JP2001296213A - Outer wheel rotating device for non-disassembling inspection of rolling stock journal bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer wheel rotating device for journal bearings, capable of reliably detecting only the vibration generated by a roller in a non-assembling inspection by the vibration inspection of the journal bearings. SOLUTION: This outer wheel rotating device is provided with a positioning mechanism 13 fixing a wheel set 5 and outer wheel rotating mechanisms 22, which are installed on both sides in the axial direction of the positioned wheel set 5 and crimping rotors to the outer wheels 3 of the journal bearings 1 fitted to both ends of the wheel set to apply rotation to the outer wheels 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer ring rotation of a journal bearing suitable for judging the degree of damage of a roller of a journal bearing which is fitted to journals at both ends of a wheel axle of a railway vehicle without disassembly by vibration inspection. Related to the device.

[0002]

2. Description of the Related Art As shown in FIG. 5, this type of journal bearing 1 is a roller bearing in which cylindrical rollers 4 are arranged in a double row between an inner ring 2 and an outer ring 3, and both ends of a wheel shaft 5 are provided. The inner ring 2 is fitted to and attached to the journal portion 6 of the above.

[0003] Since the journal bearing 1 is an important part for transmitting the load of the vehicle body to the rotating wheel set 5, it is necessary to always maintain a normal operating state by regular inspection. Conventionally, the journal bearing 1 has been visually inspected by withdrawing the bearing 1 from the journal portion 6 of the wheel axle 5 and disassembling it. Non-decomposition inspections, which detect flaws while attached to the wheelset, have come to be performed.

That is, as shown in FIG. 6, a wheel shaft 5 is placed on a roller, and the outer ring 3 of the journal bearing 1 fitted to the journal portions 6 at both ends thereof is fixed with a V-block or the like, and the pinion gear is mounted. Power belt wrapped around 9
It drives and rotates the wheel set 5 to a required number of rotations. That is, the inner ring 2 (see FIG. 5) of the journal bearing 1 is rotated.
Then, the vibration pickup 11 attached to the end face of the journal portion 6 of the wheel axle 5 detects a vibration in a specific frequency range generated from the roller 4 of the journal bearing 1, and converts the detection signal into a speed or an acceleration. The degree of damage to the roller 4 is determined from the size.

[0005]

However, in the above-mentioned non-disassembly inspection, the obtained discrimination result does not always coincide with the actual degree of damage of the roller 4, and the roller 4 is not actually damaged. In many cases, it is often determined that there is damage, or in fact, even a small damage is a large damage. According to the investigation by the present applicants, the main cause was rotation of the wheel set 5. That is, when the wheel shaft 5 is rotated to obtain the vibration from the roller 4, vibrations in the same frequency range as the roller 4 may be generated from the wheel 12 or the pinion gear 9 fitted thereto. Is detected by the vibration pickup together with the vibration from the rollers.

The present invention has been made to solve such a problem, and a journal in which only the vibration generated by the roller 4 is detected by the vibration pickup 11 in the non-disassembly inspection of the journal bearing. An object is to provide an outer ring rotating device for a bearing.

[0007]

According to the present invention, there is provided a positioning apparatus for fixing a wheelset in a fixed position,
An outer ring rotating mechanism is provided on both sides of the positioned wheel set in the axial direction, and presses a rotating body to the outer ring of a journal bearing fitted to both ends of the wheel set to apply rotation to the outer ring.

In this case, the outer ring rotating mechanism attaches a rotating body to a head plate that moves up and down along the vertical frame,
When the head plate is lowered, it is preferable that the rotating body comes into contact with the outer ring of the journal bearing, and the entire weight of the head plate is added to the outer ring via the rotating body. In addition, it is preferable to use a rubber tire having as little mechanical vibration to the rotating part as possible for improving the detection accuracy of the vibration inspection. Furthermore, the positioning mechanism has a structure provided with a mechanism for rotating the wheel axle, so that damage to the inner ring of the journal bearing can be detected by a vibration test.

[0009]

1 to 4 show an example of an apparatus embodying the present invention. Reference numeral 13 denotes a positioning mechanism for fixing the wheel shaft 5 at a fixed position, and reference numerals 22 and 22 denote outer ring rotating mechanisms.

