Height-adjustable table

Abstract

A rapidly mountable height-adjustable table, comprising a table board (1), at least two table feet (2), and at least two columns (3), wherein the table board (1) is mounted on the columns (3); the columns (3) protrude upwards from the table board (1); the table feet (2) are mounted below the columns (3); a lifting push rod (4) and a driving device are arranged in each column (3); the driving device is in transmission connection with the lifting push rod (4), and is mounted inside the column (3); the driving device drives the lifting push rod (4) to move; and the lifting push rod (4) drives the column (3) to extend and retract and drive the table board (1) to ascend and descend. Lifting push rods (4) and driving devices are all located inside columns (3); therefore, it is unnecessary for components related to transmission to cooperate with components outside the columns (3); and since the columns (3) are packaged and delivered after being assembled by manufacturers, it is unnecessary for a consumer to mount the lifting push rods (4) and the driving devices that are located in the columns (3), reducing the assembly difficulty for the consumer, and greatly reducing the complexity during a mounting process, and thus mounting the height-adjustable table more rapidly and easily.

Description

height adjustable desk Technical Field

[0001] The present invention relates to the field of furniture, and in particular to a lifting table. Background Art

[0002] Whether in office study or daily life, tables are always the most frequently used furniture, and there is always a steady demand for them in the market. However, the market share of traditional tables is now facing saturation, and more and more manufacturers are turning their attention to the rising rise of lift tables. In order to meet people's increasing health and functional needs and to better adapt to people of different heights, manufacturers have developed lift tables with liftable table tops. Generally speaking, lift tables are driven by their retractable legs to lift the table tops, and the structures of these lift tables are also similar. From top to bottom, they are table tops, beams, legs and feet. The lower ends of the legs are connected to the feet, and the upper ends of the legs are inserted in the beams. The table top is installed on the beams, and the feet and legs can lift and support the beams and table top.

[0003] However, the lifting table with the above structure has the following problems: First, the table legs are connected to the bottom of the beam, and the table top is installed above the beam. The table top is restricted by the beam and can only be at the upper end of the table legs; Second, the installation of the beam makes the overall installation operation of the lifting table more complicated and cumbersome; It will also lead to: Third, since the screw-nut mechanism is arranged in the table legs, a gear box is provided at the upper end of the table legs, and the motor and the transmission hexagonal rod are all installed in the beam. In order to reduce packaging and transportation costs, the manufacturer separates the table legs and the beam, so the table legs and the beam often need to be installed by consumers themselves. When the upper end of the table leg is inserted into the beam, the transmission hexagonal rod and the gear box are difficult to achieve quick matching, making the installation process difficult and complicated. Technical Solutions

[0004] In order to solve the above-mentioned technical problems, the present invention provides a lifting table, including a table top, table legs and a column. The table top is installed on the column and the column protrudes upward from the table top. The table legs are installed at the lower end of the column. A lifting push rod and a driving device are provided in the column. The lifting push rod and the driving device are both located inside the column, so the transmission-related components no longer need to cooperate with the components outside the column. Since the column is packaged and shipped after being assembled by the manufacturer, consumers do not need to install the lifting push rod and the driving device located in the column, which reduces the assembly difficulty for consumers and greatly simplifies the complexity of the installation process, thereby achieving a faster and simpler installation of the lifting table.

[0005] The technical solution of the present invention is achieved as follows:

[0006] A lifting table includes a table top, at least two table legs and at least two columns; the table top is mounted on the columns and the columns protrude upward from the table top, and the table legs are mounted below the columns; a lifting push rod and a driving device are provided in the columns, the driving device is connected to the lifting push rod in a transmission manner, and the driving device is installed inside the columns; the driving device drives the lifting push rod to move, and the lifting push rod drives the columns to extend and retract and drives the table top to rise and fall.

[0007] The lifting push rod and drive device are both located inside the column, so the transmission-related components no longer need to cooperate with the components outside the column. Since the column is packaged and shipped after being assembled by the manufacturer, consumers do not need to install the lifting push rod and drive device located in the column, which reduces the assembly difficulty for consumers and greatly simplifies the complexity of the installation process, making the installation of the lifting table faster and simpler.

[0008] Preferably, the column comprises an inner tube and an outer tube, the outer tube being sleeved on and positioned above the inner tube; the table top being connected to the outer tube, and the drive device being fixedly connected to one of the inner tube or the outer tube. The column is in an inverted form, so that the table top is mounted on the outer tube. When the column is fully retracted, that is, when the inner tube is fully inserted into the outer tube, a portion of the outer tube can still protrude upward from the table top. If the table top is mounted on the inner tube, and a portion of the inner tube protrudes upward from the table top, the inner tube cannot fully enter the outer tube, which is not conducive to reducing packaging and transportation costs and will result in a smaller travel range of the lifting table. Therefore, an inverted column is used to solve these problems.

