Driving structure for adjusting car seat

Abstract

The application discloses a driving structure for adjusting an automobile seat and belongs to the technical field of automobile accessories, which comprises a mounting seat, a reduction gearbox and a lead screw, the inside of the reduction gearbox is provided with a driving block and a worm, the driving block comprises a worm wheel which is meshed and connected with the worm, the inner wall of the worm wheel is centrally provided with internal threads, the two sides of the worm wheel are fixedly connected with blocking rings, the outer wall of the reduction gearbox is provided with a lead screw hole through which the lead screw penetrates, the lead screw hole is coaxially arranged with the worm wheel, the lead screw is threadedly matched with the internal threads on the inner wall of the worm wheel by penetrating the lead screw hole, and the inner wall of the blocking ring is fixedly bonded with a sound-absorbing ring; the internal threads are centrally arranged in the middle area of the inner wall of the worm wheel, the meshing effect of the internal threads and the lead screw is concentrated in the central position, the vibration and noise generated by the two ends of the driving block due to friction are reduced, the blocking rings and the sound-absorbing ring are arranged to block and absorb the noise generated in the sliding process of the driving block, and the noise is reduced.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a drive structure for adjusting automotive seats. Background Technology

[0002] As automobiles are a widely used means of transportation, and as people's living standards improve, automobile manufacturers are also placing greater emphasis on comfort, especially in the area of ​​car seats. The drive structure of existing car seats usually consists of a lead screw and a drive block connected to the outer wall of the lead screw. The seat movement is achieved through the interaction between the slider and the lead screw.

[0003] The published patent document CN209654531U discloses a horizontal drive reduction gearbox for automotive seats. This patent reduces noise by setting a wear-resistant ring to reduce friction between the worm gear teeth and the inner wall of the reduction gearbox, and by setting a shim to separate the wheel body from the wear-resistant ring to prevent the end face of the wheel body from scratching the wear-resistant ring and causing wear. However, the inner wall of the worm gear still makes noise when it is in use due to the engagement with the lead screw thread. Therefore, an improvement is now made to the drive structure for adjusting automotive seats. Utility Model Content

[0004] In view of the shortcomings of the prior art, this application provides a drive structure for adjusting automobile seats, which overcomes the shortcomings of the prior art and aims to solve the problems in the prior art.

[0005] To achieve the above objectives, this application provides the following technical solution: a drive structure for adjusting an automotive seat, comprising a mounting base, a reduction gearbox, and a lead screw. The reduction gearbox contains a drive block and a worm gear. The drive block includes a worm wheel meshing with the worm gear. Internal threads are centrally arranged on the inner wall of the worm wheel. A retaining ring is fixedly connected to both sides of the worm wheel. A lead screw hole is provided on the outer wall of the reduction gearbox for the lead screw to pass through. The lead screw hole is coaxial with the worm wheel. The lead screw passes through the lead screw hole and engages with the internal threads on the inner wall of the worm wheel. A sound-absorbing ring is fixedly bonded to the inner wall of the retaining ring, and a gap is left between the inner wall of the sound-absorbing ring and the outer wall of the lead screw.

[0006] By adopting the above technical solution, the internal threads are concentrated in the middle area of ​​the inner wall of the worm gear, so that the meshing action between the internal threads and the lead screw is concentrated in the center position, reducing the vibration and noise generated by friction at both ends of the drive block. By setting blocking rings and sound-absorbing rings, the noise generated during the sliding process of the drive block is blocked and absorbed, thereby reducing noise.

[0007] As a preferred technical solution of this application, the outer wall of the blocking ring is fitted with a gasket that abuts against the end face of the worm gear teeth, and a wear-resistant ring is fitted on the outer wall of the blocking ring on the other side of the gasket. The wear-resistant ring is composed of a radial support ring and an axial support ring, and the outer wall of the axial support ring is symmetrically provided with protrusions.

[0008] By adopting the above technical solution, the worm gear and the wear ring are separated by a shim to avoid wear between them. The radial support ring of the wear ring is used to bear the radial force when the drive block rotates, and the axial support ring is used to bear the axial force generated when the drive block rotates and drives the seat forward and backward. This effectively disperses stress, reduces wear, and lowers noise.

[0009] As a preferred technical solution of this application, the inside of the gearbox is provided with grooves symmetrically opened on the outside of the lead screw hole, and the protrusions are adapted to the grooves.

[0010] By adopting the above technical solution, the wear-resistant ring is fixed inside the gearbox through the cooperation between the protrusion and the groove.

