Brake upper pump with adaptive pre-pressure control function

Abstract

A brake upper pump with adaptive pre-pressure regulating function, comprising a brake pump body with a piston cavity, an oil storage cavity and a pre-pressure cavity, one side of the pre-pressure cavity being communicated with the oil storage cavity and the other side having a mounting opening; a pre-pressure mechanism assembled into the pre-pressure cavity through the mounting opening; a piston mechanism movably arranged in the piston cavity; a brake handle rotationally matched with the brake pump body, abutting against the piston mechanism and forming a transmission cooperation; an oil pipe assembly communicated with the piston cavity; a return spring acting on the piston mechanism; the pre-pressure mechanism comprising a pre-pressure base assembly, an adaptive pre-pressure valve core and a pre-pressure spring, the adaptive pre-pressure valve core being movably arranged in the pre-pressure cavity, the pre-pressure spring acting on the adaptive pre-pressure valve core so that the adaptive pre-pressure valve core always has a movement tendency of moving away from the pre-pressure base assembly, and the adaptive pre-pressure valve core acting on brake oil so that the brake oil has a movement tendency of flowing towards a brake lower pump.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic brakes, and in particular to a brake pump with adaptive pre-pressure regulation function. Background Technology

[0002] In the installation of brake cables on vehicles such as electric vehicles, bicycles, and tricycles, traditional tools such as wire cutters and wrenches are generally used in conjunction with brute force to tighten them. This traditional method of tightening the cables has many shortcomings and is difficult to operate. For example, the cables easily slip out of the wire cutters or wrenches, and it is not easy to adjust the tightness, which is particularly time-consuming and laborious. In order to pursue braking efficiency and precision, hydraulic brakes are now widely used in vehicles on the market (such as cars, motorcycles, and bicycles). The principle is that one end of a brake hose is connected to the output end of the internal hydraulic circuit of a brake lever seat, while the other end of the brake hose is connected to a disc brake. Pressing the lever can activate a piston rod in the internal hydraulic circuit, so that the pressure in the hydraulic circuit acts on the disc brake through the brake hose, thus forming the disc brake operation, also known as a hydraulic brake.

[0003] Example 1 of the prior art, referring to patent document CN221665161U, discloses an oil seal anti-scratch structure for a brake upper pump, including a brake pump body, a brake handle, and a piston push rod assembly; the brake pump body has a pressure cylinder and an oil reservoir, the oil reservoir being connected to the pressure cylinder through an oil inlet, and the piston push rod assembly extending at least partially into the pressure cylinder; the pressure cylinder is divided into a front cylinder section and a rear cylinder section, with a transition section formed between the front and rear cylinder sections; the oil inlet is located on the transition section, and the radial dimension of the transition section is larger than the radial dimension of the front cylinder section; the piston push rod assembly has a first support part and a second support part arranged from back to front, and a piston oil seal is provided between the first support part and the second support part. Example 2 of the prior art, referring to patent document CN221723289U, discloses a brake pump for reducing brake pad replacement costs, including a pump body with a mounting hole; a piston assembly; a brake pad assembly detachably disposed in a hollow chamber, with an accommodating gap between the brake pad assembly and the piston assembly; a heat sink separately formed from the brake pad assembly; a reset spring that acts on the brake pad assembly to ensure that the brake pad assembly always has a tendency to move outward; the heat sink includes a heat-conducting part and a heat-dissipating part, the heat-conducting part being located in the hollow chamber and the heat-dissipating part extending out of the pump body, and the heat-conducting part having a first connecting hole; the brake pad assembly abutting against the heat-conducting part, and the brake pad assembly having a second connecting hole; the first connecting hole, the second connecting hole, and the mounting hole are arranged in the same direction and are assembled together by the same connecting pin.

[0004] Observing the schemes in Examples 1 and 2, it can be seen that the upper brake pump is connected to the lower brake pump via an oil pipe, forming a hydraulic circuit for the flow of internal brake fluid. Specifically, when the user squeezes the brake, the brake fluid in the upper brake pump flows into the lower brake pump, thereby pushing the brake pads in the lower brake pump, which in turn clamp the brake disc, achieving an effective braking effect. However, as is well known, brake pads wear down during use, resulting in a greater amount of oil being pushed (i.e., a greater piston movement) to achieve the same braking effect. In addition, brake fluid inevitably experiences some loss during use, leading to more gaps in the hydraulic circuit after loss, resulting in a loose feel during use and unstable assist effect on the brake pads. Furthermore, once the brake fluid is lost, the user can only solve the problem by refilling the hydraulic circuit, which is very cumbersome. Moreover, in the existing structure, the pressure in the hydraulic circuit is at a low level when not braking, so it cannot provide sufficient preload to the brake pads (piston push rod assembly), resulting in a more noticeable slamming sensation when the user squeezes the lever. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a brake pump with adaptive pre-pressure regulation function.

