JP3724141B2 - Disc rotor for brake - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a pair of annular sliding plates clamped by opposing left and right brake pads, and a plurality of cooling fins extending radially inside the annular sliding plates and disposed along the circumferential direction. And a brake disk rotor in which the thickness of some of the cooling fins is greater than the thickness of the other cooling fins.
[0002]
[Prior art]
Conventionally, as this type of brake disk rotor, for example, JP-A-58-2221026 is known. As shown in FIG. 9, this is provided with annular sliding plates 1a and 1b sandwiched between a pair of brake pads (not shown) on the outer periphery, and radially inside the annular sliding plates 1a and 1b. Is a ventilated type disk rotor in which a large number of cooling fins 2 extending in the circumferential direction are arranged, and located on one diameter line so that the mass and rigidity distribution are not uniform in the circumferential direction. The thickness of the pair of cooling fins 2a, 2b is formed to be thicker than the thickness of the other cooling fins 2, thereby reducing the brake noise.
[0003]
[Problems to be solved by the invention]
However, in the conventional brake disc rotor, the shape of the cooling fins 2a and 2b is not particularly limited, and the thickness between the adjacent left and right fins is increased to increase the thickness. The entire surface area of the cooling fin is reduced, and the cooling performance, which is the original purpose of the cooling fin, may be impaired.
[0004]
Therefore, the present invention reduces brake squeal by forming a part of the thickness of the cooling fins arranged in the circumferential direction to be thick, and prevents the cooling performance from being impaired by the thick shape of the fins. The purpose is to do.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem , a brake disk rotor according to a first aspect of the present invention includes a pair of annular sliding plates that are clamped by opposing left and right brake pads, and a radial shape inside the annular sliding plates. And a plurality of cooling fins disposed along the circumferential direction of the cooling fin, wherein a part of the cooling fins is thicker than the other cooling fins. a rotor, thick cooling fins of the wall thickness, with has a thick portion on the rear side of the rotational direction during forward rotation of the disc rotor, the outer peripheral side surface of the thick portion, adjacent to the rear The other cooling fins are formed so as to be parallel to each other on the front surface in the rotational direction of the cooling fin and on the outer peripheral side of the cooling fin , and the inner peripheral surface of the thick portion is made closer to the inner peripheral end Slow between front and back in rotational direction The formed to be inclined to the front surface so as to spread.
According to a second aspect of the present invention, there is provided a brake disc rotor including a pair of annular sliding plates sandwiched between opposing left and right brake pads, and radially extending inside the annular sliding plates and in a circumferential direction. A brake disk rotor comprising a plurality of cooling fins disposed along the wall, wherein the thickness of some of the cooling fins is greater than the thickness of the other cooling fins. A thick cooling fin is used as a short fin, and the outer end of the short fin is located between the long fins, which are other cooling fins arranged along the circumferential direction. The short fin is arranged so as to coincide with the radial position of the outer peripheral end of the fin and the inner peripheral end of the short fin is positioned radially outward from the inner peripheral end of the long fin. The disc rotor is positive In some cases, a thick portion is provided on the rear surface side in the rotational direction, and the surface of the thick portion and the front surface in the rotational direction of the long fin adjacent to the rear are parallel to each other on the outer peripheral side of the long fin. It is characterized by being.
Furthermore, a brake disk rotor according to a third aspect of the present invention includes a pair of annular sliding plates sandwiched between left and right brake pads facing each other, a radial direction extending in the annular sliding plates, and a circumferential direction. A brake disk rotor comprising a plurality of cooling fins disposed along the wall, wherein the thickness of some of the cooling fins is greater than the thickness of the other cooling fins. The thick cooling fins have thick portions on the rear side and front side in the rotational direction during normal rotation of the disk rotor, and the outer peripheral surfaces of these thick portions are adjacent to the rear and front sides. The cooling fins are formed so as to be parallel to each other at least on the outer peripheral side.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a brake disk rotor according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 and FIG. 2 show the structure of a ventilated brake disk rotor 10, which includes a pair of annular sliding plates 11a and 11b arranged in parallel, and a radially extending circumference between them. A plurality of cooling fins 12 are arranged along the direction, and an attachment hole 13 for attaching the disk rotor 10 to a wheel hub (not shown) is provided in the inner periphery.
[0007]
FIG. 3 schematically shows the cooling air 15 flowing in the vicinity of the cooling fins 12. While traveling, the cooling air 15 flowing through the flow path 14 between the cooling fins 12 flows from the inner periphery to the outer periphery of the disk rotor 10. In general, each cooling fin 12 is in the rotational direction A of the disk rotor 10. A separation area 16 having a very low flow velocity or no flow velocity is formed on the rear surface side, and the cooling air 15 flows avoiding the separation area 16.
