Angle adjuster based on rolling element circumferential wedge extrusion transmission

Abstract

The present invention provides a recliner based on the circumferential wedge extrusion transmission of rolling elements, including an inner ring, an outer ring, a rolling element and an eccentric wheel assembly, wherein when the eccentric wheel assembly is stationary, the inner ring is squeezed toward the outer ring in the direction of the eccentric force, the first arc groove transmits torque to the second arc groove through the rolling element and achieves meshing, when the eccentric wheel assembly rotates, the inner ring is driven to rotate, the rolling element rotates relative to the first arc groove and the second arc groove, so that the inner ring and the outer ring rotate relative to each other. The recliner in the present invention uses rollers or balls as carriers instead of teeth for meshing to achieve transmission and locking, avoiding the strength weakness of gear transmission, achieving a small-sized and high-strength electric recliner, reducing the material requirements for parts, and lowering the threshold of seat recliner production technology.

Description

Technical Field

[0001] The invention relates to the field of angle adjusters, and in particular to an angle adjuster based on rolling body circumferential wedge extrusion transmission. Background Art

[0002] With the continuous improvement of people's living standards and road traffic conditions, cars have become an indispensable means of transportation for many families. While enjoying the convenience and speed brought by cars, people have put forward higher requirements for the safety and comfort of cars. As a safety part of car seats, the quality of the recliner is not only related to the comfort of passengers, but also directly related to the personal safety of passengers.

[0003] The prior art angle adjuster forms the speed ratio of the inner and outer gear rings through gear meshing, when the number of outer teeth is greater than that of the inner and outer gears. The prior art angle adjuster has the following defects: 1. Since the gear meshing realizes transmission through a cantilever-like rod, this design has high requirements on the strength, processing accuracy and heat treatment of the material. The number of teeth of the prior art angle adjuster ranges from 35 to 41, and the tooth width is about 2.5mm. It has to withstand the load impact of 2000Nm to 4000Nm. Domestic spare parts manufacturers generally cannot meet this requirement; 2. In order to ensure mechanical strength, the installation size of the prior art angle adjuster is large, and the diameter of the gear ring ranges from 90mm to 81mm, resulting in a large size of the connected steel plate bracket, especially the rear seats, which need to withstand greater impact and higher strength requirements for the angle adjuster, so the angle adjuster is larger in size; 3. Due to the high requirements for materials and processing, the size is large and the cost is also very high; 4. The gear meshing structure will also cause noise and jitter problems during transmission. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide a recliner based on circumferential wedge-shaped extrusion transmission of rolling elements.

[0005] In a first aspect, the present invention provides a recliner based on rolling element circumferential wedge extrusion transmission, comprising:

[0006] An inner ring, wherein a plurality of first arc-shaped grooves are provided on the outer side of the inner ring;

[0007] An outer ring, wherein a plurality of second arc-shaped grooves are provided on the inner side of the outer ring, and the number of the second arc-shaped grooves is greater than the number of the first arc-shaped grooves;

[0008] A rolling body, wherein the rolling body is arranged in an accommodation space formed by the first arc groove and the second arc groove;

[0009] An eccentric wheel assembly is provided between the inner ring and the outer ring, wherein:

[0010] When the eccentric wheel assembly is stationary, the inner ring is pressed toward the outer ring in the direction of the eccentric force, and the first arc groove transmits torque to the second arc groove through the rolling element, so that the inner ring and the outer ring are meshed and adaptively adjusted.

[0011] When the eccentric wheel assembly rotates, the inner ring is driven to rotate, and the rolling body rotates relative to the first arc groove and the second arc groove, so that the inner ring and the outer ring rotate relatively.

[0012] Optionally, the rolling body is a cylindrical first roller, and the angle adjuster includes a first roller restraining ring.

[0013] A groove is provided in the circumferential middle portion of the first roller, and the first roller restraining ring is embedded in the groove to rotatably restrict the first roller to the outer side of the inner ring.

[0014] Optionally, the rolling body is a cylindrical second roller, and the angle adjuster includes a second roller restraining ring and a positioning ring.

