Wedge brake and automobile
By designing wear sensors in wedge brakes, contact and disconnection between the guide rod and the conductive parts, the wear of the brake friction plate is monitored in real time, and the problem of the inaccurate measurement of the wear of the brake friction plate in the prior art is solved, which improves braking safety and saves monitoring costs.
Patent Information
- Application Number
- CN202420184287.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-25
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-01-25
AI Technical Summary
In existing wedge brakes, the wear of the brake friction plate cannot be accurately measured, resulting in a decrease in braking torque and imbalance in the left and right wheels, resulting in serious brake problems such as long braking distance and brake deviation.
A wear sensor is designed, including a guide shell, a guide rod and a conductive member. Through the contact and disconnection of the guide rod and the conductive member, a signal is transmitted to the vehicle-mounted ECU to monitor the wear of the brake friction plate in real time.
It improves the accuracy of brake friction plate wear measurement, prompt alarm replacement, improves the brake safety of the car, and saves monitoring costs.
Smart Images
Figure CN222615882U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensors, in particular to a wedge-type brake and a car. Background Art
[0002] As the most important safety equipment for modern vehicles, wedge brakes are widely used on various types of vehicles. Since the brake pads of wedge brakes are enclosed inside the wheel rims of vehicles, the thickness of the brake pads can only be visually inspected through the observation hole, and it is impossible to accurately measure and detect wear problems in time with the help of tools. If the brake pads are worn out and not replaced in time, the braking torque will drop significantly, the braking torque of the left and right wheels will be unbalanced, and serious braking problems such as long braking distance and brake deviation will occur, which will bring great hidden dangers to driving safety. Utility Model Content
[0003] The purpose of the utility model is to provide a wear sensor and a wedge brake, which can at least solve some of the defects in the prior art.
[0004] To achieve the above-mentioned purpose, an embodiment of the utility model provides the following technical solution: a wear sensor, comprising a wear sensor, a base and a fixed retaining ring, the wear sensor comprising a guide shell, a guide rod and a conductive part are arranged in the guide shell, the guide rod is telescoped in the guide shell and slides in contact with the conductive part, the conductive part is connected with a connector for transmitting signals to an on-board ECU, the wear sensor is fixedly mounted on the base, and part of the rod body of the guide rod is constrained to the guide shell by the fixed retaining ring.
[0005] Furthermore, the base has a mounting plane for mounting the wear sensor, the mounting plane has a threaded hole, and the wear sensor is fixedly mounted on the mounting plane by screws.
[0006] Furthermore, the conductive member includes a PCB board, and a brush is provided on the tail end of the guide rod located in the guide shell. The brush is in sliding contact with the carbon oil on the PCB board, and the PCB board is connected to the connector through an electric wire.
[0007] Furthermore, a drag piece is formed by injection molding on the tail end, and the brush is arranged on the drag piece.
[0008] Furthermore, a slide groove is provided in the guide shell, and an opening is provided at the end of the guide shell, the opening is connected with the slide groove, and the guide rod is slidably arranged in the slide groove.
[0009] Furthermore, the opening of the guide shell is inwardly recessed to form a groove, and a bushing is provided in the groove.
[0010] Furthermore, a dust cover is provided at the opening.
[0011] Furthermore, a retaining ring is provided at the head end of the guide rod, a spring is sleeved on the guide rod, and the spring is located between the retaining ring and the guide shell.
[0012] Furthermore, it also includes a piston and a push rod driving the piston to rotate, the push rod on the piston is screwed out and moves outward, and the guide rod moves with the push rod to extend out of the guide shell.
[0013] An embodiment of the utility model provides another technical solution: an automobile, comprising a brake friction pad and a wedge brake, wherein a gap is provided between the brake friction pad and the wedge brake, the wedge brake comprises a wear sensor, a piston and a push rod, the wear sensor comprises a guide shell, a guide rod and a conductive member are arranged in the guide shell, the guide rod is telescoped in the guide shell and is in sliding contact with the conductive member, when the gap increases, the push rod moves forward to drive the piston to rotate, the push rod on the piston is screwed out and moves outward, and the guide rod moves with the push rod to extend out of the guide shell.
