CN214341241U - Screw rod precession mechanism - Google Patents
Screw rod precession mechanism Download PDFInfo
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- CN214341241U CN214341241U CN202120518124.4U CN202120518124U CN214341241U CN 214341241 U CN214341241 U CN 214341241U CN 202120518124 U CN202120518124 U CN 202120518124U CN 214341241 U CN214341241 U CN 214341241U
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Abstract
The utility model discloses a screw rod precession mechanism, which comprises a screw rod driving seat and a push-pull screw rod, wherein a screw rod rotating seat is rotatably assembled on the screw rod driving seat, a screw rod perforation is penetrated on the screw rod rotating seat, the push-pull screw rod is penetrated in the screw rod perforation, the push-pull screw rod is axially matched with the screw rod rotating seat in a sliding way, and the push-pull screw rod and the screw rod rotating seat are annularly fixed; and a rotating nut is also fixed on the screw driving seat and is sleeved on the push-pull screw in a threaded manner. Adopt the present case show the effect be, push-and-pull screw passes through screw rod swivel mount drive and keeps rotatory, thereby push-and-pull screw can advance or retreat with the cooperation of precession nut simultaneously, and push-and-pull screw can axial displacement and hoop rotate simultaneously, is convenient for link with other parts, has the advantage that the structure is retrencied, practice thrift the cost.
Description
Technical Field
The utility model relates to a functional structure of seat, concretely relates to synchronous sharp propulsion and rotating member suitable for all kinds of seats.
Background
Office chairs are important office furniture. Along with the demand of office crowd to office chair travelling comfort constantly increases, office chair is constantly developing to multi-functional direction gradually. At the present stage, the multifunctional office chair mainly needs to meet the following requirements besides meeting the requirements of people for sitting:
1. the seat backrest can be inclined, and the inclined angle can be adjusted and fixed so as to meet different lying requirements of passengers, such as half lying or full lying;
2. the seat cushion of the seat can be turned over by a certain angle, so that the front part of the seat cushion is upward and the rear part of the seat cushion is downward, and the knees of a passenger are raised to different degrees;
3. when the passenger has a rest, the legs can be supported by the leg supports, so that the comfort is improved.
In addition, some seats are required to have a headrest, a leg rest, and even a seat cushion or a backrest with a telescopic sliding function so that the headrest or the backrest can be adjusted up and down, or the seat cushion can be adjusted back and forth, or the leg rest can be extended back and forth so as to be close to or away from the seat cushion.
In order to meet the above requirements, engineers in related fields have partial research results, and can meet corresponding requirements independently. However, due to lack of overall planning, on one hand, the structure adopted by the prior art is not simplified enough, and on the other hand, after the functions are combined by adopting the prior art, the office chair has a complex and bloated structure, and the structures corresponding to the functions are seriously interfered with each other, so that the office chair has the defects of heavy weight, insufficient aesthetic property and the like. Therefore, it is necessary to plan the implementation of each requirement as a whole again to integrate the functions. During the integration process, various structural members and linkage relations need to be planned and designed again.
In the prior art, when a power device is adopted to push components such as a headrest, a leg support and the like to move linearly, only a single motion mode is provided, and linkage with other components is avoided, so that reconsideration needs to be performed from the perspective of simplifying the structure and saving the cost.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a screw precession mechanism capable of providing linear propulsion and simultaneously achieving output rotation function.
The technical scheme is as follows:
the utility model provides a screw rod precession mechanism which the key lies in: the screw rod driving device comprises a screw rod driving seat and a push-pull screw rod, wherein a screw rod rotating seat is rotatably assembled on the screw rod driving seat, a screw rod through hole penetrates through the screw rod rotating seat, the push-pull screw rod is arranged in the screw rod through hole in a penetrating manner, the push-pull screw rod is in axial sliding fit with the screw rod rotating seat, and the push-pull screw rod and the screw rod rotating seat are fixed annularly;
and a rotating nut is also fixed on the screw driving seat and is sleeved on the push-pull screw in a threaded manner.
