Abstract: A ball screw nut has a pair of through holes and a first passage that allows the through holes to communicate with each other and that opens radially outward. In each of the through holes, a ball screw mechanism has a circulation member having a second passage in which a ball can move between a ball raceway and the first passage. The ball screw mechanism has a circulation path for communicating the two connection points set on the ball raceway by the first passage and each of the second passages. A driven pulley has a thin portion that defines a radial clearance between an inner periphery of the driven pulley and an outer periphery of the ball screw nut. The ball screw mechanism has a pressing lid that presses down each of the circulation members from the outer periphery of the ball screw nut and that covers the first passage.

Abstract: A ball screw nut has a pair of through holes and a first passage that allows the through holes to communicate with each other and that opens radially outward. In each of the through holes, a ball screw mechanism has a circulation member having a second passage in which a ball can move between a ball raceway and the first passage. The ball screw mechanism has a circulation path for communicating the two connection points set on the ball raceway by the first passage and each of the second passages. A driven pulley has a thin portion that defines a radial clearance between an inner periphery of the driven pulley and an outer periphery of the ball screw nut. The ball screw mechanism has a pressing lid that presses down each of the circulation members from the outer periphery of the ball screw nut and that covers the first passage.

Abstract: In a steered shaft in a steering system, when a section of a first end portion having a prescribed length shorter than a length from an end face to an outer peripheral rolling groove is defined as a first section, a section of the first end portion other than the first section and adjacent to the outer peripheral rolling groove is defined as a second section, a section, in the outer peripheral rolling groove, starting from a boundary between the second section and the outer peripheral rolling groove and having a prescribed length shorter than an axial length of a section along which the outer peripheral rolling groove extends is defined as a third section, a maximum value of a hardening depth in the second section is larger than a hardening depth in the first section.

Abstract: A ball screw in a steering system has a groove between the inner peripheral surface of a cylindrical ball nut through which a steered shaft extends and the outer peripheral surface of the steered shaft, and balls are accommodated in the groove. The balls rolling and flowing in the groove are returned from downstream to upstream via deflectors and a return passage member disposed in the ball nut. The return passage member has a first connection portion curved to connect one end of a linear portion of the return passage member to the first deflector, and a second connection portion curved to connect the other end of the linear portion to the second deflector. Each connection portion has an opening that opens in the return passage member longitudinal end face and an opening that opens in the return passage member outer periphery of toward the centerline of the ball nut.

Abstract: Provided are a low-cost ball screw device having a low-cost deflector, wherein the deflector is formable by simple machining, is easy to handle after being machined, and thus is easy to store and mount to another component. A ball screw device includes a screw shaft, a nut, rolling elements, and deflectors. Mounting holes each have a pair of circumferentially facing surfaces that face toward each other in the circumferential direction of the nut and parallel to each other. When a plane passing through the center point of an opening in one end of a second circulation path in each of the pair of deflectors and the axis of the nut is defined as a reference plane, an intersection line between an imaginary perpendicular plane perpendicular to the axis and the pair of circumferentially facing surfaces has an angle with respect to the reference plane.

Abstract: A ball screw in a steering system has a groove between the inner peripheral surface of a cylindrical ball nut through which a steered shaft extends and the outer peripheral surface of the steered shaft, and balls are accommodated in the groove. The balls rolling and flowing in the groove are returned from downstream to upstream via deflectors and a return passage member disposed in the ball nut. The return passage member has a first connection portion curved to connect one end of a linear portion of the return passage member to the first deflector, and a second connection portion curved to connect the other end of the linear portion to the second deflector. Each connection portion has an opening that opens in the return passage member longitudinal end face and an opening that opens in the return passage member outer periphery of toward the centerline of the ball nut.

Abstract: A motor grader includes a fuel tank, a vehicle body frame, a left-side mount part, a right-side mount part, a rear-side mount part and a reducing agent tank. The left-side mount part and the right-side mount part are respectively disposed on a left lateral frame and a right lateral frame while being disposed on the both sides of the fuel tank in a vehicle width direction, and fix the fuel tank to the vehicle body frame. The rear-side mount part is disposed on the left lateral frame in the vehicle width direction while being disposed rearward of the fuel tank, and fixes the fuel tank to the vehicle body frame. The reducing agent tank is disposed rearward of and adjacently to the fuel tank while being disposed on the right lateral frame side, and accumulates a reducing agent for processing an exhaust gas from an engine.

Abstract: A ripper device comprises a ripper bracket, a ripper cylinder, a frame component having a frame bracket, a pair of ripper links, a pair of tooth brackets, and a cylinder attachment bracket having a cylinder attachment axis. The frame bracket is connected in a state in which the head of the ripper cylinder is able to rotate, in the middle part near the ripper bracket. The cylinder attachment axis of the ripper cylinder is disposed coaxially with the rotational axis of the pair of ripper links and the pair of tooth brackets.

Abstract: A motor grader includes a fuel tank, a vehicle body frame, a left-side mount part, a right-side mount part, a rear-side mount part and a reducing agent tank. The left-side mount part and the right-side mount part are respectively disposed on a left lateral frame and a right lateral frame while being disposed on both sides of the fuel tank in a vehicle width direction, and fix the fuel tank to the vehicle body frame. The rear-side mount part is disposed on the left lateral frame in the vehicle width direction while being disposed rearward of the fuel tank, and fixes the fuel tank to the vehicle body frame. The reducing agent tank is disposed rearward of and adjacently to the fuel tank while being disposed on the right lateral frame side, and accumulates a reducing agent for processing an exhaust gas from an engine.

