CN216666388U - Multi-section lead screw synchronous driving lifting device - Google Patents
Multi-section lead screw synchronous driving lifting device Download PDFInfo
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- CN216666388U CN216666388U CN202220310652.5U CN202220310652U CN216666388U CN 216666388 U CN216666388 U CN 216666388U CN 202220310652 U CN202220310652 U CN 202220310652U CN 216666388 U CN216666388 U CN 216666388U
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- lead screw
- spline
- outer tube
- internal thread
- rod
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Abstract
The utility model belongs to the technical field of lifting device application, and particularly relates to a multi-section screw rod synchronous driving lifting device. The lifting device comprises a screw rod assembly and an outer tube assembly sleeved outside the screw rod assembly, wherein the outer tube assembly comprises a first outer tube, a second outer tube and a third outer tube which are sequentially arranged from bottom to top, the bottom of the third outer tube is sleeved in the second outer tube, the second outer tube is sleeved in the first outer tube, the screw rod assembly comprises a first screw rod and a second screw rod, the bottom of the first screw rod is fixedly connected with the bottom of the first outer tube, the second screw rod is sleeved outside the first screw rod, a spline rod is arranged at the top of the second screw rod, and the spline rod is sleeved in the second screw rod in a telescopic manner through a spline component.
Description
Technical Field
The utility model belongs to the technical field of lifting device application, and particularly relates to a multi-section screw rod synchronous driving lifting device.
Background
The existing lifting learning table is basically composed of a section of spiral screw rod and two sections of foot tubes, the height of a table frame is lifted by rotating the screw rod through a manual gear box, the structure is simple and reliable, but the lifting speed is low, labor is wasted during manual rotation, the table cannot be lifted to a higher level when the table is used for standing in the young, and particularly when the rotary screw rod is almost completely lifted, the two sections of foot tubes have unstable potential safety hazards of the table; meanwhile, the length of the screw rod is increased along with the increase of the lifting height, the height stroke is limited, the use of children in low age cannot be met, and a great deal of inconvenience is caused in daily application.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems of the lifting device used for lifting the learning table, the utility model provides the multi-section screw rod synchronous driving lifting device which is reasonable in design, simple in structure, convenient to process, capable of effectively improving the lifting efficiency, safe and stable.
In order to achieve the above object, the present invention adopts a technical solution that the present invention provides a multi-section screw rod synchronous driving lifting device, which comprises a screw rod assembly and an outer tube assembly sleeved outside the screw rod assembly, wherein the outer tube assembly comprises a first outer tube, a second outer tube and a third outer tube which are sequentially arranged from bottom to top, the bottom of the third outer tube is sleeved in the second outer tube, the second outer tube is sleeved in the first outer tube, the screw rod assembly comprises a first screw rod and a second screw rod, the bottom of the first screw rod is fixedly connected with the bottom of the first outer tube, the second screw rod is sleeved outside the first screw rod, a spline rod is arranged at the top of the second screw rod, the spline rod is telescopically sleeved in the second screw rod through a spline component, the second screw rod is rotatably sleeved outside the first screw rod, a driving mechanism for driving the spline rod to rotate is arranged at the top of the spline rod, the second screw rod is driven by the spline component to rotate, the first screw rod is sleeved with a first internal thread seat and a second internal thread seat which are arranged up and down, wherein the first internal thread seat is connected with a second outer pipe, the second internal thread seat is connected with a third outer pipe, and the second internal thread seat is fixed at the bottom of the second screw rod.
Preferably, the spline assembly comprises a spline seat fixed at the top of the second lead screw and a spline core sleeved inside the spline seat, the spline core is in a tubular shape, the spline core is fixedly connected with the spline seat, a longitudinal convex column is arranged on the inner wall of the spline core, and a longitudinal groove matched with the longitudinal convex column is formed in the spline rod.
Preferably, actuating mechanism is including being the gear housing and the control tube of horizontal installation in the gear housing that box-like setting, the control tube rotates and sets up in the gear housing, the cover is equipped with initiative bevel gear on the control tube, be provided with the transmission bevel gear with initiative bevel gear meshing in the gear housing, the top of spline pole is provided with the connecting rod, the connecting rod stretches into in the gear housing, transmission bevel gear suit is on the connecting rod, be provided with on the gear housing and be used for exposing the orificial through-hole of control tube.
