TW201924986A - Brake pump for interlocking brake system - Google Patents

Abstract

The present invention relates to a brake pump for an interlocking brake system, which comprises a first brake pump and a second brake pump. The first brake pump includes a first cylinder block, a first brake lever, an actuation rod and a brake wire. The first cylinder block includes a first oil chamber, a first piston and a first spring. The first brake lever is pivotally connected on the first cylinder block, and the actuation rod is pivotally connected on the first cylinder block for pushing the first piston to produce the change of oil pressure. Wherein, the brake wire includes a pipe and an inner wire inserted in the pipe. One end of the pipe is fixedly connected on the actuation rod, and one end of the inner wire is connected on the first brake lever. As such, a former balance member can be combined with a pressing member in the present invention to simplify the mechanism, and to remove the brake wire stand or other facility located on the cylinder block of the brake pump at the same time, which is good for spatial arrangement.

Description

Brake master cylinder for linked brake system

The invention relates to a brake master cylinder for a linked brake system, in particular to a brake master cylinder suitable for a locomotive for a linked brake system.

The conventional technology, such as the linked brake system disclosed in Taiwan Patent Publication No. TW201515924, please refer to FIG. 19, which is a configuration diagram of a conventional linkage brake system. As shown, the conventional linkage braking system includes a front wheel brake device 930 and a rear wheel brake device 940. The front wheel brake device 930 includes a front wheel brake 931, a hydraulic pipe 934, and a master cylinder 952. The rear wheel brake device 940 includes a rear wheel brake 941, a hydraulic pipe 944, and a master cylinder 962.

Among them, the master cylinder 962 is connected to the caliper 943 of the rear wheel brake 941 by a hydraulic pipe 944. Thereby, when the piston inside the master cylinder 962 is pressed to the inside of the cylinder by the lever operation of the left brake lever 960, the hydraulic pressure generated in the master cylinder 962 is transmitted to the rear wheel brake 941 via the hydraulic piping 944. Caliper 943. Therefore, the rear wheel brake 941 can be actuated by the lever operation of the left brake lever 960.

Further, the balancer 970 is abutted on the left brake lever 960, and one end of the brake wire 975 is connected to the balancer 970, and the other end is connected to the pressing member 953. Therefore, by the lever operation of the left brake lever 960, the pressing member 953 is pressed against the piston in the master cylinder 952. The piston in the master cylinder 952 is also further actuated. Therefore, the master cylinder 952 and the master cylinder 962 can be interlocked by operating the left brake lever 960, so that the caliper 933 of the front wheel brake 931 and the caliper 943 of the rear wheel brake 941 can be sequentially driven to give the brake force to the front and rear wheels.

In the above prior art, when the left brake lever 960 is operated, the balancer 970 is required to achieve the linkage braking, but since the balancer 970 has different directions for the rear brake master cylinder 962, a new one must be added. The pressing member 963 diverts the force to achieve an effect, and also makes the mechanism more complicated. In addition, a brake wire fixing base 98 must be added to the master cylinder 962 to adjust the wire position of the brake wire 975, so that the volume of the master cylinder 962 becomes larger, which is disadvantageous for space configuration.

Because of this, in the spirit of active invention, this paper considers a brake master cylinder for the linked brake system that can solve the above problems, and finally completes the present invention after several research experiments.

The main object of the present invention is to provide a brake master cylinder for a linked brake system. By changing the configuration of the brake wire, in addition to integrating the conventional balance member and the pressing member into a single member, the mechanism is simplistic. At the same time, since the brake wire of the invention can be directly connected with the actuating lever and the brake lever, the installation of the brake wire fixing seat added to the outside of the brake master cylinder can be omitted, which is beneficial to the overall space configuration.

In order to achieve the above object, the present invention mainly provides two designs of a brake master cylinder for a linked brake system, the first brake master cylinder includes a first brake master cylinder, and the first brake master cylinder includes a first a cylinder block, a first brake lever, an actuating lever and a brake wire, the first cylinder having a first oil chamber, a first plunger and a first spring for accommodating hydraulic oil and providing timely The oil pressure changes, the first brake lever is pivotally connected to the first cylinder, and the first cylinder is pivoted, and the actuating lever is pivotally connected to the first cylinder, which is also the first The cylinder body pivots for the fixed end, and one end of the actuating rod has a first pushing portion for abutting the first plunger and generating a change in oil pressure.

