JP2017040310A - Multiple-plate clutch - Google Patents

Multiple-plate clutch Download PDF

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JP2017040310A
JP2017040310A JP2015162695A JP2015162695A JP2017040310A JP 2017040310 A JP2017040310 A JP 2017040310A JP 2015162695 A JP2015162695 A JP 2015162695A JP 2015162695 A JP2015162695 A JP 2015162695A JP 2017040310 A JP2017040310 A JP 2017040310A
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friction
plate
spline
clutch
diameter side
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崇穂 川上
Takao Kawakami
崇穂 川上
元樹 田淵
Motoki Tabuchi
元樹 田淵
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

PROBLEM TO BE SOLVED: To release a multiple-plate clutch by a leaf spring structure of a friction plate.SOLUTION: A multiple-plate clutch 1 includes a plurality of first friction plates 2 of which an outer diameter side spline part 20 is fitted into a clutch drum 4, and a plurality of second friction plates 3 of which an inner diameter side spline part 30 is fitted into a clutch hub 5, and the first friction plates 2 and the second friction plates 3 are engaged or released. The outer diameter side spline part 20 includes a leaf spring structure part 21a integrated with one first friction plate 2, and inclined so as to project toward an adjacent first friction plate 2 side.SELECTED DRAWING: Figure 1

Description

本発明は、多板クラッチに関する。   The present invention relates to a multi-plate clutch.

車両に搭載された多板クラッチが知られている（例えば特許文献１参照）。特許文献１の多板クラッチは、油圧アクチュエータによって摩擦板を係合し、リターンスプリングによって摩擦板を開放するように構成されている。   A multi-plate clutch mounted on a vehicle is known (see, for example, Patent Document 1). The multi-plate clutch of Patent Document 1 is configured to engage a friction plate with a hydraulic actuator and open the friction plate with a return spring.

特開２０１４−１９０４８６号公報JP 2014-190486 A

しかしながら、特許文献１の多板クラッチでは、摩擦板を開放するためのリターンスプリングを備えているので、リターンスプリングの分だけトランスミッションが重くなるとともに大型化してしまう。   However, since the multi-plate clutch of Patent Document 1 includes a return spring for opening the friction plate, the transmission becomes heavier and larger in size by the amount of the return spring.

本発明は、上記の事情に鑑みてなされたものであって、リターンスプリングを用いることなく開放することができる多板クラッチを提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object thereof is to provide a multi-plate clutch that can be opened without using a return spring.

本発明は、クラッチドラムに外径側スプライン部が嵌合している複数の第１摩擦板と、クラッチハブに内径側スプライン部が嵌合している複数の第２摩擦板とを備え、前記第１摩擦板と前記第２摩擦板とが係合もしくは開放する多板クラッチにおいて、前記外径側または内径側スプライン部は、前記第１または第２摩擦板と一体構造、かつ隣接する前記第１または第２摩擦板側へ向けて突出するように傾けられた板バネ構造の第１スプライン凸部と、径方向に沿って延びている第２スプライン凸部とを含み、前記隣接する第１摩擦板同士または前記隣接する第２摩擦板同士で、前記第１スプライン凸部と前記第２スプライン凸部とが接触することによって、係合している前記第１摩擦板と前記第２摩擦板とを開放させる方向に荷重を生じることを特徴とする。   The present invention includes a plurality of first friction plates in which outer diameter side spline portions are fitted to the clutch drum, and a plurality of second friction plates in which inner diameter side spline portions are fitted to the clutch hub, In the multi-plate clutch in which the first friction plate and the second friction plate are engaged or released, the outer diameter side or inner diameter side spline portion is integrated with the first or second friction plate and adjacent to the first friction plate. Including a first spline convex portion of a leaf spring structure inclined so as to protrude toward the first or second friction plate side, and a second spline convex portion extending in the radial direction, and adjacent to the first spline convex portion The first friction plate and the second friction plate engaged with each other when the first spline convex portion and the second spline convex portion contact each other between the friction plates or the adjacent second friction plates. A load may be generated in the direction of releasing The features.

