CN217270804U

CN217270804U - Steering pump

Info

Publication number: CN217270804U
Application number: CN202221016190.2U
Authority: CN
Inventors: 陈晓燕; 徐富文; 史俊平
Original assignee: Yuhuan Henghua Pump Co ltd
Current assignee: Yuhuan Henghua Pump Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-08-23
Anticipated expiration: 2032-04-28

Abstract

The utility model provides a steering pump belongs to car technical field. It has solved the dead problem of current pressure relief valve card easily of steering pump. This steering pump includes casing, dabber and joins in marriage food tray and pump core, still has the safety chamber in the casing, is provided with safety spring and safety valve core in the safety chamber, has seted up the pressure release hole on the lateral wall in safety chamber, and safety valve core has the axial hole, and the side opening has been seted up to safety valve core's lateral part, still is provided with in the axial hole to be globular ball core, guide bracket and reset spring, has seted up the several on the lateral wall in axial hole and is long banding guide way, several the guide way all is seted up and is centers on safety valve core's axial equipartition, the guide bracket outside has the several protrusion to be flaky direction piece, several the direction piece one-to-one just stretch into in the several guide way guide bracket can be along the guide way round trip movement. The steering pump has the advantage of difficult deadlocking.

Description

Steering pump

Technical Field

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

Background

The steering pump is an important component of a hydraulic power steering system, takes an engine as a power source, is driven by the engine to convert low-pressure oil in an oil tank into high-pressure oil and convey the high-pressure oil to a steering control valve, and the hydraulic energy is converted into mechanical energy to provide boosting force, so that the steering pump plays a role in reducing the operation intensity of a driver and improving the maneuverability of the whole vehicle.

At present, most of steering pumps for automobiles are vane type steering pumps which mainly comprise vane pumps, flow control valves and pressure safety valves; the vane pump provides high-pressure oil, the flow control valve ensures that the steering pump outputs flow suitable for the requirement of the whole vehicle, and the pressure safety valve controls the highest output pressure of the steering pump. When the steering pump works, after the driving shaft drives the rotor to rotate, the blades are opened under the action of centrifugal force and form a working cavity together with the stator, the rotor and the oil distribution disc, when the rotor and the blades rotate from a small arc area to a large arc area on the inner surface of the stator, the volume between the two blades is increased, the pressure is reduced, and oil is absorbed through an oil suction port of the oil distribution disc; when the large arc area is turned to the small arc area, the volume between the two blades is reduced, the pressure is increased, oil is discharged through an oil discharge port of the pressure plate, and the discharged high-pressure oil enters the steering gear through the steering oil pipe to provide steering assistance.

The valve core of the pressure safety valve in the existing steering pump is in a long strip shape, and the opening and closing of the oil drainage channel are realized by depending on oil pressure and a spiral spring, so that the safe use of the steering pump is ensured. However, the elongated valve body is likely to deflect or shift during movement, and may be jammed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a steering pump, solved the dead problem of the easy card of the pressure relief valve of current steering pump.

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

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, an oil outlet and an oil inlet are formed in the shell, a safety cavity communicated with the oil outlet is further formed in the shell, a safety spring and a columnar safety valve core are arranged in the safety cavity, a pressure relief hole communicated with the oil inlet is formed in the side wall of the safety cavity, the safety valve core can block between the pressure relief hole and the oil outlet under the elastic force action of the safety spring, the steering pump is characterized in that an axial hole recessed along the axial direction is formed in one end part of the safety valve core, a side hole capable of communicating the axial hole with the pressure relief hole is formed in the side part of the safety valve core, a convex annular retaining shoulder is formed in the side wall of the axial hole close to the opening position, and a spherical ball core, a guide support and a return spring are further arranged in the axial hole, reset spring's both ends are supported with the inner wall of guide bracket and safety valve core respectively and are leaned on, and the guide bracket pushes away the ball core under reset spring's elastic force effect and supports and lean on keep off and block on the shoulder the axial hole, it is long banding guide way that the several is seted up on the lateral wall of axial hole, several the guide way all is seted up along safety valve core's axial and is centers on safety valve core's axis equipartition, the guide bracket outside has the several protrusion and is flaky guide vane, several the guide vane stretches into in the several guide way just along the guide way round trip movement.

This steering pump is in the use, and when the oil pressure of axial hole opening one side was great, the oil pressure was used in on the ball core, promoted ball core and guide bracket and overcome reset spring's elasticity and remove and leave the fender shoulder, made the axial hole switch on again, fluid can flow to the pressure release hole through axial hole and side opening to flow back to oil inlet department, realized the pressure release, guaranteed the security that the steering pump used. At the in-process of this pressure release, the core is globular, can not block and die, and the direction is realized through the several direction piece of circumference equipartition and the cooperation of guide way to the guide bracket for the guide bracket all has support and direction in the in-process all directions of removal, and difficult skew and the slope of taking place have avoided the dead condition of relief valve card to take place.

