Brake pipe joint structure

Abstract

A kind of oil pipe joint structure of brake, including brake pump body, it is opened with piston cavity, oil storage cavity and connecting pipe cavity, oil storage cavity is communicated with piston cavity, connecting pipe cavity is communicated with piston cavity, and there is connecting pipe opening;Piston push rod assembly is located in piston cavity;Brake handle is rotatably connected with brake pump body;Oil pipe assembly is detachably connected to brake pump body, and is communicated with piston cavity after passing through connecting pipe cavity;Oil pipe assembly includes sealing section, limiting section and outer section;Sealing section is located in connecting pipe cavity, the outer wall of sealing section is sealed with the inner wall of connecting pipe cavity by sealing assembly;Limiting section is located in connecting pipe cavity, the outer wall of limiting section is limited with the inner wall of connecting pipe cavity by clamping assembly and prevents the cooperation of falling off.The present application is set up by subarea in structure space, eliminates the mutual interference between sealing structure and limiting prevent the structure of falling off, by physical structure double guarantee (sealing and limiting), reduce brake system failure risk.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic brakes, and in particular to a brake oil pipe joint structure. Background Technology

[0002] In vehicles such as bicycles, the device used to control braking is called a brake lever (commonly known as a brake handle). A brake lever is a handle used when braking, and it's found on bicycle brake levers, children's bicycle brake levers, electric vehicle brake levers, motorcycle brake levers, etc. Traditionally, during the installation of brake cables on electric vehicles, bicycles, tricycles, etc., wire cutters, wrenches, and other traditional tools are 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 from the wire cutters or wrenches, and it's not easy to adjust the tightness, making it particularly time-consuming and laborious. To achieve 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 line is connected to the output end of the internal hydraulic circuit of a brake lever seat, while the other end of the brake line is connected to a disc brake. Pressing the lever actuates a piston rod in the internal hydraulic circuit, causing the pressure in the hydraulic circuit to act on the disc brake through the brake line, thus creating the disc brake operation.

[0003] The connection structure between the oil pipe assembly and the brake pump body includes two parts (a sealing structure and a limiting and anti-detachment structure). In the traditional solution, the sealing structure and the limiting and anti-detachment structure are composed of one or more sealing rings. Therefore, since the sealing ring bears the sealing pressure, it also bears the limiting and anti-detachment pressure. The sealing ring will inevitably be worn during use. Therefore, this type of traditional structure solution is poor in terms of durability and reliability.

[0004] Another solution on the market uses a sealing ring to achieve the sealing function and a snap ring structure to achieve the limiting and anti-disengagement function. However, its drawback is that the sealing ring and the snap ring are set and function in the same or similar positions. Since the sealing ring will inevitably be damaged by aging, deformation and other damage during use, it will not only cause the sealing function to fail, but also increase the space gap, which will affect the limiting and anti-disengagement function of the snap ring. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a brake oil pipe joint structure.

[0006] The technical solution of this utility model to solve its technical problem is: a brake oil pipe joint structure, comprising:

[0007] The brake pump body has a piston chamber, an oil reservoir chamber and a connecting pipe chamber. The oil reservoir chamber is connected to the piston chamber through a first oil hole, and the connecting pipe chamber is connected to the piston chamber through a second oil hole. The connecting pipe chamber has a connecting pipe opening.

[0008] A piston push rod assembly located within the piston chamber;

[0009] The brake lever is pivotally coupled to the brake pump body via a pivoting mechanism.

[0010] The oil line assembly is detachably connected to the brake pump body and communicates with the piston chamber after passing through the pipe chamber;

[0011] The tubing assembly includes at least a sealing section, a limiting section, and an external section;

[0012] The sealing section is located in the pipe cavity, and the outer wall of the sealing section forms a sealing fit with the inner wall of the pipe cavity through the sealing assembly;

[0013] The limiting section is located in the tube cavity, and the outer wall of the limiting section forms a limiting and anti-detachment fit with the inner wall of the tube cavity through the locking component.

