JPH0763652A - Method and device for inspecting motor bearing - Google Patents

Abstract

PURPOSE:To automatically inspect a motor bearing by using a fiber scope without disassembling the motor. CONSTITUTION:An inspection device 1 is provided with a drive shaft 5 journaled by a bearing part 6 on the top of a truck 4 and made freely rotatable by a drive device, a motor shaft lock device 7 provided at the end of the motor side of the drive shaft 5, and a detection device 8, provided in the bearing part 6, which includes a fiber scope and is allowed to freely rotate by a rotation device, and at the same time, allowed to freely move in the direction of a motor shaft 31 by a movement mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting an electric motor bearing, and more particularly to a method and an apparatus for inspecting an electric motor bearing for a vehicle using a fiberscope.

[0002]

2. Description of the Related Art Conventionally, the inspection of a bearing of an electric motor is carried out by disassembling the electric motor, taking out the bearing, and inspecting each bearing for the condition of wear or damage on the inner race, outer race of the bearing and the peripheral surface of the rolling element. It is done visually by a member.

As an inspection apparatus using a fiberscope, for example, there is an invention described in Japanese Patent Application Laid-Open No. 61-191945 as an apparatus for inspecting around the reactor vessel main body.

[0004]

However, in the above inspection, the electric motor must be disassembled to take out the bearing,
It takes a lot of work to take it out. In addition, it is very inefficient for the inspector to visually inspect the required parts of the taken out bearing, and even if a fiberscope is used, it is necessary to accurately position the fiberscope with respect to the bearing. There is. And today,
Electric motors used in railway vehicles are becoming brushless, and therefore, there is no need to disassemble the electric motors because it is not necessary to replace the brushes.

In view of this, the present invention has been made for the purpose of providing a method and an apparatus for automatically inspecting a bearing of an electric motor by using a fiberscope without disassembling the electric motor.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention relates to a shaft center of a drive shaft which is rotatably supported by a bearing unit provided on an upper portion of a carriage and is rotatable by a drive unit. After matching the axis of the motor shaft on which the motor bearing is mounted, the drive shaft is advanced to the motor shaft side, and the motor shaft locking device provided at the motor side end of the drive shaft is mounted on the motor shaft. A motor bearing that engages and moves the detection device provided on the bearing portion to the motor bearing side by the moving mechanism and swivels the detection device by the swivel device to inspect the fiberscope and the guide member provided on the detection device. The motor bearing inspection method is characterized in that the motor bearing is inspected by inserting it between the rolling elements of Existing drive shaft, a motor shaft locking device provided at the end of the drive shaft on the electric motor side, and a fiberscope and a guide member provided at the bearing portion, and in the axial direction of the electric motor shaft by a moving mechanism. And a detection device that is movable and can be swung by a swivel device.

[0007]

In the method of inspecting the electric motor bearing described above, the axis of the drive shaft that is rotatably supported by the bearing portion provided on the upper portion of the carriage is aligned with the axis of the electric motor shaft on which the motor bearing to be inspected is mounted. Then, the drive shaft is moved forward to the electric motor shaft side to engage the electric motor shaft locking device with the electric motor shaft, and the detection device provided in the bearing portion is moved to the electric motor bearing side by the moving mechanism. By inserting the fiber scope and the guide member, which are swiveled and provided in the detection device, between the rolling elements of the motor bearing to be inspected, it is possible to inspect the motor bearing in which the fiber scope is positioned correctly with respect to the bearing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the motor bearing inspection device of the present invention will be described below with reference to FIGS.

The inspection device 1 has an inspection device main body 2 and an electric motor holding device 3.

As shown in FIGS. 1 to 4, the inspection device main body 2 has a carriage 4, a drive shaft 5, a bearing portion 6 of the drive shaft 5, a motor shaft lock device 7, and a detection device 8. is doing.

