CN206142727U - Lifting upright column - Google Patents

Abstract

The utility model provides a lifting upright column, second lead screw and drive arrangement in first lead screw is located to inner tube, well pipe, outer tube, first lead screw, cover, inner tube connect with well pipe box and can follow in the reciprocating axially of pipe, well pipe cup joints and can follow the reciprocating axially of outer tube with the outer tube, first lead screw and interior union coupling, second lead screw and outer union coupling, drive arrangement locate in the inner tube and with first lead screw, the cooperation of the 2nd screw drive with drive inner tube, well pipe and outer tube reciprocating axially. Through in locating drive arrangement the inner tube for the coincidence of lifting upright column's stroke and lifting upright column's installation distance part has reduced lifting upright column's axial installation size, and through two rhizoid poles each other the cover increased the height that lifting upright column can rise together, has reduced the collapsible height of lifting upright column, thereby be convenient for the accomodating of lifting upright column.

Description

A kind of lifting column

Technical field

This utility model is related to mechanical field, more particularly to a kind of lifting column.

Background technology

With extensive application of the desk in people's work, studying and living, desk such as computer desk, desk, desk etc. Many convenience are brought to us, with the application demand of people, more and more higher is also required that to comfortable, the facility of desk, be full The demand of sufficient people, the desk extremely people that can adjust height like, then occur in that adjustable for height desk.

Existing lowering or hoisting gear generally comprises lifting column, but existing lifting column has some problems, such as lifting column Setting height(from bottom) it is too high, be not easy to the storage of lowering or hoisting gear；Secondly, when lifting column rises, driving means can be exposed, from And affect the aesthetics of lifting column；Further, driving means expose, and water, dust and other impurities can be entered in driving means, affect to drive The service life of dynamic device.

The content of the invention

The purpose of this utility model is that a kind of setting height(from bottom) of offer is low, adjustable height is big, outward appearance good and the liter of life-span length Drop column.

In order to achieve the above object, this utility model is adopted the following technical scheme that：A kind of lifting column, including inner tube, in Pipe, outer tube, the first screw mandrel, the second screw mandrel being sheathed in the first screw mandrel and driving means, inner tube is socketed with middle pipe and can be in The axially reciprocating of pipe, middle pipe is socketed and can be connected with inner tube along the axially reciprocating of outer tube, the first screw mandrel with outer tube, the Two screw mandrels are connected with outer tube, wherein, the driving means coordinate with band in inner tube and with the first screw mandrel, the second screw rod transmission Dynamic inner tube, the tube and the outer tube axially reciprocating.

Further, the driving means include the motor being located in inner tube, the transmission tube in inner tube, are sheathed on biography The first screw mandrel in dynamic pipe, the second screw mandrel being sheathed in the first screw mandrel, transmission tube upper end is provided with and is connected with the first screw rod transmission Driving member, transmission tube lower end is provided with the travelling gear being connected with the second screw rod transmission, motor rotate and band nutating gear and Transmission tube is rotated, and transmission tube drives driving member to rotate, and driving member drives the first screw mandrel axially-movable and drives inner tube axially-movable, Axially-movable and band disorder of internal organs pipe axially-movable of the travelling gear along the second screw mandrel.

Further, be provided with gear-box in said inner tube, travelling gear in gear-box, gear-box by travelling gear with Motor connection is integral so that motor can be with travelling gear along the second screw mandrel axially-movable.

Further, the gear-box includes upper box and lower box, middle pipe be respectively arranged at two ends with middle end of upper section lid and it is lower in End plate, lower box is fixedly connected with lower end plates.

Further, the motor is vertically located at transmission tube side, and the outfan of motor is provided with worm screw, worm screw and driving cog Wheel engagement and band nutating gear rotation.

Further, the first bevel gear set and the second bevel gear set, worm screw are additionally provided between the worm screw and travelling gear Coordinate with the transmission of the first bevel gear set, the first bevel gear set is driven cooperation, the second bevel gear set and transmission with the second bevel gear set Gear drive coordinates.

