CN209800461U

CN209800461U - Lifting upright post

Info

Publication number: CN209800461U
Application number: CN201821646191.9U
Authority: CN
Inventors: 李威强; 李兵
Original assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Current assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Priority date: 2018-10-10
Filing date: 2018-10-10
Publication date: 2019-12-17
Anticipated expiration: 2028-10-10

Abstract

The utility model provides a lifting stand column, including lift pipe, bottom plate and transmission assembly, the lift pipe includes the inner tube, transmission assembly includes the drive screw who fixes on the bottom plate, but the hollow mandrel that relatively stretches out and draws back with drive screw axial and the stand pipe that relatively stretches out and draws back with hollow mandrel axial, the lower extreme of inner tube is connected with the first drive nut with hollow mandrel screw-thread fit, the lower extreme of hollow mandrel is connected with the second drive nut with drive screw-thread fit, the outside of second drive nut is equipped with locking structure, when the lift pipe is two-section lift pipe, the lift pipe still includes the outer tube, locking structure is located the outer tube and with outer tube clearance fit; when the lifting pipe is a three-section lifting pipe, the lifting pipe further comprises a middle pipe and an outer pipe, and the locking structure is fixedly connected with the middle pipe, so that the same transmission assembly can be installed in the two-section lifting pipe and the three-section lifting pipe, the universality of the transmission assembly is high, and the processing cost of the lifting stand column is reduced.

Description

Lifting upright post

Technical Field

The utility model relates to a lifting upright post.

Background

The lifting column is widely applied in daily life due to the advantages of adjustable height and convenient carrying, the lifting pipe of the lifting column on the market at present generally adopts a two-section lifting pipe or a three-section lifting pipe, a two-section transmission assembly is usually installed in the two-section lifting pipe, a three-section transmission assembly is installed in the three-section lifting pipe, and the two-section transmission assembly and the three-section transmission assembly have no universality, so that the transmission assemblies need to be respectively processed, the processing cost is high, and the production is inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lifting column, the fall way both can select two section formulas fall way and also can select three section formulas fall way.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a lifting stand column comprises a lifting pipe, a bottom plate and a transmission assembly, wherein the bottom plate is arranged at the lower end of the lifting pipe, the transmission assembly is positioned in the lifting pipe, the lifting pipe comprises an inner pipe, the transmission assembly comprises a transmission screw fixed on the bottom plate, a hollow mandrel capable of axially extending and retracting relative to the transmission screw and a guide pipe capable of axially extending and retracting relative to the hollow mandrel, the guide pipe is positioned in the inner pipe, the lower end of the inner pipe is connected with a first transmission nut in threaded fit with the hollow mandrel, the lower end of the hollow mandrel is connected with a second transmission nut in threaded fit with the transmission screw, a locking structure for limiting the second transmission nut to rotate is arranged outside the second transmission nut, when the lifting pipe is a two-section lifting pipe, the lifting pipe also comprises an outer pipe, and the locking structure is positioned in the; when the lifting pipe is a three-section lifting pipe, the lifting pipe also comprises a middle pipe and an outer pipe, and the locking structure is fixedly connected with the middle pipe.

Furthermore, a slot is formed in the side wall of the locking structure, a detachable insertion block is arranged in the slot, and when the lifting pipe is a two-section lifting pipe, the insertion block is in a detachable state; when the lifting pipe is a three-section lifting pipe, the side wall of the middle pipe is provided with a jack, and the insertion block penetrates through the jack to be matched with the insertion slot so that the locking structure and the middle pipe are relatively fixed in the axial direction.

Further, the fall way is three-section formula fall way, and the one end that the inserted block is close to the outer tube is equipped with the limiting plate, and the limiting plate is located between well pipe and the outer tube.

Further, outer tube and well pipe are square pipe, and the limiting plate is the L type and is located the right angle department of well pipe.

Further, the surface of the limiting plate contacting with the outer pipe is a smooth surface.

Furthermore, the slots are provided with a plurality of slots which are uniformly distributed on the circumference of the locking structure.

Furthermore, when the lifting pipe is a two-section lifting pipe, the maximum telescopic distance of the transmission assembly is smaller than the height of the outer pipe.

further, when the lifting pipe is a three-section lifting pipe, the maximum telescopic distance between the transmission screw and the hollow mandrel is smaller than the height of the outer pipe, and the maximum telescopic distance between the hollow mandrel and the guide pipe is smaller than the height of the middle pipe.

