JP2001012520A - Disk rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress fluid loss of air flow in a ventilation hole, and improve cooling efficiency by making an attaching angle of a plurality of cooling ribs differ from each other at an inner circumferential side and an outer peripheral side of an annular rotor part of the ventilation hole viewing a line which is vertically connected a pair of sliding plates in the annular rotor part, and enlarging it at the outer peripheral side. SOLUTION: When a disk rotor body 1 is rotated in association with advance of wheels, air remaining in a ventilation hole 5 in an annular rotor part 2 flows toward an outer peripheral side while approaching one ventilation hole surface 4A in cooling ribs 4, and in blown off near an inner rotor 2A of the ventilation hole 5 at the outer peripheral side of the rotor body 1. Each cooling rib 4 is formed so as to increase an attaching inclining degree to each plate surface of both inner and outer rotors 2A, 2B in compliance with that both ventilation hole surfaces 4A, 4B for partitioning the ventilation hole 5 into both sides of the circumferential direction of the cooling rib 4 extend from the inner circumferential direction toward the outer peripheral side in relation to its extending direction. Accordingly, it is thus possible to improve cooling efficiency by suppressing fluid loss caused by interference of flow lines.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk rotor used for a disk brake, and more particularly to a ventilated disk rotor having a ventilation hole and a cooling rib.

[0002]

2. Description of the Related Art Generally, a disk rotor is provided with an annular rotor portion, which is pinched by a pair of brake pads, on an outer peripheral side, and an inner peripheral side is provided with a mounting portion mounted on a wheel shaft. The rotation of the disk rotor is braked by frictional force generated when the annular rotor portion of the disk rotor rotating with the wheel is pinched by a pair of brake pads attached to the non-rotating vehicle body. .

[0003] The disc rotor is heated by frictional heat generated between the disc rotor and the brake pad during braking. This heat causes deformation of the disc rotor due to thermal expansion, and the flatness is reduced by the deformation. When the brake pad hits the disk rotor, vibrations that occur on the vehicle body during braking, so-called judder, may occur.

In order to prevent this, as shown in FIG. 14, cooling ribs and ventilation holes are radially provided in the annular rotor portion of the disk rotor, and when the disk rotor rotates, air in the ventilation holes is centrifugally forced to release air in the annular rotor portion. The outside air is exhausted from the opening provided on the outer peripheral side, and the outside air is brought into the negative pressure state. 2. Description of the Related Art A ventilated disk rotor has been disclosed, which has a mechanism for creating a flow of air in a rotor portion and cooling a disk rotor heated by the flow of air.

[0005]

In the conventional ventilated disk rotor, the cooling rib 104 has a surface 104A defining ventilation holes on both circumferential sides from the inner peripheral end 104a to the outer peripheral end 104b. Reference numeral 104B is a surface perpendicular to the inner rotor sliding surface 102A 'and the outer rotor sliding surface 102B' of the annular rotor portion 102 of the disk rotor. That is, the inner rotor 102A of the annular rotor portion 102 of the cooling rib 104
Alternatively, the joint portion to the outer rotor 102B does not shift between the inner rotor 102A and the outer rotor 102B in the disk circumferential direction at any part in the disk radial direction.

Here, the flow of air in the vent hole is shown in FIG.
As shown in the figure, the streamline E10 in which air flows in the centrifugal direction due to the rotation of the disk rotor in the rotation direction ω becomes the mainstream, and the streamlines F010 and F10 located in the rotation direction more than the streamline E10 form a vortex. It becomes an air pocket accompanying it.

In such a flow, although the cooling efficiency of the ventilation hole surface 104A formed by the cooling rib 104 on the rear side in the rotation direction with respect to the ventilation hole by the main flow E10 is good, the cooling on the rotation direction front side with respect to the ventilation hole is good. In the ventilation hole surface 104B formed by the rib 104, the streamline F010 forms an air pocket, so that the cooling efficiency is reduced by half, and the heat radiating area of the cooling rib 104 as a cooling fin can be utilized only about half. is there.