Further, the lifting column is additionally provided with prevents inner tube and/or middle pipe and/or outer tube from lifting excessive spacing open Close, limit switch is electrically connected with motor.

Further, said inner tube includes interior tube body, is covered on the upper inner end plate of interior tube body, and middle pipe includes middle tube body, lid Middle end of upper section lid and lower end plates together in middle tube body two ends, outer tube includes outer tube body, is covered on the upper outer end cap at outer tube body two ends With lower outer end plate, the first screw mandrel is fixedly connected with upper inner end plate, and the second screw mandrel is through lower end plates and fixes with lower outer end plate and connects Connect.

Further, the driving member and the transmission of the first wire rod thread coordinates, and travelling gear and the second wire rod thread are driven Coordinate, the thread rotary orientation between the thread rotary orientation between driving member and the first screw mandrel and travelling gear and the second screw mandrel is contrary.

Further, the lower end of the driving member is provided with boss, and boss is connected with the threaded upper ends of transmission tube, transmission The upper surface of gear is provided with auxiliary section, in auxiliary section insertion transmission tube and is threadedly coupled fixation, driving cog with the lower end of transmission tube The lower surface of wheel is provided with driving section, and the inwall of driving section is provided with screw thread, and driving section is coordinated by screw thread and the second screw rod transmission.

After above-mentioned technical proposal, this utility model has the advantage that：

1st, because existing driving means are typically all disposed within the lower end of lifting column, and after lifting column rises outside meeting Expose, this not only increases the setting height(from bottom) of lifting column, also affect aesthetics and the life-span of lifting column, by inciting somebody to action Driving means are in inner tube so that the stroke of lifting column partially overlaps with the mounting distance of lifting column, reduces lifting The axially mounted size of column, and being set with each other by two screw mandrels, is risen on the drive means when stretching out, the first screw mandrel and Second screw mandrel is reversely separated, increased lifting column can elevated height, and driving means decline shrink when, the second screw mandrel can It is sleeved in the first screw mandrel so that lifting column is collapsible to minimum, reduce further mounting distance, and is easy to lifting column Storage；Meanwhile, driving means are arranged on inner tube there, and when lifting column rises, driving means will not be exposed outside to be come, and is lifted The aesthetics of lifting column；Further, driving means are located at inner tube there, and water, dust and other impurities can be avoided to enter driving means It is interior, good working environment is provided to driving means, so as to improve the service life of driving means, and then it is vertical to improve lifting The service life of post.

2nd, by by the second screw rod bushing in the first screw mandrel, lifting column decline shrink when, the second screw mandrel it is exhausted big Part is linked in the first screw mandrel, and remainder coordinates with travelling gear so that the installation dimension of lifting column further reduces； Meanwhile, by the two ends that driving member and travelling gear are arranged on transmission tube, when lifting column rises, the first screw mandrel is relative to be passed Dynamic pipe axially-movable and when lifting column rises to extreme position, the lower end of the first screw mandrel can be reached at driving member, now lifted The lift of column can reach maximum；Further, said structure is simple, transmission efficiency, and power conduction is reasonable, weares and teares little, using the longevity Life length.

3rd, it is by arranging gear-box in inner tube, travelling gear is integral with motor connection so that motor can be with transmission Gear this further reduces the setting height(from bottom) of lifting column along the second screw mandrel axially-movable, preferably be easy to lifting column Storage；Meanwhile, gear-box is arranged to be made up of upper box and lower box, so travelling gear is closed, prevent water, Dust and other impurities are entered, it is to avoid affected the transmission between travelling gear and motor, improved work efficiency and service life；And under Casing is fixedly connected with the lower end plates of middle pipe, when lifting column is lifted can drive motor rise together, further reduce The setting height(from bottom) of lifting column, is easy to the storage of lifting column.

4th, by the way that motor to be vertically located at transmission tube side, the axially mounted size of lifting column is so not only reduced, Also reduce lifting column is transversely mounted size, improves the aesthetics of lifting column；Meanwhile, by worm screw and travelling gear Engaged transmission, improves the stability of transmission, reduces noise during transmission, and the simple structure, easily realizes, low cost.

5th, by arranging the first bevel gear set and the second bevel gear set between worm screw and travelling gear, worm screw is oblique with first Gear train transmission coordinates, and the first bevel gear set coordinates with the transmission of the second bevel gear set, and the second bevel gear set is driven with travelling gear Coordinate, so not only realize the commutation of worm screw, and motor axial direction is parallel with middle pipe axially-movable direction, reduces gear Case end face area of section, realizes that gear box structure is compact, and gear-box can be put in inner tube, has further overlapped gear-box and interior The height of pipe, further reduces the mounting distance of lifting column, and power when improving transmission, and helical gear can be played Reliable self-locking action, it is ensured that stability during transmission.

6th, by arranging the limit switch for preventing inner tube and/or middle pipe and/or outer tube lifting excessive, limit switch and motor Electrical connection, so when inner tube and/or middle pipe and/or excessive outer tube lifting, limit switch can feed back to motor, prevent inner tube And/or middle pipe and/or outer tube overshoot, and motor carries in itself feedback device, so as to play a duplicate protection to lifting column Effect.

7th, by by the screw thread between the thread rotary orientation and travelling gear and the second screw mandrel between driving member and the first screw mandrel Rotation direction is arranged on the contrary so that driving member drive the first screw mandrel, travelling gear along the second screw mandrel move axially simultaneously when, first Bar and the second screw mandrel is identical or reverse motions so that the speed that lifting column rises or falls is faster；Meanwhile, by driving member Lower end arranges boss, and boss is connected with the threaded upper ends of transmission tube, improves the reliability that transmission tube is fixed with driving member, Reliability and stability when ensureing that transmission tube works with driving member.

Description of the drawings

Below in conjunction with the accompanying drawings the utility model is described in further detail：

Fig. 1 is the decomposing schematic representation of lifting column embodiment one described in the utility model；

Fig. 2 is the sectional view of lifting column embodiment one described in the utility model；

Fig. 3 is the enlarged drawing of A in Fig. 2；

Fig. 4 is the enlarged drawing of B in Fig. 2；

Fig. 5 is the structural representation of travelling gear in lifting column embodiment one described in the utility model；

Fig. 6 is the position scheme of installation of motor in lifting column embodiment one described in the utility model

Each component names are marked in figure as follows：

1st, inner tube；11st, interior tube body；12nd, upper inner end plate；121st, limited post；122nd, positive stop lug boss；2nd, middle pipe；21st, middle pipe Body；22nd, middle end of upper section lid；23rd, lower end plates；3rd, outer tube；31st, outer tube body；32nd, upper outer end cap；33rd, lower outer end plate；331st, it is spacing Step；4th, motor；41st, worm screw；5th, transmission tube；6th, the first screw mandrel；7th, the second screw mandrel；71st, limited impression；8th, driving member；81st, it is convex Platform；9th, travelling gear；91st, auxiliary section；92nd, driving section；10th, gear-box；101st, upper box；102nd, lower box；20th, the first helical teeth Wheel group；30th, the second bevel gear set.

