JP7369330B2 - Bearing manufacturing method - Google Patents

Description

The present invention relates to a method of manufacturing a bearing that rotatably supports a shaft body.

Conventionally, for example, a bearing disclosed in Patent Document 1 includes an annular outer ring and an inner ring whose center lines coincide with each other, and a ring between the outer ring and the inner ring whose center line coincides with the center line of the outer ring and the inner ring. A ring-shaped retainer is provided. The retainer includes a rim portion that extends annularly around the centerline, and a plurality of pillar portions that extend from the rim portion in a direction along the centerline and in the same direction, and each of the pillar portions They are provided at equal intervals around the center line so that they have a comb-like shape when viewed from the radial direction. A plurality of spherical rolling elements are arranged between each pillar, and two adjacent pillars rotatably hold the rolling elements located between the two pillars. Each rolling element is in contact with the inner circumferential surface of the outer ring and the outer circumferential surface of the inner ring, respectively, and the cage allows adjacent rolling elements to roll between the outer ring and the inner ring with a space between them. This allows the outer ring and the inner ring to rotate smoothly relative to each other.

Japanese Patent Application Publication No. 2019-168084

By the way, a bearing equipped with a cage as disclosed in Patent Document 1 needs to be assembled by inserting the rolling elements one by one between each column of the cage with the cage positioned between the outer ring and the inner ring. There is a problem that the assembly work is complicated.

The present invention has been made in view of the above, and an object of the present invention is to provide a bearing that is easy to assemble.

In order to achieve the above object, the present invention is characterized in that the retainer has a structure that can be elastically deformed in the circumferential direction around the center line.

Specifically, an outer ring and an inner ring having annular shapes whose center lines coincide with each other, a rotation axis extending in the same direction as the center line or a direction crossing the center line, and a center line between the outer ring and the inner ring with a center line between the outer ring and the inner ring. a plurality of rolling elements arranged in parallel in the circumferential direction and arranged so as to be in contact with the inner circumferential surface of the outer ring and the outer circumferential surface of the inner ring, respectively; and each of the rolling elements in the circumferential direction about the center line; and a retainer for holding at a predetermined interval, the bearing being configured such that the outer ring and the inner ring rotate relative to each other around the center line as each of the rolling elements rolls around the rotation axis. The following measures were taken:

That is, in the first invention, the retainer is a ring-shaped elastic body that is formed by bending and deforming an annular metal material and is elastically deformable in a circumferential direction about the center line, The ring-shaped elastic bodies are positioned at equal intervals in a circumferential direction around the center line, are formed in a curved shape that partially follows the outer shape of the rolling element, and hold the rolling element in a rollable manner. It is characterized in that it has a plurality of rolling holding parts, and each of the rolling holding parts forms a shape that extends in a wavy manner along a circumferential direction centered on the center line.

In a second invention, in the first invention, the ring-shaped elastic member extends annularly around the center line on the inner peripheral surface of the outer ring or the outer peripheral surface of the inner ring, and It is characterized by providing an annular groove into which the groove is movably inserted in the circumferential direction.

In a third invention, in the first or second invention, the rolling element has a barrel shape in which a rolling surface in contact with an inner circumferential surface of the outer ring and an outer circumferential surface of the inner ring extends annularly around the rotation axis. (spherical roller) or drum- shaped .

In a fourth invention, in any one of the first to third inventions, an outer circumferential surface of the rolling element extends annularly around the rotation axis and is capable of guiding the rolling element. It is characterized in that an annular grooved cut portion into which the ring-shaped elastic member fits is provided .

In a fifth invention, in any one of the first to fourth inventions, the ring-shaped elastic body is a structure having a rectangular cross section formed by bending and deforming an annular member made of a band plate material. It is characterized by

In the first invention, when assembling the bearing, by expanding and contracting the ring-shaped elastic body in the circumferential direction around the center line, the ring-shaped elastic body is expanded and contracted after each rolling element is positioned between the outer ring and the inner ring. It becomes possible to assemble the bearing to each rolling element, and the assembly work of the bearing can be performed easily.

In the second invention, when the outer ring and the inner ring rotate relative to each other around the center line, the movement of the ring-shaped elastic body in the direction along the center line during the rotation of the outer ring and the inner ring is restricted, so that each rolling element rotates around the center line. It is guided in the circumferential direction around the center line without shifting in the direction along the center line with respect to the shaped elastic body, and stable rolling operation can be performed. In addition, when a shock is applied to the rolling element, such as during the initial movement of the rolling element, the ring-shaped elastic body is able to absorb the impact, making it possible to not only achieve stable operation of the bearing but also make the bearing less prone to failure. be able to.

In the third invention, since the contact area of each rolling element with the outer ring and the inner ring in the direction intersecting the rotation axis is increased, the load resistance against the force applied in the direction intersecting the rotation axis can be increased.

In the fourth invention, when the outer ring and the inner ring rotate relative to each other around the center line, the movement of each rolling element in the direction along the center line is restricted, so that each rolling element can move along the center line with respect to the ring-shaped elastic body. Rolling motion can now be performed without deviation in the direction along the direction, and the bearing operation can be stabilized.

In the fifth invention, since the contact area between the rolling element and each rolling holding portion of the ring-shaped elastic body is increased, the rolling motion of each rolling element with respect to the ring-shaped elastic body becomes stable. Therefore, the operation of the outer ring and the inner ring that rotate relative to each other via the retainer and the rolling elements becomes more stable, and the operating performance of the bearing can be further improved.

