Bogie and track-type vehicle

A bogie that travels while being guided by a guide rail provided along a track, the bogie comprising:

• a steered wheel;
• a main body that supports the steered wheel;
• a guide device that is supported so as to be rotatable with respect to the main body and turns under a reaction force from the guide rail;
• a steering mechanism that applies a steering force to the steered wheel using the reaction force that the guide device has received;
• and
• an assist mechanism that applies an assist steering force, which assists the steering force applied by the steering mechanism, to the steered wheel,
• wherein the assist mechanism includes
• a first operation arm that pivots in a steering direction of the steered wheel together with the steered wheel,
• a second operation arm that is attached so as to be rotatable around a rotation axis with respect to the main body, is coupled to the guide device, and rotates around the rotation axis according to the turning of the guide device, and
• an elastically deformable section that is coupled to the first operation arm and the second operation arm and is elastically deformable with a change in relative distance between the first operation arm and the second operation arm, and
• wherein a distance from the rotation axis to a coupling portion of the second operation arm with the guide device is longer than a distance from the rotation axis to a coupling portion of the second operation arm with the elastically deformable section.