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

Abstract

The invention 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] The present invention relates to the technical field of two-wheeled vehicle accessories, and particularly relates to a self-friction assisted braking structure and a cable-operated disc brake. Background Art

[0002] There are currently two control transmission methods for disc brakes, namely cable-operated disc brakes and hydraulic disc brakes. The cost of hydraulic disc brakes is relatively high, so they are mostly installed on high-end bicycles or professional racing bikes. Compared with hydraulic disc brakes, cable-operated disc brakes have a simple structure and a lower cost. Due to the production cost of bicycles, cable-operated disc brakes are still widely installed and used on bicycles.

[0003] The first brake pad of a traditional disc brake is movably connected to the brake caliper body and is connected to a pull rod, while the second brake pad is fixedly connected to the brake caliper body. During initial braking, the first brake pad moves relative to the brake caliper body and contacts the disc, and the second brake pad does not contact the disc. During continuous braking, the first brake pad compresses the disc brake to deform (i.e., the part of the disc brake in contact with the first brake pad bends towards the side of the second brake pad relative to other parts) to contact the second brake pad, thereby achieving braking.

[0004] However, in the above solution, the contact area between the deformed disc and the first brake pad and the second brake pad during braking is small, resulting in large braking force loss, and the service life of the disc that is deformed for a long time will also be correspondingly shortened. Therefore, there is an urgent need in the market for a cable-operated disc brake that can correct the deformation of the brake disc during braking and reduce the braking force loss. Summary of the Invention

[0005] The present application provides a self-friction assisted braking structure and a cable-operated disc brake, which reduce the compression deformation of the disc brake compared with the existing traditional mechanical disc brakes, have a larger contact area between the disc and the first brake pad and the second brake pad during braking, and have a better braking effect.

[0006] In a first aspect, the present application provides a self-friction assisted braking structure, which is arranged in cooperation with a brake caliper body. The brake caliper body is composed of a first caliper body and a second caliper body, and a braking cavity with an open side is provided in the middle thereof. A braking member is arranged in the braking cavity. The braking member has a first braking unit and a second braking unit. A driving member for pushing the first braking unit to displace to press the brake disc is arranged in the first caliper body, and further includes:

[0007] A pull rod, the first end of which is rotatably assembled with the upper end of the first caliper body and is connected to the driving end of the driving member;

[0008] A self-friction assisting member, which is arranged in the second caliper body and is used for lifting the second braking unit to cooperate with the first braking unit to clamp and brake the brake disc when the first braking unit presses the brake disc to deform and contact the second braking unit.

[0009] Optionally, the brake member includes:

[0010] A first brake unit, 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 opened in the brake cavity for limited rotation;

[0011] A second brake unit, which is symmetrically arranged with the first brake unit and includes a second brake pad back plate and a second brake pad, and the second brake pad back plate is embedded at the first end of the self-friction assist member for limited rotation;

[0012] A guide pin, which is inserted and assembled with the first brake pad back plate and the second brake pad back plate and fixed on the brake caliper body to position the first brake pad back plate and the second brake pad back plate in the brake cavity without interfering with the movement of the pull rod.

[0013] Optionally, the self-friction assist member includes:

[0014] A slider member, a second groove for fitting and embedding the second brake pad back plate, a first pin groove, and a first assembly groove communicating with the first pin groove and penetrating to the second end of the slider member are opened at its first end, and a plurality of third water-drop ball tracks extending along the movement direction of the brake disc are opened at its second end;

[0015] A slide seat member, which is fixedly assembled on the second caliper body by a plurality of screws, and a sliding surface for cooperating with the slider member and limiting the slider member to slide in the movement direction of the brake disc is provided at its first end. A plurality of fourth water-drop ball tracks matching the third water-drop ball tracks are opened on the sliding surface, and a second pin groove and a second assembly groove communicating with the second pin groove and penetrating to the first end of the slide seat member are opened at its second end;

[0016] A plurality of second transmission balls, which are rollingly limited in a lower water-drop ball track formed by the combination of the third water-drop ball track and the fourth water-drop ball track, and the lower water-drop ball track is arranged in an inclined uphill along the sliding direction of the slider member;

[0017] A tension spring, which is inclined and arranged in the first assembly groove and the second assembly groove;

[0018] Two pin posts, which are respectively limited and assembled in the first pin groove and the second pin groove and connect the two ends of the tension spring.

