CN109281953A - One-piece sealing device for clutch master cylinder and clutch master cylinder - Google Patents
One-piece sealing device for clutch master cylinder and clutch master cylinder Download PDFInfo
- Publication number
- CN109281953A CN109281953A CN201710589346.3A CN201710589346A CN109281953A CN 109281953 A CN109281953 A CN 109281953A CN 201710589346 A CN201710589346 A CN 201710589346A CN 109281953 A CN109281953 A CN 109281953A
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- Prior art keywords
- sealing
- sealing device
- master cylinder
- skeleton
- clutch master
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- 238000007789 sealing Methods 0.000 title claims abstract description 320
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 41
- 238000003466 welding Methods 0.000 claims description 50
- 230000002093 peripheral effect Effects 0.000 claims description 49
- 239000000463 material Substances 0.000 claims description 23
- 239000013589 supplement Substances 0.000 claims description 22
- 210000000988 bone and bone Anatomy 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract 2
- 230000001502 supplementing effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The invention provides a one-piece sealing device for a clutch master cylinder and the clutch master cylinder. The sealing device is used for sealing at least a pressure chamber at an opening of a hydraulic oil supplementing channel of the clutch master cylinder, which is close to the piston. The sealing device includes: a plurality of sealing portions; and a skeleton connecting the plurality of sealing portions. The seal device is generally annular in shape as a whole, and one or more passage holes that communicate the radially outer side and the radially inner side of the seal device are formed in the seal device. In the sealing device of the invention, the framework connects a plurality of sealing parts (sealing lips and/or sealing rings) to form a single-piece sealing device which has compact structure, is beneficial to the miniaturization of the clutch main cylinder, is beneficial to the simplification of the assembly of the clutch main cylinder and reduces the production cost.
Description
Technical field
The invention belongs to the clutch release systems in Vehicle Engineering, in particular to are used for the piston of clutch release system
The sealing technique of sealing.
Background technique
Fig. 1 shows a kind of local axial cross section of known clutch master cylinder 10.The clutch master cylinder 10 includes shell
Body 1, piston 2, the welding ring 3 between shell 1 and piston 2.It is formed with pressure chamber 11 in shell 1 and hydraulic oil supplement is logical
Road 12.The opening of the close piston 2 in hydraulic oil supplement channel 12 is provided with seal assembly 4.Seal assembly 4 is by along clutch
Primary seal independent of each other 41, secondary seal 43 and the intermediate ring 42 of the axial A arrangement of master cylinder 10 form.Primary seal 41 is negative
Duty under running conditions be responsible on pedal direction by sealed pressure room 11, intermediate 42 supports primary seal 41 of ring, secondary seal 43
Sealing.
As shown in the axial, cross-sectional view of Fig. 1, in order to be positioned to secondary seal 43, the close seal assembly 4 of welding ring 3
One end be formed as circular step portion 31 (big small diameter portion), secondary seal 43 is located in the outer peripheral surface of the stage portion 31 and piston 2
Between.It is also formed with the circular step portion 13 (big small diameter portion) for being positioned to intermediate ring 42 in the inner peripheral surface of shell 1, is led to
The stage portion 13 of the stage portion 31 and shell 1 of crossing welding ring 3 limits the axial position of intermediate ring 42.Shell 1, which is also formed with, to be used for
To the circular protrusion 14 that primary seal 41 is positioned, circular protrusion 14 is extend into the annular recessed portion of primary seal 41.
The seal assembly 4 is made of three components, this can waste big quantity space, leads to the shell of bigger clutch master cylinder
Diameter, and increase cost.The seal assembly 4 of three components composition is but also assembling process is more complicated.
Summary of the invention
In view of above-mentioned problems of the prior art, the purpose of the present invention is to provide a kind of for clutch master cylinder
Single-piece sealing device and clutch master cylinder including the sealing device.
A kind of single-piece sealing device for clutch master cylinder is used to supplement in the hydraulic oil of the clutch master cylinder
The opening of the close piston in channel at least sealed pressure room, wherein the sealing device includes:
Multiple sealings；And
Skeleton, the skeleton connect the multiple sealing,
Wherein, the sealing device is in substantially a ring-shaped on the whole, and is formed in the sealing device by the sealing
One or more access openings that the radial outside of device is connected to radially inner side.
In at least one embodiment, the skeleton has an axial cross section of substantially U-shaped, and the sealing is from described
Skeleton extends out.
In at least one embodiment, the sealing device be installed to the clutch master cylinder shell and piston it
Between when, first chamber is formed between the outer peripheral surface of the sealing device and the inner peripheral surface of the shell, in the sealing device
Inner peripheral surface and the piston outer peripheral surface between form second chamber, the first chamber and the second chamber are via described
One or more access openings communicate with each other.
In at least one embodiment, one or more of access openings are formed in the skeleton.
In at least one embodiment, one or more of access openings are formed in the skeleton and form the sealing
The material in portion.
In at least one embodiment, the sealing device includes: the outside stretched out from the axial side of the skeleton
Primary seal portion and inside primary seal portion；And it is close from the outside time sealing of the axial other side of skeleton stretching and inside time
Envelope portion.
In at least one embodiment, the base end part in outside primary seal portion and inside primary seal portion connects each other
It is adhered to the skeleton continuously, the distal portion in outside primary seal portion and inside primary seal portion is divided each other radially
It opens, the outside time sealing and the inside time sealing are separated from each other.
