CN211308532U - Piston assembly, control valve with piston assembly and vacuum booster - Google Patents
Piston assembly, control valve with piston assembly and vacuum booster Download PDFInfo
- Publication number
- CN211308532U CN211308532U CN201920568462.1U CN201920568462U CN211308532U CN 211308532 U CN211308532 U CN 211308532U CN 201920568462 U CN201920568462 U CN 201920568462U CN 211308532 U CN211308532 U CN 211308532U
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- Prior art keywords
- piston assembly
- push rod
- bushing
- control valve
- piston
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- 229920006324 polyoxymethylene Polymers 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 5
- 229920006351 engineering plastic Polymers 0.000 claims description 11
- 239000007769 metal material Substances 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 230000003245 working effect Effects 0.000 abstract 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 7
- -1 Polyoxymethylene Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Braking Systems And Boosters (AREA)
Abstract
The utility model relates to a piston assembly, a control valve with the piston assembly and a vacuum booster, wherein the piston assembly comprises a piston and a push rod, one end of the push rod is provided with a ball head structure, an axial clamping groove is arranged at the axle center position of the tail part of the piston, a bushing is detachably arranged in the axial clamping groove, and a spherical inner hole matched with the outer contour of the ball head structure is arranged in the bushing; the bush movably lock joint is in the bulb structure of push rod just the push rod passes through bush detachably installs in the axial draw-in groove. The bush adopts the polyformaldehyde material to make, has improved piston assembly life-span, dismantles convenient and working property is higher.
Description
Technical Field
The utility model relates to an automobile parts technical field specifically relates to a piston assembly and have control valve and vacuum booster of this subassembly.
Background
The vacuum booster is a key part of a modern automobile hydraulic braking system, is directly connected with a brake pedal in a cab, and when a driver steps on the brake pedal, the push rod is pushed to move to open an air valve port to form pressure difference of two cavities in the booster, so that boosting is realized. The vacuum booster directly affects the pedal feel and pedal travel of the driver, where the pedal lost motion is directly related to the clearance between the control valve piston and the control valve push rod.
As shown in fig. 1, the connection between the control valve piston (10) and the control valve push rod (9) in the piston assembly in the prior art is generally realized by riveting. The disadvantages of using riveting method to connect are: during manufacturing, the clearance between the ball head structure at the end of the push rod and the axial clamping groove of the piston and the depth of a riveting point are not easy to control, and a cutter is easy to wear; in addition, if the part roughness control leads to the frictional force increase between bulb structure and the axial draw-in groove easily not good can lead to serious friction and influence life, influence and drive experience.
SUMMERY OF THE UTILITY MODEL
For overcoming the defects and deficiencies in the prior art, the utility model provides a piston assembly which has longer service life, convenient disassembly and higher working performance.
In order to achieve the above object, the first technical solution of the present invention is: a piston assembly comprises a piston and a push rod, wherein one end of the push rod is provided with a ball head structure, an axial clamping groove is formed in the axis position of the tail part of the piston, a bushing is detachably mounted in the axial clamping groove, and a spherical inner hole matched with the outer contour of the ball head structure is formed in the bushing; the bush movably lock joint is in the bulb structure of push rod just the push rod passes through bush detachably installs in the axial draw-in groove.
Preferably, the bushing is made of engineering plastic.
In any of the above embodiments, preferably, the engineering plastic is a Polyoxymethylene (POM) material.
In any of the above schemes, preferably, the axial slot is a circular structure.
In any of the above aspects, preferably, the bushing is of circular configuration.
In any of the above schemes, preferably, a step circle is arranged on the circumferential inner wall of the opening of the axial clamping groove.
In any of the above solutions, it is preferable that a flange that is fitted with the step circle is provided at the end of the bushing; the bush can be lapped on the step circle through the flange. The matching mode of the step circle and the flange can play a good sealing effect.
In any of the above solutions, it is preferable that the bushing is made of a metal material.
In any of the above aspects, preferably, the engineering plastic is nylon.
In any of the above solutions, preferably, the bushing is made of engineering plastic.
In any of the above aspects, preferably, the engineering plastic is nylon.
In any of the above schemes, preferably, the axial slot is a rectangular structure.
A second object of the present invention is to provide a control valve, which comprises a piston assembly.
A third object of the present invention is to provide a vacuum booster, which comprises a control valve.
