TWI582007B - Linked brake system - Google Patents

Description

Linked brake system

The invention relates to a linkage braking system, in particular to a linkage braking system suitable for a locomotive.

The conventional technology, such as the linked brake system disclosed in Taiwan Patent Publication No. M496697, please refer to FIG. 4 to FIG. 6 , which are respectively a configuration diagram of a conventional linkage brake system, a first actuation diagram of a linked brake, and a linkage of a brake. Two actuating pictures. As shown in FIG. 4, the structure of the conventional linkage brake system includes: a first brake operating device 91, a second brake operating device 92, a drum brake mechanism 94, a brake master cylinder 93, and a brake caliper 974. A first brake wire 951, a second brake wire 961 and a brake oil cup 971.

The first brake operating device 91 and the second brake operating device 92 are disposed on a frame 98. The first brake operating device 91 has a first fixing frame 912 and a first brake pivotally connected to the first fixing frame 912. The second brake operating device 92 has a second fixing frame 922 and a second brake lever 921 pivotally connected to the second fixing frame 922. In addition, the drum brake mechanism 94 includes a drum head body 942, a drum rebound spring 943, and a brake arm 941 and a punching portion 944 disposed on the drum bowl body 942. The drum spring rebound spring 943 is sleeved. Provided between the brake arm 941 and the drum head body 942, the through hole portion 944 has a brake wire device hole 9441. Wherein, when the braking arm 941 is rotated, a braking force is generated inside the drum braking mechanism 94, and a restoring force is provided through the drum spring rebound spring 943 as a returning elastic device after the braking arm 941 is rotated. .

The brake master cylinder 93 includes a cylinder 931, a plunger 932, an oil chamber 9312, an oil inlet 9311, an oil outlet 9131, a cylinder spring 933, and a pivot point 9316 of the cylinder 931. The heart rotates one of the rocker arms 934. The oil inlet 9311, the oil chamber 9312, and the oil outlet 9313 communicate with each other, and the plunger 932 is disposed in the cylinder 931, and can be used to control the volume change of the oil chamber 9312, and control both the oil chamber 9312 and the oil inlet 9311. Turn on or not. The cylinder spring 933 is disposed in the oil chamber 9312, one end of the cylinder 931 and the other end of the plunger 932, so that the oil chamber 9312 can maintain the maximum volume when the plunger 932 is free, and the oil inlet 9311 and The oil chamber 9312 maintains a passage. In addition, the oil inlet 9311 can be connected to the brake oil cup 971 by using a second brake oil pipe 972, and the oil outlet 9313 is connected with the brake caliper 974 by the first brake oil pipe 973 for controlling the oil pressure inside the brake caliper 974. The change allows the brake caliper 974 to operate normally. The brake oil cup 971, the first brake oil pipe 973, the oil inlet port 9311, the oil chamber 9312, the oil outlet port 9313, the second brake oil pipe 972, and the brake caliper 974 are all filled with hydraulic oil. When the brake caliper 974 is input with a hydraulic pressure, a braking force is generated.

The first brake wire 951 is sequentially disposed in the first wire sleeve 952 and the second wire sleeve 953 to form a first brake wire group. As shown in FIG. 4, the first brake wire 951 has one end and the first wire. The brake lever 911 is connected, and the other end is connected to the brake arm 941; and the first wire sleeve 952 is connected to the first fixing frame 912 at one end and the rocker arm hole 9341 of the rocker arm 934 is connected to the other end. The second wire sleeve 953 has one end connected to the cylinder through hole 9314 and the other end connected to the brake wire device hole 9441 of the through hole portion 944. In contrast, the second brake wire 961 is disposed in a third wire sleeve 962 to form a second brake wire set. As shown in FIG. 4, one end of the second brake wire 961 is connected to the second brake lever 921, and the other end is connected. The second cylinder bore 9315 of the cylinder 931 is connected, and the rocker arm 934 is passed through the rocker arm hole 934 for rotating the rocker arm 934; and the third wire sleeve 962 is connected to the second fixing frame 922 at one end and the rocker arm 934 at the other end. The rocker arm perforations 9342 are connected.

