Coupling with protective sleeve structure

Abstract

The invention relates to the technical field of couplings, in particular to a coupling with a protective sleeve structure. The device sequentially comprises an input sleeve rod, an adjusting sleeve rod and an output sleeve rod, the two ends of the adjusting sleeve rod are provided with meshing grooves in the radial direction, the two sets of meshing grooves are vertically arranged, the ends, facing the adjusting sleeve rod, of the input sleeve rod and the output sleeve rod are detachably provided with pedestals, and the opposite ends of the two pedestals are provided with meshing teeth embedded into the meshing grooves. Tooth-shaped notches are formed in the contact faces of the meshing grooves and the meshing teeth, the two pedestals are jointly sleeved with a protective sleeve, elastic shaft seals are arranged between the two ends of the protective sleeve and the contact faces of the two pedestals, and the protective sleeve is filled with lubricating agents. The meshing grooves are matched with the meshing teeth, installation errors between the input sleeve rod and the output sleeve rod or dislocation deviation of the axis in the operation process can be compensated, and therefore the dislocation allowance of an adaptive power transmission center line is balanced, the probability that a coupler suddenly breaks and fails due to bearing additional stress is reduced, and the transmission stability is guaranteed. And the probability of non-planned shutdown is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of couplings, in particular to a coupling with a protective sleeve structure. BACKGROUND

[0002] In industrial applications, especially in the scenes of motor-driven pumps, fans, compressors, etc., couplings play an indispensable role. Couplings are key basic components in mechanical transmission systems, and their main function is to connect two shafts or a shaft and a rotating part through rigid or flexible structures, directly or indirectly transmitting power from the driving shaft to the driven shaft, thereby realizing continuous transmission of power.

[0003] However, most conventional couplings (such as rigid flange couplings, elastic plum blossom couplings, diaphragm couplings, etc.) are designed to continuously transmit torque. When the transmission system encounters sudden overload (such as equipment jamming, impact load), excessive torque will be directly transmitted to the driving side (such as the motor) or the driven side equipment through the coupling. This can easily cause permanent damage to the structure of the coupling (such as the elastic body, diaphragm), and even cause more serious equipment accidents such as motor winding burnout, speed reducer gear tooth impact, transmission shaft torsional fracture, etc. Although there are some safety couplings with overload protection (such as friction type, steel ball type, shear pin type), they often have complex structure, high cost, and the protection threshold is not easy to accurately set or requires manual replacement of parts (such as shear pins) to reset, which is inconvenient to maintain and affects production.

[0004] And the coupling has high requirements for the alignment of the two connected shafts (radial, axial, angular deviation). Although flexible couplings (such as plum blossom, diaphragm, bellows) are designed to compensate for certain deviations, their compensation ability is limited. In actual operation, due to factors such as foundation settlement, equipment vibration, thermal expansion, bearing wear, etc., the center lines of the two connected shafts often experience dynamic or static relative deviation (especially radial deviation). When the deviation exceeds the rated compensation range of the coupling, a large additional stress will be generated inside the coupling, which not only leads to abnormal vibration, noise and efficiency decline, but also more seriously accelerates the fatigue damage of the coupling elements, and eventually may cause the coupling to suddenly break down, resulting in unplanned downtime and safety risks.

[0005] Therefore, the present application provides a coupling with a protective sleeve structure to compensate for radial deviation in a cross-shaped structure, and to relieve the rigidity generated inside the coupling due to shaft center deviation. SUMMARY

[0006] The purpose of the present application is to solve the problems existing in the prior art and provide a coupling with a protective sleeve structure.

[0007] In order to achieve the above purpose, the present application adopts the following technical solutions: A coupling with a protective sleeve structure, comprising an input sleeve rod, an adjusting sleeve rod and an output sleeve rod in sequence, the adjusting sleeve rod is provided with a clamping groove at both ends in the radial direction, and two groups of clamping grooves are arranged vertically, the input sleeve rod and the output sleeve rod are detachably mounted with a pedestal at one end facing the adjusting sleeve rod, the two pedestals are provided with a clamping tooth embedded in the clamping groove at the opposite end, the contact surface of the clamping groove and the clamping tooth is provided with a tooth-shaped gap, the two pedestals are jointly sleeved with a protective sleeve, the contact surface between the two ends of the protective sleeve and the two pedestals is provided with an elastic shaft seal, the protective sleeve is filled with a lubricant, and the protective sleeve is provided with an oil valve.

