Swing oil cylinder for bending-resistant drill jumbo

Abstract

The utility model provides an anti-bending swing oil cylinder for a drill jumbo, which is provided with a right shell, a left shell and a middle support sleeve, the right shell, the left shell and the middle support sleeve jointly form an oil cylinder outer shell, a main shaft is arranged in the oil cylinder outer shell and is positioned at the right side position in the oil cylinder outer shell, and a rotating shaft sleeve is fixedly arranged on the outer circumference of the main shaft. The outer circumference of the right side of the rotating shaft sleeve is in rotating sealing connection with the inner circumference of the rightmost side of the right shell, a supporting boss is arranged on the inner circumference of the right shell, the left side portion of the rotating shaft sleeve and the left side end of the supporting boss are axially and rotationally supported, and the right side portion of the rotating shaft sleeve and the right side end of the supporting boss are axially and rotationally supported. According to the swing oil cylinder, by shortening the length of the main shaft, the bending moment of the main shaft is reduced, it can be guaranteed that when the oil cylinder operates for a long time, the whole structure of the oil cylinder cannot be distorted, and the problems that noise is large during operation and hydraulic oil leaks are avoided. The swing oil cylinder can be widely applied to swing oil cylinders.

Description

TECHNICAL FIELD

[0001] The utility model relates to a swing oil cylinder, in particular to a swing oil cylinder for anti-bending rock drilling jumbo. BACKGROUND

[0002] The swing oil cylinder is a kind of hydraulic actuating element for converting hydraulic energy into rotary mechanical energy, mainly used to realize the limited angle swing rotation of mechanical components.

[0003] At present, for the swing oil cylinder for rock drilling jumbo, due to the longer length of the main shaft inside, at the same time, the rock drill is only fixedly connected with one side of the main shaft, which leads to the bending deformation of the main shaft under the gravity of the rock drill in a long time swing operation.

[0004] When the main shaft appears small-range bending deformation, the oil cylinder can still be used, but the running noise becomes larger, and at the same time, the problem of hydraulic oil leakage occurs in different degrees, when large-range bending deformation occurs, it will directly lead to the oil cylinder unable to use, reducing the service life. UTILITY MODEL CONTENTS

[0005] The utility model provides a swing oil cylinder for anti-bending rock drilling jumbo, in the swing oil cylinder, the length of the main shaft is shortened, so that the bending moment is smaller, when the oil cylinder is operated for a long time, the problem of bending deformation of the main shaft under the long-term gravity of the rock drill can be avoided, the bending strength is increased, so that the problems of larger noise during operation and hydraulic oil leakage are avoided, and the service life is prolonged.

[0006] Therefore, the technical scheme of the utility model is a swing oil cylinder for anti-bending rock drilling jumbo, which is provided with a right shell, a left shell and an intermediate support sleeve, the right shell, the left shell and the intermediate support sleeve are all hollow structures, the right shell is located at the right side of the intermediate support sleeve, the left shell is located at the left side of the intermediate support sleeve, the right shell and the left shell are axially sealed and fixed with the intermediate support sleeve, and the right shell, the left shell and the intermediate support sleeve jointly form an oil cylinder shell body.

[0007] The inside of the oil cylinder shell body is provided with a main shaft, the main shaft is located at the right side of the inside of the oil cylinder shell body, the outer circumference of the main shaft is provided with a rotating shaft sleeve, the rotating shaft sleeve is composed of a rotating shaft sleeve left segment and a rotating shaft sleeve right segment, the outer circumference of the rotating shaft sleeve right segment is rotatably and sealingly connected with the rightmost inner circumference of the right shell, and the inner circumference of the rotating shaft sleeve right segment is sealingly and fixedly connected with the right side outer circumference of the main shaft.

[0008] The inner circumference of the right shell is provided with a support boss, the left side of the left section of the rotating shaft sleeve and the left end of the support boss are axially rotatably supported, the right section of the rotating shaft sleeve and the right end of the support boss are axially rotatably supported, and the outer circumference of the left section of the rotating shaft sleeve is rotatably sealed with the inner circumference of the support boss;

[0009] The oil cylinder outer shell, the main shaft and the rotating shaft sleeve jointly form an oil cavity.

