JP2606621Y2 - Drum brake clearance adjustment device - Google Patents
Drum brake clearance adjustment deviceInfo
- Publication number
- JP2606621Y2 JP2606621Y2 JP1993030753U JP3075393U JP2606621Y2 JP 2606621 Y2 JP2606621 Y2 JP 2606621Y2 JP 1993030753 U JP1993030753 U JP 1993030753U JP 3075393 U JP3075393 U JP 3075393U JP 2606621 Y2 JP2606621 Y2 JP 2606621Y2
- Authority
- JP
- Japan
- Prior art keywords
- adjusting
- connecting member
- lever
- adjustment
- adjusting lever
- 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 - Fee Related
Links
Landscapes
- Braking Arrangements (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、自動車に使用されるド
ラムブレーキのブレーキドラムとブレーキシューとの間
のシュー間隙を自動的に調整するための装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically adjusting a shoe clearance between a brake drum and a brake shoe of a drum brake used in an automobile.
【０００２】[0002]
【従来の技術】ドラムブレーキのシュー間隙自動調整装
置としては従来、例えば実公平１−41947 号公報に開示
されているごときものが知られている。2. Description of the Related Art As a device for automatically adjusting a shoe clearance of a drum brake, a device disclosed in, for example, Japanese Utility Model Publication No. 1-49474 is known.
【０００３】このシュー間隙自動調整装置は、バックプ
レートに取り付けたシリンダボディ内にピストンを摺動
自在に嵌挿し、該ピストンに、調整歯を有する調整ナッ
トを回動可能に嵌挿すると共に、該調整ナットに螺合さ
せた調整ボルトの前端部でブレーキシューを支承したド
ラムブレーキにおいて、上記シリンダボディの外壁に回
動可能に軸支した調整レバーの一方の腕に、前記調整歯
を一方向のみに回転可能に係合する係合爪を形成すると
共に、他方の腕に、上記ピストンと一体的に動くように
設けられた連結部材の先端面が当接する当接部を形成
し、上記連結部材にコイル部を巻着した調整ばねの両端
フック部をそれぞれ、連結部材の上記先端面が調整レバ
ーの上記当接部に当接されるようこれら連結部材および
調整レバーに掛止し、且つ、調整ばねのばね力により調
整レバーの上記係合爪を前記調整歯に押圧するモーメン
トが発生するよう、連結部材と調整レバーとの当接箇所
を調整ばねの作用線からオフセットさせたものである。In this automatic shoe gap adjusting device, a piston is slidably fitted into a cylinder body attached to a back plate, and an adjusting nut having adjusting teeth is rotatably fitted to the piston. In a drum brake in which a brake shoe is supported by a front end portion of an adjustment bolt screwed to an adjustment nut, the adjustment teeth are provided in only one direction on one arm of an adjustment lever rotatably supported on the outer wall of the cylinder body. Forming an engaging claw that rotatably engages with the other arm, and forming a contact portion with which the distal end surface of a connecting member provided so as to move integrally with the piston contacts the other arm; Hooks on both ends of the adjusting spring with the coil portion wound around the connecting member and the adjusting lever so that the distal end surface of the connecting member abuts on the abutting portion of the adjusting lever. In addition, the contact point between the connecting member and the adjusting lever is offset from the action line of the adjusting spring so that a moment for pressing the engaging claw of the adjusting lever against the adjusting tooth is generated by the spring force of the adjusting spring. is there.
【０００４】[0004]
【考案が解決しようとする課題】ところで上記の実公平
１−41947 号に記載された装置は、連結部材（文献では
49により図示されている）と調整レバー（文献では47に
より図示されている）とを当接させるに際して、これら
両部材にそれぞれ切欠（文献ではそれぞれ49a1および47
e1により図示されている）を形成し、これら切欠を十字
形に交差するよう相互に係合させた状態で連結部材と調
整レバーとを当接させることにより両者間を比較的タイ
トに位置決めするものであった。従って従来は、連結部
材および調整レバーが相互当接箇所において切欠を必要
とするため形状の複雑化を免れず、コスト的に不利にな
る懸念があった。The device described in Japanese Utility Model Publication No. 1-49474 is a connecting member (in the literature).
When the adjusting lever (illustrated by reference numeral 47) is brought into contact with the adjusting lever (illustrated by reference numeral 47), these members are notched (49a1 and 47, respectively).
e1), and a relatively tight positioning between the notches is made by abutting the connecting member and the adjusting lever in a state where these notches are engaged with each other so as to cross each other in a cross shape. Met. Therefore, conventionally, there is a concern that the connecting member and the adjusting lever require notches at the mutual contact points, so that the shape is inevitably complicated, which is disadvantageous in cost.
【０００５】又、ブレーキ作動の度に調整レバーはその
枢支軸を中心に回動し、連結部材および調整レバーの当
接位置は上記の当接箇所において僅かに相対変位する必
要がある。しかし、連結部材および調整レバーの当接位
置が前記の切欠を介した嵌合により位置決めされている
ために、これら両部材間の相対変位が困難で、ブレーキ
作動の度にこれら両部材間にこじりが生じ係合部が摩耗
したり、調整レバーの回動が円滑に行われないといった
問題を生ずる。Further, each time the brake is actuated, the adjusting lever rotates about its pivot shaft, and the contact position of the connecting member and the adjusting lever needs to be slightly displaced at the above-mentioned contact position. However, since the contact positions of the connecting member and the adjustment lever are positioned by fitting through the notch, relative displacement between the two members is difficult, and a twist between the two members is caused each time the brake is actuated. This causes a problem that the engaging portion is worn and that the adjustment lever is not smoothly rotated.
【０００６】更に、組立時や取り扱い中に調整レバーを
大きく回動した場合、前記と同様に当接位置での相対変
位が困難なため、切欠溝巾を大きくしないと切欠溝の外
側爪が変形したり折損したりする。かといって切欠溝巾
を大きくすると今度は、連結部材および調整レバー間の
当接位置が調整レバー回動軸線方向にばらついてしまう
という問題点があった。Further, when the adjusting lever is rotated greatly during assembly or handling, relative displacement at the contact position is difficult similarly to the above, and unless the width of the notch groove is increased, the outer claw of the notch groove is deformed. Torn or broken. However, when the width of the notch groove is increased, there is a problem that the contact position between the connecting member and the adjustment lever is varied in the adjustment lever rotation axis direction.
【０００７】[0007]
【課題を解決するための手段】上述の問題点を解決する
ため本考案によるドラムブレーキの間隙自動調整装置
は、バックプレートに取り付けたシリンダボディ内にピ
ストンを摺動自在に嵌挿し、該ピストンに、調整歯を有
する調整ナットを回動可能に嵌挿すると共に、該調整ナ
ットに螺合させた調整ボルトの前端部でブレーキシュー
を支承し、前記シリンダボディの外壁に回動可能に軸支
した調整レバーの一方の腕に、前記調整歯を一方向のみ
に回転可能に係合する係合爪を形成すると共に、他方の
腕に、前記ピストンと一体的に動くように設けられた連
結部材の先端面が当接する当接部を形成し、前記連結部
材にコイル部を巻着した調整ばねの両端フック部をそれ
ぞれ、連結部材の前記先端面が前記調整レバーの当接部
に当接されるようこれら連結部材および調整レバーに掛
止し、且つ、前記調整ばねのばね力により調整レバーの
前記係合爪を前記調整歯に押圧するモーメントが発生す
るよう、連結部材と調整レバーとの当接箇所を調整ばね
の作用線からオフセットさせてなるドラムブレーキの間
隙自動調整装置において、前記連結部材の先端面、およ
びこの先端面が当接する前記当接部の面をそれぞれ平坦
面とし、調整レバーに掛止すべき調整ばねの一方のフッ
ク部を前記調整レバーの当接部に掛止し、調整ばねの該
一方のフック部および前記コイル部間を連結するよう設
けたストッパー部、或いは該一方のフック部の先端を延
長して設けたストッパー部を、調整レバー回動軸線方向
一方側において前記連結部材の先端面に近い端部に当接
させることにより、または、これら両ストッパー部をそ
れぞれ、調整レバー回動軸線方向両側において前記連結
部材の先端面に近い端部に当接させることにより、調整
レバーの回動に伴う該調整レバーの前記当接部と前記連
結部材の先端面との当接箇所での相対変位を何ら拘束す
ることなく調整レバーの当接部と前記連結部材の先端面
との調整レバー回動軸線方向における相対変位を規制し
得るよう構成したことを特徴とするものである。In order to solve the above-mentioned problems, a drum brake automatic clearance adjusting device according to the present invention slidably inserts a piston into a cylinder body attached to a back plate, and inserts the piston into the cylinder body. An adjusting nut having adjusting teeth is rotatably fitted, and a brake shoe is supported at a front end of an adjusting bolt screwed to the adjusting nut, and is rotatably supported on the outer wall of the cylinder body. One of the arms of the adjusting lever has an engaging claw that rotatably engages the adjusting teeth in only one direction, and the other arm has a connecting member provided to move integrally with the piston. A contact portion with which the distal end surface abuts is formed, and the both end hook portions of the adjusting spring having the coil portion wound around the connecting member, the distal end surface of the connecting member abutting on the abutting portion of the adjusting lever. Yoko A contact portion between the connecting member and the adjusting lever so that a moment is generated to engage the connecting member and the adjusting lever, and to press the engaging claw of the adjusting lever against the adjusting tooth by the spring force of the adjusting spring. In the automatic apparatus for adjusting the clearance of the drum brake, the front end surface of the connecting member and the surface of the contact portion where the front end surface abuts are respectively flat surfaces, and are set on the adjustment lever. A stopper portion which hooks one hook portion of the adjusting spring to be stopped to the contact portion of the adjusting lever and connects the one hook portion of the adjusting spring and the coil portion, or the one hook portion A stopper provided by extending the distal end of the connecting member is brought into contact with an end near the distal end surface of the connecting member on one side in the adjusting lever rotation axis direction, or By bringing the topper portions into contact with the ends near the distal end surface of the connecting member on both sides of the adjusting lever rotation axis direction, the abutting portion of the adjusting lever and the connecting member of the connecting member accompanying the rotation of the adjusting lever are rotated. It is configured such that the relative displacement in the adjusting lever rotation axis direction between the contact portion of the adjusting lever and the distal end surface of the connecting member can be regulated without restricting the relative displacement at the contact point with the distal end surface at all. It is a feature.
【０００８】[0008]
【作用】本考案は上述のように、前記調整レバーの当接
部と前記連結部材の先端面との調整レバー回動軸線方向
における相対変位を、調整レバーに掛止すべき調整ばね
の前記一方のフック部およびコイル部間を連結するよう
設けたストッパー部、または、調整ばねの当該一方のフ
ック部の先端を延長して設けたストッパー部により、或
いはこれら両ストッパー部により規制するため、上記連
結部材の先端面、およびこの先端面が当接する上記当接
部の面をそれぞれ平坦面にしても、調整ばねの一部を利
用して連結部材と調整レバーとの当接状態が保持され得
ることとなり、従って、従来のようにこれら両部材の相
互当接箇所において当接状態を保持するための台形の切
欠を形成する必要がなくなり、当該両部材の形状が複雑
化するのを回避し得て、コスト上の不利益を被る懸念を
払拭することができる。As described above, according to the present invention, the relative displacement between the contact portion of the adjusting lever and the distal end surface of the connecting member in the direction of the adjusting lever rotation axis is the one of the adjusting springs to be hooked to the adjusting lever. A stopper provided to connect the hook portion and the coil portion, or a stopper provided by extending the tip of the one hook portion of the adjusting spring, or the stopper is provided for restricting by the both stopper portions. Even if the tip surface of the member and the surface of the contact portion where the tip surface abuts are respectively flat surfaces, the contact state between the connecting member and the adjustment lever can be maintained by using a part of the adjustment spring. Therefore, it is not necessary to form a trapezoidal notch for maintaining the contact state at the mutual contact point between these two members as in the related art, and it is possible to prevent the shapes of the two members from becoming complicated. Te, it is possible to dispel the concern that suffer the disadvantages of the cost.
【０００９】しかも本考案は、上記した連結部材と調整
レバーとの当接状態の保持のための上記ストッパー部を
特に、調整レバー回動軸線方向一方側または両側におい
て前記連結部材の先端面に近い端部に当接させたから、
当該ストッパー部が、調整レバーの回動に伴う該調整レ
バーの当接部と前記連結部材の先端面との当接箇所での
相対変位を何ら拘束することはなく、ブレーキ作動時に
おける調整レバーの回動に際して生ずる連結部材および
調整レバー間の当接箇所での僅かな相対変位が容易であ
り、ブレーキ作動の度にこれら両部材間にこじりが生じ
て摩耗したり、調整レバーの回動が円滑に行われないと
いった問題も回避することができる。Further, in the present invention, the stopper portion for holding the contact state between the connecting member and the adjusting lever is particularly close to the distal end surface of the connecting member on one or both sides in the adjusting lever rotation axis direction. Because it touched the end,
The stopper portion does not restrict any relative displacement at the contact portion between the contact portion of the adjustment lever and the distal end surface of the connecting member due to the rotation of the adjustment lever, and the stopper portion of the adjustment lever at the time of braking is not actuated. Slight relative displacement at the contact point between the connecting member and the adjusting lever, which occurs during rotation, is easy, and each time the brake is actuated, the two members are twisted and worn, and the rotating of the adjusting lever is smooth. Can be avoided.
