JP2020148257A - Fixing structure of rotary member - Google Patents

Fixing structure of rotary member Download PDF

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Publication number
JP2020148257A
JP2020148257A JP2019046256A JP2019046256A JP2020148257A JP 2020148257 A JP2020148257 A JP 2020148257A JP 2019046256 A JP2019046256 A JP 2019046256A JP 2019046256 A JP2019046256 A JP 2019046256A JP 2020148257 A JP2020148257 A JP 2020148257A
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Japan
Prior art keywords
cotter
cover
rotating shaft
fitted
rotating member
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JP2019046256A
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Japanese (ja)
Inventor
将司 野村
Shoji Nomura
将司 野村
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2019046256A priority Critical patent/JP2020148257A/en
Priority to CN202020155173.1U priority patent/CN211693441U/en
Publication of JP2020148257A publication Critical patent/JP2020148257A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F16B21/18Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
    • F16B21/186Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details external, i.e. with contracting action
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/0018Shaft assemblies for gearings
    • F16H57/0025Shaft assemblies for gearings with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • General Details Of Gearings (AREA)

Abstract

To provide a fixing structure of a rotary member that can position and fix a rotary member reliably with a simple configuration while reducing machining man-hours and the number of components to realize cost reduction and space saving.SOLUTION: As an axial positioning and fixing structure of a gear (rotary member) 3 that is spline-fitted to a rotational shaft 2, employed is a structure in which a fitting groove 2b is formed on the outer periphery of the rotational shaft 2 over the entire circumference; also, two semicircular ring-shaped cotters 4 formed by dividing a circular ring plate into two are fitted to the fitting groove 2b so that one end of the gear 3 in an axial direction is brought into contact with the cotter 4; further, a wave spring 5 is contracted in a ring-shaped space S formed between the inside of the fitting groove 2b and the cotter 4; and moreover, a cotter cover 6 covering the outer periphery of the cotter 4 is press-fitted to the rotational shaft 2.SELECTED DRAWING: Figure 1

Description

本発明は、回転軸にスプライン嵌合するギヤなどの回転部材の軸方向移動を阻止してこれを位置決め固定するための回転部材の固定構造に関する。 The present invention relates to a fixing structure of a rotating member for preventing axial movement of a rotating member such as a gear spline-fitted to the rotating shaft and positioning and fixing the rotating member.

例えば、車両の動力伝達経路には大小異径の複数の減速ギヤが配置されているが、これらの減速ギヤには、回転軸にスプライン嵌合によって連結されるものがある。ここで、回転軸にスプライン嵌合する減速ギヤは、回転軸に沿って軸方向に移動可能であるため、一般的には、回転軸の外周に形成された嵌合溝に装着されたセットリング(スナップリング)によって減速ギヤの軸方向移動を阻止する構成が採用されている。 For example, a plurality of reduction gears having different diameters, large and small, are arranged in a power transmission path of a vehicle, and some of these reduction gears are connected to a rotating shaft by spline fitting. Here, since the reduction gear that is spline-fitted to the rotating shaft can move in the axial direction along the rotating shaft, generally, a set ring mounted on a fitting groove formed on the outer periphery of the rotating shaft. A configuration is adopted in which the (snap ring) prevents the reduction gear from moving in the axial direction.

ところが、セットリングは、一部が切り欠かれたCリング状の金属部材であって、これを回転軸の嵌合溝に装着するには、その切欠部を押し広げるようにして全体を開拡させ、回転軸を乗り越えて嵌合溝に装着する必要がある。このため、セットリングは、弾性変形可能である必要があり、このために該セットリングの厚さを余り大きくすることができず、セットリングが回転部材から受けることができるスラスト力の大きさには限界がある。 However, the set ring is a C-ring-shaped metal member with a part cut out, and in order to attach it to the fitting groove of the rotating shaft, the cutout portion is pushed open to expand the whole. It is necessary to get over the rotating shaft and mount it in the fitting groove. Therefore, the set ring needs to be elastically deformable, so that the thickness of the set ring cannot be increased so much that the set ring has a large thrust force that can be received from the rotating member. Has a limit.

