JP2840091B2 - Transmission gear structure - Google Patents
Transmission gear structureInfo
- Publication number
- JP2840091B2 JP2840091B2 JP1293083A JP29308389A JP2840091B2 JP 2840091 B2 JP2840091 B2 JP 2840091B2 JP 1293083 A JP1293083 A JP 1293083A JP 29308389 A JP29308389 A JP 29308389A JP 2840091 B2 JP2840091 B2 JP 2840091B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission gear
- width direction
- tooth
- ring member
- tooth width
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/02—Arrangements for synchronisation, also for power-operated clutches
- F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
- F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
-
- 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
- F16H55/17—Toothed wheels
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/02—Arrangements for synchronisation, also for power-operated clutches
- F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
- F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
- F16D2023/0625—Details of members being coupled, e.g. gears
-
- 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
- F16H55/17—Toothed wheels
- F16H55/171—Toothed belt pulleys
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Mechanical Operated Clutches (AREA)
- Structure Of Transmissions (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、ミッションギヤ本体と同期歯リング部材と
が電子ビーム溶接等の高密度エネルギービームにより溶
接されるようにした自動車用等のミッションギヤ構造に
関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a transmission gear for an automobile or the like in which a transmission gear body and a synchronous tooth ring member are welded by a high-density energy beam such as electron beam welding. Regarding the structure.
（従来の技術） 従来より、この種ミッションギヤ構造として、例えば
特開昭56−91977号公報に開示されるように、一端面側
に外方へ突出するコーン部を有するとともに他端面側に
ギヤ部を有し、且つ該コーン部とギヤ部との間の外周部
に環状の切欠段部が設けられたミッションギヤ本体と、
該ミッションギヤ本体の切欠段部に嵌合可能な内周部を
有する同期歯リング部材とを備え、該同期歯リング部材
の内周部と上記ミッションギヤ本体の切欠段部の立壁面
とをミッションギヤ本体の歯幅方向一端面側（コーン部
側）からの高密度エネルギービームにより溶接するよう
にしたものは知られている。2. Description of the Related Art Conventionally, as a transmission gear structure of this type, for example, as disclosed in Japanese Patent Application Laid-Open No. 56-91977, there is a cone portion protruding outward on one end surface and a gear on the other end surface. A transmission gear body having a portion, and an annular cutout step provided on an outer peripheral portion between the cone portion and the gear portion;
A synchronous tooth ring member having an inner peripheral portion that can be fitted into the notch step portion of the transmission gear main body, wherein the inner peripheral portion of the synchronous tooth ring member and the upright wall surface of the notch step portion of the transmission gear main body are transmitted by a transmission. It is known that the gear body is welded by a high-density energy beam from one end face side (cone part side) in the face width direction of the gear body.
そして、この高密度エネルギービームによる溶接は、
通電加熱されたタングステンフィラメントから放出され
る熱電子をアノード電圧で加速して高速の電子ビームを
作り、この電子ビームを、その行路中の電磁レンズによ
って母材に焦点を結ばせるように集中させて、その際の
衝撃の発熱により母材を溶融・溶接させることによりな
されている。また、高密度エネルギービームの出力は電
気的に正確に一定制御されている。And welding with this high density energy beam,
Thermionic electrons emitted from the heated tungsten filament are accelerated by the anode voltage to create a high-speed electron beam, and this electron beam is concentrated so that it is focused on the base material by the electromagnetic lens in its path. This is done by melting and welding the base material by the heat generated by the impact at that time. Further, the output of the high-density energy beam is electrically and precisely controlled to be constant.
（発明が解決しようとする課題） ところで、互いに嵌合する２つの環状の母材、すなわ
ち同期歯リング部材の内周部とミッションギヤ本体の切
欠段部の立壁面とを上述の高密度エネルギービームによ
り溶接する場合、同期歯リング部材の内周部とミッショ
ンギヤ本体の切欠段部の立壁面との間の僅かな隙間に対
しその隙間に沿って周方向へ順次同期歯リング部材の内
周部とミッションギヤ本体の切欠段部の立壁面とを溶融
させながら再び基のスタート点に戻るよう全周溶接する
ことが行われる。このため、同期歯リング部材とミッシ
ョンギヤ本体との溶接部付近が溶融によりスタート点か
ら順次熱変形を起こし、再び基のスタート点に戻る溶接
終期には同期歯リング部材の内周部とミッションギヤ本
体の切欠段部の立壁面とが合致しないという問題があ
る。(Problems to be Solved by the Invention) By the way, the two annular base materials fitted to each other, that is, the inner peripheral portion of the synchronous tooth ring member and the upright wall surface of the notch step portion of the transmission gear main body are connected to the above-described high-density energy beam. In the case of welding, the inner peripheral portion of the synchronous tooth ring member is sequentially arranged in the circumferential direction along the small gap between the inner peripheral portion of the synchronous tooth ring member and the vertical wall surface of the cutout step portion of the transmission gear body. The entire circumference is welded so as to return to the original starting point again while melting and the upright wall surface of the notch step portion of the transmission gear body. For this reason, the vicinity of the welded portion between the synchronous tooth ring member and the transmission gear body undergoes thermal deformation sequentially from the start point due to melting, and at the end of welding when returning to the original start point again, the inner peripheral portion of the synchronous tooth ring member and the transmission gear There is a problem that the vertical wall surface of the notch step portion of the main body does not match.
