JP6771816B2 - Rotational force transmission device - Google Patents
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Description
本発明は、駆動回転部の伝達部と従動回転部の被伝達部により、設定トルクを上回る過大な負荷が加わることを適切に防ぎつつ回転力を伝達する回転力伝達装置に関する。 The present invention relates to a rotational force transmission device that transmits rotational force while appropriately preventing an excessive load exceeding a set torque from being applied by a transmission unit of a drive rotation unit and a transmitted unit of a driven rotation unit.
特開平１１−１９１２５０号公報には、スリップ板にフェルトが貼り付けられ、プーリーがスプリングにより前記フェルトに押さえつけられてカラーの周りを前記フェルトと摺動しながら回転するトルクリミッターが記載されている。 Japanese Unexamined Patent Publication No. 11-191250 describes a torque limiter in which felt is attached to a slip plate, a pulley is pressed against the felt by a spring, and the collar rotates while sliding with the felt.
この技術は、ある程度大きい半径位置においてフェルトとの摺動によりトルクを制限しつつ回転力を伝達するには適するが、比較的小さい半径の回転体同士の回転力伝達を効率良く行ないつつトルクを適切に制限するには適していない。 This technology is suitable for transmitting rotational force while limiting torque by sliding with the felt at a position with a large radius to some extent, but it is appropriate for torque while efficiently transmitting rotational force between rotating bodies with relatively small radii. Not suitable for limiting to.
本発明は、比較的小さい半径の伝達部と被伝達部における回転力伝達であっても、設定トルクを上回る過大な負荷が加わることを適切に防ぎつつ回転力を効率良く伝達することができる回転力伝達装置を提供することを目的とする。 INDUSTRIAL APPLICABILITY The present invention can efficiently transmit a rotational force while appropriately preventing an excessive load exceeding a set torque from being applied even when the rotational force is transmitted between a transmission portion having a relatively small radius and a transmitted portion. It is an object of the present invention to provide a force transmission device.
本発明の回転力伝達装置は、次のように表すことができる。 The rotational force transmission device of the present invention can be expressed as follows.
(1) 駆動回転部の伝達部と従動回転部の被伝達部により回転力を伝達する装置であって、
前記伝達部と被伝達部は軸線方向に相対し、前記伝達部と被伝達部の間には、軸線方向のまわりの回転力の伝達に伴い軸線方向に離隔しようとする向きの軸線方向力が発生し得、
前記伝達部と被伝達部は、所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で相対的に軸線方向に移動し得、
前記駆動回転部と従動回転部の一方又は両方には、軸線方向に互いに向かい合う向きの付勢力が加えられており、
設定トルク未満の負荷においては、前記軸線方向の付勢力により前記伝達部と被伝達部の間に所要の回転力が伝達され得る状態が維持され、
設定トルク以上の負荷が加わった場合は、前記付勢力に抗して前記伝達部と被伝達部が相対的に軸線方向に離隔する方向に移動することにより所要の回転力の伝達が中断され、負荷が設定トルク未満に戻ることにより、前記伝達部と被伝達部の間に所要の回転力が伝達され得る状態が回復することを特徴とする回転力伝達装置。
(1) A device that transmits rotational force by the transmission part of the drive rotation part and the transmitted part of the driven rotation part.
The transmitted portion and the transmitted portion face each other in the axial direction, and an axial force in a direction that tends to separate in the axial direction as the rotational force around the axial direction is transmitted between the transmitted portion and the transmitted portion. Can occur,
The transmitting portion and the transmitted portion may move relatively axially between a mutual position where the required rotational force can be transmitted and a mutual position where the required rotational force cannot be transmitted.
One or both of the drive rotating portion and the driven rotating portion are subjected to urging forces in directions facing each other in the axial direction.
When the load is less than the set torque, the state in which the required rotational force can be transmitted between the transmitting portion and the transmitted portion is maintained by the urging force in the axial direction.
When a load greater than or equal to the set torque is applied, the transmission of the required rotational force is interrupted by moving the transmitting portion and the transmitted portion in a direction relatively separated from each other in the axial direction against the urging force. A rotational force transmitting device, characterized in that when the load returns to less than a set torque, a state in which a required rotational force can be transmitted between the transmitting portion and the transmitted portion is restored.
駆動回転部の伝達部と従動回転部の被伝達部は、所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で相対的に軸線方向に移動し得る。 The transmitting part of the drive rotating part and the transmitted part of the driven rotating part can move relatively axially between the mutual position where the required rotational force can be transmitted and the mutual position where the required rotational force cannot be transmitted. ..
設定トルク未満の負荷においては、軸線方向に互いに向かい合う向きの付勢力により伝達部と被伝達部の間に所要の回転力が伝達され得る状態が維持される。 When the load is less than the set torque, a state in which the required rotational force can be transmitted between the transmitting portion and the transmitted portion is maintained by the urging force in the direction facing each other in the axial direction.
設定トルク以上の負荷が加わった場合は、付勢力に抗して伝達部と被伝達部が相対的に軸線方向に離隔する方向に移動することにより所要の回転力の伝達が中断され、負荷が設定トルク未満に戻ることにより、伝達部と被伝達部の間に所要の回転力が伝達され得る状態が回復する。 When a load greater than the set torque is applied, the transmission part and the transmitted part move in a direction that is relatively separated from each other in the axial direction against the urging force, so that the transmission of the required rotational force is interrupted and the load is applied. By returning to less than the set torque, the state in which the required rotational force can be transmitted between the transmitting portion and the transmitted portion is restored.
よって、比較的小さい半径の伝達部と被伝達部における回転力伝達であっても、設定トルクを上回る過大な負荷が加わることを適切に防ぎつつ回転力を効率良く伝達することができる。 Therefore, even when the rotational force is transmitted between the transmitting portion and the transmitted portion having a relatively small radius, the rotational force can be efficiently transmitted while appropriately preventing an excessive load exceeding the set torque from being applied.
(2) 伝達部及び被伝達部の双方における少なくとも回転軸線を中心とする所定半径方向幅の環状部分に、所定の中心角を周期として軸線方向の振幅を有する波形状部がそれぞれ設けられ、
設定トルク未満の負荷においては、上記軸線方向の付勢力により伝達部と被伝達部の軸線方向相互位置が所定の範囲内に維持されて両者の波形状部同士の噛み合いにより所要の回転力が伝達され得る状態が維持され、
設定トルク以上の負荷が加わった場合は、前記付勢力に抗して両者の波形状部同士が伝達部と被伝達部を所定の範囲よりも相対的に軸線方向に離隔させ、前記の噛み合いが解除され又は不十分となって所要の回転力の伝達が中断されるものである上記(1)記載の回転力伝達装置。
(2) A wave-shaped portion having an amplitude in the axial direction with a predetermined central angle as a period is provided in an annular portion having a predetermined radial width centered on at least the rotation axis in both the transmitting portion and the transmitted portion.
When the load is less than the set torque, the axial mutual position of the transmitting part and the transmitted part is maintained within a predetermined range by the urging force in the axial direction, and the required rotational force is transmitted by the meshing of the corrugated parts of both. The state that can be maintained is maintained
When a load greater than or equal to the set torque is applied, the wave-shaped portions of both sides separate the transmitting portion and the transmitted portion relative to the predetermined range in the axial direction against the urging force, and the above-mentioned meshing occurs. The rotational force transmission device according to (1) above, wherein the transmission of the required rotational force is interrupted due to being released or insufficient.
(3) 伝達部及び被伝達部の何れか一方に多数の凸部が設けられ、他方に多数の凸部又は凹部が設けられ、
設定トルク未満の負荷においては、上記軸線方向の付勢力により伝達部と被伝達部の軸線方向相互位置が所定の範囲内に維持されて両者の凸部同士又は凸部と凹部の噛み合いにより所要の回転力が伝達され得る状態が維持され、
設定トルク以上の負荷が加わった場合は、前記付勢力に抗して両者の凸部同士又は凸部と凹部が伝達部と被伝達部を所定の範囲よりも相対的に軸線方向に離隔させて前記の噛み合いが解除され又は不十分となって所要の回転力の伝達が中断されるものである上記(1)記載の回転力伝達装置。
(3) A large number of convex portions are provided on either one of the transmitting portion and the transmitted portion, and a large number of convex portions or concave portions are provided on the other.
When the load is less than the set torque, the axial mutual position of the transmitting part and the transmitted part is maintained within a predetermined range by the urging force in the axial direction, and it is required by the meshing of the convex parts of the two or the convex part and the concave part. The state in which the rotational force can be transmitted is maintained,
When a load greater than the set torque is applied, the convex parts of the two or the convex parts and the concave parts separate the transmitting part and the transmitted part relatively in the axial direction from the predetermined range against the urging force. The rotational force transmission device according to (1) above, wherein the engagement is released or insufficient and the transmission of the required rotational force is interrupted.
(4) 駆動回転部の伝達部と従動回転部の被伝達部が同軸状をなす上記(1)乃至(3)の何れか１項に記載の回転力伝達装置。 (4) The rotational force transmitting device according to any one of (1) to (3) above, wherein the transmitting portion of the driving rotating portion and the transmitted portion of the driven rotating portion are coaxial.
(5) 駆動回転部と従動回転部の何れか一方における回転部に、相対回転可能に他方の回転部が同軸状に外嵌し、伝達部と被伝達部の間に所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で駆動回転部と従動回転部が相対的に軸線方向に移動し得、駆動回転部と従動回転部の一方又は両方に対し、伝達部と被伝達部の間に所要の回転力が伝達され得るように軸線方向に互いに向かい合う向きの付勢力が加えられている上記(4)記載の回転力伝達装置。 (5) The other rotating part is coaxially fitted to the rotating part of either the driving rotating part or the driven rotating part so as to be relatively rotatable, and the required rotational force is transmitted between the transmitting part and the transmitted part. The drive rotating part and the driven rotating part can move relatively in the axial direction between the mutual position where the required rotational force cannot be transmitted and the mutual position where the required rotational force cannot be transmitted, and with respect to one or both of the driving rotating part and the driven rotating part. , The rotational force transmission device according to (4) above, wherein urging forces in directions facing each other in the axial direction are applied so that a required rotational force can be transmitted between the transmission unit and the transmission unit.
(6) 非回転軸体に対し、駆動回転部と従動回転部が回転可能に同軸状に外嵌し、伝達部と被伝達部の間に所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で駆動回転部と従動回転部が相対的に軸線方向に移動し得、駆動回転部と従動回転部の一方又は両方に対し、伝達部と被伝達部の間に所要の回転力が伝達され得るように軸線方向に互いに向かい合う向きの付勢力が加えられている上記(4)記載の回転力伝達装置。 (6) The drive rotating part and the driven rotating part are rotatably and coaxially fitted to the non-rotating shaft body, and the mutual position and the required rotational force can be transmitted between the transmitting part and the transmitted part. The drive rotating part and the driven rotating part can move relatively in the axial direction between mutual positions where the rotational force cannot be transmitted, and the transmitting part and the transmitted part can move to one or both of the driving rotating part and the driven rotating part. The rotational force transmission device according to (4) above, wherein urging forces facing each other in the axial direction are applied so that the required rotational force can be transmitted between the two.
(7) 従動回転部に、径方向外方に向かう成分を有する出力用腕状部が設けられた上記(1)乃至(6)の何れか１項に記載の回転力伝達装置。 (7) The rotational force transmitting device according to any one of (1) to (6) above, wherein the driven rotating portion is provided with an output arm-shaped portion having a component that goes outward in the radial direction.
(8) 上記設定トルクが回転の向きによらず実質上一定である上記(1)乃至(7)の何れか１項に記載の回転力伝達装置。 (8) The rotational force transmission device according to any one of (1) to (7) above, wherein the set torque is substantially constant regardless of the direction of rotation.
(9) 上記軸線方向の付勢力が、弾性体による弾性的な付勢力である上記(1)乃至(8)の何れか１項に記載の回転力伝達装置。 (9) The rotational force transmitting device according to any one of (1) to (8) above, wherein the urging force in the axial direction is an elastic urging force by an elastic body.
