L-shaped aluminum alloy lifting table frame

Abstract

The utility model belongs to the technical field of lifting tables, and particularly relates to an L-shaped aluminum alloy lifting table frame which comprises a first lifting table leg, a second lifting table leg and a third lifting table leg which are distributed in an L shape. The first telescopic beam is connected with the first lifting table leg and the second lifting table leg and used for adjusting the distance between the first lifting table leg and the second lifting table leg; the second telescopic beam is connected with the second lifting table leg and the third lifting table leg and used for adjusting the distance between the second lifting table leg and the third lifting table leg; according to the L-shaped aluminum alloy lifting table frame, by adjusting the length of the first telescopic beam and the length of the second telescopic beam, a user can accurately control the distance between the second lifting table leg and the first lifting table leg and the distance between the second lifting table leg and the third lifting table leg so that the L-shaped aluminum alloy lifting table frame can meet the layout and work requirements of different rooms.

Description

Technical Field

[0001] This utility model belongs to the field of height-adjustable desk technology, specifically relating to an L-shaped aluminum alloy height-adjustable desk frame. Background Technology

[0002] In the field of office furniture, L-shaped height-adjustable desks offer users a more spacious workspace and a convenient user experience thanks to their unique design.

[0003] Traditional L-shaped height-adjustable desk frames typically only allow adjustment of the distance between two height-adjustable legs, while the distance between the third height-adjustable leg forming the other end of the L-shape cannot be effectively adjusted. This limitation makes it impossible to install smoothly at right angles in some rooms, and also results in wasted space in some areas, severely restricting users' layout choices in the work area and preventing flexible desktop adjustments.

[0004] Therefore, in order to solve the above problems, it is necessary to design an L-shaped aluminum alloy lifting table frame. Utility Model Content

[0005] The purpose of this utility model is to provide an L-shaped aluminum alloy lifting table frame to solve the technical problem that the distance between the third lifting table legs cannot be adjusted.

[0006] To solve the above-mentioned technical problems, this utility model provides an L-shaped aluminum alloy lifting table frame, comprising:

[0007] The table includes three L-shaped adjustable table legs: a first adjustable table leg, a second adjustable table leg, and a third adjustable table leg; a first telescopic beam connected to the first and second adjustable table legs for adjusting the distance between them; a second telescopic beam connected to the second and third adjustable table legs for adjusting the distance between them; three longitudinal beams located on one side of each of the first, second, and third adjustable table legs; and three foot plates located at the bottom of each of the first, second, and third adjustable table legs.

[0008] The first telescopic beam includes: a first connecting pipe, a first support pipe slidably connected to both ends of the first connecting pipe, and at least one first set screw engaging with the first support pipe; wherein one end of any of the first support pipes is connected to a first lifting table leg; one end of the other first support pipe is connected to a second lifting table leg; and the first set screw is adapted to abut against the first connecting pipe when tightened, so that the first connecting pipe abuts against the inner wall of the first support pipe.

[0009] The second telescopic beam comprises a second connecting pipe connected with the second lifting table leg, a second supporting pipe connected with the third lifting table leg, and at least one second set screw engaged with the second supporting pipe; one end of the second connecting pipe is in sliding connection with the second supporting pipe; and the second set screw is adapted to abut against the second connecting pipe when tightened, so that the second connecting pipe abuts against the inner wall of the second supporting pipe.

[0010] The first telescopic transmission rod and the second telescopic transmission rod are provided with a gear box on the outer side thereof; the gear box is fixed on any one of the first supporting pipes; the side surface of the gear box is connected with a second telescopic transmission rod; the other end of the second telescopic transmission rod is connected with the third lifting table leg; the outer side of the first telescopic transmission rod or the second telescopic transmission rod is provided with a worm gear box; a driving motor is arranged below the worm gear box; and the worm gear box is fixed on the first lifting table leg, the second lifting table leg or the third lifting table leg; the driving motor is adapted to drive the first telescopic transmission rod or the second telescopic transmission rod to rotate through the worm gear box, so as to drive the second telescopic transmission rod or the first telescopic transmission rod to rotate through the gear box, thereby synchronously driving the first lifting table leg, the second lifting table leg and the third lifting table leg to lift.

[0011] The first telescopic transmission rod comprises a first hexagonal rod connected with the second lifting table leg, a first sleeve provided on the outer side of the first hexagonal rod, a second hexagonal rod connected with the first lifting table leg, a first inner hexagonal rod connected with the second hexagonal rod, a first nut sleeve provided on the first inner hexagonal rod, and a first flat head screw engaged with the first sleeve; the first sleeve is in sliding connection with the first hexagonal rod; the outer side of the first sleeve is provided with a first external thread part; the other end of the first sleeve is internally provided with a first plug-in recess part; the other end of the first inner hexagonal rod is provided with a first plug-in part; the inner side of one side of the first nut sleeve abuts against the first plug-in part; the first plug-in part is adapted to the first plug-in recess part; and after the first plug-in part is inserted into the first plug-in recess part, the first nut sleeve is engaged with the first external thread part, so that the first sleeve is connected with the first inner hexagonal rod; the first flat head screw is adapted to abut against the first hexagonal rod when tightened, so that the first hexagonal rod abuts against the inner wall of the first sleeve; the gear box is provided on the first hexagonal rod or the second hexagonal rod; and the worm gear box is provided on the second hexagonal rod or the first hexagonal rod.

[0012] The second telescopic transmission rod comprises a third hexagonal rod connected with the third lifting table leg, a second sleeve sleeved outside the third hexagonal rod, a fourth hexagonal rod connected with the gear box, a second inner hexagonal rod connected with the fourth hexagonal rod, a second nut sleeve sleeved on the second inner hexagonal rod and a second flat head screw engaged with the second sleeve; wherein the second sleeve is in sliding connection with the third hexagonal rod; an outer side of the second sleeve is provided with a second outer thread part; an inner side of the other end of the second sleeve is provided with a second plug-in recess part; the other end of the second inner hexagonal rod is provided with a second plug-in part; an inner side of one side of the second nut sleeve is in abutment with the second plug-in part; the second plug-in part is adapted to the second plug-in recess part; and after the second plug-in part is inserted into the second plug-in recess part, the second nut sleeve is engaged with the second outer thread part, so that the second sleeve is connected with the second inner hexagonal rod; the second flat head screw is adapted to abut against the third hexagonal rod when being screwed, so that the third hexagonal rod abuts against the inner wall of the second sleeve.

[0013] Sides of the first lifting table leg, the second lifting table leg and the third lifting table leg are respectively provided with inclined struts; wherein the inclined struts on the first lifting table leg and the second lifting table leg are connected with corresponding first support pipes; and the inclined strut on the third lifting table leg is connected with the second support pipe.

[0014] At least one Z-shaped card is arranged on the first support pipe and the second support pipe; wherein each Z-shaped card is adapted to support a table board.

[0015] The bottom of the foot plate is symmetrically provided with foundation screws.

[0016] The beneficial effects of the utility model are as follows:

[0017] (1), the utility model discloses a length of first telescopic beam and second telescopic beam is adjusted, and user can accurately control the interval between second lifting table leg and first lifting table leg, the interval between second lifting table leg and third lifting table leg, to adapt to the layout and work demand of different rooms, and the structure strength and stability of table frame are increased through the setting up of longitudinal beam and foot plate, and the stability and safety of table top during adjustment and use are ensured.

[0018] Other features and advantages of the utility model will be set forth in the subsequent description, and partially become obvious from the description, or be understood by implementing the utility model. The purposes and other advantages of the utility model are realized and obtained by the structure specially pointed out in the description and the drawings.

