A CBS linkage structure and a motorcycle using the same

Abstract

The present invention relates to the field of vehicle control technology, and in particular to a CBS linkage structure and a motorcycle employing the same. The CBS linkage structure includes a valve body, wherein a first and second oil passages and a plunger cavity are provided within the valve body; the plunger cavity is connected to the first and second oil passages; the plunger cavity divides the first oil passage into an upper oil passage and a lower oil passage, a plunger is provided within the plunger cavity, and an auxiliary oil passage and a pressure-reducing oil passage are separated on the valve body at the bottom of the upper oil passage; a one-way oil seal is provided on the plunger within the plunger cavity, and a reset spring is provided within the plunger cavity outside the plunger; the plunger has a first position and a second position in response to the oil pressure within the second oil passage and the reset spring; when the plunger is in the first position, the pressure-reducing oil passage is connected to the plunger cavity inside the one-way oil seal and the lower oil passage; when the plunger is in the second position, the one-way oil seal blocks the pressure-reducing oil passage. The CBS linkage structure is easy to use and has excellent linkage braking effect.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, in particular to a CBS linkage structure and a motorcycle using the structure. Background Art

[0002] The braking system is the most critical active safety device to ensure the safe driving of motorcycles. Therefore, the basic requirement of a motorcycle braking system is: regardless of the speed, load, high or low adhesion coefficient road surface and climatic conditions of the motorcycle, it must ensure that the driver can achieve smooth and rapid deceleration of the vehicle until it stops through simple operations during the braking process.

[0003] Most existing two-wheeled motorcycles use independent front and rear wheel braking systems. To achieve reasonable deceleration during braking, motorcycles equipped with these systems must properly distribute hand and foot braking force so that the front and rear tires fully utilize the road's adhesion coefficient. However, in real life, it is difficult for users to brake both front and rear wheels simultaneously and distribute the force appropriately. For motorcycles, distributing braking force during braking based on a combination of factors, including the vehicle's load, the road's adhesion coefficient, and tire wear, is particularly important.

[0004] Under the premise of not changing the front and rear brake structures of the original vehicle and minimizing costs, achieving synchronous and linked braking of the front and rear wheels during braking has become a technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a CBS linkage structure and a motorcycle using the structure. The CBS linkage structure can ensure the shortest braking distance and stability without changing the original front and rear brake structures of the vehicle, thus solving the problems existing in the prior art.

[0006] The present invention is achieved through the following technical solutions:

[0007] A CBS linkage structure includes a valve body, in which a first oil passage, a second oil passage and a plunger cavity are provided;

[0008] The plunger cavity is connected to the first oil passage and the second oil passage; the plunger cavity divides the first oil passage into an upper oil passage and a lower oil passage. A plunger is provided in the plunger cavity, and an auxiliary oil passage and a pressure-reducing oil passage are separated on the valve body at the bottom of the upper oil passage. A one-way oil seal is provided on the plunger in the plunger cavity, and a reset elastic member is provided in the plunger cavity outside the plunger.

[0009] The plunger has a first position and a second position under the cooperation of the oil pressure in the second oil channel and the reset elastic member; when the plunger is in the first position, the pressure reducing oil channel is connected with the plunger cavity inside the one-way oil seal and the lower oil channel; when the plunger is in the second position, the one-way oil seal blocks the pressure reducing oil channel, and the auxiliary oil channel is connected with the plunger cavity outside the one-way oil seal and further connected with the plunger cavity inside the one-way oil seal and the lower oil channel through the one-way oil seal.

[0010] The first oil channel is used to connect the front master cylinder and the front slave cylinder; the second oil channel is used to connect the rear master cylinder and the rear slave cylinder.

[0011] The plunger cavity includes a first plunger cavity that cooperates with the outer side wall of the plunger and a limit cavity arranged in the middle of the first plunger cavity; a first boss is provided at the rear of the plunger, and the reset elastic member is provided between the first boss and the inner side wall of the rear end of the limit cavity; a second boss is provided at the front of the plunger, and the second boss is abutted against the inner side wall of the front end of the limit cavity under the action of the reset elastic member; a third boss is provided on the outer side of the second boss, and the one-way oil seal is provided on the outer side wall of the plunger between the first boss and the third boss.

[0012] The plunger cavity (3) comprises a first plunger cavity (3.1) and a second plunger cavity (3.3); the front portion of the plunger cooperates with the first plunger cavity, and the second plunger cavity is arranged corresponding to the first oil passage; an opening is provided on the rear side wall of the valve body corresponding to the second plunger cavity, a sealing member is provided on the opening for sealing, and a reset elastic member is provided between the sealing member and the rear end face of the plunger; an exhaust hole connected to the second plunger cavity is also provided on the valve body outside the first oil passage, and an exhaust member is provided on the exhaust hole; a second boss (5) is provided on the plunger, and the second boss abuts against the inner side wall of the front end of the second plunger cavity under the action of the reset elastic member; a one-way oil seal is provided on the plunger in the second plunger cavity.

[0013] The blocking piece is a screw plug; the exhaust piece is an exhaust screw.

[0014] A first oil seal is provided in the first plunger cavity.

[0015] The reset elastic member is a reset spring.

[0016] A first oil seal and a second oil seal are respectively provided between the first plunger cavity and the plunger on both sides of the limiting cavity.

[0017] The first oil seal and the second oil seal are respectively arranged on the inner side wall of the first plunger cavity; or, the first oil seal and the second oil seal are respectively arranged on the outer side wall of the plunger.

[0018] A first oil seal is provided between the front of the plunger and the inner wall of the plunger cavity, and the first oil seal is provided on the inner wall of the plunger cavity; a second oil seal is provided between the rear of the plunger and the plunger cavity, and the second oil seal is provided on the outer wall of the plunger.

[0019] The valve body is a split structure, and the split structure valve body is fixed by threaded fasteners.

[0020] The split valve body includes a first valve body and a second valve body, which are fixedly connected by bolts. The second oil passage and the front portion of the plunger cavity are provided on the first valve body; the middle and rear portions of the first oil passage and the plunger cavity are provided on the second valve body.

[0021] The inner diameter of the limiting cavity is larger than the inner diameter of the first plunger cavity. This structure facilitates the arrangement of the one-way oil seal and the return spring.

[0022] The return spring is sleeved on the plunger.

[0023] The front end of the return spring abuts against the rear side of the first boss, and the rear end of the return spring is fixedly connected to the rear end inner wall of the limiting cavity.

[0024] The one-way oil seal is a leather cup.

[0025] The leather cup is a plunger leather cup.

[0026] The first oil seal and the second oil seal are both bidirectional oil seals.

[0027] The pressure reducing oil channel is an oil channel with an inner diameter of 0.1-0.3 mm.

[0028] A motorcycle is equipped with the CBS linkage structure as described above.

[0029] The motorcycle is a motorcycle with an ABS anti-lock braking system.

[0030] An electric vehicle is equipped with the CBS linkage structure as described above.

[0031] Beneficial effects of the present invention:

[0032] This CBS linkage structure can be directly connected in series to the front and rear brake oil lines, eliminating the need to modify the original vehicle's front and rear brake structures. By changing the plunger's position, the one-way oil seal on the plunger opens or closes the pressure relief oil channel, thereby actuating the front wheel cylinder connected to the first oil channel to control front wheel braking, or simultaneously actuating the rear wheel cylinder connected to the second oil channel to control front and rear wheel braking. This CBS linkage structure is scientifically and rationally designed. Compared to existing CBS linkage systems, it eliminates the need for multiple oil lines and places no special requirements on the front brake calipers, reducing production costs and facilitating mass production and upgrade installation on existing vehicles. It also provides shorter braking distances and more stable braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of Example 1 of the present invention;

[0034] Figure 2 for Figure 1 A schematic diagram of the structure of the middle plunger in the second position;

[0035] Figure 3 This is a schematic structural diagram of Example 2 of the present invention;

[0036] Figure 4 This is a schematic structural diagram of Example 3 of the present invention;

[0037] Figure 5 This is a schematic structural diagram of Example 4 of the present invention;

[0038] Figure 6 This is a schematic structural diagram of Example 5 of the present invention;

[0039] Figure 7 This is a structural diagram of Example 6 of the present invention.