Wherein, the brake wire comprises a sleeve and an inner thread extending through the sleeve, one end of the sleeve is fixed on the actuating rod, and one end of the inner line is connected with the first brake lever, thereby reducing the number of components arranged and simplifying each other Connection relationship.

The second brake master cylinder includes a first brake master cylinder, the first brake master cylinder includes a first cylinder block, a first brake lever, an actuating lever and a brake wire, and the first cylinder has a first oil chamber, a first plunger and a first spring for accommodating hydraulic oil and timely providing oil pressure change, and the actuating rod is pivotally connected to the first cylinder body, and is fixed by the first cylinder block The end pivots, and the first brake lever is pivotally connected to the actuating lever, and the actuating lever is pivoted for the fixed end, and one end of the actuating lever has a first pushing portion for abutting the first plunger and Produces oil pressure changes.

Wherein, the brake wire comprises a sleeve and an inner thread extending through the sleeve, one end of the sleeve is fixed on the actuating rod, and one end of the inner line is connected with the first brake lever, thereby reducing the number of components arranged and simplifying each other Connection relationship. The difference between the second brake master cylinder and the first brake master cylinder is that the manner in which the first brake lever is pivoted is different in the above two designs. In the present design, the first brake lever pivot Connected to the actuating rod, the first cylinder can be directly modified and used along the cylinder with the conventional non-coupling function, without additional adjustment of the hole position and the locking method, thereby reducing the additional mold opening cost and reducing the overall cost. Funding.

In order to construct a perfect linkage braking system, the invention not only has the first brake master cylinder described above, but also connects the first brake master cylinder and a second brake master cylinder to achieve the linkage function of the two wheels. Brake system.

The second brake master cylinder includes a second cylinder, a second brake lever, a first rocker arm and a second rocker arm. The second cylinder has a second oil chamber, a second plunger and a first a second spring for accommodating hydraulic oil and timely providing a change in oil pressure, and the second brake lever, the first rocker arm and the second rocker arm are pivotally connected to the second cylinder, and the second cylinder is fixed Pivoting, a rebound spring is arranged between the first rocker arm and the second cylinder body to provide a supporting force to control the starting timing of the linked braking system, and the second rocker arm has a second pushing portion for pushing the second The plunger produces a change in oil pressure. Wherein, the other end of the sleeve is fixed on the second cylinder, and the other end of the inner line is connected to the first rocker arm for forming a linkage braking system. Therefore, when the pulling force of the inner wire of the brake wire is greater than the restoring force of the rebound spring, the first rocker arm is caused to drive the second rocker arm to act, the function of the interlocking brake is successfully activated, and the second plunger is further pushed and generated. Oil pressure changes.

Alternatively, in order to construct a perfect interlocking brake system, the present invention not only has the first brake master cylinder described above, but also connects the first brake master cylinder with a drum brake mechanism to achieve one-wheel drive function and another round. A linked brake system with a drumstick function.

The drum brake mechanism may include a brake arm, a rebound spring and a fixing portion. Wherein, the other end of the sleeve is fixed on the fixing portion, and the other end of the inner line is connected to the braking arm for forming a linkage braking system. Therefore, when the tension of the inner wire of the brake wire is greater than the restoring force of the rebound spring, the brake arm can be actuated to successfully activate the interlocking brake function, and further between the brake shoe and the roller drum inside the drum brake mechanism. Produce braking force and limit the rotation of the wheel.

The above summary and the following detailed description are exemplary in order to further illustrate the scope of the invention. Other objects and advantages of the present invention will be described in the following description and drawings.

Please refer to FIG. 1 to FIG. 3 , which are respectively a structural diagram, an A-direction side view and an A-A cross-sectional view of a linked brake system with a first brake master cylinder and a second brake master cylinder according to a first embodiment of the present invention. The figure shows a linkage braking system comprising a first brake master cylinder 1 and a second brake master cylinder 2, which respectively control the brake system of the front and rear wheels, or interlock control the brake systems of the front and rear wheels.

The first brake master cylinder 1 is a new master cylinder of the present invention, comprising a first cylinder block 11, a first brake lever 12, an actuating lever 15 and a brake wire 8. The first brake lever 12 is pivotally connected to the first cylinder block 11. The pivot joint is a second pivot joint 112, and the actuating lever 15 is also pivotally connected to the first cylinder block 11. Defined as the first pivot point 111. The first cylinder block 11 has a first oil chamber 14, a first plunger 13 and a first spring 16. The first plunger 13 is disposed in the first cylinder block 11, and the first plunger 13 is pushed by the actuating rod 15 to move in the first cylinder block 11, and a first plunger 13 is formed between the first cylinder block 11 and the first cylinder block 11. The first oil chamber 14 is provided with a first spring 16 in the first oil chamber 14 to apply a spring force to the first plunger 13 for a long time.