Compared with the prior art, the utility model has the advantages of: the bushing is made of engineering plastics. Namely, a plastic bushing is added between the piston of the control valve and the push rod of the control valve, so that the assembly mode of the traditional piston assembly is changed. The assembly method not only avoids riveting, but also ensures that the clearance between the control valve piston and the control valve push rod does not need to be additionally controlled. The bush made of high-wear-resistance Polyformaldehyde (POM) is adopted, so that the contact friction between the push rod of the control valve and the bush is far smaller than the friction coefficient between the push rod of the control valve made of the traditional metal material and the piston of the control valve made of the metal material, the working performance of the whole product is improved, and the service life of the whole product is prolonged.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of a piston assembly of a novel control valve applied to a vacuum booster in the prior art.
Fig. 2 is a schematic structural view of a preferred embodiment of a piston assembly according to the present invention.
Fig. 3 is a schematic view of the piston assembly according to the embodiment of the invention shown in fig. 2.
Fig. 4 is a schematic view of the bushing of the embodiment of the piston assembly shown in fig. 2 according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be further explained with reference to the accompanying drawings; in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "tail", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1:
as shown in fig. 2 to 4, the novel control valve piston assembly applied to the vacuum booster comprises a piston 1 and a push rod 3, wherein a ball head structure 8 is arranged at one end of the push rod 3, a circular axial clamping groove 6 is formed in the axle center of the tail part of the piston 1, and a bushing 2 is detachably mounted in the axial clamping groove 6. The bush 2 is of a circular structure and can be placed in the axial clamping groove 6. A spherical inner hole 7 matched with the outer contour of the ball head structure 8 is formed in the bushing 2; bush 2 movably the lock joint just push rod 3 passes through bush 2 detachably installs in axial draw-in groove 6 on push rod 3's bulb structure 8.
Example 2:
as shown in fig. 2-4, a control valve piston assembly includes a piston 1 and a push rod 3, one end of the push rod 3 has a ball head structure 8, a circular axial slot 6 is disposed at an axial center of a tail portion of the piston 1, and a bushing 2 is detachably mounted in the axial slot 6. The bush 2 is of a circular structure and can be placed in the axial clamping groove 6. A spherical inner hole 7 matched with the outer contour of the ball head structure 8 is formed in the bushing 2; bush 2 movably the lock joint just push rod 3 passes through bush 2 detachably installs in axial draw-in groove 6 on push rod 3's bulb structure 8. In the present embodiment, the bushing 2 is made of engineering plastic, in particular, Polyoxymethylene (POM) material.
Example 3:
as shown in fig. 2-4, a control valve piston assembly includes a piston 1 and a push rod 3, one end of the push rod 3 has a ball head structure 8, a circular axial slot 6 is disposed at an axial center of a tail portion of the piston 1, and a bushing 2 is detachably mounted in the axial slot 6. The bush 2 is of a circular structure and can be placed in the axial clamping groove 6. A spherical inner hole 7 matched with the outer contour of the ball head structure 8 is formed in the bushing 2; bush 2 movably the lock joint just push rod 3 passes through bush 2 detachably installs in axial draw-in groove 6 on push rod 3's bulb structure 8. A step circle 5 is arranged on the circumferential inner wall of the opening of the axial clamping groove 6. A flange 4 matched with the step circle 5 is arranged at the tail part of the bushing 2; the bush 2 can be placed on the stepped circle 5 by means of the flange 4. In the present embodiment, the bushing 2 is made of engineering plastic, specifically nylon or Polyoxymethylene (POM) material.
Example 4:
as shown in fig. 2-4, a control valve piston assembly includes a piston 1 and a push rod 3, one end of the push rod 3 has a ball head structure 8, a circular axial slot 6 is disposed at an axial center of a tail portion of the piston 1, and a bushing 2 is detachably mounted in the axial slot 6. The bush 2 is of a circular structure and can be placed in the axial clamping groove 6. A spherical inner hole 7 matched with the outer contour of the ball head structure 8 is formed in the bushing 2; bush 2 movably the lock joint just push rod 3 passes through bush 2 detachably installs in axial draw-in groove 6 on push rod 3's bulb structure 8. A step circle 5 is arranged on the circumferential inner wall of the opening of the axial clamping groove 6. A flange 4 matched with the step circle 5 is arranged at the tail part of the bushing 2; the bush 2 can be placed on the stepped circle 5 by means of the flange 4. In the present embodiment, the bush 2 is made of a metal material, specifically, brass.
