WO2022224507A1 - 駆動輪及び台車 - Google Patents
駆動輪及び台車 Download PDFInfo
- Publication number
- WO2022224507A1 WO2022224507A1 PCT/JP2022/001303 JP2022001303W WO2022224507A1 WO 2022224507 A1 WO2022224507 A1 WO 2022224507A1 JP 2022001303 W JP2022001303 W JP 2022001303W WO 2022224507 A1 WO2022224507 A1 WO 2022224507A1
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- WIPO (PCT)
- Prior art keywords
- wheel
- axle
- output shaft
- power conversion
- drive
- Prior art date
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- 230000007246 mechanism Effects 0.000 claims description 307
- 238000006243 chemical reaction Methods 0.000 claims description 76
- 230000005540 biological transmission Effects 0.000 claims description 38
- 230000009467 reduction Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0026—Propulsion aids
- B62B5/0066—Transmission of movement
-
- 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
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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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
- B60K17/30—Arrangement or mounting of transmissions in vehicles the ultimate propulsive elements, e.g. ground wheels, being steerable
- B60K17/303—Arrangement or mounting of transmissions in vehicles the ultimate propulsive elements, e.g. ground wheels, being steerable with a gearwheel on the steering knuckle or kingpin axis
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/001—Steering devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0026—Propulsion aids
- B62B5/0033—Electric motors
- B62B5/0036—Arrangements of motors
- B62B5/0043—One motor drives one 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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/06—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes
-
- 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
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/14—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising conical gears only
-
- 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
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
- F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H1/222—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with non-parallel axes
-
- 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
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/24—Toothed gearings for conveying rotary motion without gears having orbital motion involving gears essentially having intermeshing elements other than involute or cycloidal teeth
-
- 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
- F16H1/2854—Toothed gearings for conveying rotary motion with gears having orbital motion involving conical gears
-
- 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
- B60K2007/0046—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the vehicle body, i.e. moving independently from the wheel axle
-
- 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
- B60K2007/0069—Disposition of motor in, or adjacent to, traction wheel the motor axle being perpendicular to the wheel axle
- B60K2007/0084—Disposition of motor in, or adjacent to, traction wheel the motor axle being perpendicular to the wheel axle the motor axle being vertical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
- B62B2301/04—Wheel arrangements; Steering; Stability; Wheel suspension comprising a wheel pivotable about a substantially vertical axis, e.g. swivelling castors
- B62B2301/044—Wheel arrangements; Steering; Stability; Wheel suspension comprising a wheel pivotable about a substantially vertical axis, e.g. swivelling castors arranged remote from the longitudinal centreline of the hand propelled vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0418—Electric motor acting on road wheel carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/02—Steering linkage; Stub axles or their mountings for pivoted bogies
- B62D7/023—Steering turntables
Definitions
- the present invention relates to drive wheels and trucks.
- Patent Document 1 discloses driving wheels and trucks using driving wheels.
- This drive wheel has a first input shaft and a second input shaft arranged coaxially, a first output shaft and a second output shaft arranged on separate shafts, and a rotational force of the first input shaft.
- a first spur gear mechanism that transmits to the output shaft, a second spur gear mechanism that transmits the rotational force of the second input shaft to the second output shaft, a wheel connected to the axle, and the wheel can be turned via the axle a first power conversion mechanism that transmits the rotational force of the first output shaft to one end of the axle, and a second power conversion mechanism that transmits the rotational force of the second output shaft to the other end of the axle and
- the driving wheels are such that the rotation axis of the wheel along the vertical direction intersecting the axial direction of the axle is offset from the axis of the turning shaft in the horizontal direction orthogonal to the axial direction of the axle. are placed.
- Cited Document 1 The drive wheel described in Cited Document 1 enables the two mounted drive devices to operate simultaneously, regardless of whether the direction of the wheel is changed or the wheel is rotated, while simplifying the structure. It is possible to secure sufficient minimum ground clearance while planning. By offsetting the driving wheels, the wheels can passively turn by an external force acting from the horizontal direction when the wheels are not driven.
- the relationship between the turning radius based on the offset amount and the wheel radius is such that, for example, when the turning radius and the wheel radius are equal, the rotational speed of the wheels is , the turning speed is the same and the turning radius becomes large, and the area occupied by the drive wheels becomes large.
- the turning radius is equal to the wheel radius, it tends to be difficult to handle manual steering by passive turning.
- the wheel radius is made larger than the turning radius, the rotational speed of the wheels will be greater than the turning speed. This makes it difficult to control the course change by the drive wheels, so control is performed with the rotational speed of the wheels suppressed.
- the drive wheels in the offset mode cannot exhibit the maximum rotation speed, which is the output of the drive source, and the efficiency is lowered.
- the present disclosure has been made in view of the above problems, and aims to provide drive wheels and a bogie capable of improving drive efficiency in a form in which the wheels are offset with respect to the pivot axis.
- the drive wheel of one aspect of the present disclosure includes a first input shaft and a second input shaft that are coaxially arranged, and a first output shaft and a second output shaft that are arranged on separate shafts.
- a shaft a first transmission mechanism for transmitting the rotational force of the first input shaft to the first output shaft; a second transmission mechanism for transmitting the rotational force of the second input shaft to the second output shaft;
- a wheel connected to a wheel, a turning shaft that rotatably supports the wheel via the axle, a first power conversion mechanism that transmits the rotational force of the first output shaft to one end of the axle, and the second a second power conversion mechanism that transmits the rotational force of two output shafts to the other end of the axle, and the rotation axis of the wheel that extends in the vertical direction across the axis of the axle is aligned with the turning axis.
- the reduction ratio of the first power conversion mechanism and the second power conversion mechanism, or the gear ratio of the meshing gears of the first power conversion mechanism and the second power conversion mechanism is set to (R2 /R1) ⁇ 10% relationship.
- the reduction ratio of the first transmission mechanism and the second transmission mechanism, or the gear ratio of the meshing gears of the first transmission mechanism and the second transmission mechanism is set to the relationship of R2/R1. do.
- the first output shaft and the second output shaft are arranged on both sides of the wheel in the axial direction of the axle.
- the first power conversion mechanism and the second power conversion mechanism are arranged on both sides of the wheel in the axial direction of the axle.
- the first power conversion mechanism and the second power conversion mechanism are arranged above in a vertical direction crossing the axial direction of the axle.
- a first power transmission mechanism is provided between the first power conversion mechanism and one end of the axle, and a first power transmission mechanism is provided between the second power conversion mechanism and the other end of the axle.
- a second power transmission mechanism is provided.
- the first power conversion mechanism transmits the rotational force of the first output shaft to one end of the axle having a different axial direction with respect to the first output shaft.