[0010] The main shaft and the left section of the rotating shaft sleeve are provided with a rotary piston, the rotary piston is composed of a rotary piston rotary sealing section and a rotary piston meshing rotary section, the rotary piston rotary sealing section is located at the left section of the rotary piston, and the rotary piston meshing rotary section is located at the right section of the rotary piston.

[0011] The rotary piston rotary sealing section is located inside the left shell, the outer circumference of the rotary piston rotary sealing section is rotatably sealed with the inner circumference of the left shell, the outer circumference of the rotary piston meshing rotary section is rotatably connected with the inner circumference of the intermediate support sleeve, and the inner circumference of the rotary piston meshing rotary section is rotatably connected with the outer circumference of the main shaft.

[0012] The rotary piston rotary sealing section divides the oil cavity into a left oil cavity and a right oil cavity, the left shell is respectively provided with a left oil hole and a right oil hole, and the left oil hole and the right oil hole are respectively connected with the left oil cavity and the right oil cavity.

[0013] Preferably, the outer circumference of the leftmost left section of the rotating shaft sleeve is provided with a locking nut, the inner circumference of the locking nut is fixedly connected with the outer circumference of the left section of the rotating shaft sleeve, the outer circumference of the locking nut is rotatably supported with the inner circumference of the right shell, the right end of the locking nut is provided with a bearing between the left end of the support boss, and the locking nut and the support boss are axially rotatably supported through the bearing.

[0014] Preferably, after the locking nut is fixed, the left end surface of the locking nut is located at the right side of the left end surface of the left section of the rotating shaft sleeve, the left side of the locking nut and the left section of the rotating shaft sleeve is provided with a locking flange at the outer circumference of the rotary piston meshing rotary section, the locking flange is provided with an axially penetrating through hole at the axial position of the locking nut, the left end of the locking nut is provided with a slot, and the through hole of the locking flange and the slot of the locking nut are threadedly locked through a screw, so as to axially lock the rotating shaft sleeve and the support boss.

[0015] Preferably, the right inner circumference of the right shell is provided with a plurality of axially arranged grooves, the interiors of the plurality of grooves are respectively provided with a dustproof sealing ring and a rotary support pad from outside to inside, and the outer circumference of the right section of the rotating shaft sleeve and the rightmost inner circumference of the right shell are rotatably sealed and rotatably supported through the dustproof sealing ring and the rotary support pad respectively.

[0016] A rotating support pad is arranged between the left end of the right section of the rotating sleeve and the right end of the support boss, and the right section of the rotating sleeve and the support boss are axially rotationally supported by the rotating support pad;

[0017] The inner circumference of the support boss is provided with a groove, and the groove is internally provided with an oil seal ring. The inner circumference of the support boss and the outer circumference of the left section of the rotating sleeve are rotationally sealed by the oil seal ring.

[0018] The inner circumference of the right shell at the position of the locking nut is provided with a groove, and the groove is internally provided with a rotating support pad. The outer circumference of the locking nut and the inner circumference of the right shell are rotationally supported by the rotating support pad.

[0019] The outer circumference of the rotating piston rotationally sealed section is provided with a plurality of axially arranged grooves. The inner portions of the plurality of grooves are respectively provided with oil seal rings and rotating support pads. The oil seal rings are located at the axial positions on both sides of the rotating support pads. The outer circumference of the rotating piston rotationally sealed section and the inner circumference of the left shell are respectively rotationally sealed and rotationally supported by the oil seal rings and the rotating support pads.

[0020] Preferably, the outermost end of the left shell is provided with an axially penetrating through hole. The central position of the rotating piston rotationally sealed section is provided with an axially penetrating through hole. The left end of the main shaft is provided with a slot hole. The two through holes and the slot hole are concentrically arranged. A synchronous rotating shaft is arranged in the slot hole of the main shaft. The leftmost position of the synchronous rotating shaft is located inside the through hole of the left shell and is rotationally sealed with the inner circumference of the through hole. The rightmost position of the synchronous rotating shaft is located inside the slot hole of the main shaft and is fixedly connected with the slot hole. The middle position of the synchronous rotating shaft is located inside the through hole of the rotating piston rotationally sealed section. The inner circumference of the rotating piston rotationally sealed section is rotationally sealed with the middle position of the synchronous rotating shaft. The rotating piston rotationally sealed section can be left and right rotationally translated along the middle position of the synchronous rotating shaft.

[0021] Preferably, the inner circumference of the through hole on the left shell is provided with a plurality of axially arranged grooves. The inner portions of the plurality of grooves are respectively provided with dustproof seal rings, oil seal rings and rotating support pads. The dustproof seal rings, the oil seal rings and the rotating support pads are sequentially arranged from outside to inside. The inner circumference of the through hole on the left shell and the leftmost outer circumference of the synchronous rotating shaft are respectively rotationally sealed and rotationally supported by the dustproof seal rings, the oil seal rings and the rotating support pads.

[0022] The inner circumference of the rotating piston rotationally sealed section is provided with a plurality of axially arranged grooves. The inner portions of the plurality of grooves are respectively provided with oil seal rings and rotating support pads. The oil seal rings are respectively located at the axial positions on both sides of the rotating support pads. The inner circumference of the rotating piston rotationally sealed section and the middle position of the synchronous rotating shaft are respectively rotationally sealed and rotationally supported by the oil seal rings and the rotating support pads.

[0023] The utility model discloses beneficial effect is:

[0024] 1. by shortening the length of the main shaft, reduce the bending moment of the main shaft, so that the main force position of the oil cylinder concentrates in the right side of the oil cylinder, when working, the outside of right casing connects the jumbo arm, the rock drill is fixedly connected with the rotation shaft sleeve right section part, because the bending moment of the main shaft is shortened, when the oil cylinder runs for a long time, the problem of bending deformation of the main shaft under the long-term gravity of the rock drill can be avoided, the problem of the noise being large and the hydraulic oil leaking when running is avoided, and the service life is prolonged.

[0025] 2. because the synchronous rotating shaft is installed at the left side end portion of the main shaft, the leftmost end portion of the synchronous rotating shaft can be installed with an encoder, the rotation angle of the main shaft can be monitored in real time through the encoder, and corresponding adjustment can be made according to actual requirements, which is convenient and fast and the effect is intuitive.

[0026] 3. because the left side of the locking nut and the left side of the rotation shaft sleeve left section part are located at the outer circumferential position of the rotation piston meshing rotation section, the locking flange is provided with a through hole penetrating in the axial direction at the axial position of the locking nut, the left side end portion of the locking nut is provided with a slot, the screw is screwed and locked through the through hole on the locking flange and the slot on the locking nut, the axial locking between the rotation shaft sleeve and the supporting boss is realized, the rotation shaft sleeve is further axially locked through the locking flange, on the one hand, the strength and stability of the support between the rotation shaft sleeve and the supporting boss can be increased, the axial gap of the rotation shaft sleeve during rotation is further ensured, the rotation stability of the rotation shaft sleeve is improved, on the other hand, because the left side end face of the locking nut is located at the right side position of the left side end face of the rotation shaft sleeve left section part after the locking nut is fixed, the locking nut is continuously subjected to the pulling force caused by the screw through the axial locking of the screw and the locking nut, the problem of loosening of the locking nut in high-frequency vibration can be avoided, and the overall structural stability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the perspective view of the utility model;

[0028] Figure 2 It is another perspective view of the utility model;

[0029] Figure 3 It is the front view of the utility model;

[0030] Figure 4 It is the Figure 3 A-A section view of the utility model;

[0031] Figure 5 It is the Figure 4 B place enlarged view of the utility model.

