JP2014119091A - Rotor installation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for installing a rotor on an inner periphery of a wheel on the outer peripheral side of the rotor so as to absorb elastic deformation of the wheel and thermal expansion of the rotor.SOLUTION: A rotor installation structure includes an intermediate ring 52 interposed between a wheel 20 and a rotor 40 through gaps from them and is configured so that in order to inhibit relative rotation of the intermediate ring 52 and the wheel 20 (a), a plurality of pairs of first locking parts 62 and first locked parts 60 which can be engaged with each other are respectively formed on an outer peripheral surface of the intermediate ring 52 and an inner peripheral surface of the wheel 20, and in order to inhibit relative rotation of the intermediate ring 52 and the rotor 40 (b), a plurality of pairs of second locking parts 66 and second locked parts 64 which can be engaged with each other are respectively formed on an inner peripheral surface of the intermediate ring 52 and an outer peripheral end of the rotor 40, and the plurality of pairs of the first locking parts 62 and the first locked parts 60 and the plurality of pairs of the second locking parts 66 and the second locked parts 64 are arranged in respectively shifted states in a peripheral direction.

Description

  The present invention relates to a vehicular brake device in which a rotor fixed to the inner periphery of a wheel on the outer peripheral side is provided in a state where a caliper straddles from the inner peripheral side, and more particularly to a structure for mounting the rotor to a wheel. .

  The vehicle brake device holds (A) a rotor that has friction surfaces on both sides and rotates together with the wheel, and (B) a pair of brake pads that are brought into sliding contact with the friction surfaces on both sides. There is a so-called disc brake that is provided in a straddling state and includes a caliper that presses the pair of friction pads against the corresponding friction surfaces. In the brake devices described in Patent Documents 1 and 2 below, the rotor is fixed to the wheel on the outer peripheral side thereof, and the caliper is provided on the rotor so as to straddle the inner peripheral side. In such a disc brake, since the rotor is disposed on the outer peripheral side of the space in the wheel, the effective braking radius can be increased and a large braking torque can be obtained. In addition, since heat generated during braking can be released from the rotor to the wheel, overheating of the rotor can be favorably avoided.

JP-A-10-292732 JP-A-2005-337355

  In the brake device described in Patent Document 1, the rotor is formed integrally with the wheel. Moreover, as for the brake device of patent document 2, the rotor is being fixed to the wheel with the volt | bolt. While the vehicle is running, elastic deformation occurs in the wheel, and thermal expansion occurs in the rotor. Therefore, in the brake device described in the above-mentioned patent document, a large stress generated in the connection portion between the wheel and the rotor becomes a problem. This invention is made | formed in view of such a situation, and makes it a subject to provide the attachment structure to the wheel of the rotor which can absorb the elastic deformation of a wheel and the thermal expansion of a rotor.

  In order to solve the above problems, the rotor mounting structure of the present invention is configured to include an intermediate ring interposed with a gap between the wheel and the rotor, and (a) relative to the intermediate ring and the wheel. In order to prohibit rotation, a plurality of pairs of first locking portions and first locked portions that can be engaged with each other are provided on the outer peripheral surface of the intermediate ring and the inner peripheral surface of the wheel, respectively, and (b) In order to prohibit relative rotation of the intermediate ring and the rotor, a plurality of pairs of second locking portions and second locked portions that can be engaged with each other are provided on the inner peripheral surface of the intermediate ring and the outer peripheral end of the rotor, respectively. The plurality of pairs of first locking portions and first locked portions, and the plurality of pairs of second locking portions and second locked portions are provided in a state shifted in the circumferential direction. It is characterized by.

  In the rotor mounting structure according to the present invention, a gap is provided between the wheel and the portion where the intermediate ring and the rotor are engaged, and a gap is provided between the portion where the intermediate ring and the wheel are engaged and the disk rotor. ing. Therefore, according to the rotor mounting structure of the present invention, the elastic deformation of the wheel and the thermal expansion of the rotor are absorbed by the elastic deformation of the intermediate ring.

Aspects of the Invention

  In the following, some aspects of the invention that can be claimed in the present application (hereinafter sometimes referred to as “claimable invention”) will be exemplified and described. As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is merely for the purpose of facilitating the understanding of the claimable inventions, and is not intended to limit the combinations of the constituent elements constituting those inventions to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description accompanying each section, the description of the embodiments, etc., and as long as the interpretation is followed, another aspect is added to the form of each section. In addition, an aspect in which some constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention. The following item (1) corresponds to claim 1.

