JP7270639B2 - Coupling cover - Google Patents

Description

The present invention relates to a coupling cover.

As shown in FIG. 24, the coupling cover 101 covers the coupling 401 that transmits rotational torque from the drive shaft 201 to the driven shaft 301, and is intended to protect the coupling 401, reduce noise, and prevent oil from scattering. there is

Japanese Patent Application Laid-Open No. 2009-108961 JP 2012-087938 A

The coupling cover 101, especially the coupling cover 101 having a structure that covers the entire coupling 401, prevents the removal of heat generated by the stirring resistance of the coupling 401, and may increase the temperature of the coupling 401 and the cover 101 themselves. . When the temperature of the coupling 401 and the cover 101 becomes high, the physical properties of the material deteriorate and the strength of the coupling 401 decreases due to material fatigue.

Low temperature couplings and coupling covers are desired.

One aspect of the coupling cover includes a cover body that rotatably accommodates a coupling that connects two shafts, and a radiator for heat radiation having an uneven shape provided on the cover body, and the cover The main body has a cylindrical peripheral wall, and a plurality of the radiators are provided on the peripheral surface of the peripheral wall. , a plurality of rows of uneven shapes are formed on the inner peripheral surface of the peripheral wall, and the rows of uneven shapes are axially arranged so as to guide the flow of air generated inside the cover main body in the direction of the ventilation holes. is inclined with respect to a plane perpendicular to

Another aspect of the coupling cover includes: a cover body that rotatably accommodates a coupling that connects two shafts; fins for heat radiation provided on the cover body; a radiator for heat radiation having an uneven shape, wherein the cover body has a cylindrical peripheral wall, the fins are provided in plurality in an annular shape along the peripheral surface of the peripheral wall, and the radiator are provided on the surface of the fins, the fins are provided on the inner peripheral surface of the peripheral wall, and the plurality of heat radiators are arranged in rows on the surface of the fins to form a plurality of uneven shapes. Forming a row, the uneven row is inclined with respect to a plane parallel to the axis so as to guide the flow of air generated inside the cover body toward the inner peripheral surface of the peripheral wall.

A lower temperature of the coupling and the coupling cover can be achieved.

Fig. 2 shows the coupling cover of the first embodiment, where (A) is a cross-sectional view cut along a plane including the central axis thereof, and (B) is a side view thereof; Fig. 10 is a view showing a coupling cover of Embodiment 2, (A) being a cross-sectional view cut along a plane including the central axis thereof, and (B) being a side view thereof; FIG. 10A is a cross-sectional view cut along a plane including the central axis of the coupling cover of Embodiment 3, and FIG. 11B is a side view thereof; FIG. 12A is a cross-sectional view cut along a plane including the central axis of the coupling cover according to the fourth embodiment, and FIG. 11B is a side view thereof; FIG. 10A is a view showing a coupling cover of Embodiment 5, where (A) is a cross-sectional view taken along a plane including the central axis thereof, and (B) is a cross-sectional view taken along line EE in (A); FIG. 11 is a cross-sectional view of the main part of the coupling cover of Embodiment 6 taken along a plane perpendicular to the axis including the center line of the ventilation hole; FIG. 11 is a cross-sectional view of the main part of the coupling cover of Embodiment 7 taken along a plane perpendicular to the axis including the center line of the vent hole; 5(A) is a view of the ventilation hole of the coupling cover of Embodiment 5 as viewed from the inside of the cover main body, and is a view in the direction of arrow F in FIG. 5(B); FIG. 12C is a view of the vent hole of the cover for the ring as seen from the inside of the cover main body, and FIG. (A) is a cross-sectional view of the main part of the coupling cover of the tenth embodiment cut along a plane including the central axis, and (B) and (C) are the coupling cover of the eleventh embodiment including the central axis. FIG. 2 is a cross-sectional view of a main part cut along a plane; (A) is a cross-sectional view of the essential parts of the coupling cover of Embodiment 12 taken along a plane perpendicular to its axis, and (B) is a cross-sectional view of the essential parts of the coupling cover of Embodiment 13 taken along a plane perpendicular to the axis. figure. FIG. 12A is a view showing a coupling cover of Embodiment 14, where (A) is a cross-sectional view taken along a plane including the central axis thereof, and (B) is a cross-sectional view taken along line GG in (A). FIG. 12A is a view showing a coupling cover according to a fifteenth embodiment, where (A) is a cross-sectional view taken along a plane including the central axis thereof, and (B) is a cross-sectional view taken along the line HH in (A);

