Hydraulic motor with wobble-stick and brake assembly

A hydraulic device comprising:

• a housing;
• a hydraulic motor having an output shaft extending from said housing, said motor comprising a stator and a rotor having cooperating teeth defining fluid pockets, said rotor rotating and orbiting relative to said stator when hydraulic fluid is directed to said fluid pockets;
• said output shaft having a hollow end portion located in said housing;
• a wobble shaft connected to said rotor and to said hollow end portion of said output shaft to rotate said output shaft upon rotational and orbital movement of said rotor, said wobble shaft having an inner end portion connected with said hydraulic motor and an outer end portion disposed in said hollow inner end portion of said output shaft, said inner end portion of said wobble shaft being adapted for both orbital and rotational motion by said hydraulic motor, said outer end portion of said wobble shaft being adapted for rotational motion with said hollow inner end portion of said output shaft;
• a brake assembly in said housing and connected to said output shaft, said brake assembly including means urging it to an operating condition braking said output shaft;
• and
• seal means for blocking fluid flow between said brake assembly and said hydraulic motor, said sail means engaging said housing and an outer surface of said hollow end portion of said output shaft;
• said hollow end portion of said output shaft including passage means extending between the outer surface of said hollow end portion of said output shaft and an inner surface of said hollow end portion of said output shaft in a direction transverse to the axis of rotation of said output shaft to conduct hydraulic fluid flow during rotational and orbital movement of said rotor relative to said stator,
• said seal means being disposed in sealing engagement with the outer surface of said hollow end portion of said output shaft at a location disposed axially along said output shaft between said passage means and said brake assembly.

A hydraulic device comprising:

• a rotatable output shaft having a hollow inner end portion and an outer end portion;
• a brake assembly connected with said output shaft for reading rotation of said output shaft;
• a hydraulic motor;
• a drive shaft interconnecting said hydraulic motor and said output shaft, said drive shaft having an inner end portion connected with said hydraulic motor and an outer end portion disposed in said hollow inner end portion of said output shaft, said inner end portion of said drive shaft being adapted for both orbital and rotational motion by said hydraulic motor, said outer end portion of said drive shaft being adapted for rotational motion with said hollow inner end portion of said output shaft;
• seal means for blocking fluid flow between said brake assembly and said hydraulic motor, said sail means being disposed in sealing engagement with said output shaft at a location between said hydraulic motor and said brake assembly;
• a housing;
• first bearing means disposed adjacent to the outer end portion of said output shaft for at least partially supporting the outer end portion of said output shaft for rotation relative to said housing;
• and
• second bearing means disposed in engagement with the hollow inner end portion of said output shaft for at least partially supporting the hollow inner end portion of said output shaft for rotation relative to said housing, said brake assembly being connected with a portion of said output shaft disposed between said first and second bearing means, said seal means being disposed in sealing engagement with said output shaft at a location axially between said second baring mean said brake assembly.