[0015] The second roller is hollow in the axial direction, a positioning rod is provided on the side of the second roller restraining ring, the positioning ring is provided with a positioning hole, the positioning rod passes through the second roller and is connected to the positioning hole of the positioning ring, so that the second roller is rotatably limited to the outside of the inner ring.

[0016] Optionally, the rolling body is a spherical ball, and the angle adjuster includes a ball restraining ring.

[0017] The restraining ring is provided with a circular hole, and the ball is embedded in the circular hole and is confined to the outer side of the inner ring.

[0018] Optionally, the eccentric wheel assembly includes: a driving eccentric wheel, an eccentric wheel slider, and a spring.

[0019] A driving eccentric wheel, comprising a first end having a radius adapted to the inner diameter of the inner ring, and a second end having a radius adapted to the inner diameter of the outer ring, wherein the driving eccentric wheel is disposed through the inner ring and the outer ring;

[0020] The eccentric wheel slider comprises a semicircular arc slider divided into two and arranged on the semi-axial surface of the driving eccentric wheel.

[0021] A force-bearing support rod is provided at the end of the spring, and a spring fixing groove is provided at the adjacent end of the slider. The force-bearing support rod is inserted into the spring fixing groove, and the spring presses the slider toward the inner ring through the force-bearing support rod.

[0022] Furthermore, the eccentric wheel assembly includes a stop ring, and the second end of the driving eccentric wheel is provided with a stop ring installation groove. The stop ring is clamped with the second end of the driving eccentric wheel through the stop ring installation groove to axially fix the inner ring and the outer ring.

[0023] Furthermore, a spring installation groove is provided at the first end of the driving eccentric wheel, and the spring is embedded in the spring installation groove.

[0024] Furthermore, the driving eccentric wheel comprises a semicircular stopper, and the stopper and the second end of the driving eccentric wheel form a semi-axial surface for setting the eccentric wheel slider.

[0025] Furthermore, the eccentric wheel slider is a wedge-shaped slider, and the thickness of the wedge-shaped slider on one side close to the positioning support rod is greater than the thickness on the other side.

[0026] Optionally, the angle adjuster includes a cover plate, which is fixedly connected to the outer ring and confines the rolling element and the inner ring within the outer ring.

[0027] In a second aspect, the present invention provides a car seat, comprising any of the above-mentioned angle adjusters based on rolling body circumferential wedge extrusion transmission, and further comprising:

[0028] A cushion side plate, wherein the outer ring is fixedly connected to the cushion side plate of the seat;

[0029] Backrest side plate, the inner ring is fixedly connected to the backrest side plate of the seat;

[0030] Angle adjustment motor, the eccentric wheel assembly is connected to the driving shaft of the angle adjustment motor.

[0031] Optionally, the inner ring edge is provided with a mounting boss, the backrest side plate is provided with a mounting hole corresponding to the mounting boss, and the inner ring is fixedly connected to the backrest side plate of the seat via the mounting boss and the mounting hole.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The angle adjuster based on the rolling body circumferential wedge extrusion transmission provided by the present invention realizes transmission and locking by using balls or steel balls as carriers instead of the meshing of teeth, thus avoiding the strength weakness of gear transmission and realizing a small-sized and high-strength electric angle adjuster;

[0034] 2. The angle adjuster based on the rolling element circumferential wedge extrusion transmission provided by the present invention does not have the problem of insufficient strength caused by the cantilever structure of the gear, so the overall structure is more compact, the strength is higher, and the size can be made smaller;

[0035] 3. The recliner based on the rolling element circumferential wedge extrusion transmission provided by the present invention has lower material requirements for parts and can also meet better strength requirements, thereby lowering the threshold of seat recliner production technology and reducing the cost of the recliner. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0037] Figure 1 A schematic diagram of the structure of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided by the embodiment of the present invention Figure 1 ;

[0038] Figure 2 A schematic diagram of the structure of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided by the embodiment of the present invention Figure 2 ;

