Rotary hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a rotary hydraulic oil cylinder which comprises an oil cylinder base, an oil cylinder shell and an oil cylinder front end plate, the oil cylinder shell is fixedly installed on one side of the oil cylinder base, and a hydraulic motion heat utilization structure is arranged on the inner side of the oil cylinder shell. The hydraulic motion heat utilization structure comprises connecting pieces, an isolation layer and a fixing ring, the multiple connecting pieces are fixedly installed on the inner side of the oil cylinder shell, and heat conduction rods are fixedly connected to the ends of the multiple connecting pieces. According to the rotary hydraulic oil cylinder, when the hydraulic oil cylinder is started, the heat conduction rods can transfer heat into the circulating pipes on the inner sides of the fixing rings on the two sides, internal heat generated when the hydraulic oil cylinder is started can be transferred to the oil inlet holes to heat hydraulic oil entering the oil inlet holes, and heat generated when the interior of the rotary hydraulic oil cylinder works is led out to heat the hydraulic oil; the heat dissipation function can be achieved, heat can be fully utilized, and the working cost of the rotary hydraulic oil cylinder is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a rotary hydraulic cylinder. Background Art

[0002] Hydraulic rotary cylinder is a compact fitting that uses hydraulics to pack very high torque into a small space. Despite the high power, they can still be precisely and easily controlled. Rotary cylinders have been successfully used in almost all areas that require limited rotational motion and high torque.

[0003] For example, the authorization announcement number "CN218862977U" is named as a rotary hydraulic cylinder. Although the installed protective mechanism prevents the threaded hydraulic pipeline from direct contact with the outside world, thereby forming a vacuum protective layer, the vacuum protective layer cuts off the connection between the threaded hydraulic pipeline and the outside world, thereby avoiding the influence of external environmental factors on the threaded hydraulic pipeline, but the existing rotary hydraulic cylinder adopts a method that can reduce the influence of the external low temperature environment on the hydraulic oil of the rotary hydraulic cylinder, which makes the interior of the rotary hydraulic cylinder basically in a closed and sealed environment. At the same time, when the rotary hydraulic cylinder is working, the threaded rod under the internal sealing condition will rub against the inner wall of the hydraulic cylinder to generate heat, so an additional structure for cooling and dissipating heat is set up. Therefore, in actual use, the rotary hydraulic cylinder must not only have a structure that isolates the external low temperature and maintains the state of the hydraulic oil, but also has a structure that can dissipate heat and cool the internal hydraulic equipment. Therefore, it directly leads to the heat generated during the movement of the internal hydraulic structure not being well utilized, thereby increasing the working cost of the existing rotary hydraulic cylinder.

[0004] At the same time, the existing rotary hydraulic cylinder needs to be installed in an environment with small space requirements and great installation difficulty. At present, a liquid storage tank used for heat dissipation structure is protruded from the outer wall of the rotary hydraulic cylinder. Therefore, the outer wall of the rotary hydraulic cylinder will use more temporary space. At the same time, the liquid storage tank cannot enter some narrow and small-spaced locations, which directly affects the installation and use of the rotary hydraulic cylinder and is restricted. Utility Model Content

[0005] The utility model aims to solve the problems of increased working cost and limited installation and use of a rotary hydraulic cylinder, and proposes a rotary hydraulic cylinder.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotary hydraulic cylinder, comprising a cylinder base, a cylinder shell and a cylinder front end plate, the cylinder shell being fixedly mounted on one side of the cylinder base, the inner side of the cylinder shell being provided with a hydraulic motion heat utilization structure, the hydraulic motion heat utilization structure comprising a connecting piece, an insulating layer and a fixing ring, a plurality of the connecting pieces being fixedly mounted on the inner side of the cylinder shell, the ends of the plurality of the connecting pieces being fixedly connected with a heat-conducting rod, a plurality of circulation pipes being fixedly connected at both ends of the heat-conducting rod, the fixing ring being fixedly sleeved on the outer side of the circulation pipe, the insulating layer being fixedly sleeved on the inside of the cylinder shell, and the inner wall of the insulating layer being arranged relatively parallel to the heat-conducting rod.

