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11. 发明专利

JPH0956015A ELECTRIC TRUCK 失效
公开(公告)号：JPH0956015A
公开(公告)日：1997-02-25
申请号：JP20563995
申请日：1995-08-11
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： ITO TOSHIKATSU , NINOMIYA TAKAYUKI , ISHIZAKI KAZUHISA , UJIIE TAKUJI
IPC分类号： B62B3/00 , B60L15/20
摘要： PROBLEM TO BE SOLVED: To obtain an electric truck in which the operability is enhanced using a single drive motor. SOLUTION: Under the loading space 10 of an electric truck, two front wheels 50, 52 are secured fixedly to the front side of loading space in the advancing direction and two rear wheels 54, 56 are secured swingingly to the rear side of loading space in the advancing direction. One front wheel 50 is fixed with a DC motor 62 through a gear box 64 and a handle 20 is fixed to the rear off loading space. A battery case containing a battery 34 and a controller 200 is suspended from the handle 20. The controller 200 is provided with a soft start circuit for preventing abrupt increase of the speed when a power switch 40 is turned on.

12. 发明专利

JPH092275A MOTOR-DRIVEN DOLLY WITH LIFTING FUNCTION 失效
公开(公告)号：JPH092275A
公开(公告)日：1997-01-07
申请号：JP15738595
申请日：1995-06-23
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： ISHIZAKI KAZUHISA , ITO TOSHIKATSU , NINOMIYA TAKAYUKI , UJIIE TAKUJI
IPC分类号： B60K1/00 , B60P1/02 , B62B3/06
摘要： PURPOSE: To positively prevent descent of a load carrier at the time of an elevating power part being damage so as to improve safety by disposing a shaft, provided with spiral grooves inclined in the opposite directions from the axial center, near the center of the load carrier, and rotating the shaft by external power to elevate the load carrier through bendable arms. CONSTITUTION: When an elevating motor 10 is driven, power is transmitted to an elevating shaft 9 so as to be rotated. The elevating shaft 9 has spiral grooves formed in the state of being inclined in the opposite directions symmetrically from the center of the shaft 9, and sliders 11 are screwed with the respective grooves, so that the sliders 11 are moved in the laterally symmetric state by the rotation of the elevating shaft 9. This power in the thrust direction is transmitted to upper and lower arms 8a, 8b connected in a bendable state, and the power in the thrust direction is converted into radial power by these arms to elevate a load carrier 2. A complicated hydraulic jack and a hydraulic pump can thereby be dispensed with, and safety at the time of failure can be ensured.

13. 发明专利

JPH10215549A MOTOR 失效
公开(公告)号：JPH10215549A
公开(公告)日：1998-08-11
申请号：JP1501897
申请日：1997-01-29
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： UJIIE TAKUJI , ITO TOSHIKATSU , NINOMIYA TAKAYUKI , ISHIZAKI KAZUHISA
IPC分类号： H02K13/00
摘要： PROBLEM TO BE SOLVED: To assemble a motor through stacking of components in one direction by supporting a cup member at the inner circumferential surface thereof, while covering a bearing and supporting the outer circumferential surface thereof while fitting to the inner side face of a bracket. SOLUTION: A magnetic circuit is provided on the inner circumference of a tubular yoke 4, a field coil 2 is formed around the main pole thereof and an armature 6 is arranged on the inner circumference of the field coil 2. A brush 3 for supplying a current to the armature 6 is held by a brush holder 11, comprising a flanged cup member which is applied to a bearing 13 to be supported on the inner circumferential surface thereof with the outer circumferential surface thereof which is fitted to the inner side face of a bracket 10 and supported in place. Since a motor can be assembled by stacking the components from one direction, workability can be enhanced.

14. 发明专利

JPH09202236A SMALL ELECTRIC TRUCK 失效
公开(公告)号：JPH09202236A
公开(公告)日：1997-08-05
申请号：JP1360796
申请日：1996-01-30
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： ISHIZAKI KAZUHISA , ITO TOSHIKATSU , NINOMIYA TAKAYUKI , UJIIE TAKUJI
IPC分类号： B60B33/00 , B62B3/00 , B62B5/00
摘要： PROBLEM TO BE SOLVED: To obtain a constant braking force irrespective of the abrasion of a wheel or other external force. SOLUTION: The small electric truck is composed of a drive wheel 4 of the truck, a fixed wheel 5 supporting the truck, free wheels 6 changing the direction, a stopper 7 set when stopping, a cylinder separating the wheel from road surface, a pedal expanding and contracting the cylinder, an assist arm connected to the tip part of the pedal, and a mount attached to the cylinder, and a constant braking force can be obtained irrespective of the abrasion of the wheel or other external force by disengaging the grounding power between the wheel and the road surface of the stopper by the elevation of the cylinder in the stopper 7 disposed in the driving wheel side or in the front or back of the truck 1.

