WO2014168092A1 - Dispositif d'entraînement de moteur-roue - Google Patents

Dispositif d'entraînement de moteur-roue Download PDF

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Publication number
WO2014168092A1
WO2014168092A1 PCT/JP2014/059988 JP2014059988W WO2014168092A1 WO 2014168092 A1 WO2014168092 A1 WO 2014168092A1 JP 2014059988 W JP2014059988 W JP 2014059988W WO 2014168092 A1 WO2014168092 A1 WO 2014168092A1
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WO
WIPO (PCT)
Prior art keywords
lubricating oil
oil
wheel
drive device
motor drive
Prior art date
Application number
PCT/JP2014/059988
Other languages
English (en)
Japanese (ja)
Inventor
黒田優
山田航
鈴木健一
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Ntn株式会社
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Filing date
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Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2014168092A1 publication Critical patent/WO2014168092A1/fr

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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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0447—Control of lubricant levels, e.g. lubricant level control dependent on temperature
    • F16H57/0449—Sensors or indicators for controlling the fluid level
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M11/12—Indicating devices; Other safety devices concerning lubricant level
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0482—Gearings with gears having orbital motion
    • F16H57/0486—Gearings with gears having orbital motion with fixed gear ratio

Definitions

  • the present invention relates to an in-wheel motor driving device used for driving wheels of, for example, an electric vehicle.
  • Patent Document 1 In an in-wheel motor drive device, a technique has been proposed in which a pump for circulating lubricating oil is arranged in the middle of a lubricating oil path (Patent Document 1).
  • a mechanism for detecting the amount of lubricating oil is not disclosed.
  • a so-called float type oil amount detecting mechanism may be provided in the lubricating oil reservoir.
  • the amount of lubricating oil is smaller than that of a general internal combustion engine in order to reduce the unsprung weight while reducing the size. For this reason, in the conventional in-wheel motor drive device, when the amount of lubricating oil decreases excessively during operation and the lubrication of each part is not sufficiently performed, wear or abnormal heat generation may occur in each part. .
  • An object of the present invention is to provide an in-wheel motor drive device that can make the in-wheel motor drive device compact and can easily detect the amount of lubricating oil.
  • An in-wheel motor drive device includes an electric motor that drives a wheel, a wheel bearing that supports the wheel, and a speed reducer that decelerates the rotation of the electric motor and transmits the rotation to the wheel bearing.
  • a lubricating oil storage unit that stores lubricating oil
  • a lubricating oil supply unit that supplies the lubricating oil stored in the lubricating oil storage unit to the speed reducer and returns the lubricating oil
  • An oil amount detection sensor is provided at the lowermost portion to detect the amount of lubricating oil.
  • the lubricating oil is temporarily stored in the lubricating oil reservoir.
  • the lubricating oil supply means supplies the lubricating oil stored in the lubricating oil storage unit to the reduction gear.
  • the oil amount detection sensor is provided at the lowermost portion of the lubricating oil reservoir, even if the oil amount is excessively reduced, the oil amount can be detected accurately and easily.
  • the driver can recognize that fact and take necessary measures such as towing the vehicle and moving it to a repair shop or the like.
  • the oil level detection sensor can be easily installed, for example, in the drain plug at the bottom of the lubricating oil reservoir, the in-wheel motor drive device can be made more compact and the unsprung weight can be reduced while improving versatility. Can do.
  • the oil amount detection sensor may be a pressure sensor or a weight sensor.
  • the relationship between the amount of lubricating oil and the pressure or weight is stored in, for example, a table, and the amount of oil is calculated by comparing the detected value detected by the pressure sensor or weight sensor with the table. Accordingly, it is not necessary to store a relatively large mechanism such as a float type oil amount detection mechanism in the lubricating oil reservoir, and the apparatus can be prevented from being enlarged. In addition, the amount of lubricating oil in the lubricating oil reservoir can be easily detected.
  • the pressure sensor is one of an electronic control unit that performs overall control of the entire vehicle and a motor control device that controls the electric motor via a signal line. It may be connected to.
