Protection device of disc brake

Abstract

The utility model provides a protection device of a disc brake, and belongs to the technical field of brakes. The protection device comprises a first proximity switch which is arranged at the magnet yoke, a signal transmitting end of the first proximity switch penetrates through the armature and right faces the side face, not covering the friction plate, of the main body disc, and the first proximity switch is used for detecting the first distance between the first proximity switch and the main body disc; the second proximity switch is arranged at the end cover, the signal transmitting end of the second proximity switch directly faces the side face, not covering the friction plate, of the main body disc, and the second proximity switch is used for detecting the second distance between the second proximity switch and the main body disc; and the alarm is used for giving an alarm when the first distance is smaller than a first threshold value or the second distance is smaller than a second threshold value. The protection device of the disc brake can guarantee braking safety.

Description

A protective device for a disc brake Technical Field

[0001] This application relates to the field of brake technology, and more particularly to a protection device for a disc brake. Background Technology

[0002] Excessive wear of the friction pads in the brake disc can reduce braking torque, creating safety hazards and potentially leading to accidents.

[0003] In existing technologies, the wear of friction pads is typically determined by measuring their total thickness. When the total thickness is less than a certain value, excessive friction is considered. However, in disc brakes, both sides of the friction pad participate in braking: one side rubs against the traction machine, and the other side rubs against the armature. In actual use, the two sides may sometimes wear differently. Therefore, existing methods that measure the total thickness cannot effectively identify this situation, and excessive wear on one braking surface can create safety hazards. Summary of the Invention

[0004] One objective of this invention is to provide a protective device for disc brakes that ensures braking safety.

[0005] Another objective of this invention is to ensure the original effective friction area of ​​the brake disc.

[0006] A further objective of this invention is to ensure the accuracy of the target proximity switch measurement and the service life of the target proximity switch.

[0007] Another objective of this invention is to reduce the size of the disc brake, reduce the braking response time, lower the operating noise of the disc brake, and eliminate or mitigate resonance.

[0008] An embodiment of this utility model provides a protective device for a disc brake. The disc brake includes a magnetic yoke, an armature, and a brake disc arranged sequentially. The brake disc is used to brake the end cover of a traction machine. The brake disc includes a main disc and friction pads. The friction pads include a first friction portion and a second friction portion respectively disposed on both sides of the edge region of the main disc. The first friction portion and the second friction portion are respectively positioned opposite the armature and the end cover. The protective device includes:

[0009] A first proximity switch is disposed at the magnetic yoke, with its signal transmitting end passing through the armature and facing the side of the main body disk that does not cover the friction pad. The first proximity switch is used to detect a first distance between itself and the main body disk.

[0010] A second proximity switch is disposed at the end cap with its signal transmitting end facing the side of the main body disk that does not cover the friction pad. The second proximity switch is used to detect a second distance between itself and the main body disk.

[0011] An alarm is used to sound an alarm when the first distance is less than a first threshold or the second distance is less than a second threshold.

[0012] Optionally, the alarm may include a buzzer and / or an indicator light.

[0013] Optionally, the protective device for the disc brake further includes a protective structure that at least separates one side of the target proximity switch from the friction pad, wherein the target proximity switch is either the first proximity switch or the second proximity switch.

[0014] Optionally, the protective structure is arranged around the target proximity switch.

[0015] Optionally, the protective structure is fixedly disposed at the armature or the end cap.

[0016] Optionally, the target proximity switch includes a through portion and threads at both ends of the through portion, the two ends of the through portion being secured by nuts after passing through the end cap or the magnetic yoke.

[0017] Optionally, the protective structure is integrally manufactured with the nut located near the brake disc.

[0018] Optionally, the distance between the protective structure and the main body panel is less than the distance between the target proximity switch and the main body panel.

[0019] According to a first aspect of this utility model, by setting a first proximity switch and a second proximity switch on both sides of the brake disc respectively, the wear amount of the friction pad is indirectly obtained by directly detecting the distance between the friction pad and the main body of the brake disc, thereby effectively monitoring the wear amount on both sides of the friction pad. When excessive wear occurs on either side of the friction pad, an alarm is issued in time to prompt replacement or inspection of the wear condition of the brake disc. This avoids the problem of no alarm prompt when the friction pad is excessively worn on one side but the total thickness still meets the requirements, thereby ensuring braking safety.

[0020] Furthermore, by setting the first proximity switch and the second proximity switch at the position of the main body disc directly opposite the brake disc, the installation holes are avoided from being opened directly opposite the armature or end cap of the friction pad, which would reduce the effective friction area. That is, the setting position of the proximity switch in this embodiment can ensure the original effective friction area of ​​the brake disc.

