CN212928686U - Lifting column transmission system assembly - Google Patents
Lifting column transmission system assembly Download PDFInfo
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- CN212928686U CN212928686U CN202020357308.2U CN202020357308U CN212928686U CN 212928686 U CN212928686 U CN 212928686U CN 202020357308 U CN202020357308 U CN 202020357308U CN 212928686 U CN212928686 U CN 212928686U
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- screw rod
- hollow screw
- sleeve
- fixedly connected
- system assembly
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Abstract
The utility model discloses a lift post transmission system assembly. The system assembly is provided with a telescopic sleeve, a lifting column transmission assembly is arranged in the telescopic sleeve, the lifting column transmission assembly comprises a transmission shaft, a first hollow screw rod, a second hollow screw rod and a guide pipe which are sequentially sleeved from inside to outside, the top end of the second hollow screw rod is fixedly provided with a first hollow screw rod nut, the top end of the guide pipe is fixedly provided with a second hollow screw rod nut, the first hollow screw rod nut is sleeved outside the first hollow screw rod in a threaded manner, and the second hollow screw rod nut is sleeved outside the second hollow screw rod in a threaded manner; the transmission shaft and the second hollow screw rod synchronously rotate through the synchronous rotating device. The utility model has compact structure, reduces the use of bearings, and realizes smaller installation height and larger stroke capacity; the whole structure can realize two-stage spiral transmission only by fastening two ends, and the two sections and the three sections of electric lifting upright columns use the same lifting column transmission assembly; the whole structure is small at the top and big at the bottom, and the structural stability is enhanced.
Description
Technical Field
The utility model belongs to the technical field of the transmission technique and specifically relates to a lift post transmission system assembly.
Background
The electric lifting column is widely applied to the fields of home furnishing, medical treatment and the like, and a pipe body of the existing electric lifting column generally comprises an inner pipe, a middle pipe, an outer pipe and a bottom shell which are sequentially sleeved from inside to outside, a driving device arranged in the bottom shell and a transmission assembly matched with the driving device. In order to optimize the appearance and improve the integral rigidity of the upright post, a bottom shell is eliminated in the market, and a driving device is arranged in an inner pipe or an outer pipe to form a built-in electric lifting upright post. Because of the requirement of the shortest length and the requirement of the elongation of the upright column, the traditional built-in lifting upright column structure has the contradiction between the lowest installation height and the larger stroke, namely, the low installation height cannot be suitable for the larger stroke. In addition, the traditional built-in lifting upright post structure also causes that two sections and three sections of electric lifting upright posts need to use different transmission structures, the same transmission structure cannot be used, and the universality is poor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the lifting column transmission system assembly is provided, which not only can solve the contradiction between the lowest installation height and the stroke of the built-in lifting column, but also can ensure that two sections and three sections of electric lifting columns use the same transmission structure.
The utility model provides a technical scheme that its technical problem adopted is: a lifting column transmission system assembly is provided with a telescopic sleeve, a lifting column transmission assembly is arranged in the telescopic sleeve, the lifting column transmission assembly comprises a transmission shaft, a first hollow screw rod, a second hollow screw rod and a guide pipe which are sequentially sleeved from inside to outside, the top end of the second hollow screw rod is fixedly provided with a first hollow screw rod nut, the top end of the guide pipe is fixedly provided with a second hollow screw rod nut, and a first bearing is arranged between the transmission shaft and the first hollow screw rod; the first hollow screw rod and the nut are sleeved outside the first hollow screw rod in a threaded manner, and the second hollow screw rod and the nut are sleeved outside the second hollow screw rod in a threaded manner; the transmission shaft and the second hollow screw rod synchronously rotate through the synchronous rotating device.
Furthermore, the transmission shaft, the first hollow screw rod, the second hollow screw rod and the guide pipe are coaxially arranged, so that the transmission efficiency is improved, and the transmission loss is reduced.
Furthermore, the guide pipe is sleeved with a round pipe, and the top of the round pipe is connected with the top of the second hollow screw rod through a second bearing.
Furthermore, the synchronous rotating device comprises a connecting part positioned on the inner wall of the second hollow screw rod, a pin hole is formed in the center of the connecting part, a connecting pin protruding outwards is arranged at the bottom end of the transmission shaft, the pin hole and the connecting pin are installed in a matched mode, and the transmission shaft and the second hollow screw rod are enabled to rotate synchronously after the connecting pin is inserted into the pin hole. The pin hole is a non-cylindrical hole.
