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.

Bidirectional geared motor

Abstract: The invention relates to a bi-directional gear motor; a transmission gear inside the outside shell of the motor is a pair of meshed driving and driven gears, and a main shaft of the driving gear and an auxiliary shaft of the driven gear are equipped. The motor is characterized in that the transmission gear has the following standards: the pressure angle is 22.5 degrees, the central distance is 31.3mm, the modulus is 2.75 and the number of gears is 11. The motor effectively reduces the overlap coefficients of gears, automatically adjusts the radial gap of gears and the gap at the meshing line of gears, reduces the radial size, improves the working press and mechanical efficiency, and promotes the high-temperature starting performance, lowers the production cost and improves the economic benefit, through improving the general structure comprising a shaft sleeve, a sealing ring, etc.

Gear generating profile and power transmitting unit using gear generating profile

Abstract: PROBLEM TO BE SOLVED: To provide the gear generating profile which increases the contact area to a counter gear face in an engagement part and the transmission force to the counter gear face by reducing the face pressure as well as the power transmitting unit using the gear generating profile and keeps the pressure angle to the counter gear small and the transmission force over the counter gear increased from this point as well as the power transmitting unit using the gear generating profile. SOLUTION: The rack gear 24a in the negative dislocation rack 24 is generating processed by the loop shaped nodal part of the negative dislocation curve. The cylindrical pin 25a of a pin pinion 25 welds with pressure to the gear end 24b of the rack gear 24a when rotating the pin pinion 25. The gear face of the pin pinion 25 is concave, which is engaged to a counter rack gear 24a by face contact as it has the elastic deformation when engaging. The transmitting force increases while the contact area of the cylindrical pin 25a to the rack gear 24a increases while the rigidity becomes high by reducing the face pressure. COPYRIGHT: (C)2008,JPO&INPIT

Real contact ratio and tooth bending stress calculation for plastic/plastic and plastic/steel spur gears

Abstract: This paper presents an iterative method for calculating the effective contact ratio and the bending tooth stress for a pair of plastic/plastic and plastic/steel spur gears with an involute profile. In this method, the pinion and the gear are modeled, at each moment of the mesh cycle, as equivalent springs in parallel undergoing the same displacement along the line of action. This leads to the calculation of the bending stress by taking into account the number of teeth initially in contact and those which enter in contact prematurely. We also investigate the influence of certain gear parameters, such as, the number of teeth, the pressure angle, and the module on the behavior of a pair of meshed gears. In addition, the variation of the bending stress at the tooth fillet is investigated for a pair of plastic/plastic and a pair of plastic/steel spur gears, in order to determine the critical configurations for which the bending stress is maximum. In general, the results obtained from the present method also show that the stress variation in plastic/plastic gears differs markedly from that in plastic/steel gears.

Straight and inclined gear linkaged speed changing gear

Abstract: The utility model relates to a straight and inclined gear linked speed changing gear which is composed of a straight gear (1) and a worm gear (2) which are made into a whole, wherein the low width a for the tooth of the worm gear (2) is 0443 millimeters to 0668 millimeters The thickness b for the tooth top of the straight gear (1) is 076 millimeters to 085 millimeters The utility model thickens the tooth shape of the worm gear and the straight gear a lot, and thus a pressure angle in the radial direction is changed; resistance in the radial direction is small during operation, and the strength for the tooth shape of the worm gear is enlarged; when power is enlarged, a large worm gear is not needed, and the volume of a speed changing box does not need to be enlarged; axial force is more mutually balanced during working Thus, effective output to the power is improved, when noise is reduced simultaneously, the driving is more reliable without an adjusting device

Calculation and analysis of strength for elliptical bevel gear

Abstract: Based on the plane equivalent pitch curve of elliptical bevel gear,the pressure angle in the transmission is acquired with differential geometry and gear meshing theories.The force analysis in the meshing process is performed and the formulas of tangential force and normal force on the gear teeth are derived.A method to calculate elliptical bevel gear's strength in a successive way is established and the regulation of the tooth surface contacting stress and the root bending stress changing with the angle of driving gear is discussed.Then the position of the weakest tooth is determined and the influence of basic parameters including module,number of teeth and eccentricity ratio on contacting stress and bending stress is analysed.Comparing with traditional calculation for spur bevel gear,the exactness of this successive strength calculation method is verified.