[0019] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are taken as examples, and the detailed description is as follows by combining with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Fig. 1 is a perspective view of the preferred embodiment of the whole of the present application;

[0022] Fig. 2 is a perspective view of the preferred embodiment of the first telescopic beam and the second telescopic beam of the present application;

[0023] Fig. 3 is an exploded view of the preferred embodiment of the first telescopic transmission rod and the second telescopic transmission rod of the present application;

[0024] Fig. 4 is a perspective view of the preferred embodiment of the second telescopic transmission rod of the present application.

[0025] In the drawings:

[0026] The first lifting table leg 1, the second lifting table leg 2, and the third lifting table leg 3;

[0027] The first telescopic beam 4, the first connecting pipe 401, the first supporting pipe 402, and the first locking screw 403;

[0028] The second telescopic beam 5, the second connecting pipe 501, the second supporting pipe 502, and the second locking screw 503;

[0029] The longitudinal beam 6 and the foot plate 7;

[0030] The first telescopic transmission rod 8, the first hexagonal rod 801, the first sleeve 802, the first external thread part 8021, the first plug-in concave part 8022, the second hexagonal rod 803, the first internal hexagonal rod 804, the first plug-in part 8041, the first nut sleeve 805, and the first flat head screw 806;

[0031] The gear box 9, the second telescopic transmission rod 10, the third hexagonal rod 1001, the second sleeve 1002, the second external thread part 10021, the second plug-in concave part 10022, the fourth hexagonal rod 1003, the second internal hexagonal rod 1004, the second plug-in part 10041, the second nut sleeve 1005, and the second flat head screw 1006;

[0032] The worm gear box 11, the driving motor 12, the inclined support 13, the Z-shaped clamp 14, and the anchor bolt 15. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example 1

[0034] like Figs. 1 to 4 As shown, this embodiment provides an L-shaped aluminum alloy height-adjustable desk frame, including:

[0035] The table includes an L-shaped arrangement of three lifting legs: a first lifting leg 1, a second lifting leg 2, and a third lifting leg 3; a first telescopic beam 4 connected to the first lifting leg 1 and the second lifting leg 2 for adjusting the distance between them; a second telescopic beam 5 connected to the second lifting leg 2 and the third lifting leg 3 for adjusting the distance between them; three longitudinal beams 6, each located on one side of the first lifting leg 1, the second lifting leg 2, and the third lifting leg 3; and three foot plates 7, each located at the bottom of the first lifting leg 1, the second lifting leg 2, and the third lifting leg 3.

[0036] In this embodiment, by adjusting the lengths of the first telescopic beam 4 and the second telescopic beam 5, the user can precisely control the distance between the second lifting table leg 2 and the first lifting table leg 1, and the distance between the second lifting table leg 2 and the third lifting table leg 3, to adapt to different room layouts and work needs. At the same time, by setting the longitudinal beam 6 and the footboard 7, the structural strength and stability of the table frame are increased, ensuring the stability and safety of the tabletop during adjustment and use.

[0037] The first telescopic beam 4 includes: a first connecting pipe 401, a first support pipe 402 slidably connected to both ends of the first connecting pipe 401, and at least one first set screw 403 engaging with the first support pipe 402; wherein one end of any of the first support pipes 402 is connected to the first lifting table leg 1; one end of the other first support pipe 402 is connected to the second lifting table leg 2; and the first set screw 403 is adapted to abut against the first connecting pipe 401 when tightened, so that the first connecting pipe 401 abuts against the inner wall of the first support pipe 402.

[0038] In the embodiment, the user can adjust the distance between the first lifting table leg 1 and the second lifting table leg 2 by sliding the first supporting pipe 402 in the first connecting pipe 401, the first fixing screw 403 is temporarily in a loosened state and does not hinder the sliding of the first supporting pipe 402, when the desired distance is reached, the user tightens the first fixing screw 403 to abut against the inner wall of the first connecting pipe 401, thereby locking the position of the first supporting pipe 402 and preventing it from sliding, so as to accurately adjust the distance between the second lifting table leg 2 and the first lifting table leg 1 to adapt to different working spaces and room layouts.