[0039] Figure 3 A schematic diagram of the structure of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided by the embodiment of the present invention Figure 3 ;

[0040] Figure 4 A schematic structural diagram of a first roller of a recliner based on rolling element circumferential wedge extrusion transmission provided by an embodiment of the present invention;

[0041] Figure 5 A schematic structural diagram of a second roller of a recliner based on rolling body circumferential wedge extrusion transmission provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the structure of a ball of a recliner based on circumferential wedge-shaped extrusion transmission of a rolling body provided in an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the structure of the driving eccentric wheel of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided in an embodiment of the present invention Figure 1 ;

[0044] Figure 8 A schematic diagram of the structure of the driving eccentric wheel of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided in an embodiment of the present invention Figure 2 ;

[0045] Fig. 9 A schematic diagram of the structure of a car seat provided by an embodiment of the present invention Figure 1 ;

[0046] Fig.10 A schematic diagram of the structure of a car seat provided by an embodiment of the present invention Figure 2 ;

[0047] In the figure:

[0048] 1-Inner circle;

[0049] 2-Outer ring;

[0050] 3- rolling element;

[0051] 4-Eccentric wheel assembly;

[0052] 5- first roller;

[0053] 6-First roller restraint circle;

[0054] 7- second roller;

[0055] 8-second roller restraint circle;

[0056] 9- positioning ring;

[0057] 10-ball;

[0058] 11-Ball restraining ring;

[0059] 12-driving eccentric wheel;

[0060] 13-eccentric wheel slider;

[0061] 14- Spring;

[0062] 15- load bearing rod;

[0063] 16-stop ring;

[0064] 17-spring mounting slot;

[0065] 18-stopper;

[0066] 19-cover plate;

[0067] 20-seat cushion side panel;

[0068] 21-backrest side panel;

[0069] 22-angle adjustment motor;

[0070] 23-installing boss;

[0071] 24-Mounting holes. Specific embodiments

[0072] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0073] Figure 1 A schematic diagram of the structure of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided by the embodiment of the present invention Figure 1 ; Figure 2 A schematic diagram of the structure of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided by the embodiment of the present invention Figure 2 ; Figure 3 A schematic diagram of the structure of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided by the embodiment of the present invention Figure 3 ; Figure 4 A schematic structural diagram of a first roller of a recliner based on rolling element circumferential wedge extrusion transmission provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a second roller of a recliner based on rolling body circumferential wedge extrusion transmission provided by an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a ball of a recliner based on circumferential wedge-shaped extrusion transmission of a rolling body provided in an embodiment of the present invention; Figure 7 A schematic diagram of the structure of the driving eccentric wheel of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided in an embodiment of the present invention Figure 1 ; Figure 8 A schematic diagram of the structure of the driving eccentric wheel of the angle adjuster based on the rolling element circumferential wedge extrusion transmission provided in an embodiment of the present invention Figure 2 ; Fig. 9 A schematic diagram of the structure of a car seat provided by an embodiment of the present invention Figure 1 ; Fig.10 A schematic diagram of the structure of a car seat provided by an embodiment of the present invention Figure 2 ; See Figure 1 , Figure 2 , Figure 3 The angle adjuster based on the rolling element circumferential wedge extrusion transmission in this embodiment includes: an inner ring 1, wherein a plurality of first arc grooves are provided on the outer side of the inner ring 1; an outer ring 2, wherein a plurality of second arc grooves are provided on the inner side of the outer ring 2, and the number of the second arc grooves is greater than that of the first arc grooves; a rolling element 3, wherein the rolling element 3 is arranged in an accommodation space formed by the first arc groove and the second arc groove; an eccentric wheel assembly 4, wherein the eccentric wheel assembly 4 is penetrated between the inner ring 1 and the outer ring 2, wherein when the eccentric wheel assembly 4 is stationary, the inner ring 1 is extruded toward the outer ring 2 in the direction of the eccentric force, and the first arc groove transmits torque to the second arc groove through the rolling element 3, so that the inner ring 1 and the outer ring 2 are meshed and adaptively adjusted, and when the eccentric wheel assembly 4 rotates, the inner ring 1 is driven to rotate, and the rolling element 3 rotates relative to the first arc groove and the second arc groove, so that the inner ring 1 and the outer ring 2 rotate relative to each other.