[0006] The technical solution of this utility model to solve its technical problem is: a brake upper pump with adaptive pre-pressure regulation function, comprising:

[0007] The brake pump body has a piston chamber, an oil reservoir chamber, and a pre-compression chamber. The piston chamber and the oil reservoir chamber are filled with brake fluid, and the oil reservoir chamber is connected to the piston chamber through an oil return hole. One side of the pre-compression chamber is connected to the oil reservoir chamber, and the other side has an installation opening.

[0008] The pre-compression mechanism is assembled into the pre-compression cavity through an installation opening;

[0009] A piston mechanism, which is movably configured in the piston chamber;

[0010] The brake handle is pivotally coupled to the brake pump body via a pivoting mechanism, and the brake handle is coupled to the piston mechanism via a rotary pushing mechanism, forming a transmission engagement.

[0011] The oil line assembly has one end connected to the piston chamber and the other end connected to the brake down-pump.

[0012] The return spring applies a backward elastic force to the piston mechanism;

[0013] The pre-compression mechanism includes a pre-compression base assembly, an adaptive pre-compression valve core, and a pre-compression spring, wherein the pre-compression base assembly is connected to the mounting opening, the adaptive pre-compression valve core is movably disposed in the pre-compression chamber, and the pre-compression spring abuts between the pre-compression base assembly and the adaptive pre-compression valve core.

[0014] The preload spring acts on the adaptive preload valve core so that the adaptive preload valve core always has a tendency to move away from the preload base assembly, and the adaptive preload valve core acts on the brake fluid so that the brake fluid has a tendency to flow towards the brake pump side.

[0015] Optionally, the adaptive pre-pressure valve core is fitted with a plurality of valve core sealing rings, which contact the inner wall of the pre-pressure chamber to form a sealing fit between the adaptive pre-pressure valve core and the inner wall of the pre-pressure chamber.

[0016] The preferred configuration of the piston mechanism is that the piston mechanism includes at least a piston body, a piston oil seal disposed on the piston body, and a return spring abutting between the piston body and the inner wall of the piston cavity.

[0017] The brake handle abuts against the piston body through a rotary mechanism, forming a transmission engagement;

[0018] The piston oil seal abuts against the inner wall of the piston chamber and forms a sealing fit. An oil pushing chamber section is formed in front of the piston oil seal, and an oil replenishing chamber section is formed behind the piston oil seal. The oil replenishing chamber section is connected to the oil storage chamber through an oil replenishing hole, and the oil replenishing hole is located behind the oil return hole.

[0019] The reset spring acts on the piston body so that the piston body always has a tendency to move backward.

[0020] It should be noted that the piston oil seal moves together with the piston body. When the piston oil seal is behind the return oil hole, the pre-compression chamber is connected to the oil storage chamber through the pre-compression oil passage, and the push oil chamber section is connected to the oil storage chamber through the return oil hole, while the replenishing oil chamber section is connected to the oil storage chamber through the replenishing oil hole, so that the pre-compression chamber and the push oil chamber section are connected, and the oil storage chamber and the replenishing oil chamber section are connected. When the piston oil seal is in front of the return oil hole, the pre-compression chamber is connected to the oil storage chamber through the pre-compression oil passage, and the replenishing oil chamber section is connected to the oil storage chamber through the return oil hole and the replenishing oil hole, so that the pre-compression chamber and the replenishing oil chamber section are connected, while the pre-compression chamber and the push oil chamber section are blocked.

[0021] The preferred structural solution for the pre-compression base assembly is that the pre-compression base assembly includes an adjustable plug assembly and a connecting sleeve;

[0022] The connecting sleeve forms a detachable connection with the mounting opening through the first thread structure;

[0023] The connecting sleeve has a through hole, and the adjustable plug assembly extends into the pre-compression chamber after passing through the through hole. The adjustable plug assembly can extend forward or retract backward in the pre-compression chamber.

[0024] The adjustable plug assembly includes an adjustment operating element, an adjustable support base, and a limiting element;

[0025] The adjusting operating element has a limit groove, and the limiting element is at least partially disposed in the limit groove;

[0026] The limiting element abuts against the front end of the connecting sleeve to form a limiting fit, and the adjusting operation element abuts against the rear end of the connecting sleeve to form a limiting fit, so that the adjusting operation element can rotate relative to the connecting sleeve.

[0027] The adjustable support is connected to the adjustment operating element via a second threaded structure.

[0028] Furthermore, the adjustment operating element includes an operating section, a limiting section, and an adjustment section;

[0029] The operating section is located outside the brake pump body;

[0030] The limiting section is located in the through hole of the connecting sleeve. The front end of the limiting section forms a limiting fit with the front end of the connecting sleeve through the limiting element. The front end of the limiting section forms a limiting fit with the front end of the connecting sleeve through the first step structure.

