Vibration damping unit

Abstract

The utility model discloses a vibration damping unit, and belongs to the technical field of automobile parts, the vibration damping unit comprises a support, a vibration damping part and a compression ring, the support is integrally of a circular ring structure, the vibration damping part wraps the bottom of the support, the compression ring is clamped with the inner wall surface of the support, and an exploder is fixedly pressed on the inner bottom surface of the support through the compression ring. A plurality of supporting columns which are arranged in a protruding mode in the radial direction are arranged on the inner wall face of the pressing ring, and the supporting columns make contact with the periphery of the exploder for limiting. The pressing ring is additionally arranged, so that the middle exploder is better prevented from falling off and axial displacement of the exploder is better prevented, and abnormal sound caused by a gap between the exploder and a plastic part is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to a vibration damping unit. Background Art

[0002] In order to reduce the damage to the driver caused by the huge inertial force when the car has a head-on collision, the car is generally equipped with an airbag system in the center of the steering wheel in front of the driver. The vibration damper is usually used in mid-to-high-end models to connect the gas generator and the airbag bracket. When the car has a head-on collision, the rubber part of the shock-absorbing block of the gas generator in the airbag module can effectively buffer the recoil force generated when the gas generator explodes. At the same time, this part also plays a role in vibration reduction and noise reduction during normal driving, thereby improving the stability and comfort of the vehicle.

[0003] Related prior art, such as the Chinese patent application "A New Type of Automobile Steering Wheel Vibration Damping Unit", application number: CN202222242461.2, discloses a bracket and a damping member, wherein the bracket includes a bottom ring of annular structure and a side ring arranged around the outer ring of the bottom ring, and the bracket is L-shaped in a cross section passing through its axis, and the inner wall surface of the side ring is provided with a plurality of protrusions, and there is a spacing between the protrusions and the bottom ring; the bottom ring is provided with a locating pin, and the bottom ring is provided with a first notch of a U-shaped structure, and the first notch surrounds the outer periphery of the locating pin. The detachable locating pin and the protrusion are designed to realize assembly with the disc-shaped matching part by rotation.

[0004] The original vibration damping unit structure uses multiple undercut convex clamps to prevent the matching part in the middle, that is, the detonator, from falling off. However, the simple convex structure has a poor fixing effect on the detonator, and abnormal noise will be caused by the gap between the detonator and the plastic part. Utility Model Content

[0005] The technical problem to be solved by the present application is to provide a vibration damping unit, in which a pressure ring is added to better prevent the intermediate detonator from falling off and the axial displacement of the detonator, and reduce abnormal noise caused by the gap between the detonator and the plastic part.

[0006] The technical solution adopted in the present application is: a vibration damping unit, including a bracket, a vibration damping member and a pressure ring, the bracket as a whole is a circular ring structure, the vibration damping member wraps the bottom of the bracket, the pressure ring is clamped with the inner wall surface of the bracket, the detonator is pressed and fixed to the inner bottom surface of the bracket by the pressure ring, and the inner wall surface of the pressure ring is provided with a plurality of support columns protruding radially, and the support columns are in contact with the circumference of the detonator to limit the position.

[0007] Compared with the prior art, the advantage of the present application is that a pressure ring structure is added, and the detonator is fixed to the inner bottom surface of the bracket through the pressure ring. The pressure ring of the present application is clamped with the inner wall surface of the bracket, and the pressure ring can be quickly pressed into place. Moreover, the detonator is pressed and limited by a pressure ring with a whole annular structure, which can better prevent the detonator from falling off compared with the prior art. Furthermore, the inner wall surface of the pressure ring of the present application is provided with a plurality of support columns protruding radially, and the axial displacement of the detonator can be accurately and stably limited by the contact limitation of the support columns with the circumference of the detonator. The present application can limit and fix the detonator in the axial and radial directions, thereby reducing abnormal noise caused by the gap between the detonator and the plastic part.

[0008] In some embodiments of the present application, the bracket includes a bottom ring of a circular ring structure and side rings arranged around the outer ring of the bottom ring, and the bracket is L-shaped in a cross section passing through its axis.

