Electric lift table stand and electric lift table

Abstract

The application provides an electric lifting table support and an electric lifting table, and belongs to the field of smart home. The electric lifting table support comprises a tabletop assembly, a transmission telescopic rod, a driving assembly and two lifting legs; the tabletop assembly comprises an inner cross beam, an outer cross beam and two longitudinal beam supporting arms, one end of the inner cross beam is connected with one longitudinal beam supporting arm, the other end of the inner cross beam is inserted into one end of the outer cross beam, the other end of the outer cross beam is connected with the other longitudinal beam supporting arm; the lifting legs are connected with the longitudinal beam supporting arms; the two ends of the transmission telescopic rod are respectively in transmission connection with the two lifting legs; the driving assembly is used for driving the transmission telescopic rod to rotate, so as to drive the two lifting legs to synchronously lift. Under the action of the transmission telescopic rod, only one driving assembly can transmit power to the two lifting legs, and the transmission telescopic rod can also change the length by telescoping, so that it can be adapted to tabletop panels of different sizes. The electric lifting table support not only can adjust the length, but also has a simple structure, which is conducive to reducing the cost.

Description

Technical Field

[0001] This application relates to the field of smart home, and in particular to an electric height-adjustable desk bracket and an electric height-adjustable desk. Background Technology

[0002] An electric height-adjustable desk is a type of desk whose desktop height can be adjusted as needed. It is convenient to use and widely used in homes, offices, and other places.

[0003] An electric height-adjustable desk consists of a frame and a desktop. The frame can be raised and lowered by a drive mechanism, thus changing the height of the desktop. To facilitate production and reduce operating costs, electric height-adjustable desk frames of the same size can typically accommodate desktops of different sizes. Before assembly, the length of the electric height-adjustable desk frame is adjusted, and then the desktop is fixed to the frame.

[0004] In order to enable length adjustment, the electric height-adjustable table brackets in related technologies usually have a relatively complex structure. Utility Model Content

[0005] This application provides an electric height-adjustable desk support and an electric height-adjustable desk. The support is length-adjustable and has a simple structure, which helps reduce costs. The technical solution is as follows:

[0006] In a first aspect, embodiments of this application provide an electric height-adjustable desk bracket, which includes a desktop assembly, a transmission telescopic rod, a drive assembly, and two height-adjustable legs;

[0007] The desktop assembly includes an inner crossbeam, an outer crossbeam, and two longitudinal beam supports. One end of the inner crossbeam is connected to one of the longitudinal beam supports, the other end of the inner crossbeam is inserted into one end of the outer crossbeam, and the other end of the outer crossbeam is connected to the other longitudinal beam support.

[0008] The two lifting legs are connected to the two longitudinal beam supports in a one-to-one correspondence;

[0009] One end of the transmission telescopic rod is connected to one of the lifting legs, and the other end of the transmission telescopic rod is connected to the other lifting leg. The drive assembly is used to drive the transmission telescopic rod to rotate so as to drive the two lifting legs to rise and fall synchronously.

[0010] In some examples, the transmission telescopic rod includes an outer tube, a first connecting rod, a first connecting sleeve, and a locking sleeve; the first connecting rod is coaxially inserted into the outer tube, and one end of the first connecting rod is located outside the outer tube; the first connecting sleeve is sleeved outside the first connecting rod and is movable along the first connecting rod, the first connecting sleeve is connected to the outer tube and is circumferentially locked to the outer tube; the locking sleeve is sleeved outside the first connecting rod and is used to lock the first connecting sleeve to the first connecting rod.

[0011] In some examples, the cross-section of the first connecting rod is polygonal; the first connecting sleeve includes a sleeve portion that fits over the first connecting rod, the inner hole of the sleeve portion is a polygonal hole, and the inner hole of the sleeve portion is clearance-fitted with the first connecting rod.

[0012] In some examples, the outer wall of the socket has a plurality of first strip grooves distributed circumferentially along the socket and extending along the length of the socket.