Preferably, the tube hole of the control tube is formed in a polygonal shape.
As preferred, be provided with the second internal thread piece in the second internal thread seat, the second internal thread piece is held and is stretched into the tubulose end in the second lead screw including the step that sets up in the second internal thread seat, the one end that the step end was kept away from to the tubulose end is opening setting and its both sides and is provided with the barb, be provided with the recess with barb matched with in the second lead screw, be provided with the internal screw thread with first lead screw matched with in the second internal thread piece, the second internal thread piece rotates and sets up in the second internal nut seat.
Compared with the prior art, the utility model has the advantages and positive effects that,
the lifting device has the advantages of novel structure, convenience in use, small volume, light self weight and large bearing capacity, adopts a 3-section structure, has high lifting speed of the upper section and the lower section in equidistant synchronous lifting, saves waiting time, has higher stable safety performance and good benefit because the upper section and the lower section are overlapped in an equidistant way during lifting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a schematic structural diagram of a multi-section lead screw synchronous driving lifting device provided in embodiment 1;
FIG. 2 is a schematic structural diagram of the lifting device with a plurality of sections synchronously driven by the lead screws and with a part of the outer tube assembly removed in embodiment 1;
FIG. 3 is a front view of embodiment 1, with a part of an outer tube assembly removed, of a multi-section screw rod synchronous driving lifting device;
fig. 4 is a schematic structural diagram of a screw assembly provided in embodiment 1;
FIG. 5 is an exploded view between the first lead screw and the second lead screw provided in example 1;
FIG. 6 is an exploded view between a second lead screw and a spline shaft provided in example 1;
FIG. 7 is an exploded view between the spline shaft and the driving mechanism provided in example 1;
in the above figures, 1, an outer tube assembly; 11. a first outer tube; 12. a second outer tube; 13. a third outer tube; 14. a first pipe sleeve; 15. a second pipe sleeve; 2. a screw rod assembly; 21. a first lead screw; 22. a second lead screw; 23. a spline bar; 231. a longitudinal slot; 3. a spline assembly; 31. a spline seat; 32. a spline core; 321. a longitudinal convex column; 4. a first female screw seat; 5. a second female screw seat; 51. a second internal thread block; 511. a step end; 512. a tubular end; 513. a barb; 52. a bearing; 6. a drive mechanism; 61. a gear housing; 62. a control tube; 63. a driving bevel gear; 64. a transmission bevel gear; 65. a connecting rod.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the present invention is not limited to the specific embodiments disclosed in the following description.
In order to realize rapid expansion and contraction, in the present embodiment, a synchronous expansion and contraction manner is adopted to realize rapid expansion and contraction, for this reason, the screw rod assembly 2 provided in the present embodiment includes a first screw rod 21 whose bottom is fixedly connected with the bottom of the first outer tube 11, and a second screw rod 22 sleeved outside the first screw rod 21, in the present embodiment, a connecting plate is disposed at the bottom of the first outer tube 11, the first screw rod 21 is fixed on the connecting plate, and is kept stationary, and the second screw rod 22 is disposed in a tubular shape, so that when the second screw rod 22 rotates, the up-and-down movement of the second screw rod 22 on the first screw rod 21 is realized.
The spline rod 23 is arranged at the top of the second lead screw 22, and is also the third rod of the lead screw assembly 2, the spline rod 23 is telescopically sleeved in the second lead screw 22 through the spline component 3, the spline component 3 achieves the purpose of utilizing the rotation of the spline rod 23 to achieve the rotation of the second lead screw 22, the top of the spline rod 23 is provided with a driving mechanism 6 for driving the spline rod 23 to rotate, therefore, the spline component 3 provided by the embodiment is fixed on the spline seat 31 at the top of the second lead screw 22 and the spline core 32 sleeved in the spline seat 31, in the embodiment, the spline seat 31 is also in a tubular shape, the bottom of the spline seat is fixedly connected with the second lead screw 22, the upper part of the spline seat is sleeved with the spline core 32, the spline core 32 is also in a tubular shape, the spline core 32 is fixedly connected with the spline seat 31, in the embodiment, holes are arranged on the spline core 32 and the spline seat 31, and the fixation of the spline core and the spline seat is achieved through a cylinder inserted into the hole, in consideration of the synchronous movement, in the present embodiment, a longitudinal boss 321 is provided on the inner wall of the spline core 32, and a longitudinal groove 231 matched with the longitudinal boss 321 is provided on the spline rod 23. In this way, the spline rod 23 can be surely slid and extended in the second lead screw 22, and the second lead screw 22 can be rotated when the spline rod 23 is rotated.
