JP4508994B2 - Flexible gear joint and method for manufacturing the same - Google Patents

Description

  The present invention relates to a flexible gear joint and a method for manufacturing the same, and more particularly to a flexible gear joint for connecting a drive motor for a railway vehicle and a reduction gear device and a method for manufacturing the same.

  The electric motor for driving the railway vehicle is disposed on the bogie frame, and the reduction gear device is disposed on the axle. Accordingly, the axis of the output shaft of the electric motor and the input shaft of the gear device are shifted due to the shaking of the vehicle body during traveling. Even in such a displaced state, it is necessary to smoothly transfer power between the two shafts, and therefore the motor and the gear device are connected by a flexible gear joint.

  Also in the prior art, the outline of the configuration contents and the method contents of such a flexible gear joint and its manufacturing method are the same as the configuration contents and method contents of the present invention described in detail in the embodiment except for the main points of the present invention. It is the same (for example, refer patent document 1).

  In FIG. 1 which shows the whole structure of a flexible gear joint, the output rotating shaft 1 of the drive motor and the input rotating shaft 2 of the reduction gear device are arranged. Pinions 3 and 3 are fixed to the output rotating shaft 1 and the input rotating shaft 2, and external gears 3a and 3a composed of teeth subjected to crowning are formed. In addition, sleeves 4 and 4 fixed to each other with a plurality of connecting bolts 5 and nuts 6 are disposed, and the sleeves 4 and 4 have teeth of external gears 3a and 3a provided on the pinions 3 and 3, respectively. Internal gears 4a and 4a having meshing teeth are provided.

  Since this type of flexible gear joint is configured as described above, even if the vehicle body fluctuates during traveling and the axis line between the output rotation shaft 1 of the motor and the input rotation shaft 2 of the gear device is shifted, the pinion Since the teeth of the external gear 3 a provided on the crown 3 are subjected to crowning processing, a smooth driving force can be transmitted from the output rotary shaft 1 to the input rotary shaft 2. Even when both the rotary shafts 1 and 2 move in the axial direction, the teeth of the external gear 3a provided on the pinion 3 freely move along the tooth groove of the internal gear 4a of the sleeve 4. .

In such a flexible gear joint, the internal gear 4a provided on the sleeve 4 is gear cut by the method shown in FIGS. 2 is a cross-sectional view showing the gear cutting state, and FIG. 3 is a plan view of the gear cutting state of FIG. 2 as viewed from above.
In the figure, a bed 12 of a gear cutting device for fixing the sleeve 4 to be geared, a pinion cutter 14 for cutting teeth, and an operating shaft 13 of the gear cutting device to which the pinion cutter 14 is attached are shown.

  Next, the gear cutting motion will be described. As shown in FIG. 2, the pinion cutter 14 attached to the operation shaft 13 of the gear cutting device has an outer end face 4c having a tooth width 4b in the tooth stripe direction of the internal gear 4a of the sleeve, A reciprocating motion is performed with a stroke 14a to which an overstroke length is added from the inner end face 4d to make one virtual gear, and as shown in FIG. 3, the virtual gear of the pinion cutter 14 and the sleeve 4 are correctly meshed, A gear is formed by forcing a relative rotational motion (shown by an arrow in the figure) to scrape off a portion that interferes with the motion of the virtual gear from the internal gear 4a portion of the sleeve 4.

  While performing the above movement, the operating shaft 13 of the gear cutting device to which the pinion cutter 14 is attached moves from the tooth tip 4e of the sleeve toward the tooth bottom 4f, and sequentially advances the machining of the scraping gear.

Japanese Patent Laid-Open No. 2002-21871

Here, in the flexible gear joint according to the prior art, the outer end face 4c of the internal gear 4a connected to the end face of the sleeve 4 is formed in a plane parallel to the horizontal direction shown in FIG. It extends in a direction perpendicular to the reciprocating motion direction indicated by the stroke 14a at the time of cutting, and is not provided with a chamfered shape with an angle A as in the embodiment according to the present invention.
In the processing of the sleeve internal gear according to the prior art, the outer end face 4c of the internal gear 4a connected to the end face of the sleeve 4 where the pinion cutter 14 begins to cut first is configured in a plane parallel to the horizontal direction shown in the drawing. Since the pinion cutter 14 extends in a direction perpendicular to the reciprocating motion direction having the stroke 14a of the pinion cutter 14, when the pinion cutter 14 starts reciprocating motion (stroke 14a), the cutting edge of the pinion cutter 14 collides with this plane. Therefore, when the material hardness of the sleeve is large, the sharpness of the pinion cutter 14 at the beginning of cutting cannot be fully exhibited, and the roughness of the tooth surface is deteriorated. Further, the blade edge life of the pinion cutter 14 is shortened, and there is a problem that the edge is frequently reground.

And, since the inner end face 4d of the sleeve 4 where the cutting process is completed in the reciprocating motion of the pinion cutter 14 is also configured in a plane parallel to the horizontal direction in the figure, the tooth width 4d is scraped off unless the entire length is finished. Since the chips are not separated from the pinion cutter blade edge, it is easy to entrain the chips on the blade edge, and when the pinion cutter reciprocates upward, there is a problem of scratching the tooth surface of the internal gear 4a provided on the processed sleeve 4. .
As a countermeasure, it is necessary to increase the overstroke length of the pinion cutter 14 from the inner end face 4d. As a result, the length of the stroke 14a in the reciprocating motion of the pinion cutter 14 increases, resulting in a disadvantage that the processing time is extended.

