KR20180112598A - lightweight coupling for marine leisure - Google Patents

Abstract

The present invention provides a lightweight coupling for a marine leisure, which has a lightweight with improved power transmission performance and which is interposed between a driving shaft and a driven shaft so that power provided from the driving shaft is transmitted to the driven shaft. The light weight coupling includes: a first connecting portion integrally rotated with a driving shaft inserted into a first shaft insertion hole formed at a central portion in an axial direction and including a plurality of first rib projections formed at one side and spaced apart from each other at a predetermined angle along a circumferential direction; a second connecting portion disposed while facing the first connecting portion, integrally rotated with a driven shaft inserted into a second shaft insertion hole formed at a central portion in an axial direction, and including a plurality of second rib projections formed at the other side and spaced apart from each other at a predetermined angle along a circumferential direction such that the second rib projections can be disposed alternately with the first rib projections when the second connecting portion is coupled with the first connecting portion; and an elastic member having a center portion into which ends of the driving shaft and the driven shaft are inserted, in which a plurality of coupling protrusions, which are spaced apart from each other at a predetermined angle along a circumferential direction, protrude radially outward from an outer periphery of the elastic member and the elastic member is interposed between the first connecting portion and the second connecting portion such that the first and second rib projections are alternately inserted between the coupling protrusions along the circumferential direction.

Description

Lightweight coupling for marine leisure

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight coupling for marine leisure, and more particularly, to a marine leisure light coupling having a lightweight structure and improved structure to improve power transmission performance.

Generally, coupling is a type of power transmission device, which is a mechanical part that is provided with two rotatable mutually engaged rotors and is coupled to two mutually separated rotational shafts to transmit power.

More specifically, the coupling mainly includes a drive shaft connected to the motor side for generating rotational power and a drive shaft for transmitting rotational power from the drive shaft to a drive device, so that power can be transmitted from the drive shaft to the driven shaft have.

The coupling is designed to have a characteristic capable of reducing vibrations or shocks that may occur on the connecting structure connecting the two shafts and the structure and material, the intended use, the shaft coupling structure, the coupling direction, It is manufactured and used in various formats. Here, when the power source and the driving device are separated from each other, the coupling may be coupled to each rotating body through a shaft that transmits power, so that the rotational driving force of the power source may be transmitted to the driving device.

At this time, the shaft may be provided in two to three such as an input shaft connected to a power source in a small vehicle or a ship, an output shaft connected to the drive device, and a connection shaft connecting the shafts. To 50 < / RTI >

Meanwhile, each of the shafts is preferably provided in a straight line along the direction of the axis of rotation, but unavoidable misalignment occurs in the connecting portion between the shafts due to manufacturing limitations or deformation in use.

However, when minute misalignment occurs in the shaft, when the rotational force of the power source is transmitted through the shaft, an impact is generated due to vibration, abnormal operation, etc., and the impact is transmitted along the shaft to the power source or the drive device, .

Further, since the coupling is required to have a high rigidity at the joint portion with each shaft and is mainly formed of ferrous metal, the rotating body has a large weight, requiring a large torque at the time of initial driving, The initial driving load and the power consumption of the motor are increased. Particularly, in the coupling used in the marine leisure industry, it is required to reduce the weight of the rotating body for reducing the driving power so that the initial driving load and the power consumption of the motor are reduced.

Korean Patent Publication No. 10-2001-0028033

In order to solve the above-mentioned problems, the present invention provides a lightweight coupling for marine leisure having a lightweight structure and improved power transmission performance.

According to an aspect of the present invention, there is provided a lightweight coupling for a marine leisure interposed between a drive shaft and a slave shaft so that power provided from a drive shaft is transmitted to a slave shaft, A first connecting portion provided on one side surface of the first driving portion and rotatable integrally with the driving shaft inserted in the shaft insertion hole, the first connecting portion having a plurality of first rib projections spaced at predetermined angles along a circumferential direction; And a second shaft inserted in a second shaft insertion hole formed in a center portion of the first shaft and facing the first connection portion, the first shaft portion being rotatable with the first shaft portion in a circumferential direction A plurality of second ribs protruding from the other side in the circumferential direction at a predetermined angle so as to be alternately arranged; And a plurality of coupling protrusions radially outwardly protruding from the outer periphery of the driving shaft and the end of the driven shaft at predetermined angles along a circumferential direction are radially outwardly protruded from the coupling protrusions, And an elastic body interposed between the first connection portion and the second connection portion such that the second rib projection is inserted alternately along the circumferential direction.

The first connection part is divided into a first base part and a first shaft part by a first slit hole extending in a circumferential direction corresponding to a predetermined angle and penetrating radially outward from the first shaft insertion hole, The first shaft engaging portion is provided with a first shaft engaging portion and a second shaft engaging portion. The first shaft engaging portion is provided with a first shaft engaging portion and a second shaft engaging portion. And the second connection portion is connected to the second base portion and the second shaft coupling portion by a second slit hole extending radially outward from the second shaft insertion hole and extending in a circumferential direction corresponding to a predetermined angle, And the fourth shaft-engaging portion is formed with a third shaft-engaging portion, and the fourth shaft-engaging portion is formed with a fourth slit- Second engaging means in a direction perpendicular to this is the preferred being signed.

At this time, the first shaft coupling portion is formed with a first diameter adjustment groove that is narrowed in width from the inner circumference of the first shaft insertion hole toward the one axial side, and the second shaft coupling portion is formed with an inner circumference It is preferable that the second diameter control groove is formed so as to be recessed toward the other side in the axial direction.

