WO2015068822A1 - 動力伝達装置 - Google Patents
動力伝達装置 Download PDFInfo
- Publication number
- WO2015068822A1 WO2015068822A1 PCT/JP2014/079649 JP2014079649W WO2015068822A1 WO 2015068822 A1 WO2015068822 A1 WO 2015068822A1 JP 2014079649 W JP2014079649 W JP 2014079649W WO 2015068822 A1 WO2015068822 A1 WO 2015068822A1
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- WO
- WIPO (PCT)
- Prior art keywords
- clutch
- transmission device
- power transmission
- axis
- shaft
- Prior art date
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- 238000003825 pressing Methods 0.000 description 27
- 230000009467 reduction Effects 0.000 description 22
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- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/22—Friction clutches with axially-movable clutching members
- F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
- F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
- F16D13/54—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D28/00—Electrically-actuated clutches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/12—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for conveying rotary motion
- F16H21/14—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for conveying rotary motion by means of cranks, eccentrics, or like members fixed to one rotary member and guided along tracks on the other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/348—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having differential means for driving one set of wheels, e.g. the front, at one speed and the other set, e.g. the rear, at a different speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/22—Friction clutches with axially-movable clutching members
- F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
- F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
- F16D2023/123—Clutch actuation by cams, ramps or ball-screw mechanisms
Definitions
- the present invention relates to a power transmission device that transmits torque between two rotating members so that the torque can be cut off. More particularly, the present invention is used in combination with a differential device that distributes torque to an axle of a vehicle, and transmits torque from a propeller shaft to the differential device. It is related with the power transmission device which controls.
- a power transmission device including a clutch may be used, and this may be interposed, for example, between the propeller shaft and the rear differential.
- Patent Document 1 discloses related technology.
- a speed reduction mechanism using a planetary gear is combined with a motor and a cam mechanism.
- rotation by the motor is decelerated (ie, increased) by a speed reduction mechanism, converted into axial motion by a cam mechanism, and the increased pressing force is exerted on the clutch.
- a sufficient pressing force can be exerted on the clutch even with a relatively small output motor.
- the power transmission device that transmits torque in a severable manner between the first rotating member and the second rotating member that are respectively rotatable around the axis is the first rotating member.
- An input member having an eccentric shaft that is eccentric from the shaft, a stationary member that does not move around the shaft, an eccentric motion that engages with the eccentric shaft, and a rotational motion that engages with the fixed member and rotates about the eccentric shaft
- the clutch includes a cam mechanism, a.
- FIG. 1 is a sectional elevation view of a power transmission device according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional side view taken from line II-II in FIG.
- FIG. 3A is a schematic diagram showing the cam mechanism developed on a surface along the circumferential direction.
- FIG. 3B is a side view of the cam mechanism as viewed in the axial direction.
- FIG. 4 is a block diagram of the vehicle according to the present embodiment.
- FIG. 5 is a flowchart showing the operation of each ECU.
- FIG. 6 is a flowchart showing a torque control process according to this embodiment.
- FIG. 7 is a flowchart illustrating a torque control process according to another example.
- FIG. 8 is a sectional elevation view of a cam mechanism according to a modification.
- a vehicle includes a driving force source including an engine 201 and / or a motor / generator 203, a speed change mechanism 205 that shifts rotation by the driving force source, and transmitted torque.
- the front differential 207 is distributed to the right and left front axles 209, and the front wheels 211 are respectively coupled thereto.
- a part of the torque of the driving force source is taken out by the power take-off 213, transmitted to the rear differential 219 via the propeller shaft 217, distributed to the right and left rear axles 221, and the rear wheels 223. Is driven.
- the motor / generator 203 receives electric power from the battery and supplies torque to the vehicle without the engine 201 or together with the engine 201. Further, the motor / generator 203 converts a part of the torque generated by the engine 201 into electric power according to the remaining amount of the battery and charges the battery. In some cases, a generator 215 is added to regenerate the energy when the vehicle decelerates.
- the power transmission device 1 is interposed between the propeller shaft 217 and the rear differential 219 in order to realize part-time four-wheel drive operation, and torque transmission therebetween is controlled.
- the clutch 7 incorporated in the power transmission device 1 When the clutch 7 incorporated in the power transmission device 1 is connected, the power transmission device 1 transmits torque from the propeller shaft 217 to the rear differential 219, and this torque drives the rear wheel 223, so that the vehicle is in a four-wheel drive mode. Drive on.
