Belt wheel press assembling device and press assembling method

Abstract

The invention discloses a belt wheel press assembling device and a press assembling method. The device comprises a screw rod, a piston rod, a pressure plate and a telescopic drive component. The piston rod is in a sleeve shape, is arranged on the screw rod in a sleeved mode and can move on the screw rod under the action of the telescopic drive component. The pressure plate is fixed at one end of the piston rod. The two ends of the screw rod extend out of the piston rod outwards in a hanging mode. The end, close to the pressure plate, of the screw rod is provided with an external thread matched with a screw hole formed in the shaft head end face of a crankshaft and used for installing a belt wheel. The telescopic drive component has a fixed end and a telescopic end, wherein the fixed end is fixed at the end, away from the pressure plate, of the screw rod, and the telescopic end is fixed to the piston rod or the pressure plate. In the installation process, what is needed is to control stretching and contracting of the telescopic drive component, assembling of the belt wheel can be completed, the telescopic drive component can be a hydraulic oil cylinder, an air cylinder or other mechanical telescopic mechanisms, vibration influence on other assembled components of an engine is little, compared with manual hitting, labor intensity is greatly reduced, and assembling efficiency is improved.

Description

technical field [0001] The invention relates to an engine assembly technology, in particular to a belt pulley press-fitting device and a press-fitting method. Background technique [0002] During engine assembly, such as figure 1 As shown, the assembly process requires that the pulley b and the small diameter end shaft end a1 of the crankshaft a of the engine are assembled by interference fit, and an assembly tool is required to install the pulley b on the small diameter end shaft end a1. At present, there is no special assembly tool for assembly. Drive the pulley into the crankshaft small-diameter end shaft head with a hammer and a beating tool. When beating, pre-install the pulley b on the small-diameter end shaft head a1 of the crankshaft, hold the beating tool, and put one end of the beating tool close to the pulley b. Manually The hammer hits the other end of the beating tool, and repeatedly hits until the pulley b is driven into the shaft head a1 of the small diameter...

AI Technical Summary

Problems solved by technology

[0002] During engine assembly, such as figure 1 As shown, the assembly process requires that the pulley b and the small diameter end shaft end a1 of the crankshaft a of the engine are assembled by interference fit, and an assembly tool is required to install the pulley b on the small diameter end shaft end a1. At present, there is no special assembly tool for assembly. Drive the pulley into the crankshaft small-diameter end shaft head with a hammer and a beating tool. When beating, pre-install the pulley b on the small-diameter end shaft head a1 of the crankshaft, hold the beating tool, and put one end of the beating tool close to the pulley b. Manually The hammer hits the other end of the beating tool, and repeatedly hits until the pulley b is driven into the shaft head a1 of the small diameter end of the crankshaft. Since both the hammer and the beating tool are fixed manually, it is easy to cause fatigue during beating, and there are also There is a potential safety hazard when hitting the hand. At the same time, other parts of the engine will vibrate during the hammering process, which will affect the assembly quality of the engine. The existing assembly method has the defects of high labor intensity and low production efficiency.

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