Automobile brake pipe

Abstract

The utility model relates to brake pipe protection sleeve technical field, concretely relates to a brake pipe protection sleeve convenient to disassemble and a car brake pipe convenient to maintain. Including pipe body, limiting mechanism, the disassembling mechanism and the protection sleeve of setting on the pipe body and the cleaning mechanism of setting on the protection sleeve, the cleaning mechanism and the protection sleeve sliding connection are used for removing the impurity dirtiness on the protection sleeve surface, limiting mechanism includes the connecting ring setting at the both ends of protection sleeve, and the protection sleeve is detachably fixed between the two snap rings of disassembling mechanism through the connecting ring, and the snap ring includes first snap ring and second snap ring, and first snap ring includes support and butt joint clamp, and second snap ring includes connecting block and card frame, and connecting block sets up on the support and is slidably matched with the support, and card frame is clamped with butt joint clamp, and is fixedly connected through fastener. The protection sleeve of this car brake pipe is convenient to disassemble, and fixed stable, and has the characteristics such as excellent adaptability and high maintenance convenience.

Description

Technical Field

[0001] This utility model relates to the technical field of brake pipe protective sleeves, specifically to a brake pipe protective sleeve that is easy to disassemble, and an automotive brake pipe that is easy to maintain. Background Technology

[0002] As a core component of the vehicle's braking system, the safety and durability of automotive brake lines directly affect driving safety. Therefore, to prevent damage to brake lines during use (such as from friction, impact, corrosion, etc.) and to extend their service life, protective sleeves are usually installed on their exterior. However, traditional automotive brake lines and protective sleeves typically use a one-piece design. With this design, the protective sleeve and protective sleeve must be pre-fitted and installed as a whole, and the dimensions and orientation of the brake line and protective sleeve must be strictly aligned during installation. This process is not only cumbersome but also requires extremely high assembly precision. More importantly, the one-piece structure binds the dimensions of the protective sleeve and brake line together, making it impossible to adjust the thickness and material of the protective sleeve according to the actual wear of the brake line or the operating environment, thus failing to meet the protection requirements under different operating conditions. Furthermore, if the protective sleeve or brake line is damaged or aged due to friction, impact, localized corrosion, or other reasons requiring repair, the entire one-piece structure must be removed and replaced. It is impossible to repair the protective sleeve or brake line separately, which undoubtedly makes the maintenance process more complex and time-consuming.

[0003] To avoid the inconveniences of a one-piece structure, designers attempted to use clamps or cable ties to tightly secure the protective sleeve to the brake pipe body. However, in practical applications, the results were still unsatisfactory, for the following reasons: The fastening method of clamps and cable ties relies on radial pressure for tightening. However, the continuous vibration generated during vehicle operation can easily cause clamps to loosen and cable ties to slacken, resulting in poor fixing stability and gaps between the protective sleeve and the brake pipe. This not only fails to effectively buffer external impacts but may even accelerate wear on the surface of the brake pipe due to relative friction at the gap. Moreover, the gaps formed between the clamps / cable ties and the protective sleeve / brake pipe easily accumulate dust, oil, and other impurities. Because of the obstruction of the fasteners, these impurities are difficult to clean, and long-term accumulation will accelerate the aging of the protective sleeve and the corrosion of the brake pipe, ultimately shortening the service life of both.

[0004] Therefore, how to solve the above problems has always been a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a protective sleeve for automotive brake pipes. This protective sleeve is characterized by convenient installation and removal, stable fixation, excellent adaptability, and high maintenance convenience, effectively meeting the high-performance requirements of automotive braking systems.

