CN217969648U

CN217969648U - Hydraulic steering system and steering valve core thereof

Info

Publication number: CN217969648U
Application number: CN202221917563.3U
Authority: CN
Inventors: 邓钟培; 刘海强
Original assignee: Guangdong Dimension Automotive Parts Co ltd
Current assignee: Guangdong Dimension Automotive Parts Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-12-06
Anticipated expiration: 2032-07-21

Abstract

The utility model relates to the technical field of automobile manufacturing, and discloses a steering valve core of a hydraulic steering system, which comprises a valve core body, wherein the upper end of the valve core body is used for being connected with a steering wheel, the lower end of the valve core body is used for being connected with a torsion bar, and a containing cavity is arranged in the valve core body; first oil return holes are formed in the side face of the valve core body at equal intervals and communicated with the accommodating cavity; a hydraulic control part is arranged below the first oil return hole along the side surface of the valve core body, and the radius of the hydraulic control part is larger than that of the valve core body; the hydraulic control part is provided with oil return grooves with the same number as the first oil return holes at equal intervals, and oil inlet grooves are formed at intervals of the oil return grooves; the bottom of oil gallery all is equipped with the second oil gallery, the second oil gallery with hold the chamber intercommunication, the upper end of oil gallery be equipped with the breach of first oil return hole intercommunication the utility model also discloses a hydraulic steering system. The utility model discloses the oil return is efficient, and turns to smoothly.

Description

Hydraulic steering system and steering valve core thereof

Technical Field

The utility model relates to an automobile manufacturing technical field especially relates to a hydraulic steering system and steering valve core thereof.

Background

The steering gear is a mechanism for maintaining or changing the driving direction of the automobile, wherein the rotary valve of the recirculating ball steering gear generally comprises a steering screw, a valve core, a valve sleeve, a torsion bar and the like. The hydraulic steering system controls the flow direction of hydraulic oil by a valve core of a steering gear, and the steering of the automobile changes the flow direction of the hydraulic oil by rotating the valve core to generate hydraulic pressure difference so as to change the steering of the automobile. Therefore, the hydraulic flow speed of the steering valve core determines one of important factors for smooth steering of the automobile, but the oil return section of the existing steering valve core is fixed, so that the oil return rate of the steering valve core cannot be effectively increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, the embodiment of the utility model provides a hydraulic steering system's steering valve core, its low in manufacturing cost to hydraulic pressure oil return is fast.

An embodiment of the utility model provides a still provide a hydraulic steering system, it turns to efficiently to it is smooth and easy to turn to the process.

In order to solve the problems, the utility model provides a steering valve core of a hydraulic steering system, which comprises a valve core body, wherein the upper end of the valve core body is used for being connected with a steering wheel, the lower end of the valve core body is used for being connected with a torsion bar, and an accommodating cavity is arranged in the valve core body;

first oil return holes are formed in the side face of the valve core body at equal intervals and communicated with the accommodating cavity; a hydraulic control part is arranged below the first oil return hole along the side surface of the valve core body, and the radius of the hydraulic control part is larger than that of the valve core body; the hydraulic control part is provided with oil return grooves with the same number as the first oil return holes at equal intervals, and oil inlet grooves are formed at intervals of the oil return grooves; and the bottom of the oil return groove is provided with a second oil return hole, the second oil return hole is communicated with the accommodating cavity, and the upper end of the oil return groove is provided with a notch communicated with the first oil return hole.

As an improvement of the technical scheme, the distances between the oil return groove and the oil inlet groove are equal, and the first oil return hole and the intervals between the oil return groove and the oil inlet groove are in the same straight line.

As the improvement of the technical scheme, the width of the oil return groove is consistent with that of the oil inlet groove.

As an improvement of the technical scheme, the bottoms of the oil return groove and the oil inlet groove are arc-shaped curved surfaces.

As an improvement of the technical scheme, the upper end of the bottom of the oil return groove penetrates through the notch and extends to the side of the first oil return hole.

As an improvement of the technical scheme, the second oil return hole is formed in the middle of the oil return groove.

As an improvement of the technical scheme, the diameter of the second oil return hole is 50% -70% of that of the first oil return hole.

As the improvement of the technical scheme, a sealing ring groove is arranged above the first oil return hole.

As an improvement of the technical scheme, the left side and the right side of the lower end of the valve core body are arranged on positioning pin surfaces connected with the torsion bar, connecting holes are formed in the centers of the positioning pin surfaces, and the axial direction of the connecting holes is consistent with that of the first oil return.

Correspondingly, the embodiment of the utility model provides a hydraulic steering system is still provided, including the aforesaid steering valve core.

Implement the utility model discloses beneficial effect:

the utility model discloses hydraulic control portion includes oil gallery and oil feed tank, compares in its oil gallery's of prior art upper end be equipped with the breach of first time oilhole intercommunication. When hydraulic oil returns, two oil return routes exist; the first one is from the second oil return hole on the oil return groove flow into and hold the chamber, and then flow to the first oil return hole by holding the chamber, and the second one is from the breach on the oil return groove direct flow to first oil return hole department. The utility model discloses increased the route that hydraulic oil has flowed back, increased the oil return cross-section of hydraulic oil, and then improved hydraulic steering system's the efficiency that turns to, more smooth and easy when making its operation.

Drawings

FIG. 1 is a perspective view of a steering valve cartridge according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a steering valve cartridge in accordance with an embodiment of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, an embodiment of the present invention provides a steering valve core of a hydraulic steering system, including a valve core body 1, an upper end of the valve core body 1 is used for being connected with a steering wheel, a lower end of the valve core body 1 is used for being connected with a torsion bar, and a containing cavity 11 is arranged in the valve core body 1.

