CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to Chinese Patent Application No. 201810707228.2 with a filing date of Jul. 2, 2018. The content of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference.
TECHNICAL FIELD
The present invention relates to a synchronous lifting mechanism and a table.
BACKGROUND ART
A table as an article for daily use is common in life, work and school learning, a common table is generally formed by fixedly connecting a tabletop with table legs, the lengths of the table legs are fixed, and thus, the height of the whole tabletop is fixed and cannot be adjusted. Along with difference of application environments and due to application demands of different people, requirements for height diversification, the degree of automation and the degree of comfort of the table are higher and higher.
Air springs have been used as the table legs of the table to support the tabletop at present, a control assembly for controlling each air spring to start or close is mounted on the lower surface of the tabletop, each control assembly is connected with a drag line connector (hinged to a connecting assembly) on the connecting assembly through components such as a drag line, the other end of each drag line connector is abutted against the switch of the corresponding air spring, when the table requires to ascend or descend, a user controls the control assemblies to apply power to the drag lines so as to enable the drag line connectors to rotate, thus, the switches of the air springs are turned on, and the air springs ascend or descend according to the intention of the user.
Because all the table legs at the two ends of the table are supported by the air springs, the air springs require to run synchronously when the table is controlled to lift, otherwise the tabletop will be inclined if one side ascends or descends but the other side does not move, for example, when the tabletop requires to descend, a control person applies large downward pressure to one end of the table and applies small downward pressure to the other end of the table, and in the circumstance, the tabletop is inclined most easily.
SUMMARY OF THE INVENTION
The present invention aims to provide a synchronous lifting mechanism and a table, and it can be ensured that a component supported on the synchronous lifting mechanism cannot be inclined.
The technical solution for solving the technical problem is as follows:
the synchronous lifting mechanism comprises a first lifting driver, a second lifting driver, a first inner fixed tube and a second inner fixed tube, and further comprises a synchronizing mechanism which enables the first lifting driver and the second lifting driver to lift synchronously, and the synchronizing mechanism comprises:
a first support connected with a lifting end of the first lifting driver, wherein the first support lifts along with lifting of the first lifting driver;
a second support connected with a lifting end of the second lifting driver, wherein the second support lifts along with lifting of the second lifting driver;
a first flexible traction component, wherein one end of the first flexible traction component is fixedly connected with the second inner fixed tube, and after the first flexible traction component is flexibly matched with one end of the second support, one end of the first support and the other end of the first support, the other end of the first flexible traction component is fixedly connected with the first inner fixed tube; and
a second flexible traction component, wherein one end of the second flexible traction component is fixedly connected with the first inner fixed tube, and after the second flexible traction component is flexibly matched with one end of the first support, one end of the second support and the other end of the second support, the other end of the second flexible traction component is fixedly connected with the second inner fixed tube.
A table comprises a tabletop, and further comprises the synchronous lifting mechanism, and the tabletop is connected with the synchronizing mechanism in the synchronous lifting mechanism.
The present invention has the advantages that when the first lifting driver and the second lifting driver carry out lifting motion, the synchronizing mechanism applies a restraining force to the first lifting driver and the second lifting driver simultaneously, therefore, the circumstance that the first lifting driver lifts too fast relative to lifting of the second lifting driver is avoided, the first lifting driver and the second lifting driver lift synchronously, and it can be ensured that components (such as the tabletop) supported on the synchronous lifting mechanism cannot be inclined.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a structure diagram of a table of the present invention;
FIG. 2 is a schematic diagram after a tabletop is concealed on the basis of FIG. 1;
FIG. 3 is a schematic diagram after a cross beam, a first movable outer tube and a second movable outer tube are concealed on the basis of FIG. 2;
FIG. 4 is a schematic diagram after a first inner tube and a second inner tube are concealed on the basis of FIG. 3;
FIG. 5 is an assembly diagram of a first support as well as a first rotating component, a second rotating component and a third rotating component;
FIG. 6 is an assembly diagram of a second support as well as a fourth rotating component, a fifth rotating component and a sixth rotating component;
FIG. 7 is a schematic diagram of a first connector;
FIG. 8 is a schematic diagram of a second connector;
Reference numerals in FIG. 1 to FIG. 8 are shown below:
- 10 represents a tabletop;
- 20 represents a first supporting component, and 21 represents a second supporting component;
- 30 represents a first lifting driver, 301 represents a first shaft, 31 represents a second lifting driver, and 311 represents a second shaft;
- 40 represents a first support, 401 represents a first hole, 411 represents a first support body, 412 represents a first rotating component, 413 represents a second rotating component, and 414 represents a third rotating component;
- 41 represents a second support, 410 represents a second hole, 421 represents a second support body, 422 represents a fourth rotating component, 423 represents a fifth rotating component, and 424 represents a sixth rotating component;
- 42 represents a first flexible traction component;
- 43 represents a second flexible traction component;
- 50 represents a first inner tube, 51 represents a first connector, 510 represents a first U-shaped connecting portion, and 511 represents a first bent connecting portion;
- 60 represents a second inner tube, 61 represents a second connector, 610 represents a second U-shaped connecting portion, and 611 represents a second bent connecting portion;
- 70 represents a cross beam, 71 represents a first movable outer tube, and 72 represents a second movable outer tube; and
- 80 represents a first friction assembly.
