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 compensation element, the compensation element comprises a first compensation element and a second compensation element, a clamping groove is arranged on the inner wall of the first tubular part, the first compensation element comprises a support ring, and the support ring is arranged on the inner wall of the second tubular part. The supporting ring is provided with an elastic piece and a receding hole used for receding the elastic piece during installation, one end of the elastic piece is connected to the inner wall of the receding hole, and the other end of the elastic piece extends into the clamping groove to be connected with the clamping groove in a clamped mode. According to the utility model, the first compensation element is arranged to be of an annular structure, and the supporting ring is provided with the elastic sheet and the avoiding hole used for avoiding the elastic sheet, so that during installation, the elastic sheet can be avoided through the avoiding hole in the first compensation element, and an avoiding hole site does not need to be formed in the second tubular part to reserve a deformation space for the elastic sheet; and the machining difficulty and the machining precision of the second tubular part are reduced.

Description

Technical Field

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

[0002] At present, the lifting devices on the market usually have two or more nested tubular structures, and the tubular structures move relative to each other axially to achieve lifting. Due to processing errors and other reasons, there is usually a certain gap between the nested tubular structures, and a compensation element is needed to fill it to avoid shaking when the tubular structures move relative to each other.

[0003] The existing compensation elements usually have buckling points designed to bend outwardly from the outer tube. Therefore, it is necessary to reserve avoidance holes on the inner tube to avoid the buckling points that bend inwardly from the outer tube during installation, so as to provide a deformation space for the buckling points through the inner tube. The setting of the avoidance holes increases the processing difficulty of the inner tube, and it is also necessary to align the avoidance holes with the buckling points during installation, which also makes the assembly between the inner tube, the outer tube and the compensation element more difficult and reduces the assembly efficiency. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a lifting device for an electric lifting furniture to solve the problem of opening avoidance holes on the inner tube to avoid the compensation element.

[0005] To solve the above technical problem, the utility model adopts the following technical scheme: A lifting device for an electric lifting furniture, comprising: a first tubular member; and a second tubular member nested in the first tubular member and axially slidable relative thereto; and a compensation element disposed between the first tubular member and the second tubular member for compensating the gap therebetween; the compensation element includes a first compensation element installed at the end of the first tubular member and a second compensation element installed on the outer side wall of the second tubular member. A clamping groove is provided on the inner wall of the first tubular member. The first compensation element includes a support ring located between the first tubular member and the second tubular member. A spring piece and an avoidance hole for avoiding the spring piece during installation are provided on the support ring. One end of the spring piece is connected to the inner wall of the avoidance hole, and the other end extends into the clamping groove to be clamped with the clamping groove. The technical scheme has the following technical effects:

[0006] When installing the first tubular component, the second tubular component, the first compensation element, and the second compensation element of the present utility model, it is necessary to first sleeved the first compensation element on the outer wall of the second tubular component, and install the second compensation element on the outer wall of the second tubular component. Then, sleeve the first tubular component outside the second tubular component. Since there are elastic pieces and avoidance holes for avoiding the elastic pieces provided on the support ring, during the sleeving process, the first tubular component touches and squeezes the elastic pieces towards the support ring, causing the elastic pieces to elastically deform towards the avoidance holes. The elastic pieces enter the avoidance holes to form an avoidance for the inner wall of the first tubular component until the card slots are aligned with the elastic pieces. The elastic pieces that are no longer squeezed by the first tubular component reset to protrude from the outer wall of the support ring under the action of the elastic force and extend into the card slots to be engaged with the card slots. At this time, the first tubular component and the first compensation element are installed in place, and the first compensation element is fixed at the end of the first tubular component, and the installation ring is located between the first tubular component and the second tubular component. During installation, the elastic pieces can be avoided through the avoidance holes on the first compensation element, without the need to open holes at the positions of the elastic pieces on the second tubular component to reserve space for the deformation of the elastic pieces, reducing the processing difficulty and processing accuracy of the second tubular component. During installation, there is also no need to precisely align the second tubular component and the first compensation element, reducing the assembly difficulty and improving the assembly efficiency.

[0007] In the lifting device of the above-mentioned electric lifting furniture, the support ring includes 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 avoidance holes and the elastic pieces are arranged on the extension plates. By providing the extension plates, while reducing the overall space occupied by the support ring, a sufficiently large installation position is provided for the avoidance holes and the elastic pieces, so that the elastic pieces can be stably connected to the first tubular component. Preferably, the elastic pieces and the support ring are of an integral structure to reduce the production and processing difficulty.

