CN103089857B - Brake integrating rotary barrel type eddy current retarder and drum brake - Google Patents

Brake integrating rotary barrel type eddy current retarder and drum brake Download PDF

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Publication number
CN103089857B
CN103089857B CN201210544822.7A CN201210544822A CN103089857B CN 103089857 B CN103089857 B CN 103089857B CN 201210544822 A CN201210544822 A CN 201210544822A CN 103089857 B CN103089857 B CN 103089857B
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China
Prior art keywords
brake
retarder
coil
drum
brake drum
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CN201210544822.7A
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CN103089857A (en
Inventor
顾晓丹
何仁
时俊
汤宝
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Zhenjiang Baohua Semi-trailer Parts Co., Ltd.
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Jiangsu University
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Abstract

The invention discloses a brake integrating a rotary barrel type eddy current retarder and a drum brake, wherein the brake is used for braking and speed reduction of an automobile. A retarder outer rotor, a brake drum and a coil support are coaxial, and the coil support is located between the retarder outer rotor and the brake drum. A plurality of magnet exciting coils provided with iron cores are fixed on the coil support and are evenly distributed along the circumferential direction of the outer circle of the brake drum, the axial leads of the magnet exciting coils are located in the radial direction of the brake drum, and first gas intervals are formed between the magnet exciting coils and the retarder outer rotor, and second gas intervals are formed between the magnet exciting coils and the brake drum. Two adjacent magnet exciting coils provided with the iron cores, facing to the same gas interval, are opposite in polarity. When the automobile speed is low, a brake shoe enables a friction liner to be pressed towards the brake drum to achieve friction braking; when the automobile runs at a normal automobile speed, the magnet exciting coils are powered on to produce electromagnetic braking torque to reduce the automobile speed, and then the automobile is braked through friction. When the automobile speed is high, electromagnetic braking and friction braking act in a combined mode. Braking thermal failure is avoided, and safety performance of automobile braking is improved.

