JP4045633B2 - Auxiliary drive system using starter motor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an accessory driving apparatus using a starter motor.
[0002]
[Prior art]
Japanese Utility Model Laid-Open No. 56-135314 proposes a torque transmission mechanism of a two-motor, one-load switching drive type that transmits torque from a motor and an engine to a compressor through a one-way clutch.
Japanese Patent Laid-Open No. 57-49067 transmits a starting torque from a starter motor to an engine through a one-way clutch, and further transmits a torque from the starter motor to a vehicle auxiliary device through another one-way clutch. A torque transmission mechanism of 1 prime mover 2 load switching drive type in which switching is performed by rotating the motor in the positive and other directions is proposed.
[0003]
[Problems to be solved by the invention]
As described above, in the torque transmission mechanism disclosed in Japanese Utility Model Laid-Open No. 56-135314, by using two one-way clutches, a vehicle auxiliary machine can be driven by any one of a motor and an engine.
However, in this torque transmission mechanism, although the vehicle auxiliary machine can be electrically driven even when the engine is stopped, for that purpose, a dedicated motor, two one-way clutches, and a torque transmission mechanism between them must be equipped. There was a difficulty in that the degree of configuration increase was greater than the degree of convenience increase.
[0004]
Next, since the torque transmission mechanism disclosed in Japanese Patent Laid-Open No. 57-49067 uses a starter motor to drive a vehicular auxiliary machine, the vehicle auxiliary machine can be obtained by adding only one one-way clutch without using a motor. Although there is an advantage that the electric drive of the machine is realized, since the auxiliary equipment for the vehicle must always be driven electrically and cannot be driven directly by the engine, there are always losses of the generator, starter motor, battery, etc. Was bad. Further, since the starter motor is usually composed of a direct current motor having a large starting torque, it has a rectifying mechanism, so there is a concern that the wear of the starter motor increases.
[0005]
The present invention has been made in view of the above problems, and provides an accessory driving device using a starter motor capable of driving a vehicle auxiliary machine with any one of engine driving and electric driving while avoiding the complexity of the configuration. Doing that is a problem to be solved.
[0006]
[Means for Solving the Problems]
  Main departureMing's deviceThe engine is started by rotating the motor in a predetermined direction while the engine is stopped. At this time, transmission of torque from the motor to the auxiliary machine is interrupted to prevent wasteful power consumption. Further, the auxiliary machine can be driven by rotating the motor in the other direction when the engine is stopped, and at this time, torque transmission from the motor to the engine is cut off to prevent useless power consumption. Furthermore, while the engine is running, the engine can be driven by the engine. At this time, the torque transmission from the motor to the auxiliary machine and the torque transmission from the engine to the motor are cut off, preventing unnecessary power consumption and engine torque. And prevent motor torque interference.
[0007]
  In this way, switching between engine start and accessory drive by a single motor can be realized, and the accessory drive by the engine is performed, thus reducing power consumption and improving fuel efficiency while eliminating the complexity of the configuration. Can be realized.
  The device of the present inventionIn addition, a reduction mechanism that transmits the rotational torque in the predetermined direction output from the output shaft of the motor in the same rotational direction as the rotational torque in the other direction of the motor and then transmits the rotational torque to the engine as a starting torque, such as a planetary reduction gear mechanism TheHave.
[0008]
In this way, in the torque transmission mechanism, particularly using the belt and pulley, torque reversal can be realized in the speed reduction mechanism, so that the mechanism can be simplified.
That is, driving the auxiliary machine with the rotational torque in the other direction of the motor means that the auxiliary machine performs work by the rotation in the other direction. However, when the engine is started with the rotational torque in the predetermined direction of the motor, if there is no torque reversal, the engine is started in the rotational direction in the predetermined direction. It is impossible to drive an auxiliary machine that cannot be driven forward and reverse. Providing a torque reversing mechanism between the engine and the auxiliary machine requires a large power loss if the driving of the auxiliary machine by the engine is the main operation mode, and requires a complicated configuration. Even when a dedicated torque reversing mechanism is provided between the motor and the engine, it is impossible to avoid the complication of the configuration.
[0009]
This configuration uses a reduction mechanism such as a planetary reduction gear mechanism whose output is opposite to the input as a reduction mechanism that decelerates and increases the engine starting torque of the motor, so that a belt, pulley, etc. can be used without using a dedicated torque reversing mechanism. The torque transfer relationship of claim 1 can be easily realized by using a simple torque transmission unit. Further, it is advantageous for the arrangement of a belt auto-tensioner or the like in which effective operation becomes difficult by changing the transmission direction.
[0010]
  Further, the speed reducer used as the reversing mechanism increases the motor torque at the time of starting, and thus has a configuration advantageous for starting that requires a higher torque than the driving of the auxiliary equipment.