15. 发明专利

JPH08310402A SMALL MOTOR-DRIVEN CARRIER 失效
公开(公告)号：JPH08310402A
公开(公告)日：1996-11-26
申请号：JP12212395
申请日：1995-05-22
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： ITO TOSHIKATSU , NINOMIYA TAKAYUKI , ISHIZAKI KAZUHISA , UJIIE TAKUJI
IPC分类号： B62B3/00
摘要： PURPOSE: To prevent the front part of a load-carrying platform from floating at the time of no-load starting, in a walking-type small motor-driven carrier provided with the load-carrying platform for loading an object to be carried, by fitting an adjusting function for moving the installation position of a battery case forward and backward according to the weight of an object to be loaded. CONSTITUTION: This small motor-driven carrier is provided with a pair of right and left caster type front wheels and rear wheels serving as driving wheels, mounted on the bottom of a load-carrying platform, and a handle 4 mounted on one end part of the top of the load-carrying platform. On the upper part of the handle 4, a battery case 5 which builds a controller and a battery in it is disposed. On the upper part of the battery case 5, a speed controller and a forward/backward change-over switch is provided. The battery case 5 is constructed so as to be oscillatingly-supported against a horizontal bar of the handle 4 and to fix its lower part at a prescribed oscillating position by bolting through a traveling bracket 5g provided with an arc-shaped guide groove.

16. 发明专利

JPH08295242A SMALL TRANSPORT VEHICLE 失效
公开(公告)号：JPH08295242A
公开(公告)日：1996-11-12
申请号：JP9922295
申请日：1995-04-25
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： UJIIE TAKUJI , ITO TOSHIKATSU , ITO TOSHIO
IPC分类号： B62B3/02 , B62B5/00
摘要： PURPOSE: To alter a loading space in one stage or two stages easily by hand according to application purposes, and to make it usable as formed into two stages in the case of a load as being unsuperposed and more loaded. CONSTITUTION: In order to form two loading spaces 2 and 3 of a small transport vehicles into two stages in structure, four supporting bars 4 are used, and four supporting bar storage spaces 6 to house these supporting bars 4 are installed in these loading spaces 2 and 3. Each projection is attached to these bars 4, and in the inner part of these storage spaces 6 is provided with each projection in movable grooves and each recess part to lock both ends of the each supporting bar 4 whenever the loading space is made into two stages.

17. 发明专利

JPH09238404A ELECTRIC TRAVELING UNIT OF PUSH TRUCK 失效
公开(公告)号：JPH09238404A
公开(公告)日：1997-09-09
申请号：JP4445396
申请日：1996-03-01
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： UJIIE TAKUJI , ITO TOSHIKATSU , NINOMIYA TAKAYUKI , ISHIZAKI KAZUHISA
IPC分类号： B60L11/18
摘要： PROBLEM TO BE SOLVED: To realize a push truck traveling in the electric-driven mode by connecting a drive unit to a battery box in which a controller and a battery are stored, and fitting the drive unit and the battery box to a loading platform of the push truck by a fitting piece provided on a battery unit. SOLUTION: In an electric-driven truck provided with a battery box 3 comprising a drive unit which comprises drive wheels 5-3, a motor 5-1, and a reduction gear 5-2, a controller 4 to control the number of revolution of the motor 5-1, and a battery 7 to drive the motor 5-1, the drive unit 5 is integratedly connected to the battery box 3, and a U-shaped piece 6 to hold a loading platform 9 of the truck from upper and lower parts is provided on the battery box 3. The drive unit 5 and the battery box 3 are fitted to the loading platform 9 of the push truck by the U-shaped piece 6. The push truck can be electrically traveled.

