CN201225375Y

CN201225375Y - Multiple-sheet type double-layer brake drum

Info

Publication number: CN201225375Y
Application number: CNU2008200502332U
Authority: CN
Inventors: 黄耀葵
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2009-04-22
Anticipated expiration: 2018-07-04

Abstract

The utility model discloses a multiple disc type doublelayer brake drum which comprises a metal cast brake drum outer ring, wherein cambered cast irons corresponding to the brake drum outer ring are fixed on the internal surface of the brake drum outer ring by a bolt provided with a groove, the number of the cambered cast irons is two or three, both ends of each cambered cast iron are provided with a positive beveled angle and a negative beveled angle, and adjacent cambered cast irons are pressed and buckled together by the positive beveled angle and the negative beveled angle. The utility model is not easy to have rake angles and damage brake discs and has durability and simple structure.

Description

The double-deck brake drum of a kind of multidisc

Technical field

The utility model relates to the braking device of automobile, the double-deck brake drum of especially a kind of multidisc.

Background technique

At present, extensive use drum brake on vehicle, drum brake comprises brake drum and brake shoe, brake drum links together with wheel bolt and wheel hub, rotate with wheel hub, during braking, fixed brake shoe opens with brake drum friction-produced resistance realizes braking, thereby makes the vehicle deceleration or the parking of travelling.Because frictional heat makes the brake drum inner wall temperature sharply rise, expand with heat and contract with cold when existing vehicle brake drum is braked, cause brake drum generation explosion or rake angle phenomenon, thereby the brake block of damage and its friction influences braking effect.On the basis of former patent z1200720051361.4 and 200820047374.9 and 200820047382.3, seek a kind of more effective technological scheme and address the above problem.

The model utility content

Technical problem to be solved in the utility model provides a kind of rake angle, not fragile brake block, durable double-deck brake drum of multidisc of being difficult for.

For solving the problems of the technologies described above, the technological scheme that the utility model adopted is: the double-deck brake drum of a kind of multidisc, comprise brake drum outer ring, two or three arc cast irons, two or three arc cast irons are by being bolted to the internal surface of brake drum outer ring, and the end face of bolt is provided with groove; Stack by its angled end-face between the arc cast iron, its angled end-face that stacks is all with sense of rotation.

Described bolt head has groove, after the utility model adopts said structure, because the bolt head end face has groove, having reduced script bolt end face and circular arc cast iron brake lining is same rounded face, but cause owing to two kinds of materials of bolt and cast iron are different that in use wearing and tearing are different, cause favourable and unfavorable two sides, favourable one side is that the bolt end face is higher than cast iron a little, increased friction factor, friction plate calendering bolt end face and cast iron fluid-tight engagement, bolt is difficult for loosening, disadvantageous one side is that one section temperature contacting with friction plate of bolt is too high, and bolt expands excessive, and the cast iron temperature on every side that contact with bolt is higher than other place, aggravation cast iron thermal fatigue, two kinds of situations cause cast iron screw place cracking.And having groove, bolt solved disadvantageous one side substantially, the bolt end face and the brake block area of contact that have groove reduce, and heating value reduces relatively, and heat diffusion area increases, temperature than original not recessing is low, has solved too high by the bolt temperature and unfavorable one side that cause.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

Fig. 1 is main TV structure figure of the present utility model;

Fig. 2 is plan structure figure of the present utility model.

Among Fig. 1,2: 1, brake drum outer ring; 2, arc cast iron; 3, positively biased corner; 4, metal bisque; 5 bolts; 6, groove; 7, the anti-hypotenuse angle of positively biased relatively corner.

Embodiment

By Fig. 1, shown in Figure 2, the double-deck brake drum of a kind of multidisc of the present utility model, comprise brake drum outer ring 1, two or three arc cast irons 2, two or three arc cast irons 2 are by being bolted to the internal surface of brake drum outer ring 1, the end face of bolt 5 is provided with groove 6, described arc cast iron 2 two end part are provided with the anti-hypotenuse angle 7 of positively biased corner 3 and relative positively biased corner, stack mutually by positive and negative hypotenuse angle between the arc cast iron.

The outer surface of brake drum outer ring 1 is corrugated.Undulatory brake drum outer ring outer surface and air area of contact are big, so heat dissipating capacity is big, easy processing control.

Be provided with metal bisque 4 between brake drum outer ring 1 and the arc cast iron 2 and between the positive and negative hypotenuse of the arc cast iron angle, the packed layer that this metal bisque 4 is mixed by metallic dust and high-temperature-resistant adhesive.

The packed layer that described metal bisque is mixed by metallic dust and high-temperature-resistant adhesive.Be subjected to bolt to tighten the packed layer between them of circular arc cast iron and brake drum outer ring extruding under the active force, packed layer is filled most of small spaces full, owing to be metallic dust, the heat transfer derivative is also high.Therefore the effect of packed layer is the area of contact that increases between circular arc cast iron and the outer brake drum outer ring, so as better to conduct heat between them and contact stabilization firm, avoid point-like to contact,

Unfilled corner of the present utility model can also be other shapes, as long as the bearing surface that mutual pressurized is born in its formation.

Claims

1, the double-deck brake drum of a kind of multidisc, comprise brake drum outer ring (1), two or three arc cast irons (2), it is characterized in that: two or three arc cast irons (2) are fixed on the internal surface of brake drum outer ring (1) by bolt (5), and the end face of bolt (5) is provided with groove (6); Arc cast iron stacks by its angled end-face between (2), and its angled end-face that stacks is all with sense of rotation.

2, the double-deck brake drum of multidisc according to claim 1, it is characterized in that: the outer surface of brake drum outer ring (1) is corrugated.

3, the double-deck brake drum of multidisc according to claim 1 is characterized in that: be provided with metal bisque (4) between brake drum outer ring (1) and the arc cast iron (2) and between arc cast iron (2) angled end-face.

4, the double-deck brake drum of multidisc according to claim 3 is characterized in that: the packed layer that metal bisque (4) is mixed by metallic dust and high-temperature-resistant adhesive.