Quick-release type multifunctional coupler

Abstract

The utility model discloses a quick release type multifunctional coupler, which belongs to the technical field of couplings and comprises a locking mechanism, a coupling mechanism and an axial limiting mechanism, one end of the coupling mechanism is provided with the locking mechanism connected with a driving shaft, and the other end of the coupling mechanism is provided with the axial limiting mechanism connected with a driven shaft. The connecting mechanism comprises an adapter disc, a quick-release locking mechanism is installed at one end of the adapter disc, a sheath is arranged at the other end of the adapter disc, inner oblique teeth are arranged on the inner circumference of the sheath, a flange is connected with a chuck through an elastic body, a kidney-shaped hole is formed in the flange, and a screw penetrates through the kidney-shaped hole and the elastic body to be connected with the chuck. The flange and the chuck are both provided with outer helical teeth, and the inner helical teeth and the outer helical teeth are in matched transmission. The double-locking design is adopted, through the synergistic effect of the conical locking sleeve and the side fixing screw, the locking force of the coupler is remarkably improved, and the loosening risk during high-speed operation is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the coupling technical field, especially a quick detach type multifunctional coupling. BACKGROUND

[0002] The existing couplings generally have the problem of single function. According to whether an elastic element is configured, the coupling can be divided into two categories of rigid coupling and flexible coupling: the flexible coupling compensates for the radial, axial and angular deviation between the two shafts through the deformation of the elastic element, and simultaneously has the functions of buffering impact and absorbing vibration; and the rigid coupling lacks an elastic element, and requires that the two shafts must be strictly centered, and cannot adapt to the working condition with installation deviation. At present, the couplings on the market can only realize the rigid or flexible function, and lack a composite design. In addition, the existing products have obvious defects in maintenance - when the coupling in operation fails and needs to be replaced, the main shaft motor must be disassembled first to disassemble and assemble the coupling, which is time-consuming and laborious, and significantly increases the maintenance difficulty and downtime cost.

[0003] A Chinese patent with publication number CN203130825U discloses an integrated high-rigidity coupling, which comprises a cylindrical body with an axial through hole formed at the center, and T-shaped grooves formed at both ends of the cylindrical body. The T-shaped groove comprises an arc-shaped groove which is perpendicular to the cylindrical body in the axial direction and is connected to the side surface and the through hole, and a straight groove which is arranged in the axial direction and is perpendicular to the center of the arc-shaped groove. A locking mechanism is formed between the bodies on both sides of the straight groove.

[0004] For the above-mentioned disclosed technology, the existing rigid coupling cannot compensate for the installation deviation of the two shaft ends due to the structural characteristics, which may affect the running effect or even accelerate the wear if there is deviation during installation. In addition, the rigid coupling has large rigidity and lacks buffering and vibration absorption functions, which may cause equipment damage or reduce the service life in applications with impact or vibration. The third problem is that the main shaft motor needs to be disassembled when replacing the coupling, which is time-consuming and laborious, and significantly increases the maintenance difficulty and downtime cost. The coupling locking method is single, and can only be locked by one of the side locking or the conical surface locking, which has the problem of low locking force. In addition, the parts of the coupling are not origin-symmetric, and the center of mass of the coupling is not on the center line, which has the problem of unstable operation of the coupling when the coupling is running at high speed. Therefore, it is necessary to provide a quick detach type multifunctional coupling to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a quick detach type multifunctional coupling to solve the above-mentioned problems existing in the prior art.

[0006] Technical solution: A quick-release multifunctional coupling, comprising: a locking mechanism, a coupling mechanism and an axial limiting mechanism, one end of the coupling mechanism is provided with the locking mechanism connected with the driving shaft, the other end of the coupling mechanism is provided with the axial limiting mechanism connected with the driven shaft, the coupling mechanism comprises: an adapter disc, one end of the adapter disc is provided with a quick-release locking mechanism, the other end of the adapter disc is provided with a sheath, the inner circumference of the sheath is provided with an inner bevel gear, a flange is connected with the chuck through an elastic body, the flange is provided with a waist-shaped hole, a screw passes through the waist-shaped hole and the elastic body and is connected with the chuck, the flange and the chuck are both provided with an outer bevel gear, and the inner bevel gear and the outer bevel gear are matched in transmission.