In at least one embodiment, the sealing device be installed to the clutch master cylinder shell and piston it
Between when, in the axial cross section of the clutch master cylinder, the opening of the U-shaped structure of the skeleton is towards the clutch master cylinder
Welding ring opening, the outside time sealing forms close with the shell of the clutch master cylinder and the end face of the welding ring
Envelope, the end face of the piston and the welding ring of the inside time sealing and the clutch master cylinder, which is formed, to be sealed.
In at least one embodiment, the skeleton includes bottom and stretches out from the bottom towards the welding ring
First arm and the second arm, one or more of access openings are formed in first arm and described second of the skeleton
Arm.
In at least one embodiment, in the axial cross section of the clutch master cylinder, the U-shaped structure of the skeleton
Opening height be greater than the U-shaped structure bottom height.
In at least one embodiment, the outside time sealing includes: and is formed to seal with the inner peripheral surface of the shell
Sealing lip；And the sealing ring of sealing is formed with the end face of the welding ring.
In at least one embodiment, the outside time sealing include simultaneously with the inner peripheral surface of the shell and described
The end face of welding ring forms the sealing ring of sealing.
In at least one embodiment, the inside time sealing includes: and is formed to seal with the outer peripheral surface of the piston
Sealing lip；And the sealing ring of sealing is formed with the end face of the welding ring.
In at least one embodiment, the sealing device be installed to the clutch master cylinder shell and piston it
Between when, in the axial cross section of the clutch master cylinder, the opening of the U-shaped structure of the skeleton is towards the sealing device
The shell of radial outside opening, the outside time sealing and the clutch master cylinder, which is formed, to be sealed, the inside time sealing
It is formed and is sealed with the piston of the clutch master cylinder.
In at least one embodiment, the skeleton includes bottom and from the bottom towards the diameter of the sealing device
The first arm and the second arm stretched out outward, outside primary seal portion and inside primary seal portion are from first arm
Portion extends out, the end face of welding ring of second arm against the clutch master cylinder.
In at least one embodiment, one or more of access openings are formed in the bottom of the skeleton.
In at least one embodiment, in the axial cross section of the clutch master cylinder, the bottom and described first
The connecting portion of arm is located at the radial outside of the connecting portion of the skeleton and second arm.
In at least one embodiment, the outside time sealing is inner peripheral surface and the welding positioned at the shell
The sealing ring in gap between the outer peripheral surface of ring, the inside time sealing are to form sealing with the outer peripheral surface of the piston
Sealing lip.
In at least one embodiment, the sealing device be installed to the clutch master cylinder shell and piston it
Between when, in the axial cross section of the clutch master cylinder, the opening of the U-shaped structure of the skeleton is towards the sealing device
The shell of radially inner side opening, the outside time sealing and the clutch master cylinder, which is formed, to be sealed, the inside time sealing
It is formed and is sealed with the piston of the clutch master cylinder.
In at least one embodiment, the outside time sealing is the sealing ring that radial section is D font, described interior
Side time sealing is the sealing lip obliquely extended towards the pressure chamber.
In at least one embodiment, the skeleton includes: the axially extending bottom approximately along the sealing device
Portion；And the first arm and the second arm stretched out from the bottom towards the radially inner side of the sealing device,
One or more of access openings are formed in the bottom of the skeleton and form the material of the sealing.
In at least one embodiment, the material for forming the sealing coats the second arm of the skeleton and is formed
The flat end of the axial other side of the sealing device.
In at least one embodiment, inside primary seal portion is from the skeleton towards the pressure chamber and described
The sealing lip that piston extends, outside primary seal portion are from the skeleton towards the diameter of the pressure chamber and the sealing device
The sealing lip extended outward.
In at least one embodiment, it is substantially not provided with forming the material of the sealing in the inside of the skeleton
Material.
In at least one embodiment, the material for forming the sealing surrounds the skeleton.
The present invention also provides a kind of clutch master cylinder, the clutch master cylinder includes sealing device according to the present invention, institute
State sealing device the opening of close the piston in hydraulic oil supplement channel be arranged in the shell of the clutch master cylinder with
Between piston.
In at least one embodiment, in addition to the hydraulic oil supplements channel, the shell is filled with the sealing
It sets corresponding inner peripheral surface and is formed as flat surface, the end face in face of the sealing device of the welding ring of the clutch master cylinder also shape
As flat surface.
In sealing device of the invention, by multiple sealings, (sealing in the application includes sealing lip and close to skeleton
Seal ring) it connects, so as to form single-piece sealing device, the single-piece sealing device structure is compact, is conducive to clutch
The miniaturization of master cylinder, and be conducive to simplify the assembling of clutch master cylinder, it reduces and generates cost.
Detailed description of the invention
Fig. 1 shows a kind of local axial cross section of known clutch master cylinder.
Fig. 2A shows the local axial cross section of clutch master cylinder according to the first embodiment of the present invention.
Fig. 2 B shows the enlarged drawing of the part near the sealing device in Fig. 2A.
Fig. 3 A shows the partial axial section enlarged drawing of clutch master cylinder according to the second embodiment of the present invention.
Fig. 3 B shows the perspective view that the axial direction of the sealing device of the clutch master cylinder in Fig. 3 A is splitted.
Fig. 4 shows the partial axial section enlarged drawing of clutch master cylinder according to the third embodiment of the present invention.
Fig. 5 shows the axial sectional view of the sealing device of clutch master cylinder according to the fourth embodiment of the present invention.
