Low-noise electric push rod for lifting table

Abstract

The low-noise electric push rod for the lifting table comprises an outer pipe sleeve and a transmission cavity, a sound insulation box is arranged on one side of the outer pipe sleeve, the transmission cavity is formed in the outer pipe sleeve, a first rotating rod is arranged at the lower end of the interior of the outer pipe sleeve, a threaded rod is fixed to the upper end of the first rotating rod, and a second rotating rod is arranged at the lower end of the threaded rod. The outer portion of the threaded rod is in threaded connection with an inner pipe sleeve, one end of the inner pipe sleeve extends to the outer portion of the outer pipe sleeve, the inner pipe sleeve is in sliding fit with the outer pipe sleeve, and four fixing blocks which are annularly distributed at equal intervals are arranged on the lower side of the outer wall of the inner pipe sleeve. According to the low-noise electric push rod for the lifting table, large mechanical vibration and sharp noise generated when the lifting table rapidly ascends or descends are avoided, the lifting process of the lifting table can be more stable and quiet, noise transmission during use of the electric push rod is reduced, effective control over noise is achieved, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric push rods, in particular to a low-noise electric push rod for a lifting table. Background Art

[0002] As an advanced electric drive device, the electric linear actuator converts the motor's rotary motion into linear reciprocating motion. It can precisely control the linear movement of objects, achieving precise positioning and adjustment. Whether it's a device requiring fine-tuning or a large range of linear motion, the electric linear actuator can flexibly adjust according to demand, ensuring the smooth completion of the task. The electric linear actuator automates and precisely adjusts the height of the lift table. Users only need to gently operate the control panel or remote control, and the electric linear actuator will respond quickly, smoothly adjusting the desktop to the desired height. This instant height adjustment capability allows the lift table to adapt to the height, sitting, or standing posture of different users, greatly improving work comfort and efficiency.

[0003] The existing Chinese patent with announcement number CN216494063U discloses an electric push rod for a lifting table, including a drive assembly, a screw connected to the drive assembly, a nut and a sleeve assembly sleeved on the outside of the screw. The drive assembly drives the screw to rotate, thereby controlling the nut to drive the sleeve assembly to slide on the screw. Micro switches are provided at both ends of the sleeve assembly, and the nut is correspondingly provided with a trigger part. The nut drives the trigger part to move to the micro switch and trigger the micro switch.

[0004] Although the above scheme ensures the precise movement of the electric push rod and eliminates the deviation of the electric push rod movement, the electric push rod uses a motor as its power source. When the motor is running, it will inevitably generate a certain amount of noise due to factors such as electromagnetic induction and mechanical rotation. At the same time, if the electric push rod moves quickly, it will produce a large impact and easily generate sharp noise. Therefore, it does not meet the existing needs. In this regard, we propose a low-noise electric push rod for a lifting table. Utility Model Content

[0005] The purpose of the present utility model is to provide a low-noise electric push rod for a lifting table, so as to solve the problem proposed in the above background technology that the motor of the electric push rod is prone to generate noise when in use and that the lifting table will generate a large impact and thus easily generate sharp noise when it is raised quickly.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a low-noise electric push rod for a lifting table, comprising an outer tube sleeve, a sound insulation box being provided on one side of the outer tube sleeve;

[0007] The outer sleeve further comprises a transmission cavity, which is provided inside the outer sleeve. A first rotating rod is provided at the lower end of the inner sleeve. A threaded rod is fixed to the upper end of the first rotating rod. The outer thread of the threaded rod is connected to the inner sleeve through threads. One end of the inner sleeve extends to the outside of the outer sleeve, and the inner sleeve and the outer sleeve are slidably engaged. Four fixing blocks are provided on the lower side of the outer wall of the inner sleeve at equal intervals in an annular shape.

[0008] It also includes a honeycomb sound insulation board, which is arranged on the inner side of the sound insulation box. The outer side of the honeycomb sound insulation board is provided with a sound absorption cavity, and the interior of the sound absorption cavity is adhered and fixed with a sound absorption airbag.