Furthermore, a first buffer block is installed on the outer wall of the first hollow screw rod and located above the first hollow screw rod nut, a second buffer block is installed on the outer wall of the second hollow screw rod and located above the second hollow screw rod nut.
Furthermore, the telescopic sleeve is a two-section sleeve and is provided with an upper sleeve and a lower sleeve, the top end of the first hollow screw rod is fixedly provided with an end part, the top end of the upper sleeve is fixedly connected with the top end of the end part through a connecting piece, the bottom end of the guide pipe is fixedly connected with a fixed seat, and the bottom end of the lower sleeve is fixedly connected with the fixed seat through a connecting piece; the upper sleeve is sleeved outside the lower sleeve, or the lower sleeve is sleeved outside the upper sleeve.
Furthermore, the telescopic sleeve is a three-section sleeve and is provided with an upper sleeve, a middle sleeve and a lower sleeve, the top end of the first hollow screw rod is fixedly provided with an end part, the top of the upper sleeve is fixedly connected with the top of the end part through a connecting piece, the bottom end of the guide pipe is fixedly connected with a fixed seat, the bottom of the lower sleeve is fixedly connected with the fixed seat through a connecting piece, and the top of the middle sleeve is connected with the top of the second hollow screw rod through a third bearing; the upper casing, the middle casing and the lower casing are sequentially sleeved, and the lower casing is a basic inner pipe.
Furthermore, the telescopic sleeve is a three-section sleeve and is provided with an upper sleeve, a middle sleeve and a lower sleeve, the top end of the first hollow screw rod is fixedly provided with an end part, the top of the upper sleeve is fixedly connected with the top of the end part through a connecting piece, the bottom of the middle sleeve is fixedly connected with the bottom of the circular tube through a connecting piece, the bottom of the guide tube is fixedly connected with a fixed seat, and the bottom of the lower sleeve is fixedly connected with the fixed seat through a connecting piece; the upper sleeve, the middle sleeve and the lower sleeve are sequentially sleeved, and the upper sleeve is a basic inner pipe.
The utility model has the advantages that: the utility model discloses simple structure has following advantage:
(1) compared with the traditional lifting upright post transmission structure, the utility model reduces the use of bearings, has compact structure and realizes smaller installation height and larger stroke capacity;
(2) the lifting column transmission system assembly can realize lifting of the first hollow screw rod and the second hollow screw rod only by fastening two ends, and two sections and three sections of electric lifting stand columns can use the same lifting column transmission assembly, so that the general performance of the lifting column transmission assembly is improved;
(3) the whole structure is compact, and the use of the bearing and the bearing seat is reduced, so that the production cost is reduced;
(4) the utility model has a small upper part and a big lower part of the whole structure, thereby enhancing the structural stability;
(5) the axial stress of the transmission shaft is not influenced by the lifting load, and the integral bearing capacity is increased.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic structural view of a lift column transmission assembly;
FIG. 2 is a schematic structural view of embodiment 1;
FIG. 3 is a schematic structural view of example 2;
FIG. 4 is a schematic structural view of embodiment 3;
FIG. 5 is a schematic structural view of example 4.
In the figure: 1. the novel screw rod assembly comprises a transmission shaft, 2, a first hollow screw rod, 3, a second hollow screw rod, 4, a guide pipe, 5, a first hollow screw rod nut, 6, a second hollow screw rod nut, 7, an end portion, 8, a first buffer block, 9, a second buffer block, 10, a connecting portion, 11, a connecting pin, 12, a first bearing, 13, a fixed seat, 14, an upper sleeve, 15, a middle sleeve, 16, a lower sleeve, 17, a circular pipe, 18, a threaded fastening sleeve, 19, a fastening screw, 20, a second bearing and 21, a third bearing.
