CN218044218U - Lifting device - Google Patents

Abstract

The utility model provides a lifting device, include: a lifting frame; the first support piece and the second support piece are arranged on the bottom surface or the inner side of the lifting frame at intervals, the first support piece comprises a first support leg and a second support leg matched with the first support leg in a position-adjustable mode, the second support leg is connected with the lifting frame, the second support piece comprises a third support leg and a fourth support leg matched with the third support leg in a position-adjustable mode, and the fourth support leg is connected with the lifting frame; the driving mechanism comprises a motor component connected to the second supporting leg and a lead screw in driving fit with the motor component, and a nut component in driving fit with the lead screw is fixed on the first supporting leg; the stroke assembly comprises a mounting plate and an upper position switch and a lower position switch which are arranged on the mounting plate at intervals, the top end of the mounting plate is connected with the motor assembly, and the nut assembly is positioned between the upper position switch and the lower position switch. The technical scheme of this application has solved the lower problem of packaging efficiency of electric lift table among the correlation technique effectively.

Description

Lifting device

Technical Field

The utility model relates to an electric furniture technical field particularly, relates to a lifting device.

Background

The electric lifting table is an office table with adjustable height, and the height can be adjusted according to the height, sitting posture and standing posture of a person. The structure of the electric lifting table generally comprises a table plate, a cross beam, a base, a lifting upright post and a motor, wherein the motor is arranged outside the upright post, and the motor drives a rotating shaft to rotate so as to drive a lifting mechanism in the upright post to rotate, so that the upright post is lifted. The height adjustment of the electric lifting table is generally realized by controlling the action of a motor through a manual switch and a control box with software. Such lifting tables are relatively costly.

In order to reduce the cost, the related art also discloses a scheme for controlling the lifting adjustment of the lifting table by directly adopting a position switch, for example, the position switch is directly connected to the inner wall of the upright post, but the scheme needs additional tools and screws, and the installation is difficult, so that the assembly efficiency of the electric lifting table is low.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a lifting device to solve the lower problem of packaging efficiency of the electric lift table among the correlation technique.

In order to achieve the above object, the utility model provides a lifting device, include: a lifting frame; the first support piece and the second support piece are arranged on the bottom surface or the inner side of the lifting frame at intervals, the first support piece comprises a first support leg and a second support leg matched with the first support leg in a position-adjustable mode, the second support leg is connected with the lifting frame, the second support piece comprises a third support leg and a fourth support leg matched with the third support leg in a position-adjustable mode, and the fourth support leg is connected with the lifting frame; the driving mechanism comprises a motor component connected to the second supporting leg and a lead screw in driving fit with the motor component, and a nut component in driving fit with the lead screw is fixed on the first supporting leg; the stroke assembly comprises a mounting plate, an upper position switch and a lower position switch, the upper position switch and the lower position switch are arranged on the mounting plate at intervals, the top end of the mounting plate is connected with the motor assembly, the nut assembly is located between the upper position switch and the lower position switch, the lead screw rotates relative to the nut assembly to drive the second supporting leg and the fourth supporting leg to ascend and descend, and the nut assembly is provided with an upper limit position matched with the upper position switch in a triggering mode and a lower limit position matched with the lower position switch in a triggering mode.

Furthermore, the first supporting leg is a first inner tube, the second supporting leg is a first outer tube sleeved outside the first inner tube in a position-adjustable mode, the third supporting leg is a second inner tube, the fourth supporting leg is a second outer tube sleeved outside the second inner tube in a position-adjustable mode, and the mounting plate penetrates through the nut assembly and the first inner tube.

Further, the nut component comprises a nut and a frame arranged outside the nut in an enclosing mode, the frame is fixed in the first inner pipe, the mounting plate is located between the inner side of the frame and the outer side of the nut, the nut is provided with a trigger piece, and the trigger piece can be matched with the upper position switch and the lower position switch in a triggering mode.

Furthermore, the trigger piece comprises a first inclined plane part and a second inclined plane part which are connected with the outer wall surface of the nut, the bottom of the first inclined plane part protrudes out of the top of the first inclined plane part and is in trigger fit with the upper position switch, and the top of the second inclined plane part protrudes out of the bottom of the second inclined plane part and is in trigger fit with the lower position switch.

Furthermore, the nut assembly also comprises a connecting plate connected to the opening of the frame, and the connecting plate is provided with an avoidance hole for avoiding the mounting plate, and the avoidance hole is in guiding fit with the mounting plate; the mounting plate comprises a plate body and a guide convex rib arranged on the side wall of the plate body, and a guide groove matched with the guide convex rib in a guide way is arranged on the hole wall of the avoiding hole.

Further, the mounting panel includes the board body and sets up in the first connection piece on the top of board body, and first connection piece and the board body angulation setting, first connection piece pass through location structure and be connected with motor element's top.

Further, the mounting panel is still including setting up in the second connection piece of the bottom of board body, and the second connection piece becomes angle setting with the board body, and the bottom of lead screw has the spliced pole and the backstop portion of being connected with the spliced pole, and the diameter of spliced pole is less than the diameter of lead screw, and backstop portion protrusion is in the lateral wall of spliced pole, and the second connection piece cover is located outside the spliced pole and is cooperated with backstop portion.

Furthermore, the second connecting piece comprises a first sheet body connected with the bottom end of the plate body and a second sheet body which is superposed with the first sheet body and is connected with the first sheet body in a clamping manner, the first sheet body is sleeved on the outer side of the connecting column and is provided with a first notch for the connecting column to pass through, and the second sheet body is sleeved on the outer side of the connecting column and is provided with a second notch for the connecting column to pass through.

Further, first breach includes the first through-hole section with the first round hole section of spliced pole complex and makes the first round hole section and the first lamellar body outside intercommunication, the width of first through-hole section is less than the diameter of first round hole section, the second breach includes the second through-hole section with spliced pole complex second round hole section and makes second round hole section and the outside intercommunication of second lamellar body the second through-hole section, the width that the second through-hole section is less than the diameter of second round hole section, be provided with the card on the first lamellar body and go into the first card platform in the second through-hole section, be provided with the second card platform of card in the first through-hole section on the second lamellar body.

Further, the side wall surface of the first clamping table and the side wall surface of the first through section gradually expand from the inside of the first sheet body to the outside of the first sheet body, and the side wall surface of the second clamping table and the side wall surface of the second through section gradually expand from the inside of the second sheet body to the outside of the second sheet body.

Furthermore, the travel assembly also comprises a circuit board connected with the mounting plate, and the upper position switch and the lower position switch are both connected with the circuit board; the outer wall surface of the second connecting sheet is provided with a lug structure; the motor assembly comprises a fixed frame, a motor and a gear transmission structure, the fixed frame is connected with the first outer pipe, the motor and the gear transmission structure are both arranged on the fixed frame, the motor drives the screw rod to rotate through the gear transmission structure, and the first connecting piece is connected with the top of the fixed frame through the positioning structure; the lifting frame comprises a table plate and a cross beam arranged at the bottom of the table plate, the second supporting leg is connected with the cross beam, the fourth supporting leg is connected with the cross beam, and the fixing frame is connected with the cross beam; the lifting device further comprises a first base connected to the bottom of the first inner pipe and a second base connected to the bottom of the second inner pipe.

Use the technical scheme of the utility model, elevating gear includes: the lifting frame, the first supporting piece, the second supporting piece, the driving mechanism and the stroke assembly. The first supporting piece and the second supporting piece are arranged on the bottom surface or the inner side of the lifting frame at intervals. The first supporting piece comprises a first supporting leg and a second supporting leg matched with the first supporting leg in a position-adjustable mode, the second supporting leg is connected with the lifting frame, the second supporting piece comprises a third supporting leg and a fourth supporting leg matched with the third supporting leg in a position-adjustable mode, and the fourth supporting leg is connected with the lifting frame. The driving mechanism comprises a motor component connected to the second supporting leg and a lead screw in driving fit with the motor component. And a nut component in transmission fit with the lead screw is fixed on the first supporting leg. The stroke assembly comprises a mounting plate, and an upper position switch and a lower position switch which are arranged on the mounting plate at intervals. The top of mounting panel is connected with motor element, and nut component is located between position switch and the lower position switch. Wherein, motor element drive lead screw rotates, and the lead screw can rotate in order to drive second landing leg and fourth landing leg for nut component and go up and down, and the second landing leg goes up and down to drive the crane and carry out elevating movement to make nut component have with last position switch trigger complex upper limit position and trigger complex lower limit position with lower position switch. Like this, because upper position switch and lower position switch can be installed in advance and constitute one set of stroke subassembly on the mounting panel, can with the stroke subassembly direct assembly to motor element like this on, need not respectively with upper position switch and the first landing leg of lower position switch installation again for stroke subassembly simple to operate can improve elevating gear packaging efficiency. Therefore, the technical scheme of this application can solve the lower problem of packaging efficiency of electric lift table among the correlation technique.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of a lifting device according to the present invention after half of the lifting frame is removed;

