Lifting device for electric height-adjustable furniture
By setting a compensation element structure with clearance holes and spring pieces on the support ring, the processing and assembly difficulties caused by the clearance hole position of the inner tube in the prior art are solved, and the effects of simplifying processing and improving assembly efficiency are achieved.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2026-03-12
AI Technical Summary
In existing lifting devices, the gaps between the interlocking tubular structures need to be filled by compensating elements, but the setting of avoidance holes increases the processing difficulty and assembly complexity of the inner tube.
The compensation element adopts a support ring and spring sheet structure. By setting clearance holes and spring sheets on the support ring, clearance holes are avoided on the inner tube. Installation is achieved by utilizing the elastic deformation of the spring sheet, which simplifies the processing and assembly of the inner tube.
This reduces the processing difficulty and assembly complexity of the inner tube, improves assembly efficiency, and ensures the stable installation of compensation components and the stability of the tubular structure.
Smart Images
Figure CN2025104458_12032026_PF_FP_ABST
Abstract
Description
Lifting device of electric lifting furniture TECHNICAL FIELD
[0001] The present application belongs to the field of lifting equipment, and particularly relates to a lifting device of electric lifting furniture. BACKGROUND
[0002] At present, the lifting devices on the market usually have two or more than two tubular structures which are telescopically connected, and the tubular structures move relatively along the axial direction to realize lifting. Because of machining errors and other reasons, there is usually a certain gap between the telescopically connected tubular structures, and a compensation element is needed to fill in to avoid shaking when the tubular structures move relatively.
[0003] The existing compensation element usually has a design outward tube bending point provided thereon, so a avoiding hole position needs to be reserved on the inner tube to avoid the inward tube bending point during installation, so as to provide a deformation space for the point by the inner tube. The setting of the avoiding hole position increases the processing difficulty of the inner tube, and the avoiding hole position also needs to be aligned with the point during installation, which makes the assembly of the inner tube, the outer tube and the compensation element more difficult and reduces the assembly efficiency. SUMMARY
[0004] The technical problem to be solved by the present application is to provide a lifting device of electric lifting furniture to solve the problem of opening an avoiding hole position on the inner tube to avoid the compensation element.
[0005] To solve the above technical problems, the present application adopts the following technical scheme: a lifting device of electric lifting furniture, comprising: a first tubular component; and a second tubular component nested in the first tubular component and axially slidable; and a compensation element arranged between the first tubular component and the second tubular component for compensating the gap therebetween; the compensation element comprises a first compensation element mounted on the end of the first tubular component and a second compensation element mounted on the outer side wall of the second tubular component, the inner wall of the first tubular component is provided with a clamping groove, the first compensation element comprises a support ring located between the first tubular component and the second tubular component, the support ring is provided with a spring and an avoiding hole for avoiding the spring during installation, one end of the spring is connected to the inner wall of the avoiding hole, and the other end of the spring extends into the clamping groove to be clamped with the clamping groove. The technical scheme has the following technical effects:
[0006] The first compensation element is sleeved on the outer side wall of the second tubular component, and the second compensation element is installed on the outer side wall of the second tubular component, and then the first tubular component is sleeved on the outer side of the second tubular component. Because the elastic sheet and the avoiding hole for avoiding the elastic sheet are arranged on the support ring, in the sleeving process, the first tubular component touches and extrudes the elastic sheet in the direction of the support ring, so that the elastic sheet elastically deforms in the direction of the avoiding hole, the elastic sheet enters the avoiding hole to avoid the inner wall of the first tubular component, until the clamping groove is aligned with the elastic sheet, the elastic sheet extruded by the first tubular component is reset to the outer side wall of the support ring under the action of the elastic force to extend into the clamping groove and be clamped with the clamping groove. At this time, the first tubular component and the first compensation element are installed in place, the first compensation element is fixed on the end of the first tubular component, and the installation ring is located between the first tubular component and the second tubular component. In the installation, the elastic sheet can be avoided through the avoiding hole on the first compensation element, and it is not necessary to open a hole position on the second tubular component to reserve a space for the deformation of the elastic sheet, thereby reducing the processing difficulty and the processing accuracy of the second tubular component. In the installation, it is not necessary to accurately align the second tubular component and the first compensation element, thereby reducing the assembly difficulty and improving the assembly efficiency.
