JP2010112474A - Boot mounting structure and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a boot mounting structure having reduced manufacturing cost while securing boot anti-come-off strength and sealing performance. <P>SOLUTION: In the boot mounting structure, a cylindrical boot fixing part 10 provided at the end of a boot 1 is fitted to a mounting outer peripheral face 20 of a mating member 2 and fastening force is given to a boot band 3 arranged on the outer peripheral face of the boot fixing part 10 to fix the boot fixing part 10 to the mounting outer peripheral face 20. On a smooth surface 22 of the mounting outer peripheral face 20, an annular engaging groove 21 is formed continuous to the smooth surface 22. On the inner peripheral face of the boot band 3, a projection 30 is formed in opposition to the engaging groove 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a boot mounting structure to be mounted on a constant velocity universal joint for automobiles, and a method thereof.

  In constant velocity universal joints used in automobiles, boots are installed to prevent leakage of grease sealed in the joint between the outer joint member and the shaft and to prevent foreign matter from entering the joint. It is installed.

  As shown in FIG. 13, the constant velocity universal joint boot 100 includes a small diameter portion 101 fixed to the shaft 200, a large diameter portion 102 fixed to the outer joint member 300, a large diameter portion 102, and a small diameter portion 101. And an accordion portion 103 provided between the two. To attach the boot to the shaft, the small diameter portion 101 is fitted to the outer periphery of the shaft 200, and then the small diameter portion 101 is fastened by the boot band 400 and fixed to the shaft 200. Similarly, when attaching the boot to the outer joint member, the large diameter portion 102 is fitted to the outer periphery of the outer joint member 300, and then the large diameter portion 102 is fastened by the boot band 500 and fixed to the outer joint member 300.

  By the way, as a conventional boot mounting structure, there is one in which an annular engagement groove is formed on a mounting outer peripheral surface for mounting a boot of a shaft or an outer joint member (see Patent Document 1). FIG. 14 shows a conventional example in which an annular engagement groove 200b is formed on the mounting outer peripheral surface 200a of the shaft 200. FIG. As shown in FIG. 14, in this boot mounting structure, the small-diameter portion 101 of the boot 100 is tightened by the boot band 400, whereby the small-diameter portion 101 is elastically deformed and engaged with the engagement groove 200b. This makes it difficult for the boot to come off the shaft and the outer joint member, and improves the sealing performance.

Further, a boot mounting structure has been proposed in which a protrusion is formed on the groove shoulder of an engaging groove formed on the mounting outer peripheral surface of a shaft or an outer joint member (see Patent Document 2). FIG. 15 shows a conventional example in which a protrusion 200c is formed on the groove shoulder of the engagement groove 200b formed on the mounting outer peripheral surface 200a of the shaft 200. As shown in FIG. 15, in this case, when the small-diameter portion 101 of the boot 100 is tightened by the boot band 400, the pressure contact force of the small-diameter portion 101 is locally increased at the position of the protrusion 200c. The retaining strength and sealing performance of the boot can be improved as compared with the mounting structure.
JP-A-7-145863 Japanese Patent No. 3333310

  However, what provided the protrusion part in the shoulder part of the engagement groove | channel shown in FIG. 15 becomes complicated compared with the thing which does not provide a protrusion part in the shoulder part of the engagement part shown in FIG. In general, the engagement grooves and the protrusions formed in the shaft and the outer joint member are formed by cutting. As shown in FIG. 16 (A), when the protrusion is provided, it is necessary to process from a material having a maximum outer diameter φA of the protrusion, whereas as shown in FIG. 16 (B) When the portion is not provided, it is possible to manufacture a material having an outer diameter φB that is smaller than the maximum outer diameter φA when the protrusion is provided. Therefore, when the protrusion is provided, a material having a large diameter must be used as compared with the case where the protrusion is not provided, and there is a problem that the cost is increased.

  SUMMARY OF THE INVENTION In view of such circumstances, the present invention provides a boot mounting structure and a method thereof that can secure the boot retaining strength and sealing performance of the boot and can reduce the manufacturing cost.