[0013] The inner wall of the outer tube has a plurality of first strip ribs, which are distributed along the circumference of the outer tube and extend along the length of the outer tube. The plurality of first strip ribs are respectively inserted into the plurality of first strip grooves.

[0014] In some examples, the socket is tapered, with the smaller diameter end facing the inside of the outer tube.

[0015] In some examples, the first connecting sleeve further includes a locking part, which is sleeved over the first connecting rod and coaxially connected to the end of the sleeve away from the outer tube. The sidewall of the locking part has a plurality of strip-shaped notches distributed circumferentially along the locking part. The locking part is used to deform inward under the action of the locking sleeve to clamp the first connecting rod.

[0016] In some examples, the locking part is tapered and is threadedly connected to the locking sleeve.

[0017] In some examples, the transmission telescopic rod further includes a second connecting rod, a second connecting sleeve, and a third connecting sleeve; the second connecting sleeve includes a coaxially connected insertion part and a sleeve part, the insertion part being inserted into the end of the outer tube away from the locking sleeve and circumferentially locked to the outer tube; the third connecting sleeve is connected to one end of the second connecting rod, the third connecting sleeve being inserted into the sleeve part and circumferentially locked to the sleeve part.

[0018] In some examples, the inner wall of the sleeve portion has a plurality of second strip grooves distributed circumferentially along the sleeve portion and extending along the length direction of the sleeve portion;

[0019] The outer wall of the third connecting sleeve has a plurality of second strip ribs, which are distributed circumferentially along the third connecting sleeve and extend along the length of the third connecting sleeve. The plurality of second strip ribs are respectively inserted into the plurality of second strip grooves.

[0020] Secondly, this application also provides an electric height-adjustable desk, which includes a desktop panel and an electric height-adjustable desk support as described in the first aspect, wherein the desktop panel is connected to the desktop assembly.

[0021] The beneficial effects of the technical solutions provided in this application include at least the following:

[0022] A desktop assembly is installed to connect the desktop panel. This assembly includes an inner crossbeam, an outer crossbeam, and two longitudinal beam supports. One end of the inner crossbeam and one end of the outer crossbeam are each connected to a longitudinal beam support. The inner and outer crossbeams are interlocked, allowing them to extend and retract, adjusting the distance between the two longitudinal beam supports to accommodate desktop panels of different sizes. Two lifting legs are connected to the longitudinal beam supports, allowing the desktop height to be adjusted by raising and lowering the legs. A drive mechanism connects the two ends of a telescopic transmission rod to the two lifting legs, rotating the rod and causing the two lifting legs to rise and fall synchronously. Only one drive mechanism is needed to transmit power to the two lifting legs, enabling them to rise and fall synchronously. Furthermore, the telescopic transmission rod can extend and retract to change its length, accommodating desktop panels of different sizes. This electric height-adjustable desk bracket not only offers length adjustment but also has a simple structure, contributing to cost reduction. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram of an electric height-adjustable table support provided in an embodiment of this application;

[0025] Figure 2 This is a partial schematic diagram of a desktop component provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of a transmission telescopic rod provided in an embodiment of this application;

[0027] Figure 4 This is a partial structural schematic diagram of a transmission telescopic rod provided in an embodiment of this application;

[0028] Figure 5 This is a partial structural schematic diagram of a transmission telescopic rod provided in an embodiment of this application;

[0029] Figure 6 This is a structural schematic diagram of an electric height-adjustable table provided in an embodiment of this application.