[0007] Further, the locking mechanism comprises: a locking pipe shaft, which is coaxially connected with the adapter disc through a flange or by welding.

[0008] Further, the locking mechanism further comprises: a conical locking sleeve, which is sleeved on the locking pipe shaft, and the locking pipe shaft is provided with an opening.

[0009] Further, the conical locking sleeve is installed on the locking pipe shaft through a first fixing screw, and the conical locking sleeve is provided with a side fixing screw.

[0010] Further, the axial limiting mechanism comprises: a clamp sleeve, the chuck is provided with a limiting ring, the clamp sleeve is rotatably sleeved on the limiting ring through a bearing, the outer of the adapter disc is provided with a plurality of limiting grooves, a stretching block is arranged in one end of the limiting groove, the other end of the stretching block is connected with the clamp sleeve, and the limiting groove is provided with a reset spring for driving the stretching block to reset.

[0011] Further, the limiting groove is a T-shaped groove, the stretching block is a T-shaped block, the stretching block is placed in the limiting groove and slides in the limiting groove, the limiting groove is provided with a guide hole in the movement direction of the stretching block, the stretching block is provided with a guide column, the reset spring is sleeved on the guide column, and the guide column is placed in the guide hole.

[0012] Further, the clamp sleeve comprises: a first clamp ring and a second clamp ring connected with each other through a screw, the first clamp ring is provided with an accommodating groove for accommodating the other end of the stretching block, and the screw passes through the second clamp ring and is connected with the other end of the stretching block.

[0013] Further, the first clamp ring comprises two half rings connected by a screw.

[0014] Further, the waist-shaped hole is arranged in an arc shape on the flange as a whole.

[0015] Further, the tooth-shaped lines of the outer bevel gears on the flange and the chuck are connected with each other.

[0016] Beneficial effects:

[0017] Double locking design: through the cooperation of the conical locking sleeve and the side fixing screw, the locking force of the coupling is significantly improved, and the risk of loosening during high-speed operation is avoided.

[0018] Quick disassembly: loosen the first fixing screw to disassemble the locking mechanism, without disassembling the drive shaft or motor, greatly shortening the maintenance time and cost.

[0019] Rigid and flexible self-adaptation:

[0020] In the starting stage, the elastomer deforms to absorb the impact under high torque, the bevel teeth of the sheath and the flange are separated, and the coupling is in a flexible state; in the steady state, the reset spring pushes the stretching block to reset when the torque decreases, the bevel teeth are engaged, the coupling is converted to a rigid state, and the power is stably transmitted. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the utility model;

[0022] Figure 2 is a structural schematic view of the coupling mechanism of the utility model;

[0023] Figure 3 is a structural schematic view of the locking mechanism of the utility model;

[0024] Figure 4 is a structural schematic view of the axial limiting mechanism of the utility model.

[0025] The reference signs are: locking mechanism 1, coupling mechanism 2, axial limiting mechanism 3, locking pipe shaft 101, conical locking sleeve 102, first fixing screw 103, side fixing screw 104, adapter disc 201, sheath 202, inner bevel tooth 203, flange 204, elastomer 205, chuck 206, outer bevel tooth 207, waist type hole 208, clamp sleeve 301, limiting ring 302, limiting groove 303, stretching block 304, reset spring 305, guide hole 306, guide column 307, first clamp ring 308, second clamp ring 309. DETAILED DESCRIPTION

