CN219629059U

CN219629059U - Lifting upright post

Info

Publication number: CN219629059U
Application number: CN202320626182.8U
Authority: CN
Inventors: 项乐宏; 蒋领辉; 陈旭峰
Original assignee: Loctek Ergonomic Technology Co Ltd
Current assignee: Loctek Ergonomic Technology Co Ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-09-05
Anticipated expiration: 2033-03-27

Abstract

The utility model discloses a lifting upright post, which comprises a driving assembly, a telescopic pipe and a linear driving mechanism connected in the telescopic pipe, wherein the linear driving mechanism comprises a supporting pipe and a transmission shaft; the first limiting block and the second limiting block are connected to the supporting tube and can synchronously move along with the supporting tube; the fixed block is connected to the inner wall of the inner tube of the telescopic tube and is positioned between the first limiting block and the second limiting block; the first travel switch and the second travel switch are respectively connected to the fixed block and are respectively and electrically connected with the driving component. The lifting upright post is simple in structure, convenient to install and high in stroke control precision.

Description

Lifting upright post

Technical Field

The utility model relates to the technical field of electric lifting furniture, in particular to a lifting upright post.

Background

The lifting stand column is a furniture component for converting the rotary motion of a motor into linear motion, and structurally comprises a driving motor, a telescopic tube and a linear driving mechanism, wherein the linear driving mechanism is generally a screw-nut pair, is connected in the telescopic tube and is in transmission connection with the driving motor, and the driving motor acts to drive the linear driving mechanism to stretch or shrink the telescopic tube so as to enable the lifting stand column to lift; the lifting upright post is widely applied to electric lifting furniture such as electric lifting tables, electric lifting beds, lifting platforms and the like.

The lifting upright post of the related art generally needs to control the action of the driving motor by means of additional control hardware and software to realize the lifting adjustment of the lifting upright post, wherein the additional control hardware and software generally refer to a control panel, and a circuit and a software program positioned in the control panel; under the condition that software program goes wrong, in order to avoid lifting regulation uncontrollable of the lifting upright post, people install an upper position travel switch and a lower position travel switch in the lifting upright post, the upper position travel switch and the lower position travel switch are respectively connected with a control circuit of a driving motor, and when a switch contact in threaded connection on a screw rod of the lifting upright post is propped against the upper position travel switch or the lower position travel switch, the upper position travel switch or the lower position travel switch is triggered, so that the control circuit of the driving motor is disconnected, and the lifting operation safety of the lifting upright post is improved. The lifting upright post of the related art, and the upper position travel switch and the lower position travel switch are generally arranged in an installation box, the installation box is connected to the upper part of a screw rod of the lifting upright post, and a switch contact is in threaded connection with a threaded section on the upper part of the screw rod, such as the installation structure of the upper position travel switch and the lower position travel switch disclosed in Chinese patent application with publication number of CN 216568888U; and the other is that an upper travel switch or a lower travel switch is arranged on the inner wall of a supporting tube of the linear driving mechanism, and a switch contact is in threaded connection with the middle part of the screw rod.

The lifting upright post of the related art has the following defects in the actual assembly and use process: firstly, more parts are required to be assembled through a component controlled by a travel switch, such as installation of an installation box, arrangement of a threaded section on the upper part of a screw rod, threaded connection of a switch contact and the threaded section, a circumferential rotation limiting structure of the switch contact and the like, and the installation structure is complex; secondly, the switch contact is in threaded connection with the threaded section or the screw rod, and when the screw rod rotates, the switch contact is driven to axially move along the screw rod, and due to the fact that a movable clearance is matched with the screw rod, an error exists between the switch contact and the preset distance compared with the actual distance of the travel switch, and the travel control precision is poor; furthermore, the stroke of the lifting column of the related art is not freely adjustable within the allowable range.

Disclosure of Invention

The utility model aims to overcome the defects of the related art and provide the lifting stand column which is simple in structure, convenient to install and high in stroke control precision.

