JPH0424675U

JPH0424675U -

Info

Publication number: JPH0424675U
Application number: JP6482490U
Authority: JP
Priority date: 1990-06-19
Filing date: 1990-06-19
Publication date: 1992-02-27
Anticipated expiration: 2005-02-22
Also published as: JPH077585Y2

Description

[Brief explanation of the drawing]

図面は本考案の実施例を示すもので、第１図は
タンデム型斜板式油圧ポンプの縦断面図、第２図
は第１図−線断面図、第３図は同油圧ポンプ
のケーシング構造の分解斜視図、第４図は回転方
向を反対に設定したときの第３図相当図、第５図
は変形例に係る第３図相当図、第６図は回転方向
を反対に設定したときの第５図相当図。１……バルブブロツク、２……ケーシング、３
……斜板支持ブロツク、４……斜板、１１，１２
……吐出ポート、１５……吸入ポート、１７，１
８……摺動支持部、２１……第１油路、２２……
第２油路、２３，２４……油圧供給通路、２５，
２６……盲部、２７……連通油通路、２８……絞
り部。 The drawings show an embodiment of the present invention. Fig. 1 is a longitudinal sectional view of a tandem type swash plate hydraulic pump, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 is a casing structure of the hydraulic pump. Exploded perspective view, Figure 4 is a view equivalent to Figure 3 when the rotation direction is set in the opposite direction, Figure 5 is a view equivalent to Figure 3 according to a modified example, and Figure 6 is a view when the rotation direction is set in the opposite direction. A diagram equivalent to Figure 5. 1...Valve block, 2...Casing, 3
... Swash plate support block, 4 ... Swash plate, 11, 12
...Discharge port, 15...Suction port, 17,1
8...Sliding support part, 21...First oil passage, 22...
Second oil passage, 23, 24...hydraulic supply passage, 25,
26... Blind part, 27... Communication oil passage, 28... Throttle part.

Claims

[Claims for Utility Model Registration] (1) A pair of casings each accommodating a valve block and a rotationally driven cylinder block fixed to both sides of the valve block, and one of the swash plates fixed to the end of each casing. In the casing structure of a tandem type swash plate type hydraulic pump, which includes a swash plate support block having a pair of cradle type sliding support parts that are in sliding contact with a pair of cradle type sliding parts, respectively, A pair of first and second oil passages are formed in the swash plate support block, which extend from the valve block side end surface of the casing and open into a pair of sliding support parts, respectively. A hydraulic supply passage that communicates a first oil passage corresponding to a piston on the high pressure side to a discharge port and a blind part that closes an end of a second oil passage corresponding to a piston on the low pressure side of the cylinder block are attached to a pair of casings. They are formed symmetrically so that they correspond to each other, and when the valve block is reversed around the vertical axis and assembled, the first oil passage is closed by the blind part and the second oil passage is connected to the hydraulic pressure supply passage. A casing structure for a tandem type swash plate hydraulic pump. (2) A communicating oil passage that communicates a pair of first and second oil passages formed in each of the above casings and a swash plate support block fixed thereto, and that has a constricted portion, is connected to the casing or the swash plate. A casing structure for a tandem type swash plate hydraulic pump according to claim 1, wherein the casing structure is provided within a support block.