CN111120604A - Synchronous different-lead linear transmission assembly and lifting upright post - Google Patents
Synchronous different-lead linear transmission assembly and lifting upright post Download PDFInfo
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- CN111120604A CN111120604A CN202010026631.6A CN202010026631A CN111120604A CN 111120604 A CN111120604 A CN 111120604A CN 202010026631 A CN202010026631 A CN 202010026631A CN 111120604 A CN111120604 A CN 111120604A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 108
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/20—Telescopic guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/12—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks
- B66F7/14—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks screw operated
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Structural Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a synchronous different-lead linear transmission assembly and a lifting upright post, wherein the synchronous different-lead linear transmission assembly comprises a lead screw, a first wire tube, a second wire tube and a third wire tube; the third wire tube, the second wire tube, the first wire tube and the lead screw can synchronously rotate and can relatively slide to generate displacement, and the lead screw, the first wire tube, the second wire tube and the third wire tube drive the second vertical tube, the third vertical tube and the fourth vertical tube to relatively stretch when relatively sliding. Therefore, the synchronous different-lead linear transmission assembly and the lifting upright post increase the stroke of the lifting upright post, meet the requirement of maximizing the stroke of the lifting upright post by people and reasonably utilize the internal space.
Description
Technical Field
The invention relates to the technical field of lifting tables, in particular to a synchronous different-lead linear transmission assembly and a lifting upright post.
Background
The lifting upright column in the prior art generally comprises a driving mechanism, an inner tube, a middle tube and an outer tube which are nested with each other and can relatively move and stretch, the upper end of the inner tube is connected with a shell of the driving mechanism, and the lower end of the outer tube is contacted with the ground; the inner tube is internally provided with a transmission assembly, the transmission assembly comprises a square supporting tube, a first base is connected in an inner hole at the upper end of the supporting tube, a screw rod is connected in a central hole of the first base in a threaded manner, and the first base and the supporting tube move along the length direction of the screw rod under the rotation of the screw rod; the supporting tube is in sliding fit with a square tube sleeved on the screw rod, the lower end of the square tube is connected with the lower end of the outer tube through a connecting plate, a second base is connected in an inner hole of the square tube, a wire tube sleeved on the screw rod is connected in a central hole of the second base in a threaded manner, the wire tube and the screw rod rotate synchronously, and the wire tube can slide relative to the screw rod; the driving mechanism drives the screw rod to rotate, so that the supporting tube and the first base move along the axial direction of the screw rod, and meanwhile, the screw tube rotates to enable the square tube and the second base to move along the length direction of the supporting tube, so that the expansion and contraction of the inner tube and the outer tube of the lifting upright post are realized; the central hole of the base is in threaded connection with the lead screw or the screw tube, and the central hole of the base is internally provided with a nut in threaded connection with the lead screw or the screw tube. In order to maximize the stroke of the lifting upright column, the length of a lead screw and a lead screw pipe adopted by a transmission assembly of the lifting upright column is the same, namely the total lead of the lead screw and the lead screw pipe is the same, and in addition, because the nut in the central hole of each base has certain thickness, the space utilization rate in the transmission assembly is not high, and waste is caused. And the lifting upright post in the prior art is generally formed by mutually nesting two or three sections of pipe fittings, and the maximum stroke of the lifting upright post is far from meeting the requirements of people after the lowest height of the lifting upright post is determined. Therefore, how to provide a transmission assembly capable of maximizing the stroke of the lifting column is a technical problem to be solved urgently at present.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provide a synchronous different-lead linear transmission assembly which can increase the stroke of a lifting upright column, meet the requirement of people on the maximization of the stroke of the lifting upright column and reasonably utilize the internal space.
