JP4691544B2 - Brake rotating body of brake device - Google Patents

Description

  The present invention relates to a braking rotator of a brake device such as a brake disk and a brake drum.

  In the disc brake and the drum brake, a flat fastening wall of a brake disc or a brake drum which is a brake rotating body is bolted to a hub and a wheel on the axle side. Since this fastening wall affects the vibration of the braking surface of the braking rotator, a high machining accuracy is required for the mounting surface on the axle side or wheel side. For this reason, various techniques have been devised in order to increase the processing accuracy with respect to the mounting surface of the fastening wall (see, for example, Patent Document 1).

By the way, in such a manufacturing process of the braking rotator, cutting of each part of the braking rotator is performed, and information symbols such as a manufacturing lot number and a caution symbol are attached to a fastening wall or the like by engraving or dot printing. . Further, as a method of attaching an information symbol to the brake rotator, for example, casting, printing, application description with paint, and the like are performed in addition to marking and dot printing.
JP 2002-317834 A

However, when using dot printing, printing, or coating description with paint when attaching an information symbol to the brake rotator, the surface will inevitably have irregularities on the surface, and when engraving or casting is used. Since the surface inevitably has irregularities, it is difficult to attach to the flat fastening wall. In addition, when using dot printing, printing, or coating description by paint, the information notation may be peeled off due to use over time.
In other words, if unevenness occurs on the surface of the fastening wall by means of attaching these information symbols, the contact with the hub or wheel on the axle side tends to be uneven, and local distortion is also caused on the fastening wall by stamping or casting. When this occurs, the component strength of the braking rotator tends to be unbalanced in the circumferential direction.

  In addition, it is conceivable to attach an information symbol to a cylindrical surface other than the fastening wall by stamping or casting, but in this case, it becomes difficult to attach the information symbol itself, and the strength of the parts is also reduced in the circumferential direction. It tends to be unbalanced.

  Accordingly, the present invention provides a braking rotator for a brake device capable of attaching an information symbol to a flat fastening wall without causing uneven contact with the fastening wall or imbalance of the component strength in the circumferential direction. Is to provide.

The invention according to claim 1, which solves the above problem, is a braking rotator of a braking device that rotates integrally with a wheel and generates a braking force when a friction material is pressed against the wheel. Of the flat plate-shaped fastening wall (for example, the fastening wall 7 in the embodiment) that is fastened to the wheel, on the axle-side mounting surface (for example, the hub-side mounting surface 13 in the embodiment) with a circle centered on the rotation center (For example, grooves 14A and 14B in the embodiment), and an information symbol (for example, information symbol 15 in the embodiment) is attached to the inside of the circular groove.
Thereby, distortion at the time of attaching the information symbol occurs only in the circular groove, and the other area of the fastening wall is not affected by the distortion.
Further, in a state where the braking rotator is attached to the vehicle, the circular groove and the information symbol are positioned on the back side of the fastening wall with respect to the wheel.

  According to the first aspect of the present invention, the distortion at the time of attaching the information symbol occurs only in the circular groove centering on the rotation center on the fastening wall. The information symbol can be reliably attached to the flat fastening wall without causing unevenness of hitting and imbalance of the component strength in the circumferential direction.

Furthermore, according to the invention described in claim 1 , since the circular groove and the information symbol are arranged on the back side of the fastening wall with respect to the wheel, the information symbol of water or mud adhering to the circular groove is attached. Aged deterioration of display is less likely to occur. Therefore, management of manufacturing history and the like is ensured.

Embodiments of the present invention will be described below with reference to the drawings.
First, the first embodiment shown in FIGS. 1 to 4 will be described.
In this embodiment, the braking rotator according to the present invention is applied to a disc-type brake device, and FIG. 1 shows an assembled state of a brake disc 1 which is a braking rotator. In the figure, 2 is a hub supported on the axle side, and 3 is a wheel on the wheel side.

  The hub 2 is integrally formed with a wheel fastening flange portion 2b at an end portion of a shaft portion 2a supported by the axle. The wheel 3 includes a rim portion 3a to which a tire (not shown) is attached on the outer peripheral surface, and a disc portion 3b fastened to the hub 2 by bolts 4 and nuts 5. It is integrally formed at the end. A plurality of bolt insertion holes 6 are formed in the inner peripheral edge of the disk portion 3b, and the bolts 4 protruding from the hub 2 are inserted into the bolt insertion holes 6.

  2 to 4 show a single structure of the brake disc 1. As shown in these drawings, the brake disc 1 is provided with a flat disc-shaped fastening wall 7 at the inner peripheral edge, and a cylindrical shape bent toward the hub 2 at the outer peripheral edge of the fastening wall 7. A bent wall 8 is extended, and an annular braking wall 9 is provided at the end of the bent wall 8. The fastening wall 7 is provided with a circular opening 10 at the center, and a plurality of bolt insertion holes 11 are formed at the outer peripheral edge of the opening 10. One surface of the fastening wall 7 is a wheel-side mounting surface 12 that is superposed on the disk portion 3b of the wheel 3, and the other surface is a hub-side mounting surface 13 that is superposed on the flange portion 2b of the hub 2. The bolt 4 projecting on the hub 2 side is inserted into the bolt insertion hole 11. The brake disk 1 is bolted to both the hub 2 and the disk 3 so as to be sandwiched between the flange 2b of the hub 2 and the disk 3b of the wheel 3.

