JPH0220051B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for measuring the positional dimension of a raceway groove with respect to a side surface of a raceway that is a component of an angular contact ball bearing.

Fig. 1 shows a conventional measuring device for measuring the position and dimensions of the raceway groove of a raceway ring for an angular contact ball bearing, in which 1 is an outer ring having a counterbore, which is a raceway ring for an angular contact ball bearing, and 2 is a raceway groove of the outer ring 1. ,3
4 is the front side of the outer ring 1, and 4 is the back side of the outer ring 1. The measuring device 5 has a main body 6 and a measuring section 7, and the measuring section 7 is attached to the main body 6 by two parallel leaf springs 8, and is movable in a direction perpendicular to the reference plane 9 of the main body 6. It's becoming like that. A spherical contact 10 is provided at the end of the measurement unit 7, and the reference surface 9 of the main body
An indicator 11 provided on the main body 6 indicates the amount of displacement of the measuring section 7 relative to the distance. The symbol A ₀ in the figure is the raceway groove position dimension from the front surface 3 of the outer ring to the raceway groove radius center position of the raceway groove 2.

To measure the raceway groove position dimension A ₀ of outer ring 1,
When the front surface 3 of the outer ring is brought into contact with the reference surface 9 of the measuring device main body and the 2 surfaces of the raceway groove of the outer ring are brought into contact with the contactor 10, the reference point for setting the outer ring raceway groove position and dimension (measuring the reference master) The amount of displacement of the measuring part 7 with respect to the measuring position) is the indicator 1.
1, the measured value of the raceway groove position dimension A ₀ of the outer ring 1 can be obtained from the indicated value of the indicator 11.

Outer ring raceway groove position dimensions measured in this way
A ₀ indicates the axial dimension from the front surface 3 of the outer ring to the radial center position of the raceway groove 2. However, in an angular contact ball bearing assembled using outer ring 1, when the outer ring and inner ring are moved while being pressed lightly relative to each other in the axial direction, the balls, which are rolling elements, actually come into contact with the raceway groove surface of the outer ring. The raceway groove pitch, which is the axial dimension from the position where the outer ring is located to the front face 3 of the outer ring, is not the same as the raceway groove pitch A ₀ measured by conventional measuring equipment.

In general, single row angular contact ball bearings are often used as combination bearings, so when assembling and manufacturing angular contact ball bearings, the accuracy of the axial clearance or the difference width obtained by subtracting the width of the outer ring from the combined width of angular contact ball bearings is determined. It is important to manage. However, the axial clearance and differential width depend on a combination of factors based on several machining dimensional errors, such as the raceway groove position, raceway diameter and raceway groove radius, and ball diameter of the bearing components of the outer ring and inner ring. will be determined. Therefore, in order to obtain a predetermined axial clearance or differential width for an angular contact ball bearing, when assembling the bearing, the process of selecting and assembling the bearing components, namely the outer ring, inner ring, and balls, is complicated because each has machining errors. However, there were problems in improving work efficiency. Although the raceway groove position dimension A ₀ measured with a conventional measuring device can be used as one of the characteristic values when assembling an angular contact ball bearing, it is used as a representative characteristic value for management purposes during bearing assembly. The problem was that it was inappropriate to do so.

