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1. 发明专利

DE69820809D1 未知
公开(公告)号：DE69820809D1
公开(公告)日：2004-02-05
申请号：DE69820809
申请日：1998-04-09
申请人： TOYODA MACHINE WORKS LTD
发明人： WATANABE KAZUHIRO , IMANISHI TAKASHI , HONAGA SUSUMU , INAGUMA YOSHIHARU , FUJIWARA HIDETOSHI , KATO HIDEYA
IPC分类号： B62D5/06 , F15B11/042 , F15B11/05 , F15B13/00
摘要： A flow control device, responsive to the rotational speed of a pump and to load pressure, has a simple structure. And a housing of the flow control device for saving energy can make use of a general pump housing (10) not for saving energy as a common housing. The flow control device of a power steering apparatus, arranged in a housing (10) of a pump, includes a flow control valve (37) and a load pressure responsive valve (61). The flow control valve (37) includes a bypass spool (30) with a control rod (50) penetrating a metering orifice (22). The load pressure responsive valve (61) is incorporated in a union for response to the load pressure. The control rod (50) is located on the bypass spool (30) for response to the rotational speed of the pump.

2. 发明专利

DE69820809T2 未知
公开(公告)号：DE69820809T2
公开(公告)日：2004-11-04
申请号：DE69820809
申请日：1998-04-09
申请人： TOYODA MACHINE WORKS LTD
发明人： WATANABE KAZUHIRO , IMANISHI TAKASHI , HONAGA SUSUMU , INAGUMA YOSHIHARU , FUJIWARA HIDETOSHI , KATO HIDEYA
IPC分类号： B62D5/06 , F15B11/042 , F15B11/05 , F15B13/00
摘要： A flow control device, responsive to the rotational speed of a pump and to load pressure, has a simple structure. And a housing of the flow control device for saving energy can make use of a general pump housing (10) not for saving energy as a common housing. The flow control device of a power steering apparatus, arranged in a housing (10) of a pump, includes a flow control valve (37) and a load pressure responsive valve (61). The flow control valve (37) includes a bypass spool (30) with a control rod (50) penetrating a metering orifice (22). The load pressure responsive valve (61) is incorporated in a union for response to the load pressure. The control rod (50) is located on the bypass spool (30) for response to the rotational speed of the pump.

3. 发明专利

JP2001003875A VANE PUMP 失效
公开(公告)号：JP2001003875A
公开(公告)日：2001-01-09
申请号：JP17421799
申请日：1999-06-21
申请人： TOYODA MACHINE WORKS LTD
发明人： INAGUMA YOSHIHARU , KATO TOSHIYA , TAKAGI HIDEJI , WATANABE KAZUHIRO
IPC分类号： F04C2/344
摘要： PROBLEM TO BE SOLVED: To attain positive push-out of vanes and prevent an operating fluid discharged from a higher pressure side discharge port, from leaking to a lower pressure side discharge port. SOLUTION: This vane pump is so constituted that side wall members are provided with intake ports 32, 33 opened to the intake areas of a pair of pump chambers P1, P2 formed between both major axis direction end parts of the inner peripheral surface 41 of a cam ring 4 and the outer peripheral surface of a rotor 5, and discharge ports 34, 35 independently opened to the respective discharge areas of the pump chambers P1, P2, that the faces, coming in sliding contact with the rotor 5, of the side wall members are provided with a plurality of arcuate back pressure grooves 36, 37 recessed to lead to the inner peripheral side end parts of slits 51 and that pump discharge pressure is led into these back pressure grooves 36, 37. Both discharge ports 34, 35 are respectively connected to separate actuators, and a control valve 60 for communicating only the discharge port higher in discharge pressure out of both discharge ports 34, 35, with the back pressure grooves 36, 37 is connected to both discharge ports 34, 35.

