CN109253184A - The manufacturing method of piston, clutch release system master cylinder and piston main body - Google Patents
The manufacturing method of piston, clutch release system master cylinder and piston main body Download PDFInfo
- Publication number
- CN109253184A CN109253184A CN201710565151.5A CN201710565151A CN109253184A CN 109253184 A CN109253184 A CN 109253184A CN 201710565151 A CN201710565151 A CN 201710565151A CN 109253184 A CN109253184 A CN 109253184A
- Authority
- CN
- China
- Prior art keywords
- main body
- piston
- piston main
- sealed area
- axial
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
The present invention provides the manufacturing method of piston, clutch release system master cylinder and piston main body.Piston for clutch release system master cylinder includes piston main body, and piston main body includes positioned at the flange of its axial one end, positioned at the auxiliary sealed area of the axial other side of flange.Piston main body further includes the locating slot positioned at the axial other side of auxiliary sealed area, in the axial direction of piston main body, auxiliary sealed area is limited between flange and locating slot, the diameter of auxiliary sealed area is greater than or equal to the maximum gauge of the part of the axial other side positioned at the auxiliary sealed area of piston main body.In the present invention, can come via flange and with the locating piece of locating slot cooperation to carry out axial limiting to additional confinement.Can use the inner peripheral surface axially demoulded is circular single mold to form auxiliary sealed area, and this avoid the leakages of brake fluid caused by die parting line.
Description
Technical field
The present invention relates to the clutch release systems in Vehicle Engineering, more particularly relate to clutch release system master
The piston of cylinder, clutch release system master cylinder and the piston including the piston piston main body manufacturing method.
Background technique
Clutch release system master cylinder is known in the prior art.Fig. 1 shows a kind of master cylinder in the prior art
1.The master cylinder 1 has master cylinder shell 2, and piston 3 is axially displaceably guided in master cylinder shell 2.Piston 3 passes through piston rod 4
Such as it is forced into cylinder inner cavity (in master cylinder shell 2) by pedal (not shown) along axial direction.(do not scheme with flow tube road 5 with stream container
Show) connection.The axial one end of piston 3 is arranged in additional confinement 9.The axial other end of piston 3 is arranged in primary seal portion 6
Portion, the primary seal portion 6 are fixed on piston 3 by means of magnet pin 7 and limit the pressure chamber 8 in master cylinder shell 2.In primary seal
It limits between portion 6 and additional confinement 9 with flow chamber 10.
Fig. 2 shows the main views of the piston main body 31 of piston according to prior art.Referring to Fig. 2, piston main body 31 exists
Its axial one end (close to the axial end portion of piston rod) has auxiliary sealed area 32.First flange 33 and the second flange 34 are set
The axial sides in auxiliary sealed area 32 are set, to prevent the additional confinement for being installed on the auxiliary sealed area 32 from (not scheming
Show) it is axially displaced.
In the design of piston main body 31 shown in Fig. 2, due to the presence of the first flange 33 and the second flange 34, manufacturing
When piston main body 31, the mold for manufacturing auxiliary sealed area 32 must include multiple points of moulds, be only capable of from radially demoulding, and
It cannot be demoulded from axial direction.Therefore, inevitably will form die parting line (convex epirelief) at auxiliary sealed area 32, mold with
Use when wearing, the radial height of die parting line will become larger.Die parting line can jack up additional confinement to radial outside, thus
Gap is formed between the outer peripheral surface of the auxiliary sealed area of piston main body 31 32 and the inner peripheral surface of additional confinement, which can
It can cause with the brake fluid leakage in flow chamber 10 (referring to Fig. 1).
Summary of the invention
The present invention is proposed to solve the above-mentioned problems, and the purpose of the present invention is to provide can prevent in additional confinement
Place occur brake fluid leakage for the piston of clutch release system master cylinder, the clutch release system master including the piston
The manufacturing method of the piston main body of cylinder and the piston.
A kind of piston for clutch release system master cylinder, the piston include piston main body, the piston main body packet
It includes and is located at the flange of its axial one end, positioned at the auxiliary sealed area of the axial other side of the flange,
Wherein, the piston main body further includes the locating slot positioned at the axial other side of the auxiliary sealed area, in institute
It states in the axial direction of piston main body, the auxiliary sealed area is limited between the flange and the locating slot, the auxiliary is close
The diameter for sealing region is greater than or equal to the part for being located at the axial other side of the auxiliary sealed area of the piston main body
Maximum gauge.
Preferably, the flange is more convex towards the radial outside of the piston main body than the periphery of the auxiliary sealed area
Out, the locating slot is more recessed towards the radially inner side of the piston main body than the periphery of the auxiliary sealed area.
