Self-friction power-assisted brake structure and stay wire disc brake

Abstract

The utility model relates to a self-friction power-assisted brake structure and a stay wire disc brake. The self-friction power-assisted brake structure is matched with a brake caliper body, the brake caliper body is composed of a first caliper body and a second caliper body, a brake cavity with an opening in one side is formed in the middle of the brake caliper body, and a brake part is arranged in the brake cavity and provided with a first brake unit and a second brake unit. The first caliper body is internally provided with a driving piece used for pushing the first brake unit to move so as to press the brake disc, and the first end of the pull rod is rotationally assembled with the upper end of the first caliper body and is connected with the driving end of the driving piece; and the self-friction assisting part is arranged in the second caliper body and used for lifting the second brake unit to cooperate with the first brake unit to clamp and brake the brake disc when the first brake unit presses the brake disc to deform and makes contact with the second brake unit. The self-friction power assisting piece automatically works when the brake disc deforms and is triggered, reverse thrust on the brake disc relative to the first brake unit is generated, deformation of the brake disc is effectively corrected, loss of brake force is reduced, and the service life of the brake disc is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of two-wheeled vehicle accessories, specifically to a self-friction-assisted braking structure and a cable disc brake. Background Technology

[0002] Disc brakes currently have two control transmission methods: cable disc brakes and hydraulic disc brakes. Hydraulic disc brakes are more expensive, so they are mostly installed on high-end bicycles or professional racing bikes. Compared with hydraulic disc brakes, cable disc brakes have a simpler structure and lower cost. Due to the limited production cost of bicycles, cable disc brakes are still widely installed and used on bicycles.

[0003] In a traditional disc brake, the first brake pad is movably connected to the brake caliper and to a lever, while the second brake pad is fixedly connected to the brake caliper. During initial braking, the first brake pad moves relative to the brake caliper and contacts the disc, while the second brake pad does not. During sustained braking, the first brake pad compresses the disc (i.e., the part of the disc in contact with the first brake pad bends towards the second brake pad relative to the rest of the disc) to bring it into contact with the second brake pad, thus achieving braking.

[0004] However, in the above-mentioned solution, the contact area between the deformed disc and the first and second brake pads during braking is small, resulting in significant braking force loss. Furthermore, the lifespan of the deformed disc will be shortened over time. Therefore, there is an urgent need in the market for a cable-operated disc brake that can correct disc deformation during braking and reduce braking force loss. Utility Model Content

[0005] This application provides a self-friction-assisted braking structure and a cable-operated disc brake, which reduces the pressure deformation of the disc brake disc compared to existing traditional mechanical disc brakes. The disc has a larger contact area with the first and second brake pads during braking, resulting in better braking performance.

[0006] In a first aspect, this application provides a self-friction assisted braking structure, which is configured in conjunction with a brake caliper. The brake caliper consists of a first caliper and a second caliper, and has a brake cavity with one open side in its middle. A braking element is provided in the brake cavity. The braking element has a first braking unit and a second braking unit. A driving member for pushing the first braking unit to displace and press against the brake disc is provided in the first caliper. The structure also includes:

[0007] The first end of the pull rod is rotatably assembled with the upper end of the first clamp body and connected to the drive end of the drive component;

[0008] The self-friction assist component is disposed in the second clamp body and is used to lift the second braking unit to cooperate with the first braking unit in clamping and braking the brake disc when the first braking unit compresses the brake disc and deforms it and contacts the second braking unit.

[0009] Optionally, the braking element includes:

[0010] The first braking unit includes a first brake pad back plate and a first brake pad, wherein the first brake pad back plate is disposed in a first groove opened in the braking cavity to limit rotation.

[0011] The second braking unit is symmetrically arranged with the first braking unit and includes a second brake pad back plate and a second brake pad. The second brake pad back plate is embedded in the first end of the self-friction assist member to limit rotation.