[0026] In the following description, a large number of specific details are given in order to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0027] Example one: as Figure 1 - Figure 4The utility model discloses a quick-release multifunctional coupling, which comprises a locking mechanism 1, a connecting mechanism 2 and an axial limiting mechanism 3, one end of the connecting mechanism 2 is provided with the locking mechanism 1 connected with a driving shaft, the other end of the connecting mechanism 2 is provided with the axial limiting mechanism 3 connected with a driven shaft, the connecting mechanism 2 comprises an adapter disc 201, one end of the adapter disc 201 is provided with the quick-release locking mechanism 1, the other end of the adapter disc 201 is provided with a sheath 202, an inner bevel gear 203 is arranged on the inner circumference of the sheath 202, a flange 204 is connected with a chuck 206 through an elastic body 205, a waist-shaped hole 208 is arranged on the flange 204, a screw passes through the waist-shaped hole 208 and the elastic body 205 and is connected with the chuck 206, outer bevel gears 207 are arranged on the flange 204 and the chuck 206, and the inner bevel gear 203 is matched with the outer bevel gears 207 for transmission. The locking mechanism 1 comprises a locking pipe shaft 101, which is coaxially connected with the adapter disc 201 through a flange or welding. The locking mechanism 1 further comprises a conical locking sleeve 102, the conical locking sleeve 102 is sleeved on the locking pipe shaft 101, and an opening is arranged on the locking pipe shaft 101. The conical locking sleeve 102 is arranged on the locking pipe shaft 101 through a first fixing screw 103, and side fixing screws 104 are arranged on the conical locking sleeve 102. The axial limiting mechanism 3 comprises a clamp sleeve 301, a limiting ring 302 is arranged on the chuck 206, the clamp sleeve 301 is rotatably sleeved on the limiting ring 302 through a bearing, a plurality of limiting grooves 303 are arranged outside the adapter disc 201, a stretching block 304 is arranged in the limiting groove 303, the other end of the stretching block 304 is connected with the clamp sleeve 301, and a reset spring 305 for driving the stretching block 304 to reset is arranged in the limiting groove 303. The limiting groove 303 is a T-shaped groove, the stretching block 304 is a T-shaped block, the stretching block 304 is arranged in the limiting groove 303 and slides in the limiting groove 303, a guide hole 306 is arranged in the limiting groove 303 along the movement direction of the stretching block 304, a guide column 307 is arranged on the stretching block 304, the reset spring 305 is sleeved on the guide column 307, and the guide column 307 is arranged in the guide hole 306. The clamp sleeve 301 comprises a first clamp ring 308 and a second clamp ring 309 which are connected with each other through a screw, a containing groove for containing the other end of the stretching block 304 is arranged on the first clamp ring 308, and the screw passes through the second clamp ring 309 and is connected with the other end of the stretching block 304. The first clamp ring 308 comprises two half rings which are connected with each other through a screw. The waist-shaped hole 208 is arranged in an arc shape on the flange 204 as a whole. The tooth-shaped lines of the outer bevel gears 207 on the flange 204 and the chuck 206 are connected with each other.