そこで、特許文献1には、セットリングよりは厚さの厚い円形リングプレートを2分割して成る半円リング状の2つのコッターを用いて回転部材の軸方向移動を規制する軸方向位置決め構造が提案されている。具体的には、この位置決め構造は、2つのコッターを回転軸の外周に形成された嵌合溝に嵌め込み、これらのコッターの径方向外方への抜けを防ぐためのコッターカバーを設け、このコッターカバーを、回転軸の外周に形成された嵌合溝に嵌合するセットリング(サークリップ)によって保持するものである。 Therefore, Patent Document 1 provides an axial positioning structure that regulates the axial movement of a rotating member by using two semicircular ring-shaped cotters formed by dividing a circular ring plate thicker than a set ring into two parts. Proposed. Specifically, in this positioning structure, two cotters are fitted into a fitting groove formed on the outer circumference of the rotating shaft, and a cotter cover is provided to prevent the cotters from coming off in the radial direction. The cover is held by a set ring (circlip) that fits into a fitting groove formed on the outer circumference of the rotating shaft.

また、特許文献2には、回転軸の外周に2つの嵌合溝を形成し、これらの嵌合溝にコッターとセットリング(サークリップ)をそれぞれ嵌め込み、これらのコッターとセットリングの径方向外方への抜けを1つのコッターカバーによって防ぐようにした構成が提案されている。 Further, in Patent Document 2, two fitting grooves are formed on the outer periphery of the rotating shaft, and a cotter and a set ring (circlip) are fitted into these fitting grooves, respectively, and the cotter and the set ring are outside the radial direction. A configuration has been proposed in which a single cotter cover is used to prevent slipping out.

特開2001−200911号公報Japanese Unexamined Patent Publication No. 2001-900911 特許第5489954号公報Japanese Patent No. 5489954

しかしながら、特許文献1,2において提案された回転部材の軸方向位置決め構造においては、回転軸の外周にコッターとセットリングを嵌め込むための2つの嵌合溝を形成する必要があるとともに、コッターを保持するためのセットリング(サークリップ)が必要であるため、加工工数と部品点数が増え、コストアップを招くとともに、大きな設置スペースを要するという問題がある。 However, in the axial positioning structure of the rotating member proposed in Patent Documents 1 and 2, it is necessary to form two fitting grooves for fitting the cotter and the set ring on the outer periphery of the rotating shaft, and the cotter is provided. Since a set ring (circlip) for holding is required, there is a problem that the processing man-hours and the number of parts increase, which leads to an increase in cost and requires a large installation space.

また、特許文献1において提案された位置決め構造では、回転軸の高回転時にCリング状のセットリングが遠心力によって開いて回転軸から外れる可能性がある。これに対して、特許文献2において提案された位置決め構造では、セットリングの遠心力による外れは、コッターカバーによって防がれるが、このコッターカバーには、セットリングの外れを防ぐための複雑な構造が必要であるという問題がある。 Further, in the positioning structure proposed in Patent Document 1, there is a possibility that the C-ring-shaped set ring may be opened by centrifugal force and deviate from the rotating shaft when the rotating shaft is rotated at a high speed. On the other hand, in the positioning structure proposed in Patent Document 2, the cotter cover prevents the set ring from coming off due to the centrifugal force, but this cotter cover has a complicated structure for preventing the set ring from coming off. There is a problem that is necessary.

本発明は、上記問題に鑑みてなされたものであり、その目的は、加工工数と部品点数を削減してコストダウンと省スペース化を実現しつつ、簡単な構成で回転部材を確実に位置決め固定することができる回転部材の固定構造を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to reduce processing man-hours and the number of parts to realize cost reduction and space saving, and to securely position and fix a rotating member with a simple configuration. It is an object of the present invention to provide a fixed structure of a rotating member which can be used.

