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.

Kinematics of Spherical Multi-Lobe-Cams for The Design of a Pitch-Roll Wrist

Abstract: Cam-roller mechanism can be used in transmissions and robotic devices as an alternative to their bevel-gear counter-parts. Compared with gear transmissions, cam-roller mechanisms feature low friction, low backlash, and high strength. However, cam mechanisms may end up with a high pressure angle if negative action, a motion in which the cam is driven by rollers, occurs. This paper reports the design of transmissions with multi-lobe-cams (MLC), as a means to reduce the pressure angle. The kinematics problems associated to MLC, including profile generation and transmission errors, are studied. As an example, a pith-roll wrist designed with MLC is described.

Study on profile of Roots vacuum pump rotor

Abstract: By adopting the method of reducing the pressure angle, this paper carried out an improvement on the profile of traditional involute rotorIn accordance with the meshing principle,the parameterized design of rotor profile was carried out,and a comparison was made on the area utilization coefficient with the traditional involute rotorThe study made clear that there were drops to some extent on the area utilization coefficient of the improved profile of involute rotor when compared with the traditional profile of the same structure,yet its coincident degree was decreased along with the increase of pressure angleIt raised the stability of rotor transmission and in the mean time raised the bearing capacity of rotor transmissionIt prolongs the service life,and possesses certain value of application

Design of Cam Mechanism with Negative Radius Roller-Follower

Abstract: Cam mechanisms with a negative radius roller-follower allow the design of simple machines capable of exerting remarkably high forces. Furthermore, the concave-convex nature of the contact surface between the cam and the follower results in a low contact stress and the ready formation of a lubricating layer. This paper presents a simple method for the design and analysis of a cam mechanism with a negative radius roller-follower. In the proposed approach, conjugate surface theory is employed to derive a kinematic model of the cam mechanism. Analytical expressions for the pressure angle and principal curvatures of the cam profile are then derived. The validity of the proposed design methodology is demonstrated by machining a cam mechanism having a negative radius rollerfollower with a radius of 100 mm.

Telescopic wall-clamping frame

Abstract: In order to achieve an adjustment of greater than 65 millimetres and improve the installation of the product, the invention relates to an assembly formed by a frame to which the pressure angle is fixed, said pressure angle comprising two steel profiles that are joined at a minimum distance by means of welding points. The internal profile is L-shaped and the external profile is similar to the first having an end fold, this pressure angle suitably guiding, housing and securing the wall clamp by exerting pressure on same, such that the assembly is adapted to a wall of variable thickness and creates a space for positioning different insulating materials. The invention also relates to an embodiment wherein the frame and a part of the pressure angle form a single element that is joined to the second part of the pressure angle by screws, thereby supporting the wall clamp in a similar manner to the first embodiment.

Analysis of Graphical Approach for Cam Profile Determination

Abstract: A novel approach based on graphical approach of cam profile determination is put forth in this study. The objective of the study is to have a high accuracy independent platform from CAD systems and to eliminate determination parameters of planar cams like derivatives, pressure angle and curvature. A brief description of graphical method is represented. Equations and algorithms of the proposed approach for flat face and roller translating follower mechanisms are provided. Results are compared with results of the conventional analytical approach and graphical CAD systems which indicated that the approach provides precisely correct results.