Further, in the flow line F010, since the vortex is accompanied, the cross-sectional area of the main rotor E10 on the outer peripheral side of the annular rotor portion becomes smaller than that on the inner peripheral side, so that the flow rate of air decreases. Also, the flow of the spiral flow line F010 toward the center of the disk rotor and the flow of the main flow E10 toward the outer periphery of the rotor interfere with each other, resulting in fluid loss. As a result, air in the centrifugal direction as a whole in the vent hole. There is a problem that the flow rate of the water is further reduced.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises an annular rotor portion which is pinched by a pair of brake pads on an outer peripheral side, wherein the annular rotor portion has a pair of sliding plates. A cooling rib radially extending inside the annular rotor portion by bridging the pair of sliding plates, and a ventilator having a combination of a ventilation hole adjacent to the cooling rib and arranged continuously in a circumferential direction. In the ted type disk rotor, the mounting angles of the plurality of cooling ribs as viewed from a line that vertically connects the pair of sliding plates are mounted to be different between the inner peripheral side and the outer peripheral side of the annular rotor portion of the ventilation hole, and The mounting angle on the outer peripheral side is larger than the mounting angle on the inner peripheral side.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk rotor according to a first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a partially cutaway front view, a radial cross-sectional view, and a circumferential development view of an inner peripheral side and an outer peripheral side of an annular rotor portion according to a first embodiment of the present invention. FIG. 2 is a diagram showing the flow of air in the annular rotor portion.

In FIG. 1, reference numeral 1 denotes a disk rotor main body, and an outer peripheral portion of the disk rotor main body 1 is an annular rotor portion 2 which is pressed by a pair of brake pads (not shown).

On the other hand, the inner peripheral portion of the disk rotor main body 1 has a bottomed cylindrical portion having an open end connected to the inner peripheral portion of the annular rotor portion 2 and arranged coaxially with the annular rotor portion 2. Mounting portion 3.

A plurality of fixing holes 3A are provided in the bottom plate portion of the mounting portion 3 for use when the disk rotor body 1 is coaxially fixed to a wheel (not shown) with bolts or the like.

The annular rotor portion 2 has therein a cooling rib 4 radially extending from an inner peripheral side to an outer peripheral side,
A plurality of combinations of the cooling ribs 4 and the adjacent ventilation holes 5 are arranged continuously in the circumferential direction.

Thus, the annular rotor portion 2 is divided into an inner rotor 2A (sliding plate) and an outer rotor 2B (sliding plate) with respect to the axial direction, with the combined portion of the cooling rib 4 and the ventilation hole 5 interposed therebetween. Can be

The inner rotor 2A and the outer rotor 2B have an inner rotor sliding surface 2 on which the inner brake pad slides when pressed by the brake pad.
A ′ and an outer rotor sliding surface 2B ′ on which the outer brake pad slides are formed.

Here, in the case of the present embodiment, a plurality of the cooling ribs 4 provided so as to connect the inner rotor 2A and the outer rotor 2B in the axial direction are arranged at equal intervals θ in the circumferential direction of the annular rotor portion 2. ing.

As a result, the ventilation holes 5 are defined between the adjacent cooling ribs 4 and 4, so that a plurality of the ventilation holes 5 defined in the circumferential direction are arranged at equal intervals θ in the circumferential direction. .

Further, in the case of the present embodiment, the individual cooling ribs 4 radially extending from the inner peripheral side to the outer peripheral side of the annular rotor portion 2 are connected to the inner rotor 2A at the connection position,
At the inner peripheral end 4a of the cooling rib 4, the connection position with respect to the outer rotor 2B coincides with the circumferential position of the inner rotor 2A and the outer rotor 2B, and coincides (opposes) with the axial direction of the annular rotor 2. On the other hand, the outer circumferential end 4b of the cooling rib 4 has a deviation δ with respect to the circumferential position of the inner rotor 2A and the outer rotor 2B, and does not match (do not face) the axial direction of the annular rotor portion 2. ing.

As a result, the individual cooling ribs 4 are formed such that the inner rotor 2A and the outer rotor 2B are perpendicular to the plate surface of the inner rotor 2A and the plate surface of the outer rotor 2B at the inner peripheral end 4b. Although the gap is bridged, the outer peripheral end 4b has a slope αmax (about 4 max) with respect to the plate surface of the inner rotor 2A and the plate surface of the outer rotor 2B.
At an angle of 5 degrees, the inner rotor 2A and the outer rotor 2B are bridged.

That is, each cooling rib 4 is formed such that one ventilation hole surface 4A and the other ventilation hole surface 4B which define ventilation holes 5 on both sides in the circumferential direction are formed from the inner peripheral side to the outer peripheral side in the extending direction. , The mounting inclination α with respect to the plate surface of the inner rotor 2A and the plate surface of the outer rotor 2B increases (0
(Approximately 45 degrees).

