Elastic torque transmission swing oil cylinder

Abstract

The utility model discloses an elastic torque transmission swing oil cylinder, and belongs to the technical field of swing oil cylinders. The swing oil cylinder comprises a swing oil cylinder barrel body and end cover assemblies connected to the swing oil cylinder barrel body, a center shaft arranged in the axial direction of the swing oil cylinder barrel body is arranged in the swing oil cylinder barrel body, the end cover assemblies comprise the first end cover assembly and the second end cover assembly, and the center shaft is arranged on the inner circumferential side of the first end cover assembly; an elastic piece and a connecting support are further included, the elastic piece is connected with the end cover assemblies and the connecting support in a matched mode, the elastic piece can conduct reversible elastic deformation, the connecting support is connected with the first end cover assembly, and the elastic piece is arranged between the first end cover assembly and the connecting support. According to the utility model, the elastic torque transmission between the end part of the end cover component and the connecting bracket is realized through the elastic piece, the problems of fracture and failure of a rigid bolt connected with the end part of the end cover component of the traditional oscillating oil cylinder are solved, the reliability and the stability of the device are improved, and the device is convenient to disassemble and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of swing cylinders, and more specifically, relates to an elastic torque transmission swing cylinder. Background Art

[0002] A swing cylinder is an important hydraulic component. It uses hydraulic pressure to push a piston to make the cylinder swing, and utilizes hydraulics to accumulate a relatively high torque in a small space, and is widely used in fields that require limited rotational motion and large torque.

[0003] At present, in the application field of swing cylinders, especially in the field of wet concrete spraying manipulators, the swing cylinder in the wet concrete spraying manipulator is an important component of the wet concrete spraying manipulator. The existing swing cylinder is connected to a connecting frame through bolts. However, after the swing cylinder works for a certain period of time, when the external working components of the swing cylinder are impacted by external forces, the impact force will be transmitted to the connecting part of the swing cylinder connecting frame, and the connecting bolts will become loose. If not observed in time, the nuts will fall off or the circumferential connecting bolts of the connecting frame will be cut off, resulting in connection failure, and ultimately the connecting frame will fall off, which not only affects the normal use of the equipment, delays the construction progress, but also may cause personal injuries and lead to serious economic losses.

[0004] Moreover, for the swing cylinder of the existing wet concrete spraying manipulator that uses connecting bolts to connect to the connecting frame, due to the complex connection, during the daily maintenance process, the staff needs to spend a lot of time for disassembly, wasting manpower and time, and affecting the construction efficiency. Summary of the Utility Model

[0005] The utility model aims at the technical problems existing in the prior art and provides an elastic torque transmission swing cylinder.

[0006] To solve the above technical problems, the utility model includes a swing cylinder barrel and an end cover assembly connected to the swing cylinder barrel. A central shaft is arranged axially inside the swing cylinder barrel. The end cover assembly includes a first end cover assembly and a second end cover assembly. The central shaft is arranged on the inner peripheral side of the first end cover assembly;

[0007] It further includes an elastic member and a connecting bracket. The elastic member is cooperatively connected with the end cover assembly and the connecting bracket. The elastic member can undergo reversible elastic deformation. The connecting bracket is connected to the first end cover assembly, and the elastic member is arranged between the first end cover assembly and the connecting bracket.

[0008] Preferably, the connecting bracket is connected to the end of the first end cover assembly. A first connecting portion is arranged at the end of the first end cover assembly. A second connecting portion is arranged on the connecting bracket. The elastic member is connected to the first connecting portion and the second connecting portion;

[0009] The first end of the central shaft passes through the oscillating oil cylinder barrel and the end cover assembly and is connected to the connecting bracket. A locking member is connected to the second end of the central shaft, and the locking member realizes the locking connection of the first end cover assembly, the elastic member and the connecting bracket.

[0010] Preferably, the elastic member is an annular plate structure with a central through hole. The end of the central shaft passes through the central through hole of the elastic member and is connected to the connecting bracket; the cross-sectional shapes of the first connecting portion and the second connecting portion are adapted to the cross-sectional shape of the elastic member, and the left and right ends of the elastic member are respectively in contact connection with the first end cover assembly and the connecting bracket.

[0011] Preferably, the first connecting portion includes a first fixing groove, the second connecting portion includes a second fixing groove, and a connecting through hole adapted to the central through hole of the elastic member is provided in the second fixing groove; the elastic member is coaxially arranged in cooperation with the central shaft, the first end cover assembly and the connecting bracket, and the cross-section of the elastic member is a regular geometric shape.

[0012] Preferably, the thickness of the elastic member is adapted to the sum of the depths of the first fixing groove and the second fixing groove, and the cross-sectional shape of the elastic member is a polygonal cycloid arc shape, a plum blossom shape, a regular polygon shape or a cross shape.

[0013] Preferably, the elastic member is a curved plate structure with a radian, a connecting clamping groove is provided on the elastic member, the first connecting portion is a connecting convex block arranged on the side of the end of the first end cover assembly, and the connecting convex block is adapted to be connected with the connecting clamping groove of the elastic member; the second connecting portion includes a connecting groove, the connecting groove is arranged along the circumference of the connecting bracket, and the connecting groove is adapted to be connected with the elastic member and the connecting convex block.

[0014] Preferably, a plurality of elastic members are provided, and the number of the elastic members is matched with the number of the connecting convex blocks and the connecting grooves. The shape and size of the connecting convex blocks are adapted to the connecting clamping grooves, the connecting convex blocks are circumferentially and uniformly arranged along the side of the end of the first end cover assembly, and the connecting grooves are circumferentially and uniformly arranged along the circumference of the connecting bracket; the elastic member is a concave opening groove structure with a radian, and the elastic member is a symmetric structure.

[0015] Preferably, the elastic member is an elastic buffer assembly that can perform radial telescopic movement between the outer circumference of the first end cover assembly and the inner circumference of the connecting bracket. The first connecting portion includes a connecting protrusion, the cross-section of the connecting protrusion is a regular geometric shape, and a through hole structure is provided in the middle of the connecting protrusion. The second connecting portion includes a connecting through hole adapted to be connected with the connecting protrusion.

