WO2009100626A1 - Buffer device for disc brake - Google Patents

Abstract

A buffer device for a disk brake is provided. It comprises a cylinder (1) provided with at least a piston assembly (2), which includes a piston (21) and a push cover (23). The piston has an inner end (212) and an outer end (211), and an accommodating room (213) for receiving the push cover is provided in the inside end. An inner wall (217) is formed and extended from the bottom of the accommodating room toward the inside end. The outside diameter of the push cover is slightly less than the inside diameter of the accommodating room. The push cover has a first end (231) and a second end (232). The second end of the push cover is provided opposite to the inner end of the piston and is located within the accommodating room. A resilient assembly (22) is provided between the push cover and the piston. An outside wall (233) is formed and extended between the first end and the second end of the push cover. As being driven, the push cover can be dampened through the resilient assembly provided between the piston and the push cover. The application has the function of heat insulation, fine adjusting, and can achieve a two-stage buffer brake.

Description

 Disc brake buffer device

 The invention relates to a disc brake buffer device. Background technique

 Cycling is a popular leisure activity, and the design of bicycles has been continuously improved. Whether it is sports or leisure and comfortable bicycles, they have made great progress. In pursuit of exquisite beauty, bicycles The safety is also a standard that cannot be ignored. The brake system is one of the safety requirements for bicycles. The brakes of the brakes are often related to the safety of the rider. If the structure and efficiency of the brakes are not perfect, especially at high speeds. Under the driving, no matter the impulse and kinetic energy reach the highest value, if you can't get on the train smoothly, you can't get protection regardless of your own life or others' lives, and it is more likely to cause a large-scale disaster.

 Please refer to U.S. Patent No. 6,401,882, "The Thermal Insulation Device for Disc Brakes", which includes a caliper cover, a first and second friction member coupled to the caliper cover, and one or more movable calipers with the caliper cover. A coupled piston for moving one or both friction members. The first and second friction members constitute a rotor receiving slot. At least a first friction member movably couples the caliper cover, and the piston movably couples the caliper cover to move the first friction member between the released position and the brake position. Each piston has a portion of an internal pocket that receives the thermal insulation. A thermal insulation device is disposed between the piston and the first friction member to prevent heat from being transferred from the first friction member to the piston. The thermal insulation device has a first end with its first end face received in the recess of the piston, a second end spaced apart from the first end face by the second end face, and a side wall extending between the first and second end faces. The second end portion is received within the piston recess and the side wall has a projection extending from the side wall for separating the thermal insulation from the piston.

Since the kinetic energy generated by the rapidly running disk is quite large, the friction member is The frictional force required to hold the disc is also relatively large. Although the existing friction member is provided with a convex member to dissipate the thermal energy that is subjected to the frictional force, the heat is only connected by the thermal insulation device between the piston and the thermal insulation device. The insulating device is indirectly subjected to friction and is easily damaged; and the friction member is directly mounted with the piston, and is provided with any cushioning device, and the friction member or the piston is very susceptible to the friction of the disk and is damaged and worn. In addition, the existing piston is hydraulically pushed against the friction member and pushed against the brake pad to contact the disc. It is easy to make the disc deadlock, and the tire suddenly stops. It is very easy in sand and wet conditions. There is a risk of tire slippage, a danger of hygiene, and there are still many areas for improvement;

 In view of the problems existing in the above-mentioned existing structures, how to develop an innovative structure that is more ideal and practical, is eagerly awaited by consumers, and is also the goal and direction of relevant industry players to make efforts to develop breakthroughs.

 In view of this, the creator has been engaged in the manufacturing development and design experience of related products for many years. After actively designing and prudently evaluating the above objectives, the present invention has finally developed a practical invention. Summary of the invention

 The main technical problem to be solved by the present invention is to overcome the above-mentioned drawbacks of the prior art, and to provide a disc brake buffer device, which has the functions of heat insulation, fine adjustment, two-stage buffer brake, heat dissipation and the like.

