JP5748688B2 - Motor and motor thrust type continuously variable transmission - Google Patents

Description

  The present invention relates to a motor having a rotor rotation stopping function and a motor thrust type continuously variable transmission that controls a gear ratio using the motor.

  Conventionally, as a motor thrust generating mechanism for moving a movable sheave of a motor thrust type continuously variable transmission in the pulley rotation axis direction, a mechanism including a stator fixed to a case, a rotor, and a slide screw member is known. (For example, refer to Patent Document 1).

  The rotor is disposed in the stator via a gap, and is prevented from moving in the pulley rotation axis direction with respect to the case. The slide screw member is screwed with the rotor, converts the rotation operation of the rotor into a movement operation in the pulley rotation axis direction, and slides the movable sheave through the slide screw member.

JP 2005-54815 A

  However, in the conventional motor thrust generating mechanism, the rotor receives a reaction force from the movable sheave via the slide screw member, and this reaction force (force in the axial direction on the slide screw member) It becomes the force which rotates a rotor through the screwing part of a member. For this reason, when the reaction force is received from the movable sheave while the slide screw member is stopped (speed ratio fixed state), the rotor rotates by reverse driving, the slide screw member moves in the axial direction, and the speed ratio is increased. There was a problem of changing.

  The present invention has been made paying attention to the above-mentioned problem, and can prevent the rotor from being reversely driven in synchronization with the interruption of the motor current while allowing the rotor to rotate while the motor current is being supplied. And a motor thrust type continuously variable transmission.

In order to achieve the above object, a motor of the present invention includes a stator fixed to a case, a rotor that is disposed in the stator via a gap, and that rotates by energizing a motor current to a motor coil, and the rotor. Rotor rotation restraining structure that is provided and uses the interruption of energization of the motor current as a trigger, the rotation of the rotor is restrained by fixing to the case, and the energization of the motor current is used as a trigger to release the fixing of the rotor to the case It was set as the means provided with.
The rotor rotation stopping structure is
A clutch portion that stops rotation of the rotor by fastening to be fixed to the case, and that allows rotation of the rotor by fastening release to release fixing of the rotor to the case;
A biasing force fastening portion that fastens the clutch portion with a biasing force by a biasing member when the motor current is interrupted;
An electromagnetic force release portion for fastening and releasing the clutch portion against the biasing force by an electromagnetic force generated by the motor current when the motor current is energized;
Have
A stator coil is wound around the stator, and a three-phase AC motor current obtained by converting DC from the battery by an inverter is supplied to the stator coil.
The electromagnetic force release portion includes a permanent magnet portion and an electromagnet portion that is disposed to face the permanent magnet portion and is electrically connected between the battery and the inverter.

In order to achieve the above object, in the present invention, in a motor thrust type continuously variable transmission in which a belt is stretched between a pair of pulleys and a motor thrust generating mechanism is provided on a movable sheave of the pulleys.
The motor thrust generation mechanism is a means including a motor and a thrust conversion structure.
The motor includes a stator that is fixed to a case, a rotor that is disposed in the stator via a gap, and that is rotationally driven by energizing a motor current to a motor coil, and a rotor rotation restraining structure provided in the rotor of the motor; Have.
The thrust conversion structure converts the rotor rotational force of the motor into a pulley thrust force that causes the movable sheave to slide in the pulley rotation axis direction.
Before SL rotor rotation restraint structure,
A clutch portion that stops rotation of the rotor by fastening to be fixed to the case, and that allows rotation of the rotor by fastening release to release fixing of the rotor to the case;
A biasing force fastening portion that fastens the clutch portion with a biasing force by a biasing member when the motor current is interrupted;
An electromagnetic force release portion for fastening and releasing the clutch portion against the biasing force by an electromagnetic force generated by the motor current when the motor current is energized;
Have
The interruption of the motor current supply is used as a trigger, the rotation of the rotor is stopped by fixing to the case, and the motor current supply is used as a trigger to release the case fixing of the rotor.
A stator coil is wound around the stator, and a three-phase AC motor current obtained by converting DC from the battery by an inverter is supplied to the stator coil.
The electromagnetic force release portion includes a permanent magnet portion and an electromagnet portion that is disposed to face the permanent magnet portion and is electrically connected between the battery and the inverter.

Therefore, when the rotor is stopped by the interruption of the motor current, the rotation of the rotor is restricted by being fixed to the case using the interruption of the motor current as a trigger in the rotor rotation prevention structure. When the rotor is driven to rotate by energization of the motor current, in the rotor rotation restraining structure, energization of the motor current is used as a trigger to release the fixing to the case.
That is, the motor current is energized / interrupted, and the rotor is allowed to rotate / restrained mechanically by releasing the rotor from the case and fixing the rotor. Therefore, during the energization of the motor current, the rotor is allowed to rotate in synchronization with the energization of the motor current. On the other hand, while the motor current is cut off, the rotation of the rotor is stopped by fixing the mechanical case in synchronization with the interruption of the motor current. The reverse drive of is prevented.
As a result, reverse rotation of the rotor can be prevented in synchronism with the interruption of the energization of the motor current while allowing the rotation of the rotor during the energization of the motor current.

