JPH0237905U

JPH0237905U -

Info

Publication number: JPH0237905U
Application number: JP11381888U
Authority: JP
Priority date: 1988-08-30
Filing date: 1988-08-30
Publication date: 1990-03-13

Description

[Brief explanation of drawings]

第１図はピストンとスプールの相互作用によつ
てピストンを振動せしめる発振機の基本形の例で
、ピストンの外面に上下の加圧室を設けた先願の
概要を示す。第２図は本考案の発振機構の概要、
第３図は本考案を用いたバラストコンパクタの概
要を示す。１…ピストン、２，３…ライナ、４…高圧ポー
ト、５…下加圧室、６…高圧回路、７…小径ニー
ドル、８…スプール、９…上加圧室、１０…交番
回路、１１…低圧回路、１２…タンクポート、１
３…パイロツト回路、１４…大径ニードル、１５
…制御弁、１６…リミツタ、１７…ストローク制
御弁、１８…ストローク制御室、１９…高圧アキ
ユームレータ、２０…低圧アキユームレータ、２
１…油圧シリンダ、２２，２３…ライナ、２４…
ピストン、２５…下加圧室、２６…ロツド、２７
…上加圧室、２８…高圧回路、２９…ポート、３
０…交番回路、３１…交番ポート、３２…高圧ポ
ート、３３…高圧回路、３４…小径ニードル、３
５…スプール、３６…低圧回路、３７…タンクポ
ート、３８…パイロツト回路、３９…大径ニード
ル、４０…ポート、４１…ドレン室、４２…ピス
トンの小径部、４３…バラストコンパクタ、４４
…油圧発振機、４５…クツシヨン、４６…締固め
板、４７…ホース、４８…ハンドル、４９…レー
ル、５０…バラスト、５１…ばね。 FIG. 1 is an example of a basic oscillator that vibrates a piston through interaction between the piston and a spool, and shows an outline of a prior application in which upper and lower pressurized chambers were provided on the outer surface of the piston. Figure 2 shows an overview of the oscillation mechanism of the present invention.
FIG. 3 shows an outline of a ballast compactor using the present invention. 1... Piston, 2, 3... Liner, 4... High pressure port, 5... Lower pressurizing chamber, 6... High pressure circuit, 7... Small diameter needle, 8... Spool, 9... Upper pressurizing chamber, 10... Alternating circuit, 11... Low pressure circuit, 12...Tank port, 1
3...Pilot circuit, 14...Large diameter needle, 15
... Control valve, 16... Limiter, 17... Stroke control valve, 18... Stroke control chamber, 19... High pressure accumulator, 20... Low pressure accumulator, 2
1... Hydraulic cylinder, 22, 23... Liner, 24...
Piston, 25... Lower pressurizing chamber, 26... Rod, 27
...Upper pressurization chamber, 28...High pressure circuit, 29...Port, 3
0... Alternating circuit, 31... Alternating port, 32... High pressure port, 33... High pressure circuit, 34... Small diameter needle, 3
5... Spool, 36... Low pressure circuit, 37... Tank port, 38... Pilot circuit, 39... Large diameter needle, 40... Port, 41... Drain chamber, 42... Small diameter portion of piston, 43... Ballast compactor, 44
...Hydraulic oscillator, 45...Cushion, 46...Compaction plate, 47...Hose, 48...Handle, 49...Rail, 50...Ballast, 51...Spring.

Claims

[Scope of utility model registration request]

A piston is fitted to a liner that is fitted to a hydraulic cylinder, a step is provided between the inner surface of the liner and the outer surface of the piston to form an external pressurizing chamber, and a rod that is fitted to the hydraulic cylinder is fitted inside the hollow of the piston. A step is provided between the inner surface of the piston and the outer surface of the rod to form an inner pressurized chamber, and the inner and outer pressurized chambers are provided so that the fluid pressure acting on the piston is opposed to each other, and one side is always kept as the pressurized chamber. A shortened hydraulic oscillator characterized in that the other is an alternating pressurizing chamber, and fluid pressure is supplied and discharged to and from the alternating pressurizing chamber through interaction between a piston and a spool to vibrate the piston.