[0008]
FIG. 4 shows a first embodiment of the disk rotor according to the present invention, and with respect to the rotation direction A of the disk rotor 10 so that the mass and rigidity distribution are not uniform in the circumferential direction. A thick portion 17 is provided on the rear surface side of some cooling fins 12b, and the thickness is made larger than the other cooling fins 12a and 12c adjacent to the front and rear. The thick portion 17 is provided so as to substantially correspond to the above-described peeling region 16 formed on the rear surface side of the cooling fin, and is also formed so as to be substantially parallel to the front surface of the adjacent rear cooling fin 12c. It is served. In addition, the said thick part 17 is provided about several among all the cooling fins 12b.
[0009]
In the disk rotor configured as described above, the thick portion 17 is set in the separation region 16 of the cooling fin 12b, and the space between the front surface of the adjacent cooling fins 12c is set in parallel. Since the flow path 14 is not throttled in the middle, the flow of the cooling air 15 is not hindered, and the flow velocity of the cooling air 15 flowing through the flow path 14 is not reduced.
[0010]
Normally, in order to reduce the brake squeal, it is desirable to dispose thick fins at six locations on the circumference in order to control the rotor eigenvalue, for example, for the mode with a 6-node diameter of the rotor. . In the present embodiment, since the surface of the thick portion 17 and the front surface of the cooling fin 12c adjacent to the rear side thereof are set substantially in parallel, the fin mass for controlling the eigenvalue is distributed closer to the outer periphery, It acts effectively (increase in mass near the inner periphery is not effective because the change in eigenvalue is small and not effective with respect to the increase in rotor weight), and both brake squealing and cooling performance are satisfied.
[0011]
FIG. 5 shows a second embodiment of the present invention. As in the previous embodiment, a thick portion 17 is provided on the rear surface side of some cooling fins 12b, The cooling fins 12c are formed substantially in parallel. In particular, in this embodiment, the bending portion 18 is set in the thick portion 17 at a portion close to the inner peripheral side of the annular sliding plates 11a and 11b, and the thick portion 17 so that the inlet side 14a of the flow path 14 is enlarged. Is inclined to widen the gap between the adjacent cooling fins 12c on the rear side.
[0012]
Accordingly, also in this embodiment, as described above, the thick portion 17 is set in the separation region 16 of the cooling fin 12b with respect to the rotation direction A of the disk rotor 10, and the adjacent rear cooling fin 12c and Is maintained in parallel, the flow velocity of the cooling air 15 flowing through the flow path 14 is not reduced. Further, in this embodiment, the bending point 18 of the thick portion 17 is provided near the inner periphery of the disk rotor 10, and therefore the fin mass for controlling the eigenvalue is more concentratedly distributed in the outer peripheral portion than in the first embodiment. Thus, the increased mass acts more effectively on the eigenvalue control amount, and the opening area of the inlet side 14a of the flow path 14 through which the cooling air 15 is introduced can be set large, so that the cooling performance is improved.
[0013]
FIG. 6 shows a third embodiment of the present invention. In this embodiment, thick portions 17a and 17b are provided on two adjacent cooling fins 12b and 12c, respectively, and the front surfaces of the adjacent rear cooling fins 12c and 12d are kept parallel to each other. Is. In this embodiment, when the eigenvalue is insufficiently controlled in the thick portion 17 formed on one cooling fin 12b, it is possible to cope with the mass and the rigidity increase amount. In this embodiment, the case where the thick portions 17a and 17b are provided in the two adjacent cooling fins 12b and 12c has been described. However, the thick portion is provided in three or more continuous cooling fins as necessary. It is also possible.
[0014]
FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, when the cooling fins arranged on the circumference are alternately different in length, the thick portion 17 is formed on the rear surface side of the shorter cooling fin 12b, and the adjacent rear side The cooling fins 12c are set in parallel to each other. In this way, by forming the thick portion 17 in the shorter cooling fin 12b, the mass of the fin for controlling the eigenvalue can be concentrated and distributed in the outer peripheral portion, and the inlet of the flow path 14 for guiding the cooling air 15 can be obtained. Since the opening area of the side 14a can be increased, the cooling efficiency is improved, and the cooling performance distribution of the entire flow path 14, that is, the temperature distribution generated in the rotation direction can be made uniform. It is possible to suppress the occurrence of cracks and the like due to non-uniformity.