(A) is a plan view of a projection provided on a coupling cover according to a sixteenth embodiment; (B), (C), and (D) are plan views of a projection provided on a coupling cover according to a seventeenth embodiment; (A), (B), and (C) are plan views of protrusions provided on the coupling cover of the eighteenth embodiment. (A), (B), and (C) are plan views of projections provided on the coupling cover of the nineteenth embodiment. (A), (B), and (C) are plan views of projections provided on the coupling cover of Embodiment 20, and (D), (E), and (F) are projections provided on the coupling cover of Embodiment 21. top view. (A), (B), and (C) are plan views of projections provided on the coupling cover of Embodiment 22, and (D), (E), and (F) are projections provided on the coupling cover of Embodiment 23. top view. (A), (B), and (C) are plan views of projections provided on the coupling cover of Embodiment 24, and (D), (E), and (F) are projections provided on the coupling cover of Embodiment 25. top view. (A), (B), and (C) are plan views of projections provided on the coupling cover of Embodiment 26, and (D) and (E) are plan views of projections provided on the coupling cover of Embodiment 27. . (A), (B), and (C) are plan views of projections provided on the coupling cover of Embodiment 28, and (D), (E), and (F) are projections provided on the coupling cover of Embodiment 29. top view. (A), (B), and (C) are plan views of projections provided on the coupling cover of Embodiment 30, and (D), (E), and (F) are projections provided on the coupling cover of Embodiment 31. top view. (A), (B), and (C) are plan views of projections provided on the coupling cover of Embodiment 32, and (D), (E), and (F) are projections provided on the coupling cover of Embodiment 33. top view. (A), (B), and (C) are plan views of projections provided on the coupling cover of the thirty-fourth embodiment, and (D), (E), and (F) are projections provided on the coupling cover of the thirty-fifth embodiment. top view. Sectional drawing of the cover for couplings demonstrated by background art.

As shown in FIGS. 1(A)(B) to 23(A)(B)(C), the coupling cover 1 (hereinafter sometimes abbreviated as "cover 1") of the present embodiment includes: The cover covers a coupling 401 that connects both shafts so as to transmit rotational torque from the drive shaft to the driven shaft (both not shown). The coupling cover 1 is installed for the purpose of protecting the coupling 401, soundproofing, and preventing oil and dust from scattering. In this embodiment, it is assumed that the coupling 401 is a diaphragm type coupling. In practice, the type and specifications of the coupling 401 are not particularly limited.

The coupling cover 1 is provided with flange-like end walls 31 at both ends in the axial direction of a cylindrical peripheral wall 21 (hereinafter sometimes referred to as "cover peripheral wall 21") disposed on the outer peripheral side of the coupling 401. A cover body 11 having a rectangular shape is provided, and a coupling 401 is rotatably accommodated inside the cover body 11 . The cylindrical peripheral wall 21 is provided with a ventilation hole (exhaust port) 22 communicating between the inside and outside of the cover main body 11 at one place on the circumference at the center in the axial direction. A shaft hole 32 through which the drive shaft and the driven shaft are rotatably inserted is provided on each center axis of the flange-shaped end wall 31 .

The coupling 401 and the coupling cover 1 may become hot as the coupling 401 rotates. The cover 1 of this embodiment has a heat dissipation function. Various embodiments 1-35 of the coupling cover 1 having a heat dissipation function are introduced below.

