CN2631925Y - Single swing arm disc brake device - Google Patents

Abstract

The single swing arm disc brake device of the utility model comprises a disc, which is provided with a first surface and a second surface; the two guide rods are fixed on a bracket of a fork in parallel; a base with two guide holes and a brake block; the two guide rods penetrate through the guide holes of the base so that the base can slide along the two guide rods; a swing arm, on which a brake pad is fixed, the swing arm is pivoted on the base; a brake cable connected to the base and the swing arm for driving the base and the swing arm to move and swing, and a spring with two ends respectively abutting against the base and the swing arm, so that the two brake pads are separated from the disc in the initial state of the base and the swing arm.

Description

Single swing arm disc brake device

technical field

The utility model relates to a brake device, in particular to a single swing arm disc brake device.

Background technique

Ordinary disc brakes are mostly used in automobiles or motorcycles, and the driving method is mostly to use hydraulic pressure to drive the brake pads to press against the brake disc to produce a braking effect. Generally speaking, the disc brake device driven by hydraulic pressure has the problem of high cost. Therefore, we rarely see disc brakes applied to bicycles.

In the prior art, there is a device that drives the brake pads to press against the brake disc in the form of a pull wire. Taiwan New Patent Publication No. 478482 patent discloses a disc brake device, which utilizes the cooperation between the boss and the spiral groove, so that when the boss moves in the groove, the brake pad can be pressed against the brake disc . In addition, Taiwan New Patent Publication No. 410788 discloses another disc brake device, which is provided with several drop-shaped bead rails and cam posts that cooperate with each other. When the cam posts move in the bead rails, they can drive The brake pads press against the brake disc.

In the aforementioned two patents, the principle of driving the brake pads to move is to use a cam mechanism (cam mechanism) to change the rotary motion into linear motion. However, the creators found that in the aforementioned patents, whether it is a boss and a spiral groove or a cam post and a ball track, when foreign objects, such as dust, sand or iron filings, etc., run into the cam mechanism, it will easily cause the cam The mechanism is stuck, and the braking device is ineffective. In addition, the cam mechanism will also be corroded, which will cause the brake device to fail to function normally.

Utility model content

The main purpose of the utility model is to provide a single-swing arm disc brake device, which has a simple structure and is not prone to failure.

In order to achieve the aforementioned creative purpose, the single-swing arm disc brake device provided by the utility model includes a disc with a first surface and a second surface; the disc is fixed on the hub and can be used together with the hub rotation; a base, on which a brake pad is fixed, facing the first surface of the disc; the base is slidably combined with a bracket of a fork, so that the base can be in a first position , when the brake pad is separated from the first surface of the disc, and a second position, when the brake pad is in contact with the first surface of the disc; a swing arm, on which a brake pad is fixed, facing The second surface of the disc; the swing arm is pivotally connected to the base so that the swing arm can swing between the brake pad contacting the disc and the brake pad separating from the disc; a brake cable connected to To the base and the swing arm, used to drive the base and the swing arm to move, and a spring, the two ends of which are respectively against the base and the swing arm, so that the base and the swing arm are in the initial state , the two brake pads are separated from the disc.

It also includes two guide rods, one end of which is respectively fixed on the bracket; each of the two guide rods has a rod portion with a smooth surface exposed, and extends parallel and side by side; the base has two shaft holes for the two The guide rods pass through, so that the base can slide along the rods of the two guide rods.

Wherein the guide rod also has a head, located at one end of the rod, and a thread, located at a predetermined position of the rod near the head; the guide rod is locked into the screw hole on the bracket.

Wherein the outer end of the rod portion of the guide rod has a wall portion.

The brake pad fixed on the base is located between the two guide holes.

Wherein the base and the swing arm each have a shaft hole through which a bolt passes to make the swing arm pivot on the base, and the shaft hole on the base is located between the two guide holes.

Wherein the distance between the brake pad on the base and the first surface of the disc is between 0.1mm and 2mm.

Wherein the base has an extension section that bends outwards to one side of the second surface of the disc, and the swing arm has a drive section that bends outwards and extends to one side of the first surface of the disc , one end of the brake cable passes through the drive section and is fixed to the extension section.

