CN203239801U - Disc brake structure - Google Patents

Abstract

The utility model discloses a disc brake structure, which comprises a brake body, a brake wheel and a brake wheel, wherein the brake body is provided with a shaft hole and a disc embedding opening which penetrates through the shaft hole; one end of the pulling and lifting arm is pivotally arranged in the shaft hole, and a torsion spring is arranged between the pulling and lifting arm and the shaft hole, so that the torsion spring drives the pulling and lifting arm to pivotally reset; the first brake block is arranged in the shaft hole and positioned on one side of the disc embedding opening close to the pulling and lifting arm; the ball power device is arranged in the shaft hole and positioned between the brake pad and the pulling and lifting arm, and the pulling and lifting arm drives the ball power device to drive the brake pad to move towards one side far away from the pulling and lifting arm when rotating; and the U-shaped elastic sheet is arranged in the disc embedding opening, and the free end of the U-shaped elastic sheet is abutted against the first brake pad, so that the first brake pad is driven to reset. The utility model discloses replace former reset spring with the torsional spring to avoided pulling the relative horizontal migration when holding up the arm and using, had characteristics such as the assembly is simple, preparation low cost, and can the stroke of manual regulation brake block.

Description

Disc Brake Structure

technical field

The utility model relates to a bicycle disc brake structure, in particular to a disc brake structure with the characteristics of simple assembly, low manufacturing cost and the like. the

Background technique

Bicycle, as a kind of environmental protection, healthy means of transport, is more and more liked by the general public, especially teenagers. In order to improve the braking performance of bicycles, more and more bicycles or similar sports equipment have adopted butterfly brake structures. The brake structure of this mechanical structure has many advantages such as reliable performance, easy manufacture and low production cost. the

The butterfly brake structure can be divided into push rod type and bearing type according to the structure. As disclosed in Chinese patent 201020282440.8, it is a typical push rod butterfly brake structure. It usually includes a disc socket in which the brake disc rotates; there are brake pads on both sides of the disc socket, one of which can be driven by a ball power device, and the power of the ball power device comes from a rotatable Pull the arm. In this way, when braking, the operator presses the handbrake to drive the wire rope to rotate the pulling arm, and the pulling arm drives the push rod of the ball power device to rotate, so that the balls roll on the ball track on the slope surface, so that the ball seat moves in a straight line , so that the brake pads are pushed out, and the brake disc is squeezed to achieve braking. Release the handbrake, the back-moving spring drives the pulling arm to rotate in the opposite direction to reset, and the brake pads are reset inwardly. This brake structure has the advantages of few parts, low price, and simple assembly; its disadvantage is that when braking, the return spring simultaneously twists and squeezes, so that the pulling arm also rotates correspondingly and moves inward. Move, affect the stability of its stay rope structure and the reliability of braking. the

In order to solve this problem, some manufacturers have designed a new bearing-type structure. That is to say, the installation position of the return spring is changed to the other side of the disc socket, so as to ensure that when the pull arm rotates, its horizontal relative position remains constant, thereby improving the stability of the pull cord structure and the reliability of the brake. However, it also has a big problem, that is, too many components, difficult assembly and high cost. the

In the brake structures of the above two structures, ball power devices of various structures well known in the industry can be used to drive the brake pads. The basic structure of the ball power device usually includes a ball seat and a push rod, wherein the ball seat is provided with 3 ball raceways with slopes, and a ball or a roller is arranged in each ball raceway; the push rod includes a disc part and a rod part, Corresponding ball grooves or symmetrical ball raceways with slopes can be arranged on the plate portion, and the rod portion is threadedly connected to the pull arm. Ordinary skilled persons in the industry can also make deformations to design more similar structures, as long as the rotation can be changed into a small-scale linear motion. the

In addition, the above two structures also have a common defect, that is, after a period of use, the brake pads wear and tear, resulting in insufficient brake friction. Only professional tools can be used to adjust the stroke of the brake pads and increase the brake friction. This is obviously not suitable for various emergencies in the wild, which reduces the user's ease of use. the

Contents of the invention

In view of the above disadvantages, the utility model provides a disc brake structure with convenient assembly and low cost. the

The technical solution of the utility model is to provide a disc brake structure, which includes a brake body, which has a shaft hole passing through the brake body, and a disc insert penetrating through the shaft hole along a direction perpendicular to the shaft hole. Mouth; It is characterized in that: it also includes:

A pull arm, one end of which is pivotally installed in the shaft hole, a torsion spring is arranged between the pull arm and the shaft hole, and the torsion spring drives the pull arm to pivot and reset; as well as

a first brake pad, installed in the shaft hole and located on the side of the disc socket close to the pull arm; and

A ball power device, which is installed in the shaft hole and located between the brake pad and the pull arm, when the pull arm rotates, it drives the ball power device to drive the first brake pad away from one side of the pull arm moves; and

A U-shaped shrapnel is installed in the disc embedding, and one free end thereof abuts against the first brake pad, thereby driving the first brake pad to reset.

