KR100409175B1 - One-way clutch - Google Patents

Abstract

One-way clutch according to the present invention is composed of a main body having an inner ring and an outer ring fitted to the rotary shaft of the drive device, and a cover portion inserted into the main body, a recess is formed in the main body is inserted into the roller and the elastic member.

According to the configuration of the present invention, the recess is formed in a narrow portion and a wide portion, the elastic member may be used one or two according to the torque force, it can be used in the spring or roller type.

In addition, the main body may have a coupling protrusion, and the cover may be attached or detached, or the main body may be formed to be blocked except for a hollow part in which a cover is fitted to one side of the main body and a hollow shaft into which the rotation shaft is inserted. According to the present invention, the one-way clutch is inexpensive in manufacturing cost and can prevent the detachment of the roller when changing the transmission direction of the rotational torque.

Description

One-way clutch

The present invention relates to a one-way clutch, and more particularly, by improving the arrangement of the roller and the elastic member for deflecting the roller, and having a cover or a cover with a roller support detachable to the main body, manufacturing is simplified and manufacturing cost is reduced. The present invention relates to a one-way clutch that prevents the roller from being separated when the reverse direction of the rotational torque is to be reversed, and does not cause backlash.

One-way clutch is a shaft joint that transmits rotational torque in only one direction and is widely used as a core part in various types of driving devices such as automobiles, aircrafts, office equipment, and industrial machinery. . The one-way clutch performs a function of changing the reciprocating rotational movement to an intermittent rotational movement in the predetermined direction, preventing the reversal, or preventing the circumference in the driving device.

There are various types of one-way clutches having such a function, among which roller-type one-way clutches typically use inner and outer races, and rollers and rollers interposed therebetween. It consists of a spring etc. which support deflection.

However, the roller-type one-way clutch according to the prior art has a high manufacturing cost because it is difficult to shape the outer circumferential surface of the outer ring that accommodates and supports the roller, and the roller is easy to replace the one-way roller in order to reverse the transfer direction of the rotational torque. There was a problem such as leaving. In addition, in the roller type one-way clutch according to the prior art, there is a problem that a backlash occurs due to the roller coming off the inner ring in the free state and contacting the rotating shaft of the driving apparatus.

For example, U.S. Patent No. 4,770,279 discloses a roller type one-way clutch. In this patent, the plate member corresponding to the clutch cover has a roller receiving portion made of a plurality of magnetic materials, so that the positioning of the roller using the magnetic force of the receiving portion. And a position movement. Therefore, in this patent, since the roller receiving portion is made of only a magnetic material, it is difficult to couple to the plate member, and it is inexpensive to be integrated with the plate member. In addition, since the roller is also made of metal, there is no elastic member that can reduce the frictional force between the magnetic material forming the receiving portion and the outer ring, so that the roller is easily worn, and thus its effect is also questionable.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to improve the arrangement structure of the roller and the elastic member for supporting the roller deflection, and to provide a removable cover to the main body, the production is simple The manufacturing cost is reduced, it is possible to prevent the roller from being separated when trying to reverse the transmission direction of the rotational torque, and to provide a one-way clutch that does not occur backlash phenomenon.

Another object of the present invention is to accommodate the roller and the outer peripheral surface formed in the main body is parallel to the virtual center line connecting the center of the body and the recess outer surface of the main body in which the elastic member is accommodated thicker than the other surface wear To prevent, and to provide a support for supporting the roller and the elastic member in the cover to provide a one-way clutch easy to detach and assembly.

1A and 1B are views illustrating a main body and a cover of a one-way clutch according to one embodiment of the present invention.

2a and 2b is an operational state diagram of the one-way clutch according to the above embodiment of the present invention.

Figure 3 is an exploded perspective view of a one-way clutch according to another embodiment of the present invention.

