Supporting plate, cross beam and lifting column connecting and fixing device of lifting table

Abstract

The application discloses a support plate and a cross beam of a lifting table and a connecting and fixing device of a lifting column, two sheet metal parts are welded on the inner surface of the support plate, wherein the first sheet metal part is buckled with one side of the top end of the lifting column, the second sheet metal part is screw-fixed with the third sheet metal part welded on the other side of the top end of the lifting column through one or more screws of the cross beam, the screws are screwed from below to above or from outside to inside; the first sheet metal part is a vertical plate with a hook at the bottom end, the top of the vertical plate is further provided with a horizontal plate opposite to the direction of the hook, the horizontal plate of the first sheet metal part is welded and fixed with the bottom surface of the horizontal plate of the support plate, one side wall of the top end of the lifting column is provided with a transverse long hole, and the hook at the bottom end of the vertical plate of the first sheet metal part is buckled in the transverse long hole. The connecting and fixing device prevents the lifting column from shaking during lifting, is firmly and reliably connected with each other, and the lifting column can be taken out without disassembling the table plate.

Description

Technical Field

[0001] This invention relates to the field of height-adjustable desk technology, specifically to a connection and fixing device for the support plate, crossbeam, and lifting column of a height-adjustable desk. Background Technology

[0002] A height-adjustable desk, such as an electric height-adjustable desk, generally includes a tabletop, a support plate, a crossbeam, and a lifting column. The tabletop is usually fixed to the support plate and / or the crossbeam using multiple screws, while the support plate is usually fixed to the top of the lifting column using multiple screws, and the crossbeam is also fixed to the top of the lifting column using multiple screws.

[0003] However, the existing technology for adjusting tables has the following shortcomings in its connection and fixing devices for the support plate, crossbeam, and lifting column: 1. Since the support plate, crossbeam, and lifting column are only fixed by screws, the lifting column is prone to shaking during long-term lifting, which affects the firmness, stability, and reliability of the connection between the support plate, crossbeam, and lifting column. 2. Since the bolts connecting the crossbeam to the column and / or support plate all pass through from top to bottom and are screwed on at the bottom, once the tabletop is fixed to the support plate and / or crossbeam, if the lifting column needs to be disassembled for normal maintenance or repair, the tabletop must be disassembled first, which is time-consuming, labor-intensive, and has low disassembly and installation efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a support plate and crossbeam of a lifting table and a lifting column connection and fixing device that prevents the lifting column from shaking during the lifting process, is firmly and reliably connected to each other, and allows the lifting column to be removed without disassembling the table.

[0005] The technical solution of the present invention is to provide a support plate, a crossbeam, and a lifting column connecting and fixing device for a lifting table. Two sheet metal parts are welded on the inner surface of the support plate. The first sheet metal part is fastened to one side of the top of the lifting column, and the second sheet metal part is fixed to the third sheet metal part welded to the other side of the top of the lifting column by one or more screws passing through the crossbeam. The screws are tightened from bottom to top or from outside to inside.

[0006] With the above structure, the support plate, crossbeam, and lifting column connection and fixing device of the lifting table of the present invention have the following advantages:

[0007] Because the support plate, crossbeam and lifting column are fixed by the fastening of sheet metal parts and the screw connection between sheet metal parts, the shaking between the lifting columns during the lifting process is prevented or even avoided, ensuring the firmness, stability and reliability of the connection between the support plate, crossbeam and lifting column.

[0008] Furthermore, since the screws of the crossbeam and the column and / or support plate are all screwed on from bottom to top, when it is necessary to disassemble the lifting column for normal maintenance or repair, the top surface of the table can be placed on the ground, the screws can be unscrewed, and then the fastener between the top of the column and the first sheet metal part can be disengaged. The lifting column can then be removed directly. That is, the lifting column can be removed without removing the table. Disassembly and installation are both time-saving and labor-saving, and both are convenient and efficient.

[0009] Furthermore, the first sheet metal part is a vertical plate with a hook at the bottom, and a horizontal plate at the top of the vertical plate facing the opposite direction to the hook. The horizontal plate of the first sheet metal part is welded and fixed to the bottom surface of the horizontal plate of the support plate. There is a transverse elongated through hole on one side wall of the top of the lifting column, and the hook at the bottom of the vertical plate of the first sheet metal part is engaged in the transverse elongated through hole. With the above structure, the structure of the first sheet metal part is simpler, the mechanical properties are better, the engagement with the top of the lifting column is more secure and reliable, and it is easier to install and disassemble, further ensuring the firmness, stability and reliability of the connection between the support plate and the lifting column.

