CN219623118U - Parking brake capable of braking input shaft during power running - Google Patents
Parking brake capable of braking input shaft during power running Download PDFInfo
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- CN219623118U CN219623118U CN202320929098.3U CN202320929098U CN219623118U CN 219623118 U CN219623118 U CN 219623118U CN 202320929098 U CN202320929098 U CN 202320929098U CN 219623118 U CN219623118 U CN 219623118U
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- friction plate
- brake
- input shaft
- braking
- static friction
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Abstract
The utility model discloses a parking brake capable of braking an input shaft during power running, which comprises a brake seat, an input sleeve, a static friction plate and a dynamic friction plate, wherein the brake seat is provided with a braking space for accommodating a braking piece, the inner wall of the braking space is provided with an inner spline I, the static friction plate is provided with an outer spline I, the inner wall of the brake seat is matched with the inner spline I, the input sleeve is sleeved outside the input shaft of a speed reducer and is positioned in a cylindrical inner hole of the static friction plate, the periphery of the input sleeve is provided with an outer spline II, the inner wall of the dynamic friction plate is provided with an inner spline II, the dynamic friction plate and the static friction plate are arranged alternately through being matched with the outer spline II, one side of an annular shell of the brake seat is provided with a cooling oil inlet, the other side of the annular shell is provided with an oil outlet, when the static friction plate and the dynamic friction plate rotate are axially pressed, braking of the input shaft of the speed reducer is realized, and heat generated between the static friction plate and the dynamic friction plate is taken away by flowing cooling oil.
Description
Technical Field
The utility model relates to a parking brake capable of braking an input shaft during power running, and belongs to the technical field of parking brakes.
Background
The utility model is mainly aimed at the braking system of engineering machinery without dynamic braking control, such as the braking system of crawler crane, truck crane and excavator, etc.
The parking brake is generally used for braking after parking and consists of an input sleeve, a brake seat, a friction plate, a friction steel sheet, a spring, a piston and an oil cylinder. The brake seat is an annular body and is provided with a cylindrical braking space, and the brake seat is in butt joint and fixation with the speed reducer shells at the two sides; one side of the braking space is a power space for installing a motor or an engine, and the other side of the braking space is a speed reducer space.
The inner wall of the braking space is provided with an axial internal spline I, and the friction plate is an annular sheet body and is provided with a cylindrical inner hole; the traditional structure is that the friction plate is provided with an external spline I matched with an internal spline I of the brake seat, and the friction plate is arranged on the inner wall of the brake seat through the matching of the external spline I and the internal spline I and can axially slide along the internal spline I but cannot rotate, and is hereinafter called a static friction plate for short; the input sleeve is sleeved outside the input shaft of the speed reducer and is positioned in the cylindrical inner hole of the friction plate, and the input sleeve, the input shaft of the speed reducer and the cylindrical inner hole of the friction plate are all positioned on the same axis; the outer periphery of the input sleeve is provided with an external spline II, the friction steel sheet is an annular sheet body and is provided with a cylindrical inner hole, the cylindrical inner hole wall is provided with an internal spline II, and the friction steel sheet is arranged on the outer periphery of the input sleeve in a matched manner through the internal spline II on the inner hole and the external spline II of the input sleeve and can axially slide along the external spline II of the input sleeve and simultaneously can rotate along with an input shaft of the speed reducer, and is hereinafter called as a dynamic friction sheet; in general, the dynamic friction plate and the static friction plate are arranged alternately, and when the static friction plate and the dynamic friction plate are axially pressed by the piston, the braking of the input shaft of the speed reducer is realized.
The motor-mounted side of the speed reducer is provided with a piston capable of axially pushing the movable friction plate and the static friction plate, the motor-mounted side of the piston is provided with a spring, and the spring can push the piston to compress the movable friction plate and the static friction plate. An oil cylinder is arranged between the piston and the shell of the speed reducer, hydraulic oil is injected into the oil cylinder to overcome the elastic force caused by compression of the spring when the speed reducer works normally, so that the piston does not press the static friction plate and the dynamic friction plate any more, and the brake is in a releasing state; when braking is needed after stopping, the hydraulic oil injection is stopped, the spring loses pressure and returns to a normal state, the piston presses the friction plate under the action of the elastic force of the spring, and the input shaft is connected with the shell, so that braking is realized.
For a rotary planetary gear reducer, the conventional structure has a hydraulic release spring-multiple friction plate brake with a fine design as a parking brake. The parking brake brakes after parking. This brake can only be braked after parking and cannot be used during operation. That is, the friction plate is only overlapped with the friction plate when the friction plate is stationary to prevent the machine from rotating. In the braking mode, the dynamic friction plate and the static friction plate always have no relative friction, and heat cannot be generated.
