Telescopic lifting table transmission shaft

Abstract

The utility model discloses a telescopic lifting table transmission shaft, and relates to the technical field of transmission shafts, the telescopic lifting table transmission shaft comprises a fixed rod, the top end of the fixed rod is provided with a telescopic groove, the inner wall of the telescopic groove is movably connected with a telescopic rod, the outer wall of the telescopic rod is provided with a limiting strip, and one end of the telescopic rod is in threaded connection with an adjusting threaded rod; the bottom end of the fixed rod is rotationally connected with a universal coupling, a movable groove is formed in the telescopic rod, the inner wall of the movable groove is fixedly connected with a nut, and a lead screw is arranged in the telescopic groove. The telescopic rod can stretch out and draw back in the telescopic groove through relative movement between the lead screw and the nut, so that the length of the telescopic table is adjusted, the telescopic purpose is achieved, the telescopic table has the advantages of being adjustable in length and wide in application range, and the accurate requirement of a user for the height of the table top in different application scenes is met.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft technology, and in particular to a retractable and height-adjustable table transmission shaft. Background Technology

[0002] Extendable height-adjustable desks allow users to freely switch between sitting and standing postures, reducing the harm to the body caused by prolonged sitting. As a result, the market demand for extendable height-adjustable desks is constantly increasing, and different users have different needs in terms of the size, shape, and functions of height-adjustable desks.

[0003] However, in existing technologies, the traditional drive shaft structure of height-adjustable desks is often relatively fixed, and cannot be extended or has a limited extension range. For example, some early height-adjustable desks used a fixed-length drive shaft, and the desktop height could only be adjusted by replacing the desk leg parts of different heights. This method is cumbersome to operate and has low adjustment accuracy, which cannot meet the precise needs of users for desktop height in different usage scenarios. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the traditional transmission shaft structure of height-adjustable desks is often relatively fixed, non-extendable or with a limited extension range. For example, some early height-adjustable desks used a transmission shaft of fixed length, and the desktop height could only be adjusted by replacing the desk leg parts of different heights. This method is cumbersome to operate and has low adjustment accuracy, which cannot meet the user's precise needs for desktop height in different usage scenarios. Therefore, a telescopic height-adjustable desk transmission shaft is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a telescopic lifting table drive shaft, comprising a fixed rod, a telescopic groove at the top of the fixed rod, a telescopic rod movably connected to the inner wall of the telescopic groove, a limit strip on the outer wall of the telescopic rod, an adjusting threaded rod threaded to one end of the telescopic rod, a universal coupling rotatably connected to the bottom end of the fixed rod, a movable groove inside the telescopic rod, a nut fixedly connected to the inner wall of the movable groove, a lead screw inside the telescopic groove, the bottom end of the lead screw being drivenly connected to the universal coupling, and the nut being threaded onto the outer wall of the lead screw.

[0006] Preferably, a buffer groove is provided on the inner bottom surface of the telescopic groove.

[0007] Preferably, a gasket is provided inside the buffer groove, and a spring is fixedly connected to the bottom surface of the gasket.

[0008] Preferably, both the washer and the spring are movably sleeved on the outside of the lead screw.

[0009] Preferably, one end of the universal coupling is fixedly connected to a transmission rod, and one end of the transmission rod is fixedly connected to the bottom end of the lead screw.

[0010] Preferably, one end of the adjusting threaded rod is threaded to the inner wall of the telescopic rod, and the other end of the adjusting threaded rod is fixedly connected to an adjusting block.

[0011] Preferably, the outer wall of the adjusting block is fixedly connected to a shaft joint.

[0012] Preferably, the outer wall of the shaft joint is provided with a transmission groove.

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

[0014] 1. In this utility model, the universal coupling driven by an external motor controls the rotation of the lead screw. The relative movement between the lead screw and the nut causes the telescopic rod to extend and retract within the telescopic groove, thereby achieving the length adjustment of this utility model and achieving the purpose of telescopic extension. It has the characteristics of adjustable length and wide range of applications, meeting the user's precise needs for desktop height in different usage scenarios.

[0015] 2. In this utility model, the use of a washer and a spring together allows the bottom of the telescopic rod to be retracted into the buffer groove, thus buffering the descending telescopic rod and reducing the noise generated during the descent and bottoming process. By adjusting the threaded connection between the threaded rod and the top of the telescopic rod, the user can easily adjust the height of the threaded rod by adjusting the adjustment block, thereby increasing the telescopic height range of the telescopic rod. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a retractable and height-adjustable table drive shaft is provided for this utility model;

[0017] Figure 2 This utility model provides a schematic diagram of the internal structure of the drive shaft of a retractable and height-adjustable table;

[0018] Figure 3 This utility model proposes a retractable and height-adjustable table drive shaft. Figure 2 Enlarged view of the structure at point A in the middle;

[0019] Figure 4 This utility model presents a three-dimensional structural diagram of a telescopic groove for a retractable and height-adjustable table drive shaft.