- Any one of a gear mechanism, a helical gear mechanism, a worm gear mechanism, a crown gear mechanism, or a universal joint mechanism is applied, and the second power conversion mechanism converts the rotational force of the second output shaft to the second output It is transmitted to one end of the axle having a different axial direction with respect to the shaft, and any one of a bevel gear mechanism, a helical gear mechanism, a worm gear mechanism, a crown gear mechanism, or a universal joint mechanism is applied. .
- the turning shaft has a first supporting member and a second supporting member connected to both sides of the wheel in the axial direction of the axle, and the axle has respective ends in the axial direction.
- a portion is rotatably supported by the first support member and the second support member.
- a truck according to one aspect of the present disclosure includes the drive wheels described above and a truck body to which the drive wheels are attached.
- drive efficiency can be improved in a form in which the wheels are offset with respect to the turning axis.
- FIG. 1 is a perspective view showing a configuration example of a driving wheel.
- FIG. 2 is a front view showing drive wheels.
- FIG. 3 is a side view showing drive wheels.
- FIG. 4 is a cross-sectional view taken along line AA of FIG. 5 is a cross-sectional view taken along the line BB of FIG. 4.
- FIG. 6 is a cross-sectional view taken along line CC of FIG. 4.
- FIG. 7 is a schematic diagram showing the driving force transmission path of the drive wheels.
- FIG. 8 is a perspective view illustrating a technique for improving driving efficiency of drive wheels.
- FIG. 9 is a perspective view illustrating a technique for improving driving efficiency of drive wheels.
- FIG. 10 is a partial perspective view showing an example of the power conversion mechanism.
- FIG. 11 is a partial perspective view showing an example of the power conversion mechanism.
- FIG. 12 is a partial perspective view showing an example of the power conversion mechanism.
- FIG. 13 is a partial front view showing an example of the power conversion mechanism.
- FIG. 14 is a schematic diagram showing a configuration example of a truck.
- FIG. 15 is a main part front view showing a modification of the drive wheel.
- FIG. 16 is a side view of a main part showing a modified example of the driving wheel.
- FIG. 14 is a schematic diagram showing a configuration example of a truck.
- the truck 100 includes a truck main body 100A, a handle portion 102, four driving wheels 103, a power supply portion 104, a control device 105, and an operation portion 106.
- the carriage body 100A is, for example, a flat plate material, and has a rectangular shape in plan view.
- a handle portion 102 is fixed to one side in the longitudinal direction of the carriage body 100A.
- the carriage body 100A has four drive wheels 103 attached to its four corners on the rear side.
- the four drive wheels 103 are rotatable and steerable.
- the trolley main body 100A has a power source section 104 and a control device 105 mounted on the rear surface between the front and rear drive wheels 103, and an operation section 106 mounted on the handle section 102.
- Controller 105 includes a computer system.
- a computer system includes a processor such as a CPU and memory such as ROM or RAM.
- the control device 105 that receives the operation signal from the operation unit 106 controls the driving wheels 103. Thereby, the truck 100 can automatically run and turn.
- the operation unit 106 may be configured as a remote control device separate from the carriage 100 instead of being provided on the carriage 100 (handle portion 102). It is possible.
- the carriage body 100A has a flat surface, so that an object to be transported can be placed on the flat surface. That is, the carriage 100 can be configured as an automatic guided vehicle (AGV). Further, the trolley 100 can be configured as a device that travels by arranging equipment along the flat surface of the trolley body 100A. Examples of equipment include hand lifters, forklifts, picking robots, and medical equipment.
- AGV automatic guided vehicle
- the trolley 100 and the equipment are not limited to the configuration described above regarding the number and arrangement of the drive wheels 103 .
- the trolley 100 and equipment in the four-wheel configuration described above have a pair of driving wheels 103 attached to the front side of the trolley 100 and a driven wheel (a driven wheel that does not rotate on a single axis) attached to the rear side of the trolley 100.
- the trolley 100 and the equipment may have one driving wheel 103 and all the other wheels may be driven wheels in a form having three or more wheels.
- the trolley 100 and the equipment may have no driven wheels and all of the wheels may be drive wheels 103 in the form of three or more wheels. That is, the trolley 100 and the equipment need only have at least one drive wheel 103 in the form of three or more wheels.
- FIG. 1 is a perspective view showing a configuration example of a drive wheel
- FIG. 2 is a front view showing the drive wheel
- FIG. 3 is a side view showing the drive wheel.
- the drive wheel 103 includes an input portion 11, a turning portion 12, a spur gear mechanism (transmission mechanism) 13, an output portion 14, and a bevel gear mechanism 15 as a power conversion mechanism. , wheels 16 .
- the input unit 11 is arranged above the main body 101 , the upper end is fixed to the substrate 21 , and the substrate 21 is supported by the main body 101 by a plurality of (here, four) pillars 22 .
- the lower portion of the input portion 11 penetrates the main body 101 and extends downward.
- the turning portion 12 is arranged outside the lower portion of the input portion 11, and the horizontally shifted lower portion penetrates the main body 101 and extends downward.
- the spur gear mechanism 13 transmits the rotational force of the input portion 11 .
- the output unit 14 is rotated by the torque input from the input unit 11 .
- the bevel gear mechanism 15 transmits the rotational force of the output portion 14 to the wheels 16 .
- the wheels 16 are rotatable and steerable by the input rotational force.
- FIG. 4 is a sectional view taken along line AA of FIG. 2
- FIG. 5 is a sectional view taken along line BB of FIG. 4
- FIG. 6 is a sectional view taken along line CC of FIG.
- the input unit 11 has a two-shaft integrated motor 30, and can input two rotational forces onto the turning axis of the wheel 16.
- a cylindrical support cylinder 31 is fixed to the lower part of the substrate 21, and a first rotary cylinder 32A is supported inside the support cylinder 31 by a bearing 33A so as to be rotatable around the axis O1
- the second rotary cylinder 32B is supported by a bearing 33B so as to be rotatable around the axis O1.
- the support tube 31 is provided with coils (not shown) on its inner and outer peripheral surfaces.
- the first rotary cylinder 32A is provided with a magnet (not shown) on its outer peripheral surface, and is provided with a first input shaft 34A extending along the direction of the axis O1 at its lower portion.
- the second rotary cylinder 32B is provided with a magnet (not shown) on its inner peripheral surface, and is provided with a second input shaft 34B extending along the direction of the axis O1 at its lower part.
- the second input shaft 34B has a cylindrical shape and is arranged outside the first input shaft 34A.
- the first input shaft 34A and the second input shaft 34B penetrate the main body 101 and extend downward.
