JPH06323103A - Rotary transmission mechanism - Google Patents

Abstract

PURPOSE:To drive a rotor of a rotary pump, transmit rotation of a rotor of a rotary engine to a first shaft as constant velocity rotation, and adopt the rotation to a quick return mechanism of a machine tool by transmitting the rotation of the first shaft which is constantly rotated to coaxial second and third shafts as non-constant velocity rotation. CONSTITUTION:A rotatable first shaft 1 is provided. A rotatable pipe-like second shaft 3 is arranged parallelly to the first shaft 1. A third shaft 11 is rotatably inserted into the second shaft 3. Both ends of a first link 5 are rotatably connected to one end of a rotational body 2 whose center portion is fixed to the first shaft 1 and to an end of a first arm 6 fixed to the first shaft 1. Both ends of a second link 13 are rotatably connected to the other end of the rotational body 2, and to an end of a second arm 12 fixed to an end of the third shaft 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation transmission mechanism used as a quick return mechanism for a pump, a prime mover, a machine tool, and various other machines.

[0002]

2. Description of the Related Art Various types of rotary pumps or rotary engines are conventionally known.

For example, a concentric main rotating shaft is provided in a cylindrical housing, a constant speed rotating rotor and a non-constant speed rotating rotor are provided on the outside thereof, and a tongue-shaped piston is provided on the outer periphery of these rotors to rotate at a constant speed together with the main shaft. The volume between the constant-velocity rotating piston and the non-constant-speed rotating piston is changed by rotating the rotor at a constant speed and rotating the unequal-speed rotating rotor at a non-constant-speed rotation by the Genebus top mechanism driven by the rotation of the main shaft. is there.

Further, a rotor having a narrow width and a mountain shape at both ends is fitted into a rotary housing having a deformed cylindrical shape, and both ends of the rotor are eccentrically rotated while being in contact with the inner surface of the housing. Some change the volume of space.

Further, a quick return mechanism and a hydraulic cylinder mechanism used for a saver and the like are known as a quick return mechanism of a working mechanism.

[0006]

Among the above-mentioned prior arts, in the case where the Geneva top is used to drive the non-uniform speed rotor by the main shaft that rotates at a constant speed, the Geneva top mechanism has a constant speed. Since the pin of the moving vehicle is engaged and disengaged with the groove of the driven vehicle that rotates at a non-constant speed, there is a risk of breakdown such as cutting of the pin, and vibration and noise may occur.

Further, in a rotary housing having a deformed cylindrical shape, which eccentrically rotates the rotor, a pin for eccentric rotation is fitted in a long hole provided in the rotor, and therefore the pin slides in the long hole of the rotor. When rotating while rotating, there is a problem that wear is large and a failure may occur, and noise is increased.

Further, the conventional quick re-turn mechanism of a machine tool requires a large disk and a swing arm, so that it is upsized, and those using hydraulic pressure require complicated hydraulic circuits and control circuits.

An object of the present invention is to solve the problems of the above-mentioned various conventional mechanisms and to use a simple link mechanism to rotate a rotor at a non-constant speed or to operate a quick return mechanism of a machine tool. Is to provide a rotation transmission mechanism.

[0010]

In order to solve the above-mentioned problems, the present invention is directed to a rotatable first shaft and a rotatable tubular second shaft parallel to the first shaft at a predetermined distance. When,
One end of a rotating body having a third shaft rotatably inserted in the second shaft and having an intermediate portion fixed to the first shaft; and the first shaft.
Both ends of the first link are rotatably connected to the end of the first arm fixed to the shaft, and the other end of the rotating body and the end of the second arm fixed to the end of the third shaft are connected. A structure in which both ends of the second link are rotatably connected is adopted. Also, the first
A structure in which the distance between the shaft and the second and third shafts is variable, or a pair of rotors having fan-shaped pistons are concentrically and rotatably fitted in a hollow circular cylinder. The same as the above, the space volume between the pistons of the rotors is changed by the non-uniform speed rotation, and the fluid sucked from the suction port of the cylinder is discharged from the discharge port. A transmission mechanism in which the second shaft and the third shaft are fixed so that the transmission mechanism can be used in a pump or a prime mover is also adopted.

[0011]

In the above structure, when the first shaft rotates at the same speed together with the rotating body, the first link and the second link move to the second arm via the first arm and the second arm of the second shaft and the third shaft.
Rotate the shaft and the third shaft at unequal speed.

