JPS6242081Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating machine that combines an electric motor and a pneumatic motor.

Rotating machines powered by electric motors will stop when there is a loss of power such as a power outage. Therefore, it is necessary to separately provide an auxiliary power mechanism for machines that need to rotate even when power is lost, and rotary machines equipped with such a mechanism have been provided in the past. However, in the conventional type, the electric motor and the separately installed auxiliary power mechanism are directly connected through a joint, which requires various accessories, which complicates the structure and increases the overall size of the device, making it difficult to manufacture and economically. There are many disadvantages in terms of construction and installation.

In view of the above-mentioned current situation, it is an object of the present invention to simplify the structure, downsize, and reduce manufacturing costs of a rotating machine that can be driven even when power is lost.

The gist of the present invention to achieve the above object is to attach a rotor to the end of the output shaft of an electric motor opposite to the side to which devices are connected, and to attach a plurality of pistons each having a roller at the tip to the rotor in a radial direction. A cylinder chamber is formed on the rear side of each piston, and a spring is installed in each piston to apply a radially outward spring force to the piston and the roller, and the roller receives the spring force of the spring. A cam that is pressed by the motor is integrally formed with the frame of the electric motor, and a rotary valve having an air intake port and an exhaust port that are connected to the cylinder chamber opened on the circumferential surface is provided in the center of the rotor. The exhaust port is connected to the atmosphere side, and the air supply port is connected to a pressure fluid supply source via a switching valve, so that when the air supply port and the cylinder chamber are connected, the pressure of the pressure fluid entering the cylinder chamber and the The cylinder chamber is configured to communicate with the exhaust port at a position where a rotational force is generated on the roller due to a drag force from the cam and the piston attempts to retract as the roller follows the cam. A rotating machine characterized by:

Hereinafter, a rotating machine according to the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 shows a half cross section of one embodiment, and FIG. 2 shows a cross section taken along the line - in FIG. A is an electric motor, 1
2 is a rotor fixed to the output shaft 1, 3 is a frame of the electric motor A, and 4 is a stator core fixed to the inside of the frame 3.
5 and 6 are integrated with the frame 3, and bearings 7,
This bracket supports the output shaft 1 via the bracket 8.

A rotor (output shaft) 9 is attached integrally to the end of the output shaft 1 of the motor A opposite to the output take-off side, i.e., the end of the output shaft 1 opposite to the side to which devices are connected. The rotor 9 has pistons 11 at the tip thereof, which rotatably support rollers 11 via roller pins 10 parallel to the output shaft 1.
A plurality of pistons 12 (six in the figure) are radially arranged and slidably fitted to each other, and a compression spring 13 is interposed between these pistons 12 and the rotor 9. A rectangular cam 16 is formed on the inner peripheral surface of a bracket 6 integral with the frame 3 of the motor A, against which the roller 11 rolls.
The bracket 6 is connected to a casing 17 in which a compressed air passage 20 having a compressed air inlet 21 is formed.

A rotary valve 14 fixed integrally with a casing 17 is fitted in the center of the rotor 9 so as to be coaxial with the output shaft 1, and a rotary valve 14 is provided on the outer peripheral surface of the rotary valve 14. A state in which four air supply ports 15 and four exhaust ports 45, which can communicate with the cylinder chamber 43 formed between the rotor 9 and the piston 12 via the communication hole 42, are alternately shifted in phase with respect to the cam 16. The air supply port 15 and the compressed air passage 20 are always in communication via a compressed air passage 19 formed in the rotary valve 14. Further, the exhaust port 45 is in communication with the atmosphere through an exhaust passage 46 formed in the rotary valve 14.

An O-ring 33 and a bearing 8 are interposed between the bracket 6 and the output shaft 1, and a bearing 18 is similarly interposed between the casing 17 and the rotor 9.
The output shaft 1 and the rotor 9 can rotate together with the piston 12 relative to the rotary valve 14, the bracket 6, and the casing 17.

One discharge side of a solenoid valve (three-way valve) 23 as a switching valve is connected to the compressed air inlet 21 connected to the air supply port 15 through a compressed air path 19 through a compressed air supply pipe 22, and the solenoid valve The other discharge port 23 is open to the atmosphere via a silencer 25. 24 is a pneumatic tank that stores pressure fluid such as air or _N2 gas, and this pneumatic tank 2
The compressed air etc. stored in the solenoid valve 23
The air pressure is supplied to the pneumatic motor B via the air pressure motor B. That is, compressed air paths 19 and 20, compressed air inlet 21, compressed air supply pipe 22, and solenoid valve 2.
3. The pneumatic tank 24 and the like constitute a pressure fluid system.