[0016] Preferably, at least one elastic member is provided, and the elastic member includes a spring and a steel ball. One end of the steel ball is in contact connection with the spring, and the second end of the steel ball cooperates with the connecting protrusion; a spring steel ball groove matched with the number of the elastic members is provided on the side wall of the connecting through hole, the elastic member is arranged in the spring steel ball groove, and the size of the steel ball is adapted to the size of the spring steel ball groove; the cross-section of the connecting protrusion is an annular structure, and the cross-section of the connecting through hole is a circular structure.

[0017] Preferably, through-hole structures connected to the central axis are provided in the middle of the first end cover assembly and the connection bracket, the central axis is coaxially arranged with the end cover assembly and the connection bracket, and a mating part for connecting with the elastic member is provided on the side of the end of the first end cover assembly. Elastic torque transmission is achieved through the connection of the elastic member and the mating part.

[0018] Inner left and right cylinder ring chambers are respectively provided on the inner sides of both ends of the first end cover assembly. A support cylinder ring is arranged between the first end cover assembly and the central axis. The support cylinder ring includes a first support cylinder ring and a second support cylinder ring. The inner peripheral side of the support cylinder ring is coaxially arranged with the central axis, and the outer peripheral sides of the support cylinder ring are respectively attached and connected to the left cylinder ring chamber and the right cylinder ring chamber.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] By arranging the elastic member between the first end cover assembly and the connection bracket, the present utility model realizes the elastic torque transmission between the end of the end cover assembly and the connection bracket through the elastic member, solves the problems of fracture and failure of the rigid bolts at the end of the traditional swing oil cylinder end cover assembly, improves the reliability and stability of the device, and moreover, the present utility model does not use connection bolts, so the swing oil cylinder is convenient to disassemble and maintain. When the swing oil cylinder works, the externally connected assembly conducts torque and impact force, which are buffered and absorbed by the elastic member, so that the load is evenly distributed on the elastic member. The structure has strong anti-torsion and shear ability, which not only reduces the impact on the equipment and prolongs the service life of the equipment, but also has good durability and resilience for torque load, can continuously output large torque, and protects the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a cross-sectional view of the overall structure of the swing oil cylinder in Embodiment 1 of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the swing oil cylinder barrel in Embodiment 1 of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of the first end cover assembly in Embodiment 1 of the present utility model;

[0025] Figure 4 It is an axial cross-sectional view of the first end cover assembly in Embodiment 1 of the present utility model;

[0026] Figure 5 Structural schematic diagram of the piston sleeve in the first embodiment of the present utility model;

[0027] Figure 6 Structural schematic diagram of the central shaft in the first embodiment of the present utility model;

[0028] Figure 7 Structural schematic diagram of the connecting bracket in the first embodiment of the present utility model;

[0029] Figure 8 Structural schematic diagram of the elastic member in the first embodiment of the present utility model;

[0030] Figure 9 Structural schematic diagram of the installation structure of the connecting bracket in the first embodiment of the present utility model;

[0031] Figure 10 Overall structural sectional view of the swing oil cylinder in the second embodiment of the present utility model;

[0032] Figure 11 Structural schematic diagram of the elastic member in the second embodiment of the present utility model;

[0033] Figure 12 Structural schematic diagram of the first end cover assembly in the second embodiment of the present utility model;

[0034] Figure 13 Axial sectional view of the first end cover assembly in the second embodiment of the present utility model;

[0035] Figure 14 Structural schematic diagram of the connecting bracket in the second embodiment of the present utility model;

[0036] Figure 15 Overall structural sectional view of the swing oil cylinder in the third embodiment of the present utility model;

[0037] Figure 16 Structural schematic diagram of the first end cover assembly in the third embodiment of the present utility model;

[0038] Figure 17 Axial sectional view of the first end cover assembly in the third embodiment of the present utility model;

[0039] Figure 18 Structural schematic diagram of the connecting bracket in the third embodiment of the present utility model;

[0040] Figure 19 For the present utility model Figure 15 Partial enlarged structural schematic diagram at position A.

[0041] Explanation of symbol markings in the figure:

[0042] 1. Swing cylinder barrel; 101. Outer barrel; 102. Barrel base; 103. First oil hole; 104. Second oil hole; 105. Inner race positioning hole; 106. Left oil cavity; 107. Right oil cavity;

[0043] 2. Central shaft; 201. Main body section; 202. Locking section; 203. Limit connection section;

[0044] 3. First end cover assembly; 301. Left end cover part; 3011. Cylinder body end face seal groove; 3012. Cylinder body seal groove; 3013. Cylinder body guide groove; 3014. Left cylinder ring chamber; 302. Round shaft section; 303. Thread section; 304. End fixing section; 3041. Right cylinder ring chamber; 305. First fixing groove; 306. Annular boss; 307. Connection lug; 308. Connection projection;

[0045] 4. Second end cover assembly;

[0046] 5. Elastic member; 501. Connection card slot; 502. Spring; 503. Steel ball;

[0047] 6. Connection bracket; 601. Second fixing groove; 602. Connection through hole; 603. Connection groove; 604. Spring steel ball groove;

[0048] 7. Inner race; 701. Inner race positioning groove;

[0049] 8. Piston sleeve; 801. Outer helical teeth of piston sleeve; 802. Inner helical teeth of piston sleeve; 803. Outer seal groove of piston sleeve; 804. Inner seal groove of piston sleeve;

[0050] 9. Locking nut;

[0051] 10. First support cylinder ring;

[0052] 11. Second support cylinder ring. Detailed implementation manner

[0053] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0054] Please refer to Figure 1 , the present utility model provides an elastic torque transmission swing cylinder, which includes a swing cylinder barrel 1 and an end cover assembly connected to the swing cylinder barrel 1. A central shaft 2 is arranged inside the swing cylinder barrel 1 along its axial direction. The end cover assembly includes a first end cover assembly 3 and a second end cover assembly 4. The central shaft 2 is arranged on the inner peripheral side of the first end cover assembly 3;

[0055] It further includes an elastic member 5 and a connecting bracket 6. The elastic member 5 is cooperatively connected with the end cover assembly and the connecting bracket 6. The elastic member 5 can undergo reversible elastic deformation. The connecting bracket 6 is connected to the first end cover assembly 3, and the elastic member 5 is arranged between the first end cover assembly 3 and the connecting bracket 6.