The first rib projection and the second rib projection are formed such that the width of the outer end is larger than the width of the inner end and each side connecting the outer end and the inner end is rounded toward the center, The side surface profile of the protrusion is formed to correspond to the side profiles of the first rib projection and the second rib projection and is formed at an inner circumference of the first axis insertion hole along a circumferential direction at a predetermined interval And a plurality of second non-slip projections are formed at predetermined intervals along the circumferential direction so that the outer periphery of the driven shaft is closely contacted with the inner periphery of the second shaft insertion holes.

The maximum width between the engaging protrusions may be smaller than the width of the outer ends of the first rib protrusions and the second rib protrusions. The first rib protrusions and the second rib protrusions may be formed at outer ends of the engaging protrusions, And an insertion auxiliary cutout is formed in the width direction toward the inside in the radial direction so that the second rib projection is inserted, and both side surfaces of the coupling protruding portion are formed with a contact protrusion contacting with the first rib projection and the second rib projection .

Through the above-mentioned solution, the lightweight coupling for marine leisure according to the present invention provides the following effects.

First, the first rib protrusion protruding from the first connection portion rotated integrally with the drive shaft and the second rib protrusion protruding from the second connection portion integrally rotated with the follower shaft are disposed between the first connection portion and the second connection portion, So that the durability of the product can be improved because contact and friction between the engaging protrusions are prevented.

Secondly, each of the connecting portions can be easily inserted into the driving shaft and the driven shaft by narrowing the gap between the slit holes extended in the axial direction by passing through the shaft insertion hole radially outwardly only by fastening of the fastening means, The productivity is remarkably improved because the constituent components are simplified.

Third, since the driving force and the driven shaft are uniformly acted on the inner periphery of the shaft insertion hole in accordance with the tightening of the fastening means, the vertical drag concentrated on the end portions of the plurality of non-slip projections projecting at predetermined intervals along the circumferential direction, The slip phenomenon occurring in the circumferential direction in the circumferential direction is minimized, and the efficiency of power transmission can be further improved.

Fourthly, the maximum width between the engaging projections is pressed by the pressing protrusions protruding from both sides of the first rib protrusion and the second rib protrusion when the first and second rib protrusions are inserted to narrow the gap between the insertion assisting cuts formed at the outer ends of the engaging protrusions, The first rib projection and the second rib projection are automatically corrected to correspond to the widths of the outer ends so that the adhesion between the first and second rib projections can be further improved.

Fifth, since the first connection portion and the second connection portion are formed of an aluminum material having light weight, corrosion resistance, salt resistance and durability and are formed in a light weight, the initial driving load and power consumption of the motor are reduced, The driving efficiency of the product can be remarkably improved.

1 is a perspective view of a lightweight coupling for a marine leisure according to an embodiment of the present invention;
2 is an exploded perspective view showing a lightweight coupling for a marine leisure according to an embodiment of the present invention;
3 is a side view of a lightweight coupling for a marine leisure according to an embodiment of the present invention projected.
4 is a cross-sectional view as viewed in the direction AB of Fig.
5 is a bottom plan view of a first connection of a lightweight coupling for a marine leisure according to an embodiment of the present invention.
6 is a front view of a first coupling portion of a lightweight coupling for a marine leisure according to an embodiment of the present invention.
7 is a cross-sectional exemplary view showing a modification of the first connection portion in a marine leisure light coupling according to an embodiment of the present invention.
FIG. 8A and FIG. 8B are cross-sectional exemplary views showing a modification of an elastic body in a marine leisure light coupling according to an embodiment of the present invention; FIG.

Hereinafter, a lightweight coupling for a marine leisure according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a lightweight coupling for a marine leisure according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a lightweight coupling for a marine leisure according to an embodiment of the present invention, FIG. 4 is a cross-sectional view of the lightweight coupling for a marine leisure according to an embodiment of the present invention, and FIG. 5 is a cross- FIG. 6 is a front view showing a first connection portion of a lightweight coupling for a marine leisure according to an embodiment of the present invention. FIG.

1 to 6, a lightweight coupling 100 for marine leisure according to an embodiment of the present invention includes a first connection part 10, a second connection part 20, and an elastic body 30 do.

The lightweight coupling 100 for a marine leisure is interposed between a drive shaft DS1 and a driven shaft DS2 so that the power provided from the drive shaft DS1 is transmitted to the driven shaft DS2.

In detail, the first connection part 10 may be formed in a cylindrical shape, and a first shaft insertion hole 11 is formed in a central portion so that the drive shaft DS1 is inserted. The first connection portion 10 is mounted on the drive shaft DS1 inserted into the first shaft insertion hole 11 by the first fastening means 19a and is rotated integrally with the drive shaft DS1 do.

A plurality of first rib protrusions 12 protrude from one side of the first connection part 10. Here, one side of the first connection part 10 is preferably an inner side facing the driven shaft DS2. That is, one direction is preferably understood as a direction from the drive shaft DS1 to the driven shaft DS2, and the other direction is understood as a direction from the driven shaft DS2 to the drive shaft DS1.

Specifically, the plurality of first rib projections 12 are spaced from each other at a predetermined angle along a circumferential direction on one side of the first connection portion 10, and extend in the axial direction from one side of the first connection portion 10 . The plurality of first rib projections 12 may be integrally formed with the first connection portion 10 so as to have durability corresponding to clockwise and counterclockwise rotational forces of the drive shaft DS1.