[0028] The locking mechanism 1 is the core component of the coupling and the driving shaft connection. Its core function is to achieve quick locking and disassembly, and to improve the anti-torsion ability and stability of the coupling through a double locking mechanism. The mechanism is composed of the following sub-components: the locking tube shaft 101 is the main shaft body of the locking mechanism, made of high-strength alloy steel, with a hollow structure to reduce overall weight. One end of the locking tube shaft 101 is coaxially connected to the adapter disc 201 through a flange or welding, and the other end is designed with an axial notch, i.e., a slotted structure. The notch allows the locking tube shaft 101 to elastically deform when subjected to radial pressure, thereby generating a radial contraction force to achieve a tight grip on the driving shaft. The number and distribution of notches are optimized to ensure sufficient elastic deformation while avoiding fatigue fracture due to stress concentration. The conical locking sleeve 102 is fitted on the outer surface of the locking tube shaft 101, designed with a conical inner hole that precisely fits the conical outer surface of the locking tube shaft 101. When the notches of the locking tube shaft 101 contract, the tapered surface of the conical locking sleeve 102 further compresses the locking tube shaft 101, thereby enhancing the radial locking force on the driving shaft. The material of the conical locking sleeve 102 is usually alloy steel with surface hardening treatment to improve wear resistance and deformation resistance. In addition, the outer surface of the conical locking sleeve 102 is provided with multiple threaded holes for installing the first fixing screw 103 and the side fixing screw 104. The first fixing screw 103 is evenly distributed along the circumference of the conical locking sleeve 102, and its function is to fix the conical locking sleeve 102 and the locking tube shaft 101 together through threaded connection, preventing relative sliding between the two during operation. The pre-tightening force of the screw needs to be accurately controlled to ensure the stability of the locking mechanism 1 while avoiding excessive locking that may cause the tapered surface to fail. The head of the first fixing screw 103 is designed as a countersunk head to reduce the axial size of the coupling. The side fixing screw 104 is symmetrically distributed along the radial direction of the conical locking sleeve 102, with its threaded end directly abutting the outer surface of the locking tube shaft 101. The function of the side fixing screw 104 is to further increase the radial contraction of the locking tube shaft 101 through lateral pressure, thereby forming a double locking mechanism. This design not only enhances the locking force but also enhances the anti-vibration ability of the coupling during high-speed rotation. The installation position of the side fixing screw 104 needs to be strictly symmetrical to ensure uniform distribution of the locking force and avoid dynamic balance problems caused by eccentricity. The coupling mechanism 2 is the power transmission core of the coupling, responsible for transmitting the torque of the driving shaft to the driven shaft, and achieving dynamic switching between rigid and flexible states through elastic elements and helical tooth engagement structure. The mechanism includes the following key components: the adapter disc 201 is the intermediate carrier of the coupling mechanism 2, one end of which is fixedly connected to the locking tube shaft 101 of the locking mechanism 1 through bolts, and the other end is connected to the sheath 202 through the second fixing screw 202. The adapter disc 201 is made of high-strength forged steel, with an axial through hole inside that cooperates with the sheath 202. The inner wall of the through hole is processed with a guide groove to limit the rotation angle of the sheath 202.The structure design of the adapter plate 201 needs to meet the high torque transmission requirement while ensuring quick disassembly and assembly with the sheath 202. The sheath 202 is a key dynamic component of the coupling mechanism 2, adopting a split structure design, and the inner bevel gear 203 is uniformly distributed on the inner circumference. The tooth surface of the inner bevel gear 203 is carburized to improve wear resistance. The sheath 202 is connected with the adapter plate 201 through the second fixing screw 202, and the outer surface is provided with a plurality of limiting grooves 303 for installing the stretching block 304. The main function of the sheath 202 is to transmit torque by meshing the inner bevel gear 203 with the outer bevel gear 207 of the flange 204 and the chuck 206; in the startup stage of the coupling, the flange 204 and the sheath 202 are separated through axial displacement, realizing flexible state switching. The elastic body 205 is the core element of the flexible function of the coupling, which is made of polyurethane or rubber material and has high elastic modulus and fatigue resistance. The elastic body 205 is installed between the flange 204 and the chuck 206, and is axially fixed through the waist-shaped hole 208 and the positioning pin. When the coupling is in the startup stage, the elastic body 205 absorbs the impact load and vibration energy of the driving shaft through compression deformation, avoiding damage to the equipment caused by rigid transmission. The stiffness of the elastic body 205 needs to be selected according to the actual working condition to ensure that it can effectively buffer the impact and will not affect the power transmission efficiency due to excessive deformation. The waist-shaped hole 208 is designed on the end face of the flange 204 and is arc-shaped, and the long axis direction is consistent with the rotation direction of the coupling. The function of the waist-shaped hole 208 is to provide a micro-motion space for the screws connecting the flange 204 and the chuck 206, allowing the relative angular displacement between the two when the torque changes. This design not only meets the deformation requirement of the elastic body 205, but also reduces the stress concentration problem caused by installation errors. The edge of the waist-shaped hole 208 needs to be chamfered to avoid friction loss between the screw head and the hole wall. The outer bevel gear 207 is machined on the outer circumferential surface of the flange 204 and the chuck 206, and its tooth shape is completely matched with the inner bevel gear 203 of the sheath 202. The tooth top and tooth root of the outer bevel gear 207 adopt a circular arc transition design to reduce stress concentration when meshing. When the coupling is in the rigid state, the outer bevel gear 207 and the inner bevel gear 203 are fully meshed to form a continuous torque transmission path; in the flexible state, the two are separated, and the torque is transmitted through the elastic body 205. The main function of the axial limiting mechanism 3 is to control the axial displacement of the coupling during operation and realize automatic switching of the rigid and flexible states through the spring return mechanism. The mechanism includes the following core components: the jacket 301 is composed of the first clamping ring 308 and the second clamping ring 309, which are connected by bolts to form an integral structure. The inner hole of the jacket 301 is matched with the limiting ring 302 of the chuck 206 through the bearing 304, allowing the jacket 301 to rotate freely on the limiting ring 302. The outer surface of the jacket 301 is provided with a containing groove for fixing one end of the stretching block 304. The material of the jacket 301 is lightweight aluminum alloy, which not only ensures the strength but also reduces the moment of inertia of the coupling.A limiting groove 303 is machined on the outer surface of the sheath 202, which has a T-shaped structure and its length direction is consistent with the axial direction of the coupling. The limiting groove 303 provides a sliding track for the stretching block 304 and limits the movement direction. The bottom of the limiting groove 303 is provided with a guide hole 306 for mounting the guide column 307 and the return spring 305. The machining precision of the limiting groove 303 needs to be controlled within ±0.02 mm to ensure the smoothness of the movement of the stretching block 304. The stretching block 304 has a T-shaped structure, the head part of which is embedded in the limiting groove 303, and the tail part is connected with the clamp sleeve 301 through bolts. The material of the stretching block 304 is quenched steel, and the surface is plated with hard chromium to improve the wear resistance. When the coupling is started, the axial displacement of the sheath 202 is transmitted to the clamp sleeve 301 through the stretching block 304, and the return spring 305 is compressed. When the torque decreases, the return spring 305 pushes the stretching block 304 to reset, and drives the clamp sleeve 301 to move back, so as to realize the re-engagement of the helical teeth. The return spring 305 is a spiral compression spring, and its stiffness coefficient is designed according to the rated torque of the coupling. The spring 305 is sleeved on the guide column 307, one end of which abuts against the end face of the limiting groove 303, and the other end is in contact with the stretching block 304. The return spring 305 provides a reverse thrust, and when the input torque is less than the pre-tightening force of the spring, the stretching block 304 is pushed to reset, so that the coupling returns to the rigid state. The fatigue life of the spring needs to meet the requirement of 10^6 cycles to ensure long-term reliability. The guide column 307 is fixed on the bottom of the stretching block 304, and the diameter thereof is precisely matched with the hole diameter of the guide hole 306 with a gap of ≤0.01 mm. The guide column 307 limits the movement track of the stretching block 304 to prevent the deflection or jamming of the stretching block 304 in the sliding process. The inner wall of the guide hole 306 needs to be polished to reduce the friction resistance.