Description of symbols
1 shell；2 pistons；3 welding rings；31 circular step portions；4 seal assemblies；41 primary seals；42 intermediate rings；43 times close
Sealing；10 clutch master cylinders；11 pressure chambers；12 hydraulic oil supplement channel；13 circular step portions；14 circular protrusions；A is axial；R diameter
To；
100 clutch master cylinders；21 annular steps；32 end faces；401 outside primary seal lips；402 inside primary seal lips；403
Outside time sealing lip；404 inside time sealing lips；405,407,409,410 outer side seal ring；406 inner seal rings；420 skeletons；
421 first passage holes；422 second channel holes；423 third channel holes；424 fourth lane holes；425 bottoms；426 first arms；
427 second arms；The distal portion of 428 first arms；The distal portion of 429 second arms；C1 first chamber；C2 second chamber.
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.
Clutch master cylinder 100 of the invention can have the structure similar with clutch master cylinder 10 shown in Fig. 1, to
The similar component of component in Fig. 1 marks identical appended drawing reference, and omits the repeated explanation to these components.
Clutch master cylinder 100 axially and radially with piston 2 axially and radially and sealing device axially and radially
Unanimously, therefore, in the following description, axial A can refer to the axial direction of clutch master cylinder 100, the axial direction of piston 2 and sealing device
Axial direction, radial R can refer to the radial direction of the radial direction of clutch master cylinder 100, the radial direction of piston 2 and sealing device.In the following, for letter
Change explanation, 11 side of pressure chamber is known as axial side, 3 side of welding ring is known as the axial other side.
First embodiment
Referring to Fig. 2A, the clutch master cylinder 100 of first embodiment includes shell 1, piston 2 and welding ring 3.In shell 1
Inside it is formed with pressure chamber 11 and hydraulic oil supplement channel 12.In the opening setting of the close piston 2 in hydraulic oil supplement channel 12
There is single-piece sealing device.
Sealing device is in substantially a ring-shaped on the whole.Sealing device around the setting of the periphery of piston 2 piston 2 and shell 1 it
Between.It is limited by the end face 32 of the axial other side of the direction of shell 1 circular protrusion 14 stretched out and the axial side of direction of welding ring 3
The axial position of sealing device.
Referring to Fig. 2A and Fig. 2 B, sealing device includes that (sealing in the application includes sealing lip and close to multiple sealings
Seal ring) and a skeleton 420 connecting multiple sealing.Sealing is bonded on skeleton 420,420 shape of skeleton
At a component of sealing device.
Skeleton 420 can be the annular component that axial cross section is substantially U-shaped.The axial cross section referring to shown in Fig. 2 B, bone
Frame 420 includes: the bottom 425 extended approximately along the radial R of clutch master cylinder 100；From bottom 425 towards the end of welding ring 3
The first arm 426 and the second arm 427 that face 32 extends.One is respectively formed on the first arm 426 and the second arm 427
Or multiple first passage holes 421 and one or more second channels hole 422.Skeleton 420 can be by metal or plastics (preferably hard
Plastics) etc. materials formed, in the conceived case, skeleton 420 can be made in a manner of casting or punching press etc..
The hardness for forming the material of sealing is less than the hardness for forming the material of skeleton.Sealing can by rubber and/or
The materials such as PTFE are formed.For example, sealing can be adhered to by bonding by Vulcanization in sealing situation formed of rubber
On skeleton 420.Sealing includes that outside primary seal lip 401, inside primary seal lip 402, outside time sealing lip 403, inside time are close
Seal lip 404.Sealing can also include outer side seal ring 405 and inner seal ring 406.
Outside primary seal lip 401 extends from the bottom of skeleton 420 425 towards pressure chamber 11 and radial outside, thus and shell
The inner peripheral surface of body 1 forms contact sealing.Inside primary seal lip 402 is inside from the bottom of skeleton 420 425 towards pressure chamber 11 and diameter
Side extends, to contact sealing with the formation of the outer peripheral surface of piston 2.Distal portion of the outside time sealing lip 403 from the first arm 426
428 extend and contact sealing with the formation of the inner peripheral surface of shell 1.Distal portion 429 of the inside time sealing lip 404 from the second arm 427
Extend and contacts sealing with the formation of the outer peripheral surface of piston 2.Outer side seal ring 405 extends simultaneously from the distal portion 428 of the first arm 426
It is formed with the end face 32 of welding ring 3 and contacts sealing.Inner seal ring 406 from the distal portion 429 of the second arm 427 extend and with weldering
The end face 32 for connecing ring 3 forms contact sealing.
The distal portion of outside primary seal lip 401 and the distal portion of inside primary seal lip 402 are separated from each other on radial R, from
And annular recess is formd between them, the annular projection 14 of shell 1 is extend into the annular recess, thus in axial side
Limit the axial position of sealing device.Outer side seal ring 405 and inner seal ring 406 are contacted with the end face 32 of welding ring 3, thus
The axial position of sealing device is limited in the axial other side.
The distal portion 428 of first arm 426 is to radial outside crimp, so that time sealing lip 403 and outside are close on the outside of increasing
The bond area of seal ring 405 and distal portion 428 improves adhesive strength.The distal portion 429 of second arm 427 is curved to radially inner side
Adhesive strength is improved to increase the bond area of inside time sealing lip 404 and inner seal ring 406 and distal portion 429 in side.