【００１０】更に本考案によれば同様の理由から、組立
時や取り扱い中に調整レバーを大きく回動させる場合に
もこの回動が何の支障もなくなされ得るため、連結部材
および調整レバー間の当接箇所が変形したり、折損する
心配もなくなる。Further, according to the present invention, for the same reason, even when the adjusting lever is turned greatly during assembly or handling, the turning can be performed without any trouble. There is no need to worry about the contact points being deformed or broken.
【００１１】[0011]
【実施例】以下、図面に基づいて本考案の実施例を個々
に説明する。図１〜図５は本考案の一実施例を示し、こ
れら図中１（図２参照）は、図示しない車体に取り付け
たバックプレートで、また２はバックプレート１にボル
ト３，４で取り付けたシリンダボディである。シリンダ
ボディ２に一端が開口するよう穿設したシリンダ穴2aに
ピストン５を摺動自在に嵌挿する。そして当該ピストン
５には、露出端面側が開口した外向きの有底穴5aを穿設
し、この有底穴5aに調整ナット６を回動可能に嵌挿し、
該調整ナット６の突端に調整歯輪6aを一体に固着する。
そして調整ナット６には調整ボルト７を螺合し、この調
整ボルト７の前端には図示しないブレーキシューを支承
する係合溝7aが形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be individually described below with reference to the drawings. 1 to 5 show one embodiment of the present invention, in which 1 (see FIG. 2) is a back plate attached to a vehicle body (not shown), and 2 is attached to the back plate 1 with bolts 3 and 4. It is a cylinder body. A piston 5 is slidably inserted into a cylinder hole 2a formed in the cylinder body 2 so that one end is opened. The piston 5 is provided with an outwardly facing bottomed hole 5a having an open end face side, and an adjusting nut 6 is rotatably fitted into the bottomed hole 5a.
An adjustment tooth wheel 6a is integrally fixed to a protruding end of the adjustment nut 6.
An adjustment bolt 7 is screwed into the adjustment nut 6, and an engagement groove 7a for supporting a brake shoe (not shown) is formed at a front end of the adjustment bolt 7.
【００１２】８は調整レバーで、中間部が段付きボルト
９により前記シリンダボディ２の外壁に回動可能に軸支
され、該調整レバー８の一方の腕8aには前記調整歯輪6a
の調整歯を一方向のみに回転可能に係合する係合爪8bを
形成し、他方の腕8cは略直角に折曲して折曲片8dを形成
する。10は連結部材で、基部の円環部10a が前記ピスト
ン５と一体的に動くように設けられ、その円環部10a よ
り伸長した連結腕10b の先端部における端面10c が前記
調整レバー８の折曲片8dの当接部8eと当接する。ここ
で、相互に当接する連結部材10の先端部の端面10c およ
び前記調整レバー８の当接部8eの当接面はそれぞれ平坦
面とし、調整レバー８の回動方向には相互に係合する凹
凸を持たない滑らかな面とする。Numeral 8 denotes an adjusting lever. An intermediate portion is rotatably supported on the outer wall of the cylinder body 2 by a stepped bolt 9 and one arm 8a of the adjusting lever 8 has the adjusting tooth wheel 6a.
An engagement claw 8b that rotatably engages the adjustment tooth in only one direction is formed, and the other arm 8c is bent at a substantially right angle to form a bent piece 8d. A connecting member 10 is provided so that a base annular portion 10a moves integrally with the piston 5, and an end face 10c at a tip end of a connecting arm 10b extending from the annular portion 10a is bent by the folding of the adjusting lever 8. It contacts the contact portion 8e of the bent piece 8d. Here, the end face 10c of the distal end of the connecting member 10 and the abutting face of the abutting portion 8e of the adjusting lever 8 that are in contact with each other are flat surfaces, and engage with each other in the rotating direction of the adjusting lever 8. The surface should be smooth without any irregularities.
