CN114314451A - Linear transmission assembly and lifting upright post - Google Patents
Linear transmission assembly and lifting upright post Download PDFInfo
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- CN114314451A CN114314451A CN202111596390.XA CN202111596390A CN114314451A CN 114314451 A CN114314451 A CN 114314451A CN 202111596390 A CN202111596390 A CN 202111596390A CN 114314451 A CN114314451 A CN 114314451A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 121
- 238000006073 displacement reaction Methods 0.000 claims abstract description 10
- 230000033001 locomotion Effects 0.000 claims description 10
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- 230000037431 insertion Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
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Abstract
The invention discloses a linear transmission assembly and a lifting upright post, which comprise a transmission sleeve in transmission connection with a driving mechanism; the wire tube is sleeved outside the transmission sleeve, external threads are arranged on the outer side wall of the wire tube, the wire tube and the transmission sleeve synchronously rotate, and the wire tube can axially slide along the transmission sleeve to generate displacement; the transmission nut is connected to the screw pipe in a threaded manner, and when the circumferential rotation of the transmission nut is limited, the transmission nut can move axially relative to the screw pipe to generate displacement; the fixing nut is coaxially connected to the wire tube, and the spiral direction of the internal thread of the fixing nut is opposite to the spiral direction of the external thread of the wire tube; and one end of the lead screw is arranged in the lead screw tube, and the external thread of the lead screw is in threaded connection with the internal thread of the fixed nut. The linear transmission assembly is simple in structure, convenient to assemble and low in production cost.
Description
Technical Field
The invention relates to the technical field of furniture equipment, in particular to a linear transmission assembly and a lifting upright post.
Background
The lifting upright post is widely applied to intelligent office equipment such as an electric lifting table, an electric lifting platform and an electric lifting bed, furniture and the like, and is applied to the fields of medical equipment and the like. The lifting upright column in the prior art generally comprises an inner tube and an outer tube which are nested with each other and can relatively move and stretch, wherein the upper end of the inner tube is connected with an outer shell of a driving mechanism, and the lower end of the outer tube is contacted with the ground; the inner tube is internally provided with a linear transmission assembly, the linear transmission assembly generally comprises a screw rod, a screw tube and a transmission nut, and the screw rod rotates to drive the transmission nut to move along the length direction of the screw rod so as to drive the lifting upright post to lift. The lifting upright column is provided with a forward lifting upright column and an inverted lifting upright column, the forward lifting upright column generally means that the cross section of a pipe fitting of the lifting upright column is small at the top and big at the bottom in a spreading state, and the inverted lifting upright column is just opposite; taking the three-section linear transmission assembly of the prior art as an example, the three-section linear transmission assembly comprises a driving inner screw rod and an outer screw rod sleeved on the inner screw rod, the inner screw rod and the outer screw rod rotate synchronously in a circumferential limiting way and can move relatively in an axial direction, a first nut and a second nut are respectively connected on the inner screw rod and the outer screw rod in a threaded way, and when the rotation trend of the first nut and the second nut is prevented by leg pipes of a lifting upright column, relative displacement occurs between the first nut and the inner screw rod and between the second nut and the outer screw rod; when the linear transmission assembly of the structure is contracted to the shortest height, the first nut and the second nut are respectively positioned at the upper ends of the inner screw rod and the outer screw rod. If the linear transmission assembly of the structure is used for the upright lifting upright, the screw rod needs to be inverted, and the first nut needs to be connected to the lower end of the leg tube through the support sleeve. The structure is complex, the assembly is troublesome and the production cost is high.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provide a linear transmission assembly which is simple in structure, convenient to assemble and low in production cost.
The technical scheme of the invention is to provide a linear transmission assembly with the following structure: it comprises
The transmission sleeve is in transmission connection with the driving mechanism;
the wire tube is sleeved outside the transmission sleeve, external threads are arranged on the outer side wall of the wire tube, the wire tube and the transmission sleeve synchronously rotate, and the wire tube can axially slide along the transmission sleeve to generate displacement; the transmission nut is connected to the screw pipe in a threaded manner, and when the circumferential rotation of the transmission nut is limited, the transmission nut can move axially relative to the screw pipe to generate displacement;
the fixing nut is coaxially connected to the wire tube and synchronously rotates along with the wire tube, and the spiral direction of the internal thread of the fixing nut is opposite to the spiral direction of the external thread of the wire tube;
and one end of the lead screw is arranged in the lead screw tube, and the external thread of the lead screw is in threaded connection with the internal thread of the fixed nut.
