Mute electric push rod for electric lifting chair

Abstract

The utility model discloses a noiseless electric push rod for an electric lifting chair, which comprises a noiseless shell, a rod cylinder is arranged in the noiseless shell, a rod body is arranged in the rod cylinder, one end of the rod body extends to the outside of the rod cylinder, a motor is arranged on one side of the upper end of the rod cylinder, and the other side of the upper end of the rod cylinder is provided with a motor. A buffer cavity is formed in one side of the upper end of the interior of the mute shell and located over the motor, a lifting plate is arranged in the buffer cavity, a connecting rod is fixedly adhered to the middle position of the lower end of the lifting plate, and the lower end of the connecting rod is connected with the upper end of the motor; a temperature sensor is arranged on the upper side of one side of the interior of the mute shell, and four first guide rods which are annularly distributed at equal intervals are welded to one side of the interior of the rod barrel. The mute electric push rod for the electric lifting chair can ensure that the vibration of the motor is effectively absorbed and the influence on the outside is reduced, so that the noise reduction of the motor is realized, and the mute effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric push rod technical field, concretely is a kind of mute electric push rod for electric lifting chair. BACKGROUND

[0002] Electric lifting chair is a kind of height-adjustable chair, is widely used in family, school, office and design studio and a variety of occasions, its design aims to adapt to different height and use demand, realizes the lifting function of seat board by electric drive system, the seat board of electric lifting chair not only can carry out height adjustment, can also be adjusted angle according to the demand of user, it is very suitable for reading, writing, painting, design and a variety of sitting posture demand, in addition, electric lifting chair is usually equipped with lifting positioning device, can be positioned on various heights, ensure the stability and safety of use, this kind of chair structure is reasonable, it is easy to use, simple operation can effectively improve the comfort and work efficiency of user, mute electric push rod used by electric lifting chair has the remarkable advantages such as small noise, environmental protection and energy saving, high efficiency and stability, the noise of mute electric push rod is extremely low when working, can effectively protect the hearing of user.

[0003] The existing patent with the announcement number CN211300922U discloses a mute type medical bed special electric push rod, which comprises a driving part, a transmission part and an electric push rod body, the electric push rod body is connected to the output end of the transmission part, the output end of the driving part is electrically connected with the input end of the transmission part, a positioning screw cylinder covered outside the driving part is fixedly connected to the side of the transmission part close to the driving part, a protective shell covered outside the driving part is threadedly connected to the outer wall of the positioning screw cylinder, a limiting mechanism for further limiting the protective shell is connected to the outer wall of the transmission part, a fixed block is fixedly connected to the output end of the electric push rod body, a U-shaped positioning plate is fixedly connected to the end of the fixed block away from the electric push rod body, a connecting plate is fixedly connected to the side of the U-shaped positioning plate away from the fixed block, a layer of sound insulation cotton is fixedly connected to the inner side wall of the protective shell, and a fixed ring plate is fixedly connected to the inner wall of the end of the protective shell close to the transmission part.

[0004] Although the above-mentioned scheme has excellent sound insulation performance for the driving part, making the use of the electric push rod mute, when the electric lifting chair is used, the motor will vibrate during starting and running, and the vibration cannot be effectively suppressed, resulting in transmission to the push rod and the surrounding structure, thereby generating a large noise, therefore, it does not meet the existing demand, for this, we propose a mute electric push rod for electric lifting chair. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a mute electric push rod for electric lifting chair, to solve the problem of generating large noise due to the up and down vibration caused by motor starting when the electric push rod is used, affecting use.

[0006] In order to achieve the above object, the utility model provides following technical scheme: A kind of mute electric push rod for electric lifting chair, including mute shell, the inside of the mute shell is provided with stem cylinder, the inside of the stem cylinder is provided with stem body, and the one end of stem body extends to the outside of stem cylinder, the side of stem cylinder upper end is provided with motor, the side of the inside of the mute shell upper end is provided with buffer cavity, and buffer cavity is located directly above motor, the inside of the buffer cavity is provided with lifting plate, connecting rod is fixedly attached to the middle position of the lower end of lifting plate, and the lower end of connecting rod is connected with the upper end of motor, the upper side of the inside of the mute shell one side is provided with temperature sensor.

[0007] Preferably, four first guide rods are welded on one side of the inside of the stem cylinder, the lower side of the outer wall of the stem body is welded with four guide blocks, the guide blocks are penetrated by the first guide rods, two groups of balls are arranged in the guide blocks, and each group of balls is arranged in a ring shape and equally spaced, and the balls are in rolling fit with the stem body.