 The technical solution adopted by the present invention to solve the technical problems thereof is:

A disc brake buffer device is characterized in that: the body comprises a cylinder body, the cylinder body is provided with at least one piston assembly, the piston assembly comprises a piston and a push cover, wherein: the piston is provided with an inner end And an outer end, the inner end is provided with a chamber, the chamber is accommodated by a push cover, and the bottom of the chamber extends toward the inner end to form an inner side wall; the outer diameter of the push cover is slightly smaller than the inner diameter of the inner cover The cover is provided with a first end and a second end, the second end of the push cover is opposite to the inner end of the piston, and the second end is received in the chamber, and an elastic member assembly is disposed between the push cover and the piston, and the cover is disposed Push the first end and the second The end portion extends to form an outer side wall; the elastic member assembly is disposed between the piston and the push cover, so that the push cover can be cushioned by the elastic member assembly when it is abutted against the top.

 In the above disc brake buffer device, a blocking ring is disposed between the outer side wall of the push cover and the inner side wall of the piston, and the push cover is mounted on the piston chamber by the blocking ring.

 In the foregoing disc brake buffer device, the elastic member assembly is formed by stacking a plurality of elastic sheets, thereby achieving the effect of elastic cushioning.

 In the above disc brake buffer device, wherein the elastic member assembly is formed by stacking a plurality of elastic sheets, the elastic sheet body is provided with an opening at the center, and the opening edge is provided with a plurality of cracks, thereby achieving the elastic buffering effect.

 In the above disc brake buffer device, the second end of the push cover is provided with a receiving chamber for assembling and positioning the elastic member assembly.

 In the above-mentioned disc brake buffer device, the second end of the push cover is provided with a receiving chamber, and the receiving chamber protrudes toward the second end to form a hollow guide post, by which the elastic member assembly is sleeved, so as to facilitate Assemble the positioning elastic member assembly.

 In the above-described disc brake buffer device, the cylinder block is provided with a claw portion, and two claw portions and two outer claw portions are respectively disposed on two sides of the claw portion, and the brake pad is clamped by the outer claw portion and the inner claw portion. The outer claw portion is used to block the outer side of the brake pad from directly contacting the cylinder, so that the brake pad and the piston assembly maintain a gap when the brake assembly is in an unbraked state.

 In the above disc brake buffer device, the chamber at the inner end of the piston is provided with a positioning block for assembling the elastic member assembly.

 In the above-mentioned disc brake buffer device, the outer side wall of the push cover is provided with a ring and four slots, and an inner ring groove is recessed in a middle portion of the inner side wall of the piston, by the ring groove of the push cover and the inner portion of the piston The ring groove allows the push cover to be mounted to the piston.

The invention has the functions of heat insulation, fine adjustment, two-stage buffer brake, heat dissipation and the like. Since the piston and the push cover are provided with a blocking ring, the heat conduction caused by the blocking ring is used to block the brake. The hydraulic oil to the outside of the piston prevents the hydraulic oil from being deteriorated by the high heat to achieve the heat insulation effect; further, the resistance ring is disposed between the inner ring groove of the piston and the ring groove of the push cover, so that the push cover is opposite to the push cover The piston has a slight margin of movement, so that even if the push cover and the brake pad are not in parallel angular contact, the angle of the brake ring can be automatically fine-tuned to adapt to the angle of the brake pad; the claw portion of the present invention is provided with an outer claw portion and an inner claw portion. a margin space for maintaining a gap between the brake pad and the cylinder by the outer claw portion. When the hydraulic pressure pushes the piston, the piston is pushed against the brake pad with the push cover and the elastic member assembly inwardly across the gap, so that the brake The first clip is generated by the disc clamp, and if the user continues to push the piston by the hydraulic pressure, the piston continues to push inward, so that the elastic assembly generates the second brake by the distance of the compression gap; The first section of the brake, using the elastic margin of the elastic member assembly, avoiding the deadlock of the disc and reducing the rotation speed of the disc, and then performing the second brake to achieve the buffered two-stage brake function; During operation, a large amount of thermal energy is generated by friction. The present invention utilizes the hollow elastic sheet body to compress the air, and the frictional heat is discharged from the hollow guide post of the push cover by the air, thereby preventing the heat energy from being transmitted to the piston and causing the hydraulic oil to deteriorate. And the second embodiment of the present invention provides an outer groove on the outer side wall of the push cover to assist the guide column to discharge the hot gas inward, thereby achieving an optimal heat dissipation effect. DRAWINGS

 The invention will now be further described with reference to the drawings and embodiments.