[0031] The adjustment section extends into the pre-compression chamber and is connected to the adjustable support seat through the second threaded structure.

[0032] More specifically, the adjustable support has an adjustment hole, and the adjustment section extends at least partially into the adjustment hole;

[0033] The second thread structure includes an internal thread formed on the adjustment hole and an external thread formed on the adjustment section, wherein the internal thread and the external thread mesh with each other.

[0034] When the user rotates the adjustment element, the element rotates under the action of the limit section and the connecting sleeve. This causes the number of turns of the threaded engagement between the adjustable support and the adjustment section to change, allowing the adjustable support to move forward or backward in the preload chamber.

[0035] In some preferred embodiments of this utility model, one or more gap grooves are provided on the limiting section, and an elastic pre-tightening component is provided on the connecting sleeve, the elastic pre-tightening component being able to be engaged into any one of the gap grooves.

[0036] Specifically, the elastic preload assembly includes a preload screw, a first preload spring, and a preload top ball;

[0037] The connecting sleeve is provided with a pre-tightening hole, and the pre-tightening screw is threaded into the pre-tightening hole;

[0038] A portion of the pre-tightening top bead is located inside the pre-tightening hole, while the other portion extends out of the pre-tightening hole and can be engaged in the gap groove;

[0039] The first preload spring is located inside the preload hole and abuts against the preload screw and the preload ball.

[0040] The beneficial effects of this utility model are as follows:

[0041] First, the internal cavity structure of the brake pump has been optimized. In addition to the original piston chamber and reservoir chamber, a pre-compression chamber has been added, creating a three-chamber structure within the brake pump body, forming an interconnected oil passage within the upper brake pump. Through the pre-compression mechanism, the brake fluid is pushed, increasing the oil pressure in the oil passage. This ensures that the brake fluid in the upper brake pump (pre-compression chamber, reservoir chamber, and piston chamber) always tends to flow towards the lower brake pump, thus consistently providing a certain pre-pressure to the brake pads (piston pushrod assembly). This partially offsets the negative impacts of brake pad wear and brake fluid loss, balancing the loose feel. Furthermore, with the assistance of pre-compression, the initial grip of the brake lever is softer and more comfortable, eliminating the feeling of hitting a wall.

[0042] Second, it features an adaptive pressure balancing function during use. Specifically, the pre-pressure base assembly is fixed relative to the pre-pressure chamber, but the adaptive pre-pressure valve core is movable. It will adaptively move and adjust to a balanced position based on the pressure difference between the two ends (one end is the elastic force applied by the pre-pressure spring, and the other end is the liquid pressure provided by the brake fluid in the pre-pressure chamber). In other words, if the liquid pressure provided by the brake fluid in the pre-pressure chamber is greater than the elastic force applied by the pre-pressure spring, the adaptive pre-pressure valve core will move closer to the pre-pressure base assembly and compress the pre-tension spring to provide a greater elastic force. When the forces on both ends of the adaptive pre-pressure valve core are equal, the adaptive pre-pressure valve core stops moving. If the liquid pressure provided by the brake fluid in the pre-pressure chamber is less than the elastic force applied by the pre-pressure spring, the adaptive pre-pressure valve core will move away from the pre-pressure base assembly, and the pre-tension spring will extend to provide a smaller elastic force. When the forces on both ends of the adaptive pre-pressure valve core are equal, the adaptive pre-pressure valve core stops moving.

[0043] Third, the pre-compression chamber provides a larger oil storage space, allowing for the storage of more brake fluid. Even with minor brake fluid loss, the pre-compression ensures that the braking feel remains consistent and reliable, without a significant decrease in quality. If the brake fluid loss reaches a certain level, the position of the pre-compression mechanism can be adjusted to compress the working volume of the pre-compression chamber, shortening the actual working oil path in the brake pump. This fills the gaps caused by fluid loss, ensuring good braking performance and a satisfying braking feel even without refilling.

[0044] Fourth, during the commissioning and installation phase before using the brake pump, the position of the adjustable support in the pre-pressure chamber is changed by operating the control elements, thereby adjusting the initial state of the adaptive pre-pressure valve core to allow different users to find their most suitable state. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of this utility model.

[0046] Figure 2 This is an exploded view of the pre-compression mechanism in this utility model.

[0047] Figure 3 This is a cross-sectional view of the present invention (piston mechanism in idle stroke).

[0048] Figure 4 This is a cross-sectional view of the present invention (when the piston mechanism is pushed forward).

[0049] Figure 5 This is a schematic diagram of the adjustable support base in Embodiment 3 when it is adjusted to the forward position.

[0050] Figure 6 This is a schematic diagram of the adjustable support base in Embodiment 3 when it is adjusted to the rear position.