本発明の回転力伝達装置によれば、設定トルク未満の負荷においては、軸線方向に互いに向かい合う向きの付勢力により伝達部と被伝達部の間に所要の回転力が伝達され得る状態が維持され、設定トルク以上の負荷が加わった場合は、前記付勢力に抗して伝達部と被伝達部が相対的に軸線方向に離隔する方向に移動することにより所要の回転力の伝達が中断され、負荷が設定トルク未満に戻ることにより、伝達部と被伝達部の間に所要の回転力が伝達され得る状態が回復するので、比較的小さい半径の伝達部と被伝達部における回転力伝達であっても、設定トルクを上回る過大な負荷が加わることを適切に防ぎつつ回転力を効率良く伝達することができる。 According to the rotational force transmission device of the present invention, in a load less than the set torque, a state in which a required rotational force can be transmitted between the transmission portion and the transmitted portion is maintained by the urging force in the direction facing each other in the axial direction. When a load exceeding the set torque is applied, the transmission of the required rotational force is interrupted by moving the transmitting part and the transmitted part in a direction that is relatively separated from each other in the axial direction against the urging force. When the load returns to less than the set torque, the state in which the required rotational force can be transmitted between the transmission part and the transmitted part is restored, so that the rotational force is transmitted between the transmission part and the transmitted part with a relatively small radius. However, the rotational force can be efficiently transmitted while appropriately preventing an excessive load exceeding the set torque from being applied.
[1] 本発明の実施の形態の一例としての回転力伝達装置について、図面を参照しつつ説明する。 [1] A rotational force transmission device as an example of the embodiment of the present invention will be described with reference to the drawings.
この例の回転力伝達装置Ａは、駆動回転部Ｄの伝達部Ｄ１と、駆動回転部Ｄの回転部に対し回転可能且つ軸線方向に摺動可能なように同軸状に外嵌された従動回転部Ｎの被伝達部Ｎ１により、駆動回転部Ｄから従動回転部Ｎへ回転力を伝達するものである。 The rotational force transmission device A of this example is a driven rotation that is coaxially fitted to the transmission unit D1 of the drive rotation unit D and so as to be rotatable and axially slidable with respect to the rotation unit of the drive rotation unit D. A rotational force is transmitted from the drive rotating portion D to the driven rotating portion N by the transmitted portion N1 of the portion N.
駆動回転部Ｄは、基端部Ｄ２と、基端部Ｄ２よりも縮径した軸部Ｄ３と、軸部Ｄ３の先端側に同軸状に形成された円板状の拡径先端部Ｄ４からなる。動力源である電動機Ｍの出力軸Ｍ１と、基端部Ｄ２及び軸部Ｄ３の基部は、それらをそれぞれ貫通する孔にピンＰが挿通されて相対回転不能に連結されている。 The drive rotating portion D includes a base end portion D2, a shaft portion D3 having a diameter smaller than that of the base end portion D2, and a disk-shaped enlarged diameter tip portion D4 formed coaxially on the tip end side of the shaft portion D3. .. The output shaft M1 of the electric motor M, which is a power source, and the bases of the base end portion D2 and the shaft portion D3 are connected to each other so that they cannot rotate relative to each other by inserting a pin P into a hole penetrating them.
従動回転部Ｎは、円筒状基部Ｎ２と、円筒状基部Ｎ２から径方向外方に向かって突出した出力用腕状部Ｎ３からなる。出力用腕状部Ｎ３の先端部が作動対象部材（図示せず）に作用し、円筒状基部Ｎ２の正回転及び逆回転の両方または何れか一方により作動対象部材を動作させるものである。 The driven rotating portion N includes a cylindrical base portion N2 and an output arm-shaped portion N3 projecting outward in the radial direction from the cylindrical base portion N2. The tip of the output arm-shaped portion N3 acts on the actuating target member (not shown), and the actuating target member is operated by both forward rotation and / or reverse rotation of the cylindrical base portion N2.
軸部Ｄ３のうち基端側には従動回転部Ｎにおける円筒状基部Ｎ２が回転可能に同軸状に外嵌され、軸部Ｄ３のうち円筒状基部Ｎ２と拡径先端部Ｄ４の間には、圧縮コイルバネＳが外嵌されている。 The cylindrical base portion N2 of the driven rotating portion N is rotatably and coaxially fitted onto the base end side of the shaft portion D3, and between the cylindrical base portion N2 and the enlarged diameter tip portion D4 of the shaft portion D3. The compression coil spring S is fitted on the outside.
駆動回転部Ｄの基端部Ｄ２のうち先端側の環状端面部が伝達部Ｄ１を構成し、従動回転部Ｎの円筒状基部Ｎ２のうち伝達部Ｄ１に軸方向に相対する環状部が被伝達部Ｎ１を構成する。 Of the base end portion D2 of the drive rotating portion D, the annular end face portion on the distal end side constitutes the transmission portion D1, and of the cylindrical base portion N2 of the driven rotating portion N, the annular portion facing the transmission portion D1 in the axial direction is transmitted. Part N1 is formed.
伝達部Ｄ１と被伝達部Ｎ１には、それぞれ、周方向に所定の中心角を周期とする二等辺三角形状波形の三角波状の波形状部Ｄｗ・Ｎｗが、軸方向に相対するように設けられている。波形状部Ｄｗと波形状部Ｎｗは同一である。伝達部Ｄ１と被伝達部Ｎ１の間には、軸線方向のまわりの回転力の伝達に伴い軸線方向に離隔しようとする向きの軸線方向力が発生し得る。 The transmitting portion D1 and the transmitted portion N1 are provided with triangular wave-shaped wave-shaped portions Dw and Nw having an isosceles triangle-shaped waveform whose period is a predetermined central angle in the circumferential direction so as to face each other in the axial direction. ing. The wave-shaped portion Dw and the wave-shaped portion Nw are the same. An axial force in a direction that tends to separate in the axial direction may be generated between the transmitting portion D1 and the transmitted portion N1 as the rotational force around the axial direction is transmitted.
