Abstract: A wheel hub includes a support ring (1). The support ring(1) includes an integrally formed inner wheel rim (11), a large span dual bearing support frame (12), and a rotor protection frame support groove (13). A lateral end of the support ring (1) is detachably provided with a tire quick replacing ring (2). The inner wheel rim (11) is provided with a first tire sealing face (101). The tire quick replacing ring (2) is provided with a second tire sealing face (201). A wheel hub motor wheel uses the above mentioned wheel hub. An electric vehicle uses the wheel hub motor wheel. Through the above wheel hub motor wheel and the electric vehicle, rapid replacement of a tire or rapid removal of the tire from the wheel hub for maintenance can be implemented without removing the wheel hub of the wheel from a vehicle body; this allows the replacement or maintenance of the tire to be time-saving, effort-saving, and greatly convenient.

Abstract: A flexible support shaft (10) configured to be arranged on a first object to flexibly support a second object moving relative to the first object is provided. The flexible support shaft comprises a first connecting flange (20) for being mounted on the first object, a compression spring (30) having one end arranged on the first connecting flange, an elastic member (40) configured to be embedded by the compression spring to change the elasticity of the compression spring, and a second connecting flange (50) arranged on the other end of the compression spring to support the second object. Because of the design of the compression spring and the elastic member thereon, the flexible support shaft acts not only as a support but also as a shock absorber for the second object in relative motion. Furthermore, since the compression spring is embedded in the elastic member, the elastic member changes the elasticity and rigidity of the compression spring.

Abstract: A wheel hub includes a support ring (1). The support ring(1) includes an integrally formed inner wheel rim (11), a large span dual bearing support frame (12), and a rotor protection frame support groove (13). A lateral end of the support ring (1) is detachably provided with a tire quick replacing ring (2). The inner wheel rim (11) is provided with a first tire sealing face (101). The tire quick replacing ring (2) is provided with a second tire sealing face (201). A wheel hub motor wheel uses the above mentioned wheel hub. An electric vehicle uses the wheel hub motor wheel. Through the above wheel hub motor wheel and the electric vehicle, rapid replacement of a tire or rapid removal of the tire from the wheel hub for maintenance can be implemented without removing the wheel hub of the wheel from a vehicle body; this allows the replacement or maintenance of the tire to be time-saving, effort-saving, and greatly convenient.

Abstract: A flexible support shaft (10) configured to be arranged on a first object to flexibly support a second object moving relative to the first object is provided. The flexible support shaft comprises a first connecting flange (20) for being mounted on the first object, a compression spring (30) having one end arranged on the first connecting flange, an elastic member (40) configured to be embedded by the compression spring to change the elasticity of the compression spring, and a second connecting flange (50) arranged on the other end of the compression spring to support the second object. Because of the design of the compression spring and the elastic member thereon, the flexible support shaft acts not only as a support but also as a shock absorber for the second object in relative motion. Furthermore, since the compression spring is embedded in the elastic member, the elastic member changes the elasticity and rigidity of the compression spring.