1 results about "Fixed joint" patented technology

The invention discloses an automobile vacuum pump capable of giving an alarm. The invention is characterized in that the automobile vacuum pump comprises a pump body; an oil return exhaust joint and a vacuum joint are respectively arranged at two sides of the pump body; the top of the pump body is provided with an oil inlet joint; the pump body is connected with fixed joints at two ends of a twin-T end cap through a plurality of bolts; each fixed joint is provided with two location holes; the twin-T end cap is provided with a sealing ring which fits with the pump body; an inner cavity of the pump body is filled with cores with blades; and the cores and the blades are connected with balance strips which are connected with small alarm lamps at the bottom of the inner cavity of the pump body through springs. The automobile vacuum pump provided by the invention has a simple structure, is convenient to process and simple to replace and requires low cost. If the blades and the cores are worn, the small alarm lamps can prompt people. In addition, the automobile vacuum pump has advantages of good sealing performance, low noise and stable performance.