[0006] The objective of this utility model is achieved through the following solution: An automotive brake pipe includes a pipe body, a limiting mechanism, a disassembly mechanism sleeved on the pipe body and a protective sleeve, and a cleaning mechanism sleeved on the protective sleeve. The cleaning mechanism is slidably connected to the protective sleeve and is used to remove impurities and dirt from the surface of the protective sleeve. The limiting mechanism includes connecting rings at both ends of the protective sleeve. The protective sleeve is detachably fixed between two retaining rings of the disassembly mechanism via the connecting rings. The retaining rings include a first retaining ring and a second retaining ring. The first retaining ring includes a support column and a docking clamp. The second retaining ring includes a connecting block and a retaining bracket. The connecting block is sleeved on the support column and slides with the support column. The retaining bracket is engaged with the docking clamp and fixed by fasteners.

[0007] Preferably, the limiting mechanism further includes limiting components respectively disposed on the first retaining ring and the second retaining ring. The limiting components include a limiting ring, a fixing rod disposed at both ends of the limiting ring, and a plurality of sliders fixedly disposed on the limiting ring. A guide rod is disposed at each radial end of the first retaining ring and the second retaining ring. The slider is slidably engaged with the corresponding guide rod. The fixing rod has a threaded hole, and a screw passes through the threaded hole. The screw is rotated to make the end of the screw abut against the surface of the retaining ring, thereby limiting the sliding of the slider along the guide rod.

[0008] Preferably, the card holder includes a snap-fit ​​part and a first support plate, and the docking clamp includes a docking part and a second support plate. The snap-fit ​​part snaps into the docking part to achieve initial fixation of the first retaining ring and the second retaining ring. Both the first support plate and the second support plate are provided with through holes, and the fastener passes through the through holes to achieve fixation of the retaining ring.

[0009] Preferably, both the first and second retaining rings are provided with locking components. The locking components include a rotating ring, a support rod, and a top plate. One end of the rotating ring is rotatably fixed to the first or second support plate via a rotating block. The other end of the rotating ring is fixedly connected to a slider away from the first or second support plate. The support rod and the top plate are both located in the middle of the rotating ring so that rotating the support rod can cause the rotating ring to rotate around the rotating block, thereby causing the top plate to abut against the limiting ring to restrict the movement of the limiting ring.

[0010] Preferably, the outer periphery of the connecting ring is provided with multiple locking rods at intervals, and the two locking rings are provided with multiple locking slots respectively. The free ends of the locking rods are respectively inserted into the corresponding locking slots, so that the protective sleeve can be detachably fixed between the two locking rings by the locking engagement of the locking rods and the locking slots.

[0011] Preferably, the cleaning mechanism includes two sliding rings, which are sleeved on the outside of the protective sleeve and can slide along the axial direction of the protective sleeve. The inner wall of the sliding ring is provided with a plurality of protrusions spaced apart circumferentially, and the outer side of the protective sleeve is provided with a plurality of sliding grooves corresponding to it along its axial direction. The outer circumferential dimensions of the protrusions are adapted to the inner circumferential dimensions of the sliding grooves.

[0012] Preferably, the outer side wall of the sliding ring is provided with a retaining plate, and the support rod of the locking assembly is provided with a groove. The retaining plate can engage with the groove to limit the sliding of the sliding ring along the axial direction of the protective sleeve.

[0013] Preferably, a conical block is fixedly connected to both ends of the connecting block, and the conical block is sleeved on the support column and slides in cooperation with the support column.

[0014] Preferably, the protective sleeve is made of rubber or silicone.

[0015] The beneficial effects of this utility model are as follows: An automotive brake pipe includes a pipe body, a limiting mechanism, a disassembly mechanism sleeved on the pipe body and a protective sleeve, and a cleaning mechanism sleeved on the protective sleeve. The cleaning mechanism is slidably connected to the protective sleeve and is used to remove impurities and dirt from the surface of the protective sleeve. The limiting mechanism includes connecting rings at both ends of the protective sleeve. The protective sleeve is detachably fixed between two retaining rings of the disassembly mechanism via the connecting rings. The retaining rings include a first retaining ring and a second retaining ring. The first retaining ring includes a support column and a docking clamp. The second retaining ring includes a connecting block and a retaining bracket. The connecting block is sleeved on the support column and slides with the support column. The retaining bracket is engaged with the docking clamp and fixed by fasteners.