  The present invention has been made to solve the above-mentioned problems, and is a flexible gear joint capable of performing accurate and rapid precision machining while ensuring the life of a working tool for forming a gear, and its manufacture. The purpose is to obtain a method.

In the flexible joint according to the present invention, the first rotation shaft, the first external gear provided on the first rotation shaft, and the end surface of the first rotation shaft face each other and the end surface faces the first rotation shaft. A second rotating shaft extending in the same direction as the extending direction of the shaft, a second external gear provided on the second rotating shaft, and a first internal gear corresponding to the first external gear A sleeve member provided with a gear and a second internal gear corresponding to the second external gear, wherein the first and second external gears are axial centers of the first and second internal gears. The first and second external gears are configured to move a predetermined amount in the direction, and the first and second external gears are relative to the shaft centers of the first and second internal gears. The first and second external gears are formed so as to be inclined at a predetermined angle, and the first rotating shaft and the second rotating shaft are In flexible gear coupling for transmitting rotational force between said outer end surface of the first and second internal gear provided on the sleeve member, or to both the outer end face and the inner end face, at an angle from the tooth bottom It is provided with a chamfered shape that forms a plane extending in a slope shape .

In the flexible joint manufacturing method according to the present invention, the first rotating shaft, the first external gear provided on the first rotating shaft, and the end surface of the first rotating shaft face each other and the end surface is opposed to the first rotating shaft. A second rotating shaft extending in the same direction as the extending direction of the first rotating shaft, a second external gear provided on the second rotating shaft, and a first corresponding to the first external gear. A sleeve member provided with a second internal gear corresponding to the internal gear and the second external gear, wherein the first and second external gears are the first and second internal gears. The first and second external gears are configured so as to be able to move by a predetermined amount in the axial direction, and the first and second external gears are axial centers of the first and second internal gears. The first external gear and the second external gear are formed so as to be inclined at a predetermined angle with respect to the first rotation shaft and the second rotation gear. In producing a flexible gear coupling for transmitting rotational force between the rotating shaft, the outer end surface of the provided in the sleeve member first and second internal gear or to both the outer end face and an inner end face, the teeth A chamfering shape is formed to form a flat surface extending at an angle from the bottom, and a processing tool is inserted from the end surface on which the chamfering shape is applied to process the first and second internal gears. A gear is formed.

According to the present invention, the outer end surfaces of the first and second internal gears provided on the sleeve member, or both the outer end surface and the inner end surface are formed with a plane extending at an angle from the tooth bottom and extending in a slope shape. By providing the chamfered shape, it is possible to obtain a flexible gear joint and a method for manufacturing the same that can perform precise and quick precision machining while ensuring the life of the tool for forming the gear.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view showing the overall configuration of the flexible gear joint in the first embodiment. FIG. 2 is a plan view showing a machining state of the sleeve internal gear according to the first embodiment. FIG. 3 is a partial cross-sectional view showing a processed state of the sleeve internal gear according to the first embodiment.

  In FIG. 1 which shows the whole structure of the flexible gear joint in Embodiment 1 by this invention, the output rotating shaft 1 of the drive motor and the input rotating shaft 2 of the reduction gear apparatus are arrange | positioned. Pinions 3 and 3 are fixed to the output rotating shaft 1 and the input rotating shaft 2, and external gears 3a and 3a composed of teeth subjected to crowning are formed. In addition, sleeves 4 and 4 fixed to each other with a plurality of connecting bolts 5 and nuts 6 are disposed, and the sleeves 4 and 4 have teeth meshing with the teeth of the external gears 3a and 3a of the pinions 3 and 3. The internal gears 4a and 4a are provided. A lubricant grease 7 is filled in the periphery of the gears 3a and 4a in the sleeves 4 and 4 where they mesh.

The end cover 8 attached to the sleeve 4 prevents the grease 7 in the sleeve 4 from scattering. The center plate 9 and the shaft end nut 10 that partition the inside of the sleeve 4 prevent the pinion 3 from falling off the rotating shafts 1 and 2. The cushion 11 prevents the shaft end nut 10 from hitting the center plate 9 and scratching it.
The flexible gear joint configured as described above has a symmetrical structure with respect to the center plate 9.

  Since the flexible gear joint according to the first embodiment of the present invention is configured as described above, the vehicle body is shaken during traveling, and the axis line between the output rotary shaft 1 of the motor and the input rotary shaft 2 of the gear device is Even if they deviate, the teeth of the external gear 3a of the pinion 3 are crowned, so that a smooth driving force can be transmitted from the output rotary shaft 1 to the input rotary shaft 2. Even when both the rotary shafts 1 and 2 move in the axial direction, the teeth of the external gear 3a provided on the pinion 3 freely move along the tooth groove of the internal gear 4a of the sleeve 4. .