[0056] In the present utility model, by arranging the elastic member 5 between the first end cover assembly 3 and the connecting bracket 6, elastic torque transmission between the end of the end cover assembly and the connecting bracket 6 is achieved through the elastic member 5, solving the problems of fracture and failure of the rigid bolts at the end connection of the traditional swing cylinder end cover assembly, improving the reliability and stability of the device. Moreover, the present utility model does not use connecting bolts, making the disassembly and maintenance of the swing cylinder convenient. When the swing cylinder works, the externally connected assembly conducts torque and impact force, which are buffered and absorbed by the elastic member 5, enabling the load to be evenly distributed on the elastic member 5. The structure has strong anti-torsion and shear capabilities, not only reducing the impact on the equipment and prolonging the service life of the equipment, but also having good durability and resilience against torque loads, being able to continuously output large torque and protecting the normal operation of the equipment.

[0057] The specific embodiments provided by the present utility model are described as follows.

[0058] Embodiment 1

[0059] Figure 1 It is a structural cross-sectional view of an elastic torque transmission swing cylinder provided by an embodiment of the present utility model. In this embodiment, the central shaft 2 is arranged at the central position inside the swing cylinder barrel 1, and the central shaft 2 is arranged along the axial direction of the swing cylinder barrel 1. The end of the central shaft 2 passes through the end cover assembly arranged inside the swing cylinder barrel 1, and the end extends through the first end cover assembly 3 to be connected with the connecting bracket 6, and the connecting bracket 6 is connected to the end of the first end cover assembly 3.

[0060] Specifically, the first end cover assembly 3 is arranged on the outer peripheral side of the central shaft 2, and the axial length of the first end cover assembly 3 is slightly less than the axial length of the central shaft 2. The outer peripheral side of the right end of the first end cover assembly 3 is connected with a second end cover assembly 4, and the second end cover assembly 4 is arranged in a fitting manner between the outer periphery of the first end cover assembly 3 and the inner periphery of the swing cylinder barrel 1.

[0061] In this embodiment, the central shaft 2, the swing cylinder barrel 1, the first end cover assembly 3, the second end cover assembly 4, and the connecting bracket 6 are coaxially arranged, improving the running smoothness and accuracy of the equipment, making the forces on each component uniform, and prolonging the service life of the equipment.

[0062] As Figure 2As shown in the figure, the swing cylinder barrel 1 includes an outer barrel 101, which is a horizontally arranged cylindrical structure. At the bottom of the outer surface of the outer barrel 101, a barrel base 102 is fixedly connected. The barrel base 102 is used to support the outer barrel 101 and the swing cylinder. Horizontally and successively on the outside of the outer barrel 101, there are a first oil hole 103 and a second oil hole 104. An inner race positioning hole 105 is also provided on the outer barrel 101.

[0063] Furthermore, as Figure 1 shown in the figure, in this embodiment, an inner race 7 and a piston sleeve 8 are also connected between the first end cover assembly 3 and the swing cylinder barrel 1. The piston sleeve 8 is arranged on the outside of the middle part of the first end cover assembly 3, and the outer peripheral side of the piston sleeve 8 is connected to the inner side of the swing cylinder barrel 1. The inner race 7 is arranged between the outer periphery of the piston sleeve 8 and the inner surface of the swing cylinder barrel 1.

[0064] Specifically, the inner peripheral side of the swing cylinder barrel 1 is coaxially provided with an inner race 7 and a piston sleeve 8. In the middle of the outer surface of the inner race 7, there is an inner race positioning groove 701. The inner race positioning groove 701 is arranged opposite to the inner race positioning hole 105 of the outer barrel 101. And on the inner surface of the inner race 7, there are inner race helical teeth. Through the inner race positioning hole 105 and the inner race positioning groove 701, the inner race 7 is installed and positioned, making it more convenient and fast to observe and perform tooling positioning during installation, reducing the installation difficulty, improving the work efficiency, and enhancing the reliability of the device and the convenience of maintenance.

[0065] In this embodiment, as Figure 3 、 Figure 4 shown in the figure, the first end cover assembly 3 includes a left end cover part 301, a round shaft section 302, a threaded section 303, and a terminal fixing section 304. The left end cover part 301, the round shaft section 302, the threaded section 303, and the terminal fixing section 304 are arranged in sequence from left to right to jointly form the structure of the first end cover assembly 3. On the inner side of the left end cover part 301, there are successively a cylinder end face sealing groove 3011, a cylinder sealing groove 3012, and a cylinder guiding groove 3013. Sealing elements are arranged inside both the cylinder end face sealing groove 3011 and the cylinder sealing groove 3012 for structural sealing. A guiding belt is arranged on the cylinder guiding groove 3013. The first end cover assembly 3 is rotatably connected to the outer barrel 101 on the outer peripheral side through the sealing elements in the cylinder end face sealing groove 3011 and the cylinder sealing groove 3012 and the guiding belt inside the cylinder guiding groove 3013.

[0066] Furthermore, helical teeth are provided on the outer surface of the threaded section 303 of the first end cover assembly 3. The terminal fixing section 304 is fixedly connected to the second end cover assembly 4 through the thread on its outer surface. The outer periphery of the second end cover assembly 4 is rotatably connected to the outer barrel 101.

[0067] In this embodiment, as Figure 1 、 Figure 5As shown in the figure, the piston sleeve 8 is arranged between the inner race 7 and the circular shaft section 302 and the threaded section 303 of the first end cover assembly 3. An external helical tooth 801 of the piston sleeve is provided on the outer surface of the right end of the piston sleeve 8, and the external helical tooth 801 of the piston sleeve is meshed and connected with the internal helical tooth of the inner surface of the inner race 7. An internal helical tooth 802 of the piston sleeve is provided on the inner surface of the right end of the piston sleeve 8, and the internal helical tooth 802 of the piston sleeve is meshed with the internal shaft helical tooth on the outer surface of the threaded section 303 of the inner first end cover assembly 3; an external seal groove 803 of the piston sleeve is provided on the outer surface of the left end of the piston sleeve 8, and an internal seal groove 804 of the piston sleeve is provided on the inner surface of the left end of the piston sleeve 8. Sealing members are provided inside the external seal groove 803 and the internal seal groove 804 of the piston sleeve. The outer surface of the left end of the piston sleeve 8 is rotationally and slidably connected with the outer cylinder body 101, and the inner surface of the left end of the piston sleeve 8 is rotationally and slidably connected with the circular shaft section 302 of the first end cover assembly 3 arranged inside; moreover, the left end cover part 301 of the first end cover assembly 3 and the circular shaft section 302, the outer cylinder body 101, and the piston sleeve 8 form a left oil cavity 106, and the left oil cavity 106 is communicated with the first oil hole 103. The second end cover assembly 4 and the threaded section 303 of the first end cover assembly 3, the outer cylinder body 101, and the piston sleeve 8 form a right oil cavity 107, and the right oil cavity 107 is communicated with the second oil hole 104.