The base end part of outside primary seal lip 401 and the base end part (part of 425 side of bottom) of inside primary seal lip 402 are each other
Continuously be adhered to the bottom 425 of skeleton 420, it is thus possible to improve outside primary seal lip 401 and inside primary seal lip 402 with
The adhesive strength of skeleton 420.Outside time sealing lip 403 and outer side seal ring 405 can be continuous each other, can further prevent in this way
Only outside time sealing lip 403 and outer side seal ring 405 are removed from skeleton 420.Similarly, inside time sealing lip 404 and inside are close
Seal ring 406 can be continuous each other, can further prevent inside time sealing lip 404 and inner seal ring 406 from skeleton 420 in this way
Removing.
Since axially A is mobile for the meeting of piston 2, it can be by inside primary seal lip 402 and inside time sealing lip 404
It is considered as dynamic sealing lip.The inside primary seal lip 402 contacted with piston 2 is for the hydraulic oil in sealed pressure room 11.Inside time
Sealing lip 404 and inside primary seal lip 402 are contacted with piston 2, thus inside time sealing lip 404, inside primary seal lip 402,
The second chamber C2 for storing hydraulic oil is formed between second arm 427 and piston 2, the hydraulic oil in second chamber C2 is used for
Lubrication inside time sealing lip 404 and inside primary seal lip 402.Second chamber C2 is connected to second channel hole 422.
Due to sealing device relative to shell 1 and welding ring 3 be it is static, can by outside primary seal lip 401,
Outside time sealing lip 403, outer side seal ring 405 and inner seal ring 406 are considered as static sealing portion.The outside contacted with shell 1
Primary seal lip 401 is for the hydraulic oil in sealed pressure room 11.Outside primary seal lip 401 and outside time sealing lip 403 and shell 1
Contact, so that primary seal lip 401, outside time form first chamber between sealing lip 403, the first arm 426 and shell 1 on the outside
C1, first chamber C1 are connected to first passage hole 421 and hydraulic oil supplement channel 12.
Hydraulic oil from hydraulic oil supplement channel 12 can be via first chamber C1, first passage hole 421, the first arm
426 and second annular space between arm 427, second channel hole 422 flow into second chamber C2.The piston main body of piston 2
Annular step 21 is formed with towards one end of pressure chamber 11.When piston 2 move along axial A so that inside primary seal lip 402 into
When entering annular step 21, the hydraulic oil in second chamber C2 can be with feed pressure room 11.
The outer side seal ring 405 and inner seal ring 406 contacted with the end face 32 of welding ring 3 is prevented as static sealing portion
Hydraulic oil leaks.
The sealing device of present embodiment can be by dynamic sealing lip, static sealing lip and static sealing ring (static sealing
Portion) it is integrated on a component (skeleton 420), three components of the known seal component in Fig. 1 are in this way by this list
Part formula sealing device replaces, this can save big quantity space and cost, and the step of also can be reduced assembling process.
Skeleton 420 provides support for each sealing, and under high pressure, power is transferred to welding ring 3 from sealing, and skeleton 420 is helped
Help support sealing.Access opening be connected to the single-piece sealing device radial outside and radially inner side and allow compensate hydraulic oil.
In this embodiment, the 32 place end of end face of welding ring 3 does not re-form the stage portion (step in comparative diagram 1
Portion 31), the inner peripheral surface corresponding with sealing device of shell 1 need not also re-form stage portion (stage portion 13 in comparative diagram 1).This
Sample simplifies the structure of welding ring 3 and shell 1, reduces the diameter of clutch master cylinder.Thus present embodiments provide for a kind of tight
Gather the clutch master cylinder sealing device of type.
Skeleton 420 is formed to have the axial cross section of substantially U-shaped.The hatch frame of U-shaped makes two 426 Hes of arm
Distance (especially the distance between distal portion 428 and 429) can suitably adjust or change between 427, increase sealing dress
The adaptability set.Sealing is set in the distal portion 428 of the first arm 426 and the distal portion 429 of the second arm 427 respectively, if
The sealing for being placed in distal portion 428 is separated from each other with the sealing for being set to distal portion 429, can reduce to form sealing in this way
Material (for example, rubber and/or PTFE etc.) dosage, reduce production cost.It is substantially not provided with using in the inside of skeleton 420
In the material for forming sealing, therefore, it is possible to reduce material utilization amount.
Referring to Fig.1, hydraulic oil supplements channel 12 at the annular step 31 of welding ring 3 towards seal assembly 4 and welding
Ring 3 is open, thus, hydraulic oil is easy the gap between the inner peripheral surface of shell 1 and the outer peripheral surface of annular step 31 towards Fig. 1
In right side leakage.It is then desired to which welding ring 3 and shell 1 weld to prevent hydraulic fluid leak to the outside of clutch master cylinder 10.
In the present embodiment, outside time sealing lip 403, outer side seal ring 405 are close hydraulic oil supplement channel 12
The axial other side of the opening of piston 2 forms with the end face 32 of the inner peripheral surface of shell 1 and welding ring and contacts sealing, thus can have
It prevents hydraulic oil from leaking into the outside of clutch master cylinder 100 between shell 1 and welding ring 3 to effect, and then can be omitted shell 1
Welding between welding ring 3.In the present embodiment, fast inserting structure can be used in shell 1 and welding ring 3, utilizes elastic claw
It is fastened togather with hole or recess.In this way, simplifying the installation process of shell 1 and welding ring 3.
