Electronic parking brake assembly waterproof structure convenient to assemble

Abstract

The utility model discloses an electronic parking brake assembly waterproof structure convenient to assemble. The electronic parking brake assembly waterproof structure comprises an EPB guide column, a threaded sleeve, a first O-shaped ring, a nylon connector, a second O-shaped ring, a rectangular ring, a sheath, a steel wire rope and a transmission shaft structure. The first O-shaped ring is assembled on the inner wall of a groove of the EPB guide column, the second O-shaped ring is assembled on the inner wall of a groove of the nylon connector, the rectangular ring is assembled at the optical axis end of the nylon connector, and the EPB guide column and the threaded sleeve are assembled and then are screwed and fixed through threads, so that after the threaded sleeve and the EPB guide column are connected and fixed through the threads, the EPB guide column and the nylon connector are fixed through the threads. The sealing point is radially sealed by the first O-shaped ring to ensure the waterproof effect, and the two ends of the nylon joint are limited and fixed by the EPB guide column and the thread sleeve, so that after the thread sleeve and the nylon joint are limited and fixed, the dense point seal is radially sealed by the second O-shaped ring and sealed by the end face of the rectangular ring to ensure the waterproof effect. A complex mechanical connection structure is omitted, the structure is simple, and adaptation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and particularly relates to a waterproof structure of an electronic parking brake assembly which is convenient for assembly. Background Technique

[0002] At present, with the development of automotive intelligent technology, the brake cable, as an important component in the automotive parking system, transmits force during the parking process. Therefore, the sealing between the electronic parking actuator and the cable in the automotive parking system becomes more important. If water enters due to poor sealing between the electronic parking actuator and the cable, firstly, it will corrode the internal components. Also, when the temperature is below 0°C, this water will freeze, causing the cable to be unable to be pulled. Poor sealing will also cause the internal lubricating grease to volatilize, not only making parking laborious but also causing internal wear and reducing the service life. Therefore, inventing a sealing structure for the parking wire rope assembly is of great help to the safety and service life of the vehicle.

[0003] However, in actual use of the prior art, the existing solution one (CN116001763A): In this technical solution, the electronic parking brake assembly has no other waterproof structure, and the assembly is directly connected to the parking wire rope assembly. Without a waterproof structure, if water enters the parking wire rope assembly, it will cause the electronic parking brake assembly to fail and the entire mechanism cannot continue to work;

[0004] The existing solution two (CN201911230013.7): In this technical solution, similarly, the electronic parking brake assembly is connected to the parking wire rope assembly to complete the parking and release functions of the whole vehicle. Without a waterproof structure design, the entire mechanism will fail after water enters;

[0005] In the above technical solutions, their structures do not have a waterproof structure solution for water ingress into the parking wire rope assembly. After water enters at the connection, the electronic parking brake assembly will fail due to water ingress, inevitably causing harm to the vehicle and personnel. Content of the Utility Model

[0006] The purpose of the utility model is to provide a waterproof structure of an electronic parking brake assembly which is convenient for assembly, so as to solve the problems raised in the above background technique. If the sealing between the electronic parking actuator and the cable is not good and water enters, firstly, it will corrode the internal components. Also, when the temperature is below 0°C, this water will freeze, causing the cable to be unable to be pulled. Poor sealing will also cause the internal lubricating grease to volatilize, not only making parking laborious but also causing internal wear and reducing the service life.

[0007] To achieve the above purpose, the utility model provides the following technical solutions: It includes an EPB guide post, a screw sleeve, a first O-ring, a nylon joint, a second O-ring, a rectangular ring, a sheath, a wire rope, and a drive shaft structure;

[0008] The first O-ring is assembled on the inner wall of the groove of the EPB guide post, the second O-ring is assembled on the inner wall of the groove of the nylon joint, the rectangular ring is assembled at the optical axis end of the nylon joint, and after the assembly between the EPB guide post and the screw sleeve, the thread is tightened and fixed. After the screw sleeve is threadedly connected and fixed to the EPB guide post, its sealing point is radially sealed by the first O-ring to ensure the waterproof effect. Both ends of the nylon joint are limited and fixed by the EPB guide post and the screw sleeve. After the screw sleeve is limited and fixed to the nylon joint, its sealing point is double-sealed by the radial sealing of the second O-ring and the end face sealing of the rectangular ring to ensure the waterproof effect.

[0009] Preferably, the rectangular ring fits against the shoulder of the nylon joint.

[0010] Preferably, the nylon joint and the sheath are integrally formed by injection molding, so as to ensure the waterproof effect between the two through the integral injection molding of the sheath and the nylon joint.

[0011] Preferably, the steel wire rope moves axially inside the sheath.

[0012] Preferably, the hexagonal head at the front end of the steel wire rope is placed inside the U-shaped groove of the drive shaft structure.

