CN217270791U - Safety valve of steering pump - Google Patents

Abstract

The utility model provides a relief valve of steering pump belongs to car technical field. It has solved the problem that mixes impurity in current a steering system's fluid. This relief valve of steering pump, including being cylindrical valve body, the valve body has the axial hole, and the valve body lateral part runs through and has seted up the side opening, is provided with reset spring, guide bracket in the axial hole and is globular ball core, has the protrusion on the lateral wall of axial hole and is annular fender shoulder, and the axial hole still has convex shoulder on being close to the lateral wall of opening part, still is provided with at least three annular buffer ring that is in the axial hole, the buffer ring adopts rubber materials to make, all is provided with the filter screen between two adjacent buffer ring, every the outer edge of filter screen all corresponds and inserts between two adjacent buffer ring, the opening part of axial hole still threaded connection has the annular clamp ring that is, the clamp ring sticiss several buffer ring and filter screen on above-mentioned convex shoulder. This steering pump's relief valve can effectively filtering impurity.

Description

Safety valve of steering pump

Technical Field

The utility model belongs to the technical field of the car, a relief valve of steering pump is related to.

Background

In order to enable a driver to conveniently and flexibly operate a steering wheel, reduce the fatigue strength of the driver and improve the driving safety, a hydraulic steering system is adopted for a steering system of a commercial vehicle and a passenger vehicle to replace an original mechanical steering system, and a power steering oil pump is equipment for providing a hydraulic power source for the steering system of the vehicle by means of the driving of an engine of the vehicle.

When the steering engine normally drives in a direction, working pressure is generated in a steering system, the working pressure comes from steering resistance moment, the flow of the power steering oil pump flows to an oil outlet through an oil delivery port and then flows through an oil cylinder of the steering engine to push a piston to move. In actual operation, the idling steering direction is easy to reach a limit value, when a steering wheel reaches a left limit value and a right limit value, an oil outlet hole of a valve core assembly communicated with a steering engine piston is sealed, the pressure of a steering system tends to be infinite until parts are damaged, and therefore, in order to avoid pressure overload of a hydraulic power steering system, a safety pressure valve is arranged and used for relieving pressure when the pressure of the steering system is too large.

However, the oil used in the steering system cannot completely prevent the impurities from being mixed, and the impurities are doped in the oil, which may cause great influence on the safety valve and the operation of the whole steering system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a relief valve of steering pump, solved the problem of mixing impurity in current a steering system's the fluid.

The purpose of the utility model can be realized by the following technical proposal:

the safety valve of the steering pump comprises a shell, a mandrel, an oil distribution disc and a pump core, wherein the mandrel is partially arranged in the shell in a penetrating manner, the oil distribution disc and the pump core are arranged in the shell, the safety valve comprises a safety valve component arranged between an oil outlet and an oil inlet of the shell, the safety valve component comprises a columnar valve body, an axial hole which is recessed along the axial direction is formed in one end face of the valve body, a side hole which is used for communicating the axial hole to the outer side of the valve body is formed in the side portion of the valve body in a penetrating manner, a reset spring, a guide support and a spherical ball core are sequentially arranged in the axial hole from inside to outside, a protruding annular retaining shoulder is arranged on the side wall of the axial hole, and the guide support can push the ball core to abut against the retaining shoulder and block the axial hole under the elastic action of the reset spring The utility model discloses a filter screen, including the filter screen, the buffer ring adopts rubber materials to make, all is provided with the filter screen between two adjacent buffer rings, every the outer edge of filter screen all corresponds and inserts between two adjacent buffer rings, the opening part of axial hole still threaded connection has and is the annular clamp ring of circle, the clamp ring sticiss several buffer ring and filter screen on above-mentioned convex shoulder.

When the safety valve of the steering pump works, the oil pressure at the opening of the axial hole rises, the oil pressure acts on the ball core and the guide support, the ball core and the guide support compress the return spring to move and leave the retaining shoulder, the axial hole is opened, and oil can be discharged outwards through the axial hole and the side hole. In the working process, the oil is filtered by at least two layers of filter screens, so that impurities in the oil can be effectively filtered, and the influence of the impurities on the normal work of the safety valve is avoided. Here, the clamp ring of the buffer ring made of rubber material and matched with the threaded connection clamps the filter screen, so that the installation is fixed and more convenient, the buffer ring can deform and drive the filter screen to move in a small range when oil impacts on the filter screen, the impact force is reduced, the buffer effect is achieved, the service life of the filter screen is prolonged, and the filter screen is blocked or damaged, the clamp ring can be detached to be cleaned or replaced, and the service life and the use safety of the safety valve are further guaranteed.