Furthermore, the locking structure comprises a first locking block and a second locking block, the first locking block and the second locking block are locked to form a containing groove, and the second transmission nut is located in the containing groove.

Furthermore, a limiting hole is formed in the accommodating groove, and a limiting bulge matched with the limiting hole is formed in the second transmission nut; or, a limiting bulge is arranged in the accommodating groove, and a limiting hole matched with the limiting bulge is formed in the second transmission nut.

The utility model discloses in "demolish the state" for the state that the inserted block was not installed in the slot.

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

1. When the fall way is two section formula fall ways, locking structure and outer tube clearance fit, because of drive screw fixes spacing on the bottom plate on the axial, cavity mandrel and drive screw realize the axial through second drive nut and stretch out and draw back relatively, consequently the second drive nut drives the cavity mandrel and goes up and down along drive screw's axial, the stand pipe realizes the axial through first drive nut with the cavity mandrel and stretches out and draw back relatively, first drive nut fixes the lower extreme at the inner tube, first drive nut drives the inner tube and goes up and down when going up and down along the axial of cavity mandrel, thereby realize the lift of lift stand. When the elevator pipe is three-section elevator pipe, locking structure and well tubular fixed connection for second drive nut can drive well tubular through locking structure and go up and down when going up and down along drive screw's axial, thereby realizes that same transmission assembly both can install in two-section elevator pipe and can install in three-section elevator pipe, makes transmission assembly's commonality stronger, reduces the processing cost of lift stand.

2. Through setting up slot and inserted block, only need demolish the inserted block and just can make locking structure and outer tube clearance fit, pass the jack through with the inserted block and install and make locking structure and well pipe relatively fixed in the axial in the slot for locking structure can drive well pipe and go up and down, the simple structure of inserted block and slot, simple to operate makes the dismouting of lift stand all fairly simple, makes the transmission assembly can be in two section formulas riser and three section formulas riser simultaneously general, reduction in production cost.

3. Through set up the limiting plate on the inserted block, the radial position that the limiting plate located the restriction inserted block between well pipe and the outer tube guarantees that the inserted block can fix the axial relative position of locking structure and well pipe.

4. Be square pipe through setting up outer tube and well pipe for circumferential direction can not take place between outer tube and the well pipe, be the L type and be located the right angle department of well pipe through setting up the limiting plate, make the limiting plate can contact two faces of well pipe, further guarantee the spacing effect of limiting plate.

5. The surface contacting with the outer tube through the limiting plate is a smooth surface, so that friction between the limiting plate and the outer tube is reduced, and lifting between the lifting tubes is more reliable.

6. Through setting up a plurality of slots for fixing between locking structure and the well pipe is more reliable, and a plurality of slot equipartitions set up in locking structure's week, make locking structure's atress more even.

7. when the elevator is two-section elevator, the maximum telescopic distance of the transmission assembly is less than the height of the outer pipe, so that when the transmission assembly is located at the maximum extension position, a partial overlapping section still exists between the inner pipe and the outer pipe, the inner pipe and the outer pipe are guaranteed to be always in a matching state, and cannot be separated, and the use reliability of the lifting stand column is guaranteed.

8. When the lifting pipe is a three-section lifting pipe, the maximum telescopic distance between the transmission screw and the hollow mandrel is smaller than the height of the outer pipe, so that when the transmission assembly is positioned at the maximum extension position, a part of overlapped sections still exist between the middle pipe and the outer pipe, and the middle pipe and the outer pipe are ensured to be always in a matched state and cannot be separated; through setting up the height that the biggest flexible distance between cavity mandrel and the stand pipe is less than well pipe for when transmission assembly was in the biggest extension position, still had partial coincidence section between inner tube and the well pipe, guarantee to be in the cooperation state always between inner tube and the well pipe, can not part, and then guarantee the reliability that the lift stand used.

9. The locking structure is a first locking block and a second locking block, the first locking block and the second locking block are locked to form a containing cavity, and the second transmission nut is located in the containing groove, so that the locking structure is simple and convenient to process and install.

10. Through set up spacing hole and spacing arch on storage tank and second drive nut for locking structure and second drive nut's position are fixed, can go up and down in step, and can not take place circumferential direction and rotate.

Drawings

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

Fig. 1 is a schematic structural view of a transmission assembly in a lifting column of the present invention.

Fig. 2 is a cross-sectional view of the lifting column when the elevator tube is a two-section elevator tube.

Fig. 3 is a cross-sectional view of the lifting column when the elevator tube is a three-section elevator tube.

