TWM491534U - Pressure-keeping safety device of hydraulic rotary cylinder - Google Patents

Description

油壓迴轉缸保壓安全裝置Hydraulic rotary cylinder pressure maintaining safety device

本新型係涉及一種油壓迴轉缸，尤其是一種油壓迴轉缸保壓安全裝置。The utility model relates to a hydraulic rotary cylinder, in particular to a pressure-preserving safety device for a hydraulic rotary cylinder.

一般油壓迴轉缸用於CNC車床，藉由油壓迴轉缸內的活塞作動，帶動夾頭來產生夾持工件的效果，如圖4及圖5所示，揭露了一種現有的油壓迴轉缸80的結構，其係包括了一缸體81、一活塞82、一迴轉座83、一對導位銷84、一油路裝置85及一罩殼86，其中；Generally, the hydraulic rotary cylinder is used for a CNC lathe, and the piston is actuated by the piston in the hydraulic rotary cylinder to drive the chuck to produce the effect of clamping the workpiece. As shown in FIG. 4 and FIG. 5, a conventional hydraulic rotary cylinder is disclosed. The structure of 80 includes a cylinder 81, a piston 82, a rotating seat 83, a pair of guiding pins 84, an oil passage device 85 and a casing 86, wherein;

該缸體81係於一側開設有一油液槽810，並於該油液槽810的中央底部開設有一供活塞通過的活塞穿孔811，於該缸體81開設有該油液槽810的相同側係穿設有一由側邊連通至該油液槽810的入油道812，該入油道812係接近L形的管道，該活塞82係於外周圍設有一活塞環821，該活塞82係以該活塞環821對應設置於該油液槽810內，並以一端穿入該活塞穿孔811，該活塞82係可沿著該活塞剛811的軸向方向往復作動。The cylinder block 81 has an oil groove 810 on one side, and a piston hole 811 through which the piston passes is opened at the center bottom of the oil groove 810. The same side of the oil groove 810 is opened in the cylinder 81. An oil inlet 812 is connected to the oil tank 810. The oil inlet 812 is adjacent to the L-shaped pipe. The piston 82 is provided with a piston ring 821 around the outer circumference. The piston 82 is provided with a piston ring 821. The piston ring 821 is correspondingly disposed in the oil groove 810, and penetrates the piston through hole 811 at one end. The piston 82 is reciprocally movable along the axial direction of the piston 811.

該迴轉座83係套設於該活塞82異於穿出該活塞穿孔811的一端，並於該迴轉座83鄰近該活塞82的位置設有一控油裝置831及一分別連通該入油道812及該控油裝置831的輸油通道832，該輸油通道832係呈L形的通道，該對導位銷84係對稱地穿設於該活塞82之活塞環821，並以兩端分別固設於該迴轉座83及該缸體81，該油路裝置85係套設於該迴轉座83遠離該缸體81的一側，該油路裝置85係可輸入油液經過由該控油裝置831該輸油通道832、該入油道812進入該油液槽810，進而推動該活塞82作動，該罩殼86係套設於該活塞82、該迴轉座83及該油路裝置85的外側。The rotary seat 83 is sleeved on the end of the piston 82 that is different from the piston bore 811, and an oil control device 831 is disposed adjacent to the piston 82 at the position of the rotary seat 83, and a plurality of oil inlets 812 are respectively connected to the piston An oil delivery channel 832 of the oil control device 831, the oil delivery channel 832 is an L-shaped channel, and the pair of guiding pins 84 are symmetrically disposed through the piston ring 821 of the piston 82, and are fixed at the two ends respectively. The rotary seat 83 and the cylinder 81 are sleeved on a side of the rotary seat 83 away from the cylinder 81. The oil passage device 85 can input oil through the oil control device 831. The passage 832 and the oil inlet passage 812 enter the oil tank 810 to push the piston 82 to move. The casing 86 is sleeved on the outer side of the piston 82, the rotary seat 83 and the oil passage device 85.