[0068] As Figure 6 shown, in this embodiment, the central shaft 2 is a circular shaft structure, which includes a main body section 201 and a locking section 202 and a limit connection section 203 respectively located at both ends of the main body section 201. The main body section 201 is a cylindrical structure. A locking thread is provided on the outer circumference of the locking section 202. The end of the central shaft 2 is connected with a locking member through the locking thread, and the locking member is arranged at one end of the central shaft 2 close to the second end cover assembly 4; the limit connection section 203 is a radially protruding structure. The locking end of the central shaft 2 passes through the connection bracket 6 and the first end cover assembly 3 from left to right in sequence, and then passes through the swing oil cylinder body 1. The central shaft 2 abuts against the connection bracket 6 through the limit connection section 203, and the locking member realizes the locking connection of the first end cover assembly 3, the elastic member 5, and the connection bracket 6.

[0069] In this embodiment, the locking member is provided with a locking nut 9. The central shaft 2 and each component are locked through the locking nut 9 to realize stable connection; moreover, the end of the central shaft 2 is detachably connected with the connection bracket 6 through the limit connection section 203, which is convenient for disassembly and installation.

[0070] Furthermore, as Figure 1 、 Figure 4As shown, on the inner sides of both ends of the first end cover assembly 3, there are a left cylinder ring chamber 3014 and a right cylinder ring chamber 3041 respectively. The left cylinder ring chamber 3014 is arranged on the inner peripheral side of the left end cover part 301, and the right cylinder ring chamber 3041 is arranged on the inner peripheral side of the end of the end fixing section 304. A support cylinder ring is arranged between the first end cover assembly 3 and the central shaft 2. The support cylinder ring includes a first support cylinder ring 10 and a second support cylinder ring 11. The inner peripheral side of the support cylinder ring is coaxially fitted with the central shaft 2, and the outer peripheral sides of the support cylinder ring are respectively in close connection with the left cylinder ring chamber 3014 and the right cylinder ring chamber 3041.

[0071] Specifically, the first support cylinder ring 10 is arranged inside the left cylinder ring chamber 3014 of the first end cover assembly 3. The outer surface of the first support cylinder ring 10 is coaxially fitted with the inner surface of the left cylinder ring chamber 3014, and the inner surface of the first support cylinder ring 10 is coaxially fitted with the central shaft 2; the second support cylinder ring 11 is arranged inside the right cylinder ring chamber 3041 of the first end cover assembly 3. The outer surface of the second support cylinder ring 11 is fitted with the inner surface of the right cylinder ring chamber 3041, and the inner surface of the second support cylinder ring 11 is coaxially fitted with the central shaft 2. Through the fitting connection between the support cylinder ring and each ring chamber, the central shaft 2 has strong bearing capacity and support force.

[0072] In this embodiment, as Figure 1 、 Figure 3 、 Figure 7 shown, a first connection part is arranged at the end of the first end cover assembly 3, and a second connection part is arranged on the connection bracket 6. The cross-sectional shapes of the first connection part and the second connection part are adapted to the cross-sectional shape of the elastic member 5. The elastic member 5 is connected to the first connection part and the second connection part. The end of the central shaft 2 passes through the central through hole of the elastic member 5 and is connected to the connection bracket 6. And the left and right ends of the elastic member 5 are respectively in contact connection with the first end cover assembly 3 and the connection bracket 6. The end of the central shaft 2 passes through the inner peripheral side of the annular boss 306. The central shaft 2 is coaxially arranged with the central through hole of the elastic member 5 and the center of the annular boss 306. Through the support of the annular boss 306 on the central shaft 2, the bearing capacity of the elastic member 5 is improved.

[0073] Specifically, as Figure 8 shown, the elastic member 5 is an annular plate structure with a central through hole. The central through hole is a circular structure. The cross-sectional shape of the elastic member 5 is a quasi-plum blossom structure composed of five evenly distributed cycloid arcs. By arranging the quasi-plum blossom-shaped elastic member 5 between the first end cover assembly 3 and the connection bracket 6, it has the characteristics of small volume, low-speed transmission, and large torque. And the elastic member 5 is made of MC nylon elastic material, which has elastic deformation and buffer vibration reduction functions. This embodiment not only simplifies the installation method, but also the swing oil cylinder has a high anti-torque ability, so that the load is evenly distributed on the elastic member 5, and it has good durability and recovery force for torque load and can continuously output large torque.

[0074] In this embodiment, asFigure 3 , Figure 7 As shown, the first connecting portion includes a first fixing groove 305. The first fixing groove 305 is adaptively connected to the elastic member 5. Thus, the cross-sectional shape of the first fixing groove 305 is also a plum-blossom-like structure composed of five evenly distributed cycloid arcs. A ring-shaped boss 306 is provided in the middle of the first fixing groove 305. The second connecting portion includes a second fixing groove 601. The second fixing groove 601 is adaptively connected to the elastic member 5. Thus, the cross-sectional shape of the second fixing groove 601 is also a plum-blossom-like structure composed of five evenly distributed cycloid arcs. A connecting through hole 602 adapted to the middle through hole of the elastic member 5 is provided in the second fixing groove 601. The elastic member 5 is coaxially and cooperatively arranged with the central shaft 2, the first end cover assembly 3, and the connecting bracket 6.

[0075] Furthermore, as Figure 1 shown, the thickness of the elastic member 5 is adapted to the sum of the depths of the first fixing groove 305 and the second fixing groove 601. The right part of the elastic member 5 is embedded in the first fixing groove 305 at the end of the first end cover assembly 3, and the left part of the elastic member 5 is embedded in the second fixing groove 601 of the connecting bracket. The central shaft 2 passes through the connecting through hole 602 of the connecting bracket 6 and cooperates with the first support cylinder ring 10 and the second support cylinder ring 11. The end of the central shaft 2 is locked and fixed by a locking nut 9.