[0014] Compared to existing technologies, the above structural design primarily involves functional and spatial partitioning of the hydraulic pipe assembly, with different sections performing different functions. Specifically, the cooperation between the sealing components and the sealing sections of the hydraulic pipe assembly achieves a seal between the brake pump body and the hydraulic pipe assembly, preventing hydraulic oil leakage and ensuring stable braking system pressure. The locking components and limiting sections provide a limiting and anti-detachment function between the brake pump body and the hydraulic pipe assembly, preventing loosening under vibration, high-pressure impact, and other conditions, ensuring system connection reliability. It is important to emphasize that this functional and structural partitioning eliminates mutual interference between the sealing and limiting / anti-detachment structures. Firstly, the dual physical structural protection (sealing and limiting) reduces the risk of braking system failure. Secondly, the independent partitioning of sealing and limiting functions facilitates standardized component design and maintenance / replacement. Thirdly, the partitioned design clearly defines assembly positioning points, reducing installation errors and improving compatibility with automated assembly.

[0015] Specifically, the oil pipe assembly includes an oil pipe body and an oil needle. The oil needle is connected to the pipe cavity, and one end of the oil needle enters the piston cavity through the second oil hole, while the other end of the oil needle is inserted into the oil pipe body.

[0016] In a preferred embodiment of the present invention, the sealing assembly includes a first sealing ring and a second sealing ring, with a portion of the limiting section distributed on the oil needle and another portion of the limiting section distributed on the oil pipe body.

[0017] The first sealing ring abuts between the outer wall of the oil needle and the inner wall of the connecting tube cavity;

[0018] The second sealing ring abuts between the outer wall of the oil pipe body and the inner wall of the connecting cavity.

[0019] The above-mentioned sealing structure scheme achieves multiple distributed sealing designs. First, it improves reliability, as the dual sealing ring design reduces the probability of leakage, and the distributed limiting avoids the failure of a single structure, making it suitable for vehicle environments with frequent vibrations. Second, it offers excellent assembly compatibility, as the limiting sections of the oil needle and oil pipe body can be assembled independently, reducing reliance on high-precision overall machining and improving production efficiency. Third, it provides convenient maintenance, as the sealing rings and limiting components can be replaced in sections, for example, only the worn first sealing ring needs to be replaced without disassembling the entire pipeline.

[0020] Optionally, the oil needle has a protruding section, the inner end of the oil tube body abuts against the protruding section, and the outer wall of the protruding section is flush with the outer wall of the oil tube body.

[0021] The first and second sealing rings are equal-diameter sealing rings, and the first and second sealing rings are distributed sequentially from the inside to the outside.

[0022] Optionally, the radial dimension of the first sealing ring is smaller than the radial dimension of the second sealing ring;

[0023] The inner end of the connecting tube cavity has a reduced diameter step, and the first sealing ring abuts between the outer wall of the oil needle and the inner wall of the reduced diameter step.

[0024] The second sealing ring is located behind the reduced diameter step, and the front end of the second sealing ring abuts against the outer end of the reduced diameter step.

[0025] In a preferred embodiment of this utility model, the locking assembly includes a clamping cap and a clamping ring;

[0026] The clamping ring extends at least partially between the outer wall of the tubing body and the inner wall of the tubing cavity;

[0027] The clamping cap is connected to the outer wall of the brake pump body to clamp the brake pump body, the clamping cap and the oil pipe body together.

[0028] By adopting the above-mentioned locking component structure, through the synergistic action of the clamping cap and the clamping ring, the locking component achieves a highly efficient limiting logic of "converting axial force into radial locking." Its advantages include at least the following: First, high assembly efficiency, strong compatibility between threaded connections and clamping ring structures, and rapid tightening via automated equipment without the need for complex positioning tools; second, high reliability, with a dual limiting mechanism (thread preload + clamping ring radial friction) to avoid single-structure failure (such as the possibility of loosening due to vibration in a simple threaded connection); third, excellent compatibility, as the clamping ring can adjust its opening size according to the outer diameter of the oil pipe to adapt to different specifications of pipelines, reducing the cost of component customization; and fourth, more convenient maintenance, as disassembly only requires loosening the clamping cap to separate the oil pipe, and the clamping ring can be reused.

[0029] Specifically, the clamping ring includes a clamping section and an operating section, wherein the radial dimension of the clamping section is smaller than the radial dimension of the operating section;

[0030] The clamping section extends through the nozzle opening between the outer wall of the limiting section and the inner wall of the nozzle cavity;

[0031] The operating section extends outside the pipe cavity, and the operating section forms a limiting fit with the pipe opening.