Embodiment 1
As shown in FIGS. 1A and 1B, the cover body 11 is provided with a plurality of fins 41 for heat dissipation. The fin 41 has an annular shape along the peripheral surface of the cover peripheral wall 21 and has a triangular cross section. The fins 41 having such a shape are attached to the outer peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction. Therefore, a plurality of fins 41 are regularly arranged on the outer peripheral surface of the cover peripheral wall 21 . The fins 41 are attached to the cover peripheral wall 21 by welding, for example.

In practice, the fins 41 may be provided integrally with the cover body 11 . The fact that the fins 41 may be provided integrally with the cover body 11 is common to various embodiments described below.

Embodiment 2
As shown in FIGS. 2A and 2B, the cover body 11 is provided with a plurality of fins 41 for heat radiation. The fin 41 has an annular shape along the peripheral surface of the cover peripheral wall 21 and has a rectangular cross section. The fins 41 having such a shape are attached to the outer peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction. Therefore, a plurality of fins 41 are regularly arranged on the outer peripheral surface of the cover peripheral wall 21 .

Embodiment 3
As shown in FIGS. 3A and 3B, the cover body 11 is provided with a plurality of fins 41 for heat radiation. The fin 41 has an annular shape along the peripheral surface of the cover peripheral wall 21 and has a rectangular cross section. The fins 41 having such a shape are attached to the outer peripheral surface and the inner peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction. Therefore, a plurality of fins 41 are regularly arranged on the outer peripheral surface and the inner peripheral surface of the cover peripheral wall 21 .

In practice, the fins 41 may be attached only to the inner peripheral surface of the cover peripheral wall 21 .

According to Embodiments 1, 2 and 3, part of the heat is transferred from the peripheral wall 21 of the cover body 11 to the fins 41, and the heat radiation area of the cover 1 as a whole is increased. Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be lowered. As a result, the temperature of the coupling 401 and the coupling cover 1 can be lowered.

In Embodiments 1, 2 and 3 above, the fin 41 may be formed by winding a belt-like material into a coil.

Embodiment 4
As shown in FIGS. 4(A) and 4(B), the coupling cover 1 of the present embodiment has fins 41 provided on the inner peripheral surface of the cover peripheral wall 21 in addition to the structure of the third embodiment. The angle is tilted with respect to the angle perpendicular to the axial direction. For convenience of explanation, the angle at which the fins 41 are inclined is assumed to be an inclination angle _θ1 . The tilt angle θ ₁ is explained as follows.

The air inside the cover body 11 gently flows in a certain direction as the coupling 401 rotates. The inclination angle θ ₁ of the fins 41 is a plane perpendicular to the axis of the cover peripheral wall 21 including the central axis of the air vent 22 so as to guide the flow of air generated inside the cover body 11 toward the air vent 22 . (hereafter referred to as "axis-perpendicular plane 21A"). More specifically, the inclination angle θ ₁ is the smallest (L ₁ ) at one position on the circumference where the axial distance between the fin 41 and the axis-perpendicular plane 21A is the same as the vent hole 22, and It is set to be the largest (L ₂ ). In other words, the inclination angle _θ1 is set so that the axial distance between the fins 41 and the axis-perpendicular plane 21A becomes smaller as the air holes 22 are approached along the circumference of the inner peripheral surface of the cover peripheral wall 21. there is

According to this configuration, the air flow inside the cover main body 11 is guided by the fins 41 toward the ventilation holes 22, so that the air relatively hot with respect to the outside air is easily released from the ventilation holes 22 to the outside of the cover 1. . Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be further lowered.

Embodiment 5
As shown in FIGS. 5(A) and 5(B), the coupling cover 1 of the present embodiment has, in addition to the configurations of the first to fourth embodiments, the inner peripheral surface of the cover peripheral wall 21 and the air flow. A baffle plate 51 is provided downstream of the vent 22 in flow. As shown in FIG. 5(B), in this embodiment, the air flows clockwise, so the baffle plate 51 is provided on the right side of the vent hole 22 in FIG. 5(B).

