JP2013046425A - Bearing part replacement structure and method for main electric motor for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for a support plate for disassembly, a fitting seat of the support plate for disassembly, etc., such that even when only a bearing part is removed, gaps 11, 14 are held since a bearing used for a main electric motor for vehicle wears more and more as the main electric motor is placed continuously in operation and needs to be replaced, and the bearing part thereby needs to be removed from the stator and rotor.SOLUTION: The constitution of a fitting part between a bearing box and a stator frame is modified, and a seat provided to the rotor and a dedicated tool are used to remove or incorporate the bearing box. When the bearing part is removed from a main electric motor body so as to replace a ball bearing, the bearing box and ball bearing are removed without separating the rotor from the stator, and the ball bearing can be replaced, so that disassembly maintenance can be simplified. Because of the structure of the support plate for disassembly, the fitting seat of the support plate for disassembly, etc., the gaps 11, 14 are held and only the bearing part can be removed.

Description

  The present invention relates to a structure of a bearing portion on the counter-transmission side, a method for disassembling and assembling the bearing portion, and the like, which do not require a rotor to be pulled out from a stator when replacing the bearing on the counter-transmission side.

  The bearing used in the vehicular main motor needs to be replaced because the wear progresses and reaches the end of life as the main motor continues to operate. For this reason, it is necessary to remove a bearing part from a stator and a rotor.

This state is shown in FIG.
FIG. 2 is an explanatory view showing an example of the prior art. 1 is a stator, 2 is a rotor, 3 is a ball bearing, 4 is a bearing box, 5 is a bearing cover, 6 is a bearing retainer, 7 is 3 and 4 The assembled bearing portion, 8 is a fitting portion of the bearing box, 9 is a fitting portion of the stator, 10 is a rotor shaft, and 11 is a gap.
In FIG. 2, the bearing portion 7 is pulled out from the stator 1 while being attached to the rotor 2.

However, such means have the following problems.
When the bearing portion 7 is removed from the main motor body in order to replace the ball bearing 3, the bearing portion fitting portion 8 is located on the inner side of the stator than the fitting portion 9, so that only the bearing portion 7 is used. It cannot be removed from the motor body. For this reason, the bearing portion 7 needs to be removed from the stator 1 while being attached to the rotor 2, and the rotor 2 is pulled out from the stator 1.

  In order to solve this problem, a structure in which the bearing portion 7 can be removed in the counter-transmission side direction may be used. By simply changing the positional relationship so that the fitting portion 8 of the bearing box is on the outside of the machine and the fitting portion 9 of the stator is on the inside of the machine, the rotor 2 is limited to the gap 11 when the bearing portion 7 is pulled out. Since the gap 14 in the labyrinth portion of the bearing portion is narrower than the gap 11, the interference occurs and becomes an obstacle when the bearing portion 7 is assembled.

JP 2009-225532 A JP 2010-213380 A

  The present invention was devised in view of the above-mentioned points. The purpose of the present invention is to solve these problems, to remove the bearing portion without pulling out the rotor from the stator, and to replace the ball bearing. Therefore, it is possible to provide a vehicular main motor that can simplify disassembly and maintenance. Furthermore, it is to provide a structure such as a disassembly support plate and a disassembly support plate mounting seat so that the gaps 11 and 14 are maintained even if only the bearing portion is removed.

  According to the first aspect of the present invention, in a vehicular main motor having a stator, a rotor, a ball bearing, a bearing cover, a bearing box and the like, the bearing cover (5) of the ball bearing has a support plate (13) for disassembly. The stator has a first mounting hole, the stator fitting portion (9) has a second mounting hole for the disassembly support plate, and the rotor disassembly support plate mounting seat (12). Has a third mounting hole for the disassembly support plate, and the disassembly support plate passes through the first mounting hole, the second mounting hole, and the third mounting hole and is fixed. It is characterized by that.