本発明に係る多板クラッチでは、摩擦板のスプライン部は、隣接する摩擦板側へ向けて突出するように傾けられた板バネ構造の第１スプライン凸部を有する。これにより、隣接する摩擦板同士で第１スプライン凸部と第２スプライン凸部とが接触して多板クラッチを開放させる方向の荷重が生じる。   In the multi-plate clutch according to the present invention, the spline portion of the friction plate has a first spline convex portion having a leaf spring structure inclined so as to protrude toward the adjacent friction plate side. Thereby, the load of the direction which makes a 1st spline convex part and a 2nd spline convex part contact between adjacent friction plates, and open | releases a multi-plate clutch arises.

本発明に係る多板クラッチでは、摩擦板のスプライン部に、隣接する摩擦板側へ向けて突出するように傾けられた板バネ構造の第１スプライン凸部が設けられている。これにより、隣接する摩擦板同士で第１スプライン凸部と第２スプライン凸部とが接触して多板クラッチを開放させる方向の荷重が生じる。従来構成のようにリターンスプリングを設けなくても、摩擦板の構造によって多板クラッチを開放することができる。   In the multi-plate clutch according to the present invention, a first spline convex portion having a leaf spring structure that is inclined so as to protrude toward the adjacent friction plate is provided on the spline portion of the friction plate. Thereby, the load of the direction which makes a 1st spline convex part and a 2nd spline convex part contact between adjacent friction plates, and open | releases a multi-plate clutch arises. Even if a return spring is not provided as in the conventional configuration, the multi-plate clutch can be released by the structure of the friction plate.

図１は、本発明の実施形態における多板クラッチを模式的に示す説明図である。FIG. 1 is an explanatory view schematically showing a multi-plate clutch in an embodiment of the present invention. 図２（ａ）は、図１のＸ−Ｘ断面を示す断面図である。図２（ｂ）は、径方向外側から摩擦板のスプライン凸部を見た場合を示す説明図である。FIG. 2A is a cross-sectional view showing the XX cross section of FIG. FIG.2 (b) is explanatory drawing which shows the case where the spline convex part of a friction board is seen from radial direction outer side. 図３（ａ）は、変形例の板バネ構造部を模式的に示す説明図である。図３（ｂ）は、径方向外側から図３（ａ）に示す摩擦板のスプライン凸部を見た場合を示す説明図である。FIG. 3A is an explanatory view schematically showing a leaf spring structure portion of a modification. FIG.3 (b) is explanatory drawing which shows the case where the spline convex part of the friction board shown to Fig.3 (a) is seen from radial direction outer side. 図４は、別の変形例における多板クラッチを模式的に示す説明図である。FIG. 4 is an explanatory view schematically showing a multi-plate clutch in another modified example.

以下、図面を参照して、本発明の実施形態における多板クラッチについて具体的に説明する。   Hereinafter, a multi-plate clutch according to an embodiment of the present invention will be described in detail with reference to the drawings.

図１は、本実施形態の多板クラッチを模式的に示す説明図である。図２（ａ）は、図１のＸ−Ｘ断面を示す断面図である。図２（ｂ）は、径方向外側から摩擦板のスプライン凸部を見た場合を示す説明図である。なお、図１に示す多板クラッチは開放状態である。   FIG. 1 is an explanatory view schematically showing a multi-plate clutch of the present embodiment. FIG. 2A is a cross-sectional view showing the XX cross section of FIG. FIG.2 (b) is explanatory drawing which shows the case where the spline convex part of a friction board is seen from radial direction outer side. The multi-plate clutch shown in FIG. 1 is in an open state.