[0076] When the swing oil cylinder of this embodiment works, hydraulic oil enters the left oil cavity 106 through the first oil hole 103. The oil pressure in the oil cavity pushes the piston sleeve 8 to move to the right. Since the inner race 7 is fixedly connected to the outer cylinder 101 of the swing oil cylinder barrel 1, the inner race helical teeth on the inner surface of the inner race 7 mesh with the outer helical teeth 801 of the piston sleeve. Therefore, when the piston sleeve 8 moves, due to the meshing action of the helical teeth, the piston sleeve 8 will rotate to the right. The inner helical teeth 802 of the piston sleeve mesh with the inner shaft helical teeth on the outer surface of the threaded section 303 of the first end cover assembly 3. Therefore, when the piston sleeve 8 rotates and moves to the right, it will drive the threaded section 303 to rotate, and then drive the first end cover assembly 3 to rotate. The first end cover assembly 3 is rotationally connected to the outer cylinder 101 through the guide belts inside the cylinder end face sealing groove 3011, the cylinder sealing groove 3012, and the cylinder guide groove 3013. The left end cover portion 301 drives the elastic member 5 to rotate through the first fixing groove 305, and then drives the second fixing groove 601 and the connecting bracket 6 to rotate;

[0077] Similarly, when the swing cylinder works, the hydraulic oil also enters the right oil cavity 107 through the second oil hole 104. When the left end cover part 301 of the first end cover assembly 3 rotates, it drives the connecting bracket 6 to rotate in the opposite direction through the elastic member 5. Due to the repeated impact force of the swing cylinder and the increased external force received during instantaneous collision, through the elastic torque transmission and overload protection of the elastic member 5, the structure has a high anti-torque ability, enabling the load to be evenly distributed on the elastic member 5, having good durability and resilience for torque loads, and being able to continuously output a large torque. Moreover, in this embodiment, the swing cylinder structure does not need to set nuts to connect the end cover assembly and the connecting bracket, thus solving the problems of fracture and failure of the rigid bolts at the end of the traditional swing cylinder end cover assembly, improving the reliability and stability of the device, and making the disassembly and maintenance of the swing cylinder more convenient, reducing the later maintenance cost.

[0078] As Figure 7 , Figure 9 shown, in this embodiment, the connecting bracket 6 is a vertical support plate member, which is provided with a main body member including a second fixing groove and support members vertically arranged at both ends of the main body member.

[0079] Furthermore, the specific structure and shape of the connecting bracket 6 can be adaptively adjusted according to the actual use requirements and the connection requirements of external mating connecting parts, and can be a flat plate structure, a U-shaped plate or other shaped support connection structures, and the connecting bracket 6 can be an integrally formed structure or a split welded support structure.

[0080] In this embodiment, the size of the central through hole of the elastic member 5 is adapted to the outer diameter size of the connecting through hole 602 on the connecting bracket 6 and the outer diameter size of the annular boss 306 of the first end cover assembly 3, and the inner diameter size of the connecting through hole 602 on the connecting bracket 6 and the inner diameter size of the annular boss 306 of the first end cover assembly 3 are adapted to the size of the main body section 201 of the central shaft 2.

[0081] Furthermore, as a preferred embodiment, the cross-sectional shapes of the elastic member 5, the first fixing groove 305, and the second fixing groove 601 are all regular geometric shapes that match each other, and the specific shape settings can be adjusted according to the actual use requirements. The cross-sectional shapes of the elastic member 5, the first fixing groove 305, and the second fixing groove 601 can be multi-sided evenly distributed cycloidal arcs, plum blossoms, regular polygons, crosses, etc.

[0082] Moreover, in this embodiment, the material of the elastic member 5 can be selected from elastic polymer materials such as rubber or plastic.

[0083] The elastic torque transmission swing cylinder provided in this embodiment has a simple structure and is easy to connect and disassemble. The left and right ends of the elastic member 5 are respectively connected to the first end cover assembly 3 and the connecting bracket 6. The central axis 2 passes through the connecting through hole 602 of the connecting bracket 6 and is connected to the first support cylinder ring 10 and the second support cylinder ring 11. The end of the central axis 2 is locked and connected to the first end cover assembly 3, the elastic member 5 and the connecting bracket 6 by the locking nut 9. This not only avoids the problem of bolt breakage and failure caused by the force impact of the end cover assembly and the connecting bracket connected by rigid bolts in the prior art, but also makes the disassembly and maintenance of each component convenient. The elastic torque transmission structure formed by the elastic member 5 has strong anti-torsion shear capability. When the external component transmits torque through the connecting bracket 6, the transmitted torque and impact force are buffered and absorbed by the cycloid arc and the elastic material, so that the load is evenly distributed on the elastic member. The structure can effectively buffer the torsional shear force. The elastic member 5 also realizes structural overload protection, has good durability and resilience for torque load, and improves the reliability and stability of the device.

[0084] Embodiment 2

[0085] The main structure of the swing cylinder provided in this embodiment is the same as that of the first embodiment, and the same parts will not be repeated here. For details, please refer to the description of the first embodiment. This embodiment changes the specific structural setting of the elastic member and the adjacent connecting part in the first embodiment.

[0086] Figure 10 A structural sectional view of an elastic torque transmission swing cylinder is provided for the present embodiment. In the present embodiment, the elastic member 5 is arranged between the first end cover assembly 3 and the connecting bracket 6. The elastic member 5 is contacted and connected with the first end cover assembly 3 and the connecting bracket 6 through the first connecting portion and the second connecting portion respectively, and the elastic member 5 and the first connecting portion on the first end cover assembly 3 are both connected with the second connecting portion of the connecting bracket 6.

[0087] Specifically, Figure 11 As shown, the elastic member 5 is a curved plate structure with an arc, and a connecting slot 501 is provided on the elastic member 5. The connecting slot 501 is a block structure arranged in the middle of the elastic member 5. The cross-sectional shape of the connecting slot 501 is square, and the elastic member 5 is connected to the first connecting part through the connecting slot 501.

[0088] Furthermore, in the present embodiment, the elastic member 5 is a concave open groove structure with an arc, and the elastic member 5 is a symmetrical structure. The material of the elastic member 5 is MC nylon, and other polymer elastic materials such as rubber or plastic can also be selected. Thus, the torque and impact force transmitted by the external component can be buffered and absorbed through the elastic material through the elastic member 5, thereby reducing the impact on internal parts and providing overload protection.