FIG. 2 shows a schematic side view of a first support and drive mechanism of the lift device of FIG. 1;

FIG. 3 shows a schematic cross-sectional view of the first support and drive mechanism of the lift of FIG. 1;

FIG. 4 shows a schematic side view of the first leg and drive mechanism of the lift of FIG. 1;

FIG. 5 illustrates a perspective view of the drive mechanism, nut assembly and stroke assembly of the lift device of FIG. 1;

FIG. 6 shows an enlarged schematic view at A of the drive mechanism, nut assembly and stroke assembly of the elevator apparatus of FIG. 5;

FIG. 7 shows an enlarged schematic view at B of the drive mechanism, nut assembly and stroke assembly of the elevator apparatus of FIG. 5;

FIG. 8 shows an enlarged schematic view at C of the drive mechanism, nut assembly and stroke assembly of the elevator apparatus of FIG. 5;

FIG. 9 illustrates a perspective view of another angle of the drive mechanism, nut assembly and stroke assembly of the lift device of FIG. 1;

FIG. 10 is an exploded schematic view of a portion of the drive mechanism, nut assembly and stroke assembly of the lift device of FIG. 1;

FIG. 11 is an exploded view of another angular partial configuration of the drive mechanism, nut assembly and stroke assembly of the lift device of FIG. 1;

fig. 12 shows an exploded view of the drive mechanism and the second link of the stroke assembly of the lift device of fig. 11.

Wherein the figures include the following reference numerals:

10. a lifting frame; 20. a first support member; 21. a first inner tube; 22. a first outer tube; 30. a second support member; 31. a second inner tube; 32. a second outer tube; 40. a drive mechanism; 41. a motor assembly; 411. a fixed mount; 412. a motor; 413. a gear transmission structure; 42. a lead screw; 421. connecting columns; 422. a stopper portion; 50. a nut assembly; 51. a nut; 52. a frame; 53. a trigger; 531. a first inclined surface part; 532. a second inclined surface part; 54. a connecting plate; 55. avoiding holes; 551. a guide groove; 60. a stroke assembly; 61. mounting a plate; 611. a plate body; 612. a guide convex rib; 613. a first connecting piece; 614. a second connecting sheet; 6141. a first sheet body; 61411. a first circular bore section; 61412. a first through section; 61413. a first chuck table; 6142. a second sheet body; 61421. a second circular bore section; 61422. a second pass-through section; 61423. a second chuck table; 6143. a lug structure; 62. an upper position switch; 63. a lower position switch; 64. a circuit board; 70. a positioning structure; 81. a first base; 82. a second base.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 8, the lifting device of the present embodiment includes: crane 10, first support 20, second support 30, drive mechanism 40 and stroke assembly 60. The first and second supports 20 and 30 are spaced apart from each other at the bottom or inside of the crane 10. The first support member 20 includes a first leg and a second leg adjustably coupled to the first leg, the second leg being coupled to the crane 10, and the second support member 30 includes a third leg and a fourth leg adjustably coupled to the third leg, the fourth leg being coupled to the crane 10. The driving mechanism 40 includes a motor assembly 41 connected to the second leg and a lead screw 42 in driving engagement with the motor assembly 41. A nut assembly 50 is secured to the first leg in driving engagement with the lead screw 42. The stroke assembly 60 includes a mounting plate 61, and an upper position switch 62 and a lower position switch 63 spaced apart from the mounting plate 61. The top end of the mounting plate 61 is connected to the motor assembly 41, and the nut assembly 50 is located between the upper position switch 62 and the lower position switch 63. The screw rod 42 rotates relative to the nut component 50 to drive the second leg and the fourth leg to ascend and descend, and the nut component 50 has an upper limit position in trigger fit with the upper position switch 62 and a lower limit position in trigger fit with the lower position switch 63. Therefore, the second supporting leg cannot exceed the limit interval, and the internal structure of the supporting leg is prevented from being damaged.