Figure 4 is a front sectional view of the present invention one-way clutch assembly of Figure 3,

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

<Explanation of symbols for main parts of drawing>

10: one-way clutch 11: inner race

12 main body 13 outer race

14: recess 14a: wide recess portion

14b: narrow recess portion 15: engaging projection

17: thick portion 18: recess

20: cover 21: coupling hole

22 plate 23 support

30: roller 31, 32: elastic member

In order to achieve the above object, the present invention,

An inner race and an outer race to which the rotation shaft of the driving device is fitted, and a plurality of recesses are formed in the form of a blocking hole between the inner race and the outer race, and adjacent to the recess on one side. The position includes a hollow body formed by protruding the engaging projection by a predetermined length;

The cover has a shape corresponding to the outer shape of the main body, the cover is formed detachably mounted on one side of the main body, a plurality of coupling holes corresponding to the engaging projection to accommodate the engaging projection when mounted on one side of the main body ;

A roller inserted into and mounted in the recess; And

It is disposed in the recess adjacent to the roller, and provides a one-way clutch, characterized in that it comprises a plurality of elastic members for elastically deflecting support the roller.

The recess is formed by cutting in a form extending from the inner ring toward the outer ring so as to communicate with the inner ring, and having a wide recess portion and a narrow recess portion. A first elastic member of the elastic member is disposed in the wide recess portion, and a second elastic member is disposed in the narrow recess portion, wherein the first elastic member is larger in size than the second elastic member. The roller is disposed in the recess between the first elastic member and the second elastic member, wherein the first elastic member biases and supports the roller by pushing the roller toward the second elastic member. The elastic member biases and supports the roller by pushing the roller toward the first elastic member.

In this case, the elastic member is preferably a member having a roll or a spring with elasticity.

The present invention to achieve another object of the present invention;

A hollow body composed of a wide part and a narrow part having a plurality of recesses for accommodating the rollers,

A cover fitted with the main body and having a plurality of roller supports for supporting the rollers;

Provided is a one-way clutch composed of a plurality of elastic members accommodated in the narrow portion of the main body and supported by the support of the cover.

Here, the outer surface of the main body outside the recess of the narrow portion of the plurality of recesses of the hollow body is preferably made thicker than the other surface to accommodate the pushing force of the roller and the elastic member.

In addition, it is preferable that the virtual center line of the hollow body and the recess outer surface on the hollow body form a recess to be parallel so that the movement of the roller according to the rotation of the rotating shaft becomes parallel.

In addition, the cover with the roller support is preferably made of plastic integrally, one side of the hollow body is opposed to the cover and the other side is inserted into the cover is formed by forming a concave plastic cover is inserted into the hollow after being inserted The hollow body is preferably made of metal, such as the other surface of the main body.

In addition, the elastic member is an elastic roller type, the roller is preferably made of metal.

As described above, the one-way clutch according to the present invention has a simple internal structure, thereby reducing manufacturing costs, and only changing the insertion direction of the one-way clutch with respect to the rotation shaft without opening the cover when the reverse direction of the transmission of the rotation torque is reversed. Since it is necessary to provide a separation problem and the occurrence of backlash phenomenon of the roller which was a problem in the conventional one-way clutch can be prevented. In addition, only two or one elastic member can be used depending on the size of the torque.

Hereinafter, a one-way clutch according to the present invention will be described in detail with reference to the accompanying drawings.

The one-way clutch 10 according to the first embodiment of the present invention includes a hollow body 12 and a cover 20 detachably mounted on one side of the body 12.

The main body 12 includes an inner race 11 and an outer race 13 to which the rotation shaft A of the drive device is fitted when the one-way clutch 10 according to the present invention is disposed in the drive device. Equipped.

