CN114876987A - Drum brake pad - Google Patents

Drum brake pad Download PDF

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Publication number
CN114876987A
CN114876987A CN202210674573.7A CN202210674573A CN114876987A CN 114876987 A CN114876987 A CN 114876987A CN 202210674573 A CN202210674573 A CN 202210674573A CN 114876987 A CN114876987 A CN 114876987A
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CN
China
Prior art keywords
driving
brake pad
wear detector
slide rail
wear
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.)
Granted
Application number
CN202210674573.7A
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Chinese (zh)
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CN114876987B (en
Inventor
赵怡然
张琨
靳李宁
邱创�
沈远杰
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Zaoyang Hualian Friction Material Co ltd
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Zaoyang Hualian Friction Material Co ltd
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Application filed by Zaoyang Hualian Friction Material Co ltd filed Critical Zaoyang Hualian Friction Material Co ltd
Priority to CN202210674573.7A priority Critical patent/CN114876987B/en
Publication of CN114876987A publication Critical patent/CN114876987A/en
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Publication of CN114876987B publication Critical patent/CN114876987B/en
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    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention discloses a drum brake block, belonging to the technical field of brake blocks, comprising: brake block main part and actuating mechanism. An arc-shaped friction surface is formed on one side of the brake pad main body, an installation groove is formed in the middle of the friction surface along the length direction of the brake pad main body, a slide rail is embedded in the installation groove, a wear detector is connected in the slide rail in a sliding mode, a detection end of the wear detector is arranged in the installation groove and is arranged towards the opening end of the installation groove at intervals so as to detect the wear degree of the friction surface, and the wear detector is electrically connected with an automobile internal controller and an alarm; the driving mechanism comprises a driving part and a transmission part, the driving part is in transmission connection with the wear detector through the transmission part, and the transmission part is used for converting the driving force of the driving part into the reciprocating motion of the wear detector along the extension direction of the slide rail; the invention can realize the detection of the movement of the brake pad along the length direction of the brake pad, realize the omnibearing abrasion detection of the brake pad and improve the detection precision and comprehensiveness.

Description

Drum brake pad
Technical Field
The invention relates to the technical field of brake pads, in particular to a drum type brake pad.
Background
Drum brakes have an iron casting shaped like a tambourine, called a brake drum, which is fixed to the tire and rotates at the same speed. The disc brake has the advantages of better reactivity and stability, better heat dissipation, simple and convenient replacement and the like. Drum brakes are used in many rear wheels of small cars because of their low cost and high absolute braking force. But the wear rate is higher and therefore the overall cost is higher.
Generally, when a friction plate is worn to a limit position, a driver observes and judges the wear condition of the friction plate and then replaces the friction plate, but when the friction plate is worn to the limit position, the braking performance of a brake is greatly influenced, and if the braking plate cannot be replaced in time, safety accidents are easy to occur; the existing detection mode is that a wear detector or a friction surface is additionally arranged on a brake pad to detect the wear condition of the brake pad, but the wear condition of different positions of each brake pad can generate difference according to different types or states of the brake pad, a sensor can not reflect the specific wear condition of the brake pad only through detection of a fixed position, and the detection method has certain sheet surface property and is not ideal in detection precision and detection effect.
Disclosure of Invention
The invention aims to overcome the technical defects and provide a drum brake pad, which solves the technical problem that the detection precision and the detection effect of the brake pad in the prior art are not ideal enough.