Example 5:
as shown in fig. 2-4, a control valve piston assembly includes a piston 1 and a push rod 3, one end of the push rod 3 has a ball head structure 8, an axial slot 6 with a rectangular structure is disposed at an axial center position of a tail portion of the piston 1, and a bushing 2 is detachably mounted in the axial slot 6. The bushing 2 is of a rectangular structure and can be placed in the axial clamping groove 6. A spherical inner hole 7 matched with the outer contour of the ball head structure 8 is formed in the bushing 2; bush 2 movably the lock joint just push rod 3 passes through bush 2 detachably installs in axial draw-in groove 6 on push rod 3's bulb structure 8.
Example 6:
2-4, a control valve employing the control valve piston assembly of any of embodiments 1-6.
Example 7:
as shown in fig. 2 to 4, a vacuum booster employing a control valve as shown in embodiment 7.
After reading this specification, it will be apparent to those skilled in the art that the present invention is formed by a combination of prior art, and some of these prior art forming each part of the present invention are described in detail herein, and some are not described in detail for the sake of brevity of the specification, but will be known to those skilled in the art after reading this specification. Moreover, it will be appreciated by those skilled in the art that the combination of these prior art techniques to form the present invention is highly creative and is a crystal that has been analyzed theoretically and experimented with many years by the inventor. It will also be apparent to those skilled in the art from this disclosure that each of the embodiments disclosed herein, and any combination of features, can be incorporated into the present invention.
Claims (12)
1. The utility model provides a piston assembly, includes piston and push rod, push rod one end has bulb structure, its characterized in that: an axial clamping groove is formed in the axis position of the tail of the piston, a bushing is detachably mounted in the axial clamping groove, and a spherical inner hole matched with the outer contour of the ball head structure is formed in the bushing; the bush movably lock joint is in the bulb structure of push rod just the push rod passes through bush detachably installs in the axial draw-in groove.
2. The piston assembly of claim 1, wherein: the bushing is made of engineering plastics.
3. The piston assembly of claim 2, wherein: the engineering plastic is a Polyformaldehyde (POM) material.
4. The piston assembly of claim 1, wherein: the axial clamping groove is of a circular structure.
5. The piston assembly of claim 1, wherein: the bushing is of a circular structure.
6. The piston assembly of claim 1, wherein: and a step circle is arranged on the circumferential inner wall of the opening of the axial clamping groove.
7. The piston assembly of claim 6, wherein: a flange matched with the step circle is arranged at the tail part of the bushing; the bush can be lapped on the step circle through the flange.
8. The piston assembly of claim 1, wherein: the bushing is made of metal materials.
9. The piston assembly of claim 2, wherein: the engineering plastic is nylon.
10. The piston assembly of claim 1, wherein: the axial clamping groove is of a rectangular structure.
11. Control valve, including piston assembly, its characterized in that: the control valve employs a piston assembly as claimed in any one of claims 1 to 10.
12. Vacuum booster, including the control valve, its characterized in that: the vacuum booster employs a control valve as claimed in claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920568462.1U CN211308532U (en) | 2019-04-24 | 2019-04-24 | Piston assembly, control valve with piston assembly and vacuum booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920568462.1U CN211308532U (en) | 2019-04-24 | 2019-04-24 | Piston assembly, control valve with piston assembly and vacuum booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211308532U true CN211308532U (en) | 2020-08-21 |
Family
ID=72067238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920568462.1U Active CN211308532U (en) | 2019-04-24 | 2019-04-24 | Piston assembly, control valve with piston assembly and vacuum booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211308532U (en) |
-
2019
- 2019-04-24 CN CN201920568462.1U patent/CN211308532U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201124 Address after: No. 456, Binhai 4th Road, Wenzhou Economic Development Zone, Wenzhou City, Zhejiang Province Patentee after: Wenzhou Ruili Automobile Technology Co.,Ltd. Address before: 325299 No. 2666, Avenue, development zone, Ruian Economic Development Zone, Wenzhou, Zhejiang Patentee before: Ruili Group Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240429 Address after: No. 456, Binhai 4th Road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Patentee after: WENZHOU RUILI KORMEE AUTOMOTIVE ELECTRONICS CO.,LTD. Country or region after: China Address before: No.2666, Development Zone Avenue, Ruian Economic Development Zone, Wenzhou, Zhejiang 325200 Patentee before: Wenzhou Ruili Automobile Technology Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |