CN110897335A

CN110897335A - Lifting upright post

Info

Publication number: CN110897335A
Application number: CN201911158817.0A
Authority: CN
Inventors: 王建锋; 应鑫勇; 石兰东; 赵奇晶; 茹钢
Original assignee: Shaoxing Naite Drive Technology Co Ltd
Current assignee: Shaoxing Naite Drive Technology Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-03-24

Abstract

The invention discloses a lifting upright post, relates to the technical field of lifting systems, aims to solve the problem that table legs are not smoothly lifted, and adopts the technical scheme that: the inner tube and the middle tube are sleeved with the middle tube, the middle tube can axially reciprocate along the inner tube, and a sliding mechanism used for reducing friction coefficients is arranged between the inner tube and the middle tube. The invention can realize gapless assembly between the inner pipe and the middle pipe in a novel sleeve sliding connection mode, and has stronger stability, smaller sliding resistance, more reasonable structure and smoother sliding.

Description

Lifting upright post

Technical Field

The invention relates to the technical field of lifting systems, in particular to a lifting upright post.

Background

The desk is widely applied to work, study and life of people, for example, a computer desk, a desk, an office desk and the like bring much convenience to people, along with the application requirements of people, the requirements on comfort, convenience and the like of the desk are higher and higher, especially, the desk capable of adjusting the height is popular with people, and the desk utilizing the lifting stand column to adjust the height is developed to meet the requirements of people.

Chinese patent with publication number CN203467934U discloses a lifting table leg, which has the technical key points that: the table legs are characterized in that the table legs are included, the outer pipe sleeves the inner pipe in the table legs, a plurality of ball bar assemblies are arranged between the outer pipe and the inner pipe, each ball bar assembly is composed of a plastic ball bar and a plastic ball, each plastic ball bar is provided with a plurality of ball holes, the plastic balls are located in the ball holes, and the diameter of each plastic ball is larger than the thickness of the corresponding plastic ball bar.

The problem of current table leg up-and-down motion frictional resistance big, poor stability has been solved in the above-mentioned scheme, but the ball orbit is not set for to the ball when rolling, appears the phenomenon of card pearl easily, therefore causes the not smooth problem of table leg lift.

Therefore, a new solution is needed to solve this problem.

Disclosure of Invention

The present invention is directed to solving the above problems by providing a lifting column.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a lifting column, includes inner tube and well pipe, well pipe cup joints in the inner tube outside and well pipe can be followed the inner tube and made axial reciprocating motion, be equipped with the slide mechanism who is used for reducing coefficient of friction between inner tube and the well pipe.

Through adopting above-mentioned technical scheme, through setting up slide mechanism between inner tube and well pipe, can reduce the coefficient of friction between inner tube and the well pipe for the lift effect of well pipe is laborsaving more smooth and easy, improves the result of use.

The invention is further configured to: the sliding mechanism comprises a sliding seat, and a plurality of rolling pieces are fixedly mounted on the side surface of the sliding seat.

Through adopting above-mentioned technical scheme, utilize the rolling piece to produce relative motion to inner tube and well pipe, have the characteristics that frictional force is little and the clearance is controlled easily for plane friction motion between inner tube and the well pipe is changed into rolling friction, not only greatly reduces frictional resistance, improves the motion performance, and the face just makes the lift effect of this lift stand more steady.

The invention is further configured to: the flexible folding of sliding seat, the sliding seat includes a plurality of end to end connection's slider one, and is adjacent be formed with between the slider one and turn over the hem, the end to end both ends of sliding seat are equipped with recess and connection piece respectively, the connection piece is used for the card to go into in the recess, card hole one has been seted up in the recess, fixedly connected with is used for the card to go into the card post one in card hole one on the connection piece.

Through adopting above-mentioned technical scheme, through setting the sliding seat to flexible beta structure for the sliding seat can be unpack apart and turn over when not using and turn over into plane, convenient stack is deposited, reduces occupation space, and can turn over the book along the lateral wall of inner tube when using, and in turning over a book end and go into the recess with the connection piece card, make card post card on the connection piece go into to the card hole one on the recess in, realize the purpose of sliding seat fixed mounting on the inner tube, simple and practical.