By applying the technical solution of the present embodiment, the stroke assembly 60 includes a mounting plate 61, and an upper position switch 62 and a lower position switch 63 which are disposed on the mounting plate 61 at intervals. The top end of the mounting plate 61 is connected to the motor assembly 41, and the nut assembly 50 is located between the upper position switch 62 and the lower position switch 63. Wherein, motor element 41 drive lead screw 42 rotates, and lead screw 42 can rotate in order to drive second landing leg and fourth landing leg to go up and down for nut component 50, and the second landing leg goes up and down to drive crane 10 and carry out the elevating movement to make nut component 50 have with upper position switch 62 trigger the complex upper limit position and trigger the complex lower limit position with lower position switch 63. Like this, because upper position switch 62 and lower position switch 63 can be installed in advance on mounting panel 61 and constitute one set of stroke subassembly 60, can directly assemble stroke subassembly 60 to motor element 41 like this on, need not respectively with upper position switch 62 and lower position switch 63 installation first landing leg again for stroke subassembly 60 simple to operate can improve elevating gear packaging efficiency. Therefore, the technical scheme of the embodiment can solve the problem that the assembly efficiency of the electric lifting table in the related art is low. The lifting device is preferably a lifting table.

It should be noted that the nut component 50 is located between the upper position switch 62 and the lower position switch 63, which means that the nut component 50 is not only capable of moving in the area formed by the upper position switch 62 and the lower position switch 63, and when the nut component 50 is located at the upper position switch 62, the center of the nut component 50 and the center of the upper position switch 62 may be located on the same horizontal line, and when the nut component 50 is located at the lower limit position, the center of the nut component 50 and the center of the lower position switch 63 may be located on the same horizontal line.

It should be noted that the lifting table is in the highest state when the nut assembly 50 is in the lower limit position, and the lifting table is in the lowest state when the nut assembly 50 is in the upper limit position, that is, the distance between the top surface of the lifting frame of the lifting table and the ground in the highest state is greater than the distance between the top surface of the lifting frame of the lifting table and the ground in the lowest state.

The crane 10 in this embodiment may comprise only a cross beam, the second leg being connected to the inner side of the cross beam and the fourth leg being connected to the inner side of the cross beam. Of course, in other embodiments, the crane may comprise only a table, the second leg being connected to the bottom surface of the table and the fourth leg being connected to the bottom surface of the table. The lifting frame can also comprise a table plate and a cross beam, the cross beam is arranged at the bottom of the table plate, the second supporting leg is connected with the cross beam, and the fourth supporting leg is connected with the cross beam.

As shown in fig. 1 to 5, the first leg is a first inner tube 21, the second leg is a first outer tube 22 sleeved outside the first inner tube 21 in a position-adjustable manner, the third leg is a second inner tube 31, and the fourth leg is a second outer tube 32 sleeved outside the second inner tube 31 in a position-adjustable manner. Thus, the nested engagement of the first inner tube 21 and the first outer tube 22 prevents deflection of the first outer tube 22 during lifting, while the nested engagement of the second inner tube 31 and the second outer tube 32 prevents deflection of the second outer tube 32 during lifting. In order to make the lifting device compact, the mounting plate 61 is inserted into the nut assembly 50 and the first inner tube 21. The first inner tube 21 can protect the mounting plate 61 and prevent the upper position switch 62 and the lower position switch 63 on the mounting plate 61 from being exposed to the outside of the elevator apparatus and interfering with each other.

Of course, in the embodiment shown in the figures, the first leg may be a first strut, the second leg may be a second strut, the third leg may be a third strut, and the fourth leg may be a fourth strut. A first guide structure of a first sliding groove and a first sliding block in guide fit is arranged between the first supporting rod and the second supporting rod, and a second guide structure of a second sliding groove and a second sliding block in guide fit is arranged between the third supporting rod and the fourth supporting rod.

