Multi-layer composite structure of automobile brake pipe

Abstract

The utility model discloses a multi-layer composite structure of an automobile brake pipe, and belongs to the technical field of automobile brake pipes. Comprising a brake pipe body, the brake pipe body is formed by sequentially compositing an inner rubber layer, an inner woven layer, a middle rubber layer, an outer woven layer and an outer rubber layer from inside to outside, the two ends of the brake pipe body are connected with a second connector and a first connector respectively, and a hollow cavity is formed in the center of the brake pipe body and used for conveying brake fluid in a flowing mode. The outer side of the brake pipe body is connected with a threaded spring piece in a sleeving mode, and limiting assemblies are fixedly clamped to the outer sides of the two ends of the brake pipe body to limit the two ends of the threaded spring piece, the brake pipe body is arranged, the outer rubber layer makes direct contact with brake fluid, and the polar solvent resistance characteristic of the outer rubber layer can prevent the fluid from permeating and corroding the pipe wall; meanwhile, a smooth inner wall is provided to reduce fluid resistance, the middle rubber layer is arranged between the inner braided layer and the outer braided layer to buffer internal pressure fluctuation, structural damage caused by direct friction of braided wires is avoided, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of automotive brake pipe technology, and more specifically, to a multi-layer composite structure for automotive brake pipes. Background Technology

[0002] Brake lines are a key component of the braking system, and their main functions include: transmitting brake fluid: transmitting the hydraulic pressure generated by the master cylinder to the brake calipers (or brake pads), which in turn drive the brake pads / brake shoes to achieve braking.

[0003] In related technologies, in order to solve the problems of high price and long delivery cycle of imported yarn, the existing patent with publication number CN217815450U provides a double-layer polyester fiber braided brake tube, which relates to the field of brake tube technology. It is a composite multi-layer structure, including an inner adhesive layer, a double fiber layer and an outer adhesive layer. The double fiber layer includes an inner fiber layer and an outer fiber layer. In addition, CR adhesive is used as an adhesive layer, which can effectively fix the inner and outer reinforcing yarn layers, maintaining consistency and stability.

[0004] Although the existing technical solutions mentioned above have the advantage of low expansion and good stability by setting a middle rubber layer between the two fiber layers and using polyester fiber yarn to weave the double fiber layers, the brake pipe will generate impact and vibration during the braking process. It lacks effective buffering and protection, and the brake pipe is prone to greater friction and damage.

[0005] In view of this, we propose a multi-layer composite structure for automotive brake pipes. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] The purpose of this application is to provide a multi-layer composite structure for automotive brake pipes, which solves the technical problems of existing brake pipes generating impact and vibration during braking, and causing significant friction and damage to the brake pipes, thereby achieving the technical effects of shock absorption and wear resistance for brake pipes.

[0008] 2. Technical Solution

[0009] This application provides a multi-layer composite structure for automotive brake pipes, including a brake pipe body, wherein the brake pipe body is composed of an inner rubber layer, an inner braided layer, a middle rubber layer, an outer braided layer, and an outer rubber layer sequentially from the inside to the outside.

[0010] The brake pipe body has a connector 2 and a connector 1 connected to both ends. The brake pipe body has a hollow cavity in the center for brake fluid flow and delivery. A threaded spring is sleeved on the outside of the brake pipe body, and a limit assembly is fixedly engaged at both ends of the brake pipe body to limit the ends of the threaded spring.

[0011] Preferably, the outer adhesive layer is disposed on the outermost layer of the brake fluid and is made of EPDM material, and the thickness of the inner adhesive layer is 0.7-0.9mm.

[0012] Preferably, the outer braided layer is made of 1050DPET impregnated yarn to enhance the strength of the brake tube, and the braiding angle α is 58-60°. The inner braided layer is made of PVA impregnated yarn, and the braiding angle β is 55-57°.

[0013] Preferably, the inner braided layer and the outer braided layer are provided with a middle rubber layer for cushioning. The middle rubber layer is made of SBR material to reduce the displacement of the braided layers and frictional heat generation. The thickness is 0.3-0.4mm.

[0014] Preferably, the inner adhesive layer is made of EPDM material and the thickness of the adhesive layer is 1.0±0.1mm.

[0015] Preferably, the limiting component includes a clamp, and the two ends of the C-shaped opening of the clamp are connected to a first recess and a second recess.