- the input unit 11 is configured by a motor 30 comprising a support tube 31, a first rotary tube 32A, and a second rotary tube 32B, a first input shaft 34A, and a second input shaft 34B. Therefore, when each coil of the support tube 31 is energized, the first input shaft 34A can be rotated via the first rotary tube 32A, and the second input shaft 34B can be rotated via the second rotary tube 32B. . On the other hand, when the coils of the support cylinder 31 are not energized, the first rotary cylinder 32A and the first input shaft 34A are rotatable with respect to the support cylinder 31, and the second rotary cylinder 32B and the second input shaft 34B are rotatable. It is rotatable. A turning shaft 35 is arranged outside the second input shaft 34B.
- the turning shaft 35 has a cylindrical shape, is arranged outside the second input shaft 34B, extends along the direction of the axis O1, and is rotatably supported around the axis O1. That is, the first input shaft 34A, the second input shaft 34B, and the turning shaft 35 are rotatably arranged coaxially along the axis O1.
- a bearing 43 is provided between the first input shaft 34A and the second input shaft 34B
- a bearing 44 is provided between the second input shaft 34B and the pivot shaft 35
- a bearing is provided between the pivot shaft 35 and the main body 101. 45 are provided.
- the swivel shaft 35 has a cylindrical body 35a and a flange portion 35b integrally provided at the bottom of the body 35a, and a cover member 35c is provided at the bottom of the flange portion 35b.
- the swivel shaft 35 is provided on both horizontal sides of the wheel 16 under the cover member 35c such that the first support member 36A and the second support member 36B extend downward.
- the wheel 16 is integrally provided with an axle 37 extending in the direction of the axis O2 orthogonal to the direction of the axis O1 at a position displaced in the horizontal direction from the central portion.
- the axle 37 has one end along the axis O2 direction rotatably supported under the first support member 36A, and the other end along the axis O2 direction rotatably under the second support member 36B.
- the swivel portion 12 is composed of a swivel shaft 35, a first support member 36A, and a second support member 36B. Therefore, the rotation axis O5 of the wheel 16 along the vertical direction intersecting the direction of the axis O2 of the axle 37 is displaced from the axis O1 of the turning shaft 35 in the horizontal direction orthogonal to the direction of the axis O2 of the axle 37. placed.
- a first drive spur gear 38A is fixed to the lower end of the first input shaft 34A, and a second drive spur gear 38B is fixed to the lower end of the second input shaft 34B.
- the first drive spur gear 38A meshes with the first driven spur gear 39A and the second drive spur gear 38B meshes with the second driven spur gear 39B.
- the second drive spur gear 38B and the first drive spur gear 38A are stacked vertically and rotate about the axis O1.
- the first driven spur gear 39A is fixed to the top of the first output shaft 40A.
- the first output shaft 40A is supported at its upper portion through the flange portion 35b and the cover member 35c of the swivel shaft 35, and supported at its lower portion by the first support member 36A so as to be rotatable around the axis O3.
- the second driven spur gear 39B is fixed to the top of the second output shaft 40B.
- the upper portion of the second output shaft 40B is supported by penetrating the flange portion 35b and the cover member 35c of the turning shaft 35, and the lower portion thereof is supported by the second support member 36B so as to be rotatable around the axis O4.
- the axis O3 and the axis O4 are parallel to the axis O1.
- the first drive spur gear 38A, the second drive spur gear 38B, the first driven spur gear 39A and the second drive spur gear 38B are covered with the pivot shaft 35 and the cover member 35c.
- the first driven spur gear 39A, the first drive spur gear 38A, the second drive spur gear 38B and the second driven spur gear 39B are arranged so that the axes O1, O3 and O4 form a triangle. That is, the rotation axis O5 of the wheel 16 is displaced from the axis O1 of the turning shaft 35 in the horizontal direction orthogonal to the direction of the axis O2 of the axle 37 .
- the first driven spur gear 39A and the first output shaft 40A, and the second driven spur gear 39B and the second output shaft 40B are arranged on both sides of the axle 37 with respect to the wheel 16 in the axial center O2 direction.
- the spur gears 38A, 38B, 39A, 39B have the same pitch diameter, tooth profile, number of teeth, etc., but may have different shapes. Gears 39A and 39B may have different shapes.
- the spur gear mechanism 13 has a first spur gear mechanism (first transmission mechanism) 13A and a second spur gear mechanism (second transmission mechanism) 13B.
- the first spur gear mechanism 13A includes a first drive spur gear 38A, It is composed of a first driven spur gear 39A
- the second spur gear mechanism 13B is composed of a second drive spur gear 38B and a second driven spur gear 39B.
- the output part 14 is comprised by 40A of 1st output shafts, and 2nd output shaft 40B.
- a first drive bevel gear 41A is fixed to the bottom of the first output shaft 40A, and a second drive bevel gear 41B is fixed to the bottom of the second output shaft 40B.
- the axle 37 has a first driven bevel gear 42A fixed to one end in the direction of the axis O2, and a second driven bevel gear 42B fixed to the other end in the direction of the axis O2.
- the first drive bevel gear 41A meshes with the first driven bevel gear 42A.
- the second drive bevel gear 41B meshes with the second driven bevel gear 42B.
- the bevel gear mechanism 15 has a first bevel gear mechanism 15A as a first power conversion mechanism and a second bevel gear mechanism 15B as a second power conversion mechanism.
- the first bevel gear mechanism 15A is composed of a first drive bevel gear 41A and a first driven bevel gear 42A.
- the second bevel gear mechanism 15B is composed of a second drive bevel gear 41B and a second driven bevel gear 42B.
- the driving wheels 103 can rotate and steer the wheels 16 by rotating the first input shaft 34A and the second input shaft 34B via the first rotating cylinder 32A and the second rotating cylinder 32B by the motor 30. That is, the first input shaft 34A is rotated, the second input shaft 34B is rotated in the opposite direction to the first input shaft 34A, and the number of revolutions (rotational speed) of the first input shaft 34A and the second input shaft 34B are kept the same. , the wheels 16 can be rotated without being steered. At this time, the wheels 16 can be steered while rotating or stopped by varying the number of revolutions (rotational speed) of the first input shaft 34A and the second input shaft 34B.
- FIG. 7 is a schematic diagram showing the driving force transmission path of the drive wheels.
- the first drive spur gear 38A rotates in the same direction
- the first driven gear 38A meshes with the first drive spur gear 38A.
- the spur gear 39A rotates in the second direction A2.
- the first driven spur gear 39A rotates in the second direction A2
- the first drive bevel gear 41A integrally provided with the first driven spur gear 39A via the first output shaft 40A rotates in the same direction.
- the first driven bevel gear 42A meshing with the first drive bevel gear 41A rotates in the third direction A3, and rotates the axle 37 integrated with the first driven bevel gear 42A in the same direction.
- the second input shaft 34B rotates in the first direction B1 opposite to the first direction A1
- the second drive spur gear 38B rotates in the same direction
- the second driven spur gear meshes with the second drive spur gear 38B.
