Seat linear running mechanism

Abstract

The utility model relates to a seat linear running mechanism which comprises a lead screw assembly, a driving assembly and a rolling structure, the lead screw assembly is fixedly installed on a fixed framework and comprises a gear box, the driving assembly comprises a gear box shell and a connecting support, the connecting support is fixedly connected to a movable framework, the gear box shell is fixed to the connecting support, and the rolling structure is arranged on the connecting support. The gear box is arranged in the gear box shell so as to achieve connection between the lead screw assembly and the connecting support through the gear box shell, the driving assembly is connected with the lead screw assembly so as to drive the movable framework to linearly move relative to the fixed framework, and the rolling structures are arranged at the two ends of the movable framework and comprise rolling wheels and sliding grooves which are matched with each other; the rolling wheels are rotatably installed on the movable framework, and the sliding grooves are fixedly installed on the fixed framework. According to the seat linear running mechanism, the requirement for front-back adjustment of a short-stroke seat can be met, and meanwhile the assembling and maintaining problems of a traditional sliding rail in short-stroke application are solved.

Description

Technical Field

[0001] This utility model relates to vehicle seats, and more specifically to a seat linear travel mechanism. Background Technology

[0002] Seats typically use slide rails as the linear movement mechanism for the front and rear seats, with a typical minimum travel of 140mm. For seats with less than this travel requirement, due to manufacturing limitations, it's impossible to install front and rear lead screw supports, and the short travel also prevents the oil filling hole from being exposed, making lead screw lubrication impossible. Therefore, for seats with a front-to-back travel of less than 140mm, such as projects requiring less than or equal to 100mm, conventional slide rails cannot meet the requirements, necessitating the design of a new structure to enable the seat's front-to-back movement. Utility Model Content

[0003] To address the issues of conventional slide rails in the prior art being unable to meet short-stroke requirements, this utility model provides a seat linear running mechanism.

[0004] According to the present invention, a linear motion mechanism for a seat includes a lead screw assembly, a drive assembly, and a rolling structure. The lead screw assembly is fixedly mounted on a fixed frame and includes a gearbox. The drive assembly includes a gearbox housing and a connecting bracket. The connecting bracket is fixedly connected to a movable frame. The gearbox housing is fixed to the connecting bracket. The gearbox is disposed inside the gearbox housing to achieve the connection between the lead screw assembly and the connecting bracket through the gearbox housing. The drive assembly is connected to the lead screw assembly to drive the movable frame to move linearly relative to the fixed frame. The rolling structure is disposed at both ends of the movable frame and includes mating rollers and a sliding groove. The rollers are rotatably mounted on the movable frame, and the sliding groove is fixedly mounted on the fixed frame.

[0005] In a preferred embodiment, the seat linear motion mechanism further includes a sliding component disposed adjacent to the lead screw assembly, which includes a cooperating slider and a track, the slider being fixedly mounted on the movable frame and the track being fixedly mounted on the fixed frame.

[0006] In a preferred embodiment, the seat linear motion mechanism includes two lead screw assemblies spaced apart from each other in the Y direction.

[0007] In a preferred embodiment, the lead screw assembly further includes a lead screw bracket and a lead screw, wherein the lead screw bracket is fixedly mounted on a sheet metal part of a fixed frame, and the lead screw is rotatably mounted on the lead screw bracket and passes through a meshing gearbox.

[0008] In a preferred embodiment, the drive assembly further includes a power source and a drive shaft, wherein the power source is connected to the gearbox via the drive shaft.

[0009] In a preferred embodiment, the power source is a motor.

[0010] In a preferred embodiment, the drive shaft is a flexible shaft disposed in the sleeve.

[0011] In a preferred embodiment, the drive assembly further includes a motor bracket, with the power source fixedly installed in the middle of the motor bracket, and both ends of the motor bracket fixedly connected to the connecting bracket and the gearbox housing.

[0012] In a preferred embodiment, the two sides of the gearbox are mounted in the gearbox housing via rubber components.