In order to achieve the above technical object, a technical solution of the present invention provides a drum brake pad, including:
the brake pad comprises a brake pad main body, wherein an arc-shaped friction surface is formed on one side of the brake pad main body, an installation groove is formed in the middle of the friction surface along the length direction of the brake pad main body, a slide rail is embedded in the installation groove, a wear detector is connected in the slide rail in a sliding mode, a detection end of the wear detector is arranged in the installation groove and is arranged towards the opening end of the installation groove at intervals so as to detect the wear degree of the friction surface, and the wear detector is electrically connected with an automobile internal controller and an alarm;
the driving mechanism comprises a driving part and a transmission part, the driving part is in transmission connection with the wear detector through the transmission part, and the transmission part is used for converting the driving force of the driving part into the reciprocating motion of the wear detector along the extension direction of the slide rail; when any position of the friction surface is abraded to be flush with the abrasion detector, the detection end can be in contact with the brake drum to trigger the alarm to give an alarm through the controller.
In some embodiments, the driving portion includes a first driving member and a second driving member, the transmission portion includes a first winding line and a second winding line, two ends of the sliding rail are respectively provided with a mounting box, the first driving member is disposed on one of the mounting boxes, a driving end of the first driving member is connected to the wear detector through the first winding line and used for generating a driving force for driving the wear detector to slide towards one side close to the first driving member, the second driving member is disposed on the other mounting box, and the driving end of the second driving member is connected to the wear detector through the second winding line and used for generating a driving force for driving the wear detector to slide towards one side close to the first driving member.
In some embodiments, the first driving member includes a first winding roller and a winding motor, the second driving member includes a second winding roller and a scroll spring, the first winding roller is rotatably disposed on one of the mounting boxes, one end of the first winding roller is connected to the wear detector, and the other end of the first winding roller is connected to the first winding roller, the driving end of the winding motor is connected to the first winding roller and is used for driving the first winding roller to rotate so as to wind the first winding roller, the second winding roller is rotatably disposed on the other mounting box, one end of the second winding roller is connected to the wear detector, and the other end of the second winding roller is connected to the second winding roller through the scroll spring.
In some embodiments, the driving portion includes a driving motor, the transmission portion includes a gear and an arc rack, the arc rack is disposed in the mounting groove and is coaxial with the slide rail, the gear is rotatably disposed on the wear detector, the gear is rotatably engaged with the arc rack, and the driving motor is connected with the gear and is used for driving the gear to rotate.
In some embodiments, the drum brake further includes an adjusting mechanism, the adjusting mechanism is connected to the brake pad main body, and one end of the adjusting mechanism, which is close to the slide rail, forms a driving end connected to the slide rail and used for driving the slide rail to move up and down along the height direction of the mounting groove.
In some embodiments, the slide rail includes at least two sliding plates, and an elastic block is connected between two adjacent sliding plates.
In some embodiments, the two sides of each sliding plate are provided with limiting blocks, the groove wall of the mounting groove is provided with limiting grooves parallel to the height direction of the mounting groove at positions corresponding to the limiting blocks, and the limiting blocks are arranged in the limiting grooves and are connected with the limiting grooves in a sliding mode.
In some embodiments, the slide rail may also be a unitary arcuate plate-like structure.
In some embodiments, a sliding groove is formed in one end, close to the friction surface, of the sliding rail along the length direction of the sliding rail, the sliding groove is in a design of a convex structure, and the lower side of the wear detector is in sliding connection with the sliding groove.
In some embodiments, the two sides of the wear detector are both provided with a push block, the push block is connected with the slide rail in a sliding manner, and the cross-sectional area of the push block is gradually increased from one side departing from the slide rail to the other side attached to the slide rail.
Compared with the prior art, the invention has the beneficial effects that: through the arranged brake pad main body, the friction surface and the sliding rail arranged on the brake pad main body and the abrasion detector arranged on the sliding rail, when the friction surface is abraded to a set position, the abrasion detector is flush with the abrasion surface in height, the brake drum can be contacted with the detection end of the abrasion detector, a detection signal is sent to the controller, the alarm is triggered to send an alarm, and a driver is reminded to replace the brake pad; the actuating mechanism that the cooperation set up makes under the drive of drive division and transmission portion, can realize the reciprocating motion of drive abrasion detector along slide rail extending direction, can realize detecting it along the activity of brake block length direction, realizes that the omnidirectional wearing and tearing of brake block detect, has improved the precision and the comprehensive nature that detect.
