CN113357509A

CN113357509A - Lifting upright post device

Info

Publication number: CN113357509A
Application number: CN202110648978.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Zhuizhu Technology Co ltd
Current assignee: Shanghai Zhuizhu Technology Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-09-07

Abstract

The invention discloses a lifting upright post device which comprises an outer barrel, an inner barrel, a drag chain and a position feedback device, wherein a first accommodating cavity is arranged in the outer barrel, an opening is formed in one end of the outer barrel in the axial direction and is communicated with the first accommodating cavity, the inner barrel and the drag chain are respectively positioned in the first accommodating cavity, the inner barrel and the outer barrel are in the same axial direction, the inner barrel can be driven to move in the outer barrel in the axial direction of the outer barrel, one end of the drag chain is connected with the outer barrel, the other end of the drag chain is connected with the inner barrel, and the position feedback device is configured to feed back the position of the inner barrel in the outer barrel. The lifting stand column device has the advantages that the lifting stand column device is stable in work, large in number of lines can be arranged inside the lifting stand column device, high in lifting speed and adjustable in speed, high in unbalance loading capacity, capable of accurately positioning the lifting position, and capable of effectively eliminating transmission gaps generated when the trapezoidal screw rod rotates forwards and backwards through the addition of the spring clearance eliminating device.

Description

Lifting upright post device

Technical Field

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

Background

The lifting upright column is a common component in medical equipment, for example, in an operation, a doctor needs to adjust the height of an operating table according to the height of the doctor and the condition of a patient so as to facilitate the operation and the like. The traditional lifting upright column mostly adopts a motor built-in scheme, internal wiring is mostly a spiral line and is limited by the internal space of the device, the number of internal cables is small, and the use scenes needing a large number of internal wiring cannot be met; the lifting speed is slow and is not adjustable, and the lifting speed is mostly constant; the eccentric load bearing moment is small; position feedback is inaccurate, most of the devices do not have position feedback, or a rear encoder of the motor records the position; some lifting columns adopt trapezoidal screw rods, and gaps exist when the trapezoidal screw rods and nuts rotate in the forward and reverse directions.

Therefore, in combination with the above-mentioned technical problems, a new technical solution is needed.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides a lifting upright post device which is stable in work, high in internal wiring quantity, high in lifting speed, adjustable in speed, high in unbalance loading capacity and capable of accurately positioning a lifting position. The specific technical scheme is as follows:

the utility model provides a lifting column device, its includes urceolus, inner tube, tow chain and position feedback device, be provided with first holding chamber in the urceolus, the one end of urceolus axis direction has the opening, the opening with first holding chamber intercommunication, the inner tube with the tow chain is located respectively first holding intracavity, the inner tube with the urceolus axial is the same, the inner tube can be driven follow in the urceolus the axis direction of urceolus removes, the one end of tow chain with the urceolus is connected, the other end of tow chain with the inner tube is connected, the feedback that position feedback device was configured the inner tube is in position in the urceolus.

Furthermore, the outer cylinder comprises an outer cylinder wall and a base plate, the outer cylinder wall is tubular, one end of the outer cylinder wall in the length direction is fixedly connected with the base plate, the outer cylinder wall and the base plate form the first accommodating cavity, and a plurality of friction plates are arranged between the outer cylinder wall and the inner cylinder.

Furthermore, the friction plates comprise a plurality of first friction plates and a plurality of second friction plates, the first friction plates are fixedly installed on the outer cylinder wall, the first friction plates are arranged close to the opening of the outer cylinder wall, the second friction plates are fixedly installed on the side wall of the inner cylinder, and the second friction plates are arranged close to one end, facing the bottom plate, of the inner cylinder.

Furthermore, the plurality of first friction plates are one group or a plurality of groups, the plurality of groups of first friction plates are distributed along the axial direction of the outer cylinder wall, the plurality of groups of second friction plates are one group or a plurality of groups of second friction plates, and the plurality of groups of second friction plates are distributed along the axial direction of the inner cylinder; the friction plates further comprise a plurality of third friction plates, the third friction plates are fixedly arranged on the side wall of the inner barrel, and the third friction plates are located between the first friction plates and the second friction plates.

Further, the inner cylinder comprises an inner cylinder wall and a top plate, the inner cylinder wall is tubular, one end of the inner cylinder wall, far away from the bottom plate, in the length direction is fixedly connected with the top plate, the inner cylinder wall and the top plate form a second accommodating cavity, the inner cylinder wall and the outer cylinder wall are coaxially arranged, the outer cylinder further comprises a guide pipe, the guide pipe is located in the first accommodating cavity, the guide pipe and the outer cylinder wall are axially the same, one end of the guide pipe is fixedly connected with the bottom plate, the other end of the guide pipe is provided with a guide sleeve, the inner cylinder wall is sleeved on the guide pipe, one end of the drag chain is fixedly connected with the guide pipe, the inner cylinder further comprises a stroke pipe, the stroke pipe is located in an inner cavity of the guide pipe, and one end of the stroke pipe, far away from the bottom plate, penetrates through the guide sleeve and is fixedly connected with the top plate, the stroke pipe can be driven to move in the guide pipe along the axis direction of the guide pipe, and then the inner cylinder is driven to move in the first accommodating cavity along the axis direction of the outer cylinder.

The guide pipe is arranged in the first accommodating cavity, the guide pipe is axially arranged on the guide pipe, one end of the guide pipe is rotatably connected with the bottom plate, the nut is sleeved on the guide pipe and is connected with one end, facing the bottom plate, of the stroke pipe, the drive device drives the guide pipe to rotate, the nut is driven to move in the guide pipe along the length direction of the guide pipe, and then the stroke pipe and the inner cylinder are driven to move in the first accommodating cavity along the axial direction of the outer cylinder.

Furthermore, the screw rod is a trapezoidal screw rod, the nut is in threaded connection with the stroke pipe, a spring clearance eliminating device is arranged on one side of the nut, which faces the bottom plate, a plurality of guide grooves are formed in the inner wall of the guide pipe, the length direction of each guide groove is consistent with the axial direction of the guide pipe, a protruding structure is arranged at the position of the nut, which corresponds to the guide grooves, and when the nut is positioned in the guide pipe, the protruding structure is positioned in the corresponding guide groove; or the inner wall of the guide pipe is provided with a plurality of guide bulges, the length direction of the guide bulges is consistent with the axis direction of the guide pipe, the nut is provided with a groove structure corresponding to the position of the guide bulges, and when the nut is positioned in the guide pipe, the guide bulges are positioned in the corresponding groove structures.

Further, it includes the fixing base, the stand pipe pass through the fixing base with bottom plate fixed connection, the lead screw has the link, the link pass through the fixing base with bottom plate rotatable coupling.

Further, be provided with third holding chamber in the fixing base, the axis direction in third holding chamber with the axis direction of urceolus is the same, third holding chamber runs through respectively the both ends of fixing base axis direction, the bottom plate corresponds the through-hole has been seted up to the position in third holding chamber, the one end of stand pipe is located the third holding intracavity, the stand pipe with the inner wall of third holding passes through spacing fastener joint, the link of lead screw passes the through-hole, the link of lead screw with establish through a plurality of bearing rotatable coupling, a plurality of between the fixing base the bearing is through connecting spacer sleeve and establishing the link of lead screw, connect the spacer sleeve with through preventing the commentaries on classics key joint between the lead screw.

Furthermore, a belt pulley is sleeved at the connecting end of the lead screw, the belt pulley is positioned on one side of the bottom plate, which is far away from the outer cylinder wall, the belt pulley and the driving device are driven by a transmission belt, the bearing is a double-row angular contact ball bearing and/or a deep groove ball bearing, the position feedback device comprises a position collector and a pull wire box, the pull wire box is fixed on the bottom plate, a plurality of transition wheels are arranged on the bottom plate, pull wires of the pull wire box sequentially penetrate through the plurality of transition wheels to be connected with the inner cylinder, and the position collector collects the rotation angle of a pull wire rotating shaft in the pull wire box; the lifting upright post device further comprises a first limit switch and a second limit switch, the first limit switch is used for limiting the lowest position of the inner cylinder, which descends, and the second limit switch is used for limiting the highest position of the inner cylinder, which ascends.

Compared with the prior art, the lifting stand column device at least has one or more of the following beneficial effects:

(1) the lifting upright post device has the advantages that the inner part of the lifting upright post device adopts a drag chain wiring mode, more cables can be wired, the lifting upright post device is suitable for use scenes needing more internal wiring, and compared with the lifting upright posts on the current market, the lifting upright post device has the advantages that the number of the cables can be wired in the lifting upright post device is more and more stable within the same cross section size;

(2) according to the lifting upright post device, the lead screw is a trapezoidal lead screw, and the device can realize self-locking under the action of external force on the stroke pipe;

(3) according to the lifting upright post device, the bearing is provided with the double-row angular contact ball bearing, so that the lifting upright post device can bear larger axial force and radial force;

(4) the lifting upright post device has large unbalance loading capacity;

(5) according to the lifting upright post device, the lifting speed of the inner barrel is high, and the speed can be adjusted;

(6) the lifting upright post device is provided with the spring clearance eliminating device, so that the transmission clearance generated when the trapezoidal screw rod rotates forwards and backwards can be reduced or eliminated to a certain extent;

(7) according to the lifting upright post device, the inner cylinder and the outer cylinder are connected through the friction plates, the thickness and the size of the friction plates are controlled, small clearance fit is met, meanwhile, a plurality of groups of friction plates are respectively arranged on the inner wall of the inner cylinder and the peripheral outer wall of the outer cylinder, the contact area can be increased, the stability and the bending moment resistance are improved, and meanwhile, when the inner cylinder is lifted to the highest position, the friction plates can be used as mechanical limit while the contact area is increased;

(8) the application discloses lift stand device, it is provided with position feedback device, can feed back the lift position of inner tube.

