Connecting structure for transmission gear and crankshaft of press machine

Abstract

The invention discloses a connecting structure for a transmission gear and a crankshaft of a press machine. The connecting structure comprises the crankshaft and the transmission gear; the tail end of the crankshaft is a first conical face; an inner hole of the transmission gear is a second conical face matched with the first conical face at the tail end of the crankshaft; a high-pressure oil channel is formed in the crankshaft; an oil outlet hole of the high-pressure oil channel right faces the hole wall of the inner hole of the transmission gear; one end of a gland abuts against the transmission gear; and the gland is connected with the crankshaft through a fastener. According to the connecting structure, the transmission gear is connected with the crankshaft by adopting a conical face connection mode, so that mounting is convenient and fast, the mounting speed is high, the assembly time is short. During mounting, high-pressure oil entering through the high-pressure oil channel generates hydraulic pre-tightening, so that the labor intensity can be reduced, mounting is convenient, and meanwhile, disassembly is also facilitated during disassembly. And the design of prefabricating pre-tightening force is adopted, so that the safety of parts can be effectively protected.

Description

technical field [0001] The invention relates to a connection structure between a transmission gear and a crankshaft of a press. Background technique [0002] The assembly and fastening of the transmission parts of the press has always been the most important part in the installation process of the press, and the degree of fastening also directly affects the difficulty of later disassembly. [0003] At present, the crankshaft and transmission gear of the crankshaft press are generally installed in a keyway connection or a conical surface plus a keyway connection. When installing this structure, due to the fit and fit of the flat key (or other types of keys), it needs to be disassembled and repaired many times. Pairing gap, and considering the problem of torque transmission, double-key connection will be used. Double-key connection can effectively improve the connection strength and prevent damage to the connection structure when torsion. However, the double-key connection met...

AI Technical Summary

Problems solved by technology

[0003] At present, the crankshaft and transmission gear of the crankshaft press are generally installed in a keyway connection or a conical surface plus a keyway connection. When installing this structure, due to the fit and fit of the flat key (or other types of keys), it needs to be disassembled and repaired many times. Pairing gap, and considering the problem of torque transmission, double-key connection will be used. Double-key connection can effectively improve the connection strength and prevent damage to the connection structure when torsion. However, the double-key connection method has extremely high requirements for processing and will further increase installation. difficulty

[0004] At the same time, after the long-term high-load operation of the press, it is easy to produce an impact gap, which will cause a series of press failures due to the increase in the gap of the transmission part of the press; secondly, the transmission structure of this type of press is installed in the gear box, and the operating space is generally small. It is difficult to disassemble, install and fasten the gears, especially the dismantling of the gears after the gland is fastened is the most time-consuming and laborious; finally, the existing press transmission mechanism is lacking in over-torque protection, and accidents caused by overloading sometimes occur in the market. Broken faults of crankshaft, transmission gear and flat key

Images