現有的油壓迴轉缸80的該輸油通道832及該入油道812均為符合該迴轉座83及該缸體81的外型形成彎折狀態，在加工製造上較為費工且增加製造成本，並且該控油裝置831距離該油液槽810的距離較遠，無法有效地控制油液槽810內的油壓，容易導致該活塞82壓力不足或過大，實有改善之必要。The oil passage 832 and the oil inlet 812 of the conventional hydraulic rotary cylinder 80 are in a state of being bent in conformity with the outer shape of the rotary seat 83 and the cylinder 81, which is laborious in manufacturing and increases the manufacturing cost. Moreover, the distance between the oil control device 831 and the oil tank 810 is too long, and the oil pressure in the oil bath 810 cannot be effectively controlled, which tends to cause insufficient or excessive pressure of the piston 82, which is necessary for improvement.

為了解決現有油壓迴轉缸製造成本較高以及油壓控制不佳的問題，本新型的主要目的在於提供一種油壓迴轉缸保壓安全裝置，其係利用具有壓力控制效果的自鎖閥體組替代原先的輸油通道，並可協助內部油液壓力的控制，能夠降低生產成本並提供油液保壓的效果。In order to solve the problem of high manufacturing cost and poor oil pressure control of the existing hydraulic rotary cylinder, the main purpose of the present invention is to provide a hydraulic pressure safety device for a hydraulic rotary cylinder, which utilizes a self-locking valve body group having a pressure control effect. It replaces the original oil channel and can assist in the control of internal oil pressure, which can reduce production costs and provide oil pressure retention.

本新型所運用的技術手段係在於提供一種油壓迴轉缸保壓安全裝置，包括： 一缸體，其係於一側開設有一油液槽，並於該油液槽的中央底部開設有一供活塞通過的活塞穿孔； 一活塞，其係於外周環繞形成一活塞環，該活塞係以該活塞環密合抵靠於該油液槽的內側壁，並以一端對應穿入該活塞穿孔； 一迴轉座，其係於外周環繞形成一活塞環，該活塞係以該活塞環密合抵靠於該油液槽的內側壁，並以一端對應穿入該活塞穿孔，該迴轉座於鄰近該組合穿孔係開設有兩相互對稱的組裝槽，及兩分別沿著縱向延伸並連通該兩組裝槽的進油通道； 兩自鎖閥體組，其係呈對稱地設置於該迴轉座及該缸體之間，且分別以一端對應組設於該迴轉座之兩組裝槽，並分別以一端貫穿該活塞並固設於該缸體； 一油路裝置，其係套設於該迴轉座之異於接觸該缸體的外周面，並設有複數個油路溝，其中之一油路溝係對應連通於該迴轉座之進油通道。The technical means used in the present invention is to provide a hydraulic pressure safety device for a hydraulic rotary cylinder, comprising: a cylinder body having an oil tank on one side and a piston for the bottom of the oil tank; Passing through the piston; a piston is formed around the outer circumference to form a piston ring, the piston is closely abutted against the inner side wall of the oil groove by the piston ring, and correspondingly penetrates the piston through the one end; a seat, which is formed around a circumference to form a piston ring, the piston is closely abutted against the inner side wall of the oil groove by the piston ring, and correspondingly penetrates the piston through hole at one end, the rotary seat is adjacent to the combined perforation The system is provided with two mutually symmetric assembly slots, and two oil inlet passages respectively extending along the longitudinal direction and communicating with the two assembly slots; two self-locking valve body groups are symmetrically disposed on the rotary seat and the cylinder block And respectively disposed at one end of the two assembly slots of the rotary seat, and respectively penetrate the piston at one end and fixed to the cylinder; an oil passage device is sleeved on the rotary seat. The outer circumference of the cylinder And a plurality of oil passage grooves, wherein one of the communication passage groove group corresponding to the intake passage of the swivel.

前述之油壓迴轉缸保壓安全裝置，其中該活塞在相對於設有該兩自鎖閥體組的位置進一步設置有兩洩壓閥。In the foregoing hydraulic pressure cylinder safety protection device, the piston is further provided with two pressure relief valves at positions opposite to the two self-locking valve body groups.