  According to the first aspect of the present invention, a cylindrical boot fixing portion provided at the end of the boot is fitted to the mounting outer peripheral surface of the mating member, and a tightening force is applied to the boot band disposed on the outer peripheral surface of the boot fixing portion. In the boot mounting structure in which the boot fixing portion is fixed to the mounting outer peripheral surface, an annular engagement groove is formed on the smooth surface of the mounting outer peripheral surface so as to be continuous with the smooth surface. A convex portion is formed on the inner peripheral surface of the band so as to face the engagement groove.

  In the present invention, since the convex portion is formed on the inner peripheral surface of the boot band, the boot fixing portion can be pushed into the engaging groove formed in the mating member by the convex portion. As a result, the boot can be securely fixed to the mating member, and it is possible to ensure the retaining strength and the sealing performance of the boot.

  According to a second aspect of the present invention, in the boot mounting structure according to the first aspect, a cross section of the engagement groove is formed in a concave arc shape, and a cross section of the convex portion is formed in a convex arc shape. The radius of curvature is larger than the radius of curvature of the engagement groove.

  By setting the radius of curvature of the convex portion to be larger than the radius of curvature of the engaging groove, the boot fixing portion can be strongly pressed against the corners at both ends of the engaging groove by the convex portion. As described above, the press-contact force of the boot fixing portion by the boot band is locally increased at the corners at both ends of the engagement groove, whereby the boot retaining strength and the sealing performance can be improved.

  According to a third aspect of the present invention, in the boot mounting structure according to the first aspect, the cross-section of the engagement groove is inclined with respect to the radial direction of the counterpart member, and the inclined surface is provided on the inclined surface. It is constituted by a continuous concave arcuate surface.

  When the cross section of the engaging groove is formed in a concave arc shape as a whole and the radius of curvature is small, it is necessary to perform one copy turning process for the convenience of the mounting angle of the turning tool (turning blade). The groove may not be formed, and the processing time becomes long. Therefore, by forming the cross-sectional shape of the engaging groove by the inclined surface and the concave arcuate surface, it can be formed by one-time profile turning. This makes it possible to shorten the processing time.

  According to a fourth aspect of the present invention, in the boot mounting structure according to any one of the first to third aspects, a protrusion is provided in the engagement groove.

  By providing the protrusion in the engagement groove, the boot fixing portion can be strongly pressed against the protrusion. As described above, since the press contact force of the boot fixing portion can be locally increased at the position of the protrusion portion of the engagement groove, the boot retaining strength and the sealing performance can be improved.

  According to a fifth aspect of the present invention, in the boot mounting structure according to any one of the first to fourth aspects, the mating member is a shaft connected to an inner joint member of a constant velocity universal joint.

  The configuration of the present invention can be applied to a shaft and boot mounting structure.

  A sixth aspect of the present invention is the boot mounting structure according to any one of the first to fourth aspects, wherein the mating member is an outer joint member of a constant velocity universal joint.

  The configuration of the present invention can be applied to an outer joint member and boot mounting structure.

  A seventh aspect of the present invention is the boot mounting structure according to any one of the first to sixth aspects, wherein the boot is made of a resin material.

  A resin material can be applied as a boot material.

  The invention of claim 8 is the boot mounting structure according to any one of claims 1 to 6, wherein the boot is made of a rubber material.

  A rubber material can be applied as a boot material.

  According to the ninth aspect of the present invention, an annular engagement groove is formed on the smooth surface of the mounting outer peripheral surface of the mating member to which the boot is mounted in advance so as to be continuous with the smooth surface. When the boot band is disposed on the outer peripheral surface of the cylindrical boot fixing portion provided at the end of the boot and the boot fixing portion is fitted to the mounting outer peripheral surface of the mating member The convex portion is disposed so as to oppose the engaging groove, and by applying a tightening force to the boot band, the outer peripheral surface of the boot fixing portion is pressed by the convex portion to thereby press the boot fixing portion. This is a boot attachment method in which the inner peripheral surface of the boot fixing portion is engaged with the engagement groove by being pushed into the engagement groove.

