JP2002213579A - Manufacturing method for bearing with resin pulley and bearing outer ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To concurrently and simply machine many bearing outer rings 11 in a manufacturing method for a bearing with a resin pulley and its bearing outer ring suitably used for a belt or the like for driving accessories of an automobile. SOLUTION: This bearing with the resin pulley is integrally molded with the resin pulley on the outer periphery of the outer ring 11 of a rolling bearing, and an antislip groove L inclined against the peripheral direction is formed on the outer periphery of the outer ring 11. An outer ring assembly 15 closely arranged with a plurality of outer rings 11 adjacently in the axial direction is pushed into a tubular machining tool 20 having a continuous spiral cutting edge 22 on the inner peripheral face 21, and one of the outer ring assembly 15 and the machining tool 20 is rotated, thereby antislip grooves L are formed on the outer peripheral face of the outer ring assembly 15. Many bearing outer rings 11, on which the occurrence of creep is prevented, are concurrently and simply machined, the machining time is shortened, and the manufacturing cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a belt transmission mechanism,
More particularly, the present invention relates to a method for manufacturing a bearing with a resin pulley suitable for use in a belt for driving auxiliary equipment of an automobile and a bearing outer ring thereof.

[0002]

2. Description of the Related Art Conventionally, pulleys used for accessory drive belts for transmitting the rotational power of an engine to an accessory of an automobile have been made of metal for rolling bearings in order to reduce the weight and cost. A resin-pulley bearing is used in which a synthetic resin pulley is integrally formed on the outer peripheral surface of the outer ring.

In a bearing with a resin pulley, since the material of the bearing outer ring and the material of the pulley have different linear expansion coefficients, the degree of adhesion between the bearing outer ring and the pulley decreases due to the difference in thermal expansion when the temperature rises, and the outer ring and the pulley Relative slipping (creep) may occur between the two.

[0004]

As a method of preventing the occurrence of creep in a conventional bearing with a resin pulley, an eccentric groove or a knurl is formed in the outer peripheral surface of a bearing outer ring in a circumferential direction. However, eccentric grooves and knurls are difficult to machine,
There has been a problem that the manufacturing cost is high.

SUMMARY OF THE INVENTION The present invention provides a bearing with a resin pulley and a method of manufacturing a bearing outer ring which can simultaneously and easily process a large number of bearing outer rings in which creep has been prevented, thereby reducing the processing time and the manufacturing cost. With the goal.

[0006]

According to a first aspect of the present invention, there is provided a bearing with a resin pulley, wherein a resin pulley is integrally formed on an outer peripheral surface of an outer ring of a rolling bearing. A non-slip groove inclined with respect to the direction is formed. The resin pulley is injection-molded, for example, on the outer peripheral surface of the outer ring in a state where the molten resin is filled in the anti-slip groove and solidified. Note that a plurality of non-slip grooves may be provided in parallel, and each of the non-slip grooves may be arranged evenly with respect to the center axis of the outer ring.

[0007] With this configuration, it is possible to reliably prevent the resin pulley from being fitted into the non-slip groove formed on the outer peripheral surface of the outer ring and causing creep between the outer ring and the pulley. Further, when forming a non-slip groove inclined with respect to the circumferential direction on the outer peripheral surface of the outer ring, a plurality of outer rings can be arranged side by side to process the non-slip groove at once. Furthermore, by arranging a plurality of non-slip grooves on the outer peripheral surface of the outer ring evenly with respect to the center axis of the outer ring, it is possible to prevent the pulley from oscillating.

According to a fifth aspect of the present invention, there is provided a method for manufacturing an outer race of a rolling bearing used for a bearing with a resin pulley according to the first aspect, wherein the outer peripheral surface has a cylindrical shape having a continuous spiral cutting blade on an inner peripheral surface. By pushing an outer ring assembly in which a plurality of outer rings are densely arranged side by side in the axial direction in a processing tool and rotating one of the outer ring assembly and the processing tool, the outer ring assembly A non-slip groove is formed on the outer peripheral surface. Note that a plurality of cutting blades may be provided side by side on the inner peripheral surface of the processing tool.

As described above, since the non-slip groove is formed by pushing the outer ring assembly having a plurality of outer rings in parallel into the working tool and relatively rotating the outer ring assembly, the outer ring assembly can be easily formed on the plurality of outer rings at once. Non-slip grooves can be machined.

