CN101852259A

CN101852259A - Drum brake

Info

Publication number: CN101852259A
Application number: CN201010201942A
Authority: CN
Inventors: 王世新
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-17
Filing date: 2010-06-17
Publication date: 2010-10-06

Abstract

The invention relates to an automobile brake drum or drum brake capable of dissipates inside and outside and thoroughly discharging pollution, which is characterized in that the barrel mouth of a brake drum is made into a barrel mouth impeller with a big external diameter. In rotation, negative pressure is generated in the brake drum; then air enters a drum barrel from the air inlets 2,3 and 5 of a barrel bottom 8 and a barrel wall 1 of the drum and is thrown and blown to a brake shoe piece and a brake friction surface 6 by an impeller slot 10 and an impeller in the barrel; soil pollution is scraped off by a groove 7 and a ventilation hole on the brake friction surface 6 and is discharged outside the drum by a barrel mouth impeller blade 9 together with brake heat. Meanwhile, radiating ribs of the outer wall of the barrel eliminates the brake heat on the outer wall of the drum barrel to the atmosphere. Thus, the problems of the heat dissipation, the cracking, the pollution discharge and the like of the drum brake are thoroughly solved, thereby greatly improving and stabilizing the brake efficiency and efficacy, controlling a brake force conveniently, and ensuring the automobile running safety.

Description

Drum brake

Technical field

The present invention relates to a kind of wheel drag, especially can the inside and outside automobile drum brake that dispels the heat.

Background technique

At present, the heat dissipation problem of automobile drum brake never obtains fine solution, when particularly forcing to move continuously between often, the temperature in the brake drum is too high, causes that the friction material tissue changes, cause thermal fatigue, be full of cracks, hickie, make the unstable or decline of retardation efficiency usefulness, have potential safety hazard, friction powder that produces during braking and the muddy water impurity that enters in the drum can't thoroughly be discharged, make braking malfunctioning easily, safety is difficult for ensureing.For this reason, the patent No.: but 01268930.0 utility model patent makes the measuring hole of heat radiation stiffening rib and exhaust on braking drum outer wall.This solves the problems referred to above and plays a good role.But radiating and cooling blowdown problem does not still have thoroughly solution, and safety still has hidden danger.

Summary of the invention

In order to overcome the bad and bad problem of blowdown of existing drum brake heat radiation, the invention provides a kind of drum brake, this drum brake can not only make the outside heat radiation of break, and can make drum brake inside ventilation, heat radiation, blowdown, makes its retardation efficiency and usefulness raising and stable.

The technical solution adopted for the present invention to solve the technical problems is: be brake area by drum shape bucket wall inwall, bucket wall outer wall has in the brake drum that constitutes at the bottom of radiating fin and the dish type bucket, or be brake area by drum shape bucket wall inwall, in the drum brake that brake drum that bucket wall outer wall constitutes at the bottom of by radiating fin and dish type bucket and disc braking bottom board are formed, brake drum bung periphery is provided with the bung impeller of bung impeller blade or bung impeller bore, be provided with intake opening in braking drum base bearing seat to the scope between the brake area limit, or be provided with intake opening at braking bottom board, or described two kinds of intake openings all are provided with.

Bung impeller blade or bung impeller bore are that centrifugal radial makes perforation bung inside and outside wall, its impeller outer diameter is more than or equal to drum wall external diameter, described intake opening is located at barrel bottom or bucket wall place or the bucket end and bucket wall junction or braking bottom board place, or described making and settlement as required everywhere.

Bucket wall inwall is provided with groove, and its groove is axial groove or spiral grooves or valley gutter, or makes the vent hole that connects bucket wall inside and outside wall.

Braking drum base bearing seat be provided with to the scope between the brake area limit in barrel internal lobe race or the bucket impeller blade or barrel in impeller.