Here, it is preferable that the width w1 of the outer end of the first rib projection 12 is formed to be larger than the width w2 of the inner end. That is, the first rib projection 12 may be formed in a shape of a sectional profile in which the outer end is larger than the inner end. Further, it is preferable that each side surface 12a connecting the outer end and the inner end of the first rib projection 12 is rounded toward the center. That is, the side surface 12a of the first rib projection 12 may be concave.

Accordingly, since the weight of the first rib protrusion 12 increases toward the radially outward side, the center of gravity of the first rib protrusion 12 is set to be adjacent to the outer end side to minimize the loss of power transmitted by the rotational force of the drive shaft DS1 The efficiency of power transmission can be improved.

The side surface 12a of the first rib projection 12 is rounded toward the center so that the engaging protrusion 32 described later is pressed against the inner side of the radial eave in accordance with the centrifugal force generated when the driving shaft DS1 rotates. So that the adhesion between each other can be further improved.

The second coupling portion 20 is disposed to face the first coupling portion 10 and the second coupling shaft 29a is inserted into the second shaft insertion hole 21 formed at the center of the second coupling portion 20, . Accordingly, the second connection portion 20 can be rotated integrally with the driven shaft DS2.

At this time, the second rib protrusion 22 protrudes from the other side surface of the second connection part 20. Specifically, the second rib projection 22 is spaced apart from the other side surface of the second connection portion 20 at a predetermined angle in the circumferential direction, and protrudes axially from the other side surface of the second connection portion 20. [ The plurality of second rib projections 12 may be integrally formed with the second connection portion 20. [

The second rib projections 22 may be formed so as to alternate with the first rib projections 12 along the circumferential direction when the first ribs 22 are molded with the first connection portions 10. The elastic body 30 can be interposed between the first connection part 10 and the second connection part 20 and the first rib protrusion 12 and the second rib protrusion 22 adjacent to each other in the circumferential direction The engaging protrusion 32 described later can be inserted.

Here, the second rib projection 22 has the same structure as the first rib projection 12 described above, and a detailed description of the structure of the second rib projection 22 will be omitted.

The first connection part 10 and the second connection part 20 are preferably made of aluminum having light weight, corrosion resistance, salt resistance and durability. Accordingly, since the weight of the marine leisure light coupling 100 is minimized and light weight is formed, the initial driving load and the power consumption of the motor are reduced, and propulsion power can be reduced, so that the driving efficiency of the product can be remarkably improved have.

The first rib projection 12 and the second rib projection 22 may be provided with axial alignment protrusions. At this time, the axial alignment protrusion may protrude axially from the end where the first rib projection (12) and the second rib projection (22) face. The alignment insertion groove may be formed in one side surface of the first connection portion 10 and the other side surface of the second connection portion 20 so that the axis alignment protrusion is inserted. As a result, when the first and second connecting portions 10 and 20 are formed, the first and second connecting portions 10 and 20 can be automatically aligned The assembly convenience can be improved, and these modifications fall within the scope of the present invention.

The elastic body 30 is interposed between the first connection portion 10 and the second connection portion 20 and includes the elastic body portion 31 and the plurality of coupling protrusions 32. The elastic body 30 is preferably made of an elastic material having a lower hardness than that of the first connection part 10 and the second connection part 20 and excellent in rebound resilience. The elastic body 30 may be made of urethane rubber, nitrile butadiene rubber And the like.

Specifically, the elastic body 31 has a second coaxial insertion slot 31b formed on one side thereof and a first coaxial slot 31a formed on the other side thereof.

At this time, one side of the elastic body 31 faces the other side of the second connection part 20, and when the components are coupled, the elastic body 31 is inserted from the second shaft insertion hole 21, The end of the follower shaft DS2 protruding with a predetermined length toward one side of the driven shaft DS2 is inserted. The other side surface of the elastic body portion 31 is disposed to face the one side surface of the first connection portion 10 so that the elastic body portion 31 And the end of the drive shaft DS1 protruding with a predetermined length toward the other side is inserted.

At this time, the coaxial insertion grooves 31a and 31b may be formed such that the rim is inclined inwardly in the radial direction so that the diameter becomes smaller toward the axial direction. As a result, the driving shaft DS1 and the driven shaft DS2 are separated as they are inserted into the respective coaxial insertion grooves 31a and 31b, thereby preventing contact between the driving shaft DS1 and the driven shaft DS2. Even if vibration occurs at the ends of the drive shaft DS1 and the driven shaft DS2, the rims of the coaxial insertion grooves 31a and 31b are inclined radially inwardly toward the axial direction, And the end portion of the driven shaft DS2 and the rim of the driven shaft DS2 may be damped.

Of course, a coaxial insertion hole may be formed in the central portion of the elastic body portion 31 in a widthwise direction as the case may be. The driving shaft DS1 and the driven shaft DS2 may be respectively inserted into the openings formed at both sides of the coaxial insertion hole. The driving shaft DS1 and the driven shaft DS2 may be formed on the inner circumference of the coaxial insertion hole. The coaxial locking projection may protrude radially inwardly along the inner periphery so as to prevent mutual contact.

Meanwhile, the engaging protrusion 32 protrudes radially outward from the outer circumference of the elastic body portion 31. In detail, the coupling protrusions 32 are spaced apart from each other by a predetermined angle in the circumferential direction, and are provided between the adjacent coupling protrusions 32 along the circumferential direction, and the first rib protrusions 12 and the second It is preferable that the rib projection 22 is arranged so as to be inserted.

