Oil buffer device for valve sleeve of automobile steering device

Abstract

The utility model discloses an oil buffer device for a valve sleeve of an automobile steering gear, which belongs to the technical field of automobile accessories and comprises a valve body, an oil inlet is arranged at one end of the valve body, and an oil outlet is fixedly arranged on one side of the surface of the valve body. An oil buffering assembly is arranged on the inner side of the valve body, and an oil pressure adjusting assembly is arranged on the side, away from the oil inlet, of the oil buffering assembly. The oil buffering assembly comprises an inner valve seat arranged on the inner wall of the valve body, a sealing ball abutting against the tail end of the oil inlet through an elastic reset mechanism, a pressure relief cavity formed in the inner valve seat and used for containing the elastic reset mechanism, and an oil discharging hole formed in the inner side of the inner valve seat in the radial direction and communicated with the pressure relief cavity. According to the automobile steering gear valve sleeve oil buffer device, the oil pressure is controlled through the oil pressure adjusting assembly, the elastic reset mechanism can limit the reset path of the sealing ball, and the situation that the sealing ball deviates in the radial direction of the valve body, and consequently the sealing effect is reduced is prevented.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to an oil buffer device for automotive steering gear valve sleeves. Background Technology

[0002] Power steering is a control device that uses the power of the car's engine to achieve easy and quick steering. The energy of the car's engine is converted into hydraulic energy by the steering pump, and then the power steering system converts the hydraulic energy into mechanical energy. This mechanical energy is then transmitted to the tires through a mechanical linkage system, achieving steering. When using a power steering system, it typically requires the use of a valve sleeve. Pressurized oil from the pump is injected into the power steering system through a high-pressure oil pipe, and then passes through the valve body into the steering control valve. This valve releases the hydraulic pressure from the steering system, which is crucial for protecting steering system components and extending their lifespan.

[0003] In the prior art, the automatic stroke unloading valve of the automotive power steering system cannot be adjusted during use, making it inconvenient to control the oil pressure. Furthermore, the sealing ball will shift radially in the valve body when it moves and resets, resulting in a reduced sealing effect. Utility Model Content

[0004] This utility model provides an oil buffer device for automotive steering valve sleeve, aiming to solve the problems mentioned in the background art, such as the inability to adjust the automatic stroke unloading valve of automotive power steering during use, the inconvenience in controlling the oil pressure, and the fact that the sealing ball will shift radially in the valve body when moving and resetting, resulting in a reduction in sealing effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic buffer device for an automotive steering valve sleeve, comprising a valve body, an oil inlet at one end of the valve body, and an oil outlet fixedly disposed on one side of the valve body surface; an oil buffer assembly disposed on the inner side of the valve body, and an oil pressure regulating assembly disposed on the side of the oil buffer assembly away from the oil inlet; the oil buffer assembly comprising an inner valve seat disposed on the inner wall of the valve body, a sealing ball abutting against the end of the oil inlet via an elastic reset mechanism, a pressure relief chamber opened in the inner valve seat for accommodating the elastic reset mechanism, and an oil drain hole radially disposed on the inner side of the inner valve seat and communicating with the pressure relief chamber; the oil pressure regulating assembly comprising a screw threadedly connected to the end of the valve body away from the oil inlet, a push block fixedly connected to one end of the screw, a conical movable block abutting against the outer wall of the push block, and a conical spring having one end sleeved on the outside of the conical movable block and the other end abutting against the surface of the inner valve seat.

[0006] During operation, high-pressure hydraulic fluid enters the valve body through the inlet. This high-pressure fluid forces the sealing ball open from the inlet end, allowing it to enter the valve body. At this point, the elastic reset mechanism is compressed and deformed, allowing the high-pressure fluid to release some pressure and enter the pressure relief chamber. Simultaneously, the fluid from the pressure relief chamber enters the drain hole and is further buffered for pressure relief, thus relieving the hydraulic pressure in the steering system. This protects the steering gear components and extends their lifespan. By rotating the screw, the screw drives the push block to move into the valve body. The push block then drives the conical movable block to compress the conical spring. The conical spring then drives the inner valve seat to move towards the inlet, making the sealing ball more tightly pressed against the inlet. This requires higher hydraulic pressure when external hydraulic fluid enters the valve body, thus controlling the hydraulic pressure. The elastic reset mechanism limits the reset path of the sealing ball, preventing it from shifting radially within the valve body and reducing the sealing effect.

[0007] Preferably, the elastic reset mechanism includes a shaft fixedly connected to the surface of the sealing ball, a plurality of limiting sliders uniformly fixedly installed on the outer wall of the shaft along the circumferential direction, a reset spring sleeved on the outside of the shaft, and a slide groove opened on the inner wall of the front end of the pressure relief chamber and slidably connected to the limiting sliders.