- 39B rotates in the second direction B2.
- the second driven spur gear 39B rotates in the second direction B2
- the second drive bevel gear 41B integrally provided with the second driven spur gear 39B via the second output shaft 40B rotates in the same direction.
- the second driven bevel gear 42B meshing with the second drive bevel gear 41B rotates in the third direction B3, and rotates the axle 37 integrated with the second driven bevel gear 42B in the same direction.
- the third direction A3 and the third direction B3 are the same rotation direction, the wheel 16 rotates without turning if the first input shaft 34A and the second input shaft 34B have the same number of rotations.
- the drive wheels 103 are composed of the first input shaft 34A and the second input shaft 34B arranged coaxially, the first output shaft 40A and the second output shaft 40B arranged on separate shafts, and the first A first spur gear mechanism 13A that transmits the rotational force of the input shaft 34A to the first output shaft 40A; a second spur gear mechanism 13B that transmits the rotational force of the second input shaft 34B to the second output shaft 40B; A wheel 16 connected to the wheel 16, a turning shaft 35 that rotatably supports the wheel 16 via an axle 37, and a first bevel gear mechanism 15A that transmits the rotational force of the first output shaft 40A to one end of the axle 37. , and a second bevel gear mechanism 15B for transmitting the rotational force of the second output shaft 40B to the other end of the axle 37 .
- the driving wheel 103 is configured such that the rotational force of the first input shaft 34A and the second input shaft 34B is transferred to the first output shaft 40A and the second output shaft 40B via the first spur gear mechanism 13A and the second spur gear mechanism 13B. , and is transmitted from the first output shaft 40A and the second output shaft 40B to the respective ends of the axle 37 via the first bevel gear mechanism 15A and the second bevel gear mechanism 15B.
- the drive wheels 103 can switch between rotation and steering of the wheels 16 by adjusting the rotation speeds of the first input shaft 34A and the second input shaft 34B.
- the drive wheels 103 have the bevel gear mechanisms 15A and 15B arranged at the respective ends of the axle 37, the transmission system of the rotational force to the wheels 16 is simplified, thereby simplifying the structure. It is possible to secure a sufficient minimum ground clearance.
- the drive wheels 103 are configured so that the rotation axis O5 of the wheels 16 along the vertical direction intersecting the axis O2 of the axle 37 is aligned with the axis O1 of the turning shaft 35 in the horizontal direction orthogonal to the axis O2 of the axle 37 . are displaced from each other. Therefore, when the drive wheels 103 do not drive the wheels 16, the wheels 16 can passively turn by an external force acting from the horizontal direction. That is, the cart 100 can be automatically traveled and steered, and can be manually traveled and steered by the operator.
- the drive wheel 103 of this embodiment has a turning position detector 50 as shown in FIGS.
- the turning position detector 50 is provided on the main body 101 .
- the turning position detection unit 50 includes a first spur gear 50a that rotates around the axis O1 together with the turning shaft 35, and a second spur gear 50a that meshes with the first spur gear 50a and rotates around an axis parallel to the axis O1. It has a spur gear 50b and a detector 50c that detects the rotational position of the second spur gear 50b. Therefore, the first spur gear 50a rotates together with the turning shaft 35, and the rotational position of the first spur gear 50a is detected by the detector 50c as the rotational position of the second spur gear 50b.
- a detection signal from the detector 50 c is input to the control device 105 of the truck 100 .
- the control device 105 can control the turning of the drive wheels 103 .
- FIG. 8 is a perspective view illustrating a technique for improving driving efficiency of drive wheels.
- FIG. 9 is a perspective view illustrating a technique for improving driving efficiency of drive wheels.
- R1 is the radius of the wheel 16 (referred to as wheel radius) [mm].
- R2 is the distance between the axis O1 of the turning shaft 35 and the rotation axis O5, and is the turning radius [mm] of the axle 37 corresponding to the amount of deviation in the horizontal direction.
- n1 is the rotation speed of the wheel 16 (referred to as wheel rotation speed) [s].
- n2 is the rotation speed of the turning shaft 35 (referred to as turning shaft rotation speed) [s].
- V1 is the rotation speed of the wheel 16 (referred to as wheel rotation speed) [m/s].
- V2 is the rotation speed (referred to as the steering rotation speed) [m/s] when the wheel 16 kicks the floor G (see FIG. 14) in turning about the turning shaft 35 .
- n1 n2(R2/R1) (4)
- the gear ratio of the meshing gears so as to be the speed reduction ratio of formula (5) or a value close to the speed reduction ratio, it is possible to efficiently move the wheels 16 by the differential method.
- the drive wheels 103 have a ratio R2/R1 between the wheel radius R1 and the turning radius R2 shown in FIG. 8 of 2/3.
- the drive wheel 103 is such that the number of teeth of the first drive spur gear 38A and the first driven spur gear 39A of the first spur gear mechanism 13A is the same (for example, 30), and the second spur gear mechanism The number of teeth of the second driving spur gear 38B and the second driven spur gear 39B of 13B is the same (for example, 30).
- the number of teeth of the first drive bevel gear 41A of the first bevel gear mechanism 15A is set to 20, for example, and the first driven bevel gear 42A is set to 2/3 or a value close to 2/3.
- the drive wheels 103 can operate to efficiently move the wheels 16 in a differential manner.
- the number of teeth of the first driving bevel gear 41A of the first bevel gear mechanism 15A and the number of teeth of the second driving bevel gear 41B of the second bevel gear mechanism 15B are the ratio R2 between the wheel radius R1 and the turning radius R2. /R1 is preferred, but a value close to R2/R1 ((R2/R1) ⁇ 10%) may also be used.
- the driving wheel 103 has a ratio R2/R1 between the wheel radius R1 and the turning radius R2 shown in FIG. 8 of 2/3.
- the drive wheel 103 has the same number of teeth (for example, 30) between the first drive bevel gear 41A and the first driven bevel gear 42A of the first bevel gear mechanism 15A, and the second bevel gear mechanism 15B.
- the number of teeth of the second drive bevel gear 41B and the second driven bevel gear 42B are the same (for example, 30).
- the number of teeth of the first drive spur gear 38A of the first spur gear mechanism 13A is, for example, 78, and the first driven spur gear 39A
- the number of teeth of the second drive spur gear 38B of the second spur gear mechanism 13B is 78
- the number of teeth of the second driven spur gear 39B is 52, for example.
- the number of teeth of the first drive spur gear 38A of the first spur gear mechanism 13A and the number of teeth of the second drive spur gear 38B of the second spur gear mechanism 13B are the ratio R2 between the wheel radius R1 and the turning radius R2. /R1 is preferred, but a value close to R2/R1 ((R2/R1) ⁇ 10%) may also be used.
