JP5336311B2 - Member coupling structure, eccentric oscillating gear device, method of forming member coupling structure, and manufacturing method of eccentric oscillating gear device - Google Patents

Member coupling structure, eccentric oscillating gear device, method of forming member coupling structure, and manufacturing method of eccentric oscillating gear device Download PDF

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JP5336311B2
JP5336311B2 JP2009213318A JP2009213318A JP5336311B2 JP 5336311 B2 JP5336311 B2 JP 5336311B2 JP 2009213318 A JP2009213318 A JP 2009213318A JP 2009213318 A JP2009213318 A JP 2009213318A JP 5336311 B2 JP5336311 B2 JP 5336311B2
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康樹 橋田
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Nabtesco Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To secure the positioning accuracy and connection strength of two members while preventing the work of attaching both the members to each other from becoming complicated. <P>SOLUTION: The member connecting structure is for connecting a second flange 6 provided with first connection holes 6b to a shaft part 8 which is arranged on one side of the second flange 6 in the extending direction of the connection holes 6b and is provided with first screw holes 8a extending in the same direction with the first connection holes 6b and second connection holes 8b extending continuously from the first screw holes 8a to a second flange 6 side. The member connecting structure includes: bolts 10 having screws 10a with distal end side portions screwed into the first screw holes 8a; and positioning members 12 inserted in the first connection holes 6b and the second connection holes 8b to extend over them and having second screw holes 12a screwed to base end side of the screws 10a of the bolts 10. The positioning member 12 has such a wall thickness that the positioning member is expanded in diameter when the bolt 10 is fastened to the same. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、部材の結合構造、偏心揺動型歯車装置、部材の結合構造の形成方法及び偏心揺動型歯車装置の製造方法に関するものである。   The present invention relates to a member coupling structure, an eccentric oscillating gear device, a method for forming a member coupling structure, and a method for manufacturing an eccentric oscillating gear device.

従来、クランク軸の偏心部に取り付けられた外歯歯車を外筒の内面に設けられた内歯に噛み合わせながら揺動回転させることにより、クランク軸に入力される回転から減速した出力回転を得るようにした偏心揺動型歯車装置が知られている（例えば、特許文献１参照）。   Conventionally, by rotating and rotating an external gear attached to an eccentric portion of a crankshaft while meshing with an internal tooth provided on an inner surface of an outer cylinder, an output rotation decelerated from a rotation input to the crankshaft is obtained. Such an eccentric oscillating gear device is known (for example, see Patent Document 1).

この特許文献１に開示された偏心揺動型歯車装置では、外筒内に第１支持フランジと第２支持フランジとが外筒に対して同軸に回転可能に設けられている。第１支持フランジと第２支持フランジとは、外筒の軸方向に互いに離間して配置されており、これら両フランジ間に外歯歯車が配設されている。第１支持フランジには、第２支持フランジ側へ延びる内ピンが一体的に形成されており、当該内ピンは第２支持フランジと結合されている。そして、内ピンは、外歯歯車に軸方向に貫通するように形成された挿通穴に挿通されている。外歯歯車の回転力は、内ピンに付与され、それによって第１支持フランジ、第２支持フランジ及び内ピンは、一体的に外筒に対して相対回転する。   In the eccentric oscillating gear device disclosed in Patent Document 1, a first support flange and a second support flange are provided in an outer cylinder so as to be rotatable coaxially with respect to the outer cylinder. The first support flange and the second support flange are spaced apart from each other in the axial direction of the outer cylinder, and an external gear is disposed between the two flanges. An inner pin extending toward the second support flange is formed integrally with the first support flange, and the inner pin is coupled to the second support flange. The inner pin is inserted through an insertion hole formed so as to penetrate the external gear in the axial direction. The rotational force of the external gear is applied to the inner pin, whereby the first support flange, the second support flange and the inner pin integrally rotate relative to the outer cylinder.

内ピンには、その第２支持フランジ側の端面から第１フランジ側へ延びる穴と、その穴から連続してさらに第１フランジ側へ延びる螺子穴とが形成されている。また、第２支持フランジには、内ピンの穴に対応する位置に外筒の軸方向に延びる貫通穴が形成されている。第２支持フランジの貫通穴と内ピンの穴には、それら両方の穴に跨るように円筒状のノックピンが打ち込まれている。そして、連結ボルトが第２支持フランジの貫通穴に挿通されるとともにノックピンを貫通して内ピンの螺子穴に螺合されている。内ピンと第２支持フランジとは、この連結ボルトによって締結されている。   The inner pin is formed with a hole extending from the end surface on the second support flange side to the first flange side and a screw hole extending continuously from the hole to the first flange side. Further, a through hole extending in the axial direction of the outer cylinder is formed in the second support flange at a position corresponding to the hole of the inner pin. A cylindrical knock pin is driven into the through hole of the second support flange and the hole of the inner pin so as to straddle both the holes. The connecting bolt is inserted into the through hole of the second support flange and penetrates the knock pin and is screwed into the screw hole of the inner pin. The inner pin and the second support flange are fastened by this connecting bolt.

第２支持フランジの貫通穴と内ピンの穴に跨るように前記ノックピンが打ち込まれることにより、内ピンと第２支持フランジとの間の高精度な位置決めが可能となっているとともに、内ピンと第２支持フランジとの間に作用する外筒の軸回り方向への力に対する内ピンと第２支持フランジとの連結強度が向上されている。   The knock pin is driven so as to straddle the through hole of the second support flange and the hole of the inner pin, thereby enabling high-accuracy positioning between the inner pin and the second support flange. The connection strength between the inner pin and the second support flange against the force around the axis of the outer cylinder acting between the support flange and the support flange is improved.

特開２００６−４６５９６号公報JP 2006-46596 A

しかしながら、上記特許文献１に開示された歯車装置では、内ピンと第２支持フランジとを組み付ける際、第２支持フランジの貫通穴と内ピンの穴にノックピンを圧入すべく、それら両方の穴に跨るようにノックピンを打ち込む必要があるため、内ピンと第２支持フランジとの組み付け作業が煩雑になるという問題点がある。   However, in the gear device disclosed in Patent Document 1, when the inner pin and the second support flange are assembled, the knock pin is straddled over both the holes so as to press-fit the knock pin into the through hole of the second support flange and the hole of the inner pin. Thus, since it is necessary to drive the knock pin, there is a problem that the assembling work of the inner pin and the second support flange becomes complicated.

この発明は、上記のような課題を解決するためになされたものであり、その目的は、２つの部材同士の組み付け作業が煩雑になるのを防ぎつつ、それら両部材同士の位置決め精度及び連結強度を確保することである。   The present invention has been made to solve the above-described problems, and its purpose is to prevent the work of assembling the two members from becoming complicated, while positioning accuracy and connecting strength between the two members. Is to secure.

上記目的を達成するために、本発明による部材の結合構造は、特定方向に貫通する第１連結穴が設けられた第１部材と、前記第１連結穴が延びる方向において前記第１部材の一方側に配置され、前記第１連結穴と同方向に延びる第１螺子穴及びその第１螺子穴から前記第１部材側に連続して延びる第２連結穴が設けられた第２部材とを結合するための部材の結合構造であって、前記第１連結穴及び前記第２連結穴に挿通され、先端側の部分が前記第１螺子穴に螺合される螺子部を有するボルトと、前記第１連結穴と前記第２連結穴に跨るように挿嵌され、前記ボルトの螺子部の基端側の部分と螺合する第２螺子穴を有する位置決め部材とを備え、前記位置決め部材は、前記ボルトが締め込まれることによって拡径するような肉厚を有する。   In order to achieve the above object, the member coupling structure according to the present invention includes a first member provided with a first connection hole penetrating in a specific direction, and one of the first members in a direction in which the first connection hole extends. A first screw hole disposed on the side and extending in the same direction as the first connection hole and a second member provided with a second connection hole extending continuously from the first screw hole to the first member side are coupled. And a bolt having a screw portion inserted through the first connecting hole and the second connecting hole and having a distal end portion screwed into the first screw hole; A positioning member having a second screw hole which is inserted and fitted so as to straddle the one connection hole and the second connection hole and is screwed with a portion on the proximal end side of the screw part of the bolt. It has a thickness that expands when the bolt is tightened.

この部材の結合構造では、位置決め部材が第１連結穴と第２連結穴に跨るように挿嵌されているので、位置決め部材を両連結穴に挿入する際には大きな抵抗がなく、位置決め部材を両連結穴に容易に挿入することができる。このため、２つの部材を組み付ける際に両部材の穴にノックピンを圧入すべくノックピンを打ち込むような従来の構成と異なり、第１部材と第２部材の組み付け作業が煩雑になるのを防ぐことができる。そして、本構成では、位置決め部材を第１連結穴から第２連結穴に向かって両連結穴に跨るように挿嵌することができ、その後、第２部材の第１螺子穴と位置決め部材の第２螺子穴とにボルトを螺合させて締め込むことができる。ここで、本構成では、位置決め部材が、ボルトが締め込まれることによって拡径するような肉厚を有しているので、当該位置決め部材は、ボルトが締め込まれることによって拡径し、両連結穴の内面に押し付けられる。これにより、第２部材と位置決め部材と第１部材とは相互に位置決めされた状態で固定され、その結果、第１部材と第２部材との位置決め精度及び連結強度を確保することができる。従って、本構成では、第１部材と第２部材との組み付け作業が煩雑になるのを防ぎつつ、それら両部材同士の位置決め精度及び連結強度を確保することができる。また、本構成では、第１部材と第２部材を締結するボルトが位置決め部材に内挿されるので、第１部材と第２部材においてボルトによる締結箇所から離れた箇所に位置決め部材を別途設ける場合に比べて、位置決め部材を設けるために必要となる第１部材及び第２部材中のスペースを小さくすることができる。このため、第１部材及び第２部材の小型化を図ることが可能となる。さらに、本構成では、前記ボルトを緩めて取り外せば、位置決め部材を前記両連結穴から容易に抜き出すことができる。このため、メンテナンス時に第１部材と第２部材を容易に分離させることができ、さらにそれら両部材の再組み付けも容易に行える。   In this member coupling structure, since the positioning member is inserted so as to straddle the first connection hole and the second connection hole, there is no great resistance when the positioning member is inserted into both the connection holes. It can be easily inserted into both connecting holes. Therefore, unlike the conventional configuration in which the knock pin is driven to press-fit the knock pin into the holes of the two members when the two members are assembled, the assembly work of the first member and the second member can be prevented from becoming complicated. it can. In this configuration, the positioning member can be inserted so as to straddle both connection holes from the first connection hole toward the second connection hole, and then the first screw hole of the second member and the first of the positioning member A bolt can be screwed into the two screw holes and tightened. Here, in this structure, since the positioning member has such a thickness that the diameter is increased by tightening the bolt, the positioning member is expanded by tightening the bolt, Pressed against the inner surface of the hole. Thereby, the 2nd member, the positioning member, and the 1st member are fixed in the state where they were positioned mutually. As a result, the positioning accuracy and connection strength of the 1st member and the 2nd member can be secured. Therefore, in this configuration, it is possible to ensure the positioning accuracy and connection strength between the two members while preventing the assembly work of the first member and the second member from becoming complicated. Moreover, in this structure, since the bolt which fastens the 1st member and the 2nd member is inserted by the positioning member, when providing a positioning member separately in the location away from the fastening location by a bolt in the 1st member and the 2nd member In comparison, the space in the first member and the second member required for providing the positioning member can be reduced. For this reason, it is possible to reduce the size of the first member and the second member. Furthermore, in this configuration, if the bolt is loosened and removed, the positioning member can be easily extracted from both the connecting holes. For this reason, the first member and the second member can be easily separated at the time of maintenance, and further, these two members can be easily reassembled.

