Center shaft for seat

Abstract

The utility model relates to a center shaft for a seat, which comprises a mounting sleeve, a rotating shaft, a rotating assembly and a rotating limiting piece, the rotating assembly comprises a first bearing and a second bearing, and the first bearing and the second bearing are coaxially fixed with the rotating shaft respectively; the rotating shaft is rotationally connected with the mounting sleeve through the first bearing and the second bearing, the rotating limiting piece is coaxially fixed to the rotating shaft, the rotating limiting piece is located between the first bearing and the second bearing, and when the rotating shaft is located in the mounting sleeve, the rotating limiting piece is located between the first bearing and the second bearing. And the rotation limiting piece abuts against the inner wall of the mounting sleeve, the rotation limiting piece is used for increasing the resistance generated when the rotating shaft rotates along the mounting sleeve, and the effect of reducing deflection generated when the seat rotates is achieved.

Description

Technical Field

[0001] The present application relates to the field of seats, and in particular to a central axis for seats. Background Art

[0002] The rotatable chair is characterized by its excellent flexibility and convenience. It can easily adjust the orientation, optimize space utilization, enhance communication and interaction, and bring a more comfortable and efficient experience to users.

[0003] There is a rotating seat, which includes a seat plate, a rotating mechanism, a lifting device and a chassis. The rotating mechanism is arranged on the chassis, the lifting device is connected to the rotating mechanism, and the seat plate is arranged on the rotating mechanism. By applying a force to the seat plate, the lifting device can carry the seat plate to rotate along the rotating mechanism. The rotating mechanism includes a rotating disk and a rotating shaft. The rotating disk is arranged on the chassis, the rotating shaft is coaxially fixed with the rotating disk, and the rotating shaft is connected to the lifting device, which is highly practical.

[0004] However, when the user sits on the seat, the seat is supported by the rotating shaft and the lifting device, and the rotating shaft will be subjected to a large force. As the use time increases, there will be a gap between the pull and the rotating disk, resulting in a wobble between the rotating shaft and the rotating disk, which reduces the user experience and leaves room for improvement. Utility Model Content

[0005] In order to reduce the deflection of the seat when it rotates, the present application provides a central axis for the seat.

[0006] The central axis of a seat provided in this application adopts the following technical solution:

[0007] A central axis for a seat, comprising a mounting sleeve, a rotating shaft, a rotating assembly and a rotation limiting member, the rotating assembly comprising a first bearing and a second bearing, the first bearing and the second bearing being respectively coaxially fixed with the rotating shaft, the rotating shaft being rotatably connected to the mounting sleeve via the first bearing and the second bearing, the rotation limiting member being coaxially fixed with the rotating shaft, and the rotation limiting member being located between the first bearing and the second bearing, and when the rotating shaft is located in the mounting sleeve, the rotation limiting member abuts against the inner wall of the mounting sleeve, and the rotation limiting member is used to increase the resistance of the rotating shaft when rotating along the mounting sleeve.

[0008] By adopting the above technical solution, since the first bearing and the second bearing are coaxially fixed, and the first bearing and the second bearing are rotatably connected to the mounting sleeve, the rotating shaft can stably rotate along the mounting sleeve, which plays a positive guiding role in reducing the deflection of the rotating shaft when rotating along the mounting sleeve. At the same time, the resistance of the rotating shaft when rotating along the mounting sleeve is increased by the rotation limiting member, so that the rotating shaft can rotate along the mounting sleeve only when a certain force needs to be applied to the rotating shaft, thereby reducing the probability of the rotating shaft rotating too fast along the mounting sleeve due to the small rotational friction generated between the rotating shaft and the mounting sleeve.

[0009] Preferably, the rotating assembly further includes a third bearing, which is arranged on the rotating shaft at the end of the second bearing away from the first bearing, and the first bearing, the second bearing, the third bearing, the rotating shaft and the mounting sleeve are concentrically arranged.

[0010] By adopting the above technical solution, the cooperation of the first bearing, the second bearing and the third bearing is conducive to further reducing the deflection of the rotating shaft when it rotates along the mounting sleeve. At the same time, it is also conducive to distributing the force generated when the rotating shaft rotates along the mounting sleeve, thereby reducing the probability of damage to the first bearing and / or the second bearing and / or the rotating shaft due to excessive force on the first bearing and / or the second bearing, and playing a positive guiding role in improving the service life of the central shaft.

[0011] Preferably, it also includes a rotation angle limiting component, which includes a limit block and a limit sleeve. The limit sleeve is arranged on the rotating shaft at the end of the third bearing away from the second bearing, and the limit block is arranged on the inner wall of the mounting sleeve. The angle at which the limit sleeve rotates along the mounting sleeve following the rotating shaft is X, and 0°≤X<360°.

