Lifting device of electric lifting furniture

Abstract

The utility model discloses a lifting device of electric lifting furniture, which comprises a first tubular part, a second tubular part and a compensating element, and the compensating element is arranged between the first tubular part and the second tubular part and used for compensating a gap between the first tubular part and the second tubular part. A fixing protrusion and a hot melting protrusion are arranged on the inner side of the compensation element, a mounting hole is formed in the second tubular component, the fixing protrusion is inserted into the mounting hole, the compensation element clamps the second tubular component, and the hot melting protrusion is heated to deform to be in the shape corresponding to the outer surface of the second tubular component. In the process that the compensation element is installed on the second tubular part, the second tubular part is clamped, stable installation of the compensation element on the second tubular part is kept, accurate filling of a gap between the first tubular part and the second tubular part by the compensation element is guaranteed through the hot melting protrusions, and the compensation element is prevented from being damaged. Multiple attempts for installation between the first tubular part and the second tubular part are not needed, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of lifting equipment, and in particular relates to a lifting device for electric lifting furniture. Background Art

[0002] With the improvement of living standards, electric lift furniture is being used more and more widely. The lifting device of electric lift furniture usually includes two or more telescopic tubes, which are connected to each other to form a lifting structure that can be extended and retracted under the push of a driving structure.

[0003] In order to prevent the lifting structure from shaking during the extension and retraction process due to the gap between the two telescopic tubes, a compensating element such as a sliding sleeve is usually provided between the two telescopic tubes to fill the gap. However, since the telescopic tube is usually an extruded profile or a rolled and longitudinally welded hollow profile, it has a large manufacturing tolerance, resulting in an unstable gap between the two telescopic tubes. It is necessary to prepare compensating elements of different sizes for multiple installation attempts until a compensating element suitable for the gap between the two telescopic tubes to be assembled is found. This results in great difficulty in assembly, low assembly efficiency, and high production cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a lifting device for electric lifting furniture to solve the problem of low assembly efficiency of the lifting device.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a lifting device for electric lifting furniture, comprising: a first tubular component; and a second tubular component, which is nested in the first tubular component and can slide axially relative to the first tubular component; and a compensation element, which is arranged between the first tubular component and the second tubular component to compensate for the gap between the two; the compensation element has an inner side facing the second tubular component and an outer side facing the first tubular component, the outer side of the compensation element is provided with a sliding surface contacting the inner surface of the first tubular component, the inner side of the compensation element is provided with a fixing protrusion and a hot-melt protrusion, the second tubular component is provided with a mounting hole, the fixing protrusion is inserted into the mounting hole so that the compensation element is attached to the outer side surface of the second tubular component, the second tubular component forces the compensation element to bend outward to adapt to the local circumferential contour of the second tubular component, thereby keeping the fixing protrusion clamping the second tubular component, and the hot-melt protrusion is plastically deformed by heat to present a shape corresponding to the outer surface of the second tubular component.

[0006] In the lifting device of the above-mentioned electric lifting furniture, the second tubular component has a first side wall and a second side wall connected at an angle α, and the compensation element includes a first base and a second base connected at an angle β, the first base is attached to the first side wall, and the second base is attached to the second side wall. When the compensation element is not installed, β<α.

[0007] In the lifting device of the electric lifting furniture, the compensation element includes a connecting body connected between the first base and the second base, and the connecting body is in an arc-shaped bending structure, so that the bending deformation of the compensation element is concentrated on the connecting body.

[0008] In the above-mentioned lifting device for electric lifting furniture, the second tubular component has a corner connecting the first side wall and the second side wall, and the connecting body corresponds to the corner and a gap is maintained between the two.

[0009] In the lifting device of the above-mentioned electric lifting furniture, a first fixing protrusion is provided on the inner side of the first base, a second fixing protrusion is provided on the inner side of the second base, the first side wall has a first mounting hole, the second side wall has a second mounting hole, the first fixing protrusion is inserted into the first mounting hole and clamps the first side wall, and the second fixing protrusion is inserted into the second mounting hole and clamps the second side wall.

[0010] In the lifting device of the above-mentioned electric lifting furniture, a first hot-melt protrusion is provided on the inner side of the first base body, and the first hot-melt protrusion is plastically deformed when heated and presents a shape corresponding to the outer surface of the first side wall. A second hot-melt protrusion is provided on the inner side of the second base body, and the second hot-melt protrusion is plastically deformed when heated and presents a shape corresponding to the outer surface of the second side wall.

[0011] In the above-mentioned lifting device of electric lifting furniture, at least one longitudinal end of the first base is bent inwardly to form a first guide body, and at least one longitudinal end of the second base is bent inwardly to form a second guide body.

[0012] In the lifting device of the above-mentioned electric lifting furniture, the two longitudinal ends of the first base are bent inward to form a first guide body, and the two longitudinal ends of the second base are bent inward to form a second guide body. The first guide body and the second guide body on the same side of the compensation element are separated from each other.

[0013] In the lifting device of the electric lifting furniture, the outer side of the first guide body forms a first guiding slope transitioning to the outer side of the first base, and the outer side of the second guide body forms a second guiding slope transitioning to the outer side of the second base.

