JPS60146927A - Free wheel used for mechanism converting reciprocating motion into rotary motion - Google Patents

Abstract

PURPOSE:To eliminate the necessity for a useless pawl and enable the large power to be transmitted, by mounting hook-shaped pawls, swivelled by a spring, to an inner wheel while providing notches on the internal surface of an outer wheel and locating an acting point of the spring for the pawl nearer than its actuating point to a swivelling axis. CONSTITUTION:An inner wheel mounts two hook-shaped pawls 1 of swivelling type by a spring, while an outer wheel provides on its internal surface two notches 2. The pawl 1, in which a distance between points A-B becomes smaller than a distance between points A-C by positioning the acting point B of a compression spring 3 to the point A of a swivellng axis from the actuating point C, provides a movement of the point C faster than a movement of the spring, decreasing the force by tension of the spring smaller at the point C. In this way, friction force generated with the outer wheel, when it is raced, is decreased by reducing a play D provided with the notch 2 because the pawl 1 is actuated fast.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a freewheel used in a mechanism for converting periodic reciprocating motion into rotational motion, such as a reciprocating engine.

Conventionally, freewheels used in bicycles and the like have many pawls, which causes fatigue in the seven springs that exert alternating rotation due to the reciprocating motion of an internal combustion engine or the like.

If the alternating rotation is fast, the speed of the spring's movement will allow some play between the spring and the other claw before the force is transmitted. Also, if the pawl is made larger to transmit large horsepower, the spring must be made stronger to make it work.

This creates a large frictional force when the engine is idling.

This invention is based on the previous invention, "Mechanism J (57-048898) for changing reciprocating motion into rocking motion and obtaining rotational motion" and "Mechanism J (57-048898) for changing reciprocating motion into rotational motion using a freewheel".
58-192943), it relates to a freewheel that applies alternating rotation obtained by reciprocating motion at constant rgJ intervals like a reciprocating engine. The purpose is to obtain a freewheel that can effectively transmit and transmit even large objects.

The power of alternating rotation, which is changed from reciprocating motion in this invention, is 4
1st to 11th flU examples when it acts only 1/1 turn
I will explain. Since these are provided with two sets of claws, force can be transmitted reliably. An embodiment in which the alternating rotating forces act for one-half revolution will be described with reference to FIGS. 22-27. In this case, only one set of claws is provided, but the information can be transmitted and reached effectively with less waste on both sides.

Figure 1.2 shows a spring-type swing type hook-shaped claw 1 and 2 attached to a circular ring.
This is a freewheel with two claws 2 on the inner surface of the outer ring.

By placing the action point B of the compression spring 3 in the claw 1 closer to the oscillating axis A than the action point C, the
The distance between B becomes shorter, the movement of point C becomes faster than the movement of the spring, and the movement of the spring becomes smaller at point C. Therefore, nail 1
Because it moves quickly, the play D with the pawl 2 is reduced, effectively transmitting the sword, and the force from the spring is reduced at the operating point C, so the frictional force between it and the outer ring is reduced when it is spinning idly.

Furthermore, since the pawl 1 is hook-shaped and rotates around point A, it has the advantage of slightly reducing play D.

Figure 3.4 shows a freewheel in which two straight spring-type swinging pawls 5 are attached to both the inner and outer rings.

Placing the action point B of the leaf spring 6 on the pawl 5 closer to the swing axis A than the operating point C is the same as in the case of Ml, 2fJgJ, but by attaching it to the inner ring and outer ring, both pawls operate. Therefore, the play D can be reduced and force can be transmitted effectively.

Figures 5 to 7 show a freewheel in which a spring-type diagonally movable pawl 8 or 16 is housed in an oblique hole in the inner ring, and a pawl 13 is provided on the inner surface of the outer ring.

This is because when the pawl 8 or 15 is moved diagonally, it follows the pawl 13 and the play D is reduced.

In the case of FIG. 6, a notch 9 is provided in the pawl 8, so that when the pawl 13 acts, it is supported by a receiving surface 10 provided on the inner ring so that it does not return.
It transmits power. However, in that case, the claw 8 becomes the claw 13.
Since it is slightly tilted in the direction of action, the play D has increased, and although it depends on the inclination angle of movement, it is not much different from unnecessary entanglement of notches when the claws are moved in the radial direction.

In the case of Fig. 7, a notch 17 is provided in the diagonal hole 16 to prevent the claw 16 from returning, but when the claw 13 acts, the inclination of the claw lδ is less than in the case of Fig. 6. , power can be transmitted effectively.

In addition, when the claws are moved in the radial direction, the length of the spring movement is smaller than when moving diagonally, so the action can be completed in a shorter time.
From this point of view, it is better to move the claws in the radial direction in order to reduce the play D.

Figure 8.9 shows a spring-loaded swing type straight pawl 18 attached to one of the wheels in contact, and a pawl 19 attached to the side of the other wheel.
It is a freewheel with a

There is nothing new about the amount of play D, etc., but the difference is that the pawl moves in the axial direction.

Figures 10 to 15 show a freewheel in which a movable grooved cam type pawl 30 that also serves as a cylindrical follower is housed in the inner ring, and a grooved cam 25 with pawls 31 is provided on the side plate 24 attached to the outer ring. .

If the pawl is operated by a spring, the larger the pawl, the stronger the spring must be, which increases the frictional force when it spins idly. Therefore, since only small claws can be attached, large forces cannot be transmitted.

This freewheel uses a grooved cam to operate the claws, so even if the rotation is fast, the large claws can be operated reliably, and even large forces can be transmitted. Also, no frictional force is generated between the outer ring and the outer ring during idle rotation.

The side plate 24 provided with the grooved cam 25 may be fixed separately from the freewheel, but in order to reduce the play D, it is attached to the side surface of the outer ring with bolts 26 so that it rotates together with the outer ring.

The cylindrical pawl 30 is operated by 1s of the grooved cam to move in the radial direction, and the pawl 31 acts to transmit force to the inner ring. (Inner ring 2
2 alternately rotates through reciprocating motion, the cylindrical pawl 30 acts on the pawl 31 and transmits force to the outer ring. ) In the figure, the pawl 31 has a shape that only acts on the upper half of the pawl 30, but if the diameter of the pawl 30 is made smaller, the movement amount of one part is the same, that is, the play p is the same, and the lower half of the pawl 30 is It can be made to work up to.

The cylindrical claw 30 has a first
5. Sharpen the edges as shown in Figure 5.

This freewheel is simple in that the moving pawl 30 is cylindrical and also serves as a follower, and the mating pawl 31 is also integrated with a grooved cam.

, M16-21 are freewheels in which hook-shaped pawls 39 of the grooved cam type sweeping type are attached to the inner ring, pawls 41 are provided on the inner surface of the outer ring, and grooved cams 37 are provided on the side plates 34.

Compared to the previous freewheel, the force acting surface and follower of the moving pawl 39 are shaped differently, and the mating pawl 41 also has a grooved cam 3.
It differs from 7 in that it is separated.

The advantage of a hook-shaped pawl over a straight pawl is that the direction in which the pawl moves in an arc during movement moves in a direction that reduces the play D.

Figures 22 to 27 show a freewheel in which a grooved cam-type pawl 49 is housed in the inner ring, a pawl 51 is provided on the inner surface of the outer ring, and a grooved cam 47 is provided on the side plate 44 to widen the width of the force transmission surface in the axial direction. It is. The force of alternating rotation due to reciprocating motion is applied during one-half rotation, and there is one set of claws.

If the tin of the transmission surface is expanded in the axial direction, force can be transmitted even if the amount of radial movement of the pawl 49 is small, so the play D can be reduced.

Also, if the force of alternating rotation due to reciprocating motion is made to act for one-half rotation, the angle or length at which the force acts will be twice as much as when it is applied for one-quarter rotation. , even though the amount of play D is the same, the ratio is halved and the transmission efficiency is improved.

