Jack with a protecting structure of a pump piston and method for using the same

A jack with a protecting structure of a pump piston, comprising a housing, a base located inside the housing, and the protecting structure;

• wherein an oil cylinder and a pump body are installed on the base;
• a pump piston is installed on the pump body;
• a spring is installed on the pump piston and the pump body;
• a stop protrusion is arranged on the pump piston;
• the protecting structure comprises a dustproof sleeve and a wool felt the dustproof sleeve is installed on the base and the pump piston;
• a first end of the dustproof sleeve is detachably fixed on the base through a fastener;
• a press ring is installed between the dustproof sleeve and the fastener;
• the base is further provided with a vent, and the wool felt is installed in the vent, wherein an assembly mode of the protecting structure comprises:
• step 1:
• installing the spring on the base, wherein the pump body is already installed on the base;
• step 2:
• successively sleeving a press plate, the dustproof sleeve and a cushion plate on the stop protrusion of the pump piston;
• step 3:
• plugging the wool felt into the vent of the base;
• step 4:
• installing the pump piston on the pump body, wherein the press plate, the dustproof sleeve and the cushion plate have been already installed on the pump piston;
• and
• step 5:
• sleeving the press ring into the dustproof sleeve, and fixing the press ring and the dustproof sleeve on the base through the fastener.

A jack with a protecting structure of a pump piston, comprising a housing, a base located inside the housing, and the protecting structure;

• wherein an oil cylinder and a pump body are installed on the base;
• a pump piston is installed on the pump body;
• a spring is installed on the pump piston and the pump body;
• a stop protrusion is arranged on the pump piston;
• the protecting structure comprises a dustproof sleeve and a wool felt the dustproof sleeve is installed on the base and the pump piston;
• a first end of the dustproof sleeve is detachably fixed on the base through a fastener;
• a press ring is installed between the dustproof sleeve and the fastener;
• the base is further provided with a vent, and the wool felt is installed in the vent, wherein a cushion plate is installed between the spring and a second end of the dustproof sleeve of the protecting structure, wherein the second end of the dustproof sleeve is a top end of the dustproof sleeve;
• a press plate is installed between the top end of the dustproof sleeve and the stop protrusion, wherein an assembly mode of the protecting structure comprises:
• step 1:
• installing the spring on the base, wherein the pump body is already installed on the base;
• step 2:
• successively sleeving the press plate, the dustproof sleeve and the cushion plate on the stop protrusion of the pump piston;
• step 3:
• plugging the wool felt into the vent of the base;
• step 4:
• installing the pump piston on the pump body, wherein the press plate, the dustproof sleeve and the cushion plate have been already installed on the pump piston;
• and
• step 5:
• sleeving the press ring into the dustproof sleeve, and fixing the press ring and the dustproof sleeve on the base through the fastener.