[0014] In the lifting device of the above-mentioned electric lifting furniture, the hot-melt protrusion gradually shrinks from its root toward the free end.

[0015] In the above-mentioned lifting device of electric lifting furniture, the second tubular component is a circular tube, the compensating element is arranged in an arc shape, and the curvature of the compensating element when not installed is greater than the curvature of the outer surface of the second tubular component.

[0016] In the lifting device of the above-mentioned electric lifting furniture, a plurality of hot-melt protrusions are dispersedly distributed on the inner side of the compensation element, and the plurality of hot-melt protrusions diffuse toward the gaps between each other when they are plastically deformed by heat.

[0017] In the lifting device of the above-mentioned electric lifting furniture, the hot-melt protrusion is in the shape of a convex point, a rib, or a block.

[0018] In the above-mentioned lifting device of the electric lifting furniture, the hot-melt protrusion has a lower melting point than the compensation element and the fixing protrusion.

[0019] In the above-mentioned lifting device of electric lifting furniture, at least two rows of compensation elements are arranged between the first tubular component and the second tubular component at intervals along the axial direction.

[0020] The beneficial effects of the utility model are:

[0021] The lifting device of electric lifting furniture includes: a first tubular component; and a second tubular component, which is nested in the first tubular component and can slide axially relative to the first tubular component; and a compensation element, which is arranged between the first tubular component and the second tubular component to compensate for the gap between the two; the compensation element has an inner side facing the second tubular component and an outer side facing the first tubular component, the outer side of the compensation element is provided with a sliding surface that contacts the inner surface of the first tubular component, the inner side of the compensation element is provided with a fixing protrusion and a hot-melt protrusion, the second tubular component is provided with a mounting hole, the fixing protrusion is inserted into the mounting hole so that the compensation element is attached to the outer side surface of the second tubular component, the second tubular component forces the compensation element to bend outward to adapt to the local circumferential contour of the second tubular component, thereby keeping the fixing protrusion clamping the second tubular component, and the hot-melt protrusion is plastically deformed by heat to present a shape corresponding to the outer surface of the second tubular component. This technical solution has the following technical effects:

[0022] The utility model arranges the compensating element between the first tubular component and the second tubular component into a structure with a fixing protrusion, so that during installation, the compensating element can be inserted into the mounting hole on the second tubular component through the fixing protrusion, so as to realize its rapid positioning and installation on the second tubular component, thereby reducing the difficulty of assembly. At the same time, the plug-in fixing protrusion and mounting hole can limit the compensating element in the axial and circumferential directions. By setting the compensating element as a deformable structure, during the process of installing the compensating element on the second tubular component, the outer side surface of the second tubular component can force the compensating element to deform to present an outward bending posture, and the outward-expanding compensating element is reset in the direction of clamping the second tubular component under the action of its own elastic force, so as to clamp the second tubular component and keep the compensating element firmly installed on the second tubular component, and avoid the compensating element from radially disengaging from the second tubular component, thereby ensuring the stable insertion of the fixing protrusion and the mounting hole, and avoiding the compensating element being pushed by the first tubular component when the first tubular component is subsequently sleeved and axially or circumferentially moving on the outer surface of the second tubular component, so as to compensate for the gap between the first tubular component and the second tubular component, and prevent the two from shaking during the lifting process. Because a hot-melt protrusion that abuts against the second tubular component is provided on the inner side of the compensation element, the second tubular component is heated before the first tubular component is sleeved. The high-temperature second tubular component can melt the hot-melt protrusion attached to the outer surface of the second tubular component. At this time, the first tubular component is sleeved on the outer side of the second tubular component. The first tubular component can push the compensation element toward the second tubular component, so that the hot-melt protrusion that is melted by heat is squeezed into the space around it and plastically deforms, so that the inner side of the compensation element presents a shape corresponding to the outer surface of the second tubular component, thereby increasing the contact area between the second tubular component and the compensation element, and improving the compensation element. At the same time, by melting and extruding the hot-melt protrusion, the length between the end of the hot-melt protrusion away from the compensation element and the end installed on the compensation element can be reduced, so that the inner wall of the first tubular component abuts against the sliding surface while the second tubular component abuts against the hot-melt protrusion, ensuring that the compensation element accurately fills the gap between the first tubular component and the second tubular component. There is no need to prepare compensation elements of different sizes according to the different gaps between the first tubular component and the second tubular component, and there is no need to make multiple attempts to install between the first tubular component and the second tubular component, which greatly reduces the difficulty of assembly, improves assembly efficiency, and reduces production costs.

[0023] The second tubular component has a first side wall and a second side wall connected at an angle of α, and the compensating element includes a first substrate and a second substrate connected at an angle of β, the first substrate is attached to the first side wall, and the second substrate is attached to the second side wall. When the compensating element is not installed, β<α. When the compensating element is not installed on the second tubular component, β<α. During the installation of the compensating element to the second tubular component, the first substrate moves closer to the first side wall, and at the same time, the second substrate moves closer to the second side wall. However, because the angle between the first substrate and the second substrate is smaller than the angle between the first side wall and the second side wall, during the installation process, the first side wall pushes the first substrate, and the second side wall pushes the second substrate to open the compensating element, so that when the compensating element is installed on the second tubular component, the first substrate abuts and hugs the outer surface of the first side wall, and the second substrate abuts and hugs the outer surface of the second side wall, and the fitting effect is better.

