Three-stand-column lifting table assembly driven by single motor

Abstract

The utility model relates to a three-stand-column lifting table assembly driven by a single motor, which is characterized in that the three-stand-column lifting table assembly comprises a table board, a plurality of lifting columns are arranged at the bottom of the table board and distributed according to a triangular structure so as to stably support the table board, and the lifting columns comprise fixed stand columns and sliding stand columns. The periphery of the fixed stand column is sleeved with the sliding stand column, the sliding stand column can slide along the fixed stand column, lifting transmission devices are arranged in the sliding stand column, a power output device is arranged below the table plate, and the power output device is used for transmitting power to the lifting transmission devices so as to drive the lifting columns to ascend and descend synchronously. A sliding guide device is arranged between the fixed stand column and the sliding stand column and used for reducing friction force generated between the fixed stand column and the sliding stand column when the sliding stand column slides along the fixed stand column so as to ensure the lifting stability of the table board. The lifting table has the following advantage and effect that the lifting stability of the table plate can be improved.

Description

Technical Field

[0001] This utility model relates to the field of electric height-adjustable desk technology, specifically to a three-column height-adjustable desk assembly driven by a single motor. Background Technology

[0002] Automatic height-adjustable desks use a motor to raise and lower the desktop, allowing users to alternate between sitting and standing, thus avoiding the health risks associated with prolonged sitting.

[0003] Currently, the most common types of height-adjustable desks on the market are three-column height-adjustable desks and two-column height-adjustable desks. Three-column height-adjustable desks have higher stability than two-column height-adjustable desks, but their transmission structure is more complex and their overall cost is higher.

[0004] For example, Chinese patent document CN221330558U discloses a frame for a three-column height-adjustable desk. This frame includes: a first column, a second column, and a third column. The second column is connected to the first column and the third column respectively through two crossbeams. A drive motor is mounted on one of the crossbeams, with one end of its drive shaft extending into an adjacent column and the other end connected to another column connected to the crossbeam through a first coupling. The two columns connected by the other crossbeam are connected by a second coupling.

[0005] In the above technical solution, a single motor drives each coupling to rotate under the action of the transmission structure, so as to transmit power to each column, thereby driving the lead screw in the column to rotate, so that the outer tube can slide along the inner tube to realize the lifting and lowering of the column. However, when the outer tube slides along the inner tube, the friction generated between the two is mainly sliding friction. Therefore, the friction force experienced by the column during lifting and lowering is large, which affects the stability of the column lifting and lowering. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a single motor driven three-column lifting table assembly, which can improve the stability of table lifting.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a single-motor driven three-column lifting desk assembly, including a desk panel, with lifting columns at the bottom of the desk panel. Multiple lifting columns are arranged in a triangular structure to provide stable support for the desk panel. Each lifting column includes a fixed column and a sliding column. The sliding column is fitted around the fixed column and can slide along it. A lifting transmission device is installed inside the sliding column. A power output device is located below the desk panel to transmit power to each lifting transmission device, thereby driving each lifting column to lift synchronously. A sliding guide device is provided between the fixed column and the sliding column to reduce the friction between them when the sliding column slides along the fixed column, ensuring the stability of the desk panel's lifting.

[0008] The present invention is further configured such that: the sliding guide device includes a base plate, the base plate is connected to the outer wall of the fixed column, the base plate has a plurality of grooves distributed therein, and the grooves are provided with balls adapted to the grooves so that the balls can roll in the grooves; a cover plate is provided above the base plate, and the cover plate is provided with clearance holes opposite to the grooves; the cover plate covers the base plate so that the clearance holes are opposite to the grooves so that the balls are partially exposed from the clearance holes; the inner wall of the sliding column is provided with a slide rail, and the balls are coupled to the slide rail, thus forming a sliding fit between the two.

[0009] The present invention is further configured such that: the cover plate and the bottom plate are respectively provided with a first threaded hole and a second threaded hole, the fixed column is provided with a third threaded hole that is opposite to the second threaded hole, and the surface of the cover plate is provided with a countersunk hole that communicates with the first threaded hole.

[0010] The present invention is further configured such that: the power output device includes a drive motor and a first right-angle transmission box; the first right-angle transmission box is directly connected to the lifting transmission device in any lifting column; a first transmission rod is provided between the drive motor and the first right-angle transmission box; one end of the output end of the drive motor is directly connected to the lifting transmission device in any lifting column, and the other end is connected to the first transmission rod; a second transmission rod is provided between the first right-angle transmission box and the lifting column; one end of the second transmission rod is directly connected to the lifting transmission device in the lifting column, and the other end is connected to the first right-angle transmission box.

[0011] The present invention is further configured such that: the lifting transmission device includes a second right-angle transmission box, the second right-angle transmission box is fixed to the top inner wall of the sliding column, the second right-angle transmission box is connected to a lead screw extending into the fixed column, the top inner wall of the fixed column is fixed with a driving block, the driving block is fitted around the lead screw and can form a threaded engagement between the two.