[0009] Preferably, a transmission worm wheel is provided on the outer wall of the first rotating rod, a transmission worm is provided behind the transmission worm wheel, one end of the transmission worm is rotatably connected to the transmission cavity, and worm transmission is performed between the transmission worm and the transmission worm wheel.

[0010] Preferably, a motor is provided inside the sound insulation box, and a second rotating rod is provided at the output end of the motor through a coupling, one end of the second rotating rod passes through and extends into the interior of the transmission cavity, and the second rotating rod rotates with the transmission cavity, and one end of the second rotating rod located inside the transmission cavity is connected to the transmission worm.

[0011] Preferably, four guide rods equidistantly distributed in a circular shape are welded inside the transmission cavity, and the guide rods all pass through the fixed block and are in sliding engagement with the fixed block.

[0012] Preferably, a buffer spring is sleeved on the upper side of the outer portion of the guide rod, one end of the buffer spring is connected to the transmission cavity, and the other end of the buffer spring is connected to the fixed block.

[0013] Preferably, ball grooves are provided on the outer side of the fixed block and the inner wall of the transmission cavity, and four ball grooves are provided on the inner wall of the transmission cavity at equal intervals in a circular shape, balls are provided inside the ball grooves, and the balls are all in rolling engagement with the ball grooves.

[0014] Preferably, a plurality of folded through holes distributed in a rectangular array are provided between the honeycomb sound insulation board and the sound absorbing cavity.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model provides a honeycomb sound insulation board inside the sound insulation box. When the motor starts and generates noise, part of the noise will be blocked by the honeycomb sound insulation board. The honeycomb structure design of the honeycomb sound insulation board can effectively disperse and absorb sound wave energy, reduce the reflection and resonance of sound waves, thereby creating a quieter working environment in the entire sound insulation box and reducing the transmission of noise. Another part of the noise will enter the sound-absorbing cavity through the folded through-hole. When the noise wave hits the surface of the sound-absorbing airbag, it will cause the air in the airbag to vibrate. This vibration dissipates energy through the tiny pores inside the sound-absorbing airbag, and finally converts the noise into heat energy and dissipates it into the surrounding environment, thereby achieving effective noise control and reducing the noise transmission when the electric push rod is in use.

[0017] 2. The utility model welds four guide rods inside the transmission cavity. When the motor is started to move the inner tube sleeve up and down, the fixed block will move synchronously on the guide rod. The movement of the fixed block will stretch or compress the buffer spring. When the buffer spring is stretched or compressed, it will generate an opposite force, which can effectively reduce the impact force generated by the inner tube sleeve during the up and down movement, avoid large mechanical vibrations and sharp noises when the lifting table is quickly raised or lowered, and make the lifting process of the lifting table more stable and quiet, thereby improving the user experience.

[0018] 3. The utility model provides ball grooves on the inner wall of the transmission cavity and the outer side of the fixed block, and balls are arranged between the ball grooves. When the motor is started to drive the inner tube sleeve to move up and down, the balls will roll in the ball grooves, thereby greatly reducing the direct contact area between the fixed block and the inner wall of the transmission cavity, thereby reducing the noise and wear caused by friction. The rolling friction coefficient of the balls is much lower than the sliding friction, so it can significantly improve the efficiency and stability of the transmission, making the operation of the lifting table quieter.

[0019] 4. The utility model provides a transmission worm wheel on the outer wall of the first rotating rod. When the motor is started to move the inner tube sleeve up and down, the motor will rotate the transmission worm through the second rotating rod. The transmission worm and the transmission worm wheel are driven by worm gear, and the worm gear drive has self-locking properties. When the lifting table reaches the required height and stops moving, even if it is subjected to external forces such as slight vibration, tilting or manual pushing and pulling, the lifting table can maintain a stable position without accidentally sliding down or moving, which greatly improves the safety and reliability of the use of the lifting table. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional mechanism of the present utility model;

[0021] Figure 2 This is a front view schematic diagram of the internal structure of the utility model;

[0022] Figure 3This is a schematic top view of the internal structure of the sound insulation box of the present invention;

[0023] Figure 4 This is a schematic top view of the internal structure of the transmission chamber of the present invention;

[0024] Figure 5 For the utility model Figure 2 A partial enlarged view of area A in the middle;

[0025] Figure 6 For the utility model Figure 2 A partial enlarged view of area B in the middle.