[0007] In the lifting device of the electric lifting furniture, the support ring comprises a ring body and a plurality of extension plates connected to the ring body, the extension plates extend along the axial direction of the ring body, and the avoiding hole and the elastic sheet are arranged on the extension plates. By arranging the extension plates, sufficient installation positions are provided for the avoiding hole and the elastic sheet while reducing the space occupied by the support ring as a whole, so that the elastic sheet is stably connected with the first tubular component. Preferably, the elastic sheet and the support ring are in an integrated structure, so as to reduce the production and processing difficulty.
[0008] In the lifting device of the electric lifting furniture, the end of the extension plate away from the ring body is inclined and provided with a guide surface, and the guide surface is arranged towards the inner wall of the first tubular component. The guide surface is arranged away from the second tubular component, and can guide the installation of the end of the first tubular component. In the installation, the end of the first tubular component can be quickly and cooperatively installed with the first compensation element by sliding along the guide surface, so as to improve the assembly speed.
[0009] In the lifting device of the electric lifting furniture, the supporting ring further comprises a limiting step protruding from the outer circumferential side of the ring body, and the limiting step abuts against the end of the first tubular component. After the lifting device is assembled, the limiting step abuts against the end of the first tubular component to limit the first compensation element, so as to prevent the first compensation element from moving with the second tubular component to the middle part of the first tubular component when the second tubular component is retracted into the first tubular component, and to ensure that the first compensation element stably fills the gap between the end of the first tubular component and the second tubular component, that is, to ensure that the first tubular component always stably supports the second tubular component through the first compensation element when the second tubular component is lifted, and to prevent the second tubular component from shaking.
[0010] In the lifting device of the electric lifting furniture, the supporting ring comprises a mounting end close to the end of the first tubular component and a matching end opposite to the mounting end, and the elastic sheet is mounted on the side of the avoiding hole away from the mounting end. When the first tubular component, the second tubular component, the first compensation element and the second compensation element are installed, the first tubular component can gradually press the elastic sheet from one end connected with the supporting ring to the other end, so as to move the elastic sheet into the avoiding hole, without the aid of other tools, and the assembly is convenient and simple.
[0011] In the lifting device of the electric lifting furniture, the included angle between the elastic sheet and the outer side wall of the supporting ring is α, and α satisfies α < 90°. When installed, even without the aid of external force, the elastic sheet will not be pushed away from the avoiding hole by the first tubular component, and the stable work of the elastic sheet is ensured.
[0012] In the lifting device of the electric lifting furniture, the elastic sheet and the supporting ring are in an integrated structure, so as to reduce the production and processing difficulty.
[0013] In the lifting device of the electric lifting furniture, the length and width of the avoiding hole are greater than the length and width of the elastic sheet, respectively. When the elastic sheet is deformed and stretched into the avoiding hole during the installation of the elastic sheet and the first tubular component, an avoiding gap is formed between the inner wall of the avoiding hole and the outer circumferential side of the elastic sheet. The edge of the elastic sheet is not in contact with the inner wall of the avoiding hole, so as to avoid the friction between the inner wall of the avoiding hole and the edge of the elastic sheet to hinder the automatic reset of the elastic sheet to be engaged with the clamping groove, and to ensure the stable engagement of the elastic sheet and the first tubular component during the installation.
[0014] In the lifting device of the electric lifting furniture, the second compensation element comprises an elastic supporting plate tightly embracing the outer side wall of the second tubular component and a mounting protrusion provided on the elastic supporting plate, and the second tubular component is provided with a insertion hole, and the mounting protrusion is inserted into the insertion hole. The elastic supporting plate tightly embraces the outer side wall of the second tubular component to cooperatively work with the first compensation element to jointly support the circumferential side of the second tubular component, so as to better limit the radial direction and prevent the second tubular component from shaking.
