CN211998611U - Lifting mechanism - Google Patents
Lifting mechanism Download PDFInfo
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- CN211998611U CN211998611U CN202020143186.7U CN202020143186U CN211998611U CN 211998611 U CN211998611 U CN 211998611U CN 202020143186 U CN202020143186 U CN 202020143186U CN 211998611 U CN211998611 U CN 211998611U
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- sleeve
- screw rod
- clamping structure
- meshing
- upper screw
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Abstract
A lift mechanism comprising: the device comprises a sleeve, an upper screw rod and a lower screw rod; the top end of the upper screw rod is provided with a driving mechanism for driving the upper screw rod to rotate; the sleeve is communicated up and down, and the bottom end of the upper screw rod extends into the sleeve from the top end of the sleeve and is in threaded connection with the upper port of the sleeve; the lower screw rod extends into the sleeve from the bottom end of the sleeve and is in threaded connection with the lower port of the sleeve; the lower screw rod is hollow, and the upper screw rod can extend into the lower screw rod; a first clamping structure is arranged in the sleeve close to the top; the bottom end of the upper screw rod is provided with a second clamping structure which can be matched with the first clamping structure; when the second clamping structure rises to the top of the sleeve along with the rotation of the upper screw rod, the second clamping structure is matched with the first clamping structure, and the sleeve rotates along with the upper screw rod; the sleeve pipe descends around the rotation of lower lead screw to when the top of lower lead screw and first joint structure butt, first joint structure and the separation of second joint structure, go up the rotatory decline of lead screw and continue to go deep into down in the lead screw. The lifting mechanism is simple in adjusting process, large in lifting amplitude and high in safety factor.
Description
Technical Field
The present disclosure relates generally to the field of lifting devices, and more particularly to a lifting mechanism.
Background
At present, the lifting mechanism is widely applied to various products, such as lifting desks and chairs, lifting equipment, lifting furniture and the like.
However, in the prior art, the lifting mechanism generally comprises two parts, namely an upper support provided with a positioning hole and a lower support provided with a fixing hole, and a single screw shaft and a fixing nut matched with the single screw shaft, so that the lifting amplitude is small; the connection mode is mostly that the bolt or the chute are installed and fixed, and the adjustment process is comparatively complicated.
Disclosure of Invention
In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a lifting mechanism with three-stage mechanical lifting, simple and convenient adjustment process, better safety performance and larger lifting amplitude.
In order to solve the above technical problem, a first aspect of the present application provides a lifting mechanism, including: the device comprises a sleeve, an upper screw rod and a lower screw rod; the top end of the upper screw rod is provided with a driving mechanism for driving the upper screw rod to rotate; the sleeve is vertically communicated, and the top end of the upper screw rod extends out of the top end of the sleeve and is in threaded connection with the upper port of the sleeve; the lower screw rod extends into the lower end of the sleeve and is in threaded connection with the lower port of the sleeve; the lower screw rod is hollow, and the upper screw rod can extend into the lower screw rod;
a first clamping structure is arranged in the sleeve close to the top; the bottom end of the upper screw rod is connected with a second clamping structure which can be matched with the first clamping structure;
when the second clamping structure rises to the first clamping structure along with the rotation of the upper screw rod, the second clamping structure is matched with the first clamping structure, so that the sleeve rotates along with the upper screw rod;
when the sleeve rotates around the lower screw rod and descends to the top of the lower screw rod and is abutted to the first clamping structure, the first clamping structure is separated from the second clamping structure, so that the upper screw rod rotates and descends to continue to penetrate into the lower screw rod.
According to the technical scheme provided by the embodiment of the application, the first clamping structure comprises: the meshing inner sleeve, the meshing outer sleeve, the return spring and the snap spring;
the meshing outer sleeve is fixed inside the sleeve; a clamp spring is arranged in the meshing outer sleeve and close to the bottom; the meshing inner sleeve is sleeved in the meshing outer sleeve; the meshing inner sleeve is provided with an upper structure and a lower structure, the upper part of the meshing inner sleeve is meshed with the meshing outer sleeve, and the lower part of the meshing inner sleeve can penetrate through the clamp spring so that the clamp spring is abutted against the upper part of the meshing inner sleeve;
the return spring is sleeved outside the upper screw rod and positioned between the meshing inner sleeve and the upper port of the sleeve, and the diameter of the return spring is larger than the outer diameter of the meshing inner sleeve;
the outer diameter of the lower screw rod is larger than the inner diameter of the lower part of the meshing inner sleeve, and the inner diameter of the lower screw rod is smaller than the outer diameter of the lower part of the meshing outer sleeve.
According to the technical scheme provided by the embodiment of the application, an upper screw sleeve is fixedly sleeved in the upper port of the sleeve, and the upper screw rod is in threaded connection with the upper screw sleeve.
According to the technical scheme provided by the embodiment of the application, a lower screw sleeve is fixedly sleeved in the lower port of the sleeve, and the lower screw rod is in threaded connection with the lower screw sleeve.
According to the technical scheme provided by the embodiment of the application, the driving mechanism is a crank or a stepping motor.
According to the technical scheme provided by the embodiment of the application, the lower end part of the lower screw rod is provided with the fixing support.
The application provides a lifting mechanism includes: the three-section lifting mechanism comprises a sleeve, an upper screw rod and a lower screw rod, wherein the upper screw rod is connected with the upper port of the sleeve through a thread, and the lower screw rod is connected with the lower port of the sleeve through a thread; a first clamping structure is arranged in the sleeve close to the top; the bottom end of the upper screw rod is provided with a second clamping structure which can be matched with the first clamping structure, so that the upper screw rod and the sleeve can be combined and separated, namely the upper screw rod can drive the sleeve to rotate together, the lower screw rod can extend into or out of the sleeve, and the upper screw rod can also rotate independently to extend into or out of the sleeve; the method specifically comprises the following steps:
in the ascending process, the upper screw rod is rotated to ascend around the sleeve in the lower screw rod in a rotating mode, and when the second clamping structure ascends to the first clamping structure along with the rotation of the upper screw rod, the second clamping structure is matched with the first clamping structure, so that the sleeve ascends along with the rotation of the upper screw rod around the lower screw rod;
in the descending process, when the sleeve pipe descends along with the rotation of the lower screw rod until the top end of the lower screw rod is abutted against the first clamping structure, the second clamping structure is separated from the first clamping structure, so that the upper screw rod descends in a rotating manner and continues to penetrate into the lower screw rod;
therefore, the adjustable height reaches the sum of the lengths of two sections of lifting mechanisms (an upper screw rod and a lower screw rod), the large-scale lifting space is realized, and the applicable range is wider; meanwhile, the lifting and descending of the whole lifting mechanism can be realized only by driving the upper screw rod to rotate, and the adjusting process is simple.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a perspective assembly view of a lift mechanism of the present application;
FIG. 2 is a schematic cross-sectional view of the inner and outer engaging sleeves of FIG. 1;
FIG. 3 is an enlarged view of a portion A of the structure shown in FIG. 1;
FIG. 4 is a partially enlarged view of the structure of part B shown in FIG. 1;
FIG. 5 is an enlarged view of a portion of the structure of section C of FIG. 1;
FIG. 6 is a front view of the lift mechanism of FIG. 1;
FIG. 7 is a cross-sectional structural schematic view of the lift mechanism of FIG. 1;
FIG. 8 is an enlarged partial view of the structure of portion D of FIG. 7;
reference numbers in the figures:
1. a drive mechanism; 2. feeding a screw rod; 3. threading a thread sleeve; 4. a return spring; 5. engaging the outer sleeve; 6. engaging the inner sleeve; 7. a second clamping structure; 8. a sleeve; 9. a wire sleeve is arranged; 10. a lower screw rod; 11. fixing a bracket; 12. a first clamping structure; 13. clamp spring
