Toyoda Gosei Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Toyota Gosei Co., Ltd.

Shinya Sakai

Mitsuhiro Yoshimura

Takeshi Hattori

Takaho Kawakami

Motoki Tabuchi

Katsuhisa Ota

Wataru Matsumoto

Shoma Suzuki

Tatsuya Hirano

Jang Myong Hwan

Yoshito Arihata

Seongjun Park

An oil pump includes: a shaft member; an inner rotor configured to rotate integrally with the shaft member; an outer rotor forming a rotor chamber into which oil is sucked from a suction passage and from which the oil is discharged toward a discharge passage, between the inner rotor and the outer rotor; a body member having a recess-shaped housing chamber in which each rotor is housed so as to be rotatable about an axis; and a cover member attached so as to close the housing chamber. The rotor chamber has first and second suction ports through each of which the oil to be sucked from the suction passage passes. The oil pump includes a straightening member branching the suction passage from a main path to the first suction port side and the second suction port side.

Oil pump with straightening member branching the suction passage

An oil pump includes: a housing case made of a metal and having a rotor housing portion in which a rotor is rotatably housed, and a discharge hole through which oil within the rotor housing portion is introduced to the outside of the rotor housing portion by rotation of the rotor; and a housing made of a resin and having a case holding portion in which the rotor housing portion is held, and a discharge groove portion provided on a bottom portion of the case holding portion. The housing case has a fitting groove portion that is provided on a bottom portion of the rotor housing portion and that is fitted to the discharge groove portion so as to cover the discharge groove portion. The discharge hole is formed in the fitting groove portion.

Oil pump

A gear pump includes: an inner rotor having external teeth; an outer rotor having a tubular inner housing portion in which the inner rotor is rotatably housed in an eccentric state, and internal teeth meshing with the external teeth; a first core having a tubular rotor housing portion in which the inner and outer rotors are housed, and a flange portion projecting radially outward from a tube wall of the rotor housing portion; a board-shaped second core having a contact portion in contact with the flange portion in an axial direction, and closing an opening of the rotor housing portion; and a housing opposing the second core and made of a resin. A gap is formed between opposing surfaces of the second core and the housing in a state where the flange portion is in contact with the contact portion and the housing opposes the second core.

Gear pump

An oil pump includes: a first core in which an inner rotor having external teeth and an outer rotor having internal teeth are housed; a housing having a recess in which the first core is held; a second core disposed in contact with the first core in an axial direction; and a cover having a holding hole in which the second core is held. The first core has a first recess/projection portion formed on a first axial end surface at a side opposite to an axial end surface opposing a bottom wall of the recess. The second core has a second recess/projection portion formed on a second axial end surface that is in contact with the first axial end surface. A gap is formed between opposing surfaces of the housing and the cover in a state where the first and second axial end surfaces are in contact with each other.

Oil pump including gap between flange portion of tubular core and flange-opposing portion of resin housing

In an oil passage structure for a power transmission device including a case provided to accommodate a power transmission device, a baffle plate attached to an inner wall of the case, and an oil pump, the oil passage structure includes a supply oil passage through which oil is pumped from the oil pump to an oil supply destination via the baffle plate. The baffle plate has a structure in which two members of a plate body and a plate-shaped auxiliary member are superposed and integrated with each other. The baffle plate is provided with a plate oil passage that constitutes a portion of the supply oil passage and passes through the inside of the baffle plate. The plate oil passage is formed by a recess provided in at least one of a surface of the plate body and a surface of the auxiliary member which face to each other such that the auxiliary member is interposed on the plate body.

Oil passage structure for power transmission device

Growing community of inventors

Kiyosu, Japan

Shinya Sakai