- FIG. 10 is a partial perspective view showing an example of the power conversion mechanism.
- FIG. 11 is a partial perspective view showing an example of the power conversion mechanism.
- FIG. 12 is a partial perspective view showing an example of the power conversion mechanism.
- FIG. 13 is a partial front view showing an example of the power conversion mechanism.
- the power conversion mechanism is the bevel gear mechanism 15 having the first bevel gear mechanism 15A and the second bevel gear mechanism 15B, but this is not the only option.
- FIG. 10 shows a helical gear mechanism 17 as an example of a power conversion mechanism that replaces the bevel gear mechanism 15.
- the helical gear mechanism 17 transmits the rotational force of the output portion 14 to the wheels 16 .
- the helical gear mechanism 17 has a first helical gear mechanism 17A as a first power conversion mechanism and a second helical gear mechanism 17B as a second power conversion mechanism.
- the first helical gear mechanism 17A includes a first drive helical gear 51A fixed to the lower portion of the first output shaft 40A and one end of the axle 37 provided on the wheel 16 in the direction of the axis O2. and a first driven helical gear 52A meshing with the first drive helical gear 51A.
- the second helical gear mechanism 17B includes a second driving helical gear 51B fixed to the lower portion of the second output shaft 40B, and a second driving helical gear 51B fixed to the other end of the axle 37 in the direction of the axis O2.
- a second driven helical gear 52B meshing with the helical gear 51B.
- the rotational forces of the first input shaft 34A and the second input shaft 34B are transferred to the first output shaft 40A and the second output shaft 40B via the first spur gear mechanism 13A and the second spur gear mechanism 13B. It is transmitted from the first output shaft 40A and the second output shaft 40B to each end of the axle 37 via the first helical gear mechanism 17A and the second helical gear mechanism 17B.
- the rotation and steering of the wheels 16 can be switched.
- the driving wheel 103 has the number of teeth of the first driving helical gear 51A and the first driven helical gear 52A, and the number of teeth of the second driving helical gear 51B and the second driven helical gear. 52B, the ratio R2/R1 between the wheel radius R1 and the turning radius R2 shown in FIG. 8, or a value close to R2/R1 ((R2/R1) ⁇ 10%).
- the number of teeth of the driving wheel 103 is the same, the number of teeth of the first driving spur gear 38A and the first driven spur gear 39A of the first spur gear mechanism 13A and the number of teeth of the second spur gear are the same as described above.
- the number of teeth of the second drive spur gear 38B and the second driven spur gear 39B of the mechanism 13B is shown in FIG. 10%).
- the drive wheels 103 can operate to efficiently move the wheels 16 in a differential manner.
- FIG. 11 shows a worm gear mechanism 18 as an example of a power conversion mechanism that replaces the bevel gear mechanism 15 .
- the worm gear mechanism 18 transmits the rotational force of the output portion 14 to the wheels 16 .
- the worm gear mechanism 18 has a first worm gear mechanism 18A as a first power conversion mechanism and a second worm gear mechanism 18B as a second power conversion mechanism.
- the first worm gear mechanism 18A includes a first worm 61A fixed to the lower portion of the first output shaft 40A, and one end of an axle 37 provided on the wheel 16 in the axial center O2 direction. It is composed of the first worm wheel 62A that meshes with it.
- the second worm gear mechanism 18B includes a second worm 61B fixed to the lower portion of the second output shaft 40B, and a second worm wheel fixed to the other end of the axle 37 in the axial center O2 direction and meshing with the second worm 61B. 62B.
- the rotational forces of the first input shaft 34A and the second input shaft 34B are transferred to the first output shaft 40A and the second output shaft 40B via the first spur gear mechanism 13A and the second spur gear mechanism 13B. , and is transmitted from the first output shaft 40A and the second output shaft 40B to each end of the axle 37 via the first worm gear mechanism 18A and the second worm gear mechanism 18B.
- the drive wheel 103 has a wheel radius R1 shown in FIG. and turning radius R2, or a value close to R2/R1 ((R2/R1) ⁇ 10%).
- the number of teeth of the driving wheel 103 is the same, the number of teeth of the first driving spur gear 38A and the first driven spur gear 39A of the first spur gear mechanism 13A and the number of teeth of the second spur gear are the same as described above.
- the number of teeth of the second driving spur gear 38B and the second driven spur gear 39B of the mechanism 13B is the ratio R2/R1 between the wheel radius R1 and the turning radius R2 shown in FIG. R1) ⁇ 10%).
- the drive wheels 103 can operate to efficiently move the wheels 16 in a differential manner.
- the first worm gear mechanism 18A has a first worm wheel 62A fixed to the lower portion of the first output shaft 40A, and a first worm 61A fixed to one end of the axle 37 in the axial center O2 direction. good too.
- the second worm gear mechanism 18B has a second worm wheel 62B fixed to the lower portion of the second output shaft 40B, and a second worm 61B fixed to the other end of the axle 37 in the axial center O2 direction.
- FIG. 12 shows a crown gear mechanism 19 as an example of a power conversion mechanism that replaces the bevel gear mechanism 15 .
- the crown gear mechanism 19 transmits the rotational force of the output section 14 to the wheels 16 .
- the crown gear mechanism 19 has a first crown gear mechanism 19A as a first power conversion mechanism and a second crown gear mechanism 19B as a second power conversion mechanism.
- the first crown gear mechanism 19A includes a first crown gear 71A fixed to the lower portion of the first output shaft 40A, and a first crown gear fixed to one end of an axle 37 provided on the wheel 16 in the direction of the axis O2.
- a first spur gear 72A meshing with 71A.
- the second crown gear mechanism 19B includes a second crown gear 71B fixed to the lower portion of the second output shaft 40B and a second crown gear 71B fixed to the other end of the axle 37 in the axial center O2 direction and meshing with the second crown gear 71B. spur gear 72B.
- the rotational forces of the first input shaft 34A and the second input shaft 34B are transferred to the first output shaft 40A and the second output shaft 40B via the first spur gear mechanism 13A and the second spur gear mechanism 13B. , and is transmitted from the first output shaft 40A and the second output shaft 40B to each end of the axle 37 via the first crown gear mechanism 19A and the second crown gear mechanism 19B.
- the driving wheel 103 has the number of teeth of the first crown gear 71A and the first spur gear 72A, and the number of teeth of the second crown gear 71B and the second spur gear 72B.
- the ratio of radius R1 to turning radius R2 is R2/R1, or a value close to R2/R1 ((R2/R1) ⁇ 10%).
- the number of teeth of the driving wheel 103 is the same, the number of teeth of the first driving spur gear 38A and the first driven spur gear 39A of the first spur gear mechanism 13A and the number of teeth of the second spur gear are the same as described above.