[0024] The compensation element includes a connector connected between a first substrate and a second substrate. The connector has an arc-shaped curved structure so that the bending deformation of the compensation element is concentrated on the connector. Compared with the angle formed by the direct connection between the first substrate and the second substrate, the arc-shaped connector is more convenient for the deformation and expansion of the compensation element, thereby avoiding breakage at the connection between the first substrate and the second substrate and extending the service life of the compensation element.

[0025] The second tubular component has a corner connecting the first side wall and the second side wall, and the connector corresponds to the corner and a gap is maintained between the two. The setting of the gap makes the compensating element better in holding the second tubular component and more stable in installation. When the first tubular component is sleeved, the gap can also provide a deformation space for the heat-melted hot-melt protrusion to prevent the heat-melted hot-melt protrusion from overflowing from between the compensating element and the second tubular component.

[0026] A first fixing protrusion is provided on the inner side of the first base, a second fixing protrusion is provided on the inner side of the second base, the first side wall has a first mounting hole, the second side wall has a second mounting hole, the first fixing protrusion is inserted into the first mounting hole and clamps the first side wall, and the second fixing protrusion is inserted into the second mounting hole and clamps the second side wall. The two fixing protrusions are provided so that the second tubular component can be respectively installed and positioned on the first base and the second base through the two mounting holes on the two adjacent side walls, thereby reducing the difficulty of assembly and having a better limiting effect on the compensation element, thereby preventing the compensation element from shaking on the surface of the second tubular component and ensuring the stable operation of the compensation element.

[0027] A first hot-melt protrusion is provided on the inner side of the first substrate, and the first hot-melt protrusion is plastically deformed when heated to present a shape corresponding to the outer surface of the first side wall. A second hot-melt protrusion is provided on the inner side of the second substrate, and the second hot-melt protrusion is plastically deformed when heated to present a shape corresponding to the outer surface of the second side wall. The first hot-melt protrusion is plastically deformed when heated to present a shape corresponding to the outer surface of the first side wall to fit with the outer surface of the first side wall, and the second hot-melt protrusion is plastically deformed when heated to present a shape corresponding to the outer surface of the second side wall to fit with the outer surface of the second side wall, so that the inner side of the compensation element is more closely fitted with the outer side wall of the second tubular component, thereby making the compensation element better at compensating the gap between the first tubular component and the second tubular component.

[0028] At least one longitudinal end of the first substrate is bent inwardly to form a first guide body, and at least one longitudinal end of the second substrate is bent inwardly to form a second guide body. When installing the first tubular component and the second tubular component, the first guide body and the second guide body can prevent the first substrate and the second substrate from hindering the installation of the first tubular component, making the installation smoother.

[0029] The two longitudinal ends of the first substrate are bent inward to form a first guide body, the two longitudinal ends of the second substrate are bent inward to form a second guide body, and the first guide body and the second guide body on the same side of the compensation element are separated from each other. By arranging the first guide body at the two longitudinal ends of the first substrate and arranging the second guide body at the two longitudinal ends of the second substrate, the deformation effect of the compensation element is good, and the upper and lower ends of the first substrate and the second substrate are subjected to more uniform force. The first guide body and the second guide body on the same side of the compensation element are separated from each other, so that the deformation of the first guide body and the second guide body does not affect each other, thereby ensuring the clamping effect of the first substrate and the second substrate on the second tubular component.

[0030] The first guide body forms a first guide slope on the outer side thereof to transition to the outer side of the first base, and the second guide body forms a second guide slope on the outer side thereof to transition to the outer side of the second base. When the first tubular component and the second tubular component are installed, the first guide slope and the second guide slope can guide the end of the first tubular component to guide the first tubular component to be smoothly sleeved with the second tubular component, without the need to accurately align the first tubular component and the second tubular component, thereby reducing the difficulty of assembly.

[0031] The hot-melt protrusion gradually shrinks from its root toward the free end, reducing the amount of material used in the end where the hot-melt protrusion abuts the second tubular component. When the first tubular component is sleeved on the outside of the second tubular component, the second tubular component can melt and squeeze the end of the hot-melt protrusion more quickly, so that the hot-melt protrusion can deform quickly. The melting process is fast and controllable, and the hot-melt protrusion can better cooperate with the outer side surface of the second tubular component to adapt to the outer contour of the second tubular component.

[0032] The second tubular component is a circular tube, and the compensating element is arranged in an arc shape. The curvature of the compensating element when not installed is greater than the curvature of the outer surface of the second tubular component, so that the installed compensating element hugs the second tubular component tightly, which has a good limiting effect on the compensating element.

[0033] A plurality of hot-melt protrusions are dispersedly distributed on the inner side of the compensation element. When the plurality of hot-melt protrusions are plastically deformed by heat, they diffuse toward the gaps between each other, filling the gap between the inner side of the compensation element and the outer side wall of the second tubular component to increase the contact surface while preventing the deformed portion of the hot-melt protrusion from overflowing from between the compensation element and the second tubular component, making it more beautiful.

