Lifting device for electrically operated lifting furniture

Abstract

This utility model discloses a lifting device for electrically adjustable furniture, including an inner tube, an outer tube, and a compensating element. The compensating element is disposed between the inner and outer tubes to compensate for the gap between them. A groove is provided on the inner wall of the outer tube. The compensating element includes a support ring at the end of the outer tube and spring pieces fixed at both ends to the support ring. The middle part of the spring piece arches towards the outer tube and engages in the groove, forming a deformation gap on the side of the spring piece facing the inner tube for deformation. This utility model, by setting the compensating element as a support ring with spring pieces and fixing both ends of the spring pieces to the support ring, and using the deformation gap formed by the arching of the spring pieces to reserve space for deformation, eliminates the need to drill additional holes at the alignment position of the inner tube and spring pieces to reserve space for deformation during the installation of the compensating element. This reduces the processing difficulty and accuracy of the inner tube, and avoids reducing the strength of the inner tube due to excessive holes.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment, and specifically relates to a lifting device for electric lifting furniture. Background Technology

[0002] Currently, most lifting devices on the market have two or more interlocking tubular structures that move relative to each other along the axial direction to achieve lifting. Due to manufacturing errors and other reasons, there is usually a certain gap between the interlocking tubular structures, which needs to be filled by compensating elements to prevent swaying during relative movement of the tubular structures.

[0003] Existing compensation elements typically have snap points that bend towards the outer tube. During installation, the snap points are squeezed and pushed by the outer tube and bend towards the inner tube. Therefore, it is necessary to reserve clearance holes on the inner tube to allow the snap points to be avoided. By reserving clearance holes on the inner tube, the processing difficulty of the inner tube is increased, the strength of the inner tube is reduced, and the service life of the inner tube is shortened. Utility Model Content

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

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a lifting device for electric lifting furniture, comprising an inner tube, an outer tube, and a compensating element. The inner tube is nested within the outer tube and can slide axially relative to the outer tube. The compensating element is disposed between the inner and outer tubes to compensate for the gap between them. A groove is provided on the inner side wall of the outer tube. The compensating element includes a support ring located at the end of the outer tube and spring pieces fixed at both ends to the support ring. The middle part of the spring piece arches towards the outer tube and engages in the groove, so as to form a deformation gap for the spring piece to deform on the side facing the inner tube. This technical solution has the following technical effects:

[0006] To prevent the compensating element on the outer tube from obstructing the installation of other components on the inner tube during the connection of the inner and outer tubes, it is necessary to first connect the inner and outer tubes together, and then install the compensating element between the end of the outer tube and the inner tube. This invention addresses this by setting the compensating element as a support ring with a spring plate, fixing both ends of the spring plate to the support ring, causing the middle of the spring plate to arch outwards towards the support ring, forming a deformation gap on the side of the spring plate facing the central axis of the support ring. When the compensating element is installed between the inner and outer tubes, the support ring extends into the gap between the inner and outer tubes, and the outer tube presses the spring plate against the support ring, causing the spring plate to elastically deform towards the deformation gap, thus avoiding contact with the inner wall of the outer tube. This continues until the slot aligns with the spring plate, at which point the spring plate is no longer compressed by the outer tube. Under the action of elastic force, the spring plate returns to its original position, protruding from the outer wall of the support ring, and extends into the slot to engage with it. At this point, the compensating element is in place, fixing it to the end of the outer tube. By creating a deformation gap through the arching of the spring sheet to allow for its deformation, it is possible to eliminate the need to drill additional holes at the alignment points between the inner tube and the spring sheet when installing the compensation element. This reduces the processing difficulty and accuracy of the inner tube, while also preventing the reduction of its strength due to excessive holes. This ensures the strength of the inner tube, making it less prone to damage and extending its service life.

[0007] In the lifting device of the aforementioned electric lifting furniture, the spring extends horizontally, and its left and right ends are fixed to the support ring. This allows the spring to occupy less space in the vertical direction, and after the spring extends into the slot, it can fully abut against the inner wall of the slot in the axial direction of the outer tube to stably limit the position of the compensating element. Even under large external forces, the spring will not be squeezed radially by the outer tube, ensuring that the compensating element is stably installed between the inner and outer tubes to compensate for the gap between them and preventing radial swaying between the inner and outer tubes.

