WO2022091353A1 - 作業車 - Google Patents

作業車 Download PDF

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Publication number
WO2022091353A1
WO2022091353A1 PCT/JP2020/040853 JP2020040853W WO2022091353A1 WO 2022091353 A1 WO2022091353 A1 WO 2022091353A1 JP 2020040853 W JP2020040853 W JP 2020040853W WO 2022091353 A1 WO2022091353 A1 WO 2022091353A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
work vehicle
accommodating portion
opening
wheel
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2020/040853
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
杉村健太郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to PCT/JP2020/040853 priority Critical patent/WO2022091353A1/ja
Priority to DE112020007746.2T priority patent/DE112020007746T5/de
Priority to US18/250,627 priority patent/US12151732B2/en
Priority to JP2022558760A priority patent/JP7434596B2/ja
Publication of WO2022091353A1 publication Critical patent/WO2022091353A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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
    • B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
    • 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
    • B62B3/08—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving tiltably-mounted containers
    • 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
    • B62B5/0053—Arrangements of batteries
    • 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
    • B62B5/06—Hand moving equipment, e.g. handle bars
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0455—Removal or replacement of the energy storages
    • B60K2001/0466—Removal or replacement of the energy storages from above
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0455—Removal or replacement of the energy storages
    • B60K2001/0494—Removal or replacement of the energy storages with arrangements for sliding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/60—Industrial applications, e.g. pipe inspection vehicles
    • B60Y2200/62—Conveyors, floor conveyors

Definitions

  • the present invention relates to a work vehicle provided with a loading unit for loading a load to be loaded.
  • a transport trolley which is a type of work vehicle, has a traveling portion including traveling wheels made of wheels, rollers, and the like, and a loading portion provided above the traveling portion.
  • the loading unit is, for example, a bucket (hopper), and is loaded with loads such as earth and sand and cargo.
  • US Patent Application Publication No. 2014/01/46386 proposes the adoption of a motor as a traveling drive source for such a carrier. The motor is powered by the battery.
  • Japanese Patent Application Laid-Open No. 2001-239938 describes an electric trolley in which a traveling wheel is provided below a frame-shaped loading platform and a battery is arranged behind the loading platform in the traveling direction.
  • the electric assist function is turned on / off by the operator operating the switch, and when the electric trolley is turned on, the electric assist force is added to the force for the operator to move the electric trolley.
  • a main object of the present invention is to provide a work vehicle capable of maintaining a stable posture even when an object to be loaded is loaded on the loading unit.
  • the work vehicle includes an electric drive source driven by electric power and a traveling unit driven by the electric drive source. At least a part of the traveling portion is provided on the upper part of the portion on the first direction side, and the loading portion for loading the load is loaded. At least a part thereof is a removable battery storage portion provided in the upper part of the portion of the traveling portion on the second direction side opposite to the first direction. Equipped with The detachable battery accommodating portion has an accommodating portion capable of accommodating a detachable battery that supplies electric power to the electric drive source, and an opening formed in the upper part of the accommodating portion for inserting or taking out the detachable battery. Have, A work vehicle is provided in which the opening is directed upward and the axis of the accommodating portion along the battery attachment / detachment direction is inclined toward the first direction or the second direction.
  • the "reverse direction” means the other direction side with respect to the one direction side, and more specifically, the "opposite side direction".
  • the second direction is the back side of the worker.
  • the traveling portion is a work vehicle including a crawler, it is generally recognized that "the side on which the drive sprocket is arranged is the rear". Therefore, when the side on which the drive sprocket is not arranged is set as the first direction, the front side of the work vehicle is the first direction and the rear side is the second direction.
  • the loading unit and the removable battery storage unit are arranged in opposite directions to each other, when the load is loaded on the loading unit and a load acts on the first direction side of the work vehicle. Even so, the load (or weight) can be substantially balanced between the first direction side and the second direction side. As a result, it is possible to prevent the posture of the work vehicle from becoming unstable, so that various operations such as transportation work by the work vehicle can be smoothly carried out.
  • the opening of the detachable battery accommodating portion is directed upward, and the axis of the accommodating portion accommodating the detachable battery along the battery attachment / detachment direction is inclined toward the first direction or the second direction. ing.