  The device of the present inventionFurthermore, two systems of torque transmission parts (for example, belts and pulleys) and at least two clutchesHaveOne of them is a one-way clutch.
[0011]
This will be described in more detail.
A first torque transmission unit (three-way coupling unit) for connecting the output shaft of the motor speed reduction mechanism, the crank shaft of the engine and the drive shaft of the auxiliary machine so as to be able to transmit torque; an output shaft of the motor and a drive shaft of the auxiliary machine; Are connected in parallel with a second torque transmission portion (two-way coupling portion) that couples the two to each other. Furthermore, a first clutch (one-way clutch) that transmits the reverse deceleration torque output from the output shaft of the speed reduction mechanism to the first torque transmission unit, and the auxiliary machine through the second torque transmission unit from the output shaft of the motor. A second clutch for transmitting torque to the drive shaft;
[0012]
In this way, the first clutch prevents torque transmission from the engine to the motor after starting the engine with a normal starter motor, thus eliminating the influence on the motor even when the engine is driven by an auxiliary machine. Can do. Further, the torque transmission from the motor to the auxiliary machine can be cut off by cutting off the second clutch when the engine is started by the motor.
[0013]
  Also, when the accessory is driven by the motor through the second clutch, the first clutch is a one-way clutch, so it is automatically shut off, so that the motor drives the engine when the accessory is driven by the motor. Can be prevented.
  In a preferred embodiment,A third clutch for detachably connecting the first torque transmission part and the drive shaft of the auxiliary machineIs provided.
[0014]
  In this way, when the accessory is driven by the motor, the third clutch is disengaged to prevent reverse driving from the accessory driven by the motor to the engine. Thus, when the engine is started, further torque transmission from the engine to the auxiliary machine can be prevented.
  In a preferred embodiment,A single system torque transmission unit (for example, a belt and a pulley) and at least two clutches are provided, and the clutch on the side that transmits engine starting torque from the motor to the engine is a one-way clutch.
[0015]
This will be described in more detail.
A single torque transmission unit is provided for connecting the output shaft of the speed reduction mechanism, the crankshaft of the engine, and the drive shaft of the auxiliary machine so that torque can be transmitted.
The reverse deceleration torque output from the output shaft of the speed reduction mechanism is transmitted to the torque transmission section through the first clutch formed of a one-way clutch as engine start torque (torque for engine start). At this time, the second clutch is disengaged to prevent direct accessory driving by the output shaft of the motor. Naturally, the third clutch that connects the torque transmission unit and the engine is turned on (connected).
[0016]
After starting the engine, the first clutch (one-way clutch) is disengaged and the third clutch is turned on. At this time, the engine is driven directly by the engine by shutting off the second clutch. To prevent.
Next, when the engine is stopped, the third clutch is turned off, and the motor is driven in the other direction by rotating the motor in the other direction. At this time, the first clutch is a one-way clutch, and the reverse rotation torque is prevented from being transmitted idly to the torque transmission unit.
[0017]
  In this way, although it is necessary to increase the number of clutches, the number of torque transmission parts such as belts and pulleys can be reduced, so that the space can be saved and the configuration can be simplified. The third clutch is preferably a normally-on type.
  In a preferred embodiment,A fourth clutch for detachably connecting the torque transmission part and the drive shaft of the auxiliary machineIs provided.
[0018]
  In this way, when the engine is started by the motor, the fourth clutch is disengaged to avoid driving the auxiliary machinery by the motor and reduce power consumption. Machine drive.
  In a preferred embodiment,The motor and the auxiliary machine are integrated, and the drive shaft of the auxiliary machine is coaxially arranged in the hollow output shaft of the motor. Furthermore, a single torque transmission unit is provided for connecting the output shaft of the speed reduction mechanism, the crankshaft of the engine, and the drive shaft of the auxiliary machine so that torque can be transmitted.
[0019]
The reverse deceleration torque output from the output shaft of the speed reduction mechanism is transmitted to the torque transmission section through the first clutch formed of a one-way clutch as engine start torque (torque for engine start).
Further, when the second clutch is turned on and the motor is rotated in the other direction, the output shaft of the motor drives the auxiliary machine without passing through the torque transmission unit. At this time, the first clutch is a one-way clutch. Since there is, it is idle.
[0020]
  In this way, by integrating the motor and the auxiliary machine, it is possible to simplify the installation when mounting the engine, save space, reduce the number of pulleys, and simplify the configuration. it can.
  In a preferred aspect, a third clutch that connects the output shaft of the speed reduction mechanism and the torque transmission portion so as to be able to contact and separate.Is provided.
[0021]
  In this way, when the engine is started by the motor, the third clutch is disengaged to avoid driving the auxiliary machinery by the motor and reduce power consumption. Machine drive.