[0030] Icon labels:

[0031] 10-Desktop assembly; 100-Desktop panel; 11-Inner crossbeam; 12-Outer crossbeam; 121-Fasting screw; 13-Longitudinal beam support arm; 20-Transmission telescopic rod; 21-Outer tube; 211-First strip rib; 22-First connecting rod; 23-First connecting sleeve; 231-Sleeve part; 231a-First strip groove; 232-Locking part; 24-Locking sleeve; 25-Second connecting rod; 26-Second connecting sleeve; 261-Plug-in part; 261a-Third strip groove; 262-Sleeve part; 262a-Second strip groove; 27-Third connecting sleeve; 271-Second strip rib; 30-Drive assembly; 40-Lifting leg; 41-Base rod; 42-Lifting rod; 200-Electric lifting table bracket. Detailed Implementation

[0032] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0033] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 application 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 application.

[0036] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. "A plurality" means two or more.

[0038] Figure 1 This is a structural schematic diagram of an electric height-adjustable desk bracket provided in an embodiment of this application. Figure 1 As shown, the electric height-adjustable desk support includes a desktop assembly 10, a transmission telescopic rod 20, a drive assembly 30, and two height-adjustable legs 40.

[0039] The desktop assembly 10 includes an inner crossbeam 11, an outer crossbeam 12, and two longitudinal beam supports 13. One end of the inner crossbeam 11 is connected to one of the longitudinal beam supports 13, and the other end of the inner crossbeam 11 is inserted into one end of the outer crossbeam 12. The other end of the outer crossbeam 12 is connected to the other longitudinal beam support 13.

[0040] The two lifting legs 40 are connected to the two longitudinal beam supports 13 in a one-to-one correspondence.

[0041] One end of the telescopic rod 20 is connected to one lifting leg 40, and the other end of the telescopic rod 20 is connected to another lifting leg 40. The drive assembly 30 is used to drive the telescopic rod 20 to rotate, so as to drive the two lifting legs 40 to rise and fall synchronously.

[0042] For example, the drive assembly 30 may include a motor and a reducer, and the drive assembly 30 may be mounted on one of the lifting legs 40. The output gear of the reducer may be fitted onto the transmission telescopic rod 20, so that the transmission telescopic rod 20 can pass through the drive assembly 30 and be drively connected to the lifting leg 40.

[0043] Desktop assembly 10 connects to desktop panel 100. Desktop assembly 10 includes an inner crossbeam 11, an outer crossbeam 12, and two longitudinal beam supports 13. One end of the inner crossbeam 11 and one end of the outer crossbeam 12 are each connected to a longitudinal beam support 13. The inner crossbeam 11 and outer crossbeam 12 are interlocked, allowing them to extend and retract, adjusting the distance between the two longitudinal beam supports 13 to accommodate desktop panels 100 of different sizes. Two lifting legs 40 are connected to the longitudinal beam supports 13, allowing the height of desktop panel 100 to be adjusted by raising and lowering the lifting legs 40. By connecting the two ends of the transmission telescopic rod 20 to the two lifting legs 40 respectively, and using the drive assembly 30 to drive the transmission telescopic rod 20 to rotate, the two lifting legs 40 are raised and lowered synchronously. With the help of the telescopic rod 20, only one drive assembly 30 is needed to transmit power to the two lifting legs 40, enabling them to rise and fall synchronously. Furthermore, the telescopic rod 20 can extend and retract to change its length, allowing it to accommodate desktops 100 of different sizes. This electric height-adjustable desk bracket not only offers length adjustment but also features a simple structure, which helps reduce costs.

[0044] Figure 2 This is a partial schematic diagram of a desktop component provided in an embodiment of this application, such as... Figure 2 As shown, in some examples, the desktop assembly 10 may also include a fastening screw 121, which can be inserted into the side wall of the outer crossbeam 12. By tightening the fastening screw 121, the fastening screw 121 is pressed against the side wall of the inner crossbeam 11, thereby locking the inner crossbeam 11 and the outer crossbeam 12. When it is necessary to adjust the overall length of the inner crossbeam 11 and the outer crossbeam 12, the fastening screw 121 can be loosened, thus allowing adjustment of the length of the inner crossbeam 11 inserted into the outer crossbeam 12.

