Drives for Electric Vehicles
A driving device, electric vehicle technology, applied in electric vehicles, electric power devices, electromechanical devices, etc., can solve the problems of reduced input shaft rotation accuracy, bearing rotation noise, bearing durability, etc., to suppress rotation noise and improve bearings. Rigidity and the effect of preventing partial load from acting
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Embodiment approach 1
[0125] like figure 1 As shown, the main components of the driving device for an electric vehicle in Embodiment 1 include: a motor 11, a deceleration unit 12 driven by the output of the motor 11, an input shaft 13 and a coaxial output member 14 driven by the deceleration unit 12 The rotating hub unit 15 and the casing 16 accommodate the electric motor 11 and the reduction unit 12 .
[0126] The casing 16 has a cylindrical portion 17 and a radial front end portion 18 provided at the front end (the outer end portion, the left end portion in the drawing). The center portion of the front end portion 18 is open, and the rear end portion of the outer member 21 of the hub unit 15 is fitted into the open portion 19 , and the flange 22 is fixed to the front end portion 18 by bolts 23 .
[0127] Inside the front end portion 18 of the case 16, a partition wall bottom 18a having a larger diameter is provided concentrically with the opening 19, and a dish-shaped partition wall member 20 is...
Embodiment approach 2
[0174] Figure 7 The illustrated second embodiment differs from the above-described first embodiment in the configuration of the hub unit 15 . That is, the flange 22 of the outer ring member 21 of the hub unit 15 in this case is formed to be larger than the flange 22 of the above-mentioned Embodiment 1 (refer to figure 1 ) major diameter.
[0175] A flange cylindrical portion 32 protruding in the axial direction is provided on the inner surface of the large-diameter flange 22 . The flange cylindrical portion 32 extends toward the outer diameter surface of the flange 53 on the outer side of the output member 14 . This flange cylindrical portion 32 is fitted into the inner diameter surface of the open hole 19 of the front end portion 18 of the housing 16 .
[0176] Since the inner diameter of the open hole 19 is formed larger than in the case of the above-mentioned first embodiment, in the case of the second embodiment, it is easy to manufacture the partition wall 24 integral...
Embodiment approach 3
[0183] Figure 8 ~ Figure 10 In the case of the illustrated third embodiment, the structures of the hub unit 15 , the rotation sensor 75 , the power terminal box 76 , and the connector insertion portion 78 are different from those of the first embodiment.
[0184] That is, in the hub unit 15 in this case, the flange 22 of the outer member 21 is formed to have a larger diameter than in the case of the first embodiment. Therefore, it is not necessary to use the partition wall bottom portion 18a as in Embodiment 1, and a single case 16 is used. The above-mentioned large-diameter flange 22 is fixed to the casing 16 by a screw 23 .
[0185] The outer balls 89 a constituting the hub bearing are interposed between the track grooves provided on the outer diameter surface of the inner member 46 and the track grooves provided on the inner diameter surface of the outer member 21 . In addition, the inner ball 89 b is interposed between the track groove provided on the outer diameter sur...
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