CN111674376A - Brake master cylinder - Google Patents
Brake master cylinder Download PDFInfo
- Publication number
- CN111674376A CN111674376A CN202010681764.7A CN202010681764A CN111674376A CN 111674376 A CN111674376 A CN 111674376A CN 202010681764 A CN202010681764 A CN 202010681764A CN 111674376 A CN111674376 A CN 111674376A
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- piston
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- air outlet
- hole
- air inlet
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- 238000007789 sealing Methods 0.000 claims abstract description 130
- 238000004891 communication Methods 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 230000003584 silencer Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 12
- 239000002775 capsule Substances 0.000 description 3
- 241000463219 Epitheca Species 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002026 carminative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The application relates to a master cylinder of a brake, which relates to the technical field of automobile accessories and comprises a shell, wherein a first air inlet hole, a second air inlet hole, a first air outlet hole and a second air outlet hole which are communicated with the inside of the shell are formed in the outer side of the shell; the first piston and the second piston are indirectly linked; the first valve body automatically resets, one side of the first valve body is linked with the first piston, and the other side of the first valve body is linked with the second piston; the second valve body is mutually linked with the second piston; the first sealing cavity comprises a first air inlet cavity and a first air outlet cavity, a first air inlet hole is communicated with the first air inlet cavity, and a first air outlet hole is communicated with the first air outlet cavity; the second sealing cavity is positioned between the first valve body and the second piston; and the communicating hole is arranged on the shell and communicates the first air inlet cavity and the second sealing cavity. This application has the effect that can reduce the application of force to brake pedal.
Description
Technical Field
The application relates to the field of auto parts, in particular to a master cylinder of a brake.
Background
At present, a master cylinder is generally used for a large automobile, the master cylinder is connected with a brake caliper and a pedal of the automobile, the master cylinder is driven to act through the action of a pedal plate, the brake caliper is driven to act through the action of the master cylinder, and the brake caliper compresses a friction sheet and a brake disc which are arranged on a hub to perform a braking action.
The publication number is CN103112446B discloses a brake pump for use in an automobile brake system, which includes a first piston body, a second piston body, a first valve body and a second valve body, wherein the first piston body is provided with a piston rod, a piston and a piston cylinder, the second piston body is provided with a second piston, the first valve body is arranged between the first piston body and the second piston body, the first valve body serves as the piston rod of the second piston body, the first piston body and the second piston body are respectively provided with a first piston shell and a second piston shell, the second piston shell serves as the piston cylinder of the second piston body, the upper end of the first piston body is connected with an upper cover, the upper cover is internally provided with a screw rod, the upper end face of the plug rod of the first piston body is sleeved with a piston sleeve, and the screw rod is pushed against the piston sleeve.
The prior art is similar to the brake pump, the upper end of the screw is connected with a brake pedal, and after the brake pedal is stepped, the screw moves downwards to drive the first piston body and the second piston body to move up and down, so that the air inlet and outlet of the vent valve are controlled, the brake caliper is driven to work, and the brake effect is achieved. Simple structure and safe use.
However, when the brake pedal is stepped on to drive the first piston body and the second piston body to move downwards, the elastic force of a spring at the lower end of the piston and the elastic force of a return spring in each of the first valve body and the second valve body need to be overcome, and in order to ensure that the springs can return to the proper position and the sealing effect, the springs generally have higher stiffness coefficient k, so that the brake pedal needs to be stepped on with larger force to push each piston to move.
Disclosure of Invention
In order to alleviate the power of stepping on to brake pedal, this application provides a brake master cylinder.
