WO2018225696A1 - Dispositif et système de roulement de roue équipé d'un générateur pour véhicules - Google Patents

Dispositif et système de roulement de roue équipé d'un générateur pour véhicules Download PDF

Info

Publication number
WO2018225696A1
WO2018225696A1 PCT/JP2018/021415 JP2018021415W WO2018225696A1 WO 2018225696 A1 WO2018225696 A1 WO 2018225696A1 JP 2018021415 W JP2018021415 W JP 2018021415W WO 2018225696 A1 WO2018225696 A1 WO 2018225696A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
generator
wheel bearing
sealing
bearing device
Prior art date
Application number
PCT/JP2018/021415
Other languages
English (en)
Japanese (ja)
Inventor
佑介 大畑
健太郎 西川
Original Assignee
Ntn株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2018225696A1 publication Critical patent/WO2018225696A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/02—Dead axles, i.e. not transmitting torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/18—Arrangement of bearings
    • 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
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings

Definitions

  • the present invention relates to a wheel bearing device with a generator and a vehicle system, and relates to a technique capable of simplifying the structure and reducing the cost and reducing the rotational torque of the wheel bearing.
  • the conventional in-wheel motor system is considered to be designed to use an in-wheel motor as a main driving source for traveling.
  • an in-wheel motor it has been proposed to use a motor as an auxiliary drive source for traveling in an engine vehicle.
  • the motor generator mounted on the vehicle can transmit power only to the rear wheel, which is not driven by the main power system, and the power supply supplies driving power only to the motor generator.
  • a proposal configured to store only regenerative power from a motor generator for example, Patent Document 1.
  • Patent Document 1 a battery and a motor generator are connected, and the motor generator is a mechanism for transmitting power to a driven wheel (tire) via a clutch, a power distribution mechanism, and a drive shaft.
  • the motor generator is a mechanism for transmitting power to a driven wheel (tire) via a clutch, a power distribution mechanism, and a drive shaft.
  • FIG. 9 is a cross-sectional view of a conventional wheel bearing and its surrounding suspension structure.
  • the wheel bearing includes an outer ring 60 that is a fixed ring, and a hub ring 62 that is rotatably supported by the outer ring 60 via double-row rolling elements 61.
  • the outer ring 60 is attached to a knuckle or the like on a vehicle body attachment surface that is an end portion on the inboard side.
  • a hub rim 64 and a brake rotor 65 are attached to a hub flange 63 of the hub wheel 62 by a hub bolt 66 in a state where the wheel rim 64 and the brake rotor 65 overlap each other.
  • FIG. 10 is an enlarged sectional view of the wheel bearing.
  • the wheel bearing shown in the figure in order to prevent the lubricant inside the bearing from flowing out and to prevent water from entering the bearing from the outside, not only the inboard side end of the bearing space but also the outboard side A contact-type seal 67 is provided at the end.
  • the contact-type seal 67 at the outboard side end includes, for example, three seal lip portions. The contact area of these seal lip portions is large, and the rotational torque of the hub wheel 62 is high.
  • the object of the present invention is to simplify the structure and reduce the cost, prevent the grease in the bearing from flowing out, prevent water and the like from entering the bearing, and further reduce the rotational torque of the wheel bearing. It is an object of the present invention to provide a wheel bearing device with a generator and a vehicle system that can be used.
  • the wheel bearing device with a generator has a fixed wheel and a hub flange, and is rotatably supported by the fixed wheel via a rolling element so that a wheel and a brake rotor of a vehicle are attached to the hub flange.
  • a wheel bearing having a ring;
  • a generator having a stator attached to the fixed wheel and a motor rotor (a rotor of a generator) attached to the rotating wheel, the stator being located on an outer periphery of the wheel bearing, and the motor rotor (the power generator
  • the generator is an outer rotor type in which the rotor of the machine is located radially outward of the stator; Sealing means for sealing the inside of the wheel bearing, A generator sealing member for sealing an inboard side end between an inner periphery of a motor case (the generator case) covering the motor rotor (the rotor of the generator) and an outer periphery of the wheel bearing; and Sealing means having an inner side sealing member for sealing an inboard side end between the fixed wheel and the rotating wheel.
  • the generator rotor is a direct drive type attached to the rotating wheel of the wheel bearing, the configuration of the generator is simple and space-saving, and an increase in vehicle weight is also suppressed. Cost can be reduced by the simple structure of the generator. Since an increase in vehicle weight is suppressed, fuel consumption can be reduced. Since the generator is an outer rotor type in which the rotor is positioned outward in the radial direction of the stator, the moment generation position is on the outer diameter side, which is more efficient than the inner rotor type.
  • the inner seal member in the sealing means seals the inboard side end of the bearing space from the side of the frame part such as a knuckle.
  • the sealing member for the generator in the sealing means seals the inboard side end of the inner periphery of the motor case covering the motor rotor and the outer periphery of the wheel bearing so that the foreign matter from the undercarriage frame component side to the inside of the generator Prevent water and water from entering.