[0010] Furthermore, the second sheet metal part is a vertical U-shaped plate with its opening facing the top of the lifting column. One end of the vertical U-shaped plate is welded and fixed to the inner surface of the vertical plate of the support plate. The bottom side plate of the vertical U-shaped plate has one or more first threaded holes. With the above structure, the structure of the second sheet metal part is simpler, its mechanical properties are better, and it provides convenience for screws to be screwed in from bottom to top.

[0011] Furthermore, the third sheet metal part is a first L-shaped plate. The vertical plate of the first L-shaped plate is welded and fixed to the other side wall of the top of the lifting column. A gap is left between the upper and lower side plates of the vertical U-shaped plate and the vertical plate of the first L-shaped plate. A gap is left between the lower side plate of the vertical U-shaped plate and the horizontal plate of the first L-shaped plate. The horizontal plate of the first L-shaped plate has one or more first through holes for screws to be tightened into the first threaded hole. With the above structure, the third sheet metal part has a simpler structure, better mechanical properties, and provides the necessary positional and structural conditions for a firm and reliable connection between the crossbeam of the rectangular outer tube, the support plate, and the lifting column.

[0012] Furthermore, the crossbeam is a rectangular tube assembly, which includes an inner rectangular tube located in the middle of the tabletop's length and an outer rectangular tube fitted around the end of the inner tube. The end of the outer rectangular tube is inserted into the gaps between the upper and lower side plates of the vertical U-shaped plate and the vertical plate of the first L-shaped plate, and the gap between the lower side plate of the vertical U-shaped plate and the horizontal plate of the first L-shaped plate, to limit the position of the outer rectangular tube. The bottom plate at the end of the outer rectangular tube has one or more second through holes and / or one or more second threaded holes. With the above structure, the connection between the support plate, the crossbeam, and the lifting column is more robust and reliable, further ensuring the robustness, stability, and reliability of the connection between the support plate, the crossbeam, and the lifting column, as well as the technical effect that the lifting column can be removed without disassembling the tabletop and that installation and disassembly are convenient.

[0013] Furthermore, the end wall of the rectangular outer tube abuts against the inner wall of the vertical plate of the support plate. With the above structure, the connection between the crossbeam, the support plate, and the lifting column is more robust, stable, and reliable, further ensuring the technical effect of the robustness, stability, and reliability of the connection between the support plate, the crossbeam, and the lifting column.

[0014] Furthermore, the lifting table has two lifting columns, and the supporting plate, crossbeam, and lifting column connecting and fixing devices are in two sets. Each set of connecting and fixing devices connects to the inner surface of the supporting plate, the two side walls at the top of the lifting column, and the outer end of the crossbeam, respectively. With this structure, the layout of each lifting table is more reasonable, and the connection and fixing of the supporting plate, crossbeam, and lifting column at both ends of each lifting table is more secure, stable, and reliable. This ensures the firmness, stability, and reliability of the connection between the supporting plate, crossbeam, and lifting column at both ends of the lifting table, and provides the technical effect of allowing the lifting column to be removed without disassembling the tabletop, and facilitating both installation and disassembly. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the connection and fixing device of the present invention applied to a lifting table (the tabletop is omitted; the same applies to the following figures).

[0016] Figure 2 yes Figure 1 A magnified structural diagram of A in the diagram.

[0017] Figure 3 yes Figure 1 The diagram shows the explosive structure of the rectangular outer tube at one end during the installation of the main components of this connection and fixing device. Figure 1 .

[0018] Figure 4 yes Figure 3 A magnified structural diagram of B in the diagram.

[0019] Figure 5 yes Figure 1The diagram shows the explosive structure of the rectangular outer tube at one end during the installation of the main components of this connection and fixing device. Figure 2 .

[0020] Figure 6 yes Figure 4 A magnified structural diagram of C.

[0021] Figure 7 yes Figure 1 A schematic diagram of the end structure after omitting the support plate at one end.

[0022] Figure 8 yes Figure 7 A magnified structural diagram of D in the diagram.

[0023] The diagram shows: 1. Base plate, 2. Motor, 3. Crossbeam, 4. Transmission rod, 5. Support plate, 6. Lifting column, 7. Horizontal elongated through hole, 8. Hook, 9. Vertical plate of the first sheet metal part, 10. Horizontal plate of the first sheet metal part, 11. First sheet metal part, 12. Fixing tube, 13. Lifting tube, 14. Rectangular outer tube, 15. Rectangular inner tube, 16. Second sheet metal part, 17. Third sheet metal part, 18. Inclined surface, 19. Second screw, 20. First screw, 21. Second gap, 22. First through hole, 23. First gap, 24. Horizontal plate of the support plate, 25. Vertical plate of the support plate. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown.