DETAILED DESCRIPTION OF THE INVENTION
First Embodiment
As shown in FIG. 1, a table of the present invention comprises a tabletop 10, a first supporting component 20, a second supporting component 21, a first lifting driver 30, a second lifting driver 31, a first inner fixed tube, a second inner fixed tube and a synchronizing mechanism which enables the first lifting driver and the second lifting driver to lift synchronously, and the various portions and their relationships are illustrated in detail below.
As shown in FIG. 1 and FIG. 2, in one or more embodiments, the first supporting component 20 and the second supporting component 21 are separately positioned below the tabletop 10, the first lifting driver 30 is mounted on the first supporting component 20, the second lifting driver 31 is mounted on the second supporting component 21, the first lifting driver 30 and the second lifting driver 31 are air springs preferably, the structures of the first lifting driver 30 and the second lifting driver 31 and the assembly structures of the first supporting component 20 and the second supporting component 21 are the same as the structure disclosed in a patent with the publication number being CN106308039A preferably, and descriptions thereof are omitted herein. The first lifting driver 30 and the second lifting driver 31 can further be components such as air cylinders or hydraulic cylinders.
As shown in FIG. 2 to FIG. 6, the synchronizing mechanism comprises a first support 40, a second support 41, a first flexible traction component 42 and a second flexible traction component 43, and the structure of the synchronizing mechanism is illustrated in detail below.
As shown in FIG. 2 to FIG. 6, one end of the first support 40 is connected with a lifting end of the first lifting driver 30, the first support 40 lifts along with lifting of the first lifting driver 30, according to a preferable connection mode for the first support 40 and the first lifting driver 30, a first hole 401 is formed in one end of the first support 40, a first mounting hole is formed in the lifting end of the first lifting driver 30, and a first shaft 301 penetrates through the first hole 401 and the first mounting hole, so that the first lifting driver 30 and the first support 40 are connected integrally; and preferably, one portion of the first support 40 is positioned in the first inner fixed tube, and one portion of the first lifting driver 30 is also positioned in the first inner fixed tube. One end of the first inner fixed tube is fixedly connected with the first supporting component 20, and therefore, when the lifting end of the first lifting driver 30 lifts to drive the first support 40 to lift, the first inner fixed tube cannot move.
As shown in FIG. 2 to FIG. 6, the first support 41 comprises: a first support body 411, a first rotating component 412, a second rotating component 413 and a third rotating component 414, the first rotating component 412 is rotatably mounted at one end of the first support body 411, and the second rotating component 413 is rotatably mounted at one end of the first support body 411; and the third rotating component 414 is rotatably mounted at the other end of the first support body 411.
As shown in FIG. 2 to FIG. 6, the cross section of the first support body 411 is U-shaped, preferably, the first support body 411 is a steel channel, the first rotating component 412 and the second rotating component 413 are both positioned in a groove in one end of the first support body 411, the first shaft 301 penetrates through the first rotating component 412 and the second rotating component 413 so that the first rotating component 412 and the second rotating component 413 are supported by the first shaft 301, and the first rotating component 412 and the second rotating component 413 can rotate. But the third rotating component 414 is positioned in a groove in the other end of the first support body 411, and is supported through a first mandrel (not shown), and thus, the third rotating component 414 can rotate. The first rotating component 412, the second rotating component 413 and the third rotating component 414 are one of bearings or rollers or chain wheels.
