CN105083238A - Drum type service braking device - Google Patents
Drum type service braking device Download PDFInfo
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- CN105083238A CN105083238A CN201410195914.8A CN201410195914A CN105083238A CN 105083238 A CN105083238 A CN 105083238A CN 201410195914 A CN201410195914 A CN 201410195914A CN 105083238 A CN105083238 A CN 105083238A
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- brake
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- cheek
- braking device
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Abstract
The invention provides a drum type service braking device which comprises a brake hub, a brake base plate, brake shoes, a brake master cylinder and friction plates, wherein a hub tube of the brake hub of the brake device consists of a cylindrical surface and a conical surface combined structure; the small end of the conical surface faces the direction of a connecting flange; one section of transitional cylindrical surface is positioned between the hub tube of the brake hub and the connecting flange and is used for a mounting and positioning surface of the brake hub and the wheel hub; a mounting space of a connecting bolt is formed among the hub tube, the outer surface of the transitional cylindrical surface and the connecting flange; reinforcing ribs are uniformly distributed in the mounting space along the axial direction of the hub tube. According to the drum type service braking device disclosed by the invention, the service life of the brake hub is greatly prolonged, the working performance of the brake hub is greatly improved, safety and comfort of vehicles in the driving process are improved, and the occurrence probability of serious accidents caused by damage to the brake hub is greatly reduced; along with the prolonging of the service life of the brake hub, the manufacturing cost is reduced, and pollution to the environment is reduced.
Description
Technical field
The present invention relates to a kind of automobile running brake device, especially a kind of drum-type service braking device for autotruck.
Background technology
Service braking device is the requisite parts of self-propelled vehicle, its serviceability plays vital effect to traffic safety, current service braking device is mainly divided into two large classes, one class is drum brake system, one class is butterfly brake equipment, butterfly brake device structure is compact, and the life-span is long, but can not provide larger braking force.Drum brake system size is larger, can provide larger braking force, is widely used on goods carrying vehicle, and shortcoming is that volume is large, and complex structure, main stressed part when wherein brake hub is braking, bears larger pressure, friction force and moment of deflection stressed.Existing brake hub structural strength and radiating condition all poor, the service life of brake hub is all very short, and exceed the time limit to use and also can cause serious traffic accident, existing brake hub is generally ironcasting, produce the resource that brake hub consumption is a large amount of, cause serious environmental pollution.The structural strength of current control brake hub, one is the chemical composition and the metallographic structure that control cast iron materials, two is the wall thickness dimensions controlling brake hub, requires the weight that the product of manufacturer must reach enough namely to keep enough wall thickness in the quality loop of some buying side.Even so, existing brake hub is not high for service life yet.Existing brake hub is due to the restriction of structure in addition, reasonable not with the installation locating surface structure of wheel hub, although add strict guarantee and the right alignment of hub cylinder in man-hour, but the width of locating surface is too narrow, the requirement with wheel hub right alignment accurately cannot be ensured during installation, cause in vehicle traveling process on wheel, produce additional live load, cause vibration aggravation.
Describe the product that some improve brake hub intensity in existing patent document, but due to the restriction of brake hub structure and Impact direction, fundamentally can not solve drum-type service brake and move the shortcomings and deficiencies that device exists.
Such as: notification number is: CN101021238, the day for announcing is: the application for a patent for invention of on 08 22nd, 2007 discloses double-deck cast-iron structure brake hub, notification number is: CN201306402, and the day for announcing is: the automotive brake hub of the utility model patent built-in metal reinforcement of on 09 09th, 2009.Although these two files all disclose the technical scheme improving brake equipment heat radiation, be the increase in technology difficulty and manufacturing cost, the intensity for butt flange place does not also improve effect, the automotive brake hub of built-in metal reinforcement.Simultaneously, notification number is: CN101021238, the day for announcing is: the application for a patent for invention of on 08 22nd, 2007 discloses double-deck cast-iron structure brake hub, the strength of connection improving flange of part, due to the wall thickness structural limitations of brake hub, reinforced rib can not accomplish enough height, and the effect of reinforcement is also limited.
Summary of the invention
The object of this invention is to provide a kind of New drum type service braking device of rational in infrastructure, long service life, contrast traditional braking device, one is improve key components and parts structural strength by structural development, the service life of whole brake equipment is extended by the durability improving key components and parts, two is the distribution of forces by changing region of interest, decompose the load that brake equipment weak part bears, indirectly improve the structural strength at these positions.