  • the generator sealing member that seals the inboard side end of the inner periphery of the motor case covering the motor rotor and the outer periphery of the wheel bearing is provided, water or the like is outboarded in the bearing space via the generator. It becomes possible to prevent intrusion into the side end.
  • the outer side seal member that seals the outboard side end of the bearing space only needs to prevent the grease inside the bearing from flowing out. Therefore, the torque of the wheel bearing can be reduced by making the outer seal member a simpler structure than the conventional example. As a result, the fuel consumption of the vehicle can be further reduced.
  • the wheel bearing device with a motor generator has a fixed wheel and a hub flange, and is rotatably supported by the fixed wheel via a rolling element, and a vehicle wheel and a brake rotor are attached to the hub flange.
  • a wheel bearing having a rotating wheel;
  • a motor generator having a stator attached to the fixed wheel and a motor rotor attached to the rotating wheel, wherein the stator is located on an outer periphery of the wheel bearing, and the motor rotor is radially outward of the stator.
  • a motor generator that is an outer rotor type located in Sealing means for sealing the inside of the wheel bearing, A motor generator seal member that seals an inboard side end between an inner periphery of a motor case that covers the motor rotor and an outer periphery of the wheel bearing; and an inboard side between the fixed wheel and the rotating wheel Sealing means having an inner side sealing member for sealing the end.
  • the sealing means is an outer side seal member that seals an outboard side end between the fixed wheel and the rotating wheel, and is press-fitted to the fixed wheel and is not in contact with the rotating wheel.
  • the sealing means is further an outboard side end sealing portion that seals an outboard side end between the fixed wheel and the rotating wheel, on the outboard side of the fixed wheel and the rotating wheel.
  • You may have the outboard side end sealing part which is a labyrinth structure where the surrounding surfaces which mutually oppose via a labyrinth clearance gap.
  • the labyrinth structure can be realized using the circumferential surfaces of the fixed wheel and the rotating wheel facing each other. Therefore, the number of parts can be reduced, and the overall structure of the wheel bearing device can be simplified.
  • the sealing means may further include an oil seal consisting only of a radial lip that seals an outboard side end between the fixed wheel and the rotating wheel.
  • an oil seal consisting only of a radial lip that seals an outboard side end between the fixed wheel and the rotating wheel.
  • the vehicle system according to the present invention includes any one of the wheel bearing devices with a generator or the wheel bearing device with a motor generator, and a control unit that controls the generator or the wheel bearing device with a motor generator. Is provided.
  • the control means controls the generator or the motor generator, so that the vehicle performance such as the vehicle traveling performance, the braking performance, the fuel consumption, and the like can be improved.
  • Diagram (A) is a cross-sectional view of a generator-equipped wheel bearing device according to the second embodiment of the present invention, and diagram (B) is an enlarged view of IV (B) portion of diagram (A).
  • the diagram (A) is a cross-sectional view of a generator-equipped wheel bearing device according to a third embodiment of the present invention, and the diagram (B) is an enlarged view of a V (B) portion of the diagram (A).
  • It is a block diagram which shows the conceptual structure of the system for vehicles using the wheel bearing apparatus with a generator in any one of 1st-3rd embodiment.
  • FIG. 7 is a power supply system diagram as an example of a vehicle equipped with the vehicle system of FIG. 6. It is explanatory drawing of the concept of the system for vehicles different from the system for vehicles of FIG. It is sectional drawing of the conventional wheel bearing and its periphery suspension structure. It is an expanded sectional view of the wheel bearing of FIG.
  • the wheel bearing device 1 with a generator includes a wheel bearing 2 and a generator 3.
  • the wheel bearing 2 includes an outer ring 4 that is a fixed ring, a double row rolling element 6, and an inner ring 5 that is a rotating wheel.
  • An inner ring 5 is rotatably supported on the outer ring 4 via double row rolling elements 6.
  • Grease is sealed in the bearing space between the inner and outer rings 5 and 4.
  • the inner ring 5 has a hub flange 7 at a location protruding from the outer ring 4 toward the outboard side in the axial direction.
  • the outer ring 4 is attached to an underbody frame part (not shown) such as a knuckle with a bolt not shown on the vehicle body attachment surface 4a, which is the end (inboard side) opposite to the hub flange 7, Support weight.
  • the side closer to the outer side in the vehicle width direction of the vehicle when the wheel bearing device 1 with the generator is mounted on the vehicle is referred to as the outboard side, and closer to the center in the vehicle width direction of the vehicle.
  • the side is called the inboard side.
  • a wheel rim (not shown), a brake rotor 12 and a case bottom 11 (described later) are attached to a side surface of the hub flange 7 on the outboard side by a hub bolt 13 in a state where they overlap in the axial direction.
  • a tire is attached to the outer periphery of the rim.
  • the outer ring 4 in this example has an outer ring main body 4b in which each raceway surface is formed, and an annular outer ring outer peripheral body 4c fixed to the outer peripheral surface of the outer ring main body 4b.
