CN212709354U

CN212709354U - Air valve for vacuum booster

Info

Publication number: CN212709354U
Application number: CN202021459595.4U
Authority: CN
Inventors: 董西杰; 王健; 苏潘根
Original assignee: Zhejiang Huifeng Auto Parts Co ltd
Current assignee: Zhejiang Huifeng Auto Parts Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-03-16
Anticipated expiration: 2030-07-22

Abstract

The utility model provides an air valve for vacuum booster belongs to auto-parts technical field. It has solved the current air valve for vacuum servo unit and has sealed not good, the big scheduling problem of noise. This air valve for vacuum booster includes the body, the upper end of body has the bulge loop one of the radial evagination of round, the middle part of body still has the bulge loop two of the radial evagination of round, the upper end of body has the cavity of axial extension, bulge loop one, bulge loop two and cavity all set up with the body is coaxial, the up end of bulge loop one has the recess and the mounting groove with the coaxial setting of body, the equal fillet transition in edge of the notch of mounting groove and bulge loop up end, the outer wall of bulge loop one has the round conical surface, the tip that the conical surface external diameter is little is crossing to the fillet of bulge loop up end edge straightly. The utility model has the advantages of the leakproofness is good, noise reduction effect is good.

Description

Air valve for vacuum booster

Technical Field

The utility model belongs to the technical field of auto-parts, a vacuum booster accessory is related to, in particular to air valve for vacuum booster.

Background

The internal cavity of the air valve (also called as an air valve seat in the industry) in the vacuum booster is matched and connected with the spheroid at the tail end of the push rod, but the air valve and the connecting sleeve are easy to move radially, so that the service life of the vacuum booster is shortened.

In view of the above problems, various air valve seats for vacuum boosters have been designed, and some patents have been applied, for example, chinese patent documents disclose an air valve seat for a vacuum booster [ application No.: 201220434612.8, respectively; authorization notice number: CN202783181U ], which comprises a cylindrical body, wherein one end of the body has a first annular boss protruding from the sidewall of the body, the middle of one end of the body has a cavity, the other end of the body has a boss protruding from the other end of the body, the boss is cylindrical and coaxial with the body, the body is further provided with a second annular boss protruding from the sidewall of the body, and the second annular boss and the annular boss are coaxial.

Foretell air valve seat prevents through the setting of boss that body and rubber pad from taking place radial movement, and the location is comparatively reliable, has prolonged vacuum booster's life, but the outer terminal surface corner of annular boss one can not form fine sealed, and the fit clearance is big, can the noise transfer, influences the NVH performance of car.

Disclosure of Invention

The utility model aims at providing an air valve for vacuum booster that noise reduction effect is good to the above-mentioned problem that exists among the prior art.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides an air valve for vacuum booster, includes the body, the upper end of body have the radial bulge loop of evagination of round one, the middle part of body still has the bulge loop two of the radial evagination of round, the upper end of body the cavity that has the axial extension, bulge loop one, bulge loop two and cavity all with the coaxial setting of body, its characterized in that, the up end of bulge loop one have the recess and with the coaxial mounting groove that sets up of body, the notch of mounting groove and the equal fillet transition in edge of a bulge loop up end, the outer wall of bulge loop one have the round conical surface, the tip that the external diameter of conical surface is little intersect to the fillet of a bulge loop up end edge straightly.

In the air valve for the vacuum booster, the outer end of the concave cavity is provided with a flaring conical surface I, and the inner end of the concave cavity is provided with a concave conical surface II.

In the air valve for the vacuum booster, the body is provided with a blind hole at the inner end of the cavity, and the blind hole is coaxial with the body.

In the air valve for a vacuum booster, the lower end of the body has a reduced diameter section, and the outer diameter of the reduced diameter section is smaller than that of the body.

In the air valve for the vacuum booster, the reducing section is provided with a circle of annular groove at the position close to the outer wall of the bottom end.

In the air valve for the vacuum booster, the bottom end of the reducing section is in a reducing shape, and the bottom end of the reducing section is provided with a guide conical surface which is in a conical surface transition to the annular groove.

In the air valve for the vacuum booster, the sealing ring is embedded in the outer wall of the body, which is close to the lower bottom surface of the convex ring II.

Compared with the prior art, the air valve for the vacuum booster is convenient to assemble, high in assembling precision, stable in axial displacement, good in working stability and good in noise reduction effect.

Drawings

Fig. 1 is a sectional view showing the structure of the air valve for a vacuum booster used in example 1.

Fig. 2 is an enlarged view of the structure of fig. 1 at circle a.

Fig. 3 is a structural sectional view of the air valve for a vacuum booster used in example 2.

In the figure, 1, a body; 2. a first convex ring; 3. a convex ring II; 4. a concave cavity; 5. mounting grooves; 6. round corners; 7. a conical surface; 8. a first conical surface; 9. a second conical surface; 10. blind holes; 11. a reducing section; 12. an annular groove; 13. a guiding conical surface; 14. and (5) sealing rings.

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.