Wherein the brake cable passes through the spring.

Description of drawings

In order to describe the structure and characteristics of the present utility model in detail, below in conjunction with the preferred embodiment and in conjunction with the accompanying drawings, describe in detail as follows, wherein:

Fig. 1 is an exploded view of a preferred embodiment of the utility model;

Fig. 2 is a perspective view of a preferred embodiment of the utility model;

Fig. 3 is a perspective view of another viewing angle of a preferred embodiment of the present invention;

Fig. 4 is a front view of a preferred embodiment of the present invention, showing that the base and the swing arm are in the initial state;

Fig. 5 is a front view of a preferred embodiment of the present invention, showing that the brake pad is pressed against the brake disc;

Figure 6 is a partial enlarged view of Figure 4, and

FIG. 7 is a partially enlarged view of FIG. 5 .

Detailed ways

Please refer to Fig. 1 to Fig. 3, the single swing arm disc brake device provided by a preferred embodiment of the present invention includes:

A disc 10 is fixed on the hub 70 so that the disc 10 and the hub 70 can rotate together. The disk 10 has a first surface 11 and a second surface 12 .

Two guide rods 20 are two bolts in appearance, each guide rod 20 has a head 21 and a rod 22, wherein the rod 22 is a smooth round rod, and there is a section of thread near the head 21 23, and has a wall portion 24 near the free end. The two guide rods 20 are respectively locked into two screw holes 74 provided on a bracket 72 of a front fork or a rear fork, so that the rods 22 extend parallel to each other outside.

A base 30 is generally an elongated block with a base section 31 and an extension section 32 . The base section 31 has two lateral guide holes 33, a brake pad holder 34, a shaft hole 35 and a screw hole 36, wherein the brake pad holder 34 is located between the two guide holes 33, and a brake pad is fixed on it. Sheet 37, the shaft hole 35 is located above the brake pad seat 34, but is still located between the two guide holes 33, and the screw hole 36 is located at a predetermined position near the outer end of the extension section 32 of the base 30.

The base 30 is sleeved on the rod portion 22 of the two guide rods 20 with the two guide holes 33, so that the base 30 is engaged on the bracket 72 of the front (rear) fork, and the wall portions of the two guide rods 20 24 is for preventing the base 30 from breaking away from the two guide rods 20 . The portion of the rod portion 22 exposed outside the bracket 72 has a length (excluding the wall portion 24 ) greater than the thickness of the base 30 , so the base 30 can move along the extending direction of the two guide rods 20 . It is defined as a first position when the base 30 moves to the support 72 of the front (rear) vehicle fork, and when the base 30 moves to the outer end (wall portion 24) of the guide rod for a predetermined After the distance, a second location is reached.

The base section 31 of the base 30 is located on one side of the first surface 11 of the disc 10, so that the brake pad 37 faces the first surface 11 of the disc 10, and is located at a predetermined distance from the center of the disc 10. A predetermined position of the distance (in practice, the closer the brake pad 37 is to the outer edge of the disc 10, the better the braking effect can be produced, but it is best to keep all areas of the brake pad 37 in contact with the disc 10 ). A predetermined distance is kept between the brake pad 37 and the first surface 11 of the disc 10 (practically, 0.1 mm to 2 mm can be reserved). The extension section 32 of the base 30 is bent outward from one end of the base section 21 , so that the screw hole 36 is located on one side of the second surface 12 of the disk 10 .

A swing arm 40 has a shaft hole 41 in the center, and is divided into a driving section 42 and a braking section 43 by two sides of the shaft hole 41 . The swing arm 40 has a through hole 44 at the end of the driving section 42 , and has a brake pad holder 45 at the end of the brake end 43 , on which a brake pad 46 is fixed.

The swing arm 40 is locked into the shaft hole 35 of the base 30 by a bolt 47 passing through the shaft hole 41 , so that the swing arm 40 can swing within a predetermined angle with the bolt 47 as an axis. The brake section 43 of the swing arm 40 is located on one side of the second surface 12 of the disc 10, so that the brake pad 46 corresponds to the brake pad 37 on the base, and the drive section 42 of the swing arm 40 extends to the One side of the first surface 11 of the disc 10 is opposite to the extension 32 of the base 30 .