The technical scheme of the invention is to provide a synchronous different-lead linear transmission assembly with the following structure: it comprises
The screw rod is in transmission connection with the driving mechanism, a first transmission nut is in threaded connection with the screw rod, and a first connecting seat capable of limiting the rotation of the first transmission nut is connected with the first transmission nut;
the first wire tube is provided with external threads on the outer side wall, the first wire tube is sleeved on the lead screw and can synchronously rotate with the lead screw, the first wire tube and the lead screw can relatively slide along the axial direction to generate displacement, the first wire tube is in threaded connection with a second transmission nut, and the second transmission nut is connected with a second connecting seat capable of limiting the rotation of the second transmission nut;
the outer side wall of the second wire pipe is provided with external threads, the second wire pipe is sleeved on the first wire pipe, the second wire pipe can synchronously rotate with the first wire pipe, the second wire pipe and the first wire pipe can relatively slide along the axial direction to generate displacement, the second wire pipe is in threaded connection with a third transmission nut, and the third transmission nut is connected with a third connecting seat capable of limiting the rotation of the third transmission nut;
the third wire tube is provided with external threads on the outer side wall thereof, the third wire tube is sleeved on the second wire tube, the third wire tube can synchronously rotate with the second wire tube, the third wire tube and the second wire tube can relatively slide along the axial direction to generate displacement, the third wire tube is in threaded connection with a fourth transmission nut, and the fourth transmission nut is sleeved with an inner tube capable of limiting the rotation of the fourth transmission nut.
Preferably, the lengths of the lead screw, the first wire tube, the second wire tube and the third wire tube are sequentially decreased progressively.
Preferably, the total lead of the screw, the first wire tube, the second wire tube and the third wire tube is decreased in sequence.
Preferably, the first wire tube is sleeved with a first bearing, and the first bearing is fixedly connected in the first connecting seat and used for enabling the first wire tube to be rotatably connected with the first connecting seat through the first bearing and enabling the first wire tube and the first connecting seat to move synchronously along the axial direction.
Preferably, the second wire tube is sleeved with a second bearing, and the second bearing is fixedly connected in the second connecting seat and used for enabling the second wire tube to be rotatably connected with the second connecting seat through the second bearing and enabling the second wire tube and the second connecting seat to move synchronously along the axial direction.
Preferably, the third wire tube is sleeved with a third bearing, and the third bearing is fixedly connected in the third connecting seat and used for enabling the third wire tube to be rotatably connected with the third connecting seat through the third bearing and enabling the third wire tube and the third connecting seat to move synchronously along the axial direction.
Preferably, a plurality of sliding grooves which extend along the axial direction of the first wire tube, the second wire tube and the third wire tube and are distributed along the circumferential direction of the first wire tube, the second wire tube and the third wire tube are arranged on the inner circumferential wall of the first wire tube, the second wire tube and the third wire tube; the lower end of the screw rod is connected with a first sliding block, the outer circumferential wall of the first sliding block is provided with a radial bump correspondingly clamped with the sliding groove on the inner circumferential wall of the first wire tube, and the outer side wall of the radial bump on the first sliding block is in clearance fit with the inner wall of the sliding groove on the first wire tube; the lower end of the first wire tube is connected with a second sliding block, the outer circumferential wall of the second sliding block is provided with a radial bump which is correspondingly clamped with the sliding groove on the inner circumferential wall of the second wire tube, and the outer side wall of the radial bump on the second sliding block is in clearance fit with the inner wall of the sliding groove on the second wire tube; the lower end of the second wire tube is connected with a third sliding block, the outer circumferential wall of the third sliding block is provided with a radial convex block which is correspondingly clamped with the sliding groove on the inner circumferential wall of the third wire tube, and the outer side wall of the radial convex block on the third sliding block is in clearance fit with the inner wall of the sliding groove on the third wire tube.
After adopting the structure, compared with the prior art, the synchronous different-lead linear transmission assembly has the following advantages:
1. the synchronous different-lead linear transmission assembly is composed of a third wire tube, a second wire tube, a first wire tube and a lead screw which are sequentially sleeved from outside to inside, wherein the third wire tube, the second wire tube, the first wire tube and the lead screw can synchronously rotate and can relatively slide to generate displacement; therefore, the stroke of the synchronous different-lead linear transmission assembly is large, in other words, when the first wire tube, the second wire tube, the third wire tube and the lead screw of the synchronous different-lead linear transmission assembly slide relatively and are completely contracted, the whole length is short, so that the stroke of the synchronous different-lead linear transmission assembly is large; that is, compared with the linear transmission assembly in the prior art, under the condition that the fully-extended heights of the linear transmission assembly are equal, the length of the synchronous different-lead linear transmission assembly in the fully-retracted state is far shorter than that of the linear transmission assembly in the prior art; in other words, with the fully retracted heights of the linear drive assemblies being equal, the length of the linear drive assembly of the present invention when fully extended is much greater than the length of the prior art linear drive assembly when fully extended; therefore, the stroke of the synchronous different-lead linear transmission assembly is large. The synchronous different-lead linear transmission assembly can increase the stroke of the lifting upright column and meet the requirement of people on the stroke maximization of the lifting upright column.
