Oil strainer for transmission

Abstract

An oil strainer for a transmission including a resin-made upper case which is formed in a side surface of an upper part of a communication port for communication with a pump and which has an upper flange along the outer periphery thereof, a resin-made lower case which is provided with an oil suction port in a lower surface thereof and which has a lower flange joined to the upper flange of the upper case, and a filter member which is disposed in a space formed by joining the upper and lower cases and which filters an oil flowing from the oil suction port to the communication port. The oil strainer is configured to further includes an oil suction port cover member which is so formed as to cover at least an inside upper surface of the oil suction port and which forms a passage for conducting the oil to the filter member.

1 . An oil strainer for a transmission, comprising:
 a resin-made upper case which is provided with a communication port for communication to a pump in a side surface of an upper part thereof and which has an upper flange at an outer periphery thereof;   a resin-made lower case which is provided with an oil suction port in a lower surface thereof and which has a lower flange joined to said upper flange of said upper case;   a filter member which is disposed in a space formed by joining said upper and lower cases and which filters an oil flowing from said oil suction port to said communication port; and   an oil suction port cover member which is so formed as to cover at least an inside upper surface of said oil suction port and which forms a passage for conducting said oil to said filter member.   
   
   
       2 . The oil strainer for a transmission as set forth in  claim 1 , wherein said oil suction port cover member is so formed as to cover the left and right sides and the rear side of said oil suction port or the left and right sides and the front side of said oil suction port, as viewed along the forward vehicle running direction. 
   
   
       3 . The oil strainer for a transmission as set forth in  claim 2 , wherein both an end position of said oil suction port in the direction for conducting said oil by said oil suction port cover member and the total amount of said oil in said transmission are so determined that said end position of said oil suction port is located substantially at the intersection between an oil surface at the time of a maximum vehicle acceleration and an oil surface at the time of a maximum vehicle deceleration. 
   
   
       4 . The oil strainer for a transmission as set forth in  claim 3 ,
 wherein said oil suction port cover member is opened in the forward vehicle running direction,   a tip position of said oil suction port cover member in said oil conducting direction is located as if advanced more in said forward vehicle running direction than said oil surface at the time of said maximum vehicle deceleration, and   said tip position of said oil suction port cover member is so set as to be immersed in said oil at the time of said maximum vehicle deceleration.   
   
   
       5 . The oil strainer for a transmission as set forth in  claim 3 ,
 wherein said oil suction port cover member is opened in a direction opposite to said forward vehicle running direction,   a tip position of said oil suction port cover member in said oil conducting direction is located as if advanced more in said direction opposite to said forward vehicle running direction than said oil surface at the time of said maximum vehicle acceleration, and   said tip position of said oil suction port cover member is so set as to be immersed in said oil at the time of said maximum vehicle acceleration.