Seat armrest rotating device
By designing a seat armrest rotation device that uses sliding bearings and inner bearings to reduce radial clearance with the hollow structure of the inner bearing, the existing seat armrests are shaken and noisy when rotating, achieving a longer service life and a better user experience.
Patent Information
- Application Number
- CN202422174496.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-09-05
AI Technical Summary
When lifted or lowered, the existing seat armrests are shaken and noise due to the gap between the rotating member and the fixing member, and are prone to premature damage due to friction and collision, reducing service life.
A seat armrest rotating device is designed, using a housing and an internal toothed disk mounted on the shaft. The housing and the shaft are connected by a sliding bearing, and the shaft and the internal toothed disk are connected by an internal bearing. The convex columns of the inner bearing are combined with the annular base with a hollow structure to provide deformation space to reduce radial clearance.
It effectively reduces the amount of shaking and noise during rotation, extends the service life of the seat armrests, and provides a good user experience.
Smart Images
Figure CN222707883U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of seats, and in particular relates to a seat armrest rotating device. Background Art
[0002] When the current seat armrests are raised or lowered, there is a gap between the rotating part and the fixed part, which causes a large amount of shaking during rotation and even generates noise, giving the user a very bad experience. In addition, due to shaking and friction, the rotating parts of the seat armrests that cooperate with each other are easily damaged prematurely due to collision or wear, thereby reducing their service life. Summary of the invention
[0003] The object of the present invention is to provide a seat armrest rotating device which has small shaking, small noise, long service life and good user experience when the seat armrest is rotated to be lifted or lowered.
[0004] The object of the present invention is to solve like this:
[0005] A seat armrest rotating device comprises an outer shell and an inner gear plate mounted on a rotating shaft, the inner gear plate is fixed on the opening of the outer shell, a sliding bearing is rotatably connected between the outer shell and the rotating shaft, an inner bearing is rotatably connected between the rotating shaft and the inner gear plate, and the specific structure of the inner bearing is: two or more axially extending bosses are circumferentially spaced apart on one end face of an annular base, each of the bosses is provided with a through hole axially penetrating the annular base and the boss, and the inner side surface of the boss matches the inner side surface of the annular base.
[0006] As a further optimization of the above technical solution, the inner side surface of the convex column and the inner side surface of the annular base are both arc surfaces.
[0007] As a further optimization of the above technical solution, the cross section of the boss is arc-shaped, the through hole is a cylindrical hole with the outer contour of the boss reduced in proportion, and the cylindrical body formed by the through hole on the boss has a constant wall thickness.
[0008] As a further optimization of the above technical solution, protrusions with arc-shaped cross-sections are circumferentially arranged at intervals on the outer side surface of the boss, and the protrusions extend to the annular base at the boss.
[0009] As a further optimization of the above technical solution, a transition arc is formed at the junction between the boss and the annular base between two adjacent bosses.
[0010] As a further optimization of the above technical solution, the inner bearing is made of plastic material.
[0011] As a further optimization of the above technical solution, an annular groove is arranged on the rotating shaft outside the shell, and a retaining ring for positioning the shell is arranged on the annular groove.
[0012] As a further optimization of the above technical solution, the end of the opening side of the shell is circumferentially spaced with more than three mounting ears that first extend axially and then flanging outwards, and the mounting ears are provided with mounting holes.
[0013] As a further optimization of the above technical solution, the rotating shaft and the inner bearing are interference fit.
[0014] As a further optimization of the above technical solution, there are three bosses, a circumferential through hole is centrally arranged on the inner gear disc, three grooves for the three bosses to pass through respectively are arranged on the side walls of the through hole, and the inner gear disc and the bosses are interference fit.
[0015] The outstanding advantage of the present invention over the prior art is that since the main part (convex column) of the inner bearing of the present invention adopts a hollow structure, deformation space of the inner bearing is provided for the interference fit between the rotating shaft and the inner bearing, and deformation space of the inner bearing is also provided for the interference fit between the inner gear plate and the inner bearing, which not only effectively reduces the radial clearance between the rotating shaft and the inner bearing, but also reduces the radial and lateral clearances between the inner gear plate and the inner bearing. When the seat armrest is raised or lowered, the shaking amount is small, the noise is small, and the service life is long, which provides the user with a good use experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention.
[0017] Figure 2 It is an axial cross-sectional view of the present invention.
[0018] Figure 3 It is the front view of the present invention.
[0019] Figure 4 yes Figure 3 AA section view.
[0020] Figure 5 It is a three-dimensional schematic diagram of the inner bearing of the present invention. DETAILED DESCRIPTION
[0021] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-Figure 5 :
[0022] A seat armrest rotating device includes an outer shell 30 and an inner gear disc 50 sleeved on a rotating shaft 10, wherein the inner gear disc 50 is fixed on an opening of the outer shell 30, a sliding bearing 60 is rotatably connected between the outer shell 30 and the rotating shaft 10, and an inner bearing 20 is rotatably connected between the rotating shaft 10 and the inner gear disc 50. The specific structure of the inner bearing 30 is as follows: two or more axially extending protrusions 26 are circumferentially spaced apart on one end surface of an annular base 23, each of the protrusions 26 is provided with a through hole 21 axially penetrating the annular base 23 and the protrusion 26, and the inner side surface of the protrusion 26 matches the inner side surface of the annular base 23.
