JPS6449672U

JPS6449672U -

Info

Publication number: JPS6449672U
Application number: JP14470887U
Authority: JP
Priority date: 1987-09-21
Filing date: 1987-09-21
Publication date: 1989-03-28

Description

[Brief explanation of drawings]

第１図は本考案の一実施例におけるブレーキの
手動解除装置を備えた油圧モータの要部の断面図
、第２図はシールブツシユの正面図、第３図は第
２のボルトの正面図、第４図は従来の油圧モータ
の断面図である。１……ケーシング、３……シリンダブロツク、
４……ピストン、８……ブレーキ押え板、１０…
…ブレーキピストン、１１……回り止めピン（回
り止め手段）、１２……フリクシヨンプレート、
１３……ばね、１５……ネガテイブブレーキ、１
７……バルブカバー、１８……第１のボルト、２
１……補助カバー、２２……第２のボルト、２８
……第１のボルト穴（ボルト穴）、２９……シー
ルブツシユ、３１，３２……螺孔。 Fig. 1 is a sectional view of the main parts of a hydraulic motor equipped with a manual brake release device according to an embodiment of the present invention, Fig. 2 is a front view of the seal bushing, Fig. 3 is a front view of the second bolt, and Fig. 3 is a front view of the seal bushing. FIG. 4 is a sectional view of a conventional hydraulic motor. 1...Casing, 3...Cylinder block,
4... Piston, 8... Brake holding plate, 10...
...brake piston, 11...rotation pin (rotation prevention means), 12...friction plate,
13... Spring, 15... Negative brake, 1
7... Valve cover, 18... First bolt, 2
1...Auxiliary cover, 22...Second bolt, 28
...First bolt hole (bolt hole), 29...Seal bush, 31, 32...Threaded hole.

Claims

[Scope of utility model registration request]

A friction plate is applied to the outer periphery of a cylinder block housing a plurality of hydraulically actuated pistons by pressing it against a casing by the urging force of a spring, and is pressed against the urging force of the spring by hydraulic pressure. In a hydraulic motor equipped with a negative brake having a brake piston that releases the brake, the first valve cover is attached to the brake holding plate.
At least one pair of bolt holes located approximately on the diameter of the brake retaining plate among the plurality of bolt holes each having a female thread into which the bolt is screwed is penetrated to the surface of the brake retaining plate facing the brake piston. At the same time, a seal bushing having a screw hole opening at the end face on the valve cover side is disposed inside the pair of bolt holes, and a rotation preventing means for preventing rotation of the brake piston is provided on the brake holding plate, A pair of screw holes are screwed into the brake piston and are in line with the pair of bolt holes, and a plurality of second bolts are provided with a diameter smaller than the first bolts and for attaching an auxiliary cover to the valve cover. At least one pair of the bolts is formed to be long, and each pair of first and second bolts is removed from the bolt hole, and the second bolt of the pair is connected to the bolt of the first pair of bolts. The seal bushing is removed from the bolt hole by inserting it into the hole and screwing into the screw hole of the seal bushing, and then inserting a pair of second bolts into the bolt holes of the first pair of bolts to remove the seal bushing from the brake piston. A manual release device for a brake in a hydraulic motor, which is configured to release the brake by pulling the brake piston toward the brake holding plate against the biasing force of the spring by screwing the brake piston into the screw hole.