CN102418761A

CN102418761A - Two-step force amplifying electromagnetic brake for automobile

Info

Publication number: CN102418761A
Application number: CN2011102398791A
Authority: CN
Inventors: 任传波; 高学熠; 任超; 柳小伟
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2011-08-20
Filing date: 2011-08-20
Publication date: 2012-04-18
Anticipated expiration: 2031-08-20
Also published as: CN102418761B

Abstract

The invention provides a two-step force amplifying electromagnetic brake for an automobile. The two-step force amplifying electromagnetic brake comprises a brake bottom plate, brake shoes and resetting springs, and is characterized in that: the ends, hinged with the brake bottom plate, of the two brake shoes are at different ends; an electromagnetic coil, a stationary iron, a moving iron, an ejector rod, a reversing lever and two force amplifying levers are arranged; the stationary iron and the moving iron are arranged in a band-type brake way; the electromagnetic coil is sleeved on the stationary iron; one end of the ejector rod is arranged on the moving iron in a hinging way, and the other end of the ejector rod passes through the stationary iron with a clearance; one end of each force amplifying lever is hinged with the brake bottom plate, and the other ends of the two force amplifying levers are axially overlapped; the ejector rod is clamped between the overlapped ends of the two force amplifying levers; a pin shaft is inserted on through hole sliding ways of the two force amplifying levers; the other end of one force amplifying lever is provided with an axial through hole sliding chute; the through hole sliding chute and the through hole sliding way are formed on the two sides of the hinge point of the force amplifying lever with the brake bottom plate; and the middle part of the reversing lever is hinged with the brake bottom plate. The two-step force amplifying electromagnetic brake for the automobile can achieve relatively better braking effects without relatively greater current and a relatively greater number of coil turns, and has high working performance.

Description

Automobile is with secondary booster type electromagnetic brake

Technical field

The present invention provides a kind of automobile with secondary booster type electromagnetic brake, belongs to electromagnetic vehicle braking technology field.

Background technique

Electromagnetic brake is a kind of device that relies on electromagnetic field to produce the contactless force source of braking force; Generally comprise power source, boosting mechanism, brake assemblies three parts, have that speed of response is fast, complete vehicle quality is little, retardation efficiency is high, be easy to realize the advantages such as accurate control to electric current.No booster type or one-level booster type are adopted in existing research for boosting mechanism both at home and abroad more.Existing electromagnetic brake is the model that Harbin Institute of Technology's " a kind of high speed electromagnetic break dynamic analysis " is proposed.Existing break comprises coil, electromagnet, answer electromagnet, brake disc and friction disk; Wherein brake disc is loaded on the rotary axis; Friction disk is loaded on the casing, is with coil respectively on electromagnet and the answer electromagnet, and it is characterized in that: friction disk can move axially but can not rotate; When replying on the electromagnet in the coil no current when being connected with certain electric current in the coil on the electromagnet, electromagnet produces enough electromagnetic forces and makes, thereby friction disk moves downward and the brake disc friction produces braking effect; Be connected with certain electric current in the coil on replying electromagnet and in the electromagnet coil during no current, reply the electromagnetic force that electromagnet produces and make friction disk move upward, thereby make friction disk and brake disc break away from, axle is can accelerated motion.Defective is because above-mentioned break does not adopt any reinforcement form, with respect to multistage reinforcement form, will reach required braking effect, needs bigger electric current or more coil turn.Therefore, the energy consumption of break and the size and the quality of break be can increase, the saving and the recycling of vehicle energy are unfavorable for.

Summary of the invention

The purpose of this invention is to provide and a kind ofly can overcome above-mentioned defective, need not automobile that big electric current and more coil turn can produce big braking effect with secondary booster type electromagnetic brake.Its technological scheme is:

