A disc brake pad assembly and method for use with a disc brake

Abstract

The present application relates to disc brake pad mounting technical field, the present application discloses a kind of disc brake pad assembly and method for disc brake lock, including hub, the middle part of the hub is H type's stem structure, the left and right ends of the hub are both convex stem, and left and right ends minimum diameter, the present application is designed with the first disc brake structure cooperation with the two ends of hub, first disc brake pad can be quickly disassembled and assembled, without using screw multiple times, just need to rotate two adjusting bolts;Second disc brake pad can also be quickly disassembled and assembled by the cooperation of second disc brake structure, without rotating bolt or screw can be realized;Overall simple structure, it is convenient to quickly disassembled and assembled, and stable and reliable after installation, and install disc brake lock by the heat dissipation hole or heat dissipation groove on first disc brake pad.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of disc brake pad installation, in particular to a disc brake pad assembly and method for disc brake lock. BACKGROUND

[0002] The existing bicycle disc brake pad is installed on the hub, and the disc brake pad plane needs to be turned, 4-6 holes need to be drilled, and 6 M5 screws are used for installation and connection. In the maintenance and replacement disassembly, the disc brake pad can be removed only by disassembling multiple screws, which is very inconvenient. At the same time, the disc brake pad has multiple heat dissipation holes, and the disc brake lock can be installed through the heat dissipation holes to prevent the vehicle from being stolen. Therefore, the present application designs a disc brake pad assembly for disc brake lock. SUMMARY

[0003] The present application aims to provide a disc brake pad assembly and method for disc brake lock to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a disc brake pad assembly for disc brake lock, comprising a hub, the middle part of the hub is an H-shaped rod body structure, the left and right ends of the hub are convex rod bodies, and the left and right ends have the smallest diameter, two pairs of arc-shaped clamping grooves are equidistantly arranged on the outer side wall of one end of the convex rod body near the middle part of the left and right ends of the hub, and a first insertion hole is arranged on the left side wall along the middle part near the front and rear ends, the first insertion hole is located between one pair of arc-shaped clamping grooves, a first lock hole is through-arranged on the side wall of one end of the convex rod body and connected with the first insertion hole, the first lock hole is located between one pair of arc-shaped clamping grooves, the outer side wall of the convex rod body at the left and right ends of the hub is provided with a slant screw, nuts are rotatably connected to the two ends of the hub, the two ends of the hub are movably sleeved with a gasket, and a first disc brake structure is detachably installed on one end of the hub.

[0005] Preferably, the first disc brake structure comprises a first disc brake pad, a first sleeve, a pair of sleeve rods and a pair of limiting units; the first disc brake pad is a circular structure, and a first sleeve hole is formed in the middle part of the first disc brake pad and matches the arc-shaped slot; a plurality of heat dissipation holes are equidistantly formed on the outer ring of the first disc brake pad; a plurality of heat dissipation grooves are equidistantly formed near the heat dissipation holes; two pairs of second sleeve holes are equidistantly formed on the outer side of the first sleeve hole in the middle part of the first disc brake pad; a pair of symmetrical adjusting grooves are formed between the two sleeve holes; the first disc brake pad is detachably sleeved on one end of the hub and located at the arc-shaped clamping groove part; the first sleeve is a circular ring structure, and a first protrusion corresponding to the arc-shaped clamping groove is equidistantly arranged on the inner side wall; the first sleeve is movably sleeved on one end of the hub and located at the arc-shaped clamping groove part; the first sleeve is located on the right side of the disc brake pad and is attached to the middle side wall of the hub; the pair of sleeve rods are both cross-shaped structures, and the diameter of the middle part is greater than that of the two ends; the pair of sleeve rods are equidistantly fixedly arranged on the left side wall of the first sleeve, and the other ends are movably penetrated into one of the pair of second sleeve holes; the pair of limiting units are equidistantly fixedly arranged on the left side wall of the first sleeve, and are movably penetrated into the other two second sleeve holes.