As shown in FIG. 5, when the first brake lever 911 is actuated, the brake arm 941 will be directly driven to rotate and pass through the first brake wire set (the first brake wire 951, the first wire bushing 952 and the second wire bushing). The action of 953) rotates the rocker arm 934 so that the plunger 932 is moved to the right by the thrust of one of the protrusions 9343 to change the volume of the oil chamber 9312, so that the volume of the oil chamber 9312 is reduced to establish the oil pressure, so that the brake caliper 974 Produce a brake effect. In contrast, as shown in FIG. 6, when the second brake lever 921 is operated, the second brake wire set (the second brake wire 961 and the third wire bushing 962) will rotate the rocker arm 934, so that the plunger 932 is also subjected to One of the protrusions 9343 is displaced by the thrust, and the volume of the oil chamber 9312 is reduced to establish the oil pressure, so that the brake caliper 974 generates a braking effect.

However, the order of rotation of the rocker arm 934 and the brake arm 941 will depend on the spring balance of the cylinder spring 933 and the drum rebound spring 943 acting on the first brake wire 951 at the same time. If the drum spring 943 acts on the first brake wire 951 and the spring force is greater than the spring force of the cylinder spring 933 acting on the first brake wire set 951, when the brake lever 911 is actuated, the rocker arm 934 will be preferentially actuated to push the plunger 932. Therefore, the brake caliper 974 for the auxiliary brake is operated earlier than the drum brake mechanism 94 of the main brake, which is dangerous. Even when the drum spring rebound spring 943 acts on the first brake wire 951, the rocker arm 934 will still naturally act in a state where the brake lever 911 is not required to be actuated, so that the brake caliper 974 remains in a braking state for a long time and cannot be released. Braking, causing vehicle power loss. Therefore, in order to avoid the above phenomenon, the elastic force of the cylinder spring 933 acting on the first brake wire 951 must be greater than the elastic force of the drum spring rebound spring 943 acting on the first brake wire 951, so as to be normal, but due to the cylinder The elastic force of the body spring 933 is increased, so that when the second brake lever 921 drives the brake caliper 974 to be operated alone, an additional force must be applied to achieve the original braking force and reduce the safety of the vehicle.

Invented by this person, in the spirit of active invention, thinking about a linkage braking system that can solve the above problems, after several research experiments to complete the present invention.

The main object of the present invention is to provide a linked brake system for improving the effect of spring force when the main brake system (drumstick) and the secondary brake system (disc) are connected in the conventional linkage brake system. The problem that the second brake system is in danger in the starting sequence or the force application state is dangerous, and a more reliable linkage braking system is constructed.

In order to achieve the above object, the linked brake system of the present invention is disposed on a locomotive, including a first brake operating device, a second brake operating device, a drum brake mechanism, a brake master cylinder, a brake caliper, and a first A brake wire and a second brake wire.

The first brake operating device includes a first fixing frame and a first brake lever pivotally connected to the first fixing frame; the second brake operating device includes a second fixing frame and is pivotally connected to the second fixing frame. A second brake lever.

The drum brake mechanism comprises a drum bowl body, a drum rebound spring and a brake arm and a perforated portion disposed on the drum tray body, and the drum rebound spring is sleeved on the brake arm and the drum bowl body. The perforated portion has a brake wire device hole.

The brake master cylinder includes a cylinder block, a plunger, an oil chamber, a cylinder spring connecting the cylinder block and the plunger, and three rocker arms pivotally connected to the cylinder block. The three rocker arms are a first rocker arm and a rocker arm. a second rocker arm and a third rocker arm, the first rocker arm has a protrusion for abutting the plunger, the second rocker arm has a second rocker arm perforation and a first one for abutting the first rocker arm An auxiliary spring is interposed between the second rocker arm and the cylinder block, and the third rocker arm has a third rocker arm perforation and a second abutting portion for abutting the first rocker arm. The brake caliper is connected to one of the oil outlets of the oil chamber via a first brake oil pipe.

The two ends of the first brake wire are respectively connected to the first brake lever and the brake arm, and pass through the second rocker arm through the second rocker arm; the second brake wire is connected to the second brake lever and the brake The pump is connected to the third rocker arm through the third rocker arm.

With the above design, the second brake wire of the present invention operates the disc brake system separately, and the first brake wire is operated with the interlocking disc and drum brake system. In addition, through the improved rocker arm structure, the single rocker arm of the original design is replaced by the first rocker arm, the second rocker arm and the third rocker arm pivotally connected to the cylinder body, and the linkage relationship between the three rocker arms is utilized. In order to reduce the adverse effects caused by the spring action between the disc and the drum system, and optimize the use efficiency of the interlocking brake system, the conventional patent M496697 has better linkage effect.

