Hydraulic serpentine spring coupling with high bearing capacity

Abstract

The invention relates to the technical field of couplings, and provides a high-bearing-capacity hydraulic serpentine spring coupling which comprises a left shaft sleeve, a right shaft sleeve, a wave spring arranged between tooth grooves of the left shaft sleeve and the right shaft sleeve, and an outer housing covering the outer sides of the left shaft sleeve and the right shaft sleeve. The opposite end faces of the left shaft sleeve and the right shaft sleeve are each provided with a step torsion loading assembly, and the left shaft sleeve and the right shaft sleeve are further sleeved with a distance ring reinforcing assembly. The stepped torsion loading assembly comprises arc-shaped protruding plates integrally formed on the end faces of the left shaft sleeve and the right shaft sleeve, and arc-shaped inserting grooves formed in the end faces of the left shaft sleeve and the right shaft sleeve and located between the adjacent arc-shaped protruding plates. During use, by arranging the step bearing assembly, the spacer ring reinforcing assembly and the shell lock assembly, axial movement of the wave spring is effectively limited, impact stress concentration of the end of the spring is relieved, abrasion of the spring and the shaft sleeve is reduced, and the operation stability of the coupler under the working conditions of high bearing and high-frequency impact is improved.

Description

Technical Field

[0001] This invention relates to the field of coupling technology, and more specifically, to a high-load-bearing hydraulic serpentine spring coupling. Background Technology

[0002] The serpentine spring coupling is a flexible coupling that uses metal elastic elements. Its left and right shaft sleeves are elastically connected by a wave-shaped spring with embedded tooth grooves. It relies on the deformation of the spring to transmit torque and buffer impact, and has the characteristics of strong short-term overload capacity and good vibration reduction effect.

[0003] When the coupling is working normally, the prime mover drives the left shaft sleeve to cause the serpentine spring to deform elastically and transmit the torque to the right shaft sleeve. Under unidirectional load, the spring can effectively buffer the impact caused by starting or sudden load change. However, when the equipment needs to frequently reverse or encounter sudden torque reversal (such as reciprocating crushers, mine hoists, rolling mills, etc.), the spring needs to quickly transition from the force state on one side to the other side, and its working mode is forced to change from "unidirectional buffering" to "bidirectional alternating impact".

[0004] During the bidirectional alternating impact process described above, at the instant of torque reversal, the spring that was originally in close contact with the tooth groove force side quickly rebounds and breaks contact. Subsequently, driven by inertial force and new torque, it impacts the opposite tooth surface at high speed. The instantaneous stress on the bent end of the spring is high. Before the spring impacts the tooth surface, the absorption of impact energy and the limitation of spring displacement mainly rely on the direct contact between the spring and the tooth surface and the rigid blocking of the tooth groove. Repeated impacts cause fatigue cracks to develop prematurely and propagate rapidly at the bent end of the spring, which drastically reduces the actual service life of the spring, further deteriorates the stress state of the spring, and causes the vibration of the transmission system to intensify or even break the spring.

[0005] Therefore, this application proposes a high-load-bearing hydraulic serpentine spring coupling to solve the above problems. Summary of the Invention

[0006] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of this invention is to provide a high load-bearing hydraulic serpentine spring coupling, which solves the problems of stress concentration, fatigue damage and shortened service life of the spring end caused by frequent impact and rigid contact under special working conditions in the existing serpentine spring coupling.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-load-bearing hydraulic serpentine spring coupling, comprising a left bushing, a right bushing, a wave spring disposed between the toothed grooves of the left and right bushings, and an outer casing covering the outside of the left and right bushings; the opposite end faces of the left and right bushings are provided with stepped torsion load assemblies, and the outside of the left and right bushings is also fitted with a spacer ring reinforcement assembly; the stepped torsion load assembly comprises: an arc-shaped protrusion plate integrally formed on the end faces of the left and right bushings, and an arc-shaped slot opened on the end faces of the left and right bushings and located between adjacent arc-shaped protrusion plates, the arc-shaped protrusion plates and arc-shaped slots on the end faces of the left and right bushings are staggered and interlocked with each other, and the arc-shaped sidewalls on both sides of the arc-shaped protrusion plate are provided with stepped bearing edges; when the left and right bushings are interlocked, the stepped bearing edges on both sides of the arc-shaped protrusion plate form an axial and circumferential graded force-bearing fit.