[0009] In some embodiments of the present application, an L-shaped slot is provided on the side ring, the opening of the slot is provided on the top surface of the side ring, and a cam is provided on the outer circumference of the pressure ring corresponding to the slot. That is, in the present application, the cam can be embedded into the slot from the top surface of the side ring and the opening of the slot, and then move along the L-shaped slot. When the cam is embedded into the end of the slot, the pressure ring and the bracket are connected. When the two need to be disassembled, the cam is driven to move in the opposite direction and exit the slot. The slot with the above-mentioned structure can better avoid axial displacement of the detonator.

[0010] In some embodiments of the present application, a limiting opening is provided on the side ring, and a spring sheet is provided on the outer circumferential surface of the pressure ring. The pressure ring rotates relative to the bracket so that the end of the spring sheet is embedded in the limiting opening; when the end of the spring sheet is embedded in the limiting opening, the pressure ring is limited in the circumferential direction relative to the bracket and does not move.

[0011] The pressure ring of the present application is designed with a spring piece, so that the pressure ring and the bracket are limited and fixed to prevent it from rotating out. If disassembly is required later, the operator can also press the spring piece to make the spring piece exit the limit mouth and then rotate out of the clamping relationship of the pressure ring.

[0012] In some embodiments of the present application, the clamping protrusion is embedded in the end of the clamping groove, and the spring piece is embedded in the limiting opening. That is to say, when the pressure ring and the bracket are clamped, the pressure ring and the bracket are also limited in the circumferential direction. In the absence of external force, the clamping of the pressure ring and the bracket is stable and reliable and will not fall off.

[0013] In some embodiments of the present application, a positioning opening is provided on the side ring, there is a spacing between the positioning opening and the limiting opening, and the positioning opening passes through the top surface of the side ring; the end of the spring sheet is located at the positioning opening, and the latch is located at the opening of the latch slot.

[0014] In the present application, the positioning opening and the end of the spring piece can realize the rapid positioning of the card protrusion and the card slot opening, which further facilitates the assembly and disassembly of the operator.

[0015] In some embodiments of the present application, a side surface of the positioning opening close to the limiting opening is an inclined guiding surface, and a side surface of the positioning opening away from the limiting opening is a blocking surface.

[0016] The setting of the guide surface enables the spring to rotate relatively toward the limit opening when located at the positioning opening, and the setting of the blocking surface effectively limits the reverse rotation of the pressing ring to avoid damaging the card convexity.

[0017] In some embodiments of the present application, the pressure ring includes a top ring of a circular ring structure and an inner ring arranged around the inner side of the top ring, and the pressure ring is in an inverted L-shape in a cross section passing through its axis.

[0018] In some embodiments of the present application, the protrusions and the springs are arranged on the top ring, and the support columns are arranged on the inner ring. Specifically, in the present application, 8 support columns are evenly arranged on the pressure ring, which is the preferred solution of the present application, so as to avoid abnormal noise caused by radial deviation of the detonator.

[0019] In some embodiments of the present application, the vibration damper includes a lining wrapped around the outer side of the bracket and an elastic leg disposed on the lining, the bracket is connected to one side of the lining, and the elastic leg is located on the other side of the lining. Specifically, in the present application, the lining has four elastic legs evenly distributed.

[0020] The above-mentioned implementation modes can be combined arbitrarily based on the common knowledge in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the structure of this application;

[0023] Figure 2 A top view of the present application;

[0024] Figure 3 for Figure 2 Sectional view of section AA;

[0025] Figure 4This is a schematic diagram of the decomposition structure of this application.

[0026] Among them, the specific descriptions of the accompanying drawings are as follows: 1. bracket; 11. bottom ring; 12. side ring; 2. vibration damping member; 21. lining member; 22. elastic support leg; 3. pressure ring; 31. top ring; 32. inner ring; 4. support column; 5. slot; 6. protrusion; 7. limit opening; 8. spring piece; 9. positioning opening; 9a. guide surface. DETAILED DESCRIPTION

[0027] The present application is described in detail below in conjunction with the accompanying drawings.

