WO2005080829A1 - 歯車及びその切削加工方法 - Google Patents
歯車及びその切削加工方法 Download PDFInfo
- Publication number
- WO2005080829A1 WO2005080829A1 PCT/JP2005/002396 JP2005002396W WO2005080829A1 WO 2005080829 A1 WO2005080829 A1 WO 2005080829A1 JP 2005002396 W JP2005002396 W JP 2005002396W WO 2005080829 A1 WO2005080829 A1 WO 2005080829A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tooth surface
- tooth
- axial direction
- gear
- respect
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F9/00—Making gears having teeth curved in their longitudinal direction
- B23F9/08—Making gears having teeth curved in their longitudinal direction by milling, e.g. with helicoidal hob
- B23F9/10—Making gears having teeth curved in their longitudinal direction by milling, e.g. with helicoidal hob with a face-mill
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
- F16H55/0886—Profiling with corrections along the width, e.g. flank width crowning for better load distribution
Definitions
- the present invention relates to a gear used for, for example, a device for transmitting the power of an automobile, and a cutting method therefor.
- a gear In a device or the like for transmitting the power of an automobile, a gear is generally used to transmit a driving force between two axes.
- a typical example of such a gear is a spur gear whose tooth trace is a straight line parallel to the axis.
- a helical gear having oblique tooth traces is known.
- a bevel gear having a bent linear tooth trace is known.
- the spur gear is a straight line whose tooth trace is parallel to the axis, the driving force to be transmitted is applied in the entire axial direction of the meshing teeth. For this reason, the spur gear can transmit a high driving force.
- spur gears generate noise when the teeth engage (contact) because only a few teeth engage simultaneously.
- the helical gear Since the helical gear has an inclined tooth trace, the number of meshing teeth simultaneously increases (the meshing ratio increases). For this reason, noise at the time of tooth engagement (at the time of contact) is suppressed.
- the driving force is dispersed in the direction along the oblique tooth trace (in the thrust direction). That is, the transmission loss of the driving force is large.
- the gear may move in the thrust direction due to the load in the thrust direction to shift the meshing position. In this case, the original tooth strength cannot be obtained, and the durability of the gear is also poor.
- a helical gear In order to solve the above-mentioned problems of the spur gear and the helical gear, a helical gear is used.
- the bevel gears are always in contact at two or more places due to the bent linear tooth traces. For this reason, noise can be suppressed. Further, the load in the thrust direction at the time of driving force transmission is offset by the two tooth traces (helical) inclined in opposite directions, so that the meshing position does not shift. That is, the durability of the gear is also excellent.
- the bevel gear since the top (convex tooth surface) and the valley bottom (concave tooth surface) of the bent linear tooth trace contact (engage), stress is concentrated, and especially at the valley bottom. Cracks occur.
- the helical gear is generally formed by combining two helical gears by a method such as bonding or welding, the number of processing steps is large and the processing cost is high.
- the present invention includes a cylindrical or columnar main body, and a plurality of convex tooth surfaces and concave tooth surfaces provided alternately on the outer periphery of the main body, wherein the convex tooth surface is formed of the convex tooth surface.
- the tooth trace is formed so as to be curved with respect to the axial direction of the main body, and the inclination of the tangent at one end of the tooth trace of the convex tooth surface and the inclination of the tangent at the other end are in the axial direction of the main body.
- the gear has a positive and negative relationship, and the tooth trace on the concave tooth surface is formed similarly to the tooth trace on the convex tooth surface.
- the present invention includes a cylindrical main body, and a plurality of convex tooth surfaces and concave tooth surfaces provided alternately on the inner periphery of the main body, wherein the convex tooth surface is the convex tooth surface.
- the convex tooth surface is the convex tooth surface.
- the gear has a positive and negative relationship, and the tooth trace on the concave tooth surface is formed similarly to the tooth trace on the convex tooth surface.
- the present invention two or more places always come into contact with and engage with each other by the curved tooth muscle. Therefore, noise due to tooth contact can be suppressed.
- the inclination of the tangent at one end of the tooth trace and the inclination of the tangent at the other end are positive and negative with respect to the axial direction of the main body. ⁇
- the engagement position does not shift. That is, the durability of the gear is also excellent. Further, since stress applied to the tooth surface is not concentrated, cracks can be suppressed.
- the convex tooth surface is formed such that tooth traces of the convex tooth surface do not have an inflection point in the axial direction of the main body.
- stress concentration on the tooth surface can be effectively avoided.
- the tooth trace of the convex tooth surface may be formed in an arc shape with respect to the axial direction of the main body.
- one end and the other end of the tooth trace on the convex tooth surface are opposite to each other in the axial direction of the main body. And are in positions that match each other. In this case, the risk of displacement of the meshing position due to the load in the thrust direction can be further reduced.
- the present invention is a method of cutting a gear having any of the above-mentioned features, wherein the rotation axis of the rotary tool is orthogonal to the axis of the cylindrical or columnar material.
