The invention relates to a steering gear (11) for a vehicle having a helical gear (19), the helical gear (19) having a first gear wheel (21) and a second gear wheel (22) which engages with the first gear wheel (21), a first rotation axis (23) of the first gear wheel (21) being aligned so as to be transverse to a second rotation axis (24) of the second gear wheel (22), and an axis perpendicular (25) being aligned so as to be orthogonal to the first rotation axis (23) and to the second rotation axis (24), a smallest spacing between axes (26) between the first rotation axis (23) and the second rotation axis (24) coinciding with the axis perpendicular (25), and an engagement line (33) resulting by means of common contact points (34) of the two mutually engaged gear wheels (21, 22). In order to increase the diversity in terms of variants and/or to improve the adaptation possibilities, the steering gear (11) is characterized in that the engagement line (33) is spaced apart from the axis perpendicular (25).

The invention relates to a steering gear (11) for a vehicle having a helical gear (19), the helical gear (19) having a first gear wheel (21) and a second gear wheel (22) which engages with the first gear wheel (21), a first rotation axis (23) of the first gear wheel (21) being aligned so as to be transverse to a second rotation axis (24) of the second gear wheel (22), and an axis perpendicular (25) being aligned so as to be orthogonal to the first rotation axis (23) and to the second rotation axis (24), a smallest spacing between axes (26) between the first rotation axis (23) and the second rotation axis (24) coinciding with the axis perpendicular (25), and an engagement line (33) resulting by means of common contact points (34) of the two mutually engaged gear wheels (21, 22). In order to increase the diversity in terms of variants and/or to improve the adaptation possibilities, the steering gear (11) is characterized in that the engagement line (33) is spaced apart from the axis perpendicular (25).

An intersecting-axes gear type mechanism includes two gears configured to rotate in mesh with each other. Respective axes of rotation of the two gears being disposed in an intersecting-axes manner, and at least one of the gears has teeth each of which includes a tooth trace extending substantially in a radial direction and a radially inner end face. A chamfered portion is formed on a meeting portion where the radially inner end face and a tooth face of the each of the teeth meet, so as to extend over an overall length of the meeting portion. At least an entirety of an area where the chamfered portion and the radially inner end face meet and an entirety of an area where the chamfered portion and the tooth face meet are each composed of a curved surface in overall length.

An intersecting-axes gear type mechanism includes two gears configured to rotate in mesh with each other. Respective axes of rotation of the two gears being disposed in an intersecting-axes manner, and at least one of the gears has teeth each of which includes a tooth trace extending substantially in a radial direction and a radially inner end face. A chamfered portion is formed on a meeting portion where the radially inner end face and a tooth face of the each of the teeth meet, so as to extend over an overall length of the meeting portion. At least an entirety of an area where the chamfered portion and the radially inner end face meet and an entirety of an area where the chamfered portion and the tooth face meet are each composed of a curved surface in overall length.

A gearbox includes: the first helical gear; the second helical gear to engage with the first helical gear; a casing including a first member disposed in proximity to the first helical gear and a second member disposed in proximity to the second helical gear; a screw for fastening the first member with the second member, and disposed closer to the first helical gear than an engagement position between the first helical gear and the second helical gear and penetrating at least the second member; and a clip disposed closer to the second helical gear than the engagement position, and formed of a closed curve in such a manner that the first member end and the second member end are enclosed therein.

A gearbox includes: the first helical gear; the second helical gear to engage with the first helical gear; a casing including a first member disposed in proximity to the first helical gear and a second member disposed in proximity to the second helical gear; a screw for fastening the first member with the second member, and disposed closer to the first helical gear than an engagement position between the first helical gear and the second helical gear and penetrating at least the second member; and a clip disposed closer to the second helical gear than the engagement position, and formed of a closed curve in such a manner that the first member end and the second member end are enclosed therein.

A gear reduction mechanism (1) includes a drive gear (10) having a rotation axis (L.sub.1), and a driven gear (20) driven in mesh with the drive gear (10) and having a rotation axis (L.sub.2) that is noncoplanar with the rotation axis (L.sub.1). The drive gear (10) is provided with spiral teeth, each having a tooth trace of a spiral curve having a spiral center on the rotation axis (L.sub.1) and a constant radial pitch, when viewed in the direction of the rotation axis (L.sub.1). Furthermore, the tooth profile of the driven gear (20) is set, considering a tangent angle that changes momentarily as the drive gear (10) rotates.

A bevel gear set and a method of manufacturing the same are provided. The bevel gear set may include a first bevel gear and a second bevel gear. The first and second bevel gears may be spiral bevel gears or hypoid spiral bevel gears. The first and second bevel gears may each have a gear tooth surface having a plurality of teeth formed thereon, such that the teeth of the first bevel gear and the teeth of the second bevel gear are configured to engage in a meshing engagement. The teeth are machined onto the respective gear tooth surface via a face milling process. Each tooth includes a tooth top, a plurality of meshing surfaces, and at least one chamfer. The chamfer may be formed at an abutment edge disposed between the tooth top and a respective meshing surface via a brushing process directly following the machining of the teeth.

A bevel gear set and a method of manufacturing the same are provided. The bevel gear set may include a first bevel gear and a second bevel gear. The first and second bevel gears may be spiral bevel gears or hypoid spiral bevel gears. The first and second bevel gears may each have a gear tooth surface having a plurality of teeth formed thereon, such that the teeth of the first bevel gear and the teeth of the second bevel gear are configured to engage in a meshing engagement. The teeth are machined onto the respective gear tooth surface via a face milling process. Each tooth includes a tooth top, a plurality of meshing surfaces, and at least one chamfer. The chamfer may be formed at an abutment edge disposed between the tooth top and a respective meshing surface via a brushing process directly following the machining of the teeth.

A drive transmission device, which is included in an image forming apparatus and detachably attached to an apparatus body configured to include a driven body to which a driving force is transmitted, includes a first opposing body and a second opposing body disposed facing each other and forming a gap therebetween, a gear rotatably disposed in the gap formed between the first opposing body and the second opposing body, and a rotary shaft configured to receive the driving force from a drive source and rotate in the gap. One rotational axial end of the rotary shaft being passed through the second opposing body and rotatably supported by the second opposing body in the gap.