It can also be seen that outside primary seal lip 401 supplements the close piston 2 in channel 12 in hydraulic oil from Fig. 2A and Fig. 2 B
The inner peripheral surface formation of axial side and shell 1 of opening contact sealing.The diameter or width direction in hydraulic oil supplement channel 12
Hydraulic oil fills the open side reduction for mending the close piston 2 in channel 12, thus, sealing device needs only to have lesser axial dimension
Can sealing fluid pressure oil supplement channel 12 close piston 2 opening axial sides, thus, this is conducive to sealing device
Miniaturization.
Second embodiment
Illustrate second embodiment of the present invention referring to Fig. 3 A and Fig. 3 B, for identical with first embodiment or phase
As component mark identical appended drawing reference, and omit the repeated explanation to these components.The second embodiment party is mainly explained below
The difference of formula and first embodiment.
Because outside can be used almost without pressure in the hydraulic oil in first chamber C1 in this second embodiment
Sealing ring 407 replaces outside in first embodiment time sealing lip 403 and outer side seal ring 405.The outer side seal ring 407
Extend from the distal portion 428 of the first arm 426 to radial outside, and outer side seal ring 407 includes being located at distal end on axial A
The part of the axial side (that is, left side in Fig. 3 A) in portion 428 and the portion for being located at the axial other side (that is, right side in Fig. 3 A)
Point.In this way, outer side seal ring 407 contacts sealing with the formation of the inner peripheral surface of shell 1, meanwhile, outer side seal ring 407 is gone back and welding ring
3 end face 32 forms contact sealing, to prevent hydraulic oil from leaking from welding ring 3.
Optionally, other than inside primary seal lip 402, all other sealing lips can be replaced by sealing ring.
It is generally understood that the sealing effect of sealing lip has directionality, and the directionality of the sealing effect of sealing ring is substantial
There is no directionality less than the directionality of the sealing effect of sealing lip or the sealing effect of sealing ring.With such as inside primary seal
For lip 402, since inside primary seal lip 402 is from the bottom of skeleton 420 425 towards 2 side of piston (radially inner side) and pressure chamber
11 sides (axial side) extend, thus, 11 side of pressure chamber is inside primary seal lip 402 by sealed sides.In other words, in a certain pressure
Under power, hydraulic oil easily can flow into 11 side of pressure chamber from the side second chamber C2 by inside primary seal lip 402, and in the pressure
Under power, hydraulic oil is less likely to pass through the inside inflow of primary seal lip 402 side second chamber C2 from 11 side of pressure chamber.And sealing ring
The sealing effect of the axial sides of 407 pairs of sealing rings 407 is roughly equal.
Second embodiment can obtain effect similar with first embodiment.In addition, due to using outer side seal ring
407 replace outside in the first embodiment time sealing lip 403 and outer side seal ring 405 therefore to simplify sealing device
Structure can reduce production cost.
Third embodiment
Illustrate third embodiment of the present invention referring to Fig. 4, for the same or similar portion of second embodiment
Part marks identical appended drawing reference, and omits the repeated explanation to these components.Third embodiment and the is mainly explained below
The difference of two embodiments.
Referring to Fig. 4, sealing device includes multiple sealings and the skeleton 420 that connects multiple sealing.Skeleton
420 can be the annular component that axial cross section is substantially U-shaped.With the skeleton in first embodiment and second embodiment
420 are open difference towards end face 32, and in the third embodiment, the substantially U-shaped structure of the axial cross section of skeleton 420 is towards diameter
Outside side opening is open towards the inner peripheral surface of shell 1.Skeleton 420 includes: to prolong approximately along the axial A of clutch master cylinder 100
The bottom 425 stretched；The first arm 426 and the second arm 427 extended from bottom 425 towards radial outside.It is formed in bottom 425
There are one or more third channel holes 423.
Sealing includes outside primary seal lip 401, inside primary seal lip 402, outer side seal ring 409, inside time sealing lip
404。
Outside primary seal lip 401 extends from the distal portion 428 of the first arm 426 towards 11 side of pressure chamber and radial outside,
To contact sealing with the formation of the inner peripheral surface of shell 1.Inside primary seal lip 402 is from one between the first arm 426 and bottom 425
A corner extends towards 11 side of pressure chamber and radially inner side, to contact sealing with the formation of the outer peripheral surface of piston 2.Outer seal ring
409 extend from the distal portion 429 of the second arm 427 and contact sealing with the formation of the inner peripheral surface of shell 1.Inside time sealing lip 404
Extend from another adjacent corner of the bottom of skeleton 420 425 and contacts sealing with the formation of the outer peripheral surface of piston 2.The annular of shell 1
Protrusion 14 reaches in the annular recess between outside primary seal lip 401 and inside primary seal lip 402, to limit in axial side
The axial position of sealing device.The end face 32 of second arm 427 and welding ring 3 is against to limit sealing in the axial other side
The axial position of device.
The distal portion 428 of first arm 426 side crimp in the axial direction, to increase outside primary seal lip 401 and distal portion
428 bond area improves adhesive strength.The distal portion 429 of second arm 427 other side crimp in the axial direction, to increase outer
The bond area of side seal ring 409 and distal portion 429 improves adhesive strength.