そこで、本出願人は、先に、特願昭63−180571号にお
いて、同期歯リング部材の他端面が当接するミッション
ギヤ本体の切欠段部の座面（当接面）に、その歯幅方向
他端面側へ凹む環状凹部を設ける一方、同期歯リング部
材の歯幅方向他端面側に、上記環状凹部に嵌合する環状
凸部を設けることにより、同期歯リング部材の内周部と
ミッションギヤ本体の切欠段部の立壁面とを全周溶接す
る際の溶融による溶接部付近の熱変形を規制して、溶接
終期において同期歯リング部材の内周部とミッションギ
ヤ本体の切欠段部の立壁面とが合致するようにしたもの
を提案している。In view of this, the present applicant has previously disclosed in Japanese Patent Application No. 63-180571, a seating surface (abutting surface) of a notch step portion of a transmission gear body with which the other end surface of a synchronous tooth ring member abuts. By providing an annular concave portion recessed toward the other end surface side, and providing an annular convex portion fitted to the annular concave portion on the other end surface side in the tooth width direction of the synchronous tooth ring member, the inner peripheral portion of the synchronous tooth ring member and the transmission gear are provided. In the final stage of welding, thermal deformation near the welded part due to melting when welding the entire wall of the notch step of the main body to the notch step is regulated, and the inner peripheral part of the synchronous tooth ring member and the notch step of the transmission gear body are set up at the end of welding. It proposes one that matches the wall surface.
しかしながら、本出願人らが、上述した高密度エネル
ギービームによる溶接部付近の熱変形について研究を重
ねたところ、ミッションギヤ本体の歯幅方向一端面側か
らの高密度エネルギービームにより同期歯リング部材の
内周部とミッションギヤ本体の切欠段部の立壁面とを溶
接する場合、この溶接部に対し高密度エネルギービーム
が高速で集中的に作用（衝突）するため、高密度エネル
ギービームの出力が電気的に一定制御されているにも拘
らず、同期歯リング部材の内周部とミッションギヤ本体
の切欠段部の立壁面との間の僅かな隙間の違いなどによ
って、その隙間に対する溶け込み深さが不均一なものと
なっていることを見出した。すなわち、同期歯リング部
材の内周部とミッションギヤ本体の切欠段部の立壁面と
の間の僅かな隙間の違いなどによって、その隙間の最深
部（環状凸部の他端面と当接するミッションギヤ本体の
切欠段部の環状凹部の底面）まで高密度エネルギービー
ムによる溶け込みが侵入する恐れがある。このため、上
記隙間の最深部（ギヤ部の歯幅方向一端面側の半径方向
内方）においてミッションギヤ本体が熱収縮し、この熱
収縮により半径方向外方に位置するギヤ部の歯幅方向一
端面側の歯端面が半径方向内方へ引き込まれるように変
形、具体的にはギヤ部の歯幅方向一端面側の歯端面がコ
ーン部側（ミッションギヤ本体の歯幅方向一端面側）に
向かって反り返るように変形することが危惧される。However, the present applicants have repeatedly studied the thermal deformation near the welded portion due to the above-described high-density energy beam. When the inner peripheral portion is welded to the upright wall surface of the notch step of the transmission gear body, the high-density energy beam acts at high speed and intensively (collides) with this weld, so that the output of the high-density energy beam is electric. Despite being controlled to be constant, the penetration depth into the gap due to the slight difference in the gap between the inner peripheral part of the synchronous tooth ring member and the upright wall of the notch step of the transmission gear body, etc. I found that it was uneven. That is, due to a slight difference in the gap between the inner peripheral portion of the synchronous tooth ring member and the upright wall surface of the notch step portion of the transmission gear body, the deepest portion of the gap (the transmission gear contacting the other end surface of the annular convex portion). There is a possibility that penetration by the high-density energy beam may penetrate into the notch step of the main body (the bottom surface of the annular concave portion). For this reason, the transmission gear body thermally contracts at the deepest portion of the gap (inward in the radial direction at one end face side of the gear portion in the tooth width direction), and the thermal contraction causes the tooth width direction of the gear portion located radially outward. The tooth end face on one end face side is deformed so as to be drawn inward in the radial direction. Specifically, the tooth end face on one end face side in the tooth width direction of the gear portion is on the cone side (one end face side in the tooth width direction of the transmission gear body). It is feared that it will be deformed to warp toward.