上記目的を達成するため、本発明は、回転軸(2)にスプライン嵌合する回転部材(3)の固定構造であって、前記回転軸(2)の外周に嵌合溝(2b)を全周に亘って形成し、円形リングプレートを2分割して成る半円リング状の2つのコッター(4)を前記嵌合溝(2b)に嵌合して該コッター(4)に前記回転部材(3)の軸方向一端を当接させるとともに、前記嵌合溝(2b)内において前記コッター(4)との間に形成されるリング状空間(S)にウェーブスプリング(5)を縮装し、前記コッター(4)の外周を覆うコッターカバー(6)を前記回転軸(2)に圧入して構成されることを特徴とする。 In order to achieve the above object, the present invention has a fixed structure of a rotating member (3) that is spline-fitted to the rotating shaft (2), and all fitting grooves (2b) are formed on the outer periphery of the rotating shaft (2). Two semi-circular ring-shaped cotters (4) formed over the circumference and formed by dividing the circular ring plate into two are fitted into the fitting groove (2b), and the rotating member (4) is fitted into the cotter (4). Along with contacting one end in the axial direction of 3), the wave spring (5) is reduced in the ring-shaped space (S) formed between the fitting groove (2b) and the cotter (4). The cotter cover (6) covering the outer periphery of the cotter (4) is press-fitted into the rotating shaft (2).

本発明に係る回転部材の固定構造によれば、コッターカバーを保持するためのセットリングが不要であるため、部品点数が削減されるとともに、回転軸に対してはコッターを嵌め込むための1つの嵌合溝を形成すればよいため、加工工数が削減され、コストダウンと省スペース化が図られる。そして、回転部材の回転軸上への位置決めがコッターによって確実になされ、回転部材のスラスト力がコッターによって受けられるとともに、コッターの遠心力による径方向外方への抜けがコッターカバーによって確実に防がれる。 According to the fixed structure of the rotating member according to the present invention, since the set ring for holding the cotter cover is not required, the number of parts is reduced and one for fitting the cotter into the rotating shaft. Since the fitting groove may be formed, the processing man-hours can be reduced, and cost reduction and space saving can be achieved. Then, the cotter ensures the positioning of the rotating member on the rotating shaft, the thrust force of the rotating member is received by the cotter, and the cotter cover reliably prevents the cotter from coming off in the radial direction due to the centrifugal force. Is done.

また、前記回転部材(3)の固定構造において、前記ウェーブスプリング(5)は、一部が切り欠かれた多角リング状に成形され、前記コッター(4)を径方向外方へと付勢するものとしてもよい。 Further, in the fixed structure of the rotating member (3), the wave spring (5) is formed into a polygonal ring shape in which a part is cut out, and the cotter (4) is urged outward in the radial direction. It may be a thing.

上記構成によれば、コッターは、ウェーブスプリングによって径方向外方へと常時付勢されるため、コッターとコッターカバーの寸法誤差が吸収され、コッターがコッターカバーに押圧されて該コッターカバーによって確実に保持される。 According to the above configuration, since the cotter is constantly urged outward in the radial direction by the wave spring, the dimensional error between the cotter and the cotter cover is absorbed, and the cotter is pressed against the cotter cover to ensure that the cotter cover presses the cotter. Be retained.

さらに、前記回転部材(3)の固定構造において、前記コッター(4)の外周に傾斜部(4a)と水平部(4b)および段凹部(4c)を軸方向に沿って形成し、前記コッターカバー(6)を、円形リングプレート状の垂直な本体部(6a)と、該本体部(6a)の外周から軸方向に沿って直角に折り曲げられた水平部(6b)と、該水平部(6b)の自由端から径方向内方に向かって直角に折り曲げられた係合突起(6c)とで構成し、前記コッターカバー(6)を前記回転軸(2)の外周に沿って軸方向に圧入することによって、該コッターカバー(6)の本体部(6a)と水平部(6b)を前記コッター(4)の軸方向一端面と水平部(4b)にそれぞれ当接させるとともに、同コッターカバー(6)の係合突起(6c)を前記コッター(4)の段凹部(4c)に係合させて当該コッターカバー(6)を前記コッター(4)に嵌着してもよい。 Further, in the fixed structure of the rotating member (3), an inclined portion (4a), a horizontal portion (4b) and a stepped recess (4c) are formed on the outer periphery of the cotter (4) along the axial direction to form the cotter cover. (6) is a circular ring plate-shaped vertical main body (6a), a horizontal portion (6b) bent at a right angle along the axial direction from the outer periphery of the main body (6a), and the horizontal portion (6b). ) Consists of an engaging protrusion (6c) bent at a right angle inward in the radial direction from the free end, and the cotter cover (6) is press-fitted axially along the outer circumference of the rotating shaft (2). By doing so, the main body portion (6a) and the horizontal portion (6b) of the cotter cover (6) are brought into contact with the axial end surface and the horizontal portion (4b) of the cotter cover (4), respectively, and the cotter cover (6b) The engaging projection (6c) of 6) may be engaged with the stepped recess (4c) of the cotter (4) to fit the cotter cover (6) to the cotter (4).