- the clutch 7 is disconnected, torque is not transmitted to the rear differential 219, only the front wheels 211 are driven, and the vehicle travels in the two-wheel drive mode.
- a plurality of electronic control units can be used to control each mechanism.
- the vehicle includes a main ECU 225 and a power transmission device ECU 227.
- the main ECU 225 is treated as a single unit, but this may also be a group consisting of a plurality of ECUs, each of which individually includes an engine, a transmission, a motor / generator, a brake, and the like. Can be controlled.
- the ECUs can exchange information by so-called CAN communication, for example.
- the main ECU 225 or the power transmission device ECU 227 is connected to a plurality of sensors and receives the signals.
- Each sensor includes, for example, rotation of the engine 201, rotation of the motor / generator 203, rotation of each wheel, accelerator opening, traveling direction and lateral acceleration, yaw rate, temperature in the power transmission device 1, torque of the output shaft,
- Each ECU detects information on each part of the vehicle by detecting the brake, side brake, shift position in the transmission gear, steering angle, oil temperature of each part, outside air temperature, and the like.
- Each ECU selects the collected information, calculates it, compares it with the recording chart, outputs control information to each part of the vehicle based on it, and controls each mechanism.
- the power transmission device ECU 227 receives the output of the temperature sensor and estimates the temperature in the power transmission device 1.
- the power transmission device 1 also includes a torque sensor made up of a resolver that detects torque transmitted to the rear differential 219.
- the power transmission device ECU 227 is also connected to the torque sensor and receives the signal. Further, the power transmission device ECU 227 is connected to each element in the power transmission device 1, for example, the motor (actuator) 9, the speed reduction mechanism 11, and the cam mechanism 13, and collects information from them and controls them to control the clutch 7 Control the operation of
- the main ECU 225 and the power transmission device ECU 227 detect each state in each part through each sensor according to the flowchart shown in FIG. 5 (S1), and input the detected signal to the power transmission device ECU 227 (S2).
- the power transmission device ECU 227 determines a target torque to be transmitted to the rear differential 219, and controls energization to the motor 9 according to the determined target torque (S3).
- the power transmission device ECU 227 determines whether or not the torque input from the torque sensor matches the target torque according to the flowchart shown in FIG. 6 (S7). If not, the operation of the clutch 7 is controlled by changing the energization to the motor 9 until they coincide (S5).
- the main ECU 225 and the power transmission device ECU 227 can execute control based on the target position instead of the target torque in accordance with the flowchart shown in FIG.
- the rotation angle of the motor 9 can be selected as the target position. That is, the target torque is input to the ECU 227 (S4), the target position is calculated from the target torque (S8), the actual position (rotation angle) of the motor 9 is detected (S10), and the actual position and the target position are determined.
- the operation of the clutch 7 is controlled by changing the energization to the motor 9 until they match (S11).
- the power transmission device 1 can control the distribution of torque to the front and rear wheels.
- the drive mode is selected and the torque distribution is controlled in accordance with the road surface state and the vehicle traveling state, so that stable traveling and improved fuel efficiency are realized.
- the details of the power transmission device 1 will be described mainly with reference to FIG.
- the power transmission device 1 can cut the torque between a first rotating member (for example, the propeller shaft 217) and a second rotating member (for example, a gear that transmits torque to the rear differential 219) that can rotate about the axis C1. To communicate.
- a first rotating member for example, the propeller shaft 217
- a second rotating member for example, a gear that transmits torque to the rear differential 219
- the power transmission device 1 generally includes a clutch 7, a motor 9, a speed reduction mechanism 11, and a cam mechanism 13, all of which are housed in a casing 6 for use.
- the motor 9 is a source that exerts a pressing force on the clutch 7, and the rotation of the motor 9 is decelerated (that is, increased) by the speed reduction mechanism 11, and this rotational motion is converted into an axial motion by the cam mechanism 13. The increased pressing force reaches the clutch 7.
- the clutch 7 includes a clutch drum 3 coupled to the first rotating member and a clutch hub 5 coupled to the second rotating member, which are coaxial and can rotate about the axis C1.
- the clutch hub 5 at least partially enters the clutch drum 3, and a clutch plate extending from both sides overlaps to constitute a multi-plate clutch.
- a clutch plate extending from both sides overlaps to constitute a multi-plate clutch.
- another type of clutch such as a cone clutch may be employed.
