Abstract: The present disclosure discloses a reducing noise double-channel oil pump including a pump body. The pump body connects an oil box and an actuator. Parallel distributed a small and a big flow oil channels are located between the oil box and the actuator. The small flow oil channel connects a first twin pump and first one-way valves. The big flow oil channel connects a second twin pump and second one-way valves. The pump body also disposes a reducing noise oil channel. A connection of the reducing noise oil channel and the big flow oil channel locates a one-way controlled valve. Another end of the reducing noise oil channel connects an oil pressure feedback oil way. A connection of the reducing noise oil channel and the oil pressure feedback oil way locates an oil pressure driving mechanism. The middle of the reducing noise oil channel connects an unloading oil way.

Abstract: A hollow floor-jack web-plate type chassis side panel assembly includes a side panel, a reserved installation hole on the side panel, a side panel bent edge at a lower edge of the side panel, and a web plate having an installation hole corresponding to the web plate. The web plate has an edge including first and second web plate molded edges which are perpendicular to the web plate and arranged in the same direction; the first web plate molded edge is attached and welded onto a side panel bent edge facing away from the side panel; the second web plate molded edge is attached and welded at a position on the side panel other than the side panel bent edge; and the side panel and the web plate are parallel to each other, and a hollow web is formed between the side panel and the web plate.

Abstract: A hollow floor-jack web-plate type chassis side panel assembly includes a side panel, a reserved installation hole on the side panel, a side panel bent edge at a lower edge of the side panel, and a web plate having an installation hole corresponding to the web plate. The web plate has an edge including first and second web plate molded edges which are perpendicular to the web plate and arranged in the same direction; the first web plate molded edge is attached and welded onto a side panel bent edge facing away from the side panel; the second web plate molded edge is attached and welded at a position on the side panel other than the side panel bent edge; and the side panel and the web plate are parallel to each other, and a hollow web is formed between the side panel and the web plate.