前述之油壓迴轉缸保壓安全裝置，其中該兩自鎖閥體組分別包括有一鋼珠保持桿、一壓縮彈簧、一鋼珠、一自鎖閥體及一引導活塞，該鋼珠保持桿係以一端穿設該活塞並固定於該缸體，該鋼珠保持桿係具有一彈簧槽，該壓縮彈簧係對應設置於該彈簧槽內，該鋼珠對應設置於該壓縮彈簧之頂端，該自鎖閥體係對應蓋合於該壓縮彈簧及該鋼珠的外側，並對應設置於該迴轉座之兩組裝槽內。The above-mentioned hydraulic pressure cylinder safety protection device, wherein the two self-locking valve body groups respectively comprise a steel ball retaining rod, a compression spring, a steel ball, a self-locking valve body and a guiding piston, wherein the steel ball retaining rod is at one end The steel ball retaining rod has a spring groove, and the compression spring is correspondingly disposed in the spring groove. The steel ball is correspondingly disposed on the top end of the compression spring, and the self-locking valve system corresponds to Covering the compression spring and the outer side of the steel ball, and correspondingly disposed in the two assembly grooves of the rotary seat.

本新型可以獲得的功效增進在於簡化了缸體及迴轉座內部的輸油通道的設計，並利用兩自鎖閥體來取代原先輸油通道，兩自鎖閥體本身具有控制油壓及協助活塞定位的功能，進而達到降低整體成本並提供油液保壓的效果。The improved efficiency of the present invention is to simplify the design of the oil passage inside the cylinder block and the rotary seat, and to replace the original oil passage by using two self-locking valve bodies, the two self-locking valve bodies themselves have control oil pressure and assist the piston. The positioning function, in turn, reduces the overall cost and provides the effect of oil pressure retention.

為能詳細瞭解本新型的技術特徵及實用功效，並可依照說明書的內容來實現，玆進一步以如圖式所示的第一較佳實施例，詳細說明如后：In order to understand the technical features and practical functions of the present invention in detail, and in accordance with the contents of the specification, the first preferred embodiment shown in the following figure is further described in detail as follows:

本新型係一種油壓迴轉缸保壓安全裝置，請參閱圖1的較佳實施例，其係包括一缸體10、一活塞20、一迴轉座30、兩自鎖閥體組40、一油路裝置50及一罩殼60。The present invention relates to a hydraulic pressure safety device for a hydraulic rotary cylinder. Referring to the preferred embodiment of FIG. 1, a cylinder 10, a piston 20, a rotary seat 30, two self-locking valve body groups 40, and an oil are provided. The road device 50 and a casing 60.

如圖1所示，該缸體10係於一側開設有一油液槽110，並於該油液槽110的中央底部開設有一供活塞通過的活塞穿孔111。As shown in FIG. 1 , the cylinder 10 has an oil groove 110 on one side, and a piston through hole 111 through which the piston passes is opened at the central bottom of the oil groove 110.

如圖1所示，該活塞20係於外周環繞形成一活塞環21，該活塞20係以該活塞環21密合抵靠於該油液槽110的內側壁，並以一端對應穿入該活塞穿孔111，使該活塞20能夠沿著該活塞穿孔111之軸心方向往復作動。As shown in FIG. 1 , the piston 20 is formed around a circumference to form a piston ring 21 . The piston 20 is closely abutted against the inner side wall of the oil groove 110 and correspondingly penetrates the piston at one end. The through hole 111 allows the piston 20 to reciprocate in the axial direction of the piston through hole 111.

如圖1所示，該迴轉座30係於中央貫設有一組合穿孔31，該迴轉座30係以該組合穿孔31對應套設於該活塞20異於穿出該活塞穿孔111的一端，該迴轉座30係以螺栓固定結合於該缸體10並對應蓋合於該油液槽110，該迴轉座30於鄰近該組合穿孔31係開設有兩相互對稱的組裝槽32，及兩分別沿著縱向延伸並連通該兩組裝槽32的進油通道33。As shown in FIG. 1 , the slewing seat 30 is integrally disposed with a combined through hole 31 , and the slewing seat 30 is correspondingly sleeved on the end of the piston 20 that is different from the piston through hole 111 . The seat 30 is bolted to the cylinder block 10 and correspondingly covers the oil tank 110. The swing seat 30 is adjacent to the combined through hole 31 and is provided with two mutually symmetric assembly grooves 32, and two respectively along the longitudinal direction. The oil inlet passage 33 of the two assembly tanks 32 extends and communicates.