- a spline 45 is preferably formed on the inner surface of the clutch drum 3, and a plurality of outer clutch plates 46 are engaged therewith.
- a spline 61 is formed on the outer surface of the clutch hub 5, and a plurality of inner clutch plates 62 are engaged therewith.
- the outer clutch plates 46 and the inner clutch plates 62 are alternately arranged.
- the clutch drum 3 extends from the portion overlapping the clutch hub 5 in the axial direction (to the left in the figure) and faces the opening of the casing 6, and is used for coupling with the propeller shaft 217 and the like.
- the extended portion is radially thickened and has a plurality of tap holes 47.
- the clutch drum 3 is preferably rotatably supported by a bearing 31 supported on the inner surface of the casing 6 in the extended portion.
- the clutch drum 3 is further rotatably supported by the bearing 33 at an appropriate position away from the bearing 31 in the axial direction.
- the bearing 33 may be supported on the inner surface of the casing 6, but is preferably supported by the speed reduction mechanism 11, particularly by the fixing member 21. Such a structure is advantageous not only in saving space but also in that the axis alignment between the clutch 7 and the speed reduction mechanism 11 is easy.
- An adapter 4 may be interposed between the bearing 33 and the clutch drum 3 or the speed reduction mechanism 11.
- the clutch hub 5 extends in the opposite direction to the clutch drum 3 to form a shaft, and its end faces the opening of the casing 6. This opening is an opening opposite to the opening that the clutch drum 3 faces. This end is used for coupling with the rear differential 219 and the like, and has a structure for coupling such as a spline 59 on the inner surface thereof.
- the clutch hub 5 preferably has a hollow cylindrical shape, which contributes to weight reduction.
- the clutch hub 5 is preferably rotatably supported by a bearing 49 supported on the inner surface of the clutch drum 3 in the vicinity of one end thereof, and in the vicinity of the opposite end of the speed reduction mechanism 11, particularly in the input member 17. Supported. Between them, for example, a needle bearing 51 is interposed.
- This structure is advantageous not only in saving space but also in that the axis alignment between the clutch 7 and the speed reduction mechanism 11 is easy. In particular, if the clutch drum 3 and the clutch hub 5 are both supported by the speed reduction mechanism 11, the alignment between the three members becomes extremely easy.
- the motor 9 includes a stator 63, a rotor 65 that rotates with respect to the stator 63, and a coil 69 that electromagnetically drives the rotor 65.
- the wiring of the coil 69 is drawn to the outside through the connector 79 and connected to the power source.
- the wiring is also connected to the power transmission device ECU 227, and the rotation of the rotor 65 is controlled by receiving the control.
- the entire motor 9 is accommodated in a motor housing 67 and a cover body 73 covering the motor housing 67, and the stator 63 is fixedly supported by these.
- both have a structure coaxial with the axis C1, but at least the rotor 65 may be coaxial with the axis C1 and can rotate around the axis C1.
- the motor housing 67 is press-fitted into the casing 6, and the entire motor 9 is fixed to the casing 6.
- the speed reduction mechanism 11 is generally associated with an input member 17 that can rotate about an axis C1, a fixing member 21 that does not move around the axis C1, an intermediate member 25 that is rotatably fitted to the fixing member 21, and an intermediate member 25. And a combined output member 29.
- the input member 17 is coupled to the rotor 65 and receives its rotation, and the output member 29 outputs the decelerated rotation to the cam mechanism 13.
- the input member 17 has a structure similar to a cylinder, and is coupled to the rotor 65 and is rotatable around the axis C1.
- the bearing 81 and the bearing 83 preferably support the input member 17, the bearing 83 may be supported by the motor housing 67, and the bearing 81 may be supported by the cover body 73.
- the input member 17 is a cylinder that is symmetrical with respect to the axis C1 in the vicinity of the portion that is coupled to the rotor 65, but extends from there in the direction of the clutch 7, and this portion is an eccentric shaft 15 that is eccentric from the axis C1. 1 and 2, C2 represents the center of the eccentric shaft 15, and the axis C2 is offset from the axis C1 by a deviation ⁇ c.
- the eccentric shaft 15 and the axis C2 eccentrically move about the axis C1.
- the fixing member 21 has a round pan-like structure symmetric with respect to the axis C1, and is preferably fixed to the motor 9 so as not to move around the axis C1.
- one or more bolts 71 that pass through the motor housing 67 and are fastened to the fixing member 21 may be used.
