CN218235471U

CN218235471U - Plugging structure of steering pump

Info

Publication number: CN218235471U
Application number: CN202222651308.5U
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: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-06
Anticipated expiration: 2032-09-30

Abstract

The utility model provides a block structure of steering pump belongs to car technical field. It has solved the easy problem of leaking of current end cap department. The steering pump comprises a shell, a through oil hole is formed in the shell in a penetrating mode, the through oil hole is close to an opening to form a cylindrical mounting hole, a convex shoulder is formed at the inner end of the mounting hole, the blocking structure comprises a sealing ring, an extrusion piece, a steel ball and a pressing ring which are all arranged in the mounting hole, the smaller outer diameter end of the extrusion piece is sealed and faces the through oil hole, the end portion of the sealing end of the extrusion piece penetrates through the inner hole of the sealing ring, the outer side face of the extrusion piece is abutted to the sealing ring, the diameter of the steel ball is not larger than the maximum inner diameter of the extrusion piece, the steel ball is partially located in the extrusion piece, the pressing ring is in the outer end of the mounting hole in threaded connection mode, and the pressing ring can push the inner wall of the steel ball extrusion piece when screwed in along the threads and the outer wall of the extrusion piece outwards tightly presses the sealing ring. This block structure of steering pump has the advantage that is difficult for leaking.

Description

Plugging structure of steering pump

Technical Field

The utility model belongs to the technical field of the car, a block structure of 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 rotated 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 power.

The steering pump is provided with a plurality of oil holes for conveying oil, each oil hole cannot be directly formed during manufacturing of the shell, holes are often drilled again from the corresponding position outside the shell after the shell is manufactured, and in order to avoid leakage of the oil from the opening position of the hole, a plug is required to be arranged at the opening position of the oil hole for plugging. The existing plug usually adopts a single threaded plug structure, however, due to the thread machining error and the condition that the oil pressure in the steering pump is increased, leakage is easy to occur at the plug.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a block structure of steering pump, solved the easy problem of leaking of current end cap department.

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

the utility model provides a block structure of steering pump, steering pump include that casing, part wear to locate the dabber in the casing and all set up food tray and pump core in the casing, run through in the casing and seted up the oilhole, the oilhole is close to the aperture of opening part great in order to form cylindric mounting hole, the interior end department of mounting hole forms the protrusion and is the annular convex shoulder of circle, its characterized in that, block structure including all set up in the mounting hole be the annular rubber materials of adoption in the circle make the sealing washer, adopt the metal material to make be the extruded article, the steel ball of awl tube form and be annular clamping ring, the terminal surface of sealing washer one end with the terminal surface counterbalance of convex shoulder leans on, the lateral surface of sealing washer with the pore wall counterbalance of mounting hole leans on, the less one end of external diameter seals and sets up towards in the oilhole on the extruded article, the blind end portion of extruded article passes the hole of sealing washer and the lateral surface of extruded article with the sealing washer counterbalance leans on, the diameter of steel ball is not more than the biggest internal diameter and steel ball part of extruded article are located in the extruded article, clamping ring threaded connection be in mounting hole outer end department, and can promote when the clamping ring is precession along the screw extrusion the steel ball the inner wall of steel ball extrude and make the outer wall of steel ball sticis tight on the sealing washer.

This block structure of steering pump relies on the extruded article lateral surface to withstand the softer sealing washer of texture, promote the inner wall that the steel ball moved inwards and extruded article by the precession gradually of clamping ring, make the extruded article along with the steel ball constantly moves inwards, the mode on the sealing washer is sticis through the outer wall of extruded article, make the outside and the terminal surface of sealing washer closely support respectively and lean on mounting hole pore wall and convex shoulder, in order to reach inseparabler sealed effect, can not take place to leak, and even if use for a long time and lead to sealed position not hard up, also can further inwards precession clamping ring, make the sealing washer compress tightly sealed again, guarantee sealed effect.

In the above sealing structure of the steering pump, the side wall of the inner end of the mounting hole is provided with a plurality of teeth protruding in an annular shape, the plurality of teeth are distributed at intervals along the axial direction of the mounting hole, and the outer side part of the sealing ring is embedded into gaps between the plurality of teeth.

In the above sealing structure of the steering pump, a plurality of concave circular grooves are formed in the end face of the shoulder facing the end face of the sealing ring, the plurality of concave circular grooves are coaxial with the sealing ring, and the end part of the sealing ring is embedded into the plurality of concave grooves.