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] A vibration damping unit, embodiment 1 is as follows Figure 1 to Figure 2 As shown: it includes a bracket 1, a vibration damper 2 and a pressure ring 3. The bracket 1 is annular in structure as a whole. The vibration damper 2 wraps the bottom of the bracket 1. The pressure ring 3 is clamped with the inner wall of the bracket 1. The detonator is pressed and fixed to the inner bottom of the bracket 1 by the pressure ring 3. The pressure ring 3 of the present application is clamped with the inner wall of the bracket 1, and the pressure ring 3 can be quickly pressed into place. Moreover, the detonator is pressed and fixed by the pressure ring 3 of the entire annular structure, which can better prevent the detonator from falling off compared with the prior art.

[0030] The inner wall of the pressure ring 3 is provided with a plurality of support columns 4 protruding in the radial direction, and the support columns 4 are contacted and limited with the circumference of the detonator. The axial displacement of the detonator can be accurately and stably limited. The present application can limit and fix the detonator in the axial and radial directions, thereby reducing abnormal noise caused by the gap between the detonator and the plastic part.

[0031] Embodiment 2, as Figures 1 to 4 As shown, the bracket 1 comprises a bottom ring 11 of annular structure and a side ring 12 arranged around the outer circle of the bottom ring 11. The bracket 1 is L-shaped in a cross section passing through its axis.

[0032] The side ring 12 is provided with an L-shaped slot 5, the opening of the slot 5 is arranged on the top surface of the side ring 12, and a latch 6 is arranged on the outer circumferential surface of the pressure ring 3 corresponding to the slot 5. That is, in the present application, the latch 6 can be embedded into the slot 5 from the top surface of the side ring 12 and the opening of the slot 5, and then move along the L-shaped slot 5. When the latch 6 is embedded into the end of the slot 5, the pressure ring 3 and the bracket 1 are connected. When the two need to be disassembled, the latch 6 is driven to move in the opposite direction to exit the slot 5. The slot 5 with the above-mentioned structure can better avoid the axial displacement of the detonator.

[0033] A limiting opening 7 is provided on the side ring 12, and a spring piece 8 is provided on the outer circumferential surface of the pressure ring 3. The pressure ring 3 rotates relative to the bracket 1 so that the end of the spring piece 8 is embedded in the limiting opening 7; when the end of the spring piece 8 is embedded in the limiting opening 7, the pressure ring 3 is limited in the circumferential direction relative to the bracket 1 and does not move.

[0034] The pressure ring 3 of the present application is designed with a spring piece 8, so that the pressure ring 3 can be prevented from rotating out after being limited and fixed with the bracket 1. If disassembly is required later, the operator can also press the spring piece 8 to make the spring piece 8 exit the limit opening 7 and then rotate out of the clamping relationship of the pressure ring 3.

[0035] The protrusion 6 is embedded in the end of the slot 5, and the spring 8 is embedded in the limit opening 7. That is to say, when the pressure ring 3 and the bracket 1 are connected, the pressure ring 3 and the bracket 1 are also limited in the circumferential direction. In the absence of external force, the connection between the pressure ring 3 and the bracket 1 is stable and reliable and will not fall off.

[0036] The side ring 12 is provided with a positioning opening 9, and there is a gap between the positioning opening 9 and the limiting opening 7, and the positioning opening 9 passes through the top surface of the side ring 12; the end of the spring sheet 8 is located at the positioning opening 9, and the clamping protrusion 6 is located at the opening of the clamping slot 5. In the present application, the positioning opening 9 and the end of the spring sheet 8 can realize the rapid positioning of the clamping protrusion 6 and the opening of the clamping slot 5, which further facilitates the assembly and disassembly of the operator.

[0037] The side of the positioning opening 9 close to the limiting opening 7 is an inclined guide surface 9a, and the side of the positioning opening 9 away from the limiting opening 7 is a blocking surface. The setting of the guide surface 9a allows the spring 8 to rotate relative to the limiting opening 7 when located at the positioning opening 9. The setting of the blocking surface effectively limits the reverse rotation of the pressing ring 3 to avoid damaging the clamping protrusion 6.

[0038] The rest of the content of the second embodiment is the same as that of the first embodiment.

