Damping transmission shaft for lifting table

Abstract

The utility model discloses a shock-absorbing transmission shaft for a lifting table, which relates to the technical field of transmission shafts and comprises a coupler body, a transmission shaft is inserted into one end of the coupler body and comprises a connecting shaft, an input shaft, an output shaft, a fixing block and a rubber pad I. Two ends of the connecting shaft are fixedly connected with a rubber pad II respectively. The fixing block is movably connected to one end of the connecting shaft, the input shaft is fixedly connected to the center of the outer wall of the fixing block, a telescopic groove is formed in the connecting shaft, a limiting sliding groove is formed in the outer wall of one end of the connecting shaft in a penetrating mode, and a movable rod is movably connected to the inner wall of the limiting sliding groove. When the lifting table vibrates in the lifting process or due to external factors, the first rubber pad and the second rubber pad in the transmission shaft can deform, mechanical energy of vibration is converted into elastic potential energy, vibration transmission is reduced, and transmission of the lifting table is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission shaft technical field especially relates to a shock absorption transmission shaft for lift table. BACKGROUND

[0002] With the improvement of people's health consciousness, the lift table is more and more common in the office and home field. The lift table allows users to switch between sitting and standing positions, which helps to alleviate the health problems caused by long sitting. The lift table is usually powered by a motor, and the transmission shaft transmits the rotary power generated by the motor to the lift mechanism such as the lead screw, gear and other key components. Through the rotation of the transmission shaft, the lead screw nut pair or gear rack mechanism is driven to realize the lifting action of the desktop.

[0003] However, in the prior art, the traditional transmission shaft damping structure may have some effect in dealing with low-frequency vibration, but for high-frequency vibration or complex vibration conditions, such as vibration caused by irregular resistance encountered during motor starting, stopping and lifting process, the damping effect is not good, and the vibration will still be transmitted to the desktop, causing the desktop to shake and affecting the user experience. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems that the traditional transmission shaft damping structure may have some effect in dealing with low-frequency vibration, but for high-frequency vibration or complex vibration conditions, such as vibration caused by irregular resistance encountered during motor starting, stopping and lifting process, the damping effect is not good, and the vibration will still be transmitted to the desktop, causing the desktop to shake and affecting the user experience, and proposes a shock absorption transmission shaft for lift table.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a shock absorption transmission shaft for lift table, comprising a shaft coupling body, one end of the shaft coupling body is inserted with a transmission shaft, the transmission shaft comprises a connecting shaft, an input shaft, an output shaft, a fixed block and a rubber pad one, the both ends of the connecting shaft are fixedly connected with rubber pads two, the fixed block is movably connected at one end of the connecting shaft, the input shaft is fixedly connected at the center of the outer wall of the fixed block, the inside of the connecting shaft is provided with an expansion slot, the outer wall of one end of the connecting shaft is provided with a limiting sliding groove, the inner wall of the limiting sliding groove is movably connected with a movable rod, one end of the movable rod is fixedly connected with the fixed block, the other end of the movable rod is fixedly connected with a limiting plate, one end of the limiting plate is fixedly connected with a spring one, the other end of the limiting plate is fixedly connected with a spring two, the spring one is sleeved on the outer wall of the movable rod.

[0006] Preferably, the outer wall of the rubber pad two at one end of the connecting shaft is fixedly connected with the output shaft.

[0007] Preferably, the rubber pad one is fixedly connected at the other end of the output shaft.

[0008] Preferably, one end of the rubber pad is fixedly connected with a connecting block.

[0009] Preferably, the coupling body comprises a half-coupling one, a half-coupling two and a rubber block, and one end of the half-coupling two is fixedly connected with one end of the half-coupling one.

[0010] Preferably, a plurality of rubber blocks are arranged, and the rubber blocks are fixedly connected between the half-coupling one and the half-coupling two.

[0011] Preferably, a connecting hole is arranged in the center of the outer wall of the half-coupling one and the half-coupling two.