  According to the invention of claim 2, in the disassembly support plate according to claim 1, the fitting portion of the stator, and a mounting seat of the disassembly support plate, the disassembly support plate is a fitting portion of the stator. A plurality of protrusions are formed on the disassembly support plate, and the dismounting support plate is attached to a mounting seat of the disassembly support plate. The number of the third mounting holes is the same as the number of the plurality of protrusions.

  According to the invention of claim 3, when the ball bearing of the vehicular main motor is replaced, an assembly in which the ball bearing is incorporated in the bearing box on the reaction transmission side of the vehicular main motor (hereinafter referred to as a bearing portion). ) In the horizontal cylindrical cavity of the stator of the vehicular main motor is rotatably moved relative to the stator in the front-rear direction of the rotor shaft to move the rotor from the stator. The bearing is removed from the main body of the vehicle main motor without being pulled out.

  That is, the means for achieving the object is to change the configuration of the fitting portion between the bearing box and the stator frame, and to provide the mounting seat of the disassembly support plate for securing the gap on the rotor and the bearing box. When removing or assembling the box, use a special tool.

  As described above, according to the present invention, when removing the bearing portion from the main motor body in order to replace the ball bearing, the bearing box and the ball bearing are removed without separating the rotor from the stator. By enabling replacement, disassembly and maintenance can be simplified, which is extremely useful in practice.

It is explanatory drawing which shows the Example of this invention. It is explanatory drawing which shows an example of the past.

  FIG. 1 is an explanatory view showing an embodiment of the present invention. Reference numeral 12 denotes a mounting seat for the disassembly support plate, and 13 denotes a disassembly support plate. 2 denote parts having the same configuration and function.

The procedure for removing the bearing portion 7 in FIG. 1 is shown below.
The disassembly support plate 13 is inserted into the machine through a plurality of attachment holes provided in the bearing cover 5 and the fitting portion 9 of the stator, and the disassembly support plate mounting seat 12 provided in the rotor 2 is attached. Insert into the hole. As a result, the position of the rotor 2 is fixed with respect to the stator 1, so that the bearing portion 7 can be moved rightward in FIG. 1 while the gap 11 is maintained.

  The disassembly support plate 13 is provided with a plurality of projections, which coincide with the number of fixing holes provided in the disassembly support plate mounting seat 12.

  A disassembly support plate 13 can be fixed to the fitting portion 9 of the stator.

1 Stator 2 Rotor 3 Ball Bearing 4 Bearing Box 5 Bearing Cover
6 Bearing retainer 7 Bearing part (3 and 4 assembled)
8 Fitting part of bearing housing 9 Fitting part of stator 10 Rotor shaft 11 Gap 12 Mounting seat of disassembly support plate 13 Disassembly support plate 14 Gap

Claims (3)

In a vehicular main motor having a stator, a rotor, a ball bearing, a bearing cover, and a bearing box, the bearing cover (5) of the ball bearing has a first mounting hole of a disassembly support plate (13), The stator fitting portion (9) has a second mounting hole for the disassembly support plate, and the disassembly support plate mounting seat (12) of the rotor has a third disassembly support plate. And the disassembly support plate is fixed by being fitted through and fixed to the first mounting hole, the second mounting hole, and the third mounting hole. Bearing part replacement structure.
2. The disassembly support plate according to claim 1, the fitting portion of the stator, and a mounting seat of the disassembly support plate, wherein the disassembly support plate and the second mounting hole of the fitting portion of the stator. A plurality of protrusions are formed in the disassembly support plate, and the same number of the plurality of protrusions as the plurality of protrusions are formed on the disassembly support plate. A bearing replacement structure for a vehicular main motor, comprising a third mounting hole.
When exchanging the ball bearing of the vehicular main motor, an assembly (hereinafter referred to as a bearing portion) in which the ball bearing is assembled in the bearing box on the counter-transmission side of the vehicular main motor is replaced by the vehicular main motor. The rotor provided rotatably in a horizontal cylindrical cavity of the stator is moved relative to the stator in the front-rear direction of the rotor shaft, and the bearing portion is moved away from the stator without pulling out the rotor. A bearing replacement method for a vehicular main motor, wherein the main motor is removed from the main body of the vehicular main motor.

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