 1 is a perspective exploded view of a disc brake buffer device of the present invention.

 2 is a schematic view showing the assembly of the disc brake buffer device of the present invention.

 3 is a schematic view showing the disc brake buffer device of the present invention mounted on a disk.

 Figure 4 is a partial cross-sectional view showing the clamping portion of the claw portion and the brake pad of the present invention.

 5 to 7 are schematic views showing the cross-sectional operation of the first embodiment of the line AA shown in Fig. 2.

 Fig. 8 is a perspective view showing the appearance of a push cover according to a second embodiment of the present invention.

 9 to 11 are schematic views showing the cross-sectional operation of the second embodiment of the line AA shown in Fig. 2.

 The label in the figure shows:

1 cylinder 11 clamping space 111 claw 112 inner claw portion 113 outer claw portion

 114 fixed pin

 115 Brake Pad 12 accommodating slot 13 Clearance

 2 piston assembly 21 piston

 211 outer end

 212 inside end 213 chamber

 214 inner ring groove

 215 positioning block 216 oil seal ring 217 inner side wall

 22 Elastic member assembly 221 Elastic sheet body 222 Opening

 223 crack 23 push cover 231 first end

 232 second end 233 outer side wall 234 receiving room

 235 guide post 236 ring groove 237 block ring

 238 outer groove 3 cover 31 cover oil seal ring

 4 discs

 The present invention relates to a disc brake buffer device, as shown in Figs. 1 to 4, which mainly includes a cylinder block 1 in which:

As shown in FIG. 3, the cylinder block 1 is mounted on a disc 4 for bicycle disc brakes. A hollow space 11 is defined in the cylinder block 1. The clamping space 11 is pivoted by a fixing pin 114. The claw portion 111 is provided with two outer claw portions 113 and inner claw portions 112 respectively on the two sides of the claw portion 111, and the outer claw portion 113 and the inner claw portion 112 of the pair of claw portions are respectively clamped with a brake The two brake pads 115 are for holding the brake disc 4, and as shown in FIG. 4, since the outer side of the brake pad 115 is blocked by the outer claw portion 113, the outer side of the brake pad 115 is prevented from directly contacting the cylinder 1. When the brake pad 115 and the cylinder block 1 are in an initial state in which the brake action is not performed, a gap 13 can be maintained; the two sides of the cylinder block 1 are respectively provided with a receiving groove 12 for mounting the piston Assembly 2, and using the piston assembly 2 to push against the brake pad 115 to reach the clamp The effect of the solid disk 4;

 The two piston assemblies 2 accommodated in the two receiving slots 12 respectively include a piston 21 and a push cover 23. One of the piston assemblies 2 of the two piston assemblies 2 is provided with a cover outside the piston 21. 3 and a cover oil seal ring 31, thereby making the piston assembly 2 externally sealed; the outer side of the piston 21 is provided with an oil seal ring 216 and the accommodating groove 12 to catch the seal of the piston assembly 2, the piston The two ends are respectively disposed at the inner end 212 and the outer end 211. The inner end 212 is provided with a chamber 213. The bottom of the chamber 213 is provided with a positioning block 215, and the bottom of the chamber 213 extends toward the inner end 212. 217, the inner side wall 217 is provided with an inner ring groove 214; the chamber 213 is provided for the push cover 23;

 The two ends 232 of the push cover 23 are respectively disposed on the second end 232 of the push cover 23, and the second end 232 of the push cover 23 is recessed with a receiving chamber 234. A hollow guide post 235 is protruded from a bottom end surface of the receiving chamber 234. The hollow hole in the guide post 235 extends through the push cover 23 from the second end 232 to the first end 231. The first end 231 and the second end of the push cover 23 An outer side wall 233 is formed on the outer peripheral edge of the extension cover 23 of the end 232. The outer side wall 233 is recessed with a ring groove 236. The ring groove 236 is provided for a blocking ring 237. The push cover 23 is provided by the ring. The recess 236 is provided with a blocking ring 237, and is set by the blocking ring 237 and the inner ring groove 214 in the chamber 213, so that the push cover 23 can be installed in the chamber 213; the push cover 23 and the piston 21 An elastic member assembly 22 is disposed between;

