Brake shoe detection device with overheating gap automatic protection function

Abstract

The invention relates to the field of brake shoe temperature detection, and provides a brake shoe detection device with an overheating gap automatic protection function, which comprises a brake bottom plate, a brake shoe and a brake driving mechanism, the brake shoe is fixedly connected with a first brake pad and a second brake pad, a first heat conduction piece is embedded in the first brake pad, and a second heat conduction piece is embedded in the second brake pad; a wedge-shaped plate is slidably connected to the brake shoe and connected with the brake shoe through a first elastic piece, an insertion card and a mounting plate are fixedly connected to the wedge-shaped plate, the temperature sensor is slidably connected to the mounting plate, and a locking piece is fixedly connected to the brake shoe. A pressing type elastic self-locking mechanism matched with the plug-in card is arranged in the groove body, and a pressing wheel mechanism is fixedly connected to the brake bottom plate. According to the invention, double-point temperature dynamic detection can be automatically realized, and information is more comprehensive.

Description

Technical Field

[0001] The invention relates to the technical field of brake shoe temperature detection, and in particular to a brake shoe detection device with an overheat gap automatic protection function. Background Art

[0002] In the automobile braking system, the brake pad is a component that is in direct contact with the brake drum or brake disc. It bears a lot of friction heat during the braking process, so its temperature state directly affects the stability and reliability of the vehicle's braking performance. Brake pads that are in a high temperature state for a long time will not only accelerate their wear and shorten their service life, but may also cause thermal decay, reduce braking effect, and even cause safety hazards.

[0003] However, common problems in the existing technology are: mainstream temperature monitoring technologies mostly focus on measuring the temperature of a fixed position on the brake pad through a temperature sensor. Although it can reflect the thermal state of the brake pad to a certain extent, due to the influence of factors such as force, contact surface wear and braking frequency, there is an obvious temperature gradient distribution in different areas of the brake pad. Especially under complex working conditions such as high-speed driving, continuous braking or long downhill, the temperature rise rate and peak temperature of the edge and middle area of the brake pad may differ greatly. Summary of the invention

[0004] In view of the above technical problems, the present invention aims to provide a brake shoe detection device with an automatic overheat gap protection function. To solve the above technical problems, the present invention adopts the following technical solutions: A brake shoe detection device with an automatic overheating gap protection function comprises a brake base plate, a brake shoe and a brake drive mechanism, the brake shoe is rotatably connected to the brake base plate, the brake drive mechanism is connected to the brake base plate, a first brake pad and a second brake pad are fixedly connected to the brake shoe, a first heat conductive member is embedded in the first brake pad, the first heat conductive member extends to the outside of the first brake pad, a second heat conductive member is embedded in the second brake pad, the second heat conductive member extends to the outside of the second brake pad, a wedge plate is slidably connected to the brake shoe, the wedge plate is connected to the brake shoe through a first elastic member, a plug-in card and a mounting plate are fixedly connected to the wedge plate, a temperature sensor is slidably connected to the mounting plate, the mounting plate is connected to the temperature sensor through a third elastic member, a locking member is fixedly connected to the brake shoe, a groove body is provided on the locking member, a press-type elastic self-locking mechanism adapted to the plug-in card is provided in the groove body, and a pressure wheel mechanism is fixedly connected to the brake base plate.

[0005] Preferably, the detection device further comprises a cooling mechanism, and the cooling mechanism cools the first heat conducting member and the second heat conducting member when in operation.

[0006] Preferably, the cooling mechanism includes a support plate, a protrusion, a liquid pump, a cold conduction box, a gear ring, and a liquid storage tank. The support plate is fixedly connected to the brake shoe. The liquid pump and the cold conduction box are both slidably connected to the support plate. The protrusion is fixedly connected to the support plate. The liquid pump is connected to the protrusion through a second elastic member. An electromagnet is fixedly connected to the protrusion. A permanent magnet is embedded in the outer wall of the liquid pump. A connecting rod is rotatably connected to the liquid pump. A gear is fixedly connected to the connecting rod. The gear is located outside the liquid pump. The gear is fixedly connected to a water wheel inside the liquid pump. The liquid pump is fixedly connected to the cold conduction box through a rigid liquid transfer pipe. The liquid pump is connected to the liquid storage tank through a hose. The cold conduction box is connected to the liquid storage tank through a hose. The liquid storage tank is filled with a coolant. The gear ring is fixedly connected to the wheel hub.