本発明はかかる点に鑑みてなされたもので、その目的
とするところは、上記提案の同期歯リング部材の内周部
及びミッションギヤ本体の切欠段部の立壁面に、熱収縮
による悪影響が半径方向外方に位置するギヤ部の歯幅方
向一端面側に及ばないような改良をさらに加えることに
より、ギヤ部の歯幅方向一端面側の歯端面がコーン部側
に向かって反り返るような変形を防止しようとするもの
である。The present invention has been made in view of such a point, and it is an object of the present invention that an adverse effect due to heat shrinkage is caused on the inner peripheral portion of the synchronous tooth ring member and the upright wall surface of the notch step portion of the transmission gear body. Deformation such that the tooth end face on the one end side in the tooth width direction of the gear part warps toward the cone side by further improving the gear part located on the outer side in the direction of the tooth width direction. It is to try to prevent.
（課題を解決するための手段） 上記目的を達成するため、本発明の解決手段は、歯幅
方向一端面側に外方へ突出するコーン部を有するととも
に歯幅方向他端面側にギヤ部を有し、かつ上記コーン部
とギヤ部との間の外周部に環状の切欠段部が設けられた
ミッションギヤ本体と、このミッションギヤ本体の切欠
段部に嵌合可能な内周部を有する同期歯リング部材とを
備え、上記同期歯リング部材の内周部と上記ミッション
ギヤ本体の切欠段部の立壁面とをミッションギヤ本体の
歯幅方向一端面側からの高密度エネルギービームにより
接合するようにしたミッションギヤ構造を前提とする。
そして、上記ミッションギヤ本体の切欠段部に、その立
壁面を上記ギヤ部の歯幅方向一端面側における歯端面よ
りも上記ギヤ部の歯幅方向他端面側に連続して延ばすよ
うに上記ミッションギヤ本体の歯幅方向他端面側に凹む
環状凹部を設ける。また、上記同期歯リング部材の内周
部に、上記環状凹部に嵌合するよう上記ミッションギヤ
本体の歯幅方向他端面側に突出する環状凸部が設ける構
成としたものである。(Means for Solving the Problems) In order to achieve the above object, a solution of the present invention includes a cone portion protruding outward on one end surface side in the tooth width direction and a gear portion on the other end surface side in the tooth width direction. A synchronous gear having a transmission gear body having an annular notch step on an outer peripheral part between the cone part and the gear part, and an inner peripheral part fittable into the notch step part of the transmission gear body. A tooth ring member, and an inner peripheral portion of the synchronous tooth ring member and an upright wall surface of the notch step portion of the transmission gear main body are joined by a high-density energy beam from one end face side in the tooth width direction of the transmission gear main body. It is assumed that the transmission gear structure described above is used.
The transmission is formed such that an upright wall surface of the notch step portion of the transmission gear body is continuously extended to the other end surface side in the tooth width direction of the gear portion from the tooth end surface at one end surface side in the tooth width direction of the gear portion. An annular recess is provided on the other end face side of the gear body in the tooth width direction. Further, an annular convex portion is provided on an inner peripheral portion of the synchronous tooth ring member so as to fit into the annular concave portion and protrudes toward the other end surface side in the tooth width direction of the transmission gear body.
（作用） 上記の構成により、本発明では、ミッションギヤ本体
の歯幅方向一端面側からの高密度エネルギービームによ
り同期歯リング部材の内周部とミッションギヤ本体の切
欠段部の立壁面とを全周溶接する場合、スタート点から
の溶接部付近の溶融による熱変形は、ミッションギヤ本
体の切欠段部の立壁面を歯幅方向他端面側（ミッション
ギヤ本体の歯幅方向他端面側）へ延ばした環状凹部と、
同期歯リング部材の内周部の歯幅方向他端面側の環状凸
部とが嵌合されていることによって規制され、再び基の
位置に戻る溶接終期の同期歯リング部材の内周部とミッ
ションギヤ本体の切欠段部の立壁面とが円滑に合致する
ようにしている。(Operation) With the above configuration, according to the present invention, the inner peripheral portion of the synchronous tooth ring member and the upright wall surface of the notch step portion of the transmission gear main body are formed by the high-density energy beam from one end face side in the face width direction of the transmission gear main body. In the case of full circumference welding, thermal deformation due to melting near the welded portion from the starting point is caused by raising the vertical wall surface of the notch step portion of the transmission gear body to the other end face in the tooth width direction (the other end face in the tooth width direction of the transmission gear body). An elongated annular recess,
The inner peripheral portion of the synchronous tooth ring member and the transmission at the end of welding are regulated by the fitting of the annular convex portion on the other end surface side in the tooth width direction of the inner peripheral portion of the synchronous tooth ring member and return to the original position. The notch step portion of the gear body smoothly matches the upright wall surface.