  In a preferred embodiment, the secondThe clutch is a one-way clutch. In this way, since the clutch on / off control can be automatically performed, the structure and control of the second clutch are simplified, and no power consumption is required.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of an accessory drive apparatus using the starter motor of the present invention will be described based on the following examples.
[0029]
[Example 1]
An auxiliary machine driving apparatus using the starter motor according to the first embodiment will be described below with reference to FIGS.
(Constitution)
The accessory driving apparatus using the starter motor includes a motor 100, an engine 200, a vehicle air conditioning compressor 300 as an accessory, and a torque transmission mechanism 400.
[0030]
(Motor 100)
The motor 100 is a well-known DC motor, and its armature 1 is rotatably supported by a housing 4 by bearings 2 and 3. The housing 4 holds a brush 6 and a brush 6 that are in sliding contact with the commutator 5. The brush holder 7 and the field element 8 facing the outer peripheral surface of the armature 1 are disposed. The housing 4 further houses a planetary reduction gear mechanism 401 that forms a part of the torque transmission mechanism 400.
[0031]
(Planet reduction gear mechanism 401)
The sun gear 9 of the planetary reduction gear 401 is fitted and fixed to the output shaft 16 of the armature 1, and the sun gear 9 meshes with the planetary gear 10. The planetary gear 10 is rotatably supported by a pin portion 11 fixed to the housing 4 and meshes with a sun internal gear (internal gear) 12. The sun internal gear 12 is rotatably supported by the housing 4 via a bearing 13 and outputs a deceleration output to a one-way clutch 402 adjacent to the axially opposite motor side.
[0032]
(One-way clutch 402)
FIG. 2 shows a radial sectional view (AA sectional view) of the one-way clutch 402 constituting the first clutch in the present invention.
A one-way clutch 402 that forms part of the torque transmission mechanism 400 is disposed in the housing 4 of the motor 100. Since the sun inner gear 12 of the planetary reduction gear mechanism 401 also serves as a clutch inner shaft (clutch inner) of the one-way clutch 402, it is also referred to as a sun inner gear / clutch inner shaft in the following.
[0033]
A pulley 14 for starting the engine, which forms part of the torque transmission mechanism 400, is provided on the side opposite to the motor in the axial direction of the one-way clutch 402. The pulley 14 for starting the engine is a clutch outer shaft ( The engine starting pulley 14 and the clutch outer shaft 15 are rotatably supported on the output shaft 16 of the armature 1 via bearings 17 and 18.
[0034]
The one-way clutch 402 includes a sprag 19, a retainer 20, and a spring 21 together with a sun inner gear / clutch inner shaft 12 and a clutch outer shaft 15. 12 is interposed between the outer peripheral surface of 12 and the inner peripheral surface of the clutch outer shaft 15.
[0035]
As shown in FIG. 4, a total of eight sprags 19 are slidably fitted into holes 22 and 23 respectively provided in a radially outer retainer 20 and a radially inner spring 21 each having a substantially cylindrical shape. . The sprag 19 is in contact with the inner peripheral surface of the clutch outer shaft 15 at point A, and is in contact with the outer peripheral surface of the sun inner gear / clutch inner shaft 12 at point B. The center of gravity G of the sprag 19 is It is shifted by a predetermined distance to one side in the circumferential direction with respect to a line extending in the radial direction connecting the core.
[0036]
The retainer 20 is fixed to the clutch outer shaft 15, and the spring 21 urges a portion of the sprag 19 (not shown) (the back side in FIG. 4) toward the inside of the diameter with a predetermined urging force. The sprag 19 is pressed against the outer peripheral surface of the clutch inner shaft 12.
(Belt and pulley mechanism 403)
Next, the belt and pulley mechanism 403 that constitutes the torque transmitting portion in the present invention will be described.
[0037]
As described above, the clutch outer shaft 15 is fixed to the engine starting pulley 14 adjacent to the side opposite to the motor in the axial direction. The pulley 14 includes a pulley 24 fixed to the crankshaft of the engine 200 and an electromagnetic clutch. Is connected to the pulley 27 of the compressor 300 via the belt 26. The belts 26 are connected.
[0038]
A pulley 28 for driving a compressor is fixed to an output shaft 16 that forms a rotor together with the armature 1 by a nut 29, and the pulley 28 is connected to a pulley 30 of a compressor (auxiliary machine) 300 via a belt 31. The pulley 30 is rotatably supported on the drive shaft 32 of the compressor 300 via a pair of bearings 33 and is connected to the drive shaft 32 via a one-way clutch 404. Reference numeral 34 denotes a nut for locking the pair of bearings 33 and locking the hollow drive shaft 32 to the shaft 40 of the compressor 300.
[0039]
(One-way clutch 404)
Next, FIG. 3 shows a radial sectional view of the one-way clutch 404 constituting the second clutch in the present invention.