如圖1所示，該兩自鎖閥體組40係呈對稱地設置於該迴轉座30及該缸體10之間，且分別以一端對應組設於該迴轉座30之兩組裝槽32，並分別以一端貫穿該活塞20並固設於該缸體10。As shown in FIG. 1 , the two self-locking valve body groups 40 are symmetrically disposed between the rotary seat 30 and the cylinder block 10 , and are respectively disposed at two ends of the assembly groove 32 of the rotary seat 30 . The piston 20 is inserted through the piston 20 at one end and fixed to the cylinder 10.

該兩自鎖閥體組40分別包括有一鋼珠保持桿41、一壓縮彈簧42、一鋼珠43、一自鎖閥體44及一引導活塞45，該鋼珠保持桿41係沿軸向貫設有一導油通道411及一連通該導油通道411的出油孔412，並於該導油通道411的一端出口處形成一凹陷狀並連通該導油通道411的彈簧槽413，該鋼珠保持桿41係以設有該出油孔412的一端穿設該活塞20並固定於該缸體10之油液槽110的底部，該壓縮彈簧42係對應設置於該彈簧槽413內，該鋼珠43對應設置於該壓縮彈簧42之頂端，該自鎖閥體44係對應蓋合於該壓縮彈簧42及該鋼珠43的外側，並對應設置於該迴轉座30之兩組裝槽32內，該自鎖閥體44係於軸心貫設有一入油孔441及一連通該入油孔441上方的活塞槽442，該活塞槽442係連通該迴轉座30之進油通道33，該引導活塞45係對應設置於該活塞槽442內，並可透過油液對應封閉或開啟該入油孔441與該活塞槽442的連通關係，其中，該兩自鎖閥體組40因應入油或出油位置不同，內部結構略有差異，在此不加以詳述。The two self-locking valve body groups 40 respectively include a steel ball retaining rod 41, a compression spring 42, a steel ball 43, a self-locking valve body 44 and a guiding piston 45. The steel ball retaining rod 41 is axially disposed with a guide. An oil passage 411 and an oil outlet hole 412 communicating with the oil guiding passage 411, and a spring groove 413 formed in a recessed shape and communicating with the oil guiding passage 411 at an outlet end of the oil guiding passage 411, the steel ball retaining rod 41 The piston 20 is inserted into the bottom of the oil tank 110 of the cylinder 10 and the compression spring 42 is correspondingly disposed in the spring groove 413. The steel ball 43 is correspondingly disposed on the bottom of the oil tank 110. The self-locking valve body 44 is correspondingly disposed on the outer side of the compression spring 42 and the steel ball 43 and correspondingly disposed in the two assembly slots 32 of the rotary seat 30. The self-locking valve body 44 is disposed at the top end of the compression spring 42. An oil inlet hole 441 and a piston groove 442 communicating with the oil inlet hole 441 are connected to the shaft center. The piston groove 442 is connected to the oil inlet passage 33 of the rotary seat 30. The guiding piston 45 is correspondingly disposed on the shaft. In the piston groove 442, the oil inlet hole 441 and the piston can be closed or opened correspondingly through the oil. Communication relationship 442, wherein the set of two self-locking valve 40 into the oil or in response to different positions of oil, slightly different internal structure, which will not be described in detail.

如圖1所示，該油路裝置50係套設於該迴轉座30之異於接觸該缸體10的外周面，並設有複數個油路溝51，其中之一油路溝51係對應連通於該迴轉座30之進油通道33，該罩殼60係對應套設於該油路裝置50及該迴轉座30的外側，由於該油路裝置50及該罩殼60均為現有技術，故在此不加以詳述。As shown in FIG. 1 , the oil passage device 50 is sleeved on the outer peripheral surface of the rotary base 30 that is different from the cylinder 10 , and is provided with a plurality of oil passage grooves 51 , one of which corresponds to the oil passage groove 51 . An oil inlet passage 33 is connected to the rotary seat 30. The casing 60 is sleeved on the outer side of the oil passage device 50 and the rotary seat 30. Since the oil passage device 50 and the casing 60 are both prior art, Therefore, it will not be described in detail here.