Drawings
FIG. 1 is a schematic overall perspective view of one embodiment of a drum brake lining according to the present invention;
FIG. 2 is a schematic view of an overall front cross-sectional configuration of one embodiment of the drum brake lining of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;
FIG. 4 is an enlarged view of the structure at B in FIG. 2;
FIG. 5 is a schematic perspective view of a slide rail mounting arrangement of an embodiment of a drum brake assembly according to the present invention;
FIG. 6 is a schematic perspective view of a slide rail mounting arrangement of an embodiment of a drum brake assembly according to the present invention;
FIG. 7 is a schematic sectional elevational view of the actuator assembly of one embodiment of the drum brake assembly of the present invention;
FIG. 8 is a side view, cross-sectional view of a slide rail of an embodiment of a drum brake assembly according to the present invention;
FIG. 9 is a front cross-sectional view of a wear detector in accordance with one embodiment of the drum brake assembly of the present invention.
In the figure: 1. a brake pad main body; 11. a friction surface; 12. mounting grooves; 13. a slide rail; 131. a slide plate; 132. an elastic block; 133. a limiting groove; 134. a chute; 14. a wear detector; 141. a controller; 142. an alarm; 143. a push block; 15. installing a shell; 16. an inductive contact switch; 2. a drive mechanism; 21. a first driving member; 211. a first take-up wire; 212. a first wind-up roll; 213. a winding motor; 22. a second driving member; 221. a second take-up wire; 222. a second wind-up roll; 223. a volute spiral spring; 23. mounting a box; 24. a drive motor; 25. a gear; 26. an arc-shaped rack; 3. an adjustment mechanism; 31. a screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, the present invention provides a drum brake pad, including: a brake pad body 1 and a driving mechanism 2.
An arc-shaped friction surface 11 is formed on one side of the brake pad main body 1, an installation groove 12 is formed in the middle of the friction surface 11 along the length direction of the brake pad main body 1, a sliding rail 13 is embedded in the installation groove 12, a wear detector 14 is connected in the sliding rail 13, a detection end of the wear detection is arranged in the installation groove 12 and is arranged towards the opening end of the installation groove 12 at intervals so as to detect the wear degree of the friction surface 11, and the wear detector 14 is electrically connected with an automobile internal controller 141 and an alarm 142;
the driving mechanism 2 comprises a driving part and a transmission part, the driving part is in transmission connection with the wear detector 14 through the transmission part, and the transmission part is used for converting the driving force of the driving part into the reciprocating motion of the wear detector 14 along the extending direction of the slide rail 13; when any position of the friction surface 11 is worn to a level flush with the wear detector 14, the detection end can contact the brake drum to trigger the alarm 142 by the controller 141.
In the device, after a brake pad main body 1 is installed, a brake operation is carried out by contacting an arc-shaped friction surface 11 with a brake drum, an abrasion detector 14 is connected with a slide rail 13 in a sliding manner, a detection end of the abrasion detection is arranged in an installation groove 12 and is arranged towards the opening end of the installation groove 12 at intervals, when the device is used, the abrasion detector 14 is electrically connected with a control system of an automobile and an alarm 142, when the friction surface 11 is abraded to a set position, the abrasion detector 14 is level with the abrasion surface in height, the brake drum can contact with the detection end of the abrasion detector 14, a detection signal is sent to a controller 141, the alarm 142 is triggered to send an alarm, and a driver is reminded to replace the brake pad; the driving part is in transmission connection with the wear detector 14 through the transmission part, and the transmission part can convert the driving force of the driving part into the reciprocating motion of the wear detector 14 along the extending direction of the slide rail 13, so that the reciprocating motion of the wear detector 14 along the extending direction of the slide rail 13 can be realized under the driving of the driving part and the transmission part, and the detection of any position of the friction surface 11 can be realized.
