Valve element sleeve with pressure equalizing function

Abstract

The utility model belongs to the technical field of hydraulic transmission parts, and provides a valve core sleeve with a pressure equalizing function, which comprises a valve core with one end for transmission input and the other end for transmission output, and a valve sleeve sleeved outside the valve core, the valve element is provided with a plurality of flow channels distributed at intervals in the axial direction, crescent grooves are formed in the positions, close to the ends, of the flow channels, and the crescent grooves are matched with switching holes in the valve sleeve. The side, close to the output end, of the valve element is provided with a plurality of U-shaped grooves in the circumferential direction, and the U-shaped grooves are matched with transition penetrating holes in the corresponding positions of the valve sleeve. The crescent groove is arranged on the valve core, so that the oil passing area is enlarged, the steering pressure of wheels can be quickly and effectively fed back to a steering wheel, and the response of the steering wheel is more sensitive. The U-shaped groove is formed in the portion, close to the output end, of the valve element, the pressure on the valve sleeve is evenly dispersed to the valve element, the valve element sleeve rotates more flexibly, and stress is more even.

Description

Technical Field

[0001] The utility model relates to a valve core sleeve, in particular to a valve core sleeve with a pressure equalizing function, and belongs to the technical field of hydraulic transmission parts. Background Art

[0002] The valve core sleeve is composed of a valve core and a valve sleeve outside it. It is the core component of the full hydraulic steering gear (its typical structure can be found in the Chinese patent document with application number 201110195256.9 and the name "Full Hydraulic Steering Gear"). Its function is to switch the oil circuit as needed to achieve the required steering control. The driver turns the steering wheel to move the valve core in the valve core sleeve, thereby changing the hydraulic flow direction, allowing the hydraulic oil to enter the hydraulic cylinder to generate pressure, pushing the steering gear, and thus assisting the steering.

[0003] However, the inventors of the present application have discovered that the existing valve core and valve sleeve structure has at least the following technical problems: the oil flow area between the valve core and valve sleeve currently on the market is small, the power assist provided by the hydraulic power steering system is small, and the steering pressure of the wheel cannot be quickly fed back to the steering wheel, causing the valve core sleeve to become stuck and the pressure to be uneven, making it difficult for the driver to operate the vehicle when steering at low speed or when the vehicle is parked, which is very likely to cause the driver to make operational errors and lead to adverse consequences. Utility Model Content

[0004] The present application solves the problems of valve core sleeve getting stuck and uneven pressure in the prior art by providing a valve core sleeve with a pressure equalization function, thereby achieving more sensitive and easy steering wheel control.

[0005] The present application provides a valve core sleeve with a pressure equalizing function, comprising a valve core with a transmission input at one end and a transmission output at the other end, and a valve sleeve sleeved outside the valve core; characterized in that the valve core has a plurality of flow channels distributed axially at intervals, and a crescent groove is provided at a position near the end of the flow channel, and the crescent groove cooperates with the switching hole on the valve sleeve; a plurality of U-shaped grooves are provided along the circumferential direction on one side of the valve core close to the output end, which cooperate with the transition perforations at the corresponding positions of the valve sleeve.

[0006] Preferably, one crescent groove is provided on both sides of the end of the flow channel, and the crescent grooves on both sides are symmetrically arranged.

[0007] Preferably, there are 6 groups of crescent grooves, which are evenly distributed on the flow channel of the valve core along the circumferential direction.

[0008] Preferably, there are 12 switching holes in total, which are evenly distributed on the valve sleeve along the circumferential direction.

[0009] Preferably, the radius of the switching hole is greater than the radius of the arcs on both sides of the crescent groove.

[0010] Preferably, there are 6 U-shaped grooves in total, which are evenly distributed on the valve core along the circumferential direction.

[0011] Preferably, there are 12 transition perforations in total, which are evenly distributed on the valve sleeve along the circumferential direction.

[0012] The technical solution provided by this application has at least the following technical effects or advantages:

[0013] 1. The utility model is provided with a crescent groove on the valve core, which expands the oil flow area and can quickly and effectively feed back the wheel steering pressure to the steering wheel, making the steering wheel more responsive.