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Please refer to fig. 1 to 8, which are schematic diagrams of a lifting mechanism provided in this embodiment, wherein a sleeve 8, an upper screw rod 2 and a lower screw rod 10; the top end of the upper screw rod 2 is provided with a driving mechanism 1 for driving the upper screw rod to rotate; the sleeve 8 is communicated up and down, the top end of the upper screw rod 2 extends out of the top end of the sleeve 8, and is in threaded fit connection with the upper port of the sleeve 8 by utilizing the thread of the upper screw rod; the lower screw rod 10 extends into the lower end of the sleeve 8 and is in threaded fit connection with the lower port of the sleeve 8 by utilizing the thread of the lower screw rod; the lower screw rod 10 is hollow, and the upper screw rod 2 can extend into the lower screw rod 10;
a first clamping structure 12 is arranged in the sleeve 8 and close to the top; the bottom end of the upper screw rod 2 is connected with a second clamping structure 7 which can be matched with the first clamping structure;
when the second clamping structure 7 rises to the first clamping structure 12 along with the rotation of the upper screw rod 2, the second clamping structure is matched with the first clamping structure 12, so that the sleeve 8 rotates along with the upper screw rod 2;
when the sleeve 8 rotates around the lower screw rod 10 and descends to the top of the lower screw rod 10 and the first clamping structure 12 are abutted, the first clamping structure 12 is separated from the second clamping structure 7, so that the upper screw rod 2 rotates and descends to continue to go deep into the lower screw rod 10.
In the ascending process, the upper screw rod 2 is rotated to ascend around the sleeve 8 in the lower screw rod 10, and when the second clamping structure 7 ascends to the first clamping structure 12 along with the rotation of the upper screw rod 2, the second clamping structure is matched with the first clamping structure 12, so that the sleeve 8 rotates around the lower screw rod 10 along with the upper screw rod 2;
in the descending process, the sleeve 8 surrounds the lower screw rod 10 and rotates to descend to the top end of the lower screw rod 10 and the first clamping structure 12 are abutted, the second clamping structure 7 is separated from the first clamping structure 12, and the upper screw rod 2 rotates to descend and continues to extend into the lower screw rod 10.
By adopting the structure, the three-section mechanical lifting mechanism has the advantages of simple adjusting process and higher safety factor, and simultaneously, the three-section mechanical lifting mechanism also enables the lifting amplitude to be larger.
In a preferred embodiment of the first clamping structure, the first clamping structure 12 includes: the meshing inner sleeve 6, the meshing outer sleeve 5, the return spring 4 and the clamp spring 13;
the engagement housing 5 is fixed inside the sleeve 8; a clamp spring 13 is arranged in the meshing outer sleeve 5 and close to the bottom; the meshing inner sleeve 6 is sleeved in the meshing outer sleeve 5; the inner meshing sleeve 6 is provided with an upper structure and a lower structure, the upper part of the inner meshing sleeve 6 is meshed with the outer meshing sleeve 5, and the lower part of the inner meshing sleeve 6 can penetrate through the snap spring 13, so that the snap spring 13 is abutted against the upper part of the inner meshing sleeve 6;
a clamping groove is formed in the meshing outer sleeve 5 close to the bottom, so that the clamping spring 13 can be installed in the clamping groove, and the meshing outer sleeve 5 can be installed inside the sleeve 8 through pouring, welding and other modes.
The engaging inner sleeve 6 is provided with a polygonal inner wall; the second clamping structure 7 is provided with a corresponding polygonal outer wall; for example: the second clamping structure 7 can be a hexagon nut, and the meshing inner sleeve 6 is provided with a hexagonal inner wall matched with the second clamping structure 7; the second clamping structure 7 can also be a triangular nut, a square nut or other special-shaped structures, and the meshing inner sleeve 6 is provided with a polygonal inner wall matched with the second clamping structure 7; the length of the second clamping structure 7 is smaller than that of the lower part of the meshing inner sleeve 6;
the return spring 4 is sleeved outside the upper screw rod 2 and is positioned between the engaging inner sleeve 6 and the upper end opening of the sleeve 8, and the diameter of the return spring 4 is larger than the outer diameter of the engaging inner sleeve 6;
the outer diameter of the lower screw rod 10 is larger than the inner diameter of the lower part of the meshing inner sleeve 6, and the inner diameter of the lower screw rod 10 is smaller than the outer diameter of the lower part of the meshing outer sleeve 5; when the top end of the lower screw rod 10 is abutted to the bottom of the inner meshing sleeve 6, the inner meshing sleeve 6 can be driven to compress the return spring and rise, and then the inner meshing sleeve 6 is separated from the second clamping structure 7.
