JPH0571323A - Variable cylinder system - Google Patents

Abstract

PURPOSE:To thin the interval of the lifter body and lighten the lifter body by providing a piece inside the lifter body, and forming the first through hole inside the piece, and forming the second through hole inside the lifter body, and according each through hole, and inserting a valve. CONSTITUTION:An oil port 1 is made at the side of the lifter body 10. A drain port 9 and the second through hole 5 are provided inside the lifter body 10. For a piece 2, a piece support 7 is installed so that the piece may operate rotatably, and it is fixed by the second pin 6. Moreover, for the piece support 7, a supporting groove 19 is made to support the second spring 18. For the piece pivoted rotatably by the first pin 3, support space 20 is made to support the second spring pin 18 when rotating. At cylinder reductive operation, the piece 2 is made free of rotation by hydraulic pressure, and the axis of a valve 14 is accorded with the first through hole 4 and the second through hole 5, whereby the valve is closed. At full cylinder operation, the piece 2 is returned to its place by the energizing force of the second spring 18, and the valve 14 opens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable cylinder system which can be used for a variable cylinder engine which can be used for a variable cylinder of a direct type engine.

[0002]

2. Description of the Related Art As a conventional technique of this kind, there is, for example, Japanese Utility Model Laid-Open No. 62-152008, but in a hydraulic lifter, a groove communicating with an oil passage is provided in a block, and an outer peripheral groove that constantly overlaps with the groove is body-shaped. By providing it on the outer circumference of, the oil pressure is transmitted to the plunger through the groove and the outer peripheral groove that overlap so that the passage area does not change from the oil passage during the reduced cylinder operation, and overcomes the biasing force of the spring to slide the plunger. Align the valve stem clearance hole with the valve stem axis. In this case, since the plunger does not change in passage area, it slides smoothly, and a stable reduced cylinder operation state is achieved.

[0003]

However, in the above-mentioned prior art, it is necessary to make a large distance between the upper end of the body and the plunger, which causes problems in terms of weight and performance.
Further, when pressure is applied by the valve stem, the outer peripheral contact portion of the plunger with the body comes into contact with the line, and the plunger is overloaded. Furthermore, if the total length of the body is shortened to reduce the weight, it is difficult to align the oil passage and the groove when sliding, and the cam may come into contact with the block. Must be taken for a long time.

Therefore, in the present invention, it is a technical subject to make the surface contact between the valve and the lifter body of the variable cylinder system effective and to reduce the weight of the variable cylinder system.

[0005]

[Constitution of the invention]

[0006]

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problems of the present invention are such that a lifter body having a cylindrical shape and an upper surface of the lifter body are brought into contact with each other. So arranged, a lifter bore slidably fitted in the lifter body, a valve slidably disposed in the lifter body, a first spring mounted in the lifter bore, and An oil passage that is an oil supply passage that penetrates the lifter bore, an oil hole that is formed in the lifter body, an oil chamber that is in communication with the oil hole and that is provided in the lifter body, and that is provided in the lifter body. In a variable cylinder system having a drain hole, a top is fitted in the lifter body so as to be rotatable around a first pin, and a circular first through hole is formed in the top and provided in the lifter body. Second through hole , A top pin is locked in the lifter body, the second pin holding the top support and the top and the top support are connected by a second spring to operate the top. It is a thing.

A second technical means of the present invention, which has been taken to solve the above-mentioned technical problem of the present invention, is arranged so as to abut on a lifter body having a cylindrical shape and an upper surface of the lifter body. A cam, a lifter bore slidably fitted in the lifter body, a valve slidably arranged in the lifter body, a first spring mounted in the lifter bore, and a penetrating through the lifter bore. An oil passage serving as an oil supply passage, and an oil hole formed in the lifter body,
In a variable cylinder system having an oil chamber provided in the lifter main body and communicating with the oil hole, and a drain hole provided in the lifter main body, a rotary unit is mounted so as to be rotatable in the lifter main body. A first through hole provided in a rotating portion, a second through hole provided in the lifter body, a first supporting portion rotatably formed in the lifter body, and a lifter body A second support portion rotatably formed on the
The rotating portion and the second supporting portion are connected by a second spring so that the rotating portion is rotatable.

