Mechanical vacuum booster for vehicle

Abstract

The invention discloses a mechanical vacuum booster for a vehicle, which comprises an input rod, a valve body, an output rod and a shell, wherein the valve body is internally provided with a spring device, a seal device, a large plunger piston, a proportion plate and a reaction plate; the parts are coaxially and sequentially arranged such as the input rod, the large plunger piston, the proportion plate, the reaction plate, the output rod and the like, a small plunger piston and a small locking plate are arranged between the large plunger piston and the proportion plate, and the small plunger piston can slide along the small locking plate; and the valve body is further internally provided with a large locking plate, the large locking plate is matched with the large plunger piston, the large locking plate can slide along the large plunger piston, and the large locking plate is linked with the small locking plate. The technical problems that the less braking force can not be amplified and is hard to keep in the prior art are solved; the mechanical vacuum booster is novel in structure and low in cost; compared with the normal booster, the mechanical vacuum booster only has two more parts; the vacuum booster can output a larger acting force to a braking main cylinder only by the means that certain input power requirement is met when the emergency braking is applied by a driver; and the pressure is kept under the condition that the input force is reduced, so that the braking distance of the whole vehicle is shortened, and the mechanical vacuum booster is particularly effective for the unskilled drivers and the braking hesitators.

Description

technical field [0001] The invention belongs to the technical field of brake assist device manufacturing for vehicles, and in particular, relates to a mechanical vacuum booster for vehicles; the vehicles referred to in the invention include but are not limited to motor vehicles with internal combustion engines as the main power source, electric motors It is the main power source vehicle; the mechanical vacuum booster involved in the present invention can obtain an increased output force and maintain a relatively constant pressure when there is a certain input power during emergency braking. Background technique [0002] At present, in the motor vehicle braking system, especially in the field of automobile braking system manufacturing technology, the mechanical vacuum booster has become a key component in the automobile braking system; the function of the vacuum booster is to use the engine intake manifold to The vacuum generated by the vacuum tube or the auxiliary vacuum pum...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the technical solution provided by the present invention is that the conventional vacuum booster in the prior art cannot rapidly increase the vacuum boosting power if the driver only applies a small pedal force when the driver applies an emergency brake. The power boosting effect of the brake will affect the braking effect of the whole vehicle; at the same time, when applying emergency braking, it will be an operational obstacle for weak or unskilled drivers, who cannot implement braking measures well, or apply large The braking force is easy to cause driver fatigue, which leads to technical problems such as related accidents, and a mechanical vacuum booster with emergency braking function is provided to solve the needs of conventional vacuum boosters for emergency braking. The driver applies a large pedal force and the disadvantages that the required pedal force is not easy to maintain, so as to ensure that the vacuum booster has sufficient boosting effect, so as to ensure the braking effect of the whole vehicle

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