[0008] In the lifting device of the aforementioned electric lifting furniture, a portion of the sidewall of the support ring is bent and arched towards the slot to form a spring, allowing the deformation gap to pass through the support ring. The integrally formed support ring and spring make the connection between the two ends of the spring and the support ring more robust and reliable, preventing breakage at the connection between the spring and the support ring after the spring deforms and returns to its original position, thus extending the service life of the compensation element.

[0009] In the lifting device of the aforementioned electric lifting furniture, a guide surface is provided on the side of the spring facing the middle of the outer tube, and the guide surface is inclined towards the outer tube. The inclined guide surface can guide the outer tube when it contacts the spring, so that the outer tube can squeeze the spring, allowing the compensating element to be quickly installed and matched with the outer tube, improving the assembly speed and reducing the assembly difficulty between the compensating element and the outer and inner tubes.

[0010] In the lifting device of the aforementioned electric lifting furniture, at least two spring clips are provided on the support ring, and the spacing between any two adjacent spring clips in the circumferential direction of the support ring is the same. This makes the connection between the compensating element and the outer tube tighter, reduces the force on a single spring clip, and at the same time makes the force on the periphery of the compensating element more uniform, thus extending the service life of the compensating element.

[0011] In the lifting device of the aforementioned electric lifting furniture, the slot is an annular slot arranged around the central axis of the outer tube. The annular slot can accommodate any number of spring clips, eliminating the need to align the slot and spring clips axially during installation, thus reducing assembly difficulty and improving assembly efficiency.

[0012] In the lifting device of the aforementioned electric lift furniture, the area of ​​the inner tube wall corresponding to the spring clip is a closed area without any holes. There is no need to create holes in the inner tube to allow the spring clip to pass through, thus avoiding any reduction in the strength of the inner tube due to the presence of holes.

[0013] In the lifting device of the aforementioned electric lifting furniture, both the inner and outer tubes are circular tubes. The inner wall of the outer tube has a guide groove extending axially along its length, and the outer wall of the inner tube has a guide block slidably connected within the guide groove. When the inner and outer tubes experience relative axial displacement, the guide block can slide along the guide groove to circumferentially limit the inner tube, preventing relative rotation between them during lifting and ensuring stable lifting.

[0014] In the lifting device of the aforementioned electric lifting furniture, the support ring includes a support part located between the inner tube and the outer tube, and a positioning part abutting against the end face of the outer tube. The spring is provided on the support part. The positioning part can indicate the assembly in place during the installation process, and can also cooperate with the spring to axially limit the compensation element after the installation is completed, making the installation more stable and reliable.

[0015] In the lifting device of the aforementioned electric lifting furniture, a positioning block is provided on the support part. The positioning block is inserted into the guide groove, and the two sides of the positioning block abut against the inner wall of the guide groove. When the compensating element and the outer tube are assembled in place, the positioning block inserted into the guide groove and the two sides of the positioning block abut against the inner wall of the guide groove provide circumferential limitation for the support ring, preventing relative rotation and wear between the support ring and the outer tube, ensuring stable engagement of the spring and the slot, extending the service life of the compensating element and the outer tube, and at the same time, enhancing the strength of the support ring and reducing the assembly difficulty of the support ring.

[0016] The features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] Figure 1 This is an assembly drawing of a lifting device for an electric lifting furniture according to this utility model;

[0019] Figure 2 This is an exploded view of a lifting device for an electric lifting furniture according to this utility model;

[0020] Figure 3 Assembly drawing of the inner tube and compensating elements;

[0021] Figure 4 A partial sectional view of the outer tube and compensation components in their assembled state;

[0022] Figure 5 A partial sectional view of the outer tube and compensation components in their assembled state;

[0023] Figure 6 A three-dimensional view of the compensation element.