Drawings

Fig. 1 is a schematic perspective view of a lifting column device provided in an embodiment of the present application;

fig. 2 is a schematic perspective view of the lifting column device provided in the embodiment of the present application at another angle;

FIG. 3 is a schematic top view of the lifting column assembly of FIG. 1;

FIG. 4 is a schematic cross-sectional view of FIG. 3 at A;

FIG. 5 is a partial structural schematic view of an outer barrel provided in an embodiment of the present application;

fig. 6 is a schematic structural view of the lifting column device according to the embodiment of the present disclosure when the outer cylinder wall is removed;

FIG. 7 is a schematic view of the lifting column assembly of FIG. 6 at an angle for further removal of the inner cylindrical wall;

FIG. 8 is a schematic view of the lifting column assembly of FIG. 6 at another angle with the inner tubular wall further removed;

FIG. 9 is a schematic view of the lifting column assembly of FIG. 7 with the guide tube removed;

FIG. 10 is a schematic view of the lifting column assembly of FIG. 9 with the travel tube removed;

FIG. 11 is a schematic structural diagram of a guide tube provided in an embodiment of the present application;

FIG. 12 is an exploded view of a nut and spring anti-backlash device according to an embodiment of the present disclosure;

fig. 13 is an exploded view of the screw rod, the connecting spacer and the anti-rotation key according to the embodiment of the present disclosure.

Wherein, 1-outer cylinder, 11-outer cylinder wall, 12-bottom plate, 121-notch, 122-through hole, 13-first friction plate, 14-guide pipe, 141-guide groove, 142-wire groove structure, 143-second limit switch, 15-guide sleeve, 151-first limit baffle, 16-fixed seat, 161-metal block, 17-limit clamping piece, 18-connecting spacer, 181-first pipe, 182-second pipe, 183-third pipe, 184-deep groove ball bearing, 185-double-row angular contact ball bearing, 186-anti-rotation key, 19-belt wheel, 2-inner cylinder, 21-inner cylinder wall, 211-second limit baffle, 212-connecting piece, 22-top plate, 221-wire hole, 23-second friction plate, 24-a third friction plate, 25-a stroke pipe, 3-a drag chain, 31-a mounting block, 311-a first limit switch, 4-a position feedback device, 41-a position collector, 42-a pull box, 421-a pull wire, 422-a transition wheel, 5-a screw rod, 6-a nut, 61-a bump structure, 7-a driving device, 8-a spring gap eliminating device, 81-a spring, 82-an end pressing sheet and 9-a transmission belt.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be given with reference to the accompanying drawings and preferred embodiments.

Examples

Referring to fig. 1 to 13, fig. 1 is a schematic perspective view of a lifting column device provided in an embodiment of the present application; fig. 2 is a schematic perspective view of the lifting column device provided in the embodiment of the present application at another angle; FIG. 3 is a schematic top view of the lifting column assembly of FIG. 1; FIG. 4 is a schematic cross-sectional view of FIG. 3 at A; FIG. 5 is a partial structural schematic view of an outer barrel provided in an embodiment of the present application; fig. 6 is a schematic structural view of the lifting column device according to the embodiment of the present disclosure when the outer cylinder wall is removed; FIG. 7 is a schematic view of the lifting column assembly of FIG. 6 at an angle for further removal of the inner cylindrical wall; FIG. 8 is a schematic view of the lifting column assembly of FIG. 6 at another angle with the inner tubular wall further removed; FIG. 9 is a schematic view of the lifting column assembly of FIG. 7 with the guide tube removed; FIG. 10 is a schematic view of the lifting column assembly of FIG. 9 with the travel tube removed; FIG. 11 is a schematic structural diagram of a guide tube provided in an embodiment of the present application; FIG. 12 is an exploded view of a nut and spring anti-backlash device according to an embodiment of the present disclosure; fig. 13 is an exploded view of the screw rod, the connecting spacer and the anti-rotation key according to the embodiment of the present disclosure.

The present embodiment provides a lifting column device, which includes an outer cylinder 1, an inner cylinder 2, a drag chain 3 and a position feedback device 4, as shown in fig. 1 to 4 and 7.