The present invention is intended to solve the above-mentioned problems, and consists of placing the raceway ring on the reference surface with the back side of the raceway ring for angular contact ball bearings facing the reference surface, and placing the retainer in the raceway groove of the raceway ring. When the attached balls are inserted and the ball guide surface formed on the circumferential surface of the end of the measurement part that can be moved perpendicularly to the reference surface is brought into contact with the ball surface of the retainer attached balls, the balls will move against the raceway groove surface. A method for measuring the positional dimension of a raceway groove in a bearing ring for an angular contact ball bearing, which measures the relative displacement of a measuring part with respect to the side surface of the bearing ring by contacting the position of the nominal contact angle in , and for embodying this measuring method. , a reference surface on which the back side of the bearing ring is placed in contact with it, a ball with a retainer that can be fitted into the raceway groove of the bearing ring for angular ball bearings, and an end peripheral surface that is movable in the axial direction of the bearing ring. A measurement part having a ball guide surface formed to be able to hold the ball surface of a ball with a cage attached to the bearing ring, and an indicator part for instructing the relative displacement in the axial direction of the measurement part with respect to the side surface of the bearing ring. The ball guide surface is shaped so that when the ball guide surface of the measurement unit is brought into contact with the ball surface of the cage-attached ball fitted into the groove, the ball surface of the cage-attached ball comes into contact with the position of the nominal contact angle on the raceway groove surface. By having the characteristics that formed the
Anguilla ball bearings that allow you to extremely easily and accurately measure the position where the rolling elements contact the raceway groove surface of the bearing ring, which is required as a representative characteristic value to obtain a predetermined axial clearance or differential width of the angular contact ball bearing. The object of the present invention is to obtain a device for measuring the position and dimensions of raceway grooves in bearing rings.

Embodiments of the present invention will be described below based on the drawings.

Figure 2 shows outer ring 1 whose bearing ring has a counterbore.
This shows an example in which 21 is a reference surface, 22 is a cylindrical measuring part movable in a direction perpendicular to the reference surface 21, and 23 is a ball with a retainer. A conical surface 24 is provided on the outer peripheral surface of the lower end of the measuring part 22.
A ball guide surface 26 consisting of a cylindrical surface 25 and a cylindrical surface 25 is formed. The retainer balls 23 can be fitted into the raceway grooves 2 of the outer ring 1, and a plurality of balls 27 are loosely inserted and assembled into the retainer 28. Reference numerals 29 and 30 are indicator-like indicating units provided in the measuring unit 22. In the reference numerals in the figure, θ is the nominal contact angle of the outer ring 1, and the nominal contact angle here corresponds to the contact angle when it is assumed that the rolling element load becomes infinitely small. A ₁ is the positional dimension of the raceway groove on the back side from the position of the nominal contact angle θ on the surface of the raceway groove 2 of the outer ring to the back surface 4 of the outer ring 1, and A 2 is the position of the groove on the back side from the position of the nominal contact angle θ of the surface of the raceway groove ₂ of the outer ring to the position of the nominal contact angle θ on the surface of the raceway groove 2 of the outer ring. This is the front side track groove position dimension up to the front side 3 of 1. The ball guide surface 26 of the measurement section is formed in a shape that allows the ball 27 to come into contact with the two surfaces of the raceway grooves of the outer ring at a nominal contact angle θ when the ball guide surface 26 is brought into contact with the ball 27.
At this time, the measurement part 2 for the back surface 4 of the outer ring
The displacement amount of the measurement section 22 with respect to the front surface 3 of the outer ring is instructed to the instruction section 30.

To measure the rear raceway groove position dimension A ₁ and the front raceway groove position dimension A ₂ of the outer ring 1, first set the outer ring 1 as a reference so that the rear surface 4 of the outer ring 1, which is the object to be measured, contacts the reference surface 21. It is placed on the surface 21, and the retainer balls 23 are fitted into the raceway grooves 2 of the outer ring. Next, the measuring part 22 is lowered in the axial direction of the outer ring 1 into which the retainer balls 23 are fitted, and the ball guide surface 26 of the measuring part is
is brought into contact with the ball 27, and at this time, the ball 27 contacts the two surfaces of the raceway groove of the outer ring at the position of the nominal contact angle θ, and the rear raceway groove position dimension A ₁ and the front raceway groove position dimension A ₂ are set. The dimensional difference with respect to the reference value is instructed by the indicating sections 29 and 30 and measured.