The application provides a master cylinder adopts following technical scheme: the method comprises the following steps:
the air conditioner comprises a shell, wherein a cavity is formed in the shell, and a first air inlet hole, a second air inlet hole, a first air outlet hole and a second air outlet hole which are communicated with the inside of the shell are formed in the outer side of the shell;
the first piston is arranged in one end of the shell in a sliding mode;
the second piston is arranged in the shell in a sliding mode, and the first piston and the second piston are indirectly linked;
the first valve body is automatically reset, the first valve body is arranged in the shell and positioned between the first piston and the second piston, one side of the first valve body is linked with the first piston, the other side of the first valve body is linked with the second piston, and the first valve body is used for controlling the mutual communication between the first air inlet hole and the first air outlet hole;
the second valve body is automatically reset, the second valve body is arranged in one end, far away from the first piston, of the shell, the second valve body is mutually linked with the second piston, and the second valve body is used for controlling the mutual communication between the second air inlet hole and the second air outlet hole;
the first sealing cavity is positioned between the first piston and the first valve body and comprises a first air inlet cavity and a first air outlet cavity, the first air inlet hole is communicated with the first air inlet cavity, the first air outlet hole is communicated with the first air outlet cavity, when the first valve body is opened, the first air inlet cavity is communicated with the first air outlet cavity, and when the first valve body is closed, the first air inlet cavity is separated from the first air outlet cavity;
a second sealed chamber between the first valve body and the second piston;
and the communication hole is arranged on the shell and is communicated with the first air inlet cavity and the second sealing cavity.
By adopting the technical scheme, when the brake pedal is stepped to drive the first piston to move in the shell, the first valve body is opened at the moment, and the first air outlet cavity is communicated with the first air inlet cavity; then, the air can be filled from the first air inlet hole and exhausted from the first air outlet hole, and the air can be used for braking the front wheel of the automobile; then the first valve body drives the second piston to move, the second valve body can be opened by the second piston, then the second air inlet hole is communicated with the second air outlet hole, and air is discharged from the second air outlet hole and can be used for braking of a rear wheel of an automobile; finally, the first valve body and the second valve body are automatically reset, so that the first air inlet cavity and the first air outlet cavity are separated, and the second air inlet hole and the second air outlet hole are also separated; simultaneously, when gaseous entering first intake chamber was interior, also had gaseous second seal chamber of following the intercommunicating pore entering, because the second valve position is between first valve body and second piston, consequently when promoting first piston motion at first intake chamber to when indirectly driving the second piston and moving, the gas that gets into the second seal chamber can promote the second piston and move towards the direction of opening the second valve body, and then plays the effect of helping hand, when the realization is moving in step with the driving piston, can reduce the effect to brake pedal's application of force.
Preferably, the air-conditioning valve further comprises a third sealed cavity, the third sealed cavity comprises a third air inlet cavity and a third air outlet cavity, the second air inlet hole is communicated with the third air inlet cavity, the second air outlet hole is communicated with the third air outlet cavity, the second valve body is arranged in the third air outlet cavity, when the second valve body is opened, the third air outlet cavity is communicated with the third air inlet cavity, and when the second valve body is closed, the third air outlet cavity is separated from the third air inlet cavity.
By adopting the technical scheme, when the second piston pushes the third valve body to be opened, the third air inlet cavity is communicated with the third air outlet cavity, and at the moment, the gas entering from the second air inlet hole can be discharged from the second air outlet hole.
Preferably, a separation sleeve is arranged between the first air outlet cavity and the third air inlet cavity in the shell, the second piston slides in the separation sleeve, and the second piston separates the second sealing cavity from the third sealing cavity.
Through adopting above-mentioned technical scheme, set up the spacer sleeve between first air cavity and the third air cavity of giving vent to anger, can be used for the connection that slides of piston, the week side of piston sleeve is sealed with the spacer sleeve simultaneously, can be used for separating the partition of second seal chamber and third seal chamber.
Preferably, first piston slides in first air inlet cavity, the junction of first air inlet cavity and first air outlet cavity is provided with first hole, first valve body is including sliding the first sealing ring that sets up in the first intracavity of giving vent to anger and setting up the first piece that resets on one side that first sealing ring is close to the second piston, works as when first piston promotes first sealing ring and removes, first hole is opened to first sealing ring.
By adopting the technical scheme, when the brake pedal is stepped to drive the first piston to move, the first piston can push the first sealing ring to move, so that the first hole is opened, and the first air inlet cavity is communicated with the first air outlet cavity; and then the compressed reset piece resets the first sealing ring, so that the first sealing ring continuously seals the first hole and the first valve body is automatically reset.