  • the outer ring main body 4b is formed, for example, by processing an existing hub outer ring.
  • the outer ring outer peripheral body 4c is fixed to the outer peripheral surface of the outer ring main body 4b via a key or the like (not shown).
  • a shoulder portion 14 projecting radially inward is provided on the inner peripheral surface of the outer ring outer peripheral body 4c on the outboard side, and the outer side end of the outer ring main body 4b is in contact with the inner side surface of the shoulder portion 14.
  • outer ring outer peripheral body 4c is positioned in the axial direction with respect to the outer ring main body 4b.
  • the outer ring 4 may be a single part in which the outer ring main body 4b and the outer ring outer peripheral body 4c are integrally formed.
  • the brake 17 is a friction brake including a disc-type brake rotor 12 and a brake caliper (not shown).
  • the brake rotor 12 has a flat plate-like portion 12a and an outer peripheral portion 12b.
  • the flat plate portion 12a is an annular flat plate member that overlaps the hub flange 7 with the case bottom portion 11 interposed therebetween.
  • the outer peripheral portion 12 b extends from the flat plate-like portion 12 a to the outer peripheral side of the outer ring 4.
  • the outer peripheral portion 12b includes a cylindrical portion 12ba extending in a cylindrical shape from the outer peripheral edge portion of the flat plate portion 12a toward the inboard side, and a flat plate portion 12bb extending in a flat plate shape from the inboard side end of the cylindrical portion 12ba toward the outer diameter side. And have.
  • the brake caliper has a friction pad (not shown) for sandwiching the flat plate portion 12bb of the brake rotor 12.
  • the brake caliper is attached to the underbody frame component.
  • the brake caliper may be either hydraulic or mechanical. Instead, an electric motor type may be used.
  • the generator 3 in this example is a motor generator for driving assistance that can generate electric power by rotation of a wheel and can rotate the wheel by being fed.
  • the generator 3 includes a motor case 15 attached to the hub flange 7 of the inner ring 5, a stator 18 attached to the outer peripheral surface of the outer ring 4, and a motor rotor 19 covered with the motor case 15.
  • the generator 3 is an outer rotor motor in which the motor rotor 19 is located radially outward of the stator 18.
  • the generator 3 in the illustrated example is an outer rotor type IPM (Interior Permanent Magnet) synchronous motor, but may be an outer rotor type SPM (Surface Permanent Magnet) synchronous motor. In the synchronous motor, distributed winding or concentrated winding can be adopted as the winding form of the stator 18.
  • the motor case 15 has a bottomed cylindrical case body 16 and an annular lid 20 that closes the opening end of the case body 16 on the inboard side.
  • the case main body 16 includes a case bottom portion 11 and a case cylindrical portion 25.
  • the case bottom 11 and the case cylindrical portion 25 are integrally formed.
  • the case bottom 11 is a flat plate-like and annular member sandwiched between the flat plate-like portion 12 a of the brake rotor 12 and the hub flange 7.
  • a case cylindrical portion 25 extends in a cylindrical shape from the outer peripheral edge portion of the case bottom portion 11 to the inboard side.
  • a flange portion extending outward in the radial direction is provided on the outer peripheral surface on the inboard side of the case cylindrical portion 25.
  • a flange portion extending radially outward is provided on the outer peripheral surface of the lid 20, and the flange portion of the lid 20 and the flange portion of the case cylindrical portion 25 overlap in the axial direction and are joined by a bolt or the like not shown. Yes.
  • the stator 18 has a core 18a and a coil (not shown) wound around each tooth of the core 18a.
  • a flange portion extending outward in the radial direction is provided on the outer peripheral surface of the outer ring outer peripheral body 4c on the outboard side.
  • the stator 18 is positioned in the axial direction with respect to the outer ring 4 when the end of the core 18a on the outboard side abuts against the flange portion.
  • the motor rotor 19 includes a magnetic body (not shown) and a permanent magnet (not shown) built in the magnetic body.
  • the motor rotor 19 is provided on the large diameter portion 25c of the inner peripheral surface of the case cylindrical portion 25 by bonding or the like.
  • the generator-equipped wheel bearing device 1 seals the inside of the wheel bearing 2, that is, the bearing space of the wheel bearing 2, thereby preventing the grease sealed in the wheel bearing 2 from flowing out. It has.
  • the sealing means 26 includes a generator sealing member 27, an inner side sealing member 28, and an outer side sealing member 29.
  • the generator seal member 27 seals the inboard side end between the inner periphery of the motor case 15 and the outer periphery of the wheel bearing 2. That is, the generator seal member 27 includes a seal plate 27a fitted to the inner peripheral surface of the lid 20 of the motor case 15, a seal body 27b that mainly covers the side surface of the seal plate 27a, and the seal body. And a lip 27c extending from the inner diameter side to the inner diameter side. The lip 27c is a radial lip that is in sliding contact with the outer peripheral surface of the outer ring outer peripheral body 4c in the radial direction.
  • the seal plate 27a is made of a steel plate and is attached by being fitted to the inner peripheral surface of the lid 20 in a press-fitted state.