[0008] In a new embodiment, a pressure-reducing buffer assembly is provided on the stepped pressure-bearing edge. The pressure-reducing buffer assembly includes a pressure-reducing surface, an arc-shaped slit, and a stepped side groove. The pressure-reducing surface is a multi-level arc-shaped stepped surface opened on the stepped pressure-bearing edge, and each level of the pressure-reducing surface is provided with an arc-shaped slit extending along the arc length direction. The pressure-reducing surfaces are arranged in a continuous stepped shape, and the curvature of each level of the pressure-reducing surface is consistent with the curvature of the arc-shaped convex plate. The inner walls on both sides of the arc-shaped slot are provided with stepped side grooves, and the stepped side grooves match the shape of the multi-level pressure-reducing surfaces and fit together.

[0009] In a new embodiment, the spacer reinforcement assembly includes: a sleeve ring, which is slidably sleeved on the outside of the left and right bushings; an inner ring groove, which is equidistantly annularly formed on the sleeve ring; a positioning elastic post, which is slidably installed in the inner ring groove; and a blocking ring, which is fixed to the end face of the sleeve ring facing the wave spring, and the blocking ring is located outside the axial end of the wave spring, forming an axial limiting gap with the axial end of the wave spring.

[0010] In a new embodiment, a wave-shaped insulating layer is provided on the inner ring wall of the barrier ring; the wave-shaped insulating layer is made of copper-based powder metallurgy material, and its side facing the wave spring is a wave-shaped curved surface, with the axial end of the wave spring opposite to the wave crest of the wave-shaped insulating layer.

[0011] In a new embodiment, a gradient through hole is provided in the middle of the top wall of the arc-shaped slot, extending to the outer circumferential surfaces of the left and right bushings. A limiting push post is slidably provided in the gradient through hole. The limiting push post is pushed upward by the top surface of the arc-shaped protrusion plate inserted into the arc-shaped slot, and abuts against the positioning elastic post inside the sleeve ring, driving the positioning elastic post to move upward.

[0012] In a new embodiment, a concave ball track is provided in the middle of one side of the positioning elastic column. The concave ball track is a hemispherical concave pit, and the opening of the concave ball track faces the outside of the side of the positioning elastic column.

[0013] In a new embodiment, the outer casing is formed by bolting together two upper and lower half-shells. Limiting ring grooves are formed on both the left and right sides of the inner ring wall of the outer casing. The limiting ring grooves correspond to the positioning elastic pins in a plane perpendicular to the axis. Elastic buffer rings are fitted on the outside of the left and right bushings, and buffer ring grooves are formed on the inner wall of the outer casing.

[0014] In a new embodiment, a housing lock assembly is provided in the limiting ring groove. The housing lock assembly includes a fixed arc block, a return spring, and a round convex locking block. A plurality of fixed arc blocks are fixedly arranged at equal intervals along the circumference in the limiting ring groove, and a plurality of round convex locking blocks are slidably fitted in the limiting ring groove. The end face of the fixed arc block is connected to the corresponding round convex locking block through the return spring. When the positioning elastic post extends upward into the limiting ring groove and abuts against the round convex locking block, the round convex locking block is engaged in the concave ball slide on the side of the positioning elastic post, forming a side engagement.

[0015] Beneficial effects: Compared with the prior art, the advantages of the present invention are as follows: 1. By setting up a stepped bearing component, a spacer ring reinforcement component, and a shell locking component, this application solves the problems of easy wear at the spring end, unstable bushing connection, and ineffective buffering of impact load in existing serpentine spring couplings under high load and high frequency reversing conditions. It realizes the three-in-one locking of the left bushing, right bushing, sleeve ring, and outer shell, effectively restricting the axial movement of the wave spring. At the same time, through the graded force and elastic buffering structure, it reduces the concentration of contact stress, reduces the wear at the joint between the spring and the bushing, and improves the operating stability of the coupling under high load and high frequency impact conditions.

[0016] 2. By setting stepped bearing edges on both sides of the arc-shaped convex plate and opening multiple pressure-reducing surfaces and arc-shaped slits on them, and cooperating with the stepped edge grooves on the inner wall of the arc-shaped slot, the load is distributed to multiple stepped surfaces during insertion, reducing stress concentration. The arc-shaped slit generates a small amount of elastic deformation under pressure, which absorbs impact energy and slows down the impact of sudden load changes on the root of the tooth groove, reduces the peak contact stress, suppresses fretting wear and fatigue cracks, and extends the service life under high load conditions.

