Snow thrower

Abstract

A snow thrower includes: a snow collection device including a snow collection element for collecting snow and a first electric motor configured to drive the snow collection element to rotate; a snow throwing device including a snow throwing element for throwing out the snow collected by the snow collection device, a discharge chute guiding a snow throwing direction, and a second electric motor driving the snow throwing element to rotate; a main housing for supporting the snow collection device and the snow throwing device; a walking assembly including walking wheels driving the snow thrower to walk on the ground; and a power supply device configured to power the first electric motor and the second electric motor. A working current of the first electric motor is less than or equal to 40 A when the snow collection element works with no load. The snow thrower has relatively high work efficiency.

What is claimed is: 
     
         1 . A snow thrower, comprising:
 a snow collection device comprising a snow collection element for collecting a snow, a first electric motor configured to drive the snow collection element to rotate, and a first transmission assembly disposed between the first electric motor and the snow collection element to transmit power between the first electric motor and the snow collection element, wherein a rotational speed of the first electric motor is higher than or equal to 5000 rpm and lower than or equal to 20000 rpm and a reduction ratio of the first transmission assembly is higher than or equal to 40 and lower than or equal to 200;   a snow throwing device comprising a snow throwing element for throwing out the snow collected by the snow collection device, a discharge chute guiding the snow along a snow throwing direction, and a second electric motor driving the snow throwing element to rotate;   a main housing for supporting the snow collection device and the snow throwing device;   a walking assembly driving the snow thrower to walk on the ground; and   a power supply device configured to power the first electric motor and the second electric motor.   
     
     
         2 . The snow thrower according to  claim 1 , wherein a rotational speed of the second electric motor is higher than or equal to 5000 rpm and lower than or equal to 14000 rpm. 
     
     
         3 . The snow thrower according to  claim 2 , wherein the snow throwing device further comprises a second transmission assembly disposed between the second electric motor and the snow throwing element to transmit power between the second electric motor and the snow throwing element, and a reduction ratio of the second transmission assembly is higher than or equal to 4 and lower than or equal to 20. 
     
     
         4 . The snow thrower according to  claim 1 , wherein the first transmission assembly comprises a first gear rotating about a first axis, and a second gear meshing with the first gear and rotating about a second axis. 
     
     
         5 . The snow thrower according to  claim 4 , wherein the first axis and the second axis are parallel to each other. 
     
     
         6 . The snow thrower according to  claim 4 , wherein the second axis is oblique or perpendicular to the first axis. 
     
     
         7 . The snow thrower according to  claim 1 , wherein a diameter of the first electric motor is greater than or equal to 30 mm and less than or equal to 110 mm. 
     
     
         8 . The snow thrower according to  claim 1 , wherein a diameter of the second electric motor is greater than or equal to 60 mm and less than or equal to 135 mm. 
     
     
         9 . The snow thrower according to  claim 1 , wherein the reduction ratio of the first transmission assembly is higher than or equal to 80 and lower than or equal to 120. 
     
     
         10 . The snow thrower according to  claim 1 , wherein a working current of the first electric motor is less than or equal to 40 A when the snow collection element works with no load. 
     
     
         11 . The snow thrower according to  claim 1 , wherein a working current of the second electric motor is less than or equal to 40 A when the snow collection element works with no load. 
     
     
         12 . The snow thrower according to  claim 1 , further comprising a control device configured to adjust a rotational speed of the first electric motor in response to a variation in a load, wherein a rotational speed of the second electric motor is kept at a value of a rotational speed corresponding to a set snow throwing distance when the rotational speed of the first electric motor varies. 
     
     
         13 . The snow thrower according to  claim 1 , wherein the snow collection element rotates about a rotation axis, a coordinate system using a point on the rotation axis of the snow collection element as an origin, a front and rear direction as an X-axis, and an up and down direction as a Y-axis is established, a forward direction is a positive direction of the X-axis, an upward direction is a positive direction of the Y-axis, a projection of the first electric motor on a plane where the coordinate system is located is within an angular region using the origin as a vertex and located in the plane where the coordinate system is located, a first side of the angular region is within a first quadrant of the coordinate system and an included angle between the first side of the angular region and the positive direction of the Y-axis is less than or equal to 60 degrees, and a second side of the angular region is within a second quadrant of the coordinate system and an included angle between the second side of the angular region and the positive direction of the Y-axis is less than or equal to 80 degrees. 
     
     
         14 . The snow thrower according to  claim 1 , further comprising a control device configured to control a rotational speed of the first electric motor according to at least a state of the snow and a walking speed of the walking assembly. 
     
     
         15 . The snow thrower according to  claim 1 , further comprising a control device configured to control a walking speed of the walking assembly and a rotational speed of the first electric motor according to at least a state of the snow. 
     
     
         16 . A snow thrower, comprising:
 a snow collection device comprising a snow collection element for collecting a snow and a first electric motor configured to drive the snow collection element to rotate;   a snow throwing device comprising a snow throwing element for throwing out the snow collected by the snow collection device, a discharge chute guiding the snow along a snow throwing direction, and a second electric motor driving the snow throwing element to rotate;   a main housing for supporting the snow collection device and the snow throwing device;   a walking assembly driving the snow thrower to walk on the ground; and   a power supply device configured to power the first electric motor and the second electric motor;   wherein, when the snow collection element works with no load, a ratio of a no-load output power of the second electric motor to a no-load output power of the first electric motor is higher than or equal to 0.5 and lower than or equal to 1.5.   
     
     
         17 . The snow thrower according to  claim 16 , further comprising a control device configured to adjust a ratio of load output power of the second electric motor to load output power of the first electric motor according to a load. 
     
     
         18 . A snow thrower, comprising:
 a snow collection device comprising a snow collection element for collecting a snow and a first electric motor configured to drive the snow collection element to rotate;   a snow throwing device comprising a snow throwing element for throwing out the snow collected by the snow collection device, a second electric motor driving the snow throwing element to rotate, a discharge chute for guiding the snow along a snow throwing direction, and a snow throwing cap connected to the discharge chute to guide a snow throwing height, wherein a distance between a position where the snow is guided by the snow throwing device to fall on the ground and a central axis of the discharge chute is defined as a snow throwing distance, and a maximum snow throwing distance that the snow thrower is capable of reaching is greater than or equal to 10 m and less than or equal to 21 m;   a main housing for supporting the snow collection device and the snow throwing device;   a walking assembly driving the snow thrower to walk on the ground; and   a power supply device configured to power the first electric motor and the second electric motor.   
     
     
         19 . The snow thrower according to  claim 18 , wherein, when the control device adjusts the rotational speed of the first electric motor according to a variation in the load, a rotational speed of the second electric motor is kept at a value of a rotational speed corresponding to a set snow throwing distance. 
     
     
         20 . The snow thrower according to  claim 18 , further comprising an operation member operated by a user to adjust a rotational speed of the second electric motor to adjust the snow throwing distance.