Balanced de-weight brake drum

Abstract

The utility model relates to a balance de-weight brake drum which comprises a brake drum body, a boss is arranged on the brake drum body, the boss surrounds the outer circle of the brake drum body in a circular ring mode and is integrated with the brake drum body, and an inclined face is milled on the boss to serve as a de-weight face. The inclined plane is milled on the boss to serve as the de-weight surface, so that the brake drum body is not damaged and secondary stress is avoided under the condition that the dynamic balance requirement of the brake drum is met, the generation of a crack source is prevented, the possibility of cracking of the brake drum is greatly reduced, and the problem of defects in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to a brake drum, and more particularly to a balancing and weight-reducing brake drum. Background Technology

[0002] The existing brake drum balance is as follows:

[0003] Option 1 – Drill holes in the large annular reinforcing rib of the brake drum.

[0004] Disadvantages of Option 1: 1) Drilling takes a lot of time; 2) Stress concentration is likely to occur at the hole, which may cause the brake drum to crack at that point.

[0005] Option 2 – Mill an arc groove on the large annular reinforcing rib of the brake drum.

[0006] Disadvantage of Option 2: Stress concentration is prone to occur at the edge of the groove, which can cause the brake drum to crack at that point.

[0007] Option 3: Weld steel counterweights onto the outer circumference of the brake drum.

[0008] Disadvantages of Option 3: 1) The welding process is complicated; 2) The welded blocks are easy to fall off; 3) Welding can easily generate residual stress, causing the brake drum to crack. Summary of the Invention

[0009] The technical problem to be solved by this utility model is: a balancing and weight-reducing brake drum.

[0010] The technical solution to the above technical problem is: a balancing and weight-reducing brake drum, including a brake drum, a boss on the brake drum, the boss being arranged in a ring around the outer circle of the brake drum and forming an integral part of the brake drum, and the inclined surface milled on the boss serving as the weight-reducing surface.

[0011] A further technical solution of this utility model is: the width of the boss is 5-30mm and the height is 3-15mm.

[0012] The weight-removing surface is a chamfered surface on the boss, with a diameter of R and 0. <R≤10mm。

[0013] The weight-reducing surface is a transition surface provided between the boss and the outer surface of the brake drum through a slope transition method. The transition surface is a sloped surface of a ramp structure.

[0014] By adopting the above technical solution, the balanced weight-reducing brake drum of this utility model has the following beneficial effects:

[0015] This invention uses a beveled surface milled on the boss as a weight-reducing surface, which satisfies the brake drum's balance requirements without damaging the brake drum body, avoids secondary stress, and thus prevents the generation of crack sources, greatly reducing the possibility of brake drum cracking and solving the problems of existing technology.

[0016] Next, in combination with the accompanying drawings of the specification and specific embodiments, the technical features of a balanced weight-removing brake drum of the present utility model will be further described. Description of the Drawings

[0017] Figure 1 : Schematic structural diagram of a brake drum with a weight-removing surface being an arc chamfered surface.

[0018] Figure 2 : Schematic structural diagram of a brake drum with a weight-removing surface being an arc chamfered surface.

[0019] Figure 3 : Schematic structural diagram of a brake drum with a weight-removing surface being a transition surface.

[0020] Figure 4 : Schematic structural diagram of a brake drum with a weight-removing surface being a transition surface.

[0021] Figure 5 : Schematic state diagram of weight removal in a chamfered manner.

[0022] Figure 6 : Schematic state diagram of weight removal in a transition surface manner.

[0023] In the above-mentioned accompanying drawings, the descriptions of each reference numeral are as follows:

[0024] Figure 1 and Figure 2 the positions of the convex platforms are different, Figure 3 and Figure 4 the positions of the convex platforms are different.

[0025] 1 - Brake drum, 2 - Convex platform, 3 - Arc chamfered surface, 4 - Transition surface. Specific Embodiment

[0026] A balanced weight-removing brake drum includes a brake drum. A convex platform 2 is provided on the brake drum 1. The convex platform is arranged around the outer circle of the brake drum in a circular ring manner and is integrated with the brake drum. A sloping surface is milled on the convex platform as the weight-removing surface. The position of the convex platform can be at any position in the middle or at the end face. The width of the convex platform is 5 - 30 mm and the height is 3 - 15 mm. The weight-removing surface is an arc chamfered surface 31 provided on the convex platform in a chamfered manner, and the diameter of the chamfered surface is R, 0 < R ≤ 10 mm. Or, the weight-removing surface is a transition surface 32 provided between the convex platform and the outer surface of the brake drum through a sloping surface transition manner, and the transition surface is a sloping surface with a ramp structure. At the position where weight removal is required, a sloping surface is obtained by milling on the convex platform, and this sloping surface serves as the weight-removing surface, solving the problems brought by the existing weight-removing methods through drilling and grooves. For example, Figure 5 when weight removal is performed in a chamfered manner, weight removal is carried out through an arc method, Figure 5 in the figure, a circle is drawn with the center of the eccentric circle as the center, and the position of the arc chamfered surface 31 of the weight-removing surface is obtained. Figure 6 To remove duplicates using a transition surface method, use an ellipse method. Figure 6 The diagram shows the position of the transition surface 32 obtained by drawing an ellipse with the center of the ellipse as the center.

Claims

1. A balanced, de-duplicated brake drum comprising a brake drum, characterized by: The brake drum is provided with a boss, the boss is arranged in a circular ring around the outer circle of the brake drum and is integrated with the brake drum, and an inclined surface milled on the boss serves as a weight-removing surface; the weight-removing surface is an arc chamfer surface arranged on the boss in a chamfer manner, the diameter of the chamfer surface is R, and 0 < R ≤ 10 mm; or the weight-removing surface is an overpass surface arranged between the boss and the outer surface of the brake drum in a way of passing through an inclined surface, and the overpass surface is an inclined surface with a slope structure.

2. A balanced unbalanced brake drum as defined in claim 1 wherein: The width of the boss is 5-30 mm, and the height is 3-15 mm.

Images