Electric lifting table

Abstract

The utility model relates to the technical field of lifting tables, and discloses an electric lifting table which comprises a table plate, sliding square pipes are fixedly connected to the four corners of the small surface of the table plate, fixed square pipes are slidably connected into the sliding square pipes, and bottom plates are fixedly connected to the bottom ends of every two adjacent fixed square pipes on the same side. A transverse plate is fixedly connected between every two adjacent sliding square pipes on the same side, a fixing seat is fixedly connected to the middle of the upper surface of the bottom plate, an inner threaded sleeve is fixedly connected to the upper surface of the fixing seat, and a threaded rod is in threaded connection with the interior of the inner threaded sleeve. According to the lifting device, the fixed square pipe and the sliding square pipe can be fixed after lifting is completed through matched use of the screws and the threaded holes, the adjusted state can still be stably kept after the driving motor is powered off, the driving motor does not need to continuously conduct self-locking work, losses of the driving motor are reduced, and the driving motor is effectively protected.

Description

Technical Field

[0001] This utility model relates to the field of height-adjustable desks, and more specifically to an electric height-adjustable desk. Background Technology

[0002] With the popularization of healthy office concepts and the deepening of ergonomic design, electric height-adjustable desks, due to their adjustable height and adaptability to diverse scenarios, have gradually become core equipment in the fields of office, home and education.

[0003] A search revealed a Chinese patent with publication number CN218791095U, which discloses a height-adjustable desk. The desk is equipped with a lifting mechanism and a control module inside its body. The control module can control the lifting mechanism to move the movable legs longitudinally relative to the fixed legs, thus achieving height adjustment. However, after the height adjustment is completed, the motor needs to be kept powered on to ensure that the height of the desk does not change. This increases the load on the motor and reduces its lifespan. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an electric height-adjustable table to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: an electric height-adjustable table, including a tabletop, with sliding square tubes fixedly connected to the four corners of the small surface of the tabletop, and fixed square tubes slidably connected inside the multiple sliding square tubes. A base plate is fixedly connected to the bottom ends of two adjacent fixed square tubes on the same side, and a horizontal plate is fixedly connected between the two adjacent sliding square tubes on the same side. A fixed seat is fixedly connected to the middle position of the upper surface of the base plate, and an internally threaded sleeve is fixedly connected to the upper surface of the fixed seat. A threaded rod is internally threaded to the internally threaded sleeve, and an end block is fixedly connected to the top end of the threaded rod. The upper surface of the end block is rotatably connected to the lower surface of the horizontal plate through a bearing. A drive motor capable of rotating the end block axially is fixedly connected to the upper surface of the horizontal plate. Multiple threaded holes with equal spacing are opened on the multiple fixed square tubes, and a clearance hole for cooperating with the threaded hole is opened on one side of the multiple sliding square tubes. A screw for cooperating with the threaded hole is provided in the clearance hole.

[0006] As a further embodiment of this utility model, a downwardly extending circular tube cover is rotatably connected to the outer circumferential wall of the end block, an annular groove is formed on the inner circumferential wall of the circular tube cover, and a fixing ring that cooperates with the annular groove is fixedly connected to the outer circumferential wall of the end block. The downward extension length of the circular tube cover is the same as the length of the threaded rod, and a nylon ring is provided between the internal threaded sleeve and the threaded rod.

[0007] As a further embodiment of this utility model, the tabletop has clearance grooves at both ends of its lower surface, and both sides of the tabletop are rotatably connected to extension plates of the same size as the clearance grooves.

[0008] As a further embodiment of this utility model, the lower surfaces of the two extension plates are provided with two symmetrical notches, and the top inner walls of the two clearance slots are provided with two notches that cooperate with the notches. The adjacent notches and notches form a cylindrical groove, and the top inner walls of the multiple notches are rotatably connected with locking rods.

[0009] As a further embodiment of this utility model, the lower surface of the extension plate is provided with two symmetrical grooves, and each of the two grooves is provided with a magnetic block. The top inner wall of the clearance groove is provided with an iron block that cooperates with the magnetic block.

[0010] As a further embodiment of this utility model, inclined reinforcing ribs are fixedly connected to both ends of the upper surface of the horizontal plate and to the outer walls of the two adjacent sliding square tubes.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model uses screws and threaded holes to fix the fixed square tube and the sliding square tube after lifting is completed. It can still maintain the adjusted state stably after the drive motor is powered off, without the need for the drive motor to continuously perform self-locking work, thus reducing the wear and tear on the drive motor and effectively protecting it.

[0013] 2. With the extension plate provided, the table occupies little space when not unfolded, and when it needs to be unfolded, the usable area can be temporarily expanded by extending the tabletop, thus maximizing functionality within a limited space and balancing practicality and flexibility.

[0014] 3. This utility model uses a combination of a lever and a magnetic block to keep the extension plate in use when it needs to be unfolded, and to stably hold it in the clearance groove when not in use, thus saving space.