18. 发明专利

JPH0970103A CONTROLLER FOR MOTOR-DRIVEN CARRIER 失效
公开(公告)号：JPH0970103A
公开(公告)日：1997-03-11
申请号：JP22141295
申请日：1995-08-30
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： NINOMIYA TAKAYUKI , ITO TOSHIKATSU , ISHIZAKI KAZUHISA , UJIIE TAKUJI
IPC分类号： B60L11/18 , B60L3/00
摘要： PROBLEM TO BE SOLVED: To start a motor-driven carrier even when the capacity of the main battery which supplies power for driving the motor for driving the carrier drops by switching the power source to an auxiliary battery. SOLUTION: A power source circuit 16 and main control circuit 17 are operated by turning on an operation switch 2 and a voltage signal is outputted to the control circuit 17 by changing a speed setting volume 1. When a motor is started, the X section of the control circuit 17 detects the terminal voltage of a main battery 4 and, when the detected voltage reaches the voltage corresponding to that which is reached when the 50% of the rated capacity of the battery 4 is discharged, switches the contact of a relay 15 from a contact 15a for the battery 4 to a contact 15b for a standby battery 4a. In order to indicate the operating states of the batteries 4 and 4a, LEDs 20 and 21 are respectively connected to the contacts 15a and 15b so that the operating states of the batteries 4 and 4a can be monitored. In such a way, the power source to the motor 4 is switched to the standby battery 4a before the main battery 4 runs down when the capacity of the battery 4 drops.

19. 发明专利

JPH092139A CONTROL DEVICE FOR MOTOR-DRIVEN CARRIER 失效
公开(公告)号：JPH092139A
公开(公告)日：1997-01-07
申请号：JP15435395
申请日：1995-06-21
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： NINOMIYA TAKAYUKI , ISHIZAKI KAZUHISA , ITO TOSHIKATSU , UJIIE TAKUJI
IPC分类号： B60K1/00 , B60P5/00 , B62B3/00
摘要： PURPOSE: To prevent the occurrence of an excess of a loading weight or the like and to ensure safety traveling by reading signals from an object detecting sensor and a piezoelectric sensor and stopping a carrier. CONSTITUTION: It is detected by an object detecting sensor 10 that the height of cargoes loaded on a load-carrying platform is equal to, or exceeds a given value. When the above-mentioned condition is detected, 5V is outputted from an object detecting sensor processing circuit 12 to an OR circuit 14, and when the above-mentioned condition is not detected, OV is outputted. Simultaneously, the weight of cargoes loaded on a load-carrying platform is detected by a piezoelectric sensor 11 arranged on the under surface of the load-carrying platform. 5V is outputted to an OR circuit 14 to detect a rated weight or more and when weight is below the rated weight, OV is outputted. The OR circuit 14 outputs 5V to a main control circuit 15 when 5V is outputted from either the object detecting sensor processing circuit 12 or a piezoelectric sensor processing circuit 13, but does not effect a duty output to the gate side of an FET16 and stops a motor 9. In this way, when either of them is detected, the motor 9 is stopped to ensure safety.

20. 发明专利

JPH092081A SMALL-SIZED ELECTRIC CARRIER 失效
公开(公告)号：JPH092081A
公开(公告)日：1997-01-07
申请号：JP15435595
申请日：1995-06-21
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： UJIIE TAKUJI , ITO TOSHIKATSU , NINOMIYA TAKAYUKI , ISHIZAKI KAZUHISA
IPC分类号： B60K1/04 , B62B3/00
摘要： PURPOSE: To prevent gas explosion in an electric carrier having a battery and a controller stored in a common case by providing a partition for isolating the battery from the controller, and discharging explosive gas generated from the battery at the time of charging the battery to the outside through an air vent hole. CONSTITUTION: A small-sized electric carrier is so constructed that when a power supply switch 11 is turned on, electric power is supplied from a battery 8 to a travelling motor through a controller 9 to rotate a driving wheel. In the above carrier, at the time of charging the battery 8, the power supply switch 11 is turned off, and a connector of a charger is connected to a charging connector 12 to charge the battery. At this time, though explosive gaseous hydrogen is generated from the battery 8, the gaseous hydrogen rises in a battery box 7 to be transmitted to a partition 14 between the battery 8 and the controller 9 and discharged from an air vent hole 13 formed on the side surface. That is, gaseous hydrogen can be prevented from flowing into a contact or the like of the controller 9 and the power supply switch 11 by the partition 14 so as to heighten the safety.

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