Specific embodiment

Embodiment one：

As shown in Figures 1 to 6, this utility model provides a kind of lifting column, including inner tube 1, middle pipe 2, the screw mandrel of outer tube 3 first 6th, the second screw mandrel 7 and the driving means being sheathed in the first screw mandrel 6, inner tube 1 and middle pipe 2 be socketed and can in the axial direction of pipe 2 it is past Multiple motion, the first screw mandrel 6 is connected with inner tube 1, and the second screw mandrel 7 is connected with outer tube 3, driving means be located at inner tube 1 it is interior and with middle pipe 2 It is fixed, and coordinate to drive inner tube 1, middle pipe 2 and the axially reciprocating of outer tube 3 with the first screw mandrel 6, the transmission of the second screw mandrel 7, so as to Realize the lifting of column.So arrange and be advantageous in that, because existing driving means are typically all disposed within lifting column End, and can expose outside to come after lifting column rises, the setting height(from bottom) of lifting column is this not only increases, also affect lifting The aesthetics of column and life-span, by the way that driving means are fixed in the inner tube and with middle pipe 2 so that the stroke of lifting column with The mounting distance of lifting column partially overlaps, and reduces the axially mounted size of lifting column, and is mutually covered by two screw mandrels Together, when stretching out when rising on the drive means, the first screw mandrel and the second screw mandrel are reversely separated, and increased lifting column can raise Height, and driving means decline shrink when, the second screw mandrel can be sleeved in the first screw mandrel so that lifting column is collapsible to It is minimum, mounting distance is reduce further, and it is easy to the storage of lifting column；Meanwhile, driving means are arranged on inner tube there, when When lifting column rises, driving means will not be exposed outside to be come, and improves the aesthetics of lifting column；Further, driving means are located at Inner tube there, can avoid water, dust and other impurities from entering in driving means, and to driving means good working environment is provided, so as to The service life of driving means is improved, and then improves the service life of lifting column.

As shown in Figure 1, 2, inner tube 1 includes interior tube body 11, the upper inner end plate 12 of interior tube body 11 is covered on, during middle pipe 2 includes Body 21, the middle end of upper section lid 22 for being covered on the two ends of middle tube body 21, lower end plates 23, outer tube 3 includes outer tube body 31, is covered on outer tube The upper outer end cap 32 at the two ends of body 31, lower outer end plate 33, the first screw mandrel 6 is fixedly connected with upper inner end plate 12, and the second screw mandrel 7 is passed through down End plates 23 are simultaneously fixedly connected with lower outer end plate 33, and inner tube 1 is sheathed in middle pipe 2 and can glide on the inwall axial direction of pipe 2 in Dynamic, middle pipe 2 is sheathed in outer tube 3 and can axially slide up and down along the inwall of outer tube 3.

As shown in Fig. 3 to 6, driving means include motor 4, the transmission tube 5 in inner tube 1 in inner tube 1, motor 4 are vertically located at the side of transmission tube 5, so not only reduce the axially mounted size of lifting column, also reduce lifting column Size is transversely mounted, the aesthetics of lifting column is improved；First screw mandrel 6 be it is hollow, the second screw mandrel 7 be it is solid, certainly In order to it is cost-effective can also be for hollow, the second screw mandrel 7 is sheathed in the first screw mandrel 6, and the upper end of transmission tube 5 is provided with and first The driving member 8 that bar 6 is connected, driving member 8 can also can be nut for flange, and the lower end of driving member 8 is provided with boss 81, convex Platform 81 is connected with the threaded upper ends of transmission tube 5, naturally it is also possible to adopt interference fit, the first screw mandrel 6 is through driving member 8 Installing hole simultaneously coordinates with the screw-driven of driving member 8, the thread rotary orientation and the first screw mandrel 6 and transmission between boss 81 and transmission tube 5 Thread rotary orientation between part 8 is reverse, so that transmission tube 5 drives driving member 8 to turn tighter and tighter when rotating, and will not loosen, more Will not fall off, it is ensured that the reliability and stability during work；The lower end of transmission tube 5 is provided with the biography being connected with the second screw mandrel 7 Moving gear 9, travelling gear 9 is provided with installation through-hole, coordinates with the screw-driven of travelling gear 9 in the insertion installation through-hole of the second screw mandrel 7, The upper surface of travelling gear 9 is provided with auxiliary section 91, and the lower end of transmission tube 5 is placed on the outside of auxiliary section 91 and connects with the screw thread of auxiliary section 91 Connect fixation, naturally it is also possible to adopt interference fit, the first screw mandrel 6 to be placed on inside auxiliary section 91, the lower surface of travelling gear 9 is provided with Driving section 92, the inwall of driving section 92 is provided with screw thread, and driving section 92 is coordinated with the second screw mandrel 7 by the screw-driven, 4 turns of motor Dynamic and band nutating gear 9 and transmission tube 5 are rotated, and transmission tube 5 drives driving member 8 to rotate, and driving member 8 drives the axle of the first screw mandrel 6 To moving and drive the axially-movable of inner tube 1, and axially-movable and band disorder of internal organs pipe 2 axially fortune of the travelling gear 9 along the second screw mandrel 7 It is dynamic, to realize the lifting of column.So arrange and be advantageous in that, by the way that in the first screw mandrel, lifting is vertical by the second screw rod bushing When contraction is declined, the overwhelming majority of the second screw mandrel is linked in the first screw mandrel post, and remainder coordinates with travelling gear so that The installation dimension of lifting column further reduces；Meanwhile, by the two ends that driving member and travelling gear are arranged on transmission tube, when When lifting column rises, the first screw mandrel with respect to transmission tube axially-movable and when lifting column rises to extreme position, the first screw mandrel Lower end can be reached at driving member, and now the lift of lifting column can reach maximum；Further, said structure is simple, transmission effect Rate is high, and power conduction is reasonable, little, long service life of wearing and tearing.