その場合、環状凹部は、ミッションギヤ本体の切欠段
部の立壁面をギヤ部の歯幅方向一端面側における歯端面
よりも上記ギヤ部の歯幅方向他端面側に連続して延ばす
ようにミッションギヤ本体の歯幅方向他端面側に凹設さ
れているので、同期歯リング部材の内周部とミッション
ギヤ本体の切欠段部の立壁面との溶接が電気的に出力を
一定制御した高密度エネルギービームにより行われてい
るにも拘らず、その溶け込み深さが隙間の最深部まで侵
入しても、その隙間の最深部（ギヤ部の歯幅方向一端面
側の半径方向内方位置）においてミッションギヤ本体が
熱収縮する際の半径方向外方への悪影響が同期歯リング
部材の環状凸部により阻まれることになる。これによ
り、環状凹部の半径方向外方に位置するギヤ部の歯幅方
向一端面側に熱収縮による悪影響が及ぶことが規制さ
れ、熱収縮によりギヤ部の歯幅方向一端面側の歯端面が
コーン部側（ミッションギヤ本体の歯幅方向一端面側）
に向かって反り返るように変形することが確実に防止さ
れることになる。In this case, the annular recess is formed so that the upright wall surface of the notch step portion of the transmission gear body extends continuously from the tooth end surface at the one end surface side in the tooth width direction of the gear portion to the other end surface side in the tooth width direction of the gear portion. Since the gear body is recessed on the other end face side in the face width direction, the welding between the inner peripheral portion of the synchronous tooth ring member and the upright wall surface of the cutout step portion of the transmission gear body electrically controls the output to a high density. Despite the energy beam being used, even if the penetration depth penetrates to the deepest part of the gap, at the deepest part of the gap (the radially inner position on one end face side in the tooth width direction of the gear part) An adverse effect on the outside in the radial direction when the transmission gear body thermally contracts is prevented by the annular convex portion of the synchronous tooth ring member. This restricts the adverse effect of the heat shrinkage on one end face in the tooth width direction of the gear portion located radially outward of the annular concave portion, and causes the tooth end face on the one end face in the tooth width direction of the gear portion due to the heat shrinkage. Cone section side (one end face side in the tooth width direction of the transmission gear body)
Deformation so as to warp toward is surely prevented.
また、ミッションギヤ本体の切欠段部の立壁面をギヤ
部の歯幅方向一端面側における歯端面よりも上記ギヤ部
の歯幅方向他端面側に連続して延ばす環状凹部と、同期
歯リング部材の内周部の環状凸部とが嵌合していること
により、同期歯リング部材の内周部とミッションギヤ本
体の切欠段部との互いの接合部がミッションギヤ本体の
歯幅方向他端面側に延長されることになり、この接合部
における接合強度が効果的に高められる。An annular concave portion extending continuously from a tooth end surface of the gear portion in the tooth width direction to the other end surface in the tooth width direction of the gear portion; and a synchronous tooth ring member. The annular convex portion of the inner peripheral portion of the transmission gear body is fitted, so that the joint portion between the inner peripheral portion of the synchronous tooth ring member and the cutout step portion of the transmission gear main body is the other end face in the tooth width direction of the transmission gear main body. Therefore, the joint strength at this joint is effectively increased.
（実施例） 以下、本発明の実施例を図面に基づいて説明する。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図および第２図は本発明の実施例に係るミッショ
ンギヤ構造を構成するミッションギヤ本体および同期歯
リング部材を示す。これらの図において、ミッションギ
ヤ本体１は環状体をなし、その歯幅方向一端面側（図で
は上端面側）には、中空の円錐台状部をなすコーン部２
が外方（上方）へ突出して設けられている。また、斯か
るミッションギヤ本体１の歯幅方向他端面側（図では下
端面側）には、上記コーン部２よりも大径なギヤ部とし
てのヘリカルギヤ部３を形成しており、例えば、機械切
削加工により得られるものとされる。そして、上記コー
ン部２とヘリカルギヤ部３との間に位置するミッション
ギヤ本体１の外周部には、環状の切欠段部４が設けられ
ている。1 and 2 show a transmission gear main body and a synchronous tooth ring member constituting a transmission gear structure according to an embodiment of the present invention. In these figures, the transmission gear body 1 has an annular shape, and a cone portion 2 having a hollow frustoconical portion is provided on one end face side (the upper end face side in the figure) in the tooth width direction.
