JP2007247666A - Outer ring for constant velocity joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein vibration control rubber provided between an outer ring on an outer side and an outer ring on an inner side generates heat by vibration in an outer ring for a constant velocity joint provided with a rolling channel for a steel ball. <P>SOLUTION: The outer ring is constituted by providing a plate spring 7 forming an elastically deforming part 12 by folding back into both end parts as a vibration control member provided between the outer ring 1 on the outer side and the outer ring 2 on the inner side and compressing and deforming the elastically deforming part 12 between fitting faces 3 and 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an outer ring for a constant velocity joint used for power transmission in various industrial machines and vehicles, and more particularly to a vibration-proof outer ring.

  Conventionally known anti-vibration outer rings for constant velocity joints include an outer outer ring and an inner outer ring that are fitted together with a required gap, and the inner outer ring has a plurality of track grooves, and the track Interference protrusions in the axial direction are formed on the outer outer ring on the outer surface of the inner outer ring between the grooves and the inner surface of the outer outer ring facing the inner outer ring, and the inner outer ring has an interference protrusion on the inner outer ring. A fitting groove is provided, and an anti-vibration rubber as an anti-vibration material is fixed by vulcanization adhesion or the like between the outer outer ring and the inner outer ring (Patent Document 1).

The vibrations propagating between the outer outer ring and the inner outer ring are absorbed by the anti-vibration rubber. Further, the interference protrusions and the grooves are engaged in the circumferential direction, so that the relative movement of the outer outer ring and the inner outer ring in the circumferential direction is restricted, thereby preventing excessive deformation of the vibration isolating rubber.
Japanese Patent No. 3053636

  As mentioned above, the anti-vibration rubber is prevented from excessive deformation due to the interference between the interference protrusion and the groove. However, if minute vibrations are applied to the joint without interruption, the rubber structure generates heat due to repeated loads acting on the anti-vibration rubber. There was a problem that the internal pressure inside the joint increased with the heat generation. In addition, it is necessary to fix the anti-vibration rubber between the outer outer ring and the inner outer ring by vulcanization or the like.

  Accordingly, an object of the present invention is to prevent heat generation due to the vibration proof rubber and prevent an increase in the internal temperature of the joint.

  In order to solve the above-described problem, the present invention is configured so that the outer outer ring 1 and the inner outer ring 2 are fitted to each other with a required gap 9 as shown in FIGS. 2 is provided with a groove 6 that engages with the interference protrusion 4, and the other engagement surface 5 is provided with a groove 6 that engages with the interference protrusion 4. An outer ring for a constant velocity joint in which a vibration isolating material is interposed, an outer outer ring 1 and an inner outer ring 2 are integrated through the vibration isolating material, and a plurality of rolling grooves 14 of steel balls are formed on the inner surface of the inner outer ring 2. 8, the vibration isolator is formed by a leaf spring 7, and the leaf spring 7 is provided with an elastic deformation portion 12 that is compressed between the opposing surfaces of the fitting surfaces 3 and 5. is there.

  As the leaf spring 7, for example, as shown in FIGS. 3A and 3B, the bending portion 11 straddling the interference protrusion 4 and both side portions of the bending portion 11 are connected to the bending portion 11. It is possible to use one provided with the elastic deformation portion 12 by being folded outward along the line. Further, there is a case where the entire leaf spring 7 as shown in FIG. 4A is corrugated and the elastic deformation portion 12 ′ is provided by the corrugation.

  In the constant velocity joint outer ring 8 having the above-described configuration, the leaf spring 7 is restricted from moving in the circumferential direction by straddling the interference protrusion 4. Further, since the elastically deforming portions 12 and 12 ′ formed by the folding and corrugation are interposed between the fitting surfaces 3 and 5 with a compression allowance, vibration propagating between the outer outer ring 1 and the inner outer ring 2 is absorbed. In addition, the outer outer ring 1 and the inner outer ring 2 can be integrated by the friction of the elastically deforming portions 12 and 12 '.

  As described above, the outer ring for a constant velocity joint of the present invention uses a leaf spring as a vibration isolator interposed between the fitting surfaces of the outer outer ring and the inner outer ring fitted to each other, and By providing the elastically deforming portion that is compressed between the fitting surfaces, vibrations transmitted between the outer outer ring and the inner outer ring are absorbed by the leaf spring, and the outer outer ring and the inner outer ring are integrated. . Further, even if vibration is repeatedly applied to the leaf spring, the leaf spring does not generate heat unique to rubber, and therefore, an increase in internal pressure inside the joint can be prevented.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  The constant velocity joint outer ring 8 of the first embodiment shown in FIGS. 1 to 3 includes an outer outer ring 1, an inner outer ring 2, and a leaf spring 7 as a vibration isolating material. The outer outer ring 1 has a cup shape with one end open, and an outer ring shaft 19 is provided in the center of the end face on the closing side. The inner outer ring 2 is fitted to the inner surface of the outer outer ring 1, that is, the fitting surface 3 with a required fitting gap 9.