The one-way clutch 404 that forms a part of the torque transmission mechanism 400 is disposed on the inner diameter side of the pulley 30, the outer peripheral surface of the inner shaft portion (clutch inner) 38 that is fixed to the pulley 30, and the drive shaft 32 of the compressor 300. An inner peripheral surface of a hollow shaft portion (clutch outer) 39 fixed to the inner surface, and a sprag 35, a retainer 36 and a spring 37 interposed therebetween. The configuration itself of the sprag 35, the retainer 36 and the spring 37 is the same as that of the one-way clutch 402 as shown in FIG.
[0040]
(Electromagnetic clutch 405)
Next, the electromagnetic clutch 405 constituting the third clutch in the present invention will be described below.
The compressor 300 includes an electromagnetic clutch 405 that forms part of the torque transmission mechanism 400, and the electromagnetic clutch 405 is accommodated on the inner peripheral side of the pulley 27.
[0041]
The electromagnetic clutch 405 is wound around the rotary core 43 that is rotatably supported by the housing of the compressor 300 via bearings 41 and 42, the fixed core 44 that is also fixed to the housing of the compressor 300, and the fixed core 44. The coil 45 and the movable iron piece 46 fixed to the hollow shaft portion 39 of the drive shaft 32 are included, and the rotary core 43 is fixed to the pulley 27. When the coil 45 is energized, the movable iron piece 46 is attracted to the rotating core 43, and the pulley 27 is coupled to the hollow shaft portion 39 of the drive shaft 32 of the compressor 300 through the electromagnetic clutch 405 to drive the compressor 300.
(Description of operation)
When the armature 1 is driven by energization and driven to rotate leftward (rotation in a predetermined direction) as viewed from the pulley side, the planetary gear 10 and the sun inner gear / clutch inner shaft 12 are driven by the rotation of the sun outer gear 9, The sun inner gear / clutch inner shaft 12 outputs a deceleration output by right rotation (rotation in the other direction).
[0042]
Since the right rotation of the sun inner gear / clutch inner shaft 12 is in the direction in which the sprag 19 is raised, the sprag 19 couples the sun inner gear / clutch inner shaft 12 and the clutch outer shaft 15 so that torque can be transmitted. The engine 200 is transmitted to the outer shaft 15 and further transmitted from the pulley 14 for starting the engine via the belt 26 to the pulley 24 of the crankshaft.
[0043]
When the engine 200 is started, the crankshaft pulley 24 and the engine starting pulley 14 rotate clockwise, and the rotational speed thereof exceeds the rotational speed of the sun internal gear / clutch inner shaft 12 driven by the armature 1. The sprag 19 together with the clutch outer shaft 15 slides on the outer peripheral surface of the clutch inner shaft 12, the torque reverse transmission from the engine 200 to the armature 1 is cut off, and then the energization to the motor 100 is stopped. Further, when the engine speed exceeds a predetermined number of revolutions, the centrifugal force acting on the sprag 19 is superior to the biasing force of the spring 21 to the inside of the diameter, and as a result, the sprag 19 that has swung and floated to the outside of the diameter Non-contact separation from the outer peripheral surface of the shaft 12 is performed.
[0044]
During the subsequent driving of the engine, the pulley 24 of the crankshaft rotates the pulley 27 with a built-in electromagnetic clutch through the belt 26, and the compressor 300 is driven by the engine 200 when the electromagnetic clutch 405 is turned on (connected). Of course, when the engine is started, the electromagnetic clutch 405 is turned off (dissociated), and the motor 100 starts only the engine 200.
[0045]
The hollow shaft portion 39 of the drive shaft 32 of the compressor 300 is rotated integrally with the shaft 40 of the compressor 27, but when the electromagnetic clutch 405 is turned on, the sprag 35 is not contacted from the pulley 30 by the same action as the sprag 19. The pulley 30, the belt 31, and the pulley 28 are not rotated.
Further, the left rotation of the armature 1 as viewed from the pulley side at the time of starting the engine causes the pulley 30 to rotate counterclockwise via the pulley 28 and the belt 31, and this relatively rotates the hollow shaft portion 39 of the drive shaft 32. The sprag 35 is separated from the pulley 30 in a non-contact manner by the same action as the sprag 19, and the rotation of the pulley 30 is not transmitted to the drive shaft 32.
[0046]
Next, driving of the compressor 300 when the engine 200 is stopped, such as during idle stop, will be described.
At this time, the armature 1 is driven to rotate rightward (rotation in the other direction) as viewed from the output shaft 16 side by energization, and the sun outer gear 9 rotates rightward to rotate the planetary gear 10 and the sun inner gear / clutch inner shaft 12. Is driven, a deceleration output is output from the sun inner gear / clutch inner shaft 12 in a counterclockwise rotation. At this time, the sprag 19 slides on the outer peripheral surface of the sun inner gear / clutch inner shaft 12, and the rotation of the motor 100 is not transmitted to the pulley 14 for starting the engine.
