Brake, control system and working machine

Abstract

The application relates to the technical field of engineering equipment, in particular to a brake, a control system and a working machine. The brake comprises a shell, a brake friction plate group, a piston, an elastic piece and a displacement sensor. The brake friction plate group is arranged in the shell. The piston is movably arranged in the shell along the axial direction. A pressure cavity is arranged on one side of the piston in the shell. The pressure cavity is used for filling pressure medium. The elastic piece is arranged in the shell and abuts against the side of the piston away from the pressure cavity. The elastic piece or the pressure medium can drive the piston to move towards the brake friction plate group and press the brake friction plate group, so as to realize braking. The pressure medium or the elastic piece can drive the piston to move towards the direction away from the brake friction plate group, so as to release the braking. The displacement sensor is arranged in the shell and the detection end thereof abuts against the piston, and is used for detecting the position data of the piston. The application can slow down the wear of the friction plate, ensure the safe operation underground and avoid the waste of resources and time.

Description

Technical Field

[0001] This invention relates to the field of engineering equipment technology, and in particular to a brake, control system and working machinery. Background Technology

[0002] Operating machinery, such as coal mining machines, can be used to operate in undulating coal seams underground. The brakes of the operating machinery are used to reduce or stop the traveling speed of the operating machinery.

[0003] In related technologies, in order to avoid braking failure due to excessive wear of the friction pads, the friction pads need to be replaced regularly. However, it is impossible to accurately determine when to replace the friction pads, which can easily lead to a waste of resources and time. If operation is carried out when the braking function fails, slippage can easily occur, affecting the safe operation of the mine. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] Therefore, the present invention provides a brake that can slow down the wear of friction pads and accurately determine when the friction pads need to be replaced, thereby ensuring safe downhole operations and avoiding waste of resources and time.

[0006] The present invention also provides a control system for controlling the above-mentioned brake.

[0007] The present invention also provides a working machine including the above-described brake.

[0008] A brake according to a first aspect of the present invention includes:

[0009] case;

[0010] Brake friction pad assembly, disposed within the housing;

[0011] A piston is movably disposed within the housing along its axial direction. A pressure chamber is provided on one side of the piston within the housing, and the pressure chamber is used to fill the pressure medium.

[0012] An elastic element is disposed within the housing and abuts against the side of the piston opposite to the pressure chamber. The elastic element or the pressure medium can drive the piston toward the brake friction pad assembly and press the brake friction pad assembly to achieve braking. The pressure medium or the elastic element can drive the piston toward the direction opposite to the brake friction pad assembly to release the braking.

[0013] A displacement sensor is disposed in the housing, with its detection end abutting against the piston, for detecting the position data of the piston.

[0014] Preferably, the brake further includes a shaft connecting sleeve, which is rotatably disposed within the housing about its axial direction and is used to connect the output shaft. When the brake friction pad assembly is pressed, it brakes the shaft connecting sleeve.

[0015] Preferably, the brake friction pad assembly includes at least one static friction pad and at least one dynamic friction pad. The static friction pad is connected to the inner wall of the housing, and the dynamic friction pad is connected to the circumferential outer wall of the shaft connecting sleeve. At least one static friction pad and at least one dynamic friction pad are alternately arranged along the axial direction of the shaft connecting sleeve.

[0016] Preferably, the brake further includes a brake closing assembly disposed in the housing and connected to the piston, the brake closing assembly being capable of locking the piston in a position where the brake friction pad assembly is released.

[0017] Preferably, the brake closing assembly includes a locking bolt that is movably inserted through the housing, with its head located outside the housing and its tail threadedly connected to the piston.

[0018] Preferably, the brake further includes a controller, and the displacement sensor is communicatively connected to the controller, which is capable of calculating the actual wear of the brake friction pad assembly based on the position data of the piston.

[0019] Preferably, the brake further includes a display, which is communicatively connected to the controller. The display can show the actual wear amount, and when the actual wear amount reaches the set wear amount, the display can show a replacement prompt.