[0015] In the lifting device of the electric lifting furniture, the elastic supporting plate comprises a first side plate and a second side plate which respectively embrace two adjacent side walls of the second tubular member, and the connecting position of the first side plate and the second side plate is aligned with the edge of the corner of the second tubular member. The connecting position of the first side plate and the second side plate is aligned with the edge of the corner of the second tubular member, the elastic supporting plate embraces the edges of the corners of the periphery of the second tubular member, so that the elastic supporting plate can support the two outer side walls on both sides of the edges of the corners of the second tubular member, the amount of the elastic supporting plate is reduced, and the limiting effect is improved.
[0016] The features and advantages of the present application will be described in detail in the following detailed description, drawings and claims. BRIEF DESCRIPTION OF DRAWINGS
[0017] The present application will be further described below in conjunction with the drawings and specific embodiments:
[0018] Fig. 1 is an assembly view of the lifting device of the electric lifting furniture of the present application;
[0019] Fig. 2 is an assembly view of the second tubular member and the compensation element;
[0020] Fig. 3 is an exploded view of the lifting device of the electric lifting furniture of the present application;
[0021] Fig. 4 is an enlarged view of A of Fig. 3;
[0022] Fig. 5 is a perspective view of the first compensation element;
[0023] Fig. 6 is a partial sectional view of the lifting device of the electric lifting furniture of the present application.
[0024] Reference signs: 100, first tubular member; 110, clamping groove; 200, second tubular member; 210, insertion hole; 300, first compensation element; 310, supporting ring; 311, ring body; 312, extension plate; 3121, guide surface; 313, limiting step; 314, mounting end; 315, matching end; 320, elastic sheet; 330, avoiding hole; 400, second compensation element; 410, elastic supporting plate; 411, first side plate; 412, second side plate; 420, mounting protrusion. DETAILED DESCRIPTION
[0025] The application provides a lifting device of an electric lifting furniture, which comprises a first tubular component, a second tubular component nested in the first tubular component and axially slidable relative to the first tubular component, and a compensation element arranged between the first tubular component and the second tubular component to compensate for the gap therebetween. The compensation element comprises a first compensation element mounted at the end of the first tubular component and a second compensation element mounted on the outer sidewall of the second tubular component. The inner wall of the first tubular component is provided with a clamping groove. The first compensation element comprises a supporting ring located between the first tubular component and the second tubular component, the supporting ring is provided with a spring and an avoiding hole for avoiding the spring during installation. One end of the spring is connected to the inner wall of the avoiding hole, and the other end of the spring extends into the clamping groove to be clamped with the clamping groove. The first compensation element is arranged in a ring shape, and the spring and the avoiding hole for avoiding the spring are arranged on the supporting ring. During installation, the spring can be avoided through the avoiding hole on the first compensation element, and it is not necessary to open an avoiding hole position for the spring on the second tubular component to reserve a space for the deformation of the spring, thereby reducing the processing difficulty and the processing precision of the second tubular component. During installation, it is not necessary to accurately align the second tubular component and the first compensation element, thereby reducing the assembly difficulty and improving the assembly efficiency.
[0026] The technical solutions of the embodiments of the application will be explained and described below in combination with the drawings of the embodiments of the application. The following embodiments are only preferred embodiments of the application, and not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor also belong to the protection scope of the application.
[0027] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.
[0028] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified, the meaning of "multiple" is two or more, unless otherwise explicitly limited.
