JP2020101271A - Automatic transmission - Google Patents

Automatic transmission Download PDF

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JP2020101271A
JP2020101271A JP2018241628A JP2018241628A JP2020101271A JP 2020101271 A JP2020101271 A JP 2020101271A JP 2018241628 A JP2018241628 A JP 2018241628A JP 2018241628 A JP2018241628 A JP 2018241628A JP 2020101271 A JP2020101271 A JP 2020101271A
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hub member
oil passage
cylindrical portion
fastening
hydraulic chamber
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JP6958539B2 (en
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將太 山川
Shota Yamakawa
將太 山川
友隆 石坂
Tomotaka Ishizaka
友隆 石坂
龍彦 岩▲崎▼
Tatsuhiko Iwasaki
龍彦 岩▲崎▼
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Mazda Motor Corp
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Mazda Motor Corp
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Abstract

To restrict the rotation of a hub member with which friction plates are spline-engaged, and to efficiently supply hydraulic fluid for lubrication from a valve body to the friction plates.SOLUTION: An automatic transmission 10 comprises a brake BR2 in which friction plates 70 are arranged between a hub member 20 and a drum member 60. The hub member 20 comprises: a first hub member 21 having a cylindrical part 23 comprising a spline portion 25 with which the friction plates 70 are spline-engaged, and spline-engaged with a transmission case 11; a second hub member 31 fitted to the transmission case 11; and a third hub member 41 having a cylindrical part 43. A supply oil path L1 for lubrication comprises: a radial oil path in the second hub member 31; an annular peripheral oil path 132 between the cylindrical part 23 of the first hub member 21 and the cylindrical part 43 of the third hub member 41; and a supply port 133 in the cylindrical part 23 of the first hub member 21.SELECTED DRAWING: Figure 3

Description

本発明は、車両に搭載される自動変速機に関し、車両用の自動変速機の技術分野に属する。 The present invention relates to an automatic transmission mounted on a vehicle, and belongs to the technical field of automatic transmissions for vehicles.

車両に搭載される自動変速機として、エンジンなどの駆動源に連結されたトルクコンバータなどの流体伝動装置と、流体伝動装置に連結されると共に複数のプラネタリギヤセット(遊星歯車機構)及びクラッチやブレーキなどの複数の摩擦締結要素を備えた変速機構とを有し、油圧制御によって複数の摩擦締結要素を選択的に締結して減速比の異なる複数の変速段を達成するようにしたものが一般に知られている。 As an automatic transmission mounted on a vehicle, a fluid transmission device such as a torque converter connected to a drive source such as an engine, and a plurality of planetary gear sets (planetary gear mechanism) and clutches and brakes connected to the fluid transmission device. It is generally known to have a speed change mechanism including a plurality of friction engagement elements, and to selectively engage a plurality of friction engagement elements by hydraulic control so as to achieve a plurality of speed stages having different reduction ratios. ing.

近年、自動変速機の多段化や軽量化要求等に応じて流体伝動装置を廃止する傾向がある。この場合、発進時に1速の変速段で締結される少なくとも1つの摩擦締結要素をスリップ制御することによりエンジンストールを回避しながら円滑な発進を実現することが考えられる。 In recent years, there has been a tendency to discontinue the fluid transmission device in response to the demand for multi-stage automatic transmissions and weight reduction. In this case, it is conceivable to realize a smooth start while avoiding engine stall by performing slip control on at least one frictional engagement element that is engaged at the first speed when starting.

発進時に1速の変速段で締結される摩擦締結要素をスリップ制御する場合、油圧室が回転するクラッチに比べて油圧室が回転しないブレーキの方が締結時の制御性が良いことから、発進時に1速の変速段で締結されるブレーキをスリップ制御することが考えられる。 When performing the slip control of the friction engagement element that is engaged at the first speed when starting, the brake that does not rotate the hydraulic chamber has better controllability during engagement than the clutch that rotates the hydraulic chamber. It is conceivable to perform slip control on the brake that is engaged at the first speed.

このように構成された自動変速機では、発進時に1速の変速段で締結されるブレーキは、スリップ制御の実施頻度が多くなることから、所要の耐久性を維持するためにスリップ制御による摩擦板の発熱を効果的に抑制する必要がある。 In the automatic transmission configured as described above, since the brake that is engaged at the first speed shift stage at the time of starting increases the frequency of the slip control, the friction plate by the slip control is required to maintain the required durability. It is necessary to effectively suppress the heat generation.

摩擦板の発熱を抑制するために、摩擦板に供給する潤滑用の作動油の量を多くして冷却性能を高めることが考えられるが、変速機ケースの内周面と変速機ケース内に収納された所定の回転部材の外周面との間に複数の摩擦板が配置されたブレーキでは、変速機ケースの内周面付近に潤滑用の作動油が滞留して摩擦板間に引き摺り抵抗が生じて回転抵抗を増大させるおそれがある。 In order to suppress heat generation of the friction plate, it is possible to increase the amount of lubricating oil supplied to the friction plate to improve the cooling performance, but it is stored inside the transmission case and inside the transmission case. In a brake in which a plurality of friction plates are arranged between the outer peripheral surface of a predetermined rotating member, lubricating oil is retained near the inner peripheral surface of the transmission case and drag resistance occurs between the friction plates. There is a risk of increasing the rotation resistance.

これに対し、例えば特許文献1には、発進時にスリップ制御される1速の変速段で締結されるブレーキにおいて、変速機ケースに結合されたハブ部材の外周面と所定の回転部材に結合されたドラム部材の内周面との間に複数の摩擦板を配置するようにしたものが開示されている。 On the other hand, for example, in Patent Document 1, in a brake that is engaged at a first speed gear position where slip control is performed at the time of starting, the outer peripheral surface of a hub member connected to a transmission case and a predetermined rotating member are connected. It is disclosed that a plurality of friction plates are arranged between the drum member and the inner peripheral surface thereof.

図17は、従来の自動変速機のブレーキを示す断面図である。図17に示すように、このブレーキ200は、変速機ケース201に結合されたハブ部材202と、所定の回転部材203に結合されたドラム部材204と、ハブ部材202とドラム部材204との間に配置された複数の摩擦板205と、複数の摩擦板205を締結するピストン206とを有している。 FIG. 17 is a sectional view showing a brake of a conventional automatic transmission. As shown in FIG. 17, this brake 200 includes a hub member 202 connected to a transmission case 201, a drum member 204 connected to a predetermined rotating member 203, and a hub member 202 and a drum member 204. It has a plurality of arranged friction plates 205 and a piston 206 that fastens the plurality of friction plates 205.

ブレーキ200では、潤滑用供給油路207は、矢印208で示すように、変速機ケース201から変速機ケース201に結合された連結部材209内を通じて径方向内側に延び、ハブ部材202の外周面に形成されたスプライン部210を通じて軸方向一方側から軸方向他方側に延び、複数の摩擦板205に潤滑用の作動油を供給するようになっている。 In the brake 200, the lubrication supply oil passage 207 extends radially inward from the transmission case 201 through the coupling member 209 coupled to the transmission case 201, as shown by the arrow 208, and extends on the outer peripheral surface of the hub member 202. Through the formed spline portion 210, it extends from one side in the axial direction to the other side in the axial direction, and supplies the hydraulic oil for lubrication to the plurality of friction plates 205.

潤滑用の作動油は、ドラム部材204にスプライン係合された摩擦板205の遠心力を受けて、矢印211で示すように、径方向外側に移動して摩擦板205間に供給され、スリップ制御による摩擦板205の発熱を冷却するようになっている。そして、ドラム部材204の内周面に移動した潤滑用の作動油は、ドラム部材204の回転によって、矢印212で示すように軸方向外側に移動して滞留することを抑制するようになっている。 The lubricating hydraulic oil receives the centrifugal force of the friction plate 205 spline-engaged with the drum member 204, moves radially outward as shown by an arrow 211, and is supplied between the friction plates 205 to perform slip control. The heat generated by the friction plate 205 is cooled. The lubricating hydraulic oil that has moved to the inner peripheral surface of the drum member 204 is prevented from moving axially outward as shown by arrow 212 and staying due to the rotation of the drum member 204. ..

特開2016−90048号公報JP, 2016-90048, A

前記特許文献1に記載されるブレーキでは、図17に示すように、潤滑用の作動油はハブ部材202の外周面に形成されたスプライン部210を通じて軸方向一方側から軸方向他方側に移動されることから、摩擦板205に達する前に、矢印213で示すように径方向外側に流出して摩擦板205の冷却効率の低下を引き起こし得る。 In the brake described in Patent Document 1, as shown in FIG. 17, the hydraulic oil for lubrication is moved from one axial side to the other axial side through a spline portion 210 formed on the outer peripheral surface of the hub member 202. Therefore, before reaching the friction plate 205, it may flow outward in the radial direction as indicated by an arrow 213 to cause a reduction in cooling efficiency of the friction plate 205.

これに対し、ハブ部材内に、潤滑用供給油路を軸方向に延びるように形成すると共に摩擦板が配置される部分及び連結部材が配置される部分にそれぞれ供給口及び導入口を設けることで、潤滑用の作動油を摩擦板に効率良く供給して摩擦板の冷却効率を向上させることができる。 On the other hand, in the hub member, the lubricating oil passage is formed so as to extend in the axial direction, and the supply port and the introduction port are provided at the portion where the friction plate is arranged and the portion where the connecting member is arranged, respectively. The lubricating oil can be efficiently supplied to the friction plate to improve the cooling efficiency of the friction plate.

変速機ケースに結合されるハブ部材と所定の回転部材に結合されるドラム部材との間に複数の摩擦板が配置されたブレーキを備えた自動変速機において、ハブ部材内に潤滑用供給油路を形成してハブ部材側から潤滑用作動油を供給する場合、摩擦板がスプライン係合されると共に潤滑用供給油路を有するハブ部材を変速機ケースに如何に結合させるかが問題となる。 In an automatic transmission equipped with a brake in which a plurality of friction plates are arranged between a hub member connected to a transmission case and a drum member connected to a predetermined rotating member, a lubricating oil supply passage in the hub member. When the lubricating oil is supplied from the hub member side by forming the above, there is a problem in how the friction plate is spline-engaged and the hub member having the lubricating oil passage is connected to the transmission case.

摩擦板がスプライン係合されるスプライン部を有するハブ部材は、ブレーキの締結時に摩擦板から入力される力を受け止めて回り止めを行うように変速機ケースに結合する必要があることから、変速機ケースにスプライン係合させることが考えられる。 The hub member having the spline portion with which the friction plate is spline-engaged needs to be coupled to the transmission case so as to receive the force input from the friction plate at the time of engaging the brake and stop the rotation. It is conceivable to make spline engagement with the case.

しかしながら、ハブ部材と変速機ケースとをスプライン係合させる場合にはハブ部材と変速機ケースとの結合部に変速機ケースの周方向にガタが生じてハブ部材と変速機ケースの下方に配設されるバルブボディとの接続部についても変速機ケースの周方向にガタが生じ、バルブボディから摩擦板に潤滑用の作動油を効率良く供給することが困難になり得る。 However, when the hub member and the transmission case are spline-engaged with each other, a rattling occurs in the connecting portion between the hub member and the transmission case in the circumferential direction of the transmission case, and the hub member and the transmission case are arranged below the transmission case. Also in the connection portion with the valve body that is formed, backlash may occur in the circumferential direction of the transmission case, and it may be difficult to efficiently supply lubricating oil from the valve body to the friction plate.

これに対し、摩擦板がスプライン係合されるハブ部材を、バルブボディから摩擦板に潤滑用の作動油を効率良く供給することができるように変速機ケースに圧入して嵌合させることが考えられるが、かかる場合、ブレーキの締結時に摩擦板から入力される力を受け止めて回り止めを行うことができないおそれがある。 On the other hand, it is considered that the hub member with which the friction plate is spline-engaged is press-fitted and fitted into the transmission case so that the lubricating oil can be efficiently supplied from the valve body to the friction plate. However, in such a case, there is a possibility that the force input from the friction plate at the time of engaging the brake cannot be received to prevent the rotation.

そこで、本発明は、ハブ部材とドラム部材との間に複数の摩擦板が配置されたブレーキを備えた自動変速機において、摩擦板がスプライン係合されるハブ部材の回り止めを行うと共にバルブボディから摩擦板に潤滑用の作動油を効率良く供給することを課題とする。 Therefore, the present invention, in an automatic transmission including a brake in which a plurality of friction plates are arranged between a hub member and a drum member, prevents the hub member in which the friction plates are spline-engaged from rotating and also prevents the valve body from rotating. It is an object to efficiently supply lubricating oil to the friction plate.

前記課題を解決するため、本発明は、次のように構成したことを特徴とする。 In order to solve the above-mentioned subject, the present invention is constituted as follows.

まず、本願の請求項1に記載の発明は、変速機ケースに結合されるハブ部材と、所定の回転部材に結合されるドラム部材と、前記ハブ部材と前記ドラム部材との間に配置される複数の摩擦板と、前記複数の摩擦板を締結するピストンとを有するブレーキを備えた自動変速機であって、前記ハブ部材は、前記摩擦板がスプライン係合されるスプライン部を備えた円筒部を有すると共に前記変速機ケースにスプライン係合される第1ハブ部材と、前記第1ハブ部材の軸方向一方側に配置されると共に前記摩擦板に潤滑用の作動油を供給する潤滑用供給油路を形成し、且つ前記変速機ケースの下方に配設されるバルブボディに接続されるように前記変速機ケースに嵌合される第2ハブ部材と、前記第1ハブ部材の径方向内側において前記第2ハブ部材の軸方向他方側に結合されると共に、前記第1ハブ部材の円筒部の径方向内側に設けられて前記第1ハブ部材の円筒部との間に前記潤滑用供給油路を形成する円筒部を有する第3ハブ部材とを備え、前記潤滑用供給油路は、前記第2ハブ部材に設けられて径方向に延びる潤滑用径方向油路と、前記第2ハブ部材の潤滑用径方向油路に接続されて前記第1ハブ部材の円筒部と前記第3ハブ部材の円筒部との間に周方向に環状に設けられる潤滑用周方向油路と、前記第1ハブ部材の円筒部に設けられて前記摩擦板に潤滑用の作動油を供給する供給口とを備えていることを特徴とする。 First, the invention according to claim 1 of the present application is arranged between a hub member coupled to a transmission case, a drum member coupled to a predetermined rotating member, and the hub member and the drum member. An automatic transmission including a brake having a plurality of friction plates and a piston that fastens the plurality of friction plates, wherein the hub member includes a cylindrical portion having a spline portion with which the friction plates are spline-engaged. And a first hub member that is spline-engaged with the transmission case, and a lubricating supply oil that is disposed on one axial side of the first hub member and that supplies lubricating oil to the friction plate. A second hub member that forms a passage and is fitted to the transmission case so as to be connected to a valve body that is disposed below the transmission case; and a second hub member on a radially inner side of the first hub member. The lubrication supply oil passage is coupled to the other side of the second hub member in the axial direction and is provided inside the cylindrical portion of the first hub member in the radial direction, and is provided between the second hub member and the cylindrical portion of the first hub member. And a third hub member having a cylindrical portion forming a cylinder, and the lubricating supply oil passage is provided in the second hub member and extends in the radial direction for lubrication. A circumferential oil passage for lubrication, which is connected to a radial oil passage for lubrication and is annularly provided in the circumferential direction between the cylindrical portion of the first hub member and the cylindrical portion of the third hub member, and the first hub. And a supply port that is provided in the cylindrical portion of the member to supply the friction plate with hydraulic oil for lubrication.

