Electric mute electric push rod

Abstract

The utility model relates to the technical field of electric push rods, and provides an electric mute electric push rod, which comprises a motor, a cylinder body and a transmission mechanism, and adopts a series of innovative designs such as optimization of a motor structure, adoption of a high-precision engineering plastic transmission mechanism and a ball screw, arrangement of a damping device and use of a sound insulation shell. The noise of the electric push rod in the operation process is effectively reduced, low-noise even mute operation is achieved, the use experience is greatly improved, and the electric push rod is suitable for occasions with high noise requirements. Particularly, due to the adoption of the plastic transmission gear set, noise generated by metal friction is effectively avoided, the overall weight is remarkably reduced, the production cost is reduced, and the service life of equipment is prolonged by utilizing the self-lubricating characteristic of the plastic transmission gear set. The utility model has important innovativeness and practicability in technology, and opens up a new way for the development of the field of electric push rods.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric push rod technical field especially relates to a kind of electric mute electric push rod. BACKGROUND

[0002] Electric push rod as linear drive device, because it is easy to operate, driving efficiency is high and is widely used in medical, industrial, home and many other fields. However, the existing electric push rod often produces larger noise in the running process, which undoubtedly seriously affects the user's experience, and it can also cause the surrounding environment to be ignored. Especially in the medical place and residence that need to keep quiet environment, noise problem is particularly prominent, it can affect the rest and rehabilitation of patient, also can disturb the daily life of resident. Therefore, developing a kind of low noise even mute electric push rod has extremely important practical significance. SUMMARY

[0003] The utility model discloses an electric mute electric push rod, to solve the problem of the running noise of electric push rod in prior art.

[0004] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] The utility model provides an electric mute electric push rod, including motor, cylinder body and transmission mechanism, the transmission mechanism is located inside the cylinder body, the transmission mechanism includes gear set, screw rod and nut pair, the gear set includes turbine, transmission helical gear and screw rod helical gear;

[0006] The motor output end is positioned through rolling ball bearing, and the motor output end extends turbine, the turbine is driven screw rod helical gear rotation through a plurality of transmission helical gears, the turbine is located at the bottom side of rolling ball bearing, the transmission helical gear is located at the right side of turbine, the screw rod helical gear is located at the right side of transmission helical gear;

[0007] The cylinder body is internally sleeved with telescopic pipe, the bottom side of telescopic pipe is fixedly connected with nut pair, the nut pair is threadedly sleeved on screw rod, the bottom side of screw rod is connected with spline, the screw rod helical gear is driven screw rod rotation through spline, and then is converted into the up-down thrust of nut pair.

[0008] Preferably, the bottom side of the motor is provided with a damping device ， Can effectively absorb the vibration generated when motor is running, to reduce the transmission of noise.

[0009] Preferably, the cylinder body is further provided with a stroke control system, by accurately controlling the speed and torque of the motor, further optimizing the stability of operation, reducing noise.

[0010] Preferably, the ball screw structure is adopted between the lead screw and the nut.

[0011] Preferably, a self-locking torsion spring is arranged inside the cylinder.

[0012] Preferably, a lead device is arranged inside the cylinder, and the lead device and the telescopic pipe are made of high-quality sound insulation materials such as rubber or foamed plastic, which effectively insulate noise from spreading outside.

[0013] Preferably, the gears in the gear set are made of high-strength engineering plastics, which can effectively avoid noise generated by metal friction.

[0014] Preferably, the motor is a low-noise direct current motor.

[0015] Beneficial effects:

[0016] Compared with the prior art, the electric mute electric push rod provided by the utility model has the advantages that: the utility model has a series of innovative designs such as optimizing the motor structure, adopting a high-precision engineering plastic transmission mechanism, a ball screw, arranging a damping device and using a sound insulation shell, effectively reduces noise generated by the electric push rod during operation, realizes low-noise or even mute operation, greatly improves the use experience and is suitable for occasions with high noise requirements. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative labor.

[0018] Fig. 1 The drawing is the overall structure schematic diagram of the electric mute electric push rod of the utility model.

