Pressure angle

About: Pressure angle is a research topic. Over the lifetime, 1373 publications have been published within this topic receiving 10245 citations. The topic is also known as: angle of obliquity.

Asymmetric tapered roller bearing for supporting a gear wheel on a gearbox shaft

Abstract: The invention relates to a bearing assembly for a gearbox for supporting a gear wheel (1) on a gearbox shaft (2), comprising a two-row asymmetric tapered roller bearing (4) in O arrangement, which has a first row of tapered rollers (4a), which is adjacent to the shaft end (3), and a second row of tapered rollers (4b), which is adjacent to the first row of tapered rollers (4a), wherein the two rows of tapered rollers (4a, 4b) are arranged between a common outer ring (5) arranged on the gear wheel (1) and a respective inner ring (6a, 6b) arranged on the gearbox shaft (2), wherein a first acute pressure angle (7a) on the first row of tapered rollers (4a) is not equal to a second acute pressure angle (7b) on the second row of tapered rollers (4b). According to the invention, the first pressure angle (7a) is at least 3 degrees less than the second pressure angle (7b).

Rolling method and device for forming gear

Abstract: PROBLEM TO BE SOLVED: To provide a rolling method and a rolling device for forming a gear which can shorten cycle time and lengthen the life of tools. SOLUTION: In the invented rolling method for forming the gear, roller dies 2 of which outer periphery is equipped with a plurality of working teeth 3A-3C for rolling are forced into the periphery of a disk workpiece W at a specified forcing speed while being rotated synchronously with the disk workpiece W, whereby the working teeth 3A-3C of the roller dies 2 perform rolling to the periphery of the disc workpiece W so as to form a gear-shaped member. The rolling method comprises a first working step and a second working step. In the first step, intermediately rolled teeth W2 are formed by means of the roller die 2A equipped with the working teeth 3A having a pressure angle larger than that specified for the final tooth profile. In the second step, rolled teeth 3B and 3C are formed onto the rolled teeth W2 formed in the first step, by means of the roller dies 2B and 2C equipped with the working teeth 3B and 3C having the pressure angle specified for the final tooth profile. COPYRIGHT: (C)2006,JPO&NCIPI

Pre-grinding gear hob

Abstract: The utility model belongs to the technical field of machinery, and provides a pre-grinding gear hob which solves the problems of long gear grinding time and low processing efficiency of the conventional pre-grinding gear hob. The pressure angle of the pre-grinding gear hob is 20 DEG, the dedendum transitional fillet R is 0.2 modulus, a tooth curve at the addendum of the hob is an ellipse, the cross section of the tooth bottom of the addendum is the major axis of the ellipse, the distance between the center of the major axis to the end of the addendum is the minor semi-axis of the ellipse, the length of the minor semi-axis is 0.65 of that of the major semi-axis, the small pressure angle of the hob ranges from 9 DEG to 13 DEG, the whole depth of the hob is 2.7 modulus, and the height of addendum ranges from 1.25 modulus to 1.5 modulus. The pre-grinding gear hob has the advantages of short gear grinding time and high processing efficiency.

Toothed-Lobed Gear Pump

Abstract: Toothed gears and lobed gears intermesh to create large volume pockets in gear sets of a given size. The pockets are larger than the pockets that exist in current tooth or lobe pumps and provide the benefit of a pump that better handles shear sensitive liquids. Preferably, the profiles of the teeth and of the lobes are involute-shaped to provide rolling contact and a fixed pressure angle between the teeth and lobes during engagement. The toothed gears and lobe gears improve upon standard spur and helical gear designs by omitting alternate teeth on the standard toothed gears and filling in corresponding gaps on the mating standard lobed gears. Additional tooth and lobed gear rotors may be added in tandem as additional pairs of gears to the shafts and circumferentially offset to provide driving tooth engagement between at least one pair of the toothed and lobed rotors at every point around the rotational circumference of the rotors. This spur gear or helical gear configuration eliminates the need for separate driving/synchronizing gears.

Gear pump with asymmetric combined curved surface tooth form

Abstract: The invention discloses a gear pump with an asymmetric combined curved surface tooth form. The gear pump comprises a hollow pump body; a driving gear and a driven gear which are meshed mutually are arranged in the pump body; a tooth surface on one side where the driving gear and the driven gear are contacted and stressed is a working surface, and the tooth surface on the other side is a non-working surface; a pressure angle of the working surface is 20.5 to 22.8 degrees; the gear pump is characterized in that: a pressure angle of the non-working surface is 14 to 19 degrees; and the non-working surface is formed through smooth transition of an evolvent curved surface and a circular arc camber. The gear pump has large single pump output, a large overlap coefficient, small noise, low gear collapsing probability, and transmits stably, and the chamber sweeping phenomenon is avoided.