The technical scheme of the utility model is that a lifting upright post with the following structure is provided: it comprises

The linear driving mechanism comprises a supporting tube connected with the outer tube of the telescopic tube and a transmission shaft in threaded connection with the supporting tube, and the driving assembly is in transmission connection with the transmission shaft and is used for enabling the supporting tube to axially move and enabling the telescopic tube to stretch;

two limiting blocks: the first limiting block and the second limiting block are sequentially connected to the outer side wall of the support tube along the length direction of the support tube and can synchronously move along with the support tube;

the fixed block is connected to the inner wall of the inner tube of the telescopic tube and is positioned between the first limiting block and the second limiting block;

two travel switches: the first travel switch and the second travel switch are respectively connected to the fixed block and are respectively and electrically connected with the driving component;

when the support pipe moves to the first limit block to touch the first travel switch, the first travel switch controls the driving assembly to stop working, and the telescopic pipe stops shrinking; when the support tube moves to the second limit block to touch the second travel switch, the second travel switch controls the driving assembly to stop working, and the telescopic tube stops stretching.

In some embodiments, the first limiting block and the second limiting block are respectively sleeved on the outer side wall of the supporting tube in a sliding manner, and locking screws connected with the supporting tube are connected to the first limiting block and the second limiting block.

In some embodiments, the fixing block is provided with a central hole, the central hole is sleeved on the supporting tube, and the inner wall of the central hole is in sliding fit with the outer side wall of the supporting tube.

In some embodiments, a plurality of axially extending and outwardly protruding ribs are distributed on the inner wall of the central hole along the circumferential direction, and the bottoms of the ribs are in sliding fit with the outer side wall of the support tube.

In some embodiments, the outer end of the fixed block is provided with a limit bump protruding outwards in the radial direction, and when the fixed block is inserted into the inner tube of the telescopic tube, the limit bump is propped against the outer end of the inner tube.

In some embodiments, the outer sidewall of the inner tube is circumferentially connected with a plurality of slides, and at least one slide is connected with a fixed block within the inner tube.

In some embodiments, a chute extending along the axial direction of the fixed block is arranged on the inner side wall of the fixed block, a substrate is connected in the chute, and the first travel switch and the second travel switch are sequentially connected on the substrate.

In some embodiments, the first limiting block and the second limiting block are respectively provided with a touch block which is respectively contacted with the first travel switch and the second travel switch, and the touch blocks are respectively positioned on one side of the support tube close to the travel switch.

In some embodiments, the driving assembly is disposed on a top end surface of the telescopic tube, and a bottom of the driving assembly is fixedly connected with an upper end surface of an inner tube of the telescopic tube.

In some embodiments, the driving assembly is disposed at one side of the top of the telescopic tube, and the driving assembly is fixedly connected with the upper end of the inner tube of the telescopic tube through a bracket.

After the structure is adopted, compared with the related art, the lifting upright post has the following advantages:

the lifting upright post is connected with a first limiting block and a second limiting block on the outer side wall of a supporting tube of the linear driving mechanism, and the first limiting block and the second limiting block can synchronously move along the axial direction along with the supporting tube; the inner wall of the inner tube of the telescopic tube is connected with a fixed block, and the fixed block is provided with a first travel switch and a second travel switch; when the lifting upright post is assembled, the fixed block provided with the first travel switch and the second travel switch is arranged on the inner wall of the inner pipe of the telescopic pipe, then the first limiting block and the second limiting block are respectively connected to the supporting pipe, and the fixed block is positioned between the two limiting blocks, so that the installation of the lifting upright post travel switch control assembly is completed, the installation structure is simple, and the assembly is convenient; and the distance accuracy between the two travel switches and the two limiting blocks on the supporting tube is high, so that the travel control accuracy of the lifting upright post is high.

Drawings

Fig. 1 is a schematic structural view of a lifting column according to some embodiments of the present utility model.

Fig. 2 is a schematic diagram of an assembled structure of a lifting column according to some embodiments of the utility model.

Fig. 3 is a schematic cross-sectional view of a lifting column according to some embodiments of the utility model.

Fig. 4 is a schematic structural view of a linear driving mechanism of a lifting column according to some embodiments of the present utility model.

Fig. 5 is a schematic structural view of a fixing block of a lifting column according to some embodiments of the present utility model.

Fig. 6 is a schematic view of another angle of a fixed block of a lifting column according to some embodiments of the present utility model.

