CN210106461U - Drum brake wear alarm system and mobile crane - Google Patents
Drum brake wear alarm system and mobile crane Download PDFInfo
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- CN210106461U CN210106461U CN201920562322.3U CN201920562322U CN210106461U CN 210106461 U CN210106461 U CN 210106461U CN 201920562322 U CN201920562322 U CN 201920562322U CN 210106461 U CN210106461 U CN 210106461U
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- brake
- plastic cap
- wear
- controller
- brake lining
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Abstract
The utility model discloses a drum brake wear alarm system, which comprises a wear sensor, a controller and an instrument display system; the brake lining is riveted on the brake shoe, through holes with different diameters are arranged along the direction of the brake shoe towards the brake lining, so that the through holes in the brake shoe and the brake lining form a mounting hole with a T-shaped cross section; the abrasion sensor comprises a wire harness and a plastic cap, the wire harness is folded into a U shape and fixed in the plastic cap, and the plastic cap is a T-shaped cylinder and can be placed in the T-shaped mounting hole in a matched mode; two ends of a wire harness in the wear sensor are connected with the controller, and the output end of the controller is connected with the instrument display system. The system is realized in such a way that when the brake lining normally works, the wire harness and the controller form a closed loop, when the brake lining is worn to the thickness required to be replaced, the wire harness is worn off, the closed loop is disconnected, and the controller sends a signal to the instrument according to the on-off state of the electrical loop to remind a driver of replacing the corresponding brake lining in time.
Description
Technical Field
The utility model relates to a hoist structural design technical field, concretely relates to drum brake wear alarm system and mobile crane.
Background
At present, drum brakes are widely applied in the fields of commercial vehicles, passenger vehicles and engineering machinery, when the drum brakes are used for braking, braking torque is provided through friction between a brake lining and a brake drum, the brake lining is continuously worn in the friction process, when the brake lining is worn to a limit position, the braking torque can be rapidly reduced, and generally, the brake lining needs to be replaced when an automobile crane runs for about 1 kilometre.
The drum brake lining wear condition of most vehicles in China is obtained through manual inspection, the brake dust cover is provided with an observation hole, when the vehicle is maintained or a driver finds that the braking force is insufficient in the use process of the vehicle, the wear condition of the brake lining can be observed through the observation hole, and if the brake lining is worn to the limit state, the brake lining needs to be replaced immediately. The time and labor consumption of the abrasion condition of the brake lining are detected, and great hidden danger is brought to the driving safety if the vehicle is not maintained in time or observed carefully.
In the drum brake wear alarm mechanism in the prior art, as shown in fig. 1, a wire harness 1 is folded into a U shape and arranged in a cylindrical thermosetting plastic cap 2, and the thermosetting plastic cap 2 is fixed in a metal base 3 with external threads through interference fit. The brake lining 5 is riveted on the brake shoe 4, a threaded hole is formed in the brake shoe, and the metal base 3 is installed on the brake shoe 4 through threaded connection. The thermosetting plastic cap protrudes a certain height of the brake shoe, when the brake lining is worn to the height, the alarm line in the thermosetting plastic cap is worn off to cause the on-off change of the electric loop, thereby realizing the brake wear alarm function of the drum brake.
The brake wear alarm mechanism mainly has the following defects:
1. the thermosetting plastic cap is in interference fit with the metal base, and the metal base is connected and fixed on the brake shoe through the bolt, so that the structure is complex, and the reliability is low;
2. the thermosetting plastic cap and the metal base are installed in an interference fit manner, if the fit is out of tolerance, the thermosetting plastic cap is difficult to install or falls off, and the abrasion alarm device cannot give an alarm accurately;
3. the metal base is installed at the bottom of the brake shoe through threads, when a vehicle runs and brakes, the vibration of the vehicle easily causes the threads to loosen, the height of the thermosetting plastic cap protruding out of the brake shoe is reduced, and even the metal base falls off, so that the abrasion alarm device can not give an alarm accurately or give no alarm.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome not enough among the prior art, provide a drum brake wear alarm system, guarantee to report to the police promptly when the fastest position of brake lining wearing and tearing reaches extreme condition, realize reporting to the police timely, accurate.
In order to solve the technical problem, the utility model provides a drum brake wear alarm system, which is characterized in that the drum brake wear alarm system comprises a wear sensor, a controller and an instrument display system;
the brake lining is riveted on the brake shoe, through holes with different diameters are arranged along the direction of the brake shoe towards the brake lining, so that the through holes in the brake shoe and the brake lining form a mounting hole with a T-shaped cross section;
the abrasion sensor comprises a wire harness and a plastic cap, the wire harness is folded into a U shape and fixed in the plastic cap, and the plastic cap is a T-shaped cylinder and can be placed in the T-shaped mounting hole in a matched mode;
two ends of a wire harness in the wear sensor are connected with the controller, and the output end of the controller is connected with the instrument display system.
