Mechanical power-assisted structure of tractor

Abstract

The utility model relates to the field of clutch boosting systems of tractors, in particular to a mechanical boosting structure of a tractor, which comprises a frame and a clutch, a clutch boosting mounting support is mounted on the upper portion of the frame, a pedal shaft is mounted on the clutch boosting mounting support, and a first pedal rocker arm and a second pedal rocker arm are sleeved on the pedal shaft. The first pedal rocker arm is movably connected with an upper pull rod, the upper pull rod is connected with an adjusting pipe, a main clutch lower pull rod is arranged in the adjusting pipe in a sleeved mode, a release bearing is arranged on the side of the clutch, the release bearing is connected with a main clutch shifting fork, and the first pedal rocker arm is movably connected with the first pedal rocker arm. The problems that in the prior art, a hydraulic oil cylinder and a spring assembly structure are used for assisting power, a hydraulic oil cylinder is directly operated through a pedal to achieve power assisting, the service life is affected by too large pressure of a hydraulic system, oil leakage is likely to happen, and part of power assisting is achieved through the spring assembly structure, but a spring is not lubricated, and clamping stagnation, elastic force sudden change and abnormal sound are likely to happen are solved.

Description

Technical Field

[0001] The utility model relates to the field of a tractor clutch power-assisting system, in particular to a tractor mechanical power-assisting structure. Background Art

[0002] High-horsepower tractors are prone to driver fatigue due to their large clutch size, large operating force and long working hours. In order to reduce the driver's labor intensity, clutch power-assist structures are widely used in high-horsepower tractors.

[0003] The existing tractor clutch assist structure generally uses a hydraulic cylinder assist and a spring assembly structure. The assist is achieved by directly operating the hydraulic cylinder through the pedal. Although the problem of large operating force is solved, the cylinder requires the hydraulic system to provide pressure. Excessive pressure in the hydraulic system will affect the service life and is prone to oil leakage and abnormal noise problems. Some tractors use a spring assembly structure to assist. Although the reliability problem can be solved, the spring is not lubricated and is prone to jamming, sudden changes in elastic force and abnormal noise problems. Utility Model Content

[0004] The purpose of the utility model is to provide a mechanical power-assisting structure for tractors to solve the current method of using hydraulic cylinder power-assisting and spring assembly structures. The power-assisting is achieved by directly operating the hydraulic cylinder through the pedal. Although the problem of large operating force is solved, the cylinder requires the hydraulic system to provide pressure. Excessive pressure in the hydraulic system will affect the service life and easily cause oil leakage and abnormal noise problems. Although the power-assisting structure partially uses the spring assembly structure, although the reliability problem can be solved, the spring has no lubrication and is prone to jamming, sudden elastic force changes and abnormal noise problems. The technical solutions adopted by the utility model are as follows:

[0005] A tractor mechanical power-assisting structure comprises a frame and a clutch, wherein a clutch power-assisting mounting bracket is installed on the upper part of the frame, and a lower bracket is installed on the lower part, a pedal shaft for a main clutch pedal is rotatably mounted on the clutch power-assisting mounting bracket, a first pedal rocker arm and a second pedal rocker arm are sleeved on the pedal shaft, the first pedal rocker arm is movably linked to an upper pull rod, the upper pull rod is connected to an adjusting pipe, a main clutch lower pull rod is sleeved in the adjusting pipe, and further comprises a first power-assisting mechanism, one end of the first power-assisting mechanism is connected to the second pedal rocker arm, and the other end is connected to the lower bracket, the main clutch lower pull rod is movably connected to a second power-assisting mechanism, the second power-assisting mechanism is connected to a third power-assisting mechanism through an adjusting rod, a release bearing is arranged beside the clutch, a release bearing seat is arranged beside the release bearing, a main clutch fork is arranged beside the release bearing seat, the release bearing is connected to the main clutch fork through a pin shaft, and further comprises a main clutch return spring, one end of the main clutch return spring is fixed on the pin shaft, and the other end is connected to an oil seal seat.

[0006] It is further defined that the clutch booster mounting bracket is divided into a front clutch booster mounting bracket and a rear clutch booster mounting bracket, and the pedal shaft sleeve is connected with a torsion spring and is located between the front clutch booster mounting bracket and the rear clutch booster mounting bracket;

[0007] It is further defined that the first power-assisting mechanism includes a guide tube and a guide rod, the guide rod is installed in the guide tube, the upper end of the guide rod passes through the guide tube and is connected to the lower end of the second pedal rocker arm, a limit plate is provided on the guide rod located in the guide tube, a compression spring is sleeved on the guide rod below the limit plate, a guide rod base is installed at the lower part of the guide tube, the guide rod base is fixed on the lower bracket, the inside of the guide tube 10 is filled with grease, and an oil groove is provided on the guide rod 11.