Preferably, the ball power device includes a ball seat installed in the shaft hole and a push rod, the ball seat is installed in the shaft hole on a side away from the pulling arm, and the ball seat faces The end surface on one side of the push rod is radially and equidistantly recessed with several ball raceways with a slope, each ball raceway is embedded with a ball; The rod portion is threadedly connected to the pulling arm, and the disc portion is against each ball. the

Preferably, the push rod is provided with a through central hole along its axial direction, and an annular boss extending radially inward is provided at the edge of the central hole close to the ball seat, and one passes through the center The limit screw of the hole, its front part is threadedly connected with the said ball seat. the

Preferably, the same number of ball raceways is provided on the end face of the disc portion facing the ball seat at a position corresponding to the ball raceways of the ball seat. the

Preferably, it also includes a rear cover, which is fixed to the brake body through a screw, and the disc insert is arranged between the rear cover and the brake body. the

Preferably, it also includes a second brake pad, installed in the shaft hole and located on the side of the disc socket away from the pull arm. the

Preferably, a manual adjustment device for adjusting the position of the second brake pad is provided at the end of the shaft hole away from the pulling arm. the

Preferably, the manual adjustment device includes a nut part exposed outside the brake body, a cylindrical adjusting piece with one end closed and one end open is provided in the shaft hole, and an internal thread is provided on the inner wall of the shaft hole. The adjusting piece is screwed into the shaft hole through the external thread provided on its outer peripheral wall, the opening end of the adjusting piece is against the second brake pad, and the end surface of the closed end of the adjusting piece is provided with a penetrating A polygonal opening, a fixing screw threaded through the opening and connected to the nut part is provided in the cavity of the adjusting piece, and the fixing screw includes a step part that fits with the opening. the

The disc brake structure of the utility model replaces the original return spring with a torsion spring, thereby avoiding the relative horizontal movement of the pull arm when in use, and without adding too many parts, so that the characteristics of simple assembly and low manufacturing cost can be easily obtained. And the stroke of the brake pad can be manually adjusted, which is a new disc brake structure with great promotion value. the

Description of drawings

Fig. 1 is the decomposition structure schematic diagram of the present utility model;

Fig. 2 is the front view of the utility model;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the right view of Fig. 2;

Fig. 5 is the top view of Fig. 2;

Fig. 6 is the bottom view of Fig. 2;

Fig. 7 is a sectional view taken along line A-A of Fig. 2 . the

Detailed ways

The specific implementation manner of the present utility model is described in further detail below. the

As shown in Figures 1 to 7, a disc brake structure of the present invention includes a brake body 10, and the brake body 10 is provided with a shaft hole 12 that runs through the brake body 10, and the two sides of the shaft hole 12 are respectively arranged Back cover 14 and pulling arm 16 are arranged. A disc socket 18 penetrating through the shaft hole 12 is disposed between the brake body 10 and the rear cover 14 along a direction perpendicular to the shaft hole 12 . One end of the pulling arm 16 is pivotally installed in the shaft hole 12, a torsion spring 19 is arranged between the pulling arm 16 and the shaft hole 12, two free ends of the torsion spring 19, one end is embedded in the pulling arm 16, and the other is One end is embedded in the brake body 10 , whereby the torsion spring 19 can drive the pulling arm 16 to pivot and reset. And the torsion spring 19 will not move along the axial direction of the shaft hole 12, so the structure of the pulling arm 16 is very stable. the

Brake pads are arranged in the axle holes 12 on both sides of the disc socket 18 , the side close to the pulling arm 16 is the first brake pad 20 , and the other side is the second brake pad 22 . the

The U-shaped shrapnel 24 is installed in the disc socket 18 , and its two free ends abut against the first brake pad 20 and the second brake pad 22 respectively, thereby driving the first brake pad 20 to reset. the

A ball power device 26 is disposed in the shaft hole 12 between the first brake pad 20 and the pull arm 16 . The ball power unit 26 includes a ball seat 261 and a push rod 262 installed in the shaft hole 12, the ball seat 261 is installed in the shaft hole 12 on the side away from the pull arm 16, and the ball seat 261 faces the pull arm 16- The end surface of the side is recessed with several ball raceways 263 with a slope at equal intervals along the radial direction, and a ball 264 is embedded in each ball raceway; the push rod 262 includes a disc part 2621 and a rod part extending from the center of the disc part 2622 , the rod portion 2622 is threaded to the pulling arm 16 , and the disk portion 2621 is also correspondingly provided with a ball raceway (not shown) with a slope, so as to cooperate with the ball raceway 263 on the ball seat 261 to clamp each ball 264 . With this structure, when the pulling arm 16 rotates, it drives the rod portion 2622 and the disk portion 2621 to rotate, thereby pushing the ball 264 to move along the ball track 263 and roll up the slope therein, thereby moving the ball seat 261 away from the push rod. Then push the first brake pad 20 to move outward, so as to squeeze the brake disc (not shown) to generate frictional force, thereby forming a brake. the