On the other hand, the second brake master cylinder 2 uses a conventional type of master cylinder including a second cylinder block 21, a second brake lever 22, a first rocker arm 25, and a second rocker arm 27. The second brake lever 22, a first rocker arm 25 and a second rocker arm 27 are pivotally connected to the second cylinder block 21, and the pivot joint is a third pivot joint 221. The second cylinder 21 has a second oil chamber 24, a second plunger 23 and a second spring 26. The second plunger 23 is disposed in the second cylinder 21, and the second plunger 23 is pushed by the second rocker arm 27 to move within the second cylinder 21, and between the second plunger 23 and the second cylinder 21 A second oil chamber 24 is formed, and a second spring 26 is disposed in the second oil chamber 24 to apply a spring force to the second plunger 23 for a long time.

In the present embodiment, the brake wire 8 used in the present invention comprises a sleeve 81 and an inner wire 82 extending through the sleeve. One end of the sleeve 81 is fixed on the actuating rod 15 and the other end is fixed. It is disposed on the second cylinder block 21, and is fixed by the wire fixing seats 151, 251, respectively. One end of the inner wire 82 is connected to the first brake lever 12, and the other end is connected to the first rocker arm 25, and the first brake lever 12 can be forcefully transmitted to the first rocker arm 25 to form a linked brake system. In addition, the actuating lever 15 is provided with one of the above-mentioned wire fixing seats 151 at one end of the first pivoting point 111, and the first pushing portion 152 is provided at the other end, and the first pushing portion 152 can push the first plunger 13 to generate Displacement, and indirectly produces oil pressure changes.

With the above design, when the two brake master cylinders 1, 2 are combined with the brake wire 8, one end of the inner wire 82 is biased by the first brake lever 12, and the other end is linked with the first rocker arm 25, but the brake wire is 8 The sleeve 81 covered by the outer layer is located at one end via the actuating rod 15 and the other end is fixed on the second cylinder 21, and the two ends of the sleeve are not positioned on the cylinder as in the prior art. Therefore, the invention can save the additional fixing mechanism in the cylinder block and reduce the occupied volume.

Furthermore, in addition to the first brake master cylinder 1 and the second brake master cylinder 2, the first brake cylinder 1 of the first brake master cylinder 1 needs to be connected through a first brake cylinder 6 to a first The brake caliper 3 is used to clamp the inner blade and the disk to achieve the effect of decelerating the brake; similarly, the second cylinder 21 of the second brake master cylinder 2 is connected through a second brake pipe 7 A second brake caliper 4 is used to clamp the inner blade and the disk to achieve the effect of decelerating the brake. Wherein, a rebound spring 211 is interposed between the first rocker arm 25 and the second cylinder block 21, and the first rocker arm 25 is positioned in a direction by the rebound spring 211, when the first rocker arm 25 resists the rebound spring 211 When the elastic force is actuated, the second brake master cylinder 2 can output a hydraulic pressure to the second brake caliper 4 to achieve the effect of interlocking the brake.

Please refer to FIG. 4 and FIG. 5 , which are respectively a first actuation diagram and a second actuation diagram of the linkage braking system of the first brake master cylinder and the second brake master cylinder according to the first embodiment of the present invention. As shown in FIG. 4, when the first brake lever 12 is operated, since the rebound spring 211 of the second brake master cylinder 2 is larger than the first spring 16 in the first brake master cylinder 1, the actuating lever 15 will be subjected to The reaction force of the sleeve 81 is rotated by the first pivot point 111, so that the first pushing portion 152 pushes the first plunger 13, and the first oil chamber 14 is reduced in space to send a hydraulic pressure to the first brake caliper 3. power. As shown in FIG. 5, when the first brake lever 12 continues to apply force, the rebound spring 211 will be compressed by the first rocker arm 25 pulled by the inner wire 82, and the second brake master cylinder 2 will send oil pressure. The braking force is generated by the second brake caliper 4 to achieve the interlocking braking effect.