[0047]
On the other hand, the right rotation (rotation in the other direction) of the armature 1 rotates the pulley 30 of the compressor 300 to the right via the pulley 28 and the belt 31, and the outer peripheral surface of the inner shaft portion 38 of the pulley 30 is sprag 35. Then, the hollow shaft portion 39 of the drive shaft 32 is driven to rotate clockwise. At this time, if the electromagnetic clutch 405 is turned off, the rotational force is not transmitted to the engine side, and the compressor 300 can be driven by the motor 100 when the engine is stopped.
[0048]
The belt and pulley mechanism 403 can be replaced with a sprocket and chain, a gear mechanism, and the like, and the one-way clutches 402 and 404 can be replaced with electromagnetic clutches (friction plate type, electromagnetic outer clutch, etc.).
[0049]
[Example 2]
An auxiliary machine driving apparatus using the starter motor according to the second embodiment will be described below with reference to FIGS. However, components having the same main function as the components of the first embodiment may be denoted by the same reference numerals for easy understanding.
(Constitution)
Since only the torque transmission mechanism 500 of the accessory drive device using this starter motor is substantially different from the torque transmission mechanism 400 of the first embodiment, only the torque transmission mechanism 500 will be described.
[0050]
In the torque transmission mechanism 500, the pulley 28, the belt 31, and the pulley 30 of the torque transmission mechanism 400 of the first embodiment are omitted, and the pulleys 14, 24, 27, and the belt 26 are replaced with pulleys 114, 124, 127, and a belt 126. The one-way clutch 404 is omitted, the one-way clutch (second clutch) 406 having the same function is accommodated in the pulley 114, and the electromagnetic clutch (fourth clutch) 407 is accommodated in the pulley 124 of the engine 200. Is.
[0051]
As shown in FIG. 6, the one-way clutch 406 includes a sprag 135, a retainer 136, and a spring 137 between the outer peripheral surface of the output shaft 116 that forms the clutch inner and the inner peripheral surface of the pulley 114 that forms the clutch outer. Configured.
(Description of operation)
Since the operation when the armature 101 is driven by energization and is driven to rotate counterclockwise as viewed from the pulley side to start the engine 200 is the same as that of the first embodiment, the description thereof is omitted. However, at this time, the one-way clutch 406 is disconnected, the electromagnetic clutch 407 built in the pulley 124 is turned on (coupled), and the electromagnetic clutch 405 for driving the compressor 300 is turned off (dissociated).
[0052]
A case where the compressor 300 is driven by the motor 100 when the engine 200 is stopped will be described below.
At this time, the one-way clutch 402 is disconnected as in the first embodiment.
Further, the right rotation of the output shaft 116 of the armature 1 is transmitted to the pulley 114 via the sprag 135. At this time, the electromagnetic clutch 407 built in the pulley 124 for driving the engine 200 is turned off, and the electromagnetic for driving the compressor 300 is turned off. By turning on the clutch 405, the compressor 300 can be electrically driven.
[0053]
[Example 3]
An auxiliary machine driving apparatus using the starter motor according to the third embodiment will be described below with reference to FIGS. However, components having the same main function as the components of the first embodiment may be denoted by the same reference numerals for easy understanding.
(Constitution)
The auxiliary device driving apparatus using the starter motor is different from the apparatus of the first embodiment in that the compressor 300 is integrated with the motor 100 and the torque transmission mechanism 600 is used instead of the torque transmission mechanism 400.
[0054]
The motor 100 is different from the motor 100 of the first embodiment in that the output shaft 216 is hollowed and the drive shaft 232 of the compressor 300 is passed through the motor 100 in comparison with that of the first embodiment.
Also, a one-way clutch (second clutch) 408 instead of the one-way clutch 404 in the first embodiment is interposed between the output shaft 216 and the drive shaft 232, and instead of the electromagnetic clutch 405 in the first embodiment. The difference is that the electromagnetic clutch 409 is provided in the pulley 214 on the motor side. However, the functions of the one-way clutch 408 and the electromagnetic clutch 409 are the same as the functions of the one-way clutch 404 and the electromagnetic clutch 405 in the first embodiment.
[0055]
Further, the configuration of this apparatus will be supplementarily described below.
An armature 201 of the motor 100 is rotatably supported on a housing 204 by bearings 202 and 203 and has a commutator 205 for supplying electric power. A brush 206 that supplies power to the armature 201, a brush holder 207, and a field core 208 are attached to the housing 204.
[0056]
The sun outer gear 209 of the planetary reduction gear mechanism 401 is attached to the output shaft 216 that constitutes a rotor together with the armature 201, and the planetary gear 210 is meshed with the outer periphery thereof. The planetary gear 210 is rotatably supported by a pin portion 211 fixed to the housing 204 and meshes with the sun inner gear 212. A sun inner gear 212 that also serves as a clutch inner shaft is rotatably supported by a bearing 213, and transmits a deceleration output to the one-way clutch 402.