The beneficial effect who adopts above scheme: the push-and-pull screw rod keeps rotating through the drive of the screw rod swivel mount, and simultaneously the push-and-pull screw rod can move forward or retreat with the cooperation of the rotating nut, and the push-and-pull screw rod can move axially and rotate annularly at the same time, is convenient to link with other components, and has the advantages of simple structure and cost saving.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of portion B of FIG. 1;
FIG. 3 is a schematic structural view of example 2;
FIG. 4 is a view showing the installation relationship between the leg rest body 3 and the leg rest linear drawing assembly;
FIG. 5 is a cross-sectional view Z-Z' of FIG. 4;
FIG. 6 is a cross-sectional view of Y-Y' of FIG. 4;
FIG. 7 is an enlarged view of portion A of FIG. 5;
fig. 8 is a schematic structural view of the friction reducing pad 103.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
Example 1:
as shown in fig. 1-8: a screw precession mechanism comprises a screw driving seat 21 and a push-pull screw 22, wherein a screw rotating seat 23 is rotatably assembled on the screw driving seat 21, the screw rotating seat 23 is installed on the screw driving seat 21 through a bearing seat, a screw perforation 23a penetrates through the screw rotating seat 23, the push-pull screw 22 penetrates through the screw perforation 23a, the push-pull screw 22 is axially matched with the screw rotating seat 23 in a sliding manner, and the push-pull screw 22 and the screw rotating seat 23 are annularly fixed;
still be equipped with power element 26 on screw rod drive seat 21, power element 26 is the motor be equipped with the worm wheel on screw rod swivel mount 23, the motor output shaft with the transmission is connected between the worm wheel.
A nut support 25 is further fixed on the screw driving seat 21, a rotating nut 24 is further fixed on the screw driving seat 21, and the rotating nut 24 is sleeved on the push-pull screw 22 in a threaded manner.
A sliding concave part is arranged on the outer wall of the push-pull screw rod 22 along the axial direction of the push-pull screw rod, the sliding concave part separates threads of the push-pull screw rod 22, a sliding convex part is fixed on the wall of the through hole of the screw rod, and the sliding convex part corresponds to the sliding concave part and is matched with the sliding concave part; the sliding protruding part is in axial sliding fit with the sliding recessed part, and the sliding protruding part is axially and annularly fixed with the sliding recessed part.
Specifically, a sliding plane is provided on the outer wall of the push-pull screw 22 along the axial direction thereof, the sliding plane separates the threads of the push-pull screw 22, and a sliding protrusion is fixed on the hole wall of the screw through hole 23a and abuts against the sliding plane.
Example 2:
as shown in fig. 1-8: the screw precession mechanism in the embodiment 1 is applied to a leg support to obtain a one-step expansion type leg support, which includes a seat cushion 1, wherein a leg support body 3 is arranged at the front part of the seat cushion 1, a leg support linear drawing assembly is mounted on the seat cushion 1, the leg support linear drawing assembly includes a drawing fixed part and a drawing sliding part which are slidably assembled along the front-back direction of the seat cushion 1, the drawing fixed part is arranged on the seat cushion 1, the front part of the drawing sliding part is hinged with the leg support body 3, and the drawing sliding part drives the leg support body 3 to advance and retreat along the drawing fixed part; and a secondary propelling mechanism is arranged on the drawing sliding part and connected with the leg support body 3, and the secondary propelling mechanism pushes the leg support body 3 to rotate.
Specifically, the method comprises the following steps: the drawing sliding part comprises a leg support sliding seat and a push-pull screw rod 22, the leg support sliding seat is assembled with the drawing fixing part in a sliding mode, the push-pull screw rod 22 is fixedly connected with the leg support sliding seat in the axial direction, the push-pull screw rod 22 is connected with the leg support sliding seat in the circumferential direction in a rotating mode, the push-pull screw rod 22 is connected with a screw rotating mechanism, the screw rotating mechanism comprises a screw driving seat 21 and a screw rotating seat 23, the screw driving seat 21 and the seat cushion 1 are kept fixed relatively, the screw rotating seat 23 is installed on the screw driving seat 21 through a bearing seat, a screw penetrating hole penetrates through the screw rotating seat 23, the push-pull screw rod 22 penetrates through the screw penetrating hole, the push-pull screw rod 22 is in sliding fit with the screw rotating seat 23 in the axial direction, and the screw body 22 is fixed with the screw rotating seat 23 in the circumferential direction. As a more specific embodiment, a sliding recessed portion is provided on the outer wall of the push-pull screw 22 along the axial direction thereof, the sliding recessed portion partitions the thread of the push-pull screw 22, a sliding protruding portion is fixed on the wall of the screw through hole, and the sliding protruding portion corresponds to and matches with the sliding recessed portion; the sliding protruding part is in axial sliding fit with the sliding recessed part, and the sliding protruding part is axially and annularly fixed with the sliding recessed part. Thereby, the screw rotating mechanism drives the push-pull screw 22 to rotate;
the seat cushion further comprises a rotating nut 24, the rotating nut 24 is relatively fixed with the seat cushion 1, and the rotating nut 24 is sleeved on the push-pull screw rod 22 in a threaded manner;
the secondary propelling mechanism comprises a propelling block 27, the propelling block 27 is assembled with the leg support sliding seat in a sliding mode, the propelling block 27 is in threaded sleeve connection with the push-pull screw rod 22, a turning connecting rod 29 is connected between the propelling block 27 and the leg support body 3, and two ends of the turning connecting rod 29 are hinged to the propelling block 27 and the leg support body 3 respectively.
