Electric lifting column with release function

Abstract

The application discloses a kind of electric lifting columns with release function, including first cover plate, with the first cover plate fixed connection inner tube, second cover plate, with second cover plate fixed connection outer tube, and drive inner tube and outer tube relative telescopic drive mechanism, drive mechanism includes: screw rod assembly, including screw rod and nut with screw rod screw connection, nut is connected with second cover plate;Motor assembly, it can be transmission connection with screw rod assembly, to drive screw rod rotation;Buffer component, it connects first cover plate and second cover plate;Release mechanism, it is used to connect or separate screw rod assembly and motor assembly;When screw rod assembly and motor assembly are separated, lifting column is in release state, inner tube and outer tube are telescopic under the driving of the buffer component.The electric lifting column provided by the application can realize rapid lifting without power.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lifting equipment, in particular to an electric lifting column with release function. BACKGROUND

[0002] Lifting columns are applied to various products that need to be lifted, such as lifting components of lifting tables. In order to facilitate height adjustment, electric lifting columns are commonly used in the prior art. A lifting column generally comprises a motor, a lead screw, a lead screw nut, and a sleeve. The lifting column is lifted by rotating the lead screw driven by the motor. The entire lifting operation is powered by the motor, and the lifting is automatic.

[0003] However, when there is no power supply, the lifting column cannot be lifted. Or when rapid lifting is required, the motor drive cannot meet the demand.

[0004] To solve the above problems, the present application is therefore provided. SUMMARY

[0005] The present application aims to provide an electric lifting column with release function, which can be lifted without power supply.

[0006] Based on the above problems, the technical solution provided by the present application is as follows:

[0007] An electric lifting column with release function, comprising a first cover plate, an inner tube fixedly connected with the first cover plate, a second cover plate, an outer tube fixedly connected with the second cover plate, and a driving mechanism for driving the inner tube and the outer tube to extend and retract relative to each other, the driving mechanism comprising:

[0008] A lead screw assembly comprising a lead screw and a nut threadedly connected with the lead screw, the nut being connected with the second cover plate;

[0009] A motor assembly which can be drivingly connected with the lead screw assembly to drive the lead screw to rotate;

[0010] A buffer component connecting the first cover plate and the second cover plate;

[0011] A release mechanism for connecting or disconnecting the lead screw assembly and the motor assembly;

[0012] When the lead screw assembly and the motor assembly are disconnected, the lifting column is in a release state, and the inner tube and the outer tube extend and retract relative to each other under the driving of the buffer component.

[0013] In some embodiments, the release mechanism comprises a connecting rod fixed on the lead screw, a release rod elastically supported in the connecting rod, a bracket rotatably arranged on the outer periphery of the connecting rod, a locking assembly arranged between the connecting rod and the bracket, and a first transmission member fixed with the bracket, the first transmission member being in transmission connection with the motor assembly, and the release rod being provided with an avoiding groove on the outer wall thereof for partially accommodating the locking assembly.

[0014] When the release rod is pressed to move close to the lead screw, the locking assembly is accommodated into the avoiding groove, and the connecting rod is separated from the bracket.

[0015] When the pressing force on the release rod is released so that the release rod moves away from the lead screw, the release rod resets to push the locking assembly out of the connecting rod and abut against the bracket, and the connecting rod is combined with the bracket.

[0016] In some embodiments, the locking assembly comprises two steel balls arranged on the two sides of the connecting rod in the radial direction, and the inner ring of the bracket is provided with two limiting grooves matched with the two steel balls.

[0017] In some embodiments, the motor assembly is in transmission connection with the first transmission member through a second transmission member.

[0018] In some embodiments, the first transmission member and the second transmission member are bevel gears, the motor assembly comprises a motor and a worm arranged on the power output end of the motor, and the second transmission member is in transmission connection with the worm.

[0019] The driving mechanism further comprises a gear box fixed on the first cover plate, the first transmission member, the second transmission member and the worm are arranged in the gear box, the connecting rod is rotatably supported in the gear box through a bearing assembly, and the motor is mounted outside the gear box.