[0016] The automotive brake pipe of this utility model, on the one hand, achieves a staggered engagement function between the first and second retaining rings by utilizing the sliding fit between the support of the first retaining ring and the connecting block of the second retaining ring, combined with the snap-fit ​​structure of the retaining bracket and the fixing effect of the fasteners, ensuring the overall stable fixation of the retaining rings. On the other hand, the protective sleeve forms a detachable connection structure with the retaining rings through the connecting ring. This design not only makes the installation of the protective sleeve more convenient, but more importantly, when it is necessary to replace the protective sleeve or repair the pipe body, it is not necessary to disassemble the entire structure, which greatly reduces the difficulty of maintenance operations and effectively saves maintenance costs. In addition, a cleaning mechanism is slidably connected to the surface of the protective sleeve. This mechanism can efficiently remove impurities attached to the surface of the protective sleeve during the use of the device, so that the protective sleeve can always maintain good protective performance and usability.

[0017] Preferably, the limiting mechanism further includes limiting components respectively disposed on the first retaining ring and the second retaining ring. The limiting components include a limiting ring, a fixing rod disposed at both ends of the limiting ring, and a plurality of sliders fixedly disposed on the limiting ring. A guide rod is disposed at each radial end of the first retaining ring and the second retaining ring. The slider is slidably engaged with the corresponding guide rod. The fixing rod has a threaded hole, and a screw passes through the threaded hole. The screw is rotated to make the end of the screw abut against the surface of the retaining ring, thereby limiting the sliding of the slider along the guide rod.

[0018] Preferably, the clip includes a snap-fit ​​portion and a first support plate, and the docking clamp includes a docking portion and a second support plate. The snap-fit ​​portion snaps into the docking portion to achieve initial fixation of the first and second retaining rings. Both the first and second support plates have through holes, and the fasteners pass through these through holes to facilitate a fixed connection between the clip and the docking clamp, thereby achieving complete fixation between the first and second retaining rings, as well as between the retaining rings and the pipe body. In other words, this invention achieves initial fixation through snap-fit ​​and secondary reinforcement through fasteners, effectively preventing fixation failure caused by fastener loosening due to vibration during vehicle operation.

[0019] Preferably, both the first and second retaining rings are provided with locking components. The locking components include a rotating ring, a support rod, and a top plate. One end of the rotating ring is rotatably fixed to the first or second support plate via a rotating block. The other end of the rotating ring is fixedly connected to a slider away from the first or second support plate. The support rod and the top plate are both located in the middle of the rotating ring so that rotating the support rod can cause the rotating ring to rotate around the rotating block, thereby causing the top plate to abut against the limiting ring, thus restricting the movement of the limiting ring.

[0020] Preferably, the outer periphery of the connecting ring is provided with multiple locking rods at intervals, and the two locking rings are provided with multiple locking slots respectively. The free ends of the locking rods are respectively inserted into the corresponding locking slots, so that the protective sleeve can be detachably fixed between the two locking rings by the locking engagement of the locking rods and the locking slots.

[0021] Preferably, the cleaning mechanism includes two sliding rings, which are sleeved on the outside of the protective sleeve and can slide along the axial direction of the protective sleeve. The inner wall of the sliding ring is provided with a plurality of protrusions spaced apart circumferentially, and the outer side of the protective sleeve is provided with a plurality of sliding grooves corresponding to it along its axial direction. The outer circumferential dimensions of the protrusions are adapted to the inner circumferential dimensions of the sliding grooves.

[0022] The sliding ring of this invention is sleeved on the outside of the protective sleeve and can slide axially. The circumferentially spaced protrusions on its inner wall are adapted to the axial sliding groove on the outer side of the protective sleeve. As the sliding ring slides, the protrusions adhere to the surface of the protective sleeve and the inner wall of the sliding groove to scrape away dust, mud, and other impurities, thereby achieving thorough cleaning of the protective sleeve and ensuring its protective performance. Simultaneously, the adapted design of the protrusions and sliding groove provides stable guidance for the sliding ring, preventing slippage, and also reduces the weight of the protective sleeve without affecting its overall structural strength.