[0039] Embodiment three, as Figures 1 to 4 As shown, the pressure ring 3 comprises a top ring 31 of annular structure and an inner ring 32 arranged around the inner side of the top ring 31. The pressure ring 3 is in an inverted L-shape in a cross section passing through its axis.

[0040] The protrusion 6 and the spring piece 8 are both arranged on the top ring 31, and the support column 4 is arranged on the inner ring 32. Specifically, in the present application, 8 support columns 4 are evenly arranged on the pressure ring 3, which is the preferred solution of the present application, so as to avoid abnormal noise caused by radial deviation of the detonator.

[0041] The vibration damper 2 includes a lining 21 wrapped around the outer side of the bracket 1, and an elastic leg 22 arranged on the lining 21. The bracket 1 is connected to one side of the lining 21, and the elastic leg 22 is located on the other side of the lining 21. Specifically, in the present application, the lining 21 has four elastic legs 22 evenly distributed.

[0042] The other contents of the third embodiment are the same as those of the first embodiment or the second embodiment.

[0043] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A vibration damping unit, characterized in that: The invention comprises a support (1), a vibration damping member (2) and a pressure ring (3); the support (1) is in an overall annular structure; the vibration damping member (2) wraps the bottom of the support (1); the pressure ring (3) is clamped with the inner wall surface of the support (1); the detonator is pressed and fixed to the inner bottom surface of the support (1) by the pressure ring (3); the inner wall surface of the pressure ring (3) is provided with a plurality of support columns (4) protruding in the radial direction; the support columns (4) are contacted and limited with the circumference of the detonator.

2. A vibration damping unit according to claim 1, characterized in that: The support (1) comprises a bottom ring (11) of a circular ring structure and a side ring (12) arranged around the outer ring of the bottom ring (11). The support (1) is L-shaped in a cross section passing through its axis.

3. A vibration damping unit according to claim 2, characterized in that: The side ring (12) is provided with an L-shaped slot (5), the opening of the slot (5) is arranged on the top surface of the side ring (12), and a locking protrusion (6) is arranged on the outer peripheral surface of the pressure ring (3) corresponding to the slot (5).

4. A vibration damping unit according to claim 3, characterized in that: The side ring (12) is provided with a limiting opening (7), and the outer circumferential surface of the pressure ring (3) is provided with a spring sheet (8). The pressure ring (3) rotates relative to the bracket (1) so that the end of the spring sheet (8) is embedded in the limiting opening (7); when the end of the spring sheet (8) is embedded in the limiting opening (7), the pressure ring (3) is limited in the circumferential direction relative to the bracket (1) and does not move.

5. A vibration damping unit according to claim 4, characterized in that: The locking protrusion (6) is embedded in the end of the locking groove (5), and the spring piece (8) is now embedded in the limiting opening (7).

6. A vibration damping unit according to claim 4, characterized in that: The side ring (12) is provided with a positioning opening (9), a distance exists between the positioning opening (9) and the limiting opening (7), and the positioning opening (9) passes through the top surface of the side ring (12); the end of the spring sheet (8) is located at the positioning opening (9), and the latching protrusion (6) is located at the opening of the latching groove (5).

7. A vibration damping unit according to claim 6, characterized in that: The side surface of the positioning opening (9) close to the limiting opening (7) is an inclined guide surface (9a), and the side surface of the positioning opening (9) away from the limiting opening (7) is a blocking surface.

8. A vibration damping unit according to claim 1, characterized in that: The pressure ring (3) comprises a top ring (31) of a circular ring structure and an inner ring (32) arranged around the inner side of the top ring (31); the pressure ring (3) is in an inverted L-shape in a cross section passing through its axis.

9. A vibration damping unit according to claim 7, characterized in that: The latching protrusion (6) and the spring sheet (8) are both arranged on the top ring (31), and the support column (4) is arranged on the inner ring (32).

10. A vibration damping unit according to claim 1, characterized in that: The vibration damping member (2) comprises a lining member (21) wrapped around the outer side surface of the bracket (1), and an elastic leg (22) arranged on the lining member (21); the bracket (1) is connected to one side surface of the lining member (21), and the elastic leg (22) is located on the other side surface of the lining member (21).

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