[0006] Preferably, the limiting unit comprises a first clamping rod, a moving rod, a second clamping rod and an adjusting bolt; the first clamping rod is a T-shaped semicircular rod structure; one end of the first clamping rod is fixedly arranged on the left side wall of the first sleeve, and an adjusting threaded hole is formed at the other end of the first clamping rod; one end of the moving rod is fixedly arranged on the middle part of the side wall near the one end of the first clamping rod, and a moving groove is arranged on the other end of the moving rod; the second clamping rod has the same structure as the first clamping rod, and the length of the second clamping rod is less than that of the first clamping rod; a compensation groove is formed in the middle part of one end of the second clamping rod; a pin shaft is arranged in the middle part of the compensation groove; a countersunk hole corresponding to the adjusting threaded hole is formed at the other end of the second clamping rod; one end of the second clamping rod is movably sleeved on the other end of the moving rod, and the pin shaft is movably penetrated into the moving groove; one end of the adjusting bolt is movably embedded in the countersunk hole, and the other end of the adjusting bolt cannot be separated from the second clamping rod; the other end of the adjusting bolt is movably screwed into the adjusting threaded hole.

[0007] Preferably, the other ends of the first clamping rod and the second clamping rod are movably penetrated into the second sleeve hole of the first disc brake pad, and the second clamping rod and the first clamping rod are expanded and clamped and limited and fixed by rotating the bolt.

[0008] Preferably, the flower drum can also be installed with a second disc brake structure, wherein the second disc brake structure comprises a second disc brake pad, a pair of locking units and a second sleeve; the second disc brake pad is the same structure as the first disc brake pad, and is detachably sleeved on one end of the flower drum and located at the arc-shaped clamping groove part; a pair of the locking units are correspondingly and detachably arranged on the adjusting grooves of the second disc brake pad; the second sleeve is a circular ring structure, and a pair of lock rods corresponding to the first lock holes are symmetrically arranged on the side wall; the second sleeve is detachably sleeved on the threaded rod at one end of the flower drum and located at the left side of the arc-shaped clamping groove; and the lock rods are movably inserted into the first lock holes.

[0009] Preferably, the locking unit comprises a pair of lock seats, an assembly bolt and a lock plate; the pair of lock seats are convex structures, and are symmetrically arranged on the left and right sides of the second disc brake pad and located at the adjusting groove parts; one end of the pair of lock seats is movably inserted into the adjusting groove; the assembly bolt is movably screwed into the pair of lock seats and penetrates the adjusting groove; one end of the lock plate is fixedly arranged on the side wall of one of the lock seats and located at the right side of the second disc brake pad; and the other end of the lock plate is provided with a third sleeve hole in the middle part, and the other end of the lock plate is movably inserted into the first insertion hole and movably sleeved on the lock rod.

[0010] Preferably, the disc brake pad assembly for disc brake lock further comprises a baffle, which is attached to the left side of the first disc brake pad or the left side of the second sleeve.

[0011] A use method of a disc brake pad assembly for disc brake lock, comprising the following steps:

[0012] Step one: first, the first sleeve is sleeved at the arc-shaped clamping groove part of the flower drum;

[0013] Step two: then, the first disc brake pad is sleeved on the flower drum and sleeved on the two sleeve rods through the second sleeve hole for limiting;

[0014] Step three: at the same time, the second sleeve hole is sleeved on the first clamping rod and the second clamping rod in the limiting unit, and the adjusting bolt is rotated to make the second clamping rod and the other end of the first clamping rod relatively far away from each other, so that the first disc brake pad is clamped and limited to complete the installation;

[0015] Step four: finally, the gasket and the mounting nut are fixed on the vehicle beam frame.

[0016] The disc brake pad assembly and method for disc brake lock have the following beneficial effects:

[0017] 1. Through the design of the two ends of the flower drum, the first disc brake pad can be quickly disassembled and assembled in cooperation with the first disc brake structure, without the need for multiple screw installation, but only by rotating two adjusting bolts.

[0018] 2、The second disc brake structure can be matched to quickly disassemble and assemble the second disc brake piece, and the bolt or screw does not need to be rotated.

[0019] 3、The whole structure is simple, convenient to quickly disassemble and assemble, stable and reliable after installation, and the disc brake lock can be installed by means of the heat dissipation holes or heat dissipation grooves on the first disc brake piece. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a first assembly display structure diagram of the present application.

[0021] Figure 2 It is a first split structure diagram of the present application.

