Nut assembly, horizontal driver for car seat

Abstract

The utility model discloses a nut assembly, car seat horizontal driver, include: connecting piece has the accommodating part, nut is set up in the accommodating part, is used for with the screw rod thread connection, elastic support spare is set up between the bottom of accommodating part and nut, is used for providing elastic support to nut, elastic support spare has the first limit portion that extends to the nut direction, and the first limit portion cooperates with the side of nut to restrict the displacement of nut on the side, and elastic support spare has the second limit portion that extends to the connecting piece direction, and the second limit portion cooperates with the side of connecting piece, and connecting piece and nut are all provided with the through channel that the screw rod passes through along the axial direction of screw rod. Can provide elastic floating support to nut while restricting the displacement of nut on the side, improve the operation stability and reliability of nut assembly.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat adjustment technology, specifically to a nut assembly and an automotive seat leveling actuator. Background Technology

[0002] A car seat leveling actuator typically consists of a drive unit, a lead screw, and a nut assembly. The drive unit drives the lead screw to rotate, the nut assembly moves along the lead screw, and the nut assembly can be used to mount a slide rail or car seat, moving the car seat along with it during the movement of the nut.

[0003] A typical nut assembly includes a connector for mounting a car seat and a nut mounted on a lead screw. When the nut moves, it moves the connector, thereby driving the car seat. However, during the installation of a car seat, there are bound to be tolerances or positional deviations during operation. Therefore, it is also necessary to enable floating control between the nut and the connector.

[0004] Therefore, a nut assembly with better floating and support is needed. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a nut assembly and an automotive seat leveling drive that can provide elastic floating support for the nut while limiting the nut's lateral displacement, thereby improving the operational stability and reliability of the nut assembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a nut assembly, comprising: The connector has a receiving portion; A nut, provided within the receiving portion, is used for threaded connection with the lead screw; An elastic support member is disposed between the bottom of the receiving portion and the nut, for providing elastic support to the nut; The elastic support has a first limiting portion extending toward the nut, the first limiting portion engaging with the side of the nut to limit the nut's lateral displacement. The elastic support has a second limiting portion extending in the direction of the connector, and the second limiting portion cooperates with the side of the connector; Both the connector and the nut are provided with through channels along the axial direction of the lead screw for the lead screw to pass through.

[0007] As a further improvement of this utility model, it also includes: a buffer sleeve, which is sleeved on the nut, and the nut abuts against the inner wall of the receiving part through the buffer sleeve to limit the nut from swaying along the screw axial direction.

[0008] As a further improvement of this utility model, the buffer sleeve and the first limiting part of the elastic support member form an elastic abutment fit.

[0009] As a further improvement of this utility model, the buffer sleeve is provided with a V-shaped notch, which is used for the nut to be filled into the buffer sleeve.

[0010] As a further improvement of this utility model, the nut is provided with steps at both ends of the lead screw along the axial direction, and the buffer sleeve is provided with a through hole that matches the step at the position of the step. After the nut is installed into the buffer sleeve, the step is embedded in the through hole of the buffer sleeve.

[0011] As a further improvement of this utility model, the step is circular.

[0012] As a further improvement of this utility model, the buffer sleeve is made of rubber.

[0013] As a further improvement of this utility model, the connector is provided with a groove corresponding to the second limiting part of the elastic support member, and the groove is used to accommodate the second limiting part.

[0014] As a further improvement of this utility model, the bottom of the receiving portion of the connector is provided with a positioning groove, and the elastic support is provided with a positioning post corresponding to the position of the positioning groove. The positioning post is inserted into the positioning groove to restrict the movement of the elastic support relative to the connector.

[0015] Also provided is an automotive seat leveling drive, comprising: Nut assembly as described in any of the above; Drive unit; A lead screw is connected to the drive device, and the lead screw passes through the through channel and is threadedly connected to the nut of the nut assembly.

