CN212546288U - Rotating spindle capable of automatically returning - Google Patents
Rotating spindle capable of automatically returning Download PDFInfo
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- CN212546288U CN212546288U CN202021433916.3U CN202021433916U CN212546288U CN 212546288 U CN212546288 U CN 212546288U CN 202021433916 U CN202021433916 U CN 202021433916U CN 212546288 U CN212546288 U CN 212546288U
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- sleeve
- bearing
- rotating shaft
- spiral surface
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Abstract
The utility model discloses a rotary main shaft capable of automatically returning, which comprises a sleeve, a rotary shaft penetrating through the sleeve, a first bearing and a second bearing sleeved on the upper and lower ends of the rotary shaft and installed in the sleeve, a spring sleeved on the periphery of the rotary shaft and arranged in the sleeve, and a cam assembly installed between the lower end of the rotary shaft and the sleeve, wherein the spring is arranged between the first bearing and the cam assembly; the upper cam lower end molding has two first helicoids and two second helicoids which are distributed and connected in an opposite insertion way and correspond to the first helicoids and the second helicoids, and the lower cam upper end molding has two third helicoids and two fourth helicoids which are distributed and connected in an opposite insertion way and are respectively butted with the first helicoids and the second helicoids.
Description
The technical field is as follows:
the utility model relates to a rotating main shaft product technical field refers in particular to a rotating main shaft that can playback automatically.
Background art:
the swivel chair is the most common furniture in public places such as offices, internet bars and the like, and can be conveniently lifted and rotated to meet the use requirements of personnel. Especially, the chair can be rotated to different directions by sitting on the chair, thereby being very convenient. The rotation function of the existing swivel chair is realized through the rotating shaft, and after the swivel chair rotates, a human body leaves and can be kept in the rotating direction, and the swivel chair cannot automatically rotate to a set position. Therefore, the directions of the swivel chairs in public places such as the whole office, an internet bar and the like are convenient, and particularly in a conference room, the chairs are generally required to face a conference table to be kept orderly, so that personnel are required to specially turn the chairs to the conference table after the swivel chairs are used every time, and the swivel chairs are troublesome and waste manpower.
In view of the above, the present inventors propose the following.
The utility model has the following contents:
an object of the utility model is to overcome prior art's not enough, provide a rotatory main shaft that can automatic playback.
In order to solve the technical problem, the utility model discloses a following technical scheme: the rotating main shaft capable of automatically returning comprises a sleeve, a rotating shaft penetrating through the sleeve, a first bearing and a second bearing which are sleeved at the upper end and the lower end of the rotating shaft and are arranged in the sleeve, a spring which is sleeved at the periphery of the rotating shaft and is arranged in the sleeve, and a cam assembly which is arranged between the lower end of the rotating shaft and the sleeve, wherein the spring is arranged between the first bearing and the cam assembly; the upper cam lower end molding has two first helicoids and two second helicoids which are distributed and connected in an opposite insertion way and correspond to the first helicoids and the second helicoids, and the lower cam upper end molding has two third helicoids and two fourth helicoids which are distributed and connected in an opposite insertion way and are respectively butted with the first helicoids and the second helicoids.
Further, in the above technical solution, one end of the first spiral surface, which is in butt joint with the second spiral surface, is a first convex arc surface, and the other end is a first concave arc surface; and one end of the third spiral surface, which is in butt joint with the fourth spiral surface, is a second convex cambered surface, and the other end of the third spiral surface is a second concave cambered surface.
Furthermore, in the above technical solution, a plane bearing is further sleeved at the lower end of the rotating shaft, and the plane bearing is located between the lower cam and the second bearing.
Furthermore, in the above technical solution, the cross section of the lower cam is polygonal, a polygonal installation position is provided in the sleeve, and the lower cam is inserted into the installation position.
