A drive shaft coupling based on a multi-stage elastic assembly

Abstract

The application relates to the technical field of couplings, in particular to a transmission shaft coupling based on a multistage elastic assembly, which comprises a driving shaft sleeve, a driven shaft sleeve, a first-stage elastic assembly and a second-stage elastic assembly; the first-stage elastic assembly comprises two first-stage shaft sleeve convex teeth and a first-stage elastic body, and the convex teeth on the two first-stage shaft sleeve convex teeth are respectively embedded on the two sides of petal grooves of the first-stage elastic body; the second-stage elastic assembly comprises two second-stage shaft sleeve convex teeth, a second-stage elastic body and two adjusting assemblies, the second-stage elastic body is completely embedded into one of the second-stage shaft sleeve convex teeth, the convex tooth on the other second-stage shaft sleeve convex tooth is partially in contact with petal grooves of the second-stage elastic body, and the two adjusting assemblies are used for adjusting the contact area of the second-stage shaft sleeve convex tooth and the second-stage elastic body; the contact area of the second-stage shaft sleeve convex tooth and the second-stage elastic body is flexibly changed through the adjusting assemblies, so that the power demand under the large-torque working condition is met, power waste under the normal working condition is avoided, and the adaptability is improved.

Description

Technical Field

[0001] This invention relates to the field of coupling technology, and more specifically to a transmission shaft coupling based on multi-stage elastic components. Background Technology

[0002] In industrial transmission systems, drive shaft couplings are key components connecting the output shaft of a rotary drive device to the drive shaft. Their core function is to achieve stable power transmission, while also adapting to vibrations, impacts, and minor shaft misalignments that may occur during transmission, ensuring the continuous and reliable operation of the entire transmission system. Currently, most commercially available drive shaft couplings employ a single-stage elastic structure design, achieving torque transmission and vibration damping through the cooperation of an elastic body and the bushing's convex teeth.

[0003] Traditional couplings, with their single-stage elastic structure, require the elastic body to bear most of the torque force when dealing with large torque fluctuations, making them prone to fatigue damage due to excessive deformation. To avoid overload damage to couplings under high load conditions, couplings with rated torques far exceeding actual requirements are often chosen for low-torque transmission paths. However, the structural design of these high-torque couplings significantly increases their transmission resistance when transmitting small torques, requiring more energy to overcome internal structural losses and resulting in unnecessary power waste. Summary of the Invention

[0004] To address the aforementioned issues, a transmission shaft coupling based on multi-stage elastic components is provided. By adjusting the components, the contact area between the secondary bushing teeth and the secondary elastic body can be flexibly changed, thereby meeting the power requirements under high torque conditions while avoiding power waste under normal conditions and improving adaptability.

[0005] To address the problems of existing technologies, this invention provides a transmission shaft coupling based on a multi-stage elastic component, comprising a driving bushing, a driven bushing, a primary elastic component, and a secondary elastic component. The primary elastic component includes two primary bushing teeth and a primary elastic body disposed between the two primary bushing teeth. The two primary bushing teeth are respectively connected to the driving bushing and the driven bushing, and the teeth on the two primary bushing teeth are respectively embedded on both sides of the petal groove of the primary elastic body. The secondary elastic component includes two secondary bushing teeth, a secondary elastic body disposed between the two secondary bushing teeth, and two adjusting components. The two secondary bushing teeth are coaxially connected to the two primary bushing teeth, the secondary elastic body is completely embedded in one of the secondary bushing teeth, and the teeth on the other secondary bushing tooth partially contact the petal groove of the secondary elastic body. The two adjusting components are used to adjust the contact area between the secondary bushing teeth and the secondary elastic body.

[0006] Preferably, the primary elastic component further includes two sliding connection components, which are respectively connected to two primary bushing teeth. Both the driving bushing and the driven bushing have multiple grooves along their own axis, and the two sliding connection components are respectively slidably disposed in the grooves of the driving bushing and the driven bushing.

[0007] Preferably, the sliding connection assembly includes multiple sliders and multiple locking components; the multiple sliders are respectively disposed in multiple grooves, and the sliders are connected to the primary bushing teeth; the multiple locking components are respectively disposed on the multiple sliders; the grooves are provided with locking holes that cooperate with the locking components for fixing the sliders.

[0008] Preferably, the slider has a horizontal groove parallel to the axis of the drive shaft sleeve and a vertical groove perpendicular to the horizontal groove. The locking component includes a locking block and a pressing block. The locking block is movably disposed in the vertical groove, and an insertion groove is provided in the middle of the locking block. The pressing block is movably disposed in the horizontal groove, and an inclined surface is provided at one end of the pressing block.

[0009] Preferably, the locking component further includes a reset component that provides a continuous force on the block away from the slide.

[0010] Preferably, the sliding connection component further includes a synchronization ring, which is connected to multiple locking components to drive the multiple locking components to operate synchronously.

[0011] Preferably, the adjustment assembly includes a guide assembly and a drive assembly; the guide assembly includes a plurality of guide posts and a fixed seat parallel to the axis of the secondary bushing tooth, one end of the guide post is fixedly connected to the primary bushing tooth, and the other end of the guide post is slidably connected to the fixed seat; the drive assembly is used to drive the secondary bushing tooth to move along the guide post.

[0012] Preferably, the middle part of the guide post is a threaded part, and both ends of the threaded part are sliding connection parts. The two sliding connection parts are slidably connected to the primary bushing protrusion and the fixed seat, respectively. The drive assembly includes multiple threaded sleeves, which are threadedly connected to the threaded parts of multiple guide posts. A push plate is provided at the end of the threaded sleeve facing the secondary bushing protrusion.

[0013] Preferably, the drive assembly further includes a synchronous rotation assembly, which is connected to multiple threaded sleeves and drives the multiple threaded sleeves to move synchronously along their respective guide posts.

[0014] Preferably, the guide assembly further includes a plurality of second return springs, which are respectively sleeved on the sliding connection portion of the plurality of guide posts, and the two ends of the second return springs abut against the primary bushing teeth and the secondary bushing teeth, respectively.

[0015] The advantages of this invention compared to the prior art are:

[0016] 1. This invention comprises a driving bushing, a driven bushing, a primary elastic component, and a secondary elastic component. The driving bushing is fixedly connected to the output shaft of the rotary drive device, and the driven bushing is fixedly connected to the transmission shaft. Together with the petal-groove fitting structure of the primary bushing teeth and the primary elastic component teeth, a complete basic power transmission chain is formed. This ensures that the power of the rotary drive device can be stably transmitted to the transmission shaft, realizing the core transmission function and preventing power transmission interruption. While the primary elastic component transmits power, the secondary bushing teeth and the secondary elastic component partially contact each other, allowing them to transmit auxiliary torque. The adjusting component pushes the secondary bushing teeth closer to the secondary elastic component, increasing the contact area and enabling the secondary elastic component to transmit a larger auxiliary torque. Together with the primary elastic component, they bear the total torque, preventing excessive deformation or fatigue damage to the primary elastic component due to overload. By flexibly changing the contact area between the secondary bushing teeth and the secondary elastic component through the adjusting component, the coupling can adjust its torque transmission capacity according to load changes. This satisfies the power requirements under high torque conditions while avoiding power waste under normal conditions, improving adaptability.

[0017] 2. The present invention provides a sliding connection component. Through the cooperation of the sliding connection component and the slide groove, it is not necessary to disassemble the connection between the driving bushing, the driven bushing and the external equipment, thereby realizing the separation and docking of the primary bushing tooth and the primary elastic body, simplifying the replacement process and reducing maintenance time and labor costs.

[0018] 3. The present invention is provided with a slider and a locking assembly. Through the cooperation of multiple locking assemblies and locking holes, the axial movement of the slider caused by vibration is effectively limited, the axial movement of the primary bushing teeth is prevented, and the torque transmission process is ensured to be stable. Attached Figure Description

[0019] Figure 1 This is a perspective view of a transmission shaft coupling based on multi-stage elastic components according to the present invention.

[0020] Figure 2 This is a three-dimensional sectional view of a transmission shaft coupling based on multi-stage elastic components according to the present invention.

[0021] Figure 3 This is a perspective view of the driving bushing, driven bushing, and primary elastic component in a transmission shaft coupling based on multi-stage elastic components according to the present invention.