- the number of teeth of the second driving spur gear 38B and the second driven spur gear 39B of the mechanism 13B is the ratio R2/R1 between the wheel radius R1 and the turning radius R2 shown in FIG. R1) ⁇ 10%).
- the drive wheels 103 can operate to efficiently move the wheels 16 in a differential manner.
- the first crown gear mechanism 19A has a first spur gear 72A fixed to the lower portion of the first output shaft 40A, and a first crown gear 71A fixed to one end of the axle 37 in the axial center O2 direction.
- the second crown gear mechanism 19B has a second spur gear 72B fixed to the lower portion of the second output shaft 40B, and a second crown gear 71B fixed to the other end of the axle 37 in the axial center O2 direction.
- FIG. 13 shows a universal joint mechanism (universal joint mechanism) 20 as an example of a power conversion mechanism that replaces the bevel gear mechanism 15 .
- the universal joint mechanism 20 transmits the rotational force of the output section 14 to the wheels 16 .
- the universal joint mechanism 20 has a first universal joint mechanism 20A as a first power conversion mechanism and a second universal joint mechanism 20B as a second power conversion mechanism.
- the first universal joint mechanism 20A includes a first drive joint 81A fixed to the lower end of the first output shaft 40A, and a first driven joint 82A fixed to one end of the axle 37 provided on the wheel 16 in the axial center O2 direction. and a first connecting portion 83A connecting the first drive joint 81A and the first driven joint 82A.
- the second universal joint mechanism 20B includes a second drive joint 81B fixed to the lower end of the second output shaft 40B, a second driven joint 82B fixed to the other end of the axle 37 in the direction of the axis O2, and a second drive joint 81B. It is composed of a second connecting portion 83B that connects the joint 81B and the second driven joint 82B.
- the first universal joint mechanism 20A has one end of the first connecting portion 83A fixed to the lower end of the first output shaft 40A, and the other end of the first connecting portion 83A connected to the axis of the axle 37.
- the second universal joint mechanism 20B has one end of the second connecting portion 83B fixed to the lower end of the second output shaft 40B, and the other end of the second connecting portion 83B connected to the shaft of the axle 37. It may be fixed to the other end in the direction of the center O2, and a single or a plurality of joints corresponding to the second drive joint 81B and the second driven joint 82B may be provided in the intermediate portion.
- the rotational forces of the first input shaft 34A and the second input shaft 34B are transferred to the first output shaft 40A and the second output shaft 40B via the first spur gear mechanism 13A and the second spur gear mechanism 13B. , and is transmitted from the first output shaft 40A and the second output shaft 40B to each end of the axle 37 via the first universal joint mechanism 20A and the second universal joint mechanism 20B.
- the rotation and steering of the wheels 16 can be switched.
- the drive wheel 103 has the number of teeth of the first driving spur gear 38A and the first driven spur gear 39A of the first spur gear mechanism 13A and the number of teeth of the second driving spur gear 39A of the second spur gear mechanism 13B, as described above.
- the number of teeth of 38B and second driven spur gear 39B is set to ratio R2/R1 between wheel radius R1 and turning radius R2 shown in FIG. 8, or a value close to R2/R1 ((R2/R1) ⁇ 10%). .
- the drive wheels 103 can operate to efficiently move the wheels 16 in a differential manner.
- the first output shaft 40A and the second output shaft 40B are arranged on both sides of the axle 37 with respect to the wheel 16 in the axial center O2 direction. Therefore, the drive wheels 103 receive rotational force from both sides of the axle 37 in the direction of the axis O2, and the differential mechanism for steering the wheels 16 can be simplified.
- the first bevel gear mechanism 15A and the second bevel gear mechanism 15B are arranged on both sides of the axle 37 in the direction of the axis O2 with respect to the wheel 16. Therefore, the drive wheels 103 receive rotational force from both sides of the axle 37 in the direction of the axis O2, so that the differential mechanism for steering the wheels 16 can be simplified.
- the first bevel gear mechanism 15A and the second bevel gear mechanism 15B are arranged above the axle 37 in the vertical direction intersecting the axial center O2 direction. Therefore, the driving wheel 103 does not need to arrange the bevel gear mechanisms 15A and 15B on both sides of the axle 37 in the direction of the axis O2, and the differential mechanism can be made compact.
- a first support member 36A and a second support member 36B are connected to the turning shaft 35 on both sides of the wheel 16 in the direction of the axis O2 of the axle 37.
- the ends are rotatably supported by the first support member 36A and the second support member 36B. Therefore, the drive wheels 103 can simplify the differential mechanism for steering the wheels 16 .
- the turning shaft 35 is arranged coaxially with the first input shaft 34A and the second input shaft 34B. Therefore, the driving wheel 103 can be downsized and simplified in structure.
- the carriage 100 described above includes drive wheels 103 and a main body 101 to which the drive wheels 103 are attached. Therefore, the structure can be simplified and a sufficient minimum ground clearance can be ensured.
- the first power conversion mechanism (the first bevel gear mechanism 15A, the first helical gear mechanism 17A, the first worm gear mechanism 18A, the first The single crown gear mechanism 19A, the first universal joint mechanism 20A) transmits the rotational force of the first output shaft 40A to one end of the axle 37 having a different axial direction with respect to the first output shaft 40A. Further, the axial directions of the second output shaft 40B and the axle 37 are different from each other by 90 degrees.
- the second power conversion mechanism (second bevel gear mechanism 15B, second helical gear mechanism 17B, second worm gear mechanism 18B, The second crown gear mechanism 19B, the second universal joint mechanism 20B) transmits the rotational force of the second output shaft 40B to the other end of the axle 37 having a different axial direction with respect to the second output shaft 40B.
- the input unit 11 has the two-shaft integrated motor 30, and is configured to input two rotational forces onto the turning axis of the wheel 16, so that the first input shaft 34A, the second input shaft 34B, and the turning shaft 35 are coaxially rotatably arranged along the axis O1. Furthermore, in the driving wheels 103, the rotational forces of the first input shaft 34A and the second input shaft 34B are transferred to the first output shaft 40A and the second output shaft 40B via the first spur gear mechanism 13A and the second spur gear mechanism 13B. , the axis O3 of the first output shaft 40A and the axis O4 of the second output shaft 40B are parallel to the axis O1.
- first power conversion mechanism first bevel gear mechanism 15A, first helical gear mechanism 17A, first worm gear mechanism 18A, first crown gear mechanism 19A, first universal joint mechanism 20A
- second A power conversion mechanism second bevel gear mechanism 15B, second helical gear mechanism 17B, second worm gear mechanism 18B, second crown gear mechanism 19B, second universal joint mechanism 20B
- the power conversion mechanism is not limited to the configuration described above, and may be configured to transmit the rotational force of the output shafts 40A and 40B to the axle 37 having a different axial direction than the output shafts 40A and 40B.