Next, the first embodiment of the present invention constructed as described above will be described.
The operation of the disk rotor according to the embodiment will be described.

When the disk rotor body 1 also rotates in the rotational direction ω about its axis by the forward rotation of the wheels (not shown), the air remaining in one ventilation hole in the annular rotor portion 2 is provided with cooling ribs. 4, the movement in the circumferential direction is restricted by the one vent surface 4A and the other vent surface 4B, but the movement in the radial direction is not restricted. Due to the generated centrifugal force, as shown in FIG. 2, with respect to the rotation direction ω of the disk rotor main body 1, the gas flows toward the outer peripheral side while approaching the rear vent surface, that is, one vent surface 4A of the cooling rib 4. A flow occurs as shown by stream line E.

Since the flow of the streamline E flows while approaching the vent hole surface 4A, the streamline E
The air blows out toward the inner rotor 2 </ b> A of the ventilation hole 5.

At this time, each cooling rib 4 is formed such that one ventilation hole surface 4A and the other ventilation hole surface 4B which define ventilation holes 5 on both sides in the circumferential direction are formed on the inner circumferential side with respect to the extending direction. , The mounting inclination α with respect to the plate surface of the inner rotor 2A and the plate surface of the outer rotor 2B increases (0 to approximately 45 degrees), so that the air flows more than the conventional rib having no inclination angle. However, the flow of air on the one ventilation hole surface 4A of the cooling rib 4 is caused by part of the rotation work of the disk rotor body 1 being converted into kinetic energy of air. Therefore, the flow E of air on one ventilation hole surface 4A of the cooling rib 4 can obtain substantially the same flow rate as that of the conventional rib irrespective of the pipe resistance.

The other ventilation hole surface 4B of the cooling rib 4
Are formed in the outer peripheral side in the same direction as the one vent surface 4A.
Due to the bulging portion that protrudes inside, the air flow of stream line F0, which has been an air pocket with a vortex in the prior art ventilated disk rotor,
As shown in FIG. 2, the area of the air vent surface 4B that becomes an air reservoir is reduced by the overhanging portion, and more air flows to the outer peripheral side.

In the flow of the stream line F0, the air is blown toward the outer rotor 2B of the ventilation hole 5 on the outer peripheral side of the disk rotor because the ventilation hole surface 4B is inclined.

For this reason, most of the air flows in the air holes 5 are directed toward the outer periphery of the disk rotor, so that a flow with small fluid loss due to interference between stream lines can be realized.

Further, in the disk rotor of this embodiment, the cooling ribs 4 are only inclined in the axial direction with respect to the cooling ribs of the prior art. It has the same volume as the rotor and the same pressure loss due to the cross-sectional area of the flow path.

However, in the disk rotor of this embodiment, since the cooling ribs 4 have the inclination α, the area of the ventilation hole surface of the cooling ribs is larger than that of the conventional cooling ribs, and the heat radiation area is small. It is more than the cooling rib of the prior art.

From the above, even with the same cooling air flow as the conventional disk rotor, the disk rotor of the present embodiment can improve the cooling efficiency and lower the rotor temperature.

In this embodiment, the cooling rib 4
Is bridged so as to be perpendicular to the inner rotor 2A and the outer rotor 2B at the inner peripheral end 4a, but is not limited to this. For example, as shown in FIG. It may be provided with any small deviation δ ′.

At this time, the deviation δ on the outer peripheral side and the deviation δ ′ on the inner peripheral side need not be the same direction.

Further, in the present embodiment, the inclination α of the outer peripheral end is set to 45 degrees. However, the present invention is not limited to this.
Any other angle may be used as long as it is an angle at which the air efficiently flows through the vent hole and is larger than the mounting angle of the cooling rib at the inner peripheral end.

In this embodiment, the cooling rib 4
Is set in the direction opposite to the rotation direction ω toward the outer rotor 2B side, but is not limited to this, and the direction of the rotation ω toward the inner rotor 2A side is not limited to this. May be shifted in the opposite direction.

In the present embodiment, the cooling rib 4
Although the vent hole surfaces 4A and 4B are provided in a radially planar shape, the present invention is not limited to this, and as shown in FIG. 4, the vent holes 4A and 4B may be provided in a curved shape having an arbitrary curvature in the radial direction. It may be a complex curved surface having an arbitrary curvature.