Fig. 3 shows an embodiment in which the bearing ring is a shouldered inner ring, where 31 is a reference plane, 32 is an inner ring placed on the reference plane 31, and 33 is movable in a direction perpendicular to the reference plane 31. 34 is a ball with a retainer. A ball guide surface 37 consisting of a conical surface 35 and a cylindrical inner surface 36 is provided on the inner peripheral surface of the lower end of the measuring section 33.
is formed. A through hole 38 is provided in the axial center of the measuring section 33 , and a contact member 39 is fitted into this through hole 38 so as to be slidable in the axial direction of the measuring section 33 . The lower end surface 40 of the inner ring 32 is placed in contact with the reference surface 31 so that the back surface 42 of the inner ring 32 comes into contact with the front surface 42 of the inner ring 32 . It is possible to fit into the raceway groove 43 of the inner ring 32 of the retainer ball 34, and the plurality of balls 44
is fitted into and assembled into the retainer 45. 4
Reference numerals 6 and 47 are indicator-like indicating units provided in the measuring unit 33. In the symbols in the figure, θ is the nominal contact angle of the inner ring 32, B ₁ is the position dimension of the raceway groove on the back side from the position of the nominal contact angle θ on the surface of the raceway groove 43 of the inner ring to the back surface 41 of the inner ring, and B ₂
is the front side raceway groove position dimension from the position of the nominal contact angle θ of the raceway groove 43 surface of the inner ring to the front surface 42 of the inner ring. The shape of the ball guide surface 37 of the measurement part is such that when the ball guide surface 37 is brought into contact with the ball 44, the ball 44 comes into contact with the surface of the raceway groove 43 of the inner ring at a position of a nominal contact angle θ. At this time, the displacement amount of the measurement section 33 with respect to the back surface 41 of the inner ring is instructed to the instruction section 46, and the displacement amount of the measurement section 33 with respect to the front surface 42 of the inner ring is instructed to the instruction section 47.

To measure the back raceway groove position dimension B ₁ and the front raceway groove position dimension B ₂ of the inner ring 32, first place the back surface 41 of the inner ring 32, which is the object to be measured, on the reference plane 3.
The inner ring 32 is placed on the reference surface 31 so as to be in contact with the inner ring 1, and the retainer balls 34 are fitted into the raceway grooves 43 of the inner ring. Next, the inner ring 3 into which the retainer balls 34 are fitted
The measuring section 33 is lowered in the axial direction of the measuring section 2, so that the ball guide surface 37 of the measuring section is brought into contact with the balls 44, and the lower end surface 40 of the contact member 39 is brought into contact with the front surface 42 of the inner ring. At this time, the balls 44 come into contact with the surface of the raceway groove 43 of the inner ring at the position of the nominal contact angle θ, and the back side raceway groove position dimension B ₁ and the front side raceway groove position dimension B ₂ become dimensional differences with respect to the set standard value. Measurement is performed by instructions from the instruction units 46 and 47, respectively.

In the above-mentioned embodiment, the shape of the ball guide surface of the measurement part is such that when the ball guide surface comes into contact with the ball of the retainer-attached ball,
As long as the balls are in contact with each other at the nominal contact angle position on the raceway groove surface of the raceway ring, it is not limited to the one formed of a conical surface and a cylindrical surface, and 2.
Needless to say, those formed of two adjacent conical surfaces or those having an arcuate cross-sectional shape are also acceptable. Further, in order to obtain a predetermined axial clearance or differential width of the angular contact ball bearing, the positional dimensions of the raceway grooves of the bearing ring are measured on either the back side or the front side, or both sides simultaneously, as necessary. Furthermore, during measurement, either the bearing ring or the measuring part, which is the object to be measured, is rotated about the axis of the measuring part as the rotation center, and the ball surface of the retainer ball is brought into contact with the raceway groove surface of the bearing ring. Of course, it is also possible to perform measurements with small measurement errors by stabilizing the state.

