JPH049457Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Field of Application of the Technology" The present invention relates to an improvement of a fixing device for an axle bearing incorporated in a railway vehicle.

``Prior Art'' As shown in FIG. 3, in the conventional axle bearing fixing device, a front cover 3 is screwed into a threaded portion 2 provided at the end of an axle 1. A small cover 5 covering the end surface 4 of the axle is fixed with bolts 6, and a double-row roller bearing 7 fixed to the axle 1 is mounted in the center of the small cover 5.
A grease nipple 8 was installed to supply grease inside.

Incidentally, the outer peripheral surface of the wheel, which wears out during vehicle operation, is regularly milled, but in order to mill the wheel, it is necessary to expose the center hole 9 provided in the end surface 4 of the axle. In order to expose the center hole 9, it is tedious to loosen the bolt 6 and remove the small lid 5.

In addition, inspection to determine whether or not cracks have occurred in the axle 1 is carried out regularly using ultrasonic flaw detection, but in order to perform axle flaw detection, the end face 4 of the axle must be completely exposed. It is necessary to remove what protrudes outward in the axial direction from the end face 4 of the axle because of the axle flaw detection device, and in order to perform axle flaw detection, it is a troublesome task to remove the small cover 5 and the front cover 3. Ru.

Furthermore, since the grease nipple 8 is fixed to the center of the small lid 5, when performing wheel milling and axle flaw detection, the grease flow passage 10 for replenishing grease into the double-row roller bearing 7 is exposed. There is a risk that foreign matter such as chips may enter the inside of the machine.
(Refer to Japanese Utility Model Publication No. 58-20454) Therefore, in order to solve the problem of the fixing device for the axle bearing, a side wall on the shaft end side of the axle 21 is attached to the shaft end as shown in FIG. An axially threaded hole 41a is provided in the locking member 41, which has an annular groove 37 with an axial direction, and has a protruding portion 41b that engages with the side wall of the groove 37, and an axially threaded hole 41a is provided in the second presser member 42. A bolt insertion hole 43 is provided, and the protruding portion 41b of the locking member 14 is placed in a position where it engages with the groove 37, so that the bolt 44 is inserted into the second holding member 4.
The second holding member 42 is screwed into the screw hole 41a of the locking member 41 through the second bolt insertion hole 43.
By fastening the locking member 41 to the inner ring 22, the inner ring 22 is held in the first position by the pressing force from the second holding member 29.
fixed to the shaft end between the presser member 29 and the rear cover 26,
and the side wall 39 on the opposite shaft end side of the groove 37 when fixed.
It has been proposed that a space 46 is formed at least one between the protruding portion of the locking member 41 and the second presser member 42 and the surface facing the locking member 41. . (Japanese Utility Model Publication No. 59-29424) However, in this fixing device, the built-in upper locking member 41
must be divided into many segments circumferentially.

Therefore, when assembling, the screw hole of the locking member 41 and the bolt insertion hole 4 of the front cover (second holding member 42)
It is difficult to assemble, as it takes time and effort to align the parts 3 and 3.

Further, since the locking member 41 is a segment, there is no means to prevent the diameter of the segment from expanding due to vibrations and centrifugal force, so there is a risk that the locking member 41 may deviate from the annular groove 37, which is extremely dangerous.

``Purpose of the invention'' The technical problem of the invention is to provide an easy means for pressing the inner ring toward the opposite end of the shaft and fixing it in place, and to prevent the retaining ring from expanding in diameter after fixing and to prevent it from falling off. To provide a practical axle bearing fixing device that is easy to maintain and manage because it is formed in a collar.

"Structure of the invention" The structure of the invention, that is, the technical means for solving the above technical problem, is as follows.