Please refer to FIG. 6 and FIG. 7 , which are respectively a structural view and a partial cross-sectional view of a linked brake system with a first brake master cylinder and a drum brake mechanism according to a second embodiment of the present invention. The figure shows a linkage braking system comprising a first brake master cylinder 1 and a drum brake mechanism 9, which respectively brakes the brake system of the front and rear wheels, or interlocks the brake systems of the front and rear wheels.

The structural features of the first brake master cylinder 1 are basically the same as those of the first embodiment, and will not be described again here. The only difference is that the brake device of the other wheel of the embodiment is a drum brake mechanism 9, The utility model comprises a brake arm 91, a rebound spring 911 and a fixing portion 90. The brake wire 8 includes a sleeve 81 and an inner wire 82 extending through the sleeve 81. One end of the sleeve 81 is fixed on the actuating rod 15 and the other end is fixed on the fixing portion 90; One end of the inner wire 82 is connected to the first brake lever 12, and the other end is connected to the brake arm 91 for forming the interlocking brake system. In this embodiment, the rebound spring 911 is interposed between the brake arm 91 and the fixed portion 90 such that the brake arm 91 is positioned in a direction by a rebound spring 911 when the brake arm 91 resists the rebound spring. When the elastic force of the 911 is activated, the drum brake mechanism 9 can generate the braking force.

Please refer to FIG. 8 and FIG. 9 respectively, which are respectively a first actuation diagram and a second actuation diagram of a linkage braking system with a first brake master cylinder and a drum brake mechanism according to a second embodiment of the present invention. As shown in FIG. 8, when the first brake lever 12 is operated, since the elastic force of the first spring 16 is greater than the elastic force of the rebound spring 911, the brake arm 91 will be pulled by the inner wire 82 to resist the spring force of the rebound spring 911. When the drum brake device 9 will generate the braking force; as shown in FIG. 9, when the first brake lever 12 continues to act, the actuating lever 15 will push the first plunger 13 against the elastic force of the first spring 16, so that the first oil The space of the chamber 14 is reduced and the oil pressure is sent to the first brake caliper 3 to generate the braking force, thereby achieving the purpose of interlocking the vehicle.

The first pivoting point 111 and the second pivoting point 112 in the first brake master cylinder 1 of the first brake master cylinder 1 of the first embodiment and the second embodiment may also be disposed in the first cylinder block. The first pivoting point 111 and the second pivoting point 112 can be combined into a single pivoting point, which is not limited to the pivoting manner in the illustration.

Next, please refer to FIG. 10 to FIG. 12 , which are respectively a structural diagram, a B direction side view and a B-B cross-sectional view of a linked brake system with a first brake master cylinder and a second brake master cylinder according to a third embodiment of the present invention. The figure shows a linkage braking system comprising a first brake master cylinder 1' and a second brake master cylinder 2, which respectively operate the brake system of the front and rear wheels, or interlocks the brake systems of the front and rear wheels.

The difference between the present embodiment and the first embodiment is only that the pivoting manner of the first brake lever 12 and the actuating lever 15 is different, and the other portions are the same as those of the first embodiment, and details are not described herein again. As shown in FIG. 12, the actuating lever 15' of the present embodiment is pivotally connected to the first cylinder block 11, which is pivoted by the first cylinder block 11 as a fixed end, and the brake lever 12 is pivotally connected to the actuating lever 15'. In the above, it is pivoted with the actuating rod 15' as a fixed end. The advantage of this design is that the first cylinder 11 of the first brake master cylinder 1' can be directly modified and used directly with the conventional non-linked brake function, without additional adjustment of the hole position and the locking mode, thereby reducing the extra opening. Modular cost, reducing overall expenses.

Please refer to FIG. 13 and FIG. 14 , which are respectively a first actuation diagram and a second actuation diagram of a linkage braking system with a first brake master cylinder and a second brake master cylinder according to a third embodiment of the present invention. As shown in FIG. 13, when the first brake lever 12 is operated, since the rebound spring 211 of the second brake master cylinder 2 is larger than the first spring 16 in the first brake master cylinder 1', the actuating lever 15' The reaction force of the sleeve 81 is rotated by the first pivot point 111, so that the first pushing portion 152 pushes the first plunger 13 to reduce the space of the first oil chamber 14 and send a hydraulic pressure to the first brake caliper 3 Generate braking force. As shown in FIG. 14, when the first brake lever 12 continues to apply force, the first brake lever 12 will rotate with the second pivot point 112', and the rebound spring 211 will be pulled by the inner wire 82. The arm 25 is compressed, so that the second brake master cylinder 2 sends a hydraulic pressure to the second brake caliper 4 to generate the braking force, thereby achieving the purpose of linkage braking.