In such a flexible gear joint, the internal gear 3a provided on the sleeve 4 is gear cut by the method shown in FIGS. 2 is a cross-sectional view showing the gear cutting state, and FIG. 3 is a plan view of the gear cutting state shown in FIG. 2 as viewed from above.
In the figure, a bed 12 of a gear cutting device for fixing the sleeve 4 to be geared, a pinion cutter 14 for cutting teeth, and an operating shaft 13 of the gear cutting device to which the pinion cutter 14 is attached are shown.

  Next, the gear cutting movement will be described. As shown in FIG. 3, the pinion cutter 14 attached to the operating shaft 13 of the gear cutting device has an outer end face 4c having a tooth width 4b in the tooth stripe direction of the internal gear 4a of the sleeve, A reciprocating motion is performed with the stroke 14a with an overstroke length added from the inner end face 4d to form one virtual gear, and as shown in FIG. 2, the virtual gear of the pinion cutter 14 and the sleeve 4 are correctly meshed. A gear is formed by forcing a relative rotational motion (shown by an arrow in the figure) to scrape off a portion that interferes with the motion of the virtual gear from the internal gear 4a portion of the sleeve 4.

  While performing the above-mentioned movement, the operating shaft 13 of the gear cutting device to which the pinion cutter 14 is attached moves from the tooth tip 4e of the sleeve toward the tooth bottom 4f, scrapes off sequentially, and advances the gear processing. .

  The internal gear 4a of the sleeve 4 is formed by reciprocating a stroke 14a by a pinion cutter 14 attached to the operating shaft 13 of the gear cutting device. In the internal gear 4a portion of the sleeve 4, a chamfered shape having an angle A is provided on the outer end surface 4c and the inner end surface 4d of the tooth width 4b from the tooth bottom 4f toward the tooth tip 4e.

  Here, an internal gear 4 a is provided on the inner peripheral surface of each of the sleeves 4 and 4 fixed to each other by a plurality of connecting bolts 5 and nuts 6, and the outer end surface of the internal gear 4 a connected to the end surface of the sleeve 4. 4c and the inner end face 4d of the internal gear 4a having the tooth width 4b are arranged on a plane perpendicular to the reciprocating motion direction having the stroke 14a during gear cutting by the pinion cutter 14, that is, on the inner peripheral surface of the sleeve 4. A chamfered shape that forms an angle A with respect to a plane perpendicular to the axial center direction of the provided internal gear 4a is provided from the tooth bottom 4f toward the tooth tip 4e.

  The chamfered shape forming the angle A may be started not from the position of the tooth bottom 4f as shown here but from a position close to the tooth tip position 4e by a predetermined dimension from the position of the tooth bottom 4f. That is, a predetermined dimension extends from the tooth bottom 4f of the outer end surface 4c of the internal gear 4a connected to the end surface of the sleeve 4 to the inner diameter side of the sleeve 4 along a plane perpendicular to the axial direction of the internal gear 4a. A chamfered shape that forms an angle A with respect to a plane perpendicular to the axial direction of the internal gear 4a from the position may be provided toward the tooth tip 4e.

As described above, the pinion cutter 14 attached to the operating shaft 13 of the gear cutting device performs the reciprocating motion of the stroke 14a to form the internal gear 4a. In the forward movement of the pinion cutter 14, the outer end surface 4 c of the internal gear 4 a of the sleeve 4 has a chamfered shape with a gradient according to the angle A, so that the cutting edge of the pinion cutter 14 bites the outer end surface of the sleeve during gear cutting. It becomes easy.
Similarly, since the inner end face 4d of the internal gear 4a of the sleeve 4 has a chamfered shape having a gradient according to the angle A, chips are quickly separated from the cutting edge of the pinion cutter 14 during processing.

As described above, the chamfering shape forming the angle A provided on the outer end surface 4c and the inner end surface 4d of the internal gear 4a improves the sharpness of the pinion cutter 14 when the pinion cutter 14 performs gear cutting. Extend life.
Further, the chamfered shape having an angle A provided on the outer end surface 4c and the inner end surface 4d of the internal gear 4a speeds up the chip separation from the cutting edge of the pinion cutter 14, and entrains the chip and damages the tooth surface. The trouble to attach disappears.

  According to the first embodiment of the present invention, the first rotation shaft made up of the output rotation shaft 1 of the drive motor and the pinion 3 attached to the first rotation shaft made up of the output rotation shaft 1 of the drive motor. The first external gear 3a provided, and the first rotary shaft consisting of the output rotary shaft 1 of the drive motor with the end face facing the end surface of the first rotary shaft consisting of the output rotary shaft 1 of the drive motor. A second rotation shaft consisting of the input rotation shaft 2 of the reduction gear device extending in the same direction as the extending direction of the gear, and a pinion attached to the second rotation shaft consisting of the input rotation shaft 2 of the reduction gear device 3, a second internal gear 4 a corresponding to the first external gear 3 a, and a second internal gear 4 a corresponding to the second external gear 3 a. 1 fixed with a plurality of connecting bolts 5 and nuts provided with And the first and second external gears 3a can move the first and second external gears 3a by a predetermined amount in the axial direction of the first and second internal gears 4a. The second external gear 3a is configured, and the first and second external gears 3a can be inclined at a predetermined angle with respect to the axial centers of the first and second internal gears 4a. The first and second external gears 3a are formed by crowning, and a second rotary shaft comprising the first rotary shaft 1 of the drive motor and the input rotary shaft 2 of the reduction gear device is formed. A flexible gear joint for transmitting a rotational force to and from the rotating shaft of the outer end face 4c of the first and second internal gears 4a provided on the sleeve member comprising the pair of sleeves 4 and 4, Alternatively, the outer end face 4c and the inner end face 4 Since a chamfered shape with an angle A with respect to a plane perpendicular to the axial center direction of the internal gear 4a provided on the sleeve member consisting of the sleeves 4 and 4 is provided on both of them, an appropriate chamfered shape is provided on the gear end surface. By providing, it is possible to obtain a flexible gear joint that can perform accurate and quick precision machining while ensuring the life of the working tool for forming the gear.

