Low-noise electric push rod

Abstract

The utility model provides a low-noise electric push rod, and relates to the technical field of electric push rods. The middle of the transmission seat can be detached, a bearing is arranged at the rear end of the top of the transmission seat, a lead screw is connected into the bearing of the transmission seat in a penetrating mode, threads are arranged on the surface of a rod body of the lead screw, a push rod cylinder is installed at the rear end of the top of the transmission seat, and the lead screw is located in the middle of the interior of the push rod cylinder. A through cylindrical sliding groove is formed in the middle of the top of the push rod barrel. The buffer piece is arranged in the push rod barrel, when the push rod piece moves to the limiting position, the spring and the rubber contact piece of the buffer piece act together, impact energy is effectively absorbed, collision noise and vibration are remarkably reduced, and the electric push rod is kept in a low-noise state in the running process. The problem that when an existing push rod piece moves to a limit position, due to mechanical collision and impact, large noise and vibration are often generated, and an electric push rod and peripheral equipment are damaged is solved.

Description

Technical Field

[0001] This utility model belongs to the field of electric linear actuator technology, and more specifically, it relates to a low-noise electric linear actuator. Background Technology

[0002] In the field of electric linear actuator technology, with the increasing demands for equipment precision and noise control in industries such as industry, furniture, and medical, the demand for low-noise electric linear actuators is growing. Traditional electric linear actuators often generate significant noise during operation due to limitations in the motor, gears, and transmission structure. This not only affects the user experience of the equipment but may also cause interference to the surrounding environment.

[0003] Application number CN201820332733.9 discloses a low-noise electric push rod, comprising a cylindrical body and a power unit. The cylindrical body includes a cylindrical body, a fixed seat sliding inside the cylindrical body, a lead screw passing through the cylindrical body and the fixed seat, and a cover disposed on the upper part of the cylindrical body. The power unit includes a motor cover, in which a motor is disposed. A base is disposed at the lower part of the power unit and the cylindrical body, and a gear set is disposed on the base. The gear set is covered by a bottom cover detachably connected to the base. Sound insulation cotton is disposed between the double-layer structure of the motor cover and the bottom cover. The lower half of the lead screw is threaded, and the upper half of the lead screw is smooth. A sliding hole is longitudinally disposed at the lower part of the cylindrical body, and an oil storage groove is disposed on the upper inner wall of the cylindrical body. This electric push rod has good performance and low noise, and can provide users with a better experience when used in massage chairs.

[0004] Based on the above patent searches and understanding of the application of existing low-noise electric linear actuators, the following shortcomings still exist:

[0005] 1. During the operation of electric linear actuators, especially when the actuator moves to its limit position, mechanical collisions and impacts often generate significant noise and vibration. This not only affects the comfort of the user environment but may also damage the electric linear actuator itself and its surrounding equipment.

[0006] 2. The transmission components of electric linear actuators, such as transmission belts and lead screws, are key components for the operation of electric linear actuators. These components are prone to wear during long-term use. If they are not maintained and repaired in time, the transmission efficiency may decrease, or even abnormal noise may be generated, which will seriously affect the service life and performance of the electric linear actuator. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model provides a low-noise electric linear actuator. This solves the problem that when the actuator moves to its limit position, mechanical collisions and impacts often generate significant noise and vibration, which can damage the electric linear actuator itself and its surrounding equipment. Furthermore, the electric linear actuator components are prone to wear during long-term use, and if not maintained and repaired in a timely manner, this can lead to a decrease in transmission efficiency and even abnormal noise.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A low-noise electric linear actuator includes a transmission base; the transmission base is detachable at its middle position, and a bearing is provided at the top rear end of the transmission base. A lead screw passes through the bearing of the transmission base, and the surface of the lead screw is threaded. A push rod cylinder is installed at the top rear end of the transmission base, and the lead screw is located at the middle position inside the push rod cylinder. A through cylindrical groove is opened at the top middle position of the push rod cylinder, and strip-shaped limiting grooves are opened at both ends of the cylindrical groove of the push rod cylinder. A push rod component is slidably connected in the cylindrical groove of the push rod cylinder. Limit blocks are provided at both ends of the bottom of the push rod component, and the two limit blocks of the push rod component are located in the corresponding strip-shaped limiting grooves of the push rod cylinder. A buffer component is fixedly connected to the top and bottom ends of the two strip-shaped limiting grooves of the push rod cylinder. The buffer component has a telescopic structure design, and a spring is provided at the middle position of the buffer component. The inner contact part of the buffer component is made of rubber.