[0022] Figure 4 This is a perspective view of the drive bushing, first-stage bushing teeth, slider, lower pressure block, reset component and synchronization ring in a transmission shaft coupling based on multi-stage elastic components according to the present invention.

[0023] Figure 5 This is an exploded view of the slider, locking block, pressing block, and reset assembly in a transmission shaft coupling based on multi-stage elastic components according to the present invention.

[0024] Figure 6 This is a perspective view of the slider, locking component, and synchronization ring in a transmission shaft coupling based on multi-stage elastic components according to the present invention.

[0025] Figure 7 This is a perspective view of a transmission shaft coupling based on multi-stage elastic components according to the present invention, including a first-stage bushing tooth, a second-stage bushing tooth, a second-stage elastic body guide component, and a drive component.

[0026] Figure 8 This is a perspective view of a transmission shaft coupling based on multi-stage elastic components according to the present invention, including a primary bushing tooth, a secondary bushing tooth, a guide component, a threaded sleeve, and a synchronous rotation component.

[0027] Figure 9 This is a perspective view of the primary bushing teeth, secondary bushing teeth, guide post, and fixed seat in a transmission shaft coupling based on multi-stage elastic components according to the present invention.

[0028] Figure 10 This is a perspective view of the secondary bushing teeth, guide post, second return spring, threaded sleeve, and synchronous rotation component in a transmission shaft coupling based on multi-stage elastic components according to the present invention.

[0029] The following components are labeled in the diagram: 1. Driving bushing; 2. Driven bushing; 3. Primary elastic component; 31. Primary bushing tooth; 32. Primary elastic body; 33. Slider; 34. Locking component; 341. Locking block; 3411. Insertion slot; 342. Lowering block; 3421. Inclined surface; 343. Reset component; 3431. Guide rod; 3432. First reset spring; 35. Synchronous ring; 4. Secondary elastic component; 41. Secondary bushing tooth; 42. Secondary elastic body; 43. Guide component; 431. Guide post; 432. Fixed seat; 433. Second reset spring; 44. Drive component; 441. Screw sleeve; 4411. Push plate; 442. Synchronous rotation component; 4421. Gear; 4422. Internal gear ring; 4423. Side baffle. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figures 1 to 10The diagram shows a transmission shaft coupling based on a multi-stage elastic component, comprising a driving bushing 1, a driven bushing 2, a primary elastic component 3, and a secondary elastic component 4. The primary elastic component 3 includes two primary bushing teeth 31 and a primary elastic body 32 disposed between the two primary bushing teeth 31. The two primary bushing teeth 31 are respectively connected to the driving bushing 1 and the driven bushing 2, and the teeth on the two primary bushing teeth 31 are respectively embedded on both sides of the petal groove of the primary elastic body 32. The secondary elastic component 4 includes two secondary bushing teeth 41, a secondary elastic body 42 disposed between the two secondary bushing teeth 41, and two adjusting components. The two secondary bushing teeth 41 are coaxially connected to the two primary bushing teeth 31, and the secondary elastic body 42 is completely embedded in one of the secondary bushing teeth 41. The teeth on the other secondary bushing tooth 41 partially contact the petal groove of the secondary elastic body 42. The two adjusting components are used to adjust the contact area between the secondary bushing teeth 41 and the secondary elastic body 42.