During the brake drum rotation, the centrifugal force of the big external diameter of drum mouth impeller blade or the rotation of bung impeller bore makes the interior negative pressure that produces of the drum of path, air is got rid of by impeller in impeller blade or the bucket in intake opening, bucket internal lobe race or the bucket and blows to brake shoe and brake area, with the heat that produces in the brake drum by the bung impeller and pump to atmosphere, muddy water in the drum and assorted dirt are scraped by groove or vent hole and are rubbed through bung impeller row outside drum simultaneously.Like this, braking heat is in time discharged, because of the low retardation efficiency of braking heat drop, and improved retardation efficiency and usefulness relatively and keep Braking efficiency and efficient basicly stable.Be convenient to control braking.To have reached the purpose of ride safety of automobile.

The invention has the beneficial effects as follows, in brake drum outer wall radiating fin heat radiation, the bung impeller blade with air by impeller, groove in intake grill, the bucket, blow to brake shoe and braking drum inwall, and will brake hot and dirt and water band to atmosphere.The relative like this Braking efficiency and efficient and maintenance of having improved stablized, and is convenient to control braking, makes safety obtain guarantee.

Description of drawings

Fig. 1 is the structural representation of first embodiment of the invention

Fig. 2 is the sectional view of view among Fig. 1

Fig. 3 is the structural representation of second embodiment of the invention

Fig. 4 is the sectional view of view among Fig. 3

Fig. 5 is the structural representation of third embodiment of the invention

Fig. 6 is the sectional view of view among Fig. 5

Fig. 7 is the structural representation of the 1st kind of interior impeller of bucket among the present invention

Fig. 8 is the sectional view of view among Fig. 7

Fig. 9 is the structural representation of the 2nd kind of interior impeller of bucket among the present invention

Figure 10 is the sectional view of view among Fig. 9

Figure 11 is the structural representation of the 3rd kind of interior impeller of bucket among the present invention

Figure 12 is the sectional view of view among Figure 11

Among the figure 1, the bucket wall, 2, intake opening, 3, monitor intake opening, 4, radiating fin, 5, intake opening, 6, rubbing surface, 7, groove, 8, the bucket end, 9, bung impeller blade, 10, bucket internal lobe race, 11, braking bottom board, 12, the base plate intake opening, 13, impeller blade in the bucket, 14, the air intake filter screen, 15, vent hole, 16, outer cover plate, 17, inner cover plate, 18, fixing threaded hole, 19, bung impeller bore, 20, fixed hole, 21, inlet hole.

Embodiment:

First embodiment, as Fig. 1, shown in Figure 2, be shaped on the bung impeller blade 9 of centrifugal radial at brake drum bung periphery, bung impeller blade 9 connects bucket wall 1 inside and outside wall, bung impeller blade 9 external diameters are greater than bucket wall 1 outer wall external diameter, bung impeller blade 9 is made as one with bucket wall 1, blade axially is by roomy to narrow taper or trapezoid shaped to end face from the bucket wall 1 of root, the blade stage casing is provided with the groove on floating head braking bottom board limit, be that bung impeller middle part is provided with circular groove, bucket wall 1 inwall is shaped on groove 7, and groove 7 is spiral grooves or valley gutter, preferably axial groove, axial groove 7 from the bottom of the bucket 8 to bung, be the equality shape, preferably be the hole enlargement shape from narrow to wide, each groove 7 inner corresponding intake opening 2; The junction of 8 places and the bucket end 8 and bucket wall 1 at the bottom of intake opening 2,3,5 is prepared in barrel has squarely or circular, is horn-like; Bucket is shaped on a barrel internal lobe race 10 in the

end

8,8 radial groove or bent groove at the bottom of promptly being lower than barrel; Be shaped on 1 to 6

intake opening

2,5 in each impeller groove 10; Impeller blade in the bucket of stiffening rib shape radially can be established in bucket internal lobe race 10 next doors; The bucket end 8, is shaped on intake opening 2 and monitors intake opening 3 with bucket wall 1 junction; Bucket wall 1 thickness at brake area 6 places is more than or equal to bucket wall 1 thickness of groove 7 bottoms, and the outer wall of bucket wall 1 is shaped on radiating fin 4, and each radiating fin 4 contains covers a groove 7, and radiating fin 4 equals groove 7 degree of depth highly substantially.

