JPH04355644A - Driving apparatus - Google Patents

Abstract

PURPOSE:To reduce the size of an actuator by a method wherein the one side ends of the rotary shafts of two through-shaft motors whose rotary shafts are in parallel with each other are linked with each other by a linking plate and the one motor is driven to move the rotary shafts to a required position and then the rotation and movement of the other motor is started. CONSTITUTION:Two through-shaft motors 3 and 17 are attached to a fixing unit 1 in parallel with each other with screws 20 and 29. The one side ends of the rotary shafts 25 and 9 of the motors 3 and 17 are linked with each other by linking plates 27 and 38. The other end of the rotary shaft 25 is supported by a rotary nut 23. A rotor 4 is placed around the stator 21 of the motor 3 with bearings 22 and 22 therebetween so as to rotate freely. If the motor 3 is made to rotate, the rotary shaft 25 is moved to a direction of an arrow A with the screws on the shaft 25 and the rotary nut 23 and the rotary shaft 9 of the motor 17 is moved to the same direction accordingly. If the motor 3 is stopped at a required position and then the motor 17 is driven, the rotor 32 of the motor 17 is made to rotate with bearings 31, 31 and 37 therebetween and the rotary shaft 9 is moved and made to rotate by a spline 14. With this constitution, the size of an actuator can be reduced.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a drive device, and in particular,
The present invention relates to a novel improvement for downsizing by using an inner diameter penetrating motor to rotate a rotating shaft at an arbitrary stroke position with a downsized configuration.

0002

2. Description of the Related Art There are various types of drive devices of this kind that have been used in the past, and a typical one is one shown in FIG. 2, for example. That is, what is indicated by the reference numeral 1 in FIG. 2 is a fixed body, and a first support plate 2 of this fixed body 1 is provided with a shaft-shaped motor 3. Rotating shaft 4 of the motor 3
is rotatably provided on a second support plate 5 provided on the fixed body 1 via a bearing 6, and a cam follower 8 provided on the rotating shaft 4 via a cam plate 7 is attached to the second support plate 5 provided on the fixed body 1. The shaft body 9 is engaged with a cam body 10 provided through a bearing 11 at one end 9a of a shaft body 9 passing through the shaft body 1. The locking portion 10a of the cam body 10 is configured to slide in engagement with a groove 12a of a guide portion 12 provided at the upper end of the fixed body 1. A member 13 is provided at the other end 9b of the shaft body 9, and a spline portion 14 is formed.
A motor 17 is connected via 6. Therefore, when the motor 3 is rotated and the cam follower 8 is oscillated, the cam body 10 moves in the direction of arrow A, and at the same time, the shaft body 9 also moves in the same direction. When the shaft 9 is stopped at an arbitrary stroke position and the motor 17 is rotated, the shaft 9 rotates at that position and can operate as an actuator.

0003

[Problems to be Solved by the Invention] Since the conventional drive device was constructed as described above, the following problems existed. That is, since the motor 17 for rotating the shaft body 9 was provided apart from the shaft body 9, the overall configuration was increased in size, and it was extremely difficult to meet the need for miniaturization.

The present invention has been made to solve the above-mentioned problems. In particular, by using an inner diameter penetrating motor, a rotary shaft can be rotated at an arbitrary stroke position with a compact configuration, and The purpose of the present invention is to provide a compact drive device.

[0005]

[Means for Solving the Problems] A drive device according to the present invention has a first inner diameter penetrating motor provided on a fixed body, and a rotary nut of the first inner diameter penetrating motor is screwed together to be movable in the axial direction. a screw shaft provided, a first connection plate connected to one end of the screw shaft and located outside the fixed body, and a second connecting plate arranged in parallel adjacent to the first inner diameter penetrating motor on the fixed body. an inner diameter penetrating motor; a rotating shaft passing through the second inner diameter penetrating motor and having a spline portion; a nut portion provided on a rotor of the second inner diameter penetrating motor and engaging with the spline portion; and the rotating shaft. a second connection plate provided at one end via a bearing and fixed to the first connection plate, and the rotation shaft is configured to move in the axial direction, and the rotating shaft rotates at an arbitrary axial position.

[0006]

[Operation] In the drive device according to the present invention, first, the first
When the inner diameter penetrating motor is operated and the rotary nut is rotated, the screw shaft is sent in the axial direction, so that the rotating shaft of the second inner diameter penetrating motor is simultaneously moved in the axial direction via the first and second connection plates. . By this axial movement of the rotary shaft, when the rotary shaft reaches a predetermined axial position, the operation of the first inner diameter penetrating motor is stopped and the second inner diameter penetrating motor is activated, and the rotary shaft is moved to that position. Rotate with. Therefore, by connecting the rotating body to the rotating shaft, the rotating shaft can function as an actuator that moves and rotates in the axial direction.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the drive device according to the present invention will be described in detail below with reference to the drawings. Note that the same or equivalent parts as in the conventional example will be described with the same reference numerals. FIG. 1 is a sectional view showing a drive device according to the present invention.