従動回転部Ｎは、その被伝達部Ｎ１の波形状部Ｎｗが駆動回転部Ｄにおける伝達部Ｄ１の波形状部Ｄｗと噛み合って駆動回転部Ｄから従動回転部Ｎへ所要の回転力が伝達され得る図２に示されるような軸線方向位置（被伝達部Ｎ１と伝達部Ｄ１の両波形状部Ｄｗ・Ｎｗが深く噛み合う軸線方向位置）と、被伝達部Ｎ１の波形状部Ｎｗと駆動回転部Ｄにおける伝達部Ｄ１の波形状部Ｄｗの噛み合いが解除され又は不十分となって所要の回転力の伝達が中断される図３に示されるような軸線方向位置の間を軸線方向に移動し得る。 In the driven rotating portion N, the wave-shaped portion Nw of the transmitted portion N1 meshes with the wave-shaped portion Dw of the transmitting portion D1 in the driven rotating portion D, and the required rotational force is transmitted from the driven rotating portion D to the driven rotating portion N. The axial position as shown in FIG. 2 (the axial position where the wave-shaped portions Dw and Nw of the transmitted portion N1 and the transmitted portion D1 are deeply meshed with each other), and the wave-shaped portion Nw and the drive rotating portion of the transmitted portion N1. It is possible to move in the axial direction between the axial positions as shown in FIG. 3 in which the meshing of the wave-shaped portion Dw of the transmission portion D1 in D is disengaged or insufficient and the transmission of the required rotational force is interrupted. ..
従動回転部Ｎは、圧縮コイルバネＳにより伝達部Ｄ１側へ軸線方向に付勢されていることにより、駆動回転部Ｄから従動回転部Ｎへ伝達されるべきトルク（負荷）が設定トルク未満である場合は、その被伝達部Ｎ１の波形状部Ｎｗが駆動回転部Ｄにおける伝達部Ｄ１の波形状部Ｄｗと深く噛み合って駆動回転部Ｄから従動回転部Ｎへ所要の回転力が伝達され得る図２に示されるような軸線方向位置が維持される。 Since the driven rotating portion N is urged in the axial direction toward the transmitting portion D1 by the compression coil spring S, the torque (load) to be transmitted from the driving rotating portion D to the driven rotating portion N is less than the set torque. In this case, the wave-shaped portion Nw of the transmitted portion N1 is deeply meshed with the wave-shaped portion Dw of the transmitting portion D1 in the drive rotating portion D, and a required rotational force can be transmitted from the driven rotating portion D to the driven rotating portion N. The axial position as shown in 2 is maintained.
設定トルク以上の負荷が加わった場合は、被伝達部Ｎ１と伝達部Ｄ１の両波形状部Ｄｗ・Ｎｗ同士の噛み合いにより、伝達部Ｄ１に対し、被伝達部Ｎ１を有する従動回転部Ｎが圧縮コイルバネＳによる付勢力に抗して軸線方向に押し出され、所要の回転力の伝達が中断されて、駆動回転部Ｄは従動回転部Ｎに対し空転する。設定トルク以上の負荷が継続すれば、被伝達部Ｎ１と伝達部Ｄ１の軸線方向相互位置は、駆動回転部Ｄの回転による波形状部Ｄｗと波形状部Ｎｗの位相の変化に応じて変動する。 When a load equal to or greater than the set torque is applied, the driven rotating portion N having the transmitted portion N1 is compressed with respect to the transmitted portion D1 due to the engagement between the two-wave shaped portions Dw and Nw of the transmitted portion N1 and the transmitted portion D1. It is pushed out in the axial direction against the urging force of the coil spring S, the transmission of the required rotational force is interrupted, and the drive rotating portion D idles with respect to the driven rotating portion N. If the load of the set torque or more continues, the mutual positions of the transmitted portion N1 and the transmitted portion D1 in the axial direction change according to the change in the phase of the wave-shaped portion Dw and the wave-shaped portion Nw due to the rotation of the drive rotating portion D. ..
負荷が設定トルク未満に戻ると、圧縮コイルバネＳの付勢力により被伝達部Ｎ１と伝達部Ｄ１の両波形状部Ｄｗ・Ｎｗ同士が深く噛み合った状態が維持されて所要の回転力が伝達され得る状態が回復する。 When the load returns to less than the set torque, the urging force of the compression coil spring S maintains a state in which the two-wave shape portions Dw and Nw of the transmitted portion N1 and the transmitted portion D1 are deeply meshed with each other, and the required rotational force can be transmitted. The condition recovers.
このようにして、比較的小さい半径の伝達部Ｄ１と被伝達部Ｎ１における回転力伝達であっても、設定トルクを上回る過大な負荷が加わることを適切に防ぎつつ回転力を効率良く伝達することができる。例えば、動力源の出力軸を所定回転角の正回転又は逆回転させることにより、従動回転部Ｎを回転駆動し、出力用腕状部Ｎ３を介して作動対象部材を動作させることができ、作動対象部材に予期しない荷重等が載荷されて伝達部Ｄ１と被伝達部Ｎ１の間に設定トルクを超える過大な負荷が加わった場合は、被伝達部Ｎ１と伝達部Ｄ１の両波形状部Ｄｗ・Ｎｗ同士の噛み合いが解除され又は不十分となって所要の回転力の伝達が中断され、動力源又はその他の箇所に損傷等の不都合が引き起こされることが防がれる。 In this way, even when the rotational force is transmitted between the transmission unit D1 and the transmitted unit N1 having a relatively small radius, the rotational force can be efficiently transmitted while appropriately preventing an excessive load exceeding the set torque from being applied. Can be done. For example, by rotating the output shaft of the power source in the forward or reverse rotation of a predetermined rotation angle, the driven rotating portion N can be rotationally driven, and the actuating target member can be operated via the output arm-shaped portion N3. When an unexpected load or the like is loaded on the target member and an excessive load exceeding the set torque is applied between the transmission unit D1 and the transmission unit N1, the double-wave shape portion Dw of the transmission unit N1 and the transmission unit D1. It is possible to prevent the Nw from being disengaged or insufficiently engaged, interrupting the transmission of the required rotational force, and causing inconvenience such as damage to the power source or other parts.
[2] 本発明の回転力伝達装置の実施の形態を、上記以外の形態を含めて更に説明する。 [2] Embodiments of the rotational force transmission device of the present invention will be further described including embodiments other than the above.
本発明の回転力伝達装置は、駆動回転部の伝達部と従動回転部の被伝達部により、駆動回転部から従動回転部へ回転力を伝達するものである。 The rotational force transmission device of the present invention transmits a rotational force from the drive rotation part to the driven rotation part by the transmission part of the drive rotation part and the transmitted part of the driven rotation part.
