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1. 发明专利

JPH1042616A MOTOR-DRIVEN CARRYING CART FOR FARM FIELD 失效
公开(公告)号：JPH1042616A
公开(公告)日：1998-02-17
申请号：JP20219996
申请日：1996-07-31
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD , NISHIZAWA KK
发明人： ISHIZAKI KAZUHISA , TAKAO HIROMI , NINOMIYA TAKAYUKI , UJIIE TAKUJI , NISHIZAWA AKIRA
IPC分类号： A01B51/02 , B62B3/00
摘要： PROBLEM TO BE SOLVED: To provide a motor-driven carrying cart for the use in a farm field, having decreased running resistance and enabling efficient transportation by optimizing the width between wheels. SOLUTION: This motor-driven carrying cart is provided with a carrying bed for holding harvested crops, wheels for supporting the carrying bed 1 in movable state, a motor generating rotary power and a power-transmission mechanism transmitting the power from the motor to the rear wheels 3b. The wheels are composed of rear wheels 3b receiving the rotary force from the motor to drive the carrying bed 1 and idling front wheels 3a. These wheels 3a, 3b are rotatably supported by U-shaped supporting leg parts 5. The width (l) of each wheel 3a, 3b is set to satisfy the formula 0.02×L

2. 发明专利

JP2001069716A DEVICE FOR CONTROLLING MOVEMENT OF DYNAMO-ELECTRIC MACHINE ROTOR IN AXIAL DIRECTION 失效
公开(公告)号：JP2001069716A
公开(公告)日：2001-03-16
申请号：JP24475899
申请日：1999-08-31
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： SAITO SHIGEKI , UJIIE TAKUJI
IPC分类号： H02K5/173 , F16C35/077
摘要： PROBLEM TO BE SOLVED: To improve the assembly workability by employing a structure that enables the movement of a rotor in its axial direction to be easily controlled from outside by using screws. SOLUTION: In a dynamo-electric machine in which housings 2, 3 are provided at both sides of a stator core and a rotor 6 is rotatably supported via ball bearings 7, 8, a headless screw 11 is provided in the outer race of the ball bearing 7 so that the movement of the rotor 6 in the axial direction can be controlled. Here, the headless screw 11 is tightened lightly and unfastened moderately to prevent the excessive thrust load from being applied. After setting, the rotation is locked by screw lock and the like. As a result, the movement of the rotor 6 in the axial direction can easily be controlled after the dynamo-electric machine is assembled.

3. 发明专利

JPH09109894A ELECTRIC CARRIER 失效
公开(公告)号：JPH09109894A
公开(公告)日：1997-04-28
申请号：JP26691695
申请日：1995-10-16
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： B60K1/00 , B60K7/00 , B60L15/20 , B62B3/00
摘要： PROBLEM TO BE SOLVED: To provide an electric carrier in which the operability and the power consumption ratio are improved In the electric carrier using two drive motors. SOLUTION: Two directionally fixed front wheels 50, 52 which are fitted to a front side in the advancing direction of a platform, and two directionally free rear wheels 54, 56 which are fitted to a rear side in the advancing direction of the platform are fitted below a platform 10 on which an article to be carried is loaded. A DC motor 62N is fitted to one of the front wheel 50 of two front wheels through a gear box 64N, and a DC motor 62H is fitted to the other front wheel 52 through a one-way clutch and a gear box 64H. A battery case 30 storing a battery 34 and a controller 200 is suspended from a handle 20. An upper face of the battery case 30 is commonly used as a control panel, and a normal/hard switch to switch and control the DC motors 62N, 62H is fitted.

4. 发明专利

JPH0958381A ELECTRIC TRANSPORTATION VEHICLE WITH COLLISION STOP FUNCTION 失效
公开(公告)号：JPH0958381A
公开(公告)日：1997-03-04
申请号：JP22141195
申请日：1995-08-30
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： B60R19/48
摘要： PROBLEM TO BE SOLVED: To simplify structure of an electric transportation vehicle with collision stop function and make it possible to stop the vehicle even when a side section of the vehicle comes into contact with an obstacle by providing a pressure-displacement conversion section which receives changes of pressure from a pressure detection member when the vehicle comes into contact with the obstacle and converts it into displacement and stopping the electric transportation vehicle by an electric change-over member which is operated based on the displacement. SOLUTION: When a front end section of a load carrying platform of an electric transportation vehicle with collision stop function collides against or comes into contact with an obstacle, a beltlike moving body switch 7 is operated in such a manner that air or liquid in a contact section 14 flows into a contact cover 16 in which a contact switch 13 is stored through a tube 15. Since air or liquid presses a diaphragm 17 to which the contact switch 13 is connected, a contact of the contact switch 13 comes into contact to send a shut-off signal to a controller 8. When the controller 8 detects this shut-off signal, it sends a signal to a shut-off relay 10 between a motor 2 and a battery 9 which are built in, the shut-off relay 10 opens a circuit between the motor 2 and the battery 9 to shut off the supply of power, and the motor 2 stops.

5. 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.

6. 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.

7. 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.

8. 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.

9. 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.

10. 发明专利

JP2003092850A ELECTROLYTIC CORROSION-PROOF MOTOR 审中-公开
公开(公告)号：JP2003092850A
公开(公告)日：2003-03-28
申请号：JP2001285572
申请日：2001-09-19
申请人： HITACHI CAR ENG CO LTD
发明人： SAITO SHIGEKI , WADA HISASHI , UJIIE TAKUJI , HOSHI KIICHI , ISHII KANICHI
IPC分类号： H02K5/16
摘要： PROBLEM TO BE SOLVED: To provide an electrolytic corrosion-proof motor in which, even if a center hole is formed at a center of a rotary shaft, a contact plane is provided at the center of the rotary shaft to reduce wear, keep a stable contact state, and keep a contact resistance at a low value. SOLUTION: This motor has a rotary shaft made of conductive material and roller bearings supporting the rotary shaft rotatably. The roller bearings are provided in one or both of a conductive bracket at the load side and an opposite side thereof to support a rotor. A conductive metal plate is provided on at least one end of the rotary shaft, and a conical spring is provided on the bracket. The tip of the conical spring is brought into contact with the conductive metal plate at a position close to the center of rotation of the rotor to obtain electrical continuity.

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