In order to realize the sliding of the spline rod 23, the connection between the screw rod assembly 2 and the outer tube assembly 1 needs to be realized, in this embodiment, a first internal thread seat 4 and a second internal thread seat 5 which are arranged up and down are sleeved on the second screw rod 22, wherein the first internal thread seat 4 is connected with the second outer tube 12, the second internal thread seat 5 is connected with the third outer tube 13, and the second internal thread seat 5 is fixed at the bottom of the second screw rod 22. In this embodiment, the first internal thread seat 4 and the second internal thread seat 5 are respectively provided with a first internal thread block and a second internal thread block 51, which are rotatably disposed on the first internal thread seat 4 and the second internal thread seat 5, such that, under the rotation of the second lead screw 22, due to the fixed position between the top of the spline rod 23 and the top of the third external tube 13 (the third external tube 13 is fixed on the table frame, and the spline rod 23 is also fixed on the table frame through the driving mechanism 6), since the bottom of the first lead screw 21 is fixed and the top of the spline rod 23 is fixed, under the rotation of the spline rod 23, the second lead screw 22 is influenced by the rotation of the spline rod 23, the second internal thread seat 5 is rotated to drive the third external tube 13 to lift relative to the second external tube 12, thereby realizing the telescopic sliding of the spline rod 23, and the rotation of the second lead screw 22 realizes the lifting relative to the first lead screw 21, thereby drive second outer tube 12 go up and down on first outer tube 11, like this, just realized the synchronous flexible of second outer tube 12 and third outer tube 13, improved flexible effect, simultaneously, also reduced the length of silk pole, ensured stability.
In order to facilitate the driving of the spline shaft 23, in the present embodiment, the driving mechanism 6 includes a gear housing 61 disposed in a box shape and a control pipe 62 horizontally disposed in the gear housing 61, through holes are disposed at front and rear ends of the gear housing 61, bearings 52 of the control pipe 62 are disposed in the through holes, so as to realize the rotation of the control pipe 62 in the gear housing 61, a driving bevel gear 63 is sleeved on the control pipe 62, so that the driving bevel gear 63 is in a vertical state, a transmission bevel gear 64 engaged with the driving bevel gear 63 is disposed in the gear housing 61, the transmission bevel gear 64 is in a horizontal state, a connecting rod 65 is disposed on the top of the spline shaft 23, in the present embodiment, in order to facilitate the installation of the connecting rod 65 and the spline shaft 23, the connecting rod 65 extends into the gear housing 61, and the transmission bevel gear 64 is sleeved on the connecting rod 65, thus, when the control tube 62 rotates, the spline rod 23 is rotated.
In order to facilitate the rotation of the control tube 62, a through hole for exposing the orifice of the control tube 62 is provided in the gear housing 61, and the orifice of the control tube 62 is disposed in a polygonal shape. In this embodiment, the hexagonal prism is mainly used to facilitate the insertion of the hexagonal prism and control the rotation. Of course, other configurations are possible, as long as the control tube 62 is controlled to rotate.