[0022] Figure 3 It is a second assembly display structure diagram of the present application. Figure 1

[0023] Figure 4 It is a second assembly display structure diagram of the present application. Figure 2

[0024] Figure 5 It is a second assembly display structure diagram of the present application. Figure 2

[0025] Figure 6 It is a second assembly display structure diagram of the present application.

[0026] Figure 7 It is a second assembly display structure diagram of the present application.

[0027] Figure 8 It is a second assembly display structure diagram of the present application.

[0028] Figure 9 It is a second assembly display structure diagram of the present application. Figure 7

[0029] Figure 10 It is a second assembly display structure diagram of the present application. Figure 8

[0030] In the figure: 1, flower drum; 2, arc-shaped clamping groove; 3, first lock hole; 4, first insertion hole; 5, nut; 6, blocking piece; 7, first disc brake structure; 71, first disc brake piece; 72, first sleeve; 73, sleeve rod; 74, limiting unit; 741, first clamping rod; 742, moving rod; 743, second clamping rod; 744, adjusting bolt; 75, heat dissipation hole; 76, heat dissipation groove; 77, adjusting groove; 8, second disc brake structure; 81, second disc brake piece; 82, locking unit; 821, lock seat; 822, assembly bolt; 823, lock plate; 83, second sleeve; 84, lock rod. DETAILED DESCRIPTION​​​​​

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0032] Please refer to Figures 1-10 The present application provides a technical solution: a disc brake pad assembly for disc brake, comprising a hub 1, the middle part of the hub 1 is an H-shaped rod body structure, the left and right ends of the hub 1 are convex rod bodies, and the diameters of the left and right ends are the smallest, two pairs of arc-shaped clamping grooves 2 are equidistantly formed on the outer side wall of one end of the convex rod body near the middle part of the left and right ends of the hub 1, and a first insertion hole 4 is formed on the left side wall near the middle part of the front and rear ends, the first insertion hole 4 is located between one pair of arc-shaped clamping grooves 2, a first lock hole 3 is formed through the side wall of one end of the convex rod body and is connected with the first insertion hole 4, and the first lock hole 3 is located between one pair of arc-shaped clamping grooves 2, the outer side wall of the convex rod body at the left and right ends of the hub 1 is provided with a slanting thread, a nut 5 is screwed on the left and right ends of the hub 1, the left and right ends of the hub 1 are movably sleeved on a gasket, and a first disc brake structure 7 is detachably mounted on one end of the hub 1.

[0033] As a preferred solution, further, the first disc brake structure 7 comprises a first disc brake pad 71, a first sleeve 72, a pair of sleeve rods 73 and a pair of limiting units 74; the first disc brake pad 71 is a circular structure, a first sleeve hole is formed in the middle part of the first disc brake pad 71 and matches the arc-shaped groove, a plurality of heat dissipation holes 75 are equidistantly formed on the outer ring of the first disc brake pad 71, a plurality of heat dissipation grooves 76 are equidistantly formed near the heat dissipation holes 75, two pairs of second sleeve holes are equidistantly formed on the outer side of the first sleeve hole in the middle part of the first disc brake pad 71, a pair of symmetrical adjusting grooves 77 are formed between the two sleeve holes, the first disc brake pad 71 is detachably sleeved on one end of the hub 1 and located at the arc-shaped clamping groove 2 part, the first sleeve 72 is a circular ring structure, a first protrusion corresponding to the arc-shaped clamping groove 2 is equidistantly arranged on the inner side wall of the first sleeve 72, the first sleeve 72 is movably sleeved on one end of the hub 1 and located at the arc-shaped clamping groove 2 part, the first sleeve 72 is located on the right side of the disc brake pad and adheres to the middle part of the side wall of the hub 1, the pair of sleeve rods 73 are cross-shaped structures, the middle part diameter of the pair of sleeve rods 73 is greater than the end diameter, the pair of sleeve rods 73 are equidistantly fixedly arranged on the left side wall of the first sleeve 72, and the other ends are movably penetrated into one pair of second sleeve holes respectively, and the pair of limiting units 74 are equidistantly fixedly arranged on the left side wall of the first sleeve 72 and movably penetrated into the other two second sleeve holes respectively.