(1) (A) An annular rotor that is attached to the inner periphery of the wheel on its outer peripheral side and rotates with the wheel, and (B) a pair of brake pads are held on the inner peripheral side of the rotor. A brake device for a vehicle provided with a caliper sandwiched between the pair of brake pads, the mounting structure for attaching the rotor to the wheel,
There is a gap between the outer peripheral surface of the wheel and the inner peripheral surface of the wheel and between the inner peripheral surface of the wheel and the outer peripheral end of the rotor. Comprising an intermediate ring made of
In order to prohibit relative rotation between the intermediate ring and the rotor, a first locking portion and a first locked portion that can be engaged with each other are provided on an inner peripheral surface of the intermediate ring and an outer peripheral end of the rotor, respectively. A plurality of pairs,
In order to prohibit relative rotation between the intermediate ring and the wheel, a second locking portion and a second locked portion that can be engaged with each other are provided on the outer peripheral surface of the intermediate ring and the inner peripheral surface of the wheel, respectively. Are provided in pairs,
The rotor mounting structure in which the plurality of pairs of first locking portions and first locked portions and the plurality of pairs of second locking portions and second locked portions are provided at positions shifted in the circumferential direction. .

  According to the rotor mounting structure described in this section, the first locking portion and the first locked portion are engaged between the intermediate ring and the rotor (hereinafter referred to as the first locking portion). There are a plurality of locations), and a gap (hereinafter sometimes referred to as a first gap) is formed between each of the plurality of first engagement portions. Yes. In addition, there are a plurality of portions (hereinafter sometimes referred to as second engaging portions) where the second locking portion and the second locked portion engage with each other between the intermediate ring and the wheel. In addition, a gap is formed between each of the plurality of second engaging portions (hereinafter sometimes referred to as a second gap portion). In the rotor mounting structure described in this section, the first engaging portion is located in the middle in the circumferential direction of the second gap portion, and the second engaging portion is located in the middle in the circumferential direction of the first gap portion. positioned. Therefore, for example, even when the radial distance between the rotor and the wheel changes due to elastic deformation of the wheel or thermal expansion of the rotor, the approach between the first engagement portion and the wheel is the second gap portion. And the approach between the second engaging portion and the rotor is allowed by the first gap portion. In short, the rotor mounting structure described in this section can absorb elastic deformation of the wheel and thermal expansion of the rotor by elastic deformation of the intermediate ring.

  In the rotor mounting structure described in this section, at least one of the first locking portion and the first locked portion is formed in a shape protruding in the radial direction, whereby each of the plurality of first engaging portions A gap in the radial direction is formed between the intermediate ring and the rotor. Similarly, at least one of the second locking portion and the second locked portion has a shape that is convex in the radial direction, thereby, between each of the plurality of second engaging portions, A radial gap is formed between the intermediate ring and the wheel. The engaging means between the first locking part and the first locked part and the engaging means between the second locking part and the second locked part are not particularly limited, Various means such as hooking and fastening can be employed. The first locking portion, the first locked portion, the second locking portion, and the second locked portion may be any number of pairs, but are preferably 6 pairs or more and 12 pairs or less.

(2) The rotor mounting structure is
An adapter ring, which is a component of the wheel, has an annular shape and has one of the second locking portion and the second locked portion formed on the inner peripheral surface thereof, and is fitted into the inner periphery of the wheel body The rotor mounting structure as set forth in (1), comprising:

  The aspect described in this section is an aspect in which the second locking part or the second locked part provided on the wheel is formed in an adapter ring which is a separate member. According to the aspect described in this section, it is possible to attach a rotor to the inner periphery of such a conventional wheel by attaching an adapter ring to the existing wheel. From the viewpoint of disposing the rotor as far as possible outside the wheel in order to increase the effective braking radius, it is desirable that the rotor be mounted so that there is no gap between the inner peripheral surface of the wheel and the outer peripheral surface of the adapter ring. .

It is a perspective view which shows the brake device for vehicles using the rotor attachment structure which is an Example of claimable invention. It is a perspective view which decomposes | disassembles and shows the rotor attachment structure which is an Example of claimable invention. It is a side view which decomposes | disassembles and shows the rotor attachment structure which is an Example of claimable invention. It is sectional drawing of the part which the intermediate | middle ring and rotor engage in the rotor attachment structure which is an Example of claimable invention. It is sectional drawing of the part which the intermediate | middle ring and adapter ring engage in the rotor attachment structure which is an Example of claimable invention. It is a perspective view which decomposes | disassembles and shows the rotor attachment structure of a modification. It is a figure which expands and shows the part which the intermediate | middle ring and rotor engage in the rotor attachment structure of a modification. It is a figure which shows the rotor attachment structure of a modification in the viewpoint from the outer side of a wheel.

