CN215214991U

CN215214991U - Novel symmetrical actuator

Info

Publication number: CN215214991U
Application number: CN202021566875.5U
Authority: CN
Inventors: 张伟; 陈申建
Original assignee: Taizhou Zhouhao Valve Technology Co ltd
Current assignee: Taizhou Zhouhao Valve Technology Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-12-17
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a novel executor of symmetry, including the casing, the stroke control group to and set up motor and the drive gear group of setting inside the casing on the casing. The shell comprises an upper metal plate, a lower metal plate and a plastic sealing frame for connecting the upper metal plate and the lower metal plate. The edge of the shell is provided with a plurality of symmetrically distributed fixing holes which penetrate through the upper metal plate and the lower metal plate. The transmission gear set comprises a driving gear, an output gear and a plurality of transmission gears. The driving gear is connected with a motor driving shaft, and the lower end of the output gear is connected with an output shaft. The position of the output shaft is symmetrical to the fixing hole. The utility model discloses the executor shell adopts metal and plastics compound mode, has greatly alleviateed the weight of current executor, has compact structure, light in weight, small advantage.

Description

Novel symmetrical actuator

Technical Field

The invention relates to the field of actuating mechanisms, in particular to a novel symmetrical electric actuator.

Background

Process control systems are platforms for automating production processes, in which actuators serve as essential parts. The device is used for receiving a control signal sent by a controller and changing the size of a controlled medium, so that a controlled variable is maintained at a required value or in a certain range, and the device is applied to multiple fields of petroleum, chemical engineering, metallurgy, light industry, power stations, refrigeration and the like. Common actuators can be divided into electric actuators, hydraulic actuators and pneumatic actuators according to driving energy, and in industrial production application, electric actuators are more widely used than pneumatic actuators and hydraulic actuators.

The electric actuator is a valve driving device commonly used in an industrial automatic control system. The electric actuator is used for connecting the valve body, usually takes a motor as a driving source, takes direct current as a control and feedback signal, and acts according to the signal size proportion after a superior instrument or a computer sends out a control signal, so that the valve or the air door is opened to a corresponding opening degree through the output shaft. The electric actuator has the advantages of convenient energy source taking, sensitive action and high signal transmission speed, and is suitable for remote signal transmission.

The shell of the electric actuator sold on the market at present is mostly made of metal, has large volume and light weight, and is more suitable for high-pressure large-caliber valves. However, as the automation industry develops, some compact valves are produced, and at this time, a light-weight and compact electric actuator is needed to match the existing requirements.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve the above technical problems in the related art at least to some extent. Therefore, the utility model provides a novel symmetrical actuator with light weight, compact structure and small volume.

The utility model discloses a novel executor of symmetry, including casing, motor, drive gear group and stroke control group. The method is characterized in that: the shell comprises an upper metal plate, a lower metal plate and a plastic sealing frame for connecting the upper metal plate and the lower metal plate. The middle plastic edge sealing sleeve is used for replacing the prior metal shell, so that the weight of the actuator is greatly reduced, and the overall thickness is also reduced.

The edge of the shell is provided with at least four fixing holes which are symmetrically distributed, the fixing holes penetrate through the upper metal plate and the lower metal plate and are matched with the fastening device to play a role in fixing the valve.

The transmission gear set is positioned in the shell and comprises a driving gear, an output gear and a plurality of transmission gears. The upper and lower metal plates are respectively provided with an opening. The driving gear is connected with the motor through the opening of the upper metal plate, the lower end of the output gear is connected with the output shaft, and the output shaft is fixed in the opening of the lower metal plate. Therefore, the motor can drive the output shaft to rotate through the transmission gear set.

The output shaft is located the horizontal symmetry axis of fixed orifices, improves the stability of transmission.

The stroke control group comprises two microswitches electrically connected with the motor and a cam positioned on the output gear surface, and is used for cutting off a motor loop when the actuator is at two extreme positions, namely a starting end and a terminal end, so that the terminal end is electrically limited.

According to the utility model discloses an example, drive gear group contains six mesh drive's drive gear in proper order, is first drive gear respectively, second drive gear, third drive gear, fourth drive gear, fifth drive gear and sixth drive gear, and wherein first drive gear meshes with the driving gear mutually, and sixth drive gear meshes with output gear mutually.

According to the utility model discloses an example, it has one section curved spacing groove to go up the metal sheet, and two micro-gap switches are located curved both ends respectively, and the cam can be along with output gear's rotation at the spacing inslot rotation, triggers micro-gap switch.

According to an example of the present invention, the output shaft length is flush with the lower metal plate.

According to an example of the utility model, be provided with the output axle sleeve between output gear and the output shaft, fix the output shaft wherein.

To sum up, the utility model discloses following beneficial effect has: the shell adopts metal and plastics compound mode, under the prerequisite that satisfies the production requirement, provides a more light and handy selection, from the commodity circulation to the use, has all greatly reduced user's physical output. And the whole thickness is thinner and the volume is smaller while the same strength is provided. Utilize multi-stage drive gear, can carry out multiple combination according to the required torsion of valve, satisfy the user demand of different scenes.

Drawings

Fig. 1 is a schematic view of the overall structure of the actuator of the present invention;

fig. 2 is a front view of the actuator of the present invention;

fig. 3 is a schematic structural diagram of a transmission gear set in the actuator of the present invention;

fig. 4 is a second schematic structural view of a transmission gear set in the actuator of the present invention;

fig. 5 is a rear view of the actuator of the present invention.

