KR200162255Y1 - A magnetic type one-way clutch - Google Patents

Abstract

The present invention relates to a reverse rotation prevention device that is a magnet, and is equipped with a rotating body (7) and a reverse rotation prevention roller (9) equipped with a permanent magnet (6) between the inner and outer races (5, 2), It not only prevents reverse rotation of the transmission, but also makes it possible to engage smoothly with the rotating body even when the rotating body is stopped. It is possible, of course, to be used for all rotating bodies such as automobile transmissions, intermediate transmissions, washing machines, starting motors, conveyors, bicycles, shelves and motorcycles.

Description

Magnetic Reverse Rotating Device

The present invention relates to a reverse rotation preventing device of the power transmission mechanism, in particular, can be smoothly engaged with the gear of the rotating body in the state in which the gear connected to the rotating shaft is stopped, and there is almost no friction during free rotation for ultra-fast rotation The use of the present invention relates to a magnetic anti-rotation device that can be applied to various rotating bodies.

The rotation preventing device such as a roller clutch or an overrunning clutch, which has been used in a transmission of a vehicle so far, rotates well in one direction but does not rotate in the opposite direction. It is designed to prevent reverse rotation properly in the fixed gear. In such a conventional reverse rotation prevention device, when the to-be-engaged body is engaged with the gears of the rotating shaft in a stopped state, the probability of the gear blades being engaged with each other to be rotatable with each other is 50%. That is, when the rotating body is engaged with the rotating body in the stopped state, the gear blades of the rotating body and the gear blades of the rotating body are not only correctly engaged with each other, but sometimes the tops of the gear blades are opposed to each other to transmit power. Of course, since the gear is worn out, there was a problem that can not be used for shifting.

This phenomenon occurs because the rotating body and the rotating body does not have a flow gap with each other, the state of the power transmission occurs according to the state in which they are engaged with each other. There was a problem in that the gear can not be accurately engaged in the stationary state is difficult to effectively engage. In addition, due to severe friction with the anti-rotation bearing during high speed rotation of the rotating body, the noise increased, so that it could not be used even for ultra high speed rotation.

Therefore, the present invention was devised to solve the above problems, and the reverse rotation of transmissions used in various power devices is secured by installing a rotating body equipped with a permanent magnet and a reverse rotation prevention roller between inner and outer races. Not only can it be prevented, but it can be smoothly engaged with the rotating body even when the rotating body is stopped, and there is almost no noise even when the rotating body is freely rotating. The object of the present invention is to provide a magnetic anti-rotation device that can be used for all rotating bodies such as intermediate transmissions, washing machines, starting motors, conveyors, bicycles, motorcycles, and shelves.

1 (a) is a cross-sectional view in a state in which the reverse rotation prevention device according to the first embodiment of the present invention is installed between the inner and outer races,

(B) of Figure 1 is an operating state of the reverse rotation prevention device according to a first embodiment of the present invention,

(C) of Figure 1 is an exploded view of the reverse rotation prevention device according to a first embodiment of the present invention,

2 (a) is a cross-sectional view of the reverse rotation prevention device according to a second embodiment of the present invention,

(B) of Figure 2 is an operating state of the reverse rotation prevention device according to a second embodiment of the present invention,

(C) of Figure 2 is an exploded view of the reverse rotation prevention device according to a second embodiment of the present invention,

Figure 3 (a) and (b) is a cross-sectional view showing a third embodiment of the present invention is provided with a spring between the outer race and the rotating body in Figure 2,

(A) and (b) of FIG. 4 are cross-sectional views showing a fourth embodiment of the present invention in which the permanent magnet is not used in FIG.

(A) and (b) of FIG. 5 are cross-sectional views showing a fifth embodiment of the present invention in which the permanent magnet is not used in FIG.

(A) and (b) of FIG. 6 are cross-sectional views showing a sixth embodiment of the present invention in which the locking jaw of the pivot is removed in FIG.

