JPH08189301A - Oscillating motor - Google Patents

Abstract

PURPOSE: To reduce leakage of an oscillating motor and to constitute it simple. CONSTITUTION: A cylindrical body is shaped in a cylinder sealing both ends of a cylinder body 2 with a cover body and installing a moving vane 5 of a macromolecule resin elastic body and a fixed vane 6 fitled with a packing 6a is built inside of the cylindrical body 1, the moving vane 5 is fit on a rotational output shaft 4, and made pressure contact with the cylinder body 2 and with the cover body and the packing 6a installed on the fixed vane 6 are made pressure contact with the moving vane 5. Additionally, both ends of the rotational output shaft 4 are inserted into a central hole of the cover body, at least one end of them is connected to a load as the rotational output shaft 4, the load is rotated as a pressure fluid is added to one of fluid pressure ports of the cylinder body 2 and the pressure fluid is discharged from the other, and when pressurization and discharge of the pressure fluid becomes reversal, the load is rotated in the reversal direction and changes its pressurizing and discharging direction, and accordingly it is possible to oscillate the load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing motor,
In particular, the present invention relates to a swing motor having a simple structure, a small size, and a small internal leak.

[0002]

2. Description of the Related Art Oscillation motors are used in general industrial machines with a pressurized fluid as an energy source and are widely used for reversing devices, rotating objects, clamping objects, etc.
As a swing motor, it is generally required that the output torque is large, the structure is simple and compact, the price is low, and the energy loss is small. Conventionally, this type of swing motor includes, for example, a vane type, a rack and pinion type, a Scotch yoke type and the like. The vane type is a swing motor that receives fluid pressure in a vane directly connected to a rotation output shaft and applies the force of the fluid directly to the rotation output shaft. In addition, the rack and pinion type applies a fluid pressure to a piston that linearly moves, and a pinion that is integrally formed with a rotation output shaft is rotated through a rack that is integrally formed with this piston to rotate the rotation output. Is a swing motor that generates Furthermore, in the Scotch yoke type, in addition to the piston that linearly operates the fluid pressure, the pin that is integrally configured with the piston slides in the notch groove that is integrally configured with the rotation output shaft. Generate a rotation output. It is a swing motor.

[0003]

The vane type is said to have the highest efficiency because it directly converts the pressure of the fluid into rotation, but the conventional vane type has each of the rectangular cross sections of the fluid pressure receiving portion of the output shaft. There is a problem in that the fluid seal at the corner is incomplete, and the fluid seal at the joint between the rotary output shaft and the vane is particularly incomplete, resulting in leakage of the pressurized fluid.

Also in the vane type, there is a swing motor in which leakage of the pressurized fluid is prevented by inserting an integral packing for the fluid seal of the fluid pressure receiving portion and the seal of the rotary output shaft. The rotation angle of the shaft is limited to about 90 °.

In the rack and pinion type, the force of the pressurized fluid is converted into a mechanical force that is a linear motion of the piston,
In addition, the mechanical structure of the rack and pinion mechanism converts it to rotational motion and takes it out as rotational output, so the structure is complicated,
There is a problem of increasing the size and also a problem of mechanical backlash.

Further, in the scotch yoke type, as in the rack and pinion type, the force of the pressurized fluid is taken out once as a linear movement of the piston and is taken out as a rotational output by using the Scotch yoke mechanism. Similar to the shape, there is a problem that the structure is complicated and large, and there is a problem that play occurs, and there is also a problem that the rotational output torque changes depending on the rotational angular position. The present invention solves the above problems, has a simple structure, can be downsized, can be freely manufactured with a rotation angle of up to 270 °, and can reduce fluid leakage. An object is to provide a swing motor.

[0007]

In order to achieve the above object, the structural feature of the invention according to claim 1 is that a casing has a cylindrical inner surface and both ends thereof are sealed with lids, At the central axis position of the cylindrical shape, the rotary output shaft penetrating through the lid is fitted and fixed to the rotary output shaft in the casing, and swings integrally with the rotary output shaft. A movable vane of a polymer resin elastic body having a continuous convex portion that is elastically pressed and slid on the inner surface of the cylindrical circumference and the inner surface of the casing of both lids is provided, and the cylinder The inner peripheral surface, the lid, and a rubber packing that seals a rectangular cross section surrounded by the cylindrical portion of the moving vane, and has fixed vanes fixed to the lid, and both sides of the rubber packing. Is provided with a supply port capable of supplying a pressurized fluid. The rotating output shaft oscillates through the moving vane by adding a pressurized fluid from one side, and the moving vane uses a member made of a polymer resin elastic body. The reason is that the leakage of fluid from the tank was made extremely small.

[0008]

The operation and effect of the present invention is as follows.
In the invention according to claim 1, a polymer resin that can swing integrally with a rotary output shaft and has a continuous convex portion that elastically press-contact slides on the inner surface of the cylindrical circumference and the peripheral surface portions of the casings of both lids. Close the fluid on both sides of the moving vane of the elastic body, and
Since the leakage of the fluid from the fitting hole of the rotary output shaft that penetrates both lids is closed at the same time, the structure is simple, the size can be reduced, and the rotation angle can be up to 270 °. Leakage can be reduced.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 7 schematically show a swing motor according to an embodiment of the present invention. The swing motor M is provided with a tubular body 1 having a cylindrical tubular body 2 and lids 3a and 3b on both end surfaces of the tubular body. As shown in FIG. 1, the cylindrical body 2 is provided with fluid pressurizing ports 2a and 2b on its side wall, and a slight continuous convex portion 2 is formed at a portion along the inner peripheral surface of both end surfaces.
c is provided. Then, a plurality of fixing screw holes 2d are provided in the both end portions of the projecting portion, which are not convex portions.

The lids 3a and 3b are provided at their centers with through holes 3a1 and 3b1 for inserting a rotation output shaft 4 which will be described later. The through holes 3a1 and 3b1 have bearings 3a2, respectively.
3b2 is provided. The cylindrical body 2 is attached to the lids 3a and 3b.
A plurality of holes 3a3, 3b3 corresponding to the screw holes 2d of the cylindrical body 2 are formed by inserting a bolt 7 into the holes 3a3, 3b3 and screwing the bolts 7 into the screw holes 2d of the cylindrical body 2.
Fixed to. In the tubular body 1, a motion vane 5 described later fixed to the rotation output shaft 4 is arranged, and a fixed vane 6 described later is arranged together with the packing 6a,
It is fixed to the lids 3a and 3b with the pin 6b.

The motion vane 5 is fitted and inserted into the vane core 4a and the rotary output shaft 4 fixed to the rotary output shaft 4, and the vane 5 is attached to the inner peripheral surface of the cylindrical body 2 and the inner end surfaces of the lids 3a and 3b. Swing while sliding.

The fixed vanes 6 have pins 6 on the lids 3a and 3b.
packing 6a fixed on b and mounted on the fixed vane 6
Are pressed against the cylindrical portion 5a of the motion vane 5, the inner peripheral surface of the cylindrical body 2, and the lids 3a and 3b.

Next, the assembly of the swing motor M will be described. First, the motion vane 5 is fitted into the rotary output shaft 4, and the packing 6a is fixed to the lower lid 3b into which the bearing 3b2 is fitted and press-fitted. The vane 6 is fixed via the pin 6b, and the rotary output shaft 4 is fitted into the hole 3b1 of the lower lid 3b. Next, the tubular body 2 is screwed to the lower lid 3b with the bolt 7 through the screw hole 2c. Further, the rotary output shaft 4 is fitted and inserted in the hole of the upper lid 3a into which the bearing 3a2 is fitted and press-fitted, and the fixed vane 6 and the upper lid 3a are inserted and fixed through the pin 6b.
A is screwed onto the cylindrical body 2 with the bolt 7 through the screw hole 2d.

Next, the swing motor M constructed as described above.
The operation of will be described. As shown in FIG. 2, the swing motor M assembled in this manner is used in the fluid pressure port 2
The fluid pressurized from a or 2b is the moving vane 5
And, the rotary output shaft 4 is sealed by the packing 6 a and rotates together with the moving vane 5. Fluid pressurization port 2
When the fluid is pressurized by a and the pressurized fluid is discharged from the fluid pressure port 2b, the rotary output shaft 4 together with the moving vane 5 is discharged.
Rotates as shown in FIG. 6, and the fluid pressure port 2b
As a result, when the fluid is pressurized and the pressurized fluid is discharged from the fluid pressure port 2a, the rotary output shaft 4 rotates together with the motion vane 5 as shown in FIG. Exercise vane 5 at this time
Is a polymer resin elastic body, and since it generates an appropriate strain stress, it is pressed against all of the cylindrical body 2 and both lids 3a and 3b and is attached to the fixed vane 6. Since the packing 6a is also in pressure contact, the leakage of the pressurized fluid can be significantly reduced, and the rotation output efficiency can be increased.

As described above, the rocking motor according to this embodiment has a greater leakage than the conventional rocking motor.
Because it can be made smaller, its shape can also be made smaller,
By adopting the moving vane made of a polymer resin elastic body, the structure becomes simple and the rotation angle can be made large.

[0016]

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a swing motor according to an embodiment of the present invention.

FIG. 2 is a view showing a state in which an upper lid of the swing motor is removed, and is a plan view showing a state in which a rotation output shaft is in the middle of a swing angle.

3 is a sectional view taken along line II-II of FIG.

FIG. 4 is a diagram of an exercise vane.

FIG. 5 is a diagram of a rotary output shaft.

FIG. 6 is a view of the same swing motor as in FIG. 2 with the upper lid removed, and is a plan view of the state in which the rotation output shaft is at the swing end.

7 is a view of the same swing motor as in FIG. 2 with an upper lid removed, and is a plan view of a state in which the rotation output shaft is at the swing end opposite to that in FIG. 6.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1; Cylindrical body, 2; Cylindrical body, 2a, 2b; Fluid circulation port, 3a, 3b; Lid body, 4; Rotation output shaft, 5; Motion vane, 6; Fixed vane, 6a; Packing,
M: Swing motor

Claims (1)

[Claims] 1. A casing having an inner surface of a cylindrical shape and both ends thereof sealed with a lid, and a central axis line position of the cylindrical shape,
A rotation output shaft that penetrates through the lid, and is fitted and fixed to the rotation output shaft in the casing, is swingable integrally with the rotation output shaft, and has a cylindrical inner peripheral surface. And a moving vane of a polymer resin elastic body having a continuous convex portion that elastically press-contacts and slides on the inner surface of the casing of both lids, and the cylindrical inner peripheral surface, the lid, and the moving vane. A rubber packing that seals a rectangular cross section surrounded by a and a fixed vane that is fixed to the lid body are provided, and a supply port that can supply a pressurized fluid is provided on both sides of the rubber packing. A swing motor in which the rotary output shaft swings through the moving vane by applying a pressurized fluid from one side.