JP2596454Y2 - Conical roller bearing spacing measurement device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention is directed to a pair of conical roller bearings which are incorporated in a differential carrier of a vehicle and to which a thrust preload is applied, so that the inner end surface distance between inner rings under the thrust preload can be measured. The present invention relates to an apparatus for measuring the distance between conical roller bearings.

[0002]

2. Description of the Related Art In general, when a conical roller bearing is used, a pair of conical roller bearings is often used to face each other. For example, as shown in FIG. 2, a drive pinion shaft c whose one end is rotatably supported in a differential carrier a of the vehicle via a ball bearing b has a predetermined interval at the other end on the drive pinion d side. And is rotatably supported via a pair of conical roller bearings e and f arranged opposite to each other.

Since a large thrust load acts on the drive pinion shaft c, a thrust preload is previously applied to the pair of conical roller bearings e and f. That is, by tightening the torque nut g screwed to one end of the drive pinion shaft c, the drive pinion shaft c
The companion flange h, the inner ring of the ball bearing b,
The inner ring of one conical roller bearing f is pressed to one side in the axial direction via the spacer collar i, and the inner ring of the other conical roller bearing e is pressed and pinched to the opposite side in the axial direction by the drive pinion d. Thrust preload is applied to the pair of conical roller bearings e and f. In this case, in order to set the thrust preload applied to the pair of conical roller bearings e and f to a predetermined value, the drive pinion shaft c is provided with the two conical roller bearings e and f.
A spacer collar j for setting a preload is provided between the inner rings f.

Heretofore, the dimension X of the spacer collar j for setting the preload has a distance between the end faces of the bearing fitting portion of the differential carrier a corresponding to the distance between the inner end faces of the pair of conical roller bearings e and f. L1 (see FIG. 3A)
And a step L2 between the inner end face of the outer ring and the inner end face of the inner ring of the conical roller bearing e and a step L3 between the inner end face of the inner ring and the inner end face of the conical roller bearing f (see FIG. 3B). By subtracting the dimension L4 corresponding to the thrust preload from the sum of these dimensions, calculation was performed from the equation of X = L1 + L2 + L3-L4.

[0005]

By the way, in the conventional example in which the dimension X of the spacer collar j for setting the preload is calculated in this manner, the distance L1 between the end faces of the bearing fitting portion of the differential carrier a and the conical roller bearing e are used. It is necessary to measure a step L2 between the inner end face of the outer race and the inner end face of the inner race and a step L3 between the inner end face of the outer race and the inner end face of the inner race of the conical roller bearing f. Accumulates, and the dimension X of the spacer collar j cannot be obtained accurately.

The dimension X of the spacer collar j obtained by the calculation is not the distance between the inner end faces of the inner races when the thrust preload is actually applied to the pair of conical roller bearings e and f. Even if it is accurate, there is a problem that reliability is low.

Accordingly, the present invention is intended for a pair of conical roller bearings which are incorporated in a differential carrier of a vehicle and are provided with a thrust preload according to use conditions, and can measure the inner end face distance between inner rings under the thrust preload. It is an object of the present invention to provide a conical roller bearing interval measuring device that enables the dimensions of the spacer collar and the washer for setting the thrust preload to be determined more easily and accurately.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a pair of conical roller bearings for rotatably supporting a drive pinion shaft in a differential carrier. An interval measuring device of a conical roller bearing for measuring an interval between inner end faces of inner rings of a bearing in advance, wherein the interval measuring device is fitted to the inner ring of the first conical roller bearing, penetrates the first and second conical roller bearings, and has one end. A central shaft having a pressing portion abutting on the outer end surface of the inner ring of the first conical roller bearing, and having a screw portion at the other end; an outer periphery of the central shaft;
First and second reference surfaces which are slidably fitted to the inner ring of the conical roller bearing, and which can abut one end on the inner end surfaces of the inner rings of the first and second conical roller bearings respectively and form a predetermined reference interval. A spacing tube having a measurement surface at the other end thereof, and a press fitting the outer periphery of the spacing tube so that the spacing tube can slide, and having one end contacting the outer end surface of the inner ring of the second conical roller bearing. Department
The first and second conical rollers are provided with an operation hole that enables the interval tube to slide in the axial direction at the intermediate portion and a measurement hole at the other end, and are screwed forward and backward with respect to the central axis. A thrust collar for holding the inner ring of the bearing between the pressing portion at one end and the pressing portion of the central shaft to apply thrust preload to the first and second conical roller bearings, and is fitted and fixed to the other end of the thrust collar. The measuring tool holding cap includes a measuring tool held by the measuring tool holding cap and a measuring tool that contacts the measurement surface of the interval axis through the measurement hole of the thrust collar.