図１に示すように、多板クラッチ１は、いずれも円環状の板部材からなる複数の第１摩擦板２および第２摩擦板３を備えている。多板クラッチ１において、第１摩擦板２の外径側スプライン部２０がクラッチドラム４の内径側に嵌合し、かつ第２摩擦板３の内径側スプライン部３０がクラッチハブ５の外径側に嵌合している。   As shown in FIG. 1, the multi-plate clutch 1 includes a plurality of first friction plates 2 and second friction plates 3 each made of an annular plate member. In the multi-plate clutch 1, the outer diameter side spline portion 20 of the first friction plate 2 is fitted to the inner diameter side of the clutch drum 4, and the inner diameter side spline portion 30 of the second friction plate 3 is the outer diameter side of the clutch hub 5. Is fitted.

そのスプライン嵌合状態の各摩擦板２，３は、軸線方向において摩擦部分同士が対向するようにして交互に配置されている。すなわち、隣接する二枚の第１摩擦板２，２の間に第２摩擦板３が設けられている。そして、多板クラッチ１は、第１摩擦板２と第２摩擦板３とが摩擦係合もしくは開放することによって、係合もしくは開放するように構成されている。多板クラッチ１は、図示しない周知のアクチュエータによって係合するように構成されている。   The friction plates 2 and 3 in the spline fitting state are alternately arranged so that the friction portions face each other in the axial direction. That is, the second friction plate 3 is provided between two adjacent first friction plates 2 and 2. The multi-plate clutch 1 is configured to be engaged or released when the first friction plate 2 and the second friction plate 3 are frictionally engaged or released. The multi-plate clutch 1 is configured to be engaged by a known actuator (not shown).

例えば、多板クラッチ１は、車両に搭載され、変速機構で変速段を設定するための係合装置として用いることができる。この場合に、クラッチドラム４とクラッチハブ５とは、図示しない変速機構の回転軸等に取り付けられている。なお、車両や変速機構は周知の構成であってよいので、ここでの説明は省略する。   For example, the multi-plate clutch 1 is mounted on a vehicle and can be used as an engagement device for setting a gear stage with a transmission mechanism. In this case, the clutch drum 4 and the clutch hub 5 are attached to a rotating shaft or the like of a transmission mechanism (not shown). Since the vehicle and the speed change mechanism may have a known configuration, the description thereof is omitted here.

本実施形態では、第１摩擦板２の外径側スプライン部２０に形成された板バネ構造によって、多板クラッチ１が開放するように構成されている。図２（ａ）に示すように、外径側スプライン部２０は、円環状の摩擦部から径方向外側に突出する径方向凸部（以下「スプライン凸部」という）２１と、径方向凹部（スプライン凹部）２２とにより形成されている。   In this embodiment, the multi-plate clutch 1 is configured to be released by a leaf spring structure formed on the outer diameter side spline portion 20 of the first friction plate 2. As shown in FIG. 2A, the outer diameter side spline portion 20 includes a radial convex portion (hereinafter referred to as “spline convex portion”) 21 protruding radially outward from an annular friction portion, and a radial concave portion ( Spline recess) 22.

スプライン凸部２１は、円環状の板部材と一体構造かつ摩擦部よりも軸線方向に突出するように傾けられた板バネ構造の第１スプライン凸部（以下「板バネ構造部」という）２１ａと、摩擦部から径方向に沿って延びているストレート構造の第２スプライン凸部（以下「ストレート部」という）２１ｂとを含む。図１に示すように、板バネ構造部２１ａは、径方向すなわちストレート部２１ｂに対して傾斜している。例えば、第１摩擦板２を曲げ加工することによって板バネ構造部２１ａが形成される。また、複数の第１摩擦板２が配置された場合の相対関係において、板バネ構造部２１ａは、隣接する第１摩擦板２のストレート部２１ｂ側へ向けて突出するように傾けられた構造を有することになる。多板クラッチ１において、外径側スプライン部２０とクラッチドラム４との嵌合部分６では、スプライン凸部２１における板バネ構造部２１ａおよびストレート部２１ｂがクラッチドラム４に嵌合している。   The spline convex portion 21 is a first spline convex portion (hereinafter referred to as “plate spring structure portion”) 21 a having a plate spring structure that is integrally formed with the annular plate member and inclined so as to protrude in the axial direction from the friction portion. And a second spline convex portion (hereinafter referred to as “straight portion”) 21b having a straight structure extending along the radial direction from the friction portion. As shown in FIG. 1, the leaf spring structure portion 21a is inclined with respect to the radial direction, that is, the straight portion 21b. For example, the leaf spring structure 21 a is formed by bending the first friction plate 2. Further, in a relative relationship when a plurality of first friction plates 2 are arranged, the leaf spring structure portion 21a has a structure inclined so as to protrude toward the straight portion 21b side of the adjacent first friction plate 2. Will have. In the multi-plate clutch 1, the leaf spring structure portion 21 a and the straight portion 21 b of the spline convex portion 21 are fitted to the clutch drum 4 at the fitting portion 6 between the outer diameter side spline portion 20 and the clutch drum 4.