  • the inner wall of the accommodating portion for example, facing downward, receives a part of the weight of the removable battery. That is, the accommodating portion bears the load of the removable battery. Therefore, the force when the operator pushes the detachable battery into and out of the accommodating portion can be reduced as compared with the case where the axis of the detachable battery accommodating portion extends along the vertical direction. In other words, the removable battery can be easily attached to and detached from the accommodating portion.
  • the center of gravity of the detachable battery accommodating portion is set to the second position from the loading portion as compared with the state where the detachable battery accommodating portion is not inclined. It becomes easy to separate in the direction side of. Therefore, it becomes easier to balance the weights of the loading portion (first direction side) on which the load is loaded and the removable battery storage portion (second direction side). Therefore, the unstable posture of the work vehicle can be further suppressed, and the above-mentioned work can be performed more smoothly.
  • FIG. 4 is a schematic vertical sectional view of a main part showing a state in which the posture of the detachable battery is changed from FIG.
  • a transport cart which is also called a dump cart
  • front (direction) refers to the front of the operator holding the operation handle in FIG. 1
  • rear (direction) refers to the opposite direction, that is, the back side of the operator. ..
  • FIG. 1 is a schematic overall side view of the transport carriage 10.
  • the transport carriage 10 includes a traveling unit 12.
  • the traveling unit 12 is supported by the main frame 14 and is located at the rear (backward side) of the two drive wheels 16, and is also supported by the main frame 14 and is located at the front (forward side) of the traveling direction.
  • the transport carriage 10 moves forward.
  • the transport carriage 10 retracts.
  • the driven wheel 18 is the first wheel, and the driving wheel 16 is the second wheel.
  • the lowest position of the drive wheel 16 and the driven wheel 18 is the ground contact portion 12bo that comes into contact with the ground G, and is the lowest position of the traveling portion 12.
  • the front (direction) is defined as the "first direction”
  • the opposite direction “rear (direction)” is defined as the "second direction”.
  • the driven wheel 18 is arranged on the first directional side of the transport trolley 10
  • the drive wheel 16 is arranged on the second directional side of the transport trolley 10.
  • a motor 20 is supported in the vicinity of the rear end (end on the second direction side) of the main frame 14.
  • the motor 20 is a power drive source that receives and drives power from a detachable battery (hereinafter, also simply referred to as “battery”) 22 described later.
  • a power drive unit (PDU) 23 that converts the DC power of the battery 22 into AC power is provided adjacent to the upper part of the motor 20.
  • the PDU 23 is one of the electrical components that receive power from the battery 22.
  • a drive shaft 24 is connected to the rotating shaft of the motor 20 via a worm gear and a spur gear (not shown). As the rotating shaft rotates under the action of the motor 20, the drive shaft 24 rotates, and as a result, the drive wheels 16 rotate.
  • the driven shaft 25 is rotatably supported on the main frame 14, and the driven wheel 18 is provided at the tip of the driven shaft 25. As the drive wheel 16 rotates, the driven wheel 18 and the driven shaft 25 rotate integrally.
  • a bucket 26 (loading part) is arranged on the front upper part of the main frame 14.
  • the front lower end 26fb of the bucket 26, which is the front end of the lower surface 26bo, is connected to the front end of the main frame 14 via the connecting pin 28.
  • a first insertion hole 29 is formed at the front end of the main frame 14, and a second insertion hole (not shown) is formed at the front lower end 26fb of the bucket 26. Then, the connecting pin 28 is inserted into the first insertion hole 29 and the second insertion hole that are overlapped with each other.
  • the bucket 26 is located above the driven wheel 18. More specifically, the rear lower end 26rb, which is the rear end of the lower surface 26bo of the bucket 26, is located between the driven wheel 18 and the driving wheel 16 in a side view. In other words, the rear lower end 26rb is located in the range A1 (first direction side) in front of the front end of the drive wheel 16. That is, the lower surface 26bo of the bucket 26 acts on the first direction side (front side) of the transport carriage 10.
  • the front end 26f of the bucket 26 is inclined from the second direction to the first direction from the front lower end 26fb to the front upper end 26fu.
  • the rear end 26r of the bucket 26 is inclined from the first direction to the second direction from the rear lower end 26rb to the rear upper end 26ru.
  • the bucket 26 may be at a position where the load of the bucket 26 substantially acts on a portion (driving wheel 18) on the first direction side of the transport carriage 10. For this purpose, it is sufficient to arrange the lower surface 26bo of the bucket 26 in the range A1.