上記構成によれば、コッターカバーを回転軸の外周に沿って軸方向に圧入するだけで、該コッターカバーをコッターに簡単に嵌着することができる。 According to the above configuration, the cotter cover can be easily fitted to the cotter simply by press-fitting the cotter cover in the axial direction along the outer circumference of the rotating shaft.

本発明に係る回転部材の固定構造によれば、加工工数と部品点数を削減してコストダウンと省スペース化を実現しつつ、簡単な構成で回転部材を確実に位置決め固定することができるという効果が得られる。 According to the fixing structure of the rotating member according to the present invention, the effect is that the rotating member can be reliably positioned and fixed with a simple configuration while reducing the processing man-hours and the number of parts to realize cost reduction and space saving. Is obtained.

本発明に係る回転部材の固定構造を備える車両の変速機構の部分断面図である。It is a partial cross-sectional view of the speed change mechanism of the vehicle provided with the fixed structure of the rotating member which concerns on this invention. 図1のA部拡大詳細図である。It is an enlarged detailed view of part A of FIG. ウェーブスプリングの正面図である。It is a front view of a wave spring. コッターの斜視図である。It is a perspective view of a cotter. コッターカバーの斜視図である。It is a perspective view of a cotter cover. (a)〜(c)はコッターカバーのコッターへの嵌着をその工程順に示す部分断面図である。(A) to (c) are partial cross-sectional views showing the fitting of the cotter cover to the cotter in the order of the steps.

以下、添付図面を参照して本発明の実施の形態を説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図1は本発明に係る回転部材の固定構造を備える車両の変速機構の部分断面図、図2は図1のA部拡大詳細図、図3はウェーブスプリングの正面図、図4はコッターの斜視図、図5はコッターカバーの斜視図である。 FIG. 1 is a partial cross-sectional view of a speed change mechanism of a vehicle having a fixed structure of a rotating member according to the present invention, FIG. 2 is an enlarged detailed view of part A of FIG. 1, FIG. 3 is a front view of a wave spring, and FIG. 4 is a perspective view of a cotter. FIG. 5 is a perspective view of the cotter cover.

図1において、1,2は同心状に配置された中空軸状の内外二重の回転軸であり、これらの回転軸1,2は、不図示の軸受によって互いに相対回転可能に支持されている。そして、内軸である一方の回転軸1には、ギヤ1Aが一体に形成されており、外軸である他方の回転軸2にもギヤ2Aが一体に形成されている。 In FIG. 1, reference numerals 1 and 2 are hollow shaft-shaped inner and outer double rotating shafts arranged concentrically, and these rotating shafts 1 and 2 are rotatably supported by bearings (not shown). .. A gear 1A is integrally formed on one rotating shaft 1 which is an inner shaft, and a gear 2A is integrally formed on the other rotating shaft 2 which is an outer shaft.

外軸である回転軸2の自由端(ギヤ2Aから軸方向(図1の右方)にオーバーハングした部分)の外周には、スプライン2aが形成されており、このスプライン2aには、ギヤ3の内周に形成されたスプライン3aが嵌合している。したがって、ギヤ3は、回転軸2の外周にスプライン嵌合によって連結されており、回転軸2と共に一体に回転する。ここで、スプライン嵌合は、ギヤ3の回転軸2に沿う軸方向の移動を許容するため、ギヤ3は、本発明に係る軸方向位置決め固定構造によってその軸方向の移動が規制される。 A spline 2a is formed on the outer circumference of the free end of the rotating shaft 2 which is the outer shaft (the portion overhanging from the gear 2A in the axial direction (right side in FIG. 1)), and the gear 3 is formed on the spline 2a. A spline 3a formed on the inner circumference of the above is fitted. Therefore, the gear 3 is connected to the outer circumference of the rotating shaft 2 by spline fitting, and rotates integrally with the rotating shaft 2. Here, since the spline fitting allows the gear 3 to move in the axial direction along the rotating shaft 2, the gear 3 is restricted from moving in the axial direction by the axial positioning and fixing structure according to the present invention.