Abstract: A motor grader includes a frame, a work implement, a lifter guide, a lifter bracket and a lift cylinder. The lifter guide is joined to the frame and encloses the frame. The lifter bracket encloses the lifter guide. The lift cylinder is attached to the lifter bracket for driving the work implement. The lifter guide includes an annular portion and a first leg portion, the annular portion enclosing an outer periphery of the frame. The first leg portion is continuous to an inner periphery of the annular portion. The first leg portion protrudes from the annular portion in a side view, and the first leg portion is welded at an outer edge to the frame.

Abstract: A ripper device comprises a ripper bracket, a ripper cylinder, a frame component having a frame bracket, a pair of ripper links, a pair of tooth brackets, and a cylinder attachment bracket having a cylinder attachment axis. The frame bracket is connected in a state in which the head of the ripper cylinder is able to rotate, in the middle part near the ripper bracket. The cylinder attachment axis of the ripper cylinder is disposed coaxially with the rotational axis of the pair of ripper links and the pair of tooth brackets.

Abstract: A cone speaker that outputs audio by transmitting to a truncated cone, the movements of a voice coil driven when an audio current is transmitted through a voice coil placed inside a magnetic circuit formed in a space that surrounds a pole piece. Inside a space between the back surface of a center cap attached to a central portion of the cone and the apical surface of the pole piece that faces the center cap, a first filling material composed of a flexible porous body with a low porosity fills the periphery of the space and a second filling material composed of a flexible porous body with a higher porosity than the first filling material fills the central portion thereof.

Abstract: A surface inspection apparatus includes an irradiating unit that has a plurality of light sources that respectively emit a plurality of illumination light beams having different wavelength ranges, and irradiates an inspection surface as a surface of a body to be inspected with the illumination light beams, in a condition where the light sources are located adjacent to each other and arranged in a given order along the inspection surface, an imaging unit that images reflected light when the illumination light beams are reflected by the inspection surface, so as to obtain a plurality of items of image data corresponding to the respective wavelength ranges, and a control unit that detects a detection object on the inspection surface, based on the items of image data corresponding to the respective wavelength ranges which are obtained by the imaging unit.

Abstract: A motor grader includes a frame, a work implement, a lifter guide, a lifter bracket and a lift cylinder. The lifter guide is joined to the frame and encloses the frame. The lifter bracket encloses the lifter guide. The lift cylinder is attached to the lifter bracket for driving the work implement. The lifter guide includes an annular portion and a first leg portion, the annular portion enclosing an outer periphery of the frame. The first leg portion is continuous to an inner periphery of the annular portion. The first leg portion protrudes from the annular portion in a side view, and the first leg portion is welded at an outer edge to the frame.

Abstract: An image processing method that differentiates image data using an image processing system that includes a processing unit and a storage unit includes: acquiring image data; sequentially picking up pixels one by one at a predetermined pitch from among the pixels that constitute the image data and setting the picked up pixels as reference pixels; setting a close region around each of the reference pixels; calculating an average value of densities of the picked up pixels for each of the close regions; setting a wide region larger than the close region around each of the reference pixels; calculating an average value of densities of the picked up pixels for each of the wide regions; and calculating a difference between the density of each of the reference pixels and a corresponding one of the average values of the densities of the pixels of the wide regions.

Abstract: A cone speaker that outputs audio by transmitting to a truncated cone, the movements of a voice coil driven when an audio current is transmitted through a voice coil placed inside a magnetic circuit formed in a space that surrounds a pole piece. Inside a space between the back surface of a center cap attached to a central portion of the cone and the apical surface of the pole piece that faces the center cap, a first filling material composed of a flexible porous body with a low porosity fills the periphery of the space and a second filling material composed of a flexible porous body with a higher porosity than the first filling material fills the central portion thereof.

Abstract: An image processing method that differentiates image data using an image processing system that includes a processing unit and a storage unit includes: acquiring image data; sequentially picking up pixels one by one at a predetermined pitch from among the pixels that constitute the image data and setting the picked up pixels as reference pixels; setting a close region around each of the reference pixels; calculating an average value of densities of the picked up pixels for each of the close regions; setting a wide region larger than the close region around each of the reference pixels; calculating an average value of densities of the picked up pixels for each of the wide regions; and calculating a difference between the density of each of the reference pixels and a corresponding one of the average values of the densities of the pixels of the wide regions.

Abstract: A surface inspection apparatus includes an irradiating unit that has a plurality of light sources that respectively emit a plurality of illumination light beams having different wavelength ranges, and irradiates an inspection surface as a surface of a body to be inspected with the illumination light beams, in a condition where the light sources are located adjacent to each other and arranged in a given order along the inspection surface, an imaging unit that images reflected light when the illumination light beams are reflected by the inspection surface, so as to obtain a plurality of items of image data corresponding to the respective wavelength ranges, and a control unit that detects a detection object on the inspection surface, based on the items of image data corresponding to the respective wavelength ranges which are obtained by the imaging unit.