In the steering pump, the cross section of the guide bracket is substantially T-shaped, and the guide bracket includes a rod-shaped rod portion and a head portion located at one end of the rod portion, the guide piece is located at the outer side of the rod portion, the head portion is disposed toward the ball core, the width of the head portion is slightly smaller than the width of the axial hole, the outer side of the head portion is provided with a recessed flow-through groove through which oil can pass, the return spring is sleeved at the outer side of the rod portion, and one end of the return spring abuts against the other end of the head portion opposite to the ball core. The head slightly is less than the width in axial hole, can reduce guide holder can sway the space, avoid deflecting too much and the card is dead, simultaneously, the guide vane in the cooperation pole portion outside carries out the multiple spot to whole guide holder and supports, further avoids deflecting, and the flow when overflowing seting up in groove and can guaranteeing the pressure release.

In the steering pump, one end of the head of the guide bracket, which faces the ball core, is provided with a concave and conical limiting groove into which the ball core part can extend. The position of the ball core is limited through the limiting groove, and the sealing effect when the ball core is abutted against the retaining shoulder is guaranteed.

In the steering pump, a raised annular shoulder is arranged on the inner wall of the shell between the oil outlet and the pressure relief hole, an annular sealing gasket is fixed at one end of the shoulder facing the pressure relief hole, and the safety valve core is abutted against the sealing gasket under the elastic action of a safety spring and blocks the oil outlet from the pressure relief hole. Through the arrangement of the sealing gasket, even if the safety valve core deflects in a small amplitude, the position can be finely adjusted by means of the deformation of the sealing gasket.

In the steering pump, the opening of the axial hole is positioned on the end face of the other end of the safety valve core facing the convex shoulder, and the shell is internally provided with a pressure relief channel for communicating the oil outlet to the axial hole.

Compared with the prior art, this steering pump's ball core is globular, can not block and die, and the several direction piece and the cooperation realization of guide way that the guide bracket passes through head and pole portion outside circumference equipartition support and direction for the guide bracket is difficult for taking place skew and slope at the in-process that removes, has avoided the dead condition of relief valve card to take place.

Drawings

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

Fig. 2 is a schematic cross-sectional view of the safety valve core of the steering pump.

In the figure, 1, a housing; 2. a mandrel; 3. an oil distribution disc; 4. a pump core; 5. an oil outlet; 6. a safety chamber; 7. a safety spring; 8. a safety valve core; 9. an axial bore; 10. a side hole; 11. a shoulder block; 12. a ball core; 13. a guide bracket; 14. a return spring; 17. a limiting groove; 18. a shoulder is formed; 19. a pressure relief channel.

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.

As shown in fig. 1, the steering pump includes a housing 1, a mandrel 2 partially penetrating the housing 1, and an oil distribution disc 3 and a pump core 4 both disposed in the housing 1, wherein the housing 1 has an oil outlet 5 and an oil inlet.

As shown in fig. 2, a safety chamber 6 communicated with the oil outlet 5 is further arranged in the housing 1, a safety spring 7 and a cylindrical safety valve core 8 are arranged in the safety chamber 6, and a pressure relief hole communicated to the oil inlet is formed in the side wall of the safety chamber 6. A convex annular convex shoulder 18 is arranged on the inner wall of the shell 1 between the oil outlet 5 and the pressure relief hole, an annular sealing gasket is fixed at one end of the convex shoulder 18 facing the pressure relief hole, and the safety valve core 8 is abutted against the sealing gasket under the elastic action of the safety spring 7 and blocks the oil outlet 5 from the pressure relief hole. In this embodiment, the housing 1 includes a main body and an oil outlet bolt screwed in the main body, the oil outlet 5 axially penetrates through the oil outlet bolt, and the shoulder 18 is located on the oil outlet bolt; the shell 1 is also internally provided with a pressure relief channel 19 which is used for communicating the oil outlet 5 to the other end of the safety cavity 6 opposite to the oil outlet 5, and the oil relief channel is formed by sequentially communicating three branch holes.

The other end part of the safety valve core 8 relative to the oil outlet 5 is provided with an axial hole 9 which is recessed along the axial direction, and the side part of the safety valve core 8 is provided with a side hole 10 which can communicate the axial hole 9 to a pressure relief hole. The side wall of the axial hole 9 near the opening position is provided with a protruding circular blocking shoulder 11, the axial hole 9 is also internally provided with a spherical ball core 12, a guide support 13 and a return spring 14, two ends of the return spring 14 are respectively abutted against the inner walls of the guide support 13 and the safety valve core 8, and the guide support 13 pushes the ball core 12 to abut against the blocking shoulder 11 and block the axial hole 9 under the elastic action of the return spring 14.