[0010] According to one embodiment of the present invention, a motor is fixedly installed at the top front end of the transmission seat, the motor shaft is sleeved inside the front end of the transmission belt, and the transmission belt is located in the middle of the transmission seat.

[0011] According to one embodiment of the present invention, the bottom position of the lead screw is located inside the transmission seat, and the bottom position of the lead screw is sleeved on the inner rear end position of the transmission belt.

[0012] According to one embodiment of the present invention, a mounting cylinder is provided at the top of the push rod, and a threaded hole is provided at the bottom of the push rod, with the lead screw located inside the threaded hole of the push rod.

[0013] According to one embodiment of the present invention, a cover plate is fixedly installed at the top position of the push rod cylinder, and the upper position of the push rod passes through the middle position of the cover plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The push rod cylinder is equipped with a buffer. When the push rod moves to its limit position, the spring and rubber contact of the buffer work together to effectively absorb the impact energy, significantly reducing collision noise and vibration, so that the electric push rod maintains a low noise state during operation.

[0016] The push rod cylinder is equipped with a strip-shaped limiting groove, which cooperates with the limiting block of the push rod component to ensure the stability and accuracy of the push rod component during the lifting process, and avoid noise and instability caused by deviation or shaking.

[0017] The transmission seat can be disassembled in the middle, which makes it convenient for users to regularly inspect and maintain key components such as the transmission belt and lead screw, such as by injecting lubricating oil. This effectively extends the service life of the electric push rod and avoids abnormal noise in the transmission position.

[0018] Because this utility model adopts an optimized transmission mechanism and buffer design, it reduces malfunctions and damage caused by wear and collision, thereby reducing the user's maintenance costs and time costs. Attached Figure Description

[0019] Figure 1 This is a side view schematic diagram of the low-noise electric actuator of this utility model.

[0020] Figure 2 This is a schematic diagram of the left-side half-section structure of the low-noise electric actuator of this utility model.

[0021] Figure 3 This is a half-sectional side view of the low-noise electric actuator of this utility model.

[0022] Figure 4 This is the utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0023] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0024] 1. Transmission base; 101. Motor; 102. Transmission belt; 103. Lead screw; 2. Push rod cylinder; 201. Cover plate; 202. Push rod; 203. Buffer. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The use of terms such as "a," "an," or "the" in this utility model patent application specification and claims does not indicate a quantity limitation, but rather indicates the presence of at least one. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0027] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0028] Example:

[0029] As attached Figure 1 To be continued Figure 4 As shown:

[0030] This utility model provides a low-noise electric actuator, including a transmission base 1; the middle position of the transmission base 1 is detachable, and a bearing is provided at the top rear end position of the transmission base 1, with a lead screw 103 passing through the bearing of the transmission base 1. The surface of the lead screw 103 is provided with threads. A push rod cylinder 2 is installed at the top rear end position of the transmission base 1, with the lead screw 103 located at the middle position inside the push rod cylinder 2. A through cylindrical groove is opened at the top middle position of the push rod cylinder 2, and both ends of the cylindrical groove of the push rod cylinder 2 are also provided with... A strip-shaped limiting groove is provided, and a push rod 202 is slidably connected in the cylindrical groove of the push rod cylinder 2. Limiting blocks are provided at both ends of the bottom of the push rod 202. The two limiting blocks of the push rod 202 are located in the corresponding strip-shaped limiting groove of the push rod cylinder 2. A buffer 203 is fixedly connected to the top and bottom ends of the two strip-shaped limiting grooves of the push rod cylinder 2. The buffer 203 is a telescopic structure design, and a spring is provided in the middle of the buffer 203. The inner contact part of the buffer 203 is made of rubber.

[0031] The transmission base 1 has a motor 101 fixedly installed at the top front end. The shaft of the motor 101 is sleeved inside the front end of the transmission belt 102. The transmission belt 102 is located in the middle of the transmission base 1. The bottom of the lead screw 103 is located inside the transmission base 1 and is sleeved inside the rear end of the transmission belt 102. The motor 101 drives the transmission belt 102 to rotate, which in turn drives the lead screw 103 to rotate within the bearing.