However, the swing speed reducer often needs to brake during normal operation, or needs to control different output torques to achieve different speeds, for example, the swing speed reducer needs to be decelerated or stopped when the vehicle has a certain speed and the machine needs to be decelerated or stopped when the machine is operating. Traditionally these functions have been accomplished by service brakes. If a service brake is added, not only will the cost increase be caused, but the weight and axial dimension of the speed reducer will also increase. Therefore, the method is economical, convenient and effective if the existing parking brake can be modified to have the service braking function. To achieve this, it is necessary to solve the problem of rapid temperature rise of the dynamic friction plate when braking in superposition with the static friction plate in the rotating state, otherwise, once the parking brake performs the operation while the machine is running, the dynamic friction plate and the static friction plate will be ablated by the greatly increased temperature.
By searching, patent document with application number 201921578462.6, named parking brake, discloses a hydraulic spring parking brake which relates to a braking system of a vehicle, wherein two ends of a cylinder body of the brake are respectively in clearance fit with a shaft sleeve and an end cover and are fixed together by bolts; the shaft sleeve is sleeved on the spline sleeve, and the spline sleeve is connected with the connecting shaft sleeve through the ball bearing and the outer friction plate; the connecting shaft sleeve is connected with the shaft end of the output shaft of the transfer case, the cylinder body is sleeved with a piston, and the piston top can compress or release the friction pair; the end cover is provided with a guide shaft, a disc spring is sleeved on the guide shaft, and the disc spring is arranged between the end cover and the piston; the brake can change the braking moment only by changing the number of the inner friction plates and the outer friction plates, and meets the braking requirements of different vehicles with the underground load of less than 10 tons in a coal mine; the piston separates the friction plate braking cavity from the spring mounting cavity, so that cooling oil in the brake is not easy to leak; the application of the transfer case enables the installation height to reach the safety standard requirement; the difficulty that parking brakes are arranged on the service brakes of the four-wheel drive vehicle for the mine is effectively solved; simple structure has practiced thrift the cost of manufacture. According to the above description, this document does not solve the problem that the temperature of the dynamic friction plate increases rapidly when braking in a state of being superposed with the static friction plate in a rotating state.
Disclosure of Invention
The utility model aims to solve the technical problems that: the problem of how to prevent the dynamic friction plate and the static friction plate from being heated up greatly in the process of applying the braking when the motor is still running by utilizing the parking braking.
Aiming at the problems, the technical proposal provided by the utility model is as follows:
the parking brake capable of braking an input shaft during power running comprises a brake seat, an input sleeve, a static friction plate and a dynamic friction plate, wherein the brake seat is an annular shell, a braking space for accommodating a braking piece is formed, the brake seat is in butt joint with the speed reducer shell, an inner spline I is arranged on the inner wall of the braking space, the static friction plate is provided with an outer spline I, the static friction plate is installed on the inner wall of the brake seat in a matched mode and can axially slide along the inner spline I, the input sleeve is sleeved outside the speed reducer input shaft and is positioned in a cylindrical inner hole of the static friction plate, an outer spline II is arranged on the outer periphery of the input sleeve, an inner spline II is arranged on the inner hole wall of the dynamic friction plate, the dynamic friction plate and the static friction plate can axially slide along the outer spline II and simultaneously rotate along the speed reducer input shaft, a cooling oil inlet hole is formed in one side of the annular shell of the brake seat, an oil outlet is formed in the other side of the annular shell, braking of the static friction plate and the speed reducer input shaft is realized when the static friction plate and the rotating dynamic friction plate are axially compressed, and heat generated between the friction plate and the dynamic friction plate is taken away.
Further, the static friction plate and/or the dynamic friction plate are/is provided with an oil groove.
Further, the oil grooves are arranged in a grid shape.
Further, 1 to 8 oil inlets are arranged on one side of the brake seat; the number of the oil outlet holes is 1-8, and the oil outlet holes are distributed on the other side of the brake seat.
Further, 2 oil inlets are arranged on one side of the brake seat in the circumferential direction; the number of the oil outlet holes is 2, and the oil outlet holes are circumferentially distributed on the other side of the brake seat.
Further, the static friction plate is a friction steel plate, and the dynamic friction plate is a paper-based friction plate.
Further, O-shaped sealing rings are arranged at the two sides of the brake seat and the seam allowance of the speed reducer shell.
