A brake pump with a vehicle fall protection structure

Abstract

A brake upper pump with a vehicle fall protection structure includes a brake pump body, which has a piston cavity; a brake handle, which is pivotally connected to the brake pump body; a piston push rod assembly, which forms a transmission match with the brake handle; the piston push rod assembly includes a deformable piston body, a booster rod, a piston oil seal sleeved on the deformable piston body, and a reset member; the reset member acts on the deformable piston body; the booster rod is transmission-connected between the deformable piston body and the brake handle, and the booster rod has a ball head end, a transmission groove is opened on the deformable piston body, and the transmission groove has a plug-in opening, and the ball head end can pass through the plug-in opening and be inserted forward into the transmission groove, so that the deformable piston body wraps the ball head end. The utility model has a vehicle fall protection structure, and when the vehicle falls, the deformable piston body is subjected to force and deforms rapidly, so that the booster rod is separated from the deformable piston body, which greatly reduces the probability of the booster rod or the deformable piston body being damaged during the collision.

Description

Technical Field

[0001] The utility model relates to the technical field of brake components in vehicles, in particular to a brake upper pump with a vehicle fall protection structure. 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 bicycles and other vehicles, the device used to control the brake is the brake (commonly known as the brake handle). The brake handle is a handle used when braking. The brake handle is used in bicycle brake handles, baby stroller handles, electric vehicle brake handles, motorcycle brake handles, etc. With the continuous improvement of technology, the brakes used in bicycles and other vehicles on the market are gradually replacing the traditional brakes that rely on solid media such as steel wire for transmission, and are replaced by hydraulic brakes that use liquid media such as oil as transmission media. The most representative of these is the hydraulic brake.

[0005] The principle of hydraulic brake is to connect 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 connected with a disc brake, and 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, thus forming the operation of the disc brake. In addition, in the structure of the existing hydraulic brake, a transmission rod is connected between the handle and the piston rod to realize transmission, and a retaining spring is also set in the oil circuit of the brake to prevent the transmission rod from detaching from the oil circuit, and the existing retaining spring is installed by clamping it in a clamping groove opened in the oil circuit.

[0006] Prior art example 1, referring to patent document CN202156405U, discloses a hydraulic brake driving structure, which at least includes a seat body, a cylinder body, a piston, a connecting piece and a pressure handle. The cylinder body is accommodated in the seat body, and an annular oil replenishing space is formed between the outer wall surface of the cylinder body and the inner wall surface of the seat body. The cylinder body has a piston chamber for the piston to slide, and the piston chamber is connected to the oil replenishing space by one or more oil replenishing holes, and the pressure handle is pivotally arranged on one side of the seat body, and the actuating piston slides back and forth. In this way, since the oil replenishing space is designed in an annular shape, no matter whether the hydraulic driving structure is locked in the left section or the right section of the handle, the hydraulic oil in the oil replenishing space can flow smoothly into the piston chamber through the oil replenishing hole, so that the invention can be shared on both sides of the handle at the same time. Therefore, during manufacturing, only the same set of molds need to be used, which reduces the inventory of parts, achieves the purpose of improving economic benefits, and effectively reduces production costs. At the same time, the locking strength is good, which can effectively improve the anti-seepage effect, thereby ensuring the practicality of the braking action. From the text description and drawings of Example 1 patent, it can be seen that the existing hydraulic brake retaining springs are all tightly clamped at the opening of the brake oil circuit, but there is a problem with this setting: since bicycles and other vehicles are inevitably prone to falling during use, the fall of the vehicle will cause the hydraulic brake installed thereon to be subjected to severe impact. Once the hydraulic brake is impacted, there is a high probability that the piston rod in the oil circuit will move in the opposite direction and push the retaining spring that limits it. However, since the retaining spring is tightly clamped with the opening of the oil circuit, this will eventually cause the opening of the brake oil circuit to be shattered by the impact and cause irreversible damage, thereby causing the entire brake to be scrapped.