That is, the maximum width between the engaging protrusions 32 neighboring along the circumferential direction is set to correspond to the width w1 of the outer ends of the first rib protrusion 12 and the second rib protrusion 22, The minimum width is set to correspond to the width w2 of the inner ends of the first rib projection 12 and the second rib projection 22.

The profiles of the side surfaces 32b of the engaging protrusions 32 may be formed to correspond to the profiles of the side surfaces 12a and 22a of the first rib protrusion 12 and the second rib protrusion 22. Accordingly, the first rib projection 12 and the second rib projection 22 can be interlocked and stably inserted between the engaging projections 32 neighboring along the circumferential direction.

At this time, the first rib projection 12 and the second rib projection 22 are alternately inserted in the circumferential direction between the engaging projections 32 neighboring along the circumferential direction.

In other words, the first rib projection 12 and the second rib projection 22 are arranged alternately along the circumferential direction, and the engaging projection portion 32 includes the first rib projection 12 And between the second rib projections 22 or between the second rib projections 22 and the first rib projections 12, respectively.

As a result, when the first connection part 10 and the second connection part 20 are pressed in mutually opposite directions and are mutually combined, the first rib projection 12 and the second rib projection 12, The rib projections 22 are alternately inserted along the circumferential direction. As the elastic body 30 is inserted into the inner end side of the first rib protrusion 12 and the second rib protrusion 22, the elastic body 30 is inserted into the first connection portion 10 and the second connection protrusion 22, And may be interposed between the second connection portions 20.

When the first connection portion 10 is rotated by the rotational force of the drive shaft DS1, the first rib projection 12 is engaged with the coupling projection 32 and the second rib projection 22 So that the elastic body 30 and the second connection portion 20 are rotated together. That is, as the rotational force of the driving shaft DS1 is transmitted to the second rib projection 22 via the coupling protrusion 32 by the first rib projection 12, the rotational force transmitted to the driven shaft DS2 As shown in Fig.

Accordingly, the power provided from the drive shaft (DS1) can be stably transmitted to the driven shaft (DS2). Accordingly, the first rib projection 12 and the second rib projection 22 can prevent direct contact and friction between the steel parts by the engaging projections 32 and can be caused by mutual collision due to rotational force Abrasion, fatigue breakage, and the like are prevented, so that the durability of the product can be improved. Further, the engaging protrusion 32 repeatedly deforms and restores elastic deformation between the first rib protrusion 12 and the second rib protrusion 22, thereby canceling vibration or fluctuation generated in the power transmission process, The noise generated during power transmission can be reduced.

The spacing protrusion 32a may protrude axially from the coupling protrusion 32. [ Here, the spacing protrusions 32a may alternately protrude from one side surface and the other side surface of the coupling protrusions 32 adjacent to each other along the circumferential direction. That is, when the spacing projection is projected on one side of the one-side coupling projection, spacing protrusions may be formed on the other side of the other coupling projection along the circumferential direction.

This makes it possible to prevent direct contact with both side surfaces of the elastic body 30 as one side of the first connection part 10 and the other side surface of the second connection part 20 come into contact with the opposite surfaces of the spaced- . This makes it possible to prevent the abrasion of the elastic body 30 due to friction between the contact areas of the connection portions 10 and 20 and the elastic body 30 due to the rotational force of the drive shaft DS1, .

On the other hand, an engaging portion may be further provided on the rim between the engaging projections 32 adjacent to each other in the circumferential direction. The engaging projections 32 may be formed integrally with the engaging protrusions 32, or may be formed to substantially cover the rim between the engaging protrusions 32.

In this case, the carbon-molding joint portion may be formed of an elastic material having a hardness lower than that of the elastic body portion 31. In other words, the carbon-molding joint portion may be formed of an elastic material having a higher amount of elastic deformation than the elastic body portion 31. For example, if the elastic body portion 31 is formed of nitrile butadiene rubber having a hardness of about 95 Shore A, the carbon-molded joint portion may be formed of silicone rubber having a hardness of about 35 Shore A.

As a result, when the first rib protrusion 12 and the second rib protrusion 22 are inserted, the above-mentioned carbon-molded joint portion is elastically deformed to closely contact the outer surfaces of the first rib protrusion 12 and the second rib protrusion 22 . In this case, an error generated so that the rim between the engaging projections 32 and the outer surfaces of the first rib projection 12 and the second rib projection 22 are in contact with each other can be corrected by the elastic deformation of the carbon- . As a result, the first rib projection 12 and the second rib projection 22 are held in close contact with each other without any clearance between the engaging projections 32, so that the efficiency of power transmission can be improved. Are within the scope of the present invention.

Referring to FIG. 6, the first connection part 10 may be divided into a first base part 14 and a first axis coupling part 15 by a first slit hole 13. Specifically, the first slit hole 13 extends radially outward from the first shaft insertion hole 11 and extends in the circumferential direction corresponding to a predetermined angle.

At this time, the first slit hole 13 may communicate with the first shaft insertion hole 11, and the first slit hole 13 may be communicated with the first shaft insertion hole 11 in a direction orthogonal to the axial direction corresponding to the predetermined width d. The outer circumference can be formed by cutting.