【００１３】11（図１〜３参照）は、前記連結部材10に
コイル部11a を巻着した調整ばねで、連結部材10の先端
部における端面10c と調整レバー８の当接部8eの当接面
とを相互に当接させるように、調整ばね11の両端フック
部をそれぞれ連結部材10と調整レバー８の折曲片8dに形
成した切欠8fとに掛止して調整ばね11を連結部材10およ
び調整レバー８間に張設する。又、前記調整ばね11のば
ね力により調整レバー８の係合爪8bを調整歯輪6aの調整
歯に押圧させるモーメントが発生するように、調整ばね
11の作用線Ｘ（図２参照）に対し連結部材10と調整レバ
ー８との当接部をｅだけオフセットさせている。そして
前記調整ばね11のコイル部11a から、調整レバー８に掛
止すべき側のフック部11b に連なるストッパー部11c
が、調整レバー８の回動軸線方向（ボルト９の軸線方
向）における前記連結腕10b の一方の面、つまり図２中
の上面と当接して、連結部材10の同図中上方への移動を
規制している。なお、連結部材10の同図中下方への移動
はこの場合、折曲片8dの段部8gで規制されている。Reference numeral 11 (see FIGS. 1 to 3) denotes an adjusting spring in which a coil portion 11a is wound around the connecting member 10, and a contact between an end face 10c at the distal end of the connecting member 10 and a contact portion 8e of the adjusting lever 8 is provided. The two end hooks of the adjusting spring 11 are engaged with the connecting member 10 and the notch 8f formed in the bent piece 8d of the adjusting lever 8, respectively, so that the surfaces of the adjusting spring 11 come into contact with each other. And between the adjustment levers 8. Further, the adjusting spring is adjusted so that the spring force of the adjusting spring 11 generates a moment to press the engaging claw 8b of the adjusting lever 8 against the adjusting teeth of the adjusting tooth wheel 6a.
The contact portion between the connecting member 10 and the adjustment lever 8 is offset by e from the action line X (see FIG. 2) of FIG. Then, a stopper portion 11c connected from the coil portion 11a of the adjustment spring 11 to the hook portion 11b on the side to be hooked on the adjustment lever 8
Comes into contact with one surface of the connection arm 10b in the rotation axis direction of the adjustment lever 8 (the axis direction of the bolt 9), that is, the upper surface in FIG. 2, and moves the connection member 10 upward in FIG. Regulating. In this case, the downward movement of the connecting member 10 in the figure is restricted by the step 8g of the bent piece 8d.
【００１４】かかる構成によればストッパー部11c が、
連結部材10の先端面10c と調整レバー８の当接部8eとの
調整レバー回動軸線方向（ボルト９の軸線方向）におけ
る相対変位を規制して両者を相互当接状態に保つも、調
整レバー８の回動に伴う両者間の相対変位はこれを何ら
拘束するものでないことから、ブレーキ作動時における
調整レバー8 の回動に際して生ずる連結部材10および調
整レバー8 間の当接箇所での僅かな相対変位が容易であ
り、ブレーキ作動の度にこれら両部材間にこじりが生じ
て摩耗したり、調整レバー８の回動が円滑に行われない
といった問題を解消することができる。12, 13はダスト
カバー、14はＯリング、15はピストンシール、16はエア
ーブリーダである。According to this configuration, the stopper portion 11c is
Although the relative displacement between the distal end face 10c of the connecting member 10 and the contact portion 8e of the adjustment lever 8 in the adjustment lever rotation axis direction (the axis direction of the bolt 9) is maintained, and both are kept in contact with each other, Since the relative displacement between the two members caused by the rotation of the adjusting lever 8 does not restrain the relative displacement between them, a slight displacement occurs at the contact point between the connecting member 10 and the adjusting lever 8 generated when the adjusting lever 8 rotates during the braking operation. Relative displacement is easy, and problems such as abrasion caused by twisting between these two members every time the brake is actuated, and the problem that the adjustment lever 8 is not smoothly rotated can be solved. 12, 13 are dust covers, 14 is an O-ring, 15 is a piston seal, and 16 is an air bleeder.