[0020] In some embodiments, the bracket is limited on the connecting rod through a snap spring assembly, the snap spring assembly comprises two snap springs located on the two sides of the bracket in the axial direction, and a plain bearing is arranged between each snap spring and the bracket.

[0021] In some embodiments, the bracket is provided with a plurality of connecting keys in the circumferential direction, and the inner ring of the first transmission member is provided with key grooves matched with the plurality of connecting keys.

[0022] In some embodiments, the release mechanism further comprises a handle abutting against the release rod, and the handle is hinged on the first cover plate.

[0023] In some embodiments, the buffer component is a gas spring.

[0024] In some embodiments, the lead screw assembly further comprises a support tube, one end of the support tube is fixedly connected with the nut, and the other end of the support tube is fixedly connected with the second cover plate, and the lead screw can extend into the support tube.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] 1. The release mechanism is arranged to connect or separate the lead screw assembly and the motor assembly, when there is no power supply or when rapid lifting is required, the lead screw assembly and the motor assembly can be separated through the release mechanism, the spacing between the first cover plate and the second cover plate is adjusted, that is, the inner tube and the outer tube are relatively extended and retracted, and rapid lifting is realized.

[0027] 2. The release mechanism has a simple structure and can be operated by pressing the release rod through the handle, and is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows, and the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0029] Figure 1 The structure schematic diagram of the embodiment of the present application is shown.

[0030] Figure 2 The cross-sectional structure schematic diagram of the embodiment of the present application is shown.

[0031] Figure 3 The cross-sectional structure schematic diagram of the embodiment of the present application is shown. Figure 2 The partial enlarged view of I in the embodiment of the present application is shown.

[0032] Figure 4 The partial structure schematic diagram of the embodiment of the present application is shown.

[0033] Figure 5 The transmission relationship schematic diagram of the motor assembly and the lead screw assembly in the embodiment of the present application is shown.

[0034] Figure 6 The installation relationship diagram of the lead screw assembly and the release mechanism in the embodiment of the present application is shown.

[0035] Figure 7 The cross-sectional schematic diagram of the embodiment of the present application is shown. Figure 6

[0036] Figure 8 The structure schematic diagram of the release mechanism in the embodiment of the present application is shown.

[0037] Figure 9 ​It is a structure schematic view of the support in the embodiment of the present application.

[0038] Figure 10 It is a structure schematic view of the connecting rod in the embodiment of the present application.

[0039] Figure 11 It is a sectional structure schematic view of the connecting rod in the embodiment of the present application.

[0040] Among them:

[0041] 1, first cover plate; 1-1, installation through slot; 2, inner tube; 3, second cover plate; 4, outer tube; 5, screw rod; 6, nut; 7, connecting rod; 7-1, circlip groove; 8, release rod; 8-1, avoiding groove; 9, support; 9-1, limiting groove; 9-2, connecting key; 10, first transmission member; 11, second transmission member; 12, worm; 13, motor; 14, buffer component; 15, bearing; 16, circlip; 17, plain bearing; 18, locking assembly; 19, support tube; 20, connecting seat; 21, handle; 22, middle tube; 23, gear box; 24, spring. DETAILED DESCRIPTION

[0042] The above scheme will be further described in combination with specific embodiments. It should be understood that these embodiments are used to illustrate the present application and do not limit the scope of the present application. The implementation conditions used in the embodiments can be further adjusted according to the specific conditions of the manufacturer, and the implementation conditions not mentioned are usually the conditions in the conventional experiments.

[0043] Reference Figures 1 to 4 It is a structure schematic view of the embodiment of the present application, and provides an electric lifting column with a release function, which comprises a first cover plate 1, an inner tube 2 fixedly connected with the first cover plate 1, a second cover plate 3, an outer tube 4 fixedly connected with the second cover plate 3, and a driving mechanism for driving the inner tube 2 and the outer tube 4 to relatively stretch and contract.