  • the seal body 27b and the lip 27c are made of, for example, an elastic material such as natural rubber, butadiene rubber, nitrile rubber, and the like, and are integrally provided by being vulcanized and bonded to the seal plate 27a.
  • an elastic material such as natural rubber, butadiene rubber, nitrile rubber, and the like.
  • the inner side sealing member 28 seals the inboard side end between the outer ring 4 and the inner ring 5.
  • the inner side sealing member 28 prevents the grease sealed in the wheel bearing 2 from flowing out and prevents water and the like from entering from the outside.
  • the inner side seal member 28 includes an annular seal plate 31 and an annular seal member 32 that are attached to the inner ring 5 and the outer ring 4 and face each other.
  • the seal plate 31 is made of a metal having an L-shaped cross section including a cylindrical portion 31a fitted to the outer peripheral surface of the inner ring 5 and a standing plate portion 31b rising from an end portion on the inboard side of the cylindrical portion 31a.
  • the elastic seal member 32 is obtained by fixing an elastic body 34 to an annular cored bar 33.
  • the core metal 33 has a cylindrical portion that fits to the inner peripheral surface of the outer ring main body 4b and a standing plate portion that falls from an end portion on the outboard side of the cylindrical portion, and is opposed to the seal plate 31 in the axial direction.
  • the cross section has an inverted L shape.
  • the elastic body 34 is provided so as to cover the inside of the cored bar 33, and includes two side lips 34a and 34a and one radial lip 34b.
  • the two side lips 34 a and 34 a are arranged side by side inside and outside in the radial direction of the cored bar 33, extend from the standing plate part of the cored bar 33 to the oblique outer diameter side, and each has a tip at the standing plate of the seal plate 31. It contacts the part 31b.
  • These side lips 34a and 34a prevent water and the like from entering from the outside.
  • the radial lip 34 b is for preventing grease leakage, extends from the tip of the standing plate portion of the core metal 33 toward the oblique inner diameter side, and the tip contacts the cylindrical portion 31 a of the seal plate 31.
  • the outer side sealing member 29 seals the outboard side end between the outer ring 4 and the inner ring 5.
  • the outer side sealing member 29 is made of a metal annular member having an L-shaped cross section having a cylindrical portion 29a and a standing plate portion 29b.
  • the cylindrical portion 29a is press-fitted to the inner peripheral surface of the shoulder portion 14 of the outer ring outer peripheral body 4c.
  • the upright plate portion 29b extends radially inward from the end portion on the outboard side of the cylindrical portion 29a. The tip of the upright plate portion 29 b is not in contact with the outer peripheral surface of the inner ring 5.
  • the motor rotor 19 of the generator 3 is of the direct drive type that is attached to the outer ring 4 that is the rotating wheel of the wheel bearing 2. Is simple and space-saving, and the increase in vehicle weight can be suppressed. Cost reduction can be achieved by the simple configuration of the generator 3. Since an increase in vehicle weight is suppressed, fuel consumption can be reduced. Since the generator 3 is an outer rotor motor in which the motor rotor 19 is located radially outward of the stator 18, the moment generation position is on the outer diameter side and is more efficient than the inner rotor type.
  • the inner side sealing member 28 seals the inboard side end of the bearing space from the suspension frame component side.
  • the generator seal member 27 seals the inboard side end of the inner periphery of the motor case 15 covering the motor rotor 19 and the outer periphery of the wheel bearing 2, so that the undercarriage frame component side is connected to the generator 3. Prevent ingress of foreign matter and water.
  • the generator sealing member 27 for sealing the inboard side end of the inner periphery of the motor case 15 covering the motor rotor 19 and the outer periphery of the wheel bearing 2 is provided, water or the like passes through the generator 3. It becomes possible to prevent intrusion into the outboard side end of the bearing space.
  • the outer side sealing member 29 that seals the outboard side end of the bearing space only needs to prevent the grease inside the bearing from flowing out. Therefore, the torque of the wheel bearing 2 can be reduced by making the outer side seal member 29 simpler than the conventional example. Specifically, since the outer seal member 29 is not in contact with the outer peripheral surface of the inner ring 5, it is possible to reliably reduce the torque of the wheel bearing 2 as compared with the conventional contact seal. As a result, the fuel consumption of the vehicle can be further reduced. Since the outer side seal member 29 is made of a metal annular member, the seal structure can be simplified and the cost can be reduced as compared with the conventional seal made of a core metal and an elastic member.
  • the sealing means 26 ⁇ / b> A is replaced with the above-described outer-side seal member, with a labyrinth structure. It is good also as a structure provided with the outboard side end sealing part 38 which is.
  • the outboard side end sealing portion 38 has a labyrinth structure in which the inner peripheral surface of the shoulder portion 14 of the outer ring outer peripheral body 4 c faces the outer peripheral surface of the inner ring 5 via a predetermined labyrinth gap ⁇ .
  • the predetermined labyrinth gap ⁇ is a gap that is appropriately determined by design or the like, and is determined by, for example, finding an appropriate gap by a test or simulation.
  • a labyrinth structure can be realized using the circumferential surfaces of the inner and outer rings 5, 4 facing each other. Therefore, the number of parts can be reduced, and the overall structure of the wheel bearing device with a generator can be simplified.