[0029] Working process

[0030] 1. Start-up stage: flexible state switching

[0031] When the driving shaft is started, the initial torque is transmitted to the adapter disc 201 through the locking mechanism 1. The adapter disc 201 drives the sheath 202 to rotate, and the inner helical teeth 203 of the sheath 202 engage with the outer helical teeth 207 of the chuck 206, so as to drive the chuck 206 to move axially. At this time, the chuck 206 compresses the elastic body 205 through the waist-shaped hole 208, the elastic body 205 deforms to absorb impact energy, and at the same time allows the flange 204 to separate from the helical teeth of the sheath 202.

[0032] The axial displacement of the sheath 202 is transmitted to the clamp sleeve 301 through the stretching block 304, the clamp sleeve 301 slides along the limiting ring 302, and the return spring 305 is compressed. At this time, the torque transmission path of the coupling is: the locking pipe shaft 101→the adapter disc 201→the sheath 202→the elastic body 205→the flange 204→the driven shaft. Due to the buffering effect of the elastic body 205, the coupling is in a flexible state, which can effectively inhibit vibration and impact.

[0033] 2. Stable running phase: rigid state switching

[0034] When the driving shaft enters the stable running phase, the input torque gradually decreases to below the pre-tightening force of the return spring 305. At this time, the return spring 305 releases the stored elastic potential energy, pushes the stretching block 304 to slide reversely along the limiting groove 303, and drives the clamping sleeve 301 and the protective sleeve 202 to move back. The inner helical teeth 203 of the protective sleeve 202 re-engage with the outer helical teeth 207 of the flange 204 to form a rigid connection. The elastic body 205 returns to its original state, and the torque transmission path changes to: locking pipe shaft 101→ adapter disc 201→ protective sleeve 202→ flange 204→ driven shaft. At this time, the coupling transmits power in a rigid state to avoid energy loss.

[0035] 3. Overload protection phase: dynamic response

[0036] If the driving shaft suddenly encounters an overload such as a sudden increase in load, the input torque exceeds the design threshold of the return spring 305, the axial displacement of the protective sleeve 202 increases, causing the elastic body 205 to be further compressed and the helical tooth separation distance to increase. At this time, the coupling automatically switches to a flexible state, absorbing overload energy through the deformation of the elastic body 205 to protect the equipment from damage. When the overload is removed, the return spring 305 again pushes the components to reset and restore the rigid state.