(1) 駆動回転部と従動回転部 (1) Drive rotating part and driven rotating part
駆動回転部としては、例えば、電動機又は電動機に減速装置等を組み合わせた動力源の出力軸又はこれに連結される回転部を挙げることができるが、これに限るものではない。 Examples of the drive rotating portion include, but are not limited to, an electric motor or an output shaft of a power source in which a speed reducer or the like is combined with the electric motor, or a rotating portion connected to the output shaft.
従動回転部としては、例えば、駆動回転部の回転力により回転駆動される従動軸や従動環状部を挙げることができるが、これらに限るものではない。 Examples of the driven rotating portion include, but are not limited to, a driven shaft and a driven annular portion that are rotationally driven by the rotational force of the driving rotating portion.
駆動回転部と従動回転部は、同軸状をなし、同一の回転軸線のまわりに回転するものであることが望ましいが、必ずしもこれに限るものではない。 It is desirable that the drive rotating portion and the driven rotating portion are coaxial and rotate around the same rotation axis, but the present invention is not limited to this.
(2) 伝達部と被伝達部 (2) Transmission part and transmitted part
(2-1) 駆動回転部の伝達部と従動回転部の被伝達部は、軸線方向に相対し、それらの伝達部と被伝達部の間には、軸線方向のまわりの回転の回転力の伝達に伴い軸線方向に離隔しようとする向きの軸線方向力が発生し得る。伝達部と被伝達部は、両者が相接して両者の間に所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で相対的に軸線方向に移動し得、駆動回転部と従動回転部の一方又は両方には、軸線方向に互いに向かい合う向きの付勢力が加えられている。 (2-1) The transmitted part of the drive rotating part and the transmitted part of the driven rotating part face each other in the axial direction, and between the transmitted part and the transmitted part, the rotational force of rotation around the axial direction is applied. Along with the transmission, an axial force in a direction that tends to separate in the axial direction may be generated. The transmitting part and the transmitted part move relatively in the axial direction between the mutual position where the required rotational force can be transmitted between the two in contact with each other and the mutual position where the required rotational force cannot be transmitted. Therefore, one or both of the drive rotating portion and the driven rotating portion are subjected to urging forces in directions facing each other in the axial direction.
付勢力は、弾性的な付勢力であることが好ましい。例えば、圧縮コイルばね又は引張コイルばね等の弾性体による弾性的な付勢力を挙げることができるが、これに限るものではない。 The urging force is preferably an elastic urging force. For example, elastic urging force by an elastic body such as a compression coil spring or a tension coil spring can be mentioned, but the present invention is not limited to this.
このような構成としては、例えば、円柱状又は円筒状の駆動回転部と従動回転部が、それらの一方又は両方が軸線方向に移動し得るように同軸状に配置され、それらの駆動回転部と従動回転部の一方又は両方に対し、伝達部と被伝達部の間に所要の回転力が伝達され得るように圧縮コイルばね等による軸線方向の付勢力が加えられたものを挙げることができる。 In such a configuration, for example, a cylindrical or cylindrical drive rotating portion and a driven rotating portion are coaxially arranged so that one or both of them can move in the axial direction, and the drive rotating portion thereof An axial urging force such as a compression coil spring is applied to one or both of the driven rotating portions so that a required rotational force can be transmitted between the transmitting portion and the transmitted portion.
このような構成のより具体的な例としては、
互いに独立状をなし（同一の基体に対しそれぞれ支持体等を介して回転可能に支持されたものを含む）、伝達部と被伝達部の間に所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で駆動回転部と従動回転部が相対的に軸線方向に移動し得、駆動回転部と従動回転部の一方又は両方に対し、伝達部と被伝達部の間に所要の回転力が伝達され得るように圧縮コイルばね等による軸線方向に互いに向かい合う向きの付勢力が加えられたもの、
駆動回転部と従動回転部の何れか一方における回転軸等の回転部に、相対回転可能に他方の回転部が同軸状に外嵌し、伝達部と被伝達部の間に所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で駆動回転部と従動回転部が相対的に軸線方向に移動し得、駆動回転部と従動回転部の一方又は両方に対し、伝達部と被伝達部の間に所要の回転力が伝達され得るように圧縮コイルばね等による軸線方向に互いに向かい合う向きの付勢力が加えられたもの、
非回転軸体（中実でも筒状でもよい）に対し、駆動回転部と従動回転部が回転可能に同軸状に外嵌し、伝達部と被伝達部の間に所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で駆動回転部と従動回転部が相対的に軸線方向に移動し得、駆動回転部と従動回転部の一方又は両方に対し、伝達部と被伝達部の間に所要の回転力が伝達され得るように圧縮コイルばね等による軸線方向に互いに向かい合う向きの付勢力が加えられたもの、
などを挙げることができる。
A more specific example of such a configuration is
Mutual positions and requirements that are independent of each other (including those that are rotatably supported by the same substrate via a support or the like) and that the required rotational force can be transmitted between the transmitting unit and the transmitted unit. The drive rotating part and the driven rotating part can move relatively in the axial direction between the mutual positions where the rotational force of the above cannot be transmitted, and the transmitting part and the driven rotating part are transmitted to one or both of the driving rotating part and the driven rotating part. A compression coil spring or the like that applies urging forces that face each other in the axial direction so that the required rotational force can be transmitted between the parts.
The other rotating part is coaxially fitted to the rotating part such as the rotating shaft in either the driving rotating part or the driven rotating part so that the other rotating part can rotate relative to each other, and a required rotational force is applied between the transmitting part and the transmitted part. The drive rotating part and the driven rotating part can move relatively axially between the mutual position that can be transmitted and the mutual position where the required rotational force cannot be transmitted, and to one or both of the driving rotating part and the driven rotating part. On the other hand, a compression coil spring or the like is applied with urging forces facing each other in the axial direction so that the required rotational force can be transmitted between the transmitting portion and the transmitted portion.
The drive rotating part and the driven rotating part are rotatably and coaxially fitted to the non-rotating shaft body (which may be solid or tubular), and the required rotational force is transmitted between the transmitting part and the transmitted part. The drive rotating part and the driven rotating part can move relatively in the axial direction between the mutual position obtained and the mutual position where the required rotational force cannot be transmitted, and with respect to one or both of the driving rotating part and the driven rotating part. A compression coil spring or the like that applies urging forces facing each other in the axial direction so that the required rotational force can be transmitted between the transmitting part and the transmitted part.