[0026] Existing height-adjustable desks, such as electric height-adjustable desks, generally include a tabletop, a support plate 5, a crossbeam 3, and a lifting column 6. The tabletop is typically fixed to the support plate 5 and / or the crossbeam 3, usually using multiple screws. The crossbeam 3 is a common term, also known as a longitudinal beam, but it refers to a beam extending along the length of the tabletop. The support plate 5 is generally an L-shaped plate, such as a second L-shaped plate. The horizontal plate of the second L-shaped plate is attached to and fixed to the tabletop, while the vertical plate (side plate) is fixed to the lifting column 6 and the crossbeam 3. The bottom end of the lifting column 6 is generally connected to the base plate 1. The lifting column 6 generally includes an outer tube, such as a rectangular lifting tube 13, and an inner tube, such as a rectangular fixing tube 12. The top end of the rectangular lifting tube 13 is fixed to the crossbeam 3 and the support plate 5, while the bottom end of the rectangular fixing tube 12 is fixed to the base plate 1. The motor 2 drives the lead screw in the nut-screw pair to rotate via the transmission rod 4 and the gearbox, which in turn drives the rectangular lifting tube 13 to rise and fall. The support plate 5, crossbeam 3, lifting column 6, and base plate 1 are generally referred to as the table frame. The statement that the tabletop is fixed to the support plate 5 and / or crossbeam 3 using multiple screws should be understood as follows: the tabletop is fixed to the support plate 5 using multiple screws, or the tabletop is fixed to the crossbeam 3 using multiple screws, or the tabletop is fixed to the support plate 5 using multiple screws, and simultaneously the tabletop is also fixed to the crossbeam 3 using multiple screws.

[0027] The supporting plate 5, crossbeam 3, and lifting column 6 of the present invention have a connecting and fixing device, the structure of which is as follows: two sheet metal parts are welded to the inner surface of the supporting plate 5, wherein the first sheet metal part 11 is fastened to one side of the top of the lifting column 6, and the second sheet metal part 16 is screwed to the third sheet metal part 17 welded to the other side of the top of the lifting column 6 by one or more screws passing through the crossbeam 3. The screws are tightened from bottom to top or from outside to inside. "One or more" refers to two, three, four, etc. Two are preferred.

[0028] The first sheet metal part 11 is a vertical plate 9 with a hook 8 at the bottom. The top of the vertical plate 9 also has a horizontal plate 10 in the opposite direction to the hook. The horizontal plate 10 of the first sheet metal part is welded and fixed to the bottom surface of the horizontal plate 24 of the support plate. There is a horizontal elongated through hole 7 on one side wall of the top of the lifting column 6. The hook 8 at the bottom of the vertical plate 9 of the first sheet metal part is fastened in the horizontal elongated through hole 7.

[0029] The specific structure for the first sheet metal part to fasten with the lifting column can also be as follows: The first sheet metal part is a vertical plate with a hook at the bottom, and a horizontal plate at the top of the vertical plate with the opposite direction to the hook. The horizontal plate is welded and fixed to the bottom surface of the horizontal plate or horizontal plate of the support plate. A horizontally elongated fastener is welded to one side wall at the top of the lifting column, and the hook at the bottom of the first sheet metal part fastens into the downward-facing fastening groove of the horizontally elongated fastener. The horizontal plate can also be called a horizontal plate.

[0030] The specific structure for the first sheet metal part to be fastened to the lifting column can also be as follows: the first sheet metal part is a vertical plate with a hook at the bottom end. One end of the vertical plate of the first sheet metal part is welded and fixed to the inner surface of the vertical plate of the support plate. There is a horizontal elongated through hole on one side of the top of the lifting column. The hook at the bottom end of the first sheet metal part is fastened in the horizontal elongated through hole.

[0031] The second sheet metal part 16 is a vertical U-shaped plate with its opening facing the top of the column. One end of the vertical U-shaped plate is welded and fixed to the inner surface of the vertical plate 25 of the support plate. The bottom side plate of the vertical U-shaped plate has one or more first threaded holes. The inner surface is also called the inner wall.

[0032] The third sheet metal part 17 is a first L-shaped plate. The vertical plate of the first L-shaped plate is welded and fixed to the other side wall of the top of the lifting column 6. There is a gap between the upper and lower side plates of the vertical C-shaped plate and the vertical plate of the first L-shaped plate, such as the first gap 23. There is a gap between the lower side plate of the vertical C-shaped plate and the horizontal plate of the first L-shaped plate, such as the second gap 21. The horizontal plate of the first L-shaped plate has one or more first through holes 22 for screws to be screwed into threaded holes, such as the first threaded hole and the second threaded hole described below.