  • the sealing means 26 ⁇ / b> B is replaced with the above-described outer side seal member, and a radial lip is used. It is good also as a structure provided with the oil seal 46 which consists only of 46a.
  • the oil seal 46 includes a seal plate 46b fitted to the inner peripheral surface of the shoulder portion 14 of the outer ring outer peripheral body 4c, a seal body 46c that mainly covers the side surface of the outboard side of the seal plate 46b, and the seal body 46c. And a radial lip 46a extending to the inner diameter side.
  • the radial lip 46a is in sliding contact with the outer peripheral surface of the inner ring in the radial direction.
  • the oil seal 46 having only the radial lip 46a as the lip improves reliability with respect to grease leakage while minimizing an increase in rotational torque.
  • FIG. 6 is a block diagram showing a conceptual configuration of a vehicle system using a plurality of generator-equipped wheel bearing devices 1 according to any of the first to third embodiments.
  • Generator equipped wheel support bearing 2 in the bearing device for a wheel 1 (FIG. 1) is a bearing supporting the corresponding driven wheel 10 B.
  • the main drive source 35 is an internal combustion engine such as a gasoline engine or a diesel engine, a motor generator (electric motor), or a hybrid drive source that combines both.
  • the “motor generator” refers to an electric motor capable of generating electricity by applying rotation.
  • the vehicle 30 is a front wheel drive vehicle in which the front wheels are drive wheels 10 A and 10 A and the rear wheels are driven wheels 10 B and 10 B, and the main drive source 35 is the internal combustion engine 35 a and the drive wheel side.
  • This is a hybrid vehicle (hereinafter sometimes referred to as “HEV”) having a motor generator 35b.
  • HEV hybrid vehicle
  • Hybrids are broadly divided into strong hybrids and mild hybrids.
  • Mild hybrids refer to the type in which the main drive source is an internal combustion engine, and the motor is mainly used to assist driving when starting or accelerating.
  • the (electric vehicle) mode is distinguished from a strong hybrid by being able to perform normal driving for a while but not for a long time.
  • Internal combustion engine 35a of the example of the figure is connected to the drive shaft of the drive wheels 10 A, 10 A via the clutch 36 and speed reducer 37, the motor generator 35b of the driving wheel is connected to the reducer 37 .
  • This vehicle system includes generators 3 and 3 that are motor generators for driving assistance that rotate the driven wheels 10 B and 10 B , and individual control means 39 and 39 that control the generators 3 and 3. And an individual motor generator command means 45 that is provided in the host ECU 40 and outputs a command for causing the individual control means 39, 39 to control driving and regeneration.
  • the generators 3 and 3 are connected to power storage means.
  • a battery storage battery
  • a capacitor a capacitor, or the like can be used.
  • the type and the mounting position on the vehicle 30 are not limited, but in this embodiment, the low voltage battery 50 mounted on the vehicle 30 and The medium voltage battery 49 is the medium voltage battery 49.
  • the generator 3 for the driven wheel is a direct drive motor that does not use a transmission.
  • the generator 3 acts as an electric motor by supplying electric power, and also acts as a generator that converts the kinetic energy of the vehicle 30 into electric power.
  • the generator 3 has a motor rotor 19 (FIG. 1) attached to the inner ring 5 (FIG. 1), which is a hub ring, when the current is applied to the generator 3, the inner ring 5 (FIG. 1) is rotationally driven.
  • regenerative power can be obtained by loading an induced voltage.
  • the host ECU 40 is a unit that performs integrated control of the vehicle 30 and includes a torque command generation unit 43.
  • the torque command generating means 43 generates a torque command in accordance with operation amount signals respectively input from an accelerator operating means 56 such as an accelerator pedal and a brake operating means 57 such as a brake pedal.
  • the vehicle 30 includes a motor generator 35b of the internal combustion engine 35a and the drive wheel as the main drive source 35, and because with the two generators 3, 3 for driving two driven wheels 10 B, 10 B, respectively, Torque command distribution means 44 that distributes the torque command to each of the drive sources 35a, 35b, 3, and 3 according to a predetermined rule is provided in the host ECU 40.
  • the torque command for the internal combustion engine 35 a is transmitted to the internal combustion engine control means 47 and used for valve opening control by the internal combustion engine control means 47.
  • the torque command for the drive wheel side generator motor 35b is transmitted to the drive wheel side motor generator control means 48 and executed.
  • Torque commands for the generators 3 and 3 on the driven wheel side are transmitted to the individual control means 39 and 39.
  • a portion of the torque command distribution means 44 that outputs to the individual control means 39, 39 is referred to as an individual motor generator command means 45.
  • This individual motor generator command means 45 has a function of giving to the individual control means 39 a torque command that serves as a braking force command for the generator 3 to perform braking by regenerative braking in response to an operation amount signal of the brake operation means 57. Also equipped.
  • the individual motor generator command means 45 and the individual control means 39, 39 constitute a control means 68 for controlling the generators 3, 3.