[0074] The angle adjuster of the prior art relies on the meshing of teeth to transmit and lock. When the number of external teeth is greater than that of the internal gear, a speed ratio of the internal and external gear rings is formed. Since the teeth are engaged with each other in a single-tooth cantilever manner to transmit force and torque, high requirements are placed on the strength, processing accuracy, and heat treatment of the material. In addition, there are problems of noise and jitter during the transmission process.

[0075] Compared with the prior art, this embodiment completes transmission by the meshing of the rolling body 3 in the semicircular arc grooves of the inner ring 1 and the outer ring 2, which belongs to the circumferential wedge extrusion transmission of the rolling body 3. The arc grooves of the outer ring 2 are more than the arc grooves of the inner ring 1 to form a speed difference; the meshing and relative movement of the inner and outer rings 2 are completed by the rolling body 3 under the extrusion of external force, and the wedge effect of the eccentric wheel prevents the relative rotation of the inner and outer rings 2 in a static state. This embodiment greatly reduces the requirements for material strength, processing accuracy and heat treatment of materials, so the cost is low, and the problem of noise and jitter during transmission is significantly improved. In addition, unlike the static friction of the cantilever structure, the rolling body 3 rolls in a small range to achieve adaptive adjustment.

[0076] In an alternative embodiment, see Figure 4 The rolling body 3 is a cylindrical first roller 5, and the angle adjuster includes a first roller restraining ring 6.

[0077] A groove is provided in the circumferential middle portion of the first roller 5 , and the first roller restraining ring 6 is embedded in the groove to rotatably restrict the first roller 5 to the outer side of the inner ring 1 .

[0078] In an alternative embodiment, see Figure 5 The rolling body 3 is a cylindrical second roller 7, and the angle adjuster includes a second roller restraining ring 8 and a positioning ring 9. The second roller 7 is hollow in the axial direction. A positioning rod is provided on the side of the second roller restraining ring 8, and the positioning ring 9 is provided with a positioning hole. The positioning rod passes through the second roller 7 and is connected with the positioning hole of the positioning ring 9, so that the second roller 7 is rotatably limited to the outside of the inner ring 1.

[0079] In an alternative embodiment, see Figure 6 The rolling body 3 is a spherical ball 10, and the angle adjuster includes a ball restraining ring 11.

[0080] The restraining ring is provided with a circular hole, and the ball 10 is embedded in the circular hole and is confined to the outer side of the inner ring 1 .

[0081] The roller type can bear greater load and torque; compared with the roller type, the ball type has lower assembly requirements and can allow redundant floating in two directions, that is, the ball type can achieve adaptive adjustment in both the circumferential and circumferential directions, which has good lateral automatic adjustability for rigid connections, and its cost is lower.

[0082] In an alternative embodiment, see Figure 1 , Figure 2 , Figure 6 , Figure 7 The eccentric wheel assembly 4 includes: a driving eccentric wheel 12, an eccentric wheel slider 13, and a spring 14.

[0083] A driving eccentric wheel 12, comprising a first end having a radius adapted to the inner diameter of the inner ring 1, and a second end having a radius adapted to the inner diameter of the outer ring 2, wherein the driving eccentric wheel 12 is disposed through the inner ring 1 and the outer ring 2;

[0084] The eccentric wheel slider 13 includes a semicircular arc slider divided into two and is arranged on the semi-axial surface of the driving eccentric wheel 12.

[0085] A force-bearing support rod 15 is provided at the end of the spring 14 , and a spring fixing groove is provided at the adjacent end of the slider. The force-bearing support rod 15 is inserted into the spring fixing groove, and the spring 14 presses the slider toward the inner ring 1 through the force-bearing support rod 15 .