  • the electric motor has a sensor for detecting a rotation angle of a rotor, and a signal line connected to the pressure sensor, the electronic control unit, and the motor control device is coaxial with a connection cable of the sensor of the electric motor. It may be arranged. You may provide a connection part in the longitudinal direction middle part of the signal wire
  • the lubricating oil supply means is provided along a lubricating oil flow path provided in a motor housing of the electric motor and a shaft center in a motor rotating shaft of the electric motor, and is connected to the lubricating oil flow path.
  • An oil path, a speed reducer oil path that is provided in the speed reducer communicates with the motor rotation shaft oil path and the lubricating oil reservoir, and supplies lubricating oil to the speed reducer, and is stored in the lubricating oil reservoir.
  • An axial oil supply mechanism having a pump that sucks up the lubricating oil and circulates it through the lubricating oil flow path to the motor rotation shaft flow path and the speed reducer oil path may be used.
  • the lubricating oil is forcibly circulated by the pump through the lubricating oil passage to the motor rotation shaft passage and the speed reducer oil passage. Thereby, lubricating oil can be stably supplied over the whole reduction gear.
  • an arithmetic means for measuring the oil amount of the lubricating oil in the lubricating oil reservoir part a plurality of times by the oil amount detection sensor for a predetermined fixed time and calculating an average value thereof.
  • the “determined fixed time” can be appropriately determined by a test, simulation, or the like.
  • the calculating means can stably determine the oil amount of the lubricating oil by calculating an average value of the oil amounts measured a plurality of times by the oil amount detection sensor in a certain time.
  • the lubricating oil reservoir may have a mortar-shaped bottom, and the oil amount detection sensor may be provided at the bottom of the mortar-shaped bottom.
  • the lubricating oil stored in the lubricating oil storage part flows into the lowermost part of the mortar-shaped bottom by the weight of the lubricating oil. For this reason, the amount of lubricating oil can be detected stably.
  • An abnormality reporting means is provided for outputting abnormality information of the lubricating oil supply means when the oil amount detected by the oil amount detection sensor deviates from a predetermined setting range when the vehicle is stopped when the vehicle is powered on. May be.
  • the abnormality information of the lubricating oil supply means is output by the abnormality reporting means, the vehicle driver recognizes that fact and takes necessary measures such as towing the vehicle and moving it to a repair shop, for example. Can do. Thereby, abnormalities, such as excessive wear of a reduction gear, can be prevented beforehand.
  • You may provide the said oil amount detection sensor in all the in-wheel motor drive devices mounted in a vehicle, respectively.
  • One or both of a warning display means for receiving a visually checkable warning and a voice output means for outputting sound may be provided in response to the abnormality information output from the abnormality report means.
  • output limiting means for limiting the motor torque and the rotation speed of the electric motor may be provided.
  • the output restricting means restricts the output of the electric motor when the detected oil amount is out of the predetermined setting range, thereby preventing the lubricating oil from being insufficiently supplied. Abnormalities such as excessive wear can be prevented.
  • the output limiting means may be configured to gradually decrease the motor torque of the electric motor and stop driving the electric motor when the oil amount detected by the oil amount detection sensor is out of a predetermined setting range. good.
  • the in-wheel motor drive device includes an electric motor 1 that drives wheels, a speed reducer 2 that decelerates the rotation of the electric motor 1, and an output that is coaxial with the input shaft 3 of the speed reducer 2.
  • a wheel bearing 5 rotated by the member 4 and a lubricating oil supply means Jk are provided.
  • the reduction gear 2 is interposed between the wheel bearing 5 and the electric motor 1, and the wheel hub, which is a driving wheel supported by the wheel bearing 5, and the motor rotating shaft 6 of the electric motor 1 are coaxially arranged. It is connected.
  • a suspension (not shown) in the vehicle is connected to the reduction gear housing 7 that houses the reduction gear 2.
  • the side closer to the outside in the vehicle width direction of the vehicle with the in-wheel motor drive device supported by the vehicle is called the outboard side, and the side closer to the center of the vehicle is called the inboard side. .
  • the electric motor 1 is a radial gap type IPM motor (so-called embedded magnet type synchronous motor) in which a radial gap is provided between a motor stator 9 fixed to a motor housing 8 and a motor rotor 10 attached to the motor rotating shaft 6. .