Further, in the above technical solution, at least one flat groove surface is disposed on the periphery of the rotating shaft, and a plane corresponding to the flat groove surface is disposed on the wall of the second through hole in the upper cam.
Further, in the above technical solution, a flange is formed at the upper end of the rotating shaft, and the first bearing is fixed at the upper end of the rotating shaft by a first C-shaped retaining ring matching with the flange; the second bearing is fixed at the lower end of the rotating shaft through a second C-shaped retaining ring, a screw and a gasket; and the upper end and the lower end of the rotating shaft are respectively provided with a first clamping groove and a second clamping groove for clamping the first C-shaped retaining ring and the second C-shaped retaining ring.
Further, in the above technical solution, a first cam portion is formed in the upper cam, a fifth helicoid and a sixth helicoid are formed at a lower end of the first cam portion, and are symmetrically distributed and connected, and the fifth helicoid and the sixth helicoid are distributed across the first helicoid and the second helicoid; a second cam part is formed in the lower cam, a seventh spiral surface and an eighth spiral surface which are symmetrically distributed and connected are formed at the upper end of the second cam part, and the seventh spiral surface and the eighth spiral surface are distributed with the third spiral surface and the fourth spiral surface in a crossed manner; and the seventh helicoid and the eighth helicoid are respectively butted with the fifth helicoid and the sixth helicoid.
Furthermore, in the above technical scheme, the upper and lower both ends of the sleeve are provided with a first mounting groove and a second mounting groove respectively at the openings, and the first bearing and the second bearing are fixed in the first mounting groove and the second mounting groove respectively.
After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: adopt the utility model discloses the realization that the swivel chair that makes can be stable rotates the function to after the seat support that the personnel left the swivel chair, this seat support passes through the utility model discloses can realize automatic playback, get back to the initial condition before rotating, in order keeping neatly, solved all need personnel to turn to the seat support specially after using the swivel chair at every turn, relatively troublesome problem of extravagant manpower again. Because the utility model discloses a double cam structure that cam and lower cam constitute makes the utility model discloses structural stability is stronger to can guarantee that the pivot rotates more smoothly, steady, and wear and tear littleer, improve life and quality, order the utility model discloses extremely strong market competition has.
Description of the drawings:
fig. 1 is a perspective view of a first embodiment of the present invention;
fig. 2 is a perspective view of another perspective view of an embodiment of the present invention;
fig. 3 is an exploded perspective view of a first embodiment of the present invention;
fig. 4 is a perspective view of the embodiment of the present invention after the sleeve is removed;
fig. 5 is a perspective view of an upper cam in a first embodiment of the present invention;
fig. 6 is a perspective view of a lower cam in the first embodiment of the present invention;
fig. 7 is a sectional view of a second embodiment of the present invention;
fig. 8 is an exploded perspective view of a second embodiment of the present invention;
fig. 9 is a perspective view of the upper cam in the second embodiment of the present invention;
fig. 10 is a perspective view of a lower cam in the second embodiment of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
The first embodiment is as follows:
referring to fig. 1 to 6, a rotating spindle capable of automatically returning to a home position includes a sleeve 1, a rotating shaft 2 penetrating through the sleeve 1, a first bearing 3 and a second bearing 4 sleeved at upper and lower ends of the rotating shaft 2 and installed in the sleeve 1, a spring 5 sleeved at the periphery of the rotating shaft 2 and installed in the sleeve 1, and a cam assembly 600 installed between the lower end of the rotating shaft 2 and the sleeve 1, wherein the spring 5 is installed between the first bearing 3 and the cam assembly 600, the cam assembly 600 includes an upper cam 6 axially slidably sleeved at the periphery of the rotating shaft 2 and capable of rotating with the rotating shaft 