JPS6317421U - - Google Patents

Info

Publication number
JPS6317421U
JPS6317421U JP10800286U JP10800286U JPS6317421U JP S6317421 U JPS6317421 U JP S6317421U JP 10800286 U JP10800286 U JP 10800286U JP 10800286 U JP10800286 U JP 10800286U JP S6317421 U JPS6317421 U JP S6317421U
Authority
JP
Japan
Prior art keywords
pressure fluid
spring
hydraulic pump
sucks
low
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.)
Granted
Application number
JP10800286U
Other languages
Japanese (ja)
Other versions
JP2520501Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1986108002U priority Critical patent/JP2520501Y2/en
Publication of JPS6317421U publication Critical patent/JPS6317421U/ja
Application granted granted Critical
Publication of JP2520501Y2 publication Critical patent/JP2520501Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Description

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

第１図は本考案の一実施例を示す液圧ポンプ・
モータのケーシングの断面図、第２図はその要部
であるポペツト近傍の拡大断面図、第３図は同じ
部分の他の実施例の拡大断面図、第４図は従来の
ポンプの構造で、過去のデータによりポンプの劣
化度を推定する方法を示す断面図である。 １１…ピストン、１２…シユー、１８…低圧吸
入口、１９…高圧吸入口、３０，３１…連通孔、
３２…ポペツト（弁）、３３…指示棒、３４…ス
プリング、３５，３６…Ｏリング、３７…キヤツ
プ、３８…キヤツプカバー、３９…差動トランス
。 Figure 1 shows a hydraulic pump showing an embodiment of the present invention.
FIG. 2 is an enlarged sectional view of the main part of the motor casing near the poppet, FIG. 3 is an enlarged sectional view of another embodiment of the same part, and FIG. 4 is the structure of a conventional pump. FIG. 3 is a cross-sectional view showing a method of estimating the degree of deterioration of a pump based on past data. 11... Piston, 12... Shu, 18... Low pressure suction port, 19... High pressure suction port, 30, 31... Communication hole,
32...Poppet (valve), 33...Indicator rod, 34...Spring, 35, 36...O ring, 37...Cap, 38...Cap cover, 39...Differential transformer.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 原動機によつて駆動され、低圧の流体を吸入し
、高圧の流体を吐出する液圧ポンプ、あるいは高
圧の流体を吸入し、低圧の流体を吐出することに
より、その軸に回転力を与える液圧モータにおい
て、ばねと、該ばねにより付勢され、ケーシング
内の圧力とばねの弾力との差により移動する弁と
を備えた液圧ポンプ・モータの故障検出装置。 A hydraulic pump driven by a prime mover that sucks in low-pressure fluid and discharges high-pressure fluid, or a hydraulic pump that sucks in high-pressure fluid and discharges low-pressure fluid to exert rotational force on its shaft. A failure detection device for a hydraulic pump motor, which includes a spring and a valve that is biased by the spring and moves due to the difference between the pressure in the casing and the elasticity of the spring.
JP1986108002U 1986-07-16 1986-07-16 Abnormality detection and damage prevention device for hydraulic pump or motor Expired - Lifetime JP2520501Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986108002U JP2520501Y2 (en) 1986-07-16 1986-07-16 Abnormality detection and damage prevention device for hydraulic pump or motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986108002U JP2520501Y2 (en) 1986-07-16 1986-07-16 Abnormality detection and damage prevention device for hydraulic pump or motor

Publications (2)

Publication Number Publication Date
JPS6317421U true JPS6317421U (en) 1988-02-05
JP2520501Y2 JP2520501Y2 (en) 1996-12-18

Family

ID=30984793

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986108002U Expired - Lifetime JP2520501Y2 (en) 1986-07-16 1986-07-16 Abnormality detection and damage prevention device for hydraulic pump or motor

Country Status (1)

Country Link
JP (1) JP2520501Y2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003301810A (en) * 2002-02-07 2003-10-24 Shin Caterpillar Mitsubishi Ltd Hydraulic pump device
JP2004100846A (en) * 2002-09-10 2004-04-02 Shin Caterpillar Mitsubishi Ltd Hydraulic circuit equipped with hydraulic pump
WO2019054234A1 (en) * 2017-09-12 2019-03-21 日立建機株式会社 Construction machinery

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5983811A (en) * 1982-11-02 1984-05-15 Hitachi Constr Mach Co Ltd Fault diagnostic device of hydraulic apparatus
JPS61123787A (en) * 1984-11-16 1986-06-11 Mitsubishi Heavy Ind Ltd Abnormality monitoring device for hydraulic equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5983811A (en) * 1982-11-02 1984-05-15 Hitachi Constr Mach Co Ltd Fault diagnostic device of hydraulic apparatus
JPS61123787A (en) * 1984-11-16 1986-06-11 Mitsubishi Heavy Ind Ltd Abnormality monitoring device for hydraulic equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003301810A (en) * 2002-02-07 2003-10-24 Shin Caterpillar Mitsubishi Ltd Hydraulic pump device
JP2004100846A (en) * 2002-09-10 2004-04-02 Shin Caterpillar Mitsubishi Ltd Hydraulic circuit equipped with hydraulic pump
WO2019054234A1 (en) * 2017-09-12 2019-03-21 日立建機株式会社 Construction machinery

Also Published As

Publication number Publication date
JP2520501Y2 (en) 1996-12-18

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