In the safety valve of the steering pump, the edges of the plurality of filter screens are flat and are perpendicular to the axis of the valve body, and the middle parts of the plurality of filter screens protrude towards the opening direction of the axial hole to form an arc shape. The filter screen middle part is outstanding, and at the in-process that fluid strikes, impurity deposits the border position at the filter screen easily, is difficult for stifled whole filter screen totally, improves the life of filter screen.

In the safety valve of the steering pump, the apertures of the filter holes of the plurality of filter screens are gradually reduced from the opening to the shoulder. The filter screen of multilayer filtration pore size difference carries out the layering and filters, and the filter effect is better, and is difficult for stifled die.

In the safety valve of the steering pump, two opposite inner walls of the hold-down ring each have a tool opening which is recessed and into which a tool can be inserted. The annular clamp ring ensures the flow area, and the tool opening is provided for clamping two sides of a tool and driving the clamp ring to rotate, so that the disassembly and the assembly are realized, and the use is more convenient.

In the safety valve of the steering pump, the cross sections of the buffer rings are circular. The circular buffer ring is easier to deform when the compression ring is extruded, and the compression effect is better.

Compared with the prior art, this relief valve that turns to pump comes to press from both sides tightly the filter screen through the clamp ring of the cooperation threaded connection of buffering ring that rubber materials made, it is not only fixed more convenient to install, and the buffer ring can take place deformation and drive the filter screen and take place small amplitude and remove when fluid strikes on the filter screen, reduce the impact force, play the cushioning effect, the life of extension filter screen, and filter screen department is stifled die or damaged back, detachable clamp ring washs or changes, the life and the safety in utilization of further guarantee relief valve

Drawings

Fig. 1 is a schematic sectional view of a relief valve of the present steering pump.

In the figure, 1, a housing; 2. an oil outlet; 3. a valve body; 4. an axial bore; 5. a side hole; 6. a return spring; 7. a guide bracket; 8. a ball core; 9. a shoulder block; 10. a shoulder is formed; 11. a buffer ring; 12. a filter screen; 13. and (4) a compression ring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The steering pump comprises a shell 1, a mandrel, an oil distribution disc and a pump core, wherein the mandrel is partially arranged in the shell 1 in a penetrating mode, and the oil distribution disc and the pump core are arranged in the shell 1.

As shown in figure 1, the safety valve of the steering pump comprises a safety cavity and a safety valve assembly, wherein the safety cavity is positioned between an oil outlet 2 and an oil inlet in a shell 1, the safety valve assembly is arranged in the safety cavity, and a pressure relief hole communicated to the oil inlet is formed in the side portion of the safety cavity.

The relief valve subassembly is including being cylindrical valve body 3, the one end terminal surface that oil-out 2 was kept away from to valve body 3 has along the recessed axial hole 4 of axial, 3 lateral parts of valve body run through and set up the side opening 5 that communicates axial hole 4 to valve body 3 outside pressure release hole, reset spring 6 has set gradually from inside to outside in the axial hole 4, guide holder 7 and be globular ball core 8, it is the annular fender shoulder 9 of circle to have the protrusion on the lateral wall of axial hole 4, guide holder 7 can promote ball core 8 and support and lean on and block on keeping off shoulder 9 under reset spring 6's spring action axial hole 4.

The side wall of the axial hole 4 close to the opening is provided with a convex annular convex shoulder 10, the axial hole 4 of the convex shoulder 10 close to one side of the opening is also internally provided with at least three buffer rings 11 which are annular in shape coaxially, a filter screen 12 is arranged between every two adjacent buffer rings 11, the outer edge of each filter screen 12 is correspondingly inserted between every two adjacent buffer rings 11, the opening of the axial hole 4 is also connected with a pressing ring 13 which is annular in shape through threads, and the pressing ring 13 tightly presses the plurality of buffer rings 11 and the filter screens 12 on the convex shoulder 10. In the present embodiment, the cross section of the cushion ring 11 is circular, and the cushion ring 11 is made of rubber material; the edges of the plurality of filter screens 12 are flat and are perpendicular to the axis of the valve body 3, the middle parts of the plurality of filter screens 12 protrude towards the opening direction of the axial hole 4 to form an arc shape, and the aperture of the filter holes of the plurality of filter screens 12 is gradually reduced from the opening to the direction of the convex shoulder 10; the opposite inner walls of clamp ring 13 each have a recessed tool aperture into which a tool can be inserted.

