Pneumatic transporting device tracking steps with electric control
(57) Abstract:The invention relates to the field of engineering. The device includes separating the two chambers of the power element with a drive shaft. Movement of the power element is achieved by creating a higher air pressure in the chamber, where the drive shaft, as compared with the pressure in the other chamber. The control device is a spring-loaded locking element of the valve mechanism, which also has a movable and a fixed seat, and a solenoid, the armature of which is connected movable saddle valve mechanism. The armature of the electromagnet and both saddle valve mechanism placed on different sides of the locking element. A cavity located between the seat valve mechanism connected to the chamber in which is mounted a drive shaft. The device has high performance and is simple and reliable design. 2 Il. The technical solution relates to mechanical engineering and relates to pneumatic transporting device tracking actions used to control clutch transmission vehicles.To facilitate control of the clutch in their drive use measures one of which, called the chamber or cavity of the regulated pressure is communicated through the solenoid valve with a source of high or low air pressure (see for example, U.S. patents NN 2514002, 2628696, 2631702, 2634838, 4134482, patent in Germany N 2637636).As a prototype of the selected pneumatic transporting device tracking steps with electrical control, comprising a housing, a power element with a drive shaft, dividing the inner space of the housing chamber, the valve mechanism having a movable and a stationary seat and a spring-loaded closing element, an electromagnet, an armature connected to the movable saddle mentioned valve mechanism, the elastic element is located between the power element and the armature of an electromagnet (see issued in the USSR author's certificate N 1131688, IPC B 60 K 41/02, 1983).In this transporting device, the armature of the electromagnet and saddle valve mechanism is placed on one side of the locking element, and a cavity located between the seat valve mechanism, connected to the camera, which includes an electromagnet.To move the rod if necessary to switch off the clutch lower the air pressure in the chamber, to the. However, to ensure a rapid emptying of the chamber comprising a pneumatic device requires additional use of a special receiver, in which pre-generated vacuum. This is achieved by connection of the receiver with the intake manifold of the internal combustion engine.Task - create a high-speed pneumatic transporting device tracking steps, electrically operated, having a simple and reliable design.To solve this problem in the pneumatic transporting device tracking steps with electrical control, comprising a housing, a power element with a drive shaft, dividing the inner space of the housing chamber, the valve mechanism having a movable and a stationary seat and a spring-loaded closing element, an electromagnet, an armature connected to the movable saddle mentioned valve mechanism, the elastic element is located between the power element and the armature of the electromagnet, the armature of the electromagnet and both saddle valve mechanism placed on different sides of the mentioned locking element, and a cavity located between the seat valve mechanism, connected with cameras the STS witness the actions of the movement of stock to make work is the result of creating a higher air pressure in the chamber, where is the rod. Moreover, the specified action is performed when it is used to create a differential pressure of air as a source of high pressure, i.e. compressor, and a source of low pressure, i.e. vacuum. Since the working stroke, providing off clutch, occurs in the air intake into the chamber, and not due to its release, the moving rod is made quickly enough. The result is quick off the clutch and slower, and therefore smooth its inclusion. When bringing the device in action and regulation of the rate of movement of the rod by using only one valve mechanism.The figure 1 shows a pneumatic transporting device tracking steps with electric control, for actuation which is a source of low pressure, i.e. vacuum.The figure 2 presents a similar device, to actuate which uses a source of high pressure.Depicted in figure 1 pneumatic transporting device includes a housing 1 in which is located the power element 2, sotaamapyesot the clutch of a vehicle transmission (not shown), and the diaphragm 5, is installed on the support piece 3. Referred to the support piece and the diaphragm divides the space inside the housing 1 on the camera 6 and 7.If the supporting parts of the power element is used piston with o-ring seals, the need to use aperture disappears.Chamber 6 in which is located the drive shaft 4, is the camera of the regulated pressure in the chamber 7, where the electromagnet 8, the pressure in the process is not changed, i.e., this camera is a camera constant pressure.Inside the housing 9 of the electromagnet 8 is the excitation winding 10 and the anchor 11, located in the space between the end walls 12 and 13 of the electromagnet. Between the armature 11 and the power element 2 in stock 4 is elastic element 14, which is a compression spring.The electromagnet 8 is designed to control the valve mechanism 15, a housing 16 which is connected to the housing 9 of the electromagnet.Part of the valve mechanism 15 comprises an annular locking element 17 that communicates with the compression spring 18, which abuts the wall 12 of the housing of the