[0015]
FIG. 8 shows a fifth embodiment of the present invention. In this embodiment, thick portions 17a and 17b are provided on both sides of the cooling fin 12b, and the adjacent front and rear cooling fins 12a and 12c are kept in parallel. In this embodiment, the flow passage areas B1, B2, B3, and B4 between all the cooling fins are set equal (B1 = B2 = B3 = B4).
[0016]
Therefore, in this embodiment, the thick portion 17a (or 17b (depending on the rotation direction)) of the cooling fin 12b is set in addition to the above-described peeling region, but the flow passage areas B1, B2, B3, and B4 are set equal. As a result, the same effects as those of the fourth embodiment described above can be obtained, and the common disk rotor 10 can be used for the left and right wheels of the vehicle, thereby reducing the manufacturing cost.
[0017]
【The invention's effect】
As described above, according to the brake disk rotor according to the present invention, the cooling air separation area generated on the rear surface side of the cooling fin in the rotational direction is overlaid, and the thick portion is adjacent to the thick portion. Since the rear cooling fins are set so as to be parallel to each other, the flow velocity of the cooling air flowing through the flow path between the cooling fins is not greatly reduced. Therefore, it is possible to effectively perform circumferential mass control and reduce brake squealing without impairing the original cooling performance of the disk rotor.
[Brief description of the drawings]
FIG. 1 is an external view of a ventilated disc rotor.
FIG. 2 is a partial cross-sectional view of FIG. 1 showing cooling fins of the disk rotor.
FIG. 3 is a schematic view of cooling air flowing between cooling fins.
FIG. 4 is a conceptual diagram showing a first embodiment of the present invention.
FIG. 5 is a conceptual diagram showing a second embodiment of the present invention.
FIG. 6 is a conceptual diagram showing a third embodiment of the present invention.
FIG. 7 is a conceptual diagram showing a fourth embodiment of the present invention.
FIG. 8 is a conceptual diagram showing a fifth embodiment of the present invention.
FIG. 9 is a front view showing the structure of a conventional disk roller.
[Explanation of symbols]
10 Disc rotor 11a, 11b Annular sliding plate 12, 12a, 12b, 12c Cooling fin 17 Thick part A Rotation direction of disc rotor

Claims (3)

A pair of annular sliding plates sandwiched between left and right brake pads facing each other, and a plurality of cooling fins extending radially inside the annular sliding plates and disposed along the circumferential direction, In the brake disk rotor formed by forming the thickness of some of the cooling fins thicker than the thickness of the other cooling fins,
Thick cooling fins of the wall thickness, with has a thick portion on the rear side of the rotational direction during forward rotation of the disc rotor, the outer peripheral side surface of the thick portion, other cooling adjacent to the rear The front surface in the rotational direction of the fin and the outer peripheral side of the cooling fin are formed so as to be parallel to each other, and the inner peripheral surface of the thick portion is moved in the rotational direction of the other adjacent cooling fins toward the inner peripheral end. A brake disk rotor characterized by being inclined with respect to the front surface so that the space between the front surface and the front surface is gradually widened . A pair of annular sliding plates sandwiched between left and right brake pads facing each other, and a plurality of cooling fins extending radially inside the annular sliding plate and disposed along the circumferential direction, In the brake disk rotor formed by forming the thickness of some of the cooling fins thicker than the thickness of the other cooling fins,
The thick cooling fins are short fins, and the short fins are arranged between the long fins that are other cooling fins arranged in the circumferential direction, and the outer peripheral ends of the short fins are It is arranged so as to coincide with the radial position of the outer peripheral end of the long fin, and the inner peripheral end of the short fin is positioned radially outward from the inner peripheral end of the long fin, and The short fin has a thick portion on the rear surface side in the rotational direction during normal rotation of the disk rotor, and the surface of the thick portion and the front surface in the rotational direction of the long fin adjacent to the rear are the above. A brake disc rotor characterized by being parallel to each other on the outer peripheral side of a long fin. A pair of annular sliding plates sandwiched between left and right brake pads facing each other, and a plurality of cooling fins extending radially inside the annular sliding plate and disposed along the circumferential direction, In the brake disk rotor formed by forming the thickness of some of the cooling fins thicker than the thickness of the other cooling fins,
The thick cooling fin has thick portions on the rear side and front side in the rotational direction during normal rotation of the disk rotor, and the outer peripheral side surfaces of these thick portions on the rear and front sides. A brake disk rotor characterized by being formed to be parallel to each other at least on the outer peripheral side with other adjacent cooling fins.

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