[0044] The driving mechanism comprises a screw rod assembly and a motor assembly. The screw rod assembly comprises a screw rod 5 and a nut 6 threadedly connected with the screw rod 5, and the nut 6 is connected with the second cover plate 3. The motor assembly can be drivingly connected with the screw rod assembly to drive the screw rod 5 to rotate, thereby driving the nut 6 to move axially along the screw rod 5, and further driving the inner tube 2 and the outer tube 4 to relatively stretch and contract.

[0045] When there is no power supply or need to quickly lift, in order to achieve the normal lifting of the lifting column, the driving mechanism further comprises a buffer component 14 and a release mechanism, the buffer component 14 is connected between the first cover plate 1 and the second cover plate 3, preferably, the buffer component 14 can adopt a gas spring. The release mechanism can connect or separate the screw rod assembly and the motor assembly, when the screw rod assembly is connected with the motor assembly, the lifting column is in a self-locking state, at this time, the resistance between the motor assembly and the screw rod assembly, between the screw rod 5 and the nut 6, and between the inner tube 2 and the outer tube 4 is greater than the thrust of the buffer component 14, that is, the positions of the inner tube 2 and the outer tube 4 are relatively fixed; when the screw rod assembly is separated from the motor assembly, the lifting column is in a release state, at this time, the resistance between the screw rod 5 and the nut 6, and between the inner tube 2 and the outer tube 4 is less than the thrust of the buffer component 14, and the inner tube 2 and the outer tube 4 can be relatively telescopic under the driving of the buffer component 14.

[0046] As shown in Figures 6 to 11 , the release mechanism comprises a connecting rod 7 fixed on the screw rod 5, a release rod 8 elastically supported in the connecting rod 7, a support 9 rotatably arranged on the outer periphery of the connecting rod 7, a locking assembly 18 arranged between the connecting rod 7 and the support 9, and a first transmission member 10 fixedly connected with the support 9, the first transmission member 10 is in transmission connection with the motor assembly, and an avoiding groove 8-1 is arranged on the outer wall of the release rod 8 for part of the locking assembly 18 to be arranged therein.

[0047] Among them, the connecting rod 7 is fixed on one end of the screw rod 5 close to the first cover plate 1 and arranged coaxially with the screw rod 5, and the release rod 8 is supported in the connecting rod 7 by the spring 24. The locking assembly 18 comprises two steel balls arranged on the two sides of the connecting rod 7 in the radial direction, and two limiting grooves 9-1 matched with the two steel balls are arranged in the inner ring of the support 9, preferably, the limiting grooves 9-1 are circular arc grooves.

[0048] When the release rod 8 is pressed and moves close to the screw rod 5, the locking assembly 18 is accommodated into the avoiding groove 8-1, the connecting rod 7 is separated from the support 9, that is, the motor assembly is separated from the screw rod assembly, the resistance between the motor assembly and the screw rod assembly is removed, and the inner tube 2 and the outer tube 4 can be relatively telescopic under the driving of the buffer component 14. When the pressing force on the release rod 8 is removed, the release rod 8 moves away from the screw rod 5 under the action of the spring 24, the release rod 8 resets the locking assembly 18 to be ejected from the connecting rod 7 and abutted with the support 9, that is, the two steel balls are moved into the limiting grooves 9-1 respectively, at this time, the connecting rod 7 is combined with the support 9, the resistance between the screw rod assembly and the motor assembly, between the screw rod 5 and the nut 6, and between the inner tube 2 and the outer tube 4 is greater than the thrust of the buffer component 14, and the lifting column is self-locked.

[0049] As shown in Figure 5As shown, the motor assembly is in transmission connection with the first transmission member 10 and the second transmission member 11, and in this case, the first transmission member 10 and the second transmission member 11 are in the form of bevel gears. Correspondingly, the motor assembly comprises a motor 13 and a worm 12 arranged at the power output end of the motor 13, the second transmission member 11 is in transmission connection with the worm 12, and the worm 12 is driven to rotate by the motor 13, so as to drive the second transmission member 11 to rotate, and further drive the first transmission member 10 to rotate, thereby driving the lead screw 5 to rotate.