[0051] Figure 7 This is a schematic diagram showing the interaction between the adjustable operating element and the elastic preload assembly.

[0052] Figure 8 This is a structural diagram of the connecting sleeve.

[0053] In the diagram: 1. Brake pump body; 11. Piston chamber; 111. Pushing chamber section; 112. Replenishing chamber section; 12. Oil reservoir; 13. Pre-compression chamber; 131. Mounting opening; 132. Pre-compression oil passage; 14. Return oil hole; 15. Replenishing oil hole; 2. Pre-compression mechanism; 21. Pre-compression base assembly; 211. Adjustable plug assembly; 2111. Adjustable operating element; 2111a. Operating section; 2111b. Limiting section; 2111c. Adjusting section; 2111d. Limiting groove; 2111e. Clearance groove; 2112. Adjustable support base; 2112a. Adjustment hole; 211 3. Limiting element; 212. Connecting sleeve; 2121. Through hole; 2122. Preload hole; 213. First thread structure; 214. Second thread structure; 216. First step structure; 217. Second step structure; 22. Adaptive preload valve core; 23. Preload spring; 24. Valve core sealing ring; 25. Elastic preload assembly; 251. Preload screw; 252. First preload spring; 253. Preload top ball; 3. Piston mechanism; 31. Piston body; 32. Piston oil seal; 4. Brake handle; 41. Pivoting mechanism; 42. Rotation mechanism; 5. Oil pipe assembly; 6. Return spring. Detailed Implementation

[0054] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0055] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] Example 1

[0058] Reference Figures 1 to 8 A brake pump with adaptive pre-pressure regulation function includes: a brake pump body 1, which has a piston chamber 11, an oil reservoir 12, and a pre-pressure chamber 13, wherein the piston chamber 11 and the oil reservoir 12 are filled with brake fluid, and the oil reservoir 12 is connected to the piston chamber 11 through an oil return hole 14; one side of the pre-pressure chamber 13 is connected to the oil reservoir 12, and the other side has an installation opening 131; a pre-pressure mechanism 2, which is assembled into the pre-pressure chamber 13 through the installation opening 131; and a piston mechanism 3, which is movably configured. In the piston chamber 11; the brake handle 4, which is rotated with the brake pump body 1 through the pivoting mechanism 41 (similar to the prior art, not described in detail), and the brake handle 4 is abutted against the piston mechanism 3 through the push mechanism 42 (similar to the prior art, not described in detail) and forms a transmission engagement; the oil pipe assembly 5, one end of which is connected to the piston chamber 11, and the other end is connected to the brake lower pump (consistent with the prior art, so only a part is shown in the figure); the return spring 6, which applies a backward elastic force to the piston mechanism 3.

[0059] It should be noted that the pre-pressure mechanism 2 includes a pre-pressure base assembly 21, an adaptive pre-pressure valve core 22, and a pre-pressure spring 23. The pre-pressure base assembly 21 is connected to the mounting opening 131. The adaptive pre-pressure valve core 22 is movably disposed in the pre-pressure chamber 13. The pre-pressure spring 23 abuts between the pre-pressure base assembly 21 and the adaptive pre-pressure valve core 22. The pre-pressure spring 23 acts on the adaptive pre-pressure valve core 22 so that the adaptive pre-pressure valve core 22 always has a tendency to move away from the pre-pressure base assembly 21. The adaptive pre-pressure valve core 22 acts on the brake fluid so that the brake fluid has a tendency to flow towards the brake pump side.

[0060] The above description constitutes the basic solution of this utility model, which has numerous innovative features, including at least the following: First, it optimizes the cavity structure within the brake pump body 1. Based on the original piston chamber 11 and oil reservoir 12, a pre-pressure chamber 13 is added, forming a three-cavity structure within the brake pump body 1, creating interconnected oil passages in the upper brake pump. Furthermore, through the pre-pressure mechanism 2, the brake fluid is pushed, increasing the oil pressure in the oil passage. This ensures that the brake fluid in the upper brake pump (pre-pressure chamber 13, oil reservoir 12, and piston chamber 11) always tends to flow towards the lower brake pump, thus consistently providing a certain pre-pressure to the brake pads (piston push rod assembly). This partially offsets the negative impacts of brake pad wear and brake fluid loss, balancing the loose feel. Moreover, with the assistance of the pre-pressure, the initial grip of the handle is softer and more comfortable, eliminating the feeling of hitting a wall. Secondly, it has an adaptive pressure balancing function during use. Specifically, the pre-pressure base assembly 21 is fixed relative to the pre-pressure chamber 13, but the adaptive pre-pressure valve core 22 is movable. It will adaptively move and adjust to a balanced position according to the pressure difference between the two ends (one end is the elastic force applied by the pre-pressure spring 23, and the other end is the liquid pressure provided by the brake fluid in the pre-pressure chamber 13). In other words, if the liquid pressure provided by the brake fluid in the pre-pressure chamber 13 is greater than the elastic force applied by the pre-pressure spring 23, it will cause the adaptive pre-pressure valve core 22 to move closer to the pre-pressure chamber 13. The pressure base assembly 21 moves to one side and compresses the preload spring so that the preload spring provides greater elastic force. When the forces on both ends of the adaptive preload valve core 22 are equal, the adaptive preload valve core 22 stops moving. If the liquid pressure provided by the brake fluid in the preload chamber 13 is less than the elastic force applied by the preload spring 23, the adaptive preload valve core 22 will move away from the preload base assembly 21, and the preload spring will extend so that the preload spring provides less elastic force. When the forces on both ends of the adaptive preload valve core 22 are equal, the adaptive preload valve core 22 stops moving.