The inner ring of the vehicle bearing is provided on the axle between a holding member disposed on the shaft end side of the axle and a positioning member disposed on the opposite shaft end side of the axle. a circumferential groove; a split retaining ring that fits into the circumferential groove; a collar that abuts a side surface on the shaft end side and has a plurality of screw holes in the axial direction; and a bolt that is arranged at a position opposite to the collar in the axial direction with respect to the retaining ring and that corresponds to the screw holes. It consists of a front cover that has an insertion hole and comes into contact with the end surface on the shaft end side of the presser member, and a bolt that is inserted through the bolt insertion hole and screwed into the screw hole. A fixing device for a vehicle bearing that presses a lid to fix the inner ring to an axle, wherein the collar has a protrusion that protrudes from a side surface on the shaft end side of the collar toward the shaft end, and the inner diameter of the protrusion In the axle bearing fixing device, the outer diameter of the retaining ring is made larger than the outer diameter of the retaining ring to prevent expansion of the diameter of the retaining ring.

``Effect of the invention'' With the above-mentioned configuration, when assembling and disassembling the retaining ring and collar of the axle bearing, the disassembled retaining ring is set and the collar is pulled back, thereby eliminating the overhang of the stepped portion of the collar. This allows the retaining ring to be held down.

Therefore, the retaining ring effectively prevents the diameter from expanding.
Additionally, the split collar can be set without using any installation jigs.

Therefore, it is very easy to attach and remove the front cover, and the axle can be sufficiently detected, making it extremely practical.

Furthermore, since the double-sided stepped collar is symmetrical, there is no need for directionality when assembling it.

In addition, there is no particular difficulty in manufacturing the retaining ring and collar (segment-shaped retaining member), and even though they are two members, they can be provided at low cost, and the present invention has an advantageous effect unique to the present invention.

``Embodiment'' An embodiment of the present invention will be described below in detail with reference to FIGS. 1 and 2 of the accompanying drawings.

FIG. 1 is a sectional view of an axle bearing fixing device according to an embodiment of the present invention.

Note that only the upper half of this device along the axis of the axle is illustrated, and the lower half is omitted from illustration and explanation because it has a symmetrical structure.

FIG. 2 is an enlarged longitudinal sectional view of the main part of FIG. 1.

101 is a metal case 10 with oil seals 102 and 103 for sealing the bearings on the inner surfaces of both ends thereof.
4, 105 is the fixed outer wheel, 106 is the axle 10
Inner ring fixed to 7 by interference fit, 10
8 and 109 are cages 1081 and 1091, respectively.
This is a cylindrical roller that is held and guided by the

The outer ring 101 has a fixed collar 110 that guides the cylindrical rollers 108, 109 only in the center of its inner circumferential surface and receives a thrust load, and has no ribs formed on either end thereof.

The inner ring 106 has the cylindrical roller 108 on the opposite end side,
It has a fixed collar 111 that is integral with the inner ring 106 that guides the outer ring 109 and receives a thrust load, has a pressing member 112 on the shaft end side, and has a roller guide gap at a position facing the fixed collar 110 of the outer ring 101. seat 11
Fit 3.

The thrust load applied to the inner ring 106 toward the shaft end causes the groove width of the roller row between the fixed collar 110 of the outer ring 101 and the fixed collar 111 of the inner ring 106 to be smaller than the groove width of the roller row on the shaft end side. Then, it is received by the cylindrical rollers 108 of the roller row on the opposite end side.

Of the oil seals 102 and 103, the metal case 104 of the oil seal 102 on the opposite shaft end side is fixed to the stepped portion of the outer ring 101 on the opposite shaft end side, and the oil seal 102 is in contact with the outer peripheral surface of the positioning member 114. .

On the other hand, the metal case 1 of the oil seal 103
05 is fixed to the stepped portion on the shaft end side of the outer ring 101, and the oil seal 103 is in contact with the outer peripheral surface of the cup-shaped holding member 112.

The positioning member 114 is located on the opposite end surface of the inner ring 106 and is fitted onto the axle 107, and is in contact with the stepped portion 1071 of the axle 107 and the end surface of the inner ring 106 on the fixed collar 111 side, and is attached to the shaft end. The thrust load applied to the axle 107 is transferred to the inner ring 10.
Tell 6.

Further, the cup-shaped holding member is located on the shaft end side of the inner ring 106 and is fitted into the axle 107.

115 is a circumferential groove carved in the shaft end 116 of the axle 107, and a split retaining ring 117 is installed in the circumferential groove 115.
The retaining ring 117 prevents the collar 118 loosely fitted to the shaft end 116 from coming off in the direction of the shaft end. A protrusion 1182 protruding toward the shaft end side is formed, and the protrusion 1181,
The inner diameters 1183 and 1184 of the retaining ring 1182 are larger than the outer diameter of the retaining ring 117, that is, the retaining ring 117 has a substantially T-shaped cross section.