[0011] As a preferred technical solution of this application, the sound-absorbing ring is made of rubber material.

[0012] By adopting the above technical solution, rubber materials, due to their high density and good elasticity, can absorb the energy of sound waves, thereby reducing the propagation of noise.

[0013] As a preferred technical solution of this application, both ends of the gearbox are fitted with buffer sleeves, and the buffer sleeves are provided with through holes coaxial with the lead screw hole. The gearbox is fixedly installed inside the mounting base through the buffer sleeves.

[0014] By adopting the above technical solution, a buffer sleeve is set to create elastic contact between the gearbox and the mounting base, which can absorb impact and reduce operating noise.

[0015] As a preferred technical solution of this application, the gearbox is composed of a housing 1 and a housing 2, which are fixedly connected by assembly bolts. Both housing 1 and housing 2 are provided with mounting holes that are threadedly engaged with the assembly bolts.

[0016] By adopting the above technical solution, it is convenient to install or disassemble the gearbox, so that staff can inspect the parts inside the gearbox.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, by concentrating the internal threads in the middle area of ​​the inner wall of the worm gear, the meshing action of the internal threads and the lead screw is concentrated in the center position, reducing the vibration and noise generated by friction at both ends of the drive block. By setting a blocking ring and a sound-absorbing ring, the noise generated during the sliding process of the drive block is blocked and absorbed, thereby reducing noise.

[0019] 2. In this utility model, a shim is used to separate the worm gear and the wear ring to avoid wear between them. The radial support ring of the wear ring is used to bear the radial force when the drive block rotates, and the axial support ring is used to bear the axial force generated when the drive block rotates and drives the seat forward and backward. This effectively disperses stress, reduces wear, and lowers noise.

[0020] With reference to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereto. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

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

[0023] Figure 2 This is a schematic diagram of the split structure of this application;

[0024] Figure 3 This is a schematic diagram of the composition and structure of the gearbox in this application;

[0025] Figure 4 This is a front cross-sectional view of the driving block of this application.

[0026] In the diagram: 1. Mounting base; 2. Gearbox; 201. Housing 1; 202. Housing 2; 3. Buffer sleeve; 4. Drive block; 401. Worm gear; 402. Blocking ring; 403. Internal thread; 404. Sound-absorbing ring; 5. Worm; 6. Washer; 7. Wear ring; 701. Radial support ring; 702. Axial support ring; 703. Protrusion; 8. Lead screw hole; 9. Groove; 10. Mounting hole; 11. Assembly bolt; 12. Lead screw. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] like Figure 1 - Figure 4 As shown, this embodiment provides a drive structure for adjusting a car seat, including a mounting base 1, a reduction gearbox 2, and a lead screw 12. The reduction gearbox 2 contains a drive block 4 and a worm gear 5. The drive block 4 includes a worm wheel 401 meshing with the worm gear 5. The inner wall of the worm wheel 401 is provided with internal threads 403. Both sides of the worm wheel 401 are fixedly connected with retaining rings 402. The outer wall of the reduction gearbox 2 has a lead screw hole 8 for the lead screw 12 to pass through. The lead screw hole 8 is coaxially arranged with the worm wheel 401. The lead screw 12 passes through the lead screw hole 8 and meshes with the internal threads 403 on the inner wall of the worm wheel 401. The thread 403 is threaded, and the inner wall of the blocking ring 402 is fixedly bonded with a sound-absorbing ring 404. There is a gap between the inner wall of the sound-absorbing ring 404 and the outer wall of the lead screw 12. In use, by concentrating the internal thread 403 in the middle area of ​​the inner wall of the worm gear 401, the meshing action of the internal thread 403 and the lead screw 12 is concentrated in the center position, reducing the vibration and noise generated by friction at both ends of the drive block 4. By setting the blocking ring 402 and the sound-absorbing ring 404, the noise generated during the sliding process of the drive block 4 is blocked and absorbed, thereby reducing the noise.

[0029] In this embodiment, as Figure 3 As shown, a gasket 6 is fitted onto the outer wall of the blocking ring 402, abutting against the tooth end face of the worm gear 401. A wear-resistant ring 7 is fitted onto the outer wall of the blocking ring 402 on the other side of the gasket 6. The wear-resistant ring 7 consists of a radial support ring 701 and an axial support ring 702. The outer wall of the axial support ring 702 is symmetrically provided with protrusions 703. In use, the gasket 6 separates the worm gear 401 from the wear-resistant ring 7 to prevent wear between them. The radial support ring 701 of the wear-resistant ring 7 is used to bear the radial force when the drive block 4 rotates, and the axial support ring 702 is used to bear the axial force generated when the drive block 4 rotates and drives the seat forward and backward, so that the stress is effectively distributed, reducing wear and noise.

