A cone clutch , comprising: a middle cone ring having an inner ring surface and an outer ring surface, each of the inner ring surface and the outer ring surface being a conical surface; an inner cone ring disposed on an inner side of the middle cone ring and having an outer ring surface, the outer ring surface of the inner cone ring being a conical surface matching with the inner ring surface of the middle cone ring ; and an outer ring having a conical ring surface matching with the outer ring surface of the middle cone ring , wherein: the outer ring is movable relative to the inner cone ring in an axial direction of the conical ring surface; the middle cone ring and the outer ring are connected to two to-be-engaged members, respectively; and the cone clutch is configured to engage the two to-be-engaged members by forming friction pairs in close contact between the outer ring and the middle cone ring and between the middle cone ring and the inner cone ring when the outer ring is subject to a thrust for urging the outer ring towards the middle cone ring , characterised in that the cone clutch further comprises a reset spring , an end of the reset spring being fixed, and another end of the reset spring being connected to the outer ring . a middle cone ring having an inner ring surface and an outer ring surface, each of the inner ring surface and the outer ring surface being a conical surface; an inner cone ring disposed on an inner side of the middle cone ring and having an outer ring surface, the outer ring surface of the inner cone ring being a conical surface matching with the inner ring surface of the middle cone ring ; and an outer ring having a conical ring surface matching with the outer ring surface of the middle cone ring , wherein: the outer ring is movable relative to the inner cone ring in an axial direction of the conical ring surface; the middle cone ring and the outer ring are connected to two to-be-engaged members, respectively; and the cone clutch is configured to engage the two to-be-engaged members by forming friction pairs in close contact between the outer ring and the middle cone ring and between the middle cone ring and the inner cone ring when the outer ring is subject to a thrust for urging the outer ring towards the middle cone ring , characterised in that the cone clutch further comprises a reset spring , an end of the reset spring being fixed, and another end of the reset spring being connected to the outer ring . the outer ring is movable relative to the inner cone ring in an axial direction of the conical ring surface; the middle cone ring and the outer ring are connected to two to-be-engaged members, respectively; and the cone clutch is configured to engage the two to-be-engaged members by forming friction pairs in close contact between the outer ring and the middle cone ring and between the middle cone ring and the inner cone ring when the outer ring is subject to a thrust for urging the outer ring towards the middle cone ring , characterised in that the cone clutch further comprises a reset spring , an end of the reset spring being fixed, and another end of the reset spring being connected to the outer ring . <EOS>