[0021] According to a second aspect of this utility model, by providing a protective structure between the target proximity switch and the friction plate, the friction plate and the target proximity switch can be separated, effectively blocking the debris generated by friction between the friction plate and the end cover or armature during braking, thereby protecting the target proximity switch from damage, preventing friction debris from obscuring the test end or covering the main body plate, and ensuring the accuracy of the target proximity switch measurement and the service life of the target proximity switch.

[0022] Furthermore, by setting the distance between the protective structure and the main disc to be less than the distance between the target proximity switch and the main disc, when the friction pad is damaged, causing a decrease in the distance between the armature and the brake disc or between the end cover and the brake disc, the protective structure can contact the main disc before the target proximity switch. This prevents the target proximity switch from being directly damaged due to excessive wear during braking, thereby extending the service life of the target proximity switch. Furthermore, by providing a chamfer or rounding at the connection between the side wall of the groove and the brake surface, it is beneficial for the elastic element to push out of the brake disc. Attached Figure Description

[0023] Figure 1 is a cross-sectional view of the protective device according to an embodiment of the present invention when it is assembled with a disc brake and a traction machine.

[0024] Figure 2 is a magnified view of part A in Figure 1;

[0025] Figure 3 is a partial cross-sectional view of the protective device according to another embodiment of the present invention when it is assembled with a disc brake and a traction machine.

[0026] Figure label:

[0027] Disc brake 10, magnetic yoke 11, armature 12, brake disc 13, traction machine 20, end cover 21, main disc 131, friction plate 132, first friction part 101, second friction part 102, first proximity switch 31, second proximity switch 32, protective structure 33, through part 311, nut 312. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0030] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the spirit of this disclosure.

[0031] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article indicates that the preceding and following related objects have an "or" relationship.

[0032] In this embodiment of the invention, "multiple" refers to two or more. The descriptions of "first," "second," etc., appearing in this embodiment of the invention are for illustrative purposes and to distinguish the objects being described; they do not indicate any order and do not represent a specific limitation on the number of items in this embodiment of the invention, nor do they constitute any limitation on this embodiment of the invention.

[0033] Figure 1 is a cross-sectional view of the protective device according to an embodiment of the present invention, assembled with a disc brake 10 and a traction machine 20. Figure 2 is a partial enlarged view of point A in Figure 1. As shown in Figures 1 and 2, the protective device of this application is used in a disc brake 10, which includes a magnetic yoke 11, an armature 12, and a brake disc 13 arranged sequentially. Of course, as in the prior art, the disc brake 10 also includes necessary components such as a coil and a brake spring. The brake disc 13 is used to brake the end cover 21 of the traction machine 20. The brake disc 13 includes a main disc 131 and friction pads 132. Optionally, the main disc is an aluminum disc. The friction pads 132 include a first friction portion 101 and a second friction portion 102 respectively disposed on both sides of the edge region of the main disc 131. The first friction portion 101 and the second friction portion 102 are respectively facing the armature 12 and the end cover 21. In this embodiment, the protective device includes a first proximity switch 31, a second proximity switch 32, and an alarm (not shown). A first proximity switch 31 is located at the magnetic yoke 11, with its signal transmitting end passing through the armature 12 and facing the side of the main body disk 131 not covered by the friction plate 132. The first proximity switch 31 is used to detect a first distance between itself and the main body disk 131. A second proximity switch 32 is located at the end cap 21, with its signal transmitting end facing the side of the main body disk 131 not covered by the friction plate 132. The second proximity switch 32 is used to detect a second distance between itself and the main body disk 131. An alarm is used to sound an alarm when the first distance is less than a first threshold or the second distance is less than a second threshold. For example, the alarm may include a buzzer and / or an indicator light. The buzzer can emit an audible alarm, and the indicator light can emit a visual alarm. Here, the alarm is triggered based on the measured values ​​of the first proximity switch 31 and the second proximity switch 32, which is easily implemented using existing technology in the art and will not be elaborated here. In one embodiment, the alarm can respond to the first proximity switch 31 and the second proximity switch 32. In another embodiment, the number of alarms is two, each corresponding to the corresponding first proximity switch 31 or second proximity switch 32. This is not a limitation.

[0034] In this embodiment, a first proximity switch 31 and a second proximity switch 32 are respectively set on both sides of the brake disc 13. The wear of the friction pad 132 is indirectly obtained by directly detecting the distance between the friction pad 132 and the main body disc 131 of the brake disc 13. This effectively monitors the wear on both sides of the friction pad 132. When excessive wear occurs on either side of the friction pad 132, an alarm is issued in time to prompt replacement or inspection of the wear condition of the brake disc 13. This avoids the problem of no alarm prompt when the friction pad 132 is excessively worn on one side but the total thickness still meets the requirements, thereby ensuring braking safety.

