TWI888121B - Hydraulic compound mechanical brake caliper - Google Patents

Abstract

A hydraulic composite mechanical brake caliper includes a base body and a push rod structure. The base body is provided with a slot body. At least two brake assemblies are arranged in the slot body. Each brake assembly is connected to a rotating arm. The push rod structure and the rotating arm are arranged on the base body in a relative manner. The base body has a hydraulic cylinder. The hydraulic cylinder has an oil chamber. A piston rod extends into the oil chamber. The piston rod divides the oil chamber into an inner chamber and an outer chamber by a piston head. The outer oil chamber has an oil inlet hole and is connected to an oil pipe by a flow channel. One end of the piston rod extends to the outside of the oil chamber and is connected to the swing arm. When braking, pressure is generated to inject hydraulic oil from the oil pipe into the outer oil chamber, pushing the piston head to move to the inner oil chamber, pulling the swing arm to swing to the braking position to drive each brake component to brake the brake disc. When the brake stops, the swing arm returns to the release position to release the brake.

Description

Hydraulic compound mechanical brake caliper

The present invention relates to a brake caliper, in particular to a hydraulic composite mechanical brake caliper.

According to the press, brake calipers are divided into mechanical brake calipers and hydraulic brake calipers. Among them, the mechanical brake calipers use steel wires to drive the pads in the calipers to clamp the brake disc to achieve the braking effect. Because you need to press the handle to pull the steel wire when braking, and the friction of the steel wire will affect the smoothness of pulling, resulting in poor hand feel and more effort. When going down a long slope, pressing the handle for a long time will cause sore hands, and once the pressure is insufficient, the braking effect will immediately weaken, and there is a doubt that the brakes cannot be effectively braked.

Hydraulic brake calipers use hydraulic oil instead of steel wire to push the brake pads in the caliper in a completely sealed oil pipe to achieve the braking effect. Because the resistance is small when pressing the brake, the hand feels smoother and less laborious, which can reduce the hand soreness caused by long-term braking. However, long-term braking causes the friction between the brake pads and the brake disc to generate a lot of heat. This heat is transmitted to the oil pipe through the brake pads, causing the hydraulic oil in the oil pipe to expand due to heat, further pushing the brake pads toward the brake disc, resulting in a tight fit between the brake pads and the brake disc, which is prone to tire locking. Even if the handle is released, the hydraulic oil is still in a state of thermal expansion, shortening the distance between the brake pad and the brake disc, resulting in increased friction on the wheel rotation, affecting the riding experience. In order to prevent the hydraulic oil from overflowing when it expands, the requirements for structural design and manufacturing process are very high, resulting in high production costs.

Among them, Taiwan's new patent No. M563997 discloses a hydraulic brake oil pressure adjustment device structure, which connects the brake clamp with the brake handle on the handlebar of the bicycle through the extension of the brake line, so as to drive the swing arm to link the piston to move horizontally, so that the hydraulic oil stored in the oil chamber can be compressed and squeezed out by the piston head to drive the brake pads in the accommodation space to produce clamping. When the brake handle is released, the piston can be pushed back by the elastic element. However, the hydraulic pressure adjustment device structure still needs to construct a hydraulic oil containing structure with good sealing performance and is difficult to overflow, and the production process requirements are high. In addition, the hydraulic oil storage space is small and the heat dissipation is even worse, so the problem of abnormal brake caliper operation caused by hydraulic oil heating has not been solved.

Taiwan's new patent No. M510889 discloses an improved structure of a bicycle hydraulic brake. Although the hydraulic cylinder is independently arranged on one side of the brake caliper to block the heat conduction between the brake caliper and the hydraulic cylinder, it is still affected by the heat generated by the brake caliper. The actuating chamber is a sealed space with a small hydraulic oil storage space and poor heat dissipation effect. It still cannot effectively dissipate heat to avoid the problem of abnormal brake caliper operation caused by the rise in hydraulic oil temperature. In addition, the hydraulic cylinder has many structural components and a complex structure, and the production process is complicated.