[0007] Preferably, the wedge-shaped plate is slidably connected to a guide rail on the brake shoe.

[0008] Preferably, a first extension portion is provided on the first heat conducting member, and a second extension portion is provided on the second heat conducting member. The first extension portion extends outside the first brake pad, and the second extension portion extends outside the second brake pad.

[0009] Preferably, the material of the cold conduction box includes aluminum.

[0010] Preferably, the brake driving mechanism is a hydraulic brake driving system.

[0011] Preferably, the materials of the first brake pad and the second brake pad include mineral fiber, aramid fiber, and ceramic fiber.

[0012] Preferably, the materials of the first heat conducting member and the second heat conducting member both include copper.

[0013] Preferably, the temperature sensor is a thermocouple sensor or a platinum thermal resistance sensor.

[0014] The present invention has the following beneficial effects: Realize double-point temperature dynamic detection, and the information is more comprehensive. By setting a movable temperature sensor, it abuts against the second heat conducting member and the first heat conducting member respectively before and after braking, so as to detect the temperatures of the second brake pad and the first brake pad in sequence. This double-point detection mode can more accurately reflect the spatial distribution of the thermal state of the brake shoe than a fixed single-point sensor. Description of the Drawings

[0015] The present invention is further described with the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the following drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of a brake shoe detection device with an automatic overheat gap protection function according to the present invention; Figure 2 is an enlarged view of the locking member and the card in the present invention Figure 1 ; Figure 3 is a top view of the support plate in the present invention Figure 1 ; Figure 4 is a schematic structural view of the liquid pump, the cold conduction box, and the liquid storage tank in the present invention Figure 1 ; Figure 5 is a top view of the first heat conduction member, the cold conduction box, the gear, and the gear ring in the present invention Figure 1 ;

[0017] Reference numerals: 1, brake bottom plate; 2, brake shoe; 3, first brake pad; 4, second brake pad; 5, brake driving mechanism; 6, first heat conduction member; 7, second heat conduction member; 8, temperature sensor; 9, wedge plate; 10, mounting plate; 11, first elastic member; 12, card; 13, locking member; 14, groove body; 15, pressing wheel mechanism; 16, support plate; 17, convex portion; 18, liquid pump; 19, gear; 20, connecting rod; 21, cold conduction box; 22, rigid liquid transfer pipe; 23, hub; 24, gear ring; 25, brake drum; 26, second elastic member; 27, liquid storage tank; 28, electromagnet; 29, third elastic member. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium; it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] As Figures 1-2 , Figure 5 shown, a brake shoe detection device with an automatic overheat gap protection function includes a brake back plate 1, a brake shoe 2, and a brake drive mechanism 5. The brake shoe 2 is rotatably connected to the brake back plate 1, and the brake drive mechanism 5 is connected to the brake back plate 1. A first brake pad 3 and a second brake pad 4 are fixedly connected to the brake shoe 2. A first heat conducting member 6 is embedded in the first brake pad 3, and the first heat conducting member 6 extends outside the first brake pad 3. A second heat conducting member 7 is embedded in the second brake pad 4, and the second heat conducting member 7 extends outside the second brake pad 4. A wedge plate 9 is slidably connected to the brake shoe 2. The wedge plate 9 is connected to the brake shoe 2 through a first elastic member 11. A plug 12 and a mounting plate 10 are fixedly connected to the wedge plate 9. A temperature sensor 8 is slidably connected to the mounting plate 10. The mounting plate 10 is connected to the temperature sensor 8 through a third elastic member 29. A locking member 13 is fixedly connected to the brake shoe 2. A groove 14 is formed in the locking member 13, and a push-type elastic self-locking mechanism adapted to the plug 12 is provided in the groove 14. A pressing wheel mechanism 15 is fixedly connected to the brake back plate 1.

[0022] In an optional embodiment of the present invention, the detection device further includes a cooling mechanism that cools the first heat conducting member 6 and the second heat conducting member 7 when the cooling mechanism works.