また、請求項2に記載の発明は、前記請求項1に記載の発明において、前記第1ハブ部材の円筒部は、前記スプライン部を備えて外周側に配置される外側円筒部と、内周側に配置されて前記潤滑用供給油路を形成する内側円筒部とを備え、前記内側円筒部に、前記供給口が設けられ、前記外側円筒部に、前記供給口に対応して切り欠かれた潤滑用切欠部が形成されていることを特徴とする。 In the invention according to claim 2, in the invention according to claim 1, the cylindrical portion of the first hub member includes an outer cylindrical portion including the spline portion and arranged on an outer peripheral side, and an inner peripheral portion. And an inner cylindrical portion that is disposed on a side to form the lubricating supply oil passage, the inner cylindrical portion is provided with the supply port, and the outer cylindrical portion is cut out corresponding to the supply port. And a notch for lubrication is formed.

また、請求項3に記載の発明は、前記請求項1又は請求項2に記載の発明において、前記ピストンを締結方向に付勢する付勢部材と、前記ピストンを締結方向に付勢する作動油が供給される締結用油圧室と、前記ピストンを解放方向に付勢する作動油が供給される解放用油圧室と、を備え、前記締結用油圧室及び前記解放用油圧室は、前記複数の摩擦板の径方向内側に配置され、前記付勢部材は、前記締結用油圧室及び前記解放用油圧室と径方向にオーバーラップする位置に配置されていることを特徴とする。 The invention according to claim 3 is the invention according to claim 1 or 2, wherein the biasing member biases the piston in the fastening direction, and the hydraulic oil biases the piston in the fastening direction. And a releasing hydraulic chamber to which hydraulic oil for urging the piston in the releasing direction is supplied, wherein the engaging hydraulic chamber and the releasing hydraulic chamber are the plurality of The urging member is arranged radially inside the friction plate, and the urging member is arranged at a position that radially overlaps with the fastening hydraulic chamber and the releasing hydraulic chamber.

また、請求項4に記載の発明は、前記請求項1から請求項3の何れか1項に記載の発明において、前記ピストンを締結方向に付勢する作動油が供給される締結用油圧室と、前記締結用油圧室に締結用の作動油を供給する締結用供給油路とを備え、前記締結用供給油路は、前記第2ハブ部材に設けられて径方向に延びる締結用径方向油路と、前記第3ハブ部材に設けられて前記第2ハブ部材の締結用径方向油路に接続されて軸方向に延びると共に前記締結用油圧室に接続される締結用軸方向油路とを備えていることを特徴とする。 Further, an invention according to a fourth aspect is the invention according to any one of the first to third aspects, in which a hydraulic oil chamber for fastening is supplied with hydraulic fluid for urging the piston in a fastening direction. And a fastening supply oil passage for supplying the fastening hydraulic oil to the fastening hydraulic chamber, the fastening supply oil passage being provided in the second hub member and extending in the radial direction for fastening. And a fastening axial oil passage that is provided in the third hub member, is connected to the fastening radial oil passage of the second hub member, extends axially, and is connected to the fastening hydraulic chamber. It is characterized by having.

また、請求項5に記載の発明は、前記請求項1から請求項4の何れか1項に記載の発明において、前記ピストンを解放方向に付勢する作動油が供給される解放用油圧室と、前記解放用油圧室に解放用の作動油を供給する解放用供給油路とを備え、前記解放用供給油路は、前記第2ハブ部材に設けられて径方向に延びる解放用径方向油路と、前記第3ハブ部材に設けられて前記第2ハブ部材の解放用径方向油路に接続されて軸方向に延びると共に前記解放用油圧室に接続される解放用軸方向油路とを備えていることを特徴とする。 Further, an invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein a hydraulic oil chamber for release is supplied with hydraulic oil for urging the piston in a releasing direction. And a release supply oil passage for supplying release hydraulic oil to the release hydraulic chamber, the release supply oil passage being provided in the second hub member and extending in a radial direction. And a release axial oil passage that is provided in the third hub member, is connected to the release radial oil passage of the second hub member, extends in the axial direction, and is connected to the release hydraulic chamber. It is characterized by having.

本願の請求項1に記載の発明によれば、ハブ部材とドラム部材との間に複数の摩擦板が配置されたブレーキを備えた自動変速機において、ハブ部材は、摩擦板がスプライン係合されるスプライン部を備えた円筒部を有して変速機ケースにスプライン係合される第1ハブ部材と、潤滑用供給油路を形成すると共にバルブボディに接続されるように変速機ケースに嵌合される第2ハブ部材と、第1ハブ部材の径方向内側において第2ハブ部材に結合されると共に、第1ハブ部材の円筒部との間に潤滑用供給油路を形成する円筒部を有する第3ハブ部材とを備える。 According to the invention described in claim 1 of the present application, in the automatic transmission including the brake in which the plurality of friction plates are arranged between the hub member and the drum member, the hub member is spline-engaged with the friction plates. A first hub member that has a cylindrical portion with a spline portion and that is spline-engaged with the transmission case, and that is fitted to the transmission case so as to form a lubricating oil supply passage and be connected to the valve body And a second hub member that is coupled to the second hub member radially inside the first hub member and that forms a lubrication supply oil passage between the second hub member and the second hub member. And a third hub member.

そして、潤滑用供給油路は、第2ハブ部材に設けられた潤滑用径方向油路と、第2ハブ部材の潤滑用径方向油路に接続されて第1ハブ部材の円筒部と第3ハブ部材の円筒部との間に環状に設けられる潤滑用周方向油路と、第1ハブ部材の円筒部に設けられる供給口とを備える。 The lubrication supply oil passage is connected to the lubrication radial oil passage provided in the second hub member and the lubrication radial oil passage in the second hub member, and is connected to the cylindrical portion of the first hub member and the third lubrication oil passage. A lubricating circumferential oil passage is provided annularly between the cylindrical portion of the hub member and a supply port provided in the cylindrical portion of the first hub member.

これにより、第1ハブ部材が変速機ケースにスプライン係合されるので、ブレーキの締結時にスプライン部を介して摩擦板から入力される力によって第1ハブ部材が変速機ケースの周方向に回転することを抑制することができ、ハブ部材の回り止めを行うことができる。 As a result, the first hub member is spline-engaged with the transmission case, so that the first hub member rotates in the circumferential direction of the transmission case by the force input from the friction plate via the spline portion when the brake is engaged. This can be suppressed, and the hub member can be prevented from rotating.

また、第2ハブ部材が変速機ケースに嵌合されるので、第2ハブ部材を変速機ケースに固定させることができ、第2ハブ部材とバルブボディとの接続部において変速機ケースの周方向のガタをなくしてバルブボディから第2ハブ部材の潤滑用供給油路に潤滑用の作動油を効率良く供給することができる。 Further, since the second hub member is fitted into the transmission case, the second hub member can be fixed to the transmission case, and the connecting portion between the second hub member and the valve body can be arranged in the circumferential direction of the transmission case. It is possible to efficiently supply the lubricating hydraulic oil from the valve body to the lubricating oil supply passage of the second hub member by eliminating the backlash.

さらに、潤滑用供給油路は、第2ハブ部材の潤滑用径方向油路と、第2ハブ部材の潤滑用径方向油路に接続されて第1ハブ部材の円筒部と第3ハブ部材の円筒部との間に環状に設けられる潤滑用周方向油路と、第1ハブ部材の円筒部に設けられる供給口とを備えるので、摩擦板に潤滑用の作動油を効率良く供給することができる。 Further, the lubrication supply oil passage is connected to the lubrication radial oil passage of the second hub member and the lubrication radial oil passage of the second hub member to connect the cylindrical portion of the first hub member and the third hub member. Since the lubricating circumferential oil passage is provided annularly between the cylindrical portion and the supply port provided in the cylindrical portion of the first hub member, the lubricating oil can be efficiently supplied to the friction plate. it can.

したがって、ハブ部材とドラム部材との間に複数の摩擦板が配置されたブレーキを備えた自動変速機において、摩擦板がスプライン係合されるハブ部材の回り止めを行うと共にバルブボディから摩擦板に潤滑用の作動油を効率良く供給することができる。 Therefore, in an automatic transmission equipped with a brake in which a plurality of friction plates are arranged between the hub member and the drum member, the hub member, which is spline-engaged with the friction plates, is prevented from rotating and the valve body is changed to the friction plates. Lubricating hydraulic oil can be efficiently supplied.

また、請求項2に記載の発明によれば、第1ハブ部材の円筒部は、スプライン部を備えた外側円筒部と潤滑用供給油路を形成する内側円筒部とを備え、外側円筒部に、内側円筒部の供給口に対応した潤滑用切欠部が形成されることにより、単一部材からなる第1ハブ部材の円筒部に供給口を穴開け加工することが困難な場合においても、第1ハブ部材の円筒部を、外側円筒部と内側円筒部とを別体で形成した後に外側円筒部と内側円筒部とを取り付けて形成することで、供給口の穴開け加工を比較的容易に行うことができ、生産性の向上を図ることができる。 Further, according to the invention described in claim 2, the cylindrical portion of the first hub member includes an outer cylindrical portion having a spline portion and an inner cylindrical portion forming a lubricating oil supply passage, and the outer cylindrical portion has By forming the notch for lubrication corresponding to the supply port of the inner cylindrical portion, even when it is difficult to form the supply port in the cylindrical portion of the first hub member made of a single member, (1) By forming the outer cylindrical portion of the hub member and the inner cylindrical portion separately from each other and then attaching the outer cylindrical portion and the inner cylindrical portion to each other, it is possible to relatively easily perform the boring process for the supply port. Therefore, the productivity can be improved.

また、請求項3に記載の発明によれば、締結用油圧室及び解放用油圧室は、複数の摩擦板の径方向内側に配置されることにより、ピストンの反摩擦板側に締結用油圧室及び解放用油圧室が配置される場合に比して、軸方向にコンパクトに構成することができる。また、付勢部材は、締結用油圧室及び解放用油圧室と径方向にオーバーラップする位置に配置されることにより、付勢部材を締結用油圧室及び解放用油圧室と径方向にオーバーラップさせない場合に比して、径方向にコンパクトに構成することができる。 Further, according to the invention described in claim 3, the fastening hydraulic chamber and the releasing hydraulic chamber are arranged radially inward of the plurality of friction plates, so that the fastening hydraulic chamber is provided on the side opposite to the friction plate of the piston. In addition, compared with the case where the hydraulic chamber for release is arranged, the structure can be made compact in the axial direction. Further, the biasing member is arranged at a position that radially overlaps the fastening hydraulic chamber and the releasing hydraulic chamber, so that the biasing member radially overlaps the fastening hydraulic chamber and the releasing hydraulic chamber. As compared with the case where it is not performed, it can be configured to be compact in the radial direction.

また、請求項4に記載の発明によれば、締結用供給油路は、第2ハブ部材に設けられる締結用径方向油路と、第3ハブ部材に設けられて第2ハブ部材の締結用径方向油路に接続されると共に締結用油圧室に接続される締結用軸方向油路とを備えることにより、変速機ケースに結合される第2ハブ部材に締結用供給油路が形成されるので、バルブボディから締結用供給油路に作動油を容易に供給することができる。 According to the invention described in claim 4, the fastening supply oil passage is provided in the second hub member, and the fastening radial oil passage is provided in the third hub member for fastening the second hub member. By providing a fastening axial oil passage connected to the radial oil passage and connected to the fastening hydraulic chamber, a fastening supply oil passage is formed in the second hub member coupled to the transmission case. Therefore, the hydraulic oil can be easily supplied from the valve body to the fastening supply oil passage.

また、請求項5に記載の発明によれば、解放用供給油路は、第2ハブ部材に設けられる解放用径方向油路と、第3ハブ部材に設けられて解放用径方向油路に接続されると共に解放用油圧室に接続される解放用軸方向油路とを備えることにより、変速機ケースに結合される第2ハブ部材に解放用供給油路が形成されるので、バルブボディから解放用供給油路に作動油を容易に供給することができる。 Further, according to the invention as set forth in claim 5, the releasing supply oil passage is provided in the releasing radial oil passage provided in the second hub member and in the releasing radial oil passage provided in the third hub member. Since the release supply oil passage is formed in the second hub member connected to the transmission case, the release oil passage is formed by including the release axial oil passage connected to the release hydraulic chamber. The hydraulic oil can be easily supplied to the release supply oil passage.