Preferably, a plurality of radial lugs distributed along the circumferential direction of the transmission sleeve and extending along the axial direction of the transmission sleeve are arranged on the outer side wall of the transmission sleeve; and the inner peripheral wall of the wire tube is provided with a sliding groove matched with the radial convex block for sliding insertion.
Preferably, one end of the fixing nut close to the driving mechanism is inserted into an inner hole at one end of the wire tube far away from the driving mechanism, and the outer side wall of the fixing nut is tightly matched with the inner wall of the wire tube.
Preferably, a movement gap for the movement of the transmission sleeve is formed between the inner wall of the central hole of the fixing nut and the inner wall of the wire tube.
Preferably, the transmission sleeve is in transmission connection with the output end of the driving mechanism through a coupler.
Preferably, a plurality of convex ribs distributed along the circumferential direction of the fixing nut are arranged on the outer side wall of one end of the fixing nut close to the driving mechanism, and the outer side wall of each convex rib is tightly matched with the inner wall of the wire tube; the connecting holes are connected with connecting columns, the free ends of the connecting columns can be clamped into gaps between adjacent convex ribs of the fixing nuts.
Preferably, the outer end of the screw rod is provided with an annular step, and a plurality of limiting teeth are distributed on the circumferential direction of the annular step.
After adopting the structure, compared with the prior art, the linear transmission assembly has the following advantages:
1. the linear transmission assembly adopts a lead screw for inversion, and a fixing nut is directly connected with a screw tube, so that the fixing nut and the screw tube can synchronously rotate, and the spiral direction of an internal thread of the fixing nut is opposite to the spiral direction of an external thread of the screw tube; when the driving mechanism drives the transmission sleeve to rotate to enable the linear transmission assembly to be unfolded, the transmission nut moves towards one side close to the driving mechanism and the lead screw moves towards one side far away from the driving mechanism due to the fact that the circumferential rotation of the transmission nut and the lead screw is limited, and therefore the linear transmission assembly is unfolded; the linear drive assembly is retracted in an opposite motion to that described above. When the linear transmission assembly contracts to the shortest height, the transmission nut is positioned at the lower end of the wire tube, so that the linear transmission assembly is suitable for being installed on a normally installed lifting upright post; if when the linear transmission assembly is applied to the upright lifting column, the fixing nut is not required to be connected to the lower end of the leg pipe or the vertical pipe through the supporting seat by the linear transmission assembly in the prior art, and the middle vertical pipe of the lifting column is saved compared with the lifting column of the linear transmission assembly with the inverted lead screw in the prior art, so that the linear transmission assembly is simple in structure, convenient to assemble and low in production cost.
2. The radial convex block on the outer side wall of the transmission sleeve is matched with the sliding groove on the inner wall of the wire tube, so that the wire tube can synchronously rotate along with the transmission sleeve and can relatively slide, and the structural stability is good; the fixing nut is directly fixed with the wire tube through the inner hole inserted into the wire tube, so that compared with a linear transmission assembly in the prior art, the supporting seat and a bearing arranged in the supporting seat are saved, and the production cost is greatly reduced; in addition, the fixed nut inserted into the wire tube forms a movement gap for the movement of the transmission sleeve between the inner wall of the central hole of the fixed nut and the inner wall of the wire tube, so that the linear transmission assembly has more compact structure and good transmission stability. The arrangement of the convex rib on the outer side wall of one end of the fixing nut inserted into the wire tube and the arrangement of the connecting column on the wire tube enable the connection between the wire tube and the fixing nut to be firmer and more stable.
Another technical solution of the present invention is to provide a lifting column having the following structure, which includes a driving mechanism, a first vertical pipe and a second vertical pipe that are sequentially sleeved from inside to outside and can relatively slide, and a linear transmission assembly disposed in an inner hole of the first vertical pipe, wherein the linear transmission assembly adopts a linear transmission assembly according to any one of the above technical solutions; one end of the first vertical pipe, which is far away from the driving mechanism, is connected with the transmission nut, and one end of the second vertical pipe, which is far away from the driving mechanism, is connected with the outer end of the screw rod.
After adopting the structure, compared with the prior art, the lifting upright post has the following advantages: the lifting upright post adopts the linear transmission assembly of any technical scheme, so that an intermediate vertical pipe can be saved, the production cost is reduced, the structure is simple, and the assembly is more convenient.
Drawings
FIG. 1 is a schematic structural view of a linear drive assembly of the present invention.
Fig. 2 is an assembly structure diagram of a linear transmission assembly of the present invention.
FIG. 3 is a transverse cross-sectional schematic view of a linear drive assembly of the present invention.
Fig. 4 is a schematic cross-sectional view of a linear drive assembly according to the present invention.
Fig. 5 is an enlarged view of a portion a of fig. 2 of a linear drive assembly of the present invention.
As shown in the figure:
1. the device comprises a transmission sleeve, 100 parts of radial convex blocks, 2 parts of a wire tube, 200 parts of a sliding groove, 201 parts of a connecting hole, 3 parts of a transmission nut, 4 parts of a fixing nut, 400 parts of a convex rib, 5 parts of a lead screw, 500 parts of an annular step, 501 parts of limiting teeth, 6 parts of a coupler.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1 to 5;
the invention relates to a linear transmission assembly which is arranged in a lifting upright post and used for driving an inner pipe and an outer pipe of the lifting upright post to relatively stretch, and the linear transmission assembly structurally comprises a transmission sleeve 1 in transmission connection with a driving mechanism of the lifting upright post, wherein in the embodiment, the transmission sleeve 1 is in transmission connection with the output end of the driving mechanism through a coupler 6; the outer side wall of the transmission sleeve 1 is provided with a plurality of radial projections 100 distributed along the circumferential direction and extending along the axial direction, in other embodiments, the radial projections 100 may also be radial grooves, or the outer side wall of the transmission sleeve 1 is coaxially connected with splines and the like; the outer side wall of the wire tube 2 sleeved outside the transmission sleeve 1 is provided with an external thread, the inner peripheral wall of the wire tube 2 is provided with a sliding groove 200 matched and slidably inserted with the radial bump 100, and in other embodiments, the inner peripheral wall of the wire tube 2 can also be provided with a bulge matched and inserted with a radial groove on the outer side wall of the transmission sleeve 1, or a key groove matched with a spline on the outer side wall of the transmission sleeve 1, and the like. The wire tube 2 and the transmission sleeve 1 rotate synchronously, and the wire tube 2 can slide along the axial direction of the transmission sleeve 1 to generate displacement; the screw tube 2 is in threaded connection with a transmission nut 3, and when the circumferential rotation of the transmission nut 3 is limited, the transmission nut 3 can move axially relative to the screw tube 2 to generate displacement; the fixing nut 4 is coaxially connected to the wire tube 2 and synchronously rotates along with the wire tube 2, and the spiral direction of the internal thread of the fixing nut 4 is opposite to the spiral direction of the external thread of the wire tube 2; and a screw 5, one end of which is arranged in the wire tube 2, wherein the external thread of the screw 5 is in threaded connection with the internal thread of the fixing nut 4, and when the circumferential rotation of the screw 5 is limited, the screw 5 can move axially relative to the wire tube 2 to generate displacement. The outline of the outer side wall of the transmission nut 3 is quadrilateral, and in other embodiments, the outline can also be circular; the end or the outer end that stretches out of lead screw 5 are equipped with annular step 500, and the circumference distribution of annular step 500 has a plurality of spacing tooth 501, and this spacing tooth 501 is used for being connected with the connecting plate of lift stand bottom, prevents that lead screw 5 from rotating, makes lead screw 5's circumferential direction rotatory restricted.
When the driving mechanism drives the transmission sleeve 1 to rotate so as to enable the linear transmission assembly to be unfolded, the transmission nut 3 moves towards one side close to the driving mechanism and the lead screw 5 moves towards one side far away from the driving mechanism due to the fact that the circumferential rotation of the transmission nut 3 and the lead screw 5 is limited, and therefore the linear transmission assembly is unfolded; the linear drive assembly is retracted in an opposite motion to that described above. When the linear transmission assembly is contracted to the shortest height, the transmission nut 3 is positioned at the lower end of the wire tube 2, so that the linear transmission assembly is suitable for being installed on a normally installed lifting upright post; if the linear transmission assembly is applied to the upright lifting column, the fixing nut 4 is not required to be connected to the lower end of the leg pipe or the vertical pipe through the supporting seat by the linear transmission assembly in the prior art, and the middle vertical pipe of the lifting column is saved compared with the lifting column of the linear transmission assembly with the inverted lead screw 5 in the prior art, so that the linear transmission assembly is simple in structure, convenient to assemble and low in production cost.