In order to ensure the stability of the movement of the guide support 13, at least three guide grooves which are long-strip-shaped are formed in the side wall of the axial hole 9, the plurality of guide grooves are formed in the axial direction of the safety valve element 8 and are uniformly distributed around the axis of the safety valve element 8, the same number of protruding sheet-shaped guide pieces are arranged on the outer side of the guide support 13, the plurality of guide pieces correspondingly extend into the plurality of guide grooves one to one, and the guide support 13 can move back and forth along the guide grooves. In this embodiment, the thickness and the projecting height of the guide piece are slightly smaller than the width and the depth of the guide groove, respectively.

Specifically, the cross section of the guide bracket 13 is substantially T-shaped, and includes a rod portion in the shape of a round rod and a head portion located at one end of the rod portion, the guide piece is located at the outer side of the rod portion, the head portion is disposed toward the ball core 12, the width of the head portion is slightly smaller than the width of the axial hole 9, a concave flow passage groove through which oil can pass is formed in the outer side of the head portion, the return spring 14 is sleeved on the outer side of the rod portion, and one end of the return spring 14 abuts against the other end of the head portion relative to the ball core 12. In this embodiment, the overflow grooves are long-strip-shaped, the number of the overflow grooves is several, and the overflow grooves are all arranged along the axial direction of the safety valve core 8, the several overflow grooves are uniformly distributed around the axis of the rod part, and the bottom surfaces of the overflow grooves are arc surfaces; the end of the head of the guide bracket 13 facing the core 12 has a concave and conical limiting groove 17 into which the core 12 partially extends.

This steering pump is in the use, when oil-out 5 department closed, fluid flows to the 9 open positions of axial hole in the safety chamber 6 through pressure release channel 19, the oil pressure is used in on core 12, promote core 12 and guide bracket 13 and overcome reset spring 14's elasticity and remove and leave fender shoulder 11, make axial hole 9 switch on again, fluid can flow to the pressure release hole through axial hole 9 and side opening 10, and the oil inlet department is flowed back to the cocurrent flow, realizes the pressure release, the security of guaranteeing the steering pump to use.

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

1. The steering pump comprises a shell (1), a mandrel (2) partially penetrating the shell (1), an oil distribution disc (3) and a pump core (4) both arranged in the shell (1), wherein the shell (1) is provided with an oil outlet (5) and an oil inlet, the shell (1) is also internally provided with a safety cavity (6) communicated with the oil outlet (5), the safety cavity (6) is internally provided with a safety spring (7) and a columnar safety valve core (8), the side wall of the safety cavity (6) is provided with a pressure relief hole communicated with the oil inlet, the safety valve core (8) can block the pressure relief hole from the oil outlet (5) under the elastic action of the safety spring (7), and the steering pump is characterized in that one end of the safety valve core (8) is provided with an axial hole (9) recessed along the axial direction, the side part of the safety valve core (8) is provided with a side hole (10) capable of communicating the axial hole (9) to the pressure relief hole, axial hole (9) have the protrusion on being close to the lateral wall of open position and be annular fender shoulder (11), still be provided with in axial hole (9) and be globular ball core (12), guide holder (13) and reset spring (14), reset spring (14)'s both ends respectively with guide holder (13) and safety valve core (8) inner wall counterbalance lean on, guide holder (13) promote ball core (12) to support under reset spring's (14) spring action and lean on and block on shoulder (11) axial hole (9), seted up the several on the lateral wall of axial hole (9) and be long banding guide way, several the guide way is all seted up and is centers on along safety valve core's (8) axial equipartition safety valve core's (8) axis equipartition, guide holder (13) outside has the several protrusion and is flaky guide plate, several the guide plate stretches into in the several guide way one-to-one and guide holder (13) can make a round trip to move along the guide way and move back and forth And (6) moving.

2. Steering pump according to claim 1, characterized in that the guide bracket (13) is substantially T-shaped in cross-section and comprises a rod-shaped portion and a head portion at one end of the rod portion, the guide plate is located outside the rod portion, the head portion is arranged towards the ball core (12), the width of the head portion is slightly smaller than the width of the axial hole (9), the outside of the head portion has a recessed flow-through groove for oil to pass through, the return spring (14) is sleeved outside the rod portion, and one end of the return spring (14) abuts against the other end of the head portion opposite to the ball core (12).

3. A steering pump according to claim 2, characterized in that the end of the head of the guide bracket (13) facing the core (12) is provided with a concave and conical limiting groove (17) into which a part of the core (12) can extend.

4. A steering pump according to claim 1, 2 or 3, characterized in that a raised annular shoulder (18) is arranged on the inner wall of the housing (1) between the oil outlet (5) and the pressure relief hole, an annular sealing gasket is fixed on one end of the shoulder (18) facing the pressure relief hole, and the safety valve core (8) is abutted against the sealing gasket under the elastic force of the safety spring (7) to block the oil outlet (5) and the pressure relief hole.

5. A steering pump according to claim 4, characterized in that the opening of the axial bore (9) is located on the other end face of the safety spool (8) facing the shoulder (18), and a pressure relief channel (19) communicating the oil outlet (5) to the axial bore (9) is provided in the housing (1).