[0007] Preferably, a hydraulic oil delivery structure is provided on the inner side of the oil cylinder housing;

[0008] The hydraulic oil delivery structure includes an oil inlet hole, a sealing ring and an oil drain pipe;

[0009] The two oil inlet holes are fixedly opened at the top of the cylinder housing, the two sealing rings are fixedly sleeved on the outside of the oil inlet holes, the lower ends of the two sealing rings are fixedly connected to the cylinder housing, the two oil drain pipes are fixedly connected to the bottom end of the cylinder housing, and the lower ends of the two oil drain pipes are fixedly connected to the oil outlet valve port.

[0010] Preferably, the inner sides of the two fixing rings are sleeved with the outer side of the oil inlet hole, and the outer walls of the plurality of circulation pipes are fixedly connected with the outer walls of the oil inlet hole.

[0011] Preferably, a rotary hydraulic cylinder driving structure is provided on the inner side of the cylinder housing;

[0012] The rotary hydraulic cylinder driving structure comprises a hydraulic oil chamber, a positioning sleeve and a threaded rod;

[0013] The hydraulic oil chamber is fixedly opened inside the oil cylinder housing, the positioning sleeve is fixedly sleeved inside the oil cylinder housing, the inner side of the positioning sleeve is fixedly opened with a spiral pattern, the inner side of the spiral pattern is threadedly connected with a threaded column, the threaded rod is fixedly installed on the end of the threaded column, the threaded rod is connected to the front end thread of the oil cylinder housing, and two limit blocks are fixedly installed on the other end of the positioning sleeve, and one side of the two limit blocks is movably connected to the threaded column.

[0014] Preferably, the lower ends of the plurality of connecting pieces are fixedly connected to the outer wall of the positioning sleeve, and the heat conducting rod and the positioning sleeve are arranged relatively parallel.

[0015] Preferably, a transverse installation-facilitating structure is provided on the outer side of the oil cylinder housing;

[0016] The transverse installation-facilitating structure comprises a limiting ring, a tightening sleeve and a clamping block;

[0017] The two limiting rings are fixedly sleeved on the outer side of the cylinder housing, the two tightening sleeves are movably connected to the inner side of the limiting rings, the rear sides of the two tightening sleeves are rotatably connected with pin shafts, the front ends of the two tightening sleeves are fixedly connected with two protrusions, the inner sides of the two protrusions are fixedly provided with locking holes, the two clamping blocks are fixedly connected to the two ends of the tightening sleeves, and the inner sides of the two clamping blocks are threadedly connected with bolts.

[0018] Preferably, the front end plate of the oil cylinder is fixedly connected to the front end of the oil cylinder shell, a leak-proof pad is fixedly installed at the front end of the front end plate of the oil cylinder, an output rod is slidably connected to the inner side of the leak-proof pad, and the rear side of the output rod is fixedly connected to the end of the threaded rod.

[0019] The utility model provides a rotary hydraulic cylinder, which has the beneficial effect that when the hydraulic cylinder is started, the heat-conducting rod transfers heat to the inner circulation pipes of the fixed rings on both sides, and the internal heat generated when the hydraulic cylinder is started is transferred to the oil inlet hole to heat the hydraulic oil entering. The heat generated when the rotary hydraulic cylinder is working is led out to heat the hydraulic oil, which not only has the heat dissipation function, but also can make full use of the heat, thereby reducing the working cost of the rotary hydraulic cylinder.

[0020] The clamping sleeve is connected to the outside of the limiting ring, the limiting ring will clamp the position of the clamping sleeve, and then the locking holes are tightened with external screws and nuts to fix it. Multiple bolts are screwed into the solid wall and floor of the surrounding environment, and the clamping block will complete the fixed installation with the clamping sleeve. The external surrounding structure is used to facilitate the tightening installation, so that the rotary hydraulic cylinder can be installed and fixed firmly in a relatively narrow or small fixed space, so that the installation of the rotary hydraulic cylinder is not easily restricted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0022] Figure 2 for Figure 1 A front cross-sectional schematic diagram of

[0023] Figure 3 for Figure 1 A schematic diagram of a right side view of FIG.

[0024] Figure 4 for Figure 2 Enlarged cross-sectional view of part A in the middle;

[0025] Figure 5 for Figure 2 Enlarged cross-sectional view of part B in the middle;

[0026] Figure 6 for Figure 1 Enlarged schematic diagram of part C in the middle.