  • the individual control means 39 is an inverter device, an inverter 41 that converts DC power of the medium voltage battery 49 into a three-phase AC voltage, and a control unit 42 that controls the output of the inverter 41 by PWM control or the like according to the torque command or the like.
  • the inverter 41 includes a bridge circuit (not shown) using a semiconductor switching element and the like, and a charging circuit (not shown) that charges the medium voltage battery 49 with the regenerative power of the auxiliary power unit 3.
  • the individual control means 39 is individually provided for the two generators 3 and 3, but may be housed in one housing and share the control unit 42 between the two individual control means 39 and 39. Good.
  • FIG. 7 is a power system diagram as an example of a vehicle equipped with the vehicle system shown in FIG.
  • a low voltage battery 50 and a medium power battery 49 are provided as batteries, and both the batteries 49 and 50 are connected via a DC / DC converter 51.
  • the motor generator 35b (FIG. 6) on the driving wheel side in FIG. 6 is connected to the middle power system in parallel with the generator 3 on the driven wheel side, although not shown in FIG.
  • a low voltage load 52 is connected to the low voltage system, and a medium voltage load 53 is connected to the medium voltage system.
  • the low voltage battery 50 is a battery generally used for various automobiles as a power source for a control system or the like, and is, for example, 12V or 24V.
  • As the low voltage load 52 there are basic parts such as a starter motor, lights, a host ECU 40 and other ECUs (not shown) of the internal combustion engine 35a.
  • the low voltage battery 50 may be referred to as an auxiliary battery for electrical accessories, and the medium voltage battery 49 may be referred to as an auxiliary battery for an electric system.
  • the medium voltage battery 49 is higher in voltage than the low voltage battery 50 and lower than a high voltage battery (100V or more, for example, about 200 to 400V) used in a strong hybrid vehicle, etc.
  • the voltage is not a problem.
  • a 48V battery that has recently been used for mild hybrids is preferred.
  • the medium voltage battery 49 such as a 48V battery can be mounted relatively easily on a vehicle equipped with a conventional internal combustion engine, and as a mild hybrid, fuel efficiency can be reduced by power assist or regeneration using electric power.
  • the medium voltage load 53 of the 48V system is the accessory part, and includes a power assist motor, an electric pump, an electric power steering, a supercharger, an air compressor, and the like, which are the generator 3 on the driving wheel side.
  • the output of power assist is lower than that of high voltage (such as a strong hybrid vehicle of 100V or more), but the risk of electric shock to passengers and maintenance workers can be reduced. it can.
  • the insulating coating of the electric wire can be thinned, the weight and volume of the electric wire can be reduced.
  • the volume of the motor or generator can be reduced. From these things, it contributes to the fuel consumption reduction effect of a vehicle.
  • This vehicle system is suitable for accessory parts of such mild hybrid vehicles, and is applied as power assist and power regeneration parts.
  • CMG, GMG, belt-driven starter motors (none of which are shown) may be employed, and these are all power assists for the internal combustion engine or the power unit. Or, since it is regenerated, it is affected by the efficiency of the transmission device and the speed reducer.
  • the power regeneration In some cases, the kinetic energy of the vehicle body 1 can be used directly.
  • the generator 3 of the system can be installed with the same man-hours as parts replacement even for a complete vehicle, and a 48V system can be configured even for a complete vehicle having only the internal combustion engine 35a.
  • Another auxiliary drive motor generator 35b may be mounted on the vehicle on which the vehicle system of this embodiment is mounted, as in the example of FIG. In this case, the power assist amount and the regenerative power amount for the vehicle 30 can be increased, which further contributes to fuel efficiency reduction.
  • FIG. 8 shows that the generator-equipped wheel bearing device 1 according to any one of the first to third embodiments is applied to driving wheels 10 A and 10 A as front wheels and driven wheels 10 B and 10 B as rear wheels.
  • the example which applied each is shown.
  • the drive wheels 10 A and 10 A are driven via a clutch 36 and a speed reducer 7 by a main drive source 35 including an internal combustion engine.
  • the generator equipped wheel support bearing assembly 1 is installed in this front-wheel drive vehicle.
  • the wheel bearing device 1 with a generator can be applied not only to the driven wheels 10 B and 10 B but also to the driving wheels 10 A and 10 A.
  • the vehicle system shown in FIG. 6 has a function of generating power, but may be a system that does not rotate by power feeding.
  • a braking force can be generated by storing the regenerative power generated by the generators 3 and 3 in the medium voltage battery 49.
  • the braking performance can be improved by using together with or using the mechanical brake operating means 57.
  • each individual control means 39 can be comprised not as an inverter apparatus but as an AC / DC converter apparatus (not shown).
  • the AC / DC converter device has a function of charging the regenerative power of the generator 3 to the medium voltage battery 49 by converting a three-phase AC voltage to a DC voltage, and the control method is easier than an inverter. Miniaturization is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Rolling Contact Bearings (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