Are provided to protrude outward (upward). A helical gear portion 3 as a gear portion having a larger diameter than the cone portion 2 is formed on the other end surface side (the lower end surface side in the figure) of the transmission gear body 1 in the tooth width direction. It shall be obtained by cutting. An annular notch step 4 is provided on the outer peripheral portion of the transmission gear body 1 located between the cone portion 2 and the helical gear portion 3.
また、同期歯リング部材11は、ミッションギヤ本体１
に比して厚みが著しく小とされた環状体をなすものとさ
れ、例えば鍛造成形により得られるものとされる。上記
同期歯リング部材11の外周部には、多数のスプライン歯
12が設けられている。また、同期歯リング部材11の内周
部11aは、上記ミッションギヤ本体１の切欠段部４に対
し嵌合可能に構成されている。Further, the synchronous tooth ring member 11 is provided in the transmission gear body 1.
The annular body has a thickness significantly smaller than that of the annular body, and is obtained, for example, by forging. On the outer peripheral portion of the synchronous tooth ring member 11, a large number of spline teeth
There are twelve. Further, the inner peripheral portion 11a of the synchronous tooth ring member 11 is configured to be fitted to the notch step 4 of the transmission gear body 1.
斯かるミッションギヤ本体１と同期歯リング部材11と
は、同期歯リング部材11の内周部11aをミッションギヤ
本体１の切欠段部４の立壁面4aに嵌合せしめた状態で、
ミッションギヤ本体１の歯幅方向一端面側（コーン部２
側）からの出力を電気的に一定制御した高密度エネルギ
ービームにより溶接されてミッションギヤ21が構成され
るようになっている。そして、上記ミッションギヤ本体
１の切欠段部４には、その立壁面4aを上記ヘリカルギヤ
部３の歯幅方向一端面側における歯端面よりも上記ヘリ
カルギヤ部３の歯幅方向他端面側に連続して延ばすよう
に上記ミッションギヤ本体１の歯幅方向他端面側に凹む
環状凹部22が設けられている。一方、上記同期歯リング
部材11の内周部11aの歯幅方向他端面側には、上記環状
凹部22に嵌合するよう上記ミッションギヤ本体１の歯幅
方向他端面側に突出する環状凸部23が設けられている。
また、上記環状凹部22と環状凸部23とにより、同期歯リ
ング部材11の内周部11aとミッションギヤ本体１の切欠
段部４の立壁面4aとの接合部24がミッションギヤ本体１
の歯幅方向他端面側に延長されるようになっている。The transmission gear main body 1 and the synchronous tooth ring member 11 are in a state where the inner peripheral portion 11a of the synchronous tooth ring member 11 is fitted to the upright wall surface 4a of the notch step portion 4 of the transmission gear main body 1.
One end face side of the transmission gear body 1 in the face width direction (cone part 2
The transmission gear 21 is formed by welding with a high-density energy beam whose output from the side (i.e., side) is controlled electrically. The notch step portion 4 of the transmission gear body 1 has its upright wall surface 4a connected to the other end surface side of the helical gear portion 3 in the tooth width direction than the tooth end surface of the helical gear portion 3 at one end surface in the tooth width direction. An annular concave portion 22 is provided on the other end surface side of the transmission gear body 1 in the tooth width direction so as to extend. On the other hand, on the other end surface side in the tooth width direction of the inner peripheral portion 11a of the synchronous tooth ring member 11, an annular convex portion protruding toward the other end surface side in the tooth width direction of the transmission gear body 1 so as to fit into the annular concave portion 22. 23 are provided.
The joint 24 between the inner peripheral portion 11a of the synchronous tooth ring member 11 and the upright wall surface 4a of the notch step 4 of the transmission gear body 1 is formed by the annular recess 22 and the annular protrusion 23.
Are extended to the other end face side in the face width direction.
したがって、上記実施例では、ミッションギヤ本体１
の歯幅方向一端面側からの高密度エネルギービームによ
り同期歯リング部材11の内周部とミッションギヤ本体１
の切欠段部４の立壁面4aとを溶接する場合、スタート点
からの溶接部24付近の溶融による熱変形は、ミッション
ギヤ本体１の切欠段部４の立壁面4aを歯幅方向他端面側
（図２ではミッションギヤ本体１の下端面側）へ延ばす
環状凹部22と、同期歯リング部材11の内周部11a他端面
側（図２では下端面側）の環状凸部23とが嵌合されてい
ることによって規制され、再び基の位置に戻る溶接終期
の同期歯リング部材11の内周部11aとミッションギヤ本
体１の切欠段部４の立壁面4aとが円滑に合致するように
している。Therefore, in the above embodiment, the transmission gear body 1
The inner peripheral portion of the synchronous tooth ring member 11 and the transmission gear main body 1 are driven by a high-density energy beam from one end face in the tooth width direction.