ここで、図２（ｂ）に示すように、複数の第１摩擦板２のうち隣接する二枚の第１摩擦板２，２を一方の第１摩擦板２Ａと他方の第１摩擦板２Ｂと区別して、板バネ構造部２１ａの構造を説明する。板バネ構造部２１ａが一方の第１摩擦板２Ａに設けられている場合、その板バネ構造部２１ａは、他方の第１摩擦板２Ｂ側に設けられたストレート部２１ｂに向けて突出している。つまり、隣接する二枚の第１摩擦板２Ａ，２Ｂにおいて、板バネ構造部２１ａとストレート部２１ｂとは、円周方向で同じ位相を有する箇所に設けられ、軸線方向に対向している。要するに、隣接する二枚の第１摩擦板２Ａ，２Ｂの相対関係において、板バネ構造部２１ａが突出している先にストレート部２１ｂが設けられていればよい。   Here, as shown in FIG. 2B, of the plurality of first friction plates 2, two adjacent first friction plates 2, 2 are divided into one first friction plate 2A and the other first friction plate 2B. The structure of the leaf spring structure portion 21a will be described separately. When the leaf spring structure portion 21a is provided on one first friction plate 2A, the leaf spring structure portion 21a protrudes toward the straight portion 21b provided on the other first friction plate 2B side. That is, in the two adjacent first friction plates 2A and 2B, the leaf spring structure portion 21a and the straight portion 21b are provided at locations having the same phase in the circumferential direction and are opposed in the axial direction. In short, in the relative relationship between the two adjacent first friction plates 2A and 2B, it is only necessary that the straight portion 21b is provided at the tip of the leaf spring structure portion 21a.

多板クラッチ１が係合している状態では、板バネ構造部２１ａがストレート部２１ｂに接触して、隣接する二枚の第１摩擦板２Ａ，２Ｂの間で離れようとする方向の荷重を生じる。これにより、多板クラッチ１において、摩擦係合している第１摩擦板２と第２摩擦板３とを開放させる方向に荷重が生じることになる。   In a state where the multi-plate clutch 1 is engaged, the leaf spring structure portion 21a comes into contact with the straight portion 21b and a load in a direction to leave between the two adjacent first friction plates 2A and 2B. Arise. As a result, in the multi-plate clutch 1, a load is generated in a direction in which the first friction plate 2 and the second friction plate 3 that are frictionally engaged are opened.

以上説明した通り、本実施形態によれば、第１摩擦板のスプライン部が板バネ構造部を有するので、複数の摩擦板によって多板クラッチを開放することができる。従来構成のようにリターンスプリングを設けなくてもよくなる。よって、摩擦板を開放するためのリターンスプリングを削減することができ、トランスミッションに搭載した場合に軽量化と小型化を図れる。また、第１摩擦板と第２摩擦板との間隔を確保できるので、湿式の多板クラッチの場合、潤滑油による引き摺り損失を抑制できる。   As described above, according to this embodiment, since the spline portion of the first friction plate has the leaf spring structure portion, the multi-plate clutch can be released by the plurality of friction plates. It is not necessary to provide a return spring as in the conventional configuration. Therefore, the return spring for opening the friction plate can be reduced, and when mounted on the transmission, the weight can be reduced and the size can be reduced. Moreover, since the space | interval of a 1st friction board and a 2nd friction board can be ensured, in the case of a wet multi-plate clutch, the drag loss by lubricating oil can be suppressed.