As shown in fig. 1 to 8, the nut assembly 50 includes a nut 51 and a frame 52 surrounding the nut 51. The frame 52 is fixed in the first inner pipe 21, the mounting plate 61 is positioned between the inner side of the frame 52 and the outer side of the nut 51, and the nut 51 is provided with the trigger 53. In order for the nut assembly 50 to have an upper limit position in activating engagement with the upper position switch 62 and a lower limit position in activating engagement with the lower position switch 63, the activating member 53 is capable of activating engagement with the upper position switch 62 and the lower position switch 63.

Specifically, the frame 52 includes a surrounding plate surrounding the nut 51 and a connecting rib provided between an outer side wall of the nut 51 and an inner side wall of the surrounding plate, so that the nut 51 can be stably positioned in the frame 52.

As shown in fig. 9 and 10, the trigger 53 includes a first slope portion 531 and a second slope portion 532 connected to an outer wall surface of the nut 51. The bottom of the first inclined plane portion 531 protrudes from the top of the first inclined plane portion 531, and is in triggering fit with the upper position switch 62. Thus, during the ascending of the upper position switch 62 on the mounting plate 61 with the first outer tube 22, the contact of the upper position switch 62 gradually contacts the top to bottom of the first inclined surface portion 531, so that the first inclined surface portion 531 completely presses on the contact of the upper position switch 62 to effectively trigger the upper position switch 62 to stop the nut assembly 50 at the upper limit position. The top of the second inclined plane part 532 protrudes from the bottom of the second inclined plane part 532 and is in triggering fit with the lower position switch 63. During the descent of the lower position switch 63 on the mounting plate 61 with the first outer tube 22, the contacts of the lower position switch 63 gradually contact from the bottom to the top of the second ramp 532, such that the second ramp 532 fully presses against the contacts of the lower position switch 63 to effectively trigger the lower position switch 63 to stop the nut assembly 50 at the lower limit position.

As shown in fig. 6 and 11, nut assembly 50 further includes a web 54 attached at an opening in rim 52. The mounting plate 61 is inserted into the nut assembly 50 and the first inner tube 21, and the connecting plate 54 is provided with an escape hole 55 for escaping from the mounting plate 61 in order to escape the nut assembly 50 from the mounting plate 61. Meanwhile, in order to enable the mounting plate 61 to move along a predetermined track in the process of lifting along with the first outer pipe 22, the avoiding hole 55 is in guiding fit with the mounting plate 61. The mounting plate 61 comprises a plate body 611 and a guide convex rib 612 arranged on the side wall of the plate body 611, and a guide groove 551 matched with the guide convex rib 612 in a guide manner is arranged on the hole wall of the avoiding hole 55, so that the guide convex rib 612 and the guide groove 551 are matched in a guide manner to form a predetermined track, deflection is prevented, the mounting plate 61 is lifted more stably, and the stability of the lifting device is higher.

As shown in fig. 7 and 11, the mounting plate 61 includes a plate body 611 and a first connecting piece 613 provided at a top end of the plate body 611. To facilitate the connection of the first connection tab 613 with the top of the motor assembly 41, the first connection tab 613 is disposed at an angle to the plate body 611, and the first connection tab 613 is connected with the top of the motor assembly 41 through the positioning structure 70. In this way, the first connecting piece 613 can be correctly mounted on the top of the motor assembly 41 by the positioning structure 70, providing mounting efficiency.

In this embodiment, specifically, the positioning structure 70 includes a boss disposed on the top of the motor assembly 41 and a positioning hole disposed on the first connecting plate 613, and the boss is aligned in the positioning hole, so that the first connecting plate 613 and the top of the motor assembly 41 can be placed in place without using screws, and the installation efficiency between the motor assembly 41 and the installation plate 61 is effectively improved.

As shown in fig. 8, 9 and 11, the mounting plate 61 further includes a second connecting piece 614 disposed at the bottom end of the plate body 611, and in order to facilitate the connection of the second connecting piece 614 with the bottom of the lead screw 42, the second connecting piece 614 is disposed at an angle to the plate body 611. The bottom of lead screw 42 has spliced pole 421 and the backstop portion 422 of being connected with spliced pole 421, and the diameter of spliced pole 421 is less than the diameter of lead screw 42, and backstop portion 422 protrusion is in the lateral wall of spliced pole 421. The second connecting piece 614 is sleeved outside the connecting column 421 and is matched with the stopping portion 422 in a stopping manner, so that the stopping portion 422 stops the second connecting piece 614 to prevent the second connecting piece 614 from moving downwards to separate from the bottom of the screw rod 42.