The invention is further configured to: the sliding mechanism further comprises a second sliding block, a second clamping hole is formed in one end, facing the middle pipe, of the inner pipe, and a second clamping column fixedly connected to the second sliding block is used for being clamped into the second clamping hole.

Through adopting above-mentioned technical scheme, through setting up slider two and utilizing the card post two on the slider two to block into the card hole two of inner tube, realize the fixed mounting of slider two, and sliding connection just is the face contact between slider two and the well pipe, can keep perpendicular stable state when well pipe goes up and down, improves the lift stability of this lift stand.

The invention is further configured to: well pipe towards inner tube one side fixedly connected with dust cover, the lateral surface fixedly connected with card strip of dust cover, the inboard of well pipe is offered and is used for the groove strip that card strip card is gone into.

Through adopting above-mentioned technical scheme, through setting up the dust cover, can avoid dust etc. to enter into in the inner tube and well intraductal, improve the smooth and easy nature of sliding of well pipe, utilize card strip card on the dust cover to go into in the groove strip that corresponds position department on well pipe in addition, realize the convenient installation of dust cover.

The invention is further configured to: the middle pipe is connected with an outer pipe through a sliding mechanism in a sliding mode, the outer pipe is sleeved on the outer side of the middle pipe and can axially reciprocate along the middle pipe, a first screw rod and a second screw rod are arranged inside the inner pipe and sleeved on the outer side of the first screw rod, the first screw rod is used for driving the middle pipe and the second screw rod to axially reciprocate, and the second screw rod is used for driving the outer pipe to axially reciprocate.

Through adopting above-mentioned technical scheme, through setting up the outer tube, realize inner tube, well pipe and outer tube syllogic elevation structure to utilize first lead screw and the second lead screw of cover establishing in the first lead screw outside to carry out lift adjustment to this lift stand, can enlarge the stroke of this lift stand, adjusting range promptly improves its use value.

The invention is further configured to: the inner tube is kept away from the end box of well one end fixedly connected with of well pipe, install driving motor in the end box, driving motor's output is connected with first lead screw, the inside of inner tube is equipped with the promotion subassembly one that is used for driving well pipe removal, promote subassembly one including be close to the moving member of end box one side, connect in the moving member inside and with first lead screw threaded connection's screw-nut one and locate on the moving member and be used for connecting the promotion pipe one of well pipe.

Through adopting the above technical scheme, through setting up end box, can play the guard action to driving motor, can increase the area of contact between this lift stand and the ground again, play fine supporting effect, and install the inner tube outside with the inside driving motor of inner tube, make the transverse dimension of inner tube reduce relatively, thereby can reduce the transverse dimension of well pipe and outer tube, and then save material, and set up and promote subassembly one, when driving motor drives first lead screw rotation, linear motion is made along the length direction of first lead screw rod to lead screw nut one, it makes linear motion to drive the moving member, thereby utilize to promote first messenger well pipe and make linear motion, and is simple to use and convenient.

The invention is further configured to: draw-in groove and mounting groove have been seted up to the inside of moving member, the outside of screw-nut one is equipped with the lug that is used for the card to go into the draw-in groove, one side that the end box was kept away from to the moving member is equipped with the connecting piece that is used for driving the second lead screw removal, the connecting piece is the bearing, the connecting piece card is gone into in the mounting groove.

Through adopting the above technical scheme, through setting up mutually supported draw-in groove and lug, make the side of lug and the contact of the side wall face of draw-in groove, and then increase the axial area of contact between screw-nut one and the moving member, make things convenient for screw-nut one can better drive the moving member when removing and remove, and set up the lug cross-section into squarely, can carry on spacingly to screw-nut one, avoid appearing screw-nut one along with first lead screw pivoted condition, because the connecting piece is the cover and establishes on the second lead screw and the joint is in the mounting groove of moving member, make the moving member can drive the second lead screw and make linear motion when making linear motion, make well pipe and outer tube synchronous lift, and the usability is improved.

The invention is further configured to: one side that first the promotion pipe keeps away from end box is connected with the sliding block of slip in well intraductal, the sliding block passes through stopper and well pipe fixed connection, the one end fixedly connected with that first lead screw kept away from end box is used for driving the rotatory piece that rotates of second lead screw, the outside that rotates the piece is equipped with straight-tooth one, the inner wall of second lead screw is equipped with the straight-tooth two that is used for meshing straight-tooth one.