  • the motor housing 8 is provided with bearings 11 and 12 spaced apart in the axial direction, and the motor rotating shaft 6 is rotatably supported by the bearings 11 and 12.
  • the motor rotating shaft 6 transmits the driving force of the electric motor 1 to the speed reducer 2.
  • a flange portion 6 a extending radially outward is provided in the vicinity of the intermediate portion in the axial direction of the motor rotating shaft 6, and the motor rotor 10 is attached to the flange portion 6 a via a rotor fixing member 13.
  • the input shaft 3 of the speed reducer 2 has one axial end extending into the motor rotating shaft 6 and is splined to the motor rotating shaft 6.
  • a bearing 14a is fitted in the cup portion 4a of the output member 4, and a bearing 14b is fitted in a cylindrical connecting member 26 connected to the cup portion 4a via an inner pin 22.
  • the input shaft 3 is rotatably supported by these bearings 14a and 14b. Therefore, the input shaft 3 and the motor rotating shaft 6 of the speed reducer 2 are supported by the bearings 11, 12, 14a, and 14b so as to be integrally rotatable.
  • Eccentric portions 15 and 16 are provided on the outer peripheral surface of the input shaft 3 in the speed reducer housing 7. These eccentric portions 15 and 16 are provided with a 180 ° phase shift so that the centrifugal force due to the eccentric motion is canceled out from each other.
  • the reduction gear 2 may have a reduction ratio of 6 or more, for example.
  • the speed reducer 2 is a cycloid speed reducer including an inner housing Ih, curved plates 17 and 18, a plurality of outer pins 19, a motion conversion mechanism 20, and a counterweight 21.
  • the curved plates 17 and 18 are curved (waveform) shapes whose outer periphery curves alternately inward and outward in the radial direction, and are respectively provided rotatably in the eccentric portions 15 and 16.
  • An inner housing Ih is connected to the reducer housing 7, and the output member 4 and the connecting member 26 are rotatably supported on the inner periphery of the inner housing Ih via bearings 27a and 27b.
  • the inner housing Ih is provided with a plurality of outer pins 19 at regular intervals in the circumferential direction via needle roller bearings.
  • the outer periphery of the curved plates 17 and 18 is configured to be able to make rolling contact with these outer pins 19.
  • the corrugated portions on the outer periphery of the curved plates 17 and 18 and the respective outer pins 19 engage with each other to cause the curved plates 17 and 18 to rotate. Yes.
  • the motion conversion mechanism 20 is a mechanism that transmits the rotational motion of the curved plates 17 and 18 to the output member 4.
  • the motion conversion mechanism 20 includes a plurality of inner pins 22 provided in the output member 4 and through holes provided in the curved plates 17 and 18.
  • the plurality of inner pins 22 are arranged at equal intervals in the circumferential direction around the rotation axis of the output member 4.
  • Counterweights 21 and 21 are provided at axial positions adjacent to the eccentric portions 15 and 16 of the input shaft 3 of the speed reducer 2, respectively.
  • the wheel bearing 5 includes an outer member 23 having a double-row raceway surface formed on the inner periphery, an inner member 24 having a raceway surface facing the respective raceway surfaces on the outer periphery, and the outer member 23 and the inner member. And the double row rolling elements 25 interposed between the raceway surfaces of the side members 24.
  • the inner member 24 also serves as a hub for mounting the drive wheel.
  • the wheel bearing 5 is a double-row angular ball bearing, and the rolling elements 25 are formed of balls and are held by a cage for each row.
  • the outer member 23 is a stationary raceway and has a flange attached to the end of the reducer housing 7 on the outboard side.
  • Lubricating oil supply means Jk is an axial oil supply mechanism that supplies lubricating oil used for both the lubrication of the speed reducer 2 and the cooling of the electric motor 1.
  • the lubricating oil supply means Jk includes a lubricating oil passage 30, a motor rotation shaft oil passage 32, a reduction gear oil passage 31, and a pump 28.
  • the lubricating oil passage 30 is provided in the motor housing 8, and the motor rotation shaft oil passage 32 is provided along the axis within the motor rotation shaft 6 of the electric motor 1 and communicates with the lubricating oil passage 30.
