JP5260248B2 - Friction ring gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction ring gear preventing a friction ring from relatively rotating relative to a gear body in the operation. <P>SOLUTION: The friction ring gear 10 is provided with: a gear body 4 for integrally supporting a ring part 2 having a gear tooth at the periphery by a hub 3, and a friction ring 6 internally fitted and installed in an annular groove 5 formed in the inner periphery of the ring part 2 of the gear body 4 in a compressed state, and press-fitted to the annular groove 5 by the restoring force. In the friction ring gear 10, friction is generated between the friction ring 6 and the annular groove 5 for vibration in the axial direction of the gear body 4 so as to enable vibration suppression. A friction ring 6 is prevented from relatively rotating relative to the gear body 4, and one (a projected part 8) of the projected part 8 and recessed part 9 fitted so as to permit displacement in the axial direction is provided in the friction ring 6 side and the other side (the recessed part 9) is provided in the gear body 4 side. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a friction ring gear.

  FIGS. 6 to 8 show an example of a conventional friction ring gear. This type of friction ring gear 1 includes a gear body 4 in which a ring portion 2 having gear teeth on the outer periphery thereof is integrally supported by a hub 3; The gear body 4 includes a friction ring 6 that is fitted in a compressed state in an annular groove 5 formed on the inner periphery of the ring portion 2 of the gear body 4 and is pressed against the annular groove 5 by its restoring force. Is generated between the friction ring 6 and the annular groove 5 to absorb vibration energy, and thereby the axis of the gear body 4 is axially centered (see arrow A in FIG. 7). The vibration of the direction can be controlled.

  Here, the friction ring 6 is formed in a C-shape in which a part in the circumferential direction is opened. For example, the timing adjustment hole 7 (a rod-shaped jig is inserted into the gear body 4 as appropriate. Hole for confirming whether or not the gear phase is correct: If the gear phase is appropriate, a jig can be inserted into the reference hole in the fixed part at the end of the timing adjustment hole 7). In this case, as shown in FIG. 9, the opening portion in the circumferential direction of the friction ring 6 is aligned with the position of the timing adjusting hole 7, and the friction ring 6 is mounted in a state where the timing adjusting hole 7 can be used. It is like that.

The prior art document information related to the present invention includes the following Patent Document 1 and Patent Document 2.
Japanese Utility Model Publication No. 63-187747 Japanese Utility Model Publication No. 63-187748

  However, in the conventional friction ring gear 1, the friction ring 6 rotates relative to the gear body 4 during operation, and wear of both the gear body 4 and the friction ring 6 is promoted. In particular, when the gear body 4 is provided with the timing adjustment hole 7, there is a problem that the timing adjustment hole 7 is hidden by the friction ring 6 and cannot be used as shown in FIG.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a friction ring gear capable of preventing the friction ring from rotating relative to the gear body during operation.

  The present invention includes a gear body in which a ring portion having gear teeth on the outer periphery is integrally supported by a hub, and an annular groove formed on the inner periphery of the ring portion of the gear body, and is fitted in a compressed state. A friction ring gear comprising a friction ring pressed against the annular groove by a restoring force and capable of suppressing vibration by generating friction between the friction ring and the annular groove against vibration in the axial direction of the gear body. In order to prevent relative rotation of the friction ring with respect to the gear body and to allow displacement in the axial direction, one of the convex part and the concave part is provided on the friction ring side and the other is provided on the gear main body side. It is characterized by that.

  Thus, when the convex portion is fitted into the concave portion, the relative rotation of the friction ring with respect to the gear main body is prevented, and wear of the gear main body and the friction ring is suppressed. Since the axial displacement of the friction ring is allowed, the friction is generated between the friction ring and the annular groove in the conventional manner with respect to the vibration of the gear body in the axial direction. The vibration in the axial direction of the main body is suppressed.

  Furthermore, when concretely implementing the present invention, for example, a convex portion that protrudes outward in the radial direction is provided at an appropriate position in the circumferential direction of the friction ring, and a concave portion is formed at a position corresponding to the convex portion on the gear body side. It is possible to provide a convex portion that protrudes in one axial direction at an appropriate position in the circumferential direction of the friction ring, and to provide a concave portion at a position corresponding to the convex portion on the gear body side. .

According to the above-described friction ring gear of the present invention, the axial displacement of the friction ring with respect to the gear body is allowed, so that the friction ring and the annular groove are free from vibrations in the axial direction of the gear body. In the meantime, friction is generated in the conventional manner, and vibration energy is absorbed to suppress the vibration in the axial direction of the gear body , and the relative rotation of the friction ring with respect to the gear body is prevented and the gear is prevented. Since the wear of the main body and the friction ring can be suppressed, it is possible to maintain a good pressure contact state of the friction ring against the annular groove of the gear main body and ensure a good vibration damping effect over a long period of time. For the gear body with a timing adjustment hole, the open part of the friction ring in the circumferential direction It is possible to hold the position of the timing alignment holes, can achieve equal various excellent effects which can be used at all times without any trouble this time alignment hole.

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

  1 and 2 show an example of an embodiment for carrying out the present invention, and portions denoted by the same reference numerals as those in FIGS. 6 to 10 represent the same items.