The dolly 4 has a box-like shape and has wheels 10 which are driven by a drive device (not shown) on the lower portion thereof and travel on rails 9.
Is provided.

The bearing portion 6 comprises a front bearing portion 11 and a rear bearing portion 12 and is fixed to the upper surface of the carriage 4.

As shown in FIGS. 2 and 5, the front bearing portion 11 has an inner sleeve 13 and an outer sleeve 14, and the drive shaft 5 is supported inside the inner sleeve 13 via a bearing 15. Has been done. The bearing 1 is provided outside the inner sleeve 13.
6 is provided, and an outer sleeve 14 is provided outside the bearing 16. A cylinder mounting member 17 that constitutes the detection device 8 is fixed to the outer side of the outer sleeve 14, and a gear 18 that constitutes a turning device is attached to the end portion of the outer sleeve 14. And this gear 1
Reference numeral 8 meshes with a gear 20 having a wide tooth width, which is mounted on a step motor 19 which constitutes the turning device, and turns the detecting device 8. Reference numeral 21 indicates a gear cover.

As shown in FIGS. 2 and 3, the rear bearing portion 12 has a sleeve 22 and a casing 23, a spline 24 is formed inside the sleeve 22, and the spline 25 of the drive shaft 5 is a tooth. Have been combined. The sleeve 22 is axially supported by the casing 23 via a bearing 26. A gear 27 that constitutes a drive unit is attached to the sleeve 22 at a substantially central portion thereof. The gear 27 meshes with a gear 29 that is attached to a step motor 28 that constitutes the drive unit so that the drive shaft 5 is formed. It is designed to rotate. The casing 23 has these gears 27, 2
It is provided so as to surround 9.

The motor shaft locking device 7 includes a socket 30.
And a lock member 33 and a coil spring 34 which are fitted into the key groove 32 of the electric motor shaft 31.

The socket 30 has a bell shape and is provided at the tip of the drive shaft 5 so that the inner peripheral portion thereof fits into the tapered portion of the motor shaft 31.

The lock member 33 is substantially L-shaped, one end of which is pivotally attached to the tip of the socket 30 via a pin 35, and the other end of which is attached to the rear side of the socket 30 via a coil spring 34. There is. By doing so, the lock member 33 rotates the socket 30 to move the motor shaft 31.
By aligning its position with the keyway 32 of
2 can be fitted.

The detection device 8 includes a cylinder mounting member 17 and an air-cylinder 36 which constitutes a moving mechanism.
A fiberscope 37, a guide pin 38 as a guide member, and a holding member 39 for holding the fiberscope 37 and the guide pin 38.

The cylinder mounting member 17 has an elongated shape and is provided on the front bearing portion 11 so as to project forward. A rod 40 is attached to the tip of the cylinder mounting member 17, and a holding member 39 is inserted through the rod 40.

The holding member 39 and the cylinder mounting member 17 are connected by the air cylinder 36 so that the holding member 39 moves forward and backward in the axial direction of the electric motor shaft 31. Further, as shown in FIG. 7, the holding member 39 is equipped with a fiberscope 37 inserted between the rollers 42 as rolling elements of the bearing 41, and the rollers 42 on both sides of the fiberscope 37 and the rollers 42 on both sides of the fiberscope 37. A guide pin 38, which is inserted between the roller 42 and the roller 42 adjacent to the roller 42, is mounted so that the fiberscope 37 can be positioned with respect to the bearing 41.

The motor holding device 3 includes a roller conveyor 43.
A rail 45 into which the pallet 44 sliding on the top is fitted
And a jack frame 47 that is erected on the base plate 46.

The base plate 46 is made of a channel material or the like and has a rectangular shape. Two rails 45 are laid on the upper surface, and a roller conveyor 43 is provided between the rails 45 and 45 in parallel with the rail 45. .