As shown in fig. 9, in this embodiment, the wear detector 14 includes a mounting housing 15 and an inductive contact switch 16, the mounting housing 15 and the inductive contact switch 16 are both disposed on the mounting groove 12, the inductive contact switch 16 is disposed toward an open end of the mounting groove 12 at intervals, a groove is disposed on a side of the mounting housing 15 close to the inductive contact switch 16, the inductive contact switch 16 is connected to a bottom of the groove by a spring and slidably connected to the groove, and when the inductive contact switch 16 contacts the brake drum, the inductive contact switch 16 can be pressed and retracted into the groove to protect the inductive contact switch 16;
the inductive proximity switch is composed of three major parts: the circuit comprises an oscillator, a switching circuit and an amplifying output circuit. The oscillator generates an alternating magnetic field. When a metal target approaches this magnetic field and reaches an induction distance, eddy currents are generated within the metal target, causing oscillations to decay, or even stop. The oscillation and stop variation of the oscillator is processed by the post-stage amplifying circuit and converted into a switching signal to trigger the controller 141 in the automobile, thereby achieving the purpose of non-contact detection.
As shown in fig. 2, in some embodiments, the driving portion includes a first driving member 21 and a second driving member 22, the transmission portion includes a first winding line 211 and a second winding line 221, two ends of the sliding rail 13 are respectively provided with a mounting box 23, the first driving member 21 is disposed on one of the mounting boxes 23, a driving end of the first driving member 21 is connected to the wear detector 14 through the first winding line 211 and is used for generating a driving force for driving the wear detector 14 to slide toward a side close to the first driving member 21, the second driving member 22 is disposed on the other mounting box 23, a driving end of the second driving member 22 is connected to the wear detector 14 through the second winding line 221 and is used for generating a driving force for driving the wear detector 14 to slide toward a side close to the first driving member, and the first driving member 21 is connected to the wear detector 14 through the first winding line 211 and the second winding line 221, the second driving member 22 is connected to the wear detector 14 through the second reeling line 221, and can generate a driving force for driving the wear detector 14 to slide toward the side close to the second driving member 22, so as to drive the wear detector 14 to reciprocate along the extension direction of the slide rail 13, adjust the sliding position of the wear detector 14 on the slide rail 13, enable the wear detector 14 to move along the length direction of the friction surface 11, and realize multi-directional wear detection of the friction surface 11;
the drum brake pad further comprises an adjusting mechanism 3, the adjusting mechanism 3 is connected with the brake pad main body 1, one end, close to the slide rail 13, of the adjusting mechanism 3 is formed into a driving end which is connected with the slide rail 13 and used for driving the slide rail 13 to move up and down along the height direction of the mounting groove 12, the adjusting mechanism 3 which is arranged is provided with a driving end which is connected with the slide rail 13 and used for driving the slide rail 13 to move up and down along the height direction of the mounting groove 12, further, the distance between the slide rail 13 and the friction surface 11 can be adjusted through the adjusting mechanism 3, adjustment of the distance between the detection end of the abrasion detector 14 and the friction surface 11 can be achieved, and the adaptability of the abrasion detector 14 and the brake pad main body 1 is higher.