[0008]

According to the above-mentioned technical means of the present invention, the first pin is rotatably supported and fitted in the lifter body during the cut-off cylinder operation, and the lifter body is used for the frame support. By connecting the lifter body and the top support from the second spring so that they can rotate, and aligning the first through hole of the top and the second through hole of the lifter body with the axial center of the valve. It is possible to reduce the width of the upper end of the lifter main body, and when the lifter main body slides in the lifter bore, the contact between the lifter main body and the valve end is good and stable operation is possible when the lifter main body slides in the lifter bore. Becomes

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the technical means of the present invention will be described in detail below with reference to the accompanying drawings.

1 to 3, a part of the lifter body 10 of the variable cylinder system 60 is formed. An oil hole 1 is formed on a side of the lifter body 10, an oil chamber 15 is provided, and a drain hole 9 is formed in a lower portion of the lifter body 10. A first pin 3 is mounted laterally inside the lifter body 10 and serves as a pivot. On the opposite side of the lifter body 10, a crescent-shaped frame support 7 is attached so that the frame 2 can be pivoted.
It is locked by the second pin 6. Further, the top support 7 has a support groove 19 for supporting the second spring 18.

Next, the top 2 rotatably supported by the first pin forms a supporting gap 20 for supporting the second spring 18 when rotating. Top 2 is oil chamber 15
Is provided, and the drain hole 9 is opened when rotating. See also frame 2
Has a rounded shape so that it can rotate with the top support 7.

2 to 4, a lifter body 10 is slidably fitted in a lifter bore 13 between a valve 14 and a cam 8, and an oil passage 11 is formed in the lifter bore 13 to form an oil hole 1 and an oil hole 1. A groove 11a that is always in communication is formed.
The plate 12 is attached to the bottom of the lifter body 10,
A second through hole 5 is formed in the plate 12, and is formed so as to coincide with the axis of the second through hole 5 and the valve 14.
Further, the valve 14 is provided with paper at its end for easy insertion into each through hole. In order to support the lifter body 10, a first spring 17 biasing an upward force is mounted inside the lifter bore 13.

In FIG. 5, the lifter main body 10 is composed of three parts, a first support portion 30, a second support portion 40 and a rotating portion 50, and an oil hole 1 is formed in a part of the lifter body 10. The second through hole 5 and the drain hole 9 are formed. First
The support portion 30 is processed into a fan shape. Lifter body 10
The inside has a rounded shape so that the inner surface side of the first support portion 30 and the shaft of the rotating portion 50 fit together. Rotating part 50
Has a shape formed by the oil chamber 15, and the first through hole 4
And a supporting gap 20 for supporting the second spring 18 is provided in the rotating portion 50, and a supporting groove 19 for supporting the second spring 18 is also provided in the second supporting portion 40, so that the rotating portion 50 is rotated by the urging force of the second spring 18. Let The second support portion 40 is shaped like a crescent moon, is locked by the second pin 6, and is processed into a semicircular shape so as to rotate the rotation portion 50, and the inside of the second support portion 40 is lightened. It has been scraped in order to do.

A variable cylinder system 60 having the above structure
The operation of will be described in detail below.

During the reduced-cylinder operation, the first solenoid valve (not shown) is opened and the second solenoid valve (not shown) is closed by the signal of the cylinder switching computer (not shown), and the hydraulic pressure is oil. After passing through the passage 11 and the oil hole 1, the lifter body 10 is press-fitted and transmitted to the top 2. Further, the cam 8 rotates from the state of FIG. 1 as shown in FIG. 3 to smoothly slide the lifter body 10 downward, and at the same time, the top 2 transmitted from the state of FIG. 1 by the hydraulic pressure as shown in FIG. The valve 14 is inserted by rotating the first pin 3 and further aligning the lifter body 10 with the first through hole 4 and the second through hole 5. That is, the lift of the cam 8 is not transmitted to the valve 14, and the valve 14 remains closed. As a result, a stable reduced cylinder operation state is possible.

Next, during the operation of all cylinders, the first solenoid valve is closed and the second solenoid valve is opened by the signal of the cylinder switching computer, and the oil pressure is passed from the oil passage 11 through the oil hole 1. It will not be supplied to the lifter body 10. That is, since the inflow of hydraulic pressure is controlled by the cylinder switching computer, as shown in FIG.
From the state of FIG. 2, the lifter body 10 slides smoothly up the lifter bore 13 by the first spring 17 as shown in FIG.
From the state of FIG. 3, the valve 14 is smoothly removed from the first through hole 4 and the second through hole 5 of the top 2 as shown in FIG.

