CN211449449U - Normally closed wet brake for compensating piston stroke - Google Patents
Normally closed wet brake for compensating piston stroke Download PDFInfo
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- CN211449449U CN211449449U CN201922342190.6U CN201922342190U CN211449449U CN 211449449 U CN211449449 U CN 211449449U CN 201922342190 U CN201922342190 U CN 201922342190U CN 211449449 U CN211449449 U CN 211449449U
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- brake
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- normally closed
- piston stroke
- wet
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Abstract
The utility model belongs to the technical field of brakes, in particular to a normally closed wet brake for compensating piston stroke, which comprises a wheel hub and an oil seal seat sleeved on the wheel hub, wherein a brake shell is sleeved outside the oil seal seat, the oil seal seat is fixedly connected with the brake shell, a wet type brake device is installed between the brake shell and the wheel hub, a piston is arranged on one side, away from the oil seal seat, of the wet type brake device, an axial annular seal cavity is formed between the piston and the brake shell, a connecting disc is arranged on one side, away from the wet type brake device, of the piston, the connecting disc is axially fixed with the brake shell, a pressing plate is arranged between the piston and the connecting disc, an elastic element is arranged between the pressing plate and the piston, an adjusting bolt is arranged on the outer side of the connecting disc, the adjusting bolt extends into the inner side of the connecting disc from the outer side of the connecting disc to be in close contact with the pressing plate, and an oil. The piston stroke and the braking torque can be compensated.
Description
Technical Field
The utility model belongs to the technical field of the stopper, concretely relates to normal close formula wet brake of compensation piston stroke.
Background
The national requirements for coal mine machinery are more and more strict, for example, a dry brake is prohibited from entering a well, the length and the height of a vehicle are limited, the safety of coal mine operation is ensured, and meanwhile, the requirement for a normally closed wet brake also comes up.
Disclosure of Invention
In order to overcome the shortcomings of the prior art, the utility model provides a normally closed wet brake for compensating piston stroke, which can compensate piston stroke and braking torque.
The utility model discloses a realize through following technical scheme: a normally closed wet brake for compensating the stroke of piston is composed of a hub, an oil seal seat sleeved on said hub, a braking casing sleeved outside said oil seal seat, the oil seal seat is fixedly connected with the brake shell, a wet type brake device is arranged between the brake shell and the wheel hub, a piston is arranged on one side of the wet type brake device far away from the oil seal seat, an axial annular seal cavity is formed between the piston and the brake shell, a coupling disc is arranged on one side of the piston, which is far away from the wet type braking device, the coupling disc is axially fixed with the braking shell, a pressure plate is arranged between the piston and the connecting disc, an elastic element is arranged between the pressure plate and the piston, the outer side of the connecting disc is provided with an adjusting bolt, the adjusting bolt extends into the inner side of the connecting disc from the outer side of the connecting disc to be in close contact with the pressing plate, and the normally closed wet brake is provided with an oil duct A leading to the annular sealing cavity.
Further, the wet brake device includes a steel sheet fixed on an inner circumference of the brake housing and a friction sheet fixed on an outer circumference of the hub.
Furthermore, Y-shaped rings for axial sealing are arranged on two sides of the annular sealing cavity, and a spacer ring with the outer circumference diameter smaller than the maximum diameter of the annular sealing cavity is arranged between the Y-shaped rings on the two sides.
Further, the oil passage A is an L-shaped oil passage which penetrates from the end face of the outer side of the coupling disc to the inside of the brake shell and is communicated with the annular sealing cavity.
Further, the elastic element is a spring.
Furthermore, a spring cavity is formed in the end face, close to one side of the pressing plate, of the piston, and the elastic element is arranged in the spring cavity.
When the vehicle uses friction disc wearing and tearing after the certain period, piston stroke L grow makes the stopper when the braking, elastic element's elasticity diminishes, and then when making the performance decline of stopper, this application can be through the change L of measuring piston stroke L, the increase of piston stroke promptly, confirm behind the change L, back toward the right side with adjusting nut and twist out, the change L of the volume of twisting out and piston stroke L is unanimous, then toward the left side with adjusting bolt and screw up, it makes piston stroke L diminish to promote the clamp plate, thereby compensate the piston stroke, finally improve stopper braking torque, improve stopper brake performance.