As shown in fig. 2 to 4, in some embodiments, the first driving member 21 includes a first wind-up roll 212 and a wind-up motor 213, the second driving member 22 includes a second wind-up roll 222 and a scroll spring 223, the first wind-up roll 212 is rotatably disposed on one of the mounting boxes 23, one end of the first wind-up roll 211 is connected to the wear detector 14, the other end is connected to the first wind-up roll 212, a driving end of the wind-up motor 213 is connected to the first wind-up roll 212 and drives the first wind-up roll 212 to rotate so as to wind up the first wind-up roll 212, the second wind-up roll 222 is rotatably disposed on the other mounting box 23, one end of the second wind-up roll 221 is connected to the wear detector 14, the other end is connected to the second wind-up roll 222 through the scroll spring 223, specifically, the wind-up motor 213 is connected to one side of the brake pad body 1, and an output shaft thereof is connected to the first wind-up roll 212 through the brake pad body 1 and the mounting box 23, an output shaft of the winding motor 213 is connected with the brake pad main body 1 and the mounting box 23 through a bearing, stable transmission rotation can be achieved, the winding motor 213 can drive the first winding roller 212 to rotate through the arranged first winding wire 211, the first winding roller 212 and the winding motor 213, winding and unwinding of the first winding wire 211 can be achieved when the first winding roller 212 rotates, the abrasion detector 14 can be pulled to one side close to the first winding roller 212 when winding is conducted, and the abrasion detector 14 can be driven to slide to one side close to the first driving piece 21.
As shown in fig. 2 and 5, in some embodiments, the sliding rail 13 includes at least two sliding plates 131, an elastic block 132 is connected between two adjacent sliding plates 131, the sliding rail 13 is configured as at least two sliding plates 131, and the elastic block 132 is connected between two adjacent sliding plates 131, the sliding rail 13 is configured to be suitable for a brake pad with a small arc, the sliding rail 13 is configured as a plurality of sliding plates 131, the distance between the sliding plates 131 and the friction surface 11 can be adjusted in a segmented manner, so as to ensure the accuracy of adjusting the detection position of the wear detector 14, and the sliding plates 131 are connected by the elastic block 132, the elastic block 132 is made of an extensible plastic material, so that the connection state of the two sliding plates 131 before and after adjustment can be ensured, so as to engage the two sliding plates 131, and ensure the sliding relationship between the sliding rail 13 and the wear detector 14;
specifically, when the slide rail 13 includes at least two sliding plates 131, the adjusting mechanism 3 includes at least two adjusting members, the adjusting members are screws 31, each screw 31 is in threaded connection with the brake pad body 1, and one end of each screw 31 close to the friction surface 11 is in one-to-one correspondence to be rotatably connected with the sliding plate 131, so that each screw 31 is correspondingly connected with one sliding plate 131, the screw 31 is in threaded connection with the brake pad body 1, so that the screw 31 can rotate on the brake pad body 1, and the sliding of the sliding plate 131 along the height direction of the installation groove 12 can be further realized;
both sides at every slide 131 both ends all are equipped with the stopper, the spacing groove 133 parallel with the direction of height of mounting groove 12 is seted up with the position department that the cell wall of mounting groove 12 corresponds with the stopper, place spacing groove 133 in the stopper in and with spacing groove 133 sliding connection, through stopper and the spacing groove 133 that sets up, make and utilize the sliding relation of stopper and spacing groove 133 to restrict slide 131's moving direction, thereby it is more accurate when adjusting slide 131 position to make, do benefit to the detection precision after the improvement wear detector 14 adjusts.
As shown in fig. 2 and 6, in some embodiments, the slide rail 13 may also be an integral arc-shaped plate-shaped structure, by arranging the slide rail 13 into the integral arc-shaped plate-shaped structure, the slide rail 13 is suitable for a brake pad with a large radian, and by arranging the slide rail 13 into an integral structure, the position of the slide rail 13 can be conveniently and directly adjusted in a subsequent step, and the use is simple and convenient;
specifically, when the slide rail 13 is of an integral arc-shaped plate structure, the adjusting mechanism 3 includes at least one adjusting member, the adjusting member is a screw 31, each screw 31 is in threaded connection with the brake pad body 1, and one end of each screw 31, which is close to the friction surface 11, is rotatably connected with the slide rail 13, so that the slide rail 13 can be driven to slide along the height direction of the mounting groove 12 by rotating the screw 31 on the brake pad body 1; specifically, the adjusting mechanism 3 may also use an electric driving rod to drive the sliding rail 13.