  Further, according to the first embodiment of the present invention, the first rotation shaft composed of the output rotation shaft 1 of the drive motor, and the pinion attached to the first rotation shaft composed of the output rotation shaft 1 of the drive motor. The first external gear 3a provided on the first rotating gear 1 and the end surface of the first rotating shaft made up of the output rotating shaft 1 of the driving motor are opposed to each other, and the first rotating gear 1 of the driving motor is made up of the first rotating gear 1 A second rotating shaft comprising the input rotating shaft 2 of the reduction gear device extending in the same direction as the extending direction of the rotating shaft, and a second rotating shaft comprising the input rotating shaft 2 of the reduction gear device. A second external gear 3a provided on the pinion 3, a first internal gear 4a corresponding to the first external gear 3a, and a second internal gear corresponding to the second external gear 3a. Secured by a plurality of connecting bolts 5 and nuts provided with a gear 4a. A sleeve member comprising a pair of sleeves 4 and 4, and the first and second external gears 3 a can move a predetermined amount in the axial direction of the first and second internal gears 4 a. While constituting the 1st and 2nd external gear 3a, the 1st and 2nd external gear 3a inclines at a predetermined angle with respect to the axial center of the 1st and 2nd internal gear 4a. The first and second external gears 3a are formed by crowning so that the first rotating shaft 1 is composed of the output rotating shaft 1 of the driving motor and the input rotating shaft of the reduction gear device. The first and second internal teeth provided on the sleeve member composed of the pair of sleeves 4 and 4 in manufacturing a flexible gear joint that transmits a rotational force between the second rotational shaft and the second rotational shaft. Outer end face 4c of gear 4a or outer end face Both c and the inner end face 4d are chamfered with an angle A with respect to a plane perpendicular to the axial direction of the internal gear 4a provided on the sleeve member comprising the sleeves 4 and 4, and the chamfered shape is applied. Since the first and second internal gears are machined by inserting a processing tool from the end face thus formed to form a gear, an appropriate chamfering shape is applied to the gear end face, thereby forming a gear. It is possible to obtain a method for manufacturing a flexible gear joint that can perform accurate and rapid precision machining while ensuring the life of the machining tool.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a partial cross-sectional view showing a processed state of the sleeve internal gear according to the second embodiment.
In the second embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and exhibits the same operation. In the drawings, the same reference numerals indicate the same or corresponding parts.

  In FIG. 4 showing the machining state of the sleeve internal gear in the second embodiment, in this configuration, in the internal gear 4a portion of the sleeve 4, the angle A from the root 4f to the outer end surface 4c and the inner end surface 4d of the tooth width 4b. The chamfered shape is provided so as to be parallel to the illustrated horizontal direction from the middle of the tooth toward the tooth tip 4e.

  Here, an internal gear 4 a is provided on the inner peripheral surface of each of the sleeves 4 and 4 fixed to each other by a plurality of connecting bolts 5 and nuts 6, and the outer end surface of the internal gear 4 a connected to the end surface of the sleeve 4. 4c and the inner end face 4d of the internal gear 4a having the tooth width 4b are arranged on a plane perpendicular to the reciprocating motion direction having the stroke 14a during gear cutting by the pinion cutter 14, that is, on the inner peripheral surface of the sleeve 4. A chamfered shape that forms an angle A with respect to a plane perpendicular to the axial direction of the provided internal gear 4a is provided from the root 4f toward the tooth tip 4e, and from the middle of the tooth toward the tooth tip 4e, The plane parallel to the illustrated horizontal direction, that is, a plane perpendicular to the axial direction of the internal gear 4 a provided on the inner peripheral surface of the sleeve 4 is used.

  The chamfered shape forming the angle A may be started not from the position of the tooth bottom 4f as shown here but from a position close to the tooth tip position 4e by a predetermined dimension from the position of the tooth bottom 4f. The outer end face 4c of the internal gear 4a connected to the end face of the sleeve 4 extends from the tooth bottom 4f along the plane perpendicular to the axial direction of the internal gear 4a to the inner diameter side of the sleeve 4 by a predetermined dimension. A chamfered shape that forms an angle A with respect to a plane perpendicular to the axial center direction of the internal gear 4a is provided toward the tooth tip 4e, and parallel to the horizontal direction in the drawing from the middle of the tooth toward the tooth tip 4e. The flat surface, that is, the flat surface perpendicular to the axial direction of the internal gear 4 a provided on the inner peripheral surface of the sleeve 4 may be used.