The leg support sliding seat comprises a sliding inner tube 102, the push-pull screw rod 22 is located inside the sliding inner tube 102 and parallel to the length direction of the sliding inner tube, sealing seats are fixed at two ends of the sliding inner tube 102, two ends of the push-pull screw rod 22 are respectively installed on the corresponding sealing seats, the end portion of the push-pull screw rod 22 is fixedly connected with the corresponding sealing seats in the axial direction, the end portion of the push-pull screw rod 22 is connected with the corresponding sealing seats in an annular rotating mode, a leg support installation seat is arranged at the front end of the sliding inner tube 102, and the leg support body 3 is hinged to the leg support installation seat.
The screw rod rotating seat 23, the rotating nut 24 and the pushing block 27 are all located inside the sliding inner tube 102, the pushing block 27 is embedded in the sliding inner tube 102 in a sliding mode, and the pushing block 27 is located in front of the screw rod rotating seat 23 and the rotating nut 24.
The drawing and fixing part comprises a guide outer cylinder 101, the guide outer cylinder 101 is fixed on the seat cushion 1, the guide outer cylinder 101 is arranged along the front and back direction of the seat cushion 1, and the sliding inner pipe 102 is movably inserted in the guide outer cylinder 101;
to reduce the sliding friction of the sliding inner tube 102 in the guide outer cylinder 101: a friction reducing pad 103 is arranged between the guide outer cylinder 101 and the sliding inner tube 102, the outer wall of the friction reducing pad 103 is abutted against the inner wall of the guide outer cylinder 101, the outer wall of the friction reducing pad 103 is provided with a positioning bump 103a, a friction reducing pad clamping hole penetrates through the cylinder wall of the guide outer cylinder 101, the friction reducing pad clamping hole corresponds to the positioning bump 103a and is sleeved with the positioning bump 103a in a penetrating manner, the inner wall of the friction reducing pad 103 is provided with a plurality of friction reducing convex strips 103b, and the friction reducing convex strips 103b are abutted against the inner wall of the sliding inner tube 102; the guide outer cylinder 101 and the sliding inner tube 102 are rectangular tubes, the friction reducing pads 103 are in a C shape, the number of the friction reducing pads 103 is two, the two friction reducing pads 103 are arranged oppositely, and the edges of the two friction reducing pads 103 are spaced from each other.
A driving abdicating hole penetrates through the wall of the guide outer cylinder 101, a strip-shaped sliding abdicating hole is arranged on the sliding inner tube 102 along the length direction, the driving abdicating hole corresponds to and is communicated with the sliding abdicating hole, the screw driving seat 21 sequentially extends into the sliding inner tube 102 from the driving abdicating hole and the sliding abdicating hole, a nut support 25 is further fixed on the screw driving seat 21, the turning nut 24 is fixed on the nut support 25, the pushing block 27 comprises a pushing slide block 271 and a pushing arm 272, the pushing slide block 271 is movably embedded in the sliding inner tube 102, the pushing slide block 271 is threadedly sleeved on the push-pull screw 22, a strip-shaped pushing abdicating hole is also arranged on the guide outer cylinder 101 along the length direction, the pushing abdicating hole corresponds to and is communicated with the sliding abdicating hole, the pushing arm 272 is obliquely arranged, the upper end of the propelling arm 272 is fixed with the propelling slider 271, the lower part of the propelling arm 272 sequentially extends out of the sliding abdicating hole and the propelling abdicating hole, and the lower end of the propelling arm 272 faces the leg support body 3 and is hinged with the turnover connecting rod 29.