[0020] Preferably, the pressure chamber is formed by the housing and the piston, and the outer wall of the housing has a medium inlet and a medium outlet respectively connected to the pressure chamber.

[0021] According to a second aspect of the present invention, a control system is used to control the brake in the first aspect or its various implementations. The control system is communicatively connected to the displacement sensor. The control system can acquire the position data and determine whether the piston is fully open based on the position data, and determine whether the actual wear of the brake friction pad assembly has reached a set wear amount.

[0022] According to a third aspect of the present invention, a working machine includes the brake described in the first aspect or its various implementations.

[0023] One of the above technical solutions has at least the following advantages or beneficial effects:

[0024] In one embodiment of the present invention, when applied to a work machinery, the housing is connected to the main body of the work machinery, and the output shaft of the work machinery is connected to the brake friction pad assembly. During normal operation of the work machinery, the brake is in a released state; the piston releases the brake friction pad assembly, and the brake friction pad assembly does not brake the output shaft. When braking is required, the pressure of the pressure medium in the pressure chamber is changed, causing the piston to move towards the brake friction pad assembly and press against it, thus braking the output shaft. After braking is completed, the pressure of the pressure medium in the pressure chamber is changed, causing the piston to move away from the brake friction pad assembly to release it, thus releasing the brake friction pad assembly from braking the output shaft.

[0025] The displacement sensor is used to detect the piston's position data. Based on the detected position data, it can be inferred whether the piston has moved to the fully open position, thereby accurately inferring whether the brake is fully open. This ensures that the vehicle moves only after it is fully open, avoiding driving with the brakes on and delaying the wear of the brake friction pad assembly.

[0026] A displacement sensor is used to detect the piston's position data. Based on the piston's position data under the initial braking state and the current braking state, the actual wear of the brake friction pad assembly can be obtained. By comparing the actual wear with the set wear, when the actual wear reaches the set wear, the brake friction pad assembly needs to be replaced. This allows for precise determination of when the brake friction pad assembly needs to be replaced, thereby ensuring safe downhole operations and avoiding waste of resources and time. The control system provided in this embodiment of the invention is used to control the brake described above. Since the brake has the above-mentioned technical effects, the control system controlling the brake should also have corresponding technical effects.

[0027] The working machinery provided in this embodiment of the invention is equipped with the brake described above. Since the brake has the above-mentioned technical effects, the working machinery equipped with the brake should also have the corresponding technical effects. Attached Figure Description

[0028] Figure 1 A schematic diagram of a brake according to an embodiment of the present invention is shown;

[0029] Figure 2 It shows Figure 1 Sectional view along the middle AA direction;

[0030] Figure 3 It shows Figure 2 Enlarged view of point A in the middle.

[0031] [Explanation of Labels in the Attached Image]

[0032] 11. Square cover; 12. Spline housing; 13. Oil chamber housing; 14. End cover; 15. Mounting bolt; 2. Brake friction pad assembly; 21. Static friction pad; 22. Dynamic friction pad; 3. Piston; 4. Elastic element; 5. Displacement sensor; 6. Shaft connecting sleeve; 7. Locking bolt; 8. Pressure chamber. Detailed Implementation

[0033] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] It should be noted that in the description of this invention, the terms "front," "rear," "left," "right," "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "front," "rear," "left," "right," "upper," and "lower" used in the description of this invention refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0035] As mentioned above, the inventors discovered that some existing brakes use hydraulic pressure sensors to detect hydraulic pressure and infer whether the brake is fully open. However, hydraulic actuation has a delay defect, which may result in the working machine moving before the brake is fully open, which is equivalent to moving with the brakes on and accelerates the wear of the friction pads. Moreover, in order to avoid braking failure due to excessive wear of the friction pads, the existing solution is to replace the friction pads periodically. However, due to the uneven quality of the friction pads and different road conditions, the wear rate of the friction pads will be different. Therefore, the existing solution cannot accurately determine the time to replace the friction pads. If the replacement is too early, it will waste resources and time. If the replacement is too late, the operation will be carried out when the braking function has failed, which may cause slippage and affect the safety of downhole operations.