Preferably, the second piston slides in the third air inlet cavity, a second hole is formed in the joint of the third air inlet cavity and the third air outlet cavity, the second valve body comprises a second sealing ring which is arranged in the third air outlet cavity in a sliding mode and a second resetting piece which is arranged on one side, far away from the second piston, of the second sealing ring, the other side of the second resetting piece is abutted to the position, far away from the second hole, of the third air outlet cavity, and when the second piston pushes the second sealing ring to move, the second hole is opened by the second sealing ring.
By adopting the technical scheme, when the second piston is driven by the first valve body to move, the second sealing ring which originally seals the second hole is pushed into the position of the third air outlet cavity far away from the second hole, so that the third air inlet cavity is communicated with the third air outlet cavity; after the thrust to first piston is cancelled, the second piece that resets can drive the second sealing ring and continue to seal the second hole, realizes the automatic re-setting of second valve body. .
Preferably, the sealing element is arranged in the first air outlet cavity and close to one side of the second sealing cavity, and the sealing element is used for separating the first air outlet cavity from the second sealing cavity.
Through adopting above-mentioned technical scheme, through the sealing member, can be used for the separation between first gas cavity and the second seal chamber of giving vent to anger.
Preferably, a butting sleeve is arranged on one side, close to the second piston, of the first sealing ring, the other end of the butting sleeve is in butt joint with one side, close to the first air outlet cavity, of the second piston, and one side, close to the third sealing cavity, of the second piston is in butt joint with the second sealing ring.
Through adopting above-mentioned technical scheme, when first piston promoted first sealing ring and removed, drive the butt cover and remove, the butt cover promotes the second piston again and removes, and the second piston promotes the third sealing ring again at last and removes, realizes the synchronous linkage between first piston, the second valve body, second piston and the second valve body.
Preferably, an exhaust hole communicated with the outside of the shell is formed in the shell, the exhaust hole extends to the end face, close to the second valve body, of the shell from one face of the first sealing ring towards the first piston, the exhaust hole sequentially penetrates through the first sealing ring, the abutting sleeve, the second piston and the second sealing ring, the exhaust hole is communicated with the first air inlet cavity, and when the first piston abuts against the first sealing ring, the exhaust hole is separated from the first air inlet cavity.
Through adopting above-mentioned technical scheme, when first piston is when promoting first sealing ring, the exhaust hole is stopped up, after first piston withdrawed to the initial position, first sealing ring sealed first hole this moment, and the gas in the first air inlet chamber of being convenient for and the second sealed intracavity is carminative.
Preferably, a silencer is arranged on the air outlet of the exhaust hole outside the shell.
Through adopting above-mentioned technical scheme, when gas was arranged outside the casing from the exhaust hole, the muffler can reduce the volume when gas discharges, plays the effect of making an uproar of falling.
Preferably, the sealing member includes the solid fixed ring of cup jointing in the butt joint cover outside, sets up the first sealing washer on solid fixed ring inboard and sets up the second sealing washer on solid fixed ring outside, first sealing washer is sealed with the butt joint cover outer wall, the second sealing washer is sealed with the first intracavity wall of giving vent to anger.
Through adopting above-mentioned technical scheme, gu go up first sealing washer and second sealing washer and can realize that butt cover week side and first go out the sealed between the gas cavity, and then realize the separation in first gas cavity and the sealed chamber of second of giving vent to anger.
In summary, the present application includes at least one of the following beneficial technical effects:
(1) through the mutual linkage among the first piston, the first valve body, the second piston and the second valve body, the simultaneous air outlet of the first air outlet hole and the second air outlet hole can be realized, so that the braking effect on the automobile is realized;
(2) the communicating hole is arranged to communicate the first air inlet cavity with the second sealing cavity, so that the effect of assisting the second piston to move towards the direction of opening the second valve body is achieved, and the effect of reducing the force applied to the brake pedal when the driving piston moves synchronously is achieved;
(3) through the arrangement of the exhaust hole, when the first piston returns to the initial position, the exhaust hole is communicated with the first air inlet cavity and the second sealing cavity, so that air in the first air inlet cavity and the second sealing cavity can be conveniently exhausted; meanwhile, the silencer can reduce the noise when the gas is discharged from the exhaust hole.
Drawings
FIG. 1 is a front view of a master cylinder for a brake in this embodiment;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is an exploded view of the master cylinder of the present embodiment;
FIG. 5 is a cross-sectional view of C-C of FIG. 4;
fig. 6 is a schematic view of the internal structure of the lower case.