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

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

fig. 6 is a schematic diagram of the structure of the lifting column when the outer tube is removed when the elevator tube is a three-section elevator tube.

Fig. 7 is an exploded view of the locking structure and the second driving nut in the lifting column of the present invention.

Fig. 8 is a schematic structural view of the insert block in the lifting column of the present invention.

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

1. A drive screw; 11. a second transmission member; 2. a hollow mandrel; 21. a first transmission member; 3. a guide tube; 4. a sleeve; 5. a drive device; 6. a second drive nut; 61. a locking structure; 611. a first blocking block; 612. a second locking block; 613. a slot; 614. inserting a block; 6141. a limiting plate; 615. a limiting hole; 62. a limiting bulge; 7. a first drive nut; 8. an inner tube; 9. an outer tube; 91. a base plate; 10. a middle tube; 101. and (4) inserting the jack.

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.

As shown in fig. 1 to 8, the present invention provides a lifting column, which comprises a lifting pipe, a bottom plate 91 disposed at a lower end of the lifting pipe, a transmission assembly and a driving device 5 disposed in the lifting pipe, wherein the lifting pipe comprises an inner pipe 8, the transmission assembly comprises a transmission screw 1 fixed on the bottom plate 91, a hollow mandrel 2 axially relatively extendable and retractable with the transmission screw 1, and a guide pipe 3 axially relatively extendable and retractable with the hollow mandrel 2, the guide pipe 3 is disposed in the inner pipe 8, a first transmission nut 7 threadedly engaged with the hollow mandrel 2 is connected to a lower end of the inner pipe 8, a second transmission nut 6 threadedly engaged with the transmission screw 1 is connected to a lower end of the hollow mandrel 2, a locking structure 61 is disposed outside the second transmission nut 6 for limiting the rotation of the second transmission nut 6, when the fall pipe is two-section formula fall pipe, the fall pipe still includes outer tube 9, and locking structure 61 is located outer tube 9 and with outer tube 9 clearance fit. Because of drive screw 1 fixes spacing on bottom plate 91 on the axial, cavity mandrel 2 and drive screw 1 realize the axial through second drive nut 6 and stretch out and draw back relatively, consequently second drive nut 6 drives cavity mandrel 2 and goes up and down along drive screw 1's axial, the stand pipe 3 realizes the axial through first drive nut 7 with cavity mandrel 2 and stretches out and draw back relatively, first drive nut 7 is fixed at the lower extreme of inner tube 8, first drive nut 7 drives inner tube 8 and goes up and down when going up and down along the axial of cavity mandrel 2, thereby realize the lift of lift stand, make two sections intraductal three section drive pipes that have of lift, promote the lifting speed of lift stand.

When the fall way is three-section formula fall way, the fall way still includes well pipe 10 and outer tube 9, locking structure 61 and well pipe 10 fixed connection for second drive nut 6 can drive well pipe 10 through locking structure 61 and go up and down when going up and down along drive screw 1's axial, thereby realize that same transmission assembly both can install in two-section formula fall way and can install in three-section formula fall way, make transmission assembly's commonality stronger, reduce the processing cost of lift stand.

Be equipped with slot 613 on the lateral wall of locking structure 61, be equipped with detachable inserted block 614 in the slot 613, be two-section formula elevator pipe when the elevator pipe, inserted block 614 is in and demolishs the state, inserted block 614 does not install and makes locking structure 61 and outer tube 9 clearance fit in slot 613, be three-section formula elevator pipe when the elevator pipe, be equipped with jack 101 on the lateral wall of well pipe 10, inserted block 614 passes jack 101 and cooperates messenger locking structure 61 and well pipe 10 relatively fixed in the axial with slot 613, make locking structure 61 can drive well pipe 10 and go up and down, the simple structure of inserted block 614 and slot 613, and simple to operate makes the dismouting of lift stand all fairly simple, make the transmission assembly can be general in two-section formula elevator pipe and three-section formula elevator pipe simultaneously, and reduction in production cost.

Specifically, the hollow mandrel 2 is provided with external threads, the sleeve 4 is sleeved outside the hollow mandrel 2, the lower end of the sleeve 4 is fixedly connected with the first transmission nut 7, and the guide pipe 3 is limited in the sleeve 4 in a rotatable mode. The guide pipe 3 is in transmission connection with the hollow mandrel 2 through a first transmission part 21, the first transmission part 21 is fixedly arranged at the upper end of the hollow mandrel 2, and the cross section shape of the first transmission part 21 is matched with that of the guide pipe 3; the transmission screw rod 1 is in transmission connection with the hollow mandrel 2 through a second transmission part 11, the second transmission part 11 is fixedly installed at the upper end of the transmission screw rod 1, and the cross section shape of the second transmission part 11 is matched with that of the hollow mandrel 2.