When brake drum rotates, drum mouth impeller blade 9 rotary centrifugal forces in big footpath make the interior low pressure that produces of the drum of path, air is with arrow direction in scheming, air is in intake opening 2,3,5 enters drum, blow to brake area 6 and brake shoe through bucket internal lobe race 10 and centrifugal the getting rid of of bucket intra vane, by groove 7 and brake shoe and brake area 6, mud dust lane braking is hot and that groove 7 scrapes is walked, through bung impeller blade 9 and braking bottom board edge, discharge.The concavo-convex radiating fin 4 of bucket wall 1 outer wall produces air-flow differentials, with the thermal conductance of bucket wall 1 to atmosphere.

Second embodiment, as shown in Figure 3, Figure 4, bung impeller blade 9 is straight plate shape, section is trapezoidal, extend to outer wall from bucket wall 1 inwall, the bung impeller outer diameter is greater than other barrels wall 1 outer wall footpath, bucket wall 1 is provided with vent hole 15, vent hole 15 is located at the scope of brake area 6, a plurality of vent holes 15 are arranged in proper order by helix or oblique line, and on the bucket axis, vent hole 15 is the shape that interlinks during the bucket rotation, be shaped on radiating fin 4 on the outer wall of

bucket wall

1,9 cylindrical radiating fin 4 are ascending hole enlargement shape and widen shape from 8 cylindricals at the bottom of the bucket to the bung impeller blade.Vent hole 15 is between radiating fin 4.Bucket is provided with barrel an interior impeller blade 13 in the end 8, is exactly plate shape stiffening rib, and the interior impeller blade 13 of bucket is bent plate or directly plate or swash plate, and 8 is made as one at the bottom of the bucket.The root that impeller blade 13 was connected with the bucket end 8 in the bucket of 8 inwalls at the bottom of the bucket is tapered to the outer end, the bucket end 8, is shaped on intake opening 5 or monitors intake opening, intake opening 5 wall from outside to inside is ascending taper or tubaeform, be shaped on base plate intake opening 12 on the braking bottom board 11, base plate intake opening 12 preferably is located at the middle and upper part of braking bottom board 11, air intake filter screen 14 is arranged outward, and air intake filter screen 14 is dish types, is packed on the braking bottom board 11.

When brake drum rotates, 9 rotations of bung impeller blade make drum produce negative pressure, air is with arrow direction in scheming, filter screen 14 filtrations of air process air intake and base plate intake opening 12 and intake opening 5 enter in the drum, impeller blade 13 rotating centrifugals in the bucket, air concentrates blow pressure to brake area 6 and brake shoe, and vent hole 15 scrapes the silt dirt and gets rid of outside drum from brake shoe, brake simultaneously hot blast by vent hole 15 and the 9 centrifugal row pressures of bung impeller blade outside bulging.

The 3rd embodiment, shown in Figure 6 as Fig. 5, be shaped on bung impeller bore 19 at brake drum bung periphery, bung impeller bore 19 is circular hole or the elliptical apertures that make around periphery at bung, bung impeller bore 19 is the holes that connect bucket wall 1 inside and outside wall, is the radial hole heart and is located at the bung periphery uniformly; It is the same with second embodiment that brake area 6 scopes are shaped on vent hole 15, be fixed with impeller in the bucket at brake area 6 inner edges and bucket at the end 8, the impeller cylindrical touches the brake area 6 of barrel wall 1 inwall and the internal face between the intake opening 12, outer cover plate 16 internal diameters of impeller equal barrel interior impeller blade 13 internal diameters in the bucket, the external diameter of outer cover plate 16 is less than impeller outer diameter more than 1/8, inner cover plate 17 internal diameters are greater than profile ID more than 1/6, inner cover plate 17 radially extend to outer cover plate 16 external diameters near the time in bucket impeller blade 13 tilt, until concordant with the exterior edge face of impeller blade 13 in the bucket, bucket wall 1 is established intake opening 12, be located on the bucket wall 1 on plane or on the bucket wall 1 on bucket wall 1 or the inclined-plane of curved surface, base plate intake opening 12 is made circular or square, built in inner cover plate 17 rears, other are the same with second example.