[0009] Preferably, the driving device is located at the upper end of the column and is fixedly connected to the outer tube.

[0010] Preferably, the driving device is located at the lower end of the column and fixedly connected to the inner tube, so that the center of gravity of the column is close to the table foot, and the stability is high.

[0011] Preferably, the driving device is a planetary reduction motor. The straight cylindrical form of the planetary reduction motor enables the planetary reduction motor to be completely inserted into the interior of the column.

[0012] Preferably, a clutch is provided between the drive unit and the lift rod. The clutch comprises a torsion spring and a spring seat. The torsion spring is mounted on the spring seat, one end of which is connected to the drive unit, and the spring seat is mounted on the lift rod. The clutch is configured such that when the lift rod is in a downward trend, the torsion spring grips the spring seat. The clutch increases the self-locking force when the lift rod is in a downward trend, preventing the table top from automatically descending under load, thereby maintaining the table top at its raised or lowered height.

[0013] Preferably, a bearing and a bearing seat for mounting the bearing are provided between the drive unit and the lifting push rod. The lifting push rod includes a screw connected to the drive unit, which drives the screw to rotate. The bearing is sleeved on the screw and mounted in the bearing seat, which is fixedly connected to the drive unit. The clutch is disposed on the side of the bearing seat away from the drive unit. One of the torsion spring's torsion arms is disposed on the bearing seat, and the spring seat is disposed on the screw and rotates synchronously with the screw. One of the torsion spring's torsion arms is disposed on the bearing seat to maintain circumferential fixity. The spring seat is connected to the screw and rotates circumferentially with the screw. Rotation of the spring seat causes the torsion spring to expand or contract. When the torsion spring expands, the clutch does not provide self-locking force, allowing the table top to rise easily. When the torsion spring contracts, the torsion spring grips the spring seat, providing a self-locking force that prevents the screw from rotating and the table top from descending.

[0014] Preferably, a connecting seat is convexly provided on the bearing seat, a slot is provided in the middle of the connecting seat, and the torsion arm is arranged in the slot. The torsion arm is connected to the bearing seat by inserting the torsion arm into the slot of the connecting seat.

[0015] Preferably, an extension piece is mounted on the upper end of the column, which is detachably connected to the column. The extension pieces on both columns protrude from the column in the same direction. The extension piece can be used to extend the module of the lifting table, extending other functional modules on the lifting table.

[0016] Preferably, a partition is detachably mounted on the extension. The partition is a functional module that can be connected to the extension, which can be used to separate office spaces and also provide a place for users to place objects. Beneficial effects

[0017] The design starting point, concept and beneficial effects of the present invention using the above technical solution are:

[0018] The lifting push rod and drive device are both located inside the column, so the transmission-related components no longer need to cooperate with the components outside the column. Since the column is packaged and shipped after being assembled by the manufacturer, consumers do not need to install the lifting push rod and drive device located in the column, which reduces the assembly difficulty for consumers and greatly simplifies the complexity of the installation process, making the installation of the lifting table faster and simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic diagram of the three-dimensional structure of the lifting table in an embodiment of the present invention;

[0020] FIG2 is a side view of the lifting table when installed in an embodiment of the present invention;

[0021] FIG3 is a schematic diagram of a three-dimensional structure in which a connecting block is welded to a column in an embodiment of the present invention;

[0022] FIG4 is a cross-sectional view of a planetary reduction motor and a lifting push rod installed inside a column in an embodiment of the present invention;

[0023] FIG5 is a schematic diagram of the three-dimensional structure of the planetary reduction motor and the lifting push rod when they are installed in an embodiment of the present invention.

[0024] The figures are marked as follows: table top 1; table leg 2; column 3; inner tube 31; outer tube 32; lifting push rod 4; screw rod 41; planetary reduction motor 5; table frame 6; beam frame 61; connecting block 62; bearing 7; bearing seat 8; torsion spring 9; torsion arm 91; spring seat 10; connecting seat 11; slot 12; extension piece 13; partition 14. Modes for Carrying Out the Invention

[0025] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] The specific implementation of the present invention is as follows:

[0029] As shown in Figures 1-5, the present invention provides a lifting table, including a table top 1, at least two table legs 2 and at least two columns 3; the table top 1 is installed on the columns 3 and the columns 3 protrude upward from the table top 1, and the table legs 2 are installed below the columns 3; a lifting push rod 4 and a driving device are provided in the column 3, the driving device is connected to the lifting push rod 4 by transmission, and the driving device is installed inside the column 3; the driving device drives the lifting push rod 4 to move, and the lifting push rod 4 drives the column 3 to extend and retract and drives the table top 1 to rise and fall.

