Abstract: A protective member includes an attachment portion that is attached to a tractor including a mid PTO shaft and a protective frame that is supported by the attachment portion and positioned not to overlap with the mid PTO shaft in a front view to protect the mid PTO shaft, and the protective frame is positioned not to overlap with the mid PTO shaft in a side view.

Abstract: A compressor includes: a shell forming an outer portion thereof and having lower part in which an oil pan is formed to store oil; a motor provided in the shell; a compression unit provided in the shell to compress a working gas when being driven by the motor; a frame fixed to the shell and supporting the compression unit; a shaft supported by the frame, connecting the motor and the compression unit, provided to transmit a turning force of the motor to the compression unit, and including an oil passage; and an oil pump provided at lower part of the shaft to draw oil from the pan and supply the oil into the oil passage. The pump includes a bypass valve that is opened, when a pressure of oil flowing in the oil passage is higher than a threshold pressure, to return part of the oil to the pan.

Abstract: A motor includes a stator unit formed by coupling plural stators to one another into an annular shape. Each of the stators has: an iron core having an arc-shaped core-back portion and a tooth portion protruding from the core-back portion, the iron core forming slot portions between the iron core and adjacent ones of the stators; insulating members disposed on both end portions, in the axial direction, of the iron core; insulating films disposed so as to be in contact with inner walls of the slot portions of the iron core; and a winding disposed in the slot portions and wound over the iron core with the insulating members and the insulating films interposed therebetween. In a portion of each of the insulating films that is in contact with the inner wall of the slot portion, at least a portion that is in contact with an outer circumferential surface of the tooth tip portion has a length in the axial direction longer than the length of the iron core in the axial direction.

Abstract: A scroll compressor includes: a shell; a compression mechanism unit accommodated in the shell and defining a compression chamber, the compression mechanism unit having a discharge port through which a discharge chamber and the compression chamber communicate with one another; a discharge valve mechanism that opens and closes the discharge port. The discharge valve mechanism includes a valve seat provided on an outlet portion of the discharge port and a valve and closes the valve seat when sitting on the valve seat. The valve seat includes an annular portion serving as an edge of an opening of the outlet portion and a valve supporting portion that is provided in a region surrounded by the inner circumference of the annular portion and divides the opening of the outlet portion into plural valve seat holes. The valve is in contact with at least a portion of the valve supporting portion and with the annular portion, when sitting on the valve seat.

Abstract: A compressor includes: a shell forming an outer portion thereof and having lower part in which an oil pan is formed to store oil; a motor provided in the shell; a compression unit provided in the shell to compress a working gas when being driven by the motor; a frame fixed to the shell and supporting the compression unit; a shaft supported by the frame, connecting the motor and the compression unit, provided to transmit a turning force of the motor to the compression unit, and including an oil passage; and an oil pump provided at lower part of the shaft to draw oil from the pan and supply the oil into the oil passage. The pump includes a bypass valve that is opened, when a pressure of oil flowing in the oil passage is higher than a threshold pressure, to return part of the oil to the pan.

Abstract: The straightening plate mounting structure includes: a support member including a bottom plate portion in which a first elongated hole and second elongated holes are formed; a left straightening plate which is formed in a plate shape having a convex portion engageable with the first elongated hole and adjusts an air flow in a hood; and a right straightening plate which is formed in a plate shape having convex portions engageable with the second elongated holes and adjusts the air flow in the hood.

Abstract: A motor includes a stator unit formed by coupling plural stators to one another into an annular shape. Each of the stators has: an iron core having an arc-shaped core-back portion and a tooth portion protruding from the core-back portion, the iron core forming slot portions between the iron core and adjacent ones of the stators; insulating members disposed on both end portions, in the axial direction, of the iron core; insulating films disposed so as to be in contact with inner walls of the slot portions of the iron core; and a winding disposed in the slot portions and wound over the iron core with the insulating members and the insulating films interposed therebetween. In a portion of each of the insulating films that is in contact with the inner wall of the slot portion, at least a portion that is in contact with an outer circumferential surface of the tooth tip portion has a length in the axial direction longer than the length of the iron core in the axial direction.

Abstract: A protective member includes an attachment portion that is attached to a tractor including a mid PTO shaft and a protective frame that is supported by the attachment portion and positioned not to overlap with the mid PTO shaft in a front view to protect the mid PTO shaft, and the protective frame is positioned not to overlap with the mid PTO shaft in a side view.

Abstract: A motor includes an annular core formed by stacking a plurality of electromagnetic steel sheets; end plates disposed at both ends of the core in an axial direction; a balance weight disposed on a side of one of the end plates, the side being opposite the core; and a spacer disposed between the one of the end plates and the balance weight, the spacer being configured to create a space between the one of the end plates and the balance weight. The motor is entirely fastened by allowing at least one of a plurality of rivets arranged in a circumferential direction of the core to pass through the core and the end plates in the axial direction, and allowing remaining at least one rivet to pass through the core, the end plates, the spacer, and the balance weight in the axial direction.

Abstract: Provided is an operation mechanism of a work vehicle capable of suppressing transmission of vibration from a vehicle body to a cabin. The operation mechanism of a work vehicle includes: a first link portion which is supported by the vehicle body (a center frame, a transmission, and the like); a second link portion which is supported by a cabin placed on the vehicle body; and a third link portion which has flexibility and connects the first link portion and the second link portion so as to be interlockable.