なお、第１摩擦板２の板バネ構造部２１ａは、上述した実施形態の形状に限定されない。その板バネ構造の変形例を図３に示す。図３（ａ）に示すように、軸線方向から見た場合、板バネ構造部２１ａは、全体が略Ｌ字型に曲がった形状（いわゆる片持ち梁状）に形成されてもよい。図３（ａ），（ｂ）に示すように、その板バネ構造部２１ａは、摩擦部から径方向に沿って延びている部分ストレート部２１１と、摩擦部よりも軸線方向に突出し、かつ円周方向に沿って延びている支持部２１２と、隣接する第１摩擦板２のスプライン凸部２１に面接触する押圧部２１３とが一体構造に構成されている。支持部２１２は、部分ストレート部２１１から押圧部２１３に至る部分であって、軸線方向に対して傾斜している。   In addition, the leaf | plate spring structure part 21a of the 1st friction board 2 is not limited to the shape of embodiment mentioned above. A modification of the leaf spring structure is shown in FIG. As shown in FIG. 3A, when viewed from the axial direction, the leaf spring structure 21a may be formed in a shape that is bent in a substantially L shape (so-called cantilever shape). As shown in FIGS. 3A and 3B, the leaf spring structure portion 21a includes a partial straight portion 211 extending in the radial direction from the friction portion, an axial direction projecting from the friction portion, and a circular shape. A support portion 212 extending along the circumferential direction and a pressing portion 213 in surface contact with the spline convex portion 21 of the adjacent first friction plate 2 are configured in an integrated structure. The support part 212 is a part from the partial straight part 211 to the pressing part 213, and is inclined with respect to the axial direction.

また、第２摩擦板３の内径側スプライン部３０が板バネ構造に形成されてもよい。その変形例を図４に示す。図４に示すように、第２摩擦板３の内径側スプライン部３０は、板バネ構造部３１ａとストレート部３１ｂとを含むスプライン凸部３１を有する。この場合の板バネ構造部３１ａの形状は、上述した図２（ｂ）に示す形状や、図３（ａ），（ｂ）に示す形状であってよい。また、複数の第２摩擦板３のうち隣接する二枚の第２摩擦板３，３において、板バネ構造部３１ａが突出している先にストレート部３１ｂが設けられていればよい。そして、多板クラッチ１が係合している状態では、第２摩擦板３において、板バネ構造部３１ａがストレート部３１ｂに接触して、隣り合う摩擦板３，３の間で離れようとする方向の荷重を生じる。   Further, the inner diameter side spline portion 30 of the second friction plate 3 may be formed in a leaf spring structure. The modification is shown in FIG. As shown in FIG. 4, the inner diameter side spline portion 30 of the second friction plate 3 has a spline convex portion 31 including a leaf spring structure portion 31a and a straight portion 31b. The shape of the leaf spring structure 31a in this case may be the shape shown in FIG. 2B described above or the shapes shown in FIGS. 3A and 3B. Moreover, in the two adjacent 2nd friction plates 3 and 3 among the some 2nd friction plates 3, the straight part 31b should just be provided in the tip which the leaf | plate spring structure part 31a protrudes. In the state in which the multi-plate clutch 1 is engaged, in the second friction plate 3, the leaf spring structure portion 31a comes into contact with the straight portion 31b and tends to be separated between the adjacent friction plates 3 and 3. This creates a directional load.