In view of this, how to solve the above problems is the primary issue that this invention aims to solve.

The main purpose of the present invention is to provide a hydraulic composite mechanical brake caliper, which achieves effective braking effect by using a hydraulic cylinder to pull the swing arm to drive the brake assembly to clamp the brake disc relatively, and at the same time separate the hydraulic cylinder and the brake assembly and make them non-adjacent to each other, so as to solve the problem of oil temperature rising due to heat conduction during braking, which affects the braking effect.

To achieve the above-mentioned purpose, the present invention provides a hydraulic composite mechanical brake caliper, which includes: a base body, which is provided with a slot body, and at least two brake assemblies are arranged opposite to each other in the slot body, each brake assembly is connected to a rotating arm, and the rotating arm is swung to a braking position to drive each brake assembly to abut against each other to brake the brake disc, and reset to a release position to make each brake assembly separate from each other to release the brake disc; a push rod structure, which is opposite to the rotating arm and is arranged on the base body, and has a hydraulic cylinder, and the hydraulic cylinder The cylinder has an oil chamber for containing brake oil, a piston rod extends into the oil chamber, and the piston rod divides the oil chamber into an inner oil chamber and an outer oil chamber with a piston head. The outer oil chamber has an oil inlet hole and is connected to an oil pipe through a flow channel. One end of the piston rod extends to the outside of the oil chamber and is connected to the swing arm. The braking pressure generated during braking injects hydraulic oil from the oil pipe into the outer oil chamber, pushing the piston head to move toward the inner oil chamber, and then pulling the swing arm to swing to the braking position-a brake disc to complete the braking action.

Preferably, an oil pipe mounting portion is provided on the outside of the hydraulic cylinder, the flow channel penetrates the oil pipe mounting portion to connect the outer oil chamber and the oil pipe, and the oil pipe is detachably mounted on the oil pipe mounting portion.

Preferably, one end of the hydraulic cylinder is provided with an opening axially connected to the outer oil chamber, the opening is locked with a seal to prevent the hydraulic oil from leaking out, and the piston rod passes through the seal and extends to the outside of the oil chamber.

Preferably, the other end of the hydraulic cylinder farthest from the opening is provided with an air hole connected to the inner oil chamber to balance the air pressure in the oil chamber.

Preferably, a compression spring is provided in the inner oil chamber, and the compression spring pushes against the end surface of the piston head facing the inner oil chamber.

Preferably, the rotating arm is U-shaped, and its two ends are control ends and are connected to the corresponding brake components one by one. A linkage part is formed by protruding outward between the two control ends. One end of a connecting rod is rotatably arranged on the linkage part. The other end of the connecting rod is provided with a linkage hole. A bolt is rotatably inserted into the linkage hole and connected to the piston rod.

Preferably, one end of the bolt passes through a through hole, and the piston rod passes through the through hole and is locked relative to a limiter.

Preferably, the hydraulic cylinder and the seat body are integrally formed.

The above-mentioned purposes and advantages of the present invention can be easily understood from the detailed description and accompanying drawings of the following selected embodiments.

1: Seat

11: Tank

12: Brake assembly

121: Turntable

122: brake piece

123: Brake pads

124: junction

125: Groove

126: Steel Ball

13: Rotating arm

131: Control terminal

132: Interaction Department

133: Bolts

14: Connecting rod

141: Linkage hole

15: Bolt

151:Through hole

152: C-type buckle

16: Piston chamber

2: Push rod structure

21: Hydraulic cylinder

211: Open mouth

22: Oil chamber

221: Inner oil chamber

222: External oil chamber

223: Oil inlet hole

224: Stoma

23: Seals

24: Piston rod

241: Piston head

25: Oil pipe installation department

26: Runner

27: YouTube

28: Compression spring

29: Limiting parts

P1: Braking position

P2: Release position

G: Brake disc

Figure 1 is a schematic diagram of the three-dimensional structure of the present invention.