L'invention concerne un dispositif de roulement de roue équipé d'un générateur, dont le coût peut être réduit en raison d'une structure simplifiée et qui permet de prévenir à la fois la sortie de graisse des roulements et l'intrusion d'eau et analogues dans des roulements et un couple de rotation réduit dans des roulements de roue. Le dispositif de palier de roue équipé d'un générateur (1) selon l'invention est pourvu d'un roulement de roue (2) et d'un générateur (3). Le générateur (3) est un générateur (3) ayant un stator (18) fixé à un anneau de retenue (4) et un rotor de moteur (19) fixé à un anneau fendu (3) et est du type à rotor extérieur, le stator (18) étant positionné sur la périphérie extérieure du roulement de roue et le rotor de moteur (19) étant positionné radialement à l'extérieur du stator (18). Le dispositif de palier de roue équipé d'un générateur (1) selon l'invention est pourvu d'un moyen d'étanchéité (26) pour sceller l'intérieur du roulement de roue (2). Le moyen d'étanchéité (26) comprend : un élément d'étanchéité de générateur (27) pour sceller une extrémité côté embarqué entre le périmètre intérieur d'un carter de moteur (15) recouvrant le rotor de moteur (19) et la périphérie extérieure du roulement de roue (2) ; et un élément d'étanchéité côté intérieur (28) pour sceller une extrémité côté embarqué entre les anneaux interne et externe.
PCT/JP2018/021415 2017-06-09 2018-06-04 Dispositif et système de roulement de roue équipé d'un générateur pour véhicules WO2018225696A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-113970 2017-06-09
JP2017113970A JP7164937B2 (ja) 2017-06-09 2017-06-09 発電機付き車輪用軸受装置および車両用システム