[0023] As Figures 1-5 shown, in an optional embodiment of the present invention, the cooling mechanism includes a support plate 16, a protrusion 17, a liquid pump 18, a heat conduction box 21, a toothed ring 24, and a liquid storage tank 27. The support plate 16 is fixedly connected to the brake shoe 2. The liquid pump 18 and the heat conduction box 21 are both slidably connected to the support plate 16. The protrusion 17 is fixedly connected to the support plate 16. The liquid pump 18 is connected to the protrusion 17 through a second elastic member 26. An electromagnet 28 is fixedly connected to the protrusion 17. A permanent magnet is embedded in the outer wall of the liquid pump 18. A connecting rod 20 is rotatably connected to the liquid pump 18. A gear 19 is fixedly connected to the connecting rod 20. The gear 19 is located outside the liquid pump 18 and is fixedly connected to a water wheel inside the liquid pump 18. The liquid pump 18 is fixedly connected to the heat conduction box 21 through a rigid liquid transmission pipe 22. The liquid pump 18 is connected to the liquid storage tank 27 through a hose. The heat conduction box 21 is connected to the liquid storage tank 27 through a hose. The liquid storage tank 27 is filled with a coolant. The toothed ring 24 is fixedly connected to the wheel hub 23.

[0024] As Figure 1 shown, in an alternative embodiment according to the present invention, the wedge plate 9 is slidably connected to the guide rails on the brake shoe 2, and the guide rails guide the movement of the wedge plate 9.

[0025] As Figure 1 shown, in an alternative embodiment according to the present invention, the first heat conducting member 6 is provided with a first extension portion, and the second heat conducting member 7 is provided with a second extension portion. The first extension portion extends outside the first brake pad 3, and the second extension portion extends outside the second brake pad 4.

[0026] In an alternative embodiment according to the present invention, the material of the cold guide box 21 includes aluminum, which has good thermal conductivity and is lightweight.

[0027] As Figure 1 shown, in an alternative embodiment according to the present invention, the brake driving mechanism 5 is a hydraulic brake driving system.

[0028] In an alternative embodiment according to the present invention, the materials of the first brake pad 3 and the second brake pad 4 include mineral fiber, aramid fiber, and ceramic fiber.

[0029] In an alternative embodiment according to the present invention, the materials of the first heat conducting member 6 and the second heat conducting member 7 both include copper.

[0030] In an alternative embodiment according to the present invention, the temperature sensor 8 is a thermocouple sensor or a platinum resistance thermometer sensor.

[0031] The thermocouple sensor has advantages such as a wide measurement range, high accuracy, and fast response speed, and can adapt to the high-temperature detection of the brake shoe. The thermocouple sensor has a high accuracy level and can provide accurate temperature measurement within a wide temperature range.

[0032] Implementation process: In the accompanying drawings of the specification, existing components of the braking system are omitted, such as the spring between the two brake shoes 2, etc., and only the innovative parts are drawn. The vehicle control system is an existing technology with data analysis function and component control function, which is not limited herein.

[0033] In the initial state, the pressing wheel mechanism 15 abuts against the wedge plate 9, the first elastic member 11 is in a stretched state, the third elastic member 29 is in a contracted state, the temperature sensor 8 abuts against the second heat conducting member 7, the card 12 is inserted into the slot 14 and locked with the push-button elastic self-locking mechanism, the gear 19 is located in front of the gear ring 24, and the gear 19 does not mesh with the gear ring 24. The heat conduction box 21 is located in front of the first heat conducting member 6 and the second heat conducting member 7, and the heat conduction box 21 does not abut against the first heat conducting member 6 and the second heat conducting member 7, reducing the frictional loss between components.

[0034] When the brake is depressed, the movable part of the brake driving mechanism 5 extends to push the brake shoe 2 to rotate. The pressing wheel mechanism 15 disengages from abutting against the wedge plate 9. Since the card 12 is locked with the push-button elastic self-locking mechanism, the card 12 will rebound a small distance, the first elastic member 11 contracts a small distance, and the wedge plate 9 moves a small distance in the direction of contraction of the first elastic member 11. The temperature sensor 8 remains in contact with the second heat conducting member 7 under the elastic force of the third elastic member 29. The temperature sensor 8 can detect the temperature of the second heat conducting member 7 during the braking process. Since the second heat conducting member 7 is embedded in the second brake pad 4 and has good heat conductivity, the temperature of the second heat conducting member 7 will be relatively close to the temperature of the second brake pad 4. Compared with the traditional technology, it is more accurate to install the temperature sensor 8 directly on the brake shoe 2 to detect the temperature of the brake shoe 2 to judge the temperature of the second brake pad 4.