[0008] In the lifting device of the above-mentioned electric lifting furniture, a guiding surface is inclinedly provided at one end of the extension plate away from the ring body, and the guiding surface is arranged towards the inner wall of the first tubular component. The guiding surface is arranged away from the second tubular component, which can guide the installation of the end of the first tubular component. During installation, the end of the first tubular component can slide along the guiding surface to quickly cooperate with the first compensation element for installation, improving the assembly speed.

[0009] In the above-mentioned lifting device of electric lifting furniture, the support ring also includes a limiting step protruding from the outer circumference 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 to prevent it from moving toward the middle of the first tubular component with the second tubular component when the second tubular component is retracted into the first tubular component, ensuring that the first compensation element stably fills the gap between the end of the first tubular component and the second tubular component, that is, ensuring that when the second tubular component is raised or lowered, the first tubular component always maintains stable support for the second tubular component through the first compensation element to prevent the second tubular component from shaking.

[0010] In the above-mentioned lifting device of electric lifting furniture, the support ring includes a mounting end close to the end of the first tubular component and a matching end opposite to the mounting end, and the spring piece is installed on the side of the avoidance hole away from the mounting end. When installing the first tubular component, the second tubular component, the first compensation element and the second compensation element, the first tubular component can gradually squeeze the spring piece from one end connected to the support ring to the other end to move the spring piece into the avoidance hole, without the need for other tools, and the assembly is convenient and simple.

[0011] In the above-mentioned lifting device of electric lifting furniture, the angle between the spring piece and the outer wall of the support ring is α, which satisfies α<90°. During installation, even without external force assistance, the spring piece will not be pushed away from the avoidance hole by the first tubular component, ensuring the stable operation of the spring piece.

[0012] In the above-mentioned lifting device of electric lifting furniture, the spring piece and the supporting ring are an integrated structure to reduce the difficulty of production and processing.

[0013] In the above-mentioned lifting device of electric lifting furniture, the length and width of the avoidance hole are respectively greater than the length and width of the spring sheet, and during the installation process of the spring sheet and the first tubular component, when the spring sheet is deformed and extends into the avoidance hole, an avoidance gap is formed between the inner wall of the avoidance hole and the outer peripheral side of the spring sheet, so that the edge of the spring sheet does not contact the inner wall of the avoidance hole, so as to avoid the friction between the inner wall of the avoidance hole and the outer edge of the spring sheet hindering the spring sheet from automatically resetting to engage with the slot, thereby ensuring the stable engagement of the spring sheet and the first tubular component during installation.

[0014] In the above-mentioned lifting device of electric lifting furniture, the second compensation element includes an elastic support plate tightly hugging the outer wall of the second tubular component and a mounting protrusion arranged on the elastic support plate, and the second tubular component is provided with a plug hole, and the mounting protrusion is inserted into the plug hole. The elastic support plate tightly hugs the outer wall of the second tubular component to cooperate with the first compensation element to jointly support the circumference of the second tubular component, and the radial limiting effect is better to prevent the second tubular component from shaking.

[0015] In the lifting device of the above-mentioned electric lifting furniture, the elastic support plate includes a first side plate and a second side plate that respectively hold adjacent two side walls of the second tubular member, and the connection part of the first side plate and the second side plate is aligned with the edge of the corner of the second tubular member. The alignment of the connection part of the first side plate and the second side plate with the edge of the corner of the second tubular member enables the elastic support plate to hold the edges of each corner around the second tubular member, so that the elastic support plate can support the two outer side walls on both sides of the edge of the corner of the second tubular member at the same time, reducing the amount of the elastic support plate used and improving the limiting effect.

[0016] The features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and drawings. Brief Description of the Drawings

[0017] The present utility model will be further described below in conjunction with the drawings and specific embodiments:

[0018] Figure 1 is the assembly drawing of the lifting device of an electric lifting furniture of the present utility model;

[0019] Figure 2 is the assembly drawing of the second tubular member and the compensation element;

[0020] Figure 3 is the exploded view of the lifting device of an electric lifting furniture of the present utility model;

[0021] Figure 4 is Figure 3 the enlarged view of part A of

[0022] Figure 5 is the three-dimensional view of the first compensation element;

[0023] Figure 6 is the partial cross-sectional view of the lifting device of an electric lifting furniture of the present utility model.

