Support arm moving and grinding device based on overhead working truck manufacturing

The invention provides a support arm moving and grinding device based on overhead working truck manufacturing, relates to the field of grinding, and aims to solve the problems that when different grinding requirements are met, a grinding mechanism is not convenient to mount and maintain, a multi-gear grinding force adjusting structure is lacked, and when slight grinding is needed, a heavy block is not convenient to add for stress grinding. The support arm moving and grinding device comprises a moving part, the bottom of the moving part is of an arc-shaped structure, a threaded hole is formed in the bottom of the moving part, a moving table comprises an adjusting plate, two round holes are formed in the adjusting plate, guide rods are inserted into the round holes, the bottom of the adjusting plate makes contact with the top ends of springs on the outer sides of the guide rods, and the adjusting plate is inserted into limiting grooves. When the grinding force needs to be adjusted, the inner end of the adjustin