[0027] In the figure: 1. Cylinder base, 2. Cylinder shell, 3. Cylinder front end plate, 4. Leakage-proof pad, 5. Output rod, 6. Rotary hydraulic cylinder drive structure, 61. Hydraulic cylinder, 62. Positioning sleeve, 63. Limit block, 64. Spiral pattern, 65. Threaded column, 66. Threaded rod, 7. Hydraulic motion heat utilization structure, 71. Connecting piece, 72. Heat conducting rod, 73. Insulating layer, 74. Fixing ring, 75. Circulating pipe, 8. Hydraulic oil delivery structure, 81. Oil inlet hole, 82. Sealing ring, 83. Oil drain pipe, 84. Oil outlet valve port, 9. Horizontal structure for easy installation, 91. Limiting ring, 92. Tightening sleeve, 93. Bump, 94. Locking hole, 95. Block, 96. Bolt. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] See also Figure 1-6A rotary hydraulic cylinder comprises a cylinder base 1, a cylinder shell 2 and a cylinder front end plate 3. The cylinder shell 2 is fixedly mounted on one side of the cylinder base 1. A hydraulic motion heat utilization structure 7 is provided on the inner side of the cylinder shell 2. The hydraulic motion heat utilization structure 7 comprises a connecting piece 71, an insulating layer 73 and a fixing ring 74. A plurality of connecting pieces 71 are fixedly mounted on the inner side of the cylinder shell 2. The ends of the plurality of connecting pieces 71 are fixedly connected with heat-conducting rods 72. The heat-conducting rods 72 are made of copper tubes with excellent thermal conductivity. The heat-conducting rods 72 are connected to the inner side of the cylinder shell 2 through a plurality of connecting pieces 71 for driving The threaded column 65 is connected to the positioning sleeve 62 that moves, so that when the hydraulic cylinder is started, the connecting piece 71 will transfer the heat generated inside the cylinder to the heat-conducting rod 72. The two ends of the heat-conducting rod 72 are fixedly connected to multiple circulation pipes 75. The fixing ring 74 is fixedly sleeved on the outside of the circulation pipe 75. The insulating layer 73 is fixedly sleeved on the inside of the cylinder shell 2. The insulating layer 73 is made of a relatively strong metal steel with good heat insulation performance. While providing protection for the cylinder shell 2, it reduces the impact of the low temperature of the external environment on the inside of the cylinder shell 2. The inner wall of the insulating layer 73 is relatively parallel to the heat-conducting rod 72, and then The rear heat-conducting rod 72 will transfer heat to the inner circulation pipe 75 of the fixing ring 74 on both sides. The circulation pipe 75 is also made of a metal copper tube with good heat transfer effect. In this way, when the external hydraulic oil is poured into the cylinder housing 2, the internal heat generated by the hydraulic cylinder starting will be transferred to the oil inlet hole 81 to heat the incoming hydraulic oil. In this way, the heated hydraulic oil has a better flow effect and is not easy to solidify. A hydraulic oil delivery structure 8 is provided on the inner side of the cylinder housing 2. The hydraulic oil delivery structure 8 includes an oil inlet hole 81, a sealing ring 82 and an oil drain pipe 83. The two oil inlet holes 81 are fixedly opened on the cylinder housing 2. At the top, two sealing rings 82 are fixedly sleeved on the outside of the oil inlet hole 81. The sealing ring 82 is made of rubber material to reduce the oil leakage on both sides of the oil inlet hole 81. The lower ends of the two sealing rings 82 are fixedly connected to the oil cylinder housing 2. Two oil drain pipes 83 are fixedly connected to the bottom end of the oil cylinder housing 2. The lower ends of the two oil drain pipes 83 are fixedly connected with an oil outlet valve port 84. The oil outlet valve port 84 can be opened to discharge the hydraulic oil inside the oil cylinder housing 2. The inner sides of the two fixing rings 74 are sleeved on the outer side of the oil inlet hole 81. The outer walls of the multiple circulation pipes 75 are fixedly connected to the outer wall of the oil inlet hole 81.