1 is a perspective view showing a part of the internal structure of a bearing according to Embodiment 1 of the present invention; FIG. FIG. 2 is a front view showing a part of the internal structure of the bearing according to FIG. 1; (a) is a diagram corresponding to FIG. 2 according to modification 1 of embodiment 1 of the present invention, and (b) is a schematic sectional view of the bearing according to modification 1 of embodiment 1, viewed from the side. . (a) is a front view showing the internal structure of Modification 2 of Embodiment 1 of the present invention, and (b) is a view corresponding to FIG. 3(b) according to Modification 2 of Embodiment 1. be. (a) is a diagram equivalent to FIG. 3(a) according to Embodiment 2 of the present invention, (b) is a diagram equivalent to FIG. 3(b) according to Embodiment 2, and (c) is a diagram equivalent to FIG. ) is a sectional view taken along line AA. (a) is a front view of a ring-shaped elastic body according to Embodiment 2, and (b) is a side view showing a state where each rolling element is arranged with respect to the ring-shaped elastic body according to Embodiment 2. be. (a) is a diagram equivalent to FIG. 3(a) according to Embodiment 3 of the present invention, (b) is a diagram equivalent to FIG. 3(b) according to Embodiment 3, and (c) is a diagram equivalent to FIG. ) is a schematic cross-sectional view taken along line BB. (a) is a diagram corresponding to FIG. 3(a) according to Embodiment 4 of the present invention, and (b) is a diagram corresponding to FIG. 3(b) according to Embodiment 4. (a) is a diagram corresponding to FIG. 4(a) according to Embodiment 5 of the present invention, and (b) is a diagram corresponding to FIG. 4(b) according to Embodiment 5. (a) is a view corresponding to FIG. 3(a) according to Embodiment 5 of the present invention, and (b) is a cross-sectional view taken along the line CC in FIG. 10(a). (a) is a front view of a ring-shaped elastic body of Embodiment 5 of the present invention, and (b) is a side view of the ring-shaped elastic body of Embodiment 5 of the present invention. FIG. 4 is a diagram corresponding to FIG. 3(a) according to Embodiment 6 of the present invention. (a) is a sectional view taken along line DD in FIG. 12, and (b) is a side view of the rolling element of the sixth embodiment. (a) is a diagram corresponding to FIG. 13(a) according to a modification of the sixth embodiment, and (b) is a diagram corresponding to FIG. 13(b) according to a modification of the sixth embodiment. (a) is a view corresponding to FIG. 3(a) according to Embodiment 7 of the present invention, and (b) is a schematic sectional view of the bearing according to Embodiment 7, viewed from the side. (a) is a perspective view showing a part of the internal structure of a bearing according to Embodiment 7 of the present invention, and (b) is a side view of a rolling element of Embodiment 7. It is a figure explaining how to assemble a bearing concerning Embodiment 7 of the present invention. (a) is a diagram corresponding to FIG. 17 according to Embodiment 8 of the present invention, and (b) is a diagram corresponding to FIG. 16(b) according to Embodiment 8 of the present invention. (a) is a plan view partially showing the internal structure according to Embodiment 9 of the present invention, and (b) is a partially schematic sectional view of the bearing according to Embodiment 9 viewed from the side. be. (a) is a diagram corresponding to FIG. 11(a) according to Embodiment 9 of the present invention, and (b) is a diagram corresponding to FIG. 11(b) according to Embodiment 9 of the present invention. (a) is a view corresponding to FIG. 19(a) according to Embodiment 10 of the present invention, and (b) is a cross-sectional view taken along the line FF in FIG. 21(a). (a) is a diagram corresponding to FIG. 20(a) according to Embodiment 10 of the present invention, and (b) is a diagram corresponding to FIG. 20(b) according to Embodiment 10 of the present invention.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially only an example.

《Embodiment 1 of the invention》
1 and 2 show a bearing 1 according to Embodiment 1 of the present invention. The bearing 1 includes an outer ring 2 and an inner ring 3 made of high carbon chromium bearing steel (SUJ material), which are annular and whose center lines C1 coincide with each other and have the same thickness. It is arranged.

An outer guide groove 2a is formed in the inner circumferential surface of the outer ring 2. The outer guide groove 2a extends annularly around the center line C1 and has an arcuate cross section.

Furthermore, on both sides of the outer guide groove 2a on the inner circumferential surface of the outer ring 2, a pair of outer lid mounting grooves 2c are formed which extend annularly about the center line C1.

An inner guide groove 3a is formed on the outer peripheral surface of the inner ring 3 at a position facing the outer guide groove 2a on the inner peripheral surface of the outer ring 2. The inner guide groove 3a has an arcuate cross section and extends annularly about the center line C1.

Further, on both sides of the inner guide groove 3a on the outer peripheral surface of the inner ring 3, a pair of inner lid mounting grooves 3c are formed which extend annularly around the center line C1.

A plurality of balls 4 (rolling elements) made of high carbon chromium bearing steel (SUJ material) are arranged between the outer ring 2 and the inner ring 3, all of which have the same diameter. Each ball 4 has a spherical surface corresponding to the curvature of each cross section of the outer guide groove 2a of the outer ring 2 and the inner guide groove 3a of the inner ring 3, and has a center line C1 at each of the outer guide groove 2a and the inner guide groove 3a. In the circumferential direction centered on , it is in contact with a rotation axis extending in the same direction as the center line C1 so as to be able to roll around it.