  • the speed reducer oil path 31 is provided in the speed reducer 2 and communicates with the motor rotation shaft oil path 32 and the lubricating oil reservoir 29 to supply the lubricating oil to the speed reducer 2.
  • the reduction gear oil passage 31 has an input shaft oil passage 36, an oil supply port 37, and an oil discharge port 38.
  • the input shaft oil passage 36 communicates with the motor rotation shaft oil passage 32 and extends in the axial direction from the inboard side end inside the input shaft 3 to the outboard side.
  • the oil supply port 37 extends radially outward from the axial position where the eccentric portions 15 and 16 are provided in the input shaft oil passage 36.
  • the reduction gear housing 7 is provided with an oil discharge port 38 for discharging the lubricating oil used for lubricating the reduction gear 2 to the lubricating oil reservoir 29.
  • the pump 28 sucks up the lubricating oil stored in the lubricating oil reservoir 29 from the suction port 29b in the lubricating oil reservoir 29 and passes through the lubricating oil passage 30 to the motor rotation shaft oil passage 32 and the speed reducer oil passage 31.
  • the pump 28 has, for example, an inner rotor (not shown) that rotates by rotation of the output member 4, an outer rotor that rotates following rotation of the inner rotor, a pump chamber, a suction port, and a discharge port. It is a cycloid pump.
  • the inner rotor When the inner rotor is rotated by the rotation of the inner member 24, the outer rotor is driven to rotate. At this time, the inner rotor and the outer rotor rotate about different rotation centers, so that the volume of the pump chamber changes continuously.
  • the lubricating oil stored in the lubricating oil storage unit 29 is sucked up, flows in from the suction port, and is pumped to the lubricating oil flow path 30 from the discharge port.
  • the lubricating oil is guided from the lubricating oil passage 30 to the motor rotation shaft oil passage 32.
  • a part of the lubricating oil is led from the motor rotation shaft oil passage 32 to the annular gap ⁇ 1 through the through hole 6b of the motor rotation shaft 6 to be used for cooling the electric motor 1.
  • the lubricating oil used for this cooling is discharged from the slit between the flange of the rotor fixing member 13 and both end faces of the motor rotor 10, moves downward by centrifugal force and gravity, and falls to the lower part of the motor housing 8. Thereafter, the oil is stored in the lubricating oil reservoir 29 that communicates with the lower portion of the motor housing 8.
  • the lubricating oil introduced from the motor rotation shaft oil passage 32 to the oil supply port 37 lubricates the inside of the speed reducer 2. That is, the centrifugal force acts on the lubricating oil discharged from the outer diameter side opening end of the oil supply port 37, so that the lubricating oil lubricates each part in the speed reducer 2 while radially outside the speed reducer housing 7. Move towards. Thereafter, the lubricating oil moves downward due to gravity and is stored in the lubricating oil reservoir 29 from the oil discharge port 38.
  • FIG. 2 is an enlarged cross-sectional view of the lubricating oil reservoir of this in-wheel motor drive device.
  • the lubricating oil reservoir 29 is a so-called oil tank provided in the lower part of the speed reducer housing 7.
  • the lubricating oil reservoir 29 is filled with the lubricating oil in a full state (initial oil amount height indicated by an arrow).
  • the bottom 29a of the lubricating oil reservoir 29 is provided in a mortar shape having a smaller diameter as it goes downward, and a drain plug 39 and an oil amount detection sensor 40 are provided at the bottom of the mortar-shaped bottom 29a.
  • an oil amount detection sensor 40 for detecting the oil amount of the lubricating oil is fitted into the tip end portion of the drain plug 39 exposed in the lubricating oil reservoir 29.
  • the pressure sensor 40 includes, for example, at least one of a diaphragm, a bellows, a capacitive pressure sensor, a semiconductor pressure sensor, and a piezoelectric pressure sensor.
  • the diaphragm is a thin disk with a fixed outer peripheral edge, and lubricating oil acts on the disk. Accordingly, the disk is elastically deformed in proportion to the pressure difference between the one surface and the other surface of the disk, and the pressure can be detected from the magnitude of the deformation. When the disk is relatively elastically deformed, the pressure can be converted into an electric signal using various displacement sensors.