The utility model discloses implement through improving the oil return groove structure on the hydraulic control portion to the steering case, oil return route when increasing the oil return and then increase the oil return cross-section of hydraulic oil to improve the oil return efficiency of steering case.

Specifically, first oil return holes 12 are arranged along the side surface of the valve core body 1 at equal intervals, and the first oil return holes 12 are communicated with the accommodating cavity 11; a hydraulic control part 2 is arranged below the first oil return hole 12 along the side surface of the valve core body 1, and the radius of the hydraulic control part 2 is larger than that of the valve core body 1; the hydraulic control part 2 is provided with oil return grooves 21 with the same number as the first oil return holes 12 at equal intervals, and oil inlet grooves 22 are arranged at the intervals of the oil return grooves 21; the bottom of the oil return groove 21 is provided with a second oil return hole 23, the second oil return hole 23 is communicated with the accommodating cavity 11, and the upper end of the oil return groove 21 is provided with a notch 24 communicated with the first oil return hole 12.

The embodiment of the utility model provides a main improvement point, on its hydraulic control portion 2. The upper end of the oil return groove 21 on the hydraulic control part 2 is provided with a notch 24 communicated with the first oil return hole 12. When the steering valve core 1 rotates to an oil return state, two hydraulic oil return routes exist; the first one is that the oil flows into the accommodating cavity 11 from the second oil return hole 23 on the oil return groove 21 and then flows to the first oil return hole 12 from the accommodating cavity 11, and the second one is that the oil flows directly to the first oil return hole 12 from the notch 24 on the oil return groove 21. The utility model discloses an increase the mode of hydraulic oil return route, improve the hydraulic oil backward flow speed of steering valve core. The faster the hydraulic oil return speed of the steering valve core is, the shorter the time for the automobile to finish steering is, and the smoother the steering operation process is.

Further, the intervals between the oil return groove 21 and the oil inlet groove 22 are equal, and the intervals between the first oil return hole 12 and the oil return groove 21 and the oil inlet groove 22 are in the same straight line. In the present embodiment, the first oil return hole 12 is limited to the interval between the oil return groove 21 and the oil inlet groove 22, so as to ensure that the oil leakage rate between the oil return groove 21 and the first oil return hole 12 meets the standard requirement when the steering valve body 1 is mounted in the valve housing and travels straight.

Preferably, the width of the oil returning groove 21 is the same as that of the oil inlet groove 22. In the present embodiment, the oil return grooves 21 and the oil inlet grooves 22 have the same width, so as to ensure that the oil inlet speed and the oil return speed are the same, and ensure that the vehicle is kept stable when turning.

Further, referring to fig. 2, the bottoms of the oil returning groove 21 and the oil inlet groove 22 are curved in an arc shape. The curved surface can make the hydraulic oil flow more smoothly in the oil inlet groove 22 and the oil return groove 21.

Preferably, the upper end of the bottom of the oil return groove 21 extends to the first oil return hole 12 side through the notch 24. When the hydraulic oil needs to flow back, the hydraulic oil can smoothly flow from the notch 24 to the first oil return hole 12. Preferably, the second oil return hole 23 is formed in the middle of the oil return groove 21.

Further, the diameter of the second oil return hole 23 is 50% to 70% of the diameter of the first oil return hole 12. Exemplary are, but not limited to, 52%, 60%, 68%, 70%.

Further, a seal ring groove 13 is provided above the first oil return hole 12. The sealing ring groove 13 is used for preventing hydraulic oil from leaking to the outside of the valve sleeve from the first oil return hole 12 when the steering valve core 1 works.

Furthermore, the left side and the right side of the lower end of the valve core body 1 are arranged on a positioning pin surface 3 connected with the torsion bar, the centers of the positioning pin surfaces 3 are respectively provided with a connecting hole 31, and the axial direction of the connecting holes 31 is consistent with that of the first return oil 12.

Correspondingly, the embodiment of the utility model provides a hydraulic steering system is still provided, including the aforesaid steering valve core 1.

The embodiment of the utility model provides a hydraulic steering system, because its return cross-section that turns to case 1 is big, return speed is faster when making it turn to, and then promotes the smoothness nature when hydraulic steering system turns to.

Claims

1. The steering valve core of the hydraulic steering system is characterized by comprising a valve core body, wherein the upper end of the valve core body is used for being connected with a steering wheel, the lower end of the valve core body is used for being connected with a torsion bar, and an accommodating cavity is arranged in the valve core body;

2. The steering valve core according to claim 1, wherein the oil return grooves and the oil inlet grooves are equally spaced, and the first oil return hole is in the same straight line as the intervals between the oil return grooves and the oil inlet grooves.

3. The steering valve cartridge according to claim 2, wherein the width of the oil return groove is identical to the width of the oil feed groove.

4. The steering valve core according to claim 1, wherein the bottoms of the oil return groove and the oil inlet groove are curved surfaces.

5. The steering valve cartridge according to claim 4, wherein the upper end of the bottom of the oil return groove extends to the first oil return hole side through the notch.

6. The steering valve spool according to claim 4 wherein the second oil return hole is provided in the middle of the oil return groove.

7. The steering valve spool according to claim 1, wherein the second oil return hole has a diameter of 50% to 70% of the first oil return hole.

8. The steering valve core according to claim 1, wherein a seal ring groove is provided above the first oil return hole.

9. The steering valve body according to claim 1, wherein left and right sides of the lower end of the valve body are provided with positioning pin faces connected with the torsion bar, and a connecting hole is formed in each of centers of the positioning pin faces, and an axial direction of the connecting hole is in accordance with the first return oil.

10. A hydraulic steering system comprising a steering valve cartridge according to any one of claims 1 to 9.