Land wheel profiling device of multifunctional no-tillage planter

The utility model discloses a multifunctional no-tillage planter land wheel profiling device which comprises a land wheel hub, a land wheel shaft in the land wheel hub is connected with a wheel rim through a wheel rim connecting disc, one end of the land wheel hub is fixedly connected with the rear portion of a first connecting disc, the rear portion of the first connecting disc is connected with a speed sensor through a second connecting disc, and the speed sensor is connected with the wheel rim. The front portion of the first connecting disc is sequentially connected with the lower portion of a land wheel fixing arm and a swing arm through a swing arm shaft, the rear end of the swing arm is fixedly connected with a land wheel hub, a limiting groove is formed in the side, close to the land wheel hub, of the lower portion of the land wheel fixing arm, and a spring supporting arm is arranged on the side, away from the limiting groove, of the upper portion of the land wheel fixing arm. And an extension spring i