2. The lengths of the lead screw, the first wire tube, the second wire tube and the third wire tube are sequentially decreased progressively; or the total lead of the lead screw, the first wire tube, the second wire tube and the third wire tube is sequentially decreased progressively. Therefore, under the condition that the first connecting seat, the second connecting seat and the third connecting seat are objectively thick or the first transmission nut, the second transmission nut, the third transmission nut and the fourth transmission nut are objectively thick, the internal space of the linear transmission assembly can be reasonably utilized, the linear transmission assembly is more compact in whole, good in transmission stability and light in weight, and the material cost is saved.
3. The driving mechanism drives the screw rod to rotate, so that the first screw tube, the second screw tube and the third screw tube synchronously rotate along with the screw rod, under the condition that the first transmission nut, the second transmission nut, the third transmission screw and the fourth transmission nut are respectively limited to rotate by the first connecting seat, the second connecting seat, the third connecting seat and the inner tube, the first screw tube can relatively slide along the axial direction relative to the screw rod and the second screw tube relative to the first screw tube and the third screw tube relative to the second screw tube to generate displacement, so that the telescopic action of the transmission assembly is realized, and similarly, the first connecting seat, the second connecting seat, the third connecting seat and the inner tube can relatively generate displacement; the arrangement is that the stroke of the first connecting seat, the second connecting seat, the third connecting seat and the inner pipe in relative movement is larger.
4. The first wire tube is rotatably connected with the first connecting seat through the first bearing and enables the first wire tube and the first connecting seat to move synchronously along the axial direction, the second wire tube is rotatably connected with the second connecting seat through the second bearing and enables the second wire tube and the second connecting seat to move synchronously along the axial direction, and the third wire tube is rotatably connected with the third connecting seat through the third bearing and enables the third wire tube and the third connecting seat to move synchronously along the axial direction. The arrangement further improves the stability of the action of the transmission assembly.
Another technical solution of the present invention is to provide a lifting column having the following structure, which includes a first vertical pipe, a second vertical pipe, a third vertical pipe and a fourth vertical pipe sequentially sleeved from outside to inside, a housing fixedly connected to an upper end of the first vertical pipe, a driving mechanism disposed in the housing, and a linear transmission assembly in transmission connection with the driving mechanism, and is characterized in that: the linear transmission assembly adopts the synchronous different-lead linear transmission assembly according to any technical scheme; the first connecting seat is connected with the second vertical pipe, the second connecting seat is connected with the third vertical pipe, and the third connecting seat is connected with the fourth vertical pipe.
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 one of the technical schemes, so that the lifting upright post is provided with five sections of pipes, namely a first upright pipe, a second upright pipe, a third upright pipe, a fourth upright pipe and an inner pipe, and the second upright pipe, the third upright pipe, the fourth upright pipe and the inner pipe are all telescopic relative to the first upright pipe to generate displacement, so that the stroke of the lifting upright post is increased, and the stroke maximization requirement of people on the lifting upright post is met.
Drawings
Fig. 1 is a schematic structural view of the synchronous differential lead linear transmission assembly of the present invention.
Fig. 2 is a schematic cross-sectional structural view of the synchronous differential lead linear transmission assembly of the present invention.
Fig. 3 is a schematic structural diagram of the lifting column of the present invention.
Fig. 4 is a schematic sectional structure view of the lifting column of the present invention.