[0089] like Figure 12 , 13As shown in the figure, the first end cover assembly is successively provided with a left end cover part 301, a circular shaft section 302, a threaded section 303 and a terminal fixing section 304 from left to right. A through-hole structure connecting the central shaft 2 is provided in the middle of the left end cover part 301. The first connecting part is arranged on the outer side edge of the left end cover part 301. The first connecting part is a connecting convex block 307 arranged on the side edge of the end of the first end cover assembly 3. The connecting convex block 307 is adaptively clamped with the connecting card slot 501 of the elastic part 5. A plurality of connecting convex blocks 307 are provided, and the number of the connecting convex blocks 307 is matched with the number of the elastic part 5.

[0090] Furthermore, in this embodiment, the cross-sectional shape of the connecting convex block 307 is square, the size of the connecting convex block 307 is matched with the size of the connecting card slot 501 of the elastic part 5. A total of six connecting convex blocks 307 are provided. The plurality of connecting convex blocks 307 are evenly distributed along the outer periphery of the side of the left end cover part 301 and are arranged in a circular array with the through-hole provided inside as the center.

[0091] As Figure 14 shown in the figure, the connecting bracket 6 is arranged at the end of the first end cover assembly 3. A connecting through-hole 602 connecting the central shaft is provided in the middle of the connecting bracket 6. The connecting through-hole 602 is adapted to the through-hole structure and size of the left end cover part 301. The second connecting part is arranged on the side where the connecting bracket 6 is connected to the first end cover assembly 3. The second connecting part includes a connecting groove 603, and the number of the connecting grooves 603 is matched with the number of the connecting convex blocks 307.

[0092] Specifically, in this embodiment, the shape of the connecting groove 603 is adapted to the elastic part 5. The cross-section of the connecting groove 603 is a ring belt structure. The connecting grooves 603 are evenly distributed along the circumferential direction of the connecting bracket 6. Six connecting grooves 603 are provided, and the plurality of connecting grooves 603 are arranged in a circular array with the inner connecting through-hole 602 as the center. The connecting groove 603 is adaptively connected with the elastic part 5 and the connecting convex block 307.

[0093] Furthermore, in this embodiment, the elastic part 5 can be a bent plate or a bent block structure provided with a card slot. The cross-sectional shape of the elastic part 5 can be a regular geometric shape similar to a U shape. The shape of the connecting card slot 501 of the elastic part 5 is matched with the connecting convex block 307 of the first end cover assembly 3. The cross-sectional shape of the connecting card slot 501 of the elastic part 5 can be a square, a trapezoid or a polygon structure.

[0094] Furthermore, the number of the elastic parts 5 can be set to several. The number of the elastic parts 5, the connecting convex blocks 307 and the connecting grooves 603 is matched, and the actual number can be adaptively adjusted according to the use requirements.

[0095] Furthermore, the settings of the component structures not mentioned in this embodiment can be the same as those in the first embodiment, or can be conventionally adapted and adjusted according to the actual use requirements.

[0096] In this embodiment, the first end cover assembly 3 and the connecting bracket 6 are connected in cooperation through a plurality of elastic members 5. The end of the central shaft 2 passes through the inner through holes of the first end cover assembly 3 and the connecting bracket 6 and is engaged with the first support cylinder ring 10 and the second support cylinder ring 11. One end of the central shaft 2 abuts against the connecting bracket 6, and the other end of the central shaft 2 locks and connects the first end cover assembly 3, the elastic member 5 and the connecting bracket 6 through a locking nut 9. The connecting convex block 307 and the connecting groove 603 are arranged on the outer periphery of the central shaft 2. The elastic member 5 is clamped with the connecting convex block 307 of the first end cover assembly 3 through a connecting card slot 501. The connecting body shape of the elastic member 5 and the clamped connecting convex block 307 is adapted to the connecting groove 603 of the connecting bracket 6. The connection of the elastic member 5 and the connecting convex block 307 as a whole is embedded in the connecting groove 603 to achieve a fitting connection.

[0097] The elastic torque transmission swing oil cylinder provided in this embodiment has a simple structure and simple connection disassembly. It not only effectively avoids the problems of bolt fracture and failure caused by the force impact of the end cover assembly and the connecting bracket in the prior art connected by rigid bolts, but also is convenient for disassembling each component and maintaining. The elastic torque transmission structure composed of the elastic member 5 has strong anti-torsion and shear ability. When the external component transmits torque through the connecting bracket, the transmitted torque and impact force pass through the connecting body clamped by the elastic member 5 and the connecting convex block 307 arranged in the connecting groove 603 of the connecting bracket 6. This structure can effectively buffer the torsional shear force, and the elastic material of the elastic member 5 can further buffer and absorb the transmitted torque and impact force, so that the load is evenly distributed on the elastic member 5. The cooperation of multiple structures realizes the buffering of effective torsional shear force. The elastic member 5 has good durability and resilience for torque load, improving the reliability and stability of the device.

[0098] Embodiment Three

[0099] The main structure of the swing oil cylinder provided in this embodiment is the same as that in Embodiment One, and the same parts will not be described in detail here. For details, please refer to the description of Embodiment One. This embodiment changes the specific structures of the elastic member and the adjacent connecting parts in Embodiment One.

[0100] Figure 15 It is a structural sectional view of an elastic torque transmission swing oil cylinder provided in this embodiment. In this embodiment, the two ends of the elastic member 5 are respectively connected to the first end cover assembly 3 and the connecting bracket 6 through a first connecting portion and a second connecting portion. The elastic member 5 is an elastic buffer assembly that can perform radial telescopic movement between the outer periphery of the first end cover assembly 3 and the inner periphery of the connecting bracket 6, and elastic torque transmission and overload protection are carried out through the elastic member 5.

[0101] Specifically, as Figure 16 、 Figure 17As shown in the figure, the first end cover assembly 3 is successively provided with a left end cover part 301, a circular shaft section 302, a threaded section 303, and a terminal fixing section 304 from left to right. A through-hole structure connecting the central axis is provided in the middle of the left end cover part 301. The first connecting part is arranged at the outer end of the left end cover part 301. The first connecting part includes a connecting protrusion 308. The through-hole structure is arranged in the middle of the connecting protrusion 308. The connecting protrusion 308 is an axially extending circular ring plate structure, and the cross-section of the connecting protrusion 308 is a circular ring structure.