[0007] Prior art example 2, refer to patent document CN218641015U, which is an invention technical solution of the inventor of this case, disclosing 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 limit cavity, the limiter is in the limit cavity, and the outer side of the limit cavity is provided with an installation opening; a critical section is also provided between the inner wall of the limit cavity and the installation opening. When the hydraulic brake of the utility model is subjected to severe impact, the limiter in the limit cavity is pressed and guided by the critical section to detach from the limit cavity from the installation opening, thereby preventing irreversible damage caused by collision and extrusion, and effectively increasing the service life of the hydraulic brake. Through the analysis of the text description and drawings of the patent of Example 2, combined with actual production and user feedback, it is concluded that Example 2 has certain defects, for example: 1. In terms of structure, a separate limiter is used to limit the transmission rod. When subjected to force impact, the limiter must first be separated from the installation opening to release the limit on the rearward movement of the transmission rod. The stability during operation is poor, and the limiter often fails to disengage even when the force exceeds the critical value, so that the transmission rod is still limited and eventually damaged; 2. In the process of extreme car crashes, the time consumed by the disengagement of the limiter will extend the time it takes for the transmission rod to release the limit, thereby increasing the probability of damage to the transmission rod; 3. There is a gap between the transmission rod and the piston, which makes the actual operation feel loose and causes unnecessary idle travel; 4. There are many parts, which is not convenient for production and assembly, and the user needs to assemble multiple parts by himself after the crash, which is more troublesome; 5. Although the transmission rod is protected from damage to a certain extent, the limiter is sacrificed, making the limiter a consumable part during use. Summary of the invention

[0008] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a brake upper pump with a vehicle fall protection structure.

[0009] The utility model solves the technical problem by providing a brake upper pump with a vehicle fall protection structure, comprising:

[0010] a brake pump body having a piston chamber;

[0011] A brake handle pivotally connected to the brake pump body;

[0012] A piston push rod assembly, which forms a transmission fit with the brake handle and at least partially extends into the piston cavity;

[0013] The piston push rod assembly includes a deformable piston body, a booster rod, a piston oil seal sleeved on the deformable piston body, and a reset member;

[0014] The reset member acts on the deformable piston body so that the deformable piston body always has a tendency to move backwards;

[0015] The booster rod is transmission-connected between the deformable piston body and the brake handle, and the booster rod has a ball head end. The deformable piston body is provided with a transmission groove, and the transmission groove has a plug-in opening. The ball head end can pass through the plug-in opening and be inserted forward into the transmission groove, so that the deformable piston body wraps the ball head end.

[0016] When the brake handle is subjected to impact force, the brake handle drives the booster rod to move backward and squeeze the deformable piston body. The deformable piston body is deformed to cause the plug opening to open, so that the ball head end of the booster rod passes through the plug opening and disengages from the transmission groove backward.

[0017] Preferably, the maximum dimension of the ball head end is larger than the dimension of the plug opening.

[0018] In some preferred embodiments of the utility model, a limiting groove is provided in the piston cavity, a retaining spring is embedded in the limiting groove, and the retaining spring is located at the rear end of the deformable piston body.

[0019] Furthermore, an annular gasket is filled between the retaining spring and the deformable piston body.

[0020] In some preferred embodiments of the utility model, a pre-tightening mechanism is also included. The ball head end and the transmission groove form a clearance fit. The pre-tightening mechanism acts on the ball head end to eliminate the fit clearance between the ball head end and the transmission groove.

[0021] Furthermore, the pre-tightening mechanism includes a receiving groove opened at the front end of the transmission groove, and a pre-tightening spring arranged in the receiving groove, and the pre-tightening spring abuts between the ball head section and the inner wall of the receiving groove.

[0022] More preferably, the preload mechanism further comprises a contact ball, and the contact ball abuts between the ball head section and the preload spring.

[0023] In the utility model, the reset member is a reset spring, and the reset spring abuts between the front end of the deformable piston body and the inner wall of the piston cavity.

[0024] Preferably, the transmission groove is in a spherical shape that matches the ball head end.

[0025] Preferably, the deformable piston body is made of shape memory alloy.

[0026] The beneficial effects of the utility model are:

[0027] 1. It has a fall protection structure. When the vehicle falls, the deformable piston body is deformed quickly under force, so that the booster rod (brake handle) is separated from the deformable piston body. At this time, the booster rod is no longer constrained and can move freely to remove the impact force, which greatly reduces the probability of damage to the booster rod or the deformable piston body during the collision, making the brake pump more fall-resistant and durable.

