CN211712529U

CN211712529U - Lifting upright post

Info

Publication number: CN211712529U
Application number: CN201922140086.9U
Authority: CN
Inventors: 胡仁昌; 陆小健; 潘坚
Original assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Current assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-10-20
Anticipated expiration: 2029-12-03

Abstract

The utility model provides a lifting upright post, which comprises a driving device, a lifting pipe and a transmission assembly, wherein the lifting pipe comprises a first pipe, a second pipe, a third pipe and a fourth pipe, the lower end of the fourth pipe is fixed on the driving device, the transmission assembly comprises a first screw rod, a hollow second screw rod and a hollow third screw rod which are sequentially sleeved from inside to outside, the output end of the driving device is in transmission fit with the first screw rod and can drive the first screw rod to rotate, the lower end of the second screw rod is provided with a first nut in threaded transmission connection with the first screw rod, the lower end of the third screw rod is provided with a second nut in threaded transmission connection with the second screw rod, the lower end of the first pipe is provided with a third nut in threaded transmission connection with the third screw rod, adjacent screw rods are in threaded transmission connection, the nuts are positioned between two adjacent screw rods, a device for fixing the nuts is not needed, so that the axial direction and the radial direction of the transmission assembly are more compact, further reduce the installation distance of lift stand, realize the low installation distance of lift stand long stroke.

Description

Lifting upright post

Technical Field

The utility model relates to a lift stand technical field especially relates to a lift stand of low installation distance.

Background

The lifting stand column is widely applied in daily life due to the advantages of adjustable height and convenience in carrying, the installation distance of the lifting stand column refers to the height of the lifting stand column in a contraction state, the lifting stand column on the market is generally a two-section lifting pipe or a three-section lifting pipe at present, and in order to meet a long stroke, the installation distance of the lifting stand column is large, so that the height of the lifting stand column in the contraction state is still high, and the carrying is still not convenient enough.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lift stand of low installation distance.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a lifting column, including drive arrangement, the fall way and be located the inside transmission assembly of fall way, the fall way includes the first pipe of suit from inside to outside in proper order, the second pipe, third pipe and fourth pipe, the lower extreme of fourth pipe is fixed in on the drive arrangement, the transmission assembly includes the first lead screw of suit from inside to outside in proper order, hollow second lead screw and hollow third lead screw, drive arrangement's output and first lead screw transmission cooperation and can drive first lead screw rotatory, the lower extreme of second lead screw is equipped with the first nut of being connected with first lead screw thread drive, the lower extreme of third lead screw is equipped with the second nut of being connected with second lead screw thread drive, the lower extreme of first pipe is equipped with the third nut of being connected with third lead screw thread drive.

Furthermore, a first guide sleeve for limiting the axial position of the first nut is arranged at the upper end of the first screw rod, a second guide sleeve for limiting the axial position of the second nut is arranged at the upper end of the second screw rod, and a third guide sleeve for limiting the axial position of the third nut is arranged at the upper end of the third screw rod.

Furthermore, the outer wall of the first guide sleeve is matched with the inner wall of the second screw rod, the outer wall of the second guide sleeve is matched with the inner wall of the third screw rod, and the outer wall of the third guide sleeve is matched with the inner wall of the first pipe.

Furthermore, a positioning groove is formed in the circumferential direction of the third screw rod, and the third guide sleeve is rotatably arranged on the positioning groove.

Furthermore, an opening which is convenient for the third guide sleeve to be pressed into the positioning groove in the radial direction is formed in the third guide sleeve.

Furthermore, the first guide sleeve is fixedly connected with the first screw rod through a screw, and the second guide sleeve is fixedly connected with the second screw rod through a screw.

Furthermore, all be equipped with the oil groove on the inner wall of second lead screw and third lead screw, the oil groove sets up along the axial of lead screw.

Furthermore, the lower pot head of first lead screw is equipped with self-lock device, and self-lock device includes torsion spring seat and the torsional spring of cover on locating the torsion spring seat.

Further, the third nut and the first pipe are fixed through riveting.

Further, the lifting pipe is a square pipe.

After the technical scheme is adopted, the utility model has the advantages of as follows:

1. the elevator pipe includes the first pipe of suit from inside to outside in proper order, the second pipe, third pipe and fourth pipe, through setting the lift stand to four sections, can reduce the installation distance of every section of elevator pipe, make the installation distance lower, first lead screw, the second lead screw, connect through screw transmission between third lead screw and the first pipe, and the nut is installed on adjacent lead screw, be located between two adjacent lead screws, need not to set up fixation nut's device in addition, make the axial of transmission assembly all compacter with radially, further reduce the installation distance of lift stand, realize the low installation distance long stroke of lift stand.

2. The axial positions of the first nut, the second nut and the third nut are limited respectively by arranging the first guide sleeve, the second guide sleeve and the third guide sleeve, so that the axial moving distance of each nut is limited, namely the axial position of each screw rod is limited.

3. The outer wall of the first guide sleeve is matched with the inner wall of the second screw rod, so that when the first guide sleeve moves in the second screw rod, the transmission is stable, and the integral lifting is stable; in a similar way, the second guide sleeve is matched with the inner wall of the third screw rod, and the third guide sleeve is matched with the inner wall of the first pipe, so that the transmission in the whole lifting process is stable.

4. Through set up the constant head tank in the circumference of third lead screw, the third uide bushing rotationally sets up in the constant head tank for the axial position of third uide bushing and third lead screw is fixed, but the circumference direction free rotation, and then makes and can take place relative rotation between third lead screw and the first pipe.

5. Through set up the opening on the third uide bushing, the third uide bushing radially impresses in the constant head tank through the opening for the installation of third uide bushing is more convenient.

6. The first guide sleeve is fixedly connected with the first screw rod through a screw, and the second guide sleeve is fixedly connected with the second screw rod through a screw, so that the first guide sleeve and the second guide sleeve are convenient to disassemble and assemble, and meanwhile, the connection is reliable due to the self-locking property of threads.

7. All be provided with the oil groove on the inner wall of second lead screw and third lead screw, the oil groove sets up along the axial of lead screw, makes things convenient for the processing of second lead screw and third lead screw, and the grease can be stored to the oil groove simultaneously, and then reduces frictional force between first uide bushing and the second lead screw, the frictional force between second uide bushing and the third lead screw.

8. Through setting up torsional spring seat and torsional spring, the axial position of torsional spring is restricted to the torsional spring seat, and when transmission assembly atress had the shrink trend, the rotation of first lead screw was restricted to the torsional spring, played the effect of auto-lock for transmission assembly's use is more reliable.

9. The third nut is fixed on the first pipe through riveting, so that the third nut cannot rotate circumferentially, and the riveting process is simple and the connection is reliable.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural view of the lifting column according to the first embodiment of the present invention.

Fig. 2 is a schematic view of a part of the structure of the lifting column according to the first embodiment of the present invention.

Fig. 3 is a cross-sectional view of the lifting column according to the first embodiment of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is an enlarged view at B in fig. 3.

Fig. 6 is a schematic view of the cooperation between the third screw rod and the third guide sleeve in the lifting column according to the first embodiment of the present invention.

Fig. 7 is a schematic structural view of the lifting column according to the second embodiment of the present invention.

Fig. 8 is a schematic view of a part of the structure of the lifting column according to the second embodiment of the present invention.

The names of the components marked in the figures are as follows:

100. a drive device; 200. a lifting pipe; 210. a first tube; 211. a third nut; 220. a second tube; 230. a third tube; 240. a fourth tube; 300. a transmission assembly; 310. a first lead screw; 311. a first guide sleeve; 312. a torsion spring; 313. a torsion spring seat; 320. a second lead screw; 321. a first nut; 322. a second guide sleeve; 330. a third screw rod; 331. a second nut; 332. a third guide sleeve; 3321. an opening; 333. positioning a groove; 400. a first slider; 500. a second slider; 600. a third slider; 800. an oil groove.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments. It is to be understood that the following terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like are used in an orientation or positional relationship relative to one another only as illustrated in the accompanying drawings and are used merely for convenience in describing and simplifying the invention, and do not indicate or imply that the device/component so referred to must have a particular orientation or be constructed and operated in a particular orientation and therefore should not be considered as limiting the invention.

The first embodiment is as follows:

as shown in fig. 1 to 4, the present invention provides a lifting column with a low installation distance, comprising a driving device 100, a lifting tube 200 and a transmission assembly 300 located inside the lifting tube 200, wherein the lifting tube 200 comprises a first tube 210, a second tube 220, a third tube 230 and a fourth tube 240 which are sequentially sleeved from inside to outside, the installation distance of each lifting tube can be reduced by setting the lifting column into four sections, so that the installation distance is low, the lower end of the fourth tube 250 is fixed on the driving device 100, the driving device is located at the lower end of the lifting column, the upper end of the first tube 210 is fixed on a lifting platform, the lifting column is in an upside-down state, the transmission assembly 300 comprises a first lead screw 310, a hollow second lead screw 320 and a hollow third lead screw 330 which are sequentially sleeved from inside to outside, the output end of the driving device 100 is in transmission fit with the first lead screw 310 and can drive the first lead screw 310 to rotate, the lower end of the second lead screw 320 is provided with a first nut 321 in threaded transmission connection with the first lead screw 310, the lower end of the third screw 330 is provided with a second nut 331 in threaded transmission connection with the second screw 320, the lower end of the first pipe 210 is provided with a third nut 211 in threaded transmission connection with the third screw 330, the first screw, the second screw, the third screw and the first pipe are in threaded transmission connection, the nuts are arranged on the adjacent screws and positioned between the two adjacent screws, and a device for fixing the nuts is not needed to be additionally arranged, so that the transmission assembly is more compact in axial direction and radial direction, the mounting distance of the lifting upright column is further reduced, and the low mounting distance and the long stroke of the lifting upright column are realized.

