WO2020100905A1

WO2020100905A1 - Cover for coupling

Info

Publication number: WO2020100905A1
Application number: PCT/JP2019/044368
Authority: WO
Inventors: 古川　泰成
Original assignee: イーグル工業株式会社
Priority date: 2018-11-14
Filing date: 2019-11-12
Publication date: 2020-05-22
Also published as: JPWO2020100905A1; JP7270639B2

Abstract

A cover (1) for a coupling is provided with a cover body (11) that rotatably accommodates a coupling (401) for linking shafts, and fins (41) for heat dissipation are provided to the cover body (11). A plurality of the fins (41) are provided to the peripheral surface of a tubular peripheral wall (21) of the cover body (11). A vent hole (22) communicating the interior with the exterior of the cover body (11) is provided to the peripheral wall (21). The fins (41) provided to the inner peripheral surface of the peripheral wall (21) are inclined relative to a plane orthogonal to the axis of the peripheral wall (21), so that the flow of air generated inside the cover body (11) is guided in the direction of the vent hole (22).

Description

Coupling cover

The present invention relates to a cover for coupling.

As shown in FIG. 24, the coupling cover 101 covers the coupling 401 that transmits the rotational torque from the drive shaft 201 to the driven shaft 301, and protects the coupling 401, prevents noise, and prevents oil from scattering. There is.

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

The coupling cover 101, in particular, the coupling cover 101 having a structure that covers the entire coupling 401 may prevent the heat generated by the stirring resistance of the coupling 401 from being removed, and the coupling 401 and the cover 101 themselves may become hot. .. When the temperature of the coupling 401 and the cover 101 becomes high, the physical properties of the material are deteriorated and the strength of the coupling 401 is deteriorated due to material fatigue.

-Lower temperature of coupling and coupling cover is desired.

One aspect of the coupling cover includes a cover body that rotatably accommodates a coupling that connects two shafts, and a heat dissipation fin provided on the cover body.

Another aspect of the coupling cover includes a cover body that rotatably accommodates a coupling that connects two shafts, and a radiator for radiating heat, which is provided on the cover body and has an uneven shape.

Yet another aspect of the coupling cover is a cover body that rotatably accommodates a coupling that connects two shafts, a fin for heat radiation provided on the cover body, and a surface of the fin. And a radiator for radiating heat having a concavo-convex shape.

-The temperature of the coupling and the coupling cover can be lowered.

FIG. 3 is a view showing the coupling cover of the first embodiment, (A) is a cross-sectional view cut along a plane including the central axis, and (B) is a side view thereof. FIG. 6 is a view showing a coupling cover of the second embodiment, (A) is a cross-sectional view cut along a plane including a central axis thereof, and (B) is a side view thereof. 13A and 13B are views showing a coupling cover of the third embodiment, in which FIG. 13A is a sectional view cut along a plane including a central axis thereof, and FIG. FIG. 6 is a view showing a coupling cover of Embodiment 4, (A) is a cross-sectional view cut along a plane including the central axis, and (B) is a side view thereof. FIG. 16 is a view showing a coupling cover of the fifth embodiment, (A) is a cross-sectional view cut along a plane including the central axis, and (B) is a cross-sectional view taken along line EE in (A). FIG. 16 is a cross-sectional view of a main part of the coupling cover according to the sixth embodiment, which is cut along a plane perpendicular to the axis including a center line of a ventilation hole. FIG. 16 is a cross-sectional view of a main part of the coupling cover according to the seventh embodiment cut along a plane perpendicular to an axis including a center line of a ventilation hole. (A) is the figure which looked at the ventilation hole of the coupling cover of Embodiment 5 from the inside of a cover main body, and is a F direction arrow line view in FIG. 5 (B), (B) is the cup of Embodiment 8 The figure which looked at the ventilation hole of the ring cover from the inside of the cover body, and (C) is the figure which looked at the ventilation hole of the coupling cover of the ninth embodiment from the inside of the cover body. (A) is a sectional view of an essential part of the coupling cover of the tenth embodiment cut along a plane including the central axis thereof, and (B) and (C) of the coupling cover of the eleventh embodiment include the central axis thereof. Sectional drawing of the principal part cut by the plane. (A) is a sectional view of a main part of the coupling cover of the twelfth embodiment cut along a plane perpendicular to the axis thereof, and (B) is a sectional view of a main part of the coupling cover of the thirteenth embodiment cut along a plane perpendicular to the axis thereof. Fig. FIG. 33 is a diagram showing a coupling cover of the fourteenth embodiment, in which (A) is a cross-sectional view cut along a plane including the central axis thereof, and (B) is a cross-sectional view taken along line GG in (A). FIG. 32 is a diagram showing a coupling cover of the fifteenth embodiment, where (A) is a cross-sectional view cut along a plane including the central axis thereof, and (B) is a cross-sectional view taken along line HH in (A).

