Automobile vacuum brake hose fixing band

Abstract

The invention discloses an automobile vacuum brake hose fixing band which comprises a fixing band body, a fixing column structure and a band locking clamp are arranged at one end of the fixing band body, and a sawtooth-shaped structure is arranged on the surface, in partial contact with a vacuum brake hose, of the fixing band body. The automobile vacuum brake hose fixing band is reasonable in structural design, a part of sawtooth-shaped structure is additionally arranged on the contact face of the automobile vacuum brake hose fixing band and the hose body, the sawtooth-shaped structure is made of TPV, the friction coefficient is large, the friction force for preventing axial movement of a vacuum brake hose body is increased structurally and material, and axial movement of the vacuum brake hose is prevented; and the cost is relatively low.

Description

Technical Field

[0001] The invention relates to the technical field of automobile vacuum brake hoses, in particular to an automobile vacuum brake hose fixing tie. Background Art

[0002] To solve the problem that the automobile vacuum brake hose is easy to move, it is very easy to interfere and rub with the surrounding parts, which will cause the vacuum brake pipeline to be worn and leak in the long term, resulting in hard braking of the vehicle and affecting braking safety. The automobile vacuum brake hose is fixed with ordinary cable ties and ordinary fixed rolling belts (material PA6). The surface of the cable tie is extremely smooth and it is very easy to slide relative to the surface of the vacuum brake pipe (material PA6). To prevent the automobile vacuum brake hose from moving, a rubber sheath (material EPDM) is usually added between the cable tie and the pipeline body.

[0003] like Figure 6 As shown, ordinary rolled strips cannot solve the axial movement of the automobile vacuum brake hose, and an EPDM rubber sheath 7 must be added at the same time to prevent the movement. The sheath makes it difficult to determine the fixed position of the existing cable tie 6 on the tube body, which increases the assembly process and assembly difficulty, thereby increasing the unit cost and labor cost. In order to solve this problem, there are also serrated structures on the cable ties, and most of the serrated structures are all on the cable ties, which increases the cost, reduces the contact area, and increases the hardness of the cable tie, which is not ideal for preventing axial movement.

[0004] For example, a wiring harness tie disclosed in patent CN216306400U comprises a tie head and a tie body; the tie head comprises a pressure plate, a connecting arm, a restraining end and a locking tongue; the locking tongue and the connecting arm are connected to the pressure plate, the locking tongue and the connecting arm are arranged at intervals, and the restraining end is connected to the connecting arm; a pressure plate through hole for the belt body to pass through is provided on the pressure plate, and the pressure plate through hole is located between the connecting arm and the locking tongue; a restraining end through hole for the belt body to pass through is provided on the restraining end; one end of the belt body is connected to the pressure plate, and the belt body and the locking tongue are connected to opposite sides of the pressure plate; the full serration setting increases the cost, the hardness of the tie is large, and the axial prevention of movement is poor. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an automobile vacuum brake hose fixing tie, which effectively improves the axial movement effect and has a relatively low cost.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] The automobile vacuum brake hose fixing tie comprises a fixing tie body, one end of which is provided with a fixing column structure and a tie locking card, and a sawtooth structure is provided on the contact surface between the fixing tie body and the vacuum brake hose part.

[0008] Further:

[0009] The fixed column structure comprises a guide hole end, a fixed hole column and a hole mounting surface, and the fixed hole column is provided with an inverted tooth structure.

[0010] The cable tie locking card is provided with an inclined surface or an arc surface structure contacting with the vacuum brake hose.

[0011] The sawtooth structure is a sawtooth block made of TPV material.

[0012] The arc surface structure is a contoured arc structure that matches the shape of the vacuum brake hose.

[0013] The fixing tie body is provided with a groove corresponding to the sawtooth block, and sawtooth structures are provided on both sides of the sawtooth block, and the sawtooth block is compounded in the groove.

[0014] The cable tie locking clip is provided with a protruding structure, and the contoured arc structure is provided on the protruding structure.

[0015] The groove on the fixing tie body is a rectangular annular groove.

[0016] The sawtooth block is provided with sharp teeth, which are arranged transversely.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The automobile vacuum brake hose fixing tie structure is reasonably designed, and a partial serrated structure is added to the contact surface with the hose body. The serrated structure material is TPV, which has a large friction coefficient. The friction force preventing the axial movement of the vacuum brake hose body is increased from the perspective of structure and material, thereby preventing the axial movement of the vacuum brake hose; and the cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following is a brief description of the contents and symbols in the drawings of this specification:

[0020] Figure 1 This is a schematic diagram of the application of the present invention on a whole vehicle.

[0021] Figure 2 The cable tie structure of the present invention is shown in FIG. Figure 1 .

[0022] Figure 3 The cable tie structure of the present invention is shown in FIG. Figure 2 .