１ 多板クラッチ
２ 第１摩擦板
３ 第２摩擦板
４ クラッチドラム
５ クラッチハブ
６ 嵌合部分
２０ 外径側スプライン部
２１ 径方向凸部（スプライン凸部）
２１ａ 板バネ構造部（第１スプライン凸部）
２１ｂ ストレート部（第２スプライン凸部）
２２ 径方向凹部（スプライン凹部）
３０ 内径側スプライン部 DESCRIPTION OF SYMBOLS 1 Multiplate clutch 2 1st friction plate 3 2nd friction plate 4 Clutch drum 5 Clutch hub 6 Fitting part 20 Outer diameter side spline part 21 Radial direction convex part (spline convex part)
21a Leaf spring structure (first spline projection)
21b Straight part (2nd spline convex part)
22 radial recess (spline recess)
30 Inner side spline

Claims (1)

クラッチドラムに外径側スプライン部が嵌合している複数の第１摩擦板と、クラッチハブに内径側スプライン部が嵌合している複数の第２摩擦板とを備え、前記第１摩擦板と前記第２摩擦板とが係合もしくは開放する多板クラッチにおいて、
前記外径側または内径側スプライン部は、前記第１または第２摩擦板と一体構造、かつ隣接する前記第１または第２摩擦板側へ向けて突出するように傾けられた板バネ構造の第１スプライン凸部と、径方向に沿って延びている第２スプライン凸部とを含み、
前記隣接する第１摩擦板同士または前記隣接する第２摩擦板同士で、前記第１スプライン凸部と前記第２スプライン凸部とが接触することによって、係合している前記第１摩擦板と前記第２摩擦板とを開放させる方向に荷重を生じる
ことを特徴とする多板クラッチ。 A plurality of first friction plates with outer diameter side spline portions fitted to the clutch drum; and a plurality of second friction plates with inner diameter side spline portions fitted to the clutch hub; In the multi-plate clutch in which the second friction plate is engaged or released,
The outer-diameter side or inner-diameter side spline portion has a plate spring structure that is integral with the first or second friction plate and is inclined so as to protrude toward the adjacent first or second friction plate. Including one spline convex portion and a second spline convex portion extending along the radial direction,
The first friction plates engaged with each other by contacting the first spline convex portion and the second spline convex portion between the adjacent first friction plates or the adjacent second friction plates. A multi-plate clutch, wherein a load is generated in a direction to open the second friction plate.
JP2015162695A 2015-08-20 2015-08-20 Multiple-plate clutch Pending JP2017040310A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003004065A (en) * 2001-06-19 2003-01-08 Fuji Heavy Ind Ltd Friction engaging device
WO2007055620A1 (en) * 2005-11-09 2007-05-18 Volvo Construction Equipment Holding Sweden Ab A brake disc unit as well as an automatic transmission and a vehicle comprising such a brake disc unit
DE102007038155A1 (en) * 2007-08-13 2009-02-19 Magna Powertrain Ag & Co Kg Multi-disk clutch for use with transfer gear-box, has multi-disks of multi-disk units pressed together for transmission of torque in one direction and are detached from each other for removal of torque transmission in other direction
US20140291107A1 (en) * 2014-06-12 2014-10-02 Caterpillar Inc. Clutch plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003004065A (en) * 2001-06-19 2003-01-08 Fuji Heavy Ind Ltd Friction engaging device
WO2007055620A1 (en) * 2005-11-09 2007-05-18 Volvo Construction Equipment Holding Sweden Ab A brake disc unit as well as an automatic transmission and a vehicle comprising such a brake disc unit
DE102007038155A1 (en) * 2007-08-13 2009-02-19 Magna Powertrain Ag & Co Kg Multi-disk clutch for use with transfer gear-box, has multi-disks of multi-disk units pressed together for transmission of torque in one direction and are detached from each other for removal of torque transmission in other direction
US20140291107A1 (en) * 2014-06-12 2014-10-02 Caterpillar Inc. Clutch plate

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