[0012] The guide pin is inserted into and fitted with the first brake pad back plate and the second brake pad back plate and fixed on the brake caliper body, so as to position the first brake pad back plate and the second brake pad back plate in the brake cavity and not interfere with the movement of the lever.

[0013] Optionally, the self-friction booster includes:

[0014] The slider has a second groove at its first end that matches the second brake pad backing plate for embedded assembly, a first pin groove, and a first assembly groove that connects to the first pin groove and extends to the second end of the slider. The second end of the slider has a plurality of third teardrop-shaped channels that extend along the direction of movement of the brake disc.

[0015] The slide block is fixedly assembled to the second clamp body by a number of screws, and its first end has a sliding surface that matches the slider and limits the slider to slide in the direction of movement of the brake disc. The sliding surface is provided with a number of fourth water drop ball tracks that match the third water drop ball track, and its second end is provided with a second pin groove and a second assembly groove that connects to the second pin groove and extends to the first end of the slide block.

[0016] The second transmission ball, in number several, has its rolling limit located within the lower water drop ball channel formed by the combination of the third and fourth water drop ball channels. The lower water drop ball channel is arranged at an upward slope along the sliding direction of the slider.

[0017] A tension spring, which is inclinedly disposed in the first assembly slot and the second assembly slot;

[0018] There are two pins, which are respectively fitted into the first pin groove and the second pin groove and connected to the two ends of the tension spring.

[0019] Optionally, the driving element includes:

[0020] An active push rod rotates axially within a movable cavity in the middle of the first clamp body, and its first end is fixedly assembled with the first end of the pull rod by a pull rod screw, and its second end has a plurality of first water droplet ball channels arranged in a ring array.

[0021] The driven push rod is non-rotationally limited to the movable cavity, and its first end abuts against the second end of the active push rod and has a plurality of second water drop ball channels that match the first water drop ball channel.

[0022] The first transmission ball, in number several, has its rolling limit located within the upper water drop ball track formed by the combination of the first water drop ball track and the second water drop ball track. The upper water drop ball track is set at an upward slope along the rotation direction of the active push rod.

[0023] A compression spring is disposed in the movable cavity, with its first end abutting against the second end of the driven push rod, and its second end abutting against the screw cap, the screw cap being threadedly assembled with the movable cavity;

[0024] A brake lever is fitted to the second end of the driven push rod, and its free end extends out of the screw cap and has a pressing portion that abuts against the first brake unit.

[0025] Optionally, an assembly step is formed on the annular sidewall of the active push rod, and a plane bearing and an upper pad are sequentially fitted on the assembly step, with the movable surface of the plane bearing contacting the assembly step and the upper pad respectively.

[0026] Optionally, the brake lever is threaded to the second end of the driven push rod to adjust the length of the brake lever extending out of the screw cap.

[0027] Optionally, a buffer pad is installed on the side of the slider that is opposite to the direction of movement of the brake disc.

[0028] Optionally, the braking element further includes:

[0029] At least two strong magnets are respectively disposed on opposite sides of the first brake pad back plate and the second brake pad back plate to magnetically connect the braking component and the self-friction booster component.

[0030] Secondly, this application provides a cable disc brake, which includes the self-friction-assisted braking structure proposed in the first aspect above.

[0031] Optionally, the second end of the pull rod is provided with a wire pressing plate and a guide portion. The wire pressing plate is assembled to the second end of the pull rod by a wire pressing screw to fix the first end of the pull cable. The second end of the pull cable changes the cable routing direction through the guide portion and passes through a wire threading pin and connects to the brake lever. The wire threading pin is assembled on a base formed on the outside of the first clamp body.

[0032] Compared to related technologies, the self-friction-assisted braking structure and cable disc brake provided in this application have at least the following technical advantages:

[0033] By incorporating a self-friction booster, the drive unit pushes the first braking unit to displace, pressing against the brake disc and causing it to deform. The deformed brake disc shifts towards and contacts the second braking unit. The friction between the brake disc and the second braking unit causes the slider to slide and lift along the direction of brake disc movement under the limitation of the slide block, thus pushing against the brake disc in the opposite direction and completing the brake assist process. This self-friction booster automatically operates when the brake disc deforms, generating a reverse thrust on the brake disc relative to the first braking unit. This effectively corrects the deformation of the brake disc, reduces braking force loss, and increases the disc's service life. Simultaneously, it makes the friction surfaces between the brake disc and the two braking units more ideal, resulting in greater braking force output.