[0019] Optionally, the driving member includes:

[0020] An active push rod, which axially rotates in an active cavity opened in the middle of the first clamp body, and whose first end is fixedly assembled with the first end of the pull rod through a pull rod screw, and whose second end has a plurality of first water drop ball tracks distributed in a ring array;

[0021] A driven push rod, which is non-rotatably limitedly assembled with the active cavity, and whose first end abuts against the second end of the active push rod and has a plurality of second water drop ball paths that match and correspond to the first water drop ball paths;

[0022] There are a plurality of first transmission balls, whose rolling limit is located in an upper water drop ball track formed by the combination of the first water drop ball track and the second water drop ball track, and the upper water drop ball track is arranged obliquely uphill along the rotation direction of the active push rod;

[0023] A compression spring member is disposed in the movable cavity, and a first end of the compression spring member abuts against a second end of the driven push rod, and a second end of the compression spring member abuts against a screw cover in a limited manner, and the screw cover is threadedly assembled with the movable cavity;

[0024] A brake rod is assembled on the second end of the driven push rod, and a free end of the brake rod extends out of the screw cover and has a pressing portion abutting against the first brake unit.

[0025] Optionally, an assembly step is formed on the annular side wall of the active push rod, and a plane bearing and an upper pad are sequentially sleeved on the assembly step, and the movable surface of the plane bearing contacts the assembly step and the upper pad respectively.

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

[0027] Optionally, a buffer pad is installed on the side of the sliding block away from the movement direction of the brake disc.

[0028] Optionally, the brake member further comprises:

[0029] Strong magnets, at least two in number, are disposed on opposite sides of the first brake pad back plate and the second brake pad back plate to magnetically connect the brake member and the self-friction assist member, respectively.

[0030] In a second aspect, the present application provides a cable-operated 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, and the wire pressing plate is assembled to the second end of the pull rod through a wire pressing screw to fix the first end of the pull wire, and the second end of the pull wire changes the routing direction through the guide portion and passes through a threading pin and is connected to the brake handle, and the threading pin is assembled on a base formed on the outside of the first caliper body.

[0032] Compared with the related art, the self-friction assist braking structure and cable disc brake provided by the present application have at least the following technical effects:

[0033] Through the setting of the self-friction assist member, the driving member pushes the first braking unit to displace to press the braking disc and cause the braking disc to deform. The deformed braking disc deflects and contacts the second braking unit. The frictional force between the braking disc and the second braking unit drives the slider member to slide along the movement direction of the braking disc under the limit of the sliding seat member and lift to reversely push against the braking disc, completing the braking assist boosting process; the self-friction assist member automatically operates when the braking disc deforms and triggers, generating a reverse thrust on the braking disc relative to the first braking unit, effectively correcting the deformation of the braking disc, reducing the loss of braking force, increasing the service life of the disc, and at the same time making the friction surfaces of the braking disc and the two braking units more ideal, obtaining a greater braking force output.

[0034] The details of one or more embodiments of the present application are set forth in the following drawings and description, so that the other features, objects, and advantages of the present application will become more clearly understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

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

[0037] Figure 2 is another three-dimensional structure diagram of a cable disc brake with a self-friction assist braking structure shown according to an exemplary embodiment.

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

[0039] Figure 4 is a vertical cross-sectional view of the self-friction assist braking structure shown according to an exemplary embodiment.

[0040] Figure 5 is a three-dimensional structure diagram of the active ejector rod shown according to an exemplary embodiment.

[0041] Description of reference numerals: brake caliper body 10; first caliper body 101; second caliper body 102; movable cavity 103; keyway groove 104; assembly wing 105; base 106; limit groove 107; caliper bolt 108;

[0042] Pull rod 20; wire pressing plate 201; wire pressing screw 202; guiding part 203;

[0043] Driving part 30; driven ejector rod 301; second water droplet raceway 3011; positioning key 3012; driving ejector rod 302; assembly step 3021; plain bearing 303; upper backing plate 304; compression spring part 305; screw cap 306; brake rod 307; pressing part 3071; pull rod screw 308; first transmission ball 309;

[0044] Self-friction assist part 40; slider part 401; second groove body 4011; sliding seat part 402; first assembly groove 403; first pin groove 404; pin column 405; tension spring 406; buffer cushion block 407; second assembly groove 408; fourth water droplet raceway 409; third water droplet raceway 410; second transmission ball 411;

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

[0046] Next, the technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It 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 should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and 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 situations.