(A) is a plan view of a protrusion provided on the coupling cover of the sixteenth embodiment, and (B), (C) and (D) are plan views of a protrusion provided on the coupling cover of the seventeenth embodiment. (A) (B) (C) is a top view of the protrusion with which the cover for coupling of Embodiment 18 is equipped. (A) (B) (C) is a top view of the protrusion with which the cover for coupling of Embodiment 19 is equipped. (A), (B) and (C) are plan views of protrusions provided on the coupling cover of the twentieth embodiment, and (D), (E) and (F) are protrusions provided on the coupling cover of the twenty-first embodiment. Plan view of. (A), (B) and (C) are plan views of protrusions provided on the coupling cover of the twenty-second embodiment, and (D), (E) and (F) are protrusions provided on the coupling cover of the twenty-third embodiment. Plan view of. (A), (B) and (C) are plan views of protrusions provided on the coupling cover of the twenty-fourth embodiment, and (D), (E) and (F) are protrusions provided on the coupling cover of the twenty-fifth embodiment. Plan view of. (A), (B) and (C) are plan views of the projections provided on the coupling cover of the twenty-sixth embodiment, and (D) and (E) are plan views of the projections provided on the coupling cover of the twenty-seventh embodiment. .. (A), (B) and (C) are plan views of protrusions provided on the coupling cover of the twenty-eighth embodiment, and (D), (E) and (F) are protrusions provided on the coupling cover of the twenty-ninth embodiment. Plan view of. (A), (B) and (C) are plan views of protrusions provided on the coupling cover of the thirtieth embodiment, and (D), (E) and (F) are protrusions provided on the coupling cover of the thirty-first embodiment. Plan view of. (A), (B) and (C) are plan views of the projections provided on the coupling cover of the thirty-second embodiment, and (D), (E) and (F) are projections provided on the coupling cover of the thirty-third embodiment. Plan view of. (A), (B) and (C) are plan views of protrusions provided on the coupling cover of the thirty-fourth embodiment, and (D), (E) and (F) are protrusions provided on the coupling cover of the thirty-fifth embodiment. Plan view of. Sectional drawing of the cover for coupling demonstrated by background art.

As shown in FIGS. 1 (A) and (B) to FIGS. 23 (A), (B), and (C), the coupling cover 1 (hereinafter also referred to as “cover 1”) of the present embodiment is The target of the cover is a coupling 401 that connects both shafts so as to transmit rotational torque from a drive shaft to a driven shaft (neither is shown). The coupling cover 1 is installed for the purpose of protecting the coupling 401, soundproofing, and preventing oil and dust from scattering. In the present embodiment, it is assumed that a diaphragm type coupling is used as the coupling 401. At the time of implementation, the type and specifications of the coupling 401 are not particularly limited.