[0012] By adopting the above technical solution, through the cooperation of the limiting block and the limiting shaft sleeve, the rotation shaft can move 0 to 360 degrees (including 0 degrees but excluding 360 degrees) along the mounting sleeve.

[0013] Preferably, a flat position is provided on the rotating shaft, and a slot is provided at the geometric center of the limiting sleeve along the thickness direction, and the slot is engaged with the flat position.

[0014] By adopting the above technical solution, the cooperation between the flat position and the slot is conducive to improving the stability of the limit sleeve when installed on the rotating shaft, and reducing the probability of the limit sleeve slipping or loosening along the rotating shaft when the limit sleeve abuts against the limit block due to looseness in the cooperation between the limit sleeve and the rotating shaft.

[0015] Preferably, a limiting assembly is provided on the rotating shaft at one end of the rotating shaft away from the limiting sleeve, and the limiting assembly is used to limit the movement of the limiting sleeve along the rotating shaft.

[0016] By adopting the above technical solution, the limiting sleeve arranged on the rotating shaft is limited by the limiting component, thereby reducing the probability of the limiting sleeve falling off or loosening along the rotating shaft when the limiting sleeve is subjected to the force applied by the limiting block.

[0017] Preferably, the limiting assembly includes a limiting gasket, which is fixed on the rotating shaft and abuts against the surface of the limiting sleeve.

[0018] By adopting the above technical solution, the limiting sleeve is pressed tightly by the limiting gasket, and the installation method is simple.

[0019] Preferably, the limiting assembly further comprises a limiting retaining spring, a retaining spring groove is provided on the rotating shaft at the end of the limiting gasket away from the limiting sleeve, and the retaining spring is clamped in the retaining spring groove.

[0020] By adopting the above technical solution, when the limiting gasket is fixed on the rotating shaft, the limiting retaining spring and the retaining spring groove are used to tighten the limiting gasket, so that the limiting gasket can be in contact with the limiting shaft sleeve, and the mechanical structure is simple and easy to maintain.

[0021] Preferably, the rotation limiting member is configured as a nylon material rotation limiting member.

[0022] By adopting the above technical solution, the nylon material has strong tensile strength and wear resistance, which is beneficial to improving the service life of the rotation limiting part, and the nylon material has good rebound performance. Therefore, when the rotation limiting part is subjected to the force applied by the mounting sleeve, it can be quickly reset, so that the rotation limiting part can always be in contact with the inner wall of the mounting sleeve, which is beneficial to maintaining the resistance of the rotating shaft when rotating along the mounting sleeve.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The cooperation between the first bearing and the second bearing enables the rotating shaft to rotate stably along the mounting sleeve, which plays a positive guiding role in reducing the runout of the rotating shaft when rotating along the mounting sleeve. The rotation limiting member increases the resistance of the rotating shaft when rotating along the mounting sleeve, so that the rotating shaft can only rotate along the mounting sleeve when a certain force is applied to the rotating shaft. This reduces the probability of the rotating shaft rotating too fast along the mounting sleeve due to the low rotational friction between the rotating shaft and the mounting sleeve.

[0025] 2. Through the cooperation of the limit block and the limit shaft sleeve, the shaft can move along the mounting sleeve from 0° to 360° (including 0° but excluding 360°);

[0026] 3. Nylon material has strong tensile strength and wear resistance, which is beneficial to improving the service life of the rotation limiter. Nylon material also has good resilience, so that the rotation limiter can always abut against the inner wall of the mounting sleeve, which is beneficial to maintaining the resistance when the shaft rotates along the mounting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a central axis for a seat according to an embodiment of the present application.

[0028] Figure 2 This is a schematic diagram of the overall structure of the central axis of a seat in an embodiment of the present application, with the mounting sleeve hidden.

[0029] Figure 3 It is a schematic structural diagram of a rotating shaft for the central axis of a seat according to an embodiment of the present application.

[0030] Figure 4 It is a structural schematic diagram of a limiting sleeve for the central axis of a seat according to an embodiment of the present application.

