JP3882160B2 - Gearbox parking mechanism - Google Patents

Gearbox parking mechanism Download PDF

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Publication number
JP3882160B2
JP3882160B2 JP20491199A JP20491199A JP3882160B2 JP 3882160 B2 JP3882160 B2 JP 3882160B2 JP 20491199 A JP20491199 A JP 20491199A JP 20491199 A JP20491199 A JP 20491199A JP 3882160 B2 JP3882160 B2 JP 3882160B2
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JP
Japan
Prior art keywords
transmission
fixed shaft
pin
parking
cam surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP20491199A
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Japanese (ja)
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JP2001030882A (en
Inventor
功治 船橋
浩基 中西
昌宏 浅利
リ・キョンチョル
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aichi Machine Industry Co Ltd
JATCO Ltd
Original Assignee
Aichi Machine Industry Co Ltd
JATCO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Aichi Machine Industry Co Ltd, JATCO Ltd filed Critical Aichi Machine Industry Co Ltd
Priority to JP20491199A priority Critical patent/JP3882160B2/en
Publication of JP2001030882A publication Critical patent/JP2001030882A/en
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Publication of JP3882160B2 publication Critical patent/JP3882160B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • General Details Of Gearings (AREA)

Description

【0001】
【産業上の利用分野】
この発明は、変速機のパーキング機構に関するものである。
【0002】
【従来の技術及びその課題】
従来、変速機のパーキング機構を構成する固定軸54は、図4の要部拡大断面図で示すように、変速機のケース51に両持ち固定されたものとなっている。即ち、変速機のケース51には外側へ突出してフランジ部52が形成されており、このフランジ部52に貫通孔53が形成されて、この貫通孔53を通し外側よりケース51の内部に向かって固定軸54が挿入され、この時に固定軸54の外周にシール剤55を設けて、このシール剤55によりオイル漏れを防ぐように構成し、前記フランジ部52に形成したピン孔56内にスプリングピン57を圧入させて、このスプリングピン57で固定軸54の軸方向及び周方向の位置決め固定と抜け止めとを行っており、このスプリングピン57は変速機のケース51のフランジ部52,52に両持ち状に固定されたものとなっている。
【0003】
このように従来では、パーキング機構を構成する固定軸54が変速機のケース51に両持ち状に固定されたスプリングピン57により位置決め固定されたものであるため、スプリングピン57を固定する部分のスペースが大となり、変速機が大型のものとなってしまうという問題点があった。また、スプリングピン57には抜け止めがないため、過酷な運転状況で使用されてこのスプリングピン57がピン孔56から抜けた時には、パーキングロッドからの衝撃荷重により固定軸54が回転してパーキング機構が機能しない状態が生じたり、また、最悪、回転軸54が抜けてしまった場合には、オイル漏れが発生してしまうという問題点があった。
【0004】
【課題を解決するための手段】
本発明は上記従来の問題点に鑑み案出したものであって、固定軸を変速機のケースに固定させるスペースが小さくてすみ、また、ピンが抜けることのない変速機のパーキング機構を提供せんことを目的とし、その第1の要旨は、先端にカム面が形成されたロッドと、一端側にパーキングギヤの歯部に係合可能な係合爪が形成されるとともに他端側に前記カム面が当接する作動爪が形成されポールシャフトを中心に揺動可能なパーキングポールと、前記ロッドの軸中心線に対して、前記カム面と前記作動爪との接触部とは反対側で前記パーキングギヤからの入力を前記カム面を介して受ける荷重点が形成された固定軸と、を備える変速機のパーキング機構において、前記荷重点前記固定軸の軸中心線上に形成すると共に、変速機のケースに片持ち固定されたピンにより前記固定軸を位置決め固定したことである。
また、第の要旨は、前記ピンは、前記変速機のケースの外側より油密状に螺合されるボルトと、該変速機のケース内で前記固定軸に隣接して配置されたピストンリテーナ部材の外周との間に挟み込むことで抜止めされていることである。
【0005】
【実施例】
以下、本発明の実施例を図面に基づいて説明する。
図1は、変速機のパーキング機構の要部概略構成図であり、また図2は、図1の平面概略構成図である。
【0006】