[0034] As a preferred scheme, further, the limiting unit 74 comprises a first clamping rod 741, a moving rod 742, a second clamping rod 743 and an adjusting bolt 744; the first clamping rod 741 is a T-shaped semicircular rod body structure, one end of the first clamping rod 741 is fixedly arranged on the left side wall of the first sleeve 72, and the other end of the first clamping rod 741 penetrates through an adjusting threaded hole, one end of the moving rod 742 is fixedly arranged on the middle part of the side wall close to one end of the first clamping rod 741, and the other end of the moving rod 742 is provided with a moving groove in the middle part, the second clamping rod 743 is the same as the first clamping rod 741 in structure, and the length of the second clamping rod 743 is less than that of the first clamping rod 741, a compensation groove is formed in the middle part of one end of the second clamping rod 743, a pin shaft is arranged in the middle part of the compensation groove, and a countersunk hole corresponding to the adjusting threaded hole is formed in the other end of the second clamping rod 743, one end of the second clamping rod 743 is movably sleeved on the other end of the moving rod 742, the pin shaft movably penetrates through the moving groove, one end of the adjusting bolt 744 is movably embedded in the countersunk hole, and the other end of the adjusting bolt 744 cannot be separated from the second clamping rod 743, and the other end of the adjusting bolt 744 is movably screwed in the adjusting threaded hole.

[0035] As a preferred scheme, further, the other ends of the first clamping rod 741 and the second clamping rod 743 can movably penetrate through the second sleeve hole of the first disc brake piece 71, and the second clamping rod 743 and the first clamping rod 741 are expanded and clamped to be limited and fixed by rotating the bolt.

[0036] As a preferred scheme, further, the second disc brake structure 8 can also be installed on the hub 1, wherein the second disc brake structure 8 comprises a second disc brake piece 81, a pair of clamping units 82 and a second sleeve 83; the second disc brake piece 81 is the same as the first disc brake piece 71 in structure, the second disc brake piece 81 is detachably sleeved on one end of the hub 1 and located at the arc-shaped clamping groove 2, the pair of clamping units 82 are detachably arranged on the adjusting grooves 77 of the second disc brake piece 81 in correspondence, the second sleeve 83 is a circular ring structure, and a pair of lock rods 84 corresponding to the first lock hole 3 are symmetrically arranged on the side wall, the second sleeve 83 is detachably sleeved on the threaded rod at one end of the hub 1 and located at the left side of the arc-shaped clamping groove 2, the lock rod 84 can be movably inserted into the first lock hole 3 and penetrate through the first insertion hole 4.

[0037] As a preferred further, the locking unit 82 comprises a pair of lock seats 821, an assembly bolt 822 and a lock plate 823; the pair of lock seats 821 are convex structures, and are symmetrically arranged on the left and right sides of the second disc brake pad 81 and located at the adjusting groove 77; one end of the pair of lock seats 821 is movably inserted into the adjusting groove 77, the assembly bolt 822 is movably screwed into the pair of lock seats 821 and penetrates the adjusting groove 77, and one end of the lock plate 823 is fixedly arranged on the side wall of one of the lock seats 821 and located on the right side of the second disc brake pad 81; the other end of the lock plate 823 is movably inserted into the first insertion hole 4 and movably sleeved on the lock rod 84.

[0038] As a preferred further, the baffle 6 is attached to the left side of the first disc brake pad 71 or the left side of the second sleeve seat 83.

[0039] Embodiment one, according to the description attached Figures 1-5 It can be known that a method for using a disc brake pad assembly for a disc brake lock comprises the following steps:

[0040] Step (1), first, the first sleeve seat 72 is sleeved on the arc-shaped clamping groove 2 of the hub 1;

[0041] Step (2), then the first disc brake pad 71 is sleeved on the hub 1 and sleeved on the two sleeve rods 73 through the second sleeve hole;

[0042] Step (3), at the same time, the second sleeve hole is sleeved on the first clamping rod 741 and the second clamping rod 743 in the limiting unit 74, and the adjusting bolt 744 is rotated to make the second clamping rod 743 and the other end of the first clamping rod 741 relatively far away, and the one end of the second clamping rod 743 is slidably moved by the moving rod 742, so as to realize the left limiting of the first disc brake pad 71, and the right limiting of the first disc brake pad 71 is realized by cooperating with the sleeve rod 73, so as to realize the fixing and complete the installation of the clamping and limiting;

[0043] Step (4), finally, the gasket and the mounting nut 5 are fixed on the vehicle beam frame.

