JP2008291877A - Disc brake device for rolling stock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and accurately align a pair of brake disks with flange section when fastening them without increasing a weight of the brake disk in which heat dissipation rib is arranged. <P>SOLUTION: A pair of brake disks 4 is easily and accurately aligned with a flange section 3 when fastening without increasing a weight of the brake disk 4 in such a way that a penetrating pin hole 3b is formed in the flange section 3 of a hub 2 to keep an engagement pin 9 projected to front/rear both sides of the flange section 3 and fitted loose through the pin hole 3b with a groove 9a engaging with a heat dissipation rib 8c radially extending to the pair of brake disks 4 arranged in both end faces of the engagement pin 9 projected to the front/rear both sides of this flange section 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a railway vehicle disc brake device.

  Railway vehicle disc brake devices include a wheel-mounted type in which a pair of brake discs are mounted on both sides of a wheel flange portion, and an axle-mounted type in which a pair of brake discs are mounted on both sides of a hub flange portion provided on an axle. In many of these brake discs, a plurality of radiating ribs that radiate frictional heat with the brake pad are radially extended on the side surface opposite to the side on which the brake pad is pressed (for example, , See Patent Document 1). The disc brake device for railway vehicles described in Patent Document 1 is of a wheel mounting type.

  After the pair of brake discs are aligned with the flange portion, the pair of brake discs are fastened to both front and back sides of the flange portion with a common fastening member. Generally, a fastening bolt is communicated with a fastening hole provided in the flange portion and each brake disk, and a nut is fastened to the tip of the communicated fastening bolt and fastened with a common fastening bolt and nut. Thus, the disc brake device that fastens the flange portion and the pair of brake discs with a common fastening member takes time and effort to accurately align the three members of the flange portion and the pair of brake discs during fastening. There is a problem of long time. For example, when using a fastening bolt for a fastening member, in order to connect a fastening bolt to the fastening hole of three members, it is necessary to align these fastening holes with high precision. In order to facilitate the connection of the fastening bolt, each fastening hole may be enlarged. However, if the fastening hole is enlarged, the alignment accuracy when the pair of brake disks are fastened to the flange portion is deteriorated.

  It should be noted that the three members of the pair of brake discs and the flange portion provided with the heat radiating ribs are not fastened, but the two members are attached so that one brake disc is attached to one side of the flange portion of the hub provided on the axle. For the disc brake device that is fastened and presses the brake pads on both sides of the brake disc, a square projection is projected from the flange, and the radius provided on the inner periphery of the brake disc There is one in which an engagement groove extending in a direction is engaged so that the brake disk is accurately aligned with the flange portion (see, for example, Patent Document 2). In what is described in Patent Document 2, the square protrusion of the flange portion is provided on a centering member loosely fitted in a circular recess provided on the side surface of the flange portion. In addition, a protrusion may be provided on the brake disc side, and an engagement groove that engages with the protrusion may be provided on the flange portion side.

JP 2000-170805 A JP 2003-130102 A

  In the railway vehicle disc brake device that fastens the pair of brake discs provided with the heat dissipating ribs with the common fastening members on both the front and back sides of the flange portion, in order to accurately align the pair of brake discs with the flange portion at the time of fastening. As described in Patent Document 2, it is conceivable to provide a protrusion on one of the flange portion and the brake disc and to provide an engaging groove to engage with the other on the other. When the three members are fastened with a common fastening member, it is necessary to precisely match the positions of the protrusions or engagement grooves provided on both the front and back sides of the flange portion, and there is a problem that these processes are difficult.

  Further, when the engagement groove is provided on the brake disk side, it is necessary to form the engagement groove on the side surface provided with the heat radiation rib, and the periphery of the engagement groove must be thick. For this reason, there is a problem that the weight of the brake disk increases and the manufacturing cost increases. Even when the protrusion is provided on the brake disk side, it is necessary to form the protrusion thickly, which increases the weight of the brake disk and increases the manufacturing cost.

  Accordingly, an object of the present invention is to make it possible to easily and accurately align a pair of brake discs with a flange portion at the time of fastening without increasing the weight of the brake discs provided with heat radiation ribs.

  In order to solve the above-described problems, the present invention provides a common fastening member for a pair of brake discs on which brake pads are pressed on both front and back sides of a flange portion of a wheel of a railway vehicle or a flange portion of a hub provided on an axle. In the disk brake device for a railway vehicle, in which a plurality of heat radiating ribs are formed to extend radially on a side surface opposite to the side on which the brake pad is pressed of the pair of brake disks, the flange portion penetrates the flange portion. A pin hole is formed, and the engagement pin protrudes into the front and back sides of the flange portion and is loosely fitted. The pair of brakes are formed on both end surfaces of the engagement pin that protrude on the front and back sides of the flange portion. A configuration in which grooves that engage with the heat-dissipating ribs of the disk are provided.