2, and a lower cam 7 fixed inside the sleeve 1 and adapted to the upper cam 6, and the lower end of the rotating shaft 2 passes through a first through hole 70 of the lower cam 7; the lower end of the upper cam 6 is formed with two first helicoids 61 and two second helicoids 62 which are distributed and connected in an opposite insertion way, and correspondingly, the upper end of the lower cam 7 is formed with two third helicoids 71 and two fourth helicoids 72 which are distributed and connected in an opposite insertion way and are respectively butted with the first helicoids 61 and the second helicoids 62. The utility model discloses install between the seat support and the chassis of swivel chair, when personnel sat on the seat support and rotated, this pivot 2 carried out stable rotation in sleeve 1, and this pivot 2 can drive cam 6 synchronous rotation when rotating, because this lower cam 7 is fixed in this sleeve 1, third helicoid 71 and fourth helicoid 72 of this lower cam 7 upper end respectively with go up first helicoid 61 and second helicoid 62 butt joint of cam 6, so that this upper cam 6 can be forced upwards to carry out axial slip when rotating, at this moment, this spring 5 was compressed; when a person leaves the chair seat, the spring 5 is reset to drive the upper cam 6 to slide downwards axially, and the upper cam 6 forces the rotating shaft 2 to rotate to an initial state under the action of the first spiral surface 61 and the second spiral surface 62 of the upper cam 6 and the third spiral surface 71 and the fourth spiral surface 72 at the upper end of the lower cam 7, so that the aim of driving the rotating shaft 2 to automatically reset is fulfilled; that is to say, adopt the utility model discloses the realization that the swivel chair of making can be stable rotates the function to after the seat support that the personnel left the swivel chair, this seat support passes through the utility model discloses can realize automatic playback, get back to the initial condition before rotating, in order to keep neat, solved all need personnel to turn to the seat support specially after using the swivel chair at every turn, the problem of more troublesome extravagant manpower again. Because the utility model discloses a double cam structure that upper cam 6 and lower cam 7 constitute makes the utility model discloses structural stability is stronger to can guarantee that the pivot rotates more smoothly, steady, and wear is littleer, improves life and quality, the order the utility model discloses extremely strong market competition has.
One end of the first spiral surface 61, which is in butt joint with the second spiral surface 62, is a first convex arc surface, and the other end of the first spiral surface is a first concave arc surface; the butt joint end of the third spiral surface 71 and the fourth spiral surface 72 is a second convex arc surface, and the other end is a second concave arc surface, so that the assembly structure of the upper cam 6 and the lower cam 7 is more stable, and the assembly structure can be smoothly started to rotate.
The lower extreme of 2 pivots is still overlapped and is equipped with flat bearing 8, and this flat bearing 8 is located between this lower cam 7 and the second bearing 4, and this flat bearing 8 can increase the equilibrium power, makes the utility model discloses the operation is got up more stably, improves operating mass.
The cross section of the lower cam 7 is polygonal, a polygonal installation position is arranged in the sleeve 1, and the lower cam 7 is inserted into the installation position to ensure that the lower cam 7 is stably installed in the sleeve 1.
At least one flat groove surface 21 is arranged on the periphery of the rotating shaft 2, and a plane 601 corresponding to the flat groove surface 21 is arranged on the hole wall of the second through hole 60 in the upper cam 6, so that the upper cam 6 can axially slide relative to the rotating shaft 2 and can rotate along with the rotation of the rotating shaft 2.
A flange 22 is formed at the upper end of the rotating shaft 2, and the first bearing 3 is fixed at the upper end of the rotating shaft 2 through a first C-shaped retaining ring 31 matched with the flange 22; the second bearing 4 is fixed at the lower end of the rotating shaft 2 through a second C-shaped retaining ring 41, a screw 23 and a gasket 24; the upper end and the lower end of the rotating shaft 2 are respectively provided with a first clamping groove 25 and a second clamping groove 26 for clamping the first C-shaped retaining ring 31 and the second C-shaped retaining ring 41.
