JP2009103244A - Brake device - Google Patents

Brake device Download PDF

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Publication number
JP2009103244A
JP2009103244A JP2007276478A JP2007276478A JP2009103244A JP 2009103244 A JP2009103244 A JP 2009103244A JP 2007276478 A JP2007276478 A JP 2007276478A JP 2007276478 A JP2007276478 A JP 2007276478A JP 2009103244 A JP2009103244 A JP 2009103244A
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Japan
Prior art keywords
brake member
housing
peripheral surface
shaft
piston
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JP2007276478A
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Japanese (ja)
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JP5132251B2 (en
Inventor
Shinichi Naito
慎一 内藤
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Komatsu Ltd
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Komatsu Ltd
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Priority to JP2007276478A priority Critical patent/JP5132251B2/en
Priority to PCT/JP2008/065881 priority patent/WO2009054189A1/en
Publication of JP2009103244A publication Critical patent/JP2009103244A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
    • F16D55/36—Brakes with a plurality of rotating discs all lying side by side
    • F16D55/40—Brakes with a plurality of rotating discs all lying side by side actuated by a fluid-pressure device arranged in or one the brake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F16D65/186—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with full-face force-applying member, e.g. annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/02—Fluid pressure
    • F16D2121/12—Fluid pressure for releasing a normally applied brake, the type of actuator being irrelevant or not provided for in groups F16D2121/04 - F16D2121/10

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve assemblability of a brake device while suppressing upsizing thereof. <P>SOLUTION: In this brake device, a fixed side brake member 4 generates braking force by contacting with a rotary side brake member 3 by moving to the first direction side being the direction approaching the rotary side brake member 3 in the axial direction of a shaft 2, and releases braking by separating from the rotary side brake member 3 by moving in the second direction opposite to the first direction. A first housing 51 has a first storage part 53, and an inner diameter of a part on the second direction side more than the first storage part 53 is set to an inner diameter or more of the first storage part 53. A spacer is arranged in the second direction side of the fixed side brake member 4, and is a member separate from the first housing 51. A piston 7 has a small diameter part 71 and a large diameter part 72, and an oil pressure chamber for supplying pressure oil is constituted between an end surface on the second direction side of the spacer and the large diameter part 72. An energizing member 8 energizes the piston 7 to the first direction side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明はブレーキ装置に関する。   The present invention relates to a brake device.

一般に、ブレーキ装置は、シャフトと共に回転する回転側ブレーキディスクと、軸方向に移動可能であり回転不能に設けられた固定側ブレーキディスクと、付勢部材によって付勢されたピストンとを備えている。ピストンは、付勢部材からの付勢力によって軸方向に移動して固定側ブレーキディスクを押圧する。ピストンによって押圧された固定側ブレーキディスクは軸方向に移動して回転側ブレーキディスクに接触し、これによって、シャフトに対する制動力を生じさせる。また、ブレーキ装置の内部には、ハウジングの内壁面とピストンとの間に圧油が供給される油圧室が設けられている。この油圧室に圧油が供給されると、ピストンが、油圧によって付勢部材の付勢力に抗して移動し、固定側ブレーキディスクから離反する。これにより、固定側ブレーキディスクが回転側ブレーキディスクから離反して、制動が解除される。   In general, the brake device includes a rotation-side brake disk that rotates together with a shaft, a fixed-side brake disk that is movable in the axial direction and is non-rotatable, and a piston that is biased by a biasing member. The piston moves in the axial direction by the urging force from the urging member and presses the fixed brake disc. The fixed brake disc pressed by the piston moves in the axial direction and comes into contact with the rotary brake disc, thereby generating a braking force on the shaft. In addition, a hydraulic chamber in which pressure oil is supplied between the inner wall surface of the housing and the piston is provided inside the brake device. When pressure oil is supplied to the hydraulic chamber, the piston moves against the urging force of the urging member by the hydraulic pressure, and separates from the fixed brake disc. As a result, the fixed brake disc is separated from the rotation brake disc, and braking is released.

ここで、特許文献１に記載のブレーキ装置では、図３に示すように、ハウジング２０１の内周面の一部が径方向内側へ突出した形状となっており、この突出部２０２とピストン２０３との間に油圧室２０４が設けられている。   Here, in the brake device described in Patent Document 1, a part of the inner peripheral surface of the housing 201 protrudes radially inward as shown in FIG. A hydraulic chamber 204 is provided between the two.

また、特許文献２に記載のブレーキ装置では、図４に示すように、ハウジング３０１の内面の一部が拡径しており、それにより生じる段差３０２とピストン３０３との間に油圧室３０４が設けられている。
特公平７−８６３４７号公報 実公昭６１−３７８６９号公報 Further, in the brake device described in Patent Document 2, as shown in FIG. 4, a part of the inner surface of the housing 301 is enlarged in diameter, and a hydraulic chamber 304 is provided between the step 302 generated thereby and the piston 303. It has been.
Japanese Patent Publication No. 7-86347 Japanese Utility Model Publication No. 61-37869

しかし、上記の特許文献１に記載のブレーキ装置では、固定側ブレーキディスク２０５とピストン２０３との間にハウジング２０１の突出部２０２が位置しているため、ブレーキ装置の組立時において、固定側ブレーキディスク２０５とピストン２０３と付勢部材２０６とを一方向からハウジング２０１に組み付けることができない。   However, in the brake device described in Patent Document 1, since the protruding portion 202 of the housing 201 is located between the fixed brake disc 205 and the piston 203, the fixed brake disc is assembled when the brake device is assembled. 205, the piston 203, and the biasing member 206 cannot be assembled to the housing 201 from one direction.

また、特許文献２に記載のブレーキ装置では、ハウジング３０１内に油圧室３０４を設けるために内面の一部を拡径した形状にする必要がある。この場合、油圧室３０４の大きさを十分に確保しようとすると、ハウジング３０１が径方向に大型化してしまう。   Further, in the brake device described in Patent Document 2, in order to provide the hydraulic chamber 304 in the housing 301, it is necessary to have a shape in which a part of the inner surface is enlarged in diameter. In this case, if the size of the hydraulic chamber 304 is sufficiently secured, the housing 301 is enlarged in the radial direction.

本発明の課題は、ブレーキ装置において、組立性を向上させると共に大型化を抑えることにある。   An object of the present invention is to improve assemblability and suppress an increase in size in a brake device.

第１発明に係るブレーキ装置は、シャフトと、回転側ブレーキ部材と、固定側ブレーキ部材と、第１ハウジングと、スペーサーと、ピストンと、付勢部材とを備える。回転側ブレーキ部材は、シャフトに固定されシャフトと共に回転する。固定側ブレーキ部材は、シャフトの軸方向に沿って回転側ブレーキ部材に近接する方向である第１方向側に移動することによって回転側ブレーキ部材に接触して制動力を生じさせ、第１方向と反対の第２方向に移動することによって回転側ブレーキ部材から離反して制動を解除する。第１ハウジングは、固定側ブレーキ部材と回転側ブレーキ部材とが収納される第１収納部を有し、第１収納部より第２方向側の部分の内径が第１収納部の内径以上である。スペーサーは、第１ハウジング内において固定側ブレーキ部材の第２方向側に配置され、第１ハウジングの内周面に当接する外周面と、固定側ブレーキ部材の外径よりも小さな内径の内周面とを有し、第１ハウジングと別体の部材である。ピストンは、スペーサーの内周面に摺接する外周面と固定側ブレーキ部材に対向する第１端面とを有する小径部と、スペーサーの第２方向側において第１ハウジングの内周面に摺接し小径部より大径の外周面を有する大径部とを有し、スペーサーの第２方向側の端面と大径部との間に圧油が供給される油圧室が構成される。付勢部材は、ピストンを第１方向側に付勢する。   A brake device according to a first invention includes a shaft, a rotation-side brake member, a fixed-side brake member, a first housing, a spacer, a piston, and an urging member. The rotation-side brake member is fixed to the shaft and rotates together with the shaft. The stationary brake member moves along the axial direction of the shaft to the first direction side, which is a direction close to the rotation side brake member, thereby contacting the rotation side brake member to generate a braking force. By moving in the opposite second direction, the brake is released away from the rotation-side brake member. The first housing has a first storage portion in which the stationary brake member and the rotation-side brake member are stored, and the inner diameter of the portion on the second direction side from the first storage portion is equal to or larger than the inner diameter of the first storage portion. . The spacer is disposed in the second direction side of the stationary brake member in the first housing, and has an outer circumferential surface that contacts the inner circumferential surface of the first housing, and an inner circumferential surface having an inner diameter smaller than the outer diameter of the stationary brake member. And is a separate member from the first housing. The piston has a small diameter portion having an outer peripheral surface slidably contacting the inner peripheral surface of the spacer and a first end surface facing the fixed brake member, and a small diameter portion slidably contacting the inner peripheral surface of the first housing on the second direction side of the spacer. And a large-diameter portion having a larger-diameter outer peripheral surface, and a hydraulic chamber in which pressure oil is supplied between the end surface on the second direction side of the spacer and the large-diameter portion is configured. The biasing member biases the piston in the first direction.

このブレーキ装置では、油圧室に圧油が供給されていない状態では、付勢部材の付勢力によってピストンの第１端面が固定側ブレーキ部材を押圧することにより、固定側ブレーキ部材が回転側ブレーキ部材に接触する。これにより、制動力が発生する。また、油圧室に圧油が供給されると、油圧によってピストンの大径部に第２方向へ向かう力が作用する。この力が付勢部材による付勢力よりも大きくなると、ピストンは第２方向へ移動し、固定側ブレーキ部材が回転側ブレーキ部材から離反する。これにより、シャフトへの制動が解除される。   In this brake device, in a state where pressure oil is not supplied to the hydraulic chamber, the first end surface of the piston presses the stationary brake member by the urging force of the urging member, so that the stationary brake member becomes the rotating brake member. To touch. Thereby, a braking force is generated. Further, when pressure oil is supplied to the hydraulic chamber, a force in the second direction acts on the large diameter portion of the piston due to the hydraulic pressure. When this force becomes larger than the urging force by the urging member, the piston moves in the second direction, and the fixed brake member separates from the rotation brake member. Thereby, braking to the shaft is released.

ここで、このブレーキ装置では、第１ハウジングのうち第１収納部より第２方向側の部分の内径が第１収納部の内径以上である。また、油圧室を構成するために第１ハウジングの内面に突出部を設けるのではなく、第１ハウジングとは別体のスペーサーが用いられる。このため、固定側ブレーキ部材、スペーサー、ピストン、付勢部材を順に第２方向側から第１ハウジング内に組み付けることができる。また、ピストンの大径部とスペーサーとの間に油圧室が構成されるため、油圧室を構成する段差を設けるために第１ハウジングの内面を大きく拡径させる必要がない。このため、第１ハウジングの径方向への大型化を抑えることができる。   Here, in this brake device, the inner diameter of the portion of the first housing on the second direction side from the first housing portion is equal to or larger than the inner diameter of the first housing portion. Further, instead of providing a protrusion on the inner surface of the first housing in order to form the hydraulic chamber, a spacer separate from the first housing is used. For this reason, a stationary brake member, a spacer, a piston, and an urging member can be assembled in the first housing from the second direction side in order. In addition, since the hydraulic chamber is configured between the large-diameter portion of the piston and the spacer, it is not necessary to greatly enlarge the inner surface of the first housing in order to provide a step that configures the hydraulic chamber. For this reason, the enlargement to the radial direction of a 1st housing can be suppressed.

第２発明に係るブレーキ装置は、第１発明のブレーキ装置であって、第１収納部は、第１円筒部と、第２円筒部と、閉鎖部とを有する。第１円筒部は、固定側ブレーキ部材が取り付けられる内周面を有する。第２円筒部は、第１円筒部の内側に位置し、第１円筒部との間に回転側ブレーキ部材と固定側ブレーキ部材とを収納するディスク収納空間を構成する。閉鎖部は、ディスク収納空間の第１方向側を閉じる部分である。第１円筒部と第２円筒部と閉鎖部とは一体的に成形されている。また、このブレーキ装置は、軸受けをさらに備える。軸受けは、第２円筒部の内周面とシャフトの外周面とに亘って設けられ、シャフトを支持する。   A brake device according to a second invention is the brake device according to the first invention, wherein the first storage portion includes a first cylindrical portion, a second cylindrical portion, and a closing portion. The first cylindrical portion has an inner peripheral surface to which the fixed brake member is attached. The second cylindrical portion is located inside the first cylindrical portion, and constitutes a disk storage space for storing the rotation-side brake member and the stationary-side brake member between the first cylindrical portion. The closing portion is a portion that closes the first direction side of the disk storage space. The first cylindrical portion, the second cylindrical portion, and the closing portion are integrally formed. The brake device further includes a bearing. The bearing is provided across the inner peripheral surface of the second cylindrical portion and the outer peripheral surface of the shaft, and supports the shaft.

このブレーキ装置では、軸受けが設けられる第２円筒部が、回転側ブレーキ部材が取り付けられる第１円筒部と一体的に成形されている。このため、軸受けに支持されるシャフトと、固定側ブレーキ部材との位置関係の誤差を低減することができる。従って、シャフトに固定された固定側ブレーキ部材と、回転側ブレーキ部材との位置精度を向上させることができる。また、軸受けが、固定側ブレーキ部材および回転側ブレーキ部材に対して径方向に並んで配置されるため、第１ハウジングを軸方向に小型化することができる。さらに、このブレーキ装置では、上述したように、第１ハウジングに第２方向側から内部の部品を組み付けることができるため、第１円筒部と第２円筒部と閉鎖部とが一体的に成形されていても組立性を損なう恐れが少ない。   In this brake device, the second cylindrical part provided with the bearing is formed integrally with the first cylindrical part to which the rotation-side brake member is attached. For this reason, the error of the positional relationship between the shaft supported by the bearing and the stationary brake member can be reduced. Accordingly, it is possible to improve the positional accuracy between the fixed brake member fixed to the shaft and the rotation brake member. Further, since the bearings are arranged in the radial direction with respect to the stationary brake member and the rotating brake member, the first housing can be reduced in size in the axial direction. Furthermore, in this brake device, as described above, since the internal components can be assembled to the first housing from the second direction side, the first cylindrical portion, the second cylindrical portion, and the closing portion are integrally formed. Even if it is, there is little possibility of impairing assembly.

第３発明に係るブレーキ装置は、第２発明のブレーキ装置であって、ピストンは、第２方向側の端面から第１方向側へ凹んだ形状を有する。そして、付勢部材は、ピストンの内部に収納されている。   A brake device according to a third invention is the brake device according to the second invention, wherein the piston has a shape recessed from the end surface on the second direction side to the first direction side. The biasing member is housed inside the piston.

このブレーキ装置では、付勢部材がピストンの内部に収納されるため、第１ハウジングを軸方向に小型化することができる。   In this brake device, since the urging member is housed inside the piston, the first housing can be reduced in size in the axial direction.

本発明に係るブレーキ装置では、固定側ブレーキ部材、スペーサー、ピストン、付勢部材を順に第２方向側から第１ハウジング内に組み付けることができる。また、ピストンの大径部とスペーサーとの間に油圧室が構成されるため、第１ハウジングの内面を大きく拡径させる必要がない。このため、第１ハウジングの径方向への大型化を抑えることができる。   In the brake device according to the present invention, the stationary brake member, the spacer, the piston, and the urging member can be sequentially assembled in the first housing from the second direction side. Further, since the hydraulic chamber is formed between the large diameter portion of the piston and the spacer, it is not necessary to greatly enlarge the inner surface of the first housing. For this reason, the enlargement to the radial direction of a 1st housing can be suppressed.

本発明の一実施形態に係るブレーキ装置１を図１および図２に示す。このブレーキ装置１は、図１に示すように、トランスミッション１００に備えられており、図示しないエンジンからの駆動力により回転するシャフト２を制動するための装置である。なお、図２は、ブレーキ装置１の構成を示す拡大断面図である。   A brake device 1 according to an embodiment of the present invention is shown in FIGS. As shown in FIG. 1, the brake device 1 is provided in a transmission 100 and is a device for braking a shaft 2 that rotates by a driving force from an engine (not shown). FIG. 2 is an enlarged cross-sectional view showing the configuration of the brake device 1.

〔構成〕
このブレーキ装置１は、図２に示すように、シャフト２と、回転側ブレーキ部材３と、固定側ブレーキ部材４と、ハウジング５と、スペーサー６と、ピストン７と、付勢部材８と、軸受け９とを備える。 〔Constitution〕
As shown in FIG. 2, the brake device 1 includes a shaft 2, a rotation-side brake member 3, a fixed-side brake member 4, a housing 5, a spacer 6, a piston 7, a biasing member 8, and a bearing. 9.

シャフト２は、上述したように、エンジンからの駆動力によって回転する部材である。以下、シャフト２の軸方向に沿って図２における左から右へ向かう方向を第１方向と呼び、右から左へ向かう方向を第２方向と呼ぶ。また、第１方向側とは図２における右側、第２方向側とは図２における左側を意味するものとする。   As described above, the shaft 2 is a member that rotates by the driving force from the engine. Hereinafter, the direction from left to right in FIG. 2 along the axial direction of the shaft 2 is referred to as a first direction, and the direction from right to left is referred to as a second direction. The first direction side means the right side in FIG. 2, and the second direction side means the left side in FIG.

回転側ブレーキ部材３は、ブレーキ取付部材３１を介してシャフト２に固定されており、シャフト２と共に回転する。回転側ブレーキ部材３は、シャフト２の軸方向に距離を隔てて互いに平行に配置された複数の第１ディスク部材３２から構成されている。なお、図２では、第１ディスク部材３２の１つのみに符号を付して他は省略している。   The rotation-side brake member 3 is fixed to the shaft 2 via the brake attachment member 31 and rotates together with the shaft 2. The rotation-side brake member 3 is composed of a plurality of first disk members 32 arranged in parallel to each other at a distance in the axial direction of the shaft 2. In FIG. 2, only one of the first disk members 32 is given a reference numeral and the other is omitted.

ブレーキ取付部材３１は、軸方向に並んで連続している第１小径部３３と第１大径部３４とを有する管状の部材である。第１小径部３３は、第１大径部３４の第２方向側に位置しており、第１大径部３４よりも小さな外径を有する。第１小径部３３の内周面はシャフト２に接触しており、ブレーキ取付部材３１は第１小径部３３においてシャフト２に固定されている。第１大径部３４の外周面には、回転側ブレーキ部材３が固定されている。   The brake attachment member 31 is a tubular member having a first small diameter portion 33 and a first large diameter portion 34 that are arranged side by side in the axial direction. The first small diameter portion 33 is located on the second direction side of the first large diameter portion 34 and has an outer diameter smaller than that of the first large diameter portion 34. The inner peripheral surface of the first small diameter portion 33 is in contact with the shaft 2, and the brake mounting member 31 is fixed to the shaft 2 at the first small diameter portion 33. The rotation side brake member 3 is fixed to the outer peripheral surface of the first large diameter portion 34.

固定側ブレーキ部材４は、軸方向に移動可能に且つ回転不能に設けられており、シャフト２の軸方向に沿って第１方向側に移動することによって回転側ブレーキ部材３に近接し、回転側ブレーキ部材３に接触することにより制動力を生じさせる。また、固定側ブレーキ部材４は、第２方向に移動することによって回転側ブレーキ部材３から離反してシャフト２への制動を解除する。固定側ブレーキ部材４は、軸方向に距離を隔てて互いに平行に配置された複数の第２ディスク部材４１から構成されている。   The fixed-side brake member 4 is provided so as to be movable in the axial direction and non-rotatable. The fixed-side brake member 4 moves toward the first direction along the axial direction of the shaft 2, thereby approaching the rotary-side brake member 3, A braking force is generated by contacting the brake member 3. Further, the fixed brake member 4 moves away from the rotation brake member 3 by moving in the second direction to release the braking to the shaft 2. The fixed brake member 4 is composed of a plurality of second disk members 41 arranged in parallel with each other at a distance in the axial direction.

なお、図２では、第２ディスク部材４１の１つのみに符号を付して他は省略している。上述した複数の第１ディスク部材３２と、これらの第２ディスク部材４１とは、軸方向に隙間を隔てて交互に並んで配置されている。   In FIG. 2, only one of the second disk members 41 is given a reference numeral and the others are omitted. The plurality of first disk members 32 and the second disk members 41 described above are alternately arranged side by side with a gap in the axial direction.

ハウジング５は、別体に形成された第１ハウジング５１と第２ハウジング５２とを有する。   The housing 5 includes a first housing 51 and a second housing 52 that are formed separately.

第１ハウジング５１は、固定側ブレーキ部材４と回転側ブレーキ部材３とが収納される第１収納部５３と、スペーサー６とピストン７と付勢部材８とが収納される第２収納部５４とを有する。第１ハウジング５１は、一体的に成形された部材であり、第２方向側の端部が開放されている。また、第１ハウジング５１のうち第１収納部５３より第２方向側の部分の内径は、第１収納部５３の内径以上となっている。   The first housing 51 includes a first storage portion 53 in which the fixed brake member 4 and the rotation brake member 3 are stored, and a second storage portion 54 in which the spacer 6, the piston 7, and the biasing member 8 are stored. Have The first housing 51 is an integrally molded member, and an end portion on the second direction side is opened. Further, the inner diameter of the portion of the first housing 51 on the second direction side from the first storage portion 53 is equal to or larger than the inner diameter of the first storage portion 53.

第１収納部５３は、第１円筒部５５と、第１円筒部５５の内側に位置する第２円筒部５６と、第１円筒部５５と第２円筒部５６との第１方向側の端部を繋ぐ閉鎖部５７とを有する。   The first storage portion 53 includes a first cylindrical portion 55, a second cylindrical portion 56 located inside the first cylindrical portion 55, and ends of the first cylindrical portion 55 and the second cylindrical portion 56 on the first direction side. And a closing portion 57 that connects the portions.

第１円筒部５５は、第１収納部５３の外周面を構成しており、第１円筒部５５の内周面には、固定側ブレーキ部材４が取り付けられている。   The first cylindrical portion 55 constitutes the outer peripheral surface of the first storage portion 53, and the fixed brake member 4 is attached to the inner peripheral surface of the first cylindrical portion 55.

第２円筒部５６は、第１円筒部５５との間に回転側ブレーキ部材３と固定側ブレーキ部材４とを収納するディスク収納空間を構成している。第２円筒部５６は、ブレーキ取付部材３１の第１大径部３４の内側に位置しており、その第２方向側の端面５６ａは、ブレーキ取付部材３１の第１大径部３４と第１小径部３３との間の段差部３５に対向している。また、第２円筒部５６の第２方向側の端面５６ａには径方向内側に突出するフランジ部５６ｂが設けられている。   The second cylindrical portion 56 constitutes a disk storage space for storing the rotation-side brake member 3 and the fixed-side brake member 4 between the first cylindrical portion 55 and the second cylindrical portion 56. The second cylindrical portion 56 is located inside the first large-diameter portion 34 of the brake mounting member 31, and the end surface 56 a on the second direction side thereof is the same as the first large-diameter portion 34 and the first large-diameter portion 34 of the brake mounting member 31. It faces the step portion 35 between the small diameter portion 33. Further, a flange portion 56 b that protrudes radially inward is provided on the end surface 56 a on the second direction side of the second cylindrical portion 56.

閉鎖部５７は、第１円筒部５５の内周面と第２円筒部５６の外周面との間に設けられたディスク収納空間の第１方向側を閉じている。   The closing portion 57 closes the first direction side of the disk storage space provided between the inner peripheral surface of the first cylindrical portion 55 and the outer peripheral surface of the second cylindrical portion 56.

なお、第１円筒部５５と第２円筒部５６と閉鎖部５７とは、第１ハウジング５１の一部であるため、当然に一体的に成形されている。   Note that the first cylindrical portion 55, the second cylindrical portion 56, and the closing portion 57 are part of the first housing 51, and are naturally formed integrally.

第２ハウジング５２は、第１ハウジング５１の第２方向側を塞ぐように第１ハウジング５１と固定される。第２ハウジング５２の第１方向側の端面には、第２方向側へ陥入した第１凹部５２ａが形成されている。また、第１凹部５２ａの径方向外側には第２方向側へ陥入した第２凹部５２ｂが形成されている。   The second housing 52 is fixed to the first housing 51 so as to close the second direction side of the first housing 51. A first recess 52 a that is recessed toward the second direction is formed on the end surface of the second housing 52 on the first direction side. In addition, a second recess 52b that is recessed toward the second direction is formed on the outer side in the radial direction of the first recess 52a.

スペーサー６は、ハウジング５と別体に形成された部材であり、第１ハウジング５１内において固定側ブレーキ部材４の第２方向側に配置されている。スペーサー６は、第１ハウジング５１の内周面に当接する外周面と、固定側ブレーキ部材４の外径よりも小さく且つ固定側ブレーキ部材４の内径よりも大きい内周面とを有する。スペーサー６の第１方向側の端面６４は固定側ブレーキ部材４に対向しており、スペーサー６の第２方向側の端面６５は後述する油圧室１０に面している。スペーサー６は、抜け止め部材６１によって第２方向への移動が規制されており、固定側ブレーキ部材４の支持部材４２と抜け止め部材６１とに挟持されることによって第１ハウジング５１に固定されている。なお、抜け止め部材６１は、第１ハウジング５１の内周面に形成された溝部６２に嵌め込まれている。また、スペーサー６の外周面には、第１ハウジング５１の内周面との間をシールするシール部材６３が設けられている。   The spacer 6 is a member formed separately from the housing 5, and is disposed on the second direction side of the stationary brake member 4 in the first housing 51. The spacer 6 has an outer peripheral surface that is in contact with the inner peripheral surface of the first housing 51, and an inner peripheral surface that is smaller than the outer diameter of the fixed brake member 4 and larger than the inner diameter of the fixed brake member 4. An end face 64 on the first direction side of the spacer 6 faces the fixed brake member 4, and an end face 65 on the second direction side of the spacer 6 faces the hydraulic chamber 10 described later. The spacer 6 is restricted from moving in the second direction by a retaining member 61, and is fixed to the first housing 51 by being sandwiched between the support member 42 of the stationary brake member 4 and the retaining member 61. Yes. The retaining member 61 is fitted in a groove 62 formed on the inner peripheral surface of the first housing 51. In addition, a seal member 63 is provided on the outer peripheral surface of the spacer 6 to seal between the inner peripheral surface of the first housing 51.

ピストン７は、第２小径部７１と、第２小径部７１の第２方向側において第２小径部７１と連続する第２大径部７２とを有する。   The piston 7 includes a second small diameter portion 71 and a second large diameter portion 72 that is continuous with the second small diameter portion 71 on the second direction side of the second small diameter portion 71.

第２小径部７１は、スペーサー６の内周面に摺接する外周面と、固定側ブレーキ部材４に対向する第１端面７３とを有する。なお、第２小径部７１の外周面には、スペーサー６の内周面との間をシールするシール部材７４が設けられている。   The second small diameter portion 71 has an outer peripheral surface that is in sliding contact with the inner peripheral surface of the spacer 6 and a first end surface 73 that faces the stationary brake member 4. A seal member 74 is provided on the outer peripheral surface of the second small diameter portion 71 to seal the space between the inner peripheral surface of the spacer 6.

第２大径部７２の外周面は、第２小径部７１より大径であり、スペーサー６の第２方向側において第１ハウジング５１の内周面に摺接する。また、第２大径部７２の第２方向側の第２端面７５は、第２ハウジング５２の第２凹部５２ｂに対向している。なお、第２大径部７２の外周面には、第１ハウジング５１の内周面との間をシールするシール部材７６が設けられている。この第２大径部７２とスペーサー６の第２方向側の端面６５との間に圧油が供給される油圧室１０が構成される。第１ハウジング５１には、油圧室１０に面する位置に圧油の供給孔１１が設けられており、この供給孔１１を通って圧油が油圧室１０に供給される。   The outer peripheral surface of the second large diameter portion 72 is larger in diameter than the second small diameter portion 71 and is in sliding contact with the inner peripheral surface of the first housing 51 on the second direction side of the spacer 6. The second end surface 75 of the second large diameter portion 72 on the second direction side faces the second recess 52 b of the second housing 52. A seal member 76 is provided on the outer peripheral surface of the second large diameter portion 72 to seal the space between the first large diameter portion 72 and the inner peripheral surface of the first housing 51. A hydraulic chamber 10 to which pressure oil is supplied is configured between the second large diameter portion 72 and the end surface 65 on the second direction side of the spacer 6. The first housing 51 is provided with a pressure oil supply hole 11 at a position facing the hydraulic chamber 10, and the pressure oil is supplied to the hydraulic chamber 10 through the supply hole 11.

また、ピストン７は、第２端面７５から第１方向側へ凹んだ形状を有しており、内部に後述する付勢部材８が収納される内部空間を有している。ピストン７の第２小径部７１には内周面から径方向内側へ突出するフランジ部７７が設けられており、このフランジ部７７には、第１方向へ凹んだ第３凹部７８が設けられている。   Further, the piston 7 has a shape recessed from the second end surface 75 toward the first direction side, and has an internal space in which a biasing member 8 described later is accommodated. The second small-diameter portion 71 of the piston 7 is provided with a flange portion 77 that protrudes radially inward from the inner peripheral surface. The flange portion 77 is provided with a third recess 78 that is recessed in the first direction. Yes.

付勢部材８は、例えばコイルスプリングであり、ピストン７を第１方向側に付勢する。付勢部材８は、ピストン７の内部空間に収納されており、第１方向側の端部は、ピストン７の第３凹部７８に当接している。付勢部材８の第２方向側の端部は、第２ハウジング５２の第１凹部５２ａに当接している。   The biasing member 8 is a coil spring, for example, and biases the piston 7 in the first direction. The biasing member 8 is housed in the internal space of the piston 7, and the end portion on the first direction side is in contact with the third recess 78 of the piston 7. The end of the biasing member 8 on the second direction side is in contact with the first recess 52 a of the second housing 52.

軸受け９は、第２円筒部５６の内周面とシャフト２の外周面とに亘って設けられ、シャフト２を支持している。軸受け９は、第２円筒部５６のフランジ部５６ｂと、シャフト２に設けられた段差部２１とに挟まれており、これにより軸方向への移動が規制されている。   The bearing 9 is provided across the inner peripheral surface of the second cylindrical portion 56 and the outer peripheral surface of the shaft 2, and supports the shaft 2. The bearing 9 is sandwiched between the flange portion 56 b of the second cylindrical portion 56 and the step portion 21 provided on the shaft 2, thereby restricting movement in the axial direction.

〔ブレーキ装置１の動作〕
このブレーキ装置１では、油圧室１０に圧油が供給されていない状態では、付勢部材８の付勢力によってピストン７の第１端面７３が固定側ブレーキ部材４を第１方向に押圧する。固定側ブレーキ部材４は、第１方向へ押圧されることにより、回転側ブレーキ部材３に接触する。これにより、シャフト２に対する制動力が発生する。 [Operation of brake device 1]
In the brake device 1, the first end surface 73 of the piston 7 presses the stationary brake member 4 in the first direction by the urging force of the urging member 8 when pressure oil is not supplied to the hydraulic chamber 10. The stationary brake member 4 comes into contact with the rotating brake member 3 by being pressed in the first direction. Thereby, the braking force with respect to the shaft 2 is generated.