A brake cable 50 has a sleeve 51, one end passes through the perforation 44 on the driving section 42 of the swing arm 40, and is locked into the screw hole 36 of the extension section 32 of the base 30 by a screw 38 and a nut 39, It is fixed on the base 30; the other end of the brake cable 50 is connected to a brake controller (not shown). Thus, the user can pull the brake cable 50 by driving the brake controller.

A spring 60 is sheathed on the brake cable 50 , located between the extension section 32 of the base 30 and the driving section 42 of the swing arm 40 , and two ends respectively abut against the two. In this way, the base 30 and the brake pads 3 and 46 on the swing arm 40 are not in contact with the disc 10 in the initial state (or the state without force).

With the above structure, when the user operates the brake controller to pull the brake cable 50, the swing arm 40 will swing accordingly to make the brake pad 46 press against the disc 10; at the same time, the extension of the base 30 The segment 32 is also pulled simultaneously, so that the base segment 31 moves from the first position to the second position along the two guide rods 20, causing the brake pad 37 to press against the disc 10, as shown in Figures 5 and 7 As shown; and when the user releases the brake controller, the restoring force of the spring 60 will drive the base 30 and the swing arm 40 back to their initial positions, as shown in FIGS. 4 and 6 .

The utility model has the advantages of:

1. Simple structure and low failure rate:

The main components of the single swing arm disc brake device provided by the utility model are only the two guide rods, the base, the swing arm, the brake cable and the spring; Less, so the chance of failure is also lower.

2. Easy to assemble:

The single-swing arm disc brake device provided by the utility model does not have any small and difficult-to-assemble components, so it is relatively easy to assemble, so that the manufacturing cost can be greatly reduced, and the market competitiveness of the product can be improved.

3. Excellent braking effect:

When the single-swing arm disc brake device of the present invention produces a braking effect, even under light braking conditions, the base and the brake pads on the swing arm will simultaneously press against the two sides of the disc, so that Provides a stable and balanced braking effect.

Claims (9)

1. A single swing arm disc brake device, characterized in that it comprises: A disc has a first face and a second face; the disc is fixed to the hub; a base, on which a brake pad is fixed, facing the first surface of the disc; the brake pad is separated from the first surface of the disc, and a second position in which the brake pad is in contact with the first surface of the disc; a swing arm, on which a brake pad is fixed, facing the second surface of the disc; the swing arm is pivotally connected to the base; a brake cable connected to the base and the swing arm, and A spring, the two ends respectively lean against the base and the swing arm. 2. The single-swing arm disc brake device according to claim 1, further comprising two guide rods, one ends of which are respectively fixed on the bracket; each of the two guide rods has a smooth surface. The rods are exposed and extend in parallel; the base has two shaft holes for the two guide rods to pass through. 3. The single swing arm disc brake device according to claim 2, wherein the guide rod further has a head, located at one end of the rod, and a thread, located at the rod near the head The predetermined position; the guide rod is locked into the screw hole on the bracket. 4. The single swing arm disc brake device according to claim 2, wherein the outer end of the rod portion of the guide rod has a wall portion. 5. The single swing arm disc brake device according to claim 2, wherein the brake pad fixed on the base is located between the two guide holes. 6. The single-swing arm disc brake device according to claim 2, wherein the base and the swing arm each have a shaft hole for a bolt to pass through so that the swing arm is pivotally mounted on the swing arm on the base, and the shaft hole on the base is located between the two guide holes. 7. The single swing arm disc brake device according to claim 1, wherein the distance between the brake pad on the base and the first surface of the disc is between 0.1mm and 2mm. 8. The single-swing arm disc brake device according to claim 1, wherein the base has an extension section that bends and extends outward to one side of the second surface of the disc, the swing arm There is a driving section, which bends and extends outward to one side of the first surface of the disc, and one end of the brake cable passes through the driving section and is fixed on the extending section. 9. The single swing arm disc brake device according to claim 1, wherein the brake cable passes through the spring.

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