The outer cylinder 1 comprises an outer cylinder wall 11 and a bottom plate 12, the outer cylinder wall 11 is tubular, and one end of the outer cylinder wall 11 in the length direction is fixedly connected with the bottom plate 12, as shown in fig. 5. The outer cylinder wall 11 is preferably a square tubular aluminum profile, and the outer cylinder wall 11 and the bottom plate 12 form a first accommodating cavity. An opening is formed in one end of the outer cylinder 1 in the axial direction, the opening is communicated with the first accommodating cavity, namely, the end, far away from the bottom plate 12, of the outer cylinder wall 11 is an open end, the inner cylinder 2 is installed in the first accommodating cavity through the opening, the inner cylinder 2 is axially identical to the outer cylinder 1, and the inner cylinder 2 can be driven to move in the outer cylinder 1 along the axial direction of the outer cylinder 1.

As shown in fig. 6, the inner cylinder 2 includes an inner cylinder wall 21 and a top plate 22, and the inner cylinder wall 21 is tubular. The inner cylindrical wall 21 is preferably a square tubular aluminum profile. One end of the inner cylinder wall 21, which is far away from the bottom plate 12 in the length direction, is fixedly connected with the top plate 22, and the inner cylinder wall 21 and the top plate 22 form a second accommodating cavity.

A plurality of friction plates are arranged between the outer cylinder wall 11 and the inner cylinder wall 21. As shown in fig. 5 and 6, a plurality of friction plates are disposed on both the inner wall of the outer cylinder wall 11 and the outer wall of the inner cylinder wall 21. Now, the friction plate disposed on the inner wall of the outer cylinder wall 11 is defined as a first friction plate 13, and the friction plate disposed on the outer wall of the inner cylinder wall 21 is defined as a second friction plate 23. The first friction plate 13 is arranged close to the opening of the outer cylinder wall 11, and the second friction plate 23 is arranged close to one end of the inner cylinder 2 facing the bottom plate 12, so that the friction plates are always arranged between the inner cylinder wall 21 and the outer cylinder wall 11 when the inner cylinder 2 is lifted in the outer cylinder 1. The thickness of the friction plate is controlled to meet the requirement of small clearance fit. The first friction plates 13 are one or more groups. Preferably, the first friction plates 13 are provided in multiple groups, and the multiple groups of first friction plates 13 are distributed along the axial direction of the outer cylinder wall 11. Fig. 5 shows two sets, each set including eight first friction plates 13, and two of the first friction plates are respectively disposed on four inner walls of the outer cylindrical wall 11. The plurality of second friction plates 23 are one or more groups, and the plurality of groups of second friction plates 23 are distributed along the axial direction of the inner cylinder 2. Fig. 6 shows two sets, each set comprising eight second friction plates 23, and two of the two sets being arranged on four outer walls of the inner cylinder wall 21. The multi-group design can increase the contact area and improve the stability and the bending moment resistance. Of course, it should be understood that the shape, size, number, etc. of the first friction plate 13 and the second friction plate 23 can be designed according to the needs, and are not limited in this application.

In a further embodiment, a plurality of third friction plates 24 are further disposed on the outer wall of the inner cylindrical wall 21, and the third friction plates 24 are located between the first friction plates 13 and the second friction plates 23. As shown in fig. 6, two third friction plates 24 are disposed on an outer wall of the inner cylindrical wall 21, and in specific implementation, the shape, size, number, and installation position of the third friction plates 24 may be designed as required, which is not limited in this application. When the inner cylinder 2 rises, the third friction plate 24 rises along with the inner cylinder 2 until the inner cylinder 2 rises to the highest position, the third friction plate 24 is abutted against the first friction plate 13, and the third friction plate 24 can play a role in mechanical limiting while increasing contact surfaces.

The outer cylinder 1 further comprises a guide tube 14, the guide tube 14 is located in the first accommodating cavity, the guide tube 14 is axially the same as the outer cylinder wall 11, one end of the guide tube 14 is fixedly connected with the bottom plate 12, and the other end of the guide tube 14 is provided with a guide sleeve 15, as shown in fig. 7 and 8. When the inner cylinder 2 is installed in the first accommodating cavity, the inner cylinder wall 21 is sleeved on the guide pipe 14. The drag chain 3 is positioned in the first accommodating cavity. One end of the drag chain 3 is fixedly connected with the guide pipe 14, preferably, a wire casing structure 142 is arranged on one side of the guide pipe 14, and the length direction of the wire casing structure 142 is aligned with the axial direction of the guide pipe 14. One end of the drag chain 3 is fixedly connected with the wire casing structure 142. A notch 121 can be formed in the bottom plate 12 at a position corresponding to the slot structure 142, and can be used as a cable inlet, so that an external cable can conveniently pass through the outer cylinder wall 11 to enter the slot structure 142, and then enter the tow chain 3. Or as a cable outlet, to facilitate the cable in the slot structure 142 to pass through the outer cylinder wall 11 and extend out of the device. In order to ensure the lifting height of the inner cylinder 2, one end of the drag chain 3 is arranged as close as possible to the upper end of the wire casing structure 142. The other end of the drag chain 3 is connected with the inner cylinder 2. Preferably, the other end of the drag chain 3 is fixedly connected with the bottom of the top plate 22 through a mounting block 31, as shown in fig. 7. The inner cylinder 2 moves up and down to drive the drag chain 3 to move up and down, and all cables are wired through the drag chain 3. Correspondingly, a wire hole 221 is formed in the top plate 22 to serve as a cable inlet and outlet.