electromagnet, a fixed seat 19, which is part corpus.net 8.In this implementation valve mechanism movable seat 20 and the fixed seat 19 are arranged relative to the locking element 17 with one hand, and the anchor 11 of the electromagnet on the other side.The chamber 7 of the housing 1 through the pipe 22 is constantly communicating with a source of low pressure (vacuum), which may be the intake manifold of an internal combustion engine (not shown).Between the wall 12 of the electromagnet and the locking element 17 has a seal 23 to isolate the chamber 7 from the atmosphere.The cavity 24 located outside of the locking element 17, are constantly connected through the opening 25 with the atmosphere.The cavity 26 between the seat 19 and 20 through conduit 27 communicates with the chamber 6.On the housing 1 and the shaft 4 is fixed elastic sealing element 28 to isolate the chamber 6 from the atmosphere. The output 29 of the winding 10 is connected to the variable voltage source (not shown).The device according to figure 1 operates as follows.On the power element 2 from right to left acting force FSPtransmitted to the rod 4 from the springs of the clutch (not shown). In the same direction to force the AI to the power element affects the force Fcreated as a result of differential air pressure on both sides of the support element 3.As a result of these efforts, the power element is mounted in position, which corresponds to the equality of forces FSP+ FOS= F. Thus, the larger the value of Fthe further inside of the case 1 is moved to the power element 2 acting on the clutch. The result of decreases the torque transmitted by the clutch, up to full off when end position of the power element. The force Fdepends on the air pressure created in the chamber 6, which is regulated by the action of the valve mechanism 15. In turn, the valve mechanism is controlled by the electromagnet 8, the armature 11 which acts on the movable seat 20. If the anchor 11 of the electromagnet is in its rightmost position (as shown in figure 1), the movable seat 20 moves away from the locking element 17, and the element under the influence of spring 23 moves to the right, meaning that it is pressed against the stationary seat 19. As a consequence, the chamber 26 of the valve mechanism 15, is constantly soamsawali through the pipe 27 with the chamber 6, first, loses touch with atmo provides for the communication between the chambers 6 and 7 by establishing in them the same values of air pressure (vacuum).This position of the valve mechanism corresponds to the condition F= 0, so the power element 2 under the action of the spring clutch is moved to the leftmost position, which corresponds to the full inclusion clutch.When the anchor 11, the electromagnet is moved to the leftmost position, the movable seat 20 presses on the locking element 17 and removes it from the fixed seat 19. As a result, firstly, the link is broken between the chambers 7 and 26 and, secondly, through the opening 25 in the housing 16 of the valve mechanism 15 provides for the communication of the chambers 26 and 6 with the atmosphere.In this position the valve mechanism has the largest difference in magnitude of air pressure in the chambers 6 and 7, which corresponds to a maximum value of the effort F. Under the action of this force power element 2 is moved to its rightmost position, which corresponds to the fully off the clutch.Along with the considered modes of operation of the moving device, which correspond to two extreme positions of the armature 11, in particular its average position of the movable seat 20 only comes in contact with stop element 17, keeping him from stationary seat 19. In this case the hero 7. As a result, the pressure change in the chamber 6 is stopped and its value is maintained at the level which took place when there was a contact of the movable seat 20 and the locking element 17.The anchor 11 of the electromagnet 8, there are two oppositely directed forces, one of which (FOScreated as a result of compression of the spring 14, and the second force from right to left according to the figure 1, is a pulling force (Fem), developed by the electromagnet.The value of FOSvaries depending on the position of the rod 4, so it determines the magnitude of its displacement. Due to this, the spring 14 to move the device performs the functions of the feedback element during the drive clutch.Traction Femelectromagnet increases with increasing current Iempassing through the coil 10 of the electromagnet. If, for example, the power element 2 is in the position in which the force FOSthe spring 14 is less than the efforts of the Femdeveloped by the electromagnet, the passage through the winding of a certain current Iemthis will cause the armature 11 of the electromagnet will move to the leftmost position. Sun is giving the camera 6 through the opening 25 with the atmospheric pressure. As a result, the air pressure in the chamber 6 exceeds the pressure in the chamber 7, the result will be a movement of the power element from left to right, leading to an increase in the compression force of the spring 14. Such movement of the power element 2, resulting in a corresponding reduction of the torque transmitted by the clutch will be up until due to the increasing compression of the spring 14 to its force equal to the traction force of the electromagnet. When this happens, the armature 11 of the electromagnet will be set in a position in which the result of interaction between the mobile seat 20 and the locking element 17 is provided with a termination of the