Please refer to FIG. 15 and FIG. 16 , which are respectively a structural view and a partial cross-sectional view of a linked brake system with a first brake master cylinder and a drum brake mechanism according to a fourth embodiment of the present invention. The figure shows a linkage braking system comprising a first brake master cylinder 1' and a drum brake mechanism 9 for respectively braking the brake systems of the front and rear wheels, or interlocking the brake systems for the front and rear wheels.

The structural features of the first brake master cylinder 1' are basically the same as those of the third embodiment, and will not be described again here. The only difference is that the other wheel train of the embodiment selects the drum brake mechanism 9, which includes A vehicle arm 91, a rebound spring 911 and a fixing portion 90 are provided. The brake wire 8 includes a sleeve 81 and an inner wire 82 extending through the sleeve 81. One end of the sleeve 81 is fixed on the actuating rod 15', and the other end is fixed on the fixing portion 90. One end of the inner wire 82 is connected to the first brake lever 12, and the other end is connected to the brake arm 91 for forming the interlocking brake system. In this embodiment, the rebound spring 911 is interposed between the brake arm 91 and the fixed portion 90 such that the brake arm 91 is positioned in a direction by a rebound spring 911 when the brake arm 91 resists the rebound spring. When the elastic force of the 911 is activated, the drum brake mechanism 9 can generate the braking force.

Please refer to FIG. 17 and FIG. 18 , which are respectively a first actuation diagram and a second actuation diagram of a linkage braking system with a first brake master cylinder and a drum brake mechanism according to a fourth embodiment of the present invention. As shown in FIG. 17, when the first brake lever 12 is operated, since the elastic force of the first spring 16 is greater than the elastic force of the rebound spring 911, the brake arm 91 will be pulled by the inner wire 82 to resist the spring force of the rebound spring 911. When the drum brake device 9 will generate the braking force; as shown in FIG. 18, when the first brake lever 12 continues to act, the actuating lever 15' will push the first plunger 13 against the elastic force of the first spring 16, so that the first The oil chamber 14 is reduced in space and the oil pressure is sent to the first brake caliper 3 to generate the braking force, thereby achieving the purpose of interlocking the vehicle.

According to the configuration of the above four embodiments, in addition to integrating the conventional balance member and the pressing member into a single member, the mechanism is simplistic, and at the same time, the brake wire of the present invention can be directly connected to the actuating lever and the brake lever. Therefore, the installation of the brake wire fixing seat added to the outside of the brake pump cylinder can be omitted, which is beneficial to the overall space configuration.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