[0009]

In the distance measuring apparatus of the conical roller bearing of the present invention adopting such means, the outer ring of each of the first and second conical roller bearings is moved together with the conical rollers and the like to the differential carrier mounted at a predetermined position. The other end of the central shaft with the inner ring of the 1 conical roller bearing is inserted from the side of the first conical roller bearing, and one end of the spacing cylinder on which the inner ring of the second conical roller bearing is mounted together with the conical roller, etc. The other end side is slidably fitted and moved to the first conical roller bearing side to
A conical roller bearing and a second conical roller bearing are temporarily assembled. The thrust collar fitted to the outer periphery of the spacing tube is screwed onto the central shaft to make its pressing portion abut the inner ring outer end face of the second conical roller bearing, and the pressing portion of the central shaft is connected to the first conical roller bearing. The first conical roller bearing and the second conical roller bearing are assembled by contacting the outer end surface of the inner ring.

In the assembled state of the first conical roller bearing and the second conical roller bearing, the thrust collar is screwed into the center shaft with a predetermined torque corresponding to the thrust preload to be applied to the first and second conical roller bearings. The pressing portion of the central shaft presses the outer end surface of the inner ring of the first conical roller bearing, and the pressing portion of the thrust collar presses the outer end surface of the inner ring of the second conical roller bearing. Is given a predetermined thrust preload according to the use conditions.

Subsequently, the measuring tool holding cap holding the measuring tool is fitted and fixed to the thrust collar, and the contact of the measuring tool is brought into contact with the measuring surface of the spacing tube through the measuring hole of the thrust collar, thereby obtaining the first and the first. The second conical roller bearing is now ready for measurement of the interval between the inner end faces of the inner races.

In order to measure the distance D between the inner end surfaces of the inner races of the first and second conical roller bearings, first, the outer periphery of the interval tube is grasped from the operation hole of the thrust collar, and is pushed toward one end. The first reference surface is brought into contact with the inner end face of the inner ring of the first conical roller bearing, and in this state, the scale of the measuring tool is adjusted to zero.

Next, the interval cylinder is similarly pushed to the other end to bring its second reference surface into contact with the inner end face of the inner ring of the second conical roller bearing. In this state, the scale of the measuring instrument is read. This read value C is obtained by calculating the distance D between the inner end faces of the inner races of the first and second conical roller bearings and the reference distance L between the first and second reference planes in the spacing cylinder.
Therefore, the distance D between the inner end faces of the inner races of the first and second conical roller bearings is calculated by the equation of D = L + C, and the first and second conical roller bearings are calculated based on the calculated value D. The dimensions of the preload setting spacer collar to be interposed between the inner end surfaces of the inner races or the total size of the spacer collar and the washer are determined.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the accompanying drawings. In FIG. 1 showing the entire structure of a distance measuring device for a conical roller bearing according to one embodiment,
Reference numeral 2 denotes a first conical roller bearing and a second conical roller bearing as objects to be measured for rotatably supporting a drive pinion shaft (not shown) by applying a thrust preload according to use conditions.
A conical roller bearing is shown, and these outer rings 1a and 2a are press-fitted into a predetermined location in the differential carrier 3 so as to face each other at a predetermined interval.