- Such a structure enables a manufacturing procedure in which the motor 9 is manufactured in advance, and the speed reduction mechanism 11 is later connected to the motor 9 by the bolt 71 and then the whole is connected to the clutch 7.
- the fixing member 21 has a structure for meshing with the intermediate member 25 on its inner periphery, and an example thereof is an internal gear 19.
- the intermediate member 25 has a structure similar to a disk, and engages with the eccentric shaft 15 at the center thereof to make an eccentric motion together. Further, a bearing 85, for example, is interposed between the intermediate member 25 and the eccentric shaft 15, so that they can rotate with each other.
- the intermediate member 25 has a structure for meshing with the fixing member 21 on its outer periphery, and an example thereof is an external gear 23. Since the intermediate member 25 is eccentrically moved together with the eccentric shaft 15 while meshing with the fixed member 21, it can be rotated around the axis C2. If the number of teeth of the internal gear 19 and the number of teeth of the external gear 23 are the same, no rotational motion occurs, so these are different numbers. Preferably, the number of teeth of the internal gear 19 can be one or more than the number of teeth of the external gear 23.
- the tooth profile of the internal gear 19 and the external gear 23 may be any of an involute tooth profile, a cycloid tooth profile, an arc tooth profile, or an epitrochoid parallel curve.
- the output member 29 also has a structure similar to a cylinder, and is rotatably supported by the fixing member 21 on its outer peripheral surface, for example. Such support may be by sliding against each other or a bearing may be interposed.
- the output member 29 is engaged with the intermediate member 25 at one end thereof.
- the intermediate member 25 and the output member 29 are provided with an engaging portion 27.
- the engagement portion 27 includes, for example, a plurality of engagement holes 87 formed on the circumference of the intermediate member 25 around the axis C2, and a plurality of engagement pins 89 protruding from the output member 29 correspondingly.
- Each engagement hole 87 may be a bottomed hole or a through hole.
- each engagement hole 87 is larger than each engagement pin 89.
- a sliding bush or a bearing may be interposed.
- the output member 29 can be provided with a structure, for example, a spline 91, which is an end opposite to the engagement pin 89 and is engaged with a cam follower 93 described later.
- the cam mechanism 13 is interposed between the output member 29 and the clutch 7.
- the cam mechanism 13 is generally composed of a cam disk 90 and a cam follower 93, and a mediating member such as a cam ball 95 may be interposed therebetween.
- the cam follower 93 includes a pressing surface 97 for pressing the clutch 7.
- the cam mechanism 13 converts the rotational movement of the output member 29 into an axial movement, so that the pressing surface 97 presses the clutch 7.
- the cam disk 90 and the cam follower 93 are annular members facing each other.
- One or both of these includes a plurality of cam surfaces 105 that incline along the circumferential direction and gradually become shallower.
- the cam disk 90 rotates, the non-rotatable cam follower 93 is pushed out along the slope by the cam surface 105, so that the rotational motion is converted into an axial motion.
- the cam surfaces 105 are rotationally symmetric with respect to the axis C1 so that the forces acting on the cam mechanism 13 are axially symmetric.
- Each cam surface 105 may be composed of a steeper first slope 107 and a more gentle second slope 109 continuously.
- stroke ratio the ratio of the distance of the axial movement to the distance of the rotational movement
- the cam ball 95 In the initial state, the cam ball 95 is settled on the bottom of the first slope 107.
- the cam ball 95 When the output member 29 transmits the rotation to the cam mechanism 13, the cam ball 95 first climbs the steeper first slope 107, and the cam follower 93 moves in the axial direction with a relatively large stroke ratio. .
- Such a configuration generates a relatively small pressing force, but rapidly moves the pressing surface 97 toward the clutch 7. Since a large pressing force is not required until the pressing surface 97 abuts against the clutch 7, it is suitable for this stage.
- the cam ball 95 climbs the gentler second slope 109, and the cam follower 93 moves in the axial direction with a relatively small stroke ratio.
- Such a configuration is suitable for a stage in which a relatively large pressing force is generated and a large pressing force is required after the pressing surface 97 contacts the clutch 7.
- the cam disk 90 is fixed to the fixing member 21 or is integrated therewith.
- the cam follower 93 engages with the output member 29 and rotates together with the output member 29, but is slidable in the axial direction.