[0023] Preferably, the outer side wall of the sliding ring is provided with a retaining plate, and the support rod of the locking assembly is provided with a groove. The retaining plate can engage with the groove to limit the sliding of the sliding ring along the axial direction of the protective sleeve.

[0024] Preferably, a cone block is fixedly connected to both ends of the connecting block, and the cone block is sleeved on the support column and slides in cooperation with the support column, so that when the cone block slides on the support column, it can scrape off dust, mud and other impurities attached to the outside of the support column, keep the support column clean and ensure that the connecting block slides smoothly.

[0025] The advantages of this utility model are: (1) This utility model uses the sliding of the connecting block outside the support column to cause the two retaining rings to misalign. By rotating the first or second retaining ring, the retaining part of the clamp can be smoothly engaged with the outside of the mating clamp. After resetting, the retaining rings are stably fixed by bolt fasteners. This design makes the installation process of the brake pipe protective sleeve convenient and efficient. In other words, compared with the traditional structure, this utility model greatly simplifies the replacement process of the protective sleeve and the maintenance operation of the pipe body, effectively improving the maintainability and reliability of the brake pipe, while reducing the cost and time required for maintenance.

[0026] (2) The protrusion of this utility model is slidably connected to the outer surface of the protective sleeve, which can effectively scrape off dust, mud and other impurities from the surface of the protective sleeve; and the sliding groove provided on the outer side of the protective sleeve not only provides space for the protrusion to slide, but also helps to reduce the overall weight of the protective sleeve. The cleaning mechanism of this utility model can continuously clean the protective sleeve, ensuring its performance and lifespan. At the same time, when not in use, the support rod can limit the position of the locking plate, thereby fixing the sliding ring and preventing unexpected movement when not in use.

[0027] (3) This utility model enhances the stable connection with the protective sleeve by limiting the locking ring. Simultaneously, the locking ring employs a two-material compatibility scheme, effectively improving its versatility and flexibility, allowing it to adapt to the connection requirements of different materials. This helps extend the service life of the brake pipe, reduce maintenance costs, and ultimately improve vehicle driving safety. Furthermore, the compression action of the support rod on the limiting ring enables its rapid movement, facilitating the locking operation of the locking ring. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the retaining ring in this utility model; Figure 4 This is a schematic diagram of the structure of the second retaining ring in this utility model; Figure 5 This is a schematic diagram of the structure of the first retaining ring in this utility model; Figure 6 This is a schematic diagram of the connecting block and the cone block of this utility model; Figure 7 This is a schematic diagram of the structure of the protective sleeve in this utility model; Figure 8 This is a schematic diagram of the sliding ring in this utility model.

[0029] The components are as follows: 1. Pipe body; 2. Disassembly mechanism; 21. Snap ring; 22. Snap bracket; 23. Support column; 24. Connecting block; 25. Docking clamp; 26. Conical block; 27. Fixing assembly; 271. First support plate; 272. Fastener; 273. Nut; 274. Second support plate; 28. Locking assembly; 281. Rotating block; 282. Rotating ring; 283. Support rod; 284. Top plate; 3. Guide rod; 4. Limiting mechanism; 41. Slider; 42. Connecting rod; 43. Screw; 44. Limiting ring; 45. Connecting ring; 46. Snap rod; 47. Snap groove; 5. Protective sleeve; 6. Cleaning mechanism; 61. Sliding ring; 62. Protrusion; 63. Sliding groove; 64. Snap plate. Detailed Implementation

[0030] like Figures 1 to 8 As shown, an automotive brake pipe includes a pipe body 1, a disassembly mechanism 2 and a protective sleeve 5 fitted on the pipe body 1, a cleaning mechanism 6 fitted on the protective sleeve 5, and a limiting mechanism 4. The cleaning mechanism 6 is slidably connected to the protective sleeve 5 and is used to remove impurities and dirt from the surface of the protective sleeve 5. The protective sleeve 5 is made of an elastic material, and different materials of protective sleeves, such as rubber or silicone, can be selected according to actual protection needs.