 The elastic member assembly 22 is formed by a plurality of elastic sheets 221, and the elastic sheet body 221 is provided with an opening 222 at the center thereof. The opening 222 is equidistantly provided with a plurality of cracks 223, and the elastic member assembly has 22-end elasticity. The body 221 is a guide post 235 for accommodating the push cover 23 by the opening 222, and the other end of the elastic member assembly 22 is connected to the positioning block 215 in the chamber 213 of the piston 21. The positioning block 215 is used to abut the elastic member assembly. 22 to achieve the effect of positioning;

As shown in FIG. 2, the accommodating slots 12 on both sides of the cylinder block 1 are respectively provided with a piston assembly 2, and the outer side of the piston assembly 2 at one end is additionally provided with a cover 3 and a cover oil seal ring 31, and is externally The piston 21, the elastic member assembly 22, and the push cover 23 are disposed. The outer circumference of the piston 21 is provided with an oil seal ring 216 so that the hydraulic oil of the disc brake is not leaked, and is installed between the piston 21 and the push cover 23. With a blocking ring 237, use The blocking ring 237 stops the hydraulic energy generated by the brake from being transmitted to the hydraulic oil outside the piston 21, and prevents the hydraulic oil from being deteriorated due to high heat; in use, due to the distance between the brake pad 115 and the piston assembly 2 in the unbraked state 13 . The piston 21 is pushed by the oil pressure, and the piston 21 is pushed against the brake pad 115 with the push cover 23 and the elastic member assembly 22 inwardly across the gap 13 , so that the brake pad 115 clamps the disc 4 to generate the first brake. If the user continues to push the piston 21 by the oil pressure, the piston 21 continues to push inwardly, so that the distance between the elastic member assembly 22 and the compression gap 13 produces a second-stage brake, thereby achieving the buffered two-stage braking effect.

 Referring to FIG. 5 to FIG. 7 , in the initial state, as shown in FIG. 5 , the outer claw portion 113 blocks the outer side of the brake pad and maintains a gap 13 with the piston assembly, and the piston assembly 2 If the hydraulic push is not in the initial position, the push cover 23 is not in contact with the brake pad 115; when the user activates the brake, the hydraulic pressure pushes the piston assembly 2 inward, as shown in FIG. 6, the piston 21 is In conjunction with the distance between the elastic member assembly 22 and the push cover 23 facing the inner displacement gap 13, the push cover 23 is abutted against the brake pad 115, and the brake pad 115 is pushed against the disc 4, but due to the elasticity The assembly 22 has an elastic abutting force, so that the disc 4 is not deadlocked, so that the brake pad 115 still has a margin for pushing back, thus generating a slight brake in the first section; if the user continues to apply pressure, as shown in the figure As shown in Fig. 7, the hydraulic pressure continues to force the piston 21 to push inwardly, the piston 21 abuts the elastic member assembly 22, and the piston 21 also abuts against the top brake pad 115. The elastic member assembly 22 is a compression gap distance to The large rebound force pushes the piston 21 and the push cover 23 back, thus producing Two tight brakes, because the piston 21 also abuts the top brake pad 115 at the same time as the push cover 23, the contact area between the piston assembly 2 and the brake pad 115 is increased to increase the pushing force, and the elastic member assembly 22 is added. The rebounding force enables the brake pad 115 to be tightly clamped to the disc 4; thereby achieving the best cushioning effect of the two-stage brake.