  • the magnitude of the disk distortion can be detected by, for example, a strain gauge, and the pressure can be converted into an electric signal.
  • the relationship between the oil amount and the pressure of the lubricating oil is stored in, for example, a table to be described later, and the calculation means 41 (FIG. 3) calculates the oil amount by comparing the detected pressure with the table (the same applies hereinafter). ).
  • the bellows includes a thin cylindrical portion provided with a bellows-like pleat around the cylindrical portion, and the cylindrical portion expands and contracts in the axial direction according to a pressure difference between the inside and the outside of the cylindrical portion.
  • the end surface of the cylindrical portion is displaced by the expansion and contraction of the cylindrical portion.
  • the amount of displacement of this end face is proportional to the pressure difference.
  • the displacement amount can be converted into an electric signal by a displacement sensor or the like.
  • the capacitive pressure sensor utilizes the fact that the diaphragm or the bellows is elastically deformed by pressure. That is, the movable plate is displaced with respect to the fixed plate, and the pressure is electrically detected by utilizing the change in capacitance between the plates.
  • the semiconductor pressure sensor is an integrated diaphragm and strain gauge, and a pressure receiving diaphragm is formed of a silicon single crystal, and a strain gauge is formed by diffusing impurities in a part of the pressure receiving diaphragm.
  • a part of the pressure receiving diaphragm is deformed to change the resistance of the strain gauge, and an electric signal proportional to the pressure is obtained by the bridge circuit.
  • the piezoelectric pressure sensor can convert a pressure change into an electric signal by applying pressure to the piezoelectric element and amplifying a voltage generated by the piezoelectric effect.
  • the weight sensor for example, a load cell that measures the weight proportional to the amount of lubricating oil in the lubricating oil reservoir 29 by the strain of the elastic body, or a magnetostrictive force sensor that magnetically detects the weight can be applied.
  • the relationship between the amount and weight of lubricating oil is stored in, for example, a table 41a (FIG. 3), and the calculation means 41 (FIG. 3) illuminates the detected weight against the table. Calculate the oil amount.
  • FIG. 3 is a block diagram of a control system of the in-wheel motor drive device.
  • the control device includes a VCU 42 that is an electric control unit that controls the entire automobile, and an inverter device 43 that controls the drive motor 1 in accordance with a command from the VCU 42.
  • the VCU 42 and the inverter device 43 are mounted on the vehicle body.
  • the VCU 42 includes a computer, a program executed on the computer, various electronic circuits, and the like.
  • the inverter device 43 includes a power circuit unit 44 provided for each electric motor 1 and a motor control unit 45 (motor control device) that controls the power circuit unit 44.
  • the motor control unit 45 may be provided in common for each power circuit unit 44 or may be provided separately.
  • the motor control unit 45 has a function of outputting information such as detection values and control values relating to the in-wheel motor drive device of the motor control unit 45 to the VCU 42.
  • the power circuit unit 44 includes an inverter 47 that converts the DC power of the battery 46 into three-phase AC power that is used to drive the electric motor 1, and a PWM driver 48 that controls the inverter 47.
  • the inverter 47 is composed of a plurality of semiconductor switching elements (not shown), and the PWM driver 48 performs pulse width modulation on the input current command and gives an on / off command to each of the semiconductor switching elements.
  • the motor control unit 45 includes a computer, a program executed on the computer, and an electronic circuit, and has a motor drive control unit 49 as a basic control unit.
  • the motor drive control unit 49 is a unit that converts the current command into a current command in accordance with an acceleration / deceleration command by a torque command or the like given from the VCU 42 that is a host control unit, and gives a current command to the PWM driver 48 of the power circuit unit 44.
  • the motor drive control unit 49 obtains a motor current value to be passed from the inverter 47 to the electric motor 1 from the current detection unit 35 and performs current feedback control.
  • the motor drive control unit 49 obtains the rotation angle of the motor rotor 10 (FIG. 1) of the electric motor 1 from the angle sensor 50 and performs control according to the rotation angle such as vector control.