[0019] Fig. 2 The drawing is the internal structure analysis schematic diagram of the electric mute electric push rod of the utility model.

[0020] In the figure: 1-motor, 2-bearing, 3-turbine, 4-gear bevel gear, 5 screw bevel gear, 7-key, 8-nut pair, 9-screw, 10-lead device, 11-stroke control system, 12-telescopic tube, 13-cylinder, 14-damping device, 15-self-locking torsion spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently 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 protection scope of the utility model.

[0022] Embodiment 1

[0023] Please refer to the drawings Figs. 1-2 A kind of electric mute electric push rod provided by the utility model, including motor 1, cylinder 13 and transmission mechanism, transmission mechanism is arranged in the inside of cylinder 13, transmission mechanism includes gear set, screw 9 and nut pair 8, gear set includes turbine 3, gear bevel gear 4 and screw bevel gear 5;

[0024] Motor 1 output end is positioned by rolling ball bearing 2, to guarantee coaxial, and motor 1 output end extends turbine 3, turbine 3 drives screw bevel gear 5 rotation by multiple gear bevel gear 4, turbine 3 is arranged at the bottom side of rolling ball bearing 2, gear bevel gear 4 is arranged at the right side of turbine 3, screw bevel gear 5 is arranged at the right side of gear bevel gear 4.

[0025] Cylinder 13 inside is sleeved with telescopic tube 12, the bottom side of telescopic tube 12 is fixedly connected with nut pair 8, nut pair 8 is threadedly sleeved on screw 9, screw 9 bottom side is connected with key 7, screw bevel gear 5 drives screw 9 rotation by key 7, and then converts into the up and down thrust of nut pair 8.

[0026] Gear bevel gear 4 transmits the rotating force of turbine 3 to screw bevel gear 5 by twice bevel gear cooperation, screw bevel gear 5 is transmitted to the rotating force of screw 9 by key 7 connected with the tail of screw 9, and then converts into the up and down thrust of nut pair 8. Gear set adopts high-precision bevel gear design, which not only can increase the stability of transmission, but also can effectively reduce the vibration and noise generated in the operation process.

[0027] The ball screw structure is adopted between the lead screw 9 and the nut pair 8, which has small friction coefficient and high transmission efficiency, further reducing the generation of noise. Among them, the gears in the gear set are made of high-strength engineering plastic. This material not only has excellent self-lubricating property, but also can effectively avoid the noise generated by metal friction, especially at low speed, its performance is particularly excellent, which can ensure that the push rod can operate at low noise in various working conditions.

[0028] The motor 1 is provided with a damping device 14 at the bottom side.

[0029] The damping device 14 is specially arranged at the connection between the motor 1 and the transmission mechanism, which can effectively absorb the vibration generated during the operation of the motor 1, thereby reducing the transmission of noise. The damping effect is remarkable, which can provide strong guarantee for the silent operation of the push rod.

[0030] The cylinder body 13 is also provided with a stroke control system 11, which can further optimize the stability of operation and reduce noise by accurately controlling the speed and torque of the motor. The control system has high sensitivity and reliability, which can adjust the operation state of the push rod in real time according to different working requirements, ensuring that it can operate at low noise, high efficiency and stability in various conditions.

[0031] The cylinder body 13 is also provided with a self-locking torsion spring 15, which enhances the self-locking force of the electric push rod.

[0032] The cylinder body 13 is provided with a lead device 10, and the lead device 10 and the telescopic pipe 12 are made of high-quality sound insulation materials such as rubber or foamed plastic, which can effectively isolate noise from spreading outside. This design not only can reduce the noise radiation of the push rod itself, but also can prevent external noise from interfering with the internal structure, further improving the silent performance of the push rod

[0033] The motor 1 adopts an optimized low-noise direct current motor. Through careful design of the internal structure of the motor 1, electromagnetic interference and mechanical friction are significantly reduced, thereby fundamentally reducing the generation of noise. This motor can maintain high stability during operation, providing reliable power support for the entire push rod system.