Through adopting above-mentioned technical scheme, through setting up the sliding block, can increase the stability of propelling movement pipe one, it is fixed mutually with well pipe to utilize the stopper in addition, the pipe removes together in the energy band, the practicality is improved, set up intermeshing's straight-tooth one and straight-tooth two simultaneously, rotate promptly and mesh mutually with second lead screw inner wall, when first lead screw rotates, can drive and rotate a rotation, and then make the second lead screw rotatory, thereby guarantee that the second lead screw can carry out rotary motion when making linear motion, and then can improve the lift distance of this lift stand.

The invention is further configured to: the outside threaded connection of second lead screw has the promotion subassembly two that is used for driving the outer tube and removes, promote the subassembly two including with second lead screw threaded connection's screw-nut two and locate screw-nut two on and be used for connecting the outside pipe promote the pipe two, the one end fixedly connected with roof of end box is kept away from to the outer tube, promote pipe two and roof fixed connection, one side that end box was kept away from to the second lead screw is connected with the slip circle of slip in promoting pipe two.

Through adopting above-mentioned technical scheme, through setting up promotion subassembly two, when the second lead screw is rotatory, can drive lead screw nut two and make rectilinear motion on the second lead screw, and then drive and push away pipe two and make rectilinear motion, push away pipe two and drive the roof and go up and down, because the roof is fixed with the outer tube, can drive the outer tube and go up and down, through setting up the sliding ring, can increase the stability of pushing away pipe two, and then improve lead screw nut two's stability.

In conclusion, the invention has the following beneficial effects:

1. through set up slide mechanism between inner tube and well pipe, can reduce the coefficient of friction between inner tube and the well pipe for the lift effect of well pipe is laborsaving more smooth and easy, improves the result of use.

2. Utilize the rolling member to produce relative motion to inner tube and well pipe, have the characteristics that frictional force is little and the clearance is controlled easily for the plane friction motion between inner tube and the well pipe is changed into rolling friction, not only greatly reduces frictional resistance, improves the motion performance, and the face just makes the lift effect of this lift stand more steady.

3. Through setting the sliding seat to flexible beta structure for the sliding seat can be unpack apart and turn over into plane when not using, convenient stack is deposited, reduces occupation space, and can turn over the book along the lateral wall of inner tube when using, and in turning over a book end with the connection piece card income recess, make in card post card on the connection piece goes into the card hole one on the recess, realize the purpose of sliding seat fixed mounting on the inner tube, simple and practical.

4. Through setting up slider two and utilizing the card post two on the slider two to block into the card hole two of inner tube, realize the fixed mounting of slider two, and sliding connection just is the face contact between slider two and the well pipe, can keep perpendicular stable state when well pipe goes up and down, improves the lift stability of this lift stand.

5. Through setting up the dust cover, can avoid dust etc. to enter into in the inner tube and well intraductal, improve the smooth and easy nature of slip of well pipe, utilize card strip card on the dust cover to go into in the groove strip that corresponds position department on well pipe in addition, realize the convenient installation of dust cover.

6. Through setting up the outer tube, realize inner tube, well pipe and outer tube syllogic elevation structure to utilize first lead screw and cover to establish the second lead screw in the first lead screw outside and carry out lift adjustment to this lift stand, can enlarge the stroke of this lift stand, adjusting range promptly improves its use value.

7. Through setting up end box, can play the guard action to driving motor, can increase the area of contact between this lift stand and the ground again, play fine supporting effect, install the inner tube outside with the inside driving motor of inner tube moreover for the transverse dimension of inner tube reduces relatively, thereby can reduce the transverse dimension of well pipe and outer tube, and then save material.