When the safety valve of the steering pump works, the oil outlet 2 is closed, the oil pressure is high, and oil is conveyed from the oil outlet 2 to the other side, namely the opening of the axial hole 4, of the safety cavity relative to the oil outlet 2 through a pressure relief channel consisting of three sub-holes.

The oil pressure at the opening of the axial hole 4 rises, the oil pressure acts on the ball core 8 and the guide support 7, the ball core and the guide support are compressed by the return spring 6 to move and leave the retaining shoulder 9, the axial hole 4 is opened, and the oil can be discharged outwards through the axial hole 4 and the side hole 5 and flows back to the oil inlet through the pressure relief hole.

In the working process, the oil is filtered by at least two layers of filter screens 12, so that impurities in the oil can be effectively filtered, and the influence of the impurities on the normal work of the safety valve is avoided. Here, 11 cooperation threaded connection's clamp rings 13 of buffer ring made through rubber materials come to press from both sides tightly filter screen 12, it is not only fixed more convenient to install, and buffer ring 11 can take place to deform and drive filter screen 12 to take place the small amplitude removal when fluid strikes on filter screen 12, reduce the impact force, play the cushioning effect, the life of extension filter screen 12, and filter screen 12 department is stifled die or damaged back, detachable clamp ring 13 washs or changes, further guarantee the life and the safety in utilization of relief valve.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (5)

1. The safety valve of the steering pump comprises a shell (1), a mandrel, an oil distribution disc and a pump core, wherein the mandrel is partially arranged in the shell (1) in a penetrating mode, the oil distribution disc and the pump core are arranged in the shell (1), the safety valve comprises a safety valve assembly arranged between an oil outlet (2) and an oil inlet of the shell (1), the safety valve assembly comprises a cylindrical valve body (3), an axial hole (4) recessed along the axial direction is formed in one end face of the valve body (3), a side hole (5) for communicating the axial hole (4) to the outer side of the valve body (3) is formed in the side portion of the valve body (3) in a penetrating mode, a reset spring (6), a guide support (7) and a spherical ball core (8) are sequentially arranged in the axial hole (4) from inside to outside, a protruding annular retaining shoulder (9) is formed in the side wall of the axial hole (4), and the guide support (7) can push the ball core (8) to abut against the retaining shoulder (9) and block the axial hole (9) under the elastic action of the reset spring (6) (4) The novel filter is characterized in that the axial hole (4) is close to and still has the protrusion on the lateral wall of opening part and is annular convex shoulder (10), convex shoulder (10) are close to and still are provided with at least three annular buffer ring (11) that are ring shape in axial hole (4) of opening one side with the coaxial line, buffer ring (11) adopt rubber materials to make, all are provided with filter screen (12) between two adjacent buffer ring (11), every outer edge of filter screen (12) all corresponds and inserts between two adjacent buffer ring (11), the opening part of axial hole (4) is threaded connection still and is annular clamp ring (13) of being, clamp ring (13) sticiss several buffer ring (11) and filter screen (12) on above-mentioned convex shoulder (10).

2. The safety valve of a steering pump according to claim 1, wherein the edges of the plurality of filter screens (12) are flat and perpendicular to the axis of the valve body (3), and the middle portions of the plurality of filter screens (12) protrude in an arc shape toward the opening of the axial hole (4).

3. A safety valve for a steering pump according to claim 1 or 2, wherein the apertures of the filter openings of the plurality of filter meshes (12) are gradually reduced from the opening to the shoulder (10).

4. Safety valve for a steering pump according to claim 1 or 2, characterized in that the pressure ring (13) has a tool opening recessed in both of its opposite inner walls, into which a tool can be inserted.

5. Safety valve for a steering pump according to claim 1 or 2, characterized in that the cross-section of several damping rings (11) is circular.

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