[0045] The fastening screw 121 can be located at the bottom of the outer crossbeam 12. The fastening screw 121 is screwed in from the bottom of the outer crossbeam 12 to avoid the fastening screw 121 affecting the placement of the desktop board 100.

[0046] Figure 3 This is a schematic diagram of the structure of a transmission telescopic rod provided in an embodiment of this application, as shown below. Figure 3As shown, the transmission telescopic rod 20 includes an outer tube 21, a first connecting rod 22, a first connecting sleeve 23, and a locking sleeve 24. The first connecting rod 22 is coaxially inserted into the outer tube 21, with one end of the first connecting rod 22 located outside the outer tube 21. The first connecting sleeve 23 is sleeved on the first connecting rod 22 and is movable along the first connecting rod 22. The first connecting sleeve 23 is connected to the outer tube 21 and is circumferentially locked to the outer tube 21. The locking sleeve 24 is sleeved on the first connecting rod 22 and is used to lock the first connecting sleeve 23 to the first connecting rod 22.

[0047] When it is necessary to adjust the length of the transmission telescopic rod 20, the locking sleeve 24 can be loosened first to unlock the first connecting sleeve 23 from the first connecting rod 22. Then, the position of the first connecting sleeve 23 on the first connecting rod 22 can be adjusted to change the length of the first connecting rod 22 extending from one end of the outer tube 21. After the adjustment is in place, the first connecting sleeve 23 and the first connecting rod 22 can be locked back together using the locking sleeve 24.

[0048] Figure 4 This is a partial structural schematic diagram of a transmission telescopic rod provided in an embodiment of this application. Figure 4 The diagram shows the disassembled structure of one end of the transmission telescopic rod 20, as follows: Figure 4 As shown, the cross-section of the first connecting rod 22 is polygonal. The first connecting sleeve 23 includes a sleeve portion 231, which is fitted over the first connecting rod 22. The inner hole of the sleeve portion 231 is a polygonal hole, and the inner hole of the sleeve portion 231 is clearance-fitted with the first connecting rod 22.

[0049] By setting the inner hole of the sleeve 231 and the cross-section of the first connecting rod 22 to polygons, such as rectangles, regular pentagons, regular hexagons, etc., the sleeve 231 is fitted over the first connecting rod 22 to form a clearance fit, so that the sleeve 231 can slide along the first connecting rod 22. At the same time, the sleeve 231 and the first connecting rod 22 are locked in the circumferential direction. When the first connecting rod 22 rotates, it can drive the sleeve 231 to rotate.

[0050] like Figure 4 As shown, the outer wall of the socket 231 has a plurality of first strip grooves 231a, which are distributed circumferentially along the socket 231 and extend along the length of the socket 231.

[0051] The inner wall of the outer tube 21 has a plurality of first strip ribs 211, which are distributed along the circumference of the outer tube 21 and extend along the length of the outer tube 21. The plurality of first strip ribs 211 are respectively inserted into a plurality of first strip grooves 231a.

[0052] When assembling the first connecting sleeve 23 and the outer tube 21, the sleeve part 231 can be inserted from the end of the outer tube 21, so that the first strip rib 211 is inserted into the first strip groove 231a. Through the cooperation of the first strip rib 211 and the first strip groove 231a, the first connecting sleeve 23 and the outer tube 21 are locked in the circumferential direction, and the first connecting sleeve 23 can drive the outer tube 21 to rotate.

[0053] As an example, the socket 231 may be tapered, with the smaller diameter end of the socket 231 facing the inside of the outer tube 21.

[0054] Setting the sleeve 231 to be tapered can facilitate the assembly of the first connecting sleeve 23 and the outer tube 21. Under the guidance of the tapered outer wall of the sleeve 231, the first strip rib 211 is gradually inserted into the first strip groove 231a, while keeping the first connecting sleeve 23 and the outer tube 21 coaxial.

