CN110578763A - wear indicator for drum brake shoes - Google Patents
wear indicator for drum brake shoes Download PDFInfo
- Publication number
- CN110578763A CN110578763A CN201810584498.9A CN201810584498A CN110578763A CN 110578763 A CN110578763 A CN 110578763A CN 201810584498 A CN201810584498 A CN 201810584498A CN 110578763 A CN110578763 A CN 110578763A
- Authority
- CN
- China
- Prior art keywords
- brake shoe
- plug
- brake
- wear indicator
- insert
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
- F16D66/023—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness directly sensing the position of braking members
- F16D66/024—Sensors mounted on braking members adapted to contact the brake disc or drum, e.g. wire loops severed on contact
Abstract
the invention aims to provide a brake shoe abrasion indicating device which is simple in structure, convenient to process, convenient to install and easy to replace.
Description
Technical Field
The invention relates to the field of automobile braking, in particular to a wear indicating device for a brake shoe of a drum brake.
Background
Drum brakes, which are the mainstream brake equipment of modern vehicles, are widely applied to various types of vehicles, and the brakes are pressed on brake wheels through brake shoes, so that the brake shoes are abraded due to friction during braking. After the brake shoe is worn to a limit position, if the brake shoe is not replaced in time, the problems of great reduction of brake torque and unbalance of brake torque of left and right wheels are caused, serious brake problems such as long brake distance, brake deviation and the like are caused, and great hidden danger is brought to driving safety. Because the brake shoe of the drum brake is sealed in the rim and the brake drum of the vehicle, the thickness of the brake shoe can only be judged by visual inspection through the observation hole by a driver, and the abrasion problem of the brake shoe cannot be accurately measured and timely found by means of a tool.
Disclosure of Invention
The invention aims to provide a brake shoe abrasion indicating device which is simple in structure, convenient to process, convenient to install and easy to replace.
In order to achieve the purpose, the invention adopts the following technical scheme: a wear indication device for a drum brake shoe, comprising:
A connector part 12, wherein the connector part 12 is connected with a vehicle instrument panel circuit,
And the plug-in part 13 is matched and connected with the connecting part 12, a lead 11 is arranged in the plug-in part 13, and when the plug-in part 13 is inserted into the connecting part 12, the lead 11 forms a passage with a vehicle instrument panel circuit through the connecting part 12.
Furthermore, the plug-in part 13 and the connecting part 12 are connected through a quick-plugging mechanism.
Further, the insert portion 13 has a cylindrical or conical shape.
Further, the connecting member portion 12 has a groove shape.
Further, the connecting part portion has a protruding shape.
Further, the wire 11 has a U-shape.
further, the insert part 12 and the connecting part 12 may be connected by a screw structure.
Further, a brake having a wear indicator according to any one of the preceding claims, the wear indicator brake comprising a brake shoe and a brake shoe, said link member 12 being secured to said brake shoe 22, said insert member 13 being connected to said link member 12 through said brake shoe 22.
Further, the brake is characterized in that: after the plug-in part 13 passes through the brake shoe 22 and is connected with the connecting part 12, the top end of the plug-in part 13 is located at the bottom of the brake shoe 21 and protrudes out of the upper surface of the brake shoe 22.
Further, the top end of the plug-in part 13 is provided with a lead 11.
In the invention, when the brake shoe 21 is worn to the limit position, the lead 11 in the plug-in part of the wear indicating device is worn off at the moment, so that a circuit breaking signal is formed and is reflected to a driver through a vehicle instrument circuit to remind the driver to replace the brake shoe. Meanwhile, the part checking part 12 in the wear indicating device is easy to replace after being worn.
In addition to the wear indication device described above, the present invention also provides a drum brake having such a wear indication device.
Drawings
The present invention is described in further detail by the following preferred embodiments with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic view of a brake shoe having a wear indicator according to one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a brake shoe wear indicating device;
Fig. 3 is another embodiment of the present invention.
Detailed Description
Shown in figure 1: brake shoe 22, brake shoe 21, plug-in part 13, connecting part 12, wire 11.
Shown in fig. 2 are a connector part 12, an insert part 13, and a conductor 11.
According to the invention, the wear indicating device is mounted on the drum brake shoe. In fig. 1, the fastening member 12 is fixed to the brake shoe 22 in an unlimited manner, and may be fixed by a snap structure, a screw connection, or the like. Meanwhile, a lead is arranged in the connecting part 12 and is connected with a circuit of a vehicle instrument panel, and a corresponding indicator light or other reminding devices are arranged on the instrument panel. The brake shoe 22 and the brake shoe 21 are provided with holes or openings of other shapes so that the insert part 13 can pass through the brake shoe 21 and then pass through the brake shoe 22. The insert 13 may be cylindrical and may be a clearance fit in the bore of the brake shoe 22. The insert part 13 may also be provided with a conical shape. The insert part 13 is connected and fixed to the connecting part 12 after passing through the brake shoe 22. The diameter of the top or top portion of insert 13 may also be slightly larger than the diameter of insert 13 elsewhere, and larger than the diameter of the bore of brake shoe 22, and smaller than the diameter of brake shoe 21. This facilitates replacement of the insert part 13 by the brake shoe 21, and also facilitates the installation of the lead wire 13 at the tip end of the insert part 13, thereby facilitating the protection against disconnection. Meanwhile, the top end of the plug-in part 13 is larger than the diameter of the hole of the brake shoe 22, and after the plug-in part 13 penetrates through the brake shoe 22 and is fixedly connected with the connecting part 12, the slightly larger top end can cover the hole of the brake shoe 22, so that the waterproof and dustproof sealing function is achieved.
The plug-in part 13 and the connector part 12 can be connected by the structure shown in fig. 2. Since the plug-in part 13 needs to be replaced frequently, in order to facilitate installation or replacement of the plug-in part 13, the fixed connection mode here adopts a quick plug-in connection. For example, in fig. 2, the insertion part 13 is a column, and the lower end is provided with a groove, while the coupling part 12 coupled with the insertion part is provided with a protrusion. The plug-in part or the connecting part can be made of a certain elastic material, and the groove on the plug-in part 13 and the protruding part of the connecting part 12 are buckled together to realize fixed connection.
when the insert part 13 is inserted down into the connector part 12 and is securely attached, the tip of the insert part 13 is outside the bore in the brake shoe 22 and has a thickness that is almost coincident with or slightly above the limit position of the brake shoe. The lead wire 11 in the plug-in part 13 is connected with the vehicle instrument panel circuit through the connector part 12 to form a circuit path.
When the plug-in part 13 is connected with the connecting part 12, the lead wire 11 is connected with the circuit of the instrument panel of the vehicle, when the brake shoe 21 and the brake shoe are worn to the limit position by the brake drum, for example, when the brake shoe or the brake shoe is originally 1/3 thick, the brake drum can rub the top end of the plug-in part 13, namely, the plug-in part with a certain thickness outside the hole on the brake shoe 22, and the lead wire 11 passes through the plug-in part. When the brake drum wears the brake shoes 21 to the extreme position, the brake drum will wear off the wires 11 in the insert portion. At the moment, the circuit is broken, and the driver is reminded to replace the brake shoe in time and replace a new plug-in part 13 through the broken circuit alarm. The top of the insert 13 may be made of a material similar to the wear resistance of the brake shoes 21, which ensures that the wires 11 will wear away.
The wire 11 may be provided in a U-shape with a length of wire at the top end portion of the insert 12 so that the wire may be worn away at the same time as the brake shoes 21 wear to the extreme position.
The lower extreme of plug-in components portion 13 can also set up the seal groove, cooperates corresponding sealing washer or other seal assembly spare, and the back is connected with connecting piece portion 12, with the internal surface cooperation of connecting piece portion 12, has possessed dustproof and waterproof's function.
Fig. 3 shows another construction of an insert part 13, which is provided with a thread at its lower end and a corresponding thread on the connecting part. The insert part 13 is fixedly connected with the connector part by means of a screw thread. Through threaded connection, also have certain sealed, dustproof, waterproof function.
Claims (10)
1. A wear indication device for a drum brake shoe, comprising:
A connector part 12, the connector part 12 being connected to a vehicle instrument panel circuit,
the plug-in part 13, the plug-in part 13 with the union part 12 cooperation is connected, plug-in part 13 in be provided with wire 11, when plug-in part 13 with union part 12 cooperation connect the back, wire 11 pass through union part 12 and vehicle instrument board circuit formation route.
2. a wear indicator device in accordance with claim 1, wherein the insert portion 13 and the connector portion 12 are cooperatively connected by a snap-fit arrangement.
3. The wear indicator of claim 1, wherein the insert portion 13 has a cylindrical or conical shape.
4. A wear indicator device in accordance with claim 3, wherein the insert part 13 is provided with a recess.
5. the wear indicator of claim 4, wherein the connector portion 12 has a partially convex shape.
6. The wear indicator of claim 1, wherein the wire 11 has a U-shape.
7. A wear indicator device in accordance with claim 1, wherein the insert portion 13 and the attachment portion 12 are connected by a threaded arrangement.
8. A brake having a wear indicator according to any one of the preceding claims, wherein: the brake shoe comprises a brake shoe 22 and a brake shoe plate 21, wherein the connecting piece part 12 is fixed on the brake shoe 22, and the plug-in piece part 13 penetrates through the brake shoe and is connected with the connecting piece part 12.
9. The brake of claim 8, wherein: after the plug-in part 13 passes through the brake shoe and is connected with the connecting part 12, the top end of the plug-in part 13 is located at the bottom of the brake shoe 21 and protrudes out of the upper surface of the brake shoe 22.
10. The brake of claim 9, wherein: the top end of the plug-in part 13 is provided with a lead 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810584498.9A CN110578763A (en) | 2018-06-08 | 2018-06-08 | wear indicator for drum brake shoes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810584498.9A CN110578763A (en) | 2018-06-08 | 2018-06-08 | wear indicator for drum brake shoes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110578763A true CN110578763A (en) | 2019-12-17 |
Family
ID=68809071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810584498.9A Pending CN110578763A (en) | 2018-06-08 | 2018-06-08 | wear indicator for drum brake shoes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110578763A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439872A (en) * | 2022-04-08 | 2022-05-06 | 杭州杰牌传动科技有限公司 | Braking device of hoisting mechanism of tower crane |
-
2018
- 2018-06-08 CN CN201810584498.9A patent/CN110578763A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439872A (en) * | 2022-04-08 | 2022-05-06 | 杭州杰牌传动科技有限公司 | Braking device of hoisting mechanism of tower crane |
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