When the notch step 4 is welded to the upright wall surface 4a, the thermal deformation due to melting near the welded portion 24 from the start point is caused by the upright wall surface 4a of the notch step portion 4 of the transmission gear body 1 facing the other end face in the face width direction. The annular concave portion 22 extending to the lower end surface side of the transmission gear main body 1 in FIG. 2 and the annular convex portion 23 on the other end surface side of the inner peripheral portion 11a of the synchronous tooth ring member 11 (the lower end surface side in FIG. 2) are fitted. The inner peripheral portion 11a of the synchronous tooth ring member 11 at the end of welding and the upright wall surface 4a of the notch step portion 4 of the transmission gear body 1 smoothly return to the original position. I have.
その場合、環状凹部22は、ミッションギヤ本体１の切
欠段部４の立壁面4aをヘリカルギヤ部３の歯幅方向一端
面側における歯端面よりも上記ヘリカルギヤ部３の歯幅
方向他端面側に連続して延ばすようにミッションギヤ本
体１の歯幅方向他端面側に凹設されているので、第１図
の仮想線（二点鎖線）で示すように、同期歯リング部材
11の内周部とミッションギヤ本体１の切欠段部４の立壁
面4aとの溶接が電気的に出力を一定制御した高密度エネ
ルギービームにより行われているにも拘らず、その溶け
込み深さが同期歯リング部材11の内周部とミッションギ
ヤ本体１の切欠段部４の立壁面4aとの間の隙間の最深部
（同期歯リング部材11の環状凸部23の他端面が当接する
ミッションギヤ本体１の切欠段部４の環状凹部22の底
面）まで侵入しても、その隙間の最深部（ヘリカルギヤ
部３の歯幅方向一端面側の半径方向内方位置）において
ミッションギヤ本体１が溶融により熱収縮する際の半径
方向外方への悪影響が同期歯リング部材11の環状凸部23
により阻まれることになる。これにより、ミッションギ
ヤ本体１の環状凹部22の半径方向外方に位置するヘリカ
ルギヤ部３の歯幅方向一端面側に熱収縮による悪影響を
及ぼすことが規制され、熱収縮によりヘリカルギヤ部３
の歯幅方向一端面側の歯端面が半径方向内方へ引き込ま
れるような変形、つまりヘリカルギヤ部３の歯幅方向一
端面側の歯端面がコーン部２側（ミッションギヤ本体１
の歯幅方向一端面側）に向かって反り返るような変形を
確実に防止することができる。In this case, the annular concave portion 22 connects the upright wall surface 4a of the notch step portion 4 of the transmission gear main body 1 to the other end surface side of the helical gear portion 3 in the tooth width direction with respect to the tooth end surface at one end surface side of the helical gear portion 3 in the tooth width direction. As shown by the phantom line (two-dot chain line) in FIG. 1, the synchronous gear ring member
Despite the fact that the inner peripheral portion of 11 and the upright wall 4a of the notch step portion 4 of the transmission gear body 1 are welded by a high-density energy beam whose output is controlled to be constant, the penetration depth is The deepest portion of the gap between the inner peripheral portion of the synchronous tooth ring member 11 and the upright wall surface 4a of the notch step portion 4 of the transmission gear body 1 (the transmission gear with which the other end surface of the annular convex portion 23 of the synchronous tooth ring member 11 abuts) The transmission gear main body 1 melts at the deepest part of the gap (the radially inner position on the one end face side in the tooth width direction of the helical gear part 3) even if it penetrates into the notch step 4 of the main body 1 to the bottom of the annular recess 22. The adverse effect on the outside in the radial direction when heat shrinks due to the annular convex portion 23 of the synchronous tooth ring member 11
Will be hampered by As a result, adverse effects due to thermal contraction on one end surface in the face width direction of the helical gear portion 3 located radially outward of the annular concave portion 22 of the transmission gear main body 1 are restricted, and the helical gear portion 3 is restricted by thermal contraction.
Is deformed such that the tooth end surface on the one end surface side in the tooth width direction is drawn inward in the radial direction, that is, the tooth end surface on the one end surface side in the tooth width direction of the helical gear portion 3 is on the cone portion 2 side (the transmission gear body 1).
(The one end face in the tooth width direction) can be reliably prevented from being deformed.