[0030] The lifting push rod 4 and the driving device are both located inside the column 3, so the transmission-related components no longer need to cooperate with the components outside the column 3. Since the column 3 is packaged and shipped after being assembled by the manufacturer, consumers do not need to install the lifting push rod 4 and the driving device located in the column 3, which reduces the assembly difficulty for consumers and greatly simplifies the complexity of the installation process, thereby achieving faster and simpler installation of the lifting table.

[0031] Specifically, as shown in Figures 3 and 4, the column 3 includes an inner tube 31 and an outer tube 32. The outer tube 32 is sleeved on the inner tube 31 and is located above the inner tube 31. The table top 1 is connected to the outer tube 32. The driving device is a planetary reduction motor 5. The planetary reduction motor 5 is located at the lower end of the column 3 and is fixedly connected to the inner tube 31. The planetary reduction motor 5 is straight-cylinder-shaped, and the inner tube 31 and the outer tube 32 of the column 3 are circular or elliptical. In this embodiment, the inner tube 31 and the outer tube 32 are circular, so that the planetary reduction motor 5 can be completely inserted into the interior of the column 3 in accordance with the shape of the column 3. It will not protrude outward or be connected to other transmission mechanisms. At the same time, the table leg 2 does not need to leave space for installing the planetary reduction motor 5, thereby reducing the thickness of the table leg 2 and simplifying the connection structure between the column 3 and the table leg 2; the lower end of the column 3 is directly fixed to the table leg 2 by bolts. Specifically, the table leg 2 is a hollow shell member, and the column 3 and the table leg 2 are installed by bolts passing through the table leg 2 from bottom to top; there is no need to align the hexagonal rod or the motor, and the installation difficulty is greatly reduced. While ensuring that the column 3 is noiseless, there will be no noise generated by transmission mismatch after the column 3 and the table leg 2 are installed.

[0032] Of course, the planetary reduction motor 5 can also be installed on the upper end of the column 3 and fixedly connected to the inner tube 31. In this embodiment, the planetary reduction motor 5 is installed at the lower end of the column 3 because when the planetary reduction motor 5 is installed at the lower end of the column 3, the center of the column 3 is lower and close to the table leg 2, which makes the lifting table more stable; the column 3 is in an inverted form, so that the table board 1 is installed on the outer tube 32. When the column 3 is fully retracted, that is, the inner tube 31 completely enters the outer tube 32, the outer tube 32 can still have a section protruding upward from the table board 1; if the table board 1 is installed on the inner tube 31, and the inner tube 31 has a section protruding upward from the table board 1, then the inner tube 31 cannot completely enter the outer tube 32. On the one hand, it is not conducive to reducing packaging and transportation costs, and on the other hand, it will cause the lifting table to have a smaller stroke; therefore, an inverted column 3 is used to solve these problems.

[0033] Furthermore, as shown in Figures 2 and 3, the table top 1 is connected to the column 3 through the table frame 6. The table frame 6 includes a crossbeam frame 61 and a connecting block 62. There are two connecting blocks 62, one in front and one in the back, which are welded to the column 3 respectively, and the connecting block 62 is located in the middle of the crossbeam frame 61. The crossbeam frame 61 and the connecting block 62 are connected by bolts, and the table top 1 is installed on the table frame 6.

[0034] Of course, a simple method may also be used, such as welding a connecting ear (not shown) on the wall of the outer tube 32 , and connecting the table top to the connecting ear via a connector and screws.