Next, a disk rotor according to a second embodiment of the present invention will be described with reference to FIGS.

FIG. 5 is a partially cutaway front view, a radial cross-sectional view, and a circumferentially developed view of the inner and outer circumferential portions of the annular rotor portion of the disk rotor according to the second embodiment of the present invention. FIG. 6 is a diagram showing the flow of air in the annular rotor portion.

In the figure, reference numeral 11 denotes a disk rotor body,
An outer peripheral portion of the disk rotor main body 11 is provided with an annular rotor portion 12 which is pressed by a pair of brake pads (not shown).
It has become.

On the other hand, the inner peripheral side portion of the disk rotor body 11 has a bottomed cylindrical portion having an open end connected to the inner peripheral portion of the annular rotor portion 12 and arranged coaxially with the annular rotor portion 12. Mounting portion 13.

A plurality of fixing holes 13A are provided in the bottom plate portion of the mounting portion 13 for use when the disk rotor body 11 is coaxially fixed to a wheel (not shown) with bolts or the like.

The annular rotor portion 12 has a cooling rib 14 radially extending from the inner peripheral side to the outer peripheral side.
And a plurality of combinations of the cooling ribs 14 and the adjacent ventilation holes 15 are arranged continuously in the circumferential direction.

Thus, the annular rotor portion 12 is divided into an inner rotor 12A (sliding plate) and an outer rotor 12B (sliding plate) with respect to the axial direction, with the combined portion of the cooling rib 14 and the ventilation hole 15 interposed therebetween. Can be

When the inner rotor 12A and the outer rotor 12B are pressed by the brake pads,
An inner rotor sliding surface 12A 'on which the inner brake pad slides and an outer rotor sliding surface 12B' on which the outer brake pad slides are formed.

Here, in the case of the present embodiment, the cooling ribs 14 provided so as to connect the inner rotor 12A and the outer rotor 12B in the axial direction are arranged at equal intervals θ in the circumferential direction of the annular rotor portion 12 on the inner circumferential side. Are arranged in plurals.

As a result, ventilation holes 15 are defined between the adjacent cooling ribs 14, 14, and a plurality of ventilation holes 15 defined in the circumferential direction are also arranged at equal intervals θ in the circumferential direction on the inner circumferential side. The Rukoto.

Further, in the case of the present embodiment, the individual cooling ribs 14 extending radially from the inner peripheral side to the outer peripheral side of the annular rotor section 12 have a connection position with respect to the inner rotor 12A and a connection position with respect to the outer rotor 12B. At the inner peripheral end 14a of the cooling rib 14, the inner rotor 12A
The outer peripheral end 14b of the cooling rib 14 has the inner rotor 12A and the outer rotor 12B at the outer peripheral end 14b of the cooling rib 14. The cooling ribs 14 adjacent to each other with respect to the circumferential position have a shift δ in opposite directions, and do not match (do not face) the axial direction of the annular rotor portion 12.

As a result, each cooling rib 14 has its inner peripheral end 14a formed between the inner rotor 12A and the outer rotor 12B so as to be perpendicular to the plate surface of the inner rotor 12A and the plate surface of the outer rotor 12B. The cooling ribs 14 adjacent to each other have an inclination αmax (approximately 45 degrees) in opposite directions with respect to the plate surface of the inner rotor 12A and the plate surface of the outer rotor 12B. At an angle, the inner rotor 1
2A and the outer rotor 12B are bridged.

That is, each cooling rib 14 has one ventilation hole surface 14A defining ventilation holes 15 on both circumferential sides.
And the other vent surface 14B,
The inner rotor 12A extends from the inner peripheral side to the outer peripheral side.
Of the outer rotor 12B and the plate surface of the outer rotor 12B are increased (0 to approximately 45 degrees).

Next, the second embodiment of the present invention constructed as described above will be described.
The operation of the disk rotor according to the embodiment will be described.

When the disk rotor main body 11 also rotates in the rotational direction ω about its axis by the forward rotation of the wheels (not shown), the air remaining in one air hole in the annular rotor portion 12 has cooling ribs. 14 one vent surface 14
Although the movement in the circumferential direction is restricted by A and the other air hole surface 14B, the movement is not restricted in the radial direction.
Due to the rotation of the disk rotor main body 11 and the centrifugal force generated by the rotation, as shown in FIG. A flow is generated like a streamline E1 flowing toward the outer peripheral side while approaching the surface 14A.