Description of reference numerals: 1. a housing; 2. a first piston; 3. a second piston; 4. a first valve body; 41. a first seal ring; 42. a first reset member; 5. a second valve body; 51. a second seal ring; 52. a second reset member; 6. an upper shell; 7. a lower case; 8. a cover; 9. a first air intake hole; 10. a first air outlet hole; 11. a second air outlet; 12. a second air intake hole; 13. a first sealed chamber; 131. a first air intake chamber; 132. a first air outlet cavity; 14. a second sealed chamber; 15. a third sealed chamber; 151. a third air inlet cavity; 152. a third air outlet cavity; 16. a return spring; 17. a separation sleeve; 18. a seal member; 181. a fixing ring; 182. a first seal ring; 183. a second seal ring; 19. a communicating hole; 20. a first hole; 21. a second hole; 22. a butting sleeve; 23. an exhaust hole; 24. a muffler; 25. a cylinder; 26. a third seal ring; 27. a fourth seal ring; 28. and a retainer ring.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses a brake master cylinder. Referring to fig. 1 and 2, the master cylinder includes a housing 1, a first piston 2, a second piston 3, a first valve body 4, and a second valve body 5. The first piston 2 drives the first valve body 4 to move and open when moving, the first valve body 4 drives the second piston 3 to move when opening, and finally the second piston 3 opens the second valve body 5 again, so that mutual linkage between the piston and the valve body is realized.
The inside of casing 1 is the cavity, and casing 1 is including epitheca 6 and inferior valve 7 of connecting from top to bottom, and the upper end bolted lock of casing 1 has lid 8, and the lower extreme seals the setting, and epitheca 6 also locks through bolt and nut subassembly with inferior valve 7. In addition, a first air inlet hole 9 and a first air outlet hole 10 communicated with the inside of the housing 1 are provided on the outside of the upper case 6, and a second air outlet hole 11 and a second air inlet hole 12 communicated with the inside of the housing 1 are provided on the outside of the lower case 7.
As shown in fig. 3, 5 and 6, a first seal cavity 13, a second seal cavity 14 and a third seal cavity 15 are sequentially arranged in the housing 1 from top to bottom. A first capsule 13 and a second capsule 14 are located in the upper shell 6 and a third capsule 15 is located in the lower shell 7. The first sealed chamber 13 comprises a first inlet chamber 131 close to the lid 8 and a first outlet chamber 132, the first outlet chamber 132 is located below the first inlet chamber 131, and the diameter of the first outlet chamber 132 is smaller than that of the first inlet chamber 131. The first inlet hole 9 communicates with the inside of the first inlet chamber 131, and the first outlet hole 10 communicates with the inside of the first outlet chamber 132. The third sealing cavity 15 includes a third air inlet cavity 151 and a third air outlet cavity 152, the third air inlet cavity 151 is located above the third air outlet cavity 152, the third air outlet cavity 152 is smaller than the diameter of the third air inlet cavity 151, the second air inlet hole 12 is communicated with the third air inlet cavity 151, and the second air outlet hole 11 is communicated with the third air outlet cavity 152.
The first piston 2 is slidably disposed in the first air inlet chamber 131, the first piston 2 can be connected with a brake pedal (not shown in the figure), and the first piston 2 is automatically reset through the reset spring 16. An annular separating sleeve 17 is arranged between the first air outlet cavity 132 and the third air inlet cavity 151 in the shell 1, and the diameter of the separating sleeve 17 is larger than that of the first air outlet cavity 132 and smaller than that of the third air outlet cavity 152; the second piston 3 slides in the separating sleeve 17, and the second piston 3 is used for separating the second sealed cavity 14 and the third sealed cavity 15. In addition, a sealing member 18 is provided in the first outlet chamber 132 on a side close to the second seal chamber 14, and the sealing member 18 is used to separate the first outlet chamber 132 and the second seal chamber 14. And a communication hole 19 for communicating the first intake chamber 131 and the second seal chamber 14 is formed in the upper case 6.
