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.

 

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