[0034] The hot-melt protrusion has a lower melting point than the compensation element and the fixed protrusion, so that when the end of the hot-melt protrusion is heated and deformed by heat, the compensation element and the fixed protrusion with a higher melting point will not melt, thereby preventing the compensation element and the fixed protrusion from deforming uncontrollably, thereby ensuring that the compensation element stably compensates for the gap between the first tubular component and the second tubular component.

[0035] At least two rows of compensation elements are arranged between the first tubular component and the second tubular component at intervals along the axial direction. The compensation elements are supported at multiple points in the axial direction, so that the compensation elements between the first tubular component and the second tubular component have a better supporting effect on the first tubular component and the second tubular component, thereby preventing the first tubular component and the second tubular component from shaking during the lifting process.

[0036] The features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0038] Figure 1 It is an assembly diagram of the lifting device of the electric lifting furniture in the first embodiment;

[0039] Figure 2 for Figure 1 A magnified view of part A;

[0040] Figure 3 An exploded view of the lifting device of the electric lifting furniture in the first embodiment;

[0041] Figure 4 It is a schematic diagram of assembling the second tubular component and the compensation element in the first embodiment;

[0042] Figure 5 The three-dimensional structure of the compensation element in the first embodiment Figure 1 ;

[0043] Figure 6The three-dimensional structure of the compensation element in the first embodiment Figure 2 ;

[0044] Figure 7 It is a partial schematic diagram of the lifting device of the electric lifting furniture in the first embodiment.

[0045] Reference numerals:

[0046] 100. A first tubular member;

[0047] 200, second tubular member; 210, first side wall; 220, second side wall; 230, mounting hole; 231, first mounting hole; 232, second mounting hole;

[0048] 300, compensation element; 310, sliding surface; 320, fixing protrusion; 321, first fixing protrusion; 322, second fixing protrusion; 330, hot melt protrusion; 331, first hot melt protrusion; 332, second hot melt protrusion; 340, first base; 341, first guide body; 342, first guide slope; 350, second base; 351, second guide body; 352, second guide slope; 360, connecting body; 370, notch; 380, gap. DETAILED DESCRIPTION

[0049] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not 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" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] Embodiment 1:

[0055] Lifting device for electric lift furniture, such as Figures 1 to 7 As shown, the first tubular component 100, the second tubular component 200 and the compensating element 300 are included. The first tubular component 100 is sleeved on the outside of the second tubular component 200, and the first tubular component 100 and the second tubular component 200 can slide relative to each other in the axial direction to achieve telescoping. The compensating element 300 is arranged between the first tubular component 100 and the second tubular component 200 to compensate for the gap between the inner wall of the first tubular component 100 and the outer wall of the second tubular component 200. The compensating element 300 has an inner side arranged facing the second tubular component 200 and an outer side arranged facing the first tubular component 100. The inner side of the compensating element 300 is fixed on the second tubular component 200. A sliding surface 310 is arranged on the outer side of the compensating element 300. The sliding surface 310 contacts the inner surface of the first tubular component 100. When the first tubular component 100 and the second tubular component 200 slide relative to each other in the axial direction, the sliding surface 310 slides axially on the inner surface of the first tubular component 100.

[0056] A fixing protrusion 320 and a hot-melt protrusion 330 are provided on the inner side of the compensation element 300, and a mounting hole 230 penetrating the wall of the second tubular component 200 is provided. During installation, the fixing protrusion 320 is inserted into the mounting hole 230 so that the compensation element 300 is attached to the outer side of the second tubular component 200. At this time, the hot-melt protrusion 330 abuts against the outer side of the second tubular component 200. Because during the installation process, the compensation element 300 extends along the circumference of the second tubular component 200, the outer side of the second tubular component 200 is forced to The compensating element 300 is deformed to present an outward bending posture, that is, the compensating element 300 is bent in a direction away from the second tubular component 200 to open so as to adapt to the local circumferential contour of the second tubular component 200. The outward-bent compensating element 300 is reset in a direction of clamping the second tubular component 200 under the action of its own elastic force to clamp the outer peripheral side of the second tubular component 200, so that the compensating element 300 hugs the second tubular component 200 to keep the compensating element 300 stably installed on the second tubular component 200. After the compensation element 300 is installed, the second tubular component 200 is heated, and the hot-melt protrusion 330 attached to the outer surface of the second tubular component 200 is melted by the high-temperature second tubular component 200. Then, the first tubular component 100 is sleeved on the outer side of the second tubular component 200 so that the sliding surface 310 of the compensation element 300 is against the inner surface of the first tubular component 100. During the assembly process of the first tubular component 100 and the second tubular component 200, the first tubular component 100 presses the compensation element 300 toward the second tubular component 200 by abutting against the sliding surface 310 of the compensation element 300. The melted hot-melt protrusion 330 is subjected to the first The extrusion of the tubular component 100 and the second tubular component 200 causes plastic deformation to the space around them, so as to reduce the length between the end where the hot melt protrusion 330 is installed on the compensation element 300 and the end away from the compensation element 300, so that the inner wall of the first tubular component 100 abuts against the sliding surface 310, while the second tubular component 200 abuts against the hot melt protrusion 330, ensuring that the compensation element 300 accurately fills the gap between the first tubular component 100 and the second tubular component 200, so that the inner side of the compensation element 300 presents a shape corresponding to the outer surface of the second tubular component 200, and increases the contact area between the second tubular component 200 and the compensation element 300. When heating the second tubular component 200, the second tubular component 200 can be heated as a whole, or only the corresponding installation position of the compensation element 300 on the second tubular component 200 can be heated.

