TWI592330B - Hydraulic disc brake back pressure structure - Google Patents

Description

Back pressure structure of hydraulic disc brake

The invention relates to a disc brake, in particular to a back pressure structure of a hydraulic disc brake.

According to the bicycle, the function of the bicycle has been developed from the initial transportation to a special purpose use tool. Therefore, the population used is increasing, and the user's occasions are becoming more and more extensive, and the functional requirements on the bicycle are becoming stricter. In particular, the brake system for safety considerations has received special attention; in the brake device suitable for bicycle use, the performance of the conventional rim-type brake device (V-type brake) has gradually failed to meet the needs of today, especially For mountain biking, in the harsh riding environment, in addition to maintaining a safe and safe performance, it also requires sensitive handling. Therefore, it is necessary to innovate and develop a new brake mechanism to meet these strict requirements. Therefore, the disc brakes are gradually gaining importance, and the test proves that the brake performance is safer and more comfortable than that of the V-type brake.

The brakes of the disc brakes can be easily divided into mechanical disc brakes and hydraulic disc brakes; the tension of the brake discs of the mechanical disc brakes causes the brake pads in the calipers to rub and clamp the discs to produce a braking effect; the hydraulic disc brakes Pulling the brake lever activates the piston inside to compress the oil, and the pressure passes through the caliper from the oil pipe, thereby pushing the piston in the caliper and driving the brake pad to hold the disk. The invention mainly discusses the problems existing in the hydraulic disc brakes.

For example, the new patent of "Mr. Disc Brake Structure Improvement" is a conventional hydraulic disc brake structure, which has a caliper, a caliper has a slot on one side, and a hydraulic actuating member is arranged in the slot. The slot is provided for a brake clamp, the brake clamp has two opposite brake plates, and the second brake plate is placed in the slot of the caliper, and is pivoted by a pivot, and the two brake plates are opposite A brake pad is respectively fixed on the side, and a rest plate is pivoted between the two brake pads by using a pivot shaft, and each brake plate is separately fixed with a heat insulation effect on one side of each brake pad. Hot plate. When the hydraulic actuator is pushed against the brake plates, the brake pads can be clamped to the disc brakes of the vehicle body, and when the hydraulic actuator is removed, the brakes can be used to brake the brakes. The pad returns to the normal state.

However, the conventional hydraulic disc brake structure pulls the wheel away from the bicycle body during maintenance or handling, so that when the caliper is separated from the disc brake, if the brake handle is accidentally pressed, the disc brake is lost, so The pressure of the oil pressure through the hydraulic actuator to the second brake plate and the second brake pad will exceed the predetermined stroke, causing the pressure of the oil pressure in the caliper to be too high, and the recovery piece is a lateral elastic force, and the elastic force is limited, resulting in a reply. The film can't push back the two brake pads and the two brake pads. At this time, it can only be pushed back hard or the hydraulic system is relieved. However, the hard raft is quite laborious, and the hard smash is easy to damage the two brake plates and the second brake pads. Pressure is quite troublesome and difficult to control.

The present inventors have a hydraulic disc brake structure in view of the conventional structure, and it is easy to generate a recovery sheet which cannot push back the two brake plates and the second brake pads, but can only push back the hydraulic system or depressurize the hydraulic system. And the idea of creation, after many discussions and trial sample tests, and many corrections and improvements, the invention is finally introduced.

The invention provides a back pressure structure of a hydraulic disc brake, and the hydraulic disc brake comprises: a caliper, two brake pads, two brake pads, a recovery piece unit and a disc brake disc, wherein the caliper comprises a first first caliper body and a second caliper body, the caliper is in the first caliper body and the second tongs A slot is disposed between the body, and a recess is disposed on the opposite side of the first caliper body and the second caliper body for receiving a hydraulic actuator, and a fixing hole is disposed at the bottom of the tank, and the hydraulic pressure is actuated. a hollow rod is disposed in the center of the piece, the hollow rod has a hollow portion, and the hollow portion is provided with a fixing bolt, and the fixing bolt is fixed and fixed by the hydraulic pressing member and the fixing holes of the first tong body and the second tong body. An elastic element is disposed between the fixing bolt and the hydraulic actuator, and the hydraulic actuator has an automatic reset function, and the two brake plates are installed in the slot of the caliper, and the two brake pads are respectively The reticle unit is disposed between the two brake pads, and the disk brake disk is disposed between the two brake pads.

The main object of the present invention is to provide a hydraulic bolt assembly with a fixing bolt and an elastic member, so that the hydraulic actuator has an automatic reset function, and since the elastic member is disposed at the center of the hydraulic actuator, The effect of pushing the hydraulic actuator is good. Therefore, when the hydraulic pressure is transmitted through the hydraulic actuator to the second brake plate and the second brake pad, the pressure of the oil pressure in the caliper is too high, and the pressure can be smoothly The recovery piece unit and the elastic element push the two brake plates and the two brake pads back to the normal state, so that the oil pressure in the caliper returns to normal, without the need to push back or relieve the hydraulic system.