上記部材の結合構造において、前記第１連結穴の内面には、前記第２部材側の端部が径方向内側に突出するように段部が設けられており、前記位置決め部材には、前記段部に当接して、前記ボルトが締め込まれる際にそのボルトの頭部を受けるワッシャが設けられていることが好ましい。   In the member coupling structure, a step portion is provided on an inner surface of the first connection hole so that an end portion on the second member side protrudes radially inward, and the positioning member includes the step portion. It is preferable that a washer is provided in contact with the portion to receive the head of the bolt when the bolt is tightened.

位置決め部材にワッシャが設けられておらず、ボルトが締め込まれる際にそのボルトの頭部が第１連結穴内の段部に押し付けられるような構成では、第１連結穴内の段部がボルトの頭部から受ける押し付け力によって陥没する虞がある。これに対して、本構成によれば、ボルトを締め込む際にそのボルトの頭部をワッシャで受けることができるため、前記段部の陥没を防ぐことができる。   In the configuration in which the washer is not provided on the positioning member and the head of the bolt is pressed against the step in the first connecting hole when the bolt is tightened, the step in the first connecting hole is the head of the bolt. There is a risk of depression due to the pressing force received from the part. On the other hand, according to this structure, since the head part of the bolt can be received by the washer when the bolt is tightened, the stepped portion can be prevented from being depressed.

上記部材の結合構造において、前記第１連結穴と前記第２連結穴の内周面は、前記第１螺子穴側へ向かうにつれて縮径する連続したテーパー状の内周面を有し、前記位置決め部材は、前記テーパー状の内周面に嵌合するテーパー状の外周面を有していてもよい。   In the member coupling structure, the inner peripheral surfaces of the first connection hole and the second connection hole have a continuous tapered inner peripheral surface that decreases in diameter toward the first screw hole side, and the positioning The member may have a tapered outer peripheral surface that fits into the tapered inner peripheral surface.

このように構成すれば、ボルトを締め込むことによってボルトの頭部により位置決め部材が第１螺子穴側へ押圧され、それによって、位置決め部材のテーパー状の外周面が第１連結穴と第２連結穴のテーパー状の内周面に押し付けられる。この際、位置決め部材から第１部材に第２部材側へ押し付ける分力が作用するため、第１部材と第２部材の互いに接触する端面間に働く摩擦力を増加させることができる。その結果、例えば第１部材と第２部材が一体となって回転するような場合において、両部材間に作用する回転方向への力に対抗するための両部材の連結力をより強化することができる。   If comprised in this way, a positioning member will be pressed to the 1st screw hole side by the head of a bolt by fastening a volt | bolt, and, thereby, the taper-shaped outer peripheral surface of a locating member may be connected with a 1st connection hole and a 2nd connection hole. It is pressed against the tapered inner peripheral surface of the hole. At this time, since a component force that presses the first member from the positioning member toward the second member acts, the frictional force acting between the end surfaces of the first member and the second member that are in contact with each other can be increased. As a result, for example, in the case where the first member and the second member rotate together, it is possible to further strengthen the connecting force of both members to counter the force in the rotational direction acting between both members. it can.

また、本発明による偏心揺動型歯車装置は、上記いずれかの部材の結合構造が適用された偏心揺動型歯車装置であって、内面に複数の内歯が設けられた外筒と、前記外筒内において回転自在に設けられ、偏心部を有するクランク軸と、前記偏心部に取り付けられ、前記内歯に噛み合いながら前記偏心部の偏心回転に連動して揺動回転する外歯歯車とを備え、前記第１部材と前記第２部材は、前記ボルトにより互いに締結され、前記外歯歯車の回転力が伝達されることにより前記外筒に対してその軸回りに一体的に回転し、前記第１連結穴は、前記第１部材を前記外筒の軸方向に貫通し、前記第１螺子穴及び前記第２連結穴は、この第１連結穴と同方向に延びている。   An eccentric oscillating gear device according to the present invention is an eccentric oscillating gear device to which any one of the above-described member coupling structures is applied, and includes an outer cylinder having an inner surface provided with a plurality of internal teeth, A crankshaft that is rotatably provided in the outer cylinder and has an eccentric portion, and an external gear that is attached to the eccentric portion and that oscillates and rotates in conjunction with the eccentric rotation of the eccentric portion while meshing with the inner teeth. The first member and the second member are fastened to each other by the bolt, and rotate integrally around the axis of the outer cylinder by transmitting the rotational force of the external gear, The first connecting hole penetrates the first member in the axial direction of the outer cylinder, and the first screw hole and the second connecting hole extend in the same direction as the first connecting hole.

この偏心揺動型歯車装置では、上記部材の結合構造が適用されているため、外筒に対してその軸回りに一体的に回転する第１部材と第２部材との組み付け作業が煩雑になるのを防ぎつつ、それら両部材同士の軸回りにおける位置決め精度及び連結強度を確保することができる。また、この歯車装置では、上記部材の結合構造が適用されているため、第１部材及び第２部材の小型化を図ることが可能であるとともに、メンテナンス時に第１部材と第２部材を容易に分離させること及びそれら両部材を再組み付けすることを共に容易に行うことができる。   In this eccentric oscillating gear device, since the above-described member coupling structure is applied, the assembly work of the first member and the second member that rotate integrally around the axis of the outer cylinder becomes complicated. It is possible to ensure positioning accuracy and connection strength around the axis of the two members while preventing the above. Further, in this gear device, since the above-described member coupling structure is applied, the first member and the second member can be reduced in size, and the first member and the second member can be easily maintained during maintenance. Both separation and reassembly of both members can be easily performed.

上記偏心揺動型歯車装置において、当該偏心揺動型歯車装置は、前記外筒内において当該外筒の軸回りに回転可能に設けられた第１フランジを備え、前記外歯歯車は、前記外筒の軸方向に貫通する挿通穴を有し、前記第１部材は、前記外筒の軸方向において前記第１フランジから離間して配置された第２フランジであり、前記第２部材は、前記第１フランジから前記第２フランジへ向かって延び、前記挿通穴に挿通されたシャフト部であってもよい。   In the eccentric oscillating gear device, the eccentric oscillating gear device includes a first flange provided in the outer cylinder so as to be rotatable about the axis of the outer cylinder, and the external gear includes the outer gear. The first member is a second flange that is spaced apart from the first flange in the axial direction of the outer cylinder, and the second member includes the insertion hole that penetrates in the axial direction of the cylinder. It may be a shaft portion extending from the first flange toward the second flange and inserted through the insertion hole.

この構成では、外歯歯車の回転力がシャフト部に付与されて、シャフト部、第１フランジ及び第２フランジが一体的に外筒の軸回りに回転する。そして、外歯歯車の回転力がシャフト部に付与される際、シャフト部と第２フランジとの間には外筒の軸回りの回転方向への力が作用する。本構成では、このような回転方向へ作用する力に対抗するためのシャフト部と第２フランジとの連結強度をボルト及び位置決め部材によって確保することができる。   In this configuration, the rotational force of the external gear is applied to the shaft portion, and the shaft portion, the first flange, and the second flange rotate integrally around the axis of the outer cylinder. When the rotational force of the external gear is applied to the shaft portion, a force in the rotational direction around the axis of the outer cylinder acts between the shaft portion and the second flange. In this configuration, the connection strength between the shaft portion and the second flange to counter such a force acting in the rotation direction can be ensured by the bolt and the positioning member.

また、本発明による部材の結合構造の形成方法は、上記いずれかの部材の結合構造を形成するための方法であって、前記第１連結穴と前記第２連結穴とが重なるように前記第１部材と前記第２部材とを合わせる合わせ工程と、前記合わせ工程の後、前記位置決め部材を前記第１連結穴と前記第２連結穴とに跨るように前記第１連結穴から前記第２連結穴に向かって挿入する挿入工程と、前記挿入工程の後、前記ボルトを前記第２部材の前記第１螺子穴と前記位置決め部材の前記第２螺子穴とに螺合させて締め込むボルト締め工程とを備えている。   According to another aspect of the present invention, there is provided a method for forming a member connection structure, wherein the first connection hole and the second connection hole are overlapped with each other. An alignment step of combining one member and the second member, and after the alignment step, the second connection from the first connection hole so that the positioning member straddles the first connection hole and the second connection hole An insertion step of inserting toward the hole, and a bolt tightening step of tightening the bolt by screwing the bolt into the first screw hole of the second member and the second screw hole of the positioning member after the insertion step And.