[0008] Preferably, the outer edge surface of the adjusting sleeve rod is annularly arranged with multiple groups of bent spoons, the adjusting sleeve rod is provided with an oil cavity, the oil cavity is connected with an oil channel one corresponding to the bent spoon, the oil channel one passes through the bent spoon and penetrates out from the inside of the spoon end of the bent spoon, and the oil cavity is also symmetrically connected with a plurality of oil channels two and three, and the ports of the oil channels two and three respectively penetrate out from the tooth-shaped gap of the clamping groove on both sides.

[0009] Preferably, the sum of the depths of the clamping grooves on both sides of the adjusting sleeve rod is greater than the sum of the thicknesses of the clamping teeth on the two pedestals.

[0010] Preferably, the bottom end of the clamping groove and the root of the clamping tooth are both provided with an inner groove.

[0011] Preferably, a transition sleeve rod is further provided, and the two groups of pedestals are arranged at the opposite ends of the input sleeve rod and the transition sleeve rod; the transition sleeve rod is provided with a flange assembly one on the side facing the output sleeve rod, the flange assembly one is inserted with a fixed tooth sleeve on the side facing the output sleeve rod, the output sleeve rod is axially slidably mounted with a mounting sleeve, a top spring is arranged between the mounting sleeve and the output sleeve rod, the mounting sleeve is provided with a flange assembly two, the flange assembly two is inserted with a movable tooth sleeve on the side facing the input sleeve rod, and the fixed tooth sleeve and the movable tooth sleeve are mutually clamped.

[0012] Preferably, the outer surface of the output sleeve rod is provided with an external thread at the non-moving part of the mounting sleeve, a self-locking nut is screwed on the external thread, a stop ring is abutted on the side of the top spring facing the self-locking nut, and one end of the spring is abutted on the mounting sleeve and the other end is abutted in the stop ring.

[0013] Preferably, the fixed tooth sleeve and the movable tooth sleeve are both provided with multiple insertion columns on the opposite sides.

[0014] Preferably, the fixed tooth sleeve and the movable tooth sleeve are both divided into two groups.

[0015] Preferably, the output sleeve rod and the transition sleeve rod are inserted and matched.

[0016] Preferably, the output sleeve rod is divided into a handle rod and a handle sleeve, the handle rod and the handle sleeve are detachably connected, the handle rod is a stepped shaft with a gradually reduced shaft diameter from the side facing the input sleeve rod to the side away from the input sleeve rod, and the handle rod is provided with a limiting boss on the side facing the input sleeve rod.

[0017] Compared with the prior art, the coupling with the protective sleeve structure has the following beneficial effects: 1、The input sleeve rod, the adjusting sleeve rod, the transition sleeve rod and the output sleeve rod are sequentially assembled.

[0018] 2、The protective sleeve outside the adjusting sleeve rod is provided with a lubricant, which can adjust the friction between the teeth and the engagement groove to reduce the friction fatigue damage.

[0019] 3、The fixed tooth sleeve and the movable tooth sleeve are tightly engaged by the top spring, when the output load reaches a certain degree, the top spring retracts, the contact surface between the fixed tooth sleeve and the movable tooth sleeve gradually decreases, and finally the fixed tooth sleeve and the movable tooth sleeve are misaligned and slide, so that the transmission fails, and the power is no longer stably and continuously transmitted.

[0020] 4、The initial compression state of the top spring can be adjusted by the self-locking nut, and the pre-tension range of the top spring is adjusted to adapt to more load conditions.

[0021] Other advantages, objects and features of the present application will be set forth in part in the following specification taken in conjunction with the accompanying drawings; and in part will become apparent to those skilled in the art upon examination of the following specification and drawings; or can be learned from practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a left axial perspective view of the present application.

[0023] Figure 2 It is a left axial perspective view of the present application. Figure 1 It is a perspective view after removing two bearing seats.

[0024] Figure 3 It is a right axial perspective view of the present application.

[0025] Figure 4 It is a right axial perspective view of the present application. Figure 3Perspective view of the device with the two bearing seats removed.

[0026] Figure 5 The device of the invention Figure 3 Perspective view of the device with the top spring and the retaining ring removed.

[0027] Figure 6 The device of the invention Figure 3 Top view of the device.

[0028] Figure 7 The device of the invention Figure 6 Sectional view of the device at A-A.

[0029] Figure 8 The device of the invention Figure 7 Assembly sectional view of the device at the protective sleeve.

[0030] Figure 9 The device of the invention Figure 7 Sectional view of the device with the two sets of mouth guards occluded.

[0031] Figure 10 The device of the invention Figure 6 Partial view of the device at B-B.