Further, the mounting hole is arranged at the position of a leading shoe of the brake shoe.
Further, the mounting hole is located at a position where the positive pressure of the brake pad is maximum.
Further, the U-shaped closed end of the wiring harness abuts against the T-shaped top end of the plastic cap.
Further, a plastic cap is fixed to the bottom of the brake shoe through a cotter pin.
Furthermore, the wear sensors are mounted in the drum brakes, and two ends of a wire harness in each wear sensor are connected with the controller.
Correspondingly, the invention also provides the automobile crane, and the abrasion alarm system is installed in the drum brake of the automobile crane.
Compared with the prior art, the utility model discloses the beneficial effect who reaches is:
1. the plastic cap of the abrasion sensor is designed into a T-shaped cylinder, penetrates into a T-shaped mounting hole formed by the brake shoe and the brake lining together during mounting, and is fixed at the bottom of the brake shoe by a cotter pin; the connection mode is simple and reliable;
2. the abrasion sensor of each brake is independent to form a closed loop with the controller, so that independent detection and alarm of each brake are realized;
3. the abrasion sensor is arranged on a leading shoe of the brake shoe and is positioned at the position where the positive pressure of the brake lining is maximum, so that the alarm is given when the position where the brake lining is abraded most quickly reaches the limit state, and the timely and accurate alarm is realized.
Drawings
FIG. 1 is a schematic view of a drum brake wear warning mechanism of the prior art;
FIG. 2 is a schematic view of the wear sensor and brake assembly of the present invention;
fig. 3 is a structural diagram of the drum brake wear alarm system of the present invention.
Reference numerals: 1. a wire harness; 2. a plastic cap; 3. a metal base; 4. a brake shoe; 5. a brake lining; 6. mounting holes; 7. and a cotter pin.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including other elements not expressly listed, in addition to those listed.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present patent application can be understood in specific cases by those skilled in the art.
The drum brake wear alarm system of the utility model, as shown in fig. 2 and fig. 3, comprises a wear sensor, a controller and an instrument display system;
the brake lining 5 is riveted on the brake shoe 4, through holes with different diameters are arranged along the direction of the brake shoe 4 towards the brake lining 5, so that the through holes in the brake shoe 4 and the brake lining 5 jointly form a mounting hole 6 with a T-shaped cross section;
the abrasion sensor comprises a wiring harness 1 and a plastic cap 2, wherein the wiring harness 1 is folded into a U shape and fixed in the plastic cap 2, and the plastic cap 2 is a T-shaped cylinder and can be placed in a T-shaped mounting hole 6 in a matching mode;
two ends of a wire harness 1 in the abrasion sensor are connected with a controller, and the output end of the controller is connected with an instrument display system.
Examples
In the prior art, a brake shoe of a drum brake consists of a leading shoe and a trailing shoe, wherein the leading shoe has a boosting effect, is stressed greatly, and a brake lining is abraded quickly. In order to ensure the timeliness of the abrasion alarm, the abrasion sensor is arranged on the guide shoe and is positioned at the position with the maximum positive pressure of the brake lining.
In this embodiment, referring to fig. 2, a brake lining 5 is riveted to a brake shoe 4, and through holes of different diameters are provided along the brake shoe 4 toward the brake lining 5 at a position where a positive pressure of the brake lining 5 is maximum at a leading shoe position of the brake shoe 4, so that the through holes inside the brake shoe 4 and inside the brake lining 5 together form a mounting hole 6 having a T-shaped cross section. The upper end of the through-hole in the brake lining 5 does not penetrate the brake lining 5.
The wear sensor comprises a wiring harness 1 and a plastic cap 2, wherein the wiring harness 1 is folded into a U shape and fixed in the plastic cap 2, the plastic cap 2 is a T-shaped cylinder, and the size of the plastic cap can be just matched with the size of the plastic cap and placed in a T-shaped mounting hole 6. The T-shaped arrangement enables the plastic cap to be firmly fixed in the T-shaped mounting hole.
The plastic cap 2 of the wear sensor is passed from the bottom of the brake shoe 4 into the T-shaped mounting hole 6 and the plastic cap 2 is fixed to the bottom of the brake shoe 4 with a cotter pin 7. The U-shaped closed end of the wire harness 1 abuts against the T-shaped top end of the plastic cap 2. The top end of the plastic cap 2 is higher than the brake shoe Xmm (the value is set according to the actual situation), so that when the wire harness in the abrasion sensor is abraded, the brake lining can still enable the vehicle to run for 200-500 km.