1 is an exploded perspective view illustrating a configuration of a motor according to Embodiment 1. FIG. It is sectional drawing which shows the structure of the motor of Example 1, and the rotor fixation effect | action to a case at the time of interruption of energization of motor current (current OFF). It is sectional drawing which shows the structure of the motor of Example 1, and the rotor fixed cancellation | release action to a case at the time of energization of motor current (electric current ON). It is sectional drawing which shows the structure of the motor of Example 2, and the rotor fixing effect | action to a case at the time of the interruption of energization of motor current (current OFF). It is sectional drawing which shows the structure of the motor of Example 2, and the rotor fixed cancellation | release action to a case in (electric current ON) at the time of energization of motor current. FIG. 6 is an overall view showing a motor thrust type continuously variable transmission using a motor having a rotor rotation inhibiting function according to a third embodiment.

  Hereinafter, the best mode for realizing a motor and a motor thrust type continuously variable transmission according to the present invention will be described based on Examples 1 to 3 shown in the drawings.

First, the configuration will be described.
The configuration of the motor according to the first embodiment will be described by dividing it into “overall configuration” and “configuration of rotor rotation stop structure”.

[overall structure]
1 to 3 show the configuration of the motor of the first embodiment. Hereinafter, the overall configuration will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the motor M <b> 1 of the first embodiment includes a case 1, a stator 2, a rotor 3, and a rotor rotation restraining structure 4. This motor M1 is called a permanent magnet synchronous motor (abbreviation of PMSM: Permanent Magnet Synchronous Motor), and has a rotating field structure in which a permanent magnet is provided in the rotor 3 and a coil is provided in the stator 2.

  As shown in FIGS. 1 to 3, the stator 2 includes a stator tooth 21 fixed to the case 1 and a stator coil 22 wound around the stator tooth 21. As shown in FIG. 1, when the motor switch 5 is turned on, a three-phase AC motor current obtained by converting the DC from the battery 6 by the inverter 7 is supplied to the stator coil 22.

  As shown in FIGS. 1 to 3, the rotor 3 is disposed in the stator 2 via a gap, and is driven to rotate by supplying a motor current to the stator coil 22 (motor coil). The cylindrical rotor 3 is integrally fixed with rotor shafts 31 and 32 projecting from both end surfaces on the center axis of the cylinder. As shown in FIGS. 2 and 3, the rotor shafts 31 and 32 are rotatably supported by the case 1 via bearings 11 and 12.

  The rotor rotation restraining structure 4 is provided in the rotor 3 as shown in FIGS. 1 to 3, and the motor current is restrained by fixing the motor 3 to the case 1 using the interruption of the energization of the motor current as a trigger. The rotor fixing to the case 1 is released with the energization of the motor as a trigger. That is, the rotor rotation stopping structure 4 is a mechanism that stops the rotation of the rotor 3 by being fixed to the case 1.

[Configuration of rotor rotation restraint structure]
1 to 3 show the configuration of the motor of the first embodiment. Hereinafter, the structure of the rotor rotation restricting structure will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the rotor rotation stopping structure 4 includes a clutch part 41, an urging force fastening part 42, and an electromagnetic force releasing part 43.

  As shown in FIG. 2, the clutch portion 41 stops the rotation of the rotor 3 by fastening fixed to the case 1, and as shown in FIG. Allow rotation. The clutch portion 41 is fixed at the position of the shaft base portion of the rotor shaft 3, and includes a tapered concave member 41a having a tapered concave surface 411, and a tapered convex member 41b having a tapered convex surface 412 fixed to a permanent magnet portion 43a described later. The taper is fastened by pressing the taper convex surface 412 against the taper concave surface 411.

  The urging force fastening portion 42 taper-fastens the clutch portion 41 with urging forces of a plurality of compression springs 42a (biasing members) when the motor current is cut off. As shown in FIGS. 2 and 3, the plurality of compression springs 42 a (for example, 6 pieces) are interposed between the case 1 and the outer peripheral portion of the permanent magnet portion 43 a, and are taper fixed to the permanent magnet portion 43 a. The convex member 41b is urged to the left in FIGS.

  The electromagnetic force release portion 43 releases the taper engagement of the clutch portion 41 against the biasing force by the electromagnetic force generated by the motor current when the motor current is applied. As shown in FIG. 1, the electromagnetic force release portion 43 is disposed so as to face a disk-shaped permanent magnet portion 43a in which a plurality of permanent magnets 431 (for example, four pieces) are embedded, and the permanent magnet portion 43a. And a disk-shaped electromagnet portion 43b. The electromagnet portion 43b includes a plurality of electromagnets 432 (for example, four pieces) around which a coil electrically connected between the battery 5 and the inverter 6 is wound. And the permanent magnet part 43a side is maintained so that the circumferential direction opposing positional relationship between the plurality of permanent magnets 431 of the permanent magnet part 43a and the plurality of electromagnets 432 of the electromagnet part 43b is maintained regardless of the engagement / release of the clutch part 41. Positioning pins 433 protrude from the plurality of permanent magnets 431 and positioning holes 434 into which the positioning pins 433 are inserted are opened.

