Abstract: This shock absorber is disposed between a vehicle body and an axle. The shock absorber includes a bottomed cylindrical cylinder, a spring seat, and a mold release rib. The spring seat is formed integrally with the cylinder. The spring seat protrudes in a radial direction of the cylinder from the cylinder to support a suspension spring. The mold release rib is formed integrally with the cylinder and the spring seat. The mold release rib connects an outer circumferential portion of the spring seat and the cylinder. The mold release rib has a face part provided at an outer end portion of the cylinder in the radial direction.

Abstract: This shock absorber includes an outer cylinder, and a bracket having a pair of extension parts. The outer cylinder has an opening and into which the inner cylinder is inserted and fixed. The pair of extension parts extend outward in a radial direction of the outer cylinder from different positions spaced apart in a circumferential direction of the outer cylinder. A hole portion and a reduced-rigidity part are provided in the pair of extension parts. The hole portion is provided at a position facing an attachment hole of an attachment member disposed between the pair of extension parts. The reduced-rigidity part is disposed at a disposition position on the outer cylinder side of the hole portion at the same position as the hole portion in the axial direction of the outer cylinder. The reduced-rigidity part has a lower rigidity than a position different from the disposition position.

Abstract: This shock absorber includes a piston main body and a piston band. The piston main body has, at an outer peripheral portion thereof, a stepped portion including a large-diameter surface portion, a stepped surface portion and a small-diameter surface portion. The piston band has, at an outer peripheral portion thereof, a large diameter portion, a medium diameter portion formed so as to have a smaller diameter than the large diameter portion, and a small diameter portion formed between the large diameter portion and the medium diameter portion so as to have a smaller diameter than the medium diameter portion, in a state before being disposed in a cylinder. At one end on the side close to a tip portion of a piston rod, an inner peripheral surface is inclined toward the piston main body side from the large-diameter surface portion to a small-diameter surface portion of the stepped portion.

Abstract: A master cylinder includes a piston seal installed in a circumferential groove. The piston seal includes an annular base section, an inner circumferential lip section protruding from an inner circumferential side of the base section to come in sliding contact with an outer circumferential surface of a piston, an outer circumferential lip section protruding from an outer circumferential side of the base section to abut the circumferential groove, and an intermediate protrusion section protruding from between the inner circumferential lip section and the outer circumferential lip section of the base section to a forward side of the outer circumferential lip section. A step difference section is formed at the outer circumferential side. The circumferential groove has a step section that always abuts an outer circumferential surface of the step difference section.

Abstract: A disk brake includes a mounting member (2) having a pair of arms (2A) formed to extend over the outer periphery of a disk (1), the mounting member being secured to a non-rotating part of a vehicle, a caliper (3) provided on the mounting member (2) movably in the axial direction of the disk (1), a pair of pin holes (2C) provided in the arms (2A), respectively, of the mounting member (2) to extend in the axial direction of the disk (1), a pair of sliding pins (6) provided at the opposite ends of the caliper (3) to slide in the pin holes (2C), respectively, and a pair of pads (10) movably attached to the mounting member (2) and pressed against the opposite sides, respectively, of the disk (1) by the caliper (3). At least one arm (2A) of the arms (2A) of the mounting member (2) is provided with a warning sound generating mechanism (13) generating a warning sound for wear detection according to displacement of the sliding pin (6) relative to the arm (2A) when the pads (10) have worn by a predetermined amount.

Abstract: This disc brake includes: a carrier; a caliper (13); a pressing mechanism (81); and a cable (16). A center (0) of a rotation of the caliper (13) with respect to the carrier (11) is configured so as to be arranged in an orientation direction of an elastic force (F) which the caliper (13) receives and in which the cable (16) returns to a straight shape.

Abstract: A disc brake piston includes a tubular wall section (52) having an opening section (51) at one end in an axial direction, and a bottom section (53) configured to close the other end of the wall section (52) in the axial direction. The bottom section (53) includes a first annular region (71) provided on an inner side of the wall section (52) in a radial direction to be continuous with the wall section (52); and a second region (72) provided on the inner side of the first region (71) in the radial direction and formed in a recessed shape in the axial direction. The second region (72) has a variable thickness region (103) in which a thickness in the axial direction becomes thinner toward the inner side in the radial direction.