[0017] 3. By setting a sleeve ring, a positioning elastic post, and a blocking ring, the positioning elastic post is automatically pushed out and the sleeve ring is locked by the bushing insertion action, so that a preset axial limiting gap is formed between the blocking ring and the end of the wave spring. This gap allows the spring to deform normally while preventing it from excessively moving out of the teeth. The wave-shaped insulating layer on the inner wall of the blocking ring uses its crests to contact the end of the spring, reducing the friction area and storing lubricant in the troughs, further reducing wear and improving the running stability under high-frequency movement conditions.

[0018] 4. By setting a limiting ring groove and a shell locking assembly on the inner wall of the outer casing, when the positioning elastic post enters the limiting ring groove, the round convex block is laterally locked into the concave ball slide on the side of the positioning elastic post under the action of the return spring, forming a side self-locking in the vertical axis. The locking direction is perpendicular to the vibration direction, reducing the possibility of loosening, thereby simplifying the locking process between the outer casing and the sleeve ring, providing a reliable connection under high load and strong vibration conditions, and facilitating on-site disassembly and maintenance. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the disassembled structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the connection structure of the left bushing, right bushing, and wave spring of the present invention.

[0022] Figure 4 This is a schematic diagram of the disassembled structure of the left bushing, right bushing, and outer casing of the present invention.

[0023] Figure 5 This is a schematic diagram of the position structure of the arc-shaped convex plate of the present invention.

[0024] Figure 6 This is a schematic diagram of the pressure relief buffer assembly structure of the present invention.

[0025] Figure 7 For the present invention Figure 6 Enlarged view of the structure at point A.

[0026] Figure 8 This is a schematic diagram of the arc-shaped slot structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the sleeve ring structure of the present invention.

[0028] Figure 10 This is a schematic diagram of the positioning elastic column structure of the present invention.

[0029] Figure 11 This is a schematic diagram of the position and structure of the shell locking assembly of the present invention.

[0030] Figure 12 This is a schematic diagram of the positioning elastic post and the round convex block of the present invention in the state of not being inserted.

[0031] Figure 13 This is a schematic diagram of the wave-shaped spring and the wave-shaped barrier ring of the present invention.

[0032] The attached diagram is labeled as follows: 1. Left bushing; 2. Right bushing; 3. Wave spring; 4. Outer casing; 41. Limiting ring groove; 5. Stepped torsion load assembly; 51. Arc-shaped convex plate; 52. Arc-shaped slot; 521. Gradient through hole; 522. Restricting jacking column; 53. Stepped bearing edge; 6. Spacer ring reinforcement assembly; 61. Sleeve ring; 62. Inner ring groove; 63. Positioning elastic column; 631. Concave ball slide; 64. Barrier ring; 641. Corrugated surface layer; 7. Pressure-reducing buffer assembly; 71. Pressure-reducing surface; 72. Arc-shaped slit; 73. Stepped side groove; 8. Shell lock assembly; 81. Arc fixing block; 82. Return spring; 83. Round convex locking block. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] This application provides a high-load-bearing hydraulic serpentine spring coupling, which solves the problems of stress concentration, fatigue damage, and shortened service life of existing serpentine spring couplings under special working conditions due to frequent impacts and rigid contact at the spring ends. In use, it effectively restricts the axial movement of the wave spring, alleviates the impact stress concentration at the spring ends, reduces the wear between the spring and the bushing, extends the service life of the spring, and improves the operational stability and structural reliability of the coupling under high load and high frequency impact conditions.

[0035] The technical solutions in this application are intended to solve the above-mentioned technical problems, and the overall approach is as follows.

[0036] Example 1, please refer to Figures 1-13 This application provides a high-load-bearing hydraulic serpentine spring coupling, including a left bushing 1, a right bushing 2, a wave spring 3 disposed between the toothed grooves of the left bushing 1 and the right bushing 2, and an outer casing 4 covering the outside of the left bushing 1 and the right bushing 2; both the opposite end faces of the left bushing 1 and the right bushing 2 are provided with stepped torsion load assemblies 5, and the outside of the left bushing 1 and the right bushing 2 is also fitted with spacer ring reinforcement assemblies 6; the stepped torsion load assembly 5 includes: integrally formed on the left bushing 1 and the right bushing 2. The arc-shaped protrusion 51 on the end face of the bushing 2, and the arc-shaped slot 52 opened on the end faces of the left bushing 1 and the right bushing 2 and located between adjacent arc-shaped protrusions 51, the arc-shaped protrusions 51 and the arc-shaped slot 52 on the end faces of the left bushing 1 and the right bushing 2 are staggered and inserted into each other, and the arc-shaped sidewalls on both sides of the arc-shaped protrusion 51 are provided with stepped bearing edges 53; when the left bushing 1 and the right bushing 2 are inserted into each other, the stepped bearing edges 53 on both sides of the arc-shaped protrusion 51 form a graded force-bearing fit in the axial and circumferential directions.

