Rotating chair rotating device

Abstract

The rotating device of the rotating chair comprises a sleeve seat and a rotating assembly, a rotating hole is formed in the axis of the sleeve seat, a clamping ring is arranged on the inner side wall of the rotating hole, the rotating assembly comprises a supporting column, a clamping pad, a locking rod, a thrust ball bearing and two ball bearings, the two ball bearings are both located in the rotating hole and abut against the two sides of the clamping ring respectively, and the clamping pad is arranged on the supporting column. The supporting column sequentially penetrates through the thrust ball bearing and the two ball bearings, and the locking rod penetrates through the clamping pad and is in threaded connection with the supporting column so that the clamping pad can be connected with the ball bearing away from the thrust ball bearing in a clamped mode, and therefore the supporting column can rotate relative to the sleeve base. Thus, according to the rotating device of the rotating chair, the supporting column and the chair seat are fixedly installed, and by means of the matching effect of the ball bearing and the thrust ball bearing, the large-weight chair seat can be borne, so that the chair seat can stably rotate relative to the sleeve seat.

Description

Technical Field

[0001] This utility model relates to the technical field of furniture, and in particular to a rotating device for a swivel chair. Background Technology

[0002] A swivel chair is a common type of office furniture, named for its ability to rotate freely around a vertical axis. It not only improves work efficiency but also provides users with greater flexibility and comfort.

[0003] Existing swivel chairs mainly rely on rotary cylinders as intermediate components to enable the seat and legs to rotate relative to each other.

[0004] However, existing rotary cylinders have the following shortcomings: as people's living standards improve, they increasingly pursue chair comfort, leading to larger and larger chairs. This increased size also means increased weight. Existing rotary cylinders, due to their telescopic function, have a certain height, making them unsuitable for low-profile rotating seats. Furthermore, the stability of these cylinders cannot meet the demands of heavy loads. Therefore, to address these issues, the rotating chair rotating device of this application is proposed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a swivel chair rotation device that is suitable for low-profile rotating seats and has high stability.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A swivel chair rotation device, comprising:

[0008] A sleeve, wherein a rotating hole is formed at the center of the sleeve, and a retaining ring is provided on the inner sidewall of the rotating hole; and

[0009] The rotating assembly includes a support column, a retaining washer, a locking rod, a thrust ball bearing, and two ball bearings. The two ball bearings are located within the rotating hole and respectively abut against both sides of the retaining ring. The support column is sequentially fitted with the thrust ball bearing and the two ball bearings. The locking rod passes through the retaining washer and is screwed to the support column, so that the retaining washer engages with the ball bearing furthest from the thrust ball bearing, thereby allowing the support column to rotate relative to the sleeve.

[0010] Optionally, the retaining ring and the sleeve are integrally formed.

[0011] Optionally, the outer diameter of the pad is larger than the inner diameter of the ball bearing.

[0012] Optionally, the support column includes a support base, a top support block, and a spindle. The top support block is disposed on the bottom side of the support base, and one end of the spindle is disposed on the top support block. The spindle passes through the thrust ball bearing and two ball bearings so that the top support block abuts against the thrust ball bearing.

[0013] Optionally, the support has an inclined top surface on the end face away from the mandrel.

[0014] Optionally, a mounting plate is provided on the inclined top surface, the mounting plate being used to fix the chair seat.

[0015] Optionally, the mounting plate has a plurality of mounting holes.

[0016] Optionally, it also includes a number of legs, each of which is arranged at equal angles around the circumference on the outer side wall of the sleeve.

[0017] Optionally, the support leg is welded to the sleeve.

[0018] Optionally, a pad is provided on the end of the support leg away from the sleeve, and the pad is used to abut against the ground.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] This utility model discloses a swivel chair rotation device, comprising a base and a rotating assembly. The base has a rotating hole at its axis, and a retaining ring is provided on the inner wall of the rotating hole. The rotating assembly includes a support column, a retaining washer, a locking rod, a thrust ball bearing, and two ball bearings. Both ball bearings are located within the rotating hole and abut against the two sides of the retaining ring. The support column is sequentially fitted with the thrust ball bearing and the two ball bearings. The locking rod is fitted with the retaining washer and screwed to the support column, so that the retaining washer engages with the ball bearing furthest from the thrust ball bearing, thereby allowing the support column to rotate relative to the base. Thus, using this swivel chair rotation device, where the support column is fixedly installed to the chair seat, the combined action of the ball bearings and the thrust ball bearings can support a heavy chair seat, allowing the chair seat to rotate stably relative to the base. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the rotating device of a swivel chair according to one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A cross-sectional schematic diagram of a portion of the rotating mechanism of the swivel chair shown.