In addition, as shown in the second embodiment of the present invention, the push cover 23 can open a plurality of outer grooves 238 on the outer sidewall 233, and the outer groove 238 extends from the second end 232 to the notch of the first end 231. The outer side wall 233 of the push cover 23 is also recessed with a ring groove 236, and the ring groove 236 is sleeved with a ring 237; as shown in the schematic diagram of the operation of FIG. 9 to FIG. Hydraulic push piston 21 In conjunction with the elastic member assembly 22, the push cover 23 pushes against the brake pad 115 to pass the gap 13 to generate a preliminary first-stage brake. If the piston 21 is continuously pushed, the piston 21 presses the elastic member assembly 22 against the top brake pad 115. The elastic member assembly 22 pushes against the push cover 23 to push the brake pad 115 with greater force to achieve a tighter second-stage braking effect; and the brake device generates a large amount of thermal energy due to friction, and the present invention is The hollow elastic sheet body 221 is used to discharge the heat energy from the hollow guide post 235 of the push cover 23, and is assisted by the outer groove 238 of the outer side wall 233 of the push cover 23, and the heat energy is discharged toward the inner side, and then the heat is blocked. The ring 237 blocks the heat transfer to the outside of the piston 21 to achieve heat dissipation, block heat, and prevent the hydraulic oil on the outside of the piston 21 from deteriorating.

 The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes and modifications made to the above embodiments in accordance with the technical spirit of the present invention are still Within the scope of the technical solution of the present invention.

 In summary, the present invention fully meets the needs of industrial development in terms of structural design, practicality and cost-effectiveness, and the disclosed structure is also an unprecedented innovative structure, novel, creative, practical, and relevant. The provisions of the patent requirements for inventions are therefore filed in accordance with the law.

Claims

Claim  A disc brake buffer device, characterized in that: the body comprises a cylinder body, the cylinder body is provided with at least one piston assembly, the piston assembly comprising a piston and a push cover, wherein:  The piston is provided with an inner end and an outer end, wherein the inner end is provided with a chamber, the chamber is accommodated by a push cover, and the bottom of the chamber extends toward the inner end to form an inner side wall;  The outer diameter of the push cover is slightly smaller than the inner diameter of the inner cover. The push cover is provided with a first end and a second end, and the second end of the push cover is opposite to the inner end of the piston, so that the second end is received in the chamber. An elastic member assembly is disposed between the push cover and the piston, and an outer wall is formed between the first end and the second end of the push cover;  The elastic member assembly is disposed between the piston and the push cover, so that the push cover can be cushioned by the elastic member assembly when it is abutted.  2. The disc brake buffer device according to claim 1, wherein: a blocking ring is disposed between the outer side wall of the push cover and the inner side wall of the piston, and the push cover is mounted on the piston capacity by the blocking ring. room.  The disc brake buffer device according to claim 1, wherein the elastic member assembly is formed by stacking a plurality of elastic sheets.  4. The disc brake buffer device according to claim 1, wherein: the elastic member assembly is formed by stacking a plurality of elastic sheets, and the center of the elastic sheet body is provided with an opening, and the opening edge is provided. There are several cracks.  The disc brake buffer device according to claim 1, wherein: the second end of the push cover is recessed with a receiving chamber for assembling the positioning elastic member assembly.  The disc brake buffer device according to claim 1, wherein: the second end of the push cover is recessed with a receiving chamber, and the receiving chamber protrudes toward the second end to form a hollow guide post. The guide post is sleeved with the elastic member assembly to facilitate assembly of the positioning elastic member assembly. The disc brake buffer device according to claim 1, wherein: the cylinder block is provided with a claw portion, and two claw portions and two outer claw portions are respectively disposed on two sides of the claw portion, Outer claw The brake pad is clamped with the inner claw portion, and the outer claw portion is used to block the outer side of the brake pad from directly contacting the cylinder body, so that the carriage and the piston assembly maintain a gap when the brake assembly is not braked.  The disc brake buffer device according to claim 1, wherein: the living chamber end chamber is provided with a positioning block for assembling the elastic member assembly.  The disc brake buffer device according to claim 1, wherein: the outer wall of the piston is recessed with a ring groove, and an inner ring groove is recessed in a middle portion of the inner wall of the piston. The ring groove of the push cover and the inner ring groove of the piston are mounted on the piston.