The elevator tube is the operation process of the lifting upright post of the two-section elevator tube: drive arrangement 5 drive stand pipe 3 rotates, stand pipe 3 drives cavity mandrel 2 synchronous revolution through first transmission part 21, cavity mandrel 2 drives drive screw 1 rotatory through second transmission part 11, because drive screw 1 and bottom plate 91 are spacing on the axial, consequently second drive nut 6 goes up and down to the axial along drive screw 1, cavity mandrel 2 goes up and down along with second drive nut 6 in rotatory, first drive nut 7 goes up and down along the axial of cavity mandrel 2, first drive nut 7 drives inner tube 8 and goes up and down, thereby realize the lift of lift stand.

The elevator tube is the operation process of the lifting upright post of the three-section elevator tube: drive arrangement 5 drive stand pipe 3 rotates, stand pipe 3 drives cavity mandrel 2 synchronous revolution through first transmission part 21, cavity mandrel 2 drives transmission screw 1 rotatoryly through second transmission part 11, because transmission screw 1 and bottom plate 91 are spacing on the axial, consequently second transmission nut 6 goes up and down and drives well pipe 10 through locking structure 61 to the axial along transmission screw 1 and goes up and down, cavity mandrel 2 goes up and down along with second transmission nut 6 in the rotatory time, first transmission nut 7 goes up and down along the axial of cavity mandrel 2, first transmission nut 7 drives inner tube 8 and goes up and down, thereby realize the lift of lift stand.

In this embodiment, when the elevator is two-section elevator, the biggest flexible distance of transmission assembly is less than the height of outer tube 9 for when transmission assembly was in the biggest extension position, still had the partial coincidence section between inner tube 8 and the outer tube 9, guarantee to be in the cooperation state between inner tube 8 and the outer tube 9 always, can not part, and then guarantee the reliability that the lift stand used.

When the lifting pipe is a three-section lifting pipe, the maximum telescopic distance between the transmission screw rod 1 and the hollow mandrel 2 is smaller than the height of the outer pipe 9, so that when the transmission assembly is at the maximum extension position, a part of overlapped sections still exist between the middle pipe 10 and the outer pipe 9, and the middle pipe 10 and the outer pipe 9 are ensured to be always in a matched state and cannot be separated; the maximum telescopic distance between the hollow mandrel 2 and the guide pipe 3 is smaller than the height of the middle pipe 10, so that when the transmission assembly is located at the maximum extension position, a part of overlapped sections still exist between the inner pipe 8 and the middle pipe 10, the inner pipe 8 and the middle pipe 10 are guaranteed to be always in a matched state and cannot be separated, and the use reliability of the lifting upright column is guaranteed.

When the lifting pipe is a three-section lifting pipe, a limiting plate 6141 is arranged at one end, close to the outer pipe 9, of the inserting block 614, the limiting plate 6141 is located between the middle pipe 10 and the outer pipe 9, and the radial position of the inserting block 614 is limited, so that the inserting block 614 can fix the axial relative position of the locking structure 61 and the middle pipe 10.

Outer tube 9 and well pipe 10 are square pipe for circumferential direction can not take place between outer tube 9 and well pipe 10, limiting plate 6141 is the L type and is located well pipe 10's right angle department, makes limiting plate 6141 can contact well two faces of pipe 10, further guarantees limiting plate 6141's spacing effect.

The contact surface of the limiting plate 6141 and the outer pipe 9 is a smooth surface, so that the friction between the limiting plate 6141 and the outer pipe 9 is reduced, and the lifting between the lifting pipes is more reliable.

The slots 613 are provided with a plurality of slots 613, so that the locking structure 61 and the middle pipe 10 are more reliably fixed, and the slots 613 are uniformly distributed in the circumferential direction of the locking structure 61, so that the stress of the locking structure 61 is more uniform. In this embodiment, there are 4 slots 613, which are respectively located at four corners of the locking structure 61.

The locking structure 61 comprises a first locking block 611 and a second locking block 612, the first locking block 611 and the second locking block 612 are locked to form a containing groove, and the second transmission nut 6 is located in the containing groove, so that the locking structure 61 is simple and convenient to process and install.

