A linear brake mechanism and its brake handle, brake oil pipe and brake caliper

Abstract

A linear brake mechanism and its brake handle, brake oil pipe and brake caliper, the linear brake mechanism includes a pressure relief valve body assembly with a pressure relief chamber, and a normally closed pressure relief valve core assembly arranged in the pressure relief chamber, the pressure relief chamber assembly is connected with the brake oil circuit; the normally closed pressure relief valve core assembly is closed to block the brake oil from flowing into the pressure relief chamber, the brake oil circuit produces a static pressure state, and the instantaneous pressure at the piston rod increases rapidly after the braking continues; the normally closed pressure relief valve core assembly is opened, and a part of the brake oil flows into the pressure relief chamber to reduce the pressure value of the brake oil circuit, and the instantaneous pressure at the piston rod increases slowly after the braking continues. The present invention adaptively reduces the pressure value of the brake oil circuit through the normally closed pressure relief valve core assembly, thereby achieving the effect of adjusting the instantaneous pressure at the brake piston, and extending the braking movement stroke of the piston rod, so that the user can obtain a more linear feel when squeezing the handle.

Description

Technical Field

[0001] The present invention relates to the technical field of brake products in vehicles, in particular to a linear brake mechanism and a brake handle, a brake oil pipe and a brake caliper thereof. Background Art

[0002] Braking is an important part of vehicle safety. The quality of braking is often related to the life safety of the rider, especially for riders who often need to compete at high speeds. If the structure and efficiency of the brakes are not comprehensive and perfect, even if the rider has high riding skills, he will not be able to control the bicycle as he wishes. Especially at high speeds, both impulse and kinetic energy reach their maximum values. If the brakes cannot be applied smoothly, the life of the rider or others cannot be guaranteed, and it may even cause large-scale disasters.

[0003] The brake is a device that has the function of slowing down, stopping or keeping the moving parts (or moving machinery) stopped. It is a mechanical part that stops or slows down the moving parts in the machinery. Commonly known as brakes or gates. The brake is mainly composed of a frame, brake parts and operating devices. Some brakes are also equipped with automatic adjustment devices for the clearance of brake parts. In order to reduce the braking torque and structural size, the brake is usually installed on the high-speed shaft of the equipment, but large equipment with higher safety requirements (such as mine hoists, elevators, etc.) should be installed on the low-speed shaft close to the working part of the equipment.

[0004] In vehicles such as bicycles, the device used to control the brake is the brake (commonly known as the brake handle). The brake handle is a handle used for braking. The brake handle is used in bicycle brake handles, baby stroller handles, electric vehicle brake handles, motorcycle brake handles, etc.

[0005] Traditionally, during the installation of brake wires for electric vehicles, bicycles, tricycles, etc., traditional tools such as wire cutters and wrenches are generally used in combination with brute force to tighten the wires. This traditional wire tightening method has many shortcomings and is difficult to operate. For example, the wire is easy to slip out of the wire cutters or wrenches, and it is not easy to adjust the tension, which is particularly time-consuming and laborious.

[0006] In pursuit of braking efficiency and accuracy, hydraulic brakes are widely used in vehicles on the market (such as cars, motorcycles and bicycles). The principle is to connect one end of a brake oil pipe to the output end of the internal oil circuit of a brake handle seat, and the other end of the brake oil pipe is connected to a disc brake. The handle can be pressed to push a piston rod in the internal oil circuit, so that the pressure in the oil circuit acts on the disc brake through the brake oil pipe, thereby forming a disc brake operation.

[0007] For example, patent document CN100503354C discloses a bicycle with improved hydraulic disc brake front and rear wheel brake actuation time difference, comprising a frame, a handle, a front wheel unit, a rear wheel unit, a rear wheel hydraulic disc brake unit having a rear wheel hydraulic grip, a rear wheel disc brake pad, a rear wheel hydraulic clamping device, a rear wheel hydraulic pipe connected between the rear wheel hydraulic grip and the rear wheel hydraulic clamping device and having a first inner diameter, and a front wheel hydraulic disc brake unit having a rear wheel hydraulic pipe connected between the rear wheel hydraulic grip and the rear wheel hydraulic clamping device, and a rear wheel hydraulic pipe having a first inner diameter, and a rear wheel hydraulic disc brake unit having a rear wheel hydraulic pipe connected between the rear wheel hydraulic grip and the rear wheel hydraulic clamping device ... A front wheel hydraulic disc brake unit comprising a pressing handle, a front wheel disc brake pad, a front wheel hydraulic brake clamping device, and a front wheel hydraulic disc brake unit connected between the front wheel hydraulic handle and the front wheel hydraulic brake clamping device and having a second inner tube diameter larger than the first inner tube diameter. When the front and rear wheel hydraulic handles are switched from a released state to a clamped state, the front and rear wheel hydraulic brake clamping devices can be forced to switch from a released state to a brake state, thereby clamping the front and rear wheel disc brake pads almost simultaneously.