- FIG. 15 is a front view of essential parts showing a modification of the drive wheel
- FIG. 16 is a side view of essential parts showing a modification of the drive wheel.
- Members having functions similar to those of the drive wheel 103 described above are denoted by the same reference numerals, and detailed description thereof is omitted.
- the drive wheel 121 includes an input portion 11, a turning portion 12, a spur gear mechanism 13, an output portion 14 (14A, 14B), and a bevel gear mechanism 15 as a power conversion mechanism. (15A, 15B), a power transmission mechanism 81, and wheels 16.
- the input portion 11, the turning portion 12, and the spur gear mechanism 13 are the same as the drive wheels 103 described above, as shown in FIGS.
- the first input shaft 34A, the second input shaft 34B, and the turning shaft 35 are coaxially rotatably arranged along the axis O1.
- a first drive spur gear 38A is fixed to the lower end of the first input shaft 34A, and a second drive spur gear 38B is fixed to the lower end of the second input shaft 34B.
- the first drive spur gear 38A meshes with the first driven spur gear 39A and the second drive spur gear 38B meshes with the second driven spur gear 39B.
- the second drive spur gear 38B and the first drive spur gear 38A are stacked vertically and rotate about the axis O1.
- the first driven spur gear 39A is fixed to the upper portion of the first output shaft 40A, and the first output shaft 40A is rotatably supported by the turning shaft 35 about the axis O3.
- the second driven spur gear 39B is fixed to the upper portion of the second output shaft 40B, and the second output shaft 40B is rotatably supported by the swivel shaft 35 about the axis O4.
- a first drive bevel gear 41A is fixed to the bottom of the first output shaft 40A, and a second drive bevel gear 41B is fixed to the bottom of the second output shaft 40B.
- a first driven bevel gear 42A that meshes with the first drive bevel gear 41A and a second driven bevel gear 42B that meshes with the second drive bevel gear 41B are fixed to the connecting shaft 91 .
- the connecting shaft 91 is perpendicular to the axis O1 and parallel to the axis O2.
- a first power transmission mechanism 81A is provided between the first bevel gear mechanism 15A and one end of the axle 37, and a second power transmission mechanism 81B is provided between the second bevel gear mechanism 15B and the other end of the axle 37. be provided.
- the bevel gear mechanism 15 has a first bevel gear mechanism 15A as a first power conversion mechanism and a second bevel gear mechanism 15B as a second power conversion mechanism. 41A and a first driven bevel gear 42A, and the second bevel gear mechanism 15B is composed of a second drive bevel gear 41B and a second driven bevel gear 42B.
- the first power conversion mechanism includes the first helical gear mechanism 17A, the first worm gear mechanism 18A, and the first crown gear mechanism instead of the first bevel gear mechanism 15A.
- the first universal joint mechanism 20A can be applied
- the second power conversion mechanism is the second helical gear mechanism 17B, the second worm gear mechanism 18B, and the second crown gear mechanism instead of the second bevel gear mechanism 15B.
- the second universal joint mechanism 20B can be applied.
- the connecting shaft 91 has a first drive pulley 92A fixed to one end in the direction of the axis O6, and a second drive pulley 92B fixed to the other end in the direction of the axis O6.
- a first driven pulley 93A is fixed to one end of the axle 37 in the direction of the axis O2, and a second driven pulley 93B is fixed to the other end in the direction of the axis O2.
- An endless first driving belt 94A is wound between the first driving pulley 92A and the first driven pulley 93A, and an endless second driving belt is wound between the second driving pulley 92B and the second driven pulley 93B.
- 94B is hung around.
- the first power transmission mechanism 81A includes a first drive pulley 92A, a first driven pulley 93A, and a first drive belt 94A
- the second power transmission mechanism 81B includes a second drive pulley 92B and a second driven pulley. 93B and a second drive belt 94B.
- the driving wheel 121 has a sprocket consisting of the first driving pulley 92A and the first driven pulley 93A, a chain consisting of the first driving belt 94A, and a sprocket consisting of the second driving pulley 92B and the second driven pulley 93B.
- the second drive belt 94B may be a chain.
- the driving wheel 121 has the first driving pulley 92A and the first driven pulley 93A as spur gears, the first driving belt 94A as spur gears meshing with the spur gears, and the second driving pulley 92B.
- the second driven pulley 93B may be a spur gear
- the second driving belt 94B may be replaced by a spur gear meshing with each spur gear.
- the drive wheel 121 is a propeller having bevel gears at both ends that mesh with each other between the bevel gear provided at one end of the axle 37 and the first driven bevel gear 42A.
- a propeller shaft may be provided between the bevel gear provided on the other end of the axle 37 and the second driven bevel gear 42B, the propeller shaft having bevel gears meshing with each other at both ends.
- the driving wheels 121 can rotate and steer the wheels 16 by rotating the first input shaft 34A and the second input shaft 34B via the first rotating cylinder 32A and the second rotating cylinder 32B by the motor 30. . That is, the first input shaft 34A is rotated, the second input shaft 34B is rotated in the opposite direction to the first input shaft 34A, and the number of revolutions (rotational speed) of the first input shaft 34A and the second input shaft 34B are kept the same. , the wheels 16 can be rotated without being steered. At this time, the wheels 16 can be steered while rotating or stopped by varying the number of revolutions (rotational speed) of the first input shaft 34A and the second input shaft 34B.
- the first power transmission mechanism 81A is provided between the first bevel gear mechanism 15A and one end of the axle 37
- the power transmission mechanism 81A is provided between the second bevel gear mechanism 15B and the other end of the axle 37. is provided with a second power transmission mechanism 81B. Therefore, the driving wheels 121 can easily transmit the driving force of the bevel gear mechanisms 15A and 15B to the axle 37 by the power transmission mechanisms 81A and 81B.