[0015] 4. This utility model provides protection for the threaded rod by setting a round tube cover on the outside of the threaded rod that moves up and down with it. This prevents the threaded rod from being exposed to the air during the lifting and lowering process. In addition, the nylon ring increases the friction coefficient between the threaded contact surfaces, effectively suppressing loosening and displacement caused by thread springback. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front three-dimensional structure of this utility model.

[0017] Figure 2This is a schematic diagram of the rear three-dimensional structure of this utility model.

[0018] Figure 3 This is an enlarged schematic diagram of the lifting structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the bottom structure of the tabletop of this utility model.

[0020] Figure 5 This utility model Figure 2 A magnified structural diagram of part A.

[0021] The attached diagram is labeled as follows: 1. Base plate; 2. Fixed square tube; 3. Sliding square tube; 4. Tabletop; 5. Horizontal plate; 6. Fixed seat; 7. Internal threaded sleeve; 8. Threaded rod; 9. End block; 10. Drive motor; 11. Round tube cover; 12. Fixed ring; 13. Annular groove; 14. Alternating groove; 15. Extension plate; 16. Notch one; 17. Notch two; 18. Locking rod; 19. Magnetic block; 20. Alternating hole; 21. Threaded hole; 22. Screw; 23. Nylon ring. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Reference Figures 1-5This utility model provides an electric height-adjustable table, including a tabletop 4. Sliding square tubes 3 are bolted to the four corners of the small surface of the tabletop 4. Fixed square tubes 2 are slidably connected inside each of the sliding square tubes 3. A base plate 1 is bolted to the bottom ends of two adjacent fixed square tubes 2 on the same side. A horizontal plate 5 is bolted between two adjacent sliding square tubes 3 on the same side. A fixed seat 6 is bolted to the middle of the upper surface of the base plate 1. An internally threaded sleeve 7 is bolted to the upper surface of the fixed seat 6. A threaded rod 8 is internally threaded onto the internally threaded sleeve 7. The top of the threaded rod 8... An end block 9 is bolted to the upper surface of a horizontal plate 5, and the upper surface of the end block 9 is rotatably connected to the lower surface of the horizontal plate 5 via a bearing. A drive motor 10, capable of rotating the end block 9 axially, is bolted to the upper surface of the horizontal plate 5. Multiple fixed square tubes 2 are provided with multiple equally spaced threaded holes 21. Multiple sliding square tubes 3 are provided with clearance holes 20 on one side that mate with the threaded holes 21. Screws 22 that mate with the threaded holes 21 are provided within the clearance holes 20. Inclined fasteners are bolted to the outer walls of two adjacent sliding square tubes 3 at both ends of the upper surface of the horizontal plate 5. To adjust the table height, first remove the multiple screws 22 on the sliding square tube 3. After removal, simultaneously start the two drive motors 10 to rotate the end block 9. As the end block 9 rotates, it also rotates the threaded rod 8 at its bottom. Because the threaded rod 8 is threadedly connected to the internal threaded sleeve 7, it moves up or down as it rotates, thus moving the tabletop 4 up or down via the horizontal plate 5 and the sliding square tube 3, thereby adjusting the table height. After adjustment, align the clearance hole 20 with the threaded hole 21, and then... The screw 22 is re-passed through the clearance hole 20 and installed into the threaded hole 21. With the cooperation of the screw 22 and the threaded hole 21, the fixed square tube and the sliding square tube can be fixed after the lifting is completed. After the drive motor 10 is powered off, it can still maintain the adjusted state stably. The drive motor 10 does not need to continuously perform self-locking work, which reduces the wear of the drive motor 10 and effectively protects the drive motor 10. A nylon ring 23 is provided between the internal threaded sleeve 7 and the threaded rod 8. The nylon ring can generate elastic compression, increase the friction coefficient between the thread contact surfaces, and effectively suppress the loosening displacement caused by thread springback.

[0024] In this invention, a downwardly extending cylindrical cover 11 is rotatably connected to the outer circumference of the end block 9. An annular groove 13 is provided on the inner circumference of the cylindrical cover 11. A fixing ring 12 that cooperates with the annular groove 13 is fixedly connected to the outer circumference of the end block 9 by bolts. The downward extension length of the cylindrical cover 11 is the same as the length of the threaded rod 8. When the height of the table is adjusted, the end block 9 will drive the outer rotating cylindrical cover 11 to move up and down synchronously, covering the threaded rod 8 and preventing it from being exposed to the air. Through the provided drive motor 10 and the threaded rod 8 that is threadedly connected to the inner threaded sleeve 7, the rotation of the drive motor 10 can be directly started to control the lifting and lowering of the table. In addition, the cylindrical cover 11 that moves up and down with the threaded rod 8 is provided on the outside of the threaded rod 8, which can prevent the threaded rod 8 from being exposed to the air during the lifting and lowering process, effectively protecting it.