Preferably, the piston further include be installed on the auxiliary sealed area additional confinement and be installed on it is described fixed
The locating piece of position slot, the locating piece are more convex towards the radial outside of the piston main body than the periphery of the auxiliary sealed area
Out, to carry out axial limiting to the additional confinement by the flange and the locating piece.
Optionally, the locating slot is formed as the annular groove extended on the complete cycle of the piston main body, the locating piece
For circular locating piece.
Optionally, the locating piece is made of rubber.
Optionally, the locating slot is formed as extending on the complete cycle of the piston main body, alternatively, the locating slot only exists
Partial region in the circumferential direction of the piston main body extends,
The locating piece is the locating piece of U or C-shaped.
Optionally, the locating piece is made of plastics or metal.
Preferably, the piston further includes the magnet for being located at the axial other side of the piston main body, primary seal portion, is utilized
The magnet pin being inserted into the axis hole of axial the other end of the piston main body installs the magnet and the primary seal portion
To the piston main body.
The present invention also provides a kind of clutch release system master cylinders comprising piston according to the present invention.
The present invention also provides a kind of manufacturing method of piston main body, the piston main body is the work of piston according to the present invention
Fill in main body, wherein the manufacturing method includes forming the piston main body using having the mold of circular inner peripheral surface
At least described auxiliary sealed area, wherein the axial direction along the piston main body demoulds the mold.
Of the invention for the piston of clutch release system master cylinder and the clutch release system master including the piston
In cylinder, due to limiting auxiliary sealed area between flange and locating slot, it is possible to cooperate via flange and with locating slot
Locating piece to carry out axial limiting to additional confinement.It is located at piston main body since the diameter of auxiliary sealed area is greater than or equal to
The maximum gauge of part of the axial other side of auxiliary sealed area therefore can use the inner peripheral surface that axially demoulds as circle
Cricoid single mold forms auxiliary sealed area, and this avoid the leakages of brake fluid caused by die parting line.
Detailed description of the invention
Fig. 1 shows a kind of axial, cross-sectional view of clutch release system master cylinder according to prior art.
Fig. 2 shows a kind of sides of the piston main body of the piston for clutch release system master cylinder according to prior art
View.
Fig. 3 A shows the work of the piston according to the first embodiment of the present invention for clutch release system master cylinder
Fill in the side view of main body.
Fig. 3 B shows the locating piece of piston according to first embodiment.
Fig. 3 C shows the axial, cross-sectional view of piston according to first embodiment.
Fig. 3 D shows the manufacturing method of the piston main body of piston according to first embodiment.
Fig. 4 A, 4B and 4C and Fig. 3 A, 3B, 3C similarly illustrate according to the second embodiment of the present invention for clutch
The piston of device separation system master cylinder.
Description of symbols
1 master cylinder；2 master cylinder shells；3 pistons；4 piston rods；5 with flow tube road；6 primary seal portions；7 magnet pins；8 pressure chambers；9 is auxiliary
Help sealing；10 with flow chamber；31 piston main bodies；32 auxiliary sealed areas；33 first flanges；34 second flanges；
300 pistons；310 piston main bodies；320 auxiliary sealed areas；330 flanges；350 locating slots；360 locating pieces；361,
362 arms；363 bottoms；370 additional confinements；380 magnet；390 primary seal portions；400 magnet pins；800 first molds；910,
920 second molds divide mould.
Specific embodiment
Exemplary embodiments of the present invention are described with reference to the accompanying drawings.It should be appreciated that these specific descriptions are only used for
How teaching those skilled in the art implement the present invention, rather than all feasible modes that exhaustion is of the invention, without in
It limits the scope of the invention.
First embodiment
First embodiment of the invention provides a kind of piston for clutch release system master cylinder.Extremely referring to Fig. 3 A
3C, the piston 300 include piston main body 310, which is generally cylindrical and can be molded single-piece
Structure.Piston main body 310 includes: the flange 330 positioned at its axial one end (piston rod mounting end)；Positioned at flange 330
The auxiliary sealed area 320 of the axial other side；And the locating slot 350 of the axial other side positioned at auxiliary sealed area 320.?
In the axial direction of piston main body 310, auxiliary sealed area 320 is limited between flange 330 and locating slot 350.
Similarly to the prior art, auxiliary sealed area 320 has circular outer surface, and flange 330 compares auxiliary seal
The appearance in region 320 is protruded towards radial outside.Differently with piston main body 31 shown in Fig. 2, instead of in piston main body 31
Second flange 34, it is more recessed towards radially inner side than the appearance of auxiliary sealed area 320 in the piston main body 310 of present embodiment
Form locating slot 350 with entering.