Fig. 7 is a schematic structural view of a lifting column according to other embodiments of the present utility model.

Reference numerals illustrate:

1. a driving component, 2, a telescopic pipe, 200, an outer pipe, 201, an inner pipe, 202, a sliding piece, 203, a convex column, 204, a first mounting hole, 3, a linear driving mechanism, 300, a supporting pipe, 301, a transmission shaft, 4, a first limiting block, 400 and a second limiting block, 401, locking screws, 402, contact blocks, 5, fixed blocks, 500, a central hole, 501, ribs, 502, a chute, 503, a second mounting hole, 504, a limit bump, 6, a first travel switch, 600, a second travel switch, 601, a substrate, 7 and a bracket.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the specific examples.

Referring to fig. 1 to 6, the embodiment of the utility model discloses a lifting column which can be used for a table leg of an electric lifting table, a lifting column of an electric lifting platform and the like, and structurally comprises a driving assembly 1, a telescopic pipe 2 and a linear driving mechanism 3 connected in the telescopic pipe 2, wherein the linear driving mechanism 3 comprises a supporting pipe 300 connected with an outer pipe 200 of the telescopic pipe 2 and a transmission shaft 301 in threaded connection with the supporting pipe 300, and the transmission shaft 301 is a screw rod or a wire pipe with threads on the surface and the like; the driving assembly 1 comprises a driving motor and a mounting box for mounting the driving motor, the driving motor of the driving assembly 1 is in transmission connection with the transmission shaft 301 and is used for driving the transmission shaft 301 to rotate, so that the support tube 300 in threaded connection with the transmission shaft 301 can move along the axial direction and drive the telescopic tube 2 to perform telescopic action.

In the embodiment, the telescopic tube 2 is two-section tube, namely an outer tube 200 and an inner tube 201, the driving assembly 1 is arranged on the top end surface of the telescopic tube 2, and the bottom of the driving assembly 1 is fixedly connected with the upper end surface of the inner tube 201 of the telescopic tube 2; the outer tube 200 is axially moved in a telescopic manner relative to the inner tube 201 under the drive of the drive assembly 1, and the inner tube 201 is fixed in position relative to the drive assembly 1.

Referring to fig. 2, 3 and 4 again, in some embodiments, the lifting upright further includes a fixed block 5, two limiting blocks and two travel switches, where the two limiting blocks include a first limiting block 4 and a second limiting block 400, and the first limiting block 4 and the second limiting block 400 are sequentially connected to an outer sidewall of the support tube 300 along a length direction of the support tube 300 and can move synchronously with the support tube 300; the fixed block 5 is connected to the inner wall of the inner tube 201 of the telescopic tube 2 and is positioned between the first limiting block 4 and the second limiting block 400; the two travel switches comprise a first travel switch 6 and a second travel switch 600, and the first travel switch 6 and the second travel switch 600 are respectively connected to the fixed block 5 and are respectively and electrically connected with the driving assembly 1 through wires.

In this embodiment, when the driving assembly 1 drives the transmission shaft 301 to rotate, so that the support tube 300 moves along the axial direction, and when the support tube 300 moves along the first direction until the first limit block 4 touches the first travel switch 6, the first travel switch 6 controls the driving assembly 1 to stop working, and the telescopic tube 2 stops shrinking; when the support tube 300 moves along the second direction until the second limiting block 400 touches the second travel switch 600, the second travel switch 600 controls the driving assembly 1 to stop working, and the telescopic tube 2 stops stretching. The first direction is opposite to the second direction, and the first direction is the contraction direction of the telescopic pipe 2 or the descending direction of the lifting upright post; the second direction is the extension direction of the telescopic tube 2, or the lifting direction of the lifting column. The first travel switch 6 and the second travel switch 600 are micro switches, and the two limiting blocks are respectively contacted with the switches of the two travel switches to trigger the travel switches to act.

In this embodiment, the first limiting block 4 and the second limiting block 400 are provided with a contact block 402 that touches the first travel switch 6 and the second travel switch 600 respectively, and the contact blocks 402 are located on one side of the support tube 300 close to the travel switch. The arrangement further improves the convenience of the installation of the limiting block, and the whole structure is more compact.

