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.

Frame-shaped hood on 3D camera

Abstract: The utility model discloses a frame-shaped hood on a 3D camera. The frame-shaped hood comprises a rectangular hood whose front part is open. Lens holes are arranged on a back plate and a bottom plate of the hood. A simple reflection mirror frame which forms an angle of 45 degrees with two lens holes are arranged in the hood. Semitransparent and semireflexive glass is arranged on the simple reflection mirror frame. A data display is arranged on the hood. The data display is used for displaying the optical axis and the pressure angle between two lenses. The adjustment mode of complete subjective judgment of an operator through the effect of a 3D stereo image in the traditional technology is abandoned, which makes the adjustment of the optical axis and the pressure angle accurate. When the optical axis and the pressure angle need to be adjusted to previous specific positions, adjusting the data on the data display to corresponding parameters is needed. Repeated adjustment of the operator through the subjective judgment is no longer needed, thus adjustment efficiency and accuracy are improved.

Asymmetrical hob and design method thereof

Abstract: The invention discloses an asymmetrical hob and a design method thereof. The asymmetrical hob is characterized in that the axial tooth profile of the asymmetrical hob comprises a left tooth profile and a right tooth profile, the left tooth profile comprises linear segments HI, IJ and KL and an arc-shaped segment JK, and the right tooth profile comprises linear segments PO, ON and ML and an arc-shaped segment NM. The axial tooth profile of the asymmetrical hob is designed by the steps of firstly, setting the basic parameters of a to-be-machined gear as die number m, tooth number z, pressure angle alpha n and modification coefficient x, setting the diameter of the involute starting point of the left tooth profile QSG of the to-be-machined gear as dFf1, and setting the diameter of the involute starting point of the right tooth profile UTG of the to-be-machined gear as dFf2; secondly, determining the tooth profile parameters according to the following formula, and the like. The asymmetrical hob has the advantages that the left tooth profile and the right tooth profile of the to-be-machined gear can have different involute starting point diameters and tooth root curves, machining of idle gears and planet gears participating in bidirectional meshing is facilitated, and the strength and the reliability of the idle gears and the planet gears are increased.

Gear pair consisting of a crown gear and of a pinion gear, and differential compensation transmission device

Abstract: The present invention relates to a gear pair consisting of a crown gear (1) and of a pinion gear (2) provided in the form of a spur gear with an axis crossing angle of 90 DEG . According to the invention, the teeth (3) of the pinion gear (2), in order to reduce an undercut of the teeth (5) of the crown gear (1), have a pressure angle, which increases from the outside inward in a radial direction with regard to the crown gear (1), or in the event of a constant pressure angle, have a profile offset, which decreases from the outside inward in a radial direction with regard to the crown gear (1).

Variable-axial-pressure-angle gear

Abstract: The invention provides a variable-axial-pressure-angle gear capable of effectively eliminating or reducing backlash in circular tooth and return difference. The variable-axial-pressure-angle gear is provided with an inner end surface and an outer end surface, wherein the inner end surface is meshed with other gears and opposite to the outer end surface, one or two sides of gear teeth of the variable-axial-pressure-angle gear have a pressure angle changing in the axial direction of the variable-axial-pressure-angle gear from the inner end surface to the outer end surface, and included angles with opposite tooth surface cones are formed between the tooth crest and the pitch circle and between the tooth root and the pitch circle of the same-side tooth surface of one or more sides of the gear teeth respectively. In this way, the backlash in circular tooth and return difference can be effectively eliminated or reduced by the variable-axial-pressure-angle gear, axial forces generated during meshing can offset each other, and therefore vibration and noise are reduced, bearing ability and transmission rigidity are improved, and the service life of the variable-axial-pressure-angle gear is prolonged.

Theoretical Study on Real Tooth Surface of Novel Toroidal Worm by the Forming Method

Abstract: The aim of this paper is to validate the rationality of the forming method for the worm surface in a novel toroidal worm-gearing with spherical meshing elements, which is made up of worm, steel balls and worm gear. Based on the directrix of worm surface, the mathematic model of worm surface is established and the directrix-based forming method for machining worm surface is proposed. Further, the principle error in the machining process is analyzed and the theoretic and real tooth surfaces of worm are fitted and compared on Open GL platform. The results show that the tooth profile error can be controlled at the range of 0~1×10 !5 mm and it is always 0 at the pressure angle.