The cylinder block further includes a limiting slot, and the second rocker arm further includes a limiting portion, so that the limiting portion can be received in the limiting slot. Thereby, the rotation angle of the second rocker arm is limited by the limit of the rotation limit position of the limiting groove and the limiting portion, and the rotation angle is reduced to avoid excessively pushing against the first rocker arm.

The above-described linked brake system may further include a brake oil cup that communicates with one of the oil inlets of the oil chamber via a second brake oil pipe. Thereby, the brake oil cup can form an oil inlet passage with the oil inlet port and the second brake oil pipe for the brake oil flowing therein.

The first brake wire can be sequentially disposed in a first wire sleeve and a second wire sleeve. The first wire sleeve can be sleeved between the first holder and the second rocker arm, and the second wire sleeve can be sleeved between the cylinder and the perforated portion. Alternatively, the first wire sleeve may be sleeved between the first holder and the cylinder according to different wire laying manners, and the second wire sleeve may be disposed between the second rocker arm and the perforated portion.

The second brake wire can be threaded into a third wire sleeve. The third wire sleeve can be sleeved between the second fixing frame and the third rocker arm. Alternatively, the third wire sleeve may be sleeved between the second fixing frame and the cylinder according to different wire laying manners.

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, which is a configuration diagram of a linkage braking system according to a preferred embodiment of the present invention. The interlocking brake system of the present embodiment can be assembled on a locomotive. The main components of the linked brake system include: a first brake operating device 1, a second brake operating device 2, a drum brake mechanism 4, and a brake master. The pump 3, a brake caliper 74, a first brake wire 51, a second brake wire 61, and a brake oil cup 71.

The first brake operating device 1 and the second brake operating device 2 are disposed on a frame 8 . The first brake operating device 1 has a first mounting bracket 12 and a first brake pivotally connected to the first mounting bracket 12 . The second brake operating device 2 has a second fixing frame 22 and a second brake lever 21 pivotally connected to the second fixing frame 22 . In addition, the drum brake mechanism 4 includes a drum bowl body 42, a drum rebound spring 43 and a brake arm 41 and a perforated portion 44 disposed on the drum bowl body 42, and the drum spring rebound spring 43 sleeve Provided between the brake arm 41 and the drum head body 42, the perforated portion 44 has a brake wire device hole 441. Wherein, when the brake arm 41 is rotated, a braking force is generated inside the drum brake mechanism 4, and a restoring force is provided through the drum spring rebound spring 43 as a returning elastic device after the brake arm 41 is rotated. .

On the other hand, the brake master cylinder 3 includes a cylinder block 31, a plunger 32, an oil chamber 312, an oil inlet port 311, an oil outlet port 313, a cylinder spring 33, and a cylinder block 31. One of the first rocker arm 35, a second rocker arm 36 and a third rocker arm 37. The oil inlet 311, the oil chamber 312, and the oil outlet 313 communicate with each other, and the plunger 32 is disposed in the cylinder 31, and can be used to control the volume change of the oil chamber 312, and control both the oil chamber 312 and the oil inlet 311. Turn on or not. The cylinder spring 33 is disposed in the oil chamber 312, one end of the cylinder 31 and the other end of the plunger 32, so that the oil chamber 312 can maintain the maximum volume when the plunger 32 is in a free state, and the oil inlet 311 and The oil chamber 312 maintains a passage. In addition, the oil inlet 311 can be connected to the brake oil cup 71 by using a second brake oil pipe 72. Sometimes, in order to save cost, the brake oil cup 71 can be directly disposed on the oil inlet 311. In contrast, the oil outlet 313 is connected to the brake caliper 74 by the first brake oil pipe 73 for controlling the oil pressure change inside the brake caliper 74, so that the brake caliper 74 can be normally operated. The brake oil cup 71, the first brake oil pipe 73, the oil inlet 311, the oil chamber 312, the oil outlet 313, the second brake oil pipe 72, and the brake caliper 74 are filled with hydraulic oil.