A ring-shaped elastic body 5 (retainer) is arranged between the outer ring 2 and the inner ring 3, and extends annularly in the circumferential direction around the center line C1. It is obtained by deforming a wire made of high carbon chromium bearing steel material (SUJ material) having a substantially circular cross section.

The ring-shaped elastic body 5 includes a plurality of rolling holding parts 5a which are curved into a substantially semicircular shape along a part of the outer shape of the ball 4. The rolling holding portions 5a are formed at equal intervals in the circumferential direction around the center line C1, and are elastically deformable in the circumferential direction.

That is, the ring-shaped elastic body 5 has a shape extending in a wave shape along the circumferential direction centering on the center line C1 when viewed from the front by each rolling holding part 5a, and each rolling holding part 5a Each ball 4 is held rotatably at equally spaced positions in the circumferential direction centering on line C1.

The outer ring 2 and the inner ring 3 are configured to rotate relative to each other around the center line C1 as each ball 4 rolls around the rotation axis.

In the opening area on one side and the opening area on the other side in the centerline direction between the outer ring 2 and the inner ring 3, there is a lid part 6 made of a metal material that extends annularly around the centerline C1 and has a substantially plate shape. The lid portion 6 is attached to the outer ring 2 and the inner ring 3 by fitting into the outer lid mounting groove 2c of the outer ring 2 and the inner lid mounting groove 3c of the inner ring 3, respectively. Note that, for convenience, the upper half of FIG. 2 bordering on the two-dot chain line is shown with the lid 6 omitted.

Next, a method of assembling the bearing 1 according to the first embodiment of the present invention will be described in detail.

First, the outer ring 2 and the inner ring 3 are placed on a pedestal with the center line C1 facing vertically, and then the outer circumferential surface of the inner ring 3 is brought into contact with one place on the inner circumferential surface of the outer ring 2. The maximum number of balls 4 that can be arranged between the inner ring 3 and the inner ring 3 are arranged along the outer guide groove 2a and the inner guide groove 3a.

Next, after aligning the center lines C1 of the outer ring 2 and the inner ring 3, each ball 4 disposed in the outer guide groove 2a and the inner guide groove 3a is moved around the center line C1. The ring-shaped elastic body 5 is arranged at equal intervals in the direction, and the ring-shaped elastic body 5 is arranged between the outer ring 2 and the inner ring 3 so that each rolling holding part 5a of the ring-shaped elastic body 5 is located at a position corresponding to each ball 4. Place it above.

Thereafter, the ring-shaped elastic body 5 is lowered and inserted between the outer ring 2 and the inner ring 3. Then, each rolling holding portion 5a expands and contracts while sliding along the outer circumferential surface of each corresponding ball 4, and externally fits onto each ball 4, thereby holding each ball 4, respectively.

Finally, each lid part 6 is installed between the outer ring 2 and the inner ring 3 so as to cover the opening area on one side in the center line direction and the opening area on the other side between the outer ring 2 and the inner ring 3, and the bearing Finish the assembly.

As described above, according to the first embodiment of the present invention, when assembling the bearing 1, by expanding and contracting the ring-shaped elastic body 5 in the circumferential direction around the center line C1, there is a gap between the outer ring 2 and the inner ring 3. After the balls 4 are positioned, the ring-shaped elastic body 5 can be assembled to each ball 4, making it possible to easily assemble the bearing 1.

Further, according to the first embodiment of the present invention, the lid portion 6 prevents dust and the like from entering between the outer ring 2 and the inner ring 3. Therefore, it is less likely that mixed dust or the like will enter between the balls 4 and the outer ring 2 and the inner ring 3, increasing the rolling resistance when the balls 4 roll. It is possible to maintain smooth relative rotational movement between the bearings 1 and 1, and to make it difficult for the bearing 1 to fail.

Note that each rolling holding portion 5a of the ring-shaped elastic body 5 of Embodiment 1 of the present invention has a shape that externally fits each ball 4 from the inner ring 3 side, but the shape is not limited to this, and as shown in FIGS. As shown in FIG. 4, the shape may be such that the outer ring 2 is externally fitted obliquely from the outer ring 2 side toward the inner ring 3 side, or the outer ring 2 may be externally fitted obliquely from the inner ring 3 side toward the outer ring 2 side.

《Embodiment 2 of the invention》
5 and 6 show a bearing 1 according to a second embodiment of the present invention. Embodiment 2 is the same as Embodiment 1 except that a part of the structure of the inner ring 3 is different from Embodiment 1, so the same parts as in Embodiment 1 are given the same reference numerals, and other parts are Only the configuration that is different from the first embodiment will be explained.

As shown in FIG. 5(c), an inner annular groove 3b is formed on the outer peripheral surface of the inner ring 3 and extends annularly around the center line C1. The ring-shaped elastic body 5 in a state where it is held can be inserted. The inner annular concave groove portion 3b guides the ring-shaped elastic body 5 together with each ball 4 when the outer ring 2 and the inner ring 3 rotate relative to each other.

The bearing 1 of Embodiment 2 is assembled in such a manner that after each rolling holding portion 5a of the ring-shaped elastic body 5 is externally fitted onto each ball 4, the ring-shaped elastic body 5 is contracted in its circumferential direction. Since it is the same as Embodiment 1 except that it is made to correspond to the inner annular groove 3b and is expanded (stretched) in the circumferential direction and fitted into the inner annular groove 3b, detailed explanation will be omitted. do.