That is, the positioning mechanism 13 comprises a base 16 which is raised and lowered by a hydraulic cylinder 15 installed between the transport rails 14 of the wheel set 5, and two front and rear parallel members mounted on the upper surface of the base 16 in a direction perpendicular to the rail 14. Shaft 17a,
17b, and a total of four rollers 18a, 18a, 18b, 18b and the like attached to the left and right ends of each shaft. Then, when the base 16 is raised, the rollers (18a, 18b) (18a, 18b) attached to the same end of the two shafts 17a, 17b are respectively conveyed as shown by imaginary lines in FIG. The flanges of the left and right wheels 12, 12 of the wheel set 5 located on the rails 14, 14 are contacted from below to fix the movement of the wheel set 5 like a V-block.

A gear motor 19 is provided between the shafts 17a and 17b so as to mesh with these shafts.
a, 18a, 18b, and 18b rotate in the same direction to rotate the positioned wheel set 5. Further, as shown by the imaginary line in FIG. 4, the transport rails 14 and 14 have portions 14 ′ and 1 located on the side of the positioning mechanism 13.
4 ′ has a joint 21 structure that can be lifted in an inclined manner by the hydraulic cylinder 20, so that the wheel set 5 after the inspection is completed can be easily carried out of the positioning mechanism 13.

On both axial sides of the positioned wheel set 5,
The outer ring rotating mechanisms 22 of the journal bearing 1 are installed. These outer ring rotating mechanisms 22 and 22 include a vertical frame 23 and a head plate 2 that moves the vertical frame 23 up and down along a guide 25 by operating a hydraulic cylinder 24.
6. A rotating body 27 and a shaft 28 and a V-belt 29 are attached to the head plate 26.
A power 30 or the like for imparting rotation via the
When the head plate 26 is lowered, the peripheral surface of the rotating body 27 comes into contact with the peripheral surface of the outer ring 3 of the journal bearing 1, and the total weight of the head plate 26 (set to 300 kg in the illustrated example) via the rotating body 27. The outer ring 3
Is added. The rotating body 27 includes the outer ring 3
It is better to have as little mechanical vibration as possible due to contact with
In the illustrated example, a rubber tire for an automobile is used.

On the rear side of the vertical frame 23, an air cylinder 31 in which the tip of a rod 31 'is fixed to a head plate 26 is attached. The air cylinder 31 is for adjusting the weight of the head plate 26 added to the outer race 3 to a set amount (300 kg).

In order to use the apparatus having the above-described structure, the wheel set 5 is loaded onto the base 16 of the positioning mechanism 13 by the transport rails 14 and 14. Then, the base 16 is connected to the hydraulic cylinder 1
5, and the rollers (18a, 18b) (18a, 1) are respectively attached to the flange portions of the left and right wheels 12, 12 of the wheel set 5.
8b) is brought into contact. Thereby, the movement of the wheel set 5 is fixed. Vibration pickups 11 for vibration measurement are attached to the left and right ends of the wheel set 5.

Next, when the head cylinder 26 is lowered along the vertical frame 23 by operating the hydraulic cylinder 24 of the outer ring rotating mechanisms 22, 22, the head plate 26 rotates on the outer ring 3 of the journal bearing 1 fitted to both ends of the wheel shaft 5. As the body 27 comes into contact, the entire weight of the head plate 26 is added via the rotating body 27. At this time, when the total weight of the head plate 26 added to the outer race 3 exceeds the set amount (300 kg), the air cylinder 31 is operated to adjust it.

Next, when the power 30 is driven to rotate the rotating body 27, the outer ring 3 of the journal bearing 1 that comes into contact with the rotating body 27 starts rotating. The rotation speed of the outer ring 3 is controlled by the power 30 of the rotating body 27, and the rotation is initially performed at a low speed, and the rotation speed is gradually increased. Then, when the rotation speed of the outer ring 3 becomes about 1000 rpm corresponding to the actual operating speed, a vibration inspection of the roller 4 by the vibration pickup 11 is performed, and the inspection value is recorded.

When the vibration test of the roller 4 is completed, the rotating body 2
After the power 30 is controlled to gradually decrease the rotation speed of the outer wheel 3, the driving of the power 30 is stopped. When the rotation of the outer ring 3 is completely stopped, next, a vibration test of the journal bearing 1 and the inner ring 2 is performed. That is, the rollers (18a, 18b) (18a, 18b) that drive the gear motor 19 of the positioning mechanism 13 and fix the wheel set 5 between the two wheels 12,12.
To rotate the wheel set 5. Thus, the vibration pickup 11 detects the damage vibration generated from the inner ring 2 of the journal bearing 1 generated while the wheel shaft 5 makes one rotation.