[0026] In the figure: 1. Outer sleeve; 2. Sound insulation box; 3. Transmission chamber; 4. First rotating rod; 5. Threaded rod; 6. Inner sleeve; 7. Fixed block; 8. Guide rod; 9. Buffer spring; 10. Ball; 11. Ball groove; 12. Motor; 13. Second rotating rod; 14. Transmission worm gear; 15. Transmission worm; 16. Honeycomb sound insulation board; 17. Folding through hole; 18. Sound absorption chamber; 19. Sound-absorbing airbag. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-6 The utility model provides a technical solution: a low-noise electric push rod for a lifting table, comprising an outer tube sleeve 1, a sound insulation box 2 is provided on one side of the outer tube sleeve 1;

[0029] The outer sleeve 1 further comprises a transmission cavity 3, which is provided inside the outer sleeve 1. A first rotating rod 4 is provided at the lower end of the inner portion of the outer sleeve 1. A threaded rod 5 is fixed to the upper end of the first rotating rod 4. The outer portion of the threaded rod 5 is threadedly connected to an inner sleeve 6. One end of the inner sleeve 6 extends to the outside of the outer sleeve 1, and the inner sleeve 6 and the outer sleeve 1 are slidably engaged. Four fixing blocks 7 are provided on the lower side of the outer wall of the inner sleeve 6 and are equidistantly distributed in an annular shape.

[0030] It also includes a honeycomb sound insulation board 16, which is arranged on the inner side of the sound insulation box 2. The outer side of the honeycomb sound insulation board 16 is provided with a sound absorption cavity 18, and the inside of the sound absorption cavity 18 is adhered and fixed with a sound absorption airbag 19.

[0031] During use, the starting motor 12 drives the second rotating rod 13 to rotate through the coupling, and then drives the transmission worm 15 to engage with the transmission worm wheel 14, so that the first rotating rod 4 and the threaded rod 5 rotate synchronously. The rotation of the threaded rod 5 is converted into the vertical lifting of the inner tube sleeve 6. The inner tube sleeve 6 is axially limited by the fixed block 7 and the guide rod 8 to achieve smooth lifting. The worm transmission ensures that the desktop is stable and does not slide down. At the same time, the buffer spring 9 absorbs kinetic energy during the lifting process, slows down the speed, and reduces noise. The ball 10 rolls in the ball groove 11 to further reduce friction noise. The noise generated by the motor 12 is dispersed through the honeycomb sound insulation board 16, and the folded through hole 17 consumes part of the noise, which is then absorbed by the sound-absorbing airbag 19 in the sound-absorbing cavity 18, thereby achieving effective noise control and improving the comfort of use.

[0032] See also Figure 2 and Figure 3 A transmission worm wheel 14 is provided on the outer wall of the first rotating rod 4, and a transmission worm 15 is provided behind the transmission worm wheel 14. One end of the transmission worm 15 is rotatably connected to the transmission cavity 3, and a worm transmission is performed between the transmission worm 15 and the transmission worm wheel 14. The self-locking property of the worm transmission ensures that the lifting table can be firmly locked after reaching the set height, effectively preventing accidental sliding, and improving the safety and reliability of use;

[0033] See also Figure 3 , a motor 12 is provided inside the sound insulation box 2, and a second rotating rod 13 is provided at the output end of the motor 12 through a coupling. One end of the second rotating rod 13 passes through and extends into the interior of the transmission cavity 3, and the second rotating rod 13 rotates with the transmission cavity 3. One end of the second rotating rod 13 located inside the transmission cavity 3 is connected to the transmission worm 15. The motor 12 serves as a power source, and its output end is seamlessly connected to the second rotating rod 13 through a coupling, ensuring lossless power transmission, compact structure and high transmission efficiency, reducing energy loss in the transmission process, and making the lifting and lowering action of the lifting table faster and more powerful;