A plurality of recesses 14 are formed in the form of a blocking hole between the inner ring 11 and the outer ring 13. At this time, the recess 14 is formed by cutting in a form extending from the inner ring 11 toward the outer ring 13, and as shown in the drawing, the wide recessed portion 14a formed by making a large cut to the left and a small cut to the right And a narrow recess portion 14b formed. The recess 14 thus configured is in communication with the inner ring 11. Coupling protrusions 15 are formed at adjacent positions of the recesses 14, respectively. Coupling protrusion 15 is formed to protrude a predetermined length to the outside on one side of the main body 12.

The pin-shaped first spring or elastic roller member 31 is disposed in the wide recess portion 14a, and the pin-shaped second spring or elastic roller member 32 is disposed in the narrow recess portion 14b. The first spring 31 is larger in size than the second spring 32. The roller 30 is disposed in the recess 14 between the first spring 31 and the second spring 32. At this time, the radial left and right widths, that is, the diameters of the rollers 30 inserted into the recesses 14 are larger than the lower width W of the recesses 14 communicating with the inner edge 11 of the main body 12. Thus, the roller 30 once inserted into the recess 14 never leaves below the recess 14.

The first spring 31, the second spring 32, and the roller 30 are inserted in a direction parallel to the inner ring 11 and the outer ring 13 of the main body 12. The first spring 31 and the second spring 32 deflect and support the rollers 30 disposed therebetween, the first springs 31 pushing the rollers 30 toward the second springs 32. Deflective support and the second spring 32 deflectively support the roller 30 by pushing it toward the first spring 31. More specifically, the first spring 31 serves to facilitate the operation of the roller 30 and serves as a guide for preventing the roller 30 from being separated in the direction of the central axis of the roller 30. The second spring 32 simultaneously serves as a spring to prevent the roller 30 from being separated in the central axis direction and to return.

The cover 20 is formed in the center through a central opening 22 having the same diameter as the inner ring 11 of the main body 12. Thus, the cover 20 has an annular shape. A plurality of coupling holes 21 penetrate through the radially outer side of the central opening 22. When the cover 20 is coupled to one side of the main body 12, the coupling protrusion 15 is inserted into the coupling hole 21.

Hereinafter will be described the operation of the one-way clutch 10 according to the present invention configured as described above.

In a state in which the rotary shaft A of the drive unit is inserted into the drive unit in the manner of inserting the rotary shaft A of the drive unit into the inner ring 11 of the one-way clutch 10, as shown by the arrow in FIG. 2A. When rotating clockwise, the roller 30 disposed in the recess 14 is moved in the horizontal direction parallel to the imaginary central horizontal line CL connecting the center of the main body 12 to the right side of the drawing. .

That is, since the roller 30 moves toward the narrow recess portion 14b, the radial bottom surface of the roller 30 comes into close contact with the outer surface of the rotation shaft A through the open lower portion of the recess 14. Thereby, a frictional force acts between the roller 30 and the rotating shaft A, and thereby the clockwise rotation of the rotating shaft A is prevented. As a result, the clockwise rotation of the rotation shaft A is prevented by the horizontal force applied to the roller 30 toward the second spring 32.

On the contrary, when the rotation axis A is to be rotated counterclockwise as indicated by the arrow in FIG. 2B, the roller 30 is parallel to the imaginary central horizontal line CL connecting the center of the main body 12. In the horizontal direction, it moves to the left side of the drawing.

That is, since the roller 30 moves toward the wide recess portion 14a, the radial bottom surface of the roller 30 is spaced apart from the outer surface of the rotation axis A. As shown in FIG. Therefore, the roller 30 is in a free state, and the roller 30 and the rotating shaft A do not come into contact with each other, whereby the rotating shaft A is counterclockwise without being disturbed by the roller 30. Direction of rotation.

One-way clutch 10 according to the present invention through the operation as mentioned above is to transmit the rotational torque of the rotation shaft (A) of the drive device in only one direction.