[0008] Preferably, four second guide rods are welded in the inside of the buffer cavity, the second guide rods penetrate the lifting plate, and the second guide rods are in sliding fit with the lifting plate.

[0009] Preferably, a buffer spring is sleeved on the lower side of the outside of the second guide rod, one end of the buffer spring is connected with the lifting plate, and the other end of the buffer spring is connected with the buffer cavity.

[0010] Preferably, a controller is arranged on one side of the buffer cavity, the input end of the controller is electrically connected with the output end of the temperature sensor, and a cooling fan is installed below the temperature sensor, and the input end of the cooling fan is electrically connected with the output end of the controller.

[0011] Preferably, a damper is installed on the upper end of the inside of the buffer cavity, and the lower end of the damper is connected with the lifting plate.

[0012] Preferably, a first rotating rod is rotatably installed on one side of the inside of the stem cylinder, the first rotating rod is drivingly connected with the motor through a coupling, a second rotating rod is rotatably installed on the other side of the inside of the stem cylinder, a threaded rod is arranged on the upper end of the second rotating rod, the threaded rod is in threaded connection with the stem body, a transmission gear is arranged on the outer wall of the first rotating rod and the second rotating rod, and the transmission gears are in meshing connection.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1.The utility model discloses a buffer cavity is set up to the one side of the upper end in the mute shell inside, when the motor vibration is generated after starting, the vibration can be transmitted to the lifting plate through the connection of connecting rod, and the lifting plate will synchronously carry out the up and down of lifting, thereby the amplitude of the up and down movement of the lifting plate can be reduced through the buffer elasticity of buffer spring, and the motor is buffered, and the damper will generate additional resistance to the up and down movement of the lifting plate, further slow down and stabilize the speed of the lifting plate, ensure that the motor vibration is effectively absorbed and reduces the influence to the outside, and then realize the noise reduction of the motor, improve the mute effect.

[0015] 2.The utility model discloses a temperature sensor is arranged on the upside of the one side in the mute shell inside, and the heat dissipation fan is arranged below the temperature sensor, when the motor generates heat when frequently using the electric push rod, and the temperature sensor will monitor the temperature in the inside, and the temperature data of monitoring is sent to the controller through the electric signal, when the temperature is too high, the controller will start the heat dissipation fan, and the hot air is discharged, effectively takes away the heat, reduces the temperature, thereby prevents the motor from being damaged or the performance from falling due to overheating.

[0016] 3.The utility model discloses four ring-shaped equidistance distribution guide blocks are arranged on the downside of the outer wall of the rod body, when the rod body moves up and down, the ball in the inside of guide block will move up and down with the first guide rod, since the contact between the ball and the first guide rod is point contact, compared with the surface contact between the guide block and the first guide rod, the friction coefficient is reduced significantly, this helps to reduce the friction resistance in the sliding process, thereby reducing the generation of noise, when the ball rolls on the first guide rod, can keep higher stability, the vibration and impact of the rolling friction of the ball are smaller, and therefore the noise generated is also lower. ACCURACY OF DRAWINGS

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0018] Figure 2 It is the inside structure front view schematic diagram of the utility model;

[0019] Figure 3 It is the rod barrel inside structure plan schematic diagram of the utility model;

[0020] Figure 4 It is the Figure 2 A area local amplification drawing of the utility model;

[0021] Figure 5 It is the Figure 3 B area local amplification drawing of the utility model.

[0022] In the figure: 1, mute shell; 2, rod barrel; 3, motor; 4, first rotating rod; 5, transmission gear; 6, second rotating rod; 7, threaded rod; 8, rod body; 9, first guide rod; 10, guide block; 11, ball; 12, temperature sensor; 13, cooling fan; 14, controller; 15, buffer cavity; 16, second guide rod; 17, lifting plate; 18, buffer spring; 19, connecting rod; 20, damper. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-5 The utility model provides a kind of mute electric push rod for electric lifting chair, including mute shell 1, mute shell 1 is provided with rod barrel 2 in its inside, rod barrel 2 is provided with rod body 8 in its inside, and one end of rod body 8 extends to the outside of rod barrel 2, the side of rod barrel 2 upper end is provided with motor 3, buffer cavity 15 is set in the side of mute shell 1 inside upper end, and buffer cavity 15 is located directly above motor 3, lifting plate 17 is provided in the inside of buffer cavity 15, and connecting rod 19 is fixedly attached to the middle position of the lower end of lifting plate 17, and the lower end of connecting rod 19 is connected with the upper end of motor 3, temperature sensor 12 is provided on the upside of one side of mute shell 1 inside.