本発明の実施形態に係る自動変速機の骨子図である。1 is a skeleton diagram of an automatic transmission according to an embodiment of the present invention. 自動変速機の摩擦締結要素の締結表である。It is an engagement table of the friction engagement element of an automatic transmission. 自動変速機のブレーキ及びその周辺の断面図である。It is a sectional view of a brake of an automatic transmission and its periphery. 自動変速機のブレーキ及びその周辺の別の断面図である。It is another sectional view of a brake of an automatic transmission and its periphery. 自動変速機のブレーキ及びその周辺の更に別の断面図である。FIG. 7 is another cross-sectional view of the brake of the automatic transmission and its periphery. 自動変速機のブレーキ及びその周辺の更に別の断面図である。FIG. 7 is another cross-sectional view of the brake of the automatic transmission and its periphery. ブレーキのハブ部材及びピストンの組付状態を示す斜視図である。It is a perspective view showing an assembled state of a hub member and a piston of a brake. ブレーキの第1ハブ部材、第2ハブ部材及び第3ハブ部材の組付状態を示す斜視図である。It is a perspective view showing an assembled state of the 1st hub member, the 2nd hub member, and the 3rd hub member of a brake. ブレーキの第1ハブ部材及び第2ハブ部材の組付状態を示す斜視図である。It is a perspective view showing the assembled state of the 1st hub member and the 2nd hub member of a brake. 第1ハブ部材を示す斜視図である。It is a perspective view showing the 1st hub member. 第2ハブ部材を示す斜視図である。It is a perspective view showing the 2nd hub member. ブレーキのハブ部材及びピストンの組付状態を示す別の斜視図である。It is another perspective view showing the assembled state of the hub member and the piston of the brake. 第3ハブ部材を示す斜視図である。It is a perspective view showing a 3rd hub member. ブレーキのハブ部材及びピストンの要部を示す正面図である。It is a front view which shows the hub part of a brake, and the principal part of a piston. 解放状態、ゼロクリアランス状態及び締結状態にあるブレーキを示す断面図である。It is sectional drawing which shows the brake in a release state, a zero clearance state, and a fastening state. 本発明の実施形態に係るブレーキの第1ハブ部材の変形例の斜視図である。It is a perspective view of the modification of the 1st hub member of the brake concerning the embodiment of the present invention. 従来の自動変速機のブレーキを示す断面図である。It is sectional drawing which shows the brake of the conventional automatic transmission.

以下、本発明の実施形態について添付図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図1は、本発明の実施形態に係る自動変速機の骨子図である。この自動変速機10は、エンジンなどの駆動源にトルクコンバータなどの流体伝動装置を介することなく連結されている。自動変速機10は、変速機ケース11内に、駆動源に連結されて駆動源側(図の左側)に配設された入力軸12と、反駆動源側(図の右側)に配設された出力軸13とを有している。自動変速機10は、入力軸12と出力軸13とが同一軸線上に配置されたフロントエンジン・リヤドライブ車用等の縦置き式のものである。 FIG. 1 is a skeleton diagram of an automatic transmission according to an embodiment of the present invention. The automatic transmission 10 is connected to a drive source such as an engine without a fluid transmission device such as a torque converter. The automatic transmission 10 is provided in a transmission case 11 with an input shaft 12 connected to a drive source and disposed on the drive source side (left side in the figure), and an input shaft 12 on the side opposite to the drive source (right side in the figure). Output shaft 13. The automatic transmission 10 is of a vertically installed type such as for a front engine/rear drive vehicle in which an input shaft 12 and an output shaft 13 are arranged on the same axis.

入力軸12及び出力軸13の軸心上には、駆動源側から、第1、第2、第3、第4プラネタリギヤセット(以下、単に「第1、第2、第3、第4ギヤセット」という)PG1、PG2、PG3、PG4が配設されている。 The first, second, third, and fourth planetary gear sets (hereinafter simply referred to as "first, second, third, fourth gear set") are arranged on the axes of the input shaft 12 and the output shaft 13 from the drive source side. PG1, PG2, PG3, PG4 are arranged.

変速機ケース11内において、第1ギヤセットPG1の駆動源側に第1クラッチCL1が配設され、第1クラッチCL1の駆動源側に第2クラッチCL2が配設され、第2クラッチCL2の駆動源側に第3クラッチCL3が配設されている。また、第3クラッチCL3の駆動源側に第1ブレーキBR1が配設され、第3ギヤセットPG3の駆動源側且つ第2ギヤセットPG2の反駆動源側に第2ブレーキBR2が配設されている。 In the transmission case 11, the first clutch CL1 is disposed on the drive source side of the first gear set PG1, the second clutch CL2 is disposed on the drive source side of the first clutch CL1, and the drive source of the second clutch CL2. The third clutch CL3 is disposed on the side. Further, the first brake BR1 is provided on the drive source side of the third clutch CL3, and the second brake BR2 is provided on the drive source side of the third gear set PG3 and on the opposite drive source side of the second gear set PG2.

第1、第2、第3、第4ギヤセットPG1、PG2、PG3、PG4は、いずれも、キャリヤに支持されたピニオンがサンギヤとリングギヤに直接噛合するシングルピニオン型である。第1、第2、第3、第4ギヤセットPG1、PG2、PG3、PG4はそれぞれ、回転要素として、サンギヤS1、S2、S3、S4と、リングギヤR1、R2、R3、R4と、キャリヤC1、C2、C3、C4とを有している。 Each of the first, second, third, and fourth gear sets PG1, PG2, PG3, PG4 is a single pinion type in which the pinion supported by the carrier directly meshes with the sun gear and the ring gear. The first, second, third, and fourth gear sets PG1, PG2, PG3, and PG4 are sun gears S1, S2, S3, S4, ring gears R1, R2, R3, R4, and carriers C1, C2, respectively, as rotating elements. , C3, and C4.

第1ギヤセットPG1は、サンギヤS1が軸方向に2分割されたダブルサンギヤ型である。サンギヤS1は、駆動源側に配置された第1サンギヤS1aと、反駆動源側に配置された第2サンギヤS1bとを有している。第1及び第2サンギヤS1a、S1bは、同一歯数を有し、キャリヤC1に支持された同一ピニオンに噛合する。これにより、第1及び第2サンギヤS1a、S1bは、常に同一回転する。 The first gear set PG1 is a double sun gear type in which the sun gear S1 is axially divided into two parts. The sun gear S1 has a first sun gear S1a arranged on the drive source side and a second sun gear S1b arranged on the opposite drive source side. The first and second sun gears S1a and S1b have the same number of teeth and mesh with the same pinion supported by the carrier C1. As a result, the first and second sun gears S1a and S1b always rotate in the same direction.

自動変速機10では、第1ギヤセットPG1のサンギヤS1、具体的には第2サンギヤS1bと第4ギヤセットPG4のサンギヤS4とが常時連結され、第1ギヤセットPG1のリングギヤR1と第2ギヤセットPG2のサンギヤS2とが常時連結され、第2ギヤセットPG2のキャリヤC2と第4ギヤセットPG4のキャリヤC4とが常時連結され、第3ギヤセットPG3のキャリヤC3と第4ギヤセットPG4のリングギヤR4とが常時連結されている。 In the automatic transmission 10, the sun gear S1 of the first gear set PG1, specifically, the second sun gear S1b and the sun gear S4 of the fourth gear set PG4 are always connected, and the ring gear R1 of the first gear set PG1 and the sun gear of the second gear set PG2 are connected. S2 is always connected, the carrier C2 of the second gear set PG2 and the carrier C4 of the fourth gear set PG4 are always connected, and the carrier C3 of the third gear set PG3 and the ring gear R4 of the fourth gear set PG4 are always connected. ..

入力軸12は、第1ギヤセットPG1のキャリヤC1に第1サンギヤS1a及び第2サンギヤS1bの間を通じて常時連結され、出力軸13は、第4ギヤセットPG4のキャリヤC4に常時連結されている。 The input shaft 12 is always connected to the carrier C1 of the first gear set PG1 through the first sun gear S1a and the second sun gear S1b, and the output shaft 13 is always connected to the carrier C4 of the fourth gear set PG4.

第1クラッチCL1は、入力軸12及び第1ギヤセットPG1のキャリヤC1と第3ギヤセットPG3のサンギヤS3との間に配設されて、これらを断接するようになっており、第2クラッチCL2は、第1ギヤセットPG1のリングギヤR1及び第2ギヤセットPG2のサンギヤS2と第3ギヤセットPG3のサンギヤS3との間に配設され、これらを断接するようになっており、第3クラッチCL3は、第2ギヤセットPG2のリングギヤR2と第3ギヤセットPG3のサンギヤS3との間に配設されて、これらを断接するようになっている。 The first clutch CL1 is arranged between the input shaft 12 and the carrier C1 of the first gear set PG1 and the sun gear S3 of the third gear set PG3 to connect and disconnect them, and the second clutch CL2 is It is arranged between the ring gear R1 of the first gear set PG1 and the sun gear S2 of the second gear set PG2 and the sun gear S3 of the third gear set PG3 to connect and disconnect them, and the third clutch CL3 is the second gear set. It is arranged between the ring gear R2 of PG2 and the sun gear S3 of the third gear set PG3 to connect and disconnect them.

第1ブレーキBR1は、変速機ケース11と第1ギヤセットPG1のサンギヤS1、具体的には第1サンギヤS1aとの間に配設されて、これらを断接するようになっており、第2ブレーキBR2は、変速機ケース11と第3ギヤセットPG3のリングギヤR3との間に配設されて、これらを断接するようになっている。 The first brake BR1 is arranged between the transmission case 11 and the sun gear S1 of the first gear set PG1, specifically, the first sun gear S1a so as to connect and disconnect them, and the second brake BR2. Is arranged between the transmission case 11 and the ring gear R3 of the third gear set PG3 to connect and disconnect them.

以上の構成により、自動変速機10は、第1クラッチCL1、第2クラッチCL2、第3クラッチCL3、第1ブレーキBR1、第2ブレーキBR2の締結状態の組み合わせにより、図2に示すように、Dレンジでの1〜8速と、Rレンジでの後退速とが形成されるようになっている。 With the above-described configuration, the automatic transmission 10 has a combination of the engagement states of the first clutch CL1, the second clutch CL2, the third clutch CL3, the first brake BR1, and the second brake BR2, as shown in FIG. The first to eighth speeds in the range and the reverse speed in the R range are formed.

自動変速機10では、発進時に1速の変速段で締結される第2ブレーキBR2がスリップ制御され、第2ブレーキBR2が本発明に係る自動変速機の摩擦締結要素に相当する。以下、このブレーキBR2について説明する。 In the automatic transmission 10, the second brake BR2, which is engaged at the first speed shift stage at the time of starting, is slip-controlled, and the second brake BR2 corresponds to the friction engagement element of the automatic transmission according to the present invention. Hereinafter, the brake BR2 will be described.

図3は、自動変速機のブレーキ及びその周辺の断面図、図4は、自動変速機のブレーキ及びその周辺の別の断面図、図5及び図6はそれぞれ、自動変速機のブレーキ及びその周辺の更に別の断面図である。図3は、図7のY3−Y3線に沿った断面に対応する自動変速機のブレーキ及びその周辺の断面を示し、図4、図5、図6はそれぞれ、図12のY4−Y4線、Y5−Y5線、Y6−Y6線に沿った断面に対応する自動変速機のブレーキ及びその周辺の断面を示している。 3 is a sectional view of the brake of the automatic transmission and its periphery, FIG. 4 is another sectional view of the brake of the automatic transmission and its periphery, and FIGS. 5 and 6 are respectively the brake of the automatic transmission and its periphery. FIG. 9 is still another cross-sectional view of FIG. FIG. 3 shows a cross section of the brake of the automatic transmission and its periphery corresponding to the cross section taken along line Y3-Y3 of FIG. 7, and FIGS. 4, 5, and 6 respectively show lines Y4-Y4 of FIG. It shows a cross section of the brake of the automatic transmission and its periphery corresponding to the cross section taken along line Y5-Y5 and line Y6-Y6.

図3から図6に示すように、ブレーキBR2は、略円筒状に形成された変速機ケース11内に収容され、第3ギヤセットPG3のサンギヤS3に連結されて第1、第2、第3クラッチCL1、CL2、CL3の内外一対の回転部材の一方が一体化された動力伝達部材14の外周側に配置されている。 As shown in FIGS. 3 to 6, the brake BR2 is housed in the transmission case 11 formed in a substantially cylindrical shape, and is connected to the sun gear S3 of the third gear set PG3 to connect the first, second, and third clutches. One of a pair of inner and outer rotary members CL1, CL2, CL3 is arranged on the outer peripheral side of the power transmission member 14 that is integrated.

動力伝達部材14は、第2ギヤセットPG2のキャリヤC2と第4ギヤセットPG4のキャリヤC4とを連結する動力伝達部材15の外周側に配置され、動力伝達部材15は、第1ギヤセットPG1のサンギヤS1、具体的には第2サンギヤS1bと第4ギヤセットPG4のサンギヤS4とを連結する動力伝達部材16の外周側に配置されている。 The power transmission member 14 is arranged on the outer peripheral side of the power transmission member 15 that connects the carrier C2 of the second gear set PG2 and the carrier C4 of the fourth gear set PG4, and the power transmission member 15 is the sun gear S1 of the first gear set PG1. Specifically, it is arranged on the outer peripheral side of the power transmission member 16 that connects the second sun gear S1b and the sun gear S4 of the fourth gear set PG4.

ブレーキBR2は、変速機ケース11に結合されるハブ部材20と、ハブ部材20の反駆動源側に配置されて第3ギヤセットPG3のリングギヤR3に結合されるドラム部材60と、ハブ部材20とドラム部材60との間に軸方向に並べて配置される複数の摩擦板70と、複数の摩擦板70の反駆動源側に配置されて複数の摩擦板70を締結するピストン80とを有している。 The brake BR2 includes a hub member 20 coupled to the transmission case 11, a drum member 60 disposed on the side opposite to the drive source of the hub member 20 and coupled to the ring gear R3 of the third gear set PG3, the hub member 20 and the drum. It has a plurality of friction plates 70 arranged side by side in the axial direction with the member 60, and a piston 80 arranged on the opposite drive source side of the plurality of friction plates 70 and fastening the plurality of friction plates 70. ..

ブレーキBR2は、摩擦板70の径方向内側にピストン80を付勢する作動油が供給される油圧室90を有している。油圧室90は、ピストン80を締結方向に付勢する締結用作動油が供給される締結用油圧室91と、ピストン80を解放方向に付勢する解放用作動油が供給される解放用油圧室92とを備えている。 The brake BR2 has a hydraulic chamber 90 radially inside the friction plate 70, to which hydraulic oil for urging the piston 80 is supplied. The hydraulic chamber 90 includes a fastening hydraulic chamber 91 to which fastening hydraulic oil for urging the piston 80 in the fastening direction is supplied, and a release hydraulic chamber to which releasing hydraulic oil for urging the piston 80 in the releasing direction is supplied. And 92.

ブレーキBR2はまた、図3に示すように、摩擦板70の径方向内側にピストン80を付勢する付勢ユニット100を有している。付勢ユニット100は、ピストン80を付勢する付勢部材としてピストン80に締結方向に付勢力を作用させるスプリング101を備えている。 As shown in FIG. 3, the brake BR2 also has a biasing unit 100 that biases the piston 80 radially inward of the friction plate 70. The urging unit 100 includes a spring 101 as a urging member for urging the piston 80, which acts on the piston 80 in the fastening direction.

