Internal and external double-sealing structure of electronic parking brake assembly

Abstract

The utility model discloses an internal and external double-sealing structure of an electronic parking brake assembly, which comprises a threaded sleeve, a pull rod is arranged in the threaded sleeve, an X-shaped ring is arranged between the pull rod and the threaded sleeve, a guide bushing is fixedly arranged on the outer side surface of the pull rod, a dustproof ring is arranged on one side of the guide bushing in the threaded sleeve, and a sealing ring is arranged on the other side of the guide bushing. The outer sides of the pull rod and the threaded sleeve are sleeved with a dust cover, and nuts are arranged on the sides, away from the threaded sleeve, of the dust cover and the pull rod. The sealing device is good in using effect, a multi-sealing mode is adopted from outside to inside, sealing ring structures are additionally arranged at the two ends of the dustproof cover and are fastened through the hoops, large-particle impurities are isolated, the dustproof ring isolates fine dust and oil sludge, and therefore the sealing and protecting effect of the device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic parking brake sealing, in particular to an internal and external double-sealing structure of an electronic parking brake 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 becomes more important. If the sealing is not good and water enters, it will first 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 grease to volatilize, not only making parking laborious but also causing internal wear and reducing the service life. Therefore, in view of the above problems, an internal and external double-sealing structure of an electronic parking brake assembly is needed. Content of the Utility Model

[0003] The purpose of the utility model is to provide an internal and external double-sealing structure of an electronic parking brake assembly to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an internal and external double-sealing structure of an electronic parking brake assembly, including a screw sleeve, a pull rod is arranged inside the screw sleeve, an X-ring is arranged between the pull rod and the screw sleeve, a guide bushing is fixedly arranged on the outer surface of the pull rod, a dust-proof ring is arranged on one side of the guide bushing inside the screw sleeve, a dust-proof cover is sleeved outside the pull rod and the screw sleeve, and a nut is arranged on the side of the dust-proof cover away from the screw sleeve of the pull rod.

[0005] Preferably, a fixed bracket is fixedly arranged at one end of the pull rod, and a nylon joint is fixedly arranged on the outside of the fixed bracket; through the fixed bracket and the nylon joint, it is convenient to connect the pull rod and the cable structure of the electronic parking brake.

[0006] Preferably, a snap ring is fixedly arranged on the surface of the dust-proof ring, and the snap ring can ensure the stability of the dust-proof ring fixed inside the screw sleeve.

[0007] Preferably, an O-ring is fixedly arranged on one side inside the screw sleeve, and the O-ring and the X-ring cooperate to further ensure the sealing effect inside the screw sleeve.

[0008] Preferably, clamping rings are arranged on both sides of the surface of the dust-proof cover; the two ends of the dust-proof cover are fastened to the nut and the screw sleeve groove by the clamping rings, and move reciprocally with the pull rod, serving as the first layer of protection during the movement.

[0009] Preferably, a cable is connected to one end of the pull rod through a fixed bracket and a nylon joint, and the end of the screw rod away from the cable is connected to the EPB actuator.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model adopts multiple sealing forms from the outside to the inside. Sealing ring structures are added at both ends of the dust cover and fastened by clamps to isolate large particles of impurities. The dust ring isolates fine dust and sludge. The X-ring is compressed and sealed. At the same time, the device arranges the X-ring, guide bushing, dust ring, protection and guide inside the screw sleeve to realize their respective functions, thereby eliminating complex mechanical connection structures, with simple structure and convenient adaptation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of an internal and external double sealing structure of an electronic parking brake assembly of the utility model;

[0013] Figure 2 The utility model is a cross-sectional view of an inner and outer double sealing structure of an electronic parking brake assembly.

[0014] In the figure: 1. Screw sleeve; 2. Pull rod; 3. X-ring; 4. Guide bushing; 5. Dust ring; 6. Dust cover; 7. Nut; 8. Fixed bracket; 9. Nylon joint; 10. Retaining spring; 11. O-ring; 12. Clamp. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-2 The utility model provides a technical solution: an inner and outer double sealing structure of an electronic parking brake assembly, comprising a screw sleeve 1, a pull rod 2 is arranged inside the screw sleeve 1, an X-shaped ring 3 is arranged between the pull rod 2 and the screw sleeve 1, a guide bushing 4 is fixedly arranged on the outer surface of the pull rod 2, a dust ring 5 is arranged on one side of the guide bushing 4 inside the screw sleeve 1, a dust cover 6 is arranged on the outer side of the pull rod 2 and the screw sleeve 1, and a nut 7 is arranged on the side of the dust cover 6 and the pull rod 2 away from the screw sleeve 1.