[0016] The beneficial effects of this utility model are as follows: by setting an elastic support member between the bottom of the receiving part of the connector and the nut, the nut is provided with elastic support, allowing it to float radially and compensate for manufacturing tolerances, assembly deviations, or deviations during operation. At the same time, the first limiting part of the elastic support member cooperates with the side of the nut to limit the nut's lateral displacement, and the second limiting part of the elastic support member cooperates with the side of the connector to limit the lateral displacement of the elastic support member itself relative to the connector. Thus, while achieving floating compensation, the lateral sway of the nut is effectively limited, improving the operational stability and reliability of the nut assembly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the nut assembly structure of this utility model; Figure 3 This is an explosion diagram of the nut assembly of this utility model. Figure 1 ; Figure 4 This is an explosion diagram of the nut assembly of this utility model. Figure 2 ; Figure 5 This is an explosion diagram of the nut assembly of this utility model. Figure 3 .

[0018] Reference numerals: 1. Connector; 11. Receiving part; 12. Groove; 13. Positioning groove; 2. Nut; 21. Buffer sleeve; 211. V-shaped notch; 22. Step; 3. Elastic support; 31. First limiting part; 32. Second limiting part; 33. Positioning post; 41. Drive device; 42. Lead screw. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0020] Reference Figure 1-5 As shown, a nut assembly according to this embodiment includes: Connector 1 has a receiving portion 11; Nut 2 is disposed in the receiving part 11 and is used for threaded connection with lead screw 42; The elastic support 3 is disposed between the bottom of the receiving part 11 and the nut 2, and is used to provide elastic support for the nut 2; The elastic support 3 has a first limiting part 31 extending in the direction of the nut 2. The first limiting part 31 cooperates with the side of the nut 2 to limit the nut 2's displacement in the lateral direction. The elastic support 3 has a second limiting part 32 extending in the direction of the connector 1, and the second limiting part 32 cooperates with the side of the connector 1. Both the connector 1 and the nut 2 are provided with through channels along the axial direction of the lead screw 42 for the lead screw 42 to pass through.

[0021] The elastic support 3 is disposed between the bottom of the receiving part 11 and the nut 2. After the lead screw 42 passes through the through channel and is threadedly connected to the nut 2, the rotation of the lead screw 42 drives the nut 2 to move axially along the lead screw 42. The elastic support 3 provides radial elastic support for the nut 2. When there are tolerances in the installation of the car seat or when positional deviation occurs during operation, the elastic support 3 compensates for the floating through its own elastic deformation, avoiding rigid jamming between the nut 2 and the connecting part 1. At the same time, the first limiting part 31 extending towards the nut 2 on the elastic support 3 cooperates with the side of the nut 2 to limit the position of the nut 2 from the side, preventing the nut 2 from having excessive lateral displacement; the second limiting part 32 extending towards the connecting part 1 cooperates with the side of the connecting part 1 to limit the lateral movement of the elastic support 3 relative to the connecting part 1, so that the position of the elastic support 3 remains stable. Through the bidirectional extension structure of the elastic support 3, a single part simultaneously realizes the two functions of radial elastic floating support and lateral limiting, which can solve the problem that the nut assembly in the prior art is difficult to balance floating compensation and lateral positioning stability.

[0022] To facilitate limiting the axial movement of nut 2 along lead screw 42, in one optional scheme, It also includes: a buffer sleeve 21, which is fitted onto the nut 2. The nut 2 abuts against the inner wall of the receiving part 11 through the buffer sleeve 21 to limit the nut 2 from swaying along the screw 42 axially.

[0023] The buffer sleeve 21 is fitted over the nut 2 to fill the gap between the nut 2 and the inner wall of the receiving part 11. The buffer sleeve 21 fits tightly against the inner wall of the receiving part 11, confining the nut 2 within the receiving part 11 and preventing the nut 2 from wobbling along the lead screw 42, thereby improving ride comfort and reducing wear or noise of parts.

[0024] Furthermore, the buffer sleeve 21 and the first limiting part 31 of the elastic support 3 form an elastic abutment fit.