If the rotation direction of the rotation shaft A is to be changed, the one-way clutch 10 fitted to the rotation shaft A may be removed, and the insertion direction of the one-way clutch 10 may be reversed. At this time, since the roller 30 in the recess 14 has a diameter larger than the lower width W of the recess 14 in communication with the inner edge 11 of the main body 12, the lower portion of the recess 14 Never deviate in the axial direction of the roller 30 through. In addition, the first spring 31 and the second spring 32 further support the roller 30 so as not to deviate in the axial direction. Therefore, there is no fear of losing the roller 30 when inserting by changing the insertion direction of the one-way clutch 10.

The one-way clutch 10 according to the second embodiment of the present invention has a plurality of recesses, one side of which is closed, leaving only a hollow into which a rotation shaft is inserted, and having a wide recess portion 14a and a narrow recess portion 14b therein. 14 is formed and the other side is composed of a main body 12 which is open so that the cover 20 coupled to the plurality of roller supports 23 can be inserted.

In addition, the second embodiment of the present invention is provided with a plurality of cylindrical metal rollers 30 and roller-shaped elastic member 31, the roller 30 is in the center of the recess 14, the elastic member 31 Is located on the side of the narrow recess 14b. Here, the elastic member 31 has a cylindrical shape that is substantially the same length as the roller 30.

In addition, the plate 22 of the cover 20 is inserted into and fixed to the inner side of the opening side in which the cover 20 with the roller support 23 is fitted in the hollow body 12. Since the concave portion 18 is formed as thick as the cover 20 is fitted to the main body 12, there is a sense of stability in appearance.

In addition, the recess 14 of the hollow body 12 causes the virtual centerline CL of the hollow body 12 to be parallel to the outer surface X of the recess 14 such that the roller 30 is recessed 14. Since the parallel motion with the central axis in the) centrifugal force is not applied to the roller 30 is less wear.

Since the narrow recess 14b portion of the outer surface of the hollow body 12 is formed closer to the outside, the outer surface is thicker than the other surface, so that the surface of the hollow body 12 receives the force transmitted from the roller 30 and the elastic member 31 to the outside. The same can be accommodated.

Since the effect according to the second embodiment of the present invention configured as described above is the same as in the first embodiment, the effect is omitted.

As mentioned above, the one-way clutch 10 according to the present invention has a first spring 31 and a second spring 32 having different sizes between the inner ring 11 and the outer ring 13 of the main body 12. One side of the main body 12, forming recessed portions 14a and 14b of different sizes so as to accommodate the rollers 20 and 22, which are deflected and supported by the springs 31 and 32. By attaching the cover 20 in a detachable manner, the rotational torque of the rotation shaft (A) is transmitted only in one direction, and the internal structure is simple, thereby reducing the manufacturing cost.

In addition, to reverse the transmission direction of the rotation torque, it is not necessary to loosen the cover 20, only the insertion direction of the one-way clutch 10 with respect to the rotation shaft is to be changed, and at this time, the first spring 31 and the second spring 32 Since the separation of the roller 30 in the axial direction can be prevented, it is possible to prevent the separation of the roller 30, which is a problem in the conventional one-way clutch, and prevent the occurrence of a backlash phenomenon.

In addition, the one-way clutch 10 according to the present invention can accommodate the force received by making the outside of the narrow recessed portion 14b of the outside of the body 12 thicker than the other surface, and the virtual center line CL of the body 12 and Since the outer surfaces of the recesses 14 are parallel to each other, the axial rotational motion and the movement of the rollers 30 are always parallel so that durability can be maintained. It has a stable effect.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated.