[0061] Furthermore, it is worth mentioning that the brake pump of this application, through the setting of the pre-pressure chamber 13, has a larger oil storage space, which can store more brake fluid. If there is a small amount of brake fluid loss, the braking feel will not decrease significantly under the presence of pre-pressure, and the braking effect can be maintained stably and reliably. If the brake fluid loss reaches a certain level, the position of the pre-pressure mechanism 2 can be adjusted to compress the working volume of the pre-pressure chamber 13, shorten the length of the actual working oil circuit in the brake pump, and fill the gap caused by the loss. This allows for good braking performance and excellent braking feel even without adding oil.

[0062] Optionally, the adaptive pre-pressure valve core 22 is fitted with a plurality of valve core sealing rings 24, which contact the inner wall of the pre-pressure chamber 13 so that a sealing fit is formed between the adaptive pre-pressure valve core and the inner wall of the pre-pressure chamber 13, thereby preventing brake fluid from leaking from one side of the adaptive pre-pressure valve core 22 to the other side and ensuring the working reliability of the adaptive pre-pressure valve core 22.

[0063] Example 2

[0064] In this embodiment, a preferred configuration of the piston mechanism 3 is provided, specifically as follows: (Refer to...) Figure 3 The piston mechanism 3 includes at least a piston body 31 and a piston oil seal 32 disposed on the piston body 31. The brake handle 4 abuts against the piston body 31 via a rotary mechanism 42, forming a transmission engagement.

[0065] The piston oil seal 32 abuts against the inner wall of the piston chamber 11 to form a sealing fit. An oil-pushing chamber section 111 is formed in front of the piston oil seal 32, and an oil-replenishing chamber section 112 is formed behind the piston oil seal 32. The oil-replenishing chamber section 112 communicates with the oil storage chamber 12 through an oil-replenishing hole 15, and the oil-replenishing hole 15 is located behind the oil return hole 14. (Refer to...) Figure 3 When the piston body 31 moves forward, the piston oil seal 32 pushes the brake fluid in the push chamber section 111 into the reservoir chamber 12 through the return port 14, and the brake fluid in the reservoir chamber 12 is replenished into the replenishment chamber section 112 through the replenishment port 15, achieving oil circuit balance. This process is usually defined as "no-load stroke," during which the brakes do not function. (Refer to...) Figure 4 The brakes will only truly begin to function when the piston oil seal 32 is located in front of the return oil hole 14. Furthermore, the return spring 6 acts on the piston body 31, ensuring that the piston body 31 always has a tendency to move backward; that is, once the user releases the brake lever 4, the piston body 31 can quickly return to its original position under the action of the return spring 6 and the oil pressure.

[0066] It should be noted that the piston oil seal 32 moves together with the piston body 31, as shown in the reference. Figure 3 When the piston oil seal 32 is located behind the return oil hole 14, the pre-compression chamber 13 is connected to the oil storage chamber 12 through the pre-compression oil passage 132, and the push oil chamber section 111 is connected to the oil storage chamber 12 through the return oil hole 14, and the replenishment oil chamber section 112 is connected to the oil storage chamber 12 through the replenishment oil hole 15, so that the pre-compression chamber 13 and the push oil chamber section 111 are connected, and at the same time the oil storage chamber 12 and the replenishment oil chamber section 112 are connected; refer to Figure 4When the piston oil seal 32 is located in front of the return oil hole 14, the pre-compression chamber 13 is connected to the oil storage chamber 12 through the pre-compression oil passage 132, and the replenishing oil chamber section 112 is connected to the oil storage chamber 12 through the return oil hole 14 and the replenishing oil hole 15, so that the pre-compression chamber 13 and the replenishing oil chamber section 112 are connected, while the pre-compression chamber 13 is blocked from the pushing oil chamber section 111. Under both of the above working conditions, the pre-compression mechanism 2 can increase the oil pressure in the oil circuit.