  By pushing the boot fixing portion into the engaging groove formed in the mating member by the convex portion, the boot can be securely fixed to the mating member, and the boot retaining strength and sealing performance can be secured. .

  The invention according to claim 10 is a cylindrical shape in which an annular engagement groove is formed in advance on the smooth surface of the mounting outer peripheral surface of the mating member to which the boot is mounted, and is provided at the end of the boot. The boot band is disposed on the outer peripheral surface of the boot fixing portion, and the boot fixing portion is fitted to the mounting outer peripheral surface of the mating member, and the boot band is crimped from the outer periphery to exert a tightening force on the boot band. When the boot band is caulked, the outer peripheral surface of the boot fixing portion is pressed by the convex portion formed on the inner peripheral surface of the boot band and the boot fixing portion is pushed into the engagement groove. This is a method of attaching a boot in which the inner peripheral surface of the boot fixing portion is engaged with the engagement groove.

  By pushing the boot fixing portion into the engaging groove formed in the mating member by the convex portion, the boot can be securely fixed to the mating member, and the boot retaining strength and sealing performance can be secured. . Moreover, in this method, since the convex portion is formed on the boot band by caulking when the tightening force is applied to the boot band, the step of forming the convex portion on the boot band in advance is not necessary. Thereby, cost reduction can be aimed at.

  Since the present invention does not have a projection on the groove shoulder of the engagement groove, the structure can be simplified and the manufacture is easy as compared with the conventional example in which the projection is provided on the groove shoulder of the engagement groove. . Further, the present invention can use a material having a small outer diameter when cutting the mating member, as compared with the conventional example in which the protrusion is provided on the groove shoulder of the engaging groove, thereby reducing the manufacturing cost. It is possible. Further, the present invention can securely fix the boot to the mating member by forming the protrusion on the inner peripheral surface of the boot band without providing a protrusion on the groove shoulder of the engagement groove. It is possible to ensure the retaining strength and sealing performance of the.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 and 2 show a first embodiment of a boot mounting structure according to the present invention. In this boot mounting structure, a cylindrical boot fixing portion 10 provided at an end of a boot 1 is connected to an inner joint of a constant velocity universal joint. It is a structure for attaching to the shaft 2 connected to the member. The overall configuration of the boot 1 is the same as the boot described in FIG. 13, the small diameter portion as the boot fixing portion 10 fixed to the shaft 2 and the large diameter portion fixed to the outer joint member (not shown). And a bellows part (not shown) provided between the large diameter part and the small diameter part.

  An annular engagement groove 21 is formed on the mounting outer peripheral surface 20 to which the boot fixing portion 10 of the shaft 2 is attached. The cross section of the engagement groove 21 is formed in a concave arc shape. Except for the portion where the engaging groove 21 is formed on the mounting outer peripheral surface 20, the smooth surface 22 has no irregularities, and the engaging groove 21 is formed continuously with the smooth surface 22. That is, the shaft 2 according to the present invention does not have a protrusion on the groove shoulder of the engagement groove, unlike the conventional shaft described in FIG.

  On the outer peripheral surface of the boot fixing portion 10, a boot band 3 made of, for example, a strip-shaped member made of sheet metal is attached. Further, a convex portion 30 is formed across the longitudinal direction of the boot band 3 at the center in the width direction of the inner peripheral surface of the boot band 3. This convex part 30 is formed by denting the width direction center part of the outer peripheral surface of the boot band 3 with a press machine etc., for example. The cross section of the convex portion 30 has a convex arc shape.

  As shown in FIG. 2, the curvature radius R <b> 2 of the convex portion 30 is set to be larger than the curvature radius R <b> 1 of the engagement groove 21.

FIG. 3 shows a second embodiment of the boot mounting structure of the present invention.
As shown in FIG. 3A, in the second embodiment as well, in the same manner as the first embodiment shown in FIG. 1, an annular engagement groove 21 is provided on the smooth surface 22 of the mounting outer peripheral surface 20 of the shaft 2 as a smooth surface. 22 to be continuous. The boot band 3 is attached to the outer peripheral surface of the boot fixing portion 10, and a convex portion 30 is formed on the inner peripheral surface of the boot band 3 in the longitudinal direction of the boot band 3.

