Dog clutch for automated transmission

A dog clutch for an automated transmission, comprising:

• a rotary shaft rotatably connecting to one of an input shaft and an output shaft of the automated transmission and provided rotatably about an axial line;
• a clutch ring rotatably supported by the rotary shaft and rotatably connecting to the other of the input shaft and the output shaft;
• a clutch hub fixed to the rotary shaft and arranged adjacent to the clutch ring;
• a sleeve slidably engaging with the clutch hub in a direction of the axial line, the sleeve including a spline, the spline including a plurality of first teeth and a plurality of second teeth, each of the first teeth including a whole depth which is greater than a whole depth of each of the second teeth;
• an axial driving device moving the sleeve in the direction of the axial line;
• and
• a dog clutch portion arranged at the clutch ring in a protruding manner toward the sleeve, the dog clutch portion selectively engaging and disengaging relative to the spline formed at the sleeve when the sleeve moves in the direction of the axial line,
• the dog clutch portion comprising:
• clutch forward teeth each outer diameter of which is greater than an inner diameter of the first tooth and which is smaller than an inner diameter of the second tooth, the clutch forward teeth the number of which is equal to the number of first teeth, each of the clutch forward teeth being formed to extend from a front end surface of the dog clutch portion to a rear end position of the dog clutch portion in a state where the clutch forward tooth is provided at a position facing the first tooth, the clutch forward tooth including a front end portion which faces the first tooth and at which an engagement portion contactable with the first tooth is formed, and inclined surfaces which are formed to extend from the engagement portion toward both sides in a circumferential direction of the clutch ring and to be inclined toward the rear end position;
• a clutch rearward tooth portion engageable with the second teeth of the spline and including clutch rearward teeth and a small-depth tooth groove, the clutch rearward tooth portion being formed to extend from a position rearward from the front end surface by a first predetermined distance to the rear end position;
• a large-depth tooth groove which is formed between the clutch forward tooth and one of the clutch rearward teeth adjacent to the clutch forward tooth and with which the first tooth is engageable;
• and
• a contact surface which is formed at a radially inward side from a bottom surface of the small-depth tooth groove and with which the first tooth is contactable.