[0008] Preferably, the pressure relief chamber includes a coarse chamber and a fine chamber that are connected to each other, one end of the return spring abuts against the end of the inner wall of the coarse chamber, and the other end abuts against the limiting slider.

[0009] Preferably, the oil drain hole and the oil outlet are located on the same axis.

[0010] Preferably, the conical movable block has a conical groove on the side near the push block, and the conical groove is adapted to the push block.

[0011] Preferably, an annular baffle is integrally connected to the end of the valve body away from the oil inlet.

[0012] This automotive steering valve sleeve hydraulic buffer device has a simple structure and is easy to use. High-pressure hydraulic fluid forces the sealing ball open from the inlet end, allowing it to enter the valve body. At this time, the elastic reset mechanism is compressed and deformed, allowing the high-pressure hydraulic fluid to release some pressure and enter the pressure relief chamber. Simultaneously, the hydraulic fluid enters the drain hole from the pressure relief chamber and is buffered again for pressure relief, thereby relieving the hydraulic pressure of the steering system, protecting the steering components and extending their lifespan. By rotating the screw, the screw drives the push block to move into the valve body. The push block then drives the conical movable block to compress the conical spring. The conical spring then drives the inner valve seat to move towards the inlet, making the sealing ball more tightly abut against the inlet. This requires higher hydraulic pressure when external hydraulic fluid enters the valve body, thus controlling the hydraulic pressure. The elastic reset mechanism can limit the reset path of the sealing ball, preventing it from shifting radially in the valve body and reducing the sealing effect. Attached Figure Description

[0013] Figure 1 A schematic diagram of the front structure of a hydraulic buffer device for a car steering valve sleeve.

[0014] Figure 2 A schematic cross-sectional view of an oil buffer device for a car steering valve sleeve.

[0015] Figure 3 A hydraulic buffer device for automotive steering valve sleeves Figure 2 A magnified schematic diagram of structure A in the diagram.

[0016] In the picture:

[0017] 1. Valve body; 11. Oil inlet; 12. Oil outlet; 13. Annular baffle;

[0018] 2. Oil buffer assembly; 21. Inner valve seat; 22. Sealing ball; 23. Pressure relief chamber; 231. Coarse chamber; 232. Fine chamber; 24. Oil drain hole; 25. Elastic reset mechanism; 251. Shaft; 252. Limiting slider; 253. Return spring; 254. Slide groove;

[0019] 3. Hydraulic pressure regulating assembly; 31. Screw; 32. Push block; 33. Conical movable block; 34. Conical spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This embodiment provides a hydraulic buffer device for automotive steering gear valve sleeves, such as... Figures 1 to 3As shown, the automotive steering valve sleeve hydraulic buffer device includes a valve body 1, with an oil inlet 11 at one end and an oil outlet 12 fixedly disposed on one side of the valve body 1; an hydraulic buffer assembly 2 is disposed inside the valve body 1, and an oil pressure regulating assembly 3 is disposed on the side of the hydraulic buffer assembly 2 away from the oil inlet 11; the hydraulic buffer assembly 2 includes an inner valve seat 21 disposed on the inner wall of the valve body 1, a sealing ball 22 abutting against the end of the oil inlet 11 via an elastic reset mechanism 25, and a valve seat 22 disposed on the inner valve seat 1. The valve seat 21 includes a pressure relief chamber 23 for accommodating the elastic reset mechanism 25, and an oil drain hole 24 radially disposed inside the inner side of the valve seat 21 and connected to the pressure relief chamber 23. The oil pressure regulating assembly 3 includes a screw 31 threaded to one end of the valve body 1 away from the oil inlet 11, a push block 32 fixedly connected to one end of the screw 31, a conical movable block 33 abutting against the outer wall of the push block 32, and a conical spring 34 with one end sleeved on the outside of the conical movable block 33 and the other end abutting against the surface of the inner valve seat 21.

[0022] During operation, high-pressure hydraulic fluid enters the valve body 1 through the inlet 11. The high-pressure fluid forces the sealing ball 22 open from the end of the inlet 11, allowing it to enter the valve body 1. At this time, the elastic reset mechanism 25 is compressed and deformed, allowing the high-pressure fluid to release some pressure and enter the pressure relief chamber 23. Simultaneously, the fluid enters the drain hole 24 from the pressure relief chamber 23 for further buffering and pressure relief, thereby relieving the hydraulic pressure of the steering system, protecting the steering gear components and extending their lifespan. By rotating the screw 31, the screw 31... The push block 32 moves into the valve body 1. The push block 32 then drives the conical movable block 33 to compress the conical spring 34. The conical spring 34 then drives the inner valve seat 21 to move towards the oil inlet 11, so that the sealing ball 22 abuts more tightly with the oil inlet 11. This requires higher hydraulic pressure when external oil enters the valve body 1, thereby controlling the oil pressure. The elastic reset mechanism 25 can limit the reset path of the sealing ball 22 to prevent it from shifting radially in the valve body 1, which would reduce the sealing effect.