  That is, a pin hole penetrating the flange portion is formed, and the engaging pin protrudes from both the front and back sides into the pin hole of the flange portion, and both end surfaces of the engaging pin protrude from the front and back sides of the flange portion. In addition, by providing grooves that engage with the heat dissipation ribs of the pair of brake discs, the pair of brake discs can be easily and accurately aligned with the flange portion during fastening without increasing the weight of the brake discs with the heat dissipation ribs. I was able to do it.

  The disc brake device for a railway vehicle according to the present invention forms a pin hole penetrating the flange portion, and loosely fits the engagement pin into both the front and back sides of the flange portion by projecting the engagement pin into the front and back sides of the flange portion. Since the grooves engaging with the heat dissipating ribs of the pair of brake discs are provided on both end faces of the engaging pins protruding in the direction, the pair of brake discs can be attached at the time of fastening without increasing the weight of the brake discs provided with the heat dissipating ribs. It can be easily and accurately aligned with the flange.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This railway vehicle disc brake device is of an axle mounting type. As shown in FIGS. 1 and 2, a pair of brake discs 4 are provided on both front and back sides of the flange portion 3 of the hub 2 that is externally fixed to the axle 1. Are fastened by a common fastening bolt 5 and nut 6 communicated with each of the fastening holes 3 a and 4 a provided in the flange portion 3 and each brake disk 4. The brake pads 7 are pressed against the outer side surfaces of the pair of brake disks 4, and a plurality of heat radiating ribs 8 a, 8 b, 8 c that radiate frictional heat with the brake pads 7 extend radially on the inner side surface on the opposite side. Is formed.

  As shown in FIGS. 2 and 3 (a), 3 (b), and 3 (c), the fastening hole 4a of the brake disc 4 is provided in each heat dissipating rib 8a having a middle thickness, and each heat dissipating rib on both sides thereof. In 8b, a portion close to the middle thick portion of the heat radiating rib 8a is cut off. Further, each heat radiating rib 8c sandwiched between the cut heat radiating ribs 8b extends at a uniform width in the radial direction.

  As shown in FIGS. 2 and 4 (a), the flange portion 3 of the hub 2 is formed with pin holes 3b through which the heat radiating ribs 8c penetrate in the circumferential direction extending in the radial direction. The engagement pin 9 is loosely fitted to 3b so as to protrude on both the front and back sides of the flange portion 3.

  As shown in FIG. 4 (b), both end surfaces of the engaging pins 9 projecting on both the front and back sides of the flange portion 3 are engaged with heat radiating ribs 8 c extending at equal widths in the radial direction of the brake disks 4. A groove 9a is provided. Therefore, by engaging the heat dissipating ribs 8c of each brake disk 4 with the grooves 9a on both end faces of the engaging pin 9 loosely fitted on the flange part 3, a pair of fasteners fastened to the front and back sides of the flange part 3 The brake disc 4 can be easily and accurately aligned, and as shown in FIG. 1, a common fastening bolt 5 is provided in the aligned flange portion 3 and the fastening holes 3a and 4a of the pair of brake discs 4. Can be easily communicated.

  In the above-described embodiment, a pair of brake discs are of an axle mounting type in which a pair of brake discs are attached to both sides of the flange portion of the hub. It can also be applied to a wheel mounting type that is attached to both sides.

Partially omitted longitudinal sectional view showing an embodiment of a disk brake device for a railway vehicle Sectional view along the line II-II in FIG. a, b, and c are sectional views taken along lines IIIa-IIIa, IIIb-IIIb, and IIIc-IIIc in FIG. 2, respectively. a is a sectional view taken along line IVa-IVa in FIG. 2, and b is a perspective view showing an engaging pin of a.

1 Axle 2 Hub 3 Flange part 3a Fastening hole 3b Pin hole 4 Brake disc 4a Fastening hole 5 Fastening bolt 6 Nut 7 Brake pads 8a, 8b, 8c Heat radiation rib 9 Engaging pin 9a Groove

Claims (1)

  A pair of brake disks to be pressed against the brake pads are fastened with a common fastening member on both the front and back sides of the flanges of the wheels of the railway vehicle or the hub flanges provided on the axles, and the brake pads of the pair of brake disks In a railway vehicle disc brake device in which a plurality of heat dissipating ribs are formed so as to extend radially on a side surface opposite to a side to be pressed, a pin hole penetrating the flange portion is formed, and a pin of the flange portion is formed Engagement pins are protruded on both sides of the front and back sides of the holes, and grooves that engage with the heat dissipating ribs of the pair of brake disks are provided on both end surfaces of the engagement pins protruding on both front and back sides of the flange portion. A disc brake device for railway vehicles.

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