crane
A technology of cranes and sheaves, which is applied in the direction of electromechanical devices, casings/covers/supports, electrical components, etc., and can solve problems such as insufficient cooling performance of electric motors
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no. 1 example
[0020] First, the crane 1 of the first embodiment will be described.
[0021] figure 1 is a partial cross-sectional view showing the front portion of the crane according to the first embodiment.
[0022] Such as figure 1 As shown, the crane 1 comprises: a sheave 2 arranged so that a rope for suspending an elevator car or the like can be wound around the sheave; an electric motor 3 rotationally driving the sheave 2; supporting the sheave 2 and a pair of support units 4 and 5 for the electric motor 3; and a base 6 for supporting the electric motor 3 and the support units 4 and 5. Bearings 4a and 5a are arranged on the bearing units 4 and 5, respectively.
[0023] figure 2 is along figure 1 Cross-sectional view obtained on line II-II. image 3 is along figure 2 Cross-sectional view obtained on line III-III.
[0024] Such as image 3 As shown, the electric motor 3 is mainly equipped with a rotor 10 , a stator 20 , a frame 30 , an air inlet 41 , an air outlet 42 , a blow...
no. 2 example
[0048] Next, the electric motor 103 provided in the crane of the second embodiment will be described.
[0049] Figure 4 is an explanatory diagram showing an electric motor according to the second embodiment, and is a diagram corresponding to figure 1 A partial cross-sectional view of a portion of line II-II.
[0050] exist figure 2 In the first embodiment shown, the electric motor 3 comprises support ribs 39 . compare to, Figure 4 The illustrated embodiment differs from the first embodiment in that the electric motor 103 does not include support ribs (as does the subsequent embodiment). exist figure 2 In the first embodiment shown, a pair of intake ports 41 and a pair of exhaust ports 42 are formed in the tube 31 of the electric motor 3 . compare to, Figure 4 The illustrated embodiment differs from the first embodiment in that the intake port 41 and the exhaust port 42 are formed one-to-one in the tube 131 of the electric motor 103 . and Figures 1 to 3 The same ...
no. 3 example
[0057] Next, the electric motor 203 provided in the crane of the third embodiment will be described.
[0058] Figure 6 is an explanatory diagram showing an electric motor according to the third embodiment, and is a diagram corresponding to figure 1 A partial cross-sectional view of a portion of line II-II.
[0059] Figure 6 The third embodiment shown is different from the first embodiment in that the first partition plate 48A and the second partition plate 48B dividing the ventilation space R in the circumferential direction are respectively arranged at the corresponding adjacent air inlets 41 and between corresponding adjacent exhaust ports 42 . Additionally, with Figures 1 to 3 The same configurations as those of the illustrated first embodiment are denoted by the same reference numerals and will not be described in detail again.
[0060] Such as Figure 6 As shown, the first partition plate 48A and the second partition plate 48B are arranged in the ventilation spac...
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