[0017] A fixing bracket 8 is fixedly provided at one end of the pull rod 2, and a nylon joint 9 is fixedly provided on the outer side of the fixing bracket 8; the pull rod 2 and the cable structure of the electronic parking brake can be conveniently connected through the fixing bracket 8 and the nylon joint 9;

[0018] A snap ring 10 is fixedly arranged on the surface of the dust-proof ring 5, and the snap ring 10 can ensure the stability of the dust-proof ring 5 fixed inside the screw sleeve 1;

[0019] An O-ring 11 is fixedly arranged on one side inside the screw sleeve 1. The cooperation of the O-ring 11 and the X-ring 3 can further ensure the sealing effect inside the screw sleeve 1;

[0020] Clamps 12 are arranged on both sides of the surface of the dust-proof cover 6; the two ends of the dust-proof cover 6 are fastened to the grooves of the nut 7 and the screw sleeve 1 by the clamps 12 and move reciprocally with the pull rod 2, serving as the first layer of protection during the movement;

[0021] One end of the pull rod 2 is connected with a cable through a fixed bracket 8 and a nylon joint 9, and the end of the screw rod far from the cable is connected with an EPB actuator.

[0022] The waterproof structure of the electronic parking brake assembly of the present application is composed of a screw sleeve 1, a pull rod 2, an X-ring 3, a guide bushing 4, a dust-proof ring 5 and a snap ring 10. The X-ring 3 is assembled in the groove inside the screw sleeve 1 through corresponding tooling, and the guide bushing 4 is press-fitted into the screw sleeve 1 to guide the pull rod 2. The dust-proof ring 5 is press-fitted and embedded in the annular groove opened inside the screw sleeve 1, and is in close contact with the surface of the pull rod 2, and is combined with the snap ring 10, so as to form a layer of sealing effect with the pull rod 2.

[0023] Its working principle is as follows:

[0024] The electronic parking brake assembly and the waterproof mechanism are arranged on the vehicle bottom chassis. The front cable is fixed by the fixed bracket 8 to ensure that there is no large inclination angle. When the driver activates the electronic parking switch, the actuator EPB starts to perform the tightening or releasing action. The EPB starts to pull the pull rod 2, and the pull rod 2 pulls the cable to transmit the force. The nut 7 ensures that the cable does not break away from the pull rod 2. The pull rod 2 reciprocates inside the screw sleeve 1. The X-ring 3 is squeezed between the outside of the pull rod 2 and the groove of the screw sleeve 1 as the final protection for sealing; the guide bushing 4 ensures that the pull rod 2 can reciprocate inside the screw sleeve 1 while maintaining the required axial position; the dust-proof ring 5 prevents small particle dust from entering when the pull rod 2 reciprocates, and the snap ring 10 protects the position of the dust-proof ring 5. The two ends of the dust-proof cover 6 are fastened to the grooves of the nut 7 and the screw sleeve 1 by the clamps 12 and move reciprocally with the pull rod 2, serving as the first layer of protection during the movement; thus, this device adopts multiple sealing forms from the outside to the inside. Sealing ring structures are added at both ends of the dust-proof cover and fastened by clamps to isolate large particle impurities, the dust-proof ring isolates fine dust and sludge, and the X-ring is compressed for sealing. It has the advantages: multiple protections and reliability.

[0025] It should be noted that in this text, 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 "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An internal and external double-sealing structure of an electronic parking brake assembly, including a screw sleeve (1), characterized in that: Inside the screw sleeve (1), a pull rod (2) is provided. An X-ring (3) is arranged between the pull rod (2) and the screw sleeve (1). A guide bushing (4) is fixedly arranged on the outer surface of the pull rod (2). A dust-proof ring (5) is arranged on one side of the guide bushing (4) inside the screw sleeve (1). A dust-proof cover (6) is sleeved on the outer sides of the pull rod (2) and the screw sleeve (1). A nut (7) is arranged on the side of the dust-proof cover (6) away from the screw sleeve (1) and the pull rod (2).

2. The internal and external double-sealing structure of an electronic parking brake assembly according to claim 1, characterized in that: One end of the pull rod (2) is fixedly provided with a fixed bracket (8), and a nylon joint (9) is fixedly arranged on the outer side of the fixed bracket (8).

3. The internal and external double-sealing structure of an electronic parking brake assembly according to claim 1, wherein: A circlip (10) is fixedly arranged on the surface of the dust-proof ring (5).

4. The internal and external double-sealing structure of an electronic parking brake assembly according to claim 1, characterized in that: An O-ring (11) is fixedly arranged on one side inside the screw sleeve (1).

5. The internal and external double-sealing structure of an electronic parking brake assembly according to claim 1, wherein: Clamps (12) are arranged on both sides of the surface of the dust-proof cover (6).

6. The internal and external double-sealing structure of an electronic parking brake assembly according to claim 1, characterized in that: One end of the pull rod (2) is connected with a cable through the fixed bracket (8) and the nylon joint (9).

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