JPH0617641B2 - Pneumatic rotating element - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to pneumatically powered continuous rotation. Explosives and dangerous materials are used in many industrial fields including the oil industry. Expensive electric motors have been used because the equipment used in these hazardous factories must meet safety exposure standards. In particular, recently, the use of propane instead of the use of CFC has increased, and the demand for exposure control equipment has increased.

2. Description of the Related Art Many conventional air motors are of vane type. However, it was difficult to extract torque unless this air motor was rotated at a high speed exceeding 10,000 rpm.
The motor required for equipment such as automatic machines is used after decelerating, and the rotation speed is about several tens to several hundreds of revolutions per minute.
A motor rotating at a high speed exceeding 10,000 rpm requires not only an expensive reducer having a high reduction ratio but also an energy loss in the reducer, which is not practical. It was also possible to get the rotation by reciprocating the latch with the combination of the latch and the gear, and reciprocating the rack with the cylinder with the combination of the rack and the gear, but only when the rack moved in one direction. Since the gears are rotated, the rotation is uneven and smooth rotation cannot be obtained. With this method, the cylinder is controlled from the outside, so it can be used for intermittent motion such as an index, but it was not suitable for continuous rotation. It is an object of the present invention to obtain a small air-actuated rotary element capable of rotating several tens to several hundreds of revolutions per minute.

Problems to be Solved by the Invention As described above, since a small rotary element capable of rotating several tens to several hundreds of revolutions per minute cannot be manufactured at present, hydraulic pressure is often used. . However, hydraulic pressure not only requires an expensive pump, but also exudes oil and deteriorates the factory environment such as a clean room.

An object of the present invention is to obtain a smooth rotational motion by using a pneumatic device that reciprocates such as a cylinder and a rotary actuator as a power source, and outputs energy for rotation in the forward and backward paths of the reciprocating motion of the pneumatic device. The purpose is to determine the rotating element applied to the shaft.

Means for Solving the Problems FIG. 1 is a diagram for explaining the principle of the present invention. A rotating shaft 1 connected to a load has two one-way clutches 2 and 3, and an outer ring 4 having the clutch 2 as a center and an outer ring 5 having a clutch 3 as a center are fixed to the respective clutches. An arm 6 is fixed to the outer ring 4 and an arm 9 is fixed to the outer ring 5. A pin 7 is rotatably supported on the tip of the arm 6, and a drive rod 8 is rotatably supported on the pin 7. A pin 10 is pivotally supported on the tip of the arm 9, and a drive rod 11 is pivotally supported on the pin 10. The drive rods 8 and 11 are connected to a well-known reciprocating drive mechanism such as a cylinder (not shown). The one-way clutches 2 and 3 provided on the rotary shaft 1 are mounted in the same direction.
For example, the rotation is transmitted when the outer ring 4 is rotated clockwise, and the rotation is transmitted when the outer ring 4 is rotated counterclockwise.
When the outer ring 5 is rotated clockwise, the rotation is transmitted to the clutch 3, and when the outer ring 5 is rotated counterclockwise, the rotation is transmitted to the rotating shaft 1.
It is installed so as not to be transmitted to. In FIG. 2, the drive rods 8 and 11 shown in FIG. 1 are connected to the drive rods 8 and 11 by connecting rods 23 through shafts 21 and 22, and the connecting rods 23 have a well-known reciprocating structure such as a cylinder (not shown). The drive shaft 24 connected to the moving element is fixed. The drive shaft 24 has a protrusion 25. The sliding metal fitting 26 is held by a metal fitting (not shown) so as to be slidable in the longitudinal direction, but is made to toggle by a known means such as a spring, and the sliding metal fitting 26 is a switching valve when moved downward in the drawing. 27 is operated.

