JPH02177802A - Coupling device of working machine of tractor - Google Patents

Abstract

PURPOSE:To simplify mounting and demounting operation by equipping hitches to attach and detach a working device at the rear end of a low link and a top link. CONSTITUTION:A front joint case 1 is foldably coupled through a cross ring 5 to bracket 4 and a rear joint case 2 is foldably connected through a cross ring 11 to a hitch 10 to attach and detach a working device to a tractor. Attitude of the hitch 10 during attaching and detaching of the working device as well as rise and fall control and rolling control of the working device can be freely operated and attaching and detaching of the working machine readily carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a coupling device for a tractor working machine, and can be used in a tillage device and the like.

PRIOR ART AND PROBLEMS TO BE SOLVED BY THE INVENTION In the form in which a tilling device is connected to the rear side of a tractor body by a lower link, a top link, etc., this connection operation is complicated. Therefore, the present invention attempts to facilitate the attachment and detachment operation by providing a hitch for attaching and detaching the working device at the rear end of the lower link and the top link.

(Invention of Claim 1) Means for Solving the Problem This invention provides a pair of front and rear joint cases (1) (2) that are connected and extendable in the axial direction and rotatable around the axis.
), the front joint case (1) is bendably connected to the bracket (4) on the vehicle body (3) side via a cross ring (5), and the rear joint case (2) is A cross ring is attached to the pinch (10) that allows the work device (9) to be attached and detached by being able to move up and down and roll freely by the lower link (7) and top link (8) that are raised and lowered by the lift arm (6) with respect to the vehicle body (3). (11), and the power take-off shaft (12) on the vehicle body (3) side.
The coupling device for a tractor working machine covers the transmission shaft (14) (15) connected between the input shaft (13) on the side of the working device (9) and the input shaft (13) on the side of the working device (9).

Functions and Effects of the Invention The hitch (10) at the rear end of the lower link (7) and top link (8) is raised and lowered by vertical movement of the lift arm (6) to connect the connecting portion of the working device (9). Fit and connect. Raising and lowering this working device (9) is similarly performed by vertically moving the lift arm (6). Vehicle body (3)
If the front joint case 1 to case (1) is different from the front joint case (1) or the rear joint case (2) is different from the pinch (10), these front and rear joint cases (1/) (
2) The inside slides slightly in the axial direction.

Further, the rolling of the working device (9) with respect to the vehicle body (3) is caused by the relative vertical movement difference between the left and right lower links (7).
The pinch (10) rolls and rotates with respect to the bracket (4), thereby causing a gap between the front joint case (1) on the bracket (4) side and the rear joint case (2) on the hitch (10) side. However, it rolls and rotates.

The power of the working device (9) is transmitted from the power take-off shaft (12) to the input shaft (13) via the transmission shafts (1, 4) (1, 5), universal joints, etc. These transmission shafts (14) (
15) is driven and rotated at the center of the front and rear joint cases (1) and (2).

The hitch (10), which is raised and lowered by the lower link (7), top link (8), etc., is connected between the bracket (4) on the vehicle body (3) side and the cross ring (5) (
11), the bendable front joint case (1) and rear joint case (2) are connected to each other so that they can expand and contract in the axial direction and can rotate around the axis. In addition to vertical control and rolling control, the posture of the hitch (10) when attaching and detaching the working device (9) can be freely manipulated, making attachment and detachment easier.

Further, during transmission, the transmission shafts (14, 15) are bent and transmitted between the power take-off shaft (12) and the input shaft (13), so that the transmission of the working device (9) can be maintained smoothly.

(Invention of Claim 2) Means for Solving the Problem This invention provides a bracket (4) on the side of the vehicle body (3) which is extendable in the axial direction and rotatable around the axis.
A front joint case (1) is bendably connected to the vehicle body (3), and a rear joint case is bendably connected to a hitch (10) that can be raised, lowered and rolled with respect to the vehicle body (3) to attach and detach the working device (9). (2), the vehicle body (3)
A coupling device for a tractor working machine is provided with a rolling sensor (16) for detecting the rolling rotation angle of the working device (9) relative to the rotation angle of the working device (9).

Functions and Effects of the Invention As mentioned above, the hitch (10) that moves up and down or rolls with respect to the vehicle body (3) is connected between the front joint case (1) and the rear joint case (2). The rolling rotation angle is detected by the rolling sensor (16), and the rolling control device is feedback-controlled. For example, when the vehicle body (3) tilts to the left or right, this tilt is detected by a horizontal sensor, etc., and the hitch (io) is moved to the opposite side of the vehicle body (3) by raising and lowering the left and right lower links (7). While rolling and detecting this rolling angle with the rolling sensor (16), the working device (9)
control to maintain horizontal position on both sides.

