Centering electric angle adjuster for seat

Abstract

The utility model discloses a centering electric angle adjuster for a seat, which relates to the technical field of seat adjustment, and comprises a first gear housing and a second gear housing which are symmetrically and rotatably arranged in a sleeve ring, and a central shaft penetrating through the middle parts of the first gear housing and the second gear housing, and the opposite surfaces of the first gear housing and the second gear housing are respectively provided with a gear housing concave cavity; an eccentric ring is eccentrically fixed to the middle of the outer side face of the center shaft, a gear and a semi-annular protruding strip are fixedly connected to the outer side face of the eccentric ring, the gear is eccentrically connected with a concave cavity of the gear shell in a meshed mode, and a gap eliminating mechanism is arranged on the inner ring face of the second gear shell and driven by the protruding strip. A check ring is fixed to the side, away from the first gear shell, of the second gear shell. According to the utility model, through the matching arrangement of the first gear housing, the second gear housing and the gear, one of the first gear housing and the second gear housing can be fixed with the seat, and the installation universality is better.

Description

Technical Field

[0001] The utility model relates to the technical field of seat adjustment, and more specifically to a centering electric angle adjuster for a seat. Background Art

[0002] Among the tens of thousands of parts in a car, the car seat may not seem "inconspicuous", but it is the most important part related to the comfort of passengers. Passenger cars or commercial vehicles such as cars are usually equipped with a recliner to adjust the seat back angle so that the seat back fits the comfortable curve of the human back. With the continuous improvement of modern electrical automation technology and the rapid development of the new energy vehicle industry, people's demand for automatic adjustment of car seats is getting higher and higher. The electric recliners that were originally only equipped on some high-end luxury cars have also become standard equipment for some mid- and low-end cars. Among them, the embedded electric recliners are favored by the majority of manufacturers due to their compact structure, small size, space saving, and low production cost. In particular, the internal meshing disc electric recliners have the advantages of strong load-bearing capacity, easy operation, sensitive response, smooth adjustment, and high automation efficiency.

[0003] The Chinese invention patent with application number CN202211252798.X discloses an electric recliner for car seats, including an inner gear housing with an outer gear ring and an inner gear housing through hole; an outer gear housing with an inner gear ring inside, the outer gear housing and the inner gear housing constitute a differential planetary gear transmission structure, and the center of the outer gear housing has an outer gear housing sleeve, and the sleeve has an outer gear housing sleeve through hole. Although: ensuring the stability and smoothness of operation; improving the applicability of components, reducing maintenance costs; and improving riding comfort, the universality of the electric recliner for the seat is poor, and only one side can be fixed to drive the seat adjustment.

[0004] Therefore, it is necessary to propose a centering electric recliner for a seat to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the problem that the existing electric recliner for seats has poor installation versatility and can only fix one side to drive the seat adjustment.

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] A centering electric recliner for a seat comprises a first gear housing and a second gear housing symmetrically rotatably arranged in a sleeve ring and a central axis penetrating through the middle of the first gear housing and the second gear housing, the first gear housing and the second gear housing having gear housing concave cavities on opposite surfaces, an eccentric ring eccentrically fixed to the middle of the outer side surface of the central axis, a gear and a semi-annular convex strip fixedly connected to the outer side surface of the eccentric ring, the gear being eccentrically meshed with the gear housing concave cavity, a clearance elimination mechanism being arranged on the inner ring surface of the second gear housing, the clearance elimination mechanism being driven by the convex strip, and a retaining ring being fixed to the side of the second gear housing away from the first gear housing.

[0008] Furthermore, the clearance eliminating mechanism includes two arc-shaped clearance eliminating blocks and a torsion spring inserted at adjacent ends of the two clearance eliminating blocks, the end of the clearance eliminating block away from the torsion spring fits the end of the convex strip, and the clearance eliminating block fits the inner annular surface of the second gear housing.

[0009] Furthermore, the inner side surface of the retaining ring fits the outer side surface of the central axis.

[0010] Furthermore, a shaft sleeve is fixedly connected to one end of the central shaft away from the retaining ring, and the outer side surface of the shaft sleeve fits the inner annular surface of the first gear housing.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The utility model, through the matching arrangement between the first gear housing, the second gear housing and the gear, enables one of the first gear housing and the second gear housing to be fixed to the seat, and the installation versatility is good.

[0013] 2. The utility model can reduce the gap of the recliner and the rocking gap of the backrest by setting the gap elimination mechanism, thereby increasing the comfort of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional front view schematic diagram of the utility model;

[0015] Figure 2 It is a three-dimensional rear view schematic diagram of the utility model;

[0016] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 4 It is a rear-view axial stereoscopic separation schematic diagram of the structure of the utility model;

[0018] Figure 5 It is a front-view axial stereoscopic separation schematic diagram of the structure of the utility model.