[0039] The second telescopic beam 5 comprises a second connecting pipe 501 connected with the second lifting table leg 2, a second supporting pipe 502 connected with the third lifting table leg 3, and at least one second fixing screw 503 engaged with the second supporting pipe 502; wherein one end of the second connecting pipe 501 is in sliding connection with the second supporting pipe 502; and the second fixing screw 503 is adapted to abut against the second connecting pipe 501 when tightened, so that the second connecting pipe 501 abuts against the inner wall of the second supporting pipe 502; wherein the working principle of the second telescopic beam 5 is the same as that of the first telescopic beam 4, and the function is to accurately adjust the distance between the second lifting table leg 2 and the third lifting table leg 3 to adapt to different working spaces and room layouts.

[0040] The first telescopic transmission rod 8 is arranged between the first lifting table leg 1 and the second lifting table leg 2; the outer side of the first telescopic transmission rod 8 is sleeved with a gear box 9; the gear box 9 is fixed on any first supporting pipe 402; the side surface of the gear box 9 is connected with a second telescopic transmission rod 10; the other end of the second telescopic transmission rod 10 is connected with the third lifting table leg 3; the outer side of the first telescopic transmission rod 8 or the second telescopic transmission rod 10 is sleeved with a worm gear box 11; wherein the lower side of the worm gear box 11 is provided with a driving motor 12; and the worm gear box 11 is fixed on the first lifting table leg 1 or the second lifting table leg 2 or the third lifting table leg 3; the driving motor 12 is adapted to drive the first telescopic transmission rod 8 or the second telescopic transmission rod 10 to rotate through the worm gear box 11, so as to drive the second telescopic transmission rod 10 or the first telescopic transmission rod 8 to rotate through the gear box 9, so as to synchronously drive the first lifting table leg 1, the second lifting table leg 2 and the third lifting table leg 3 to lift.

[0041] In the embodiment, when the driving motor 12 starts, power is transmitted to the first telescopic transmission rod 8 or the second telescopic transmission rod 10 through the speed reduction and torque increasing effect of the worm gear box 11, and the power is transmitted from the first telescopic transmission rod 8 to the second telescopic transmission rod 10 (or from the second telescopic transmission rod 10 to the first telescopic transmission rod 8) through the gear transmission mechanism inside the gear box 9, so as to realize the conversion and transmission of the power. In the process of power transmission, the first telescopic transmission rod 8 and the second telescopic transmission rod 10 rotate synchronously, so as to ensure that the first lifting table leg 1, the second lifting table leg 2 and the third lifting table leg 3 can be lifted synchronously, so that the table frame can be kept stable and stable during lifting, and shaking or tilting caused by asynchronization is avoided.

[0042] The first telescopic transmission rod 8 comprises a first hexagonal rod 801 connected with the second lifting table leg 2, a first sleeve 802 sleeved outside the first hexagonal rod 801, a second hexagonal rod 803 connected with the first lifting table leg 1, a first inner hexagonal rod 804 connected with the second hexagonal rod 803, a first nut sleeve 805 sleeved on the first inner hexagonal rod 804 and a first flat head screw 806 engaged with the first sleeve 802; wherein the first sleeve 802 is in sliding connection with the first hexagonal rod 801; an outer side of the first sleeve 802 is provided with a first outer thread part 8021; an inner side of one end of the first sleeve 802 is provided with a first plug-in recess part 8022; the other end of the first inner hexagonal rod 804 is provided with a first plug-in part 8041; one side of the first nut sleeve 805 is in abutment with the first plug-in part 8041; the first plug-in part 8041 is adapted to the first plug-in recess part 8022; and the first plug-in part 8041 is adapted to be engaged with the first outer thread part 8021 after being inserted into the first plug-in recess part 8022, so as to connect the first sleeve 802 with the first inner hexagonal rod 804; the first flat head screw 806 is adapted to abut against the first hexagonal rod 801 when being screwed, so as to abut the first hexagonal rod 801 against the inner wall of the first sleeve 802; the gear box 9 is sleeved on the first hexagonal rod 801 or the second hexagonal rod 803; and the worm gear box 11 is sleeved on the second hexagonal rod 803 or the first hexagonal rod 801.