Description

A kind of Test of Rotary Eddy Current Retarder and the integrated break of drum brake
Technical field
The present invention relates to a kind of automotive brake, brake and slow down to automobile, specifically a kind of Test of Rotary Eddy Current Retarder utilizing electromagnetic principle to produce braking moment and the drum brake utilizing tribology principle to produce braking moment carry out integrated break.
Background technique
Traditional automotive friction break is divided into disk type braker and drum brake two class, utilizes the friction between brake slipper and brake disc or brake drum to reduce the speed of a motor vehicle and finally to make vehicle stop.Brake under the operating mode of high vehicle speeds, not only very serious to the wearing and tearing of the brake shoe of drum brake, and a lot of harmful dust can be produced.Meanwhile, also a large amount of noise can be produced.The Braking efficiency of drum brake is comparatively large by the impact of friction factor, and Braking efficiency is more unstable.Automobile is when emergency braking, and the transmission of drum brake braking force is slower than electromagnetic braking, control accuracy is lower, causes Braking efficiency to reduce.In continuous braking process, or under frequent brake condition, drum brake actuator temperature sharply rises, and easily produces " thermal failure ", and Braking efficiency reduction disappears even completely.Therefore, there is potential safety hazard in drum brake.
Summary of the invention
In view of existing drum brake Problems existing, the invention provides a kind of Test of Rotary Eddy Current Retarder and the integrated New Brake of drum brake, this break is integrated with Test of Rotary Eddy Current Retarder and drum brake, the working life that effectively can extend friction brake, the heat resistanceheat resistant decline performance improving break; Meanwhile, because electromagnetic braking is contactless braking, noise and dust can not be produced; And this integrated arrestor adopts Electromagnetic Control, fast response time, improve the brake safe performance of automobile when happening suddenly emergency braking.
The technical solution used in the present invention is: be made up of friction catch part and electric eddy current retarder part, friction catch part comprises brake drum, friction facing and brake shoe, electric eddy current retarder part comprises retarder external rotor, the field coil of ribbon core and coil brace, retarder external rotor, brake drum and coil brace three are coaxial, and coil brace is between retarder external rotor and brake drum; The field coil of multiple ribbon core to be fixed on coil brace and in brake drum outer ring along the circumferential direction uniform layout, the shaft axis of field coil is in the radial direction of brake drum, there is the first air gap between field coil and retarder external rotor, between field coil and brake drum, have interstice; In the face of the polarity of the field coil of adjacent 2 ribbon cores of same air gap is contrary; When the speed of a motor vehicle is low, friction facing is pressed to brake drum and realizes friction catch by brake shoe; When the normal speed of a motor vehicle travels, first produce electromagnetic braking moment to field coil energising and the speed of a motor vehicle is reduced, recycling friction catch vehicle; During speed of a motor vehicle height, electromagnetic braking and friction catch acting in conjunction.
The invention has the beneficial effects as follows:
1, the present invention is integrated with electromagnetic braking and friction catch function, reasonably can distribute the braking moment of electromagnetic braking and friction type brake, decrease the generation of heat, can avoid braking thermal failure, improves the brake safe performance of vehicle.
2, the present invention utilizes non-contact electric eddy retarder to share partial brake moment, effectively can alleviate wearing and tearing, improves break working life, and reduces the generation of harmful dust and brake noise.Improve Economy and the feature of environmental protection of vehicle use.
3, car is at a high speed and under non-emergent operating mode, first driver enables electric eddy current retarder to reduce the speed of a motor vehicle of car, then enables friction brake, can reduce the frequency of utilization of friction brake like this, prevents the Braking efficiency of friction brake from reducing.
4, under the operating mode of emergency braking, make both work, electromagnetic braking can bear sizable a part of brake load, so both can reduce the wearing and tearing to friction facing, decreases replacement cycle and the maintenance cost of friction facing simultaneously.Further, electric eddy current retarder fast response time, effectively can shorten stopping distance, substantially increases the braking ability of vehicle when high speed.
5, the electric eddy current retarder that the present invention adopts is rotary barrel type, compares disc type electric eddy current retarder, and rotary barrel type retarder total quality is light, and boundary dimension is little, is convenient to dismounting and braking moment under unit mass is larger, is conducive to realizing car load lightweight.Further, the magnetic field of rotary barrel type retarder radially distributes, and rotor clearance is not by the impact of axial float, also less on the impact of former car power train, and the vehicle be suitable for is more.
6, the electric eddy current retarder part that the present invention adopts has two retarder rotors, can form two field circuits, can produce the braking moment much larger than traditional Test of Rotary Eddy Current Retarder in the process of braking.
Accompanying drawing explanation
Fig. 1 is three-dimensional structure diagram of the present invention;
Fig. 2 is plan view of the present invention;
In figure: 1-radiating fin; 2-retarder external rotor; 3-field coil; 4-brake drum; 5-friction facing; 6-brake shoe; 7-coil brace; 8,9-air gap; 10,11-loop.
Embodiment