Further, a pressure-resistant oil seal is provided between the braking space and the speed reducer space and between the braking space and the power space.
Advantageous effects
1. The brake can be applied to the input shaft of the speed reducer under the running condition of the power mechanism, so that most of heat generated between the rotating dynamic friction plate and the static friction plate is taken away by cooling oil, and the rising temperature of the dynamic friction plate and the static friction plate is ensured to be within a safe range;
2. the original structural form is basically maintained, and the transformation cost is low.
Drawings
FIG. 1 is a schematic cross-sectional view of the structural relationship of a parking brake in a retarder;
FIG. 2 is a partial schematic view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the brake housing, input sleeve, and input shaft;
FIG. 4 is a schematic plan view of a static friction plate;
fig. 5 is a schematic plan view of a dynamic friction plate.
In the figure: 1. a brake seat; 101. an internal spline I; 102. an oil inlet hole; 103. an oil outlet hole; 104. a braking space; 2. an input sleeve; 201. an external spline II; 3. a static friction plate; 301. an external spline I; 4. a dynamic friction plate; 403. an internal spline II; 6. an input shaft; an oil groove; 7. an O-shaped sealing ring; 8. pressure-resistant oil seal; 9. a piston; 10. a spring; 11. an oil cylinder; 1000. a parking brake.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1 to 5, a parking brake 1000 capable of braking an input shaft during power running includes a brake holder 1, an input sleeve 2, a static friction plate 3, a dynamic friction plate 4, a spring 10, a piston 9, and an oil cylinder 11. The brake seat 1 is an annular shell, a brake space 104 for accommodating a brake piece is arranged and is in butt joint with the speed reducer shells on two sides, an inner spline I101 is arranged on the inner wall of the brake space 104, an outer spline I301 is arranged on the static friction plate 3, the static friction plate 3 is installed on the inner wall of the brake seat 1 in a matched mode with the inner spline I101 and can axially slide along the inner spline I101, the input sleeve 2 is sleeved outside the speed reducer input shaft 5 and is positioned in a cylindrical inner hole of the static friction plate 3, an outer spline II 201 is arranged on the periphery of the input sleeve 2, an inner spline II 403 is arranged on the inner hole wall of the dynamic friction plate 4, and the dynamic friction plate 4 and the static friction plate 3 can axially slide along the outer spline II 201 in a matched mode with the outer spline II 201 and can rotate along with the speed reducer input shaft 5, and the improvement is mainly characterized in that: the annular shell of the brake seat 1 is provided with a cooling oil inlet hole 102 on one side and an oil outlet hole 103 on the other side, so that cooling oil enters from one side of the annular shell of the brake seat 1 and goes out through the other side of the annular shell of the brake seat 1, and the cooling oil forms a flow without dead angle in a brake space 104. To ensure adequate flow and velocity, pressurized lubrication is applied to the brake volume 104. In this way, the cooling oil brings the temperatures of the dynamic friction plate 4 and the static friction plate 3 to a very low state before braking is applied, thereby reducing the heating base. When the static friction plate 3 and the rotating dynamic friction plate 4 are axially pressed by the piston 9, the braking of the input shaft 5 of the speed reducer is realized, and most of heat generated between the static friction plate 3 and the rotating dynamic friction plate 4 is taken away by cooling oil, so that high-temperature ablation of the static friction plate 3 and the dynamic friction plate 4 is effectively avoided.
As shown in fig. 5, in order to further improve the efficiency of the cooling oil to remove the heat generated by friction between the static friction plate 3 and the dynamic friction plate 4, an oil groove 6 is provided in the static friction plate 3 and/or the dynamic friction plate 4 to enable the flowing cooling oil to flow between the static friction plate 3 and the dynamic friction plate 4.
Further, in order to ensure that the rotating dynamic friction plate 4 can feed oil at multiple angles, the oil grooves 6 are arranged in a grid shape.
As shown in fig. 3, 1 to 8 oil inlets 102, such as 1, 2, 3, 4, 5, 6, 7, 8, are arranged on one side of the brake seat 1; the oil outlet holes 103 are arranged on the other side of the brake seat 1, and 1 to 8, such as 1, 2, 3, 4, 5, 6, 7 and 8.
The number of the oil inlets 102 is 2, and the oil inlets are circumferentially arranged on one side of the brake seat 1; the number of the oil outlet holes 103 is 2, and the oil outlet holes are circumferentially distributed on the other side of the brake seat 1.
