Nanjing Chervon Industry Patente

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.

An electric power tool includes: a housing; a motor that rotates about a first axis to generate a driving force; an output shaft connected to a working attachment, where the output shaft is drivable by the motor to drive the working attachment to rotate; a shaft locking mechanism operable to lock the output shaft when the motor is stopped; and a switch assembly operable to start the motor, where when the switch assembly is operated to start the motor, an operation acting on the switch assembly can release locking of the shaft locking mechanism to the output shaft.

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A handheld cutting tool includes a housing (140); a motor (150) supported by the housing (140); a saw chain (160) driven by the motor (150) to implement a cutting function; a guide plate (170) for supporting and guiding the saw chain (160); and an oil tank (100c, 180) supported by the housing (140) and configured to store a lubricant to lubricate the saw chain (160) or the guide plate (170), where the oil tank (100c, 180) includes a tank body (181) formed with an oil injection port (182) and a cap (183) for sealing the oil injection port (182); and the tank body (181) is formed with a protrusion portion (184) capable of shielding at least part of the cap (183). According to the above technical solutions, the handheld cutting tool where the cap (183) and the oil injection port (182) mate with relatively good stability can be provided.

A walk-behind power tool includes: a body supported by a traveling assembly; a handle device, where the handle device is connected to the body and includes gripping handles for a user to hold, and at least part of the gripping handles are configured to be movable relative to the body; a sensing device configured to sense the amount of movement of the at least part of the gripping handles; and a control device connected to the sensing device. The control device is configured to control, according to the amount of movement, the walk-behind power tool to steer. The provided walk-behind power tool can be freely controlled to turn, which is flexible to operate and is safe, convenient, and comfortable to use.

Provided is a cutting tool. The cutting tool includes a bevel adjustment mechanism (140). The bevel adjustment mechanism (140) further includes an operating member (1411) connected to or formed with a limiting member (1413). Driven by the operating member (1411), the limiting member (1413) has at least a first state, a second state, and a third state. A bracket plate (142) includes a stop portion (1421) capable of being adapted to the limiting member (1413) in the first state or the second state to limit a first limit angle and a second limit angle of the sawing assembly (120) relative to the base (110). When the limiting member (1413) is in the third state, the bevel adjustment mechanism (140) limits the maximum lateral bevel angle of the sawing assembly (120) relative to the base (110) to a third limit angle. The first limit angle is less than the second limit angle.

A fastener driver includes a striking assembly including a striking member configured to strike a fastener; a drive assembly configured to drive the striking member; and an electric motor providing a driving force for at least the drive assembly. The drive assembly includes a drive wheel configured to engage with the striking member to drive the striking member to move along the extension direction of the striking member. The distance D from the centroid of the drive wheel to the rotation axis of the drive wheel is less than or equal to 1.5 mm. In this manner, the regular wobbles of the fastener driver can be reduced, thereby improving the user's operating feel.

A clamping device includes a shaft body including an axial opening and at least one hole, where the axial opening extends along a first straight line; at least one retainer, where each of the at least one retainer is configured to move within a respective hole of the at least one hole; a sleeve sleeved on the outer circumference of the shaft body and configured to move axially relative to the shaft body; an abutting member abutting against the rear side of the at least one retainer; a first elastic member located on the front side of the at least one retainer; and a second elastic member located on the rear side of the at least one retainer and being in contact with the abutting member. The sleeve includes a protrusion extending along a second straight line, and the protrusion abuts against the shaft body, where the second straight line intersects with the first straight line. Along the direction of the first straight line, the protrusion is located at the front end of the at least one retainer and is not in contact with the at least one retainer.

An inflator includes a motor, a power mechanism, at least one air vent, and a main housing. The power mechanism is driven by the motor and configured to generate airflow. The air vent is connected to a flexible duct for air intake and/or air discharge to allow the airflow to flow. The main housing accommodates the motor and the power mechanism and has a battery coupling portion, where a battery pack that provides a power supply for the motor is capable of being detached from or mounted to the battery coupling portion. The main housing further has a first coupling portion configured to detachably connect an illumination device. The illumination device is capable of illuminating a working region of the inflator.

A portable circular saw for cutting metal includes a base including a lower surface side abutting against a cut material and a cutter body at least partially supported on the upper surface side of the base. The cutter body includes a circular saw blade, a fixed shield covering the outer circumferential side of the circular saw blade, and a metal chip guide tube disposed in the fixed shield, surrounding part of the outer circumferential side of the circular saw blade, and including a chip guide cavity for guiding a chip. The ratio of the outer surface area S1 of the metal chip guide tube to a surface area S2 of the metal chip guide tube covered by the fixed shield is higher than 1.

A charger includes: a housing; a charging interface configured to be electrically connected to a first battery pack; a direct current power interface configured to be electrically connected to a second battery pack; and a drive assembly accommodated in the housing and configured to supply power to the charging interface. The drive assembly is electrically connected to the charging interface and the direct current power interface and is configured to transfer electric energy from the second battery pack to the first battery pack, the maximum output power of the drive assembly is greater than or equal to 2000 W, and the first battery pack and the second battery pack are detachably connected to the charger, so as to be detached and then mounted to a power tool and supply power to the power tool.

