JPS638343B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has two output shafts arranged concentrically on one side, and while rotating one output shaft in a fixed direction, rotates the other output shaft in the same direction as said one output shaft or This invention relates to an electric motor with two output shafts on one side that can freely switch and rotate in either of the opposite directions.

As is well known, an electric motor is a single output shaft prime mover whose output shaft is a shaft integrated with a rotor, and one electric motor does not output two types of output at the same time.

On the other hand, electric motors are used as prime movers for factories, electric trains, electric locomotives, diesel cars, electric vehicles, etc., prime movers for various cargo handling machinery, copiers, etc.
From office automation machinery, various automatic devices, medical equipment, to toys, the list is almost limitless.

In this way, electric motors, which were indispensable in supporting industry, economy, and culture in the 20th century, have a single output shaft as mentioned earlier, so it is impossible to obtain two outputs at the same time with just one electric motor. If two outputs are required, two electric motors are used, but two transmission members must be attached to the main shaft that is rotated by the electric motor, and two outputs must be obtained via these two transmission members. Regardless of the size of the electric motor, a certain amount of attached equipment is required, and it may not be possible to install it inside a device with limited installation space. In the case of equipment that needs to obtain a different rotating torque that can be switched in two reverse directions, it is necessary to use two electric motors as mentioned above or to install complicated accessory equipment to switch the power system. It didn't happen.

Based on the above-mentioned viewpoints, this invention has two output shafts arranged concentrically on one side, enables output of two systems at the same time, and furthermore, allows the rotation direction of one of the systems to be switched between forward and reverse. The present invention provides an electric motor having an output generating section, a reduction section integrated with the output generation section, a driving gear fixed to a main shaft protruding forward from the reduction section, and meshing with the driving gear. an electromagnetic clutch unit which has a first driven gear and is built into a cylindrical housing and is attached to the reduction section and is capable of forward and reverse rotation; the electromagnetic clutch unit is rotated integrally with the first driven gear; a first output shaft; a second driven gear rotatably supported on the first output shaft;
A predetermined number of intermediate gears meshing and transmitting the driven gear and the driving gear, a tubular second output shaft arranged concentrically with the first output shaft, and the first output shaft and the second output shaft can freely rotate together. a forward rotation coupling means that can be freely switched and driven to rotate the second driven gear and a reverse rotation coupling means that can be switched and driven to freely rotate the second driven gear and the second output shaft, and one end of the first output shaft. A through hole is provided in a side wall portion of the cylindrical housing formed to support the first gear so as to rotate freely, and the electromagnetic clutch unit is attached to the reduction part, so that the driving gear is inserted through the through hole and the first gear is inserted into the first gear. It is characterized in that it is meshed and connected to the driven gear and the intermediate gear.

Next, the electric motor of the present invention will be explained by way of embodiments with reference to the drawings.

FIG. 1 shows an embodiment of the electric motor of the present invention in a partially cutaway side view. As shown in the drawings, the electric motor of the present invention includes an electromagnetic clutch unit C that is capable of forward and reverse rotation and is built into a cylindrical housing 1 on the front surface of a reduction unit B that is integrated with an output generation unit A.
is fixed.

The output generating section A is a driving section with a rotor (not shown) installed in the stator, and its output is transmitted to the reducing section B.
The rotation is reduced at a predetermined reduction ratio and is transmitted to the main shaft 2 protruding from the front surface of the reduction unit B.

The main shaft 2 protrudes to an eccentric position in front of the reduction section B, and has a driving gear 3 fixed thereto.

The driving gear 3 is inserted through a through hole 1B formed in a side wall 1A of the housing 1 of the electromagnetic clutch unit C, and is fixed to a first output shaft 4 rotatably supported at the axial center of the side wall 1A. 1 driven gear 5 and a first intermediate gear 24, which will be described later.

Next, to explain the electromagnetic clutch unit C,
The driving gear 3 and the first driven gear 5 have the same diameter and the same number of teeth,
One end of the first output shaft 4 passes through a cover plate 6 fixed to the front surface of the housing 1 and projects to the outside.

On the other hand, a boss member 7 is fitted in a serration to the intermediate portion of the first output shaft 4 in the longitudinal direction and is fixed integrally therewith.

A first armature 8 that rotates integrally with the boss member and is movable in the axial direction is spline-fitted to the boss member 7.

The first armature 8 has a permanent magnetic material 9 fixed to its entire back surface, and has a first rotor integrated with a tubular second output shaft 11 that is supported concentrically on the first output shaft 4 via a bearing 10. The magnetic adsorption to 12 is freely possible and they are placed directly facing each other.

The first rotor 12 faces a first field core 13 fixed in the housing 1 with a small distance therebetween, and supports a boss portion 12A in a center hole 13A of the first field core 13 via a bearing 14. A bearing metal 15 is interposed between the boss portion 12A and the first output shaft 4.

Further, the boss member 7 supports a second armature 16 such that it can freely rotate and slide in the axial direction.

The second armature 16 has a spline-like unevenness 17 on its outer circumference, and a crown-like unevenness 18 formed at the tip of the peripheral wall portion 12B of the first rotor 12 is engaged with the unevenness 17 so as to be movable in the axial direction. .

The second armature 16 is capable of magnetic attraction to a second rotor 21 supported on the first output shaft 4 through a bearing 19 and a bearing metal 20 so as to freely rotate.

The second rotor 21 faces the front surface of the second field core 22 fixed in the housing 1 with a small distance apart, and the boss portion 21A has a second driven gear 23.
are fixed concentrically.

