JPS6266273U - - Google Patents

Description

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

第１図乃至第４図は本考案の実施例を示し、第
１図は要部の断面図、第２図は全体の縦断面図、
第３図及び第４図はそれぞれ別実施例の要部断面
図、第５図は従来例の第２図相当図である。 １…ピストン型空圧発動機、３…プランジヤ式
液圧ポンプ、４…１のピストン、５…３のプラン
ジヤ、６…吸込口、７…吐出口、４２…吸込弁、
４６…吐出弁、４８…プランジヤ室、５０…締切
用小径部、５１…作動液封入部、５２…５０の内
周面、５３…５の外周面、５４…嵌合隙間、Ｄ…
プランジヤ外径。 1 to 4 show an embodiment of the present invention, FIG. 1 is a sectional view of the main part, FIG. 2 is a longitudinal sectional view of the whole,
3 and 4 are sectional views of main parts of different embodiments, respectively, and FIG. 5 is a view corresponding to FIG. 2 of a conventional example. DESCRIPTION OF SYMBOLS 1... Piston type pneumatic engine, 3... Plunger type hydraulic pump, 4... Piston 1, 5... Plunger 3, 6... Suction port, 7... Discharge port, 42... Suction valve,
46...Discharge valve, 48...Plunger chamber, 50...Small diameter part for shutoff, 51...Hydraulic fluid sealing part, 52...Inner circumferential surface of 50, 53...Outer circumferential surface of 5, 54...Fitting gap, D...
Plunger outer diameter.

Claims (1)

【実用新案登録請求の範囲】 １ ピストン型空圧発動機１のピストン４にプラ
ンジヤ型液圧ポンプ３のプランジヤ５を連動連結
し、空圧発動機１のピストン４の作動で液圧ポン
プ３のプランジヤ５を往復動させることにより、
作動液を液圧ポンプ３の吸込口６から吸込弁４２
、プランジヤ室４８、吐出弁４６を経て吐出口７
へ吐出するように構成した空圧ピストン発動式プ
ランジヤ駆動液圧ポンプにおいて、 プランジヤ室４８を形成する内周面のうちプラ
ンジヤ５の往動ストローク終端部に位置する個所
に締切用小径部５０を形成し、締切用小径部５０
での内周面５２とプランジヤ５の外周面５３との
間に作動液の自由な流通を阻止する微小な値の嵌
合隙間５４を形成し、プランジヤ室４８の締切用
小径部５０よりも吸込弁４２側に作動液封入部５
１を形成したことを特徴とする空圧ピストン発動
式プランジヤ駆動液圧ポンプ。 ２ 締切用小径部内周面５２とプランジヤ外周面
５３との嵌合隙間５４の寸法をプランジヤ外径Ｄ
の１／５０以下に形成した実用新案登録請求の範
囲第１項に記載の空圧ピストン発動式プランジヤ
駆動液圧ポンプ。 ３ 締切用小径部内周面５２とプランジヤ外周面
５３との嵌合隙間６４の寸法をプランジヤ外径Ｄ
の１／１００以下に形成した実用新案登録請求の
範囲第１項に記載の空圧ピストン発動式プランジ
ヤ駆動液圧ポンプ。[Claims for Utility Model Registration] 1. A plunger 5 of a plunger type hydraulic pump 3 is interlocked and connected to a piston 4 of a piston type pneumatic engine 1, and the piston 4 of the pneumatic engine 1 operates to operate the hydraulic pump 3. By reciprocating the plunger 5,
The hydraulic fluid is transferred from the suction port 6 of the hydraulic pump 3 to the suction valve 42.
, the plunger chamber 48 and the discharge port 7 via the discharge valve 46.
In the pneumatic piston-driven plunger-driven hydraulic pump configured to discharge water to the piston, a small-diameter shutoff portion 50 is formed at a portion of the inner peripheral surface forming the plunger chamber 48 located at the end of the forward stroke of the plunger 5. Small diameter part 50 for closing
A fitting gap 54 of a minute value is formed between the inner circumferential surface 52 and the outer circumferential surface 53 of the plunger 5 to prevent free flow of the working fluid, and the suction gap is smaller than the small diameter portion 50 for shutoff of the plunger chamber 48. Hydraulic fluid sealing section 5 on the valve 42 side
1. A pneumatic piston-driven plunger-driven hydraulic pump characterized by forming: 2. The dimension of the fitting gap 54 between the inner circumferential surface of the small diameter part for closing 52 and the outer circumferential surface of the plunger 53 is determined by the outer diameter of the plunger D.
The pneumatic piston-driven plunger-driven hydraulic pump according to claim 1, which is formed to be 1/50 or less of the size of the pneumatic piston-driven plunger-driven hydraulic pump. 3. The dimension of the fitting gap 64 between the inner circumferential surface 52 of the small diameter part for shutoff and the outer circumferential surface 53 of the plunger is set to the outer diameter D of the plunger.
The pneumatic piston-driven plunger-driven hydraulic pump according to claim 1, which is formed to be 1/100 or less of the size of the pneumatic piston-driven plunger-driven hydraulic pump.