Drawings

FIG. 1 is a schematic structural view of a lifting column according to the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a partial exploded view of the inner tube and the middle tube of a lifting column according to the present invention;

FIG. 4 is an enlarged view of FIG. 3 at B;

FIG. 5 is a schematic structural view of a sliding seat installed in a lifting column according to the present invention;

FIG. 6 is a schematic structural view of a lifting column according to the present invention with a sliding seat disassembled;

FIG. 7 is a perspective view of a lifting column of the present invention;

FIG. 8 is a schematic structural view of a moving member in the lifting column according to the present invention;

FIG. 9 is a schematic structural diagram of a first feed screw nut in the lifting column according to the present invention;

FIG. 10 is a schematic view of a rotating member of the lifting column according to the present invention;

FIG. 11 is a schematic structural view of a second screw of a lifting column according to the present invention;

fig. 12 is a schematic structural view of a fixing sleeve in a lifting column according to the present invention.

Reference numerals: 1. a bottom case; 2. an inner tube; 3. a middle tube; 4. an outer tube; 5. a first lead screw; 6. a second lead screw; 7. a moving member; 8. a first screw rod nut; 9. pushing the first pipe; 10. a card slot; 11. mounting grooves; 12. a bump; 13. a connecting member; 14. a slider; 15. a limiting block; 16. a rotating member; 17. straight teeth I; 18. a second straight tooth; 19. a second screw rod nut; 20. pushing the pipe II; 21. a top plate; 22. a sliding ring; 23. a drive motor; 24. a sliding seat; 241. a first sliding block; 242. connecting sheets; 243. a rolling member; 244. clamping the first column; 245. a first clamping hole; 25. a second sliding block; 26. a dust cover; 27. clamping the strip; 28. groove strips; 29. a second clamping column; 30. a second clamping hole; 31. fixing a sleeve; 32. a clamping block; 33. a bevel; 34. a through groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 12, a lifting column comprises a bottom box 1 with an opening, a driving motor 23 is installed in the bottom box 1, the bottom box 1 can protect the driving motor 23 and increase the contact area between the lifting column and the ground to achieve a good supporting effect, a bearing is installed at the opening of the bottom box 1, an inner tube 2 is fixedly connected to the upper portion of the bottom box 1, a middle tube 3 is slidably connected to the outer side of the inner tube 2 through a sliding mechanism, the middle tube 3 can axially reciprocate along the inner tube 2, an outer tube 4 is slidably connected to the outer side of the middle tube 3 through a sliding mechanism, the outer tube 4 can axially reciprocate along the middle tube 3, the sliding mechanism comprises a sliding seat 24, a plurality of rolling members 243 are fixedly installed on the side of the sliding seat 24, the rolling members 243 are nylon balls or nylon rollers, the sliding seat 24 is made of plastic material, the sliding seat 24 is of a bendable folding structure, the sliding seat 24 comprises a plurality of first sliding blocks 241 connected end to end, the thickness of each first sliding block 241 is smaller than the diameter of each rolling part 243, a flanging edge is formed between every two adjacent first sliding blocks 241, grooves and connecting pieces 242 are respectively arranged at the end and the end of the sliding seat 24, the connecting pieces 242 are used for being clamped into the grooves, first clamping holes 245 are formed in the grooves, first clamping columns 244 used for being clamped into the first clamping holes 245 are fixedly connected to the connecting pieces 242, the sliding mechanism further comprises second sliding blocks 25, clamping holes two 30 are respectively formed in the upper ends of the inner pipe 2 and the middle pipe 3, clamping columns 29 used for being clamped into the clamping holes two 30 are fixedly connected to the second sliding blocks 25, dust covers 