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公开(公告)号：US11844305B2
公开(公告)日：2023-12-19
申请号：US17869830
申请日：2022-07-21
发明人： Yufei Ren , Yang Li , Ronggen Zhu , Haishen Xu , Rui Zhang
IPC分类号： A01D34/78 , A01D34/68 , A01D101/00
CPC分类号： A01D34/6806 , A01D34/78 , A01D2034/6843 , A01D2101/00
摘要： A walk-behind self-propelled working machine includes a main body, an operation switch, and a handle device. The main body includes a moving assembly and a drive motor. The operation switch is connected to the drive motor. The handle device is connected to the main body and includes an operation member, a connecting rod, and a sensing device. The operation member includes a gripping portion for a user to hold. The connecting rod is connected to the main body. The sensing device is configured to sense a thrust that is applied to the handle device to drive the walk-behind self-propelled working machine and further includes a pressure sensor and a pressing member. When the gripping portion receives the thrust, the pressing member applies a force along a preset straight line to the pressure sensor to drive the pressure sensor to deform.
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公开(公告)号：US20220361401A1
公开(公告)日：2022-11-17
申请号：US17869830
申请日：2022-07-21
发明人： Yufei Ren , Yang Li , Ronggen Zhu , Haishen Xu , Rui Zhang
摘要： A walk-behind self-propelled working machine includes a main body, an operation switch, and a handle device. The main body includes a moving assembly and a drive motor. The operation switch is connected to the drive motor. The handle device is connected to the main body and includes an operation member, a connecting rod, and a sensing device. The operation member includes a gripping portion for a user to hold. The connecting rod is connected to the main body. The sensing device is configured to sense a thrust that is applied to the handle device to drive the walk-behind self-propelled working machine and further includes a pressure sensor and a pressing member. When the gripping portion receives the thrust, the pressing member applies a force along a preset straight line to the pressure sensor to drive the pressure sensor to deform.
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公开(公告)号：US20240198483A1
公开(公告)日：2024-06-20
申请号：US18595749
申请日：2024-03-05
CPC分类号： B24B55/102 , B24B23/02 , B24B47/12
摘要： A sander includes an airflow element rotatable about a central axis along a preset direction of rotation to generate a dust removal airflow; an electric motor for providing a power source for the airflow element; and a battery pack for providing an energy source for the electric motor. When the sander is in a load-free state, the working duration of the sander when the battery pack consumes 10 WH of energy is defined as the functional time T of the sander; and the product of the load-free rotational speed N of the electric motor and the functional time T of the sander is greater than or equal to 63000 rpm·min and less than or equal to 120000 rpm·min.
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公开(公告)号：US20230037664A1
公开(公告)日：2023-02-09
申请号：US17972272
申请日：2022-10-24
发明人： Ronggen Zhu , Yufei Ren , Dezhong Yang , Yang Li , Haishen Xu , Rui Zhang
摘要： A rear-moving, self-propelled working machine includes a main machine and a handle device. The main machine includes a moving assembly and a motor for driving the moving assembly. The handle device is connected to the main machine and includes an operation member, a connecting rod assembly, a housing, a sensing device, and a trigger assembly. The operation member includes a grip for a user to hold. The connecting rod assembly includes a first connecting rod connected to the main machine. The sensing device is used for sensing a thrust applied to the handle device to drive the rear-moving, self-propelled working machine. The trigger assembly is capable of applying a force to the sensing device when the grip receives the thrust. The trigger assembly is connected to the connecting rod assembly, and the sensing device is connected to the operation member.