[0016] Preferably, a tightening rod is rotatably provided on one side of the second recess, and a slot is provided inside the first recess. A hexagonal nut is threaded onto the outer side of the tightening rod through the slot.

[0017] 3. Beneficial effects

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] (1) This application has a brake pipe body, and the outer rubber layer is in direct contact with the brake fluid. Its polar solvent resistance can prevent the liquid from penetrating and corroding the pipe wall. At the same time, the smooth inner wall reduces fluid resistance. The middle rubber layer is between the inner braided layer and the outer braided layer, which buffers the internal pressure fluctuations, avoids the braided threads from directly rubbing against each other and causing structural damage, and extends the service life.

[0020] (2) This application provides threaded spring components and limiting components. The threaded spring components can reduce the damage to the brake pipe, improve the stability and reliability of the braking system, and also help reduce noise. The threaded spring components can protect the brake oil pipe from external factors, prevent the oil pipe surface from being worn or even cracked, and extend the service life of the brake oil pipe. The threaded spring components can fix the brake oil pipe in a proper position to prevent the oil pipe from shaking or shifting during vehicle operation. By setting hexagonal nuts in conjunction with tightening rods to rotate and tighten clamps on both sides of the brake pipe body, the protection and movement position of the threaded spring components can be limited. After the threaded spring components become weak, they are easy to replace. Attached Figure Description

[0021] Figure 1This is a first three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0023] Figure 3 This is a three-dimensional cross-sectional view of the brake pipe of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the limiting component of this utility model;

[0025] The following are the labels in the diagram: 110, Brake pipe body; 111, Inner rubber layer; 112, Inner braided layer; 113, Middle rubber layer; 114, Outer braided layer; 115, Outer rubber layer; 120, Threaded spring component; 130, Connector 1; 131, Connector 2; 200, Limiting component; 210, Second recessed block; 211, Hexagonal nut; 212, First recessed block; 213, Tightening rod; 214, Clamp. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] Please see Figure 1-4 The present invention provides an embodiment of a multi-layer composite structure for automotive brake pipes, comprising a brake pipe body 110, wherein the brake pipe body 110 is composed of an inner rubber layer 111, an inner braided layer 112, a middle rubber layer 113, an outer braided layer 114, and an outer rubber layer 115 sequentially from the inside to the outside. The brake pipe body 110 is connected to a second connector 131 and a first connector 130 at both ends, and a hollow cavity is provided in the center of the brake pipe body 110 for the flow and delivery of brake fluid.

[0029] Furthermore, the outer rubber layer 115 is located on the outermost layer of the brake fluid and is made of EPDM material, while the inner rubber layer 111 has a thickness of 0.7-0.9 mm. EPDM material is an oil-resistant and corrosion-resistant synthetic rubber used to transport brake fluid, and it is very stable.

[0030] Furthermore, the outer braided layer 114 is made of 1050DPET impregnated yarn to enhance the strength of the brake hose, with a braiding angle α of 58-60°. The inner braided layer 112 is made of PVA impregnated yarn, with a braiding angle β of 55-57°. The outer braided layer 114 increases the hose's strength and pressure resistance, while the inner braided layer 112 further enhances the hose's pressure and tensile strength.

[0031] Furthermore, a middle rubber layer 113 is provided inside the inner braided layer 112 and the outer braided layer 114 for cushioning. The middle rubber layer 113 is made of SBR material to reduce the displacement of the braided layers and frictional heat generation, and its thickness is 0.3-0.4mm. The middle rubber layer 113 serves to cushion and further protect the outer braided layer 114 and the inner braided layer 112.

[0032] Furthermore, the inner adhesive layer 111 is made of EPDM material with a thickness of 1.0±0.1mm. The inner adhesive layer 111 protects the internal structure from external environmental influences.

[0033] By setting the outer rubber layer 115 to directly contact the brake fluid, its polar solvent resistance can prevent liquid penetration and corrosion of the pipe wall, while providing a smooth inner wall to reduce fluid resistance. The middle rubber layer 113 is between the inner braided layer 112 and the outer braided layer 114, buffering internal pressure fluctuations, avoiding structural damage caused by direct friction between the braided threads, and extending service life. The double braided layers adopt a cross angle design with the first layer having a braiding angle of 58-60° and the second layer 55-57°, forming a three-dimensional mesh support structure, which can disperse the radial pressure during braking, such as the impact of high-pressure brake fluid, and the axial tensile force, such as the vibration and pulling during vehicle operation, preventing the pipe from expanding, twisting, or bursting. The high-strength fiber material, such as 1050D impregnated yarn, gives the brake pipe burst pressure resistance, which can typically reach 15-20MPa or more, meeting the high-pressure environment requirements of automotive braking systems.