  As shown in FIGS. 2 and 3, the open configuration by the electromagnetic force release portion 43 is such that the permanent magnet portion 43 a is relatively opposed to the electromagnet portion 43 b by the electromagnetic force generated in the electromagnet portion 43 b fixed to the case 1. Movement of the clutch portion 41 releases the taper fastening. In the electromagnetic force release part 43 of the first embodiment, the action direction of the electromagnetic force generated in the electromagnet part 43b is a repulsive magnetic force repelling the permanent magnet part 43a, and this repulsive magnetic force acts on the urging force acting on the permanent magnet part 53a. In opposition, the permanent magnet portion 53a is separated from the electromagnet portion 43b to release the taper fastening of the clutch portion 41 (FIG. 3).

Next, the operation will be described.
The operation of the motor M1 according to the first embodiment will be described by dividing it into “rotor rotation inhibiting action when the motor current is cut off” and “rotor rotation allowing action when the motor current is turned on”.

[Rotor rotation suppression when motor current is cut off]
In the system to which the motor M1 of the first embodiment is applied, when the rotor is reversely driven by an external force that is input when the motor is stopped, it is necessary to keep the rotation of the rotor maintained. Hereinafter, based on FIG. 2, the rotor rotation stopping action at the time of interrupting the energization of the motor current reflecting this will be described.

  In order to prevent reverse rotation of the rotor due to an external force that is input when the motor is stopped, it is conceivable to flow a motor current so as to generate a rotor rotational force that opposes the external force. However, in this case, the motor current continues to flow to the stopped motor, and accordingly, the power consumption is increased, the energy efficiency is deteriorated, and the durability reliability of the motor is also lowered.

  On the other hand, in the case of the first embodiment, when the motor switch 5 is switched from ON to OFF, the supply of the three-phase AC motor current from the inverter 7 to the stator coil 22 is stopped. The supply of coil current by direct current to the coil is stopped.

  For this reason, there is no generation | occurrence | production of electromagnetic force in the electromagnet part 43b of the rotor rotation stop structure 4, and the permanent magnet part 53a is electromagnet part 43b by the urging | biasing force by the some compression spring 42a (biasing member) which acts on the permanent magnet part 53a. Approach the side. Then, by moving the permanent magnet portion 53a by the biasing force, the tapered convex surface 412 of the permanent magnet portion 53a of the tapered convex member 41b is pressed against the tapered concave surface 411 of the tapered concave member 41a, as shown in FIG. The opened clutch part 41 is taper-fastened as shown in FIG.

  When an external force is input to the rotor 3 in the taper fastening state that maintains the motor current OFF, the external force is applied to the rotor shaft 32 → tapered concave member 41a → tapered convex member 41b → permanent magnet portion 43a → electromagnet portion 43b. Through the case 1. That is, when the motor current is OFF, the rotation of the rotor 3 is restrained by fixing to the case 1 unless an external force exceeding the frictional fastening force (= biasing force) between the tapered concave member 41a and the tapered convex member 41b is input. The In addition, since the permanent magnet part 43a and the electromagnet part 43b are the states in which the positioning pin 433 was inserted in the positioning hole 434, the permanent magnet part 43a and the electromagnet part 43b do not rotate relatively by the external force of a rotation direction.

  As described above, when the rotor 3 is stopped by the motor current OFF, the rotation of the rotor 3 is stopped by the mechanical rotation to the case 1 in synchronization with the motor current OFF in the rotor rotation stop structure 4. Thus, the reverse drive of the rotor 3 is prevented even when the motor current OFF state is maintained. As a result, compared with the case where the reverse drive of the rotor is prevented by continuing the motor current, the power consumption is reduced, the energy efficiency is improved, and the durability reliability of the motor M1 is also improved.

[Rotor rotation tolerance when the motor current is energized]
As described above, when the rotation of the rotor 3 is stopped by the rotor rotation stopping structure 4, it is necessary that the rotor rotation stopping structure 4 does not hinder the rotation of the rotor 3 when the motor M <b> 1 is driven to rotate. Hereinafter, based on FIG. 3, the rotor rotation permissible action at the time of energizing the motor current reflecting this will be described.

  When the motor switch 5 is turned from OFF to ON, a three-phase AC motor current from the inverter 7 is supplied to the stator coil 22, and at the same time, a DC coil current is supplied to the coil of the electromagnet portion 43b.

  For this reason, an electromagnetic force due to a repulsive magnetic force repelling the permanent magnet portion 43a is generated in the electromagnet portion 43b of the rotor rotation restricting structure 4, and this repulsive magnetic force is applied to a biasing force by a plurality of compression springs 42a acting on the permanent magnet portion 53a. In opposition, the permanent magnet portion 53a is separated from the electromagnet portion 43b. Then, due to the movement of the permanent magnet portion 53a by the repulsive magnetic force that overcomes the urging force, the clutch portion 41 that is taper-fastened as shown in FIG. 2 is tapered from the taper concave surface 411 of the taper concave member 41a as shown in FIG. The taper convex surface 412 of the convex member 41b is released by separating.