[0043] In the embodiment, when the first telescopic transmission rod 8 needs to be installed, first, the first plug-in part 8041 of the first inner hexagonal rod 804 is inserted into the first plug-in recess part 8022 of the first sleeve 802, ensuring that the two are fitted, then the first nut sleeve 805 is tightened on the first external thread part 8021 of the first sleeve 802 until the inside thereof abuts against the first plug-in part 8041, achieving firm connection of the first sleeve 802 and the first inner hexagonal rod 804, finally, the first hexagonal rod 801 is inserted into the first sleeve 802, and then the first flat head screw 806 is tightened to abut against the first hexagonal rod 801, so that the first hexagonal rod 801 abuts against the first sleeve 802, so that the first telescopic transmission rod 8 is synchronously transmitted to the first lifting table leg 1 and the second lifting table leg 2; when the length of the first telescopic transmission rod 8 needs to be adjusted, since the first sleeve 802 and the first hexagonal rod 801 are in sliding connection, the relative position of the two is adjusted to change the total length of the first telescopic transmission rod 8, and after the relative position is adjusted, the first flat head screw 806 is used to lock the relative position of the first sleeve 802 and the first hexagonal rod 801, through the above steps, the user can conveniently adjust the length of the first telescopic transmission rod 8, so as to adapt to the transmission between table legs of different distances.

[0044] The second telescopic transmission rod 10 comprises a third hexagonal rod 1001 connected with the third lifting table leg 3, a second sleeve 1002 sleeved outside the third hexagonal rod 1001, a fourth hexagonal rod 1003 connected with the gear box 9, a second inner hexagonal rod 1004 connected with the fourth hexagonal rod 1003, a second nut sleeve 1005 sleeved on the second inner hexagonal rod 1004, and a second flat head screw 1006 engaged with the second sleeve 1002; wherein the second sleeve 1002 is in sliding connection with the third hexagonal rod 1001; the outside of the second sleeve 1002 is provided with a second external thread part 10021; the other end of the second sleeve 1002 is internally provided with a second plug-in recess part 10022; the other end of the second inner hexagonal rod 1004 is provided with a second plug-in part 10041; the inside of one side of the second nut sleeve 1005 abuts against the second plug-in part 10041; the second plug-in part 10041 is fitted with the second plug-in recess part 10022; and the second plug-in part 10041 is adapted to engage the second nut sleeve 1005 with the second external thread part 10021 after being inserted into the second plug-in recess part 10022, so as to connect the second sleeve 1002 and the second inner hexagonal rod 1004; the second flat head screw 1006 is adapted to abut against the third hexagonal rod 1001 when being tightened, so that the third hexagonal rod 1001 abuts against the inner wall of the second sleeve 1002; wherein the second telescopic transmission rod 10 has the same effect as the first telescopic transmission rod 8, and will not be described in detail here.

[0045] The side of the first lifting table leg 1, the second lifting table leg 2 and the third lifting table leg 3 is respectively provided with a diagonal brace 13; wherein the diagonal brace 13 on the first lifting table leg 1 and the second lifting table leg 2 is connected with the corresponding first support pipe 402; and the diagonal brace 13 on the third lifting table leg 3 is connected with the second support pipe 502; wherein by setting the diagonal brace 13, the stability of the L-shaped aluminum alloy table frame is improved, so that it can better bear various loads and stresses.

