Tractor lifting control mechanism

Abstract

A tractor lifting control mechanism comprises a control rod, a long rotating shaft, a shaft support, a rotating cylinder, an adjusting washer, a cotter pin, a rocker arm, a connecting fork and a lifting control support, the bottom of the control rod penetrates through a floor and then is welded to one end of the surface of the rotating cylinder, and the inner wall of the rotating cylinder is connected to the long rotating shaft through a lining; adjusting washers are arranged between the two ends of the rotating drum and the corresponding shaft supports, the two ends of the long rotating shaft extend out of the shaft supports and then are provided with pin holes and fixed through cotter pins, the shaft supports are welded to the side face of a lifting control support, and the bottom of the lifting control support is fixed to a chassis. According to the utility model, the lifting control bracket is fixed on the chassis, so that the problem of unstable control of the multi-way valve caused by asynchronous vibration of the rear floor and the chassis is solved; a boss on one side of the long rotating shaft is omitted, and through the mode that cotter pins are arranged at the two ends, gaskets on the left side and the right side can be conveniently and flexibly increased or decreased to adjust the position of the operating rod during assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a lifting and operating mechanism for a tractor. Background Art

[0002] The lifting control structure of the tractor controls the opening and closing of the multi-way valve oil circuit by changing the position of the lifting handle assembly, thereby realizing the lifting, lowering and floating functions of the suspension mechanism. When the tractor is working, since the existing lifting control structure is fixed on the rear floor, it is easy to cause instability in the multi-way valve operation, causing the multi-way valve oil port valve to frequently switch between the open and closed positions, resulting in the vibration of the suspension mechanism. Specifically, since the rear floor and the chassis of the tractor are connected by a rubber shock absorber, the vibration frequency of the rear floor and the chassis is different. When the lifting handle operates the suspension mechanism to move, it will cause the vibration of the rear floor welding and the chassis to be out of sync, resulting in instability in the multi-way valve operation.

[0003] Since the joystick in the original lifting control structure is welded on the long shaft, and the right end of the original long shaft is positioned by a boss, when it is found during assembly that the joystick needs to be adjusted to one end due to manufacturing error, all parts need to be removed, and a suitable gasket is added to the right side of the original long shaft and reassembled. If it is not suitable, the above steps need to be repeated, making the assembly more cumbersome. Therefore, it is necessary to develop a reasonable tractor lifting control mechanism to solve the above problems. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model aims to provide a tractor lifting control mechanism to solve the problem of unstable operation of the multi-way valve and inconvenient assembly caused by the vibration asynchronism between the rear floor and the chassis.

[0005] The utility model is realized by the following technical solutions:

[0006] The tractor lifting control mechanism comprises: a control lever, a long rotating shaft, an axle bracket, a rotating drum, an adjusting washer, a cotter pin, a rocker arm, a connecting fork and a lifting control bracket, wherein the bottom of the control lever is welded to one end of the surface of the rotating drum after passing through the floor, the inner wall of the rotating drum is supported on the long rotating shaft by a bushing, and an adjusting washer is placed between the two ends of the rotating drum and the corresponding axle brackets, the two ends of the long rotating shaft are extended out of the axle bracket and are provided with pin holes and fixed with cotter pins, the axle bracket is welded to the side surface of the lifting control bracket, a gap is left between the surface of the rotating drum and the side surface of the lifting control bracket, the other end of the surface of the rotating drum is welded to the rocker arm, the control lever and the rocker arm are parallel and located on both sides of the rotating drum, the bottom of the rocker arm is fixedly connected to a connecting fork by a pin shaft, the connecting fork is connected to the oil port valve of the multi-way valve by a connecting rod, and the bottom of the lifting control bracket is fixed to the chassis.

[0007] Preferably, a sealing sleeve is provided on the joystick at the position where the joystick is about to pass through the bottom plate, and a shock-absorbing gasket is additionally provided between the sealing sleeve and the floor.

[0008] Preferably, the lifting control bracket and the shuttle gear bracket are cooperated and arranged at two ends of the chassis.

[0009] Preferably, the adjusting gasket is made of flexible material.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model sets the installation point of the original operating mechanism on the lifting operating bracket instead of the floor, and fixes the lifting operating bracket on the chassis, so as to rigidly connect the entire lifting operating mechanism with the chassis, thereby solving the problem of unstable operation of the multi-way valve caused by the asynchronous vibration of the rear floor and the chassis, and avoiding the resonance phenomenon caused by the asynchronous vibration; the boss on one side of the long rotating shaft is eliminated, and by setting cotter pins at both ends, it is convenient to flexibly add or remove gaskets on the left and right sides during assembly to adjust the position of the operating lever.

[0012] 2. By arranging the lifting control bracket and the shuttle gear bracket at both ends of the chassis, the force of the chassis is balanced, welding and transportation are convenient, and production costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a structural diagram of the lifting and operating mechanism of the tractor of the utility model;

[0015] Figure 2 for Figure 1 Side view of

[0016] Figure 3 This is a schematic diagram of the structure of the utility model for adjusting the position of the long rotating shaft.

