JPS6066401A - Solenoid - Google Patents

Abstract

PURPOSE:To enable selecting the direction in one way or another of a moving member and controlling the dimension of the movement by moving the member due to the difference of the polarity of a current applied to a coil and making the dimension of the movement proportional to the value of the current applied to the coil. CONSTITUTION:If a current is applied through a course from a terminal 24a passing coils 22, 23 to a terminal 24b, a magnetic flux as shown by an arrow is generated and a moving member 26 is moved to the right direction. In other words, a pole piece 32 repulses a magnetic pole 19 and attracts a magnetic pole 17. On the other hand, a pole piece 31 repulses a magnetic pole 21 and attracts a magnetic pole 20. Consequently, the moving member 26 is moved to the right direction. This moves a spool 4 to the right direction by a connecting rod 37 and connects a port 5 with a port 7 and a port 6 with a port 8 respectively. When the current is cut off, the moving member 26 returns to the neutral position by the force of a spring 36 and the spool 4 is also returned to the neutral position. On the other hand, if the current is applied in reverse polarity, the moving member 26 is moved to the left direction in the same way and the spool 4 is also moved to the left direction by the connecting rod 37. This connects the port 5 with the port 8 and the port 6 with the port 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a servo valve and a proportional solenoid valve used in mechanical devices such as a microtremor testing machine, an injection machine, a press machine, and a strain relief machine. Regarding the solenoid.

The object of the present invention is to provide a solenoid system which can selectively transfer the sound of a movable body to one side or the other, and whose movement dimension is the same on the open side 1.

The drawings showing the embodiments of the present application will be described below.

As is well known, the solenoid pulp has a valve device 1 and a solenoid 2.
It consists of First, in the valve device 1, 3 is a main body, and an oil passage is formed inside thereof as is well known. 4 is a spool, which, as is well known, is movable in the left and right directions in FIG. 5 is a pressure port, and 6 is a tank boat, each of which is connected to a hydraulic power source and a tank in a well-known manner. 7 and 8 are ports for connection to a well-known hydraulic system.

Next, in the solenoid 2, the main body 11 is made of magnetic paulownia material and is detachably attached to the main body 3 of the valve device by means of a fixing hole 11a. In this model, the branches are cylindrical yoke parts that also serve as a case. 13 is attached to one end of the cylindrical yoke portion 12;
15 is a cylindrical yoke part P in the middle part of the 4 cylindrical yoke members.
A flange-like yoke portion is shown which is connected to the other end portion in the form of an inner flange. 1.7 Magnetic pole body between fd, integrated with yoke part U (
(may be separate). 19. A magnetic pole body is integrally connected to the peripheral end of the mFi flanged yoke 14, and both are formed in an annular shape.

Reference numeral 21 denotes a magnetic pole body integrally connected to the inner circumferential end of the brim-like yoke portion 15, and is formed in an annular shape. η, Otsu are each carp/
I/f is shown, and as shown in the figure, the bearing body is connected with reverse polarity and is screwed onto the circumferential surface of the entire magnetic pole body 17 on both sides of the magnetic pole body 17. 16a is a communication hole. , is for balancing the urging force applied by pressure oil to the movable body, which will be described later. I8 is a fitting hole for fitting a wrench for rotating the 16 bearing bodies; !!5t
:+: Screwed onto the outer circumferential surface of the bearing body 16 with a screw thread.

Next, reference numeral 21i indicates a movable body provided inside the main body 11.

In this case, reference numeral 1 denotes a base body, which is formed into a round bar shape using a non-magnetic material, and is supported by a shaft part 16 mounted on one end of the base body so as to be movable forward and backward. The tsuba is integrally provided at one end of the body n, and the sword is a water-filled magnet disposed around the base body 27, which is formed into a cylindrical shape and has polarity as shown in the figure.

Is this magnet J one that has strong magnetic force compared to its size, such as a magnet using rare earth elements (for example, a samarium cobalt magnet)? Good to use. 31 and 321d, respectively, to remove the magnetic pole pieces. The permanent magnet beauty and these magnetic pole pieces 31.32 are the tsuba 4 and the base! It is tightened and integrated with the base I by the nuts screwed together. The grooves 11 and 32 are formed on the magnetic pole pieces 31 and 32, and are for oil circulation. Ah, the pressure spring is used as a spring to position the driving body in the neutral position, and between the spring seat 21a formed in a part of the spring & 5B magnetic pole body 21 and the magnetic pole piece 31. The spring shoulder is interposed between the bearing body 6 and the magnetic pole piece 32. 37 is continuous and integrated with the valve body 5 and the UiJ moving body adder.