communication camera 6 camera 7, and the atmosphere.The higher current in the coil 10 of the electromagnet and, therefore, the more developed they force those at higher compression spring 14 will be achieved equality efforts FOSand Fem. As a consequence, the increase of current in the winding 10 of the electromagnet will cause a greater movement of the power element 2 inside the housing 1, which will result in a corresponding reduction of the torque transmitted by the clutch.Such movement of the power element will be possible only under the condition according to theOS= Femthe camera will be mounted constant pressure, the value of which will be the greater, the higher the current in the coil 10 of the electromagnet.If the change of current in the electromagnet winding its traction will be less than the compression force of the spring 14, it will lead to the displacement of the armature 11 in the extreme right position, the result will be the connection of the camera 6 camera 7.The result will start to decrease the air pressure in the chamber 6, which will lead to reduction efforts Fdeveloped power element and will cause it to move from right to left. The consequence of this move will decrease the compression force of the spring 14, and when this force will be equal to the tractive force of the electromagnet, its armature 11 and the movable valve 20 will be set in the position in which the stop message camera 6 camera 7, and the atmosphere.Accordingly, the decrease in current in the winding 10 will automatically provide for the establishment of such pressure in the chamber 6, which is required for the necessary movement of the power element increases to a predetermined magnitude of torque transmitted by the clutch.Thus, in moving the device NGO clutch, depending on the magnitude of the current Iemin the winding of an electromagnet. However, the law regulating the torque transmitted by the clutch is determined only by the characteristic change of the current Iemin function of the desired control setting (e.g., frequency of rotation of the motor shaft, the speed of the vehicle or the position of the body of the actuator of the fuel injection).Described the principle of operation of the moving device is not changed, if his actions are mutual source of low pressure (rarefaction) uses high pressure. This design mixing device presented in figure 2. It differs from the transporting device according to figure 1 consists, first, in that the camera 7 is connected not with the source of low pressure, and through the opening 30 with the atmosphere. In addition, the camera 26 is connected not with the atmosphere and through the pipe 31 with a source of high pressure.Moving the device according to figure 2 operates as follows.If the anchor 11 of the electromagnet is in its rightmost position (as shown in figure 2), the movable seat 20 moves away from the locking element 17, after which the camera 26 and 6, first, disconnect from the source of high pressure and, secondly, through the holes in the walls 12, 13 and the armature 11 of the electromagnet 8 is communicated with the chamber 7. The result is a connection between the chambers 6 and 7 with the establishment of the same (atmospheric) pressure. When this force is Fbecomes zero, and the power element 2 under the influence of the springs of the clutch is moved to the leftmost position, which corresponds to the full inclusion clutch.When the armature 11 of the electromagnet is moved to the leftmost position, the movable seat 20 presses on the locking element 17 and removes it from the fixed seat 19. As a result, firstly, the link is broken between the chambers 7 and 26 and, secondly, through the pipe 31 provides for the communication of the chambers 26 and 6 to a source of high pressure. Because the camera 6 is set higher air pressure than chamber 7, which through the hole 30 is continuously connected to the atmosphere, formed under the action of pressure difference on both sides of the security element 2 is moved to its rightmost position to ensure full clutch.If the anchor 11 is installed in progenitive seat 19, the interrupted message chambers 26 and 6 as a source of high pressure, and the chamber 7. As a result, the pressure change in the chamber 6 is stopped and its value is maintained at the level which took place when there was a rolling contact saddle locking element 17.The magnitude of this pressure and, consequently, the value of Fand conditions of the power element 2 is determined, as discussed in relation to the transporting device according to figure 1, only the strength of the current Iemin the coil 10 of the electromagnet 8.Due to this, and in moving the device made according to figure 2, for adjusting the position of the power element, and including, the displacements of the clutch to change the transmitted them point only needs required by law to regulate the amount of current in the coil 10 of the electromagnet 8 move the device. Pneumatic transporting device tracking steps, electrically operated, containing the power element with a drive shaft, dividing the inner space of the housing chamber, the valve mechanism having a movable and a stationary seat and a spring-loaded locking element, the electromagnetic is connected between the power element and the armature of the electromagnet, characterized in that the armature of the electromagnet and both saddle valve mechanism placed on different sides of the mentioned locking element, and a cavity located between the seat valve mechanism connected to the chamber in which is mounted a drive shaft.