And so on.
従動回転部には、例えば、径方向外方に向かう成分を有する（軸線方向成分を有してもよい）作用腕、連接棒、クランク軸を介した連接棒等の、直線状又は屈曲若しくは湾曲状の出力用腕状部を設けることもできる。 The driven rotating portion is linear or bent or curved, for example, an acting arm having a component outward in the radial direction (which may have an axial component), a connecting rod, a connecting rod via a crankshaft, or the like. It is also possible to provide an arm-shaped portion for output.
(2-2) 駆動回転部の伝達部としては、例えば、動力源の出力軸の先端部、環状端面部（拡径又は縮径により形成された環状端面部）、回転軸線のまわりに回転対称状に形成された凹部の底部等を挙げることができる。 (2-2) As the transmission part of the drive rotating part, for example, the tip part of the output shaft of the power source, the annular end face part (the annular end face part formed by expanding or reducing the diameter), and the rotational symmetry around the rotation axis. The bottom of the recess formed in a shape can be mentioned.
駆動回転部の伝達部の基本形状としては、例えば、円柱状、円筒状又はその他の横断面形状の駆動回転部における、
回転軸線に直交する端面部（例えば円形又は円環状の端面部）、
先端に向かって縮径する円錐台形状の外周面部若しくは先端に向かって拡径する円錐台形状の内周面部に相当する部分、
先端に向かって縮径する円錐形状の外周面部若しくは先端に向かって拡径する円錐形状の内周面部、
半球状の凸面部若しくは凹面部又はその他の湾曲状の凸面部若しくは凹面部、或いは、
これらにおける回転軸線を中心とする所定の環状部分であって、
駆動回転部の回転軸線を軸とする回転体を形成するもの又は駆動回転部の回転軸線のまわりに回転対称状をなすものを挙げることができるが、これらに限るものではない。
The basic shape of the transmission part of the drive rotating part is, for example, in a cylindrical, cylindrical or other cross-sectional shape drive rotating part.
End faces orthogonal to the axis of rotation (eg circular or annular end faces),
A portion corresponding to the outer peripheral surface of the truncated cone shape whose diameter decreases toward the tip or the inner peripheral surface portion of the truncated cone shape whose diameter increases toward the tip.
A conical outer peripheral surface whose diameter decreases toward the tip or a conical inner peripheral surface whose diameter increases toward the tip,
Hemispherical convex or concave part or other curved convex or concave part, or
It is a predetermined annular portion centered on the rotation axis in these, and is
Examples thereof include those forming a rotating body about the rotation axis of the drive rotating portion and those forming a rotational symmetry around the rotation axis of the drive rotating portion, but the present invention is not limited thereto.
(2-3) 従動回転部の被伝達部としては、例えば、駆動回転部の回転力により回転駆動される従動軸や従動環状部の先端部、拡径部、回転軸線のまわりに回転対称状に形成された凹部の底部を挙げることができる。 (2-3) The transmitted portion of the driven rotating portion includes, for example, a driven shaft that is rotationally driven by the rotational force of the driven rotating portion, a tip portion of the driven annular portion, a diameter-expanded portion, and a rotational symmetry around the rotating axis. The bottom of the recess formed in can be mentioned.
従動回転部の被伝達部の基本形状は、伝達部との間に所要の回転力が伝達され得るように伝達部の形状に対応する形状である。 The basic shape of the transmitted portion of the driven rotating portion is a shape corresponding to the shape of the transmitting portion so that a required rotational force can be transmitted to and from the transmitting portion.
伝達部の基本形状が前記のような形状である場合、従動回転部の被伝達部の基本形状は、それぞれに対応する形状、すなわち例えば、
円柱状、円筒状又はその他の横断面形状の従動回転部における、
回転軸線に直交する端面部（例えば円形又は円環状の端面部）、
先端に向かって拡径する円錐台形状の内周面部若しくは先端に向かって縮径する円錐台形状の外周面部に相当する部分、
先端に向かって拡径する円錐形状の内周面部若しくは先端に向かって縮径する円錐形状の外周面部、
半球状の凹面部若しくは凸面部又はその他の湾曲状の凹面部若しくは凸面部、或いは、
これらにおける回転軸線を中心とする所定の環状部分であって、
従動回転部の回転軸線を軸とする回転体を形成するもの又は従動回転部の回転軸線のまわりに回転対称状をなすものを挙げることができるが、これらに限るものではない。
When the basic shape of the transmission portion is as described above, the basic shape of the transmitted portion of the driven rotating portion is a shape corresponding to each, that is, for example,
In a driven rotating part of a columnar, cylindrical or other cross-sectional shape,
End faces orthogonal to the axis of rotation (eg circular or annular end faces),
A portion corresponding to the inner peripheral surface of the truncated cone shape whose diameter increases toward the tip or the outer peripheral surface portion of the truncated cone shape whose diameter decreases toward the tip.
A conical inner peripheral surface whose diameter increases toward the tip or a conical outer peripheral surface whose diameter decreases toward the tip,
Hemispherical concave or convex or other curved concave or convex, or
It is a predetermined annular portion centered on the rotation axis in these, and is
Examples thereof include those forming a rotating body about the rotation axis of the driven rotating portion and those forming a rotational symmetry around the rotating axis of the driven rotating portion, but are not limited thereto.
(2-4) 伝達部と被伝達部の基本形状における表面部の形態は、
軸線方向に相対した状態の伝達部と被伝達部の間に、軸線方向のまわりの回転力の伝達に伴い軸線方向に離隔しようとする向きの軸線方向力が発生し得、
設定トルク未満の負荷においては、軸線方向に互いに向かい合う向きの付勢力により前記伝達部と被伝達部の間に所要の回転力が伝達され得る状態が維持され、
設定トルク以上の負荷が加わった場合は、前記付勢力に抗して前記伝達部と被伝達部が相対的に軸線方向に離隔する方向に移動することにより所要の回転力の伝達が中断され、負荷が設定トルク未満に戻ることにより、前記伝達部と被伝達部の間に所要の回転力が伝達され得る状態が回復するものであることを要する。
(2-4) The form of the surface part in the basic shape of the transmitting part and the transmitted part is
An axial force in a direction that tends to separate in the axial direction may be generated between the transmitting portion and the transmitted portion in a state facing the axial direction as the rotational force around the axial direction is transmitted.