In the present embodiment, locating slot 350 is formed as the annular groove extended on the complete cycle of piston main body 310.Piston
300 further include locating piece 360, which is formed as circular.Preferably, but without limitation, locating piece 360 is by rubber
Glue elastomeric material is formed.When locating piece 360 is installed to locating slot 350, the radial inside portion of locating piece 360 is stuck in positioning
In slot 350, the radial outside portion of locating piece 360 is projected into the radial outside of the outer surface of auxiliary sealed area 320.Thus
Such as additional confinement 370 made of rubber is installed on auxiliary sealed area 320 and when locating piece 360 is installed on locating slot 350,
Flange 330 and locating piece 360 limit the axial movement of additional confinement 370.For example, when injecting brake fluid to master cylinder, meeting
With certain vacuum degree is generated in flow chamber 10 (referring to Fig. 1), locating piece 360 can prevent additional confinement 370 true at this time
The lower axial movement of sky.
Referring to the reference dotted line A1 and A2 in Fig. 3 A, it can be seen that in the piston main body 310 of present embodiment, flange is removed
Except 330, auxiliary sealed area 320 has maximum diameter D.In other words, piston main body 310 be located at auxiliary sealed area
The maximum gauge of the part of the 320 axial other side (primary seal portion side) is equal to or less than the diameter D of auxiliary sealed area 320.
Referring to Fig. 3 D, when forming piston main body 310 by molding, the first mold, which can be used, (can also be known as " sliding
Block ") 800 form the auxiliary sealed area 320 of piston main body 310.The inner peripheral surface of first mold 800 be annular shape, at
The outer peripheral surface of type auxiliary sealed area 320.As shown in the hollow arrow in Fig. 3 D, axis of first mold 800 along piston main body 310
To being demoulded, so that die parting line will not be formed in the outer peripheral surface of auxiliary sealed area 320, it can be to avoid due to auxiliary seal area
Gap is generated between the outer peripheral surface and additional confinement 370 in domain 320 and leads to the leakage of brake fluid.
The second mold can be used to form the axial other side positioned at auxiliary sealed area 320 of piston main body 310
Part.Second mold may include two points of moulds 910 and 920, as shown in the hollow arrow in Fig. 3 D, two points of moulds 910,
920 divide mould along the radial direction of piston main body 310, so as to be readily formed the various patterns on piston main body 310.
Referring to Fig. 3 C, the piston 300 of present embodiment further includes being installed to piston main body 310 for example, by interference fit
Magnet pin 400 in the axis hole of the axial other end.Magnet 380 and primary seal portion 390 are fixed to piston main body by magnet pin 400
The 310 axial other side.It is appreciated that the axial other side positioned at auxiliary sealed area 320 of piston main body 310 from Fig. 3 C
The diameter of part reduce and have no effect on the installation in primary seal portion 390 and magnet 380.
Second embodiment
Illustrate second embodiment according to the present invention referring to Fig. 4 A to 4C.
The same or similar appended drawing reference is marked for identical with first embodiment or similar component, and is omitted to this
The repeated explanation of a little components.
The difference of the second embodiment and above-mentioned first embodiment is, the locating slot 350 in second embodiment
Be formed as the structure cooperated with the locating piece 360 of U-shaped.Therefore, in one example, locating slot 350 can be formed as in piston
The radially away form one another of main body 310, two with the axially vertical straight trough of piston main body 310.Two straight troughs respectively with U
Two arms 361,362 of the locating piece 360 of shape cooperate.In another example, locating slot 350 can also include connection two
The curved slot of straight trough, the curved slot are used to cooperate with the bottom 363 of two arms 361,362 for the locating piece 360 for connecting U-shaped.
In the case where locating piece 360 is the locating piece of U-shaped, preferably but without limitation, had by plastics, metal etc.
Certain elasticity forms the U-shaped locating piece with rigid material.In this way, can be fixed in order to which the locating piece 360 of U-shaped to be installed to
Position slot 350, while the locating piece 360 of U-shaped being prevented to be detached from from locating slot 350.
Present embodiment can obtain the effect being similar with first embodiment, i.e., in molded auxiliary sealed area
When 320, mold can be demoulded along the axial direction of piston main body 310, thus will not be in the outer peripheral surface shape of auxiliary sealed area 320
At die parting line, can cause to avoid gap is generated between the outer peripheral surface due to auxiliary sealed area 320 and additional confinement 370
The leakage of brake fluid.