  In the second embodiment, the cross section of the convex portion 30 formed on the boot band 3 is formed in a convex arc shape as in the first embodiment. On the other hand, the cross section of the engaging groove 21 formed in the shaft 2 is formed in a shape different from that of the first embodiment.

  Specifically, as shown in FIG. 3 (B), the cross section of the engagement groove 21 is inclined with respect to a straight line L indicating the radial direction of the shaft 2 and an inclined surface 21a disposed so as to enter the inside. The concave arcuate surface 21b is continuous with the inclined surface 21a.

  Further, as shown in FIG. 3C, the positions of the inclined surface 21a and the concave arcuate surface 21b may be exchanged with each other in the axial direction of the shaft 2 (left-right direction in the figure).

4 and 5 show a third embodiment of the boot mounting structure of the present invention.
As shown in FIG. 4, in the third embodiment, an annular protrusion 23 is provided in an engagement groove 21 formed in the shaft 2. In FIG. 4, the same reference numerals as those in FIG. 1 other than the protrusions 23 have the same configuration as that in FIG. 1.

  As shown in FIG. 5, the protrusion 23 is preferably disposed on a radial straight line M passing through the center portion in the width direction of the boot band 3. A plurality of the protrusions 23 may be disposed in the engagement groove 21 (not shown). Similarly to the first embodiment, the curvature radius R2 of the convex portion 30 is set larger than the curvature radius R1 of the engagement groove 21.

  The boot mounting structure according to each embodiment of the present invention can also be applied to the mounting structure of the outer joint member of the constant velocity universal joint and the boot. Hereinafter, an embodiment in which the boot mounting structure of the present invention is applied to a mounting structure of an outer joint member and a boot will be described with reference to FIGS.

FIG. 6 shows an embodiment in which the boot mounting structure of the first embodiment shown in FIGS. 1 and 2 is applied to the mounting structure of the outer joint member and the boot.
As shown in FIG. 6, an annular engagement groove 41 is formed on the smooth surface 42 of the mounting outer peripheral surface 40 of the outer joint member 4 so as to be continuous with the smooth surface 42. A boot band 3 is mounted on the outer peripheral surface of the boot fixing portion (large diameter portion) 11, and a convex portion 30 is formed on the inner peripheral surface of the boot band 3 along the longitudinal direction of the boot band 3. . Similarly to FIG. 2, the curvature radius of the convex portion 30 is set larger than the curvature radius of the engagement groove 41.

7 and 8 show an embodiment in which the boot mounting structure of the second embodiment shown in FIG. 3 is applied to the mounting structure of the outer joint member and the boot.
In this embodiment, a cross section of the engaging groove 41 formed in the outer joint member 4 is inclined with respect to the radial direction of the outer joint member 4, and a concave continuous with the inclined surface 41a. An arcuate surface 41b is used. Further, as shown in FIGS. 7 and 8, the positions of the inclined surface 41a and the concave arcuate surface 41b may be exchanged with each other in the axial direction of the outer joint member 4 (left-right direction in the figure). 7 and 8, the same reference numerals as in FIG. 6 have the same configuration as in FIG.

FIG. 9 shows an embodiment in which the boot mounting structure of the third embodiment shown in FIGS. 4 and 5 is applied to the mounting structure of the outer joint member and the boot.
As shown in FIG. 9, an annular protrusion 43 is provided in the engagement groove 41 formed in the outer joint member 4. Moreover, it is preferable to arrange | position the projection part 43 on the radial straight line (illustration omitted) which passes the width direction center part of the boot band 3 similarly to FIG. A plurality of the protrusions 43 may be disposed in the engagement groove 41 (not shown).

  Moreover, the raw material of the boot 1 used for this invention can apply resin materials, or rubber materials, such as chloroprene rubber and silicone rubber.

  Hereinafter, the boot mounting method of the present invention will be described. The boot mounting method of the present invention may be performed in the same manner in each of the above-described embodiments of the present invention. Therefore, here, the boot mounting method will be described using the first embodiment described in FIGS. 1 and 2 as an example.