すなわち、図1に示すように、回転軸2の外周のギヤ3に隣接する箇所には、断面矩形状の嵌合溝2bが全周に亘ってリング状に形成されており、この嵌合溝2bには、2分割された2つのコッター4が嵌め込まれている。ここで、コッター4は、図4に示すように、所定の厚さを有する金属製の円形リングプレートを2分割して成る半円リング状の部材であって、その外周には、図2に詳細に示すように、傾斜部4aと水平部4bおよび段凹部4cが軸方向に沿って(図2の左方に向かって)順次形成されている。 That is, as shown in FIG. 1, a fitting groove 2b having a rectangular cross section is formed in a ring shape over the entire circumference at a position adjacent to the gear 3 on the outer circumference of the rotating shaft 2. Two cotters 4 divided into two are fitted in 2b. Here, as shown in FIG. 4, the cotter 4 is a semicircular ring-shaped member formed by dividing a metal circular ring plate having a predetermined thickness into two, and the outer periphery thereof is shown in FIG. As shown in detail, the inclined portion 4a, the horizontal portion 4b, and the step recess 4c are sequentially formed along the axial direction (toward the left side of FIG. 2).

上述のように2つのコッター4が回転軸2の嵌合溝2bに嵌め込まれて装着された状態では、図1に示すように、ギヤ3の軸方向一端面(図1の右端面)がコッター4に当接し、該ギヤ3の回転軸2上での位置決めがコッター4によってなされ、ギヤ3の軸方向への移動が阻止される。 As described above, in a state where the two cotters 4 are fitted and mounted in the fitting groove 2b of the rotating shaft 2, as shown in FIG. 1, one end surface in the axial direction of the gear 3 (the right end surface in FIG. 1) is a cotter. The cotter 4 abuts on the gear 3 and positions the gear 3 on the rotating shaft 2, so that the gear 3 is prevented from moving in the axial direction.

そして、コッター4が嵌め込まれている回転軸2の嵌合溝2b内においては、コッター4との間にリング状空間Sが形成されているが、このリング状空間Sには、ウェーブスプリング5が縮装されており、コッター4は、ウェーブスプリング5によって径方向外方に付勢されている。ここで、ウェーブスプリング5は、図3に示すように、バネ鋼などの金属によって一部が切り欠かれた六角リング状に成形されており、これが図1及び図2に示すように嵌合溝2b内のリング状空間Sに縮装されている状態では、該ウェーブスプリング5の5つの頂点5aは、コッター4の内周面に当接して該コッター4を径方向外方へと常時付勢している。なお、本実施の形態では、ウェーブスプリング5として六角リング状のものを用いたが、ウェーブスプリング5としては六角以外の多角リング状のものを使用することができる。 A ring-shaped space S is formed between the cotter 4 and the cotter 4 in the fitting groove 2b of the rotating shaft 2 into which the cotter 4 is fitted. In the ring-shaped space S, a wave spring 5 is provided. It is reduced, and the cotter 4 is radially outwardly urged by the wave spring 5. Here, as shown in FIG. 3, the wave spring 5 is formed into a hexagonal ring shape in which a part is cut out by a metal such as spring steel, and this is a fitting groove as shown in FIGS. 1 and 2. In the state of being compressed by the ring-shaped space S in 2b, the five apex 5a of the wave spring 5 abuts on the inner peripheral surface of the cotter 4 and constantly urges the cotter 4 outward in the radial direction. are doing. In the present embodiment, a hexagonal ring-shaped wave spring 5 is used, but as the wave spring 5, a polygonal ring-shaped wave spring other than the hexagonal can be used.