Shown in Fig. 1-2, the present invention is integrated electric eddy current retarder on traditional drum brake.Retain original friction catch assembly (comprising brake drum, brake shoe etc.).The present invention is made up of friction catch part and electric eddy current retarder part.Friction catch part comprises brake drum 4, friction facing 5 and brake shoe 6.Electric eddy current retarder part comprises radiating fin 1, retarder external rotor 2, the field coil 3 of ribbon core and coil brace 7.Wherein, the brake drum 4 of friction catch part is also the retarder internal rotor of electric eddy current retarder part simultaneously.
Retarder external rotor 2, brake drum 4 and cross section are that coil brace 7 three of circle is coaxial, and coil brace 7 is between retarder external rotor 2 and brake drum 4.The outer surface of retarder external rotor 2 is retarder radiating fin 1, retarder radiating fin 1 can be cast as integral type with retarder external rotor 2.Retarder external rotor 2 is bolted to connection on knuckle (vehicle front).The field coil 3 of multiple (the present invention is only to adopt 8) ribbon core is all fixed on coil brace 7, and the field coil of multiple ribbon core is in brake drum 4 outer ring along the circumferential direction uniform layout, the shaft axis of field coil 3 is in the radial direction of brake drum 4, and the angle between two field coils 3 is 45 °.Air gap 8 is had between field coil 3 and retarder external rotor 2.Air gap 9 is formed between field coil 3 and brake drum 4.In the face of the polarity of the field coil 3 of adjacent 2 ribbon cores of same air gap 8,9 is contrary.Brake drum 4 is mounted by means of bolts on the flange of hub for vehicle wheel.Brake shoe 6 is assemblied on braking bottom board, and braking bottom board bolt is connected with the flange on driving axle housing axle tube.Friction facing 5 is fixed on brake shoe 6, between brake shoe 6 and brake drum 4 by rivet.Brake shoe 6, as fixed element, when bearing motivator, rotates around its fulcrum, lining pad 5 is pressed to brake drum 4, makes both lining pad 5 and brake drum 4 produce frictional force, thus realizes braking.
When field coil 3 passes into electric current, produce exciting field, and form the first loop 10 between retarder external rotor 2, air gap 8, between brake drum 4 and air gap 9, form second servo loop 11.Now, according to electromagnetic principle, relative movement is there is due to field coil 3 and between retarder external rotor 2 and brake drum 4, retarder external rotor 2 and the inner closed traverse of brake drum 4 the magnetic flux surrounded in area change, thus produce Vorticose induction current at retarder external rotor 2 and brake drum 4 inside, the electromagnetic force contrary with direction of relative movement can be produced.According to Newton's third law: the active force between two objects and reaction force, always simultaneously on same straight line, equal and opposite in direction, direction is contrary.Therefore, retarder external rotor 2 and brake drum 4 can produce the electromagnetic torque hindering its motion, reach the effect of braking.In order to prevent retarder overheated, devise radiating fin 1 at retarder external rotor 2 outer surface.Based on this design, friction brake force and electromagnetic system power can be braked on brake drum 4 simultaneously, electromagnetic system power also realizes braking on retarder external rotor 2 simultaneously.
The present invention is integrated with electromagnetic braking on the basis of traditional drum brake.Because electromagnetic braking is contactless, there is not the problem of friction factor temperature influence, decrease the possibility of " thermal failure ".Further, the integrated use of electromagnetic braking and friction catch, can reduce the access times of friction catch, reduces the generation of brake dust and brake noise, also can improve the working life of drum brake brake shoe and friction facing.In addition, electric eddy current retarder part of the present invention is equivalent to there are inside and outside two retarder rotors, can form two field circuits, can produce the braking moment much larger than traditional Test of Rotary Eddy Current Retarder in the process of braking.
When automobile normal running, friction facing 5 and the brake drum 4 of drum brake are in separated state, do not work; Field coil 3 winding no electric circuit, no current, now retarder external rotor 2 and brake drum 4 do not have magnetic induction line to pass through, electric eddy current retarder does not also work.
When automobile needs braking, driver steps on brake petal, receives brake petal place input signal, then the electric current of demand working field coil 3 winding.After field coil 3 is energized, the coil produces electromagnetic field of meeting and side, and between retarder external rotor 2 and air gap 8, form the first loop 10, between brake drum 4 and air gap 9, form second servo loop 11.Now, according to electromagnetic principle, because field coil 3 is arranged on brake drum 4, and there is relative movement between retarder external rotor 2 and brake drum 4, retarder external rotor 2 and the inner closed traverse of brake drum 4 the magnetic flux surrounded in area change, thus produce Vorticose induction current in rotating cylinder inside, the electromagnetic force contrary with direction of relative movement can be produced, thus the electromagnetic torque hindering its motion can be produced on retarder external rotor 2 and brake drum 4, reach the effect of braking.The brake shoe 6 of friction brake is as fixed element, and when bearing motivator, to inner rotary, friction facing 5 is pressed to brake drum 4 around its fulcrum, both produce frictional force, and the direction of friction torque is also hinder retarder external rotor 2 to move, and realizes braking thus.
Under different operating mode, the working state of break of the present invention is different.When the vehicle speed is low, because electromagnetic braking moment is less, friction brake works independently, and friction facing 5 is pressed to brake drum 4 and realizes braking by brake shoe 6; When automobile travels with the normal speed of a motor vehicle, during without the need to emergency braking, can first give the energising of field coil 3 winding, produce electromagnetic braking moment, the speed of a motor vehicle is reduced, and then utilizes brake drag effect to carry out abrupt deceleration vehicle; When the speed of a motor vehicle is too high, electromagnetic braking and friction catch acting in conjunction, can make automobile stop very soon.

