JPS5960615A - Mechanism for adjusting eccentric quantity and converting displacement - Google Patents

Abstract

PURPOSE:To continuously change an eccentric quantity irrespective of the stopping time and rotating time by installing an adjusting tube between an outer and inner tubes, either of which becomes the driving side or driven side and moving the adjusting tube in the axial direction. CONSTITUTION:An outer tube 1 is supported by a frame body 2 under a rotation-free condition by means of a bearing 3 and an inner tube 9 is supported in a through hole 6 eccentric from the center axis of the outer tube 1 under a rotation-free condition by means of a bearing 8. A center shaft 18 is rotatably supported in a through hole 10 eccentric from the center axis of the inner tube 8 by means of bearings 19 and 20. Either of the outer tube 1 or inner tube 9 (center shaft 18), for example the outer tube 1 becomes the driving side. Moreover, an adjusting tube 14 which can rotate freely and move in the axial direction is put between the outer tube 1 and inner tube 9 and torsional grooves 7 and 13 and tooth sections 11 and 12 which are engaged with the tubes 1, 9, and 14 so that the adjusting tube 14 is moved through a shifter 16 and the eccentric quantity is adjusted, are formed to each tube 1, 9, and 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanism that can be used for eccentricity adjustment and displacement conversion.

A generally known structure for adjusting the amount of eccentricity is the double eccentric structure, in which a hole is provided eccentrically with respect to the central axis of the outer cylinder, and an inner cylinder whose central axis is eccentric by the same amount of eccentricity is inserted into this hole. Depending on the combination, the amount of eccentricity of the central axis is usually adjusted by changing the relative angular positions of the outer cylinder and the inner cylinder.

In this case, adjustments must be made while the inner and outer cylinders are stopped. Therefore, it has been impossible to change the position of the center axis by changing the amount of eccentricity while the inner and outer cylinders are rotating, that is, during some kind of work.

The present invention has been made with two considerations in mind, and is a mechanism that can adjust the amount of eccentricity to B:M regardless of whether it is stopped or rotating, and can also perform continuous operation and convert displacement. Provided by J: The present invention is an outer cylinder.

W11 Adjustment cylinder, inner cylinder, (shaft part) are rotatable, and furthermore, only the adjustment cylinder is movable in the axial direction, with an overlapping structure, and the outer cylinder and inner cylinder are twisted in opposite directions with respect to the adjustment cylinder. The outer cylinder and cocoon phase part are in a connected relationship.

A+,) Reka Shirakawa 2 of the relationship between the a phase part and the inner cylinder, and the inner cylinder and the shaft part
The outer cylinder, the adjustment cylinder, and
Even when the inner cylinder is rotating integrally, by controlling the axial position of the adjustment cylinder, eccentricity L± can be changed continuously during rotation, and displacement can also be converted. be.

An example of the present invention will be explained below based on the drawings.

The main components of the present invention are an outer cylinder, an adjustment cylinder, an inner cylinder, and a central axis stacked one on top of the other in this order, and the configuration is differentiated as shown in FIG. 1 depending on where the two eccentric parts are provided. In other words, Fig. 1 (a) shows eccentric parts provided on the outer cylinder and inner cylinder, Fig. 1 (b) shows eccentric parts provided on the outer cylinder and adjustment cylinder, and Fig. 1 shows eccentric parts provided on the adjustment cylinder and inner cylinder. Figure (c) becomes. In the case of eccentricity, it is shown in FIG. 1 (D), and in this case, it can be used as a conversion mechanism between rotation interlock and W-line motion.

Next, an example in which the outer cylinder and the inner cylinder have eccentric portions will be explained. In the main parts diagram in Fig. 2 and the longitudinal to first view of the mechanism in Fig. 3, the outer cylinder 1 is mounted on the frame 2 by a bearing 3, and only rotates in the same direction.
A pulley 4, which is rotatably supported on a shaft and rotated at low speed by a motor (not shown) via a belt, is fixed thereto. The outer cylinder 1 is provided with a through hole 6 whose axis is eccentric by ε with respect to the central axis of the outer cylinder 1. One or more through holes 6 are formed on the inner periphery of one side with the female hole 5 in the center as the center. ! ,! Several twisted grooves 7 are carved. The twist angle is preferably 45° in consideration of the reversibility of input and output and the magnitude of displacement, but the angle can be determined freely depending on the application. An inner cylinder m9 is rotatably supported on the other side of the recess 5 of the through hole 6 via a bearing 8, and the axis of the inner cylinder 9 is 7 relative to the central axis of the through hole 6. A through hole 10 eccentric by the same amount ε as the eccentricity is bored. In addition, the inner cylinder 9 is inserted into the outer periphery of a small-diameter end forming a gap between the inner surface of the through hole B and the adjustment cylinder described below at a position corresponding to the torsional groove 7, and the direction is opposite to the torsional groove 7. One or more teeth or round pins with the same helix angle 1
1 is being held strong. Then, in the gap between the hole 6 of the part of the outer cylinder 1 having the torsion groove 7 and the outer periphery of the part of the inner cylinder 9 having the teeth 11, a hole 6 of the same torsion angle and direction that meshes with the pinch groove 7 is placed on the outer periphery. One or more teeth or round pins 12 are provided on the inner periphery of the concentrically drilled through hole, and one or more teeth or round pins 12 are provided on the inner periphery of the concentrically drilled through hole and have the same angle in the opposite direction to the twisting hole 7 that engages with the teeth 11. An adjustment cylinder 14 in which a book twist @ 16 is formed is interposed,
It is rotatably supported integrally with the inner and outer cylinders and movably in the axial direction. Therefore, the teeth on the outer periphery and the grooves on the inner periphery of the adjusting cylinder 14 have the same twist angle in opposite directions. Adjustment tube 1
A 7 flange 15 is provided at the end of the 4, and both sides of the 7 flange 15 are held by two rollers 17, 17 of a shifter 16 provided on the frame 2 for axial movement. 16, the adjustment cylinder 15 is positioned 1 in the axial direction.
9' adjusted. Outer cylinder 1 whose axial movement is regulated by this fat adjustment. The inner tube 9 is turned on one side by a double amount of wax determined by the twist angle.