In bung impeller bore 19 and brake drum rotation, the centrifugal action of bung impeller bore 19 makes and produces negative pressure in the brake drum, impeller rotation in the bucket simultaneously, 12 barrels of the inners of intake opening also produce negative pressure, and air is with arrow direction in scheming, and air enters in the bucket from intake opening 12, in inner cover plate 17 internal diameters circles and bucket impeller blade 13 inner segments, outside section, got rid of and pressed to rubbing surface 6 and brake shoe, will be braked the dirt that heat and vent hole 15 scrape, discharged by bung impeller bore 19 and vent hole 15.

Impeller in first kind of bucket, as shown in Figure 7 and Figure 8, by the impeller that curved impeller blade 13, inner cover plate 17 and outer cover plate 16 are formed, fixed hole 20 is the fixed holes 20 that install impeller, and is the same with impeller among Fig. 5,6.Be packed in the drum, air is with direction of arrow operation in scheming.

Impeller in second kind of bucket as Fig. 9 and shown in Figure 10, is the same with impeller function among Fig. 7,8, just impeller blade 13 is tiltedly to make, and inner cover plate 17 is dull and stereotyped, and external diameter equates with impeller blade 13 external diameters, also be packed in the drum by fixed hole 20, air is with direction of arrow operation in scheming.

Impeller in the third bucket, as Figure 11, shown in Figure 12, generally be packed in the interior bucket end of brake drum with fixed hole 20, be made up of outer cover plate 16, inner cover plate 17 and impeller blade 13, inner cover plate 17 equates with the interior external diameter of impeller, and the internal diameter of outer cover plate 16 is greater than profile ID more than 1/4, outer cover plate 16 external diameters are less than impeller outer diameter more than 1/5, impeller blade 13 is bent plate or straight plate, and the cylindrical of inner cover plate is shaped on inlet hole 21, and air is with direction of arrow operation in scheming.

Claims

1. brake drum, by drum shape bucket wall inwall is brake area, at the bottom of having radiating fin and dish type bucket, bucket wall outer wall constitutes, or a kind of drum brake, by drum shape bucket wall inwall is brake area, bucket wall outer wall has radiating fin, brake drum that constitutes at the bottom of the dish type bucket and discoidal braking bottom board are formed, it is characterized in that: brake drum bung periphery is provided with the bung impeller of bung impeller blade or bung impeller bore, be provided with intake opening in braking drum base bearing seat to scope between the brake area limit, or be provided with intake opening at braking bottom board, or described two kinds of intake openings are equipped with.

2. brake drum according to claim 1 or drum brake, it is characterized in that: bung impeller blade or bung impeller bore are that centrifugal radial makes perforation bung inside and outside wall, the bung impeller outer diameter is more than or equal to drum wall external diameter, described intake opening is located at barrel bottom or bucket wall place or the bucket end and bucket wall junction or braking bottom board place, or described making and settlement as required everywhere.

3. brake drum according to claim 2 or drum brake is characterized in that: bucket wall inwall is provided with groove, and its groove is axial groove or spiral grooves or valley gutter, or makes the vent hole that connects bucket wall inside and outside wall.

4. brake drum according to claim 3 or drum brake is characterized in that: braking drum base bearing seat be provided with to the scope between the brake area limit in barrel internal lobe race or the bucket impeller blade or barrel in impeller.