[0049] In the related art, the first brake pad of the traditional disc brake is movably connected to the brake caliper body and connected to the pull rod, while the second brake pad is fixedly connected to the brake caliper body. During the initial braking, the first brake pad moves relative to the brake caliper body and contacts the disc, and the second brake pad does not contact the disc; during continuous braking, the first brake pad presses the disc brake to deform (that is, the part of the disc brake in contact with the first brake pad bends towards the side of the second brake pad relative to other parts) to contact the second brake pad, thereby achieving braking. However, in the above solution, the contact areas between the deformed disc and the first brake pad and the second brake pad are small, the loss of braking force is large, and the service life of the deformed disc will also be correspondingly shortened.

[0050] Based on the above situation, the embodiments of the present invention provide a self-friction assist brake structure and a cable-operated disc brake, which will be elaborated in detail below with reference to specific embodiments and drawings.

[0051] Embodiment 1

[0052] Embodiment 1 of the present invention provides a self-friction assist brake structure. Figure 1 One of the three-dimensional structure diagrams of the cable-operated disc brake with a self-friction assist brake structure shown according to an exemplary embodiment. Figure 2 Another three-dimensional structure diagram of the cable-operated disc brake with a self-friction assist brake structure shown according to an exemplary embodiment. Figure 3 The exploded view of the structure of the cable-operated disc brake with a self-friction assist brake structure shown according to an exemplary embodiment. As Figures 1-3 shown, this self-friction assist brake structure is configured in cooperation with a brake caliper body 10. The brake caliper body 10 is composed of a first caliper body 101 and a second caliper body 102, and a brake cavity with an open side is provided in the middle thereof. A brake member 50 is provided in the brake cavity. A driving member 40 for pushing the brake member 50 to displace for clamping the brake disc is provided in the first caliper body 10. Specifically, the first caliper body 101 and the second caliper body 102 are fixed by a plurality of caliper bolts 108, and an assembly wing 105 is integrally formed on the first caliper body 101 for cooperating with bolt assembly to realize the installation of the brake caliper body 10 on the vehicle frame;

[0053] Continue to refer to the attached Figures 1-3, a braking member 50 is provided in the braking cavity. In this embodiment, the braking member 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 cavity for limited rotation; a second braking unit 502, which is symmetrically disposed with the first braking unit 501, and includes a second brake pad back plate and a second brake pad, and the second brake pad back plate is embedded at the first end of the self-friction assist member 40 for limited rotation; a guide pin 503, which is inserted 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 cavity without interfering with the movement of the pull rod 20; a strong magnet 504, the number of which is at least two, and are respectively disposed on the opposite sides of one brake pad back plate and the second brake pad back plate to magnetically connect the braking member 50 and the self-friction assist member 40 respectively;

[0054] A driving member 30 for pushing the first braking unit 501 to displace to press the brake disc 70 is provided in the first caliper body 101, and further includes:

[0055] A pull rod 20, the first end of which is rotatably assembled with the upper end of the first caliper body 101 and is connected to the driving end of the driving member 30;

[0056] A self-friction assist member 40, which is disposed in the second caliper body 102 and is used for lifting 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 contacts the second braking unit 502.

[0057] In this embodiment, Figure 4 is a vertical cross-sectional view of a self-friction assist braking structure shown according to an exemplary embodiment. Continuing to refer to the appendix Figures 1-4 , the self-friction assist member 40 includes:

[0058] A slider member 401, a second groove 4011 for mating with the second brake pad back plate to be embedded and assembled, a first pin slot 404, and a first assembly slot 403 communicating with the first pin slot 404 and penetrating to the second end of the slider member 401 are opened at the first end thereof, and a plurality of third water droplet channels 410 extending along the movement direction of the brake disc 70 are opened at the second end thereof;

[0059] A slide seat member 402, which is fixedly assembled on the second caliper body 102 by a plurality of screws 4021, and a sliding surface for cooperating with the slider member 401 and limiting the slider member 401 to slide in the movement direction of the brake disc 70 is provided at the first end thereof. A plurality of fourth water droplet channels 409 matching and corresponding to the third water droplet channels 410 are opened on the sliding surface, and a second pin slot and a second assembly slot 408 communicating with the second pin slot and penetrating to the first end of the slide seat member 402 are opened at the second end thereof;

[0060] The second transmission balls 411, with a number of them, are limited in rolling within the lower water-drop ball track formed by the combination of the third water-drop ball track 410 and the fourth water-drop ball track 409, and the lower water-drop ball track is arranged as an inclined uphill along the sliding direction of the slider member 401;

[0061] The tension spring 406 is inclined and arranged within the first assembly groove 403 and the second assembly groove 408;

[0062] There are two pin columns 405, which are respectively limited and assembled within the first pin groove 404 and the second pin groove and are connected to both ends of the tension spring 406.