本新型進一步可於該活塞20相對於設有該兩自鎖閥體組40的位置設置有兩洩壓閥70，該兩洩壓閥70係可用於控制該油液槽110內部壓力，當該油液槽110的內部壓力過大時，可使油液由出油側排出。The present invention further provides two pressure relief valves 70 at the position of the piston 20 relative to the two sets of the self-locking valve body 40. The two pressure relief valves 70 can be used to control the internal pressure of the oil tank 110. When the internal pressure of the oil tank 110 is excessively large, the oil can be discharged from the oil discharge side.

本新型第一較佳實施例的使用方式如圖2所示，當該油路裝置50灌入油液時，油液會經由其中一油路溝51進入該進油通道33，經過其中一組的自鎖閥體組40之活塞槽442內並推動該引導活塞45，該鋼珠43及該壓縮彈簧42被該引導活塞45所推動，使該自鎖閥體組40內部形成通路，而油液能夠透過該出油孔412進入該缸體10之油液槽110，進而推動該活塞20產生往復動作，而出油側的動作則相反於入油側。The first preferred embodiment of the present invention is used in the manner shown in FIG. 2. When the oil passage device 50 is filled with oil, the oil enters the oil inlet passage 33 through one of the oil passage grooves 51, and passes through one of the groups. The piston groove 442 of the self-locking valve body group 40 pushes the guiding piston 45, and the steel ball 43 and the compression spring 42 are pushed by the guiding piston 45 to form a passage inside the self-locking valve body group 40, and the oil The oil drain groove 412 can enter the oil tank 110 of the cylinder block 10, thereby pushing the piston 20 to reciprocate, and the oil discharge side is opposite to the oil inlet side.

本新型簡化了該迴轉座30及該缸體10的油路設計，並透過該兩自鎖閥體組40來並搭配該兩洩壓閥70進行進、出油的管理，該兩自鎖閥體40取代了原先的油路，且該兩自鎖閥體40本身具有控制油壓及協助該活塞20定位的功能，進而達到降低整體成本並提供油液保壓的效果。The utility model simplifies the oil circuit design of the rotary seat 30 and the cylinder block 10, and manages the oil inlet and outlet through the two self-locking valve body groups 40 and the two pressure relief valves 70, the two self-locking valves The body 40 replaces the original oil passage, and the two self-locking valve bodies 40 themselves have the function of controlling the oil pressure and assisting the positioning of the piston 20, thereby achieving the effect of reducing the overall cost and providing oil pressure retention.

如圖3所示，其係為本新型之第二較佳實施例，其係與第一較佳實施例大致相同，差異在於該兩自鎖閥體組40A及該兩洩壓閥70A的流向與前述實施例的相反，其他的使用方式均無差異。As shown in FIG. 3, it is a second preferred embodiment of the present invention, which is substantially the same as the first preferred embodiment. The difference lies in the flow direction of the two self-locking valve body groups 40A and the two pressure relief valves 70A. Contrary to the previous embodiment, there is no difference in other modes of use.

以上所述，僅是本新型的較佳實施例，並非對本新型作任何形式上的限制，任何所屬技術領域中具有通常知識者，若在不脫離本新型所提技術特徵的範圍內，利用本新型所揭示技術內容所作出局部替換、更改、轉用、變動或修飾的等效實施例，均仍屬於本新型技術特徵的範圍內。The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any person having ordinary knowledge in the art can use the present invention without departing from the technical features of the present invention. Equivalent embodiments that are susceptible to substitution, alteration, alteration, alteration, or modification of the present invention are still within the scope of the present invention.