In the present embodiment, considering that the second female screw holder 5 is fixed to the bottom of the second lead screw 22, for this purpose, it cannot be as simple as a mounting plus a nut-like structure, for which, in this embodiment, a second female screw block 51 is provided in the second female screw holder 5, the second female screw block 51 includes a stepped end 511 provided in the second female screw holder 5 and a tubular end 512 extending into the second lead screw 22, the end of the tubular end 512 far away from the step end 511 is open and has barbs 513 on both sides, a groove matching with the barbs 513 is arranged in the second lead screw 22 to ensure the fixation between the second internal thread block 51 and the second lead screw 22, an internal thread is provided in the second internal thread block 51, which cooperates with the first threaded spindle 21, in such a way that a rotation of the second threaded spindle 22 relative to the first threaded spindle 21 is ensured, while the second internal thread block 51 is rotatably arranged in the second internal nut seat. Specifically, a bearing 52 is sleeved outside the second internal thread block 51, so that the second screw rod 22 can be ensured to rotate, and the second external tube 12 only goes up and down.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (5)
1. A multi-section lead screw synchronous driving lifting device comprises a lead screw assembly and an outer tube assembly sleeved outside the lead screw assembly, wherein the outer tube assembly comprises a first outer tube, a second outer tube and a third outer tube which are sequentially arranged from bottom to top, the bottom of the third outer tube is sleeved in the second outer tube, the second outer tube is sleeved in the first outer tube, the multi-section lead screw synchronous driving lifting device is characterized in that the lead screw assembly comprises a first lead screw fixedly connected with the bottom of the first outer tube and a second lead screw sleeved outside the first lead screw, a spline rod is arranged at the top of the second lead screw, the spline rod is sleeved in the second lead screw through a spline component in a telescopic manner, the second lead screw is rotatably sleeved outside the first lead screw, a driving mechanism for driving the spline rod to rotate is arranged at the top of the spline rod, the second lead screw is driven by the spline component to rotate, the first screw rod is sleeved with a first internal thread seat and a second internal thread seat, the first internal thread seat and the second internal thread seat are vertically arranged, the first internal thread seat is connected with a second outer pipe, the second internal thread seat is connected with a third outer pipe, and the second internal thread seat is fixed at the bottom of the second screw rod.
2. The multi-section lead screw synchronous driving lifting device as claimed in claim 1, wherein the spline assembly comprises a spline seat fixed at the top of the second lead screw and a spline core sleeved inside the spline seat, the spline core is arranged in a tubular shape, the spline core is fixedly connected with the spline seat, a longitudinal convex column is arranged on the inner wall of the spline core, and a longitudinal groove matched with the longitudinal convex column is arranged on the spline rod.
3. The multi-section lead screw synchronous driving lifting device as claimed in claim 1 or 2, wherein the driving mechanism comprises a gear housing and a control tube, the gear housing is arranged in a box shape, the control tube is horizontally arranged in the gear housing, the control tube is rotatably arranged in the gear housing, a driving bevel gear is sleeved on the control tube, a transmission bevel gear meshed with the driving bevel gear is arranged in the gear housing, a connecting rod is arranged at the top of the spline rod and extends into the gear housing, the transmission bevel gear is sleeved on the connecting rod, and a through hole for exposing the orifice of the control tube is formed in the gear housing.
4. The multi-section screw rod synchronous driving lifting device as claimed in claim 3, wherein the pipe hole of the control pipe is polygonal.
5. The multi-section lead screw synchronous driving lifting device as claimed in claim 3, wherein a second internal thread block is arranged in the second internal thread seat, the second internal thread block comprises a step end arranged in the second internal thread seat and a tubular end extending into the second lead screw, one end of the tubular end far away from the step end is open and has barbs arranged on both sides, a groove matched with the barbs is arranged in the second lead screw, an internal thread matched with the first lead screw is arranged in the second internal thread block, and the second internal thread block is rotatably arranged in the second internal nut seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220310652.5U CN216666388U (en) | 2022-02-16 | 2022-02-16 | Multi-section lead screw synchronous driving lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220310652.5U CN216666388U (en) | 2022-02-16 | 2022-02-16 | Multi-section lead screw synchronous driving lifting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216666388U true CN216666388U (en) | 2022-06-03 |
Family
ID=81764719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220310652.5U Active CN216666388U (en) | 2022-02-16 | 2022-02-16 | Multi-section lead screw synchronous driving lifting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216666388U (en) |
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2022
- 2022-02-16 CN CN202220310652.5U patent/CN216666388U/en active Active
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