At this time, the individual cooling ribs 14 are attached to the plate surface of the inner rotor 12A and the plate surface of the outer rotor 12B in such a manner that the adjacent cooling ribs 14 extend in the opposite directions from the inner peripheral side to the outer peripheral side. Increase α (0
(Approximately 45 degrees), and the pipeline resistance when air flows is larger than that of a conventional rib having no inclination angle. However, the air flow on one ventilation hole surface 14A of the cooling rib 14 is not The flow is caused by a part of the rotating work of the disk rotor body 11 being converted into kinetic energy of air,
The flow E1 of air on one ventilation hole surface 14A of the cooling rib 14 can obtain substantially the same flow rate as that of the conventional rib irrespective of the pipe resistance.

The other ventilation hole surface 1 of the cooling rib 14
4B has a protruding portion on the outer peripheral side that protrudes into the vent hole 15 in the same direction as the one vent surface 14A, so that the ventilated disk rotor of the prior art forms an air pocket with a vortex. As shown in FIG. 6, the flow of the air flowing through the stream line F <b> 01 has a reduced area where an air pocket is formed due to the protruding portion of the other vent hole surface 14 </ b> B, and a large amount of air flows to the outer peripheral side.

Here, the flow of the streamline E1 flows while approaching the inclined vent surface 14A, and the flow of the streamline F01 flows while being pushed by the inclined vent surface 14B. For both E and F01, the inner rotor 12A side or the outer rotor 12
It is divided and blown out to the B side, so that interference between stream lines does not occur.

For this reason, the flow of the air in the ventilation hole 15 mostly flows toward the outer peripheral side of the disk rotor, and a flow with a small fluid loss due to the interference between stream lines can be realized.

Further, in the disk rotor of the present embodiment, the cooling ribs 14 are merely inclined in the axial direction with respect to the cooling ribs of the prior art, so that the internal space of the vent hole has the same volume as that of the conventional technology, The pressure loss due to the road cross-sectional area is the same.

However, in the disk rotor according to the present embodiment, since the cooling ribs 14 have an inclination angle,
The area of the ventilation hole surface of the cooling rib is larger than that of the prior art cooling rib, and the heat radiation area is larger than that of the prior art cooling rib.

From these facts, even with the same cooling air volume as the conventional disk rotor, the disk rotor of the present embodiment can improve the cooling efficiency and lower the rotor temperature.

In this embodiment, the cooling rib 1
4 is bridged so as to be perpendicular to the inner rotor 12A and the outer rotor 12B at the inner peripheral end 14a, but is not limited to this. For example, as shown in FIG. In the direction, any deviation δ ′ smaller than the deviation δ at the outer peripheral end may be provided.

At this time, the deviation δ on the outer peripheral side and the deviation δ ′ on the inner peripheral side are in opposite directions in FIG. 7, but may be in the same direction.

Further, in the present embodiment, the inclination α of the outer peripheral end is set to 45 degrees, but the present invention is not limited to this.
Any other angle may be used as long as it is an angle at which the air efficiently flows through the vent hole and is larger than the mounting angle of the cooling rib at the inner peripheral end.

In this embodiment, the cooling rib 1
4, the vent hole surfaces 14A and 14B are provided in a plane in the radial direction, but the present invention is not limited to this. As shown in FIG. 8, the vent holes 14A and 14B are provided in a curved surface having an arbitrary curvature in the radial direction. Or a composite curved surface having an arbitrary curvature.

Next, a disk rotor according to a third embodiment of the present invention will be described with reference to FIGS.

FIG. 9 is a partially cutaway front view, a radial cross-sectional view, and a developed view in the circumferential direction of the inner side and outer side of the annular rotor portion of the disk rotor according to the third embodiment of the present invention. FIG. 10 is a diagram showing the flow of air in the annular rotor portion.

In the figure, reference numeral 21 denotes a disk rotor body.
An outer peripheral portion of the disk rotor main body 21 has an annular rotor portion 22 that is pressed by a pair of brake pads (not shown).
It has become.

On the other hand, the inner peripheral portion of the disk rotor body 21 has a bottomed cylindrical portion having an open end connected to the inner peripheral portion of the annular rotor portion 22 and arranged coaxially with the annular rotor portion 22. Mounting portion 23.