[0025] When using, after starting motor 3, it drives first rotating rod 4 to rotate by coupling, in turn drives transmission gear 5 to mesh transmission, makes second rotating rod 6 and threaded rod 7 synchronous rotation, the rotation of threaded rod 7 promotes rod body 8 to move stably up and down under the cooperation of first guide rod 9 and guide block 10, realizes the lifting function of electric lifting chair, ball 11 in guide block 10 reduces friction, reduces noise, simultaneously, the vibration of motor 3 is transmitted to lifting plate 17 by connecting rod 19, slides under the guidance of second guide rod 16, and slows down by buffer spring 18 and damper 20, enhances stability and mute effect, temperature sensor 12 monitors temperature in mute shell 1, when exceeding preset value, controller 14 starts cooling fan 13, effectively cools down, protects motor 3 from overheating damage.

[0026] Please refer to Figure 3 And Figure 5The lower side of the outer wall of the rod body 8 is welded with four ring-shaped equidistant guide blocks 10, the guide blocks 10 are penetrated by the first guide rods 9, the inside of the guide blocks 10 is provided with two groups of rolling balls 11, each group of rolling balls 11 is ring-shaped equidistantly distributed with four rolling balls 11, the rolling balls 11 are in rolling fit with the rod body 8, the cooperation of the first guide rods 9 with the guide blocks 10 and the rolling balls 11 can ensure the stability and precision of the rod body 8 in the moving process, and the rolling contact of the rolling balls 11 significantly reduces the friction resistance, reduces the noise, and improves the operation efficiency of the whole system;

[0027] Please refer to Figure 4 The inside of the buffer cavity 15 is welded with four ring-shaped equidistant second guide rods 16, the second guide rods 16 penetrate the lifting plate 17, and the second guide rods 16 are in sliding fit with the lifting plate 17, the second guide rods 16 provide a stable sliding track for the lifting plate 17, ensure the directionality and stability of the lifting plate in the up-down moving process, avoid deviation and shaking, and improve the reliability and safety of the system;

[0028] Please refer to Figure 4 The lower side of the outside of the second guide rod 16 is sleeved with a buffer spring 18, one end of the buffer spring 18 is connected with the lifting plate 17, and the other end of the buffer spring 18 is connected with the buffer cavity 15, the buffer spring 18 can effectively absorb the impact energy generated by the lifting plate 17 in the up-down moving process, realize the effect of buffering and damping, and further improve the stability and durability of the system;

[0029] Please refer to Figure 2 One side of the buffer cavity 15 is provided with a controller 14, an input end of the controller 14 is electrically connected with an output end of the temperature sensor 12, a heat dissipation fan 13 is installed below the temperature sensor 12, and an input end of the heat dissipation fan 13 is electrically connected with an output end of the controller 14, the temperature sensor 12 can monitor the temperature in the mute shell 1 in real time, and control the start and stop of the heat dissipation fan 13 through the controller 14, effectively prevent the motor from overheating, protect the normal operation of the system, improve the reliability and service life of the equipment;

[0030] Please refer to Figure 4 A damper 20 is installed at the upper end in the buffer cavity 15, and a lower end of the damper 20 is connected with the lifting plate 17, the damper 20 can provide additional resistance for the up-down movement of the lifting plate 17, further slow down and stabilize the movement speed, effectively reduce the influence of motor vibration on the outside, and improve the mute effect;

[0031] Please refer to Figure 2The first rotating rod 4 is rotatably arranged on one side of the inside of the rod barrel 2 and is in transmission connection with the motor 3 through a shaft coupling, the second rotating rod 6 is rotatably arranged on the other side of the inside of the rod barrel 2, the upper end of the second rotating rod 6 is provided with a threaded rod 7, the threaded rod 7 is in threaded connection with a rod body 8, the outer walls of the first rotating rod 4 and the second rotating rod 6 are both provided with transmission gears 5, the transmission gears 5 are in meshing connection, the motor 3 drives the first rotating rod 4 to rotate through the shaft coupling, and then drives the second rotating rod 6 and the threaded rod 7 to synchronously rotate through the meshing transmission of the transmission gears 5, so that the up-and-down movement of the rod body 8 is realized, and the transmission mode has the advantages of simple structure, high transmission efficiency and the like and can ensure the stability and precision of the movement of the rod body 8.