[0024] Figure 3 for Figure 2 The diagram shows an exploded cross-section of a portion of the rotating mechanism of the swivel chair.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Rotating mechanism of swivel chair; 100. Sleeve; 200. Rotating assembly; 110. Rotating hole; 300. Snap ring; 210. Support column; 220. Snap pad; 230. Locking rod; 240. Thrust ball bearing; 250. Ball bearing; 211. Support seat; 212. Top support block; 213. Spindle; 2111. Sloping top surface; 260. Mounting plate; 261. Mounting hole; 270. Support leg; 280. Pad block. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0028] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0031] like Figures 1 to 3 As shown, a swivel chair rotating device 10 includes a base 100 and a rotating assembly 200. The base 100 has a rotating hole 110 at its axis, and a retaining ring 300 is provided on the inner side wall of the rotating hole 110. The rotating assembly 200 includes a support column 210, a retaining pad 220, a locking rod 230, a thrust ball bearing 240, and two ball bearings 250. The two ball bearings 250 are both located in the rotating hole 110, and the two ball bearings 250 respectively abut against the two sides of the retaining ring 300. The thrust ball bearing 240 and the two ball bearings 250 are sequentially inserted through the support column 210. The locking rod 230 is inserted through the retaining pad 220 and screwed to the support column 210, so that the retaining pad 220 engages with the ball bearing 250 that is away from the thrust ball bearing 240, thereby causing the support column 210 to rotate relative to the base 100.

[0032] It should be noted that a rotating hole 110 is formed along the axis on the sleeve 100, and a retaining ring 300 is provided on the inner side wall of the rotating hole 110. In one embodiment, the retaining ring 300 and the sleeve 100 are integrally formed. For example, the retaining ring 300 is formed in the sleeve 100 by a lathe, so that the retaining ring 300 and the sleeve 100 have sufficient structural strength. Two ball bearings 250 are installed in the rotating hole 110, and the two ball bearings 250 abut against the two sides of the retaining ring 300, and the two ball bearings 250 are coaxially distributed. The support column 210 fits through the thrust ball bearing 240 and then passes through the two ball bearings 250 in sequence. In this way, the thrust ball bearing 240 abuts against one of the ball bearings 250. The locking rod 230 passes through the retaining pad 220 and then abuts against the ball bearing 250 away from the thrust ball bearing 240. Thus, the locking rod 230 locks the retaining pad 220, which is held in place by the ball bearing 250, allowing the support column 210 to be stably inserted into the rotating hole 110, enabling the support column 210 to rotate stably relative to the sleeve 100. Thus, using the swivel chair rotating device 10 of this application, where the support column 210 is fixedly installed with the chair seat, the cooperation of the ball bearing 250 and the thrust ball bearing 240 can support a heavy chair seat.

[0033] like Figure 2As shown, in one embodiment, the outer diameter of the retaining pad 220 is larger than the inner diameter of the ball bearing 250. This ensures that when the locking rod 230 locks the retaining pad 220 onto the support column 210, the retaining pad 220 can securely hold the inner ring of the ball bearing 250, preventing the support column 210 from dislodging from the ball bearing 250.

[0034] like Figure 2 and Figure 3 As shown, in one embodiment, the support column 210 includes a support base 211, a top support block 212, and a spindle 213. The top support block 212 is disposed on the bottom side of the support base 211, and one end of the spindle 213 is disposed on the top support block 212. The spindle 213 is provided with a thrust ball bearing 240 and two ball bearings 250, so that the top support block 212 abuts against the thrust ball bearing 240.

[0035] It should be noted that the top support block 212 is located on one end face of the support base 211, and the diameter of the top support block 212 is smaller than the diameter of the support base 211. One end of the mandrel 213 is fixed to the top support block 212, and the diameter of the mandrel 213 is smaller than the diameter of the top support block 212. The mandrel 213, the top support block 212, and the support base 211 are coaxial. Furthermore, the mandrel 213, the top support block 212, and the support base 211 are integrally formed structures, for example, the support base 211, the top support block 212, and the mandrel 213 are formed by lathe machining, so that the support column 210 has sufficient structural strength. Thus, when the mandrel 213 passes through the thrust ball bearing 240 and the two ball bearings 250, the top support block 212 abuts against the thrust ball bearing 240. Thus, when the chair seat is mounted on the support 211, the weight of the chair seat can be transmitted through the top support block 212 to the thrust ball bearing 240, then from the thrust ball bearing 240 to the outer ring of the contacting ball bearing 250, and finally from the outer ring of the contacting ball bearing 250 to the retaining ring 300. It should be noted that the thrust ball bearing 240 can withstand pressure in the opposite axial direction, while the ball bearings allow the support column 210 to rotate stably relative to the sleeve 100. Thus, through the combined action of the thrust ball bearing 240 and the two ball bearings 250, the support column 210 can rotate stably relative to the sleeve 100, even when a chair seat weighing over 350 kg is mounted on the support column 210.