In this embodiment, the first rocker arm 35, the second rocker arm 36, and the third rocker arm 37 are pivotally connected to the same pivoting point 316 of the cylinder block 31 and rotated, but not limited thereto. A plurality of pivot points are used, which are individually pivoted to the cylinder block 31. The first rocker arm 35 has a protrusion 351 that interferes with the plunger 32 for a long time. When the first rocker arm 35 rotates, the protrusion 351 moves the plunger 15 to change the volume of the oil chamber 312. In addition, the second rocker arm 36 has a second rocker arm through hole 361, a first abutting portion 362 and a limiting portion 363. The first abutting portion 362 can push the first rocker arm 35 to rotate when the second rocker arm 36 rotates, thereby driving the plunger 32 to be displaced. The limiting portion 363 is disposed in the limiting slot 317 of the cylinder block 31, so that the rotation angle of the second rocker arm 36 is limited by the limit of the rotation limit position of the limiting slot 317 and the limiting portion 363, and the rotation is reduced. Angle, avoid excessive pushing against the first rocker arm 35. Furthermore, the first brake wire 51 passes through the second rocker arm through hole 361, a first cylinder body through hole 314 side, and is wrapped in the first wire bushing 52 and a second wire bushing 53 to become a first Brake wire set. Furthermore, an auxiliary spring 38 interposed between the second rocker arm 36 and the first cylinder block 31 applies a spring force to the second rocker arm 36 for a long time, so that the limiting portion 363 of the second rocker arm 36 can It is in contact with one side of the limiting slot 317. In this embodiment, one end of the first brake wire 51 is connected to the first brake lever 11 , and sequentially passes through the second rocker arm through hole 361 and the first cylinder hole through hole 314 , and the end thereof is connected with the brake arm 41 , and the second link is connected. Rocker arm 36. At this time, one end of the first wire bushing 52 is connected to the first fixing frame 12, and the other end is connected to the second rocker arm hole 361. One end of the second wire bushing 53 is connected to the cylinder hole through hole 314, and the other end is connected with the punching portion. The brake wire device hole 441 of the 44 is connected. Alternatively, according to another embodiment (not shown) in which the first brake wire 51 is connected in a different connection relationship, if one end of the first brake wire 51 is connected to a brake lever 11, the first cylinder bore 314 is sequentially passed through. And a second rocker arm through hole 361, the end of which is connected to the brake arm 41, and the second rocker arm 36 is interlocked. At this time, one end of the first wire bushing 52 is connected to the first fixing frame 12, and the other end is connected to the cylinder hole 314 of the cylinder block 31. One end of the second wire sleeve 53 is connected to the second rocker arm hole 361 of the second rocker arm 36, and the other end is connected to the brake wire device hole 441 of the punching portion 44. Thereby, in addition to pulling the brake arm 41 through the first brake wire 51 to cause the drum brake mechanism 4 to generate the braking force, the biasing force can be applied to the second rocker arm 36 through the arrangement of the wire sleeves 52, 53 and The first rocker arm 35 urges the plunger 32 to be displaced.

On the other hand, the third rocker arm 37 has a third rocker arm hole 371 and a second abutting portion 372. The second abutting portion 372 can push the first rocker arm 35 when the third rocker arm 37 rotates. Rotating, thereby driving the plunger 32 to generate displacement, wherein the second brake wire 61 passes through one of the third rocker arm perforations 371 of the third rocker arm 37 and one of the second cylinder bores 315 of the cylinder block 31, the end thereof It is fixed on the brake master cylinder 3 and is wrapped in a third wire sleeve 62 to form a second brake wire set. In this embodiment, one end of the second brake wire 61 is connected to the second brake lever 21, and after passing through the third rocker arm hole 371, the end is connected with the second cylinder hole 315 of the cylinder block 31, and is linked to the third. Rocker arm 37. At this time, one end of the third wire bushing 62 is connected to the second fixing frame 22, and the other end is connected to the third rocker arm hole 371 of the third rocker arm 37. Alternatively, according to another embodiment (not shown) in which the second brake wire 61 is connected in a different connection relationship, if one end of the second brake wire 61 is connected to the second brake lever 21, the second cylinder hole is pierced therein. After 315, the end is connected to the third rocker arm hole 371 of the third rocker arm 37, and the third rocker arm 37 is interlocked. At this time, one end of the third wire bushing 62 is connected to the second fixing frame 22, and the other end is connected to the second cylinder hole 315 of the cylinder block 31. Thereby, the urging force is relatively applied to the third rocker arm 37 and the first rocker arm 35 through the arrangement of the second brake wire 61 and the third wire bushing 62, thereby causing displacement of the plunger 32.

Next, please refer to FIG. 2, which is a first actuating diagram of a linked brake of a linked brake system according to a preferred embodiment of the present invention. As shown, when the first brake lever 11 is actuated, the sum of the elastic forces applied to the first brake wire 51 by the cylinder spring 33 and the auxiliary spring 38 is greater than the spring force applied by the drum rebound spring 43 to the first brake wire 51. Therefore, the first brake wire 51 will preferentially pull the brake arm 41 to rotate, so that the drum brake mechanism 4 generates the braking force. However, as the urging force of the first brake lever 11 increases, when the occupant's urging force to the first brake lever 11 is greater than the sum of the elastic forces of the cylinder spring 33 and the auxiliary spring 38 applied to the first brake wire 51, this When the second rocker arm 36 will start to rotate, the first abutting portion 362 will push the first rocker arm 35 to rotate, so that the protruding portion 351 of the first rocker arm 35 can push the plunger 32, and the oil chamber 312 is established due to the volume reduction. The oil pressure causes the brake caliper 74 to generate the interlocking action of the auxiliary brake. Then, when the second rocker arm 36 continues to rotate due to the increase of the force applied by the first brake lever 11, the limiting portion 363 of the second rocker arm 36 will contact the other side of the limiting slot 317 to limit the second shaking. The arm 36 continues to rotate. At this time, the first brake lever 11 continues to apply force to increase the braking force only to the drum brake mechanism 4, so as to avoid excessive force applied to the brake caliper 74 of the auxiliary brake, thereby causing the risk of slipping when the brake is connected. Moreover, the limiting slot 317 limits the continuous rotation of the second rocker arm 36, and can also prevent the normal operation of the drum brake mechanism 4 if the brake oil passage leaks.

Please refer to FIG. 3, which is a second actuating diagram of the interlocking brake of the linked brake system according to a preferred embodiment of the present invention. As shown, when the second brake lever 21 is operated, the second brake wire set (the second brake wire 61 and the third wire bushing 62) will rotate the third rocker arm 37, and the second rocker arm 37 will be second. The urging portion 372 will push the first rocker arm 35 to rotate, so that the plunger 32 is displaced by a thrust, and the oil chamber 312 is reduced in volume to establish the oil pressure, so that the brake caliper 74 generates a braking effect. Further, since the spring force of the cylinder spring 33 is smaller than that of the prior art, the braking force generated by the second brake lever 21 is not consumed by the interlocking brake.

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.

1,91‧‧‧First brake operating device
11,911‧‧‧The first brake lever
12,912‧‧‧First mount
2,92‧‧‧Second brake operating device
21,921‧‧‧Second brake lever
22,922‧‧‧Second holder
3,93‧‧‧ brake master cylinder
31,931‧‧‧ cylinder
311,9311‧‧‧ inlet
312,9312‧‧ Oil room
313,9313‧‧‧ oil outlet
314, 9314‧‧‧ first cylinder perforation
315,9315‧‧‧Second cylinder perforation
316,9316‧‧‧ pivot point
317‧‧‧ Limit slot
32,932‧‧‧Plunger
33,933‧‧‧Cylinder springs
35‧‧‧First rocker arm
351‧‧‧Protruding
36‧‧‧Second rocker
361‧‧‧Second rocker piercing
362‧‧‧First Incentive Department
363‧‧‧Limited
37‧‧‧ Third rocker arm
371‧‧‧ Third rocker piercing
372‧‧‧Second Rushing Department
38‧‧‧Auxiliary spring
4,94‧‧‧Drum brake mechanism
41,941‧‧‧煞车臂
42,942‧‧‧ drumstick body
43,943‧‧‧Drumstick rebound spring
44,944‧‧‧Perforated Department
441,9441‧‧‧煞Car wire device hole
51,951‧‧‧The first brake wire
52,952‧‧‧First wire casing
53,953‧‧‧Second wire casing
61,961‧‧‧Second brake wire
62,962‧‧‧3rd wire casing
71,971‧‧‧煞车油杯
72,972‧‧‧Second brake hose
73,973‧‧‧The first brake pipe
74,974‧‧‧ brake calipers
8,98‧‧‧ frame
934‧‧‧ rocker arm
9341‧‧‧ rocker piercing
9342‧‧‧Rocking arm piercing
9343‧‧‧Protruding

1 is a configuration diagram of a linked brake system according to a preferred embodiment of the present invention. 2 is a first actuating diagram of a linked brake of a linked brake system in accordance with a preferred embodiment of the present invention. 3 is a second actuating diagram of a linked brake of a linked brake system in accordance with a preferred embodiment of the present invention. Figure 4 is a configuration diagram of a conventional linkage brake system. Fig. 5 is a first actuating diagram of a linked brake of a conventional linkage brake system. Fig. 6 is a second actuating diagram of the linked brake of the conventional linkage brake system.