As shown in fig. 5 and 6, in some embodiments, the pushing blocks 143 are disposed on both sides of the wear detector 14, the pushing blocks 143 are slidably connected to the sliding rail 13, and the cross-sectional area of the pushing blocks 143 gradually increases from one side away from the sliding rail 13 to another side attached to the sliding rail 13.
As shown in fig. 5, 6, and 8, in some embodiments, a sliding groove 134 is formed in one end of the sliding rail 13 close to the friction surface 11 along a length direction of the sliding rail 13, the sliding groove 134 is in a "convex" shape structure design, a lower side of the wear detector 14 is slidably connected to the sliding groove 134, and the sliding block can be limited to slide in the groove through the "convex" shape structure design by the sliding groove 134 and the sliding block, so that the wear detector 14 is limited, and the wear detector 14 is prevented from being separated from the sliding rail 13.
As shown in fig. 7, in some embodiments, the driving portion includes a driving motor 24, the transmission portion includes a gear 25 and an arc rack 26, the arc rack 26 is disposed in the mounting groove 12 and is coaxially disposed with the slide rail 13, the gear 25 is rotatably disposed on the wear detector 14, and the gear 25 is engaged with the arc rack 26 for rotation, the driving motor 24 is connected with the gear 25 and drives the gear 25 to rotate, specifically, the driving motor 24 is disposed on one side of the brake pad main body 1, the driving motor 24 is mounted on a sliding plate slidably connected with the brake pad main body 1, the driving motor 24, the gear 25 and the arc rack 26 are disposed, so that the driving motor 24 can drive the gear 25 to rotate, the gear 25 rotates on the arc rack 26, and further, the driving gear 25 is rotated forward or reversely rotated at the driving motor 24, so as to drive the wear detector 14 to reciprocate along the length direction of the arc rack 26, since the arc-shaped rack 26 is arranged coaxially with the slide rail 13, a reciprocating movement of the wear detector 14 in the extending direction of the slide rail 13 can be driven.
The working principle is as follows: after the device is installed, the adjusting mechanism 3 is needed to adjust the position of the slide rail 13 in the installation groove 12 to adjust the distance between the abrasion detector 14 and the friction surface 11, when the device is used for braking, the brake pad is contacted with the brake drum to generate friction force to wear the friction surface 11 of the brake pad, after the device is used for a period of time, the driving mechanism 2 can be started during the vehicle passing through the brake, the driving mechanism 2 is used for driving the abrasion detector 14 to move back and forth along the extension direction of the slide rail 13 to adjust the position of the abrasion detector 14, when the friction surface 11 is worn to a set position, the brake drum can be contacted with the detection end of the abrasion detector 14, a detection signal is sent to the controller 141, and the alarm 142 is triggered to send an alarm to remind a driver of replacing the brake pad.
According to the brake pad, the brake pad main body 1, the friction surface 11 and the sliding rail 13 which are arranged on the brake pad main body 1 and the abrasion detector 14 which is arranged on the sliding rail 13 are arranged, when the friction surface 11 is abraded to a set position, the abrasion detector 14 is flush with the abrasion surface in height, a brake drum can be contacted with the detection end of the abrasion detector 14, a detection signal is sent to the controller 141, the alarm 142 is triggered to send an alarm, and a driver is reminded to replace the brake pad; the actuating mechanism 2 that the cooperation set up makes under the drive of drive division and transmission portion, can realize the reciprocating motion of drive abrasion detector 14 along slide rail 13 extending direction, can realize detecting it along the long direction activity of brake block, realizes the all-round wearing and tearing of brake block and detects, has improved the precision and the comprehensiveness that detect.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A drum brake pad, comprising:
the brake pad comprises a brake pad main body, wherein an arc-shaped friction surface is formed on one side of the brake pad main body, an installation groove is formed in the middle of the friction surface along the length direction of the brake pad main body, a slide rail is embedded in the installation groove, a wear detector is connected in the slide rail in a sliding mode, the detection end of the wear detection is arranged in the installation groove and faces the opening end of the installation groove at intervals so as to detect the wear degree of the friction surface, and the wear detector is electrically connected with an automobile internal controller and an alarm;
the driving mechanism comprises a driving part and a transmission part, the driving part is in transmission connection with the wear detector through the transmission part, and the transmission part is used for converting the driving force of the driving part into the reciprocating motion of the wear detector along the extension direction of the slide rail; when any position of the friction surface is worn to be flush with the wear detector, the detection end can be in contact with the brake drum to supply the controller to trigger the alarm to give an alarm.