  • a part of the rear end 26r of the bucket 26 (for example, the rear upper portion including the rear upper end 26ru) is located behind the front end of the drive wheel 16 in a side view, that is, in the range A2 described later. It may be located.
  • the substantially intermediate portion of the bucket 26 in the front-rear direction is held by the main frame 14 via a first lock mechanism (not shown).
  • first lock mechanism (not shown).
  • the bucket 26 can rotate so that the rear end 26r rises in the counterclockwise direction in FIG. 1 with the connecting pin 28 as a fulcrum.
  • the bucket 26 loads, for example, earth and sand, rocks, etc. as the load 30.
  • the transport carriage 10 can move forward or backward as the drive wheels 16 and the driven wheels 18 rotate while the loaded object 30 is held in the bucket 26.
  • the subframe 32 stands up from the rear part (second direction side) of the main frame 14. As shown in FIG. 2, the subframe 32 includes two front-rear direction bars 34 extending from the vicinity of the rear end 26r of the bucket 26 toward a second direction (rearward). The rear ends of these two front-rear direction bars 34 form a set of gripping portions 36 gripped by the operator W. In the vicinity of the grip portion 36, for example, a clutch lever 38, a release lever 39 for releasing the lock to the bucket 26 by the first lock mechanism, a throttle lever 40 for setting the forward speed of the transport carriage 10, and the like are provided. Be done. As can be understood from this, the front-rear direction bar 34 extending along the second direction is an operation portion provided with the grip portion 36.
  • the rear ends of the two front-rear direction bars 34 are open to each other, but a bridge bar extending in a direction substantially orthogonal to the front-rear direction is bridged between the rear ends. You may do it.
  • the grip portion 36 and the three levers 38, 39, 40 and the like can be provided on the bridge bar.
  • two battery cases 42 as removable battery storage parts are front and rear. It is supported so as to be parallel in the direction orthogonal to the direction. That is, the battery case 42 is arranged in parallel in front and behind in the direction orthogonal to the paper surface of FIG. 1, and a support bar 43 (see FIG. 2) is bridged between the two front-rear direction bars 34. The rear upper portion (upper end portion on the second direction side) of the battery case 42 is supported by the support bar 43.
  • the battery case 42 has a front lower end 42fb which is the lower end and the upper end on the first direction side, and a rear lower end 42rb where the front upper end 42fu is the lower end and the upper end on the second direction side. It is inclined so as to be located above (higher) than each of the upper ends 42ru. That is, the battery case 42 is inclined downward (lower) toward the rear end (end in the second direction) from the front end (end in the first direction), in other words, toward the ground G. ing. Therefore, the front lower end 42fb is located on the first direction side, and the rear upper end 42ru is located on the second direction side.
  • the battery case 42 is located above the traveling portion 12. More specifically, the lower surface 42bo of the battery case 42 (the range from the front lower end 42fb to the rear lower end 42rb) is arranged so as to be located in the range A2 above the front-rear width of the drive wheels 16 in a side view. To. Therefore, the load of the battery case 42 and the battery 22 acts on the portion of the transport carriage 10 on the second direction side (rear side, drive wheel 16).
  • the battery case 42 may be at a position where the load of the battery case 42 substantially acts on a portion (rear side, drive wheel 16) on the second direction side of the transport carriage 10.
  • the battery case 42 may be arranged so that the lower surface 42bo is within the range A2. In this arrangement, as illustrated in FIG. 1, the rear upper end 42ru of the battery case 42 may extend slightly toward the second direction (rear) side of the drive wheel 16 (range A2). Further, a part of the lower surface 42bo may overlap with the drive wheel 16 in a side view.
  • the battery case 42 for example, a case configured according to the battery case included in the battery storage device described in International Publication No. 2019/064593 and set to accommodate only one battery 22 is adopted. do it. That is, the main configuration of the battery case 42 is known, and therefore detailed description and illustration will be omitted.
  • the battery case 42 has a case main body 44 and a lid member 46 connected to the case main body 44 via a hinge (not shown).
  • the case body 44 has a substantially rectangular parallelepiped shape, and an accommodating portion 50 capable of accommodating the battery 22 is formed inside the case body 44.
  • the battery case 42 is in an open state in which the accommodating portion 50 is visually recognized by rotating the lid member 46 so as to stand up toward the front and upper sides.
  • the lid member 46 that rotates rearward and downward covers the case body 44, the accommodating portion 50 is hidden.