  Hereinafter, as an embodiment for implementing the claimable invention, an embodiment of the claimable invention will be described in detail with reference to the drawings. The claimable invention is not limited to the following embodiments, and can be implemented in various modes with various changes and improvements based on the knowledge of those skilled in the art.

  FIG. 1 shows a vehicle brake device 10 in which a rotor mounting structure according to an embodiment of the claimable invention is used. The vehicle brake device 10 is disposed inside a wheel 20 constituting a wheel. The wheels are non-driving wheels and are rotatably held by a steering knuckle 22 fixed to the vehicle body. Specifically, the steering knuckle 22 rotatably holds an axle (not shown), and a wheel 20 is fastened to a hub 24 provided at the tip of the axle by a plurality of hub bolts and nuts 26. The wheel 20 includes a cylindrical rim portion 30 to which a tire is attached and a disc-shaped disc portion 32 that is continuous with one end of the rim portion 30, and is fastened to the hub 24 at the center of the disc portion 32. Has been.

  The vehicle brake device 10 includes a rotor 40 that is attached to the wheel 20 and rotates together with the wheel 20, and a caliper 42 that is fixed to the steering knuckle 22 and presses a pair of brake pads against the rotor 40. . That is, the brake device 10 is a so-called disc brake. However, the brake device 10 has an annular rotor 40 and is attached to the inner peripheral surface of the rim portion 30 of the wheel 20 at the outer peripheral end, and the caliper 42 straddles the rotor 40 from the inner peripheral side thereof. The rotor 40 is sandwiched between a pair of brake pads. The claimable invention relates to a structure for attaching the rotor 40 to the wheel 20, and the attachment structure will be described in detail below.

  FIG. 2 is an exploded perspective view showing the rotor mounting structure, and FIG. 3 is a side view showing the rotor mounting structure in an exploded manner. The rotor mounting structure includes two ring members 50 and 52 formed in an annular shape by a thin plate having a small width. The ring member 50, which is one of them, is a component of the wheel 20 and is a member that is fitted into the inner periphery of the rim portion 30 and attaches the rotor 40 to the wheel 20. In the following description, the ring member 50 may be referred to as an adapter ring 50. The other ring member 52 is a main member that connects the wheel 20 and the rotor 40 so as not to rotate relative to each other, and is a member interposed between the wheel 20 and the rotor 40. Hereinafter, the ring member 52 may be referred to as an intermediate ring 52.

  Eight convex portions 60 are provided at equal intervals on the outer peripheral end of the rotor 40. The intermediate ring 52 disposed on the outer peripheral side of the rotor 40 is provided with eight mounting seats 62 corresponding to the eight convex portions 60 provided on the rotor 40 on the inner peripheral surface thereof. . As shown in the cross-sectional view of FIG. 4, the eight protrusions 60 of the rotor 40 are fitted into the eight attachment seats 62, respectively, so that the intermediate ring 52 is attached to the rotor 40.

  Each of the eight mounting seats 62 has a generally U-shaped cross section in a plane orthogonal to the radial direction, and has convex portions 60 on one side in the axial direction of the wheel and on both sides in the circumferential direction. The movement with respect to the mounting seat 62 is prohibited. In other words, the relative rotation between the rotor 40 and the intermediate ring 52 is prohibited by the projection 60 being locked to the mounting seat 62. Accordingly, each of the eight mounting seats 62 of the intermediate ring 52 functions as a first locking portion, and each of the eight convex portions 60 of the rotor 40 functions as a first locked portion. Yes.

  Further, the intermediate ring 52 is provided with eight convex portions 64 on the outer peripheral surface thereof at positions displaced from the eight mounting seats 62 in the circumferential direction. Specifically, as shown in FIG. 3, eight convex portions 64 are respectively provided at the centers of the eight mounting seats 62. On the other hand, the adapter ring 50 attached to the wheel 20 is provided with eight attachment seats 66 corresponding to the eight convex portions 64 of the intermediate ring 52 on the inner peripheral surface thereof. As shown in the cross-sectional view of FIG. 5, the eight convex portions 64 of the intermediate ring 52 are fitted into the eight mounting seats 66 of the adapter ring 50, so that the intermediate ring 52 is attached to the rotor 40. Yes.