According to this configuration, the flow of air guided by the fins 41 collides with the baffle plate 51 and changes its direction toward the ventilation holes 22 (arrow C), so that the air is more easily discharged from the ventilation holes 22 . Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be further lowered.

In the present embodiment, a configuration example in which the baffle plate 51 is added to the fourth embodiment is shown, but it goes without saying that the baffle plate 51 may be added to the first to third embodiments.

Embodiment 6
In the above-described fifth embodiment, the baffle plate 51 is arranged in a direction parallel to a plane in a direction parallel to an axis passing through the axis of the cover peripheral wall 21 including the central axis of the vent hole 22 (hereinafter referred to as "axial plane 21B"). An example is shown. As shown in FIG. 6, in the coupling cover 1 of this embodiment, the baffle plate 51 is arranged at an inclination angle _θ2 with respect to the axial plane 21B. The inclination angle _θ2 is set to an angle inclined in the direction of air flow in the cover body 11 with respect to the axial plane 21B in FIG.

According to this configuration, the inclination angle θ ₂ of the baffle plate 51 further increases the flow rate of the air flowing toward the ventilation holes 22 . Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be further lowered.

Embodiment 7
In the fifth embodiment described above, an example in which the baffle plate 51 is formed in a flat plate shape is shown. As shown in FIG. 7, in the coupling cover 1 of the present embodiment, the baffle plate 51 is formed into a curved surface curved in its height direction. The height direction of the baffle plate 51 is the radial direction of the cover peripheral wall 21, which is the vertical direction in FIG. As a result, the baffle plate 51 is provided with a concave air receiving surface 52 having a predetermined radius R on the side receiving the air discharged from the ventilation holes 22 .

According to this configuration, the direction of the air flow is changed toward the ventilation hole 22 by the concave curved shape of the air receiving surface 52, so that the flow rate of the air flowing toward the ventilation hole 22 is further increased. Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be further lowered.

Embodiment 8
In the fifth embodiment described above, as shown in FIG. 8A, an example in which the baffle plate 51 is formed of a single flat plate is shown. As shown in FIG. 8B, the baffle plate 51 of the coupling cover 1 of this embodiment is formed by arranging two flat plates in a V shape. The two baffle plates 51 are arranged in the tangential direction of the planar circular ventilation hole 22 . As a result, the baffle plate 51 has an air receiving surface 52 surrounded by a V shape on the side that receives the air exhausted from the ventilation holes 22 .

According to this configuration, the direction of the air flow is changed toward the vent hole 22 by the V-shaped shape of the air receiving surface 52, so that the flow rate of the air flowing toward the vent hole 22 is further increased. Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be further lowered.

In practice, the two baffle plates 51 may be one V-shaped baffle plate 51 .

Embodiment 9
In the fifth embodiment described above, as shown in FIG. 8A, an example in which the baffle plate 51 is formed in a flat plate shape is shown. As shown in FIG. 8(C), the baffle plate 51 of the coupling cover 1 of this embodiment is formed in a curved surface that curves in its width direction. The width direction of the baffle plate 51 is the circumferential direction of the cover peripheral wall 21, which is the vertical direction in FIG. 8(C). As a result, the baffle plate 51 is provided with an air receiving surface 52 having a predetermined radius on the side receiving the air discharged from the ventilation holes 22 . The air receiving surface 52 is arranged along the periphery of the opening of the vent hole 22 having a circular plane shape.

According to this configuration, the curved shape of the air receiving surface 52 causes the flow of air to change direction toward the ventilation holes 22 , so that the flow rate of the air flowing toward the ventilation holes 22 is further increased. Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be further lowered.

Embodiment 10
As shown in FIG. 9A, in this embodiment, the cover body 11 is provided with projections 61 having an uneven shape. A plurality of protrusions 61 are provided as radiators for heat dissipation, and are regularly arranged on the inner peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction and the peripheral direction.