10‧‧‧缸體
110‧‧‧油液槽
111‧‧‧活塞穿孔
20‧‧‧活塞
21‧‧‧活塞環
30‧‧‧迴轉座
31‧‧‧組合穿孔
32‧‧‧組裝槽
33‧‧‧進油通道
40、40A‧‧‧自鎖閥體組
41‧‧‧鋼珠保持桿
411‧‧‧導油通道
412‧‧‧出油孔
413‧‧‧彈簧槽
42‧‧‧壓縮彈簧
43‧‧‧鋼珠
44‧‧‧自鎖閥體
441‧‧‧入油孔
442‧‧‧活塞槽
45‧‧‧引導活塞
50‧‧‧油路裝置
51‧‧‧油路溝
60‧‧‧罩殼
70、70A‧‧‧洩壓閥
80‧‧‧油壓迴轉缸
81‧‧‧缸體
810‧‧‧油液槽
811‧‧‧活塞穿孔
812‧‧‧入油道
82‧‧‧活塞
821‧‧‧活塞環
83‧‧‧迴轉座
831‧‧‧控油裝置
832‧‧‧輸油通道
84‧‧‧導位銷
85‧‧‧油路裝置
86‧‧‧罩殼10‧‧‧Cylinder
110‧‧‧ oil tank
111‧‧‧Piston piercing
20‧‧‧Piston
21‧‧‧Piston ring
30‧‧‧Revolving seat
31‧‧‧ Combination perforation
32‧‧‧Assemble slot
33‧‧‧ oil passage
40, 40A‧‧‧Self-locking valve body set
41‧‧‧Steel ball retaining rod
411‧‧‧ oil passage
412‧‧‧ oil hole
413‧‧‧Spring slot
42‧‧‧Compression spring
43‧‧‧ steel balls
44‧‧‧Self-locking valve body
441‧‧‧ oil hole
442‧‧‧ piston groove
45‧‧‧Guided Piston
50‧‧‧ Oil circuit device
51‧‧‧ Oil Road Ditch
60‧‧‧Shell
70, 70A‧‧ ‧ relief valve
80‧‧‧Hydraulic rotary cylinder
81‧‧‧ cylinder
810‧‧‧ oil tank
811‧‧‧Piston piercing
812‧‧‧Into the oil passage
82‧‧‧Piston
821‧‧‧Piston ring
83‧‧‧Revolving seat
831‧‧‧ oil control device
832‧‧‧ oil channel
84‧‧‧guide pin
85‧‧‧ Oil circuit device
86‧‧‧Shell

圖1為本新型第一較佳實施例的剖面示意圖。 圖2為本新型第一較佳實施例的剖面動作示意圖。 圖3為本新型第一較佳實施例的剖面動作示意圖。 圖4為現有的油壓迴轉缸的剖面示意圖。 圖5為現有的油壓迴轉缸的剖面動作示意圖。1 is a schematic cross-sectional view of a first preferred embodiment of the present invention. Figure 2 is a schematic cross-sectional view of the first preferred embodiment of the present invention. Figure 3 is a schematic cross-sectional view of the first preferred embodiment of the present invention. 4 is a schematic cross-sectional view of a conventional hydraulic rotary cylinder. Fig. 5 is a schematic cross-sectional view showing a conventional hydraulic rotary cylinder.

10‧‧‧缸體 10‧‧‧Cylinder

110‧‧‧油液槽 110‧‧‧ oil tank

111‧‧‧活塞穿孔 111‧‧‧Piston piercing

20‧‧‧活塞 20‧‧‧Piston

21‧‧‧活塞環 21‧‧‧Piston ring

30‧‧‧迴轉座 30‧‧‧Revolving seat

31‧‧‧組合穿孔 31‧‧‧ Combination perforation

32‧‧‧組裝槽 32‧‧‧Assemble slot

33‧‧‧進油通道 33‧‧‧ oil passage

40‧‧‧自鎖閥體組 40‧‧‧Self-locking valve body group

41‧‧‧鋼珠保持桿 41‧‧‧Steel ball retaining rod

411‧‧‧導油通道 411‧‧‧ oil passage

412‧‧‧出油孔 412‧‧‧ oil hole

413‧‧‧彈簧槽 413‧‧‧Spring slot

42‧‧‧壓縮彈簧 42‧‧‧Compression spring

43‧‧‧鋼珠 43‧‧‧ steel balls

44‧‧‧自鎖閥體 44‧‧‧Self-locking valve body

441‧‧‧入油孔 441‧‧‧ oil hole

442‧‧‧活塞槽 442‧‧‧ piston groove

45‧‧‧引導活塞 45‧‧‧Guided Piston

50‧‧‧油路裝置 50‧‧‧ Oil circuit device

51‧‧‧油路溝 51‧‧‧ Oil Road Ditch

60‧‧‧罩殼 60‧‧‧Shell

Claims (3)

