JPH06109092A - Rotary driving device using reciprocating motion - Google Patents

Abstract

PURPOSE:To permit the continuous operation by engaging the projection of an engagement member into the wave shaped groove of a cylindrical groove member, turn-revolving one by moving the other in reciprocation and setting the outer edge part, forming an angular difference in the revolution direction of the groove member from the inner edge part, at the edge parts on both the sides of the groove. CONSTITUTION:On the peripheral surface of a groove member 20 having a cylindrical surface, a groove 23 which forms a loop surrounding the center axis line in a wave form in one cycle through development is formed. The groove 23 is formed so that the outer edge of an outer edge part 25 has an angular difference (d) in a prescribed revolution direction of the groove member 20 from the outer edge of an inner edge part 26, at each dead center on both the sides of the groove 23. The projection part 18 of an engagement member 15 is inserted in shiftable manner into the groove 23. The groove member 20 is revolved by moving an engagement member 15 in reciprocation by the piston 13 of a reciprocating movement device 10. With this constitution, operation can be started from any starting point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating rotary drive device, for example, a device for rotating in a predetermined direction by a cylinder operated by fluid pressure.

[0002]

2. Description of the Related Art In an embodiment disclosed in Japanese Patent Laid-Open No. 2-64272, a sawtooth guide groove is formed around a piston attached to a permanent magnet that moves forward and backward in a predetermined direction, and a fixed groove is formed around the piston. There is a proposal to insert a guide pin in the groove into the groove and rotate the permanent magnet forwards and backwards by a solenoid and at the same time rotate in a predetermined direction. It is unpredictable, and in some cases, it is possible that neither rotation is possible at all, or reciprocating rotation is possible within a slight angular range. In addition, international publication W
O92 / 13194 discloses an apparatus for continuously rotating and driving in a predetermined direction by fluid pressure using a cylinder block having a plurality of cylinders. However, there are some cylinders that use a single cylinder to rotate in one direction and then rotate in the opposite direction, but a single cylinder that operates by fluid pressure to continuously rotate in a predetermined direction. There is no known use of.

[0003]

SUMMARY OF THE INVENTION The present invention provides a rotary drive device by reciprocating motion that can reliably and continuously rotate in a predetermined direction based on a single reciprocating motion.

[0004]

According to the present invention, a groove member having a corrugated groove formed on a cylindrical surface to surround a central axis and forming a loop, and a groove member which is inserted into the groove and is relatively movable in the axial direction of the groove member. And an engaging member having a protruding portion formed on the groove member, and the reciprocating means applies reciprocating motion in the central axis direction of the groove member to either one of the groove member and the engaging member to determine which one of the groove member and the engaging member. In the case of rotating by a reciprocating motion, the groove of the groove member is formed such that the outer edge portion at both end portions has an angular difference from the inner edge portion in a predetermined rotation direction of the groove member. A drive device is provided. The present invention also relates to such a device, wherein the reciprocating means is a cylinder operated by fluid pressure, and the reciprocating means is mechanically operated to automatically reverse the inflow and outflow of the working fluid at the dead point of the cylinder. The present invention provides a rotary drive device by reciprocating motion, which is characterized in that a valve device is provided.

[0005]

Embodiments of the present invention will be described below. In the embodiment of the present invention shown in FIGS. 1 to 3, 10 is a reciprocating device including a fluid pressure operating device such as an air cylinder or a hydraulic cylinder. This reciprocating device has a cylinder 12, and an engagement member 15 composed of a piston rod extends long from a piston 13 in the cylinder 12. From the center of the engaging member 15, for example, the key 1
A frame 6 is attached to the cylinder 12 and slidably penetrates the frame 17 so as not to rotate. A protruding portion 18 protruding in the lateral direction is provided at the center of the engaging member 15.

Reference numeral 20 denotes a groove member having a cylindrical surface whose central axis is arranged parallel to the advancing / retreating direction of the engaging member 15.
The shaft portions 21 and 22 on both sides are rotatably supported by the frame 17. A groove 23 is formed on the peripheral surface of the groove member so as to form a loop around the central axis so as to form one cycle when expanded. The groove may have an appropriate number of cycles, such as two cycles, and the waveform may be various waveforms such as a triangular wave and a sine wave. The projecting portion 18 is movably inserted into the groove 23, and the groove member 20 is rotated when the engaging member 15 moves back and forth due to the movement of the piston 13. As shown in FIG. 3, the groove 23 is formed so that the outer end of the outer edge portion 25 has an angle difference d in the predetermined rotation direction of the groove member 20 from the outer end of the inner edge portion 26 at the dead points on both sides. This angular difference d need not be equal to each other.