Note that this may be formed integrally with the valve body 5 and the groups H and r of the aJ moving body, or may be formed separately and then integrated.

Next, the drive circuit of the solenoid valve is shown in Figure 9, where 41 is the input terminal of control@1i', 42 is IPl;
i fD, % is a width regulator, the number is an oscillator, 100 Hz-W,
It oscillates a sawtooth wave of about kHz. 4,
1 is a comparator, 45 is an inverter, 46.47 is a flow device,
48a and 48d are control function controllers, 49a to 48d, respectively.
It consists of a differential circuit that detects the difference in signals from 4Dd and reverse voltage (b), and a flat circuit that smoothes the difference.

Note that this may alternatively be constructed of two smoothing circuits that individually smooth all of the signals from the 50a and 50b, and a differential circuit that detects the difference between the smoothed signals. 52 indicates a DC power supply.

In the above configuration, the #1 receptor lti f is rotated to move it to the right or left in the first place, and when the coils 〃 and 〇 are de-energized, the movable body is placed in the neutral position. Place the spool in the position shown in Figure 1, that is, 5 liters.
r-1-7 and 8 are pressure boat 5 and tank s? -L for any of the Toro! llJ[11 Make it exist at a position other than . In this state, the bearing body 16 is fixed with the lock nut 6.

In such a device, from terminal 24a to Koi/l/J7
When power is applied to A2M■ through the entire route to terminal 24b, the first
A magnetic flux as shown by the arrow in the figure is generated, and the i3J moving body 6 moves to the right in the figure. That is, the magnetic force on the magnetic pole piece is repulsive with the magnetic pole body 19 and mutually attracted with the magnetic pole body 17, and the magnetic pole 3 is repulsive with the magnetic pole body 21 (7 magnetic pole bodies are attracted to each other, and as a result, the movable grave is As a result, the spool 4 moves to the right via the connecting rod 3'7 [7, the boat 5Vi'-door and the boat 6 respectively J!lt bend with the hoard 8. If it is cut off, the movement song will be blown away by the force of the seventh force.
The spool 4 returns to the neutral position as shown in the figure, and the spool 4 also returns to the neutral position. On the other hand, if the current is applied with the opposite polarity to the above, the movable station will move to the left in the figure due to the same effect as above, instead of requiring repeated efforts. It also moves to the left via the connecting rod 37 (7).This causes the port 1-
5! zt Horde 8 and Boat 6 are buried with Horde 7 respectively.
Width.

Next, the operation of the solenoid valve of the above configuration by control No. 18 is summarized in the time chart of Fig. S, and it is 1tfi.

I will clarify. In addition, a to r, j in FIG. S indicate the voltage No. 11 at the point indicated by ±1 on the right in FIG. 4, and g, FI, = indicate the current indicated by the arrow in the figure, respectively. First, a control 41 number as shown by a, for example, is added to the ska g443.

This signal can be a positive or negative DC signal, and can be used for a signal up to a maximum of 20 OL (Z).
Amendment 7 according to stream 1g has been added to 1 as indicated by b.
It becomes a ``bogo''. On the other hand, the oscillator Xun oscillates at full y = oscillation as shown in C. The frequency of this signal is 111! which is several times higher than the frequency of the control number 1B. iV will be selected. When the above signal is input, the signal (! indicates that the ratio is soft when the ratio is soft, and the comparator 44
When the level of the signal is higher than the level of h'J No. C, it outputs a signal di which becomes last, and when it is the opposite, it outputs a negative signal di. While the rectifier is rectified and becomes the number e, the other part is rectified to 1 and becomes iBsf.Receiving these signals, the transistors 48a and 48b iJ: (Q(j
-e is at the ■l level, transistor 4
80 and 48d are not conductive when the signal f is at H level, and a current as shown by b7 flows through the coils /I/ and 23.