An electric motor 48 is placed on the upper surface of the pallet 44, and a guide portion 49 fitted to the rail 45 is provided on the lower surface of the pallet 44. The guide portion 49 of the pallet 44 traveling on the roller conveyor 43. Is adapted to be fitted to the rail 45 of the base plate 46.

The jack frame 47 is a gate-shaped mast 50.
It is provided with two rails 51, a lifting table 52 fitted to the rails 51, and a lifting mechanism 53.

The mast 50 is provided upright near the end of the base plate 46. And the rail 51 is provided on one side of the mast 50.
The rail 51 is fitted with an elevating table 52 having a guide portion 54. And mast 5
An electric motor 55 and a speed reducer 56, which form an elevating mechanism 53, are provided in the upper part of 0, and a screw shaft (not shown) is provided vertically on the large gear side of the speed reducer 56. Then, a screwing piece (not shown) of the lifting table 52 is screwed onto the screw shaft, and when the electric motor 55 is rotated, the screw shaft is rotated to move the lifting table 52 up and down, and an engaging portion of the lifting table 52. By engaging 57 with the mounting foot 58 of the electric motor 48, the electric motor 48 moves up and down.

Next, the operation of the inspection apparatus 1 will be described.
First, the electric motor 48 is placed on the pallet 44. Then, the roller conveyor 43 travels and the pallet 44 travels. Then, the guide portion 49 of the pallet 44 is fitted to the rail 45 of the base plate 46. Then, the pallet 44 moves toward the jack frame 47 and stops when the axis of the electric motor 48 comes on a vertical line passing through the axis of the drive shaft 5. After that, the screw shaft rotates, the lifting table 52 rises, and the engaging portion 57 of the lifting table 52 engages with the mounting foot portion 58 of the electric motor 48. After that, the elevator 52 moves up and down and stops when the axis of the electric motor 48 coincides with the axis of the drive shaft 5 of the inspection apparatus body 2.
Then, the inspection device body 2 advances toward the electric motor 48 side, the socket 30 is fitted into the electric motor shaft 31, and the lock member 33 is fitted into the key groove 32.

Next, the air cylinder 36 of the detection device 8
The guide pin 3 that extends and is attached to the holding member 39
8, 38 are inserted between the rollers 42 of the bearing 41 to be inspected by the rotation of the gear 48 of the front bearing portion 11. Then, the fiberscope 37 is also inserted between the rollers 42 and 42, and the drive shaft 5 rotates or the detection device 8 rotates, and the fiberscope 37 causes the inner peripheral surface of the outer ring 61 of the bearing 41, the outer peripheral surface of the inner ring 62, and the roller. The circumference of 42 is inspected. Next, the air cylinder 36 is contracted, the guide pins 38, 38 and the fiberscope 37 are pulled out from the bearing 41, the drive shaft 5 rotates, and the detection device 8 is inserted between the next roller 42 and the roller 42 to be inspected.
The guide pins 38, 38 and the fiberscope 37 are inserted.

In this way, the motor bearings are sequentially inspected.

The fiberscope 37 may be connected to an image part, record an image, and inspect by this image, but the invention is not limited thereto. Further, it is also possible to automatically compare with the regular profile data to judge pass / fail.

FIGS. 9 and 10 show another embodiment of the inspection apparatus 1, and only the points different from the above-described inspection apparatus 1 will be described.

The inspection apparatus 1 comprises a carriage 4, a sliding portion 59,
It has an up-and-down turning unit 60.

Wheels 10 are provided on the lower portion of the carriage 4 so that they can travel on the rails 9 by a driving device (not shown). A sliding portion 59 is provided on the upper portion of the carriage 4 and can be moved on the carriage 4 in a direction orthogonal to the traveling direction load of the carriage 4 by a drive device (not shown). An elevating and revolving unit 60 is provided above the sliding unit 59 so that it can be moved up and down and revolved by a driving device (not shown). Then, the lifting / lowering swivel unit 6
A detection device 8 is provided on the upper part of 0.