A wheeled work vehicle includes: a walking mechanism including walking wheels and a walking motor for driving the walking wheels; a work mechanism for performing a function of the wheeled work vehicle; a power supply assembly at least configured to power the walking motor; a temperature acquisition unit at least configured to acquire an operating temperature of the walking motor; a driver circuit connected to at least the walking motor to drive the walking motor; and a controller electrically connected to the temperature acquisition unit and the driver circuit, where the controller is configured to output a target instruction to the driver circuit so as to control an input signal of the walking motor. The controller is further configured to, when a parameter of the walking motor related to the operating temperature exceeds a preset range, adjust the target instruction to gradually reduce the input of the walking motor.

Provided are a handheld power tool and a chainsaw. After the battery pack is mounted on the handheld power tool, in the case where the handheld power tool does not satisfy the balance requirement, the electric motor does not start, thereby avoiding safety risks or an impact on the working effect during operation.

A pressure washing apparatus includes a body and a spray gun connectable to the body; where the body includes a housing; a power unit located in the housing and including an electric motor for making the spray gun spray a liquid; a power supply device including at least one battery pack to power the electric motor; and a grip for a user to hold to carry and move the pressure washing apparatus. When the pressure washing apparatus is in operation, a maximum value of a product of pressure and a flow rate of the liquid sprayed from the spray gun is greater than or equal to 2000 PSI·GPM; and the volume of the body is less than or equal to 0.032 m³.

The present invention relates to a manned mower (100) including an operating mechanism (30). The operating mechanism includes a first operating lever (31, 51) and a second operating lever (32, 52). The first operating lever and the second operating lever are operable to control a first drive wheel (411R) and a second drive wheel (411L), respectively. Each of the first operating lever and the second operating lever is provided with a handle portion (311, 511). The operating mechanism further includes a display assembly (33, 53) and an operating assembly (34, 54). The display assembly (33, 53) is at least disposed on the handle portion (311) of the first operating lever (31) and is configured to display at least the operation state of the manned mower. The operating assembly (34, 54) is operated to enable a controller to receive an operation instruction and is at least disposed on the first or second operating lever.

An airflow device includes: a housing assembly; an electric motor disposed in the housing assembly; a fan assembly including at least fan blades, where the fan assembly is configured to be driven by the electric motor to generate an airflow; an air suction port configured as an airflow inlet; and an air blowing port configured as an airflow outlet. The airflow device further includes an electrostatic conduction device disposed along the circumferential direction of a fan. The electrostatic conduction device includes a first end configured to be close to one of the fan blades and a second end configured to be close to the air blowing port.

Provided is a battery pack, including: multiple cells; a cell bracket configured to support the multiple cells; and a terminal assembly electrically connected to the multiple cells and configured to be coupled to an interface of a power tool. The cell bracket is at least partially exposed to an external environment, and the thermal conductivity of the cell bracket is higher than or equal to 0.5 W/(m·K). The temperature of the battery pack can be accurately detected, the cycling efficiency of the battery pack is ensured, and the risk of explosion caused by thermal runaway of the battery can be eliminated.

A power tool includes a first electric motor including a first drive shaft rotating about a first axis; and a second electric motor including a second drive shaft rotating about a second axis; where torque of the first drive shaft and torque of the second drive shaft are output through an output shaft. The power tool includes switchable working modes, and the working modes include an adaptive mode configured such that a controller switches a running state of an electric motor assembly according to an identification result of a detector; and a first working mode configured such that the controller makes the first electric motor and the second electric motor jointly driven in response to an input instruction.

A battery pack includes a housing; a cell assembly including n cell units connected in series; a sampling circuit including n sampling terminals connected to the n cell units in one-to-one correspondence; and a processor electrically connected to the sampling circuit and used for monitoring the state of the cell assembly. The processor is configured to, when receiving a sampling instruction, sample the n sampling terminals to acquire pieces of sampling data and determine the voltages of the n cell units or the voltage of the battery pack based on the pieces of sampling data. The sampling time interval t1 between two adjacent samplings has a value range of 10µs ≤ t1 ≤ 50µs.

Provided is a power tool including an electric motor including multi-phase windings; a driver circuit electrically connected to the electric motor; a controller electrically connected to the driver circuit and configured to output control signals to the driver circuit; a detection assembly communicatively connected to the controller and configured to detect a working state of the power tool; and a battery pack interface configured to be electrically connected to a battery pack. The battery pack interface includes a terminal assembly, which includes electrode terminals and a signal terminal. The controller is configured to acquire a real-time state parameter of the battery pack through the signal terminal or the detection assembly; acquire a load parameter of the electric motor through the detection assembly; and determine a conduction band and/or an advanced angle of the multi-phase windings according to the real-time state parameter and the load parameter.