Detailed Description
The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Example 1
As shown in fig. 1-2, the positive two-section lifting column transmission system assembly comprises a telescopic tube, a lifting column transmission assembly is arranged in the telescopic tube, the lifting column transmission assembly comprises a transmission shaft 1, a first hollow screw rod 2, a second hollow screw rod 3 and a guide tube 4 which are sequentially sleeved from inside to outside, a thread fastening sleeve 18 is sleeved on the top of the second hollow screw rod 3, the first hollow screw rod nut 5 is fixed at the top end of the second hollow screw rod 3 by the thread fastening sleeve 18, and the axial movement of the first hollow screw rod nut 5 is limited by the thread fastening sleeve 18; a second hollow screw nut 6 is fixedly arranged at the top end of the guide tube 4, and a first bearing 12 is arranged between the transmission shaft 1 and the first hollow screw 2; the first hollow screw rod nut 5 is sleeved outside the first hollow screw rod 2 in a threaded manner, and the second hollow screw rod nut 6 is sleeved outside the second hollow screw rod 3 in a threaded manner; the transmission shaft 1 and the second hollow screw rod 3 synchronously rotate through a synchronous rotating device; the top end of the first hollow screw rod 2 is fixedly provided with an end part 7. The end part 7 is provided with a motor for driving the transmission shaft 1 to rotate, the output end of the motor is connected with a reduction gearbox, and the output end of the reduction gearbox is connected with the transmission shaft 1 through a coupler.
The transmission shaft 1, the first hollow screw rod 2, the second hollow screw rod 3 and the guide pipe 4 are coaxially arranged; the synchronous rotating device comprises a connecting part 10 positioned on the inner wall of the second hollow screw rod 3, a pin hole is formed in the center of the connecting part 10, a connecting pin 11 protruding outwards is arranged at the bottom end of the transmission shaft 1, and the connecting pin 11 is fixedly connected with the connecting part 10 in a riveting mode after being inserted into the pin hole, so that the transmission shaft 1 and the second hollow screw rod 3 rotate synchronously. The connecting pin 11 is matched and connected with the pin hole, and the pin hole is a non-cylindrical hole.
A fastening screw 19 is installed at the top end of the transmission shaft 1, the fastening screw 19 is fixedly connected with the coupler, the shoulder of the transmission shaft 1 is limited by the first bearing 12, and the transmission shaft 1 and the first hollow screw rod 2 are limited axially under the combined action of the fastening screw 19 and the shoulder of the transmission shaft 1.
A round pipe 17 is sleeved outside the guide pipe 4, the top of the round pipe 17 is connected with a threaded fastening sleeve 18 through a second bearing 20, the length of the round pipe 17 is consistent with that of the second hollow screw rod 3, and the round pipe 17 cannot be driven to rotate by the rotation of the second hollow screw rod 3.
A first buffer block 8 is installed on the outer wall of the first hollow screw rod 2, the first buffer block 8 is located above the first hollow screw rod nut 5, a second buffer block 9 is installed on the outer wall of the second hollow screw rod 3, and the second buffer block 9 is located above the second hollow screw rod nut 6. The first buffer block 8 and the second buffer block 9 have the following functions: when the lifting column transmission system assembly reaches the minimum height, the first buffer block 8 and the second buffer block 9 can buffer the impact force when the parts are contacted, and the vibration and the noise can be reduced.
The telescopic sleeve is a two-section sleeve and is provided with an upper sleeve 14 and a lower sleeve 16, the top of the upper sleeve 16 is fixedly connected with the top of the end part 7 through a connecting piece, the bottom end of the guide pipe 4 is fixedly connected with a fixed seat 13, and the bottom of the lower sleeve 16 is fixedly connected with the fixed seat 13 through a connecting piece; the upper sleeve 14 is sleeved outside the lower sleeve 16.
The first bearing 12 and the second bearing 20 both employ sliding bearings.
According to the lifting column transmission system assembly, the end part 7 is fixed on a fixed lifting part, the fixed seat 13 is fixed on a bottom plate or a fixed external part, the first hollow screw rod 2 is fixedly connected with the end part 7, and the guide pipe 4 is fixedly connected with the fixed seat 13, so that the rotation of the first hollow screw rod 2 and the guide pipe 4 is limited, and the working process of the lifting column transmission system assembly is as follows:
in the ascending process, the motor drives the transmission shaft 1 to rotate, the transmission shaft 1 drives the second hollow screw rod 3 to synchronously rotate under the transmission of the synchronous rotating device, and the second hollow screw rod 3 rotates due to the threaded connection of the second hollow screw rod 3 and the second hollow screw rod nut 6, so that the second hollow screw rod 3 ascends relative to the guide pipe 4; because the first bearing 12 is arranged between the transmission shaft 1 and the first hollow screw rod 2, the transmission shaft 1 can not drive the first hollow screw rod 2 to rotate when rotating, the first hollow screw rod 2 is fixedly connected with the end part 7, and the transmission shaft 1 is rotatably connected with the end part 7, therefore, the transmission shaft 1 and the first hollow screw rod 2 are relatively static in the axial direction and can rotate relatively in the circumferential direction; the second hollow screw rod 3 rotates, the first hollow screw rod nut 5 fixed at the top end of the second hollow screw rod 3 also synchronously rotates, the first hollow screw rod nut 5 moves downwards relative to the first hollow screw rod 2, the first hollow screw rod 2 is lifted relatively, two-stage screw transmission of the first hollow screw rod nut 5 and the second hollow screw rod nut 6 realizes two-stage rising of the first hollow screw rod 2 and the second hollow screw rod 3, the upper sleeve 14 and the lower sleeve 16 are stretched, the rising part makes rising action, and meanwhile, the transmission structure of the lifting column transmission system assembly plays a role in converting input torque into output stroke;
in the descending process, the motor drives the transmission shaft 1 to rotate reversely, and the upper sleeve 14 and the lower sleeve 16 contract, so that the descending process of the lifting column transmission system assembly can be realized.