【００１５】図６，７は本考案の他の実施例で、調整ば
ね21のフック部21b の先端を延長してストッパー部21c
を設け、これを調整レバー回動軸線方向（ボルト９の軸
線方向）において図１〜図３の場合と同じ連結部材10
（詳しくは前記連結腕10b ）の一側面に当接したもの
で、この場合も前記した実施例におけると同様の作用効
果を達成し得る。また図８，９は本考案の更に他の実施
例で、調整ばね31のコイル部からフック部に連なる第１
ストッパー部31c を、図１〜図３の場合と同じ連結部材
10（詳しくは前記連結腕10b ）の一側面に当接させ、調
整ばね31のフック部先端を延長して設けた第２ストッパ
ー部31d を、連結部材10（詳しくは前記連結腕10b ）の
調整レバー回動軸線方向（ボルト９の軸線方向）反対側
の面に当接させて、連結部材10（詳しくは前記連結腕10
b ）を調整レバー回動軸線方向（ボルト９の軸線方向）
のみに位置規制したもので、この場合も前記した実施例
におけると同様の作用効果を達成し得る。FIGS. 6 and 7 show another embodiment of the present invention, in which the tip of the hook 21b of the adjusting spring 21 is extended to form a stopper 21c.
And a connecting member 10 which is the same as that shown in FIGS. 1 to 3 in the adjusting lever rotation axis direction (the axial direction of the bolt 9).
(Specifically, it is in contact with one side surface of the connecting arm 10b.) In this case, the same operation and effect as in the above-described embodiment can be achieved. FIGS. 8 and 9 show still another embodiment of the present invention, in which a first portion extending from the coil portion of the adjusting spring 31 to the hook portion is provided.
The stopper 31c is connected to the same connecting member as in FIGS.
10 (specifically, the connecting arm 10b) is brought into contact with one side surface, and a second stopper portion 31d provided by extending the tip of the hook portion of the adjusting spring 31 is used to adjust the connecting member 10 (specifically, the connecting arm 10b). The connecting member 10 (specifically, the connecting arm 10) is brought into contact with the surface on the opposite side of the lever rotation axis direction (the axis direction of the bolt 9).
b) Adjusting lever rotation axis direction (axial direction of bolt 9)
Only the position is restricted, and in this case, the same operation and effect as in the above-described embodiment can be achieved.
【００１６】[0016]
【考案の効果】本考案は例えば上述のように構成して、
調整レバー８の当接部8eと連結部材10の先端面10c との
調整レバー回動軸線(9) 方向における相対変位を、調整
レバー８に掛止すべき調整ばね11(31)の一方のフック部
およびコイル部間を連結するよう設けたストッパー部11
c(31c)、または調整ばね21(31)の当該一方のフック部の
先端を延長して設けたストッパー部21c(31d)により、或
いはこれら両ストッパー部により規制するため、連結部
材10の先端面10c 、およびこの先端面が当接する当接部
8eの面をそれぞれ平坦面にしても、調整ばね11(21,31)
の一部を利用して連結部材10と調整レバー8 との当接状
態が保持され得ることとなり、従って、従来のようにこ
れら両部材の相互当接箇所において当接状態を保持する
ための切欠を形成する必要がなくなり、当該両部材の形
状が複雑化するのを回避し得て、コスト上の不利益を被
る懸念を払拭することができる。[Effect of the Invention] The present invention is configured as described above, for example,
The relative displacement between the contact portion 8e of the adjusting lever 8 and the distal end face 10c of the connecting member 10 in the direction of the adjusting lever rotation axis (9) is controlled by one hook of an adjusting spring 11 (31) to be hooked on the adjusting lever 8. Stopper part 11 provided to connect between the part and the coil part
c (31c), or the stopper 21c (31d) provided by extending the tip of the one hook of the adjusting spring 21 (31), or the stopper 21c (31d) provided at the tip of the connecting member 10. 10c, and the contact part with which this tip surface contacts
Adjusting spring 11 (21, 31)
The contact state between the connecting member 10 and the adjusting lever 8 can be maintained by using a part of the notch. Therefore, the notch for maintaining the contact state at the mutual contact point between these two members as in the related art can be maintained. Need not be formed, and it is possible to avoid complicating the shapes of the two members, and it is possible to eliminate a concern that cost disadvantages may occur.
【００１７】しかも本考案は、上記した連結部材10と調
整レバー8 との当接状態の保持のための上記ストッパー
部11c(31c)および21c(31d)を特に、調整レバー回動軸線
(9)方向一方側または両側において連結部材10の先端面1
0c に近い端部に当接させたことから、当該ストッパー
部11c(31c)および21c(31d)が、調整レバー8 の回動に伴
う該調整レバー8 の当接部8eと前記連結部材10の先端面
10c との当接箇所での相対変位を何ら拘束することはな
く、ブレーキ作動時における調整レバー8 の回動に際し
て生ずる連結部材10および調整レバー8 間の当接箇所で
の僅かな相対変位が容易であり、ブレーキ作動の度にこ
れら両部材間にこじりが生じて摩耗したり、調整レバー
の回動が円滑に行われないといった問題も回避すること
ができる。Further, in the present invention, in particular, the stopper portions 11c (31c) and 21c (31d) for maintaining the contact state between the connecting member 10 and the adjusting lever 8 are particularly provided with the adjusting lever rotation axis.