A hedge trimmer includes: a cutting assembly including a first blade and a second blade that reciprocates relative to the first blade along a first direction, where the first blade includes a cutting edge extending along a second direction; a motor configured to drive the cutting assembly; a housing assembly accommodating the motor; and a battery pack detachably coupled to the housing assembly. The hedge trimmer has the state of being placed on a side. When the hedge trimmer is in the state of being placed on the side, the included angle between the second direction and a horizontal plane is greater than or equal to 45 degrees and less than or equal to 90 degrees, and the battery pack is coupled to the housing assembly substantially along the second direction.

An electric wheeled device includes a vehicle frame; a power supply device; a traveling assembly including a first traveling wheel, a second traveling wheel, a first traveling motor and a second traveling motor; an operating assembly generating operation amounts for controlling the traveling assembly, where the operation amounts include a first operation amount used for controlling the first traveling wheel and a second operation amount used for controlling the second traveling wheel; and a traveling control device. The traveling control device obtains a first target rotational speed based on the first operation amount and obtains a second target rotational speed based on the first target rotational speed when the first operation amount is different from the second operation amount; and drives the first traveling motor based on the first target rotational speed and drives the second traveling motor based on the second target rotational speed.

A stand-on lawn mower includes: a cutting assembly including a mowing element and a chassis; a frame; a walking device supporting the frame; a housing device mounted to the frame and including at least an operation console and a front-face housing assembly; and an energy storage device including at least one battery pack. The front-face housing assembly includes: a compartment assembly provided with an accommodation space for accommodating the at least one battery pack and an opening that allows the accommodation space to be open; and a cover plate covering the opening of the compartment assembly. The cover plate has a closed state and an open state, where the opening is closed when the cover plate is in the closed state and the opening is open when the cover plate is in the open state. The stand-on lawn mower is further provided with a left support platform supporting the user to allow the user to pull out or insert the at least one battery pack from a left side and a right support platform supporting the user to allow the user to pull out or insert the at least one battery pack from a right side. The stand-on lawn mower enables the user to conveniently detach or mount the battery pack.

A charging system and a battery pack. The charging system includes: an electrical energy conversion apparatus and multiple electrical energy receiving apparatuses connected in cascade, where the charging system is configured to charge a battery pack electrically connected to an electrical energy receiving apparatus; and a communication module, where the charging system is configured to establish a communication connection and perform data interaction with an external device through the communication module. The communication module includes one or more communication submodules. A communication submodule is configured to broadcast out broadcast information carrying a data-to-be-transmitted identifier. The external device or another communication submodule is configured to, after scanning the broadcast information, actively establish a communication connection with the communication submodule broadcasting out, so as to acquire to-be-transmitted data of the communication submodule.

A battery pack includes a housing (10); cells (20) accommodated in the housing, where the cell includes electrodes (21); a bracket (30) accommodated in the housing and supporting the plurality of cells; a first metal plate (61) accommodated in the housing, where the first metal plate is substantially perpendicular to the central axis of the cell, and the first metal plate has openings through which the airflow ejected from the electrodes passes through ; and a second metal plate (62) accommodated in the housing, where the second metal plate is substantially parallel to the first metal plate, and the second metal plate and the first metal plate form an exhaust channel (63a) for guiding the airflow to be discharged out of the housing.

A blowing device includes a main housing with a handle, a mounting portion for mounting a nozzle; an electric motor including a motor body and a motor shaft; a fan discharging air from an air exhaust vent of the nozzle; and a power supply device. The fan is located between an air inlet of the main housing and the motor body in an axial direction of the motor shaft; a maximum rotational speed of the motor shaft is greater than or equal to 120,000 RPM and less than or equal to 300,000 RPM; a circuit board is located between the air exhaust vent and the motor body in the axial direction of the motor shaft; and when the electric motor is driven at the maximum rotational speed, maximum wind pressure of air discharged from the air exhaust vent is greater than or equal to 12 kPa and less than or equal to 230 kPa.

Provided are a power tool and a control method thereof. The power tool includes: a functional element; an electric motor including a stator and a rotor and configured to drive the functional element to rotate; a power supply module configured to supply power to the electric motor; a driver circuit electrically connected to the electric motor and the power supply module and configured to apply a voltage of the power supply module to the electric motor; and a controller electrically connected to the driver circuit and configured to output a control signal to the driver circuit. The controller is configured to, when the electric motor is overloaded, adjust a current limit value supplied to the electric motor and control the driver circuit in a first control mode, so as to cause a voltage of the electric motor to vary in a quasi-sine wave with a rotor position of the electric motor.

Provided is a fastener driver. The fastener driver includes a battery pack; a striking assembly including a striking member configured to strike a fastener; a drive assembly including at least a drive wheel configured to drive the striking member to move along a central axis of the striking member; an electric motor configured to drive the drive wheel to rotate; and a control circuit configured to control the electric motor to operate, start, or stop. A striking frequency of the striking member is greater than 6 fasteners/second.

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