[0086] In a further embodiment, see Figure 1 , Figure 2 , Figure 6 The eccentric wheel assembly 4 includes a stop ring 16, and a stop ring 16 mounting groove is provided at the second end of the driving eccentric wheel 12. The stop ring 16 is clamped with the second end of the driving eccentric wheel 12 through the stop ring 16 mounting groove to axially fix the inner ring 1 and the outer ring 2.

[0087] In a further embodiment, see Figure 7 , Figure 8 The first end of the driving eccentric wheel 12 is provided with a spring mounting groove 17 , and the spring 14 is embedded in the spring mounting groove 17 .

[0088] In a further embodiment, see Figure 8 The driving eccentric wheel 12 includes a semicircular stopper 18 , and the stopper 18 and the second end of the driving eccentric wheel 12 form a semi-axial surface for setting the eccentric wheel slider 13 .

[0089] In a further embodiment, the eccentric wheel slider 13 is a wedge-shaped slider, and the thickness of the wedge-shaped slider on one side close to the positioning support rod is greater than the thickness on the other side.

[0090] In an optional embodiment, the angle adjuster includes a cover plate 19, which is fixedly connected to the outer ring 2 and confines the rolling element 3 and the inner ring 1 within the outer ring 2. The fixed connection in this embodiment may be, but is not limited to, welding, and those skilled in the art may select a suitable connection method according to the prior art, such as clamping, bonding, etc.

[0091] Second, see Fig. 9 , Fig.10 The present invention provides a car seat, including any of the above-mentioned angle adjusters based on the circumferential wedge extrusion transmission of the rolling body 3, and also including: a cushion side plate 20, the outer ring 2 is fixedly connected to the cushion side plate 20 of the seat; a backrest side plate 21, the inner ring 1 is fixedly connected to the backrest side plate 21 of the seat; an angle adjustment motor 22, the eccentric wheel assembly 4 is connected to the drive shaft of the angle adjustment motor 22. The fixed connection in this embodiment can be but not limited to welding, and those skilled in the art can select a suitable connection method according to the existing technology, such as clamping, bonding, etc.

[0092] In an alternative embodiment, see Fig. 9 , Fig.10 The inner ring 1 is provided with a mounting boss 23 at its edge, the backrest side plate 21 is provided with a mounting hole 24 corresponding to the mounting boss 23, and the inner ring 1 is fixedly connected to the backrest side plate 21 of the seat through the mounting boss 23 and the mounting hole 24. The fixed connection in the embodiment may be, but is not limited to, welding, and those skilled in the art may select a suitable connection method according to the prior art, such as clamping, bonding, etc.

[0093] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0094] 1. The angle adjuster based on the rolling body circumferential wedge extrusion transmission provided by the present invention realizes transmission and locking by using balls or steel balls as carriers instead of the meshing of teeth, thus avoiding the strength weakness of gear transmission and realizing a small-sized and high-strength electric angle adjuster;

[0095] 2. The angle adjuster based on the rolling element circumferential wedge extrusion transmission provided by the present invention does not have the problem of insufficient strength caused by the cantilever structure of the gear, so the overall structure is more compact, the strength is higher, and the size can be made smaller;

[0096] 3. The recliner based on the rolling element circumferential wedge extrusion transmission provided by the present invention has lower material requirements for parts and can also meet better strength requirements, thereby lowering the threshold of seat recliner production technology and reducing the cost of the recliner.

[0097] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A recliner based on rolling element circumferential wedge extrusion transmission, characterized in that: include: An inner ring, wherein a plurality of first arc-shaped grooves are provided on the outer side of the inner ring; An outer ring, wherein a plurality of second arc grooves are provided on the inner side of the outer ring, and the number of the second arc grooves is greater than the number of the first arc grooves; A rolling body, wherein the rolling body is arranged in an accommodation space formed by the first arc groove and the second arc groove; An eccentric wheel assembly is provided between the inner ring and the outer ring, wherein: When the eccentric wheel assembly is stationary, the inner ring is pressed toward the outer ring in the direction of the eccentric force, and the first arc groove transmits torque to the second arc groove through the rolling element, so that the inner ring and the outer ring are meshed and adaptively adjusted. When the eccentric wheel assembly rotates, the inner ring is driven to rotate, and the rolling body rotates relative to the first arc groove and the second arc groove, so that the inner ring and the outer ring rotate relative to each other; The rolling body is a first cylindrical roller, and the angle adjuster includes a first roller restraining ring. A groove is provided at the circumferential middle of the first roller, and the first roller restraining ring is embedded in the groove to rotatably restrict the first roller to the outer side of the inner ring; The angle adjuster comprises a cover plate, which is fixedly connected to the outer ring and confines the rolling body and the inner ring within the outer ring.