[0035] Furthermore, by setting the first proximity switch 31 and the second proximity switch 32 at the position of the main body disc 131 directly opposite the brake disc 13, the installation hole is avoided directly opening at the armature 12 or end cap 21 directly opposite the friction plate 132, thus reducing the effective friction area. That is, the setting position of the proximity switches in this embodiment can ensure the original effective friction area of ​​the brake disc 13.

[0036] Figure 3 is a partial cross-sectional view of the protective device according to another embodiment of the present invention, when it is assembled with a disc brake 10 and a traction machine 20. As shown in Figure 3, in another embodiment, the protective device further includes a protective structure 33, which at least separates one side of the target proximity switch from the friction plate 132. The target proximity switch is either a first proximity switch 31 or a second proximity switch 32. The protective structure 33 is arranged around the target proximity switch. The target proximity switch includes a through portion 311 and threads located at both ends of the through portion 311. The two ends of the through portion 311 after passing through the end cap 21 or the magnetic yoke 11 are fixed by nuts 312. In this embodiment, the protective structure 33 provided at the end cap 21 is integrally manufactured with the nut 312 near the brake disc 13. The protective structure 33 provided at the armature 12 is threadedly connected to the mounting hole of the armature 12.

[0037] Of course, in other embodiments not shown, the protective structure 33 can also be in the form of a baffle, used only to separate the target proximity switch and the friction plate 132. The protective structure 33 can also be set at the armature 12 and the end cap 21 by other means such as threaded connection or snap-fit, which is not limited here.

[0038] This embodiment provides a protective structure 33 between the target proximity switch and the friction plate 132, which can separate the friction plate 132 and the target proximity switch, effectively blocking the debris generated by the friction between the friction plate 132 and the end cover 21 or armature 12 during braking. This protects the target proximity switch from damage and prevents friction debris from obscuring the test end or covering the main body disk 131, ensuring the accuracy of the target proximity switch measurement and the service life of the target proximity switch.

[0039] Furthermore, by manufacturing the protective structure 33 integrally with the nut 312 for connecting the target proximity switch, the number of parts can be reduced while ensuring that the relative position between the protective structure 33 and the target proximity switch remains unchanged.

[0040] In a further embodiment, the distance between the protective structure 33 and the main body disk 131 is less than the distance between the target proximity switch and the main body disk 131.

[0041] In this embodiment, when the friction plate 132 is damaged, causing the distance between the armature 12 and the brake disc 13 or the distance between the end cover 21 and the brake disc 13 to decrease, the protection structure 33 can contact the main body disc 131 before the target proximity switch, thereby preventing the target proximity switch from being directly damaged due to excessive wear during braking, thus extending the service life of the target proximity switch.

[0042] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A protective device for a disc brake, the disc brake comprising a magnetic yoke, an armature, and a brake disc arranged sequentially, the brake disc being used to brake an end cover of a traction machine, the brake disc comprising a main body disc and friction pads, the friction pads comprising a first friction portion and a second friction portion respectively disposed on both sides of the edge region of the main body disc, the first friction portion and the second friction portion respectively facing the armature and the end cover, characterized in that, The protective device includes: a first proximity switch, disposed at the magnetic yoke with its signal transmitting end passing through the armature and facing the side of the main body disk not covered by the friction plate, the first proximity switch being used to detect a first distance between itself and the main body disk; a second proximity switch, disposed at the end cap with its signal transmitting end facing the side of the main body disk not covered by the friction plate, the second proximity switch being used to detect a second distance between itself and the main body disk; and an alarm, used to issue an alarm when the first distance is less than a first threshold or the second distance is less than a second threshold.

2. The protection device for the disc brake according to claim 1, characterized in that, The alarm includes a buzzer and / or an indicator light.

3. The protection device for a disc brake according to claim 1, characterized in that, It also includes a protective structure that at least separates one side of the target proximity switch from the friction plate, the target proximity switch being either the first proximity switch or the second proximity switch.

4. The protection device for the disc brake according to claim 3, characterized in that, The protective structure is arranged around the target proximity switch.

5. The protection device for the disc brake according to claim 3, characterized in that, The protective structure is fixedly installed at the armature or the end cap.

6. The protection device for a disc brake according to claim 3, characterized in that, The target proximity switch includes a through portion and threads located at both ends of the through portion, and the two ends of the through portion after passing through the end cap or the magnetic yoke are fixed by nuts.

7. The protection device for a disc brake according to claim 6, characterized in that, The protective structure is integrally manufactured with the nut located near the brake disc.

8. The protection device for a disc brake according to claim 3, characterized in that, The distance between the protective structure and the main body panel is less than the distance between the target proximity switch and the main body panel.

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