The coupling cover 1 is provided with flange-shaped end walls 31 at both axial ends of a cylindrical peripheral wall 21 (hereinafter also referred to as “cover peripheral wall 21”) arranged on the outer peripheral side of the coupling 401. The cover body 11 having a curved shape is provided, and the coupling 401 is rotatably accommodated inside the cover body 11. A vent hole (exhaust port) 22 that communicates the inside and the outside of the cover body 11 is provided at the axial center of the cylindrical peripheral wall 21 and at one location on the circumference. A shaft hole 32 through which the drive shaft and the driven shaft are rotatably inserted is provided on each of the central axes of the flange-shaped end walls 31.

The coupling 401 and the coupling cover 1 may become hot as the coupling 401 rotates. The cover 1 of the present embodiment has a heat dissipation function. Various embodiments 1-35 of the coupling cover 1 having a heat radiation function will be 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 fin 41 is attached to the cover peripheral wall 21 by welding, for example.

In implementation, the fin 41 may be integrally provided on the cover body 11. The fact that the fins 41 may be integrally provided on 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 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 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 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 and the inner peripheral surface of the cover peripheral wall 21.

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

According to the first, second and third embodiments, part of the heat is transferred from the peripheral wall 21 of the cover body 11 to the fins 41, and the heat dissipation area of the cover 1 as a whole increases. Therefore, the heat radiation amount of the cover body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air agitation 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 the first, second and third embodiments described above, the fin 41 may be formed by winding a band-shaped material into a coil.

Embodiment 4
As shown in FIGS. 4A and 4B, in addition to the configuration of the third embodiment, the coupling cover 1 of the present embodiment has fins 41 provided on the inner peripheral surface of the cover peripheral wall 21. The angle is inclined with respect to the angle orthogonal to the axial direction. For convenience of description, the angle at which the fin 41 is inclined is referred to as an inclination angle θ ₁ . 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 fin 41 is a plane perpendicular to the axis of the cover peripheral wall 21 including the central axis of the vent hole 22 so as to guide the air flow generated in the cover body 11 toward the vent hole 22. It is an angle set with respect to (hereinafter referred to as “axis orthogonal plane 21A”). More specifically, the inclination angle θ ₁ is the smallest at a position on the same circumference where the axial distance between the fin 41 and the axis-perpendicular plane 21A is the same as the ventilation hole 22 (L ₁ ), and at the 180-degree symmetrical position. It is set to be the largest (L ₂ ). In other words, the inclination angle θ ₁ is set such that the axial distance between the fin 41 and the axis-perpendicular plane 21A becomes smaller as the inner circumferential surface of the cover peripheral wall 21 approaches the ventilation hole 22 on the circumference. There is.

According to this configuration, the air flow inside the cover body 11 is guided in the direction of the ventilation hole 22 by using the fins 41 as guides, so that the air having a relatively high heat relative to the outside air is easily released from the ventilation hole 22 to the outside of the cover 1. .. Therefore, the heat radiation amount of the cover body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air agitation resistance of the coupling 401 can be further reduced.

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

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

In the present embodiment, the configuration example in which the baffle plate 51 is added to the above-mentioned Embodiment 4 has been shown, but it goes without saying that the baffle plate 51 may be added to the above-mentioned Embodiments 1 to 3.

Sixth Embodiment
In the fifth embodiment, the baffle plate 51 is arranged in a direction parallel to a plane 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”). One example has been shown. As shown in FIG. 6, in the coupling cover 1 of the present embodiment, the baffle plate 51 is arranged at an inclination angle θ _{2 with} respect to the axial plane 21B. The inclination angle θ ₂ is set to an angle inclined with respect to the axial plane 21 </ _b > B in the air flow direction in the cover body 11 in FIG. 6.

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

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

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

Embodiment 8
In the fifth embodiment, as shown in FIG. 8A, the baffle plate 51 is formed of one flat plate. As shown in FIG. 8B, the baffle plate 51 of the coupling cover 1 of the present 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 ventilation holes 22 each having a circular plane shape. As a result, the baffle plate 51 is provided with an air receiving surface 52 surrounded by a V shape on the side receiving the air exhausted from the ventilation holes 22.