[0034] A threaded spring 120 is sleeved on the outside of the brake pipe body 110, and the two ends of the brake pipe body 110 are fixedly engaged with a limiting component 200 to restrict the two ends of the threaded spring 120. The limiting component 200 includes a clamp 214, and the two ends of the C-shaped opening of the clamp 214 are connected to a first recess 212 and a second recess 210. A tensioning rod 213 is rotatably installed on one side inside the second recess 210. A groove is opened inside the first recess 212, and a hexagonal nut 211 is installed on the outer thread of the tensioning rod 213 through the groove. During braking, impacts and vibrations are generated. The threaded spring 120 can absorb these energies, reduce damage to the brake pipe, improve the stability and reliability of the braking system, and also help reduce noise. The threaded spring 120 can protect the brake pipe from external factors such as wear, compression, and collision. It can prevent the brake pipe from rubbing against other parts during vehicle operation, avoid wear or even cracking of the brake pipe surface, and extend the service life of the brake pipe. The threaded spring 120 secures the brake line in place, preventing it from shifting or moving during vehicle operation. This helps maintain the brake line's proper function, ensuring normal brake fluid delivery and stable braking system performance. The hexagonal nut 211, in conjunction with the tightening rod 213, rotates to tighten the clamp 214, securing it to both sides of the brake line body 110. This restricts the threaded spring 120's movement and protection. If the threaded spring 120 weakens, the hexagonal nut 211 can be rotated to remove it, the tightening rod 213 can be rotated to one side, and the clamp 214 can be completely removed from the threaded spring 120. The threaded spring 120 can be slidably replaced from one side.

[0035] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-layer composite structure for automotive brake pipes, characterized in that, include: The brake pipe body (110) is composed of an inner rubber layer (111), an inner braided layer (112), a middle rubber layer (113), an outer braided layer (114), and an outer rubber layer (115) arranged sequentially from the inside to the outside. The brake pipe body (110) is connected to two connectors, one (131) and the other (130), respectively. The brake pipe body (110) has a hollow cavity in the center for the flow and delivery of brake fluid. A threaded spring (120) is sleeved on the outside of the brake pipe body (110), and the two ends of the brake pipe body (110) are fixedly engaged with a limit assembly (200) to limit the two ends of the threaded spring (120).

2. The multi-layer composite structure of the automotive brake pipe according to claim 1, characterized in that: The outer adhesive layer (115) is located on the outermost layer of the brake fluid and is made of EPDM material. The thickness of the inner adhesive layer (111) is 0.7-0.9 mm.

3. The multi-layer composite structure of the automotive brake pipe according to claim 1, characterized in that: The outer braided layer (114) is made of 1050DPET impregnated yarn to enhance the strength of the brake tube, and the braiding angle α is 58-60°. The inner braided layer (112) is made of PVA impregnated yarn, and the braiding angle β is 55-57°.

4. The multi-layer composite structure of the automotive brake pipe according to claim 1, characterized in that: The inner braided layer (112) and the outer braided layer (114) are provided with a middle rubber layer (113) for cushioning. The middle rubber layer (113) is made of SBR material to reduce the displacement of the braided layers and frictional heat generation. The thickness is 0.3-0.4mm.

5. The multi-layer composite structure of the automotive brake pipe according to claim 1, characterized in that: The inner adhesive layer (111) is made of EPDM material and has a thickness of 1.0±0.1mm.

6. The multi-layer composite structure of the automotive brake pipe according to claim 1, characterized in that: The limiting component (200) includes a clamp (214), and the two ends of the C-shaped opening of the clamp (214) are connected to a first recess (212) and a second recess (210).

7. The multi-layer composite structure of the automotive brake pipe according to claim 6, characterized in that: A tightening rod (213) is rotatably provided on one side of the second recess (210), and a slot is provided inside the first recess (212). A hexagonal nut (211) is threaded through the outer side of the slot of the tightening rod (213).

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