[0020] Legend: 1. Fixed rod; 11. Telescopic groove; 12. Lead screw; 13. Buffer groove; 14. Washer; 15. Spring; 2. Telescopic rod; 21. Limiting strip; 22. Movable groove; 23. Nut; 3. Adjusting threaded rod; 31. Shaft joint; 32. Adjusting block; 33. Transmission groove; 4. Universal coupling; 41. Transmission rod. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide 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 present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a telescopic lifting table drive shaft, including a fixed rod 1, a telescopic groove 11 at the top of the fixed rod 1, a telescopic rod 2 movably connected to the inner wall of the telescopic groove 11, a limit strip 21 on the outer wall of the telescopic rod 2, an adjusting threaded rod 3 threadedly connected to one end of the telescopic rod 2, a universal coupling 4 rotatably connected to the bottom end of the fixed rod 1, a movable groove 22 inside the telescopic rod 2, a nut 23 fixedly connected to the inner wall of the movable groove 22, a lead screw 12 inside the telescopic groove 11, the bottom end of the lead screw 12 being drivenly connected to the universal coupling 4, and the nut 23 being threadedly sleeved on the outer wall of the lead screw 12.

[0024] The specific settings and functions of this embodiment are described below. The universal coupling 4 is driven by an external motor to control the rotation of the lead screw 12. The relative movement between the lead screw 12 and the nut 23 causes the telescopic rod 2 to extend and retract within the telescopic groove 11, thereby realizing the length adjustment of this utility model and achieving the purpose of telescopicity. It has the characteristics of adjustable length and wide range of applications.

[0025] Example 2: Figure 1 - Figure 4 As shown, a buffer groove 13 is provided on the inner bottom surface of the telescopic groove 11. A gasket 14 is provided inside the buffer groove 13. A spring 15 is fixedly connected to the bottom surface of the gasket 14. Both the gasket 14 and the spring 15 are movably sleeved on the outside of the lead screw 12. A transmission rod 41 is fixedly connected to one end of the universal coupling 4. One end of the transmission rod 41 is fixedly connected to the bottom end of the lead screw 12. One end of the adjusting threaded rod 3 is threadedly connected to the inner wall of the telescopic rod 2. An adjusting block 32 is fixedly connected to the other end of the adjusting threaded rod 3. A shaft joint 31 is fixedly connected to the outer wall of the adjusting block 32. A transmission groove 33 is provided on the outer wall of the shaft joint 31.

[0026] The overall effect of this embodiment is that, through the combined use of the gasket 14 and the spring 15, the bottom end of the telescopic rod 2 is buffered after retracting into the buffer groove 13, reducing the noise generated during the descent and bottoming process. By adjusting the threaded connection between the threaded rod 3 and the top of the telescopic rod 2, the user can easily adjust the height of the threaded rod 3 through the adjusting block 32, thereby increasing the telescopic height range of the telescopic rod 2. The universal coupling 4 is connected to an external motor, so that the external motor drives the universal coupling 4 to control the transmission rod 41 to drive the lead screw 12 to rotate.

[0027] The usage and working principle of this device are as follows: It is connected to an external motor via a universal coupling 4. The external motor drives the universal coupling 4 to control the rotation of the lead screw 12. The relative movement between the lead screw 12 and the nut 23 causes the telescopic rod 2 to extend and retract within the telescopic groove 11, thus achieving the length adjustment of this invention and achieving the purpose of telescopicity. The use of the washer 14 and spring 15, in conjunction with the retraction of the bottom end of the telescopic rod 2 into the buffer groove 13, buffers the descending telescopic rod 2, reducing noise generated during the descent and bottoming process. By adjusting the threaded connection between the threaded rod 3 and the top of the telescopic rod 2, the user can easily adjust the height of the threaded rod 3 using the adjusting block 32, thereby increasing the telescopic height range of the telescopic rod 2.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A telescopic lifting table transmission shaft comprising a fixed rod (1), characterized in that: The top end of the fixed rod (1) is provided with a telescopic slot (11), the inner wall of the telescopic slot (11) is movably connected with a telescopic rod (2), the outer wall of the telescopic rod (2) is provided with a limiting strip (21), one end of the telescopic rod (2) is threadedly connected with an adjusting threaded rod (3), the bottom end of the fixed rod (1) is rotatably connected with a universal coupling (4), the inside of the telescopic rod (2) is provided with a movable slot (22), the inner wall of the movable slot (22) is fixedly connected with a nut (23), the inside of the telescopic slot (11) is provided with a lead screw (12), the bottom end of the lead screw (12) is drivingly connected with the universal coupling (4), the nut (23) is threadedly sleeved on the outer wall of the lead screw (12).

2. A telescoping lift table drive shaft according to claim 1, wherein: The inner bottom surface of the telescopic slot (11) is provided with a buffer slot (13).

3. A telescoping lift table drive shaft as defined in claim 2, wherein: The inside of the buffer slot (13) is provided with a gasket (14), the bottom surface of the gasket (14) is fixedly connected with a spring (15).

4. A telescoping lift table drive shaft as defined in claim 3, wherein: The gasket (14) and the spring (15) are movably sleeved on the outside of the lead screw (12).

5. A telescoping lift table drive shaft as defined in claim 1, wherein: One end of the universal coupling (4) is fixedly connected with a transmission rod (41), one end of the transmission rod (41) is fixedly connected with the bottom end of the lead screw (12).

6. A telescoping lift table drive shaft according to claim 1, wherein: One end of the adjusting threaded rod (3) is threadedly connected with the inner wall of the telescopic rod (2), the other end of the adjusting threaded rod (3) is fixedly connected with an adjusting block (32).

7. A telescoping lift table drive shaft according to claim 6, wherein: The outer wall of the adjusting block (32) is fixedly connected with a shaft joint (31).

8. A telescoping lift table drive shaft according to claim 7, wherein: The outer wall of the shaft joint (31) is provided with a transmission slot (33).

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