この部材の結合構造の形成方法では、第１部材と第２部材とを合わせた状態で位置決め部材を第１連結穴から第２連結穴に向かって挿入し、その後、ボルトを第２部材の第１螺子穴と位置決め部材の第２螺子穴とに螺合させて締め込む。このため、位置決め部材を両連結穴に挿入する際には大きな抵抗を伴うことなく、位置決め部材を両連結穴に容易に挿入することができるとともに、両連結穴に挿入した位置決め部材により第１部材と第２部材とを相互に位置決めした上でボルトによる締結によって両部材を相互に固定することができる。   In this method of forming the coupling structure of members, the positioning member is inserted from the first coupling hole toward the second coupling hole in a state where the first member and the second member are combined, and then the bolt is inserted into the second member of the second member. The first screw hole and the second screw hole of the positioning member are screwed together and tightened. For this reason, when inserting a positioning member into both connecting holes, a positioning member can be easily inserted into both connecting holes without a large resistance, and the first member is inserted by the positioning member inserted into both connecting holes. The two members can be fixed to each other by fastening with bolts after positioning the second member and the second member.

また、本発明による偏心揺動型歯車装置の製造方法は、上記いずれかの偏心揺動型歯車装置を製造するための方法であって、前記第１連結穴と前記第２連結穴とが重なるように前記第１部材と前記第２部材とを合わせる合わせ工程と、前記合わせ工程の後、前記位置決め部材を前記第１連結穴と前記第２連結穴とに跨るように前記第１連結穴から前記第２連結穴に向かって挿入する挿入工程と、前記挿入工程の後、前記ボルトを前記第２部材の前記第１螺子穴と前記位置決め部材の前記第２螺子穴とに螺合させて締め込むボルト締め工程とを備えている。   The manufacturing method of the eccentric oscillating gear device according to the present invention is a method for manufacturing any one of the eccentric oscillating gear devices, wherein the first connecting hole and the second connecting hole overlap. After aligning the first member and the second member, and after the aligning step, the positioning member extends from the first connection hole so as to straddle the first connection hole and the second connection hole. An insertion step of inserting toward the second connection hole; and after the insertion step, the bolt is screwed into the first screw hole of the second member and the second screw hole of the positioning member and tightened. And a bolting process.

この偏心揺動型歯車装置の製造方法では、第１部材と第２部材とを合わせた状態で位置決め部材を第１連結穴から第２連結穴に向かって挿入し、その後、ボルトを第２部材の第１螺子穴と位置決め部材の第２螺子穴とに螺合させて締め込む。このため、位置決め部材を両連結穴に挿入する際には大きな抵抗を伴うことなく、位置決め部材を両連結穴に容易に挿入することができるとともに、両連結穴に挿入した位置決め部材により第１部材と第２部材とを相互に位置決めした上でボルトによる締結によって両部材を相互に固定することができる。   In the manufacturing method of the eccentric oscillating gear device, the positioning member is inserted from the first connection hole toward the second connection hole in a state where the first member and the second member are combined, and then the bolt is attached to the second member. The first screw hole and the second screw hole of the positioning member are screwed together and tightened. For this reason, when inserting a positioning member into both connecting holes, a positioning member can be easily inserted into both connecting holes without a large resistance, and the first member is inserted by the positioning member inserted into both connecting holes. The two members can be fixed to each other by fastening with bolts after positioning the second member and the second member.

以上説明したように、本発明によれば、第１部材と第２部材の組み付け作業が煩雑になるのを防ぎつつ、それら両部材同士の位置決め精度及び連結強度を確保することができる。   As described above, according to the present invention, it is possible to ensure the positioning accuracy and connection strength between the two members while preventing the assembly work of the first member and the second member from being complicated.

本発明の一実施形態による偏心揺動型歯車装置の軸方向に沿った断面図である。It is sectional drawing along the axial direction of the eccentric rocking | fluctuation type gear apparatus by one Embodiment of this invention. 本発明の一実施形態による偏心揺動型歯車装置の図１中のＩＩ−ＩＩ線に沿った断面図である。It is sectional drawing along the II-II line in FIG. 1 of the eccentric rocking | fluctuation type gear apparatus by one Embodiment of this invention. 図１に示した偏心揺動型歯車装置のシャフト部と第２フランジとの締結部を部分的に拡大して示す図である。It is a figure which expands and shows partially the fastening part of the shaft part and 2nd flange of the eccentric rocking | fluctuation type gear apparatus shown in FIG. 本発明の一実施形態の変形例による偏心揺動型歯車装置のシャフト部と第２フランジとの締結部を部分的に拡大して示す図である。It is a figure which expands and shows partially the fastening part of the shaft part and 2nd flange of the eccentric rocking | fluctuation type gear apparatus by the modification of one Embodiment of this invention.

以下、本発明の実施形態を図面を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

まず、図１〜図３を参照して、本発明の一実施形態による部材の結合構造が適用された偏心揺動型歯車装置の構成について説明する。   First, the configuration of an eccentric oscillating gear device to which a member coupling structure according to an embodiment of the present invention is applied will be described with reference to FIGS.

本実施形態による部材の結合構造が適用された偏心揺動型歯車装置（以下、単に歯車装置という）は、例えばロボットの旋回胴や腕関節等の旋回部または各種工作機械の旋回部に減速機として適用されるものであり、クランク軸１６の偏心部１６ａ，１６ｂに連動して外歯歯車２２，２４が内歯ピン３に噛み合いながら揺動回転することによりクランク軸１６に入力される回転から減速した出力回転が得られるように構成された、いわゆる外歯揺動型の歯車装置である。そして、本実施形態の歯車装置は、２つの相手側部材（図示せず）の間に接続され、それら２つの相手側部材のうち一方の相手側部材に前記出力回転を伝達してその一方の相手側部材を他方の相手側部材に対して相対回転させる。   An eccentric oscillating gear device (hereinafter simply referred to as a gear device) to which the member coupling structure according to the present embodiment is applied includes, for example, a speed reducer in a revolving part of a revolving body or arm joint of a robot or a revolving part of various machine tools. From the rotation input to the crankshaft 16 when the external gears 22 and 24 oscillate and rotate while meshing with the internal teeth pin 3 in conjunction with the eccentric portions 16a and 16b of the crankshaft 16. This is a so-called externally oscillating gear device configured to obtain a reduced output rotation. The gear device of the present embodiment is connected between two counterpart members (not shown), and transmits the output rotation to one of the two counterpart members and transmits the output rotation to one of the two counterpart members. The counterpart member is rotated relative to the other counterpart member.

具体的には、本実施形態の歯車装置は、図１に示すように、外筒２と、内歯ピン３と、第１フランジ４と、第２フランジ６と、シャフト部８と、ボルト１０と、位置決め部材１２と、ワッシャ１３と、第１主軸受１４ａと、第２主軸受１４ｂと、クランク軸１６と、第１クランク軸受１８ａと、第２クランク軸受１８ｂと、伝達歯車２０と、第１外歯歯車２２と、第２外歯歯車２４と、第１ころ軸受２６ａと、第２ころ軸受２６ｂとを備えている。   Specifically, as shown in FIG. 1, the gear device of the present embodiment includes an outer cylinder 2, an internal tooth pin 3, a first flange 4, a second flange 6, a shaft portion 8, and a bolt 10. Positioning member 12, washer 13, first main bearing 14a, second main bearing 14b, crankshaft 16, first crank bearing 18a, second crank bearing 18b, transmission gear 20, A first external gear 22, a second external gear 24, a first roller bearing 26a, and a second roller bearing 26b are provided.

外筒２は、歯車装置の外面を構成するケースとして機能するものであり、略円筒状に形成されている。この外筒２は、図略の前記他方の相手側部材に図略のボルトによって締結される。外筒２の内面には、多数のピン溝２ｂが形成されている。各ピン溝２ｂは、外筒２の軸方向に延びているとともに、外筒２の内面に周方向に等間隔で設けられている。   The outer cylinder 2 functions as a case constituting the outer surface of the gear device and is formed in a substantially cylindrical shape. The outer cylinder 2 is fastened to the other counterpart member (not shown) by a bolt (not shown). A large number of pin grooves 2 b are formed on the inner surface of the outer cylinder 2. Each pin groove 2 b extends in the axial direction of the outer cylinder 2, and is provided on the inner surface of the outer cylinder 2 at equal intervals in the circumferential direction.

内歯ピン３は、前記各ピン溝２ｂにそれぞれ嵌め込まれている。すなわち、複数の内歯ピン３が外筒２の内面に周方向に等間隔で設けられている。なお、この内歯ピン３は、本発明の内歯の概念に含まれるものである。   The internal tooth pin 3 is fitted in each pin groove 2b. That is, a plurality of internal teeth pins 3 are provided on the inner surface of the outer cylinder 2 at equal intervals in the circumferential direction. In addition, this internal tooth pin 3 is included in the concept of the internal tooth of this invention.

第１フランジ４は、図略の前記一方の相手側部材に図略のボルトによって締結される。この第１フランジ４は、略円板状に形成されており、外筒２内において第１主軸受１４ａに支持されることにより外筒２の軸回りに回転可能に設けられている。第１フランジ４は、外筒２の軸方向の一端部近傍に配置されている。また、第１フランジ４には、クランク軸取付穴４ａ（以下、単に取付穴４ａという）が設けられている。この取付穴４ａは、図示していないが、第１フランジ４に３つ設けられており、当該３つの取付穴４ａは、第１フランジ４の周方向に等間隔に配設されている。   The first flange 4 is fastened to the one counterpart member (not shown) by a bolt (not shown). The first flange 4 is formed in a substantially disc shape, and is rotatably provided around the axis of the outer cylinder 2 by being supported by the first main bearing 14 a in the outer cylinder 2. The first flange 4 is disposed in the vicinity of one end of the outer cylinder 2 in the axial direction. The first flange 4 is provided with a crankshaft mounting hole 4a (hereinafter simply referred to as a mounting hole 4a). Although not shown, the three mounting holes 4 a are provided in the first flange 4, and the three mounting holes 4 a are arranged at equal intervals in the circumferential direction of the first flange 4.