The accommodating groove is internally provided with a limiting hole 615, and the second transmission nut 6 is provided with a limiting bulge 62 matched with the limiting hole 615, so that the locking structure 61 and the second transmission nut 6 are fixed in position, can be synchronously lifted and can not rotate in the circumferential direction.

The limiting holes 615 and the limiting protrusions 62 are provided with a plurality of pairs, so that the locking structure 61 and the second transmission nut 6 are further ensured to be relatively fixed. In this embodiment, the limiting hole and the limiting protrusion are provided with 4 pairs, and are respectively located on four side surfaces of the locking structure.

It is understood that the slots may be provided with 1, 2, etc.

It can be understood that a limiting protrusion can be arranged in the accommodating groove, and a limiting hole matched with the limiting protrusion is formed in the second transmission nut.

It is understood that the limiting hole and the limiting protrusion may be provided with 1 pair, 2 pairs, 3 pairs, etc.

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, including the fall way, locate the bottom plate of fall way lower extreme and be located the transmission assembly of fall way, the fall way includes the inner tube, the transmission assembly is including fixing the drive screw on the bottom plate, but the cavity mandrel that stretches out and draws back relatively with drive screw axial and the stand pipe that can stretch out and draw back relatively with cavity mandrel axial, the stand pipe is located the inner tube, the lower extreme of inner tube is connected with the first drive nut with cavity mandrel screw-thread fit, the lower extreme of cavity mandrel is connected with the second drive nut with drive screw thread fit, the outside of second drive nut is equipped with the rotatory locking structure of restriction second drive nut, a serial communication port, the fall way is two-section formula fall way, the fall way still includes the outer tube, the locking structure is located the outer tube and with outer tube clearance fit.

2. The lifting column according to claim 1, wherein the locking structure has a slot on a sidewall thereof, and a detachable insert block is disposed in the slot, and the insert block is in a detached state.

3. The lifting column according to claim 2, wherein the number of the slots is plural, and the plural slots are uniformly distributed in the circumferential direction of the locking structure.

4. The lifting column of claim 1, wherein the maximum reach of the drive assembly is less than the height of the outer tube.

5. The lifting column according to claim 1, wherein the locking structure comprises a first locking block and a second locking block, the first locking block and the second locking block are locked to form a containing groove, and the second transmission nut is located in the containing groove.

6. The lifting column according to claim 5, wherein a limiting hole is provided in the accommodating groove, and a limiting protrusion engaged with the limiting hole is provided on the second transmission nut; or, a limiting bulge is arranged in the accommodating groove, and a limiting hole matched with the limiting bulge is formed in the second transmission nut.

7. The utility model provides a lifting column, including the fall way, locate the bottom plate of fall way lower extreme and be located the transmission assembly of fall way, the fall way includes the inner tube, the transmission assembly is including fixing the drive screw on the bottom plate, but the cavity mandrel that stretches out and draws back relatively with drive screw axial and the stand pipe that can stretch out and draw back relatively with cavity mandrel axial, the stand pipe is located the inner tube, the lower extreme of inner tube is connected with the first transmission nut with cavity mandrel screw-thread fit, the lower extreme of cavity mandrel is connected with the second transmission nut with drive screw thread fit, the outside of second transmission nut is equipped with the rotatory locking structure of restriction second transmission nut, a serial communication port, the fall way is three-section formula fall way, the fall way still includes well pipe and outer tube, locking structure and well pipe fixed connection.

8. The lifting column as claimed in claim 7, wherein the locking structure has a slot on a sidewall thereof, a detachable insert block is disposed in the slot, and a hole is disposed on a sidewall of the middle tube, the insert block passing through the hole and engaging with the slot to fix the locking structure and the middle tube relatively in the axial direction.

9. The lifting column according to claim 8, wherein a limiting plate is arranged at one end of the insertion block close to the outer tube, and the limiting plate is positioned between the middle tube and the outer tube.

10. The lifting column according to claim 9, wherein the outer tube and the middle tube are square tubes, and the limiting plate is L-shaped and is located at a right angle of the middle tube.

11. The lifting column according to claim 9, wherein the contact surface of the limiting plate and the outer tube is a smooth surface.

12. The lifting column according to claim 7, wherein the maximum extension distance between the drive screw and the hollow mandrel is less than the height of the outer tube, and the maximum extension distance between the hollow mandrel and the guide tube is less than the height of the middle tube.