US 11,937,545 B2
Blade assembly for a lawn mower
Haishen Xu, Nanjing (CN); Toshinari Yamaoka, Nanjing (CN); and Jian Yang, Nanjing (CN)
Assigned to Nanjing Chervon Industry Co., Ltd., Nanjing (CN)
Filed by Nanjing Chervon Industry Co., Ltd., Nanjing (CN)
Filed on Jul. 12, 2022, as Appl. No. 17/863,038.
Application 17/863,038 is a continuation of application No. 17/825,815, filed on May 26, 2022.
Application 17/825,815 is a continuation of application No. 17/573,153, filed on Jan. 11, 2022.
Application 17/573,153 is a continuation of application No. 17/236,239, filed on Apr. 21, 2021, granted, now 11,246,260, issued on Feb. 15, 2022.
Application 17/236,239 is a continuation of application No. 17/164,479, filed on Feb. 1, 2021, granted, now 11,122,737, issued on Sep. 21, 2021.
Application 17/164,479 is a continuation of application No. PCT/CN2019/107650, filed on Sep. 25, 2019.
Claims priority of application No. 201821584956.0 (CN), filed on Sep. 27, 2018; application No. 201821889111.2 (CN), filed on Nov. 15, 2018; application No. 201910312144.3 (CN), filed on Apr. 18, 2019; application No. 201920533524.5 (CN), filed on Apr. 18, 2019; application No. 201910576318.7 (CN), filed on Jun. 28, 2019; and application No. 201921545742.7 (CN), filed on Sep. 17, 2019.
Prior Publication US 2022/0346310 A1, Nov. 3, 2022
Int. Cl. A01D 34/73 (2006.01); A01D 34/68 (2006.01); A01D 34/685 (2006.01); A01D 34/78 (2006.01); A01D 34/71 (2006.01); A01D 34/82 (2006.01); A01D 101/00 (2006.01)
CPC A01D 34/78 (2013.01) [A01D 34/6806 (2013.01); A01D 34/685 (2013.01); A01D 34/73 (2013.01); A01D 34/733 (2013.01); A01D 34/71 (2013.01); A01D 34/82 (2013.01); A01D 2101/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A lawn mower, comprising:
a blade assembly comprising a first blade and a second blade, wherein the second blade is disposed on a lower side of the first blade and a ratio of a sweep volume to a number of cutting portions of the blade assembly is about 1700 cm3;
a deck formed with an accommodation space for accommodating at least a portion of the blade assembly;
a motor configured to drive the blade assembly to rotate about a rotation axis;
a battery pack configured to provided power source for the motor, wherein the battery pack comprises a battery pack housing and battery cells provided in the battery pack housing; and
a mounting assembly configured to mount the blade assembly to the motor,
wherein when the motor drives the blade assembly to rotate around the rotation axis with no load, a working time of the lawn mower with 100 WH energy consumption of the battery pack is defined as a no-load battery life of the lawn mower, and the no-load battery life of the lawn mower is greater than or equal to 9 min,
wherein the first blade is substantially coplanar along an entire length of the first blade, the first blade comprises a first mounting portion provided with a first mounting hole for mounting the first blade about the rotation axis, and the second blade comprises a second mounting portion provided with a second mounting hole for mounting the second blade about the rotation axis, and
wherein the first blade further comprises a first cutting portion provided with a first cutting edge, the second blade further comprises a second cutting portion provided with a second cutting edge and a falling portion located along the length of the second blade so that the second mounting portion is proximate to the first mounting portion and the second cutting portion extends away from the first cutting portion, and the falling portion connects the second mounting portion and the second cutting portion, and
wherein the falling portion extends from the first blade at a location adjacent the first cutting portion.