Example 2
The difference between the inverted two-section lifting column transmission system assembly shown in fig. 3 and the embodiment 1 is that: the upper sleeve 14 is sleeved outside the lower sleeve 16.
Example 3
As shown in fig. 4, the difference between the inverted three-section lifting column transmission system assembly and the embodiment 1 is that: the inverted three-section lifting column transmission system assembly is not provided with the circular tube 17 and the second bearing 20, so that the structure of the transmission system assembly is simplified.
In addition, the telescopic sleeve is a three-section sleeve and is provided with an upper sleeve 14, a middle sleeve 15 and a lower sleeve 16, the top of the upper sleeve 16 is fixedly connected with the top of the end part 7 through a connecting piece, the bottom end of the guide pipe 4 is fixedly connected with a fixed seat 13, the bottom of the lower sleeve 16 is fixedly connected with the fixed seat 13 through a connecting piece, and the top of the middle sleeve 15 is connected with the outer wall of a thread fastening sleeve 18 through a third bearing 21; the upper casing 14, the middle casing 15 and the lower casing 16 are sequentially sleeved, and the lower casing 16 is the innermost casing. The third bearing 21 is a sliding bearing.
The ascending process of the inverted three-section lifting column transmission system assembly is as follows: the two-stage screw transmission of the first hollow screw rod nut 5 and the second hollow screw rod nut 6 realizes the two-stage ascending of the first hollow screw rod 2 and the second hollow screw rod 3, drives the upper sleeve 14 and the middle sleeve 15 to ascend, so that the upper sleeve 14, the middle sleeve 15 and the lower sleeve 16 are stretched, the ascending part makes ascending action, and meanwhile, the transmission structure of the lifting column transmission system assembly plays a role in converting input torque into output stroke.
Example 4
Fig. 5 shows a positive three-section lifting column transmission system assembly, which is different from embodiment 1 in that: the telescopic tube is a three-section tube and is provided with an upper tube 14, a middle tube 15 and a lower tube 16, the top of the upper tube 16 is fixedly connected with the top of the end part 7 through a connecting piece, the bottom end of the guide tube 4 is fixedly connected with a fixed seat 13, and the bottom of the lower tube 16 is fixedly connected with the fixed seat 13 through a connecting piece; a round pipe 17 is sleeved outside the guide pipe 4, the top of the round pipe 17 is fixedly connected with the top of the thread fastening sleeve 18, and the length of the round pipe 17 is consistent with that of the second hollow screw rod 3; the bottom of the middle sleeve 15 is fixedly connected with the bottom of the circular tube 17 through a connecting piece; the upper casing 14, the middle casing 15 and the lower casing 16 are successively nested and the upper casing 14 is the innermost casing.
The ascending process of the positive three-section lifting column transmission system assembly is as follows: the two-stage screw transmission of the first hollow screw rod nut 5 and the second hollow screw rod nut 6 realizes the two-stage ascending of the first hollow screw rod 2 and the second hollow screw rod 3, drives the upper sleeve 14 and the middle sleeve 15 to ascend, so that the upper sleeve 14, the middle sleeve 15 and the lower sleeve 16 are stretched, the ascending part makes ascending action, and meanwhile, the transmission structure of the lifting column transmission system assembly plays a role in converting input torque into output stroke.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (8)
1. A lifting column drive system assembly, characterized by: the lifting column transmission assembly is arranged in the telescopic sleeve and comprises a transmission shaft (1), a first hollow screw rod (2), a second hollow screw rod (3) and a guide pipe (4) which are sequentially sleeved from inside to outside, a first hollow screw rod nut (5) is fixedly arranged at the top end of the second hollow screw rod (3), a second hollow screw rod nut (6) is fixedly arranged at the top end of the guide pipe (4), and a first bearing (12) is arranged between the transmission shaft (1) and the first hollow screw rod (2); the first hollow screw rod nut (5) is sleeved outside the first hollow screw rod (2) in a threaded manner, and the second hollow screw rod nut (6) is sleeved outside the second hollow screw rod (3) in a threaded manner; the transmission shaft (1) and the second hollow screw rod (3) synchronously rotate through a synchronous rotating device.