[0025] In this invention, both ends of the lower surface of the tabletop 4 are provided with recessed grooves 14, and both sides of the tabletop 4 are rotatably connected with extension plates 15 of the same size as the recessed grooves 14. With the extension plates 15, the table occupies little space when not unfolded, and when unfolded, the usable area can be temporarily expanded by extending the tabletop, maximizing functionality within a limited space and balancing practicality and flexibility. The lower surfaces of the two extension plates 15 are each provided with two symmetrical notches 16, and the top inner walls of the two recessed grooves 14 are each provided with two notches 16 that cooperate with the notches 16. The second notch 17 and the adjacent first notch 16 form a cylindrical groove with the second notch 17. The top inner wall of each of the multiple first notches 16 is rotatably connected with a locking rod 18. The lower surface of the extension plate 15 is provided with two symmetrical grooves, and each groove is provided with a magnetic block 19. The top inner wall of the clearance groove 14 is provided with an iron block that works with the magnetic block 19. By using the locking rod 18 and the magnetic block 19 together, the extension plate 15 can be kept in use when it needs to be unfolded. When not in use, it can be stably attracted in the clearance groove 14 by the magnetic block 19, thus saving space.

[0026] The use of this utility model involves the following steps:

[0027] S1: When the height of the table needs to be adjusted, first remove the multiple screws 22 on the sliding square tube 3. After removal, start the two drive motors 10 at the same time to drive the end block 9 to rotate. While the end block 9 is rotating, it drives the threaded rod 8 at the bottom to rotate. Since the threaded rod 8 is connected to the internal threaded sleeve 7 by threads, it will move up or down while rotating. This will cause the table board 4 to move up or down through the horizontal plate 5 and the sliding square tube 3, thereby adjusting the height of the table.

[0028] S2: After the adjustment is completed, align the relief hole 20 with the threaded hole 21, and then re-install the screw 22 through the relief hole 20 into the threaded hole 21;

[0029] S3: While the height of the table is being adjusted, the end block 9 will drive the outer rotating round tube cover 11 to move up and down synchronously, covering the threaded rod 8 and preventing it from being exposed to the air.

[0030] S4: When it is necessary to extend the width of the desktop, rotate the extension plate 15 at the bottom of the tabletop 4 to make it flush with the upper surface of the tabletop 4, and then rotate the locking rod 18 to make it contact both the tabletop 4 and the extension plate 15 at the same time to fix the extension plate 15.

[0031] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0032] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0033] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. An electric height-adjustable table, comprising a tabletop (4), wherein sliding square tubes (3) are fixedly connected to the four corners of the small surface of the tabletop (4), and fixed square tubes (2) are slidably connected inside the plurality of sliding square tubes (3), characterized in that: Two fixed square tubes (2) on the same side are fixedly connected to a base plate (1) at their bottom ends. Two sliding square tubes (3) on the same side are fixedly connected to a horizontal plate (5). A fixed seat (6) is fixedly connected to the middle position of the upper surface of the base plate (1). An internally threaded sleeve (7) is fixedly connected to the upper surface of the fixed seat (6). A threaded rod (8) is internally threaded onto the internally threaded sleeve (7). An end block (9) is fixedly connected to the top of the threaded rod (8). The upper surface of the end block (9) is... The lower surface of the horizontal plate (5) is rotatably connected to the bearing. The upper surface of the horizontal plate (5) is fixedly connected to a drive motor (10) that can rotate the end block (9) along the axial direction. Multiple fixed square tubes (2) are provided with multiple threaded holes (21) at equal intervals. One side of multiple sliding square tubes (3) is provided with a clearance hole (20) that cooperates with the threaded hole (21). Each clearance hole (20) is provided with a screw (22) that cooperates with the threaded hole (21).

2. The electric height-adjustable desk according to claim 1, characterized in that: A downwardly extending circular tube cover (11) is rotatably connected to the outer circumference of the end block (9). An annular groove (13) is provided on the inner circumference of the circular tube cover (11). A fixing ring (12) that cooperates with the annular groove (13) is fixedly connected to the outer circumference of the end block (9). The downward extension length of the circular tube cover (11) is the same as the length of the threaded rod (8). A nylon ring (23) is provided between the internal threaded sleeve (7) and the threaded rod (8).

3. The electric height-adjustable desk according to claim 1, characterized in that: The tabletop (4) has clearance grooves (14) at both ends of its lower surface, and both sides of the tabletop (4) are rotatably connected to extension plates (15) of the same size as the clearance grooves (14).

4. The electric height-adjustable desk according to claim 3, characterized in that: The lower surfaces of the two extension plates (15) are provided with two symmetrical notches (16), and the top inner walls of the two clearance grooves (14) are provided with two notches (17) that cooperate with the notches (16). The adjacent notches (16) and notches (17) form a cylindrical groove. The top inner walls of the multiple notches (16) are rotatably connected with locking rods (18).

5. An electric height-adjustable desk according to claim 3, characterized in that: The lower surface of the extension plate (15) is provided with two symmetrical grooves, and each of the two grooves is provided with a magnetic block (19). The top inner wall of the clearance groove (14) is provided with an iron block that works in conjunction with the magnetic block (19).

6. The electric height-adjustable desk according to claim 1, characterized in that: Inclined reinforcing ribs are fixedly connected to both ends of the upper surface of the horizontal plate (5) and to the outer walls of the two adjacent sliding square tubes (3).

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