FIELD: transport engineering.
SUBSTANCE: invention relates to power takeoff control devices of special automobiles. Proposed device to control clutch has pneumohydraulic booster and clutch master cylinder. Moreover, device contains additional clutch master cylinder connected to pneumohydraulic booster through hydraulic distributor providing operation of clutch at two modes, namely, traveling and power takeoff ones. Distributor is furnished with mode automatic interlock member. Device contains pickup operating at power takeoff mode in case of overload. Additional clutch master cylinder is provided with makeup tank. Hydraulic distributor can be furnished with mode selector handle or electromagnetic selector. To change over clutch from traveling into power takeoff mode, hydraulic distributor is furnished with electropneumatic drive with pushbutton in cab to switch on electromagnetic valve. Hydraulic distributor is furnished with hydropneumatic drive operated by clutch pedal to change over clutch operation modes.
EFFECT: improved operating conditions of clutch control device, improved convenience of control of clutch on special automobiles with power takeoff devices.
8 cl, 3 dwg
FIELD: transport engineering; automatic transmissions.
SUBSTANCE: proposed gearbox with two multidisk clutches contains two coaxial drive shafts arranged one inside the other, with fitted-on drive pinions of even and odd speeds. Gearbox is furnished additionally with standby clutch engagement system including part of circuit of working brake system consisting of brake pedal and master brake cylinder with possibility of connection through two position cock-distributor with underpiston space of working cylinder of standby clutch engagement system whose behind-the-piston space is coupled with engagement booster of one of clutches.
EFFECT: increased reliability and provision of mobility of vehicles.
SUBSTANCE: invention relates to transmissions. The transmission with friction engagement incorporates an input part, an output part dropping out of engagement with the input part and one throw-out device. One unloaded output part is out of engagement with the input part and, by means of the said throw-out device, is moved into a friction engagement with the input device. The aforesaid throw-out device is made up of a drive cylinder and a driven cylinder communicating via a hydraulic line. The said hydraulic line accommodates a pressure release device designed to dissipate pressure between the aforesaid cylinders.
EFFECT: higher reliability and simpler design.
21 cl, 4 dwg
SUBSTANCE: clutch control drive comprises a pedal linked up, by a rigid-braid cable, with the pneumatic control valve servo valve movable stem. The pneumatic control valve second end is yoke-jointed to the clutch disengagement lever arranged on the overrunning coupling inner race fitted free on the pin fitted aligned with the shaft and rigidly-thread-jointed thereon. The overrunning coupling is made up of an inner and outer races, rollers and pin. The overrunning coupling outer race is fitted on the shaft to be in contact with the inner surface via rollers. Note that the said outer surface accommodates a power lever. The gearbox accommodates pneumatic cylinder comprising a piston and con rod. A spring is arranged inside the said pneumatic cylinder between the piston and cylinder housing.
EFFECT: 3D-cabin vibration, ruling out pedal free travel.
SUBSTANCE: invention relates to automotive industry, in particular, to cylinders of hydraulic braking systems. Cylinder comprises cylindrical operating chamber accommodating sealed spring-loaded main piston and compensation bypass valve. Operating chamber is divided by main piston into compensation and pressure sections. Pressure section accommodates flexible element of the main piston. Compensation bypass valve is made up of smaller piston arranged and sealed in the main piston. Smaller piston face part is provided with metal ball or tapered body of revolution to get in contact via spring with bypass orifice of the main piston.
EFFECT: longer life, higher reliability, decreased wear.
SUBSTANCE: proposed clutch booster comprises housing accommodating control unit and sealed actuator. Said actuator consists of hydraulic and pneumatic pistons fitted on common rod. Pusher is arranged between rod and clutch disengagement drive element to move axially with said rod. Rod face on pusher side extends behind actuator face wall while rod is sealed in actuator face wall by wiper seal, cup or O-ring.
EFFECT: higher reliability.
SUBSTANCE: invention relates to clutch control backup components. Gearshift aid is connected to standard automotive system with mechanical gearbox and clutch hydraulic drive. Said gearshift aid allows fast gear shifting solely by the lever without using clutch pedal. It comprises extra master cylinder with electromagnetic drive connected thereto and drive throw-in relay, switch at gearshift lever and limit switch at clutch pedal. Switch built in mechanical gearbox lever closes electromagnetic drive feed relay circuit to throw in the clutch via said extra master cylinder and car hydraulic system.