[0037] 4. Maintenance phase: quick disassembly

[0038] When the coupling needs to be replaced or repaired, the operator only needs to loosen the first fixing screw 103 and the side fixing screw 104 of the locking mechanism 1, so that the conical locking sleeve 102 can be separated from the locking pipe shaft 101. Subsequently, the connecting bolts of the adapter disc 201 and the protective sleeve 202 are disassembled, and the entire locking mechanism 1 and the coupling mechanism 2 can be removed from the driving shaft. This process does not require disassembly of the driving motor or the driven equipment, significantly shortening the maintenance time and reducing downtime costs.

[0039] The preferred embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the specific details in the above embodiments, and various equivalent transformations of the technical solutions of the utility model can be made within the technical concept of the utility model, and these equivalent transformations all belong to the protection scope of the utility model.

Claims

1. A quick-release multi-functional coupling comprising: The locking mechanism (1), the coupling mechanism (2) and the axial limiting mechanism (3), one end of the coupling mechanism (2) is provided with the locking mechanism (1) connected with the driving shaft, the other end of the coupling mechanism (2) is provided with the axial limiting mechanism (3) connected with the driven shaft, characterized in that the coupling mechanism (2) comprises: an adapter disc (201), one end of the adapter disc (201) is provided with a quick release locking mechanism (1), the other end of the adapter disc (201) is provided with a sheath (202), the inner circumference of the sheath (202) is provided with an inner helical gear (203), a flange (204) is connected with a chuck (206) through an elastic body (205), the flange (204) is provided with a waist-shaped hole (208), a screw passes through the waist-shaped hole (208) and the elastic body (205) and is connected with the chuck (206), the flange (204) and the chuck (206) are both provided with an outer helical gear (207), and the inner helical gear (203) is matched with the outer helical gear (207) for transmission.

2. The quick-release multi-functional coupling according to claim 1, wherein, The locking mechanism (1) comprises a locking pipe shaft (101), which is coaxially connected with the adapter disc (201) through a flange or by welding.

3. The quick-release multi-functional shaft coupling according to claim 2, wherein, The locking mechanism (1) further comprises a conical locking sleeve (102), which is sleeved on the locking pipe shaft (101), and the locking pipe shaft (101) is provided with an opening.

4. The quick-release multi-functional shaft coupling according to claim 3, wherein, The conical locking sleeve (102) is installed on the locking pipe shaft (101) through a first fixing screw (103), and the conical locking sleeve (102) is provided with a side fixing screw (104).

5. The quick-release multi-functional coupling of claim 1, wherein, The axial limiting mechanism (3) comprises a clamp sleeve (301), the chuck (206) is provided with a limiting ring (302), the clamp sleeve (301) is rotatably sleeved on the limiting ring (302) through a bearing, the adapter disc (201) is provided with a plurality of limiting grooves (303) outside, a stretching block (304) is provided in the limiting groove (303) at one end, the other end of the stretching block (304) is connected with the clamp sleeve (301), and the limiting groove (303) is provided with a reset spring (305) for driving the stretching block (304) to reset.

6. The quick-release multi-functional shaft coupling according to claim 5, wherein, The limiting groove (303) is a T-shaped groove, the stretching block (304) is a T-shaped block, the stretching block (304) is placed in the limiting groove (303) and slides therein, the limiting groove (303) is provided with a guide hole (306) along the movement direction of the stretching block (304), the stretching block (304) is provided with a guide column (307), the reset spring (305) is sleeved on the guide column (307), and the guide column (307) is placed in the guide hole (306).

7. The quick-release multi-functional coupling of claim 5, wherein, The clamp sleeve (301) comprises a first clamp ring (308), the first clamp ring (308) and a second clamp ring (309) are connected with each other through a screw, the first clamp ring (308) is provided with an accommodating groove for accommodating the other end of the stretching block (304), and the screw passes through the second clamp ring (309) and is connected with the other end of the stretching block (304).

8. The quick-release multi-functional coupling of claim 7, wherein, The first clamping ring (308) comprises two half rings connected by screws.

9. The quick-release multi-functional shaft coupling of claim 1, wherein, The waist-shaped hole (208) is arranged in an arc shape on the flange (204) as a whole.

10. The quick-release multi-functional coupling of claim 9, wherein, The tooth-shaped lines of the outer helical teeth (207) on the flange (204) and the chuck (206) are connected to each other.

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