[0032] Explanation of symbols in the figure:

[0033] 1. right shell; 101. support boss; 2. left shell; 3. intermediate support sleeve; 4. main shaft; 5. rotary piston; 501. rotary piston rotary sealing section; 502. rotary piston meshing rotary section; 6. rotary shaft sleeve; 601. rotary shaft sleeve left section; 602. rotary shaft sleeve right section; 7. bearing; 8. locking nut; 9. locking flange; 10. oil cavity; 1001. left oil cavity; 1002. right oil cavity; 11. left oil hole; 12. right oil hole; 13. dustproof sealing ring; 14. oil seal ring; 15. rotary support pad; 16. synchronous rotating shaft; 17. oil cylinder outer shell. DETAILED DESCRIPTION

[0034] The utility model will be further described below in combination with the embodiments.

[0035] Through Figures 1-5 It can be seen that the anti-bending swing cylinder for rock drilling rig has a right shell 1, a left shell 2, and an intermediate support sleeve 3. The right shell 1, the left shell 2, and the intermediate support sleeve 3 are all hollow structures. The right shell 1 is located at the right side of the intermediate support sleeve 3, and the left shell 2 is located at the left side of the intermediate support sleeve 3. The right shell 1 and the left shell 2 are axially sealed and fixed with the intermediate support sleeve 3, and the right shell 1, the left shell 2, and the intermediate support sleeve 3 jointly form an oil cylinder outer shell 17.

[0036] The oil cylinder outer shell 17 is internally provided with a main shaft 4. The main shaft 4 is located at the right side inside the oil cylinder outer shell 17. The outer circumference of the main shaft 4 is provided with a rotary shaft sleeve 6. The rotary shaft sleeve 6 is composed of a rotary shaft sleeve left section 601 and a rotary shaft sleeve right section 602. The outer circumference of the rotary shaft sleeve right section 602 is rotationally sealed and connected with the rightmost inner circumference of the right shell 1. The inner circumference of the rotary shaft sleeve right section 602 is sealingly and fixedly connected with the right side outer circumference of the main shaft 4.

[0037] According to Figure 4 It can be seen that the length of the main shaft 4 is close to half the length of the oil cylinder outer shell 17. By shortening the length of the main shaft 4, the bending moment of the main shaft 4 can be shortened. The main force position of the oil cylinder is located at the right side of the oil cylinder. The overall bending moment of the oil cylinder is obviously shortened. When working, the outside of the right shell 1 is connected with the rock drilling rig arm. The rock drill is fixedly connected with the rotary shaft sleeve right section 602. Since the length of the main shaft 4 is shortened, its bending moment is shortened. When the oil cylinder is operated for a long time, the problem of bending deformation of the main shaft under the long-term gravity of the rock drill can be avoided. Thus, the problems of large noise during operation and hydraulic oil leakage can be avoided, and the service life is prolonged.

[0038] The inner circumference of the right shell 1 is provided with a support boss 101, the left side of the rotating shaft sleeve left section 601 and the left end of the support boss 101 are axially rotatably supported, the rotating shaft sleeve right section 602 and the right end of the support boss 101 are axially rotatably supported, and the outer circumference of the rotating shaft sleeve left section 601 is rotatably sealed with the inner circumference of the support boss 101, which can avoid the axial gap of the rotating shaft sleeve 6 during long-time rotation, ensure the swing accuracy of the rotating shaft sleeve 6 and the main shaft 4, and improve the work efficiency.

[0039] The oil cylinder outer shell 17, the main shaft 4 and the rotating shaft sleeve 6 jointly form an oil cavity 10.

[0040] The main shaft 4 and the rotating shaft sleeve left section 601 are provided with a rotating piston 5, which is composed of a rotating piston rotating sealing section 501 and a rotating piston meshing rotating section 502. The rotating piston rotating sealing section 501 is located at the left section of the rotating piston 5, and the rotating piston meshing rotating section 502 is located at the right section of the rotating piston 5. The rotating piston rotating sealing section 501 is located inside the left shell 2, and the outer circumference of the rotating piston rotating sealing section 501 is rotatably sealed with the inner circumference of the left shell 2. The outer circumference of the rotating piston meshing rotating section 502 is rotatably connected with the inner circumference of the intermediate support sleeve 3, and the inner circumference of the rotating piston meshing rotating section 502 is rotatably connected with the outer circumference of the main shaft 4, so as to realize the axial rotation and translation of the rotating piston 5.