[0034] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is one of the three-dimensional structural diagrams of a cable disc brake with a self-friction-assisted braking structure, according to an exemplary embodiment.

[0037] Figure 2 This is the second perspective view of a cable disc brake with a self-friction-assisted braking structure, according to an exemplary embodiment.

[0038] Figure 3 This is an exploded view of a cable disc brake structure with a self-friction-assisted braking structure, according to an exemplary embodiment.

[0039] Figure 4 This is a vertical sectional view of a self-friction-assisted braking structure according to an exemplary embodiment.

[0040] Figure 5 This is a three-dimensional structural schematic diagram of an active push rod according to an exemplary embodiment.

[0041] Explanation of reference numerals in the attached drawings: Brake caliper body 10; First caliper body 101; Second caliper body 102; Movable cavity 103; Keyway groove 104; Assembly wing 105; Base 106; Limiting groove 107; Caliper bolt 108;

[0042] Pull rod 20; wire clamping plate 201; wire clamping screw 202; guide part 203;

[0043] Driven component 30; driven push rod 301; second water droplet ball track 3011; positioning key 3012; active push rod 302; assembly step 3021; ​​plane bearing 303; upper pad 304; compression spring 305; screw cap 306; brake rod 307; top pressing part 3071; pull rod screw 308; first transmission ball 309;

[0044] Self-friction booster 40; slider 401; second groove 4011; slide block 402; first assembly groove 403; first pin groove 404; pin 405; tension spring 406; buffer pad 407; second assembly groove 408; fourth teardrop ball track 409; third teardrop ball track 410; second transmission ball 411.

[0045] Braking component 50; first braking unit 501; second braking unit 502; guide pin 503; strong magnet 504; wire threading pin 60; brake disc 70. Detailed Implementation

[0046] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] In related technologies, in traditional disc brakes, the first brake pad is movably connected to the brake caliper and connected to a lever, while the second brake pad is fixedly connected to the brake caliper. During initial braking, the first brake pad moves relative to the brake caliper and contacts the disc, while the second brake pad does not. During sustained braking, the first brake pad compresses the disc (i.e., the part of the disc in contact with the first brake pad bends towards the second brake pad relative to the other parts) to make contact with the second brake pad, thus achieving braking. However, in the above scheme, the contact area between the deformed disc and the first and second brake pads is small, resulting in significant braking force loss, and the lifespan of the deformed disc is correspondingly shortened.

[0050] Based on the above, this utility model provides a self-friction-assisted braking structure and a cable disc brake, which will be described in detail below with reference to specific embodiments and accompanying drawings.

[0051] Example 1

[0052] Embodiment 1 of this utility model provides a self-friction-assisted braking structure. Figure 1 This is one of the three-dimensional structural diagrams of a cable disc brake with a self-friction-assisted braking structure, according to an exemplary embodiment. Figure 2 This is the second perspective view of a cable disc brake with a self-friction-assisted braking structure, according to an exemplary embodiment. Figure 3 This is an exploded view of a cable disc brake structure with a self-friction-assisted braking structure, according to an exemplary embodiment. Figure 1-3 As shown, the self-friction assisted brake structure is equipped with a brake caliper 10. The brake caliper 10 consists of a first caliper 101 and a second caliper 102, and has a brake chamber with one side open in the middle. The brake chamber is equipped with a brake element 50. The first caliper 10 is equipped with a drive element 40 for pushing the brake element 50 to move and clamp the brake disc. Specifically, the first caliper 101 and the second caliper 102 are fixed by a number of caliper bolts 108, and the first caliper 101 has an integrally formed mounting wing 105 for mounting the brake caliper 10 on the vehicle frame with the bolts.

