Balance elbow connecting device and tracked vehicle

The invention relates to a balance elbow connecting device which is used for connecting a vehicle body (1) and a wheel assembly (2) and comprises a rotating shaft (3); the balance elbow (4) is provided with a first end (41) connected with the rotating shaft (3) and a second end (42) used for being connected with the wheel assembly (2), the first end (41) is provided with a first hollow structure (410), and the first hollow structure (410) is arranged on the periphery of the rotating shaft (3) in a sleeving mode; the flange sleeve (5) is used for being connected with the vehicle body (1) and is provided with a second hollow structure (510), and the second hollow structure (510) is arranged on the periphery of the first end (41) of the balance elbow (4) in a sleeving mode; and the plurality of rolling bodies (6) are arranged between the flange sleeve (5) and the first end (41) of the balance elbow (4), are arranged along the circumferential direction of the rotating shaft (3), and are configured to limit the mo