[0013] The linear motion mechanism for seats according to this utility model can adapt to the needs of short-stroke seat front and rear adjustment, while solving the assembly and maintenance problems of traditional slide rails in short-stroke applications. Attached Figure Description

[0014] Figure 1 This illustration shows an application scenario of a seat linear running mechanism according to a preferred embodiment of the present invention.

[0015] Figure 2 yes Figure 1 Exploded view of the linear motion mechanism of the seat.

[0016] Figure 3 yes Figure 1 A magnified view of a portion of the image.

[0017] Figure 4 Corresponding to Figure 3 Another preferred embodiment according to the present invention is shown. Detailed Implementation

[0018] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0019] like Figure 1 As shown, according to a preferred embodiment of the present invention, a seat linear motion mechanism A is disposed between a movable frame B and a fixed frame C to drive the movable frame B to move linearly relative to the fixed frame C. In this embodiment, the movable frame B is the seat frame of the third-row seat, and the fixed frame C is fixedly installed on the vehicle floor. The seat linear motion mechanism A is used to realize short-stroke fore-and-aft adjustment of the seat frame (less than 140mm), particularly in application scenarios where conventional seat rails cannot be arranged. It should be understood that the third-row seat mentioned here is only an example and not a limitation.

[0020] like Figure 2 and Figure 3As shown, the seat linear motion mechanism A includes two lead screw assemblies 1 and one drive assembly 2. The two lead screw assemblies 1, spaced apart in the Y-direction (left-right direction), are fixedly mounted on the fixed frame C. The drive assembly 2 is fixedly mounted on the movable frame B. The drive assembly 2 is connected to the lead screw assemblies 1 to drive the linear movement of the movable frame B relative to the fixed frame C. It should be understood that the two lead screw assemblies 1 here are merely examples and not limitations, applicable to applications requiring good stability. A single lead screw assembly 1 is also suitable, such as... Figure 4 As shown, it is applicable to application scenarios that require saving space and / or reducing costs.

[0021] Back Figure 2 The lead screw assembly 1 includes a lead screw bracket 11, a lead screw 12, and a gearbox 13. The lead screw bracket 11 is fixedly mounted on a sheet metal part of a fixed frame C, and the lead screw 12 is rotatably mounted on the lead screw bracket 11 and passes through the meshing gearbox 13. In this embodiment, the lead screw bracket 11 includes two lead screw nut blocks spaced apart from each other in the X direction (front-back direction), and both ends of the lead screw 12 are respectively inserted into the lead screw nut blocks for meshing.

[0022] like Figure 2 As shown, the drive assembly 2 includes a drive bracket 21, a power source 22, and a drive shaft 23. The drive bracket 21 is fixedly mounted on the movable frame B, and the power source 22 is fixedly mounted on the drive bracket 21 and connected to the gearbox 13 via the drive shaft 23. Thus, the power source 22 drives the gearbox 13 to move back and forth along the lead screw 12. In this embodiment, the power source 22 is a motor, and the drive shaft 23 is a flexible shaft housed in a sleeve. The motor drives the gears inside the gearbox to rotate via the flexible shaft, thereby achieving linear motion of the gearbox 13 on the lead screw 12, enabling the movable frame B to move back and forth.

[0023] In this embodiment, the drive bracket 21 includes a connecting bracket 211 (see...) Figure 3 The system comprises a gearbox housing 212 and a motor bracket 213. A connecting bracket 211 is fixedly connected to the movable frame B. The gearbox housing 212 is fixed to the connecting bracket 211 by fasteners (e.g., bolts). The gearbox 13 of the lead screw assembly 1 is disposed inside the gearbox housing 212 to achieve the connection between the lead screw assembly 1 and the connecting bracket 211. A power source 22 is fixedly installed in the middle of the motor bracket 213. Both ends of the motor bracket 213 are fixedly connected to the connecting bracket 211 and the gearbox housing 212 by fasteners (e.g., bolts). The gearbox housing 212 has multiple holes for the lead screw 12, drive shaft 23, and fasteners to pass through and be installed. It should be understood that the lead screw assembly 1 is a core component of the modular platform. This invention achieves the drive of the movable frame B relative to the fixed frame C by adding a gearbox housing 212, which is easier to stamp.

