The mechanical drive of brake was the first drive brakes car. It is simple in design, does not need an energy converter, since the pedal or control lever are part of it.
The disadvantages of the mechanical brake drive include:
- the difficulty of simultaneously braking all wheels and the necessary distribution of braking force;
- frequent adjustments;
- low efficiency (0.4-0.6).
Due to these shortcomings, mechanical brake actuators are currently used in a limited way and mainly in parking brake systems due to their undeniable advantage in the ability to maintain a given force for almost unlimited time, in contrast to hydraulic and especially pneumatic drives in which the pressure of the working fluid gradually decreases due to its leaks.
The mechanical brake drive is a system of levers, rods, rollers, cables through which the force from the pedal or control lever is transmitted to the brake mechanisms.
The mechanical drive of the parking brake system of cars consists of a lever with a button, a gear sector with a dog, a balancing lever, rods (cable), a lever for driving the rear wheel pads.
The parking brake system of the cars with mechanical drive of brake:
1 – handle; 2 – control lever; 3 and 8 – brackets; 4 – drive lever; 5 – cable guide; 6 – a coupling spring; 7 – adjusting clown; 9 – a cable; 10 – equalizer; 11 – equalizer thrust; 12 – thrust of the lever; 13 – a control lamp switch.
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