[0053] Continue to refer to the appendix Figure 1-3The braking chamber is provided with a braking component 50. In this embodiment, the braking component 50 includes: a first braking unit 501, which includes a first brake pad back plate and a first brake pad, and the first brake pad back plate is disposed in a first groove 107 opened in the braking chamber to limit rotation; a second braking unit 502, which is symmetrically arranged with the first braking unit 501, and includes a second brake pad back plate and a second brake pad, the second brake pad back plate being embedded in the first end of the self-friction assist component 40 to limit rotation; a guide pin 503, which is inserted into and assembled with the first brake pad back plate and the second brake pad back plate and fixed on the brake caliper body 10 to position the two brake pad back plates in the braking chamber and not interfere with the movement of the pull rod 20; and a strong magnet 504, of which there are at least two, which are respectively disposed on the opposite sides of the first brake pad back plate and the second brake pad back plate to magnetically connect the braking component 50 and the self-friction assist component 40 respectively.

[0054] The first clamp body 101 is provided with a drive member 30 for pushing the first braking unit 501 to displace and press against the brake disc 70, and also includes:

[0055] The first end of the pull rod 20 is rotatably assembled with the upper end of the first clamp body 101 and connected to the drive end of the drive component 30.

[0056] The self-friction assist component 40 is disposed in the second clamp body 102 and is used to lift the second braking unit 502 to cooperate with the first braking unit 501 to clamp and brake the brake disc 70 when the first braking unit 501 presses the brake disc 70 to deform and contact the second braking unit 502.

[0057] In this embodiment, Figure 4 This is a vertical sectional view of a self-friction-assisted braking structure according to an exemplary embodiment. (Continue referring to the appendix...) Figure 1-4 The self-friction booster component 40 includes:

[0058] The slider 401 has a second groove 4011 for fitting the second brake pad backplate, a first pin groove 404, and a first mounting groove 403 that connects to the first pin groove 404 and extends to the second end of the slider 401. The second end of the slider 401 has a plurality of third teardrop ball tracks 410 extending along the movement direction of the brake disc 70.

[0059] The slide block 402 is fixedly mounted on the second clamp body 102 by a number of screws 4021, and its first end has a sliding surface that matches the slider 401 and limits the slider 401 to slide in the direction of movement of the brake disc 70. A number of fourth water drop ball channels 409 that match the third water drop ball channel 410 are provided on the sliding surface, and a second pin groove and a second assembly groove 408 that connects to the second pin groove and extends to the first end of the slide block 402 are provided at its second end.

[0060] The second transmission ball 411, there are several of them, and its rolling limit is located in the lower water drop ball channel formed by the combination of the third water drop ball channel 410 and the fourth water drop ball channel 409. The lower water drop ball channel is set up at an upward slope along the sliding direction of the slider 401.

[0061] A tension spring 406 is inclinedly disposed within the first assembly groove 403 and the second assembly groove 408;

[0062] There are two pins 405, which are respectively positioned and fitted in the first pin groove 404 and the second pin groove and connected to the two ends of the tension spring 406.

[0063] In the above embodiment, when the pull rod 20 rotates, the driving end of the traction drive member 30 is driven to push the first braking unit 501 to move so as to press the brake disc 70 and deform the brake disc 70. The deformed brake disc 70 is offset towards the second braking unit 502 and contacts the second braking unit 502.

[0064] At this time, the brake disc 70 is still rotating with the wheel. The friction between the brake disc 70 and the second brake unit 502 will cause the slider 401 to slide along the direction of movement of the brake disc 70 under the limit of the slider 402. Since the lower water droplet ball track is set at an upward slope along the sliding direction of the slider 401, during the movement of the slider 401 along the direction of movement of the brake disc 70 caused by the friction, the second transmission ball 411 gradually moves uphill, pushing the slider 401 and the second brake unit 502 to rise in the opposite direction of movement of the first brake unit 501 and towards the brake. The brake disc 70 is gradually pressurized, and the reverse thrust resists the brake disc 70. In conjunction with the first braking unit 501, the brake disc 70 is clamped and braked, completing the brake assist force application process. The self-friction booster 40 works automatically when the brake disc 70 is deformed and triggered, generating a reverse thrust on the brake disc relative to the first braking unit 501. This effectively corrects the deformation of the brake disc 70, reduces the loss of braking force, and increases the service life of the brake disc 70. At the same time, it makes the friction surface between the brake disc 70 and the two braking units more ideal, resulting in greater braking force output.