[0024] Figure label:

[0025] 100. Inner tube; 110. Guide block;

[0026] 200, outer tube; 210, slot; 220, guide groove;

[0027] 300. Compensating element; 310. Support ring; 311. Support part; 3111. Positioning block; 312. Positioning part; 320. Spring piece; 321. Guide surface; 330. Deformation gap. Detailed Implementation

[0028] The present invention discloses a lifting device for electric lifting furniture, comprising an inner tube, an outer tube, and a compensating element. The inner tube is nested in the outer tube and can slide axially relative to the outer tube. The compensating element is disposed between the inner tube and the outer tube to compensate for the gap between them. A groove is provided on the inner side wall of the outer tube. The compensating element includes a support ring located at the end of the outer tube and spring pieces fixed at both ends to the support ring. The middle part of the spring piece arches towards the outer tube and is engaged in the groove to form a deformation gap for the spring piece to deform on the side of the spring piece facing the inner tube. To prevent the compensating element on the outer tube from obstructing the installation of other components on the inner tube during the connection of the inner and outer tubes, it is necessary to first connect the inner and outer tubes together, and then install the compensating element between the end of the outer tube and the inner tube. This invention addresses this by setting the compensating element as a support ring with a spring plate, fixing both ends of the spring plate to the support ring. This causes the middle part of the spring plate to arch outwards towards the support ring, forming a deformation gap on the side of the spring plate facing the central axis of the support ring. When the compensating element is installed between the inner and outer tubes, the support ring extends into the gap between the inner and outer tubes, and the outer tube presses against the support ring, causing the spring plate to elastically deform towards the deformation gap, thus avoiding contact with the inner wall of the outer tube. This continues until the slot aligns with the spring plate, at which point the spring plate is no longer compressed by the outer tube. Under the action of elastic force, the spring plate returns to its original position, protruding from the outer wall of the support ring, and extends into the slot to engage with it. At this point, the compensating element is installed in place, fixing it to the end of the outer tube. By creating a deformation gap through the arching of the spring sheet to allow for its deformation, it is possible to eliminate the need to drill additional holes at the alignment points between the inner tube and the spring sheet when installing the compensation element. This reduces the processing difficulty and accuracy of the inner tube, while also preventing the reduction of its strength due to excessive holes. This ensures the strength of the inner tube, making it less prone to damage and extending its service life.

[0029] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0030] In the description of this 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 accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] Example 1:

[0035] A lifting device for electrically operated lifting furniture, such as Figures 1 to 6As shown, the device includes an inner tube 100, an outer tube 200, and a compensating element 300. The outer tube 200 is sleeved on the outside of the inner tube 100, and the outer tube 200 and the inner tube 100 can slide relative to each other in the axial direction to realize the lifting and lowering of the lifting device. The compensating element 300 is disposed between the outer tube 200 and the inner tube 100 to compensate for the gap between the inner wall of the outer tube 200 and the outer wall of the inner tube 100. When the inner tube 100 and the outer tube 200 slide relative to each other in the axial direction, the compensating element 300 is always between the inner tube 100 and the outer tube 200 to fill the gap between them and prevent them from shaking in the axial direction. A slot 210 is provided on the inner wall of the outer tube 200. The compensation element 300 includes a support ring 310 and a spring piece 320. The support ring 310 is located at the end of the outer tube 200. The two ends of the spring piece 320 are fixed on the support ring 310. The middle part of the spring piece 320 arches towards the outer tube 200 and extends into the slot 210 to engage with the slot 210. A deformation gap 330 is formed on the side of the spring piece 320 facing the inner tube 100 to allow the spring piece 320 to deform when the compensation element 300 is installed between the inner tube 100 and the outer tube 200. During installation, the area of ​​the inner tube 100 corresponding to the spring piece 320 is a closed area without holes, that is, there is no need to open holes in the inner tube 100 to avoid the spring piece 320. Of course, it is understood that in other embodiments, three or more tubular components may be nested together, and a compensation element may be provided between two adjacent tubular components. In any two adjacent tubular components, the tubular component on the outer side is the outer tube, and the tubular component on the inner side is the inner tube.