[0032] Figure 11 Assembly and exploded view of the protective sleeve of the device.

[0033] Figure 12 Occlusion of the occlusion grooves on both sides of the adjustment sleeve rod with the bite teeth of the device and exploded view.

[0034] Figure 13 Occlusion and separation of the two sets of mouth guards of the device.

[0035] Figure 14 Occlusion of the input sleeve rod with the end of the transition sleeve rod of the device.

[0036] Figure 15 Structural display of the two sets of mouth guards of the device.

[0037] Figure 16 Flange assembly on the transition sleeve rod of the device.

[0038] Figure 17 Assembly and exploded view of the output sleeve rod of the device.

[0039] Figure 18 Occlusion of the input sleeve rod, the adjustment sleeve rod and the output sleeve rod of the device in Example 1.

[0040] Figure 19 Occlusion of the two oil channels of the adjustment sleeve rod of the device.

[0041] In the figure: 1. Input sleeve rod; 2. Adjustment sleeve rod; 3. Transition sleeve rod; 4. Output sleeve rod; 5. Protective sleeve; 6. Shaft seal; 7. Biting teeth; 8. Engaging groove; 9. Oil channel 1; 10. Oil channel 2; 11. Bent spoon; 12. Flange assembly 1; 13. Flange assembly 2; 14. Fixed socket; 15. Movable socket; 16. Mounting sleeve; 17. Top spring; 18. Retaining ring; 19. Self-locking nut; 20. Insert rod; 21. Insert column; 22. Notch; 23. Bearing seat 1; 24. Bearing seat 2; 401. Handle rod; 402. Spline; 403. External thread; 404. Rectangular shaft; 405. Handle sleeve. DETAILED DESCRIPTION

[0042] The following is a combination of the embodiments of the present invention Figures 1-19 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] In Example 1, to address the problem of dynamic or static relative radial offset between the centerlines of the two connected shafts during actual operation, often caused by factors such as foundation settlement, equipment vibration, thermal expansion, and bearing wear, which affects transmission stability, this embodiment provides a coupling with a protective sleeve structure. From left to right, it includes an input sleeve rod 1, an adjustment sleeve rod 2, and an output sleeve rod 4. The input sleeve rod 1, the adjustment sleeve rod 2, and the output sleeve rod 4 are coaxially arranged during initial assembly.

[0044] Refer to the attached Figure 2 , Attachment Figure 7 As shown, the input sleeve 1 is cylindrical as a whole, with a connecting hole on the left side, which is a structure for docking with shaft parts such as motors and driving shafts that input power; the connecting hole has a built-in keyway, which is connected by a key to realize the transmission input of power.

[0045] Refer to the attached Figure 4 , Attachment Figure 7 As shown, the right end of the output sleeve rod 4 is also provided with a connection hole and a built-in keyway, and the output transmission of power is achieved through key connection.

[0046] Refer to the attached Figure 12 As shown, both ends of the adjustment sleeve 2 are provided with a bite groove 8, the bite groove 8 is arranged along the radial direction of the adjustment sleeve 2, and the two bite grooves 8 at both ends of the adjustment sleeve 2 are perpendicular to the axis to form a cross connector structure.

[0047] Refer to the attached Figure 14 As shown, the input sleeve rod 1 and the output sleeve rod 4 are both detachably mounted with a pedestal (attached) on one end facing the adjustment sleeve rod 2. Figure 14 The figure on the right side shows the assembly base of the transition sleeve 3. Since this embodiment only shows the buffer structure for the coupling offset, this embodiment does not involve the transition sleeve 3.Figure 18 The middle part shows the assembly of the input sleeve rod 1, the adjusting sleeve rod 2 and the output sleeve rod 4). The two bases are provided with the tooth 7 in the form of a rectangular strip structure at opposite ends. When assembled, the tooth 7 is embedded in the tooth groove 8.

[0048] According to the above technical scheme: In use, the input sleeve rod 1 is connected with the power input shaft, the output sleeve rod 4 is connected with the power receiving shaft, and the adjusting sleeve rod 2 is located between the input sleeve rod 1 and the output sleeve rod 4, and is suspended between the input sleeve rod 1 and the output sleeve rod 4 through the cooperation of the tooth 7 and the tooth groove 8.