According to this configuration, the V-shape of the air receiving surface 52 changes the direction of the air flow toward the ventilation hole 22, 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 body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air agitation resistance of the coupling 401 can be further reduced.

In implementation, the two baffle plates 51 may be one baffle plate 51 formed in a V shape.

Ninth Embodiment
In the fifth embodiment, 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. 8C, the baffle plate 51 of the coupling cover 1 according to the present embodiment is formed in a curved shape that curves in the width direction. The width direction of the baffle plate 51 is the circumferential direction of the cover peripheral wall 21, that is, the vertical direction in FIG. 8C. As a result, the baffle plate 51 is provided with an air receiving surface 52 having a predetermined radius dimension on the side receiving the air exhausted from the ventilation holes 22. The air receiving surface 52 is arranged along the opening peripheral edge of the ventilation hole 22 having a circular plane shape.

According to this configuration, since the air flow changes its direction toward the ventilation hole 22 due to the curved shape of the air receiving surface 52, the flow rate of the air flowing toward the ventilation hole 22 further increases. Therefore, the heat radiation amount of the cover body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air agitation resistance of the coupling 401 can be further reduced.

Embodiment 10
As shown in FIG. 9A, in the present embodiment, the cover body 11 is provided with the protrusion 61 having an uneven shape. A plurality of protrusions 61 are provided as a radiator provided 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 circumferential direction.

According to this configuration, part of the heat is transferred from the peripheral wall 21 of the cover body 11 to the protrusions 61, and the heat dissipation area of the cover 1 as a whole is increased. Therefore, the heat radiation amount of the cover body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air agitation 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 implementation, the protrusion 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. The protrusion 61 may be a recess instead of this, and in this case, the heat dissipation area of the cover 1 as a whole increases, so that the amount of heat dissipation increases and the temperature of the coupling 401 and the cover 1 itself is lowered. Is possible.

Eleventh Embodiment
As shown in FIG. 9 (B) or (C), in the present embodiment, in addition to the configuration of the above-described tenth embodiment, a plurality of protrusions 61 are arranged in a row to form a concave-convex shape row 62, A plurality of the uneven shape rows 62 are arranged side by side. In the present embodiment, the uneven shape row 62 has a form in which the plurality of protrusions 61 are arranged in a line in the direction of arrow D. At the time of implementation, the plurality of protrusions 61 are not limited to one row, and may be arranged in a plurality of rows to form the concavo-convex shape row 62.

The air inside the cover body 11 gently flows in a certain direction as the coupling 401 rotates. The concavo-convex shape row 62 is inclined with respect to the axis-perpendicular plane 21A so as to guide the air flow inside the cover body 11 to the ventilation hole 22. The inclination angle of such a concavo-convex shape row 62 is set similarly to the fin 41 in the fourth embodiment.

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

Twelfth Embodiment
As shown in FIG. 10A, in the present embodiment, the cover body 11 is provided with fins 41 for heat dissipation. The fin 41 is formed in an annular shape along the peripheral wall 21 of the cover body 11. A plurality of such fins 41 are provided and are attached to the inner peripheral surface of the cover peripheral wall 21 at a constant pitch in the axial direction (the direction orthogonal to the paper surface in FIG. 10A). Protrusions 61 are provided on the surface of the fin 41 as a radiator for radiating heat having an uneven shape, and a plurality of protrusions 61 are arranged at a constant pitch in the radial direction and the circumferential direction.

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 also increases. Therefore, the heat radiation amount of the cover body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air agitation 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 the implementation, the protrusions 61 may be randomly arranged. The protrusion 61 may be a recess instead of this.

Embodiment 13
In the above-described twelfth embodiment, an example is shown in which the protrusions 61 are arranged in a line to form the concavo-convex shape row 62, and the concavo-convex shape row 62 is provided in the radial direction of the cover peripheral wall 21. As shown in FIG. 10B, in the present embodiment, the direction of the concave-convex shape row 62 is set to be spiral.