A plurality of fixing holes 23A are provided in the bottom plate of the mounting portion 23 for use in fixing the disk rotor body 21 coaxially to a wheel (not shown) with bolts or the like.

The annular rotor portion 22 includes cooling ribs 24 radially extending from the inner peripheral side to the outer peripheral side.
And a plurality of combinations of the cooling ribs 24 and the adjacent ventilation holes 25 are arranged continuously in the circumferential direction.

Thus, the annular rotor portion 22 is divided into an inner rotor 22A (sliding plate) and an outer rotor 22B (sliding plate) with respect to the axial direction, with the combined portion of the cooling rib 24 and the ventilation hole 25 interposed therebetween. Can be

Here, in the case of this embodiment, the cooling ribs 24 provided so as to connect the inner rotor 22A and the outer rotor 22B in the axial direction are arranged at equal intervals θ in the circumferential direction of the annular rotor portion 22 on the inner circumferential side. Are arranged in plurals.

As a result, ventilation holes 25 are defined between the adjacent cooling ribs 24, 24, and a plurality of ventilation holes 25 defined in the circumferential direction are also arranged at equal intervals θ in the circumferential direction on the inner circumferential side. The Rukoto.

Further, in the case of the present embodiment, the individual cooling ribs 24 radially extending from the inner peripheral side to the outer peripheral side of the annular rotor portion 22 are arranged such that the connection position to the inner rotor 22A and the connection position to the outer rotor 22B are: At the inner peripheral end 24a of the cooling rib 24, the inner rotor 22A
The outer rotor 22 </ b> B and the outer rotor 22 </ b> B coincide with each other in the circumferential direction, and coincide with (oppose) the axial direction of the annular rotor portion 22.

On the other hand, at the outer peripheral end 24b of the cooling rib 24, of the three adjacent cooling ribs 24, the middle cooling rib 24 has the inner rotor 22A and the outer rotor 24A at the outer peripheral end 24b. Outer rotor 22B
In the circumferential position of the annular rotor portion 22
Is aligned (opposed) in the axial direction of
The cooling ribs 24 located on one side and the other in the circumferential direction of the middle cooling rib 24 are provided at the outer peripheral end 24 b at the inner rotor 2.
2A and the outer rotor 22B are displaced in opposite directions with respect to the circumferential position, and the annular rotor portion 22
(Not opposed) in the axial direction.

As a result, each of the cooling ribs 24 has its inner peripheral end 24a formed between the inner rotor 22A and the outer rotor 22B so as to be perpendicular to the plate surface of the inner rotor 22A and the plate surface of the outer rotor 22B. At the outer peripheral end 24b, the middle cooling rib 24 of the three adjacent cooling ribs 24 with respect to the plate surface of the inner rotor 22A and the plate surface of the outer rotor 22B is formed. Are vertically inclined, and the cooling ribs 24 on both sides of the middle cooling rib 24 are inclined in opposite directions to each other.
The inner rotor 22A and the outer rotor 22B are bridged at an angle of about 45 degrees.

That is, the cooling ribs 24 on both sides are provided on one side of the ventilation hole surface 24 defining the ventilation holes 25 on both sides in the circumferential direction.
A and the other air hole surface 24B extend from the inner peripheral side to the outer peripheral side with respect to the extending direction thereof, so that the inner rotor 2
The mounting inclination α with respect to the plate surface of 2A and the plate surface of the outer rotor 22B is increased (0 to approximately 45 degrees).

Next, the third embodiment of the present invention constructed as described above will be described.
The operation of the disk rotor according to the embodiment will be described.

When the disk rotor body 21 also rotates in the rotational direction ω about its axis by the forward rotation of the wheels (not shown), the air staying in one air hole in the annular rotor portion 22 is cooled by cooling ribs. 24, one vent surface 24
Although the movement in the circumferential direction is restricted by A and the other air hole surface 24B, since the movement in the radial direction is not restricted,
Due to the rotation of the disk rotor main body 21 and the centrifugal force generated by the rotation, as shown in FIG. A flow is generated like a streamline E2 flowing toward the outer peripheral side while approaching the surface 24A.
At this time, the cooling ribs 24 on both sides are connected to the outer rotor 2.
4B has an inclination angle, and the pipe resistance when air flows is larger than that of a conventional rib having no inclination angle. Is caused by a part of the rotation work of the disk rotor body 21 being converted into kinetic energy of air, so that one of the ventilation holes 24A of the cooling ribs 24 on both sides is formed.
The above air flow E2 can obtain substantially the same flow rate as the conventional ribs regardless of the pipe resistance.