As shown in FIG. 2 to FIG. 6, one end of the second support 41 is connected with the lifting end of the second lifting driver 31, the second support 41 lifts along with lifting of the second lifting driver 31, according to a preferable connection mode for the second support 41 and the second lifting driver 31, a second hole 410 is formed in one end of the second support 41, a second mounting hole is formed in the lifting end of the second lifting driver 31, and a second shaft 311 penetrates through the second hole 410 and the second mounting hole, so that the second lifting driver 31 and the second support 41 are connected integrally. Preferably, one portion of the second support 41 is positioned in the second inner fixed tube, and one portion of the second lifting driver 31 is also positioned in the second inner fixed tube. One end of the second inner fixed tube is fixedly connected with the second supporting component 21, and therefore, when the lifting end of the second lifting driver 31 lifts to drive the second support 41 to lift, the second inner fixed tube cannot move.
As shown in FIG. 2 to FIG. 6, the second support 42 comprises a second support body 421, a fourth rotating component 422, a fifth rotating component 423 and a sixth rotating component 424, the fourth rotating component 422 is rotatably mounted at one end of the second support body 421, and the fifth rotating component 423 is rotatably mounted at one end of the second support body 421; and the sixth rotating component 424 is rotatably mounted at the other end of the second support body 421.
As shown in FIG. 2 to FIG. 6, the cross section of the second support body 421 is U-shaped, preferably, the second support body 421 is a steel channel, the fourth rotating component 422 and the fifth rotating component 423 are positioned in a groove in one end of the second support body 421, the second shaft 311 penetrates through the fourth rotating component 422 and the fifth rotating component 423 so that the fourth rotating component 422 and the fifth rotating component 423 are supported by the second shaft 311, and the fourth rotating component 422 and the fifth rotating component 423 can rotate. But the sixth rotating component 424 is positioned in a groove in the other end of the second support body 421, and is supported through a second mandrel, and thus, the sixth rotating component 424 can rotate. The fourth rotating component 422, the fifth rotating component 423 and the sixth rotating component 424 are one of bearings or rollers or chain wheels.
As shown in FIG. 2 to FIG. 6, one end of the first flexible traction component 42 is fixedly connected with the second inner fixed tube, and after the first flexible traction component 42 is flexibly matched with one end of the second support 41, one end of the first support 40 and the other end of the first support 41, the other end of the first flexible traction component 42 is fixedly connected with the first inner fixed tube. Preferably, the first flexible traction component 42 is flexibly matched with the fifth rotating component 423, the first rotating component 412 and the third rotating component 414, and the mode of flexible matching is similar to a mode of matching a belt with a belt pulley, namely the first flexible traction component 42 is tensioned by the fifth rotating component 423, the first rotating component 412 and the third rotating component 414.
As shown in FIG. 2 to FIG. 6, one end of the second flexible traction component 43 is fixedly connected with the first inner fixed tube, and after the second flexible traction component 42 is flexibly matched with one end of the first support 40, one end of the second support 41 and the other end of the second support 41, the other end of the second flexible traction component 43 is fixedly connected with the second inner fixed tube. The second flexible traction component is flexibly matched with the second rotating component 413, the fourth rotating component 422 and the sixth rotating component 424, and the mode of flexible matching is similar to the mode of matching a belt with a belt pulley, namely the second flexible traction component 43 is tensioned by the sixth rotating component 424, the second rotating component 413 and the fourth rotating component 422.
As shown in FIG. 2 to FIG. 6, the first inner fixed tube comprises a first inner tube 50 and a first connector 51, one end of the first inner tube 50 is fixed to the first supporting component 20, at least one portion of the first connector 51 is positioned in the first inner tube 50 and is fixed to the first inner tube 50, the first connector 51 consists of a first U-shaped connecting portion 510 and first bent connecting portions 511 formed by bending the two ends of the first U-shaped connecting portion 510, a first through hole is formed in the wall of the first inner tube 50, the first U-shaped connecting portion 510 penetrates through the first through hole and is positioned in the first inner tube 50, and the first bent connecting portions 511 are positioned on the outside of the first inner tube 50 and is fixedly connected with the first inner tube 50.
As shown in FIG. 2 to FIG. 6, the second inner fixed tube comprises a second inner tube 60 and a second connector 61, at least one portion of the second connector 61 is positioned in the second inner tube 60 and is fixed to the second inner tube 60, the second connector 61 consists of a second U-shaped connecting portion 610 and second bent connecting portions 611 formed by bending the two ends of the second U-shaped connecting portion 610, a second through hole is formed in the wall of the second inner tube 60, the second U-shaped connecting portion 610 is positioned in the second inner tube 60 via the second through hole, and the second bent connecting portions 611 are positioned on the outside of the second inner tube 60 and is fixedly connected with the second inner tube 60.