第２フランジ６は、略円板状に形成されており、外筒２内において第２主軸受１４ｂに支持されることにより外筒２の軸回りに回転可能に設けられている。この第２フランジ６は、本発明の第１部材の概念に含まれるものである。第２フランジ６は、外筒２の軸方向において第１フランジ４から離間して配置されており、外筒２の軸方向の他端部近傍に配置されている。第２フランジ６には、外筒２の軸方向に貫通するクランク軸取付穴６ａ（以下、単に取付穴６ａという）が設けられている。この取付穴６ａは、図示していないが、第２フランジ６に３つ設けられており、各取付穴６ａは、前記第１フランジ４の取付穴４ａと対応する位置に配設されている。   The second flange 6 is formed in a substantially disc shape, and is rotatably provided around the axis of the outer cylinder 2 by being supported by the second main bearing 14 b in the outer cylinder 2. The second flange 6 is included in the concept of the first member of the present invention. The second flange 6 is disposed away from the first flange 4 in the axial direction of the outer cylinder 2 and is disposed in the vicinity of the other end portion of the outer cylinder 2 in the axial direction. The second flange 6 is provided with a crankshaft mounting hole 6a (hereinafter simply referred to as a mounting hole 6a) penetrating in the axial direction of the outer cylinder 2. Although not shown, three mounting holes 6 a are provided in the second flange 6, and each mounting hole 6 a is disposed at a position corresponding to the mounting hole 4 a of the first flange 4.

そして、第２フランジ６には、外筒２の軸方向に貫通する第１連結穴６ｂが設けられている。この第１連結穴６ｂは、周方向において第２フランジ６の各取付穴６ａの間に位置する部位にそれぞれ設けられており、第２フランジ６に合計３つ設けられている。各第１連結穴６ｂの内面には、第１フランジ４側の端部が当該第１連結穴６ｂの径方向内側へ突出するように段部６ｃが設けられている。段部６ｃは、第１連結穴６ｂの周方向全体に亘って均一に突出している。すなわち、段部６ｃが設けられた部位における第１連結穴６ｂの内径は、第１連結穴６ｂのうち段部６ｃが設けられた部位以外の部位（第１フランジ４と反対側の部位）の内径よりも小さくなっている。また、段部６ｃの第１フランジ４と反対側の面は、外筒２の軸方向に対して垂直な平面となっている。   The second flange 6 is provided with a first connection hole 6 b that penetrates in the axial direction of the outer cylinder 2. The first connection holes 6b are provided at portions located between the mounting holes 6a of the second flange 6 in the circumferential direction, and a total of three first connection holes 6b are provided in the second flange 6. A step portion 6c is provided on the inner surface of each first connection hole 6b so that the end on the first flange 4 side protrudes radially inward of the first connection hole 6b. The step part 6c protrudes uniformly over the entire circumferential direction of the first connection hole 6b. That is, the inner diameter of the first connection hole 6b in the portion where the step portion 6c is provided is the portion of the first connection hole 6b other than the portion where the step portion 6c is provided (the portion opposite to the first flange 4). It is smaller than the inner diameter. Further, the surface of the step portion 6 c opposite to the first flange 4 is a plane perpendicular to the axial direction of the outer cylinder 2.

シャフト部８は、第１フランジ４と第２フランジ６とを繋ぐ部分であり、このシャフト部８は、本発明の第２部材の概念に含まれるものである。そして、本発明の一実施形態による部材の結合構造は、このシャフト部８と第２フランジ６とを結合するためのものである。   The shaft portion 8 is a portion that connects the first flange 4 and the second flange 6, and the shaft portion 8 is included in the concept of the second member of the present invention. The member connection structure according to the embodiment of the present invention is for connecting the shaft portion 8 and the second flange 6.

シャフト部８は、図２に示すように、外筒２内において外筒２の周方向に等間隔に３つ設けられている。各シャフト部８は、図１に示すように第１フランジ４に一体的に設けられており、外筒２の軸方向に沿って第１フランジ４から第２フランジ６へ向かって直線的に延びている。すなわち、各シャフト部８は、第２フランジ６に対して外筒２の軸方向（前記第１連結穴６ｂが延びる方向）における前記他端部側の位置に配置されている。そして、各シャフト部８は、外歯歯車２２，２４の後述する挿通穴２２ｃ，２４ｃに遊びを持った状態で挿通されている。   As shown in FIG. 2, three shaft portions 8 are provided in the outer tube 2 at equal intervals in the circumferential direction of the outer tube 2. As shown in FIG. 1, each shaft portion 8 is provided integrally with the first flange 4, and linearly extends from the first flange 4 toward the second flange 6 along the axial direction of the outer cylinder 2. ing. That is, each shaft portion 8 is arranged at a position on the other end side in the axial direction of the outer cylinder 2 with respect to the second flange 6 (the direction in which the first connection hole 6b extends). Each shaft portion 8 is inserted into an insertion hole 22c, 24c (described later) of the external gears 22, 24 with play.

また、各シャフト部８には、図３に示すように、第１螺子穴８ａと、第２連結穴８ｂとが設けられている。   Each shaft portion 8 is provided with a first screw hole 8a and a second connecting hole 8b as shown in FIG.

第１螺子穴８ａは、ボルト１０の後述する螺子部１０ａの先端側の部分と螺合する。第１螺子穴８ａは、シャフト部８の長手方向に垂直な断面において略中央部に位置するように配設されている。第１螺子穴８ａは、第２フランジ６の前記第１連結穴６ｂと同方向、すなわち外筒２の軸方向（シャフト部８の長手方向）に延びており、その内面に螺子溝８ｃが形成されている。   The first screw hole 8a is screwed with a portion on the tip side of a screw portion 10a described later of the bolt 10. The first screw hole 8 a is disposed so as to be positioned at a substantially central portion in a cross section perpendicular to the longitudinal direction of the shaft portion 8. The first screw hole 8a extends in the same direction as the first connection hole 6b of the second flange 6, that is, the axial direction of the outer cylinder 2 (longitudinal direction of the shaft portion 8), and a screw groove 8c is formed on the inner surface thereof. Has been.

第２連結穴８ｂは、第１螺子穴８ａと同軸に配置されており、外筒２の軸方向に沿って第１螺子穴８ａから第２フランジ６側に連続して延びている。この第２連結穴８ｂは、シャフト部８の先端面（第２フランジ６側の端面）において開口している。第２連結穴８ｂは、第１螺子穴８ａよりも大きな内径を有しており、この第２連結穴８ｂの内径は、第１連結穴６ｂの段部６ｃが設けられた部位の内径と等しくなっている。そして、各シャフト部８の第２連結穴８ｂは、外筒２の周方向において第２フランジ６の各第１連結穴６ｂに対応する位置に配設されている。   The second connection hole 8b is arranged coaxially with the first screw hole 8a and extends continuously from the first screw hole 8a to the second flange 6 side along the axial direction of the outer cylinder 2. The second connection hole 8b is open at the tip end surface of the shaft portion 8 (end surface on the second flange 6 side). The second connection hole 8b has a larger inner diameter than the first screw hole 8a, and the inner diameter of the second connection hole 8b is equal to the inner diameter of the portion where the step portion 6c of the first connection hole 6b is provided. It has become. The second connection holes 8 b of the shaft portions 8 are disposed at positions corresponding to the first connection holes 6 b of the second flange 6 in the circumferential direction of the outer cylinder 2.

そして、各シャフト部８と第２フランジ６とを結合するための本実施形態による部材の結合構造は、ボルト１０と、位置決め部材１２とを有している。   The member coupling structure according to the present embodiment for coupling each shaft portion 8 and the second flange 6 includes a bolt 10 and a positioning member 12.

ボルト１０は、シャフト部８と第２フランジ６とを締結するためのものであり、３つのシャフト部８を第２フランジ６に締結するために合計３つ設けられている。このボルト１０によりシャフト部８と第２フランジ６とが締結されることによって、シャフト部８と両フランジ４，６とが一体となる。各ボルト１０は、対応する第１連結穴６ｂ及び第２連結穴８ｂに挿通される。また、各ボルト１０は、螺子部１０ａと頭部１０ｂとを有する。螺子部１０ａは、シャフト部８の第１螺子穴８ａ及び位置決め部材１２の後述する第２螺子穴１２ａと螺合する。   The bolts 10 are for fastening the shaft portion 8 and the second flange 6, and a total of three bolts 10 are provided for fastening the three shaft portions 8 to the second flange 6. When the shaft portion 8 and the second flange 6 are fastened by the bolt 10, the shaft portion 8 and the flanges 4 and 6 are integrated. Each bolt 10 is inserted through the corresponding first connection hole 6b and second connection hole 8b. Each bolt 10 has a screw portion 10a and a head portion 10b. The screw portion 10 a is screwed into a first screw hole 8 a of the shaft portion 8 and a second screw hole 12 a described later of the positioning member 12.

位置決め部材１２は、第１連結穴６ｂと第２連結穴８ｂとに跨るようにそれら両連結穴６ｂ，８ｂに挿嵌されている。位置決め部材１２は、ボルト１０によりシャフト部８と第２フランジ６とが締結される前に、前記両連結穴６ｂ，８ｂに挿嵌されてシャフト部８と第２フランジ６の相互間の位置決めを行うものである。位置決め部材１２は、略円管状に形成されており、その軸方向に延びる第２螺子穴１２ａを有する。第２螺子穴１２ａは、ボルト１０の螺子部１０ａの基端側の部分と螺合する。すなわち、位置決め部材１２は、ボルト１０の締結力によってシャフト部８に保持される。第２螺子穴１２ａの内径は、第１螺子穴８ａの内径と等しくなっている。そして、位置決め部材１２は、その外周面が第１連結穴６ｂの内周面、詳細には段部６ｃが設けられた部位の内周面と、第２連結穴８ｂの内周面とに接触するとともに、それら両連結穴６ｂ，８ｂに大きな抵抗を伴わずに挿入できるような外径を有している。すなわち、両連結穴６ｂ，８ｂに対する位置決め部材１２の嵌め合いは、両連結穴６ｂ，８ｂに手の力で押して挿入できる程度の嵌め合いに設定されている。また、位置決め部材１２は、金属製であり、第１螺子穴８ａ及び第２螺子穴１２ａに螺合されたボルト１０が締め込まれることによって拡径するような肉厚を有する。   The positioning member 12 is inserted into both the connecting holes 6b and 8b so as to straddle the first connecting hole 6b and the second connecting hole 8b. The positioning member 12 is inserted into both the connecting holes 6b and 8b before the shaft portion 8 and the second flange 6 are fastened by the bolt 10 to position the shaft portion 8 and the second flange 6 between each other. Is what you do. The positioning member 12 is formed in a substantially circular tubular shape, and has a second screw hole 12a extending in the axial direction thereof. The second screw hole 12 a is screwed with a portion on the proximal end side of the screw portion 10 a of the bolt 10. That is, the positioning member 12 is held on the shaft portion 8 by the fastening force of the bolt 10. The inner diameter of the second screw hole 12a is equal to the inner diameter of the first screw hole 8a. The positioning member 12 has its outer peripheral surface in contact with the inner peripheral surface of the first connecting hole 6b, specifically, the inner peripheral surface of the portion where the step portion 6c is provided and the inner peripheral surface of the second connecting hole 8b. In addition, the outer diameter of the connecting holes 6b and 8b is such that they can be inserted without great resistance. That is, the fitting of the positioning member 12 with respect to both the connecting holes 6b and 8b is set to such an extent that it can be inserted into both the connecting holes 6b and 8b by hand force. Further, the positioning member 12 is made of metal and has such a thickness that the diameter is increased by tightening the bolt 10 screwed into the first screw hole 8a and the second screw hole 12a.