1,1’‧‧‧First brake master cylinder

11‧‧‧First cylinder

111‧‧‧First pivot point

112,112’‧‧‧Second pivot point

12‧‧‧First brake lever

13‧‧‧First plunger

14‧‧‧First Oil Room

15,15’‧‧‧Action rod

151,251‧‧‧ wire holder

152‧‧‧ first push

16‧‧‧First spring

2‧‧‧Second brake master cylinder

21‧‧‧Second cylinder

211‧‧‧Rebound spring

22‧‧‧Second brake lever

221‧‧‧ Third pivot point

23‧‧‧Second plunger

24‧‧‧Second oil room

25‧‧‧First rocker

26‧‧‧Second spring

27‧‧‧Second rocker

3‧‧‧First brake caliper

4‧‧‧Second brake calipers

6‧‧‧The first brake pipe

7‧‧‧Second brake hose

8‧‧‧ brake wire

81‧‧‧ casing

82‧‧‧ inside line

9‧‧‧Drum brake mechanism

90‧‧‧ Fixed Department

91‧‧‧煞车臂

911‧‧‧Rebound spring

930‧‧‧Front wheel brake device

931‧‧‧ Front wheel brake

933‧‧‧ calipers

934‧‧‧Hydraulic piping

940‧‧‧Rear wheel brake device

941‧‧‧ rear wheel brake

943‧‧‧ calipers

944‧‧‧Hydraulic piping

952‧‧‧Master cylinder

953‧‧‧ Pressing members

960‧‧‧Left brake lever

962‧‧‧Master cylinder

963‧‧‧ Pressing members

970‧‧‧balancer

975‧‧‧ brake wire

98‧‧‧ brake wire holder

1 is a structural diagram of a linked brake system with a first brake master cylinder and a second brake master cylinder according to a first embodiment of the present invention. Figure 2 is a side view of the direction A of Figure 1. 3 is a cross-sectional view of the interlocking brake system of the first brake master cylinder and the second brake master cylinder according to the first embodiment of the present invention. 4 is a first actuating diagram of a linked brake system with a first brake master cylinder and a second brake master cylinder according to a first embodiment of the present invention. Figure 5 is a second actuating diagram of the linked brake system of the first brake master cylinder and the second brake master cylinder according to the first embodiment of the present invention. 6 is a structural diagram of a linked brake system with a first brake master cylinder and a drum brake mechanism according to a second embodiment of the present invention. Figure 7 is a partial cross-sectional view showing the interlocking brake system of the first brake master cylinder and the drum brake mechanism according to the second embodiment of the present invention. 8 is a first actuating diagram of a linked brake system with a first brake master cylinder and a drum brake mechanism according to a second embodiment of the present invention. 9 is a second actuating diagram of a linked brake system with a first brake master cylinder and a drum brake mechanism according to a second embodiment of the present invention. Figure 10 is a first actuating diagram of a linked brake system with a first brake master cylinder and a second brake master cylinder in accordance with a third embodiment of the present invention. Figure 11 is a side view of the B direction of Figure 10. Figure 12 is a cross-sectional view showing the B-B of the interlocking brake system of the first brake master cylinder and the second brake master cylinder according to the third embodiment of the present invention. Figure 13 is a first actuating diagram of a linked brake system with a first brake master cylinder and a second brake master cylinder in accordance with a third embodiment of the present invention. Figure 14 is a second actuating diagram of a linked brake system with a first brake master cylinder and a second brake master cylinder in accordance with a third embodiment of the present invention. Figure 15 is a structural diagram of a linked brake system with a first brake master cylinder and a drum brake mechanism according to a fourth embodiment of the present invention. Figure 16 is a partial cross-sectional view showing the interlocking brake system of the first brake master cylinder and the drum brake mechanism according to the fourth embodiment of the present invention. Figure 17 is a first actuating diagram of a linked brake system with a first brake master cylinder and a drum brake mechanism in accordance with a fourth embodiment of the present invention. Figure 18 is a second actuating diagram of a linked brake system with a first brake master cylinder and a drum brake mechanism in accordance with a fourth embodiment of the present invention. Figure 19 is a configuration diagram of a conventional linkage brake system.

Claims (4)

A brake master cylinder for a linked brake system, comprising: a first brake master cylinder comprising a first cylinder block, a first brake lever, an actuating lever and a brake wire, the first cylinder body having a first An oil chamber, a first plunger and a first spring, the first brake lever is pivotally connected to the first cylinder, the actuating lever is pivotally connected to the first cylinder, and one end of the operating rod has a a first pushing portion for urging the first plunger; wherein the brake wire includes a sleeve and an inner wire disposed in the sleeve, and one end of the sleeve is fixed on the actuating rod One end of the inner wire is connected to the first brake lever. A brake master cylinder for a linked brake system, comprising: a first brake master cylinder comprising a first cylinder block, a first brake lever, an actuating lever and a brake wire, the first cylinder body having a first An oil chamber, a first plunger and a first spring, the actuating rod is pivotally connected to the first cylinder, the first brake lever is pivotally connected to the actuating rod, and one end of the actuating rod has a first a pushing portion for urging the first plunger; wherein the brake wire includes a sleeve and an inner wire disposed in the sleeve, and one end of the sleeve is fixed on the actuating rod, the inner thread One end is connected to the first brake lever. For example, the brake master cylinder for the linked brake system of claim 1 or 2, wherein the linkage brake system further comprises a second brake master cylinder comprising a second cylinder and a second brake lever a first rocker arm and a second rocker arm, the second cylinder body has a second oil chamber, a second plunger and a second spring, the second brake lever, the first rocker arm and the first The second rocker arm is pivotally connected to the second cylinder, a rebound spring is disposed between the first rocker arm and the second cylinder, and the second rocker has a second pushing portion for resisting the And a second plunger; wherein the other end of the sleeve is fixed on the second cylinder, and the other end of the inner line is connected to the first rocker arm to form the linkage braking system. For example, the brake master cylinder for the linked brake system of claim 1 or 2, wherein the linkage brake system further comprises a drum brake mechanism comprising a brake arm, a rebound spring and a fixing portion The other end of the sleeve is fixed to the fixing portion, and the other end of the inner line is connected to the rocker arm for forming the linkage braking system.