JP2000043526A - Carrier vehicle coupling device for passenger vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform smooth oscillation of a truck coupling part relative to a car body and to reduce the occurrence of wear. SOLUTION: In this carrier vehicle coupling device for a passenger vehicle, a pitching ring 5 vertically rotatably coupled around a horizontal pitching shaft 4 in a lateral direction is arranged at a hitch box 3 removably mounted on the rear end part of a lift arm 2 elevating on a tractor vehicle body. A yawing link 7 coupled laterally rotatably around a yawing shaft 6 in a vertical direction is arranged at the rear part of the pitching ring 5. The front part of a truck 9 rotatable around a rolling shaft 8 in a longitudinal shaft in a longitudinal direction is coupled to the rear lower part of the yawing link 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle connecting apparatus for connecting a vehicle such as a trailer to a rear side of a tractor body.

[0002]

In order to connect a truck such as a trailer to the rear side of a passenger vehicle, the front end of a yaw link that is rotatably connected to the front side of the vehicle is connected to a connection hitch on the vehicle body. Connect with yawing freely.
For this reason, even if the transport vehicle is free to roll, the hitch on the vehicle body side is likely to be twisted or twisted in the left-right direction, the transport vehicle connecting portion is not smoothly moved, and uneven wear is likely to occur. .

[0003]

According to the present invention, a hitch box 3 which can be attached to and detached from a rear end of a lift arm 2 which can move up and down with respect to a tractor body 1 is provided so as to be rotatable up and down around a horizontal pitching axis 4. A pitching link 5 to be connected is provided. A yawing link 7 is provided at a rear portion of the pitching link 5 so as to be rotatable left and right around a vertical yawing axis 6. A vehicle connecting device for a passenger vehicle, which is rotatable around a rolling shaft 8 and connects a front portion of a cart 9.

[0004]

The truck 9 connected to the hitch box 3 of the lift arm 2 of the vehicle body 1 via the pitching link 5, the yawing link 7, the rolling shaft 8, and the like.
Are the elevation height of the lift arm 2, the pitching angle about the pitching axis 4, the yawing angle about the yawing axis 6,
And the rolling angle around the rolling axis 8 changes.

[0005] By these many rotating parts, the connecting load of the bogie 9 acts only on the lift arm 2 as a load in the vertical direction.
Uneven wear due to unsteadiness can be reduced, and smooth movement can be maintained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A bogie 9 having a pair of left and right wheels 11 is connected to a rear portion of a tractor body 1 having front wheels 12 and rear wheels 13 and steerable by a steering handle 14, and The vehicle can be driven and towed by the drive of an engine mounted under the front hood 15. Reference numeral 16 denotes a cockpit.

[0007] At the rear of the vehicle body 1, a lift arm 2 is provided so as to be rotatable up and down around a lift shaft 17, and is moved up and down by a lift cylinder 18 which expands and contracts by hydraulic pressure. 19
A rear axle housing at the rear of the vehicle body 1 supports the lift arm 2 on a bracket 20 projecting forward from the center. The hitch box 3 can be attached to and detached from the rear end of the lift arm 2 with an engagement pin 21 and a set pin 22. The hitch box 3 is provided with a hydraulic motor M, and hydraulically transmitted by driving a hydraulic pump on the vehicle body 1 side. This hydraulic motor M can drive a connection working machine.

On the upper side of the hitch box 3, there is provided a pitching link 5 which is turned up and down around a horizontal pitching shaft 4. At the rear side of the pitching link 5, there is provided a yawing link 7 that is rotatable in the left-right direction around a yawing shaft 6 in the vertical direction. The yawing link 7 is provided with a lock plate 23 at the upper end and a lock pin 24 which can be inserted and removed therefrom.
By inserting a lock pin 24 so that the left and right sides of the lower pitching link 5 are sandwiched between the pin holes, the yaw link 7 can be freely yawed by removing the lock pin 24. Become.

