Nanjing Chervon Industry

A handheld blower vacuum (100) includes a body (110); a pipe assembly (120) having a horizontal center plane (125); and a bag assembly (130) detachably connected to the pipe assembly. The bag assembly includes a collection bag (131) and a bag connecting portion (132) disposed on the collection bag. The pipe assembly is connected to or formed with a mounting portion (122), and the mounting portion is disposed in a region below the horizontal center plane of the pipe assembly. Moreover, at least part of the bag connecting portion extends around the pipe assembly, passes over the pipe assembly, and is detachably connected to the mounting portion.

An electric motor includes: a rotor including a rotor core; a stator including a stator core, where the stator core includes a core ring and multiple stator teeth extending radially toward the inner side of the core ring; a coil winding configured to be wound around the multiple stator teeth; and fillers, each of which is disposed at least between adjacent stator teeth. The natural frequency of the stator core in which the fillers are provided increases by at least 10% compared with the natural frequency of the stator core in which the fillers are not provided. The fillers change the natural frequency of the stator core so that the frequency at which the electric motor may resonate can be avoided, thereby reducing electric motor noises.

The provided is a terminal assembly, a battery pack, and an electric power tool system. The terminal assembly includes: a plurality of terminals, where each of the terminals is configured to be electrically connected to a contact matched with the terminal; at least one of the terminals includes a first member and a second member; the first member is configured to conduct a current; the second member is configured to apply a pressure to the first member; a ratio of a thickness of the first member to a thickness of the second member is greater than or equal to 0.1 and less than or equal to 20; the first member provides a surface-to-surface contact region for the contact; and in the contact region, the first member and the contact mate with each other.

A chainsaw (100) includes a housing (10); an electric motor (30) supported by the housing (10); a chain (22) driven by the electric motor (30) to perform cutting; a guide plate (21) for supporting and guiding the chain (22); and a control circuit (40) including a controller (41) and an inverter circuit (42) having multiple switching elements (421), where the controller (41) is configured to switch the conduction states of the multiple switching elements (421) in the inverter circuit (42) to control the operation of the electric motor (30). The controller (41) outputs a braking control signal in response to a braking instruction to control the state of the inverter circuit (42) so that the speed of the chain (22) is reduced from the operating chain (22) speed to the braking chain (22) speed, where the maximum value of the operating chain (22) speed is greater than or equal to 16 m/s, and the braking chain (22) speed is less than or equal to 1 m/s.

A power tool includes a housing; a working head; an electric motor disposed in the housing and configured to drive the working head; a load detection unit configured to detect real-time load data of the power tool; and a controller electrically connected to at least the load detection unit. The controller is configured to acquire the real-time load data outputted by the load detection unit; generate an amplitude limiting parameter of a terminal voltage of the electric motor according to the real-time load data and a first load limit; and adjust the terminal voltage of the electric motor based on the amplitude limiting parameter of the terminal voltage of the electric motor.

An electric working device includes a transmission assembly. The transmission assembly includes at least a gear set that externally meshes and a transmission housing for accommodating the gear set. The transmission housing further includes a guide member (46) and a pressure relief valve (47). The pressure relief valve (47) is configured to adjust air pressure in the transmission housing. The guide member (46) extends inward from a sidewall of the transmission housing along a circumferential direction of a gear with a maximum diameter and is disposed between the largest gear (4331) and the pressure relief valve (47).

Provided is a walk-behind mower. The walk-behind mower includes a body including a traveling assembly and a cutting assembly; an operating device electrically connected to the body, wherein the operating device includes a switch box; and a grass collecting basket selectively connected to the body and configured to collect grass clippings generated by cutting, wherein the length of the grass collecting basket in the lateral direction of the walk-behind mower is the width of the grass collecting basket. The walk-behind mower further includes a mounting assembly including at least one protrusion disposed on the switch box and used for mounting an attachment, wherein the span of the mounting assembly in the lateral direction of the walk-behind mower is greater than or equal to 5 cm and less than the width of the grass collecting basket.

Provided is a power tool. The power tool includes a housing, an electric motor, a battery pack, an eccentric rotation assembly, a working head, and a circuit board. The housing includes a motor housing extending along a first direction a, a grip extending along a second direction b, and an extension portion, where the extension portion is disposed at one end of the grip facing away from the motor housing, and an included angle m between the first direction a and the second direction b is greater than or equal to 80° and less than or equal to 150°. The electric motor is disposed inside the motor housing and includes a stator, a rotor, and a motor shaft. The battery pack is detachably mounted on the extension portion to provide electrical energy for driving the electric motor to rotate. The power tool is provided with the extension portion at one end of the housing facing away from the grip, and the battery pack is detachably mounted on the extension portion so that the battery pack is disposed detachably and externally.

A battery pack includes: a housing; multiple cells disposed in the housing; and a coupling portion configured to be coupled to an electrical device to transmit electrical energy. The coupling portion includes: a terminal assembly configured to be electrically coupled to the electrical device; and a support portion supporting at least the connection between the electrical device and the battery pack, where the support portion includes a support cavity and a reinforcing member accommodated in the support cavity, and the reinforcing member is an independent prefabricated member and is made of the same material as the housing.

A walk-behind working machine includes a traveling assembly, a working assembly, and a parking module. The traveling assembly includes a traveling wheel set and a traveling motor for driving the traveling wheel set. The traveling wheel set includes axles and wheels disposed on the axles. The working assembly includes a working attachment and a working motor for driving the working attachment. The parking module is configured to apply a braking force to the axle.