JPH0212310Y2 - - Google Patents
Info
- Publication number
- JPH0212310Y2 JPH0212310Y2 JP1984095357U JP9535784U JPH0212310Y2 JP H0212310 Y2 JPH0212310 Y2 JP H0212310Y2 JP 1984095357 U JP1984095357 U JP 1984095357U JP 9535784 U JP9535784 U JP 9535784U JP H0212310 Y2 JPH0212310 Y2 JP H0212310Y2
- Authority
- JP
- Japan
- Prior art keywords
- pump
- control
- axial piston
- oil
- relief valve
- 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.)
- Expired
Links
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は斜板式アキシヤルピストンポンプの
冷却装置に関する。[Detailed Description of the Invention] Industrial Application Field This invention relates to a cooling device for a swash plate type axial piston pump.
従来の技術
従来この種のポンプでは容積効率を上げるた
め、シリンダブロツクと弁板などの摺動部より油
漏れが生じるのを極力少なくしていた。Prior Art Conventionally, in order to increase the volumetric efficiency of this type of pump, oil leakage from sliding parts such as the cylinder block and valve plate was minimized.
考案が解決しようとする問題点
しかし摺動部の油漏れを少なくすると容積効率
は上るが、漏れ量の減少からケース内部の油温が
上昇して油が劣化したり、摺動部に油不足をきた
して焼付きや異常摩耗が発生するなどの不具合が
生じた。Problems that the invention aims to solve However, although reducing oil leakage from sliding parts improves volumetric efficiency, the reduction in the amount of leakage may cause the oil temperature inside the case to rise, resulting in oil deterioration or lack of oil in the sliding parts. This caused problems such as seizure and abnormal wear.
このため従来ではチヤージポンプの吐出圧をピ
ストンポンプ内へ供給したり、圧油供給手段より
切換え弁を介してピストンポンプ内へ圧油を供給
することにより摺動面を強制的に潤滑するように
したものが、例えば実開昭57−78785号公報や特
公昭55−47229号公報により提案されている。 For this reason, in the past, the sliding surfaces were forced to be lubricated by supplying the discharge pressure of the charge pump into the piston pump, or by supplying pressure oil from the pressure oil supply means into the piston pump via a switching valve. Such methods have been proposed, for example, in Japanese Utility Model Application Publication No. 57-78785 and Japanese Patent Publication No. 55-47229.
しかし上記従来の方法では、潤滑のために別に
チヤージポンプや切換え弁を設けているため、装
置自体が高価となるなどの不具合があつた。 However, in the conventional method described above, since a charge pump and a switching valve are separately provided for lubrication, the device itself becomes expensive.
この考案は上記不具合を改善する目的でなされ
たものである。 This invention was made for the purpose of improving the above-mentioned problems.
問題点を解決するための手段及び作用
この考案は上記目的を達成するために、アキシ
ヤルピストンポンプの制御機構へ供給される制御
油圧を調圧するリリーフ弁からリリーフされた油
を、アキシヤルピストンポンプのケース内へ供給
して、各摺動部の冷却及び潤滑を行うようにした
ものである。Means and Action for Solving the Problems In order to achieve the above object, this invention uses the oil relieved from the relief valve that regulates the control hydraulic pressure supplied to the control mechanism of the axial piston pump to control the axial piston pump. It is designed to cool and lubricate each sliding part by supplying it to the inside of the case.
実施例
この考案を図示の一実施例を参照して詳述する
と、第１図は２基の斜板式アキシヤルピストンポ
ンプ１，２をタンデム接続したものの外観図で、
駆動部３にはさらに制御ポンプ４が連動されてい
て、この制御ポンプ４より吐出された制御油圧は
リリーフ弁５により一定圧に調圧された後上記各
ポンプ１，２の斜板１ａ，２ａを制御する制御機
構１ｂ，２ｂへ供給されて、これら制御機構１
ｂ，２ｂにより斜板傾転角が制御される。Embodiment This invention will be described in detail with reference to an illustrated embodiment. FIG. 1 is an external view of two swash plate type axial piston pumps 1 and 2 connected in tandem.
A control pump 4 is further linked to the drive unit 3, and the control oil pressure discharged from the control pump 4 is regulated to a constant pressure by a relief valve 5, and then applied to the swash plates 1a, 2a of each of the pumps 1, 2. are supplied to control mechanisms 1b and 2b that control these control mechanisms 1
The swash plate tilt angle is controlled by b and 2b.
一方第２図は回路図で、各ピストンポンプ１，
２より吐出された油圧は図示しない操作弁を介し
て作業機などの負荷へ供給されると共に、リリー
フ弁５よりリリーフされた油は管路６より各ピス
トンポンプ１，２のケース内へ供給されて、各摺
動部の冷却と潤滑を行つた後ドレン管路７よりタ
ンク８へドレンされるようになつている。 On the other hand, Fig. 2 is a circuit diagram, and each piston pump 1,
The hydraulic pressure discharged from the piston pump 2 is supplied to a load such as a working machine via an operation valve (not shown), and the oil relieved from the relief valve 5 is supplied to the case of each piston pump 1, 2 through a pipe 6. After cooling and lubricating each sliding part, the water is drained from a drain pipe 7 to a tank 8.