First chamber C1 is formed between skeleton 420 and the inner peripheral surface of shell 1, first chamber C1 and hydraulic oil supplement channel
12 connections.Inside time sealing lip 404, inside primary seal lip 402, skeleton 420 bottom 425 and piston 2 between formed and be used for
The second chamber C2 of hydraulic oil is stored, the hydraulic oil in second chamber C2 is close for lubricating inside time sealing lip 404 and inside master
Seal lip 402.Second chamber C2 is connected to third channel hole 423.
In the present embodiment, bottom 425 is arranged with respect to axial A inclination, thus in 426 side of the first arm away from piston
2 outer peripheral surface is and smaller in outer peripheral surface distance of 427 side of the second arm away from piston 2 apart from larger.Pass through this structure, a side
The formation of above-mentioned second chamber C2 is convenient in face, on the other hand obliquely extends towards 2 side of piston convenient for inside primary seal lip 402,
It realizes sealing effect, and can reduce the distance of outer peripheral surface of the corner away from piston 2 between bottom 425 and the second arm 427,
Reduce the length of inside time sealing lip 404.
Hydraulic oil from hydraulic oil supplement channel 12 can be via first chamber C1, third channel hole 423, second chamber
The 21 feed pressure room 11 C2 and annular step.
Third embodiment can obtain effect similar with first embodiment and second embodiment, but can subtract
The quantity of access opening in small skeleton 420 and the quantity for reducing sealing, reduce the cost of sealing device.
4th embodiment
Illustrate the 4th embodiment of the invention referring to Fig. 5, for identical with first embodiment or similar portion
Part marks identical appended drawing reference, and omits the repeated explanation to these components.The 4th embodiment and the is mainly explained below
The difference of one embodiment.
The sealing device of present embodiment can be used for the clutch master cylinder in first embodiment.The sealing device is also
Single-piece sealing device comprising skeleton 420 and multiple sealings.Skeleton 420 can be wrapped completely by the material of formation sealing
It encloses.The sealing device of present embodiment can be formed by encapsulated injection molding.
Skeleton 420 can be the annular component that axial cross section is substantially U-shaped.In the axial cross section of skeleton 420, skeleton
420 include: the bottom 425 that A extends generally along an axial；The first arm 426 extended from bottom 425 towards radially inner side and
Two arms 427.
Sealing includes outside primary seal lip 401, inside primary seal lip 402, outer side seal ring 410, inside time sealing lip
404。
Outside primary seal lip 401 extends from skeleton 420 towards 11 side of pressure chamber, to be formed with the inner peripheral surface of shell 1 close
Envelope.Inside primary seal lip 402 extends from skeleton 420 towards 11 side of pressure chamber and radially inner side, thus the outer peripheral surface shape with piston 2
It is sealed at contact.Outer side seal ring 410 extends from skeleton 420 towards radial outside and contacts with the formation of the inner peripheral surface of shell 1 close
Envelope.Inside time sealing lip 404 extends from skeleton 420 towards 11 side of pressure chamber and radially inner side and is formed with the outer peripheral surface of piston 2
Contact sealing.
The distal portion of outside primary seal lip 401 and the distal portion of inside primary seal lip 402 separate on radial R, thus
Annular recess is formd between them, the annular projection 14 of shell 1 is extend into the annular recess, to limit in axial side
The axial position of sealing device.The end face of the axial other side of sealing device is shaped generally as flat surface, the flat surface and welding
The end face 32 of ring 3 contacts, to limit the axial position of sealing device in the axial other side.
As shown in the axial cross section in Fig. 5, outer side seal ring 410 is formed as the close of the D font that radial outer side is arch
Envelope portion.Since outer side seal ring 410 is more prominent to radial outside than the other parts of sealing device, in the outer of sealing device
It can be formed between circumferential surface, the inner peripheral surface of shell 1 and outer side seal ring 410 similar with the first chamber C1 in first embodiment
First chamber C1.First chamber C1 is connected to hydraulic oil supplement channel 12.In addition, being formed in sealing device in radial direction
Upper multiple fourth lane holes 424 through sealing device.Fourth lane hole 424 is connected to first chamber C1.
Hydraulic oil from hydraulic oil supplement channel 12 can be via first chamber C1, fourth lane hole 424, second chamber
The 21 feed pressure room 11 C2 and annular step.
4th embodiment can obtain and above-mentioned first to the similar effect of third embodiment.Implement the 4th
In mode, the material due to forming sealing surrounds skeleton 420 completely, it is possible to set the radial thickness of entire sealing device
That sets is smaller, to further decrease the diameter of clutch master cylinder.In addition, the sealing device shape of present embodiment is simpler
It is single, therefore the sealing device can be formed with simpler mold.
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) in the above-described embodiment, skeleton 420 has the axial cross section of substantially U-shaped, however, the present invention is not limited to
This.For example, skeleton 420 can have substantially rectangular axial cross section.
(2) opening direction of the U-shaped structure of skeleton 420 is not limited to above embodiment.For example, real first and second
It applies in mode, can also be side (11 side of pressure chamber) in the axial direction opening by U-shaped structure setting.However, first and second
In the structure of embodiment, inside primary seal lip 402 extends from bottom 425, can increase the sealing for being mainly used for pressure chamber 11
Inside primary seal lip 402 bond area, improve adhesive strength.
It can also be to be open to radially inner side by U-shaped structure setting, and the 4th for example, in the third embodiment
It can also be to be open to radial outside by U-shaped structure setting in embodiment.
(3) in the fourth embodiment, the material for forming sealing need not surround entire skeleton 420.For example, skeleton 420
Radial outside globally or locally can be not provided with forming the material of sealing.
