Mounting structure of knob switch bearing

Abstract

The utility model discloses a knob switch bearing mounting structure, which comprises a shell, a rotating seat and a bearing, an inner tube is arranged on the shell, the rotating seat is rotatably arranged on the periphery of the inner tube, the bearing is arranged between the inner tube and the rotating seat, and an inner ring of the bearing is in interference fit with the inner tube. The outer ring of the bearing is in interference fit with the rotating seat; a plurality of positioning soft ribs used for abutting against a bearing inner ring are arranged on the periphery of the inner pipe, and a plurality of sets of elastic structures are further arranged at the radial matching position of the inner pipe and the bearing inner ring. According to the utility model, the elastic structure is additionally arranged at the radial matching part of the shell and the bearing, the elastic structure can still ensure the shaking quantity of the bearing although the positioning soft rib is extruded and deformed after high temperature, and good product experience is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to an installation structure of a knob switch bearing on an automobile. Background Art

[0002] At present, the knob switches used on automobiles generally include a housing, a rotating seat installed inside the housing, a bearing arranged between the rotating seat and the housing, and a knob installed on the rotating seat.

[0003] When using a bearing for a knob switch, in order to ensure the wobble amount of the knob, an interference soft rib fit is adopted for the positioning structure between the housing (plastic part) and the bearing (metal part). Due to the different thermal expansion coefficients of plastic and metal, when the switch undergoes a high-temperature test, the positioning soft rib is squeezed and deformed. After returning to normal temperature, a gap will be generated between the housing and the bearing, resulting in wobbling abnormal noise and affecting the product experience. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an installation structure of a knob switch bearing. The utility model adds an elastic structure at the radial fit between the housing and the bearing. Although the positioning soft rib is squeezed and deformed after high temperature, the elastic structure can still ensure the wobble amount of the bearing, thus ensuring a good product experience.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an installation structure of a knob switch bearing, including a housing, a rotating seat and a bearing. An inner tube is provided on the housing. The rotating seat is rotatably arranged on the outer periphery of the inner tube. The bearing is arranged between the inner tube and the rotating seat. The inner ring of the bearing is in interference fit with the inner tube, and the outer ring of the bearing is in interference fit with the rotating seat. A plurality of positioning soft ribs for abutting against the inner ring of the bearing are provided on the outer periphery of the inner tube. A plurality of groups of elastic structures are also provided at the radial fit between the inner tube and the inner ring of the bearing.

[0006] By adopting the above technical solution, an elastic structure is added at the radial fit between the housing and the bearing. Although the positioning soft rib is squeezed and deformed after high temperature, and a gap is generated between the housing and the bearing after returning to normal temperature, since the elastic structure always abuts against the inner ring of the bearing, that is, the elastic structure can still ensure the wobble amount of the bearing, thus ensuring a good product experience.

[0007] The utility model is further arranged such that a plurality of groups of elastic structures are distributed in a circumferential array on the outer periphery of the inner tube. The elastic structure includes an elastic block arranged on the inner tube and capable of deforming radially along the inner tube under force. The outer end of the elastic block protrudes from the outer circular surface of the inner tube and abuts against the inner ring of the bearing.

[0008] By adopting the above technical solution, not only the force is uniform, but also the elastic block exerts a reaction force on the bearing after deformation, which can effectively abut against the bearing.

[0009] The present utility model is further configured such that the elastic block and the inner tube are of an integral structure.

[0010] By adopting the above technical solution, the structure is simple and reliable, with high strength and convenient processing.

[0011] The present utility model is further configured such that the elastic block includes a deformation portion extending along the axial direction of the inner tube and a force-receiving portion provided at the end of the deformation portion and extending towards the bearing, and the force-receiving portion abuts against the inner ring of the bearing.

[0012] By adopting the above technical solution, the force-receiving portion protrudes outwards, and when it is deformed by force, it can effectively generate a reaction force on the outer ring of the bearing to abut against the bearing tightly.

[0013] The present utility model is further configured such that a guiding inclined surface is provided at the upper end of the force-receiving portion.

[0014] By adopting the above technical solution, it plays a guiding role in the installation of the bearing, making it more conducive to the installation operation of the bearing.

[0015] The present utility model is further configured such that a plurality of relief through holes equal in number to the elastic blocks are provided on the inner tube, and the elastic blocks are arranged in the corresponding relief through holes.

[0016] By adopting the above technical solution, the relief through holes play a role of making way, ensuring that the elastic blocks can deform smoothly along the radial direction of the inner tube without interference.