[0032] Furthermore, the clamping section is composed of multiple clamping arms, with expansion grooves formed between adjacent clamping arms, and the inner diameter of the clamping section gradually decreases from the outside to the inside.

[0033] On the other hand, a positioning slot is provided on the outer wall of the limiting section, and a positioning block is provided on the inner wall of the clamping section. The positioning block can be inserted into the positioning slot so that the clamping section is connected to the limiting section.

[0034] In this utility model, a self-sealing sheet is provided at the second oil hole. The self-sealing sheet has several expansion gaps and has a sealing form and a non-sealing form.

[0035] After the oil pipe assembly interacts with the self-sealing plate, it switches the self-sealing plate from a sealed state to a non-sealed state by expanding the gap.

[0036] The beneficial effects of this utility model are as follows:

[0037] 1. By cooperating with the sealing section of the sealing component and the oil pipe component, the brake pump body and the oil pipe component are sealed to prevent hydraulic oil leakage and ensure stable braking system pressure. 2. By using the locking component and the limiting section, the brake pump body and the oil pipe component are limited and prevented from coming loose under conditions such as vibration and high-pressure impact, thus ensuring the reliability of the system connection.

[0038] Second, the functional and structural zoning can eliminate the mutual interference between the sealing structure and the limiting and anti-detachment structure. First, the dual protection of the physical structure (sealing and limiting) reduces the risk of brake system failure. Second, the independent zoning of sealing and limiting functions facilitates the standardized design and maintenance and replacement of parts. Third, the zoning design clearly defines the assembly positioning points, reduces installation errors, and improves the compatibility of automated assembly. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of this utility model.

[0040] Figure 2 This is a cross-sectional view of the second scheme in Embodiment 2.

[0041] Figure 3 This is a split diagram of the tubing assembly in the second scheme of Embodiment 2.

[0042] Figure 4 This is an exploded view of the tubing assembly in the second embodiment of Example 2.

[0043] Figure 5 This is a cross-sectional view of the second scheme in Embodiment 1.

[0044] Figure 6 This is a disassembled diagram of the tubing assembly in the second scheme of Embodiment 1.

[0045] Figure 7 This is an exploded view of the tubing assembly in the second scheme of Embodiment 1.

[0046] Figure 8 This is a schematic diagram of the clamping ring structure.

[0047] In the diagram: 1. Brake pump body; 11. Piston chamber; 12. Oil reservoir; 13. Connector chamber; 131. Connector opening; 132. Reduction step; 14. First oil hole; 15. Second oil hole; 16. Self-sealing plate; 161. Expansion gap; 2. Piston push rod assembly; 3. Brake handle; 31. Pivot mechanism; 4. Oil pipe assembly; 41. Oil pipe body; 42. Oil needle; 421. Protruding section; 401. Sealing section; 402. Limiting section; 403. External section; 404. Positioning groove; 5. Sealing assembly; 51. First sealing ring; 52. Second sealing ring; 6. Positioning assembly; 61. Compression cap; 62. Clamping ring; 621. Clamping section; 6211. Clamping arm; 6212. Expansion groove; 6213. Positioning block; 622. Operating section. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Example 1

[0052] Reference Figures 1 to 8 A brake hose connector structure includes: a brake pump body 1, which has a piston chamber 11, an oil reservoir 12, and a connecting pipe chamber 13. The oil reservoir 12 is connected to the piston chamber 11 through a first oil hole 14, and the connecting pipe chamber 13 is connected to the piston chamber 11 through a second oil hole 15, and the connecting pipe chamber 13 has a connecting pipe opening 131; a piston push rod assembly 2, which is located in the piston chamber 11; a brake handle 3, which is rotatably engaged with the brake pump body 1 through a pivoting mechanism 31; and an hose assembly 4, which is detachably connected to the brake pump body 1 and is connected to the piston chamber 11 after passing through the connecting pipe chamber 13.