  • the lid member 46 is locked to the case body 44 by a second locking mechanism (not shown). In this case, the lid member 46 is maintained in the closed state unless the second lock mechanism is released.
  • the battery 22 has a substantially rectangular parallelepiped shape as shown in FIG. 1 of JP-A-2019-68720. Therefore, the accommodating portion 50 has a shape as if a square pillar was hollowed out. That is, the accommodating portion 50 is a space defined by one bottom wall 52 and four side walls.
  • One of the side walls is a lower side wall 54 facing downward, and a corner portion 55 is formed at the intersection of the lower side wall 54 and the bottom wall 52. Further, two of the side walls are lateral side walls 56 rising from the lower side wall 54, and the remaining one is an upper side wall 58 that is connected to the two lateral side walls 56 and faces the lower side wall 54.
  • An opening 60 for inserting or removing the battery 22 is formed in the upper portion of the accommodating portion 50. That is, the battery case 42 has an opening 60 that points upward.
  • the battery 22 is removable from the battery case 42 (insertable and removable from the accommodating portion 50). Of course, the battery 22 passes through the opening 60 when it is attached and detached.
  • the axis L of the accommodating portion 50 extends along the moving direction of the battery 22 when inserting or removing the battery 22 into the accommodating portion 50, that is, the attaching / detaching direction.
  • the axis L of the accommodating portion 50 is also tilted.
  • the axis L of the accommodating portion 50 is inclined upward (becomes higher) from the first direction to the second direction.
  • the inclination angle ⁇ of the axis L of the accommodating portion 50 with respect to the vertical direction is preferably 10 ° to 45 °. In this case, it becomes easy to push the battery 22 into and out of the accommodating portion 50.
  • the opening 60 is inclined so as to be substantially orthogonal to the axis L of the accommodating portion 50. That is, the opening 60 has the highest opening upper end 60up (highest portion) and the lowest opening lower end 60bo (lowest portion), and the opening upper end 60up is located on the first direction side and is open. The lower end 60bo is located on the second direction side. Therefore, the opening 60 points in the second direction.
  • the upper end 60up of the opening is substantially the same as the upper end 58up which is the end of the upper side wall 58 on the opening 60 side
  • the lower end 60bo of the opening is substantially the same as the upper end 54up which is the end of the lower side wall 54 on the opening 60 side.
  • the height H of the lower end 60bo of the opening 60 from the ground contact portion 12bo is based on, for example, the average height of an adult male living in a country or region where the transport trolley 10 is used, and when the battery 22 is inserted or removed. It is preferable to set it in a position where it is not necessary to bend it significantly.
  • the height H is preferably in the range of 80 cm to 120 cm, and more preferably in the range of 80 cm to 100 cm or less.
  • the opening 60 may be set above the grip portion 36 (front-rear direction bar 34).
  • the subframe 32 may be provided in the tilting means so that the tilt angle of the battery case 42 with respect to the ground G can be changed.
  • the height position H and the tilt angle ⁇ can be appropriately changed according to the physique of the worker W. Therefore, the versatility of the transport carriage 10 is increased. Even when the tilt angle of the subframe 32 is changed, the battery case 42 as a whole is located above the traveling portion 12.
  • the bottom wall 52 serves to block the battery 22 inserted in the accommodating portion 50 and prevent the battery 22 from entering further. That is, the bottom wall 52 is a battery positioning portion.
  • the bottom wall 52 is inclined so as to be substantially orthogonal to each of the side walls (lower side wall 54, two lateral side walls 56, upper side wall 58) and substantially parallel to the opening 60. Therefore, the bottom wall 52 has a bottom upper end 52up, which is the highest position, and a bottom lower end 52bo, which is the lowest position, and the bottom upper end 52up is on the first direction side and the bottom lower end 52bo is on the second direction side.
  • the bottom wall 52 has, for example, a device near the upper side wall 58, more specifically, on the bottom upper end 52up side of the midpoint of the perpendicular line orthogonal to each extending direction of the bottom upper end 52up and the bottom lower end 52bo.
  • a side connector 64 is provided.
  • the device-side connector 64 is electrically connected to the battery-side connector 66 provided at the bottom of the battery 22.
  • the electric power of the battery 22 is supplied to the motor 20 (electric drive source) and electrical components such as the PDU 23 via the battery-side connector 66 and the device-side connector 64.