By doing so, the detector 1 is
The axis of the drive shaft 5 can be easily aligned with the axis of the motor shaft 31.

[0034]

As described above, according to the method of inspecting a motor bearing of the present invention, the inspection is performed with respect to the axis of the drive shaft which is rotatably supported by the drive unit and which is rotatably supported by the bearing portion provided on the upper portion of the carriage. After matching the axis of the motor shaft on which the motor bearing is mounted, move the drive shaft forward to the motor shaft side, and engage the motor shaft lock device provided at the end of the drive shaft on the motor side with the motor shaft. , The detection device provided in the bearing portion is moved to the motor bearing side by the moving mechanism, and the detection device is swung by the swivel device to insert the fiberscope provided in the detection device between the rolling elements of the motor bearing to be inspected. Since the motor bearing is inspected, the trouble of disassembling the bearing from the motor can be saved and the efficiency can be greatly improved.

Further, the inspection apparatus according to the present invention includes a drive shaft which is rotatably supported by a bearing unit provided on an upper portion of the carriage and is rotatable by a drive unit, and an electric motor provided at an end portion of the drive shaft on the electric motor side. A shaft lock device, and a detection device that has a fiberscope provided in a bearing portion and is swivelable by a swivel device and movable in the axial direction of the electric motor shaft by a moving mechanism and that has a fiberscope and a guide member. As a result, the fiberscope can be automatically and properly inserted at the position of the bearing to be inspected, and the inspection accuracy can be greatly improved by checking the image from the fiberscope. There is.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an inspection apparatus of the present invention.

FIG. 2 is a partial cross-sectional side view showing an embodiment of the inspection device body of the present invention.

FIG. 3 is a plan view of FIG.

FIG. 4 is a front view of FIG.

FIG. 5 is a cross-sectional view of a detection device portion.

FIG. 6 is a sectional view showing a relationship between a bearing and a guide pin.

FIG. 7 is a front view showing the relationship between the bearing, the fiberscope, and the guide pin.

FIG. 8 is a side view showing an embodiment of the motor holding device of the present invention.

FIG. 9 is a partial cross-sectional side view showing another embodiment of the inspection device body.

FIG. 10 is a front view of FIG.

[Explanation of symbols]

 1 Inspection device 2 Inspection device main body 3 Electric motor holding device 5 Drive shaft 6 Bearing part 7 Electric motor locking device 8 Detection device 17 Cylinder mounting member 30 Socket 31 Electric motor shaft 33 Lock member 36 Air cylinder 37 Fiberscope 38 Guide pin 41 Bearing 42 Roller 44 Pallet 47 Jack frame 48 Electric motor

Claims (2)

[Claims] Claim: What is claimed is: 1. An axis of a drive shaft which is rotatably supported by a bearing unit provided on an upper portion of a trolley and is rotatable by a drive unit, and an axis of an electric motor shaft on which an electric motor bearing to be inspected is mounted. After that, the drive shaft is advanced to the electric motor shaft side, the electric motor shaft lock device provided at the electric motor side end portion of the drive shaft is engaged with the electric motor shaft, and the detection device provided in the bearing portion is moved by the moving mechanism to the electric motor. While moving to the bearing side, this detection device is swung by the swivel device and the fiberscope and the guide member provided in the detection device are inserted between the rolling elements of the motor bearing to be inspected to inspect the motor bearing. A method for inspecting a motor bearing, which is characterized in that 2. A drive shaft, which is rotatably supported by a drive device and is rotatably supported by a bearing portion provided on an upper portion of the bogie, and an electric motor shaft locking device which is provided at an end portion of the drive shaft on the electric motor side.
An electric motor provided with a fiber scope and a guide member provided on the bearing portion, and provided with a detection device that is movable in the axial direction of the electric motor shaft by a moving mechanism and can be swung by a turning device. Bearing inspection device.