CN2227385Y

CN2227385Y - Pneumatic electrnic brake switch

Info

Publication number: CN2227385Y
Application number: CN95211505U
Authority: CN
Inventors: 魏文禄
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-01
Filing date: 1995-06-01
Publication date: 1996-05-15
Anticipated expiration: 2005-06-01

Abstract

The utility model discloses a pneumatic electronic brake switch which is used for controlling the signal lamp of the trailer of a wagon. The switch of the signal lamp of the trailer of the present wagon is improved, an amplifier is added and is composed of a transistor, a current-limiting resistance and a biasing resistance; so the current of the return circuit of the switch contact is decreased, the long lifetime of the utility model is improved. A power supply is added with an electric bridge which is composed of four diodes, so the normal voltage (polarity) of the emitting electrode and the collecting electrode of the transistor can be guaranteed even if the power supply is connected inversely. The utility model has the advantage of simple structure. The vehicle which is provided with an original pneumatic brake switch can use the utility model and is not needed to be changed.

Description

Pneumatic electric brake switch

The utility model relates to a kind of pneumatic electric brake switch, is used for the signal lamp of the trailer of automobile.

The signal lamp of the trailer of vehicles such as high capacity waggon picture liberation at present, east wind, linghe all uses mechanical switch, promptly in brake compressed air promote diaphragm through driving member with switch closure and signal lamp gets the electric signal that sends, to cause that front vehicle notes, reach purpose of safety; But because the power of blinker tube is bigger, switch is frequent, and switch contact produces high temperature and is out of shape, and becomes soon and can not normally conduct electricity, and influences the operate as normal of signal lamp, and the general life-span is about 20 days, also has to use and just loses efficacy in several days.

The purpose of this utility model is for overcoming above-mentioned weak point, to now using the improvement of signal lamp switch, install amplifier additional in switching circuit, the loop current of switch contact is diminished, the signal lamp loop current is constant, the switch contact temperature is lower, thus improved greatly the life-span of this switch, for vehicle safe driving has been created condition.

The utility model content, pneumatic electric brake switch is to now using the improvement of aerodynamic brake switch, in the insulator of wiring column base, be provided with amplifier, the electric bridge that electric current is made up of via four diodes positive source flow to the F point, flow to the collector electrode C of triode by F point one tunnel, another road is to binding post and conductive spring leaf, and the negative pole of power supply connects signal lamp again to the K point through electric bridge, one the tunnel connects the emitter e of triode, and another road is through biasing resistance R ₂Connect the A point, meet the base stage b of triode by A point one tunnel, another road is through current-limiting resistance R ₁Be connected to the contact j of brake switch, conductive spring leaf and contact j are in normally open in the vehicle '; D in four diodes in the electric bridge ₁, D ₂Negative pole meet F point, D ₃, D ₄Positive pole meet signal lamp L and meet K point, D again ₂Positive pole and D ₃Negative pole connect the positive pole of power supply E, D ₁Positive pole and D ₄Negative pole connect the negative pole of power supply.

The utility model advantage, be provided with amplifier in the insulator of the binding post of pneumatic electric brake switch, make that electric current diminishes in the base stage, collector loop of brake switch and triode, switch temperature is lower, improved the life-span of this switch greatly, also reduced maintenance cost, simple in structure in addition, can need not change on now with the vehicle of aerodynamic brake switch the utility model can be installed.

Description of drawings:

Fig. 1 is the utility model cutaway view

Fig. 2 is the utility model circuit diagram

Below in conjunction with description of drawings the utility model embodiment, pneumatic electric brake switch is used for controlling the signal lamp of trailer, when vehicle brake, compressed air flows into aperture 8, compressing diaphragm 9 promotes driving member 6, the small end pushing conductive spring leaf 10 of this driving member 6 is connected electric bridge, brake switch, current-limiting resistance R that the electric current that the positive pole of power supply E flows out is formed via four diodes with contact j is closed ₁, that the base stage b after the triode conducting flow in the loop that collector electrode C constitutes electric current is less, improved the life-span of switch, flow to the loop of power cathode again through electric bridge through electric bridge, transistor collector C, emitter e, signal lamp L by power supply E positive pole, identical with voltage, the electric current in the loop of former brake switch, guarantee the brightness of original signal lamp; Be connected in A, the K point-to-point transmission has biasing resistance R ₂Electric bridge by four diodes are formed shields to triode; Promptly work as because of latch connects inverse time, electric power polarity is opposite, but still can guarantee that the sense of current of input transistor emitter e and collector electrode f is constant; Binding

post

2 and 4 is fixed on 1 li of the wiring column base of insulating material, and amplifier 3 also is contained in this insulating material, and wiring column base 1 is fixed on 5 li of connectors, and connector 5 and air inlet seat 7 are through being threaded, and an end of conductive spring leaf 10 and binding post 4 are fixing; Amplifier 3 is by triode, current-limiting resistance R ₁With biasing resistance R ₂Form.

Claims

1, a kind of pneumatic electric brake switch that comprises wiring column base, connector, air inlet seat, diaphragm, conductive spring leaf and driving member, it is characterized in that being provided with amplifier in the insulator of wiring column base, the electric bridge that electric current is made up of via four diodes the positive source F point of flowing through, be connected to transistor collector C by F point one tunnel, another road is connected to binding post 4, the negative pole of power supply meets signal lamp L and is connected to the K point again, and one the tunnel connects the emitter e of triode, and another road is through biasing resistance R ₂Connect the A point, meet the base stage b of triode by A point one tunnel, another road is through current-limiting resistance R ₁To contact J, conductive spring leaf and contact J are normally open in the vehicle ', four diode D in the electric bridge ₁, D ₂Negative pole meet F point, D ₃, D ₄Positive pole meet signal lamp L and meet K point, D again ₂Positive pole and D ₃Negative pole connect the positive pole of power supply E, D ₁Positive pole and D ₄Negative pole connect the negative pole of power supply.