CN219133926U

CN219133926U - Folding mechanism for backrest of automobile seat

Info

Publication number: CN219133926U
Application number: CN202320244161.XU
Authority: CN
Inventors: 盖俊峰
Original assignee: Chongqing Lifu Technology Co ltd
Current assignee: Chongqing Lifu Technology Co ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-06-06
Anticipated expiration: 2033-02-17

Abstract

The utility model relates to the technical field of automobile seats, in particular to a folding mechanism of a backrest of an automobile seat, which comprises a seat, wherein a rotating shaft is arranged on the seat, a first traction rod is connected to the rotating shaft, a backrest is fixedly connected to the first traction rod, a sliding groove is formed in the seat, a sliding block is arranged in the sliding groove, a second traction rod is connected between the sliding block and the backrest, the sliding block rotates through a rotating turntable, the turntable drives a worm wheel to rotate through a worm, the worm wheel drives a nut to horizontally move through a ball screw, the nut drives the second traction rod to deflect downwards through the sliding block, the second traction rod drives the backrest to deflect downwards, so that folding work of the backrest is completed, the inner space of the automobile is increased, riding comfort of passengers is improved, the worm wheel cannot drive the worm to rotate due to self-locking characteristics of the worm and the worm wheel, and the stability of a driving mechanism is improved because the second traction rod drives the sliding block to rotate due to gravity of the backrest.

Description

Folding mechanism for backrest of automobile seat

Technical Field

The utility model relates to the technical field of automobiles, in particular to a folding mechanism of a backrest of an automobile seat.

Background

The automobile seat can be divided into a split seat and a long seat according to the shape; the functions can be divided into fixed type, detachable type and adjustable type; the number of people can be divided into single, double and multi-person chairs according to the use performance of the chair, and the chair is developed from the earliest fixed chair to a multifunctional power adjusting chair, such as an air cushion chair, an electric chair, a stereo chair and a mental restoration chair, and the chair is electrically adjusted.

An automobile seat (1) proposed by chinese publication No. CN110077352B has a seat back (3) with a base frame (6) and a head frame (7), wherein the base frame is connected to a seat portion (2), and the head frame is supported on the base frame in a tilt-adjustable manner by a swivel hinge (8) provided on each seat side, and an airbag module (10) is incorporated in the seat back. The object of the utility model is to improve such a motor vehicle seat. The object is achieved by the airbag module being connected to a carrier (11) which, together with the airbag module, bridges a collision point (12) which is formed by the articulated connection of the head frame to the base frame, wherein the carrier is connected to the base frame in a rotationally articulated manner at one end region thereof and to the head frame in a rotationally articulated manner and axially movable manner at the other end region thereof, such that the airbag module together with the carrier is brought about by the tilting of the head frame. In the above technical scheme, the automobile seat cannot be folded, and some articles are required to be placed in the automobile in real life, but because the automobile space is limited, the articles are piled up in the automobile, and the riding comfort of passengers is negatively affected.

Disclosure of Invention

The utility model aims to solve the problem that the automobile seat cannot be folded in the technical scheme in the prior art, and provides an automobile seat backrest folding mechanism.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the folding mechanism of the backrest of the automobile seat comprises a seat, wherein a rotating shaft is arranged on the seat, a first traction rod is connected to the rotating shaft, the backrest is fixedly connected to the first traction rod, a sliding groove is formed in the seat, a sliding block is arranged in the sliding groove, and a second traction rod is connected between the sliding block and the backrest;

the seat is provided with a driving mechanism for driving the sliding block to horizontally move.

Preferably, the free end pin shaft of the first traction rod is connected to the rotating shaft, and the sliding groove is horizontally arranged at the side end position of the seat.

Preferably, the sliding block is horizontally sleeved in the sliding groove in a sliding manner, and two ends of the second traction rod are respectively connected to the sliding block and the backrest through pin shafts.

Preferably, the driving mechanism comprises a first mounting block and a second mounting block which are fixedly mounted at the side end of the seat, a worm is arranged in the first mounting block, a turntable is fixedly arranged at one end of the worm extending out of the first mounting block, the first mounting block horizontally rotates through a bearing to be provided with a ball screw, a worm wheel which is engaged with the worm is fixedly sleeved on the ball screw, and a nut fixedly connected with the sliding block is sleeved on the ball screw in a matched mode.

Preferably, the first mounting block is of a hollow structure, and the worm is rotatably mounted in the first mounting block through a bearing.

Preferably, the ball screw is horizontally rotatably mounted on the second mounting block through a bearing, and the worm gear is disposed in the second mounting block.

Compared with the prior art, the utility model has the following advantages:

1. according to the utility model, the turntable rotates through rotating the turntable, the worm wheel is driven by the turntable to rotate through the worm, the nut is driven by the worm wheel to horizontally move through the ball screw, the nut drives the second traction rod to downwards deflect through the sliding block, and the second traction rod drives the backrest to downwards deflect, so that the folding work of the backrest is completed, the internal space of the automobile is increased, and the riding comfort of passengers is improved.

2. According to the utility model, through the self-locking characteristic of the worm and the worm wheel, the worm wheel can not drive the worm to rotate, so that the rotation of the ball screw caused by the fact that the second traction rod pushes the sliding block due to the gravity of the backrest is avoided, and the stability of the driving mechanism is improved.