[0024] Reference Signs:

[0025] 100, the first tubular member; 110, the card slot;

[0026] 200, the second tubular member; 210, the jack;

[0027] 300, the first compensation element; 310, the support ring; 311, the ring body; 312, the extension plate; 3121, the guide surface; 313, the limiting step; 314, the installation end; 315, the mating end; 320, the elastic piece; 330, the avoidance hole;

[0028] 400, the second compensation element; 410, the elastic support plate; 411, the first side plate; 412, the second side plate; 420, the installation protrusion. Specific Embodiment

[0029] A lifting device for an electric lifting furniture proposed by the present utility model includes: a first tubular member; and a second tubular member nested in the first tubular member and axially slidable relative thereto; and a compensation element disposed between the first tubular member and the second tubular member for compensating the gap therebetween. The compensation element includes a first compensation element mounted at the end of the first tubular member and a second compensation element mounted on the outer side wall of the second tubular member. A card slot is provided on the inner wall of the first tubular member. The first compensation element includes a support ring located between the first tubular member and the second tubular member. The support ring is provided with elastic pieces and avoidance holes for avoiding the elastic pieces during installation. One end of the elastic piece is connected to the inner wall of the avoidance hole, and the other end extends into the card slot to be engaged with the card slot. By setting the first compensation element into an annular structure and providing elastic pieces and avoidance holes for avoiding the elastic pieces on the support ring, during installation, the elastic pieces can be avoided through the avoidance holes on the first compensation element, without the need to open avoidance hole positions on the second tubular member to align with the positions of the elastic pieces to reserve space for the deformation of the elastic pieces, reducing the processing difficulty and processing accuracy of the second tubular member. During installation, there is also no need for precise alignment between the second tubular member and the first compensation element, reducing the assembly difficulty and improving the assembly efficiency.

[0030] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. 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 present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0033] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] Embodiment 1:

[0036] A lifting device for an electric lifting furniture, as Figures 1 to 6As shown in the figure, it includes a first tubular member 100, a second tubular member 200 and a compensation element. The first tubular member 100 is sleeved outside the second tubular member 200, and relative axial sliding can occur between the first tubular member 100 and the second tubular member 200 to realize the lifting of the lifting device. The compensation element is arranged between the first tubular member 100 and the second tubular member 200 to compensate for the gap between the inner wall of the first tubular member 100 and the outer wall of the second tubular member 200. The compensation element includes a first compensation element 300 and a second compensation element 400. The first compensation element 300 is installed at the end of the first tubular member 100, and the second compensation element 400 is installed on the outer wall of the second tubular member 200. When relative axial sliding occurs between the first tubular member 100 and the second tubular member 200, the first compensation element 300 and the second compensation element 400 are always between the first tubular member 100 and the second tubular member 200 to fill the gap therebetween and prevent the two from shaking axially. A clamping groove 110 is provided on the inner wall of the first tubular member 100. The first compensation element 300 includes a support ring 310. A spring piece 320 is provided on the support ring 310, and an avoidance hole 330 is also provided. One end of the spring piece 320 is connected to the inner wall of the avoidance hole 330, and the other end deviates outward from the support ring 310 to protrude from the outer wall of the support ring 310. Of course, it can be understood that in this embodiment, multiple tubular members and multiple compensation elements can also be provided. Among any two adjacent tubular members, the relatively outer tubular member is the first tubular member 100, and the relatively inner tubular member is the second tubular member 200.