[0032] The driving sleeve 1 is fixedly connected to the output shaft of the rotary drive device, and the driven sleeve 2 is fixedly connected to the drive shaft to be driven. When the rotary drive device is started, its output shaft begins to rotate around its own axis, driving the driving sleeve 1, which is rigidly connected to it, to rotate synchronously. The driving sleeve 1 transmits rotational power to the first-stage sleeve protrusion 31 connected to it. This first-stage sleeve protrusion 31 transmits torque to the first-stage elastic body 32 through the protrusion structure embedded in the petal groove of the first-stage elastic body 32, and further transmits it to the driven sleeve 2 through another first-stage sleeve protrusion 31. Finally, the driven sleeve 2 drives the drive shaft to rotate, realizing the basic power transmission function. While transmitting power, the rotation of the two primary bushing protrusions 31 synchronously drives the rotation of the two secondary bushing protrusions 41 coaxially connected to them. Among them, the secondary bushing protrusion 41 that is fully engaged with the secondary elastic body 42 drives the secondary elastic body 42 to rotate synchronously. Since the protrusion of the other secondary bushing protrusion 41 maintains partial contact with the petal groove of the secondary elastic body 42, during rotation, the secondary elastic body 42 generates an auxiliary torque transmission effect on the secondary bushing protrusion 41 through the contact part. Moreover, this partial contact structure can ensure that even if the primary elastic body 32 undergoes slight deformation or axial misalignment, the secondary bushing protrusion 41 and the secondary elastic body 42 always maintain a contact state. To avoid transmission interruption, the elastic properties of the secondary elastomer 42 can also provide secondary buffering for vibrations and impacts generated during the primary transmission process, further improving transmission stability. When the torque to be transmitted by the coupling increases, the torque force on the primary elastomer 32 increases accordingly, and the elastic deformation between its petal groove and the primary bushing tooth 31 also increases accordingly. At this time, the two adjusting components push the two secondary bushing teeth 41 closer together. The secondary bushing teeth 41, which were originally in partial contact with the petal groove of the secondary elastomer 42, gradually increase the depth of their embedding in the petal groove, and the contact area increases accordingly. The increase in the contact area allows the secondary elastomer 42 to transmit more torque. The large auxiliary torque, together with the primary elastic component 3, bears the increased total torque, preventing the primary elastic body 32 from excessively deforming or fatigued due to bearing too much torque alone. The adjustable contact area allows the torque transmission capacity of the entire coupling to be flexibly adjusted according to actual working conditions. When the torque returns to the normal value, the contact area between the secondary bushing tooth 41 and the secondary elastic body 42 returns to the initial state. By flexibly changing the contact area between the secondary bushing tooth 41 and the secondary elastic body 42 through the adjustment component, the coupling can adjust its torque transmission capacity according to load changes, thereby meeting the power demand under high torque conditions and avoiding power waste under normal conditions, thus improving adaptability.

[0033] Reference Figure 2 and Figure 3As shown: The primary elastic component 3 also includes two sliding connection components. The two sliding connection components are respectively connected to the two primary bushing protrusions 31. Both the active bushing 1 and the driven bushing 2 are provided with multiple sliding grooves along their own axis. The two sliding connection components are respectively slidably disposed in the sliding grooves of the active bushing 1 and the driven bushing 2.

[0034] When the primary elastomer 32 wears, ages, or is damaged due to prolonged exposure to large forces and needs replacement, the sliding connection assembly on the drive sleeve 1 is pushed to move the corresponding primary sleeve protrusion 31, causing it to move away from the driven sleeve 2 along the axis of the drive sleeve 1. Simultaneously, the sliding connection assembly on the driven sleeve 2 is pushed to move the corresponding primary sleeve protrusion 31, causing it to move away from the drive sleeve 1 along the axis of the driven sleeve 2. The groove of the drive sleeve 1 strictly limits the movement path of the slider 33, ensuring that the primary sleeve protrusion 31 only undergoes axial translation and does not exhibit radial wobble. Then, the damaged primary elastomer 32 is removed from between the two primary sleeve protrusions 31, and a new primary elastomer 32 is placed between the two primary sleeve protrusions 31 in a pre-set position. Next, reverse the operation of the two sliding connection components. Push the sliding connection component on the side of the drive bushing 1, so that the corresponding first-stage bushing protrusion 31 moves along the slide groove towards the driven bushing 2. At the same time, push the sliding connection component on the side of the driven bushing 2, so that the corresponding first-stage bushing protrusion 31 moves along the slide groove towards the drive bushing 1. Due to the guiding effect of the slide groove, the two first-stage bushing protrusions 31 can align with the petal groove of the first-stage elastomer 32. Finally, the protrusions are fully embedded in the petal groove, restoring the connection state to the normal transmission state, and completing the replacement of the first-stage elastomer 32. Through the cooperation of the sliding connection component and the slide groove, it is not necessary to disassemble the connection between the drive bushing 1, the driven bushing 2 and the external equipment, thereby realizing the separation and docking of the first-stage bushing protrusion 31 and the first-stage elastomer 32, simplifying the replacement process and reducing maintenance time and labor costs.