[0049] Through the cooperation of the tooth groove 8 on the adjusting sleeve rod 2 and the tooth 7 on both sides, a cross connecting piece is formed, the tooth 7 slides in the tooth groove 8, and the installation error between the input sleeve rod 1 and the output sleeve rod 4 or the positional deviation of the shaft center during operation can be compensated, so as to balance the positional deviation of the power transmission center line, eliminate part of the additional stress generated in the shaft coupling due to the positional deviation of the shaft center, reduce the fatigue damage of the shaft coupling element, reduce the probability of sudden fracture failure of the shaft coupling due to the bearing of additional stress, ensure the stability of transmission, reduce the probability of unplanned shutdown, and reduce the safety risk.

[0050] In the further embodiment of the present scheme, the tooth 7 and the tooth groove 8 bear static friction and sliding friction, especially when there is a shaft center deviation, the sliding friction is particularly obvious, and the friction between the contact surfaces of the tooth 7 and the tooth groove 8 will become more serious. Therefore, the present scheme is provided with the tooth-shaped notch 22 on the contact surface of the tooth groove 8 and the tooth 7, which reduces the contact surface and provides a space for the expansion deformation of the tooth groove 8 under pressure. In addition, the two bases are commonly provided with the protective sleeve 5, the protective sleeve 5 is detachably provided with the end cap at both ends (the end cap is shown as being fastened by bolts in the drawing), and the end cap is separated at the bases on both sides. The two end caps are provided with the annular inner groove at opposite sides, the shaft seal 6 is arranged in the inner groove, and the elastic seal between the protective sleeve 5 and the base is realized through the shaft seal 6 on both sides. The elastic shaft seal 6 is arranged between the contact surfaces of the two ends of the protective sleeve 5 and the two bases, the protective sleeve 5 is filled with lubricant, the lubricant is filled to prevent the internal pressure from being too large and being more prone to leakage during operation, and the oil valve is arranged on the protective sleeve 5 to add or extract the lubricant.

[0051] The shaft seal 6 is selected as a lip seal ring, which is embedded with a ring-shaped spring hoop. The lip of the lip seal ring is tightly attached to the shaft surface of the pedestal with an interference, and the spring hoop further pressurizes to form a contact seal. When rotating, an extremely thin oil film is formed between the lip and the shaft to achieve a certain degree of dynamic sealing, allowing a small amount of lubricant to penetrate, but preventing a large amount of leakage. Preferably, in order to improve the dynamic eccentricity resistance, the lip of the lip seal ring is widened to disperse the contact pressure and reduce local wear. At the same time, the back of the lip seal ring is supported by an O-ring to compensate for installation eccentricity or running misalignment and absorb vibrations. The lip seal ring can also be used with a wedge seal to achieve better eccentricity resistance.

[0052] In this scheme, the input sleeve rod 1, the adjusting sleeve rod 2, and the output sleeve rod 4 rotate at the same speed, so the protective sleeve 5 will follow the input sleeve rod 1 and the output sleeve rod 4 to rotate synchronously, and the probability of axial misalignment rotation is small, which means that the rotation friction of the shaft seal 6 is small. The purpose of the elastic shaft seal 6 is to resist the eccentric displacement of the shaft center. However, the elastic shaft seal 6 has limited eccentricity resistance, and when it reaches the limit, fails, or problems are found, it needs to be repaired in time.

[0053] According to the above technical scheme: In use, the adjusting sleeve rod 2 rotates synchronously with the input sleeve rod 1. At this time, the lower side of the adjusting sleeve rod 2 is always immersed in the lubricant. As the rotating operation continues, the contact surface between the teeth 7 and the engagement groove 8 is constantly filled with lubricant to lubricate the friction between the teeth 7 and the engagement groove 8, thereby reducing friction fatigue damage. Moreover, due to the design of the tooth-shaped notch 22 on the contact surface of the engagement groove 8, the lubricant can more easily penetrate between the contact surface of the teeth 7 and the engagement groove 8, thereby improving the lubrication effect.

[0054] In order to make the lubricant better penetrate the contact surface and further improve the lubrication effect, with reference to the accompanying Figure 10 As shown in the accompanying drawings, the outer edge surface of the adjusting sleeve rod 2 is annularly arrayed with multiple groups of bent spoons 11. The bending direction of the bent spoons 11 is towards the rotating direction, so that the adjusting sleeve rod 2 can gather lubricant through the bent spoons 11 when rotating. With reference to the accompanying Figure 19 As shown in the accompanying drawings, the adjusting sleeve rod 2 is internally provided with an oil cavity as a temporary storage space for gathering lubricant. With reference to the accompanying Figure 8 As shown in the accompanying drawings, the oil cavity is connected with oil channels I 9 corresponding to the bent spoons 11. The oil channels I 9 pass through the bent spoons 11 and exit from the inner side of the spoon end of the bent spoons 11. The oil cavity is also symmetrically connected with a plurality of oil channels II 10 and oil channels III. The ports of the oil channels II 10 and the oil channels III respectively exit from the tooth-shaped notches 22 of the two engagement grooves 8.