As shown in fig. 8, 9, 11, and 12, the second connecting piece 614 includes a first sheet 6141 connected to the bottom end of the plate body 611 and a second sheet 6142 stacked on the first sheet 6141 and connected to the first sheet 6141 in a clamping manner, so that the first sheet 6141 and the second sheet 6142 are simple in structure and convenient to assemble. First lamellar body 6141 cover is established in the outside of spliced pole 421 and is had the first breach that supplies spliced pole 421 to pass through, second lamellar body 6142 cover is established in the outside of spliced pole 421 and is had the second breach that supplies spliced pole 421 to pass through, like this, spliced pole 421 can be through first lamellar body 6141 and second lamellar body 6142, be convenient for restrict the radial movement of second connection piece 614 along spliced pole 421, backstop portion 422 backstop second lamellar body 6142 simultaneously, prevent that second connection piece 614 from following the axial downstream of spliced pole 421.

As shown in fig. 8, 9, 11 and 12, the first notch includes a first circular hole section 61411 matching with the connection column 421 and a first through section 61412 communicating the first circular hole section 61411 with the outside of the first sheet 6141, and the width of the first through section 61412 is smaller than the diameter of the first circular hole section 61411. Therefore, the first sheet 6141 can directly pass through the first through section 61412 and the first circular hole section 61411 from the outer side of the connecting column 421, and then the first sheet 6141 is sleeved outside the connecting column 421, so that the assembly is facilitated, and the first sheet 6141 is not required to be sleeved outside the connecting column 421 in a downward-to-upward manner. The second notch includes a second round hole section 61421 matching with the connecting column 421 and a second through section 61422 communicating the second round hole section 61421 with the outside of the second sheet body 6142. The width of the second pass-through section 61422 is less than the diameter of the second circular bore section 61421. Therefore, the second sheet body 6142 can directly pass through the second through section 61422 and the second circular hole section 61421 from the outer side of the connecting column 421, and then the second sheet body 6142 is sleeved outside the connecting column 421, so that the assembly is convenient, and the second sheet body 6142 is not required to be sleeved outside the connecting column 421 in a bottom-to-top mode. In addition, the first sheet body 6141 is provided with the first clamping table 61413 clamped in the second through section 61422, and the second sheet body 6142 is provided with the second clamping table 61423 clamped in the first through section 61412, so that the first sheet body 6141 and the second sheet body 6142 can be conveniently overlapped and then clamped and connected together, and the structure is more compact. At this time, the second connecting piece 614 is connected with the bottom of the screw rod 42 without using screws, the first connecting piece 613 is connected with the top of the motor assembly 41 without using screws, and the mounting plate 61 is connected with the motor assembly 41 and the screw rod 42 without using screws.

As shown in fig. 8 and 12, in order to ensure that the second through section 61422 is more firmly clamped with the first clamping platform 61413, the first through section 61412 is more firmly clamped with the second clamping platform 61423, and both the side wall surface of the first clamping platform 61413 and the side wall surface of the first through section 61412 are gradually expanded from the inside of the first sheet 6141 to the outside of the first sheet 6141. The side wall surface of the second clamping table 61423 and the side wall surface of the second through section 61422 are gradually expanded from the inside of the second blade 6142 to the outside of the second blade 6142. In this way, in the process that the first clamping table 61413 is clamped into the second through section 61422 from the outside of the first sheet 6141 to the inside of the first sheet 6141, the side wall surface of the first clamping table 61413 and the side wall surface of the second through section 61422 are extruded more and more tightly, and the clamping effect that the first clamping table 61413 is clamped into the second through section 61422 is ensured. In the same way, the clamping effect that the second clamping table 61423 is clamped into the first through section 61412 is also ensured.