Comprise braking bottom board, two brake shoe and return springs in opposite directions, wherein an end of two brake shoes is hinged with braking bottom board respectively, and the inboard of each brake shoe all connects a return spring; The other end of return spring is fixed on the braking bottom board; It is characterized in that: the rounded end of two brake shoes and braking bottom board is not at same end, and return spring has been set up electromagnetic coil, quiet iron, moving iron, push rod, reverse lever and two isometric boosting levers away from the rounded end setting; Wherein quiet iron and moving iron are the design of C shape, band brake type is installed; Electromagnetic coil is sleeved on Jing Tieshang, and an end of quiet iron and moving iron is hinged, the other end opens, and an end of push rod is hingedly mounted on the moving iron; Quiet iron is passed in the other end gap, and the end that quiet iron is passed in the push rod gap is provided with bearing pin; One end of two boosting levers is hinged with braking bottom board respectively; The other end is overlapping vertically; And the overlapping ends of two boosting levers is equipped with through hole slideway vertically, and push rod is clamped between the overlapping ends of two boosting levers, and bearing pin is through on the through hole slideway of two boosting levers; The other end of a boosting lever is provided with through hole chute vertically; The both sides of through hole chute and through hole slideway separation boosting lever and braking bottom board articulating point; The middle part and the braking bottom board of reverse lever are hinged; Reverse lever is provided with bearing pin near the top of through hole chute one end, and bearing pin is inserted in the through hole chute; When electromagnetic coil was not switched on, the axis of reverse lever and two boosting levers was positioned on the same vertical surface, and the non-rounded end of a brake shoe is pressed close in the end of reverse lever, and another boosting lever is pressed close to the non-rounded end of another brake shoe away from an end of through hole slideway; When electromagnetic coil was switched on, around rotating with the articulating point of braking bottom board separately, reverse lever was pressed to the non-rounded end of a brake shoe respectively for two boosting levers, and another boosting lever is pressed to the non-rounded end of another brake shoe away from an end of through hole slideway.

Its working principle is: when break is not worked; The electromagnetic coil no electric circuit; The axis of reverse lever and two boosting levers is positioned on the same vertical surface; The inwall of the non-rounded end of a brake shoe is pressed close in the end of reverse lever, and another boosting lever is pressed close to the inwall of the non-rounded end of another brake shoe away from an end of through hole slideway, and the non-rounded end of two brake shoes does not open; During braking, electromagnetic coil feeds electric current, and quiet iron produces electromagnetic attraction; Moving iron rotates around the articulating point with quiet iron; Moving iron reduces with the flared end distance of quiet iron, and push rod stretches out outside quiet iron, drive two boosting levers respectively around separately with the articulating point rotation of braking bottom board; An end that is not provided with the boosting lever of through hole chute is pressed to the non-rounded end inwall of a brake shoe; The inwall of the through hole chute of another boosting lever drives the non-rounded end inwall that reverse lever is pressed to another brake shoe, and the non-rounded end of two brake shoes opens, and realizes the braking to automotive hub.

The present invention compared with prior art, its advantage is:

1, adopts secondary reinforcement form; The band-type brake mechanism that the electromagnetic force that the electromagnet that at first is made up of moving iron and quiet iron produces forms through electromagnet carries out the reinforcement of the first order; Carry out partial reinforcement by boosting lever then, finally form braking force, the reinforcement multiple can reach more than 6 times; Than existing break higher reinforcement multiple is arranged; Therefore under the requirement that produces identical braking force, the used electromagnet size of the present invention, coil turn, operating current are all less, help the saving and the recovery of braking energy.

2, in the power source part that adopts electromagnet as break; Electromagnet is designed to the boosting mechanism of band-type brake form as the first order; This particular design makes whole brake structural compact, is easy to install, and is easy to the design and the layout of next stage boosting mechanism simultaneously.

Description of drawings

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

Fig. 2 removes braking bottom board, brake shoe and return spring, the three-dimensional structure schematic representation of remainder in embodiment illustrated in fig. 1.

Among the figure: 1, braking bottom board 2, brake shoe 3, return spring 4, electromagnetic coil 5, quiet iron 6, moving iron 7, push rod 8, reverse lever 9, boosting lever 10, bearing pin 11, through hole slideway 12, through hole chute

