专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2002054529A FUEL PUMP 审中-公开
公开(公告)号：JP2002054529A
公开(公告)日：2002-02-20
申请号：JP2001207613
申请日：2001-07-09
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： TAKAHASHI YUKIO , MACHIMURA HIDENORI , HOSHI KIICHI
IPC分类号： F02M37/06 , F02M59/04 , F02M59/44 , F04B1/16
摘要： PROBLEM TO BE SOLVED: To provide a small fuel pump having high reliability and small pressure fluctuation by lubricating a driving part with a lubricating fluid. SOLUTION: A mechanism part for converting rotational motion to rock motion comprises a shaft 1 for transmitting external driving force, a swash plate 1a rotated by the shaft 1 and a rocking plate 7 for converting the rotational motion of the awash plate 1a to the rock motion. The rock motion of the rocking plate 7 causes a plurality of pistons 13 to reciprocate. A crank chamber 30 housing the swash plate 1a, the rocking plate 7 and the pistons 13 is divided into a fuel chamber 36 and a mechanism chamber 34 by bellows 40. Bearings 3, 4 for transmitting the driving force between the shaft 1 and the swash plate 1a of the mechanism part and bearings 5, 6 for transmitting the driving force between the swash plate 1a and the rocking plate 7 are disposed within the mechanism chamber 34 and lubricated with the oil. The plurality of pistons 13 are disposed within the fuel chamber 36 and each sucks and discharges the fuel.

2. 发明专利

JP2000073964A GEAR PUMP 失效
公开(公告)号：JP2000073964A
公开(公告)日：2000-03-07
申请号：JP24283898
申请日：1998-08-28
申请人： HITACHI LTD
发明人： AKASAKA YOSHIMICHI , HEIKO KENJI , NOGAMI TADAHIKO , KADOMUKAI YUZO , TAKAHASHI YUKIO
IPC分类号： F04C2/18
摘要： PROBLEM TO BE SOLVED: To restrict the leakage of the working fluid even at a high pressure at the time of using the working fluid having a remarkably low viscosity, and to sufficiently secure with a normal general working machinery by providing a groove part near an end of a cylindrical surface seal part of a seal block, and forming the end of the seal part into a cantilever shape. SOLUTION: When an input driving shaft is rotated for drive, pressure of the fluid sucked from a suction port 10 is raised to the set high discharging pressure, and discharged into a rear case. The high-pressure fluid filled in the rear case 2 works groove parts 9c, 9d provided in the seal block 9 at the same time. With this structure, cantilever parts 9e, 9f formed at the end of the cylindrical seal part of the seal block 9 are elastically deformed to the cylindrical seal surface side of a side plate, and surface contact of both the cylindrical surface seal parts is realized. Even in the case where unevenness is generated in the main dimension of both the seal part, sealing property in the cylindrical surface seal part between the side plate and the seal block can be improved.

3. 发明专利

JPH10252589A FUEL SYSTEM AND GEAR PUMP OF ENGINE FOR VEHICLE 失效
公开(公告)号：JPH10252589A
公开(公告)日：1998-09-22
申请号：JP5736297
申请日：1997-03-12
申请人： HITACHI LTD
发明人： HEIKO KENJI , KADOMUKAI YUUZOU , TAKAHASHI YUKIO , OKUNA KENJI , KITA YASUO
IPC分类号： F02M37/00 , F02M37/04 , F02M37/06
摘要： PROBLEM TO BE SOLVED: To prevent occurrence of cavitation in a fuel pump by forming a low pressure fuel circulating hole in a seal member for sealing the tips of a pair of gears, taking a meshing part of both bears and the case interior except a seal part as a high pressure fuel circulating part, and providing a gear pump, a tip seal angle of which is specified. SOLUTION: In a fuel system of an engine for a vehicle to which a seal block type gear pump 3 is applied, fuel is injected from a fuel injection valve, a suction port 35 serving as a suction circulating hole is formed on both side plates of the gear pump 3, and a seal member (hereinafter referred to as a seal block) 33 is for sealing the tips of a pair of gears near the suction port 35 is provided. The seal block 33 is provided separately from a gear case, and provided between one to two tips near the low pressure side meshing part. A low pressure fuel circulating hole is formed on the seal block. The meshing part of both gears 31, 32 and the case interior except a seal part are taken as a high pressure fuel circulating part, and the tip seal angle is set about 35 deg.±5 deg. (number of teeth = 14-18).