EFFECT: easier control, higher safety.
3 cl, 2 dwg
SUBSTANCE: clutch drive comprises control component, for example, pedal with return spring coupled with tracer. Said tracer varies automatically air pressure in the clutch air actuator subject to clutch control component position, said that of air cylinder piston with rod acting on clutch lever. Tracer comprises the following elements: clutch control element position sensor, one normally-closed electromagnetic air valve, one normally-open air valve, clutch actuator chamber air pressure sensor and clutch electronic control unit. Said elements are interconnected as follows: clutch control element output is connected with control unit; normally-closed electromagnetic air valve input is connected with control unit, while its air input is connected with vehicle air system and air output is connected with actuator working chamber, electrical input of normally-open electromagnetic air valve is connected with control unit while its air input is connected with actuator working chamber and air output with atmosphere. Air pressure pickup pneumatic input is connected with actuator working chamber while its electric output is connected with control unit. The latter is supplied by vehicle onboard circuit. To up the response and adjustment accuracy, several one normally-closed electromagnetic air valves and one normally-open air valve can be incorporated with this system.
EFFECT: higher reliability.
SUBSTANCE: control device comprises an actuating cylinder connected to a pneulatic servo, a clutch release pivoted lever with forks and a pedal, a receiver, a compressor with a filter and a safety device. The control pedal is designed as a two-armed V-shaped lever, hinged at the point of inflection, and is spring-loaded on both sides of the arms. The ends of the double-arm lever interact with the clamps provided on the additional spring-loaded levers that act as movable electromagnet cores. Spring-loaded buttons providing circuit contact closure are installed on each arm of the two-armed lever. One arm of the two-armed lever is connected to the servo regulating the compressed air flow from the compressed air source to stem and piston cavities of the executive air cylinder actuator, which stem is pivotally connected to one end of the pivoted lever interacting with the clutch bearing. The opposite end of the pivoted lever is pivotally connected with the double-acting servo housing.
EFFECT: improved performance due tu selective switching without interruption of the power flow of even and odd rows of gearbox transmissions.
SUBSTANCE: vehicle is equipped with an engine (2) in the rear part (AR) and is equipped with a clutch system (3). The clutch system comprises a hydraulic pipeline (7) extending below the vehicle and connecting the transmitter (5) located in the front part (AV) of the vehicle and the receiver (8) located in its rear part (AR). The hydraulic pipeline (7) is located near the heat source (9) already existing in the vehicle, and is heated from said source (9).
EFFECT: increasing the clutch system reliability.
10 cl, 2 dwg
FIELD: fluid-pressure actuators.
SUBSTANCE: system of hydraulic valves comprises first actuating connection and the second actuating connection which are connected with the hydraulic consumer, system of supplying connections that has the connection with the pressure source and connection with the vessel, first valve system that disconnect the system from the pressure source or controllably connect it with the first actuating connection or the second actuating connection, second system of valves that disconnects the system from the vessel or connects it controllably with the first actuating connection or the second actuating connection, and control unit that controls the first valve system and second valve system. At least one valve system is provided with the pickup of the extent of opening connected with the control unit that controls the valve system depending on the signal from the pickup of the extent of opening and reference signal.
EFFECT: enhanced precision of control.
15 cl, 3 dwg
FIELD: flying vehicles.
SUBSTANCE: drive is designed to control speed of outlet member of electrohydraulic actuator in control systems of flying vehicles. Proposed drive has electronic units of control microprocessor and amplifier-inverter, dc communicator less motor, fixed-delivery pump, hydraulic cylinder, hydraulic compensator, make-up valves, safety valves, filter, hydraulic cylinder rod position pickup. It contains also electrohydraulic reverse valve with linear electric motor, reverse valve spool position pickup and reverse valve inlet and outlet differential pressure pickups. Pump is nonreversible, and hydraulic compensator is of wind-up make including spring unit, wind-up plunger, wind-up plunger lock, threaded bushing of wind-up plunger travel control and electromagnet to release wind-up mechanism of compensator. Control of speed of outlet member at low error signals of servodrive is made to provided throttling control and at mean and high error signals, to provide positive control.
EFFECT: improved reliability.
2 cl, 2 dwg