[0036] like Figure 1 As shown, in one embodiment, a sloping top surface 2111 is provided on the end face of the support 211 away from the spindle 213. In this way, by pre-setting the sloping top surface 2111, it is convenient for the chair seat to be installed and fixed on the support 211.

[0037] like Figure 1 As shown, in one embodiment, a mounting plate 260 is provided on the inclined top surface 2111, and the mounting plate 260 is used to fix the chair seat.

[0038] It should be noted that the mounting plate 260 is welded onto the inclined top surface 2111 of the support 211, so that the chair seat can be fixed on the mounting plate 260 to be stably installed and fixed to the support column 210.

[0039] like Figure 1 As shown, in one embodiment, the mounting plate 260 has a plurality of mounting holes 261. Thus, bolts and other fasteners can pass through the mounting holes 261 and be screwed onto the chair seat, allowing the chair seat to be quickly and securely mounted on the mounting plate 260, thereby improving the installation efficiency of the swivel chair.

[0040] like Figure 1 As shown, in one embodiment, the swivel chair rotating device 10 further includes a plurality of legs 270, each leg 270 being arranged at equal angles around the circumference on the outer side wall of the base 100.

[0041] It should be noted that one end of each support leg 270 is mounted at an equal angle on the outer wall of the sleeve 100, so that the support legs 270 are distributed in a star shape relative to the sleeve 100. In one embodiment, the support legs 270 are welded to the sleeve 100. Thus, after the sleeve 100 is formed by machining on a lathe, the support legs 270 are welded to the outer wall of the sleeve 100, which facilitates manufacturing. Further, in one embodiment, the support legs 270 extend obliquely downward away from the sleeve 100, so that the end of the support leg 270 away from the sleeve 100 contacts the ground, and the sleeve 100 is at a certain distance from the ground. Further, in one embodiment, four support legs 270 are provided. In yet another embodiment, five support legs 270 are provided.

[0042] like Figure 1 As shown, in one embodiment, a pad 280 is provided on the end of the support leg 270 away from the base 100, and the pad 280 is used to abut against the ground. In this way, the pad 280 contacts the ground, so that each support leg 270 and the base 100 can form a stable support structure, thereby stably supporting the heavy chair seat.

[0043] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this utility model can be understood to include, but is not limited to, locking and fixing with screws / bolts, and welding. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rotating device for a swivel chair, characterized in that, include: A sleeve, wherein a rotating hole is formed at the center of the sleeve, and a retaining ring is provided on the inner sidewall of the rotating hole; and The rotating assembly includes a support column, a retaining washer, a locking rod, a thrust ball bearing, and two ball bearings. The two ball bearings are located within the rotating hole and respectively abut against both sides of the retaining ring. The support column is sequentially fitted with the thrust ball bearing and the two ball bearings. The locking rod passes through the retaining washer and is screwed to the support column, so that the retaining washer engages with the ball bearing furthest from the thrust ball bearing, thereby allowing the support column to rotate relative to the sleeve.

2. The rotating chair rotating device according to claim 1, characterized in that, The retaining ring and the sleeve are integrally formed.

3. The rotating chair rotating device according to claim 1, characterized in that, The outer diameter of the pad is larger than the inner diameter of the ball bearing.

4. The rotating chair rotating device according to claim 1, characterized in that, The support column includes a support base, a top support block, and a spindle. The top support block is disposed on the bottom side of the support base, and one end of the spindle is disposed on the top support block. The spindle passes through the thrust ball bearing and two ball bearings so that the top support block abuts against the thrust ball bearing.

5. The rotating chair rotating device according to claim 4, characterized in that, The support has an inclined top surface on the end face away from the mandrel.

6. The rotating chair rotating device according to claim 5, characterized in that, A mounting plate is provided on the sloping top surface, and the mounting plate is used to fix the chair seat.

7. The rotating chair rotating device according to claim 6, characterized in that, The mounting plate has several mounting holes.

8. The rotating chair rotating device according to claim 1, characterized in that, It also includes several legs, each of which is arranged at equal angles around the circumference on the outer side wall of the sleeve.

9. The rotating chair rotating device according to claim 8, characterized in that, The support leg is welded to the sleeve.

10. The rotating chair rotating device according to claim 8, characterized in that, A pad is provided on the end of the support leg away from the sleeve, and the pad is used to abut against the ground.

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