As shown in fig. 5, in the present embodiment, the upper end of the first lead screw 310 is provided with a first guide sleeve 311 for limiting the axial position of the first nut 321, and the first guide sleeve 311 is fixedly connected with the first lead screw 310 through a screw; the upper end of the second screw rod 320 is provided with a second guide sleeve 322 for limiting the axial position of the second nut 331, and the second guide sleeve 322 is fixedly connected with the second screw rod 320 through a screw; the upper end of the third screw 330 is provided with a third guide sleeve 332 for limiting the axial position of the third nut 341, referring to fig. 6, the third screw 330 is circumferentially provided with a positioning groove 333, the third guide sleeve 332 is provided with an opening 3321, and the third guide sleeve is radially pressed into the positioning groove through the opening, so that the axial positions of the third guide sleeve and the third screw are fixed, the third guide sleeve can freely rotate in the circumferential direction, and the third screw and the first pipe can rotate relatively.

The outer wall of the first guide sleeve 311 is matched with the inner wall of the second screw rod 320, so that the transmission is stable when the first guide sleeve 311 moves in the second screw rod 320; the outer wall of the second guide sleeve 322 is matched with the inner wall of the third screw rod 330, so that the transmission is stable when the second guide sleeve 322 moves in the third screw rod 330; the elevator tube 200 is a square tube, can restrict the rotation between the adjacent elevator tubes, and the outer wall of the third guide sleeve 332 matches with the inner wall of the first tube 210, so the third guide sleeve is a square guide sleeve, so that when the third guide sleeve moves in the first tube, the transmission is relatively stable, and further, the transmission in the whole elevator process is relatively stable.

The ascending operation process of the lifting upright column comprises the following steps: the output end of the driving device 100 drives the first lead screw 310 to rotate, and since the third nut 211 is fixed on the first tube 210 and cannot rotate, and the thread lead angle of the first nut 321 is the largest, the first nut 321 moves upwards along the first lead screw 310 and drives the rest lead screws to move upwards integrally, and at this time, the first guide sleeve 311 rotates and translates in the second lead screw 320, so that the stability of the overall movement is ensured; when the first nut 321 contacts the first guide sleeve 311, the axial movement of the first lead screw 310 stops, the second lead screw 320 rotates along with the first lead screw 310, at this time, the lead angle of the second nut 331 is the largest between the second nut 331 and the third nut 211, the second nut 331 starts to move upwards along the second lead screw 320, and at this time, the second guide sleeve 322 rotates and translates in the third lead screw 330, so that the stability of the overall movement is ensured; when the second nut 331 contacts the second guide sleeve 322, the axial movement of the second lead screw 320 stops, the third lead screw 330 rotates along with the first lead screw 310 and the second lead screw 320, at this time, the third nut 221 starts to move upwards along the third lead screw 330, at this time, the third guide sleeve 332 moves in the first pipe 210 in a translation manner, so that the stability of the overall movement is ensured, when the third nut 211 contacts the third guide sleeve 332, the stroke of the transmission assembly reaches the maximum, and when the second lead screw 320, the third lead screw 330 and the first pipe 210 move upwards, the second pipe 220, the third pipe 230 and the fourth pipe 240 are driven to move upwards, so that the lifting of the lifting upright column is realized.

Similarly, when the lifting column descends, the first screw rod 310 rotates, the first nut 321 moves downwards along the first screw rod 310, then the second nut 331 moves downwards along the second screw rod 320, the third nut 341 moves downwards along the third screw rod 330, and when the second screw rod 320, the third screw rod 330 and the first pipe 210 move downwards, the second pipe 220, the third pipe 230 and the fourth pipe 240 are driven to move downwards, so that the lifting column descends.