[0035] After the brake is released, the movable part of the brake driving mechanism 5 contracts, and the brake shoe 2 rotates reversely under the action of the spring. The pressing wheel mechanism 15 presses the wedge plate 9, and the card 12 moves a small distance and is inserted into the slot 14, and the card 12 and the push-button elastic self-locking mechanism are unlocked.

[0036] When braking next time, after the pressing wheel mechanism 15 disengages from abutting against the wedge plate 9, the wedge plate 9 will displace significantly in the direction of contraction of the first elastic member 11, so that the card 12 disengages from the slot 14, and the temperature sensor 8 switches to abut against the first heat conducting member 6, and the third elastic member 29 is stretched, so that the temperature sensor 8 can detect the temperature of the first heat conducting member 6, thereby detecting the temperature of the first brake pad 3. The working principles of other subsequent steps can be easily understood according to the above content and will not be described repeatedly here.

[0037] In this way, after each braking, the temperature sensor 8 can detect the temperatures at two different positions of the brake shoe 2, that is, detect the temperatures of the first brake pad 3 and the second brake pad 4, and comprehensively judge the temperature value of the brake shoe 2 from the temperature values at the two positions, more comprehensively reflecting the temperature distribution. Under different working conditions, there may be regional differences in the temperature rise of the brake shoe 2. The fixed single-point sensor can only collect local temperature data at a single position, easily ignoring the hot spot area or temperature gradient. However, the temperature sensor 8 of the present application alternately detects at two different positions, obtaining more comprehensive temperature distribution information, so as to more accurately reflect the overall thermal state of the brake shoe 2 and improve the accuracy of temperature detection.

[0038] When the temperature value detected by the temperature sensor 8 is higher than the preset value, the vehicle control system controls the electromagnet 28 to be energized to generate a magnetic repulsive force on the permanent magnet on the liquid pump 18, so that the liquid pump 18, the rigid liquid transfer pipe 22, and the heat conduction box 21 move backward after overcoming the second elastic member 26, so that the gear 19 and the gear ring 24 are engaged, and the heat conduction box 21 abuts against the second heat conduction member 7 and the first heat conduction member 6. The rotation of the wheel hub 23 drives the gear ring 24 and the gear 19 to rotate, and the gear 19 drives the water wheel to rotate to generate a centrifugal force, so that the coolant in the liquid storage tank 27 circulates between the liquid pump 18, the heat conduction box 21, and the liquid storage tank 27 through the hose and the rigid liquid transfer pipe 22, thereby taking away the heat on the first heat conduction member 6 and the second heat conduction member 7 and cooling the first brake pad 3 and the second brake pad 4 to prevent damage to the first brake pad 3, the second brake pad 4, and the brake shoe 2 due to excessive temperature.

[0039] Optionally, when the temperature value detected by the temperature sensor 8 is higher than the preset value, the vehicle control system controls the working state of the brake driving mechanism 5, thereby adjusting the angle of the brake shoe 2 to briefly generate a gap between the first brake pad 3 and the second brake pad 4 and the inner wall of the brake drum 25 and then abut against each other, achieving the overheat automatic protection function without overly affecting the braking effect.

[0040] The present invention has the following advantages: realizing dual-point temperature dynamic detection with more comprehensive information. By setting the movable temperature sensor 8 to abut against the second heat conduction member 7 and the first heat conduction member 6 respectively before and after braking, thereby sequentially detecting the temperatures of the second brake pad 4 and the first brake pad 3. This dual-point detection mode can more accurately reflect the spatial distribution of the thermal state of the brake shoe 2 than the fixed single-point sensor; Realizing timely start of the cooling mechanism for temperature rise warning to prevent damage. When the temperature sensor 8 and the electromagnet 28 cooperate, using the rotation of the wheel hub 23 as the driving force to start the cooling cycle, quickly taking away the heat, effectively preventing overheating damage of the braking components; Implement intelligent gap adjustment to achieve overheat protection. In a high-temperature state, the vehicle control system briefly adjusts the rotation angle of the brake shoe 2 by controlling the brake drive mechanism 5, creating a gap between the first brake pad 3, the second brake pad 4 and the brake drum 25, reducing frictional heat generation, and achieving active thermal protection without significantly affecting the braking effect.

