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21. 发明专利

JPH0270576A REAR WHEEL STEERING DEVICE 失效
公开(公告)号：JPH0270576A
公开(公告)日：1990-03-09
申请号：JP22421888
申请日：1988-09-07
申请人： KAYABA INDUSTRY CO LTD , NISSAN MOTOR
发明人： MORI KAZUNORI , KATA KATSUKUNI , SUGIMOTO BUNICHI
IPC分类号： B62D7/14
摘要： PURPOSE:To prevent the rear wheels from becoming unsteady by the outer force and unnecessitate much motor current in turning a steering handle largely by making the spring constant of a first spring larger than the synthetic spring constant of a pair of second springs positioned on both sides. CONSTITUTION:A shaft 25 provided between a side rod 15 and a third rack 14 is pierced through a spring case 21 as well as a pair of stoppers 26, 27 are formed keeping a space at the shaft in the spring case 21. A pair of spring bearings 28, 29 are slidably fitted inside the stoppers 26, 27, and a first spring 30 with its initial load set as F0 is interposed between the pair of spring bearings 28, 29. Second springs 33, 34 are provided between the outsides of the spring bearings 28, 29 and both side walls 31, 32 of the spring case 21. The synthetic spring constant of the second springs 33, 34 is made larger than the spring constant of the first spring 30. As a result, rear wheels 17, 18 are prevented from becoming unsteady even if the outer force acts on the rear wheels when a vehicle is running.

22. 发明专利

JPH0262446A PLANET GEAR TYPE SPEED REDUCTION GEAR 失效
公开(公告)号：JPH0262446A
公开(公告)日：1990-03-02
申请号：JP21017088
申请日：1988-08-24
申请人： KAYABA INDUSTRY CO LTD
发明人： KATA KATSUKUNI , OTSUKA JOJI , MIYANAGA ICHIRO
IPC分类号： F16H1/28 , F16H35/10
摘要： PURPOSE:To make it possible to prevent the occurrence of a mechanical locking state of a tilted speed reduction gear even when it is overloaded by providing a friction type torque slip mechanism between a ring gear and case and constituting it in such a way that when it is overloaded, a ball is left from a recessed section to allow the ring gear to rotate. CONSTITUTION:The rotation of the a line side ring gear 101 of a friction type torque slip mechanism 107 is restricted in a normal movement. In the next step, when the rotary shaft 13a of a motor 13 will not move being caused by the breakdown of the motor 13 due to overload, a ball 115 is left from a groove 123 opposing the spring force of a torque spring 111 to rotate the A line side ring gear 101. Therefore, since the chock is absorbed, a mechanical locking state may not occur. Thus, even if overload in acted on a titled speed reducing gear, components can be prevented from being damaged without the occurrence of a mechanical locking state. In addition, the value of torque slip can be readily changed by varying the spring force of the torque spring 111.

23. 发明专利

JPH01314695A POWER STEERING DEVICE FOR BOAT PROVIDED WITH OUTERBOARD ENGINE 失效
公开(公告)号：JPH01314695A
公开(公告)日：1989-12-19
申请号：JP14865188
申请日：1988-06-16
申请人： KAYABA INDUSTRY CO LTD
发明人： KATA KATSUKUNI , SUGIMOTO BUNICHI , YAMADA MANABU , YOSHIDA MASAKI
IPC分类号： B63H25/26 , B62D5/04 , B63H25/42
摘要： PURPOSE:To equalize the right and left steering torques and to obtain steering torque corresponding to sailing conditions by transmitting the rotary force of a motor to be driven corresponding to steering operation and controlling the current command value of the motor corresponding to the value of table for cancelling the gyro effect and a value detected through a rotation sensor. CONSTITUTION:When a steering wheel is steered, an electric motor (m) is driven to assist the steering power. Motor current command value is controlled corresponding to a table value for cancelling the gyro effect and a value detected through a rotation sensor 58 by means of a controller (c). Since the current value of the motor (m) is approximately proportional to the output torque of the motor (m), the steering force can be controlled. Since the right and left steering torques are equalized and the output torque of the motor (m) depends on the engine rotation, steering force corresponding to sailing conditions can be obtained even upon occurrence of gyro effect.