[0028] Second, the booster rod directly interacts with the deformable piston body, and there is no intermediate transition transmission part (limiting part). Therefore, the disengagement action can be achieved more quickly in the event of a fall, further reducing the probability of component damage.

[0029] Third, there are fewer parts, which is convenient for production, manufacturing and assembly. Moreover, it is very convenient for users to reassemble the booster rod after a crash.

[0030] 4. During the fall protection process, all parts are not sacrificed, so they are not easily damaged, reducing the user's maintenance costs.

[0031] 5. The preload spring is set so that it can always contact the ball head end and exert a spring force, thereby eliminating the matching clearance between the ball head end and the transmission groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a partial structural schematic diagram of the utility model.

[0033] Figure 2 It is a partial structural sectional view and a partial enlarged view of the utility model (when assembled).

[0034] Figure 3 It is a partial structural sectional view and a partial enlarged view of the utility model (during a crash).

[0035] Figure 4 It is a partial structural sectional view and a partial enlarged view of the utility model (after the vehicle falls).

[0036] Figure 5 It is a partial structural sectional view and a partial enlarged view of the utility model (when the brake is used).

[0037] Figure 6 It is an exploded view of the local structure of the utility model.

[0038] Figure 7 It is a structural schematic diagram of a movable and deformable piston body in the utility model.

[0039] Figure 8 It is a cross-sectional view of a brake upper pump in the prior art and a partial enlarged view thereof.

[0040] In the figure: 1. brake pump body; 11. piston chamber; 12. limit groove; 2. brake handle; 3. piston push rod assembly; 31. deformable piston body; 31a. deformation section; 311. transmission groove; 312. plug-in opening; 32. booster rod; 321. ball head end; 33. piston oil seal; 34. reset member; 4. retaining spring; 5. annular gasket; 6. fitting clearance; 7. preload mechanism; 71. accommodating groove; 72. preload spring; 73. contact ball. DETAILED DESCRIPTION

[0041] 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 solution of the present invention, and should not be regarded as limiting the present invention.

[0042] 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, and do not indicate or imply 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.

[0043] 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 it can be indirectly connected 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.

[0044] Embodiment 1

[0045] Reference Figures 1 to 8 , a brake pump with a vehicle fall protection structure, comprising:

[0046] The brake pump body 1 has a piston chamber 11, and the piston chamber 11 needs to be filled with brake oil when in use;

[0047] A brake handle 2, which is pivotally connected to the brake pump body 1;

[0048] A piston push rod assembly 3, which forms a transmission fit with the brake handle 2 and at least partially extends into the piston cavity 11;

[0049] The piston push rod assembly 3 includes a deformable piston body 31, an auxiliary push rod 32, a piston oil seal 33 sleeved on the deformable piston body 31, and a reset member 34;

[0050] The reset member 34 acts on the deformable piston body 31 so that the deformable piston body 31 always has a tendency to move backwards;

[0051] The booster rod 32 is transmission-connected between the deformable piston body 31 and the brake handle 2, and the booster rod 32 has a ball head end 321. The deformable piston body 31 is provided with a transmission groove 311, and the transmission groove 311 has a plug opening 312. The ball head end 321 can pass through the plug opening 312 and be inserted forward into the transmission groove 311, so that the deformable piston body 31 wraps the ball head end 321. Preferably, the transmission groove 311 is spherical and matches the ball head end 321, and the maximum size of the ball head end 321 is larger than the size of the plug opening 312, so as to achieve a better wrapping effect.

[0052] The above content is the basic structural scheme of the utility model, and the working principle of the vehicle fall protection is: Figure 1 to Figure 3 When the brake handle 2 is subjected to an impact force (the direction of the impact force is almost opposite to the direction of the braking force), the brake handle 2 drives the booster rod 32 to move backward and squeeze the deformable piston body 31. After the deformable piston body 31 is deformed, the plug-in opening 312 opens (at this time, a deformation section 31a will be generated on the deformable piston body 31), so that the ball head end 321 of the booster rod 32 passes through the plug-in opening 312 and disengages from the transmission groove 311 backward, and the deformable piston body 31 remains in the piston cavity 11, and the booster rod 32 is disengaged from the deformable piston body 31. At this time, the booster rod 32 is no longer constrained and can move freely to remove the impact force, thereby greatly reducing the probability of damage to the booster rod 32 or the deformable piston body 31 during the impact.