The first valve body 4 is arranged in the first air outlet cavity 132, a first hole 20 is arranged at the joint of the first air inlet cavity 131 and the first air outlet cavity 132, the first valve body 4 comprises a first sealing ring 41 which is arranged in the first air outlet cavity 132 in a sliding manner, and a first resetting piece 42 which is arranged on one side of the first sealing ring 41 close to the second piston 3; the first reset piece 42 can select a spring, and the spring is always in a compressed state, so that one side of the first sealing ring 41 close to the first piston 2 is close to and seals the first hole 20; when the first piston 2 moves and pushes the first sealing ring 41 to move towards the second piston 3, the first sealing ring 41 opens the first hole 20, so that the first air inlet cavity 131 is communicated with the first air outlet cavity 132, and then the air entering from the first air inlet hole 9 can be discharged from the first air outlet hole 10 for braking the automobile. At this time, the gas in the first gas inlet chamber 131 enters the second seal chamber 14 from the communication hole 19 to push the second piston 3. And when the first piston 2 resets, the first resetting piece 42 also drives the first sealing ring 41 to continuously seal the first hole 20, so that the first valve body 4 controls the communication and the separation of the first air inlet cavity 131 and the first air outlet cavity 132, and further controls the communication and the separation between the first air inlet hole 9 and the first air outlet hole 10 and the automatic resetting of the first valve body 4.
The second valve body 5 is arranged in the third air outlet cavity 152, a second hole 21 is formed at the joint of the third air inlet cavity 151 and the third air outlet cavity 152, and the second valve body 5 comprises a second sealing ring 51 which is arranged in the third air outlet cavity 152 in a sliding manner and a second resetting piece 52 which is arranged on one side of the second sealing ring 51 far away from the second piston 3; the second reset piece 52 can be selected as a spring, and one side of the second reset piece 52 away from the second sealing ring 51 is abutted with the position of the third air outlet cavity 152 away from the second hole 21; the second return element 52 is always in compression, so that the second sealing ring 51 can tightly seal the second hole 21; when the second piston 3 moves downwards, one side of the second piston 3 close to the second sealing ring 51 pushes the second sealing ring 51 to move in the third air outlet cavity 152, the second reset piece 52 is compressed continuously, the second hole 21 is opened at the moment, the third air inlet cavity 151 is communicated with the third air outlet cavity 152, namely the second air inlet hole 12 is communicated with the second air outlet hole 11, and air entering from the second air inlet hole 12 can be discharged from the second air outlet hole 11 and used for braking an automobile; the communication between the third air inlet cavity 151 and the third air outlet cavity 152 is controlled, and the second valve body 5 is automatically reset.
As shown in fig. 2, the abutting sleeve 22 is fixed on one side of the first sealing ring 41 close to the second piston 3, the first resetting piece 42 is sleeved outside the abutting sleeve 22, and the other end of the abutting sleeve 22 abuts against one side of the second piston 3 close to the first air outlet cavity 132; when the first sealing ring 41 is pushed by the first piston 2, the abutting sleeve 22 is driven to move, and the abutting sleeve 22 pushes the second piston 3 to move.
As shown in fig. 4 and 5, the sealing element 18 includes a fixing ring 181 sleeved on the outer side of the abutting sleeve 22, a first sealing ring 182 embedded on the inner side of the fixing ring 181, and a second sealing ring 183 embedded on the outer side of the fixing ring 181, the first sealing ring 182 seals with the outer wall of the abutting sleeve 22, and the second sealing ring 183 seals with the inner wall of the first air outlet cavity 132, so as to separate the first air outlet cavity 132 from the second sealing cavity 14.
As shown in fig. 2 and 5, an exhaust hole 23 communicated with the outside of the housing 1 is formed in the housing 1, the exhaust hole 23 extends from one surface of the first sealing ring 41 facing the first piston 2 to an end surface of the housing 1 close to the second valve body 5, and the exhaust hole 23 sequentially penetrates through the inside of the first sealing ring 41, an inner cavity of the abutting sleeve 22, the center position of the second piston 3 and the second sealing ring 51 and is finally exhausted from one end of the lower shell 7 close to the third air outlet cavity 152; when the first piston 2 is at the initial position, a gap is formed between one side of the first piston 2 close to the first sealing ring 41 and the first sealing ring 41, and the exhaust hole 23 is communicated with the first air inlet cavity 131; when the first piston 2 abuts against the first seal ring 41, the exhaust hole 23 is separated from the first intake chamber 131, preventing gas from being discharged from the exhaust hole 23 during brake ventilation; therefore, after the first piston 2 is reset, the gas in the first seal cavity 13, the second seal cavity 14 and the third seal cavity 15 is partially discharged.