According to a sixth aspect of the present invention, there is provided a method for manufacturing an outer race of a rolling bearing used for a bearing with a resin pulley according to the first aspect, wherein the outer peripheral surface has a cylindrical cutting blade having a continuous spiral cutting blade. A non-slip groove is formed on the outer peripheral surface of the cylindrical base material by pushing a cylindrical base material corresponding to a plurality of outer rings into the processing tool and rotating one of the cylindrical base material and the processing tool. After forming the outer ring, the outer ring is formed by cutting the cylindrical base material. Note that a plurality of cutting blades may be provided side by side on the inner peripheral surface of the processing tool.

As described above, since the non-slip groove is formed by pushing the cylindrical base material corresponding to a plurality of outer rings into the working tool and rotating them relative to each other, it is easy to slide on the plurality of outer rings at once. Stop grooves can be machined.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described.
This will be described with reference to FIGS.

FIG. 1 shows an outer peripheral surface 1 of an outer race 11 of a rolling bearing.
2 shows a partial cross-sectional view of a bearing 10 with a resin pulley formed by integrally molding a pulley 13 made of synthetic resin.
A non-slip groove L is formed on the outer peripheral surface 12 of the pulley 13, and an accessory driving belt (not shown) is hung on the outer peripheral surface 14 of the pulley 13.

Next, a method of forming the non-slip groove L on the outer peripheral surface 12 of the outer race 11 will be described. In processing the non-slip groove L, as shown in FIG. 2, a cylindrical processing tool 20 having a spiral cutting blade 22 continuous with an inner peripheral surface 21 is used.

That is, a plurality of outer rings 11 are densely arranged side by side in the axial direction to form an outer ring assembly 15, and a rod-like support jig 23 is inserted into the outer ring assembly 15 to connect each outer ring 11. The outer ring assembly 15 is supported and pushed into the processing tool 20 while rotating the support jig 23. Thereby, the nonslip groove L is continuously formed on the outer peripheral surface 12 of each outer ring 11 of the outer ring assembly 15 by the cutting blade 22. In addition, each outer ring 11
In order to prevent the outer ring assembly 15 from being displaced in the axial direction and idling, the outer ring assembly 15 can be fixedly pinched from both sides with screws or the like.
May be provided on the outer peripheral surface of the support jig 23 to engage with the inner surface of the support jig 23 in a detented state.

After the formation of the non-slip groove L, the outer ring assembly 15 is pulled out from the processing tool 20 by pushing the support jig 23 while rotating or rotating the support jig in the opposite direction, and as shown in FIG. The outer race 11 having the non-slip groove L formed on the surface 12 inclined with respect to the circumferential direction is obtained.

The non-slip groove L may be formed on the outer peripheral surface 12 of the outer race 11 by fixing the support jig 23 and rotating the processing tool 20.

FIG. 4 shows a step of integrally forming a pulley 13 made of synthetic resin on the outer peripheral surface 12 of the outer ring 11 of the bearing. The pulley 13 is formed by, for example, injection molding. That is, the rolling bearing or its outer ring 11 is
0, and fix the runner 3 in the cavity 33 in the mold.
After filling with the molten resin through the resin injection gate 1 and the resin injection gate 32, the molten resin is solidified.

FIG. 5 is an enlarged view of the outer peripheral surface 12 of the outer race 11. That is, the resin pulley 13 is injection-molded on the outer peripheral surface 12 of the outer race 11 in a state where the molten resin is filled and solidified in the non-slip groove L, and the resin pulley 13 is axially oriented by the non-slip groove L inclined with respect to the circumferential direction. As a result, circumferential creep of the outer race 11 and the resin pulley 13 can be reliably prevented even when the temperature rises.

FIG. 6 shows an example in which _{two non-} slip grooves L ₁ and L ₂ are formed on the outer peripheral surface 12 of the outer race 11. That is, two spiral cutting blades 42 continuous with the inner peripheral surface 41,
Outer ring assembly 1 in which a plurality of outer rings 11 supported by a supporting jig are densely arranged using a cylindrical processing tool 40 having
Push in while rotating 5. Thereby, each outer ring 11
As shown in FIG. 7, two non-slip grooves L ₁ and L ₂ are formed on the outer peripheral surface 12 of the outer ring 11 so as to be evenly arranged with respect to the center axis CC of the outer ring 11.