[0012] Preferably, the inner wall of the connecting hole of the half-coupling one is inserted with one end of the input shaft.

[0013] Compared with the prior art, the advantages and positive effects of the utility model lie in that:

[0014] 1、in the utility model, when the lifting table is in lifting process or produces vibration due to external factors, the rubber pad one and the rubber pad two in the transmission shaft will be deformed, the mechanical energy of vibration is converted into elastic potential energy, thereby reducing the transmission of vibration, and the transmission of the lifting table is more stable.

[0015] 2、in the utility model, through the cooperation of the spring one and the spring two, the fixed block and the connecting shaft are stretched and contracted when subjected to vibration, and the elastic deformation of the spring is utilized to further absorb vibration energy, so that multiple elastic elements can work cooperatively under vibration of different frequencies and intensities, and vibration is more effectively buffered. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 a three-dimensional structure schematic diagram of the damping transmission shaft for the lifting table is provided for the utility model;

[0017] Figure 2 a structure schematic diagram of the coupling body of the damping transmission shaft for the lifting table is provided for the utility model;

[0018] Figure 3 a sectional structure schematic diagram of the connecting shaft of the damping transmission shaft for the lifting table is provided for the utility model;

[0019] Figure 4 an internal structure schematic diagram of the connecting shaft of the damping transmission shaft for the lifting table is provided for the utility model.

[0020] Legend: 1. Coupling body; 11. Half coupling one; 12. Half coupling two; 13. Rubber block; 14. Connecting hole; 2. Drive shaft; 21. Connecting shaft; 211. Limiting groove; 212. Telescopic groove; 213. Spring one; 214. Spring two; 22. Input shaft; 23. Output shaft; 24. Fixed block; 241. Movable rod; 242. Limiting plate; 25. Rubber pad one; 26. Rubber pad two; 3. Connecting block. 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 shock-absorbing transmission shaft for a height-adjustable desk, including a coupling body 1. One end of the coupling body 1 is connected to a transmission shaft 2. The transmission shaft 2 includes a connecting shaft 21, an input shaft 22, an output shaft 23, a fixing block 24, and a rubber pad 25. Both ends of the connecting shaft 21 are fixedly connected to rubber pads 26. The fixing block 24 is movably connected to one end of the connecting shaft 21. The input shaft 22 is fixedly connected to the center of the outer wall of the fixing block 24. The connecting shaft 21 has a telescopic groove 212 inside. A limiting groove 211 is formed through the outer wall of one end of the connecting shaft 21. A movable rod 241 is movably connected to the inner wall of the limiting groove 211. One end of the movable rod 241 is fixedly connected to the fixing block 24. The other end of the movable rod 241 is fixedly connected to a limiting plate 242. One end of the limiting plate 242 is fixedly connected to a spring 213. The other end of the limiting plate 242 is fixedly connected to a spring 214. The spring 213 is sleeved on the outer wall of the movable rod 241.

[0024] The specific settings and functions of this embodiment will be described in detail below. The rubber pads 25 and 26 in the transmission shaft 2 will deform, converting the mechanical energy of the vibration into elastic potential energy, thereby reducing the transmission of vibration and making the transmission of the lifting table more stable. Through the cooperation of spring 213 and spring 214, the fixed block 24 and the connecting shaft 21 will expand and contract when subjected to vibration. The elastic deformation of the springs will further absorb the vibration energy. In this way, under vibration of different frequencies and intensities, multiple elastic elements can work together to more effectively buffer the vibration.

[0025] Embodiment two: as Figure 1 Figure 4 As shown in the figure, the output shaft 23 is fixedly connected with the outer wall of the rubber pad two 26 at one end of the connecting shaft 21, the rubber pad one 25 is fixedly connected at the other end of the output shaft 23, one end of the rubber pad one 25 is fixedly connected with the connecting block 3, the shaft coupling body 1 comprises a half coupling one 11, a half coupling two 12 and a rubber block 13, one end of the half coupling two 12 is fixedly connected with one end of the half coupling one 11, the rubber block 13 is provided with a plurality of rubber blocks 13, the rubber block 13 is fixedly connected between the half coupling one 11 and the half coupling two 12, the outer wall center of the half coupling one 11 and the half coupling two 12 is provided with a connecting hole 14, and the connecting hole 14 in the inner wall of the half coupling one 11 is inserted with one end of the input shaft 22.