[0036] To prevent the compensating element 300 on the outer tube 200 from obstructing the installation of other components on the inner tube 100 when the inner tube 100 and outer tube 200 are connected, the inner tube 100 and outer tube 200 need to be connected together first, and then the compensating element 300 is installed between the end of the outer tube 200 and the inner tube 100. This invention addresses this by configuring the compensating element 300 as a support ring 310 with a spring piece 320, fixing both ends of the spring piece 320 to the support ring 310, causing the middle part of the spring piece 320 to arch outwards from the support ring 310, and forming a deformation gap 330 on the side of the spring piece 320 facing the central axis of the support ring 310. This allows the compensating element 300 to be installed... When installed between the inner tube 100 and the outer tube 200, the support ring 310 extends into the gap between the inner tube 100 and the outer tube 200. The outer tube 200 presses the spring piece 320 against the support ring 310, so that the spring piece 320 undergoes elastic deformation towards the deformation gap 330 to avoid the inner wall of the outer tube 200. Until the slot 210 is aligned with the spring piece 320, the spring piece 320 is no longer pressed by the outer tube 200. Under the action of elastic force, the spring piece 320 returns to its original position and protrudes from the outer wall of the support ring 310 to extend into the slot 210 and engage with the slot 210. At this time, the compensation element 300 is installed in place so that the compensation element 300 is fixed at the end of the outer tube 200. By arching the spring piece 320 to form a deformation gap 330, space is reserved for the deformation of the spring piece 320. When installing the compensation element 300, it is not necessary to open additional holes at the alignment position of the inner tube 100 and the spring piece 320 to reserve space for the deformation of the spring piece 320. This reduces the processing difficulty and accuracy of the inner tube 100. At the same time, it avoids reducing the strength of the inner tube 100 by opening too many holes, thus ensuring the strength of the inner tube 100, making the inner tube 100 less prone to damage, and extending the service life of the inner tube 100.

[0037] like Figure 4 As shown, in this embodiment, the spring piece 320 extends horizontally, and its left and right ends are fixed to the support ring 310, so that the spring piece 320 occupies a small space in the vertical direction. After the spring piece 320 extends into the slot 210, it can fully abut against the inner wall of the slot 210 in the axial direction of the outer tube 200 to stably limit the position of the compensation element 300. Even if subjected to a large external force, the spring piece 320 will not be squeezed radially by the outer tube 200, ensuring that the compensation element 300 is stably installed between the inner tube 100 and the outer tube 200 to compensate for the gap between them and avoid radial shaking of the inner tube 100 and the outer tube 200.

[0038] In this embodiment, the support ring 310 and the spring piece 320 are integrally formed. The support ring 310 extends into the side wall of one end between the inner tube 100 and the outer tube 200. The middle part is disconnected from the support ring 310 and bent towards the slot 210 to form the spring piece 320 arching towards the slot 210 on the outer tube 200. This allows the deformation gap 330 to pass through the support ring 310, ensuring that the space of the deformation gap 330 is large enough to provide sufficient space for the deformation of the spring piece 320. At the same time, compared with the fixed connection achieved by later assembly, the integrally formed support ring 310 and spring piece 320 make the connection between the two ends of the spring piece 320 and the support ring 310 more firm and reliable. After the spring piece 320 deforms and resets, it prevents the connection between the spring piece 320 and the support ring 310 from breaking, thus extending the service life of the compensation element 300.

[0039] like Figure 5 and Figure 6 As shown, in this embodiment, the spring piece 320 has a guide surface 321 on the side facing the middle of the outer tube 200. The guide surface 321 is inclined. During the process of the support ring 310 extending between the outer tube 200 and the inner tube 100, the outer tube 200 first contacts the guide surface 321 of the spring piece 320 and slides along the inclined guide surface 321 until it abuts against the outer side surface of the spring piece 320. Then, the spring piece 320 is pushed to deform along the radial deformation gap 330 so that the spring piece 320 avoids the inner side wall of the inner tube 100 until it is installed in place. The guide surface 321 is inclined towards the outer tube 200. The inclined guide surface 321 can guide the outer tube 200 when it contacts the spring piece 320 so that the outer tube 200 squeezes the spring piece 320, so that the compensation element 300 can be quickly installed and matched with the outer tube 200, improving the assembly speed and reducing the assembly difficulty between the compensation element 300 and the outer tube 200 and the inner tube 100.

[0040] Preferably, multiple (two or more) spring pieces 320 are provided, and the multiple spring pieces 320 are evenly distributed on the outer periphery of the support ring 310. The spacing between any two adjacent spring pieces 320 in the circumferential direction of the support ring 310 is the same, which makes the connection between the compensation element 300 and the outer tube 200 tighter, reduces the force on a single spring piece 320, and makes the force on the periphery of the compensation element 300 more uniform, thus extending the service life of the compensation element 300. Figure 2 As shown, the slot 210 in this embodiment is an annular slot. The annular slot is arranged around the central axis of the outer tube 200. The annular slot can accommodate any number of spring pieces 320. During installation, it is not necessary to align the slot 210 and the spring pieces 320 one by one in the axial direction, which reduces the assembly difficulty and improves the assembly efficiency.