(A) and (b) of FIG. 7 are cross-sectional views showing a seventh embodiment of the present invention in which the locking jaw of the pivot is removed in FIG.

(A) and (b) of FIG. 8 are cross-sectional views showing an eighth embodiment of the present invention in which the distance between the outer race and the rotating body is widened in FIG.

(A) and (b) of FIG. 9 are cross-sectional views showing a ninth embodiment of the present invention using two permanent magnets in each part of the pivot in FIG.

10 is a cross-sectional view showing a tenth embodiment of the present invention applying the inner and outer race as a gear in FIG.

11 is a cross-sectional view showing an eleventh embodiment of the present invention in which an interval between the inner race and the rotating body is widened while the outer race is applied as a gear;

(A) and (b) of FIG. 12 show a twelfth embodiment of the present invention, which can freely rotate in reverse using the locking rod in FIG. Cross-section,

13 is a cross-sectional view showing a thirteenth embodiment of the present invention in which only one locking jaw of the pivot is formed in FIG.

14 is a cross-sectional view showing a fourteenth embodiment of the present invention in which only two locking jaws of the rotating body are formed in FIG.

FIG. 15 is a cross-sectional view and an exploded view of a fifteenth embodiment of the present invention in which an intrusion preventing plate is installed to prevent intrusion of foreign matters from the outside in FIG. 1;

FIG. 16 is a cross-sectional view and an exploded view of a sixteenth embodiment of the present invention in which an intrusion prevention plate for preventing intrusion of foreign substances from the outside in FIG. 2 is installed;

(A) and (b) of FIG. 17 are cross-sectional views showing a seventeenth embodiment of the present invention in which the interior of the inner race slides with the rotating shaft in FIG.

(A) and (b) and (c) of FIG. 18 are cross-sectional views showing an eighteenth embodiment of the present invention in which two magnetic anti-rotation devices in the present invention are placed in opposite directions;

(A) and (b) of FIG. 19 show a nineteenth embodiment of the present invention in which the magnetic anti-rotation device according to the present invention makes it easy to pull out the gear in a neutral state when the magnetic anti-rotation device according to the present invention is applied to the anti-rotation prevention bite. One Section,

(A) and (b) and (c) of FIG. 20 are cross-sectional views showing a twentieth embodiment of the present invention in which a magnetic reverse rotation prevention device of the present invention is used as a starting motor.

<Explanation of symbols for main parts of drawing>

1: support plate 2: outer race

2a, 5a: gear blade 3: rotation shaft

3a: spline 4, 7a: locking jaw

5: internal race 6: permanent magnet

6a: auxiliary permanent magnet 7: rotating body

8: annular fixing plate 9: reverse rotation prevention roller

10 side plate 11 protector

12: hook rod 13, 15: spring

14: snap ring 16: rotary spline

17: internal race 17a: left insert

17b: right insert 18: Bendix gear

19: crimping portion A: magnetic reverse rotation prevention device

B: Ball bearing D: Starting motor

E: Rotating Body F: Helical Input Shaft Gear

G: Helical gearbox H: Flat gear idling gear

I: Flat differential output shaft gear K: Spacing (internal race and rotating body)

T: Spacing (of inner race and anti-rotation roller)

The present invention for achieving the above object, a plurality of engaging jaw is formed at a predetermined interval along any one of the outer circumferential surface of the inner race fixed to the rotating shaft or the inner circumferential surface of the outer race, fixed to the inner race and the support plate Between the external races, a plurality of rotating bodies having an L-shaped cross section equipped with permanent magnets are installed to correspond to the locking jaws at predetermined intervals. Between these rotating bodies, a fixed plate for supporting these rotating bodies and a reverse rotation prevention roller are provided. As the rotating shaft rotates in the forward direction, the rotating body and the roller disposed between the inner and outer races rotate together by the locking jaw, while the rotating shaft rotates in the reverse direction due to the reverse load or the like. In this case, the roller moves to the narrow side between the inner and outer races By being inserted into the key role, the inner race can no longer be reversed.