[0041] The components, modules, mechanisms, and devices whose structures are not described in detail in the present invention are all common standard parts or parts known to those skilled in the art. Their structures and principles can all be learned from technical manuals by those skilled in the art or obtained through conventional experimental methods.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A brake shoe detection device with an automatic overheat gap protection function, characterized in that It includes a brake backplate, brake shoes, and a brake drive mechanism. The brake shoes are rotatably connected to the brake backplate, and the brake drive mechanism is connected to the brake backplate. A first brake pad and a second brake pad are fixedly connected to the brake shoes. A first heat conducting member is embedded in the first brake pad and extends outside the first brake pad. A second heat conducting member is embedded in the second brake pad and extends outside the second brake pad. A wedge plate is slidably connected to the brake shoes. The wedge plate is connected to the brake shoes through a first elastic member. A plug and an installation plate are fixedly connected to the wedge plate. A temperature sensor is slidably connected to the installation plate. The installation plate is connected to the temperature sensor through a third elastic member. A locking member is fixedly connected to the brake shoes. A groove is formed in the locking member, and a push-type elastic self-locking mechanism adapted to the plug is provided in the groove. A pressing wheel mechanism is fixedly connected to the brake backplate.

2. The brake shoe detection device with an automatic overheat gap protection function according to claim 1, characterized in that, The detection device further includes a cooling mechanism, which cools the first heat conducting member and the second heat conducting member when it works.

3. The brake shoe detection device with an automatic overheat gap protection function according to claim 2, characterized in that, The cooling mechanism includes a support plate, a convex portion, a liquid pump, a heat conduction box, a toothed ring, and a liquid storage tank. The support plate is fixedly connected to the brake shoes. The liquid pump and the heat conduction box are both slidably connected to the support plate. The convex portion is fixedly connected to the support plate. The liquid pump is connected to the convex portion through a second elastic member. An electromagnet is fixedly connected to the convex portion. A permanent magnet is embedded in the outer wall of the liquid pump. A connecting rod is rotatably connected to the liquid pump. A gear is fixedly connected to the connecting rod. The gear is located outside the liquid pump and is fixedly connected to the water wheel in the liquid pump. The liquid pump is fixedly connected to the heat conduction box through a rigid liquid transmission pipe. The liquid pump is connected to the liquid storage tank through a hose. The heat conduction box is connected to the liquid storage tank through a hose. The liquid storage tank is filled with a coolant. The toothed ring is fixedly connected to the wheel hub.

4. The brake shoe detection device with an automatic overheat gap protection function according to claim 3, characterized in that, The wedge plate is slidably connected to the guide rail on the brake shoes.

5. The brake shoe detection device with an automatic overheat gap protection function according to claim 4, characterized in that, The first heat conducting member is provided with a first extension portion, and the second heat conducting member is provided with a second extension portion. The first extension portion extends outside the first brake pad, and the second extension portion extends outside the second brake pad.

6. The brake shoe detection device with an automatic overheat gap protection function according to claim 5, characterized in that, The material of the heat conduction box includes aluminum.

7. A brake shoe detection device with an automatic overheat gap protection function according to any one of claims 1-6, characterized in that, The brake drive mechanism is a hydraulic brake drive system.

8. A brake shoe detection device with an automatic overheat gap protection function according to claim 7, characterized in that, The materials of the first brake pad and the second brake pad include mineral fiber, aramid fiber, and ceramic fiber.

9. The brake shoe detection device with an automatic overheat gap protection function according to claim 7, characterized in that, The materials of the first heat conducting member and the second heat conducting member both include copper.

10. A brake shoe detection device with an automatic overheat gap protection function according to claim 7, characterized in that, The temperature sensor is a thermocouple sensor or a platinum resistance temperature sensor.

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