[0029] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", and the like, should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0030] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0031] Embodiment one:
[0032] The application discloses a lifting device of an electric lifting furniture, as shown in figures 1-6, comprising a first tubular component 100, a second tubular component 200 and a compensation element, the first tubular component 100 is sleeved outside the second tubular component 200, and the first tubular component 100 and the second tubular component 200 can slide axially relative to each other to realize the lifting of the lifting device, and the compensation element is arranged between the first tubular component 100 and the second tubular component 200 to compensate the gap between the inner wall of the first tubular component 100 and the outer wall of the second tubular component 200. The compensation element comprises a first compensation element 300 and a second compensation element 400, the first compensation element 300 is installed on the end of the first tubular component 100, and the second compensation element 400 is installed on the outer wall of the second tubular component 200, when the first tubular component 100 and the second tubular component 200 slide axially relative to each other, the first compensation element 300 and the second compensation element 400 are always between the first tubular component 100 and the second tubular component 200 to fill the gap between them and avoid the axial shaking of them. A clamping groove 110 is arranged on the inner wall of the first tubular component 100, the first compensation element 300 comprises a supporting ring 310, the supporting ring 310 is provided with a spring piece 320 and an avoiding hole 330, one end of the spring piece 320 is connected to the inner wall of the avoiding hole 330, and the other end deviates to the outside of the supporting ring 310 to protrude from the outer wall of the supporting ring 310. Of course, it can be understood that a plurality of tubular components and a plurality of compensation elements can also be arranged in the embodiment, in any two adjacent tubular components, the tubular component on the relative outside is the first tubular component 100, and the tubular component on the relative inside is the second tubular component 200.
[0033] In order to avoid that the first compensating element 300 on the first tubular component 100 hinders the second compensating element 400 on the second tubular component 200 when the first tubular component 100 and the second tubular component 200 are sleeved, the present application needs to first sleeve the first compensating element 300 on the outer sidewall of the second tubular component 200 and install the second compensating element 400 on the outer sidewall of the second tubular component 200 before sleeving the first tubular component 100 on the outer side of the second tubular component 200 when installing the first tubular component 100, the second tubular component 200, the first compensating element 300 and the second compensating element 400, as shown in Fig. 2. Because the elastic sheet 320 is arranged on the support ring 310 and the avoiding hole 330 is arranged for avoiding the elastic sheet 320, the first tubular component 100 touches and extrudes the elastic sheet 320 in the direction of the support ring 310 during the sleeving process, so that the elastic sheet 320 elastically deforms in the direction of the avoiding hole 330, the elastic sheet 320 enters the avoiding hole 330 to avoid the inner wall of the first tubular component 100, until the clamping groove 110 is aligned with the elastic sheet 320, the elastic sheet 320 which is no longer extruded by the first tubular component 100 is reset to the outer sidewall of the support ring 310 under the action of the elastic force to extend into the clamping groove 110 and be clamped with the clamping groove 110. At this time, the first tubular component 100 and the first compensating element 300 are installed in place, the first compensating element 300 is fixed on the end of the first tubular component 100, and the installation ring is located between the first tubular component 100 and the second tubular component 200. During installation, the avoiding hole 330 on the first compensating element 300 can avoid the elastic sheet 320, without the need to open a hole on the second tubular component 200 to reserve space for the deformation of the elastic sheet 320, thereby reducing the processing difficulty and processing accuracy of the second tubular component 200. During installation, the second tubular component 200 and the first compensating element 300 do not need to be accurately aligned, thereby reducing the assembly difficulty and improving the assembly efficiency.
[0034] As shown in Figs. 3 and 5, the support ring 310 includes a ring body 311 and a plurality of extension plates 312, the plurality of extension plates 312 are connected on the ring body 311 at intervals to surround the central axis of the support ring 310, the extension plates 312 extend along the axial direction of the ring body 311, and the avoiding hole 330 and the elastic sheet 320 are arranged on each extension plate 312. By arranging the extension plates 312, the space occupied by the support ring 310 as a whole is reduced, and sufficient installation positions are provided for the avoiding hole 330 and the elastic sheet 320, so that the elastic sheet 320 is stably connected with the first tubular component 100. Preferably, the elastic sheet 320 and the support ring 310 are in an integrated structure to reduce the production and processing difficulty.