24. 发明专利

JPH01132470A SAFETY DEVICE FOR POWER STEERING DEVICE 失效
公开(公告)号：JPH01132470A
公开(公告)日：1989-05-24
申请号：JP29033387
申请日：1987-11-17
申请人： KAYABA INDUSTRY CO LTD
发明人： KATA KATSUKUNI , SUGIMOTO BUNICHI
IPC分类号： B62D5/06
摘要： PURPOSE:To improve safety by forming a bridge circuit by means of a number of strain gauges, detecting the voltage of the ends of each strain gauge and the voltage differences between the strain gauges on the mutually opposite sides, and outputting an abnormality signal when voltage difference is generated. CONSTITUTION:The resistance values of a number of strain gauges 24-27 for detecting steering torque are equalized, and a bridge circuit is formed by these strain gauges 24-27 while making the strain gauges positioned on mutually opposite sides of the bridge circuit detect strains in the same direction. Differential amplifiers 28-31 as a first voltage detector for detecting voltages between A-D respectively are connected on both ends of each strain gauge 24-27. Also, differential amplifiers 33, 34 for detecting voltage differences between the differential amplifiers 28, 30 and 29, 31 respectively are provided, forming a second voltage detector for detecting voltage differences by these. Further, abnormality signal output devices 35, 36 are connected to the differential amplifiers 33, 34 respectively.

25. 发明专利

JPS63315370A MOTOR DRIVEN POWER STEERING DEVICE 失效
公开(公告)号：JPS63315370A
公开(公告)日：1988-12-23
申请号：JP14971787
申请日：1987-06-16
申请人： KAYABA INDUSTRY CO LTD
发明人： KOMAMURA SEIJI , KATA KATSUKUNI , HAYASHI MASATAKA , SUGIMOTO BUNICHI
IPC分类号： B62D6/02 , B62D5/04 , B62D6/00 , B62D101/00 , B62D119/00
摘要： PURPOSE:To aim at performing a rapid and accurate motordriven power steering control by connecting a differentiating circuit to a torque signal processing circuit so as to compensate a phase delay, and by providing a phase compensating circuit for adjusting a gain in accordance with a steering frequency, in a function generating circuit for controlling the output of a power steering motor in accordance with a torque and a vehicle speed signal. CONSTITUTION:A differentiating circuit 25 is connected to a processing circuit 23 for a torque output signal from a torque sensor 20 so as to compensate a phase delay between the torque signal and a motor. A phase compensating circuit (i) which advances the phase of the torque signal when the steering frequency is low but decreases the gain when the frequency is high, is arranged in the rear stage of a function generating circuit P for delivering an output level signal to the motor in accordance with signals from the torque signal processing circuit 23 and a vehicle speed signal processing circuit 29. Oscillation is restrained even in a high steering frequency range while a delay in the phase of the motor is compensated so as to make the operation of a steering wheel heavy, thereby it is possible to aim at performing a rapid and accurate motor driven power steering control.

26. 发明专利

JPS63240470A POWER STEERING DEVICE 失效
公开(公告)号：JPS63240470A
公开(公告)日：1988-10-06
申请号：JP2252888
申请日：1988-02-02
申请人： KAYABA INDUSTRY CO LTD
发明人： KOMAMURA SEIJI , SUZUKI KATSUHIRO , KATA KATSUKUNI
IPC分类号： B62D5/087 , B62D5/22
摘要： PURPOSE:To improve the return characteristic of a power steering (PS) control valve, by supporting a pinion shaft to be displaceably guided by a large diametric circle, eccentrically positioned to the bottom crossing at a right angle from the axial center of the pinion shaft, in order to actuate the sliding type PS control valve by the displacement of the pinion shaft in its rack lengthwise direction. CONSTITUTION:In the case of a rack-pinion type power steering (PS) in which the PS action is performed by transmitting the lateral displacement of a pinion shaft 5 in its rack lengthwise direction to a sliding type PS control valve, a guide hole 31, which supports bearings 6, 7 of the pinion shaft 5 to be displaceably guided, forms a true circle X2 of large diameter eccentrically positioned to the bottom by a distance (e) from the axial center of the pinion shaft 5. If a handle is controlled, the pinion shaft 5 is laterally displaced along the internal peripheral surface of the guide hole 31 by load resistance for the rack. Here the pinion shaft is displaced also in the bottom direction being given a self centering function in the time of returning to the neutral condition by upper urging force of the rack by a spring, and the PS control valve enables its return characteristic to be improved.