The one-way clutch 402 will be described. A clutch support housing 240 is fixed to a pin portion 211 provided in the housing 204, and a clutch support shaft 241 is fitted and fixed to the clutch support housing 240. The clutch support shaft 241 is a pulley 214 for starting the engine. The clutch outer shaft 215 to which is fixed is rotatably supported via bearings 217 and 218. A sprag 219, a retainer 220, and a spring 221 are attached from the outer periphery of the sun inner gear / clutch inner shaft 212 and the inner periphery of the clutch outer shaft 215. As shown in FIG. 4, the sprag 219 is designed by shifting the center of gravity G with respect to a point connecting the inner periphery of the hollow shaft portion of the clutch outer shaft 215 and a line connecting the rotation centers. The sprag 219 is accommodated in holes 222 and 223 provided in the retainer 220 and the spring 221, respectively. The spring 221 applies a force to the sprag 219 so as to press the sprag 219 against the outer periphery of the clutch inner shaft 212. The other end of the clutch outer shaft 215 also serves as a rotating core of an ordinary compressor electromagnetic clutch 409, and transmits the rotational force of the engine 200 to the compressor 300 through the movable core 242.
[0057]
The hollow shaft portion 239 of the drive shaft 232 of the compressor 300 constitutes a clutch outer shaft of the one-way clutch 400, and the end portion 238 of the output shaft 216 of the motor 100 constitutes a clutch inner shaft. And a spring 237 (see FIG. 3).
Reference numeral 229 denotes a nut, and the movable core 242 of the electromagnetic clutch 228 is fixed to the end of the driving shaft 232 of the compressor 300 on the pulley 214 side by a nut 229 via a spline or the like.
(Operation)
When the armature 201 is driven to turn counterclockwise when energized, the sun outer gear 209 rotates, the planetary gear 210, the sun inner gear / clutch inner shaft 212 are driven, and the sun inner gear / clutch is driven. A deceleration output is output from the inner shaft 212 by rotating clockwise.
[0058]
The rotation of the sun inner gear / clutch inner shaft 212 is transmitted to the inner periphery of the clutch outer shaft 215 via the sprag 219 when driven by the right rotation when viewed from the pulley side, and the pulley 214 and the pulley 224 of the crankshaft. Then, the starting torque is transmitted to the engine 200 via the belt 226, and the starting is performed.
When the start of the engine 200 is completed, the pulleys 224 and 214 rotate clockwise, and when the rotational speed exceeds the rotational speed of the sun inner gear / clutch inner shaft 212 driven by the armature 201, the clutch outer shaft 215 and The sprag 219 slides on the outer periphery of the clutch inner shaft 212. The armature 201 is stopped after the start of the engine 200 is completed. Next, when the engine speed becomes equal to or higher than a predetermined rotational speed, the centrifugal force acting on the sprag 219 is superior to the pressing force of the spring 221 and floats away from the outer peripheral portion of the clutch inner shaft 212. At the time of starting, the electromagnetic clutch 228 is released, and the sprag 235 slips when the output shaft 216 rotates counterclockwise, so that the drive shaft 232 of the compressor 300 is not driven. While the engine is being driven, the pulley 214 incorporated in the electromagnetic clutch is rotationally driven by the pulley 224 of the engine 200 via the belt 226, and the electromagnetic clutch 409 in the pulley 214 is turned on (coupled) as necessary, so that the compressor 300 is Driven.
[0059]
Next, electric driving of the compressor 300 when the engine is stopped will be described. At this time, the output shaft 216 is driven to rotate clockwise as viewed from the pulley side. As a result, the sun outer gear 209 rotates clockwise, the planetary gear 210 and the sun inner gear / clutch inner shaft 212 are driven, and a deceleration output is output from the sun inner gear / clutch inner shaft 212 in the left rotation. At this time, the sprag 219 slides on the outer peripheral surface of the sun inner gear / clutch inner shaft 212, and the rotation of the motor 100 after deceleration is not transmitted to the pulley 214. At this time, the right rotation of the output shaft 216 is transmitted to the inner periphery of the hollow shaft portion 239 of the drive shaft 232 via the sprag 235, and the compressor 300 is driven. At this time, the electromagnetic clutch 409 is turned off (dissociated), and the motor 100 does not drive the engine 200.
[0060]
[Modification]
A modification of the accessory drive device using the starter motor of the first embodiment will be described below with reference to FIGS. However, components having the same main function as the components of the first embodiment may be denoted by the same reference numerals for easy understanding.
(Constitution)
In the accessory drive device using this starter motor, only the torque transmission mechanism 700 is substantially different from the torque transmission mechanism 400 of the first embodiment, so only the torque transmission mechanism 700 will be described.
