Operating handle and engineering machinery

Abstract

The utility model relates to an operating handle, in particular to an operating handle and engineering machinery, the operating handle comprises a mounting base, a reset assembly and an adjusting device, the reset assembly is mounted on the mounting base and used for resetting a deflection part, the reset assembly comprises a plurality of reset springs, and the adjusting device comprises a lifting platform and a lifting driving device. The lifting table abuts against the lower ends of the reset springs. The lifting driving device is arranged below the lifting table, connected with the lifting table through a worm and used for driving the lifting table to move up and down to compress or release the reset spring. According to the utility model, the lifting driving device can be used for carrying out lifting adjustment on the lifting platform, so that the pre-compression amount of the reset spring is adjusted, the spring force of compression deformation of the reset spring is adjusted when the operating rod swings, and the operating force of the swinging operating handle is adjusted.

Description

Technical Field

[0001] The utility model relates to an operating handle, and more particularly to an operating handle and engineering machinery. Background Art

[0002] An operating handle is a mechanical accessory that facilitates operator control of construction machinery and is widely used in hydraulic excavators, loaders, cranes, bulldozers, and other construction machinery. When using an operating handle to control construction machinery, the operator swings the handle, driving the valve stem of a pilot control valve or moving an inductive device, outputting pilot pressure oil or an electrical signal from the handle. This pilot pressure oil acts on the spool of the hydraulic main valve, or the controller, based on the handle's electrical signal, outputs a control current to the electric proportional valve or solenoid that controls the hydraulic main valve, thereby controlling the flow and direction of the hydraulic system.

[0003] An operating handle typically consists of a mounting base, an operating lever universally mounted on the mounting base, a deflector driven by the operating lever, and a reset assembly for resetting the deflector. The deflector is connected to the valve stem of the pilot valve or an inductive element. Manually swinging the operating lever during operation moves the deflector. This movement compresses a spring in the reset assembly, driving the valve stem of the pilot valve or the inductive element to output pilot pressure oil or an electrical signal. When the operating lever is released, the spring in the reset assembly pushes the deflector, resetting the operating lever.

[0004] In existing operating handles, the reset spring in the reset assembly is mounted on a mounting base with a fixed pre-compression value, resulting in a constant operating force. However, due to differences in operator size and arm strength, the same operating handle cannot meet the operating force requirements of different operators, affecting the operating feel and even causing arm soreness after prolonged operation. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the operating force of an operating handle cannot be adjusted, and an operating handle and an engineering machine are provided.

[0006] The technical solution for achieving the purpose of the present invention is: an operating handle, comprising a mounting base, a reset assembly mounted on the mounting base for resetting the deflection member, and an adjusting device, wherein the reset assembly comprises a plurality of reset springs, wherein the adjusting device comprises:

[0007] The lifting platform abuts against the lower end of each return spring. When the lifting platform rises, it compresses the return spring, increasing the pre-compression of the return spring, thereby increasing the force required to swing the swing operating lever. When the lifting platform descends, it releases the return spring, reducing the pre-compression of the return spring, thereby reducing the force required to swing the swing operating lever.

[0008] The lifting drive device is arranged below the lifting platform and connected to the lifting platform through a worm gear, and is used to drive the lifting platform to move up and down to compress or release the return spring.

[0009] In the operating handle of the present invention, a plurality of spring guide holes are provided at the lower portion of the mounting base, and the reset springs are arranged in the spring guide holes.

[0010] In the operating handle of the present invention, the spring guide hole is formed by the inner hole of a round tube whose upper end is fixedly connected to the base body of the mounting base. Furthermore, the lower end hole wall of the spring guide hole has a limit ring for limiting the release stroke of the lower end of the reset spring.

[0011] In the operating handle of the present invention, the lifting platform is provided with a boss which can extend into the spring guide hole and abut against the lower end of the return spring, and the boss on the lifting platform corresponds to the spring guide hole one by one.