[0040] In the figure, 1 first oil channel, 1.1 upper oil channel, 1.2 lower oil channel, 1.11 auxiliary oil channel, 1.12 pressure reducing oil channel, 2 second oil channel, 3 plunger chamber, 3.1 first plunger chamber, 3.2 limit chamber, 3.3 second plunger chamber, 4 plunger, 5 second boss, 6 third boss, 7 first boss, 8 return spring, 9 leather cup, 10 first oil seal, 11 second oil seal, 12 front brake master cylinder, 13 rear brake master cylinder, 14 front brake disc, 15 rear brake disc, 16 ABS anti-lock braking system, 17 first valve body, 18 second valve body, 19 wire plug, 20 air bleed screw. DETAILED DESCRIPTION

[0041] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0042] Example 1

[0043] like Figure 1-2As shown, a CBS linkage pump body with a CBS linkage structure includes a valve body 1, which is connected in series between the front and rear brake oil pipes. A first oil channel 2, a second oil channel 3 and a plunger cavity 3 are provided in the valve body. The first oil channel, the second oil channel and the plunger cavity are connected. The plunger cavity 3 is provided in the middle of the first oil channel and is perpendicular to the second oil channel; the plunger cavity includes a first plunger cavity 3.1 and a limiting cavity 3.2 provided in the middle of the first plunger cavity, the limiting cavity 3.2 divides the first oil channel into an upper oil channel 1.1 and a lower oil channel 1.2, and two oil channels are opened on the valve body at the bottom of the upper oil channel 1.1, namely an auxiliary oil channel 1.11 and a pressure reducing oil channel 1.12, and the inner diameter of the pressure reducing oil channel is 0.1mm-0.5mm; the upper oil channel 1.1 is connected to the limiting cavity 3.2 via the auxiliary oil channel 1.11 and the pressure reducing oil channel 1.12. A plunger 4 is provided in the plunger cavity 3, and the plunger is matched with the first plunger cavity; a second boss 5, a third boss 6 and a first boss 7 are provided on the plunger in the limit cavity from front to back, and a return spring 8 is provided between the first boss and the inner side wall of the rear end of the limit cavity and is sleeved on the outside of the plunger. Under the action of the return spring, the second boss 5 abuts against the inner side wall of the front end of the limit cavity, and a one-way oil seal is provided on the outside of the plunger between the first boss and the third boss. The one-way oil seal is a leather cup 9, and the leather cup realizes one-way sealing with the inner side wall of the limit cavity. At this time, the plunger is in the initial position, that is, the first position. At this position, the leather cup is on the outside of the pressure reducing oil channel, so that the upper oil channel is connected with the limit cavity inside the leather cup through the pressure reducing oil channel. When the oil pressure in the second oil channel increases to a certain level, the left end of the plunger is pushed to move into the first plunger cavity, the return spring is compressed, and the leather cup blocks the pressure reducing oil channel. The oil pressure in the first oil channel enters the limit cavity on the outside of the leather cup through the auxiliary oil channel and the pressure reducing oil channel, and enters the limit cavity on the inside of the leather cup through the leather cup and then enters the lower oil channel. At this time, the oil pressures in the first oil channel and the second oil channel act on the sub-pumps connected to them respectively.

[0044] A first oil seal 10 and a second oil seal 11 are respectively installed in the first plunger cavity on either side of the stopper cavity. Both the first and second oil seals are bidirectional seals, ensuring the sealing of oil in the various oil passages during plunger movement. These first and second oil seals are located in grooves on the inner sidewalls of the first plunger cavity 3.1 on either side of the stopper cavity. This arrangement minimizes damage to the bidirectional seals during plunger installation.