Reference numerals: 1. a housing; 111. an upper metal plate; 112. a lower metal plate; 113. a plastic frame sealing frame; 2. a motor; 3. a fixing hole; 411. a microswitch; 412. a cam; 413. a limiting groove; 511. a driving gear; 512. an output gear; 513. a first drive gear; 514. a second transmission gear; 515. a third transmission gear; 516. a fourth transmission gear; 517. a fifth transmission gear; 518. a sixth transmission gear; 6. an output shaft; 7. an output shaft sleeve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The novel symmetrical actuator shown in fig. 1-5 comprises a housing 1, wherein the housing 1 is a cuboid, and one long edge of the housing is provided with two chamfers. The housing 1 may be further divided into an upper metal plate 111, a lower metal plate 112 and a plastic frame 113 connecting the upper and lower metal plates. The upper metal plate and the lower metal plate are detachably connected with the plastic sealing frame, and any one of threaded connection, key connection and pin connection can be selected. The upper and lower metal plates and the plastic sealing frame can also be fixedly connected.

A fixing hole 3 is drilled at each of four corners of the housing 1, and the fixing hole 3 penetrates the upper and lower metal plates and can be used in cooperation with a fastening device, such as a bolt, for connecting a valve.

The motor 2 is mounted on the outer portion of the housing 1, i.e., the upper metal plate 111, and provides a power source for the entire actuator.

The interior of the housing 1 is provided with a transmission gear set, which comprises a driving gear 511, an output gear 512 and six transmission gears, namely a first transmission gear 513, a second transmission gear 514, a third transmission gear 515, a fourth transmission gear 516, a fifth transmission gear 517 and a sixth transmission gear 518, the large diameter part of the first transmission gear 513 is meshed with the driving gear 511, the large diameter part of the second transmission gear 514 is meshed with the small diameter part of the first transmission gear 513, the large diameter part of the third transmission gear 515 is meshed with the small diameter part of the second transmission gear 514, the large diameter part of the fourth transmission gear 516 is meshed with the small diameter part of the third transmission gear 515, the large diameter part of the fifth transmission gear 517 is meshed with the small diameter part of the fourth transmission gear 516, the large diameter part of the sixth transmission gear 518 is meshed with the small diameter part of the fifth transmission gear 517, and the small diameter part of the sixth transmission gear 518 is meshed with the output gear.

The upper and lower metal plates are respectively provided with an opening through which the driving gear 511 is connected to a motor driving shaft (not shown). The lower end of the output gear 512 is connected with an output shaft 6, the output shaft 6 is fixed in the opening of the lower metal plate, and the length of the output shaft is flush with that of the lower metal plate. Therefore, by means of power transmission of the transmission gear set, the motor 2 can finally drive the output shaft 6 to further drive the valve to be opened or closed.

The output shaft is positioned on the central line of the two long edges and is symmetrical to the fixed hole, so that the output stability can be improved. An output shaft sleeve 7 can be additionally arranged between the output gear and the output shaft to fix the output shaft in the output shaft sleeve, so that the stability is further improved.

Through the drive of executor, the valve can switch between opening and closing, consequently also need provide the feedback when the relevant position to in time close motor 2, avoid the condition of motor 2 excessive output to take place. Thus, the actuator also includes the stroke control group, including two microswitches 411 and a cam 412 on the output gear face. Go up the metal sheet and open and have a section curved spacing groove 413, two micro-gap switch 411 are located curved both ends respectively, and cam 412 can be along with output gear's rotation at the spacing inslot rotation, and then trigger micro-gap switch 811, send corresponding signal.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a novel executor of symmetry, includes casing (1), stroke control group to and set up at the outside motor (2) of casing and set up at the inside transmission gear group of casing, its characterized in that:

the shell comprises an upper metal plate (111), a lower metal plate (112) and a plastic frame (113) connecting the upper metal plate and the lower metal plate,

the edge of the shell is provided with at least four fixing holes (3) which are symmetrically distributed and penetrate through an upper metal plate and a lower metal plate, the transmission gear group comprises a driving gear (511), an output gear (512) and a plurality of transmission gears, the upper metal plate and the lower metal plate are respectively provided with an opening, the driving gear (511) is connected with a motor driving shaft through the opening of the upper metal plate, the lower end of the output gear (512) is connected with an output shaft (6), the output shaft (6) is fixed in the opening of the lower metal plate,

the output shaft (6) is positioned on the longitudinal symmetrical axis of the fixing hole,

the stroke control group comprises two microswitches (411) electrically connected with the motor and a cam (412) positioned on the surface of the output gear.

2. The symmetrical novel actuator of claim 1, wherein: the transmission gear set comprises six transmission gears which are sequentially meshed for transmission, namely a first transmission gear (513), a second transmission gear (514), a third transmission gear (515), a fourth transmission gear (516), a fifth transmission gear (517) and a sixth transmission gear (518), wherein the first transmission gear (513) is meshed with the driving gear (511), and the sixth transmission gear (518) is meshed with the output gear (512).

3. The symmetrical novel actuator of claim 1, wherein: the upper metal plate is provided with a section of arc-shaped limiting groove (413), the two micro switches (411) are respectively positioned at two ends of the arc, and the cam (412) can rotate in the limiting groove along with the rotation of the output gear to trigger the micro switches.

4. The symmetrical novel actuator of claim 1, wherein: the length of the output shaft (6) is flush with the lower metal plate (112).

5. The symmetrical novel actuator of claim 1, wherein: an output shaft sleeve (7) is arranged between the output gear (512) and the output shaft (6) and fixes the output shaft therein.