Abstract: A shock absorber including a piston (3) slidably fitted in a cylinder having hydraulic oil sealed therein. A flow of hydraulic oil, induced in a passage (10) and a sub-passage (29) by sliding movement of the piston in the cylinder in response to the stroke of a piston rod, is controlled by an extension main valve (14) and a compression sub-valve (15) incorporated in the extension main valve, thereby generating a damping force. The amount of deflection of a sub-disk (30) constituting the compression sub-valve when the sub-disk is opened is limited by restricting portions (21). The sub-disk is provided with communicating holes (31) to reduce a differential pressure acting on the sub-disk when opened and also to relax the concentration of stress in the sub-disk, thereby improving the durability of the sub-disk.

Abstract: A disk brake includes a mounting member (2) having a pair of arms (2A) formed to extend over the outer periphery of a disk (1), the mounting member being secured to a non-rotating part of a vehicle, a caliper (3) provided on the mounting member (2) movably in the axial direction of the disk (1), a pair of pin holes (2C) provided in the arms (2A), respectively, of the mounting member (2) to extend in the axial direction of the disk (1), a pair of sliding pins (6) provided at the opposite ends of the caliper (3) to slide in the pin holes (2C), respectively and a pair of pads (10) movably attached to the mounting member (2) and pressed against the opposite sides, respectively, of the disk (1) by the caliper (3). At least one arm (2A) of the arms (2A) of the mounting member (2) is provided with a warning sound generating mechanism (13) generating a warning sound for wear detection according to displacement of the sliding pin (6) relative to the arm (2A) when the pads (10) have worn by a predetermined amount.

Abstract: A shock absorber including a piston (3) slidably fitted in a cylinder having hydraulic oil sealed therein. A flow of hydraulic oil, induced in a passage (10) and a sub-passage (29) by sliding movement of the piston in the cylinder in response to the stroke of a piston rod, is controlled by an extension main valve (14) and a compression sub-valve (15) incorporated in the extension main valve, thereby generating a damping force. The amount of deflection of a sub-disk (30) constituting the compression sub-valve when the sub-disk is opened is limited by restricting portions (21). The sub-disk is provided with communicating holes (31) to reduce a differential pressure acting on the sub-disk when opened and also to relax the concentration of stress in the sub-disk, thereby improving the durability of the sub-disk.

Abstract: A shock absorber including a damping force generation mechanism (30a) includes a spring member (106a) having radially extending spring portions (117) having high spring constants and circumferentially extending spring portions (118) having low spring constants. The radially extending spring portions and the circumferentially extending spring portions are integrally configured so that biasing forces thereof act dynamically linearly. An annular stepped portion limits strokes of the circumferentially extending spring portions and is provided on a cylindrical wall portion of a pilot body. As a result, within a range of damping force control, only the radially extending spring portions of the spring member are elastically deformed, whereby the durability of the spring member is enhanced, and only biasing forces of the radially extending spring portions of the spring member act on a pilot valve member, and thereby variation in a damping force is reduced so that the performance is improved.

Abstract: A master cylinder includes a piston seal (45) installed in a circumferential groove (32). The piston seal (45) includes an annular base section (101), an inner circumferential lip section (102) protruding from an inner circumferential side of the base section (101) to come in sliding contact with an outer circumferential surface (18a) of a piston (18), an outer circumferential lip section (103) protruding from an outer circumferential side of the base section (101) to abut the circumferential groove (32), and an intermediate protrusion section (104) protruding from between the inner circumferential lip section (102) and the outer circumferential lip section (103) of the base section (101) to a forward side of the outer circumferential lip section (103). A step difference section (107) that is long in the axial direction at the inner circumferential side is formed at the outer circumferential side of the base section (101).

Abstract: The present invention provides a shock absorber having improved performance and durability. A damping force generation mechanism 30a includes a spring member 106a. The spring member 106a includes radially extending spring portions 117 having high spring constants and circumferentially extending spring portions 118 having low spring constants. The respective radially extending spring portions 117 and the respective circumferentially extending spring portions 118 are integrally configured so that respective biasing forces thereof act dynamically linearly. Further, an annular stepped portion 74, which limits strokes of the respective circumferentially extending spring portions 118, is provided on an opposite end side cylindrical wall portion 71 of a pilot body 49.