Here, the predetermined width d may be set in a range of 50 to 80% of the diameter of the first connection part 10. At this time, when the predetermined width d is less than 50% of the diameter of the first connection part 10, the first split coupling part 15a and the second split coupling part 15b to be described later are not elastically deformed smoothly The fixing force to the drive shaft DS1 may be lowered. When the predetermined width d is more than 80% of the diameter of the first connection part 10, when the first split coupling part 15a and the second split coupling part 15b are elastically deformed, 1 end portion connected to the base portion 14 may be broken.

One end of each end portion divided by the first slit hole 13 may be provided as the first base portion 14 and the other end portion may be provided as the first axis coupling portion 15. Here, the first connection portion 10 has a portion of the outer circumference corresponding to a substantially predetermined angle opened by the first slit hole 13, and the remaining portion is connected to the first base portion 14 and the first axis 12, And the engaging portions 15 are integrally connected. The first base portion 14 has a first rib projection 12 on one side thereof and a first shaft insertion hole 11 formed in a central portion thereof.

In addition, a third slit hole 16 may be formed in the first shaft coupling portion 15. Specifically, the third slit hole (16) extends radially outward from the inner periphery of the first shaft insertion hole (11) and extends axially in the axial direction. Here, the third slit hole 16 may communicate with the first shaft insertion hole 11 and the first slit hole 13.

That is, the first shaft engaging part 15 can be cut so that the outer circumferential side is opened by the third slit hole 16. The ends of the first shaft engaging part 15 cut by the third slit hole 16 can be divided into the first split engaging part 15a and the second split engaging part 15b, have.

At this time, the first split coupling portion 15a may be formed with a coupling communication hole 18b from the outer circumference in a direction orthogonal to the third slit hole 16. The second split coupling portion 15b may have a fastening insertion hole 18a formed therethrough in a direction orthogonal to the third slit hole 16 corresponding to the position of the fastening communication hole 18b have. Here, the fastening insertion hole 18a and the fastening communication hole 18b may communicate with the third slit hole 16.

The first fastening means 19a may be inserted into the fastening insertion hole 18a and the fastening communication hole 18b to be fastened. At this time, the first fastening means 19a may be formed of a bolt or the like, and a thread is formed on the inner circumference of at least one of the fastening insertion hole 18a and the fastening communication hole 18b, The means 19a can be screwed. That is, the first fastening means 19a may be inserted into the fastening insertion hole 18a, inserted into the fastening communication hole 18b via the third slit hole 16, and then fastened.

The first split coupling portion 15a and the second split coupling portion 15b are elastically deformed as the first fastening means 19a is fastened and the first and second split coupling portions 15a, The outer circumference of the driving shaft DS1 inserted into the first shaft insertion hole 11 can be fixedly attached to the inner circumference of the first shaft insertion hole 11. [

That is, the drive shaft DS1 is interposed between the first split coupling portion 15a and the second split coupling portion 15b, and is engaged with the first split coupling portion 15a by the fastening force of the first coupling means 19a, (15a) and the second split coupling part (15b) is narrowed, it can be pressed and fixed firmly to the first connection part (10).

At this time, concave and convex portions that are mutually combined may be formed on the opposite edges of the third slit holes 16. [ As a result, the edges of the third slit holes 16 are intertwined with each other so that the driving force of the driving shaft DS1 The bonding state can be firmly maintained even with the rotational force.

Meanwhile, it is preferable that a first diameter adjusting groove 17 is formed in the first shaft engaging part 15. Specifically, the first diameter adjusting groove 17 is recessed radially outward from the inner periphery of the first shaft insertion hole 11. [ Here, the first diameter adjusting groove 17 may be formed so as to be narrowed toward the one side in the axial direction, that is, toward the one lateral direction from the other side of the first connecting portion 10. [ In addition, the end-side rim of the first diameter adjusting groove 17 may be rounded radially outward. The first diameter adjusting groove 17 has a length corresponding to an interval between the other side surface of the first connection portion 10 and the first shaft insertion hole 11, May be extended to a length corresponding to the direction length.

The first diameter adjusting groove 17 may be formed at a position symmetrical to the third slit hole 16 and may be formed parallel to the third slit hole 16. [

Here, the interval between the rims of the first diameter adjusting groove 17 can be narrowed by the third fastening means 19b. At this time, the third fastening means 19b is inserted into the first pressure insertion hole 17a and the first pressure communication hole 17b and is screwed.

In detail, the first pressure insertion hole 17a is formed in a direction perpendicular to the third slit hole 16 so that one side edge of the first diameter adjustment groove 17 is opened from the outer circumference of the first connection portion 10 Respectively.

The first pressure communication hole 17b is formed so that the other edge of the first diameter adjustment groove 17 extends from the outer periphery of the first connection portion 10 in correspondence with the position of the first pressure insertion hole 17a, And is formed so as to penetrate in a direction orthogonal to the third slit hole (16). Here, the first pressure insertion hole 17a and the first pressure communication hole 17b may communicate with the first diameter adjustment groove 17.

At this time, a screw thread is formed on the inner periphery of at least one of the first pressure insertion hole 17a and the first pressure communication hole 17b so that the third fastening means 19b can be screwed. That is, the third fastening means 19b is inserted into the first pressure insertion hole 17a and inserted into the first pressure communication hole 17b via the first diameter adjustment groove 17, . As the third fastening means 19b is tightened, the gap between the opposite edges of the first diameter adjusting groove 17 may be narrowed.

The first diameter adjusting groove 17 is formed in the interval between the third slit holes 16 narrowed by the elastic deformation of the first split coupling portion 15a and the second split coupling portion 15b The gaps between the opposing edges corresponding to each other can be narrowed at the same time.

