Preferably, the gap between the booster piston and the pressure-building piston ranges from 2 to 5 mm. The booster piston and the pressure-building piston have a gap against each other through the connecting rod, which facilitates the connecting rod to move in the hole of the first connecting rod when it is stressed, and offsets the vertical lateral separation force.
Both the right end of the pressure-building piston and the left end of the boosting piston are provided with an annular guide groove, and a guide ring matched with the annular guide groove is provided in the annular guide groove. The guide ring is used to drive the pressure-building piston and the boosting piston to guide the movement in the cylinder body, thereby improving the stability of the pressure-building piston and the boosting piston moving.
Both the left end of the pressure-building piston and the right end of the boost piston are provided with an annular groove, and the annular groove is sleeved with a sealing ring matched with the annular groove. Improve the sealing performance between the pressure-building piston and the booster piston and the cylinder, to avoid that the booster piston and the pressure-building piston cannot reach the required pressure during the movement process.
There is also a pressure building cavity on the right side of the pressure building piston. The right side of the pressure building cavity is provided with an oil valve connected to the left side of the pressure building piston and a return spring connected to the oil valve on the right side. The left side is inside against the left end of the cylinder. Reset pressure springs and boosting pistons are reset by setting return springs.
Significant technical effect: By setting the pressure-building piston and the boosting piston, and using the connecting rod to transmit the force between the pressure-building piston and the boosting piston, the clutch master cylinder piston is solved when the existing clutch master cylinder assembly is in working state The phenomenon of partial wear reduces the friction between the pressure-building piston and the clutch master cylinder during the movement of the pressure-building piston, reduces the wear of the pressure-building piston seal ring, and at the same time does not suffer from vertical lateral separation forces that tilt the pressure-building piston. The failure rate of the clutch master cylinder assembly is reduced.
The clutch master pump includes a cylinder block 1, a pressure build-up piston 2 is provided inside the cylinder block 1, a booster piston 3 connected to the pressure build-up piston 2 is provided on the right side of the pressure build-up piston 2, the middle of the right end surface of the pressure build-up piston 2 is A first connecting rod hole 4 is provided, and a second connecting rod hole 13 is provided in the middle of the left end surface of the boosting piston 3. The boosting piston 3 and the pressure-building piston 2 are movably connected by a connecting rod 5, and the connecting rod 5 is provided at the first link In the rod hole 4 and the second connecting rod hole 13, the left end of the connecting rod 5 is provided in the first connecting rod hole 4 and abuts against the pressure-building piston 2, and the right end of the connecting rod 5 is provided in the second connecting rod hole 13 and The booster piston 3 counteracts, the diameter of the first connecting rod hole 4 is larger than the diameter of the second connecting rod hole 13, the diameter of the second connecting rod hole 13 is equal to the diameter of the connecting rod 5, the boosting piston 3 and the pressure building piston 2 The gap between them is 2mm.