According to this configuration, part of the heat is transferred from the peripheral wall 21 of the cover main body 11 to the protrusion 61, and the heat radiation area of the cover 1 as a whole is also increased. Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be lowered. As a result, the temperature of the coupling 401 and the coupling cover 1 can be lowered.

In practice, the protrusions 61 may be provided on the outer peripheral surface of the cover peripheral wall 21 or may be provided on both the inner peripheral surface and the outer peripheral surface of the cover peripheral wall 21 . The protrusions 61 may be randomly arranged. Instead of this, the protrusion 61 may be a recess. In this case, the heat radiation area of the cover 1 as a whole is increased, so that the amount of heat radiation is increased and the temperature of the coupling 401 and the cover 1 itself can be reduced. is possible.

Embodiment 11
As shown in FIG. 9(B) or (C), in this embodiment, in addition to the configuration of the tenth embodiment, a plurality of projections 61 are arranged in a line to form an uneven row 62, A plurality of rows of uneven shapes 62 are arranged side by side. In this embodiment, the uneven row 62 has a form in which a plurality of projections 61 are arranged in a row in the arrow D direction. In practice, the plurality of protrusions 61 are not limited to being arranged in one row, and may be arranged in a plurality of rows to form the uneven row 62 .

The air inside the cover body 11 gently flows in a certain direction as the coupling 401 rotates. The concave-convex row 62 is inclined with respect to the axis-perpendicular plane 21</b>A so as to guide the flow of air inside the cover body 11 to the ventilation hole 22 . The inclination angle of such uneven shape rows 62 is set in the same manner as the fins 41 in the fourth embodiment.

According to this configuration, the flow of air inside the cover body 11 is guided by the concave-convex row 62 and directed toward the ventilation holes 22 (arrow D), so that the air is easily discharged from the ventilation holes 22 . Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be further lowered.

Embodiment 12
As shown in FIG. 10A, in this embodiment, the cover body 11 is provided with fins 41 for heat radiation. The fins 41 are annularly formed along the peripheral wall 21 of the cover body 11 . A plurality of such fins 41 are provided and attached to the inner peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction (the direction perpendicular to the paper surface in FIG. 10A). Projections 61 are provided on the surface of the fins 41 as radiators for heat radiation having an uneven shape, and the plurality of projections 61 are arranged at a constant pitch in the radial and circumferential directions.

According to this configuration, part of the heat is transferred from the peripheral wall 21 of the cover body 11 to the fins 41 and part of the heat is transferred from the fins 41 to the protrusions 61 . The heat dissipation area of the cover 1 as a whole is also increased. Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be lowered. As a result, the temperature of the coupling 401 and the coupling cover 1 can be lowered.

In practice, the protrusions 61 may be randomly arranged. The protrusion 61 may alternatively be a recess.

Embodiment 13
In the twelfth embodiment, an example in which a plurality of projections 61 are arranged in a line to form an uneven row 62 and this uneven row 62 is provided in the radial direction of the cover peripheral wall 21 is shown. As shown in FIG. 10(B), in this embodiment, the direction of the concave-convex shape row 62 is set in a spiral shape.

According to this configuration, the air flow guided by the concave-convex row 62 obliquely hits the inner peripheral surface of the cover peripheral wall 21 , so that the air can easily flow in the circumferential direction inside the cover body 11 . Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be further lowered.

Fourteenth embodiment
As shown in FIGS. 11A and 11B, in this embodiment, the cover body 11 is provided with a plurality of fins 41 for heat dissipation. The fin 41 has an annular shape along the peripheral surface of the cover peripheral wall 21 and has a rectangular cross section. The fins 41 having such a shape are attached to the outer peripheral surface and the inner peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction. Therefore, a plurality of fins 41 are regularly arranged on the outer peripheral surface of the cover peripheral wall 21 . The fins 41 are attached to the cover peripheral wall 21 by welding, for example.