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公开(公告)号：US20220132732A1
公开(公告)日：2022-05-05
申请号：US17576567
申请日：2022-01-14
发明人： Yufei Ren , Yang Li , Ronggen Zhu , Haishen Xu , Rui Zhang
摘要： A walk-behind self-propelled working machine includes a main body, an operation switch, and a handle device. The main body includes a moving assembly and a drive motor. The operation switch is connected to the drive motor. The handle device is connected to the main body and includes an operation member, a connecting rod, and a sensing device. The operation member includes a gripping portion for a user to hold. The connecting rod is connected to the main body. The sensing device is configured to sense a thrust that is applied to the handle device to drive the walk-behind self-propelled working machine and further includes a pressure sensor and a pressing member. When the gripping portion receives the thrust, the pressing member applies a force along a preset straight line to the pressure sensor to drive the pressure sensor to deform.
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公开(公告)号：US20230271296A1
公开(公告)日：2023-08-31
申请号：US18314233
申请日：2023-05-09
发明人： Rui Zhang , Xiangqing Fu
IPC分类号： B24B23/04
CPC分类号： B24B23/04
摘要： A sander includes a housing, an electric motor, a fan assembly, an eccentric element, a base plate assembly including a base plate, a support for supporting the eccentric element. The support includes a first end surface and a second end surface opposite to each other, and the second end surface is disposed on a side of the support facing the lower surface relative to the first end surface. The sander further includes a counterweight connected to the eccentric element. The ratio of the distance from the centroid of the counterweight to the lower surface of the base plate to the distance from the first end surface of the support to the lower surface of the base plate is greater than or equal to 0.1 and less than or equal to 0.5.
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公开(公告)号：US20220118534A1
公开(公告)日：2022-04-21
申请号：US17500068
申请日：2021-10-13
发明人： Wei Zhang , Zhongquan Xu , Rui Zhang , Yang Zhou , Suixi Ding
IPC分类号： B23D49/16
摘要： A reciprocating saw includes a housing; a functional assembly including a motor supported by the housing; a sliding rod for connecting and driving the saw blade; a transmission mechanism connecting the motor and the sliding rod for driving the sliding rod to reciprocate. The reciprocating saw further includes a connecting device configured to rotatably connect the functional assembly to the housing and a buffer arranged between the functional component and the housing.
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公开(公告)号：US10890229B2
公开(公告)日：2021-01-12
申请号：US16744512
申请日：2020-01-16
发明人： Rui Zhang
IPC分类号： F16F15/121 , B24B23/00 , B24B41/00 , B25F5/00 , B25F5/02
摘要： A power tool includes a housing, an auxiliary handle, and a vibration damping assembly. The auxiliary handle includes a front end and a gripping portion. The vibration damping assembly includes a mass member and an elastic element. The auxiliary handle further includes an end cap arranged at a rear end of the gripping portion where the rear end is far away from the housing relative to a front end of the gripping portion. An accommodating cavity for accommodating the vibration damping assembly is formed around the gripping portion. The elastic element is arranged between a mass member and a cavity wall of the accommodating cavity. A ratio of a natural frequency W1 of the vibration damping assembly to a rotation frequency W2 of an output shaft in rotation is greater than or equal to 0.7 and less than or equal to 1.3.
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公开(公告)号：US20200149609A1
公开(公告)日：2020-05-14
申请号：US16744512
申请日：2020-01-16
发明人： Rui Zhang
IPC分类号： F16F15/121 , B25F5/00 , B24B23/00 , B25F5/02 , B24B41/00
摘要： A power tool includes a housing, a motor, an output shaft, a working head, a transmission assembly, an auxiliary handle, and a vibration damping assembly. The auxiliary handle includes a front end mounted at a position of the housing adjacent to the working head, and further includes a gripping portion extending along a center line. The vibration damping assembly includes a mass member and an elastic element. The auxiliary handle further includes an end cap arranged at a rear end of the gripping portion where the rear end is far away from the housing relative to a front end of the gripping portion. An accommodating cavity for accommodating the vibration damping assembly is formed around the gripping portion when the end cap is combined with the gripping portion. The elastic element is arranged between the mass member and a cavity wall of the accommodating cavity, and a ratio of a natural frequency W1 of the vibration damping assembly to a rotation frequency W2 of the output shaft in rotation is greater than or equal to 0.7 and less than or equal to 1.3.
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