  On the outer peripheral surface of the boot fixing portion 10 of the boot 1 shown in FIG. 10A, a boot band 3 having a convex portion 30 formed in advance on the inner peripheral surface is disposed. Next, the boot fixing portion 10 is fitted to the mounting outer peripheral surface 20 of the shaft 2 in which the engagement groove 21 is formed in advance. At this time, as shown in FIG. 10A, the convex portion 30 of the boot band 3 is disposed so as to face the engagement groove 21 of the shaft 2. The boot band 3 may be disposed on the outer peripheral surface of the boot fixing portion 10 after the boot fixing portion 10 is fitted to the mounting outer peripheral surface 20 of the shaft 2.

  Then, as shown in FIG. 10B, a tightening force is applied to the boot band 3. At this time, the convex portion 30 of the boot band 3 presses the outer peripheral surface of the boot fixing portion 10, thereby pushing the boot fixing portion 10 into the engaging groove 21, and the inner peripheral surface of the boot fixing portion 10 is engaged with the engaging groove 21. Engage with.

Next, another boot mounting method of the present invention will be described.
The boot band 3 is disposed on the outer peripheral surface of the boot fixing portion 10 of the boot 1 shown in FIG. Next, the boot fixing portion 10 is fitted to the mounting outer peripheral surface 20 of the shaft 2 in which the engagement groove 21 is formed in advance. In this attachment method, unlike the attachment method, the protrusion 30 is not formed in advance on the inner peripheral surface of the boot band 3. Further, after the boot fixing portion 10 is fitted to the mounting outer peripheral surface 20 of the shaft 2, the boot band 3 may be disposed on the outer peripheral surface of the boot fixing portion 10.

  Then, as shown in FIG. 11 (B), the boot band 3 is caulked from the outer periphery to apply a tightening force to the boot band 3. When the boot band 3 is caulked, the outer peripheral surface of the boot band 3 is pressed to form the concave portion 31, so that the convex portion 30 is simultaneously formed on the inner peripheral surface of the boot band 3. The convex portion 30 formed by caulking presses the outer peripheral surface of the boot fixing portion 10, thereby pushing the boot fixing portion 10 into the engaging groove 21, and the inner peripheral surface of the boot fixing portion 10 is engaged with the engaging groove 21. Engage with.

  As described above, according to the present invention, by forming the convex portion 30 on the boot band 3, the boot fixing portion 10 can be pushed into the engagement groove 21 formed on the shaft 2 by the convex portion 30. As a result, the boot 1 can be reliably fixed to the shaft 2 and the retaining strength and sealing performance of the boot 1 can be ensured.

  Further, in the present invention, as described with reference to FIG. 2, the curvature radius R <b> 2 of the convex portion 30 is set larger than the curvature radius R <b> 1 of the engagement groove 21. For this reason, as shown in FIGS. 10B and 11B, the boot fixing portion 10 is particularly strongly pressed against the corner portions 21 c at both ends of the engagement groove 21. In this manner, the retaining strength and the sealing performance of the boot 1 can be improved by locally increasing the pressure contact force of the boot fixing portion 10 at the corner portions 21c at both ends of the engagement groove 21.

  Further, in the method of forming the convex portion 30 on the inner peripheral surface of the boot band 3 by caulking for applying a tightening force to the boot band 3, the step of forming the convex portion 30 on the boot band 3 in advance is unnecessary. Therefore, cost reduction can be achieved.

  Further, as shown in FIG. 12, in the case of the embodiment in which the protrusion 23 is formed in the engagement groove 21, the boot fixing portion 10 is engaged by pressing the boot fixing portion 10 with the convex portion 30 of the boot band 3. Strong press-contact is made at the three locations of the projection 23 of the joint groove 21 and the corners 21c at both ends. Thereby, the retaining strength and sealing performance of the boot 1 can be further improved.

