High-power tractor HMCVT axial wet-type double clutch

Abstract

The invention discloses an HMCVT axial wet-type double clutch of a high-power tractor in the technical field of clutches. The clutch comprises an elastic check ring for a shaft, a deep groove ball bearing, a left output hub, a check ring clamp spring, a wave spring, a steel sheet, a clutch cylinder assembly, a piston, a friction plate, a gear hub check ring, a right output hub, a disc spring seat clamp spring, a disc spring seat, a disc spring, a piston outer diameter sealing ring and a piston inner diameter sealing ring.The processing cost and material cost are greatly reduced, the clutch has a large initial stiffness, the tail end rigidity is small, and the occupied space is small. The initial pre-tightening force of a return spring is guaranteed, meanwhile, the oil pressure needed when the stroke is finished is reduced, the problem that the oil pressure is too large when the stroke of a cylindrical spiral spring is finished is solved, and the requirement for large cooling and lubricating flow in the clutch engagement process and after engagement is completed is met; and cooling lubricating oil passing through the friction pair cannot form shear torque or the shear torque is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of clutches, in particular to a high-power tractor HMCVT axial wet double clutch. Background technique [0002] Axial wet dual clutches are widely used in automobile and tractor gearboxes because of their compact structure, high cooling and lubrication strength, large torque capacity, and smooth transmission. Generally, the axial wet double clutch has two power transmission methods: one is input through the clutch shaft, and the gears on both sides are output; the other is input through the gears on both sides, and the clutch shaft is output. The way of engagement and separation is similar to that of a general wet clutch. When one side needs to transmit power, the clutch is filled with oil to push the corresponding piston to move and compress the corresponding friction pair, and then the power is transmitted through the spline connection between the friction pair and the gear hub. When there is no need to t...

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Problems solved by technology

[0003] But at the same time, there are the following problems: generally, the clutch shaft and the gear hub are processed together, resulting in high difficulty in processing the oil hole of the clutch shaft, high cost, and waste of materials; generally, the rigidity of the return spring of the cylindrical helix is ​​fixed, and a large oil pressure is required to overcome the return. The spring reaction force has high requirements on the hydraulic system; the cooling and lubrication flow rate of the general wet clutch is fixed, which is difficult to meet the cooling and lubrication needs of the clutch under different working conditions, resulting in waste; due to the influence of machining accuracy and centrifugal force when the clutch is separated, the friction pair is free The gap is difficult to ensure, resulting in the problem of residual torque; generally, the output hub adopts the method of arranging several rows of oil holes around the circumference to allow the cooling lubricating oil to enter the friction pair. This oil inlet method is difficult to ensure that each friction pair has sufficient oil intake, resulting in local friction. The auxiliary cooling intensity is not enough; the general cooling and lubricating hydraulic chamber is open, and the cooling lubricating oil flows out through the bearing gap at low and medium speeds, so it is difficult to ensure that enough oil enters the friction pair, which affects the cooling and lubricating intensity. Based on this, the present invention designs a A high-power tractor HMCVT axial wet double clutch to solve the above problems

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