図において、ケースに固定されたポールシャフト1に揺動可能に設けられたパーキングポール2の一端側には係合爪2aが形成されて、この係合爪2aがパーキングギヤ3の外周の歯部に係合可能に構成されており、また、パーキングポール2の他端側には作動爪2bが形成されて、この作動爪2bがロッド4の先端のカム面4aに当接するように構成されており、カム面4aの先端は大径の大径部4bとなっており、ロッド4は、固定軸5に形成された凹部5a内に挿入され、凹部5aの底側は傾斜状の傾斜部5cに形成されており、また、前記作動爪2bと反対側の凹部5aの内壁面には、図1に示すように、固定軸5の軸中心線上にロッド4の大径部4bと小径部4cとが常に当接する荷重点5bが形成されている。即ち、凹部5aの傾斜部5cの一端は、固定軸5の軸中心線上に設けられており、傾斜部5cの角度はカム面4aの大径部4bと小径部4cとが干渉しないよう設定されており、荷重点5bでロッド4が常に当接するようになっている。従って、前記パーキングギヤ3が回転している場合等で、パーキングポール2の係合爪2aが噛み合わない状態の時などに、図1のaで示すような衝撃力が係合爪2aに作用し、反対側の作動爪2bにはbの矢印で示す衝撃荷重が加わり、この衝撃荷重はロッド4を介し荷重点5bに作用するが、荷重点5bは固定軸5の軸中心線上に形成されているため、bの衝撃荷重が加わった場合にも固定軸5に回転モーメントは殆ど発生せず、また、回転モーメントが発生したとしても微小なため、固定軸5を変速機のケース10に片持ち固定しているピン6には剪断荷重が働かない。
【0007】
固定軸5を変速機のケース10に片持ち固定するピン6は、図3において図2のA−A線断面図で示すように、外側より、変速機のケース10に形成された通し孔10aを通して固定軸5に挿入されて、固定軸5をケース10に位置決め固定するものであり、ピン6はケース10及び固定軸5の貫通孔5dに圧入されている。その後に、通し孔10aにはケース10の外側より盲ボルト11が螺合されて、この盲ボルト11の外周にOリング12を介在させ、盲ボルト11を締め付けることにより、Oリング12により油漏れを防ぐことができるように構成され、前記ピン6は、この盲ボルト11の内端と、ケース10内に回転不能に設けられたローアンドリバースブレーキ用のピストンリテーナ13の外周間に挟み込まれて配置され、これによりピン6の抜け止めが成されている。
【0008】
このように本例では、固定軸5のロッド4からの荷重点5bを軸中心線上に形成したため、ピン6に働く剪断荷重を微小もしくはゼロにすることができ、1本のピン6により片持ち状態で固定軸5をケース10に位置決め固定することができる。従って、ピン6を固定する部分は1カ所で済み、省スペース化を図ることができ、変速機を小型化させることができるものとなる。また、ピン6は、盲ボルト11の先端と非回転部材であるピストンリテーナ13間で挟み込んで抜け止めした構成であるため、ピン6の抜脱を確実に防止して、固定軸5が回転することを確実に防ぐことができ、パーキング機構を良好に機能させることができるとともに信頼性が向上する。また、さらに、盲ボルト11を螺合させてOリング12で油漏れを確実に防ぐことができ、従来のように、固定軸5の外周にシール剤を設ける必要がなく、固定軸5はケース10内の所定位置に配置させておき、外側よりピン6及び盲ボルト11を挿着して良好に固定軸5を位置決め固定できるものとなる。
【0009】
【発明の効果】
本発明の変速機のパーキング機構は、先端にカム面が形成されたロッドと、一端側にパーキングギヤの歯部に係合可能な係合爪が形成されるとともに他端側に前記カム面が当接する作動爪が形成されポールシャフトを中心に揺動可能なパーキングポールと、前記ロッドの軸中心線に対して、前記カム面と前記作動爪との接触部とは反対側で前記パーキングギヤからの入力を前記カム面を介して受ける荷重点が形成された固定軸と、を備える変速機のパーキング機構において、前記荷重点前記固定軸の軸中心線上に形成すると共に、変速機のケースに片持ち固定されたピンにより前記固定軸を位置決め固定したことにより、衝撃荷重が加わった場合にも固定軸に回転モーメントは殆ど発生せず、また、回転モーメントが発生したとしても微小なため、固定軸の固定構造を簡素化できて省スペース化を図ることができるものとなる。
また、ピンに働く剪断荷重を微小もしくはゼロにすることができ、1本のピンにより片持ち状態で固定軸をケースに位置決め固定することができるため、ピンを固定する部分は1カ所で済み、省スペース化を図ることができ、変速機を小型化させることができるものとなる。
【0010】
また、前記ピンは、前記変速機のケースの外側より油密状に螺合されるボルトと、該変速機のケース内で前記固定軸に隣接して配置されたピストンリテーナ部材の外周との間に挟み込むことで抜止めされていることにより、ピンの抜脱を確実に防止して、固定軸が回転することを確実に防ぐことができ、パーキング機構を良好に機能させることができるとともに信頼性が向上する。
【図面の簡単な説明】
【図1】 変速機のパーキング機構の要部概略構成図である。
【図2】 図1の平面概略構成図である。
【図3】 図2のA−A線断面拡大構成図である。
【図4】 従来のケースに対する固定軸の位置決め固定状態の要部断面図である。
【符号の説明】
1 ポールシャフト
2 パーキングポール
2a 係合爪
2b 作動爪
3 パーキングギヤ
4 ロッド
4a カム面
5 固定軸
5a 凹部
5b 荷重点
5c 傾斜部
5d 貫通孔
6 ピン
10 変速機のケース
10a 通し孔
11 盲ボルト
12 Oリング
13 ピストンリテーナ
[0001]
[Industrial application fields]
The present invention relates to a parking mechanism for a transmission.
[0002]
[Prior art and problems]