[0026] The effect of the whole embodiment is that the shaft coupling body 1 is connected with the motor output end of the lifting table, the motor power is transmitted and output by the shaft coupling body 1 and the transmission shaft 2, and the impact caused by the change of torque is relieved by the rubber block 13 in the process of transmitting torque.

[0027] The working principle of the device is that the shaft coupling body 1 is connected with the motor output end of the lifting table, the motor power is transmitted to the input end of the lifting table by the shaft coupling body 1 and the transmission shaft 2, when the lifting table is lifted or vibrates due to external factors, the rubber pad one 25 and the rubber pad two 26 in the transmission shaft 2 will deform, the mechanical energy of vibration is converted into elastic potential energy, so that the transmission of the lifting table is more stable, the fixed block 24 and the connecting shaft 21 are stretched and contracted when they are vibrated by the cooperation of the spring one 213 and the spring two 214, and the elastic deformation of the spring further absorbs the vibration energy.

[0028] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments without departing from the technical scheme of the present application, according to the technical essence of the present application, still belongs to the protection scope of the present application.​

Claims

1. A shock-absorbing transmission shaft for a sit-stand desk, characterized by: The utility model provides a coupling body (1), one end of the coupling body (1) is inserted with a transmission shaft (2), the transmission shaft (2) includes connecting shaft (21), input shaft (22), output shaft (23), fixed block (24) and rubber pad one (25), both ends of connecting shaft (21) are fixedly connected with rubber pad two (26), the fixed block (24) is movably connected in one end of connecting shaft (21), the input shaft (22) is fixedly connected in the outer wall center of fixed block (24), the inside of connecting shaft (21) is provided with telescopic groove (212), the outer wall one end of connecting shaft (21) is provided with the limit sliding slot (211) of going through, the inner wall of limit sliding slot (211) is movably connected with movable rod (241), one end of movable rod (241) is fixedly connected with fixed block (24), the other end of movable rod (241) is fixedly connected with limit board (242), one end of limit board (242) is fixedly connected with spring one (213), the other end of limit board (242) is fixedly connected with spring two (214), spring one (213) is sleeved in the outer wall of movable rod (241).

2. The damping transmission shaft for a sit-stand desk according to claim 1, characterized in that: The output shaft (23) is fixedly connected with the outer wall of the rubber pad two (26) at one end of the connecting shaft (21).

3. The damping transmission shaft for a sit-stand desk according to claim 2, characterized in that: The rubber pad one (25) is fixedly connected to the other end of the output shaft (23).

4. The damping transmission shaft for a sit-stand desk according to claim 3, characterized in that: One end of the rubber pad one (25) is fixedly connected with the connecting block (3).

5. The damping transmission shaft for lift table according to claim 1, characterized in that: The coupling body (1) includes a half-coupler one (11), a half-coupler two (12), and a rubber block (13), one end of the half-coupler two (12) is fixedly connected with one end of the half-coupler one (11).

6. A damping transmission shaft for a sit-stand desk according to claim 5, characterized in that: The rubber block (13) is provided with a plurality of rubber blocks (13) fixedly connected between the half-coupler one (11) and the half-coupler two (12).

7. A damping transmission shaft for a sit-stand desk according to claim 6, characterized in that: The outer wall center of the half-coupler one (11) and the half-coupler two (12) is provided with a connecting hole (14).

8. A damping transmission shaft for a sit-stand desk according to claim 7, characterized in that: The inner wall of the connecting hole (14) of the half-coupler one (11) is inserted with one end of the input shaft (22).

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