[0014] Compared with the prior art, the utility model has the beneficial effect that the wear sensor is used in the wedge brake to perform wear alarm, which can not only improve the measurement accuracy, but also can be used repeatedly, thereby improving safety and saving monitoring costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A schematic diagram of the structure of a wear sensor for a wedge-type brake provided in an embodiment of the utility model;
[0016] Figure 2 A cross-sectional schematic diagram of a wear sensor for a wedge-type brake provided in an embodiment of the utility model;
[0017] Figure 3 A schematic structural diagram of a wedge brake provided by an embodiment of the utility model from a first perspective (partial cross-section);
[0018] Figure 4 A second perspective structural schematic diagram of a wedge-type brake provided by an embodiment of the utility model (partial cross-section);
[0019] In the figure numbers: 10-wear sensor; 100-guide shell; 101-guide rod; 102-PCB board; 103-wire; 104-connector; 105-retaining ring; 106-spring; 107-dust cover; 108-bushing; 109-brush; 110-drag piece; 111-base; 20-base; 30-fixed retaining ring; 40-thrust rod; 50-piston; 60-push rod; 70-screw. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the utility model provides a wedge brake, including a wear sensor 10, a base 20 and a fixed retaining ring 30. The wear sensor includes a guide shell 100, a guide rod 101 and a conductive member are arranged in the guide shell 100, the guide rod 101 is telescopic in the guide shell 100 and slides on the conductive member, the conductive member is connected with a connector 104 for transmitting a signal to a vehicle-mounted ECU, the wear sensor 10 is fixedly mounted on the base 20, and a part of the rod body of the guide rod 101 is constrained by the fixed retaining ring 30 into the guide shell 100. The use of a wear sensor for wear alarm in a wedge brake can not only improve the measurement accuracy, but also can be used repeatedly, improve safety and save monitoring costs. Specifically, a retractable guide rod 101 is used. When the guide rod 101 contacts the conductive member, it is electrically connected. At this time, the conductive member can transmit the conduction signal to the vehicle-mounted ECU through the connector 104. This state can be set as a normal state, which means that the wear degree of the brake friction pad matched with the wedge brake still meets the requirements. As the degree of wear increases, the guide rod 101 will Figure 4 As shown by the arrow, the guide rod 101 moves outward, or in other words, the guide rod 101 moves in a direction away from the guide shell 100 to slide in the guide shell 100 until the guide rod 101 no longer contacts the conductive part. Here, the connection is disconnected, and the connector 104 no longer transmits a conduction signal to the vehicle-mounted ECU, which indicates that the wear degree of the brake friction pad exceeds the range value, indicating that the brake friction pad needs to be replaced. In the initial state, after the wear sensor 10 is fixed on the base 20, the guide rod 101 is constrained by the fixed retaining ring 30, which can constrain the guide rod 101 of the wear sensor 10 in the guide shell 100. As the wear changes, the constraining ability of the fixed retaining ring 30 becomes worse, and the guide rod 101 of the wear sensor will extend out of the guide shell 100, realizing the above-mentioned sliding process.
[0022] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The base 20 has a mounting plane for the wear sensor 10 to be installed, and the mounting plane has threaded holes. The wear sensor 10 is fixedly installed on the mounting plane by screws. Since the wear sensor 10 needs to be installed at a position close to the brake friction pad, and the base of the existing wedge brake has arched ribs at the position where the wear sensor is installed, it is not convenient to install the wear sensor. Therefore, the base is improved and designed into a plane, and threaded holes are designed on the plane, so that the wear sensor can be conveniently fixedly installed on the mounting plane by screws.
[0023] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the conductive member includes a PCB board 102, and a brush 109 is provided on the tail end of the guide rod 101 located in the guide shell 100, and the brush 109 is in sliding contact with the carbon oil on the PCB board 102, and the PCB board 102 is connected to the connector 104 through a wire 103. In this embodiment, the conductive method adopts the form of sliding contact between the brush 109 and the carbon oil on the PCB board 102. When the brush 109 contacts the carbon oil film, it is conductive, and when the brush 109 slowly slides outside the carbon oil film, it is disconnected. Of course, in addition to adopting this conduction and disconnection method, other forms of sliding contact can also be adopted, because only two states of disconnection and conduction are required, and no other changes are required. There are many ways to achieve it. In addition to the carbon oil film on the PCB board 102 as a sliding basis, it can also be achieved by adopting a long strip of conductive sheet, etc., and the applicant does not limit it here.