[0063] In the technical solution of the above embodiment, when the pull rod 20 rotates, it drives the driving end of the driving member 30, and then pushes the first braking unit 501 to displace to press the braking disc 70 and cause the braking disc 70 to deform. The deformed braking disc 70 deflects towards the second braking unit 502 and contacts the second braking unit 502;

[0064] At this time, the braking disc 70 is still in the state of rotating with the wheel. The frictional force between the braking disc 70 and the second braking unit 502 will drive the slider member 401 to slide along the moving direction of the braking disc 70 under the limitation of the slide seat member 402. Since the lower water-drop ball track is arranged as an inclined uphill along the sliding direction of the slider member 401, during the process of the frictional force driving the slider 401 to move along the moving direction of the braking disc 70, the second transmission balls 411 gradually move uphill, pushing the slider 401 and the second braking unit 502 to be lifted in the direction opposite to the moving direction relative to the first braking unit 501 and gradually pressing towards the braking disc 70, pushing against the braking disc 70 in the reverse direction, cooperating with the first braking unit 501 to clamp and brake the braking disc 70, completing the working process of brake auxiliary boosting. The self-frictional boosting member 40 automatically works when the braking disc 70 deforms and triggers, generating a reverse thrust on the braking disc relative to the first braking unit 501, effectively correcting the deformation of the braking disc 70, reducing the loss of braking force, and increasing the service life of the braking disc 70. At the same time, the friction surfaces of the braking disc 70 with the two braking units are more ideal, obtaining a greater braking force output;

[0065] Meanwhile, it can be understood that due to the efficiency loss of the additional axial thrust on the driving member 30, and the reverse thrust of the self-frictional boosting member 40 on the braking disc 70 will only affect the working state of the driving member 30 in the reverse direction when it is much greater than the pressure applied by the first braking unit 501 on the braking disc 70, so the brake caliper 10 with the additional self-frictional boosting member 40 will have a greater braking force.

[0066] Furthermore, when braking is completed, the driving member 30 is reset, the first brake unit 501 is disengaged from the brake disc 70, the brake disc 70 is deformed and restored, and the friction force with the second brake unit 502 decreases rapidly. At this time, the tension spring 406 drives the slider member 401 to reset and descend in the opposite direction, and the second brake unit 502 is disengaged from the brake disc 70.

[0067] In this embodiment, continue to refer to the attached Figure 3 A buffer block 407 is installed on the side of the slider member 401 that is away from the movement direction of the brake disc 70 to prevent the tension spring 406 from driving the slider member 401 to return too quickly and collide with the second caliper body 102 to produce an abnormal sound.

[0068] In this embodiment, Figure 5 FIG. 1 is a schematic diagram of a three-dimensional structure of an active ejector according to an exemplary embodiment. Figures 1-5 , the driving member 30 comprises:

[0069] The active push rod 302 is axially rotated in the movable cavity 103 opened 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 through a pull rod screw 308, and its second end has a plurality of first water drop ball paths distributed in a circular array; further, an assembly step 3021 is formed on the annular side wall of the active push rod 302, and a plane bearing 303 and an upper pad 304 are sequentially sleeved on the assembly step 3021, and 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-rotatably limitedly assembled with the active cavity 103. Specifically, the driven push rod 301 has at least one positioning key 3012 in the circumference, and the positioning key 3012 is axially assembled in the key slot 104 opened on the active cavity 103, and the first end of the driven push rod 301 abuts against the second end of the active push rod 302 and has a plurality of second water drop ball paths 3011 that match and correspond to the first water drop ball paths;

[0071] There are several first transmission balls 309, and their rolling limit is located in an upper water drop ball path formed by the combination of the first water drop ball path and the second water drop ball path 3071. The upper water drop ball path is arranged obliquely uphill along the rotation direction of the active push rod 302;

[0072] A compression spring 305 is disposed in the active cavity 103, and a first end of the compression spring 305 abuts against a second end of the driven push rod 301, and a second end of the compression spring 305 abuts against a screw cover 306, and the screw cover 306 is threadedly assembled with the active cavity 103;

[0073] The brake lever 307 is assembled to the second end of the driven ejector rod 301. In this embodiment, the brake lever 307 is threadedly assembled with the second end of the driven ejector rod 301 to adjust the length of the brake lever 307 extending out of the gland 306, and its free end extends out of the gland 306 and has a pressing portion 3071 that abuts against the first braking unit 501.