At the same time when the valve 14 comes off, the top 2 is shown in FIG.
Return to the state shown in. At this time, the oil pressure during the reduced cylinder operation is the
Since the fluid leaks from the gap 5, the top 2 is smoothly rotated by discharging hydraulic pressure from the drain hole 9. Further, since the end portion of the valve 14 is coated with paper, the valve 14 can slide smoothly on the first through hole 4 and the second through hole 5 of the top 2.

By operating in the state shown in FIG. 5 instead of FIG. 1 to FIG. 3, as a result, the machining can be easier than in FIG. 1 to FIG.

[0019]

As described above, according to the present invention, the top is provided in the lifter main body, the first through hole is formed in the top, and the second through hole is formed in the lifter main body. The hydraulic pressure supplied from the oil passage is press-fitted into the lifter main body and transmitted to the top. By the hydraulic pressure, the top rotates through the first pin and the through holes can be aligned so that the valve can be inserted.
The distance between the lifter bodies becomes thin, and the weight of the lifter body can be reduced. Further, when the lifter main body slides in the lifter bore in the full cylinder, the contact surface between the top and the end of the valve is good and no load is applied.

[Brief description of drawings]

FIG. 1 shows a top view of the present invention in a full cylinder state.

FIG. 2 is a cross-sectional view of the full cylinder shown in FIG.

FIG. 3 is a top view of the present invention when a reduced cylinder is used.

FIG. 4 shows a cross-sectional view of the reduced cylinder shown in FIG.

FIG. 5 shows another embodiment of the present invention.

[Explanation of symbols]

 1 ... Oil hole 2 ... Top 3 ... First pin 4 ... First through hole 5 ... Second through hole 6 ... Second pin 7 ... Top support 8 ....・ Cam 9 ・ ・ ・ Drain hole 10 ・ ・ ・ Lifter body 11 ・ ・ ・ Oil passage 11a ・ ・ ・ Groove 13 ・ ・ ・ Lifter bore 14 ・ ・ ・ Valve 15 ・ ・ ・ Oil chamber 17 ・ ・ ・ First spring 18 ・..Second spring 19 ... Support groove 20 ... Support gap 30 ... First support portion 40 ... Second support portion 50 ... Rotating portion 60 ... Variable cylinder system

Claims (2)

[Claims] 1. A lifter body having a cylindrical shape, a cam arranged to come into contact with an upper surface of the lifter body, a lifter bore for slidably fitting the lifter body, and a slide inside the lifter body. A valve that can be disposed, a first spring that is mounted in the lifter bore, an oil passage that is an oil supply passage that penetrates the lifter bore, an oil hole that is formed in the lifter body, and the oil hole. In a variable cylinder system having an oil chamber provided in the lifter body and a drain hole provided in the lifter body in communication with the lifter body, a top is rotatably fitted in the lifter body about a first pin. And a first through hole is formed in a circular shape in the frame, and a second through hole provided in the lifter body and a frame support in the lifter body are locked and the frame support is held. The second pin and the frame Variable cylinder system, characterized in that the freely rotating the frame is coupled with said frame supporting at second spring. 2. A lifter body having a cylindrical shape, a cam arranged so as to abut on an upper surface of the lifter body, a lifter bore into which the lifter body is slidably fitted, and a slide inside the lifter body. A valve that is movably disposed, a first spring that is installed in the lifter bore, an oil passage that is an oil supply passage that penetrates the lifter bore, an oil hole that is formed in the lifter body, and the oil hole. In a variable cylinder system having an oil chamber provided in the lifter main body and a drain hole provided in the lifter main body in communication with the lifter main body, a rotary unit is rotatably mounted in the lifter main body, A first through hole provided in the moving part, a second through hole provided in the lifter body, a first support part rotatably formed in the lifter body, and a rotation hole in the lifter body. Second freely formed Variable cylinder system, wherein the lifting unit, that said rotating portion and said second supporting portions being connected by a second spring to freely pivot the pivot portion.