[0037] To avoid the first compensation element 300 on the first tubular member 100 from hindering the second compensation element 400 on the second tubular member 200 when the first tubular member 100 and the second tubular member 200 are sleeved, when the first tubular member 100, the second tubular member 200, the first compensation element 300 and the second compensation element 400 of the present utility model are installed, as Figure 2As shown in the figure, it is necessary to first sleeved the first compensating element 300 on the outer sidewall of the second tubular member 200, and install the second compensating element 400 on the outer sidewall of the second tubular member 200. Then, sleeve the first tubular member 100 on the outside of the second tubular member 200. Since there are elastic pieces 320 and avoidance holes 330 for avoiding the elastic pieces 320 provided on the support ring 310, during the sleeving process, the first tubular member 100 touches and squeezes the elastic piece 320 towards the support ring 310, so that the elastic piece 320 elastically deforms towards the avoidance hole 330, and the elastic piece 320 enters the avoidance hole 330 to form an avoidance for the inner wall of the first tubular member 100 until the card slot 110 is aligned with the elastic piece 320. The elastic piece 320 that is no longer squeezed by the first tubular member 100 resets to protrude from the outer sidewall of the support ring 310 under the action of elastic force and extends into the card slot 110 to be engaged with the card slot 110. At this time, the first tubular member 100 and the first compensating element 300 are installed in place, the first compensating element 300 is fixed at the end of the first tubular member 100, and the mounting ring is located between the first tubular member 100 and the second tubular member 200. During installation, the elastic piece 320 can be avoided through the avoidance hole 330 on the first compensating element 300, and there is no need to open a hole at the position of the elastic piece 320 on the second tubular member 200 to reserve a deformation space for the elastic piece 320, reducing the processing difficulty and processing accuracy of the second tubular member 200. During installation, there is also no need to precisely align the second tubular member 200 and the first compensating element 300, reducing the assembly difficulty and improving the assembly efficiency.

[0038] As Figure 3 and Figure 5 shown in the figure, the support ring 310 includes a ring body 311 and a plurality of extension plates 312. The plurality of extension plates 312 are connected to the ring body 311 at intervals and are arranged around the central axis of the support ring 310. The extension plates 312 extend along the axial direction of the ring body 311. Each extension plate 312 is provided with an avoidance hole 330 and an elastic piece 320. By providing the extension plates 312, while reducing the overall space occupied by the support ring 310, a sufficiently large installation position is provided for the avoidance hole 330 and the elastic piece 320, so that the elastic piece 320 can be stably connected to the first tubular member 100. Preferably, the elastic piece 320 and the support ring 310 are of an integral structure to reduce the production and processing difficulty.

[0039] In order to facilitate the rapid insertion of the extension plate 312 into the gap between the first tubular member 100 and the second tubular member 200 during installation, in this embodiment, a guiding surface 3121 is provided at one end of the extension plate 312 away from the ring body 311. The guiding surface 3121 is inclined and faces away from the second tubular member 200, which can guide the installation of the end of the first tubular member 100. During installation, the end of the first tubular member 100 can slide along the guiding surface 3121 to quickly install and cooperate with the first compensation element 300, improving the assembly speed. After the assembly is completed, the guiding surface 3121 faces the inner wall of the first tubular member 100.

[0040] In this embodiment, the support ring 310 further includes an annular limiting step 313. The limiting step 313 is coaxially arranged with the ring body 311 and protrudes from the outer peripheral side of the ring body 311. After the lifting device is assembled, the limiting step 313 abuts against the end of the first tubular member 100 to limit the first compensation element 300, preventing it from moving towards the middle of the first tubular member 100 along with the second tubular member 200 when the second tubular member 200 retracts into the first tubular member 100, ensuring the stable filling of the gap between the end of the first tubular member 100 and the second tubular member 200 by the first compensation element 300. That is, when the second tubular member 200 moves up and down, the first tubular member 100 always maintains stable support for the second tubular member 200 through the first compensation element 300, preventing the second tubular member 200 from shaking.

[0041] The two ends of the support ring 310 are respectively an installation end 314 and a mating end 315. The installation end 314 is the end of the support ring 310 close to the end of the first tubular member 100 (i.e., Figure 6 the lower end of the support ring 310 in the figure), and the mating end 315 is the end of the support ring 310 opposite to the installation end 314 (i.e., Figure 6 the upper end of the support ring 310 in the figure). The elastic piece 320 is installed on one side of the avoidance hole 330 close to the mating end 315. When installing the first tubular member 100, the second tubular member 200, the first compensation element 300, and the second compensation element 400, the first tubular member 100 can gradually squeeze the elastic piece 320 from the end where the elastic piece 320 is connected to the support ring 310 towards the other end, causing the elastic piece 320 to move into the avoidance hole 330 without the need for other tools, making the assembly convenient and simple. As Figure 6 shown, the included angle between the elastic piece 320 and the outer side wall of the support ring 310 is α, satisfying α < 90°. During installation, even without external assistance, the elastic piece 320 will not be pushed away from the avoidance hole 330 by the first tubular member 100, ensuring the stable operation of the elastic piece 320. Preferably, α is 15°.