As shown in the figure:
1. the lead screw, 100, first slider, 2, first silk pipe, 200, second slider, 3, second silk pipe, 300, third slider, 4, third silk pipe, 5, inner tube, 6, first connecting seat, 600, second connecting seat, 601, third connecting seat, 7, first drive nut, 700, second drive nut, 701, third drive nut, 702, fourth drive nut, 8, first bearing, 800, second bearing, 801, third bearing, 9, first riser, 900, second riser, 901, third riser, 902, fourth riser, 10, actuating mechanism.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
See fig. 1-2;
the invention relates to a synchronous different-lead 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 synchronous different-lead linear transmission assembly structurally comprises a lead screw 1 in transmission connection with a driving mechanism 10, wherein the lead screw 1 is in threaded connection with a first transmission nut 7, and the first transmission nut 7 is connected with a first connecting seat 6 capable of limiting the first transmission nut 7 to rotate; the outer side wall of the first wire tube 2 is provided with an external thread, the first wire tube 2 is sleeved on the screw rod 1, the first wire tube 2 can synchronously rotate with the screw rod 1, the first wire tube 2 and the screw rod 1 can relatively slide along the axial direction to generate displacement, the first wire tube 2 is in threaded connection with a second transmission nut 700, and the second transmission nut 700 is connected with a second connecting seat 600 capable of limiting the rotation of the second transmission nut 700; the outer side wall of the second wire tube 3 is provided with an external thread, the second wire tube 3 is sleeved on the first wire tube 2, the second wire tube 3 can synchronously rotate with the first wire tube 2, the second wire tube 3 and the first wire tube 2 can relatively slide along the axial direction to generate displacement, the second wire tube 3 is in threaded connection with a third transmission nut 701, and the third transmission nut 701 is connected with a third connecting seat 601 capable of limiting the rotation of the third transmission nut 701; the outer side wall of the third wire tube 4 is provided with external threads, the third wire tube 4 is sleeved on the second wire tube 3, the third wire tube 4 can synchronously rotate with the second wire tube 3, the third wire tube 4 and the second wire tube 3 can relatively slide along the axial direction to generate displacement, the third wire tube 3 is in threaded connection with a fourth transmission nut 702, and the fourth transmission nut 702 is sleeved with an inner tube 5 capable of limiting the rotation of the fourth transmission nut 702. The driving mechanism of the invention is a driving motor.
A plurality of sliding grooves which extend along the axial direction and are distributed along the circumferential direction are arranged on the inner circumferential walls of the first wire tube 2, the second wire tube 3 and the third wire tube 4; the lower end of the screw rod 1 is connected with a first sliding block 100, the outer circumferential wall of the first sliding block 100 is provided with a radial bump which is correspondingly clamped with the sliding groove on the inner circumferential wall of the first wire tube 2, and the outer side wall of the radial bump on the first sliding block 100 is in clearance fit with the inner wall of the sliding groove on the first wire tube 2; the lower end of the first wire tube 2 is connected with a second sliding block 200, the outer circumferential wall of the second sliding block 200 is provided with a radial convex block correspondingly clamped with the sliding groove on the inner circumferential wall of the second wire tube 3, and the outer side wall of the radial convex block on the second sliding block 200 is in clearance fit with the inner wall of the sliding groove on the second wire tube 3; the lower end of the second wire tube 3 is connected with a third sliding block 300, the outer circumferential wall of the third sliding block 300 is provided with a radial convex block correspondingly clamped with the sliding groove on the inner circumferential wall of the third wire tube 4, and the outer side wall of the radial convex block on the third sliding block 300 is in clearance fit with the inner wall of the sliding groove on the third wire tube 4.
The driving mechanism 10 drives the screw rod 1 to rotate, so that the first screw tube 2, the second screw tube 3 and the third screw tube 4 synchronously rotate along with the screw rod 1, under the condition that the first transmission nut 7, the second transmission nut 700, the third transmission nut 701 and the fourth transmission nut 702 are respectively limited by the first connecting seat 6, the second connecting seat 600, the third connecting seat 601 and the inner tube 5 to rotate, the first screw tube 2 can relatively slide along the axial direction relative to the screw rod 1 and the second screw tube 3 relative to the first screw tube 2 and the third screw tube 4 relative to the second screw tube 3 to generate displacement, so as to realize the telescopic action of the transmission assembly, and similarly, the first connecting seat 6, the second connecting seat 600, the third connecting seat 601 and the inner tube 5 can relatively displace; with this arrangement, the stroke of the first connecting seat 6, the second connecting seat 600, the third connecting seat 601 and the inner tube 5 when they move relatively is made large.
The lengths of the screw rod 1, the first wire tube 2, the second wire tube 3 and the third wire tube 4 are sequentially decreased progressively. The total lead of the screw rod 1, the first wire tube 2, the second wire tube 3 and the third wire tube 4 is sequentially decreased progressively. Therefore, under the condition that the first connecting seat 6, the second connecting seat 600 and the third connecting seat 601 objectively have thicknesses or under the condition that the first transmission nut 7, the second transmission nut 700, the third transmission nut 701 and the fourth transmission nut 702 objectively have thicknesses, the internal space of the linear transmission assembly can be reasonably utilized, so that the linear transmission assembly is more compact as a whole, good in transmission stability, light in weight and material cost saving.