Reference numeral 4 denotes a center axis which penetrates the first conical roller bearing 1 and the second conical roller bearing 2 and has one end facing the vicinity of the first conical roller bearing 1. One end has a large diameter, in which a fitting portion 4a fitted to the inner ring 1b of the first conical roller bearing 1 and an outer end surface 1c of the inner ring 1b are provided.
And a male screw 4c for applying a thrust preload is formed at the other end of the center shaft 4.

Further, reference numeral 5 denotes a hollow cylindrical spacing tube slidably fitted to the outer periphery of the central shaft 4 and the inner ring 2b of the second conical roller bearing 2, and one end thereof has a first conical roller. A large-diameter head 5a located between the bearing 1 and the second conical roller bearing 2 is formed. And in this head 5a,
A first reference surface 5b, which can be brought into contact with the inner end surface 1d of the inner ring 1b of the first conical roller bearing 1, and a second reference surface, which can come into contact with the inner end surface 2c of the inner ring 2b of the second conical roller bearing 2. 2 reference plane 5
c are formed at right angles to the axial direction of the spacing tube 5. The first reference surface 5b and the second reference surface 5c form a predetermined reference interval L shorter than the interval between the inner end surface 1d of the inner ring 1b and the inner end surface 2c of the inner ring 2b. The end face of the other end of the spacing tube 5 has a measurement surface 5d perpendicular to the axial direction.
It has become.

Reference numeral 6 denotes a hollow cylindrical thrust collar 6 fitted to the outer periphery of the spacing tube 5 from the other end so that the spacing tube 5 can slide in the axial direction. A pressing portion 6a is formed on the end face of the second conical roller bearing 2 so as to contact the outer end face 2d of the inner ring 2b. On the peripheral surface of the intermediate portion of the thrust collar 6, a relatively large operation hole 6b for pinching the other end of the spacing tube 5 and sliding the same in the axial direction is opposed to, for example, a diameter direction. Two are formed. Further, a measurement hole 6c is formed at the other end of the thrust collar 6 at a position eccentric from the center and penetrates axially from the end face to face the measurement surface 5d of the spacing tube 5.

At the other end of the thrust collar 6, a female thread 6d is formed at the center thereof to be screwed with the male thread 4c of the central shaft 4, and a hexagonal tool hook is formed on the outer periphery thereof. A portion 6e is formed. When the thrust collar 6 is screwed toward the pressing portion 4b side of the center shaft 4 and advanced using the tool hooking portion 6e, the pressing portion 4b of the center shaft 4 is moved outside the inner ring 1b of the first conical roller bearing 1. Pressing the end face 1c, the pressing portion 6a of the thrust collar 6
By pressing the outer end surface 2 d of the inner ring 2 b of the conical roller bearing 2, a thrust preload can be applied to the first and second conical roller bearings 1 and 2.

On the other hand, a measuring tool holding cap 8 to which a dial gauge 7 as a measuring tool is fixed is fitted and fixed to the other end of the thrust collar 6. The dial gauge 7 has a contact 7a having the measuring hole 6c. And is held so as to come into contact with the measurement surface 5d of the spacing tube 5 through the gap.

Next, the operation of the apparatus for measuring the interval of the conical roller bearing according to the embodiment having the above-described structure will be described with reference to an example of use. First, in order to set the interval measuring device of one embodiment to the differential carrier 3, the outer rings 1a and 2a of the first and second conical roller bearings 1 and 2 are press-fitted and mounted in predetermined positions of the differential carrier 3 in advance. deep. Further, the inner ring 1b of the first conical roller bearing 1 is mounted on the center shaft 4 at its fitting portion 4a together with the conical roller 1e and the like in advance. Further, the inner ring 2b of the second conical roller bearing 2 is previously mounted on the outer periphery of the spacing cylinder 5 on the other end side of the head 5a together with the conical rollers 2e and the like.