In the ascending process, the upper screw rod 2 is rotated to ascend around the sleeve 8 in the lower screw rod 10, when the second clamping structure 7 ascends to the meshing inner sleeve 6 along with the rotation of the upper screw rod 2, the upper part of the meshing inner sleeve 6 is in clamping fit with the second clamping structure 7, and meanwhile, the upper screw rod 2 continues to be rotated due to the fact that the upper part of the meshing inner sleeve 6 is meshed with the meshing outer sleeve 5, so that the sleeve 8 rotates and ascends around the lower screw rod 10 along with the upper screw rod 2;
in the descending process, the sleeve 8 centers on down the rotatory decline of lead screw 10 extremely down the top of lead screw 10 with during the lower part butt of meshing endotheca 6, the top of lower lead screw 10 drives meshing endotheca 6 and rises, compresses return spring 4 simultaneously, because the length of second joint structure 7 is less than the length of meshing endotheca 6 lower part, works as the top of lead screw 10 drives meshing endotheca 6 and rises to when the 5 bottoms of meshing overcoat, make second joint structure 7 with meshing endotheca 6 separation, and then make it can continue rotatory decline to stretch into down in the lead screw 10.
Meanwhile, the first clamping structure 12 cannot be disassembled, a machine part with the wall thickness of 1mm-1.7mm made of all steel is adopted to increase the wear resistance and the service life of the product, the second clamping structure 7 is continuously mechanically matched and separated with the meshing inner sleeve 6, and the consistency of the motion track of the second clamping structure is improved by a packaging method.
In a preferred embodiment of the sleeve 8, an upper screw sleeve 3 is fixedly sleeved in an upper port of the sleeve 8, and the upper screw rod 2 is in threaded connection with the upper screw sleeve 3.
The upper thread bushing 3 can be fixed at the upper port of the sleeve 8 in a welding mode; the upper screw sleeve 3 is sleeved and fixed in the upper port of the sleeve 8, so that the structure is more complete, and the processing difficulty of the sleeve 8 is reduced; the upper screw sleeve 3 is provided with internal threads and is in threaded connection with the upper screw rod 2, and the upper screw rod 2 can rotate and lift in the sleeve 8 through the upper screw sleeve 3.
In the preferred embodiment of the sleeve 8, a lower thread sleeve 9 is fixedly sleeved in the lower port of the sleeve 8; the lower screw rod 10 is in threaded connection with the lower screw sleeve 9.
The lower thread bushing 9 can be fixed at the lower port of the sleeve 9 in a welding manner; the lower screw sleeve 9 is sleeved and fixed in the lower port of the sleeve 8, so that the structure is more complete, and the processing difficulty of the sleeve 8 is reduced; the lower screw sleeve 9 is provided with internal threads and is in threaded connection with the lower screw rod 10, so that the sleeve 8 can rotate around the lower screw rod 10 to lift.
In a preferred embodiment of the driving mechanism 1, the driving mechanism 1 is a crank or a stepping motor.
The crank or the stepping motor can be used for controlling the rotation and the lifting of the upper screw rod 2; the crank comprises a rocker and a crank, one end of the rocker is fixedly connected with the crank, the other end of the rocker is provided with a driving groove, the driving groove can be inserted into the top end of the upper screw rod 2, and the upper screw rod is rotated and lifted through forward and reverse rotation of the crank.
