JPH10252749A - Rolling bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a trouble caused by a creep by continuously changing the thickness of the outside face of an annular plate in the peripheral direction, and fitting a displacement detector to an irrotational member to face the plate outside of it. SOLUTION: When the frictional force in a bearing becomes larger than the frictional force between the outer diameter of an outer ring 1 and a housing 6, a creep of the outer ring 1 occurs. An annular plate 8 for detecting the creep of the outer ring 1 starts to be rotated together with the outer ring 1, and the gap between a displacement detector 9 and the plate 8 is continuously changed because the outside face 8a of the plate 8 facing the displacement detector 9 is continuously changed in thickness in the peripheral direction. This change quantity is monitored by the displacement detector 9, and the creep state of the outer ring 1 is continuously and surely monitored with high accuracy. An inching creep phenomenon and the momentary creep speed can be detected, and a trouble caused by the creep can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing device capable of monitoring a creep condition of a fixed ring (outer ring or inner ring) of the rolling bearing device.

[0002]

2. Description of the Related Art Conventionally, as a method of monitoring the creep condition of a fixed ring (outer ring or inner ring) of a rolling bearing device, an appropriate number of reflective tapes are attached to an end face of the fixed ring,
Install a visible light reflection type rotation detector to face it,
When the fixed wheel is creeped, the state of creep is monitored by detecting, as a pulse, reflected light when the reflective tape pasted on the end face of the fixed wheel passes through the visible light projecting portion.

Further, as another conventional technique, a protrusion is provided on an end face of a fixed ring (outer ring or inner ring), and when a creep occurs, the protrusion is provided by a proximity sensor or a displacement sensor installed so as to face the protrusion. Alternatively, creep may be monitored by detecting a pulse when passing the displacement sensor position.

[0004]

However, in the prior art, when creep occurs in the fixed wheel (outer ring or inner ring), an intermittent pulse signal causes a dimensional creep phenomenon and an instantaneous creep speed. It is impossible to detect creep at a part where the bearing is used where creep is a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to monitor creep at a used portion where bearing creep is a problem with high accuracy and to generate the creep by creep. An object of the present invention is to provide a rolling bearing device for preventing a bearing trouble from occurring.

[0006]

Means for Solving the Problems To achieve the above object, the technical means of the present invention is to provide an outer ring and an inner ring, a rolling element interposed between the outer ring and the inner ring, and a holding mechanism for holding the rolling element. A grease-enclosed rolling bearing having a grease-enclosed seal and a grease-enclosed seal, the grease-enclosed seal is provided with one end fixed to the fixed wheel side, or one end is mounted outside the grease-enclosed seal on the fixed ring side. An annular plate is provided fixed to the grease sealing seal or the thickness of one of the outer surfaces located outside the annular plate is continuously changed in the circumferential direction. At the outer side of the grease filling seal or the annular plate, the seal or the plate is attached to the non-rotating member so as to face the seal or the plate, and the fixed ring is cleared. Is to have a displacement detector which allowed to measure the gap between the seal or plate changes when up.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rolling bearing device according to the present invention will be described below with reference to the drawings. 1 to 5
Is an embodiment in which the present invention is applied to a grease enclosed type cylindrical roller bearing. FIG. 1 shows an example in which an outer ring is a fixed wheel, and an annular plate for creep detection is attached to an end face of the outer ring. FIG. ) Shows a front view, (c) shows a right side view, and (d) shows a rear view. FIG. 3 shows another embodiment of the annular plate, in which (a) is a right side view (a left side view is symmetrical),
(B) shows a front view.

In FIG. 1, reference numeral 1 denotes a flanged outer ring, and 2 denotes an inner ring. A single row of cylindrical rollers 3 as rolling elements is held by a retainer 4 between the outer ring 1 and the inner ring 2. Reference numeral 5 denotes a grease sealing seal fixed to the outer ring 1. Reference numeral 6 denotes a housing, 7 denotes a shaft, 8 denotes an annular plate for creep detection mounted on the end face of the outer race 1, and 9 denotes a displacement detector provided on the non-rotating member so as to face the annular plate 8.

In the present invention, the outer ring 1, the inner ring 2, the rolling elements 3, the retainer 4, and the grease enclosing seal 5 can be of a known structure, and therefore, they will be particularly described herein. Is omitted.