[0065] Meanwhile, it is understandable that since there is an efficiency loss in the axial thrust added to the drive member 30, and the reverse thrust of the self-friction booster 40 on the brake disc 70 will only affect the working state of the drive member 30 when it is much greater than the pressure applied to the brake disc 70 by the first braking unit 501, the brake caliper 10 with the added self-friction booster 40 will have a greater braking force.

[0066] Furthermore, when braking ends, the drive component 30 resets, the first braking unit 501 disengages from the brake disc 70, the brake disc 70 recovers its deformation and the friction with the second braking unit 502 decreases rapidly. At this time, the tension spring 406 drives the slider component 401 to reset and descend in the opposite direction, and the second braking unit 502 disengages from the brake disc 70.

[0067] In this embodiment, please continue to refer to Appendix Figure 3 A buffer pad 407 is installed on the side of the slider 401 opposite to the direction of movement of the brake disc 70 to prevent the tension spring 406 from driving the slider 401 to reset too quickly and collide with the second clamp 102 to produce abnormal noise.

[0068] In this embodiment, Figure 5 This is a three-dimensional structural schematic diagram of an active push rod according to an exemplary embodiment. (Refer to the attached diagram.) Figure 1-5 The drive component 30 includes:

[0069] The active push rod 302 rotates axially within the movable cavity 103 in the middle of the first clamp body 101, and its first end is fixedly assembled with the first end of the pull rod 20 by the pull rod screw 308. Its second end has a plurality of first water droplet ball channels arranged in a ring array. Further, an assembly step 3021 is formed on the annular side wall of the active push rod 302. A plane bearing 303 and an upper pad 304 are sequentially fitted on the assembly step 3021. The movable surface of the plane bearing 303 contacts the assembly step 3021 and the upper pad 304 respectively.

[0070] The driven push rod 301 is non-rotationally limited to the movable cavity 103. Specifically, the driven push rod 301 has at least one positioning key 3012 in the circumferential direction, and the positioning key 3012 is axially mounted in the key groove 104 opened on the movable cavity 103. Its first end abuts against the second end of the active push rod 302 and has a plurality of second water drop ball channels 3011 that match the first water drop ball channel.

[0071] The first transmission ball 309, in number several, has its rolling limit located in the upper water drop ball channel formed by the combination of the first water drop ball channel and the second water drop ball channel 3071. The upper water drop ball channel is set at an upward slope along the rotation direction of the active push rod 302.

[0072] The compression spring 305 is disposed in the movable cavity 103, and its first end abuts against the second end of the driven push rod 301, and its second end is limited to abut against the screw cap 306. The screw cap 306 is threadedly assembled with the movable cavity 103.

[0073] The brake lever 307 is fitted to the second end of the driven push rod 301. In this embodiment, the brake lever 307 is threadedly fitted to the second end of the driven push rod 301 to adjust the length of the brake lever 307 extending out of the screw cap 306, and its free end extends out of the screw cap 306 and has a pressing part 3071 that abuts against the first brake unit 501.