Figure 2 is a schematic diagram of the partial assembly structure of the present invention.

Figure 3 is a partial cross-sectional structural diagram of the rotating arm of the present invention in the braking position.

Figure 4 is a cross-sectional structural diagram of the braking state of the present invention.

Figure 5 is a partial cross-sectional structural diagram of the rotating arm of the present invention in the release position.

As shown in Figures 1 and 2, a hydraulic composite mechanical brake caliper provided by the present invention includes a seat body 1 and a push rod structure 2.

The seat 1 is provided with a slot 11, in which at least two brake assemblies 12 are arranged opposite to each other, and each brake assembly 12 is connected to a rotating arm 13. In this embodiment, the rotating arm 13 is U-shaped, and its two ends are control ends 131 and are connected to the corresponding brake assemblies 12 one by one.

The push rod structure 2 is opposite to the rotating arm 13 and is arranged on the base 1, and has a hydraulic cylinder 21. In other feasible implementations, the hydraulic cylinder 21 and the base 1 are integrally formed. An opening 211 is axially opened at one end of the hydraulic cylinder 21, and an oil chamber 22 for accommodating hydraulic oil is formed inwardly, and a seal 23 is locked at the opening 211 to prevent the hydraulic oil in the oil chamber from overflowing. A piston rod 24 extends into the oil chamber 22 with one end having a piston head 241, and the piston head 241 divides the oil chamber 22 into an inner oil chamber 221 and an outer oil chamber 222, and the other end passes through the seal 23 and extends to the outside of the oil chamber 22 to connect to the rotating arm 13.

As shown in FIG. 3, the outer oil chamber 222 also has an oil inlet 223 for hydraulic oil to be injected and flowed out. The outer part of the hydraulic cylinder 21 is provided with an oil pipe mounting portion 25, and a flow channel 26 is passed through the inner part thereof to connect an oil pipe 27 and the oil inlet 223 of the outer oil chamber. One end of the oil pipe 27 is detachably mounted on the oil pipe mounting portion 25, and the other end is connected to the brake lever (not shown in the figure), and the oil pipe 27 is filled with hydraulic oil. When braking, the pressure generated by pressing the brake handle pushes the hydraulic oil in the oil pipe 27 through the flow channel 26 and the oil inlet hole 223 into the outer oil chamber 222. As the amount of hydraulic oil in the outer oil chamber 222 increases, the piston rod 24 is further squeezed to move toward the inner oil chamber 221, and then the rotating arm 13 is pulled to rotate to the braking position P1 to drive the brake components 12 to relatively close to clamp the brake disc G, and use friction to reduce speed.

In order to balance the air pressure in the oil chamber 22, the other end of the hydraulic cylinder 21 relatively far from the opening 211 is also provided with an air hole 224 connected to the inner oil chamber 221 to prevent the gas generated when the piston rod 24 moves from causing the inner pressure of the oil chamber 22 to be too high and affecting the smoothness of the movement of the piston rod 24. In addition, a compression spring 28 is provided in the inner oil chamber 221. The compression spring 28 pushes against the end face of the piston head 241 facing the inner oil chamber 221, and uses the rebound force of the compression spring 28 to assist in pushing the piston rod 24 back to its original position and push the hydraulic oil back into the oil pipe 27.

Furthermore, to ensure the smoothness of the rotation of the piston rod 24 and the rotating arm 13, as shown in FIG. 2, a linkage portion 132 is formed between the two control ends 131 of the rotating arm 13, one end of a connecting rod 14 is rotatably mounted on the linkage portion 132 by a bolt 133, and the other end thereof is provided with a linkage hole 141, a bolt 15 is rotatably inserted into the linkage hole 141 and one end thereof is fixed by a C-shaped buckle 152. The other end of the bolt 15 passes through a through hole 151, and the piston rod 24 passes through the through hole 151 and is locked relative to a stopper 29. When the piston rod 24 moves toward the inner oil chamber 221, the connecting rod 14 can swing along with the movement of the piston rod 24, forming a predetermined space for the piston rod 24 to move, thereby preventing the piston rod 24 from deforming due to its own flexibility when pulling the rotating arm 13. In this embodiment, the limiting member is a hexagonal nut.