しかも、ミッションギヤ本体１の切欠段部４の立壁面
4aをヘリカルギヤ部３の歯幅方向一端面側における歯端
面よりも上記ヘリカルギヤ部３の歯幅方向他端面側に連
続して延ばす環状凹部22と、同期歯リング部材11の内周
部11aの環状凸部23とが嵌合していることにより、同期
歯リング部材11の内周部11aとミッションギヤ本体１の
切欠段部４との互いの接合部24がミッションギヤ本体１
の歯幅方向他端面側に延長されることになり、この接合
部24における接合強度を効果的に高めることができる。Moreover, the upright wall surface of the notch step portion 4 of the transmission gear body 1
An annular recess 22 extending continuously from the tooth end face on the one end face side in the tooth width direction of the helical gear section 3 to the other end face side in the face width direction of the helical gear section 3; and an annular ring of the inner peripheral section 11a of the synchronous tooth ring member 11 Since the convex portion 23 is fitted, the joint 24 between the inner peripheral portion 11a of the synchronous tooth ring member 11 and the notch step portion 4 of the transmission gear main body 1 is connected to the transmission gear main body 1.
Therefore, the bonding strength at the bonding portion 24 can be effectively increased.
（発明の効果） 以上の如く、本発明におけるミッションギヤ構造によ
れば、ミッションギヤ本体の切欠段部の立壁面をギヤ部
の歯幅方向一端面側における歯端面よりも上記ギヤ部の
歯幅方向他端面側に連続して延ばす環状凹部を設ける一
方、この環状凹部に嵌合する環状凸部をミッションギヤ
本体の歯幅方向他端面側に突出させたので、ミッション
ギヤ本体の歯幅方向一端面側から同期歯リング部材の内
周部とミッションギヤ本体の切欠段部の立壁面とを溶接
する際にその隙間の最深部まで溶け込み深さが侵入して
も、その熱収縮による半径方向外方への悪影響を同期歯
リング部材の環状凸部により阻んで、環状凹部の半径方
向外方に位置するギヤ部の歯幅方向一端面側への熱収縮
による悪影響を規制し、熱収縮によりギヤ部の歯幅方向
一端面側の歯端面をコーン部側に向かって反り返らせる
ような変形を確実に防止することができる。しかも、ミ
ッションギヤ本体の切欠段部の立壁面をギヤ部の歯幅方
向一端面側における歯端面よりも上記ギヤ部の歯幅方向
他端面側に連続して延ばす環状凹部と、同期歯リング部
材の内周部の環状凸部との嵌合により、同期歯リング部
材の内周部とミッションギヤ本体の切欠段部との互いの
接合部をミッションギヤ本体の歯幅方向他端面側に延長
させ、この接合部における接合強度を効果的に高めるこ
とができる。(Effects of the Invention) As described above, according to the transmission gear structure of the present invention, the upright wall surface of the notch step portion of the transmission gear main body is larger than the tooth width of the gear portion at one end surface side in the tooth width direction of the gear portion. An annular concave portion is provided on the other end surface of the transmission gear in the direction of the width of the transmission gear body. When welding the inner peripheral portion of the synchronous tooth ring member and the upright wall surface of the notch step of the transmission gear body from the end face side, even if the penetration depth penetrates to the deepest part of the gap, the outer part in the radial direction due to the heat shrinkage The adverse effect on the gear portion is prevented by the annular convex portion of the synchronous tooth ring member, and the adverse effect due to the thermal contraction of the gear portion located radially outward of the annular concave portion toward one end surface in the tooth width direction is restricted. One end in the tooth width direction It is possible to reliably prevent deformation such that the tooth end surface on the surface side warps toward the cone portion side. In addition, an annular recess that extends the upright wall surface of the notch step portion of the transmission gear body more continuously from the tooth end surface at the one end surface side in the tooth width direction of the gear portion to the other end surface side in the tooth width direction of the gear portion, and a synchronous tooth ring member By fitting the inner peripheral portion of the transmission gear ring member with the annular convex portion, the joint portion between the inner peripheral portion of the synchronous tooth ring member and the notch step portion of the transmission gear main body is extended to the other end face side in the tooth width direction of the transmission gear main body. Thus, the joining strength at this joint can be effectively increased.