[0045] During use, the inlet of first oil channel 2 is connected to the front master cylinder of the front wheel brake via the front brake oil pipe, and the outlet of first oil channel 2 is connected to the front slave cylinder of the front wheel brake via the front brake oil pipe. The inlet of second oil channel 3 is connected to the rear master cylinder of the rear wheel brake via the rear brake oil pipe, and the outlet of second oil channel 3 is connected to the rear slave cylinder of the rear wheel brake via the rear brake oil pipe. When the front brake is applied, the pressure from the front master cylinder enters the upper oil channel, pressure-reducing oil channel 1.12, the limit chamber inside the leather cup, and the lower oil channel through the front brake oil pipe connected to the outlet of the lower oil channel, applying pressure to the front slave cylinder to brake the vehicle. When the rear brake is applied, the pressure from the rear master cylinder enters the second oil channel 3 through the rear brake oil pipe, applying pressure to the rear slave cylinder to generate braking force. Simultaneously, the oil pressure in the second oil channel pushes plunger 4 to the right, causing leather cup 9 to pass through and block pressure-reducing oil channel 1.12, applying pressure to the front slave cylinder to brake the vehicle, thus completing the linked braking control. In the linkage state, the pressure on the front master cylinder is increased, and the brake fluid in the upper oil channel can enter the limit cavity 3.2 outside the leather cup through the auxiliary oil channel 1.11 and the pressure reducing oil channel 1.12, and then pass through the leather cup 9 and continue to enter the lower oil channel 1.2, continuing to apply pressure to the front wheel cylinder, so that the front wheel obtains greater braking force.

[0046] In the above embodiment 1, the first oil seal 10 and the second oil seal 11 can be fixed in a groove on the outer wall of the plunger, or the first oil seal is provided on the inner wall of the first plunger cavity and the second oil seal is provided on the outer wall of the plunger.

[0047] Example 2

[0048] like Figure 3As shown, a motorcycle brake system adopting a CBS linkage structure of embodiment 1 is shown. The brake system includes a CBS linkage structure and a front brake master cylinder 12, a front brake wheel cylinder, a rear brake master cylinder 13 and a rear brake wheel cylinder connected to the CBS linkage system. The front brake wheel cylinder is connected to the front brake disc 14 for braking the front wheel, and the rear brake wheel cylinder is connected to the rear brake disc 15 for braking the rear wheel; the CBS linkage structure includes a valve body 1, which is connected in series between the front and rear brake oil pipes, and a first oil channel 2, a second oil channel 3 and a plunger cavity 3 are provided in the valve body. The first oil channel, the second oil channel and The plunger chambers are connected, and the plunger chamber 3 is arranged in the middle of the first oil channel and is perpendicular to the second oil channel. The plunger chamber includes a first plunger chamber 3.1 and a limit chamber 3.2 arranged in the middle of the first plunger chamber. The limit chamber 3.2 divides the first oil channel into an upper oil channel 1.1 and a lower oil channel 1.2. Two oil channels are opened on the valve body at the bottom of the upper oil channel 1.1, namely an auxiliary oil channel 1.11 and a pressure reducing oil channel 1.12. The inner diameter of the pressure reducing oil channel is 0.1mm. The upper oil channel 1.1 is connected to the limit chamber 3.2 via the auxiliary oil channel 1.11 and the pressure reducing oil channel 1.12. A plunger 4 is provided in the plunger cavity 3, and the plunger is matched with the first plunger cavity; a second boss 5, a third boss 6 and a first boss 7 are provided on the plunger in the limit cavity from front to back, and a return spring 8 is provided between the first boss and the inner side wall of the rear end of the limit cavity and is sleeved on the outside of the plunger. Under the action of the return spring, the second boss 5 abuts against the inner side wall of the front end of the limit cavity, and a one-way oil seal is provided on the outside of the plunger between the first boss and the third boss. The one-way oil seal is a leather cup 9, and the leather cup realizes one-way sealing with the inner side wall of the limit cavity. At this time, the plunger is in the initial position, that is, the first position. At this position, the leather cup is on the outside of the pressure reducing oil channel, so that the upper oil channel is connected with the limit cavity inside the leather cup through the pressure reducing oil channel. After the oil pressure in the second oil channel increases, the left end of the plunger is pushed to move toward the first plunger cavity, the return spring is compressed, and the leather cup blocks the pressure reducing oil channel. The brake fluid in the first oil channel enters the limit cavity on the outside of the leather cup through the auxiliary oil channel and the pressure reducing oil channel, and enters the limit cavity on the inside of the leather cup through the leather cup and then enters the lower oil channel. At this time, the oil pressure in the first oil channel and the second oil channel acts on the slave cylinders connected to them respectively, thereby realizing the front brake disc and the rear brake disc braking the front and rear wheels together.