As shown in FIG. 2 to FIG. 8, one end of the first flexible traction component 42 is fixedly connected with the second connector 61, the other end of the first flexible traction component 42 is fixedly connected with the first connector 51, one end of the second flexible traction component 43 is fixedly connected with the first connector 51, and the other end of the second flexible traction component 43 is fixedly connected with the second connector 61. Preferably, one end of the first flexible traction component 42 is fixedly connected with the second U-shaped connecting portion 610 of the second connector 61 through a screw or a pin, the other end of the first flexible traction component 42 is fixedly connected with the first U-shaped connecting portion 510 of the first connector 51 through a screw or a pin, one end of the second flexible traction component 43 is fixedly connected with the first U-shaped connecting portion 510 of the first connector 51 through a screw or a pin, and the other end of the second flexible traction component 43 is fixedly connected with the second U-shaped connecting portion 610 of the second connector 61 through a screw or a pin.
As shown in FIG. 2 to FIG. 6, the first flexible traction component 42 and the second flexible traction component 43 are one of rope-shaped components or band-shaped components or steel wires or chains separately. When the first flexible traction component 42 and the second flexible traction component 43 are the rope-shaped components or the band-shaped components or the steel wires, the first rotating component 412, the second rotating component 413, the third rotating component 414, the fourth rotating component 422, the fifth rotating component 423 and the sixth rotating component 424 are bearings or rollers, and grooves are formed in the outer peripheral surfaces of the bearings or the rollers and are matched with the first flexible traction component 42 and the second flexible traction component 43.
As shown in FIG. 2 to FIG. 6, when the first flexible traction component 42 and the second flexible traction component 43 are chains, the first rotating component 412, the second rotating component 413, the third rotating component 414, the fourth rotating component 422, the fifth rotating component 423 and the sixth rotating component 424 are chain wheels.
As shown in FIG. 2 to FIG. 6, the table of the present invention further comprises a cross beam 70, a first movable outer tube 71 and a second movable outer tube 72, one end of the cross beam 70 is fixed to the lifting end of the first lifting driver 30, and the other end of the cross beam 70 is fixed to the lifting end of the second lifting driver 31; and the cross beam 70 is connected with the first shaft 301, thus, when the lifting end of the first lifting driver 30 and the lifting end of the second lifting driver 31 lift, the cross beam 70 lifts along with the first lifting driver 30 and the second lifting driver 31.
As shown in FIG. 2 to FIG. 6, one end of the first movable outer tube 71 is fixed to one end of the cross beam 70, and the first movable outer tube 71 lifts along with lifting of the cross beam 70. The first movable outer tube 71 is sleeved over the first inner fixed tube, namely the first movable outer tube 71 is sleeved over the first inner tube 50, a first friction assembly 80 is mounted on the first inner tube 50, and preferably, the first friction assembly 80 is fixed to the outer peripheral surface of the other end of the first inner tube 50, is matched with the inner wall surface of the first movable outer tube 71, and guides lifting of the first movable outer tube 71. A second friction assembly is mounted on the inner peripheral surface of the other end of the first movable outer tube 71, is matched with the outer peripheral surface of the first inner tube 50, and guides lifting of the first movable outer tube 71, the first friction assembly 80 and the second friction assembly not only can be rolling friction assemblies, but also can be sliding friction assemblies, and the structure of the first friction assembly 80 and the structure of the second friction assembly are the same as the structure disclosed in the patent with the publication number being CN106308039A, and descriptions thereof are omitted herein.
As shown in FIG. 2 to FIG. 6, one end of the second movable outer tube 72 is fixed to the other end of the cross beam 70, and the second movable outer tube 72 lifts along with lifting of the cross beam 70. The second movable outer tube 72 is sleeved over the second inner fixed tube. The second movable outer tube 72 is sleeved over the second inner tube 60, a third friction assembly is mounted on the second inner tube 60, and preferably, the third friction assembly is fixed to the outer peripheral surface of the other end of the second inner tube 60, is matched with the inner wall surface of the second movable outer tube 72, and guides lifting of the second movable outer tube 72. A fourth friction assembly is mounted on the inner peripheral surface of the other end of the second movable outer tube 72, is matched with the outer peripheral surface of the second inner tube 60, and guides lifting of the second movable outer tube 72, the third friction assembly and the fourth friction assembly not only can be rolling friction assemblies, but also can be sliding friction assemblies, and the structure of the third friction assembly and the structure of the fourth friction assembly are the same as the structure disclosed in the patent with the publication number being CN106308039A, and descriptions thereof are omitted herein.