The abrasion sensors are installed in the drum brakes, two ends of a wire harness in each abrasion sensor are connected with the controller, and the output end of the controller is connected with the instrument display system.
The utility model discloses drum brake wear alarm system working process as follows: when the brake linings 5 work normally, the wire harnesses 1 in the drum brakes and the controller form a closed loop, when one brake lining 5 is worn to the thickness needing to be replaced, the wire harness 1 in the wear sensor is worn off (the U-shaped closed end of the wire harness positioned at the top end of the plastic cap is worn off), the wire harness is disconnected with the closed loop of the controller, and the controller sends out an alarm signal to a vehicle instrument display system according to the disconnection state of the electric loop and reminds a driver that the brake is worn to the limit state, so that the driver needs to replace the brake lining as soon as possible.
The utility model discloses drum brake wear alarm system has the characteristics do:
1. the plastic cap of the abrasion sensor is designed into a T-shaped cylinder, penetrates into a T-shaped mounting hole formed by the brake shoe and the brake lining together during mounting, and is fixed at the bottom of the brake shoe by a cotter pin; the connection mode is simple and reliable;
2. the abrasion sensor of each brake is independent to form a closed loop with the controller, so that independent detection and alarm of each brake are realized;
3. the abrasion sensor is arranged on a leading shoe of the brake shoe and is positioned at the position where the positive pressure of the brake lining is maximum, so that the alarm is given when the position where the brake lining is abraded most quickly reaches the limit state, and the timely and accurate alarm is realized.
Correspondingly, the invention also provides the automobile crane, and the abrasion alarm system is installed in the drum brake of the automobile crane.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A drum brake wear alarm system is characterized by comprising a wear sensor, a controller and an instrument display system;
the brake lining is riveted on the brake shoe, through holes with different diameters are arranged along the direction of the brake shoe towards the brake lining, so that the through holes in the brake shoe and the brake lining form a mounting hole with a T-shaped cross section;
the abrasion sensor comprises a wire harness and a plastic cap, the wire harness is folded into a U shape and fixed in the plastic cap, and the plastic cap is a T-shaped cylinder and can be placed in the T-shaped mounting hole in a matched mode;
two ends of a wire harness in the wear sensor are connected with the controller, and the output end of the controller is connected with the instrument display system.
2. A drum brake wear alarm system according to claim 1 in which the mounting hole is provided at the leading shoe position of the brake shoe.
3. A drum brake wear warning system according to claim 2, wherein the mounting hole is located at a position where positive pressure on the brake lining is greatest.
4. A drum brake wear alarm system according to claim 1 in which the U-shaped closed end of the wiring harness abuts the T-shaped top end of the plastic cap.
5. A drum brake wear alarm system according to claim 1 in which the plastic cap is secured to the base of the brake shoe by a cotter pin.
6. A drum brake wear alarm system according to claim 1 in which said wear sensor is mounted in each drum brake, the wear sensor having a harness connected at each end to the controller.
7. A truck crane having a drum brake wear warning system as claimed in any one of claims 1 to 6 mounted in a drum brake of the truck crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920562322.3U CN210106461U (en) | 2019-04-24 | 2019-04-24 | Drum brake wear alarm system and mobile crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920562322.3U CN210106461U (en) | 2019-04-24 | 2019-04-24 | Drum brake wear alarm system and mobile crane |
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| Publication Number | Publication Date |
|---|---|
| CN210106461U true CN210106461U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920562322.3U Active CN210106461U (en) | 2019-04-24 | 2019-04-24 | Drum brake wear alarm system and mobile crane |
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| CN (1) | CN210106461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795094A (en) * | 2020-08-12 | 2020-10-20 | 嘉兴学院 | Automobile brake pad wear sensor |
| CN113898687A (en) * | 2021-10-18 | 2022-01-07 | 中国重汽集团济南动力有限公司 | Brake disc temperature wear real-time monitoring and alarming device and method |
-
2019
- 2019-04-24 CN CN201920562322.3U patent/CN210106461U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795094A (en) * | 2020-08-12 | 2020-10-20 | 嘉兴学院 | Automobile brake pad wear sensor |
| CN113898687A (en) * | 2021-10-18 | 2022-01-07 | 中国重汽集团济南动力有限公司 | Brake disc temperature wear real-time monitoring and alarming device and method |
| CN113898687B (en) * | 2021-10-18 | 2023-10-03 | 中国重汽集团济南动力有限公司 | Real-time monitoring and alarming device and method for temperature abrasion of brake disc |
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