[0053] After the impact, the user can align the ball head end 321 of the booster rod 32 with the transmission groove 311 and squeeze it into place. During the insertion process, the deformable piston body 31 is deformed and causes the plug-in opening 312 to open, so that the ball head end 321 can smoothly enter the transmission groove 311. After assembly, the deformable piston body 31 restores and wraps the ball head end 321 to prevent the booster rod 32 from being separated from the deformable piston body 31 under the action of non-external forces (such as impact force).

[0054] The working principle of the brake itself is as follows: Figure 2 , Figure 5The user squeezes the brake handle 2 to transmit the force to the deformable piston body 31 through the booster rod 32, so that the deformable piston body 31 moves forward along the piston cavity 11, and the brake oil in the piston cavity 11 is transported forward to the brake pump through the piston oil seal 33 to achieve the braking effect.

[0055] Preferably, the reset member 34 is a reset spring, and the reset spring abuts between the front end of the deformable piston body 31 and the inner wall of the piston chamber 11. When the user squeezes the brake handle 2, the movement of the deformable piston body 31 will cause the reset spring to contract and accumulate elastic reset force; therefore, once the user releases the brake handle 2, the elastic reset force of the reset spring acts on the deformable piston body 31 and realizes the backward movement and reset of the deformable piston body 31.

[0056] It is worth mentioning that the deformable piston body 31 is made of various materials. The deformable piston body 31 is made of shape memory alloy, such as nickel-titanium memory alloy, copper-aluminum-zinc memory alloy, iron-based memory alloy, etc., which are not specifically limited here. Of course, the deformable piston body 31 can also be made of non-alloy materials, such as silicone, plastic, etc.

[0057] In some preferred structures of the utility model, a limit groove 12 is provided in the piston cavity 11, and a retaining spring 4 is embedded in the limit groove 12, and the retaining spring 4 is located at the rear end of the deformable piston body 31. The retaining spring 4 effectively limits and retains the deformable piston body 31, preventing the deformable piston body 31 from detaching from the piston cavity 11 after assembly. Furthermore, an annular gasket 5 is filled between the retaining spring 4 and the deformable piston body 31, so as to play a role of good sealing, structural buffer protection, and gap filling between the retaining spring 4 and the deformable piston body 31.

[0058] Embodiment 2

[0059] When the ball head end 321 is assembled in the transmission groove 311, if there is a gap between the two, the fitting accuracy is insufficient, which may easily lead to a loose feel; if the two fit too tightly, there will be a certain friction. The existence of friction makes it more difficult for the boost rod 32 to disengage when the vehicle falls, thereby reducing the actual effect of the vehicle fall protection structure.

[0060] Based on the structure of the first embodiment, this embodiment provides a solution to the above problem, which is as follows: Figure 2 to Figure 4 , Figure 6 The brake upper pump also includes a pre-tightening mechanism 7. The ball head end 321 forms a clearance fit with the transmission groove 311. The pre-tightening mechanism 7 acts on the ball head end 321 to eliminate the fitting clearance 6 between the ball head end 321 and the transmission groove 311.

[0061] Furthermore, the preload mechanism 7 preferably comprises a receiving groove 71 provided at the front end of the transmission groove 311, and a preload spring 72 provided in the receiving groove 71, wherein the preload spring 72 abuts between the ball head section and the inner wall of the receiving groove 71. The preload spring 72 is provided so that it can always abut against the ball head end 321 and exert a spring force, thereby eliminating the matching gap 6 between the ball head end 321 and the transmission groove 311.

[0062] Another explanation for the situation is that due to the precision deviation in the production of parts, the deviation in assembly precision, or the deviation in fitting precision after the parts are worn out after long-term use, the preload spring 72 can effectively eliminate the precision deviation defects, so that the booster rod 32 and the deformable piston body 31 always have a relatively tight fit, and there is no friction resistance. Therefore, when the structure of the preload spring 72 is used in the event of a fall, it can be separated and escaped more smoothly, which plays a good protective role.