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Abstract
Description
図14は、の台車の構成例を表す概略図である。
NW=(1/2)NA-(1/2)NB
NS=-(1/2)NA-(1/2)NB
NA=NW-NS
NB=-NW-NS
V1=2π×R1×n1・・・(1)
V2=2π×R2×n2・・・(2)
R1×n1=R2×n2・・・(3)
n1=n2(R2/R1)・・・(4)
R2/R1・・・(5)
図15は、駆動輪の変形例を表す要部正面図、図16は、駆動輪の変形例を表す要部側面図である。なお、上述した駆動輪103と同様の機能を有する部材には、同一の符号を付して詳細な説明は省略する。
12 旋回部
13 平歯車機構(伝達機構)
13A 第一平歯車機構(第一伝達機構)
13B 第二平歯車機構(第二伝達機構)
14 出力部
15 傘歯車機構(動力変換機構)
15A 第一傘歯車機構(第一動力変換機構)
15B 第二傘歯車機構(第二動力変換機構)
16 車輪
17 はすば歯車機構(動力変換機構)
17A 第一はすば歯車機構(第一動力変換機構)
17B 第二はすば歯車機構(第二動力変換機構)
18 ウォーム歯車機構(動力変換機構)
18A 第一ウォーム歯車機構(第一動力変換機構)
18B 第二ウォーム歯車機構(第二動力変換機構)
19 冠歯車機構(動力変換機構)
19A 第一冠歯車機構(第一動力変換機構)
19B 第二冠歯車機構(第二動力変換機構)
20 自在継手機構
20A 第一自在継手機構
20B 第二自在継手機構
30 モータ
31 支持筒
32A 第一回転筒
32B 第二回転筒
33A 軸受
33B 軸受
34A 第一入力軸
34B 第二入力軸
35 旋回軸
36A 第一支持部材
36B 第二支持部材
37 車軸
38A 第一駆動平歯車
38B 第二駆動平歯車
39A 第一従動平歯車
39B 第二従動平歯車
40A 第一出力軸
40B 第二出力軸
41A 第一駆動傘歯車
41B 第二駆動傘歯車
42A 第一従動傘歯車
42B 第二従動傘歯車
43,44,45 軸受
81 動力伝達機構
81A 第一動力伝達機構
81B 第二動力伝達機構
91 連結軸
92A 第一駆動プーリ
92B 第二駆動プーリ
93A 第一従動プーリ
93B 第二従動プーリ
94A 第一駆動ベルト
94B 第二駆動ベルト
100 台車
100A 台車本体
102 取手部
103,121 駆動輪
104 電源部
105 制御装置
106 操作部
Claims (10)
- 同軸上に配置される第一入力軸及び第二入力軸と、
別軸上に配置される第一出力軸及び第二出力軸と、
前記第一入力軸の回転力を前記第一出力軸に伝達する第一伝達機構と、
前記第二入力軸の回転力を前記第二出力軸に伝達する第二伝達機構と、
車軸に連結される車輪と、
前記車軸を介して前記車輪を旋回可能に支持する旋回軸と、
前記第一出力軸の回転力を前記車軸の一端部に伝達する第一動力変換機構と、
前記第二出力軸の回転力を前記車軸の他端部に伝達する第二動力変換機構と、
を備え、
前記車軸の軸心に交差して鉛直方向に沿う前記車輪の回転軸心が、前記旋回軸の軸心に対して前記車軸の軸心に直交する水平方向にずれて配置される、駆動輪であって、
前記車輪の半径R1と、前記回転軸心と前記旋回軸の軸心との軸間距離R2と、前記車輪の回転数n1と、前記旋回軸の回転数n2と、前記車輪の回転速度V1と、前記旋回軸の旋回にて前記車輪が床面を蹴るときの操舵回転速度V2と、において、V1=V2のとき、
V1=2π×R1×n1、V2=2π×R2×n2、n1=n2(R2/R1)、の関係を満たす、駆動輪。 - 前記第一動力変換機構及び前記第二動力変換機構の減速比、または前記第一動力変換機構及び前記第二動力変換機構の噛み合う歯車の歯数比を、(R2/R1)±10%の関係とする、請求項1に記載の駆動輪。
- 前記第一伝達機構及び前記第二伝達機構の減速比、または前記第一伝達機構及び前記第二伝達機構の噛み合う歯車の歯数比を、R2/R1の関係とする、請求項1に記載の駆動輪。
- 前記第一出力軸と前記第二出力軸は、前記車輪に対して前記車軸の軸心方向における両側に配置される、請求項1から請求項3のいずれか一項に記載の駆動輪。
- 前記第一動力変換機構と前記第二動力変換機構は、前記車輪に対して前記車軸の軸心方向における両側に配置される、請求項1から請求項4のいずれか一項に記載の駆動輪。
- 前記第一動力変換機構と前記第二動力変換機構は、前記車軸の軸心方向に交差する鉛直方向における上方に配置される、請求項5に記載の駆動輪。
- 前記第一動力変換機構と前記車軸の一端部との間に第一動力伝達機構が設けられ、前記第二動力変換機構と前記車軸の他端部との間に第二動力伝達機構が設けられる、請求項6に記載の駆動輪。
- 前記第一動力変換機構は、前記第一出力軸の回転力を前記第一出力軸に対して軸心方向の異なる前記車軸の一端部に伝達するもので、傘歯車機構、はすば歯車機構、ウォーム歯車機構、冠歯車機構、または自在継手機構のいずれか1つが適用され、前記第二動力変換機構は、前記第二出力軸の回転力を前記第二出力軸に対して軸心方向の異なる前記車軸の一端部に伝達するもので、傘歯車機構、はすば歯車機構、ウォーム歯車機構、冠歯車機構、または自在継手機構のいずれか1つが適用される、請求項1から請求項7のいずれか一項に記載の駆動輪。
- 前記旋回軸は、前記車輪に対して前記車軸の軸心方向における両側に第一支持部材及び第二支持部材が連結され、前記車軸は、軸心方向の各端部が前記第一支持部材及び前記第二支持部材に回転自在に支持される、請求項1から請求項8のいずれか一項に記載の駆動輪。
- 請求項1から請求項9のいずれか一項に記載の駆動輪と、
前記駆動輪が取付けられる台車本体と、
を備える、台車。
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EP22791294.6A EP4328464A1 (en) | 2021-04-20 | 2022-01-17 | Driving wheel and carriage |
US18/037,186 US20230406387A1 (en) | 2021-04-20 | 2022-01-17 | Drive wheel and cart |
CN202280028970.5A CN117222827A (zh) | 2021-04-20 | 2022-01-17 | 驱动轮以及台车 |
JP2022541204A JP7298783B2 (ja) | 2021-04-20 | 2022-01-17 | 駆動輪及び台車 |
KR1020237037805A KR20230165317A (ko) | 2021-04-20 | 2022-01-17 | 구동륜 및 대차 |
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WO2010147100A1 (ja) * | 2009-06-19 | 2010-12-23 | 国立大学法人豊橋技術科学大学 | 操舵可能な駆動機構および全方向移動車 |
JP2020024033A (ja) | 2018-07-31 | 2020-02-13 | 日本精工株式会社 | 駆動輪及び台車 |
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WO2010147100A1 (ja) * | 2009-06-19 | 2010-12-23 | 国立大学法人豊橋技術科学大学 | 操舵可能な駆動機構および全方向移動車 |
JP2020024033A (ja) | 2018-07-31 | 2020-02-13 | 日本精工株式会社 | 駆動輪及び台車 |
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KR20230165317A (ko) | 2023-12-05 |
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