The inner cylinder 2 further comprises a stroke pipe 25, the stroke pipe 25 is located in the inner cavity of the guide pipe 14, and one end of the stroke pipe 25, which is far away from the bottom plate 12, passes through the guide sleeve 15 and is fixedly connected with the top plate 22, as shown in fig. 7 to 9. The stroke pipe 25 can be driven to move in the guide pipe 14 along the axial direction of the guide pipe 14, and further drives the inner cylinder 2 to move in the first accommodating cavity along the axial direction of the outer cylinder 1.

In a further embodiment, the lifting column device further comprises a screw 5, a nut 6 and a driving device 7. As shown in fig. 10, the screw rod 5 is located in the inner cavity of the guide tube 14, the screw rod 5 is axially identical to the guide tube 14, and one end of the screw rod 5 is rotatably connected to the bottom plate 12. The nut 6 is sleeved on the screw rod 5, the nut 6 is connected with one end, facing the bottom plate 12, of the stroke pipe 25, preferably, the screw rod 5 is a trapezoidal screw rod, and the nut 6 is in threaded connection with the stroke pipe 25. In specific implementation, the trapezoidal screw rod can realize self-locking due to the action of external force on the stroke pipe 25. The inner wall of the guide tube 14 is provided with a plurality of guide grooves 141, and the length direction of the guide grooves 141 is consistent with the axial direction of the guide tube 14, as shown in fig. 11. The nut 6 is provided with a convex structure 61 at a position corresponding to the guide groove 141, as shown in fig. 12. When the nut 6 is located in the guide tube 14, the protrusion 61 is located in the corresponding guide groove 141. The driving device 7 drives the screw rod 5 to rotate, so as to drive the nut 6 to move in the guide tube 14 along the length direction of the guide tube 14, that is, the convex structure 61 of the nut 6 slides in the guide groove 141. And then the stroke pipe 25 and the inner cylinder 2 are driven to move in the first accommodating cavity along the axial direction of the outer cylinder 1. The guide protrusion and the guide groove 141 are arranged, so that the nut 6 can play a role in guiding when moving in the guide tube 14, and the nut 6 can be prevented from rotating relatively in the guide tube 14, so that when the screw rod 5 rotates, the nut 6 can smoothly drive the stroke tube 25 to move up and down. Of course, it should be understood that the structural protrusions or the groove structures between the nut 6 and the guide tube 14 are opposite, for example, the inner wall of the guide tube 14 may also be provided with a plurality of guide protrusions, the length direction of the guide protrusions is consistent with the axial direction of the guide tube 14, the position of the nut 6 corresponding to the guide protrusions is provided with the groove structures, when the nut 6 is located in the guide tube 14, the guide protrusions are located in the corresponding groove structures, and the same technical effects can also be achieved.

In a further embodiment, the guide tube 14 is fixedly connected to the base plate 12 by means of a fixing base 16. As shown in fig. 7 and 8, in the present embodiment, the fixing base 16 is preferably formed by two concave metal blocks 161 being engaged with each other and then fastened by a fastening member such as a bolt, as shown in fig. 9 and 10. Thereby forming a third receiving cavity in the fixing base 16. The axial direction of the third accommodating cavity is the same as the axial direction of the outer barrel 1, and the third accommodating cavity penetrates through two ends of the fixed seat 16 in the axial direction respectively. A through hole 122 is formed in the bottom plate 12 at a position corresponding to the third accommodating cavity, as shown in fig. 5. One end of the guide tube 14 is located in the third accommodating cavity, and the guide tube 14 is clamped with the inner wall of the third accommodating cavity through a limiting clamping piece 17, as shown in fig. 4. The limiting clamping piece 17 is preferably two long-strip keys, a long-strip groove is formed in each of two opposite inner walls of the third accommodating portion, two long-strip grooves are formed in the outer wall of the guide pipe 14 correspondingly, and the length direction of each long-strip groove is perpendicular to the axis direction of the guide pipe 14. Thus, when one end of the guide tube 14 is inserted into the third accommodating cavity, the long-strip groove on the outer wall of the guide tube 14 and the groove corresponding to the inner wall of the third accommodating cavity form a clamping cavity, and the upper limiting clamping piece 17 is installed so as to realize that one end of the guide tube 14 is firmly clamped with the fixed seat 16. The specific installation manner may be that one end of the guide tube 14 is inserted into one metal block 161, then all the limiting clamps 17 are installed correspondingly, then the other metal block 161 is clamped, and finally the two metal blocks 161 are fastened by a fastener.