(9) Tip surface 1 of connecting member 10 on one side or both sides
Since the stoppers 11c (31c) and 21c (31d) are brought into contact with the ends close to 0c, the stoppers 11c (31c) and 21c (31d) are Tip surface
There is no restriction on the relative displacement at the point of contact with 10c, and the slight relative displacement at the point of contact between the connecting member 10 and the adjusting lever 8 that occurs when the adjusting lever 8 rotates during braking is easy. In addition, it is possible to avoid a problem that the members are twisted and worn between the two members every time the brake is actuated, and that the adjustment lever is not smoothly rotated.
【００１８】更に同様の理由から、組立時や取り扱い中
に調整レバー８を大きく回動させる場合にもこの回動が
何の支障もなくなされ得るため、連結部材10および調整
レバー８間の当接箇所が変形したり、折損する心配もな
くなる。Further, for the same reason, when the adjusting lever 8 is turned largely during assembly or handling, the turning can be performed without any trouble. Therefore, the contact between the connecting member 10 and the adjusting lever 8 is abutted. There is no need to worry about parts being deformed or broken.
【図１】本考案の一実施例を示すドラムブレーキの間隙
自動調整装置に係わる平面図である。FIG. 1 is a plan view of a drum brake automatic gap adjusting device according to an embodiment of the present invention.
【図２】図１の間隙自動調整装置を一部断面としてその
要部を示す正面図である。FIG. 2 is a front view showing a main part of the automatic gap adjusting device of FIG. 1 as a partial cross section.
【図３】図２の装置の右側面図である。FIG. 3 is a right side view of the apparatus of FIG. 2;
【図４】(a) は、調整レバーの平面図であり、(b) は、
その正面図である。FIG. 4A is a plan view of an adjustment lever, and FIG.
It is the front view.
【図５】(a) は、連結部材の平面図であり、(b) は、そ
の正面図である。FIG. 5A is a plan view of a connecting member, and FIG. 5B is a front view thereof.
【図６】本考案の他の実施例を示すドラムブレーキの間
隙自動調整装置に係わる平面図である。FIG. 6 is a plan view of a drum brake automatic gap adjusting device according to another embodiment of the present invention.
【図７】図６に示す間隙自動調整装置の正面図である。FIG. 7 is a front view of the automatic gap adjusting device shown in FIG. 6;
【図８】本考案の更に他の実施例を示すドラムブレーキ
の間隙自動調整装置に係わる平面図である。FIG. 8 is a plan view of a drum brake automatic gap adjusting device according to another embodiment of the present invention.
【図９】図８に示す間隙自動調整装置の正面図である。FIG. 9 is a front view of the automatic gap adjusting device shown in FIG. 8;
１ バックプレート ２ シリンダボディ ３ 取り付けボルト ４ 取り付けボルト ５ ピストン ６ 調整ナット ７ 調整ボルト ８ 調整レバー ８e 当接部 ９ 段付きボルト 10 連結部材 11 調整ばね 12 ダストカバー 13 ダストカバー 14 Ｏリング 15 ピストンシール 16 エアーブリーダ 21 調整ばね 31 調整ばね DESCRIPTION OF SYMBOLS 1 Back plate 2 Cylinder body 3 Mounting bolt 4 Mounting bolt 5 Piston 6 Adjusting nut 7 Adjusting bolt 8 Adjusting lever 8e Contact part 9 Stepped bolt 10 Connecting member 11 Adjusting spring 12 Dust cover 13 Dust cover 14 O-ring 15 Piston seal 16 Air bleeder 21 Adjusting spring 31 Adjusting spring
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F16D 65/56 F16D 65/24 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) F16D 65/56 F16D 65/24
Claims (1)
ディ内にピストンを摺動自在に嵌挿し、該ピストンに、
調整歯を有する調整ナットを回動可能に嵌挿すると共
に、該調整ナットに螺合させた調整ボルトの前端部でブ
レーキシューを支承し、 前記シリンダボディの外壁に回動可能に軸支した調整レ
バーの一方の腕に、前記調整歯を一方向のみに回転可能
に係合する係合爪を形成すると共に、他方の腕に、前記
ピストンと一体的に動くように設けられた連結部材の先
端面が当接する当接部を形成し、 前記連結部材にコイル部を巻着した調整ばねの両端フッ
ク部をそれぞれ、連結部材の前記先端面が前記調整レバ
ーの当接部に当接されるようこれら連結部材および調整
レバーに掛止し、且つ、 前記調整ばねのばね力により調整レバーの前記係合爪を
前記調整歯に押圧するモーメントが発生するよう、連結
部材と調整レバーとの当接箇所を調整ばねの作用線から
オフセットさせてなるドラムブレーキの間隙自動調整装
置において、 前記連結部材の先端面、およびこの先端面が当接する前
記当接部の面をそれぞれ平坦面とし、 調整レバーに掛止すべき調整ばねの一方のフック部を前
記調整レバーの当接部に掛止し、 調整ばねの該一方のフック部および前記コイル部間を連
結するよう設けたストッパー部、或いは該一方のフック
部の先端を延長して設けたストッパー部を、調整レバー
回動軸線方向一方側において前記連結部材の先端面に近
い端部に当接させることにより、 または、これら両ストッパー部をそれぞれ、調整レバー