また、油圧室１０に圧油が供給されると、油圧によってピストン７の第２大径部７２に第２方向へ向かう力が作用する。この力が付勢部材８による付勢力よりも大きくなると、ピストン７は第２方向へ移動し、固定側ブレーキ部材４が回転側ブレーキ部材３から離反する。これにより、シャフト２への制動が解除される。   Further, when pressure oil is supplied to the hydraulic chamber 10, a force in the second direction acts on the second large diameter portion 72 of the piston 7 by the hydraulic pressure. When this force becomes larger than the urging force by the urging member 8, the piston 7 moves in the second direction, and the fixed brake member 4 is separated from the rotating brake member 3. Thereby, braking to the shaft 2 is released.

〔特徴〕
このブレーキ装置１では、第１収納部５３より第２方向側の部分の内径が第１収納部５３の内径以上であるため、回転側ブレーキ部材３、固定側ブレーキ部材４、スペーサー６、ピストン７、付勢部材８を第２方向側から第１ハウジング５１内に組み付けることができる。このため、第１ハウジング５１の第１円筒部５５、第２円筒部５６、閉鎖部５７を一体的に形成しても、ブレーキ部材の組立性が損なわれない。 〔Characteristic〕
In the brake device 1, the inner diameter of the portion on the second direction side from the first storage portion 53 is equal to or larger than the inner diameter of the first storage portion 53, so the rotation side brake member 3, the fixed side brake member 4, the spacer 6, and the piston 7. The urging member 8 can be assembled into the first housing 51 from the second direction side. For this reason, even if the 1st cylindrical part 55 of the 1st housing 51, the 2nd cylindrical part 56, and the closing part 57 are formed integrally, the assembly property of a brake member is not impaired.

また、第１円筒部５５、第２円筒部５６、閉鎖部５７が一体的に形成されることにより、軸受け９を介して第２円筒部５６に支持されるシャフト２と、第１ハウジング５１との位置精度を向上させることができる。このため、第１ハウジング５１に設けられた固定側ブレーキ部材４と、シャフト２に固定された回転側ブレーキ部材３との位置精度を向上させることができる。   In addition, the first cylindrical portion 55, the second cylindrical portion 56, and the closing portion 57 are integrally formed, so that the shaft 2 supported by the second cylindrical portion 56 via the bearing 9, the first housing 51, and the like. The positional accuracy can be improved. For this reason, it is possible to improve the positional accuracy between the stationary brake member 4 provided in the first housing 51 and the rotating brake member 3 fixed to the shaft 2.

また、第１ハウジング５１とは別体のスペーサー６によってピストン７の第２大径部７２との間に油圧室１０が構成されるため、スペーサー６の第２方向側の端面６５と同じ大きさの段差を設けるために第１ハウジング５１の内周面の一部を拡径させる場合と比べて、第１ハウジング５１を径方向に小型化することができる。   In addition, since the hydraulic chamber 10 is configured between the second large-diameter portion 72 of the piston 7 by the spacer 6 separate from the first housing 51, the same size as the end surface 65 on the second direction side of the spacer 6. Compared with the case where the diameter of a part of the inner peripheral surface of the first housing 51 is increased in order to provide the step, the first housing 51 can be downsized in the radial direction.

さらに、軸受け９は回転側ブレーキ部材３と固定側ブレーキ部材４との径方向内側に配置されており、付勢部材８は、ピストン７の径方向内側に配置されている。このため、ブレーキ装置１を軸方向に小型化することができる。   Further, the bearing 9 is disposed on the radially inner side of the rotation-side brake member 3 and the fixed-side brake member 4, and the urging member 8 is disposed on the radially inner side of the piston 7. For this reason, the brake device 1 can be reduced in size in the axial direction.

〔他の実施形態〕
上記の実施形態では、トランスミッション１００に内蔵されたブレーキ装置１が例示されているが、本発明の適用対象はこれに限られるものではない。 [Other Embodiments]
In the above embodiment, the brake device 1 built in the transmission 100 is illustrated, but the application target of the present invention is not limited to this.

本発明は、組立性を向上させると共に大型化を抑える効果を有し、ブレーキ装置として有用である。   The present invention has an effect of improving assemblability and suppressing an increase in size, and is useful as a brake device.

ブレーキ装置を有するトランスミッションの全体図。1 is an overall view of a transmission having a brake device. ブレーキ装置の拡大断面図。The expanded sectional view of a brake device. 従来のブレーキ装置の断面図。Sectional drawing of the conventional brake device. 従来のブレーキ装置の断面図。Sectional drawing of the conventional brake device.