  • the motor control unit 45 configured as described above is provided with the calculation means 41, the determination unit 51, the abnormality control means 52, and the abnormality report means 53, and the VCU 42 is provided with the abnormality display means 54.
  • the in-wheel motor drive device includes these calculation means 41, determination unit 51, abnormality control means 52, abnormality report means 53, and abnormality display means 54.
  • the oil amount detection sensor 40 is connected to the calculation means 41 via a signal line L1.
  • the signal line L1 is disposed coaxially with the connection cable L2 of the angle sensor 50.
  • a connecting portion Cn such as a connector or a terminal block is provided in the middle in the longitudinal direction of the signal line L1 connecting the oil amount detection sensor 40 and the calculating means 41.
  • the computing means 41 computes the amount of lubricating oil when the vehicle is powered on, while the detected value is illuminated against the table 41a for a certain period of time after the vehicle is stopped.
  • the above-mentioned “when the vehicle is turned on when the vehicle is turned on” refers to a state where the VCU 42 of the electric vehicle is turned on and the vehicle is completely stopped. For example, (1) a driver or the like When the VCU 42 is turned on by operating the starting means such as the key and the start button from the “OFF” position to the “accessory power supply” position before supplying power to the electric motor 1, or (2) the VCU 42 is powered on. Is turned on to turn on the starting means, but the VCU 42 does not generate an acceleration command to the electric motor 1.
  • the lubricating oil is circulated and the sensor output of the oil amount detection sensor 40 is not stable. Therefore, the measurement by the oil amount detection sensor 40 is performed after the vehicle stops.
  • the determination unit 51 determines whether or not the oil amount calculated by the calculation means 41 is out of the set range.
  • the setting range in this case is appropriately determined by experiment, simulation, or the like. For example, from an experimental result or the like, an oil amount of a minimum level or more that does not cause excessive wear in each part of the speed reducer 2 can be determined as the “set range”.
  • the abnormality control unit 52 outputs a signal indicating that the oil amount is out of the set range (abnormal). Control in response to.
  • the setting range can be arbitrarily rewritten.
  • a signal indicating that the oil amount is normal is input to the motor drive control unit 49 from the normal time control means 55. In this case, the motor drive control unit 49 performs the above-described control.
  • the abnormal time control means 52 In response to the output of the signal indicating that the oil amount is out of the set range, the abnormal time control means 52 outputs, for example, information indicating that the lubricating oil supply means Jk (FIG. 1) is abnormal.
  • a command for limiting the output of the electric motor 1 is input to the motor drive control unit 49.
  • the motor drive control unit 49 limits the motor torque and the number of rotations of the electric motor 1 based on a command from the abnormality control unit 52 as an output limiting unit.
  • the motor drive control unit 49 gradually decreases the motor torque of the electric motor 1 to stop driving the electric motor 1, for example. Further, in a state where a command for limiting the output of the electric motor 1 is input to the motor drive control unit 49, the rotation start of the electric motor 1 is not permitted.
  • the abnormality reporting unit 53 receives the information from the abnormality control unit 52 and outputs the abnormality occurrence information to the VCU 42.
  • the abnormality display means 54 of the VCU 42 alerts the driver by causing the display device to display information indicating that the lubricating oil supply means Jk (FIG. 1) is abnormal.
  • Lubricating oil is temporarily stored in the lubricating oil storage unit 29.
  • the pump 28 sucks up the lubricating oil stored in the lubricating oil reservoir 29 and forcibly circulates it through the lubricating oil passage 30 to the motor rotation shaft oil passage 32 and the reduction gear oil passage 31.
  • a part of the lubricating oil is sequentially led from the motor rotation shaft oil passage 32 to the through hole 6b and the annular gap ⁇ 1 to be used for cooling the electric motor 1.
  • the lubricating oil supplied for cooling is stored in the lubricating oil reservoir 29 through the lower part of the motor housing 8.
  • the lubricating oil introduced from the motor rotation shaft oil passage 32 to the oil supply port 37 moves radially outward in the speed reducer housing 8 while lubricating each part in the speed reducer 2 by the action of centrifugal force. Thereafter, the lubricating oil moves downward due to gravity and is stored in the lubricating oil reservoir 29 from the oil discharge port 38.