[0012] The present invention is further configured such that: a connecting beam is fixed to the top of the sliding column, the connecting beam is provided with an outwardly extending connecting part, an angle steel is fixed to the connecting part, a threaded post is provided on the angle steel, and the first right-angle transmission box is provided with a connecting hole corresponding to the threaded post. The connecting hole and the threaded post form a threaded connection to improve the stability of the installation of the first right-angle transmission box.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] Because a sliding guide device is installed between the fixed column and the sliding column, when the sliding column slides along the fixed column, the sliding guide device can make the friction between the fixed column and the sliding column roll friction. This reduces the friction force generated when the lifting column is raised and lowered. Therefore, it effectively solves the technical problem in the prior art that the lifting column is subjected to large friction force when it is raised and lowered, which affects the stability of the lifting column. In this way, the stability of the tabletop lifting is improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the specific structure of the sliding guide device in this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the sliding guide device in this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the first right-angle transmission box in this utility model;

[0019] Figure 5 This is a schematic diagram of the connection of the lifting column in this utility model;

[0020] Figure 6 This is a schematic diagram showing the connection between the first right-angle transmission box and the connecting beam in this utility model. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] like Figures 1 to 6 As shown, this utility model discloses a single-motor driven three-column height-adjustable desk assembly, including a desk panel 1. Multiple lifting columns 2 arranged in a triangular pattern are fixed to the bottom of the desk panel 1. This triangular arrangement of the lifting columns 2 provides stable support for the desk panel 1. A power output device is located below the desk panel 1. Each lifting column 2 is equipped with an independent lifting transmission device. Through the cooperation of the power output device and the various lifting transmission devices, power is transmitted to each lifting column 2, enabling synchronous lifting and lowering. During the lifting and lowering of the lifting columns 2, a sliding guide device between the fixed column 21 and the sliding column 22 transforms the friction between them into rolling friction, thereby reducing the frictional force generated during lifting and lowering and improving the stability of the desk panel 1.

[0024] like Figure 2 and Figure 3 As shown, in this embodiment, the sliding guide device includes a base plate 31 with multiple grooves distributed on it. A ball bearing 32, adapted to the groove, is provided within each groove, allowing the ball bearing 32 to roll within the groove. After the cover plate 33 is placed on the base plate 31, the clearance hole on the base plate 31 aligns with the groove, allowing part of the ball bearing 32 to protrude from the clearance hole. This ensures that the rolling action can contact the slide rail 34 on the inner wall of the sliding column 22, forming a sliding fit between them. This guides the ball bearing 32, ensuring its stability during rolling and preventing it from slipping out of the groove. Thus, by the ball bearing 32 rolling along the sliding path, the friction between the fixed column 21 and the sliding column 22 becomes rolling friction, thereby reducing the friction generated when the lifting column 2 rises and falls.

[0025] When connecting the cover plate 33 and the base plate 31 to the outer wall of the fixed column 21, the cover plate 33 and the base plate 31 are respectively provided with a first threaded hole 331 and a second threaded hole, and the fixed column 21 is provided with a third threaded hole. By screwing the corresponding locking parts into the first threaded hole 331, the second threaded hole and the third threaded hole, the cover plate 33 and the base plate 31 can be connected to the outer wall of the fixed column. This facilitates the overall assembly. Furthermore, the countersunk hole 332 provided on the surface of the cover plate 33, which communicates with the first threaded hole 331, can prevent the head of the screwed-in locking part from protruding and affecting the contact between the ball 32 and the slide 34.

[0026] Alternatively, corresponding threaded holes can be made only on the cover plate 33 and the base plate 31. This allows the cover plate 33 and the base plate 31 to be connected before the whole assembly is connected to the fixed column 21, preventing the balls from coming off during connection and improving the ease of connection.

[0027] like Figure 1 and 4 As shown, in this embodiment, the power output device includes a drive motor 41 and a first right-angle transmission box 42. A drive gear 421 and a driven gear 422 are rotatably connected within the first right-angle transmission box 42 via bearings. The drive gear 421 and the driven gear 422 are perpendicular to each other and mesh with each other. A first transmission rod 43 is provided between the drive motor 41 and the first right-angle transmission box 42. By connecting one end of the first transmission rod 43 to the drive gear 421 (the first transmission rod passes through the center of the drive gear 421) and extending it into the lifting column 2 to connect with the lifting transmission device, the first right-angle transmission box 42 can be directly connected to the lifting transmission device in any of the lifting columns 2, and the drive motor 41... Power can also be transmitted to the first right-angle transmission box 42 via the first transmission rod 43. One end of the output of the drive motor 41 is directly connected to the lifting transmission device in any of the lifting columns 2. A second transmission rod 44 is provided between the first right-angle transmission box 42 and the lifting column 2. One end of the second transmission rod 44 is connected to the driven gear 422, and the other end is connected to the lifting transmission device in the remaining lifting columns 2. In this way, through the cooperation of the drive motor 41, the first right-angle transmission box 42, the first transmission rod 43 and the second transmission rod 44, the power output by the drive motor 41 can be transmitted to the lifting transmission device in each lifting column 2. Thus, the synchronous lifting of the lifting column 2 can be achieved by a single drive motor 41.