Since the other ventilation hole surface 24B of the cooling ribs 24 on both sides has an overhanging portion that extends into the ventilation hole 25 on the outer peripheral side in the same direction as the one ventilation hole surface 24A, the conventional technology is not used. In the ventilated type disk rotor of the above, the streamline F which was an air pool with a vortex
As shown in FIG. 10, the air flow of 02 has a small area that becomes an air pocket due to the protruding portion of the other ventilation hole surface 24 </ b> B, and a large amount of air flows to the outer peripheral side.

Here, in the vent hole 25 having the inclined vent surface, the air flow is controlled by the inclined vent surface on the outer peripheral side of the disk rotor.
The air is separately blown to the A side or the outer rotor 22B side, and no interference occurs between stream lines.

For this reason, the flow of air in the vent hole 25 having the inclined vent surface is mostly a flow toward the outer periphery of the disk rotor, and a flow with a small fluid loss due to interference between stream lines can be realized. Can be.

For this reason, most of the air flows in the ventilation holes 25 flow toward the outer periphery of the disk rotor, and a flow in which fluid loss due to interference between stream lines is small can be realized.

Also, in the disk rotor of this embodiment, the cooling ribs 24 on both sides are only inclined with respect to the axial direction with respect to the cooling rib of the prior art, so that the internal space of the vent hole is the same volume as that of the prior art. And the pressure loss due to the cross-sectional area of the flow path is the same.

However, in the disk rotor of this embodiment, since the cooling ribs 24 on both sides are inclined, the area of the ventilation hole surface of the cooling rib is larger than that of the conventional cooling rib, and the heat radiation The area is increased over prior art cooling ribs.

From these facts, even with the same cooling air volume as the conventional disk rotor, the disk rotor of the present embodiment can improve the cooling efficiency and lower the rotor temperature.

In this embodiment, the cooling rib 2
4 is bridged so as to be perpendicular to the inner rotor 22A and the outer rotor 22B at the inner peripheral end 24a, but is not limited thereto. For example, as shown in FIG. 11, the cooling ribs 24 on both sides are opposite to each other. In the direction, any deviation δ ′ smaller than the deviation δ at the outer peripheral end may be provided.

At this time, the deviation δ on the outer peripheral side and the deviation δ ′ on the inner peripheral side are in opposite directions in FIG.
The displacement may be in the same direction.

In the present embodiment, the cooling rib 2
2 includes three cooling ribs 24, which are perpendicular to the inner rotor 22A and the outer rotor 22B when viewed from the outer peripheral side, and two inclined cooling ribs 24 arranged on both sides of which the inclination directions are set to be opposite to each other. As one combination,
A plurality of such combinations are arranged at equal intervals in the circumferential direction. However, the present invention is not limited to this. As shown in FIG. 12, cooling ribs 24 vertically bridged to the inner rotor 22A and the outer rotor 22B, Two inclined cooling ribs 2 whose inclined directions are set to be the same as each other
Four of the four may be one combination.

Further, in the present embodiment, the inclination α of the outer peripheral end side is set to 45 degrees. However, the present invention is not limited to this.
Any other angle may be used as long as it is an angle at which the air efficiently flows through the vent hole and is larger than the mounting angle of the cooling rib at the inner peripheral end.

In the present embodiment, the cooling rib 2
4, the vent hole surfaces 24A and 24B are provided in a plane in the radial direction, but are not limited to this. As shown in FIG. 13, the vent holes 24A and 24B are provided in a curved surface having an arbitrary curvature in the radial direction. Or a composite curved surface having an arbitrary curvature.

Note that, in the third embodiment of the present invention,
In the disk rotor, the cooling ribs bridged perpendicularly to the disk rotor axis direction and the cooling ribs bridged while having a deviation are regularly mixed, so that the annular rotor portion was pressed by the pair of brake pads. In this case, the static rigidity in the axial direction of the annular rotor portion changes, thereby preventing the disk rotor from having inherent nodes and antinodes of vibration, so that so-called judder can be prevented.