The center axis 1 is located in the through hole 1o of the inner cylinder 9 which is eccentric by the same amount ε as described above.
8 is rotatably supported by bearings 19 and 20 at the center of the hole. This central shaft 18 is connected to a motor via a universal joint 21 and has a tapered portion 22 at the end of the shaft.
This is used to fit the tools, etc. needed for this purpose.

As an example of the use of a device incorporating this mechanism, it is installed vertically on an arm that can be positioned arbitrarily on orthogonal coordinates relative to a table, and an internal grindstone is fitted into the tapered portion 22 at the end of the central shaft 18. In a polishing machine, a pulley 4 has a universal joint 2 that transmits low-speed rotation that causes the grinding wheel to revolve.
1 is given a rotation speed necessary for i stone polishing.

Next, a case will be described in which a hole in a workpiece whose shape cannot be rotated about the center of the hole to be machined is internally ground.

In addition, the eccentricity ε of this device should be large enough to cover the machined hole. The shifter 16 is operated to make the eccentricity ε of Mr+ to be polished zero, and the center of the machined hole and the center of the grindstone are aligned and fixed in position.

After that, the grinding stone on the central shaft is rotated at high speed, the pulley 4 is rotated at low speed, and the shifter 16 is gradually moved to increase the eccentricity ε', so that the radius of revolution changes by ε', and the grinding wheel k) Touch the inner surface of the machined hole to start polishing. During rough polishing, the shifter 16 is moved quickly to increase the amount of eccentricity and perform rough cutting.

When the hole diameter is close to a predetermined size, the shifter 16 is moved slowly and minutely to perform final polishing, and the shifter 16 is stopped moving at the predetermined size to make the depth of cut zero and spark out. Thereafter, the shifter 16 is rapidly moved in the opposite direction to reduce the eccentricity ε' to zero, thereby completing the machining.

As another example of the use of this device, a polishing surface plate whose bottom surface perpendicular to the shaft has a polishing surface large enough to cover the entire surface to be polished is attached instead of the IDT grindstone. On the other hand, as an example of a workpiece, a valve body or a valve seat is fixed horizontally on a table with the surface to be polished as the upper surface, and the lapping material is allowed to flow into the upper surface. Adjustment m14 is performed by moving in the d1h direction to adjust the eccentricity t)ε'
is made larger, the arm is lowered while rotating the outer cylinder 1 and the central shaft 18 at a predetermined speed that is not fast, and the polishing surface plate and the surface to be polished are brought into contact with each other under a predetermined pressure, usually about their own weight, to perform lapping. As the lapping progresses, the adjusting cylinder 14 is moved A1 to gradually reduce the eccentricity ε', and if necessary, the particle size of the lapping material is made finer or the supply is stopped to complete the lapping of the surface to be polished. In this way, by gradually decreasing the eccentricity ε' during wrapping, a reasonable finish can be obtained with the lapping material, and extremely high flatness can be obtained.
Note that it is also possible to rotate the table in the opposite direction to the direction of rotation of the outer cylinder 1 if necessary. Further, it is more preferable to transmit only rotational force to the polishing surface plate and press it with its own weight so that the angle between the surface to be polished and the axis of the apparatus is not affected. Although the explanation has been made regarding polishing using a grindstone and a polishing surface plate, the tools can be changed freely and applied to various types of processing. In this example, the eccentric part is equal to the outer and inner cylinders. y
It is easy to make an adjustment tube with a girder. If a helical gear is used instead of a helical gear, it will be easier to manufacture by gear cutting, and the force will be equally distributed over the entire circumference, improving operability.

Furthermore, if you change to a pole screw, smoother operation of forward and reverse rotation will be possible. Further, the twist angle is not limited to 45°, and by selecting the twist angle, a slight displacement or an enlarged displacement can be obtained.