[0028] like Figure 5As shown, the lifting transmission device includes a second right-angle transmission box 51, the structure of which is the same as that of the first right-angle transmission box 42, so it will not be described in detail. The second right-angle transmission box 51 is fixed to the top inner wall of the sliding column 22. The second right-angle transmission box 51 is connected to a lead screw 52 extending into the fixed column 21. A drive block 53 is fixed to the top inner wall of the fixed column 21. The drive block 53 is fitted around the lead screw 52 and can form a threaded engagement between the two. Thus, after the power of the drive motor 41 is transmitted to the second right-angle transmission box 51, the lead screw 52 can be driven to rotate. As the lead screw 52 rotates, the fixed column 21 can move along the direction of the lead screw 52 through the drive block 53. This allows relative sliding between the fixed column 21 and the sliding column 22, thereby realizing the lifting of the lifting column 2.

[0029] like Figure 6 As shown, a connecting beam 6 is fixed to the top of the sliding column 22. The connecting beam 6 has an outwardly extending connecting part, and an angle steel 7 is fixed to the connecting part. The angle steel 7 has a threaded post 8. The first right-angle transmission box 42 has a connecting hole corresponding to the threaded post 8. By screwing the corresponding locking parts into the connecting hole and the threaded post 8, the first right-angle transmission box 42 can be fixed to the angle steel 7, improving the stability of the installation of the first right-angle transmission box 42. This ensures the stable transmission of power output by the drive motor 41, thereby ensuring the stability of the lifting column 2.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A single motor driven three-column lift table assembly, characterized by, The table board is provided with power output devices below, which are used to transmit power to each lifting transmission device to drive each lifting column to synchronously lift, sliding guide devices are arranged between the fixed column and the sliding column, which are used to reduce the friction between the fixed column and the sliding column when the sliding column slides along the fixed column, so as to ensure the stability of the table board lifting.

2. A single motor driven three-column lift table assembly as described in claim 1, wherein, The sliding guide device comprises a bottom plate connected to the outer wall of the fixed column, a plurality of embedding grooves are distributed on the bottom plate, and balls adapted to the embedding grooves are arranged in the embedding grooves, so that the balls can roll in the embedding grooves, a cover plate is arranged above the bottom plate, and a clearance hole opposite to the embedding groove is arranged on the cover plate, the cover plate is arranged on the bottom plate by covering, so that the balls are partially exposed from the clearance hole, and a sliding channel is arranged on the inner wall of the sliding column, the balls are coupled to the sliding channel and can form a sliding fit therebetween.

3. A single motor driven three-column lift table assembly as described in claim 2, wherein, The cover plate and the bottom plate are respectively provided with a first threaded hole and a second threaded hole penetrating through, the fixed column is provided with a third threaded hole opposite to the second threaded hole, and the surface of the cover plate is provided with a counterbore in communication with the first threaded hole.

4. A single motor driven three-column lift table assembly as described in claim 1, wherein, The power output device comprises a driving motor and a first right-angle transmission box, the first right-angle transmission box is directly connected with the lifting transmission device in any lifting column, a first transmission rod is arranged between the driving motor and the first right-angle transmission box, one end of the output end of the driving motor is directly connected with the lifting transmission device in any lifting column, and the other end is connected with the first transmission rod, a second transmission rod is arranged between the first right-angle transmission box and the lifting column, one end of the second transmission rod is directly connected with the lifting transmission device in the lifting column, and the other end is connected with the first right-angle transmission box.

5. A single motor driven three-column lift table assembly as described in claim 1, wherein, The lifting transmission device comprises a second right-angle transmission box, the second right-angle transmission box is fixed to the top inner wall of the sliding column, a lead screw extending into the fixed column is connected to the second right-angle transmission box, a driving block is fixed to the top inner wall of the fixed column, the driving block is sleeved on the outer periphery of the lead screw and can form a threaded fit therebetween.

6. A single motor driven three-column lift table assembly as described in claim 4, wherein, The top of the sliding column is fixed with a connecting beam, the connecting beam is provided with an outwardly extending connecting portion, an angle steel is fixed on the connecting portion, a threaded column is arranged on the angle steel, a connecting hole corresponding to the threaded column is arranged on the first right-angle transmission box, and the connecting hole and the threaded column form a threaded connection therebetween, so as to improve the stability of the first right-angle transmission box installation.

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