[0031] The limiting mechanism 4 includes connecting rings 45 at both ends of the protective sleeve 5. The protective sleeve 5 is detachably fixed between two retaining rings 21 of the disassembly mechanism 2 via the connecting rings 45. The retaining rings 21 include a first retaining ring and a second retaining ring. The first retaining ring includes a support column 23 and a docking clamp 25. The second retaining ring includes a connecting block 24 and a retainer 22. The connecting block 24 is sleeved on the support column 23 and slides in cooperation with the support column 23. The retainer 22 is engaged with the docking clamp 25 and fixedly connected by fasteners 272. A conical block 26 is fixedly provided at both ends of the connecting block 24, and the conical block 26 is sleeved on the support column 23 and slides in cooperation with the support column 23 to facilitate the removal of stains from the support column 23. Specifically, the aforementioned card holder 22 includes a snap-fit ​​portion and a first support plate 271, and the docking clamp 25 includes a docking portion and a second support plate 274. The inner circumferential dimension of the snap-fit ​​portion is adapted to the outer circumferential dimension of the docking portion, so that the snap-fit ​​portion of the card holder 22 can slide and snap onto the outside of the docking clamp 25, thereby achieving the initial fixation of the first retaining ring and the second retaining ring. Both the first support plate 271 and the second support plate 274 are provided with through holes, and a fastener 272 (e.g., a connecting bolt) passes through the through hole and cooperates with the nut 273 to achieve the fixed connection between the card holder 22 and the docking clamp 25, thereby achieving the fixation between the first retaining ring and the second retaining ring, and simultaneously achieving the fixation between the retaining ring 21 and the tube body 1.

[0032] Multiple locking rods 46 are spaced apart on the outer periphery of the connecting ring 45, and multiple locking grooves 47 are correspondingly provided on the first and second locking rings of the two retaining rings. During installation and fixing, the free ends of the locking rods 46 can be inserted into the corresponding locking grooves 47, so that the protective sleeve 5 can be detachably fixed between the two retaining rings through the locking engagement of the locking rods 46 and the locking grooves 47. In this embodiment, the material of the locking rods 46 can be a hard material or a soft material.

[0033] The limiting mechanism 4 also includes limiting components respectively provided on the first retaining ring and the second retaining ring. The limiting components include a limiting ring 44, a fixing rod 42 provided at both ends of the limiting ring 44, and a plurality of sliders 41 fixedly provided on the limiting ring 44. The radial ends of the first retaining ring and the second retaining ring are respectively provided with a guide rod 3. The slider 41 slides with the corresponding guide rod 3. The guide rod 3 can provide good guidance for the slider 41. A threaded hole is provided on the fixing rod 42, and a screw 43 (i.e., a fixing bolt) passes through the threaded hole so that the user can rotate the screw 43 to make the end of the screw 43 abut against the surface of the retaining ring, thereby limiting the sliding of the slider 41 along the guide rod 3.

[0034] Locking components 28 are provided on both the first and second retaining rings. Each locking component 28 includes a rotating ring 282, a support rod 283, and a top plate 284. One end of the rotating ring 282 on the first retaining ring is rotatably fixed to the second support plate 274 via a rotating block 281, and the other end of the rotating ring 282 is fixedly connected to a slider 41 located away from the second support plate 274. Similarly, one end of the rotating ring 282 on the second retaining ring is rotatably fixed to the first support plate 271 via a rotating block 281, and the other end of the rotating ring 282 is fixedly connected to a slider 41 located away from the first support plate 271. The support rod 283 and the top plate 284 are both located at the middle of the rotating ring 282. Specifically, the end face of the top plate 284 is arc-shaped. By rotating the support rod 283, the rotating ring 282 can rotate around the rotating block 281, thereby causing the top plate 284 to abut against the limiting ring 44, thus restricting the movement of the limiting ring 44.