When the second shaft and the third shaft rotate at non-constant speeds as described above, the fan-shaped pistons connected to these shafts rotate at non-constant speeds in the cylinder to change the volume of the space between the pistons. Let

Therefore, when it is used in a pump, by using the first shaft as a drive shaft, a fluid such as a liquid or gas is sucked from the suction port in the process of increasing the space volume between the fan-shaped pistons, and the volume is increased. In the decreasing process, the sucked fluid is discharged from the discharge port.

When used as an internal combustion engine, the first shaft serves as the output shaft. That is, for example, a mixed gas of gasoline and air is sucked into the intake port of the cylinder, and the space is reduced and the mixed gas is compressed by the rotation of the piston. If the ignition plug is ignited when the mixed gas is sufficiently compressed in this way, the space between the pistons is rapidly expanded due to the pressure of the burned gas, and this becomes a rotational force and the first force via the link mechanism. It is transmitted to the 1st axis and rotates the 1st axis at a constant speed. In addition to that, the desired fast return mechanism of the working mechanism can be operated by the second shaft and the third shaft which rotate at a non-uniform speed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, in which A is a rotation transmission mechanism and B is a fluid suction / discharge device. In the rotation transmission mechanism A, 1 is a first shaft that rotates at a constant speed, and the first shaft 1 is fixed to the center of the rotating body 2.

Reference numeral 3 denotes a tubular second shaft provided in parallel to the side of the first shaft 1, and the second shaft 3 converts the constant speed rotation of the first shaft 1 into a non-constant speed rotation. One end of the first link 5 is rotatably connected to one end of the rotating body 2 by a pin 4,
The end of the first arm 6 fixed to the shaft 3 and the first link 5
The other end is rotatably connected by a pin 7.

The second link 13 is rotatably fitted in the second shaft 3 and fixed to the tip of the third shaft 11 protruding from the tip of the second shaft 3, and the second arm 12 is fixed to the end of the second arm 13.
One end of the link 13 is rotatably connected by a pin 14, and the other end of the link 13 is rotatably connected by a pin 15 to the other end of the rotating body 2.

In the fluid intake / exhaust device B, reference numeral 21 is a hollow circular cylinder having a cylindrical peripheral wall and front and rear walls, inside which a pair of fan-shaped pistons 22, 2 as shown in FIGS.
Insert 3.

The piston 22 is provided integrally with a rotor 24 fixed to the second shaft 3, and the piston 23 is provided integrally with a rotor 25 fixed to the third shaft 11.

As shown in FIGS. 1 and 3, the rotors 24 and 25 are provided on opposite sides with half the thickness of the pistons 22 and 23, and when the rotors 24 and 25 are stacked, the inner width of the cylinder 21 matches. It becomes the thickness.

Although not shown, the piston 2
Appropriate seals are provided between both sides and outer circumferences of 2, 23 and the inner surface of the cylinder 21 to prevent fluid leakage.

Further, a suction port 26 and a discharge port 27 are provided at appropriate places on the peripheral wall of the cylinder 21.

In the above structure, the rotating body 2 at the position shown in FIG. 4 (I) is moved to the left about the first shaft 1 as indicated by the arrow 90.
When the second shaft 3 rotates to the position shown in FIG. 4 (II) by a rotation of °, the second shaft 3 rotates to the left more than the third shaft 11, and when the first shaft 1 further rotates 90 ° to the position shown in FIG. 4 (III), The rotation angle of the second shaft 3 is further increased, but during this period, the rotation angle of the third shaft 11 is small, so that the space a between the pistons 22 and 23 is further expanded and the space b is contracted. The fluid is sucked into a and the fluid in the space b is discharged from the discharge port 27.

The first shaft 1 is rotated further 90 ° to the left, and FIG.
While the position of (IV) is reached, the rotation of the third shaft 11 is accelerated and the rotation of the second shaft 3 is delayed, so that the space a starts to shrink and comes to the portion of the discharge port 27. As the fluid begins to be discharged from the discharge port 27, the fluid from the suction port 26 is sucked into the space b that has reached the portion of the suction port 26.

Thus, the pistons 22 and 23 associated with the non-constant speed rotation of the second shaft 3 and the third shaft 11 associated with the constant speed rotation of the first shaft 1
The non-constant speed rotation of the pistons expands and contracts the space in front of and behind the pistons 22 and 23, so that a pump action is performed by suctioning and discharging the fluid.

When this is used as an internal combustion engine, two fan-shaped pistons 22 and 23 are integrally provided on the outer circumferences of the rotors 24 and 25, respectively, as shown in FIGS. In this case, a speed reducer C is provided between the rotation transmission mechanism A and the fluid suction / exhaust device B, and the rotation of the rotation shafts inside and outside the rotation transmission mechanism A is set to one half rotation through the gears 30 and 31, respectively, and the second rotation is performed. 3 and the third shaft 11 are driven. With the above configuration, suction and discharge can be performed every time the shafts 3 and 11 make a half rotation.