[0023] Figure 4 for Figure 3 Enlarged schematic diagram at point A in the middle.

[0024] Figure 5This is a schematic diagram of the working state of the vacuum brake hose fixing tie of the present invention.

[0025] Figure 6 This is a schematic diagram of the existing cable tie application.

[0026] In the figure:

[0027] 1: Vacuum booster, 2: Fixed tie, 3: Body longitudinal beam plate, 4: Vacuum brake hose, 5: Electronic vacuum pump, 6: Existing tie, 7: Rubber sheath,

[0028] 8: fixing the cable tie body, 81: guide hole end, 82: fixing hole column, 83: hole mounting surface, 84: cable tie locking card, 85: TPV serrated block, 86: cable tie pull strip. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0030] like Figures 1 to 5 As shown, the automobile vacuum brake hose fixing tie includes a fixing tie body 8, which is a strip-shaped structure as a whole. One end of the fixing tie body 8 is provided with a fixing column structure and a tie locking card. The fixing column structure is used to be fixed on the corresponding sheet metal hole of the automobile, and the tie locking card is used to lock and fix the free end of the tie through.

[0031] The fixed column structure is arranged on one end of the fixed tie body 8. The fixed column structure and the fixed tie body are an integrated structure and can be integrally formed by injection molding. The structure is stable and reliable. The other end of the fixed tie body is a free end, and the free end is a pointed structure, which is convenient for passing through the card hole of the tie locking card. The fixed tie is easy to use and operate.

[0032] Preferably, the fixing column structure includes a guide hole end 81, a fixing hole column 82 and a hole mounting surface 83 arranged in sequence, and a reverse tooth structure is provided on the fixing hole column; the guide hole end is a semicircular head structure, which is convenient for inserting into the body sheet metal hole, and further the semicircular head structure is a cross-shaped arc rib structure, and the structure is stable and reliable;

[0033] A barb structure is provided on the outer edge of the fixed hole column to facilitate fixation; the hole mounting surface is a conical disk structure with a reliable structure; further, an annular groove is provided on the disk surface of the conical disk, and a sealing ring is provided in the annular groove. When the fixed column structure cooperates with the hole of the body sheet metal, the sealing ring on the conical disk contacts and seals with the body sheet metal, which can effectively improve the sealing performance of the connection and improve the NVH performance.

[0034] A serrated structure is provided on the surface of the fixing tie body 8 and the contact surface of the vacuum brake hose. When the automobile vacuum brake hose is fixed by the fixing tie 2, a part of the outer edge of the automobile vacuum brake hose cooperates with the serrated structure, and another part of the outer edge of the automobile vacuum brake hose contacts and cooperates with the surface of the tie body without the serrated structure. The serrations will be stuck on the outer edge of the hose, and the direct contact part can ensure the contact area, which can increase the friction force to prevent the axial movement of the vacuum brake hose body and prevent the axial movement of the vacuum brake hose.

[0035] The cable tie locking card is provided with an inclined surface or arc surface structure that contacts the vacuum brake hose. Furthermore, the cable tie locking card is provided with a protruding structure, and the contoured arc structure is provided on the protruding structure; the arc surface structure is a contoured arc structure that matches the shape of the vacuum brake hose. The above structure forms a protruding supporting arc surface, and the cable tie locking card generates a reverse force through the force supporting surface. The serrated block is elastically deformed under the force, and the required locking tooth position is adaptively found, which effectively improves the axial movement effect.

[0036] Preferably, the sawtooth structure is a sawtooth block made of TPV material. The sawtooth structure of thermoplastic vulcanized rubber has both certain hardness and certain elasticity, and has a good fixing effect.

[0037] The fixed cable tie body is provided with a groove corresponding to the sawtooth block, and the sawtooth block is provided with sawtooth structures on both sides, and the sawtooth block is compounded in the groove; the sawtooth block is provided with sharp teeth, and the sharp teeth are arranged horizontally. The groove on the fixed cable tie body is a rectangular annular groove, and the tooth structure is not arranged in a centralized manner, so the axial anti-movement effect is better.

[0038] The contact surface between the vacuum brake hose fixing tie and the hose body of the present invention is designed with a sawtooth structure. The tooth structure material is TPV, which has a large friction coefficient. The friction force to prevent the axial movement of the vacuum brake hose body is increased from the perspective of structure and material, and the axial movement of the vacuum brake hose is prevented. The assembly is convenient. After assembly and fixation, the vacuum brake hose can be effectively and accurately fixed, and the vacuum brake hose can be prevented from leaking due to friction with surrounding parts, thereby improving braking safety. Moreover, without affecting the performance of the vacuum brake hose, the number of parts and the difficulty of assembly are reduced, and the cost of parts and labor are saved. This product is being promoted for the first time in our company's car series products, and the use effect is very good.