The tabletop 10 is fixed to the synchronizing mechanism in the synchronous lifting mechanism. The tabletop 10 is fixed to the cross beam 70 in the synchronizing mechanism.
The working process of the present invention is as follows: when the tabletop of the table requires to ascend, the first lifting driver 30 and the second lifting driver 31 are started through a switch, the first lifting driver 30 transmits power to the first shaft 301, the second lifting driver 31 transmits power to the second shaft 311, the first shaft 301 and the second shaft drive the cross beam 70, the tabletop 10, the first support body 411 and the second support body 421 to ascend, the first rotating component 412 and the second rotating component 413 are connected with the first support body 411 through the first shaft 301, the third rotating component 414 is connected with the first support body 411 through a first mandrel, the fourth rotating component 422 and the fifth rotating component 423 are connected with the second support body 421 through the second shaft 311, the sixth rotating component 424 is connected with the first support body 421 through a second mandrel, therefore, when the first support body 411 and the second support body 421 ascend, the first rotating component 412, the second rotating component 413 and the third rotating component 414 ascend along with the first support body 411, the third rotating component 422, the fifth rotating component 423 and the fourth rotating component 424 ascend along with the first support body 421, but the first connector 51 and the second connector 61 cannot move, at the moment, the distance between the first connector 51 and the third rotating component 414 is shortened, the distance between the second connector 61 and the sixth rotating component 424 is shortened, the first rotating component 412 and the fifth rotating component 423 apply an upward tensile force to the first flexible traction component 42, the first flexible traction component 42 is forced to move in a direction from the first rotating component 412 to the direction in which the fifth rotating component 423 is located, the second rotating component 413 and the fourth rotating component 422 apply an upward tensile force to the second flexible traction component 43, the second flexible traction component 43 is forced to move in a direction from the fourth rotating component 422 to the direction in which the second rotating component 413 is located, and thus, when the first lifting driver 30 and the second lifting driver 31 ascend, the first flexible traction component 42 and the second flexible traction component 43 restrain the first lifting driver 30 and the second lifting driver 31 so that the first lifting driver 30 and the second lifting driver 31 ascend synchronously. On the contrary, when the first lifting driver 30 and the second lifting driver 31 descend, similarly, the first flexible traction component 42 and the second flexible traction component 43 restrain the first lifting driver 30 and the second lifting driver 31 so that the first lifting driver 30 and the second lifting driver 31 descend synchronously.
Second Embodiment
The present invention is not limited to the embodiment, for example, arc-shaped grooves are separately formed in two ends of the first support 40 and two ends of the second support 41, and the first flexible traction component 42 and the second flexible traction component 43 are separately matched with the grooves of the first support and the second support. In the mode, the first rotating component 412, the second rotating component 413 and the third rotating component 414 do not need to be mounted on the first support 40, and the fourth rotating component 422, the fifth rotating component 423 and the sixth rotating component 424 do not need to be mounted on the second support 41 either. By the mode, when the first flexible traction component 42 and the second flexible traction component 43 are band-shaped components or rope-shaped components, the first flexible traction component 42 is in surface contact with the first support 40 and the second support 41, and when the first flexible traction component 42 moves, surface-to-surface frictional forces are formed between the first flexible traction component 42 and the first support 40 as well as the second support 41 and between the second flexible traction component 43 and the first support 40 as well as the second support 41. When the first flexible traction component 42 and the second flexible traction component 43 are steel wires, the first flexible traction component 42 is in wire-surface contact with the first support 40 and the second support 41, and when the first flexible traction component 42 moves, wire-to-surface frictional forces are formed between the first flexible traction component 42 and the first support 40 as well as the second support 41 and between the second flexible traction component 43 and the first support 40 as well as the second support 41. In the mode, regardless of whether the first flexible traction component 42 and the second flexible traction component 43 are band-shaped components or rope-shaped components or steel wires, the frictional forces between the first flexible traction component 42 and the first support 40 as well as the second support 41 and between the second flexible traction component 43 and the first support 40 as well as the second support 41 during movement of the first flexible traction component 42 and the second flexible traction component 43 are greater than the frictional forces in the first embodiment, and therefore, the structure in the first embodiment is adopted preferably in actual use.
The embodiments illustrate that the synchronous lifting device of the present invention is suitable for a table, however, the synchronous lifting device of the present invention is not limited to be used on the table, and it can further be used on a chair or used in a situation requiring lifting.
Patent Application
20200163451