As shown in the front view of the gear train in FIG. 2, the second driven gear 23 includes a second intermediate gear 26 fixed to a shaft 25 of a first intermediate gear 24 that meshes with the driving gear 3.
It is meshed with.

In this embodiment, the first intermediate gear 24 is the driving gear 3.
The second intermediate gear 26 has the same diameter and the same number of teeth as the second driven gear 23.

The first field core 13 includes an electromagnetic coil 2.
Further, each of the second field cores 22 has a built-in electromagnetic coil 28, and a voltage can be applied to each electromagnetic coil by a signal from an external control mechanism (not shown).

The first armature 8, the first rotor 12, and the first field core 13 are an example of a forward rotation connecting means that can be freely switched and driven so that the first output shaft 4 and the second output shaft 11 can freely rotate together. The second armature 16, the second rotor 21, and the first rotor 12 are an example of a reversing coupling means that can be switched and driven so that the second driven gear 23 and the second output shaft 11 can freely rotate together.

Further, in this embodiment, the second output shaft 11 is shaped like a hub so that a pulley, gear, tube shaft, or other transmission member (not shown) can be fixed to it. There is freedom in the design, such as doing so.

Since the electric motor of the present invention has the above-described configuration, when the main shaft 2 of the reduction unit B is reduced in speed and rotated at a predetermined reduction ratio due to the activation of the output generation unit A, the first driven gear 5 meshing with the driving gear 3 First intermediate gear 24
rotates, and the first output shaft 4 to which the first driven gear 5 is fixed rotates.

On the other hand, the second driven gear 23 meshing with the second intermediate gear 26 fixed on the shaft 25 of the first intermediate gear 24 also rotates at the same time, but the rotation direction of the second driven gear 23 is The rotation direction of the first output shaft 4 is opposite to that of the first output shaft 4 because of its meshing with the driving gear 3 .

At this time, if no voltage is applied to either of the electromagnetic coils 27 and 28, the first armature 8, which rotates together with the first output shaft 4, is separated from the first rotor 12 due to the action of the permanent magnet 9. 1st
It does not transmit torque to the rotor 12 and similarly
Since there is no coupling relationship between the second rotor 21, which is integral with the driven gear 23, and the first rotor 12, only the first output shaft 4 rotates, and the second output shaft 11 remains stationary. That is, the first output shaft 4 outputs, but the second output shaft 11 does not output.

Next, when voltage is applied to the electromagnetic coil 27,
Magnetic flux flows from the first field core 13 to the first rotor 1
2. Passes through the first armature 8, and the first armature 8 is magnetically attracted to the first rotor 12.

Since the first armature 8 is a member that rotates together with the first output shaft 4, the second output shaft 11 rotates together with the first output shaft 4, in the same direction and at the same rotation speed as the first output shaft 4. It will also be output from the second output shaft 11.

Next, when the voltage application to the electromagnetic coil 27 is stopped and the voltage is applied to the electromagnetic coil 28, the demagnetized first armature 8 is separated from the first rotor 12 by the action of the permanent magnet 9, and the magnetic flux is transferred to the second rotor. The energized second armature 16 passes from the field core 22 to the second rotor 21 and second armature 16 and is magnetically attracted to the second rotor 21 against the action of the permanent magnet 9.

Since the second armature 16 is designed to rotate together with the first rotor 12 through the meshing of the projections and depressions 17 and 18, the second driven gear 23
It rotates as one. That is, the second driven gear 23 is
The second output shaft 1 is integrally fixed to the first rotor 12
Rotates together with 1.

The rotation speed of the second output shaft 11 at this time is the same as that of the first output shaft 4, but the rotation direction is the same as that of the second driven gear 2.
3, the direction is opposite to that of the first output shaft 4.

As is clear from the above description, in the electric motor of the present invention, one of the two concentric shafts provided on one side continues to rotate at all times, but the other can stop, rotate forward, or rotate in reverse. Therefore, although it is a single electric motor, it can obtain two outputs at the same time, and can drive two systems without any additional equipment.It is small and compact, and can be installed in a limited space. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an embodiment of the electric motor of the present invention, and FIG. 2 is a front view showing a gear train. In the drawings, A...Output generation part, B...Reduction part, 1...Housing, 2...Main shaft, 3...Driving gear, 4...First output shaft,
5... First driven gear, 7... Boss member, 8... First armature, 11... Second output shaft, 13... First field core, 16... Second armature, 17, 18
...Unevenness, 21...Second rotor, 22...Second field core, 23...Second driven shaft, 24...First intermediate gear, 25...Shaft, 26...Second intermediate gear, 27, 28
...Electromagnetic coil.

Claims (1)

[Claims] 1. It has an output generation part, a reduction part that is integrated with the output generation part, a driving gear fixed to a main shaft protruding forward from the reduction part, and a first driven gear that meshes with the driving gear, a reversible electromagnetic clutch unit built into a cylindrical housing and attached to the reduction section, the electromagnetic clutch unit being rotated integrally with the first driven gear; a second driven gear supported on one output shaft so as to freely rotate; a predetermined number of intermediate gears that engage and transmit transmission between the second driven gear and the driving gear;
a tubular second output shaft arranged concentrically with the first output shaft; a forward rotation connecting means capable of being switched and driven to freely rotate the first output shaft and the second output shaft together; and the second output shaft.
The cylindrical housing is composed of a driven gear and a reversing coupling means that can be switched and driven to freely rotate the second output shaft integrally, and is formed to support one end of the first output shaft so as to freely rotate. A through hole is provided in the side wall portion of the gear, and the electromagnetic clutch unit is attached to the reduction portion, so that the driving gear is inserted through the through hole and meshed with the first driven gear and the intermediate gear. One side 2
Output shaft electric motor.