Operation The operation of the present invention will be described with reference to FIG. In the initial state, it is assumed that the sliding metal fitting 26 pushes the switching valve 27, the switching valve 27 is pushed, the cylinder (not shown) moves forward, and the drive shaft 24 is pushed toward the rotary shaft 1. Since the drive shaft 24 moves forward, the drive rods 8 and 11 move forward by the connecting rod 23 to rotate the arms 6 and 8 fixed to the outer races 4 and 5 via the pins 7 and 10. The rotation is transmitted when the outer ring 4 is rotated clockwise, and the rotation is transmitted when the outer ring 4 is rotated counterclockwise.
Install the clutch 2 so that it is not transmitted to the clutch 3
Is transmitted when the outer ring 5 is rotated clockwise,
Since the rotation is not transmitted to the rotary shaft 1 when the outer ring 5 is rotated in the counterclockwise direction, the drive rod 8 moves forward to move the arm 6 in the clockwise direction. The outer ring 4 rotates clockwise and transmits the rotation to the rotary shaft 1 through the one-way clutch 2, so that the rotary shaft 1 rotates clockwise. On the other hand, the drive rod 11 connected to the other end of the connecting rod 23 advances simultaneously with the drive rod 8 and rotates the arm 9 counterclockwise via the pin 10. The outer ring 5 connected to the arm 9 rotates in the counterclockwise direction, but the one-way clutch 3 slips and the rotation in the counterclockwise direction is not transmitted to the rotating shaft 1.

When the cylinder advances and the drive shaft 24 reaches the advance end, the projection 25 attached to the drive shaft 24 advances the sliding fitting 26, opens the switching valve 27, and supplies air so that the cylinder retracts. Therefore, the cylinder starts to retract and the drive shaft 24 retracts. Since the drive rod 11 moves backward to move the arm 9 clockwise, the outer ring 5 connected to the arm 9 rotates clockwise, and the rotation is transmitted to the rotary shaft 1 through the one-way clutch 3. Rotates clockwise. On the other hand, the drive rod 8 moves forward simultaneously with the drive rod 11 and rotates the arm 6 counterclockwise via the pin 7. The outer ring 4 connected to the arm 6 rotates counterclockwise, but the one-way clutch 2 slips and the counterclockwise rotation is not transmitted to the rotary shaft 1. The cylinder retracts,
When the drive shaft 24 reaches the retracted end, the projection 25 attached to the drive shaft 24 pushes the sliding metal fitting 26, pushes the switching valve 27, and switches the pneumatic circuit so that the cylinder moves forward.
Step 4 begins again. FIG. 3 illustrates the situation during this period. In the figure, A is the movement of the switching valve 27, and B is the rotation of the rotary shaft corresponding to the movement of the switching valve. A portion indicated by a high A is a portion where the switching valve 27 is pressed, and a portion 101 in which the drive shaft 25 moves forward and the rotary shaft 1 rotates is indicated by 101. The lower part of A is the switching valve 27
The reference numeral 102 of B indicates the rotation of the rotary shaft 1 due to the backward movement of the drive shaft 24 when is opened.

In this way, the energy of the forward and backward paths of the reciprocating drive element is transmitted to the rotary shaft 1 through the two one-way clutches without waste, and the rotation of the rotary shaft 1 is continued.

In order to rotate the rotary shaft 1 in the counterclockwise direction, rotation is transmitted when the outer ring 4 is rotated in the counterclockwise direction, and rotation is not transmitted to the rotary shaft 1 when the outer ring 4 is rotated in the clockwise direction. The clutch 2 may be installed so that the rotation is transmitted when the outer ring 5 is rotated counterclockwise and the rotation is not transmitted to the rotating shaft 1 when the outer ring 5 is rotated clockwise.

Because of this movement, the present invention has two one-way clutches so that the force can be transmitted to the rotary shaft when the piston of the cylinder, which is the driving element, moves forward and backward.

Embodiment FIG. 2 shows that the arms 6 and 9, the pins 7 and 10, the drive rods 8 and 10, and the shafts 21 and 2 are used to drive the outer wheels 4 and 5 of the clutch.
2. The linear reciprocating motion is changed to the rotation of the outer rings 4 and 5 by the link mechanism composed of the connecting rod 23. FIG. 4 uses a gear and a rack instead of this link. Drive elements such as reciprocating cylinders, sliding fittings, protrusions, and switching valves are not shown for simplicity. Two one-way clutches 2 and 3 are mounted on the rotating shaft 1. The one-way clutch 2 is inserted and fixed in the shaft hole of the gear 34, and the one-way clutch 3 is inserted and fixed in the shaft hole of the gear 35. The gear 34 meshes with the rack 37, and the gear 35 meshes with the rack 36. The racks 36 and 37 are fixed to a connecting rod 38, and the connecting rod 38 is fastened to a drive shaft 39.
The rotating shaft 1 can be rotated by the reciprocating motion of the.

In FIG. 5, the rack of FIG. 4 and the cylinder of the reciprocating drive element are integrated. The switching valve and air piping are not shown for simplicity. Also, a device that seals the gap between the rack and the air baffle to block the flow of air is not shown.

Two one-way clutches 2 and 3 are mounted on the rotating shaft 1.
The one-way clutch 2 is inserted and fixed in the shaft hole of the gear 34, and the one-way clutch 3 is inserted and fixed in the shaft hole of the gear 35. The gear 34 meshes with a rack 37, and the gear 35 meshes with a rack 36. The rack 36 slides in a blank 42, and the rack 37 slides in a blank 43. The air baffle 43 has ports 46 and 47 at both ends and is connected to a switching valve (not shown) by piping. The empty space 42 and the empty space 43 are connected by connecting pipes 44 and 45 at both ends thereof. Therefore, when the air is injected from the port 46, the air flows into the upper portion of the air baffle 43 and, at the same time, flows into the upper portion of the air boil 42 through the connecting pipe 45, so that the rack 37 is moved downward and the rack 36 is also lowered. Moved to. Therefore, the rotary shaft 1 rotates in the same manner as the above example. When the rack 37 reaches the lower end, the supply of air from the port 46 is stopped and the air starts to flow from the port 47, so that the lower portion of the air blower 43 is pressurized and the connecting pipe 4 is connected.
Since the air passing through 4 flows into the lower part of the air filter 42, the racks 37 and 36 are pushed back upward, and the rotary shaft 1 continues to rotate.

The embodiment shown in FIG. 6 uses a rotary actuator that makes a reciprocating rotation as a drive source, instead of a cylinder that makes a linear reciprocating movement. The one-way clutches 2 and 3 are mounted on the rotary shaft 1, the pulley 60 is mounted on the outer circumference of the one-way clutch 2, and the gear 63 is mounted on the outer circumference of the one-way clutch 3. The pulley 60 is wound around the drive pulley 61 by a belt 61, and the gear 63 meshes with the drive gear 64. The drive pulley 62 and the drive gear 64 are fixed to a drive shaft 65 connected to a drive source such as a rotary type reciprocating rotary actuator (not shown). The sensor of the control circuit of the switching valve (not shown) is mounted on the drive shaft 65.

The operation of rotating the rotary shaft counterclockwise in this embodiment will be described. The drive shaft 65 is rotated by a reciprocating rotary actuator (not shown) to drive the drive gear 64.
When the drive pulley 62 and the drive pulley 62 rotate counterclockwise, the pulley 60 rotates counterclockwise, the one-way clutch 2 transmits the rotation to the rotary shaft 1, the gear 36 rotates clockwise, and the one-way clutch 3 rotates. Rotates idly without transmitting the rotation to the rotary shaft 1. The rotary actuator reaches the forward end, the switching valve switches the pneumatic circuit by the sensor, the drive shaft reverses, the drive pulley 62 and the drive gear 64 rotate clockwise, the pulley 60 rotates clockwise, and the one-way clutch. 2 rotates idly without transmitting the rotation to the rotary shaft 1, the gear 63 rotates counterclockwise, and the one-way clutch 3 transmits the rotation to the rotary shaft 1 to rotate the rotary shaft 1 counterclockwise. The switching valve is switched again at the trailing end of the rotary actuator, and the drive shaft starts forward rotation, so that the rotary shaft 1 continues to rotate counterclockwise.

EFFECTS OF THE INVENTION The present invention obtains rotary motion by a reciprocating drive source, but the rotation angle of the rotary shaft by one reciprocating motion of the drive source can be obtained from several degrees to several hundreds degrees by selecting gears and pulleys. By controlling the flow rate of the supply air, it is possible to take out arbitrary rotations, and it is possible to take out several rotations per minute to several hundreds of rotations. Therefore, it is considered that the present invention greatly contributes to rationalization and automation in the industry handling dangerous goods.

[Brief description of drawings]

In the attached figure, the numbers connected with & indicate that the two parts are written in an overlapping manner, and that the part with the number before the & is on the top and the part after the & is on the spine. FIG. 1 is an explanatory view of the principle of the mechanism of the present invention: 1: rotating shaft, 2: one-way clutch, 3: one-way clutch, 4: outer ring, 5: outer ring, 6: arm, 7: pin, 8: drive rod, 9: Arm, 10: Pin 11: Drive rod Fig. 2 Mechanism of the present invention 1: Rotating shaft, 2: One-way clutch, 3: One-way clutch, 4: Outer ring, 5: Outer ring, 6: Arm, 7: Pin , 8: drive rod, 9: arm, 10: pin 11: drive rod, 21: shaft, 22: shaft, 23: connecting rod, 24: drive shaft, 25: protrusion, 26: sliding metal fitting, 27: switching valve Fig. 3 Motion of switching valve and rotary shaft A: Motion of switching valve, B: Motion of rotary shaft, 100: When switching valve is forward, 101: When driving shaft moves forward, 102: When driving shaft moves backward Fig. 4 Embodiment with gear and rack 1: Rotating shaft, 2: One-way clutch, 3: One-way clutch, 34: Gear, 35 Gears, 36: racks, 37: racks, 38: connecting rods, 39: drive shafts, Fig. 5 Example of teeth and cylinder type racks 1: rotating shaft, 2: one-way clutch, 3: one-way clutch, 34: gear , 35: gears, 36: rack, 37: rack, 41: body, 42: empty rod, 43: empty rod, 44: connecting pipe, 45: connecting pipe, 46: port 47: port Fig. 6 rotary reciprocating drive Examples of 1: Rotating shaft, 2: One-way clutch, 3: One-way clutch, 60: Pulley, 61: Belt, 62: Drive pulley, 63: Gear, 64: Drive gear, 65: Drive shaft.

Claims (3)

[Claims] 1. A rotating shaft, two one-way clutches provided on the rotating shaft for transmitting rotation in the same direction, an arm attached to one side of one outer periphery of the one-way clutch, and another one direction. It is composed of an arm attached to the opposite side of the outer circumference of the clutch and one linear reciprocating motion element that couples the two arms and swings them at the same time. A pneumatic rotary element having two one-way clutches that move forward and backward to rotate the rotary shaft in one direction during forward movement and backward movement of the reciprocating element. 2. A rotary shaft, two one-way clutches provided on the rotary shaft for transmitting rotation in the same direction, two gears having the one-way clutch as a center, and opposite sides of the rotary shaft. , A linear reciprocating element for connecting the two racks and simultaneously swinging the two racks together, and the rack is simultaneously moved forward and backward by an air-operated linear reciprocating element. The pneumatic rotary element having two one-way clutches for rotating the rotary shaft in one direction during forward movement and backward movement of the reciprocating element. 3. A rotary shaft, two one-way clutches provided on the rotary shaft for transmitting rotation in the same direction, a gear having one of the one-way clutches as a center, a drive gear meshing with the gear, and other An air-actuated device comprising a pulley having a one-way clutch as a center, a drive pulley wound around the pulley, a drive shaft to which the drive gear and the drive pulley are attached, and a rotary reciprocating element connected to the drive shaft. And a two-way clutch for rotating the rotary shaft in one direction by simultaneously rotating and rocking the gear and the pulley by the rotary type reciprocating motion element.