[0035] Reference Figure 2 goods Figure 3 As shown: The sliding connection assembly includes multiple sliders 33 and multiple locking components 34; the multiple sliders 33 are slidably disposed in multiple grooves, and the sliders 33 are connected to the primary bushing protrusions 31; the multiple locking components 34 are respectively disposed on the multiple sliders 33; the grooves are provided with locking holes that cooperate with the locking components 34 for fixing the sliders 33.

[0036] When the coupling transmits torque normally, the primary bushing tooth 31 rotates synchronously with the driving bushing 1 and the driven bushing 2. During this process, it will have a tendency to move along its own axis due to transmission vibration. Therefore, multiple sliders 33 and multiple locking components 34 are set. When the coupling is working normally, the locking components 34 are embedded in the locking holes of the slide groove, restricting the sliding freedom of the slider 33 along the slide groove. When the primary elastic body 32 needs to be replaced, the locking components 34 are separated from the locking holes, releasing the restriction on the slider 33, so that the slider 33 can move along the slide groove. Through the cooperation of multiple locking components 34 and locking holes, the axial movement of the slider 33 caused by vibration is effectively restricted, preventing the primary bushing tooth 31 from moving axially and ensuring the stability of the torque transmission process.

[0037] Reference Figure 2 and Figure 5 As shown: The slider 33 has a horizontal groove parallel to the axis of the drive sleeve 1 and a vertical groove perpendicular to the horizontal groove. The locking assembly 34 includes a locking block 341 and a pressing block 342. The locking block 341 is movably disposed in the vertical groove, and an insertion groove 3411 is provided in the middle of the locking block 341. The pressing block 342 is movably disposed in the horizontal groove, and an inclined surface 3421 is provided at one end of the pressing block 342.

[0038] When the lower pressing block 342 has one end with an inclined surface 3421 on one side of the locking block 341, the locking block 341 is completely within the vertical groove, and the slider 33 can slide freely along the groove. When a pushing force is applied to the lower pressing block 342 along the horizontal groove toward the bottom of the groove, the lower pressing block 342 moves toward the locking block 341, and one end of the inclined surface 3421 of the lower pressing block 342 gradually approaches the insertion groove 3411 of the locking block 341. Due to the inclined structure of the inclined surface 3421, when the lower pressing block 342 continues to move toward the bottom of the groove, the inclined surface 3421 and the insertion groove... The inner walls of 3411 are squeezed together, which converts the axial force of the lower pressing block 342 along the transverse groove into a radial force on the locking block 341. Under the push of this radial force, the locking block 341 moves along the vertical groove towards the inner wall of the slide groove until the locking block 341 enters the locking hole. After the lower pressing block 342 is fully inserted into the insertion groove 3411, it forms a limit on the locking block 341. The locking block 341 cannot move upward along the vertical groove, thereby achieving rigid fixation between the slider 33 and the slide groove, and the slider 33 cannot slide along the slide groove.

[0039] Reference Figure 2 and Figure 5 As shown: the locking component 34 also includes a reset component 343, which provides a continuous force on the locking block 341 away from the slide.

[0040] Specifically, the reset assembly 343 includes a guide rod 3431 and a first reset spring 3432. The guide rod 3431 is integrally formed with the locking block 341, and one end of the guide rod 3431 passes through the slider 33. The first spring is sleeved on the guide rod 3431, and the two ends of the first spring abut against the end of the guide rod 3431 and the slider 33, respectively.