The cover body 11 is also provided with protrusions 61 having an uneven shape. A plurality of protrusions 61 are provided as radiators for heat dissipation, and are regularly arranged on the inner peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction and the peripheral direction.

A plurality of protrusions 61 are also provided on the surface of the fin 41 . The protrusions 61 provided on the fins 41 are also heat dissipating bodies having uneven shapes.

According to this configuration, part of the heat is transferred from the peripheral wall 21 of the cover body 11 to the fins 41 and part of the heat is transferred from the fins 41 to the protrusions 61 . Part of the heat is also transferred from the peripheral wall 21 of the cover body 11 to the projection 61 . Furthermore, the heat dissipation area of the cover 1 as a whole is increased. Therefore, the heat radiation amount of the cover main body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air stirring resistance of the coupling 401 can be lowered. As a result, the temperature of the coupling 401 and the coupling cover 1 can be lowered.

Embodiment 15
As shown in FIGS. 12A and 12B, in this embodiment, the cover main body 11 is provided with a plurality of fins 41 for heat dissipation. The fin 41 has an annular shape along the peripheral surface of the cover peripheral wall 21 and has a rectangular cross section. The fins 41 having such a shape are attached to the outer peripheral surface and the inner peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction. Therefore, a plurality of fins 41 are regularly arranged on the outer peripheral surface of the cover peripheral wall 21 . The fins 41 are attached to the cover peripheral wall 21 by welding, for example.

The cover body 11 is also provided with protrusions 61 having an uneven shape. A plurality of protrusions 61 are provided as radiators for heat dissipation, and are regularly arranged on the inner peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction and the peripheral direction.

A plurality of protrusions 61 are also provided on the surface of the fin 41 . The protrusions 61 provided on the fins 41 are also heat dissipating bodies having uneven shapes.

In the coupling cover 1 of the present embodiment, the angle of the uneven row 62 formed by the fins 41 and the plurality of projections 61 provided on the inner peripheral surface of the cover peripheral wall 21 is inclined with respect to the angle perpendicular to the axial direction. ing. The inclination angles of the fins 41 and the rows of uneven shapes 62 are explained as follows.

The air inside the cover body 11 gently flows in a certain direction as the coupling 401 rotates. The angle of inclination of the fins 41 and the row of uneven shapes 62 is such that the air flow generated inside the cover body 11 is directed toward the ventilation hole 22 . is the angle set with respect to The inclination angle at this time is set similarly to the fins 41 in the fourth embodiment and the uneven row 62 in the eleventh embodiment. The protrusion 61 provided on the surface of the fin 41 is formed in a spiral shape, as in the thirteenth embodiment.

The first to fifteenth embodiments have been described above. The concave-convex shape of the heat radiator for heat dissipation described in each of these embodiments may be a recess instead of the protrusion 61 . Further, the uneven shape of the radiator may be a combination of projections 61 and recesses.

Embodiments 16 to 35 described below are various embodiments of the projections 61 provided as uneven shapes of the radiators for heat dissipation in the above embodiments. These protrusions 61 may also be recesses or a combination of protrusions 61 and recesses. 13(A)(B)(C)(D) to 23(A)(B)(C)(D)(E)(F) showing embodiments 16 to 35, arrows indicate air flow. direction.

Sixteenth embodiment
As shown in FIG. 13A, the projection 61 has a circular planar shape.

Embodiment 17
As shown in FIGS. 13B, 13C, and 13D, the planar shape of the protrusion 61 is a semicircle obtained by cutting a circle along a diameter line 63. As shown in FIGS. Diameter line 63 is oriented parallel or nearly parallel to the flow of air.

Embodiment 18
As shown in FIGS. 14A, 14B, and 14C, the planar shape of the protrusion 61 is a semicircle obtained by cutting a circle along a diameter line 63 . Diameter line 63 is located upstream of the air flow and is oriented perpendicular or nearly perpendicular to the air flow.