ワッシャ１３は、位置決め部材１２のうち第１連結穴６ｂ内に配置される端部に一体的に形成されている。このワッシャ１３は、位置決め部材１２の端部から径方向外側に突出する鍔状に形成されている。位置決め部材１２の軸方向におけるワッシャ１３の両面は、外筒２の軸方向に対して垂直な平面となっている。ワッシャ１３は、位置決め部材１２が第１連結穴６ｂから第２連結穴８ｂに向かって挿入される際に段部６ｃに当接する。そして、その状態で、ワッシャ１３は、第１螺子穴８ａ及び第２螺子穴１２ａに螺合されたボルト１０が締め込まれる際にそのボルト１０の頭部１０ｂを受ける。すなわち、このワッシャ１３は、ボルト１０の頭部１０ｂと段部６ｃとの間に介在し、ボルト１０が締め込まれる際に頭部１０ｂが段部６ｃに当たるのを防ぐ。   The washer 13 is formed integrally with an end portion of the positioning member 12 disposed in the first connection hole 6b. The washer 13 is formed in a bowl shape that protrudes radially outward from the end of the positioning member 12. Both surfaces of the washer 13 in the axial direction of the positioning member 12 are flat surfaces perpendicular to the axial direction of the outer cylinder 2. The washer 13 comes into contact with the step portion 6c when the positioning member 12 is inserted from the first connection hole 6b toward the second connection hole 8b. In this state, the washer 13 receives the head 10b of the bolt 10 when the bolt 10 screwed into the first screw hole 8a and the second screw hole 12a is tightened. That is, the washer 13 is interposed between the head portion 10b of the bolt 10 and the step portion 6c, and prevents the head portion 10b from hitting the step portion 6c when the bolt 10 is tightened.

クランク軸１６は、外筒２内に３つ設けられている（図２参照）。各クランク軸１６は、第１フランジ４の対応する取付穴４ａと第２フランジ６の対応する取付穴６ａにそれぞれ取り付けられている。これにより、３つのクランク軸１６は、外筒２内で周方向に等間隔に配置されている。   Three crankshafts 16 are provided in the outer cylinder 2 (see FIG. 2). Each crankshaft 16 is attached to a corresponding mounting hole 4 a of the first flange 4 and a corresponding mounting hole 6 a of the second flange 6. Accordingly, the three crankshafts 16 are arranged at equal intervals in the circumferential direction in the outer cylinder 2.

具体的には、各クランク軸１６の軸方向の一端部が、第１フランジ４の対応する取付穴４ａ内に第１クランク軸受１８ａを介して取り付けられている一方、各クランク軸１６の軸方向の他端部から所定長さだけ軸方向内側寄りの部位が、第２フランジ６の対応する取付穴６ａ内に第２クランク軸受１８ｂを介して取り付けられている。すなわち、各クランク軸１６は、クランク軸受１８ａ，１８ｂにより両フランジ４，６に対して回転可能に支持されている。   Specifically, one end of each crankshaft 16 in the axial direction is mounted in the corresponding mounting hole 4a of the first flange 4 via the first crank bearing 18a, while the axial direction of each crankshaft 16 is A portion closer to the inside in the axial direction by a predetermined length than the other end is attached to the corresponding attachment hole 6a of the second flange 6 via the second crank bearing 18b. That is, each crankshaft 16 is rotatably supported with respect to both flanges 4 and 6 by crank bearings 18a and 18b.

そして、各クランク軸１６は、第１偏心部１６ａと第２偏心部１６ｂとを有する。第１偏心部１６ａと第２偏心部１６ｂは、クランク軸１６のうち両クランク軸受１８ａ，１８ｂによってそれぞれ支持された部位の間の部位に設けられ、クランク軸１６の軸方向に並んで配置されている。第１偏心部１６ａと第２偏心部１６ｂは、それぞれクランク軸１６の軸心から所定の偏心量で偏心した円柱状に形成されているとともに、相互間に所定角度の位相差を有するように配置されている。また、クランク軸１６の前記他端部は、取付穴６ａを通って第２フランジ６から第１フランジ４と反対側に突出しており、その突出した部分に伝達歯車２０が設けられている。伝達歯車２０には、図略の入力軸に設けられた入力歯車が噛み合っており、図略のモータから入力軸に伝達された回転力が入力歯車及び伝達歯車２０を介して各クランク軸１６に伝達されるようになっている。   Each crankshaft 16 has a first eccentric portion 16a and a second eccentric portion 16b. The first eccentric portion 16a and the second eccentric portion 16b are provided in a portion between the portions of the crankshaft 16 that are respectively supported by the crank bearings 18a and 18b, and are arranged side by side in the axial direction of the crankshaft 16. Yes. The first eccentric portion 16a and the second eccentric portion 16b are each formed in a cylindrical shape that is eccentric from the axis of the crankshaft 16 by a predetermined amount of eccentricity, and are arranged so as to have a phase difference of a predetermined angle therebetween. Has been. The other end of the crankshaft 16 protrudes from the second flange 6 to the opposite side of the first flange 4 through the mounting hole 6a, and a transmission gear 20 is provided at the protruding portion. An input gear provided on an input shaft (not shown) meshes with the transmission gear 20, and the rotational force transmitted from the motor (not shown) to the input shaft is applied to each crankshaft 16 via the input gear and the transmission gear 20. It is to be transmitted.

第１外歯歯車２２と第２外歯歯車２４は、外筒２内において第１フランジ４と第２フランジ６との間の空間に外筒２の軸方向に並ぶように配設されている。   The first external gear 22 and the second external gear 24 are arranged in the space between the first flange 4 and the second flange 6 in the outer cylinder 2 so as to be aligned in the axial direction of the outer cylinder 2. .

第１外歯歯車２２には、図２に示すように周方向に等間隔に配置された３つの第１偏心部取付穴２２ａが設けられている。各第１偏心部取付穴２２ａには、第１ころ軸受２６ａを介して対応するクランク軸１６の第１偏心部１６ａが挿嵌されている。すなわち、第１外歯歯車２２は、各クランク軸１６の第１偏心部１６ａに第１ころ軸受２６ａを介して取り付けられている。第１外歯歯車２２は、外周部に前記内歯ピン３と噛み合う外歯２２ｂを有している。第１外歯歯車２２は、第１偏心部１６ａの偏心回転に連動してその外歯２２ｂにおいて内歯ピン３と噛み合いながら揺動回転する。そして、第１外歯歯車２２は、外筒２の軸方向に貫通する３つの挿通穴２２ｃを有している。各挿通穴２２ｃは、第１外歯歯車２２の周方向において各第１偏心部取付穴２２ａの間の部位にそれぞれ配設されている。各挿通穴２２ｃには、上記したように対応するシャフト部８が遊びを持った状態でそれぞれ挿通されている。   As shown in FIG. 2, the first external gear 22 is provided with three first eccentric portion mounting holes 22 a arranged at equal intervals in the circumferential direction. The first eccentric portion 16a of the corresponding crankshaft 16 is inserted and fitted into each first eccentric portion mounting hole 22a via the first roller bearing 26a. That is, the first external gear 22 is attached to the first eccentric portion 16a of each crankshaft 16 via the first roller bearing 26a. The first external gear 22 has external teeth 22b that mesh with the internal tooth pins 3 on the outer peripheral portion. The first external gear 22 swings and rotates while meshing with the internal tooth pin 3 at the external teeth 22b in conjunction with the eccentric rotation of the first eccentric portion 16a. The first external gear 22 has three insertion holes 22 c that penetrate in the axial direction of the outer cylinder 2. Each insertion hole 22c is disposed at a position between each first eccentric portion mounting hole 22a in the circumferential direction of the first external gear 22. As described above, the corresponding shaft portion 8 is inserted into each insertion hole 22c with play.

第２外歯歯車２４は、第１外歯歯車２２と同様の構造を有している。具体的には、第２外歯歯車２４は、各クランク軸１６の第２偏心部１６ｂに第２ころ軸受２６ｂを介して取り付けられている。そして、第２外歯歯車２４は、第２偏心部１６ｂの偏心回転に連動してその外歯２４ｂにおいて内歯ピン３と噛み合いながら揺動回転する。また、この第２外歯歯車２４には、外筒２の軸方向に貫通する３つの挿通穴２４ｃが設けられており、各挿通穴２４ｃに対応するシャフト部８が遊びを持った状態でそれぞれ挿通されている。   The second external gear 24 has the same structure as the first external gear 22. Specifically, the second external gear 24 is attached to the second eccentric portion 16b of each crankshaft 16 via the second roller bearing 26b. The second external gear 24 swings and rotates while meshing with the internal pin 3 at the external tooth 24b in conjunction with the eccentric rotation of the second eccentric portion 16b. The second external gear 24 is provided with three insertion holes 24c penetrating in the axial direction of the outer cylinder 2, and the shaft portions 8 corresponding to the insertion holes 24c have play respectively. It is inserted.