  In the fastening open state in which the motor current ON is maintained, only the tapered concave member 41a fixed to the rotor shaft 32 is rotated together with the rotor 3, but the tapered convex member 41b, the permanent magnet portion 43a, and the electromagnet portion 43b are connected to the rotor shaft. Completely disconnected from 32. That is, when the motor current is ON, an increase in rotational load due to the rotor rotation restricting structure 4 can be minimized.

  Thus, when the rotor 3 is rotationally driven by the motor current ON, the stator rotation is prevented from being fixed to the mechanical case 1 in synchronization with the motor current ON in the rotor rotation restraining structure 4. 22 is allowed to freely rotate the rotor 3 in accordance with the three-phase AC motor current supplied from the inverter 7.

That is, the rotor rotation stopping structure 4 stops the rotation of the rotor 3 in complete synchronization with the driving state / stopping state of the motor M1. For this reason, unlike the combination of other systems such as an electromagnetic clutch and an electromagnetic brake, the motor current control is exactly the same as that for driving a motor without the rotor rotation stop structure 4. Therefore,
・ New control is not required ・ Cost reduction ・ Parts simplification ・ System size reduction

Next, the effect will be described.
In the motor M1 of the first embodiment, the effects listed below can be obtained.

(1) a stator 2 fixed to the case 1;
A rotor 3 that is disposed in the stator 2 via a gap and that is rotated by energizing a motor current to the motor coil (stator coil 22);
The rotor 3 is provided with the motor current cut off as a trigger, the rotation of the rotor 3 is stopped by fixing to the case 1, and the motor current supply is used as a trigger to fix the rotor to the case 1. The rotor rotation restricting structure 4 for releasing
Is provided.
For this reason, reverse rotation of the rotor 3 can be prevented in synchronism with the interruption of the energization of the motor current while allowing the rotation of the rotor 3 during the energization of the motor current.

(2) The rotor rotation stopping structure 4 is
A clutch portion 41 that stops rotation of the rotor 3 by fastening that is fixed to the case 1 and that allows rotation of the rotor 3 by fastening release that releases the fixing of the rotor to the case 1;
A biasing force fastening portion 42 for fastening the clutch portion 41 with a biasing force by a biasing member (compression spring 42a) when the motor current is interrupted;
An electromagnetic force releasing portion 43 for fastening and releasing the clutch portion 41 against the biasing force by an electromagnetic force generated by the motor current when the motor current is applied;
Have
For this reason, in addition to the effect of (1), the drive control of the rotor rotation stopping structure 4 can be simplified by driving the rotor rotation stopping structure 4 with the motor current for motor control.

(3) The stator 2 is wound with a stator coil 22, and a three-phase AC motor current obtained by converting DC from the battery 6 by the inverter 7 is supplied to the stator coil 22.
The electromagnetic force release part 43 is a permanent magnet part 43a, an electromagnet part 43b that is disposed opposite to the permanent magnet part 43a and is electrically connected between the battery 6 and the inverter 7,
Have
For this reason, in addition to the effect of (2), the electromagnetic force release part 43 of the rotor rotation restricting structure 4 is driven using the direct current upstream from the inverter 7 while the motor M1 is driven by a three-phase alternating current motor current. be able to.
That is, in the case of the motor M1 that is driven by a three-phase AC motor current, the electromagnet portion 43b cannot function if connected to the downstream side of the inverter 7.

(4) In the electromagnetic force release part 43, the electromagnet part 43b is fixed to the case 1, and the permanent magnet part 43a is relatively relative to the electromagnet part 43b according to the electromagnetic force generated in the electromagnet part 43b. The clutch part 41 is fastened and released by moving.
For this reason, in addition to the effect of (3), when connecting the electromagnetic force release part 43, the connection from the battery 6 to the electromagnet part 43b and the connection from the electromagnet part 43b to the inverter 7 are not lengthened, and Reliability can also be improved.
For example, contrary to the first embodiment, when the permanent magnet part is fixed to the case and the electromagnet part can be moved, the connection from the battery to the electromagnet part and the connection from the electromagnet part to the inverter are separated by the movement of the electromagnet part. It is necessary to lengthen the wire, and the wire is easily broken by moving the electromagnet portion.

(5) In the electromagnetic force release portion 43, the direction of the electromagnetic force generated in the electromagnet portion 43b is a repulsive magnetic force repelling the permanent magnet portion 43a, and the repulsive magnetic force causes the permanent magnet portion 43a to move to the electromagnet. The clutch part 41 is fastened and released away from the part 43b.
For this reason, in addition to the effect of (4), the repulsive magnetic force which becomes the largest when the permanent magnet part 43a is separated from the electromagnet part 43b arranged to face each other can be used to separate and open the clutch part 41.

  The second embodiment is an example in which the clutch portion is fastened and released by a repulsive magnetic force, whereas the first clutch portion is fastened and released by an attractive magnetic force.

First, the configuration will be described.
4 and 5 show the configuration of the motor M2 of the second embodiment. Hereinafter, the configuration of the rotor rotation restraining structure will be described with reference to FIGS. 4 and 5.