[0037] In a preferred embodiment of this solution, this application sets up a stepped torsion load assembly 5, a spacer ring reinforcement assembly 6, and a housing lock assembly 8. The stepped torsion load assembly 5 realizes graded force distribution and impact buffering between the bushings, the spacer ring reinforcement assembly 6 automatically triggers limit and lock preparation, and the housing lock assembly 8 completes lateral self-locking between the outer shell 4 and the internal structure. The above components work together to achieve a three-in-one locking of the left bushing 1, right bushing 2, sleeve ring 61, and outer shell 4, improving the impact resistance and connection stability of the coupling; on the other hand, it effectively restricts the axial movement of the wave spring 3 and reduces the impact wear between the spring end and related components.

[0038] Specifically, the installation process for this high-load-bearing hydraulic serpentine spring coupling is as follows: First, the left bushing 1 and the right bushing 2 are respectively fitted into the two shafts to be connected, with their end faces facing each other. Then, the two bushings are rotated and pushed so that the arc-shaped protrusion 51 on the end face of the left bushing 1 is inserted into the arc-shaped slot 52 of the right bushing 2. At the same time, the arc-shaped protrusion 51 on the end face of the right bushing 2 is also inserted into the arc-shaped slot 52 of the left bushing 1. Next, a wave spring 3 is fitted between the toothed grooves at the opposite ends of the left bushing 1 and the right bushing 2. As the arc-shaped protrusion 51 is fully embedded, the stepped bearing edge 53 on both sides of it and the stepped side groove 73 on the inner wall of the arc-shaped slot 52 on both sides are pressed together and formed a graded force contact in the axial and circumferential directions. At this time, the multi-stage pressure relief surface 71 opened on the stepped bearing edge 53 is under pressure, and the arc-shaped slit 72 on its surface produces a small amount of elastic deformation, which is used to store energy absorption capacity for subsequent high load conditions. Second, before the left bushing 1 and the right bushing 2 are inserted, the sleeve ring 61 is pre-fitted on the innermost side of the outer wall of a certain bushing. When the left bushing 1 and the right bushing 2 are inserted, the top surface of the arc-shaped protrusion 51 pushes the limiting push post 522 upward. The limiting push post 522 rises in the gradient through hole 521, which locks the sleeve ring 61 axially in the current position on the one hand, and its top abuts against the bottom of the positioning elastic post 63 in the sleeve ring 61, pushing the positioning elastic post 63 to extend upward along the inner ring groove 62, so that its top protrudes out of the outer circumference of the sleeve ring 61 and enters the locking state. Meanwhile, the blocking ring 64 on the end face of the sleeve ring 61 is fixed together with the sleeve ring 61. The blocking ring 64 is located outside the axial end of the wave spring 3 and leaves an axial limiting gap between it and the end of the wave spring 3. The wave-shaped insulating layer 641 on the inner side of the blocking ring 64 is a wave-shaped curved surface facing the wave spring 3, and its crest is opposite to the axial end of the wave spring 3, which is used to provide abutment contact when the end of the spring moves axially. Third, the extended positioning elastic post 63 has a pre-formed hemispherical concave ball slide 631 on the middle of one side, with the opening of the concave ball slide 631 facing outward, waiting for the subsequent locking element to enter. Fourth, place the upper and lower halves of the outer casing 4 outside the left bushing 1 and right bushing 2 according to the predetermined orientation, and then close them. During the closing process, the tip of the extended positioning elastic post 63 enters the limiting ring groove 41 on the inner wall of the outer casing 4. As the outer casing 4 continues to close, the tip of the positioning elastic post 63 begins to contact the round protrusion block 83 in the limiting ring groove 41. After being resisted, the round protrusion block 83 slides along the arc surface of the limiting ring groove 41 to avoid it, so that the positioning elastic post 63 completely enters the limiting ring groove 41. When the positioning elastic post 63 is in place, the round protrusion block 83 resets. Under the action of spring 82, the outer cover 4 rebounds in the opposite direction and is laterally locked into the concave ball slide 631 on the side of the positioning elastic post 63, thus completing the side locking of the outer cover 4 and the sleeve ring 61. As the outer cover 4 closes, it forms a three-in-one locking method for the left shaft sleeve 1 and the right shaft sleeve 2 with the sleeve ring 61 and the outer cover 4. The buffer ring groove on the inner wall of the outer cover 4 presses the elastic buffer rings that are sleeved on the outside of the left shaft sleeve 1 and the right shaft sleeve 2. Finally, lubricating oil is injected through the oil injection port on the outside of the outer cover 4 or lubricating grease has been applied and filled on the outside after the wave spring 3 is installed, thus completing the entire installation.