Claims (10)

An inner race 11 and an outer race 13 to which the rotation shaft A of the drive device is fitted, and a plurality of recesses 14 between the inner race 11 and the outer race 13. ) Is formed in the form of a blocking hole, the hollow body 12 is formed by protruding the engaging projection 15 by a predetermined length in the adjacent position of the recess 14 on one side; Removably mounted to one side of the main body 12, a plurality of engaging holes 21 corresponding to the engaging projection 15 to receive the engaging projection 15 when mounted on one side of the main body 12 An annular cover 20 formed therethrough and having a central opening 22 having a diameter the same as that of the inner ring 11; A roller 30 inserted into the recess 14 to be mounted; And A one-way clutch disposed in the recess 14 adjacent to the roller 30 and including a plurality of support springs 31 and 32 for elastically deflecting and supporting the roller 30. . The method of claim 1, wherein the recess 14 is formed by cutting in a form extending from the inner ring 11 toward the outer ring 13 to communicate with the inner ring 11, and the wide recess portion 14a and Having a narrow recessed portion 14b, the diameter of the roller 30 being larger than the lower width W of the recess 14 in communication with the inner ring 11 of the body 12. The roller (30) inserted into the recess (14) is characterized in that it does not escape through the open lower portion of the recess (14). 3. The first and second springs 31 and 32 are disposed in the wide recess portion 14a, and the second spring 32 is disposed in the narrow recess portion 14b. In this case, the first spring 31 is larger than the second spring 32, and the roller is disposed in the recess 14 between the first spring 31 and the second spring 32. 30, the first spring 31, the second spring 32, and the roller 30 are parallel to the inner ring 11 and the outer ring 13 of the main body 12. The first spring 31 biases the roller 30 toward the second spring 32 and the second spring 32 supports the roller 30. One-way clutch, characterized in that for supporting the deflection by pushing toward the spring (31). 4. The rotating shaft A according to claim 3, wherein the rotating shaft A is disposed clockwise in a state in which the rotating shaft A of the driving device is inserted into the inner ring 11 of the one-way clutch. When rotating, the roller 30 disposed in the recess 14 moves horizontally to the right in parallel with respect to an imaginary central horizontal line CL connecting the center of the main body 12, wherein the roller ( The radial lower surface of 30 is in intimate contact with the outer surface of the rotary shaft A through the open lower portion of the recess 14, whereby a friction force acts between the roller 30 and the rotary shaft A, thereby Clockwise rotation of the rotating shaft A is prevented, and on the contrary, when the rotating shaft A is to be rotated counterclockwise, the roller 30 has an imaginary central horizontal line connecting the center of the main body 12 ( Evaluation on CL) In order to move to the left side in the horizontal direction, the radial bottom surface of the roller 30 is spaced apart from the outer surface of the rotating shaft (A), so that the roller 30 is in a free state, the roller 30 and the The rotating shaft (A) is not in contact with each other, whereby the rotating shaft (A) is rotated counterclockwise without being disturbed by the roller (30). An inner ring 11 and an outer ring 13 fitted to the rotation shaft A of the drive device, and a wide recess 14a and a narrow recess 14b between the inner ring 11 and the outer ring 13. The outer surface of the outer ring side portion (X) has a plurality of recesses 14 formed in parallel with the rotation axis center (CL), one side is composed of a block outside the hollow in which the rotation shaft (A) is inserted and the other The hollow body 12 is open to the side, A cover 20 which can be attached and detached toward the opening of the main body 12, and comprises a plurality of roller supports 23 and a plate 22 fitted to the main body 12; One-way clincher, characterized in that composed of a plurality of metal rollers (30) and elastic members (31) inserted into the recess (14). The method of claim 5, The hollow body 12 is a one-way clincher, characterized in that the metal and the cover 20 is made of plastic. The method of claim 5, The roller support 23 and the plate 22 of the cover 20 is one-way clincher characterized in that the one-piece. The one-way crunch according to claim 5 or 6, wherein the hollow body (12) has an outer surface (17) corresponding to a narrow recess (14b) formed therein, which is thicker than the other surface. The method of claim 8, One-way crunch, characterized in that the hollow portion 12 is formed in the recess portion 18 to the inside of the thickness of the plate 22 so that the plate 22 of the cover 20 is fitted to fit snugly. The method of claim 5, The elastic member 31 is a one-way clincher, characterized in that the roller type with elasticity.