[0053] It is worth mentioning that the tubing assembly 4 includes at least a sealing section 401, a limiting section 402, and an outer section 403; wherein, the sealing section 401 is located in the tubing cavity 13, and the outer wall of the sealing section 401 forms a sealing fit with the inner wall of the tubing cavity 13 through the sealing assembly 5; the limiting section 402 is located in the tubing cavity 13, and the outer wall of the limiting section 402 forms a limiting and anti-detachment fit with the inner wall of the tubing cavity 13 through the locking assembly 6.

[0054] Compared to existing technologies, the above structural design primarily involves functional and spatial partitioning of the oil pipe assembly 4, with different sections performing different functions. Specifically, the sealing component 5, in conjunction with the sealing section 401 of the oil pipe assembly 4, achieves a sealing function between the brake pump body 1 and the oil pipe assembly 4, preventing hydraulic oil leakage and ensuring stable braking system pressure. The locking component 6, along with the limiting section 402, provides a limiting and anti-detachment function between the brake pump body 1 and the oil pipe assembly 4, preventing loosening under vibration, high-pressure impact, and other conditions, thus ensuring system connection reliability. It is important to emphasize that this functional and structural partitioning eliminates mutual interference between the sealing structure and the limiting and anti-detachment structure. Firstly, the dual physical structural protection (sealing and limiting) reduces the risk of braking system failure. Secondly, the independent partitioning of sealing and limiting functions facilitates standardized component design and maintenance / replacement. Thirdly, the partitioned design clearly defines assembly positioning points, reducing installation errors and improving compatibility with automated assembly.

[0055] Specifically, the oil pipe assembly 4 includes an oil pipe body 41 and an oil needle 42. The oil needle 42 is connected to the pipe cavity 13, and one end of the oil needle 42 enters the piston cavity 11 through the second oil hole 15. The other end of the oil needle 42 is inserted into the oil pipe body 41 to realize the oil circuit connection between the brake pump body 1 and the oil pipe assembly 4.

[0056] Reference Figure 2 , Figure 5 In this invention, a self-sealing plate 16 is provided at the second oil hole 15. The self-sealing plate 16 has several expansion slots 161 and can be in a sealing or non-sealing state. After the oil pipe assembly 4 interacts with the self-sealing plate 16, it switches the self-sealing plate 16 from the sealing state to the non-sealing state through the expansion slots 161. The self-sealing plate 16 structure with expansion slots 161 achieves an automatic sealing function without external force through an intelligent mechanism of "elastic deformation + geometric triggering".

[0057] Example 2

[0058] In a preferred embodiment of this utility model, the sealing component 5 includes a first sealing ring 51 and a second sealing ring 52. A portion of the limiting section 402 is distributed on the oil needle 42, and another portion of the limiting section 402 is distributed on the oil pipe body 41. The first sealing ring 51 abuts between the outer wall of the oil needle 42 and the inner wall of the connecting cavity 13; the second sealing ring 52 abuts between the outer wall of the oil pipe body 41 and the inner wall of the connecting cavity 13. This sealing structure achieves multiple distributed sealing designs: firstly, improved reliability, with the dual sealing ring design reducing the probability of leakage and distributed limiting to prevent single-structure failure, making it suitable for vehicle environments with frequent vibrations; secondly, excellent assembly compatibility, as the limiting sections 402 of the oil needle 42 and the oil pipe body 41 can be assembled independently, reducing reliance on high-precision overall machining and improving production efficiency; and thirdly, convenient maintenance, as the sealing rings and limiting components can be replaced in sections, for example, only the worn first sealing ring 51 needs to be replaced without disassembling the entire pipeline.

[0059] There are various structural options for the connection between the oil needle 42 and the oil pipe body 41. The available options (whichever is chosen based on requirements) are as follows:

[0060] I. Reference Figures 5-7 The oil needle 42 has a protruding section 421. As a key structure of the oil needle 42, the protruding section 421 primarily serves to provide a support point for the oil pipe body 41, ensuring axial positioning accuracy during oil pipe installation. When the inner end of the oil pipe body 41 abuts against the protruding section 421, it prevents excessive insertion or loosening of the oil pipe, ensuring the stability of the oil circuit connection. Furthermore, the inner end of the oil pipe body 41 abuts against the protruding section 421, and the outer wall of the protruding section 421 is flush with the outer wall of the oil pipe body 41; this avoids the formation of steps or protrusions on the outside after assembly, reducing fluid resistance and facilitating the wrapping or installation of external components, thus improving the overall compactness and aesthetics of the structure. Furthermore, the first sealing ring 51 and the second sealing ring 52 are equal-diameter sealing rings, which facilitates standardized production and replacement, and reduces the difficulty of component adaptation. The first sealing ring 51 and the second sealing ring 52 are distributed sequentially from the inside to the outside. The inner sealing ring contacts the fluid medium first and undertakes the main sealing function. The outer sealing ring serves as an auxiliary seal, which can prevent the intrusion of external dust, moisture and other impurities, and at the same time prevent leakage diffusion when the inner sealing ring fails, forming a double insurance mechanism. At the same time, it can optimize the pressure distribution. The parallel arrangement of equal-diameter sealing rings can make the pressure on the sealing surface evenly distributed, avoid local stress concentration caused by size differences, and extend the service life of the sealing rings.

[0061] II. Reference Figures 2-4The radial dimension of the first sealing ring 51 is smaller than that of the second sealing ring 52; the inner end of the pipe cavity 13 has a reduced diameter step 132, the first sealing ring 51 abuts between the outer wall of the oil needle 42 and the inner wall of the reduced diameter step 132; the second sealing ring 52 is located behind the reduced diameter step 132, and the front end of the second sealing ring 52 abuts against the outer end of the reduced diameter step 132.

[0062] The first sealing ring 51, with a smaller radial dimension, is installed between the oil needle 42 and the reduced-diameter step 132. It is suitable for precision sealing in confined spaces and primarily undertakes the task of media sealing. The second sealing ring 52, with a larger radial dimension, is arranged on the outside of the reduced-diameter step 132, utilizing a larger contact area to form a secondary seal and enhance leakage prevention. The advantages of the non-equal diameter design are: firstly, space optimization: the smaller diameter sealing ring adapts to the narrow area of ​​the reduced-diameter step 132, while the larger diameter sealing ring fills the outer space, avoiding assembly interference caused by the equal diameter design; secondly, pressure grading: the smaller diameter sealing ring contacts the high-pressure medium first, while the larger diameter sealing ring bears lower pressure, forming a graded pressure relief effect and reducing the load on a single sealing ring. On the other hand, regarding the assembly relationship between the sealing ring and the reduced diameter step 132, the first sealing ring 51 is installed between the outer wall of the oil needle 42 and the inner wall of the reduced diameter step 132. Its cross-section is compressed to fill the gap and form a static sealing surface. The second sealing ring 52 is installed with its front end abutting against the outer end of the reduced diameter step 132 and its rear end contacting the inner wall of the pipe cavity 13. The large diameter design generates a greater radial clamping force to prevent external impurities from entering.

[0063] Example 3

[0064] Reference Figures 2-8 In a preferred embodiment of this utility model, the locking assembly 6 includes a clamping cap 61 and a clamping ring 62; the clamping ring 62 extends at least partially between the outer wall of the oil pipe body 41 and the inner wall of the connecting pipe cavity 13; the clamping cap 61 is connected to the outer wall of the brake pump body 1 to press the brake pump body 1, the clamping cap 61, and the oil pipe body 41 together. It should be noted that the clamping cap 61 can be connected by threaded connection, screw-on connection, elastic snap-on connection, magnetic connection, tenon and mortise connection, etc., and is not specifically limited here.

[0065] By adopting the above-mentioned locking component 6 structure, through the synergistic action of the clamping cap 61 and the clamping ring 62, the locking component 6 achieves a highly efficient limiting logic of "converting axial force into radial locking". Its advantages include at least the following: First, high assembly efficiency, strong compatibility between the threaded connection and the clamping ring 62 structure, and quick tightening by automated equipment without the need for complex positioning tools; Second, high reliability, with a dual limiting mechanism (thread preload + radial friction of the clamping ring 62) to avoid single-structure failure (such as the possibility of loosening due to vibration in a simple threaded connection); Third, good compatibility, the clamping ring 62 can adjust the opening size according to the outer diameter of the oil pipe to adapt to different specifications of pipelines, reducing the cost of component customization; Fourth, more convenient maintenance, during disassembly, only the clamping cap 61 needs to be loosened to separate the oil pipe, and the clamping ring 62 can be reused.