(4) position of access opening is not limited to position shown in above embodiment.For example, sealing can formed
One or more access openings are formed in material (for example, the base end part of primary seal lip 401 and inside primary seal lip 402 on the outside).
However, in contrast to this, formation access opening is simpler easy in skeleton 420, production cost can be reduced.
(5) in this application, the inner peripheral surface corresponding with sealing device of shell 1 is formed as flat surface and refers to, shell 1 with it is close
Seal apparatus contact or opposite part do not form step (i.e. big small diameter portion).Axial cross section of the flat surface in clutch master cylinder
In it is linearly.
In this application, the welding ring 3 of clutch master cylinder is formed as flat surface in face of the end face of sealing device 32 and refers to,
Between shell 1 and piston 2, welding ring 3 does not have step in face of the end face of sealing device 32, and the flat surface is in clutch master cylinder
Axial cross section in it is linearly.
Claims (27)
1. a kind of single-piece sealing device for clutch master cylinder is used for logical in the hydraulic oil supplement of the clutch master cylinder
The opening of the close piston in road at least sealed pressure room, which is characterized in that the sealing device includes:
Multiple sealings；And
Skeleton, the skeleton connect the multiple sealing,
Wherein, the sealing device is in substantially a ring-shaped on the whole, and is formed in the sealing device by the sealing device
One or more access openings for being connected to radially inner side of radial outside.
2. sealing device according to claim 1, which is characterized in that the skeleton has the axial cross section of substantially U-shaped,
The sealing is extended out from the skeleton.
3. sealing device according to claim 1, which is characterized in that be installed to the clutch master in the sealing device
When between the shell and piston of cylinder, the first chamber is formed between the outer peripheral surface of the sealing device and the inner peripheral surface of the shell
Room forms second chamber, the first chamber and institute between the inner peripheral surface of the sealing device and the outer peripheral surface of the piston
Second chamber is stated to communicate with each other via one or more of access openings.
4. sealing device according to claim 1, which is characterized in that one or more of access openings are formed in the bone
Frame.
5. sealing device according to claim 1, which is characterized in that one or more of access openings are formed in the bone
Frame and the material for forming the sealing.
6. sealing device according to claim 2, which is characterized in that the sealing device includes: the axis from the skeleton
The outside primary seal portion and inside primary seal portion stretched out to side；And the outside time stretched out from the axial other side of the skeleton
Sealing and inside time sealing.
7. sealing device according to claim 6, which is characterized in that outside primary seal portion and the inside primary seal
The base end part in portion is continuously adhered to the skeleton, the distal portion in outside primary seal portion and inside primary seal portion
It is separated from each other radially, the outside time sealing and the inside time sealing are separated from each other.
8. sealing device according to claim 6, which is characterized in that be installed to the clutch master in the sealing device
When between the shell and piston of cylinder, in the axial cross section of the clutch master cylinder, the opening court of the U-shaped structure of the skeleton
It is open to the welding ring of the clutch master cylinder, the shell and the welding of the outside time sealing and the clutch master cylinder
The end face of ring forms sealing, and the inside time sealing is formed with the piston of the clutch master cylinder and the end face of the welding ring
Sealing.
9. sealing device according to claim 8, which is characterized in that the skeleton includes bottom and from the bottom direction
The first arm and the second arm that the welding ring is stretched out, one or more of access openings are formed in described the of the skeleton
One arm and second arm.
10. sealing device according to claim 8, which is characterized in that in the axial cross section of the clutch master cylinder, institute
State the opening of the U-shaped structure of skeleton height be greater than the U-shaped structure bottom height.
11. sealing device according to claim 8, which is characterized in that the outside time sealing includes: and the shell
Inner peripheral surface formed sealing sealing lip；And the sealing ring of sealing is formed with the end face of the welding ring.
12. sealing device according to claim 8, which is characterized in that the outside time sealing include simultaneously with it is described
The end face of the inner peripheral surface of shell and the welding ring forms the sealing ring of sealing.
13. sealing device according to claim 8, which is characterized in that the inside time sealing includes: and the piston
Outer peripheral surface formed sealing sealing lip；And the sealing ring of sealing is formed with the end face of the welding ring.
14. sealing device according to claim 6, which is characterized in that be installed to the clutch in the sealing device
When between the shell and piston of master cylinder, in the axial cross section of the clutch master cylinder, the opening of the U-shaped structure of the skeleton
It is open towards the radial outside of the sealing device, the shell of the outside time sealing and the clutch master cylinder forms close
The piston of envelope, the inside time sealing and the clutch master cylinder, which is formed, to be sealed.
15. sealing device according to claim 14, which is characterized in that the skeleton includes bottom and from the bottom court
The first arm and the second arm stretched out to the radial outside of the sealing device, outside primary seal portion and the inside master
Sealing is extended out from first arm, the end face of welding ring of second arm against the clutch master cylinder.
16. sealing device according to claim 15, which is characterized in that one or more of access openings are formed in described
The bottom of skeleton.
17. sealing device according to claim 15, which is characterized in that in the axial cross section of the clutch master cylinder,
The diameter that the connecting portion of the bottom and first arm is located at the skeleton and the connecting portion of second arm is outside
Side.
18. sealing device according to claim 15, which is characterized in that the outside time sealing is positioned at the shell
Inner peripheral surface and the welding ring outer peripheral surface between gap in sealing ring, the inside time sealing is and the piston
Outer peripheral surface formed sealing sealing lip.