  • the abnormal time control means 52 (FIG. 3) generates a signal indicating abnormality.
  • information indicating that the lubricating oil supply means Jk is abnormal is output, and a command for limiting the output of the electric motor 1 is input to the motor drive control unit 49 (FIG. 3).
  • the oil amount detection sensor 40 is provided at the lowermost part of the lubricating oil reservoir 29, the oil amount can be detected accurately and easily even if the oil amount is excessively reduced. In this way, when the oil amount is excessively reduced, the driver recognizes the fact from the abnormality information output from the abnormality reporting means 53 and, for example, pulls the vehicle by a tow truck or the like and moves it to a repair shop or the like. The necessary measures can be taken. Thereby, abnormalities, such as excessive wear of the reduction gear 2, can be prevented beforehand. Further, the oil amount detection sensor 40 is fitted into the tip end portion of the drain plug 39 at the lowermost portion of the lubricating oil reservoir 29. As described above, the oil amount detection sensor 40 can be easily provided at the lowermost portion of the lubricating oil reservoir 29, so that the in-wheel motor drive device can be made compact and the unsprung weight can be reduced while improving versatility. .
  • the calculation means 41 displays the detection value detected by the pressure sensor or the weight sensor in the table 41a. Calculate the oil quantity in light of Accordingly, it is not necessary to store a relatively large mechanism such as a float type oil amount detection mechanism in the lubricating oil reservoir, and the apparatus can be prevented from being enlarged. In addition, the amount of lubricating oil in the lubricating oil reservoir 29 can be easily detected.
  • a shaft center oil supply mechanism (lubricant supply means Jk) is provided, and the lubricant is forcibly circulated to the motor rotation shaft oil passage 32 and the speed reducer oil passage 31 via the lubricant oil passage 30 by the pump 28.
  • the lubricating oil reservoir 29 has a mortar-shaped bottom 29a, and the oil amount detection sensor 40 is provided at the bottom of the mortar-shaped bottom 29a. Therefore, the lubricating oil stored in the lubricating oil reservoir 29 is The oil flows into the bottom of the mortar-shaped bottom 29a due to the weight of the oil. For this reason, the amount of lubricating oil can be detected stably.
  • the motor drive control unit 49 shown in FIG. 3 limits the motor torque and the rotational speed of the electric motor 1 based on the command from the abnormal time control means 52, thereby preventing the lubricating oil from being insufficiently supplied. In addition, it is possible to prevent abnormalities such as excessive wear from occurring in the speed reducer 2 and the like. In this case, the motor drive control unit 49 gradually decreases the motor torque of the electric motor 1 and stops driving the electric motor 1. By forcibly limiting the output of the electric motor 1 in this manner, excessive wear and abnormal heat generation of the speed reducer 2 can be reliably prevented. Therefore, the abnormality of the in-wheel motor drive device due to excessive reduction of the lubricating oil can be prevented in advance, and the sudden stop while the vehicle is running can be prevented.
  • a calculation means 41A having the table may be provided in the VCU 42, and the calculation means 41A and the oil amount detection sensor 40 may be connected by a signal line L3 indicated by a two-dot chain line.
  • the output of the calculation means 41 ⁇ / b> A is input to the determination unit 51 of the motor control unit 45.
  • the calculating means 41 or 41A may measure the oil amount of the lubricating oil in the lubricating oil reservoir 29 a plurality of times by the oil amount detecting sensor 40 after the vehicle stops, and calculate an average value thereof. good. In this case, the amount of lubricating oil can be determined stably.
  • You may provide the oil amount detection sensor 40 in all the in-wheel motor drive devices mounted in a vehicle, respectively.
  • An audio output unit that receives the abnormality information output from the abnormality report unit 53 and outputs a sound may be provided.
  • FIG. 5 is a diagram schematically showing an electric vehicle equipped with an in-wheel motor drive device.
  • This electric vehicle is a four-wheeled vehicle in which the wheels 56 that are the left and right rear wheels of the vehicle body are drive wheels, and the wheels 57 that are the left and right front wheels are driven wheels.
  • the front wheel 57 is a steering wheel.