[0046] The first support pipe 402 and the second support pipe 502 are provided with at least one Z-shaped card 14; wherein each Z-shaped card 14 is adapted to support a table plate; wherein by setting the Z-shaped card 14, additional support points are provided to support the table plate and prevent the table plate from sagging or deforming due to gravity or load.

[0047] The bottom of the foot plate 7 is symmetrically provided with a foundation bolt 15; wherein by setting the foundation bolt 15, the gap between the foot plate 7 and the ground is adjusted, so that the table frame can maintain horizontal and stable effect under different ground conditions.

[0048] In the present application, each device (parts without specific structure) selected is a general standard part or a part known to those skilled in the art, and its structure and principle can be known by the technical personnel through the technical manual or through the conventional experimental method.

[0049] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0051] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. An L-shaped aluminum alloy lifting table frame, characterized by, The utility model relates to an L-shaped aluminum alloy lifting table frame which comprises: a first lifting table leg (1), a second lifting table leg (2) and a third lifting table leg (3) arranged in an L shape; a first telescopic beam (4) connected to the first lifting table leg (1) and the second lifting table leg (2) and used for adjusting the distance between the first lifting table leg (1) and the second lifting table leg (2); a second telescopic beam (5) connected to the second lifting table leg (2) and the third lifting table leg (3) and used for adjusting the distance between the second lifting table leg (2) and the third lifting table leg (3); three longitudinal beams (6) arranged on one side of the first lifting table leg (1), the second lifting table leg (2) and the third lifting table leg (3) respectively; and three foot plates (7) arranged at the bottom of the first lifting table leg (1), the second lifting table leg (2) and the third lifting table leg (3) respectively.

2. The L-shaped aluminum alloy lifting table frame according to claim 1, wherein the first telescopic beam (4) comprises a first connecting pipe (401), a first supporting pipe (402) slidably connected to both ends of the first connecting pipe (401) and at least one first locking screw (403) engaged with the first supporting pipe (402); wherein one end of any first supporting pipe (402) is connected to the first lifting table leg (1); one end of the other first supporting pipe (402) is connected to the second lifting table leg (2); and the first locking screw (403) is adapted to abut against the first connecting pipe (401) when tightened, so that the first connecting pipe (401) abuts against the inner wall of the first supporting pipe (402).

3. The L-shaped aluminum alloy lifting table frame according to claim 2, wherein the second telescopic beam (5) comprises a second connecting pipe (501) connected to the second lifting table leg (2), a second supporting pipe (502) connected to the third lifting table leg (3) and at least one second locking screw (503) engaged with the second supporting pipe (502); wherein one end of the second connecting pipe (501) is slidably connected to the second supporting pipe (502); and the second locking screw (503) is adapted to abut against the second connecting pipe (501) when tightened, so that the second connecting pipe (501) abuts against the inner wall of the second supporting pipe (502).

4. The L-shaped aluminum alloy lifting table frame according to claim 3, wherein a first telescopic transmission rod (8) is arranged between the first lifting table leg (1) and the second lifting table leg (2); a gear box (9) is arranged on the outside of the first telescopic transmission rod (8); the gear box (9) is fixed on any first supporting pipe (402); a second telescopic transmission rod (10) is connected to the side of the gear box (9); the other end of the second telescopic transmission rod (10) is connected to the third lifting table leg (3); a worm gear box (11) is arranged on the outside of the first telescopic transmission rod (8) or the second telescopic transmission rod (10); wherein a driving motor (12) is arranged below the worm gear box (11); and the worm gear box (11) is fixed on the first lifting table leg (1), the second lifting table leg (2) or the third lifting table leg (3). The driving motor (12) is suitable for driving the first telescopic transmission rod (8) or the second telescopic transmission rod (10) to rotate through the worm gear box (11), so as to drive the second telescopic transmission rod (10) or the first telescopic transmission rod (8) to rotate through the gear box (9), and drive the first lifting table leg (1), the second lifting table leg (2) and the third lifting table leg (3) to lift synchronously.

