A mathematical calculator, and a method of using the same, is disclosed which can help people, particularly children, to easily learn and master multiplication operations. The mathematical calculator comprises a substantially cylindrical platform, and in accordance with a first embodiment, the multiplicands and multipliers are located within a plurality of columns and rows defined upon a plurality of adjacent wheels which are rotatable around a longitudinal axis of the platform, whereas in accordance with a second embodiment, the multiplicands and multipliers are located within a plurality of columns and rows which are defined upon a solid block.

A mathematical calculator, and a method of using the same, is disclosed which can help people, particularly children, to easily learn and master multiplication operations. The mathematical calculator comprises a substantially cylindrical platform, and in accordance with a first embodiment, the multiplicands and multipliers are located within a plurality of columns and rows defined upon a plurality of adjacent wheels which are rotatable around a longitudinal axis of the platform, whereas in accordance with a second embodiment, the multiplicands and multipliers are located within a plurality of columns and rows which are defined upon a solid block.

Aspects of the disclosure relate to an engine support system and method. The engine support system includes a frame mounted engine support and at least one engine mounted coupler. The engine support includes a frame mount with an elongated body and opposing arms slidably disposed on the elongated boy for releasably engaging a frame of a vehicle, and at least one jack assembly. Each jack assembly includes a collar coupled to and horizontally movable along the elongated body, and a jack rod coupled to and vertically movable relative to the collar. The jack rod includes a ball mount configured to insert into the coupler at an underside of an engine block of the vehicle. Each jack assembly is configured to support and/or lift the engine block relative to the vehicle frame by vertical movement of the ball mount into the coupler and relative to the frame mount engaged with the vehicle frame.

Aspects of the disclosure relate to an engine support system and method. The engine support system includes a frame mounted engine support and at least one engine mounted coupler. The engine support includes a frame mount with an elongated body and opposing arms slidably disposed on the elongated boy for releasably engaging a frame of a vehicle, and at least one jack assembly. Each jack assembly includes a collar coupled to and horizontally movable along the elongated body, and a jack rod coupled to and vertically movable relative to the collar. The jack rod includes a ball mount configured to insert into the coupler at an underside of an engine block of the vehicle. Each jack assembly is configured to support and/or lift the engine block relative to the vehicle frame by vertical movement of the ball mount into the coupler and relative to the frame mount engaged with the vehicle frame.

Conventional vehicle lifts typically operate at a standard speed that is statically configured for the system, which may result in vehicles that are below the weight rating for the lift being raised at the standard speed while the lift motor is capable of safely raising at greater speeds. A set of lift controls may be configured to determine the load on the motor by a vehicle of an unknown weight during operation at a standard lift speed and use such information to determine a potential speed that the motor may raise the vehicle at while staying within safe operational levels for the motor. One or more of a magnitude of electrical power drawn, a pressure generated by a hydraulic lifting, or a sensed vehicle weight may be used to provide an indication of load on the motor and/or a higher potential speed.

A jack assembly that has a base member having a handle assembly extending therefrom, a remote control positioned in the handle assembly, a handle base section of the handle assembly that comprises a battery coupler and a control unit, an electric motor coupled to the base member and providing a torque to a gear assembly, the gear assembly coupled to a ball screw, a carriage slidably coupled to the base member, the carriage having a lift nut coupled thereto, the ball screw threaded through the lift nut such that rotation of the ball screw moves the lift nut, and carriage, linearly along the base member, and a lifting arm pivotally coupled to the carriage on one end and pivotally coupled to a pivot arm at an intermediate location.

A jack assembly that has a base member having a handle assembly extending therefrom, a remote control positioned in the handle assembly, a handle base section of the handle assembly that comprises a battery coupler and a control unit, an electric motor coupled to the base member and providing a torque to a gear assembly, the gear assembly coupled to a ball screw, a carriage slidably coupled to the base member, the carriage having a lift nut coupled thereto, the ball screw threaded through the lift nut such that rotation of the ball screw moves the lift nut, and carriage, linearly along the base member, and a lifting arm pivotally coupled to the carriage on one end and pivotally coupled to a pivot arm at an intermediate location.

A powered base assembly includes first and second structures that are operably interconnected by at least three legs that can include electrically-powered linear actuators. Each electrically powered actuator includes a housing and a rod associated with the housing. Each rod is connected to one of the first and second structures by a swivel joint having two degrees of freedom, and each housing is connected to the other of the first and second structure by a swivel joint having one degree of freedom. The linear actuators can be actuated to thereby change at least one of an angular position of the first structure relative to the second structure and a distance of the first structure, relative to the second structure. In this way, the base assembly may be used for leveling or moving a payload placed on the first structure; the payload weight is transferred linearly through the legs to the second structure. The configuration of the legs and the second structure enable to the second structure to be placed on a surface to support the base assembly while minimizing the bending moment on the second structure.

A powered base assembly includes first and second structures that are operably interconnected by at least three legs that can include electrically-powered linear actuators. Each electrically powered actuator includes a housing and a rod associated with the housing. Each rod is connected to one of the first and second structures by a swivel joint having two degrees of freedom, and each housing is connected to the other of the first and second structure by a swivel joint having one degree of freedom. The linear actuators can be actuated to thereby change at least one of an angular position of the first structure relative to the second structure and a distance of the first structure, relative to the second structure. In this way, the base assembly may be used for leveling or moving a payload placed on the first structure; the payload weight is transferred linearly through the legs to the second structure. The configuration of the legs and the second structure enable to the second structure to be placed on a surface to support the base assembly while minimizing the bending moment on the second structure.

The present disclosure provides a battery swapping robot and a lifting device thereof. The lifting device includes a base (1). The base (1) is provided with at least two vertical posts (3), each post (3) is vertically provided with a guide rail (13), the guide rail (13) is movably provided with a lifting support arm (5), and the lifting support arm (5) is connected to a lifting driving mechanism (4). The upper limit of the lifting height of the lifting device is increased in such a way that the post and the lifting support arm slide against each other, which breaks the limitation that a battery cannot be lifted beyond a crossbeam in the prior art, and the power swapping mode is safer, and more reliable and efficient. The structural space of the power swapping robot adopting the lifting device is more compact and effective.