1‧‧‧First brake operating device

11‧‧‧First brake lever

12‧‧‧First mount

2‧‧‧Second brake operating device

21‧‧‧Second brake lever

22‧‧‧Second holder

3‧‧‧ brake master cylinder

31‧‧‧Cylinder

311‧‧‧ inlet port

312‧‧‧ oil room

313‧‧‧ Oil outlet

314‧‧‧First cylinder perforation

315‧‧‧Second cylinder perforation

316‧‧‧ pivot point

317‧‧‧ Limit slot

32‧‧‧Plunger

33‧‧‧Cylinder spring

35‧‧‧First rocker arm

351‧‧‧Protruding

36‧‧‧Second rocker

361‧‧‧Second rocker piercing

362‧‧‧First Incentive Department

363‧‧‧Limited

37‧‧‧ Third rocker arm

371‧‧‧ Third rocker piercing

372‧‧‧Second Rushing Department

38‧‧‧Auxiliary spring

4‧‧‧Drum brake mechanism

41‧‧‧煞车臂

42‧‧‧Drumstick body

43‧‧‧Drumstick rebound spring

44‧‧‧Perforated Department

441‧‧‧煞Car wire device hole

51‧‧‧First brake wire

52‧‧‧First wire casing

53‧‧‧Second wire casing

61‧‧‧Second brake wire

62‧‧‧ Third wire casing

71‧‧‧煞车油杯

72‧‧‧Second brake hose

73‧‧‧The first brake pipe

74‧‧‧ brake calipers

8‧‧‧ frame

Claims (10)

A locomotive brake system is provided on a locomotive, comprising: a first brake operating device comprising a first fixing frame and a first brake lever pivotally connected to the first fixing frame; a second brake operating device, The utility model comprises a second fixing frame and a second brake lever pivotally connected to the second fixing frame; a drum brake mechanism comprising a drum head body, a drum rebound spring and a drum cartridge body a brake arm and a punching portion, the drum spring spring is sleeved between the brake arm and the drum body, the punching portion has a brake wire device hole; and a brake master cylinder includes a cylinder a body, a plunger, an oil chamber, a cylinder spring connecting the cylinder and the plunger, and a rocker arm pivotally connected to the cylinder, the three rocker arms being a first rocker arm and a second a rocker arm and a third rocker arm, the first rocker arm has a protrusion for abutting the plunger, the second rocker arm has a second rocker arm perforation and a member for abutting the first rocker arm a first abutting portion, and an auxiliary spring is interposed between the second rocker arm and the cylinder block, The third rocker arm has a third rocker arm perforation and a second abutting portion for abutting the first rocker arm; a brake caliper through a first brake oil pipe and one of the oil chamber outlets Connected to each other; a first brake wire, the two ends of which are respectively connected to the first brake lever and the brake arm, and pass through the second rocker arm perforation to interlock the second rocker arm; and a second brake wire, The two ends of the second brake lever and the brake master cylinder are respectively connected to the second rocker arm and the third rocker arm is coupled to the third rocker arm. The linked brake system of claim 1, wherein the cylinder further comprises a limit slot. The interlocking brake system of claim 2, wherein the second rocker arm further comprises a limiting portion, wherein the limiting portion is received in the limiting slot. For example, the linked brake system of claim 1 includes a brake oil cup that communicates with an oil inlet of one of the oil chambers via a second brake oil pipe. The linked brake system of claim 1, wherein the first brake wire is sequentially disposed in a first wire bushing and a second wire bushing. The interlocking brake system of claim 5, wherein the first wire sleeve is sleeved between the first fixing frame and the second rocker arm, and the second wire bushing is sleeved on the cylinder body Between the perforations. The interlocking brake system of claim 5, wherein the first wire bushing is sleeved between the first fixing frame and the cylinder block, and the second wire bushing is sleeved on the second rocker arm Between the perforations. The interlocking brake system of claim 1, wherein the second brake wire is disposed in a third wire bushing, and the third wire bushing is sleeved on the second fixing frame and the brake master cylinder between. The interlocking brake system of claim 8, wherein the third wire sleeve is sleeved between the second fixing frame and the third rocker arm. The interlocking brake system of claim 8, wherein the third wire sleeve is sleeved between the second fixing frame and the cylinder block.