The utility model has the advantages that: the problem that the braking performance is reduced after the vehicle is used for a certain time is solved well by adjusting the stroke of the piston, and the maintenance efficiency and the production efficiency are improved; meanwhile, the explosion-proof problem is effectively solved by adopting a wet braking mode.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, 1, a hub, 2, an oil seal seat, 3, sealing rings I, 4, steel sheets, 5, friction plates, 6, a brake shell, 7, Y-shaped rings I, 8, a spacer ring, 9, Y-shaped rings II, 10, sealing rings II, 11, a connecting disc, 12, an adjusting bolt, 13, an adjusting nut, 14, elastic gaskets I, 15, bolts I, 16, sealing rings III, 17, a pressing plate, 18, an elastic element, 19, a piston, 20, elastic gaskets II, 21, bolts II, 22, annular sealing cavities, 23 and spring cavities.
Detailed Description
The invention will be further explained below with reference to the drawings and examples.
As shown in fig. 1, a normally closed wet brake for compensating piston stroke includes a hub 1 and an oil seal seat 2 sleeved on the hub 1, a brake housing 6 is sleeved outside the oil seal seat 2, a seal ring i 3 is arranged between the oil seal seat 2 and the brake housing 6, the oil seal seat 2 and the brake housing 6 are fixedly connected through a bolt ii 21 and a gasket ii 20, a wet brake device is installed between the brake housing 6 and the hub 1, the wet brake device includes a steel sheet 4 and a friction sheet 5, the steel sheet 4 is fixed on the inner circumference of the brake housing 6, and the friction sheet 5 is fixed on the outer circumference of the hub 1. One side that wet brake kept away from oil seal seat 2 is equipped with piston 19, piston 19 with be formed with axial annular seal chamber 22 between brake housing 6, the left side of annular seal chamber 22 is equipped with Y type circle I7 that is used for axial seal, the right side of annular seal chamber 22 is equipped with Y type circle II 9 that is used for axial seal, is equipped with the spacer ring 8 that outer circumference diameter is less than annular seal chamber 22 maximum diameter between Y type circle I7 and Y type circle II 9, and spacer ring 8 influences pressure oil and gets into annular seal chamber 22 for preventing that Y type circle I7 and Y type circle II 9 are close to the axial in, and the outer circumference diameter of spacer ring 8 is less than annular seal chamber 22 maximum diameter, and the oil circuit gets into annular seal chamber 22 from annular seal chamber 22 maximum diameter department, therefore, spacer ring 8 can not influence the entering of pressure oil. One side of the piston 19, which is far away from the wet braking device, is provided with a coupling disc 11, the coupling disc 11 and the braking shell 6 are axially fixed through a bolt I15 and an elastic pad II 14, a pressing plate 17 is arranged between the piston 19 and the coupling disc 11, an elastic element 18 is arranged between the pressing plate 17 and the piston 19, the outer side of the coupling disc 11 is provided with an adjusting bolt 12, the adjusting bolt 12 is sleeved with an adjusting nut 13, the adjusting bolt 12 extends into the inner side of the coupling disc 11 and is in close contact with the pressing plate 17 through the outer side of the coupling disc 11, a screw of the adjusting bolt 12 is sleeved with a sealing ring III 16, and the normally closed wet brake is provided with an oil duct A leading to an annular sealing cavity 22.
Specifically, the a oil passage is an L-shaped oil passage which penetrates from the end face of the outer side of the coupling disc 11 to the inside of the brake housing 6 and is communicated with the annular sealing cavity 22. The contact surface of the coupling disc 11 and the brake housing 6 is provided with a sealing ring II 10 for sealing.
Furthermore, the elastic element 18 is a spring, a spring cavity 23 is formed in the end face of the piston 19 close to the pressure plate 17, the elastic element 18 is arranged in the spring cavity 23, and the spring cavity 23 plays a role in guiding and limiting the axial extension of the elastic element 18.
(1) Service state of brake
The brake has two states: driving state, braking state
1) The driving state is as follows: when the vehicle needs to be started, pressure oil of a brake system is introduced into an annular sealing cavity 22 in the brake through an oil passage A, hydraulic pressure pushes a piston 19 to overcome the elastic force of an elastic element 18 to move axially in the direction away from a wet brake device, the piston 19 moves towards the right side to enable a gap to be generated between the piston 19 and the wet brake device, and friction torque disappears when the friction plate 5 and the steel sheet 4 are under the condition of no pressure of the piston 19, so that the brake is in an opening state and a brake release state.