[0032] The push rod 202 has an installation cylinder at its top and a threaded hole at its bottom, with the lead screw 103 located inside the threaded hole of the push rod 202.

[0033] The push rod cylinder 2 has a cover plate 201 fixedly installed at the top position, and the push rod 202 passes through the middle position of the cover plate 201 at the top position.

[0034] In use: The motor 101 drives the transmission belt 102 to rotate, which in turn drives the lead screw 103 to rotate within the bearing. At this time, the lead screw 103 engages with the threaded hole of the push rod 202, and the push rod 202 can be adjusted in height within the push rod cylinder 2. When the push rod 202 slides upward within the push rod cylinder 2 to its maximum extension limit, the top positions of the two limit blocks designed for the push rod 202 contact the rubber positions of the buffer 203 designed above the top of the two strip-shaped limit grooves of the push rod cylinder 2. This prevents the push rod 202 from colliding with the top of the push rod cylinder 2 and causing noise when it is in its maximum extension state. At the same time, the spring and rubber contact of the buffer 203 work together to absorb impact energy and reduce noise and vibration.

[0035] When the push rod 202 slides downward inside the push rod cylinder 2 to adjust to the minimum contraction limit, the bottom positions of the two limiting blocks designed for the push rod 202 are in contact with the rubber positions of the buffer 203 designed below the top of the two strip limiting grooves of the push rod cylinder 2. This prevents the push rod 202 from colliding with the bottom of the push rod cylinder 2 and generating noise when it is in the minimum contraction state. At the same time, the spring and rubber contact of the buffer 203 work together to absorb the impact energy and reduce noise and vibration.

[0036] During maintenance, the middle part of the transmission seat 1 is disassembled, and lubricating oil is injected into the surface of the transmission belt 102 and the lead screw 103 to increase the service life of the push rod and reduce the noise of the transmission position.

[0037] Although this application has been described with reference to the foregoing embodiments, those skilled in the art will understand that various changes can be made without departing from the spirit and scope of this application as defined by the appended claims. While this specification contains details of many specific implementations, these should not be construed as limiting the scope of the claims, but rather as descriptions of features specific to particular embodiments. The scope of this application is defined by the appended claims and their equivalents, and is not limited to the embodiments described above.

Claims

1. A low-noise electric linear actuator, characterized in that: The transmission base (1) is included; the middle position of the transmission base (1) can be split, and a bearing is provided at the top rear end position of the transmission base (1), and a lead screw (103) is inserted through the bearing of the transmission base (1). The surface of the lead screw (103) is provided with threads. A push rod cylinder (2) is installed at the top rear end position of the transmission base (1). The lead screw (103) is located at the middle position inside the push rod cylinder (2). A through cylindrical groove is opened at the top middle position of the push rod cylinder (2), and strip-shaped limits are opened at both the front and rear ends of the cylindrical groove of the push rod cylinder (2). The push rod (202) is slidably connected in the cylindrical groove of the push rod cylinder (2). Limiting blocks are provided at both ends of the bottom of the push rod (202). The two limiting blocks of the push rod (202) are located in the corresponding strip limiting groove of the push rod cylinder (2). A buffer (203) is fixedly connected at the top and bottom ends of the two strip limiting grooves of the push rod cylinder (2). The buffer (203) is a telescopic structure design, and a spring is provided in the middle of the buffer (203). The inner contact part of the buffer (203) is made of rubber.

2. The low-noise electric linear actuator as described in claim 1, characterized in that: A motor (101) is fixedly installed at the top front end of the transmission seat (1). The shaft of the motor (101) is sleeved on the front end of the transmission belt (102), which is located in the middle of the transmission seat (1).

3. The low-noise electric linear actuator as described in claim 1, characterized in that: The bottom position of the lead screw (103) is located inside the transmission seat (1), and the bottom position of the lead screw (103) is sleeved on the inner rear end position of the transmission belt (102).

4. The low-noise electric linear actuator as described in claim 1, characterized in that: The push rod (202) has an installation cylinder at its top and a threaded hole at its bottom, with the lead screw (103) located inside the threaded hole of the push rod (202).

5. The low-noise electric linear actuator as described in claim 1, characterized in that: A cover plate (201) is fixedly installed at the top of the push rod cylinder (2), and the upper part of the push rod (202) passes through the middle of the cover plate (201).

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