4. 发明专利

JPH1082353A FUEL PUMP 失效
公开(公告)号：JPH1082353A
公开(公告)日：1998-03-31
申请号：JP23803996
申请日：1996-09-09
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： TAKAHASHI YUKIO , MACHIMURA HIDENORI , HOSHI KIICHI
IPC分类号： F02M59/08 , F02M59/04 , F02M59/44 , F04B1/12 , F04B1/14 , F04B9/02 , F04B27/10 , F04B53/10 , F04B53/18
摘要： PROBLEM TO BE SOLVED: To provide a fuel pump high in relaibility, small in pressure fluctuation and small in size by lubricating a driving part by using a fluid with lubricity. SOLUTION: It is constituted of a shaft 1 to transmit driving force from outside as a mechanism part to convert rotary motion to oscillating motion, a cam plate 15 to be rotated by the shaft land an oscillating plate 7 to convert rotary motion of the cam plate 1a to oscillating motion. A plural number of pistons 13 are reciprocated by oscillating motion of the oscillating plate 7. The cam plate 1a, the oscillating plate 7 and a crank chamber 30 to store the pistons 13 are separated into a fuel chamber 36 and a mechanism chamber 34 by a bellows 40. A bearing part is oil lubricated by arranging bearing parts 3, 4 to transmit driving force between the shaft 1 and the cam plate 1a in the mechanism part and bearing parts 5, 6 to transmit driving force between the cam plate 1a and the oscillating plate 7 in the inside of the mechanism part 34. Fuel is sucked and discharged by the respective pistons by arranging a plural number of the pistons 13 in the inside of the fuel chamber 36.

5. 发明专利

JP2555026B2 失效
公开(公告)号：JP2555026B2
公开(公告)日：1996-11-20
申请号：JP11732286
申请日：1986-05-23
申请人： HITACHI LTD
发明人： KAWASHIMA KENICHI , SUGINUMA ATSUSHI , TAKAHASHI YUKIO , TOJO KENJI , TAKAO KUNIHIKO
IPC分类号： F04B27/14 , F04B27/08 , F04B27/10 , F04B27/16 , F04B27/18 , F25B1/00
摘要： A refrigeration system includes a variable-capacity compressor having a compression chamber for sucking and compressing a refrigerant and a crankcase surrounding a swash plate forming a drive portion for suction and compression, and a passage through which the refrigerant discharged from the outlet of the compression chamber passes at least through a condenser, an expansion means and an evaporator and is sucked into the inlet of the compression chamber of the compressor, the capacity of the compressor being changed by slanting the swash plate during its rotation. A pressure control device is provided in a refrigerant passage between the evaporator and the suction valve of the compressor whereby the pressure upstream thereof is controlled in such a manner that it does not decrease below a predetermined value, thereby preventing frosting of evaporator fins. A point partway along the passage upstream from the pressure control device and the crankcase of the variable-capacity compressor are communicated so that the capacity of the compressor may be controlled without controlling the pressure in the crankcase.

6. 发明专利

JPH0629821B2 失效
公开(公告)号：JPH0629821B2
公开(公告)日：1994-04-20
申请号：JP16919883
申请日：1983-09-16
申请人： HITACHI LTD
发明人： SHIMADA SATOSHI , KOBORI SHIGEYUKI , KAWAKAMI KANJI , TAKAHASHI YUKIO
IPC分类号： G01L9/00 , G01L13/00 , G01L13/06 , G01L19/00

7. 发明专利

JPH05215067A COMPRESSOR 失效
公开(公告)号：JPH05215067A
公开(公告)日：1993-08-24
申请号：JP1872892
申请日：1992-02-04
申请人： HITACHI LTD
发明人： MUNAKATA AKIHIRO , TAKAHASHI YUKIO
IPC分类号： F04B27/08
摘要： PURPOSE:To improve seize resistance with less lubricating oil quantity by setting the lowest value of the clearance between a mechanism part and the inner wall of a member enclosing the mechanism part less than a regulated gap in the area having a specified value or more of the total amount of circumferential angles. CONSTITUTION:A swash plate 12 rotated together with a shaft 3 to be oscillated to a piston support 22, and a drive plate 10 for rotating the swash plate 12 are provided. A front housing 6 for enclosing the piston support 22 and the swash plate 12 and rotatably supporting the shaft 3 in the center part is also provided. The lowest value of the clearance 65 between one or more parts of the piston support 22, the swash plate 12 and the drive plate 10 and the inner wall of the front housing 6 is set less than a regulated gap in the area in which the total amount of circumferential angles is 120 deg. or more. Thus, the lubricating oil stirred by the rotating of the swash plate 12 and the like is efficiently delivered to a nutating part, and the oil supply to the nutating part inner part is promoted.