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

(A) to (c) of FIG. 1 shows a magnetic anti-rotation device according to the first embodiment of the present invention, which is a cross-sectional view of the magnetic anti-rotation device installed between the inner and outer races of FIG. As in (a) and (b), the outer race (2) is fixed to the support plate (1) constituting the body of the device, the locking jaw (4) having a triangular cross section on the rotating shaft (3) the outer peripheral surface at a predetermined interval A plurality of inner races (5) formed thereon are fixed, and a plurality of rotating bodies (7) having an L-shaped cross section in which permanent magnets (6) are mounted between the inner and outer races (5, 2) at predetermined intervals. An annular fixing plate 8 and a reverse rotation prevention roller 9 supporting these rotating bodies 7 are disposed between the rotating bodies 7 and correspondingly provided with the locking step 4.

Here, when the rotary shaft 3 is rotated clockwise as shown by the arrow, all the components disposed between the rotary shaft 3 and the support plate 1 also rotates smoothly clockwise, that is, the rotary shaft 3 As the clockwise rotation rotates the inner race 5 fixed to the rotary shaft 3 in the same direction, the L-shape on the locking step 4 formed on the outer circumferential surface of the inner race 5 rotated in this way. The locking jaw 7a of the rotating body 7 having a cross section of the rotating body 7 rotates together with the inner race 5 so that the annular fixing plate 8 supporting the rotating body 7 is provided. And the reverse rotation prevention roller (9) is also rotated by the rotating body (7) so that all parts between the rotating shaft (3) and the outer race (2) is rotated in the same direction as the rotation direction of the rotating shaft (3).

(B) of FIG. 1 shows a state in which the reverse rotation preventing device of the present invention is stopped after the reverse rotation is slightly reversed together with the rotating shaft 3 during the reverse rotation, and the rotating shaft 3 stops. When the gear (not shown) engaged with the rotation shaft 3 and the pitch-matching gear (not shown) engaged with the gear in the state are engaged, the gear installed on the rotation shaft 3 can rotate slightly, so that the gear is fixed even when the gear is fixed. It is designed to facilitate the engagement. That is, the gear coupled to the rotary shaft 3 is released from the pitch-matching gear for reasons of shifting and the like, and the gears on the rotary shaft 3, which are completely engaged after the shifting operation is completely engaged as desired, do not mesh with the pitch-matching gear blades. When the meshes are engaged with each other, as shown in (b) of FIG. 1, the rotation shaft 3 rotates backward within α ° to give a allowable flow interval for the engagement, so that the gears coupled to the rotation shaft 3 and the gears for pitch matching are rotated. Make sure they are meshed together exactly. The rotation of the rotational axis by α ° is caused by the reaction of the forces pushing the blade ends of both gears together.

Therefore, even when the gear of the rotating body is stopped, the gear of the rotating shaft 3 connected to the transmission side is smoothly engaged with the gear of the rotating body, and the rotating shaft 3 is rotated in reverse by a load in the reverse direction. When the annular fixing plate 8 is rotated in a reverse direction, for example counterclockwise by a reverse load or the like, the annular shape of the rotating body 7 is caused by the magnetic force of the permanent magnet 6 coupled to the annular fixing plate 8 of the rotating body. In the state in which the fixed plate 8 is stopped, the inner race 5 is reversed by α ° as shown in (b) of FIG. 1, so that the anti-rotation roller 9 has an inner and outer race 5, 2) The inner race 5 is no longer reversed by moving to the narrow side (the triangular top side of the catching jaw 4) and being inserted between the outer race 2 and acting like a key. And eventually the whole gear of the transmission Is prevented.

On the other hand, the reverse rotation prevention roller (9) is a magnetic body by the magnetic force of the permanent magnet 6 is pulled toward the permanent magnet (6) so that the reverse rotation prevention roller (9) can always be located at the correct position during the reverse rotation On the other hand, the anti-rotation roller (9) closes toward the permanent magnet (6) to secure the gap between the inner race (5) and the rotating body (7) to prevent the anti-rotation roller (9) from contacting the surroundings It is possible to rotate at high speed. The permanent magnets 6 used in the embodiments described below all perform the same function.

