CN204915654U - Car brake master cylinder's piston assembly - Google Patents
Car brake master cylinder's piston assembly Download PDFInfo
- Publication number
- CN204915654U CN204915654U CN201520654952.5U CN201520654952U CN204915654U CN 204915654 U CN204915654 U CN 204915654U CN 201520654952 U CN201520654952 U CN 201520654952U CN 204915654 U CN204915654 U CN 204915654U
- Authority
- CN
- China
- Prior art keywords
- piston assembly
- spring
- return spring
- piston
- pull back
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
The utility model discloses a car brake master cylinder's piston assembly, including a piston assembly, a return spring, the 2nd return spring and the 2nd piston assembly, the 2nd return spring lies in between a piston assembly and the 2nd piston assembly, a piston assembly is right including being used for the first locating lever of return spring location with be used for right the spring holder of the 2nd return spring location, locating lever and spring holder are frustum of a cone shape structure. The utility model discloses car brake master cylinder's piston assembly, with being used for the locating lever to return spring location to set frustum of a cone shape structure to with the spring holder on the piston assembly, guarantee two return spring return in -processs so on the one hand since contact surface reduced reduced the friction loss, on the other hand return spring can arrive bottom the circular cone under conical surface guide in the automatic positioning to the position of having guaranteed return spring is correct.
Description
Technical field
The utility model belongs to brake system of car technical field, and specifically, the utility model relates to a kind of piston assembly of automobile brake master cylinder.
Background technology
Automobile brake master cylinder is very important assembly parts in brake system of car, is the main guarantee of vehicle safety travel.Pull back spring be in automobile brake master cylinder one play braking return and to ease up the power actuated part of punching, its location and installation situation will directly affect the stable performance of automobile brake master cylinder braking effect, in general automobile brake master cylinder, the location of pull back spring position adopts location, the spring inner sleeve face of cylinder, in Motor Vehicle Braking Procedure, this location makes spring be close to periphery to slidably reciprocate, this situation not only declines because friction causes spring works efficiency, spring stress also can be caused uneven, vehicle brake efficacy is declined.
Utility model content
The utility model provides a kind of piston assembly of automobile brake master cylinder, and object improves the reliability of pull back spring location.
To achieve these goals, the technical scheme that the utility model is taked is: the piston assembly of automobile brake master cylinder, comprise first piston assembly, be positioned at the first pull back spring of first piston assembly side, the second pull back spring being positioned at first piston assembly opposite side and the second piston component be connected with first piston assembly by pipe link, second pull back spring is between first piston assembly and the second piston component, described first piston assembly comprises for the first radius stay to described first pull back spring location with for the spring perch to described second pull back spring location, radius stay and spring perch are truncated cone structure.
Described first radius stay and described spring perch lay respectively at one end of described first piston assembly.
Described second piston component comprises the second radius stay for locating the other end of described second pull back spring.
The piston assembly of the utility model automobile brake master cylinder, by first piston assembly is used for pull back spring location radius stay and spring perch be arranged to truncated cone structure, such one side is guaranteed to reduce frictional loss because contact surface reduces in two pull back spring return processes, pull back spring automatically can navigate to conical base under the conical surface guides on the other hand, thus ensure that the correct position of pull back spring.
Accompanying drawing explanation
This specification sheets comprises the following drawings, shown content respectively:
Fig. 1 is the cutaway view of the automobile brake master cylinder with the utility model piston assembly;
Fig. 2 is the structural representation of first piston assembly;
Fig. 3 is the structural representation of the second piston component;
Fig. 4 is the enlarged drawing of leather cup and backup block contact position;
Be labeled as in figure:
1, cylinder body; 2, the first pull back spring; 3, hydraulic fluid port seal ring; 4, hydraulic fluid port dust plug;
5, first piston assembly; 51, first piston bar; 52, the first radius stay; 53, the first spring perch; 54, the second spring perch; 55, the first orienting lug; 56, the second orienting lug; 57, the first leather cup; 58, the second leather cup; 59, fixed block; 510, the first backup block; 511, the second backup block;
6, the second pull back spring; 7, pad; 8, the second piston component; 81, the second piston rod; 82, the second radius stay; 83, the 3rd backup block; 84, the 3rd leather cup; 85, the 3rd orienting lug; 86, the 3rd spring perch; 9, circlip for bore one; 10, the 4th leather cup; 11, orienting sleeve; 12, circlip for bore two; 13, pipe link.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, be described in further detail detailed description of the invention of the present utility model, object helps those skilled in the art to have more complete, accurate and deep understanding to design of the present utility model, technical scheme, and contribute to its enforcement.