[0031] Explanation of the accompanying drawings: 1. Mounting sleeve; 2. Rotating shaft; 3. Rotating assembly; 31. First bearing; 32. Second bearing; 33. Third bearing; 4. Rotation limiting member; 5. Rotation angle limiting assembly; 51. Limit block; 52. Limiting sleeve; 521. Limiting ring; 522. Limiting protrusion; 6. Flat position; 7. Slot; 8. Limiting assembly; 81. Limiting gasket; 82. Limiting retaining spring; 9. Retaining spring groove; 10. Card table. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiment of the present application discloses a central axis for a seat. Figure 1 and Figure 2 A central axis for a seat includes a mounting sleeve 1, a rotating shaft 2, a rotating assembly 3 and a rotation limiting member 4. The rotating assembly 3 includes a first bearing 31 and a second bearing 32. The first bearing 31 and the second bearing 32 are respectively coaxially fixed with the rotating shaft 2. The rotating shaft 2 is rotatably connected to the mounting sleeve 1 through the first bearing 31 and the second bearing 32. The rotation limiting member 4 is coaxially fixed with the rotating shaft 2. The rotation limiting member 4 is located between the first bearing 31 and the second bearing 32. When the rotating shaft 2 is located in the mounting sleeve 1, the rotation limiting member 4 abuts against the inner wall of the mounting sleeve 1. The rotation limiting member 4 is used to increase the resistance of the rotating shaft 2 when it rotates along the mounting sleeve 1.

[0034] Specifically, the rotating shaft 2 is integrally formed from metal material through machine tool processing to improve the strength of the rotating shaft 2 and reduce the probability of deformation or breakage of the rotating shaft 2. A clamping table 10 is provided on the rotating shaft 2, and the first bearing 31 is installed on the rotating shaft 2 near the clamping table 10. At the same time, the second bearing 32 is installed on the rotating shaft 2 at the end of the first bearing 31 away from the clamping table 10.

[0035] Furthermore, the outer ring tolerances of the mounting sleeve 1 and the first and second bearings 31, 32 are interference fits, enabling the first and second bearings 31, 32 to rotate stably with the mounting sleeve 1. Because the first and second bearings 31, 32 are coaxially fixed and rotationally connected to the mounting sleeve 1, the rotating shaft 2 can rotate stably along the mounting sleeve 1, providing a positive guide to reduce the runout of the rotating shaft 2 as it rotates along the mounting sleeve 1.

[0036] Correspondingly, the rotation restrictor 4 is constructed of nylon, with a circular cross-section. The inner diameter of the rotation restrictor 4 forms an interference fit with the rotating shaft 2, minimizing the likelihood of the rotation restrictor 4 becoming loose when mounted on the rotating shaft 2. Nylon possesses strong tensile strength and wear resistance, which helps extend the service life of the rotation restrictor 4. Nylon also has excellent resilience. Therefore, upon receiving the force applied by the mounting sleeve 1, the rotation restrictor 4 quickly resets, maintaining contact with the inner wall of the mounting sleeve 1 and helping to maintain resistance to the rotation of the rotating shaft 2 along the mounting sleeve 1.

[0037] In another embodiment (not shown in the drawings of the specification), the edge of the rotation limiting member 4 is evenly distributed with a plurality of holes in a ring shape, and the plurality of holes are arranged through the thickness direction of the rotation limiting member 4. The plurality of holes are used to reduce the overall rigidity of the rotation limiting member 4 to a certain extent, so that the rotation limiting member 4 has the characteristic of being easy to deform. After the rotation limiting member 4 is installed on the rotating shaft 2 and the rotating shaft 2 is installed in the mounting sleeve 1, when the rotating shaft 2 carries the rotation limiting member 4 to rotate along the mounting sleeve 1, if the force exerted on the rotation limiting member 4 is too large, the rotation limiting member 4 will be in a deformed state, thereby reducing the resistance of the rotating shaft 2 when rotating along the mounting sleeve 1, and playing a positive guiding role in improving the smoothness of the rotation of the rotating shaft 2 along the mounting sleeve 1.

[0038] Therefore, the resistance of the rotating shaft 2 when rotating along the mounting sleeve 1 is increased by the rotation limiting member 4, so that the rotating shaft 2 can rotate along the mounting sleeve 1 only when a certain force is applied to the rotating shaft 2, thereby reducing the probability of the rotating shaft 2 rotating too fast along the mounting sleeve 1 due to the small rotational friction generated between the rotating shaft 2 and the mounting sleeve 1.

[0039] Reference Figure 2 and Figure 3 The rotating assembly 3 also includes a third bearing 33, which is arranged on the rotating shaft 2 at the end of the second bearing 32 away from the first bearing 31. The first bearing 31, the second bearing 32, the third bearing 33, the rotating shaft 2 and the mounting sleeve 1 are concentrically arranged.

[0040] It should be noted here that the mutual tolerance fitting relationship between the first bearing 31, the second bearing 32, the third bearing 33, the rotating shaft 2 and the mounting sleeve 1 is an interference fit, which is a conventional fitting method for mechanical components. The specific principle will not be elaborated here.

