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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

JPH10141301A OIL HYDRAULIC POWER UNIT 失效
公开(公告)号：JPH10141301A
公开(公告)日：1998-05-26
申请号：JP29278996
申请日：1996-11-05
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： AZUMA YASUO , TAKAO HIROMI
IPC分类号： F15B1/00
摘要： PROBLEM TO BE SOLVED: To downsize the oil hydraulic power unit by shortening the axial length without incurring cost increase. SOLUTION: This unit, which includes an electric motor 5, a hydraulic pump 6 driven by the electric motor 5, a directional control valve 9 for controlling the path of the pressure oil delivered from the hydraulic pump 6, and an oil tank 20, is composed to be driven by feeding oil pressure delivered from the hydrualic pump 6 to the hydrualic actuator of a hydrualic equipment. In this case, a small diameter bottomed container 101b is arranged inside a large diameter bottomed container 101a and an oil tank is formed in the space between the large diameter bottomed container 101a and the small diameter bottomed container 101b, while the electric motor 5 is arranged inside the small diameter bottomed container 101b.

3. 发明专利

JPH109201A GENERAL-PURPOSE TYPE HYDRAULIC POWER UNIT 失效
公开(公告)号：JPH109201A
公开(公告)日：1998-01-13
申请号：JP16141696
申请日：1996-06-21
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： AZUMA YASUO , TAKAO HIROMI
IPC分类号： F04B53/10 , F04B23/00 , F04B23/02 , F15B1/00
摘要： PROBLEM TO BE SOLVED: To ensure the mounting performance and simplify combination of parts to shorten the shaft length by forming the center part of an oil tank into a recessed part of double structure and inserting an electric motor inside the recessed part. SOLUTION: Oil tanks 1a, 1b are fastened by bolts 12 and nuts 13 together with a mounting plate 10 with a packing 11 put between the tanks. An O-ring 14 is inserted between the mounting plate 10 and the spigot part of the oil tank 1b to ensure the waterproofing property against the inside of the oil tank 1b. A change-over valve 9 and an electric motor 5 are loaded on the mounting plate 10 on opposite sides of the mounting plate, and a hydraulic pump 6 is loaded on the opposite side of the electric motor. By this structure, only the hydraulic pump is positioned on the position where the electric motor was conventionally located hitherto, and thus the whole length of 5 shaft can be shortened. Further, the need for the waterproofing performance for the electric motor 5 can be eliminated to reduce costs. Parts can be loaded in the same mounting method as conventional, and a wide selection of parts to be combined depending on the purpose, can be obtained.

4. 发明专利

JPH045120A AIR CONDITIONER FOR USE IN AUTOMOBILE 失效
公开(公告)号：JPH045120A
公开(公告)日：1992-01-09
申请号：JP10296690
申请日：1990-04-20
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： ENDO YOSHIHIDE , TAKAO HIROMI , MIYAMOTO SEIGO
IPC分类号： B60H1/32
摘要： PURPOSE:To protect the compressor without impairing the cooling performance by causing the compressor operation to be stopped for a prescribed period of time at the time when a pressure sensor has sensed extreme lowering in level of the compressor suction pressure at a low level of cooling and re-operating the compressor after passage of the prescribed period of time. CONSTITUTION:During the engine revolution, when an electromagnetic clutch 8 is excited, a compressor operates with the result that the refrigerant is caused to flow from a condenser 2 into an evaporator 6 through suction and compression thereof. As a result, cooled air is sent into the vehicle compartment by means of a fan 5. During this operation, the suction pressure in the compressor 1 is sensed by a protector 9. And if a condition in which this suction pressure is below a prescribed level continues for a prescribed period of time, the electromagnetic clutch 8 is stopped from excitation to stop the operation of the compressor 1. When another prescribed period of time has lapsed, the electromagnetic clutch 8 is re-excited through performance of a timer function of the protector 9, thereby operating the compressor 1 again. The protector 9 is composed of a pressure sensor 12 and a timer 13, the pressure sensor 12 being connected, via a capillary tube 11, to a low pressure piping 10 for connecting the evaporator 6 and a suction port of the compressor 1.

5. 发明专利

JPH02291483A SWASH PLATE COMPRESSOR 失效
公开(公告)号：JPH02291483A
公开(公告)日：1990-12-03
申请号：JP11181689
申请日：1989-04-28
申请人： HITACHI LTD
发明人： YAMAGUCHI KAZUHIKO , TAKAO HIROMI , TOYOSHIMA YASUHARU
IPC分类号： F04B27/08
摘要： PURPOSE:To improve reliability and durability of a bearing part by protruding one end of a shaft to the outside of a cylinder block, etc., and by arranging a cantilever thrust bearing means that supports a thrust load working on the shaft, on the protruded end. CONSTITUTION:In each center hole 2, 3 formed on the right and left cylinder blocks 4, 5, a shaft 1 is inserted, as well as radial bearings 6, 7 by which the shaft 1 is pivotally supported, are installed. On both sides of a swash plate 9 pressed fit in the center part 8 of the shaft 1, pistons 10, 11 in reciprocating motion are arranged. On both sides of each cylinder block 4, 5, valve plates 12, 13 and end plates 14, 15 are arranged, respectively. In this structure, one end of the shaft 1 is protruded to the outside of the cylinder block 11 and of the valve plate 13. A cantilever thrust bearing mechanism 24 is arranged on the protruded end.