[0092]

As described above, according to the present invention, the annular rotor portion which is pinched by the pair of brake pads is provided on the outer peripheral side, and the annular rotor portion includes the pair of sliding plates and the pair of sliding plates. In a ventilated disk rotor in which a combination of a cooling rib radially extending inside the annular rotor portion by bridging a plate and a ventilation hole adjacent to the cooling rib is continuously arranged in a circumferential direction, The mounting angles of the plurality of cooling ribs, as viewed from a line connecting the pair of sliding plates vertically, are mounted such that the inner circumferential side and the outer circumferential side of the annular rotor portion of the ventilation hole are different, and the mounting angle on the outer circumferential side is different. By being characterized in that it is larger than the mounting angle on the inner peripheral side, the flow of air in the ventilation hole becomes a flow with small fluid loss, the heat radiation area in the ventilation hole increases, and the disk rotor with high cooling efficiency It is possible to provide.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view, a radial cross-sectional view, and a circumferential development view of an inner peripheral end and an outer peripheral end of an annular rotor portion according to a first embodiment of the present invention.

FIG. 2 is a view showing a state in which air flows through a ventilation hole of the disk rotor according to the first embodiment of the present invention.

FIG. 3 shows a first example of the disk rotor according to the first embodiment of the present invention.
It is a partial cut-away front view of a modification, and a peripheral direction development view of an inner peripheral end and an outer peripheral end of an annular rotor portion.

FIG. 4 shows a second example of the disk rotor according to the first embodiment of the present invention.
It is a partial cut front view of a modification.

FIG. 5 is a partially cut front view of a disk rotor according to a second embodiment of the present invention, and a circumferential development of an inner peripheral end and an outer peripheral end of an annular rotor portion.

FIG. 6 is a view showing a state in which air flows through a ventilation hole of a disk rotor according to a second embodiment of the present invention.

FIG. 7 shows a first example of the disk rotor according to the second embodiment of the present invention.
It is a partial cut-away front view of a modification, and a peripheral direction development view of an inner peripheral end and an outer peripheral end of an annular rotor portion.

FIG. 8 shows a second example of the disk rotor according to the second embodiment of the present invention.
It is a partial cut front view of a modification.

FIG. 9 is a partially cut front view of a disk rotor according to a third embodiment of the present invention, and a circumferential development of an inner peripheral end and an outer peripheral end of an annular rotor portion.

FIG. 10 is a diagram illustrating a state in which air flows through a vent hole of a disk rotor according to a third embodiment of the present invention.

FIG. 11 is a partially cutaway front view of a first modification of the disk rotor according to the third embodiment of the present invention, and is a development view in the circumferential direction of the inner peripheral end and the outer peripheral end of the annular rotor portion.

FIG. 12 is a partially cut front view of a second modified example of the disk rotor according to the third embodiment of the present invention, and is a developed view in the circumferential direction of the inner peripheral end and the outer peripheral end of the annular rotor portion.

FIG. 13 is a partially cut front view of a third modification of the disk rotor according to the third embodiment of the present invention.

FIG. 14 is a partially cut front view, a radial cross-sectional view, and a circumferential development view of an inner peripheral end and an outer peripheral end of an annular rotor portion of a conventional disk rotor.

FIG. 15 is a diagram showing a state in which air flows in a ventilation hole of a disk rotor according to the related art.

[Explanation of symbols]

 Reference Signs List 1 disk rotor body 2 annular rotor portion 2A inner rotor 2B outer rotor 2A 'inner rotor sliding surface 2B' outer rotor sliding surface 3 mounting portion 3C fixing hole 4 cooling rib 4a inner peripheral end 4b outer peripheral end 4A ventilation hole surface 4B ventilation hole surface 5 ventilation holes

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jun Takano 1-6-3 Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa F-term in Tokiko Corporation (reference) 3J058 AA41 BA37 BA80 CB23 CB25 DE02 FA01 FA11 FA21

Claims (1)

[Claims] 1. An annular rotor portion sandwiched between a pair of brake pads is provided on an outer peripheral side, and the annular rotor portion is formed by bridging a pair of sliding plates and the pair of sliding plates. In a ventilated disk rotor in which a combination of cooling ribs extending radially inside and a cooling hole and a ventilation hole adjacent thereto is continuously arranged in the circumferential direction,
The mounting angles of the plurality of cooling ribs, as viewed from a line connecting the pair of sliding plates vertically, are mounted such that the inner circumferential side and the outer circumferential side of the annular rotor portion of the ventilation hole are different, and the mounting angle on the outer circumferential side is different. A disk rotor characterized by being larger than a mounting angle on an inner peripheral side.