A gear is provided that is capable of suppressing a decrease in strength at a weld line. The gear (40) is provided with a cylindrical boss (41) that is formed at a center portion, a rim (42) that is formed on an outer side in a radial direction of the boss concentrically with the boss and has a tooth portion (42a) at an outer circumferential portion thereof, and a web (43) that links the boss and the rim. In the web, a plurality of gate marks (43a) are formed. Furthermore, in the web, there are provided a plurality of first radial direction ribs (43b) that extend from the boss to the outer side in the radial direction along a weld line (40a) that appears between adjacent ones of the gate marks.

A worm gear for a worm gear system of a motor vehicle steering device may include a hub, a support element, and a gear rim. The support element may be a support ring that by means of an injection-molding method is injected between the gear rim and the hub. The support ring may connect in a form-fitting manner the hub and the gear rim. The gear rim and the support element may configure a multiplicity of teeth. The support element may have support webs that penetrate the gear rim such that radially outward pointing end sides of the support webs are exposed.

Plural ejector pins are made to project before a molten resin containing reinforcing fibers is injected into an inside of a cavity through pin point gates in a web forming portion in the inside of the cavity and at positions outside the pin point gates in a radial direction. The ejector pins are retracted from the inside of the cavity after a flow of the molten resin containing reinforcing fibers injected into the inside of the cavity through the pin point gates impinges on the ejector pins and is divided and before a tooth portion forming portion in the inside of the cavity is filled with the molten resin containing reinforcing fibers. Accordingly, weld lines which extend along the radial direction are formed at positions outside the ejector pins in the radial direction, and the molten resin is filled in portions formed after the ejector pins are retracted.

A method of making a worm gear. The method includes forming a gear blank having a plurality of individual lugs formed about an outer circumferential edge of said blank to facilitate a uniform flow of a material around said plurality of individual lugs. The method also includes molding said material around said plurality of individual lugs to form a ring.

A method for producing and reinforcing a composite gear includes providing a base material comprising a polymer and forming a composite gear from the base material, the composite gear having a gear body and at least one gear tooth extending from the gear body, the at least one gear tooth having a tooth face, a tooth flank, a tooth fillet, a tooth root, and a tooth tip. The method includes depositing a first metallic material to a first area of the at least one gear tooth of the composite gear, the first area including the tooth root of the at least one gear tooth and depositing a second metallic material to a second area of the at least one gear tooth of the composite gear. The first metallic material is applied in a first thickness and the second metallic material is applied in a second thickness.

The disclosure relates to an assembly comprising a component rotatable about a rotary axis for an actuating drive comprising a sensor element attached to the rotatable component. The rotatable component has a support surface from which a fixing element protrudes in parallel to the rotary axis. The sensor element includes an opening. The sensor element is arranged on the support surface in such a manner that the fixing element penetrates the opening. A surface of the sensor element adjacent to the opening has a structure. A top portion of the fixing element is in interlocking engagement with the structure so that the attached sensor element is connected to the component in a torque-resistant manner.

A method for manufacturing a worm wheel including an inner wheel element including a side plate portion and a tubular eave portion, and an outer wheel element including a wheel tooth portion on an outer circumferential surface thereof, and coupled and fixed to the inner wheel element in a manner of covering a radially outer portion of the side plate portion and the eave portion, the method includes: molding the outer wheel element by disposing a mold around a radially outer portion of the inner wheel element, and feeding the molten synthetic resin from an annular or arc-shaped injection gate toward a pocket portion that is continuous over an entire circumference of a cavity present between an inner surface of the mold and a surface of the inner wheel element and that is present on a radially inner side of the eave portion.

This gear wheel mechanism includes a rotator, a first gear wheel, a second gear wheel, and a reinforcement member. The rotator is configured to be rotatable about a rotation shaft and has an elliptical shape as viewed in an axis direction of the rotation shaft. The first gear wheel includes a first base portion including a first outer circumferential surface and a first inner circumferential surface and having a hollow cylindrical shape configured to be deformable by the rotator being inserted in the axis direction of the rotation shaft and external teeth formed in the outer circumferential surface. The second gear wheel includes a second base portion including a second outer circumferential surface and a second inner circumferential surface and having a hollow cylindrical shape disposed to cover the external teeth and internal teeth which are formed at positions facing the external teeth of the second inner circumferential surface, with which the external teeth are partially engaged in accordance with deformation of the first base portion by rotation of the rotator. The reinforcement member is disposed in contact with a region of the second outer circumferential surface corresponding to a region in which the internal teeth of the second inner circumferential surface are formed.

A method is disclosed for additively manufacturing a composite structure. The method may include discharging a composite material from a print head and moving the print head during discharging to fabricate a preform from the composite material. The method may also include densifying the preform with a densifying material, and heating the preform to pyrolize the at least one of the composite material and the densifying material.

Provided is a method for producing a gear including an intermediate product forming process of solidifying a fluid material to form a gear intermediate product, and a tooth forming process of cutting the gear intermediate product to form teeth.