[0035] The cleaning mechanism 6 includes two sliding rings 61, which are fitted onto the outside of the protective sleeve 5 and can slide along the axial direction of the protective sleeve 5. Multiple protrusions 62 are spaced circumferentially on the inner wall of the sliding rings 61, and multiple sliding grooves 63 are correspondingly provided along the axial direction on the outer side of the protective sleeve 5. The outer circumferential dimensions of the protrusions 62 are adapted to the inner circumferential dimensions of the sliding grooves 63, so that the protrusions 62 can slide within the sliding grooves 63 without circumferential rotation. A retaining plate 64 is provided on the outer wall of the sliding rings 61, and a groove is provided on the support rod 283 of the locking assembly 28. The retaining plate 64 can engage with the groove to limit the sliding of the sliding rings 61 along the axial direction of the protective sleeve 5.

[0036] It is worth noting that the groove 47 of the aforementioned retaining ring has a certain length of space along the axial direction of the retaining ring, which can ensure that the retaining rod 46 can move smoothly within the groove 47 during the process of the retaining ring 21 switching between misaligned and reset states, thereby ensuring the feasibility of the retaining ring structure.

[0037] The working principle of this utility model is as follows: 1) When the material of the locking rod 46 is a hard material, first slide the slider 41 along the guide rod 3 so that the limiting rings 44 all move to the side of the locking ring close to the locking groove 47. Open the locking ring 21 so that the first locking ring and the second locking ring are misaligned (at this time, the locking part of the locking bracket 22 is disengaged from the outside of the docking part of the docking clamp 25). Place the locking rods 46 on the connecting ring 45 into the corresponding locking grooves 47 of the locking ring. At this time, reset the first locking ring and the second locking ring, that is, the inner circumference of the locking part and the outer circumference of the docking part form a locking fixation. At this time, the protective sleeve 5 is movably fixed on the locking ring.

[0038] Rotating the support rod 283 causes the rotating block 281 to drive the rotating ring 282 to rotate. The arc surface (i.e., end face) of the top plate 284 presses against the limiting ring 44, causing it to move. This allows the limiting ring 44 to press against the locking rod 46 on the side away from the sliding ring 61, further enhancing the limiting effect on the locking rod 46 and preventing the locking rod 46 from dislodging from the locking groove 47 due to vibration during vehicle operation. At the same time, before the fixing bolt 43 is tightened, the position of the limiting ring 44 can be temporarily locked by the continuous pressing of the top plate 284 to ensure its stable limiting of the locking rod 46. After adjustment, the fixing bolt 43 is tightened to complete the final fixation, improving the convenience of operation and the firmness of the connection.

[0039] 2) When the material of the clamping rod 7 is a soft material, first place the clamping rod 46 inside the clamping groove 47 and fix the clamping ring 21. Then, rotate the rotating ring 282 by rotating the support rod 283. Use the top plate 284 to squeeze the limiting ring 44 to move it. Then, the limiting ring 44 squeezes the clamping rod 46, causing the clamping rod 46 to deform and bend more than 90 degrees and fit against the surface of the clamping ring 21, thereby enhancing the stability of the connection and limiting the clamping rod 46. Then, use the fixing bolt to fix the position of the limiting ring 44 to maintain its clamping ability and complete the fixing.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A type of automotive brake pipe, characterized in that... It includes a tube body (1), a limiting mechanism (4), a disassembly mechanism (2) sleeved on the tube body (1) and a protective sleeve (5), and a cleaning mechanism (6) sleeved on the protective sleeve (5). The cleaning mechanism (6) is slidably connected to the protective sleeve (5) and is used to remove impurities and dirt from the surface of the protective sleeve (5). The limiting mechanism (4) includes connecting rings (45) at both ends of the protective sleeve (5). The protective sleeve (5) is detachably fixed between two retaining rings (21) of the disassembly mechanism (2) through the connecting rings (45). The retaining rings (21) include a first retaining ring and a second retaining ring. The first retaining ring includes a support column (23) and a docking clamp (25). The second retaining ring includes a connecting block (24) and a card holder (22). The connecting block (24) is sleeved on the support column (23) and slides with the support column (23). The card holder (22) is engaged with the docking clamp (25) and fixed by fasteners (272).