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

Embodiment 14
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 fin 41 is attached to the cover peripheral wall 21 by welding, for example.

The cover body 11 is also provided with a protrusion 61 having an uneven shape. A plurality of protrusions 61 are provided as a radiator provided 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 circumferential direction.

A plurality of protrusions 61 are also provided on the surface of the fin 41. The protrusion 61 provided on the fin 41 is also a radiator for radiating heat having an uneven shape.

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 protrusions 61. Further, the heat dissipation area of the entire cover 1 increases. Therefore, the heat radiation amount of the cover body 11 is increased, and the heat generation temperature of the coupling 401 and the coupling cover 1 caused by the air agitation 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.

Fifteenth Embodiment
As shown in FIGS. 12A and 12B, in the present 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 fin 41 is attached to the cover peripheral wall 21 by welding, for example.

In the coupling cover 1 of the present embodiment, the angle of the concave-convex shape row 62 formed by the fins 41 and the plurality of protrusions 61 provided on the inner peripheral surface of the cover peripheral wall 21 is inclined with respect to the angle orthogonal to the axial direction. ing. The inclination angles of the fins 41 and the concavo-convex shape row 62 are described as follows.

The air inside the cover body 11 gently flows in a certain direction as the coupling 401 rotates. The inclination angles of the fins 41 and the row of concavo-convex shapes 62 are such that the air flow generated inside the cover body 11 is guided in the direction of the ventilation holes 22. Is the angle set for. The inclination angle at this time is set similarly to the fin 41 in the fourth embodiment and the concave-convex shape 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.

Above, the first to fifteenth embodiments have been described. The concavo-convex shape of the 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 heat radiator may be a combination of the protrusion 61 and the recess.

The sixteenth to thirty-fifth embodiments described below are various embodiments of the protrusion 61 provided as the uneven shape of the radiator for heat dissipation in the above-described respective embodiments. These protrusions 61 may also be recesses or a combination of protrusions 61 and recesses. In FIGS. 13 (A), (B), (C), (D) to FIGS. 23 (A), (B), (C), (D), (E), and (F) showing Embodiments 16 to 35, arrows indicate air flows. Shows the direction of.

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

Seventeenth Embodiment
As shown in FIGS. 13B, 13 </ b> C, and 13 </ b> D, the planar shape of the protrusion 61 is a semicircle obtained by cutting a circle with a diameter line 63. The diameter line 63 is oriented parallel to or substantially parallel to the flow of air.

Embodiment 18
As shown in FIGS. 14 (A), (B), and (C), the planar shape of the protrusion 61 is a semicircle obtained by cutting a circle with a diameter line 63. The diameter line 63 is arranged on the upstream side of the air flow, and is oriented at a right angle to the air flow, or at a substantially right angle.

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

Embodiment 20
As shown in FIGS. 16 (A), (B), and (C), the planar shape of the protrusion 61 is an elliptical half shape obtained by cutting an elliptical shape with a long diameter line 64. The long diameter line 64 is oriented parallel to the flow of air, or is oriented substantially parallel to it.

Twenty-first embodiment
As shown in FIGS. 16D, 16E, and 16F, the planar shape of the protrusion 61 is an elliptical half shape obtained by cutting the elliptical shape with the minor axis line 65. The short-diameter line 65 is arranged on the upstream side of the air flow, and is oriented at a right angle to the air flow, or at a substantially right angle.

Twenty-second Embodiment
As shown in FIGS. 17 (A), (B), and (C), the planar shape of the protrusion 61 is a combination of an elliptical half portion 66 obtained by cutting an elliptical shape with a short-diameter line and a triangular portion 67. It has a shape in which the radial line and the base of the triangle are overlapped. The protrusion 61 directs the triangular portion 67 in the upstream direction of the air flow. The planar shape of the protrusion 61 is a line-symmetrical shape, and its center line 68 is oriented parallel to or substantially parallel to the air flow.