[0044] Embodiment two, according to the description attached Figures 6-10 It can be known that a method for using a disc brake pad assembly for a disc brake lock comprises the following steps:

[0045] Step (1), the lock seats 821 in the locking unit 82 are symmetrically arranged on both sides of the adjusting groove 77, and are connected and fixed by the assembly bolt 822;

[0046] Step (2), the second disc brake pad 81 is sleeved on the arc-shaped clamping groove 2 at the end of the hub 1, and the lock base 821 is slid to move the lock plate 823 to be inserted into the first insertion hole 4, thereby limiting the second disc brake pad 81;

[0047] Step (3), then the second sleeve base 83 is sleeved on the hub 1, the lock rod 84 is inserted into the first lock hole 3, and the lock plate 823 is locked again to pass through the first insertion hole 4, so that the lock plate 823 cannot be separated from the first insertion hole 4;

[0048] Step (4), finally, it is installed in the corresponding position, fixed by the nut 5 and the blocking piece 6, and limited to the second sleeve base 83, so that the second disc brake pad 81 can be quickly cooled by the heat dissipation hole 75 and the heat dissipation groove 76 during friction, and the disc brake lock can also be installed to prevent the vehicle from being stolen.

[0049] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A disc brake pad assembly that can be used in disc brake locks, characterized in that, The utility model provides a flower drum (1), the middle part of the flower drum (1) is H type's rod body structure, both ends of the flower drum (1) are convex rod bodies, and the diameter of both ends is minimum, two pairs of arc clamping slots (2) are equidistantly arranged on the outer side wall of one end of the convex rod body near the middle part of both ends of the flower drum (1), and a first jack (4) is arranged on the left side wall along the middle part near the front and back ends, the first jack (4) is located between one pair of arc clamping slots (2), a first lock hole (3) is through -going arranged on the side wall of one end of the convex rod body and is connected with the first jack (4), the first lock hole (3) is located between one pair of arc clamping slots (2), and the outer side wall of the convex rod body of both ends of the flower drum (1) is provided with inclined thread, nuts (5) are rotatably connected on both ends of the flower drum (1), both ends of the flower drum (1) are movably sleeved on the gasket, and a first disc brake structure (7) is detachably installed on one end of the flower drum (1); The first disc brake structure (7) comprises a first disc brake pad (71), a first sleeve (72), a pair of sleeve rods (73) and a pair of limiting units (74). The limiting unit (74) comprises a first clamping rod (741), a moving rod (742), a second clamping rod (743) and an adjusting bolt (744). The first clamping rod (741) is a T-shaped semicircular rod body structure, one end of the first clamping rod (741) is fixedly arranged on the left side wall of the first sleeve (72), and the other end of the first clamping rod (741) is provided with an adjusting threaded hole, one end of the moving rod (742) is fixedly arranged on the middle part of the side wall near one end of the first clamping rod (741), and the other end of the moving rod (742) is provided with a moving groove, the second clamping rod (743) is the same as the first clamping rod (741) in structure, and the length of the second clamping rod (743) is less than that of the first clamping rod (741), a compensation groove is formed in the middle part of one end of the second clamping rod (743), a pin shaft is arranged in the middle part of the compensation groove, and a countersunk hole corresponding to the adjusting threaded hole is formed in the other end of the second clamping rod (743), one end of the second clamping rod (743) is movably sleeved on the other end of the moving rod (742), and the pin shaft is movably penetrated in the moving groove, one end of the adjusting bolt (744) is movably embedded in the countersunk hole, and the other end of the adjusting bolt (744) cannot be separated from the second clamping rod (743), and the other end of the adjusting bolt (744) is movably and rotatably connected in the adjusting threaded hole. The other ends of the first clamping rod (741) and the second clamping rod (743) can be movably penetrated in the second sleeve hole of the first disc brake pad (71), and the second clamping rod (743) and the first clamping rod (741) are relatively far away from each other by rotating the bolt to expand and lock the limiting and fixing.