次に、本実施形態による歯車装置の動作について説明する。   Next, the operation of the gear device according to the present embodiment will be described.

まず、図略の駆動モータの駆動によって図略の入力軸が回転される。これにより、入力軸の歯車部から各伝達歯車２０を介して各クランク軸１６に回転力が入力される。   First, an input shaft (not shown) is rotated by driving a drive motor (not shown). As a result, a rotational force is input to each crankshaft 16 from the gear portion of the input shaft via each transmission gear 20.

そして、各クランク軸１６が回転するのに伴って各クランク軸１６の第１偏心部１６ａ及び第２偏心部１６ｂが偏心回転する。それにより、第１偏心部１６ａの偏心回転に連動して第１外歯歯車２２が内歯ピン３に噛み合いながら揺動回転するとともに、第２偏心部１６ｂの偏心回転に連動して第２外歯歯車２４が内歯ピン３に噛み合いながら揺動回転する。第１外歯歯車２２及び第２外歯歯車２４の回転力は、各シャフト部８に付与される。すなわち、前記回転力は、各シャフト部８、第１フランジ４及び第２フランジ６に伝達され、それによって、各シャフト部８、第１フランジ４及び第２フランジ６が外筒２に対して当該外筒２の軸回りに前記入力回転から減速された回転数で一体的に回転する。   As each crankshaft 16 rotates, the first eccentric portion 16a and the second eccentric portion 16b of each crankshaft 16 rotate eccentrically. As a result, the first external gear 22 swings and rotates while meshing with the internal pin 3 in conjunction with the eccentric rotation of the first eccentric portion 16a, and the second outer gear interlocks with the eccentric rotation of the second eccentric portion 16b. The tooth gear 24 swings and rotates while meshing with the internal tooth pin 3. The rotational force of the first external gear 22 and the second external gear 24 is applied to each shaft portion 8. That is, the rotational force is transmitted to each shaft portion 8, the first flange 4, and the second flange 6, so that each shaft portion 8, the first flange 4, and the second flange 6 are applied to the outer cylinder 2. Rotate integrally around the axis of the outer cylinder 2 at a speed reduced from the input rotation.

次に、本実施形態による歯車装置の製造方法のうちシャフト部８と第２フランジ６とを結合させる際のプロセス、すなわち本実施形態による部材の結合構造の形成方法のプロセスについて説明する。   Next, a process for coupling the shaft portion 8 and the second flange 6 in the manufacturing method of the gear device according to the present embodiment, that is, a process for forming a member coupling structure according to the present embodiment will be described.

シャフト部８と第２フランジ６とを結合させる際には、まず、外歯歯車２２，２４の各挿通穴２２ｃ，２４ｃに対応するシャフト部８を挿通するとともにそれらの外歯歯車２２，２４を第１フランジ４と第２フランジ６との間に挟み、その状態で、各第１連結穴６ｂと対応する第２連結穴８ｂとが重なるようにシャフト部８と第２フランジ６とを合わせる（合わせ工程）。   When the shaft portion 8 and the second flange 6 are coupled, first, the shaft portion 8 corresponding to the insertion holes 22c, 24c of the external gears 22, 24 is inserted and the external gears 22, 24 are connected. The first flange 4 and the second flange 6 are sandwiched between the first flange 4 and the second flange 6 so that the first connection holes 6b and the corresponding second connection holes 8b overlap with each other in this state ( Combining step).

次に、位置決め部材１２を各第１連結穴６ｂと対応する第２連結穴８ｂとに跨るように挿入する（挿入工程）。この際、位置決め部材１２は、大きな抵抗を伴うことなく両連結穴６ｂ，８ｂに挿入できる。なお、位置決め部材１２は、第１連結穴６ｂから第２連結穴８ｂに向かってワッシャ１３が段部６ｃに当たるまで挿入する。この位置決め部材１２の両連結穴６ｂ，８ｂへの挿嵌により、各シャフト部８と第２フランジ６との相互間の位置決めが行われる。   Next, the positioning member 12 is inserted so as to straddle the first connection holes 6b and the corresponding second connection holes 8b (insertion step). At this time, the positioning member 12 can be inserted into both the connecting holes 6b and 8b without a large resistance. The positioning member 12 is inserted from the first connecting hole 6b toward the second connecting hole 8b until the washer 13 hits the stepped portion 6c. The shaft member 8 and the second flange 6 are positioned relative to each other by inserting the positioning member 12 into the connecting holes 6b and 8b.

次に、ボルト１０を第１螺子穴８ａと第２螺子穴１２ａとに螺合させて締め込む（ボルト締め工程）。この際、ボルト１０を第２螺子穴１２ａから第１螺子穴８ａに向かってねじ込んでいき、頭部１０ｂがワッシャ１３に接触した状態で最後にボルト１０を締め込む。ここで、図３に示すように、ボルト１０の締め込みに応じて、ボルト１０の螺子部１０ａの螺子山１０ｃが第２螺子穴１２ａの螺子溝１２ｄに対してくさび作用を及ぼし、それによって螺子山１０ｃから位置決め部材１２に径方向外側へ向かう力が加えられる。この力によって位置決め部材１２は、わずかに拡径し、当該位置決め部材１２の外周面が第１連結穴６ｂの段部６ｃが設けられた部位の内周面と第２連結穴８ｂの内周面とに押し付けられる。このことによって、前記両内周面と位置決め部材１２の外周面との間に結合力が働く。その結果、シャフト部８と第２フランジ６との間にボルト１０による締結力に加えて位置決め部材１２による連結力が働く。このようにして、シャフト部８と第２フランジ６との結合が行われる。   Next, the bolt 10 is screwed into the first screw hole 8a and the second screw hole 12a and tightened (bolt tightening step). At this time, the bolt 10 is screwed from the second screw hole 12a toward the first screw hole 8a, and finally the bolt 10 is tightened with the head 10b in contact with the washer 13. Here, as shown in FIG. 3, in response to tightening of the bolt 10, the screw thread 10c of the screw portion 10a of the bolt 10 exerts a wedge action on the screw groove 12d of the second screw hole 12a. A force directed radially outward from the crest 10c is applied to the positioning member 12. By this force, the positioning member 12 is slightly expanded in diameter, and the outer peripheral surface of the positioning member 12 is the inner peripheral surface of the portion where the step portion 6c of the first connecting hole 6b is provided and the inner peripheral surface of the second connecting hole 8b. And pressed against. As a result, a binding force acts between the inner peripheral surfaces and the outer peripheral surface of the positioning member 12. As a result, a connecting force by the positioning member 12 acts between the shaft portion 8 and the second flange 6 in addition to a fastening force by the bolt 10. In this way, the shaft portion 8 and the second flange 6 are coupled.

以上説明したように、本実施形態では、位置決め部材１２が第１連結穴６ｂと第２連結穴８ｂに跨るように挿嵌されるので、位置決め部材１２を両連結穴６ｂ，８ｂに挿入する際には大きな抵抗がなく、位置決め部材１２を両連結穴６ｂ，８ｂに容易に挿入することができる。このため、一体的に回転する２つの部材を組み付ける際に両部材の穴にノックピンを圧入するために打ち込むような構成と異なり、シャフト部８と第２フランジ６の組み付け作業が煩雑になるのを防ぐことができる。そして、本実施形態では、位置決め部材１２を第１連結穴６ｂから第２連結穴８ｂに向かって両連結穴６ｂ，８ｂに跨るように挿嵌することができ、その後、シャフト部８の第１螺子穴８ａと位置決め部材１２の第２螺子穴１２ａとにボルト１０を螺合させて締め込むことができる。ここで、本実施形態では、位置決め部材１２が、ボルト１０が締め込まれることによって拡径するような肉厚を有しているので、当該位置決め部材１２は、ボルト１０が締め込まれることによって拡径し、その外面が両連結穴６ｂ，８ｂの内面に押し付けられる。これにより、シャフト部８と位置決め部材１２と第２フランジ６とは相互に位置決めされた状態で固定され、その結果、シャフト部８と第２フランジ６との位置決め精度及び連結強度を確保することができる。従って、本実施形態では、歯車装置において、一体的に回転するシャフト部８と第２フランジ６との組み付け作業が煩雑になるのを防ぎつつ、それらシャフト部８と第２フランジ６との位置決め精度及び連結強度を確保することができる。   As described above, in this embodiment, since the positioning member 12 is inserted so as to straddle the first connecting hole 6b and the second connecting hole 8b, when the positioning member 12 is inserted into both the connecting holes 6b and 8b. There is no great resistance, and the positioning member 12 can be easily inserted into both the connecting holes 6b and 8b. For this reason, when assembling two integrally rotating members, the assembly work of the shaft portion 8 and the second flange 6 is complicated, unlike a configuration in which a knock pin is pressed into the holes of both members. Can be prevented. And in this embodiment, the positioning member 12 can be inserted and fitted so that it may straddle both connection holes 6b and 8b toward the 2nd connection hole 8b from the 1st connection hole 6b, and the 1st of the shaft part 8 is after that. The bolt 10 can be screwed into the screw hole 8a and the second screw hole 12a of the positioning member 12 and tightened. Here, in this embodiment, since the positioning member 12 has such a thickness that the diameter is increased by tightening the bolt 10, the positioning member 12 is expanded by tightening the bolt 10. The outer surface is pressed against the inner surfaces of both the connecting holes 6b and 8b. Thereby, the shaft part 8, the positioning member 12, and the 2nd flange 6 are fixed in the state positioned mutually, As a result, the positioning precision and connection strength of the shaft part 8 and the 2nd flange 6 can be ensured. it can. Therefore, in this embodiment, in the gear device, the positioning accuracy between the shaft portion 8 and the second flange 6 is prevented while preventing the assembly work of the shaft portion 8 and the second flange 6 that rotate integrally with each other from being complicated. And connection strength can be secured.