なお上記実施例ではタンデム接続された２ポン
プに実施した例であるが、第３図に示すような並
列接続されたポンプ１，２や第３図に示すように
１基のピストンポンプ１と制御ポンプ４を備えた
ものなどにも同様に実施することができるもので
ある。 Although the above embodiment is an example in which two pumps are connected in tandem, control may be performed with pumps 1 and 2 connected in parallel as shown in Fig. 3, or with one piston pump 1 as shown in Fig. 3. The present invention can be similarly applied to a device equipped with a pump 4.
考案の効果
この考案は以上詳述したように、制御ポンプ４
の吐出圧を調圧するリリーフ弁５からリリーフさ
れた油をアキシヤルピストンポンプ１，２のケー
ス内へ供給して、各摺動部の冷却と潤滑を行うよ
うにしたことから、ピストンポンプ１，２の漏れ
量を少なくして容積効率を上げても、ケース内の
温度が上昇して油が劣化したり、摺動の油不足に
より摺動部を焼付いたり、異常摩擦を起すのを未
然に防止できるようになる。Effects of the invention As detailed above, this invention has the control pump 4
The oil relieved from the relief valve 5 that regulates the discharge pressure of the piston pumps 1 and 2 is supplied into the cases of the axial piston pumps 1 and 2 to cool and lubricate each sliding part. Even if the volumetric efficiency is increased by reducing the amount of leakage in step 2, the temperature inside the case will rise and the oil will deteriorate, and the sliding parts will seize due to lack of oil in the sliding parts, and abnormal friction will occur. This can be prevented.
また従来のように潤滑のためにチヤージポンプ
や切換え弁を設ける必要がないことから、安価に
提供することもできる。 Further, since there is no need to provide a charge pump or a switching valve for lubrication as in the conventional case, it can be provided at low cost.
図面はこの考案の一実施例を示し、第１図は全
体図、第２図は回路図、第３図及び第４図は他の
実施例を示す回路図である。
１，２はアキシヤルピストンポンプ、４は制御
ポンプ、５はリリーフ弁。
The drawings show one embodiment of this invention; FIG. 1 is an overall view, FIG. 2 is a circuit diagram, and FIGS. 3 and 4 are circuit diagrams showing other embodiments. 1 and 2 are axial piston pumps, 4 is a control pump, and 5 is a relief valve.
Claims (1)
と、制御ポンプ４を備え、かつ制御ポンプ４の吐
出圧をリリーフ弁５で調圧した後上記アキシヤル
ピストンポンプ１，２の制御機構１ｂ，２ｂへ供
給して斜板傾転角を制御するものにおいて、上記
リリーフ弁５よりリリーフされた油を上記アキシ
ヤルピストンポンプ１，２の各ケース内へ供給し
てなるアキシヤルピストンポンプの冷却装置。 At least one axial piston pump 1,2
and a control pump 4, and after regulating the discharge pressure of the control pump 4 with a relief valve 5, it is supplied to the control mechanisms 1b and 2b of the axial piston pumps 1 and 2 to control the swash plate tilt angle. A cooling device for an axial piston pump, which supplies oil relieved from the relief valve 5 into each case of the axial piston pumps 1 and 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9535784U JPS6110980U (en) | 1984-06-27 | 1984-06-27 | Axial piston pump cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9535784U JPS6110980U (en) | 1984-06-27 | 1984-06-27 | Axial piston pump cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6110980U JPS6110980U (en) | 1986-01-22 |
| JPH0212310Y2 true JPH0212310Y2 (en) | 1990-04-06 |
Family
ID=30654446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9535784U Granted JPS6110980U (en) | 1984-06-27 | 1984-06-27 | Axial piston pump cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6110980U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2520689Y2 (en) * | 1989-03-09 | 1996-12-18 | カヤバ工業株式会社 | Pumping unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49112204A (en) * | 1973-02-13 | 1974-10-25 | ||
| JPS5547229A (en) * | 1978-09-25 | 1980-04-03 | Ppg Industries Inc | Glass sheet strengthening method and its device |
| JPS57144345A (en) * | 1981-03-02 | 1982-09-06 | Hitachi Constr Mach Co Ltd | Pump control type oil-pressure closed circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5778785U (en) * | 1980-10-31 | 1982-05-15 | ||
| JPS5787180U (en) * | 1980-11-19 | 1982-05-29 |
-
1984
- 1984-06-27 JP JP9535784U patent/JPS6110980U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49112204A (en) * | 1973-02-13 | 1974-10-25 | ||
| JPS5547229A (en) * | 1978-09-25 | 1980-04-03 | Ppg Industries Inc | Glass sheet strengthening method and its device |
| JPS57144345A (en) * | 1981-03-02 | 1982-09-06 | Hitachi Constr Mach Co Ltd | Pump control type oil-pressure closed circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6110980U (en) | 1986-01-22 |
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