High-precision electric push rod with waterproof performance

Abstract

The utility model discloses a high-precision electric push rod with waterproof performance. The high-precision electric push rod comprises a driving motor, a transmission assembly, a supporting seat, a transmission lead screw, a sliding nut, a telescopic inner pipe and an outer sleeve. A potentiometer and a travel switch which are used for realizing precise travel control are also arranged in the supporting seat so as to obtain travel data of the driving motor; the supporting base is composed of a supporting middle plate, an electric appliance upper base, an electric appliance cover plate and a motor cavity shell. And a sealing rubber ring is arranged between the connecting positions of the supporting middle plate, the electric appliance upper seat, the electric appliance cover plate and the motor cavity shell, so that the waterproof performance between the connecting positions is improved. Compared with a traditional electric push rod structure, the telescopic pipe can be controlled within a specific stroke through a potentiometer and a travel switch structure, and the effect of precise reciprocating work is achieved; compared with a traditional position sensor control mode, the whole structure is effectively simplified, the control precision and the flexibility of control work are better, and the use requirements of the industry can be better met.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric push rods and relates to a high-precision electric push rod with waterproof performance. Background Art

[0002] At present, electric linear actuators are a widely used driving technology, for example, in automation equipment, automatic lifting platforms, massage chairs and other products; however, the electric linear actuator structure in the existing technology mainly realizes the reciprocating working control of the telescopic tube by arranging position sensors at both ends of the stroke during operation. This control method is relatively cumbersome and has low control accuracy, which cannot meet the requirements of some high-precision reciprocating usage scenarios. Utility Model Content

[0003] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0004] A high-precision electric push rod with waterproof performance, comprising: a drive motor, a transmission assembly, a support seat, a transmission screw, a sliding nut, a telescopic inner tube and an outer sleeve;

[0005] The drive motor, transmission assembly and transmission screw are arranged in the support seat, and the drive motor realizes transmission cooperation with the transmission screw through the transmission assembly;

[0006] The outer sleeve is located at the lower end of the support seat, and the threaded section of the transmission screw extends into the outer sleeve. The sliding nut is nested on the threaded section of the transmission screw, and the outer sleeve is used to realize the rotation limit of the sliding nut.

[0007] The telescopic inner tube is arranged in the outer tube, and the end of the telescopic inner tube passes through the outer tube and is provided with a connection portion for connecting to an external driven structure; the telescopic inner tube is matched with the transmission screw through a sliding nut; the upper and lower ends of the outer tube are provided with waterproof sleeves;

[0008] The support seat is also provided with a potentiometer and a travel switch for realizing precise control of the stroke. The potentiometer and the travel switch realize transmission cooperation with the drive motor through the transmission assembly to obtain the stroke data of the drive motor.

[0009] The support base is composed of: a supporting middle plate, an electrical upper base, an electrical cover plate and a motor cavity shell; and a sealing rubber ring is provided between the connection positions where the supporting middle plate, the electrical upper base, the electrical cover plate and the motor cavity shell are connected to improve the waterproof performance between the connection positions.

[0010] As a further solution of the present invention: the transmission assembly includes: a transmission worm installed on the output shaft of the driving motor, a main gear nested on the transmission screw, and a transmission helical gear arranged between the transmission worm and the main gear. The transmission coordination between the driving motor and the transmission screw is realized through the transmission worm, the transmission helical gear and the main gear.

[0011] As a further solution of the present invention: a reduction gear set is further provided between the potentiometer, the travel switch and the transmission assembly.

[0012] As a further solution of the present invention: the travel switch adopts a cam travel switch structure, the overall structural control structure is more stable, and can operate smoothly in a high vibration environment of the drive motor.

[0013] The beneficial effects of the utility model are as follows: compared with the traditional electric push rod structure, the potentiometer and the travel switch structure can control the telescopic tube within a specific stroke to achieve the effect of precise reciprocating work; compared with the traditional position sensor control method, the overall structure is effectively simplified, the control accuracy and the flexibility of the control work are better, and it can better meet the use needs of the industry;

[0014] The outer shell structure is designed with a waterproof structure, which can effectively prevent water from invading the structure during use and causing damage to the transmission components, drive motor and other structures, thereby improving the stability and service life of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the utility model.

[0016] Figure 2 This is another structural diagram of the utility model.

[0017] Figure 3 It is a structural diagram of the transmission component in the utility model.

[0018] Figure 4 It is a structural diagram of the transmission screw in the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. It should be understood that this application is not limited to the example embodiments disclosed herein. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0022] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] See also Figures 1 to 4 In the embodiment of the utility model, a high-precision electric push rod with waterproof performance includes: a driving motor 2, a transmission assembly 5, a support base 1, a transmission screw 10, a sliding nut 9, a telescopic inner tube 4 and an outer sleeve 41;

[0024] The drive motor 2, the transmission assembly 5 and the transmission screw 10 are arranged in the support base 1, and the drive motor 2 realizes transmission cooperation with the transmission screw 10 through the transmission assembly 5;

[0025] The outer sleeve 41 is located at the lower end of the support base 1, and the threaded section of the transmission screw 10 extends into the outer sleeve 41. The sliding nut 9 is nested on the threaded section of the transmission screw 10, and the outer sleeve 41 is used to realize the rotation limit of the sliding nut 9.