As described above, the pinion cutter 14 attached to the operating shaft 13 of the gear cutting device performs the reciprocating motion of the stroke 14a to form the internal gear 4a. In the forward movement of the pinion cutter 14, the outer end surface 4 c of the internal gear 4 a of the sleeve 4 has a chamfered shape with a gradient according to the angle A, so that the cutting edge of the pinion cutter 14 bites the outer end surface of the sleeve during gear cutting. It becomes easy.
Similarly, since the inner end face 4d of the internal gear 4a of the sleeve 4 has a chamfered shape having a gradient due to an angle, a corner R, etc., chip separation from the cutting edge of the pinion cutter 14 during processing is quick.

As described above, the chamfering shape forming the angle A provided on the outer end surface 4c and the inner end surface 4d of the internal gear 4a improves the sharpness of the pinion cutter 14 when the pinion cutter 14 performs gear cutting. Extend life.
Further, the chamfered shape having an angle A provided on the outer end surface 4c and the inner end surface 4d of the internal gear 4a speeds up the chip separation from the cutting edge of the pinion cutter 14, and entrains the chip and damages the tooth surface. The trouble to attach disappears.

  According to the second embodiment of the present invention, in the configuration of the first embodiment, the outer end surface 4c or the outer end surface 4d of the internal gear 4a provided on the sleeve member including the pair of sleeves 4 and 4 The chamfered shape of both the inner end surface 4c and the angle A with respect to a plane perpendicular to the axial direction of the internal gear 4a provided on the sleeve member formed of the sleeves 4 and 4 on the tooth bottom 4f side of the internal gear 4a. In addition, since the tooth tip 4e side is a plane perpendicular to the axial center direction of the internal gear 4a, the appropriate chamfered shape provided on the gear end surface ensures the life of the processing tool for gear formation, A flexible gear joint capable of performing accurate and rapid precision machining can be obtained.

  According to the second embodiment of the present invention, the outer end surface 4c or the outer end surface of the internal gear 4a provided on the sleeve member composed of the pair of sleeves 4 and 4 in the method of the first embodiment. The chamfered shapes of both 4d and the inner end face 4c are angled with respect to a plane perpendicular to the axial direction of the internal gear 4a provided on the sleeve member comprising the sleeves 4 and 4 on the tooth bottom 4f side of the internal gear 4a. A is added, the tooth tip 4e side is a plane perpendicular to the axial center direction of the internal gear 4a, and the first and second internal gears are inserted by inserting a processing tool from the end face having the chamfered shape. Since the gear is formed by processing 4a, it is possible to perform accurate and quick precision machining while ensuring the life of the processing tool for gear formation by the appropriate chamfered shape formed on the gear end face. Gear joint manufacturing method It is possible to obtain.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a partial cross-sectional view showing a processed state of the sleeve internal gear according to the third embodiment.
In the third embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and has the same function. In the drawings, the same reference numerals indicate the same or corresponding parts.

  In FIG. 5 which shows the processing state of the sleeve internal gear according to the third embodiment, in this configuration, in the internal gear 4a portion of the sleeve 4, the radius of curvature extends from the root 4f to the outer end surface 4c and inner end surface 4d of the tooth width 4b. A corner R as an arcuate corner made of B is provided, and is formed in a plane parallel to the horizontal direction in the figure from the middle of the tooth toward the tooth tip 4e.

  Here, an internal gear 4 a is provided on the inner peripheral surface of each of the sleeves 4 and 4 fixed to each other by a plurality of connecting bolts 5 and nuts 6, and the outer end surface of the internal gear 4 a connected to the end surface of the sleeve 4. 4c and an inner end face 4d of the internal gear 4a having a tooth width 4b are provided with a corner R as an arc corner having a radius of curvature B from the root 4f and from the middle of the tooth toward the tooth tip 4e. Thus, the plane is parallel to the illustrated horizontal direction, that is, a plane perpendicular to the axial direction of the internal gear 4 a provided on the inner peripheral surface of the sleeve 4.

  It should be noted that the chamfered shape that forms the corner R as the arcuate corner does not start from the position of the tooth bottom 4f as shown here, but starts from a position close to the tooth tip position 4e by a predetermined dimension from the position of the tooth bottom 4f. It may be. That is, a predetermined dimension extends from the tooth bottom 4f of the outer end surface 4c of the internal gear 4a connected to the end surface of the sleeve 4 to the inner diameter side of the sleeve 4 along a plane perpendicular to the axial direction of the internal gear 4a. A corner R as an arcuate corner having a radius of curvature B is provided from that position, and a plane parallel to the illustrated horizontal direction from the middle of the tooth toward the tooth tip 4e, that is, the inner peripheral surface of the sleeve 4 is provided. There may be a plane perpendicular to the axial direction of the provided internal gear 4a.