[0008] As described in the above patent, the working principle of the hydraulic brake adopts the Pascal principle. The Pascal principle refers to the fact that the pressure acting on a closed fluid can be transmitted from the fluid to various parts of the container without changing its size. It has the following characteristics: 1. This law is only applicable to fluid mechanics. Because the liquid is flowing, when it is placed in a sealed container, its pressure changes, and it will spread the pressure in all directions. During the transmission process, the force will not change. 2. Pascal's law is a basic principle of hydrostatics. Pascal's law shows that in an incompressible static liquid, any point under the action of pressure will be instantly transmitted to the static liquid. 3. According to Pascal's law, when pressure acts on a piston, it will inevitably cause the same pressure to be generated on another piston. If the area of ​​the second piston is one-tenth of the previous piston, the pressure applied to the first piston will increase ten times the pressure of the second piston. 4. The basic formula of Pascal's law is: P = F1 / A1 = F2 / A2, that is, F2 = (A2 / A1)F1.

[0009] Combining the above-mentioned patented products and existing technologies, there is a common defect, specifically: after the idle travel section of the piston rod has moved, the brake begins to take effect and forms a closed oil circuit. When the user subsequently squeezes the handle to drive the piston rod, there will be obvious resistance. The end surface of the piston rod in contact with the brake oil produces a large instantaneous pressure, and the segmented feeling of the change in feel is obvious (non-linear feel). The feedback to the user is a feeling similar to hitting a wall when squeezing the handle, causing serious discomfort and affecting the braking effect and safety of use. Summary of the invention

[0010] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a linear brake mechanism and a brake handle, a brake oil pipe and a brake caliper thereof.

[0011] The technical solution of the present invention to solve the technical problem is: a linear brake mechanism, comprising:

[0012] A pressure relief valve body assembly having a pressure relief chamber, wherein the pressure relief chamber is communicated with a brake oil circuit;

[0013] A normally closed pressure relief valve core assembly is disposed in the pressure relief chamber, and the normally closed pressure relief valve core assembly can be closed and opened;

[0014] When the pressure of the brake oil circuit acting on the normally closed pressure relief valve core assembly is less than or equal to the preset pressure relief value, the normally closed pressure relief valve core assembly is closed to prevent the brake oil from flowing into the pressure relief chamber. At this time, the brake oil circuit generates a static pressure state, and the instantaneous pressure generated at the piston rod will increase rapidly when the brake is continued;

[0015] When the pressure of the brake oil circuit acting on the normally closed pressure relief valve core assembly is greater than the preset pressure relief value, the normally closed pressure relief valve core assembly opens, allowing a portion of the brake oil to flow into the pressure relief chamber to reduce the pressure value of the brake oil circuit. When the brake is continuously applied, the instantaneous pressure generated at the piston rod slowly increases;

[0016] When the pressure of the brake oil circuit acting on the normally closed pressure relief valve core assembly is greater than the preset pressure reduction value and continues to increase, the contraction amount of the normally closed pressure relief valve core assembly continues to increase, so as to significantly reduce the pressure value of the brake oil circuit. When braking continues, the instantaneous pressure generated at the piston rod continues to increase slowly.

[0017] The normally closed pressure reducing valve core assembly comprises a valve core movably arranged in a pressure reducing chamber, a stopper fixedly arranged relative to the pressure reducing chamber, and a spring arranged between the stopper and the valve core.

[0018] A further configuration of the above technical solution is that a limiting column is protruded from the end of the limiting member, and the limiting column at least partially extends into the spring.

[0019] A further configuration of the above technical solution is that the limit member is threadedly connected to the pressure relief valve body assembly, and the thread depth of the limit member screwed into the pressure reducing valve body is adjustable to adjust the distance between the limit member and the valve core and change the maximum pressure reducing stroke of the valve core.

[0020] A further configuration of the above technical solution is that an annular groove is provided on the valve core, a bidirectional sealing ring is embedded in the annular groove, and the bidirectional sealing ring respectively abuts against the valve core and the inner wall of the decompression chamber to form a sealing fit.

[0021] A further configuration of the above technical solution is that a one-way oil seal is also provided on one end of the valve core close to the piston chamber.

[0022] A further configuration of the above technical solution is that the pressure relief valve body assembly includes a pressure relief base and a threaded connection seat detachably connected to the pressure relief base, and the limit member is threadedly connected to the threaded connection seat.

[0023] The present invention also provides a brake handle, comprising a brake pump body and a handle connected to one end of the brake pump body, wherein the brake pump body is provided with a piston cavity, and a piston rod acted upon by the handle is provided in the piston cavity;

[0024] It also includes the linear brake mechanism as described above, wherein the pressure relief valve body assembly is arranged on the brake pump body, and the pressure relief chamber is communicated with the piston chamber.

[0025] The present invention also provides a brake oil pipe, including an oil pipe body, the oil pipe body having an oil pipe oil channel, and also including the linear brake mechanism as described above, the oil pipe body is connected to the linear brake mechanism, and the decompression chamber is connected to the brake oil circuit.

[0026] The present invention also provides a brake caliper, including a caliper body, wherein the caliper body has a caliper oil passage, and also includes the linear brake mechanism as described above, wherein the caliper body is connected to the linear brake mechanism, and the decompression chamber is connected to the caliper oil passage.

[0027] The beneficial effects of the present invention are:

[0028] 1. Under the condition of the same braking force, the pressure value of the brake oil circuit is adaptively reduced through the normally closed pressure relief valve core assembly, thereby achieving the effect of adjusting the instantaneous pressure at the brake piston, extending the braking movement stroke of the piston rod (that is, the stroke from the beginning of squeezing the handle to the feeling of hitting the wall), so that the user can get a more linear feel when squeezing the handle.

[0029] 2. The brake oil circuit involves the brake handle, brake oil pipe and brake caliper. The normally closed pressure relief valve core assembly can be connected to any one or more of the brake handle, brake oil pipe and brake caliper to meet the needs of different users.

[0030] 3. The size, material and shape of springs, limiters, valve cores, etc. can be adjusted to achieve different maximum decompression effects and adapt to the use requirements of different brake oil circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the appearance structure of the present invention.

[0032] Figure 2 It is a schematic diagram of the partial structure explosion of the present invention.

[0033] Figure 3It is a cross-sectional view of the normally closed pressure relief valve core assembly of the present invention when it is reset and expanded.

[0034] Figure 4 It is a cross-sectional view of the normally closed pressure relief valve core assembly of the present invention when it is deformed and contracted.

[0035] Figure 5 It is a schematic diagram of the assembly of the valve core, the bidirectional sealing ring and the one-way oil seal in the present invention.

[0036] Figure 6 It is a structural schematic diagram of the limiting member in the present invention.

[0037] Figure 7 This is a schematic diagram of the structure of the normally closed pressure relief valve core assembly of the present invention.

[0038] Figure 8 This is a schematic diagram of applying a linear brake mechanism to a brake oil pipe.

[0039] Fig. 9 This is a schematic diagram of applying a linear brake mechanism to a brake caliper.

[0040] Fig.10 It is a comparative diagram when the limiter is screwed into different thread depths.

[0041] Fig.11 This is a relationship diagram between the applied force F1 and the handle movement stroke L during the use of the brake handle product in the prior art.

[0042] Fig.12 It is a relationship diagram between the applied force F1 and the handle movement stroke L during use of the brake handle product of the present invention (when the maximum decompression stroke is small).

[0043] Fig.13 It is a relationship diagram between the applied force F1 and the handle movement stroke L during use of the brake handle product of the present invention (when the maximum decompression stroke is large).

[0044] In the figure: 1. pressure relief valve body assembly; 101. pressure relief chamber; 102. pressure relief base; 103. threaded connection seat; 2. normally closed pressure relief valve core assembly; 201. valve core; 2011. ring groove; 202. limit piece; 2021. limit column; 203. spring; 3. brake oil circuit; 4. two-way sealing ring; 5. guide hole; 6. brake pump body; 601. piston chamber; 7. handle; 8. piston rod; 9. oil pipe body; 901. oil pipe oil channel; 10. caliper body; 1001. caliper oil channel; 11. one-way oil seal. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solutions of the present invention, and should not be regarded as limitations of the present invention.

[0046] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Embodiment 1

[0049] Reference Figure 1 to Figure 7 A linear brake mechanism includes: a pressure relief valve body assembly 1, which has a pressure relief chamber 101, and the pressure relief chamber 101 is connected to the brake oil circuit 3; a normally closed pressure relief valve core assembly 2, which is arranged in the pressure relief chamber 101, and the normally closed pressure relief valve core assembly 2 can be closed and opened. The pressure relief valve body assembly 1 can adjust the position of the normally closed pressure relief valve core assembly 2 relative to the pressure relief chamber 101 according to the real-time pressure in the brake oil circuit 3. The specific movement mechanism of the pressure relief valve body assembly 1 is:

[0050] When the pressure of the brake oil circuit 3 acting on the normally closed pressure relief valve core assembly 2 is less than or equal to the preset pressure relief value, the normally closed pressure relief valve core assembly 2 is closed to block the brake oil from flowing into the pressure relief chamber 101, and the brake oil circuit 3 generates a static pressure state. According to Pascal's theorem (P=F1 / A1=F2 / A2), the force F1 applied to the piston rod 8 increases after the brake is continued. When the oil pushing area A1 at the end of the piston rod 8 remains unchanged, the instantaneous pressure P (F1 / A1) at the piston rod 8 increases rapidly.

[0051] When the pressure of the brake oil circuit 3 acting on the normally closed pressure relief valve core assembly 2 is greater than the preset pressure relief value, the normally closed pressure relief valve core assembly 2 opens, and a part of the brake oil flows into the pressure relief chamber 101 to reduce the pressure value F3 of the brake oil circuit 3. After the brake is continued, the force F1 applied to the piston rod 8 increases. When the oil pushing area A1 at the end of the piston rod 8 remains unchanged, the instantaneous pressure P ((F1-F3) / A1) at the piston rod 8 slowly increases;

[0052] When the pressure of the brake oil circuit 3 acting on the normally closed pressure relief valve core assembly 2 is greater than the preset pressure reduction value and continues to increase, the contraction amount of the normally closed pressure relief valve core assembly 2 continues to increase to significantly reduce the pressure value F4 of the brake oil circuit 3, and F4>F3. After braking continues, the force F1 applied to the piston rod 8 increases. When the oil pushing area A1 of the piston rod 8 remains unchanged, the instantaneous pressure P ((F1-F4) / A1) at the piston rod 8 continues to increase slowly.

[0053] In the present invention, under the condition of the same braking force, through the setting of the normally closed pressure relief valve core assembly 2, once the pressure of the brake oil circuit 3 acting on the normally closed pressure relief valve core assembly 2 is greater than the preset pressure reduction value, the normally closed pressure relief valve core assembly 2 opens and releases part of the pressure, thereby achieving the effect of adjusting the instantaneous pressure at the brake piston rod 8. In other words, under the condition of the same braking force effect of the brake caliper (brake pad and brake disc), the stroke of the piston rod 8 (handle 7) can be extended to allow users to obtain a more linear feel.

[0054] The preferred solution of the normally closed pressure relief valve core assembly 2 is: comprising a valve core 201 movably arranged in the pressure relief chamber 101, a stopper 202 fixedly arranged relative to the pressure relief chamber 101, and a spring 203 arranged between the stopper 202 and the valve core 201. The stopper 202 plays a supporting role, the valve core 201 can move relative to the stopper 202 to play a sealing switch and adjustment role, and the spring 203 acts on the valve core 201 so that the valve core 201 has a movement tendency to close when in use.

[0055] That is, when the handle 7 is not squeezed or is squeezed lightly, the pressure in the brake oil circuit 3 is relatively small. Under the action of the spring 203, the valve core 201 is always in the closed position, so that the decompression chamber 101 is disconnected from the brake oil circuit 3, and the brake oil circuit 3 forms a static pressure state. In this case, the braking feel is the same as that of the existing brake handle 7 on the market. After braking continues, the instantaneous pressure at the piston rod 8 increases rapidly.

[0056] When the handle 7 is squeezed hard, the pressure in the brake oil circuit 3 is relatively high and the pressure is transmitted to the spring 203 through the valve core 201. The spring 203 deforms and contracts and drives the valve core 201 to move. A part of the brake oil flows into the decompression chamber 101 to reduce the pressure value of the brake oil circuit 3, that is, to share part of the original pressure in the brake oil circuit 3. In this case, the instantaneous pressure at the piston rod 8 slowly increases after the brake is continued.

[0057] During use, since the spring 203 needs to be constantly extended and retracted, there may be deviation during the extension and retraction process, which will cause the effect of subsequent use to change and fail to achieve the pre-set effect. Therefore, when used in precision products such as brakes, it is necessary to effectively limit the active position of the spring 203. The preferred method is: a limit column 2021 is convexly provided at the end of the limit member 202, and the limit column 2021 at least partially extends into the spring 203. The advantages are: on the one hand, the limit column 2021 can play the role of limiting the spring 203, and on the other hand, the limit column 2021 is directly formed on the limit member 202, without the need for additional components and space, making the related structure more compact and reasonable.

[0058] Furthermore, the valve core 201 is provided with an annular groove 2011, in which a bidirectional sealing ring 4 is embedded, and the bidirectional sealing ring 4 abuts against the inner wall of the valve core 201 and the decompression chamber 101 to form a sealing fit, thereby preventing the brake oil from leaking from the gap, and thus ensuring that the regulating effect of the valve core 201 meets expectations while ensuring the sealing effect; in addition, the valve core 201 is a separately produced component, so the annular groove 2011 is formed on the valve core 201, which is easy to operate and process.

[0059] Preferably, the end of the valve core 201 close to the piston chamber 601 is also sleeved with a one-way oil seal 11. In the structure with the spring 203, the one-way oil seal 11 has better adaptability and reliability of sealing during rotation. At the same time, the one-way oil seal 11 cooperates with the two-way sealing ring 4 to achieve a double-channel sealing effect.

[0060] The present invention is further configured such that the decompression chamber 101 is connected to the brake oil circuit 3 through the conducting hole 5, and the valve core 201 can be close to or far away from the conducting hole 5. The closer the valve core 201 is to the conducting hole 5, the smaller the pressure relief effect; the farther the valve core 201 is from the conducting hole 5, the greater the pressure relief effect. Furthermore, according to the real-time position change of the valve core 201, the pressure relief effect and the brake feel can be adjusted.

[0061] In the present invention, the material and size of the spring 203 can be customized according to requirements to meet diverse usage requirements and adapt to different types of brake oil circuits 3 one by one.

[0062] In the present invention, the brake oil circuit 3 refers to any one or more of the piston chamber 601 , the oil pipe oil passage 901 and the caliper oil passage 1001 .

[0063] Embodiment 2

[0064] On the basis of the first embodiment, once the spring 203 reaches the maximum compression, the brake oil circuit 3 generates a static pressure state again, and if the handle 7 is continued to be squeezed (i.e. the piston rod 8 is pushed), the instantaneous pressure at the piston rod 8 increases rapidly, and the feeling of hitting the wall when squeezing the handle 7 is obvious.

[0065] When the brakes are actually used, some users are accustomed to the static pressure state being formed after the piston rod 8 has a short stroke, while other users are accustomed to the static pressure state being formed after the piston rod 8 has a long stroke.

[0066] This embodiment provides another significant innovation of the present invention, that is, the maximum pressure relief pressure of the normally closed pressure relief valve core assembly 2 is adjustable. The specific implementation method is as follows:

[0067] Reference Fig.10 The stopper 202 is threadedly connected to the pressure relief valve body assembly 1 to achieve assembly connection between the two. In addition, the thread depth of the stopper 202 screwed into the pressure relief valve body is adjustable to adjust the distance between the stopper 202 and the valve core 201 and change the maximum pressure relief stroke of the valve core 201.

[0068] The deeper the thread depth of the stopper 202 is screwed into, the shorter the distance between the stopper 202 and the valve core 201 is, the shorter the maximum decompression stroke of the valve core 201 is, the less obvious the pressure relief effect of the normally closed pressure relief valve core 201 is, the faster the normally closed pressure relief valve core 201 re-enters the static pressure state after pressure relief, and the faster the feeling of hitting the wall when squeezing the handle 7 comes;

[0069] The shallower the thread depth of the limit member 202, the longer the distance between the limit member 202 and the valve core 201, the longer the maximum pressure relief stroke of the valve core 201, the more obvious the pressure relief effect of the normally closed pressure relief valve core 201 group, the slower the normally closed pressure relief valve core 201 group re-enters the static pressure state after pressure relief, and the slower the feeling of hitting the wall when squeezing the handle 7.

[0070] The longitudinal coordinate system represents the force F1 applied by squeezing the handle 7, and the transverse coordinate system represents the movement stroke L of the handle 7 (piston rod 8). The oil pushing area A1 at the piston rod 8 remains unchanged, so the instantaneous pressure is P=(F1 / A1).

[0071] Reference Fig.11 , which is a relationship diagram between the applied force F1 and the movement stroke L of the handle 7 during use of the brake handle 7 product in the prior art.

[0072] Reference Fig.12, which is a relationship diagram between the applied force F1 and the movement stroke L of the handle 7 during use of the brake handle 7 product of the present invention (when the maximum decompression stroke is small).

[0073] Reference Fig.13 , which is a relationship diagram between the applied force F1 and the movement stroke L of the handle 7 during use of the brake handle 7 product in the prior art (when the maximum decompression stroke is large).

[0074] Preferably, the pressure relief valve body assembly 1 includes a pressure relief base 102 and a threaded connection seat 103 detachably connected to the pressure relief base 102, and the stopper 202 is threadedly connected to the threaded connection seat 103. In addition, the maximum pressure relief stroke of the pressure relief renovation is not unique, and the user can selectively adjust the screwing depth of the stopper 202 and the pressure relief valve body assembly 1 according to the characteristics of the brake oil circuit 3, so that the maximum pressure relief stroke of the pressure relief chamber 101 changes, meeting the use requirements of different users for the brake feel.

[0075] Embodiment 3

[0076] The present invention also provides a brake handle 7, referring to Figure 1 to Figure 4 , comprising a brake pump body 6, and a handle 7 connected to one end of the brake pump body 6, wherein the brake pump body 6 is provided with a piston chamber 601, and a piston rod 8 acted upon by the handle 7 is provided in the piston chamber 601;

[0077] It also includes the linear brake mechanism as described above, wherein the pressure relief valve body assembly 1 is arranged on the brake pump body 6, and the decompression chamber 101 is communicated with the piston chamber 601.

[0078] Among them, the pressure relief valve body assembly 1 can be used as a modified part after being assembled with the brake handle 7; the pressure relief valve body assembly 1 can also be used as an integral part with the brake handle 7, that is, the decompression chamber 101 is directly formed on the brake pump body 6 during production.

[0079] Embodiment 4

[0080] Reference Figure 8 The present invention also provides a brake oil pipe, including an oil pipe body 9, the oil pipe body 9 has an oil pipe oil passage 901, and also includes the linear brake mechanism as described above, the oil pipe body 9 is connected to the linear brake mechanism, and the decompression chamber 101 is connected to the brake oil passage 3. Among them, the pressure relief valve body assembly 1 can be used as a modified part after being assembled with the oil pipe body 9; the pressure relief valve body assembly 1 can also be used in an integrally formed manner with the oil pipe body 9, that is, the decompression chamber 101 is directly formed on the oil pipe body 9 during production.

[0081] Embodiment 5

[0082] Reference Fig. 9 The present invention also provides a brake caliper, including a caliper body 10, wherein the caliper body 10 has a caliper oil passage 1001, and also includes the linear brake mechanism as described above, wherein the caliper body 10 is connected to the linear brake mechanism, and the decompression chamber 101 is connected to the caliper oil passage 1001.

[0083] Among them, the linear brake mechanism can be used as a modified part after being assembled with the caliper body 10; the pressure relief valve body assembly 1 can also be used as an integral part with the caliper body 10, that is, the decompression chamber 101 is directly formed on the caliper body 10 during production.

[0084] It is worth noting that other technical solutions of the present invention belong to the prior art and will not be described in detail.

[0085] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A linear brake mechanism, characterized in that: Included are: A pressure relief valve body assembly (1), which has a pressure relief chamber (101), and the pressure relief chamber (101) is connected to a brake oil circuit (3); A normally closed pressure relief valve core assembly (2), which is arranged in the pressure relief chamber (101), and the normally closed pressure relief valve core assembly (2) can be closed and opened; When the pressure of the brake oil circuit (3) acting on the normally closed pressure relief valve core assembly (2) is less than or equal to the preset pressure relief value, the normally closed pressure relief valve core assembly (2) is closed to prevent the brake oil from flowing into the pressure relief chamber (101). At this time, the brake oil circuit (3) generates a static pressure state, and the instantaneous pressure generated at the piston rod (8) will increase rapidly when the brake is continued; When the pressure of the brake oil circuit (3) acting on the normally closed pressure relief valve core assembly (2) is greater than a preset pressure relief value, the normally closed pressure relief valve core assembly (2) opens, allowing a portion of the brake oil to flow into the pressure relief chamber (101) to reduce the pressure value of the brake oil circuit (3), and the instantaneous pressure generated at the piston rod (8) slowly increases when the brake is continuously applied; When the pressure of the brake oil circuit (3) acting on the normally closed pressure relief valve core assembly (2) is greater than the preset pressure reduction value and continues to increase, the contraction amount of the normally closed pressure relief valve core assembly (2) continues to increase, so as to significantly reduce the pressure value of the brake oil circuit (3). When the brake is continued, the instantaneous pressure generated at the piston rod (8) continues to increase slowly.

2. The linear brake mechanism according to claim 1, characterized in that: The normally closed pressure relief valve core assembly (2) comprises a valve core (201) movably arranged in the pressure relief chamber (101), a limiter (202) fixedly arranged relative to the pressure relief chamber (101), and a spring (203) arranged between the limiter (202) and the valve core (201).

3. The linear brake mechanism according to claim 2, characterized in that: A limiting column (2021) is protrudingly provided at the end of the limiting member (202), and the limiting column (2021) at least partially extends into the spring (203).

4. The linear brake mechanism according to claim 2, characterized in that: The limit member (202) is threadedly connected to the pressure relief valve body assembly (1), and the thread depth of the limit member (202) screwed into the pressure relief valve body is adjustable to adjust the distance between the limit member (202) and the valve core (201) and change the maximum pressure relief stroke of the valve core (201).

5. The linear brake mechanism according to claim 2, characterized in that: The valve core (201) is also provided with an annular groove (2011), in which a bidirectional sealing ring (4) is embedded. The bidirectional sealing ring (4) respectively abuts against the valve core (201) and the inner wall of the decompression chamber (101) to form a sealing fit.

6. The linear brake mechanism according to claim 2, characterized in that: One end of the valve core (201) close to the piston chamber (601) is also sleeved with a one-way oil seal (11).

7. The linear brake mechanism according to claim 2, characterized in that: The pressure relief valve body assembly (1) comprises a pressure relief base (102) and a threaded connection seat (103) detachably connected to the pressure relief base (102), and the limiter (202) is threadedly connected to the threaded connection seat (103).

8. A brake handle, comprising a brake pump body (6), and a handle (7) connected to one end of the brake pump body (6), wherein the brake pump body (6) is provided with a piston chamber (601), and a piston rod (8) is provided in the piston chamber (601) and is acted upon by the handle (7); Features: It also includes a linear brake mechanism as described in any one of claims 1 to 7, wherein the pressure relief valve body assembly (1) is arranged on the brake pump body (6), and the pressure relief chamber (101) is connected to the piston chamber (601).

9. A brake oil pipe, comprising an oil pipe body (9), wherein the oil pipe body (9) has an oil pipe oil passage (901), and characterized in that: It also includes a linear brake mechanism as described in any one of claims 1 to 7, wherein the oil pipe body (9) is connected to the linear brake mechanism, and the decompression chamber (101) is connected to the brake oil circuit (3).

10. A brake caliper, comprising a caliper body (10), wherein the caliper body (10) has a caliper oil passage (1001), characterized in that: It also includes a linear brake mechanism as described in any one of claims 1 to 7, wherein the caliper body (10) is connected to the linear brake mechanism, and the decompression chamber (101) is connected to the caliper oil passage (1001).

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