[0074] In the technical solution of the above embodiment, during braking, when the pull rod 20 is pulled by the wire, it rotates. The driving ejector rod 302 is pulled by the pull rod 20 and rotates counterclockwise in the moving cavity, driving the first transmission ball 309 to roll in the upper water droplet raceway. Since the upper water droplet raceway is arranged as an inclined uphill along the rotation direction of the driving ejector rod 302, when the first water droplet raceway and the first transmission ball 309 change positions, and the rolling of the first transmission ball 309 also changes positions along the second water droplet raceway 3011. The two are combined to press the driven ejector rod 301 and the brake lever 307 to displace downward together, pressing the first braking unit 501 to move downward to brake the brake disc; when the force application ends, the vertical compression restoring force of the compression spring member 305 pushes the driven ejector rod 301 to reset upward, and the reverse rolling of the first transmission ball 309 drives the driving ejector rod 302 and the pull rod 20 to reset simultaneously, ensuring the stable driving of the driving member 30 and the pull rod 20.

[0075] In summary, the self-friction assist braking structure provided by the embodiment of the present invention, through the setting of the self-friction assist member 40, the driving member 30 pushes the first braking unit 501 to displace to press the brake disc 70 and cause the brake disc 70 to deform. The deformed brake disc 70 deflects towards the second braking unit 502 and contacts the second braking unit 502. The frictional force between the brake disc 70 and the second braking unit 502 drives the slider member 401 to slide along the movement direction of the brake disc 70 under the limitation of the sliding seat member 402 and lift to reversely push against the brake disc 70, completing the brake assist boosting working process; the self-friction assist member 40 automatically works when the brake disc 70 deforms and triggers, 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 the loss of braking force, and increasing the service life of the brake disc 70. At the same time, the friction surfaces of the brake disc 70 with the two braking units are more ideal, obtaining a greater braking force output.

[0076] Embodiment 2

[0077] The embodiment 2 of the present invention provides a wire-pull disc brake, which includes the self-friction assist braking structure proposed in the above first aspect. And a wire pressing plate 201 and a guiding portion 203 are provided at the second end of the pull rod 20 of the wire-pull disc brake. The wire pressing plate 201 is assembled to the second end of the pull rod 20 through a wire pressing screw 202 to fix the first end of the wire. The second end of the wire changes the routing direction through the guiding portion 203 and passes through a wire threading pin 60 and is connected to the brake handle. The wire threading pin 60 is assembled on a base 106 formed outside the first clamp body 101.

[0078] For other structures not described, refer to Embodiment 1.

[0079] In summary, the self-friction assist brake structure and cable disc brake provided by the embodiments of the present invention. When the deformation of the brake disc 70 is triggered, the self-friction assist member 40 automatically operates to generate a reverse thrust on the brake disc relative to the first braking unit 501, effectively correcting the deformation of the brake disc 70, reducing the loss of braking force, and increasing the service life of the brake disc 70. At the same time, the friction surfaces of the brake disc 70 with the two braking units are more ideal, obtaining a greater braking force output.

[0080] At the same time, it can be understood that due to the efficiency loss caused by the additional axial thrust on the driving member 30, and the reverse thrust of the self-friction assist member 40 on the brake disc 70 will only reversely affect the working state of the driving member 30 when it is much greater than the pressure exerted by the first braking unit 501 on the brake disc 70. Therefore, the brake caliper 10 with the self-friction assist member 40 will have a greater braking force.

[0081] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0082] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A self-friction assist braking structure is provided in cooperation with a brake caliper body. The brake caliper body is composed of a first caliper body and a second caliper body, and a braking cavity with an open side is formed in the middle thereof. A braking member is arranged in the braking cavity, and it is characterized in that, The braking member has a first braking unit and a second braking unit. A driving member for pushing the first braking unit to displace and press the braking disc is arranged in the first caliper body. The braking member further includes: A pull rod, the first end of which is rotatably assembled with the upper end of the first caliper body and is connected to the driving end of the driving member; A self-friction boosting member, which is arranged in the second caliper body and is used for lifting the second braking unit to cooperate with the first braking unit to clamp and brake the braking disc when the first braking unit presses the braking disc to deform and contact the second braking unit.