[0067] Example 3

[0068] Based on the structural foundation of Embodiment 1, this embodiment provides a preferred structural scheme for the pre-compression base assembly 21, as follows: (Refer to...) Figures 3-6 The pre-compression base assembly 21 includes an adjustable plug assembly 211 and a connecting sleeve 212. The connecting sleeve 212 is detachably connected to the mounting opening 131 via a first threaded structure 213 (or a snap-fit ​​structure, magnetic structure, etc., not specifically limited here). Furthermore, the connecting sleeve 212 has a through hole 2121 through which the adjustable plug assembly 211 extends into the pre-compression chamber 13, and the adjustable plug assembly 211 can extend forward or retract backward within the pre-compression chamber 13. The connecting sleeve 212 provides a certain degree of restraint for the adjustable plug assembly 211, but does not completely constrain it. Therefore, the adjustable plug assembly 211 can extend forward (reducing the actual working volume of the pre-compression chamber 13) or retract backward (expanding the actual working volume of the pre-compression chamber 13) within the pre-compression chamber 13.

[0069] More specifically, the adjustable plug assembly 211 includes an adjustment operation element, an adjustable support base 2112, and a limiting element 2113; wherein, the adjustment operation element has a limiting groove 2111d, and the limiting element 2113 is at least partially disposed in the limiting groove 2111d, and the limiting element 2113 is preferably a retaining ring.

[0070] The limiting element 2113 abuts against the front end of the connecting sleeve 212 to form a limiting fit (which restricts the adjustable support 2112 from retracting), and the adjusting operation element abuts against the rear end of the connecting sleeve 212 to form a limiting fit (which restricts the adjustable support 2112 from advancing), so that the adjusting operation element can rotate relative to the connecting sleeve 212. On the other hand, the adjustable support 2112 is connected to the adjusting operation element through a second threaded structure 214. When the adjusting operation element rotates, the rotational power is transmitted to the adjustable support 2112 through the second threaded structure 214, causing the number of threaded turns between the adjustable support 2112 and the adjusting operation element to change, so that the adjustable support 2112 extends forward or retracts backward in the pre-compression chamber 13 to adjust the actual working volume of the pre-compression chamber 13.

[0071] During assembly, the adaptive pre-pressure valve core 22 and the pre-pressure spring 23 are first placed into the pre-pressure chamber 13. Then, the connecting sleeve 212 is put onto the adjusting operating element, and the limiting element 2113 is installed on the adjusting operating element. Next, the adjusting operating element and the adjustable support 2112 are connected and combined through the second thread structure 214. Then, the adjusting operating element and the adjustable support 2112 are sent into the pre-pressure chamber 13 together. Finally, the connecting sleeve 212 is connected and fixed to the mounting opening 131 through the first thread structure 213.

[0072] It is important to emphasize that during the commissioning and installation phase before using the brake pump, the position of the adjustable support 2112 in the pre-pressure chamber 13 can be changed by manipulating and adjusting the operating elements, thereby adjusting the initial state of the adaptive pre-pressure valve core 22 to allow different users to find their most suitable state.

[0073] Based on the foregoing, a specific structural scheme for the adjusting operating element is provided, as follows: (Refer to...) Figure 7The adjustment operation element includes an operation section 2111a, a limiting section 2111b, and an adjustment section 2111c; preferably, it is an integrally molded part with good structural integrity and strength. The operation section 2111a is located outside the brake pump body 1, facilitating user access and operation. The connecting sleeve 212 and the limiting element 2113 effectively limit the adjustment operation element by restricting the limiting section 2111b. The limiting section 2111b is located in the through hole 2121 of the connecting sleeve 212. The front end of the limiting section 2111b forms a limiting fit with the front end of the connecting sleeve 212 through the limiting element 2113, and the front end of the limiting section 2111b forms a limiting fit with the front end of the connecting sleeve 212 through a first step structure 216. On the other hand, the adjustment section 2111c extends into the pre-compression chamber 13 and is connected to the adjustable support 2112; preferably, the adjustable support 2112 has an adjustment hole 2112a, and the adjustment section 2111c extends at least partially into the adjustment hole 2112a; the second thread structure 214 includes an internal thread formed on the adjustment hole 2112a and an external thread formed on the adjustment section 2111c, the internal thread and the external thread meshing with each other. Thus, when the user rotates the adjustment operating element, the limiting section 2111b and the connecting sleeve 212 cause the adjustment operating element to rotate, thereby changing the number of threaded connections between the adjustable support 2112 and the adjustment section 2111c, so that the adjustable support 2112 moves forward or backward in the pre-compression chamber 13.