Abstract: A scroll compressor includes an orbiting scroll including an end plate and a spiral element on the end plate, a fixed scroll including an end plate and a spiral element on the end plate, and an Oldham ring including a support. The scroll compressor satisfies a relation of ?1>?2, where ?1 denotes each of the axial length of a gap between the tip of the spiral element of the orbiting scroll and the end plate of the fixed scroll and a gap between the tip of the spiral element of the fixed scroll and the end plate of the orbiting scroll, and ?2 denotes the axial length of a gap between the end plate of the orbiting scroll and the support of the Oldham ring.

Abstract: The straightening plate mounting structure includes: a support member including a bottom plate portion in which a first elongated hole and second elongated holes are formed; a left straightening plate which is formed in a plate shape having a convex portion engageable with the first elongated hole and adjusts an air flow in a hood; and a right straightening plate which is formed in a plate shape having convex portions engageable with the second elongated holes and adjusts the air flow in the hood.

Abstract: Provided is an operation mechanism of a work vehicle capable of suppressing transmission of vibration from a vehicle body to a cabin. The operation mechanism of a work vehicle includes: a first link portion which is supported by the vehicle body (a center frame, a transmission, and the like); a second link portion which is supported by a cabin placed on the vehicle body; and a third link portion which has flexibility and connects the first link portion and the second link portion so as to be interlockable.

Abstract: A magnetic pole includes a core, winding frames, and sheet-like insulators. The winding frames are provided to both ends, in a direction along the central axis, of the core, and have thin portions and projections. The thin portions and the projections extend in a direction along the central axis. The insulators are provided on both sides in the circumferential direction of a tooth portion. A part of each insulator is held by being sandwiched between the projection and the thin portion provided to each winding frame.

Abstract: An electric motor includes a stator unit, insulators, windings and insulating films. In the stator unit, a plurality of stators including respective iron cores each made of a magnetic body are arranged annularly. The insulators are provided at ends of the iron cores in an axial direction of the stator unit. The windings are wound around the insulators. The insulating films insulate the iron cores and the windings from each other. The insulating films are fixed between the iron cores and the insulators.

Abstract: It is contemplated to arrange a plurality of operational levers without inviting complications of the arrangements or enlargement of the vehicle body, intensively for better operability between the driver's seat and one of the right and left rear fenders. In a riding work vehicle, a plurality of operational levers 25, 26 are disposed adjacent on the right and left sides between a driver's seat and one of right and left rear fenders 7. Of the plurality of operational levers 25, 26, an inner operational lever 25 disposed on the side of the driver's seat is displaceable in a front-rear direction of a vehicle body.

Abstract: A rotor core is configured by stacking a plurality of core plates each including: an inner peripheral side core portion; an outer peripheral side core portion; a magnet insertion hole; a radial connection portion to be connected to the inner peripheral side core portion; a circumferential connection portion to be connected between the outer peripheral side core portion and the radial connection portion, including a minimum width portion having a width smaller than widths at both ends, and having a width smoothly decreasing from both ends toward the minimum width portion; and a thin portion including a uniform thickness portion which is provided in the circumferential connection portion and which has a uniform thickness and a non-uniform thickness portion which is adjacent to the uniform thickness portion and which has an increasing thickness, the thin portion having the minimum width portion within the uniform thickness portion.

Abstract: A rotor core in which magnets are embedded is formed by stacking a plurality of steel sheets. Each steel sheet which has a disk shape has: six magnet insertion holes formed so as to allow permanent magnets to be inserted therein as a whole; circumferential-direction bridge portions connecting, in the circumferential direction, radially-outer-side steel sheets each formed at the peripheral part of the steel sheet, between the magnet insertion holes; and radial-direction bridge portions formed between the magnet insertion holes. The circumferential-direction bridge portions and the radial-direction bridge portions have coined portions having decreased sheet thicknesses and protruding in an arc shape in the sheet-thickness direction. The coined portions having decreased sheet thicknesses suppress short-circuit of a magnetic flux between magnetic poles, and formation of the arc shapes absorbs extension of these portions caused by a coining work, to suppress deformation of the steel sheet.

Abstract: A motor includes an annular core formed by stacking a plurality of electromagnetic steel sheets; end plates disposed at both ends of the core in an axial direction; a balance weight disposed on a side of one of the end plates, the side being opposite the core; and a spacer disposed between the one of the end plates and the balance weight, the spacer being configured to create a space between the one of the end plates and the balance weight. The motor is entirely fastened by allowing at least one of a plurality of rivets arranged in a circumferential direction of the core to pass through the core and the end plates in the axial direction, and allowing remaining at least one rivet to pass through the core, the end plates, the spacer, and the balance weight in the axial direction.

Abstract: A rotor includes a rotor core which is formed by stacking steel plates and includes a first through hole in a center part, at least one second through hole in the vicinity of the first through hole and a rivet insertion hole. The rotor also includes permanent magnets which are disposed in a circumferential direction of the rotor core and are embedded in a stacking direction of the steel plates; a main shaft which is shrink-fitted or press-fitted in the first through hole of the rotor core; a pin made of an insulating material and inserted in the second through hole of the rotor core; and an upper end plate and a lower end plate which are disposed on both ends of the rotor core in the stacking direction and are fixed by a rivet inserted in the rivet insertion hole.