As described above, according to the second embodiment of the present invention, when the outer ring 2 and the inner ring 3 rotate relative to each other around the center line C1, the ring-shaped elastic body 5 rotates along the center line C1 when the outer ring 2 and the inner ring 3 rotate. Since the movement in the direction is restricted, each ball 4 can be guided in the circumferential direction around the center line C1 without shifting in the direction along the center line C1 with respect to the ring-shaped elastic body 5, and the ball 4 can be stabilized. Rolling motion can be performed.

Furthermore, when an impact is applied to the ball 4 during the initial movement of the ball 4, the ring-shaped elastic body 5 can absorb the impact, so that not only stable operation of the bearing 1 can be realized, but also a bearing that is difficult to break down. It can be set to 1.

《Embodiment 3 of the invention》
FIG. 7 shows a bearing 1 according to Embodiment 3 of the present invention. Embodiment 3 is the same as Embodiment 1 except that a part of the configuration of the outer ring 2 is different from Embodiment 1, so the same parts as in Embodiment 1 are given the same reference numerals, and other parts are Only the configuration that is different from the first embodiment will be explained.

As shown in FIG. 7(c), an outer annular groove 2b is formed on the inner peripheral surface of the outer ring 2 and extends annularly around the center line C1. 4 can be inserted into the ring-shaped elastic body 5. The outer annular concave groove portion 2b guides the ring-shaped elastic body 5 together with each ball 4 when the outer ring 2 and the inner ring 3 rotate relative to each other.

The bearing 1 of Embodiment 3 is assembled in a state in which the ring-shaped elastic body 5 is contracted in the circumferential direction after each rolling holding portion 5a of the ring-shaped elastic body 5 is externally fitted onto each ball 4. Since it is the same as Embodiment 1 except that it corresponds to the outer annular groove 2b and is expanded (stretched) in the circumferential direction and fitted into the outer annular groove 2b, detailed explanation will be omitted. do.

As described above, according to the third embodiment of the present invention, when the outer ring 2 and the inner ring 3 rotate relative to each other around the center line C1, the movement of the ring-shaped elastic body 5 in the direction along the center line C1 is restricted. Each ball 4 is guided in the circumferential direction around the center line C1 without being displaced in the direction along the center line C1 with respect to the ring-shaped elastic body 5, and a stable rolling operation can be performed.

Furthermore, when an impact is applied to the ball 4 during the initial movement of the ball 4, the ring-shaped elastic body 5 can absorb the impact, so that not only stable operation of the bearing 1 can be realized, but also a bearing that is difficult to break down. It can be set to 1.

《Embodiment 4 of the invention》
FIG. 8 shows a bearing 1 according to Embodiment 4 of the present invention. Embodiment 4 is the same as Embodiment 1 except that a part of the structure of the ring-shaped elastic body 5 is different from Embodiment 1, so the same parts as in Embodiment 1 are given the same reference numerals. Only other configurations that are different from the first embodiment will be described.

The ring-shaped elastic body 5 of Embodiment 4 is formed by processing a ring-shaped member made of high carbon chromium bearing steel (SUJ material) extending into a strip shape, and has a substantially rectangular cross section. The wide side surface of the strip is shaped so that it touches each ball.

Note that the method of assembling the bearing 1 is the same as in the first embodiment, so detailed explanation will be omitted.

As described above, according to the fourth embodiment of the present invention, the contact area between the balls 4 and each rolling holding portion 5a in the ring-shaped elastic body 5 is larger than that of the ring-shaped elastic body 5 of the first embodiment. , the rolling motion of each ball 4 relative to the ring-shaped elastic body 5 becomes stable. Therefore, the operation of the outer ring 2 and the inner ring 3 that rotate relative to each other via the ring-shaped elastic body 5 and the balls 4 becomes more stable, and the operating performance of the bearing 1 can be further improved.

In addition, each rolling holding part 5a of the ring-shaped elastic body 5 of Embodiment 4 of the present invention is located near the equator of each ball 4, where the normal direction of the equatorial plane of each ball 4 is approximately perpendicular to the outer peripheral surface of the inner ring 3. However, the shape is not limited to this, and the shape is not limited to this, but it may be a shape that fits outwardly from the outer ring 2 side toward the inner ring 3 side, or a shape that fits outwardly from the inner ring 3 side to the outer ring 2 side. It may have a matching shape.

《Embodiment 5 of the invention》
9 to 11 show a bearing 1 according to a fifth embodiment of the present invention. Embodiment 5 differs from Embodiment 1 in a part of each structure of outer ring 2, inner ring 3, and ring-shaped elastic body 5, and is the same as Embodiment 1 except that lid part 6 is not provided. Components similar to those in Embodiment 1 are given the same reference numerals, and only other configurations that are different from Embodiment 1 will be described.

As shown in FIG. 10(b), the outer guide groove 2a of the outer ring 2 of the fifth embodiment is formed wider than the outer guide groove 2a of the first embodiment.

Furthermore, the inner guide groove 3a of the inner ring 3 of the fifth embodiment is formed wider than the inner guide groove 3a of the first embodiment, and its width corresponds to the width of the outer guide groove 2a.

As shown in FIG. 11, the ring-shaped elastic body 5 is arranged such that each rolling holding part 5a is alternately opened to one side and the other side in the center line direction along the circumferential direction around the center line C1. There is.