Figure 2 (a) to (c) is a cross-sectional view of the reverse rotation prevention device according to a second embodiment of the present invention and an operation state diagram, and the difference with the first embodiment is that the locking step (4) the outer race A plurality of formed at predetermined intervals along the inner circumferential surface of (2), when the rotary shaft 3 rotates in the clockwise direction, the inner race 5 also rotates in the same direction, unlike the first embodiment, the inner and outer races The rotating body 7 and the annular fixing plate 8 and the anti-rotation roller 9 arranged between (5, 2) are caught by the locking jaw 4 so as not to rotate. On the other hand, as shown in (b) of FIG. 2, when the rotating shaft 3 rotates counterclockwise, the reverse rotation prevention roller 9 moves toward the top of the locking jaw 4 as in the first embodiment. By acting as a key, the reverse rotation is certainly prevented.

In addition, Figure 3 (a) and (b) is a cross-sectional view showing a third embodiment of the present invention with a spring provided between the outer race and the rotating body in Figure 2, the outer race (as shown in these figures) A spring 15 made of an elastic material fixed between 2) and the rotating body 7 is provided, and the spring 15 is released when the rotating shaft 3 is freely rotated as shown in FIG. If the power is interrupted in the stationary state after the rotating shaft 3 is reversely rotated, it is automatically rotated forward by the expansion force of the spring 15 as shown in FIG. To form.

And (a) and (b) of FIG. 4 are cross-sectional views showing a fourth embodiment which is not used as a permanent magnet in the configuration shown in FIG. 1, and (a) and (b) of FIG. Fig. 5 is a cross-sectional view showing the fifth embodiment in which the permanent magnet is not used in the road configuration. As can be seen from these figures, in the state where the permanent magnets 6 are respectively removed and stopped by the latching jaw 7a protruding to form an L-shaped cross section inside or outside the pivot 7, 3) is suddenly accelerated when the rotational power is transmitted to the locking jaw (7a) by the inertia, respectively, in contact with the locking jaw (4) of the inner and outer races (5, 2), and the rotational power is transmitted, preventing reverse rotation The roller 9 prevents reverse rotation while forming an angle α, which is a clearance angle, as in the first and second embodiments described above.

(A) and (b) of FIG. 6 are sectional views showing the sixth embodiment in which the locking jaw of the pivot is removed in the configuration shown in FIG. 1, and (a) and (b) of FIG. 7 is a cross-sectional view showing a seventh embodiment in which the locking jaw of the rotating body is removed in the configuration. As can be seen in these figures, the locking jaw (7a) of the rotating body (7) is removed, the locking of the inner and outer race (5, 2), respectively, when the protruding reverse rotation prevention roller (9) transmits the rotational power In addition to contacting the jaw (4) to transmit the rotational power, the anti-rotation roller (9) forms a clearance angle α ° as in the first, second, fourth, and fifth embodiments described above. This prevents reverse rotation.

(A) and (b) of FIG. 8 are cross-sectional views showing an eighth embodiment in which the interval between the inner race and the rotating body is wider in the configuration shown in FIG. 2, which is the inner race 5 and the Even if the rotation shaft 3 rotates at a high speed during free rotation by increasing the distance K between the bodies 7, the frictional resistance is greatly reduced by the distance T between the anti-rotation roller 9 and the inner race 5. It is thus possible that the durability of itself can be greatly improved when the anti-rotation device is acting.

9 (a) and 9 (b) are cross-sectional views showing a ninth embodiment using two permanent magnets in each part of the rotating body in the configuration shown in FIG. And the distance T between the inner race 5 and the additional auxiliary permanent magnet 6a is added adjacent to the built-in permanent magnet 6 of the rotating body 7 and the power is cut off after free rotation. In the stopped state, the magnetic angle of the auxiliary permanent magnet 6a is automatically formed to make the angle α ° which is a more reliable margin, while the reverse rotation is prevented after rotating only to the angle α ° in reverse rotation.