1‧‧‧ calipers

11‧‧‧ first tong body

111‧‧‧ 容容

1111‧‧‧Fixed holes

12‧‧‧ Second caliper body

121‧‧‧ 容容

1211‧‧‧Fixed holes

13‧‧‧ slotting

14‧‧‧Hydraulic actuators

141‧‧‧ hollow rod

1411‧‧‧ Hollow

142‧‧‧Perforation

15‧‧‧fixing bolt

151‧‧‧ Fixed Department

152‧‧‧Expanding Department

16‧‧‧Flexible components

17‧‧‧ Cover

2‧‧‧Brake plate

3‧‧‧ brake pads

4‧‧‧Response unit

5‧‧ ‧ disc brake disc

The first figure is a perspective view of the caliper of the hydraulic disc brake of the present invention.

The second figure is an exploded perspective view of the caliper of the hydraulic disc brake of the present invention.

The third figure is an exploded perspective view of the hydraulic actuator of the hydraulic disc brake of the present invention.

The fourth figure is another exploded view of the hydraulic actuator of the hydraulic disc brake of the present invention.

The fifth figure is an exploded view of the hydraulic actuator of the hydraulic disc brake of the present invention.

Figure 6 is a cross-sectional view of the hydraulic disc brake of the present invention.

Figure 7 is a cross-sectional view showing the brake state of the hydraulic disc brake of the present invention.

The eighth figure is a cross-sectional view of the brake handle that is mistakenly pressed when the caliper of the present invention is separated from the disc brake disc.

Please refer to the first figure, the second figure, the third figure, the fourth figure, the fifth figure and the sixth figure. The hydraulic pressure disc brake back pressure structure of the invention comprises: a caliper 1 and two brakes. a plate 2, a second brake pad 3, a recovery piece 4 unit and a disc brake disc 5, wherein the caliper 1 includes a first first caliper body 11 and a second caliper body 12, the first caliper body 11 and the second The tongs 12 are assembled together, and the caliper 1 is provided with a slot 13 between the first caliper body 11 and the second caliper body 12, and the first caliper body 11 and the second caliper body 12 are respectively disposed with an opposite side. The two slots 111 and 121 are respectively received by a hydraulic actuator 14 , and a fixing hole 1111 and 1211 are respectively disposed at the center of the bottom of the two slots 111 and 121. The two hydraulic actuators are respectively disposed. Each of the two hollow rods 141 has a hollow portion 1411, and the two hydraulic rods 14 are respectively provided with a through hole 142 corresponding to the hollow portion 1411. The hole 142 has a hole diameter smaller than the diameter of the hollow portion 1411. A fixing bolt 15 is disposed in each of the two hollow portions 1411. A fixing portion 151 is respectively disposed at one end of the two fixing bolts 15 , and the two fixing bolts 15 are fixed. The fixing portion 151 is respectively fixed and fixed by the through holes 142 of the two hydraulic actuators 14 and the fixing holes 1111 and 1211 of the first caliper body 11 and the second caliper body 12, and the other end of the fixing bolt 15 is provided with an enlarged portion 152. An elastic member 16 is disposed on the periphery of the two fixing bolts 15. The elastic member 16 is a telescopic spring that is elastically abutted between the bottom end of the hollow portion 1411 and the enlarged portion 152 of the fixing bolt 15 by the elastic recovery of the elastic member 16. The force causes the hydraulic actuator 14 to have an automatic reset function, the two brakes The plate 2 is disposed in the slot 13 of the caliper 1 , and the two brake pads 3 are respectively fixed on opposite sides of the two brake plates 2 , and the return plate unit 4 is disposed between the two brake plates 2 (the The recovery sheet unit 4 is at least one recovery sheet, and the disc brake disc 5 is disposed between the two brake pads 3.

The fixing portions 151 of the two fixing bolts 15 are provided with external threads, and the fixing holes 1111 and 1211 of the first caliper body 11 and the second caliper body 12 are provided with internal threads, and the fixing portions 151 of the two fixing bolts 15 and the first tongs The fixing holes 1111 and 1211 of the body 11 and the second caliper body 12 are fixed and fixed, and the external threads and the internal threads are screwed together.

A cover 17 is formed in the opening of the hollow portion 1411 of the hydraulic actuator 14 , and the hollow portion 1411 is closed by the cover 17 .

Please refer to the seventh figure. When the user wants to use the present invention to perform the clamping operation of the disc brake disc 5, the user only needs to pull the brake handle of the bicycle (not shown) to drive the oil to inject the oil into the caliper. 1 in the first plenum 11 and the second grooves 12 and 121 of the second caliper body 12, the hydraulic actuator 14 in the caliper 1 is pushed by the hydraulic pressure to the second damper 2 to push the second brake plate 2, Therefore, the second brake pad 3 can be clamped to the disc brake disc 5 to achieve the purpose of using the brake; when the user releases the brake handle, the hydraulic thrust of the actuating member 14 disappears, and the elasticity of the elastic member 16 is utilized. The restoring force pushes the hydraulic actuator 14 to the bottom of the pockets 111, 121 to automatically reset, and uses the elastic restoring force of the restoring unit 4 to push the second brake plate 2 and the second brake pad 3 back to the normal state (not clamped Brake state).