また、図1および図2に示すように、回転軸2の一端(自由端)外周のコッター4に隣接する部位には、図5に示すような円形リング状のコッターカバー6が圧入されており、このコッターカバー6は、後述のような手順を経てコッター4の外周部に嵌着されることによって該コッター4の外周を覆い、コッター4の遠心力による径方向外方への抜けを防ぐ。このように、コッターカバー6が回転軸2の外周に圧入され、これがコッター4の外周部に嵌着されている図1および図2に示す状態においては、コッター4は、ウェーブスプリング5によって径方向外方へと常時付勢されるため、コッター4とコッターカバー6の寸法誤差が吸収されてコッター4がコッターカバー6に押圧されて該コッターカバー6によって確実に保持される。 Further, as shown in FIGS. 1 and 2, a circular ring-shaped cotter cover 6 as shown in FIG. 5 is press-fitted into a portion adjacent to the cotter 4 on the outer periphery of one end (free end) of the rotating shaft 2. The cotter cover 6 covers the outer periphery of the cotter 4 by being fitted to the outer peripheral portion of the cotter 4 through a procedure as described later, and prevents the cotter 4 from coming off in the radial direction due to the centrifugal force. In the state shown in FIGS. 1 and 2 in which the cotter cover 6 is press-fitted to the outer periphery of the rotating shaft 2 and is fitted to the outer periphery of the cotter 4, the cotter 4 is radially driven by the wave spring 5. Since it is constantly urged outward, the dimensional error between the cotter 4 and the cotter cover 6 is absorbed, and the cotter 4 is pressed against the cotter cover 6 and is securely held by the cotter cover 6.

ここで、図2に詳細に示すように、コッターカバー6は、その外周部が横コの字状に折り曲げられている。すなわち、コッターカバー6は、円形リングプレート状の垂直な本体部6aと、該本体部6aの外周から軸方向に沿って直角に折り曲げられた円筒状の水平部6bと、該水平部6bの自由端から径方向内方(図2の下方)に向かって直角に折り曲げられた係合突起6cとで構成されている。 Here, as shown in detail in FIG. 2, the outer peripheral portion of the cotter cover 6 is bent in a horizontal U shape. That is, the cotter cover 6 is free of a circular ring plate-shaped vertical main body 6a, a cylindrical horizontal portion 6b bent at a right angle along the axial direction from the outer circumference of the main body 6a, and the horizontal portion 6b. It is composed of an engaging protrusion 6c bent at a right angle from the end toward the inside in the radial direction (lower part of FIG. 2).

次に、コッターカバー6を回転軸2の外周に圧入してこれをコッター4の外周部に嵌着する手順を図6(a)〜(c)に基づいて以下に説明する。 Next, a procedure of press-fitting the cotter cover 6 onto the outer periphery of the rotating shaft 2 and fitting the cotter cover 6 onto the outer peripheral portion of the cotter 4 will be described below with reference to FIGS. 6A to 6C.

すなわち、図6(a)〜(c)はコッターカバー6のコッター4への嵌着をその工程順に示す部分断面図であり、図6(a)に示すように、コッターカバー6を、その係合突起6cをコッター4の斜面部4aに当接させてコッター4に向けて図6(a)の左方へと押し込んで回転軸2の外周に圧入すると、コッター2は、楔作用によってウェーブスプリング5の付勢力に抗して径方向内方(図6(a)の下方)へと移動し、コッターカバー6の回転軸2の外周への圧入を許容する。 That is, FIGS. 6 (a) to 6 (c) are partial cross-sectional views showing the fitting of the cotter cover 6 to the cotter 4 in the order of the steps, and as shown in FIG. 6 (a), the cotter cover 6 is engaged. When the joint protrusion 6c is brought into contact with the slope portion 4a of the cotter 4 and pushed toward the cotter 4 to the left in FIG. 6A and press-fitted into the outer periphery of the rotating shaft 2, the cotter 2 is subjected to a wave spring by a wedge action. It moves inward in the radial direction (below FIG. 6A) against the urging force of 5, and allows the cotter cover 6 to be press-fitted to the outer periphery of the rotating shaft 2.