Conventionally, the fixed shaft 54 constituting the parking mechanism of the transmission is fixed at both ends to the case 51 of the transmission as shown in the enlarged sectional view of the main part in FIG. That is, the case 51 of the transmission protrudes outwardly and is formed with a flange portion 52, and a through hole 53 is formed in the flange portion 52, and passes through the through hole 53 toward the inside of the case 51. The fixed shaft 54 is inserted, and at this time, a sealing agent 55 is provided on the outer periphery of the fixed shaft 54 so that oil leakage is prevented by the sealing agent 55, and a spring pin is inserted into a pin hole 56 formed in the flange portion 52. 57 is press-fitted, and the axial and circumferential positioning and fixing of the fixed shaft 54 are carried out by this spring pin 57, and the spring pin 57 is fixed to the flange portions 52, 52 of the case 51 of the transmission. It is fixed to a holding form.
[0003]
Thus, conventionally, since the fixed shaft 54 constituting the parking mechanism is positioned and fixed by the spring pin 57 fixed to the case 51 of the transmission in a doubly supported manner, the space of the portion for fixing the spring pin 57 is fixed. However, there is a problem that the transmission becomes large. Further, since the spring pin 57 is not prevented from being detached, when the spring pin 57 is used in a severe driving situation and is removed from the pin hole 56, the fixed shaft 54 is rotated by an impact load from the parking rod, and the parking mechanism is operated. Has a problem that oil leakage occurs when a state where the motor does not function occurs or, in the worst case, the rotating shaft 54 comes off.
[0004]
[Means for Solving the Problems]
The present invention has been devised in view of the above-described conventional problems, and requires only a small space for fixing the fixed shaft to the case of the transmission, and does not provide a parking mechanism for the transmission in which the pin does not come off. The first gist of the present invention is that a rod having a cam surface formed at the tip, an engagement claw capable of engaging with a tooth portion of the parking gear at one end, and the cam at the other end are formed. An operation claw with which the surface abuts is formed, and a parking pole that can swing around a pole shaft, and an axial center line of the rod on the opposite side of the contact portion between the cam surface and the operation claw in parking mechanism comprising a fixed shaft load point it is formed which receives an input from the parking gear through the cam surface, and to form the said load point on the axial center line of the fixed shaft, the transmission In the case of By having a fixed pin is that the positioning and fixing the fixing shaft.