[0074] Optionally, the rear end of the connecting sleeve 212 extends forward to form a stop portion, which can (through the second step structure 217) abut against the adjustable support 2112 and form a limiting and anti-reverse engagement, thereby limiting the maximum forward distance of the adjustable support 2112 to prevent the adjustable support 2112 from moving too far forward and affecting normal use.

[0075] Example 4

[0076] During the adjustment process, the adjusting operating element needs to rotate relative to the connecting sleeve 212. Therefore, if the gap between the limiting section 2111b and the connecting sleeve 212 is too small, there will be significant resistance, leading to jamming; if the gap between the limiting section 2111b and the connecting sleeve 212 is too large, loosening and instability are likely to occur. To address these potential defects, refer to... Figures 5-8In some preferred embodiments of this utility model, the limiting section 2111b is provided with one or more gap grooves 2111e. The gap grooves 2111e allow for a more reasonable gap between the limiting section 2111b and the connecting sleeve 212, reducing the amount of contact during rotation and thus making user operation smoother. Preferably, the connecting sleeve 212 is provided with an elastic pre-tightening component 25, which can be engaged into any one of the gap grooves 2111e. Specifically, the elastic preload assembly 25 includes a preload screw 251, a first preload spring 252, and a preload ball 253. The connecting sleeve 212 has a preload hole 2122, and the preload screw 251 is threaded into the preload hole 2122. A portion of the preload ball 253 is located within the preload hole 2122, while another portion extends out of the preload hole 2122 and can be engaged in the gap groove 2111e. The first preload spring 252 is located within the preload hole 2122 and abuts against the preload screw 251 and the preload ball 253. Through the cooperation of the elastic preload assembly 25 and the gap groove 2111e, a certain preload force is provided between the limiting section 2111b and the connecting sleeve 212, preventing loosening or rotation of the two without human intervention.

[0077] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0078] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A brake upper pump with adaptive pre-pressure regulating function, comprising: a brake pump body (1) having a piston cavity (11), an oil storage cavity (12) and a pre-pressure cavity (13), the piston cavity (11) and the oil storage cavity (12) being filled with brake oil, and the oil storage cavity (12) being communicated with the piston cavity (11) through an oil return hole (14); one side of the pre-pressure cavity (13) being communicated with the oil storage cavity (12), and the other side having a mounting opening (131); a pre-pressure mechanism (2) being assembled into the pre-pressure cavity (13) through the mounting opening (131); a piston mechanism (3) being movably arranged in the piston cavity (11); a brake handle (4) being rotatably connected with the brake pump body (1) through a pivot mechanism (41), and the brake handle (4) being abutted with the piston mechanism (3) through a push mechanism (42) and being drivingly connected with the piston mechanism (3); an oil pipe assembly (5) having one end communicated with the piston cavity (11) and the other end connected with a brake lower pump; a return spring (6) applying a rear elastic force to the piston mechanism (3); characterized in that the pre-pressure mechanism (2) comprising a pre-pressure base assembly (21), an adaptive pre-pressure valve core (22) and a pre-pressure spring (23), wherein the pre-pressure base assembly (21) is connected to the mounting opening (131), the adaptive pre-pressure valve core (22) is movably arranged in the pre-pressure cavity (13), and the pre-pressure spring (23) is abutted between the pre-pressure base assembly (21) and the adaptive pre-pressure valve core (22); the pre-pressure spring (23) acting on the adaptive pre-pressure valve core (22) so that the adaptive pre-pressure valve core (22) always has a movement tendency of moving away from the pre-pressure base assembly (21), and the adaptive pre-pressure valve core (22) acts on the brake oil so that the brake oil has a movement tendency of flowing towards the brake lower pump.

2. The brake on pump with adaptive pre-pressure regulation function according to claim 1, characterized in that: a plurality of valve core sealing rings (24) being sleeved on the adaptive pre-pressure valve core (22), and the valve core sealing rings (24) being in contact with the inner wall of the pre-pressure cavity (13) so as to form a sealing fit between the adaptive pre-pressure valve core and the inner wall of the pre-pressure cavity (13).

3. The brake on pump with adaptive pre-pressure regulation function according to claim 1, characterized in that: the piston mechanism (3) at least comprising a piston body (31) and a piston oil seal (32) arranged on the piston body (31); the brake handle (4) being abutted with the piston body (31) through the push mechanism (42) and being drivingly connected with the piston body (31); the piston oil seal (32) being abutted with the inner wall of the piston cavity (11) and forming a sealing fit, a front of the piston oil seal (32) forming a push oil cavity section (111), and a rear of the piston oil seal (32) forming a make-up oil cavity section (112), the make-up oil cavity section (112) being communicated with the oil storage cavity (12) through a make-up oil hole (15), and the make-up oil hole (15) being located behind the oil return hole (14).