The screw driving seat 21 is fixed on the outer wall of the guide outer cylinder 101, a power element 26 is further arranged on the screw driving seat 21, the power element 26 can be a motor, a worm wheel is fixedly sleeved on the screw rotating seat, and an output shaft of the motor is in transmission connection with the worm wheel. Therefore, when the output shaft of the motor rotates, the push-pull screw rod 22 is driven to rotate; while the push-pull screw rod 22 rotates, due to the threaded fit with the rotating nut 24, the push-pull screw rod 22 extends back and forth along the rotating nut 24, so that the sliding inner tube 102 is driven to slide back and forth in the guide outer cylinder 101, and the friction reducing convex strips 103b can reduce the sliding contact area, thereby reducing the friction force; the leg rest body 3 installed at the front end of the sliding inner tube 102 is driven to be extended and contracted forward and backward so that the leg rest is moved into/out of the seat. The push-pull screw 22 and other parts are arranged in the sliding inner tube 102, so that the appearance is simple and attractive, and the modular design is convenient for assembly and combination.
The turning connecting rod 29 is located below a hinge point of the leg rest body 3 and the leg rest mounting seat, when the push-pull screw rod 22 drives the sliding inner tube 102 to slide back and forth, the pushing block 27 advances and retreats along with the sliding inner tube, the push-pull screw rod 22 keeps rotating in the process, the pushing block 27 is driven to slide back and forth relative to the push-pull screw rod 22, and therefore the leg rest body 3 is pushed to turn. Therefore, when the leg rest body 3 is driven to move forwards out of the seat, the leg rest body 3 is turned over and spread to be in a use state in one step; while the leg support body 3 is driven to move backwards into the seat, the leg support body 3 is turned and erected into a standby state in one step; the efficiency is improved and the time is saved by adopting a simple structure.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.
Claims (6)
1. The utility model provides a screw rod precession mechanism which characterized in that: the device comprises a screw driving seat (21) and a push-pull screw (22), wherein a screw rotating seat (23) is rotatably assembled on the screw driving seat (21), a screw through hole (23a) penetrates through the screw rotating seat (23), the push-pull screw (22) is arranged in the screw through hole (23a) in a penetrating manner, the push-pull screw (22) is in axial sliding fit with the screw rotating seat (23), and the push-pull screw (22) and the screw rotating seat (23) are fixed annularly;
a rotating nut (24) is further fixed on the screw driving seat (21), and the rotating nut (24) is sleeved on the push-pull screw (22) in a threaded manner.
2. The screw precession mechanism of claim 1, wherein: the outer wall of the push-pull screw (22) is provided with a sliding concave part along the axial direction, the sliding concave part separates threads of the push-pull screw (22), a sliding convex part is fixed on the wall of the through hole of the screw, and the sliding convex part corresponds to the sliding concave part and is matched with the sliding concave part;
the sliding protruding part is in axial sliding fit with the sliding recessed part, and the sliding protruding part is axially and annularly fixed with the sliding recessed part.
3. The screw precession mechanism of claim 1, wherein: and a nut support (25) is also fixed on the screw driving seat (21), and the rotating nut (24) is fixed on the nut support (25).
4. The screw precession mechanism of claim 1, wherein: screw rod swivel mount (23) are installed through the bearing frame on screw rod drive seat (21) still be equipped with power original piece (26) on screw rod drive seat (21), power original piece (26) with screw rod swivel mount (23) transmission is connected.
5. The screw precession mechanism of claim 2, wherein: the outer wall of the push-pull screw rod (22) is provided with a sliding plane along the axial direction, the sliding plane separates threads of the push-pull screw rod (22), and a sliding lug is fixed on the hole wall of the screw rod through hole (23a) and is abutted against the sliding plane.
6. The screw precession mechanism of claim 4, wherein: the power element (26) is a motor, a worm wheel is arranged on the screw rod rotating seat (23), and an output shaft of the motor is in transmission connection with the worm wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120518124.4U CN214341241U (en) | 2021-03-11 | 2021-03-11 | Screw rod precession mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120518124.4U CN214341241U (en) | 2021-03-11 | 2021-03-11 | Screw rod precession mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN214341241U true CN214341241U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120518124.4U Active CN214341241U (en) | 2021-03-11 | 2021-03-11 | Screw rod precession mechanism |
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| CN (1) | CN214341241U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112806761A (en) * | 2021-03-11 | 2021-05-18 | 博格睿(重庆)科技有限公司 | Screw rod precession mechanism |
-
2021
- 2021-03-11 CN CN202120518124.4U patent/CN214341241U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112806761A (en) * | 2021-03-11 | 2021-05-18 | 博格睿(重庆)科技有限公司 | Screw rod precession mechanism |
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