That is, when the ring-shaped elastic body 5 of Embodiment 5 holds each ball 4, as shown in FIG. The balls 4 are arranged in a staggered manner so as to straddle the ring-shaped elastic body 5 in order, and when the outer ring 2 and the inner ring 3 rotate relative to each other, each ball 4 is centered when viewed in the direction of the ball 4. In the direction along the line C1, the balls are guided by the outer guide groove 2a and the inner guide groove 3a in a state where they overlap by about 1/2 of the ball diameter.

Note that the method of assembling the bearing 1 is the same as in the first embodiment, so detailed explanation will be omitted. In order to fit the balls 4 between the outer ring 2 and the inner ring 3 at a predetermined position on the inner peripheral edge of the outer ring 2 or the outer peripheral edge of the inner ring 3 along the outer guide groove 2a and the inner guide groove 3a, the center line C1 A cutout recess having a curved shape when viewed in the direction may be provided.

As described above, according to the fifth embodiment of the present invention, the balls 4 are arranged in a staggered manner so that the balls 4 sequentially straddle the ring-shaped elastic body 5 along the circumferential direction around the center line C1 when the bearing 1 is viewed from the radial direction. Even if they are arranged, the same effect as in the first embodiment can be obtained.

《Embodiment 6 of the invention》
12 and 13 show a bearing 1 according to Embodiment 6 of the present invention. Embodiment 6 is a so-called roller bearing, and is a ball bearing in that rollers 7 are used instead of balls 4 as rolling elements, and a part of each structure of the outer ring 2, inner ring 3, and ring-shaped elastic body 5 is a ball bearing. Since this embodiment is the same as Embodiment 1 except for the differences from Embodiment 1, the same parts as in Embodiment 1 are given the same reference numerals, and only the other configurations that are different from Embodiment 1 will be described.

As shown in FIG. 13(b), the roller 7 has a substantially cylindrical shape with a column center line extending in the same direction as the center line C1, and its outer circumferential surface overlaps the inner circumferential surface of the outer ring 2 and the outer circumferential surface of the inner ring 3. and are in contact with each other.

An annular grooved notch 7a extending in the circumferential direction and having a concave cross section is formed in the center of the outer peripheral surface of the roller 7 in the center line direction.

As shown in FIG. 13(a), the outer guide groove 2a as in the first embodiment is not provided in the central portion of the inner circumferential surface of the outer ring 2 of the sixth embodiment, and the outer ring 2 is formed in an annular shape around the center line C1. An extending outer annular groove portion 2b is provided.

As shown in FIG. 12, the outer peripheral surface of the inner ring 3 of the sixth embodiment is not provided with the inner guide groove 3a as in the first embodiment, and has a flat shape along the center line C1.

The ring-shaped elastic body 5 of Embodiment 6 has a shape extending in a wavy manner along the circumferential direction centering on the center line C1 when viewed from the front, and has a shape located within a predetermined plane orthogonal to the center line C1. ing.

Each rolling holding part 5a is open toward the center line C1, and the inner peripheral part fits into the annular grooved notch part 7a of each roller 7, while the outer peripheral part is opened toward the outer ring 2. It is designed to fit into the groove portion 2b. Each roller 7 is loosely fitted into each rolling holding portion 5a, and is movable in the circumferential direction around the center line C1 within each rolling holding portion 5a.

Next, a method of assembling the bearing 1 according to Embodiment 6 of the present invention will be described in detail.

First, the outer ring 2 is placed on a pedestal with the center line C1 facing in the vertical direction, and then the ring-shaped elastic body 5 is fitted into the outer annular groove 2b of the outer ring 2.

Next, the inner ring 3 is placed on the pedestal with its center line C1 facing vertically, and then the rollers 7 are arranged in an annular manner on the outer peripheral surface of the inner ring 3 with their center lines facing vertically. have it set up.

After that, the outer ring 2 and the ring-shaped elastic body 5 that have been integrated are placed above the inner ring 3 and each of the rollers 7 arranged in parallel on the outer peripheral surface of the inner ring 3, and then The outer ring 2 and the ring-shaped elastic body 5 are lowered in an inclined state so that the center line C1 of the outer ring 2 intersects obliquely. Thereafter, the integrated outer ring 2 and ring-shaped elastic body 5 are gradually tilted relative to the inner ring 3 and each roller 7 so that the center line C1 of the outer ring 2 and the center line C1 of the inner ring 3 coincide. When the center line C1 of the outer ring 2 and the center line C1 of the inner ring 3 are aligned, the annular grooved notches 7a of each roller 7 fit outwardly into each rolling holding part 5a of the ring-shaped elastic body 5, and the ring The rollers 7 are arranged at equal intervals on the outside of the outer peripheral surface of the inner ring 3 while the shaped elastic body 5 extends in the circumferential direction.

Finally, each lid part 6 is installed between the outer ring 2 and the inner ring 3 so as to cover the opening area on one side in the center line direction and the opening area on the other side between the outer ring 2 and the inner ring 3, and the bearing Finish the assembly.

As described above, according to the sixth embodiment of the present invention, the ring-shaped elastic body 5 is fitted into the outer annular groove 2b of each roller 7, so that the outer ring 2 and the inner ring 3 rotate relative to each other around the center line C1. When doing so, the movement of each roller 7 in the direction along the center line C1 is restricted, and each roller 7 performs rolling motion without shifting in the direction along the center line C1 with respect to the ring-shaped elastic body 5. This makes it possible to stabilize bearing operation.