The screw 5 has a connecting end, which is rotatably connected to the base plate 12 via the fixing seat 16. When the metal block 161 is fixed to the base plate 12, the connection end of the lead screw 5 passes through the through hole 122. The connecting end of the screw rod 5 is rotatably connected with the fixed seat 16 through a plurality of bearings, and the plurality of bearings are arranged at the connecting end of the screw rod 5 through connecting spacer sleeves 18 at intervals, as shown in fig. 10. Preferably, two bearings are used, one double-row angular contact ball bearing 185 and the other deep groove ball bearing 184, wherein the double-row angular contact ball bearing 185 is arranged close to the base plate 12. The double row angular contact ball bearing 185 is capable of withstanding large axial and radial forces. As shown in fig. 13, the connecting spacer 18 is in a sleeve shape and sequentially includes a first pipe portion 181, a second pipe portion 182 and a third pipe portion 183 along an axis, wherein an outer diameter of the second pipe portion 182 is larger than outer diameters of the first pipe portion 181 and the third pipe portion 183, so that a stepped structure is formed between the second pipe portion 182 and the first pipe portion 181 and the third pipe portion 183. The deep groove ball bearing 184 is arranged on the first pipe portion 181, and the double-row angular contact ball bearing 185 is arranged on the third pipe portion 183. In addition, correspondingly, the inner wall of the third accommodating cavity in the fixing seat 16 is designed to be step-shaped, as shown in fig. 4, 9 or 10, when the mounting seat is fixed on the bottom plate 12, the step-shaped structure of the inner wall of the third accommodating cavity can cooperate with the connecting spacer 18 to press and fix the outer rings of all the bearings. The connecting spacer 18 is clamped with the screw rod 5 through an anti-rotation key 186. Rectangular draw-in groove has been seted up to the link of lead screw 5 connect 18 inner walls of spacer sleeve and set up rectangular draw-in groove equally, the length direction of rectangular draw-in groove with the axis direction of lead screw 5 is unanimous. When connecting spacer 18 cover and establishing on the lead screw 5, will connect the rectangular draw-in groove on the spacer 18 with the rectangular draw-in groove that corresponds on the lead screw 5 aligns, later installs and prevents the commentaries on classics key 186. Relative rotation between the coupling spacer 18 and the screw 5 is avoided.

Because the screw rod 5 adopts the trapezoidal screw rod, a transmission gap exists between the trapezoidal screw rod and the nut 6 when the trapezoidal screw rod and the nut rotate forwards and backwards, which is not beneficial to the transmission precision of the whole device. In order to reduce or eliminate the transmission clearance generated by the forward rotation and the reverse rotation of the trapezoidal screw rod, the lifting upright post device of the embodiment is also provided with a spring clearance eliminating device 8. The spring anti-backlash device 8 is arranged on the side of the nut 6 facing the base plate 12. As shown in fig. 12, the spring anti-backlash device 8 is preferably composed of a plurality of springs 81 and end pressing pieces 82. The end pressing piece 82 is annular, a thread structure is arranged on the inner circular wall of the end pressing piece 82, and the end pressing piece 82 is sleeved on the screw rod 5 and is in threaded connection with the screw rod 5. A plurality of bolts, such as six bolts or other bolts, are arranged on the circular ring at intervals along the circumferential direction. Correspondingly, a plurality of jacks are formed in one side, facing the bottom plate 12, of the nut 6, and thread structures are arranged on the inner walls of the jacks. The jacks correspond to the bolts one to one. The bolts are inserted through the end press plates 82 and then fitted into the corresponding receptacles. Each bolt is sleeved with a spring 81, and the spring 81 is positioned between the end pressing plate 82 and the nut 6. The transmission clearance existing when the screw rod 5 and the nut 6 rotate forward and backward can be effectively adjusted by adjusting the screwing degree of the bolt in the corresponding jack.

As shown in fig. 2, the driving means 7 is preferably a driving motor. The connecting end of the screw rod 5 is sleeved with a belt wheel 19, the belt wheel 19 is positioned on one side of the bottom plate 12 far away from the outer cylinder wall 11, and the belt wheel 19 and the motor are driven by a transmission belt 9.

The position feedback device 4 is configured to feed back the position of the inner cylinder 2 in the outer cylinder 1. Preferably, the position feedback device 4 comprises a position collector 41 and a pull box 42. As shown in fig. 1, the pull string box 42 is fixed on the base plate 12, a plurality of transition wheels 422 are disposed on the base plate 12, and a pull string 421 of the pull string box 42, such as a steel wire rope, sequentially passes through the plurality of transition wheels 422, and is connected to the inner cylinder 2 after the path is changed by the transition wheels 422. In connection with the inner cylinder 2, a connection piece 212 may be provided on the inner wall of the inner cylinder wall 21, as shown in fig. 7. One end of the pull wire 421 may be connected to the connecting piece 212 by a hook or other connecting structure. The inner cylinder 2 is lifted, a steel wire rope of the pull line box 42 is pulled to be matched with a position collector 41 such as a multi-circle absolute value encoder or a potentiometer, the rotating angle of a pull line rotating shaft in the pull line box 42 is collected, and the lifting position of the inner cylinder 2 can be accurately fed back.