As described above, the present invention is a modification of a conventional freewheel for use in a mechanism that converts reciprocating motion into rotational motion.

Since the purpose is to convert the force generated by regular reciprocating motion into rotational motion, unnecessary claws were omitted to simplify the design. The play between the claw and the other claw before it begins to transmit force was reduced to improve transmission efficiency. Also, those using grooved cams instead of springs,
The large pawls operate reliably even at high rotational speeds, transmitting large amounts of force, and have the effect of not creating friction when spinning idly.

[Brief explanation of the drawing]

The figures show an embodiment of the freewheel of this invention. Figures 1, 3, and 5 are cross-sectional views, and Figures N2, 4, N6, and 7 are enlarged views of the main parts. Cross-sectional view, Figure 8 is cross section E-E, Figure 9 is side view, Figure 10, Figure 1.
6 and 22 are half-cut top views, FIGS. 11, 17, and 23 are elevational views, FIG. 12 is a cross section +1;-G, and FIG. 13 is a cross section FF. Fig. 14 is an enlarged view of part H, Fig. 15 is an enlarged side view of the claw 3o, the 18th factor is shown in the cross section -, and Fig. 19 is the cross section J-J. Figure N20 is an enlarged view of the L part, Figure 21 is an enlarged sectional view of the main part, Figure 24 is a cross section NN, and 251RI is a cross section MM. FIG. 26 is an enlarged view of part 0, and FIG. 27 is an enlarged sectional view of the main part. 1...Hook-shaped claw + 2.13...Claw 3112...Compression spring, 5.18...Straight claw 4.7+14.28.3
8.48... Pitch circle 6.20... Leaf spring, 8... Movable claw (with notch) 11... Diagonal hole, 15...
Transfer type claw 16... diagonal hole (@fired) 19... claw 21.27.36+46... pitch line 22.32.42... inner ring, 23,33e43, outer ring 24134.44... side plate 25.37.47...Groove cam 26.35.45...Bolt 30...F that also serves as a follower: Excitation claw 31...Claw 39 integrated with the groove cam...Hook station with follower Claw 40.50...Follower attached to the claw 41.51...Claw 49...Movable claw with follower Patent applicant Takeshi Takagaki; t-1 figure 21 yen] 3rd orchestra session Oh'7rg! J Ogzubo 9 Flashing spear 1λ side first 94 74

Claims (1)

[Claims] 1. It is used to convert the force caused by regular reciprocating motion into rotational motion, and eliminates unnecessary claws, so that even if the rotation is far, there is no play until the claw starts transmitting force to the other claw. (D) is small;
A freewheel that has the following features to transmit even large amounts of force. 2. A hook next pawl (1) that swings with a spring is attached to the inner ring, and a pawl (2) is provided on the inner surface of the outer ring, and the point of action (B) of the spring on the pawl (1) is the operating point (C). ), the freewheel is placed closer to the swing axis (A). 3. Straight claws (5
) is attached, and the point of action (B) of the spring on the pawl (5) is located closer to the swing axis (A) than the point of action (C). 4. The inner ring has a claw (8) or (15) that moves diagonally with a spring.
) and has claws (13) on the inner surface of the outer ring. 5. Attach a straight claw (18) that swings with a spring to one of the adjacent wheels, and attach a claw (19) to the side of the other wheel.
) freewheel. 6. A pawl (30) that doubles as a cylindrical follower that moves with a grooved cam is housed in the inner ring, and a pawl (30) is housed in the side plate (24) attached to the outer ring.
Freewheel equipped with a grooved cam (26) with 31). 7. A freewheel with a hook-shaped pawl (39) attached to the inner ring that swings with a grooved cam, a pawl (41) on the inner surface of the outer ring, and a grooved cam (37) on the side plate (34). 8. A pawl (49) that moves with a grooved cam is housed in the inner ring, a pawl (51) on the inner surface of the outer ring, and a grooved cam (47) on the side plate (44).
A freewheel in which the force of reciprocating motion acts for one-half revolution.