  • the device-side connector 64 functions as a conduction connection portion. Since the configuration of the device-side connector 64 is described in detail in International Publication No. 2019/064593, detailed illustration and description thereof will be omitted here.
  • the lower side wall 54 which is one of the side walls, is inclined so as to be substantially parallel to the axis L of the accommodating portion 50. That is, the lower side wall 54 moves upward from the first direction to the second direction. Therefore, the lower end 54bo (bottom wall 52 side), which is the lowest position, is located on the first direction side. On the other hand, the upper end 54up (opening 60 side), which is the highest position, is located on the second direction side.
  • the weight of the battery 22 is applied to the lower side wall 54 as a load.
  • the lower side wall 54 is a battery support that receives the weight of the battery 22.
  • the lower end 54bo of the lower side wall 54 is at the same position as the bottom lower end 52bo.
  • the lower side wall 54 has a slight thickness, and the upper end thereof is cut out so as to be substantially horizontal. This notch serves as a guide wall 68 for temporarily stopping the battery 22 and changing its posture.
  • the hinge connects the front upper end 44f of the case body 44 configured as described above and the front lower end 46f of the lid member 46. Therefore, the lid member 46 can rotate so that the rear end 46r rises toward the front and upper sides as described above.
  • the transport carriage 10 (working vehicle) according to the present embodiment is basically configured as described above, and the effects thereof will be described next.
  • the load 30 When the load 30 is transported by the transport trolley 10, the load 30 is first loaded in the bucket 26.
  • the rear end 26r of the bucket 26 is inclined so that the upper end 26ru is then directed toward the second direction. That is, the tilting direction of the rear end 26r of the bucket 26 is substantially the same as the tilting direction of the battery case 42. Therefore, the capacity of the bucket 26 can be increased while preventing the bucket 26 from interfering with the battery case 42. That is, the load capacity of the transport carriage 10 becomes large.
  • the lower surface 42bo of the battery case 42 is prevented from extending in the second direction from the second direction side end (rear end) of the drive wheel 16. Therefore, the size of the transport carriage 10 can be reduced.
  • the transport carriage 10 is started in a state where the battery 22 is accommodated in each accommodating portion 50 of the two battery cases 42 and the lid member 46 closes the accommodating portion 50.
  • the battery-side connector 66 is electrically connected to the device-side connector 64. Therefore, the electric power from the battery 22 is supplied to various electrical components such as the motor 20 which is the electric power drive source and the PDU 23.
  • the throttle lever 40 is set to a position other than the parking position, and the clutch lever 38 is gripped to connect the rotary shaft of the motor 20 to the rotary shaft via a worm gear and a spur gear.
  • the driven drive shaft 24 rotates.
  • the drive wheels 16 rotate counterclockwise in FIG. 1, and the transport carriage 10 moves forward in the first direction (forward).
  • the loaded object 30 is earth and sand, gravel, or the like
  • a large load acts on the front of the transport carriage 10 (first direction, driven wheel 18).
  • the transport trolley 10 is small and relatively lightweight, if the weight of the load 30 is excessively large, the center of gravity is biased toward the front side (first direction side) of the transport trolley 10. As a result, there is a concern that the posture of the transport carriage 10 becomes unstable.
  • the two battery cases 42 are arranged in the second direction opposite to the first direction in the transport carriage 10, and the batteries 22 are arranged in the two battery cases 42.
  • the weights of the battery case 42 and the battery 22 are applied to the rear portion (driving wheel 16) of the transport carriage 10 as a load. Therefore, the weights of the bucket 26 loaded with the loaded object 30, that is, the front portion of the transport trolley 10, and the rear portion of the transport trolley 10 provided with the battery case 42 are substantially balanced.
  • the bucket 26 when unloading, the bucket 26 is released from the restraint by the first lock mechanism, and the rear end 26r of the bucket 26 rotates so as to rise in the counterclockwise direction in FIG. 1 with the connecting pin 28 as a fulcrum. At this time, for the above-mentioned reason, it is possible to prevent the rear portion of the transport trolley 10 from being lifted from the ground G more than necessary, and the posture of the transport trolley 10 becomes unstable due to this.
  • the battery case 42 and the battery 22 are inclined with respect to the vertical direction so that the upper portion of the accommodating portion 50 in which the opening 60 is formed extends in the second direction.