The lifting column device further comprises a first limit switch 311 and a second limit switch 143, wherein the first limit switch 311 is used as a lower limit switch and is used for limiting the lowest position of the inner cylinder 2 in a descending mode. The second limit switch 143 serves as an upper limit switch for limiting the highest position at which the inner cylinder 2 ascends. Preferably, the first limit switch 311 and the second limit switch 143 are both photoelectric switches. The first limit switch 311 is connected to the top plate 22 of the inner cylinder 2, as shown in fig. 7 or 8, the first limit switch 311 may be mounted on the mounting block 31, and the corresponding first limit stopper 151 is mounted on the guide sleeve 15, as shown in fig. 9. When the inner cylinder 2 descends until the first limit switch 311 descends to the position of the first limit catch 151, the first limit catch 151 blocks light, the first limit switch 311 triggers, and the inner cylinder 2 stops descending. By additionally arranging a plurality of buffering components such as rubber blocks on the bottom plate 12, the inner cylinder wall can be prevented from directly contacting the bottom plate 12, and a certain buffering protection effect can be achieved. The second limit switch 143 is mounted on the outer wall of the guide tube 14, and the corresponding second limit baffle 211 is disposed on the inner cylinder wall 21. The second limit switch 143 shown in fig. 7 or fig. 8 is located below the first limit sheet, and the second limit baffle 211 shown in fig. 7 or fig. 8 is located at the lower half portion of the inner wall of the inner cylinder wall 21. When the inner cylinder 2 rises until the second limit baffle 211 rises to the position of the second limit switch 143, the second limit baffle 211 blocks light, the second limit switch 143 triggers, and the inner cylinder 2 stops rising. When the LED lamp works normally, the limiting blocking piece continuously blocks light, and the limiting switch continuously triggers.

(4) the lifting upright post device has large unbalance loading capacity;

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A lifting upright post device is characterized by comprising an outer cylinder (1), an inner cylinder (2), a drag chain (3) and a position feedback device (4), a first accommodating cavity is arranged in the outer cylinder (1), an opening is arranged at one end of the outer cylinder (1) in the axial direction, the opening is communicated with the first accommodating cavity, the inner cylinder (2) and the drag chain (3) are respectively positioned in the first accommodating cavity, the inner cylinder (2) and the outer cylinder (1) have the same axial direction, the inner cylinder (2) can be driven to move in the outer cylinder (1) along the axial direction of the outer cylinder (1), one end of the drag chain (3) is connected with the outer cylinder (1), the other end of the drag chain (3) is connected with the inner cylinder (2), the position feedback device (4) is configured to feed back the position of the inner cylinder (2) in the outer cylinder (1).

2. The lifting column device according to claim 1, wherein the outer cylinder (1) comprises an outer cylinder wall (11) and a bottom plate (12), the outer cylinder wall (11) is tubular, one end of the outer cylinder wall (11) in the length direction is fixedly connected with the bottom plate (12), the outer cylinder wall (11) and the bottom plate (12) form the first accommodating cavity, and a plurality of friction plates are arranged between the outer cylinder wall (11) and the inner cylinder (2).

3. Lifting column device according to claim 2, characterized in that the friction plates comprise a plurality of first friction plates (13) and a plurality of second friction plates (23), the first friction plates (13) are fixedly mounted on the outer cylinder wall (11), the first friction plates (13) are arranged close to the opening of the outer cylinder wall (11), the second friction plates (23) are fixedly mounted on the side wall of the inner cylinder (2), and the second friction plates (23) are arranged close to the end of the inner cylinder (2) facing the bottom plate (12).

4. The lifting column device according to claim 3, characterized in that the first friction plates (13) are one or more groups, the first friction plates (13) are distributed along the axial direction of the outer cylinder wall (11), the second friction plates (23) are one or more groups, and the second friction plates (23) are distributed along the axial direction of the inner cylinder (2);

the friction plates further comprise a plurality of third friction plates (24), the third friction plates (24) are fixedly arranged on the side wall of the inner barrel (2), and the third friction plates (24) are located between the first friction plates (13) and the second friction plates (23).