[0057] Of course, it is understandable that the lifting device can be a lifting structure formed by two sections of pipes, or a lifting structure formed by multiple sections (three or more sections) of pipes. If the lifting device is a lifting structure formed by multiple sections of pipes, the first tubular component 100 and the second tubular component 200 in this embodiment can be any two adjacent and socketed pipes, that is, a compensation element 300 is provided between any two adjacent and socketed pipes to compensate for the gap between the two adjacent pipes.

[0058] The utility model arranges the compensating element 300 between the first tubular component 100 and the second tubular component 200 to have a structure with a fixing protrusion 320, so that during installation, the compensating element 300 can be inserted into the mounting hole 230 on the second tubular component 200 through the fixing protrusion 320 to achieve rapid positioning and installation on the second tubular component 200, thereby reducing the difficulty of assembly. At the same time, the plug-in fixing protrusion 320 and the mounting hole 230 can limit the compensating element 300 in the axial and circumferential directions. By setting the compensation element 300 as a deformable structure, during the process of installing the compensation element 300 on the second tubular component 200, the outer side surface of the second tubular component 200 can force the compensation element 300 to deform to present an outward bending posture, and the outward-expanding compensation element 300 is reset in the direction of clamping the second tubular component 200 under the action of its own elastic force, so as to clamp the second tubular component 200 and keep the compensation element 300 firmly installed on the second tubular component 200, and avoid the compensation element 300 from being disengaged from the second tubular component 200 along the radial direction of the second tubular component 200, thereby ensuring the stable insertion of the fixing protrusion 320 and the mounting hole 230, and avoiding the compensation element 300 being pushed by the first tubular component 100 when the first tubular component 100 is subsequently sleeved and axially or circumferentially moving on the outer surface of the second tubular component 200, so as to stably compensate for the gap between the first tubular component 100 and the second tubular component 200, and prevent the two from shaking during the lifting process.Because the inner side of the compensation element 300 is provided with a hot-melt protrusion 330 that abuts against the second tubular component 200, the second tubular component 200 is heated before the first tubular component 100 is sleeved. The high-temperature second tubular component 200 can melt the hot-melt protrusion 330 attached to the outer surface of the second tubular component 200. At this time, the first tubular component 100 is sleeved on the outer side of the second tubular component 200. The first tubular component 100 can push the compensation element 300 toward the second tubular component 200, so that the hot-melt protrusion 330 that is melted by heat is squeezed into the space around it and plastically deforms, so that the inner side of the compensation element 300 presents a shape corresponding to the outer surface of the second tubular component 200, thereby increasing the contact area between the second tubular component 200 and the compensation element 300, and improving the contact area between the second tubular component 200 and the compensation element 300. 0, and at the same time, by melting and extruding the hot-melt protrusion 330, the length between the end of the hot-melt protrusion 330 away from the compensation element 300 and the end installed on the compensation element 300 can be reduced, so that the inner wall of the first tubular component 100 abuts against the sliding surface 310 while the second tubular component 200 abuts against the hot-melt protrusion 330. By reducing the overall thickness of the hot-melt protrusion 330 and the compensation element 300, it is ensured that the compensation element 300 accurately fills the gap between the first tubular component 100 and the second tubular component 200, and there is no need to prepare compensation elements 300 of different sizes according to the different gaps between the first tubular component 100 and the second tubular component 200, nor is there any need to make multiple attempts to install between the first tubular component 100 and the second tubular component 200, which greatly reduces the difficulty of assembly, improves the assembly efficiency, and reduces the production cost.

[0059] The second tubular component 200 can be a tube with a polygonal (triangular, quadrilateral, pentagonal, etc.) axial cross-section. Preferably, in this embodiment, the second tubular component 200 is a square tube, and the square tube has adjacent first side walls 210 and second side walls 220, the first side walls 210 and the second side walls 220 are connected, and the angle between the first side walls 210 and the second side walls 220 is α, and the compensation element 300 includes a first substrate 340 and a second substrate 350, the first substrate 340 and the second substrate 350 are connected, and the angle between the first substrate 340 and the second substrate 350 is β. When the compensation element 300 is not installed on the second tubular component 200, β<α. During the installation of the compensation element 300 on the second tubular component 200, the first substrate 340 moves closer to the first side wall 210, and at the same time, the second substrate 350 moves closer to the second side wall 220. However, because the angle between the first substrate 340 and the second substrate 350 is smaller than the angle between the first side wall 210 and the second side wall 220, during the installation process, the first side wall 210 pushes the first substrate 340, and the second side wall 220 pushes the second substrate 350 to open the compensation element 300. As a result, when the compensation element 300 is installed on the second tubular component 200, the first substrate 340 abuts against and hugs the outer surface of the first side wall 210, and the second substrate 350 abuts against and hugs the outer surface of the second side wall 220, and the fitting effect is better.