As described above, the pinion cutter 14 attached to the operating shaft 13 of the gear cutting device performs the reciprocating motion of the stroke 14a to form the internal gear 4a. In the forward movement of the pinion cutter 14, the outer end surface 4 c of the internal gear 4 a of the sleeve 4 is chamfered with a corner R as an arc corner having a radius of curvature B. The cutting edge easily bites into the outer end surface of the sleeve.
Similarly, since the inner end face 4d of the internal gear 4a of the sleeve 4 has a chamfered shape having a gradient due to an angle, a corner R, etc., chip separation from the cutting edge of the pinion cutter 14 during processing is quick.

Thus, the pinion cutter 14 has a chamfered shape having a corner R as an arcuate corner formed by the radius of curvature B provided on the outer end surface 4c and the inner end surface 4d of the internal gear 4a. The sharpness of 14 is improved and the life of the pinion cutter 14 is extended.
Further, the chamfered shape having the corner R as the arcuate corner formed by the radius of curvature B provided on the outer end surface 4c and the inner end surface 4d of the internal gear 4a accelerates the removal of chips from the cutting edge of the pinion cutter 14. This eliminates the problem of cutting chips and scratching the tooth surface.

  According to the third embodiment of the present invention, in the configuration of the first embodiment, the outer end surface 4c of the internal gear 4a provided on the sleeve member composed of the pair of sleeves 4 and 4, or the outer end surface 4c Both chamfered shapes with the inner end face 4d are provided with arcuate corners composed of corners R on the tooth bottom 4f side of the internal gear, and the tooth tip 4e side is perpendicular to the axial direction of the internal gear 4a. Since it is a flat surface, it is possible to obtain a flexible gear joint that can perform accurate and rapid precision machining while ensuring the life of the working tool for forming the gear with an appropriate chamfered shape provided on the gear end face.

  Further, according to the third embodiment of the present invention, in the method content in the first embodiment, the first and second internal gears 4a provided on the sleeve member composed of the pair of sleeves 4 and 4 are provided. The chamfered shape of the outer end face 4c or both the outer end face 4c and the inner end face 4d is provided with an arc corner having a corner R on the tooth bottom 4f side of the internal gear. Since it is a plane perpendicular to the axial direction of the gear, a processing tool is inserted from the end face on which the chamfered shape is applied, and the first and second internal gears 4a are processed to form a gear. With an appropriate chamfered shape applied to the end face of the gear, it is possible to obtain a method for manufacturing a flexible gear joint capable of performing accurate and rapid precision machining while ensuring the life of the processing tool for forming the gear.

Embodiment 4 FIG.
A fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a partial cross-sectional view showing a machining state of the sleeve internal gear according to the fourth embodiment.
In the fourth embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and exhibits the same operation. In the drawings, the same reference numerals indicate the same or corresponding parts.

  In FIG. 6 which shows the processing state of the sleeve internal gear in the third embodiment, in this configuration, in the internal gear 4a portion of the sleeve 4, the angle C from the root 4f to the outer end surface 4c and the inner end surface 4d of the tooth width 4b. A chamfered shape having an angle D is provided from the middle of the tooth toward the tooth tip 4e.

  Here, an internal gear 4 a is provided on the inner peripheral surface of each of the sleeves 4 and 4 fixed to each other by a plurality of connecting bolts 5 and nuts 6, and the outer end surface of the internal gear 4 a connected to the end surface of the sleeve 4. 4c and the inner end face 4d of the internal gear 4a having the tooth width 4b are arranged on a plane perpendicular to the reciprocating motion direction having the stroke 14a during gear cutting by the pinion cutter 14, that is, on the inner peripheral surface of the sleeve 4. A chamfered shape with an angle C is provided from the root 4f to the plane perpendicular to the axial direction of the provided internal gear 4a, and the tooth pinion cutter 14 is used for gear cutting from the middle of the tooth toward the tooth tip 4e. A chamfered shape having an angle D with respect to a plane perpendicular to the reciprocating direction having the stroke 14 a, that is, a plane perpendicular to the axial direction of the internal gear 4 a provided on the inner peripheral surface of the sleeve 4. It is provided.

  The chamfered shape forming the angle C may be started not from the position of the tooth bottom 4f as shown here but from a position close to the tooth tip position 4e by a predetermined dimension from the position of the tooth bottom 4f. The outer end face 4c of the internal gear 4a connected to the end face of the sleeve 4 extends from the tooth bottom 4f along the plane perpendicular to the axial direction of the internal gear 4a to the inner diameter side of the sleeve 4 by a predetermined dimension. An angle C with respect to a plane perpendicular to the reciprocating motion direction having the stroke 14a at the time of gear cutting by the pinion cutter 14, that is, a plane perpendicular to the axial direction of the internal gear 4a provided on the inner peripheral surface of the sleeve 4. A chamfered shape is provided, and from the middle of the tooth toward the tooth tip 4e, it is provided on a plane perpendicular to the reciprocating direction having the stroke 14a at the time of gear cutting by the pinion cutter 14, that is, on the inner peripheral surface of the sleeve 4. A chamfered shape having an angle D with respect to a plane perpendicular to the axial direction of the internal gear 4a may be provided.