  As shown in FIGS. 4 and 5, the plurality of compression springs 42a of the urging force fastening portion 42 are interposed between an electromagnet portion 43b fixed to the case 1 and a permanent magnet portion 43a. The taper convex member 41b fixed to the portion 43a is urged to the left in FIGS.

As shown in FIGS. 4 and 5, the open configuration by the electromagnetic force release portion 43 is such that the permanent magnet portion 43 a is relative to the electromagnet portion 43 b by the electromagnetic force generated in the electromagnet portion 43 b fixed to the case 1. The second embodiment is the same as the first embodiment in that the taper fastening of the clutch portion 41 is released by moving in the same manner. However, in the electromagnetic force release part 43 of the second embodiment, the action direction of the electromagnetic force generated in the electromagnet part 43b is an attractive magnetic force that attracts the permanent magnet part 43a, and this attractive magnetic force acts on the permanent magnet part 53a. The permanent magnet portion 53a approaches the electromagnet portion 43b against the force and releases the taper fastening of the clutch portion 41 (FIG. 5).
Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

Next, the rotor rotation allowing action when the motor current is supplied will be described.
When the motor switch 5 is turned from OFF to ON, a three-phase AC motor current from the inverter 7 is supplied to the stator coil 22, and at the same time, a DC coil current is supplied to the coil of the electromagnet portion 43b.

For this reason, an electromagnetic force is generated in the electromagnet portion 43b of the rotor rotation restricting structure 4 by an attractive magnetic force that attracts the permanent magnet portion 43a. In opposition, the permanent magnet portion 53a approaches the electromagnet portion 43b. Then, due to the movement of the permanent magnet portion 53a by the attractive magnetic force that overcomes the urging force, the clutch portion 41 that is taper-fastened as shown in FIG. The taper convex surface 412 of the convex member 41b is released by separating.
Since other operations are the same as those of the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the motor M2 of the second embodiment, the following effects can be obtained.

(6) In the electromagnetic force release part 43, the acting direction of the electromagnetic force generated in the electromagnet part 43b is an attractive magnetic force that attracts the permanent magnet part 43a, and the permanent magnet part 43a is caused to attract the electromagnet by the attractive magnetic force. The clutch part 41 is fastened and released by approaching the part 43b.
For this reason, in addition to the effects of (1) to (4) in the first embodiment, the electromagnet part 43b and the permanent magnet part 43a that are arranged to face each other approach and use the attractive magnetic force that increases as the clutch is disengaged. The fastening can be released and released.

  The third embodiment is an example of a motor thrust type continuously variable transmission including a motor thrust generating mechanism using the motor M1 of the first embodiment or the motor M2 of the second embodiment.

First, the configuration will be described.
The configuration of the motor thrust type continuously variable transmission according to the third embodiment will be described by dividing it into “overall configuration” and “transmission ratio control configuration”.

[overall structure]
FIG. 6 shows a motor thrust type continuously variable transmission. The overall configuration of the motor thrust type continuously variable transmission will be described below with reference to FIG.

  The motor thrust type continuously variable transmission M-CVT spans a belt 9 between a pair of primary pulleys 8 (pulleys) and a secondary pulley (pulley) (not shown), and changes the contact diameter of the belt 9 with respect to the primary pulley 8 and the secondary pulley. To control the gear ratio steplessly. The primary pulley 8 includes a fixed sheave 81 and a movable sheave 82, and the movable sheave 82 is provided with a motor thrust generating mechanism 10 that slides the movable sheave 82 in the pulley axial direction at the time of shifting. Although not shown, a motor thrust generating mechanism 10 is also provided on the movable sheave of the secondary pulley. Further, the movable sheave 82 indicates the lowest position above the pulley shaft in FIG. 6, and indicates the highest position below the pulley shaft.

The motor thrust generation mechanism 10 includes the motor M1 of Embodiment 1 (or the motor M2 of Embodiment 2) and the thrust conversion structure 13. The motor M1 (or motor M2) is fixed to the case 1. The stator 2 is disposed through a gap, and the rotor 3 is rotated by energizing the stator coil 22 with a motor current, and the rotor rotation restraining structure 4 is provided on the rotor 3. The rotor rotation restricting structure 4 is triggered by the interruption of the motor current supply when the gear ratio is fixed, and the rotation of the rotor 3 is stopped by being fixed to the case 1. Release the case fixing. See Examples 1 and 2 for the detailed configuration.

  The thrust conversion structure 13 is a structure that converts the rotor rotational force of the motor M1 (or the motor M2) into a pulley thrust force that slides the movable sheave 82 in the pulley rotational axis direction. The thrust conversion structure 13 includes a worm 13a, a slide worm wheel 13b, a fixed screw 13c, a slide piston 13d, and a disc spring 13e. The worm 13 a is provided on the rotor shaft 31. The slide worm wheel 13b meshes with the worm 13a and is screwed with the fixing screw 13c. The fixing screw 13c is fixed to the transmission case 14 and meshes with the slide worm wheel 13b. The slide piston 13d and the disc spring 13e are interposed between the slide worm wheel 13b and the movable sheave 82.