Twenty-third Embodiment
As shown in FIGS. 17 (D), (E), and (F), the planar shape of the protrusion 61 is a combination of an ellipse half portion 66 obtained by cutting an ellipse with a short diameter line and a triangular portion 67. It has a shape in which the radial line and the base of the triangle are overlapped. The protrusion 61 directs the triangular portion 67 in the downstream direction of the air flow. The planar shape of the protrusion 61 is a line-symmetrical shape, and its center line 68 is oriented parallel to or substantially parallel to the air flow.

Twenty-fourth Embodiment
As shown in FIGS. 18A, 18B, and 18C, the projection 61 has a diamond-shaped planar shape. The rhombus has its longer diagonal 69 oriented parallel or substantially parallel to the air flow.

Twenty-fifth Embodiment
As shown in FIGS. 18D, 18E and 18F, the projection 61 has a planar shape that is a rhombus half triangular shape obtained by cutting the rhombus with the diagonal line 69 that is the longer side thereof. The diagonal line 69 is oriented parallel to or substantially parallel to the flow of air.

Twenty-sixth Embodiment
As shown in FIGS. 19A, 19B, and 19C, the planar shape of the protrusion 61 is rectangular. The rectangular shape has its long side 70 oriented parallel or substantially parallel to the air flow.

Twenty-seventh Embodiment
As shown in FIGS. 19D and 19E, the projection 61 has a parallelogram planar shape. 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 shorter base 72 oriented upstream of the air flow. The base 72 is oriented at a right angle to the flow of air, or at a substantially right angle.

Twenty-ninth embodiment
As shown in FIGS. 20D, 20E, and 20F, the projection 61 has a trapezoidal planar shape. The trapezoid has its shorter base 72 directed downstream of the air flow. The base 72 is oriented at a right angle to the flow of air, or at a substantially right angle.

Embodiment 30
As shown in FIGS. 21 (A) (B) (C), the planar shape of the protrusion 61 is a trapezoidal shape obtained by cutting a triangle. The trapezoid and the 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 arranged on the upstream side of the air flow. The planar shape of the protrusion 61 is a line-symmetrical shape, and its center line 73 is oriented parallel to or substantially parallel to the air flow.

Embodiment 31
As shown in FIGS. 21D, 21E, and 21F, the planar shape of the protrusion 61 is a trapezoidal shape obtained by cutting a triangle. The trapezoid and the 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 arranged downstream of the air flow. The planar shape of the protrusion 61 is a line-symmetrical shape, and its center line 73 is oriented parallel to or substantially parallel to the air flow.

Twenty-third Embodiment
As shown in FIGS. 22 (A), (B), and (C), the planar shape of the protrusion 61 is a triangle and further isosceles triangle. The triangle has its base 74 arranged on the downstream side of the air flow, and is oriented at a right angle to the air flow or at a substantially right angle.

Embodiment 33
As shown in FIGS. 22D, 22E, and 22F, the planar shape of the protrusion 61 is a triangle (isosceles triangle). The base 74 of the triangle is located upstream of the air flow and is oriented at a right angle to the air flow or at a substantially right angle.

Embodiment 34
As shown in FIGS. 23 (A), (B), and (C), the planar shape of the protrusion 61 is a shape obtained by cutting a high-height triangle (isosceles triangle) to a low-height triangle (isosceles triangle). ing. Both triangles have their bases overlapping each other. The triangle has its apex 75 directed upstream of the air flow. The planar shape of the protrusion 61 is a line-symmetrical shape, and its center line 76 is oriented parallel to or substantially parallel to the air flow.

Embodiment 35
As shown in FIGS. 23D, 23E, and 23F, the projection 61 has a planar shape in which a high-height triangle (isosceles triangle) is cut out from a low-height triangle (isosceles triangle). ing. Both triangles have their bases overlapping each other. The triangle has its apex 75 directed downstream of the air flow. The planar shape of the protrusion 61 is a line-symmetrical shape, and its center line 76 is oriented parallel to or substantially parallel to the air flow.