[0050] In order to facilitate the installation of the driving mechanism, the driving mechanism further comprises a gear box 23 fixed to the first cover plate 1, the first transmission member 10, the second transmission member 11 and the worm 12 are arranged in the gear box 23, the connecting rod 7 is rotatably supported in the gear box 23 through a bearing assembly, and the motor 13 is installed at the lower end of the gear box 23. Among them, the bearing assembly comprises two bearings 15 arranged at both ends of the connecting rod 7.

[0051] In order to facilitate the installation of the connecting rod 7 and the support 9, the support 9 is limited on the connecting rod 7 through a snap spring assembly, the snap spring assembly comprises two snap springs 16 arranged on both sides of the support 9 in the axial direction, and correspondingly, a snap spring groove 7-1 matched with the two snap springs 16 is arranged on the connecting rod 7, and a plain bearing 17 is arranged between each snap spring 7-1 and the support 9, so as to reduce the resistance of the rotation of the support 9.

[0052] In order to facilitate the installation and fixation between the first transmission member 10 and the support 9, a plurality of connecting keys 9-2 are arranged on the support 9 in the circumferential direction, and a key groove matched with the plurality of connecting keys 9-2 is arranged on the inner ring of the first transmission member 10, so as to realize the fixed connection between the first transmission member 10 and the support 9 through the cooperation of the connecting keys 9-2 and the key groove.

[0053] In order to facilitate the pressing operation of the release rod 8, the release mechanism further comprises a handle 21 abutting against the release rod 8, the handle 21 is hinged to the first cover plate 1 and extends outwardly of the first cover plate 1 to form an operation portion, an installation through slot 1-1 for installing the handle 21 is arranged on the first cover plate 1, and the handle 21 is pivotally connected in the installation through slot 1-1 and abuts against the release rod 8 at one end. By lifting the handle 21, the release rod 8 can be pressed, so that the motor assembly is separated from the lead screw assembly, and after the handle 21 is released, the release rod 8 is reset under the action of the spring 24, and the lead screw assembly and the motor assembly restore the transmission connection relationship.

[0054] In this case, in order to realize the connection between the nut 6 and the second cover plate 3, the lead screw assembly further comprises a support tube 19, the nut 6 is fixedly connected with one end of the support tube 19, the other end of the support tube 19 is fixedly connected with the second cover plate 3, and the lead screw 5 can extend into the support tube 19, wherein a connecting seat 20 is arranged at the end of the support tube 19, and the nut 6 is fixedly connected with the connecting seat 20 through a screw.

[0055] In order to improve the stability of the lifting column, the middle tube 22 is arranged between the inner tube 2 and the outer tube 4, and a plurality of friction plates (not shown) are arranged between the inner tube 2 and the middle tube 22 and between the middle tube 22 and the outer tube 4, respectively. The friction plate is a low-friction coefficient friction plate to reduce the force required for release.

[0056] The working principle of the present application is as follows:

[0057] When there is power supply, the motor 13 is turned on through the power control switch, the motor 13 drives the worm 12 to rotate, the worm 12 drives the second transmission member 11 to rotate, so as to drive the first transmission member 10, thereby driving the lead screw 5 to rotate, and the relative expansion and contraction between the inner tube 2 and the outer tube 4 is realized by the axial movement of the nut 6 along the lead screw 5; when there is no power supply or rapid lifting is required, the motor drive is not used at this time, the handle 21 is manually lifted, the release rod 8 is pressed by the handle, the release rod 8 compresses the spring 24, the locking assembly is partially accommodated in the avoiding groove 8-1 and separated from the support 9, at this time the connecting rod 7 is separated from the support 9, the resistance between the motor assembly and the lead screw assembly is removed, the lead screw 5 rotates, the inner tube 2 and the outer tube 4 relatively expand and contract under the driving of the buffer assembly, rapid lifting is realized, when reaching the appropriate position, the handle 21 is released, the release rod 8 is reset under the action of the spring 24, the locking assembly is ejected out of the connecting rod 7 and abuts against the support 9, at this time the connecting rod 7 is combined with the support 9, and the lead screw assembly is locked.