[0025] The buffer sleeve 21 and the first limiting part 31 of the elastic support 3 form an elastic abutment fit, which establishes a connection between the radial elastic system and the axial elastic system through the elastic contact surface, so that the radial and axial buffering effects cooperate with each other, further improving the overall vibration reduction performance of the nut assembly.

[0026] To facilitate the assembly of nut 2, in one specific structure, buffer sleeve 21 is provided with a V-shaped notch 211, which is used for nut 2 to be filled into buffer sleeve 21.

[0027] The buffer sleeve 21 is provided with a V-shaped notch 211, which allows the nut 2 to be easily inserted into the buffer sleeve 21 during assembly, facilitating the assembly operation.

[0028] To ensure reliable positioning between the nut 2 and the buffer sleeve 21, further optimization can be achieved by selecting the following method: the nut 2 is provided with steps 22 at both ends of the screw 42 along the axial direction, and the buffer sleeve 21 is provided with through holes that match the steps 22 at the corresponding positions. After the nut 2 is inserted into the buffer sleeve 21, the steps 22 are embedded in the through holes of the buffer sleeve 21.

[0029] The steps 22 at both ends of the nut 2 are embedded in the through holes of the buffer sleeve 21. The fit between the steps 22 and the through holes forms an axial positioning structure, which enables the buffer sleeve 21 to remain in an effective working position.

[0030] In some options, step 22 is annular.

[0031] The step 22 adopts a circular ring structure, which is compatible with the shape of the nut 2 and is easy to manufacture. When the circular ring step 22 is engaged with the through hole of the buffer sleeve 21, the force is evenly distributed.

[0032] Furthermore, the buffer sleeve 21 is made of rubber.

[0033] The buffer sleeve 21 is made of rubber material. Rubber has good elastic recovery ability and wear resistance, which can effectively absorb vibration and impact.

[0034] To facilitate the positioning and assembly of the second limiting part 32, the connecting member 1 is provided with a groove 12 corresponding to the second limiting part 32 of the elastic support member 3. The groove 12 is used to accommodate the second limiting part 32.

[0035] The connector 1 has a groove 12 corresponding to the second limiting part 32 of the elastic support 3. The groove 12 provides a clear accommodating space for the second limiting part 32. This makes the surface of the connector 1 flatter and prevents the second limiting part 32 from protruding from the surface.

[0036] To ensure the precise fixation of the elastic support 3 in the connector 1, a positioning groove 13 is provided at the bottom of the receiving part 11 of the connector 1, and a positioning post 33 is provided on the elastic support 3 at the position corresponding to the positioning groove 13. The positioning post 33 is inserted into the positioning groove 13 to restrict the movement of the elastic support 3 relative to the connector 1.

[0037] The positioning post 33 of the elastic support 3 is inserted into the positioning groove 13 of the connector 1. Through the insertion and cooperation of the positioning post 33 and the positioning groove 13, the position of the elastic support 3 in the receiving part 11 of the connector 1 is precisely fixed, preventing the elastic support 3 from accumulating displacement during the floating operation. At the same time, it also makes the cooperation position of the first limiting part 31 and the second limiting part 32 more stable.

[0038] This embodiment also provides a car seat leveling actuator, including: Nut assembly of any of the above; Drive unit 41; The lead screw 42 is connected to the drive device 41 for transmission, and the lead screw 42 passes through the through channel and is threadedly connected to the nut 2 of the nut assembly.

[0039] The drive unit 41 includes a motor and a reduction gearbox, with the output shaft of the reduction gearbox being connected to the lead screw 42. The motor outputs power, which is reduced and amplified by the reduction gearbox before being transmitted to the lead screw 42, driving the lead screw 42 to rotate. The rotation of the lead screw 42 drives the nut assembly to move axially along the lead screw 42 via a threaded engagement, and the nut assembly drives the connected car seat to move back and forth along the slide rail.

[0040] In summary, the complete operating process of the nut assembly and car seat leveling actuator of this utility model is as follows: The motor output power of the drive device 41 is transmitted to the lead screw 42 after passing through the reduction gearbox, driving the lead screw 42 to rotate. The lead screw 42 passes through the through-channel of the connector 1 and the nut 2 and is threadedly connected to the nut 2. When the lead screw 42 rotates, it drives the nut 2 to move axially along the lead screw 42 through the threaded engagement. During the movement, the nut 2 drives the connector 1 and the car seat mounted on the connector 1 to move back and forth along the slide rail, thereby adjusting the horizontal position of the seat.

[0041] During movement, the elastic support 3 is located between the bottom of the receiving portion 11 of the connector 1 and the nut 2, providing radial elastic support for the nut 2. When the car seat has a radial deviation between the nut 2 and the lead screw 42 due to manufacturing tolerances or assembly deviations, the elastic support 3 provides floating compensation through its own elastic deformation, avoiding rigid jamming. The first limiting portion 31 of the elastic support 3 extends upward and engages with the side of the nut 2, limiting the lateral displacement of the nut 2; the second limiting portion 32 of the elastic support 3 extends downward and engages with the side of the connector 1, and is received and limited by the groove 12 on the connector 1, limiting the lateral movement of the elastic support 3 itself. The positioning post 33 at the bottom of the elastic support 3 is inserted into the positioning groove 13 of the connector 1 to prevent the elastic support 3 from accumulating displacement during floating operation.

[0042] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A nut assembly, characterized by include: The connector (1) has a receiving part (11); Nut (2) is provided in the receiving part (11) for threaded connection with lead screw (42); An elastic support member (3) is disposed between the bottom of the receiving part (11) and the nut (2) to provide elastic support for the nut (2); The elastic support (3) has a first limiting part (31) extending toward the nut (2), the first limiting part (31) cooperating with the side of the nut (2) to limit the displacement of the nut (2) in the lateral direction; The elastic support (3) has a second limiting part (32) extending in the direction of the connector (1), and the second limiting part (32) cooperates with the side of the connector (1); Both the connector (1) and the nut (2) are provided with through channels along the axial direction of the lead screw (42) for the lead screw (42) to pass through.

2. The nut assembly according to claim 1, characterized in that, Also includes: A buffer sleeve (21) is fitted onto the nut (2), and the nut (2) abuts against the inner wall of the receiving part (11) through the buffer sleeve (21) to restrict the nut (2) from swaying axially along the screw (42).

3. The nut assembly of claim 2, wherein, The buffer sleeve (21) and the first limiting part (31) of the elastic support (3) form an elastic abutment fit.

4. The nut assembly according to claim 2, characterized in that, The buffer sleeve (21) is provided with a V-shaped notch (211), which is used for the nut (2) to be filled into the buffer sleeve (21).

5. The nut assembly according to claim 2, characterized in that, The nut (2) has steps (22) at both ends of the lead screw (42) in the axial direction. The buffer sleeve (21) has a through hole that matches the step (22) at the position of the step (22). After the nut (2) is inserted into the buffer sleeve (21), the step (22) is embedded in the through hole of the buffer sleeve (21).

6. The nut assembly of claim 5, wherein, The step (22) is circular.

7. The nut assembly of claim 2, wherein, The buffer sleeve (21) is made of rubber.

8. The nut assembly of claim 1, wherein, The connector (1) is provided with a groove (12) corresponding to the second limiting part (32) of the elastic support (3), and the groove (12) is used to accommodate the second limiting part (32).

9. The nut assembly of claim 1, wherein, The bottom of the receiving part (11) of the connector (1) is provided with a positioning groove (13), and the elastic support (3) is provided with a positioning post (33) corresponding to the position of the positioning groove (13). The positioning post (33) is inserted into the positioning groove (13) to restrict the movement of the elastic support (3) relative to the connector (1).

10. An automotive seat horizontal drive characterized by comprising: include: The nut assembly as described in any one of claims 1 to 9; Drive unit (41); The lead screw (42) is connected to the drive device (41) and passes through the through channel to be threadedly connected to the nut (2) of the nut assembly.

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