[0035] In order to facilitate the extension plate 312 to quickly extend into the gap between the first tubular component 100 and the second tubular component 200 during installation, the embodiment is provided with a guide surface 3121 arranged obliquely at the end of the extension plate 312 away from the ring body 311, which is arranged away from the second tubular component 200 and can guide the installation of the end of the first tubular component 100. During installation, the end of the first tubular component 100 can be quickly installed and matched with the first compensation element 300 by sliding along the guide surface 3121, thereby improving the assembly speed. After assembly, the guide surface 3121 is arranged towards the inner wall of the first tubular component 100.
[0036] In the embodiment, the support ring 310 further comprises an annular limiting step 313 coaxially arranged on the outer periphery of the ring body 311. After the assembly of the lifting device is completed, the limiting step 313 abuts against the end of the first tubular component 100 to limit the first compensation element 300, so as to avoid the movement of the first compensation element 300 along with the second tubular component 200 to the middle of the first tubular component 100 when the second tubular component 200 is retracted into the first tubular component 100, thereby ensuring the stable filling of the first compensation element 300 to the gap between the end of the first tubular component 100 and the second tubular component 200, i.e. ensuring that the first tubular component 100 always maintains stable support to the second tubular component 200 through the first compensation element 300 during the lifting of the second tubular component 200, thereby preventing the second tubular component 200 from shaking.
[0037] The two ends of the support ring 310 are respectively an installation end 314 and a matching end 315. The installation end 314 is the end of the support ring 310 close to the end of the first tubular component 100 (i.e. the lower end of the support ring 310 in FIG. 6), and the matching end 315 is the end of the support ring 310 opposite to the installation end 314 (i.e. the upper end of the support ring 310 in FIG. 6). The elastic sheet 320 is installed on one side of the avoiding hole 330 close to the matching end 315. During the installation of the first tubular component 100, the second tubular component 200, the first compensation element 300 and the second compensation element 400, the first tubular component 100 can gradually press the elastic sheet 320 from one end connected with the support ring 310 to the other end, so as to move the elastic sheet 320 into the avoiding hole 330, without the aid of other tools, thereby facilitating the assembly. As shown in FIG. 6, the included angle between the elastic sheet 320 and the outer side wall of the support ring 310 is α, which satisfies α < 90°. Even without the aid of external force, the elastic sheet 320 will not be pushed away from the avoiding hole 330 by the first tubular component 100 during installation, thereby ensuring the stable work of the elastic sheet 320. Preferably, α is 15°.
[0038] In the embodiment, the length and width of the avoiding hole 330 are greater than the length and width of the elastic sheet 320 respectively, when the elastic sheet 320 is deformed during the installation process to enter the avoiding hole 330 as a whole, an avoiding gap can be formed between the inner wall of the avoiding hole 330 and the outer circumferential side of the elastic sheet 320, so that the edge of the elastic sheet 320 does not contact the inner wall of the avoiding hole 330, to avoid the friction between the inner wall of the avoiding hole 330 and the edge of the elastic sheet 320 to hinder the automatic resetting of the elastic sheet 320 to be clamped with the clamping groove 110, thereby ensuring the stable clamping of the elastic sheet 320 and the first tubular component 100 during the installation.
[0039] The second compensation element 400 comprises an elastic support plate 410 and a mounting protrusion 420 arranged on the elastic support plate 410, and the second tubular component 200 is provided with a insertion hole 210, the mounting protrusion 420 is inserted into the insertion hole 210, and a plurality of elastic support plates 410 are tightly wrapped on the outer side wall of the second tubular component 200 to cooperate with the first compensation element 300 to jointly support the circumferential side of the second tubular component 200, so that the radial limiting effect is better, and the second tubular component 200 is prevented from shaking. Preferably, the elastic support plate 410 comprises a first side plate 411 and a second side plate 412 connected to each other, the first side plate 411 and the second side plate 412 are respectively attached to two adjacent side walls of the second tubular component 200, and the connecting part of the first side plate 411 and the second side plate 412 is aligned with the edge of the corner of the second tubular component 200, so that the elastic support plate 410 can tightly wrap the edges of the corners of the second tubular component 200, and the elastic support plate 410 can simultaneously support the two outer side walls on both sides of the edges of the corners of the second tubular component 200, thereby reducing the amount of the elastic support plate 410 and improving the limiting effect.