[0008] It is further defined that the second power assist mechanism is an intermediate rocker arm, one end of which is movably connected to the lower end of the main clutch lower pull rod, and the other end of which is connected to the adjusting rod.

[0009] It is further defined that the third power-assisting mechanism includes a main clutch rocker arm and a driven clutch rocker arm, the main clutch rocker arm is movably connected to the adjusting rod, and the main clutch rocker arm and the driven clutch rocker arm are welded.

[0010] The beneficial effects of the utility model compared with the current technology are:

[0011] 1. It can provide greater assistance to the pedals, greatly reducing the difficulty of operation for the driver.

[0012] 2. It can effectively avoid the hydraulic system failure points caused by the hydraulic power-assisting structure, and the full mechanical structure greatly improves the system reliability.

[0013] 3. The guide rod is equipped with an oil groove to effectively lubricate the system, making the operation smooth, greatly reducing the movement resistance and improving the product usage experience.

[0014] 4. Double guidance, sufficient lubrication, small rotation angle of the assist spring, large operating force arm, simple parts manufacturing, greatly improving the driver's operating experience.

[0015] 5. The pedal and power-assisting parts can be assembled separately with the bracket to form a power-assisting mechanism, which greatly improves the convenience of product installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a main schematic diagram of the utility model;

[0017] Figure 2 This is the calculation principle diagram of the mechanical power assist of the tractor of this utility model.

[0018] The markings in the figure correspond to: 1-frame, 2-clutch assist mounting bracket, 3-lower bracket, 4-main clutch pedal, 5-pedal shaft, 6-first pedal rocker arm, 7-second pedal rocker arm, 8-upper pull rod, 9-adjusting tube, 10-guide tube, 11-guide rod, 12-limiting plate, 13-compression spring, 14-main clutch lower pull rod, 15-base with guide rod, 16-intermediate rocker arm, 18-adjusting rod, 19-main clutch rocker arm, 20-driven clutch rocker arm, 21-clutch, 22-release bearing, 23-release bearing seat, 24-main clutch fork, 26-main clutch return spring, 27-torsion spring, 28-oil seal seat. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the utility model, the technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments. Example

[0020] like Figure 1 and Figure 2 As shown, a tractor mechanical power-assisting mechanism comprises a frame 1 and a clutch 21, a clutch power-assisting mounting bracket 2 is installed on the upper part of the frame 1, and a lower bracket 3 is installed on the lower part, a pedal shaft 5 for a main clutch pedal 4 is rotatably mounted on the clutch power-assisting mounting bracket 2, and a first pedal rocker arm 6 and a second pedal rocker arm 7 are sleeved on the pedal shaft 5, the clutch power-assisting mounting bracket 2 is divided into a front clutch power-assisting mounting bracket and a rear clutch power-assisting mounting bracket, the pedal shaft 5 is sleeved with a torsion spring 27 and is located between the front clutch power-assisting mounting bracket and the rear clutch power-assisting mounting bracket, the first pedal rocker arm 6 is rotatably connected to an upper pull rod 8, the upper pull rod 8 is fixedly connected with an adjusting tube 9, a main clutch lower pull rod 14 is sleeved in the adjusting tube 9, and also comprises a first power-assisting mechanism, a second power-assisting mechanism and a third power-assisting mechanism, the first power-assisting mechanism comprises a guide tube 10 and a guide rod 11, the guide The guide rod 11 is installed in the guide tube 10, and the upper end of the guide rod 11 passes through the guide tube 10 and is connected to the lower end of the second pedal rocker arm 7. A limit plate 12 is arranged on the guide rod 11 located in the guide tube 10, and a compression spring 13 is sleeved on the guide rod 11 below the limit plate 12. A guide rod base 15 is installed at the lower part of the guide tube 11, and the guide rod base 15 is fixed on the lower bracket 3. The inside of the guide tube 10 is filled with grease, and an oil groove is arranged on the guide rod 11. The second power-assisting mechanism is an intermediate rocker arm 16, one end of the intermediate rocker arm 16 is rotatably connected to the lower end of the main clutch lower pull rod 14, and the other end is rotatably connected to the adjusting rod 18. The third power-assisting mechanism includes a main clutch rocker arm 19 and a driven clutch rocker arm 20, the main clutch rocker arm 19 is rotatably connected to the adjusting rod 18, and the main clutch rocker arm 19 and the driven clutch rocker arm 20 are welded.

[0021] A release bearing 22 is arranged beside the clutch 21, and a release bearing seat 23 is arranged beside the release bearing 22. The release bearing seat 23 is connected to the main clutch fork 24 through a pin shaft, and also includes a main clutch return spring 26. One end of the main clutch return spring 26 is fixed on the pin shaft, and the other end is connected to the oil seal seat 28.

