JPS597601Y2 - Flow rate adjustment valve with built-in rotary switching valve - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a flow regulating valve with a built-in rotary switching valve, which is a combination of a deceleration valve, a check valve, and a pressure compensating flow regulating valve.

In such conventional valves, firstly, whether the rotary switching valve corresponding to the deceleration valve is a type that operates vertically or a type that rotates, it has a slide valve that performs switching, a part that protrudes outside the main body, and 1. The body hole was directly sealed with a slide valve.

Therefore, since the main body and the slide valve slide each time they move up and down or rotate, there is a problem that chips and dirt can get caught in the gaps between these sliding surfaces, or cutting oil can get in. Furthermore, this surface can wear out. There was also a risk that oil would easily leak.

Second, in conventional valves, the outer cylindrical surface fits into the main body hole, and in the case of vertical movement, a tapered surface or groove, and in the case of rotation, a U-shaped oil passage inside the slide valve connects the inlet port and outlet. Communication with the port was closed, and a seal was created between the body hole and the cylindrical surface.

Therefore, unless there is a large play gap, the valve will not operate smoothly and there will be a lot of internal leakage, and this problem will become worse due to wear due to use, resulting in a reduction in valve performance.

The present invention eliminates the drawbacks of the conventional products, eliminates chips, dirt, oil, etc. from getting caught in the gap between the main body and the slide valve, and eliminates abrasion. The purpose of the present invention is to provide a high-performance flow regulating valve with a built-in rotary switching valve that is free from wear and internal leakage.

Hereinafter, an embodiment of the present invention will be described based on the drawings. The flow rate regulating valve with a built-in rotary switching valve includes a main body 1, an inlet port 35, an outlet port 36, which are respectively installed in the main body.
Oil passage 19 communicating between inlet port 35 and outlet port 36
, 20, the oil passage 19, which is interposed between the oil passages 19, 20;
There is a rapid feed system consisting of a rotary switching valve 37 that performs communication/closing of 20.

Next, the inlet port 35, oil passage 19, and oil passage 1 are also built-in.
The oil chamber 9 and the oil passage 23 of the check valve 10 that checks the pressure oil from 9
, pressure compensator 7, oil passage 25, flow rate adjustment valve 38,
It communicates with the oil passages 31 and 32 sequentially, and the oil passages 21 and 2
There is a slow feed system that communicates with the outlet port 36 through the outlet port 36, and the oil passage 20 and the throttle valve 1 from the outlet port 36.
2. The oil passage 22 and the check valve 10 are opened, and there is a slow return feed system which communicates with the oil chamber 9 and the oil passage 19 through the inlet port 35, respectively, and the above three systems are incorporated into the main body 1. , some of the oil passages 19 and 20 are shared.

The throttle valve 12 may be omitted from the circuit.

Of the above three systems, the slow feed system can flow in the reverse direction, and the return slow feed system also does not flow in the reverse direction due to the check valve 10.

A fast forward system can flow in the opposite direction.

The rotary switching valve 37 has a U-shaped notch 29 that protrudes outside the main body 1.
The rotor 6 has a rotor 6, a slide valve 4 fixed to the rotor 6, an upper cover 2, a spring 16 that biases between the upper cover 2 and the slide valve 4, and a lower cover 3.

The upper cover 2 has a slide valve 4 at one end of a hole 39 passing through the main body.
The upper part is rotatably supported, and the top side periphery 33 is fitted into the recess 34 of the rotor 6, thereby sealing the space between the main body 1 and the upper part of the slide valve 4.

The lower lid 3 seals the other end of the hole 39 passing through the main body, and has fixed oil passages 26 and 27 that open at one end at the top 41 and communicate with the outlet port 36 at the other end, as shown in FIG. ing.

The lower end surface 42 of the slide valve 4 and the top portion 41 of the lower lid 3 are sealed by a surface.

The slide valve 4 has a U-shaped groove, which is an oil passage 28, and is in constant communication with the inlet port 35.

The other end of the U-shaped groove-shaped oil passage 28 is open to the lower end surface 42 and can communicate with the oil passage 26 opening at the top 41 of the lower lid 3 when the slide valve 4 is rotated.

The slide valve 4 is provided with a pressure receiving surface 5 and receives the pressure of pressure oil from an oil passage 19.

Next, to explain the operating state, the rotor 6 is shown in FIG.
It is initially set at position A in FIG.

In this position, the oil passages 28 and 26 are in communication, so that the artificial port 35 and the outlet port 36 are communicated with each other through the oil passage 19 and the oil passages 27 and 20, respectively.

In FIG. 2, when the solenoid valve 43 is activated and the solenoid a is energized, the valve position moves to the left and the cylinder 18 moves leftward at a rapid traverse speed.

Then, at a certain point, as shown in FIG. 1, the pin 17 of the slide 44 contacts the U-shaped notch 29 at the A position, and rotates the rotor 6 and thus the slide valve 4 counterclockwise to the B position.

For this reason, as shown in FIG. 7, the communication between the oil passages 28 and 26, and by extension the communication between the oil passages 19 and 20, is cut off.

Therefore, the pressure oil in the oil passage 19 is transferred to the check valve 1 as shown in FIG.
0, the oil does not enter the oil passage 22, and the oil passage 2 flows from the oil chamber 9.
3, passes through the orifice 24 of the pressure compensator 7 from the oil passage 25, passes through the orifice 30 formed by the sleeve 14 and spool 13 of the flow rate adjustment valve 38 shown in FIG. Oil passage 20 via oil passage 21
The outlet port 36 communicates with the outlet port 36 .

In other words, it flows to the slow feed system.

The flow rate flowing into the slow feed system can be set to an arbitrary amount by rotating the knob 15 of the flow rate regulating valve 38 and changing the size of the orifice 30.

Therefore, the cylinder 18 can perform necessary slow feeds such as cutting feeds.

Next, when the solenoid a of the electromagnetic valve 43 is de-energized and the solenoid b is energized, the cylinder 18 returns.

Pressure oil enters from the outlet port 36, passes through the oil passage 20, is throttled by the throttle valve 12 as shown in FIG. population port 3
Appears on 5th.

In other words, there will be one return transport.

Although the throttle valve 12 is a fixed type, it may be a variable throttle valve.

As the cylinder 18 returns to the right, the pin 17
Enter the U-shaped notch in the rotor 6 at position B in the figure and rotate the rotor 6 clockwise to the original position A.

Therefore, the oil passages 28 and 26 communicate with each other as shown in FIG. 6, and the pressure oil from the outlet port 36 is not restricted and flows through the oil passages 20 and
27, 26, 28, 19 and so on, population port 3
5, the cylinder 18 returns quickly.

In the present invention, as shown in FIG. 5, the oil passage 28 is switched by the rotation of the slide valve 4 by making a face seal with the top 41 of the lower cover 3 not on the cylindrical side but on the lower end face 42, so that the pressure in the oil passage 19 is It rests on surface 5 and is pressed by this and spring 16 to form a complete seal and almost eliminate internal leakage.
Furthermore, even if the surface wears out, compensation is automatically compensated for, so internal leaks do not increase and stable switching valve function can be achieved over a long period of time.

Furthermore, since the upper cover 2 is fixed to the main body 1 and the top side periphery 33 is fitted into the recess 34 of the rotor 6, there is no problem of notches, dirt being swallowed, or cutting oil entering, and furthermore, this surface is No more wear or oil leaks.

As shown in FIGS. 2 and 8, if the upper cover 2 is provided with a tapered shoulder 45 that continues to the top side periphery 33, chips, dirt, and oil will fall to the main body under their own weight, further eliminating the above-mentioned problems. Further, as shown in FIGS. 8 and 9, a dust seal 4 is formed between the inner periphery of the recess 34 of the rotor 6 and the top side periphery 33 of the upper cover 2.
6, the seal was even more complete and the above-mentioned problems were eliminated.

[Brief explanation of drawings]

Fig. 1 is a top view of an embodiment of the present invention, and Fig. 2 is an I of Fig. 1.
Sectional view along line I-II and hydraulic circuit diagram, 3rd
The figure is a sectional view taken along the line III-III in Fig. 1, Fig. 4 is a sectional view taken along the line IV-IV in Fig. 2, and Fig. 5 is a sectional view taken along the line IV-IV in Fig. 2.
6 and 7 are partially enlarged sectional views taken along line VI-VI in FIG.
The figure is a partial sectional view of the vicinity of the top cover of another embodiment, and FIG. 9 is a sectional view similar to FIG. 8 of still another embodiment. 1...Main body, 2...Top lid, 3...
・・Bottom cover, 4・・Slide valve, 5・・・・
Pressure receiving surface, 6...Rotor, 7...Pressure compensator, 9...Oil chamber, 10...
Check valve, 16... Spring, 19, 20,
21, 22, 23, 25, 26, 27, 2
8, 31, 32...Oil road, 29...
・U-shaped notch, 33...Top side circumference, 34...
... recess, 35... inlet port, 37...
...Rotary switching valve, 38...Flow rate adjustment valve, 39
...... Hole penetrating the main body, 41 ... Top of the lower lid, 42 ... Lower end surface of the slide valve, 45.
...Shoulder, 46...Dust seal, A,
B...Position of U-shaped notch.

Claims (1)

[Scope of claims for utility model registration] 1. The main body, the artificial port installed in the main body,
an outlet port, an oil passage that communicates the inlet port and the outlet port, a rotary switching valve that is interposed between the oil passages and closes the communication of the oil passage;
The oil passage communicates with the inlet port and the outlet port through the oil chamber of the check valve which checks the pressure oil in the oil passage from the inlet port, the pressure compensator, and the flow rate adjustment valve in sequence, and the check valve from the outlet port. In a flow regulating valve with a built-in rotary switching valve, the rotary switching valve consists of a rotor with a U-shaped notch protruding outside the main body, and a slide valve fixed to the rotor. and an upper cover which rotatably supports the upper part of the slide valve at one end of the hole penetrating the main body and which fits into the side periphery of the top and the recess of the rotor to seal between the main body and the upper part of the slide valve, and between the slide valve and the upper cover. It consists of a biasing spring, and a lower cover that slides into contact with the lower end face and top of the slide valve and seals the other end of the hole that passes through the main body.The lower cover has one end opened at the top and the other end communicated with the outlet port. The slide valve has a fixed oil passage, and the slide valve has an oil passage that is always in communication with the inlet port and the other end is open on the lower end surface and can communicate with the oil passage that opens on the top surface of the lower cover when the slide valve is rotated. 1. A flow rate regulating valve with a built-in rotary switching valve, characterized in that the valve has a pressure receiving surface that receives the pressure of pressure oil in an oil passage from an inlet port. 2. A flow rate regulating valve with a built-in rotary switching valve according to claim 1, wherein a dust seal is interposed between the inner periphery of the concave portion of the rotor and the side periphery of the top portion of the upper lid. 3. The flow rate regulating valve with a built-in rotary switching valve according to claim 1, wherein the upper cover is provided with a tapered shoulder portion that extends around the top side.