[0035] Furthermore, as shown in Figures 4 and 5, a clutch, a bearing 7 and a bearing seat 8 for installing the bearing 7 are also provided between the planetary reduction motor 5 and the lifting push rod 4. The lifting push rod 4 includes a screw rod 41 that is transmission-connected to the planetary reduction motor 5, and the planetary reduction motor 5 can drive the screw rod 41 to rotate; the planetary reduction motor 5 and the lifting push rod 4 are provided with a bearing 7, a bearing seat 8 and a clutch from bottom to top; the bearing 7 is sleeved on the screw rod 41 and installed in the bearing seat 8, and the bearing seat 8 is fixedly connected to the planetary reduction motor 5 by bolts; the clutch is provided on the side of the bearing seat 8 away from the planetary reduction motor 5, that is, above the bearing seat 8, the clutch includes a torsion spring 9 and a spring seat 10, the torsion spring 9 is sleeved on the spring seat 10, and the torsion spring 9 is connected to the planetary reduction motor 5 by being connected to the bearing seat 8, and the torsion spring 9 is circumferentially stationary with the planetary reduction motor 5; specifically, a connecting seat 11 is protruding upward on the bearing seat 8, and the connecting seat 11 A slot 12 is provided on the top, and one of the torsion arms 91 of the torsion spring 9 is arranged in the slot 12, thereby connecting to the bearing seat 8; the spring seat 10 is installed on the lifting push rod 4, and the screw rod 41 is inserted in the spring seat 10, and the spring seat 10 rotates synchronously with the screw rod 41 in the circumferential direction; the clutch is configured so that when the lifting push rod 4 has a downward trend, the torsion spring 9 holds the spring seat 10 tightly; the clutch can increase the self-locking force when the lifting push rod 4 has a downward trend, preventing the table board 1 from falling by itself due to load, thereby keeping the table board 1 at the height after lifting; one torsion arm 91 of the torsion spring 9 is set on the bearing seat 8 and remains circumferentially fixed, the spring seat 10 is connected to the screw rod 41 and rotates circumferentially with the screw rod 41. When the spring seat 10 rotates, it will drive the torsion spring 9 to expand or contract. When the torsion spring 9 expands, the clutch does not provide self-locking force, and the table board 1 rises easily. When the torsion spring 9 contracts, the torsion spring 9 holds the spring seat 10 tightly to provide self-locking force, preventing the screw rod 41 from rotating and preventing the table board 1 from falling.

[0036] Furthermore, as shown in Figures 1 and 2, an extension piece 13 is installed on the upper end of the column 3, and the extension piece 13 is detachably connected to the column 3; the extension pieces 13 on the two columns 3 protrude from the column 3 in the same direction, and the extension piece 13 can be used for module extension of the lifting table, extending other functional modules on the lifting table; a partition 14 is detachably installed on the extension piece 13, and the partition 14 is a functional module that can be connected to the extension piece 13. On the one hand, it can be used to separate the office space, and on the other hand, it can also be used for users to place objects.

Claims

1. A lifting table, characterized in that: It includes a table top, at least two table legs and at least two columns; the table top is installed on the columns and the columns protrude upward from the table top, and the table legs are installed below the columns; a lifting push rod and a driving device are provided in the columns, the driving device is connected to the lifting push rod in a transmission manner, and the driving device is installed inside the columns; the driving device drives the lifting push rod to move, and the lifting push rod drives the columns to extend and retract and drives the table top to rise and fall.

2. The lifting table according to claim 1, characterized in that: The column comprises an inner tube and an outer tube, wherein the outer tube is sleeved on the inner tube and is located above the inner tube; the table top is connected to the outer tube, and the driving device is fixedly connected to one of the inner tube or the outer tube.

3. The lifting table according to claim 2, characterized in that: The driving device is located at the upper end of the column and is fixedly connected to the outer tube.

4. The lifting table according to claim 2, characterized in that: The driving device is located at the lower end of the column and is fixedly connected to the inner tube.

5. The lifting table according to claim 1, characterized in that: The driving device is a planetary reduction motor.

6. The lifting table according to claim 1, characterized in that: A clutch is provided between the driving device and the lifting push rod; the clutch comprises a torsion spring and a spring seat, the torsion spring is sleeved on the spring seat, one end of the torsion spring is connected to the driving device, and the spring seat is installed on the lifting push rod; the clutch is configured so that when the lifting push rod has a downward trend, the torsion spring holds the spring seat tightly.

7. The lifting table according to claim 6, characterized in that: A bearing and a bearing seat for mounting the bearing are also provided between the driving device and the lifting push rod. The lifting push rod includes a screw rod which is transmission-connected to the driving device. The driving device drives the screw rod to rotate. The bearing sleeve is arranged on the screw rod and installed in the bearing seat, and the bearing seat is fixedly connected to the driving device; the clutch is arranged on the side of the bearing seat away from the driving device, one of the torsion arms of the torsion spring is arranged on the bearing seat, and the spring seat is arranged on the screw rod and rotates synchronously with the screw rod.

8. The lifting table according to claim 7, characterized in that: A connecting seat is convexly arranged on the bearing seat, a clamping groove is opened in the middle of the connecting seat, and the torsion arm is arranged in the clamping groove.

9. The lifting table according to claim 1, characterized in that: An extension piece is installed at the upper end of the column, and the extension piece is detachably connected to the column; the extension pieces on the two columns protrude from the columns in the same direction.

10. The lifting table according to claim 9, characterized in that: A partition is detachably mounted on the extension piece.

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