[0017] The present utility model is further configured such that the height of the elastic block is less than the height of the relief through hole.

[0018] By adopting the above technical solution, a relief gap can be formed between the top end of the elastic block and the top end of the relief through hole, avoiding interference at the upper end when the elastic block deforms.

[0019] The present utility model is further configured such that a plurality of reinforcing convex surfaces equal in number to the elastic blocks are provided on the inner circular surface of the inner tube, and the elastic blocks are arranged within the range surrounded by the corresponding reinforcing convex surfaces.

[0020] By adopting the above technical solution, the strength of the inner tube corresponding to the elastic block part can be increased, avoiding tearing at the connection part between the elastic block and the inner tube after long-term use.

[0021] The present utility model is further configured such that the rotating seat is installed on the outer shell by means of snap connection.

[0022] By adopting the above technical solution, the connection structure is simple and reliable, and the disassembly and assembly are very convenient. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the whole of the present utility model;

[0024] Figure 2 is a cross-sectional view of the whole of the present utility model;

[0025] Figure 3 is an exploded view of the whole of the present utility model;

[0026] Figure 4 is a schematic structural diagram of the installation of the bearing of the present utility model;

[0027] Figure 5 is Figure 4 an enlarged structural diagram of part A in

[0028] In the figure: 1. outer shell; 2. rotating seat; 3. bearing; 4. inner tube; 5. positioning soft rib; 6. elastic structure; 7. elastic block; 8. deformation part; 9. stress part; 10. guiding inclined surface; 11. relief through hole; 12. reinforcing convex surface; 13. elastic barb. Specific embodiments

[0029] 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 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.

[0030] Embodiment: As shown in the attached Figures 1 - 5 installation structure of a knob switch bearing, including an outer shell 1, a rotating seat 2 and a bearing 3. An inner tube 4 is integrally provided on the outer shell 1. The rotating seat 2 is rotatably arranged on the outer periphery of the inner tube 4. The bearing 3 is arranged between the inner tube 4 and the rotating seat 2, and the inner ring of the bearing 3 is in interference fit with the inner tube 4, and the outer ring of the bearing 3 is in interference fit with the rotating seat 2; a plurality of positioning soft ribs 5 for abutting against the inner ring of the bearing 3 are uniformly distributed on the outer periphery of the inner tube 4, and multiple groups of elastic structures 6 are also provided at the radial matching position between the inner tube 4 and the inner ring of the bearing 3. By adding the elastic structure 6 at the radial matching position between the outer shell 1 and the bearing 3, although the positioning soft ribs 5 are squeezed and deformed after high temperature, a gap is generated between the outer shell 1 and the bearing 3 after returning to normal temperature, but since the elastic structure 6 always abuts against the inner ring of the bearing 3, that is, the elastic structure 6 can still ensure the wobbling amount of the bearing 3, thus ensuring a good product experience.

[0031] As shown in the attached Figure 4As shown in the figure, multiple groups of elastic structures 6 are distributed in a circumferential array on the outer periphery of the inner tube 4. The elastic structure 6 includes elastic blocks 7 provided on the inner tube 4 and capable of deforming radially along the inner tube 4 under force. The outer ends of the elastic blocks 7 protrude from the outer circular surface of the inner tube 4 and are in tight contact with the inner ring of the bearing 3. This design not only has uniform force, but also the elastic blocks 7 exert a reaction force on the bearing 3 after deformation, which can effectively tighten the bearing 3.

[0032] Among them, the elastic block 7 and the inner tube 4 are of an integral structure and are formed by injection molding. Its structure is simple and reliable, with high strength and convenient processing.

[0033] As shown in the attachment Figure 5 As shown in the figure, the elastic block 7 includes a deformation part 8 extending along the axial direction of the inner tube 4 and a force-receiving part 9 provided at the end of the deformation part 8 and extending towards the bearing 3. The force-receiving part 9 is in tight contact with the inner ring of the bearing 3. The force-receiving part 9 protrudes outwards, and when it is deformed by force, it can effectively generate a reaction force on the outer ring of the bearing 3 to tighten the bearing 3.

[0034] As shown in the attachment Figure 5 As shown in the figure, a guiding inclined surface 10 is provided at the upper end of the force-receiving part 9. The guiding inclined surface 10 at the upper end of the force-receiving part 9 plays a guiding role in the installation of the bearing 3, which is more conducive to the installation operation of the bearing 3.

