Please select the most similar patent number from A, B, C and D. Which number is?
A household two-speed multi-functional food processing machine comprises a container (4), a container cover (2, 3) and a power head (1). The power head (1) is connected to a transmission device of the food processing machine through a universal connection head (5) and a driving shaft (8). The transmission device comprises a common speed reduction transmission system (10), a high-speed transmission system (20) and a low-speed transmission system (30). The common speed reduction transmission system (10) is connected to the high-speed transmission system (20) and the low-speed transmission system (30). Final output of the high-speed transmission system (20) and final output of the low-speed transmission system (30) are coaxially assembled, and during use, one of the final output of the high-speed transmission system and the final output of the low-speed transmission system is selected for installing a high-speed drive shaft (20) or a low-speed drive shaft (30). The food processing machine can adapt to different requirements of different food processing accessories for the speed and the torque, and has the convenient operation and portable structure.
A: A dual axis, horizontal, pure electric driving force system for use in vehicles, comprising: a first driving motor (1), a second driving motor (8) and a gearbox; an inner portion of the gearbox is provided therein with a first high-speed transmission gear train (3, 9) and a second low-speed transmission gear train (4, 12), which are connected to the first driving motor (1), and a third high-speed gear train (6, 17) and a fourth low-speed transmission gear train (5, 15), which are connected to the second driving motor (8); the power of the two driving motors (1, 8) is outputted either individually or in combination by means of different combinations of each of said gear trains. The dual axis, horizontal, pure electric driving force system for use in vehicles has a simple structure and may be easily arranged, while acceleration and climbing ability are high, shifting gears is smooth and uninterrupted power may be guaranteed such that power needed for driving while shifting gears is continuously generated; at the same time, kinetic energy which is generated while a vehicle is driven may be converted in part to electric energy when braking, saving electric energy loss in part, thus reducing battery costs and increasing the driving range of electric vehicles.
B: A multifunctional food processor, relating to the technical field of kitchen appliances. The multifunctional food processor comprises a container (1), a top cover (3), and a drive component. A first working chamber (11) is provided in the container (1); a second working chamber (31) is provided in the top cover (3); the top cover (3) is matchedly provided on the container (1); the drive component comprises a drive rod; the drive rod extends downwards from the top cover (3); a food processing device is matchedly provided on the drive rod. The food processing device is a stirring device (7) or a cutting device (8) mounted in the container, and may be used for both stirring food and cutting up food. Moreover, the food processing device may be a cutter disc device. A device consisting of a food fixing device in the top cover (3) and the cutter disc device may be used for cutting food into slices and shreds. The present invention has multiple functions, is convenient to use, and can greatly reduce the space occupied and production and use costs.
C: Provided are novel electric supporting legs, comprising a left supporting leg, a right supporting leg, a middle shaft for connecting the left supporting leg and the right supporting leg and an electric driving mechanism. The electric driving mechanism comprises an electric motor, a shell (6), a front swing plate (8) and a poking rod mechanism. An output shaft (51), an output shaft gear (5), an input shaft (25) and an input shaft multi-speed-ratio gear (2) are installed in the shell. An electric motor shaft is coupled to a bevel pinion (1). The bevel pinion meshes with conical teeth of the input shaft multi-speed-ratio gear. A high-speed transmission gear (3) and a low-speed duplicate gear assembly (4) are installed on the front swing plate. The poking rod mechanism makes the front swing plate swing left and right with the input shaft as a fulcrum, so that the output shaft gear is in drive connection with the input shaft multi-speed-ratio gear through the high-speed transmission gear or the low-speed duplicate gear assembly, and the electric motor shaft provides power for the output shaft at different speed ratios. The input shaft multi-speed-ratio gear and the low-speed duplicate gear assembly are manufactured through powder metallurgy and pressure casting. The electric supporting legs are rational in structure and save on labour when operating.
D: A battery pole piece roller machine power transmission system, comprising a power mechanism and a transmission mechanism. The power mechanism is a power mechanism (10) having a transmission motor and a speed reducer integrated together. The transmission mechanism is the speed reducer (20). An output end of the power mechanism is connected to an input end of the transmission mechanism via coupling A (30). An output end of the transmission mechanism is connected to a transmission shaft of two rollers (40) of the battery pole piece roller machine via coupling B (50). The system divides the power mechanism and the transmission mechanism into two parts independent of each other, while the power mechanism itself is a structure having the transmission motor and the speed reducer integrated together, therefore, the battery pole piece roller machine power transmission system is capable of changing flexibly the output rotation and output torque of the entire transmission system by means of convenient replacement of power mechanisms having identical installation sizes but different motor powers and reduction ratios, thus adapting to a variety of requirements currently found in battery pole piece production technique.
Answer: B