As shown in fig. 3-11, to facilitate easy energization of both the upper position switch 62 and the lower position switch 63, the stroke assembly 60 further includes a circuit board 64 connected to the mounting plate 61. The up position switch 62 and the down position switch 63 are both connected to a circuit board 64. As shown in fig. 9 to 12, in order to facilitate the access to the second connecting piece 614, the outer wall surface of the second connecting piece 614 is provided with a lug structure 6143. Specifically, the lug structure 6143 is multiple, a portion of the lug structures 6143 is disposed on the first sheet 6141, and another portion of the lug structures 6143 is disposed on the second sheet 6142.

As shown in fig. 1 to 5 and 9 to 11, the motor assembly 41 includes a fixing frame 411, a motor 412 and a gear transmission structure 413. The fixing frame 411 is connected to the first outer tube 22, the motor 412 and the gear transmission structure 413 are both installed on the fixing frame 411, the motor 412 drives the screw rod 42 to rotate through the gear transmission structure 413, and the first connecting piece 613 is connected to the top of the fixing frame 411 through the positioning structure 70. Specifically, the crane 10 may only include a cross beam, the second leg is connected to the cross beam, the fourth leg is connected to the cross beam, the fixing frame 411 includes a folding plate and a box body connected to the cross beam at intervals, and the first connecting plate 613 is connected to the top of the box body through the positioning structure 70. The motor 412 is connected to the flap, the gear assembly of the gear transmission structure 413 is located in the box, the transmission rod of the gear transmission structure 413 is used for transmitting the rotation of the motor 412 to the gear assembly, and the gear assembly drives the lead screw 42 to rotate. In order to support the first inner tube 21 and the second inner tube 31, respectively, the lifting device further includes a first base 81 connected to the bottom of the first inner tube 21 and a second base 82 connected to the bottom of the second inner tube 31.

The set of stroke components and the installation mode of the lifting device of the embodiment can be adapted to different lifting tables, and the lifting table provided with the set of stroke components can save a manual switch and a control box with software, so that the cost is low; and even if the product is aged or damaged in use, the product can be replaced and maintained simply and quickly.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. A lifting device, comprising:

a lifting frame (10);

a first support member (20) and a second support member (30) which are arranged at intervals at the bottom surface or the inner side of the lifting frame (10), wherein the first support member (20) comprises a first support leg and a second support leg which is matched with the first support leg in a position-adjustable mode and is connected with the lifting frame (10), the second support member (30) comprises a third support leg and a fourth support leg which is matched with the third support leg in a position-adjustable mode and is connected with the lifting frame (10);

the driving mechanism (40) comprises a motor component (41) connected to the second supporting leg and a lead screw (42) in driving fit with the motor component (41), and a nut component (50) in driving fit with the lead screw (42) is fixed on the first supporting leg;

the stroke assembly (60) comprises an installation plate (61), an upper position switch (62) and a lower position switch (63) which are arranged on the installation plate (61) at intervals, the top end of the installation plate (61) is connected with the motor assembly (41), the nut assembly (50) is positioned between the upper position switch (62) and the lower position switch (63),

the screw rod (42) rotates relative to the nut component (50) to drive the second supporting leg and the fourth supporting leg to lift, and the nut component (50) is provided with an upper limit position in trigger fit with the upper position switch (62) and a lower limit position in trigger fit with the lower position switch (63).

2. The lifting device as recited in claim 1, characterized in that the first leg is a first inner tube (21), the second leg is a first outer tube (22) that is position-adjustably sleeved outside the first inner tube (21), the third leg is a second inner tube (31), the fourth leg is a second outer tube (32) that is position-adjustably sleeved outside the second inner tube (31), and the mounting plate (61) is disposed through the nut assembly (50) and the first inner tube (21).

3. The lifting device as claimed in claim 2, wherein the nut assembly (50) comprises a nut (51) and a frame (52) surrounding the nut (51), the frame (52) is fixed in the first inner tube (21), the mounting plate (61) is located between the inner side of the frame (52) and the outer side of the nut (51), a trigger (53) is arranged on the nut (51), and the trigger (53) can be in trigger fit with the upper position switch (62) and the lower position switch (63).

4. A lifting device according to claim 3, characterised in that the trigger member (53) comprises a first ramp portion (531) and a second ramp portion (532) connected to the outer wall surface of the nut (51), the bottom of the first ramp portion (531) protruding above the top of the first ramp portion (531) and being in triggering engagement with the upper position switch (62), and the top of the second ramp portion (532) protruding above the bottom of the second ramp portion (532) and being in triggering engagement with the lower position switch (63).

