Abstract: An oil sensor attachment structure includes a guide projection disposed on an upper surface of an oil passage body and a sensor case. The guide projection includes a pair of first walls, a pair of first protrusions protruding toward each other, and a second wall. A receiving portion having a first receiving opening is provided between the first walls. The second wall faces the first receiving opening in a second direction with a gap therebetween. The sensor case includes a columnar portion, a flange protruding from the columnar portion, and a facing portion that is connected to the flange and that protrudes to a position above the flange. Each of the first protrusions has a first surface facing toward the other side in the second direction. The facing portion is disposed on the other side of the first surface in the second direction and faces the first surface.

Abstract: In an oil-pressure-sensor attachment structure according to an aspect of the invention, an oil channel body includes a lower body and an upper body arranged at an upper side of the lower body in a superposed manner. The attachment structure includes the upper body, a sensor case, and a connection member including an electrical connection portion that electrically connects an external power supply with a sensor main body. The connection member contacts the upper body from the upper side. The upper body has a through hole in an up-down direction. The sensor case includes a columnar portion that extends in the up-down direction and is inserted into the through hole, a flange portion that protrudes outward in the radial direction from the columnar portion and is arranged to face the lower side of the upper body, and a first hook portion that is hooked to the connection member.

Abstract: According to an aspect of the present invention, there is provided an oil pressure sensor attaching structure in which a plurality of guide protrusion portions are disposed with a gap in a circumferential direction and surround an oil passage opening portion. The guide protrusion portions have an arc-shaped wall portion and a protrusion portion. An accommodation portion which has an accommodation opening portion opening upward is provided on an inside of the plurality of guide protrusion portions in a radial direction. The sensor case has a columnar portion, a plurality of flange portions, and an annular portion that surrounds the columnar portion. The flange portion is disposed between the upper surface and the protrusion portions in the vertical direction at a first position in the circumferential direction. The annular portion has a first portion and a second portion.

Abstract: A guide protrusion includes first walls protruding upwards from an upper face of a body, facing each other across an opening in a first direction, and first protrusions protruding from each first wall toward the other. A receptive portion between the first walls has a first opening, opening to one side in a second direction orthogonal to the first direction. The sensor case is received from the first opening following the second direction. The guide protrusion has a first movement restricting face facing another side in the second direction. The sensor case includes a columnar portion extending vertically through a gap between the first protrusions, a flange at least partially between the upper face and the first protrusions in the vertical direction, within the receptive portion, and a facing portion on the other side of the first movement restricting face in the second direction, facing the first movement restricting face.

Abstract: A groove is provided at an outer side of an outer wall of a pressure sensor in a radial direction, and opens at one end side in an axial direction of the pressure sensor. A horizontally extending stopper is provided at an inner wall of a sensor accommodation recessed portion. A fixing portion is provided on the outer side of the outer wall of the pressure sensor in the radial direction, and enters the stopper. The fixing portion protrudes outward in the radial direction from the outer wall of the pressure sensor accommodated in the accommodation recessed portion, and contacts the stopper in the axial direction.

Abstract: A sensor case includes a body portion having a circular horizontal section. An upper body 1 includes an accommodation space 4 having a wall surface having a circular horizontal section, and the body portion is inserted in the accommodation space 4 such that the body portion is capable of rotating about a central axis thereof extending in a vertical direction. A stopper 50 is arranged to project in a horizontal direction in an outer circumferential surface of the body portion. A guide groove 51 is arranged to extend in the vertical direction at the wall surface of the accommodation space 4, and is arranged to allow the stopper 50 to move therein. The upper body 1 includes a restricting portion 52 arranged to restrict a vertical movement of the stopper 50.

Abstract: A sensor casing includes a lower case and an upper case that is fixed to an upper part of the lower case. A valve body includes an upper body including an accommodation space in which a sensor casing is disposed and a lower body in which an oil passage is formed. The upper body includes a stopper that prevents downward movement of the oil pressure sensor along a central axis. The sensor casing includes an engagement portion that engages with the stopper to retain the oil pressure sensor in the accommodation space.

Abstract: Each of a plurality of hydraulic pressure sensors includes a lower case and an upper case fixed above the lower case. A valve body includes an upper body including a hole portion arranged to house the hydraulic pressure sensors, and a lower body including an oil passage. A pressed portion is defined in the lower case. The pressed portion is arranged to project horizontally in the lower case so as to be opposed to the upper case. The pressed portion is arranged to be pressed downward by a pressing portion of the upper body. At least one of the upper body and the lower body includes a positioning portion arranged to horizontally position each of the hydraulic pressure sensors in the hole portion.