また、本実施形態では、シャフト部８と第２フランジ６を締結するボルト１０が位置決め部材１２に内挿されるので、シャフト部８と第２フランジ６においてボルト１０による締結箇所から離れた箇所に位置決め部材を別途設ける場合に比べて、位置決め部材１２を設けるために必要となるシャフト部８及び第２フランジ６中のスペースを小さくすることができる。このため、シャフト部８及び第２フランジ６の小型化を図ることが可能となる。   Moreover, in this embodiment, since the bolt 10 which fastens the shaft part 8 and the 2nd flange 6 is inserted in the positioning member 12, it positions in the location away from the fastening location by the bolt 10 in the shaft part 8 and the 2nd flange 6. Compared with the case where a member is provided separately, the space in the shaft part 8 and the 2nd flange 6 required in order to provide the positioning member 12 can be made small. For this reason, it is possible to reduce the size of the shaft portion 8 and the second flange 6.

さらに、本実施形態では、歯車装置のメンテナンス時にボルト１０を緩めて取り外せば、位置決め部材１２を前記両連結穴６ｂ，８ｂから容易に抜き出すことができる。このため、メンテナンス時にシャフト部８と第２フランジ６とを容易に分離させることができ、さらにそれらシャフト部８と第２フランジ６との再組み付けも容易に行える。   Furthermore, in this embodiment, if the bolt 10 is loosened and removed at the time of maintenance of the gear device, the positioning member 12 can be easily extracted from both the connecting holes 6b and 8b. For this reason, the shaft portion 8 and the second flange 6 can be easily separated during maintenance, and the shaft portion 8 and the second flange 6 can be easily reassembled.

また、本実施形態では、位置決め部材１２に、段部６ｃに当接し、ボルト１０が締め込まれる際にそのボルト１０の頭部１０ｂを受けるワッシャ１３が設けられているため、ボルト１０の締め込み時に段部６ｃがボルト１０の頭部１０ｂから受ける押し付け力によって陥没するのを防ぐことができる。   In the present embodiment, the positioning member 12 is provided with a washer 13 that contacts the stepped portion 6c and receives the head 10b of the bolt 10 when the bolt 10 is tightened. It is possible to prevent the stepped portion 6c from being depressed due to the pressing force received from the head 10b of the bolt 10 sometimes.

また、本実施形態では、外歯歯車２２，２４の回転力がシャフト部８に付与されて、シャフト部８、第１フランジ４及び第２フランジ６が一体的に外筒２の軸回りに回転する。そして、外歯歯車２２，２４の回転力がシャフト部８に付与される際、シャフト部８と第２フランジ６との間には外筒２の軸回りの回転方向への応力が作用する。本実施形態では、このような回転方向への応力に対抗するためのシャフト部８と第２フランジ６との連結強度を位置決め部材１２によって確保することができる。   In the present embodiment, the rotational force of the external gears 22 and 24 is applied to the shaft portion 8, and the shaft portion 8, the first flange 4, and the second flange 6 rotate integrally around the axis of the outer cylinder 2. To do. When the rotational force of the external gears 22 and 24 is applied to the shaft portion 8, stress in the rotational direction around the axis of the outer cylinder 2 acts between the shaft portion 8 and the second flange 6. In the present embodiment, the positioning member 12 can ensure the connection strength between the shaft portion 8 and the second flange 6 to counter such stress in the rotational direction.

なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれる。   The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

例えば、位置決め部材１２に設けた前記ワッシャ１３は省略してもよい。あるいは、位置決め部材１２は、鍔を具備せず、外径が一様な円筒状の部材とするとともに、当該位置決め部材とは別部材のワッシャを設けてもよい。   For example, the washer 13 provided on the positioning member 12 may be omitted. Alternatively, the positioning member 12 may be a cylindrical member having a uniform outer diameter without a flange, and a washer that is a separate member from the positioning member may be provided.

また、図４に示す本発明の一実施形態の変形例のように、第２フランジ６の第１連結穴６ｂとシャフト部８の第２連結穴８ｂの内周面は、第１螺子穴８ａ側へ向かうにつれて縮径する連続したテーパー状の内周面を有し、位置決め部材１２は、両連結穴６ｂ，８ｂのテーパー状の内周面に嵌合するテーパー状の外周面を有していてもよい。   Moreover, like the modification of one Embodiment of this invention shown in FIG. 4, the internal peripheral surface of the 1st connection hole 6b of the 2nd flange 6 and the 2nd connection hole 8b of the shaft part 8 is 1st screw hole 8a. The positioning member 12 has a tapered outer peripheral surface that fits into the tapered inner peripheral surfaces of both the connecting holes 6b and 8b. May be.

具体的には、この変形例では、第１連結穴６ｂは、第２フランジ６を軸方向に貫通しており、その第１連結穴６ｂの内面のうちシャフト８側の端部から反対側の端部へ所定長さの範囲がシャフト８側へ向かうにつれて縮径するテーパー状に形成されている。また、第２連結穴８ｂの内周面は、全体が第１螺子穴８ａ側へ向かうにつれて縮径するテーパー状に形成されている。そして、この変形例では、位置決め部材１２は、両連結穴６ｂ，８ｂのテーパー状の部分に跨るように第１連結穴６ｂから第２連結穴８ｂに向かって挿嵌され、その両連結穴６ｂ，８ｂのテーパー状の内周面にフィットするテーパー状の外周面を有する。すなわち、位置決め部材１２は、両連結穴６ｂ，８ｂのテーパー状の部分に嵌め込まれた状態で第１螺子穴８ａ側へ向かうにつれて外径が縮小する円錐台状の外形を有する。   Specifically, in this modification, the first connection hole 6b penetrates the second flange 6 in the axial direction, and the inner surface of the first connection hole 6b is on the opposite side from the end on the shaft 8 side. A range of a predetermined length toward the end is formed in a taper shape with a diameter decreasing toward the shaft 8 side. Further, the inner peripheral surface of the second connection hole 8b is formed in a taper shape whose diameter decreases as it goes toward the first screw hole 8a. In this modification, the positioning member 12 is inserted from the first connection hole 6b toward the second connection hole 8b so as to straddle the tapered portions of the connection holes 6b and 8b, and both the connection holes 6b. , 8b has a tapered outer peripheral surface that fits into the tapered inner peripheral surface. That is, the positioning member 12 has a frustoconical outer shape whose outer diameter decreases toward the first screw hole 8a in a state where the positioning member 12 is fitted into the tapered portions of both the connecting holes 6b and 8b.

この変形例の構成では、ボルト１０を締め込むことによってボルト１０の頭部１０ｂにより位置決め部材１２が第１螺子穴８ａ側へ押圧され、それによって、位置決め部材１２のテーパー状の外周面が両連結穴６ｂ，８ｂのテーパー状の内周面に押し付けられる。この際、位置決め部材１２から第２フランジ６にシャフト部８側へ押し付ける力が作用するため、第２フランジ６とシャフト部８の互いに接触する端面間に働く摩擦力を増加させることができる。その結果、第２フランジ６とシャフト部８が一体となって回転する際にそれら第２フランジ６とシャフト部８との間に作用する回転方向への力に対抗するための第２フランジ６とシャフト部８との連結力をより強化することができる。   In the configuration of this modification, when the bolt 10 is tightened, the positioning member 12 is pressed toward the first screw hole 8a by the head portion 10b of the bolt 10, whereby the tapered outer peripheral surface of the positioning member 12 is connected to both. It is pressed against the tapered inner peripheral surfaces of the holes 6b and 8b. At this time, the pressing force from the positioning member 12 to the second flange 6 acts on the shaft portion 8 side, so that the friction force acting between the end surfaces of the second flange 6 and the shaft portion 8 that are in contact with each other can be increased. As a result, when the second flange 6 and the shaft portion 8 rotate together, the second flange 6 for countering the force in the rotational direction that acts between the second flange 6 and the shaft portion 8. The connection force with the shaft portion 8 can be further strengthened.

また、本発明による部材の結合構造及びその形成方法は、上記したシャフト部８と第２フランジ６との結合部以外にも適用することが可能である。   Further, the member connecting structure and the method for forming the member according to the present invention can be applied to other than the connecting portion between the shaft portion 8 and the second flange 6 described above.

例えば、前記一方の相手側部材と第１フランジ４との結合部や、前記他方の相手側部材と外筒２との結合部等に本発明による部材の結合構造及びその形成方法を適用してもよい。   For example, the member coupling structure and the method for forming the same according to the present invention are applied to a coupling portion between the one counterpart member and the first flange 4, a coupling portion between the other counterpart member and the outer cylinder 2, and the like. Also good.

また、内歯歯車を備えるとともに、キャリアが外歯を有し、内歯歯車が揺動することによってその内歯と噛み合う外歯とともにキャリアが回転する、いわゆる内歯揺動型の偏心揺動型歯車装置に本発明による部材の結合構造及びその形成方法を適用してもよい。   Also, an eccentric oscillating type of so-called internal oscillating type in which an internal gear is provided, the carrier has external teeth, and the carrier rotates together with external teeth that mesh with the internal teeth by oscillating the internal gear. The member coupling structure and the method for forming the member according to the present invention may be applied to a gear device.

この内歯揺動型の歯車装置は、例えば特開２０００−６５１５８号公報に開示されている。すなわち、キャリアは、外筒の径方向内側に位置する部位を有するとともに外筒と同軸状に配置されている。外筒の径方向内側の位置において、キャリアの外周面には外歯が設けられている。そして、キャリアと外筒との間には、キャリアの外歯に噛み合う内歯を内周面に有する環状の歯車部材が配設されており、この歯車部材には、クランク軸の偏心部が嵌め込まれる貫通孔が形成されている。クランク軸は、入力軸から直接又はスパーギアを介して回転力を受けて回転する。クランク軸は、キャリアの周方向に複数設けられるとともに外筒に回転可能に支持されており、当該クランク軸の回転によって歯車部材が揺動するようになっている。これにより、歯車部材の内歯に噛み合う外歯を有するキャリアが回転する。このキャリアの回転に伴って、外筒に結合された第１アームに対して、キャリアに結合された第２アームが相対的に回転する。このような内歯揺動型の歯車装置において、外筒と一方の相手側部材である第１アームとの結合部や、キャリアと他方の相手側部材である第２アームとの結合部等に、本発明による部材の結合構造及びその形成方法を適用してもよい。   This internal gear swing type gear device is disclosed in, for example, Japanese Patent Laid-Open No. 2000-65158. That is, the carrier has a portion located on the radially inner side of the outer cylinder and is disposed coaxially with the outer cylinder. External teeth are provided on the outer peripheral surface of the carrier at a radially inner position of the outer cylinder. An annular gear member having inner teeth meshing with the outer teeth of the carrier is disposed between the carrier and the outer cylinder, and an eccentric portion of the crankshaft is fitted into the gear member. A through hole is formed. The crankshaft rotates by receiving a rotational force directly from the input shaft or via a spur gear. A plurality of crankshafts are provided in the circumferential direction of the carrier and are rotatably supported by the outer cylinder, and the gear member swings as the crankshaft rotates. Thereby, the carrier having the external teeth meshing with the internal teeth of the gear member rotates. As the carrier rotates, the second arm coupled to the carrier rotates relative to the first arm coupled to the outer cylinder. In such an internal tooth oscillating gear device, a coupling portion between the outer cylinder and the first arm that is one counterpart member, a coupling portion between the carrier and the second arm that is the other counterpart member, etc. The member coupling structure and the method for forming the same according to the present invention may be applied.