Drawings

FIG. 1 is a schematic view of a folding mechanism for a seat back of an automobile according to the present utility model;

FIG. 2 is a schematic view of a partially enlarged structure of a folding mechanism of a backrest of a vehicle seat according to the present utility model;

fig. 3 is a schematic diagram of a connection structure of a seat, a chute, a slider, a second mounting block, a ball screw and a nut of the folding mechanism of the backrest of the automobile seat.

In the figure: 1. a seat; 2. a rotating shaft; 3. a first drawbar; 4. a backrest; 5. a chute; 6. a slide block; 7. a second drawbar; 8. a first mounting block; 9. a second mounting block; 10. a worm; 11. a turntable; 12. a ball screw; 13. a worm wheel; 14. and (3) a nut.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-3, a folding mechanism of a backrest of an automobile seat comprises a seat 1, wherein a rotating shaft 2 is arranged on the seat 1, a first traction rod 3 is connected to the rotating shaft 2 through a pin shaft, a backrest 4 is fixedly connected to the first traction rod 3, a sliding groove 5 is horizontally arranged at the side end position of the seat 1, a sliding block 6 is horizontally sleeved in the sliding groove 5 in a sliding manner, the sliding block 6 can only horizontally move in the sliding groove 5 through the guiding and limiting function of the sliding groove 5, and a second traction rod 7 is connected between the sliding block 6 and the backrest 4 through a pin shaft;

the seat 1 is provided with a driving mechanism for driving the sliding block 6 to horizontally move, the sliding block 6 is driven by the driving mechanism to horizontally shift, and the backrest 4 can downwards deflect under the traction action of the second traction rod 7, so that the internal space of the automobile is increased, and the riding comfort of passengers is improved;

further description: the driving mechanism comprises a first mounting block 8 and a second mounting block 9 which are fixedly mounted at the side end of the seat 1, the first mounting block 8 is of a hollow structure, a worm 10 is arranged in the first mounting block 8, the worm 10 is rotatably mounted in the first mounting block 8 through a bearing, and a turntable 11 is fixedly arranged at one end of the worm 10 extending out of the first mounting block 8;

the first installation block 8 is horizontally rotatably provided with the ball screw 12 through a bearing, the ball screw 12 is horizontally rotatably installed on the second installation block 9 through a bearing, the worm wheel 13 which is meshed with the worm 10 is fixedly sleeved on the ball screw 12, the worm wheel 13 is arranged in the second installation block 9, the worm wheel 13 can not drive the worm 10 to rotate through the self-locking effect of the worm 10 and the worm wheel 13, and the situation that the sliding block 6 horizontally moves to cause the ball screw 12 to rotate due to the fact that the second traction rod 7 is driven by the gravity of the backrest 4 to deflect is avoided, so that the stability of a driving mechanism is improved;

the ball screw 12 is sleeved with a nut 14 fixedly connected with the sliding block 6, and the gravity generated by the backrest 4 cannot be directly applied to the nut 14 through the connection of the nut 14 and the sliding block 6, so that the load of the nut 14 and the ball screw 12 can be relieved.

The utility model can explain its functional principle by the following modes of operation:

the rotating disc 11 rotates, the rotating disc 11 drives the worm 10 to rotate, the worm 10 drives the worm wheel 13 to rotate, the worm wheel 13 drives the ball screw 12 to rotate, the ball screw 12 drives the nut 14 to horizontally move, the nut 14 drives the sliding block 6 to horizontally move in the sliding groove 5, the sliding block 6 drives the second traction rod 7 to downwards deflect, and the second traction rod 7 drives the backrest 4 to downwards deflect, so that the backrest 4 is folded.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The automobile seat backrest folding mechanism comprises a seat (1) and is characterized in that a rotating shaft (2) is arranged on the seat (1), a first traction rod (3) is connected to the rotating shaft (2), a backrest (4) is fixedly connected to the first traction rod (3), a sliding groove (5) is formed in the seat (1), a sliding block (6) is arranged in the sliding groove (5), and a second traction rod (7) is connected between the sliding block (6) and the backrest (4);

the seat (1) is provided with a driving mechanism for driving the sliding block (6) to horizontally move.

2. The folding mechanism of the backrest of the automobile seat according to claim 1, wherein the free end pin of the first traction rod (3) is connected to the rotating shaft (2), and the sliding groove (5) is horizontally arranged at the side end position of the seat (1).

3. The folding mechanism of the backrest of the automobile seat according to claim 2, wherein the sliding block (6) is horizontally sleeved in the sliding groove (5) in a sliding manner, and two ends of the second traction rod (7) are respectively connected to the sliding block (6) and the backrest (4) through pin shafts.

4. The folding mechanism of the backrest of the automobile seat according to claim 1, wherein the driving mechanism comprises a first mounting block (8) and a second mounting block (9) which are fixedly mounted at the side end of the seat (1), a worm (10) is arranged in the first mounting block (8), one end of the worm (10) extending out of the first mounting block (8) is fixedly provided with a rotary table (11), the first mounting block (8) is horizontally rotatably provided with a ball screw (12) through a bearing, a worm wheel (13) which is in meshed connection with the worm (10) is fixedly sleeved on the ball screw (12), and a nut (14) which is fixedly connected with the sliding block (6) is sleeved on the ball screw (12) in a matching way.

5. The folding mechanism of a car seat back according to claim 4, characterized in that the first mounting block (8) is of hollow structure, and the worm (10) is rotatably mounted in the first mounting block (8) by means of a bearing.

6. The folding mechanism of a car seat back according to claim 4, characterized in that the ball screw (12) is mounted on the second mounting block (9) by bearing horizontal rotation, and the worm wheel (13) is provided in the second mounting block (9).