Embodiment 19
As shown in FIGS. 15A, 15B, and 15C, the planar shape of the projection 61 is elliptical. The elliptical shape has its major axis 64 oriented parallel or nearly parallel to the air flow.

Embodiment 20
As shown in FIGS. 16A, 16B, and 16C, the planar shape of the projection 61 is a half ellipse shape obtained by cutting an ellipse along a major axis line 64 . The major lines 64 are oriented parallel or nearly parallel to the air flow.

Embodiment 21
As shown in FIGS. 16(D), 16(E), and 16(F), the planar shape of the projection 61 is a half ellipse shape obtained by cutting an ellipse along a minor axis 65 . The short diameter line 65 is arranged on the upstream side of the air flow and is oriented perpendicularly or substantially perpendicularly to the air flow.

Embodiment 22
As shown in FIGS. 17A, 17B, and 17C, the planar shape of the projection 61 is formed by combining an elliptical half portion 66 and a triangular portion 67 obtained by cutting an elliptical shape along the short axis line. It has a shape in which the radial line and the base of the triangle are overlapped. The projection 61 has a triangular portion 67 facing the upstream direction of the air flow. The planar shape of the protrusion 61 is linearly symmetrical, and the center line 68 thereof is oriented parallel or almost parallel to the flow of air.

Embodiment 23
As shown in FIGS. 17(D), (E), and (F), the planar shape of the projection 61 is formed by combining a half ellipse portion 66 and a triangular portion 67 obtained by cutting an ellipse along the minor axis. It has a shape in which the radial line and the base of the triangle are overlapped. The projection 61 has a triangular portion 67 facing the downstream direction of the air flow. The planar shape of the protrusion 61 is linearly symmetrical, and the center line 68 thereof is oriented parallel or almost parallel to the flow of air.

Embodiment 24
As shown in FIGS. 18A, 18B, and 18C, the planar shape of the protrusion 61 is a rhombus. The rhombus has its long diagonal 69 oriented parallel or nearly parallel to the air flow.

Embodiment 25
As shown in FIGS. 18(D), 18(E) and 18(F), the planar shape of the projection 61 is a triangular half rhombus obtained by cutting a rhombus along its longer diagonal 69 . Diagonals 69 are oriented parallel or nearly parallel to the flow of air.

Embodiment 26
As shown in FIGS. 19A, 19B, and 19C, the projection 61 has a rectangular planar shape. The rectangle has its long side 70 oriented parallel or nearly parallel to the air flow.

Embodiment 27
As shown in FIGS. 19D and 19E, the planar shape of the projection 61 is a parallelogram. The parallelogram has its short side 71 oriented perpendicular to the air flow.

Embodiment 28
As shown in FIGS. 20A, 20B, and 20C, the projection 61 has a trapezoidal planar shape. The trapezoid has its short base 72 oriented in the upstream direction of the air flow. The base 72 is oriented perpendicular, or nearly perpendicular, to the flow of air.

Embodiment 29
As shown in FIGS. 20D, 20E, and 20F, the projection 61 has a trapezoidal planar shape. The trapezoid has its short base 72 oriented in the downstream direction of the air flow. The base 72 is oriented perpendicular, or nearly perpendicular, to the flow of air.

Embodiment 30
As shown in FIGS. 21A, 21B, and 21C, the planar shape of the protrusion 61 is a shape obtained by cutting a triangle from a trapezoid. The trapezoid and triangle are arranged such that the longer base of the trapezoid and the base of the triangle overlap each other. The protrusion 61 has the shorter base of the trapezoid positioned upstream of the air flow. The planar shape of the protrusion 61 is linearly symmetrical, and the center line 73 thereof is oriented parallel or substantially parallel to the air flow.