[0036] In order to solve at least one of the technical problems existing in the prior art or related art, the present invention provides a brake, a control system and a working machine.

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] See Figures 1 to 3This invention provides a brake according to one embodiment, which can be used in working machinery. Exemplarily, the working machinery can be a coal mining machine, a tunneling machine, or other mobile equipment used for mining. The brake includes a housing, a brake friction pad assembly 2, a piston 3, an elastic element 4, and a displacement sensor 5. The brake friction pad assembly 2 is disposed within the housing. The piston 3 is axially movably disposed within the housing, and a pressure chamber 8 is provided on one side of the piston 3 within the housing, for filling with a pressure medium. The elastic element 4 is disposed within the housing and abuts against the side of the piston 3 opposite to the pressure chamber 8. The elastic element 4 or the pressure medium can drive the piston 3 to move towards and press against the brake friction pad assembly 2 to achieve braking. The pressure medium or the elastic element 4 can also drive the piston 3 to move away from the brake friction pad assembly 2 to release the brake. The displacement sensor 5 is disposed within the housing, and its detection end abuts against the piston 3 for detecting the position data of the piston 3.

[0039] It should be noted that the detection end of the displacement sensor 5 has an internal spring, which keeps the end pressed against the piston 3, and collects the position data of the piston 3 in real time.

[0040] In this embodiment, when applied to a coal mining machine, the housing is connected to the main body of the coal mining machine, and the output shaft of the coal mining machine is connected to the brake friction pad assembly 2. During normal operation of the coal mining machine, the brake is in a released state, and the piston 3 releases the brake friction pad assembly 2, so the brake friction pad assembly 2 does not brake the output shaft. When braking is required, the pressure of the pressure medium in the pressure chamber 8 is changed, causing the piston 3 to move towards the brake friction pad assembly 2 and press against it, thus braking the output shaft. After braking is complete, the pressure of the pressure medium in the pressure chamber 8 is changed, causing the piston 3 to move away from the brake friction pad assembly 2, thereby releasing the brake friction pad assembly 2 from braking the output shaft.

[0041] Displacement sensor 5 is used to detect the position data of piston 3. Based on the detected position data, it can be inferred whether piston 3 has moved to the fully open position, thereby accurately determining whether the brake is fully open. This ensures that the brake is fully open before movement, avoiding driving with the brakes on and delaying the wear of brake friction pad assembly 2. For example, an open position X can be preset in the piston 3's movement stroke. T When piston 3 moves to X T At that time, piston 3 completely releases brake friction pad assembly 2, and the brake is completely released. That is, when displacement sensor 5 detects the position data of piston 3 as X... T When the piston 3 moves to the fully open position, the brake is fully open and in the released state, ensuring that the vehicle can only move after the brake is fully released, avoiding driving with the brake on and delaying the wear of the brake friction pad assembly 2.

[0042] Displacement sensor 5 is used to detect the position data of piston 3. Based on the position data of piston 3 in the initial braking state and the current braking state, the actual wear of brake friction pad assembly 2 can be obtained. By comparing the actual wear with the set wear, when the actual wear reaches the set wear, brake friction pad assembly 2 needs to be replaced. This allows for precise determination of when brake friction pad assembly 2 needs to be replaced, thereby ensuring safe downhole operation and avoiding waste of resources and time. For example, let the position data of piston 3 in the initial braking state, the second braking state, ..., the previous braking state, and the current braking state be X1, X2, ..., X... n-1 X n Set the wear amount as X P Therefore, the actual wear amount in the second braking cycle is X2-X1, and the actual wear amount in the previous braking cycle is X. n-1 -X1, The actual wear amount during the current braking cycle is X. n -X1, when X n-1 -X1-X P <0, and X n -X1-X P When the value is ≥0, it means that the actual wear amount in the current braking cycle has reached the set wear amount. At this time, the brake friction pad group 2 in the brake needs to be replaced.

[0043] Optionally, the pressure medium can be a gas or a liquid.