[0041] Therefore, through the cooperation of the first bearing 31, the second bearing 32 and the third bearing 33, it is beneficial to further reduce the deflection of the rotating shaft 2 when it rotates along the mounting sleeve 1, and it is also beneficial to distribute the force generated when the rotating shaft 2 rotates along the mounting sleeve 1, thereby reducing the probability of damage to the first bearing 31 and / or the second bearing 32 and / or the rotating shaft 2 due to excessive force on the first bearing 31 and / or the second bearing 32, and playing a positive guiding role in improving the service life of the center shaft.

[0042] Reference Figure 2 Figure 3 as well as Figure 4 , and also includes a rotation angle limiting component 5, which includes a limit block 51 and a limit sleeve 52. The limit sleeve 52 is arranged on the rotating shaft 2 at the end of the third bearing 33 away from the second bearing 32. The limit block 51 is arranged on the inner wall of the mounting sleeve 1. The angle at which the limit sleeve 52 rotates along the mounting sleeve 1 following the rotating shaft 2 is X, and 0°≤X<360°.

[0043] Specifically, the limiting sleeve 52 includes a limiting ring 521 and a limiting protrusion 522. The limiting protrusion 522 is formed by the limiting ring 521 protruding toward the inner wall of the mounting sleeve 1. The limiting protrusion 522 can be integrally formed with the limiting ring 521 through machine tool processing. The limiting block 51 is located on the inner wall of the mounting sleeve 1 at one end away from the clamping table 10.

[0044] Therefore, when the rotating shaft 2 rotates along the mounting sleeve 1, the limiting ring 521 rotates synchronously with the rotating shaft 2, thereby driving the limiting protrusion 522 to move synchronously with the limiting ring 521. When the limiting protrusion 522 rotates clockwise or counterclockwise in the ultimate state, it abuts against the two sides of the limiting block 51 respectively. Through the cooperation of the limiting block 51 and the limiting shaft sleeve 52, the rotating shaft 2 can move 0° to 360° (including 0° but not including 360°) along the mounting sleeve 1.

[0045] In another embodiment (not shown in the drawings of the specification), the inner wall of the mounting sleeve 1 is not provided with a limit block 51, so that the rotating shaft 2 can rotate at any angle along the mounting platform 1, rather than limiting the rotating shaft 2 to only be able to move along the mounting sleeve 1 within a range of 0° to 360° (including 0° but not including 360°).

[0046] Correspondingly, refer to Figure 3 A flat position 6 is provided on the rotating shaft 2, and a slot 7 is provided at the geometric center of the limiting sleeve 52 along the thickness direction, and the slot 7 is engaged with the flat position 6.

[0047] Specifically, the rotating shaft 2 is symmetrically provided with flat positions 6 from the geometric center of the end face to the edge of the rotating shaft 2. The flat positions 6 are formed by machine tools. At the same time, the slot 7 is formed by the limit ring 521 extending from the geometric center to the edge along the thickness direction. The contour of the slot 7 is adapted to the matching cross-sectional contour of the rotating shaft 2 and the flat position 6. Through the cooperation between the flat position 6 and the slot 7, it is beneficial to improve the stability of the limiting sleeve 52 when installed on the rotating shaft 2, and reduce the probability of the limiting sleeve 52 being loosened when it is in contact with the limiting block 51 due to the looseness of the cooperation between the limiting sleeve 52 and the rotating shaft 2. When the limiting sleeve 52 is subjected to the force applied by the limiting block 51, this force reacts to the rotating shaft 2, resulting in the limiting sleeve 52 slipping or loosening along the rotating shaft 2.

[0048] Reference Figure 2 and Figure 3 A limit assembly 8 is provided on the end of the rotating shaft 2 facing away from the limit sleeve 52. The limit assembly 8 is used to limit the movement of the limit sleeve 52 along the rotating shaft 2. The limit assembly 8 limits the limit sleeve 52 provided on the rotating shaft 2, thereby reducing the probability of the limit sleeve 52 falling off or loosening along the rotating shaft 2 when the limit sleeve 52 is subjected to the force applied by the limit block 51.

[0049] Specifically, the limiting assembly 8 includes a limiting washer 81, which is fixed to the rotating shaft 2 and abuts against the surface of the limiting sleeve 52. The limiting washer 81 is pressed against the limiting sleeve 52, and the installation is simple.