In order to solve the problems of the technologies described above, technical scheme of the present invention is as follows: a kind of drum-type service braking device, comprise brake hub, back-plate, brake shoe brake cheek, checking cylinder, friction lining, brake hub is fixed on wheel hub by butt flange, rotate with wheel hub, back-plate is fixed on the flange of axle beam termination, hingedly on it be fixed with brake shoe brake cheek, brake shoe brake cheek together with friction lining checking cylinder drive under, radially move in brake hub, friction lining and brake hub hub tube inner surface form braking operation face, it is characterized in that: the brake hub hub cylinder of described brake equipment is made up of the face of cylinder and circular conical surface unitized construction, the small end of the garden conical surface is towards butt flange direction, one section of transition circle cylinder is between brake hub hub cylinder and butt flange, for the installation locating surface of brake hub and wheel hub, hub cylinder, the installing space of tie bolt is formed between transition circle outer surface of cylindrical surface and butt flange, along the uniform reinforced rib of hub cylinder axis direction in installing space.
Improvement to technique scheme: the described face of cylinder of brake hub hub cylinder and the ratio of circular conical surface axial length are between 1:0.6 to 1:1.2, and the cone angle of circular conical surface is between 30o to 45o.
Further improvement to technique scheme: the quantity of described reinforced rib is 6-20 bar, and wall thickness is 10-20mm.
Improving further again technique scheme: sized by described brake shoe brake cheek, two pieces of brake shoe brake cheek that structure is identical, the circumference of two pieces of brake shoe brake cheek is semi-circular structure, width is 0.2 to 0.4 times of brake hub hub cylinder girth, the axis of two pieces of brake shoe brake cheek is the unitized construction of the face of cylinder and circular conical surface, and tapered portion has identical cone angle with brake hub hub cylinder.
To above-mentioned be the further improvement of technical scheme: described friction lining is fixed on brake shoe brake cheek, be fixed on friction lining on a brake shoe brake cheek by independently two sections form, identical structure is had respectively with brake shoe brake cheek mounting surface, namely one section is cylindrical surface structure, one section is part pyramid like configuration, and circumferential width and cone angle are also consistent.
Beneficial effect:
A kind of drum-type service braking device of the present invention, compared with existing service braking device, the key components and parts of the present invention to brake equipment improves, main contents comprise brake hub, the improvement of brake shoe brake cheek and friction plate structure, the hub cylinder of traditional braking hub, connecting flange structure intensity ratio is poor, structural strength particularly between hub cylinder and butt flange is the poorest, and the load of bearing is maximum again, very easily occur breaking, huge disaster accident can be led to once break, the present invention is provided with some reinforced ribs between brake hub hub cylinder and butt flange, fundamentally change the Rigidity and strength of butt flange itself and brake hub hub cylinder and butt flange junction, the present invention also improves brake hub hub barrel structure, brake hub hub cylinder is changed into the unitized construction of the face of cylinder and circular conical surface by the face of cylinder, it is compact that structure becomes, being aided with reinforced rib makes hub cylinder integral structure Rigidity and strength greatly strengthen, meanwhile, due to the change of structure, the direction of braking force during car brakeing also there occurs change, part braking force is applied on brake hub axis direction, reduces the flexural load that brake hub bears, indirectly improves bending stiffness and the intensity of brake hub, further, the installation locating surface structure of the present invention to brake hub is improved, make itself and wheel hub have the more effective length that is located by connecting, improve the right alignment after two parts installations, when reducing vehicle traveling, act on the overbalance live load on wheel hub, the structure of the present invention to brake shoe brake cheek is also improved, and make its structure become compacter, intensity is higher.In sum, the present invention substantially increases service life and the serviceability of brake hub, improves the safety in vehicle travel process and traveling comfort, greatly reduces the probability of the serious accident due to brake hub breakage appearance.Along with the prolongation in brake hub service life, save manufacturing cost, reduce environmental pollution.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A-A direction view of Fig. 1.
In figure: 1 be brake shoe brake cheek, 2 for back-plate, 3 for brake hub butt flange, 4 for brake hub reinforced rib, 5 for brake hub, 6 for brake hub install locating surface, 7 for checking cylinder, 8 for friction lining, 9 for brake hub hub cylinder, 10 be wheel hub.
Detailed description of the invention
A kind of drum-type service braking device of the present invention as shown in Figure 1 and Figure 2, comprises the parts compositions such as brake shoe brake cheek 1, back-plate 2, brake hub 5, checking cylinder 7, friction lining 8.Back-plate 2, checking cylinder 7, brake shoe brake cheek 1 and friction lining 8 be composition back-plate assembly jointly, back-plate is fixed on the flange of axle beam termination, brake shoe brake cheek 1 is positioned at the hub cylinder 8 of brake hub together with friction lining 8, brake shoe brake cheek 1 is hingedly fixed on back-plate, and moves radially along brake hub hub cylinder under checking cylinder 7 drives.Brake hub 5 is by butt flange 3, reinforced rib 4, hub cylinder 9 and installation locating surface 6 form, hub cylinder 9 is made up of the unitized construction of the face of cylinder and circular conical surface, running surface when bore area is braking, brake hub butt flange 3 is for the connection with wheel hub 10, thus brake hub and wheel are connected as a single entity, when vehicle travels, brake hub rotates with wheel, the joint face of phase transition is provided with between hub cylinder 9 with butt flange 3, this joint face is circular conical surface, be provided with between butt flange 3 and joint face and locating surface 6 is installed, its inner cylinder face is the positioning reference plane that brake hub 5 is installed with wheel hub 10.