[0024] To further optimize the above solution, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The tail end is injection molded with a drag piece 110, and the brush 109 is arranged on the drag piece 110. In this embodiment, the drag piece 110 is injection molded at the tail end, which can flexibly limit the installation position of the brush 109 and also facilitate the installation of the brush 109.
[0025] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, a slide groove is provided in the guide shell 100, and an opening is provided at the end of the guide shell 100, the opening is connected with the slide groove, and the guide rod 101 is slidably set in the slide groove. The opening of the guide shell 100 is recessed inward to form a groove, and a bushing 108 is provided in the groove. The bushing 108 is spaced apart from the slide groove. In this embodiment, a slide groove can be designed in the guide shell 100 to facilitate the sliding of the guide rod 101, and the extension direction of the slide groove is as shown in FIG. Figure 4 The purpose of designing the bushing 108 is to stably install the guide rod 101 and facilitate its sliding. The bushing 108 is arranged at intervals with the slide groove to limit the design size of the slide groove.
[0026] To further optimize the above solution, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The opening is provided with a dust cover 107. In this embodiment, the dust cover 107 can reduce dust from entering the guide housing 100.
[0027] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a retaining ring 105 is provided at the head end of the guide rod 101, and a spring 106 is sleeved on the guide rod 101, and the spring 106 is located between the retaining ring 105 and the guide shell 100. In this embodiment, the extension and contraction of the guide rod 101 can be achieved by using the spring 106, and the fixed retaining ring 30 mentioned above will constrain the guide rod 101, that is, compress the guide rod 101. When the compression degree of the fixed retaining ring 30 changes, the guide rod 101 will move as shown in the figure. Figure 4 The brush 109 on the guide rod 101 extends in the direction of the arrow until it leaves the carbon oil on the PCB board 102.
[0028] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The wear sensor 10 includes a base 111 having a screw hole. The base 111 is fixedly mounted on the base 20 by screws 70 , and the screws are screwed into the screw holes of the base 111 and the threaded holes of the base 20 respectively.
[0029] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The wedge brake also includes a piston 50 and a push rod 60 that drives the piston 50 to rotate. The push rod 40 on the piston 50 is screwed out and moves outward, and the guide rod 101 moves with the push rod 40 to extend out of the guide shell 100. So far, the working principle of the wedge brake is as follows: the drag piece 110 on the guide rod 101 is welded with a brush 109, and the brush 109 contacts the carbon oil on both sides of the PCB board 102. The PCB board 102 is connected to the wire 103. The wire 103 is connected to the connector 104. A complete circuit is formed, and a drag piece 110 is injection molded at the tail of the guide rod 101. The guide rod 101 is installed in the slide groove of the shell and passes through the bushing 108 on the guide shell 100. The spring 106 is fixed on the guide rod 101 under the action of the retaining ring 105. When the product is installed on the wedge brake, the guide rod 101 is pushed to the bottom of the base 111 (that is, the initial installation position of the product). The brush 109 on the guide rod 101 is in electrical contact with the carbon oil area on the PCB. The product is in a conducting state. When the friction plate is worn out, the guide rod 101 moves to the top of the base 111 driven by the spring 106. The brush 109 on the drag plate 110 of the guide rod 101 is separated from the carbon oil on the PCB board 102, forming a circuit break, and realizing an alarm (the alarm position of the product). The wear sensor 10 is installed on the base 20 of the wedge brake. It is locked and fixed on the base 20 of the brake with screws 70. The guide rod 101 of the wear sensor 10 is compressed to the bottom by the fixed retaining ring 30 of the brake (the initial position of the product installation). The brush 109 of the wear sensor 10 is on the PCB board 102, and the product is always in a conducting state. When the brake friction plate is worn, the gap between the friction plate and the brake increases, and the push rod 60 of the brake moves forward, driving the piston 50 in the brake to rotate, and the piston sleeve rotates with the piston 50. The push rod 40 on the piston 50 is screwed out and moves outward. Under the return force of the spring 106, the guide rod 101 moves outward with the brake push rod 40, which is a replacement push rod. When the brake friction pad is worn out. When the brake push rod 40 moves outward to the design value under the rotation of the piston 50, the guide rod 101 is pulled to the top of the guide shell 100 under the return force of the spring 106, and the brush 109 on the guide rod 101 is separated from the contact point on the PCB board 102. The circuit is disconnected. The warning light in the cab lights up, prompting the driver to replace the brake friction pad.