  • the center of gravity of the battery case 42 and the battery 22 is further moved from the bucket 26 to the second direction side as compared with the state where the lower surface 42bo of the battery case 42 is placed so as to be horizontal (not tilted).
  • Easy to separate. This also contributes to balancing the weight of the front side of the transport trolley 10 (the bucket 26 loaded with the load 30) and the rear side of the transport trolley 10 (battery case 42 and battery 22). That is, the unstable posture of the transport carriage 10 is further suppressed.
  • the tilting direction of the battery case 42 may be reversed from that in FIG. That is, the opening 60 is oriented upward, the upper portion in which the opening 60 is formed extends in the first direction, and the lower portion including the lower surface 42bo of the battery case 42 extends in the second direction.
  • the axis L of the portion 50 can also be inclined with respect to the vertical direction.
  • the battery case 42 is tilted downward from the first direction to the second direction.
  • the center of gravity of the battery case 42 and the battery 22 is on the second direction side from the bucket 26 as compared with the state where the lower surface 42bo of the battery case 42 is placed so as to be horizontal (the state where the battery case 42 is not tilted). It can be made easier to separate.
  • the transport trolley 10 will be used in rainy weather.
  • the case body 44 and the lid member 46 are sealed with a sealing member, if the sealing member deteriorates over time, there is a concern that rainwater or the like may enter the battery case 42.
  • the lower side wall 54 of the accommodating portion 50 is inclined so as to be directed in the first direction from the upper end 54up toward the lower end 54bo, and the bottom wall 52 is the lower end (lowest) bottom lower end 52bo. Then, it is inclined so as to be directed in the first direction toward the upper end (highest) of the bottom upper end 52up. Therefore, rainwater or the like is temporarily stored in the corner portion 55 formed by the lower side wall 54 and the bottom wall 52.
  • the device-side connector 64 and the battery-side connector 66 are located on the bottom upper end 52up side of the bottom wall 52 with respect to the midpoint of the perpendicular line orthogonal to each extending direction of the bottom upper end 52up and the bottom lower end 52bo. There is.
  • both connectors 64 and 66 are close to the highest side on the bottom wall 52. Therefore, it is possible to prevent both connectors 64 and 66 from being immersed in water. The same applies when dew condensation occurs in the battery case 42.
  • the accommodating portion 50 By inclining the accommodating portion 50 in this way, there is also an advantage that the device-side connector 64 and the battery-side connector 66 can be protected from rainwater, dew condensation, and the like.
  • the worker W may stop the transport trolley 10 by releasing the clutch lever 38. If necessary, the operator W grasps the release lever 39 and releases the lock to the bucket 26 by the first lock mechanism. In this state, the operator W may rotate the transport carriage 10 so that the rear end of the front-rear direction bar 34 rises forward while gripping the grip portion 36. That is, the rear portion of the transport trolley 10 is lifted from the ground G. At this time, the bucket 26 rotates around the connecting pin 28 as a fulcrum. When the loaded object 30 is earth and sand or the like, this facilitates the unloading of the loaded object 30 from the bucket 26.
  • the battery 22 may be taken out from the battery case 42 prior to this rotation.
  • the weight of the transport carriage 10 on the second direction side becomes smaller. Therefore, since the worker W can easily lift the rear portion of the transport trolley 10 from the ground G, the load 30 can be easily unloaded from the bucket 26.
  • the operator W may hold the clutch lever 38 after setting the throttle lever 40 in the retracted position. Similarly to the above, when the clutch lever 38 is released, the transport carriage 10 is stopped.
  • the transport carriage 10 When the transport carriage 10 is repeatedly driven as described above, the capacity of the battery 22 decreases. In this case, the worker W replaces the battery 22.
  • the transport trolley 10 may be driven to the charging station, or the battery 22 may be transported to the transport trolley 10.
  • the worker W first releases the lock (locking of the lid member 46) by the second lock mechanism, and then rotates the lid member 46 to open the battery case 42. Along with this, the opening 60 of the accommodating portion 50 and the upper end portion of the battery 22 are visually recognized. Next, the operator W grips the grip portion 22h provided at the upper end portion of the battery 22, and pulls up the battery 22 along the axis L of the accommodating portion 50.
  • the height range h of the opening 60 of the accommodating portion 50 from the lower end 60bo of the opening to the upper end 60up of the opening is located above the grip portion 36 (front-rear direction bar 34).
  • the height position of the opening 60 is set so that the worker W can grip the battery 22 without bending over.