[0013] Preferably, the steel wire rope and the drive shaft structure are connected to each other and limited by the U-shaped structure at the end face of the drive shaft structure, so that the drive shaft structure drives the steel wire rope to move axially during movement.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. A new sealing layout and working mode of the present invention, in which the sealing is integrated between the EPB actuator assembly and the cable assembly: the sealing form structure is connected to the original assembly and the EPB actuator assembly, and two sealing forms are established by using the cooperation mode between the original components, and does not participate in the tensioning and releasing functions; it has the advantages of eliminating complex mechanical connection structures, having a simple structure, and being convenient for adaptation;

[0016] 2. The connection form of the sealing structure of the present invention: between the EPB guide post and the screw sleeve, the first O-ring is assembled on the inner wall of the groove of the EPB guide post, between the screw sleeve and the nylon joint, the second O-ring is assembled on the inner wall of the groove of the nylon joint, and the rectangular ring is sleeved at the end face of the nylon joint to form a double-structure seal. During assembly, under the extrusion of the screw sleeve and the EPB guide post, the first O-ring and the second O-ring are compressed to fill the closed space to achieve sealing; it has the advantages of simple structure and convenient assembly.

[0017] 3. The multiple sealing forms of the present utility model: The first O-ring and the second O-ring are respectively assembled on the inner wall of the groove of the EPB guide post and the inner wall of the groove of the nylon joint, so that the first O-ring and the second O-ring generate radial compression with the inner wall of the groove, and the static radial compression sealing of the first O-ring and the second O-ring is used for waterproofing; the rectangular ring realizes static axial sealing for waterproofing by means of gap compression during assembly; and it has the advantages of dust prevention, waterproofing and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic diagram of the overall structure of a waterproof structure of an electronic parking brake assembly that is convenient for assembly according to the present utility model;

[0019] Figure 2 FIG. is a schematic diagram of a partial structure of a waterproof structure of an electronic parking brake assembly that is convenient for assembly according to the present utility model Figure 1 ;

[0020] Figure 3 FIG. is a schematic diagram of a partial structure of a waterproof structure of an electronic parking brake assembly that is convenient for assembly according to the present utility model Figure 2

[0021] Figure 4 FIG. is a schematic diagram of a partial structure of a waterproof structure of an electronic parking brake assembly that is convenient for assembly according to the present utility model Figure 3 .

[0022] In the figure: 1. EPB guide post; 2. Spiral sleeve; 3. First O-ring; 4. Nylon joint; 5. Second O-ring; 6. Rectangular ring; 7. Sheath; 8. Steel wire rope; 9. Drive shaft structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-4 , the present utility model provides a technical solution for a waterproof structure of an electronic parking brake assembly that is convenient for assembly: It includes an EPB guide post 1, a spiral sleeve 2, a first O-ring 3, a nylon joint 4, a second O-ring 5, a rectangular ring 6, a sheath 7, a steel wire rope 8 and a drive shaft structure 9;

[0025] The first O-ring 3 is assembled on the inner wall of the groove of the EPB guide post 1, the second O-ring 5 is assembled on the inner wall of the groove of the nylon joint 4, the rectangular ring 6 is assembled at the optical axis end of the nylon joint 4, and the rectangular ring 6 is in contact with the shoulder of the nylon joint 4. There is a structure as shown in Figure 4 After the structure shown is assembled, the thread is tightened and fixed. After the sleeve 2 and the EPB guide post 1 are threadedly connected and fixed, the sealing point is guaranteed to be waterproof by the radial seal of the first O-ring 3. Both ends of the nylon joint 4 are limited and fixed by the EPB guide post 1 and the sleeve 2. After the sleeve 2 and the nylon joint 4 are limited and fixed, the sealing point is double-sealed by the radial seal of the second O-ring 5 and the end face seal of the rectangular ring 6 to ensure the waterproof effect. The nylon joint 4 and the sheath 7 are integrally injection-molded, so that the waterproof effect between the two is ensured by the integral injection molding of the sheath 7 and the nylon joint 4;

[0026] The steel wire rope 8 moves axially inside the sheath 7. The hexagonal head at the front end of the steel wire rope 8 is placed inside the U-shaped groove of the transmission shaft structure 9. The steel wire rope 8 and the transmission shaft structure 9 are connected to each other and limited by the U-shaped structure at the end face of the transmission shaft structure 9, so that the transmission shaft structure 9 drives the steel wire rope 8 to move axially during movement.