In the annular plate 8, the thickness of the outer surface 8a continuously changes in the circumferential direction (FIGS. 2A to 2D).
reference). That is, the point A shown in FIG. 2 (b) indicates the thickest part, and is continuously thinned in the direction of the arrow. The annular plate 8 is fitted to the groove 1a provided in the end surface of the outer ring 1 with a tight fit outside the grease enclosing seal 5 provided with one end fixed to the outer ring 1 so as not to fall off. It is arranged.

The annular plate 8 may be constructed as shown in another embodiment shown in FIG.
There is no limitation as long as the thickness is continuously changed in the circumferential direction, and the thickness can be changed within the scope of the present invention. In the embodiment of FIG. 3, on the outer surface 8a,
The points B and D are the thickest parts, respectively, and the points C and E indicate the thinnest parts, respectively. Thick,
Then, it becomes thin continuously from the point D to the point E, and becomes continuously thick from the point E to the point B (FIG. 3).
(See (a) and (b)). In this case, the change state of the plate thickness is between the points (for example, point B to point C,
(Points C to D) are inclined in a plan view or arcuate in a plan view.

The displacement detector 9 is held outside by the flange 6a at one end of the housing (non-rotating member) 6 so as to face the outer surface 8a of the plate 8 outside the annular plate 8. The gap between the ring-shaped plate 8 which changes when the wire creeps is measured.

FIG. 4 shows an embodiment in which the inner ring is a fixed ring, and an annular plate 8 for creep detection is fitted in a groove 2a provided on the end face of the inner ring 2 with an interference. In this case, the displacement detector 9 is held by a holder 7 a provided on a part of the outer periphery of the shaft (non-rotating member) 7 and faces the outer surface 8 a of the annular plate 8. In the present embodiment, the annular plate 8 is configured such that the inner diameter of the annular plate 8 shown in FIG. 2 is small, and the outer surface 8a has the same shape as the outer surface 8a shown in FIG. However, similarly to the above-described embodiment in which the outer ring 1 is a fixed ring, the shape may be the same as the outer surface 8a of the annular plate 8 shown in FIG. 3, and changes within the scope of the present invention are free.

FIG. 5 shows an example in which the outer ring is a fixed ring, in which an annular plate 8 for detecting creep is mounted on the outer surface 5a of the grease sealing seal 5.
The mounting of the plate 8 may be integrated with the adhesive or the seal 5 in some cases. In this case, the displacement detector 9 is shown in FIG.
A flange 6a provided at one end of the housing 6
And is opposed to the outer surface 8 a of the annular plate 8. In this embodiment, the annular plate 8 is used.
Is an annular plate 8 shown in FIG. 2 in which the inner diameter of the annular plate 8 is made small. The outer surface 8a has the same shape as the outer surface 8a shown in FIG. Similar to the above-described embodiment, the shape of the outer surface 8a of the annular plate 8 shown in FIG. 3 may be the same, and changes within the scope of the present invention are free.

In each of the above embodiments, an example has been shown in which the change in the gap between the outer surface 8a of the annular plate 8 and the displacement detector 9 is measured to detect the creep of the fixed wheel (the outer ring 1 or the inner ring 2). However, the present invention is not limited to this, and the thickness of the outer surface of a well-known grease sealing seal provided with one end fixed to the fixed ring (outer ring 1 or inner ring 2) is continuously formed in the circumferential direction. The same operation and effect can be obtained even if the configuration is changed so as to measure the change in the gap between the outer surface of the grease sealing seal and the displacement detector to detect the creep of the fixed wheel. (Not shown). Further, in this case, it goes without saying that the displacement detector is provided at a position facing the outer surface of the grease sealing seal whose plate thickness continuously changes in the circumferential direction. By doing so, creep detection of the fixed wheel can be performed without separately providing the annular plate 8, and the cost is low. The outer surface of the grease sealing seal is not limited as long as the thickness of the seal changes continuously in the circumferential direction, but the outer surface of the annular plate 8 shown in FIGS. Outer surface 8a
The shape may be such that the thickness is continuously changed in the circumferential direction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will now be given of the embodiment shown in FIG. 1 (when the fixed wheel is the outer wheel 1).

