Patent ID: 11946510
Assignee: MUHR UND BENDER KG
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  H | IPC F

Claim 0:
1. A shaft assembly, comprising:
a hollow shaft with an axis of rotation; and
a hub body which is connected to the hollow shaft in a force locking manner;
wherein the hollow shaft, viewed in cross-section, includes a circumferentially closed wall with a plurality of circumferentially distributed support portions that are in abutting contact with the hub body, and with spring portions spaced from an inner circumferential face of the hub body;
wherein inner surface regions of the spring portions lie on a smaller radius around the axis of rotation than inner surface regions of the support portions; and
wherein the hollow shaft is configured so as to have a radial spring travel for which the following applies:, s
    ⁢
    3
  
  =
  
    
      (
      
        
          R
          ⁢
          3
          ⁢
          max
        
        -
        
          R
          ⁢
          3
          ⁢
          min
        
      
      )
    
    >
    
      
        
          
            R
            
              
                p
                ⁢
                0
              
              ,
              2
            
          
          *
          A
        
        
          E
          *
          π
          *
          
            D
            
              3
              ⁢
              a
            
          
        
      
      *
      
        (
        
          1
          -
          
            
              π
              *
              
                D
                
                  3
                  ⁢
                  a
                
                2
              
            
            
              2
              *
              A
            
          
          -
          μ
        
        )
      
    
  

wherein:
s3 is the radial spring travel,
R3max is a maximum radius of the shaft in an unmounted condition,
R3min is a maximum radius of the shaft in a maximum radial-elastic deflected state,
D3a is twice a maximum radius of the shaft in the unmounted condition,
E is a modulus of elasticity of the shaft,
A is a cross-sectional area of the shaft,
μ is a transverse contraction coefficient of the shaft, and
Rp0,2 is a yield strength of the shaft material.