Although the roller 7 according to the sixth embodiment of the present invention has one annular grooved notch 7a into which the ring-shaped elastic body 5 is fitted, the invention is not limited to this, and as shown in FIG. Alternatively, a pair of ring-shaped elastic bodies 5 may be inserted into the ring-shaped elastic bodies 5, respectively.

《Embodiment 7 of the invention》
15 to 17 show a bearing 1 according to a seventh embodiment of the present invention. This Embodiment 7 is different from Embodiment 6 in a part of each structure of the outer ring 2, inner ring 3, and ring-shaped elastic body 5, and is the same as Embodiment 6 except that the lid part 6 is not provided. The same parts as in Embodiment 6 are given the same reference numerals, and only the other configurations that are different from Embodiment 6 will be described.

As shown in FIG. 15(b), the roller 7 of Embodiment 7 has a drum shape in which the outer diameter of the central portion is smaller than that of both ends in the direction of the column center line.

The inner circumferential surface of the outer ring 2 of the seventh embodiment is not provided with the outer lid attachment groove 2c and the outer annular groove groove 2b as in the sixth embodiment, but instead protrudes toward the center line C1 side. An outer annular projecting portion 2d is provided which has a gently curved cross-sectional shape and extends annularly about the center line C1. That is, the outer annular projecting portion 2d has a shape corresponding to the outer circumferential surface of the roller 7, and is in contact with the entire outer circumferential surface of the roller 7 except for the annular grooved notch 7a.

The outer circumferential surface of the inner ring 3 of the seventh embodiment is provided with an inner annular projecting portion 3d that has a gently curved cross-sectional shape projecting away from the center line C1 and extends annularly around the center line C1. . That is, the inner annular projecting portion 3d has a shape corresponding to the outer circumferential surface of the roller 7, and is in contact with the entire outer circumferential surface of the roller 7 except for the annular grooved cut portion 7a.

Each rolling holding portion 5a of the ring-shaped elastic body 5 of the seventh embodiment is open toward the opposite side of the center line C1, and the outer circumference side portion fits into the annular grooved notch portion 7a of each roller 7. On the other hand, the inner peripheral side portion is located away from the outer peripheral surface of the inner ring 3.

Next, a method of assembling the bearing 1 according to Embodiment 7 of the present invention will be described in detail.

First, the outer ring 2 is placed on a pedestal with the center line C1 facing in the vertical direction. Next, the maximum number of rollers 7 that can be arranged are arranged at predetermined intervals around the center line C1 so that the outer peripheral surface of each roller comes into contact with the inner peripheral surface of the outer ring 2.

Next, the ring-shaped elastic body 5 is inserted into the inner region of a plurality of rollers 7 arranged in an annular manner in parallel around the center line C1 in a contracted state in the circumferential direction, and then each roller 7 is inserted while being expanded in the circumferential direction. into the annular grooved notch 7a. Then, the outer ring 2, each roller 7, and the ring-shaped elastic body 5 are integrated with each roller 7 being pressed against the inner peripheral surface of the outer ring 2 by the elastic force of the ring-shaped elastic body 5.

Thereafter, as shown in FIG. 17, the outer ring 2, each of the rollers 7 and After inserting it into the inner region of the ring-shaped elastic body 5, the inner ring 3 is gradually tilted with respect to the outer ring 2 so that the center line C1 of the inner ring 3 coincides with the center line C1 of the outer ring 2. The center line C1 and the center line C1 of the inner ring 3 are made to coincide.

As described above, according to the seventh embodiment of the present invention, each roller 7 is drum-shaped and its rolling surface is in contact with the inner peripheral surface of the outer ring 2 and the outer peripheral surface of the inner ring 3, so that the rollers 7 intersect with the rotation axis. The contact area of each roller 7 with respect to the outer ring 2 and inner ring 3 in the direction of rotation becomes larger, and the load resistance against the force applied in the direction intersecting the rotation axis can be increased.

《Embodiment 8 of the invention》
FIG. 18 shows a bearing 1 according to Embodiment 8 of the present invention. Embodiment 8 is the same as Embodiment 7 except that some of the configurations of the outer ring 2, inner ring 3, ring-shaped elastic body 5, and rollers 7 are different from Embodiment 7. The same reference numerals are given to the parts, and only the other configurations that are different from the seventh embodiment will be explained.

As shown in FIG. 18(b), the roller 7 of Embodiment 8 has a barrel shape (spherical roller) in which the outer diameter of the central portion is larger than that of both ends in the direction of the column center line.

The inner circumferential surface of the outer ring 2 of the eighth embodiment is not provided with the outer annular protrusion 2d as in the seventh embodiment, but instead has a gently curved cross-sectional shape concave toward the side away from the center line C1. An outer annular groove 2e is provided which extends annularly about the center line C1. That is, the outer annular groove 2e has a shape corresponding to the outer circumferential surface of the roller 7, and comes into contact with the entire outer circumferential surface of the roller 7 except for the annular groove notch 7a.

The outer circumferential surface of the inner ring 3 of the eighth embodiment is not provided with the inner annular protrusion 3d as in the seventh embodiment, but instead has a gently curved cross-sectional shape concave toward the center line C1 side. An inner annular groove 3e is provided that extends annularly around the center line C1. That is, the inner annular groove 3e has a shape corresponding to the outer circumferential surface of the roller 7, and comes into contact with the entire outer circumferential surface of the roller 7 except for the annular groove notch 7a.