The screw-driven of 8 and first screw mandrel of driving member 6 coordinates, and the transmission of the wire rod thread of travelling gear 9 and second coordinates, driving member 8 and first the thread rotary orientation between screw mandrel 6 it is contrary with the thread rotary orientation between the screw mandrel 7 of travelling gear 9 and second so that driving member 8 drive the first screw mandrels 6, travelling gear 9 along the second screw mandrel 7 move axially simultaneously when, the first screw mandrel 6 it is identical with the second screw mandrel 7 or Reverse motions so that the speed of lifting column rising and decline is faster.

Gear-box is provided with inner tube 1, in gear-box, gear-box is connected travelling gear 9 with motor 4 to travelling gear 9 It is integral, so that motor can this further reduces the peace of lifting column with travelling gear 9 along the axially-movable of the second screw mandrel 7 Dress height, is preferably easy to the storage of lifting column；Gear-box includes upper box 101 and lower box 102, and lower box 102 is with End plates 23 are fixedly connected, and are so closed travelling gear 9, prevent water, dust and other impurities from entering, it is to avoid to affect driving cog Transmission between wheel and motor, improves work efficiency and service life；And lower box 102 is consolidated with the lower end plates 23 of middle pipe 2 Fixed connection, when lifting column is lifted can drive motor rise together, the setting height(from bottom) of lifting column is further reduced, just In the storage of lifting column.

The outfan of motor 4 is provided with worm screw 41, and the first bevel gear set 20 and are additionally provided between worm screw 41 and travelling gear 9 Two bevel gear sets 30, the transmission of 41 and first bevel gear set of worm screw 20 coordinates, and the first bevel gear set 20 is passed with the second bevel gear set 30 Dynamic to coordinate, the second bevel gear set 30 coordinates with the transmission of travelling gear 9, has so both improved the stability of transmission, reduces transmission When noise, and power when improving transmission, also helical gear can play reliable self-locking action, it is ensured that stablizing during transmission Property.Certainly, worm screw 41 also directly can rotate with the engaged transmission of travelling gear 9 and with nutating gear 9, so as to realize the liter of column Drop, easily this kind of mode simple structure, realization, low cost, the lifting of same achievable column.So arrange and be advantageous in that, no The commutation of worm screw is only realized, and motor axial direction is parallel with middle pipe axially-movable direction, reduces gearbox end surfaces section Area, realizes that gear box structure is compact, and gear-box can be put in inner tube, has further overlapped the height of gear-box and inner tube, Power when further reducing the mounting distance of lifting column, and improving transmission, and helical gear can play it is reliable from Lock is acted on, it is ensured that stability during transmission.