[0026] The telescopic inner tube 4 is disposed in the outer sleeve 41, and the distal end of the telescopic inner tube 4 passes through the outer sleeve 41 and is provided with a connecting portion 41 for connecting to an external driven structure; the telescopic inner tube 4 is mated with the transmission screw 10 via a sliding nut 9;

[0027] The upper and lower ends of the outer sleeve 41 are provided with waterproof sleeves 31. The upper waterproof sleeve 31 is used to improve the connection sealing between the outer sleeve 41 and the support base 1, and the lower waterproof sleeve 31 is used to improve the connection sealing between the outer sleeve 41 and the telescopic inner tube 4, so as to improve the overall waterproof performance of the outer sleeve 41 structure.

[0028] The support base 1 is also provided with a potentiometer 6 and a travel switch 7 for achieving precise stroke control. The potentiometer 6 and the travel switch 7 are coupled with the drive motor 2 through the transmission assembly 5 to obtain the stroke data of the drive motor 2.

[0029] The potentiometer 6 accurately obtains the current working stroke value of the drive motor 2 and provides accurate feedback to the outside, so that the operator can achieve the effect of accurate stroke control based on the value; the limit switch 7 is used to limit the position or stroke of the drive motor 2, so that the drive motor 2 automatically stops, reverses, changes speed, or automatically moves back and forth at a certain position or stroke;

[0030] The support base 1 is composed of: a supporting middle plate 15, an electrical upper base 13, an electrical cover 11 and a motor cavity shell 16; and a sealing rubber ring 14 is provided between the connection positions where the supporting middle plate 15, the electrical upper base 13, the electrical cover 11 and the motor cavity shell 16 are connected, so as to improve the waterproof performance between the connection positions; the waterproof structure of the outer sleeve 41 can achieve the waterproof effect of the push rod structure, prevent water from invading the internal transmission structure and circuit structure, and cause damage to the transmission component 5, the drive motor 2 and other structures, thereby improving the stability and service life of the structure.

[0031] Among them, the transmission assembly 5, the transmission screw 10, the potentiometer 6 and the limit switch 7 are installed on the supporting middle plate 15, and the electrical part (terminal structure) in the push rod structure is installed in the electrical cavity 12 of the electrical upper seat 13, and the electrical cover 11 covers the electrical cavity 12 to achieve protective sealing.

[0032] Furthermore, the transmission assembly 5 includes: a transmission worm 53 installed on the output shaft of the drive motor 2, a main gear 51 nested on the transmission screw 10, and a transmission bevel gear 52 arranged between the transmission worm 53 and the main gear 51. The transmission coordination between the drive motor 2 and the transmission screw 10 is realized through the transmission worm 53, the transmission bevel gear 52 and the main gear 51.

[0033] Furthermore, a reduction gear set 8 is provided between the potentiometer 6, the travel switch 7 and the transmission assembly 5, and the reduction gear set 8 is used to achieve a transmission ratio reduction effect, thereby achieving accurate data acquisition and control.

[0034] Furthermore, the travel switch 7 adopts a cam travel switch 7 structure, and the overall structural control structure is more stable, and can operate smoothly in the high vibration environment of the drive motor 2; and when used in conjunction with the reduction gear set 8, it can realize that the trigger stroke of one circle of the cam structure corresponds to a moving stroke of the telescopic inner tube 4, thereby achieving the effect of precise stroke control.

[0035] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0036] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-precision electric linear actuator with waterproof performance, characterized in that: include: Drive motor, transmission assembly, support base, transmission screw, sliding nut, telescopic inner tube and outer tube; The drive motor, transmission assembly and transmission screw are arranged in the support seat, and the drive motor realizes transmission cooperation with the transmission screw through the transmission assembly; The outer sleeve is located at the lower end of the support seat, and the threaded section of the transmission screw extends into the outer sleeve. The sliding nut is nested on the threaded section of the transmission screw, and the outer sleeve is used to realize the rotation limit of the sliding nut. The telescopic inner tube is arranged in the outer tube, and the end of the telescopic inner tube passes through the outer tube and is provided with a connection portion for connecting to an external driven structure; the telescopic inner tube is matched with the transmission screw through a sliding nut; the upper and lower ends of the outer tube are provided with waterproof sleeves; The support seat is also provided with a potentiometer and a travel switch for realizing precise control of the stroke. The potentiometer and the travel switch realize transmission cooperation with the drive motor through the transmission assembly to obtain the stroke data of the drive motor. The support base is composed of: a supporting middle plate, an electrical upper base, an electrical cover plate and a motor cavity shell; and a sealing rubber ring is provided between the connection positions where the supporting middle plate, the electrical upper base, the electrical cover plate and the motor cavity shell are connected to improve the waterproof performance between the connection positions.

2. The high-precision electric linear actuator with waterproof performance according to claim 1, characterized in that: The transmission assembly includes: a transmission worm mounted on the output shaft of the drive motor, a main gear nested on the transmission screw, and a transmission helical gear arranged between the transmission worm and the main gear. The transmission coordination between the drive motor and the transmission screw is achieved through the transmission worm, the transmission helical gear and the main gear.

3. A high-precision electric linear actuator with waterproof performance according to any one of claims 1 or 2, characterized in that: A reduction gear set is also provided between the potentiometer, the travel switch and the transmission assembly.

4. The high-precision electric linear actuator with waterproof performance according to claim 3, characterized in that: The travel switch adopts a cam travel switch structure.

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