As shown in Figure 1 to Figure 3, for having a kind of automobile brake master cylinder of piston assembly of the present utility model, it comprises cylinder body 1 and piston assembly of the present utility model, this piston assembly comprises first piston assembly 5, be positioned at the first pull back spring 2 of first piston assembly 5 side, be positioned at the second pull back spring 6 of first piston assembly 5 opposite side and the second piston component 8, second pull back spring 6 of being connected with first piston assembly 5 by pipe link 13 between first piston assembly 5 and the second piston component 8.
Specifically, as shown in Figure 1, on the upside of the cylinder body 1 of this master cylinder, hydraulic fluid port has been provided with hydraulic fluid port seal ring 3, and hydraulic fluid port seal ring 3 top hydraulic fluid port dust plug 4 seals hydraulic fluid port, avoids the impurity such as dust to enter.The inner chamber that setting extends along its length in cylinder body 1, inner chamber also forms opening in cylinder body 1 one end, and cylinder body 1 other end is closed.In the inner chamber of cylinder body 1, the first pull back spring 2, first piston assembly 5, second pull back spring 6 and the second piston component 8 is set gradually from closed end to open end, second piston component 8 part is inserted in inner chamber and is connected with first piston assembly 5, and another part stretches out in outside cylinder body 1.
As depicted in figs. 1 and 2, first piston assembly 5 comprises first piston bar 51, the first orienting lug 55 be fixedly connected with first piston bar 51 one end, the second orienting lug 56 be fixedly connected with the piston rod other end, the first backup block 510 be fixedly connected with the first orienting lug 55, the second backup block 511 be fixedly connected with the second orienting lug 56, the fixed block 59 be fixedly connected with the second backup block 511, be sheathed on the first leather cup 57 on the first backup block 510, be sheathed on the second leather cup 58 on the second backup block 511, be fixedly connected with the first backup block 510 and the first radius stay 52 for locating the first pull back spring 2, be sheathed on the first spring perch 53 on the first radius stay 52 and be fixedly connected with fixed block 59 and the second spring perch 54 for locating the second pull back spring 6.First piston bar 51, first orienting lug 55, second orienting lug 56, first backup block 510, second backup block 511 and fixed block 59 are cylindrical structural, and be coaxial connection between adjacent two parts, the first radius stay 52 and the second spring perch 54 are truncated cone structure.First radius stay 52 has bigger diameter end and miner diameter end, and the bigger diameter end of the first radius stay 52 is connected with the first backup block 510, and the bigger diameter end of the first radius stay 52 is less than the diameter of the first backup block 510.First spring perch 53 is sheathed on the first radius stay 52, the inwall of one end conflict cylinder body 1 of the first pull back spring 2, and the other end is conflicted the first spring perch 53.First orienting lug 55 is identical with the diameter of the second orienting lug 56, and the first orienting lug 55 contacts with cylinder body 1 inner headed face with the periphery of the second orienting lug 56.The diameter of first piston bar 51 is less than the diameter of the first orienting lug 55 and the second orienting lug 56, and the second orienting lug 56 is between first piston bar 51 and the second backup block 511, and the second backup block 511 is between the second orienting lug 56 and fixed block 59.Second spring perch 54 is installed on the another side of fixed block 59, second spring perch 54 has bigger diameter end and miner diameter end, the bigger diameter end of the second spring perch 54 is connected with fixed block 59, and the bigger diameter end of the second spring perch 54 is less than the diameter of fixed block 59, the diameter of fixed block 59 is greater than the diameter of the second backup block 511.The miner diameter end of the second spring perch 54 is conflicted towards one end of the second piston component 8, second pull back spring 6 bigger diameter end of the second spring perch 54, and the other end is conflicted the 3rd spring perch 86 on the second piston component 8.