According to a second aspect of the present invention, the pin includes a bolt screwed in an oil-tight manner from the outside of the transmission case, and a piston retainer disposed adjacent to the fixed shaft in the transmission case. That is, it is secured by being sandwiched between the outer periphery of the member.
[0005]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a main part of a parking mechanism of a transmission, and FIG. 2 is a schematic plan configuration diagram of FIG.
[0006]
In the figure, an engaging claw 2 a is formed on one end side of a parking pole 2 that is swingably provided on a pole shaft 1 fixed to the case, and this engaging claw 2 a is a tooth portion on the outer periphery of the parking gear 3. In addition, an operating claw 2b is formed on the other end side of the parking pole 2, and the operating claw 2b is configured to come into contact with the cam surface 4a at the tip of the rod 4. The tip of the cam surface 4a is a large diameter portion 4b having a large diameter, the rod 4 is inserted into a recess 5a formed in the fixed shaft 5, and the bottom side of the recess 5a is an inclined inclined portion 5c. Further, on the inner wall surface of the recess 5a opposite to the operating claw 2b, the large diameter portion 4b and the small diameter portion 4c of the rod 4 are arranged on the axial center line of the fixed shaft 5 as shown in FIG. The load point 5b with which is always in contact is formed. That is, one end of the inclined portion 5c of the recess 5a is provided on the axis center line of the fixed shaft 5, and the angle of the inclined portion 5c is set so that the large diameter portion 4b and the small diameter portion 4c of the cam surface 4a do not interfere with each other. The rod 4 is always in contact with the load point 5b. Accordingly, when the parking gear 3 is rotating, etc., when the engaging pawl 2a of the parking pole 2 is not engaged, an impact force as shown by a in FIG. 1 acts on the engaging pawl 2a. The impact claw indicated by the arrow b is applied to the opposite operation claw 2b, and this impact load acts on the load point 5b via the rod 4, but the load point 5b is formed on the axis center line of the fixed shaft 5. Therefore, even when the impact load b is applied, almost no rotational moment is generated on the fixed shaft 5, and even if a rotational moment is generated, the fixed shaft 5 is cantilevered to the case 10 of the transmission. No shear load acts on the pin 6 that is fixed.
[0007]
The pin 6 for cantilever fixing the fixed shaft 5 to the transmission case 10 is a through hole 10a formed in the transmission case 10 from the outside, as shown in FIG. The pin 6 is press-fitted into the case 10 and the through-hole 5d of the fixed shaft 5 so that the fixed shaft 5 is positioned and fixed to the case 10. Thereafter, a blind bolt 11 is screwed into the through hole 10 a from the outside of the case 10, and an O-ring 12 is interposed on the outer periphery of the blind bolt 11. The pin 6 is sandwiched between the inner end of the blind bolt 11 and the outer periphery of a piston retainer 13 for a low and reverse brake provided in the case 10 so as not to rotate. The pin 6 is prevented from coming off.
[0008]
Thus, in this example, since the load point 5b from the rod 4 of the fixed shaft 5 is formed on the axial center line, the shear load acting on the pin 6 can be made minute or zero, and cantilevered by one pin 6 In this state, the fixed shaft 5 can be positioned and fixed to the case 10. Therefore, the pin 6 can be fixed at one place, space can be saved, and the transmission can be downsized. Further, since the pin 6 is sandwiched between the tip of the blind bolt 11 and the piston retainer 13 which is a non-rotating member, the pin 6 is reliably prevented from being pulled out and the fixed shaft 5 rotates. This can be reliably prevented, the parking mechanism can be made to function well, and the reliability is improved. Further, the blind bolt 11 can be screwed together to reliably prevent oil leakage with the O-ring 12, and there is no need to provide a sealant on the outer periphery of the fixed shaft 5 as in the prior art. 10, the pin 6 and the blind bolt 11 are inserted from the outside, and the fixed shaft 5 can be positioned and fixed satisfactorily.