5. The lifting column device according to claim 2, characterized in that the inner cylinder (2) comprises an inner cylinder wall (21) and a top plate (22), the inner cylinder wall (21) is tubular, one end of the inner cylinder wall (21) far away from the bottom plate (12) in the length direction is fixedly connected with the top plate (22), the inner cylinder wall (21) and the top plate (22) form a second accommodating cavity, the inner cylinder wall (21) and the outer cylinder wall (11) are coaxially arranged,

the outer barrel (1) further comprises a guide pipe (14), the guide pipe (14) is located in the first accommodating cavity, the guide pipe (14) is axially identical to the outer barrel wall (11), one end of the guide pipe (14) is fixedly connected with the bottom plate (12), a guide sleeve (15) is arranged at the other end of the guide pipe (14), the inner barrel wall (21) is sleeved on the guide pipe (14), one end of the drag chain (3) is fixedly connected with the guide pipe (14),

the inner cylinder (2) further comprises a stroke pipe (25), the stroke pipe (25) is located in an inner cavity of the guide pipe (14), one end, far away from the bottom plate (12), of the stroke pipe (25) penetrates through the guide sleeve (15) and the top plate (22) to be fixedly connected, the stroke pipe (25) can be driven to move in the guide pipe (14) along the axis direction of the guide pipe (14), and then the inner cylinder (2) is driven to move in the first accommodating cavity along the axis direction of the outer cylinder (1).

6. Lifting column device according to claim 5, characterized in that it further comprises a screw (5), a nut (6) and a drive means (7), the screw rod (5) is positioned in the inner cavity of the guide tube (14), the screw rod (5) and the guide tube (14) have the same axial direction, one end of the screw rod (5) is rotatably connected with the bottom plate (12), the nut (6) is sleeved on the screw rod (5), the nut (6) is connected with one end of the stroke pipe (25) facing the bottom plate (12), the driving device (7) drives the screw rod (5) to rotate to drive the nut (6) to move in the guide pipe (14) along the length direction of the guide pipe (14), and then the stroke pipe (25) and the inner cylinder (2) are driven to move in the first accommodating cavity along the axial direction of the outer cylinder (1).

7. Lifting column device according to claim 6, characterized in that the screw (5) is a trapezoidal screw, the nut (6) is in threaded connection with the travel tube (25), a spring anti-backlash device (8) is arranged on the side of the nut (6) facing the base plate (12),

the inner wall of the guide pipe (14) is provided with a plurality of guide grooves (141), the length direction of each guide groove (141) is consistent with the axial direction of the guide pipe (14), a protruding structure (61) is arranged at the position, corresponding to the guide grooves (141), of the nut (6), and when the nut (6) is located in the guide pipe (14), the protruding structure (61) is located in the corresponding guide groove (141); or

The inner wall of stand pipe (14) is equipped with a plurality of direction arch, the bellied length direction of direction with the axis direction of stand pipe (14) is unanimous, nut (6) correspond the bellied position of direction is provided with groove structure nut (6) are located when stand pipe (14) are interior, the direction arch is located corresponding groove structure.

8. Lifting column device according to claim 6, characterized in that it comprises a fixing base (16), the guide tube (14) being fixedly connected to the base plate (12) via the fixing base (16), the screw (5) having a connecting end, the connecting end being rotatably connected to the base plate (12) via the fixing base (16).

9. The lifting column device according to claim 8, wherein a third accommodating cavity is arranged in the fixing seat (16), the axial direction of the third accommodating cavity is the same as the axial direction of the outer barrel (1), the third accommodating cavity respectively penetrates through two ends of the fixing seat (16) in the axial direction, a through hole (122) is formed in the position of the bottom plate (12) corresponding to the third accommodating cavity, one end of the guide tube (14) is located in the third accommodating cavity, the guide tube (14) is clamped with the inner wall of the third accommodating cavity through a limiting clamping piece (17), the connecting end of the lead screw (5) penetrates through the through hole (122), the connecting end of the lead screw (5) is rotatably connected with the fixing seat (16) through a plurality of bearings, and the plurality of bearings are alternately sleeved on the connecting end of the lead screw (5) through a connecting spacer sleeve (18), the connecting spacer bush (18) is clamped with the screw rod (5) through an anti-rotation key (186).

10. The lifting column device according to claim 9, characterized in that the connecting end of the screw rod (5) is sleeved with a belt wheel (19), the belt wheel (19) is located on the side of the bottom plate (12) far away from the outer cylinder wall (11), the belt wheel (19) and the driving device (7) are driven by a transmission belt (9), the bearing is a double-row angular contact ball bearing (185) and/or a deep groove ball bearing (184),

the position feedback device (4) comprises a position collector (41) and a pull line box (42), the pull line box (42) is fixed on the bottom plate (12), a plurality of transition wheels (422) are arranged on the bottom plate (12), a pull line (421) of the pull line box (42) sequentially penetrates through the transition wheels (422) to be connected with the inner cylinder (2), and the position collector (41) collects the rotation angle of a pull line rotating shaft in the pull line box (42);

the lifting upright post device further comprises a first limit switch (311) and a second limit switch (143), the first limit switch (311) is used for limiting the lowest position of the inner cylinder (2) in a descending mode, and the second limit switch (143) is used for limiting the highest position of the inner cylinder (2) in a ascending mode.