The rolling angle of the hitch (10), which can move up and down and roll freely with respect to the vehicle body (3), is between the front joint [~case (1°) Since this is detected by the rolling sensor (16) installed between the joint case (2), the hitch (10) can be accurately detected in any working position, and this rolling sensor (16) hitch (10)
Since it is integrally attached to the vehicle body (3) side with the lower link (7) and top link (8), etc., the working device (9) only needs to be attached to and detached from the hitch (10). The handling during attachment and detachment is easy.

Embodiment In addition, in the concave side FIGS. 18 to 4, the tractor body (
3) has a front wheel (21) and a rear wheel (17),
It is a four-wheel drive type that is driven by an engine (18) mounted in the front, has a control handle (19), a driver's seat (20), and a hitch (10) at the rear for connecting a working device (9). A bracket h (4,) for mounting the equipment, power take-off shafts (1, 2), a lift 1-arm (6) for raising and lowering the working device (9), etc. are provided.

The bracket h (4) has a power take-off shaft (12
), and connect the front joint (1) to the rear end with a cross ring (5) interposed therebetween in a freely directional manner. (22)
(41) is the horizontal shaft of the cross ring (5) that can be rotated in the vertical direction with respect to this bracket (4), and (41) is the front joint (1).
) is the vertical axis of the cross ring (5) that is rotatable in the left and right directions. The rear end of the front joint (1) is fitted into the front end of the rear joint (2) to be extendable and rotatable.

The hitch (10) has a connecting pin (42) rotatably connecting the rear end of the lower link (7) on the outer side of the rear end, and a cylindrical socket (43) is integrally provided in the center. An input shaft boss (44) on the outer periphery of the input shaft (13) protruding from the working device (9) can be guided and fitted into this socket (43). Further, the rear joint case (2) is directionally connected to the front end of the socket (43) via a cross ring (11). (45) is the horizontal axis of the cross ring (11) that can freely move up and down with respect to the socket (43), and (46) is the vertical axis of the cross ring (11) that can freely rotate left and right with respect to the rear joint (2).

The spline fitting part of the transmission shaft (14) (], 5) is located in the center of the fitting part of the front joint (1) and the rear joint (2), and the power take-off shaft (12) and A universal joint (29) having a cross pin (48) is connected to the transmission shaft (14) at the front and rear ends of the yoke (47),
Additionally, a universal joint (similarly having a cross pin (50) at the front and rear ends of the yoke (49)) is used to connect the input shaft (13) and the spline shaft cylinder (26) that is spline-fitted to the transmission shaft (15). 51). These yokes (47) and (4
9) is located at the center of the cross ring (5) (+, 1.) so that it can rotate freely.

Further, the spline shaft cylinder (26) is rotatably supported within the sockets l to (43). (27) is the input shaft (12)
It is a spline shaft cylinder that is spline-fitted to the shaft.

The connecting pins (42) on both the left and right sides of the hitch (10) include
Lower links (
7) The hitch (10) is raised and lowered by raising and lowering the lift arm (6) whose rear ends are fitted and connected and which are connected to each lower link (7) via a lift rod (23). . Also, one side of the left and right lift rods (23) is equipped with a rolling cylinder (24) that is controlled to expand and contract by hydraulic pressure.
The hitch (10) can be rolled around the axis of the spline shaft cylinder (26) by expanding and contracting the rolling cylinder (24). Also, hitch (10
) is provided with a pin hook (25), which engages with a pin (53) protruding from a side frame (52) that is integral with the body (28) of the working device (9), so that the hitch (10 ) to prevent the working device (9) connected to the work device (9) from detaching. (54) is a spring that springs the bottle hook (25) toward the pin (53).

The working device (1) is used as a tilling device when rotating, and has a horizontal tilling shaft (
30) is mounted on a shaft, and a tilling claw (31) is attached to this tilling shaft (30).
has been set up. This body (28) is provided with a side frame (52), from which the pin (53) is protruded from the front end. (3
3) is a tilling cover that covers the upper circumference of the rotary part of the tilling claw (31), and a leveling plate (34) for leveling the tilled soil is provided at the rear end of the tilling cover (33) so as to be movable up and down. Spring (35
), and the leveling angle of this leveling plate (34) is determined by a leveling sensor (36
) to detect.

(37) An adjustment handle that adjusts the tension of the spring (35) can adjust the vertical angle of the arm (38) that supports the spring relative to the body (28).

The two links (8) are connected between a bracket (54) on the second part of the vehicle body (3) and a mast (55) that is integrated with the hitch (1o) and projects upward. Together with the link (7), it constitutes a link mechanism. An engaging part (56) is provided at the top of this mast (55), and the fuselage (
28) A connecting rod (57) is provided on the top so that it can be rotated back and forth (58).
) can be engaged with the engagement pin (59).