[0041] When no external force is applied, the first return spring 3432 is in a naturally extended state (or slightly compressed state). Its thrust is transmitted to the locking block 341 through the guide rod 3431, keeping the locking block 341 always within the vertical groove. When the pressing block 342 moves towards the locking block 341, its inclined surface 3421 contacts the insertion groove 3411 of the locking block 341 and generates a squeezing force. At this time, the direction of the force exerted by the pressing block 342 on the locking block 341 is opposite to the direction of the thrust exerted by the first return spring 3432 on the locking block 341. As the pressing block 342 continues to move, the squeezing force gradually increases. When this force exceeds the thrust of the first return spring 3432, the locking block 341 begins to overcome the spring thrust and move along the vertical groove towards the sliding groove. During the movement of the locking block 341, the guide rod 3431 moves synchronously towards the sliding groove with the locking block 341. The limiting end of the guide rod 3431 gradually approaches the outer wall of the slider 33 and is sleeved on the... The first return spring 3432 on the guide rod 3431 is compressed, and the elastic potential energy of the first return spring 3432 gradually accumulates, and its pushing force on the guide rod 3431 also increases. However, at this time, the squeezing force of the lower pressing block 342 is still greater than the spring pushing force. The locking block 341 continues to move until one end extends into the locking hole of the slide groove. Meanwhile, the first return spring 3432 continues to apply a pushing force away from the slide groove to the locking block 341 through the guide rod 3431, so that the locking block 341 generates a continuous reverse pressure on the lower pressing block 342. At this time, the inner wall of the insertion groove 3411 of the locking block 341 is tightly attached to the side of the lower pressing block 342, and a large static friction force is formed between the two. This static friction force can effectively prevent the lower pressing block 342 from moving away from the bottom of the groove along the transverse groove, thereby preventing the lower pressing block 342 from accidentally coming out of the insertion groove 3411 due to vibration or external force, and further strengthening the locking fit between the locking block 341 and the lower pressing block 342.

[0042] Reference Figure 2 and Figure 6 As shown: The sliding connection component also includes a synchronization ring 35, which is connected to multiple locking components 34 and is used to drive the multiple locking components 34 to move synchronously.

[0043] Because there are many locking components 34, if the fixing of multiple sliders 33 cannot be released simultaneously, it will be difficult to push the primary bushing protrusion 31 to move. Therefore, a synchronizing ring 35 is connected to multiple pressing blocks 342. When it is necessary to fix the position of the slider 33, a force is applied to the synchronizing ring 35 toward the primary bushing protrusion 31. The synchronizing ring 35 synchronously transmits the force to the multiple pressing blocks 342, causing the multiple pressing blocks 342 to move synchronously toward the bottom of their respective transverse grooves. Therefore, the multiple locking blocks 341 are synchronously inserted into their respective locking holes. When the slider 33 is moved, a force is applied to the synchronizing ring 35 away from the primary bushing tooth 31, causing multiple pressing blocks 342 to move synchronously toward the slot of the transverse groove. As a result, multiple pressing blocks 342 are separated from multiple locking blocks 341 synchronously, and multiple locking blocks 341 are separated from their respective locking holes at the same time. The synchronizing ring 35 connects multiple pressing blocks 342 in series as a whole, so that all locking components 34 can be driven to move synchronously in a single operation, thereby avoiding some sliders 33 from being unfixed or ununlocked due to asynchronous operation of a single locking component 34.

[0044] Reference Figure 7 , Figure 8 and Figure 9 As shown: The adjustment assembly includes a guide assembly 43 and a drive assembly 44; the guide assembly 43 includes a plurality of guide posts 431 and a fixed seat 432 parallel to the axis of the secondary bushing tooth 41, one end of the guide post 431 is fixedly connected to the primary bushing tooth 31, and the other end of the guide post 431 is slidably connected to the fixed seat 432; the drive assembly 44 is used to drive the secondary bushing tooth 41 to move along the guide post 431.

[0045] When the coupling needs to transmit greater torque, the drive assembly 44 operates, driving the secondary bushing tooth 41 to move towards the secondary elastic body 42. Multiple guide posts 431 restrict the movement path of the secondary bushing tooth 41, preventing the secondary bushing tooth 41 from rotating during movement. When the contact area between the secondary bushing tooth 41 and the secondary elastic body 42 increases, the coupling can transmit greater torque. When the coupling only needs to transmit a smaller torque, the drive assembly 44 drives the secondary bushing tooth 41 away from the secondary elastic body 42 along the guide posts 431, reducing the contact area between the secondary bushing tooth 41 and the secondary elastic body 42. By adjusting the assembly, the contact area between the secondary bushing tooth 41 and the secondary elastic body 42 can be precisely controlled according to the load requirements, thereby adjusting the torque transmission capacity of the coupling.

[0046] Reference Figure 8 and Figure 9As shown: the middle part of the guide post 431 is a threaded part, and both ends of the threaded part are sliding connection parts. The two sliding connection parts are slidably connected to the primary bushing protrusion 31 and the fixed seat 432 respectively. The drive assembly 44 includes multiple threaded sleeves 441. The multiple threaded sleeves 441 are threadedly connected to the threaded parts of the multiple guide posts 431 respectively. A push plate 4411 is provided at the end of the threaded sleeve 441 facing the secondary bushing protrusion 41.