2. The drum brake pad of claim 1, wherein the driving portion includes a first driving member and a second driving member, the transmission portion includes a first winding wire and a second winding wire, the two ends of the slide rail are respectively provided with a mounting box, the first driving member is disposed on one of the mounting boxes, and the driving end of the first driving member is connected to the wear detector through the first winding wire and used for generating a driving force for driving the wear detector to slide toward a side close to the first driving member, the second driving member is disposed on the other mounting box, and the driving end of the second driving member is connected to the wear detector through the second winding wire and used for generating a driving force for driving the wear detector to slide toward a side close to the first driving member.
3. The drum brake according to claim 2, wherein the first driving member includes a first winding roller and a winding motor, the second driving member includes a second winding roller and a spiral spring, the first winding roller is rotatably disposed on one of the mounting boxes, one end of the first winding wire is connected to the wear detector, the other end of the first winding wire is connected to the first winding roller, a driving end of the winding motor is connected to the first winding roller and is configured to drive the first winding roller to rotate so as to wind the first winding roller, the second winding roller is rotatably disposed on the other mounting box, one end of the second winding wire is connected to the wear detector, and the other end of the second winding wire is connected to the second winding roller through the spiral spring.
4. The drum brake pad of claim 1, wherein the driving portion includes a driving motor, the transmission portion includes a gear and an arc rack, the arc rack is disposed in the mounting groove and is coaxial with the sliding rail, the gear is rotatably disposed on the wear detector, the gear is engaged with the arc rack and is rotatably connected to the arc rack, and the driving motor is connected to the gear and is configured to drive the gear to rotate.
5. The drum brake assembly of claim 1, further comprising an adjustment mechanism coupled to the brake block body, wherein the adjustment mechanism includes a drive end coupled to the slide rail and configured to drive the slide rail to move up and down along the height of the mounting slot near an end of the slide rail.
6. The drum brake assembly as defined in claim 1, wherein the track comprises at least two sliding plates, and the resilient block is connected between two adjacent sliding plates.
7. The drum brake of claim 6, wherein the two sides of each sliding plate are provided with a limiting block, a position of the groove wall of the mounting groove corresponding to the limiting block is provided with a limiting groove parallel to the height direction of the mounting groove, and the limiting block is disposed in the limiting groove and slidably connected to the limiting groove.
8. The drum brake assembly as set forth in claim 1 wherein said rail is further of a one-piece arcuate plate-like construction.
9. The drum brake pad according to claim 1, wherein a sliding groove is formed at an end of the sliding rail close to the friction surface along a length direction of the sliding rail, the sliding groove is designed to have a structure of a "convex" shape, and a lower side of the wear detector is slidably connected to the sliding groove.
10. The drum brake pad of claim 1, wherein the wear detector has push blocks on both sides thereof, the push blocks are slidably connected to the slide rails, and the cross-sectional area of the push blocks increases from one side away from the slide rails to the other side attached to the slide rails.