すると、コッターカバー6の係合突起6cは、図6(b)に示すように、やがてコッター4の水平部4bに係合し、この時点で、コッター4は、ウェーブスプリング5の付勢力に抗してさらに径方向内方(図6(b)の下方)へと移動して該ウェーブスプリング5を最圧縮状態とする。 Then, as shown in FIG. 6B, the engaging protrusion 6c of the cotter cover 6 eventually engages with the horizontal portion 4b of the cotter 4, and at this point, the cotter 4 resists the urging force of the wave spring 5. Then, the wave spring 5 is further moved inward in the radial direction (below FIG. 6B) to bring the wave spring 5 into the maximum compressed state.

その後、コッターカバー6を図6(b)の左方へと押圧してこれの圧入を進めると、図6(c)に示すように、該コッターカバー6の係合突起6cがコッター4の水平部4bを越えた時点で、コッター4がウェーブスプリング5の付勢力によって径方向外方(図6(c)の上方)へと移動し、その水平部4bがコッターカバー6の水平部6bに当接するとともに、コッターカバー6の係合突起6cがコッター4の段凹部4cに係合し、該コッターカバー6がコッター4の外周部に嵌着される。そして、このようにコッターカバー6がコッター4の外周部に嵌着されると、コッター4は、コッターカバー6によって覆われ、その径方向外方への抜けがコッターカバー6によって確実に防がれる。 After that, when the cotter cover 6 is pressed to the left side of FIG. 6 (b) to advance the press-fitting thereof, as shown in FIG. 6 (c), the engaging protrusion 6c of the cotter cover 6 is horizontal to the cotter 4. When the portion 4b is exceeded, the cotter 4 moves radially outward (above FIG. 6C) due to the urging force of the wave spring 5, and the horizontal portion 4b hits the horizontal portion 6b of the cotter cover 6. At the same time, the engaging protrusion 6c of the cotter cover 6 engages with the stepped recess 4c of the cotter 4, and the cotter cover 6 is fitted to the outer peripheral portion of the cotter 4. When the cotter cover 6 is fitted to the outer peripheral portion of the cotter 4 in this way, the cotter 4 is covered by the cotter cover 6, and the cotter cover 6 reliably prevents the cotter cover 6 from coming off in the radial direction. ..

以上のように、本実施の形態においては、コッターカバー6を保持するために従来必要であったセットリングが不要となるため、部品点数が削減されるとともに、回転軸2に対してはコッター4を嵌め込むための1つの嵌合溝2bを形成すればよいため、加工工数が削減され、コストダウンと省スペース化が図られる。そして、ギヤ3の回転軸2上への位置決めがコッター4によって確実になされ、ギヤ3のスラスト力がコッター4によって受けられるとともに、コッター4の遠心力による径方向外方への抜けがコッターカバー6によって確実に防がれる。 As described above, in the present embodiment, since the set ring conventionally required for holding the cotter cover 6 is not required, the number of parts is reduced and the cotter 4 is used for the rotating shaft 2. Since it is sufficient to form one fitting groove 2b for fitting the above, the processing man-hours can be reduced, and cost reduction and space saving can be achieved. Then, the cotter 4 ensures that the gear 3 is positioned on the rotating shaft 2, the thrust force of the gear 3 is received by the cotter 4, and the cotter cover 6 is pulled out in the radial direction due to the centrifugal force of the cotter 4. Is definitely prevented.

また、本実施の形態においては、コッターカバー6を回転軸2の外周に沿って軸方向に圧入するだけで、該コッターカバー6をコッター4に簡単に嵌着することができる。 Further, in the present embodiment, the cotter cover 6 can be easily fitted to the cotter 4 only by press-fitting the cotter cover 6 in the axial direction along the outer circumference of the rotating shaft 2.

なお、以上は本発明を車両の変速機構におけるギヤの回転軸への位置決め固定構造に対して適用した形態について説明したが、本発明は、車両の変速機構以外の任意の装置における回転部材の回転軸への位置決め固定構造に対しても同様に適用可能である。 Although the present invention has been described above in which the present invention is applied to the positioning and fixing structure of the gear on the rotating shaft of the speed change mechanism of the vehicle, the present invention describes the rotation of the rotating member in any device other than the speed change mechanism of the vehicle. The same applies to the positioning and fixing structure on the shaft.

