CN205533901U - Heat dissipation brake disc - Google Patents

Abstract

The utility model relates to a heat dissipation brake disc, this brake disc be including dish week, dish cap, drills out the exhaust hole of multirow at the axial direction in set week, and the exhaust hole is the law along the circumference and distributes and link up mutually with the wind channel, its characterized in that: each exhaust sets up the sand grip that stretches out to hole center directions from the pore wall in hole, is it 0.4 that the area of the projected area of sand grip on the cross section of exhaust hole and exhaust hole cross section compares 0.8. Owing to set up the sand grip at the downthehole wall of above -mentioned brake disc exhaust, increased the area of contact of brake disc with the air, improved the radiating effect of brake disc.

Description

A kind of heat-dissipation brake disc

Technical field

The utility model relates to automobile technical field, is specifically related to a kind of heat-dissipation brake disc.

Background technology

In brake process brake disc and brake block friction produce substantial amounts of heat, the 60%-70% of total amount of heat is delivered on brake disc, the heat on brake disc need transmission, lose, otherwise heat gather cause temperature raise easily cause brake disc Under Thermal Fatigue Damage.The lost of heat has three kinds of modes: heat transfer, heat radiation and thermal convection current, wherein heat transfer and thermal convection current account for major part.

Brake disc is mainly made up of two parts: dish week and dish cap, it is machined with installing hole on dish cap, brake disc is connected with wheel through installing hole by stud, dish week is the working position of both sides, brake disc periphery, frictional contact surface is provided for brake block, according to dish week either with or without air channel, brake disc can be divided into solid disc and venting plate.Venting plate has many to lead to the hole sky in the center of circle, referred to as air channel on its circumference.Venting plate dish Zhou Houdu is two rubbing surfaces and the summation of air channel thickness, generally less than 30mm.In air channel, muscle bears clamping force, and rubbing surface bears frictional force and clamping force.Automobile by cross-ventilation at air channel, reaches the purpose of heat radiation in enforcement, more better than solid formula radiating effect.The advantages such as disk brake has rapid heat dissipation, lightweight, simple structure, easy to adjust.Particularly during high capacity, resistance to elevated temperatures is good, and braking effect is stable, and is not afraid of muddy water invasion and attack, and in the winter time with severe road conditions down train, disc type brake is easier to make car stop in the short period of time than drum brake.Although the brake disc of disk brake is the biggest with the area of air contact, but many times its radiating effect still can not be satisfactory, venting plate has ditch slotted disk and/or perforate dish, and the axial direction in dish week gets out plurality of rows of steam vent, and steam vent is circumferentially distributed in rule and connects with air channel.The Main Function of steam vent is heat radiation, and the Main Function of groove is to strengthen braking effect.The effect of two kinds of processing modes is all the cooling performance improving brake disc, reduces its heat fade degree, it is provided that preferably braking ability.Although its braking quality and heat radiation

Improve, but brake block is had bigger abrasion.Steam vent has an optimum diameter mated with rubbing surface thermic load simultaneously, and otherwise steam vent diameter is excessive or too small all can affect brake disc radiating effect.

Utility model content

The utility model one heat-dissipation brake disc solves the technical problem that and is: provide a kind of thermic load to be basically unchanged on the basis of the above-mentioned brake disc with steam vent, but the more preferable brake disc of radiating effect.

For solving the problems referred to above, the structure of steam vent has been done further improvement by a kind of heat-dissipation brake disc of the utility model:

A kind of heat-dissipation brake disc, this brake disc mainly includes dish week, dish cap, axial direction in dish week gets out plurality of rows of steam vent, steam vent is circumferentially distributed in rule and connects with air channel, arranging, in each steam vent described, the raised line stretched out from hole wall to hole center position, raised line projected area on steam vent cross section is 0.4-0.8 with the area ratio of steam vent cross section.

Further, described raised line along the axially in parallel extension of steam vent or tilts to extend.

Further, the inclination angle that described raised line is axial relative to steam vent is less than 90 degree.

The utility model one heat-dissipation brake disc, owing to being provided with raised line at brake disc steam vent inwall, adds the contact area of brake disc and air, has the advantage improving brake disc radiating effect.

Accompanying drawing explanation

Fig. 1 is the utility model axial sectional view of brake disc structure；

Fig. 2 is the steam vent enlarged cross sectional views of the utility model brake disc embodiment 1；

Fig. 3 is the axial cutaway view Amplified image of steam vent of the utility model brake disc embodiment 2；

Fig. 4 is the axial cutaway view Amplified image of steam vent of the utility model brake disc embodiment 3.

In Fig. 1 to Fig. 4: 1, brake disc, 11, steam vent, 12, air channel, 13, dish cap, 14, rubbing surface, 15, rubbing surface, 2, raised line.

Detailed description of the invention

Fig. 1 is the utility model axial sectional view of brake disc structure.Rubbing surface 14 and 15 is machined with multiple circular row pore 11 through with air channel 12, it is distributed according to certain aturegularaintervals, arranging the raised line 2 stretched out to hole center position from hole wall in each steam vent 11, this raised line 2 projected area summation on steam vent cross section is less than the area of steam vent 11 cross section.

Embodiment 1:

The steam vent of the utility model embodiment 1 is shown in Fig. 2, and raised line 2 is parallel with steam vent 11 axis, and the shape of cross section of raised line 2 is symmetrical, is similar to rectangle spline hole or involute spline holes, it is also possible to be asymmetrical；The shape of steam vent 11 can also be other shapes, such as rectangle, trapezoidal, triangle, ellipse etc..Raised line 2 can also be any desired shape.

Embodiment 2:

The steam vent of the utility model embodiment 2 is shown in Fig. 3, and raised line 2 extends along steam vent 11 spiral inner wall, and from the axial cross section of steam vent 11, the shape of raised line 2 is rectangle.

Embodiment 3:

The steam vent of the utility model embodiment 3 is shown in Fig. 4, and raised line 2 extends along steam vent 11 spiral inner wall, and from the axial cross section of steam vent 11, the shape of raised line 2 is triangle.

Knowable to embodiment 1, embodiment 2 and embodiment 3, raised line 2 can extend along the axially in parallel extension of steam vent 11 or inclination, inclination angle is less than 90 degree, when brake disc is in running order, raised line 2 on all steam vent 11 inwalls all effectively plays the effect of transmission heat, and heat is delivered to air from brake disc.

In order to increase radiating effect, the size of raised line 2 can not be the biggest, so raised line 2 has an optimum range, for determining its optimum size scope, carry out contrast test, when the area ratio of all raised lines 2 projected area on steam vent cross section and steam vent cross section changes between 0.4-0.8, best radiating effect can be obtained.

The utility model is not limited to the above-mentioned brake disc with air channel, is equally applicable to solid brake disc, as long as being provided with raised line 2 at steam vent 11 inwall, belongs to the scope of the utility model protection.

Claims (3)

1. a heat-dissipation brake disc, this brake disc includes dish week and dish cap, axial direction in dish week gets out plurality of rows of steam vent, steam vent is circumferentially distributed in rule and connects with air channel, it is characterized in that: arrange, in each steam vent described, the raised line stretched out from hole wall to hole center position, raised line projected area on steam vent cross section is 0.4-0.8 with the area ratio of steam vent cross section.

A kind of heat-dissipation brake disc the most according to claim 1, it is characterised in that: described raised line is along the axially in parallel extension of steam vent or tilts to extend.

A kind of heat-dissipation brake disc the most according to claim 2, it is characterised in that: the described raised line inclination angle axial relative to steam vent is less than 90 degree.