[0074] In the above embodiment, during braking, the pull rod 20 rotates when pulled by the pull line. The active push rod 302 rotates counterclockwise in the movable cavity under the pull of the pull rod 20, driving the first transmission ball 309 to roll in the upper water droplet track. Since the upper water droplet track is set at an upward slope along the rotation direction of the active push rod 302, when the position of the first water droplet track and the first transmission ball 309 changes, the rolling of the first transmission ball 309 will also change its position along the second water droplet track 3011. The combination of the two causes the driven push rod 301 and the brake rod 307 to be displaced downward, which in turn causes the first braking unit 501 to move downward to brake the brake disc. When the force ends, the vertical compression restoring force of the compression spring 305 pushes the driven push rod 301 to return to its original position upward. The first transmission ball 309 rolls in the opposite direction, causing the active push rod 302 and the pull rod 20 to return to their original positions simultaneously, ensuring the stable driving of the drive member 30 and the pull rod 20.

[0075] In summary, the self-friction-assisted braking structure provided in this embodiment of the present invention, through the setting of the self-friction assisting component 40, allows the driving component 30 to push the first braking unit 501 to move, thereby pressing the brake disc 70 and causing it to deform. The deformed brake disc 70 shifts towards and contacts the second braking unit 502. The friction between the brake disc 70 and the second braking unit 502 causes the slider component 401 to slide and rise along the movement direction of the brake disc 70 under the limitation of the slider component 402, thereby pushing and resisting the disc 70 in the opposite direction, completing the brake assisting force application process. The self-friction assisting component 40 automatically works when the brake disc 70 is deformed, generating a reverse thrust on the brake disc relative to the first braking unit 501, effectively correcting the deformation of the brake disc 70, reducing braking force loss, and increasing the service life of the brake disc 70. At the same time, it makes the friction surface between the brake disc 70 and the two braking units more ideal, resulting in greater braking force output.

[0076] Example 2

[0077] Embodiment 2 of this utility model provides a cable disc brake, which includes the self-friction assisted braking structure proposed in the first aspect above. The second end of the pull rod 20 of the cable disc brake is provided with a cable clamping plate 201 and a guide part 203. The cable clamping plate 201 is assembled to the second end of the pull rod 20 by a cable clamping screw 202 to fix the first end of the pull cable. The second end of the pull cable changes the cable routing direction through the guide part 203 and passes through a cable threading pin 60 and connects to the brake lever. The cable threading pin 60 is assembled on the base 106 formed on the outside of the first clamp body 101.

[0078] Other undescribed structures are described in Example 1.

[0079] In summary, the self-friction-assisted braking structure and cable disc brake provided by this utility model embodiment have a self-friction-assisted component 40 that automatically works when the brake disc 70 is deformed, generating a reverse thrust on the brake disc relative to the first braking unit 501. This effectively corrects the deformation of the brake disc 70, reduces braking force loss, and increases the service life of the brake disc 70. At the same time, it makes the friction surfaces between the brake disc 70 and the two braking units more ideal, resulting in greater braking force output.

[0080] Meanwhile, it is understandable that since there is an efficiency loss in the axial thrust added to the drive member 30, and the reverse thrust of the self-friction booster 40 on the brake disc 70 will only affect the working state of the drive member 30 when it is much greater than the pressure applied to the brake disc 70 by the first braking unit 501, the brake caliper 10 with the added self-friction booster 40 will have a greater braking force.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A self-friction-assisted braking structure, configured in conjunction with a brake caliper, the brake caliper being composed of a first caliper and a second caliper, and having a brake cavity with one open side in its middle, the brake cavity containing a braking element, characterized in that, The braking component has a first braking unit and a second braking unit. The first clamp body is provided with a drive member for pushing the first braking unit to displace and press against the brake disc. It also includes: The first end of the pull rod is rotatably assembled with the upper end of the first clamp body and connected to the drive end of the drive component; The self-friction assist component is disposed in the second clamp body and is used to lift the second braking unit to cooperate with the first braking unit in clamping and braking the brake disc when the first braking unit compresses the brake disc and deforms it and contacts the second braking unit.