[0041] The rotating piston rotating sealing section 501 divides the oil cavity 10 into a left oil cavity 1001 and a right oil cavity 1002. The left shell 2 is respectively provided with a left oil hole 11 and a right oil hole 12, which are respectively connected with the left oil cavity 1001 and the right oil cavity 1002, so as to realize the transmission of hydraulic oil.

[0042] In a specific embodiment, the outer circumference of the leftmost side of the rotating sleeve left segment 601 is provided with a locking nut 8, the inner circumference of the locking nut 8 is fixedly connected with the outer circumference of the rotating sleeve left segment 601, the outer circumference of the locking nut 8 is rotatably supported with the inner circumference of the right shell 1, the right side end of the locking nut 8 is provided with a bearing 7 between the left side end of the supporting boss 101, the locking nut 8 and the supporting boss 101 are axially rotatably supported through the bearing 7, the rotating sleeve 6 and the adjacent components can be quickly assembled and overhauled through the locking nut 8, the stability and rotation accuracy of the rotating sleeve 6 can be increased by using the bearing 7, the bearing 7 can be selected as an oil-free bearing, since the oil-free bearing has excellent self-lubricating performance, it can eliminate the environmental pollution problem caused by lubricating oil leakage, and the oil-free bearing has excellent high and low temperature resistance, it can operate in an extreme temperature range, such as a theoretical temperature range of -200℃ to 600℃, the oil-free bearing can still maintain excellent durability and performance stability at extreme temperatures, further improving the application environment range of the oil cylinder, and maximizing the guarantee that the oil cylinder can also play its excellent operating performance when applied in extreme environments, and the oil-free bearing has sufficient supporting strength, which can ensure that the oil cylinder has sufficient bearing support force when operating under large torsion output.

[0043] In a specific embodiment, after the locking nut 8 is fixed, the left side end surface of the locking nut 8 is located at the right side of the left side end surface of the rotating sleeve left segment 601, the left side of the locking nut 8 and the rotating sleeve left segment 601 is provided with a locking flange 9 at the outer circumference of the rotating piston engagement rotating segment 502, the locking flange 9 is provided with an axially penetrating through hole at the axial position of the locking nut 8, the left side end of the locking nut 8 is provided with a slot, and the through hole of the locking flange 9 and the slot of the locking nut 8 are threadedly locked by a screw, thereby achieving the axial locking between the rotating sleeve 6 and the supporting boss 101, and the rotating sleeve 6 is further axially locked by using the locking flange 9, which can increase the strength and stability of the support between the rotating sleeve 6 and the supporting boss 101, increase the bending strength of the main shaft 4 and the rotating sleeve 6 as a whole, further avoid the bending deformation of the main shaft 4 and the rotating sleeve 6 under the long-term gravity of the rock drill, prolong the service life, and on the other hand, since the left side end surface of the locking nut 8 is located at the right side of the left side end surface of the rotating sleeve left segment 601 after the locking nut 8 is fixed, the locking nut 8 can be axially locked with the locking nut 8 by a screw, which can avoid the loosening problem of the locking nut 8 in high-frequency vibration, and improve the overall structural stability.