図7は、ブレーキのハブ部材及びピストンの組付状態を示す斜視図、図8は、ブレーキの第1ハブ部材、第2ハブ部材及び第3ハブ部材の組付状態を示す斜視図、図9は、ブレーキの第1ハブ部材及び第2ハブ部材の組付状態を示す斜視図、図10は、第1ハブ部材を示す斜視図、図11は、第2ハブ部材を示す斜視図、図12は、ブレーキのハブ部材及びピストンの組付状態を示す別の斜視図、図13は、第3ハブ部材を示す斜視図である。 7 is a perspective view showing an assembled state of a brake hub member and a piston, FIG. 8 is a perspective view showing an assembled state of a first hub member, a second hub member and a third hub member of the brake, FIG. Is a perspective view showing an assembled state of the first hub member and the second hub member of the brake, FIG. 10 is a perspective view showing the first hub member, and FIG. 11 is a perspective view showing the second hub member. FIG. 13 is another perspective view showing an assembled state of the brake hub member and the piston, and FIG. 13 is a perspective view showing the third hub member.

図3から図13に示すように、ハブ部材20は、摩擦板70がスプライン係合されると共に変速機ケース11にスプライン係合される第1ハブ部材21と、第1ハブ部材21の駆動源側に配置されて変速機ケース11に嵌合されると共に第1ハブ部材21より径方向内側に延びる第2ハブ部材31と、第1ハブ部材21より径方向内側において第2ハブ部材31の反駆動側に結合される第3ハブ部材41と、第1ハブ部材21より径方向内側において第3ハブ部材41の反駆動源側に結合される第4ハブ部材51とを備えている。 As shown in FIGS. 3 to 13, the hub member 20 includes a first hub member 21 in which the friction plate 70 is spline-engaged and the transmission case 11 is spline-engaged, and a drive source of the first hub member 21. The second hub member 31 disposed on the side of the first hub member 21 and fitted to the transmission case 11 and extending radially inward of the first hub member 21. The third hub member 41 is connected to the drive side, and the fourth hub member 51 is connected to the non-driving source side of the third hub member 41 on the radially inner side of the first hub member 21.

第1ハブ部材21は、図3に示すように、変速機ケース11の軸方向と直交する方向に延びて略円盤状に形成された縦壁部22と、縦壁部22の径方向内側において縦壁部22から反駆動源側に略円筒状に延びる円筒部23とを備えている。 As shown in FIG. 3, the first hub member 21 includes a vertical wall portion 22 that extends in a direction orthogonal to the axial direction of the transmission case 11 and is formed in a substantially disc shape, and a radial wall inner side of the vertical wall portion 22. A cylindrical portion 23 extending from the vertical wall portion 22 to the opposite drive source side in a substantially cylindrical shape is provided.

第1ハブ部材21は、縦壁部22の外周面にスプラインが形成されたスプライン部24を有し、スプライン部24が変速機ケース11の内周面にスプラインが形成されたスプライン部11aにスプライン係合されて変速機ケース11に結合されている。 The first hub member 21 has a spline portion 24 having a spline formed on the outer peripheral surface of the vertical wall portion 22, and the spline portion 24 is splined on the spline portion 11 a having a spline formed on the inner peripheral surface of the transmission case 11. It is engaged and coupled to the transmission case 11.

第1ハブ部材21の円筒部23は、外周面にスプラインが形成されたスプライン部25を有し、スプライン部25に、摩擦板70を構成する固定側摩擦板71がスプライン係合されている。スプライン部25は、図10に示すように、スプライン部25が複数の摩擦板70の解放状態においても複数の摩擦板70にスプライン係合する所定の軸方向長さを有する第1歯部26と、第1歯部26より軸方向長さが短く形成されて複数の摩擦板70にスプライン係合する第2歯部27とを有している。第1ハブ部材21には、複数、具体的には3つの第1歯部26が周方向に略等間隔に配置されている。 The cylindrical portion 23 of the first hub member 21 has a spline portion 25 in which a spline is formed on the outer peripheral surface, and the fixed side friction plate 71 that constitutes the friction plate 70 is spline-engaged with the spline portion 25. As shown in FIG. 10, the spline portion 25 includes a first tooth portion 26 having a predetermined axial length that allows the spline portion 25 to spline-engage with the plurality of friction plates 70 even when the plurality of friction plates 70 are released. The second tooth portion 27 is formed to be shorter in the axial direction than the first tooth portion 26 and is spline-engaged with the plurality of friction plates 70. The first hub member 21 has a plurality of, specifically, three first tooth portions 26 arranged at substantially equal intervals in the circumferential direction.

第2ハブ部材31は、図3に示すように、変速機ケース11の軸方向と直交する方向に延びて略円盤状に形成された縦壁部32を備えている。第2ハブ部材31の縦壁部32には、図4に示すように、摩擦板70に潤滑用作動油を供給する潤滑用供給油路L1が形成されている。 As shown in FIG. 3, the second hub member 31 includes a vertical wall portion 32 extending in a direction orthogonal to the axial direction of the transmission case 11 and formed in a substantially disc shape. As shown in FIG. 4, the vertical wall portion 32 of the second hub member 31 is provided with a lubricating oil supply passage L1 for supplying lubricating oil to the friction plate 70.

第2ハブ部材31は、縦壁部32の外周面が第1ハブ部材21のスプライン部24の駆動源側において変速機ケース11の内周面11bに嵌合されている。第2ハブ部材31は、スナップリング17により駆動源側への抜け止めが図られると共に回り止めピン18を用いて変速機ケース11に固定され、変速機ケース11に結合されている。なお、第2ハブ部材31を変速機ケース11の内周面11bに圧入によって嵌合させて固定し、変速機ケース11に結合させるようにしてもよい。 The outer peripheral surface of the vertical wall portion 32 of the second hub member 31 is fitted to the inner peripheral surface 11 b of the transmission case 11 on the drive source side of the spline portion 24 of the first hub member 21. The second hub member 31 is prevented from coming off to the drive source side by the snap ring 17, is fixed to the transmission case 11 by using the rotation stop pin 18, and is coupled to the transmission case 11. Alternatively, the second hub member 31 may be fitted and fixed to the inner peripheral surface 11b of the transmission case 11 by press fitting, and may be coupled to the transmission case 11.

変速機ケース11の下方には、図4に示すように、ブレーキBR2の油圧室90や摩擦板70などに作動油を供給するバルブボディ5が配設されている。バルブボディ5は、変速機ケース11の下方に取り付けられたオイルパン(不図示)内に収容され、変速機ケース11に固定されている。第2ハブ部材31は、バルブボディ5に接続するためのバルブボディ接続部34を有し、変速機ケース11に形成されたケース開口部11cを通じて潤滑用供給油路L1がバルブボディ5に接続されるように形成されている。 As shown in FIG. 4, a valve body 5 that supplies hydraulic oil to the hydraulic chamber 90 of the brake BR2, the friction plate 70, and the like is disposed below the transmission case 11. The valve body 5 is housed in an oil pan (not shown) attached below the transmission case 11, and is fixed to the transmission case 11. The second hub member 31 has a valve body connecting portion 34 for connecting to the valve body 5, and the lubricating supply oil passage L1 is connected to the valve body 5 through a case opening 11c formed in the transmission case 11. Is formed.

第2ハブ部材31の縦壁部32には、図5に示すように、締結用油圧室91に締結用作動油を供給する締結用供給油路L2が形成されると共に、図6に示すように、解放用油圧室92に解放用作動油を供給する解放用供給油路L3が形成されている。 In the vertical wall portion 32 of the second hub member 31, as shown in FIG. 5, a fastening supply oil passage L2 for supplying fastening hydraulic oil to the fastening hydraulic chamber 91 is formed, and as shown in FIG. Further, a release supply oil passage L3 for supplying the release hydraulic oil to the release hydraulic chamber 92 is formed.

図11に示すように、潤滑用供給油路L1、解放用供給油路L3及び締結用供給油路L2は、変速機ケース11の下方側に周方向に並んで配置され、第2ハブ部材31は、潤滑用供給油路L1、解放用供給油路L3及び締結用供給油路L2がそれぞれバルブボディ5に接続されるように形成されている。 As shown in FIG. 11, the lubrication supply oil passage L1, the release supply oil passage L3, and the engagement supply oil passage L2 are arranged side by side in the circumferential direction on the lower side of the transmission case 11, and the second hub member 31 is provided. Is formed so that the lubricating supply oil passage L1, the releasing supply oil passage L3, and the fastening supply oil passage L2 are connected to the valve body 5, respectively.

第2ハブ部材31の縦壁部32には、図3に示すように、反駆動源側に駆動源側に窪む段差部32aが形成されている。第2ハブ部材31の段差部32aは、第2ハブ部材31の縦壁部32に第1ハブ部材21の縦壁部22が当接されたときに第1ハブ部材21の縦壁部22の内周側が係合するように形成されている。 As shown in FIG. 3, the vertical wall portion 32 of the second hub member 31 is provided with a step portion 32a which is recessed toward the drive source side on the side opposite to the drive source side. The step portion 32a of the second hub member 31 is formed on the vertical wall portion 22 of the first hub member 21 when the vertical wall portion 22 of the first hub member 21 is brought into contact with the vertical wall portion 32 of the second hub member 31. The inner peripheral side is formed to be engaged.

第2ハブ部材31の縦壁部32には、内周側に反駆動源側に略円柱状に延びる複数のボス部35が形成されている。複数のボス部35は、図9及び図11に示すように、周方向に分散して配置され、ボス部35にはそれぞれ、反駆動源側にネジ孔35aが形成されている。ボス部35のネジ孔35aに第4ハブ部材51の反駆動源側から締結ボルトB1を螺合させることにより第2ハブ部材31の反駆動源側に第3ハブ部材41及び第4ハブ部材51が結合されている。 The vertical wall portion 32 of the second hub member 31 is formed with a plurality of boss portions 35 extending in a substantially cylindrical shape on the inner peripheral side and on the side opposite to the drive source. As shown in FIGS. 9 and 11, the plurality of boss portions 35 are arranged in a dispersed manner in the circumferential direction, and each boss portion 35 is formed with a screw hole 35a on the side opposite to the drive source. The third hub member 41 and the fourth hub member 51 are attached to the anti-drive source side of the second hub member 31 by screwing the fastening bolts B1 into the screw holes 35a of the boss portion 35 from the anti-drive source side of the fourth hub member 51. Are combined.

第3ハブ部材41は、図3に示すように、変速機ケース11の軸方向と直交する方向に延びて略円盤状に形成された縦壁部42と、縦壁部42の径方向外側から反駆動源側に略円筒状に延びる第1円筒部43と、縦壁部42の径方向内側から反駆動源側に略円筒状に延びる第2円筒部44とを備え、第1円筒部43及び第2円筒部44は、略等しい軸方向長さを有するように形成されている。 As shown in FIG. 3, the third hub member 41 includes a vertical wall portion 42 extending in a direction orthogonal to the axial direction of the transmission case 11 and formed in a substantially disc shape, and a radial outside of the vertical wall portion 42. The first cylindrical portion 43 includes a first cylindrical portion 43 extending substantially in a cylindrical shape on the side opposite to the driving source, and a second cylindrical portion 44 extending substantially in a cylindrical shape from the inner side in the radial direction of the vertical wall portion 42 to the side opposite the driving source. The second cylindrical portion 44 and the second cylindrical portion 44 are formed to have substantially equal axial lengths.

第3ハブ部材41の第1円筒部43は、第1ハブ部材21の円筒部23の径方向内側に設けられている。第3ハブ部材41の第1円筒部43は、反駆動源側に第1ハブ部材21の円筒部23の内周面に当接するように径方向外側に延びるフランジ部43aを備え、第1ハブ部材21の円筒部23との間に潤滑用供給油路L1を形成するように設けられている。 The first cylindrical portion 43 of the third hub member 41 is provided inside the cylindrical portion 23 of the first hub member 21 in the radial direction. The first cylindrical portion 43 of the third hub member 41 includes a flange portion 43a that extends outward in the radial direction so as to abut the inner peripheral surface of the cylindrical portion 23 of the first hub member 21 on the side opposite to the drive source. It is provided so as to form a lubrication supply oil passage L1 between the member 21 and the cylindrical portion 23.

第3ハブ部材41の第2円筒部44は、駆動源側の外周面44aと反駆動源側の外周面44bとを有し、反駆動源側の外周面44bは、解放用油圧室92を形成するように駆動源側の外周面44aに比して径方向寸法が小さく形成されている。 The second cylindrical portion 44 of the third hub member 41 has an outer peripheral surface 44a on the drive source side and an outer peripheral surface 44b on the counter drive source side, and the outer peripheral surface 44b on the counter drive source side defines a release hydraulic chamber 92. As formed, the radial dimension is smaller than that of the outer peripheral surface 44a on the drive source side.

第3ハブ部材41の第2円筒部44にはまた、図3、図8及び図13に示すように、駆動源側から反駆動源側に略矩形状に窪んで第2ハブ部材31の複数のボス部35をそれぞれ収容する複数のボス部収容部45と、締結ボルトB1を挿通するボルト挿通穴44cとが形成されている。 As shown in FIGS. 3, 8, and 13, the second cylindrical portion 44 of the third hub member 41 also has a plurality of second hub members 31 that are recessed in a substantially rectangular shape from the drive source side to the non-drive source side. A plurality of boss portion accommodating portions 45 for accommodating the respective boss portions 35 and a bolt insertion hole 44c through which the fastening bolt B1 is inserted are formed.

第4ハブ部材51は、変速機ケース11の軸方向と直交する方向に延びて略円盤状に形成され、第3ハブ部材41の反駆動源側に配置されている。第4ハブ部材51の径方向内側には、締結ボルトB1を挿通するボルト挿通穴52が形成されている。 The fourth hub member 51 extends in a direction orthogonal to the axial direction of the transmission case 11, is formed in a substantially disc shape, and is arranged on the side opposite to the drive source of the third hub member 41. A bolt insertion hole 52 through which the fastening bolt B1 is inserted is formed on the radially inner side of the fourth hub member 51.

前述したように、第4ハブ部材51の反駆動源側から第4ハブ部材51のボルト挿通穴52及び第3ハブ部材41のボルト挿通穴44cを通じて締結ボルトB1を第2ハブ部材31のネジ孔35aに螺合させることにより、第2ハブ部材31の反駆動源側に第3ハブ部材41が結合されると共に第3ハブ部材41の反駆動源側に第4ハブ部材51が結合されている。 As described above, from the side opposite to the drive source of the fourth hub member 51, the fastening bolt B1 is screwed into the screw hole of the second hub member 31 through the bolt insertion hole 52 of the fourth hub member 51 and the bolt insertion hole 44c of the third hub member 41. The third hub member 41 is coupled to the anti-driving source side of the second hub member 31 and the fourth hub member 51 is coupled to the anti-driving source side of the third hub member 41 by being screwed into the 35 a. ..