符号の説明Explanation of symbols

１ ブレーキ装置
２ シャフト
３ 回転側ブレーキ部材
４ 固定側ブレーキ部材
６ スペーサー
７ ピストン
８ 付勢部材
５１ 第１ハウジング
５３ 第１収納部
７１ 第２小径部（小径部）
７２ 第２大径部（大径部） DESCRIPTION OF SYMBOLS 1 Brake apparatus 2 Shaft 3 Rotation side brake member 4 Fixed side brake member 6 Spacer 7 Piston 8 Energizing member 51 1st housing 53 1st accommodating part 71 2nd small diameter part (small diameter part)
72 Second large diameter part (large diameter part)

Claims (3)

シャフトと、
前記シャフトに固定され前記シャフトと共に回転する回転側ブレーキ部材と、
前記シャフトの軸方向に沿って前記回転側ブレーキ部材に近接する方向である第１方向側に移動することによって前記回転側ブレーキ部材に接触して制動力を生じさせ、第１方向と反対の第２方向に移動することによって前記回転側ブレーキ部材から離反して制動を解除する固定側ブレーキ部材と、
前記固定側ブレーキ部材と前記回転側ブレーキ部材とが収納される第１収納部を有し、前記第１収納部より第２方向側の部分の内径が前記第１収納部の内径以上である第１ハウジングと、
前記第１ハウジング内において前記固定側ブレーキ部材の第２方向側に配置され、前記第１ハウジングの内周面に当接する外周面と、前記固定側ブレーキ部材の外径よりも小さな内径の内周面とを有し、前記第１ハウジングと別体のスペーサーと、
前記スペーサーの内周面に摺接する外周面と前記固定側ブレーキ部材に対向する第１端面とを有する小径部と、前記スペーサーの第２方向側において前記第１ハウジングの内周面に摺接し前記小径部より大径の外周面を有する大径部とを有し、前記スペーサーの第２方向側の端面と前記大径部との間に圧油が供給される油圧室が構成されるピストンと、
前記ピストンを第１方向側に付勢する付勢部材と、
を備えるブレーキ装置。 A shaft,
A rotation-side brake member fixed to the shaft and rotating together with the shaft;
By moving toward the first direction along the axial direction of the shaft, the brake member is brought into contact with the rotation-side brake member to generate a braking force, and a first force opposite to the first direction is generated. A fixed-side brake member for releasing braking by moving away from the rotating-side brake member by moving in two directions;
A first storage portion in which the stationary brake member and the rotation-side brake member are stored; and an inner diameter of a portion on the second direction side of the first storage portion is equal to or larger than an inner diameter of the first storage portion. One housing;
An outer peripheral surface disposed on the second direction side of the fixed-side brake member in the first housing and contacting an inner peripheral surface of the first housing, and an inner periphery having an inner diameter smaller than the outer diameter of the fixed-side brake member And a spacer separate from the first housing;
A small-diameter portion having an outer peripheral surface slidably contacting the inner peripheral surface of the spacer and a first end surface facing the fixed brake member; A piston having a large-diameter portion having an outer peripheral surface larger in diameter than the small-diameter portion, and a hydraulic chamber in which pressure oil is supplied between the end surface on the second direction side of the spacer and the large-diameter portion; ,
A biasing member that biases the piston toward the first direction;
A brake device comprising: 前記第１収納部は、前記固定側ブレーキ部材が取り付けられる内周面を有する第１円筒部と、前記第１円筒部の内側に位置し前記第１円筒部との間に前記回転側ブレーキ部材と前記固定側ブレーキ部材とを収納するディスク収納空間を構成する第２円筒部と、前記ディスク収納空間の第１方向側を閉じる閉鎖部とを有し、前記第１円筒部と前記第２円筒部と前記閉鎖部とは一体的に成形されており、
前記第２円筒部の内周面と前記シャフトの外周面とに亘って設けられ前記シャフトを支持する軸受けをさらに備える、
請求項１に記載のブレーキ装置。 The first storage portion is located between the first cylindrical portion having an inner peripheral surface to which the fixed brake member is attached and the first cylindrical portion, and the rotation-side brake member. And a second cylinder part that constitutes a disk storage space for storing the stationary brake member, and a closing part that closes a first direction side of the disk storage space, the first cylinder part and the second cylinder The part and the closing part are integrally molded,
A bearing that is provided across the inner peripheral surface of the second cylindrical portion and the outer peripheral surface of the shaft and supports the shaft;
The brake device according to claim 1. 前記ピストンは、前記第２方向側の端面から前記第１方向側へ凹んだ形状を有し、
前記付勢部材は、前記ピストンの内部に収納されている、
請求項２に記載のブレーキ装置。 The piston has a shape recessed from the end surface on the second direction side toward the first direction side,
The biasing member is housed inside the piston.
The brake device according to claim 2.
JP2007276478A 2007-10-24 2007-10-24 Brake device Active JP5132251B2 (en)

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PCT/JP2008/065881 WO2009054189A1 (en) 2007-10-24 2008-09-03 Brake device

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JP5689162B1 (en) * 2013-11-18 2015-03-25 株式会社小松製作所 Transmission and work vehicle
JP2017150534A (en) * 2016-02-23 2017-08-31 マツダ株式会社 Friction fastening element and automatic transmission
JP2019143706A (en) * 2018-02-20 2019-08-29 マツダ株式会社 Automatic transmission

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JP2019143707A (en) * 2018-02-20 2019-08-29 マツダ株式会社 Automatic transmission

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JP5689162B1 (en) * 2013-11-18 2015-03-25 株式会社小松製作所 Transmission and work vehicle
WO2015072179A1 (en) * 2013-11-18 2015-05-21 株式会社小松製作所 Transmission and working vehicle
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JP2017150534A (en) * 2016-02-23 2017-08-31 マツダ株式会社 Friction fastening element and automatic transmission
JP2019143706A (en) * 2018-02-20 2019-08-29 マツダ株式会社 Automatic transmission
JP7040105B2 (en) 2018-02-20 2022-03-23 マツダ株式会社 Automatic transmission

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