2) A braking state: when the vehicle needs to be braked, the brake system releases pressure, pressure oil in the brake is led in and quickly returns to the oil tank, no pressure oil exists in the annular sealing cavity 22, at the moment, under the action of the elastic force of the elastic element 18, the piston 19 presses the wet brake device, the friction plate 5 and the steel sheet 4 generate friction torque under the pressure of the piston 19, and the wheel hub 1 is braked, so that the vehicle is decelerated and stopped, and the vehicle brake effect is achieved.
(2) Compensation of piston stroke
When the vehicle uses the wearing and tearing of friction disc 5 behind the certain time, piston stroke L grow makes the stopper when the braking, elastic element 18's elasticity diminishes, and then when making the performance decline of stopper, this application can be through measuring piston stroke L's variation L, the increase of piston stroke promptly, confirm behind the variation L, back adjusting nut 13 turns to the right side and screws out, the amount of screwing out is unanimous with piston stroke L's variation L, then it tightens up adjusting bolt 12 to turn to the left side, promote clamp plate 17 and make piston stroke L diminish, thereby compensate the piston stroke, finally improve stopper braking torque, improve stopper brake performance.
Claims (6)
1. A normal close formula wet brake of compensation piston stroke which characterized in that: comprises a hub (1) and an oil seal seat (2) sleeved on the hub (1), wherein a brake shell (6) is sleeved on the outer side of the oil seal seat (2), the oil seal seat (2) is fixedly connected with the brake shell (6), a wet type brake device is installed between the brake shell (6) and the hub (1), one side of the wet type brake device, which is far away from the oil seal seat (2), is provided with a piston (19), an axial annular sealing cavity (22) is formed between the piston (19) and the brake shell (6), one side of the piston (19), which is far away from the wet type brake device, is provided with a coupling disc (11), the coupling disc (11) and the brake shell (6) are axially fixed, a pressing plate (17) is arranged between the piston (19) and the coupling disc (11), an elastic element (18) is arranged between the pressing plate (17) and the piston (19), and an adjusting bolt (12) is arranged on the outer side of the coupling disc (11), the adjusting bolt (12) extends into the inner side of the connecting disc (11) from the outer side of the connecting disc (11) to be in close contact with the pressing plate (17), and an A oil duct leading to the annular sealing cavity (22) is arranged on the normally closed wet brake.
2. The normally closed wet brake for compensating for a piston stroke as set forth in claim 1, wherein: the wet brake device comprises a steel sheet (4) and a friction sheet (5), wherein the steel sheet (4) is fixed on the inner circumference of the brake shell (6), and the friction sheet (5) is fixed on the outer circumference of the hub (1).
3. The normally closed wet brake for compensating for a piston stroke as set forth in claim 1, wherein: and Y-shaped rings for axial sealing are arranged on two sides of the annular sealing cavity (22), and a spacer ring (8) with the outer circumference diameter smaller than the maximum diameter of the annular sealing cavity (22) is arranged between the Y-shaped rings on the two sides.
4. The normally closed wet brake for compensating for a piston stroke as set forth in claim 1, wherein: the oil passage A is an L-shaped oil passage which penetrates from the end face of the outer side of the connecting disc (11) to the interior of the brake shell (6) and is communicated with the annular sealing cavity (22).
5. The normally closed wet brake for compensating for a piston stroke as set forth in claim 1, wherein: the elastic element (18) is a spring.
6. The normally closed wet brake for compensating for a piston stroke as set forth in claim 5, wherein: the end face of the piston (19) close to one side of the pressure plate (17) is provided with a spring cavity (23), and the elastic element (18) is arranged in the spring cavity (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922342190.6U CN211449449U (en) | 2019-12-24 | 2019-12-24 | Normally closed wet brake for compensating piston stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922342190.6U CN211449449U (en) | 2019-12-24 | 2019-12-24 | Normally closed wet brake for compensating piston stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211449449U true CN211449449U (en) | 2020-09-08 |
Family
ID=72299155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922342190.6U Active CN211449449U (en) | 2019-12-24 | 2019-12-24 | Normally closed wet brake for compensating piston stroke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211449449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044988A (en) * | 2022-12-21 | 2023-05-02 | 陕西法士特齿轮有限责任公司 | Hydraulic parking brake |
-
2019
- 2019-12-24 CN CN201922342190.6U patent/CN211449449U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044988A (en) * | 2022-12-21 | 2023-05-02 | 陕西法士特齿轮有限责任公司 | Hydraulic parking brake |
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