[0047] When it is necessary to drive the secondary bushing tooth 41 to move toward the secondary elastic body 42, rotate the threaded sleeve 441. Since the guide post 431 is fixed in position and does not rotate, the threaded sleeve 441 will move along the guide post 431 toward the secondary bushing tooth 41. After the push plate 4411 at the end of the threaded sleeve 441 contacts the secondary bushing tooth 41, it pushes the secondary bushing tooth 41 to move. After the position of the secondary bushing tooth 41 is adjusted, without external force rotating the threaded sleeve 441, the static friction between the threaded part of the threaded sleeve 441 and the threaded part of the guide post 431 can prevent the threaded sleeve 441 from moving axially along the guide post 431 or rotating in the opposite direction. Even if the secondary bushing tooth 41 is subjected to the reaction force of the secondary elastic body 42 or transmission vibration, the threaded sleeve 441 will not loosen. The push plate 4411 always maintains the pushing force on the secondary bushing tooth 41, thereby ensuring that the contact area between the secondary bushing tooth 41 and the secondary elastic body 42 is stable, and the coupling continuously and stably transmits torque.

[0048] Reference Figure 8 and Figure 10 As shown: the drive assembly 44 also includes a synchronous rotation assembly 442, which is connected to multiple threaded sleeves 441 and drives the multiple threaded sleeves 441 to move synchronously along their respective guide posts 431.

[0049] Specifically, the synchronous rotation assembly 442 includes a gear 4421, an internal gear ring 4422, and two side baffles 4423. There are multiple gears 4421, and the multiple gears 4421 are respectively connected to multiple threaded sleeves 441. The internal gear ring 4422 meshes with the multiple gears 4421. The two side baffles 4423 are respectively disposed on both sides of the internal gear ring 4422, and both side baffles 4423 abut against both sides of the gear 4421.

[0050] If the effect of individually adjusting the multiple threaded sleeves 441 on the secondary bushing protrusion 41 is not uniform, it may cause uneven force on the secondary bushing protrusion 41. By setting up a synchronous rotation component 442, when it is necessary to drive the secondary bushing protrusion 41 to move toward the secondary elastic body 42, the internal gear ring 4422 is rotated. The internal gear ring 4422 drives multiple gears 4421 to rotate synchronously. The multiple gears 4421 then drive multiple threaded sleeves 441 to rotate. The multiple threaded sleeves 441 move along the guide post 431, and the gears 4421 move synchronously with the threaded sleeves 441. The side baffles 4423 on both sides of the internal gear ring 4422 drive the internal gear ring 4422 and the gears 4421 to move synchronously. The synchronous rotation component 442 achieves synchronous rotation and movement of multiple threaded sleeves 441 through the meshing transmission of the internal gear ring 4422 and multiple gears 4421, so that the thrust on the secondary bushing protrusion 41 is evenly distributed.

[0051] Reference Figure 10 As shown: The guide assembly 43 also includes a plurality of second return springs 433, which are respectively sleeved on the sliding connection parts of the plurality of guide posts 431, and the two ends of the second return springs 433 respectively abut against the primary bushing protrusion 31 and the secondary bushing protrusion 41.

[0052] In the initial state, the second return spring 433 is in a naturally extended state or a slightly pre-compressed state, applying only a small initial thrust to the secondary bushing protrusion 41 to ensure that the secondary bushing protrusion 41 and the push plate 4411 remain in contact. When the load increases and it is necessary to drive the secondary bushing protrusion 41 closer to the secondary elastic body 42 to increase the contact area, the second return spring 433 is gradually compressed with the driving action of the screw sleeve 441. When the load decreases and it is necessary to reduce the contact area between the secondary bushing protrusion 41 and the secondary elastic body 42, the second return spring 433 releases the stored elastic potential energy to assist the secondary bushing protrusion 41 in quickly resetting. By applying force evenly to the secondary bushing protrusion 41 through multiple second return springs 433, the secondary bushing protrusion 41 is prevented from shifting during the resetting process.