[0063] More preferably, the preload mechanism 7 further includes a contact ball 73, and the contact ball 73 abuts between the ball head section and the preload spring 72. Since the wire diameter of the preload spring 72 is not large, it may be unstable when it contacts the ball head end 321. Therefore, by using the contact ball 73 as a transmission transition medium, a stable point contact can always be formed between the ball head end 321 and the contact ball 73, and the size of the contact ball 73 is set to match the preload spring 72, so that the preload spring 72 can better act on the ball head end 321.

[0064] It is worth noting that other technical solutions of the present invention belong to the prior art and will not be described in detail.

[0065] 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 protection scope of the present invention.

Claims

1. A brake pump with a vehicle fall protection structure, comprising: A brake pump body (1) having a piston chamber (11); A brake handle (2) pivotally connected to the brake pump body (1); A piston push rod assembly (3) which forms a transmission fit with the brake handle (2) and at least partially extends into the piston cavity (11); It is characterized in that The piston push rod assembly (3) comprises a deformable piston body (31), a booster rod (32), a piston oil seal (33) sleeved on the deformable piston body (31), and a reset member (34); The reset member (34) acts on the deformable piston body (31) so that the deformable piston body (31) always has a tendency to move backwards; The booster rod (32) is transmission-connected between the deformable piston body (31) and the brake handle (2), and the booster rod (32) has a ball head end (321). The deformable piston body (31) is provided with a transmission groove (311), and the transmission groove (311) has a plug-in opening (312). The ball head end (321) can pass through the plug-in opening (312) and be inserted forward into the transmission groove (311), so that the deformable piston body (31) wraps the ball head end (321); When the brake handle (2) is subjected to an impact force, the brake handle (2) drives the booster rod (32) to move backward and squeeze the deformable piston body (31), and the deformable piston body (31) is deformed, causing the plug-in opening (312) to open, so that the ball head end (321) of the booster rod (32) passes through the plug-in opening (312) and disengages from the transmission groove (311) backward.

2. The brake pump with a vehicle fall protection structure according to claim 1, characterized in that: The maximum size of the ball head end (321) is greater than the size of the insertion opening (312).

3. The brake pump with a vehicle fall protection structure according to claim 1, characterized in that: A limiting groove (12) is provided in the piston cavity (11), a retaining spring (4) is embedded in the limiting groove (12), and the retaining spring (4) is located at the rear end of the deformable piston body (31).

4. The brake upper pump with a vehicle fall protection structure according to claim 3, characterized in that: An annular gasket (5) is also filled between the retaining clip (4) and the deformable piston body (31).

5. The brake pump with a vehicle fall protection structure according to claim 1, characterized in that: It also includes a pre-tightening mechanism (7), the ball head end (321) and the transmission groove (311) form a clearance fit, and the pre-tightening mechanism (7) acts on the ball head end (321) to eliminate the fitting clearance (6) between the ball head end (321) and the transmission groove (311).

6. The brake upper pump with a vehicle fall protection structure according to claim 5, characterized in that: The preload mechanism (7) comprises a receiving groove (71) provided at the front end of the transmission groove (311), and a preload spring (72) arranged in the receiving groove (71), wherein the preload spring (72) abuts between the ball head section and the inner wall of the receiving groove (71).

7. The brake upper pump with a vehicle fall protection structure according to claim 6, characterized in that: The preload mechanism (7) further comprises a contact ball (73), wherein the contact ball (73) abuts between the ball head section and the preload spring (72).

8. The brake pump with a vehicle fall protection structure according to claim 1, characterized in that: The reset member (34) is a reset spring, and the reset spring abuts between the front end of the deformable piston body (31) and the inner wall of the piston chamber (11).

9. The brake pump with a vehicle fall protection structure according to claim 1, characterized in that: The transmission groove (311) is in a spherical shape that matches the ball head end (321).

10. The brake upper pump with a vehicle fall protection structure according to any one of claims 1 to 9, characterized in that: The deformable piston body (31) is made of shape memory alloy.

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