When the load is less than the set torque, a state in which the required rotational force can be transmitted between the transmission portion and the transmitted portion is maintained by the urging force in the direction facing each other in the axial direction.
When a load greater than or equal to the set torque is applied, the transmission of the required rotational force is interrupted by moving the transmitting portion and the transmitted portion in a direction relatively separated from each other in the axial direction against the urging force. When the load returns to less than the set torque, it is necessary to recover the state in which the required rotational force can be transmitted between the transmission portion and the transmitted portion.
伝達部の基本形状における表面部の形態と被伝達部の基本形状における表面部の形態の組み合わせの例としては、
・伝達部と被伝達部の何れか一方に多数の凸部（例えば周方向に傾斜面を有する凸部）が設けられ、他方に多数の凸部又は凹部（例えば周方向に傾斜面を有する凹部）が設けられ、
設定トルク未満の負荷においては、前記軸線方向の付勢力により伝達部と被伝達部の軸線方向相互位置が所定の範囲内に維持されて両者の凸部同士又は凸部と凹部の噛み合いにより所要の回転力が伝達され得る状態が維持され、
設定トルク以上の負荷が加わった場合は、前記付勢力に抗して両者の凸部同士又は凸部と凹部が伝達部と被伝達部を所定の範囲よりも相対的に軸線方向に離隔させて前記の噛み合いが解除され又は不十分となって所要の回転力の伝達が中断されるもの、
・伝達部と被伝達部の両方における少なくとも回転軸線を中心とする所定半径方向幅の環状部分に、所定の中心角を周期として軸線方向の振幅を有する波形状部（周方向に進行する波形状部。半径方向において振幅が変化しないことが望ましい。）がそれぞれ設けられ、
設定トルク未満の負荷においては、前記軸線方向の付勢力により伝達部と被伝達部の軸線方向相互位置が所定の範囲内に維持されて両者の波形状部同士の噛み合いにより所要の回転力が伝達され得る状態が維持され、
設定トルク以上の負荷が加わった場合は、前記付勢力に抗して両者の波形状部同士が伝達部と被伝達部を所定の範囲よりも相対的に軸線方向に離隔させ、前記の噛み合いが解除され又は不十分となって所要の回転力の伝達が中断されるもの
を挙げることができるが、これらに限るものではない。
As an example of the combination of the shape of the surface portion in the basic shape of the transmitting portion and the shape of the surface portion in the basic shape of the transmitted portion,
-A large number of convex portions (for example, convex portions having an inclined surface in the circumferential direction) are provided on either one of the transmitting portion and the transmitted portion, and a large number of convex portions or concave portions (for example, a concave portion having an inclined surface in the circumferential direction) on the other side. ) Is provided,
When the load is less than the set torque, the axial mutual position of the transmitting part and the transmitted part is maintained within a predetermined range by the urging force in the axial direction, and it is required by the meshing of the convex portions or the convex portion and the concave portion of both. The state in which the rotational force can be transmitted is maintained,
When a load greater than the set torque is applied, the convex parts of the two or the convex parts and the concave parts separate the transmitting part and the transmitted part relatively in the axial direction from the predetermined range against the urging force. Those whose meshing is disengaged or insufficient and the transmission of the required torque is interrupted.
-A wave-shaped portion (wave shape traveling in the circumferential direction) having an axial amplitude with a predetermined central angle as a period in an annular portion having a predetermined radial width centered on at least the rotation axis in both the transmitting portion and the transmitted portion. It is desirable that the amplitude does not change in the radial direction.)
When the load is less than the set torque, the axial mutual position of the transmitting part and the transmitted part is maintained within a predetermined range by the urging force in the axial direction, and the required rotational force is transmitted by the meshing of the wave-shaped parts of both. The state that can be maintained is maintained
When a load greater than or equal to the set torque is applied, the wave-shaped portions of both sides separate the transmitting portion and the transmitted portion relative to the predetermined range in the axial direction against the urging force, and the above-mentioned meshing occurs. Examples include, but are not limited to, those that are released or insufficient to interrupt the transmission of the required torque.
前記波形状部としては、例えば、
周方向に、三角波状、曲線波状（典型的には例えば正弦波状）、又は鋸歯状の波形をなし、設定トルク以上の負荷が加わった場合における伝達部と被伝達部の噛み合いの解除と回復が円滑に行われるものを挙げることができるが、これらに限るものではない。
The wave-shaped portion includes, for example,
In the circumferential direction, it has a triangular wave shape, a curved wave shape (typically, for example, a sinusoidal shape), or a sawtooth shape, and when a load exceeding the set torque is applied, the disengagement and recovery of the transmission part and the transmitted part are released. Some of them can be done smoothly, but they are not limited to these.
設定トルクは、回転の向きによらず実質上一定とすることができる他、回転の向きに応じて異なるトルクを設定することもできる。 The set torque can be substantially constant regardless of the direction of rotation, and different torques can be set according to the direction of rotation.
回転の向きによらず実質上一定のトルクを設定するには、例えば、伝達部と被伝達部の凸部同士若しくは凸部と凹部又は波形状部同士の接触する角度等の態様が回転の向きによらず一定であるものとすることが挙げられる。例えば、二等辺三角形状の波形の三角波状、正弦波状の曲線波状である。 In order to set a substantially constant torque regardless of the direction of rotation, for example, the direction of rotation is such that the convex portions of the transmitting portion and the transmitted portion or the convex portions and the concave portions or the corrugated portions contact each other. It can be mentioned that it is constant regardless. For example, it is an isosceles triangle waveform, a triangular wave shape, or a sinusoidal curved wave shape.
回転の向きに応じて異なるトルクを設定するには、例えば、伝達部と被伝達部の凸部同士若しくは凸部と凹部又は波形状部同士の接触する角度等の態様が、回転の向き応じて異なるものとすることが挙げられる。例えば、回転軸線に直交する面に対する角度を小さくすれば設定トルクを小さくすることができ、その角度を大きくすれば設定トルクを大きくすることができる。 In order to set different torques depending on the direction of rotation, for example, the angle at which the convex portions of the transmitting portion and the transmitted portion or the convex portions and the concave portions or the corrugated portions contact each other may be adjusted according to the direction of rotation. It can be said that they are different. For example, the set torque can be reduced by reducing the angle with respect to the plane orthogonal to the rotation axis, and the set torque can be increased by increasing the angle.