また、シャフト部８が第２フランジ６と一体的に形成されている一方、シャフト部８と第１フランジ４とが別体に形成されているような構成において、このシャフト部８と第１フランジ４との結合部に本発明の部材の結合構造及びその形成方法を適用してもよい。   Further, in a configuration in which the shaft portion 8 is formed integrally with the second flange 6 while the shaft portion 8 and the first flange 4 are formed separately, the shaft portion 8 and the first flange are formed. The connecting structure of the member of the present invention and the method for forming the connecting structure may be applied to the connecting portion to the connecting portion 4.

また、第１フランジ４と第２フランジ６との間に設けられる外歯歯車は、１枚もしくは３枚以上であってもよい。   Further, the number of external gears provided between the first flange 4 and the second flange 6 may be one or three or more.

２ 外筒
３ 内歯ピン（内歯）
４ 第１フランジ
６ 第２フランジ（第１部材）
６ｂ 第１連結穴
６ｃ 段部
８ シャフト部（第２部材）
８ａ 第１螺子穴
８ｂ 第２連結穴
１０ ボルト
１０ａ 螺子部
１０ｂ 頭部
１２ 位置決め部材
１２ａ 第２螺子穴
１３ ワッシャ
１６ クランク軸
１６ａ 第１偏心部（偏心部）
１６ｂ 第２偏心部（偏心部）
２２ 第１外歯歯車（外歯歯車）
２２ｃ 挿通穴
２４ 第２外歯歯車（外歯歯車）
２４ｃ 挿通穴 2 Outer cylinder 3 Internal tooth pin (internal tooth)
4 First flange 6 Second flange (first member)
6b 1st connection hole 6c Step part 8 Shaft part (2nd member)
8a First screw hole 8b Second connection hole 10 Bolt 10a Screw part 10b Head 12 Positioning member 12a Second screw hole 13 Washer 16 Crankshaft 16a First eccentric part (eccentric part)
16b 2nd eccentric part (eccentric part)
22 1st external gear (external gear)
22c Insertion hole 24 2nd external gear (external gear)
24c insertion hole

Claims (7)

特定方向に貫通する第１連結穴が設けられた第１部材と、前記第１連結穴が延びる方向において前記第１部材の一方側に配置され、前記第１連結穴と同方向に延びる第１螺子穴及びその第１螺子穴から前記第１部材側に連続して延びる第２連結穴が設けられた第２部材とを結合するための部材の結合構造であって、
前記第１連結穴及び前記第２連結穴に挿通され、先端側の部分が前記第１螺子穴に螺合される螺子部を有するボルトと、
前記第１連結穴と前記第２連結穴に跨るように挿嵌され、前記ボルトの螺子部の基端側の部分と螺合する第２螺子穴を有する位置決め部材とを備え、
前記位置決め部材は、前記ボルトが締め込まれることによって拡径するような肉厚を有する、部材の結合構造。 A first member provided with a first connection hole penetrating in a specific direction, and a first member disposed on one side of the first member in a direction in which the first connection hole extends and extending in the same direction as the first connection hole A member coupling structure for coupling a screw hole and a second member provided with a second connecting hole extending continuously from the first screw hole to the first member side,
A bolt having a screw portion that is inserted into the first connection hole and the second connection hole, and a portion on the tip side is screwed into the first screw hole;
A positioning member having a second screw hole, which is fitted so as to straddle the first connection hole and the second connection hole, and is screwed with a proximal end portion of the screw portion of the bolt;
The member positioning structure has a thickness such that the positioning member expands when the bolt is tightened. 前記第１連結穴の内面には、前記第２部材側の端部が径方向内側に突出するように段部が設けられており、
前記位置決め部材には、前記段部に当接して、前記ボルトが締め込まれる際にそのボルトの頭部を受けるワッシャが設けられている、請求項１に記載の部材の結合構造。 On the inner surface of the first connection hole, a step is provided so that the end on the second member side protrudes radially inward,
The member positioning structure according to claim 1, wherein the positioning member is provided with a washer that contacts the stepped portion and receives a head portion of the bolt when the bolt is tightened. 前記第１連結穴と前記第２連結穴の内周面は、前記第１螺子穴側へ向かうにつれて縮径する連続したテーパー状の内周面を有し、
前記位置決め部材は、前記テーパー状の内周面に嵌合するテーパー状の外周面を有する、請求項１に記載の部材の結合構造。 The inner peripheral surfaces of the first connection hole and the second connection hole have a continuous tapered inner peripheral surface that decreases in diameter toward the first screw hole side,
The member positioning structure according to claim 1, wherein the positioning member has a tapered outer peripheral surface that fits into the tapered inner peripheral surface. 請求項１〜３のいずれか１項に記載の部材の結合構造が適用された偏心揺動型歯車装置であって、
内面に複数の内歯が設けられた外筒と、
前記外筒内において回転自在に設けられ、偏心部を有するクランク軸と、
前記偏心部に取り付けられ、前記内歯に噛み合いながら前記偏心部の偏心回転に連動して揺動回転する外歯歯車とを備え、
前記第１部材と前記第２部材は、前記ボルトにより互いに締結され、前記外歯歯車の回転力が伝達されることにより前記外筒に対してその軸回りに一体的に回転し、
前記第１連結穴は、前記第１部材を前記外筒の軸方向に貫通し、前記第１螺子穴及び前記第２連結穴は、この第１連結穴と同方向に延びている、偏心揺動型歯車装置。 An eccentric oscillating gear device to which the member coupling structure according to any one of claims 1 to 3 is applied,
An outer cylinder having a plurality of inner teeth on the inner surface;
A crankshaft rotatably provided in the outer cylinder and having an eccentric portion;
An external gear that is attached to the eccentric portion and that rotates in conjunction with the eccentric rotation of the eccentric portion while meshing with the internal teeth,
The first member and the second member are fastened to each other by the bolt and rotate integrally around the axis of the outer cylinder by transmitting the rotational force of the external gear,
The first connecting hole penetrates the first member in the axial direction of the outer cylinder, and the first screw hole and the second connecting hole extend in the same direction as the first connecting hole. Dynamic gear device. 前記外筒内において当該外筒の軸回りに回転可能に設けられた第１フランジを備え、
前記外歯歯車は、前記外筒の軸方向に貫通する挿通穴を有し、
前記第１部材は、前記外筒の軸方向において前記第１フランジから離間して配置された第２フランジであり、
前記第２部材は、前記第１フランジから前記第２フランジへ向かって延び、前記挿通穴に挿通されたシャフト部である、請求項４に記載の偏心揺動型歯車装置。 A first flange provided rotatably around the axis of the outer cylinder in the outer cylinder;
The external gear has an insertion hole penetrating in the axial direction of the outer cylinder,
The first member is a second flange disposed away from the first flange in the axial direction of the outer cylinder,
The eccentric oscillating gear device according to claim 4, wherein the second member is a shaft portion that extends from the first flange toward the second flange and is inserted into the insertion hole. 請求項１に記載の部材の結合構造の形成方法であって、
前記第１連結穴と前記第２連結穴とが重なるように前記第１部材と前記第２部材とを合わせる合わせ工程と、
前記合わせ工程の後、前記位置決め部材を前記第１連結穴と前記第２連結穴とに跨るように前記第１連結穴から前記第２連結穴に向かって挿入する挿入工程と、
前記挿入工程の後、前記ボルトを前記第２部材の前記第１螺子穴と前記位置決め部材の前記第２螺子穴とに螺合させて締め込むボルト締め工程とを備えた、部材の結合構造の形成方法。 It is a formation method of the joint structure of the member according to claim 1,
A step of aligning the first member and the second member so that the first connection hole and the second connection hole overlap;
After the alignment step, an insertion step of inserting the positioning member from the first connection hole toward the second connection hole so as to straddle the first connection hole and the second connection hole;
A bolting step including a bolt tightening step of screwing the bolt into the first screw hole of the second member and the second screw hole of the positioning member after the inserting step; Forming method. 請求項２〜５のいずれか１項に記載の偏心揺動型歯車装置の製造方法であって、
前記第１連結穴と前記第２連結穴とが重なるように前記第１部材と前記第２部材とを合わせる合わせ工程と、
前記合わせ工程の後、前記位置決め部材を前記第１連結穴と前記第２連結穴とに跨るように前記第１連結穴から前記第２連結穴に向かって挿入する挿入工程と、
前記挿入工程の後、前記ボルトを前記第２部材の前記第１螺子穴と前記位置決め部材の前記第２螺子穴とに螺合させて締め込むボルト締め工程とを備えた、偏心揺動型歯車装置の製造方法。 It is a manufacturing method of the eccentric rocking | fluctuation type gear apparatus of any one of Claims 2-5,
A step of aligning the first member and the second member so that the first connection hole and the second connection hole overlap;
After the alignment step, an insertion step of inserting the positioning member from the first connection hole toward the second connection hole so as to straddle the first connection hole and the second connection hole;
An eccentric oscillating gear comprising a bolt tightening step of screwing the bolt into the first screw hole of the second member and the second screw hole of the positioning member after the inserting step. Device manufacturing method.
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