摘要:
A base 36A of an output shaft 36 is made up of a rod member 36B, and a holder 43 having a bottom 43A. A stop 42 is formed separately from the holder. The holder has a reduced diameter portion 43B, in which an outer coiled spring 41A and an inner coiled spring 41B are disposed, and a piston 40 is disposed rearward thereof, and an increased diameter portion 43D in which the stop is disposed, and a reaction disc 35 is disposed rearward thereof.
摘要:
A depth control system particularly useful for single point depth control on an agricultural implement includes a valve and actuator mounted directly to the pivotal connection areas of a hydraulic cylinder that controls height. Cylinder motion directly controls valve actuation independently of complicated linkages to reduce the size and cost of the system and substantially overcome hysteresis problems.
摘要:
A fluid controller (27) for use with a fluid pressure operated device (45) having an inlet (47) and an outlet (49) and defining a fluid leakage path therebetween. The controller (27) includes valving (61) defining a main fluid path and further defines a fluid bleed passage including a variable bleed orifice (AB), having a substantially zero flow area when the controller valving (61) is in its neutral position (N) and in the normal operating position (R), but beginning to open as the valving approaches its maximum displacement position (R-M).
摘要:
In a control valve of the vacuum booster, a valve portion is fitted with a valve cylinder to be slidably contacted with an inner wall of the valve cylinder, to form within said valve cylinder, a front annular chamber closed by a front face of the valve portion when the valve portion is seated on a vacuum introduction valve seat, and a read annular chamber, to which the rear of the valve portion is faced. The front annular chamber communicates with a first port, and the rear annular chamber communicates with a second port. An input rod is moved forward to separate the valve portion from an atmosphere introduction valve seat and to seat it on the vacuum introduction valve seat. Then, the valve portion is urged in accordance with the set load of a valve spring and the pressure difference between the front and rear annular chambers.
摘要:
A rotary disk valve for motor vehicle power steering systems includes rotary disk which is connected non-rotatably to a valve inlet element. A control bushing is connected non-rotatably to a valve outlet element. These two valve elements are disposed so that they are coaxially movable into one another and are rotatable by at most the amount of torsion of a dead travel coupling. The two valve elements have longitudinal control grooves, which interact with one another for controlling a pressure medium to and from two working areas of a servo motor and to a return connection for a pressure medium container. The rotary disk is connected via a torsion bar spring to the valve outlet element. The longitudinal control grooves of the radially internal valve element connected to the return connection are connected to an internal space of the radially internal valve element. The torsion bar spring is supported in this internal space via a roller bearing. The return from the inner space of the radially internal valve element to the return connection occurs through the roller bearing and through the dead travel coupling.
摘要:
In this invention, an idea is adopted in which the pressure at a forward portion and a backward portion of valve device is steppingly dropped twice. The valve device of the present invention includes, on the axis of a spool 600, a first valve 710 located nearer an inlet port and a second valve 720 located nearer an outlet port. A throttling area made by the second valve 720 is larger than a throttling area made by the first valve 710. For example, of all the pressure difference equal to 120 kg/cm2 or more reauired at the forward and backward portions of the valve device, a portion in the range where the problem of an occurrence of a foreign noise is not encountered (for example, a portion ranging from 100 to 120 kg/cm2) is undertaken by the first valve 710, and the remaining portion ranging from 20 to 30 kg/cm2 is undertaken by the second valve 720. By doing so, there can be eliminated such a pressure difference where a generation of a noise before and after an actual throttling (including a primary throttling made by the first valve 710 and a secondary throttling made by the second valve 720) can become a problem.
摘要翻译:在本发明中,采用将阀装置的前部和后部的压力逐步下降两次的思路。 本发明的阀装置在阀芯600的轴线上包括位于更靠近出口端口的入口端口和第二阀门720附近的第一阀门710。 由第二阀720制造的节流区域大于由第一阀门710制成的节流区域。例如,在阀装置的前部和后部部分的所有压力差等于120kg / cm 2或更多, 在第一阀710进行没有遇到异物发生的问题的范围(例如,100〜120kg / cm 2的范围)的部分,其余部分为20〜30 kg / cm 2由第二阀720进行。通过这样做,可以消除在实际节流前后产生噪声(包括由第一阀710产生的主节流和二次节流) 由第二阀720制造)可能成为问题。
摘要:
An improvement of a reaction disc 25 and a valve plunger 8 disposed in a booster is provided. A recess 25a is formed in a rear end face 25b of the reaction disc while a projection 31a from the valve plunger 8 is loosely fitted into the recess 25a. When the break booster 1 is operated, the peripheral surface and the bottom of the recess 25a abut against the projection 31a, and the rear end face 25b abuts against the end face 31c of a plunger 31, whereby a brake reaction is transmitted to an input shaft 21. When an input or a force of depressing a brake pedal is reduced during the operation, a resistance is applied to a rearward retracting movement of the valve plunger 8 by the peripheral surface of the recess 25a. The invention allows the hysteresis to be increased without increasing the hardness of the reaction disc 25.
摘要:
A vacuum servo booster 10 for vehicle brake systems includes a housing 14, movable walls 17 and 20, a power piston 22, an input member 28, an input rod connected to a brake pedal 80, a valve mechanism 34, an output rod 49, and an actuator 41. In the vacuum servo booster 10, the input rod 27 has a front portion 271 and a rear portion 272 which are telescopically connected at a portion 273 within the power piston 22.
摘要:
A reaction arrangement on a hydraulic servo-valve arrangement which is designed in the manner of a rotary-slide arrangement, with a rotary slide and with a control bush coaxially surrounding the rotary slide and rotatable relative to the latter, in particular for power steering systems of motor vehicles. Arranged on a shaft part located on the rotary-slide side are axial V-grooves, into which reaction bodies can be pressed with controllable hydraulic pressure. The reaction bodies are guided radially on a bush portion connected fixedly in terms of rotation to the control bush.
摘要:
A vacuum brake booster (10) has a control valve housing (30) for a control valve (28) actuated by a bar shaped input member (34). A guide sleeve (42) is secured to the control valve housing and has a slot (68) aligned with a vent duct (62) in the control valve housing. A sensing plunger (36) is axially slidable in the guide sleeve by the input member, and a transversely extending stop bar (66) is fixed to the sensing plunger. The stop bar extends through the slot of the guide sleeve and into the vent duct. To improve flow through the vent duct, edges of the slot form axial stops for the stop bar, so that the axial extension of the slot defines the maximum stroke of the sensing plunger. Where the stop bar extends into the vent duct, the vent duct is obliquely oriented towards a working chamber (26), and has an axial extension considerably larger than that of the slot.