Each rolling holding part 5a of the ring-shaped elastic body 5 of the eighth embodiment is open toward the center line C1 side, and the inner circumference side part fits into the annular grooved groove part 7a of each roller 7. , the outer peripheral side portion is located away from the inner peripheral surface of the outer ring 2.

Next, a method of assembling the bearing 1 according to Embodiment 8 of the present invention will be described in detail.

First, the inner ring 3 is placed on a pedestal with the center line C1 facing in the vertical direction. Next, the maximum number of rollers 7 that can be arranged are arranged at predetermined intervals around the center line C1 so that the outer peripheral surfaces of the rollers 7 are in contact with the outer peripheral surface of the inner ring 3.

Next, the ring-shaped elastic body 5 is fitted around the outer side of the plurality of rollers 7 arranged in an annular manner around the center line C1 so as to be stretched in the circumferential direction, and then each roller is contracted in the circumferential direction. 7 into the annular grooved notch 7a. Then, the inner ring 3, each roller 7, and the ring-shaped elastic body 5 are integrated with each roller 7 being pressed against the outer peripheral surface of the inner ring 3 by the elastic force of the ring-shaped elastic body 5.

After that, as shown in FIG. 18(a), the inner ring 3, each roller 7, and the ring-shaped elastic body are assembled so that the center line C1 of the inner ring 3 diagonally intersects with the center line C1 of the outer ring 2. 5 into the inner area of the outer ring 2 in a tilted state, the inner ring 3 is integrated with the outer ring 2 so that the center line C1 of the inner ring 3 coincides with the center line C1 of the outer ring 2, and each The rollers 7 and the ring-shaped elastic body 5 are gradually tilted to align the center line C1 of the outer ring 2 and the center line C1 of the inner ring 3.

According to the eighth embodiment of the invention, each roller 7 has a barrel shape (spherical roller) and its rolling surface is in contact with the inner circumferential surface of the outer ring 2 and the outer circumferential surface of the inner ring 3. The contact area of each roller 7 with respect to the outer ring 2 and inner ring 3 in the direction intersecting the rotation axis becomes larger, and the load resistance against the force applied in the direction intersecting the rotation axis can be increased.

《Embodiment 9 of the invention》
19 and 20 show a bearing 1 according to a ninth embodiment of the present invention. Embodiment 9 is a so-called thrust bearing, and is the same as Embodiment 1 except that the outer ring 2, inner ring 3, and ring-shaped elastic body 5 are partially different from Embodiment 1. Components similar to those in Embodiment 1 are given the same reference numerals, and only other configurations that are different from Embodiment 1 will be described.

The outer ring 2 of the ninth embodiment has a flat donut shape that is open on one side in the centerline direction and extends annularly about the centerline C1, and is housed in a housing (not shown). An opening (not shown) is formed inside the outer ring 2, and an outer peripheral wall portion 2f that protrudes to one side in the centerline direction is formed at the outer peripheral edge.

The outer guide groove 2a of the ninth embodiment has a shape that opens on one side in the centerline direction inside the outer circumferential wall 2f of the outer ring 2 and extends annularly around the centerline C1.

The inner ring 3 of Embodiment 9 has a flat donut shape that opens on the other side in the center line direction and extends annularly about the center line C1, and has a through hole 3f inside thereof into which the shaft G1 can be fitted. is formed.

Although not shown in FIG. 19, the inner guide groove 3a of Embodiment 9 is formed at a position facing the outer guide groove 2a of the outer ring 2, and there are a plurality of Ball 4 is placed.

As shown in FIG. 20, the ring-shaped elastic body 5 of Embodiment 9 is formed by deforming a wire so as to wrap it around the center line C1 twice. Each of the rolling holding parts 5a is open toward the center line C1, arranged in an annular shape around the center line C1, and arranged between the outer guide groove 2a and the inner guide groove 3a. It is designed to fit into each ball 4 from the outside.

Next, a method of assembling the bearing 1 according to the ninth embodiment of the present invention will be described in detail.

First, the outer ring 2 housed in a housing (not shown) is placed on a pedestal with the center line C1 facing in the vertical direction. Next, the balls 4 are arranged with respect to the outer guide groove 2a of the outer ring 2 at a predetermined interval in the circumferential direction around the center line C1, and each ball 4 arranged in an annular shape is given a respective rotation. After arranging the ring-shaped elastic body 5 so that the dynamic holding portion 5a fits from the outside, the inner ring 3 is attached to the outer ring 2 from above so that the inner guide groove 3a fits onto each ball 4 from above.

As described above, according to the ninth embodiment of the present invention, even if the bearing 1 is a thrust bearing in which the rolling elements are comprised of balls 4, the same effects as in the first embodiment can be obtained.

《Embodiment 10 of the invention》
21 and 22 show a bearing 1 according to a tenth embodiment of the present invention. Embodiment 10 is different from Embodiment 9 except that rollers 7 are used instead of balls 4 as rolling elements, and a part of each structure of outer ring 2, inner ring 3, and ring-shaped elastic body 5 is different from Embodiment 9. Since this embodiment is similar to Embodiment 9, the same parts as those in the embodiment are given the same reference numerals, and only the other configurations that are different from Embodiment 9 will be described.

The roller 7 of Embodiment 10 has a barrel shape (spherical roller) in which the outer diameter of the center portion is larger than that of both ends in the direction of the column center line.