Furthermore, as shown in the eighth figure, when the wheel is pulled out of the bicycle body due to maintenance or handling, and the caliper 1 is separated from the disc brake pad 5, the brake pad 5 is lost between the two brake pads 3, at this time. If the brake pressure is accidentally pressed, the pressure of the oil pressure through the hydraulic actuator 14 on the second brake plate 2 and the second brake pad 3 will exceed the predetermined stroke, so that the pressure of the oil pressure in the caliper 1 is too high, then When the brake handle is released, since the restoring unit 4 is laterally elastic and the elastic force is limited, the two brake plates 2 and the two brake pads 3 cannot be smoothly pushed back by the recovery piece unit 4 alone, and the present invention is applied to the oil pressure. The actuating member 14 is provided with a fixing bolt 15 and an elastic member 16, so that the hydraulic actuator 14 has an automatic reset function, and since the elastic member 16 is disposed at the center of the hydraulic actuator 14, the hydraulic pressure is pushed back. The effect of the actuating member 14 is good, so that the two brake plates 2 and the two brake pads 3 can be smoothly pushed back to the normal state (the state without the brakes) by the returning piece unit 4 and the elastic member 16, so that the oil pressure in the caliper 1 returns to normal. It does not require hard pushback or pressure relief on the hydraulic system, and it is easy to use and practical.

1‧‧‧ calipers

11‧‧‧ first tong body

111‧‧‧ 容容

1111‧‧‧Fixed holes

12‧‧‧ Second caliper body

121‧‧‧ 容容

13‧‧‧ slotting

14‧‧‧Hydraulic actuators

141‧‧‧ hollow rod

1411‧‧‧ Hollow

15‧‧‧fixing bolt

151‧‧‧ Fixed Department

152‧‧‧Expanding Department

16‧‧‧Flexible components

17‧‧‧ Cover

2‧‧‧Brake plate

3‧‧‧ brake pads

4‧‧‧Response unit

5‧‧ ‧ disc brake disc

Claims (7)

The hydraulic pressure disc brake back pressure structure comprises: a caliper comprising a first first caliper body and a second caliper body, the caliper being disposed between the first caliper body and the second caliper body a slot is disposed on the opposite side of the first caliper body and the second caliper body, and the two pockets are respectively received by a hydraulic actuator, and the first caliper body and the second caliper body are respectively The oil is injected into the tank, and the hydraulic actuator is pushed by the oil pressure in the direction of the slot. The bottoms of the two tanks are respectively provided with a fixing hole, and the two hydraulic actuators are respectively provided with a hollow rod, and the two hollow rods respectively The utility model has a hollow portion, wherein the two hollow portions respectively receive a fixing bolt, and the two fixing bolts are respectively fixed and fixed by the hydraulic pressing member and the fixing holes of the first tong body and the second tong body, the two fixing bolts and the two oils An elastic member is respectively disposed between the pressing members, and the elastic member has the function of automatically resetting toward the bottom of the receiving groove; the second brake plate is installed in the slot of the caliper; the second brake pad is respectively Fixed on the opposite side of the two brake plates; and a recovery piece unit disposed on the Between the brake pedal. For example, the hydraulic pressure disc brake back pressure structure described in claim 1 further includes a disc brake disc disposed between the two brake pads. The hydraulic pressure disc brake back pressure structure according to claim 1, wherein the hydraulic actuator has a fixing hole disposed at a center of the bottom of the tank. The back pressure structure of the hydraulic disc brake according to claim 1, wherein the hydraulic actuator has a perforation corresponding to the hollow portion, the perforation aperture is smaller than the diameter of the hollow portion, and one end of the fixing bolt is fixed. The fixing portion is fixedly connected to the fixing hole of the first caliper body and the second caliper body by the perforation of the hydraulic actuator, and the other end of the fixing bolt is provided with an enlarged portion The edge sleeve is provided with an elastic element that is elastically engaged between the bottom end of the hollow portion and the enlarged portion of the fixing bolt. The hydraulic pressure disc brake back pressure structure according to claim 1, wherein the elastic element is a telescopic spring. The hydraulic pressure disc brake back pressure structure according to the first aspect of the invention, wherein the fixing portion of the fixing bolt is provided with an external thread, and the fixing holes of the first caliper body and the second caliper body are provided with internal threads, and the fixing The fixing portion of the bolt is fixed to the fixing hole of the first caliper body and the second caliper body, and the external thread and the internal thread are screwed together. The back pressure structure of the hydraulic disc brake according to the first aspect of the invention, wherein the hollow portion of the hydraulic actuator is provided with a cover body, and the hollow portion opening is closed by the cover.