[0039] As a further embodiment of the present invention, please refer to Figures 6-8 A pressure-reducing buffer assembly 7 is provided on the stepped pressure-bearing edge 53. The pressure-reducing buffer assembly 7 includes a pressure-reducing surface 71, an arc-shaped slit 72, and a stepped side groove 73. The pressure-reducing surface 71 is a multi-level arc-shaped stepped surface opened on the stepped pressure-bearing edge 53. Each level of the pressure-reducing surface 71 is provided with an arc-shaped slit 72 extending along the arc length direction. The pressure-reducing surfaces 71 are arranged in a continuous stepped shape, and the curvature of each level of the pressure-reducing surface 71 is consistent with the curvature of the arc-shaped protrusion 51. The inner walls on both sides of the arc-shaped slot 52 are provided with stepped side grooves 73, and the stepped side grooves 73 are matched with the shape of the multi-level pressure-reducing surfaces 71 and fit together.

[0040] Specifically, by setting up a multi-stage pressure-reducing surface 71, an arc-shaped slit 72, and a stepped side groove 73, when the left bushing 1 and the right bushing 2 are inserted into each other, the multi-stage pressure-reducing surface 71 and the stepped side groove 73 fit together step by step, distributing the axial and circumferential loads to multiple step surfaces, reducing stress concentration on a single contact surface. The arc-shaped slit 72 generates a small amount of elastic deformation when under pressure, giving the multi-stage pressure-reducing surface 71 local flexibility, which can absorb the small gaps and installation impacts generated by the insertion fit. During high-load operation of the coupling, when torque fluctuations or impact loads are transmitted to the stepped bearing edge 53, the arc-shaped slit 72 dissipates some of the impact energy through elastic deformation, mitigating the impact of sudden load changes on the tooth root. Furthermore, the mating structure between the stepped edge groove 73 and the multi-stage pressure-reducing surface 71 restricts the radial displacement of the arc-shaped convex plate 51, preventing lateral slippage under high loads. Thus, the pressure-reducing buffer assembly 7 lowers the peak contact stress of the stepped bearing edge 53, suppressing fretting wear and fatigue cracks, and extending the service life of the coupling under high-load and impact conditions.

[0041] As another embodiment further provided by the present invention, please refer to Figure 3 , Figure 4 and Figure 9 The spacer ring reinforcement assembly 6 includes: a sleeve ring 61, which is slidably sleeved on the outside of the left bushing 1 and the right bushing 2; an inner ring groove 62, which is equidistantly annularly formed on the sleeve ring 61; a positioning elastic post 63, which is slidably installed in the inner ring groove 62; and a blocking ring 64, which is fixed to the end face of the sleeve ring 61 facing the wave spring 3, and the blocking ring 64 is located outside the axial end of the wave spring 3, forming an axial limiting gap with the axial end of the wave spring 3.

