Brake upper pump with force-releasing and anti-falling functions

Abstract

A brake upper pump with a force-releasing and anti-falling function comprises a brake pump body, a piston cavity is formed in the brake pump body, brake oil is filled in the piston cavity, and the front end of the piston cavity is used for being connected with a brake oil pipe; the brake handle is in transmission connection with a piston push rod assembly, and at least part of the piston push rod assembly extends into the piston cavity from back to front; the brake pump body is internally provided with a force release section communicated with the piston cavity, the elastic force release element is arranged in the force release section and can deform in the force release section, and the elastic force release element acts on the piston push rod assembly, so that the piston push rod assembly always has the movement trend of forward movement. The brake pump has the advantages that the force release section is arranged, the buffering distance for backward movement is provided for the piston push rod assembly (the push rod body), the piston push rod assembly is prevented from directly colliding with the brake pump body at the first time, and therefore the collision force is reduced, and the damage probability of the piston push rod assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brake parts for riding vehicles, in particular to a brake upper pump with a force release and fall prevention function. 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] In vehicles such as bicycles, the device used to control the brakes 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.

[0004] With the continuous improvement of technology, the brakes used in bicycles and other transportation tools on the market have gradually eliminated the traditional brakes that rely on solid media such as steel wires for transmission, and replaced them with hydraulic brakes that use liquid media such as oil as transmission media. The most representative of these is the hydraulic brake. The principle of the hydraulic brake is to combine one end of a brake oil pipe with the output end of the internal oil circuit of a brake handle seat, and the other end of the brake oil pipe is combined with 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, forming a disc brake operation.

[0005] The brake pump is installed on the handlebars of the vehicle, and it is difficult to ensure absolute stability during riding, and collisions, falls, etc. may occur. Since the brake pump is an exposed accessory, once it is subjected to external force in a direction other than the direction of use, it will cause the brake handle to move in the opposite direction, and at the same time, the piston push rod assembly will also move in the opposite direction, and then a strong collision will occur between the piston push rod assembly and the brake pump body, causing irreversible damage, resulting in the scrapping of the brake pump, the failure of the brake function, and causing losses to the user.

[0006] In order to solve the above defects, the inventor has previously proposed a solution, referring to the patent document CN218641015U, which discloses a brake that is resistant to falling and damage, including a brake body, which is provided with a pressure cylinder; a piston rod, which is movably arranged in the pressure cylinder; a handle, which is rotatably connected to the brake body and forms a transmission connection with the piston rod; a vehicle oil pipe, which is connected to the brake body and communicates with the pressure cylinder; a transmission rod, which is connected between the handle and the piston rod; a limiter, which is connected in the pressure cylinder and forms a one-way limit fit with the end of the transmission rod; the pressure cylinder is provided with a limiter cavity, the limiter is in the limiter cavity, and an installation opening is provided on the outside of the limiter cavity; a critical section is also provided between the inner wall of the limiter cavity and the installation opening. When the hydraulic brake of the utility model is subjected to severe impact, the limiter in the limiter cavity is pressed and guided by the critical section to detach from the limiter cavity from the installation opening, thereby preventing irreversible damage caused by collision and extrusion, and effectively increasing the service life of the hydraulic brake. However, after subsequent testing and user use, this solution also revealed some disadvantages, such as: 1. In order to protect the piston push rod assembly and the brake handle when a fall occurs, sacrificial parts (such as retaining springs) are made. Therefore, sacrificial parts are consumables and require certain maintenance costs; 2. When the anti-fall function is triggered, the piston push rod assembly needs to be detached from the limit cavity and reassembled later. Therefore, the user needs to have certain hands-on skills, otherwise it will not be possible to restore it to the state before the fall; 3. Repeated brushing of the car may cause repeated disassembly and assembly of the piston push rod assembly. As the number of times increases, the accuracy of the installation will inevitably decrease, which is prone to loose sealing and brake oil leakage, which in turn leads to a decrease in braking performance or failure; 4. Due to the existence of the limit cavity and the critical section, this type of anti-fall structure will not fit too tightly with the piston push rod assembly, so there is a defect of loose feel. Summary of the invention

[0007] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a brake upper pump with a force release and fall prevention function.

[0008] The utility model solves the technical problem by providing a brake upper pump with a force release and fall prevention function, comprising:

[0009] A brake pump body, which is provided with a piston cavity, the piston cavity is filled with brake oil, and the front end of the piston cavity is used to connect the brake oil pipe;

[0010] A brake handle, which is drivingly connected to a piston push rod assembly, wherein at least a portion of the piston push rod assembly extends from the back to the front into the piston cavity;

[0011] Also included are:

[0012] Elastic force-relieving element, a force-relieving section communicating with the piston chamber is provided in the brake pump body, the elastic force-relieving element is arranged in the force-relieving section and can deform in the force-relieving section, and the elastic force-relieving element acts on the piston push rod assembly so that the piston push rod assembly always has a tendency to move forward.

[0013] Further, the piston chamber has an opening at the rear end, and the piston push rod assembly extends into the piston chamber through the opening at the rear end;

[0014] A first limiting portion is provided inwardly at the edge of the opening at the rear end, the rear end of the elastic force-relieving element abuts against the first limiting portion, and the front end of the elastic force-relieving element abuts against the piston push rod assembly.

[0015] Specifically, the piston push rod assembly includes a piston body, a push rod body and a piston oil seal;

[0016] The piston body is movably arranged in the piston chamber;

[0017] The front end of the push rod body can abut against the piston body and form a transmission fit, and the push rod body forms a transmission fit with the brake handle through a transmission shaft assembly;

[0018] The piston oil seal is sleeved on the piston body, and the piston oil seal abuts against the inner wall of the piston chamber.

[0019] Furthermore, the front end of the push rod body has a ball head section, the rear end of the piston body has an arc-shaped groove, at least part of the ball head section is clamped into the arc-shaped groove, and the front end of the elastic force-relieving element abuts against the ball head section.

[0020] In some preferred embodiments of the present invention, an elastic reset element is further provided in the piston chamber, and the elastic reset element acts on the piston push rod assembly so that the piston push rod assembly always has a tendency to move backward;

[0021] A second limiting portion is provided on the inner wall of the piston chamber, the front end of the elastic reset element abuts against the second limiting portion, and the rear end of the elastic reset element abuts against the piston body.

[0022] In some preferred embodiments of the present invention, the brake master cylinder further includes a cylinder liner, at least part of the cylinder liner is located in the piston chamber, and the piston push rod assembly is movably arranged in the cylinder liner;

[0023] A third limiting portion is provided on the outer periphery of the piston body, and the third limiting portion can abut against the front end face of the cylinder liner.

[0024] Further, the force-relieving section is located in the cylinder liner.

[0025] Optionally, the cylinder liner and the brake pump body are an integral part.

[0026] Optionally, the cylinder liner and the brake pump body are separate parts, and one or more first sealing rings are provided between the cylinder liner and the brake pump body.

[0027] In the present utility model, the piston cavity has a front end opening, and a tubing joint is provided at the front end opening, and the tubing joint is detachably connected to the brake tubing.

[0028] The beneficial effects of the present utility model are as follows: A force relief section is provided. During normal use, the piston push rod assembly will not enter the force relief section. Only in an emergency, when the brake handle (piston push rod assembly) is subjected to a reverse force, at this time the piston push rod assembly (push rod body) will enter the force relief section and move along the force relief section to provide a buffer distance for the piston push rod assembly (push rod body) to move backward, preventing the piston push rod assembly from directly hitting the brake pump body in the first time, thereby reducing the impact force and reducing the damage probability of the piston push rod assembly.

[0029] Second, an elastic force relief element is provided in the force relief section, which can directly or indirectly offset part of the impact force received by the piston push rod assembly (push rod body), so as to slow down the backward speed of the piston push rod assembly and reduce the backward distance of the piston push rod assembly (push rod body), thereby reducing the damage probability of the brake handle and the piston push rod assembly.

[0030] Third, the front end of the elastic force relief element always abuts against the piston push rod assembly. In the normal use state, the elastic force relief element can continuously provide a forward pre-tightening force to the piston push rod assembly (push rod body) to eliminate the gap between components, make the components fit tightly, and thus eliminate the shaking feeling of the piston push rod assembly and the brake handle. Description of the Drawings

[0031] Figure 1 is the overall structural schematic diagram of the present utility model.

[0032] Figure 2 is the exploded schematic diagram of the present utility model.

[0033] Figure 3 is the sectional view of the present utility model (in the non-use state).

[0034] Figure 4 is Figure 3 the enlarged schematic diagram of the partial structure of part A in

[0035] Figure 5 is Figure 3 the enlarged schematic diagram of the partial structure of part B in

[0036] Figure 6 is a cross-sectional view of the present utility model (in the state of falling-off vehicle and releasing force).

[0037] Figure 7 is Figure 6 a schematic enlarged view of the partial structure of part C in

[0038] Figure 8 is a cross-sectional view of the present utility model (in the normal use state).

[0039] Figure 9 is Figure 8 a schematic enlarged view of the partial structure of part D in

[0040] Figure 10 is Figure 8 a schematic enlarged view of the partial structure of part E in

[0041] In the figure: 1, brake pump body; 11, piston cavity; 111, rear end opening; 111a, first limit part; 112, second limit part; 113, front end opening; 2, brake handle; 3, piston push rod assembly; 31, piston body; 311, arc groove; 312, third limit part; 32, push rod body; 321, ball head section; 33, piston oil seal; 4, elastic force-releasing element; 4L, force-releasing section; 5, drive shaft assembly; 6, elastic reset element; 7, oil pipe joint; 8, cylinder sleeve; 81, first sealing ring; 82, second sealing ring; 8a, front end face of the cylinder sleeve. Specific embodiments

[0042] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific elaborations of the present utility model, and their purpose is to enable those skilled in the art to better understand the technical solutions of the present utility model, and should not be regarded as a limitation of the present utility model.

[0043] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model.

[0044] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "connection", and "coupling" 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, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] Embodiment 1

[0046] Referring to Figures 1 to 10 , a brake master cylinder with a force - releasing and anti - dropping function includes: a brake pump body 1, which is provided with a piston chamber 11 filled with brake fluid, and the front end of the piston chamber 11 is used to connect a brake oil pipe; a brake handle 2, which is drivingly connected with a piston push rod assembly 3, and at least part of the piston push rod assembly 3 extends from the rear to the front into the piston chamber 11.

[0047] It is worth mentioning that the brake master cylinder further includes: an elastic force - releasing element 4. The brake pump body 1 has a force - releasing section 4L communicating with the piston chamber 11. The elastic force - releasing element 4 is arranged in the force - releasing section 4L and can deform in the force - releasing section 4L, and the elastic force - releasing element 4 acts on the piston push rod assembly 3 so that the piston push rod assembly 3 always has a tendency to move forward.

[0048] The above content is the basic structural solution of the present utility model. Compared with the prior art, first, a force - releasing section 4L is provided. During normal use, referring to Figure 5 , Figure 10 , the piston push rod assembly 3 will not enter the force - releasing section 4L. Only in an emergency, referring to Figure 7 , when the brake handle 2 (piston push rod assembly 3) is subjected to a reverse force, at this time, the piston push rod assembly 3 (push rod body 32) will enter the force - releasing section 4L and move along the force - releasing section 4L to provide a buffer distance for the piston push rod assembly 3 (push rod body 32) to move backward, preventing the piston push rod assembly 3 from directly hitting the brake pump body 1 at the first time, thereby reducing the impact force and reducing the probability of damage to the piston push rod assembly 3; second, an elastic force - releasing element 4 is arranged in the force - releasing section 4L, which can directly or indirectly offset part of the impact force received by the piston push rod assembly 3 (push rod body 32), so as to slow down the backward speed of the piston push rod assembly 3 and reduce the backward distance of the piston push rod assembly 3 (push rod body 32), thereby reducing the probability of damage to the brake handle 2 and the piston push rod assembly 3; third, the front end of the elastic force - releasing element 4 always abuts against the piston push rod assembly 3. Under normal use conditions, referring to Figure 4, the elastic force - releasing element 4 can provide a forward pre - tightening force to the piston push - rod assembly 3 (push - rod body 32) to eliminate the gaps between components, making the components fit tightly, and further eliminating the shaking of the piston push - rod assembly 3 and the brake handle 2.

[0049] In some specific embodiments, the piston chamber 11 has a rear - end opening 111, and the piston push - rod assembly 3 extends into the piston chamber 11 through the rear - end opening 111. A more preferred installation position of the elastic force - releasing element 4 is as follows: Refer to Figure 5 , a first limiting portion 111a is provided inwardly at the edge of the rear - end opening 111. The rear end of the elastic force - releasing element 4 abuts against the first limiting portion 111a, and the front end of the elastic force - releasing element 4 abuts against the piston push - rod assembly 3. Since the piston push - rod assembly 3 is a movable component and the first limiting portion 111a belongs to a component at a fixed position, the elastic force - releasing element 4 undergoes adaptive deformation following the displacement of the piston push - rod assembly 3. On the other hand, it should also be understood that the elastic force - releasing element 4 can deform between the piston push - rod assembly 3 and the first limiting portion 111a.

[0050] In the above, the first limiting portion 111a can be a single - piece part, which is assembled to the edge of the rear - end opening 111 later. The assembly can be achieved by means such as screws and buckles, and no special limitation is made here; of course, the first limiting portion 111a can also be an integral part with the rear - end opening 111, and no special limitation is made here.

[0051] Specifically, refer to Figure 2 , the piston push - rod assembly 3 includes a piston body 31, a push - rod body 32, and a piston oil seal 33. Among them, the piston body 31 is movably arranged in the piston chamber 11; the front end of the push - rod body 32 can abut against the piston body 31 to form a transmission fit, and the push - rod body 32 forms a transmission fit with the brake handle 2 through a transmission shaft assembly 5; the piston oil seal 33 is sleeved on the piston body 31, and the piston oil seal 33 abuts against the inner wall of the piston chamber 11. When the user pinches the brake handle 2, the piston body 31 is driven to move forward along the piston chamber 11 through the push - rod body 32, and then the piston oil seal 33 on the piston body 31 pushes the brake oil forward.

[0052] Furthermore, refer to Figure 5 、 Figure 7, the front end of the push rod body 32 has a ball head section 321, the rear end of the piston body 31 has an arc-shaped groove 311, at least part of the ball head section 321 is snapped into the arc-shaped groove 311, and the front end of the elastic force relief element 4 abuts against the ball head section 321. The elastic force relief element 4 is preferably a spring. When the spring abuts against the ball head section 321, the contact between the two is more stable and reliable. On the other hand, since the movement direction of the brake handle 2 is different from that of the piston body 31, the cooperation between the ball head section 321 and the arc-shaped groove 311 can realize the commutation during the power transmission process and prevent jamming between components.

[0053] In some preferred embodiments of the present invention, referring to Figure 4 , Figure 9 , an elastic reset element 6 is further provided in the piston chamber 11, and the elastic reset element 6 acts on the piston push rod assembly 3 so that the piston push rod assembly 3 always has a tendency to move backward; thus, once the user releases the brake handle 2, the piston push rod assembly 3 can be automatically reset under the action of the elastic reset element 6.

[0054] It is worth mentioning that the installation position of the elastic reset element 6 is: referring to Figure 4 , the inner wall of the piston chamber 11 has a second limiting portion 112, the front end of the elastic reset element 6 abuts against the second limiting portion 112, and the rear end of the elastic reset element 6 abuts against the piston body 31.

[0055] In the present invention, referring to Figures 2 to 3 , the piston chamber 11 has a front end opening 113, a tubing joint 7 is provided at the front end opening 113, and the tubing joint 7 is detachably connected to the brake tubing. Through the brake tubing, the oil circuit between the brake master cylinder and the brake slave cylinder can be conducted to realize the brake function.

[0056] Embodiment 2

[0057] In some preferred embodiments of the present invention, referring to Figures 2 to 10 , the brake master cylinder further includes a cylinder sleeve 8, at least part of the cylinder sleeve 8 is located in the piston chamber 11, and the piston push rod assembly 3 is movably arranged in the cylinder sleeve 8.

[0058] Preferably, referring to Figure 5 , Figure 9, a third limiting portion 312 is provided on the outer periphery of the piston body 31, and the third limiting portion 312 can abut against the front end face of the cylinder liner 8. Since the elastic reset element 6 can move the piston push rod assembly 3 backward, when the third limiting portion 312 contacts the front end face of the cylinder liner 8, the cylinder liner 8 can limit the further backward movement of the piston body 31, playing a role of limiting and preventing backward movement. On the other hand, it can also be understood that when the third limiting portion 312 of the piston body 31 contacts the front end face of the cylinder liner 8, the piston body 31 is in the initial position state. On the further hand, the rear end of the piston oil seal 33 can abut against the third limiting portion 312, and the third limiting portion 312 provides structural support for the piston oil seal 33.

[0059] It should be noted that due to the arrangement of the cylinder liner 8 and at least a part of the cylinder liner 8 is located in the brake pump body 1, the force relief section 4L is located in the cylinder liner 8.

[0060] Optionally, the cylinder liner 8 and the brake pump body 1 are an integral part, for example, made of materials such as aluminum alloy and titanium alloy by turning and milling with a machine tool.

[0061] Optionally, the cylinder liner 8 and the brake pump body 1 are separate parts, and one or more first sealing rings 81 are provided between the cylinder liner 8 and the brake pump body 1 to achieve the function of sealing and leakage prevention between the cylinder liner 8 and the brake pump body 1, and can make the cylinder liner 8 and the brake pump body 1 fit tightly. The advantage of the separate parts is that the piston push rod assembly 3 and the cylinder liner 8 can be assembled outside the brake pump body 1 first and then installed together on the brake pump body 1, which is more convenient for disassembly and assembly.

[0062] On the other hand, referring to Figure 5 , Figure 7 , Figure 10 , a second sealing ring 82 is provided between the piston body 31 and the cylinder liner 8 bracket to achieve the function of sealing and leakage prevention between the cylinder liner 8 and the piston body 31, and can make the cylinder liner 8 and the piston body 31 fit tightly.

[0063] It is worth noting that other technical solutions of the present invention belong to the prior art and will not be elaborated here.

[0064] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A brake pump with a force release and fall prevention function, comprising: A brake pump body (1) is provided with a piston chamber (11), the piston chamber (11) is filled with brake oil, and the front end of the piston chamber (11) is used to connect a brake oil pipe; A brake handle (2) is drivingly connected to a piston push rod assembly (3), wherein at least a portion of the piston push rod assembly (3) extends from the back to the front into the piston cavity (11); It is characterized in that Also included are: The elastic force relief element (4) comprises a force relief section (4L) in the brake pump body (1) and connected to the piston chamber (11). The elastic force relief element (4) is arranged in the force relief section (4L) and can be deformed in the force relief section (4L). The elastic force relief element (4) acts on the piston push rod assembly (3) so that the piston push rod assembly (3) always has a tendency to move forward.

2. The brake pump with force release and anti-fall function according to claim 1, characterized in that: The piston chamber (11) has a rear end opening (111), and the piston push rod assembly (3) extends into the piston chamber (11) through the rear end opening (111); A first limiting portion (111a) is provided inwardly at the edge of the rear end opening (111), the rear end of the elastic force relief element (4) abuts against the first limiting portion (111a), and the front end of the elastic force relief element (4) abuts against the piston push rod assembly (3).

3. The brake pump with force release and anti-fall function according to claim 1, characterized in that: The piston push rod assembly (3) comprises a piston body (31), a push rod body (32) and a piston oil seal (33); The piston body (31) is movably arranged in the piston chamber (11); The front end of the push rod body (32) can abut against the piston body (31) to form a transmission fit, and the push rod body (32) forms a transmission fit with the brake handle (2) through the transmission shaft assembly (5); The piston oil seal (33) is sleeved on the piston body (31), and the piston oil seal (33) abuts against the inner wall of the piston cavity (11).

4. The brake upper pump with force release and anti-fall function according to claim 3 is characterized in that: The front end of the push rod body (32) has a ball head section (321), and the rear end of the piston body (31) has an arc groove (311). The ball head section (321) is at least partially inserted into the arc groove (311), and the front end of the elastic force relief element (4) abuts against the ball head section (321).

5. The brake upper pump with force release and anti-fall function according to claim 3 is characterized in that: An elastic reset element (6) is also provided in the piston chamber (11), and the elastic reset element (6) acts on the piston push rod assembly (3) so that the piston push rod assembly (3) always has a tendency to move backwards; The inner wall of the piston cavity (11) is provided with a second limiting portion (112), the front end of the elastic reset element (6) abuts against the second limiting portion (112), and the rear end of the elastic reset element (6) abuts against the piston body (31).

6. The brake upper pump with force release and anti-fall function according to claim 3 is characterized in that: The brake upper pump further comprises a cylinder sleeve (8), wherein the cylinder sleeve (8) is at least partially located in the piston chamber (11), and the piston push rod assembly (3) is movably arranged in the cylinder sleeve (8); A third limiting portion (312) is provided on the outer periphery of the piston body (31), and the third limiting portion (312) can abut against the front end surface of the cylinder sleeve (8).

7. The brake upper pump with force release and anti-fall function according to claim 6, characterized in that: The decompression section (4L) is located inside the cylinder sleeve (8).

8. The brake upper pump with force release and anti-fall function according to claim 6, characterized in that: The cylinder sleeve (8) and the brake pump body (1) are an integral part.

9. The brake upper pump with force release and fall prevention function according to claim 6, characterized in that: The cylinder sleeve (8) and the brake pump body (1) are separate parts, and one or more first sealing rings (81) are provided between the cylinder sleeve (8) and the brake pump body (1).

10. The brake pump with force release and fall prevention function according to claim 1, characterized in that: The piston chamber (11) has a front end opening (113), and an oil pipe joint (7) is provided at the front end opening (113). The oil pipe joint (7) is detachably connected to the brake oil pipe.

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