The present invention also provides the clutch release system master cylinder for including piston according to the present invention and the pistons of the piston
The manufacturing method of main body.
It should be appreciated that above embodiment is merely exemplary, it is not used in the limitation present invention.Those skilled in the art can be with
Various modifications and changes are made to above embodiment under the teachings of the present invention, without departing from the scope of the present invention.
(1) although not illustrating above, without limitation, piston main body 310 can be by such as glass fiber reinforcement
The plastic material of nylon (such as PA66-GF35) etc. is made.
(2) the first mold 800 shown in Fig. 3 D can be also used for being formed at least the one of the flange 330 of piston main body 310
Part.
(3) the circular locating piece 360 or the second in first embodiment can also be replaced using the locating piece of C-shaped
The locating piece 360 of U-shaped in embodiment.
(4) locating slot 350 is not limited to continuously extend on the complete cycle of piston main body 310, and locating slot 350 can also show
For the interrupted multiple recess portions for example spread in the circumferential direction of piston main body 310, multiple recess portion can be multiple with locating piece
To radially inner side it is outstanding it is raised be equipped with, to realize positioning of the locating piece in locating slot, and prevent locating piece along piston main body
Axial movement.
Claims (10)
1. a kind of piston for clutch release system master cylinder, the piston include piston main body, the piston main body includes
Positioned at the flange of its axial one end, positioned at the auxiliary sealed area of the axial other side of the flange,
It is characterized in that, the piston main body further includes the locating slot positioned at the axial other side of the auxiliary sealed area,
In the axial direction of the piston main body, the auxiliary sealed area, the auxiliary are limited between the flange and the locating slot
The diameter of sealing area is greater than or equal to the part of the axial other side positioned at the auxiliary sealed area of the piston main body
Maximum gauge.
2. piston according to claim 1, which is characterized in that the flange than the auxiliary sealed area periphery towards
The radial outside of the piston main body protrudes, the locating slot than the auxiliary sealed area periphery towards the piston main body
Radially inner side it is recessed.
3. piston according to claim 2, which is characterized in that the piston further includes being installed on the auxiliary sealed area
Additional confinement and be installed on the locating piece of the locating slot, the locating piece than the auxiliary sealed area periphery towards
The radial outside of the piston main body protrudes, to be carried out by the flange and the locating piece to the additional confinement axial
Limit.
4. piston according to claim 3, which is characterized in that the locating slot is formed as the complete cycle in the piston main body
The annular groove of upper extension, the locating piece are circular locating piece.
5. piston according to claim 4, which is characterized in that the locating piece is made of rubber.
6. piston according to claim 3, which is characterized in that the locating slot is formed as the complete cycle in the piston main body
Upper extension, alternatively, only the partial region in the circumferential direction of the piston main body extends the locating slot,
The locating piece is the locating piece of U or C-shaped.
7. piston according to claim 6, which is characterized in that the locating piece is made of plastics or metal.
8. piston according to any one of claim 1 to 7, which is characterized in that the piston further includes being located at the work
Magnet, the primary seal portion for filling in the axial other side of main body, utilize the axis hole of the axial the other end for being inserted into the piston main body
In magnet pin the magnet and the primary seal portion are installed to the piston main body.
9. a kind of clutch release system master cylinder, which is characterized in that the clutch release system master cylinder includes being wanted according to right
Piston described in asking any one of 1 to 8.
10. a kind of manufacturing method of piston main body, the piston main body is according to work described in any item of the claim 1 to 8
The piston main body of plug,
It is characterized in that, the manufacturing method includes forming the piston main body using having the mold of circular inner peripheral surface
At least described auxiliary sealed area, wherein the axial direction along the piston main body demoulds the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710565151.5A CN109253184B (en) | 2017-07-12 | 2017-07-12 | Piston, clutch release system master cylinder, and method for manufacturing piston body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710565151.5A CN109253184B (en) | 2017-07-12 | 2017-07-12 | Piston, clutch release system master cylinder, and method for manufacturing piston body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109253184A true CN109253184A (en) | 2019-01-22 |
| CN109253184B CN109253184B (en) | 2022-05-03 |
Family
ID=65050774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710565151.5A Active CN109253184B (en) | 2017-07-12 | 2017-07-12 | Piston, clutch release system master cylinder, and method for manufacturing piston body |
Country Status (1)
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| CN (1) | CN109253184B (en) |
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| AU1385783A (en) * | 1982-04-22 | 1983-10-27 | Federal Mogul Corporation | Hydraulic clutch piston and seal |
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|---|---|
| CN109253184B (en) | 2022-05-03 |
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