- the cam follower 93 moves in the axial direction by the rotation, and the pressing surface 97 presses the clutch 7.
- a pressing body 99 may be interposed between the pressing surface 97 and the clutch 7, and a thrust bearing 101 may be further interposed to allow relative rotation.
- a return spring 103 may be interposed between the clutch 7 and the pressing surface 97 or the pressing body 99 in order to return the cam follower 93 to the initial position.
- the cam disk 90 may be fixed to the output member 29 or may be integrated therewith.
- the cam follower 93 may engage with the fixed member 21 and thus move in the direction along the axis C1, but may not move around the axis C1.
- the cam disk 90 is rotated by the output member 29, the cam follower 93 moves in the axial direction due to the rotation, and the pressing surface 97 presses the clutch 7.
- the casing 6 has a structure similar to a cylinder and is open at both ends in the axial direction as described above.
- the first opening allows access to the clutch drum 3, and the second opening allows access to the clutch hub 5.
- the casing 6 forms a part of the vehicle body side casing 35 by fixing with the bolts 8 and does not move around the axis C1.
- the motor 9 is arranged to face the second opening.
- the motor 9 is relatively heavy among the components, and since the motor 9 is close to the second opening that is fixed by the bolt 8, it can be firmly supported, and is advantageous in that vibration can be prevented. is there.
- the power transmission device 1 further includes several structures for blocking the inside of the casing 6 from the outside.
- the clutch drum 3 may include a wall that closes the inside thereof.
- the wall may be provided with a through hole 41. After the injection, the through hole 41 is preferably closed by press-fitting a check ball 43.
- the clutch hub 5 may include a partition wall 53 that closes the inside.
- the seal member 37 may be interposed between the clutch drum 3 and the casing 6 so as to be in contact with both of them, and the gap between them may be closed.
- a dust cover 39 preferably covers the seal member 37.
- a seal member 57 may be interposed between the clutch hub 5 and the motor housing 67 so as to come into contact with both.
- a seal member 75 such as an O-ring may be interposed between the motor housing 67 and the casing 6, and a seal member 77 such as an O-ring is interposed between the motor housing 67 and the cover body 73. It may be.
- the power transmission device 1 Due to the structure as described above, foreign matter does not enter the power transmission device 1 from the outside, and internal lubricating oil does not leak to the outside or mix with other external lubricating oil.
- the power transmission device 1 can be handled independently of the external structure.
- the power transmission device 1 has a structure that promotes circulation of the lubricating oil inside the casing 6.
- the clutch hub 5 may be provided with a plurality of lubricating holes 55 penetrating the clutch hub 5 in the radial direction.
- the clutch hub 5 is connected to the rear differential 219, and is always rotated following the rear wheel 223 as long as the vehicle travels. Lubricating oil is discharged through the lubrication hole 55 by the centrifugal force due to such rotation, and each part of the power transmission device 1 is lubricated.
- the clutch drum 3 is coupled to the propeller shaft 217 and the clutch hub 5 is coupled to the rear differential 219.
- the power transmission device 1 can also be utilized for the intermittent connection of the power between other shafts.
- the rotation of the motor 9 is decelerated using the rotational motion generated by the eccentric movement together with the eccentric shaft 15 while the intermediate member 25 is engaged with the fixed member 21, an extremely large reduction ratio is realized. it can.
- the reduction ratio is determined by the difference between the number of teeth and the number of teeth. For example, when the number of teeth of the internal gear 19 is 50 and the number of teeth of the external gear 23 is 49, the output member 29 remains at 1/50 rotation while the motor 9 rotates once.
- the power transmission device 1 can connect the clutch 7 with a large pressing force even when the low-output motor 9 is used. Further, since the pressing force is generated using the gently inclined cam surface, the pressing force can be gradually increased or decreased. That is, since the controllability of the pressing force is high, the operation for controlling the distribution of torque to the front and rear wheels as described above is easy.
- a complicated gear mechanism is not required to obtain a large reduction ratio, and the structure can be shortened particularly in the axial direction.
- a large space is not required in the vehicle for mounting the power transmission device 1.
- the increase in weight is slight, which is advantageous in terms of fuel saving.
- the power transmission device 1 according to the present embodiment is easy to handle.
- the driving force transmission device 1 is provided at the rear stage of the propeller shaft 217.
- the driving force transmission device 1 is provided at the power take-off 213 and interposed between the shaft drawn from the transmission and the propeller shaft 217.