[0019] Figure numerals: 1, fitting ring; 2, first gear housing; 3, shaft sleeve; 4, gear; 5, eccentric ring; 6, convex strip; 7, clearance eliminating block; 8, torsion spring; 9, second gear housing; 10, gear housing cavity; 11, retaining ring; 12, center axis. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 A centering electric recliner for a seat comprises a first gear housing 2 and a second gear housing 9 symmetrically rotatably arranged in a sleeve ring 1 and a central shaft 12 penetrating through the middle of the first gear housing 2 and the second gear housing 9, the middle of the central shaft 12 being used to plug in the drive shaft of the drive motor, the first gear housing 2 and the second gear housing 9 having gear housing concave cavities 10 on opposite surfaces, wherein the number of teeth in the gear housing concave cavities 10 is different, but both have teeth meshing with the gear 4, an eccentric ring 5 is eccentrically fixed to the middle of the outer side surface of the central shaft 12, the outer side surface of the eccentric ring 5 is fixedly connected to the gear 4 and a semi-annular convex strip 6, the gear 4 is eccentrically meshed with the gear housing concave cavities 10, the inner ring surface of the second gear housing 9 is provided with a clearance elimination mechanism, the clearance elimination mechanism is driven by the convex strip 6, and a retaining ring 11 is fixed to the side of the second gear housing 9 away from the first gear housing 2.

[0022] Specific, combined Figure 3-5 As shown, the gap eliminating mechanism includes two arc-shaped gap eliminating blocks 7 and a torsion spring 8 inserted at the adjacent ends of the two gap eliminating blocks 7, the end of the gap eliminating block 7 away from the torsion spring 8 fits the end of the convex strip 6, and the gap eliminating block 7 fits the inner annular surface of the second gear housing 9. This device is a prior art, and reference can be made to the relevant structure and working distance in the electric recliner for automobile seats disclosed in application number 202211252798.X.

[0023] Specifically, in order to ensure the accuracy during transmission, the inner side surface of the retaining ring 11 is fitted into the outer side surface of the center shaft 12. At the same time, a circular ring for fitting into the second gear housing 9 is also provided on the retaining ring 11 to support the second gear housing 9. At the same time, the end of the center shaft 12 away from the retaining ring 11 is fixedly connected with a sleeve 3, and the outer side surface of the sleeve 3 fits into the inner ring surface of the first gear housing 2. Under the action of the retaining ring 11 and the sleeve 3, the driving accuracy of the first gear housing 2 and the second gear housing 9 is ensured to be better.

[0024] Working principle: During installation, either the first gear housing 2 or the second gear housing 9 can be selected to be fixed to the car seat, wherein when the second gear housing 9 is used to adjust the angle of the seat back, when the passenger needs to adjust the angle of the car seat back during use, the adjustment button is pressed to make the drive shaft of the drive motor directly drive the central shaft 12 to rotate, and the eccentric ring 5 and the convex strip 6 rotate with the rotation of the central shaft 12, and the convex strip 6 drives the gap elimination block 7 to squeeze the torsion spring 8 and fit the other gap elimination block 7, and the gap elimination block 7 is subjected to the force of the convex strip 6 so that the gap elimination block 7 also starts to rotate, and when the tensioning force of the torsion spring 8 is sufficient to offset the friction force of the gap elimination block 7 on the other side, the two gap elimination blocks 7 start to rotate in the same direction, and the gear 4 drives the second gear housing 9 to rotate, thereby driving the angle of the seat back to be adjusted, thereby eliminating the gap between the gear 4 and the gear housing cavity 10.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A centering electric recliner for a seat, characterized in that: It includes a first gear housing and a second gear housing symmetrically rotatably arranged in a fitting ring and a central axis that passes through the middle of the first gear housing and the second gear housing, the first gear housing and the second gear housing having gear housing concave cavities on opposite surfaces, an eccentric ring is eccentrically fixed to the middle of the outer side surface of the central axis, a gear and a semi-annular convex strip are fixedly connected to the outer side surface of the eccentric ring, the gear is eccentrically meshed with the gear housing concave cavity, a clearance elimination mechanism is provided on the inner ring surface of the second gear housing, the clearance elimination mechanism is driven by the convex strip, and a retaining ring is fixed to the side of the second gear housing away from the first gear housing.

2. The electric recliner for a seat according to claim 1, characterized in that: The clearance eliminating mechanism comprises two arc-shaped clearance eliminating blocks and a torsion spring inserted at adjacent ends of the two clearance eliminating blocks, the end of the clearance eliminating block away from the torsion spring fits the end of the convex strip, and the clearance eliminating block fits the inner annular surface of the second gear housing.

3. The electric recliner for a seat according to claim 1, characterized in that: The inner side surface of the retaining ring is in contact with the outer side surface of the central axis.

4. The electric recliner for a seat according to claim 1, characterized in that: One end of the central shaft away from the retaining ring is fixedly connected with a shaft sleeve, and the outer side surface of the shaft sleeve fits the inner annular surface of the first gear housing.

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