27. 发明专利

JPS6393678A REACTION FORCE MECHANISM OF POWER STEERING DEVICE 失效
公开(公告)号：JPS6393678A
公开(公告)日：1988-04-23
申请号：JP23841386
申请日：1986-10-07
申请人： KAYABA INDUSTRY CO LTD
发明人： SUZUKI KATSUHIRO , KATA KATSUKUNI
IPC分类号： B62D5/083
摘要： PURPOSE:To obtain a sufficient reaction torque with a small-sized device by providing a stub shaft for switching a rotary valve according to tortion of a tortion bar with a radially projecting stopper portion to be contacted by a plunger. CONSTITUTION:If a steering wheel is turned in either clock- or counterclockwise direction from a neutral position, a stub shaft 1 is also turned. A pinion shaft 2 connected to said shaft via a torsion bar 3, however, does not rotate due to direction change resistance and makes relative displacement within a range of angle theta. A rotor valve V is switched according to the relative displacement to steer a front wheel in a specified direction by means of a power cylinder. This steering makes a rack shaft 6 move and a pinion shaft 2 rotate to control the action of the valve V. When the stub shaft 1 makes a relative displacement within a range of angle theta, a press contact force between a radially projecting stopper portion 15 of the stub shaft and a plunger 9 receiving pressures in a pressure chamber according to vehicle speeds is transmitted as a steering reaction force to the steering wheel. Thus, a sufficient reaction torque is obtained with a small-sized device to improve feeling of tightness.

28. 发明专利

JPS6312036B2 失效
公开(公告)号：JPS6312036B2
公开(公告)日：1988-03-17
申请号：JP14861280
申请日：1980-10-23
申请人： KAYABA INDUSTRY CO LTD
发明人： KOMAMURA SEIJI , KATA KATSUKUNI , SUZUKI KATSUHIRO
IPC分类号： B62D5/087 , B62D5/06 , B62D5/22

29. 发明专利

JPS632770A DECELERATING DEVICE FOR ELECTRIC POWER-STEERING 失效
公开(公告)号：JPS632770A
公开(公告)日：1988-01-07
申请号：JP14764586
申请日：1986-06-24
申请人： KAYABA INDUSTRY CO LTD
发明人： KOMAMURA SEIJI , KATA KATSUKUNI , OTSUKA JOJI , SUGIMOTO BUNICHI
IPC分类号： B62D5/04
摘要： PURPOSE:To get rid of an impact at a time of sta-rting and also prevent the occurrence of a foreign sound caused by the impact by shifting the phases of a pair of ring-gears and removing the backlash of a torque transmission direction. CONSTITUTION:The motor shaft 2 of an electric motor m is made to protrude into the casing 1 of a reducer a, and a sun gear 3 is fixed to this protruding portion. Planetary gears 4, 5 divided into two are made to mesh with the sun gear 3, and also a pair of ring gears 6, 7 meshing with gears 4, 5 are made to be rotatable freely against the casing 1. For these ring gears 6, 7 cut-outs 12, 13 having wall faces 12a, 13a which are at right angles to the tangential directions of gears 6, 7 are formed and their directions are made to be reverse. And when the motor shaft 2 is stopped, gears 6, 7 revolve within the limits of long holes 8, 9 by the push-pressing force of the tangential directions and then a backlash is removed by presstouching the cog-face of the gear of the side meshing with each other.

30. 发明专利

JPS62283008A ROLL CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPS62283008A
公开(公告)日：1987-12-08
申请号：JP12328986
申请日：1986-05-30
申请人： KAYABA INDUSTRY CO LTD
发明人： KOMAMURA SEIJI , SUZUKI KATSUHIRO , KATA KATSUKUNI
IPC分类号： B60G17/00 , B60G17/015
摘要： PURPOSE:To reduce the inclination of a vehicle body in accordance with the degree of rolling and improve traveling stability by providing a means of detecting the steering of a vehicle and feeding pressure oil corresponding to the vehicle speed to a suspension cylinder on the outside at the time of making a turn, when steering is detected. CONSTITUTION:Shock absorbers 13A, 13B and suspension springs 19A, 19B are provided on the suspension means of rear wheels 10A, 10B. And, an oil pump 21 which is interlocked with a shaft part whose rotating speed varied in accordance with vehicle speed is provided for the shock absorbers 13A, 13B in order to adjust the posture of a vehicle body. A roll control valve 23 is switched over being interlocked with the operation of a handle 2 and, by means of this roll control valve 23, pressure oil from the oil pump 21 can be selectably fed to the shock absorber 13A, 13B via passages 26A, 26B. And, by switching over the roll control valve 23 being interlocked with the operation of the handle 2, pressure oil having a flow rate corresponding to the vehicle speed is fed to either the shock absorber 13A or 13B on the outside at the time of making a turn.

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