2. A disc brake pad assembly for use in a disc brake according to claim 1, wherein The first disc brake piece (71) is a circular structure, and a first sleeve hole is formed in the middle part and matched with the arc-shaped groove. A plurality of heat dissipation holes (75) are equidistantly formed on the outer ring close to the first disc brake piece (71), and a plurality of heat dissipation grooves (76) are equidistantly formed close to the heat dissipation holes (75). Two pairs of second sleeve holes are equidistantly formed in the middle part of the first disc brake piece (71) outside the first sleeve hole, and a pair of symmetrical adjusting grooves (77) are formed between the two sleeve holes. The first disc brake piece (71) is detachably sleeved on one end of the hub (1) and located at the arc-shaped clamping groove (2) part. The first sleeve (72) is a circular ring structure, and the inner side wall is equidistantly provided with a first protrusion corresponding to the arc-shaped clamping groove (2). The first sleeve (72) is movably sleeved on one end of the hub (1) and located at the arc-shaped clamping groove (2) part. The first sleeve (72) is located on the right side of the disc brake piece and is attached to the middle side wall of the hub (1). The sleeve rods (73) are in a cross-shaped structure, and the middle diameter is greater than the diameter of the two ends. The sleeve rods (73) are equidistantly fixed on the left side wall of the first sleeve (72), and the other end is movably penetrated into one of the second sleeve holes. The limiting units (74) are equidistantly fixed on the left side wall of the first sleeve (72) and movably penetrated into the other two second sleeve holes.

3. A disc brake pad assembly for use in a disc brake according to claim 2, wherein The hub (1) is provided with a second disc brake structure (8), wherein the second disc brake structure (8) comprises a second disc brake piece (81), a pair of locking units (82) and a second sleeve (83); The second disc brake piece (81) has the same structure as the first disc brake piece (71). The second disc brake piece (81) is detachably sleeved on one end of the hub (1) and located at the arc-shaped clamping groove (2) part. The locking units (82) are correspondingly arranged on the adjusting grooves (77) of the second disc brake piece (81). The second sleeve (83) is a circular ring structure, and the side wall is symmetrically provided with a pair of lock rods (84) corresponding to the first lock hole (3). The second sleeve (83) is detachably sleeved on the threaded rod of one end of the hub (1) and located on the left side of the arc-shaped clamping groove (2). The lock rod (84) is movably inserted into the first lock hole (3) and penetrates the first insertion hole (4).

4. A disc brake pad assembly for use in a disc brake according to claim 3, wherein The locking unit (82) comprises a pair of lock seats (821), assembly bolts (822) and lock plates (823). A pair of lock seats (821) are convex structures, a pair of lock seats (821) are symmetrically provided with second disc brake pads (81) left and right sides, and are respectively located in the adjusting groove (77) parts, a pair of lock seats (821) are respectively movably inserted into the adjusting groove (77), the assembly bolt (822) is movably screwed into the pair of lock seats (821), and penetrates the adjusting groove (77), the lock plate (823) is fixedly arranged on the side wall of one of the lock seats (821), and is located on the right side of the second disc brake pad (81), the lock plate (823) is movably inserted into the first insertion hole (4) and movably sleeved on the lock rod (84).

5. A disc brake pad assembly for use in a disc brake according to claim 4, wherein The disc brake assembly for disc brake lock further includes a baffle (6), and the baffle (6) is attached to the left side of the first disc brake pad (71) or the left side of the second sleeve (83).

6. The method of using a disc brake pad assembly for a disc brake as defined in claim 5, wherein, The method comprises the following steps: Step one, first, the first sleeve (72) is sleeved on the arc-shaped clamping groove (2) of the hub (1); Step two, then the first disc brake pad (71) is sleeved on the hub (1), and is sleeved on the two sleeve rods (73) by means of the second sleeve hole for limiting; Step three, at the same time, the second sleeve hole is sleeved on the first clamping rod (741) and the second clamping rod (743) in the limiting unit (74), and the adjusting bolt (744) is rotated, so that the second clamping rod (743) is opposite to the first clamping rod (741) and is away from the other end, the first disc brake pad (71) is locked and limited, and the installation is completed; Step four, finally, the gasket and the mounting nut (5) are fixed on the car beam frame.

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