[0014] 2. The utility model provides a U-shaped groove near the output end of the valve core to evenly distribute the pressure on the valve sleeve to the valve core, so that the valve core sleeve can rotate more flexibly and the force can be more evenly applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the valve core in Example 1 of the utility model;

[0016] Figure 2 This is a front view of the valve core in Example 1 of the utility model;

[0017] Figure 3 This is a three-dimensional schematic diagram of a valve sleeve matched with a valve core in Embodiment 1 of the utility model;

[0018] Figure 4 This is a front view of a valve sleeve matched with a valve core in Example 1 of the utility model;

[0019] Figure 5 It is a schematic diagram of the oil passing area in the prior art (the shaded part);

[0020] Figure 6 This is a schematic diagram of the oil passing area of ​​the utility model (the shaded part);

[0021] Figure 7 It is a schematic diagram of the oil passing area through the U-shaped groove of the utility model (the shaded part).

[0022] Among them: 1, valve sleeve, 1-1, switching hole, 1-2, transition through hole 2, valve core, 2-1, crescent groove, 2-2, U-shaped groove. DETAILED DESCRIPTION

[0023] 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

[0024] like Figure 1-Figure 5As shown, this embodiment provides a valve core sleeve with a pressure equalization function, including a valve core 2 with a transmission input at one end and a transmission output at the other end, and a valve sleeve 1 sleeved outside the valve core; the valve core has a plurality of flow channels 2-3 distributed axially at intervals, and a crescent groove 2-2 is provided at a position near the end of the flow channel, and the crescent groove 2-2 cooperates with a switching hole 1-1 on the valve sleeve;

[0025] Six U-shaped grooves 2-1 are arranged along the circumferential direction on one side of the valve core close to the output end, which match the transition holes 1-2 at the corresponding positions of the valve sleeve.

[0026] Specifically, in this embodiment, a crescent groove 2-2 is provided on both sides of the end of the flow channel 2-3, and the crescent grooves on both sides are symmetrically arranged, which further improves the oil discharge efficiency.

[0027] Specifically, in this embodiment, there are 6 groups of crescent grooves 2-2, which are evenly distributed on the flow channel of the valve core along the circumferential direction.

[0028] Specifically, there are 12 switching holes 1-1 in this embodiment, which are evenly distributed on the valve sleeve along the circumferential direction. More specifically, the radius of the switching hole 1-1 is greater than the radius of the arcs on both sides of the crescent groove.

[0029] Specifically, in this embodiment, there are 12 transition through holes 1-2 in total, which are evenly distributed on the valve sleeve along the circumferential direction.

[0030] like Figure 5-Figure 6 As shown: Compared with the prior art ( Figure 5 Compared with the utility model shown in the figure, the oil flow area of ​​the flow channel with the moon pressure groove is increased, which can effectively feed back the wheel steering pressure to the steering wheel, and the response is more sensitive.

[0031] like Figure 7 As shown: the U-shaped groove design added in this embodiment enables the valve core close to the output end to cooperate with the third row of transition perforations at the output end of the valve sleeve, thereby evenly distributing the pressure on the valve sleeve to the valve core, making the valve core sleeve rotate flexibly and receiving more uniform force.

[0032] 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 valve core sleeve with a pressure equalization function, comprising a valve core (2) with a transmission input at one end and a transmission output at the other end, and a valve sleeve (1) sleeved outside the valve core; characterized in that: The valve core has a plurality of flow channels (2-3) distributed axially at intervals, a crescent groove (2-2) is provided at a position close to the end of the flow channel, and the crescent groove (2-2) cooperates with the switching hole (1-1) on the valve sleeve; A plurality of U-shaped grooves (2-1) are provided along the circumferential direction on one side of the valve core close to the output end, and are matched with transition holes (1-2) at corresponding positions of the valve sleeve.

2. The valve core sleeve with pressure equalization function according to claim 1, characterized in that: A crescent groove (2-2) is provided on both sides of the end of the flow channel (2-3), and the crescent grooves on both sides are symmetrically arranged.

3. The valve core sleeve with pressure equalization function according to claim 2, characterized in that: There are 6 groups of crescent grooves (2-2) in total, which are evenly distributed on the flow channel of the valve core along the circumferential direction.

4. The valve core sleeve with pressure equalization function according to claim 1, characterized in that: There are 12 switching holes (1-1) in total, which are evenly distributed on the valve sleeve along the circumferential direction.

5. The valve core sleeve with pressure equalization function according to claim 4, characterized in that: The radius of the switching hole (1-1) is greater than the radius of the arcs on both sides of the crescent groove.

6. The valve core sleeve with pressure equalization function according to claim 1, characterized in that: There are 6 U-shaped grooves (2-1) in total, which are evenly distributed on the valve core along the circumferential direction.

7. The valve core sleeve with pressure equalization function according to claim 1, characterized in that: There are 12 transition perforations (1-2) in total, which are evenly distributed on the valve sleeve along the circumferential direction.

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