Embodiment 31
As shown in FIGS. 21(D), 21(E) and 21(F), the planar shape of the protrusion 61 is a shape obtained by cutting a triangle from a trapezoid. The trapezoid and triangle are arranged such that the longer base of the trapezoid and the base of the triangle overlap each other. The protrusion 61 has the shorter base of the trapezoid positioned downstream of the air flow. The planar shape of the protrusion 61 is linearly symmetrical, and the center line 73 thereof is oriented parallel or substantially parallel to the air flow.

Embodiment 32
As shown in FIGS. 22A, 22B, and 22C, the planar shape of the protrusion 61 is triangular, and isosceles triangular. The triangle has its base 74 located downstream of the air flow and oriented perpendicular or nearly perpendicular to the air flow.

Embodiment 33
As shown in FIGS. 22D, 22E, and 22F, the planar shape of the protrusion 61 is triangular (isosceles triangle). The triangle has its base 74 positioned upstream of the air flow and oriented perpendicular or nearly perpendicular to the air flow.

Embodiment 34
As shown in FIGS. 23A, 23B, and 23C, the planar shape of the projection 61 is a shape obtained by cutting a low triangle (isosceles triangle) from a high triangle (isosceles triangle). ing. Both triangles have their bases overlapping each other. The triangle points its vertex 75 toward the upstream side of the air flow. The planar shape of the projection 61 is linearly symmetrical, and the center line 76 thereof is oriented parallel or almost parallel to the flow of air.

Embodiment 35
As shown in FIGS. 23(D), (E) and (F), the planar shape of the protrusion 61 is a shape obtained by cutting a low triangle (isosceles triangle) from a high triangle (isosceles triangle). ing. Both triangles have their bases overlapping each other. The triangle points its vertex 75 toward the downstream side of the air flow. The planar shape of the projection 61 is linearly symmetrical, and the center line 76 thereof is oriented parallel or almost parallel to the flow of air.

In the sixteenth to thirty-fifth embodiments, the protrusion 61 may be a recess instead.

1 Coupling Cover 11 Cover Body 21 Peripheral Wall 21A Axis Perpendicular Plane 22 Air Vent 31 End Wall 32 Shaft Hole 41 Fin 51 Baffle Plate 52 Air Receiving Surface 61 Projection (Radiator)
62 uneven shape row 63 diameter line 64 major axis line 65 minor axis line 66 portion 67 portion 68 center line 69 diagonal line 70 long side 71 short side 72 base 73 center line 74 base 75 vertex 76 center line 401 coupling θ ₁ tilt angle θ ₂ tilt angle

Claims (3)

a cover body that rotatably accommodates a coupling that connects the two shafts;
a radiator for heat radiation having an uneven shape provided on the cover main body;
with
The cover body includes a cylindrical peripheral wall,
A plurality of the radiators are provided on the peripheral surface of the peripheral wall,
the peripheral wall includes a vent hole communicating between the inside and outside of the cover body,
a plurality of the radiators are arranged in a row on the inner peripheral surface of the peripheral wall to form a plurality of uneven rows;
The row of irregularities is inclined with respect to a plane perpendicular to the axis so as to guide the flow of air generated inside the cover body in the direction of the ventilation hole.
Coupling cover. The radiators are regularly arranged on the peripheral surface of the peripheral wall,
The coupling cover according to claim 1 . a cover body that rotatably accommodates a coupling that connects the two shafts;
heat radiation fins provided on the cover body;
a radiator for heat dissipation having an uneven shape provided on the surface of the fin;
with
The cover body includes a cylindrical peripheral wall,
The fins are provided in a plurality in an annular shape along the peripheral surface of the peripheral wall,
A plurality of the radiators are provided on the surface of the fins,
The fins are provided on the inner peripheral surface of the peripheral wall,
a plurality of the radiators are arranged in a row on the surface of the fins to form a plurality of uneven rows;
The rows of uneven shapes are inclined with respect to a plane parallel to the axis so as to guide the flow of air generated inside the cover body toward the inner peripheral surface of the peripheral wall.
Coupling cover.

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