Referring to fig. 5 and 6, in the present embodiment, the first travel switch 6 and the second travel switch 600 are sequentially connected to the base plate 601 along the axial direction of the fixed block 5, and the inner side wall of the fixed block 5 is provided with the sliding groove 502 extending along the axial direction of the fixed block 5, the base plate 601 is connected in the sliding groove 502, and when the first travel switch 6 and the second travel switch 600 are installed, only the base plate 601 connected with the first travel switch 6 and the second travel switch 600 needs to be connected with the sliding groove 502 of the fixed block 5, so that the installation is simple and convenient.

In this embodiment, when the lifting column is assembled, the fixed block 5 provided with the first travel switch 6 and the second travel switch 600 is installed on the inner wall of the inner tube 201 of the telescopic tube 2, then the first limiting block 4 and the second limiting block 400 are respectively connected to the supporting tube 300, and the fixed block 5 is located between the two limiting blocks, so that the installation of the lifting column travel switch control assembly is completed, and the installation structure is simple and the assembly is convenient; and the accuracy of the distance between the two travel switches and the two limiting blocks on the supporting tube 300 is high, so that the travel control accuracy of the lifting upright post is high.

Referring again to fig. 4, in some embodiments, the first stopper 4 and the second stopper 400 are respectively slidably sleeved on the outer side wall of the support tube 300, and a locking screw 401 connected to the support tube 300 is connected to each of the first stopper 4 and the second stopper 400. During installation, the first limiting block 4 and the second limiting block 400 are respectively sleeved on the outer side wall of the supporting tube 300, then the distance and the position between the first limiting block 4 and the second limiting block 400 are adjusted, and the first limiting block 4 and the second limiting block 400 are fixed on the supporting tube 300 by locking screws 401. The position of the two limiting blocks on the supporting tube 300 can be adjusted by loosening the locking screw 401 and sliding the limiting blocks, and after the position of the limiting blocks is adjusted, the limiting blocks are locked by the locking screw 401, so that the stroke of the lifting upright post in the allowable range can be adjusted at will, and the requirements of users on lifting upright posts with different strokes are met.

Referring to fig. 2, 3, 5 and 6, the fixing block 5 has a central hole 500, the central hole 500 is sleeved on the support tube 300, and the inner wall of the central hole 500 is slidably engaged with the outer sidewall of the support tube 300. When the fixed block 5 is installed, the fixed block 5 is sleeved on the supporting pipe 300, and the fixed block 5 is connected with the inner pipe 201 of the telescopic pipe 2; that is, the outer side wall of the fixed block 5 is connected with the inner wall of the inner pipe 201, and the inner wall of the central hole 500 of the fixed block 5 is slidably connected with the outer side wall of the support pipe 300, so that the fixed block 5 is positioned between the support pipe 300 and the inner pipe 201, not only plays a supporting role, but also can effectively prevent the support pipe 300 from shaking transversely, and plays a limiting role on the support pipe 300; the fixing block 5 also avoids the support member or the support seat between the support tube 300 and the inner tube 201, so that the lifting column has a simple structure and is convenient to assemble. In addition, the fixed block 5 is located between the first limiting block 4 and the second limiting block 400, and plays a role in axially limiting the movement of the first limiting block 4 and the second limiting block 400; it will be appreciated that when the first travel switch 6 or the second travel switch 600 fails, the fixed block 5 plays a limiting role on the axial movement of the support tube 300, and improves the lifting safety of the lifting column.

Referring to fig. 5 and 6, in some embodiments, in order to reduce the contact area between the inner wall of the central hole 500 of the fixing block 5 and the outer side wall of the support tube 300, reduce the resistance to movement of the support tube 300, avoid noise, a plurality of axially extending and outwardly protruding ribs 501 are circumferentially distributed on the inner wall of the central hole 500, and the bottoms of the ribs 501 are slidably attached to the outer side wall of the support tube 300.

In this embodiment, in order to further improve the convenience of installing the fixing block 5, a radially protruding limit bump 504 is provided at the outer end of the fixing block 5, and when the fixing block 5 is inserted into the inner tube 201 of the telescopic tube 2, the limit bump 504 abuts against the outer end of the inner tube 201. The setting of the limit bump 504 makes the installation of the fixed block 5 more convenient and faster.