[0060] like Figure 4 and Figure 5 As shown, the compensation element 300 also includes a connector 360, which is connected between the first substrate 340 and the second substrate 350. The connector 360 is curved in an arc shape, so that during the installation process of the compensation element 300 and the second tubular component 200, the bending deformation of the compensation element 300 will be concentrated on the connector 360, so that the first substrate 340 and the second substrate 350 are separated or brought closer. Compared with the angle formed by the direct connection between the first substrate 340 and the second substrate 350, the arc-shaped connector 360 is more convenient for the deformation and expansion of the compensation element 300, avoiding the fracture of the connection between the first substrate 340 and the second substrate 350, thereby extending the service life of the compensation element 300. Figure 2 and Figure 4As shown, the second tubular component 200 has a corner connecting the first side wall 210 and the second side wall 220. The compensating element 300 installed on the second tubular component 200 is located at the corner of the second tubular component 200. The connecting body 360 corresponds to the corner. When the first tubular component 100 and the second tubular component 200 are assembled, a certain gap 380 is maintained between the connecting body 360 and the corner, that is, during the installation process, the gap 380 always exists. The compensating element 300 can be squeezed by the first tubular component 100 and move toward the gap 380 to get closer to the second tubular component 200. At the same time, the compensating element 300 has a better clamping effect on the second tubular component 200 and a more stable installation. When the first tubular component 100 is sleeved, the gap can also provide a deformation space for the heat-melted hot-melt protrusion 330 to prevent the heat-melted hot-melt protrusion 330 from overflowing from between the compensating element 300 and the second tubular component 200.

[0061] In this embodiment, if Figure 5As shown, the compensation element 300 is provided with two fixing protrusions 320, and the two fixing protrusions 320 are respectively a first fixing protrusion 321 and a second fixing protrusion 322. The first fixing protrusion 321 is arranged on the inner side of the first base 340, and the second fixing protrusion 322 is arranged on the inner side of the second base 350. The first side wall 210 of the second tubular component 200 is provided with a first mounting hole 231, and the second side wall 220 is provided with a second mounting hole 232. When the compensation element 300 is installed on the second tubular component 200, the first fixing protrusion 321 is inserted into the first mounting hole 231, and the second fixing protrusion 322 is inserted into the second mounting hole 232. The first base 340 abuts against the first side wall 210, and the second base 350 abuts against the second side wall 220, so that the first base 340 and the second base 350 clamp the second tubular component 200 together. The provision of the two fixing protrusions 320 enables the second tubular component 200 to be installed and positioned on the first base 340 and the second base 350 respectively through the two mounting holes 230 on the two adjacent side walls, thereby reducing the difficulty of assembly and at the same time having a better limiting effect on the compensation element 300, thereby preventing the compensation element 300 from shaking on the surface of the second tubular component 200 and ensuring the stable operation of the compensation element 300. A plurality of hot-melt protrusions 330 are distributed on the inner side of the first substrate 340 and the second substrate 350. The hot-melt protrusions 330 on the inner side of the first substrate 340 are the first hot-melt protrusions 331, and the hot-melt protrusions 330 on the inner side of the second substrate 350 are the second hot-melt protrusions 332. When the second tubular component 200 is heated, the first hot-melt protrusions 331 are plastically deformed by the heat and present a shape corresponding to the outer surface of the first side wall 210, so as to fit the outer surface of the first side wall 210; the second hot-melt protrusions 332 are plastically deformed by the heat and present a shape corresponding to the outer surface of the second side wall 220, so as to fit the outer surface of the second side wall 220, so that the inner side of the compensation element 300 and the outer side wall of the second tubular component 200 fit better, thereby making the compensation element 300 better at compensating the gap between the first tubular component 100 and the second tubular component 200.

[0062] The two longitudinal ends (i.e., the upper and lower ends) of the first substrate 340 are bent toward the inner side of the compensation element 300 to form a first guide body 341, and the two longitudinal ends (i.e., the upper and lower ends) of the second substrate 350 are bent toward the inner side of the compensation element 300 to form a second guide body 351. When the compensation element 300 is installed on the second tubular component 200, the first guide body 341 and the second guide body 351 abut against the second tubular component 200, and the second tubular component 200 forces the first guide body 341 and the second guide body 351 to deform outwardly so that the first substrate 340 and the second substrate 350 maintain a force state of being retracted inward. When the first tubular member 100 and the second tubular member 200 are installed, at the initial stage of installation, when the first tubular member 100 abuts against the first guide body 341 and the second guide body 351 at one end of the compensation element 300, the abutment between the first guide body 341 and the second guide body 351 and the second tubular member 200 can prevent the other end of the compensation element 300 from being excessively lifted, thereby ensuring the stable installation of the compensation element 300. The first guide body 341 increases the deformability of the first base 340, and the second guide body 351 increases the deformability of the second base 350, so that the first base 340 and the second base 350 can respectively enhance the clamping effect on the second tubular member 200 through deformation, thereby making the clamping effect of the compensation element 300 on the second tubular member 200 better, preventing the compensation element 300 from moving on the second tubular member 200, and ensuring the stable installation of the compensation element 300 on the second tubular member 200. Of course, it can be understood that the above-mentioned embodiment is only a preferred embodiment of this embodiment, so that the upper and lower ends of the first substrate 340 and the second substrate 350 are subjected to more uniform force. In this embodiment, only one of the longitudinal ends of the first substrate 340 can be set to be bent toward the inner side of the compensation element 300, and one of the longitudinal ends of the second substrate 350 can be set to be bent toward the inner side of the compensation element 300, so as to further clamp the second tubular component 200 through the bending deformation of the first substrate 340 and the second substrate 350.