[0044] Specifically, in this embodiment, the pressure medium is pressurized oil, that is, the brake provided in this embodiment is a hydraulic brake.

[0045] Specifically, in this embodiment, see Figure 2 The pressure chamber 8 and the brake friction pad assembly 2 are located on the same side of the piston 3, and the elastic element 4 is located on the other side of the piston 3. When the pressure in the pressure chamber 8 is low, the elastic element 4 moves against the piston 3 toward the brake friction pad assembly 2 and presses the brake friction pad assembly 2 to achieve braking. When it is necessary to release the brake, the pressure in the pressure chamber 8 is increased. When the pressure is greater than the elastic force of the elastic element 4, it moves against the piston 3 toward the direction away from the brake friction pad assembly 2 to release the brake.

[0046] Optionally, in other embodiments, the elastic element 4 and the brake friction pad assembly 2 are disposed on the same side of the piston 3, and the pressure chamber 8 is disposed on the other side of the piston 3. When braking is required, the pressure in the pressure chamber 8 is increased, and the pressure medium pushes against the piston 3 toward the brake friction pad assembly 2 and presses the brake friction pad assembly 2 to achieve braking. When braking is required, the pressure in the pressure chamber 8 is reduced. After the pressure is less than the elastic force of the elastic element 4, the elastic element 4 moves against the piston 3 toward the direction away from the brake friction pad assembly 2 to release the braking.

[0047] Specifically, the brake also includes a shaft connecting sleeve 6, which is rotatably disposed within the housing about its axial direction and is used to connect the output shaft. When the brake friction pad assembly 2 is pressed, it brakes the shaft connecting sleeve 6. The shaft connecting sleeve 6 is used to connect with the output shaft of the coal mining machine, and when the brake friction pad assembly 2 is pressed, it brakes the shaft connecting sleeve 6, thereby achieving braking of the output shaft.

[0048] More specifically, the shaft connecting sleeve 6 is a spline sleeve, which facilitates coaxial rotational connection with the output shaft.

[0049] Specifically, the brake friction pad assembly 2 includes at least one static friction pad 21 and at least one dynamic friction pad 22. The static friction pad 21 is connected to the inner wall of the housing, and the dynamic friction pad 22 is connected to the circumferential outer wall of the shaft connecting sleeve 6. At least one static friction pad 21 and at least one dynamic friction pad 22 are alternately arranged along the axial direction of the shaft connecting sleeve 6. In the non-braking state, the static friction pad 21 and the dynamic friction pad 22 are released from each other, and the dynamic friction pad 22 rotates relative to the static friction pad 21 as the shaft connecting sleeve 6 rotates, ensuring smooth rotation of the output shaft. In the braking state, the piston 3 presses against the outermost static friction pad 21 or the outermost dynamic friction pad 22. Through the sequential transmission of the clamping force, all the static friction pads 21 and all the dynamic friction pads 22 in the brake friction pad assembly 2 are pressed together, increasing the friction between the static friction pads 21 and the dynamic friction pads 22, making it impossible for the dynamic friction pad 22 to rotate. Thus, the shaft connecting sleeve 6 cannot rotate, that is, the output shaft is braked.

[0050] Specifically, the brake also includes a controller, with the displacement sensor 5 communicatively connected to the controller. The controller can calculate the actual wear of the brake friction pad assembly 2 based on the position data of the piston 3. Thanks to the controller, the actual wear is automatically calculated.

[0051] Piston 3 is in the open position X each time the brake is released. T That is, the position data of piston 3 is X T When this happens, it can be deduced that piston 3 has moved to the fully open position.

[0052] Due to the wear of the static friction plate 21 and the dynamic friction plate 22, the piston 3 moves to a different pressing position each time. In this embodiment, if the controller determines that the position data of the piston 3 remains unchanged for a set time during the movement of the piston 3 toward the brake friction plate assembly 2, then it is determined that the piston 3 has pressed into place and braking is completed. The value at which the piston 3 remains unchanged is the position data during that braking state. For example, the set time is S. t When the controller determines that the position data of piston 3 is stuck at the value X n More than S t If it still doesn't change, press it firmly into place and read the value X. nThe position data during that braking state is used to calculate the actual wear.