In the figure, reference numeral 1 indicates a plate-shaped fixed body, and a first inner diameter penetrating motor 3, such as an outer rotor type, is provided on this fixed body 1 via a mounting screw 20. As shown in FIG.

A first rotor 4 is rotatably provided on the outer periphery of the first cylindrical stator 21 of the first inner diameter penetrating motor 3 via a pair of bearings 22. A rotating nut 23 is fixed with a mounting screw 24.

A threaded shaft 25 having a threaded portion 25a on its outer periphery is provided in the hollow portion 21a of the cylindrical stator 21, and this threaded portion 25a is screwed into the rotating nut 23.

The end portion 25b of the screw shaft 25 is connected to a bearing 26.
A first connecting body 27 located outside the fixed body 1 is provided at this end portion 25b via a mounting screw 28.

At the inside of the fixed body 1, a second inner diameter penetrating motor 17 having an outer rotor type structure is arranged adjacent to the first inner diameter penetrating motor 3, and each motor 3, 17 are provided parallel to each other, and
The motor 17 is installed via a mounting screw 29.

A second cylindrical stator 30 of the second inner diameter penetrating motor 17 is provided with a second cylindrical stator 30 via a pair of bearings 31 on the outer periphery of the second cylindrical stator 30.
A rotor 32 is rotatably provided, and this second rotor 32
A nut portion 33 is attached to the end of the connecting disk 33a and the mounting screw 3.
4 and 35.

Hollow portion 30a of the second cylindrical stator 30
A rotating shaft 9 having a spline portion 14 is provided therein, and the rotating shaft 9 and the nut portion 33 are engaged with each other through the spline portion 14 so as to rotate together, and are axially movable relative to each other. It is configured so that it can be done.

One end 9a of the rotating shaft 9 is connected to the fixed body 1.
A second connecting body 38 is provided at one end 9a through a bearing 37, and this second connecting body 38 is connected to the first connecting plate 27 via a bearing 36. It is fixed to via a fixing plate 39 and fixing screws 40.

In the above configuration, first, when the first inner diameter penetrating motor is operated to rotate the rotary nut 23,
Since the screw shaft 25 is sent in the axial direction, the rotating shaft 9 of the second inner diameter penetrating motor 17 is simultaneously moved in the axial direction via the first and second connecting plates 27 and 38.

By this axial movement of the rotating shaft 9, when the rotating shaft 9 reaches a predetermined axial position, the operation of the first inner diameter penetrating motor 3 is stopped, and the second inner diameter penetrating motor 17 is activated. , rotation state 9 rotates at that position.

Therefore, a rotated body (not shown) is attached to the rotating shaft 9.
By connecting the rotary shaft 9, the rotating shaft 9 can function as an actuator that moves and rotates in the axial direction.

Note that the inner diameter penetrating motors 3, 17 are as follows:
Other types of motors can also be used as long as they have a hollow inner diameter, such as an outer rotor type motor.

[0020]

Since the drive device according to the present invention is constructed as described above, the following effects can be obtained. That is, a pair of inner diameter penetrating motors can be arranged in parallel on the same fixed body, and the size can be significantly reduced compared to the conventional configuration. Furthermore, since it is an inner diameter penetrating type motor, a belt or the like is not required, and reliability can be greatly improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a drive device according to the invention.

FIG. 2 is a sectional view showing a conventional drive device.

[Explanation of symbols]

1 Fixed body 3. First inner diameter through-type motor 9 Rotation axis 14 Spline part 17　　　　　　2nd inner diameter through type motor 23 Rotating nut 25 Screw shaft 25b One end 27 First connection plate 32 Rotor 33 Nut part 37 Bearing 38 Second connection plate

Claims (1)

[Claims] 1. A first inner diameter penetrating motor (3) provided on a fixed body (1), and the first inner diameter penetrating motor (3).
a screw shaft (25) that is screwed into a rotating nut (23) and is movable in the axial direction, and one end of the screw shaft (25) (
25b) and located outside the fixed body (1); and a first connecting plate (27) connected to the fixed body (1) and arranged in parallel adjacent to the first inner diameter penetrating motor (3). a second inner diameter penetrating motor (17); and a second inner diameter penetrating motor (17);
7) and has a spline portion (14).
) and the rotor (3) of the second inner diameter penetrating motor (17).
2) and engages with the spline part (14); and a nut part (33) provided on one end (9a) of the rotating shaft (9) via a bearing (37) and the first connecting plate (27). )
and a second connecting plate (38) fixed to the rotary shaft (9) through the respective connecting plates (27, 38) that move in conjunction with the axial movement of the screw shaft (25). A drive device characterized in that the rotating shaft (9) is configured to move in an axial direction and rotate at an arbitrary axial position.