[0055] like Figure 4 As shown, the first connecting sleeve 23 may further include a locking part 232. The locking part 232 is fitted over the first connecting rod 22 and is coaxially connected to the end of the sleeve part 231 away from the outer tube 21. The sidewall of the locking part 232 has a plurality of strip-shaped notches 232a, which are distributed circumferentially along the locking part 232. The locking part 232 is used to deform inward under the action of the locking sleeve 24 to clamp the first connecting rod 22.

[0056] Because the sidewall of the locking part 232 has a strip-shaped notch 232a, the sidewall of the locking part 232 can deform inward, that is, towards the first connecting rod 22, when compressed. The locking sleeve 24 compresses the sidewall of the locking part 232, causing it to deform inward and contact the sidewall of the first connecting rod 22, thereby clamping the first connecting rod 22. When the locking sleeve 24 is released, the locking part 232 can separate from the surface of the first connecting rod 22 under its own elasticity, releasing the first connecting rod 22.

[0057] As an example, the locking part 232 is tapered and is threadedly connected to the locking sleeve 24.

[0058] The locking part 232 and the locking sleeve 24 are connected by a thread. The locking part 232 is tapered. The tighter the locking sleeve 24 is tightened, the greater the clamping force of the locking part 232 on the first connecting rod 22, which can make the connection between the first connecting sleeve 23 and the first connecting rod 22 more secure.

[0059] Figure 5 This is a partial structural schematic diagram of a transmission telescopic rod provided in an embodiment of this application. Figure 5 The image shows the disassembled structure of the other end of the transmission telescopic rod 20, as shown below. Figure 5As shown, the transmission telescopic rod 20 may further include a second connecting rod 25, a second connecting sleeve 26, and a third connecting sleeve 27. The second connecting sleeve 26 includes a coaxially connected insertion portion 261 and a sleeve portion 262. The insertion portion 261 is inserted into the end of the outer tube 21 away from the locking sleeve 24, and the insertion portion 261 is circumferentially locked to the outer tube 21. The third connecting sleeve 27 is connected to one end of the second connecting rod 25, and the third connecting sleeve 27 is inserted into the sleeve portion 262, and is circumferentially locked to the sleeve portion 262.

[0060] The first connecting rod 22 and the second connecting rod 25 are connected one-to-one with the two lifting legs 40. The second connecting rod 25 is connected to the outer tube 21 by setting the second connecting sleeve 26 and the third connecting sleeve 27. The structure is simple, easy to assemble and disassemble.

[0061] In some examples, the drive assembly 30 may be connected to the second connecting rod 25. The second connecting rod 25 is drive-connected to one of the lifting legs 40.

[0062] After the first connecting sleeve 23 is locked to the first connecting rod 22, when the second connecting rod 25 is driven to rotate by the drive assembly 30, the second connecting rod 25 drives the lifting leg 40 connected to it to rise and fall, and also drives the second connecting sleeve 26 to rotate through the third connecting sleeve 27. The second connecting sleeve 26 is connected to the outer tube 21 and is circumferentially locked to the outer tube 21. The second connecting sleeve 26 can drive the outer tube 21 to rotate, and then drive the first connecting rod 22 to rotate through the outer tube 21, thereby transmitting power to the other lifting leg 40.

[0063] As an example, the lifting leg 40 may include a base rod 41, a lifting rod 42, and a lead screw mechanism. The lifting rod 42 is sleeved outside the base rod 41. The lead screw of the lead screw mechanism is located inside the lifting rod 42, arranged along the length of the lifting rod 42, and connected to the lifting rod 42. The lead screw extends into the interior of the base rod 41. The slider of the lead screw mechanism is connected to the base rod 41, and the slider is threadedly engaged with the lead screw.

[0064] The first connecting rod 22 is connected to a lead screw in one of the lifting legs 40 to drive the lead screw in that lifting leg 40 to rotate. The second connecting rod 25 is connected to a lead screw in another lifting leg 40 to drive the lead screw in that lifting leg 40 to rotate. The transmission telescopic rod 20 and the lead screw can be perpendicular to each other, and the transmission telescopic rod 20 and the lead screw can be connected by a bevel gear transmission.