[0049] A first oil seal 10 and a second oil seal 11 are respectively installed in the first plunger cavity on either side of the limiter cavity. Both the first and second oil seals are bidirectional seals that ensure the sealing of oil in different oil passages during plunger movement. The first oil seal is located in a groove on the inner wall of the first plunger cavity 3.1 at the front of the limiter cavity, while the second oil seal is located in a groove on the outer wall at the rear of the plunger.

[0050] During operation, when the front brakes are applied, pressure from the front brake master cylinder (12) flows through the front brake oil pipe into the upper oil channel of the first oil channel. It then passes through the pressure-reducing oil channel (1.12), the limit chamber inside the rubber cup, and the lower oil channel, increasing pressure on the front wheel cylinder, causing the front brake disc to brake the front wheel. When the rear brakes are applied, pressure from the rear brake master cylinder (12) flows through the rear brake oil pipe and the second oil channel (3) to the rear wheel cylinder, causing the rear brake disc to apply braking force to the rear wheel. Simultaneously, the oil pressure in the second oil channel pushes plunger (4) to the right, compressing the return spring. The rubber cup (9) then passes through the pressure-reducing oil channel (1.12), closing the pressure-reducing oil channel (1.12) and continuing to apply pressure to the front wheel, completing the linked braking control. In the linked state, the front brake master cylinder continues to increase pressure. Brake fluid in the upper oil channel can then flow through the auxiliary oil channel (1.11), the pressure-reducing oil channel (1.12), and the rubber cup (9) to the limit chamber (3.2) directly connected to the lower oil channel, further applying pressure to the front wheel cylinder, providing greater braking force to the front wheel. After releasing the brake to reduce pressure, the return spring pushes the plunger back to its original position, the leather cup returns to its original position, the decompression channel is opened, and the brake pressure disappears.

[0051] Example 3

[0052] like Figure 4 As shown, this motorcycle braking system is the same as the motorcycle braking system of Example 2, except that it is equipped with an ABS anti-lock braking system 16. The front brake master cylinder is connected to the first oil channel inlet of the CBS linkage structure valve body via a pipeline, the rear brake master cylinder is connected to the second oil channel inlet of the CBS linkage structure valve body via a pipeline, the first oil channel outlet of the CBS linkage structure valve body is connected to the front wheel oil inlet of the ABS anti-lock braking system via a pipeline, the front wheel oil outlet of the ABS anti-lock braking system is connected to the front brake cylinder via a pipeline, the second oil channel outlet of the CBS linkage structure valve body is connected to the rear wheel oil inlet of the ABS anti-lock braking system via a pipeline, and the rear wheel oil outlet of the ABS anti-lock braking system is connected to the rear brake cylinder via a pipeline.

[0053] The use process is the same as that of embodiment 1 or 2. Since the ABS anti-lock braking system is installed, the motorcycle braking system avoids wheel locking during linked braking, making it safer.

[0054] The CBS linkage structure in the above embodiments is a split structure, such as Figure 1-2 As shown, the CBS linkage structure includes a first valve body 17 and a second valve body 18, which are fixedly connected by bolts; a sealing ring is provided at the connection between the first valve body and the second valve body.

