Abstract: A pulley member, particularly for an electromagnetically controlled friction clutch in an accessory drive assembly. The pulley member has two mating metal cup members bonded together with a central hub member. Through-hole slots or openings are provided in each of the cup members to provide a break in magnetic flux. A non-magnetic insert member is positioned between the cup members covering the through-holes and sealing them from contamination from environmental factors. The pulley member can be used with vehicle engine accessories such as water pumps and cooling fans.

Abstract: A V-pulley manufacturing process, including the following steps: forming a pulley: integrally forming a cylindrical pulley blank; machining V-belt grooves: cutting the external surface of the pulley blank to form a plurality of V-belt grooves matching a V belt; fine machining: cutting the external surface of the pulley blank and the side surfaces of the belt grooves, and cutting off a machining allowance; and shot blasting: placing the pulley in a shot blasting machine to form a rough shot blasting layer on the side surfaces of the V-belt grooves. The pulley manufactured through the above process has a high friction coefficient of the side surfaces of the belt grooves, and therefore has advantages of preventing slippage and having high transmission efficiency.

Abstract: A compressor pulley having a partially cold forged base of improved strength and a bridge of improved strength is easily manufactured. Metal is heated to a predetermined temp and then hot forged into a pulley shape. A piercing step then forms a through hold in a center portion of the pulley. The heated pulley is then cooled to room temperature. Then the pulley is rough guided. A partial cold-forging step forges the base at room temperature. A slot is then pierced in the base portion. During a finishing step, groove working and grinding are performed on a surface of the pulley.

Abstract: A sheet metal-made cup-shaped material including a circular base plate portion and a cylindrical portion extends from an outer peripheral edge portion of the base plate portion in one direction along the axis of the base plate portion. An annular groove is formed in an upper end portion of the cylindrical portion, whereby an annular projection that projects in a direction opposite to a direction along which the cylindrical portion extends is formed in the cylindrical portion. The annular projection and the cylindrical portion are clampingly pressed to a degree at which the annular groove at least disappears, whereby the outer circumferential face of the projection and the outer circumferential face of the cylindrical portion are flush with each other. Therefore, the axial length of a sheet metal-made back face pulley is increased, and the whole of the increased axial length can be used as the effective length.

Abstract: A compressor pulley having a partially cold forged base of improved strength and a bridge of improved strength is easily manufactured. Metal is heated to a predetermined temp and then hot forged into a pulley shape. A piercing step then forms a through hold in a center portion of the pulley. The heated pulley is then cooled to room temperature. Then the pulley is rough guided. A partial cold-forging step forges the base at room temperature. A slot is then pierced in the base portion. During a finishing step, groove working and grinding are performed on a surface of the pulley.

Abstract: The present application discloses a brake actuator for applying tension to a brake cable. The actuator includes: a mounting bracket; a brake actuator lever mounted for pivotal movement relative to the mounting bracket in brake applying and brake releasing directions; and a cam-and-drum member mounted for rotation relative to relative to the brake actuator lever. The cam-and-drum member is formed as one integral part including a protruding drum portion and a cam portion integral with the drum portion. The present application also discloses a brake actuator with a one-piece cam member.

Abstract: The invention comprises a crankshaft damper having an integral pulse ring. The crankshaft damper comprises an inner hub and outer pulley with an elastomeric connecting member between each. The elastomeric ring dampens a crankshaft vibration. The integral pulse ring is manufactured as part of the inner hub by flow forming a sheet metal blank.

Abstract: The present invention relates to a disc-shaped material made from metal sheet, provided for the manufacture of a pulley or the like. According to the present invention, even if the metal sheet is thin and light weight, a peripheral wall of sufficient strength can be formed, by the following steps: rotating the material held between a pair of dies and pressing an outer periphery of the material by means of a forming roller, in a radially inward direction, thereby thickening axially the outer periphery of the material to be extended to both sides of a non-processed portion, thus forming the peripheral wall.

Abstract: The present invention relates to a cylindrical poly-V pulley made of metal sheet suitable for forcedly fitting a one-way clutch or a bearing. The present invention can easily provide thick ears for preventing a V-belt from disengaging, and ensure an enough length of an axial straight line of a bore of a peripheral wall. Ears (2, 2) for preventing the V-belt from disengaging, are protrusively shaped in an annular state on axially both ends on an outer surface of a cylindrical peripheral wall (1). The each ear (2) includes an inner ear portion (2a) outwardly protruded from the both ends of the peripheral wall (1) and an outer ear portion (2b) folded back from the protruded outer end of the inner ear portion (2a) to the outer surface of the inner ear portion (2a) so as to be closely overlapped with each other, and the inner end surface of the ear (2) is flush with the inner surface of the peripheral wall (1).