2. The self-friction assist braking structure according to claim 1, wherein The braking member includes: A first braking unit, which includes a first brake pad back plate and a first brake pad, and the first brake pad back plate is arranged in a first groove body opened in the braking cavity for limited rotation; A second braking unit, which 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 at the first end of the self-friction boosting member for limited rotation; A guide pin, which is inserted and assembled with the first brake pad back plate and the second brake pad back plate and is fixed on the brake caliper body to position the first brake pad back plate and the second brake pad back plate in the braking cavity without interfering with the movement of the pull rod.

3. The self-friction assist braking structure according to claim 2, wherein The self-friction boosting member includes: A slider member, a second groove body matching the embedding and assembly of the second brake pad back plate, a first pin groove, and a first assembly groove communicating with the first pin groove and penetrating to the second end of the slider member are opened at the first end of the slider member, and a plurality of third water-drop ball tracks extending along the movement direction of the braking disc are opened at the second end of the slider member; A sliding seat member, which is fixedly assembled on the second caliper body by a plurality of screws, and a sliding surface matching the setting of the slider member and limiting the slider member to slide in the movement direction of the braking disc is arranged at the first end of the sliding seat member. A plurality of fourth water-drop ball tracks matching the third water-drop ball tracks are opened on the sliding surface, and a second pin groove and a second assembly groove communicating with the second pin groove and penetrating to the first end of the sliding seat member are opened at the second end of the sliding seat member; A plurality of second transmission balls, which are limited to roll in a lower water-drop ball track formed by the combination of the third water-drop ball track and the fourth water-drop ball track. The lower water-drop ball track is arranged in an inclined uphill along the sliding direction of the slider member; A tension spring, which is inclined and arranged in the first assembly groove and the second assembly groove; Two pin posts, which are respectively limited and assembled in the first pin groove and the second pin groove and connect the two ends of the tension spring.

4. The self-friction assist braking structure according to claim 1, characterized in that, The driving member includes: A driving ejector rod, which axially rotates in a movable cavity opened in the middle of the first caliper body, and the first end of the driving ejector rod is fixedly assembled with the first end of the pull rod through a pull rod screw. A plurality of first water-drop ball tracks are arranged at the second end of the driving ejector rod in an annular array; A driven ejector rod, which is non-rotatably limitedly assembled with the movable cavity, and the first end of the driven ejector rod abuts against the second end of the driving ejector rod and has a plurality of second water-drop ball tracks matching the first water-drop ball tracks; There are a plurality of first transmission balls, whose rolling limit is located in an upper water drop ball track formed by the combination of the first water drop ball track and the second water drop ball track, and the upper water drop ball track is arranged obliquely uphill along the rotation direction of the active push rod; A compression spring member is disposed in the movable cavity, and a first end of the compression spring member abuts against a second end of the driven push rod, and a second end of the compression spring member abuts against a screw cover in a limited manner, and the screw cover is threadedly assembled with the movable cavity; A brake rod is assembled on the second end of the driven push rod, and a free end of the brake rod extends out of the screw cover and has a pressing portion abutting against the first brake unit.

5. The self-friction assist braking structure according to claim 4, wherein An assembly step is formed on the annular side wall of the active ejector rod, and a plane bearing and an upper pad are sequentially sleeved 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 assist braking structure according to claim 4, wherein The brake rod is threadably assembled with the second end of the driven push rod to adjust the length of the brake rod extending out of the screw cap.

7. The self-friction assist braking structure according to claim 3, wherein A buffer pad is installed on the side of the sliding block away from the moving direction of the brake disc.

8. The self-friction assist braking structure according to claim 2, wherein, The brake member also includes: Strong magnets, at least two in number, are disposed on opposite sides of the first brake pad back plate and the second brake pad back plate to magnetically connect the brake member and the self-friction assist member, respectively.

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

10. The cable-operated disc brake according to claim 9, characterized in that: 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 through a wire pressing screw to fix the first end of the pull wire. The second end of the pull wire changes its routing direction through the guide portion and passes through a threading pin and is connected to the brake handle. The threading pin is assembled on a base formed on the outside of the first caliper body.

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