JPH0249134Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a support structure for an electric motor.

(Prior art) As a conventional electric motor support structure, there is a forklift traction motor support structure as shown in Figure 1 (Nitsun Batterry Forklift NFB003 type, FB003 type maintenance manual page 102, 1972) May, published by Nissan Motor Co., Ltd.). In the figure, 100 is a differential case, 101 is an axle tube, 102 is a differential gear, 103 is a hypoid pinion, 104, 10
5 are spur gear reduction gears, and 106 is a gear shaft rotatably supported in a gear case 107 by bearings 108 and 109.

The traction motor 110 is a direct current series winding self-ventilation type with a large starting torque, and the motor shaft 1
11 to gear shaft 10 with coupling 112
Serrations are connected to motor housing 11 to motor housing 11.
5 is fixed to the gear case 107 on the frame 113 side with a plurality of bolts 114, and a mounting bracket 116 fixed to the motor housing 115 is attached to the frame 11 with bolts 117.
It is fixed and supported to 3.

However, in the case of such a traction motor support structure, when replacing the brush, which is a consumable item, it is necessary to remove the motor 110 from the vehicle if the brush cover (not shown) is obstructed by other parts. After supporting the motor 110 with jacks or the like, the bolts 117 for attaching the motor housing 115 to the frame 113 and the bolts 114 for attaching the motor housing 115 to the gear case 107 are removed. Therefore, there were problems in that the work was complicated and dangerous.

(Purpose of the invention) This invention was made in view of these conventional problems. When replacing the brush, the fixed connection of the motor housing to the frame is released, and the motor housing can be rotated relative to the frame. It is an object of this invention to solve the above-mentioned problems by supporting the brush and rotating the housing to facilitate brush replacement.

(Example) This invention will be described below with reference to examples shown in FIGS. 2 to 4.

1 is a drive wheel, 2 is a brake device, 3 is an axle tube, and 4 is a drive axle mount plate fixed to a frame 5. A gear case 6 housing a reduction gear is fixed to the axle tube 3 with bolts 7, and a motor housing 10 of a traction motor 9, which is an electric motor, is placed horizontally and fixed to the case 6 with bolts 8. The bolt 8 may be any support member that detachably fixes the motor housing 10 to the frame 5 side. A motor shaft 11 protruding from one end of the motor housing 10 is serration-coupled with a coupling ring 13 to a gear shaft 12 rotatably supported by a gear case 6 on the frame 5 side.
14 is a brush cover for brush replacement.

As shown in FIG. 3, the motor housing 10 has a gear case 6 attached to an annular stepped surface 10a that protrudes from the center of the motor shaft 11, as shown in FIG.
The annular stepped surface 6a is fitted to support rotatably. The other end of the motor housing 10 is rotatably attached to a frame 5 aligned with the axis of the motor shaft 11.
It is supported on the side. That is, as shown in detail in FIG. 4, the cap 16 is fitted onto the protrusion 10b of the motor housing that protrudes outward as a housing portion for the bearing 15 that supports the end of the motor shaft 11.
The axial center of the first short tube 17 fixedly welded to the cap 16 is aligned with the axial center of the motor shaft 11. In addition, the second short tube 19 of the support 20, which has a relatively large diameter second short tube 19 fixed to the base plate 18 by welding, is inserted through the through hole 4a of the drive axle mount plate 4, and the first short tube 19 of the cap is The tube 17 is inserted and supported, and the substrate 18 is fixed to the plate 4 with a plurality of bolts 21. Reference numeral 22 denotes an insulator which is compressed and interposed within the first short cylinder 17 between the cap 16 and the base plate 18, and has the function of suppressing rattling and vibration of the traction motor 9.
Note that the first short tube 17 has a large diameter, and the second short tube 1
9 may be a small diameter.

Next, the brush replacement work will be explained. When the brushes have worn out by a predetermined amount due to the vehicle running for a certain period of time, first, the motor housing 10 is attached to the frame 5.
Remove the bolt 8 that is fixed to the side. In this state, the motor housing 10 of the traction motor 9
is supported by a stepped surface 10a at one end that fits into a stepped surface 6a of the gear case 6 on the frame 5 side, and a first short tube 17 at the other end is connected to a second short tube 1 on the frame 5 side.
It is supported at 9 and is rotatable with respect to the frame 5. Therefore, the joint 14a of the brush cover 14
Move it to an easy-to-access place, undo the joint, and remove the cover 1.
Remove 4. Next, while rotating the motor housing 10, the brush normally disposed opposite to the housing 10 is replaced with a new one.

Note that this invention is not limited to the support structure of the traction motor of a forklift.
It can be widely applied as a support structure for electric motors.

(Structure of the invention) As explained above, according to the invention, one end of the motor housing, which is the protruding side of the motor shaft of an electric motor provided with a brush cover, is centered on the axis of the motor shaft, A first shaft is rotatably supported by fitting an annular stepped surface provided on the housing and an annular stepped surface on the frame side, and whose axis is aligned with the axis of the motor shaft at the other end of the motor housing.
A short tube is provided, a substrate provided with a second short tube is fixed to the frame side, the first short tube and the second short tube are rotatably fitted, and the motor housing is detachably attached. This is a support structure for the electric motor that is fixed to the frame using a support member.

(Effects of the invention) Therefore, the electric motor can be compactly housed in the frame without worrying about interference with other parts, and the brushes, which are consumables, can be replaced easily.
Since the fixation of the motor housing to the frame side by the support member can be released and the motor shaft can be operated while being connected to the gear shaft or the like, efficiency is greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional electric motor support structure, Fig. 2 is a plan view showing an embodiment of this invention, and Fig. 3 is an enlarged half sectional view showing one end support part of the motor housing. , FIG. 4 is an enlarged sectional view showing the other end support portion of the motor housing. 4... Drive axle mount plate (frame side), 5... Frame, 6... Gear case (frame side), 6a... Annular stepped surface, 8... Bolt (supporting member), 9... Traction motor (electric motor), 10... motor housing, 10a...
Annular stepped surface, 11... Motor shaft, 14... Brush cover, 16... Cap, 17... First short tube,
19...Second short tube, 20...Support.

Claims (1)

[Scope of utility model registration request] One end of the motor housing, which is the protruding side of the motor shaft of an electric motor equipped with a brush cover, is centered on the axis of the motor shaft, and the annular stepped surface provided on the motor housing fits into the annular stepped surface on the frame side. A first short tube is provided at the other end of the motor housing, the first short tube is rotatably supported by the motor housing, and the second short tube is provided on the substrate, which is fixed to the frame side. A support structure for an electric motor, characterized in that a first short tube and a second short tube are rotatably fitted, and a motor housing is fixed to a frame side with a detachable support member.