2. The lift column drive system assembly of claim 1, wherein: the transmission shaft (1), the first hollow screw rod (2), the second hollow screw rod (3) and the guide pipe (4) are coaxially arranged.
3. The lift column drive system assembly of claim 1, wherein: the guide tube (4) is sleeved with a round tube (17), and the top of the round tube (17) is connected with the top of the second hollow screw rod (3) through a second bearing (20).
4. The lift column drive system assembly of claim 1, wherein: the synchronous rotating device comprises a connecting part (10) located on the inner wall of the second hollow screw rod (3), a pin hole is formed in the center of the connecting part (10), an outwards-protruding connecting pin (11) is arranged at the bottom end of the transmission shaft (1), the pin hole is installed in a matched mode with the connecting pin (11), and the connecting pin (11) is inserted into the pin hole to enable the transmission shaft (1) and the second hollow screw rod (3) to rotate synchronously.
5. The lift column drive system assembly of claim 1, wherein: first buffer block (8) are installed to first hollow lead screw (2) outer wall, and first buffer block (8) are located first hollow screw-nut (5) top, and second buffer block (9) are installed to second hollow lead screw (3) outer wall, and second buffer block (9) are located second hollow screw-nut (6) top.
6. The lift column drive system assembly of claim 3, wherein: the telescopic sleeve is a two-section sleeve and is provided with an upper sleeve (14) and a lower sleeve (16), the top end of the first hollow screw rod (2) is fixedly provided with an end part (7), the top of the upper sleeve (14) is fixedly connected with the top of the end part (7) through a connecting piece, the bottom end of the guide pipe (4) is fixedly connected with a fixed seat (13), and the bottom of the lower sleeve (16) is fixedly connected with the fixed seat (13) through a connecting piece; the upper sleeve (14) is sleeved outside the lower sleeve (16), or the lower sleeve (16) is sleeved outside the upper sleeve (14).
7. The lift column drive system assembly of claim 1, wherein: the telescopic sleeve is a three-section sleeve and is provided with an upper sleeve (14), a middle sleeve (15) and a lower sleeve (16), the top end of the first hollow screw rod (2) is fixedly provided with an end part (7), the top of the upper sleeve (14) is fixedly connected with the top of the end part (7) through a connecting piece, the bottom end of the guide pipe (4) is fixedly connected with a fixed seat (13), the bottom of the lower sleeve (16) is fixedly connected with the fixed seat (13) through a connecting piece, and the top of the middle sleeve (15) is connected with the top of the second hollow screw rod (3) through a third bearing (21); the upper casing (14), the middle casing (15) and the lower casing (16) are sequentially sleeved, and the lower casing (16) is a basic inner pipe.
8. The lift column drive system assembly of claim 3, wherein: the telescopic sleeve is a three-section sleeve and is provided with an upper sleeve (14), a middle sleeve (15) and a lower sleeve (16), the top end of the first hollow screw rod (2) is fixedly provided with an end part (7), the top of the upper sleeve (14) is fixedly connected with the top of the end part (7) through a connecting piece, the bottom of the middle sleeve (15) is fixedly connected with the bottom of the circular tube (17) through a connecting piece, the bottom of the guide tube (4) is fixedly connected with a fixed seat (13), and the bottom of the lower sleeve (16) is fixedly connected with the fixed seat (13) through a connecting piece; the upper sleeve (14), the middle sleeve (15) and the lower sleeve (16) are sequentially sleeved, and the upper sleeve (14) is a basic inner pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357308.2U CN212928686U (en) | 2020-03-19 | 2020-03-19 | Lifting column transmission system assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357308.2U CN212928686U (en) | 2020-03-19 | 2020-03-19 | Lifting column transmission system assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212928686U true CN212928686U (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020357308.2U Active CN212928686U (en) | 2020-03-19 | 2020-03-19 | Lifting column transmission system assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212928686U (en) |
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2020
- 2020-03-19 CN CN202020357308.2U patent/CN212928686U/en active Active
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