Full-hydraulic steering gear cushion valve

Abstract

The utility model discloses a full-hydraulic steering gear cushion valve, and belongs to the field of fluid control. The pressure regulating valve structurally comprises a valve seat, and further comprises a pressure regulating bolt, a steel ball and a steel ball seat which are connected with the valve seat through a spring, the steel ball is arranged between the valve seat and the steel ball seat, and a conical hole matched with the spherical surface of the steel ball is formed in the contact surface of the valve seat and the steel ball; the steel ball seat is provided with a flow channel in the axial direction, and an inner chamfer is arranged on the contact face of the end of the flow channel and the steel ball. The utility model has the advantages of small overall size, more compact structure and low cost.

Description

Technical Field

[0001] The utility model relates to a full hydraulic steering gear buffer valve, belonging to the field of fluid control. Background Art

[0002] A buffer valve is a device used to control the flow of fluid media, usually used in pipeline systems. Its working principle is to change the flow and pressure of the medium by adjusting the valve. When the medium enters the buffer valve, the valve will open or close according to the set parameters. When the valve is closed, the fluid cannot enter through the valve, and the valve acts as a seal. When the valve is open, the fluid can pass through the valve smoothly and flow out slowly under the action of the valve. The main function of the buffer valve is to adjust the fluid flow and the pressure of the medium.

[0003] Prior art buffer valves, such as Figure 7 As shown, the valve seat has a complex structure, a large volume, occupies a large installation space, and has a high manufacturing cost. Utility Model Content

[0004] The present application solves the problems of large size and large installation space occupied in the prior art by providing a fully hydraulic steering gear buffer valve, and has a more compact structure and reduced processing costs.

[0005] The present application provides a fully hydraulic steering gear buffer valve, including a valve seat, characterized in that it also includes a pressure-adjusting bolt, a steel ball and a steel ball seat connected to the valve seat by a spring; the steel ball is arranged between the valve seat and the steel ball seat, and the contact surface between the valve seat and the steel ball is provided with a tapered hole adapted to the spherical surface of the steel ball; the steel ball seat is provided with a flow channel along the axial direction, and the end of the flow channel and the contact surface between the steel ball are provided with an inner chamfer.

[0006] Preferably, an end of the steel ball seat away from the steel ball is provided with an external thread.

[0007] Preferably, a sealing ring is provided inside the external thread of the steel ball seat.

[0008] Preferably, the pressure regulating bolt has an external thread structure at one end close to the spring, and an annular groove at one end away from the spring, and a sealing ring is sleeved in the annular groove.

[0009] Preferably, the maximum radius of the tapered hole is smaller than the radius of the steel ball.

[0010] The technical solution provided by the present application has at least the following technical effects or advantages: the overall size of the utility model is smaller, the structure is more compact, and the processing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the full hydraulic steering gear buffer valve assembly of the utility model;

[0012] Figure 2 for Figure 1 Schematic diagram of the structure after removing the spring;

[0013] Figure 3 This is a schematic diagram of a pressure regulating bolt of the utility model;

[0014] Figure 4 It is a schematic diagram of the valve seat of the utility model;

[0015] Figure 5 It is a schematic diagram of a steel ball seat of the utility model;

[0016] Figure 6 This is an assembly diagram of the full hydraulic steering gear buffer valve of the utility model;

[0017] Figure 7 This is a schematic diagram of the valve seat of the full hydraulic steering gear buffer valve of the original technology;

[0018] In the figure, 1: pressure regulating bolt, 1-1: tapered hole, 2: spring, 3: valve seat, 3-1: external thread structure, 4: steel ball, 5-1: first sealing ring, 5-2: second sealing ring, 6: steel ball seat, 6-1: flow channel, 6-2: inner chamfer, 6-3: external thread; 7: main flow channel; 8: valve body. DETAILED DESCRIPTION

[0019] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example

[0020] This embodiment provides a full hydraulic steering gear buffer valve, such as Figure 1-Figure 6 As shown: it includes a valve seat 1, a pressure regulating bolt 3 connected to the valve seat 1 through a spring 2, a steel ball 4 and a steel ball seat 6; the steel ball 4 is arranged between the valve seat 1 and the steel ball seat 6, and the contact surface between the valve seat 1 and the steel ball 4 is provided with a tapered hole 1-1 adapted to the spherical surface of the steel ball 4; the steel ball seat 6 is axially provided with a flow channel 6-1, and the contact surface between the end of the flow channel and the steel ball 4 is provided with an inner chamfer 6-2.

[0021] Specifically, an end of the steel ball seat 6 in this embodiment away from the steel ball 4 is provided with an external thread 6 - 3 for connecting and fixing with the valve body 8 .

[0022] Specifically, a first sealing ring 5 - 1 is sleeved on the inner side of the external thread 6 - 3 of the steel ball seat 6 in this embodiment.

[0023] Specifically, the opening angle of the tapered hole 1 - 1 in this embodiment is 90°.

[0024] Specifically, in this embodiment, an external thread structure 3-1 is provided at the end of the pressure-adjusting bolt 3 close to the spring 2, an annular groove is provided at the end away from the spring 2, a second sealing ring 5-2 is sleeved in the annular groove, and an internal thread hole is provided at the end of the pressure-adjusting bolt away from the spring to facilitate the disassembly and assembly of the pressure-adjusting bolt.

[0025] The installation method of the utility model is: the steel ball seat 6 is installed into the main flow channel 7 on the valve body 8 by using the external thread, and the steel ball 4, valve seat 1, spring 2 are installed in sequence, and then the pressure regulating bolt 1 is installed and tightened with the valve body. At this time, the steel ball is stuck between the inner chamfer 6-2 and the tapered hole 1-1. When the oil pressure through the flow channel reaches the set pressure of the buffer valve, the steel ball is pushed to move to the right, the buffer valve opens, and the spring is compressed to play a buffering role. When the oil pressure through the flow channel is less than the set pressure of the buffer valve, the spring rebounds, pushing the steel ball to the left, blocking the outlet of the flow channel.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A fully hydraulic steering gear buffer valve, comprising a valve seat (1), characterized in that: It also includes a pressure regulating bolt (3) connected to the valve seat (1) via a spring (2), a steel ball (4) and a steel ball seat (6); the steel ball (4) is arranged between the valve seat (1) and the steel ball seat (6); the contact surface between the valve seat (1) and the steel ball (4) is provided with a tapered hole (1-1) adapted to the spherical surface of the steel ball (4); the steel ball seat (6) is provided with a flow channel (6-1) along the axial direction, and the contact surface between the end of the flow channel and the steel ball (4) is provided with an inner chamfer (6-2).

2. The fully hydraulic steering gear buffer valve according to claim 1, characterized in that: An end of the steel ball seat (6) away from the steel ball (4) is provided with an external thread (6-3).

3. The full hydraulic steering gear buffer valve according to claim 2, characterized in that: A first sealing ring (5-1) is sleeved on the inner side of the external thread (6-3) of the steel ball seat.

4. The full hydraulic steering gear buffer valve according to claim 1, characterized in that: The pressure regulating bolt (3) is provided with an external thread structure (3-1) at one end close to the spring, and is provided with an annular groove at one end away from the spring, wherein a second sealing ring (5-2) is sleeved in the annular groove.

5. The fully hydraulic steering gear buffer valve according to claim 1, characterized in that: The maximum radius of the tapered hole (1-1) is smaller than the radius of the steel ball.

Images