As shown in fig. 2 and 5, in order to make the sliding between the inner tube 201 and the outer tube 200 smoother while avoiding a backlash when the outer tube and the inner tube of the telescopic tube 2 move relatively, a plurality of sliding pieces 202 are connected to the outer wall of the inner tube 201 in the circumferential direction.

In some embodiments, to further improve the ease of installation of the fixing block 5, the installation structure of the fixing block 5 is simplified, and at least one sliding piece 202 on the inner tube 201 is connected with the fixing block 5 inside the inner tube 201. Specifically, a first mounting hole 204 is formed around the pipe wall of the inner pipe 201, a protruding column 203 capable of being connected in the first mounting hole 204 is formed on the sliding plate 202, and a second mounting hole 503 corresponding to the first mounting hole 204 is formed on at least one side wall of the fixed block 5; when the fixed block 5 is inserted into the inner pipe 201, the second mounting hole 503 is aligned with the first mounting hole 204, and when the boss 203 of the sliding plate 202 is inserted into the first mounting hole 204, the boss is also inserted into the second mounting hole 503, so that the axial direction of the fixed block 5 is limited; in addition, the outer end limiting projection 504 of the fixed block 5 is in limiting fit with the outer end of the inner tube 201, so that the fixed block 5 is firmly installed in the inner tube 201, the whole installation process of the fixed block 5 is simple and convenient to install without using screws, and only the protruding column 203 on the sliding plate 202 is required to be inserted into the second installation hole 503 on the fixed block 5.

Referring to fig. 7, in some embodiments, the drive assembly 1 is disposed on one side of the top of the bellows 2, and the drive assembly 1 is fixedly coupled to the upper end of the inner tube 201 of the bellows 2 by a bracket 7. In this embodiment, the driving assembly 1 is installed in such a way that the lifting column is suitable for a single motor driven electric lifting table, i.e. the electric lifting table adopts one motor to drive two lifting columns to lift. Other technical means of the present embodiment are the same as any of the above embodiments, and the present embodiment is not repeatedly described.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A lifting column, characterized in that: it comprises

2. A lifting column according to claim 1, wherein: the first limiting block and the second limiting block are respectively sleeved on the outer side wall of the supporting tube in a sliding mode, and locking screws connected with the supporting tube are connected to the first limiting block and the second limiting block.

3. A lifting column according to claim 1, wherein: the fixed block is provided with a central hole, the central hole is sleeved on the supporting tube, and the inner wall of the central hole is in sliding fit with the outer side wall of the supporting tube.

4. A lifting column according to claim 3, wherein: the inner wall of the central hole is circumferentially provided with a plurality of convex ribs which extend axially and are outwards protruded, and the bottoms of the convex ribs are in sliding fit with the outer side wall of the supporting tube.

5. A lifting column according to claim 3, wherein: the outer end of the fixed block is provided with a limiting lug protruding outwards in the radial direction, and when the fixed block is inserted into the inner tube of the telescopic tube, the limiting lug abuts against the outer end of the inner tube.

6. The lifting column of claim 5, wherein: the outer side wall of the inner tube is circumferentially connected with a plurality of sliding sheets, and at least one sliding sheet is connected with a fixed block in the inner tube.

7. A lifting column according to claim 3, wherein: the inner side wall of the fixed block is provided with a chute extending along the axial direction of the fixed block, a base plate is connected in the chute, and the first travel switch and the second travel switch are sequentially connected to the base plate.

8. The lifting column of claim 7, wherein: the first limiting block and the second limiting block are respectively provided with a contact block which is contacted with the first travel switch and the second travel switch, and the contact blocks are positioned on one side of the supporting tube, which is close to the travel switch.

9. A lifting column according to claim 1, wherein: the driving assembly is arranged on the top end face of the telescopic pipe, and the bottom of the driving assembly is fixedly connected with the upper end face of the inner pipe of the telescopic pipe.

10. A lifting column according to claim 1, wherein: the driving assembly is arranged on one side of the top of the telescopic pipe and fixedly connected with the upper end of the inner pipe of the telescopic pipe through the support.