[0017] Among them, there are operating lever 1, long rotating shaft 2, shaft bracket 3, rotating drum 4, adjusting washer 5, cotter pin 6, rocker arm 7, connecting fork 8, lifting operating bracket 9, floor 10, bushing 11, pin shaft 12, chassis 13, sealing sleeve 14, cotter pin 15, shock absorbing gasket 16, and shuttle gear bracket 17. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings. Figure 1-3 The invention discloses a lifting control mechanism for a tractor, comprising: a joystick 1, a long rotating shaft 2, an axle bracket 3, a rotating drum 4, an adjusting washer 5, a cotter pin 6, a rocker arm 7, a connecting fork 8 and a lifting control bracket 9. The bottom of the joystick 1 is welded to one end of the surface of the rotating drum 4 after passing through a floor 10. The inner wall of the rotating drum 4 is supported on the long rotating shaft 2 by a bushing 11. The axle bracket 3 is welded to the side of the lifting control bracket 9. A gap is left between the surface of the rotating drum 4 and the side of the lifting control bracket 9. The other end of the surface of the rotating drum 4 is welded to the rocker arm 7. The joystick 1 and the rocker arm 7 are parallel and arranged on both sides of the rotating drum 4. The bottom of the rocker arm 7 is fixedly connected to the connecting fork 8 by a pin shaft 12. The connecting fork 8 is connected to the oil port valve of the multi-way valve by a connecting rod. The bottom of the lifting control bracket 9 is fixed to the chassis 13. At this time, the entire lifting control mechanism is rigidly connected to the chassis 13, replacing the original floor connection and shock-absorbing pad design, solving the problem of unstable multi-way valve operation and shaking of the tractor suspension mechanism caused by the asynchronous vibration of the rear floor and chassis.

[0020] Adjustment washers 5 are placed between the two ends of the rotating drum 4 and the corresponding shaft brackets 3. The two ends of the long rotating shaft 2 are provided with pin holes after extending out of the shaft bracket 3 and fixed with split pins 15. The boss on one side of the original long rotating shaft 2 is eliminated. By providing split pins 6 at both ends, it is convenient to flexibly add or remove adjustment washers 5 on the left and right sides during assembly to adjust the position of the joystick 1. Preferably, the adjustment washers 5 are made of flexible materials and can be elastically deformed by extrusion to ensure full contact between the adjustment washers 5 and the two ends of the long rotating shaft 2, which is conducive to the precise assembly of the long rotating shaft 2, that is, the position of the joystick 1.

[0021] In order to increase the comfort of operating the joystick 1, Figure 2 A sealing sleeve 14 is provided on the joystick 1 at the position where it will pass through the bottom plate, and a shock-absorbing gasket 16 is added between the sealing sleeve 14 and the floor 10, thereby increasing the flexibility of the connection and reducing the sense of frustration when pulling.

[0022] exist Figure 1The bottom position shows the following information: the lifting control bracket 9 and the shuttle gear bracket 17 are arranged at both ends of the chassis 13. This can balance the force of the chassis, facilitate welding and transportation, and reduce production costs.

[0023] The working principle of this utility model:

[0024] like Figure 1 The bottom of the operating lever 1 is welded to one end of the surface of the rotating drum 4, the inner wall of the rotating drum 4 is supported on the long rotating shaft 2 by a bushing 11, the shaft bracket 3 is welded to the side of the lifting operating bracket 9, and the bottom of the lifting operating bracket 9 is fixed to the chassis 13, thereby rigidly connecting the entire lifting operating mechanism to the chassis 13 to ensure the problem of asynchronous vibration during operation.

[0025] like Figure 3 Adjustment washers 5 are placed between the two ends of the rotating drum 4 and the corresponding shaft bracket 3. The two ends of the long rotating shaft 2 are extended out of the shaft bracket 3 and are provided with pin holes and fixed with cotter pins 15. The boss on one side of the original long rotating shaft 2 is cancelled. By setting cotter pins 6 at both ends, it is convenient to flexibly add or remove adjustment washers 5 on the left and right sides during assembly to adjust the position of the joystick 1.

[0026] The other end of the surface of the drum 4 is welded to the rocker arm 7. The operating lever 1 and the rocker arm 7 are parallel and located on both sides of the drum 4. The bottom of the rocker arm 7 is fixedly connected with a connecting fork 8 through a pin shaft 12. The connecting fork 8 is connected to the oil port valve of the multi-way valve through a connecting rod, thereby completing the installation of the entire tractor lifting operating mechanism.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tractor lifting and operating mechanism, characterized in that: include: A joystick (1), a long rotating shaft (2), an axle bracket (3), a rotating drum (4), an adjusting washer (5), a split pin (6), a rocker arm (7), a connecting fork (8) and a lifting operating bracket (9); the bottom of the joystick (1) is welded to one end of the surface of the rotating drum (4) after passing through a floor (10); the inner wall of the rotating drum (4) is supported on the long rotating shaft (2) by a bushing (11); an adjusting washer (5) is placed between the two ends of the rotating drum (4) and the corresponding axle bracket (3); the two ends of the long rotating shaft (2) are provided with pin holes and are opened by openings. The shaft bracket (3) is welded to the side of the lifting operating bracket (9), a gap is left between the surface of the rotating cylinder (4) and the side of the lifting operating bracket (9), the other end of the surface of the rotating cylinder (4) is welded to the rocker arm (7), the operating rod (1) and the rocker arm (7) are parallel and arranged on both sides of the rotating cylinder (4), the bottom of the rocker arm (7) is fixedly connected to a connecting fork (8) through a pin shaft (12), the connecting fork (8) is connected to the oil port valve of the multi-way valve through a connecting rod, and the bottom of the lifting operating bracket (9) is fixed on the chassis (13).

2. The tractor lifting and operating mechanism according to claim 1, characterized in that: A sealing sleeve (14) is provided on the joystick (1) at the position where the joystick (1) is about to pass through the bottom plate, and a shock-absorbing gasket (16) is additionally provided between the sealing sleeve (14) and the floor (10).

3. The tractor lifting and operating mechanism according to claim 1, characterized in that: The lifting control bracket (9) and the shuttle-shaped gear bracket (17) are arranged at both ends of the chassis (13) in cooperation with each other.

4. The tractor lifting and operating mechanism according to claim 1, characterized in that: The adjusting washer (5) is made of a flexible material.

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