As shown in fig. 2, 4 and 5, a silencer 24 is attached to the outlet of the exhaust hole 23 outside the lower case 7, and can reduce noise when the gas is discharged. And a cylinder 25 inserted in the abutting sleeve 22 is integrally formed on one side of the second piston 3 close to the first air outlet cavity 132, the cylinder 25 extends to the other side of the piston and abuts against the second sealing ring 51, and a through hole is formed in the cylinder 25, wherein two ends of the through hole are respectively communicated with the abutting sleeve 22 and the second sealing ring 51, so that the third air inlet cavity 151 and the exhaust hole 23 are separated. Further, a third seal ring 26 is fitted to the outer wall of the column 25 to prevent gas from escaping from the gap between the column 25 and the abutment sleeve 22.
Similarly, in order to realize the separation between the third air outlet cavity 152 and the air outlet hole 23 and the separation of the air outlet hole 23 between the lower shell 7 and the third air outlet cavity 152, the abutting sleeve 22, the fixing ring 181, the first sealing ring 182 and the second sealing ring 183 which are embedded on the inner side and the outer side of the fixing ring 181 are also arranged in the third air outlet cavity 152; one side of the abutting sleeve 22 close to the second hole 21 is fixedly connected with the second sealing ring 51, and both the abutting sleeve 22 and the second sealing ring 51 are arranged in the third air outlet cavity 152 in a sliding manner; the outer side of the first sealing ring 182 in the third air outlet cavity 152 is connected with the outer wall of the abutting sleeve 22 in a sealing manner, the second sealing ring 183 is connected with the inner wall of the third air outlet cavity 152 in a sealing manner, and the inner hole of the abutting sleeve 22 in the third air outlet cavity 152 is communicated with the air outlet of the exhaust hole 23; and the second sealing ring 51, the abutment sleeve 22, the second restoring member 52 and the fixing ring 181 in the third air outlet cavity 152 are also fixed by the retainer ring 28.
And all inlay on the outer wall of first piston 2 and second piston 3 and be equipped with fourth sealing washer 27, fourth sealing washer 27 all is provided with at least one along its direction of height, selects to be two in this scheme, guarantees the leakproofness of first piston 2 and first chamber 131 inner walls of admitting air to and the leakproofness of second piston 3 and separation cover 17 inner wall.
The implementation principle of XXX in the embodiment of the present application is as follows: when the brake pedal is stepped on, one side of the first piston 2 is driven to be tightly abutted and sealed with one side of the first sealing ring 41, then the first sealing ring 41 is pushed to move towards the direction of the second piston 3, and meanwhile, compressed air starts to be introduced into the first air inlet hole 9 and the second air inlet hole 12; then, the first hole 20 which is originally sealed is opened, at the moment, the first air inlet cavity 131 is communicated with the first air outlet cavity 132, and the gas is discharged from the first air outlet hole 10 and can be used for braking the front wheel of the automobile. Then, the abutting sleeve 22 is pushed together with the first sealing ring 41, so that the other end of the abutting sleeve 22 drives the second piston 3 to slide in the separating sleeve 17, and then the cylinder 25 on the side of the second piston 3 close to the second sealing ring 51 pushes the second sealing ring 51 to slide in the third air outlet cavity 152, so that the second hole 21 is opened, and therefore the third air inlet cavity 151 and the third air outlet cavity 152 are also communicated, so that the air entering from the second air inlet hole 12 can be discharged from the second air outlet hole 11, and the brake device can be used for braking a front wheel or a rear wheel of the automobile.
When the brake pedal is not stepped on, the return spring 16 drives the first piston 2 to return, the first return element 42 drives the first sealing ring 41 to continuously seal the first hole 20, the second return element drives the second sealing ring 51 to continuously seal the second hole 21, and the gas in the first sealing cavity 13 and the gas in the second sealing cavity 14 are exhausted from the exhaust hole 23.