[0063] like Figure 6As shown, the outer side of the first guide body 341 forms a first guide bevel 342 that transitions to the outer side surface of the first base 340, and the angle between the first guide bevel 342 and the sliding surface 310 is greater than 180 degrees. The outer side of the second guide body 351 forms a second guide bevel 352 that transitions to the outer side surface of the second base 350, and the angle between the second guide bevel 352 and the sliding surface 310 is greater than 180 degrees. When installing the first tubular component 100 and the second tubular component 200, the first guide bevel 342 and the second guide bevel 352 can guide the end of the first tubular component 100 to guide the first tubular component 100 and the second tubular component 200 to be smoothly connected, without the need to accurately align the first tubular component 100 and the second tubular component 200, thereby reducing the difficulty of assembly.

[0064] In this embodiment, the first guide body 341 and the second guide body 351 on the same side of the same compensation element 300 are separated from each other, that is, recesses 370 located between the first guide body 341 and the second guide body 351 are respectively provided at the upper and lower ends of the connecting body 360, so that the first guide body 341 at the top of the first base 340 and the second guide body 351 at the top of the second base 350 are separated from each other, and the first guide body 341 at the bottom of the first base 340 and the second guide body 351 at the bottom of the second base 350 are separated from each other, so that the deformation of the first guide body 341 and the second guide body 351 do not affect each other, thereby ensuring the clamping effect of the first base 340 and the second base 350 on the second tubular component 200.

[0065] like Figure 5As shown, in the present embodiment, the hot melt protrusion 330 gradually shrinks from its root (the end connected to the compensation element 300) to the free end (the end away from the compensation element 300) so that the cross-section of the hot melt protrusion 330 is triangular or trapezoidal, that is, the amount of material used in the end where the hot melt protrusion 330 abuts against the second tubular component 200 is reduced. When the first tubular component 100 is sleeved on the outside of the second tubular component 200, the second tubular component 200 can melt and squeeze the end of the hot melt protrusion 330 faster, so that the hot melt protrusion 330 can be deformed quickly, the melting process is fast and controllable, and the hot melt protrusion 330 can better cooperate with the outer side surface of the second tubular component 200 to adapt to the outer contour of the second tubular component 200. Preferably, a plurality of hot melt protrusions 330 are dispersedly distributed on the inner side of the compensation element 300, and there is a certain gap between any two adjacent hot melt protrusions 330. When the hot melt protrusions 330 are heated and plastically deformed, the melted part will diffuse toward the peripheral side, that is, the deformed parts of the multiple hot melt protrusions 330 will diffuse toward the gaps between each other, filling the gap between the inner side of the compensation element 300 and the outer side wall of the second tubular component 200 to increase the contact surface, while preventing the deformed part of the hot melt protrusion 330 from overflowing between the compensation element 300 and the second tubular component 200, which is more beautiful. The hot melt protrusions 330 have various shapes, and can be in the shape of convex points, with multiple convex point-shaped hot melt protrusions 330 distributed in an array on the inner side of the compensation element 300; can be in the shape of ribs, with multiple rib-shaped hot melt protrusions 330 arranged in parallel; can also be in the shape of blocks, etc.

[0066] The hot melt protrusion 330 and the compensation element 300 can be integrally formed with the same material, or can be made of two materials. In order to avoid the compensation element 300 and the hot melt protrusion 330 from being hot-melt deformed together, this embodiment preferably uses two different materials to make the hot melt protrusion 330 and the compensation element 300. The melting point of the material used for the hot melt protrusion 330 is lower than the melting point of the material used for the compensation element 300 and the fixed protrusion 320, so that when the end of the hot melt protrusion 330 is heated and hot-melt deformed, the compensation element 300 and the fixed protrusion 320 with a higher melting point will not melt, thereby preventing the compensation element 300 and the fixed protrusion 320 from being deformed uncontrollably, thereby ensuring that the compensation element 300 stably compensates for the gap between the first tubular component 100 and the second tubular component 200.

[0067] like Figure 3 As shown, at least two rows of compensation elements 300 are arranged between the first tubular component 100 and the second tubular component 200, and each row is provided with a plurality of compensation elements 300. Figure 2As shown, a plurality of compensation elements 300 are respectively arranged at each corner of the square tube, and a plurality of rows of compensation elements 300 are spaced apart along the axial direction of the second tubular component 200. The compensation elements 300 are supported at multiple points in the axial direction, so that the compensation elements 300 between the first tubular component 100 and the second tubular component 200 have a better supporting effect on the first tubular component 100 and the second tubular component 200, thereby preventing the first tubular component 100 and the second tubular component 200 from shaking during the lifting process.