The sleeve is characterized in that a first mounting groove 11 and a second mounting groove 12 are respectively arranged at openings at the upper end and the lower end of the sleeve 1, and the first bearing 3 and the second bearing 4 are respectively fixed in the first mounting groove 11 and the second mounting groove 12.
To sum up, the utility model discloses install between the seat support and the chassis of swivel chair, when personnel sat on the seat support and rotated, this pivot 2 carried out stable rotation in sleeve 1, and this pivot 2 can drive cam 6 synchronous rotation when rotating, because this lower cam 7 is fixed in this sleeve 1, third helicoid 71 and fourth helicoid 72 of this lower cam 7 upper end respectively with first helicoid 61 and second helicoid 62 butt joint of upper cam 6, so that this upper cam 6 can be forced to carry out axial slip upwards when rotating, at this moment, this spring 5 was compressed; when a person leaves the chair seat, the spring 5 is reset to drive the upper cam 6 to slide downwards axially, and the upper cam 6 forces the rotating shaft 2 to rotate to an initial state under the action of the first spiral surface 61 and the second spiral surface 62 of the upper cam 6 and the third spiral surface 71 and the fourth spiral surface 72 at the upper end of the lower cam 7, so that the aim of driving the rotating shaft 2 to automatically reset is fulfilled; that is to say, adopt the utility model discloses the realization that the swivel chair of making can be stable rotates the function to after the seat support that the personnel left the swivel chair, this seat support passes through the utility model discloses can realize automatic playback, get back to the initial condition before rotating, in order to keep neat, solved all need personnel to turn to the seat support specially after using the swivel chair at every turn, the problem of more troublesome extravagant manpower again. Because the utility model discloses a double cam structure that upper cam 6 and lower cam 7 constitute makes the utility model discloses structural stability is stronger to can guarantee that the pivot rotates more smoothly, steady, and wear is littleer, improves life and quality, the order the utility model discloses extremely strong market competition has.
Example two:
the second embodiment is different from the first embodiment in that: in the second embodiment, the upper cam 6 and the lower cam 7 are improved on the basis of the first embodiment, specifically, the following steps are performed: as shown in fig. 7-10, a first cam part 65 is formed in the upper cam 6, a fifth helical surface 66 and a sixth helical surface 67 are formed at the lower end of the first cam part 65, symmetrically distributed and connected, and the fifth helical surface 66 and the sixth helical surface 67 are distributed across the first helical surface 61 and the second helical surface 62; a second cam part 75 is formed in the lower cam 7, a seventh spiral surface 76 and an eighth spiral surface 77 are formed at the upper end of the second cam part 75, the seventh spiral surface 76 and the eighth spiral surface 77 are symmetrically distributed and connected, and the seventh spiral surface 76 and the eighth spiral surface 77 are distributed in a way of crossing the third spiral surface 71 and the fourth spiral surface 72; and this seventh helicoid 76 and eighth helicoid 77 respectively with the butt joint of fifth helicoid 66 and sixth helicoid 67 to this can make upper cam 6 and lower cam 7 assemble more stably, and more balanced, laborsaving, make the utility model discloses the operation is more smooth and easy.
Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. The utility model provides a but rotatory main shaft of automatic homing, it includes sleeve (1), wear to locate pivot (2) in this sleeve (1), both ends about this pivot (2) are located to the cover and install first bearing (3) and second bearing (4) in this sleeve (1), the cover is located this pivot (2) periphery and is placed in spring (5) in this sleeve (1) and install cam pack (600) between this pivot (2) lower extreme and sleeve (1), this spring (5) are placed in between this first bearing (3) and cam pack (600), its characterized in that:
the cam assembly (600) comprises an upper cam (6) which is sleeved on the periphery of the rotating shaft (2) in an axial sliding mode and can rotate along with the rotating shaft (2) and a lower cam (7) which is fixed in the sleeve (1) and matched with the upper cam (6), and the lower end of the rotating shaft (2) penetrates through a first through hole (70) of the lower cam (7); the lower end of the upper cam (6) is provided with a first helical surface (61) and a second helical surface (62) which are distributed in an opposite insertion way and connected, and correspondingly, the upper end of the lower cam (7) is provided with a third helical surface (71) and a fourth helical surface (72) which are distributed in an opposite insertion way and connected with the first helical surface (61) and the second helical surface (62) in an opposite insertion way and butted with each other.