[0023] In one embodiment, the elastic reset mechanism 25 includes a shaft 251 fixedly connected to the surface of the sealing ball 22, a plurality of limiting sliders 252 uniformly fixedly installed on the outer wall of the shaft 251 along the circumferential direction, a reset spring 253 sleeved on the outside of the shaft 251, and a slide groove 254 opened on the inner wall of the front end of the pressure relief cavity 23 and slidably connected to the limiting sliders 252.

[0024] In this embodiment, refer to Figure 2 and Figure 3When the sealing ball 22 is reset, under the force of the reset spring 253, it drives the shaft 251 to move towards the oil inlet 11. It moves in the slide groove 254 through the limit slider 252, so that the shaft 251 and the sealing ball 22 maintain stable axial movement and prevent them from deviating.

[0025] In one embodiment, the pressure relief chamber 23 includes a coarse chamber 231 and a fine chamber 232 that are connected to each other. One end of the return spring 253 abuts against the end of the inner wall of the coarse chamber 231, and the other end abuts against the limiting slider 252.

[0026] In this embodiment, refer to Figure 2 By providing a coarse cavity 231 and a fine cavity 232, it is convenient to install the return spring 253 on the stepped surface at the connection between the coarse cavity 231 and the fine cavity 232.

[0027] In one embodiment, the oil drain hole 24 corresponds to the oil outlet 12.

[0028] In this embodiment, refer to Figure 2 By setting the drain hole 24 to correspond to the oil outlet 12, when the oil pressure regulating component 3 adjusts the position of the inner valve seat 21, the drain hole 24 can be aligned with or offset from the oil outlet 12 by a certain distance, thereby regulating the oil pressure discharged from the oil outlet 12.

[0029] In one embodiment, the conical movable block 33 has a conical groove on the side near the push block 32, and the conical groove is adapted to the push block 32.

[0030] In this embodiment, refer to Figure 2 The conical movable block 33 contacts the push block 32 through the conical groove, and the cooperation between the two achieves a stable pushing effect.

[0031] In one embodiment, an annular baffle 13 is integrally connected to the end of the valve body 1 away from the oil inlet 11.

[0032] In this embodiment, refer to Figure 1 The annular baffle 13 provides radial protection for the screw 31, ensuring the safety of the hydraulic pressure regulating assembly 3.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hydraulic buffer device for a steering gear valve sleeve, comprising a valve body (1), wherein an oil inlet (11) is provided at one end of the valve body (1), and an oil outlet (12) is fixedly provided on one side of the surface of the valve body (1). Its features are: An oil buffer assembly (2) is provided on the inner side of the valve body (1), and an oil pressure regulating assembly (3) is provided on the side of the oil buffer assembly (2) away from the oil inlet (11). The oil buffer assembly (2) includes an inner valve seat (21) disposed on the inner wall of the valve body (1), a sealing ball (22) abutting against the end of the oil inlet (11) via an elastic reset mechanism (25), a pressure relief chamber (23) opened in the inner valve seat (21) and used to accommodate the elastic reset mechanism (25), and an oil drain hole (24) radially disposed inside the inner valve seat (21) and connected to the pressure relief chamber (23). The oil pressure regulating assembly (3) includes a screw (31) threaded to one end of the valve body (1) away from the oil inlet (11), a push block (32) fixedly connected to one end of the screw (31), a conical movable block (33) abutting against the outer wall of the push block (32), and a conical spring (34) with one end sleeved on the outside of the conical movable block (33) and the other end abutting against the surface of the inner valve seat (21).

2. The automotive steering gear valve sleeve oil buffer device according to claim 1, characterized in that: The elastic reset mechanism (25) includes a shaft (251) fixedly connected to the surface of the sealing ball (22), a plurality of limiting sliders (252) uniformly fixedly installed on the outer wall of the shaft (251) along the circumferential direction, a reset spring (253) sleeved on the outside of the shaft (251), and a slide groove (254) opened on the inner wall of the front end of the pressure relief chamber (23) and slidably connected to the limiting sliders (252).

3. The automotive steering gear valve sleeve oil buffer device according to claim 2, characterized in that: The pressure relief chamber (23) includes a coarse chamber (231) and a fine chamber (232) that are connected to each other. One end of the reset spring (253) abuts against the end of the inner wall of the coarse chamber (231), and the other end abuts against the limiting slider (252).

4. The automotive steering gear valve sleeve oil buffer device according to claim 1, characterized in that: The oil drain hole (24) and the oil outlet (12) are located on the same axis.

5. The automotive steering gear valve sleeve oil buffer device according to claim 1, characterized in that: The conical movable block (33) has a conical groove on the side near the push block (32), and the conical groove is adapted to the push block (32).

6. The automotive steering gear valve sleeve oil buffer device according to claim 1, characterized in that: An annular baffle (13) is integrally connected to one end of the valve body (1) away from the oil inlet (11).

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