[0066] Specifically, the clamping ring 62 includes a clamping section 621 and an operating section 622. The radial dimension of the clamping section 621 is smaller than the radial dimension of the operating section 622. The clamping section 621 extends through the pipe opening 131 between the outer wall of the limiting section 402 and the inner wall of the pipe cavity 13. The operating section 622 extends out of the pipe cavity 13, and the operating section 622 forms a limiting fit with the pipe opening 131.

[0067] The dual-section clamping ring 62 structure achieves a balance between ease of assembly and reliable connection through its small-diameter insertion and large-diameter limiting design. The dimensional difference between the clamping section 621 and the operating section 622 is significant. The clamping section 621 has a smaller radial dimension, facilitating its passage through the pipe opening 131 into the pipe cavity 13. Its cross-sectional shape is typically annular or has an elastic arm, generating radial clamping force in the gap between the limiting section 402 and the pipe cavity 13. The operating section 622 has a larger radial dimension, serving as a gripper for external operation. Its outer diameter is typically larger than the diameter of the pipe opening 131, forming a natural limiting structure.

[0068] Furthermore, referring to Figure 8 The clamping section 621 is composed of multiple clamping arms 6211, with expansion grooves 6212 formed between adjacent clamping arms 6211. When the clamping ring 62 is inserted into the limiting section 402, the expansion grooves 6212 allow the clamping arms 6211 to open outward, generating a radial restoring force. The expansion grooves 6212 serve two purposes: first, stress relief, preventing fatigue fracture of the clamping arms 6211 due to excessive deformation; and second, installation guidance, as the notches formed by the grooves serve as visual markers during assembly, ensuring that the clamping arms 6211 are evenly distributed on the outer periphery of the limiting section 402. More specifically, the inner diameter of the clamping section 621 gradually decreases from the outside to the inside, ensuring a progressive clamping force during insertion.

[0069] The assembly steps of the clamping ring 62 are as follows: 1. Pre-positioning: Align the clamping ring 62 axially with the pipe opening 131, so that the outer end of the clamping section 621 is inserted into the opening first; 2. Elastic deformation: Push the operating section 622, and when the clamping arm 6211 passes through the opening, the inner diameter shrinks to a size smaller than the opening diameter due to the elastic contraction of the expansion groove 6212; 3. Self-tightening: When the inner end (small inner diameter end) of the clamping arm 6211 completely passes through the opening, the conical surface forces the clamping arm 6211 to expand and clamp the limiting section 402.

[0070] A more preferred embodiment is as follows: a positioning groove 404 is also provided on the outer wall of the limiting section 402, and a positioning block 6213 protrudes inward on the inner wall of the clamping section 621. The positioning block 6213 can be inserted into the positioning groove 404, so that the clamping section 621 is connected to the limiting section 402. Through the cooperation of the positioning block 6213 and the positioning groove 404, the functional synergy design of the positioning structure is realized. First, axial positioning is formed: after the positioning block 6213 is inserted into the groove, it restricts the clamping section 621 from moving axially along the limiting section 402, supplementing the axial limiting function of the operating section 622; second, circumferential positioning is achieved. The cooperation between the groove and the positioning block 6213 prevents the clamping ring 62 from rotating relative to the limiting section 402, avoiding the expansion groove 6212 or the sealing ring from being biased due to circumferential misalignment.

[0071] 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.

[0072] 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 hose connector structure, comprising: The brake pump body (1) has a piston chamber (11), an oil reservoir (12) and a connecting pipe chamber (13). The oil reservoir (12) is connected to the piston chamber (11) through a first oil hole (14). The connecting pipe chamber (13) is connected to the piston chamber (11) through a second oil hole (15). The connecting pipe chamber (13) has a connecting pipe opening (131). Piston push rod assembly (2), which is located in the piston chamber (11); The brake handle (3) is rotated with the brake pump body (1) via a pivoting mechanism (31); The oil pipe assembly (4) is detachably connected to the brake pump body (1) and communicates with the piston chamber (11) after passing through the pipe chamber (13); Its features are: The tubing assembly (4) includes at least a sealing section (401), a limiting section (402), and an external section (403); The sealing section (401) is located in the pipe cavity (13), and the outer wall of the sealing section (401) forms a sealing fit with the inner wall of the pipe cavity (13) through the sealing assembly (5); The limiting section (402) is located in the connecting tube cavity (13), and the outer wall of the limiting section (402) forms a limiting and anti-detachment fit with the inner wall of the connecting tube cavity (13) through the locking assembly (6).