[0030] The heat-conducting rod 72 is made of a copper tube with excellent heat conductivity. The heat-conducting rod 72 is connected to the positioning sleeve 62 inside the cylinder housing 2 for driving the threaded column 65 to move through multiple connecting pieces 71. In this way, when the hydraulic cylinder is started, the connecting piece 71 will transfer the heat generated inside the cylinder to the heat-conducting rod 72, and then the heat-conducting rod 72 will transfer the heat to the inner circulation pipe 75 of the fixing ring 74 on both sides. The circulation pipe 75 is also made of a metal copper tube with good heat transfer effect. In this way, when the external hydraulic oil is poured into the cylinder housing 2, the internal heat generated by the start of the hydraulic cylinder will be transferred to the oil inlet hole 81 to heat the incoming hydraulic oil. In this way, the heated hydraulic oil has a better flow effect and is not easy to solidify. The insulating layer 73 is made of a relatively strong metal steel with good heat insulation performance. While providing protection for the cylinder shell 2, it reduces the impact of the low temperature of the external environment on the inside of the cylinder shell 2. The sealing ring 82 is made of rubber material to reduce oil leakage on both sides of the oil inlet hole 81. The hydraulic oil inside the cylinder shell 2 can be discharged by opening the oil outlet valve port 84. The heat generated when the rotating hydraulic cylinder works is used to heat the hydraulic oil. It can not only play a heat dissipation function, but also make full use of the heat, thereby reducing the working cost of the rotating hydraulic cylinder.

[0031] See also Figure 1-6 A rotary hydraulic cylinder driving structure 6 is provided on the inner side of the cylinder housing 2. The rotary hydraulic cylinder driving structure 6 includes a hydraulic oil chamber 61, a positioning sleeve 62 and a threaded rod 66. The hydraulic oil chamber 61 is fixedly opened inside the cylinder housing 2. The positioning sleeve 62 is fixedly sleeved inside the cylinder housing 2. A spiral pattern 64 is fixedly opened on the inner side of the positioning sleeve 62. A threaded column 65 is threadedly rotatably connected to the inner side of the spiral pattern 64. The inner side of the spiral pattern 64 is threadedly connected to a threaded column 65. A threaded rod 66 is fixedly installed at the end of the threaded column 65. The threaded rod 66 is threadedly connected to the front end of the cylinder housing 2. Two limit blocks 63 are fixedly installed on the other end of the positioning sleeve 62. The limit blocks 63 can block the moving trajectory of the threaded column 65 at the bottom. When the hydraulic oil chamber 61 inside the hydraulic cylinder housing 2 is injected with hydraulic oil, the hydraulic oil will push the threaded column 65 forward and rotate it out along the spiral pattern 64, and then the threaded rod 66 at the front end will push the output rod 5 to extend at the front end of the cylinder housing 2. One side of the two limit blocks 63 is movably connected to the threaded column 65, and the lower ends of multiple connecting plates 71 are fixedly connected to the outer wall of the positioning sleeve 62. The heat conducting rod 72 and the positioning sleeve 62 are arranged relatively parallel.

[0032] See also Figure 1-6The outer side of the oil cylinder housing 2 is provided with a transverse installation structure 9, which includes a limit ring 91, a tightening sleeve 92 and a clamping block 95. The two limit rings 91 are fixedly sleeved on the outer side of the oil cylinder housing 2, and the two tightening sleeves 92 are movably connected to the inner side of the limit ring 91. The rear sides of the two tightening sleeves 92 are rotatably connected with a pin shaft 97. The front ends of the two tightening sleeves 92 are fixedly connected with two protrusions 93. The inner sides of the two protrusions 93 are fixedly provided with locking holes 94. The two tightening sleeves 92 will be folded open along the rear side pin shaft 97. When installed to a position with a small space, the tightening sleeve 92 is sleeved on the outer side of the limit ring 91, and the limit ring 91 will clamp the position of the tightening sleeve 92. Then the locking hole 94 is relatively tightened using external screws and nuts, etc. The structure can be fixed by tightening, two clamping blocks 95 are fixedly connected to the two ends of the clamping sleeve 92, and the inner sides of the two clamping blocks 95 are threadedly connected with bolts 96, and then the clamping sleeve 92 is placed at the location where it needs to be used with the inner cylinder housing 2, and multiple bolts 96 are screwed to the solid wall and ground of the surrounding environment, and the clamping block 95 will complete the fixed installation with the clamping sleeve 92, and the front end plate 3 of the cylinder is fixedly connected to the front end of the cylinder housing 2, and the front end of the front end plate 3 of the cylinder is fixedly installed with a leak-proof pad 4, which is made of rubber material, and the leak-proof pad 4 surrounding the outside of the output rod 5 can reduce the leakage of hydraulic oil inside the hydraulic cylinder, and the inner side of the leak-proof pad 4 is slidably connected with the output rod 5, and the rear side of the output rod 5 is fixedly connected to the end of the threaded rod 66;