As a result, the third slit hole 16 and the first diameter adjusting groove 17 of the driving shaft DS1 inserted into the first shaft insertion hole 11 are formed at the outer circumferential side The first connecting portion 10 and the driving shaft DS1 are more firmly fixed by providing a uniform pressing force so that the efficiency of power transmission can be further improved.

Further, since the first shaft-engaging portion 15 is formed such that the width of the first diameter-adjusting groove 17 decreases toward one side in the axial direction, the first shaft-engaging portion 15 is elastically deformed by the fastening force of the first fastening means 19a. The area of both end portions cut by the first diameter adjusting groove 17 is minimized to prevent wear or breakage due to excessive elastic deformation, so that the durability of the product can be improved.

Meanwhile, the second connection portion 20 has a second slit hole 23 extending radially outward from the second shaft insertion hole 21 and extending in the circumferential direction corresponding to a predetermined angle, A detailed description of the structure of the second connection portion 20 including the base portion 24 and the second axis coupling portion 25 and having the same structure as that of the first connection portion 10 described in the present embodiment It will be omitted.

That is, the second shaft engaging portion 25 is formed in the second shaft insertion hole 21 so that the fourth slit hole, which extends radially outward from the inner periphery of the second shaft insertion hole 21 and extends in the axial direction, And the second fastening means 29a is fastened in a direction orthogonal to the hole. The second shaft engaging portion 25 is formed with a second diameter adjusting groove 27 which is narrowed in width from the inner circumference of the second shaft insertion hole 21 toward the other axial side, The adjusting groove 27 is formed in a shape corresponding to the first diameter adjusting groove 17 described above.

In addition, the interval between the rims of the second diameter adjusting groove 27 can be narrowed by the fourth fastening means 29b. At this time, the fourth fastening means 29b is provided with the second pressure insertion hole 27a and the first pressure communication hole (first pressure communication hole) formed corresponding to the first pressure insertion hole 17a and the first pressure communication hole 17b 27b and screwed together.

The first connecting portion 10 and the second connecting portion 20 are connected to the driving shaft DS1 and the driven shaft DS2 by only the connecting means 19a, 19b, 29a, 29b without a separate connecting member. Since the fixed structure is integrally formed, the component parts are simplified, and the assemblability and the productivity can be remarkably improved. Since the first connecting part 10 and the second connecting part 20 can be easily replaced with each other only by separating the respective fastening parts 19a, 19b, 29a and 29b, the usability and maintenance Can be improved.

FIG. 7 is a cross-sectional view illustrating a modified example of the first connection portion in the marine leisure light coupling according to an embodiment of the present invention. In the present embodiment, the basic configuration except for the first non-slip projections 111a is the same as that of the above-described embodiment, so a detailed description of the same configuration will be omitted.

7, a first non-slip projection 111a may protrude from the inner circumference of the first shaft insertion hole 111 formed at the central portion of the first connection portion 110. Referring to FIG. More specifically, the first non-slip projections 111a may be provided in the inner circumference of the first shaft insertion hole 111 at a predetermined interval along the circumferential direction, and a plurality of the first non-slip projections 111a may be formed from the inner circumference of the first shaft insertion hole 111 And projects radially inward. The first non-slip projections 111a extend in the axial direction corresponding to the length of the first shaft insertion hole 111 and may be integrally formed on the inner circumference of the first shaft insertion hole 111.

Here, the first non-slip projections 111a may be formed such that the ends thereof become narrower toward the radially inward direction, and the ends of the first non-slip projections 111a may be sharply formed. Accordingly, the first non-slip projections 111a can minimize the contact area with the outer periphery of the drive shaft DS1 and concentrate the vertical force acting on the drive shaft DS1 at the end portions.

The first shaft coupling part 115 formed by dividing the first coupling part 110 is cut by the third slit hole 116 and inserted into the first split coupling part 115a and the second split coupling part 115b, Lt; / RTI > At this time, a fastening communication hole 118b and a fastening insertion hole 118a are formed in the first split coupling portion 115a and the second split coupling portion 115b, respectively, in the direction orthogonal to the third slit hole 116 So that the first fastening means 119a can be inserted.

The first diameter adjusting groove 117 is recessed radially outward from the inner periphery of the first shaft insertion hole 111. In the first pressure insertion hole 117a and the first pressure communication hole 117b formed so as to extend from the opposite side edges of the first diameter adjustment groove 117 toward the outer periphery of the first connection portion 110, The means 119b are screwed. Accordingly, as the third fastening means 119b is fastened, the interval between the opposite edges of the first diameter adjusting groove 117 can be narrowed.

Here, the width of the first non-slip projections 111a is set to be equal to the distance between the first split coupling portion 115a and the second split coupling portion 115b, When the interval between the rims is narrowed, it is preferable that the ends of the plurality of first non-slip projections 111a are set to be in contact with the outer periphery of the drive shaft DS1.

That is, the diameter of the first shaft insertion hole 111 may be larger than the diameter of the drive shaft DS1, and the width of the first non-slip projection 111a may be larger than the inner diameter of the first shaft insertion hole 111 And the outer circumference of the drive shaft DS1.