[0053] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A transmission shaft coupling based on multi-stage elastic components, characterized in that, It includes a drive bushing (1), a driven bushing (2), a primary elastic component (3), and a secondary elastic component (4); The primary elastic component (3) includes two primary bushing protrusions (31) and a primary elastic body (32) disposed between the two primary bushing protrusions (31). The two primary bushing protrusions (31) are respectively connected to the active bushing (1) and the driven bushing (2). The protrusions on the two primary bushing protrusions (31) are respectively embedded in the petal grooves of the primary elastic body (32). The secondary elastic component (4) includes two secondary bushing protrusions (41), a secondary elastic body (42) disposed between the two secondary bushing protrusions (41), and two adjustment components. The two secondary bushing protrusions (41) are coaxially connected to the two primary bushing protrusions (31), and the secondary elastic body (42) is completely embedded in one of the secondary bushing protrusions (41). The protrusions on the other secondary bushing protrusion (41) are in partial contact with the petal groove of the secondary elastic body (42). The two adjustment components are used to adjust the contact area between the secondary bushing protrusions (41) and the secondary elastic body (42). The adjustment component includes a guide component (43) and a drive component (44); The guide assembly (43) includes a plurality of guide posts (431) and a fixed seat (432) parallel to the axis of the secondary bushing tooth (41). One end of the guide post (431) is fixedly connected to the primary bushing tooth (31), and the other end of the guide post (431) is slidably connected to the fixed seat (432). The drive assembly (44) is used to drive the secondary bushing protrusion (41) to move along the guide post (431). The middle part of the guide post (431) is a threaded part, and both ends of the threaded part are sliding connection parts. The two sliding connection parts are slidably connected to the primary bushing protrusion (31) and the fixed seat (432) respectively. The drive assembly (44) includes multiple threaded sleeves (441). The multiple threaded sleeves (441) are threadedly connected to the threaded parts of the multiple guide posts (431) respectively. A push plate (4411) is provided at the end of the threaded sleeve (441) facing the secondary bushing protrusion (41). The drive assembly (44) also includes a synchronous rotation assembly (442), which is connected to multiple threaded sleeves (441) and drives the multiple threaded sleeves (441) to move synchronously along their respective guide posts (431).

2. The transmission shaft coupling based on multi-stage elastic components according to claim 1, characterized in that, The primary elastic component (3) also includes two sliding connection components. The two sliding connection components are respectively connected to two primary bushing teeth (31). Both the active bushing (1) and the driven bushing (2) are provided with multiple grooves along their own axis. The two sliding connection components are respectively slidably arranged in the grooves of the active bushing (1) and the driven bushing (2).

3. A transmission shaft coupling based on a multi-stage elastic component according to claim 2, characterized in that, The sliding connection assembly includes multiple sliders (33) and multiple locking components (34); Multiple sliders (33) are slidably disposed in multiple grooves, and the sliders (33) are connected to the primary bushing protrusions (31); Multiple locking components (34) are respectively disposed on multiple sliders (33); The slide groove has a locking hole that cooperates with the locking component (34) to fix the slider (33).

4. A transmission shaft coupling based on a multi-stage elastic component according to claim 3, characterized in that, The slider (33) has a horizontal groove parallel to the axis of the active shaft sleeve (1) and a vertical groove perpendicular to the horizontal groove. The locking assembly (34) includes a locking block (341) and a pressing block (342). The card block (341) is movably disposed in the vertical groove, and an insertion slot (3411) is provided in the middle of the card block (341). The pressing block (342) is movably disposed in the transverse groove, and one end of the pressing block (342) is provided with an inclined surface (3421).

5. A transmission shaft coupling based on a multi-stage elastic component according to claim 4, characterized in that, The locking component (34) also includes a reset component (343) that provides a continuous force on the block (341) away from the slide.

6. A transmission shaft coupling based on a multi-stage elastic component according to claim 3, characterized in that, The sliding connection component also includes a synchronization ring (35), which is connected to multiple locking components (34) for driving the multiple locking components (34) to move synchronously.

7. A transmission shaft coupling based on a multi-stage elastic component according to claim 1, characterized in that, The guide assembly (43) also includes a plurality of second return springs (433), which are respectively sleeved on the sliding connection parts of the plurality of guide posts (431), and the two ends of the second return springs (433) respectively abut against the primary bushing protrusion (31) and the secondary bushing protrusion (41).

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