[0012] In the operating handle of the present invention, the mounting base further comprises a barrel-shaped or cylindrical bottom shell, the bottom shell is fixedly connected to the base body at the upper opening, and the adjusting device is arranged in the bottom shell.

[0013] In the operating handle of the present invention, the lifting drive device includes a motor connected to the worm, and an electric signal connector connected to the motor and arranged outside the bottom shell.

[0014] In the operating handle of the present invention, a wire groove and a wire lead hole for laying an electric signal wire harness of an electric signal connector are provided on the inner wall of the bottom shell.

[0015] In the operating handle of the present invention, a pilot valve or a sensor connected to the deflecting member is provided in the mounting base.

[0016] The technical solution for achieving the purpose of the utility model is: an engineering machine having the above-mentioned operating handle.

[0017] Compared with the prior art, in the present invention, the lifting platform can be raised and lowered by the lifting drive device, thereby adjusting the pre-compression amount of the return spring, and the spring force of the return spring compressed and deformed when the operating lever swings is adjusted, thereby adjusting the operating force of the swinging operating handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the operating handle of the utility model.

[0019] Figure 2 It is an exploded schematic diagram of the operating handle of the utility model.

[0020] Figure 3This is a schematic diagram of the installation of the return spring in the operating handle of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the bottom shell of the operating handle of the utility model.

[0022] Figure 5 It is a structural schematic diagram of the adjustment device in the operating handle of the utility model.

[0023] Parts names and serial numbers in the figure:

[0024] Install the base 10, base body 11, bottom shell 12, wire groove 121, lead hole 122, round tube 20, spring guide hole 21, limit clamp 22, return spring 30, lifting platform 40, boss 41, lifting drive device 50, motor 51, worm 52, electrical signal connector 53, operating lever 60, and sheath 70. DETAILED DESCRIPTION

[0025] The specific implementation scheme is described below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the operating handle includes a mounting base 10, a reset assembly mounted on the mounting base 10 for resetting the deflection member (not shown), and an adjustment device, wherein the reset assembly includes a plurality of reset springs 30. The adjustment device includes a lifting platform 40 and a lifting drive device 50.

[0027] The lifting platform 40 abuts against the lower ends of the return springs 30; when the lifting platform 40 rises, it compresses the return springs 30, increasing the pre-compression of the return springs 30. When the lifting platform 40 descends, it releases the return springs 30, reducing the pre-compression of the return springs 30, thereby reducing the force required to swing the swing operating lever 60.

[0028] The lifting drive device 50 is arranged below the lifting platform 40 and connected to the lifting platform 40 through a worm 52 , and is used to drive the lifting platform 40 to move up and down to compress or release the return spring 30 .

[0029] The operating handle comprises a base body 11, to which an operating rod 60 is mounted via a universal joint. A sheath 70 is mounted on the upper portion of the base body 11, from which the operating rod 60 extends. A deflector is mounted on the base body 11. If the operating handle is a pilot handle, a pilot valve is also mounted on the base body 11. The valve stem of the pilot valve is connected to the deflector. The deflection of the deflector moves the valve stem of the pilot valve, causing the pilot valve to output pilot pressure oil. If the operating handle is an electronic control handle, a sensor is mounted on the base body 11 and connected to the deflector. The deflection of the deflector generates an electrical signal from the sensor.

[0030] When the operating lever 60 is swung, the deflector member deflects. This movement, while simultaneously actuating the valve stem of the pilot valve or sensor, compresses the reset spring 30 of the reset assembly in the corresponding direction. When the operating lever 60 is released, the compressed reset spring 30 in the reset assembly pushes the deflector member back to its original position. This reset movement, in turn, resets the operating lever 60, the pilot valve, or the sensor.

[0031] In this embodiment, the lifting platform 40 can be raised and lowered by the lifting drive 50. As the lifting platform 40 rises, the pre-compression of the return spring 30 increases, thereby increasing the force required to swing the swing operating lever 60. As the lifting platform 40 descends, the return spring 30 releases, reducing the pre-compression, thereby reducing the force required to swing the swing operating lever 60. By controlling the lifting drive 50, the force required to swing the operating handle 60 can be adjusted to meet the operational needs of different operators.