8. 发明专利

JPH0553946B2 失效
公开(公告)号：JPH0553946B2
公开(公告)日：1993-08-11
申请号：JP6907087
申请日：1987-03-25
申请人： HITACHI LTD
发明人： TAKAHASHI YUKIO , HAYASE ISAO , SUGINUMA ATSUSHI , KAWASHIMA KENICHI , YAMAMOTO KYOSHI , USUI HIDEO , TAKAO KUNIHIKO , MIZUKAMI MASAO
IPC分类号： F04B27/02 , F04B27/08 , F04B27/10

9. 发明专利

JPH0587046A COMPRESSOR FOR AIR-CONDITIONING OF AUTOMOBILE 失效
公开(公告)号：JPH0587046A
公开(公告)日：1993-04-06
申请号：JP25114991
申请日：1991-09-30
申请人： HITACHI LTD
发明人： MACHIMURA HIDENORI , TAKAHASHI YUKIO , KISHI ATSUO , ITO MASARU
IPC分类号： F04B27/14 , F04B27/08 , F04B49/00
摘要： PURPOSE:To secure a sufficient oil film between a piston ring and a cylinder bore constantly, and to realize an operation for a long period, by setting the stroke of the piston at the minimum capacity operation of a compressor larger than the width the piston ring contacts to the cylinder bore. CONSTITUTION:When a driving shaft 1 is rotated together with a drive plate 2, a swash plate 3 is oscillated. And a piston 13 contacting with the swash plate 3 is reciprocated in the cylinder bore 16, and a piston ring 14 is slided. Furthermore, a sliding body 7 connected to the swash plate 3 is moved on the driving shaft in the axial direction. In such a compressor, a stopper 8 as a control means to regulate the movement of the sliding body 7 is fixed to the driving shaft 1. And the stroke of the piston 13 at the minimum capacity operation is set larger than the width the piston ring 14 is contacted to the cylinder bore 16. Consequently, a sufficient oil film is secured constantly between the piston ring 14 and the cylinder bore 16, and thereby the minimum capacity operation of the compressor is made possible to carry out for a long period.

10. 发明专利

JPH04203366A COMPRESSOR FOR AIR CONDITIONER IN VEHICLE 失效
公开(公告)号：JPH04203366A
公开(公告)日：1992-07-23
申请号：JP32903290
申请日：1990-11-30
申请人： HITACHI LTD
发明人： TAKAHASHI YUKIO , SUDO TOSHIO , ITO MASARU
IPC分类号： F04B27/08 , F04B35/00
摘要： PURPOSE:To reduce a vibration generating force and a transmitting amount of vibration toward a vehicle body and further to prevent an occurrence of abnormal sound inside a vehicle by a method wherein a sum of a radial gap of a bearing itself and a fitting gap between an inner ring and a fitted part of a compressor is more than a predetermined size. CONSTITUTION:A fine vibration generated from a bearing 27 of a pulley 24 driven by a belt under an operation of an engine and for transmitting a power force to a compressor is transmitted to an outer contour part of the compressor, transmitted through an engine mount system, transmitted to an instrument panel in the vehicle to generate an abnormal sound and further the instrument panel and an evaporator are oscillated to generate abnormal sound. Due to this fact, a reduction of vibration at the bearing part of the pulley 24 causes a noise inside the vehicle to be reduced. Due to this fact, a sum delta of a radial gap of the bearing 27 itself and a fitting gap between an inner ring 28 and the fitting part of the compressor is set to have a value more than delta=50 alphad when a thermal expansion coefficient difference alpha of the bearing material quality and the fitting material quality at the compressor and a fitting part diameter phid are applied.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式