Speed-reducing wheel-rim driving system using mass of motor as mass of power vibration absorber
A dynamic vibration absorber and wheel-side drive technology, applied in the directions of power plant, motion deposition, transportation and packaging, can solve the problems of rotational speed torque fluctuation, low efficiency of flexible coupler, etc., to reduce the unsprung mass and improve the vertical The effect of improving performance
Active Publication Date: 2014-08-13
TONGJI UNIV
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Problems solved by technology
However, using a flexible coupling is inefficient and may cause fluctuations in the rotational speed torque output to the wheels
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[0034] Please refer to the accompanying drawings for a further description of the present invention.
[0035] figure 1 is a 1 / 4 vehicle two-degree-of-freedom vibration model diagram of an ordinary wheel-drive electric vehicle, where m 1 is the unsprung mass except the motor, m 3 is the motor mass, m 2 It is 1 / 4 sprung mass. Since the motor is also part of the unsprung mass, the unsprung mass is larger.
[0036] In order to convert the motor into the mass of the dynamic shock absorber and reduce the unsprung mass of the wheel drive system, a three-degree-of-freedom vibration model diagram of a quarter of the vehicle with the motor as the mass of the dynamic shock absorber is proposed, as shown in figure 2 shown. where m 2 is 1 / 4 sprung mass, m 1 is the unsprung mass, mainly including the mass of wheels, rims, brake systems, half shafts, reduction mechanisms, reducer housings, etc., m 3 The mass of the motor is suspended in the wheel by the spring damping of the dynamic...
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The invention discloses a speed-reducing wheel-rim driving system using the mass of a motor as the mass of a power vibration absorber. A motor is suspended on a speed reducer shell through a power vibration absorber spring damper so that the mass of the motor is transferred into the mass of the power vibration absorber. The power is finally outputted to a wheel-rim driving vehicle through a first-stage speed reducing gear pair, an intermediate shaft, a second-stage speed reducing gear pair, a semiaxis and a wheel hub by a motor. The motor is suspended on the speed reducer shell through the power vibration absorber spring damper, thus the mass of the motor is transferred into the mass of the power vibration absorber, the power vibration absorber is not restricted by the wheel space and the whole vehicle mass, the performance of the power vibration absorber is enhanced, the unsprung mass of the wheel-rim driving system is reduced, and the negative effect caused by the large unsprung mass of the wheel-rim driving system is improved. The speed reducing wheel-rim driving system adopts a gear speed reducing mechanism and has high efficiency.
Description
technical field [0001] The invention relates to the field of electric vehicle chassis and transmission, in particular to a reduction wheel drive system in which the motor serves as the mass of a dynamic vibration absorber. Background technique [0002] Wheel drive means that the motor is arranged in the wheel or near the wheel, and the power is directly transmitted from the motor to the wheel or through the reduction gear to drive the vehicle. Because the wheel drive system omits the clutches, universal joints, transmission shafts and differentials of traditional cars, it has unique advantages compared with centralized drives, such as: the structure of the whole vehicle is simple, and the space available for the whole vehicle is increased. Large; short transmission chain, improved transmission efficiency of the drive system; dynamic control is more flexible and convenient. [0003] However, since the wheel drive system integrates components such as motors, deceleration mech...
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IPC IPC(8): B60K7/00
Inventor 陈辛波陆承超唐峰余卓平舒涛
Owner TONGJI UNIV