  • the electric vehicle of this example includes drive units that drive the left and right wheels 56 and 56 serving as drive wheels by independent electric motors 1 and 1, respectively.
  • the rotation of the electric motor 1 is transmitted to the wheel 56 via the speed reducer 2 and the wheel bearing 5.
  • the drive unit constitutes an in-wheel motor drive device including the electric motor 1, the speed reducer 2, and the wheel bearing 5, in which part or the whole of the electric motor 1 is disposed in the wheel 56.
  • the in-wheel motor drive device Since the in-wheel motor drive device according to any one of the above-described embodiments is mounted on this electric vehicle, it is possible to prevent an abnormality of the in-wheel motor drive device due to excessive reduction of lubricating oil, and to stop suddenly while the vehicle is running Can be prevented from triggering.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • General Details Of Gearings (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

La présente invention concerne un dispositif d'entraînement de moteur-roue pourvu d'un moteur électrique (1) permettant d'entraîner une roue, un roulement de roue (5) permettant de supporter la roue, et un réducteur (2) permettant de réduire la rotation du moteur électrique (1) et de transmettre la rotation réduite au roulement de roue (5). La présente invention concerne également un réservoir de lubrifiant (29) permettant de stocker un lubrifiant, un moyen d'alimentation en lubrifiant (JK) permettant de réapprovisionner le lubrifiant stocké dans le réservoir de lubrifiant (29) au réducteur (2), et un capteur de détection de quantité d'huile (40) permettant de détecter la quantité de lubrifiant, le capteur étant prévu dans la partie la plus basse de la partie de stockage de lubrifiant (29). La présente configuration permet au dispositif d'entraînement de moteur-roue d'être plus compact et à la quantité de lubrifiant d'être détectée facilement.
PCT/JP2014/059988 2013-04-12 2014-04-04 Dispositif d'entraînement de moteur-roue WO2014168092A1 (fr)

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JP2013-083484 2013-04-12
JP2013083484A JP2014206207A (ja) 2013-04-12 2013-04-12 インホイールモータ駆動装置

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106492933A (zh) * 2016-03-07 2017-03-15 徐工集团工程机械有限公司 破碎机主轴系统、破碎机及其润滑方法
CN108953578A (zh) * 2018-10-23 2018-12-07 辽宁调兵山煤矸石发电有限责任公司 一种轴承润滑油的指示装置
CN109552025A (zh) * 2017-09-27 2019-04-02 Ntn株式会社 轮内电动机驱动装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6529899B2 (ja) * 2015-12-14 2019-06-12 住友重機械工業株式会社 減速装置のための反負荷側ケーシング、縦置き減速装置、横置き減速装置
US11932105B2 (en) 2019-09-26 2024-03-19 Volvo Truck Corporation Vehicle wheel end arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61178014U (fr) * 1985-04-26 1986-11-06
JPH03112423U (fr) * 1990-03-02 1991-11-18
JPH04249718A (ja) * 1990-12-28 1992-09-04 Nippon Gear Co Ltd 歯車変速機における隔測油面計測装置
JP2007192823A (ja) * 2006-01-17 2007-08-02 Wacker Corp 流体レベルセンサ
JP2012189095A (ja) * 2011-03-09 2012-10-04 Ntn Corp モータの診断方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61178014U (fr) * 1985-04-26 1986-11-06
JPH03112423U (fr) * 1990-03-02 1991-11-18
JPH04249718A (ja) * 1990-12-28 1992-09-04 Nippon Gear Co Ltd 歯車変速機における隔測油面計測装置
JP2007192823A (ja) * 2006-01-17 2007-08-02 Wacker Corp 流体レベルセンサ
JP2012189095A (ja) * 2011-03-09 2012-10-04 Ntn Corp モータの診断方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106492933A (zh) * 2016-03-07 2017-03-15 徐工集团工程机械有限公司 破碎机主轴系统、破碎机及其润滑方法
CN109552025A (zh) * 2017-09-27 2019-04-02 Ntn株式会社 轮内电动机驱动装置
CN108953578A (zh) * 2018-10-23 2018-12-07 辽宁调兵山煤矸石发电有限责任公司 一种轴承润滑油的指示装置

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