[0058] In summary, the electric lifting column can be lifted without power, is easy to operate, and improves the applicability.

[0059] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the personnel familiar with the technology to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An electric lifting column with a belt release function, comprising a first cover plate, an inner tube fixedly connected with the first cover plate, a second cover plate, an outer tube fixedly connected with the second cover plate, and a driving mechanism for driving the inner tube and the outer tube to extend and retract relative to each other, characterized in that, The driving mechanism comprises: a screw rod assembly comprising a screw rod and a nut threadedly connected with the screw rod, the nut being connected with the second cover plate; a motor assembly which is drivingly connected with the screw rod assembly to drive the screw rod to rotate; a buffering component connecting the first cover plate and the second cover plate; a releasing mechanism for connecting or disconnecting the screw rod assembly and the motor assembly; when the screw rod assembly is disconnected from the motor assembly, the lifting column is in a released state, and the inner tube and the outer tube are relatively telescopic under the driving of the buffering component; the releasing mechanism comprises a connecting rod fixed on the screw rod, a releasing rod elastically supported in the connecting rod, a bracket rotatably arranged on the outer periphery of the connecting rod, a locking assembly arranged between the connecting rod and the bracket, and a first transmission member fixed with the bracket, the first transmission member being drivingly connected with the motor assembly, and the releasing rod being provided with an avoiding groove on the outer wall thereof for partially accommodating the locking assembly; when the releasing rod is pressed to move close to the screw rod, the locking assembly is accommodated into the avoiding groove, and the connecting rod is disconnected from the bracket; when the pressing force on the releasing rod is released to move the releasing rod away from the screw rod, the releasing rod resets to eject the locking assembly out of the connecting rod and abut against the bracket, and the connecting rod is combined with the bracket.

2. The power lift column with release function of claim 1, wherein: the locking assembly comprises two steel balls arranged on the two sides of the connecting rod in the radial direction, and the inner ring of the bracket is provided with two limiting grooves matched with the two steel balls.

3. The power lift column with release function of claim 1, wherein: the motor assembly is drivingly connected with the first transmission member through a second transmission member.

4. The power lift column with release function of claim 3, wherein: the first transmission member and the second transmission member are bevel gears, the motor assembly comprises a motor and a worm arranged on the power output end of the motor, and the second transmission member is drivingly connected with the worm; the driving mechanism further comprises a gear box fixed on the first cover plate, the first transmission member, the second transmission member and the worm are arranged in the gear box, the connecting rod is rotatably supported in the gear box through a bearing assembly, and the motor is mounted outside the gear box.

5. The power lift column with release function of claim 1, wherein: the bracket is limited on the connecting rod through a snap spring assembly, the snap spring assembly comprises two snap springs located on the two sides of the bracket in the axial direction, and a plain bearing is arranged between each snap spring and the bracket.

6. The power lift column with release function of claim 1, wherein: the bracket is provided with a plurality of connecting keys in the circumferential direction, and the inner ring of the first transmission member is provided with key grooves matched with the plurality of connecting keys.

7. The power lift column with release function of claim 1, wherein: the releasing mechanism further comprises a handle abutting against the releasing rod, and the handle is hinged on the first cover plate.

8. The power lift column with release function of claim 1, wherein: the buffering component is a gas spring.

9. The power lift column with release function of claim 1, wherein: the screw rod assembly further comprises a support tube, one end of the support tube is fixedly connected with the nut, the other end of the support tube is fixedly connected with the second cover plate, and the screw rod can extend into the support tube.

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