As shown in Figure 3,4, the upper surface of the second screw mandrel 7 is provided with limited impression 71, and the upper inner end plate 12 of inner tube 1 is provided with and limit The limited post 121 that position groove 71 coordinates, upper inner end plate 12 is additionally provided with for carrying out spacing limit convex to the upper end of the first screw mandrel 6 The mating shapes of stopper slot, the shape of stopper slot and the first screw mandrel 6 are provided with platform 122, positive stop lug boss 122, the first screw mandrel 6 Lower end is carried out in the auxiliary section 91 of lower end insertion travelling gear 9 spacing, by positive stop lug boss 122 and auxiliary section to the first screw mandrel 6 Carry out radially spacing, it is ensured that the first screw mandrel 6 is not rocked, do not swung when working, and the inner surface of outer lower end plate 33 is provided with for right Second screw mandrel 7 carries out being provided with stopper slot, the shape of stopper slot and the second screw mandrel in spacing limited step 331, limited step 331 6 mating shapes, the second screw mandrel 7 carried out by the two ends of 331 pairs of the second screw mandrels 7 of limited post 121 and limited step it is spacing, Do not rock, do not swing when ensureing that the second screw mandrel 7 works.Certainly, the first screw mandrel can be fixed by flange or nut with upper inner end plate Connection, the second screw mandrel also can be fixedly connected by flange or nut with lower outer end plate.

The operation principle of lifting column is as follows：

A kind of situation, outer tube is motionless, and when column rises, motor is rotated forward and oblique by worm screw and the first bevel gear set and second Gear driven travelling gear is rotated, and travelling gear is rotated around the second screw mandrel, and moved axially upward along the second screw mandrel, due to transmission Gear is fixedly connected with the lower end of transmission tube, and then also drives transmission tube to rotate, and the upper end of transmission tube is fixed with driving member, passes Moving part is connected with the first screw rod transmission, and the first screw mandrel is moved axially upward along driving member, and upper the inner of the first screw mandrel and inner tube Plate is fixedly connected, and the first screw mandrel pushes up inner tube, and travelling gear and motor are linked into an integrated entity by gear-box, and is fixed on In the lower end plates of middle pipe, due to outer tube it is immovable so that travelling gear is moved axially upward along the second screw mandrel, in promoting Pipe is moved upwards, when central pipe and inner tube are all stretched out, that is, reaches maximum height；Conversely, motor reversal, lifting column is retracted to Minimum altitude.Another kind of situation, middle pipe is motionless, and the difference with upper kind situation is that the first screw mandrel and the second screw mandrel stretch out to two ends And promote inner and outer tubes respectively, so as to realize stretching out and shrinking for lifting column.

Driving means drive inner tube 1 axially upwardly to move, and middle pipe 2 is also axially upwardly moved with inner tube 1 simultaneously, central pipe 2 When reaching upper extreme position, inner tube 1 also reaches upper extreme position simultaneously or inner tube 1 continues upward the segment distance of axially-movable one and arrives Up to upper extreme position, now column reaches maximum height；When column declines, driving means drive inner tube 1 to move axially downwards, in Pipe 2 is also moved axially downwards with inner tube 1 simultaneously, and when central pipe 2 reaches lower limit position, inner tube 1 also reaches limit inferior position simultaneously Put or inner tube 1 continues to move a segment distance axially downwards and reach lower limit position, now column completes to shrink；So repeatedly, So as to realize the lifting of column.

Embodiment two：

The present embodiment is with the difference of embodiment one, and lifting column is additionally provided with prevents inner tube 1 and/or middle pipe 2 and/or outer Pipe 3 lifts excessive limit switch, and limit switch is electrically connected with motor 4, and it is each that limit switch is provided with the extreme position of two, i.e., two If one, so when inner tube and/or middle pipe and/or excessive outer tube lifting, limit switch can feed back to motor, prevent inner tube And/or middle pipe and/or outer tube overshoot, and motor carries in itself feedback device, so as to play a duplicate protection to lifting column Effect.

Lifting column in above two embodiment can be applicable to Medical operation table, same table, chair lift, tatami etc. its His lowering or hoisting gear.