[0030] In this embodiment, as Figure 2 and 3 As shown, the inside of the gearbox 2 is symmetrically provided with grooves 9 on the outside of the lead screw hole 8. The protrusion 703 is adapted to the groove 9. In use, the wear-resistant ring 7 is fixed inside the gearbox 2 by the cooperation between the protrusion 703 and the groove 9.

[0031] In this embodiment, as Figure 4 As shown, the sound-absorbing ring 404 is made of rubber material. When in use, the rubber material, due to its high density and good elasticity, can absorb the energy of sound waves, thereby reducing the propagation of noise.

[0032] In this embodiment, as Figure 1 and 2As shown, buffer sleeves 3 are fitted on both ends of the gearbox 2. The buffer sleeves 3 have through holes coaxial with the lead screw hole 8. The gearbox 2 is fixedly installed inside the mounting base 1 by the buffer sleeves 3. In use, the buffer sleeves 3 make elastic contact between the gearbox 2 and the mounting base 1 to absorb impact and reduce working noise.

[0033] In this embodiment, as Figure 2 and 3 As shown, the gearbox 2 is assembled from a housing 1 201 and a housing 2 202. The housing 1 201 and the housing 2 202 are fixedly connected by assembly bolts 11. Both housing 1 201 and housing 2 202 are provided with mounting holes 10 that are threaded into the assembly bolts 11. During use, it is convenient to install or disassemble the gearbox 2 so that the staff can inspect the parts inside the gearbox 2.

[0034] The working principle of this utility model is as follows: When using the driving structure for adjusting a car seat according to this application, by arranging the internal thread 403 in the middle area of ​​the inner wall of the worm gear 401, the meshing action of the internal thread 403 and the lead screw 12 is concentrated in the center position, reducing the vibration and noise generated by friction at both ends of the drive block 4. By setting the blocking ring 402 and the sound-absorbing ring 404, the noise generated during the sliding process of the drive block 4 is blocked and absorbed, thereby reducing the noise.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A drive structure for adjusting an automobile seat, comprising a mounting base (1), a reduction gearbox (2), and a lead screw (12), characterized in that, The gearbox (2) is equipped with a drive block (4) and a worm (5). The drive block (4) includes a worm wheel (401) that meshes with the worm (5). The inner wall of the worm wheel (401) is provided with internal threads (403). Both sides of the worm wheel (401) are fixedly connected with blocking rings (402). The outer wall of the gearbox (2) is provided with a lead screw hole (8) for the lead screw (12) to pass through. The lead screw hole (8) is coaxially arranged with the worm wheel (401). The lead screw (12) passes through the lead screw hole (8) and is threadedly engaged with the internal threads (403) on the inner wall of the worm wheel (401). The inner wall of the blocking ring (402) is fixedly bonded with a sound-absorbing ring (404). There is a gap between the inner wall of the sound-absorbing ring (404) and the outer wall of the lead screw (12).

2. The driving structure for adjusting a car seat according to claim 1, characterized in that, The outer wall of the blocking ring (402) is fitted with a gasket (6) that abuts against the tooth end face of the worm gear (401). The outer wall of the blocking ring (402) is fitted with a wear-resistant ring (7) on the other side of the gasket (6). The wear-resistant ring (7) is composed of a radial support ring (701) and an axial support ring (702). The outer wall of the axial support ring (702) is symmetrically provided with protrusions (703).

3. The driving structure for adjusting a car seat according to claim 2, characterized in that, The gearbox (2) has grooves (9) symmetrically opened on the outside of the lead screw hole (8) inside, and the protrusion (703) is adapted to the groove (9).

4. The driving structure for adjusting a car seat according to claim 1, characterized in that, The sound-absorbing ring (404) is made of rubber material.

5. The driving structure for adjusting a car seat according to claim 1, characterized in that, Both ends of the gearbox (2) are fitted with buffer sleeves (3), and the buffer sleeves (3) have through holes coaxial with the lead screw hole (8). The gearbox (2) is fixedly installed inside the mounting base (1) through the buffer sleeves (3).

6. The driving structure for adjusting a car seat according to claim 1, characterized in that, The gearbox (2) is assembled from a housing one (201) and a housing two (202). The housing one (201) and the housing two (202) are fixedly connected by assembly bolts (11). The housing one (201) and the housing two (202) are provided with mounting holes (10) that are threadedly engaged with the assembly bolts (11).

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