2. An automatically homing, rotating spindle according to claim 1, characterized in that: one end of the first spiral surface (61) which is in butt joint with the second spiral surface (62) is a first convex arc surface, and the other end of the first spiral surface is a first concave arc surface; one end of the third spiral surface (71) which is in butt joint with the fourth spiral surface (72) is a second convex arc surface, and the other end of the third spiral surface is a second concave arc surface.
3. An automatically homing, rotating spindle according to claim 1, characterized in that: the lower end of the rotating shaft (2) is further sleeved with a plane bearing (8), and the plane bearing (8) is located between the lower cam (7) and the second bearing (4).
4. An automatically homing, rotating spindle according to claim 1, characterized in that: the cross section of the lower cam (7) is polygonal, a polygonal installation position is arranged in the sleeve (1), and the lower cam (7) is inserted in the installation position.
5. An automatically homing, rotating spindle according to claim 1, characterized in that: at least one flat groove surface (21) is arranged on the periphery of the rotating shaft (2), and a plane (601) corresponding to the flat groove surface (21) is arranged on the hole wall of the second through hole (60) in the upper cam (6).
6. An automatically homing, rotating spindle according to claim 1, characterized in that: a flange (22) is formed at the upper end of the rotating shaft (2), and the first bearing (3) is fixed at the upper end of the rotating shaft (2) through a first C-shaped retaining ring (31) matched with the flange (22); the second bearing (4) is fixed at the lower end of the rotating shaft (2) through a second C-shaped retaining ring (41), a screw (23) and a gasket (24); and the upper end and the lower end of the rotating shaft (2) are respectively provided with a first clamping groove (25) and a second clamping groove (26) for clamping a first C-shaped retaining ring (31) and a second C-shaped retaining ring (41).
7. An automatically homing spindle according to any one of claims 1 to 6, wherein: a first cam part (65) is formed in the upper cam (6), a fifth helical surface (66) and a sixth helical surface (67) which are symmetrically distributed and connected are formed at the lower end of the first cam part (65), and the fifth helical surface (66) and the sixth helical surface (67) are distributed in a crossing way with the first helical surface (61) and the second helical surface (62); a second cam part (75) is formed in the lower cam (7), a seventh spiral surface (76) and an eighth spiral surface (77) which are symmetrically distributed and connected are formed at the upper end of the second cam part (75), and the seventh spiral surface (76) and the eighth spiral surface (77) are distributed in a crossed manner with the third spiral surface (71) and the fourth spiral surface (72); and the seventh helicoid (76) and the eighth helicoid (77) are butted with the fifth helicoid (66) and the sixth helicoid (67), respectively.
8. An automatically homing, rotating spindle according to claim 7, characterized in that: the sleeve is characterized in that a first mounting groove (11) and a second mounting groove (12) are respectively arranged at openings at the upper end and the lower end of the sleeve (1), and the first bearing (3) and the second bearing (4) are respectively fixed in the first mounting groove (11) and the second mounting groove (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021433916.3U CN212546288U (en) | 2020-07-20 | 2020-07-20 | Rotating spindle capable of automatically returning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021433916.3U CN212546288U (en) | 2020-07-20 | 2020-07-20 | Rotating spindle capable of automatically returning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212546288U true CN212546288U (en) | 2021-02-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021433916.3U Active CN212546288U (en) | 2020-07-20 | 2020-07-20 | Rotating spindle capable of automatically returning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212546288U (en) |
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2020
- 2020-07-20 CN CN202021433916.3U patent/CN212546288U/en active Active
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