The yawing link 7 is formed so that the rear portion is lower than the hitch box 3,
At the lower end, a rolling shaft 8 at the front end of a bogie 9 is fitted into a rolling socket 10 on the side of the yawing link 7 so as to be freely rolled and connected. A caster 25 supports the left and right wheels 11 of the cart 9 in a freely directional manner. A pin hole is formed between the lock plate 26 of the caster 25 and the bottom of the cart 9. By inserting the lock pin 27 into this pin hole, the rotation of the caster 25 can be fixed.

The cart 9 is used for harvesting vegetables.
Harvested vegetables conveyed via a conveyor 28, a shooter 29, and the like provided along one side of the container. Reference numeral 30 denotes an auxiliary seat provided on the front side of the vehicle body 1 and places vegetables to be harvested in the field on the conveyor 28. 31 is a receiving stand, which is provided on the cart 9;
The vegetables conveyed from the shooter 29 are received. The auxiliary worker sorts the vegetables sent from the shooter 29 to the cradle 31 on the trolley 9 and processes the vegetables in a carry or the like while sorting.

When the truck 9 is connected to the vehicle body 1, the lift arm 2 is lowered, and the pitching link 5 previously attached to the truck 9 is connected to the hitch box 3 by the pitching shaft 4. When the running ground changes irregularities,
The rotation of the pitching shaft 4, the yawing shaft 6, and the rolling shaft 8 absorbs a change in the grounding posture of the bogie 9 with respect to the vehicle body 1, so that the bogie 9 can be smoothly towed. It is also possible to reduce deflection of the carriage 9 and uneven wear on each connecting shaft portion.

In FIG. 5, a different point from the above example is that a hitch 33 attached by a pin 32 is provided on the rear side of the vehicle body 1 and a hitch box 34 attached to the hitch 33 is provided.
Output shaft 35 interlocked with the PTO shaft on the vehicle body 1 side
And an input shaft 37 of the work machine 36 connected to the hitch 33 and the like.
The transmission can be switched on and off by the engagement of 39.

An annular grease groove 41 is formed in the inner surface of the clutch claw 40 to accommodate grease in the clutch metal 38 which is fitted with the spline on the input shaft 35 side. . This end face side is fitted with a plate seal 42. A spring 43 presses the clutch metal 38 toward the distal end. The clutch metal 39 on the input shaft 37 side is fitted and supported on the outer periphery of a ball metal 44 that is spline-fitted on the input shaft 37. A steel ball 51 and a grease groove 45 into which grease can be injected are formed in a fitting surface between the clam metal 39 and the ball metal 44.
Stop at 9 and so on. 50 is a clutch claw.

The clutch metal 39 and the ball metal 44 are engaged with each other by a steel ball 51 fitted in the center of the grease groove 45 so as to be able to rotate integrally. The steel ball 51 is lubricated by the grease in the grease groove 45.

[Brief description of the drawings]

FIG. 1 is a side view of a truck connecting portion.

FIG. 2 is a plan view thereof.

FIG. 3 is an overall side view.

FIG. 4 is a plan view thereof.

FIG. 5 is a side view of a hitch portion showing another embodiment, and a side sectional view and a front view of a part thereof.

[Explanation of symbols]

 Reference Signs List 1 tractor body 2 lift arm 3 hitch box 4 pitching axis 5 pitching link 6 yawing axis 7 yawing link 8 rolling axis 9 bogie

Claims (1)

[Claims] A pitching link (5) is provided on a hitch box (3) detachably attached to a rear end of a lift arm (2) that can move up and down with respect to a tractor body (1). This pitching link 5
The rear part of the vehicle is provided with a yaw link 7 which is connected to the yaw link 6 so as to be rotatable left and right around a vertical yaw axis 6.
A vehicle coupling device for a passenger vehicle, which is rotatable around and connects a front portion of a cart 9.