26 are fixedly connected to the lower ends of the middle pipe 3 and the outer pipe 4 to seal the interiors of the lifting columns, clamping strips 27 are fixedly connected to the outer side faces of the dust covers 26, groove strips 28 are arranged at the lower ends of the inner sides of the middle pipe 3 and the outer, the inner tube 2 is internally provided with a first screw rod 5 and a second screw rod 6 sleeved outside the first screw rod 5, the first screw rod 5 is used for driving the middle tube 3 and the second screw rod 6 to do axial reciprocating motion, the second screw rod 6 is used for driving the outer tube 4 to do axial reciprocating motion, one end of the first screw rod 5 penetrates through a bearing and is connected with the output end of a driving motor 23, the first screw rod 5 is provided with a first pushing assembly for driving the middle tube 3 to move, the first pushing assembly comprises a moving member 7 close to one side of the bottom box 1, a screw rod nut 8 connected inside the moving member 7 and in threaded connection with the first screw rod 5, and a first pushing tube 9 arranged on the moving member 7 and used for connecting the middle tube 3, the inside of the moving member 7 is provided with a clamping groove 10 and a mounting groove 11, the outside of the screw rod nut 8 is provided with a convex block 12 for clamping into the clamping groove 10, the connecting piece 13 is a bearing, the connecting piece 13 is limited by a clamp spring, one side of the first push pipe 9 far away from the bottom box 1 is connected with a sliding block 14 sliding in the middle pipe 3, the sliding block 14 is fixedly connected with the middle pipe 3 through a limiting block 15, one end of the first lead screw 5 far away from the bottom box 1 is fixedly connected with a rotating piece 16 used for driving the second lead screw 6 to rotate, the outer side of the rotating piece 16 is provided with a first straight tooth 17, the inner wall of the second lead screw 6 is provided with a second straight tooth 18, the first straight tooth 17 is meshed with the second straight tooth 18, the outer side of the second lead screw 6 is in threaded connection with a second push assembly used for driving the outer pipe 4 to move, the second push assembly comprises a second lead screw nut 19 in threaded connection with the second lead screw 6 and a second push pipe 20 arranged on the second lead screw nut 19 and used for connecting the outer pipe 4, one end of the outer pipe 4 far away from, one side of the second screw rod 6, which is far away from the bottom box 1, is connected with a sliding ring 22 which slides in the second pushing pipe 20, and the sliding ring 22 is limited through a clamping spring; the two opposite surfaces of the top of the first push tube 9 are respectively provided with a limiting through hole, the inner side of the top end of the first push tube 9 is provided with a fixing sleeve 31 sleeved on the outer side of the second push tube 20, the two opposite surfaces of the fixing sleeve 31 are uniformly and integrally formed with a clamping block 32 clamped in the limiting through hole, the lower part of the clamping block 32 is provided with an inclined surface 33, the side surface of the fixing sleeve 31 positioned on the two sides of the clamping block 32 is provided with a through groove 34, the fixing sleeve 31 is firstly sleeved on the outer side of the second push tube 20 and moves to the top end of the first push tube 9 for clamping because the fixing sleeve 31 is made of plastic materials and has certain bending performance, when being installed, the position of the clamping block 32 of the fixing sleeve 31 corresponds to the position of the limiting through hole of the first push tube 9, the fixing sleeve 31 is firstly sleeved on the outer side of the, until the clamping block 32 is clamped into the limiting through hole, the fixed mounting of the fixed sleeve 31 is realized, and the fixed sleeve 31 can avoid the shaking condition possibly existing when the second push tube 20 ascends or descends, so that the auxiliary fixing function is realized.