一種油壓迴轉缸保壓安全裝置，包括： 一缸體，其係於一側開設有一油液槽，並於該油液槽的中央底部開設有一供活塞通過的活塞穿孔； 一活塞，其係於外周環繞形成一活塞環，該活塞係以該活塞環密合抵靠於該油液槽的內側壁，並以一端對應穿入該活塞穿孔； 一迴轉座，其係於外周環繞形成一活塞環，該活塞係以該活塞環密合抵靠於該油液槽的內側壁，並以一端對應穿入該活塞穿孔，該迴轉座於鄰近該組合穿孔係開設有兩相互對稱的組裝槽，及兩分別沿著縱向延伸並連通該兩組裝槽的進油通道； 兩自鎖閥體組，其係呈對稱地設置於該迴轉座及該缸體之間，且分別以一端對應組設於該迴轉座之兩組裝槽，並分別以一端貫穿該活塞並固設於該缸體； 一油路裝置，其係套設於該迴轉座之異於接觸該缸體的外周面，並設有複數個油路溝，其中之一油路溝係對應連通於該迴轉座之進油通道。A hydraulic pressure safety device for a hydraulic rotary cylinder, comprising: a cylinder body having an oil tank on one side, and a piston perforation through which a piston passes through a central bottom of the oil tank; a piston Forming a piston ring around the outer circumference, the piston is closely abutted against the inner side wall of the oil groove by the piston ring, and correspondingly penetrates the piston through the one end; a rotating seat is formed around the outer circumference to form a piston a ring, the piston is closely abutted against the inner side wall of the oil groove, and correspondingly penetrates the piston through hole at one end, and the rotary seat is provided with two mutually symmetric assembly grooves adjacent to the combined perforation. And two oil inlet passages extending along the longitudinal direction and communicating with the two assembly tanks; two self-locking valve body groups are symmetrically disposed between the rotary seat and the cylinder block, and are respectively disposed at one end The two assembly slots of the rotary base are respectively inserted into the cylinder at one end and fixed to the cylinder; an oil passage device is sleeved on the outer circumference of the rotary seat and is adjacent to the cylinder, and is provided a plurality of oil drains, one of which is oil Group corresponding to the groove into communication with an oil passage of the swivel. 如請求項1所述之油壓迴轉缸保壓安全裝置，其中該活塞在相對於設有該兩自鎖閥體組的位置進一步設置有兩洩壓閥。The hydraulic rotary cylinder pressure-preserving safety device according to claim 1, wherein the piston is further provided with two pressure relief valves at positions opposite to the two self-locking valve body groups. 如請求項1或2所述之油壓迴轉缸保壓安全裝置，其中該兩自鎖閥體組分別包括有一鋼珠保持桿、一壓縮彈簧、一鋼珠、一自鎖閥體及一引導活塞，該鋼珠保持桿係以一端穿設該活塞並固定於該缸體，該鋼珠保持桿係具有一彈簧槽，該壓縮彈簧係對應設置於該彈簧槽內，該鋼珠對應設置於該壓縮彈簧之頂端，該自鎖閥體係對應蓋合於該壓縮彈簧及該鋼珠的外側，並對應設置於該迴轉座之兩組裝槽內。The hydraulic pressure cylinder safety protection device according to claim 1 or 2, wherein the two self-locking valve body groups respectively comprise a steel ball retaining rod, a compression spring, a steel ball, a self-locking valve body and a guiding piston. The steel ball retaining rod is disposed at one end of the piston and is fixed to the cylinder. The steel ball retaining rod has a spring groove. The compression spring is correspondingly disposed in the spring groove, and the steel ball is correspondingly disposed on the top end of the compression spring. The self-locking valve system is correspondingly disposed on the outer side of the compression spring and the steel ball, and is correspondingly disposed in the two assembly grooves of the rotary seat.