[0034] See also Figure 4 and Figure 5 Four guide rods 8 are welded inside the transmission cavity 3 and are distributed in an annular shape and at equal distances. The guide rods 8 all pass through the fixed block 7 and slide with the fixed block 7. The four guide rods 8 provide a stable moving track for the fixed block 7. The fixed block 7 slides freely on the guide rods 8 to ensure the linearity and stability of the lifting action, effectively limit the moving direction of the fixed block 7, prevent the inner tube sleeve 6 from deflecting and shaking during the lifting process, and improve the stability and durability of the overall structure.

[0035] See also Figure 5, a buffer spring 9 is sleeved on the upper side of the outer portion of the guide rod 8, one end of the buffer spring 9 is connected to the transmission cavity 3, and the other end of the buffer spring 9 is connected to the fixed block 7. When the fixed block 7 moves, the buffer spring 9 can absorb and release energy, slow down the impact, and effectively reduce the noise and vibration caused by mechanical collision during the lifting process, thereby improving the comfort and quietness of use;

[0036] See also Figure 5 , ball grooves 11 are opened on the outer side of the fixed block 7 and the inner wall of the transmission cavity 3, and there are four ball grooves 11 on the inner wall of the transmission cavity 3 in a circular and equidistant manner. Balls 10 are set inside the ball grooves 11, and the balls 10 roll with the ball grooves 11. The rolling of the balls 10 in the ball grooves 11 significantly reduces the noise and wear caused by friction of the fixed block 7, making the operation of the lifting table smoother and quieter;

[0037] See also Figure 3 and Figure 6 There are several folded through holes 17 distributed in a rectangular array between the honeycomb sound insulation board 16 and the sound absorbing cavity 18. The noise will be reflected and consumed multiple times when passing through the folded through holes 17. After entering the sound absorbing cavity 18, it will be fully absorbed by the sound absorbing airbags 19, realizing all-round control and effective reduction of noise, creating a quieter use environment for users.

[0038] Working principle: When in use, start the motor 12, the motor 12 will rotate the second rotating rod 13 through the coupling, and the second rotating rod 13 will drive the transmission worm 15 to rotate synchronously. Due to the worm transmission between the transmission worm 15 and the transmission worm wheel 14, the transmission worm wheel 14 can drive the first rotating rod 4 to rotate synchronously, and the first rotating rod 4 will drive the threaded rod 5 to rotate synchronously, and the threaded rod 5 will drive the inner pipe sleeve 6 to rotate. The inner pipe sleeve 6 is fixedly connected to the fixed block 7, and the fixed block 7 is slidably matched with the guide rod 8, so the fixed block 7 will be axially limited, so that the rotation of the inner pipe sleeve 6 is converted into up and down vertical movement. The up and down movement of the inner pipe sleeve 6 can realize the lifting and lowering of the lifting table. Since there is a worm transmission between the transmission worm 15 and the transmission worm wheel 14, when the lifting table reaches the required height and stops moving, it can maintain a stable position without accidentally sliding or moving, thereby improving the safety and reliability of the use of the lifting table.

[0039] When the motor 12 drives the inner tube sleeve 6 to rise rapidly, the fixed block 7 will move rapidly along the guide rod 8. At this time, the buffer spring 9 is stretched, and the elastic potential energy inside it gradually accumulates. In this process, the buffer spring 9 buffers the rising speed of the inner tube sleeve 6 to a certain extent through its reverse force, effectively reducing the generation of noise. Conversely, when the motor 12 drives the inner tube sleeve 6 to descend, the buffer spring 9 changes from a stretched state to a compressed state, and also uses its elastic potential energy to slow down the descending speed of the inner tube sleeve 6, avoiding the impact and noise that may be caused by rapid descent. This two-way buffering effect makes the lifting process of the lifting table more stable and quiet. At the same time, when the fixed block 7 moves up and down, the ball 10 will roll synchronously in the ball groove 11, reducing the direct contact area between the fixed block 7 and the inner wall of the transmission cavity 3, reducing the noise and wear caused by friction, and making the operation of the lifting table quieter.