When the frictional force in the bearing becomes larger than the frictional force between the outer diameter of the outer race 1 and the housing 6, creep of the outer race 1 occurs. When the outer race 1 starts creeping, the annular plate 8 for creep detection attached to the outer race 1 also starts rotating integrally with the outer race 1. Outer side surface 8a of annular plate 8 for creep detection facing displacement detector 9
However, since the plate thickness changes continuously in the circumferential direction,
As the outer ring 1 creepes, the gap between the displacement detector 9 and the annular plate 8 changes continuously. By monitoring the amount of change with the output of the displacement detector 9, the creep condition of the outer race 1 can be continuously monitored.

FIGS. 6 and 7 show changes in the gap between the annular plate 8 for detecting creep and the displacement detector 9 due to the occurrence of outer ring creep. FIGS. 6 and 7 show the case where the gap between the annular plate 8 for creep detection and the displacement detector 9 at the time of non-creep is set to a minimum.

FIG. 6 shows a state where no creep has occurred and a state where creep has occurred continuously. Zone I is a state where no creep has occurred and no change in the gap is observed. Zone II is a state where creep is occurring at a relatively high speed and a constant speed, and the gap is continuously changing. Zone III is in a state where creep is occurring at a relatively low speed and at a constant speed, and the gap is continuously changing like zone II.

From the relationship between the time T ₂ , T _{3 for} one revolution of the creep in zone II and zone III, or the amount of change in the clearance per unit (the amount of movement of the outer ring) ΔH / ΔT, the housing 6 and the outer diameter of the outer ring 1 are determined. It is possible to detect the sliding speed of the bearing, and it is possible to predict the trouble of the bearing from the sliding speed.

FIG. 7 shows a state in which the outer ring creep occurs in a stick-slip manner. Even in this case, it is possible to detect the instantaneous sliding speed.

Although not particularly described here, the same results as the measurement results of the embodiment of FIG. 1 are obtained in the embodiments of FIGS.

[0023]

According to the rolling bearing device of the present invention, the thickness of the surface facing the displacement detector is continuously changed in the circumferential direction on the end surface of the fixed ring (outer ring or inner ring) or the outer surface of the grease sealing seal. By mounting the changed annular plate for creep detection, or by continuously changing the thickness of the surface of the grease sealing seal facing the displacement detector directly in the circumferential direction. The gap between the displacement detector provided on the rotating member and the displacement detector can be continuously measured with high accuracy. Therefore, it is possible to monitor the creep condition of the bearing with high accuracy and reliability, and it is possible to prevent the trouble of the bearing caused by the creep beforehand. That is, it is possible to detect a dimensional creep phenomenon and an instantaneous creep speed, and it is possible to provide a rolling bearing device suitable for monitoring creep in a used portion of the bearing where such creep is a problem.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a case where an annular plate is fixed to an outer ring in one embodiment of the rolling bearing device of the present invention.

FIG. 2 shows an embodiment of an annular plate used in the rolling bearing device of the present invention, wherein (a) is a left side view, (b) is a front view, (c) is a right side view, and (d) is a rear view. The figure is shown.

FIG. 3 shows another example of an annular plate,
(A) is a left side view, and (b) is a front view.

FIG. 4 is a longitudinal sectional side view showing another embodiment of the rolling bearing device of the present invention, in which an annular plate is fixed to an inner ring.

FIG. 5 is a vertical sectional side view showing another embodiment of the rolling bearing device of the present invention, in which an annular plate is fixed to a grease-sealed seal.

FIG. 6 is a diagram showing a measurement result of a gap change.

FIG. 7 is a diagram showing a measurement result of a gap change.

[Explanation of symbols]

1: Outer ring 2: Inner ring 3: Cylindrical roller 4: Cage 5: Seal for grease filling 6: Housing 7: Shaft 8: Annular plate 8a: Outer surface 9: Displacement detector

Claims (1)

[Claims] 1. A grease-enclosed type rolling bearing having an outer ring and an inner ring, a rolling element interposed between the outer ring and the inner ring, a retainer for holding the rolling element, and a grease-sealing seal. A grease sealing seal is provided fixed to the fixed wheel side, or an annular plate having one end fixed to the fixed wheel side outside the grease sealing seal is provided, and the grease sealing seal or the annular shape is provided. The thickness of any one of the outer surfaces located on the outside of the plate is continuously changed in the circumferential direction, and the outside of the grease sealing seal or the annular plate is opposed to the seal or the plate. Attached to the non-rotating member and measured the clearance between the seal and the plate, which changes when the fixed wheel creeps. And a displacement detector.