[0055] Example 4

[0056] like Figure 5As shown, a CBS linkage pump body with a CBS linkage structure includes a valve body 1, which is connected in series between the front and rear brake oil pipes. A first oil channel 2, a second oil channel 3 and a plunger chamber 3 are provided in the valve body. The first oil channel, the second oil channel and the plunger chamber are arranged in communication. The plunger chamber 3 is arranged in the middle of the first oil channel and perpendicular to the second oil channel. The plunger chamber includes a first plunger chamber 3.1 and a second plunger chamber 3.3. The second plunger chamber 3.3 divides the first oil channel into an upper oil channel 1.1 and a lower oil channel 1.2. Two oil channels are opened on the valve body at the bottom of the upper oil channel 1.1, namely an auxiliary oil channel 1.11 and a pressure reducing oil channel 1.12. The inner diameter of the pressure reducing oil channel is 0.1mm-0.5mm. The upper oil channel 1.1 is connected to the second plunger chamber 3.3 via the auxiliary oil channel 1.11 and the pressure reducing oil channel 1.12. A plunger 4 is provided in the plunger cavity 3, and the plunger is matched with the first plunger cavity; a one-way oil seal is provided on the plunger in the second plunger cavity, and an opening is provided on the rear side wall of the valve body corresponding to the second plunger cavity 3.3, and a sealing member is sealed on the opening, and the sealing member is a wire plug 19, and a return spring 8 is provided between the sealing member and the rear end face of the plunger; an exhaust hole connected to the second plunger cavity is also provided on the valve body outside the first oil channel, and an exhaust screw 20 is matched with the exhaust hole; a second boss 5 is provided on the plunger, and the second boss is abutted against the inner wall of the front end of the second plunger cavity under the action of the return spring; a first oil seal 10 is provided in the first plunger cavity. Under the action of the return spring, the second boss 5 abuts against the inner wall of the front end of the second plunger cavity. The one-way oil seal on the outside of the plunger in the second plunger cavity is a leather cup 9, which forms a one-way seal with the inner wall of the second plunger cavity. At this point, the plunger is in its initial position, or first position. In this position, the leather cup is outside the pressure-reducing oil passage, connecting the upper oil passage to the second plunger cavity inside the leather cup via the pressure-reducing oil passage. When the oil pressure in the second oil passage increases to a certain level, the left end of the plunger is pushed into the first plunger cavity, compressing the return spring and sealing the pressure-reducing oil passage. The oil pressure in the first oil passage enters the second plunger cavity outside the leather cup through the auxiliary oil passage and the pressure-reducing oil passage, and then enters the second plunger cavity inside the leather cup through the leather cup, and then enters the lower oil passage. At this point, the oil pressure in the first and second oil passages acts on the slave pumps connected to them. During operation, as the return spring compresses, the pressure in the second plunger cavity increases, and the bleed screw acts to vent the air.

[0057] By arranging a thread plug on the rear side wall of the valve body corresponding to the second plunger cavity, the overall valve body can be processed more conveniently and used more flexibly.

[0058] Example 5

[0059] like Figure 6As shown, a motorcycle brake system adopting a CBS linkage structure of embodiment 4 is shown. The brake system includes a CBS linkage structure and a front brake master cylinder 12, a front brake wheel cylinder, a rear brake master cylinder 13 and a rear brake wheel cylinder connected to the CBS linkage system. The front brake wheel cylinder is connected to the front brake disc 14 for braking the front wheel, and the rear brake wheel cylinder is connected to the rear brake disc 15 for braking the rear wheel; the CBS linkage structure includes a valve body 1, which is connected in series between the front and rear brake oil pipes, and a first oil channel 2, a second oil channel 3 and a plunger cavity 3 are provided in the valve body. The first oil channel, the second oil channel and the plunger cavity 3 are connected. The plunger chambers are connected, and the plunger chamber 3 is arranged in the middle of the first oil channel and perpendicular to the second oil channel. The plunger chamber includes a first plunger chamber 3.1 and a second plunger chamber 3.3. The second plunger chamber 3.3 divides the first oil channel into an upper oil channel 1.1 and a lower oil channel 1.2. Two oil channels are opened on the valve body at the bottom of the upper oil channel 1.1, namely an auxiliary oil channel 1.11 and a pressure reducing oil channel 1.12. The inner diameter of the pressure reducing oil channel is 0.1mm-0.5mm. The upper oil channel 1.1 is connected to the second plunger chamber 3.3 via the auxiliary oil channel 1.11 and the pressure reducing oil channel 1.12. A plunger 4 is provided in the plunger cavity 3, and the plunger is matched with the first plunger cavity; a one-way oil seal is provided on the plunger in the second plunger cavity, and an opening is provided on the rear side wall of the valve body corresponding to the second plunger cavity 3.3, and a sealing member is sealed on the opening, and the sealing member is a wire plug 19, and a return spring 8 is provided between the sealing member and the rear end face of the plunger; an exhaust hole connected to the second plunger cavity is also provided on the valve body outside the first oil channel, and an exhaust screw 20 is matched with the exhaust hole; a second boss 5 is provided on the plunger, and the second boss is abutted against the inner wall of the front end of the second plunger cavity under the action of the return spring; a first oil seal 10 is provided in the first plunger cavity. Under the action of the return spring, the second boss 5 abuts the inner wall of the front end of the second plunger cavity. A one-way oil seal, a leather cup 9, seals the outer side of the plunger in the second plunger cavity. The plunger is in its initial position, or first position. In this position, the leather cup is outside the pressure relief passage, connecting the upper oil passage to the second plunger cavity inside the leather cup via the pressure relief passage. When the oil pressure in the second oil passage increases to a certain level, the left end of the plunger is pushed into the first plunger cavity, compressing the return spring and sealing the pressure relief passage. The oil pressure in the first oil passage enters the second plunger cavity outside the leather cup via the auxiliary oil passage and the pressure relief passage, then enters the second plunger cavity inside the leather cup through the leather cup, and then enters the lower oil passage. At this point, the oil pressure in the first and second oil passages acts on the slave cylinders connected to them, thereby simultaneously braking the front and rear wheels.

[0060] During operation, when the front brakes are engaged, pressure from the front brake master cylinder (12) flows through the front brake oil line into the upper oil channel of the first oil channel. Then, it flows through the pressure-reducing oil channel (1.12), the second plunger chamber inside the rubber cup, and the lower oil channel, increasing pressure on the front wheel cylinder, causing the front brake disc to apply braking force to the front wheel. When the rear brakes are engaged, pressure from the rear brake master cylinder (12) flows through the rear brake oil line and the second oil channel (3) to the rear wheel cylinder, causing the rear brake disc to apply braking force to the rear wheel. Simultaneously, the oil pressure in the second oil channel pushes plunger (4) to the right, compressing the return spring and moving it toward the screw plug. This causes rubber cup (9) to flow through pressure-reducing oil channel (1.12), closing pressure-reducing oil channel (1.12) and continuing to apply pressure to the front wheel, completing the linked braking control. In the linked state, the front brake master cylinder continues to increase pressure. Brake fluid in the upper oil channel can flow through auxiliary oil channel (1.11), pressure-reducing oil channel (1.12), and rubber cup (9) to the third plunger chamber (3.3) directly connected to the lower oil channel, further applying pressure to the front wheel cylinder, providing greater braking force to the front wheel. After releasing the brake to reduce pressure, the return spring pushes the plunger back to its original position, the leather cup returns to its original position, the decompression channel is opened, and the brake pressure disappears.

[0061] Example 6

[0062] like Figure 7 As shown, this motorcycle braking system is the same as the motorcycle braking system of Example 5, except that it is equipped with an ABS anti-lock braking system 16. The front brake master cylinder is connected to the first oil channel inlet of the CBS linkage structure valve body via a pipeline, the rear brake master cylinder is connected to the second oil channel inlet of the CBS linkage structure valve body via a pipeline, the first oil channel outlet of the CBS linkage structure valve body is connected to the front wheel oil inlet of the ABS anti-lock braking system via a pipeline, the front wheel oil outlet of the ABS anti-lock braking system is connected to the front brake cylinder via a pipeline, the second oil channel outlet of the CBS linkage structure valve body is connected to the rear wheel oil inlet of the ABS anti-lock braking system via a pipeline, and the rear wheel oil outlet of the ABS anti-lock braking system is connected to the rear brake cylinder via a pipeline.