  An axial interference protrusion 4 is provided on the fitting surface 3 of the outer outer ring 1 at a position equally divided by six in the circumferential direction. The cross-sectional shape of the interference protrusion 4 is a gentle mountain shape as shown in the figure. The inner outer ring 2 is formed with a rolling groove 14 of a steel ball 21 incorporated in the inner ring 25 (see FIG. 2) at equal intervals on the inner surface, and an inter-groove wall surface 22 is formed between the rolling grooves 14. It is formed.

  The inner outer ring 2 is thinnest at the groove bottom portion of the rolling groove 14, and a groove 6 facing the interference protrusion 4 is provided at an outer surface portion of the inter-groove wall surface 22.

  When the inner outer ring 2 is fitted inside the outer outer ring 1, the leaf spring 7 is temporarily secured to the interference protrusion 4 of the outer outer ring 1, and then the inner outer ring 2 is press-fitted. The inner outer ring 2 is press-fitted while compressing the leaf spring 7, and a fixed gap 9 is formed between both the fitting surfaces 3 and 5 at portions other than the leaf spring 7. In addition, the interference protrusion 4 of the outer outer ring 1 is inserted into the groove 6 via the leaf spring 7, and the relative rotation between the outer outer ring 1 and the inner outer ring 2 is restricted by the insertion.

  A protrusion 10 is provided on the outer peripheral surface of the open end of the inner outer ring 2, thereby preventing the leaf spring 7 from coming off. Further, an axial gap 9 ′ is provided between the protrusion 10 and the open end of the outer outer ring 1.

  As shown in FIGS. 3A and 3B, the leaf spring 7 includes a curved portion 11 straddling the interference protrusion 4 and along the curved portion 11 on both sides of the curved portion 11. It consists of the elastic deformation part 12 formed by folding. The elastic deformation portion 12 is interposed between the interference protrusion 4 and the groove 6 with a required compression allowance.

  The outer ring 8 of the first embodiment is as described above. As shown in FIG. 2, the inner ring 25 is inserted into the inner outer ring 2, and the steel ball 21 is fitted into the rolling groove 14 and the inner ring shaft 23. A boot 24 is mounted between the outer outer ring 1 and the outer outer ring 1 and is used as a sliding type constant velocity joint.

  The relative rotation or axial movement of the outer outer ring 1 and the inner outer ring 2 and the movement of the leaf spring 7 itself in the circumferential direction during use are caused by friction and interference ridges due to compression deformation of the elastically deformable portion 12 of the leaf spring 7. 4 and the groove 6 prevent this. Further, the vibration propagating between the outer outer ring 1 and the inner outer ring 2 is absorbed by minute elastic deformation of the elastic deformation portion 12.

  FIGS. 4A to 4C show an example in which a part of the first embodiment is changed. FIG. 4A shows an example in which the leaf spring 7 is modified. In other words, the leaf spring 7 in this case is subjected to fine corrugation in which axial peaks and valleys are lined up as a whole, and an elastically deforming portion 12 ′ is formed by the corrugation. A curved space 9 between the grooves 6 is interposed in the curved state with a required compression allowance. The outer outer ring 1 and the inner outer ring 2 are integrated by friction or the like due to the compression deformation. Further, the vibration propagating between the outer outer ring 1 and the inner outer ring 2 is absorbed by minute elastic deformation of the elastic deformation portion 12 '.

  4 (b) and 4 (c), the relationship between the interference protrusion 4 and the groove 6 is opposite to that in FIG. 3, the interference protrusion 4 is on the fitting surface 5 of the inner outer ring 2, and the groove 6 is on the outer outer ring. 1 is formed on each of the fitting surfaces 3. In the case of FIG. 4B, the leaf spring 7 is formed with an elastically deforming portion 12 by folding, and in the case of FIG. 4C, the fine corrugation formed on the whole as in the case of FIG. Thus, an elastically deformable portion 12 ′ is formed.

  Next, the second embodiment shown in FIGS. 5A and 5B is the first embodiment in that it is the outer ring 8 of the sliding type constant velocity joint constituted by the outer outer ring 1, the inner outer ring 2 and the vibration isolating material. However, the shape of the leaf spring 15 interposed between the outer outer ring 1 and the inner outer ring 2 as a vibration isolating material is different. That is, in this case, the leaf spring 15 is interposed between two adjacent interference protrusions 4, and a curved portion 26 is formed along the outer peripheral surface of the inner outer ring 2, and both side portions of the curved portion 26 are formed. Each of the bent portions 16 is bent along the wall surface of the groove 6. Further, the elastic deformation portion 18 is formed by folding back the front edge of the bent portion 16 along the interference protrusion 4.

  Since the leaf | plate spring 15 is interposed between the interference protrusions 4 and 4 of the both sides, the movement to the circumferential direction is controlled. Further, as in the case of the first embodiment, since the elastic deformation portion 18 is interposed between the interference protrusion 4 and the groove 6 with a compression allowance, the outer outer ring 1 and the inner outer ring 2 are integrated, and the outer side Vibration propagating between the outer ring 1 and the inner outer ring 2 is absorbed by the elastic deformation portion 18.