[0027] Working principle: When in use, the utility model electronic parking brake assembly and the waterproof mechanism are arranged on the vehicle bottom chassis. The cable assembly (part) composed of the sleeve 2, the nylon joint 4, the second O-ring 5, the rectangular ring 6, the sheath 7 and the steel wire rope 8 is threadedly connected with the EPB guide post 1 equipped with the first O-ring 3. After the nylon joint 4 is limited and fixed and reaches the specified torque, the axial end face of the assembled rectangular ring 6 is compressed, the second O-ring 5 is radially compressed and matched, and the first O-ring 3 is radially compressed and sealed, ensuring double sealing before and after between the nylon joint 4 and the EPB guide post 1. When the mechanism operates, the transmission shaft structure 9 drives the steel wire rope 8 to move axially to realize parking and release. When the vehicle is driving in a harsh environment, it avoids the influence factors of water ingress from either the sleeve 2 and the nylon joint 4 or the threaded fit between the sleeve 2 and the EPB guide post 1, and realizes the electronic parking function;

[0028] The beneficial effects include:

[0029] 1. A new sealing layout and working method with the seal integrated between the EPB actuator assembly and the cable assembly: The sealing form structure is connected with the original assembly and the EPB actuator assembly, and two sealing forms are established by using the cooperation method between the original components, and it does not participate in the tensioning and releasing functions; it has the advantages of eliminating the complex mechanical connection structure, having a simple structure and being convenient for adaptation.

[0030] 2. Connection form of the sealing structure: Between the EPB guide post 1 and the screw sleeve 2, the first O-ring 3 is assembled on the inner wall of the groove of the EPB guide post 1. Between the screw sleeve 2 and the nylon joint 4, the second O-ring 5 is assembled on the inner wall of the groove of the nylon joint 4. The rectangular ring 6 is sleeved at the end face of the nylon joint 4 to form a double-structure seal. During assembly, under the extrusion of the screw sleeve 2 and the EPB guide post 1, the first O-ring 3 and the second O-ring 5 are compressed to fill the closed space to achieve sealing; it has the advantages of simple structure and convenient assembly.

[0031] 3. Multiple sealing forms: The first O-ring 3 and the second O-ring 5 are respectively assembled on the inner wall of the groove of the EPB guide post 1 and the inner wall of the groove of the nylon joint 4, so that the first O-ring 3 and the second O-ring 5 respectively generate radial compression with the inner wall of the groove. The first O-ring 3 and the second O-ring 5 are used for static radial compression sealing to prevent water; the rectangular ring 6 uses the gap compression during assembly to achieve static axial sealing to prevent water; and it has the advantages of dust prevention, water prevention and high reliability.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof structure of an electronic parking brake assembly that is easy to assemble, characterized in that: It comprises an EPB guide column (1), a screw sleeve (2), a first O-ring (3), a nylon joint (4), a second O-ring (5), a rectangular ring (6), a sheath (7), a steel wire rope (8) and a transmission shaft structure (9); The first O-ring (3) is mounted on the inner wall of the groove of the EPB guide column (1), the second O-ring (5) is mounted on the inner wall of the groove of the nylon joint (4), and the rectangular ring (6) is mounted on the optical axis end of the nylon joint (4). After the EPB guide column (1) and the screw sleeve (2) are assembled, the threads are tightened and fixed, so that after the screw sleeve (2) and the EPB guide column (1) are threadedly connected and fixed, the sealing point is radially sealed by the first O-ring (3) to ensure the waterproof effect, and the two ends of the nylon joint (4) are limited and fixed by the EPB guide column (1) and the screw sleeve (2), so that after the screw sleeve (2) and the nylon joint (4) are limited and fixed, the sealing point is double sealed by the second O-ring (5) radial seal and the rectangular ring (6) end face seal to ensure the waterproof effect.

2. The waterproof structure of an electronic parking brake assembly that is easy to assemble according to claim 1 is characterized in that: The rectangular ring (6) fits closely to the shoulder of the nylon joint (4).

3. The waterproof structure of an electronic parking brake assembly that is easy to assemble according to claim 2 is characterized in that: The nylon joint (4) and the sheath (7) are integrally formed by injection molding, so that a waterproof effect between the sheath (7) and the nylon joint (4) is ensured by the integral injection molding of the sheath (7) and the nylon joint (4).

4. The waterproof structure of an electronic parking brake assembly that is easy to assemble according to claim 3 is characterized in that: The steel wire rope (8) moves axially inside the sheath (7).

5. The waterproof structure of an electronic parking brake assembly that is easy to assemble according to claim 4 is characterized in that: The hexagonal head at the front end of the steel wire rope (8) is placed inside the U-shaped groove of the transmission shaft structure (9).

6. The waterproof structure of an electronic parking brake assembly that is easy to assemble according to claim 5 is characterized in that: The steel wire rope (8) and the transmission shaft structure (9) are connected to each other and are limited by a U-shaped structure on the end surface of the transmission shaft structure (9), so that when moving, the transmission shaft structure (9) drives the steel wire rope (8) to move axially.

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