[0040] The motor 12 generates noise when it is working. When the noise is transmitted, it will first be dispersed and absorbed by the honeycomb sound insulation board 16 to reduce the transmission of the noise. Then part of the noise will enter the sound absorption cavity 18 through the folding through hole 17. When the noise passes through the folding through hole 17, part of the noise will be consumed by the folding through hole 17. After entering the sound absorption cavity 18, it will be absorbed by the sound-absorbing airbag 19, thereby achieving effective noise control and reducing the noise transmission when the electric push rod is in use.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A low-noise electric push rod for a lifting table, comprising an outer tube sleeve (1), a sound insulation box (2) provided on one side of the outer tube sleeve (1), characterized in that: It also includes a transmission cavity (3), which is opened inside the outer tube sleeve (1), a first rotating rod (4) is provided at the lower end inside the outer tube sleeve (1), a threaded rod (5) is fixed to the upper end of the first rotating rod (4), the outer thread of the threaded rod (5) is connected to the inner tube sleeve (6), one end of the inner tube sleeve (6) extends to the outside of the outer tube sleeve (1), and the inner tube sleeve (6) and the outer tube sleeve (1) are slidably matched, and four fixing blocks (7) are provided on the lower side of the outer wall of the inner tube sleeve (6) and are equidistantly distributed in an annular shape; It also includes a honeycomb sound insulation board (16) which is arranged on the inner side of the sound insulation box (2). The outer side of the honeycomb sound insulation board (16) is provided with a sound absorption cavity (18), and the interior of the sound absorption cavity (18) is adhered and fixed with a sound absorption air bag (19).

2. The low-noise electric linear actuator for a lifting table according to claim 1, characterized in that: A transmission worm wheel (14) is provided on the outer wall of the first rotating rod (4), and a transmission worm (15) is provided behind the transmission worm wheel (14). One end of the transmission worm (15) is rotationally connected to the transmission cavity (3), and worm transmission is performed between the transmission worm (15) and the transmission worm wheel (14).

3. The low-noise electric linear actuator for a lifting table according to claim 2, characterized in that: A motor (12) is provided inside the soundproof box (2), and a second rotating rod (13) is provided at the output end of the motor (12) through a coupling, one end of the second rotating rod (13) passes through and extends into the interior of the transmission cavity (3), and the second rotating rod (13) is rotationally matched with the transmission cavity (3), and one end of the second rotating rod (13) located inside the transmission cavity (3) is connected to the transmission worm (15).

4. The low-noise electric linear actuator for a lifting table according to claim 1, characterized in that: Four guide rods (8) equidistantly distributed in a circular shape are welded inside the transmission cavity (3), and the guide rods (8) all pass through the fixed block (7), and the guide rods (8) all slide in conjunction with the fixed block (7).

5. The low-noise electric linear actuator for a lifting table according to claim 4, characterized in that: A buffer spring (9) is sleeved on the upper side of the outer portion of the guide rod (8), one end of the buffer spring (9) is connected to the transmission cavity (3), and the other end of the buffer spring (9) is connected to the fixed block (7).

6. The low-noise electric linear actuator for a lifting table according to claim 1, characterized in that: Ball grooves (11) are provided on the outer side of the fixed block (7) and the inner wall of the transmission cavity (3), and four ball grooves (11) are provided on the inner wall of the transmission cavity (3) in an annular shape and are evenly spaced. Balls (10) are provided inside the ball grooves (11), and the balls (10) are all in rolling engagement with the ball grooves (11).

7. The low-noise electric linear actuator for a lifting table according to claim 1, characterized in that: A plurality of folded through holes (17) distributed in a rectangular array are provided between the honeycomb sound insulation board (16) and the sound absorption cavity (18).

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