The rolling sensor (1G) consists of a potentiometer and is installed between the front and rear joint cases (1) and (2) to detect the rolling rotation of the rear joint case (1) and (2) with respect to the front joint case (1). Detect the moving angle. (39) is an arm that protrudes from the rotating shaft of the rolling sensor (16), and (4 (1) is a rond that connects this arm (39) and the front joint case (1).

When performing tillage work using a tillage device, in tillage depth control, when a predetermined tillage depth is set using a tillage depth setting device, this tillage depth is detected by a leveling sensor (36) and the lift arm (6) is activated. The plowing depth is maintained at a certain level by controlling the elevation. In addition, in the rolling control, when the horizontal sensor provided on the tractor body (3) detects the left and right inclination, the low link cylinder (24) is controlled to expand and contract, and the tilling device is rolled and rotated to a left and right horizontal posture. The vehicle body (3) is maintained horizontally regardless of its horizontal inclination.

When the tilling device is raised and lowered in this way, use the hitch (10
) and sockets 1 to (43) are rotated up and down relative to the bracket (4) and the front and rear joins j to (1) and (2). At this time, the input shaft (13) is connected to the power output shaft (12) via the universal joint (29), the transmission shaft (14), (15), the universal joint (51), etc. In addition, the low link control is such that the hitch (10) and socket (43) that integrate the working device (9), together with the rear joint case (2),
Connect the transmission shaft (14) to the front joint case (1).
(15) Performed by rotating around.

To connect the working device (9) to the tractor body (3),
Place both of them on the same level ground, move the vehicle body (3) backwards, and attach the hitch (10) to the input shaft boss (
44), and while controlling the vertical movement of the hitch (10) by raising and lowering the lift arm (6), the input shaft boss (44) faces the state in which the socket 1- (43) is fitted into the input shaft boss (44). These input shaft boss (44) and socket (43)
), the pin hook (25) is pushed open against the pin (53) and spring (54) of the side frame (52), and the pin (53) is engaged with this bottle hook (25), and the fuselage is (28) Externally fasten. Further, the connecting rod (57) is rotated forward to lock the engaging pin (59) to the engaging portion (56). Conversely, when disconnecting this connection, remove the connecting rod (57) from the engaging part (56) and attach the bottle hook (25) to the pin (
53) and move the vehicle body (3) forward. At the same time that the input shaft boss (44) comes out of the socket (43), the input shaft (13) also comes out of the spline shaft cylinder (26).

The difference between the embodiments shown in Figs. 5 to 7 is that the cross ring (5) (14) is not provided, and the bracket (4) is
) and the socket (43) of the hitch (10). The horizontal shafts (62) of the front and rear joint cases (1) and (2) are made by making the pin holes (60) and (61) long holes in the front and back.
(63), and engage the front and
The rear joint cases (1), (2) and the hitch (10) are configured to be freely changeable in the left and right directions.

In addition, the transmission shaft (15) fits into the spline of the transmission shaft (15).
The spline portion (64) of 4) is loosely fitted and formed short, and the spline portion (65) of the spline shaft cylinder (26) that fits into the spline of the input shaft (13) is also loosely fitted. It is formed short.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a partial plan sectional view, Fig. 2 is a side view thereof, Fig. 3 is a side view of the whole,
FIG. 4 is a partial front sectional view, FIG. 5 is a partial plan sectional view showing a different example, and FIG. 6 is a side view thereof. In the figure, (1) is the front joint, (2) is the rear joint, (3) is the vehicle body, (4) is the bracket, (5) is the cross ring, (6) is the lift arm, and (7) is the lower link. , (8) is the top link, (9) is the work device, (10)
is a hit, (1,1,) is a cross ring, (12)
is the power take-off shaft, (13) is the input shaft, (1,4) (
1 and 5) are transmission shafts, and (16) is a rolling sensor.

Claims (1)

[Claims] 1. Of a pair of front and rear joint cases (1) and (2) connected to each other so as to be freely extendable in the axial direction and freely rotatable around the axis, the front joint case (1) is connected to the vehicle body ( The rear joint case (2) is refractably connected to the bracket (4) on the side (3) through a cross ring (5), and the rear joint case (2)
) A cross ring (11) is attached to a hitch (10) that attaches and detaches a working device (9) by allowing it to be raised and lowered and rolled freely by a lower link (7) and a top link (8) that are raised and lowered by a lift arm (6). A power transmission shaft (14) ( 15) A coupling device for a tractor working machine. 2. A front joint case (1) which is extendable in the axial direction and rotatable around the axis, and which is bendably connected to the bracket (4) on the side of the vehicle body (3);
) with respect to the working device (9
) A rolling sensor (16) for detecting the rolling rotation angle of the working device (9) with respect to the vehicle body (3) is installed between the rear joint case (2) which is bendably connected to the hitch (10) for attaching and detaching the vehicle body (3). A connecting device for a tractor working machine.