  6 (a) and 6 (b) show an example in which the leaf spring 15 is deformed. In this case, the leaf spring 15 also has a bent portion 26 similar to the above and bent portions 16 and 16 formed at both ends thereof. However, the elastically deforming portion 18 ′ is formed by fine corrugation arranged along the axial direction over the entire plate spring 15.

  FIG. 7A is a modification of FIG. 5, and FIG. 7B is a modification of FIG. In any case, the interference protrusion 4 and the groove 6 are reversed, that is, the interference protrusion 4 is provided on the inner outer ring 2 side, and the groove 6 is provided on the outer outer ring 1 side. 16 is formed outward. In the case of FIG. 7 (a), the elastic deformation portion 18 is formed by folding the front end side edge of the bending portion 16, and in the case of FIG. 7 (b), the elastic deformation portion 18 'is formed by fine corrugation.

  In the third embodiment shown in FIGS. 8 (a) and 8 (b), an axial slit 27 is provided between the track grooves 14 of the inner outer ring 2 in place of the grooves 6 of the respective embodiments. The interference protrusion 4 of the outer ring 1 fits into the slit 27 portion. The elastic deformation portion 18 is formed by folding the tip of the bent portion 16 along the interference protrusion 4.

  FIG. 9 also shows that the inner outer ring 2 is provided with slits 27. In this case, the leaf spring 15 is subjected to fine corrugation on the whole, thereby forming an elastic deformation portion 18 '.

  10 (a) and 10 (b), the fourth embodiment shown in FIGS. 10 (a) and 10 (b) is replaced with a configuration in which the corrugated leaf spring 15 is provided independently for each rolling groove 14 in the case of FIG. The spring 15 is formed in a cylindrical shape. As shown in the drawing, when the axial cut-off portion 28 is formed at one location, the overall deformation amount increases. FIG. 10C shows the case where the positions of the interference protrusion 4 and the groove 6 are reversed.

Sectional view of Example 1 FIG. 1 is a partially omitted sectional view taken along line XX in FIG. (A) Partially enlarged sectional view of FIG. 1, (b) Enlarged perspective view of leaf spring (A) to (c) Partially enlarged sectional view of a modification of the first embodiment (A) Sectional view of Example 2, (b) Enlarged perspective view of leaf spring (A) Sectional drawing of the modification of Example 2, (b) The expansion perspective view of a leaf | plate spring (A) (b) Sectional drawing of the other modification of Example 2 (A) Sectional view of Example 3, (b) Partially omitted sectional view of line YY in (a) Sectional drawing of the modification of Example 3 (A) Partially omitted sectional view of Example 4, (b) Perspective view of leaf spring, (c) Partially omitted sectional view of a modification of Example 4

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer outer ring 2 Inner outer ring 3 Fitting surface 4 Interference protrusion 5 Fitting surface 6 Groove 7 Plate spring 8 Outer ring 9, 9 'Clearance 10 Projection 11 Curved part 12, 12' Elastic deformation part 14 Rolling groove 15 Plate spring 16 Bending parts 18, 18 'Elastic deformation part 19 Outer ring shaft 21 Steel ball 22 Groove wall surface 23 Inner ring shaft 24 Boot 25 Inner ring 26 Curved part 27 Slit 28 Detachment part

Claims (5)

  The outer outer ring and the inner outer ring are fitted inside and outside with a required gap, a plurality of axial interference protrusions on one of the outer outer ring and the inner outer ring, and the interference on the other fitting face A groove facing the ridge is provided, a vibration isolating material is interposed between the fitting surfaces, the outer outer ring and the inner outer ring are integrated via the vibration isolating material, and steel is formed on the inner surface of the inner outer ring. In an outer ring for a constant velocity joint in which a plurality of ball rolling grooves are formed, the vibration isolating material is formed by a leaf spring, and the leaf spring is provided with an elastic deformation portion that is compressed between the two fitting surfaces. An outer ring for a constant velocity joint.   2. The constant velocity according to claim 1, wherein the leaf spring has a curved portion straddling the interference protrusion, and both side portions of the curved portion are folded, and the elastic deformation portion is provided by the folding. Joint outer ring.   2. The constant velocity joint outer ring according to claim 1, wherein the leaf spring is corrugated, and the elastic deformation portion is provided by the corrugation.   The leaf spring has a curved portion interposed between the adjacent interference protrusions, and a bent portion engaged with the groove, and a distal end portion of the bent portion is folded, and the elastic portion is bent by the folding. The outer ring for a constant velocity joint according to claim 1, further comprising a deforming portion.   The leaf spring has a curved portion interposed between the adjacent interference protrusions, and a bent portion engaged with the groove, and the entire leaf spring is corrugated. The constant velocity joint outer ring according to claim 1, wherein the elastic deformation portion is formed.

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