The number of the non-slip grooves L is not particularly limited. For example, as shown in FIG.
May have three non-slip grooves L ₁ , L ₂ , L ₃ or more. Further, the non-slip grooves L do not have to be evenly arranged with respect to the central axis CC of the outer race 11, and the groove shape is not limited to a V-shaped cross section, and may be, for example, a rectangular groove or the like. There may be. In addition, the inclination angle and the groove interval of the non-slip groove L with respect to the circumferential direction are set to values that allow normal grinding without causing trouble such as catching when the outer ring 11 is rotated during track grinding. Also, the depth, width and shape of the non-slip groove L are set to dimensions and shapes that do not cause a problem in the strength of the outer race 11.

Further, a long cylindrical base material corresponding to a plurality of outer rings is pushed into the working tool while being supported and rotated by a support jig, and a non-slip groove is formed on the outer peripheral surface of the cylindrical base material. After forming, the outer race may be formed after cutting the cylindrical base material to a predetermined length.

[0023]

According to the method of manufacturing a bearing with a resin pulley and a bearing outer ring of the present invention, a large number of bearing outer rings in which creep is prevented can be simultaneously and easily processed, thereby reducing the processing time and the manufacturing cost. The effect of being able to achieve is obtained.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a bearing with a resin pulley according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a step of processing an outer ring of the bearing with a resin pulley according to the embodiment of the present invention.

FIG. 3 is a front view of an outer ring of the bearing with a resin pulley according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a manufacturing process of the bearing with a resin pulley according to one embodiment of the present invention.

FIG. 5 is a partially enlarged cross-sectional view of a bearing with a resin pulley according to one embodiment of the present invention.

FIG. 6 is a cross-sectional view of a modified example of a process of processing an outer ring of a bearing with a resin pulley according to an embodiment of the present invention.

FIG. 7 is a front view of an outer race of a modified example of the bearing with a resin pulley according to one embodiment of the present invention.

FIG. 8 is a front view of an outer ring of still another modified example of the bearing with a resin pulley according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bearing with resin pulley 11 Outer ring 12 Outer peripheral surface 13 Pulley 15 Outer ring assembly 20, 40 Processing tool 22, 42, 43 Cutting blade 23 Supporting jig L Non-slip groove

Claims (7)

[Claims] 1. A bearing with a resin pulley in which a resin pulley is integrally formed on an outer peripheral surface of an outer ring of a rolling bearing, wherein a non-slip groove inclined with respect to a circumferential direction is formed on an outer peripheral surface of the outer ring. Bearing with resin pulley. 2. The bearing with a resin pulley according to claim 1, wherein a plurality of non-slip grooves are provided side by side. 3. The bearing with a resin pulley according to claim 2, wherein each of the non-slip grooves is arranged evenly with respect to a center axis of the outer ring. 4. The bearing with a resin pulley according to claim 1, wherein the resin pulley is injection-molded on the outer peripheral surface of the outer race in a state where molten resin is filled in the non-slip groove and solidified. . 5. A method for manufacturing an outer race of a rolling bearing used for a bearing with a resin pulley according to claim 1, wherein the cylindrical processing tool has a continuous helical cutting blade on an inner peripheral surface thereof. By pushing in an outer ring assembly in which a plurality of outer rings are densely juxtaposed axially adjacent to each other and rotating one of the outer ring assembly and the processing tool, the outer ring assembly is moved toward the outer peripheral surface of the outer ring assembly. A method of manufacturing a bearing outer ring, wherein a non-slip groove is formed. 6. A method for manufacturing an outer race of a rolling bearing used for a bearing with a resin pulley according to claim 1, wherein the cylindrical working tool has a continuous spiral cutting blade on an inner peripheral surface thereof. After pressing a cylindrical base material corresponding to a plurality of outer rings, and rotating one of the cylindrical base material and the processing tool, after forming a non-slip groove on the outer peripheral surface of the cylindrical base material, A method of manufacturing a bearing outer ring, comprising cutting the cylindrical base material to form an outer ring. 7. The processing tool according to claim 5, wherein a plurality of cutting blades are arranged in parallel on an inner peripheral surface of the processing tool.
The manufacturing method of the bearing outer ring described in the above.