When the lifting upright column ascends, the bottom box 1 and the driving motor 23 are arranged at the bottom end of the inner tube 2, namely the driving motor 23 is arranged at the outer side of the inner tube 2, so that the transverse size of the inner tube 2 is relatively reduced, the transverse size of the middle tube 3 and the outer tube 4 is reduced, materials can be saved, the driving motor 23 is started firstly to rotate forwards, the forward rotation and the reverse rotation of the driving motor 23 belong to the prior art, the driving motor 23 rotates and drives the first lead screw 5 to rotate, so that the first lead screw nut 8 linearly moves along the length direction of the first lead screw 5, the convex block 12 on the first lead screw nut 8 is clamped into the clamping groove 10 of the moving piece 7, the side surface of the convex block 12 is contacted with the side wall surface of the clamping groove 10, the axial contact area between the first lead screw nut 8 and the moving piece 7 is increased, and the first lead screw nut 8 can drive the moving piece 7, the section of the convex block 12 is square, so that the first lead screw nut 8 can be limited, the condition that the first lead screw nut 8 rotates along with the first lead screw 5 is avoided, because the connecting piece 13 is sleeved on the second lead screw 6 and clamped in the mounting groove 11 of the moving piece 7, the moving piece 7 can drive the second lead screw 6 to ascend when ascending, because the rotating piece 16 is fixedly connected at one end of the first lead screw 5, which is far away from the bottom box 1, and the straight tooth first 17 of the rotating piece 16 keeps a meshing state with the straight tooth second 18 of the second lead screw 6 when the second lead screw 6 ascends, the rotating piece 16 synchronously rotates along with the first lead screw 5 when the middle pipe 3 and the moving piece 7 ascend, the second lead screw 6 is driven to rotate, the lead screw nut second 19 is driven to ascend when the second lead screw 6 rotates, the second push pipe 20 is driven to ascend, and the second push pipe 20 pushes the top plate 21 to ascend, the top plate 21 drives the outer tube 4 to ascend, and in conclusion, the forward synchronous rotation of the first screw rod 5 and the second screw rod 6 and the ascending of the second screw rod 6 can be realized by using the driving motor 23, so that the ascending height is adjusted; similarly, when the lifting column descends, the driving motor 23 is reversely rotated to realize the reverse synchronous rotation of the first lead screw 5 and the second lead screw 6 and the descending of the second lead screw 6, and further the descending distance is adjusted, thereby the ascending and descending distance of the lifting column can be greatly improved, and the sliding mechanisms are arranged between the inner tube 2 and the middle tube 3 and between the middle tube 3 and the outer tube 4, so that the friction coefficients between the inner tube 2 and the middle tube 3 and between the middle tube 3 and the outer tube 4 can be reduced, the ascending and descending effects of the middle tube 3 and the outer tube 4 are more labor-saving and smooth, the using effect is improved, because the sliding mechanism comprises the sliding seat 24 and the sliding block two 25, the sliding seat 24 is arranged into a bendable folding structure, and the folding sleeve is sleeved outside the inner tube 2 and the middle tube 3, the gapless assembly between the inner tube 2 and the middle tube 3 and between the middle tube 3 and the outer tube 4 can be, the resistance of a contact surface during sliding is greatly reduced, scratches on a coating sprayed on the surface of a sleeve during sliding are reduced, a second sliding block 25 is arranged on four outer sides of an inner pipe 2 and a middle pipe 3 to play a role in strengthening and stabilizing, a sliding seat 24 can be disassembled and folded into a plane shape when not in use, the overlapping storage is convenient, the occupied space is reduced, the sliding seat can be folded along the side walls of the inner pipe 2 and the middle pipe 3 during use, the sliding seat 24 on the inner pipe 2 and the sliding seat 24 on the middle pipe 3 are only different in size, and a connecting piece 242 is clamped into a groove after the folding is finished, so that a first clamping column 244 on the connecting piece 242 is clamped into a first clamping hole 245 on the groove, the purpose that the sliding seat 24 is folded and sleeved outside the inner pipe 2 is achieved, a nylon ball is embedded and fixed on a first sliding block 241 of the sliding seat 24, the sliding seat is not easy to fall off during installation, the rolling members 243 are utilized to generate relative motion to the inner pipe 2, the middle pipe 3 and the outer pipe 4, and the rolling members have the characteristics of small friction force and easy control of gaps, so that the plane friction motion between the inner pipe 2 and the middle pipe 3 and between the middle pipe 3 and the outer pipe 4 is converted into rolling friction, the friction resistance is greatly reduced, the motion performance is improved, the lifting effect of the lifting upright post is more stable, meanwhile, the sliding connection and surface contact between the second sliding blocks 25 and the middle pipe 3 and the outer pipe 4 can keep a vertical and stable state when the middle pipe 3 and the outer pipe 4 are lifted, the lifting stability of the lifting upright post is improved, the dust covers 26 are arranged at the lower ends of the middle pipe 3 and the outer pipe 4, dust and the like can be prevented from entering the lifting upright post, the sliding smoothness of the middle pipe 3 and the outer pipe 4 is improved, and the clamping strips 27 on the dust covers 26 are clamped into the groove strips 28 at the corresponding positions, the convenient installation of the dust cover 26 is achieved, thereby greatly improving the use value of the lifting column.