Be equipped with first slider 400 between first pipe 210 and the second pipe 220, first slider 400 is fixed in the lower extreme of first pipe 210, be equipped with second slider 500 between second pipe 220 and the third pipe 230, second slider 500 is fixed in the lower extreme of second pipe 220, be equipped with third slider 600 between third pipe 230 and the fourth pipe 240, third slider 600 is fixed in the lower extreme of third pipe 230, the upper end of second pipe, third pipe and fourth pipe all is provided with quiet slider, the upper limit of second pipe 220 is realized through the contact of quiet slider on second slider and the third pipe, the upper limit of third pipe 230 is realized through the contact of quiet slider on third slider and the fourth pipe.

The lower end of the inner wall of the fourth pipe 240 is provided with a lower slider (not shown in the figure), and the lower limit of the second pipe 220 is realized by the second pipe 220 contacting the lower slider.

All be equipped with oil groove 800 on the inner wall of second lead screw 320 and third lead screw 330, oil groove 800 sets up along the axial of lead screw, and the processing of second lead screw and third lead screw is made things convenient for in the setting of oil groove, and the grease can be stored to the oil groove simultaneously, and then reduces frictional force between first uide bushing and the second lead screw, the frictional force between second uide bushing and the third lead screw.

The lower pot head of first lead screw 310 is equipped with self-lock device, and self-lock device includes torsion spring seat 313 and the torsional spring 312 of cover on torsion spring seat 313, and torsion spring seat 313 restricts the axial position of torsional spring 312, and when transmission assembly 300 atress had the shrink trend, torsional spring 312 restricted first lead screw 310's rotation, played the effect of auto-lock for transmission assembly's use is more reliable.

The third nut 211 and the first pipe 210 are fixed by riveting, so that the third nut cannot rotate circumferentially, and the riveting process is simple and the connection is reliable.

Example two:

the main difference between the present embodiment and the first embodiment is that the lifting column is in a normal state.

As shown in fig. 7 and 8, when the lifting column is in the upright state, the driving device 100 is fixed on the lifting platform, the lifting tube 200 is located at the lower end of the driving device 100, the first nut 321 is located at the upper end of the second lead screw 320, the second nut 331 is located at the upper end of the third lead screw 330, and the third nut 221 is located at the upper end of the first tube 210.

In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims

1. The utility model provides a lifting column, include drive arrangement, fall way and be located the inside transmission assembly of fall way, a serial communication port, the fall way includes the first pipe of suit from inside to outside in proper order, the second pipe, third pipe and fourth pipe, the lower extreme of fourth pipe is fixed in on the drive arrangement, the transmission assembly includes the first lead screw of suit from inside to outside in proper order, hollow second lead screw and hollow third lead screw, drive arrangement's output and first lead screw transmission cooperation just can drive first lead screw rotatory, the lower extreme of second lead screw is equipped with the first nut of being connected with first lead screw thread drive, the lower extreme of third lead screw is equipped with the second nut of being connected with second lead screw thread drive, the lower extreme of first pipe is equipped with the third nut of being connected with third lead screw thread drive.

2. The lifting column according to claim 1, characterized in that the upper end of the first screw rod is provided with a first guide sleeve for limiting the axial position of the first nut, the upper end of the second screw rod is provided with a second guide sleeve for limiting the axial position of the second nut, and the upper end of the third screw rod is provided with a third guide sleeve for limiting the axial position of the third nut.

3. The lifting column according to claim 2, wherein the outer wall of the first guide sleeve is fitted to the inner wall of the second lead screw, the outer wall of the second guide sleeve is fitted to the inner wall of the third lead screw, and the outer wall of the third guide sleeve is fitted to the inner wall of the first pipe.

4. The lifting column according to claim 2, wherein the third screw has a positioning groove formed in a circumferential direction thereof, and the third guide sleeve is rotatably disposed on the positioning groove.

5. A lifting column as claimed in claim 4, characterized in that the third guide sleeve is provided with an opening for facilitating radial pressing of the third guide sleeve into the positioning slot.

6. The lifting column according to claim 2, wherein the first guide sleeve is fixedly connected with the first screw rod through a screw, and the second guide sleeve is fixedly connected with the second screw rod through a screw.

7. The lifting column according to claim 1, wherein the inner walls of the second screw rod and the third screw rod are provided with oil grooves, and the oil grooves are arranged along the axial direction of the screw rods.

8. The lifting column according to claim 1, wherein the lower end of the first lead screw is sleeved with a self-locking device, and the self-locking device comprises a torsion spring seat and a torsion spring sleeved on the torsion spring seat.

9. A lifting column as claimed in any one of claims 1 to 8, wherein the third nut is secured to the first tube by riveting.

10. The lifting column of any one of claims 1-8, wherein the lifting tube is a square tube.