During vehicle movement, the brake hub 5 in service braking device is with wheel hub 10 synchronous rotary, and back-plate 2 rotates transfixion together with brake shoe brake cheek 1, friction lining 8, checking cylinder 7 relative to brake hub.When braking do not implemented by vehicle, brake shoe brake cheek 1 keeps minim gap together with between friction lining 8 and brake hub hub cylinder 9 running surface, and when braking implemented by vehicle, checking cylinder 7 produces an outside power, promote brake shoe brake cheek 1 to move together with the running surface of friction lining 8 towards brake hub hub cylinder 9, when two surface contact, produce friction force, the direction of friction force is the rotation stoping brake hub hub cylinder 9, resistance vehicle wheel rotation, realize the deceleration of vehicle, when braking force is enough large, vehicle stop motion.In embodiments of the present invention, brake shoe brake cheek 1, together with force direction its running surface vertical of friction lining 8, decomposes part braking force along the axis of brake hub 5, reduces the moment of flexure that brake hub 5 butt flange place bears, significantly improve force-bearing situation.Install the right alignment that locating surface 6 improves brake hub 5 and wheel hub 10, act on the overbalance live load on wheel hub when reducing vehicle traveling, brake hub reinforced rib 4 and brake shoe brake cheek reinforced rib significantly improve the Rigidity and strength of brake hub butt flange 3 and brake shoe brake cheek 1.
Claims (5)
1. a drum-type service braking device, comprise brake hub, back-plate, brake shoe brake cheek, checking cylinder, friction lining, brake hub is fixed on wheel hub by butt flange, rotate with wheel hub, back-plate is fixed on the flange of axle beam termination, hingedly on it be fixed with brake shoe brake cheek, brake shoe brake cheek together with friction lining checking cylinder drive under, radially move in brake hub, friction lining and brake hub hub tube inner surface form braking operation face, it is characterized in that: the brake hub hub cylinder of described brake equipment is made up of the face of cylinder and circular conical surface unitized construction, the small end of the garden conical surface is towards butt flange direction, one section of transition circle cylinder is between brake hub hub cylinder and butt flange, for the installation locating surface of brake hub and wheel hub, hub cylinder, the installing space of tie bolt is formed between transition circle outer surface of cylindrical surface and butt flange, along the uniform reinforced rib of hub cylinder axis direction in installing space.
2. a kind of drum-type service braking device according to claim 1, is characterized in that: the described face of cylinder of brake hub hub cylinder and the ratio of circular conical surface axial length are between 1:0.6 to 1:1.2, and the cone angle of circular conical surface is between 30o to 45o.
3. a kind of drum-type service braking device according to claim 1 and 2, is characterized in that: the quantity of described reinforced rib is 6-20 bar, and wall thickness is 10-20mm.
4. a kind of drum-type service braking device according to claim 1 and 2, it is characterized in that: sized by described brake shoe brake cheek, two pieces of brake shoe brake cheek that structure is identical, the circumference of two pieces of brake shoe brake cheek is semi-circular structure, width is 0.2 to 0.4 times of brake hub hub cylinder girth, the axis of two pieces of brake shoe brake cheek is the unitized construction of the face of cylinder and circular conical surface, and tapered portion has identical cone angle with brake hub hub cylinder.
5. a kind of drum-type service braking device according to claim 4, it is characterized in that: described friction lining is fixed on brake shoe brake cheek, be fixed on friction lining on a brake shoe brake cheek by independently two sections form, identical structure is had respectively with brake shoe brake cheek mounting surface, namely one section is cylindrical surface structure, one section is part pyramid like configuration, and circumferential width and cone angle are also consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195914.8A CN105083238A (en) | 2014-05-12 | 2014-05-12 | Drum type service braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195914.8A CN105083238A (en) | 2014-05-12 | 2014-05-12 | Drum type service braking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105083238A true CN105083238A (en) | 2015-11-25 |
Family
ID=54564831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410195914.8A Pending CN105083238A (en) | 2014-05-12 | 2014-05-12 | Drum type service braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105083238A (en) |
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2014
- 2014-05-12 CN CN201410195914.8A patent/CN105083238A/en active Pending
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151125 |
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| WD01 | Invention patent application deemed withdrawn after publication |