In conclusion, the invention adopts a novel sleeve sliding connection mode, can realize gapless assembly between the inner pipe and the middle pipe, has stronger stability, smaller sliding resistance, more reasonable structure and smoother sliding.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a lifting column, includes inner tube (2) and well pipe (3), well pipe (3) cup joint in inner tube (2) outside and well pipe (3) can be followed inner tube (2) and make axial reciprocating motion, its characterized in that: and a sliding mechanism for reducing the friction coefficient is arranged between the inner pipe (2) and the middle pipe (3).

2. A lifting column as claimed in claim 1, wherein: the sliding mechanism comprises a sliding seat (24), and a plurality of rolling pieces (243) are fixedly mounted on the side surface of the sliding seat (24).

3. A lifting column as claimed in claim 2, wherein: slide holder (24) flexible is folding, slide holder (24) include a plurality of end to end connection's slider (241), and are adjacent be formed with the hem between slider (241), the end to end both ends of slide holder (24) are equipped with recess and connection piece (242) respectively, connection piece (242) are used for going into in the recess, card hole (245) have been seted up in the recess, fixedly connected with is used for going into card post (244) of card hole (245) on connection piece (242).

4. A lifting column as claimed in claim 2, wherein: the sliding mechanism further comprises a second sliding block (25), a second clamping hole (30) is formed in one end, facing the middle pipe (3), of the inner pipe (2), and a second clamping column (29) used for being clamped into the second clamping hole (30) is fixedly connected to the second sliding block (25).

5. A lifting column as claimed in claim 1, wherein: well pipe (3) are towards inner tube (2) one side fixedly connected with dust cover (26), the lateral surface fixedly connected with card strip (27) of dust cover (26), the groove strip (28) that are used for card strip (27) card to go into are offered to the inboard of well pipe (3).

6. A lifting column as claimed in claim 3 or 4, characterized in that: well pipe (3) have outer tube (4) through slide mechanism sliding connection, outer tube (4) cup joint in well pipe (3) outside and outer tube (4) can be followed well pipe (3) and make axial reciprocating motion, the inside of inner tube (2) is equipped with first lead screw (5) and overlaps second lead screw (6) of establishing in the first lead screw (5) outside, axial reciprocating motion is made in first lead screw (5) and second lead screw (6) in being used for driving well pipe (3) and second lead screw (6), axial reciprocating motion is made in second lead screw (6) are used for driving outer tube (4).

7. A lifting column as claimed in claim 6, wherein: the utility model discloses a well pipe (3) is kept away from in inner tube (2), box (1) at the bottom of one end fixedly connected with of well pipe (3), install driving motor (23) in the end box (1), the output of driving motor (23) is connected with first lead screw (5), the inside of inner tube (2) is equipped with the promotion subassembly one that is used for driving well pipe (3) and removes, promote the subassembly one including being close to moving member (7) of end box (1) one side, connecting in moving member (7) inside and with first lead screw (5) threaded connection's screw-nut (8) and locate on moving member (7) and be used for connecting the promotion pipe (9) of well pipe (3).

8. A lifting column as claimed in claim 7, wherein: draw-in groove (10) and mounting groove (11) have been seted up to the inside of moving member (7), the outside of screw-nut (8) is equipped with and is used for the card to go into lug (12) of draw-in groove (10), one side that end box (1) was kept away from in moving member (7) is equipped with and is used for driving connecting piece (13) that second lead screw (6) removed, connecting piece (13) are the bearing, connecting piece (13) card is gone into in mounting groove (11).

9. A lifting column as claimed in claim 8, wherein: one side that end box (1) was kept away from in promotion pipe (9) is connected with sliding block (14) of slip in well pipe (3), sliding block (14) are through stopper (15) and well pipe (3) fixed connection, the one end fixedly connected with that end box (1) was kept away from in first lead screw (5) is used for driving the rotatory piece (16) that rotates of second lead screw (6), the outside that rotates piece (16) is equipped with straight-tooth one (17), the inner wall of second lead screw (6) is equipped with straight-tooth two (18) that are used for meshing straight-tooth one (17).

10. A lifting column as claimed in claim 9, wherein: the outside threaded connection of second lead screw (6) has the promotion subassembly two that is used for driving outer tube (4) and removes, promote the subassembly two including screw-nut two (19) with second lead screw (6) threaded connection and locate on screw-nut two (19) and be used for connecting the promotion pipe two (20) of outer tube (4), the one end fixedly connected with roof (21) of end box (1) are kept away from in outer tube (4), promote pipe two (20) and roof (21) fixed connection, one side that end box (1) were kept away from in second lead screw (6) is connected with slip ring (22) of slip in promotion pipe two (20).