Referring to fig. 2 and 5, as an embodiment of the present invention; one end of the fixing nut 4 close to the driving mechanism is inserted into an inner hole at one end of the wire tube 2 far away from the driving mechanism, and the outer side wall of the fixing nut 4 is tightly matched with the inner wall of the wire tube 2. Specifically, a plurality of convex ribs 400 distributed along the circumferential direction of the fixing nut 4 are arranged on the outer side wall of one end of the fixing nut 4 close to the driving mechanism, and the outer side wall of each convex rib 400 is tightly matched with the inner wall of the wire tube 2; the wire tube 2 is radially provided with a connecting hole 201, and the connecting hole 201 is internally connected with a connecting column of which the free end can be clamped into a gap between adjacent convex ribs 400 of the fixing nut 4. In this embodiment, the insertion end of the fixing nut 4 is in riveted tight fit with the inner hole of the wire tube 2, and in other embodiments, welding, threaded connection, and the like may also be adopted. Connecting hole 201 be the screw hole, the spliced pole be connecting screw, the free end card of connecting screw is gone into the space between the adjacent protruding muscle 400 of fixation nut 4 to further prevent that fixation nut 4 from taking place the pine and taking off or rotate, the firm in connection nature is good. In addition, in the embodiment, a movement gap for the movement of the transmission sleeve 1 is formed between the inner wall of the central hole of the fixing nut 4 and the inner wall of the wire tube 2; therefore, the linear transmission assembly has a more compact structure and good transmission stability.
The embodiment discloses a lifting upright post, which comprises a driving mechanism, a first vertical pipe, a second vertical pipe and a linear transmission assembly, wherein the first vertical pipe and the second vertical pipe are sleeved in sequence from inside to outside and can slide relatively, the linear transmission assembly is arranged in an inner hole of the first vertical pipe, and the linear transmission assembly adopts the linear transmission assembly in any one of the embodiments; one end of the first vertical pipe, which is far away from the driving mechanism, is connected with the transmission nut 3, and one end of the second vertical pipe, which is far away from the driving mechanism, is connected with the outer end of the screw rod 5. The lifting upright post adopts the linear transmission assembly of any technical scheme, so that an intermediate vertical pipe can be saved, the production cost is reduced, the structure is simple, and the assembly is more convenient. The driving mechanism can be a driving motor or a manual driving rocking handle.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A linear drive assembly, characterized by: it comprises
The transmission sleeve is in transmission connection with the driving mechanism;
the wire tube is sleeved outside the transmission sleeve, external threads are arranged on the outer side wall of the wire tube, the wire tube and the transmission sleeve synchronously rotate, and the wire tube can axially slide along the transmission sleeve to generate displacement; the transmission nut is connected to the screw pipe in a threaded manner, and when the circumferential rotation of the transmission nut is limited, the transmission nut can move axially relative to the screw pipe to generate displacement;
the fixing nut is coaxially connected to the wire tube and synchronously rotates along with the wire tube, and the spiral direction of the internal thread of the fixing nut is opposite to the spiral direction of the external thread of the wire tube;
and one end of the lead screw is arranged in the lead screw tube, and the external thread of the lead screw is in threaded connection with the internal thread of the fixed nut.
2. A linear drive assembly as set forth in claim 1, wherein: the outer side wall of the transmission sleeve is provided with a plurality of radial lugs which are distributed along the circumferential direction of the transmission sleeve and extend along the axial direction of the transmission sleeve; and the inner peripheral wall of the wire tube is provided with a sliding groove matched with the radial convex block for sliding insertion.
3. A linear drive assembly as set forth in claim 1, wherein: one end of the fixing nut close to the driving mechanism is inserted into an inner hole at one end of the wire tube far away from the driving mechanism, and the outer side wall of the fixing nut is tightly matched with the inner wall of the wire tube.
4. A linear drive assembly as set forth in claim 3, wherein: and a movement gap for the movement of the transmission sleeve is formed between the inner wall of the central hole of the fixing nut and the inner wall of the wire tube.
5. A linear drive assembly as set forth in claim 1, wherein: the transmission sleeve is in transmission connection with the output end of the driving mechanism through a coupler.
6. A linear drive assembly as set forth in claim 3, wherein: the outer side wall of one end, close to the driving mechanism, of the fixing nut is provided with a plurality of convex ribs distributed along the circumferential direction of the fixing nut, and the outer side walls of the convex ribs are tightly matched with the inner wall of the wire tube; the connecting holes are connected with connecting columns, the free ends of the connecting columns can be clamped into gaps between adjacent convex ribs of the fixing nuts.
7. A linear drive assembly as set forth in claim 1, wherein: the outer end of the lead screw is provided with an annular step, and a plurality of limiting teeth are distributed on the circumferential direction of the annular step.