4. 发明专利

JPH10338153A FLOW CONTROL DEVICE IN POWER STEERING 失效
公开(公告)号：JPH10338153A
公开(公告)日：1998-12-22
申请号：JP26954197
申请日：1997-10-02
申请人： TOYODA MACHINE WORKS LTD
发明人： HONAGA SUSUMU , FUJIWARA EIJU , INAGUMA YOSHIHARU , KATOU TOSHIYA , WATANABE KAZUHIRO
IPC分类号： B62D5/07
摘要： PROBLEM TO BE SOLVED: To provide a load pressure sensitive flow control device sensing the rotating speed of a pump with simple constitution without changing the shape of a pump housing. SOLUTION: A load pressure sensitive valve 24 provided with a variable throttle 28 communicating a spring chamber 32 of a flow regulating valve 37 with a low pressure side 38 at the time of low load and cutting off communication between the spring 32 and the low pressure side 38 reacting to load pressure built up by steering operation is provided in a union 12. A bypass valve 30 of the flow regulating valve 37 is provided with a control rod 50. An end part 50b of the control rod 50 is protruded into a metering orifice 22, and the control rod 50 reacts to sliding of the by-pass valve 30 to change opening area of the metering orifice 22.

5. 发明专利

JP2000072009A FLOW CONTROL DEVICE IN POWER STEERING 失效
公开(公告)号：JP2000072009A
公开(公告)日：2000-03-07
申请号：JP23987098
申请日：1998-08-26
申请人： TOYODA MACHINE WORKS LTD
发明人： INAGUMA YOSHIHARU , KATO TOSHIYA , WATANABE KAZUHIRO , OWAKI MASAAKI
IPC分类号： B62D5/07
摘要： PROBLEM TO BE SOLVED: To miniaturize a flow control device in an energy-saving power steering to miniaturize a pump. SOLUTION: A relief valve 33 releasing pressure to the low pressure side when load pressure exceeds a set pressure is built in a load sensing valve 24 for communicating a spring chamber 18 of a pressure compensated flow control valve 16 with the low pressure side at the time of low load pressure and for cutting off communication between the spring chamber 18 and the low pressure side at the time of high load pressure. The pressure receiving area D1 of load pressure of the load sensing valve 24 and the pressure receiving area D2 of the spring chamber satisfy the relation of D1>D2, and the flow control valve 16 is formed in cylindrical shape to enclose a spring 19.

6. 发明专利

JPH1199950A FLOW RATE CONTROLLER OF WORKING FLUID FOR POWER STEERING 失效
公开(公告)号：JPH1199950A
公开(公告)日：1999-04-13
申请号：JP26625197
申请日：1997-09-30
申请人： TOYODA MACHINE WORKS LTD
发明人： INAGUMA YOSHIHARU , KATOU TOSHIYA , WATANABE KAZUHIRO
IPC分类号： B62D5/07
摘要： PROBLEM TO BE SOLVED: To secure a moderate steering force in high-speed traveling and to reduce any load pressure in cold starting, in the flow rate controller equipped with a flow rate regulating spool valve with a control rod. SOLUTION: A ball valve 25 in contact with a valve seat of a first inlet 23 is installed in a valve port 20 of a flow rate regulating spool valve 9, and also a direct-acting valve 26 in contact with a valve seat of a second inlet 24 is installed therein. A spring 27 is installed in space between the ball valve 25 and the direct-acting valve 26. In addition, a bypass port 28 is formed in the flow rate regulating spool valve 9 lying between the ball valve 25 and the direct-acting valve 26. Likewise, a control rod 30 piercing through the second inlet 24 and being inserted into a metering orifice 16 is installed at a tip part of the direct-acting valve 26. This control rod 30 consists of both first and second rod parts 31 and 32. In this connection, this first rod part 31 is smaller in its outer diameter than an inner diameter of the second inlet 24.

7. 发明专利

JPH08310424A POWER STEERING DEVICE 失效
公开(公告)号：JPH08310424A
公开(公告)日：1996-11-26
申请号：JP11590195
申请日：1995-05-15
申请人： TOYODA MACHINE WORKS LTD
发明人： SUZUKI MIKIO , INAGUMA YOSHIHARU , KATOU TOSHIYA , KABETANI TERUAKI , WATANABE KAZUHIRO
IPC分类号： B62D5/07
摘要： PURPOSE: To reduce radial installing space of a load pressure sensitive valve in respect to a pump housing. CONSTITUTION: A load pressure sensitive valve 50 comprises a spool valve 31 slidably inserted in a slide hole 30 formed in a pump housing 10a and a ball 34 held on one end of this spool valve 31 and a valve seat 33 on which the ball 34 is seated and also an inner hole 35 which is closed when the ball 34 is seated and a spring 38 for pressing against the ball 34 mounted on this valve seat 33 and energizing the ball 34 and the spool valve 31 in the direction to separate them integrally from the valve seat 33.