[Gear ratio control configuration]
FIG. 6 shows a motor thrust type continuously variable transmission. Hereinafter, the gear ratio control configuration will be described with reference to FIG.

  As shown in FIG. 6, the motor M <b> 1 (or motor M <b> 2) includes a vehicle-mounted battery 23 (power source), an inverter 24 (drive circuit), an electromagnetic open / close switch 25, and a speed change controller 26. The configuration is connected.

  The inverter 24 generates a motor current based on a three-phase alternating current from a power source current (direct current) of the in-vehicle battery 23 according to a command from the transmission controller 26. When the command from the speed change controller 26 is an energization command for the motor current (= when shifting), a command to close the electromagnetic open / close switch 25 is output in synchronization with the energization command, and the power source current (DC) of the in-vehicle battery 23 is changed to the rotor. It is supplied to the coil of the rotation stopping structure 4. When the command from the speed change controller 26 is a motor current cut-off command (= when the gear ratio is fixed), a command to open the electromagnetic open / close switch 25 is output in synchronization with the power cut-off command to stop the rotor rotation. The DC supply to the structure 4 coil is cut off.

  The speed change controller 26 inputs information from a vehicle speed sensor 26a, an accelerator opening sensor 26b, an input rotation sensor 26c, an output rotation sensor 26d, a resolver 26e for detecting the rotation position of the motor, and the like. Then, the target speed ratio is calculated based on the vehicle speed VSP, the accelerator opening APO, the speed ratio map, etc., and when the actual speed ratio matches the target speed ratio, or the speed ratio difference is within a predetermined allowable range, A request to maintain a gear ratio is made to keep the gear ratio constant. When the gear ratio difference between the actual gear ratio and the target gear ratio deviates beyond a predetermined allowable range, a gear ratio change request is issued. When there is a request to maintain the transmission ratio to keep the transmission ratio constant, a command to maintain the interruption of the motor current to motor M1 (or motor M2) is output to inverter 24, and the transmission ratio is changed. When there is a change request, a command for energizing the motor current to the motor M1 (or the motor M2) is output to the inverter 24 according to the request.

Next, the operation will be described.
The operation of the motor thrust type continuously variable transmission M-CVT according to the third embodiment will be described separately for “transmission ratio control operation when a transmission ratio change is requested” and “transmission ratio fixing operation when a transmission ratio is maintained”.

[Gear ratio control action when a gear ratio change is requested]
When there is a speed change request for changing the speed ratio, a command for energizing the motor current to the motor M1 (or motor M2) is output from the speed change controller 26 to the inverter 24 in response to the request. In synchronization with this energization command, the inverter 24 outputs a command to close the electromagnetic opening / closing switch 25, and the power source current (direct current) of the in-vehicle battery 23 is supplied to the coil of the rotor rotation restraining structure 4.

  Therefore, electromagnetic force is generated in the electromagnet portion 43b of the rotor rotation restraining structure 4, the clutch portion 41 of the rotor rotation restraining structure 4 is released, and the case fixing of the rotor 3 is released, so that the stator coil 22 is released. The rotor 3 is allowed to freely rotate in accordance with the three-phase AC motor current supplied from the inverter 24.

  Therefore, when the rotor shaft 31 of the motor M1 (or the motor M2) is rotationally driven by supplying the three-phase AC motor current, the worm 13a is rotated by the same rotation as the rotor shaft 31, and the slide worm wheel 13b meshing with the worm 13a is moved. Decelerate and rotate. When the slide worm wheel 13b rotates at a reduced speed, since the slide worm wheel 13b is screwed with the fixed screw 13c, the screwing position with the fixed screw 13c changes, and the slide worm wheel 13b slides in the pulley axial direction. . That is, the rotation operation and the rotation force of the motor M1 (or the motor M2) are converted into the slide operation of the slide worm wheel 13b and the pulley thrust force.

  The converted pulley thrust is applied to the movable sheave 82 from the slide worm wheel 13b via the slide piston 13d and the disc spring 13e, and the movable sheave 82 is slid in the pulley axial direction. At this time, if the movable sheave 82 is slid in the left direction in FIG. 6, the gear ratio is changed to the high side, and conversely, if the movable sheave 82 is slid in the right direction in FIG. Changed to

[Gear ratio fixing action when required to maintain speed ratio]
When there is a transmission ratio maintenance request for maintaining a constant transmission ratio, a command to cut off the motor current from the transmission controller 26 to the motor M1 (or the motor M2) is output to the inverter 24 in response to the request. In synchronism with this energization cutoff command, the inverter 24 outputs a command to open the electromagnetic opening / closing switch 25, and the DC supply to the coils of the rotor rotation restraining structure 4 is also shut off.

  For this reason, there is no generation of electromagnetic force in the electromagnet portion 43b of the rotor rotation restraining structure 4, and the clutch portion 41 of the rotor rotation restraining structure 4 is fastened by the urging force, so that the rotor 3 is locked to the case 1. Thus, reverse driving of the rotor 3 due to belt reaction force or the like is prevented.