[0044] In a specific embodiment, the right side inner circumference of the right shell 1 is provided with a plurality of axially arranged grooves, the interiors of the plurality of grooves are respectively provided with dustproof sealing rings 13 and rotating support pads 15 from outside to inside, the outer circumference of the rotating shaft sleeve right section 602 and the rightmost inner circumference of the right shell 1 are respectively realized mutual rotating sealing and mutual rotating support through the dustproof sealing rings 13 and the rotating support pads 15, the left side end of the rotating shaft sleeve right section 602 and the right side end of the support boss 101 are provided with rotating support pads 15, the rotating shaft sleeve right section 602 and the support boss 101 are realized axial rotating support through the rotating support pads 15, the inner circumference of the support boss 101 is provided with a groove, the interior of the groove is provided with an oil seal ring 14, the inner circumference of the support boss 101 and the outer circumference of the rotating shaft sleeve left section 601 are realized rotating sealing through the oil seal ring 14, the inner circumference of the right shell 1 at the position of the locking nut 8 is provided with a groove, the interior of the groove is provided with a rotating support pad 15, the outer circumference of the locking nut 8 and the inner circumference of the right shell 1 are realized rotating support through the rotating support pad 15, the outer circumference of the rotating piston rotating sealing section 501 is provided with a plurality of axially arranged grooves, the interiors of the plurality of grooves are respectively provided with oil seal rings 14 and rotating support pads 15, the oil seal rings 14 are located at the positions on both sides of the rotating support pads 15, the outer circumference of the rotating piston rotating sealing section 501 and the inner circumference of the left shell 2 are respectively realized mutual rotating sealing and mutual rotating support through the oil seal rings 14 and the rotating support pads 15.

[0045] Wherein, through the dustproof sealing ring 13, impurities in the external environment can be prevented from entering the oil cylinder interior through the gap, thereby preventing damage to the internal components.

[0046] Wherein, through the oil seal ring 14, the hydraulic oil in the oil cylinder interior can be prevented from leaking outward, and hydraulic oil leakage will directly affect the stability of the oil cylinder operating pressure, causing pressure relief, leading to unstable rotation angle during oil cylinder operation, and reducing work precision.

[0047] Wherein, the wear-resistant support pad 15 is made of PTFE + copper powder, phenolic cloth, wood-based, nylon, and other materials with high wear resistance, high dry running characteristics, high support force, and high guiding stability. By setting the wear-resistant support pad 15, on the one hand, the stability of the corresponding rotating parts during relative rotation can be improved, and on the other hand, direct friction between the rotating parts can be avoided, thereby preventing knocking and wear, and prolonging the service life.

[0048] In addition, the wear-resistant support pad 15 also has good heat conduction performance, which can reduce the temperature of its surrounding components and prevent high-temperature damage to the surrounding components, such as high-temperature damage to the sealing ring.

[0049] In a specific embodiment, the outermost end of the left shell 2 is provided with an axially-through hole, the central position of the rotating piston rotating sealing section 501 is provided with an axially-through hole, the left end of the main shaft 4 is provided with a slot hole, the two through holes and the slot hole are concentrically arranged, the slot hole of the main shaft 4 is provided with a synchronous rotating shaft 16, the leftmost position of the synchronous rotating shaft 16 is located inside the through hole of the left shell 2 and is in rotational sealing connection with the inner circumference of the through hole, the rightmost position of the synchronous rotating shaft 16 is located inside the slot hole of the main shaft 4 and is fixedly connected with the slot hole, the middle position of the synchronous rotating shaft 16 is located inside the through hole of the rotating piston rotating sealing section 501, and the inner circumference of the rotating piston rotating sealing section 501 is in rotational sealing connection with the middle position of the synchronous rotating shaft 16, and the rotating piston rotating sealing section 501 can rotate and translate left and right along the middle position of the synchronous rotating shaft 16.

[0050] The leftmost end of the synchronous rotating shaft 16 can be provided with an encoder, and the rotating angle of the main shaft 4 can be monitored in real time through the encoder, and corresponding adjustment can be made according to actual needs, which is convenient and fast and intuitive in effect.