An opening 2g is formed inside the outer ring 2 of the tenth embodiment, and the thickness thereof gradually increases from the opening 2g toward the outer peripheral edge.

The surface of the outer ring 2 on one side in the centerline direction has a gently curved cross-sectional shape concave toward the other side in the centerline direction, and is an outer annular curved surface 2h extending annularly around the centerline C1. The annular curved surface 2h has a shape corresponding to the outer peripheral surface of the roller 7.

The outer annular groove portion 2b of Embodiment 10 is formed to extend annularly around the center line C1 at approximately the center of the outer annular curved surface 2h.

The thickness of the inner ring 3 of Embodiment 10 becomes gradually thinner from the through hole 3f into which the shaft G1 can be fitted toward the outer peripheral edge.

The surface of the inner ring 3 on the other side in the centerline direction has a gently curved cross-sectional shape concave toward one side in the centerline direction, and is an inner annular curved surface 3h extending annularly around the centerline C1. The annular curved surface 3h has a shape corresponding to the outer peripheral surface of the roller 7.

In the ring-shaped elastic body 5 of Embodiment 10, the opening direction of each rolling holding part 5a is oriented diagonally toward the center line C1 side, and the inner circumferential portion fits into the outer circumferential surface of the roller 7. On the other hand, the outer peripheral side portion is fitted into the outer annular groove 2b.

Next, a method of assembling the bearing 1 according to Embodiment 10 of the present invention will be described in detail.

First, the outer ring 2 housed in a housing (not shown) is placed on a pedestal with the center line C1 facing in the vertical direction. Next, the outer part of each rolling holding part 5a of the ring-shaped elastic body 5 is fitted into the outer annular groove part 2b of the outer ring 2, and each roller 7 is arranged in the inner part of each rolling holding part 5a. The outer peripheral surface of each roller 7 is brought into contact with the outer annular curved surface 2h of the outer ring 2. Thereafter, the inner ring 3 is attached to the outer ring 2 from above so that the inner annular curved surface 3h contacts each of the rollers 7 arranged in an annular manner.

As described above, according to the tenth embodiment of the present invention, even if the bearing 1 is a thrust bearing in which the rolling elements are rollers 7, the same effects as in the first embodiment can be obtained.

Further, since there is no outer guide groove 2a and inner guide groove 3a for guiding the rolling elements as in the ninth embodiment of the present invention, the rolling elements 7 move in the radial direction of the outer ring 2 and the inner ring 3 centering on the center line C1. be able to. Therefore, runout and vibration in the direction perpendicular to the axis G1 can be absorbed, so that stable operation of the bearing 1 can be realized.

For example, if the bearing 1 is large-sized, the ring-shaped elastic body 5 may be obtained from an annular member obtained by winding an elongated metal member twice or multiple times. Then, even if the bearing 1 is large and the ring-shaped elastic body 5 has a large structure accordingly, the cross-sectional modulus of the metal member constituting the ring-shaped elastic body 5 becomes too large and the ring-shaped elastic body 5 is bent. This can prevent things from becoming difficult. Moreover, when the ring-shaped elastic body 5 is large, it may have a structure in which a notch is provided in a part so that it has a substantially C-shape when viewed in the direction of the center line. Then, even if the ring-shaped elastic body 5 becomes a large structure and the section modulus of the metal member constituting the ring-shaped elastic body 5 becomes too large, the ring-shaped elastic body 5 will be easily bent, and the attachment to the bearing 1 will be difficult. It can make your work easier.

Further, in Embodiments 1 to 10 of the present invention, the bearing 1 including the ring-shaped elastic body 5 is made of carbon steel, but is not limited to this, and may be made of other alloy metal materials such as alloy steel or stainless steel. The same effect can be obtained even if it is made of a non-metallic material such as rubber, plastic, or ceramic.

1 Bearing 2 Outer ring 2b Outer annular groove 3 Inner ring 3b Inner annular groove 4 Ball (rolling element)
5 Ring-shaped elastic body (retainer)
5a Rolling holding part 6 Lid part 7 Roller (rolling element)
7a Annular grooved notch C1 Center line

Claims (2)

An annular outer ring and an inner ring whose center lines coincide with each other, and a rotation axis extending in the same direction or a direction crossing the center line, and a plurality of rings arranged in a circumferential direction around the center line between the outer ring and the inner ring. and a spherical rolling element disposed so as to be in contact with the inner circumferential surface of the outer ring and the outer circumferential surface of the inner ring, respectively; A method for manufacturing a bearing, comprising: a retainer that holds the bearing at intervals, and is configured such that the outer ring and the inner ring rotate relative to each other around the center line as each of the rolling elements rolls around the rotation axis. hand,
The retainer is a ring-shaped elastic body that is formed by bending and deforming an annular metal material having a substantially circular cross section, and is elastically deformable in a circumferential direction about the center line;
The ring-shaped elastic bodies are positioned at equal intervals in a circumferential direction around the center line, are formed in a curved shape that partially follows the outer shape of the rolling element, and hold the rolling element in a rollable manner. 1. A method of manufacturing a bearing, comprising a plurality of rolling holding parts, each of which forms a shape extending in a wavy manner along a circumferential direction centered on the center line. The method for manufacturing a bearing according to claim 1,
An annular recess that extends annularly around the center line and into which the ring-shaped elastic body fits movably in the circumferential direction around the center line, on the inner circumferential surface of the outer ring or the outer circumferential surface of the inner ring. A method for manufacturing a bearing, characterized in that a groove is provided.

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