JPS6185776U

JPS6185776U -

Info

Publication number: JPS6185776U
Application number: JP17099384U
Authority: JP
Priority date: 1984-11-13
Filing date: 1984-11-13
Publication date: 1986-06-05

Description

[Brief explanation of the drawing]

第１図ａ，ｂは本考案の一実施例に係る切換え
バルブの正面図、縦断面図、第２図は第１図ｂ中
のＡ−Ａ矢視断面図、第３図ａ，ｂ，ｃはロータ
リバルブ本体の切換え位置を異にする第１図ｂ中
のＢ−Ｂ矢視断面図、第４図は当該切換えバルブ
と油圧駆動系の油圧回路図、第５，６，７図は切
換えバルブの切換え位置を異にする油圧回路図、
第８，９図は従来のホブヘツド旋回装置の概略図
及び内部概略図である。図面中、１はバルブブロツク、３はロータリバ
ルブ本体、５は上部切欠き油路、６は上部貫通油
路、８は下部貫通油路、９，１０は給排油路、１
１，１２は配油路、２５，２６，２９，３０は分
油路、２７，２８は逆止弁、３１，３２は絞り弁
、３３は油圧モータ、３４は切換えソレノイド弁
である。 Figures 1a and b are a front view and longitudinal sectional view of a switching valve according to an embodiment of the present invention, Figure 2 is a sectional view taken along the line A-A in Figure 1b, and Figures 3a, b, c is a sectional view taken along arrow B-B in Fig. 1b with different switching positions of the rotary valve body, Fig. 4 is a hydraulic circuit diagram of the switching valve and hydraulic drive system, and Figs. 5, 6, and 7 are Hydraulic circuit diagram with different switching positions of the switching valve,
8 and 9 are a schematic diagram and an internal diagram of a conventional hob head rotating device. In the drawing, 1 is a valve block, 3 is a rotary valve body, 5 is an upper notch oil passage, 6 is an upper oil passage, 8 is a lower oil passage, 9 and 10 are oil supply and drainage passages, 1
1 and 12 are oil distribution passages, 25, 26, 29, and 30 are oil distribution passages, 27 and 28 are check valves, 31 and 32 are throttle valves, 33 is a hydraulic motor, and 34 is a switching solenoid valve.

Claims

[Scope of utility model registration request]

Two oil supply and drainage passages connected to an oil supply source or an oil discharge part, two oil distribution passages connected to a hydraulic actuator, and two oil supply and drainage passages and two oil distribution passages that are communicated in different combinations. A valve body that takes a total of three switching positions: two positions and one position that cuts off all communication between the oil supply and drainage passages and the oil distribution passage, and the two oil supply and drainage passages and the two oil distribution passages. two pairs of oil branch passages that are connected without going through the valve body, a check valve that is provided in each of one oil branch passage and allows oil to flow only from the oil supply and discharge passage side to the oil distribution passage side, and the other oil distribution passage. A switching valve characterized by comprising a throttle valve provided in each of the branch oil passages.