  Further, as described with reference to FIG. 5, when the protrusion 23 is disposed on the radial straight line M (hereinafter referred to as the width direction center line) passing through the center portion in the width direction of the boot band 3, the constant velocity can be freely set. Even when the joint is rotated at an operating angle, it is possible to exhibit good retaining properties and sealing properties. This is because when the constant velocity universal joint rotates with an operating angle, the expansion and contraction motion of the boot 1 is small on the center line M in the width direction of the boot band 3, so that the protrusion 23 is located at a position where the expansion and contraction motion of the boot 1 is small. This is because it is possible to maintain a high pressing force on the projecting portion 23 by arranging.

  In addition, it can carry out similarly to the above also about the attachment method of an outer joint member and a boot, and about the effect | action and effect accompanying it, the same effect | action and effect can be exhibited.

  Since the present invention does not have a protrusion on the groove shoulder of the engagement groove, the structure can be simplified compared to the conventional example (see FIG. 15) in which the protrusion is provided on the groove shoulder of the engagement groove. Manufacturing is easy. In addition, the present invention can use a material having a small outer diameter when cutting a shaft or an outer joint member, as compared with the conventional example in which a protrusion is provided on the groove shoulder of the engaging groove, and the manufacturing cost can be reduced. Can be reduced. In addition, when a projection part is formed in the engagement groove (see FIG. 5), it is preferable to dispose the tip of the projection part so as not to protrude from the smooth surface in order to use a material having a small outer diameter. Further, the present invention can securely fix the boot to the shaft or the outer joint member by forming the convex portion on the inner peripheral surface of the boot band without providing a protrusion on the groove shoulder of the engagement groove. It is possible to secure the boot retaining strength and sealability.

  Also, as in the embodiment shown in FIG. 1, when the cross section of the engaging groove is formed in a concave arc shape as a whole and the radius of curvature is small, the mounting angle of the turning tool (turning blade) For this reason, the engagement groove may not be formed by one copying turning process, and the processing time becomes long. Therefore, by forming the cross-sectional shape of the engaging groove by an inclined surface and a concave arcuate surface as shown in FIG. 3, it can be formed by one-time copying turning. This makes it possible to shorten the processing time.

  While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Further, the configuration of the present invention is not limited to the boot mounting structure in the constant velocity universal joint for automobiles, but can be applied to the boot mounting structure in other various industrial machines.

It is sectional drawing which shows the example which applied 1st Embodiment of the boot attachment structure of this invention to the attachment structure of a shaft and a boot. It is sectional drawing for demonstrating the relationship between the curvature radius of a convex part, and the curvature radius of an engagement groove | channel. (A) is sectional drawing which shows an example by applying 2nd Embodiment of the boot attachment structure of this invention to the attachment structure of a shaft and a boot, (B) is an enlarged view of the principal part of (A). (C) is an enlarged view showing a modification of the main part of (A). It is sectional drawing which shows the example which applied 3rd Embodiment of the boot attachment structure of this invention to the attachment structure of a shaft and a boot. It is sectional drawing for demonstrating the relationship between the curvature radius of a convex part, and the curvature radius of an engagement groove | channel, and the arrangement position of a projection part. It is sectional drawing which shows the example which applied 1st Embodiment of the boot attachment structure of this invention to the attachment structure of an outer joint member and a boot. It is sectional drawing which shows the example which applied 2nd Embodiment of the boot attachment structure of this invention to the attachment structure of an outer joint member and a boot. It is sectional drawing which shows the modification which applied 2nd Embodiment of the boot attachment structure of this invention to the attachment structure of an outer joint member and a boot. It is sectional drawing which shows the example which applied 3rd Embodiment of the boot attachment structure of this invention to the attachment structure of an outer joint member and a boot. It is a figure for demonstrating the boot attachment method of this invention, Comprising: (A) is sectional drawing which shows the state before making a fastening force act on a boot band, (B) makes a fastening force act on a boot band, and boots It is sectional drawing which shows the state which fixed to the shaft. It is a figure for demonstrating another boot attachment method of this invention, Comprising: (A) is sectional drawing which shows the state before making a fastening force act on a boot band, (B) makes a fastening force act on a boot band. It is sectional drawing which shows the state which fixed the boot to the shaft. It is sectional drawing for demonstrating the effect | action of embodiment which provided the projection part in the engagement groove | channel. It is sectional drawing which shows the state which attached the boot to the joint part of the outer joint member of a constant velocity universal joint, and a shaft. It is sectional drawing which shows an example of the conventional boot attachment structure. It is sectional drawing which shows the other example of the conventional boot attachment structure. (A) is a figure for demonstrating the outer diameter of the raw material required in order to manufacture the shaft which provided the projection part in the groove shoulder of the engagement groove, (B) has provided the projection part in the groove shoulder of the engagement groove It is a figure for demonstrating the outer diameter of the raw material required in order to manufacture a shaft which is not.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Boot 2 Shaft 3 Boot band 4 Outer joint member 10 Boot fixing part 11 Boot fixing part 20 Mounting outer peripheral surface 21 Engaging groove 22 Smooth surface 23 Protruding part 30 Protruding part 40 Mounting outer peripheral surface 41 Engaging groove 42 Smooth surface 43 Protruding part R1 radius of curvature R2 radius of curvature