Next, apply this device to the stroke of a reciprocating pump, etc.
An example of application used in 7J・Raku will be explained based on FIG. 4.

Center axis 51 is iN! The motor 5 is rotatably supported on the machine base via supports 52 and 53, and is connected to the motor 5 via a camp ring 54.
5, and the outer cylinder 56 is rotatably connected to an end of a connecting rod 60 pivotally connected to a piston 59 of a reciprocating pump 58 via a bearing 57 instead of a pulley. In addition, the shifter 62 for moving the adjustment cylinder 61 is moved to the position 1r:j.
It is controlled by I-j6. motor 5
When the rotating shaft 51 is rotated by 5, the shifter 61 position t
(The first cylinder 56 cranks at 2ε', which is twice the eccentricity ε' determined by J, and the connecting rod 60
As a result, the piston 59 pumps out the liquid with a stroke of 2ε'. When the position of the shifter 62 is sequentially moved by the positioning device 66, the adjustment cylinder 61 is moved in the axial direction, and the stroke is changed as the eccentricity ε' changes, so that the discharge amount can be changed continuously without stopping the operation. #1
The pressure or flow rate on the discharge side of the reciprocating pump 58 is controlled by adjusting the pressure or flow rate on the discharge side of the reciprocating pump 58, and the shifter 62 automatically changes the position of the adjustment cylinder 61 to maintain a predetermined discharge pressure and flow rate. You can control the discharge amount.

Furthermore, when increasing the pressure on the discharge side, by controlling the adjustment cylinder 61 so that the stroke of the piston is initially large and the stroke becomes smaller as the pressure increases nears the end, it is possible to increase the pressure at the same horsepower and reduce the power consumption and drive device. It can be done economically.

As described above, the present invention interposes an adjusting cylinder between an outer cylinder that is a driving side or a driven side and an inner cylinder that has a central axis that is a driven side or a driving side, and the adjusting cylinders are mutually connected. The outer cylinder and inner cylinder are connected by helical gears in opposite directions, and two of the stacked six rings are fitted with the same 14 eccentrically, so when the outer cylinder and inner cylinder are rotating. Also, the amount of eccentricity can be freely and continuously changed simply by moving the adjustment cylinder in the axial direction. Then, a) by rotating the outer cylinder or the inner cylinder at a fixed position and moving the adjustment cylinder in the axial direction, the inner cylinder or the outer surface can be rotated.

b. When the outer cylinder or the inner cylinder is fixed and the inner cylinder or the outer cylinder is rotated, the adjustment cylinder can be moved linearly in the axial direction.

For this reason, we decided on the eccentric part 1 of each machine or tool, and changed the eccentricity of planetary interlocking equipment, adjusted the eccentricity H of stirring machines, polishing machines, and stationary motors, and adjusted the capacity of reciprocating pumps by two rotations. It has a wide range of uses such as converting linear motion. Further, since equal and opposite torsion surfaces are provided on the inside and outside of the adjustment cylinder to transmit force, the forces are balanced and the adjustment cylinder can be controlled smoothly.

In addition, compared to the conventional double eccentric mechanism, the main parts are one
It is extremely simple as it only requires one adjustment cylinder, and the phase adjustment part does not rotate relative to the outer cylinder or inner cylinder during rotation except during training, so it has great features such as no wear or power loss. be.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the combination of eccentric parts of the main parts, Fig. 2 is a perspective view of the main parts, Fig. 3 is a vertical sectional view of the mechanism of the present invention, and Fig. 4 is an explanatory diagram of the application of the mechanism. . 1... Outer cylinder, 7, 13... Twisted groove, 9
...Inner cylinder, 11.12...Twisted teeth, 14...Adjustment cylinder, 1st...Central shaft, Patent applicant: Dai Ito Kura

Claims (1)

[Claims] (1) An outer cylinder that is a driving side or a driven side that has one or more first torsion grooves on the inner surface of a hole in the axial direction and is rotatably supported, and an outer cylinder that is inserted into the hole of the outer cylinder. has a first tooth portion that meshes with the first torsion groove, and one or more second torsion grooves having the same torsion angle in the opposite direction to the direction of the first torsion groove on the inner surface of the hole in the axial direction. an adjustment cylinder which is supported so as to be rotatable and movable in the axial direction; and a second toothed portion which is inserted into the hole of the W~shape and engages with the second torsion groove on the outer surface, and which is supported so as to be only rotatable. The inner cylinder is inserted in the axial direction of the inner cylinder.
77 or an identified shaft part, and any two of the hole in the outer cylinder, the hole in the adjustment cylinder, and the shaft part in the inner cylinder are provided eccentrically by the same amount, and the adjustment cylinder is moved in the axial direction. What is claimed is: 1. An eccentricity adjusting and displacement converting mechanism, characterized in that the eccentricity can be adjusted by adjusting the eccentricity, and the displacement can be changed by fixing or rotating the outer cylinder and the inner cylinder, or by moving the adjusting cylinder in the axial direction.