When gas enters the first gas inlet cavity 131, the gas enters the second sealing cavity 14 from the communication hole 19, namely enters the abutting sleeve 22, and then pushes the second piston 3 to move towards the direction of pushing the second sealing ring 51, so that the effect of assisting the force is achieved, and when the driving piston moves synchronously, the effect of reducing the force applied to the brake pedal can be achieved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A master cylinder, comprising:
the air conditioner comprises a shell (1), wherein a cavity is formed in the shell (1), and a first air inlet hole (9), a second air inlet hole (12), a first air outlet hole (10) and a second air outlet hole (11) which are communicated with the interior of the shell (1) are formed in the outer side of the shell (1);
the first piston (2), the said first piston (2) is slipped and set up in one end of the body (1);
the second piston (3), the second piston (3) is arranged in the shell (1) in a sliding mode, and the first piston (2) and the second piston (3) are indirectly linked;
the first valve body (4) is automatically reset, the first valve body (4) is arranged in the shell (1) and is positioned between the first piston (2) and the second piston (3), one side of the first valve body (4) is linked with the first piston (2), the other side of the first valve body (4) is linked with the second piston (3), and the first valve body (4) is used for controlling the mutual communication between the first air inlet hole (9) and the first air outlet hole (10);
the second valve body (5) is also automatically reset, the second valve body (5) is arranged in one end, far away from the first piston (2), of the shell (1), the second valve body (5) is mutually linked with the second piston (3), and the second valve body (5) is used for controlling the mutual communication between the second air inlet hole (12) and the second air outlet hole (11);
the first sealing cavity (13) is positioned between the first piston (2) and the first valve body (4), the first sealing cavity (13) comprises a first air inlet cavity (131) and a first air outlet cavity (132), the first air inlet hole (9) is communicated with the first air inlet cavity (131), the first air outlet hole (10) is communicated with the first air outlet cavity (132), the first air inlet cavity (131) is communicated with the first air outlet cavity (132) when the first valve body (4) is opened, and the first air inlet cavity (131) is separated from the first air outlet cavity (132) when the first valve body (4) is closed;
a second sealed chamber (14), the second sealed chamber (14) being located between the first valve body (4) and the second piston (3);
and the communication hole (19), the communication hole (19) is arranged on the shell, and the communication hole (19) is communicated with the first air inlet cavity (131) and the second sealing cavity (14).
2. The master cylinder of claim 1, wherein: the novel air inlet valve is characterized by further comprising a third sealing cavity (15), wherein the third sealing cavity (15) comprises a third air inlet cavity (151) and a third air outlet cavity (152), the second air inlet hole (12) is communicated with the third air inlet cavity (151), the second air outlet hole (11) is communicated with the third air outlet cavity (152), the second valve body (5) is arranged in the third air outlet cavity (152), when the second valve body (5) is opened, the third air outlet cavity (152) is communicated with the third air inlet cavity (151), and when the second valve body (5) is closed, the third air outlet cavity (152) is separated from the third air inlet cavity (151).
3. The master cylinder of claim 1, wherein: a separation sleeve (17) is arranged between the first air outlet cavity (132) and the third air inlet cavity (151) in the shell (1), the second piston (3) slides in the separation sleeve (17), and the second piston (3) separates a second sealing cavity (14) and a third sealing cavity (15).
4. The master cylinder of claim 1, wherein: first piston (2) slide in first air inlet chamber (131), the junction of first air inlet chamber (131) and first air outlet chamber (132) is provided with first hole (20), first valve body (4) including slide set up in first air outlet chamber (132) first sealing ring (41) and set up first piece (42) that resets on one side that first sealing ring (41) are close to second piston (3), work as when first piston (2) promote first sealing ring (41) and move, first hole (20) are opened to first sealing ring (41).
5. The master cylinder of claim 1, wherein: the second piston (3) slides in third air inlet cavity (151), the junction of third air inlet cavity (151) and third air outlet cavity (152) is provided with second hole (21), second valve body (5) including slide setting second sealing ring (51) in third air outlet cavity (152) and set up second reset piece (52) on second sealing ring (51) keep away from one side of second piston (3), the opposite side of second reset piece (52) and third air outlet cavity (152) keep away from the position butt in second hole (21), work as when second piston (3) promote second sealing ring (51) and remove, second hole (21) are opened in second sealing ring (51).