Claims (10)

By fixing a cylindrical boot fixing portion provided at the end of the boot to the mounting outer peripheral surface of the mating member and applying a tightening force to a boot band disposed on the outer peripheral surface of the boot fixing portion, the boot fixing In the boot mounting structure in which the part is fixed to the mounting outer peripheral surface,
An annular engaging groove is formed on the smooth surface of the mounting outer peripheral surface so as to be continuous with the smooth surface, and a convex portion is formed on the inner peripheral surface of the boot band so as to face the engaging groove. Boot mounting structure characterized by   The cross section of the engaging groove is formed in a concave arc shape, the cross section of the convex portion is formed in a convex arc shape, and the radius of curvature of the convex portion is larger than the radius of curvature of the engaging groove. The boot mounting structure described.   2. The boot mounting structure according to claim 1, wherein a cross section of the engagement groove is constituted by an inclined surface arranged to be inclined with respect to a radial direction of the counterpart member and a concave arcuate surface continuous to the inclined surface. .   The boot mounting structure according to claim 1, wherein a protrusion is provided in the engagement groove.   The boot attachment structure according to any one of claims 1 to 4, wherein the counterpart member is a shaft connected to an inner joint member of a constant velocity universal joint.   The boot attachment structure according to any one of claims 1 to 4, wherein the counterpart member is an outer joint member of a constant velocity universal joint.   The boot mounting structure according to claim 1, wherein the boot is made of a resin material.   The boot mounting structure according to any one of claims 1 to 6, wherein the boot is made of a rubber material. In advance, on the smooth surface of the mounting outer peripheral surface of the mating member to which the boot is attached, an annular engagement groove is formed so as to be continuous with the smooth surface, and a convex portion is formed on the inner peripheral surface of the boot band,
When the boot band is disposed on the outer peripheral surface of the cylindrical boot fixing portion provided at the end of the boot, and when the boot fixing portion is fitted to the mounting outer peripheral surface of the counterpart member, the convex portion is Arranged to face the engagement groove,
By applying a tightening force to the boot band, the outer peripheral surface of the boot fixing portion is pressed by the convex portion to push the boot fixing portion into the engagement groove, and the inner peripheral surface of the boot fixing portion is A boot mounting method characterized by engaging with an engaging groove. In advance, on the smooth surface of the mounting outer peripheral surface of the mating member to which the boot is mounted, an annular engagement groove is formed so as to be continuous with the smooth surface,
While disposing the boot band on the outer peripheral surface of the cylindrical boot fixing portion provided at the end of the boot, fitting the boot fixing portion to the mounting outer peripheral surface of the counterpart member,
The outer peripheral surface of the boot fixing portion is formed by a convex portion formed on the inner peripheral surface of the boot band when the boot band is tightened from the outer periphery to exert a tightening force on the boot band. A method of attaching a boot, wherein the boot fixing portion is pushed into the engaging groove to engage the inner peripheral surface of the boot fixing portion with the engaging groove.

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