[0033] The two clamping sleeves 92 will be folded open along the rear pin shaft 97. When installed in a position with a small space, the clamping sleeve 92 will be sleeved on the outside of the limiting ring 91, and the limiting ring 91 will clamp the position of the clamping sleeve 92. Then the locking hole 94 can be tightened relatively by using external screws and nuts to fix it. Then the clamping sleeve 92 with the inner cylinder housing 2 is placed at the location where it is needed, and multiple bolts 96 are screwed into the solid wall and floor of the surrounding environment. The clamping block 95 will complete the fixed installation with the clamping sleeve 92, and the external surrounding structure that is easy to tighten and install can be used to enable the rotary hydraulic cylinder to be installed and fixed firmly in a relatively narrow or small fixed space, so that the installation of the rotary hydraulic cylinder is not easily restricted.

[0034] Working principle:

[0035] When the rotary hydraulic cylinder is used in a location with low temperature and small installation space;

[0036] Rotating hydraulic cylinder heat dissipation utilization structure:

[0037] The heat-conducting rod 72 is made of a copper tube with excellent thermal conductivity. The heat-conducting rod 72 is connected to the positioning sleeve 62 inside the cylinder housing 2 for driving the threaded column 65 to move through a plurality of connecting pieces 71. In this way, when the hydraulic cylinder is started, the connecting piece 71 will transfer the heat generated inside the cylinder to the heat-conducting rod 72, and then the heat-conducting rod 72 will transfer the heat to the inner circulation pipe 75 of the fixing ring 74 on both sides. The circulation pipe 75 is also made of a metal copper tube with good thermal conductivity. In this way, when the external hydraulic oil is poured into the cylinder housing 2, the internal heat generated by the start of the hydraulic cylinder will be transferred to the oil inlet hole 81 to heat the hydraulic oil entering. In this way, the heated hydraulic oil has a better flow effect and is not easy to solidify. The insulating layer 73 is made of a relatively strong metal steel with good thermal insulation performance. While providing protection for the cylinder housing 2, it reduces the impact of the low temperature of the external environment on the inside of the cylinder housing 2. The sealing ring 82 is made of rubber material to reduce the occurrence of oil leakage on both sides of the oil inlet hole 81. The hydraulic oil inside the cylinder housing 2 can be discharged by opening the oil outlet valve 84.

[0038] Rotary hydraulic cylinder starting process:

[0039] The limit block 63 can block the moving track of the threaded column 65 at the bottom. When the hydraulic oil chamber 61 inside the hydraulic cylinder housing 2 is filled with hydraulic oil, the hydraulic oil will push the threaded column 65 forward along the spiral pattern 64 to rotate and eject, and then the front threaded rod 66 will push the output rod 5 to extend at the front end of the cylinder housing 2;

[0040] Rotating hydraulic cylinder for easy installation structure:

[0041] The two clamping sleeves 92 will be folded open along the rear pin shaft 97. When installed in a position with a small space, the clamping sleeve 92 will be sleeved on the outside of the limiting ring 91, and the limiting ring 91 will clamp the position of the clamping sleeve 92. Then the locking hole 94 can be tightened relatively by using external screws and nuts to fix it. Then the clamping sleeve 92 with the inner cylinder housing 2 is placed at the location where it is needed, and multiple bolts 96 are screwed into the solid wall and floor of the surrounding environment. The clamping block 95 will complete the fixed installation with the clamping sleeve 92, and the external surrounding structure that is easy to tighten and install can be used to enable the rotary hydraulic cylinder to be installed and fixed firmly in a relatively narrow or small fixed space, so that the installation of the rotary hydraulic cylinder is not easily restricted.

[0042] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A rotary hydraulic cylinder, comprising a cylinder base (1), a cylinder housing (2) and a cylinder front end plate (3), characterized in that: The oil cylinder shell (2) is fixedly mounted on one side of the oil cylinder base (1); a hydraulic motion heat utilization structure (7) is provided on the inner side of the oil cylinder shell (2); the hydraulic motion heat utilization structure (7) comprises a connecting piece (71), an insulating layer (73) and a fixing ring (74); a plurality of the connecting pieces (71) are fixedly mounted on the inner side of the oil cylinder shell (2); the ends of the plurality of the connecting pieces (71) are fixedly connected to a heat conducting rod (72); the two ends of the heat conducting rod (72) are fixedly connected to a plurality of circulation pipes (75); the fixing ring (74) is fixedly sleeved on the outer side of the circulation pipe (75); the insulating layer (73) is fixedly sleeved on the inner side of the oil cylinder shell (2); and the inner wall of the insulating layer (73) is arranged relatively parallel to the heat conducting rod (72).

2. A rotary hydraulic cylinder according to claim 1, characterized in that: A hydraulic oil delivery structure (8) is provided on the inner side of the oil cylinder housing (2); The hydraulic oil delivery structure (8) comprises an oil inlet hole (81), a sealing ring (82) and an oil discharge pipe (83); The two oil inlet holes (81) are fixedly opened at the top end of the oil cylinder housing (2); the two sealing rings (82) are fixedly sleeved on the outside of the oil inlet holes (81); the lower ends of the two sealing rings (82) are fixedly connected to the oil cylinder housing (2); the two oil discharge pipes (83) are fixedly connected to the bottom end of the oil cylinder housing (2); and the lower ends of the two oil discharge pipes (83) are fixedly connected to the oil outlet valve port (84).

3. A rotary hydraulic cylinder according to claim 1, characterized in that: The inner sides of the two fixing rings (74) are sleeved with the outer side of the oil inlet hole (81), and the outer walls of the plurality of circulation pipes (75) are fixedly connected with the outer wall of the oil inlet hole (81).

4. A rotary hydraulic cylinder according to claim 1, characterized in that: A rotating hydraulic cylinder driving structure (6) is provided on the inner side of the cylinder housing (2); The rotary hydraulic cylinder driving structure (6) comprises a hydraulic oil chamber (61), a positioning sleeve (62) and a threaded rod (66); The hydraulic oil chamber (61) is fixedly opened inside the oil cylinder housing (2); the positioning sleeve (62) is fixedly sleeved inside the oil cylinder housing (2); a spiral pattern (64) is fixedly opened on the inner side of the positioning sleeve (62); a threaded column (65) is threadedly connected to the inner side of the spiral pattern (64); the threaded rod (66) is fixedly installed on the end of the threaded column (65); the threaded rod (66) is threadedly connected to the front end of the oil cylinder housing (2); two limit blocks (63) are fixedly installed on the other end of the positioning sleeve (62); one side of the two limit blocks (63) is movably connected to the threaded column (65).

5. The rotary hydraulic cylinder according to claim 1, characterized in that: The lower ends of the plurality of connecting pieces (71) are fixedly connected to the outer wall of the positioning sleeve (62), and the heat conducting rod (72) and the positioning sleeve (62) are arranged relatively parallel to each other.

6. The rotary hydraulic cylinder according to claim 1, characterized in that: The outer side of the oil cylinder housing (2) is provided with a transverse installation-facilitating structure (9); The transverse installation-facilitating structure (9) comprises a limiting ring (91), a tightening sleeve (92) and a clamping block (95); The two limiting rings (91) are fixedly sleeved on the outer side of the oil cylinder housing (2), the two clamping sleeves (92) are movably connected to the inner side of the limiting rings (91), the rear sides of the two clamping sleeves (92) are rotatably connected with a pin shaft (97), the front ends of the two clamping sleeves (92) are fixedly connected with two protrusions (93), the inner sides of the two protrusions (93) are fixedly provided with locking holes (94), the two clamping blocks (95) are fixedly connected to the two ends of the clamping sleeves (92), and the inner sides of the two clamping blocks (95) are threadedly connected with bolts (96).

7. The rotary hydraulic cylinder according to claim 1, characterized in that: The front end plate (3) of the oil cylinder is fixedly connected to the front end of the oil cylinder housing (2); a leak-proof pad (4) is fixedly installed at the front end of the front end plate (3) of the oil cylinder; an output rod (5) is slidably connected to the inner side of the leak-proof pad (4); and the rear side of the output rod (5) is fixedly connected to the end of the threaded rod (66).

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