In the preferred embodiment of the lower screw 10, a fixing bracket 11 is mounted at the lower end of the lower screw 10. The fixing bracket 11 can be installed at the lower end of the sleeve 10 in a threaded connection manner, and plays a role in fixing the lifting mechanism in the embodiment of the present application.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (6)
1. A lift mechanism, comprising: the device comprises a sleeve (8), an upper screw rod (2) and a lower screw rod (10); the top end of the upper screw rod (2) is provided with a driving mechanism (1) for driving the upper screw rod to rotate; the sleeve (8) is vertically communicated, and the top end of the upper screw rod (2) extends out of the top end of the sleeve (8) and is in threaded connection with the upper port of the sleeve (8); the lower screw rod (10) extends into the sleeve (8) from the bottom end of the sleeve and is in threaded connection with the lower port of the sleeve (8); the lower screw rod (10) is hollow, and the upper screw rod (2) can extend into the lower screw rod (10);
a first clamping structure (12) is arranged in the sleeve (8) and close to the top; the bottom end of the upper screw rod (2) is connected with a second clamping structure (7) which can be matched with the first clamping structure;
when the second clamping structure (7) rises to the first clamping structure (12) along with the rotation of the upper screw rod (2), the second clamping structure is matched with the first clamping structure (12), so that the sleeve (8) rotates along with the upper screw rod (2);
when the sleeve (8) rotates around the lower screw rod (10) and descends to the top of the lower screw rod (10) and is abutted against the first clamping structure (12), the first clamping structure (12) is separated from the second clamping structure (7), so that the upper screw rod (2) rotates and descends to continue to go deep into the lower screw rod (10).
2. The lift mechanism of claim 1, wherein: the first clamping structure comprises: the meshing inner sleeve (6), the meshing outer sleeve (5), the return spring (4) and the clamp spring (13);
the engagement outer sleeve (5) is fixed inside the sleeve (8); a clamp spring (13) is arranged in the meshing outer sleeve (5) and close to the bottom; the meshing inner sleeve (6) is sleeved in the meshing outer sleeve (5); the inner meshing sleeve (6) is provided with an upper structure and a lower structure, the upper part of the inner meshing sleeve (6) is meshed with the outer meshing sleeve (5), and the lower part of the inner meshing sleeve (6) can penetrate through the clamp spring (13), so that the clamp spring (13) is abutted against the upper part of the inner meshing sleeve (6);
the inner meshing sleeve (6) is provided with a polygonal inner wall; the second clamping structure (7) is provided with a corresponding polygonal outer wall, and the length of the second clamping structure (7) is smaller than that of the lower part of the meshing inner sleeve (6);
the return spring (4) is sleeved outside the upper screw rod (2) and is positioned between the meshing inner sleeve (6) and the upper end opening of the sleeve (8), and the diameter of the return spring (4) is larger than the outer diameter of the meshing inner sleeve (6);
the outer diameter of the lower screw rod (10) is larger than the inner diameter of the lower part of the meshing inner sleeve (6), and the inner diameter of the lower screw rod (10) is smaller than the outer diameter of the lower part of the meshing outer sleeve (5).
3. The lifting mechanism according to any one of claims 1 to 2, characterized in that: an upper screw sleeve (3) is fixedly sleeved in an upper port of the sleeve (8), and the upper screw rod (2) is in threaded connection with the upper screw sleeve (3).
4. The lifting mechanism according to any one of claims 1 to 2, characterized in that: a lower screw sleeve (9) is fixedly sleeved in the lower port of the sleeve (8), and the lower screw rod (10) is in threaded connection with the lower screw sleeve (9).
5. The lifting mechanism according to any one of claims 1 to 2, characterized in that: the driving mechanism (1) is a crank or a stepping motor.
6. The lifting mechanism according to any one of claims 1 to 2, characterized in that: and a fixed bracket (11) is arranged at the lower end part of the lower screw rod (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020143186.7U CN211998611U (en) | 2020-01-22 | 2020-01-22 | Lifting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020143186.7U CN211998611U (en) | 2020-01-22 | 2020-01-22 | Lifting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211998611U true CN211998611U (en) | 2020-11-24 |
Family
ID=73419488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020143186.7U Active CN211998611U (en) | 2020-01-22 | 2020-01-22 | Lifting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211998611U (en) |
-
2020
- 2020-01-22 CN CN202020143186.7U patent/CN211998611U/en active Active
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