19. sealing device according to claim 6, which is characterized in that be installed to the clutch in the sealing device
When between the shell and piston of master cylinder, in the axial cross section of the clutch master cylinder, the opening of the U-shaped structure of the skeleton
It is open towards the radially inner side of the sealing device, the shell of the outside time sealing and the clutch master cylinder forms close
The piston of envelope, the inside time sealing and the clutch master cylinder, which is formed, to be sealed.
20. sealing device according to claim 19, which is characterized in that it is D that the outside time sealing, which is radial section,
The sealing ring of font, the inside time sealing is the sealing lip obliquely extended towards the pressure chamber.
21. sealing device according to claim 19, which is characterized in that the skeleton includes: approximately along the sealing
The axially extending bottom of device；And from the bottom towards the radially inner side of the sealing device stretch out the first arm and
Second arm,
One or more of access openings are formed in the bottom of the skeleton and form the material of the sealing.
22. sealing device according to claim 19, which is characterized in that the material for forming the sealing coats the bone
Second arm of frame and formed the sealing device the axial other side flat end.
23. sealing device according to claim 6, which is characterized in that inside primary seal portion is from the skeleton court
The sealing lip extended to the pressure chamber and the piston, outside primary seal portion are from the skeleton towards the pressure chamber
The sealing lip extended with the radial outside of the sealing device.
24. according to claim 1 to sealing device described in any one of 23, which is characterized in that in the inside base of the skeleton
It is not provided with forming the material of the sealing in sheet.
25. according to claim 1 to sealing device described in any one of 23, which is characterized in that form the material of the sealing
Material surrounds the skeleton.
26. a kind of clutch master cylinder, which is characterized in that the clutch master cylinder includes described in any one of claim 1 to 25
Sealing device, the sealing device the hydraulic oil supplement channel close piston opening setting in the clutch
Between the shell and piston of master cylinder.
27. clutch master cylinder according to claim 26, which is characterized in that in addition to the hydraulic oil supplements channel, institute
The inner peripheral surface corresponding with the sealing device for stating shell is formed as flat surface, and the welding ring of the clutch master cylinder faces institute
The end face for stating sealing device is again formed as flat surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710589346.3A CN109281953B (en) | 2017-07-19 | 2017-07-19 | One-piece sealing device for clutch master cylinder and clutch master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710589346.3A CN109281953B (en) | 2017-07-19 | 2017-07-19 | One-piece sealing device for clutch master cylinder and clutch master cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109281953A true CN109281953A (en) | 2019-01-29 |
| CN109281953B CN109281953B (en) | 2021-12-10 |
Family
ID=65184262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710589346.3A Active CN109281953B (en) | 2017-07-19 | 2017-07-19 | One-piece sealing device for clutch master cylinder and clutch master cylinder |
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| Country | Link |
|---|---|
| CN (1) | CN109281953B (en) |
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| GB1412310A (en) * | 1972-02-22 | 1975-11-05 | Bosch Gmbh Robert | Sleeve seals and pistons |
| EP0235568A2 (en) * | 1986-02-06 | 1987-09-09 | Busak + Luyken GmbH & Co. | Dual-lip wiper arrangement |
| CN87215206U (en) * | 1987-12-23 | 1988-09-07 | 蔡道清 | V-sealing ring having fine sealing function |
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| CN101553675A (en) * | 2006-12-06 | 2009-10-07 | Nok株式会社 | Packing and sealing system |
| CN203822741U (en) * | 2014-03-12 | 2014-09-10 | 湖南协力液压有限公司 | Sealing structure of pumping cylinder rod |
| CN104936839A (en) * | 2013-01-31 | 2015-09-23 | 日立汽车***株式会社 | Master cylinder |
| CN204942521U (en) * | 2015-06-30 | 2016-01-06 | 浙江飞挺机械有限公司 | A kind of oil cylinder piston |
| US9599226B2 (en) * | 2013-06-04 | 2017-03-21 | Seal Engineering As | Pressure released wiper assembly for a sealing arrangement |
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- 2017-07-19 CN CN201710589346.3A patent/CN109281953B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1412310A (en) * | 1972-02-22 | 1975-11-05 | Bosch Gmbh Robert | Sleeve seals and pistons |
| EP0235568A2 (en) * | 1986-02-06 | 1987-09-09 | Busak + Luyken GmbH & Co. | Dual-lip wiper arrangement |
| CN87215206U (en) * | 1987-12-23 | 1988-09-07 | 蔡道清 | V-sealing ring having fine sealing function |
| CN2615406Y (en) * | 2003-04-29 | 2004-05-12 | 天津特***压股份有限公司 | Piston type single-action damper hydraulic cylinder |
| CN101553675A (en) * | 2006-12-06 | 2009-10-07 | Nok株式会社 | Packing and sealing system |
| CN104936839A (en) * | 2013-01-31 | 2015-09-23 | 日立汽车***株式会社 | Master cylinder |
| US9599226B2 (en) * | 2013-06-04 | 2017-03-21 | Seal Engineering As | Pressure released wiper assembly for a sealing arrangement |
| CN203822741U (en) * | 2014-03-12 | 2014-09-10 | 湖南协力液压有限公司 | Sealing structure of pumping cylinder rod |
| CN204942521U (en) * | 2015-06-30 | 2016-01-06 | 浙江飞挺机械有限公司 | A kind of oil cylinder piston |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109281953B (en) | 2021-12-10 |
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