Abstract: In caliper seal structure, region on one side of caliper main body in axial direction of cylinder with respect to piston seal is set as fluid pressure side where fluid pressure is received, region on other side of caliper main body in axial direction of cylinder with respect to piston seal is set as atmospheric side that opens to atmosphere, and groove forming portion includes holding portion that sets groove width of seal groove in axial direction as first groove width and that is configured to hold piston seal by making inner side surfaces of seal groove in axial direction contact with outer side surfaces of piston seal in axial direction, respectively, and enlarged portion that sets groove width of seal groove in axial direction as second groove width which is increased to one side in axial direction so as to be greater than first groove width.

Abstract: A parking brake structure having a simple configuration that is reduced in the number of parts and weight, is provided. The parking brake structure is for use in a vehicle including a driving force transmission member and a rotation member. The driving force transmission member is configured to transmit a driving force of a power unit to a rear wheel. The rotation member is wound with the driving force transmission member while being fixed to the rear wheel. The parking brake structure includes a locking member configured to engage with the rotation member to prevent the rotation member from rotating. The rotation member has an outer circumferential end face that is formed with a plurality of protrusions and recesses between the protrusions adjacent to each other. The protrusions are used to engage with the driving force transmission member. The locking member is formed with a protrusion engageable with the recess.

Abstract: A holding structure of a tire air pressure detecting device includes a tire air pressure detecting device (23) which is held by a screw shaft (43) of a tire valve (30), a fixing nut (44) which is screwed to the screw shaft (43) and configured to fix the tire valve (40) to a wheel rim (30), a holding sleeve (50) which is screwed to the screw shaft (43) and configured to hold the tire air pressure detecting device (23) on the screw shaft (43), an elastic member (45) which is sandwiched between the tire air pressure detecting device (23) and a device supporting portion (60) including at least one of the fixing nut (44), the holding sleeve (50) and the wheel rim (30) in an axial direction of the screw shaft (43), and a rotation restricting portion (48) which is configured to restrict rotation of the tire air pressure detecting device (23) around the screw shaft (43) between the elastic member (45) and the tire air pressure detecting device (23).

Abstract: A holding structure of a tire air pressure detecting device includes a tire air pressure detecting device (23) which is held by a screw shaft (43) of a tire valve (30), a fixing nut (44) which is screwed to the screw shaft (43) and configured to fix the tire valve (40) to a wheel rim (30), a holding sleeve (50) which is screwed to the screw shaft (43) and configured to hold the tire air pressure detecting device (23) on the screw shaft (43), an elastic member (45) which is sandwiched between the tire air pressure detecting device (23) and a device supporting portion (60) including at least one of the fixing nut (44), the holding sleeve (50) and the wheel rim (30) in an axial direction of the screw shaft (43), and a rotation restricting portion (48) which is configured to restrict rotation of the tire air pressure detecting device (23) around the screw shaft (43) between the elastic member (45) and the tire air pressure detecting device (23).

Abstract: In a rear wheel suspension structure of a motorcycle includes a body frame, a swing arm swingably supported by the body frame through a pivot shaft and a drive shaft for transmitting drive power to a rear wheel. A drive shaft insertion hole is formed in the swing arm with the drive shaft being inserted in the insertion hole. The pivot shaft is arranged so as to overlap with the drive shaft insertion hole in a side view. The pivot shaft is provided as a one-side supporting shaft. Another-side supporting shaft is provided independent from each other on the left and right. A thrust bearing and a radial bearing are arranged between the swing arm and the one-side supporting shaft as well as the another-side supporting shaft provided in the swing arm.

Abstract: In a rear wheel suspension structure of a motorcycle includes a body frame, a swing arm swingably supported by the body frame through a pivot shaft and a drive shaft for transmitting drive power to a rear wheel. A drive shaft insertion hole is formed in the swing arm with the drive shaft being inserted in the insertion hole. The pivot shaft is arranged so as to overlap with the drive shaft insertion hole in a side view. The pivot shaft is provided as a one-side supporting shaft. Another-side supporting shaft is provided independent from each other on the left and right. A thrust bearing and a radial bearing are arranged between the swing arm and the one-side supporting shaft as well as the another-side supporting shaft provided in the swing arm.