Chassis combination

The utility model relates to the field of single crystal furnace chassis equipment, and particularly discloses a chassis combination. A first oil tank and a second oil tank are respectively arranged on two sides of a lower hearth; the bottom in the first oil tank is connected with a telescopic first folding barrel, the top of the first folding barrel is connected with a first pull rod penetrating out of the top of the first oil tank and capable of movably extruding the first folding barrel, and the bottom end of the first folding barrel is connected with a first water changing pipe penetrating out of the bottom of the first oil tank. The bottom in the second oil tank is connected with a telescopic second folding barrel, the top of the second folding barrel is connected with a second pull rod which penetrates out of the top of the second oil tank and can movably extrude the second folding barrel, the bottom end of the second folding barrel is connected with a second water changing pipe penetrating out of the b