Manual control variable mechanism integrated with brake function under specific flow

Abstract

A manual control variable mechanism integrating a brake function under specific flow comprises a valve body, a driving lever is arranged on the valve body and rotationally connected with the valve body, a piston hole is formed in the valve body, a mandrel, a piston and a reset spring are arranged in the piston hole, the mandrel is provided with a shaft part and a shaft shoulder part, and the outer wall of the shaft part protrudes towards the inner wall of the piston hole to form the shaft shoulder part. The reset springs are arranged on the shaft parts on the two sides of the shaft shoulder part in a sleeving mode, the pistons are arranged outside the reset springs on the two sides of the shaft shoulder part in a sleeving mode, an oil guiding channel is formed in the mandrel, oil enters the piston holes through the oil inlet, the oil guiding inlet and the oil guiding outlet in sequence, and the pistons are controlled to move towards the shaft shoulder part of the mandrel; the mandrel is screwed in or selected out to adjust and change the relative position of the shaft shoulder part of the mandrel in the axial direction according to needs, the shaft shoulder part can be designed at any flow output point, the adjusting range is large, and due to axial limiting, compared with the structure of an eccentric screw, the adjusting state is stable, and controllability is high.

Description

technical field [0001] The invention relates to the field of hydrostatic continuously variable transmissions, in particular to a manually controlled variable mechanism integrating braking functions under specific flow rates. Background technique [0002] In traditional industry and agriculture, the variable speed transmission device is mainly a mechanical gearbox. This kind of gearbox realizes the speed change through different gear transmission ratios. Such a transmission needs to realize the meshing between different gears, and the meshing noise is large, and The structure is more complicated and the maintenance is inconvenient. Therefore, hydraulic continuously variable transmissions are used more and more widely. During the working process of the hydraulic continuously variable transmission, hydraulic oil is used as the transmission medium. However, because the industrial and agricultural machinery connected with the hydraulic continuously variable transmission is diffe...

AI Technical Summary

Problems solved by technology

Since the preset middle position is that the eccentric screw is connected and fixed with the valve body, if the position of the screw on the valve body is forced, the overall mold needs to be redesigned and manufactured. This is a waste of manpower and a large economic expenditure, so it is necessary A variable mechanism that can still set the neutral position at any position without changing the valve body and the overall mold

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