図面は本発明の実施例を示すもので、第１図はミッショ
ンギヤの縦断正面図、第２図はミッションギヤの分解斜
視図である。 １……ミッションギヤ本体 ２……コーン部 ３……ヘリカルギヤ部（ギヤ部） ４……切欠段部 4a……立壁面 11……同期歯リング部材 11a……内周部 21……ミッションギヤ 22……環状凹部 23……環状凸部 24……溶接部The drawings show an embodiment of the present invention. FIG. 1 is a longitudinal sectional front view of a transmission gear, and FIG. 2 is an exploded perspective view of the transmission gear. DESCRIPTION OF SYMBOLS 1 ... Transmission gear main body 2 ... Cone part 3 ... Helical gear part (gear part) 4 ... Notch step part 4a ... Standing wall surface 11 ... Synchronous tooth ring member 11a ... Inner peripheral part 21 ... Transmission gear 22 …… Circular concave part 23 …… Circular convex part 24 …… Welded part
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｆ１６Ｈ 55/12 Ｆ１６Ｈ 55/12 Ｚ (56)参考文献 特開 昭52−154954（ＪＰ，Ａ) 特開 昭55−75888（ＪＰ，Ａ) 特開 昭58−213801（ＪＰ，Ａ) 特開 昭53−43046（ＪＰ，Ａ) 特開 昭56−91977（ＪＰ，Ａ) 特開 平２−31060（ＪＰ，Ａ) 特開 平３−153952（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) F16H 55/17,55/12,3/12 F16D 23/06 B23K 9/00 501 B23K 15/00 505────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. 6 Identification code FI F16H 55/12 F16H 55/12 Z (56) References JP-A-52-154954 (JP, A) JP-A-55-75888 ( JP, A) JP-A-58-213801 (JP, A) JP-A-53-43046 (JP, A) JP-A-56-91977 (JP, A) JP-A-2-31060 (JP, A) Hei 3-153952 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) F16H 55 / 17,55 / 12,3 / 12 F16D 23/06 B23K 9/00 501 B23K 15/00 505
Claims (1)
部を有するとともに歯幅方向他端面側にギヤ部を有し、
かつ上記コーン部とギヤ部との間の外周部に環状の切欠
段部が設けられたミッションギヤ本体と、このミッショ
ンギヤ本体の切欠段部に嵌合可能な内周部を有する同期
歯リング部材とを備え、上記同期歯リング部材の内周部
と上記ミッションギヤ本体の切欠段部の立壁面とをミッ
ションギヤ本体の歯幅方向一端面側からの高密度エネル
ギービームにより接合するようにしたミッションギヤ構
造において、 上記ミッションギヤ本体の切欠段部には、その立壁面を
上記ギヤ部の歯幅方向一端面側における歯端面よりも上
記ギヤ部の歯幅方向他端面側に連続して延ばすように上
記ミッションギヤ本体の歯幅方向他端面側に凹む環状凹
部が設けられ、 上記同期歯リング部材の内周部には、上記環状凹部に嵌
合するよう上記ミッションギヤ本体の歯幅方向他端面側
に突出する環状凸部が設けられている ことを特徴とするミッションギヤ構造。An externally protruding cone portion on one end face side in the tooth width direction and a gear portion on the other end face side in the tooth width direction;
A synchronous gear ring member having a transmission gear body having an annular notch step provided on an outer peripheral part between the cone part and the gear part, and an inner peripheral part capable of being fitted into the notch step part of the transmission gear body; Wherein the inner peripheral portion of the synchronous tooth ring member and the upright wall surface of the notch step portion of the transmission gear main body are joined by a high-density energy beam from one end face in the tooth width direction of the transmission gear main body. In the gear structure, the notch step portion of the transmission gear body may have a vertical wall surface extending continuously from the tooth end surface on the one end surface side in the tooth width direction of the gear portion to the other end surface side in the tooth width direction of the gear portion. An annular recess is provided at the other end face side in the tooth width direction of the transmission gear body, and a tooth width of the transmission gear body is fitted on the inner peripheral portion of the synchronous tooth ring member so as to fit into the annular recess. Transmission gear structure characterized in that the annular convex portion projecting toward the other end face side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1293083A JP2840091B2 (en) | 1989-11-10 | 1989-11-10 | Transmission gear structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1293083A JP2840091B2 (en) | 1989-11-10 | 1989-11-10 | Transmission gear structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03153953A JPH03153953A (en) | 1991-07-01 |
| JP2840091B2 true JP2840091B2 (en) | 1998-12-24 |
Family
ID=17790227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1293083A Expired - Lifetime JP2840091B2 (en) | 1989-11-10 | 1989-11-10 | Transmission gear structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2840091B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4028311B2 (en) * | 2002-07-15 | 2007-12-26 | 大岡技研株式会社 | Speed change gear with dog clutch gear and method for manufacturing speed change gear with dog clutch gear |
| ES2341565T3 (en) * | 2006-03-22 | 2010-06-22 | Feintool Intellectual Property Ag | ARTICULATED HARDWARE HOUSING OF A CAR SEAT AND PROCEDURE FOR PRODUCTION. |
| JP2008069894A (en) * | 2006-09-14 | 2008-03-27 | Aichi Mach Ind Co Ltd | Gear and transmission equipped therewith, as well as gear manufacturing method |
| CN107387729A (en) * | 2017-09-14 | 2017-11-24 | 浙江奥真电子科技有限公司 | Alloy travelling gear |
-
1989
- 1989-11-10 JP JP1293083A patent/JP2840091B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03153953A (en) | 1991-07-01 |
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