第4ハブ部材51は、第3ハブ部材41の第2円筒部44より径方向外側に延びるように形成され、第4ハブ部材51の外周面がピストン80に嵌合されている。第4ハブ部材51の外周面には、ピストン80との嵌合部分より反駆動源側に径方向内側に断面略矩形状に窪むスナップリング用周溝54が形成され、スナップリング用周溝54に断面略矩形状に形成されたスナップリング55が装着されている。 The fourth hub member 51 is formed so as to extend radially outward from the second cylindrical portion 44 of the third hub member 41, and the outer peripheral surface of the fourth hub member 51 is fitted to the piston 80. On the outer peripheral surface of the fourth hub member 51, there is formed a snap ring circumferential groove 54 which is recessed radially inward on the side opposite to the drive source side with respect to the fitting portion with the piston 80 and has a substantially rectangular cross section. A snap ring 55 having a substantially rectangular cross-section is attached to 54.

スナップリング55は、未装着時には装着時より小径とされて略環状に形成されている。ピストン80の径方向中央側には、スナップリング55に対応して反駆動源側から駆動源側に断面略L字状に窪むスナップリング用溝部80aが形成されている。スナップリング55は、駆動源側がスナップリング用溝部80aの駆動源側の側面に当接すると共に反駆動源側がスナップリング用周溝54の反駆動源側の側面に当接したときに、ピストン80を所定の解放位置に規制するようになっている。 The snap ring 55 has a diameter smaller than that of the snap ring 55 when it is not mounted and is formed in a substantially annular shape. On the radial center side of the piston 80, there is formed a snap ring groove portion 80a corresponding to the snap ring 55 and recessed from the side opposite to the drive source to the side of the drive source in a substantially L-shaped cross section. The snap ring 55 moves the piston 80 when the drive source side abuts on the drive source side side surface of the snap ring groove portion 80a and the anti-drive source side abuts the counter drive source side side surface of the snap ring circumferential groove 54. It is designed to be restricted to a predetermined release position.

このようにして、ハブ部材20、具体的には第4ハブ部材51に、ピストン80を解放位置に規制する規制部材としてのスナップリング55が取り付けられている。スナップリング55は、ピストン80と軸方向にオーバーラップする位置に配置され、ピストン80の径方向中央側に当接するように設けられている。 In this way, the snap ring 55 as a restricting member that restricts the piston 80 to the release position is attached to the hub member 20, specifically, the fourth hub member 51. The snap ring 55 is arranged at a position where it overlaps with the piston 80 in the axial direction, and is provided so as to abut on the radial center side of the piston 80.

ハブ部材20では、第1ハブ部材21、第2ハブ部材31、第3ハブ部材41及び第4ハブ部材51がそれぞれ、アルミニウム系材料から形成されて同一材料から形成されている。 In the hub member 20, the first hub member 21, the second hub member 31, the third hub member 41, and the fourth hub member 51 are each formed of an aluminum-based material and the same material.

ドラム部材60は、第1ハブ部材21の円筒部23の外周側に対向配置されて略円筒状に軸方向に延びる円筒部61と、円筒部61の反駆動源側から径方向内側に変速機ケース11の軸方向と直交する方向に延びて略円盤状に形成された縦壁部62とを備えている。 The drum member 60 includes a cylindrical portion 61 that is arranged to face the outer peripheral side of the cylindrical portion 23 of the first hub member 21 and extends in a substantially cylindrical axial direction, and a transmission that is radially inward from the side opposite to the drive source of the cylindrical portion 61. The vertical wall portion 62 is formed in a substantially disc shape and extends in a direction orthogonal to the axial direction of the case 11.

ドラム部材60の縦壁部62は、回転部材としてのリングギヤR3に結合されている。ドラム部材60の円筒部61は、内周面にスプラインが形成されたスプライン部61aを有し、スプライン部61aに、摩擦板70を構成する回転側摩擦板72がスプライン係合されている。固定側摩擦板71と回転側摩擦板72とは、軸方向に交互に配置されている。 The vertical wall portion 62 of the drum member 60 is coupled to the ring gear R3 as a rotating member. The cylindrical portion 61 of the drum member 60 has a spline portion 61a having a spline formed on the inner peripheral surface thereof, and a rotary side friction plate 72 constituting a friction plate 70 is spline-engaged with the spline portion 61a. The stationary side friction plates 71 and the rotating side friction plates 72 are arranged alternately in the axial direction.

ピストン80は、ハブ部材20とドラム部材60との間に、具体的には第1ハブ部材21の円筒部23とドラム部材60の円筒部61との間に配置されて第3ハブ部材41の第2円筒部44の外周面に摺動自在に嵌合されている。ピストン80は、ピストン80を解放位置に規制するスナップリング55によって反駆動源側への抜け止めが図られている。 The piston 80 is disposed between the hub member 20 and the drum member 60, specifically, between the cylindrical portion 23 of the first hub member 21 and the cylindrical portion 61 of the drum member 60, and the piston 80 of the third hub member 41. The outer peripheral surface of the second cylindrical portion 44 is slidably fitted. The piston 80 is prevented from coming off to the side opposite to the drive source by a snap ring 55 that restricts the piston 80 to the release position.

ピストン80は、環状に形成され、図4に示すように、外周側に設けられて摩擦板70を押圧する押圧部81と、内周側に設けられて油圧室90を形成する油圧室形成部82と、押圧部81と油圧室形成部82とを連結する連結部83とを備えている。ピストン80の油圧室形成部82は、締結用油圧室91を形成する締結用油圧室形成部84と、解放用油圧室92を形成する解放用油圧室形成部85とを備えている。 The piston 80 is formed in an annular shape, and as shown in FIG. 4, a pressing portion 81 that is provided on the outer peripheral side and presses the friction plate 70, and a hydraulic chamber forming portion that is provided on the inner peripheral side and forms the hydraulic chamber 90. 82, and a connecting portion 83 that connects the pressing portion 81 and the hydraulic chamber forming portion 82. The hydraulic chamber forming portion 82 of the piston 80 includes a fastening hydraulic chamber forming portion 84 forming a fastening hydraulic chamber 91 and a releasing hydraulic chamber forming portion 85 forming a releasing hydraulic chamber 92.

ピストン80の押圧部81は、摩擦板70の反駆動源側に配置され、油圧室形成部82は、摩擦板70の径方向内側に配置され、連結部83は、押圧部81と油圧室形成部82とを連結するように摩擦板70の反駆動源側から摩擦板70の径方向内側に延びている。 The pressing portion 81 of the piston 80 is arranged on the side opposite to the drive source of the friction plate 70, the hydraulic chamber forming portion 82 is arranged inside of the friction plate 70 in the radial direction, and the connecting portion 83 is formed of the pressing portion 81 and the hydraulic chamber. It extends inward in the radial direction of the friction plate 70 from the side opposite to the drive source of the friction plate 70 so as to connect with the portion 82.

自動変速機10では、ピストン80は、押圧部81と、油圧室形成部82と、連結部83とを備える第1ピストン部材86と、第1ピストン部材86に結合されて油圧室形成部82を備えると共に締結用油圧室91及び解放用油圧室92を区画する第2ピストン部材87とから形成されている。 In the automatic transmission 10, the piston 80 includes the pressing portion 81, the hydraulic chamber forming portion 82, the first piston member 86 including the connecting portion 83, and the first piston member 86 coupled to the hydraulic chamber forming portion 82. The second piston member 87 is provided and defines a fastening hydraulic chamber 91 and a releasing hydraulic chamber 92.

第1ピストン部材86には、連結部83にスナップリング55に対応して設けられたスナップリング用溝部80aが形成されている。図4に示すように、第1ピストン部材86には、反駆動源側に環状に突出する被嵌合部86aが設けられ、第2ピストン部材87には、駆動源側に環状に突出する嵌合部87aが設けられている。 The first piston member 86 is formed with a snap ring groove portion 80 a provided in the connecting portion 83 so as to correspond to the snap ring 55. As shown in FIG. 4, the first piston member 86 is provided with a fitted portion 86a that annularly protrudes on the side opposite to the drive source, and the second piston member 87 has a fitting portion annularly protruding on the side adjacent to the drive source. A joining portion 87a is provided.

ピストン80は、第1ピストン部材86の被嵌合部86aと第2ピストン部材87の嵌合部87aとが圧入によって嵌合されることにより第1ピストン部材86と第2ピストン部材87とが結合されて形成されている。第2ピストン部材87は、第1ピストン部材86に結合されて反駆動源側の締結用油圧室91と駆動源側の解放用油圧室92とを区画している。 In the piston 80, the fitted portion 86a of the first piston member 86 and the fitting portion 87a of the second piston member 87 are fitted by press fitting, so that the first piston member 86 and the second piston member 87 are coupled. Is formed. The second piston member 87 is connected to the first piston member 86 to define a fastening hydraulic chamber 91 on the side opposite to the drive source and a releasing hydraulic chamber 92 on the side of the drive source.

第1ピストン部材86は、摩擦板70の反駆動源側から径方向内側に延びて第4ハブ部材51の外周面に嵌合されると共に、第4ハブ部材51より駆動源側を被嵌合部86aより径方向内側に延びて第3ハブ部材41の第2円筒部44の外周面44aに嵌合されている。第1ピストン部材86の径方向内側の端部には、第1ピストン部材86と第3ハブ部材41との間をシールするシール部材86bが装着されている。 The first piston member 86 extends radially inward from the anti-driving source side of the friction plate 70 and is fitted to the outer peripheral surface of the fourth hub member 51, and is fitted to the driving source side of the fourth hub member 51. It extends radially inward from the portion 86a and is fitted to the outer peripheral surface 44a of the second cylindrical portion 44 of the third hub member 41. A seal member 86b that seals between the first piston member 86 and the third hub member 41 is attached to the radially inner end of the first piston member 86.

第2ピストン部材87は、第1ピストン部材86に結合されて嵌合部87aより径方向内側に延びて第3ハブ部材41の第2円筒部44の外周面44bに嵌合されている。第2ピストン部材87は、第1ピストン部材86より径方向内側に延び、第2ピストン部材87の径方向内側の端部には、第2ピストン部材87と第3ハブ部材41との間をシールするシール部材87bが装着されている。 The second piston member 87 is joined to the first piston member 86, extends radially inward from the fitting portion 87 a, and is fitted to the outer peripheral surface 44 b of the second cylindrical portion 44 of the third hub member 41. The second piston member 87 extends radially inward of the first piston member 86, and the radially inner end of the second piston member 87 seals between the second piston member 87 and the third hub member 41. A sealing member 87b is attached.

このようにして、締結用油圧室91は、第1ピストン部材86、第2ピストン部材87、第3ハブ部材41及び第4ハブ部材51によって区画された空間部によって形成されている。解放用油圧室92は、第1ピストン部材86、第2ピストン部材87及び第3ハブ部材41によって区画された空間部によって形成されている。 In this way, the fastening hydraulic chamber 91 is formed by the space defined by the first piston member 86, the second piston member 87, the third hub member 41, and the fourth hub member 51. The releasing hydraulic chamber 92 is formed by a space portion defined by the first piston member 86, the second piston member 87, and the third hub member 41.

図5に示すように、付勢ユニット100は、締結用油圧室91内に配置されている。締結用油圧室91を形成する第2ピストン部材87は、反駆動源側が付勢ユニット100のスプリング101による付勢力を受けるようになっている。スプリング101と締結用油圧室91及び解放用油圧室92とは、複数の摩擦板70の径方向内側において径方向にオーバーラップする位置に配置されている。 As shown in FIG. 5, the urging unit 100 is arranged in the fastening hydraulic chamber 91. The second piston member 87 forming the fastening hydraulic chamber 91 receives the biasing force of the spring 101 of the biasing unit 100 on the side opposite to the drive source. The spring 101, the fastening hydraulic chamber 91, and the releasing hydraulic chamber 92 are arranged at positions radially overlapping with each other inside the plurality of friction plates 70 in the radial direction.

付勢ユニット100は、軸方向に延びるコイルスプリングからなる複数のスプリング101と、環状に形成されて複数のスプリング101の駆動源側の端部を保持する保持プレート102とを備えている。保持プレート102には、反駆動源側に円筒状に突出して複数のスプリング101がそれぞれ装着される複数のスプリングガイド部103が設けられ、複数のスプリング101が径方向にオーバーラップする位置且つ周方向に異なる位置に配置されている。 The urging unit 100 includes a plurality of springs 101, which are coil springs extending in the axial direction, and a holding plate 102 that is formed in an annular shape and holds the ends of the plurality of springs 101 on the drive source side. The holding plate 102 is provided with a plurality of spring guide portions 103 protruding in a cylindrical shape on the side opposite to the drive source and to which the plurality of springs 101 are respectively mounted, and the plurality of springs 101 overlap each other in the radial direction and in the circumferential direction. Are located in different positions.

付勢ユニット100は、保持プレート102が第2ピストン部材87の反駆動源側に支持されると共に保持プレート102に装着されたスプリング101の反駆動源側が第4ハブ部材51の駆動源側に支持されてハブ部材20に取り付けられている。付勢ユニット100は、スプリング101が自由長さとなったときにピストン80がゼロクリアランス位置になるように設定されている。 In the urging unit 100, the holding plate 102 is supported on the side opposite to the drive source of the second piston member 87, and the side opposite to the drive source of the spring 101 mounted on the holding plate 102 is supported on the side of the drive source of the fourth hub member 51. And is attached to the hub member 20. The biasing unit 100 is set so that the piston 80 is at the zero clearance position when the spring 101 has a free length.

このようにして、付勢ユニット100は、スプリング101がピストン80に解放位置からゼロクリアランス位置まで締結方向に付勢力を作用させるようになっている。そして、ピストン80がゼロクリアランス位置にあるときに締結用油圧室91に締結用油圧を供給すると、ピストン80が複数の摩擦板70を押し付けて、複数の摩擦板70が第1ハブ部材21の縦壁部22とピストン80との間に挟み込まれて相対回転不能になる締結状態となる締結位置まで移動される。 In this way, in the urging unit 100, the spring 101 applies the urging force to the piston 80 in the fastening direction from the release position to the zero clearance position. Then, when the fastening hydraulic pressure is supplied to the fastening hydraulic chamber 91 when the piston 80 is at the zero clearance position, the piston 80 presses the plurality of friction plates 70, and the plurality of friction plates 70 vertically move the first hub member 21. It is sandwiched between the wall portion 22 and the piston 80 and is moved to a fastening position where it is in a fastening state in which relative rotation is impossible.