To explain this current flow in detail, first, as shown in (A) in FIG.
From gL source 52 to transistor l8d1 coil O, B,
A current flows through the entire transferer 48C1 resistor 5cIa (see Figure S (b) h) in the path that returns to the power supply 52. Next, when the signal e becomes H level as shown in e→, the transistors 48a and 48'b become conductive, so the coils n and
6 i, the current tries to flow in the opposite direction to 1. 17
Since the coil ρ, 7.3 generates a back electromotive force, the resulting current (current in the direction of the arrow g) flows from the power supply 52 through the transistor 48a'1 to the coil B (in the direction of the arrow A current in the opposite direction to g) is passed from coil 4 to quasiode 49a, ? (52, resistor 50b, Gr-ord 49b) It flows in a path that curves to coil B. Therefore, it is difficult to flow to 1)b."El: i'
Ac becomes a negative value as shown by (-). Immediately, a current flows in the direction opposite to the arrow. The current due to this back electromotive force decreases with the passage of time as shown in Figure 1. When the signal f becomes H level again, a current flows in the path passing through the transistors 48c and 48d'1.This current increases with time as shown in (G).Such an operation is repeated,
Eventually, when the time that the signal e is at the H level becomes longer than the time that the signal f is at the H level, the current from the power supply 52 will flow through the transistors 48a and 48b6 to the coil/l/JZ3. The time becomes longer, and a current flows in the direction opposite to the arrow g in the coils n and 23 (the current in the direction of the arrow g has a negative value as shown in (g)). The current flowing as described above is detected by the circuit 51 and a current signal j is output. The signal is passed to the error amplifier 4
2, and the signal is then subjected to a known correction in a proportional solenoid circuit.As a result,
The current (average current) flowing through Koi/L'JF correctly corresponds to the control signal (also becomes 11f4).

Next, the movement of the 1J moving body and the related movement of the 9th suhoor when the 'ltt flow flows as shown above (7 coil ρ, 23 g) is shown in Figure 3. (C riddle 11 ([shi゛C, elder brother 6, mende 3 Figure 11C:>:・
The horizontal axis 1I indicates the displacement of the movable body 1 from the neutral position in the axial direction, and the vertical axis indicates the biasing force by the spring δ, 36 (the movable body 2
6. Return to neutral position - 1: Shows the power of trying to move. Also, the many diagonal solid lines indicate the electromagnetic force exerted on the movable body when the current value flowing through the coil 7A is at each value, and the broken line indicates the spring characteristics of the spring 36? show.

As mentioned above, when a current g of 6L is applied to the coil/l/'J 23, the electromagnetic force applied to the movable body by the average current value g' and the return force applied to the movable body by the barb 35 or 30 are affected. MJ Yuka moves until it fits. For example, if the above average current value is 0.2A, the force will be balanced at point p in Figure 3, so the movable body will move from the neutral position to the left -0.2 IIIm point in Figure 1. do. As a result, the swab/lz 4 is also moved by the same dimension, and the space between the boats 5 and 8 and between the Horotro and the boat 7 is opened by a value of 7 corresponding to the above-mentioned movement dimension.

If the above-mentioned average current value g' changes from this state, (1) the magnetic force also changes accordingly, so the position where the ever-changing electromagnetic force and the repelling force of the driving body are balanced. 3 along the dashed line of the splash characteristic in FIG. In this case, the referee moves to accurately follow the change in the current value g'. This is because the value of the current g flowing through the coil is constantly increasing and decreasing as shown by C and (g) in Figure S, so the moving object I is at a position determined by the above average current value g'. There is a constant slight vibration in Zenchu/B. Therefore, when the above-mentioned current iri g' changes and the movable body I and spool 4 move, are they? It can move without being caught by frictional force against the supporting member, and can move by 10 degrees while following changes in the current value g'.

As described above, in this invention, the movable body can be selectively moved to one side or the other by changing the polarity of energization to the coil, and the movement dimension is set in proportion to the current value. There are special tricks you can do.

[Brief explanation of the drawing]

The drawings show an example of this rAJ. Figure 1 is the solenoid valve for Sani 1 Norr, and 21a is the one for the country-Ib.
AWr side view, Figure 3 is a characteristic diagram, Figure 3 is a block diagram of the control circuit, and Figure S is a time chart. 11...Body, n, 23...Suiru,
Ah...movable body, ah, 36. River...splash. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] The main unit is equipped with a coil, a movable body that moves forward and backward by -C when the coil is energized, and a spring that returns the movable body to a neutral position. A solenoid characterized in that the movable body moves from a neutral position to one side or the other depending on the difference in polarity, and the movement dimension is proportional to the value of the current flowing through the coil.