8. The utility model provides a lifting column, it includes actuating mechanism, from inside to outside suit in proper order and relative slip's first riser and second riser and set up the linear transmission assembly in first riser hole, its characterized in that: the linear transmission assembly adopts the linear transmission assembly as claimed in any one of the claims 1 to 7; one end of the first vertical pipe, which is far away from the driving mechanism, is connected with the transmission nut, and one end of the second vertical pipe, which is far away from the driving mechanism, is connected with the outer end of the screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111596390.XA CN114314451A (en) | 2021-12-24 | 2021-12-24 | Linear transmission assembly and lifting upright post |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111596390.XA CN114314451A (en) | 2021-12-24 | 2021-12-24 | Linear transmission assembly and lifting upright post |
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| Publication Number | Publication Date |
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| CN114314451A true CN114314451A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111596390.XA Pending CN114314451A (en) | 2021-12-24 | 2021-12-24 | Linear transmission assembly and lifting upright post |
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| CN (1) | CN114314451A (en) |
Citations (10)
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|---|---|---|---|---|
| CN201705877U (en) * | 2010-03-29 | 2011-01-12 | 浙江新益控制***有限公司 | Three-section type synchronous linear lifting column body |
| EP2594157A2 (en) * | 2011-11-16 | 2013-05-22 | Paul Hettich GmbH & Co. KG | Telescopic lifting column of a piece of furniture |
| CN206142727U (en) * | 2016-09-20 | 2017-05-03 | 浙江捷昌线性驱动科技股份有限公司 | Lifting upright column |
| CN106641148A (en) * | 2017-01-10 | 2017-05-10 | 浙江捷昌线性驱动科技股份有限公司 | Drive assembly and elevating column |
| CN209800461U (en) * | 2018-10-10 | 2019-12-17 | 浙江捷昌线性驱动科技股份有限公司 | Lifting upright post |
| CN110897335A (en) * | 2019-11-22 | 2020-03-24 | 绍兴市耐特驱动科技有限公司 | Lifting upright post |
| CN110925376A (en) * | 2019-10-25 | 2020-03-27 | 宁波海仕凯驱动科技有限公司 | Transmission device with large self-locking force and electric lifting upright post |
| CN111120605A (en) * | 2020-01-10 | 2020-05-08 | 浙江乐歌智能驱动科技有限公司 | Linear transmission assembly and lifting upright post |
| CN210944760U (en) * | 2019-08-26 | 2020-07-07 | 宁波海仕凯驱动科技有限公司 | Lifting upright post with simple structure |
| CN216687375U (en) * | 2021-12-24 | 2022-06-07 | 乐歌人体工学科技股份有限公司 | Linear transmission assembly and lifting stand column |
-
2021
- 2021-12-24 CN CN202111596390.XA patent/CN114314451A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201705877U (en) * | 2010-03-29 | 2011-01-12 | 浙江新益控制***有限公司 | Three-section type synchronous linear lifting column body |
| EP2594157A2 (en) * | 2011-11-16 | 2013-05-22 | Paul Hettich GmbH & Co. KG | Telescopic lifting column of a piece of furniture |
| CN206142727U (en) * | 2016-09-20 | 2017-05-03 | 浙江捷昌线性驱动科技股份有限公司 | Lifting upright column |
| CN106641148A (en) * | 2017-01-10 | 2017-05-10 | 浙江捷昌线性驱动科技股份有限公司 | Drive assembly and elevating column |
| US20190360567A1 (en) * | 2017-01-10 | 2019-11-28 | Zhejiang Jiecang Linear Motion Technology Co., Ltd. | Transmission assembly and lifting column |
| CN209800461U (en) * | 2018-10-10 | 2019-12-17 | 浙江捷昌线性驱动科技股份有限公司 | Lifting upright post |
| CN210944760U (en) * | 2019-08-26 | 2020-07-07 | 宁波海仕凯驱动科技有限公司 | Lifting upright post with simple structure |
| CN110925376A (en) * | 2019-10-25 | 2020-03-27 | 宁波海仕凯驱动科技有限公司 | Transmission device with large self-locking force and electric lifting upright post |
| CN110897335A (en) * | 2019-11-22 | 2020-03-24 | 绍兴市耐特驱动科技有限公司 | Lifting upright post |
| CN111120605A (en) * | 2020-01-10 | 2020-05-08 | 浙江乐歌智能驱动科技有限公司 | Linear transmission assembly and lifting upright post |
| CN216687375U (en) * | 2021-12-24 | 2022-06-07 | 乐歌人体工学科技股份有限公司 | Linear transmission assembly and lifting stand column |
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