The method for measuring the positional dimension of the raceway groove of the raceway ring of the angular contact ball bearing of the present invention as described above is to place the raceway ring on the reference surface with the back side of the raceway ring for the angular contact ball bearing facing the reference surface, and When a ball with a cage is inserted into the raceway groove and the ball guide surface formed on the circumferential surface of the end of the measurement part that is movable in a direction perpendicular to the reference plane comes into contact with the ball surface of the ball with a cage, The ball contacts the nominal contact angle position on the raceway groove surface to measure the relative displacement of the measuring part with respect to the front or back side of the raceway ring, and this measuring device is mounted with the back side of the raceway ring in contact. A reference surface to be placed, a ball with a cage that can be fitted into the raceway groove of the bearing ring, and a ball with a cage that can be moved in the axial direction of the bearing ring and is formed so that the ball surface of the ball with a cage can be held on the peripheral surface of the end. Equipped with a measuring section having a ball guide surface and an indicating section for instructing the relative displacement in the axial direction of the measuring section with respect to the side surface of the bearing ring, By forming the ball guide surface in a shape that allows the ball surface of the retainer-attached ball to contact the position of the nominal contact angle on the raceway groove surface when the ball guide surface is brought into contact with the ball guide surface, the raceway groove is formed from the side surface of the raceway ring. The raceway groove position dimensions up to the nominal contact angle position of the surface can be measured extremely easily and accurately with high reproducibility. Therefore, when assembling angular contact ball bearings, the selection and combination of outer ring, inner ring and balls is no longer necessary than before. It has excellent effects such as being easier to use and improving work efficiency, and being able to easily obtain the accuracy of the predetermined axial clearance or difference width of the angular ball bearing, and improving the accuracy.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing a conventional device for measuring the raceway groove position of a bearing ring for an angular ball bearing.
Figures 3 and 3 show an embodiment of the device for measuring the position and size of raceway grooves of raceway rings for angular ball bearings according to the present invention, and Figure 2 is a longitudinal sectional view of the main part of the device when the raceway is an outer ring. , FIG. 3 is a longitudinal cross-sectional view of the main part of the device when the bearing ring is an inner ring. Explanation of symbols 1... Outer ring (raceway ring), 2, 43
...Orbital groove, 3,42...Front, 4,41...
Back side, 21, 31...Reference surface, 22, 33...Measurement part, 23, 24...Ball with cage, 26, 37...
...Ball guide surface, 27,44...Ball, 29,30,4
6, 47...Instruction section, 32...Inner ring (raceway ring),
θ...Nominal contact angle, A ₁ , B ₁ ... Back side raceway groove position dimensions, A ₂ , B ₂ ... Front side raceway groove position dimensions.

Claims (1)

[Scope of Claims] 1. A ball with a retainer is inserted into the raceway groove of the bearing ring placed on the reference surface with the back side of the bearing ring for an angular contact ball bearing facing the reference surface, and When the ball guide surface formed on the circumferential surface of the end of the vertically movable measuring section is brought into contact with the ball surface of the ball with the retainer, the ball is positioned at the nominal contact angle on the raceway groove surface. A method for measuring the positional dimension of a raceway groove in a bearing ring for an angular ball bearing, the method comprising: measuring the relative displacement of the measuring part with respect to the side surface of the bearing ring by bringing the measuring part into contact with the bearing ring. 2. A reference surface on which the back side of the bearing ring for an angular ball bearing is placed in contact with each other, a ball with a retainer that can be fitted into the raceway groove of the bearing ring, and an end portion that is movable in the axial direction of the bearing ring. comprising: a measuring section in which a ball guide surface capable of holding the ball surface of the cage-attached ball is formed on the circumferential surface; and an indicating section for instructing relative displacement in the axial direction of the measuring section with respect to the side surface of the bearing ring; When the ball guide surface of the measuring section is brought into contact with the ball surface of the cage-attached ball fitted into the raceway groove of the raceway ring, the ball surface of the cage-attached ball has a nominal contact angle with the raceway groove surface. A raceway groove position and dimension measuring device for a raceway ring for an angular ball bearing, characterized in that the guide surface is formed in a shape that allows contact at a position.