- the torque transmission may be controlled.
- it may be interposed between any of the wheels and the axle, and torque transmission therebetween may be controlled.
- it may be provided at a portion branched into the main drive path and the sub drive path, and torque transmission between them may be controlled.
- the reduction mechanism 11 can be connected in two or more stages in series.
- a small-sized power transmission device with excellent controllability of clutch pressing force is provided.
Abstract
Description
Claims (7)
- 軸周りにそれぞれ回転可能な第1の回転部材と第2の回転部材との間で、トルクを切断可能に伝達する動力伝達装置であって、
前記第1の回転部材と前記第2の回転部材とを切断可能に駆動的に結合するクラッチと、
前記軸周りに回転可能なロータを備えたモータと、
前記ロータと結合して前記軸周りに回転可能であって、前記軸から偏心した偏心軸を備えた入力部材と、
前記軸周りに不動な固定部材と、
前記偏心軸に嵌合して偏心運動し、前記固定部材に噛合して前記偏心軸周りの回転運動を生じる、中間部材と、
前記軸周りに回転可能であって、前記中間部材に係合して従動する出力部材と、
前記出力部材と前記クラッチとの間に介在し、前記出力部材の回転運動を前記軸方向の運動に変換して前記クラッチを押圧するカム機構と、
を備えた動力伝達装置。 - 請求項1の動力伝達装置であって、前記固定部材は第1の歯数を有した内歯歯車を備え、前記中間部材は前記内歯歯車と噛合し前記第1の歯数より少ない第2の歯数を有する外歯歯車を備え、以って前記中間部材が前記固定部材に噛合する、動力伝達装置。
- 請求項1の動力伝達装置であって、前記カム機構は、
前記固定部材と前記出力部材とよりなる群より選択された一方に結合し、または前記一方と一体を成す、カムディスクと、
前記固定部材と前記出力部材とよりなる群より選択された他方に前記軸方向に移動可能に係合し、前記カムディスクに駆動されて前記軸方向に運動して前記クラッチを押圧するカム従動部と、を備えた動力伝達装置。 - 請求項1の動力伝達装置であって、前記クラッチは、前記第1の回転部材に結合可能なクラッチドラムと、前記第2の回転部材に結合可能であって、少なくとも部分的に前記クラッチドラム内に配置されたクラッチハブと、を備えた動力伝達装置。
- 請求項4の動力伝達装置であって、前記クラッチドラムおよび前記入力部材は、前記クラッチハブを回転可能に支持する、動力伝達装置。
- 請求項4の動力伝達装置であって、前記固定部材は、前記クラッチドラムを回転可能に支持する、動力伝達装置。
- 請求項4の動力伝達装置であって、
前記軸周りに不動であって、少なくとも前記クラッチと前記モータとを収容し、前記クラッチドラムへアクセスすることを許容するべく前記軸方向に開口した第1の開口と、前記クラッチハブへアクセスすることを許容するべく前記軸方向に開口した第2の開口とを有するケーシングをさらに備え、
前記モータは前記第2の開口に臨むべく配置されている、動力伝達装置。
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CN201480060941.2A CN105705816B (zh) | 2013-11-08 | 2014-11-07 | 动力传递装置 |
JP2015546706A JP6200515B2 (ja) | 2013-11-08 | 2014-11-07 | 動力伝達装置 |
EP14860626.2A EP3067583B1 (en) | 2013-11-08 | 2014-11-07 | Power transmission device |
US15/140,814 US9534663B2 (en) | 2013-11-08 | 2016-04-28 | Transmission device |
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US15/140,814 Continuation US9534663B2 (en) | 2013-11-08 | 2016-04-28 | Transmission device |
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PCT/JP2014/079649 WO2015068822A1 (ja) | 2013-11-08 | 2014-11-07 | 動力伝達装置 |
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Also Published As
Publication number | Publication date |
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EP3067583A1 (en) | 2016-09-14 |
US20160238107A1 (en) | 2016-08-18 |
WO2015068821A1 (ja) | 2015-05-14 |
JPWO2015068822A1 (ja) | 2017-03-09 |
JP6200515B2 (ja) | 2017-09-20 |
EP3067583B1 (en) | 2019-03-13 |
US9534663B2 (en) | 2017-01-03 |
CN105705816B (zh) | 2018-03-20 |
EP3067583A4 (en) | 2017-06-14 |
CN105705816A (zh) | 2016-06-22 |
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