一方、ピストン80が締結位置にあるときに、締結用油圧室91から締結用油圧を排出して解放用油圧室92に解放用油圧を供給すると、ピストン80が解放方向に付勢されて移動され、ピストン80がゼロクリアランス位置に移動される。ピストン80はさらに、スプリング101に抗して解放方向に付勢されて移動され、解放位置に移動される。 On the other hand, when the piston 80 is in the engagement position, when the engagement oil pressure is discharged from the engagement oil pressure chamber 91 and the release oil pressure is supplied to the release oil pressure chamber 92, the piston 80 is urged in the release direction and moved. , The piston 80 is moved to the zero clearance position. The piston 80 is further urged and moved in the releasing direction against the spring 101 to be moved to the releasing position.

自動変速機10では、図3に示すように、ピストン80の連結部83に、具体的には押圧部81より反駆動源側に膨出する膨出部83aに第1ハブ部材21の円筒部23のスプライン部25に対応して切り欠かれた第1ハブ部材用切欠部83bが形成されている。第1ハブ部材21の円筒部23のスプライン部25の反駆動源側は、ピストン80の第1ハブ部材用切欠部83bに嵌合され、第1ハブ部材21とピストン80とは、軸方向にオーバーラップして配置されている。 In the automatic transmission 10, as shown in FIG. 3, the cylindrical portion of the first hub member 21 is formed in the connecting portion 83 of the piston 80, specifically, in the bulging portion 83a bulging to the side opposite to the drive source from the pressing portion 81. A first hub member notch 83b is formed by notching corresponding to the spline portion 23 of No. 23. The opposite drive source side of the spline portion 25 of the cylindrical portion 23 of the first hub member 21 is fitted into the first hub member notch 83b of the piston 80, and the first hub member 21 and the piston 80 are axially arranged. It is arranged to overlap.

図14は、ブレーキのハブ部材及びピストンの要部を示す正面図である。図14に示すように、第1ハブ部材用切欠部83bは、スプライン部25の第1歯部26に対応して形成されている。第1ハブ部材用切欠部83bは、第1ハブ部材21のスプライン部25の第1歯部26の断面形状より大きく切り欠かれ、第1歯部26の両側の側面26aに沿ってそれぞれ配置される両側の側面83cを有している。ピストン80には、図7に示すように、第1ハブ部材21の複数、具体的には3つの第1歯部26に対応して3つの第1ハブ部材用切欠部83bが周方向に略等間隔に形成されている。 FIG. 14 is a front view showing essential parts of the brake hub member and the piston. As shown in FIG. 14, the first hub member notch 83 b is formed corresponding to the first tooth portion 26 of the spline portion 25. The first hub member notch portion 83b is notched larger than the cross-sectional shape of the first tooth portion 26 of the spline portion 25 of the first hub member 21, and is arranged along the side surfaces 26a on both sides of the first tooth portion 26, respectively. It has side surfaces 83c on both sides. As shown in FIG. 7, in the piston 80, three first hub member notches 83b corresponding to the plurality of first hub members 21, specifically, the three first tooth portions 26, are formed substantially in the circumferential direction. It is formed at equal intervals.

第1ハブ部材21は、ピストン80が周方向に回動するときに第1ハブ部材用切欠部83bの側面83cが第1ハブ部材21の第1歯部26の側面26aに当接してピストン80が所定量以上、例えばピストン80の回動角度が1度となる所定量以上回動することを規制するようになっている。 In the first hub member 21, when the piston 80 rotates in the circumferential direction, the side surface 83c of the first hub member cutout portion 83b comes into contact with the side surface 26a of the first tooth portion 26 of the first hub member 21 and the piston 80. Is restricted from rotating by a predetermined amount or more, for example, by a predetermined amount or more such that the rotation angle of the piston 80 becomes 1 degree.

第1ハブ部材用切欠部83bの側面83cは、ハブ部材20のスプライン部25の歯部26の側面26aに沿って配置される規制部として機能し、ハブ部材20、具体的には第1ハブ部材21は、ピストン80が周方向に所定量以上回動することを規制するピストン回動規制部材として機能する。 The side surface 83c of the first hub member cutout portion 83b functions as a restricting portion arranged along the side surface 26a of the tooth portion 26 of the spline portion 25 of the hub member 20, and the hub member 20, specifically, the first hub. The member 21 functions as a piston rotation restricting member that restricts the piston 80 from rotating in the circumferential direction by a predetermined amount or more.

第2ハブ部材31には、図11に示すように、締結用供給油路L2及び解放用供給油路L3の近傍に2つのボルト挿通穴32bが形成されている。図13に示すように、第3ハブ部材41には、第2ハブ部材31のボルト挿通穴32bに対応してネジ孔41aが形成されている。 As shown in FIG. 11, two bolt insertion holes 32b are formed in the second hub member 31 near the fastening supply oil passage L2 and the release supply oil passage L3. As shown in FIG. 13, a screw hole 41 a is formed in the third hub member 41 so as to correspond to the bolt insertion hole 32 b of the second hub member 31.

第3ハブ部材41は、図12に示すように、第2ハブ部材31の駆動源側から締結ボルトB2を第2ハブ部材31のボルト挿通穴32bを通じて第3ハブ部材41のネジ孔41aに螺合させることにより第2ハブ部材31に結合されている。第3ハブ部材41には、図13に示すように、駆動源側に第2ハブ部材31と第3ハブ部材41との間において締結用供給油路L2及び解放用供給油路L3の周囲をシールするシール部材47が装着されている。 As shown in FIG. 12, the third hub member 41 screws the fastening bolt B2 from the drive source side of the second hub member 31 into the screw hole 41a of the third hub member 41 through the bolt insertion hole 32b of the second hub member 31. It is connected to the second hub member 31 by being combined. As shown in FIG. 13, the third hub member 41 has a periphery of the fastening supply oil passage L2 and the release supply oil passage L3 between the second hub member 31 and the third hub member 41 on the drive source side. A seal member 47 for sealing is attached.

次に、ブレーキBR2に作動油を供給する供給油路について説明する。
摩擦板70に潤滑用作動油を供給する潤滑用供給油路L1は、第1ハブ部材21、第2ハブ部材31及び第3ハブ部材41に形成されている。締結用油圧室91に締結用作動油を供給する締結用供給油路L2は、第2ハブ部材31、第3ハブ部材41及び第4ハブ部材51に形成されている。解放用油圧室92に解放用作動油を供給する解放用供給油路L3は、第2ハブ部材31及び第3ハブ部材41に形成されている。
Next, the supply oil passage for supplying the hydraulic oil to the brake BR2 will be described.
The lubrication supply oil passage L1 for supplying the lubricating hydraulic oil to the friction plate 70 is formed in the first hub member 21, the second hub member 31, and the third hub member 41. The fastening supply oil passage L2 that supplies the fastening hydraulic oil to the fastening hydraulic chamber 91 is formed in the second hub member 31, the third hub member 41, and the fourth hub member 51. The release supply oil passage L3 for supplying the release hydraulic oil to the release hydraulic chamber 92 is formed in the second hub member 31 and the third hub member 41.

潤滑用供給油路L1は、図3及び図4に示すように、第2ハブ部材31の縦壁部32に設けられて径方向に延びる径方向油路131と、第2ハブ部材31の径方向油路131に接続されて第1ハブ部材21の円筒部23と第3ハブ部材41の円筒部43との間に周方向に環状に設けられる周方向油路132と、第1ハブ部材21の円筒部23に設けられて周方向油路132に接続されると共に第1ハブ部材21の円筒部23の外周面に開口して摩擦板70に潤滑用作動油を供給する供給口133とを備えて構成されている。 As shown in FIGS. 3 and 4, the lubrication supply oil passage L1 is provided in the vertical wall portion 32 of the second hub member 31 and extends in the radial direction, and the radial oil passage 131 and the diameter of the second hub member 31. A circumferential oil passage 132 connected to the directional oil passage 131 and annularly provided in the circumferential direction between the cylindrical portion 23 of the first hub member 21 and the cylindrical portion 43 of the third hub member 41; And a supply port 133 that is connected to the circumferential oil passage 132 and is opened in the outer peripheral surface of the cylindrical portion 23 of the first hub member 21 to supply the lubricating oil to the friction plate 70. It is equipped with.

図10に示すように、供給口133は、第1ハブ部材21の円筒部23の軸方向に並んで複数設けられると共に、第1ハブ部材21の円筒部23の周方向に離間して複数設けられる。供給口133は、好ましくは第1ハブ部材21の円筒部23のスプライン部25の歯部26、27の歯先に開口するように設けられるが、スプライン部25の歯部26、27の歯底に開口するように設けることも可能である。 As shown in FIG. 10, a plurality of supply ports 133 are provided side by side in the axial direction of the cylindrical portion 23 of the first hub member 21, and a plurality of supply ports 133 are provided separately in the circumferential direction of the cylindrical portion 23 of the first hub member 21. To be The supply port 133 is preferably provided so as to open at the tooth tips of the tooth portions 26, 27 of the spline portion 25 of the cylindrical portion 23 of the first hub member 21, but the tooth bottoms of the tooth portions 26, 27 of the spline portion 25 are preferably provided. It is also possible to provide it so that it may be opened.

第2ハブ部材31は、潤滑用供給油路L1がバルブボディ5に接続されるように形成されている。第2ハブ部材31の径方向油路131は、第2ハブ部材31の縦壁部32に設けられると共にバルブボディ接続部34の下面に開口し、バルブボディ5に接続されている。バルブボディ5は、潤滑用供給油路L1を通じて複数の摩擦板70に潤滑用作動油を供給できるようになっている。 The second hub member 31 is formed so that the lubricating supply oil passage L1 is connected to the valve body 5. The radial oil passage 131 of the second hub member 31 is provided in the vertical wall portion 32 of the second hub member 31, is opened on the lower surface of the valve body connecting portion 34, and is connected to the valve body 5. The valve body 5 can supply lubricating oil to the plurality of friction plates 70 through the lubricating oil passage L1.

締結用供給油路L2は、図5に示すように、第2ハブ部材31の縦壁部32に設けられて径方向に延びる径方向油路111と、第3ハブ部材41の第2円筒部44に設けられて第2ハブ部材31の径方向油路111に接続されて軸方向に延びると共に、第4ハブ部材51に設けられて径方向に延びる径方向油路112を介して締結用油圧室91に開口して接続される軸方向油路113とを備えて構成されている。第2ハブ部材31の径方向油路111の径方向内側は、第3ハブ部材41によって覆われて形成され、第4ハブ部材51の径方向油路112は、第3ハブ部材41によって覆われて形成されている。 As shown in FIG. 5, the fastening supply oil passage L2 is provided in the vertical wall portion 32 of the second hub member 31 and extends in the radial direction, and the radial oil passage 111 and the second cylindrical portion of the third hub member 41. 44 is connected to the radial oil passage 111 of the second hub member 31 and extends in the axial direction, and the fastening hydraulic pressure is provided via the radial oil passage 112 provided in the fourth hub member 51 and extending in the radial direction. And an axial oil passage 113 which is opened and connected to the chamber 91. The radially inner side of the radial oil passage 111 of the second hub member 31 is formed by being covered with the third hub member 41, and the radial oil passage 112 of the fourth hub member 51 is covered by the third hub member 41. Is formed.

第2ハブ部材31は、締結用供給油路L2がバルブボディ5に接続されるように形成されている。第2ハブ部材31の径方向油路111は、第2ハブ部材31の縦壁部32に設けられると共にバルブボディ接続部34の下面に開口し、バルブボディ5に接続されている。バルブボディ5は、締結用供給油路L2を通じて締結用油圧室91に締結用作動油を供給して所定の締結用油圧を供給できるようになっている。 The second hub member 31 is formed so that the fastening supply oil passage L2 is connected to the valve body 5. The radial oil passage 111 of the second hub member 31 is provided in the vertical wall portion 32 of the second hub member 31, is opened on the lower surface of the valve body connecting portion 34, and is connected to the valve body 5. The valve body 5 is configured to supply a fastening hydraulic oil to the fastening hydraulic chamber 91 through the fastening supply oil passage L2 to supply a predetermined fastening hydraulic pressure.

解放用供給油路L3は、図6に示すように、第2ハブ部材31の縦壁部32に設けられて径方向に延びる径方向油路121と、第3ハブ部材41の第2円筒部44に設けられて第2ハブ部材31の径方向油路121に接続されて軸方向に延びると共に、解放用油圧室92に開口して接続される軸方向油路122とを備えて構成されている。第2ハブ部材31の径方向油路121の径方向内側は、第3ハブ部材41によって覆われて形成されている。 As shown in FIG. 6, the release supply oil passage L3 is provided in the vertical wall portion 32 of the second hub member 31 and extends radially, and the radial oil passage 121 and the second cylindrical portion of the third hub member 41. And an axial oil passage 122 that is connected to the radial oil passage 121 of the second hub member 31 and extends in the axial direction and that is opened and connected to the releasing hydraulic chamber 92. There is. The radially inner side of the radial oil passage 121 of the second hub member 31 is formed so as to be covered by the third hub member 41.

第2ハブ部材31は、解放用供給油路L3がバルブボディ5に接続されるように形成されている。第2ハブ部材31の径方向油路121は、第2ハブ部材310の縦壁部32に設けられると共にバルブボディ接続部34の下面に開口し、バルブボディ5に接続されている。バルブボディ5は、解放用供給油路L3を通じて解放用油圧室92に解放用作動油を供給して所定の解放用油圧を供給できるようになっている。 The second hub member 31 is formed such that the release supply oil passage L3 is connected to the valve body 5. The radial oil passage 121 of the second hub member 31 is provided in the vertical wall portion 32 of the second hub member 310, opens on the lower surface of the valve body connecting portion 34, and is connected to the valve body 5. The valve body 5 is adapted to supply a release hydraulic oil to the release hydraulic chamber 92 through the release supply oil passage L3 to supply a predetermined release hydraulic pressure.