  Each of the eight mounting seats 66 has a pair of protrusions 68, and the protrusions 64 are fitted between the pair of protrusions 68, whereby the protrusions 64 on both sides in the circumferential direction are provided. The movement with respect to the mounting seat 66 is prohibited. In other words, the relative rotation between the intermediate ring 52 and the wheel 20 is prohibited by the convex portion 64 being locked to the mounting seat 66. Therefore, each of the eight mounting seats 66 of the adapter ring 50 functions as a second locking portion, and each of the eight convex portions 64 of the intermediate ring 52 functions as a second locked portion. ing.

  The rotor mounting structure also includes a fixing ring 80 that is another ring member in order to securely fix the rotor 40 and the intermediate ring 52. The fixing ring 80 is interposed between the rotor 40 and the intermediate ring 52, and has a diameter larger than the outer diameter of the rotor 40 and smaller than the inner diameter of the intermediate ring 52. As shown in FIG. 2, the fixing ring 80 has eight notches 82 corresponding to the eight convex portions 60 of the rotor 40. The fixing ring 80 has eight claw portions 84 at the center of each of the eight notches 82. Each of the eight claw portions 84 includes a pair of outer claws 86 projecting radially outward and an inner claw 88 projecting radially inward.

  As described above, the fixing ring 80 is inserted between the rotor 40 and the intermediate ring 52 and, as shown in FIGS. A pair of outer claws 86 are hooked on the end of the intermediate ring 52 while pressing each of the eight convex portions 60 of the rotor 40. Accordingly, the fixing ring 80 prevents the rotor 40 and the intermediate ring 52 from being displaced in the wheel axis direction, and the rotor 40 and the intermediate ring 52 are securely fixed.

  Next, an example of a method for attaching the rotor 40 to the wheel 20 will be described. First, the rotor 40 and the intermediate ring 52 are assembled. Specifically, each of the eight convex portions 60 of the rotor 40 is fitted into each of the eight mounting seats 62 of the corresponding intermediate ring 52. Subsequently, the fixing ring 80 is inserted between the rotor 40 and the intermediate ring 52. Specifically, as described above, the outer claw 86 is hooked on the intermediate ring 52 while pressing the projections 60 of the corresponding rotor 40 at the portions where the eight notches 82 of the fixing ring 80 are formed. It is done. Thereby, the rotor 40 and the intermediate ring 52 are securely fixed. The inner claw 88 of the fixing ring 80 is hooked on the outer peripheral end of the rotor 40, and functions as a retaining when inserted between the rotor 40 and the intermediate ring 52. It becomes possible to easily insert between the rotor 40 and the intermediate ring 52.

  Subsequently, the rotor 40 fitted with the intermediate ring 52 is fitted into the adapter ring 50 by shrink fitting or press fitting. Subsequently, the rotor 40 assembled with the intermediate ring 52 and the adapter ring 50 is fitted into the wheel 20 by shrink fitting or press fitting.

  In the rotor mounting structure of the present embodiment, a portion where the convex portion 60 and the mounting seat 62 engage with each other (hereinafter sometimes referred to as a first engaging portion) is provided between the intermediate ring 52 and the rotor 40. There are eight places, and gaps (hereinafter sometimes referred to as first gap parts) are formed between the eight first engaging parts. Further, a portion where the convex portion 64 and the mounting seat 66 are engaged between the intermediate ring 52 and the wheel 20, specifically between the intermediate ring 52 and the adapter ring 50 (hereinafter sometimes referred to as a second engaging portion). 8) exist, and a gap (hereinafter sometimes referred to as a second gap portion) is formed between each of the eight second engaging portions. In the rotor mounting structure, the first engagement portion is located at the center in the circumferential direction of the second gap portion, and the second engagement portion is located at the center in the circumferential direction of the first gap portion. . That is, for example, even when the radial distance between the rotor 40 and the wheel 20 changes due to elastic deformation of the wheel 20 or thermal expansion of the rotor 40, the first engagement portion and the wheel 20 approach each other. Is allowed by the second gap portion, and the approach between the second engagement portion and the rotor 20 is allowed by the first gap portion. Therefore, the brake device 10 using this rotor mounting structure is highly durable.

  In the rotor mounting structure of the above embodiment, the wheel 20 has the adapter ring 50 and the adapter ring 50 is provided with the mounting seat 66 as the second locking portion. The locking portion may be provided directly on the inner peripheral surface of the rim portion 30 of the wheel 20. Further, in the rotor mounting structure of the above embodiment, the wheel 20 is provided with the second locking portion, and the intermediate ring 52 is provided with the second locked portion. May be provided, and the second locking portion may be provided on the intermediate ring 52. Further, like the second locking portion and the second locked portion, either the first locking portion or the first locked portion may be provided on either the intermediate ring 52 or the rotor 40. .