- a method comprising:
- the present invention is a method for cutting a gear having any of the above-mentioned features, wherein the rotation axis of the rotary tool is orthogonal to the axis of the cylindrical or columnar material. And an arrangement step of positioning the material and the head so that the rotation axis of the rotary tool is displaced in the axial direction of the material with respect to the center in the axial direction, and cutting the material by driving the rotary tool.
- the convex tooth surface and the concave tooth surface can be formed easily and efficiently.
- a rotational angular velocity of the material with respect to an axis is controlled.
- a rotational angular velocity of the rotary tool is controlled.
- FIG. 1 is a front view showing a gear according to an embodiment of the present invention.
- FIG. 2 is a front view showing a meshing state of the gears of FIG. 1.
- FIG. 3 is a schematic configuration diagram of a cutting device for cutting a gear according to an embodiment of the present invention.
- FIG. 4 is a schematic view showing a state where a cutter cuts a material in the apparatus of FIG. 3.
- FIG. 5 is a schematic view showing a state before cutting by the apparatus of FIG. 3.
- FIG. 6 is a schematic side view showing a state before cutting by the apparatus of FIG. 3.
- FIG. 7 is a schematic view showing a state after cutting by the apparatus of FIG. 3.
- FIG. 8A is an explanatory diagram showing a locus of rotation of a cutter by the apparatus of FIG. 3.
- FIG. 8B is an explanatory view showing a tooth surface formed by the cutter of the device in FIG. 3.
- FIG. 9 is a front view showing a gear according to another embodiment of the present invention.
- FIG. 10 is a front view showing a gear according to still another embodiment of the present invention.
- FIG. 1 is a front view showing a gear according to an embodiment of the present invention.
- FIG. 2 is a front view showing a state of engagement of the gears in FIG.
- the gear W1 has a cylindrical main body 9 and a plurality of teeth 2 provided on the outer periphery of the main body 9.
- the plurality of teeth 2 are a plurality of convex tooth surfaces 3 and concave tooth surfaces 4 provided alternately.
- the convex tooth surface 3 is formed in an arc shape in this case so that the tooth trace of the convex tooth surface 3 is curved with respect to the axial direction of the main body 9.
- the inclination of the tangent at one end 5 of the tooth trace on the convex tooth surface 3 and the inclination of the tangent at the other end 6 have a positive and negative relationship with respect to the axial direction of the main body 9. Further, one end 5 and the other end 6 of the tooth trace on the convex tooth surface 3 are located at positions coincident with each other in the axial direction of the main body 9 (in a side view of the gear W1).
- the tooth trace on the concave tooth surface 4 is formed similarly to the tooth trace on the convex tooth surface 3. That is, the concave tooth surface 4 is formed in an arc shape in this case so that the tooth trace of the concave tooth surface 4 is curved with respect to the axial direction of the main body 9.
- the inclination of the tangent at one end 7 of the tooth trace of the concave tooth surface 4 and the inclination of the tangent at the other end 8 and the axial direction of the force main body 9 have a positive and negative relationship.
- One end 7 and the other end 8 of the tooth trace on the concave tooth surface 4 are located at positions that match each other with respect to the axial direction of the main body 9 (in a side view of the gear W1).
- the transmitted driving force is one end side and the other end side with respect to the axial center (maximum curved portion) of the convex tooth surfaces 3a, 3b and the concave tooth surfaces 4a, 4b, respectively, in the thrust direction.
- the thrust load generated at one end of the central part in the axial direction (maximum bending part) and the thrust load generated at the other end of the central part in the axial direction (maximum bending part) Are in opposite directions and cancel each other.
- FIG. 3 is a schematic configuration diagram of a cutting device for cutting a gear according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram showing a state where a cutter cuts a material in the apparatus of FIG.
- FIG. 5 is a schematic diagram showing a state before cutting by the apparatus of FIG.
- FIG. 6 is a schematic side view showing a state before cutting by the apparatus of FIG.
- FIG. 7 is a schematic diagram showing a state after cutting by the apparatus of FIG.
- FIG. 8A is an explanatory diagram showing a locus of rotation of a cutter by the apparatus of FIG.
- FIG. 8B is an explanatory view showing a tooth surface formed by the cutter of the apparatus in FIG.
- FIG. 3 shows an outline of the cutting apparatus 11.
- the cutting apparatus 11 includes a base 20, a jig assembly 41 and a cutter assembly 21 attached to the base 20.
- the jig assembly 41 includes a mounting jig 43, a table 42 for holding the mounting jig 43, a first control unit 51 for rotating the material WO and the mounting jig 43 about an axis Ol, have.
- the mounting jig 43 also acts as a first jig 43a that abuts one end side of the material WO and a second jig 43b that abuts the other end side of the material W0.
- Cutter assembly 21 A head 25 provided with a cutter 23 at the tip and mounted on a spindle 25 via a connecting shaft 24; a second control unit 31 for rotating the spindle 25 and the head 22 about an axis 02; A third control unit 32 for moving the head 22 along the WO.
- the mounting jig 43 and the head 22 are arranged in a positional relationship in which the axis O 1 of the material WO supported by the mounting jig 43 and the axis 02 of the head 22 are orthogonal.