Furthermore, as shown in FIG. 4 , the tank 11 is provided with two piston chambers 16 which are opposite to each other, and each piston chamber 16 is provided with a brake assembly 12. In this embodiment, the brake assembly 12 includes a rotating disc 121, a stopper 122 and a brake block 123. The top end of the rotating disc 121 is provided with a coupling portion 124 for coupling with an external rotating arm 13, so as to drive the rotating disc 121 to rotate. The detent 122 is disposed on the push surface of the turntable 121, and the detent 122 has an axial surface facing the turntable 121 and a detent surface combined with the brake block. Between the turntable 121 and the detent 122, there is at least one groove 125 disposed on the axial surface of the detent 122 and a steel ball 126 slidably disposed in each groove 125, wherein the depth of each groove 125 presents a gradual change along the circumferential direction. In other words, the bottom surface of each groove 125 is formed into an inclined surface corresponding to its depth, and the steel ball 126 is located at different positions in the groove 125, and its height exposed outside the groove 125 is different corresponding to the depth of the position.

Accordingly, as shown in FIG. 3 and FIG. 4, when the brake lever is pressed, the pressure generated pushes the hydraulic oil in the oil pipe 27 through the flow channel 26 in the oil pipe mounting portion 25 and is injected into the outer oil chamber 222 from the oil inlet hole 223. As the filling amount of the hydraulic oil increases, the piston rod 24 is pushed to move toward the inner oil chamber 221 to push the compression spring 28, thereby pulling the connecting rod 14 to drive the rotating arm 13 to swing to the braking position P1 and then drive the rotating plate. 121 rotates, and the turntable 121 drives each steel ball 126 to move in the circumferential direction in each groove 125, that is, each steel ball 126 moves from the deep part of the groove 125 to the shallow part, so that the height of each steel ball exposed from the groove increases, and the detent 122 will be pushed away by each steel ball and move away from the turntable 121, thereby pushing the brake block 123 to move toward the brake disc G to clamp the brake disc G, and use friction to achieve the effect of braking and deceleration.

When the brake handle is released, as shown in FIGS. 4 and 5 , the pushing pressure is released, and the rotary disk 121 rotates back to its original position, thereby driving the rotary arm 13 to return to a release position P2. At this time, as shown in Figure 5, the rotating arm 13 is reset to pull the piston rod 24 toward the outer oil chamber 222, releasing the push on the compression spring 28. The restoring force of the compression spring 28 assists the piston rod 24 to move, and then pushes the hydraulic oil in the outer oil chamber 222 back into the oil pipe 27 from the oil inlet hole 223. The steel balls 126 are brought back to the depth of the groove 125 as the rotating plate 121 rotates in the reverse direction, so that the height of each steel ball 126 exposed from the groove 125 is reduced, and the detent 122 returns to its original position, and each brake block 123 is separated from the brake disc G, thereby releasing the braking effect.

The hydraulic composite mechanical brake caliper provided by the present invention has the following technical advances and advantages:

First, to prevent heat conduction from affecting the braking effect; the present invention separates the hydraulic cylinder and the brake assembly and places them apart from each other, preventing the heat generated by the friction between the brake pad and the brake disc of the brake assembly from being transferred to the hydraulic cylinder to cause the oil temperature to rise. The hydraulic oil is transported into the hydraulic cylinder through an oil pipe to form a flowing oil path to continuously release the heat in the hydraulic cylinder, and to prevent the expansion of the hydraulic oil from causing the brake component to be unable to effectively return to its original position, thereby affecting the braking effect.