Abstract: A pulley is made by fixing an edge of an opening of a plate by using a first upper mandrel ring installed at a lower end of a first supporting pin of a first forming device. A supporting block is disposed around an upper end of a first spindle and is rotated with the first spindle. An inner nub is formed by inwardly pressing an upper surface of the plate against a first pressing roller to reduce the thickness of the plate while drawing the plate around a first upper mandrel ring. The plate is fixed to a second spindle of a second forming device, so the plate rotates with the second spindle. An outer hub is formed by pressing a convex bead toward the inner hub by using a fourth pressing roller and by drawing the outer hub.

Abstract: The present invention relates to a cylindrical poly-V pulley made of metal sheet suitable for forcedly fitting a one-way clutch or a bearing. The present invention can easily provide thick ears for preventing a V-belt from disengaging, and ensure an enough length of an axial straight line of a bore of a peripheral wall. Ears for preventing the V-belt from disengaging, are protrusively shaped in an annular state on axially both ends on an outer surface of a cylindrical peripheral wall. Each ear includes an inner ear portion outwardly protruded from both ends of the peripheral wall and an outer ear portion folded back from the protruded outer end of the inner ear portion to the outer surface of the inner ear portion so as to be closely overlapped with each other, and the inner end surface of the ear is flush with the inner surface of the peripheral wall.

Abstract: A sintered, flanged cam pulley includes a sintered cam pulley body and an annular flange caulked to the sintered cam pulley body. The sintered cam pulley body has at an end portion thereof an axial annular projection and a stepped portion formed on an outer periphery side of the annular projection. An inner peripheral surface of the annular flange is fitted on the stepped portion of the sintered cam pulley body. The tip of the annular projection is deformed plastically from the inner to the outer periphery side of the annular projection by a caulking roller. The caulking roller has a first conical surface of a large angle and a second conical surface of a small angle contiguous to the first conical surface, the first and second conical surfaces being formed on an outer peripheral surface of the caulking roller. The annular flange is thereby caulked to the sintered cam pulley body.

Abstract: V-belt pulley comprising an outer rim (2) provided with at least one V-belt groove (7) formed by turning, said groove (7) having a bottom (9) provided with a plurality of radially through-going and circumferentially interspaced openings (8). The pulley is cast with a rim (2) having a radially inwardly facing surface (4) is provided with a plurality of circumferentially interspaced recesses (5) of such a radial depth that the radially through-going openings are formed by the turning thereof.

Abstract: An annular groove portion is formed between portions corresponding to groove portions and thereafter the groove portions are formed while the annular groove is pressed. Consequently, since the stress produced due to a plastic deformation in forming the groove portions can be absorbed by the annular groove having a smaller rigidity than the groove portions, no undesirable plastic deformation of the groove portions occurs and hence the accuracy of the finished size of the multi-stage pulley can be improved. Furthermore, the capital investment in groove forming rollers can be reduced and the manufacturing cost of the multi-stage pulley can be reduced.

Abstract: The invention relates to a method for the manufacture of a gear part with a transversely directed profile, particularly a timing belt pulley, wherein a substantially rotationally symmetrical workpiece is fixed in a flow-forming device and rotated and wherein at least one profiled flow-forming tool is infed to a circumferential area of the workpiece such that a transversely directed profile is formed. According to the invention, prior to the forming of the transversely directed profile, the circumferential area of the workpiece is provided with at least one circumferentially directed groove and the transversely directed profile is formed axially on either side of the at least one groove. The invention also relates to a gear part, particularly a timing belt pulley, which has a substantially rotationally symmetrical construction and a circumferential area and which is provided with a transversely directed profile.

Abstract: The present invention provides a method of manufacturing a poly-V pulley made of metal sheet, which can be easily produced from a thick flat-plate material. By this method, the poly-V pulley is formed to have a two-part arrangement of poly-V grooves having different diameters, i e., a small diameter and a large diameter. A circular flat-plate material having a boss portion at the center thereof is bent, thereby forming a first forming body whose section is dish-shaped. The first forming body includes a supporting base and a conical peripheral portion consecutively disposed so as to be inclined and widened from the outer peripheral end of the supporting base portion in the outward direction. Next, the conical peripheral wall is extended in the widening end direction so as to decrease the thickness thereof, thereby forming a second forming body whose section is also deep dish-shaped.

Abstract: The manufacturing cost of a multi-stage pulley is reduced without coaxially arranging a plurality of groove forming sections. While a portion between groove sections 103 is being pushed by a pushing roller 204, the groove sections 103 are successively formed. While a portion of workpiece W2 pushed by a groove forming roller 206 to form one groove section 103a and a portion of workpiece W2 pushed by a groove forming roller 207 to form the other groove section 103b are being shifted from each other in the circumferential direction, one groove section (103a) and the other groove section (103b) are simultaneously formed. Due to the foregoing, when the groove sections 103 are formed, it is possible to prevent the deformation of the groove section 103 and the groove section 103 which is adjacent to it. Accordingly, it is possible to enhance the yield of the multi-stage pulley 100 without coaxially arranging a plurality of groove forming sections.