In foretell block structure who turns to pump, the tip has the protrusion in the clamping ring and is the annular promotion portion of circle, and the tip of promotion portion supports and leans on the steel ball, promotion portion is close to the inner wall setting of clamping ring, and the outside cover of promotion portion is equipped with and is annular sealing member, the outer end of extruded article has and is cylindric guide part, the terminal surface that the sealing member was faced extruded article one end supports and leans on the outer terminal surface of guide part, the lateral surface of sealing member with the pore wall counterbalance of mounting hole leans on.

In the above sealing structure of the steering pump, the inner side wall of the pressure ring is provided with two concave tool grooves, and the two tool grooves are located on two opposite sides of the pressure ring.

In the above blocking structure of the steering pump, the sealing ring has a conical pressing surface facing the pressing member, and the diameter of the pressing surface gradually increases from inside to outside.

Compared with the prior art, this block structure of steering pump passes through the clamping ring precession, and the mode that cooperation steel ball and extruded article come the extrusion sealing washer improves sealed effect, has avoided the condition emergence of oil hole department leakage, and through the setting of sealing member, realizes dual seal, further guarantees sealed effect.

Drawings

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

Fig. 2 is a schematic sectional structural view of the blocking structure of the present steering pump.

In the figure, 1, a housing; 2. an oil passing hole; 3. mounting holes; 4. shouldering; 5. a seal ring; 6. an extrusion member; 7. steel balls; 8. pressing a ring; 9. teeth; 10. a groove; 11. a pushing part; 12. a seal member; 13. a guide portion.

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 and 2, the steering pump includes a housing 1, a mandrel partially penetrating the housing 1, and an oil distribution disc and a pump core both disposed in the housing 1, an oil passing hole 2 is formed through the housing 1, a diameter of the oil passing hole 2 near an opening is large to form a cylindrical mounting hole 3, and a convex shoulder 4 protruding in a circular ring shape is formed at an inner end of the mounting hole 3.

The sealing structure of the steering pump comprises a sealing ring 5 which is arranged in the mounting hole 3 and made of a rubber material in an annular shape, an extrusion piece 6 which is made of a metal material in a cone shape, a steel ball 7 in a spherical shape and a pressing ring 8 in an annular shape. The end surface of one end of the sealing ring 5 abuts against the end surface of the convex shoulder 4, and the outer side surface of the sealing ring 5 abuts against the hole wall of the mounting hole 3. The less one end of external diameter seals and sets up towards crossing in the oilhole 2 on extruded article 6, the blind end tip of extruded article 6 passes the hole of sealing washer 5 and the lateral surface of extruded article 6 leans on with sealing washer 5 counterbalance, the diameter of steel ball 7 is not more than the biggest internal diameter of extruded article 6 and the steel ball 7 part is located extruded

article

6, 8 threaded connection of clamping ring is in 3 outer extreme departments of mounting hole, and 8 outer walls that can promote 7 extruded article 6 of steel ball and make extruded article 6 when the screw precession of clamping ring outwards sticiss on sealing washer 5.

Wherein, the side wall of the inner end of the mounting hole 3 is provided with a plurality of protruding circular teeth 9, the plurality of teeth 9 are distributed along the axial direction of the mounting hole 3 at intervals, and the outer part of the sealing ring 5 is embedded into the gaps among the plurality of teeth 9. The end face of one end of the convex shoulder 4 facing the sealing ring 5 is provided with a plurality of concave circular grooves 10, the plurality of grooves 10 are arranged coaxially with the sealing ring 5, and the end part of the sealing ring 5 is embedded into the plurality of grooves 10. In this embodiment, the cross-sectional shapes of the teeth 9 and the grooves 10 are both triangular, and the sealing ring 5 is made of a soft material, so that the sealing ring 5 is partially embedded into a concave-convex structure, thereby improving the sealing effect, and the sealing ring 5 has a conical extrusion surface towards the extrusion part 6, and the aperture of the extrusion surface is gradually increased from inside to outside so as to better fit the extrusion part 6, thereby forming axial and radial component forces and ensuring the sealing effect.

The tip has that the protrusion is the annular promotion portion 11 in clamping ring 8, and the tip of promotion portion 11 supports and leans on steel ball 7, and this promotion portion 11 is close to the inner wall setting of clamping ring 8, and 11 outside covers of promotion portion are equipped with and are annular sealing member 12, and the outer end of extruded article 6 has and is cylindric guide part 13, and sealing member 12 supports and leans on the outer terminal surface of guide part 13 towards the terminal surface of extruded article 6 one end, and the lateral surface of sealing member 12 supports with the pore wall of mounting hole 3 and leans on. In the embodiment, the sealing element 12 is a sealing element made of rubber material, and may be a common fitting such as an O-ring; in order to facilitate the rotation of the pressing ring 8 for precession, the inner side wall of the pressing ring 8 has two concave tool slots, and the two tool slots are located on two opposite sides of the pressing ring 8.