[0041] In this embodiment, both the inner tube 100 and the outer tube 200 are circular tubes. A guide groove 220 is provided on the inner sidewall of the outer tube 200, and the guide groove 220 extends along the axial direction of the outer tube 200. Figure 3 As shown, a guide block 110 is provided on the outer wall of the inner tube 100. The guide block 110 is fixed on the inner tube 100 and is inserted into the guide groove 220 and slidably connected to the guide groove 220. When the inner tube 100 and the outer tube 200 undergo relative axial displacement, the guide block 110 can slide along the guide groove 220 to limit the inner tube 100 in the circumferential direction, so as to avoid relative rotation between the inner tube 100 and the outer tube 200 during the lifting process and ensure the stable lifting of the lifting device.

[0042] The support ring 310 includes a support portion 311 and a positioning portion 312. The positioning portion 312 is located at the end of the support portion 311. When the compensating element 300 is installed in place, the support portion 311 is located between the inner tube 100 and the outer tube 200, the positioning portion 312 abuts against the end face of the outer tube 200, and the spring piece 320 abuts against the inner wall of the slot 210 opposite to the positioning portion 312 to limit the compensating element 300. The positioning portion 312 can indicate the correct assembly during installation, and can also, after installation, work with the spring piece 320 to axially limit the compensating element 300, making the installation more stable and reliable. To enhance the strength of the support ring 310 and reduce its assembly difficulty, this embodiment may also provide a positioning block 3111 on the support part 311. When the compensation element 300 and the outer tube 200 are assembled in place, the positioning block 3111 is inserted into the guide groove 220. The two sides of the positioning block 3111 abut against the inner sidewall of the guide groove 220, thereby limiting the support ring 310 in the circumferential direction, preventing relative rotation and wear between the support ring 310 and the outer tube 200, ensuring stable engagement between the spring piece 320 and the slot 210, and extending the service life of the compensation element 300 and the outer tube 200.

[0043] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A lifting device for electrically adjustable furniture, comprising an inner tube, an outer tube, and a compensating element, wherein the inner tube is nested within the outer tube and is axially slidable relative to the outer tube, and the compensating element is disposed between the inner tube and the outer tube to compensate for the gap between them, characterized in that: The inner wall of the outer tube is provided with a slot. The compensation element includes a support ring located at the end of the outer tube and spring pieces fixed at both ends to the support ring. The middle part of the spring piece arches towards the outer tube and is engaged in the slot to form a deformation gap for the spring piece to deform on the side of the spring piece facing the inner tube.

2. The lifting device for electrically adjustable furniture according to claim 1, characterized in that: The spring extends horizontally, and its left and right ends are fixed to the support ring.

3. The lifting device for electrically operated lifting furniture according to claim 2, characterized in that: The spring piece is formed by bending and arching a portion of the sidewall of the support ring towards the slot, so that the deformation gap passes through the support ring.

4. The lifting device for electrically adjustable furniture according to claim 1, characterized in that: The spring sheet has a guide surface on one side facing the middle of the outer tube, and the guide surface is inclined towards the outer tube.

5. The lifting device for electrically operated lifting furniture according to claim 1, characterized in that: The support ring is provided with at least two spring pieces, and the spacing between any two adjacent spring pieces in the circumferential direction of the support ring is the same.

6. The lifting device for electrically operated lifting furniture according to claim 5, characterized in that: The slot is an annular slot arranged around the central axis of the outer tube.

7. The lifting device for electrically operated lifting furniture according to claim 1, characterized in that: The area on the inner tube wall corresponding to the spring piece is a closed area without any openings.

8. The lifting device for electrically operated lifting furniture according to claim 1, characterized in that: Both the inner tube and the outer tube are circular tubes. The inner sidewall of the outer tube is provided with a guide groove extending along the axial direction of the outer tube, and the outer sidewall of the inner tube is provided with a guide block, which is slidably connected in the guide groove.

9. The lifting device for electrically adjustable furniture according to claim 8, characterized in that: The support ring includes a support portion located between the inner tube and the outer tube, and a positioning portion abutting against the end face of the outer tube, with the spring piece disposed on the support portion.

10. The lifting device for electrically operated lifting furniture according to claim 9, characterized in that: The support is provided with a positioning block, which is inserted into the guide groove, and the two sides of the positioning block abut against the inner sidewall of the guide groove.

Images