[0039] The preferred specific embodiments of the present invention are:

[0040] The present invention is a vacuum brake hose fixing tie with a new material and structure. This new tie is designed with a serrated structure. On the one hand, the contact surface between the TPV serrated block 85 and the tie strip 86 is larger, ensuring that the two materials are fully integrated and increasing the bonding force between the two materials to prevent the serrated block from detaching from the tie body.

[0041] On the other hand, the serrated structure material is TPV material, which has both a certain hardness (shore A45) and a certain elasticity. When the cable tie fixes the vacuum brake hose, this type of serrated structure and the TPV material are extremely prone to elastic deformation in the working state, ensuring full contact with the tube body, thereby increasing the friction with the vacuum brake hose body.

[0042] In addition, this serrated elastomer structure is adaptable to pipes of different diameters and tolerances. It undergoes elastic deformation under force in the working state and can adaptively locate the most suitable locking tooth position for pipes of different diameters, ultimately ensuring a secure fixation to the pipe body.

[0043] In summary, this new type of cable tie with a new material and structure can effectively prevent the vacuum brake hose from rubbing against surrounding parts due to string movement, and eventually causing the risk of failure due to wear and tear and air leakage.

[0044] The vacuum brake hose 4 connects the vacuum booster 1 and the electronic vacuum pump 5. The electronic vacuum pump is fixed on the longitudinal beam plate 3 of the vehicle body. The vacuum brake hose needs to be positioned using the fixing tie 2 to prevent movement and wear. When the new type of fixed tie is installed on the vacuum brake hose tube body, it is necessary to insert the tie strip 86 around the tube body and pass through the tie locking card 84, then pull the tie strip 86 with force. The tie locking card generates a reverse force through the points on the force support surface. The TPV serrated block 85 is elastically deformed under the force and adaptively finds the required locking tooth position. At the same time, the tie's own tie locking card 84 is locked in the corresponding tooth position on the back of the tie strip 86, thereby fixing the tie on the vacuum brake hose tube body.

[0045] After the vacuum brake hose with the new cable tie is assembled, align the cable tie guide hole end 81 with the appropriate body sheet metal hole, press the hole mounting surface 83 by hand, and fix it in the body sheet metal hole through the "inverted eight thorns" on the fixing hole column 82.

[0046] This new material and structure of automobile vacuum brake hose fixing tie is suitable for panel sheet metal with a hole diameter of Ф6.5±0.2mm and a thickness of 0.6-4mm, and has a wide adaptability. It does not affect the performance of the vacuum brake hose, not only ensures that the vacuum brake hose is accurately fixed on the vehicle, but also effectively prevents the risk of the vacuum brake hose being worn and leaked, and can greatly reduce the number of parts and assembly difficulty, saving parts and labor costs.

[0047] The automobile vacuum brake hose fixing tie structure of the present invention is reasonably designed, and a partial serrated structure is added on the contact surface with the hose body. The serrated structure material is TPV, which has a large friction coefficient. The friction force preventing the axial movement of the vacuum brake hose body is increased from the perspective of structure and material, thereby preventing the axial movement of the vacuum brake hose; and the cost is relatively low.

[0048] The above is only an explanation of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0049] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A vehicle vacuum brake hose fixing tie, comprising a fixing tie body, one end of which is provided with a fixing column structure and a tie locking card, characterized in that: A sawtooth structure is provided on the contact surface between the surface of the fixing strap body and the vacuum brake hose portion.

2. The automobile vacuum brake hose fixing tie as claimed in claim 1, characterized in that: The fixed column structure comprises a guide hole end, a fixed hole column and a hole mounting surface, and the fixed hole column is provided with an inverted tooth structure.

3. The automobile vacuum brake hose fixing tie as claimed in claim 1, characterized in that: The cable tie locking card is provided with an inclined surface or an arc surface structure contacting with the vacuum brake hose.

4. The automobile vacuum brake hose fixing tie as claimed in claim 1, characterized in that: The sawtooth structure is a sawtooth block made of TPV material.

5. The automobile vacuum brake hose fixing tie as claimed in claim 3, characterized in that: The arc surface structure is a contoured arc structure that matches the shape of the vacuum brake hose.

6. The automobile vacuum brake hose fixing tie as claimed in claim 4, characterized in that: The fixing tie body is provided with a groove corresponding to the sawtooth block, and sawtooth structures are provided on both sides of the sawtooth block, and the sawtooth block is compounded in the groove.

7. The automobile vacuum brake hose fixing tie as claimed in claim 5, characterized in that: The cable tie locking clip is provided with a protruding structure, and the contoured arc structure is provided on the protruding structure.

8. The automobile vacuum brake hose fixing tie as claimed in claim 6, characterized in that: The groove on the fixing tie body is a rectangular annular groove.

9. The automobile vacuum brake hose fixing tie as claimed in claim 6, characterized in that: The sawtooth block is provided with sharp teeth, which are arranged transversely.

Images