[0065] The outer wall of the insertion part 261 may have a plurality of third strip grooves 261a, which may be distributed circumferentially along the insertion part 261 and extend along the length of the insertion part 261. A plurality of first strip ribs 211 may be inserted into the plurality of third strip grooves 261a respectively, thereby making the insertion part 261 and the outer tube 21 locked in a circumferential state.

[0066] like Figure 5 As shown, the inner wall of the sleeve portion 262 has a plurality of second strip grooves 262a, which are distributed circumferentially along the sleeve portion 262 and extend along the length direction of the sleeve portion 262.

[0067] The outer wall of the third connecting sleeve 27 has a plurality of second strip ribs 271, which are distributed circumferentially along the third connecting sleeve 27 and extend along the length of the third connecting sleeve 27. The plurality of second strip ribs 271 are respectively inserted into a plurality of second strip grooves 262a.

[0068] The sleeve 262 and the third connecting sleeve 27 are locked in the circumferential direction through the cooperation of the second strip rib 271 and the second strip groove 262a, and the sleeve 262 can be pulled out directly from the third connecting sleeve 27 when disassembly is required.

[0069] As an example of the assembly process, when assembling the support frame of the electric height-adjustable table, the drive assembly 30 can be mounted on a height-adjustable leg 40. After connecting the second connecting rod 25 and the third connecting sleeve 27, it can be inserted into the drive assembly 30. The outer tube 21, the first connecting rod 22, the first connecting sleeve 23, the locking sleeve 24, and the second connecting sleeve 26 are assembled into a whole. The exposed end of the first connecting rod 22 is connected to another height-adjustable leg 40, and the second connecting sleeve 26 and the third connecting sleeve 27 are assembled together.

[0070] Figure 6 This is a structural schematic diagram of an electric height-adjustable desk provided in an embodiment of this application, as shown below. Figure 6 As shown, the electric height-adjustable desk includes a desktop 100 and a... Figures 1-5 Any of the electric height-adjustable desk brackets 200 shown. The desktop panel 100 is connected to the desktop assembly 10.

[0071] In some examples, the desktop panel 100 may be connected to at least a portion of the inner crossbeam 11, the outer crossbeam 12, and the two longitudinal beam supports 13, for example, to the two longitudinal beam supports 13.

[0072] The electric height-adjustable desk may include multiple desktop panels 100, each with a different length. This allows the desktop panels 100 to be replaced after adjusting the dimensions of the electric height-adjustable desk support 200, so that the dimensions of the desktop panels 100 match the dimensions of the electric height-adjustable desk support 200.

[0073] In some examples, the desktop panel 100 can be made of wood, and the electric height-adjustable desk bracket 200 can be connected to the desktop panel 100 by screws. For example, screws can be screwed into the desktop panel 100 from below the longitudinal beam support arm 13. The screws can be self-tapping screws. After adjusting the dimensions of the electric height-adjustable desk bracket 200, the screws can be re-screwed to secure the desktop panel 100.

[0074] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An electric height-adjustable desk support, characterized in that, It includes a desktop assembly (10), a transmission telescopic rod (20), a drive assembly (30), and two lifting legs (40); The desktop assembly (10) includes an inner crossbeam (11), an outer crossbeam (12), and two longitudinal beam supports (13). One end of the inner crossbeam (11) is connected to one of the longitudinal beam supports (13), and the other end of the inner crossbeam (11) is inserted into one end of the outer crossbeam (12). The other end of the outer crossbeam (12) is connected to the other longitudinal beam support (13). The two lifting legs (40) are connected one-to-one with the two longitudinal beam supports (13); One end of the transmission telescopic rod (20) is connected to one of the lifting legs (40), and the other end of the transmission telescopic rod (20) is connected to the other lifting leg (40). The drive assembly (30) is used to drive the transmission telescopic rod (20) to rotate so as to drive the two lifting legs (40) to rise and fall synchronously.