4. The brake apply pump with adaptive pre-pressure regulation function according to claim 3, characterized in that: The piston oil seal (32) moves along with the piston body (31), when the piston oil seal (32) is located behind the oil return hole (14), the pre-pressing cavity (13) is communicated with the oil storage cavity (12) through the pre-pressing oil channel (132), and the oil pushing cavity section (111) is communicated with the oil storage cavity (12) through the oil return hole (14), and the oil supplementing cavity section (112) is communicated with the oil storage cavity (12) through the oil supplementing hole (15), so that the pre-pressing cavity (13) is communicated with the oil pushing cavity section (111), and the oil storage cavity (12) is communicated with the oil supplementing cavity section (112); when the piston oil seal (32) is located in front of the oil return hole (14), the pre-pressing cavity (13) is communicated with the oil storage cavity (12) through the pre-pressing oil channel (132), and the oil supplementing cavity section (112) is communicated with the oil storage cavity (12) through the oil return hole (14) and the oil supplementing hole (15), so that the pre-pressing cavity (13) is communicated with the oil supplementing cavity section (112), and the pre-pressing cavity (13) is blocked with the oil pushing cavity section (111).

5. The brake on-pump with self-adapting pre-pressure regulation function according to any one of claims 1-4, characterized in that: The pre-pressing base assembly (21) comprises an adjustable plug assembly (211) and a connecting sleeve (212); The connecting sleeve (212) is detachably connected with the mounting opening (131) through the first threaded structure (213); The connecting sleeve (212) has a through hole (2121), the adjustable plug assembly (211) extends into the pre-pressing cavity (13) through the through hole (2121), and the adjustable plug assembly (211) can extend forward or retract backward in the pre-pressing cavity (13).

6. The brake apply pump with adaptive pre-pressure regulation function according to claim 5, wherein: The adjustable plug assembly (211) comprises an adjusting operation element, an adjustable support seat (2112) and a limiting element (2113); The adjusting operation element is provided with a limiting groove (2111d), and the limiting element (2113) is at least partially arranged in the limiting groove (2111d); The limiting element (2113) abuts against the front end of the connecting sleeve (212) and forms a limiting fit, and the adjusting operation element abuts against the rear end of the connecting sleeve (212) and forms a limiting fit, so that the adjusting operation element rotates relative to the connecting sleeve (212); The adjustable support seat (2112) is connected with the adjusting operation element through the second threaded structure (214).

7. The brake apply pump with adaptive pre-pressure regulation function according to claim 6, characterized in that: The adjusting operation element comprises an operation section (2111a), a limiting section (2111b) and an adjusting section (2111c); The operation section (2111a) is located outside the brake pump body (1); The limiting section (2111b) is located in the through hole (2121) of the connecting sleeve (212), the front end of the limiting section (2111b) abuts against the front end of the connecting sleeve (212) through the limiting element (2113), and the front end of the limiting section (2111b) abuts against the rear end of the connecting sleeve (212) through the first step structure (216). The adjusting section (2111c) extends into the pre-pressing cavity (13) and is connected with the adjustable support base (2112) through the second threaded structure (214).

8. The brake apply pump with adaptive pre-pressure regulation function according to claim 7, characterized in that: The adjustable support base (2112) has an adjusting hole (2112a), and the adjusting section (2111c) extends into the adjusting hole (2112a) at least partially. The second threaded structure (214) comprises an inner thread formed on the adjusting hole (2112a) and an outer thread formed on the adjusting section (2111c), and the inner thread and the outer thread are engaged with each other. The user rotates the adjusting operation element, and the adjusting operation element is subjected to self-rotation movement under the action of the limiting section (2111b) and the connecting sleeve (212), and then the thread matching number of the adjustable support base (2112) and the adjusting section (2111c) is changed, so that the adjustable support base (2112) moves forward or backward in the pre-pressing cavity (13).

9. The brake apply pump with adaptive pre-pressure regulation function according to claim 7, wherein: The limiting section (2111b) is provided with one or more gap slots (2111e), and the connecting sleeve (212) is provided with an elastic pre-tightening assembly (25), and the elastic pre-tightening assembly (25) can be clamped into any one gap slot (2111e).

10. The brake apply pump with adaptive pre-pressure regulation function according to claim 9, wherein: The elastic pre-tightening assembly (25) comprises a pre-tightening screw (251), a first pre-tightening spring (252), and a pre-tightening top bead (253). The connecting sleeve (212) is provided with a pre-tightening hole (2122), and the pre-tightening screw (251) is threadedly connected in the pre-tightening hole (2122). Part of the pre-tightening top bead (253) is located in the pre-tightening hole (2122), and the other part extends out of the pre-tightening hole (2122) and can be clamped into the gap slot (2111e). The first pre-tightening spring (252) is located in the pre-tightening hole (2122), and the first pre-tightening spring (252) abuts between the pre-tightening screw (251) and the pre-tightening top bead (253).

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