5. Lifting device according to claim 3,

the nut assembly (50) further comprises a connecting plate (54) connected to an opening of the frame (52), an avoiding hole (55) for avoiding the mounting plate (61) is formed in the connecting plate (54), and the avoiding hole (55) is matched with the mounting plate (61) in a guiding mode;

the mounting plate (61) comprises a plate body (611) and a guide convex rib (612) arranged on the side wall of the plate body (611), and a guide groove (551) matched with the guide convex rib (612) in a guide mode is arranged on the hole wall of the avoiding hole (55).

6. The lifting device as claimed in claim 5, wherein the mounting plate (61) comprises a plate body (611) and a first connecting piece (613) disposed at the top end of the plate body (611), the first connecting piece (613) is disposed at an angle to the plate body (611), and the first connecting piece (613) is connected to the top of the motor assembly (41) through a positioning structure (70).

7. The lifting device as claimed in claim 6, wherein the mounting plate (61) further comprises a second connecting piece (614) disposed at the bottom end of the plate body (611), the second connecting piece (614) and the plate body (611) are disposed at an angle, the bottom of the screw (42) has a connecting column (421) and a stopping portion (422) connected to the connecting column (421), the diameter of the connecting column (421) is smaller than the diameter of the screw (42), the stopping portion (422) protrudes out of the side wall of the connecting column (421), and the second connecting piece (614) is sleeved outside the connecting column (421) and is in stopping fit with the stopping portion (422).

8. The lifting device according to claim 7, wherein the second connecting piece (614) comprises a first sheet body (6141) connected to the bottom end of the plate body (611) and a second sheet body (6142) superposed with the first sheet body (6141) and connected in a clamping manner, the first sheet body (6141) is sleeved on the outer side of the connecting column (421) and has a first notch for the connecting column (421) to pass through, and the second sheet body (6142) is sleeved on the outer side of the connecting column (421) and has a second notch for the connecting column (421) to pass through.

9. The lifting device according to claim 8, wherein the first notch comprises a first circular hole section (61411) matched with the connecting column (421) and a first through section (61412) enabling the first circular hole section (61411) to be communicated with the outside of the first sheet body (6141), the width of the first through section (61412) is smaller than the diameter of the first circular hole section (61411), the second notch comprises a second circular hole section (61421) matched with the connecting column (421) and a second through section (61422) enabling the second circular hole section (61421) to be communicated with the outside of the second sheet body (6142), the width of the second through section (61422) is smaller than the diameter of the second circular hole section (3265 zxft 86565), the first through section (61422) is clamped into a second through section (3579) on the first through section (6125) which the second circular hole section (613579) is clamped into a second through table (6179).

10. The lifting device according to claim 9, wherein the side wall surface of the first clamping platform (61413) and the side wall surface of the first through section (61412) are gradually expanded from the inside of the first sheet body (6141) to the outside of the first sheet body (6141), and the side wall surface of the second clamping platform (61423) and the side wall surface of the second through section (61422) are gradually expanded from the inside of the second sheet body (6142) to the outside of the second sheet body (6142).

11. The lifting device according to claim 7,

the stroke assembly (60) further comprises a circuit board (64) connected to the mounting plate (61), the upper position switch (62) and the lower position switch (63) both being connected to the circuit board (64);

the outer wall surface of the second connecting sheet (614) is provided with a lug structure (6143);

the motor assembly (41) comprises a fixed frame (411), a motor (412) and a gear transmission structure (413), the fixed frame (411) is connected with the first outer pipe (22), the motor (412) and the gear transmission structure (413) are both installed on the fixed frame (411), the motor (412) drives the lead screw (42) to rotate through the gear transmission structure (413), and the first connecting piece (613) is connected with the top of the fixed frame (411) through the positioning structure (70);

the lifting frame (10) comprises a table plate and a cross beam arranged at the bottom of the table plate, the second supporting leg is connected with the cross beam, the fourth supporting leg is connected with the cross beam, and the fixing frame (411) is connected with the cross beam;

the lifting device further comprises a first base (81) connected to the bottom of the first inner pipe (21) and a second base (82) connected to the bottom of the second inner pipe (31).

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