自動変速機10では、図11に示すように、締結用供給油路L2、解放用供給油路L3及び潤滑用供給油路L1をそれぞれ構成する径方向油路111、121、131が周方向に並んで配置されている。図12に示すように、潤滑用供給油路L1を構成する周方向油路132は、径方向油路131に接続されると共に周方向に環状に延びている。 In the automatic transmission 10, as shown in FIG. 11, the radial oil passages 111, 121, 131 that form the engagement supply oil passage L2, the release supply oil passage L3, and the lubrication supply oil passage L1 are circumferentially arranged. They are arranged side by side. As shown in FIG. 12, the circumferential oil passage 132 that constitutes the lubricating supply oil passage L1 is connected to the radial oil passage 131 and extends annularly in the circumferential direction.

次に、このようにして構成されたブレーキBR2の作動について説明する。
図15は、解放状態、ゼロクリアランス状態及び締結状態にあるブレーキを示す断面図である。図15では、図3に示すブレーキBR2の要部を示している。
Next, the operation of the brake BR2 thus configured will be described.
FIG. 15 is a cross-sectional view showing the brake in the released state, the zero clearance state and the engaged state. FIG. 15 shows a main part of the brake BR2 shown in FIG.

図15(a)では、締結用油圧室91から締結用油圧が排出されると共に解放用油圧室92に解放用油圧が供給されてピストン80を介してスプリング101を圧縮してピストン80が反駆動源側である解放方向に移動され、ピストン80の位置が複数の摩擦板70が解放状態となる解放位置にあるブレーキBR2の解放状態が示されている。 In FIG. 15A, the fastening hydraulic pressure is discharged from the fastening hydraulic pressure chamber 91 and the releasing hydraulic pressure is supplied to the releasing hydraulic pressure chamber 92 to compress the spring 101 via the piston 80 and the piston 80 is anti-driven. The released state of the brake BR2 is shown in which the brake BR2 is moved to the release direction which is the source side and the position of the piston 80 is in the released position where the plurality of friction plates 70 are in the released state.

ブレーキBR2の締結時には、図15(a)に示す解放状態において解放用油圧室92から解放用油圧が排出され、図15(b)に示すように、ピストン80がスプリング101の付勢力を受けてスプリング101の自由長さまで締結方向に移動され、ピストン80の位置が複数の摩擦板70を押圧することなく摩擦板70に接した状態若しくはほぼ接した状態であるゼロクリアランス状態となるゼロクリアランス位置になり、ブレーキBR2がゼロクリアランス状態となる。 When the brake BR2 is engaged, the releasing hydraulic pressure is discharged from the releasing hydraulic chamber 92 in the releasing state shown in FIG. 15A, and the piston 80 receives the urging force of the spring 101 as shown in FIG. 15B. The free length of the spring 101 is moved in the fastening direction, and the piston 80 is moved to the zero clearance position where the position of the piston 80 contacts the friction plates 70 without pressing the plurality of friction plates 70, or the zero clearance state in which the pistons 80 are almost in contact. Then, the brake BR2 is in the zero clearance state.

そして、図15(b)に示すゼロクリアランス状態において締結用油圧室91に締結用油圧が供給されると、図15(c)に示すように、ピストン80が締結用油圧室91に供給された締結用油圧によって締結方向に付勢されて移動され、ピストン80が複数の摩擦板70を押し付けてピストン80の位置が複数の摩擦板70が相対回転不能になる締結位置になり、ブレーキBR2が締結状態となる。 Then, when the fastening hydraulic pressure is supplied to the fastening hydraulic chamber 91 in the zero clearance state shown in FIG. 15B, the piston 80 is supplied to the fastening hydraulic chamber 91 as shown in FIG. 15C. It is moved by being urged in the fastening direction by the fastening hydraulic pressure, the piston 80 presses the plurality of friction plates 70, and the position of the piston 80 becomes the fastening position where the plurality of friction plates 70 cannot relatively rotate, and the brake BR2 is fastened. It becomes a state.

一方、ブレーキBR2の解放時には、図15(c)に示す締結状態において締結用油圧室91から締結用油圧が排出されると共に解放用油圧室92に解放用油圧が供給され、ピストン80が解放用油圧室92に供給された解放用油圧によって反駆動源側である解放方向に付勢されて移動され、図15(b)に示すゼロクリアランス状態を経て、図15(a)に示す解放状態となる。 On the other hand, when the brake BR2 is released, the engagement hydraulic pressure is discharged from the engagement hydraulic chamber 91 and the release hydraulic pressure is supplied to the release hydraulic chamber 92 in the engaged state shown in FIG. The release hydraulic pressure supplied to the hydraulic chamber 92 is urged and moved in the release direction, which is the side opposite to the drive source, and moves through the zero clearance state shown in FIG. 15(b) to the release state shown in FIG. 15(a). Become.

ブレーキBR2では、ピストン80を解放位置からゼロクリアランス位置までスプリング101によって精度良く移動させることができる。なお、図15(a)に示す解放状態において解放用油圧室92から解放用油圧が排出されてピストン80が締結方向に移動されるときに、ピストン80が速やかに移動されるように締結用油圧室91に作動油をプリチャージすることも可能である。 In the brake BR2, the piston 80 can be accurately moved by the spring 101 from the released position to the zero clearance position. Note that when the releasing hydraulic pressure is discharged from the releasing hydraulic chamber 92 and the piston 80 is moved in the engaging direction in the releasing state shown in FIG. 15A, the engaging hydraulic pressure is set so that the piston 80 is quickly moved. It is also possible to precharge the chamber 91 with hydraulic oil.

ブレーキBR2は、前述したように、車両の発進時にスリップ制御される。ブレーキBR2の締結時には、締結用油圧室91に締結用油圧よりも低い油圧が供給されて複数の摩擦板70がスリップ状態とされた後に締結用油圧室91に締結用油圧が供給されて複数の摩擦板70が締結される。一方、ブレーキBR2の解放時には、解放用油圧室92に解放用油圧よりも低い油圧が供給されて複数の摩擦板70がスリップ状態とされた後に解放用油圧室92に解放用油圧が供給されて複数の摩擦板70が締結解除される。 As described above, the brake BR2 is slip-controlled when the vehicle starts. At the time of engaging the brake BR2, a hydraulic pressure lower than the engaging hydraulic pressure is supplied to the engaging hydraulic chamber 91 so that the plurality of friction plates 70 are in a slip state, and then the engaging hydraulic pressure is supplied to the engaging hydraulic chamber 91. The friction plate 70 is fastened. On the other hand, when the brake BR2 is released, a hydraulic pressure lower than the releasing hydraulic pressure is supplied to the releasing hydraulic chamber 92, the plurality of friction plates 70 are brought into the slip state, and then the releasing hydraulic pressure is supplied to the releasing hydraulic chamber 92. The fastening of the plurality of friction plates 70 is released.

ブレーキBR2の締結時及び解放時には、潤滑用供給油路L1を通じて複数の摩擦板70に潤滑用作動油が供給され、ブレーキBR2がスリップ制御されるときに潤滑用供給油路L1を通じて複数の摩擦板70に潤滑用作動油が供給される。 When engaging and releasing the brake BR2, lubricating oil is supplied to the plurality of friction plates 70 through the lubricating supply oil passage L1, and when the brake BR2 is slip controlled, the plurality of friction plates are supplied through the lubricating supply oil passage L1. Lubricating hydraulic oil is supplied to 70.

このように、本実施形態に係る自動変速機10では、ハブ部材20とドラム部材60との間に複数の摩擦板70が配置されたブレーキBR2を備え、ハブ部材20は、摩擦板70がスプライン係合されるスプライン部25を備えた円筒部23を有して変速機ケース11にスプライン係合される第1ハブ部材21と、潤滑用供給油路L1を形成すると共にバルブボディ5に接続されるように変速機ケース11に嵌合される第2ハブ部材31と、第1ハブ部材21の径方向内側において第2ハブ部材31に結合されると共に、第1ハブ部材21の円筒部23との間に潤滑用供給油路L1を形成する円筒部43を有する第3ハブ部材41とを備える。 As described above, the automatic transmission 10 according to the present embodiment includes the brake BR2 in which the plurality of friction plates 70 are arranged between the hub member 20 and the drum member 60, and the hub member 20 has the friction plates 70 splined. A first hub member 21 that has a cylindrical portion 23 with a spline portion 25 that is engaged and that is spline-engaged with the transmission case 11, and forms a lubricating oil supply passage L1 and is connected to the valve body 5. The second hub member 31 fitted in the transmission case 11 as described above, and the cylindrical portion 23 of the first hub member 21 while being coupled to the second hub member 31 on the radially inner side of the first hub member 21. And a third hub member 41 having a cylindrical portion 43 that forms the lubricating oil supply passage L1.

そして、潤滑用供給油路L1は、第2ハブ部材31に設けられた潤滑用径方向油路131と、第2ハブ部材31の潤滑用径方向油路131に接続されて第1ハブ部材21の円筒部23と第3ハブ部材41の円筒部43との間に環状に設けられる潤滑用周方向油路132と、第1ハブ部材21の円筒部23に設けられる供給口133とを備える。 The lubrication supply oil passage L1 is connected to the lubrication radial oil passage 131 provided in the second hub member 31 and the lubrication radial oil passage 131 of the second hub member 31, and is connected to the first hub member 21. The lubricating circumferential oil passage 132 is annularly provided between the cylindrical portion 23 and the cylindrical portion 43 of the third hub member 41, and the supply port 133 is provided in the cylindrical portion 23 of the first hub member 21.

これにより、第1ハブ部材21が変速機ケース11にスプライン係合されるので、ブレーキBR2の締結時にスプライン部25を介して摩擦板70から入力される力によって第1ハブ部材21が変速機ケース11の周方向に回転することを抑制することができ、ハブ部材20の回り止めを行うことができる。 As a result, the first hub member 21 is spline-engaged with the transmission case 11, so that when the brake BR2 is engaged, the force input from the friction plate 70 via the spline portion 25 causes the first hub member 21 to move. The rotation of the hub member 20 in the circumferential direction can be suppressed, and the hub member 20 can be prevented from rotating.

また、第2ハブ部材31が変速機ケース11に嵌合されるので、第2ハブ部材31を変速機ケース11に固定させることができ、第2ハブ部材31とバルブボディ5との接続部において変速機ケース11の周方向のガタをなくしてバルブボディ5から第2ハブ部材31の潤滑用供給油路L1に潤滑用の作動油を効率良く供給することができる。 Further, since the second hub member 31 is fitted to the transmission case 11, the second hub member 31 can be fixed to the transmission case 11, and at the connection portion between the second hub member 31 and the valve body 5. It is possible to efficiently supply the lubricating hydraulic oil from the valve body 5 to the lubricating supply oil passage L1 of the second hub member 31 by eliminating play in the transmission case 11 in the circumferential direction.

さらに、潤滑用供給油路L1は、第2ハブ部材31の潤滑用径方向油路131と、第2ハブ部材31の潤滑用径方向油路131に接続されて第1ハブ部材21の円筒部23と第3ハブ部材41の円筒部43との間に環状に設けられる潤滑用周方向油路132と、第1ハブ部材21の円筒部23に設けられる供給口133とを備えるので、摩擦板70に潤滑用の作動油を効率良く供給することができる。 Further, the lubrication supply oil passage L1 is connected to the lubrication radial oil passage 131 of the second hub member 31 and the lubrication radial oil passage 131 of the second hub member 31, and is a cylindrical portion of the first hub member 21. Since the lubricating circumferential oil passage 132 is provided annularly between the cylindrical portion 23 of the third hub member 41 and the supply port 133 provided in the cylindrical portion 23 of the first hub member 21, the friction plate is provided. The lubricating oil can be efficiently supplied to 70.

したがって、ハブ部材20とドラム部材60との間に複数の摩擦板70が配置されたブレーキBR2を備えた自動変速機10において、摩擦板70がスプライン係合されるハブ部材20の回り止めを行うと共にバルブボディ5から摩擦板70に潤滑用の作動油を効率良く供給することができる。 Therefore, in the automatic transmission 10 including the brake BR2 in which the plurality of friction plates 70 are arranged between the hub member 20 and the drum member 60, the rotation of the hub member 20 in which the friction plates 70 are spline-engaged is prevented. At the same time, the hydraulic oil for lubrication can be efficiently supplied from the valve body 5 to the friction plate 70.

また、締結用油圧室91及び解放用油圧室92は、複数の摩擦板70の径方向内側に配置される。これにより、ピストン80の反摩擦板側に締結用油圧室及び解放用油圧室が配置される場合に比して、軸方向にコンパクトに構成することができる。また、付勢部材101は、締結用油圧室91及び解放用油圧室92と径方向にオーバーラップする位置に配置される。これにより、付勢部材101を締結用油圧室91及び解放用油圧室92と径方向にオーバーラップさせない場合に比して、径方向にコンパクトに構成することができる。 The fastening hydraulic chamber 91 and the releasing hydraulic chamber 92 are arranged radially inside the plurality of friction plates 70. As a result, it is possible to make the axial direction more compact than when the fastening hydraulic chamber and the releasing hydraulic chamber are arranged on the side opposite to the friction plate of the piston 80. Further, the biasing member 101 is arranged at a position overlapping the fastening hydraulic chamber 91 and the releasing hydraulic chamber 92 in the radial direction. As a result, the biasing member 101 can be made compact in the radial direction as compared with the case where the biasing member 101 does not overlap the fastening hydraulic chamber 91 and the releasing hydraulic chamber 92 in the radial direction.

また、締結用供給油路L2は、第2ハブ部材31に設けられる締結用径方向油路111と、第3ハブ部材41に設けられて第2ハブ部材31の締結用径方向油路111に接続されると共に締結用油圧室91に接続される締結用軸方向油路112とを備える。これにより、変速機ケース11に結合される第2ハブ部材31に締結用供給油路L2が形成されるので、バルブボディ5から締結用供給油路L2に作動油を容易に供給することができる。 Further, the fastening supply oil passage L2 is provided in the fastening radial oil passage 111 provided in the second hub member 31 and in the fastening radial oil passage 111 provided in the third hub member 41. And a fastening axial oil passage 112 that is connected to the fastening hydraulic chamber 91. As a result, since the fastening supply oil passage L2 is formed in the second hub member 31 coupled to the transmission case 11, the operating oil can be easily supplied from the valve body 5 to the fastening supply oil passage L2. ..

