machine (R). 24), the clutch device (24) is a guide (2) which is arranged in the coupling body (14) in a substantially front-back direction and has a top wall portion and a bottom wall portion.
6) and an equipment cylinder having an axial center in the front-rear direction and slidably provided in the guide (26) through the sliding member (30) in the axial direction.
(27), a connecting shaft (46) supported in the equipment cylinder (27) and interlocking with the PTO shaft (7), and an operating device (28) for the equipment cylinder (27). A plurality of (30) are arranged in the guide (26) substantially in the front-rear direction, and each sliding member (30) slides on the top wall and the bottom wall of the guide (26) respectively. Each sliding member (30) has a part (38) (36), and each sliding member (30) is equipped with a sliding part (36) on the same side of the upper and lower sides.
By being pivotally supported around the support shaft (34) in the left-right direction in 7), the equipment cylinder (27) can be translated upwards or downwards and can be swung vertically. It is equipped with an ammunition machine (39) that urges the sliding member (30) to bring the upper and lower sliding parts (38) and (36) into contact with the top and bottom walls of the guide (26), respectively. And the equipment cylinder
(27) is a separation position in which the connecting shaft (46) is separated from the input shaft (25) and the connecting position where the connecting shaft (46) inside is interlockingly connected with the input shaft (25) by moving in the axial direction. The tractor-working machine connecting device is characterized in that the operating device (28) can change the position of the equipment cylinder (27) between the connecting position and the separating position.