In addition, shallow circular grooves 14A and 14B centering on the rotation center P are formed on the attachment surfaces 12 and 13 on the front and back sides of the fastening wall 7. Each of the grooves 14A and 14B is formed in a radially inner region from the position where the bolt insertion hole 11 is formed in the peripheral portion of the opening 10, and the circular groove 14B of the hub side mounting surface 13 is formed on the wheel side mounting. The surface 12 is formed to have a slightly larger diameter than the circular groove 14A. The grooves 14A and 14B may be formed in the radially outer region from the position where the bolt fastening holes 11 are formed. However, the closer to the rotation center P, the more stable the grooves 14A and 14B are formed. (It is difficult to distort), so it is more preferable to form it in the radially inner region. Further, since the grooves 14A and 14B are formed by pressing a cutting blade having a flat tip when the brake disc 1 is rotated, the respective steps of the brake disc 1 are performed in the same process. Processing can be performed, and there is no significant increase in processing man-hours.
As shown in FIG. 3, an information symbol 15 such as a production lot number is marked on the flat bottom surfaces 14a and 14b (see FIGS. 3 and 4) of the grooves 14A and 14B. In addition, although the information symbol 15 may be attached by dot print, paint, or the like, the stamp is more preferable from the viewpoint of deterioration over time.

  As described above, since the information symbol 15 is attached to the flat fastening wall 7 of the brake disc 1, information such as a manufacturing lot number is fastened when the disc brake 1 is newly installed or replaced. It can be visually confirmed on the wall 7. Accordingly, the manufacturing history and the like can be managed based on the attached information symbol 15.

  In the case of the brake disc 1, the information symbol 15 is engraved on the bottom surfaces 14a and 14a of the circular grooves 14A and 14B formed on the mounting surfaces 12 and 13 on the front and back surfaces of the fastening wall 7. The influence of distortion generated when marking is limited to the inner range of each groove 14A, 14B. Specifically, the bulge generated at the edge of the recessed portion of the marking is suppressed to the range of the depth of each groove 14A, 14B, and deformation due to distortion centered on the marking does not reach the outer region of each groove 14A, 14B. Therefore, the contact surfaces of the mounting surfaces 12 and 13 that contact the disc portion 3b of the wheel 3 and the flange portion 2b of the hub 2 do not become uneven, and the brake disc 1 has the wheel 3 and the hub 2 with high mounting accuracy. Attached to.

  In the case of this brake disc 1, the information symbol 15 is usually stamped on a part of the fastening wall 7 in the circumferential direction, but the grooves 14A and 14B marked with the information symbol 15 rotate. Due to the circular shape centering on the center P, the strength of the fastening wall 7 does not become unbalanced in the circumferential direction due to the marking of the information symbol 15.

In this embodiment, the circular grooves 14A and 14B for marking the information symbol 15 are formed on both the wheel side mounting surface 12 and the hub side mounting surface 13 of the fastening wall 7, but the information symbol 15 is given. The circular grooves 14 </ b> A and 14 </ b> B may be formed only on one mounting surface 13 .
In this case, since the circular groove 14B is formed in the hub side mounting surface 13, deterioration with time is reduced. That is, the hub-side mounting surface 13 is positioned on the back side with respect to the wheel 3 in a state where the brake disc 1 is mounted on the vehicle body, so that water and mud splashing from the wheel hardly adhere to the groove. The information symbol 15 is unlikely to deteriorate over time.

FIG. 5 shows a second embodiment of the present invention.
In this embodiment, the braking rotator according to the present invention is applied to a drum type brake device. In FIG. 5, reference numeral 21 denotes a brake drum which is a braking rotator.
The brake drum 21 includes a cylindrical wall 23 on which the brake shoe 22 is disposed inside, and a flat fastening wall 24 attached to a hub (not shown) on the axle side. It is integrally formed at the outer end in the width direction. An opening 25 is formed at the center of the fastening wall 24, and a plurality of bolt insertion holes 26 are formed at the outer peripheral edge of the opening 25. The wheel and the hub on the axle side are in contact with the front and back of the fastening wall 24 and are fastened to the wheel and the hub by bolts that pass through the bolt insertion holes 26.
A circular groove 28 centering on the rotation center P is formed at the edge of the opening 25 of the hub side mounting surface 27 of the fastening wall 24 (a region radially inward of the bolt insertion hole 26). An information symbol (not shown) such as a production lot number is engraved on the bottom of 28.

Also in this embodiment, since the information symbol is engraved in the circular groove 28 formed in the hub side mounting surface 27 of the fastening wall 24, the influence of the distortion generated when the information symbol is engraved is circular. Is limited to the inner area of the groove 28. For this reason, the contact of the fastening wall 24 against the hub or wheel does not become uneven, and the component strength does not become unbalanced in the circumferential direction.
In the case of this embodiment, since the information symbol is formed on the hub side mounting surface 27 inside the brake drum 21, water and mud splashed from the wheel side are difficult to adhere to the information symbol, and information is deteriorated due to deterioration over time. There is no worry that the symbol cannot be confirmed.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

FIG. 3 is an exploded cross-sectional view showing an assembled state of the braking rotator according to the first embodiment of the present invention. The figure which combined and described the perspective view (A) seen from the surface side of the braking rotation body of the embodiment, and the perspective view seen from the back surface side. The front view of the braking rotation body of the embodiment. The enlarged view of the A section of FIG. The disassembled perspective view of the brake rotating body of 2nd Embodiment of this invention.

Explanation of symbols

1 ... Brake disc (braking rotating body)
7, 24 ... Fastening wall 13, 27 ... Hub side mounting surface 14A, 14B, 28 ... Circular groove 15 ... Information symbol 21 ... Brake drum

Claims (1)

A braking rotator of a brake device that rotates integrally with a wheel and generates a braking force when a friction material is pressed against the wheel;
A circular groove centered on the center of rotation was formed on the mounting surface on the axle side of the flat plate-like fastening wall fastened to the axle side and the wheel side, and an information symbol was attached to the inside of the circular groove. A brake rotating body of a brake device characterized by the above.

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