2. The self-friction-assisted braking structure as described in claim 1, characterized in that, The braking component includes: The first braking unit includes a first brake pad back plate and a first brake pad, wherein the first brake pad back plate is disposed in a first groove opened in the braking cavity to limit rotation. The second braking unit is symmetrically arranged with the first braking unit and includes a second brake pad back plate and a second brake pad. The second brake pad back plate is embedded in the first end of the self-friction assist member to limit rotation. The guide pin is inserted into and fitted with the first brake pad back plate and the second brake pad back plate and fixed on the brake caliper body, so as to position the first brake pad back plate and the second brake pad back plate in the brake cavity and not interfere with the movement of the lever.

3. The self-friction-assisted braking structure as described in claim 2, characterized in that, The self-friction booster includes: The slider has a second groove at its first end that matches the second brake pad backing plate for embedded assembly, a first pin groove, and a first assembly groove that connects to the first pin groove and extends to the second end of the slider. The second end of the slider has a plurality of third teardrop-shaped channels that extend along the direction of movement of the brake disc. The slide block is fixedly assembled to the second clamp body by a number of screws, and its first end has a sliding surface that matches the slider and limits the slider to slide in the direction of movement of the brake disc. The sliding surface is provided with a number of fourth water drop ball tracks that match the third water drop ball track, and its second end is provided with a second pin groove and a second assembly groove that connects to the second pin groove and extends to the first end of the slide block. The second transmission ball, in number several, has its rolling limit located within the lower water drop ball channel formed by the combination of the third and fourth water drop ball channels. The lower water drop ball channel is arranged at an upward slope along the sliding direction of the slider. A tension spring, which is inclinedly disposed in the first assembly slot and the second assembly slot; There are two pins, which are respectively fitted into the first pin groove and the second pin groove and connected to the two ends of the tension spring.

4. The self-friction-assisted braking structure as described in claim 1, characterized in that, The driving component includes: An active push rod rotates axially within a movable cavity in the middle of the first clamp body, and its first end is fixedly assembled with the first end of the pull rod by a pull rod screw, and its second end has a plurality of first water droplet ball channels arranged in a ring array. The driven push rod is non-rotationally limited to the movable cavity, and its first end abuts against the second end of the active push rod and has a plurality of second water drop ball channels that match the first water drop ball channel. The first transmission ball, in number several, has its rolling limit located within the upper water drop ball track formed by the combination of the first water drop ball track and the second water drop ball track. The upper water drop ball track is set at an upward slope along the rotation direction of the active push rod. A compression spring is disposed in the movable cavity, with its first end abutting against the second end of the driven push rod, and its second end abutting against the screw cap, the screw cap being threadedly assembled with the movable cavity; A brake lever is fitted to the second end of the driven push rod, and its free end extends out of the screw cap and has a pressing portion that abuts against the first brake unit.

5. The self-friction-assisted braking structure as described in claim 4, characterized in that, An assembly step is formed on the annular sidewall of the active push rod. A plane bearing and an upper pad are sequentially fitted on the assembly step, and the movable surface of the plane bearing contacts the assembly step and the upper pad respectively.

6. The self-friction-assisted braking structure as described in claim 4, characterized in that, The brake lever is threadedly fitted to the second end of the driven push rod to adjust the length of the brake lever extending out of the screw cap.

7. The self-friction-assisted braking structure as described in claim 3, characterized in that, A buffer pad is installed on the side of the slider that is opposite to the direction of movement of the brake disc.

8. The self-friction-assisted braking structure as described in claim 2, characterized in that, The braking component also includes: At least two strong magnets are respectively disposed on opposite sides of the first brake pad back plate and the second brake pad back plate to magnetically connect the braking component and the self-friction booster component.

9. A cable-operated disc brake, characterized in that, It includes the self-friction-assisted braking structure as described in any one of claims 1-8.

10. The cable disc brake as described in claim 9, characterized in that: The second end of the pull rod is provided with a wire pressing plate and a guide part. The wire pressing plate is assembled to the second end of the pull rod by a wire pressing screw to fix the first end of the pull wire. The second end of the pull wire changes the direction of the wire through the guide part and passes through a wire threading pin and connects to the brake lever. The wire threading pin is assembled on the base formed on the outside of the first clamp body.

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