The collar 118 has a plurality of screw holes 11 in the axial direction.
85 is formed.

Reference numeral 119 denotes a front cover, which is disposed at a position axially opposite to the collar 118 with respect to the retaining ring 117, and has a plurality of bolt insertion holes 1191 corresponding to the screw holes 1185 of the collar 118. Individually formed. A bolt 120 is inserted into a bolt insertion hole 1191 of the front cover 119 and screwed into the screw hole 1185 with a rotation stopper washer 121 interposed therebetween.

"About operation" First, the positioning member 114, the rolling bearing including the inner ring 106, and the holding member 112 are press-fitted into the axle 107, and then the collar 118 is once fitted into the shaft end 116 up to the side of the holding member 112, and then divided into two parts. Apply oil such as grease to the retaining rings 117, 117, and insert them into the circumferential groove 115. Due to the adhesive force of the grease, the retaining rings 117, 117
is anchored within the circumferential groove 115 without falling down.

The collar 118 is pulled toward the shaft end using the screw hole 1185 of the collar 118. Next, the front lid 119
Attach the bolt insertion hole 1191 and collar 11.
Align the screw holes 1185 of No. 8 and tighten the bolts 120.

As a result, the retaining ring 117 is loosely fitted onto the inner diameter of the protruding portion 1181 of the collar, so that the retaining ring 117 comes into contact with the inner diameter 1183 of the protruding portion, that is, the stepped portion.

Furthermore, the bolt 120 is tightened and the reaction force is used to press the holding member 112 toward the opposite end of the shaft.
6 can be securely fixed to the axle.

In order to minimize the axial length of the axle, the distance A between the side surface of the collar 112 and the side surface of the collar 118 is made slightly larger than the axial protrusion amount B of the protrusion 1181.

As mentioned above, the protrusion is formed in the axial direction on the annular collar of the present invention, so that the inner diameter of the protrusion, that is, the stepped portion is formed, so that the stepped portion increases the outer diameter of the retaining ring. The retaining ring 117 has the function of expanding the diameter of the retaining ring 117 and preventing it from falling off, thereby allowing the collar to stop at a predetermined position and perform its fastening function.

Furthermore, as in the above embodiment, if the protrusions are formed symmetrically on the collar, there is an advantage that there is no need to consider the orientation of the collar at the time of assembly.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of an axle bearing fixing device showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of main parts of the device of the present invention, and Figs. 3 and 4 are views of a conventional railway vehicle. It is a sectional view of an axle device. 106...Inner ring, 118...Color, 112...
... Pressing member, 117 ... Retaining ring, 1181 ... Projection.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An inner ring of a vehicle bearing is provided on an axle between a holding member disposed at the end of the axle and a positioning member disposed at the opposite end of the axle, a circumferential groove carved in the shaft end of the axle, a split-type retaining ring fitted into the circumferential groove, and located on the opposite shaft end side of the retaining ring;
a collar that loosely fits into the shaft end, a side surface on the shaft end side abuts a side surface on the opposite shaft end side of the retaining ring, and has a plurality of screw holes in the axial direction; A front cover is disposed at a position opposite to the position of the collar in the axial direction, has a bolt insertion hole corresponding to the screw hole, and comes into contact with the end surface on the shaft end side of the presser member, and the front cover is inserted through the bolt insertion hole, A fixing device for a vehicle bearing, consisting of a bolt that is screwed into a screw hole, and by tightening the bolt, presses the front cover and fixes the inner ring to the axle, wherein the collar is attached to the shaft end of the collar. A fixing device for an axle bearing, which has a protrusion that protrudes from a side surface toward the shaft end, and the inner diameter of the protrusion is larger than the outer diameter of the retaining ring to prevent the retaining ring from expanding in diameter. (2) the collar has a protrusion that is symmetrical with the shaft end side and projects from the side surface of the opposite shaft end side;
The fixing device for an axle bearing according to claim 1, which has a substantially T-shaped cross section.