Fan

Abstract

A fan includes a battery pack coupling portion and an air output assembly including fan blades, a front housing, and a rear housing, where the fan blades are driven by a motor to rotate about a first axis. The fan further includes a pivot assembly connected to the air output assembly, where the air output assembly is rotatable about a second axis of the pivot assembly. The fan further includes a support assembly connected to the pivot assembly for supporting the air output assembly. The maximum distance of the front housing available for air output in an up and down direction is defined as the air output diameter of the fan, and the distance between the first axis and the second axis is defined as a first distance, where the ratio of the first distance to the air output diameter is greater than or equal to 25%.

What is claimed is: 
     
         1 . A fan, comprising:
 a battery pack coupling portion for mounting a battery pack;   an air output assembly comprising fan blades, a front housing located on a front side of the fan blades, and a rear housing located on a rear side of the fan blades, wherein the fan blades are driven by a motor to rotate about a first axis, an airflow flows out from the front housing, and the airflow flows in from the rear housing;   a pivot assembly connected to the air output assembly, wherein the air output assembly is rotatable about a second axis of the pivot assembly; and   a support assembly connected to the pivot assembly, wherein the support assembly is capable of supporting the air output assembly;   wherein a maximum distance of the front housing available for air output in an up and down direction is defined as an air output diameter of the fan, a distance between the first axis and the second axis is defined as a first distance, and a ratio of the first distance to the air output diameter is greater than or equal to 25%.   
     
     
         2 . The fan of  claim 1 , wherein the ratio of the first distance to the air output diameter is greater than or equal to 33%. 
     
     
         3 . The fan of  claim 1 , wherein the pivot assembly is connected to a bottom of the air output assembly, and the second axis is located on a lower side of the air output assembly. 
     
     
         4 . The fan of  claim 1 , wherein the pivot assembly is at least partially located between the air output assembly and the battery pack coupling portion. 
     
     
         5 . The fan of  claim 1 , wherein the support assembly comprises a support rod and a support member, the support rod is connected to the pivot assembly, and the support member supports the support rod so that the fan is capable of being placed on a placement plane. 
     
     
         6 . The fan of  claim 5 , wherein the support assembly comprises four support members and, when the fan is placed on the placement plane, a projection of a center of gravity of the fan on the placement plane falls within a region enclosed by the four support members. 
     
     
         7 . The fan of  claim 1 , wherein a maximum width of the air output assembly in a left and right direction is defined as a second distance, a maximum distance of the support assembly in the left and right direction is defined as a third distance, and the second distance is greater than the third distance. 
     
     
         8 . The fan of  claim 1 , wherein a rated voltage of the battery pack is greater than or equal to 36 V and less than or equal to 56 V. 
     
     
         9 . The fan of  claim 1 , wherein a weight of the battery pack is greater than or equal to 0.8 kg and less than or equal to 2.5 kg. 
     
     
         10 . The fan of  claim 9 , wherein the battery pack adapted to the fan is also adaptable to other types of power tools other than the fan. 
     
     
         11 . The fan of  claim 1 , wherein the battery pack is capable of being mounted into the battery pack coupling portion from front to back. 
     
     
         12 . The fan of  claim 1 , wherein the battery pack is at least partially located on a front side of the second axis when the battery pack is mounted in the fan.