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Results show that there can be four situations for meshing boundary line on the tooth surface of gear, namely, inexistence of meshing boundary line, a unique line, two lines, and two coincident lines.
      
Research on transmission principle and kinematics analysis for involute spherical gear
      
A new kind of transmission-type spherical gear called 'ring involute spherical gear mechanism' is introduced.
      
Compared to the famous TRALLFA spherical gear, this new spherical gear has an involute tooth profile, and a ring tooth that is distributed continuously on the surface of the sphere.
      
This allows the gear to overcome two disadvantages of the TRALLFA spherical gear: the drive principle error and the manufacturing difficulty.
      
To make the research more convenient, every part of the new spherical gear mechanism is named.
      
Furthermore, the paper deduces the surface formula of the conjugate teeth profiles, which proves that the conjugate teeth profiles is also one of the ringed involute spherical gear.
      
In order to analyze the relationship between two coordinate systems, which is attached respectively to the diving spherical gear and the driven spherical gear, the orientation cosine matrix method is utilized.
      
Using the method for calculating the transmission ratio of planet gear train, the relationship of the two oscillating angle between output axis and the bracket is established.
      
Based on the research, the kinematics graphic simulation of spherical gear mechanism and disk rack are made respectively.
      
When the proposed method is applied to air compressor condition classification and gear fault classification, an excellent performance in complicated multi-faults classification is presented.
      
Estimation of fatigue damage of airplane landing gear
      
The computed results show that the landing damage to the fighter and transport airplanes is 75% and 60% of the total damage, and the damage caused by the landing stroke is 40% of the landing-gear damage.
      
The gear processing in the machining tool factory was presented to verify the system's applicability.
      
The rotary motion of each side and the extensible motion of the pegs are generated by a motor connected to a reducer, using a cone-shaped gear, belt, clutch, etc.
      
The pressure in the base domain was measured by using total and static pressure detectors (1.2 mm outer diameter) mounted on a traversing gear.
      
The coupling between variation of parameters of nondestructive testing and heating of rolling bearings associated with their operation regime in a helicopter reduction gear is demonstrated.
      
This paper describes a system for visual object recognition based on mobile augmented reality gear.
      
A micro gear and grooves on pure copper piece were bio-machined.
      
Study of utilizing differential gear train to achieve hybrid mechanism of mechanical press
      
 

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