[0053] More specifically, the brake also includes a display, which is communicatively connected to the controller. The display shows the actual wear level, and when the actual wear level reaches the set wear level, the display shows a replacement prompt. This display allows operators to conveniently and in real-time obtain the actual wear level and promptly remind them to replace the friction pads.

[0054] Optionally, the elastic element 4 can be any elastic component, such as a coil spring, a disc spring, etc.

[0055] In this embodiment, the elastic element 4 is preferably a disc spring. The disc spring design results in a larger braking torque of the brake, making it suitable for heavy load conditions.

[0056] Specifically, the pressure chamber 8 is formed by the shell and the piston 3. The outer wall of the shell has a medium inlet and a medium outlet that are respectively connected to the pressure chamber 8. The medium inlet and the medium outlet are used to add and discharge the pressure medium, respectively. When the pressure medium is added through the medium inlet, the pressure medium in the pressure chamber 8 increases, and the internal pressure increases; when the pressure medium is discharged through the medium outlet, the pressure medium in the pressure chamber 8 decreases, and the internal pressure decreases.

[0057] More specifically, the pressure chamber 8 is annular and shares a central axis with the piston 3. This arrangement ensures the symmetry of the pressure applied to the piston 3 by the pressure medium, thus guaranteeing the smooth movement of the piston 3.

[0058] Similarly, the elastic element 4 is also arranged in a ring shape and shares a central axis with the piston 3. This arrangement ensures the symmetry of the pressure applied by the elastic element 4 to the piston 3, thus guaranteeing the smooth movement of the piston 3.

[0059] Specifically, the housing includes a square cover 11, a splined housing 12, an oil chamber housing 13, and an end cover 14 arranged sequentially. A static friction plate 21 is connected to the inner wall of the splined housing 12. A shaft connecting sleeve 6 and a dynamic friction plate 22 are disposed in the internal cavity of the splined housing 12. A piston 3 is disposed in the oil chamber housing 13. The piston 3 and the inner wall of the oil chamber housing 13 form a pressure chamber 8. A medium inlet and a medium outlet are opened on the outer wall of the oil chamber housing 13. A first elastic element receiving groove is opened on the side of the piston 3 away from the pressure chamber 8. A second elastic element receiving groove is opened on the inner wall of the end cover 14, which is opposite to the first elastic element receiving groove. The two ends of the elastic element 4 are respectively disposed in the first elastic element receiving groove and the second elastic element receiving groove.

[0060] More specifically, in order to ensure the sealing of the connection, sealing rings are provided between the square cover 11 and the spline housing 12, between the spline housing 12 and the oil cavity housing 13, and between the oil cavity housing 13 and the piston 3.

[0061] Furthermore, a sealing ring is provided on both sides of the pressure chamber 8 between the oil chamber housing 13 and the piston 3 to prevent leakage of the pressure medium in the pressure chamber 8.

[0062] Specifically, the end cap 14 is provided with multiple mounting bolts 15 for connecting to the main body of the coal mining machine.

[0063] Specifically, the brake also includes a brake closing assembly, which is disposed in the housing and connected to the piston 3. The brake closing assembly can lock the piston 3 in the position where the brake friction pad assembly 2 is released. The brake closing assembly is used to lock the position of the piston 3, which can press the elastic element 4, release the static friction pad 21 and the dynamic friction pad 22, and allow the output shaft of the coal mining machine to rotate freely, which is equivalent to turning off the braking function of the brake. When the braking function is not needed, there is no need to disassemble the brake.

[0064] More specifically, the brake deactivation assembly includes a locking bolt 7, which is movably inserted through the housing. The head of the locking bolt 7 is located outside the housing, and the tail end is threadedly connected to the piston 3. In this embodiment, the locking bolt 7 is movably inserted through the end cap 14, with its head located outside the end cap 14 and its tail end threadedly connected to the piston 3. By tightening the locking bolt 7, the distance between the piston 3 and the end cap 14 can be adjusted, thereby adjusting the length of the elastic element 4 and achieving the function of deactivating the brake.