2. The angle adjuster based on rolling element circumferential wedge extrusion transmission according to claim 1 is characterized in that: The rolling body is a cylindrical second roller, and the angle adjuster includes a second roller restraining ring and a positioning ring. The second roller is hollow in the axial direction, a positioning rod is provided on the side of the second roller restraining ring, the positioning ring is provided with a positioning hole, the positioning rod passes through the second roller and is connected to the positioning hole of the positioning ring, so that the second roller is rotatably limited to the outside of the inner ring.

3. The angle adjuster based on rolling element circumferential wedge extrusion transmission according to claim 1 is characterized in that: The rolling body is a spherical ball, and the angle adjuster includes a ball restraining ring. The restraining ring is provided with a circular hole, and the ball is embedded in the circular hole and is confined to the outer side of the inner ring.

4. The angle adjuster based on rolling element circumferential wedge extrusion transmission according to claim 1 is characterized in that: The eccentric wheel assembly includes: a driving eccentric wheel, an eccentric wheel slider, and a spring. A driving eccentric wheel, comprising a first end having a radius adapted to the inner diameter of the inner ring, and a second end having a radius adapted to the inner diameter of the outer ring, wherein the driving eccentric wheel is disposed through the inner ring and the outer ring; The eccentric wheel slider comprises a semicircular arc slider divided into two and arranged on the semi-axial surface of the driving eccentric wheel. A force-bearing support rod is provided at the end of the spring, and a spring fixing groove is provided at the adjacent end of the slider. The force-bearing support rod is inserted into the spring fixing groove, and the spring presses the slider toward the inner ring through the force-bearing support rod.

5. The angle adjuster based on rolling element circumferential wedge extrusion transmission according to claim 4 is characterized in that: The eccentric wheel assembly includes a stop ring, and the second end of the driving eccentric wheel is provided with a stop ring installation groove. The stop ring is clamped with the second end of the driving eccentric wheel through the stop ring installation groove to axially fix the inner ring and the outer ring.

6. The angle adjuster based on rolling element circumferential wedge extrusion transmission according to claim 4 is characterized in that: A spring installation groove is provided at the first end of the driving eccentric wheel, and the spring is embedded in the spring installation groove.

7. The angle adjuster based on rolling element circumferential wedge extrusion transmission according to claim 4 is characterized in that: The driving eccentric wheel comprises a semicircular stopper, and the stopper and the second end of the driving eccentric wheel form a semi-axial surface for setting the eccentric wheel slider.

8. The angle adjuster based on rolling element circumferential wedge extrusion transmission according to claim 4 is characterized in that: The eccentric wheel slider is a wedge-shaped slider, and the thickness of the wedge-shaped slider on one side close to the positioning support rod is greater than the thickness on the other side.

9. A car seat, comprising a recliner based on rolling element circumferential wedge extrusion transmission according to any one of claims 1 to 8, characterized in that: The car seat comprises: A cushion side plate, wherein the outer ring is fixedly connected to the cushion side plate of the seat; Backrest side plate, the inner ring is fixedly connected to the backrest side plate of the seat; Angle adjustment motor, the eccentric wheel assembly is connected to the driving shaft of the angle adjustment motor.

10. The vehicle seat according to claim 9, characterized in that The edge of the inner ring is provided with a mounting boss, the backrest side plate is provided with a mounting hole corresponding to the mounting boss, and the inner ring is fixedly connected to the backrest side plate of the seat through the mounting boss and the mounting hole.

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