その他、本発明は、以上説明した実施の形態に適用が限定されるものではなく、特許請求の範囲および明細書と図面に記載された技術的思想の範囲内で種々の変形が可能である。 In addition, the present invention is not limited to the embodiments described above, and various modifications can be made within the scope of claims and the technical ideas described in the specification and drawings.

1,2 回転軸
2a 回転軸のスプライン
2b 回転軸の嵌合溝
3 ギヤ(回転部材)
3a ギヤのスプライン
4 コッター
4a コッターの傾斜部
4b コッターの水平部
4c コッターの段凹部
5 ウェーブスプリング
6 コッターカバー
6a コッターカバーの本体部
6b コッターカバーの水平部
6c コッターカバーの係合突起
S リング状空間
1,2 Rotating shaft 2a Spline of rotating shaft 2b Fitting groove of rotating shaft 3 Gear (rotating member)
3a Gear spline 4 Cotter 4a Cotter tilt 4b Cotter horizontal 4c Cotter step recess 5 Wave spring 6 Cotter cover 6a Cotter cover body 6b Cotter cover horizontal 6c Cotter cover engagement protrusion S-ring space

Claims (3)

回転軸にスプライン嵌合する回転部材の固定構造であって、
前記回転軸の外周に嵌合溝を全周に亘って形成し、
円形リングプレートを2分割して成る半円リング状の2つのコッターを前記嵌合溝に嵌合して該コッターに前記回転部材の軸方向一端を当接させるとともに、
前記嵌合溝内において前記コッターとの間に形成されるリング状空間にウェーブスプリングを縮装し、
前記コッターの外周を覆うコッターカバーを前記回転軸に圧入して構成されることを特徴とする回転部材の固定構造。
It is a fixed structure of a rotating member that splines fits on the rotating shaft.
A fitting groove is formed on the outer circumference of the rotating shaft over the entire circumference.
Two semi-circular ring-shaped cotters formed by dividing a circular ring plate into two are fitted into the fitting groove so that one end of the rotating member in the axial direction is brought into contact with the cotter.
A wave spring is compressed in the ring-shaped space formed between the cotter and the fitting groove.
A fixed structure of a rotating member, characterized in that a cotter cover covering the outer periphery of the cotter is press-fitted into the rotating shaft.
前記ウェーブスプリングは、一部が切り欠かれた多角リング状に成形され、前記コッターを径方向外方へと付勢することを特徴とする請求項1に記載の回転部材の固定構造。 The fixing structure for a rotating member according to claim 1, wherein the wave spring is formed into a polygonal ring shape in which a part is cut out, and the cotter is urged outward in the radial direction. 前記コッターの外周に傾斜部と水平部および段凹部を軸方向に沿って形成し、
前記コッターカバーを、円形リングプレート状の垂直な本体部と、該本体部の外周から軸方向に沿って直角に折り曲げられた水平部と、該水平部の自由端から径方向内方に向かって直角に折り曲げられた係合突起とで構成し、
前記コッターカバーを前記回転軸の外周に沿って軸方向に圧入することによって、該コッターカバーの本体部と水平部を前記コッターの軸方向一端面と水平部にそれぞれ当接させるとともに、同コッターカバーの係合突起を前記コッターの段凹部に係合させて当該コッターカバーを前記コッターに嵌着したことを特徴とする請求項1または2に記載の回転部材の固定構造。
An inclined portion, a horizontal portion, and a stepped recess are formed on the outer circumference of the cotter along the axial direction.
The cotter cover is provided with a circular ring plate-shaped vertical main body, a horizontal portion bent at a right angle along the axial direction from the outer circumference of the main body, and a radial inward direction from the free end of the horizontal portion. Consists of engaging protrusions bent at right angles,
By press-fitting the cotter cover in the axial direction along the outer circumference of the rotating shaft, the main body portion and the horizontal portion of the cotter cover are brought into contact with the axial one end surface and the horizontal portion of the cotter, respectively, and the cotter cover is provided. The fixing structure for a rotating member according to claim 1 or 2, wherein the engaging protrusion of the cotter is engaged with a stepped recess of the cotter to fit the cotter cover to the cotter.
JP2019046256A 2019-03-13 2019-03-13 Fixing structure of rotary member Pending JP2020148257A (en)

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