FIG. 10 is a cross-sectional view showing a tenth embodiment in which the inner and outer races are applied as gears in the configuration shown in FIG. 1, wherein gear blades 5a and 2a are formed on the inner and outer races 5 and 2, respectively. In addition, even when the rotational power is transmitted through the medium engaged with the spline (3a) of the rotary shaft (3) coupled to the inner race 5 or meshing with the gear, as shown in the embodiments described above, While forming, it prevents reverse rotation.

11 shows an eleventh embodiment in which the distance between the engaging jaw 4 of the inner race 5 and the engaging jaw 7a of the pivoting body 7 is widened to a maximum of 90 ° while applying the outer race 2 as a gear. As shown, as in the above-described embodiments, the relief angle α ° is within the 90 ° range to prevent reverse rotation.

In addition, Figure 12 (a) and (b) of the present invention is designed to prevent the reverse rotation only in the case of sudden stop or need, but can be reversed freely by using the locking rod in the configuration shown in Figure 2 As a cross-sectional view showing a twelve embodiment, this is to use the engaging rod 12 supported by the spring 13 while being inserted and withdrawn into the engaging jaw (7a) portion of the rotating body 7 through the outer race (2). have. That is, as shown in (a) of FIG. 12, when the flow of the rotating body 7 is prevented by the locking rod 12, the anti-rotation roller 9 is stopped and the inner race 5 and the rotating shaft 3 are stopped. Forward and reverse rotation can be freely performed. However, as shown in (b) of FIG. 12, when the catching rod 12 is pulled out of the rotating body 7, the inner race 5 and the rotating shaft 3 are reversed. It only prevents reverse rotation after rotating up to α °.

FIG. 13 is a cross-sectional view showing a thirteenth embodiment in which only one locking jaw of the rotating body is formed in the configuration shown in FIG. 1. FIG. 13 shows that only one locking jaw 7a of the rotating body 7 is formed. FIG. 14 is a cross-sectional view showing a fourteenth embodiment in which only two locking jaws 7a of the pivot 7 are formed in the configuration shown in FIG. 2. In this structure, the U-shaped member is a separate locking jaw. Is inserted into the inner surface of the rotating body 7 to transmit rotational power while the U-shaped member and the inner race 5 are in contact with each other, while preventing the reverse rotation while forming a clearance angle α ° as in the above-described embodiments. This embodiment has the effect of further facilitating the manufacture of the device.

FIG. 15 shows a fifteenth embodiment in which an intrusion preventing plate is installed to prevent intrusion of foreign matters from the outside in the configuration shown in FIG. 1, and FIG. 16 shows foreign matters from the outside in the configuration shown in FIG. 16 shows a needle chip preventing plate installed to prevent an intrusion, and the protector 11 and the side plate so as to cover the back and forth around the pivot 7 between the outer race 2 and the inner race 5. 10) are respectively provided to prevent foreign substances such as iron from flowing into the permanent magnet 6 part of the pivot 7 from the outside. In this case, a crimping portion 19 is formed to fix the side plate 10 to the inner race 5 as in the case of FIG. 15 so that the side plate 10 is not separated by the rotational force, or the outer race as in the case of FIG. It is preferable that the crimping | compression-bonding part 19 fixed to (2) is formed.

(A) and (b) of FIG. 17 are sectional views showing the seventeenth embodiment in which the interior of the inner race can slide with the rotational axis in the configuration shown in FIG. 2, which is one part of the inner race 5; Is formed into a substantially triangular cross section, and is slid along the rotary shaft 3 by an external force applied by being coupled with the spline 3a of the rotary shaft 3, thereby making a reverse rotation as usual in (a) of FIG. When the accident occurs due to the reverse rotation continuously while being free, the inner race 5 is inserted as shown in FIG. 17 (b) to prevent rapid reverse rotation while preventing the reverse rotation. In this way, when releasing from the state in which the reverse rotation is prevented, it can be easily released by slightly rotating the spline 3a of the inner race 5.