[0032] Working principle: when in use, the motor 3 is started, the output end of the motor 3 drives the first rotating rod 4 to rotate through the shaft coupling, the first rotating rod 4 drives one of the transmission gears 5 to rotate, the second rotating rod 6 drives the threaded rod 7 to rotate under the meshing transmission of the two transmission gears 5, the threaded rod 7 drives the rod body 8 to synchronously vibrate, the rod body 8 is limited and moves up and down under the cooperation of the guide block 10 and the first guide rod 9, the up-and-down movement of the electric lifting chair is realized, the guide block 10 and the first guide rod 9 are in contact through the rolling of the ball 11, which helps to reduce the frictional resistance in the sliding process, thereby reducing the generation of noise, the vibration generated when the motor 3 is started is transmitted to the lifting plate 17 through the connecting rod 19, the lifting plate 17 slides on the second guide rod 16, the second guide rod 16 limits the direction of the lifting plate 17, avoids the deviation of the lifting plate 17, the lifting plate 17 is pressed or stretched when sliding up and down, thereby buffering the lifting plate 17 through the buffering of the buffer spring 18, reducing the amplitude of the up-and-down movement of the lifting plate 17, the damper 20 generates additional resistance to the up-and-down movement of the lifting plate 17, further slows down and stabilizes the speed of the lifting plate, effectively absorbs the vibration of the motor 3 and reduces the influence on the outside, thereby realizing the noise reduction of the motor and improving the mute effect, if the motor 3 is frequently used, a large amount of heat will be generated in the mute shell 1, the temperature sensor 12 monitors the temperature in the mute shell 1 during daily use, the monitored temperature is sent to the controller 14 through an electric signal, the standard temperature value can be set in the controller 14 in advance, when the monitored temperature exceeds the preset value, the controller 14 starts the cooling fan 13, the cooling fan 13 draws the internal airflow out of the mute shell 1 after being started, effectively takes away the heat and reduces the temperature, thereby preventing the motor 3 from being damaged or the performance from being reduced due to overheating.

[0033] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A silent electric push rod for electric lift chair, comprising a silent housing (1), characterized in that: The inside of the mute shell (1) is provided with a rod barrel (2), the inside of the rod barrel (2) is provided with a rod body (8), one end of the rod body (8) extends to the outside of the rod barrel (2), one side of the upper end of the rod barrel (2) is provided with a motor (3), one side of the upper end of the inside of the mute shell (1) is provided with a buffer cavity (15), and the buffer cavity (15) is located directly above the motor (3), the inside of the buffer cavity (15) is provided with a lifting plate (17), the middle position of the lower end of the lifting plate (17) is adhesively fixed with a connecting rod (19), and the lower end of the connecting rod (19) is connected with the upper end of the motor (3), and the upper side of one side of the inside of the mute shell (1) is provided with a temperature sensor (12).

2. A silent electric push rod for an electric lift chair according to claim 1, characterized in that: Four first guide rods (9) are welded on one side of the inside of the rod barrel (2), four guide blocks (10) are welded on the lower side of the outer wall of the rod body (8), and the guide blocks (10) are penetrated by the first guide rods (9), two groups of rolling balls (11) are arranged in the guide blocks (10), and each group of rolling balls (11) is arranged in a ring shape and is equidistantly distributed, and the rolling balls (11) are in rolling fit with the rod body (8).

3. A silent electric push rod for an electric lift chair according to claim 1, characterized in that: Four second guide rods (16) are welded in the inside of the buffer cavity (15) and penetrate the lifting plate (17), and the second guide rods (16) are in sliding fit with the lifting plate (17).

4. A silent electric push rod for an electric lift chair according to claim 3, characterized in that: The lower side of the outside of the second guide rod (16) is sleeved with a buffer spring (18), one end of the buffer spring (18) is connected with the lifting plate (17), and the other end of the buffer spring (18) is connected with the buffer cavity (15).

5. The silent electric push rod for electric lift chair according to claim 1, wherein: One side of the buffer cavity (15) is provided with a controller (14), and the input end of the controller (14) is electrically connected with the output end of the temperature sensor (12), and the lower side of the temperature sensor (12) is provided with a cooling fan (13), and the input end of the cooling fan (13) is electrically connected with the output end of the controller (14).

6. A silent electric push rod for an electric lift chair according to claim 1, wherein: The upper end of the inside of the buffer cavity (15) is provided with a damper (20), and the lower end of the damper (20) is connected with the lifting plate (17).

7. A silent electric push rod for an electric lift chair according to claim 1, wherein: One side of the inside of the rod barrel (2) is rotatably provided with a first rotating rod (4), and the first rotating rod (4) is drivingly connected with the motor (3) through a shaft coupling, the other side of the inside of the rod barrel (2) is rotatably provided with a second rotating rod (6), the upper end of the second rotating rod (6) is provided with a threaded rod (7), and the threaded rod (7) is threadedly connected with the rod body (8), the outer walls of the first rotating rod (4) and the second rotating rod (6) are provided with transmission gears (5), and the transmission gears (5) are meshedly connected.

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