[0051] In a specific embodiment, the inner circumference of the through hole on the left shell 2 is provided with a plurality of axially-arranged grooves, the inner part of the plurality of grooves is respectively provided with a dustproof sealing ring 13, an oil sealing ring 14 and a rotating support pad 15, the dustproof sealing ring 13, the oil sealing ring 14 and the rotating support pad 15 are sequentially arranged from outside to inside, and the inner circumference of the through hole on the left shell 2 and the leftmost outer circumference of the synchronous rotating shaft 16 are respectively in mutual rotational sealing and mutual rotational support through the dustproof sealing ring 13, the oil sealing ring 14 and the rotating support pad 15, the inner circumference of the rotating piston rotating sealing section 501 is provided with a plurality of axially-arranged grooves, the inner part of the plurality of grooves is respectively provided with an oil sealing ring 14 and a rotating support pad 15, the oil sealing ring 14 is respectively located at the axial two side positions of the rotating support pad 15, and the inner circumference of the rotating piston rotating sealing section 501 and the middle position of the synchronous rotating shaft 16 are respectively in mutual rotational sealing and mutual rotational support through the oil sealing ring 14 and the rotating support pad 15.

[0052] The above is only a specific embodiment of the utility model, and cannot limit the scope of the utility model, so the replacement of equivalent components or equivalent changes and modifications made within the scope of the utility model patent protection should still fall within the scope of the utility model claims.

Claims

1. A swing cylinder for a rock bolting jumbo, characterized in that: The utility model provides a right shell, left shell, intermediate support cover are provided with, right shell, left shell, intermediate support cover are all hollow structure, right shell is located intermediate support cover's right side position, left shell is located intermediate support cover's left side position, right shell and left shell respectively with intermediate support cover axial seal fixed, right shell, left shell, intermediate support cover jointly form the oil cylinder outer shell body together, The inside of the oil cylinder outer shell body is provided with a main shaft, the main shaft is located at the right side position in the oil cylinder outer shell body, the outer circumference of the main shaft is provided with a rotating shaft sleeve, the rotating shaft sleeve is composed of a rotating shaft sleeve left segment and a rotating shaft sleeve right segment, the outer circumference of the rotating shaft sleeve right segment is rotatably connected with the inner circumference of the rightmost right shell, and the inner circumference of the rotating shaft sleeve right segment is fixedly connected with the outer circumference of the right side of the main shaft. The inner circumference of the right shell is provided with a support boss, the left side of the rotating shaft sleeve left segment is rotatably supported with the left side end of the support boss, the rotating shaft sleeve right segment is rotatably supported with the right side end of the support boss, and the outer circumference of the rotating shaft sleeve left segment is rotatably sealed with the inner circumference of the support boss. The oil cylinder outer shell body, the main shaft and the rotating shaft sleeve form an oil cavity together. The main shaft and the rotating shaft sleeve left segment are provided with a rotating piston, the rotating piston is composed of a rotating piston rotating seal segment and a rotating piston meshing rotating segment, the rotating piston rotating seal segment is located at the left segment position of the rotating piston, and the rotating piston meshing rotating segment is located at the right segment position of the rotating piston. The rotating piston rotating seal segment is located in the left shell, the outer circumference of the rotating piston rotating seal segment is rotatably connected with the inner circumference of the left shell, the outer circumference of the rotating piston meshing rotating segment is rotatably connected with the inner circumference of the intermediate support cover, and the inner circumference of the rotating piston meshing rotating segment is rotatably connected with the outer circumference of the main shaft. The rotating piston rotating seal segment divides the oil cavity into a left oil cavity and a right oil cavity, the left shell is respectively provided with a left oil hole and a right oil hole, and the left oil hole and the right oil hole are respectively connected with the left oil cavity and the right oil cavity.

2. The anti-bend jumbo swing cylinder according to claim 1, characterized in that: The outer circumference of the leftmost left of the rotating shaft sleeve left segment is provided with a locking nut, the inner circumference of the locking nut is fixedly connected with the outer circumference of the rotating shaft sleeve left segment, the outer circumference of the locking nut is rotatably supported with the inner circumference of the right shell, and the right side end of the locking nut is provided with a bearing between the left side end of the support boss.

3. The anti-bend jumbo swing cylinder according to claim 2, characterized in that: After the locking nut is fixed, the left side end surface of the locking nut is located at the right side position of the left side end surface of the rotating shaft sleeve left segment, the left side of the locking nut and the rotating shaft sleeve left segment is provided with a locking flange at the outer circumference position of the rotating piston meshing rotating segment, an axial through hole is arranged on the locking flange at the axial position of the locking nut, the left side end of the locking nut is provided with a slot hole, a screw is screwed through the through hole on the locking flange and the slot hole on the locking nut, and the axial locking between the rotating shaft sleeve and the support boss is realized.

4. The anti-bend jumbo swing cylinder according to claim 3, characterized in that: The right side inner circumference of the right shell is provided with a plurality of axially arranged grooves, the interiors of the plurality of grooves are respectively provided with dustproof sealing rings and rotary support pads from outside to inside, the outer circumference of the right section of the rotary shaft sleeve and the rightmost inner circumference of the right shell are respectively realized mutual rotary sealing and mutual rotary support through the dustproof sealing rings and the rotary support pads; The left side end of the right section of the rotary shaft sleeve and the right side end of the support boss are provided with a rotary support pad, the right section of the rotary shaft sleeve and the support boss are realized axial rotary support through the rotary support pad; The inner circumference of the support boss is provided with a groove, the interior of the groove is provided with an oil seal ring, the inner circumference of the support boss and the outer circumference of the left section of the rotary shaft sleeve are realized rotary sealing through the oil seal ring; The inner circumference of the right shell is provided with a groove at the position of the locking nut, the interior of the groove is provided with a rotary support pad, the outer circumference of the locking nut and the inner circumference of the right shell are realized rotary support through the rotary support pad; The outer circumference of the rotary piston rotary sealing section is provided with a plurality of axially arranged grooves, the interiors of the plurality of grooves are respectively provided with oil seal rings and rotary support pads, the oil seal rings are located at the positions on both sides of the rotary support pads, the outer circumference of the rotary piston rotary sealing section and the inner circumference of the left shell are respectively realized mutual rotary sealing and mutual rotary support through the oil seal rings and the rotary support pads.

5. The anti-bend jumbo swing cylinder according to claim 4, characterized in that: The outermost end of the left shell is provided with an axially penetrating through hole, the central position of the rotary piston rotary sealing section is provided with an axially penetrating through hole, the left side end of the main shaft is provided with a slot hole, the two through holes and the slot hole are concentrically arranged, the main shaft is provided with a synchronous rotating shaft in the slot hole, the leftmost position of the synchronous rotating shaft is located in the interior of the through hole of the left shell and is in rotary sealing connection with the inner circumference of the through hole, the rightmost position of the synchronous rotating shaft is located in the slot hole of the main shaft and is in fixed connection with the slot hole, the middle position of the synchronous rotating shaft is located in the through hole of the rotary piston rotary sealing section, the inner circumference of the rotary piston rotary sealing section is in rotary sealing connection with the middle position of the synchronous rotating shaft, and the rotary piston rotary sealing section can rotate and translate left and right along the middle position of the synchronous rotating shaft.

6. The anti-bend jumbo swing cylinder according to claim 5, characterized in that: The inner circumference of the through hole on the left shell is provided with a plurality of axially arranged grooves, the interiors of the plurality of grooves are respectively provided with dustproof sealing rings, oil seal rings and rotary support pads, the dustproof sealing rings, the oil seal rings and the rotary support pads are sequentially arranged from outside to inside, the inner circumference of the through hole on the left shell and the leftmost outer circumference of the synchronous rotating shaft are respectively realized mutual rotary sealing and mutual rotary support through the dustproof sealing rings, the oil seal rings and the rotary support pads; The inner circumference of the rotary piston rotary sealing section is provided with a plurality of axially arranged grooves, the interiors of the plurality of grooves are respectively provided with oil seal rings and rotary support pads, the oil seal rings are respectively located at the axial positions on both sides of the rotary support pads, and the inner circumference of the rotary piston rotary sealing section and the middle position of the synchronous rotating shaft are respectively realized mutual rotary sealing and mutual rotary support through the oil seal rings and the rotary support pads.

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