Multi-disc friction type shifting clutch

Abstract

A multi-disc friction clutch includes a main shaft with a first pressure oil duct and a first piston and a first friction pair, which are arranged side by side. The cylinder body includes the main body of the cylinder body and a first canister body connected with one side of the main body of the cylinder body. The interference fit occurs between the main shaft and the main body of the cylinder body. The circumference of the main body of the cylinder body is provided with a gear ring. The first piston and the first friction pair are arranged in the space enclosed by the main body of the cylinder body and the first canister body. The first friction pair consists of a paper-based friction plate, dual sheet steel and a wave spring, wherein, the paper-based friction plate has a splined connection with the extension section with a first gear and the dual sheet steel has the splined connection with the cylinder body. The invention adopts the paper-based friction plate, the dynamic friction coefficient of which is one time higher than the dynamic friction coefficient of a copper-based plate. The characteristic makes the paper-based plate has a higher bearing capacity than the copper-based plate. When the same torque is transmitted, with the paper-based plate, the structural size of the clutch can be obviously reduced. The invention has the interference connection between the main shaft and the cylinder body in order that enough working torque can be transmitted with less radial structure.

Description

technical field [0001] The present invention relates to a multi-disc friction shift clutch. Background technique [0002] Construction machinery hydraulic transmissions generally use multi-plate friction shift clutches. The friction pairs of the clutch have a number of copper-based friction plates, dual steel plates and wave springs. The friction plates and dual steel plates are arranged alternately in the axial direction. Wave springs are provided in the annular peripheral space formed by different sizes; the above-mentioned multi-plate friction shift clutch has the following problems: 1. The coefficient of dynamic friction of the copper-based wet friction plates used is relatively small, because the friction clutch utilizes friction plates and The friction between the dual steel plates is used to transmit the working torque. Therefore, in order to transmit a large working torque, it is necessary to increase the radial size of the friction plate and the dual steel plate, or...

AI Technical Summary

Problems solved by technology

[0002] Construction machinery hydraulic transmissions generally use multi-plate friction shift clutches. The friction pairs of the clutch have a number of copper-based friction plates, dual steel plates and wave springs. The friction plates and dual steel plates are arranged alternately in the axial direction. Wave springs are provided in the annular peripheral space formed by different sizes; the above-mentioned multi-plate friction shift clutch has the following problems: 1. The coefficient of dynamic friction of the copper-based wet friction plates used is relatively small, because the friction clutch utilizes friction plates and The friction between the dual steel plates is used to transmit the working torque. Therefore, in order to transmit a large working torque, it is necessary to increase the radial size of the friction plate and the dual steel plate, or increase the axial size of the clutch to increase the friction plate and the friction plate. The number of joint surfaces of the dual steel plates; 2. In the existing structure, the fixed installation method of the clutch shaft and the cylinder body is mostly a spline connection, which is limited by the active area participating in the transmission of working torque, resulting in a large radial and Axial size; the above two points all lead to the heavy weight and large volume of the clutch, which makes it difficult to match the gearbox with several clutches in some construction machinery with special requirements, which restricts the market competitiveness of the product

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