[0068] Embodiment 2:

[0069] The difference between this embodiment and the first embodiment is that, in this embodiment, the second tubular component is a circular tube, and the compensation element is arranged to be arc-shaped. When the compensation element is not installed on the second tubular component, the curvature of the compensation element is greater than the curvature of the outer surface of the second tubular component, so that the installed compensation element holds the second tubular component tightly, which has a good limiting effect on the compensation element.

[0070] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. The lifting device of electric lifting furniture includes: a first tubular member; as well as, A second tubular component, nested in the first tubular component and axially slidable relative to the first tubular component; as well as, A compensation element, disposed between the first tubular component and the second tubular component, for compensating for a gap therebetween; It is characterized in that the compensation element has an inner side facing the second tubular component and an outer side facing the first tubular component, the outer side of the compensation element is provided with a sliding surface contacting the inner surface of the first tubular component, the inner side of the compensation element is provided with a fixing protrusion and a hot-melt protrusion, and the second tubular component is provided with a mounting hole, the fixing protrusion is inserted into the mounting hole so that the compensation element is attached to the outer side surface of the second tubular component, and the second tubular component forces the compensation element to bend outward to adapt to the local circumferential contour of the second tubular component, thereby keeping the fixing protrusion clamping the second tubular component, and the hot-melt protrusion is plastically deformed by heat to present a shape corresponding to the outer surface of the second tubular component.

2. The lifting device for electric lifting furniture according to claim 1, characterized in that: The second tubular component has a first side wall and a second side wall connected at an angle α, and the compensation element includes a first base and a second base connected at an angle β, the first base is attached to the first side wall, and the second base is attached to the second side wall. When the compensation element is not installed, β<α.

3. The lifting device for electric lifting furniture according to claim 2, characterized in that: The compensation element comprises a connecting body connected between a first substrate and a second substrate, wherein the connecting body is in an arc-shaped bending structure, so that the bending deformation of the compensation element is concentrated on the connecting body.

4. The lifting device for electric lifting furniture according to claim 3, characterized in that: The second tubular member has a corner connecting the first side wall and the second side wall, and the connecting body corresponds to the corner with a gap therebetween.

5. The lifting device for electric lifting furniture according to claim 2, characterized in that: A first fixing protrusion is provided on the inner side of the first base, a second fixing protrusion is provided on the inner side of the second base, the first side wall has a first mounting hole, the second side wall has a second mounting hole, the first fixing protrusion is inserted into the first mounting hole and clamps the first side wall, and the second fixing protrusion is inserted into the second mounting hole and clamps the second side wall.

6. The lifting device for electric lifting furniture according to claim 2, characterized in that: A first hot-melt protrusion is provided on the inner side of the first substrate. The first hot-melt protrusion undergoes plastic deformation when heated and presents a shape corresponding to the outer surface of the first side wall. A second hot-melt protrusion is provided on the inner side of the second substrate. The second hot-melt protrusion undergoes plastic deformation when heated and presents a shape corresponding to the outer surface of the second side wall.

7. The lifting device for electric lifting furniture according to claim 2, characterized in that: At least one longitudinal end of the first substrate is bent inwardly to form a first guide body, and at least one longitudinal end of the second substrate is bent inwardly to form a second guide body.

8. The lifting device for electric lifting furniture according to claim 7, characterized in that: The two longitudinal ends of the first substrate are bent inwardly to form a first guide body, and the two longitudinal ends of the second substrate are bent inwardly to form a second guide body. The first guide body and the second guide body on the same side of the compensation element are separated from each other.

9. The lifting device for electric lifting furniture according to claim 7, characterized in that: The outer side of the first guide body forms a first guide slope transitioning to the outer side of the first base body, and the outer side of the second guide body forms a second guide slope transitioning to the outer side of the second base body.

10. The lifting device for electric lifting furniture according to claim 1, characterized in that: The hot-melt protrusion gradually shrinks from its root toward the free end.

11. The lifting device for electric lifting furniture according to claim 1, characterized in that: The second tubular component is a circular tube, the compensation element is arranged in an arc shape, and the curvature of the compensation element when not installed is greater than the curvature of the outer surface of the second tubular component.

12. The lifting device of electric lifting furniture according to claim 1, characterized in that: A plurality of hot-melt protrusions are dispersedly distributed on the inner side of the compensation element, and the plurality of hot-melt protrusions diffuse toward the gaps between each other when they are plastically deformed by heat.

13. The lifting device of electric lifting furniture according to claim 1, characterized in that: The hot-melt protrusion is in the shape of a convex point, a rib, or a block.

14. The lifting device for electric lifting furniture according to claim 1, characterized in that: The heat-melting protrusion has a lower melting point than the compensation element and the fixing protrusion.

15. The lifting device of electric lifting furniture according to claim 1, characterized in that: At least two rows of compensation elements are arranged between the first tubular component and the second tubular component at intervals along the axial direction.

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