[0065] During use, brakes may malfunction and fail to disengage due to various reasons. These reasons include: First, insufficient oil pressure or internal structural jamming may prevent the piston from moving to the position where it is completely disengaged from the friction plates, thus preventing brake release. Second, even if the piston moves to the position where it is completely disengaged from the friction plates, the high temperature of the coal mining machine's brake may cause the friction plates to stick together, preventing smooth release and resulting in brake lock-up. In existing technology, it is difficult to detect brake malfunctions during the coal mining machine's movement. Continuing to move the machine can easily damage the traveling wheels. Furthermore, even after the malfunction is detected, the cause cannot be quickly determined, requiring the entire brake system to be disassembled for inspection, leading to high replacement time and costs.

[0066] To address the aforementioned issues, the brake provided in this embodiment further includes a motion sensor to detect whether the output shaft is rotating. If, after the brake performs a release operation, the motion sensor detects that the output shaft remains stationary, the release operation is deemed to have failed, indicating a brake failure. Then, the position data of the piston 3 is acquired via the displacement sensor 5, and this position data is compared with X... TBy comparing the two values, if the difference is within the allowable error range, it is inferred that the movement of piston 3 is normal, meaning the cause of the fault is the second reason mentioned above. If the difference exceeds the allowable error range, it is inferred that the movement of piston 3 is abnormal, meaning the cause of the fault is the first reason mentioned above. This helps maintenance personnel to quickly determine the cause of the fault. Therefore, the brake provided in this embodiment can detect faults quickly, determine the cause of the fault rapidly, accurately pinpoint the location of the fault, and improve maintenance efficiency and cost.

[0067] Furthermore, in this embodiment, the motion sensor is simultaneously connected to both the controller and the display. The controller acquires the signal detected by the motion sensor. If the output shaft is rotating, the display shows "Brake Release Successful"; if the output shaft is still stationary, the display shows "Brake Release Failed" to provide a stop warning. Simultaneously, the controller acquires the position data of the piston 3 measured by the displacement sensor 5 and compares this position data with X... T By comparison, if the difference between the two is within the allowable error range, the display shows the cause of the fault as the second cause mentioned above; if the difference exceeds the allowable error range, the display shows the cause of the fault as the first cause mentioned above. Therefore, the brake provided in this embodiment can automatically detect faults and automatically determine the cause of the fault. Further, another embodiment of the present invention provides a control system for controlling the aforementioned brake. The control system is communicatively connected to the displacement sensor 5. The control system can acquire position data and determine whether the piston 3 is fully open and whether the actual wear of the brake friction pad assembly 2 has reached the set wear amount based on the position data.

[0068] Because the control system provided in this embodiment controls the brake provided in any of the above embodiments, the control system can acquire position data and determine whether the piston 3 is fully open and whether the actual wear of the brake friction pad assembly 2 has reached the set wear amount based on the position data. Therefore, this control system can delay the wear of the brake friction pad assembly and accurately determine when the brake friction pad assembly 2 needs to be replaced, thereby ensuring safe downhole operations and avoiding waste of resources and time.

[0069] Furthermore, another embodiment of the working machinery provided by the present invention includes: the brake described above.

[0070] Specifically, the working machinery includes a main body and an output shaft. The brake is mounted on the housing at the high-speed shaft end of the traction unit of the main body of the working machinery via mounting bolts 15. The output shaft is connected to the shaft connecting sleeve 6. For example, the working machinery can be mining machinery, such as coal mining machines, tunneling machines, and mining dump trucks.

[0071] Since the working machine provided in this embodiment has the brake provided in any of the above embodiments, the working machine has all the beneficial effects of the brake provided in any of the above embodiments, which will not be repeated here.