[0022] When in use, the main clutch pedal 4 rotates around the pedal shaft 5, driving the upper pull rod 8 to move, the upper pull rod 8 drives the adjusting tube 9 and the main clutch lower pull rod 14 to move, the main clutch lower pull rod 14 drives the intermediate rocker arm 16 to rotate, the intermediate rocker arm 16 drives the main clutch rocker arm 19 and the driven clutch rocker arm 20 to rotate through the adjusting rod 18, the release bearing 22 compresses the release claw of the clutch 21 to achieve the connection and disconnection of the tractor power, when the main clutch pedal 4 drives the upper pull rod 8 to move, the second pedal rocker arm drives the guide rod 11 to compress the compression spring 11, during the movement, the compression amount of the compression spring 11 changes from small to large and then from large to small, that is, the energy is stored in the early stage, and the spring releases the energy in the later stage to achieve the power assistance effect, and the torsion spring 27 provides linear power assistance during the movement. In this structure, the guide tube 10, the guide rod 11, and the guide rod bottom The seats 15 all play a guiding role, the compression spring is evenly stressed, the guide tube 10 is filled with grease, and the guide rod 11 is provided with an oil groove, which effectively lubricates the system and operates smoothly. The guide tube 10, the guide rod 11, the guide rod base 15 and the compression spring 11 rotate around the pedal shaft 5 with the movement of the pedal. The operating angle is small and the force arm length is large, which can produce a large assist effect on the pedal, effectively ensuring the reliability of the system while greatly reducing the driver's workload. At the same time, the clutch assist mounting bracket 2, the guide tube 10, the guide rod 11, the compression spring 13, the guide rod base 15, the torsion spring 27, and the main clutch pedal 4 form a clutch assist assembly as an assembly to complete the assembly, and it is directly installed on the cab as a power assist mechanism assembly, with good interchangeability, eliminating the driver's adjustment steps, and effectively avoiding clutch damage caused by user adjustment errors.

[0023] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "first", "second", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] The above is a detailed introduction to a tractor mechanical power-assisting system provided by the utility model. The description of the specific embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the utility model, several improvements and modifications can be made to the utility model, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

Claims

1. A mechanical power assist structure for a tractor, comprising a frame (1) and a clutch (21), wherein a clutch power assist mounting bracket (2) is mounted on the upper portion of the frame (1), and a lower bracket (3) is mounted on the lower portion, characterized in that: The clutch assist mounting bracket (2) is rotatably mounted with a pedal shaft (5) for a main clutch pedal (4); a first pedal rocker arm (6) and a second pedal rocker arm (7) are sleeved on the pedal shaft (5); the first pedal rocker arm (6) is movably connected to an upper pull rod (8); the upper pull rod (8) is connected to an adjustment tube (9); a main clutch lower pull rod (14) is sleeved in the adjustment tube (9); and a first assist mechanism is also included; one end of the first assist mechanism is connected to the second pedal rocker arm (7) and the other end is connected to the lower bracket (3); the main clutch lower pull rod (14) is sleeved in the adjustment tube (9). ) is movably connected with a second power-assisting mechanism, the second power-assisting mechanism is connected to the third power-assisting mechanism via an adjusting rod (18), a release bearing (22) is arranged beside the clutch (21), a release bearing seat (23) is arranged beside the release bearing (22), a main clutch fork (24) is arranged beside the release bearing seat (23), the release bearing seat (23) is connected to the main clutch fork (24) via a pin shaft, and also includes a main clutch return spring (26), one end of the main clutch return spring (26) is fixed on the pin shaft, and the other end is connected to the oil seal seat (28).

2. A tractor mechanical power assist structure according to claim 1, characterized in that: The clutch assist mounting bracket (2) is divided into a front clutch assist mounting bracket and a rear clutch assist mounting bracket, and the pedal shaft (5) is sleeved with a torsion spring (27) and is located between the front clutch assist mounting bracket and the rear clutch assist mounting bracket.

3. A tractor mechanical power-assisting structure according to claim 1, characterized in that: The first assist mechanism comprises a guide tube (10) and a guide rod (11), wherein the guide rod (11) is installed in the guide tube (10), the upper end of the guide rod (11) passes through the guide tube (10) and is connected to the lower end of the second pedal rocker arm (7), a limit plate (12) is provided on the guide rod (11) located in the guide tube (10), a compression spring (13) is sleeved on the guide rod (11) below the limit plate (12), and a guide rod base (15) is installed at the lower part of the guide tube (10), and the guide rod base (15) is fixed on the lower bracket (3).

4. A tractor mechanical power-assisting structure according to claim 1, characterized in that: The second assist mechanism is an intermediate rocker arm (16), one end of which is movably connected to the lower end of the main clutch lower pull rod (14), and the other end of which is connected to the adjustment rod (18).

5. The mechanical power-assisting structure of a tractor according to claim 1, characterized in that: The third assist mechanism comprises a main clutch rocker arm (19) and a driven clutch rocker arm (20), the main clutch rocker arm (19) is movably connected to the adjustment rod (18), and the main clutch rocker arm (19) and the driven clutch rocker arm (20) are welded.

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