6. 发明专利

JPH05180590A CONDENSER 失效
公开(公告)号：JPH05180590A
公开(公告)日：1993-07-23
申请号：JP34469291
申请日：1991-12-26
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： FUJINUMA YOSHIYUKI , TAKAO HIROMI , MIYAMOTO SEIGO , ENDO YOSHIHIDE
IPC分类号： F28F9/00 , B60H1/32
摘要： PURPOSE:To prevent clogging of a condenser even in the case of the condenser for an air conditioner to be used under severe conditions like a construction site, to provide easiness of maintenance and to prevent damage of a heat radiating fin in the case of an operation. CONSTITUTION:A condenser 1 is of a parallel type in which many refrigerant passages 2 are disposed in parallel and flat heat radiating fins 3 without cutting and erecting are provided between the passages 2. Frames 4 are provided at both right and left sides of the condenser 1, and dustproof filters 5, 6 are detachably mounted at front and rear surfaces of the condenser 1 through the frames 4.

7. 发明专利

JPH02275267A ACCUMULATOR AND SETTING METHOD THEREOF 失效
公开(公告)号：JPH02275267A
公开(公告)日：1990-11-09
申请号：JP9513389
申请日：1989-04-17
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： TAKAO HIROMI , KIMURA KATSUHISA , FUJII AKIRA
IPC分类号： F25B43/00
摘要： PURPOSE:To prevent a compressor from sucking a liquid refrigerant at the time of operation by a method wherein a liquid tank is wrapped by a double structure and the tank is arranged at a location lower than the compressor in a gravitational direction and at the suction side of the compressor a pressure switch and a relay operated at a set suction pressure are installed. CONSTITUTION:The outer circumference of a liquid tank 1 is wrapped by a cylindrical tank 2 and a cover 3 and another room which has a double tank structure and keeps a perfect air tightness from the tank 1 is installed. The low pressure refrigerant from a vaporizer is caused to flow through a large space in the tank 2 and gasified by using the heat of the high pressure refrigerant in the tank 1 and then is sent to a compressor through a discharge hole 5 installed at the bottom of the tank 2. Next, by the reason that the location of the tank is lower than the compressor in a gravitational direction, the residual refrigerant liquid in the vaporizer and piping is able to be accommodated in the tank inside. Further, a pressure switch 6 and a relay 7 operating after detecting the pressure in the tank 2 are arranged between the coils of a voltage relay 9 controlling an electromagnetic clutch 8.

8. 发明专利

JPH04173417A AIR-CONDITIONING UNIT DOOR OPERATING MECHANISM FOR AIR-CONDITIONING DEVICE FOR AUTOMOBILE 失效
公开(公告)号：JPH04173417A
公开(公告)日：1992-06-22
申请号：JP29971290
申请日：1990-11-07
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： FUJINUMA YOSHIYUKI , TAKAO HIROMI
IPC分类号： B60H1/00
摘要： PURPOSE:To improve sealing ability of a door by reducing amount of a door receiver operation stroke and relieving an operation force by means of a boomeran-shaped cam and a spring and a lever with a built-in a slider. CONSTITUTION:A lever 3 through which switch doors 2a and 2b located to the interior of a cooling unit 1 are interlocked with each other is arranged to the lower part of a case. Meanwhile, a boomeran-shaped cam 6 is located at the upper part of a case to a lever 4 and a shaft 5. By working the lever 4, located to the upper part of a case, through a wire 7, through utilization of the spring action of a spring located in the lever 4, a slider 9 is slid, and the cam 6 is slid. Thus, the shaft 5 is reciprocated, the lever 3 is worked, and two doors 2a and 2b are interlocked with each other. This constitution can execute the operation through a low lever stroke 7 and improves sealing ability of a door during locking of the door.

9. 发明专利

JPH03141877A COMPRESSOR WITH SWASH PLATE 失效
公开(公告)号：JPH03141877A
公开(公告)日：1991-06-17
申请号：JP27766189
申请日：1989-10-25
申请人： HITACHI LTD
发明人： TAKAO HIROMI , OHASHI MOTOHIRO , YAMAGUCHI KAZUHIKO , TOYOSHIMA YASUHARU
IPC分类号： F04B25/04 , F04B27/08 , F04B27/10
摘要： PURPOSE:To reduce abnormal wear, sticking, etc., of a gliding member and prevent generation of contacting noise by arranging retainer and No.1 bearing means between a swash plate and the gliding member, and furnishing No.2 bearing means between the insides of retainer plates and the swash plate. CONSTITUTION:Between a swash a plate 9 and irregularly formed steel balls 20, 21 are furnished retainer plates 18, 19, which support the steel balls 20, 21 slidably, and rolling bearings 16, 17 which support them in such a way as rotatable relative to the swash plate 9. Ball bearings 24, 25 to support the retainer plates 18. 19 rotatably are arranged between the insides of these retainer plates 18, 19 and the swash plate 9. Thus the swash plate 9 rotates through the rolling bearings 16, 17, so that abnormal wear, sticking, etc., of the irregularly formed steel balls 20, 21 will be reduced, and also provision of ball bearings 24, 25 enables bearing the load inward directed in the radial direction of the retainer plates 18, 19 which should achieve generation of contacting noise.

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