  • the axis L of the accommodating portion 50 is inclined so that the inclination angle ⁇ with respect to the vertical direction is 10 ° to 45 °, the opening 60 faces the operator W substantially.
  • the lower side wall 54 defining the accommodating portion 50 receives the weight of the battery 22. Combined with the above, the worker W can easily pull up the battery 22.
  • the height H of the lower end 60bo of the opening 60 from the grounding portion 12bo of the traveling portion 12 is at a low position, it is not necessary for the operator W to lift the battery 22 to a high position. Therefore, the burden on the worker W is reduced.
  • the height H is preferably set to 80 cm or more and 120 cm or less, and more preferably 80 cm or more and 100 cm or less, the burden can be greatly reduced.
  • the opening 60 is oriented in the second direction, it is possible to prevent the battery 22 drawn from the accommodating portion 50 from interfering with the bucket 26 or the like.
  • the worker W lifts the charged battery 22 and brings it close to the opening 60. Since the lid member 46 rotates toward the front and upper side, it is possible to prevent the lid member 46 from interfering with the battery 22. Further, similarly to the above, since it is not necessary for the worker W to lift the battery 22 to a high position, the burden on the worker W is reduced.
  • the axis M of the battery 22 may be in a lying position extending along the horizontal direction.
  • a guide wall 68 is provided in the opening 60 of the accommodating portion 50.
  • the worker W can hook the lower end of the side surface 22s of the battery 22 in the lying position facing the guide wall 68 to the guide wall 68.
  • the worker W rotates the battery 22 so as to stand up slightly with the guide wall 68 as a fulcrum, and changes the battery 22 from the lying posture to the tilted posture as shown in FIG.
  • the axis L of the accommodating portion 50 and the axis M of the battery 22 become parallel. That is, the axis M of the battery 22 extends along the attachment / detachment direction.
  • the battery 22 As the battery 22 is tilted, its bottom slides on the guide wall 68, and the side surface 22s of the tilted battery 22 comes into contact with the lower side wall 54 of the accommodating portion 50. After that, the battery 22 easily advances to the bottom wall 52 side by its own weight while being supported by the lower side wall 54.
  • the battery case 42 and the accommodating portion 50 By inclining the battery case 42 and the accommodating portion 50 in this way, the work of inserting the battery 22 into the accommodating portion 50 can be performed as compared with the case where the accommodating portion 50 extends along the vertical direction or the horizontal direction. It will be easy.
  • the battery case 42 is arranged in a space formed by the rear end 26r (rear surface) of the bucket 26 and the subframe 32 (between the two front-rear direction bars 34).
  • the battery case 42 is arranged in a space formed by the rear end 26r (rear surface) of the bucket 26 and the subframe 32 (between the two front-rear direction bars 34).
  • the present invention is not particularly limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
  • the traveling unit 12 may be a crawler.
  • the work vehicle is not limited to the transport carriage 10, and may be a vehicle provided with a seat on which the worker W rides, for example, a dump truck, a crawler dump truck, or a rear car.
  • the removable battery storage portion may be configured by a frame member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Handcart (AREA)
  • Battery Mounting, Suspending (AREA)
PCT/JP2020/040853 2020-10-30 2020-10-30 作業車 Ceased WO2022091353A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2020/040853 WO2022091353A1 (ja) 2020-10-30 2020-10-30 作業車
DE112020007746.2T DE112020007746T5 (de) 2020-10-30 2020-10-30 Arbeitsfahrzeug
US18/250,627 US12151732B2 (en) 2020-10-30 2020-10-30 Work vehicle
JP2022558760A JP7434596B2 (ja) 2020-10-30 2020-10-30 作業車

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/040853 WO2022091353A1 (ja) 2020-10-30 2020-10-30 作業車

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WO2022091353A1 true WO2022091353A1 (ja) 2022-05-05

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JP (1) JP7434596B2 (https=)
DE (1) DE112020007746T5 (https=)
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DE112020007746T5 (de) * 2020-10-30 2023-08-10 Honda Motor Co., Ltd. Arbeitsfahrzeug
USD1074111S1 (en) * 2024-10-17 2025-05-06 Lin Ye Camping trolley

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US12151732B2 (en) 2024-11-26
JPWO2022091353A1 (https=) 2022-05-05
US20230399041A1 (en) 2023-12-14
JP7434596B2 (ja) 2024-02-20

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