Example 1

As shown in fig. 1 and 2, the air valve for the vacuum booster comprises a body 1, wherein a circle of first convex ring 2 protruding radially outwards is arranged at the upper end of the body 1, a circle of second convex ring 3 protruding radially outwards is further arranged at the middle part of the body 1, a cavity 4 extending axially is arranged at the upper end of the body 1, the first convex ring 2, the second convex ring 3 and the cavity 4 are all arranged coaxially with the body 1, an upper end face of the first convex ring 2 is provided with a mounting groove 5 recessed and arranged coaxially with the body 1, a notch of the mounting groove 5 is in transition with an edge of an upper end face of the first convex ring 2 through a round angle 6, the outer wall of the first convex ring 2 is provided with a circle of conical surface 7, and an end part with a small outer diameter of the conical surface 7 is intersected with.

This air valve for vacuum servo-actuator passes through the setting of mounting groove 5, fillet 6, reduces 2 up end of bulge ring and keeps off the area of contact when leaning on for the assembly position precision is high, and the edge that the conical surface 7 was provided with and helps 2 up end of bulge ring forms fillet 6, conical surface 7 is sealed moreover, reduces fit clearance, and the transmission of effective separation noise reaches the purpose of making an uproar.

In more detail, the outer end of the concave cavity 4 is provided with a flaring conical surface I8, the inner end of the concave cavity 4 is provided with a concave conical surface II 9, and the conical surface I8 plays a role in guiding, so that a spherical body at the tail end of the push rod can be conveniently inserted into the concave cavity 4, and the connection is convenient; the contact area between the second conical surface 9 and the spherical body at the tail end of the push rod is large, and the input force transmission effect is good; the body 1 is provided with a blind hole 10 which is coaxial with the body 1 at the inner end of the cavity 4, the blind hole 10 is convenient for processing and positioning, lubricating grease can be stored, the abrasion of the inner end and the inner wall of the cavity 4 and the push rod spheroid is reduced, and the service life is prolonged.

The lower extreme of body 1 has reducing section 11, and the external diameter of reducing section 11 is less than the external diameter of body 1, and reducing section 11 not only plays the weight reduction effect, reduces the area of contact with the guide holder inner wall moreover, and the displacement is more smooth and easy.

Example 2

As shown in fig. 3, the structure and principle of the present embodiment are substantially the same as those of embodiment 1, and the difference lies in that in the present embodiment, a circle of annular groove 12 is formed at an outer wall of the reducing section 11 near the bottom end, a part of the reducing section 11 is inserted into a connecting hole of the rubber block, and the annular groove 12 is used for embedding a radially inward convex ring in the connecting hole of the rubber block, so that the connecting firmness is improved, the occurrence of abnormal noise caused by friction when the lower end of the body 1 touches the rubber block in the past is avoided, and the noise reduction effect is good; the bottom end of the reducing section 11 is in a reducing shape, the bottom end of the reducing section 11 is provided with a guiding conical surface 13 which is in a conical surface transition to the annular groove 12, and the guiding conical surface 13 plays a guiding role, so that the reducing section 11 and the rubber block can be conveniently assembled.

The outer wall department that body 1 is close to bottom surface under the bulge loop two 3 inlays and is equipped with sealing washer 14, and body 1 is at the axial displacement in-process, and sealing washer 14 seals in the guide holder inner wall all the time, avoids 1 turnover of body, also plays the effect of isolated noise, has further improved noise reduction.

Those not described in detail in this specification are within the skill of the art. 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. An air valve for a vacuum booster comprises a body (1), wherein the upper end of the body (1) is provided with a circle of first radially outwards convex ring (2), the middle part of the body (1) is also provided with a circle of second radially outwards convex ring (3), the upper end of the body (1) is provided with a concave cavity (4) which extends axially, the first convex ring (2), the second convex ring (3) and the concave cavity (4) are all arranged coaxially with the body (1), it is characterized in that the upper end surface of the first convex ring (2) is provided with a concave mounting groove (5) which is coaxial with the body (1), the notch of the mounting groove (5) and the edge of the upper end surface of the convex ring I (2) are in transition by a round angle (6), the outer wall of the first convex ring (2) is provided with a circle of conical surface (7), and the end part with the small outer diameter of the conical surface (7) is straightly intersected with the fillet (6) of the edge of the upper end face of the first convex ring (2).

2. The air valve for a vacuum booster as claimed in claim 1, wherein the outer end of the cavity (4) has a first tapered surface (8) with a flared shape, and the inner end of the cavity (4) has a second recessed tapered surface (9).

3. The air valve for the vacuum booster as claimed in claim 2, wherein the body (1) is provided with a blind hole (10) at the inner end of the cavity (4) and coaxial with the body (1).

4. The air valve for a vacuum booster according to claim 3, wherein the lower end of the body (1) has a reduced diameter section (11), and the reduced diameter section (11) has an outer diameter smaller than that of the body (1).

5. The air valve for a vacuum booster as claimed in claim 4, wherein the reduced diameter section (11) has a ring-shaped groove (12) in the outer wall thereof near the bottom end.

6. The air valve for a vacuum booster as claimed in claim 5, wherein the bottom end of the reduced diameter section (11) is reduced in a throat shape, and the bottom end of the reduced diameter section (11) has a guiding tapered surface (13) which transitions from the tapered surface (7) to the annular groove (12).

7. The air valve for the vacuum booster as claimed in claim 6, wherein the sealing ring (14) is embedded in the outer wall of the body (1) close to the lower bottom surface of the second protruding ring (3).