This block structure of steering pump relies on 6 lateral surfaces of extruded article to withstand the softer sealing washer 5 of texture, promote the inner wall that steel ball 7 moves inwards and extrude extruded article 6 by the precession gradually of clamping ring 8, make extruded article 6 along with steel ball 7 constantly moves inwards, the mode on sealing ring 5 is sticis through the outer wall of extruded article 6, make the outside and the terminal surface of sealing ring 5 closely support respectively and lean on 3 pore walls of mounting hole and convex shoulder 4, in order to reach inseparabler sealed effect, can not take place to leak, and even if use for a long time leads to sealed position not hard up, also can further inwards precession clamping ring 8, make sealing ring 5 compress tightly sealed again, guarantee sealed effect. Simultaneously, in the precession process of clamping ring 8, the terminal surface of sealing member 12 closely supports all the time with the outer terminal surface of guide part 13 and leans on, and under the effect of guide part 13 and promotion portion 11, sealing member 12 can outwards form, further improves the sealed effect of sealing member 12 and mounting hole 3 lateral wall, finally forms dual seal effect together with sealing washer 5, avoids leaking.

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

Claims

1. The utility model provides a shutoff structure of steering pump, steering pump include casing (1), part wear to locate the dabber in casing (1) and all set up join in marriage food tray and pump core in casing (1), run through in casing (1) and seted up oilhole (2), it is great in order to form cylindric mounting hole (3) to cross the aperture that oilhole (2) are close to the opening part, the interior end department of mounting hole (3) forms the protrusion and is annular shoulder (4), its characterized in that, shutoff structure including all set up in be in the mounting hole (3) be the annular sealing washer (5) that adopts rubber materials to make of annular, adopt the metal material to make be extrusion piece (6), steel ball (7) of awl tube form and be annular clamping ring (8), the terminal surface of sealing washer (5) one end with the terminal surface counterbalance of shoulder (4) is leaned on, the lateral surface of sealing washer (5) with the pore wall of mounting hole (3) leans on, the less one end of external diameter seals and is towards in extrusion piece (6) and sets up in the extrusion piece (6), the blind end of sealing washer (5) passes the sealing washer (6) and the steel ball (7) is not more than the diameter of sealing washer (6) and the sealing washer (6) the internal diameter (7) is not more than the steel ball (7) the diameter of extrusion piece (7) the extrusion piece (6) is not more than the diameter of extrusion piece (6) the internal diameter of extrusion piece (7), clamping ring (8) threaded connection is in mounting hole (3) outer end department, and clamping ring (8) can promote when screw precession steel ball (7) extrusion the inner wall of extruded article (6) makes the outer wall of extruded article (6) is outwards sticis in on sealing washer (5).

2. The block structure of a steering pump according to claim 1, wherein the side wall of the inner end of the mounting hole (3) is provided with a plurality of teeth (9) protruding in an annular shape, the plurality of teeth (9) are distributed at intervals along the axial direction of the mounting hole (3), and the outer side part of the sealing ring (5) is embedded in gaps among the plurality of teeth (9).

3. The block structure of a steering pump according to claim 1 or 2, characterized in that the end surface of the shoulder (4) facing the sealing ring (5) is provided with a plurality of concave circular grooves (10), the plurality of concave circular grooves (10) are coaxial with the sealing ring (5), and the end part of the sealing ring (5) is embedded in the plurality of concave circular grooves (10).

4. The blocking structure of a steering pump according to claim 1 or 2, characterized in that, clamping ring (8) inner end portion has protrusion and is annular promotion portion (11), and the tip of promotion portion (11) supports and leans on steel ball (7), promotion portion (11) are close to the inner wall setting of clamping ring (8), and promotion portion (11) outside cover is equipped with and is annular sealing member (12), the outer end of extruded article (6) has and is cylindric guide part (13), sealing member (12) support towards the terminal surface of extruded article (6) one end and lean on the outer terminal surface of guide part (13), the lateral surface of sealing member (12) with the pore wall of mounting hole (3) supports and leans on.

5. A block structure of a steering pump according to claim 4, characterized in that the inner side wall of the pressure ring (8) has two concave tool grooves, which are located on opposite sides of the pressure ring (8).

6. The block structure of a steering pump according to claim 1 or 2, wherein the sealing ring (5) has a tapered pressing surface facing the pressing member (6), and the diameter of the pressing surface gradually increases from the inside to the outside.