Next, the other end of the center shaft 4 is connected to the outer ring 1a of the first conical roller bearing 1 mounted on the differential carrier 3 from the outer ring 1a side of the second conical roller bearing 2 to the outer ring 2a side of the second conical roller bearing 2. 2a so as to penetrate the first
The inner ring 1b of the conical roller bearing 1 is fixed to the first
It is temporarily assembled to the outer ring 1a of the conical roller bearing 1. Center axis 4
The other end of the spacer tube 5 is fitted with one end of the spacer tube 5 and moved through the outer ring 2a of the second conical roller bearing 2 to the outer ring 1a side of the first conical roller bearing 1 so that the distance tube 5 becomes the center shaft. In this state, the inner ring 2b of the second conical roller bearing 2 is temporarily assembled with the outer ring 2a of the second conical roller bearing 2 together with the conical rollers 2e and the like.

Subsequently, a thrust collar 6 is fitted to the outer periphery of the spacing cylinder 5 from the other end side, and a female screw portion 6d at the other end is provided.
Is screwed into the male screw portion 4c of the center shaft 4, and a tool such as a spanner is hung on the tool hooking portion 6e to cause the thrust collar 6 to advance toward the second conical roller bearing 2, so that the pressing portion 6a at one end portion is pressed. The outer peripheral surface 2d of the inner ring 2b of the two conical roller bearings 2 is brought into contact with the outer end surface 1c of the inner ring 1b of the first conical roller bearing 1 so that the pressing portion 4b of the central shaft 4 is brought into contact therewith. And the assembly of the second conical roller bearing 2 is completed.

In a state where the assembly of the first conical roller bearing 1 and the second conical roller bearing 2 is completed, a thrust preload according to a use state is applied to the first conical roller bearing 1 and the second conical roller bearing 2. , Tool holder 6e of thrust collar 6
A thrust collar 6 is screwed into the center shaft 6 with a predetermined torque corresponding to the thrust preload to be applied by using a tool such as a torque wrench. Then, the pressing portion 4b of the central shaft 4 presses the outer end surface 1c of the inner ring 1b of the first conical roller bearing 1, and the pressing portion 6a of the thrust collar 6 presses the outer end surface 2d of the inner ring 2b of the second conical roller bearing 2. By doing so, a predetermined thrust preload according to use conditions is applied to the first conical roller bearing 1 and the second conical roller bearing 2.

Therefore, as a preparation for the measurement, a measuring instrument holding cap 8 holding the dial gauge 7 is fitted and fixed to the thrust collar 6, and the contact 7 a of the dial gauge 7 is passed through the measuring hole 6 c of the thrust collar 6. Measuring surface 5
d.

In measuring the distance D between the inner end faces 1d and 2c of the inner races 1b and 2b of the first conical roller bearing 1 and the second conical roller bearing 2, first, the thrust collar 6 is used.
The outer periphery of the space cylinder 5 is grasped from the operation holes 6b, 6b of the above, and is pushed to one end side so that the first reference surface 5b is brought into contact with the inner end surface 1d of the inner ring 1b of the first conical roller bearing 1. In this state, the scale of the dial gauge 7 is adjusted to zero. Next, the outer periphery of the spacing tube 5 is grasped from the operation holes 6b, 6b of the thrust collar 6, and is pushed toward the other end, so that the second reference surface 5c is moved to the inner end surface of the inner ring 2b of the second conical roller bearing 2. 2c, and the scale of the dial gauge 7 is read in this state.

The read value C of the dial gauge 7 by the above operation is determined by the distance D between the inner end faces 1d and 2c of the inner rings 1b and 2b of the first and second conical roller bearings 1 and 2 and the first value of the distance cylinder 5 , The difference between the reference distance L between the second reference planes 5b and 5c, the distance D to be obtained is calculated by the formula of D = L + C, and the first and second conical rollers are calculated based on the calculated value D. The dimensions of the spacer collar for setting the thrust preload to be interposed between the inner end faces 1d and 2c of the inner races 1b and 2b of the bearings 1 and 2b or the total dimension of the spacer collar and the washer are determined.

Here, when setting a thrust preload by interposing a spacer collar and a washer between the inner end surfaces 1d and 2c of the inner rings 1b and 2b of the first and second conical roller bearings 1 and 2, If the reference interval L between the first and second reference surfaces 5b and 5c of the interval tube 5 is made to match the dimension of the spacer collar,
Since the reading C of the dial gauge 7 directly indicates the thickness of the washer, the washer can be selected very simply and accurately.