Selecting one: the static friction plate 3 is a friction steel plate, and the dynamic friction plate 4 is a paper-based friction plate.
Selecting two: the static friction plate 3 is a paper-based friction plate, and the dynamic friction plate 4 is a friction steel plate.
The paper-based friction plate has recoverable compression set characteristics, and more important characteristics are good wear resistance, and the cooling oil is not easy to fall off and pollute by scraps during friction.
As shown in fig. 1, since the braking space 104 is pressurized and supplied with oil, the braking space 104 has high oil pressure, in order to ensure that structural joints around the braking space 104 do not release pressure and leak oil, O-shaped sealing rings 7 are arranged at the seam-closure positions of the two sides of the brake seat 1 and the speed reducer housing, and pressure-proof oil seals 8 are arranged between the braking space 104 and the speed reducer space and between the braking space 104 and the power space.
The above embodiments are only for the purpose of more clearly describing the present utility model and should not be construed as limiting the scope of the present utility model, and any equivalent modifications should be construed as falling within the scope of the present utility model.
Claims (8)
1. The utility model provides a parking brake that can apply braking to input shaft when power is operated, including stopper seat (1), input cover (2), static friction piece (3), dynamic friction piece (4), stopper seat (1) are annular casing, have braking space (104) that holds the brake piece, dock fixedly with the reduction gear casing, braking space (104) inner wall has internal spline one (101), static friction piece (3) have external spline one (301), through install at the inner wall of stopper seat (1) with internal spline one (101) cooperation and can make axial slip along internal spline one (101), input cover (2) suit is outside reduction gear input shaft (5) and be arranged in static friction piece (3) cylindric hole, input cover (2) periphery has external spline two (201), have internal spline two (403) on the internal pore wall of dynamic friction piece (4), install at the periphery of input cover (2) and can make axial slip along external spline two (201) through with external spline two (201) cooperation, simultaneously can rotate with reduction gear input shaft (5), set up with dynamic friction piece (3), characterized in that: a cooling oil inlet hole (102) is formed in one side of an annular shell of the brake base (1), an oil outlet hole (103) is formed in the other side of the annular shell, and when the static friction plate (3) and the rotating dynamic friction plate (4) are axially compressed, braking of a speed reducer input shaft (5) is achieved, and heat generated between the static friction plate (3) and the rotating dynamic friction plate (4) is taken away by cooling oil.
2. The parking brake capable of applying a brake to an input shaft at the time of power running according to claim 1, wherein: and the static friction plate (3) and/or the dynamic friction plate (4) are/is provided with an oil groove (6).
3. A parking brake capable of applying a brake to an input shaft at the time of power running as claimed in claim 2, wherein: the oil grooves (6) are arranged in a grid shape.
4. The parking brake capable of applying a brake to an input shaft at the time of power running according to claim 1, wherein: 1-8 oil inlets (102) are arranged on one side of the brake seat (1); 1-8 oil outlet holes (103) are arranged on the other side of the brake seat (1).
5. The parking brake capable of applying a brake to an input shaft at the time of power running according to claim 1, wherein:
the number of the oil inlets (102) is 2, and the oil inlets are circumferentially arranged on one side of the brake seat (1); the number of the oil outlet holes (103) is 2, and the oil outlet holes are circumferentially distributed on the other side of the brake seat (1).
6. A parking brake for a motor vehicle for applying a brake to an input shaft in powering operation according to any one of claims 1 to 3, wherein: the static friction plate (3) is a friction steel plate, and the dynamic friction plate (4) is a paper-based friction plate.
7. The parking brake capable of applying a brake to an input shaft at the time of power running according to claim 1, wherein: o-shaped sealing rings (7) are arranged at the two sides of the brake seat (1) and the seam allowance of the speed reducer shell.
8. The parking brake capable of applying a brake to an input shaft at the time of power running according to claim 1, wherein: a pressure-resistant oil seal (8) is arranged between the braking space (104) and the speed reducer space and between the braking space (104) and the power space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320929098.3U CN219623118U (en) | 2023-04-23 | 2023-04-23 | Parking brake capable of braking input shaft during power running |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320929098.3U CN219623118U (en) | 2023-04-23 | 2023-04-23 | Parking brake capable of braking input shaft during power running |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219623118U true CN219623118U (en) | 2023-09-01 |
Family
ID=87795221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320929098.3U Active CN219623118U (en) | 2023-04-23 | 2023-04-23 | Parking brake capable of braking input shaft during power running |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219623118U (en) |
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2023
- 2023-04-23 CN CN202320929098.3U patent/CN219623118U/en active Active
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