As mentioned above, in this rotating machine, the output shaft 1 of the electric motor A and the bracket 6 are shared, and the pneumatic motor B is integrated into the electric motor A.

In this rotating machine, during normal operation, electric motor A
is driven. At this time, the compressed air passages 19 and 20 of the pneumatic motor B are connected to the atmosphere by opening the solenoid valve 23, and the pneumatic motor B is idled by the rotation of the electric motor A.

In the event of a power outage or failure of the electric motor A, the solenoid valve 23 is switched and compressed air is supplied to the rotary valve 9 of the pneumatic motor B from the compressed air inlet 21. Compressed air is supplied to the cylinder chamber 4 which communicates with the air supply port 15 via compressed air passages 20 and 19.
3, and pushes the piston 12 outward in the radial direction (in FIG. 2, the dashed arrow indicates the flow of compressed air). In the state shown in FIG. 2, two pistons 12a placed back to back are pushed out. Piston 12a
When the is pushed out, the contact force between the roller 11 and the cam 16 causes the rotor 9 together with the piston 12 to rotate counterclockwise (counterclockwise) as shown by arrow a in the figure, and is connected to the rotor 9. Output shaft 1
It also rotates.

Note that, at this time, the cylinder chambers 43 of the other pistons 12 are not connected to the air supply port 44, and compressed air does not act thereon.

There are various possible ways to use such rotating machines. For example, emergency shutoff valves for pipelines are normally operated by electric motors, and in the event of a power outage, an auxiliary mechanism that combines an air cylinder and a rack and pinion is used to perform the shutoff operation. Just by changing to the corresponding rotating machine,
The valve can be operated even during a power outage, and the entire device can be made smaller. Other examples are:
If an actuator that converts the rotational motion of an electric motor into linear motion needs to be able to return to its origin in the event of a power outage, this rotating machine can be used to operate in the event of a power outage without any other special modification. be able to.

As mentioned above, according to the rotating machine according to the present invention,
Rotation can be continued even during a power outage without providing an auxiliary power mechanism outside the machine. In addition, since the structure incorporates a piston-type pneumatic motor that shares the output shaft of the electric motor and the bracket, the mechanism can be simplified, and the entire machine can be made smaller, reducing manufacturing costs. reduce Furthermore, since a piston-type pneumatic motor is used, the same torque as that of an electric motor can be obtained with approximately the same dimensions, and there is also the advantage that an increasing and decelerating mechanism is not required.

[Brief explanation of the drawing]

FIG. 1 is a half sectional view of an embodiment of a rotating machine according to the present invention, and FIG. 2 is a sectional view taken along the - line in FIG. In the drawings, A is an electric motor, B is a pneumatic motor, 1 is an output shaft, 6 is a bracket, 9 is a rotor, 11 is a roller, 12 is a piston, 13 is a spring, 14
15 is a rotary valve, 15 is an air supply port, 16 is a cam, 23 is a solenoid valve, and 24 is a pneumatic tank.

Claims (1)

[Scope of utility model registration request] A rotor is attached to the end of the output shaft of the electric motor opposite to the side to which equipment etc. are connected, and a plurality of pistons each having a roller at the tip are incorporated radially into the rotor, and a cylinder chamber is provided at the rear side of each piston. Further, a spring is assembled in each piston to apply a radially outward spring force to the piston and the roller, and a cam is integrally formed with the frame of the electric motor, and the roller is pressed by the spring force of the spring. On the other hand, a rotary valve is provided in the center of the rotor, the rotary valve having an air supply port and an exhaust port that are open on the circumferential surface that can be connected to the cylinder chamber, and the exhaust port is connected to the atmosphere side, and the air supply port is connected to the atmosphere side. is connected to a pressure fluid supply source via a switching valve, and when the air supply port and the cylinder chamber are connected, the pressure of the pressure fluid entering the cylinder chamber and the drag force from the cam cause the roller to rotate in the rotational direction. A rotating machine characterized in that the cylinder chamber is configured to communicate with the exhaust port at a position where a component force is generated and the piston attempts to contract by the roller following the cam.