That is, in FIG. 8, the ignition plug 28 is provided with I as an exhaust zone, J as an intake zone, K as a compression explosion zone, and H as an expansion zone. Now both pistons 2
When 2 and 23 are rotated clockwise toward FIG. 8, FIG.
Corresponds to the top dead center in the reciprocating engine and is the state at the end of the compression stroke.

At this time, the exhaust is completed in the I zone immediately before the intake stroke is started, and the intake is completed in the J zone.
Immediately before entering the compression process, compression is completed in the K zone immediately before ignition by the ignition plug 28, and in the H zone, the expansion process is completed immediately before the exhaust process is entered.

FIG. 8 (II) shows the piston 2 from FIG. 8 (I).
In the state where 2 and 23 are slightly rotated to the right, at this time, the exhaust port 27 is closed and the intake port 26 is opened in the I zone to start intake, the compression stroke is started in the J zone, and the K zone is filled with the ignited mixed gas. The expansion stroke by combustion starts, and in the H zone, the intake port 26 starts to open and the intake stroke starts.

Incidentally, FIG. 8 (III) shows each piston 22, 2
The intermediate position of 3 is shown. As described above, in this embodiment, the pistons 22 and 23 complete one cycle every half rotation, and the first shaft 1 is rotated once as an output shaft.

Further, in FIG. 6, the first shaft 1 and the pinion 3 are connected via a link mechanism provided on the rotating body 2 at the end of the first shaft 1.
By moving the inter-axis distance of the intermediate shaft 29 as the 0 axis in parallel to the rotation direction, the gap between both pistons can be changed, and a variable compression ratio can be obtained.

In order to use the above-mentioned rotation transmission mechanism for operating each member of the machine tool, if the interlocking mechanism for driving a required part of the machine tool is connected to the second shaft 3 or the third shaft 11 of FIG. 1, the shaft 3, 11
It is possible to drive the quick return mechanism of the required portion by the non-uniform speed rotation.

[0033]

As described above, according to the present invention, the constant speed rotation of the first shaft is changed to the non-uniform speed rotation by the simple link mechanism as described above.
Since it is transmitted to the shaft, it can be used as a rotary pump or rotary engine. Also, since the rotation angle of the rotor can be made variable, it is easy to adjust the discharge amount in the case of a pump and the output by adjusting the compression ratio in the case of an engine. Available.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional side view of an embodiment.

FIG. 2 is a vertical sectional front view of an embodiment of a fluid suction / discharge device.

FIG. 3 is an exploded perspective view of the above rotor.

FIG. 4 is a front view illustrating the operation of the rotation transmission mechanism.

FIG. 5 is a vertical sectional front view of another embodiment of the fluid suction / discharge device.

FIG. 6 is a transverse plan view of the same as above.

FIG. 7 is an exploded perspective view of the above rotor.

8 is a vertical cross-sectional front view for explaining the operation of the fluid suction / discharge device shown in FIG.

[Explanation of symbols]

 1 1st axis 2 Rotating body 3 2nd axis 5 1st link 6 1st arm 11 3rd axis 12 2nd arm 13 2nd link 21 Cylinder 22 Fan-shaped piston 23 Fan-shaped piston 24 Rotor 25 Rotor 26 Suction port 27 Discharge port 28 Spark plug 29 Intermediate shaft

Claims (3)

[Claims] 1. A rotatable first shaft, a rotatable tubular second shaft parallel to the first shaft at a predetermined distance, and a third shaft rotatably inserted in the second shaft. And an end of a first arm fixed to the first shaft and an end of a first arm fixed to the first shaft, and both ends of the first link are rotatably connected to each other, and A rotation transmission mechanism in which both ends of the second link are rotatably connected to the other end of the body and the end of the second arm fixed to the end of the third shaft. 2. The rotation transmission mechanism according to claim 1, wherein a relational interval between the first shaft, the second shaft and the third shaft is variable. 3. A pair of rotors each having a fan-shaped piston are concentrically and rotatably fitted in a hollow circular cylinder, and the space volume between the pistons of the rotors is the same as above due to the non-uniform rotation of the rotors. In the fluid suction / exhaust device in which the fluid sucked from the suction port of the cylinder is discharged from the discharge port, the second shaft and the third shaft of the rotation transmission mechanism are respectively attached to the rotation shaft cores of the rotors. The rotation transmission mechanism according to claim 1, which is fixed.