In addition to above preferred embodiment, this utility model also has other embodiments, and those skilled in the art can be with root It is variously modified according to this utility model and deforms, without departing from spirit of the present utility model, this utility model all should be belonged to Scope defined in claims.

Claims (10)

1. a kind of lifting column, including inner tube, middle pipe, outer tube, the first screw mandrel, the second screw mandrel being sheathed in the first screw mandrel and drive Dynamic device, inner tube be socketed with middle pipe and can in pipe axially reciprocating, middle pipe and outer tube are socketed and can be along the axial directions of outer tube Move back and forth, the first screw mandrel is connected with inner tube, and the second screw mandrel is connected with outer tube, it is characterised in that the driving means are located at interior Coordinate to drive inner tube, the tube and the outer tube axially reciprocating in pipe and with the first screw mandrel, the second screw rod transmission.

2. lifting column according to claim 1, it is characterised in that the driving means include motor in inner tube, Transmission tube in inner tube, transmission tube upper end is provided with the driving member being connected with the first screw rod transmission, transmission tube lower end be provided with The travelling gear of the second screw rod transmission connection, motor is rotated and band nutating gear and transmission tube are rotated, and transmission tube drives transmission Part is rotated, and driving member drives the first screw mandrel axially-movable and drives inner tube axially-movable, and travelling gear is along the axial direction of the second screw mandrel Motion and band disorder of internal organs pipe axially-movable.

3. lifting column according to claim 2, it is characterised in that gear-box is provided with said inner tube, travelling gear is located at In gear-box, travelling gear and motor connection is integral for gear-box so that motor can axially be transported with travelling gear along the second screw mandrel It is dynamic.

4. lifting column according to claim 3, it is characterised in that the gear-box includes upper box and lower box, middle pipe Middle end of upper section lid and lower end plates are respectively arranged at two ends with, lower box is fixedly connected with lower end plates.

5. lifting column according to claim 2, it is characterised in that the motor is vertically located at transmission tube side, motor Outfan is provided with worm screw, and worm screw engages with travelling gear and band nutating gear is rotated.

6. lifting column according to claim 5, it is characterised in that be additionally provided with first between the worm screw and travelling gear oblique Gear train and the second bevel gear set, worm screw coordinates with the transmission of the first bevel gear set, and the first bevel gear set is passed with the second bevel gear set Dynamic to coordinate, the second bevel gear set coordinates with travelling gear transmission.

7. lifting column according to claim 2, it is characterised in that the lifting column be additionally provided with prevent inner tube and/or in Pipe and/or outer tube lift excessive limit switch, and limit switch is electrically connected with motor.

8. lifting column according to claim 1, it is characterised in that said inner tube includes interior tube body, is covered on interior tube body Upper inner end plate, middle pipe includes middle tube body, is covered on the middle end of upper section lid and lower end plates at middle tube body two ends, outer tube include outer tube body, The upper outer end cap and lower outer end plate at outer tube body two ends are covered on, the first screw mandrel is fixedly connected with upper inner end plate, and the second screw mandrel is passed through Lower end plates are simultaneously fixedly connected with lower outer end plate.

9. the lifting column according to any one of claim 2-8, it is characterised in that the driving member and the first wire rod thread are passed Dynamic cooperation, travelling gear and the transmission of the second wire rod thread coordinate, the thread rotary orientation and driving cog between driving member and the first screw mandrel Thread rotary orientation between wheel and the second screw mandrel is contrary.

10. the lifting column according to any one of claim 2-8, it is characterised in that the lower end of the driving member is provided with boss, Boss is connected with the threaded upper ends of transmission tube, and the upper surface of travelling gear is provided with auxiliary section, in auxiliary section insertion transmission tube And fixation is threadedly coupled with the lower end of transmission tube, the lower surface of travelling gear is provided with driving section, and the inwall of driving section is provided with screw thread, Driving section is coordinated by screw thread and the second screw rod transmission.