Claims (2)

1. a Test of Rotary Eddy Current Retarder and the integrated break of drum brake, be made up of friction catch part and electric eddy current retarder part, friction catch part comprises brake drum (4), friction facing (5) and brake shoe (6), electric eddy current retarder part comprises retarder external rotor (2), the field coil (3) of ribbon core and coil brace (7), it is characterized in that: retarder external rotor (2), brake drum (4) and coil brace (7) three are coaxial, and coil brace (7) is positioned between retarder external rotor (2) and brake drum (4); It is upper and in brake drum (4) outer ring along the circumferential direction uniform layout that the field coil (3) of multiple ribbon core is fixed on coil brace (7), the shaft axis of field coil (3) is in the radial direction of brake drum (4), there is the first air gap (8) between field coil (3) and retarder external rotor (2), between field coil (3) and brake drum (4), have interstice (9); In the face of the polarity of the field coil (3) of adjacent 2 ribbon cores of same air gap (8,9) is contrary; When the speed of a motor vehicle is low, friction facing (5) is pressed to brake drum (4) and realizes friction catch by brake shoe (6); When the normal speed of a motor vehicle travels, produce electromagnetic braking moment first to field coil (3) energising and the speed of a motor vehicle is reduced, recycling friction catch vehicle; During speed of a motor vehicle height, electromagnetic braking and friction catch acting in conjunction.
2. Test of Rotary Eddy Current Retarder according to claim 1 and the integrated break of drum brake, is characterized in that: the outer surface of retarder external rotor (2) is retarder radiating fin (1).
CN201210544822.7A 2012-12-17 2012-12-17 Brake integrating rotary barrel type eddy current retarder and drum brake Active CN103089857B (en)

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CN201210544822.7A CN103089857B (en) 2012-12-17 2012-12-17 Brake integrating rotary barrel type eddy current retarder and drum brake

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Application Number Priority Date Filing Date Title
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CN103089857B true CN103089857B (en) 2015-06-10

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Publication number Priority date Publication date Assignee Title
US9413217B2 (en) 2012-06-28 2016-08-09 General Electric Company Electromagnetic braking systems and methods
US9407187B2 (en) 2012-06-28 2016-08-02 General Electric Company System and method for improving response time of a braking unit
US9601918B2 (en) 2012-06-28 2017-03-21 General Electric Company Systems and methods for controlling acceleration of a power generator
CN104192117B (en) * 2014-08-27 2017-01-11 江苏大学 Electromagnetic brake installed on non-driving shaft of trailer and control method of electromagnetic brake
CN106080566A (en) * 2016-06-04 2016-11-09 浙江大学 Automobile composite braking method and apparatus
CN105864319A (en) * 2016-06-14 2016-08-17 合肥万向钱潮汽车零部件有限公司 Automobile brake

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Publication number Priority date Publication date Assignee Title
DE9215908U1 (en) * 1992-01-07 1993-01-28 J.M. Voith Gmbh, 7920 Heidenheim, De
JPH10313504A (en) * 1997-05-09 1998-11-24 Tokyo Buhin Kogyo Kk Controller in eddy current brake
US6698554B2 (en) * 2001-12-21 2004-03-02 Visteon Global Technologies, Inc. Eddy current brake system
CN101239589A (en) * 2008-03-10 2008-08-13 江苏大学 Electric eddy speed damper and vehicle friction brake combined controller and control method
CN102120424B (en) * 2010-12-09 2014-11-05 浙江师范大学 Controller and control method of eddy-current retarder of combined braking system
CN202094788U (en) * 2011-04-29 2011-12-28 泰乐玛汽车制动系统(上海)有限公司 Novel eddy current brake

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Inventor after: He Ren

Inventor after: Gu Xiaodan

Inventor after: Shi Jun

Inventor after: Tang Bao

Inventor before: Gu Xiaodan

Inventor before: He Ren

Inventor before: Shi Jun

Inventor before: Tang Bao

COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: GU XIAODAN HE REN SHI JUN TANG BAO TO: HE REN GU XIAODAN SHI JUN TANG BAO

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20170104

Address after: Zhenjiang City, Jiangsu province Jinding road 212006 Jingkou Industrial Park No. 33

Patentee after: Zhenjiang Baohua Semi-trailer Parts Co., Ltd.

Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301

Patentee before: Jiangsu Univ.