[0042] Specifically, by setting a sleeve ring 61, an inner ring groove 62, a positioning elastic post 63, and a blocking ring 64, after the left shaft sleeve 1 and the right shaft sleeve 2 are inserted, the sleeve ring 61 is axially locked, the positioning elastic post 63 extends upward, and the blocking ring 64 moves with the sleeve ring 61 to the outside of the axial end of the wave spring 3, forming a preset axial limiting gap between the blocking ring 64 and the end of the wave spring 3. The aforementioned axial limiting clearance allows the wave spring 3 to undergo necessary axial deformation during normal operation. When the movement of the wave spring 3 exceeds this clearance, its end contacts the blocking ring 64, thereby limiting the spring from further dislodging from the tooth groove. Simultaneously, the protruding positioning elastic post 63 cooperates with the locking structure inside the outer casing 4 to radially fix the sleeve ring 61, ensuring that the blocking ring 64 is always maintained in a position opposite to the end of the wave spring 3. Thus, the spacer ring reinforcement assembly 6 provides axial limiting protection while ensuring the normal working stroke of the wave spring 3, preventing the wave spring 3 from dislodging from the tooth groove under severe impact. Furthermore, through the linkage between the sleeve ring 61 and the positioning elastic post 63, the blocking ring 64 is automatically positioned during installation, reducing manual adjustment.

[0043] Further, please refer to Figure 9 and Figure 13 The inner ring wall of the barrier ring 64 is provided with a wave-shaped barrier layer 641. The wave-shaped barrier layer 641 is made of copper-based powder metallurgy material, and its side facing the wave spring 3 is a wave-shaped curved surface. The axial end of the wave spring 3 is opposite to the wave crest of the wave-shaped barrier layer 641.

[0044] Specifically, when the wave spring 3 undergoes axial movement during operation, its end first contacts the crest of the wave-shaped surface. Due to the height difference between the crest and trough, the end of the wave spring 3 only makes contact at the crest. In addition, the copper-based powder metallurgy material used in the wave-shaped insulating layer 641 has self-lubricating and wear-resistant properties, and can maintain a low coefficient of friction even without external grease. Meanwhile, the trough area can store lubricating oil or grease, continuously supplying oil to the contact surface during the repeated sliding of the end of the wave spring 3, reducing the occurrence of dry friction; when the end of the wave spring 3 is deformed by a large impact, the end may fall over the crest into the trough. The concave surface of the trough forms a containment and guide for the end of the wave spring 3, making the spring return transition more smooth and helping to reduce impact noise. Thus, the wave-shaped insulating layer 641 provides axial limit while reducing friction and wear between the spring end and the blocking ring 64, which to a certain extent helps to extend the service life of the wave spring 3 and improve the running stability of the coupling under high-frequency axial movement conditions.

[0045] Please see Figure 6 and Figure 7 The top wall of the arc-shaped slot 52 has a gradient through hole 521 that extends to the outer circumference of the left bushing 1 and the right bushing 2. A limiting push post 522 is slidably provided in the gradient through hole 521. The limiting push post 522 is pushed upward by the top surface of the arc-shaped protrusion 51 inserted into the arc-shaped slot 52 and abuts against the positioning elastic post 63 in the sleeve ring 61, driving the positioning elastic post 63 to move upward.

[0046] Specifically, by setting gradient through holes 521 and limiting push posts 522, when the arc-shaped protrusion 51 is fully inserted into the arc-shaped slot 52, the top surface of the arc-shaped protrusion 51 pushes the limiting push post 522 upward, and the limiting push post 522 rises along the gradient through holes 521 and abuts against the bottom of the positioning elastic post 63 inside the sleeve ring 61, thereby driving the positioning elastic post 63 to move upward and extend out of the outer circumference of the sleeve ring 61; The above structure uses the bushing insertion action as a power source, which can automatically complete the ejection of the positioning elastic post 63 without additional tools or operation steps. At the same time, the gradient through hole 521 guides the sliding of the limiting push post 522, which helps to ensure the accuracy of the pushing force direction, reduce deflection and jamming, and complete the initial locking and positioning of the sleeve ring 61. This reduces the step of manually operating the positioning elastic post 63, improves the assembly efficiency to a certain extent, and ensures that the ejected positioning elastic post 63 cooperates with the shell locking assembly 8 inside the outer shell 4, providing a position reference for the subsequent side locking of the outer shell 4.

[0047] Further, please refer to Figure 10 and Figure 12 Each side of the positioning elastic post 63 is provided with a concave ball slide 631. The concave ball slide 631 is a hemispherical concave pit, and the opening of the concave ball slide 631 faces the outside of the side of the positioning elastic post 63.