[0032] Optionally, the mounting base 11 has a plurality of spring guide holes 21 at the bottom, and the return spring 30 is arranged in the spring guide hole 21. The return spring 30 is a coil spring, which is placed in the guide hole to prevent it from twisting.

[0033] Alternatively, as Figure 3 As shown, the spring guide hole 21 is formed by the inner hole of a circular tubular member 20, the upper end of which is fixedly connected to the base body 11. The lower end wall of the spring guide hole 21 has a retaining ring 22 that limits the release travel of the lower end of the return spring 30. The circular tubular member 20 is fixedly connected to the base body 11 via threads, and the retaining ring 22 prevents the return spring 30 from falling out of the spring guide hole 21.

[0034] Optionally, each lifting platform 40 is provided with a boss 41 that can extend into the spring guide hole 21 and abut the lower end of the return spring 30. The bosses 41 on the lifting platform 40 correspond one-to-one with the spring guide hole 21. The operating handle typically includes four return springs 30, each two forming a pair. When the operating lever 60 is swung, one of the return springs 30 is compressed.

[0035] Optionally, the mounting base 10 further includes a barrel-shaped or cylindrical bottom shell 12, which is fixedly connected to the base body 11 at the upper opening, and the adjustment device is arranged inside the bottom shell 12. The inner wall of the bottom shell 12 is provided with a wire groove 121 and a lead hole 122 for laying the electrical signal harness of the electrical signal connector. The lifting drive device 50 includes a motor 51 connected to the worm 52, and an electrical signal connector 53 connected to the motor 51 and arranged outside the bottom shell 12. The electrical signal connector 53 can be connected to a control switch or a control device for controlling the lifting drive device 50. The lifting drive device 50 can also be manually rotated. For example, the lifting drive device is a rotating rod connected to the worm, and the rotating rod can be rotated by a tool to rotate the worm.

[0036] This embodiment also provides an engineering machine having the aforementioned operating handle.

Claims

1. An operating handle comprising a mounting base, a reset assembly mounted on the mounting base for resetting a deflection member, the reset assembly comprising a plurality of reset springs, characterized in that: The operating handle also includes an adjustment device, which includes: A lifting platform abuts against the lower ends of the return springs; The lifting drive device is arranged below the lifting platform and connected to the lifting platform through a worm gear, and is used to drive the lifting platform to move up and down to compress or release the return spring.

2. The operating handle according to claim 1, characterized in that: The lower portion of the mounting base is provided with a plurality of spring guide holes, and the return springs are arranged in the spring guide holes.

3. The operating handle according to claim 2, characterized in that: The spring guide hole is formed by the inner hole of a round tube member whose upper end is fixedly connected to the base body of the mounting base.

4. The operating handle according to claim 2 or 3, characterized in that: The lower end hole wall of the spring guide hole is provided with a limiting snap ring for limiting the release stroke of the lower end of the return spring.

5. The operating handle according to claim 2 or 3, characterized in that: The lifting platforms are each provided with a boss that can extend into the spring guide hole and abut against the lower end of the return spring, and the bosses on the lifting platforms correspond one to one with the spring guide holes.

6. The operating handle according to claim 1, characterized in that: The mounting base further comprises a barrel-shaped or cylindrical bottom shell, the bottom shell being fixedly connected to the base body of the mounting base at an upper opening, and the adjusting device being arranged in the bottom shell.

7. The operating handle according to claim 6, characterized in that: The lifting drive device includes a motor connected to the worm, and an electric signal connector connected to the motor and arranged outside the bottom shell.

8. The operating handle according to claim 7, characterized in that: The inner wall of the bottom shell is provided with a wire groove and a lead hole for laying the electric signal wire harness of the electric signal connector.

9. The operating handle according to claim 1, characterized in that: A pilot valve or a sensor connected to the deflecting member is arranged in the mounting base.

10. An engineering machine, characterized in that: The invention comprises an operating handle according to any one of claims 1 to 9.

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