[0009]
【The invention's effect】
In the parking mechanism of the transmission according to the present invention, a rod having a cam surface formed at the tip, an engaging claw capable of engaging with a tooth portion of the parking gear on one end side, and the cam surface on the other end side are formed. A parking pawl having an abutment operating claw and swingable about a pole shaft, and the parking gear on a side opposite to a contact portion between the cam surface and the operating claw with respect to an axial center line of the rod in the parking mechanism for a transmission and a fixed shaft load point is formed for receiving via the cam surface inputs from, and forming the load point on the axial center line of the fixed shaft, the transmission case in by the positioning and fixing the stationary shaft by a cantilever fixed pin, rotation moment to the fixed shaft even when the impact load is applied is hardly generated, and also a rotational moment is generated fine Such reason, simplifies the fixing structure of the fixed shaft becomes capable of achieving space saving.
In addition, the shear load acting on the pin can be made minute or zero, and the fixed shaft can be positioned and fixed to the case in a cantilevered state with one pin. Space can be saved and the transmission can be reduced in size.
[0010]
The pin is between a bolt screwed in an oil-tight manner from the outside of the transmission case and an outer periphery of a piston retainer member disposed adjacent to the fixed shaft in the transmission case. The pin is securely removed by pinching it, so that the pin can be reliably prevented from being pulled out and the fixed shaft can be reliably prevented from rotating, allowing the parking mechanism to function well and being reliable. Will improve.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a main part of a parking mechanism of a transmission.
FIG. 2 is a schematic plan view of the configuration of FIG.
3 is an enlarged sectional view taken along line AA in FIG. 2. FIG.
FIG. 4 is a cross-sectional view of a main part in a fixed positioning state of a fixed shaft with respect to a conventional case.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pole shaft 2 Parking pole 2a Engagement claw 2b Actuation claw 3 Parking gear 4 Rod 4a Cam surface 5 Fixed shaft 5a Concave 5b Load point 5c Inclination part 5d Through-hole 6 Pin 10 Transmission case 10a Through hole 11 Blind bolt 12 O Ring 13 piston retainer

Claims (2)

先端にカム面が形成されたロッドと、
一端側にパーキングギヤの歯部に係合可能な係合爪が形成されるとともに他端側に前記カム面が当接する作動爪が形成されポールシャフトを中心に揺動可能なパーキングポールと、
前記ロッドの軸中心線に対して、前記カム面と前記作動爪との接触部とは反対側で前記パーキングギヤからの入力を前記カム面を介して受ける荷重点が形成された固定軸と、
を備える変速機のパーキング機構において、
前記荷重点前記固定軸の軸中心線上に形成すると共に、変速機のケースに片持ち固定されたピンにより前記固定軸を位置決め固定したことを特徴とする変速機のパーキング機構。
A rod with a cam surface formed at the tip;
A parking pawl which is formed with an engaging claw capable of engaging with a tooth portion of the parking gear on one end side and an operating claw with which the cam surface abuts on the other end side, and which can swing around a pole shaft;
A fixed shaft formed with a load point that receives an input from the parking gear via the cam surface on the opposite side of the contact portion between the cam surface and the operation claw with respect to the axial center line of the rod ;
In a parking mechanism of a transmission comprising:
A parking mechanism for a transmission, wherein the load point is formed on an axis center line of the fixed shaft, and the fixed shaft is positioned and fixed by a pin that is cantilevered to a case of the transmission.
前記ピンは、前記変速機のケースの外側より油密状に螺合されるボルトと、該変速機のケース内で前記固定軸に隣接して配置されたピストンリテーナ部材の外周との間に挟み込むことで抜止めされていることを特徴とする請求項に記載の変速機のパーキング機構。The pin is sandwiched between a bolt screwed in an oil-tight manner from the outside of the transmission case and an outer periphery of a piston retainer member disposed adjacent to the fixed shaft in the transmission case. The parking mechanism for a transmission according to claim 1 , wherein the parking mechanism is prevented from being pulled out.
JP20491199A 1999-07-19 1999-07-19 Gearbox parking mechanism Expired - Lifetime JP3882160B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20491199A JP3882160B2 (en) 1999-07-19 1999-07-19 Gearbox parking mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20491199A JP3882160B2 (en) 1999-07-19 1999-07-19 Gearbox parking mechanism

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JP2001030882A JP2001030882A (en) 2001-02-06
JP3882160B2 true JP3882160B2 (en) 2007-02-14

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