5. The L-shaped aluminum alloy lifting table frame of claim 4, wherein, The first telescopic transmission rod (8) comprises a first hexagonal rod (801) connected with the second lifting table leg (2), a first sleeve (802) sleeved outside the first hexagonal rod (801), a second hexagonal rod (803) connected with the first lifting table leg (1), a first inner hexagonal rod (804) connected with the second hexagonal rod (803), a first nut sleeve (805) sleeved on the first inner hexagonal rod (804), and a first flat head screw (806) engaged with the first sleeve (802); wherein The first sleeve (802) is in sliding connection with the first hexagonal rod (801); An outer side of the first sleeve (802) is provided with a first outer threaded portion (8021); An inner side of one side of the first nut sleeve (805) is in abutment with the first insertion portion (8041); The first insertion portion (8041) is adapted to be inserted into the first insertion recess (8022), and the first nut sleeve (805) is engaged with the first outer threaded portion (8021) after the insertion, so as to connect the first sleeve (802) with the first inner hexagonal rod (804); The first flat head screw (806) is adapted to abut against the first hexagonal rod (801) when being screwed, so as to abut the first hexagonal rod (801) against the inner wall of the first sleeve (802); The gear box (9) is sleeved on the first hexagonal rod (801) or the second hexagonal rod (803); The worm gear box (11) is sleeved on the second hexagonal rod (803) or the first hexagonal rod (801).

6. The L-shaped aluminum alloy lifting table frame of claim 5, wherein, The second telescopic transmission rod (10) comprises a third hexagonal rod (1001) connected with the third lifting table leg (3), a second sleeve (1002) sleeved outside the third hexagonal rod (1001), a fourth hexagonal rod (1003) connected with the gear box (9), a second inner hexagonal rod (1004) connected with the fourth hexagonal rod (1003), a second nut sleeve (1005) sleeved on the second inner hexagonal rod (1004), and a second flat head screw (1006) engaged with the second sleeve (1002); wherein The second sleeve (1002) is in sliding connection with the third hexagonal rod (1001); An outer side of the second sleeve (1002) is provided with a second outer threaded portion (10021); An inner side of one side of the second nut sleeve (1005) is in abutment with the second insertion portion (10041); ​ ​ The other end of the second sleeve (1002) is internally provided with a second plug-in recess (10022); The other end of the second hexagonal rod (1004) is provided with a second plug-in part (10041); The inner side of one side of the second nut sleeve (1005) abuts against the second plug-in part (10041); The second plug-in part (10041) is adapted to the second plug-in recess (10022); and The second plug-in part (10041) is adapted to engage the second nut sleeve (1005) with the second external thread part (10021) after being inserted into the second plug-in recess (10022), so as to connect the second sleeve (1002) with the second hexagonal rod (1004); The second flat head screw (1006) is adapted to abut against the third hexagonal rod (1001) when being screwed, so as to abut the third hexagonal rod (1001) against the inner wall of the second sleeve (1002).

7. The L-shaped aluminum alloy lifting table frame according to claim 6, wherein, The first lifting table leg (1), the second lifting table leg (2) and the third lifting table leg (3) are respectively provided with a diagonal brace (13); wherein The diagonal brace (13) on the first lifting table leg (1) and the second lifting table leg (2) is connected with the corresponding first support pipe (402); and The diagonal brace (13) on the third lifting table leg (3) is connected with the second support pipe (502).

8. The L-shaped aluminum alloy lifting table frame according to claim 7, wherein, The first support pipe (402) and the second support pipe (502) are provided with at least one Z-shaped card (14); wherein Each Z-shaped card (14) is adapted to support a table board.

9. The L-shaped aluminum alloy lifting table frame according to claim 8, wherein, The bottom of the foot plate (7) is symmetrically provided with a ground screw (15).

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