[0102] As Figure 18 shown in the figure, the second connecting part is arranged at the side end of the connecting bracket 6. The second connecting part includes a connecting through-hole 602 adapted to be connected with the connecting protrusion 308. The cross-section of the connecting through-hole 602 is a circular structure.

[0103] Specifically, the connecting through-hole 602 is arranged at the center of the side of the connecting bracket 6. The axial width of the connecting through-hole 602 is adapted to the thickness of the connecting protrusion 308. The connecting protrusion 308 is embedded in the connecting through-hole 602. A spring steel ball groove 604 is provided on the side wall of the connecting through-hole 602. The cross-section of the spring steel ball groove 604 is a circular structure.

[0104] As Figure 15 shown in the figure, the elastic member 5 is arranged in the spring steel ball groove 604 of the connecting bracket 6. The spring steel ball groove 604 extends along the radial direction of the connecting through-hole 602. The size of the spring steel ball groove 604 matches the size of the elastic member 5. The outer end of the elastic member 5 abuts against the connecting protrusion 308 of the first end cover assembly 3.

[0105] Specifically, as Figure 15 、 Figure 19 shown in the figure, two spring steel ball grooves 604 are provided on the side wall of the connecting through-hole 602. The two spring steel ball grooves 604 are arranged opposite to each other along the same radial direction of the connecting through-hole 602. The number of the elastic members 5 is matched with the number of the spring steel ball grooves 604. Two elastic members 5 are provided in total. The elastic member 5 includes a spring 502 and a steel ball 503. The spring 502 is arranged at the inner end of the spring steel ball groove 604, and the steel ball 503 is arranged at the outer end. The inner end of the steel ball 503 is in contact connection with the spring 502, and the outer end of the steel ball 503 is in mating contact with the connecting protrusion 308.

[0106] In this embodiment, the steel ball 503 has a spherical structure. The spring 502, as an elastic element, provides the necessary elastic force for the axial movement of the steel ball 503. Under the action of the spring 502, the steel ball 503 can perform axial telescopic movement and can roll by itself. The sizes of the spring 502 and the steel ball 503 are both adapted to the size of the spring steel ball groove 604. Not only is the assembly process of the elastic member 5 simple, but also the connection of the steel ball 503 is reliable. A certain pre-tightening force or frictional force can be generated between the steel ball 503 and the spring steel ball groove 604, which can transmit torque and axial force, making the mechanical system more efficient and stable during operation.

[0107] Furthermore, in this embodiment, the cross-sectional shape of the connecting protrusion 308 can be a regular geometric shape. The thickness of the connecting protrusion 308 is adapted to the depth of the connecting through-hole 602, and the specific set shape and size of the connecting through-hole 602 are adapted to the structure of the connecting protrusion 308. At least one elastic member 5 is provided on the connecting bracket 6, or multiple groups of elastic members 5 can be provided. Each group includes two elastic members 5 arranged oppositely along the same radial direction of the connecting through-hole 602. Spring steel ball grooves 604 are provided on the side wall of the connecting through-hole 602 and are matched with the number of elastic members 5.

[0108] When the swing oil cylinder of this embodiment is working, the supporting force of the elastic member spring 502 is set as the torsional force transmitted by the maximum torque of the swing oil cylinder. Under the elastic supporting force of the spring 502, the connecting protrusion 308 of the first end cover assembly 3 and the connecting bracket 6 are closely matched through the elastic member 5. When the first end cover assembly 3 rotates, the connecting protrusion 308 drives the elastic member 5 including the steel ball 503 and the spring 502 to rotate, and torque is normally transmitted, thereby driving the connecting bracket 6 to rotate and the equipment to operate normally. When the connecting bracket 6 is impacted by the outside world, if the bearing force exceeds the set value of the spring 502, the spring 502 is compressed at this time, the steel ball 503 moves axially and has a gap with the connecting protrusion 308 at the end. Due to factors such as the contact area between the steel ball 503 and the connecting protrusion 308 and the material friction coefficient, the rotation of the first end cover assembly 3 only drives the connecting protrusion 308 and the steel ball 503 to rotate idly at this time. The state of the connecting protrusion 308 and the steel ball 503 at this time is a slipping state, thereby reducing the transmission efficiency and preventing too high torque from being directly transmitted to fragile components, protecting the internal equipment. When overloaded, the impact is resolved through the elastic member 5, effectively protecting against mechanical slipping and overload. Although the first end cover assembly 3 is still rotating at this time, due to slipping, the torque transmitted to the subsequent components is greatly reduced, thereby avoiding components such as the connecting protrusion 308 and the connecting bracket 6 from being overloaded and sheared and damaged due to excessive torque, protecting the normal operation of the equipment, extending the service life of the equipment, and improving the use safety of the equipment.

[0109] Further, as a preferred embodiment of the present utility model, the structures of the end cover assembly and the connecting bracket 6 can be adaptively adjusted according to the actual usage requirements of the swing cylinder. Through holes structures connected to the central shaft 2 are provided in the middle parts of the first end cover assembly 3 and the connecting bracket 6. A matching part for connecting with the elastic member 5 is provided on the side of the end of the first end cover assembly 3. The matching part can be the fixed groove structure provided on the first end cover assembly 3 or the connecting bracket 6 described in the above embodiment, or can also be a matching convex structure or other matching structures. The elastic torque transmission is realized through the connection of the elastic member 5 and the matching part.

[0110] The present utility model provides a swing cylinder for elastic torque transmission. By arranging the elastic member 5 between the first end cover assembly 3 and the connecting bracket 6, the elastic torque transmission between the end of the end cover assembly and the connecting bracket 6 is realized. The elastic torque transmission structure composed of the elastic member 5 has strong anti-torsion and shear capabilities. The swing cylinder of the present utility model has a simple structure and is simple to connect, disassemble and assemble. The left and right ends of the elastic member are respectively connected and matched with the first end cover assembly 3 and the connecting bracket 6. The central shaft 2 passes through the connecting through hole 602 of the connecting bracket 6 and is connected and matched with the first support cylinder ring 10 and the second support cylinder ring 11. And the end of the central shaft 2 locks and connects the first end cover assembly 3, the elastic member 5 and the connecting bracket 6 through a locking nut 9. The swing cylinder structure of the present utility model does not need to set nuts to connect the end cover assembly and the connecting bracket, thus not only avoiding the problems of bolt fracture and failure caused by the force impact of the end cover assembly and the connecting bracket connected by rigid bolts in the prior art, improving the reliability and stability of the device, but also making the disassembly, maintenance and repair of the swing cylinder more convenient, reducing the later maintenance cost.