As described above, the pinion cutter 14 attached to the operating shaft 13 of the gear cutting device performs the reciprocating motion of the stroke 14a to form the internal gear 4a. In the forward movement of the pinion cutter 14, the outer end surface 4 c of the internal gear 4 a of the sleeve 4 has a chamfered shape with a gradient according to the angles C and D. Therefore, during gear cutting, the cutting edge of the pinion cutter 14 is the outer end surface of the sleeve. It becomes easy to bite.
Similarly, since the inner end face 4d of the internal gear 4a of the sleeve 4 has a chamfered shape with a gradient according to the angles C and D, chip separation from the cutting edge of the pinion cutter 14 at the time of machining is quick.

As described above, the chamfered shape having the angles C and D provided on the outer end surface 4c and the inner end surface 4d of the internal gear 4a improves the sharpness of the pinion cutter 14 when the pinion cutter 14 performs gear cutting. Extend the life of 14.
In addition, the chamfered shape forming the angles C and D provided on the outer end surface 4c and the inner end surface 4d of the internal gear 4a speeds up the chip separation from the cutting edge of the pinion cutter 14, and entrains the chip into the tooth surface. There is no problem of scratching.

  According to the fourth embodiment of the present invention, in the configuration of the first embodiment, the outer end surface 4c of the internal gear 4a provided on the sleeve member composed of the pair of sleeves 4, 4 or the outer end surface 4c; The chamfered shape of both the inner end face 4d and the bottom of the internal gear 4a with respect to an angle with respect to a plane perpendicular to the axial direction of the internal gear 4a provided on the sleeve member comprising the pair of sleeves 4 and 4 Since different angles C and D are given to the 4f side and the tooth tip 4e side, the appropriate chamfering shape provided on the gear end face ensures accurate and rapid precision machining while ensuring the life of the tool for forming the gear. A flexible gear joint that can be performed can be obtained.

  Further, according to the fourth embodiment of the present invention, in the method content in the first embodiment, the outer end surfaces of the first and second internal gears provided on the sleeve member, or both the outer end surface and the inner end surface. The angle between the chamfered shape of the internal gear 4a provided on the sleeve member composed of the sleeves 4 and 4 and the plane perpendicular to the axial direction of the internal gear 4a is different between the tooth bottom 4f side and the tooth tip 4e side of the internal gear 4a. Since C and D are attached, a processing tool is inserted from the end face having the chamfered shape, and the first and second internal gears 4a are processed to form a gear. With a suitable chamfered shape, a method for manufacturing a flexible gear joint capable of performing accurate and rapid precision machining while ensuring the life of a tool for forming a gear can be obtained.

  In the embodiment according to the present invention, the configurations shown in the following items (A1) to (A4) are proposed.

(A1) A pair of internal gears 4a provided on the same axis of the sleeve 4 and an external gear 3a provided on a pair of pinions 3 mesh with each other, and the external gear 3a Crowning the external gear 3a so that a predetermined amount of movement is possible in the axial direction of the gear 4a and tilting at a predetermined angle with respect to the axial direction of the internal gear 4a, A lubricant is filled around the meshing portion of the internal gear 4 a and the external gear 3 a, and the second rotary shaft 1 fixed to the other pinion 3 is fixed from the first rotary shaft 1 fixed to the one pinion 3. In the flexible gear joint that transmits the rotational force to the rotary shaft 2, the outer end face 4c of the internal gear 4a of the sleeve 4 or both the outer end face 4c and the inner end face 4d are provided with angled chamfered shapes. A flexible gear joint featuring the characteristics.

(A2) The chamfered shape of the outer end face 4c of the sleeve internal gear 4a or both the outer end face 4c and the inner end face 4d is angled to the tooth bottom 4f side of the internal gear 4a, and the tooth tip 4e side is flat. The flexible gear joint according to item (A1), characterized in that:

(A3) The outer end face 4c of the sleeve internal gear 4a or the chamfered shape of both the outer end face 4c and the inner end face 4d is provided with a corner R on the tooth bottom 4f side of the internal gear 4a, and the tooth tip 4e side is flat. The flexible gear joint according to item (A1), wherein the flexible gear joint is provided.

(A4) The outer end face 4c of the sleeve internal gear 4a or the chamfered shapes of both the outer end face 4c and the inner end face 4d are provided with different angles on the tooth bottom 4f side and the tooth tip 4e side of the internal gear 4a. The flexible gear joint as set forth in (A1).

In the embodiment according to the present invention, the outer end surface 4c of the internal gear 4a of the sleeve 4 is provided with an angled gradient, so that the sharpness of the gear cutting by the pinion cutter is improved and the roughness of the tooth surface is improved. The cut edge is also reduced.
Further, in the embodiment according to the present invention, it has been gained experience that the blade edge life of the pinion cutter 14 is extended by about 30% as compared with the conventional structure, and therefore the period of re-grinding of the blade edge can be extended. There is an effect such as reducing management costs.

When the inner end face 4c of the internal gear 4a of the sleeve 4 is provided with a slope having an angle, the separation of chips from the tip of the pinion cutter 14 is accelerated, so that the stroke length of the pinion cutter 14 can be reduced.
In addition, there is an effect of eliminating the processing problem of damaging the tooth surface by entraining chips on the cutting edge in the backward movement of the pinion cutter 14.

