Abstract: A cam self-adaptive automatic speed shift hub comprises a left hub frame (7), a right hub frame (18), a case body (4), a power input device, a drive shaft (1), a wheel (14) and a brake device (20). The hub further includes a low-gear drive shaft (12), a low-gear transmission mechanism positioned on the low-gear drive shaft (12), and a cone-disc clutch cam self-adaptive speed shift assembly positioned on the drive shaft (1), in which the low-gear drive shaft (12) positioned in the case body (4) is in rotation fit with the case body (4) and in parallel with the drive shaft (1). Such a cam self-adaptive automatic speed shift hub can allow the motor/engine output power and vehicle running condition always in an optimal matching state, to achieve balance control between the vehicle driving torque and the comprehensive driving resistance.

Abstract: A cam self-adaptive automatic speed shift hub comprises a left hub frame (7), a right hub frame (18), a case body (4), a power input device, a drive shaft (1), a wheel (14) and a brake device (20). The hub further includes a low-gear drive shaft (12), a low-gear transmission mechanism positioned on the low-gear drive shaft (12), and a cone-disc clutch cam self-adaptive speed shift assembly positioned on the drive shaft (1), in which the low-gear drive shaft (12) positioned in the case body (4) is in rotation fit with the case body (4) and in parallel with the drive shaft (1). Such a cam self-adaptive automatic speed shift hub can allow the motor/engine output power and vehicle running condition always in an optimal matching state, to achieve balance control between the vehicle driving torque and the comprehensive driving resistance.