[0111] When the swing cylinder works, the external assembly transmits torque through the connecting bracket. The transmitted torque and impact force of the external assembly are buffered and absorbed by the elastic member 5, so that the load is evenly distributed on the elastic member 5. The structure has strong anti-torsion and shear capabilities, not only reducing the impact on the equipment and prolonging the service life of the equipment, but also having good durability and resilience for torque load. The elastic member 5 also realizes the structural overload protection, can continuously output large torque, protects the normal operation of the equipment, and improves the use safety and stability of the equipment.

[0112] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0113] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0114] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. An elastic torque transmission swing oil cylinder, comprising a swing oil cylinder barrel and an end cover assembly connected to the swing oil cylinder barrel, wherein a central shaft arranged along the axial direction thereof is provided inside the swing oil cylinder barrel, and it is characterized in that, The end cover assembly includes a first end cover assembly and a second end cover assembly, and the central axis is arranged on the inner peripheral side of the first end cover assembly; It further includes an elastic member and a connection bracket. The elastic member is cooperatively connected with the end cover assembly and the connection bracket. The elastic member can undergo reversible elastic deformation. The connection bracket is connected to the first end cover assembly, and the elastic member is arranged between the first end cover assembly and the connection bracket.

2. An elastic torque transmission oscillating oil cylinder according to claim 1, wherein, The connection bracket is connected to the end of the first end cover assembly. A first connection portion is arranged at the end of the first end cover assembly, and a second connection portion is arranged on the connection bracket. The elastic member is connected to the first connection portion and the second connection portion; The first end of the central axis passes through the swing oil cylinder barrel and the end cover assembly and is connected to the connection bracket. A locking member is connected to the second end of the central axis, and the locking member realizes the locking connection of the first end cover assembly, the elastic member, and the connection bracket.

3. The elastic torque transmission swing oil cylinder according to claim 2, characterized in that, The elastic member is an annular plate structure with a central through hole. The end of the central axis passes through the central through hole of the elastic member and is connected to the connection bracket; the cross-sectional shapes of the first connection portion and the second connection portion are adapted to the cross-sectional shape of the elastic member, and the left and right ends of the elastic member are respectively in contact connection with the first end cover assembly and the connection bracket.

4. The elastic torque transmission oscillating oil cylinder according to claim 3, wherein The first connection portion includes a first fixing groove, and the second connection portion includes a second fixing groove. A connection through hole adapted to the central through hole of the elastic member is arranged in the second fixing groove; the elastic member is coaxially and cooperatively arranged with the central axis, the first end cover assembly, and the connection bracket, and the cross-section of the elastic member is a regular geometric shape.

5. An elastic torque transmission swing oil cylinder according to claim 4, characterized in that, The thickness of the elastic member is adapted to the sum of the depths of the first fixing groove and the second fixing groove, and the cross-sectional shape of the elastic member is a polygonal cycloid arc shape, a plum blossom shape, a regular polygon shape, or a cross shape.

6. An elastic torque transmission oscillating oil cylinder according to claim 2, characterized in that, The elastic member is a curved plate structure with a curvature. A connection card slot is arranged on the elastic member. The first connection portion is a connection convex block arranged on the side of the end of the first end cover assembly. The connection convex block is adapted to be connected to the connection card slot of the elastic member. The second connection portion includes a connection groove. The connection groove is arranged along the circumference of the connection bracket, and the connection groove is adapted to be connected to the elastic member and the connection convex block.

7. An elastic torque transmission oscillating oil cylinder according to claim 6, characterized in that, A plurality of elastic members are arranged, and the number of arranged elastic members matches the number of the connection convex blocks and the connection grooves. The shape and size of the connection convex block are adapted to the connection card slot. The connection convex blocks are circumferentially and uniformly arranged along the side of the end of the first end cover assembly. The connection grooves are circumferentially and uniformly arranged along the circumference of the connection bracket; the elastic member is a concave open groove structure with a curvature, and the elastic member is a symmetric structure.

8. An elastic torque transmission oscillating oil cylinder according to claim 2, characterized in that, The elastic member is an elastic buffer assembly that can perform radial telescopic movement between the outer circumference of the first end cover assembly and the inner circumference of the connection bracket. The first connection portion includes a connection protrusion. The cross-section of the connection protrusion is a regular geometric shape, and a through hole structure is arranged in the middle of the connection protrusion. The second connection portion includes a connection through hole adapted to be connected to the connection protrusion.

9. An elastic torque transmission swing oil cylinder according to claim 8, characterized in that, At least one elastic member is provided, and the elastic member includes a spring and a steel ball. One end of the steel ball is in contact connection with the spring, and the second end of the steel ball is matched with the connecting protrusion; a spring steel ball groove matching the number of the elastic members is provided on the side wall of the connecting through hole, the elastic member is arranged in the spring steel ball groove, and the size of the steel ball is adapted to the size of the spring steel ball groove; the cross section of the connecting protrusion is a circular ring structure, and the cross section of the connecting through hole is a circular structure.

10. An elastic torque transmission swing cylinder according to claim 1, characterized in that, Both the first end cover assembly and the middle part of the connecting bracket are provided with through hole structures connected to the central axis, the central axis is coaxially matched with the end cover assembly and the connecting bracket, and a matching part for connecting with the elastic member is arranged on the side edge of the end of the first end cover assembly. The elastic torque transmission is realized through the connection of the elastic member and the matching part; A left cylinder ring chamber and a right cylinder ring chamber are respectively arranged on the inner sides of both ends of the first end cover assembly. A support cylinder ring is arranged between the first end cover assembly and the central axis. The support cylinder ring includes a first support cylinder ring and a second support cylinder ring. The inner peripheral side of the support cylinder ring is coaxially matched with the central axis, and the outer peripheral sides of the support cylinder ring are respectively in close connection with the left cylinder ring chamber and the right cylinder ring chamber.

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