Accordingly, the distance between the first split coupling portion 115a and the second split coupling portion 115b and the distance between the first split coupling portion 115a and the second split coupling portion 115b, corresponding to the tightening of the first coupling means 119a and the third coupling means 119b, As the distance between the mutually opposing edges of the first diameter adjustment groove 117 is narrowed, the ends of the plurality of first non-slip projections 111a can be brought into close contact with the outer periphery of the drive shaft DS1.

Accordingly, as the vertical force concentrated on the end portion of the first non-slip projection 111a acts uniformly along the outer circumference in correspondence with the tightening of the first fastening means 119a, the drive shaft DS1 The slip phenomenon occurring in the circumferential direction is minimized and the efficiency of power transmission can be further improved.

In this embodiment, the plurality of first non-slip projections 111a protrude from the first shaft insertion hole 111 formed at the center of the first connection portion 110. However, A second non-slip projection corresponding to the first non-slip projection 111a may be formed in the second shaft insertion hole formed at the center of the second connection portion. That is, a plurality of second non-slip projections may be radially inwardly projected at predetermined intervals along the circumferential direction so that the outer periphery of the follower shaft closely contacts the inner periphery of the second shaft insertion hole.

8A and 8B are cross-sectional views illustrating a modification of the elastic body in the lightweight coupling for marine leisure according to an embodiment of the present invention. In the present embodiment, the basic configuration except for the coupling protrusion 232 is the same as that of the above-described embodiment, so a detailed description of the same configuration will be omitted.

8A and 8B, the elastic body 230 includes an elastic body portion 231 and a plurality of coupling protrusions 232 projecting radially outward from the outer periphery of the elastic body portion 231 May be included.

At this time, an insertion assisting cutout 232c may be formed at an outer end of the engaging protrusion 232. Here, the insertion auxiliary cutout 232c may be recessed in the width direction from the outer end of the coupling protrusion 232 toward the radially inward side. The insertion assisting portion 232c may be extended to correspond to the axial length of the coupling protrusion 232. [ The insertion assisting portion 232c may be formed to have a narrower width toward the radially inward side. At this time, the insertion auxiliary cutout 232c may be formed at the center of the outer end of the coupling protrusion 232 so as to provide a uniform pressing force from the both sides of the coupling protrusion 232 toward the center.

The protrusions 233 may protrude from both sides of the coupling protrusions 232, respectively. The contact protrusions 233 may be integrally formed on both sides of the coupling protrusions 232 in the circumferential direction, that is, opposite side surfaces 232b of the coupling protrusions 232 adjacent to each other in the circumferential direction. The contact protrusion 233 may extend to correspond to the axial length of the coupling protrusion 232. The contact protrusions 233 may be in contact with the first rib protrusions 212 and the second rib protrusions 222 inserted between the engaging protrusions 232.

The contact protrusions 233 may protrude from the side surfaces 232b of the engaging protrusions 232 adjacent to the outer ends of the engaging protrusions 232. When the first rib protrusion 212 and the second rib protrusion 222 are inserted between the respective coupling protrusions 232, the coupling protrusions 232 are elastically deformed, The distance between the edges can be narrowed.

The outer end of the contact protrusion 233 is formed in a continuous profile from the outer end of the coupling protrusion 232 and has a radius of a side 232b of the coupling protrusion 232 corresponding to the predetermined point p Direction from the outer side toward the inner side. Here, it is preferable that the predetermined point p is one side of the side surface 232b of the coupling protrusion 232. [

In addition, the outer surface 233a may be concaved in the width direction so that the contact protrusion 233 has a smaller cross-sectional area toward the radially inward side. The outer surface 233a of the contact protrusion 233 may be formed to have a curvature corresponding to the curvature of the first rib protrusion 212 and the second rib protrusion 222 side surfaces 211a and 222a.

A gap is minimized between the outer surface 233a of the contact protrusion 233 and each of the side surfaces 211a and 222a of the first rib protrusion 212 and the second rib protrusion 222, .

The maximum width w3 between the engaging protrusions 232 adjacent to each other in the circumferential direction is set such that the width of the outer ends of the first rib protrusions 212 and the second rib protrusions 222 (W1 in Fig. 4).

8B, the lightweight coupling 300 for a marine leisure includes a first connection part 210 which is rotated integrally with the drive shaft DS1, a second connection part 220 which is integrally rotated with the subordinate shaft DS2 ) May be included. At this time, the elastic body 230 may be interposed between the first connection part 210 and the second connection part 220.

The first rib protrusion 212 protruding from the first connection part 210 and the second rib protrusion 222 protruding from the second connection part are alternately disposed along the circumferential direction and are disposed adjacent to each other along the circumferential direction. The first rib projection 212 and the second rib projection 222 are inserted between the coupling protrusions 232.

When the first rib protrusion 212 and the second rib protrusion 222 are inserted between adjacent engaging protrusions 232 along the circumferential direction, the first rib protrusion 212 and the second rib protrusion 222 222 may be in contact with both side surfaces of the engaging protrusion 232. In this case,

The side surface 232b of the coupling protrusion 232 and the outer surface 233a of the contact protrusion 233 are formed on the side surfaces 212a and 222a of the first rib protrusion 212 and the second rib protrusion 222, The outer end of the coupling protrusion 232 is elastically deformed to narrow the interval between the opposite sides of the insertion assisting cutout 232c.

That is, the maximum width w3 between the engaging protrusions 232 neighboring in the circumferential direction is increased to correspond to the width w1 of the outer ends of the first rib protrusions 212 and the second rib protrusions 222, Both side surfaces of the protrusion 232 can be pressed toward the center of the coupling protrusion 232 and elastically deformed.