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

1 Cover for Coupling 11 Cover Main Body 21 Peripheral Wall 21A Axis Right Angle Plane 22 Vent Hole 31 End Wall 32 Shaft Hole 41 Fin 51 Baffle Plate 52 Air Receiving Surface 61 Protrusion (Radiator)
62 Concavo-convex shape column 63 Diameter line 64 Long diameter line 65 Short diameter line 66 Part 67 Part 68 Center line 69 Diagonal line 70 Long side 71 Short side 72 Bottom side 73 Center line 74 Bottom side 75 Vertex 76 Center line 401 Coupling θ ₁ Inclination angle θ ₂ Inclination angle

Claims

A cover body that rotatably houses a coupling that connects the two shafts,
A fin for heat dissipation provided on the cover body,
Coupling cover with.
The cover body includes a tubular peripheral wall,
The fins are provided in plural in an annular shape along the peripheral surface of the peripheral wall,
The cover for coupling according to claim 1.
The fins are regularly arranged on the peripheral surface of the peripheral wall,
The cover for coupling according to claim 2.
The peripheral wall includes a ventilation hole that communicates the inside and outside of the cover body,
The fin is provided on an inner peripheral surface of the peripheral wall, and is inclined with respect to a plane perpendicular to the axis so as to guide the flow of air generated inside the cover main body in the direction of the vent hole.
The cover for coupling according to claim 2.
The inner peripheral surface of the peripheral wall is provided with a baffle plate that redirects the flow of air generated inside the cover body from the ventilation hole toward the outside of the cover body.
The cover for coupling according to claim 1.
The baffle plate projects inward from an inner peripheral surface of the peripheral wall on the downstream side of the air flow in the ventilation hole.
The cover for coupling according to claim 5.
The inner peripheral surface of the peripheral wall is provided with a baffle plate that redirects the flow of the air guided by the fins toward the ventilation hole from the ventilation hole to the outside of the cover body.
The coupling cover according to claim 4.
The baffle plate projects inward from an inner peripheral surface of the peripheral wall on the downstream side of the air flow in the ventilation hole.
The coupling cover according to claim 7.
A plurality of radiators for heat dissipation are provided on the peripheral surface of the peripheral wall,
The cover for coupling according to claim 2.
A cover body that rotatably houses a coupling that connects the two shafts,
A radiator for radiating heat having an uneven shape provided on the cover body;
Coupling cover with.
The cover body includes a tubular peripheral wall,
A plurality of the radiators are provided on the peripheral surface of the peripheral wall,
The cover for coupling according to claim 10.
The heat radiator is regularly arranged on the peripheral surface of the peripheral wall,
The coupling cover according to claim 11.
The peripheral wall includes a ventilation hole that communicates the inside and outside of the cover body,
The plurality of heat radiators are arranged in a row on the inner peripheral surface of the peripheral wall to form a plurality of concave-convex shape rows,
The concavo-convex shape row is inclined with respect to a plane perpendicular to the axis so as to guide the flow of air generated inside the cover main body in the direction of the ventilation hole,
The coupling cover according to claim 11.
A cover body that rotatably houses a coupling that connects the two shafts,
A fin for heat dissipation provided on the cover body,
A radiator for radiating heat having an uneven shape provided on the surface of the fin,
Coupling cover with.
The cover body includes a tubular peripheral wall,
The fins are provided in a plurality of annular shapes along the peripheral surface of the peripheral wall,
A plurality of the radiators are provided on the surface of the fin,
The cover for coupling according to claim 14.
The fin is provided on the inner peripheral surface of the peripheral wall,
The plurality of heat radiators are arranged in a row on the surface of the fin to form a plurality of rows and columns of uneven shapes,
The concavo-convex shape row is inclined with respect to a plane parallel to the axis so as to guide the flow of air generated inside the cover main body in the direction of the inner peripheral surface of the peripheral wall.
The coupling cover according to claim 15.