[0023] As a further optimization of the above technical solution, the inner side surface of the protruding column 26 and the inner side surface of the annular base 23 are both arc surfaces, so as to cooperate with the outer surface of the rotating shaft 10.
[0024] As a further optimization of the above technical solution, the cross section of the boss 26 is arc-shaped, the through hole 21 is a cylindrical hole with the outer contour of the boss 26 reduced in proportion, and the cylindrical body formed by the through hole 21 on the boss 26 has a constant wall thickness.
[0025] As a further optimization of the above technical solution, protrusions 25 with arc-shaped cross sections are circumferentially arranged at intervals on the outer side surface of the boss 26 , and the protrusions 25 extend to the annular base 23 at the boss 26 .
[0026] As a further optimization of the above technical solution, a curved surface transition 24 is formed at the junction of the protruding column 26 and the annular base 23 between two adjacent protruding columns 26 .
[0027] As a further optimization of the above technical solution, the inner bearing 20 is made of plastic material.
[0028] As a further optimization of the above technical solution, an annular groove is provided on the rotating shaft 10 outside the outer shell 30 , and a retaining ring 40 for positioning the outer shell 30 is provided on the annular groove.
[0029] As a further optimization of the above technical solution, the end of the opening side of the housing 10 is circumferentially spaced with more than three mounting ears 31 that are first axially extended and then flanging outwards, and the mounting ears 31 are provided with mounting holes 32.
[0030] As a further optimization of the above technical solution, the rotating shaft 10 and the inner bearing 20 are interference fit. Since the inner bearing 20 of the present invention is provided with an axial through hole 21, the inner bearing 20 has room for deformation when the rotating shaft 10 and the inner bearing 20 are interference fit. Since the rotating shaft 10 and the inner bearing 20 are interference fit, the radial clearance between the rotating shaft 10 and the inner bearing 20 is reduced, and there will be no shaking when the inner bearing 20 and the rotating shaft 10 rotate relative to each other.
[0031] As a further optimization of the above technical solution, there are three bosses 26, an axial through hole 34 is centrally arranged on the inner toothed disc 50, and three grooves 33 for the three bosses 26 to pass through are arranged on the side walls of the through hole 34, and the inner toothed disc 50 is interference fit with the inner bearing 20; since the inner bearing 20 of the present invention is provided with an axial through hole 21, the inner bearing 20 has room for deformation when the inner toothed disc 50 and the inner bearing 20 are interference fit, and since the inner toothed disc 50 and the inner bearing 20 are interference fit, the strength of the combination is increased, the radial and lateral clearances between the inner toothed disc 50 and the inner bearing 20 are reduced, and the amount of shaking between the inner toothed disc 50 and the inner bearing 20 is reduced.
[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions or technical features described in the aforementioned embodiments can still be simply replaced or modified with similar technologies, and these simple replacements or modifications do not deviate the essence of the corresponding technical solutions from the spirit and essence of the technical solutions of the embodiments of the present invention, and are still within the protection scope of the present invention.
Claims
1. A seat armrest rotating device, characterized in that: It includes an outer shell and an inner gear plate sleeved on a rotating shaft, the inner gear plate is fixed on the opening of the outer shell, a sliding bearing is rotatably connected between the outer shell and the rotating shaft, an inner bearing is rotatably connected between the rotating shaft and the inner gear plate, and the specific structure of the inner bearing is: more than two axially extending protruding columns are circumferentially spaced on one end surface of the annular base, each of the protruding columns is provided with a through hole axially penetrating the annular base and the protruding column, and the inner side surface of the protruding column matches the inner side surface of the annular base.
2. A seat armrest rotating device according to claim 1, characterized in that: The inner side surface of the convex column and the inner side surface of the annular base are both arc surfaces.
3. The seat armrest rotating device according to claim 1, characterized in that: The cross section of the convex column is in an arc shape, the through hole is a cylindrical hole whose outer contour of the convex column is proportionally reduced, and the cylindrical body formed by the through hole on the convex column has a constant wall thickness.
4. The seat armrest rotating device according to claim 1, characterized in that: Protrusions with arc-shaped cross sections are circumferentially arranged at intervals on the outer side surface of the protruding column, and the protrusions extend to the annular base at the protruding column.
5. The seat armrest rotating device according to claim 1, characterized in that: The connection between the protruding column and the annular base between two adjacent protruding columns has an arc-shaped transition.
6. The seat armrest rotating device according to claim 1, characterized in that: The inner bearing is made of plastic material.
7. The seat armrest rotating device according to claim 1, characterized in that: An annular groove is arranged on the rotating shaft outside the shell, and a retaining ring for positioning the shell is arranged on the annular groove.
8. The seat armrest rotating device according to claim 1, characterized in that: The end of the opening side of the shell is provided with more than three mounting ears spaced circumferentially, which are first axially extended and then turned outward, and the mounting ears are provided with mounting holes.
9. A chair armrest rotating device according to any one of claims 1 to 8, characterized in that: The rotating shaft and the inner bearing are interference fit.
10. The seat armrest rotating device according to claim 8, characterized in that: There are three protruding columns, a circumferential through hole is centrally arranged on the inner gear disc, and three grooves for the three protruding columns to pass through are arranged on the side walls of the through hole. The inner gear disc and the protruding columns are interference fit.