The maximum width w3 between the engaging protrusions 232 adjacent to each other in the circumferential direction corresponds to the width w1 of the outer ends of the first rib protrusion 212 and the second rib protrusion 222 The adhesion of the side surfaces 232b of the engaging protrusions 232 to the side surfaces 212a and 222a of the first rib protrusions 212 and the second rib protrusions 222 can be further improved.

The maximum width w3 between the widths w1 of the outer ends of the first rib protrusions 212 and the second rib protrusions 222 and the respective engaging protrusions 232 neighboring along the circumferential direction is larger than the maximum width w3 The error intervals are corrected by the elastic deformation of the coupling protrusions 232 so that the first rib protrusions 212 and the second rib protrusions 222 are in close contact with the neighboring coupling protrusions 232 The efficiency of power transmission can be improved.

The outer surface 233a of the adhered protrusion 233 and the side surface 232b of the engaging protrusion 232 are formed on the side surfaces 212a and 222a of the first rib protrusion 212 and the second rib protrusion 222, ), The area of substantially mutual contact can be maximized. Since the first rib protrusion 212 and the second rib protrusion 222 are inserted while being corrected in the maximum width w3 between adjacent engaging protrusions 232, The assembling convenience can be improved.

As the adhesion between the side surface 232b of the coupling protrusion 232 and the side surfaces 212a and 222a of the first rib protrusion 212 and the second rib protrusion 222 is improved, a backlash phenomenon The first rib protrusion 212 and the second rib protrusion 222 are prevented from being worn or broken, thereby improving the durability and further improving the vibration and shaking damping performance.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And these modifications fall within the scope of the present invention.

10,110,210: First connection part 12,212: First rib projection
13: first slit hole 16, 116: third slit hole
17, 117: first diameter adjusting groove 20, 220: second connecting portion
22, 222: second rib projection 30, 230: elastic body
32,232: engaging projection portion 111a: first non-slip projection
232c: an insertion auxiliary incision part 233:
100,300: Lightweight coupling for marine leisure

Claims (5)

A lightweight coupling for a marine leisure interposed between the drive shaft and the slave shaft so that power provided from the drive shaft is transmitted to the slave shaft,
A plurality of first rib projections disposed on one side surface of the first driving shaft and spaced apart from each other by a predetermined angle in a circumferential direction, the first driving shaft being inserted into a first shaft insertion hole formed in a central portion of the first shaft insertion hole, A connecting portion;
And a second shaft inserted in a second shaft insertion hole formed in a center portion of the first shaft and facing the first connection portion, the first shaft portion being rotatable with the first shaft portion in a circumferential direction A plurality of second ribs protruding from the other side in the circumferential direction at a predetermined angle so as to be alternately arranged; And
Wherein a plurality of coupling protrusions are radially outwardly protruded from the outer periphery of the driving shaft and the end of the driven shaft at predetermined angles along a circumferential direction and radially outwardly protruded from the coupling protrusions, And an elastic body interposed between the first connection portion and the second connection portion such that the second rib projection is inserted alternately along the circumferential direction. The method according to claim 1,
Wherein the first connection portion is divided into a first base portion and a first shaft coupling portion by a first slit hole extending in a circumferential direction corresponding to a predetermined angle and penetrating radially outward from the first shaft insertion hole,
The first shaft engaging portion is provided with a first shaft engaging portion and a second shaft engaging portion. The first shaft engaging portion includes a first shaft engaging portion and a second shaft engaging portion. Means is fastened,
The second connection portion is divided into a second base portion and a second shaft coupling portion by a second slit hole penetrating radially outward from the second shaft insertion hole and extending in a circumferential direction corresponding to a predetermined angle,
And the second shaft engaging portion is provided with a second engagement hole in a direction orthogonal to the fourth slit hole so that the interval between the fourth slit holes extending radially outwardly from the inner circumference of the second shaft insertion hole and extending in the axial direction is selectively adjusted, Wherein the means for coupling is coupled to the lightweight coupling for marine leisure. 3. The method of claim 2,
Wherein the first shaft coupling portion is formed with a first diameter adjusting groove which is narrowed in width from the inner circumference of the first shaft insertion hole toward one side in the axial direction,
Wherein the second shaft coupling portion is formed with a second diameter control groove recessed from the inner circumference of the second shaft insertion hole toward the other side in the axial direction. The method according to claim 1,
Wherein the first rib projection and the second rib projection are formed such that the width of the outer end is larger than the width of the inner end and each side connecting the outer end and the inner end is rounded toward the center,
Side profiles of the engaging projections are formed to correspond to the side profiles of the first rib projections and the second rib projections,
A plurality of first non-slip projections are formed at predetermined intervals along the circumferential direction so that the outer periphery of the drive shaft is closely contacted with the inner periphery of the first shaft insertion hole,
Wherein a plurality of second non-slip projections are formed at predetermined intervals along the circumferential direction so that the outer periphery of the subordinate shaft is in close contact with the inner periphery of the second shaft insertion hole. The method according to claim 1,
Wherein a maximum width between the engaging protrusions is smaller than a width of an outer end of the first rib protrusion and the second rib protrusion,
And an insertion auxiliary incision is formed in an outer end of the coupling protrusion in a radial direction so as to insert the first rib protrusion and the second rib protrusion between the coupling protrusions,
Wherein the first and second rib projections are formed on both sides of the coupling protrusions so as to protrude from the first rib protrusion and the second rib protrusion.

Images