As shown in figures 1 and 3, second piston component 8 comprises coaxial the second piston rod 81, the 3rd orienting lug 85, the 3rd backup block 83 and the second radius stay 82 connected successively, also comprises the 3rd leather cup 84 be sheathed on the 3rd backup block 83 and the 3rd spring perch 86 be sheathed on the second radius stay 82.Second piston rod 81, the 3rd orienting lug 85, the 3rd backup block 83 and the second radius stay 82 are cylindrical structural, the largest diameter of the 3rd orienting lug 85, the diameter of the second piston rod 81 takes second place, and third, the diameter of the second radius stay 82 is minimum for the diameter of the 3rd backup block 83.Second piston rod 81 part is inserted in cylinder body 1 inner chamber, and another part stretches out in outside cylinder body 1.
As shown in Figure 1, be provided with in the open end of cylinder body 1 be sheathed on the 4th leather cup 10 on the second piston rod 81 and orienting sleeve the 11, four leather cup 10 and orienting sleeve 11 two ends respectively by circlip for bore 1 and circlip for bore 2 12 spacing.Meanwhile, for making master brake cylinder of the present utility model install smoothly on automobile chassis frame, pad 7 is also arranged with in the outside of cylinder body 1.
As shown in Figure 4, as preferably, first backup block 510 of first piston assembly 5 contacts with the inner headed face of the first leather cup 57 with the second leather cup 58 respectively with the periphery of the second backup block 511, the periphery of the first backup block 510 and the second backup block 511 is provided with the annular groove extended along whole circumference, and annular groove can arrange vertically multiple.Equally, the periphery of the 3rd backup block 83 of the second piston component 8 contacts with the inner headed face of the 3rd leather cup 84, the periphery of the 3rd backup block 83 is provided with the annular groove extended along whole circumference, and annular groove can arrange vertically multiple.Such setting can make the contact of backup block and leather cup become linear contact lay, reduces area of contact, improves lubrication, extends product service life.
Below by reference to the accompanying drawings the utility model is exemplarily described.Obviously, the utility model specific implementation is not subject to the restrictions described above.As long as have employed the improvement of the various unsubstantialities that method of the present utility model is conceived and technical scheme is carried out; Or without improvement, above-mentioned design of the present utility model and technical scheme directly applied to other occasion, all within protection domain of the present utility model.
Claims (2)
1. the piston assembly of automobile brake master cylinder, comprise first piston assembly, be positioned at the first pull back spring of first piston assembly side, the second pull back spring being positioned at first piston assembly opposite side and the second piston component be connected with first piston assembly by pipe link, second pull back spring is between first piston assembly and the second piston component, it is characterized in that: described first piston assembly comprises for the first radius stay to described first pull back spring location with for the spring perch to described second pull back spring location, radius stay and spring perch are truncated cone structure, described second piston component comprises the second radius stay for locating the other end of described second pull back spring.
2. the piston assembly of automobile brake master cylinder according to claim 1, is characterized in that, described first radius stay and described spring perch lay respectively at one end of described first piston assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520654952.5U CN204915654U (en) | 2015-08-27 | 2015-08-27 | Car brake master cylinder's piston assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520654952.5U CN204915654U (en) | 2015-08-27 | 2015-08-27 | Car brake master cylinder's piston assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204915654U true CN204915654U (en) | 2015-12-30 |
Family
ID=54964812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520654952.5U Expired - Fee Related CN204915654U (en) | 2015-08-27 | 2015-08-27 | Car brake master cylinder's piston assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204915654U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018099638A1 (en) * | 2016-11-30 | 2018-06-07 | Robert Bosch Gmbh | Master brake cylinder, brake system |
-
2015
- 2015-08-27 CN CN201520654952.5U patent/CN204915654U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018099638A1 (en) * | 2016-11-30 | 2018-06-07 | Robert Bosch Gmbh | Master brake cylinder, brake system |
| CN109996708A (en) * | 2016-11-30 | 2019-07-09 | 罗伯特·博世有限公司 | Main braking cylinder, braking equipment |
| JP2019535595A (en) * | 2016-11-30 | 2019-12-12 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Master brake cylinder, brake device |
| CN109996708B (en) * | 2016-11-30 | 2022-04-15 | 罗伯特·博世有限公司 | Main brake cylinder and brake equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20160827 |