[0042] In this embodiment, the length and width of the avoidance hole 330 are respectively greater than the length and width of the spring clip 320. When the spring clip 320 is deformed during the installation process to enter the avoidance hole 330 as a whole, an avoidance gap can be formed between the inner wall of the avoidance hole 330 and the outer peripheral side of the spring clip 320, so that the edge of the spring clip 320 does not contact the inner wall of the avoidance hole 330, so as to avoid the friction between the inner wall of the avoidance hole 330 and the outer edge of the spring clip 320 hindering the spring clip 320 from automatically resetting to engage with the slot 110, thereby ensuring the stable engagement of the spring clip 320 with the first tubular component 100 during installation.

[0043] The second compensation element 400 includes an elastic support plate 410 and a mounting protrusion 420 arranged on the elastic support plate 410. The second tubular component 200 is provided with a socket 210, and the mounting protrusion 420 is inserted into the socket 210. Multiple elastic support plates 410 are tightly attached to the outer 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 as to have a better radial limiting effect and prevent the second tubular component 200 from shaking. Preferably, the elastic support plate 410 includes a first side plate 411 and a second side plate 412 connected to the side, the first side plate 411 and the second side plate 412 respectively fit the two adjacent side walls of the second tubular component 200, and the connection between the first side plate 411 and the second side plate 412 is aligned with the edge at the corner of the second tubular component 200. The elastic support plate 410 hugs the edges at each corner around the second tubular component 200, so that the elastic support plate 410 can simultaneously support the two outer walls on both sides of the edge at the corner of the second tubular component 200, thereby reducing the usage of the elastic support plate 410 and improving the limiting effect.

[0044] 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. A lifting device for electric lifting furniture, comprising: a first tubular member; as well as, A second tubular component, nested in the first tubular component and axially slidable relative thereto; as well as, A compensation element is disposed between the first tubular component and the second tubular component to compensate for a gap therebetween; It is characterized in that the compensation element includes a first compensation element installed at the end of the first tubular component and a second compensation element installed on the outer wall of the second tubular component, a slot is provided on the inner wall of the first tubular component, the first compensation element includes a support ring located between the first tubular component and the second tubular component, the support ring is provided with a spring sheet and an avoidance hole for avoiding the spring sheet during installation, one end of the spring sheet is connected to the inner wall of the avoidance hole, and the other end extends into the slot to be engaged with the slot.

2. The lifting device of an electric lifting furniture according to claim 1, characterized in that: 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 avoidance holes and the elastic sheets are arranged on the extension plates.

3. The lifting device of an electric lifting furniture according to claim 2, characterized in that: A guide surface is obliquely provided at one end of the extension plate away from the ring body, and the guide surface is arranged toward the inner wall of the first tubular component.

4. The lifting device of an electric lifting furniture according to claim 2, wherein: The support ring further includes a limiting step protruding from the outer circumference of the ring body, and the limiting step abuts against the end of the first tubular component.

5. The lifting device of an electric lifting furniture according to claim 1 or 2, characterized in that: The support 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 spring sheet is mounted on a side of the avoidance hole away from the mounting end.

6. The lifting device of an electric lifting furniture according to claim 5, characterized in that: The included angle between the spring sheet and the outer side wall of the support ring is α, which satisfies α<90°.

7. The lifting device of an electric lifting furniture according to claim 5, characterized in that: The spring sheet and the support ring are an integrated structure.

8. The lifting device of an electric lifting furniture according to claim 1, wherein: The length and width of the avoidance hole are respectively greater than the length and width of the spring sheet. During the installation of the spring sheet and the first tubular component, when the spring sheet is deformed and extends into the avoidance hole, an avoidance gap is formed between the inner wall of the avoidance hole and the outer peripheral side of the spring sheet.

9. The lifting device of an electric lifting furniture according to claim 1, characterized in that: The second compensation element includes an elastic support plate tightly hugging the outer side wall of the second tubular component and a mounting protrusion arranged on the elastic support plate. The second tubular component is provided with a plug hole, and the mounting protrusion is inserted into the plug hole.

10. The lifting device of an electric lifting furniture according to claim 9, characterized in that: The elastic support plate includes a first side plate and a second side plate respectively hugging two adjacent side walls of the second tubular component, and the connection between the first side plate and the second side plate is aligned with the edge of the corner of the second tubular component.

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