  That is, when the movable sheave 82 receives a belt reaction force having a vibration component from the belt 9 that transmits the driving torque, the axial reaction force slides from the movable sheave 82 via the slide piston 13d and the disc spring 13e. It is transmitted to the worm wheel 13b. Then, a reaction force acts on the screwed portion of the slide worm wheel 13b and the fixed screw 13c and the screwed portion of the slide worm wheel 13b and the worm 13a, and tries to rotate the worm 13a.

  However, since the rotor shaft 31 of the rotor 3 provided with the worm 13a is fixed to the case 1 by the rotor rotation restraining structure 4, the rotation of the worm 13a by reverse driving is prevented. In other words, when the transmission gear ratio is required to be maintained by interrupting the motor current, the position of the movable sheave 82 in the pulley axial direction is fixed, and during the interruption of the motor current, the fixed position of the movable sheave 82 in the pulley axial direction is maintained. . In other words, a change in the gear ratio due to a change in the position of the movable sheave 82 in the pulley axial direction is prevented during the interruption of the motor current.

Next, the effect will be described.
In the motor thrust type continuously variable transmission M-CVT of the third embodiment, the following effects can be obtained.

(7) In a motor thrust type continuously variable transmission M-CVT in which a belt 9 is stretched between a pair of pulleys (primary pulley 8) and a motor thrust generating mechanism 10 is provided on a movable sheave 82 of the pulley (primary pulley 8).
The motor thrust generating mechanism 10 includes:
A stator 2 fixed to the case 1, a rotor 3 that is disposed in the stator 2 via a gap and that is rotated by energizing a motor current to the motor coil (stator coil 22), and a rotor provided in the rotor 3 A motor M1, M2 having a rotation stopping structure 4;
A thrust conversion structure 13 that converts the rotor rotational force of the motors M1 and M2 into a pulley thrust that slides the movable sheave 82 in the pulley rotational axis direction;
The rotor rotation restricting structure 4 is triggered by the interruption of the motor current supply, stops the rotation of the rotor 3 by fixing to the case 1, and the motor current supply is used as a trigger to fix the case of the rotor 3. Is released.
For this reason, at the time of shifting due to energization of the motor current, while allowing the change of the gear ratio due to rotation of the rotor 3, when the transmission ratio is fixed due to the energization interruption of the motor current, the reaction force is caused by the rotor rotation restraint synchronized with the energization interruption. Even if it acts, the fixed gear ratio can be maintained.

(8) A drive circuit (inverter 24) for generating a motor current from a power supply current is connected to the motors M1 and M2.
A shift controller 26 for controlling a gear ratio is connected to the drive circuit (inverter 24),
When there is a transmission ratio holding request for keeping the transmission ratio constant, the transmission controller 26 outputs a command for maintaining the interruption of the motor current to the motors M1 and M2 and changes the transmission ratio. When there is a command, a command for energizing the motor current to the motors M1 and M2 is output as required.
For this reason, in addition to the effect of (7), by performing the gear ratio holding control by cutting off the motor current, the power consumption in the gear ratio control can be reduced, the energy efficiency can be improved, and the motor The durability reliability of M1 and M2 can be improved.

  As described above, the motor of the present invention has been described based on the first and second embodiments, and the motor thrust type continuously variable transmission of the present invention has been described on the basis of the third embodiment. The invention is not limited, and design changes and additions are allowed without departing from the spirit of the invention according to each claim of the claims.

  In the first and second embodiments, as the clutch portion 41, an example in which the taper concave member 41a and the taper convex member 41b are pressed by axial movement to perform taper fastening is shown. However, examples of the clutch portion may include a single-plate clutch structure or a multi-plate clutch structure that presses the friction plate, or a dog clutch structure that is fastened by engaging the claws. Furthermore, the clutch portion is not limited to one that is fastened by movement in the axial direction, and may be an example in which the rotor rotation is stopped by movement in the circumferential direction or radial direction.

  In the first and second embodiments, an example in which a plurality of compression springs 42 a are used as the urging force fastening portion 42 and the urging force for fastening the clutch portion 41 is generated is shown. However, as the biasing force fastening portion, a tension spring may be used to generate a biasing force that fastens the clutch portion.

  In the third embodiment, the worm 13a, the slide worm wheel 13b, and the fixed screw 13c are used as the thrust conversion structure 13, and the rotor rotational force of the motors M1 and M2 is converted into pulley thrust. However, as the thrust conversion structure, the motor shaft is arranged in parallel to the primary pulley shaft, or the motor shaft and the primary pulley shaft are arranged to coincide with each other, and the screw mechanism is rotated by the rotation of the motor so that the rotor rotational force of the motor is increased. A specific structure is not limited to the third embodiment as long as it is a structure that converts the rotor rotational force of the motor into a pulley thrust force, such as one that is converted into a pulley thrust force.

  In the third embodiment, the motor of the present invention is applied to a motor thrust type continuously variable transmission. However, the motor of the present invention can be applied to various systems other than the motor thrust type continuously variable transmission. In short, the present invention can be applied to any system that uses a motor and is required to suppress the rotation of the rotor due to reverse drive when the motor is stopped due to motor current OFF, and the motor thrust type continuously variable transmission is an example.