また、解放用供給油路L3は、第2ハブ部材31に設けられる解放用径方向油路121と、第3ハブ部材41に設けられて解放用径方向油路121に接続されると共に解放用油圧室92に接続される解放用軸方向油路122とを備える。これにより、変速機ケース11に結合される第2ハブ部材31に解放用供給油路L3が形成されるので、バルブボディ5から解放用供給油路L3に作動油を容易に供給することができる。 The releasing supply oil passage L3 is connected to the releasing radial oil passage 121 provided in the second hub member 31 and the releasing radial oil passage 121 provided in the third hub member 41, and is also used for releasing. And a release axial oil passage 122 connected to the hydraulic chamber 92. As a result, the release supply oil passage L3 is formed in the second hub member 31 coupled to the transmission case 11, so that the operating oil can be easily supplied from the valve body 5 to the release supply oil passage L3. ..

図16は、本発明の実施形態に係るブレーキの第1ハブ部材の変形例の斜視図である。図16に示すように、第1ハブ部材21´の円筒部23´を、スプライン部25を備えて外周側に配置される外側円筒部23aと、外側円筒部23aの内周側に配置されて潤滑用供給油路L1を形成する内側円筒部23bとによって構成することも可能である。 FIG. 16 is a perspective view of a modified example of the first hub member of the brake according to the embodiment of the present invention. As shown in FIG. 16, the cylindrical portion 23 ′ of the first hub member 21 ′ is arranged on the outer cylindrical portion 23 a including the spline portion 25 and arranged on the outer peripheral side, and on the inner peripheral side of the outer cylindrical portion 23 a. It can also be configured by the inner cylindrical portion 23b forming the lubrication supply oil passage L1.

図16に示す第1ハブ部材21´では、円筒部23´が、スプライン部25を備えて外周側に配置される外側円筒部23aと、外側円筒部23aの内周側に配置されて第3ハブ部材41の円筒部43との間に潤滑用供給油路L1を形成する内側円筒部23bとを備えて構成されている。第1ハブ部材21´の外側円筒部23aは、第1ハブ部材21と同様に駆動源側に縦壁部22が設けられて変速機ケース11にスプライン係合されている。 In the first hub member 21 ′ shown in FIG. 16, the cylindrical portion 23 ′ includes the spline portion 25 and the outer cylindrical portion 23 a arranged on the outer peripheral side and the outer cylindrical portion 23 a arranged on the inner peripheral side to form the third cylindrical portion 23 ′. The hub member 41 is configured to include an inner cylindrical portion 23b that forms the lubricating supply oil passage L1 with the cylindrical portion 43. The outer cylindrical portion 23 a of the first hub member 21 ′ is provided with the vertical wall portion 22 on the drive source side similarly to the first hub member 21 and is spline-engaged with the transmission case 11.

第1ハブ部材21´の内側円筒部23bには、摩擦板70に潤滑用作動油を供給する供給口133が円筒部23´の軸方向に並んで複数設けられると共に円筒部23´の周方向に離間して複数設けられている。第1ハブ部材21´の外側円筒部23aには、内側円筒部23bの供給口133に対応して周方向に切り欠かれた潤滑用切欠部23cが形成されている。第1ハブ部材21´は、第1ハブ部材21´の外側円筒部23aと内側円筒部23bとが別体で形成され、内側円筒部23bが外側円筒部23aに圧入によって嵌合されて結合されて形成されている。 The inner cylindrical portion 23b of the first hub member 21' is provided with a plurality of supply ports 133 that supply the lubricating hydraulic oil to the friction plate 70 in a line in the axial direction of the cylindrical portion 23' and in the circumferential direction of the cylindrical portion 23'. A plurality of them are provided separately from each other. The outer cylindrical portion 23a of the first hub member 21' is provided with a lubricating notch 23c that is notched in the circumferential direction corresponding to the supply port 133 of the inner cylindrical portion 23b. In the first hub member 21', the outer cylindrical portion 23a and the inner cylindrical portion 23b of the first hub member 21' are formed separately, and the inner cylindrical portion 23b is press-fitted into the outer cylindrical portion 23a to be joined. Is formed.

このように、第1ハブ部材21´の円筒部23´は、スプライン部25を備えた外側円筒部23aと潤滑用供給油路L1を形成する内側円筒部23bとを備え、外側円筒部23aに、内側円筒部23bの供給口133に対応した潤滑用切欠部23cが形成されることにより、単一部材からなる第1ハブ部材21の円筒部23に供給口133を穴開け加工することが困難な場合においても、第1ハブ部材21´の円筒部23´を、外側円筒部23aと内側円筒部23bとを別体で形成した後に外側円筒部23aと内側円筒部23bとを取り付けて形成することで、供給口133の穴開け加工を比較的容易に行うことができ、生産性の向上を図ることができる。 As described above, the cylindrical portion 23' of the first hub member 21' includes the outer cylindrical portion 23a having the spline portion 25 and the inner cylindrical portion 23b forming the lubrication supply oil passage L1. Since the lubricating notch 23c corresponding to the supply port 133 of the inner cylindrical portion 23b is formed, it is difficult to form the supply port 133 in the cylindrical portion 23 of the first hub member 21 that is a single member. Even in such a case, the cylindrical portion 23 ′ of the first hub member 21 ′ is formed by forming the outer cylindrical portion 23 a and the inner cylindrical portion 23 b separately and then attaching the outer cylindrical portion 23 a and the inner cylindrical portion 23 b. As a result, the boring of the supply port 133 can be performed relatively easily, and the productivity can be improved.

本発明は、例示された実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において、種々の改良及び設計上の変更が可能である。 The present invention is not limited to the illustrated embodiments, and various improvements and design changes can be made without departing from the gist of the present invention.

以上のように、本発明によれば、ハブ部材とドラム部材との間に複数の摩擦板が配置されたブレーキを備えた自動変速機において、摩擦板がスプライン係合されるハブ部材の回り止めを行うと共にバルブボディから摩擦板に潤滑用の作動油を効率良く供給することが可能となるから、この種の自動変速機ないしこれを搭載する車両の製造技術分野において好適に利用される可能性がある。 As described above, according to the present invention, in the automatic transmission including the brake in which the plurality of friction plates are arranged between the hub member and the drum member, the rotation stopper of the hub member in which the friction plates are spline-engaged is prevented. It is possible to efficiently supply the hydraulic oil for lubrication from the valve body to the friction plate, and therefore, it may be suitably used in the technical field of manufacturing an automatic transmission of this type or a vehicle equipped with the automatic transmission. There is.

10 自動変速機
11 変速機ケース
20 ハブ部材
21 第1ハブ部材
31 第2ハブ部材
41 第3ハブ部材
51 第4ハブ部材
60 ドラム部材
70 摩擦板
80 ピストン
90 油圧室
91 締結用油圧室
92 解放用油圧室
101 スプリング
BR2 第2ブレーキ
L1 潤滑用供給油路
L2 締結用供給油路
L3 解放用供給油路
R3 リングギヤ
10 automatic transmission
11 transmission case 20 hub member 21 first hub member 31 second hub member 41 third hub member 51 fourth hub member 60 drum member 70 friction plate 80 piston 90 hydraulic chamber 91 hydraulic chamber for fastening 92 hydraulic chamber for release 101 spring BR2 Second brake L1 Lubrication supply oil passage L2 Fastening supply oil passage L3 Release supply oil passage R3 Ring gear

Claims (5)

変速機ケースに結合されるハブ部材と、所定の回転部材に結合されるドラム部材と、前記ハブ部材と前記ドラム部材との間に配置される複数の摩擦板と、前記複数の摩擦板を締結するピストンとを有するブレーキを備えた自動変速機であって、
前記ハブ部材は、前記摩擦板がスプライン係合されるスプライン部を備えた円筒部を有すると共に前記変速機ケースにスプライン係合される第1ハブ部材と、前記第1ハブ部材の軸方向一方側に配置されると共に前記摩擦板に潤滑用の作動油を供給する潤滑用供給油路を形成し、且つ前記変速機ケースの下方に配設されるバルブボディに接続されるように前記変速機ケースに嵌合される第2ハブ部材と、前記第1ハブ部材の径方向内側において前記第2ハブ部材の軸方向他方側に結合されると共に、前記第1ハブ部材の円筒部の径方向内側に設けられて前記第1ハブ部材の円筒部との間に前記潤滑用供給油路を形成する円筒部を有する第3ハブ部材とを備え、
前記潤滑用供給油路は、前記第2ハブ部材に設けられて径方向に延びる潤滑用径方向油路と、前記第2ハブ部材の潤滑用径方向油路に接続されて前記第1ハブ部材の円筒部と前記第3ハブ部材の円筒部との間に周方向に環状に設けられる潤滑用周方向油路と、前記第1ハブ部材の円筒部に設けられて前記摩擦板に潤滑用の作動油を供給する供給口とを備えている、
ことを特徴する自動変速機。
A hub member coupled to a transmission case, a drum member coupled to a predetermined rotating member, a plurality of friction plates arranged between the hub member and the drum member, and a plurality of friction plates fastened together An automatic transmission including a brake having a piston for
The hub member has a cylindrical portion having a spline portion with which the friction plate is spline-engaged, a first hub member spline-engaged with the transmission case, and one axial side of the first hub member. And a transmission case for forming a lubricating oil supply passage for supplying a working oil for lubrication to the friction plate, and being connected to a valve body arranged below the transmission case. And a second hub member that is fitted to the first hub member, and is coupled to the other axial side of the second hub member on the radially inner side of the first hub member and to the radially inner side of the cylindrical portion of the first hub member. A third hub member that is provided and has a cylindrical portion that forms the lubrication supply oil passage between the cylindrical portion and the cylindrical portion of the first hub member;
The lubrication supply oil passage is connected to the lubrication radial oil passage provided in the second hub member and extending in the radial direction, and the lubrication radial oil passage of the second hub member, and the first hub member. And a circumferential oil passage for lubrication provided annularly in the circumferential direction between the cylindrical portion of the first hub member and the cylindrical portion of the third hub member, and for lubricating the friction plate provided in the cylindrical portion of the first hub member. And a supply port for supplying hydraulic oil,
An automatic transmission that is characterized.
前記第1ハブ部材の円筒部は、前記スプライン部を備えて外周側に配置される外側円筒部と、内周側に配置されて前記潤滑用供給油路を形成する内側円筒部とを備え、
前記内側円筒部に、前記供給口が設けられ、
前記外側円筒部に、前記供給口に対応して切り欠かれた潤滑用切欠部が形成されている、
ことを特徴とする請求項1に記載の自動変速機。
The cylindrical portion of the first hub member includes an outer cylindrical portion that includes the spline portion and is disposed on an outer peripheral side, and an inner cylindrical portion that is disposed on an inner peripheral side and forms the lubrication supply oil passage,
The inner cylindrical portion is provided with the supply port,
In the outer cylindrical portion, a notch for lubrication cut out corresponding to the supply port is formed.
The automatic transmission according to claim 1, wherein:
前記ピストンを締結方向に付勢する付勢部材と、
前記ピストンを締結方向に付勢する作動油が供給される締結用油圧室と、
前記ピストンを解放方向に付勢する作動油が供給される解放用油圧室と、
を備え、
前記締結用油圧室及び前記解放用油圧室は、前記複数の摩擦板の径方向内側に配置され、
前記付勢部材は、前記締結用油圧室及び前記解放用油圧室と径方向にオーバーラップする位置に配置されている、
ことを特徴とする請求項1又は請求項2に記載の自動変速機。
A biasing member that biases the piston in the fastening direction,
A fastening hydraulic chamber to which hydraulic oil for urging the piston in the fastening direction is supplied,
A releasing hydraulic chamber to which hydraulic oil for urging the piston in the releasing direction is supplied,
Equipped with
The fastening hydraulic chamber and the releasing hydraulic chamber are arranged radially inward of the plurality of friction plates,
The urging member is arranged at a position that radially overlaps with the fastening hydraulic chamber and the releasing hydraulic chamber.
The automatic transmission according to claim 1 or 2, characterized in that.
前記ピストンを締結方向に付勢する作動油が供給される締結用油圧室と、
前記締結用油圧室に締結用の作動油を供給する締結用供給油路とを備え、
前記締結用供給油路は、前記第2ハブ部材に設けられて径方向に延びる締結用径方向油路と、前記第3ハブ部材に設けられて前記第2ハブ部材の締結用径方向油路に接続されて軸方向に延びると共に前記締結用油圧室に接続される締結用軸方向油路とを備えている、
ことを特徴とする請求項1から請求項3の何れか1項に記載の自動変速機。
A fastening hydraulic chamber to which hydraulic oil for urging the piston in the fastening direction is supplied,
A fastening supply oil passage for supplying a working oil for fastening to the fastening hydraulic chamber,
The fastening supply oil passage is provided in the second hub member and extends in the radial direction, and the fastening supply oil passage is provided in the third hub member and is provided in the second hub member. And an axial oil passage for fastening connected to the fastening hydraulic chamber and extending in the axial direction.
The automatic transmission according to any one of claims 1 to 3, characterized in that
前記ピストンを解放方向に付勢する作動油が供給される解放用油圧室と、
前記解放用油圧室に解放用の作動油を供給する解放用供給油路とを備え、
前記解放用供給油路は、前記第2ハブ部材に設けられて径方向に延びる解放用径方向油路と、前記第3ハブ部材に設けられて前記第2ハブ部材の解放用径方向油路に接続されて軸方向に延びると共に前記解放用油圧室に接続される解放用軸方向油路とを備えている、
ことを特徴とする請求項1から請求項4の何れか1項に記載の自動変速機。
A releasing hydraulic chamber to which hydraulic oil for urging the piston in the releasing direction is supplied,
A release oil supply passage for supplying the release hydraulic oil to the release hydraulic chamber,
The releasing supply oil passage is provided in the second hub member and extends in the radial direction, and the releasing supply oil passage is provided in the third hub member, and the releasing radial oil passage is provided in the second hub member. A release axial oil passage connected to the release hydraulic chamber and extending in the axial direction.
The automatic transmission according to any one of claims 1 to 4, characterized in that
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7001984B1 (en) * 2021-09-02 2022-01-20 加茂精工株式会社 Driving force transmission device

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JPS48103781U (en) * 1972-03-13 1973-12-04
JP2018197577A (en) * 2017-05-24 2018-12-13 マツダ株式会社 Brake device of transmission

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Publication number Priority date Publication date Assignee Title
JPS48103781U (en) * 1972-03-13 1973-12-04
JP2018197577A (en) * 2017-05-24 2018-12-13 マツダ株式会社 Brake device of transmission

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Publication number Priority date Publication date Assignee Title
JP7001984B1 (en) * 2021-09-02 2022-01-20 加茂精工株式会社 Driving force transmission device
WO2023032258A1 (en) * 2021-09-02 2023-03-09 加茂精工株式会社 Driving force transmission device

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