2. The automotive brake pipe according to claim 1, characterized in that, The limiting mechanism (4) further includes limiting components respectively provided on the first retaining ring and the second retaining ring. The limiting components include a limiting ring (44), a fixing rod (42) provided at both ends of the limiting ring (44), and a plurality of sliders (41) fixedly provided on the limiting ring (44). A guide rod (3) is provided at both radial ends of the first retaining ring and the second retaining ring. The slider (41) slides with the corresponding guide rod (3). The fixing rod (42) has a threaded hole, and a screw (43) passes through the threaded hole. The screw (43) is rotated to make the end of the screw (43) abut against the surface of the retaining ring, so as to limit the sliding of the slider (41) along the guide rod (3).

3. The automotive brake pipe according to claim 1, characterized in that, The card holder (22) includes a snap-fit ​​part and a first support plate (271). The docking clamp (25) includes a docking part and a second support plate (274). The snap-fit ​​part snaps into the docking part to achieve the initial fixation of the first retaining ring and the second retaining ring. The first support plate (271) and the second support plate (274) are both provided with through holes. The fastener (272) passes through the through holes to achieve the fixation of the retaining ring.

4. A vehicle brake pipe according to claim 2 or 3, characterized in that, Both the first and second retaining rings are provided with locking components (28). The locking components (28) include a rotating ring (282), a support rod (283), and a top plate (284). One end of the rotating ring (282) is rotatably fixed on the first support plate (271) or the second support plate (274) by a rotating block (281). The other end of the rotating ring (282) is fixedly connected to a slider (41) away from the first support plate (271) or the second support plate (274). The support rod (283) and the top plate (284) are both located in the middle of the rotating ring (282) so that the rotating rod (283) can be rotated to make the rotating ring (282) rotate around the rotating block (281), thereby making the top plate (284) abut against the limiting ring (44) to restrict the movement of the limiting ring (44).

5. The automotive brake pipe according to claim 1, characterized in that, The outer periphery of the connecting ring (45) is provided with multiple locking rods (46), and the two locking rings (21) are provided with multiple locking slots (47). The free end of the locking rod (46) is inserted into the corresponding locking slot (47) so that the protective sleeve (5) can be detachably fixed between the two locking rings (21) by the locking engagement of the locking rod (46) and the locking slot (47).

6. The automotive brake pipe according to claim 4, characterized in that, The cleaning mechanism (6) includes two sliding rings (61). The sliding rings (61) are sleeved on the outside of the protective sleeve (5) and can slide along the axial direction of the protective sleeve (5). The inner wall of the sliding rings (61) is provided with a plurality of protrusions (62) at intervals along the circumference. The outer side of the protective sleeve (5) is provided with a plurality of sliding grooves (63) along its axial direction. The outer circumferential dimensions of the protrusions (62) are adapted to the inner circumferential dimensions of the sliding grooves (63).

7. A car brake pipe according to claim 6, characterized in that, The outer wall of the sliding ring (61) is provided with a retaining plate (64), and the support rod (283) of the locking assembly (28) is provided with a groove. The retaining plate (64) can engage with the groove to limit the sliding of the sliding ring (61) along the axial direction of the protective sleeve (5).

8. The automotive brake pipe according to claim 1, characterized in that, Both ends of the connecting block (24) are fixedly connected to a cone block (26), and the cone block (26) is sleeved on the support column (23) and slides in cooperation with the support column (23).

9. A vehicle brake pipe according to claim 1, characterized in that, The protective sleeve (5) is made of rubber or silicone.

Images