  In the first, second, and third embodiments, motors M1 and M2 that use a permanent magnet synchronous motor are shown. However, the motor may be an example of an induction motor without a permanent magnet.

M1, M2 Motor 1 Case 2 Stator 21 Stator teeth 22 Stator coil 3 Rotor 4 Rotor rotation restraining structure 41 Clutch part 42 Energizing force fastening part 42a Compression spring (urging member)
43 Electromagnetic force opening part 43a Permanent magnet part 43b Electromagnet part 5 Motor switch 6 Battery 7 Inverter
M-CVT Motor thrust type continuously variable transmission 8 Primary pulley (pulley)
9 Belt 81 Fixed sheave 82 Movable sheave 10 Motor thrust generating mechanism 13 Thrust conversion structure 23 On-vehicle battery (power supply)
24 Inverter (drive circuit)
25 Electromagnetic open / close switch 26 Speed change controller

Claims (6)

A stator fixed to the case;
A rotor that is disposed in the stator via a gap and that is rotated by energizing a motor current to the motor coil;
A rotor that is provided in the rotor and that uses the interruption of energization of the motor current as a trigger, stops the rotation of the rotor by fixing to the case, and uses the energization of the motor current as a trigger to release the fixing of the rotor to the case Rotation stop structure,
Equipped with a,
The rotor rotation stopping structure is
A clutch portion that stops rotation of the rotor by fastening to be fixed to the case, and that allows rotation of the rotor by fastening release to release fixing of the rotor to the case;
A biasing force fastening portion that fastens the clutch portion with a biasing force by a biasing member when the motor current is interrupted;
An electromagnetic force release portion for fastening and releasing the clutch portion against the biasing force by an electromagnetic force generated by the motor current when the motor current is energized;
Have
The stator is wound with a stator coil, and the stator coil is supplied with a three-phase AC motor current obtained by converting DC from the battery by an inverter,
The electromagnetic force release portion includes a permanent magnet portion and an electromagnet portion that is disposed to face the permanent magnet portion and is electrically connected between the battery and the inverter . The motor according to claim 1 ,
The electromagnetic force release part is configured such that the electromagnet part is fixed to a case, and the permanent magnet part moves relative to the electromagnet part in accordance with the electromagnetic force generated in the electromagnet part. A motor characterized by being fastened and released. The motor according to claim 2 ,
The electromagnetic force release portion is a repulsive magnetic force in which the direction of electromagnetic force generated in the electromagnet portion repels the permanent magnet portion, and the repulsive magnetic force causes the permanent magnet portion to move away from the electromagnet portion and the clutch portion. A motor characterized by fastening and releasing. The motor according to claim 2 ,
In the electromagnetic force release portion, the action direction of the electromagnetic force generated in the electromagnet portion is an attractive magnetic force that attracts the permanent magnet portion, and the permanent magnet portion approaches the electromagnet portion due to the attractive magnetic force, and the clutch portion A motor characterized by fastening and releasing. In a motor thrust type continuously variable transmission in which a belt is stretched between a pair of pulleys and a motor thrust generating mechanism is provided on the movable sheave of the pulley,
The motor thrust generating mechanism is
A motor having a stator fixed to a case, a rotor disposed in the stator via a gap and driven to rotate by energizing a motor current to a motor coil, and a rotor rotation restraining structure provided in the rotor;
A thrust conversion structure that converts the rotor rotational force of the motor into a pulley thrust force that slides the movable sheave in the pulley rotation axis direction;
The rotor rotation stopping structure is
A clutch portion that stops rotation of the rotor by fastening to be fixed to the case, and that allows rotation of the rotor by fastening release to release fixing of the rotor to the case;
A biasing force fastening portion that fastens the clutch portion with a biasing force by a biasing member when the motor current is interrupted;
An electromagnetic force release portion for fastening and releasing the clutch portion against the biasing force by an electromagnetic force generated by the motor current when the motor current is energized;
Have
Triggering the interruption of the energization of the motor current, stopping the rotation of the rotor by fixing to the case, using the energization of the motor current as a trigger, releasing the case fixing of the rotor ,
The stator is wound with a stator coil, and the stator coil is supplied with a three-phase AC motor current obtained by converting DC from the battery by an inverter,
The electromagnetic force release portion includes a permanent magnet portion and an electromagnet portion that is disposed opposite to the permanent magnet portion and is electrically connected between the battery and the inverter. Continuously variable transmission. In the motor thrust type continuously variable transmission according to claim 5 ,
A drive circuit for generating a motor current from a power supply current is connected to the motor,
A shift controller for controlling a gear ratio is connected to the drive circuit;
When there is a transmission ratio holding request to keep the transmission ratio constant, the transmission controller outputs a command to maintain the interruption of energization of the motor current to the motor, and when there is a transmission ratio change request to change the transmission ratio, A motor thrust type continuously variable transmission that outputs a command to energize the motor current to the motor in response to a request.