Device and method for preventing mistakenly stepping on an accelerator by converting acceleration into braking

A method for preventing mistakenly stepping on an accelerator by converting acceleration into braking makes use of the accelerator pedal stepping force & speed and acceleration to trigger the device for preventing mistakenly stepping on an accelerator by converting acceleration into braking, which comprises an accelerator push rod mechanism connected to an accelerator pedal and a current switch making current to a braking actuator, characterized in:

• the device for preventing mistakenly stepping on an accelerator by converting acceleration into braking also comprises an outer housing in which a worm gear & worm mechanism composed of a worm and a worm gear is mounted to drive an inner housing that can only move axially;
• the worm is mounted in the inner housing by axial limiting, and the worm gear is mounted on the inner housing;
• a rack coordinating with the worm gear through a pinion coupled with the worm gear is fixedly mounted on the outer housing;
• the accelerator push rod mechanism comprises an upper push rod, a middle push rod and a lower push rod;
• the upper part of the worm is provided with a centrifugal disc;
• a pair of pawl & iron interlocks is hinged to the centrifugal disc through a vertical shaft;
• a return torsion spring is provided between a pawl & iron interlock and the centrifugal disc;
• an axial through hole is arranged at the worm's axis center connected to the centrifugal disc;
• the middle push rod is mounted in the axial through hole by axial limiting;
• the central hole is arranged at the axis center of the middle push rod;
• the outer edge of the middle push rod is provided with a ratchet wheel that can correspondingly coordinate with pawls;
• the upper part of the middle push rod is connected to one end of the upper push rod through a push rod linkage;
• the other end of the upper push rod is connected to the accelerator pedal by radial limiting;
• the lower part of the middle push rod is connected to the upper part of the lower push rod through the push rod connecting mechanism;
• the lower push rod is connected to a slide integrated with the bottom of the outer housing through a sliding shaft that fixes the bottom of the lower push rod by radial limiting;
• the lower push rod is also connected to an accelerator cable;
• the current switch making current to the braking actuator by the middle push rod's rotating is provided between the middle push rod and the outer housing;
• when stepping on the accelerator during normal driving or for overtaking, the stepping force & speed and acceleration cannot trigger jointing of the pawls and the ratchet wheel, and the downward force on the upper push rod is transferred to the inner housing and the lower push rod through the middle push rod and the worm gear & worm mechanism for going down together, so that the lower push rod's going down drives an accelerator cable to adjust accelerator opening;
• when mistakenly stepping on the accelerator in an emergency, the stepping force & speed and acceleration make the centrifugal disc connected to the worm rotate at a high speed, triggering the jointing of the pawls and the ratchet wheel so that the middle push rod is driven to rotate, further triggering the push rod connecting mechanism to operate so that the lower push rod first extends into the central hole of the middle push rod to release the accelerator, and then triggering the current switch's making current so that the braking actuator executes braking.

A device for preventing mistakenly stepping on an accelerator by converting acceleration into braking comprises an accelerator push rod mechanism connected to an accelerator pedal and a current switch making current to a braking actuator, makes use of the accelerator pedal stepping force & speed and acceleration to trigger the conversion of acceleration into braking, characterized in that it also comprises an outer housing in which a worm gear & worm mechanism composed of a worm and a worm gear is mounted to drive an inner housing that can only move axially;

• the worm is mounted in the inner housing by axial limiting, and the worm gear is mounted on the inner housing;
• a rack coordinating with the worm gear through a pinion coupled with the worm gear is fixedly mounted on the outer housing;
• the accelerator push rod mechanism comprises an upper push rod, a middle push rod and a lower push rod;
• the upper part of the worm is provided with a centrifugal disc;
• a pair of pawl & iron interlocks is hinged to the centrifugal disc through a vertical shaft;
• a return torsion spring is provided between a pawl & iron interlock and the centrifugal disc;
• an axial through hole is arranged at the worm's axis center connected to the centrifugal disc;
• the middle push rod is mounted in the axial through hole;
• an emergency locking mechanism, which makes the middle push rod to drive the worm to move, is provided between the axial through hole and the middle push rod;
• an urgent acceleration judging spring is provided between the outer housing and the lower part of the inner housing;
• the central hole is arranged at the axis center of the middle push rod;
• the outer edge of the middle push rod is provided with a long and narrow ratchet wheel that can correspondingly coordinate with pawls over the full stroke;
• the upper part of the middle push rod is connected to one end of the upper push rod through a push rod linkage;
• the other end of the upper push rod is connected to the accelerator pedal by radial limiting;
• the lower part of the middle push rod is connected to the upper part of the lower push rod through the push rod connecting mechanism;
• the lower push rod is connected to a slide integrated with the bottom of the outer housing through a sliding shaft that fixes the bottom of the lower push rod by radial limiting;
• the lower push rod is also connected to an accelerator cable;
• the current switch making current to the braking actuator by the middle push rod's rotating is provided between the middle push rod and the outer housing;
• when stepping on the accelerator during normal driving, the accelerator pedal stepping force & speed and acceleration will not trigger the emergency locking mechanism to operate, and the worm gear & worm mechanism will neither move nor rotate so that the pawls will not achieve jointing with the long and narrow ratchet wheel, and due to the resistance from the urgent acceleration judging spring, only the upper push rod, the middle push rod and the lower push rod are linked to go down for adjusting the accelerator opening;
• when stepping on the accelerator during overtaking, there will be two situations according to the accelerator stepping force & speed and acceleration:
• the first situation—the emergency locking mechanism will still not operate, and the worm gear & worm mechanism will neither move nor rotate so that the pawls will not achieve jointing with the long and narrow ratchet wheel, and only the upper push rod, the middle push rod and the lower push rod are linked to go down for adjusting the accelerator opening;
• the second situation—the emergency locking mechanism will operate, but the worm gear & worm mechanism will move and rotate at a low or medium speed, unable to trigger the jointing of the pawls and the long and narrow ratchet wheel, and the downward force on the upper push rod is transferred to the inner housing and the lower push rod through the middle push rod and the worm gear & worm mechanism for going down together by overcoming the resistance from the urgent acceleration judging spring, so as to adjust the accelerator opening;
• when mistakenly stepping on the accelerator in an emergency, the accelerator pedal stepping force & speed and acceleration trigger the emergency locking mechanism to operate, and the downward force on the upper push rod is transferred to the inner housing through the middle push rod and the worm gear & worm mechanism for going down by overcoming the resistance from the urgent acceleration judging spring, so that the centrifugal disc connected to the worm rotates at a high speed, triggering the jointing of the pawls and the long and narrow ratchet wheel to drive the middle push rod to rotate, further triggering the push rod connecting mechanism to operate so that the lower push rod first extends into the central hole of the middle push rod to release the accelerator, and then triggering the current switch's making current so that the braking actuator executes braking.

A method for preventing mistakenly stepping on an accelerator by converting acceleration into braking makes use of the accelerator pedal stepping force & speed and acceleration to trigger the device for preventing mistakenly stepping on an accelerator by converting acceleration into braking, which comprises an accelerator push rod mechanism connected to an accelerator pedal and a current switch making current to a braking actuator, characterized in:

• the device for preventing mistakenly stepping on an accelerator by converting acceleration into braking also comprises an outer housing in which a worm gear & worm mechanism composed of a worm and a worm gear is mounted to drive an inner housing that can only move axially;
• the worm is mounted in the inner housing by axial limiting, and the worm gear is mounted on the inner housing;
• a rack coordinating with the worm gear through a pinion coupled with the worm gear is fixedly mounted on the outer housing;
• the accelerator push rod mechanism comprises an upper push rod, a middle push rod and a lower push rod;
• the upper part of the worm is provided with a centrifugal disc;
• a pair of pawl & iron interlocks is hinged to the centrifugal disc through a vertical shaft;
• a return torsion spring is provided between a pawl & iron interlock and the centrifugal disc;
• an axial through hole is arranged at the worm's axis center connected to the centrifugal disc;
• the middle push rod is mounted in the axial through hole;
• an emergency locking mechanism, which makes the middle push rod to drive the worm to move, is provided between the axial through hole and the middle push rod;
• an urgent acceleration judging spring is provided between the outer housing and the lower part of the inner housing;
• the central hole is arranged at the axis center of the middle push rod;
• the outer edge of the middle push rod is provided with a long and narrow ratchet wheel that can correspondingly coordinate with pawls over the full stroke;
• the upper part of the middle push rod is connected to one end of the upper push rod through a push rod linkage;
• the other end of the upper push rod is connected to the accelerator pedal by radial limiting;
• the lower part of the middle push rod is connected to the upper part of the lower push rod through the push rod connecting mechanism;
• the lower push rod is connected to a slide integrated with the bottom of the outer housing through a sliding shaft that fixes the bottom of the lower push rod by radial limiting;
• the lower push rod is also connected to an accelerator cable;
• the current switch making current to the braking actuator by the middle push rod's rotating is provided between the middle push rod and the outer housing;
• when stepping on the accelerator during normal driving, the accelerator pedal stepping force & speed and acceleration will not trigger the emergency locking mechanism to operate, and the worm gear & worm mechanism will neither move nor rotate, so that the pawls will not achieve jointing with the long and narrow ratchet wheel, and due to the resistance from the urgent acceleration judging spring, only the upper push rod, the middle push rod and the lower push rod are linked to go down for adjusting the accelerator opening;
• when stepping on the accelerator during overtaking, there will be two situations according to the accelerator stepping force & speed and acceleration:
• the first situation—the emergency locking mechanism will still not operate, and the worm gear & worm mechanism will neither move nor rotate, so that the pawls will not achieve jointing with the long and narrow ratchet wheel, and only the upper push rod, the middle push rod and the lower push rod are linked to go down for adjusting the accelerator opening;
• the second situation—the emergency locking mechanism will operate, but the worm gear & worm mechanism will move and rotate at a low or medium speed, unable to trigger the jointing of the pawls and the long and narrow ratchet wheel, and the downward force on the upper push rod is transferred to the inner housing and the lower push rod through the middle push rod and the worm gear & worm mechanism for going down together by overcoming the resistance from the urgent acceleration judging spring, so as to adjust the accelerator opening;
• when mistakenly stepping on the accelerator in an emergency, the accelerator pedal stepping force & speed and acceleration trigger the emergency locking mechanism to operate, and the downward force on the upper push rod is transferred to the inner housing through the middle push rod and the worm gear & worm mechanism for going down by overcoming the resistance from the urgent acceleration judging spring, so that the centrifugal disc connected to the worm rotates at a high speed, triggering the jointing of the pawls and the long and narrow ratchet wheel to drive the middle push rod to rotate, further triggering the push rod connecting mechanism to operate so that the lower push rod first extends into the central hole of the middle push rod to release the accelerator, and then triggering the current switch's making current so that the braking actuator executes braking.