[0034] Working principle and use method: after the motor starts, the transmission helical gear 4 transmits the rotating force of the turbine 3 to the lead screw helical gear 5 through twice helical gear cooperation, the lead screw helical gear 5 transmits the rotating force to the lead screw 9 through the spline 7 connected with the tail 6 of the lead screw, and then converts it into the up-down thrust of the nut pair 8, realizes the output of the electric mute thrust. The gear set adopts high-precision helical gear design, which not only can increase the stability of transmission, but also can effectively reduce the vibration and noise generated in the running process. Through a series of innovative designs such as adopting high-precision engineering plastic transmission mechanism, setting shock-absorbing device and using sound insulation shell, the noise of the electric push rod in the running process is effectively reduced, the low-noise or even mute operation is realized, the use experience is greatly improved, and it is suitable for occasions with high noise requirement. Especially the plastic transmission gear set is adopted, which not only effectively avoids the noise generated by metal friction, significantly reduces the overall weight and production cost, but also prolongs the service life of the equipment by using its self-lubricating property.

[0035] The utility model provides a kind of electric mute electric push rod, by optimizing motor structure, adopt high-precision engineering plastic transmission mechanism, ball screw, set up plastic gear, built-in self-locking torsion spring, shock-absorbing device and use sound insulation shell etc. Series of innovative designs, effectively solve the problem of big electric push rod operating noise in prior art, with important application value. Especially the plastic transmission gear set is introduced, and it is outstanding in reducing noise, reducing weight and reducing cost, further improves the market competitiveness of product. This invention brings new opportunities and challenges for the development of electric push rod field.

[0036] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electrically powered, silent electric trolley, characterised in that Including motor (1), cylinder (13) and transmission mechanism, the transmission mechanism is arranged in the inside of cylinder (13), the transmission mechanism includes gear set, screw rod (9) and nut pair (8), the gear set includes turbine (3), transmission helical gear (4) and screw rod helical gear (5); The output end of the motor (1) is positioned by the rolling ball bearing (2), and the output end of the motor (1) extends the turbine (3), the turbine (3) drives the screw rod helical gear (5) to rotate through a plurality of transmission helical gears (4), the turbine (3) is arranged at the bottom side of the rolling ball bearing (2), the transmission helical gear (4) is arranged at the right side of the turbine (3), and the screw rod helical gear (5) is arranged at the right side of the transmission helical gear (4); The inside of the cylinder (13) is sleeved with the telescopic pipe (12), the bottom side of the telescopic pipe (12) is fixedly connected with the nut pair (8), the nut pair (8) is threadedly sleeved on the screw rod (9), the bottom side of the screw rod (9) is connected with the spline (7), the screw rod helical gear (5) drives the screw rod (9) to rotate through the spline (7), and then the up and down thrust of the nut pair (8) is converted.

2. The electric silent electric trolley according to claim 1, characterized in that, The bottom side of the motor (1) is provided with a damping device (14), which can effectively absorb the vibration generated during the operation of the motor (1), thereby reducing the transmission of noise.

3. The electric silent electric trolley according to claim 1, characterized in that, The inside of the cylinder (13) is also provided with a stroke control system (11), by accurately controlling the rotating speed and torque of the motor, further optimizing the stability of operation, reducing noise.

4. The electrically quiet electric push rod of claim 1, wherein, The ball screw structure is adopted between the screw rod (9) and the nut pair (8).

5. The electrically quiet electric push rod of claim 4, wherein, The inside of the cylinder (13) is also provided with a self-locking torsion spring (15).

6. The electrically quiet electric push rod of claim 3, wherein, The inside of the cylinder (13) is provided with a lead device (10), the lead device (10) and the telescopic pipe (12) are made of high-quality sound insulation material, which effectively isolates the noise from spreading outside.

7. The electric quiet electric trolley according to any one of claims 1 to 6, characterized in that The gears in the gear set are made of high-strength engineering plastic, which can effectively avoid the noise generated by metal friction.

8. The electrically quiet electric push rod of claim 7, wherein, The motor (1) adopts a low-noise direct current motor.

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