[0030] See also Figure 1 , Figure 2 , Figure 3 and Figure 4The utility model provides an automobile, including a brake friction pad and a wedge brake, wherein there is a gap between the brake friction pad and the wedge brake, and the wedge brake includes a wear sensor 10, a piston 50 and a push rod 60. The wear sensor 10 includes a guide housing 100, wherein a guide rod 101 and a conductive member are arranged in the guide housing 100, wherein the guide rod 101 is telescopic in the guide housing 100 and slides in contact with the conductive member. When the gap increases, the push rod 60 moves forward to drive the piston 50 to rotate, and the push rod 40 on the piston 50 is screwed out and moves outward, and the guide rod 101 moves with the push rod 40 to extend out of the guide housing 100. In this embodiment, the above-mentioned wedge brake can be used in an automobile. When the brake friction pad is worn, the gap between the friction pad and the brake increases, and the push rod 60 of the brake moves forward to drive the piston 50 in the brake to rotate, and the piston sleeve rotates with the piston 50. The push rod 40 on the piston 50 is screwed out and moves outward. Under the return force of the spring 106, the guide rod 101 moves outward with the brake push rod 40, which is a replacement push rod. When the brake friction pad is worn out. When the brake push rod 40 moves outward to the design value under the rotation of the piston 50, the guide rod 101 is pulled to the top of the guide shell 100 under the return force of the spring 106, and the brush 109 on the guide rod 101 is separated from the contact point on the PCB board 102. The circuit is disconnected. The warning light in the cab lights up, prompting the driver to replace the brake friction pad.
[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A wedge brake, characterized in that: It includes a wear sensor, a base and a fixed retaining ring. The wear sensor includes a guide shell. A guide rod and a conductive member are arranged in the guide shell. The guide rod is telescopic in the guide shell and slides in contact with the conductive member. The conductive member is connected with a connector for transmitting signals to an on-board ECU. The wear sensor is fixedly mounted on the base. Part of the guide rod is constrained to the guide shell by the fixed retaining ring.
2. The wedge brake according to claim 1, characterized in that: The base has a mounting plane for mounting the wear sensor, the mounting plane has a threaded hole, and the wear sensor is fixedly mounted on the mounting plane by screws.
3. The wedge brake according to claim 1, characterized in that: The conductive member comprises a PCB board, and a brush is arranged on the tail end of the guide rod located in the guide shell. The brush is in sliding contact with the carbon oil on the PCB board, and the PCB board is connected to the connector through an electric wire.
4. The wedge brake according to claim 3, characterized in that: A drag piece is formed by injection molding on the tail end, and the brush is arranged on the drag piece.
5. The wedge brake according to claim 1, characterized in that: A slide groove is arranged in the guide shell, and an opening is arranged at the end of the guide shell. The opening is connected with the slide groove, and the guide rod is slidably arranged in the slide groove.
6. The wedge brake according to claim 4, characterized in that: The opening of the guide shell is inwardly recessed to form a groove, and a bushing is arranged in the groove.
7. The wedge brake according to claim 5, characterized in that: A dust cover is provided at the opening.
8. The wedge brake according to claim 1, characterized in that: A retaining ring is arranged at the head end of the guide rod, and a spring is sleeved on the guide rod. The spring is located between the retaining ring and the guide shell.
9. The wedge brake according to claim 1, characterized in that: It also includes a piston and a push rod driving the piston to rotate. The push rod on the piston is screwed out to move outward, and the guide rod moves with the push rod to extend out of the guide shell.
10. An automobile, comprising a brake friction pad, characterized in that: It also includes a wedge brake, a gap is formed between the brake friction pad and the wedge brake, the wedge brake includes a wear sensor, a piston and a push rod, the wear sensor includes a guide shell, a guide rod and a conductive member are arranged in the guide shell, the guide rod is telescoped in the guide shell and slides in contact with the conductive member, when the gap increases, the push rod moves forward to drive the piston to rotate, the push rod on the piston is screwed out and moves outward, and the guide rod moves with the push rod to extend out of the guide shell.