- Each of the first control unit 51, the second control unit 31, and the third control unit 32 has an encoder that detects a rotational position and a motor that provides a rotational force.
- Each of the control units 31, 32, 51 controls the rotation of the built-in motor based on a control signal output from the control panel 61.
- the input device 71 is a device for inputting processing data and the like to be transferred to the control panel 61.
- the cutter assembly 21 is moved to a predetermined position shown in FIG. Thereafter, the second control unit 31 is operated, and the head 22 having the cutter 23 is rotated at the rotational angular speed ⁇ 1. At this time, as shown in FIG. 4, the rotational axis 02 of the head 22 is positioned so as to be offset (displaced) by a distance ⁇ in the axial direction with respect to the axial center of the material WO.
- the first control unit 51 is operated, and the material WO is rotated at the rotational angular velocity ⁇ 2 integrally with the mounting jig 43.
- the third control unit 32 is operated, and the head 22 is sequentially moved in the horizontal direction as shown in FIG.
- the rotation of the head 22, the rotation of the material WO, and the horizontal movement of the head 22 are all performed synchronously. While the cutter 23 rotates, the material WO rotates by one tooth. For example, in the case of a gear W1 with 33 teeth, when the cutter rotates 33 times, the material WO rotates once.
- the locus of the cutter 23 due to the rotation of the head 22 will be described with reference to FIGS. 8A and 8B. Will be described.
- the rotation axis 02 of the head 22 is set in the axial direction of the material WO with respect to the center of the material WO in the axial direction. Offset by T. Therefore, as shown in FIG. 8A, the trajectory KO of the cutter 23 is different from the position corresponding to the one end 7 and the other end 8 in the axial direction of the material WO (in a side view).
- the cutting surface K1 is, as shown in FIG. 8B, at one end 7 and the other end 8 with respect to the axial direction of the material WO (in a side view! /, T) at the same position.
- the head 22 is sequentially moved in the horizontal direction S in synchronization with the rotation of the material WO and the cutter 23 as described above.
- the cutter 23 sequentially cuts the material WO along the involute shape corresponding to the predetermined tooth 2.
- the convex tooth surface is formed while rotating the material WO.
- the main body 9 and the teeth 2 may extend only on one side of the main body 9 in the axial direction.
- the present invention is also applicable to the gear W1 ′ having the teeth 2 ′ on the inner circumference.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-046148 | 2004-02-23 | ||
JP2004046148A JP2007192237A (ja) | 2004-02-23 | 2004-02-23 | 歯車及びその切削加工方法 |
Publications (1)
Publication Number | Publication Date |
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WO2005080829A1 true WO2005080829A1 (ja) | 2005-09-01 |
Family
ID=34879431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/002396 WO2005080829A1 (ja) | 2004-02-23 | 2005-02-17 | 歯車及びその切削加工方法 |
Country Status (2)
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JP (1) | JP2007192237A (ja) |
WO (1) | WO2005080829A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010121929A1 (de) * | 2009-04-21 | 2010-10-28 | Zf Lenksysteme Gmbh | Zahnstangenlenkung |
CN101890540A (zh) * | 2010-07-16 | 2010-11-24 | 扬州大学 | 一种弧齿圆柱齿轮的加工方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI503558B (zh) * | 2014-03-28 | 2015-10-11 | Mpi Corp | 用以測試覆晶型發光二極體晶粒之設備 |
DE102023002331B3 (de) | 2023-06-09 | 2023-12-21 | Rainer Richardt | Elektrischer Marine-L-Antrieb und Verfahren zur Herstellung von Getriebekomponenten für den Marine-L-Antrieb |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11118023A (ja) * | 1997-10-09 | 1999-04-30 | Heishin Kikai Kogyo Kk | 歯車および歯車ポンプ |
JP2000257675A (ja) * | 1999-03-08 | 2000-09-19 | Kadowaki:Kk | 遊星歯車減速機およびその製造装置 |
JP2002070989A (ja) * | 2000-07-19 | 2002-03-08 | Meritor Heavy Vehicle Systems Llc | サーコイド形状のギヤ歯 |
-
2004
- 2004-02-23 JP JP2004046148A patent/JP2007192237A/ja active Pending
-
2005
- 2005-02-17 WO PCT/JP2005/002396 patent/WO2005080829A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11118023A (ja) * | 1997-10-09 | 1999-04-30 | Heishin Kikai Kogyo Kk | 歯車および歯車ポンプ |
JP2000257675A (ja) * | 1999-03-08 | 2000-09-19 | Kadowaki:Kk | 遊星歯車減速機およびその製造装置 |
JP2002070989A (ja) * | 2000-07-19 | 2002-03-08 | Meritor Heavy Vehicle Systems Llc | サーコイド形状のギヤ歯 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010121929A1 (de) * | 2009-04-21 | 2010-10-28 | Zf Lenksysteme Gmbh | Zahnstangenlenkung |
CN101890540A (zh) * | 2010-07-16 | 2010-11-24 | 扬州大学 | 一种弧齿圆柱齿轮的加工方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2007192237A (ja) | 2007-08-02 |
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