The first wire tube 2 is sleeved with a first bearing 8, the first bearing 8 is fixedly connected in the first connecting seat 6, and the first wire tube 2 is rotatably connected with the first connecting seat 6 through the first bearing 8 and enables the first wire tube 2 and the first connecting seat 6 to move synchronously along the axial direction. The second wire tube 3 is sleeved with a second bearing 800, the second bearing 800 is fixedly connected in the second connecting seat 600, and is used for enabling the second wire tube 3 to be rotatably connected with the second connecting seat 600 through the second bearing 800 and enabling the second wire tube 3 and the second connecting seat 600 to move synchronously along the axial direction. The third wire tube 4 is sleeved with a third bearing 801, the third bearing 801 is fixedly connected in the third connecting seat 601, and is used for rotatably connecting the third wire tube 4 with the third connecting seat 601 through the third bearing 801 and enabling the third wire tube 4 and the third connecting seat 601 to synchronously move along the axial direction. The arrangement further improves the stability of the action of the transmission assembly.
See fig. 3-4; the invention relates to a lifting upright post, which comprises a first vertical pipe 9, a second vertical pipe 900, a third vertical pipe 901 and a fourth vertical pipe 902 which are sequentially sleeved from outside to inside, a shell 1 fixedly connected with the upper end of the first vertical pipe 9, a driving mechanism arranged in the shell 1 and a linear transmission assembly in transmission connection with the driving mechanism, wherein the linear transmission assembly adopts a synchronous different-lead linear transmission assembly according to any technical scheme of the embodiment; the first connecting seat 6 is connected to the second riser 900, the second connecting seat 600 is connected to the third riser 901, and the third connecting seat 601 is connected to the fourth riser 902. The lifting upright column adopts the linear transmission assembly described in any one of the above technical schemes, so that the lifting upright column is provided with five sections of pipes, namely a first upright pipe 9, a second upright pipe 900, a third upright pipe 901, a fourth upright pipe 902 and an inner pipe 5, and the second upright pipe 900, the third upright pipe 901, the fourth upright pipe 902 and the inner pipe 5 are all telescopic relative to the first upright pipe 9 to displace, thereby increasing the stroke of the lifting upright column and meeting the maximum demand of people on the stroke of the lifting upright column.
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 synchronous different-lead linear transmission assembly is characterized in that: it comprises
The screw rod is in transmission connection with the driving mechanism, a first transmission nut is in threaded connection with the screw rod, and a first connecting seat capable of limiting the rotation of the first transmission nut is connected with the first transmission nut;
the first wire tube is provided with external threads on the outer side wall, the first wire tube is sleeved on the lead screw and can synchronously rotate with the lead screw, the first wire tube and the lead screw can relatively slide along the axial direction to generate displacement, the first wire tube is in threaded connection with a second transmission nut, and the second transmission nut is connected with a second connecting seat capable of limiting the rotation of the second transmission nut;
the outer side wall of the second wire pipe is provided with external threads, the second wire pipe is sleeved on the first wire pipe, the second wire pipe can synchronously rotate with the first wire pipe, the second wire pipe and the first wire pipe can relatively slide along the axial direction to generate displacement, the second wire pipe is in threaded connection with a third transmission nut, and the third transmission nut is connected with a third connecting seat capable of limiting the rotation of the third transmission nut;
the third wire tube is provided with external threads on the outer side wall thereof, the third wire tube is sleeved on the second wire tube, the third wire tube can synchronously rotate with the second wire tube, the third wire tube and the second wire tube can relatively slide along the axial direction to generate displacement, the third wire tube is in threaded connection with a fourth transmission nut, and the fourth transmission nut is sleeved with an inner tube capable of limiting the rotation of the fourth transmission nut.
2. The synchronous, differential-lead linear drive assembly of claim 1, wherein: the lengths of the lead screw, the first wire tube, the second wire tube and the third wire tube are sequentially decreased progressively.
3. The synchronous, differential-lead linear drive assembly of claim 1, wherein: and the total lead of the screw rod, the first wire tube, the second wire tube and the third wire tube is sequentially decreased progressively.