2. The brake oil pipe joint structure according to claim 1, characterized in that: The oil pipe assembly (4) includes an oil pipe body (41) and an oil needle (42). The oil needle (42) is connected to the pipe cavity (13), and one end of the oil needle (42) enters the piston cavity (11) through the second oil hole (15), while the other end of the oil needle (42) is inserted into the oil pipe body (41).

3. The brake oil pipe joint structure according to claim 2, characterized in that: The sealing assembly (5) includes a first sealing ring (51) and a second sealing ring (52), with a portion of the limiting section (402) distributed on the oil needle (42) and another portion of the limiting section (402) distributed on the oil pipe body (41). The first sealing ring (51) abuts against the outer wall of the oil needle (42) and the inner wall of the connecting tube cavity (13); The second sealing ring (52) abuts between the outer wall of the oil pipe body (41) and the inner wall of the connecting cavity (13).

4. The brake oil pipe joint structure according to claim 3, characterized in that: The oil needle (42) has a protruding section (421), the inner end of the oil pipe body (41) abuts against the protruding section (421), and the outer wall of the protruding section (421) is flush with the outer wall of the oil pipe body (41). The first sealing ring (51) and the second sealing ring (52) are equal diameter sealing rings, and the first sealing ring (51) and the second sealing ring (52) are distributed from the inside to the outside.

5. The brake oil pipe joint structure according to claim 3, characterized in that: The radial dimension of the first sealing ring (51) is smaller than the radial dimension of the second sealing ring (52); The inner end of the connecting tube cavity (13) has a reduced diameter step (132), and the first sealing ring (51) abuts between the outer wall of the oil needle (42) and the inner wall of the reduced diameter step (132). The second sealing ring (52) is located behind the reduced diameter step (132), and the front end of the second sealing ring (52) abuts against the outer end of the reduced diameter step (132).

6. The brake oil pipe joint structure according to claim 1, characterized in that: The locking assembly (6) includes a clamping cap (61) and a clamping ring (62); The clamping ring (62) extends at least partially between the outer wall of the tubing body (41) and the inner wall of the connecting cavity (13); The clamping cap (61) is connected to the outer wall of the brake pump body (1) to clamp the brake pump body (1), the clamping cap (61) and the oil pipe body (41) together.

7. The brake oil pipe joint structure according to claim 6, characterized in that: The clamping ring (62) includes a clamping section (621) and an operating section (622), wherein the radial dimension of the clamping section (621) is smaller than the radial dimension of the operating section (622); The clamping section (621) extends through the pipe opening (131) and is inserted between the outer wall of the limiting section (402) and the inner wall of the pipe cavity (13); The operating section (622) extends outside the pipe cavity (13), and the operating section (622) and the pipe opening (131) form a limiting fit.

8. The brake oil pipe joint structure according to claim 7, characterized in that: The clamping section (621) is composed of multiple clamping arms (6211), with expansion grooves (6212) formed between adjacent clamping arms (6211), and the inner diameter of the clamping section (621) gradually decreases from the outside to the inside.

9. The brake oil pipe joint structure according to claim 7, characterized in that: The outer wall of the limiting section (402) is also provided with a positioning slot (404), and the inner wall of the clamping section (621) is provided with a positioning block (6213) protruding inward. The positioning block (6213) can be inserted into the positioning slot (404) so ​​that the clamping section (621) is connected to the limiting section (402).

10. The brake oil pipe joint structure according to claim 1, characterized in that: The second oil hole (15) is provided with a self-sealing plate (16), the self-sealing plate (16) has a plurality of expansion gaps (161), and the self-sealing plate (16) has a sealing form and a non-sealing form. After the oil pipe assembly (4) interacts with the self-sealing plate (16), the self-sealing plate (16) switches from a sealed state to a non-sealed state through the expansion gap (161).

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