[0063] The use process is the same as that of Example 5. Since the ABS anti-lock braking system is installed, the motorcycle braking system avoids wheel locking during linked braking, making it safer.

[0064] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any replacement, improvement or transformation made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0065] Any matters not described in detail in the present invention are well-known technologies to those skilled in the art.

Claims

1. A CBS linkage structure, comprising a valve body, characterized in that: The valve body is connected in series between the front and rear brake oil pipes, and a first oil passage (1), a second oil passage (2) and a plunger cavity (3) are provided in the valve body, the first oil passage is connected to the front brake oil pipe, and the second oil passage is connected to the rear brake oil pipe; The plunger cavity is connected to the first oil passage and the second oil passage; the plunger cavity divides the first oil passage into an upper oil passage (1.1) and a lower oil passage (1.2); a plunger (4) is provided in the plunger cavity; an auxiliary oil passage (1.11) and a pressure-reducing oil passage (1.12) are separated on a valve body at the bottom of the upper oil passage; a one-way oil seal is provided on the plunger in the plunger cavity, and a reset elastic member is provided in the plunger cavity outside the plunger; The plunger has a first position and a second position under the cooperation of the oil pressure in the second oil passage and the return spring member; when the plunger is in the first position, the pressure-reducing oil passage is connected to the plunger cavity inside the one-way oil seal and the lower oil passage; when the plunger is in the second position, the one-way oil seal blocks the pressure-reducing oil passage, and the auxiliary oil passage is connected to the plunger cavity outside the one-way oil seal and further connected to the plunger cavity inside the one-way oil seal and the lower oil passage through the one-way oil seal; The plunger cavity (3) comprises a first plunger cavity (3.1) matched with the outer wall of the plunger and a limiting cavity (3.2) arranged in the middle of the first plunger cavity; a first boss (7) is provided at the rear of the plunger, the reset elastic member is provided between the first boss and the inner wall of the rear end of the limiting cavity, a second boss (5) is provided at the front of the plunger, and the second boss abuts against the inner wall of the front end of the limiting cavity under the action of the reset elastic member; a third boss (6) is provided on the outer side of the second boss, and the one-way oil seal is provided on the outer wall of the plunger between the first boss and the third boss; The inner diameter of the limiting cavity is set larger than the inner diameter of the first plunger cavity; A first oil seal is provided between the front portion of the plunger and the inner side wall of the plunger cavity; a second oil seal is provided between the rear portion of the plunger and the inner side wall of the plunger cavity; The plunger cavity (3) comprises a first plunger cavity (3.1) and a second plunger cavity (3.3); the front portion of the plunger cooperates with the first plunger cavity, and the second plunger cavity is arranged corresponding to the first oil passage; an opening is provided on the rear side wall of the valve body corresponding to the second plunger cavity, a sealing member is provided on the opening for sealing, and a reset elastic member is provided between the sealing member and the rear end face of the plunger; an exhaust hole connected to the second plunger cavity is also provided on the valve body outside the first oil passage, and an exhaust member is provided on the exhaust hole; a second boss (5) is provided on the plunger, and the second boss abuts against the inner side wall of the front end of the second plunger cavity under the action of the reset elastic member; a one-way oil seal is provided on the plunger in the second plunger cavity.

2. The CBS linkage structure according to claim 1, characterized in that: The valve body is a split structure, and the split structure valve body is fixed by threaded fasteners.

3. A motorcycle, characterized in that: It comprises the CBS linkage structure as described in any one of claims 1-2.

4. An electric vehicle, characterized in that: It comprises the CBS linkage structure as described in any one of claims 1-2.

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