Ａ 回転力伝達装置
Ｄ 駆動回転部
Ｄ１ 伝達部
Ｄ２ 基端部
Ｄ３ 軸部
Ｄ４ 拡径先端部
Ｄｗ 波形状部
Ｍ 電動機
Ｍ１ 出力軸
Ｎ 従動回転部
Ｎ１ 被伝達部
Ｎ２ 円筒状基部
Ｎ３ 出力用腕状部
Ｎｗ 波形状部
Ｐ ピン
Ｓ 圧縮コイルバネ
A Rotational force transmission device D Drive rotation part D1 Transmission part D2 Base end part D3 Shaft part D4 Diameter expansion tip part Dw Wave shape part M Electric motor M1 Output shaft N Driven rotation part N1 Transmission part N2 Cylindrical base part N3 Output arm shape Part Nw Wave shape part P pin S Compression coil spring
Claims (9)
前記従動回転部に、径方向外方に向かう成分を有する出力用腕状部であって、前記回転軸線のまわりに前記従動回転部と共に所定回転角の正回転又は逆回転をすることにより、その出力用腕状部を介して作動対象部材を動作させ得るものが設けられ、
前記伝達部及び被伝達部の双方における少なくとも回転軸線を中心とする所定半径方向幅の環状部分に、所定の中心角を周期として軸線方向の振幅を有する三角波状又は曲線波状の周方向連続波形状部がそれぞれ設けられ、
前記伝達部と被伝達部は軸線方向に相対し、前記伝達部と被伝達部の間には、軸線方向のまわりの回転力の伝達に伴い軸線方向に離隔しようとする向きの軸線方向力が発生し得、
前記伝達部と被伝達部は、所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で相対的に軸線方向に移動し得、
前記駆動回転部と従動回転部の一方又は両方には、軸線方向に互いに向かい合う向きの付勢力が加えられており、
設定トルク未満の負荷においては、前記軸線方向の付勢力により前記伝達部と被伝達部の軸線方向相互位置が所定の範囲内に維持されて両者の周方向連続波形状部同士の噛み合いにより所要の回転力が伝達され、前記駆動回転部と共に前記出力用腕状部が回転し得る状態が維持され、
前記作動対象部材に対する予期しない荷重載荷等により出力用腕状部を介して設定トルク以上の負荷が加わった場合は、前記付勢力に抗して両者の周方向連続波形状部同士が伝達部と被伝達部を所定の範囲よりも相対的に軸線方向に離隔させ、前記の噛み合いが解除され又は不十分となって所要の回転力の伝達が中断され、
負荷が設定トルク未満に戻ることにより、前記伝達部と被伝達部の間に所要の回転力が伝達され得る状態が回復することを特徴とする回転力伝達装置。 It is a device that transmits rotational force by the transmission part of the drive rotation part and the transmitted part of the driven rotation part that rotate around the same rotation axis .
An output arm-shaped portion having a component outward in the radial direction in the driven rotating portion, which is rotated forward or reversely at a predetermined rotation angle together with the driven rotating portion around the rotation axis. A member capable of operating the operating target member via the output arm-shaped portion is provided.
A triangular wave-like or curved wave-like continuous wave shape having an axial amplitude with a predetermined central angle as a period in an annular portion having a predetermined radial width centered on at least the rotation axis in both the transmission portion and the transmitted portion. Each part is provided,
The transmitted portion and the transmitted portion face each other in the axial direction, and an axial force in a direction that tends to separate in the axial direction as the rotational force around the axial direction is transmitted between the transmitted portion and the transmitted portion. Can occur,
The transmitted portion and the transmitted portion may move relatively axially between a mutual position where the required rotational force can be transmitted and a mutual position where the required rotational force cannot be transmitted.
One or both of the drive rotating portion and the driven rotating portion are subjected to urging forces in directions facing each other in the axial direction.
When the load is less than the set torque, the axial mutual position of the transmitting portion and the transmitted portion is maintained within a predetermined range by the urging force in the axial direction, and it is required by the meshing of the continuous wave-shaped portions in the circumferential direction of the two . The rotational force is transmitted, and the state in which the output arm-shaped portion can rotate together with the drive rotating portion is maintained.
When a load exceeding the set torque is applied through the output arm-shaped portion due to an unexpected load on the member to be operated, the circumferential continuous wave-shaped portions of both are connected to the transmitting portion against the urging force. The transmitted portion is separated in the axial direction relative to the predetermined range, and the above-mentioned meshing is released or insufficient, so that the transmission of the required rotational force is interrupted.
A rotational force transmitting device, characterized in that when the load returns to less than a set torque, a state in which a required rotational force can be transmitted between the transmitting portion and the transmitted portion is restored.
前記駆動回転部の基端部のうち先端側に有する伝達部と、前記従動回転部の基端側に有する被伝達部が、軸方向に相対し、前記伝達部と被伝達部の間に所要の回転力が伝達され得る相互位置と所要の回転力が伝達され得ない相互位置の間で前記駆動回転部に対し前記従動回転部が軸線方向に移動し得、
前記駆動回転部のうち前記従動回転部よりも先端側の部分と、その従動回転部の間に、前記伝達部と被伝達部の間に所要の回転力が伝達され得るように軸線方向に互いに向かい合う向きの付勢力が加えられている請求項１乃至４の何れか１項に記載の回転力伝達装置。 The driven rotating part is coaxially fitted to the drive rotating part so that it can rotate.
The transmission portion on the distal end side of the base end portion of the drive rotating portion and the transmitted portion on the proximal end side of the driven rotating portion face each other in the axial direction, and are required between the transmitting portion and the transmitted portion. The driven rotating part can move in the axial direction with respect to the driving rotating part between the mutual position where the rotational force of the above can be transmitted and the mutual position where the required rotational force cannot be transmitted.
Of the drive rotating parts, a portion closer to the tip side than the driven rotating part and the driven rotating part thereof, and each other in the axial direction so that a required rotational force can be transmitted between the transmitting part and the transmitted part. The rotational force transmission device according to any one of claims 1 to 4, wherein urging forces in opposite directions are applied.
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