  In the rotor mounting structure of the above-described embodiment, eight engaging portions between the intermediate ring 52 and the rotor 40 and eight engaging portions between the intermediate ring 52 and the wheel 20 are provided, but the number is limited. Not. However, the number is preferably 6 or more and 12 or less.

  In the rotor mounting structure of the above embodiment, the fixing ring 80 is used to fix the intermediate ring 52 and the rotor 40. However, the structure shown in FIGS. 6 and 7 may be used. . The modified rotor mounting structure is a structure in which the rotor 100 and the intermediate ring 102 are fastened using bolts 104. The rotor 100 and the intermediate ring 102 are provided with eight protrusions 110 on the outer peripheral end of the rotor 100 and eight mounting seats 112 on the inner peripheral surface of the intermediate ring 102, as in the above embodiment. ing. However, each of the eight mounting seats 112 is provided with a through hole 114 penetrating in the wheel axis direction, and each of the eight convex portions 110 has a shape in which the tip is divided into two. Then, as shown in FIG. 7, in a state where the rotor 100 and the intermediate ring 102 are assembled, the bolt 104 is inserted between the through hole 114 of the mounting seat 112 and the bifurcated portion of the convex portion 110. Be made.

  Further, the rotor mounting structure of the present modification includes a fixing ring 120 having a shape different from that of the fixing ring 80 of the above-described embodiment. Bolts 104 are screwed onto the fixing ring 120 so as to correspond to the eight engaging portions of the rotor 100 and the intermediate ring 102, that is, the positions where the eight convex portions 110 and the eight mounting seats 112 are engaged. Eight internal threaded portions 122 are provided. The female screw portion 122 has a screw hole 124 in which a screw groove is formed, and a bolt 104 inserted through the convex portion 110 of the rotor 100 and the mounting seat 112 of the intermediate ring 102 is screwed into the screw hole 124. The convex portion 110 of the rotor 100 and the mounting seat 112 of the intermediate ring 102 are sandwiched between the rotor 104 and the rotor 104. With such a structure, the rotor 100 and the intermediate ring 102 are securely fixed. Note that the rotor 100 assembled with the intermediate ring 102 is fitted into the wheel 130 using the adapter ring 50 in the same manner as the rotor mounting structure of the above embodiment.

  In the rotor mounting structure of this modification, the eight bolts 104 can be removed from the outside of the wheel 130 by providing the wheel 130 with a disk portion having a design as shown in FIG. That is, the fastening between the rotor 100 and the intermediate ring 102 can be released, and the wheel can be removed with the rotor 100 left on the vehicle body side.

  DESCRIPTION OF SYMBOLS 10: Brake device for vehicles 20: Wheel 30: Rim part 32: Disc part 40: Rotor 42: Caliper 50: Adapter ring 52: Intermediate ring 60: Eight convex part [1st to-be-latched part] 62: Eight attachment Seat [first locking portion] 64: Eight convex portions [second locked portion] 66: Eight mounting seats [second locking portion] 80: Fixing ring 82: Eight notches 84: Eight claws Part 100: Rotor 102: Intermediate ring 104: Bolt 110: Eight convex parts 112: Eight mounting seats 114: Through hole 120: Fixing ring 122: Female thread part 124: Screw hole 130: Wheel

Claims (1)

(A) An annular rotor that is attached to the inner periphery of the wheel on its outer peripheral side and rotates with the wheel, and (B) a pair of brake pads is held, straddling the rotor from its inner peripheral side. And a caliper that sandwiches the rotor by the pair of brake pads, the mounting structure for attaching the rotor to the wheel,
There is a gap between the outer peripheral surface of the wheel and the inner peripheral surface of the wheel and between the inner peripheral surface of the wheel and the outer peripheral end of the rotor. Comprising an intermediate ring made of
In order to prohibit relative rotation between the intermediate ring and the rotor, a first locking portion and a first locked portion that can be engaged with each other are provided on an inner peripheral surface of the intermediate ring and an outer peripheral end of the rotor, respectively. A plurality of pairs,
In order to prohibit relative rotation between the intermediate ring and the wheel, a second locking portion and a second locked portion that can be engaged with each other are provided on the outer peripheral surface of the intermediate ring and the inner peripheral surface of the wheel, respectively. Are provided in pairs,
The rotor mounting structure in which the plurality of pairs of first locking portions and first locked portions and the plurality of pairs of second locking portions and second locked portions are provided at positions shifted in the circumferential direction. .

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