Embodiment

Comprise braking bottom board 1, two brake shoe 2 and return springs 3 in opposite directions, wherein an end of two brake shoes 2 is hinged with braking bottom board 1 respectively, and the inboard of each brake shoe 2 all connects a return spring 3; The other end of return spring 3 is fixed on the braking bottom board 1; It is characterized in that: the rounded end of two brake shoes 2 and braking bottom board 1 is not at same end, and return spring 3 has been set up electromagnetic coil 4, quiet iron 5, moving iron 6, push rod 7, reverse lever 8 and two isometric boosting levers 9 away from the rounded end setting; Wherein quiet iron 5 is the design of C shape with moving iron 6, band brake type is installed; Electromagnetic coil 4 is sleeved on the quiet iron 5, and an end of quiet iron 5 and moving iron 6 is hinged, the other end opens, and an end of push rod 7 is hingedly mounted on the moving iron 6; Quiet iron 5 is passed in the other end gap, and the end that quiet iron 5 is passed in push rod 7 gaps is provided with bearing pin 10; One end of two boosting levers 9 is hinged with braking bottom board 1 respectively; The other end is overlapping vertically; And the overlapping ends of two boosting levers 9 is equipped with through hole slideway 11 vertically; Push rod 7 is clamped between the overlapping ends of two boosting levers 9, and bearing pin 10 is through on the through hole slideway 11 of two boosting levers 9; The other end of a boosting lever 9 is provided with through hole chute 12 vertically; Through hole chute 12 and the both sides of through hole slideway 11 separation boosting levers 9 with braking bottom board 1 articulating point; The middle part of reverse lever 8 and braking bottom board 1 are hinged; Reverse lever 8 is provided with bearing pin 10 near the top of through hole chute 12 1 ends, and bearing pin 10 is inserted in the through hole chute 12; When electromagnetic coil 4 is not switched on; The axis of reverse lever 8 and two boosting levers 9 is positioned on the same vertical surface; A brake shoe 2 non-rounded ends are pressed close in the end of reverse lever 8, and another boosting lever 9 is pressed close to another brake shoe 2 non-rounded ends away from an end of through hole slideway 11; When electromagnetic coil 4 energising, around rotating with the articulating point of braking bottom board 1 separately, reverse lever 8 is pressed to the non-rounded end of a brake shoe 2 respectively for two boosting levers 9, and another boosting lever 9 is pressed to the non-rounded end of another brake shoe 2 away from an end of through hole slideway 11.

Claims

1. an automobile is with secondary booster type electromagnetic brake; Comprise braking bottom board (1), two brake shoe (2) and return springs (3) in opposite directions, wherein an end of two brake shoes (2) is hinged with braking bottom board (1) respectively, and the inboard of each brake shoe (2) all connects a return spring (3); The other end of return spring (3) is fixed on the braking bottom board (1); It is characterized in that: the rounded end of two brake shoes (2) and braking bottom board (1) is not at same end, and return spring (3) has been set up electromagnetic coil (4), quiet iron (5), moving iron (6), push rod (7), reverse lever (8) and two isometric boosting levers (9) away from the rounded end setting; Wherein quiet iron (5) and moving iron (6) are the design of C shape, band brake type is installed; Electromagnetic coil (4) is sleeved on the quiet iron (5), and an end of quiet iron (5) and moving iron (6) is hinged, the other end opens, and an end of push rod (7) is hingedly mounted on the moving iron (6); Quiet iron (5) is passed in the other end gap, and the end that quiet iron (5) is passed in push rod (7) gap is provided with bearing pin (10); One end of two boosting levers (9) is hinged with braking bottom board (1) respectively; The other end is overlapping vertically; And the overlapping ends of two boosting levers (9) is equipped with through hole slideway (11) vertically; Push rod (7) is clamped between the overlapping ends of two boosting levers (9), and bearing pin (10) is through on the through hole slideway (11) of two boosting levers (9); The other end of a boosting lever (9) is provided with through hole chute (12) vertically; The both sides of through hole chute (12) and through hole slideway (11) separation boosting lever (9) and braking bottom board (1) articulating point; The middle part of reverse lever (8) and braking bottom board (1) are hinged; Reverse lever (8) is provided with bearing pin (10) near the top of through hole chute (12) one ends, and bearing pin (10) is inserted in the through hole chute (12); When electromagnetic coil (4) when not switching on; The axis of reverse lever (8) and two boosting levers (9) is positioned on the same vertical surface; The non-rounded end of a brake shoe (2) is pressed close in the end of reverse lever (8), and another boosting lever (9) is pressed close to the non-rounded end of another brake shoe (2) away from an end of through hole slideway (11); When electromagnetic coil (4) is switched on; Two boosting levers (9) are respectively around rotating with the articulating point of braking bottom board (1) separately; Reverse lever (8) is pressed to the non-rounded end of a brake shoe (2), and another boosting lever (9) is pressed to the non-rounded end of another brake shoe (2) away from an end of through hole slideway (11).