8. 发明专利

JPH11165647A FLOW CONTROLLER 失效
公开(公告)号：JPH11165647A
公开(公告)日：1999-06-22
申请号：JP8098398
申请日：1998-03-27
申请人： TOYODA MACHINE WORKS LTD
发明人： HONAGA SUSUMU , INAGUMA YOSHIHARU , KATOU TOSHIYA , IMANISHI TAKASHI , WATANABE KAZUHIRO
IPC分类号： B62D5/07 , F16K3/24
摘要： PROBLEM TO BE SOLVED: To provide a flow controller which can reduce inclusion of foreign matter due to mixing in hydraulic fluid, and prevent generation of unstable fluid flow control. SOLUTION: A negative pressure sensitive valve spool 9 is fitted in a union 5 so as to be capable of sliding. When negative pressure increases, the spool 9 moves to spring 10 side against the elastic force of the spring 10. The spool 9 is formed with a through hole 11 and a throttling passage 12. A pressure introducing passage 13 is formed at the union 5, and the pressure introducing passage 13 is connected to a communication passage 14. The hydraulic fluid pressure which is introduced from the through hole 11 through the throttling passage 12 is introduced into the spring chamber 32 of a fluid flow regulating valve 15 through the pressure introduction passage 13 and the communication passage 14. A pressure delivering passage 16 is formed at the union 5, and the pressure delivering passage 16 communicates with a delivering passage 17. A cut groove 18 is notched at the outer-periphery groove 9a of the spool 9 where the throttling passage 12 is opened to form a variable orifice 19.

9. 发明专利

JPH1143063A POWER STEERING UNIT 失效
公开(公告)号：JPH1143063A
公开(公告)日：1999-02-16
申请号：JP20481897
申请日：1997-07-30
申请人： TOYODA MACHINE WORKS LTD
发明人： INAGUMA YOSHIHARU , KATOU TOSHIYA , WATANABE KAZUHIRO
IPC分类号： B62D5/07
摘要： PROBLEM TO BE SOLVED: To reduce the discharge flow rate of an operating oil by providing a check valve between a rubber hose and a control valve. SOLUTION: A pump 1 is driven by an engine, the operating oil discharged from the pump 1 is introduced into a control valve 3 through a pressure port 10a formed on a gear housing 10. A rubber hose 6 is provided between the pump 1 and the pressure port 10a, whereby the pulsation of the operating oil discharged from the pup 1 is damped. In general traveling, the operating oil discharged from the pump 1 is carried to the control valve 3 through a minor diameter hole part, a major diameter hole part, a radial hole, and a space in order, and in kick back input, the ball 12 of a check valve 2 makes contact with the ball contact surface of a sheet union to prevent the counterflow of the operating oil.

10. 发明专利

JPH0930435A FLOW RATE CONTROLLER IN POWER STEERING DEVICE 失效
公开(公告)号：JPH0930435A
公开(公告)日：1997-02-04
申请号：JP18388395
申请日：1995-07-20
申请人： TOYODA MACHINE WORKS LTD
发明人： INAGUMA YOSHIHARU , KATOU TOSHIYA , WATANABE KAZUHIRO
IPC分类号： B62D6/02 , B62D5/07
摘要： PROBLEM TO BE SOLVED: To further reduce energy consumption and to provide a steering feeling during high-speed traveling by providing a solenoid valve for fixing the variable restrictor of a load pressure responding valve in an open condition according to an electric signal. SOLUTION: In a neutral state of steering, the variable restrictor 45 of a load pressure responding valve 31 is opened, the spring room 23 side of a flow rate control valve 27 is opened to a low pressure side and hydraulic oil discharged from a pump 10 is returned more to the sucking side of the pump. When a load pressure is increased by a steering operation in this state, the load pressure feeling and responding valve 31 is actuated and the variable diaphragm 45 is closed. Thus, the supplying flow rate of hydraulic oil supplied to a control valve 14 is increased to a maximum supplying flow rate. However, during high-speed traveling or the like, a solenoid valve 50 is actuated and the variable restrictor 45 of the load pressure responding valve 31 is fixed in an open state and thus, the state of a reduction in the supplying flow rate of hydraulic oil supplied to the control valve 14 is maintained even when a load pressure increases.

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