The reciprocating device 10 operates to engage the engaging member 15.
When the protrusion 18 reaches the dead center as shown by 18a, the next movement is always only on one side of the inner edge 26 as shown by 18b. Then, the groove member 20 is rotated in the direction of the arrow in the figure by exerting a pressing force on the groove member 20. Therefore, even if the reciprocating device 10 simply reciprocates the engaging member 15, rotation in the predetermined direction can be continuously obtained. The output of this rotation is an output unit 28 including a pulley attached to the shaft 21.
It can be taken out from.

Numerals 30 and 31 are hoses (not shown) which supply and discharge fluid such as compressed air or pressure oil to both ends of the cylinder 12 of the reciprocating device 10 via solenoid valves and hoses (not shown). Is a connection port for connecting the. 32, 33
Is a switch composed of a micro switch or the like attached to the frame 17 at the positions shown in the drawing.
Although not shown in detail, when the contact members 35 and 36 whose positions are adjustable are brought into contact with each other, a signal is emitted to reverse the supply and discharge of fluid such as compressed air. That is, in FIG. 1, when the piston 13 moves to the left and reaches the vicinity of the dead center, the contact member 36 contacts the switch 33 to generate a signal to operate the solenoid valve to supply the fluid from the connection port 30 and discharge it from the connection port 31. Will work like.
Therefore, the piston 13 starts to move in the opposite direction. In the figure, when the piston 13 reaches a dead center near the right end, the contact member 35 contacts the switch 32, and the moving direction of the piston 13 is reversed by the signal. Thus, the piston 1 of the reciprocating device 10
By reversing the flow direction of the compressed air instantaneously every time 3 reaches the dead center, the reciprocating device 10 can be maintained in the operating state at any moment.

In another embodiment of the present invention shown in FIGS. 4 and 5, the groove member 20 has a tubular shape, both ends of which are rotatably supported by the frame 17 via bearings 38, and the output portion 28 is provided on the outer surface. Is provided and the groove 23 is formed on the inner surface. When unfolded, this groove has a structure similar to that shown in FIG. 3, for example. The switches 32 and 33 are attached to the frame 17 as shown, and are operated by a common contact member 37 attached to the outer surface of the groove member 20. In this embodiment as well, the groove member 20 is rotated only in a predetermined direction as in the above embodiment.

In another embodiment of the present invention shown in FIG. 6, a groove member 20 having a groove 23 which becomes two cycles by the reciprocating device 10 is a developed view in which two developed views shown in FIG. 3 are continuous. Is reciprocated, and is prevented from rotating by a key 41 provided on the shaft portion 40 penetrating the frame 17. The engaging member 15 is a tubular member that surrounds the groove member 20 with an output portion 28, and has a pair of symmetrical protrusions 18 that are inserted into the groove 23 from the inner surface. It is designed to rotate in the direction. Reference numeral 39 denotes bearings provided at both ends of this engaging member, and illustrations of switches and the like are omitted. In this embodiment, the reciprocating motion of the reciprocating device 10 makes the engaging member 15 rotate once when the reciprocating motion is performed twice.

In another embodiment of the present invention shown in FIG. 7, there is provided a groove member 20 rotatably mounted around the axis of the piston rod 42, and the groove member 20 is formed on the outer peripheral surface thereof.
The projection 18 of the engaging member 15 at a predetermined position is inserted into the groove 23 which is a developed view similar to that shown in FIG. The output portion 28 is rotatably supported at a predetermined position on the frame 17, and is provided on a shaft 45 which allows the groove member 20 to move forward and backward by the key 43 and rotates integrally with the groove member 20.
Also in this embodiment, although not shown, the groove member 20 is rotatable only in a predetermined direction. Also in this embodiment, illustrations of switches and the like are omitted.