[0033] The crossbeam 3 is preferably a rectangular tube assembly. The rectangular tube assembly preferably includes an inner rectangular tube 15 located at the middle of the tabletop's length and an outer rectangular tube 14 fitted around the end of the inner rectangular tube 15. The end of the outer rectangular tube 14 is inserted into the gaps (e.g., first gap 23) between the upper and lower side plates of the vertical U-shaped plate and the vertical plate of the first L-shaped plate, and the gaps (e.g., second gap 21) between the lower side plate of the vertical U-shaped plate and the horizontal plate of the first L-shaped plate, to limit the outer rectangular tube. The bottom plate at the end of the outer rectangular tube 14 has one or more second through holes and / or one or more second threaded holes. The following sentence should be understood as: the bottom plate at the end of the outer rectangular tube 14 has one or more second through holes, or the bottom plate at the end of the outer rectangular tube 14 has one or more second threaded holes, or the bottom plate at the end of the outer rectangular tube 14 has one or more second through holes, and simultaneously, the bottom plate at the end of the outer rectangular tube 14 has one or more second threaded holes. Figure 4As shown, the second sheet metal part 16, i.e., the bottom side plate of the vertical U-shaped plate, has a first threaded hole. The bottom plate of the rectangular outer tube 14 of the crossbeam 3, near the support plate 5, has a second through hole. The horizontal plate of the first L-shaped plate of the third sheet metal part 17, near the support plate 5, has a first through hole 22. A first screw 20 passes through the first through hole 22 of the horizontal plate of the first L-shaped plate near the support plate 5 and the second through hole of the bottom plate of the rectangular outer tube 14 near the support plate 5, and is screwed into the first threaded hole of the bottom side plate of the vertical U-shaped plate. The bottom plate of the end of the rectangular outer tube 14, away from the support plate 5, has a second threaded hole. The horizontal plate of the first L-shaped plate, away from the support plate 5, has a first through hole 22. A second screw 19 passes through the first through hole 22 of the horizontal plate of the first L-shaped plate away from the support plate 5, and is screwed into the second threaded hole of the bottom plate of the end of the rectangular outer tube 14 away from the support plate 5. The top of the end of the third sheet metal part 17, i.e. the vertical plate of the first L-shaped plate, away from the support plate 5, can be provided with a bevel 18 or a chamfer to facilitate the insertion of the rectangular outer tube.

[0034] The end wall of the rectangular outer tube 14 can abut against the inner side wall of the vertical plate 25 of the support plate.

[0035] The structure of the second sheet metal part, the structure of the third sheet metal part, the structure of the crossbeam, and the connection structure between the three can also have the following variations: For example, the vertical C-shaped plate can be welded and fixed to the bottom surface of the upper side plate and the horizontal plate of the support plate. The end of the crossbeam can be a horizontal C-shaped plate. The end of the horizontal C-shaped plate is inserted into the gap between the upper and lower side plates of the vertical C-shaped plate and the vertical plate of the first L-shaped plate, such as the first gap, and the gap between the lower side plate of the vertical C-shaped plate and the horizontal plate of the first L-shaped plate, such as the second gap. The web of the horizontal C-shaped plate is provided with a second through hole or a second threaded hole. Multiple screws, such as two screws, pass from bottom to top through the multiple through holes of the horizontal plate of the first L-shaped plate welded to the top of the other side of the lifting column, and multiple through holes of the web of the horizontal C-shaped plate, and are screwed into the multiple first threaded holes of the lower side plate of the vertical C-shaped plate. The end wall of the horizontal U-shaped plate abuts against the inner wall of the supporting plate vertical plate.

[0036] The structure of the second sheet metal part, the structure of the third sheet metal part, the structure of the crossbeam, and the connection structure between the three can also be varied as follows: the vertical U-shaped plate of the second sheet metal part can be welded and fixed to the bottom surface of the support plate and the horizontal plate of the support plate; the third sheet metal part can be a horizontal U-shaped plate with the opening facing upward; the inner side plate of the horizontal U-shaped plate is welded and fixed to the other side wall of the top of the lifting column; the outer side plate of the horizontal U-shaped plate abuts against the inner surface of the web of the vertical U-shaped plate; the end of the crossbeam can be a third L-shaped plate, that is, the crossbeams of this scheme can all be third L-shaped plates or several third L-shaped plates can be connected by multiple screws. The inner side of the vertical plate of the third L-shaped plate is in contact with the outer side of the web of the vertical C-shaped plate, and the inner side of the horizontal plate of the third L-shaped plate is in contact with the outer side of the lower plate of the vertical C-shaped plate. The vertical plate of the third L-shaped plate has one or more third through holes, and the web of the vertical C-shaped plate has one or more fourth through holes. The outer side of the horizontal C-shaped plate, with its opening facing upwards, has one or more third threaded holes. One or more screws pass through the third through holes on the vertical plate of the third L-shaped plate and the fourth through holes on the web of the vertical C-shaped plate, and are tightened into the third threaded holes on the outer side of the horizontal C-shaped plate. The end wall of the third L-shaped plate abuts against the inner wall of the vertical plate of the support plate.

[0037] Preferably, there are two lifting columns 6 for the height-adjustable table, and preferably two sets of connecting and fixing devices for the support plate 5, crossbeam 3, and lifting columns 6 are arranged symmetrically at both ends of the length of the height-adjustable table. Each set of connecting and fixing devices is respectively connected to the inner surface of the support plate 5, the two side walls at the top of the lifting column 6, and the outer end of the crossbeam 3.

[0038] Components, structures, or quantities not marked above are not shown in the drawings. The drawings are for illustrative purposes only; in case of any discrepancies between the drawings and the text description, or between the drawings themselves, the text description shall prevail.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A connecting and fixing device for the support plate, crossbeam, and lifting column of a height-adjustable table, characterized in that: Two sheet metal parts are welded to the inner surface of the support plate. The first sheet metal part is fastened to one side of the top of the lifting column, and the second sheet metal part is fixed to the third sheet metal part welded to the other side of the top of the lifting column by one or more screws passing through the crossbeam. The screws are tightened from bottom to top or from outside to inside. The first sheet metal part is a vertical plate with a hook at the bottom. There is also a horizontal plate at the top of the vertical plate with the opposite direction of the hook. The horizontal plate of the first sheet metal part is welded and fixed to the bottom surface of the horizontal plate of the support plate. There is a horizontal elongated through hole on one side wall of the top of the lifting column. The hook at the bottom of the vertical plate of the first sheet metal part is engaged in the horizontal elongated through hole.

2. The supporting plate, crossbeam, and lifting column connecting and fixing device of the lifting table according to claim 1, characterized in that: The second sheet metal part is a vertical U-shaped plate with its opening facing the top of the lifting column. One end of the vertical U-shaped plate is welded and fixed to the inner surface of the vertical plate of the support plate. There are one or more first threaded holes on the bottom side plate of the vertical U-shaped plate.

3. The supporting plate, crossbeam, and lifting column connecting and fixing device of the lifting table according to claim 2, characterized in that: The third sheet metal part is a first L-shaped plate. The vertical plate of the first L-shaped plate is welded and fixed to the other side wall of the top of the lifting column. There is a gap between the upper and lower side plates of the vertical U-shaped plate and the vertical plate of the first L-shaped plate. There is a gap between the lower side plate of the vertical U-shaped plate and the horizontal plate of the first L-shaped plate. The horizontal plate of the first L-shaped plate has one or more first through holes for screws to be screwed into the first threaded hole.

4. The supporting plate, crossbeam, and lifting column connecting and fixing device of the lifting table according to claim 3, characterized in that: The crossbeam is a rectangular tube assembly, which includes a rectangular inner tube located in the middle of the tabletop length and a rectangular outer tube sleeved on the end of the rectangular inner tube. The end of the rectangular outer tube is inserted into the gap between the upper and lower side plates of the vertical U-shaped plate and the vertical plate of the first L-shaped plate, and the gap between the lower side plate of the vertical U-shaped plate and the horizontal plate of the first L-shaped plate to limit the rectangular outer tube. The bottom plate at the end of the rectangular outer tube has one or more second through holes and / or one or more second threaded holes.

5. The supporting plate, crossbeam, and lifting column connecting and fixing device of the lifting table according to claim 4, characterized in that: The end wall of the rectangular outer tube abuts against the inner wall of the vertical plate of the support plate.

6. The support plate, crossbeam, and lifting column connecting and fixing device of the lifting table according to any one of claims 1-5, characterized in that: The lifting table has two lifting columns, and the support plate, crossbeam and lifting column connecting and fixing device are two sets. Each set of connecting and fixing device is connected to the inner surface of the support plate, the two side walls at the top of the lifting column and the outer end of the crossbeam respectively.

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