[0024] In this embodiment, the two sides of the gearbox 13 are disposed in the gearbox housing 212 by rubber parts 14.

[0025] like Figure 2 and Figure 3 As shown, the seat linear running mechanism A also includes two rolling structures 3, which are spaced apart at both ends of the movable frame B in the Y direction. Specifically, the rolling mechanism 3 includes a roller 31 and a slide 32, wherein the roller 31 is rotatably mounted on the movable frame B, and the slide 32 is fixedly mounted on the fixed frame C. The roller 31 and the slide 32 cooperate to bear the Z-direction (vertical) force.

[0026] like Figure 2 and Figure 3 As shown, the linear motion mechanism A of the seat also includes a sliding component 4, which is disposed adjacent to the lead screw assembly 1. Specifically, the sliding component 4 includes a slider 41 and a track 42, wherein the slider 41 is fixedly mounted on the movable frame B, and the track 42 is fixedly mounted on the fixed frame C. The slider 41 and the track 42 cooperate to share the load-bearing force in the Z direction and improve the clearance in the Y direction. In this embodiment, the sliding component 4 is a short groove structure, and its X-direction length is less than the X-direction length of the lead screw assembly 1.

[0027] Thus, the linear running mechanism of the seat according to this utility model eliminates the traditional upper and lower rails, making it suitable for short-stroke seat fore-and-aft adjustment, achieving space saving, cost reduction and lightweight design, and improving the convenience of seat fore-and-aft adjustment.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various variations can be made to the above embodiments of this utility model. That is, all simple and equivalent changes and modifications made based on the claims and description of this utility model application fall within the protection scope of the claims of this utility model patent. Any aspects of this utility model not described in detail are conventional technical content.

Claims

1. A seat linear travel mechanism, characterized in that, The linear motion mechanism of the seat includes a lead screw assembly, a drive assembly, and a rolling structure. The lead screw assembly is fixedly mounted on a fixed frame and includes a gearbox. The drive assembly includes a gearbox housing and a connecting bracket. The connecting bracket is fixedly connected to a movable frame. The gearbox housing is fixed to the connecting bracket. The gearbox is disposed inside the gearbox housing to achieve the connection between the lead screw assembly and the connecting bracket through the gearbox housing. The drive assembly is connected to the lead screw assembly to drive the movable frame to move linearly relative to the fixed frame. The rolling structure is disposed at both ends of the movable frame and includes mating rollers and sliding grooves. The rollers are rotatably mounted on the movable frame, and the sliding grooves are fixedly mounted on the fixed frame.

2. The seat linear travel mechanism according to claim 1, characterized in that, The linear motion mechanism of the seat also includes a sliding component located adjacent to the lead screw assembly, which includes a cooperating slider and a track. The slider is fixedly mounted on the movable frame, and the track is fixedly mounted on the fixed frame.

3. The seat linear travel mechanism according to claim 2, characterized in that, The seat linear operating mechanism includes two lead screw assemblies spaced apart from each other in the Y direction.

4. The seat linear travel mechanism according to claim 1, characterized in that, The lead screw assembly also includes a lead screw bracket and a lead screw, wherein the lead screw bracket is fixedly mounted on a sheet metal part of a fixed frame, and the lead screw is rotatably mounted on the lead screw bracket and passes through a meshing gearbox.

5. The seat linear travel mechanism according to claim 1, characterized in that, The drive assembly also includes a power source and a drive shaft, wherein the power source is connected to the gearbox via the drive shaft.

6. The seat linear travel mechanism according to claim 5, characterized in that, The power source is a motor.

7. The seat linear travel mechanism according to claim 5, characterized in that, The drive shaft is a flexible shaft installed in the sleeve.

8. The seat linear travel mechanism according to claim 5, characterized in that, The drive assembly also includes a motor bracket, with the power source fixedly mounted in the middle of the motor bracket, and both ends of the motor bracket fixedly connected to the connecting bracket and the gearbox housing.

9. The seat linear travel mechanism according to claim 1, characterized in that, The gearbox is mounted on both sides of the gearbox housing via rubber components.

Images