Publications (1)

Publication Number Publication Date
WO2018225696A1 true WO2018225696A1 (fr) 2018-12-13

Family

ID=64565834

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/021415 WO2018225696A1 (fr) 2017-06-09 2018-06-04 Dispositif et système de roulement de roue équipé d'un générateur pour véhicules

Country Status (2)

Country Link
JP (1) JP7164937B2 (fr)
WO (1) WO2018225696A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7224198B2 (ja) * 2019-02-08 2023-02-17 Ntn株式会社 車両用動力装置および発電機付き車輪用軸受装置
JP7251440B2 (ja) * 2019-10-16 2023-04-04 日本精工株式会社 発電機付ハブユニット軸受

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357721A (ja) * 1989-07-26 1991-03-13 Tokyo R & D:Kk 電動車輌
JP2008190615A (ja) * 2007-02-05 2008-08-21 Ntn Corp 車輪軸受装置
JP2011251668A (ja) * 2010-06-04 2011-12-15 Ntn Corp インホイールモータ駆動装置
JP2013169904A (ja) * 2012-02-21 2013-09-02 Yokohama Rubber Co Ltd:The インホイールモータユニットおよび空気圧調整装置
DE102012204790A1 (de) * 2012-03-26 2013-09-26 Schaeffler Technologies AG & Co. KG Dynamische Bremsraumdichtung
JP2015020707A (ja) * 2013-07-23 2015-02-02 Ntn株式会社 インホイール型モータ内蔵車輪用軸受装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357721A (ja) * 1989-07-26 1991-03-13 Tokyo R & D:Kk 電動車輌
JP2008190615A (ja) * 2007-02-05 2008-08-21 Ntn Corp 車輪軸受装置
JP2011251668A (ja) * 2010-06-04 2011-12-15 Ntn Corp インホイールモータ駆動装置
JP2013169904A (ja) * 2012-02-21 2013-09-02 Yokohama Rubber Co Ltd:The インホイールモータユニットおよび空気圧調整装置
DE102012204790A1 (de) * 2012-03-26 2013-09-26 Schaeffler Technologies AG & Co. KG Dynamische Bremsraumdichtung
JP2015020707A (ja) * 2013-07-23 2015-02-02 Ntn株式会社 インホイール型モータ内蔵車輪用軸受装置

Also Published As

Publication number Publication date
JP7164937B2 (ja) 2022-11-02
JP2018203193A (ja) 2018-12-27

Similar Documents

Publication Publication Date Title
US10752104B2 (en) Bearing device for wheels with auxiliary power device
JP7156787B2 (ja) 車輪用軸受装置およびこの車輪用軸受装置を備えた車両
CN112154075B (zh) 车辆用动力装置和带有发电机的车轮用轴承
US11641146B2 (en) Wheel bearing system with generator
JP7089939B2 (ja) モータおよびこのモータを備えた車両用動力装置、発電機およびこの発電機を備えた発電機付車輪用軸受
WO2020162399A1 (fr) Dispositif d'alimentation de véhicule et dispositif de roulement de roue équipé d'un générateur
JP6976083B2 (ja) 車両動力補助システムおよび車両従動輪回生システム
JP2020128134A (ja) 車両用動力装置および発電機付き車輪用軸受装置
JP7025176B2 (ja) 車両用動力装置
WO2019138965A1 (fr) Appareil de roulement de roue et véhicule doté d'un appareil de roulement de roue
JP7438028B2 (ja) 車両用動力装置および発電機付車輪用軸受
WO2018225696A1 (fr) Dispositif et système de roulement de roue équipé d'un générateur pour véhicules
WO2020162400A1 (fr) Dispositif de puissance de véhicule pourvu d'un moteur électrique et roulement de roue fixé sur un générateur, pourvu d'un générateur
JP7140608B2 (ja) 車両用動力装置および発電機付き車輪用軸受装置
JP6997571B2 (ja) 発電機付き車輪用軸受装置
WO2019078216A1 (fr) Dispositif de puissance de véhicule et dispositif de palier de roue avec générateur
JP2019018707A (ja) 動力装置付き車輪用軸受装置
WO2020179639A1 (fr) Moteur électrique, générateur d'énergie, et dispositif de véhicule équipé de celui-ci
WO2018056270A1 (fr) Système d'assistance pour véhicule
JP2020142691A (ja) 車両用動力装置およびこれを備えた車両、発電機付き車輪用軸受装置
JP2019048555A (ja) 発電機付き車輪用軸受装置およびこの発電機付き車輪用軸受装置を備えた車両

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18813544

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18813544

Country of ref document: EP

Kind code of ref document: A1