JPS6388573U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の第１実施例を示しａはその
上半部の縦断側面図、ｂは第１ナツト及び第１ク
ラツチ部の部分横断平面図、第２図はこの考案の
第２実施例を示しａはその上半部の縦断側面図、
ｂは第１ナツト及び第１クラツチ部の軸直角断面
部分図、第３図は第３実施例を示す上半部の縦断
面部分図、第４図は従来の自動隙間調整機構を有
するブレーキ作動器の１例を示す縦断側面図、第
５図は従来の手動緩め機構を有するブレーキ作動
器の１例を示す縦断側面図である。 ３０，３０ａ…シリンダ体（本体）、３１…第
１ピストン、３３…第１ピストン復帰用のばね（
戻しばね）、３５…押棒、３６…自動隙間調整機
構、３７，８３，９２…第１クラツチ、４０…シ
リンダ室、４４…ロツド、４６…（延長部）ロツ
ド、４９…雄ねじ、５０…第１ナツト、５１…第
２ナツト、５２…第１ばね、５４…第２ばね、５
５…制御部材。 Fig. 1 shows a first embodiment of this invention, a is a longitudinal cross-sectional side view of the upper half thereof, b is a partial cross-sectional plan view of the first nut and first clutch portion, and Fig. 2 is a second embodiment of this invention. An example is shown in which a is a longitudinal cross-sectional side view of the upper half of the
b is a partial cross-sectional view perpendicular to the axis of the first nut and the first clutch portion, FIG. 3 is a vertical cross-sectional partial view of the upper half showing the third embodiment, and FIG. 4 is a brake operation having a conventional automatic gap adjustment mechanism. FIG. 5 is a vertical side view showing an example of a conventional brake actuator having a manual release mechanism. 30, 30a... Cylinder body (main body), 31... First piston, 33... Spring for returning the first piston (
return spring), 35...Push rod, 36...Automatic clearance adjustment mechanism, 37, 83, 92...First clutch, 40...Cylinder chamber, 44...Rod, 46...(Extension part) rod, 49...Male thread, 50...First Nut, 51...Second nut, 52...First spring, 54...Second spring, 5
5...Control member.

Claims (1)

【実用新案登録請求の範囲】 本体内に前後方向に移動自在に設けられた筒状
のロツドが移動力を受けることによつて前進し、
該ロツド内に一端が挿入されている押棒をその押
棒と前記ロツドとの間に設けた自動隙間調整機構
を介して前進させてブレーキ力を発生させるよう
に構成され、 前記自動隙間調整機構が、前記押棒外周に第１
ナツト及び第２ナツトを螺合させ、第１ナツトを
第１ばねで前記ロツド側から後方へ押圧すること
によりロツド側に前記押棒回りの回転が拘束され
るように歯合させると共にロツド側から前方へ向
う移動力が押棒へ伝達されるように設け、第２ナ
ツトと前記本体との間に前後方向に所定距離だけ
移動可能に設けられている制御部材に第２ナツト
前側から当接させて前記押棒回りの回転を拘束す
るように歯合させると共にその歯合状態を保持す
るように第２ナツトと制御部材との間に第２ばね
を設けてなるものであるブレーキ作動器において
、 第１ナツトと前記ロツド側との歯合状態を少な
くとも第１ナツトが押棒に沿つて前進する方向の
第１ナツトの回転を係止する結合状態とその係止
を解放する解放状態とに切換える第１クラツチを
第１ナツトと前記ロツド側との間に設けたことを
特徴とするブレーキ作動器。[Claims for Utility Model Registration] A cylindrical rod provided inside the main body so as to be movable in the front and back direction moves forward by receiving a moving force,
The push rod, one end of which is inserted into the rod, is configured to advance through an automatic gap adjustment mechanism provided between the push rod and the rod to generate a braking force, and the automatic gap adjustment mechanism includes: A first
The nut and the second nut are screwed together, and the first nut is pressed backward from the rod side by the first spring, so that the rod side meshes with the rod side so that rotation around the push rod is restrained, and the rod side is pushed forward from the rod side. The second nut is brought into contact with a control member from the front side, which is provided so that a moving force directed toward the push rod is transmitted to the push rod, and which is provided between the second nut and the main body so as to be movable by a predetermined distance in the front-rear direction. A brake actuator in which a second spring is provided between the second nut and the control member so as to mesh with each other so as to restrict rotation around the push rod and maintain the meshed state, the first nut a first clutch that switches the engagement state between the first nut and the rod side at least between a connected state in which rotation of the first nut is locked in a direction in which the first nut advances along the push rod and a released state in which the lock is released; A brake actuator characterized in that it is provided between a first nut and the rod side.