Household lifting platform

Abstract

The utility model belongs to the field of smart home, and discloses a household lifting platform. Comprising a bottom plate assembly; the lower ends of the left outer stand column assembly and the right outer stand column assembly are fixedly connected with the bottom plate assembly; the left inner stand column assembly is in sliding connection with the left outer stand column assembly; the left outer stand column assembly slides relative to the left inner stand column assembly. The right inner stand column assembly is in sliding connection with the right outer stand column assembly; the right outer stand column assembly slides relative to the right inner stand column assembly. The protective cover assembly is arranged above the bottom plate assembly, and the left inner stand column assembly and the right inner stand column assembly are connected with the protective cover assembly; the protective cover assembly comprises a driving structure; one end of each screw is connected with the driving structure, and the other end of each screw is connected with the corresponding inner stand column assembly; the driving structure drives the screw to rotate, the screw rotates to enable the outer stand column assembly to slide relative to the inner stand column assembly and get close to or away from the protection cover assembly, the left outer stand column assembly and the right outer stand column assembly jointly drive the bottom plate assembly to move up and down, and lifting is achieved.

Description

Technical Field

[0001] The utility model relates to the field of smart home, and particularly relates to a household lifting platform. Background Art

[0002] The intelligentization of home is the development trend of modern society. Subsequently, there appears an auxiliary lifting device used in conjunction with smart home, and the auxiliary lifting device is required to have stability and a long service life. At present, the household lifting platforms on the market use steel wires to achieve lifting and lowering. However, the steel wires are soft materials, which are prone to shaking and instability during the lifting process. Moreover, the steel wires are prone to breakage and entanglement, resulting in poor stability of the product, high failure rate, and short service life. Summary of the Utility Model

[0003] To solve the above technical problems, a household lifting platform adopting a rigid mechanical transmission structure is provided, which runs smoothly, will not break, and has a long service life.

[0004] To achieve the above object, the technical solution adopted by the utility model is: a household lifting platform, which includes,

[0005] A bottom plate assembly;

[0006] A left outer column assembly, the lower end of which is fixedly connected to the bottom plate assembly;

[0007] A right outer column assembly, which is arranged parallel to and opposite the left outer column assembly, and the lower end of which is fixedly connected to the bottom plate assembly;

[0008] A left inner column assembly, which is slidably connected to the left outer column assembly; the left outer column assembly slides relative to the left inner column assembly;

[0009] A right inner column assembly, which is slidably connected to the right outer column assembly; the right outer column assembly slides relative to the right inner column assembly;

[0010] A protective cover assembly, which is arranged above the bottom plate assembly, and the left inner column assembly and the right inner column assembly are connected to the protective cover assembly; the protective cover assembly includes a driving structure;

[0011] Sliding rails, at least one sliding rail is arranged on each of the left inner column and the right inner column, the sliding rails on the left and right sides are arranged in parallel, one side is fixedly connected to the inner column on the same side, and the other side is fixedly connected to the outer column on the same side;

[0012] Screws, at least one screw is arranged on each of the left inner column and the right inner column, the screws on the left and right sides are arranged in parallel, one end of which is connected to the driving structure, and the other end is connected to the corresponding inner column assembly;

[0013] Wherein, the driving structure drives the screw to rotate. The rotation of the screw causes the outer column assembly to slide relative to the inner column assembly, approaching or departing from the protective cover assembly, so that the left outer column assembly and the right outer column assembly jointly drive the bottom plate assembly to move up and down to achieve lifting.

[0014] According to the present utility model, further, the left inner column assembly and the right inner column assembly have the same structure, including a vertically arranged inner column. The left inner column has a space for installing a screw and a slide rail; an upper bearing seat is arranged at the upper end of the inner column, and the upper bearing seat is fixedly connected to the protective cover assembly;

[0015] A second bearing is arranged in the upper bearing seat;

[0016] The lower end of the inner column is fixedly connected with a lower bearing seat, and a first bearing is arranged in the lower bearing seat;

[0017] The lower end of the screw is connected to the first bearing, and the upper end sequentially passes through the second bearing and the bottom surface of the protective cover assembly and is sleeved with a second circlip;

[0018] A nut slider is in spiral fit connection with the outer periphery of the screw. The inner column is also fixedly connected with a slide rail arranged parallel to the screw, and the nut slider slides along the chute of the slide rail;

[0019] The nut slider is fixedly connected to the outer column assembly on the corresponding side. The nut slider slides along the chute of the slide rail, driving the outer column assembly to approach or depart from the protective cover assembly, so as to drive the bottom plate assembly to move up and down.

[0020] According to the present utility model, further, the left outer column assembly and the right outer column assembly have the same structure, including a vertically arranged outer column. The outer column is fixedly connected to the nut slider. The upper end surface of the outer column is connected to the outer column cover, and the lower end surface of the outer column is fixedly connected to the bottom plate assembly.

[0021] According to the present utility model, further, the protective cover assembly is of a shell structure. An electric motor transmission box assembly and a transmission box assembly drivingly connected thereto are arranged inside the shell. The output end of the transmission box assembly is connected to the screw to provide driving force for the screw.

[0022] According to the utility model, further, the motor transmission box assembly includes a motor connecting seat fixedly connected to the top surface of the protective cover base, the motor connecting seat is fixedly connected to the motor, and the top surface of the motor connecting seat is fixedly connected to the bevel gear box, the two together form a cavity, and a worm gear is arranged in the cavity; a third bearing is arranged at the bottom of the motor connecting seat, and a fourth bearing coaxial with the third bearing is arranged at the bottom of the bevel gear box; a first bevel gear and a second bevel gear meshing with each other are arranged in the bevel gear box; a first retaining spring is arranged at one end of the connecting shaft of the first bevel gear after passing through the fourth bearing, and then the transmission connection is connected to the third bearing after passing through the center hole of the worm gear, and fifth bearings are arranged at both ends of the connecting shaft of the second bevel gear, and the axis of the connecting shaft of the second bevel gear is perpendicular to the axis of the connecting shaft of the first bevel gear.

[0023] According to the utility model, further, the transmission box assembly includes two bevel gear boxes, one of which is fixedly connected to the motor connecting seat and forms a cavity; the bottom surface of the other bevel gear box is fixedly connected to a support seat, a third bearing is arranged at the bottom of the support seat, a fourth bearing is arranged at the bottom of the bevel gear box, and the bevel gear box is fixedly connected to the support seat; a first bevel gear and a second bevel gear that mesh with each other are arranged in the bevel gear box; a first retaining spring is arranged at one end of the connecting shaft of the first bevel gear after passing through the fourth bearing, and then connected to the third bearing, and fifth bearings are respectively arranged at both ends of the connecting shaft of the second bevel gear, and the axis of the connecting shaft of the second bevel gear is perpendicular to the axis of the connecting shaft of the first bevel gear; the motor transmission box assembly is transmission-connected to the transmission box assembly through a transmission shaft.

[0024] According to the utility model, further, the base plate assembly includes an upper base plate and a lower base plate arranged parallel to the upper base plate, and a storage space for accommodating the switch assembly is formed between the two; the left and right sides of the upper base plate are respectively fixedly connected to the lower end faces of the outer columns on the corresponding sides, and the switch assembly is fixedly arranged on the lower surface of the upper base plate.

[0025] According to the utility model, further, it also includes a switch assembly, which is arranged in the accommodating space of the switch assembly of the bottom plate assembly; the switch assembly includes a switch upper plate, a switch base, a switch, an elastic component and a guide fixing member; the switch and the elastic component are arranged in the switch base, the upper end of the elastic component is connected to the switch upper plate, and the lower end is connected to the switch base, the guide fixing member penetrates the switch base and is fixedly connected to the switch upper plate, and the switch base can move along the axis of the bolt.

[0026] According to the utility model, further, a lamp trough is integrally provided on the inner side surface of the outer column, and a lamp is provided in the lamp trough.

[0027] According to the utility model, further, a back plate is arranged between the left inner column assembly and the right inner column assembly, and the left and right ends of the back plate are respectively connected to the left inner column assembly or the right inner column assembly on the corresponding side.

[0028] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model is combined with a household cabinet body to achieve intelligent lifting; a rigid telescopic structure is adopted to drive the lifting movement of the bottom plate assembly, improving the stability of the lifting movement, and there will be no breakage or shaking during the lifting process. Moreover, due to the adoption of the rigid lifting structure, the service life of the present utility model is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a household lifting platform of the present utility model;

[0030] Figure 2 is a schematic internal structure diagram of a protective cover assembly of a household lifting platform of the present utility model;

[0031] Figure 3a is an exploded view of a household lifting platform of the present utility model;

[0032] Figure 3b is Figure 3a a partially enlarged schematic view at B of

[0033] Figure 4 is an exploded view of the bottom plate assembly of the present utility model;

[0034] Figure 5 is an exploded view of the switch assembly of the present utility model;

[0035] Figure 6 is a schematic sectional structure diagram of a household lifting platform of the present utility model;

[0036] Figure 7 is Figure 6 a sectional structure diagram in the A-A direction of

[0037] In the figure, 1 - right inner column, 2 - back plate, 3 - slide rail, 4 - lower bearing seat, 5 - first bearing, 6 - left inner column, 7 - right outer column, 8 - left outer column, 9 - protective cover base, 10 - upper bearing seat, 11 - second bearing, 12 - screw, 13 - first circlip, 14 - motor connection seat, 15 - third bearing, 16 - worm gear, 17 - motor, 18 - bevel gear box, 19 - fourth bearing, 20 - fifth bearing, 21 - first bevel gear, 22 - second bevel gear, 23 - bevel gear box cover, 25 - nut slider, 26 - right protective cover, 27 - left protective cover, 30 - upper protective cover, 31 - left outer column cover, 32 - lower wire pressing plate, 33 - right outer column cover, 34 - support seat, 35 - transmission shaft, 36 - connecting wire, 39 - controller, 40 - power supply, 42 - power cord, 43 - second circlip, 45 - lamp, 46 - lamp shade, 110 - protective cover assembly, 120 - right inner column assembly, 130 - right outer column assembly, 150 - bottom plate assembly, 151 - upper bottom plate, 152 - switch assembly, 153 - lower bottom plate, 1521 - switch base, 1522 - spring, 1523 - switch upper plate, 1524 - switch, 1525 - gasket, 160 - left outer column assembly, 170 - left inner column assembly, 180 - motor drive box assembly, 210 - drive box assembly. Detailed implementation mode

[0038] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0039] As Figures 1-7As shown in the figure, a household lifting platform is used to be combined with household products such as kitchen wall cabinets, bathroom cabinets, dressing tables, bookcases, sideboards, etc. to achieve home intelligence. It includes a bottom plate assembly 150 for placing items. On both sides of the upper surface of the bottom plate assembly 150, a left outer column assembly 160 and a right outer column assembly 130 are fixedly connected relatively. The left outer column assembly 160 and the right outer column assembly 130 are respectively connected with a left inner column assembly 170 and a right inner column assembly 120. The tops of the left inner column assembly 170 and the right inner column assembly 120 are fixedly connected to a protective cover assembly 110, jointly forming the overall framework of the lifting platform. Among them, the left outer column assembly 160 and the right outer column assembly 130 move up and down along the length directions of the corresponding left inner column assembly 170 and right inner column assembly 120, driving the bottom plate assembly 150 to achieve lifting movement. In order to fix the whole lifting platform on a wall or other vertical surfaces, a back plate 2 is arranged between the left inner column assembly 170 and the right inner column assembly 120 to keep the left inner column assembly 170 and the right inner column assembly 120 parallel; the back plate 2 is strip-shaped, and its left and right ends are respectively fixedly connected to the corresponding left inner column assembly 170 and right inner column assembly 120; preferably, multiple back plates 2 are arranged at equal intervals, which can not only fix the lifting platform on a wall or other vertical surfaces, but also, through its connection with the left inner column assembly 170 and the right inner column assembly 120, keep the left inner column assembly 170 and the right inner column assembly 120 parallel while increasing the overall strength of the framework and improving the stability of the two driving the bottom plate assembly 150 to lift. The back plate 2 can also be square. Similarly, its left and right ends are respectively fixedly connected to the corresponding left inner column assembly 170 and right inner column assembly 120. The height of the back plate 2 is less than the lengths of the left inner column assembly 170 and the right inner column assembly 120. Installing a back plate 2 with a certain height at one time reduces the installation difficulty of installing multiple back plates 2.

[0040] Specifically, the left inner column assembly 170 and the right inner column assembly 120 have the same structure and are symmetrically arranged about the left and right of the bottom plate assembly 150. Among them, the left inner column assembly 170 includes a vertically arranged left inner column 6, and the left inner column 6 has a space for installing the screw 12 and the slide rail 3. At the upper end of the left inner column 6, an upper bearing seat 10 is provided, and the upper bearing seat 10 is fixedly connected to the bottom surface of the protective cover assembly 110. A second bearing 11 is arranged in the upper bearing seat 10. At the lower end of the left inner column 6, a lower bearing seat 4 is fixedly connected, and the lower bearing seat 4 is fixedly connected to the left outer column upper cover 31 on the corresponding side described below. A first bearing 5 is arranged in the lower bearing seat 4. The screw 12 is vertically arranged, its lower end is connected to the first bearing 5, and after passing through the second bearing 11 and the bottom surface of the protective cover assembly 110 in sequence at the upper end, a second circlip 43 is sleeved. The two ends of the screw 12 are respectively connected by the first bearing 5 and the second bearing 11 to form a longitudinal support, which is arranged parallel to the left inner column 6. A nut slider 25 is helically and cooperatively connected to the outer periphery of the screw 12. The left inner column 6 is also fixedly connected with a slide rail 3 arranged parallel to the screw 12, and the nut slider 25 slides along the chute of the slide rail 3. Among them, the nut slider 25 is fixedly connected to the left outer column assembly 160 on the corresponding side. The nut slider 25 slides along the chute of the slide rail 3 to drive the outer column assembly 160 to approach or move away from the protective cover assembly 110, thereby realizing the lifting movement of the bottom plate assembly 150. The screw 12, the nut slider 25 and the slide rail 3 are all rigid parts with a certain strength. During the process of driving the bottom plate assembly 150 to lift, the problem of wire rope winding caused by the wire rope driving the lifting will not occur, and there will be no shaking, improving the stability of the bottom plate assembly 150 during the lifting process.

[0041] The right inner column assembly 120 includes a vertically arranged right inner column 1 which has a space for installing the screw 12 and the slide rail 3; at the upper end of the right inner column 1, there is an upper bearing seat 10 which is fixedly connected to the bottom surface of the protective cover assembly 110. A second bearing 11 is arranged inside the upper bearing seat 10. At the lower end of the right inner column 1, there is a lower bearing seat 4 which is fixedly connected to the corresponding side's right outer column upper cover 33 described below. A first bearing 5 is arranged inside the lower bearing seat 4; the screw 12 is vertically arranged, its lower end is connected to the first bearing 5, and after passing through the second bearing 11 and the bottom surface of the protective cover assembly 110 in sequence at the upper end, a second snap ring 43 is sleeved. The two ends of the screw 12 are respectively connected by the first bearing 5 and the second bearing 11 to form a longitudinal support, which is arranged parallel to the right inner column 1. A nut slider 25 is in spiral fit connection with the outer periphery of the screw 12. The right inner column 1 is also fixedly connected with a slide rail 3 arranged parallel to the screw 12. The nut slider 25 slides along the chute of the slide rail 3. Among them, the nut slider 25 is fixedly connected to the corresponding side's right outer column assembly 130. The nut slider 25 slides along the chute of the slide rail 3, driving the right outer column assembly 130 to approach or move away from the protective cover assembly 110, so as to realize its cooperation with the left outer column assembly 160 and drive the bottom plate assembly 150 to realize lifting movement.

[0042] Specifically, the left outer column assembly 160 has the same structure as the right outer column assembly 130. Among them, the left outer column assembly 160 includes a vertically arranged left outer column 8 which is fixedly connected to the nut slider 25. The upper end surface of the left outer column 8 is fixedly connected with a left outer column upper cover 31, and a lower pressure wire plate 32 is arranged between them. The lower end surface of the left outer column 8 is fixedly connected to the bottom plate assembly 15; the nut slider 25 slides along the chute of the slide rail 3, driving the left outer column 8 to move up and down, and further realizing driving the bottom plate assembly 15 to lift; the right outer column assembly 130 includes a vertically arranged right outer column 7 which is fixedly connected to the nut slider 25. The upper end surface of the right outer column 7 is fixedly connected with a right outer column upper cover 33, and the lower end surface is fixedly connected to the bottom plate assembly 15; the nut sliders 25 on both sides slide along the chute of the slide rail 3 at the same time, driving the corresponding side's outer column to move up and down, and further realizing driving the bottom plate assembly to lift.

[0043] Specifically, the protective cover assembly 110 includes a protective cover base 9, a protective cover left cover 27 and a protective cover right cover 26 arranged on the peripheral wall of the protective cover base 9, and a protective cover upper cover 30 arranged above the protective cover base 9 and connected to the corresponding side's protective cover left cover 27 and protective cover right cover 26 at both ends respectively, jointly forming a long strip-shaped shell structure. An electric motor 17, an electric motor transmission box assembly 180, a transmission box assembly 210, a transmission shaft 35, a power supply 40 and a controller 39 are installed inside the shell. Among them, the power cord 42 of the power supply 40 extends to the outside of the shell.

[0044] Among them, the motor transmission box assembly 180 includes a motor connection seat 14 fixedly connected to the top surface of the protective cover base 9, and the motor 17 is fixedly connected to the motor connection seat 14; the bevel gear box 18 described in detail below is fixedly connected to the motor connection seat 14 and forms a cavity, and a worm gear 16 is arranged in the cavity; a third bearing 15 is arranged at the bottom of the motor connection seat 14, and a fourth bearing 19 coaxial with the third bearing 15 is arranged at the bottom of the bevel gear box 18; a first bevel gear 21 and a second bevel gear 22 that mesh with each other are arranged in the bevel gear box 18. Among them, one end of the connecting shaft of the first bevel gear 21 is provided with a first snap ring 13 after passing through the fourth bearing 19, and then is transmission-connected to the third bearing 15 after passing through the central hole of the worm gear 16. Both ends of the connecting shaft of the second bevel gear 22 are respectively provided with fifth bearings 20, and the axis of the connecting shaft of the second bevel gear 22 is perpendicular to the axis of the connecting shaft of the first bevel gear 21.

[0045] The transmission box assembly 210 includes a bevel gear box 18. A support seat 34 is fixedly connected to the bottom surface of the bevel gear box 18, and a bevel gear box cover 23 is fixedly connected to the top surface. A third bearing 15 is arranged at the bottom of the support seat 34, and a fourth bearing 19 is arranged at the bottom of the bevel gear box 18. The bevel gear box 18 is fixedly connected to the support seat 34; a first bevel gear 21 and a second bevel gear 22 that mesh with each other are arranged in the bevel gear box 18. Among them, one end of the connecting shaft of the first bevel gear 21 is provided with a first snap ring 13 after passing through the fourth bearing 19, and then is connected to the third bearing 15. Both ends of the connecting shaft of the second bevel gear 22 are respectively provided with fifth bearings 20, and the axis of the connecting shaft of the second bevel gear 22 is perpendicular to the axis of the connecting shaft of the first bevel gear 21. One end of the transmission shaft 35 is transmission-connected and inserted into the central hole of the second bevel gear 22 in the motor transmission box assembly 180, and the other end is transmission-connected and inserted into the central hole of the second bevel gear 22 in the transmission box assembly 210. The motor transmission box assembly 180 is transmission-connected to the transmission box assembly 210 through the transmission shaft 35, and the output end of the transmission box assembly 210 is connected to the screw 12 to provide driving force for the screw 12.

[0046] In this embodiment, the bottom plate assembly 160 includes an upper bottom plate 151 and a lower bottom plate 153 arranged in parallel with the upper bottom plate 151, and a receiving space for receiving the switch assembly 152 is formed therebetween. Among them, the left and right sides of the lower bottom plate 153 and the upper bottom plate 151 are respectively fixedly connected to the lower end surfaces of the corresponding left outer column 8 and right outer column 7. The switch assembly 152 is fixedly arranged on the lower surface of the upper bottom plate 151, and the switch base 1521 is fixedly connected to the upper surface of the lower bottom plate 153. The switch assembly 152 is connected to the switch base 1521; preferably, there are no less than two groups of switch assemblies 152, and one group can also be set, and an appropriate number of switch assemblies 152 are installed according to the lighting requirements.

[0047] Specifically, the switch assembly 152 includes a switch upper plate 1523, a switch base 1521, a switch 1524, a spring 1522, a bolt 1526 and a gasket 1525; a switch 1524 and a spring 1522 are fixedly arranged in the switch base 1521, the upper end of the spring 1522 is connected to the switch upper plate 1523, and the lower end is connected to the switch base 1521, the bolt 1526 passes through the gasket 1525 and the switch base 1521 in sequence and is fixedly connected to the switch upper plate 1523, the switch base 1521 can move along the axis of the bolt 1526, and the switch is electrically connected to the controller 39 via the connecting line 36.

[0048] In this embodiment, a lamp trough is integrally provided on the inner side of the left outer column 8 and / or the right outer column 7, a lamp 45 is provided in the lamp trough, and a lamp cover 46 is provided on the periphery of the lamp 45, wherein the lamp 45 is electrically connected to the controller 39 via a connecting line 36, and the on and off of the lamp 45 is controlled by the controller 39. Preferably, the controller 39 is a switching power supply.

[0049] Working principle: After the power supply in the protective cover is connected to the external power supply through the power cord, it is transformed into DC to power the controller. When the switch component gives the controller an up or down signal, the controller starts to power the motor. The worm of the motor output shaft drives the worm wheel to rotate counterclockwise or clockwise, and the worm wheel drives the bevel gear 1 to rotate synchronously. The bevel gear 1 transmits power to the bevel gear 2 through the teeth meshing with the bevel gear 2. The bevel gear 2 drives the bevel gear 2 in the transmission box assembly on the other side to rotate synchronously through the transmission shaft, and the bevel gear 2 drives the bevel gear 1 to rotate synchronously. The bevel gear 1 on both sides is respectively connected to the screw on the same side. When the bevel gear 1 rotates, it drives the screws on both sides to rotate synchronously, and the slider nuts set on the screws on both sides move up and down. The left and right outer columns fixed with the slider nuts move synchronously along the direction of the slide rail and the direction of the screw axis, and the bottom plate assembly fixed on the left and right outer columns also moves with it; different objects can be placed on the bottom plate assembly to achieve the rising or falling of the objects.

[0050] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A household lifting platform, wherein: include, Base plate assembly; A left outer column assembly, the lower end of which is fixedly connected to the base plate assembly; A right outer column assembly is arranged relatively parallel to the left outer column assembly, and a lower end of the right outer column assembly is fixedly connected to the bottom plate assembly; A left inner column assembly is slidably connected to the left outer column assembly; the left outer column assembly slides relative to the left inner column assembly; A right inner column assembly is slidably connected to the right outer column assembly; the right outer column assembly slides relative to the right inner column assembly; A protective cover assembly is arranged above the bottom plate assembly, and the left inner column assembly and the right inner column assembly are connected to the protective cover assembly; the protective cover assembly includes a driving structure; A slide rail, at least one of which is disposed on each of the left inner column and the right inner column, the slide rails on the left and right sides are disposed in parallel, one side of which is fixedly connected to the inner column on the same side, and the other side of which is fixedly connected to the outer column on the same side; A screw rod, at least one of which is disposed on each of the left inner column and the right inner column, the screw rods on the left and right sides are disposed in parallel, one end of which is connected to the driving structure, and the other end is connected to the corresponding inner column assembly; Among them, the driving structure drives the screw to rotate, and the rotation of the screw causes the outer column assembly to slide relative to the inner column assembly, approaching or moving away from the protective cover assembly, so that the left outer column assembly and the right outer column assembly jointly drive the base plate assembly to move up and down to achieve lifting.

2. A household lifting platform as claimed in claim 1, wherein: The left inner column assembly and the right inner column assembly have the same structure, including a vertically arranged inner column, and the left inner column has a space for installing a screw rod and a slide rail; an upper bearing seat is arranged at the upper end of the inner column, and the upper bearing seat is fixedly connected to the protective cover assembly; A second bearing is arranged in the upper bearing seat; The lower end of the inner column is fixedly connected to a lower bearing seat, and a first bearing is arranged in the lower bearing seat; The lower end of the screw is connected to the first bearing, and the upper end passes through the second bearing and the bottom surface of the protective cover assembly in sequence and is then covered with a second retaining spring; The outer circumference of the screw rod is spirally connected with a nut slider, and the inner column is also fixedly connected with a slide rail arranged parallel to the screw rod, and the nut slider slides along the slide groove of the slide rail; The nut slider is fixedly connected to the outer column assembly on the corresponding side, and the nut slider slides along the slide groove of the slide rail to drive the outer column assembly to approach or move away from the protective cover assembly, thereby driving the base plate assembly to move up and down.