[0050] Furthermore, the limiting assembly 8 also includes a limiting retaining spring 82, and a retaining spring groove 9 is provided on the rotating shaft 2 at the end of the fiber gasket away from the limiting sleeve 52. The retaining spring is clamped in the retaining spring groove 9. When the limiting gasket 81 is fixed on the rotating shaft 2, the limiting gasket 81 is tightened by utilizing the cooperation between the limiting retaining spring 82 and the retaining spring groove 9, so that the limiting gasket 81 can be in contact with the limiting sleeve 52. The mechanical structure is simple and easy to maintain.

[0051] The implementation principle of the central axis of a seat in an embodiment of the present application is as follows: through the cooperation of the first bearing 31, the second bearing 32 and the third bearing 33, it is beneficial to further reduce the deflection of the rotating shaft 2 when it rotates along the mounting sleeve 1, and it is also beneficial to distribute the force generated when the rotating shaft 2 rotates along the mounting sleeve 1, thereby reducing the probability of damage to the first bearing 31 and / or the second bearing 32 and / or the rotating shaft 2 due to excessive force borne by the first bearing 31 and / or the second bearing 32, thereby playing a positive guiding role in improving the service life of the central axis. At the same time, the resistance of the rotating shaft 2 when it rotates along the mounting sleeve 1 is increased by the rotation limiting member 4, so that the rotating shaft 2 can rotate along the mounting sleeve 1 only when a certain force needs to be applied to the rotating shaft 2, thereby reducing the probability of the rotating shaft 2 rotating too fast along the mounting sleeve 1 due to the small rotational friction between the rotating shaft 2 and the mounting sleeve 1.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A center axis for a seat, characterized by: The invention comprises a mounting sleeve (1), a rotating shaft (2), a rotating assembly (3) and a rotation limiting member (4); the rotating assembly (3) comprises a first bearing (31) and a second bearing (32); the first bearing (31) and the second bearing (32) are respectively fixed coaxially with the rotating shaft (2); the rotating shaft (2) is rotationally connected to the mounting sleeve (1) through the first bearing (31) and the second bearing (32); the rotation limiting member (4) is coaxially fixed with the rotating shaft (2), and the rotation limiting member (4) is located between the first bearing (31) and the second bearing (32); when the rotating shaft (2) is located in the mounting sleeve (1), the rotation limiting member (4) abuts against the inner wall of the mounting sleeve (1); the rotation limiting member (4) is used to increase the resistance of the rotating shaft (2) when it rotates along the mounting sleeve (1).

2. The center shaft for a seat according to claim 1, characterized in that: The rotating assembly (3) further comprises a third bearing (33), wherein the third bearing (33) is arranged on the rotating shaft (2) at the end of the second bearing (32) facing away from the first bearing (31), and the first bearing (31), the second bearing (32), the third bearing (33), the rotating shaft (2) and the mounting sleeve (1) are concentrically arranged.

3. The center shaft for a seat according to claim 2, characterized in that: The invention also includes a rotation angle limiting component (5), wherein the rotation angle limiting component (5) includes a limit block (51) and a limit sleeve (52), wherein the limit sleeve (52) is arranged on the rotating shaft (2) at one end of the third bearing (33) away from the second bearing (32), and the limit block (51) is arranged on the inner wall of the mounting sleeve (1). The limit sleeve (52) rotates along the mounting sleeve (1) following the rotating shaft (2), and the angle X at which the limit sleeve (52) rotates is 0°≤X<360°.

4. The center shaft for a seat according to claim 3, characterized in that: The rotating shaft (2) is provided with a flat position (6), and the limiting sleeve (52) is provided with a clamping groove (7) at the geometric center along the thickness direction, and the clamping groove (7) is clamped and matched with the flat position (6).

5. The center shaft for a seat according to claim 4, characterized in that: A limiting assembly (8) is provided on the rotating shaft (2) at one end of the rotating shaft (2) away from the limiting sleeve (52), and the limiting assembly (8) is used to limit the movement of the limiting sleeve (52) along the rotating shaft (2).

6. The center shaft for a seat according to claim 5, characterized in that: The limiting assembly (8) comprises a limiting gasket (81), the limiting gasket (81) is fixed on the rotating shaft (2), and the limiting gasket (81) abuts against the surface of the limiting shaft sleeve (52).

7. The center shaft for a seat according to claim 6, characterized in that: The limiting assembly (8) further includes a limiting retaining spring (82), a retaining spring groove (9) is provided on the rotating shaft (2) at the end of the limiting gasket (81) away from the limiting sleeve (52), and the retaining spring is engaged in the retaining spring groove (9).

8. The center shaft for a seat according to claim 1, characterized in that: The rotation limiting member (4) is configured as a nylon material rotation limiting member (4).

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