Second, it has hydraulic braking force and good braking effect. The present invention utilizes the advantages of low resistance, smooth feel and effortless hydraulic brake to replace the steel cable to drive the rotating arm to swing between the braking position and the release position, and has the same braking effect as the hydraulic brake caliper.

Third, simplify the structure and reduce the manufacturing cost; the present invention separates the hydraulic cylinder and the brake assembly and sets them separately from each other, thus avoiding the problem of hydraulic oil heating up and expanding due to the pad heating up and overflowing from the hydraulic cylinder due to long-term braking, thereby simplifying the hydraulic cylinder structure and reducing the manufacturing cost.

However, the disclosure of the above embodiments is only used to illustrate the present invention, not to limit the present invention, so any changes in numerical values or replacement of equivalent components should still fall within the scope of the present invention.

In summary, those who are familiar with this technology should be able to understand that this invention can indeed achieve the above-mentioned purpose and actually complies with the provisions of the Patent Law, so they can apply for it in accordance with the law.

1: Seat

11: Tank

12: Brake assembly

13: Rotating arm

131: Control terminal

132: Interaction Department

14: Connecting rod

2: Push rod structure

21: Hydraulic cylinder

23: Seals

24: Piston rod

25: Oil pipe installation department

27: YouTube

Claims (7)

A hydraulic composite mechanical brake caliper, comprising: A base body, with a slot body, in which at least two brake assemblies facing each other are arranged, each brake assembly is connected to a rotating arm, and the rotating arm is swung to a braking position to drive each brake assembly to clamp the brake disc, and reset to a release position to separate each brake assembly to release the brake disc; A push rod structure is opposite to the swivel arm and is arranged on the base body, which has a hydraulic cylinder, and the hydraulic cylinder has an oil chamber for containing hydraulic oil. A piston rod extends into the oil chamber, and the piston rod divides the oil chamber into an inner oil chamber and an outer oil chamber by a piston head. A compression spring is arranged in the inner oil chamber, and the compression spring pushes against the end face of the piston head facing the inner oil chamber. The outer oil chamber has an oil inlet hole and is connected to an oil pipe through a flow channel. One end of the piston rod extends to the outside of the oil chamber and is connected to the swivel arm; The braking pressure generated during braking injects hydraulic oil from the oil pipe into the outer oil chamber, pushing the piston head to move toward the inner oil chamber, and then pulling the swing arm to swing to the braking position to brake the brake disc to complete the braking action. As described in claim 1, the hydraulic composite mechanical brake caliper has an oil pipe mounting portion on the outside of the hydraulic cylinder, the flow channel passes through the oil pipe mounting portion to connect the outer oil chamber and the oil pipe, and the oil pipe is detachably mounted on the oil pipe mounting portion. A hydraulic composite mechanical brake caliper as described in claim 1, wherein one end of the hydraulic cylinder is axially provided with an opening connected to the outer oil chamber, the opening is locked with a seal to prevent the hydraulic oil from overflowing, and the piston rod passes through the seal and extends to the outside of the oil chamber. As described in claim 3, the hydraulic composite mechanical brake caliper has an air hole connected to the inner oil chamber at the other end of the hydraulic cylinder far away from the opening to balance the air pressure in the oil chamber. A hydraulic composite mechanical brake caliper as described in claim 1, wherein the swivel arm is U-shaped, and its two ends are control ends and are connected to the corresponding brake components one-to-one. A linkage portion is formed by protruding outward between the two control ends, and one end of a connecting rod is rotatably arranged on the linkage portion. The other end of the connecting rod is provided with a linkage hole, and a bolt is rotatably inserted into the linkage hole and connected to the piston rod. As described in claim 5, the hydraulic composite mechanical brake caliper, wherein one end of the bolt passes through a through hole, and the piston rod passes through the through hole and is locked relative to a limit member. The hydraulic composite mechanical brake caliper as described in claim 1, wherein the hydraulic cylinder and the seat body are integrally formed.

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