[0072] It should be noted that since existing operating machinery is equipped with an operating machinery control system and an operating machinery display system, the function of the controller in the aforementioned brake can be realized through the existing operating machinery control system, and the function of the display in the aforementioned brake can be realized through the existing operating machinery display system, thus eliminating the need for the controller and display in the brake.

[0073] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0076] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "exemplary embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A brake, characterized in that, include: case; Brake friction pad assembly (2) is disposed within the housing; A piston (3) is movably disposed in the housing along its axial direction. A pressure chamber (8) is provided on one side of the piston (3) in the housing. The pressure chamber (8) is used to fill the pressure medium. An elastic element (4) is disposed inside the housing and abuts against the side of the piston (3) away from the pressure chamber (8). The elastic element (4) or the pressure medium can drive the piston (3) to move toward the brake friction pad assembly (2) and press the brake friction pad assembly (2) to achieve braking. The pressure medium or the elastic element (4) can drive the piston (3) to move toward the direction away from the brake friction pad assembly (2) to release the brake. A displacement sensor (5) is disposed in the housing, and its detection end abuts against the piston (3) for detecting the position data of the piston (3); The brake also includes a shaft connecting sleeve (6) and a motion sensor. The shaft connecting sleeve (6) is rotatably disposed in the housing about its axial direction and is used to connect the output shaft. When the brake friction pad group (2) is pressed, it brakes the shaft connecting sleeve (6). The motion sensor is communicatively connected to the controller and the display, and is used to detect whether the output shaft is rotating. When the brake performs the release operation, if the motion sensor detects that the output shaft is stationary, the display is used to display the words "Brake release failed". The controller is used to obtain the position data of the piston (3) measured by the displacement sensor (5), compare the position data with the open position, and if the difference between the position data and the open position exceeds the error allowable range, the display is used to display the first reason for the fault; if the difference between the position data and the open position is within the error allowable range, the display is used to display the second reason for the fault. The first reason is that the brake cannot be released due to insufficient oil pressure or internal structural jamming; the second reason is that the brake cannot be released due to the adhesion of the friction pads in the brake friction pad group (2) caused by high temperature.

2. The brake as claimed in claim 1, characterized in that, The brake friction pad assembly (2) includes at least one static friction pad (21) and at least one dynamic friction pad (22). The static friction pad (21) is connected to the inner wall of the housing, and the dynamic friction pad (22) is connected to the circumferential outer wall of the shaft connecting sleeve (6). At least one static friction pad (21) and at least one dynamic friction pad (22) are alternately arranged along the axial direction of the shaft connecting sleeve (6).

3. The brake as described in claim 1, characterized in that, The brake also includes a brake shut-off assembly disposed in the housing and connected to the piston (3), which can lock the piston (3) in the position where the brake friction pad assembly (2) is released.

4. The brake as described in claim 3, characterized in that, The brake closing assembly includes a locking bolt (7), which is movably inserted through the housing. The head of the locking bolt (7) is located outside the housing, and the tail end is threaded to the piston (3).

5. The brake as claimed in claim 1, characterized in that, The brake also includes a controller, and the displacement sensor (5) is communicatively connected to the controller. The controller can calculate the actual wear of the brake friction pad assembly (2) based on the position data of the piston (3).

6. The brake as claimed in claim 5, characterized in that, The brake also includes a display, which is communicatively connected to the controller. The display is used to show the actual wear amount, and when the actual wear amount reaches the set wear amount, the display can show a replacement prompt.

7. The brake as described in any one of claims 1 to 6, characterized in that, The pressure chamber (8) is formed by the shell and the piston (3), and the outer wall of the shell has a medium inlet and a medium outlet respectively connected to the pressure chamber (8).

8. A control system, characterized in that, For controlling the brake as described in any one of claims 1 to 4, characterized in that the control system and the displacement sensor (5) are communicatively connected, the control system can acquire the position data, and determine whether the piston (3) is fully open based on the position data, and determine whether the actual wear of the brake friction pad assembly (2) has reached the set wear amount.

9. A type of operating machinery, characterized in that, include: The brake as claimed in any one of claims 1 to 7.

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