(A), (b) and (c) of FIG. 18 are cross-sectional views showing an eighteenth embodiment in which two magnetic anti-rotation devices according to the present invention are placed in opposite directions for use in an escalator or a conveyor. to be. As shown in FIG. 18A, two magnetic anti-rotation preventing devices A are provided at a predetermined interval on the rotating shaft 3 on which the spline 3a is formed. A moving inner race 17 having left and right inserting portions 17a and 17b selectively inserted and detached from the periphery thereof is engaged, thereby rotating in a clockwise direction of FIG. 18B or counterclockwise rotation. As shown in the case of (c) of FIG. 18, it selectively acts and prevents reverse rotation as in the above-described embodiments, if necessary.

(A) and (b) of FIG. 19 are cross-sectional views showing the nineteenth embodiment of the present invention in which the reverse rotation is prevented when the magnetic reverse rotation prevention device according to the present invention is easily applied to the gear in a bite state in which reverse rotation is prevented. . This embodiment includes a plurality of helical input shaft gears (F), helical transmission gears (G), flat car idling gears (H), and flat car output shafts so as to receive power by a rotating body (E), such as a transmission of an automobile or a motorcycle. Magnetic reverse rotation prevention device (A) is provided at the portion composed of gear (I), and the internal and external races (5, 2) and reverse rotation prevention of reverse rotation prevention device (A) as shown in FIG. When the roller 9 is operated in a neutral state, the helical gears F and G can easily release the state in which reverse rotation is prevented as shown in FIG. 19 (b). When the helical transmission gear G is engaged with the helical input shaft gear F as shown in (a) of FIG. 19, it is possible to prevent the vehicle or the like from being reversed when starting again after stopping at an uphill road.

(A), (b) and (c) of FIG. 20 show a twentieth embodiment in which the magnetic backlash prevention device of the present invention is used for the starting motor, which is similar to the starting motor (b) of FIG. (B) of FIG. 20 with a Bendix gear 18 coupled with a rotary spline 16 of D) and with a magnetic backlash preventing device A having an inner surface of the outer race 2 as shown in FIG. Or the magnetic switch and lever used in the conventional apparatus, such as in FIG. 20 (c) having a circular magnetic reverse rotation preventing device (A) having a circular outer surface as shown in FIG. Complex configurations such as these can be greatly simplified to achieve the same performance while significantly reducing weight.

Therefore, the reverse rotation prevention device according to the present invention is prevented further reverse rotation after the reverse rotation by α °, if the reverse load is applied to the transmission or the driven body effectively prevents the reverse rotation without overwhelming the whole device In particular, it is possible to apply to all kinds of gears, especially motorcycles, vehicles, or lathes, and the like. In free rotation, no matter how high-speed rotation, there is no friction, and noise and frictional heat are not generated. The magnitude | size of a clearance angle ((alpha)) can be suitably changed as needed.

According to the magnetic reverse rotation prevention device according to the present invention as described above, the rotating shaft is mounted between the inner and outer race, the rotating body fixed plate coupled with the permanent magnet and the rotating body receives the power from the engine power transmission In addition to being able to rotate smoothly in the direction, the reverse rotation can be achieved by only rotating by α ° in the reverse direction. On the other hand, when the gear coupled to the rotational shaft and the gear for the pitch-engagement meshes with the gear, the rotational shaft can be freely rotated within the range α ° in the reverse rotation direction, so that the gear and the gear for the pitch-matching gear easily fit together. In particular, when it is used as a starting motor, when the starting motor does not operate, the motor rotates forward as usual, but when the starting motor is operated, reverse rotation is prevented and it can be stopped by being engaged with the gear. Will be.