As described above, in one embodiment, the reading operation of the dial gauge 7 only needs to be performed once, so that the measuring operation is simple, and since there is only one read value C, the calculation based on this is performed. There is no accumulation of errors, and the size of the spacer collar for setting the thrust preload or the total size of the spacer collar and the washer can be determined more easily and accurately than in the past.

Particularly, the measured value calculated from the read value C obtained by the measuring operation is a state in which a predetermined thrust preload according to the use condition is applied, and therefore, the reliability is extremely high.

Although the dial gauge 7 is used as a measuring tool in the above embodiment, the present invention is not limited to this.

[0031]

As described above, according to the present invention, the distance D between the inner end faces of the inner races of the first and second conical roller bearings in a state where a predetermined thrust preload according to the use conditions is applied is as follows.
Based on the reference distance L between the first and second reference planes in the spacing tube and the readout value C of the measuring tool, it is calculated by the formula of D = L + C, and the calculated value D is used to calculate the first and second conical rollers. The dimension of the spacer collar for setting the thrust preload to be interposed between the inner end faces of the inner races of the bearing or the total dimension of the spacer collar and the washer can be determined to be highly reliable.

In addition, since the reading operation of the measuring tool at the time of measurement only needs to be performed once, the measuring operation is simple, and since there is only one measured value, there is no accumulation of measurement errors in the calculation and the thrust The dimension of the spacer collar for setting the preload or the total dimension of the spacer collar and the washer can be determined more easily and accurately than before.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an entire structure of an embodiment of the present invention.

FIG. 2 is a sectional view of a general differential carrier rotatably supporting a drive pinion shaft showing a pair of conical roller bearings to which an embodiment of the present invention is applied;

FIGS. 3A and 3B are explanatory diagrams showing measurement points for calculating dimensions of a spacer collar for setting a preload.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First conical roller bearing 1a Outer ring 1b Inner ring 1c Outer end face 1d Inner end face 2 Second conical roller bearing 2a Outer ring 2b Inner ring 2c Inner end face 2d Outer end face 3 Differential carrier 4 Center shaft 4a Fitting part 4b Pressing part 4c Male screw part 5 Interval Cylinder 5a head 5b first reference surface 5c second reference surface 5d measuring surface 6 thrust collar 6a pressing portion 6b operating hole 6c measuring hole 6d female thread portion 6e tool hooking portion 7 dial gauge 7a contact 8 measuring tool holding cap

Claims (1)

(57) [Scope of request for utility model registration] 1. A conical roller bearing for a pair of conical roller bearings for rotatably supporting a drive pinion shaft in a differential carrier, wherein a distance between inner end surfaces of inner rings of first and second conical roller bearings is measured in advance. A pressurizing portion that fits into the inner ring of the first conical roller bearing, penetrates the first and second conical roller bearings, and has one end contacting the outer end surface of the inner ring of the first conical roller bearing. And a central shaft having a threaded portion at the other end, and slidably fitted to the outer periphery of the central shaft and the inner ring of the second conical roller bearing, and the first and second conical roller bearings at one end. An interval tube having first and second reference surfaces that can abut against the inner end surfaces of the inner rings and have a predetermined reference interval, and having a measurement surface at the other end; At one end of the second conical roller bearing. A pressing portion that abuts the outer end surface of the wheel, an operation hole that allows the spacing tube to slide in the axial direction at the middle portion, and a measurement hole at the other end portion are screwed into the center axis so as to be able to move forward and backward. A thrust collar for holding the inner rings of the first and second conical roller bearings between the pressing portion at one end and the pressing portion of the central shaft to apply a thrust preload to the first and second conical roller bearings; A measuring tool holding cap fitted and fixed to the other end of the collar; and a measuring tool held by the measuring tool holding cap and having a contact contacting the measurement surface of the spacing tube through the measurement hole of the thrust collar. An interval measuring device for conical roller bearings.