4. The synchronous, differential-lead linear drive assembly of claim 1, wherein: the first wire pipe is sleeved with a first bearing, and the first bearing is fixedly connected in the first connecting seat and used for enabling the first wire pipe to be rotatably connected with the first connecting seat through the first bearing and enabling the first wire pipe and the first connecting seat to move synchronously along the axial direction.
5. The synchronous, differential-lead linear drive assembly of claim 4, wherein: the second wire tube is sleeved with a second bearing, and the second bearing is fixedly connected in the second connecting seat and used for enabling the second wire tube to be rotatably connected with the second connecting seat through the second bearing and enabling the second wire tube and the second connecting seat to move synchronously along the axial direction.
6. The synchronous, differential-lead linear drive assembly of claim 5, wherein: the third wire tube is sleeved with a third bearing, and the third bearing is fixedly connected in a third connecting seat and used for enabling the third wire tube to be rotatably connected with the third connecting seat through the third bearing and enabling the third wire tube and the third connecting seat to move synchronously along the axial direction.
7. The synchronous, differential-lead linear drive assembly of claim 1, wherein: the inner circular peripheral walls of the first wire pipe, the second wire pipe and the third wire pipe are respectively provided with a plurality of sliding grooves which extend along the axial direction of the first wire pipe, the second wire pipe and the third wire pipe and are distributed along the circumferential direction of the first wire pipe, the second wire pipe and the third wire pipe; the lower end of the screw rod is connected with a first sliding block, the outer circumferential wall of the first sliding block is provided with a radial bump correspondingly clamped with the sliding groove on the inner circumferential wall of the first wire tube, and the outer side wall of the radial bump on the first sliding block is in clearance fit with the inner wall of the sliding groove on the first wire tube; the lower end of the first wire tube is connected with a second sliding block, the outer circumferential wall of the second sliding block is provided with a radial bump which is correspondingly clamped with the sliding groove on the inner circumferential wall of the second wire tube, and the outer side wall of the radial bump on the second sliding block is in clearance fit with the inner wall of the sliding groove on the second wire tube; the lower end of the second wire tube is connected with a third sliding block, the outer circumferential wall of the third sliding block is provided with a radial convex block which is correspondingly clamped with the sliding groove on the inner circumferential wall of the third wire tube, and the outer side wall of the radial convex block on the third sliding block is in clearance fit with the inner wall of the sliding groove on the third wire tube.
8. The utility model provides a lifting column, it includes outside-in first riser, second riser, third riser and the fourth riser of suit in proper order, with first riser upper end fixed connection's shell, set up actuating mechanism in the shell and with the linear transmission assembly that actuating mechanism transmission is connected, its characterized in that: the linear transmission assembly adopts the synchronous different-lead linear transmission assembly as claimed in any one of the claims 1 to 7; the first connecting seat is connected with the second vertical pipe, the second connecting seat is connected with the third vertical pipe, and the third connecting seat is connected with the fourth vertical pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010026631.6A CN111120604A (en) | 2020-01-10 | 2020-01-10 | Synchronous different-lead linear transmission assembly and lifting upright post |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010026631.6A CN111120604A (en) | 2020-01-10 | 2020-01-10 | Synchronous different-lead linear transmission assembly and lifting upright post |
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| CN202010026631.6A Pending CN111120604A (en) | 2020-01-10 | 2020-01-10 | Synchronous different-lead linear transmission assembly and lifting upright post |
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- 2020-01-10 CN CN202010026631.6A patent/CN111120604A/en active Pending
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| DE102007039823A1 (en) * | 2007-08-23 | 2009-02-26 | Stabilus Gmbh | Drive device for hatch of motor vehicle, has spindle drive comprising threaded spindle with thread, which has lead changing over length of spindle, where spindle drive is rotatably driveable by rotary drive |
| 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 |
| CN109812556A (en) * | 2019-01-31 | 2019-05-28 | 宁波海仕凯驱动科技有限公司 | A kind of drive assembly and lifting column |
| CN209712165U (en) * | 2019-03-06 | 2019-12-03 | 江苏雷利电机股份有限公司 | Lift drive mechanism and lifting frame body |
| CN211693404U (en) * | 2020-01-10 | 2020-10-16 | 浙江乐歌智能驱动科技有限公司 | Synchronous different-lead linear transmission assembly and lifting upright post |
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