回動軸線方向両側において前記連結部材の先端面に近い
端部に当接させることにより、 調整レバーの回動に伴う該調整レバーの前記当接部と前
記連結部材の先端面との当接箇所での相対変位を何ら拘
束することなく調整レバーの当接部と前記連結部材の先
端面との調整レバー回動軸線方向における相対変位を規
制し得るよう構成したことを特徴とするドラムブレーキ
の間隙自動調整装置。1. A piston is slidably fitted into a cylinder body attached to a back plate, and the piston is
An adjustment nut having adjustment teeth is rotatably fitted, and a brake shoe is supported at a front end of an adjustment bolt screwed to the adjustment nut, and the rotation nut is rotatably supported on the outer wall of the cylinder body. One end of a lever has an engaging claw for rotatably engaging the adjusting teeth in only one direction, and the other arm has a distal end of a connecting member provided to move integrally with the piston. A contact portion with which a surface abuts is formed, and both end hook portions of the adjusting spring having the coil portion wound around the connecting member are so arranged that the distal end surface of the connecting member is brought into contact with the contact portion of the adjusting lever. A contact portion between the connecting member and the adjusting lever so as to be hooked on the connecting member and the adjusting lever, and generate a moment for pressing the engaging claw of the adjusting lever against the adjusting tooth by the spring force of the adjusting spring. Adjust the spring work In the automatic device for adjusting the gap of a drum brake offset from a line, a tip surface of the connecting member and a surface of the contact portion with which the tip surface abuts are each a flat surface, and an adjusting spring to be hooked on an adjusting lever is provided. A hook portion is engaged with the contact portion of the adjustment lever, and a stopper portion provided to connect the one hook portion and the coil portion of the adjustment spring, or the tip of the one hook portion is extended. By contacting the stopper portion provided on one side of the adjustment lever rotation axis direction with the end portion close to the distal end surface of the connecting member, or by connecting both of these stopper portions to both sides of the adjustment lever rotation axis direction. Abutting the end portion of the connecting member close to the distal end surface, whereby the abutting portion of the adjusting lever and the distal end surface of the connecting member are rotated by the rotation of the adjusting lever. A drum configured to be able to regulate the relative displacement in the adjustment lever rotation axis direction between the contact portion of the adjustment lever and the distal end surface of the connection member without restricting the relative displacement at the contact portion at all. Automatic brake clearance adjustment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993030753U JP2606621Y2 (en) | 1993-06-08 | 1993-06-08 | Drum brake clearance adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993030753U JP2606621Y2 (en) | 1993-06-08 | 1993-06-08 | Drum brake clearance adjustment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH071340U JPH071340U (en) | 1995-01-10 |
| JP2606621Y2 true JP2606621Y2 (en) | 2000-12-18 |
Family
ID=12312449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993030753U Expired - Fee Related JP2606621Y2 (en) | 1993-06-08 | 1993-06-08 | Drum brake clearance adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2606621Y2 (en) |
-
1993
- 1993-06-08 JP JP1993030753U patent/JP2606621Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH071340U (en) | 1995-01-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |