Drive table lifting mechanism

Abstract

This invention relates to a mechanism for driving a tabletop lifting mechanism. The mechanism comprises a liftable tabletop positioned between two symmetrically arranged vertical supports. One side is a lifting drive support, and the other side is a lifting driven support. The two sides form a synchronous transmission structure through connecting rods, preventing tilting and maintaining horizontal stability during tabletop lifting. A spring energy storage device is installed outside the support shaft. A torsion spring coil accumulates elastic torque during tabletop lifting and releases the stored energy during reverse lifting to provide auxiliary power, making the lifting operation more effortless and smooth. This invention improves the stability of the lifting mechanism and reduces electricity costs, thus enhancing the usability and cost-saving practicality of tabletop lifting.

Claims

1. A tabletop lifting mechanism, comprising: two symmetrically arranged vertical supports, each support defining a lifting drive support and a lifting driven support, wherein a tabletop capable of lifting is disposed between the two supports; wherein, The lifting drive bracket and the lifting driven bracket each include a fixed bracket and a lifting bracket that can slide relative to the fixed bracket. Each lifting bracket is connected to both sides of the tabletop. A drive shaft is symmetrically arranged inside each fixed bracket of the lifting drive bracket and the lifting driven bracket. A connecting rod that allows synchronous shaft rotation is bridged between the two drive shafts. Each drive shaft has a first drive section, which is a shaft assembly connecting a first sprocket and a second sprocket. A chain meshes between the first sprocket and the second sprocket, and a connecting member is fixed at a predetermined position on the chain, so that each connecting member is correspondingly assembled on both sides of the lifting bracket opposite to the tabletop. The drive shaft of the lifting drive bracket further includes a second drive section, which is a shaft-driven support shaft. A first coupling and a second coupling are pivotally mounted at the two free ends of the support shaft. The first coupling is fixed to one end of the support shaft by a connecting pin. The outer edge of the support shaft is vertically fitted into the inner cavity of a spring energy storage device. The spring energy storage device is in the form of a helical spring and has at least one torsion spring segment. One end of the spring energy storage device is fixed to the first coupling member, and at least one bearing is rotatably assembled on the support shaft. When the drive shaft drives the support shaft to rotate, the first coupling member drives the spring energy storage device to generate torsion, so that the spring energy storage device stores elastic force and accumulates elastic force to form a lifting power source, which is then released to the drive shaft located between the lifting drive bracket and the lifting driven bracket to drive the table to perform lifting and lowering operations.

2. The table lifting mechanism as described in claim 1, wherein an end face bracket is further provided between the lifting drive bracket and the lifting driven bracket, and a set of components is provided at the bottom of the fixed brackets provided by the lifting drive bracket and the lifting driven bracket, so that each set of components is respectively assembled into a leg.

3. The table lifting mechanism as described in claim 1, wherein the first sprocket is pivotally mounted on a central shaft element, and the first sprocket has equal portions of first teeth arranged around its periphery, each of the first teeth being engaged with the chain; and the second sprocket is pivotally mounted on the first transmission section of the transmission shaft, and the second sprocket has equal portions of second teeth arranged around its periphery, each of the second teeth being engaged with the chain.

4. The table lifting mechanism as described in claim 1, wherein a connecting part is provided on each side of the linkage member into which the chain is embedded, so that each connecting part is further inserted and fixed inside the chain.

5. The table lifting mechanism as described in claim 1, wherein a second coupling is pivotally mounted at the bottom of the support shaft, and a relay pivot shaft is internally connected to the second coupling; an external thread section is arranged around the outer edge of the support shaft corresponding to the second coupling, and an internal thread section that can mesh with the external thread section is provided on the second coupling corresponding to the external thread section, so that the external thread section and the internal thread section together form a spiral guide device; a stepped surface is provided on the support shaft corresponding to the relay pivot shaft, and a first bearing is pivotally mounted between the stepped surface and the relay pivot shaft; the relay pivot shaft has a shaft rotation space inside, and the support shaft extends axially toward the shaft rotation space to form a shaft extension section with a smaller diameter, and a second bearing is provided on the shaft rotation space relative to the bottom of the relay pivot shaft, and the shaft extension section pivotally passes through the second bearing; The fixed bracket has a second bearing fixed inside relative to the relay pivot shaft. A third bearing is located on the upper end of the second bearing relative to the relay pivot shaft, with its upper surface pivotally contacting the bottom surface of the second coupling. A fourth bearing is located on the lower end of the second bearing relative to the relay pivot shaft. A worm gear element is formed around the lower end of the relay pivot shaft, with one side of the worm gear element meshing with a worm. A torque adjustment hole is provided on the outer wall of the fixed bracket corresponding to the worm element, allowing a tool to drive the worm element through the torque adjustment hole. The lower surface of the fourth bearing pivotally contacts the end of the relay pivot shaft. A third bearing is fixed inside the fixed bracket relative to the bottom side of the relay pivot shaft. The third bearing has a bearing hole for a coupling device. A fifth bearing is located at the top of the coupling device, with its upper surface pivotally contacting the bottom end of the relay pivot shaft. The shaft extension passes through the coupling device, and the bottom end of the shaft extension has a combined hole, which is used to fix a first bevel gear by a combined element; the second transmission section of the transmission shaft is fixed with a second bevel gear, which drives the first bevel gear by the rotation of the transmission shaft, thereby causing the support shaft to rotate; the first coupling of the support shaft has a fixed assembly hole, which allows the free end of the spring energy storage device to extend and engage; the top end of the support shaft has a shaft end, and a first bearing is fixed inside the fixed bracket relative to the shaft end, with an end bearing fixed inside the first bearing, allowing the shaft end to extend and pivotally mount inside the end bearing; the first transmission section of the transmission shaft has a non-circular groove, which houses and fixes a non-circular end of a transmission component, with a transmission end at one end of the transmission component, which fixes one end of the connecting rod. The transmission end of the transmission component is provided with a multi-angle drive joint, which is connected to one end of a drive cable for pivoting. The other end of the drive cable is connected to a control host, which is provided with a drive switch located at an appropriate position on the bottom side of the table.

6. The table lifting mechanism as described in claim 5, wherein a positioning hole is provided on one side of the coupling device, the positioning hole is used for braking positioning of a braking end of a braking device, and an elastic limiting end is provided on one side of the braking end, and a control element is connected to one end of the elastic limiting end.

7. The table lifting mechanism as described in claim 1, wherein the spring energy storage device has a plurality of torsion spring segments, and each torsion spring segment is alternately provided with a support spring segment, and each torsion spring segment and each support spring segment are integrally formed; wherein the support spring segment has a smaller diameter relative to the torsion spring segment and is in contact with the peripheral wall surface of the support shaft, so that when the spring energy storage device stores torsion energy, the torsion spring segment bears a larger torsional load, while the support spring segment provides a rotational support function.

8. The table lifting mechanism as described in claim 1, wherein the first sprocket of the lifting driven bracket is pivotally mounted on a central shaft element, the first sprocket has equal portions of first teeth arranged around its periphery, and each of the first teeth is respectively engaged with the chain; the second sprocket is pivotally mounted on the drive shaft, the second sprocket has equal portions of second teeth arranged around its periphery, and each of the second teeth is respectively engaged with the chain; a connecting portion is provided on both sides of the linkage member to which the chain is embedded and fixed, so that each connecting portion is further inserted and fixed inside the chain.

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