CN202210674573.7A 2022-06-15 2022-06-15 Drum brake block Active CN114876987B (en)

Priority Applications (1)

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CN202210674573.7A CN114876987B (en) 2022-06-15 2022-06-15 Drum brake block

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11351296A (en) * 1998-06-04 1999-12-24 Tokyo Buhin Kogyo Co Ltd Brake lining wear detection device
JP2004286087A (en) * 2003-03-20 2004-10-14 Hanex Co Ltd Method for detecting abrasion
CN203130872U (en) * 2013-02-04 2013-08-14 湖北华夏弘景车桥股份有限公司 Brake structure
CN104110450A (en) * 2014-04-22 2014-10-22 衢州兰玲机电科技有限公司 Automobile drum brake
CN207364140U (en) * 2017-11-07 2018-05-15 魏东 A kind of brake shoe for being conveniently replaceable friction plate
DE102019113004A1 (en) * 2018-06-20 2019-12-24 GM Global Technology Operations LLC DETECTING A FRICTION BRAKE FAULT
DE202018106957U1 (en) * 2018-12-06 2020-03-09 Alois Kober Gmbh Drum brake with a sensor arrangement
CN210423526U (en) * 2019-05-31 2020-04-28 高邮市宏生制动器厂 Drum brake with abrasion alarming function
CN111503193A (en) * 2020-04-15 2020-08-07 临沂合力电子有限公司 Variable voltage wear sensor
CN112460174A (en) * 2020-12-15 2021-03-09 派德森（京山）汽车零部件有限公司 Brake, brake shoe abrasion alarm mechanism and alarm method thereof and EBS system
CN213206378U (en) * 2020-07-11 2021-05-14 郑州白云实业有限公司 Drum brake block capable of preventing adhesion
CN113565904A (en) * 2021-06-16 2021-10-29 高邮市顺达动力机电有限公司 Drum brake system with abrasion alarming function
CN215762975U (en) * 2021-08-12 2022-02-08 无锡晶华汽车制动器有限公司 Alarm device for abrasion of brake friction plate
CN216343581U (en) * 2021-10-26 2022-04-19 平阳县锦通汽车配件有限公司 Sensor for alarming abrasion of drum type automobile brake pad

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11351296A (en) * 1998-06-04 1999-12-24 Tokyo Buhin Kogyo Co Ltd Brake lining wear detection device
JP2004286087A (en) * 2003-03-20 2004-10-14 Hanex Co Ltd Method for detecting abrasion
CN203130872U (en) * 2013-02-04 2013-08-14 湖北华夏弘景车桥股份有限公司 Brake structure
CN104110450A (en) * 2014-04-22 2014-10-22 衢州兰玲机电科技有限公司 Automobile drum brake
CN207364140U (en) * 2017-11-07 2018-05-15 魏东 A kind of brake shoe for being conveniently replaceable friction plate
DE102019113004A1 (en) * 2018-06-20 2019-12-24 GM Global Technology Operations LLC DETECTING A FRICTION BRAKE FAULT
DE202018106957U1 (en) * 2018-12-06 2020-03-09 Alois Kober Gmbh Drum brake with a sensor arrangement
CN210423526U (en) * 2019-05-31 2020-04-28 高邮市宏生制动器厂 Drum brake with abrasion alarming function
CN111503193A (en) * 2020-04-15 2020-08-07 临沂合力电子有限公司 Variable voltage wear sensor
CN213206378U (en) * 2020-07-11 2021-05-14 郑州白云实业有限公司 Drum brake block capable of preventing adhesion
CN112460174A (en) * 2020-12-15 2021-03-09 派德森（京山）汽车零部件有限公司 Brake, brake shoe abrasion alarm mechanism and alarm method thereof and EBS system
CN113565904A (en) * 2021-06-16 2021-10-29 高邮市顺达动力机电有限公司 Drum brake system with abrasion alarming function
CN215762975U (en) * 2021-08-12 2022-02-08 无锡晶华汽车制动器有限公司 Alarm device for abrasion of brake friction plate
CN216343581U (en) * 2021-10-26 2022-04-19 平阳县锦通汽车配件有限公司 Sensor for alarming abrasion of drum type automobile brake pad

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