[0048] Specifically, the convex locking block 83 is used as a lateral locking element and is slidably set in the limiting ring groove 41. When the positioning elastic post 63 extends upward into the limiting ring groove 41, its top end first abuts against the convex locking block 83, pushing the convex locking block 83 to compress the return spring 82 and move to one side. After the positioning elastic post 63 is fully inserted, the convex locking block 83 pops out in the opposite direction under the action of the return spring 82 and is locked into the concave ball slide 631 on the side of the positioning elastic post 63, forming a lateral lock. This lateral locking structure automatically locks using the spring return force without additional operation, and the direction of the locking force is perpendicular to the axial movement of the positioning elastic post 63, making it less prone to loosening due to vibration. This improves the connection reliability between the outer cover 4 and the sleeve ring 61. At the same time, the setting of the concave ball slide 631 also facilitates the subsequent disassembly of the outer cover 4. It is not a rigid lock, but a movable lock.

[0049] As another embodiment further provided by the present invention, please refer to Figure 1 , Figure 2 and Figure 4 The outer casing 4 is composed of two upper and lower half-shells connected by bolts. The inner ring wall of the outer casing 4 has limit ring grooves 41 on both the left and right sides. The limit ring grooves 41 and the positioning elastic column 63 are positioned in a plane perpendicular to the axis. The left bushing 1 and the right bushing 2 are fitted with elastic buffer rings on their outer surfaces. The inner wall of the outer casing 4 has buffer ring grooves.

[0050] Specifically, the outer casing 4 is composed of two upper and lower half-shells connected by bolts, which facilitates installation and disassembly. Limiting ring grooves 41 are opened on the left and right sides of the inner ring wall of the outer casing 4, and the limiting ring grooves 41 and the positioning elastic column 63 are aligned in a plane perpendicular to the axis. When the outer casing 4 is closed, the top of the positioning elastic column 63 can accurately slide into the limiting ring groove 41, realizing the radial positioning of the outer casing 4 and the sleeve ring 61, and preventing relative circumferential displacement between the two. At the same time, elastic buffer rings are sleeved on the outside of the left bushing 1 and the right bushing 2, and buffer ring grooves are opened on the inner wall of the outer casing 4. When the outer casing 4 is closed, the elastic buffer rings are pressed into the buffer ring grooves, forming axial elastic compression.

[0051] Further, please refer to Figure 11 and Figure 12 The limiting ring groove 41 is provided with a housing lock assembly 8, which includes a fixed arc block 81, a return spring 82, and a round protrusion block 83. Several fixed arc blocks 81 are fixedly arranged at equal intervals along the circumference in the limiting ring groove 41, and several round protrusion blocks 83 are slidably fitted in the limiting ring groove 41. The end face of the fixed arc block 81 is connected to the corresponding round protrusion block 83 through the return spring 82. When the positioning elastic post 63 extends upward into the limiting ring groove 41 and abuts against the round protrusion block 83, the round protrusion block 83 is engaged in the concave ball slide 631 on the side of the positioning elastic post 63, forming a side engagement.

[0052] In the preferred embodiment of this solution, by setting up a fixed arc block 81, a return spring 82, and a round convex locking block 83, when the positioning elastic column 63 enters the limiting ring groove 41, the round convex locking block 83 is laterally locked into the concave ball slide 631 under the action of the return spring 82, forming a side self-locking in the vertical axis. This locking method is automatically completed by the spring return force, without the need for additional tools, and the locking direction is perpendicular to the axial vibration direction, which helps to reduce the possibility of loosening during operation. Thus, the shell lock assembly 8 simplifies the locking process between the outer shell 4 and the sleeve ring 61, provides a more reliable connection under high load and strong vibration conditions, and facilitates on-site disassembly and maintenance.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-load-bearing hydraulic serpentine spring coupling, comprising a left bushing (1), a right bushing (2), a wave spring (3) disposed between the toothed grooves of the left bushing (1) and the right bushing (2), and an outer casing (4) covering the outside of the left bushing (1) and the right bushing (2); characterized in that: The left bushing (1) and the right bushing (2) are provided with stepped torsion load assembly (5) on their opposite end faces, and the left bushing (1) and the right bushing (2) are also provided with spacer ring reinforcement assembly (6). The stepped torsion load assembly (5) includes: An arc-shaped protrusion (51) integrally formed on the end faces of the left bushing (1) and the right bushing (2), and an arc-shaped slot (52) opened on the end faces of the left bushing (1) and the right bushing (2) and located between adjacent arc-shaped protrusions (51). The arc-shaped protrusions (51) and the arc-shaped slot (52) on the end faces of the left bushing (1) and the right bushing (2) are interlocked and fitted together. The arc-shaped protrusions (51) are provided with stepped bearing edges (53) on both sides of the arc-shaped sidewalls. When the left bushing (1) and the right bushing (2) are inserted into each other, the stepped bearing edges (53) on both sides of the arc-shaped convex plate (51) form a graded force-bearing fit in the axial and circumferential directions.