[0061]
Since this torque transmission mechanism 700 is characterized in that an eccentric reduction mechanism 410 is used instead of the planetary reduction gear mechanism 401 of the torque transmission mechanism 400 of the first embodiment, only the eccentric reduction mechanism 410 will be described. Of course, the planetary reduction gear mechanism of another embodiment can be replaced with the eccentric reduction mechanism (the reduction mechanism in the present invention) 410.
[0062]
An eccentric ring 309 eccentric to the axis of the motor shaft 324 is fixed to the motor shaft 324, and a gear plate 311 is coaxial with the eccentric ring 309 via a roller bearing 310 on the outer peripheral surface of the eccentric ring 309. It is mounted so that it can rotate freely. Outer teeth 328 are provided on the outer periphery of the gear plate 311, and a part of the outer teeth 328 meshes with the inner teeth 329 of the housing 304. The internal teeth 329 are arranged in a circle around the axis of the motor shaft 324. In this embodiment, the gear plate 311 is set to 25 teeth and the internal tooth 329 is set to a difference of one tooth from 26 teeth, and thereby the reduction ratio is set to 1/25. A total of eight holes 327 are provided in the gear plate 311 so as to be separated from each other by 45 degrees at positions having a constant diameter from the shaft center, and the output from the clutch inner shaft 313 is inserted into the holes 327. A pin 313a is inserted. The output bin 313a has a smaller diameter than the hole 327, and each output pin 313a is always in contact with the inner peripheral surface of the hole 327.
(Operation)
Only the operation of the eccentric speed reduction mechanism 410 will be described below.
[0063]
When the armature 301 is driven to rotate counterclockwise as viewed from the pulley side by energization, the output shaft 324 rotates, and the rotation of the eccentric ring 309 causes the gear plate 311 to move eccentrically. As a result, it is driven to rotate in the opposite direction to the motor shaft 324 decelerated by a part of the gear plate 311. The output is transmitted from the output pin 313 to the clutch inner shaft 313 by rotating clockwise.
[0064]
Reference numeral 411 denotes a one-way clutch that forms a first clutch, and a sprag 317, a retainer 318, and a spring 319 are provided between the outer periphery of the clutch inner shaft 313 and the inner periphery of the clutch outer shaft 315. . A bearing 316 supports the clutch inner shaft 313.
[0065]
[Example 4]
An auxiliary machine driving apparatus using the starter motor according to the fourth embodiment will be described below with reference to FIG.
This embodiment is characterized in that the drive control of the compressor 300 at the time of idling stop is performed using the apparatus of the first embodiment, which will be described with reference to the flowchart of FIG. This control is performed by an electronic control unit (ECU) having a microcomputer configuration, but illustration of the ECU itself is omitted.
[0066]
First, it is determined whether or not the engine should be stopped by detecting whether or not the idling is continued for a predetermined time at an intersection or the like (S100), and if the engine is to be stopped, the engine stop process is executed (S102). ).
Next, it is determined whether or not it is necessary to drive an auxiliary machine (here, a compressor) (S104). Only when necessary, the compressor 300 is electrically driven by rotating the motor 100 in the other direction (S106).
[0067]
Next, it is determined whether or not the auxiliary machine (here, the compressor) needs to be stopped (S108), and the motor 100 that drives the compressor 300 by reverse rotation is stopped only when necessary (S110).
Next, it is checked whether or not the engine 200 needs to be restarted (S112), the engine restart control is performed only when necessary, and then it is checked whether or not the engine speed has exceeded a predetermined speed (S116). If exceeded, it is determined that the engine start has been completed, and the start control of the engine 200 is terminated (S118).
[0068]
As described above, according to the present embodiment, the operation of the auxiliary machine such as the compressor can be continued even when the idling stop is performed, so that the fuel consumption can be improved and the exhaust gas emission amount can be reduced without reducing the driving feeling. Can do.
In this embodiment, S100 and S102 constitute idle stop control means in the present invention, and S104 and S106 constitute compressor control means in the present invention.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an accessory drive device using a starter motor according to a first embodiment.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view taken along line BB in FIG.
4 is an enlarged cross-sectional view of a main part of FIG.
FIG. 5 is a cross-sectional view of an accessory drive device that uses a starter motor according to a second embodiment;
6 is a cross-sectional view taken along the line CC of FIG.
FIG. 7 is a cross-sectional view of an accessory driving device using a starter motor according to a third embodiment.
8 is a cross-sectional view taken along line DD in FIG.
9 is a cross-sectional view of a modified embodiment of Example 1. FIG.
10 is a cross-sectional view taken along line EE in FIG.
11 is a cross-sectional view taken along line FF in FIG. 9;
FIG. 12 is a flowchart showing an operation of an auxiliary machine driving apparatus using the starter motor according to the fourth embodiment.