The push rod 262 is provided with a penetrating central hole 2623 along its axial direction, and the central hole 2623 is provided with an annular boss 2624 extending radially inwards near the edge of the ball seat 261, and a limit screw 265 passing through the central hole. , its front portion is threaded with the ball seat 261. With this structure, the distance between the ball seat 261 and the push rod 262 can be limited, and the distance between the ball seat 261 and the push rod 262 can be prevented from being too large so that the balls 263 therein can fall. the

A manual adjustment device 28 is provided at the end of the shaft hole 12 away from the pulling arm 16 for manually adjusting the position of the second brake pad 22 . The manual adjusting device 28 includes a nut portion 281 disposed outside the brake body 10 for easy manual rotation. The shaft hole 12 is internally threaded with a cylindrical adjusting piece 282 with one end closed and the other open. The opening end of the adjusting piece 282 abuts against the second brake pad 22 . The closed end of the adjusting piece 282 is provided with a through polygonal opening 283 . A fixing screw 284 passing through the opening 283 and screwed to the nut portion 281 is disposed in the cavity of the adjusting piece 282 . The fixing screw 284 includes a stepped portion (not shown) that fits the opening. With this structure, when the nut part 281 is manually rotated, the fixing screw 284 rotates at the same time, and its stepped part drives the adjustment piece 282 to rotate, so that the movement of the adjustment piece 282 is generated by its screw thread with the shaft hole 12, and then the second brake pad 22 is changed. position to improve the phenomenon of brake failure caused by brake pad wear. the

The above embodiment is only one implementation mode of the present utility model, and its description is relatively specific and detailed, but it should not be construed as limiting the patent scope of the present utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims. the

Claims (8)

1. A disc brake structure, which includes a brake body, which has a shaft hole passing through the brake body, and a disc socket that runs through the shaft hole in a direction perpendicular to the shaft hole; it is characterized in that: It also includes: A pull arm, one end of which is pivotally installed in the shaft hole, a torsion spring is arranged between the pull arm and the shaft hole, and the torsion spring drives the pull arm to pivot and reset; as well as a first brake pad, installed in the shaft hole and located on the side of the disc socket close to the pull arm; and A ball power device, which is installed in the shaft hole and located between the brake pad and the pull arm, when the pull arm rotates, it drives the ball power device to drive the first brake pad away from one side of the pull arm moves; and A U-shaped shrapnel is installed in the disc embedding, and one free end thereof abuts against the first brake pad, thereby driving the first brake pad to reset. 2. The disc brake structure according to claim 1, wherein the ball power device includes a ball seat and a push rod installed in the shaft hole, and the ball seat is installed in the shaft hole On the side away from the pulling arm, on the end surface of the ball seat facing the push rod side, several ball raceways with slopes are recessed at equal intervals along the radial direction, and a ball is embedded in each ball raceway; The push rod includes a disc and a rod extending from the axis of the disc, the rod is threadedly connected to the pulling arm, and the disc abuts against the balls. 3. The disc brake structure according to claim 2, characterized in that: said push rod is provided with a through center hole along its axis direction, and said center hole is provided with a radially extending hole near the edge of said ball seat. An annular boss extending inward, a limit screw passing through the central hole, and its front part is threadedly connected with the ball seat. 4. The disc brake structure according to claim 3, characterized in that: the end face of the disc facing the ball seat is provided with the same number of Ball track. 5. The disc brake structure according to claim 1, characterized in that: it also includes a rear cover, which is fixed to the brake body by a screw, and the disc insert is arranged between the rear cover and the brake body. between the brake body. 6. The disc brake structure according to any one of claims 1 to 5, characterized in that it further comprises a second brake pad installed in the shaft hole and located in the disc insert away from the One side of the pull arm. 7. The disc brake structure according to claim 6, wherein a manual adjustment device for adjusting the position of the second brake pad is provided at the end of the shaft hole away from the pull arm. 8. The disc brake structure according to claim 7, characterized in that: the manual adjustment device includes a nut part exposed outside the brake body, and a cylindrical adjustment with one end closed and one end open is arranged in the shaft hole. The internal thread is provided on the inner wall of the shaft hole, and the adjusting sheet is screwed into the shaft hole through the external thread provided on the outer peripheral wall. One end of the opening of the adjusting sheet is against the second brake. The end face of the closed end of the adjustment sheet is provided with a through polygonal opening, and the cavity of the adjustment sheet is provided with a fixing screw threaded through the opening to connect the nut part, and the fixing screw includes The stepped part of the opening shape fits.

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