2. The electric lifting table bracket according to claim 1, characterized in that, The transmission telescopic rod (20) includes an outer tube (21), a first connecting rod (22), a first connecting sleeve (23), and a locking sleeve (24); the first connecting rod (22) is coaxially inserted into the outer tube (21), and one end of the first connecting rod (22) is located outside the outer tube (21); the first connecting sleeve (23) is sleeved outside the first connecting rod (22) and can move along the first connecting rod (22); the first connecting sleeve (23) is connected to the outer tube (21) and is circumferentially locked to the outer tube (21); the locking sleeve (24) is sleeved outside the first connecting rod (22) and is used to lock the first connecting sleeve (23) to the first connecting rod (22).

3. The electric lifting table bracket according to claim 2, characterized in that, The first connecting rod (22) has a polygonal cross-section; the first connecting sleeve (23) includes a sleeve part (231), which is sleeved on the outside of the first connecting rod (22). The inner hole of the sleeve part (231) is a polygonal hole, and the inner hole of the sleeve part (231) is clearance-fitted with the first connecting rod (22).

4. The electric lifting table bracket according to claim 3, characterized in that, The outer wall of the socket (231) has a plurality of first strip grooves (231a), the plurality of first strip grooves (231a) are distributed along the circumference of the socket (231), and the first strip grooves (231a) extend along the length direction of the socket (231). The inner wall of the outer tube (21) has a plurality of first strip ribs (211), which are distributed circumferentially along the outer tube (21) and extend along the length of the outer tube (21). The plurality of first strip ribs (211) are respectively inserted into the plurality of first strip grooves (231a).

5. The electric lifting table bracket according to claim 4, characterized in that, The sleeve (231) is tapered, with the smaller diameter end facing the inside of the outer tube (21).

6. The electric lifting table bracket according to claim 3, characterized in that, The first connecting sleeve (23) further includes a locking part (232), which is sleeved on the outside of the first connecting rod (22) and coaxially connected to the end of the sleeve (231) away from the outer tube (21). The side wall of the locking part (232) has a plurality of strip-shaped notches (232a), which are distributed along the circumference of the locking part (232). The locking part (232) is used to deform inward under the action of the locking sleeve (24) to clamp the first connecting rod (22).

7. The electric lifting table bracket according to claim 6, characterized in that, The locking part (232) is tapered and is threadedly connected to the locking sleeve (24).

8. The electric lifting table bracket according to claim 2, characterized in that, The transmission telescopic rod (20) further includes a second connecting rod (25), a second connecting sleeve (26), and a third connecting sleeve (27); the second connecting sleeve (26) includes a coaxially connected insertion part (261) and a sleeve part (262), the insertion part (261) is inserted into the end of the outer tube (21) away from the locking sleeve (24), and is circumferentially locked with the outer tube (21); the third connecting sleeve (27) is connected to one end of the second connecting rod (25), the third connecting sleeve (27) is inserted into the sleeve part (262), and is circumferentially locked with the sleeve part (262).

9. The electric lifting table bracket according to claim 8, characterized in that, The inner wall of the sleeve portion (262) has a plurality of second strip grooves (262a), the plurality of second strip grooves (262a) are distributed along the circumference of the sleeve portion (262), and the second strip grooves (262a) extend along the length direction of the sleeve portion (262); The outer wall of the third connecting sleeve (27) has a plurality of second strip ribs (271), which are distributed circumferentially along the third connecting sleeve (27) and extend along the length of the third connecting sleeve (27). The plurality of second strip ribs (271) are respectively inserted into the plurality of second strip grooves (262a).

10. An electric height-adjustable desk, characterized in that, It includes a desktop panel (100) and an electrically adjustable desk support (200) as described in any one of claims 1 to 9, wherein the desktop panel (100) is connected to the desktop assembly (10).

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