[0040] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the technical field, some improvements and refinements without departing from the principles of the present application shall also be considered as the protection scope of the present application.
Claims
1. A lifting device of an electric lifting furniture, comprising: a first tubular member; and a second tubular member nested in the first tubular member and axially slidable relative to the first tubular member; and a compensation element arranged between the first tubular member and the second tubular member for compensating a gap therebetween; characterized in that the compensation element comprises a first compensation element mounted at an end of the first tubular member and a second compensation element mounted on an outer sidewall of the second tubular member, an inner wall of the first tubular member is provided with a clamping groove, the first compensation element comprises a support ring located between the first tubular member and the second tubular member, the support ring is provided with a spring and an avoiding hole for avoiding the spring when being mounted, one end of the spring is connected to an inner wall of the avoiding hole, and the other end of the spring extends into the clamping groove to be clamped with the clamping groove. The support ring comprises a ring body and a plurality of extension plates connected to the ring body, the extension plates extend along an axial direction of the ring body, and the avoiding hole and the spring are arranged on the extension plates. An end of the extension plate away from the ring body is provided with a guide surface, and the guide surface is arranged towards the inner wall of the first tubular member. The support ring further comprises a limiting step protruding from an outer circumferential side of the ring body, and the limiting step abuts against an end of the first tubular member. The support ring comprises a mounting end close to the end of the first tubular member and a matching end opposite to the mounting end, and the spring is mounted on a side of the avoiding hole away from the mounting end. An included angle between the spring and an outer sidewall of the support ring is α, and α satisfies α < 90°. The spring and the support ring are in an integral structure.
2. The lifting device of a motor-driven lifting furniture according to claim 1, characterized in that: A length and a width of the avoiding hole are greater than a length and a width of the spring respectively, and when the spring is deformed and extends into the avoiding hole during the mounting process of the spring and the first tubular member, an avoiding gap is formed between an inner wall of the avoiding hole and an outer circumferential side of the spring.
3. A lifting device for electrically operated lifting furniture according to claim 2, characterized in that The second compensation element comprises an elastic support plate tightly embracing the outer sidewall of the second tubular member and a mounting protrusion arranged on the elastic support plate, and the second tubular member is provided with a insertion hole, and the mounting protrusion is inserted into the insertion hole.
4. The lifting device of a motorized lifting furniture according to claim 2, characterized in that: The elastic support plate comprises a first side plate and a second side plate respectively tightly embracing two adjacent sidewalls of the second tubular member, and a connecting portion of the first side plate and the second side plate is aligned with an edge at a corner of the second tubular member.
5. The lifting device of a motorized lifting furniture according to claim 1 or 2, characterized in that: 6. A lifting device for electrically operated lifting furniture according to claim 5, characterized in that: 7. The lifting device of a motorized lifting furniture according to claim 5, characterized in that: 8. The lifting device of a motorized lifting furniture according to claim 1, characterized in that: 9. The lifting device of a motorized lifting furniture according to claim 1, characterized in that: 10. The lifting device of a motorized lifting furniture according to claim 9, characterized in that:
Citation Information
Patent Citations
Non-porous casing pipe structure with decorative sleeve and linear driver
CN110973818A
Brake mechanism easy to install and lifting stand column adopting brake mechanism
CN114607744A
Lifting table structure
CN207220472U
Lifting pole
CN208434912U
Lifting stand column for lifting table and lifting table
CN212014835U