CN201412468Y - Anti-burst brake drum for truck - Google Patents

Abstract

The utility model relates to an anti-burst brake drum for a truck, which is characterized in that a copper-alloy sleeve is embedded in a cast-steel sleeve; a gray cast-iron sleeve is embedded in the copper-alloy sleeve; and the cast-steel sleeve and the copper-alloy sleeve are tightly fixed on the gray cast-iron sleeve by copper-alloy screws. The amount of the copper-alloy screws is more than tworows, and the amount of each row is more than two. The utility model has the advantages of that bursting can be effectively resisted; the anti-burst brake drum for a truck ensures that the brake is effective; the safety of lives and properties of people is ensured; the use life is prolonged; the use cost is reduced; and the source is saved.

Description

Truck is with preventing the explosion brake drum

Technical field

A kind of brake member of truck brake usefulness belongs to truck accessory field.

Background technique

The brake drum of truck, especially heavily card employing all is one-time formed gray cast iron cover now, and its advantage is simple in structure, low cost of manufacture, but there is easy explosion, the defective that working life is short.

Because the abrupt slope in mountain area, mining area, long slope are more, therefore in the mountain area, the heavily card that travels of mining area all is equipped with the brake drum cooling spray system.Constantly give the brake drum spray cooling heavily blocking in the running process cooling system, to obtain good braking effect.But during long-time high frequency ground apply the brakes, brake drum finally causes brake failure to lead to a disaster because of frequent quenching, annealing produce the metal fatigue explosion, very causes car crash.

Because the brake drum structure sealing, it is bad to dispel the heat, and the tensile strength of adding the gray cast iron cover is relatively poor, therefore easily explosion, and working life is short.The producer that has adopts the thickness that increases brake drum, and the method that promptly increases gray cast iron cover intensity prevents explosion, but runs counter to desire.Because along with the increase of drum thickness, more be unfavorable for heat radiation.Brake drum is thick more, and the temperature difference of its inner chamber and periphery is just big more.Cavity temperature rises rapidly in during brake, and periphery temperature under the cooling of water does not have significant change, in thermal expansion process, just formation in fast outside slowly, the internal stress of brake drum inside is increasing, finally causes explosion.Brake drum thickening method is infeasible thus.

Through investigation, tens of the annual explosion brake drums of the heavily card of mining area operation, direct loss up to 10,000 yuan about.Heavily about about 70 kilograms of brake drum, one heavily annual replacing of card because of brake drum need to consume foundry goods more than one ton, cause the gray cast iron serious waste of resources.Therefore, making anti-explosion brake drum is the key subjects that need to be resolved hurrily.

Summary of the invention

The purpose of this utility model provides a kind of anti-explosion brake drum, accomplishes effectively to prevent explosion, improves working life.

Technological scheme is to stud with the Cuprum alloy cover in the cast steel cover, studs with the gray cast iron cover in the Cuprum alloy cover, and the Cuprum alloy screw is fastened on the ash casting with cast steel cover, Cuprum alloy cover and puts, and Cuprum alloy screw quantity has that two rows are above, every row is more than two.

Working principle is as follows: the cast steel cover has improved several times tensile strength and fatigue resistance than simple gray cast iron cover.The Cuprum alloy cover can be promptly produces heat during with the brake of gray cast iron cover and is delivered to cast steel fast and puts, quick heat radiating under the effect of the cooling water and air that the brake drum water spray system sprays, at this moment, the water of water spray system is not sprayed directly on to gray cast iron and puts, satisfied the gray cast iron cover and should reduce temperature, do not destroyed the requirement of interior tissue again because of the lifting rapidly of temperature.Gray cast iron overlaps the big characteristic of the friction ractor of then utilization own, produces maximum braking force.In addition, Cuprum alloy cover hardness is low, thermal expansion coefficient is big, the thermal expansion that the back produces that heats up makes the Cuprum alloy cover substantial with the space between gray cast iron cover, the cast steel cover, finish conduction of heat better, increase frictional force each other simultaneously, accomplish not produce each other tangential displacement and the shearing force of Cuprum alloy screw.

Compared with the prior art, the utility model has following characteristics:

1, because cast steel cover intensity is big, Cuprum alloy cover rapid heat dissipation, gray cast iron cover interior tissue is not damaged, and therefore can prevent explosion effectively, guarantees that brake effectively, has ensured the safety of people's lives and properties.

2, owing to rapid heat dissipation, the water of water spray system is not sprayed directly on to gray cast iron and puts, and has therefore prolonged working life, has reduced user cost.

3, saved resource.When the brake drum abrasion when to a certain degree needing to change, the gray cast iron cover quality that the utility model need be changed has only 1/4th of traditional braking drum, has therefore saved a large amount of gray cast iron resources.

Description of drawings

Fig. 1 is that truck is looked sectional view with anti-explosion brake drum master

Fig. 2 is the A portion enlarged view of Fig. 1

Fig. 3 is casting casting cover and Cuprum alloy screw schematic perspective view

Fig. 4 is a Cuprum alloy cover schematic perspective view

Fig. 5 is a gray cast iron cover schematic perspective view

Embodiment

As shown in the figure, stud with Cuprum alloy cover 2 in the cast steel cover 1, stud with gray cast iron cover 3 in the Cuprum alloy cover 2, Cuprum alloy screw 4 is fastened on cast steel cover 1, Cuprum alloy cover 2 on the gray cast iron cover 3, and Cuprum alloy screw quantity has 3 of 15 rows, every rows.

In the present embodiment, Cuprum alloy cover 2, gray cast iron cover 3 combine by cutting sth. askew into identical shaped three respectively.The purpose of cutting sth. askew is to be dispersed into hole stress point-blank longitudinally, prevents gray cast iron cover high temperature dilatancy simultaneously, reduces the expansion of gray cast iron cover high temperature cast steel is overlapped heavily stressed excessively that inner chamber produces.

In the present embodiment, Cuprum alloy screw 4 ends are drilled with rivet hole.When Cuprum alloy screw 4 is tightened, open rivet hole with blunderbuss blunderbuss, can prevent the Cuprum alloy screw from then withdraw from.

Claims (4)

1, a kind of truck is with preventing the explosion brake drum, it is characterized in that studding with in the cast steel cover (1) Cuprum alloy cover (2), stud with gray cast iron cover (3) in the Cuprum alloy cover (2), Cuprum alloy screw (4) is fastened on cast steel cover (1), Cuprum alloy cover (2) on the gray cast iron cover (3), and Cuprum alloy screw (4) quantity has that two rows are above, every row is more than two.

2, truck according to claim 1 is with anti-explosion brake drum, it is characterized in that Cuprum alloy cover (2) combines by cutting sth. askew into identical shaped three.

3, truck according to claim 1 and 2 is with anti-explosion brake drum, it is characterized in that gray cast iron cover (3) combines by cutting sth. askew into identical shaped three.

4, truck according to claim 1 and 2 is characterized in that with anti-explosion brake drum Cuprum alloy screw (4) end is drilled with rivet hole.

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