6. The master cylinder of claim 1, wherein: and a sealing element (18) is arranged in the first air outlet cavity (132) and close to one side of the second sealing cavity (14), and the sealing element (18) is used for separating the first air outlet cavity (132) and the second sealing cavity (14).
7. The master cylinder of claim 1, wherein: the first sealing ring (41) is provided with a butting sleeve (22) on one side close to the second piston (3), the other end of the butting sleeve (22) is abutted against one side, close to the first air outlet cavity (132), of the second piston (3), and one side, close to the third sealing cavity (15), of the second piston (3) is abutted against the second sealing ring (51).
8. The master cylinder of claim 1, wherein: be provided with in the casing (1) and lead to the outside exhaust hole (23) of casing (1), exhaust hole (23) extend to casing (1) on being close to the terminal surface of second valve body (5) from first sealing ring (41) towards first piston (2) one side, exhaust hole (23) pass first sealing ring (41), butt cover (22), second piston (3) and second sealing ring (51) in proper order, exhaust hole (23) and first air inlet chamber (131) intercommunication, when first piston (2) and first sealing ring (41) butt, exhaust hole (23) and first air inlet chamber (131) are separated.
9. The master cylinder of claim 1, wherein: a silencer (24) is arranged on the air outlet of the exhaust hole (23) outside the shell (1).
10. The master cylinder of claim 1, wherein: sealing member (18) including cup joint solid fixed ring (181) in the butt joint cover (22) outside, set up first sealing washer (182) on solid fixed ring (181) inboard and set up second sealing washer (183) on solid fixed ring (181) outside, first sealing washer (182) are sealed with butt joint cover (22) outer wall, second sealing washer (183) are sealed with first play air cavity (132) inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010681764.7A CN111674376B (en) | 2020-07-15 | 2020-07-15 | Brake master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010681764.7A CN111674376B (en) | 2020-07-15 | 2020-07-15 | Brake master cylinder |
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| Publication Number | Publication Date |
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| CN111674376A true CN111674376A (en) | 2020-09-18 |
| CN111674376B CN111674376B (en) | 2024-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010681764.7A Active CN111674376B (en) | 2020-07-15 | 2020-07-15 | Brake master cylinder |
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| CN (1) | CN111674376B (en) |
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| CN101028815A (en) * | 2006-09-30 | 2007-09-05 | 田青锋 | Two-stage electromagnetic booster braking general pump of three-inlet and multi-exit |
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| CN103112446A (en) * | 2013-02-02 | 2013-05-22 | 徐志伟 | Braking brake pump |
| KR20140082490A (en) * | 2012-12-24 | 2014-07-02 | 주식회사 만도 | Master cylinder for brake system |
| CN103994163A (en) * | 2014-05-20 | 2014-08-20 | 山东海工机械有限公司 | Hydraulic anti-lock brake wheel cylinder and braking system |
| CN212423073U (en) * | 2020-07-15 | 2021-01-29 | 漳浦县伟发汽车配件制造有限公司 | Brake master cylinder |
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2020
- 2020-07-15 CN CN202010681764.7A patent/CN111674376B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101028815A (en) * | 2006-09-30 | 2007-09-05 | 田青锋 | Two-stage electromagnetic booster braking general pump of three-inlet and multi-exit |
| CN202827549U (en) * | 2012-10-28 | 2013-03-27 | 陈槐 | Brake master pump capable of automatically switching light load and heavy load |
| KR20140082490A (en) * | 2012-12-24 | 2014-07-02 | 주식회사 만도 | Master cylinder for brake system |
| CN103112446A (en) * | 2013-02-02 | 2013-05-22 | 徐志伟 | Braking brake pump |
| CN103994163A (en) * | 2014-05-20 | 2014-08-20 | 山东海工机械有限公司 | Hydraulic anti-lock brake wheel cylinder and braking system |
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| CN212423073U (en) * | 2020-07-15 | 2021-01-29 | 漳浦县伟发汽车配件制造有限公司 | Brake master cylinder |
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| Publication number | Publication date |
|---|---|
| CN111674376B (en) | 2024-07-12 |
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