[Explanation of symbols]
Reference numeral 100 denotes a starter motor (motor), 200 denotes an engine, and 300 denotes a compressor (auxiliary machine). 401 is a planetary reduction gear mechanism (deceleration mechanism),
Example 1
400 is a torque transmission mechanism,
The pulleys 14, 24, 27, and the belt 26 are first torque transmission units,
402 is a one-way clutch (first clutch),
The pulleys 28 and 30, the belt 31 are the second torque transmission unit, the 404 is the second clutch,
405 is the third clutch,
(Example 2)
500 is a torque transmission mechanism,
The pulleys 114, 124, 127 and the belt 126 are torque transmission parts,
402 is a one-way clutch (first clutch),
405 is the fourth clutch,
406 is the second clutch,
407 is the third clutch,
(Example 3)
600 is a torque transmission mechanism,
Pulleys 214 and 224 and belt 226 are torque transmission parts,
402 is a one-way clutch (first clutch),
409 is the third clutch,
408 is the second clutch.

Claims (7)

A motor,
Engine,
An auxiliary machine that is a rotational load;
The transmission of torque from the motor to the auxiliary machine is interrupted when the starting torque is transmitted from the motor rotating in a predetermined direction to the engine, and the auxiliary motor rotates in the other direction when the engine is stopped. Torque transmission from the motor to the engine is interrupted during torque transmission to the machine, and torque transmission from the motor to the auxiliary machine and torque transmission from the engine to the motor during torque transmission from the engine to the auxiliary machine after starting. A torque transmission mechanism for blocking the torque transmission of
Equipped with a,
The torque transmission mechanism is
A reduction mechanism that reverses and decelerates the rotational torque in a predetermined direction output from the output shaft of the motor in the same rotational direction as the rotational torque in the other direction;
The torque transmission mechanism is
A first torque transmission unit that connects the output shaft of the speed reduction mechanism, the crankshaft of the engine, and the drive shaft of the auxiliary machine so as to be able to transmit torque;
A first clutch comprising a one-way clutch that transmits a reverse deceleration torque output from an output shaft of the speed reduction mechanism to the first torque transmission unit;
A second torque transmission portion for connecting the output shaft of the motor and the drive shaft of the auxiliary machine so as to be able to transmit torque;
A second clutch for transmitting torque from the output shaft of the motor to the drive shaft of the auxiliary machine through the second torque transmitting portion;
An auxiliary machine drive device using a starter motor. In the accessory drive apparatus using the starter motor according to claim 1 ,
The torque transmission mechanism is
An auxiliary machine drive device using a starter motor, comprising a third clutch for detachably connecting the first torque transmission section and the drive shaft of the auxiliary machine. In the accessory drive apparatus using the starter motor according to claim 1 ,
The torque transmission mechanism is
A single torque transmission unit that connects the output shaft of the speed reduction mechanism, the crankshaft of the engine, and the drive shaft of the auxiliary machine so as to transmit torque;
A first clutch comprising a one-way clutch that transmits a reverse deceleration torque output from the output shaft of the speed reduction mechanism to the torque transmission unit;
A second clutch for transmitting rotational torque in the other direction output from the output shaft of the motor to the drive shaft of the auxiliary machine through the torque transmission unit;
A third clutch for detachably connecting the torque transmission part and the crankshaft of the engine;
An auxiliary machine drive device using a starter motor. In the auxiliary machine drive device using the starter motor according to claim 3 ,
The torque transmission mechanism is
An auxiliary machine drive device using a starter motor, comprising a fourth clutch for detachably connecting the torque transmission part and the drive shaft of the auxiliary machine. In the accessory drive apparatus using the starter motor according to claim 1 ,
The motor and the auxiliary machine are integrated, the drive shaft of the auxiliary machine is coaxially arranged in the hollow output shaft of the motor,
The torque transmission mechanism is
A single torque transmission unit that connects the output shaft of the speed reduction mechanism, the crankshaft of the engine, and the drive shaft of the auxiliary machine so as to transmit torque;
A first clutch comprising a one-way clutch that transmits a reverse deceleration torque output from the output shaft of the speed reduction mechanism to the torque transmission unit;
A second clutch for transmitting rotational torque in the other direction output from the output shaft of the motor to the drive shaft of the auxiliary machine without passing through the torque transmission unit;
An auxiliary machine drive device using a starter motor. In the accessory drive apparatus using the starter motor according to claim 5 ,
An auxiliary machine drive device using a starter motor, comprising: a third clutch that connects and disconnects the output shaft of the speed reduction mechanism and the torque transmission unit. In the accessory drive device using the starter motor according to any one of claims 1 to 6 ,
The auxiliary drive apparatus using a starter motor, wherein the second clutch comprises a one-way clutch .

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