When the vibration inspection of the roller 4 and the inner ring 2 of the journal bearing 1 is completed in this way, the rotating body 27 pressed against the outer ring 3 of the journal bearing 1 is raised to its original position. Next, the vibration pickup 11 is removed from both ends of the wheel set 5, and the base 16 of the positioning mechanism 13 is lowered to release the fixation of the wheel set 5 by the rollers (18a, 18b) (18a, 18b). When the hydraulic cylinder 20 is operated to incline the part 14 ', 14' of the transfer rail,
The inspected wheel set 5 is carried out of the positioning mechanism 13.

[0019]

As described above, according to the apparatus of the present invention, in the non-disassembly inspection of the journal bearing by vibration inspection, the outer ring of the journal bearing fitted to the wheel shaft is rotated to reduce the damage vibration generated by the rollers. Because it was detected,
Compared to this type of conventional vibration inspection that rotates the inner ring of the journal bearing, there is no extra vibration from the pinion gear or wheels fitted to the wheel axle, and only the damaged vibration generated from the rollers is reliably detected. Can be detected. Therefore, the inspection accuracy of the non-decomposition inspection can be greatly improved. Further, the size of the apparatus is small, and the apparatus can be installed using a small space.

[Brief description of the drawings]

FIG. 1 is a front view showing a device of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a sectional view illustrating the structure of a journal bearing.

FIG. 6 is a plan view for explaining a conventional vibration inspection of a journal bearing by rotation of an inner ring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Journal bearing 2 Inner ring 3 Outer ring 5 Wheel shaft 13 Positioning mechanism 22 Outer ring rotation mechanism 23 Vertical frame 24 Hydraulic cylinder 26 Head plate 27 Rotating body 30 Power

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Fukumoto 5-1-1109, Shimaya, Konohana-ku, Osaka-shi, Japan Sumikin Kansai Industry Co., Ltd. (72) Osamu Arato 5-cho, Shimaya, Konohana-ku, Osaka-shi, Osaka No. 1-109 Sumikin Kansai Kogyo Co., Ltd. (72) Inventor Tetsuya Kawakami 5-1-1 Shimaya, Konohana-ku, Osaka-shi, Osaka-shi Sumikin Kansai Kogyo Co., Ltd. (72) Inventor Yoshinobu Inazushi Shibata, Kita-ku, Osaka-shi 2-4-2-24 West Japan Railway Company (72) Inventor Masao Yoshiya 2-4-2-24 Shibata Kita-ku, Osaka-shi, Osaka West Japan Railway Company (72) Inventor Yasushi Fujii Hyogo 1-8 Fuso-cho, Amagasaki-shi F-term in Sumitomo Metal Technology Co., Ltd. (reference) 2G024 AC02 BA21 CA13 3J101 AA13 AA24 AA32 AA43 AA52 AA62 FA24 GA02

Claims (4)

[Claims] 1. A positioning mechanism for fixing a wheel axle in a fixed position, and a rotating body attached to an outer ring of a journal bearing mounted on both axial sides of the positioned wheel axle and fitted at both ends of the wheel axle to press the rotating body onto the outer ring. An outer ring rotating device for non-disassembly inspection of a journal bearing for a railway vehicle, comprising an outer ring rotating mechanism for imparting rotation. 2. An outer ring rotating mechanism comprises: a rotating body attached to a head plate that moves up and down along a vertical frame; and when the head plate is lowered, the rotating body contacts an outer ring of a journal bearing and passes through the rotating body. The outer ring rotating device for non-disassembled inspection of a journal bearing for a railway vehicle according to claim 1, wherein the entire weight of the head plate is added to the outer ring. 3. A vibration pickup mounted on an end surface of a wheel axle by using a rubber tire or the like that has as little mechanical vibration to a rotating part as a rotating body. The outer ring rotating device for non-disassembly inspection of a journal bearing for a railway vehicle according to claim 1 or 2, wherein the outer ring rotating device is detected. 4. The positioning mechanism has a mechanism for rotating the wheelset at a fixed position. When the wheelset is rotated while the rotating body is pressed against the journal bearing outer ring of the positioned wheelset without rotating, the inner ring of the journal bearing is rotated. The outer ring rotating device for non-disassembled inspection of a journal bearing for a railway vehicle according to claim 1, wherein the outer ring rotating device has a structure capable of detecting vibration generated from the bearing.