2. The high-load-bearing hydraulic serpentine spring coupling as described in claim 1, characterized in that, The stepped bearing edge (53) is provided with a pressure-reducing buffer assembly (7), which includes a pressure-reducing surface (71), an arc-shaped slit (72), and a stepped edge groove (73). The pressure-reducing surface (71) is a multi-level arc-shaped step surface opened on the stepped pressure-bearing edge (53), and each level of pressure-reducing surface (71) is provided with an arc-shaped slit (72) extending along the arc length direction. The pressure-reducing surfaces (71) are arranged in a continuous stepped manner, and the curvature of each pressure-reducing surface (71) is consistent with the curvature of the arc-shaped convex plate (51). The inner walls on both sides of the arc-shaped slot (52) are provided with stepped side grooves (73), which are shaped and fit together with the multi-stage pressure relief surface (71).

3. The high-load-bearing hydraulic serpentine spring coupling as described in claim 1, characterized in that, The spacer ring reinforcement assembly (6) includes: A sleeve ring (61) is slidably sleeved on the outside of the left shaft sleeve (1) and the right shaft sleeve (2); The inner annular groove (62) is equidistantly annularly formed on the sleeve ring (61); The positioning elastic column (63) is slidably installed in the inner ring groove (62); The blocking ring (64) is fixed to the end face of the sleeve ring (61) facing the wave spring (3), and the blocking ring (64) is located outside the axial end of the wave spring (3), forming an axial limiting gap with the axial end of the wave spring (3).

4. A high-load-bearing hydraulic serpentine spring coupling as described in claim 3, characterized in that, The inner ring wall of the barrier ring (64) is provided with a wave-shaped barrier layer (641). The wave-shaped insulating layer (641) is made of copper-based powder metallurgy material. The side facing the wave spring (3) is a wave-shaped curved surface, and the axial end of the wave spring (3) is opposite to the crest of the wave-shaped insulating layer (641).

5. A high-load-bearing hydraulic serpentine spring coupling as described in claim 3, characterized in that, The top wall of the arc-shaped slot (52) is provided with a gradient through hole (521) that extends to the outer circumference of the left bushing (1) and the right bushing (2). A limiting push post (522) is slidably provided in the gradient through hole (521). The limiting push column (522) is pushed upward by the top surface of the arc-shaped protrusion (51) inserted into the arc-shaped slot (52), and abuts against the positioning elastic column (63) inside the sleeve ring (61), driving the positioning elastic column (63) to move upward.

6. A high-load-bearing hydraulic serpentine spring coupling as described in claim 3, characterized in that, A concave ball track (631) is provided in the middle of one side of the positioning elastic column (63). The concave ball track (631) is a hemispherical concave pit, and the opening of the concave ball track (631) faces the outside of the side of the positioning elastic column (63).

7. A high-load-bearing hydraulic serpentine spring coupling as described in claim 6, characterized in that, The outer shell (4) is formed by connecting two upper and lower half shells with bolts. The inner ring wall of the outer shell (4) has a limiting ring groove (41) on both the left and right sides. The limiting ring groove (41) and the positioning elastic column (63) are positioned in a plane perpendicular to the axis. The left bushing (1) and the right bushing (2) are fitted with elastic buffer rings on their outer surfaces, and the inner wall of the outer cover (4) is provided with a buffer ring groove.

8. A high-load-bearing hydraulic serpentine spring coupling as described in claim 7, characterized in that, The limiting ring groove (41) is provided with a shell lock assembly (8), which includes an arc fixing block (81), a reset spring (82), and a round convex block (83). The limiting ring groove (41) is provided with a number of fixed arc blocks (81) at equal intervals along the circumference, and a number of round convex blocks (83) are slidably fitted in the limiting ring groove (41). The end face of the arc-fixing block (81) is connected to the corresponding round convex block (83) through a reset spring (82); When the positioning elastic post (63) extends upward into the limiting ring groove (41) and abuts against the round convex block (83), the round convex block (83) is engaged in the concave ball slide (631) on the side of the positioning elastic post (63), forming a side engagement.

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