Safety drum brake pad

Abstract

The utility model discloses a safety drum brake pad which comprises an arc-shaped back plate, a strip-shaped rib plate, an arc-shaped friction plate and a sensing module. The sensing module comprises a module socket, a sealing plate, a temperature sensor and three wear sensing units; the abrasion sensing unit comprises a V-shaped conducting strip, two stable sliding blocks and two tension springs. According to the safe drum brake pad, the two tension springs are used for pulling the two stable sliding blocks, so that after the V-shaped conducting strips are broken due to abrasion, the V-shaped conducting strips are rapidly pulled into the cylindrical cavities in the corresponding sides, obvious abrasion damage to an automobile brake disc is avoided, and meanwhile misjudgment caused by re-conductive connection due to contact with the automobile brake disc is avoided; the temperature of the arc-shaped friction plate can be measured by utilizing the heat-conducting silica gel and the temperature sensor; the stable sliding block is connected between the V-shaped conducting strip and the tension spring, so that the shaking of the end part of the tension spring in the cylindrical cavity is reduced, and compared with the direct connection between the V-shaped conducting strip and the tension spring, the connection is more stable and firmer.

Description

Technical Field

[0001] The utility model relates to a brake pad, in particular to a safety drum brake pad. Background Art

[0002] Brake pads are the most critical safety component in a vehicle's braking system, and their effectiveness is crucial for the vehicle's braking performance. Brake pads typically consist of a steel backing plate and a friction pad made of friction material, bonded to the backing plate by an adhesive layer and typically also provided with a thermal insulation layer. Due to the hard contact between the brake pad and the brake drum during use, long-term use can lead to significant wear of the pad, reducing braking effectiveness. Furthermore, prolonged, uninterrupted braking can generate high temperatures in the pad, which can easily cause brake failure. Drum brake pads, in particular, are installed within the drum, making wear difficult to detect without removal. Furthermore, the presence of the pad within the drum hinders heat dissipation. Promptly monitoring wear and temperature conditions can help mitigate potential risks.

[0003] The existing wear condition collection module collects wear conditions in the form of a U-shaped conductive sheet. The U-shaped conductive sheet is fixed inside the friction plate. When the bent part of the U-shaped conductive sheet is worn and broken, it indicates that it has been worn to this position. However, when using this method, even if the U-shaped conductive sheet has been worn and broken, it will still come into contact with the brake drum and wear during braking. Moreover, after contacting the brake drum during braking, it can still form a conductive circuit, which will cause misjudgment. Utility Model Content

[0004] The purpose of the utility model is to provide a safe drum brake pad, which can timely know the wear and temperature conditions, can cause less wear damage to the brake drum, and can also avoid misjudgment of conductive contact during braking.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a safety drum brake pad, including an arc-shaped back plate, a strip rib plate, an arc-shaped friction plate and a sensor module; the sensor module includes a module socket, a closing plate, a temperature sensor and three wear sensing units; the wear sensing unit includes a V-shaped conductive plate, two stabilizing sliders and two tension springs; the arc-shaped friction plate is fixed on the lower outer arc surface of the arc-shaped back plate, and the strip rib plate is fixed on the upper inner arc surface of the arc-shaped back plate; an installation window is provided on the arc-shaped back plate, and an installation slot is provided on the arc-shaped friction plate and located at the installation window; the module socket is inserted into the installation slot at the installation window, and the closing plate is detachably covered on the installation window; a temperature sensing slot is provided on the side of the module socket, and the temperature sensor is provided In the temperature sensing groove, the temperature sensing groove is filled with thermal conductive silicone; three mounting hole groups are arranged on the module socket, each mounting hole group includes two cylindrical cavities and a V-shaped flat hole, the two ends of the V-shaped flat hole are connected to the bottom of the two cylindrical cavities, and the lower end heights of the cylindrical cavities of the three mounting hole groups decrease successively; the two tension springs and two stabilizing sliders of the wear sensing unit are movably arranged in the two cylindrical cavities of the corresponding mounting hole groups, the V-shaped conductive sheet is installed in the corresponding V-shaped flat hole, the stabilizing slider is electrically connected and fixed to the lower end of the corresponding tension spring, and the two ends of the V-shaped conductive sheet are electrically connected and fixed to the corresponding stabilizing slider; various electrode columns are arranged on the top of the module socket; the temperature sensor and each tension spring are conductively connected to the corresponding electrode column.

[0006] Furthermore, various reinforcement strips are distributed on the lower outer arc surface of the arc-shaped back plate, the reinforcement strips are embedded in the arc-shaped friction plate, and the cross-section of the reinforcement strips is S-shaped.

[0007] Furthermore, a U-shaped snap plate is fixedly provided on the upper inner arc surface of the arc-shaped back plate, and rectangular holes are provided on the two parallel plates of the U-shaped snap plate; the strip ribs pass through the rectangular holes of each U-shaped snap seat and are connected and fixed; a limiting convex strip is provided on the lower side surface of the bent connecting plate of the U-shaped snap plate, and a limiting groove is provided on the upper edge of the strip rib, and the limiting convex strip is located in the limiting groove at the corresponding position and is connected and fixed.

[0008] Furthermore, a hinged mounting hole is provided on both ends of the strip rib; and a tension spring hole is provided on both ends of the strip rib and close to the hinged mounting hole.

[0009] Furthermore, heat dissipation grooves are distributed on the friction surface of the arc-shaped friction plate.

[0010] The beneficial effects of the present invention are as follows: two tension springs are used to pull two stabilizing sliders, so that after the V-shaped conductive sheet is worn and broken, it is quickly pulled into the cylindrical cavity on the corresponding side, which will not cause too obvious wear damage to the automobile brake disc, and will not contact the automobile brake disc to re-connect electrically and cause misjudgment; the setting of thermal conductive silicone and temperature sensor can realize the temperature measurement of the arc friction sheet; the stabilizing slider is connected between the V-shaped conductive sheet and the tension spring, so as to reduce the shaking of the tension spring end in the cylindrical cavity, which is more stable and firm than the direct connection between the V-shaped conductive sheet and the tension spring; the setting of the lower end height of the cylindrical cavity of the three mounting hole groups decreasing in sequence can realize the reminder of three wear degrees of the arc friction sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a front structural diagram of the brake pad of the present invention;

[0012] Figure 2 This is a schematic cross-sectional view of the U-shaped snap plate of the present invention;

[0013] Figure 3 This is a schematic cross-sectional view of the installation location of the sensor module of the present invention;

[0014] Figure 4 This is a schematic cross-sectional structural diagram of the sensor module of the present invention;

[0015] Figure 5 This is a schematic diagram of the voltage acquisition circuit structure of the utility model. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0017] Example 1:

[0018] like Figure 1-4As shown, the safety drum brake pad disclosed in the utility model includes: a curved back plate 1, a strip rib 3, a curved friction plate 2 and a sensor module; the sensor module includes a module socket 11, a closing plate 4, a temperature sensor 13 and three wear sensing units; the wear sensing unit includes a V-shaped conductive plate 12, two stabilizing sliders 19 and two tension springs 14; the curved friction plate 2 is fixed on the lower outer curved surface of the curved back plate 1, and the strip rib 3 is fixed on the upper inner curved surface of the curved back plate 1; an installation window 23 is provided on the curved back plate 1, and an installation groove 22 is provided on the curved friction plate 2 and located at the installation window 23; the module socket 11 is inserted into the installation groove 22 from the installation window 23, and the closing plate 4 is detachably covered on the installation window 23; a temperature sensing groove 16 is provided on the side of the module socket 11, and the temperature sensor 13 is provided in the temperature sensing groove 16 and the temperature sensing groove 16 is filled with thermal conductive silicone 17; three mounting hole groups are provided on the module socket 11, each mounting hole group includes two cylindrical cavities 18 and a V-shaped flat hole 21, and the two ends of the V-shaped flat hole 21 are connected to the bottom of the two cylindrical cavities 18, and the lower end heights of the cylindrical cavities 18 of the three mounting hole groups decrease successively; the two tension springs 14 and the two stabilizing sliders 19 of the wear sensing unit are movably arranged in the two cylindrical cavities 18 of the corresponding mounting hole groups, the V-shaped conductive sheet 12 is installed in the corresponding V-shaped flat hole 21, the stabilizing slider 19 is electrically connected and fixed to the lower end of the corresponding tension spring 14, and the two ends of the V-shaped conductive sheet 12 are electrically connected and fixed to the corresponding stabilizing slider 19; each electrode column 20 is provided on the top of the module socket 11; the temperature sensor 13 and each tension spring 14 are conductively connected to the corresponding electrode column 20.

[0019] Two tension springs 14 are used to pull the two stabilizing sliders 19, so that after the V-shaped conductive sheet 12 is worn and broken, it is quickly pulled into the cylindrical cavity 18 on the corresponding side, which will not cause too obvious wear damage to the automobile brake drum, and will not contact the brake drum to reconnect conductively and cause misjudgment; the setting of thermal conductive silicone 17 and temperature sensor 13 can realize the temperature measurement of the arc friction sheet 2; the stabilizing slider 19 is connected between the V-shaped conductive sheet 12 and the tension spring 14, so as to reduce the shaking of the end of the tension spring 14 in the cylindrical cavity 18, which is more stable and firm than the direct connection between the V-shaped conductive sheet 12 and the tension spring 14; the setting of the lower end height of the cylindrical cavity 18 of the three mounting hole groups is reduced in sequence, so as to realize the three wear levels of the arc friction sheet 2 and ensure the safety of the brake pad use.

[0020] Furthermore, a countersunk hole 24 is provided on the closing plate 4 and a threaded hole 15 is provided on the arc-shaped back plate 1 . The closing plate 4 is detachably installed by the cooperation of the mounting bolts, the countersunk hole 24 and the threaded hole 15 .

[0021] Furthermore, reinforcement strips 25 are distributed along the lower outer curved surface of the curved back plate 1. These strips 25 are embedded within the curved friction plate 2 and have an S-shaped cross-section. The S-shaped reinforcement strips 25 ensure that the curved friction plate 2 is fully embedded within the curved friction plate 2 when pressed onto the curved back plate 1. Furthermore, the compaction density of the curved friction plate 2 on the curved surfaces on both sides of the reinforcement strips 25 is relatively uniform. Compared to prior art methods, which suffer from low compaction density at the obstructed surface due to compression bending of the bent flange, the S-shaped reinforcement strips 25 provide a more secure connection.

[0022] Furthermore, a U-shaped snap plate is fixedly mounted on the upper inner curved surface of the curved back panel 1, and rectangular holes 26 are provided on each of the two parallel plates 9 of the U-shaped snap plate. The strip ribs 3 extend through the rectangular holes 26 of each U-shaped snap seat and are connected and fixed. A limiting ridge 27 is provided on the lower side of the bent connecting plate 6 of the U-shaped snap plate, and limiting notches 28 are provided on the upper edge of the strip ribs 3. The limiting ridges 27 are located within the limiting notches 28 at corresponding positions and are connected and fixed. The use of the U-shaped snap plate can enhance the connection strength between the strip ribs 3 and the curved back panel 1, and the mutual locking and fixing of the limiting notches 28 and the limiting ridges 27 can further enhance the installation structural strength of the strip ribs 3.

[0023] Furthermore, a hinged mounting hole 8 is provided at each end of the strip rib 3, and a tension spring hole 10 is provided at each end of the strip rib 3 near the hinged mounting hole 8. The hinged mounting hole 8 and the tension spring hole 10 enable the strip rib 3 to be installed in the brake drum.

[0024] Furthermore, heat dissipation grooves 7 are distributed on the friction surface of the arc-shaped friction plate 2, thereby facilitating heat dissipation of the arc-shaped friction plate 2 during braking.

[0025] like Figure 1 and 5As shown, when the safety drum brake pad disclosed in the present invention is in use, each electrode column 20 is electrically connected to the outside through the electrical connection cable 5, wherein the temperature sensor 13 adopts a digital sensor, which is electrically connected to the electronic control host of the car through the electrical connection cable 5, and the electrode column 20 of the wear sensing unit is electrically connected to the voltage acquisition circuit through the electrical connection cable 5, and then the electronic control host of the car collects the voltage signal through the voltage acquisition circuit. The voltage acquisition circuit includes a resistor R1 and a resistor R2, one end of the resistor R1 is connected to the VCC power supply, and the other end is electrically connected to one end of the resistor R2, the other end of the resistor R2 is grounded, and the resistor R1 is connected to the VCC power supply. The connection point between R1 and resistor R2 is set as the collection point C0. The vehicle's electronic control host is connected to the collection point C0. D represents a conductive loop composed of two electrode columns 20, a V-shaped conductive sheet 12, two stabilizing sliders 19, and two tension springs 14. One end of the conductive loop is grounded, and the other end is connected to the collection point C0. If the V-shaped conductive sheet 12 is not worn off, then the C0 end obtains a voltage value. If the V-shaped conductive sheet 12 is worn off, then the C0 end obtains another voltage value. Based on this, it is possible to determine whether the V-shaped conductive sheet 12 is worn off, and thus determine the wear condition of the arc-shaped friction plate 2.

[0026] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A safety drum brake pad, characterized by: The invention comprises an arc-shaped back plate (1), a strip rib plate (3), an arc-shaped friction plate (2) and a sensor module; the sensor module comprises a module socket (11), a closing plate (4), a temperature sensor (13) and three wear sensing units; the wear sensing units comprise a V-shaped conductive plate (12), two stabilizing sliders (19) and two tension springs (14); the arc-shaped friction plate (2) is fixed on the lower outer arc surface of the arc-shaped back plate (1), and the strip rib plate (3) is fixed on the upper inner arc surface of the arc-shaped back plate (1). A mounting window (23) is provided on the arc-shaped back plate (1), and a mounting groove (22) is provided on the arc-shaped friction plate (2) and located at the mounting window (23); the module socket (11) is inserted into the mounting groove (22) from the mounting window (23), and the closing plate (4) is detachably covered on the mounting window (23); a temperature sensing groove (16) is provided on the side of the module socket (11), and the temperature sensor (13) is provided in the temperature sensing groove (16) and is The wear sensing groove (16) is filled with thermal conductive silica gel (17); three mounting hole groups are provided on the module socket (11), each mounting hole group includes two cylindrical cavities (18) and a V-shaped flat hole (21), the two ends of the V-shaped flat hole (21) are connected to the bottom of the two cylindrical cavities (18), and the lower end heights of the cylindrical cavities (18) of the three mounting hole groups decrease in sequence; the two tension springs (14) and the two stabilizing sliders (19) of the wear sensing unit are movably arranged on In the two cylindrical cavities (18) of the corresponding mounting hole group, the V-shaped conductive sheet (12) is installed in the corresponding V-shaped flat hole (21), the stabilizing slider (19) is electrically connected and fixed to the lower end of the corresponding tension spring (14), and the two ends of the V-shaped conductive sheet (12) are electrically connected and fixed to the corresponding stabilizing slider (19); each electrode column (20) is provided on the top of the module socket (11); the temperature sensor (13) and each tension spring (14) are electrically connected to the corresponding electrode column (20).

2. The safety drum brake pad according to claim 1, characterized in that: Reinforcement strips (25) are distributed on the lower outer arc surface of the arc-shaped back plate (1), the reinforcement strips (25) are embedded in the arc-shaped friction plate (2), and the cross section of the reinforcement strips (25) is S-shaped.

3. The safety drum brake pad according to claim 1, characterized in that: A U-shaped snap plate is fixedly arranged on the upper inner arc surface of the arc-shaped back plate (1), and rectangular holes (26) are arranged on the two parallel plates (9) of the U-shaped snap plate; the strip ribs (3) pass through the rectangular holes (26) of each U-shaped snap seat and are connected and fixed; a limiting convex strip (27) is arranged on the lower side surface of the bent connecting plate (6) of the U-shaped snap plate, and a limiting notch (28) is arranged on the upper edge of the strip rib (3); the limiting convex strip (27) is located in the limiting notch (28) at the corresponding position and is connected and fixed.

4. The safety drum brake pad according to claim 1, characterized in that: A hinged mounting hole (8) is provided on both ends of the strip rib (3); and a tension spring hole (10) is provided on both ends of the strip rib (3) and close to the hinged mounting hole (8).

5. The safety drum brake pad according to claim 1, characterized in that: Heat dissipation grooves (7) are distributed on the friction surface of the arc-shaped friction plate (2).

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