  As shown in FIGS. 1 and 2, in the friction ring gear 10 of this embodiment shown here, the gear teeth are arranged on the outer periphery in the same manner as in the case of the conventional friction ring gear 1 described above with reference to FIGS. The ring portion 2 of the gear body 4 is integrally supported by the hub 3 and the annular groove 5 formed in the inner periphery of the ring portion 2 of the gear body 4 is fitted in a compressed state and its restoring force. And a friction ring 6 in pressure contact with the annular groove 5 so that vibration can be generated between the friction ring 6 and the annular groove 5 to suppress vibration in the axial direction of the gear body 4. However, a convex portion 8 that protrudes outward in the radial direction is newly provided on the outer peripheral edge of the friction ring 6 at an appropriate position in the circumferential direction, and a ring corresponding to the convex portion 8 on the gear body 4 side is provided. The convex portion 8 to be fitted to recess 9 is provided in an appropriate position in the groove 5.

  Here, the concave portion 9 on the gear body 4 side extends in the axial direction of the gear body 4 with a sufficient length so as not to restrain the displacement of the friction ring 6 in the axial direction, and the convex portion on the friction ring 6 side. 8 and the recess 9 on the gear body 4 side prevent the relative rotation of the friction ring 6 with respect to the gear body 4, while allowing the axial displacement of the friction ring 6.

  Thus, when the convex portion 8 on the friction ring 6 side and the concave portion 9 on the gear main body 4 side are fitted, the relative rotation of the friction ring 6 with respect to the gear main body 4 is prevented. While the wear of the gear body 4 and the friction ring 6 is suppressed, the axial displacement of the friction ring 6 with respect to the gear body 4 is allowed. Friction is generated between the annular groove 5 and the vibration energy is absorbed, thereby suppressing the vibration of the gear body 4 in the axial direction.

Therefore, according to the above embodiment, the vibration in the axial direction of the gear body 4 is suppressed by generating friction between the friction ring 6 and the annular groove 5 in the conventional manner with respect to the vibration in the axial direction of the gear body 4. In addition, since the relative rotation of the friction ring 6 with respect to the gear body 4 can be prevented and wear of the gear body 4 and the friction ring 6 can be suppressed, the friction ring with respect to the annular groove 5 of the gear body 4 can be suppressed. The sound pressure contact state of 6 can be maintained and a good vibration damping effect can be ensured over a long period of time.

  Further, as in the example shown here, especially in the case where the gear main body 4 is provided with the timing adjusting hole 7, the opening portion in the circumferential direction of the friction ring 6 is located at the position of the timing adjusting hole 7. Since it can hold | maintain, there also exists a merit that this timing alignment hole 7 can always be used without trouble.

  3 to 5 show another embodiment of the present invention. A convex portion 8 projecting to one side in the axial direction is provided on one end surface of the friction ring 6 at an appropriate position in the circumferential direction, and the gear body 4 side is provided. The concave portion 9 that can be fitted to the convex portion 8 is provided at a position corresponding to the convex portion 8.

  Here, the concave portion 9 on the gear body 4 side extends in the axial direction of the gear body 4 with a sufficient length so as not to restrain the displacement of the friction ring 6 in the axial direction, and the convex portion on the friction ring 6 side. 8 and the recess 9 on the gear body 4 side prevent the relative rotation of the friction ring 6 with respect to the gear body 4 while allowing the friction ring 6 to be displaced in the axial direction of the gear body 4. To get.

Accordingly, even in this case, the friction between the friction ring 6 and the annular groove 5 is generated in the conventional manner with respect to the vibration in the axial direction of the gear body 4 to suppress the vibration in the axial direction of the gear body 4. Further, the friction of the friction ring 6 with respect to the gear body 4 can be prevented and the wear of the gear body 4 and the friction ring 6 can be suppressed. The sound pressure contact state of the ring 6 can be maintained and a good vibration damping effect can be ensured over a long period of time.

  Note that the friction ring gear of the present invention is not limited to the above-described embodiment, and may be provided with a convex portion on the gear body side and a concave portion on the friction ring side, contrary to the illustrated example. Of course, various modifications can be made without departing from the scope of the present invention.

It is sectional drawing which shows an example of the form which implements this invention. It is a front view of the friction ring of FIG. It is sectional drawing which shows another example of a form of this invention. It is a front view of the friction ring of FIG. It is sectional drawing of the VV arrow of FIG. It is a perspective view which shows an example of the conventional friction ring gear. It is a perspective view which shows the state which mounted | wore the friction main body with the gear main body of FIG. FIG. 8 is a perspective view showing a part of the friction ring gear of FIG. It is a front view of the friction ring gear of FIG. It is a front view which shows the state which the friction ring of FIG. 7 rotated relatively.

Explanation of symbols

2 ring portion 3 hub 4 gear body 5 annular groove 6 friction ring 8 convex portion 9 concave portion 10 friction ring gear

Claims (3)

  A gear body integrally supporting a ring portion having gear teeth on the outer periphery by a hub, and an annular groove formed on the inner periphery of the ring portion of the gear body is fitted in a compressed state and is restored by its restoring force. A friction ring gear comprising a friction ring pressed against an annular groove and capable of suppressing vibration by generating friction between the friction ring and the annular groove against vibration in the axial direction of the gear body. One of the convex part and the concave part to be fitted is provided on the friction ring side and the other is provided on the gear main body side so as to prevent relative rotation of the friction ring with respect to the shaft and allow displacement in the axial direction. And friction ring gear.   2. The friction ring gear according to claim 1, wherein a convex portion projecting radially outward is provided at an appropriate position in a circumferential direction of the friction ring, and a concave portion is provided at a position corresponding to the convex portion on the gear body side. .   The convex part which protrudes to one side of an axial center direction was provided in the appropriate position of the circumferential direction of a friction ring, and the recessed part was provided in the position corresponding to the said convex part by the side of a gear main body. Friction ring gear.

Images