3. A household lifting platform as claimed in claim 1, wherein: The left outer column assembly has the same structure as the right outer column assembly, including a vertically arranged outer column, the outer column is fixedly connected to a nut slider, the upper end surface of the outer column is connected to the outer column cover, and the lower end surface of the outer column is fixedly connected to the base plate assembly.

4. A household lifting platform as claimed in claim 1, wherein: The protective cover assembly is a shell structure, and a motor transmission box assembly and a transmission box assembly connected to the motor transmission box assembly are arranged inside the shell. The output end of the transmission box assembly is connected to the screw rod to provide driving force to the screw rod.

5. A household lifting platform as claimed in claim 4, wherein: The motor transmission box assembly includes a motor connecting seat fixedly connected to the top surface of the protective cover base, the motor connecting seat is fixedly connected to the motor, and the top surface of the motor connecting seat is fixedly connected to the bevel gear box, the two together form a cavity, and a worm gear is arranged in the cavity; a third bearing is arranged at the bottom of the motor connecting seat, and a fourth bearing coaxial with the third bearing is arranged at the bottom of the bevel gear box; a first bevel gear and a second bevel gear meshing with each other are arranged in the bevel gear box; a first retaining spring is arranged at one end of the connecting shaft of the first bevel gear after passing through the fourth bearing, and then the first retaining spring is connected to the third bearing after passing through the center hole of the worm gear, and fifth bearings are arranged at both ends of the connecting shaft of the second bevel gear, and the axis of the connecting shaft of the second bevel gear is perpendicular to the axis of the connecting shaft of the first bevel gear.

6. A household lifting platform as claimed in claim 5, wherein: The transmission box assembly includes two bevel gear boxes, one of which is fixedly connected to the motor connecting seat and forms a cavity; the bottom surface of the other bevel gear box is fixedly connected to a support seat, a third bearing is arranged at the bottom of the support seat, a fourth bearing is arranged at the bottom of the bevel gear box, and the bevel gear box is fixedly connected to the support seat; a first bevel gear and a second bevel gear meshing with each other are arranged in the bevel gear box; a first retaining spring is arranged at one end of the connecting shaft of the first bevel gear after passing through the fourth bearing, and then connected to the third bearing, fifth bearings are respectively arranged at both ends of the connecting shaft of the second bevel gear, and the axis of the connecting shaft of the second bevel gear is perpendicular to the axis of the connecting shaft of the first bevel gear; the motor transmission box assembly is transmission-connected to the transmission box assembly through a transmission shaft.

7. A household lifting platform as claimed in claim 1, wherein: The base plate assembly includes an upper base plate and a lower base plate arranged parallel to the upper base plate, and a storage space for accommodating the switch assembly is formed between the two; the left and right sides of the upper base plate are respectively fixedly connected to the lower end surfaces of the outer columns on the corresponding sides, and the switch assembly is fixedly arranged on the lower surface of the upper base plate.

8. A household lifting platform as claimed in claim 7, wherein: It also includes a switch assembly, which is arranged in the accommodating space of the switch assembly of the base plate assembly; the switch assembly includes a switch upper plate, a switch base, a switch, an elastic component and a guide fixing component; the switch and the elastic component are arranged in the switch base, the upper end of the elastic component is connected to the switch upper plate, and the lower end is connected to the switch base, the guide fixing component penetrates the switch base and is fixedly connected to the switch upper plate, and the switch base can move along the axis of the bolt.

9. A household lifting platform as claimed in claim 1, wherein: The inner side surface of the outer column is integrally provided with a lamp groove, and a lamp is arranged in the lamp groove.

10. A household lifting platform as claimed in claim 1, wherein: A back plate is arranged between the left inner column assembly and the right inner column assembly, and the left and right ends of the back plate are respectively connected to the left inner column assembly or the right inner column assembly on the corresponding side.

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