As described above, according to the embodiment of the present invention, the sharpness of the pinion cutter 14 at the time of gear cutting is achieved by providing an angled chamfered shape on the outer end surface 4c of the internal gear 4a provided on the sleeve 4. This improves the life of the pinion cutter 14 blade edge.
Further, by providing a chamfered shape with an angle on the inner end face 4c of the internal gear 4a provided on the sleeve 4, the chip separation from the blade edge of the pinion cutter 14 is accelerated, and the chips are wound around the blade edge. The problem of scratching the tooth surface of the internal gear 4a provided on the sleeve 4 is eliminated.

  In addition, although the internal gear of the flexible gear joint for railway vehicles was demonstrated as an example here, even if it implements with the other similar internal gear and external gear processed with the pinion cutter 14, the same effect is obtained. is there.

It is a longitudinal cross-sectional view which shows the whole structure of the flexible gear joint in Embodiment 1 by this invention. It is a fragmentary sectional view showing a sleeve internal gear processing state in Embodiment 1 by this invention. It is a top view which shows the sleeve internal gear processed state in Embodiment 1 by this invention. It is a fragmentary sectional view showing a sleeve internal gear processing state in Embodiment 2 by this invention. The fragmentary sectional view which shows the sleeve internal gear processing state in Embodiment 3 by this invention. The fragmentary sectional view which shows the sleeve internal gear processing state in Embodiment 4 by this invention.

Explanation of symbols

1 output rotation shaft, 2 input rotation shaft, 3 pinion, 3a external gear, 4 sleeve, 4a internal gear, 4c external end surface of internal gear, 4d internal end surface of internal gear, 4e tooth tip, 4f tooth bottom, 7 Lubricant (grease).

Claims (8)

The first rotating shaft, the first external gear provided on the first rotating shaft, and the end surface of the first rotating shaft face each other in the same direction as the extending direction of the first rotating shaft. A second rotating shaft extending, a second external gear provided on the second rotating shaft, a first internal gear corresponding to the first external gear, and the second external gear And a sleeve member provided with corresponding second internal gears, and the first and second external gears can move a predetermined amount in the axial direction of the first and second internal gears. The first and second external gears are configured, and the first and second external gears can be inclined at a predetermined angle with respect to the axis of the first and second internal gears. Forming the first and second external gears, and transmitting a rotational force between the first rotating shaft and the second rotating shaft. In the joint, the outer end surface of the first and second internal gear provided on the sleeve member, or to both the outer end face and an inner end surface to form a plane extending in inclined plane at an angle from the tooth bottom A flexible gear joint provided with a chamfered shape.   The outer end surface of the internal gear provided on the sleeve member or the chamfered shape of both the outer end surface and the inner end surface is angled to the tooth bottom side of the internal gear, and the tooth tip side is the axis of the internal gear. The flexible gear joint according to claim 1, wherein the flexible gear joint is a plane perpendicular to the vertical axis.   The outer end face of the internal gear provided in the sleeve member or the chamfered shape of both the outer end face and the inner end face is provided with different angles on the tooth bottom side and the tooth tip side of the internal gear. The flexible gear joint according to 1. The flexible gear joint according to any one of claims 1 to 3, wherein a chamfered shape having a predetermined angle is provided between the flat surface and the tooth bottom extending in a slope shape. The chamfered shape which consists of the arc-shaped corner part with a predetermined curvature radius was provided between the said flat surface extended in the shape of a slope, and a tooth root, The Claim 1 characterized by the above-mentioned. Flexible gear joint. The first rotating shaft, the first external gear provided on the first rotating shaft, and the end surface of the first rotating shaft face each other in the same direction as the extending direction of the first rotating shaft. A second rotating shaft extending, a second external gear provided on the second rotating shaft, a first internal gear corresponding to the first external gear, and the second external gear And a sleeve member provided with corresponding second internal gears, and the first and second external gears can move a predetermined amount in the axial direction of the first and second internal gears. The first and second external gears are configured, and the first and second external gears can be inclined at a predetermined angle with respect to the axis of the first and second internal gears. Forming the first and second external gears, and transmitting a rotational force between the first rotating shaft and the second rotating shaft. In producing the joint, the outer end surface of the first and second internal gear provided on the sleeve member, or to both the outer end face and an inner end surface, a plane extending in inclined plane at an angle from the tooth bottom A flexible gear joint characterized by forming a chamfered shape and forming a gear by inserting a processing tool from an end surface to which the chamfered shape is applied to process the first and second internal gears. Production method. The outer end surfaces of the first and second internal gears provided on the sleeve member, or the chamfered shape of both the outer end surface and the inner end surface are angled to the tooth bottom side of the internal gear, and the tooth tip side is It is a plane perpendicular to the axis of the internal gear, and a processing tool is inserted from the end face having the chamfered shape to process the first and second internal gears to form a gear. The manufacturing method of the flexible gear joint of Claim 6 . The outer end surfaces of the first and second internal gears provided on the sleeve member, or the chamfered shapes of both the outer end surface and the inner end surface are provided with different angles on the tooth bottom side and the tooth tip side of the internal gear. The flexible gear according to claim 6 , wherein a gear is formed by processing the first and second internal gears by inserting a processing tool from an end face having the chamfered shape. A method for manufacturing a joint.

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