Claims (10)

An anti-rotation roller 9 is provided between the outer race 2 fixed to the support plate 1 and the inner race 5 fixed to the rotating shaft 3, and the outer circumferential surface or outer race of the inner race 5 A plurality of locking jaws (4) are formed at any one of the inner peripheral surface of 2) at predetermined intervals, and the plurality of L-shaped cross sections having permanent magnets (6) mounted between the inner and outer races (5, 2). The rotating body (7) is installed to engage the respective locking jaw (4) at predetermined intervals, and between the rotating body (7) and the annular fixing plate (8) for supporting these rotating body (7) and the reverse rotation prevention roller In the magnetic reverse rotation preventing device for preventing the reverse rotation of the rotating shaft (3) by arranging (9), respectively, wherein the outer race (2) is a gear blade (2a, 5a) on the outer circumferential surface or the inner circumferential surface of the inner race (5) In addition, the clearance angle α ° between the locking jaw 4 of the inner and outer races 5 and 2 and the locking jaw 7a of the pivot 7 is up to 90 °. Magnetic anti-reverse device, characterized in that the to be open. 2. The magnetic reverse rotation prevention device according to claim 1, wherein an elastic spring (15) is provided between the outer race (2) and the pivot (7). The inner and outer races (5, 2) are geared to the splines (3a) of the rotary shaft (3) to which the gear blades (5a, 2a) are coupled to the inner race (5). Magnetic reverse rotation prevention device characterized in that the. The rotating body (7) according to claim 1, wherein the rotating body (7) is supported by a locking rod (12) supported by a spring (13) inserted and withdrawn from the locking jaw (7a) portion of the rotating body (7) through the outer race (2). Magnetic rotation is characterized in that the rotating shaft (3) is freely rotated and the spring (13) is compressed to prevent the reverse rotation when the locking rod (12) is withdrawn from the rotating body (7). Prevention device. According to claim 1, wherein one or two locking jaws (7a) is formed in the rotating body (7), while the U-shaped member is inserted into the inner surface of the rotating body (7) to the inside of the locking jaw (7a) Magnetic anti-rotation device, characterized in that the locking jaw (4) of the race (5) is in contact to transmit the rotational power. The rotating body (7) according to claim 1, wherein a protector (11) and a side plate (10) are respectively provided to cover portions of the rotating body (7) back and forth between the outer race (2) and the inner race (5). In addition to preventing foreign matter from entering around the permanent magnet 6 therein, the compression section 9 for preventing the side plate 10 from being separated by the rotational force has an inner race 5 or an outer race 2. Magnetic reverse rotation prevention device characterized in that formed on. 2. The inner race (5) according to claim 1, wherein one part of the inner race (5) is formed in a substantially triangular cross-section, and is coupled with the spline (3a) of the rotating shaft (3) so as to slide along the rotating shaft (3) when an external force is applied. Magnetic reverse rotation prevention device characterized in that. 2. A moving inner race (17) according to claim 1, further comprising a left and right inserting opening (17a, 17b) for selectively inserting and detaching around the rotating body (7) to form a predetermined interval on the rotating shaft (3). Magnetic reverse rotation prevention device, characterized in that to be selectively acted when rotated clockwise or counterclockwise. The helical input shaft gear (F) and the plurality of helical input shaft gear for transmitting power by the rotating body (E) in the state that the inner and outer race (5, 2) and the anti-rotation roller (9) is bite Is mounted on a transmission of an engine composed of a helical transmission gear (G), a flat gear idling gear (H), and a flat gear output shaft gear (I), and reverse rotation by the helical gears (F, G) when operated in neutral. Magnetic reverse rotation prevention device, characterized in that the prevention state can be easily released. According to claim 1, wherein the inner surface of the outer race (2) or the outer surface of the inner race (5) is formed in a circular shape and mounted on the Bendix gear (18) coupled with the rotary spline (16) of the starting motor (D) When the starter motor (D) has a rotational force, the rotation of the starter motor (D) when the power is cut off, the bends gear (18) free rotation, characterized in that the reverse rotation prevention device to prevent the reverse rotation.