[0035] As shown in the attachment Figure 5 As shown in the figure, a plurality of relief through holes 11 with the same number as the elastic blocks 7 are provided on the inner tube 4, and the elastic blocks 7 are arranged in the corresponding relief through holes 11. In addition, non-through relief grooves can also be provided. The relief through holes 11 play a role of making way, ensuring that the elastic blocks 7 can deform smoothly in the radial direction of the inner tube 4 without interference.

[0036] Among them, the height of the elastic block 7 is less than the height of the relief through hole 11. This design can form a relief gap between the top end of the elastic block 7 and the top end of the relief through hole 11, avoiding interference at the upper end when the elastic block 7 deforms.

[0037] As shown in the attachment Figure 4 As shown in the figure, a plurality of reinforcing convex surfaces 12 with the same number as the elastic blocks 7 are provided on the inner circular surface of the inner tube 4, and the elastic blocks 7 are arranged within the range surrounded by the corresponding reinforcing convex surfaces 12, that is, the thickness of the inner tube 4 at the position corresponding to the reinforcing convex surfaces 12 is larger. This design can increase the strength of the inner tube 4 at the position corresponding to the elastic blocks 7, avoiding tearing at the connection part between the elastic blocks 7 and the inner tube 4 after long-term use.

[0038] As shown in the attachment Figure 1As shown, the rotating base 2 is installed on the outer shell 1 by snap connection, that is, a plurality of elastic barbs 13 are integrally provided on the outer shell 1, and the plurality of elastic barbs 13 are fastened to the outer edge of the upper end of the rotating base 2, and the rotating base 2 is sleeved on the outer periphery of the inner tube 4, so as to lock the rotating base 2 on the outer shell 1. The connection structure is simple and reliable, and the disassembly and assembly are very convenient.

Claims

1. A mounting structure for a knob switch bearing, comprising a housing (1), a rotating seat (2) and a bearing (3), wherein the housing (1) is provided with an inner tube (4), the rotating seat (2) is rotatably arranged on the outer periphery of the inner tube (4), the bearing (3) is arranged between the inner tube (4) and the rotating seat (2), and the inner ring of the bearing (3) is interference fit with the inner tube (4), and the outer ring of the bearing (3) is interference fit with the rotating seat (2); characterized in that: The outer periphery of the inner tube (4) is provided with a plurality of positioning soft ribs (5) for tightly abutting against the inner ring of the bearing (3), and the radial matching position between the inner tube (4) and the inner ring of the bearing (3) is also provided with a plurality of sets of elastic structures (6).

2. The installation structure of a knob switch bearing according to claim 1, characterized in that: A plurality of groups of elastic structures (6) are distributed in a circular array on the outer circumference of the inner tube (4), the elastic structure (6) comprising an elastic block (7) which is arranged on the inner tube (4) and can deform radially along the inner tube (4) when subjected to force, the outer end of the elastic block (7) protruding from the outer circumferential surface of the inner tube (4) and tightly abutting against the inner ring of the bearing (3).

3. The installation structure of a knob switch bearing according to claim 2, characterized in that: The elastic block (7) and the inner tube (4) are an integrated structure.

4. The installation structure of a knob switch bearing according to claim 2, characterized in that: The elastic block (7) comprises a deformation portion (8) extending axially along the inner tube (4) and a force-bearing portion (9) arranged at the end of the deformation portion (8) and extending in a direction close to the bearing (3); the force-bearing portion (9) is tightly pressed against the inner ring of the bearing (3).

5. The installation structure of a knob switch bearing according to claim 4, characterized in that: The upper end of the force-bearing portion (9) is provided with a guiding inclined surface (10).

6. The installation structure of a knob switch bearing according to claim 4, characterized in that: The inner tube (4) is provided with a plurality of clearance through holes (11) whose number is equal to the number of the elastic blocks (7), and the elastic blocks (7) are arranged in the corresponding clearance through holes (11).

7. The installation structure of a knob switch bearing according to claim 6, characterized in that: The height of the elastic block (7) is smaller than the height of the clearance through hole (11).

8. The installation structure of a knob switch bearing according to claim 2, characterized in that: The inner circular surface of the inner tube (4) is provided with a plurality of reinforcing convex surfaces (12) whose number is equal to the number of the elastic blocks (7), and the elastic blocks (7) are arranged within the range surrounded by the corresponding reinforcing convex surfaces (12).

9. The installation structure of a knob switch bearing according to claim 2, characterized in that: The rotating seat (2) is mounted on the housing (1) by means of a snap connection.

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