In each of the embodiments shown in FIGS. 1 to 3 and FIGS. 4 and 5, when a piston 13 reaches a dead center using a switch, the flow direction of a working fluid such as compressed air is automatically generated regardless of rotation. It is designed to be reversed, but Figs.
1 shows a valve device 50 that automatically and mechanically performs such an operation. Reference numeral 51 is a valve body formed by connecting a plurality of members, and is an inflow port 5 connected to a pressurized fluid source.
2 and the outlet 53, and the connecting ports 30 and 3 provided in the cylinder 12 of the reciprocating device 10 as shown in FIG. 1, respectively.
1. Connection port 5 for connection via a hose or the like not shown in FIG.
5, 56 are provided. Reference numeral 58 is a valve provided in the valve body 51 so as to be rotatable within a predetermined angle range.
A recess 60 communicating with the recess 2 and a recess 63, which is symmetrical to the recess 60, are formed on both sides of the recess 60 so as to communicate with the outflow port 53 via the closing portions 61 and 62, respectively. Reference numeral 65 is a shaft portion extending from the valve to the outside of the valve body 51. Valve 58
10, the inflow port 52 is connected to the connection port 30 of the reciprocating device 10 via the recess 60 and the connection port 55, and the outflow port 53 connects the recess 63 and the connection port 56. It is connected to the connecting port 31 of the reciprocating device 10 via the. When the valve 58 rotates from this state to the state shown by the chain line, the outflow port 53 and the inflow port 52 are connected to the connection ports 30 and 31, respectively.
Will be in communication. Therefore, it is necessary to automatically perform this switching when the piston reaches the dead center.

Reference numeral 67 is a lever fixed to the outer end of the shaft portion 65 and is rotatable within a range regulated by stoppers 68 on both sides. Reference numeral 70 denotes an operation member that can be moved back and forth in the lateral direction, and as shown in the drawing, the tip end portion of the lever 67 and the spiral spring 72.
It is connected with. For example, the engaging member 15 as shown in FIG.
When the contact member 35 attached to the advancing / retreating member contacts the operation member 70 from the left side in FIG. 8 and moves for a predetermined amount or more to reach the dead center, the center line of the spiral spring 72 is the center axis of the shaft portion 65. When it exceeds the range, the lever 67 suddenly and automatically rotates together with the valve 58 due to the elastic force of the helical spring 72, and the operating member 70 also moves slightly automatically so that the valve 58 becomes as shown by the chain line in FIG. The movement of the piston 13 in 12 is reversed. Further, when the contact member 36 comes into contact with the operating member 70 from the opposite side, the valve 58 and the like are similarly rotated in the opposite direction.

In the present invention, for example, the international publication W
Similar to the one illustrated and described in O92 / 13194, a shaft 75 provided laterally protruding from the engaging member 15 as shown in FIG. 12 and comprising a cylindrical body rotatably mounted on this shaft, or It is also possible to configure the rotating projections 18 such as those directly rotatably mounted on the engaging members 15 into the grooves 23 so as to reduce the friction loss.

In the present invention, it is needless to say that the reciprocating device 10 may include, for example, a device including a permanent magnet that can be reciprocated by a solenoid.
Further, the output unit 28 may be changed to a gear or other means.

[0016]

As described above, the present invention has the effect that the output unit 28 can always rotate in a fixed direction when the reciprocating device 10 reciprocates. Particularly, in the case where the reciprocating device 10 is one cylinder that operates by fluid pressure such as hydraulic pressure or air pressure, continuous rotation can be easily obtained. Further, in this invention,
The one having the valve device 50 which automatically and mechanically reverses the flow direction of the fluid when the piston reaches the dead center has a simple structure.

[Brief description of drawings]

FIG. 1 is a front view showing a notched part of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a development view of the groove member.

FIG. 4 is a front view showing a part of another embodiment of the present invention in section.

5 is a sectional view taken along line 5-5 in FIG.

FIG. 6 is a front view showing a part of still another embodiment of the present invention in section.

FIG. 7 is a front view showing a part of still another embodiment of the present invention in section.

FIG. 8 is a front view showing a valve device.

FIG. 9 is a plan view thereof.

10 is a sectional view taken along line 10-10 in FIG.

11 is a cross-sectional view taken along the line 11-11 of FIG.

FIG. 12 is a perspective view showing a change of a protruding portion.

[Explanation of symbols]

 10 Reciprocating device 12 Cylinder 13 Piston 15 Engaging member 18 Projection part 20 Groove member 23 Groove 25 Outer edge part 26 Inner edge part 28 Output part 50 Valve device

Claims (2)

[Claims] 1. A member having a groove member formed on a cylindrical surface to form a loop-shaped groove surrounding a central axis, and a protruding portion inserted into the groove so as to be relatively movable in the axial direction of the groove member. A combination member, wherein one of the groove member and the engaging member is reciprocated in the central axis direction of the groove member by a reciprocating device to rotate either the groove member or the engaging member, A rotary drive device by reciprocating motion, wherein the groove of the groove member is formed such that an outer edge portion has an angle difference from an inner edge portion in a predetermined rotation direction of the groove member at both ends thereof. 2. The reciprocating device is a cylinder operated by fluid pressure, and a mechanically operated valve device that automatically reverses the inflow and outflow of the working fluid at the dead point of the cylinder is provided. The rotary drive device by reciprocating motion according to claim 1.