[0055] According to the above technical scheme: When the adjusting sleeve rod 2 rotates synchronously with the input sleeve rod 1, the spoon 11 rotates to the lower side and is immersed in the lubricant, thereby scooping up the lubricant, part of which enters the oil cavity through the oil channel 1, and part of which enters the oil channel 2 and the oil channel 3 under the centrifugal action, and finally leaks out from the tooth-shaped openings 22 of the two-sided clamping grooves 8, thereby improving the wetting effect of the lubricant on the contact surface when a small amount of lubricant is added to the protective sleeve 5.

[0056] In the embodiment, the sum of the depths of the two-sided clamping grooves 8 of the adjusting sleeve rod 2 is greater than the sum of the thicknesses of the two abutting teeth 7 on the two seats. The gap fit forms an oil film gap, which cooperates with the inner recesses arranged at the bottom ends of the clamping grooves 8 and the roots of the abutting teeth 7. This facilitates the flow and seepage of the lubricant, and the size difference also allows the abutting teeth 7 to be laterally deflected with a certain clearance.

[0057] In the scheme, the input sleeve rod 1 can also be externally configured with a bearing seat 23, which is used to lift the input sleeve rod 1 (if the power input is a motor, the bearing seat 23 and the motor are installed on the same mounting surface), so that the shaft center of the input sleeve rod 1 corresponds to the shaft center of the power shaft, that is, the shaft center of the input power remains unchanged as much as possible.

[0058] In the scheme, the oil channel 1 9 can be provided in multiple ways, as shown in the drawings. Figure 19 The upper drawing shows that the oil channel 1 9 has a small opening, which is suitable for a working environment with a small rotating speed. The lower drawing shows that the oil channel has a large opening, which is more convenient for the lubricant to flow into the oil cavity and is suitable for a working environment with a large rotating speed. However, the equipment of the scheme is suitable for a low-speed working environment.

[0059] In the further embodiment of the scheme, in order to cope with the situation of excessive load, a transition sleeve rod 3 is also provided in the embodiment. At this time, the two groups of seats are arranged at the opposite ends of the input sleeve rod 1 and the transition sleeve rod 3.

[0060] Referring to the drawings, the transition sleeve rod 3 is provided with a flange assembly 1 2 on the side facing the output sleeve rod 4, and the flange assembly 1 2 is provided with a fixed tooth sleeve 14 inserted on the side facing the output sleeve rod 4. Figure 13 Figure 14 The flange assembly 1 2 has a flange shape, and the outer edge surface is provided with a plurality of open grooves. The fixed tooth sleeve 14 is provided with an insertion column 21 corresponding to the open grooves one by one, and the fixed tooth sleeve 14 is flatly attached to the end face of the flange assembly 1 2, and the insertion column 21 is inserted into the open groove, thereby realizing the insertion of the fixed tooth sleeve 14.

[0061] Referring to the drawings, the transition sleeve rod 3 is provided with a flange assembly 1 2 on the side facing the output sleeve rod 4, and the flange assembly 1 2 is provided with a fixed tooth sleeve 14 inserted on the side facing the output sleeve rod 4. Figure 9 ​As shown, the output sleeve rod 4 is axially slidingly mounted with a mounting sleeve 16, the output sleeve rod 4 is provided with a retaining ring 18, the retaining ring 18 is inwardly bent to form a flange; the flange of the retaining ring 18 is embedded with a top spring 17, the other end of the top spring 17 abuts on the mounting sleeve 16, during assembly, the top spring 17 is in a compressed state, so that the mounting sleeve 16 always has a tendency to move in the direction of the transition sleeve rod 3. Referring to the accompanying Figure 17 As shown, the mounting sleeve 16 is provided with a key groove in the hole, and the output sleeve rod 4 is provided with a spline 402 matched with the key groove, through the cooperation of the spline 402 and the key groove, the sliding fit between the mounting sleeve 16 and the output sleeve rod 4 is realized, and the synchronous transmission of power is realized. Take the spline 402 as the key connecting component, multiple force transmission surfaces can be formed, so as to disperse local pressure and avoid stress concentration to cause premature damage of the key connection.

[0062] Referring to the accompanying Figure 17 As shown, the mounting sleeve 16 is provided with a flange assembly two 13, and the flange assembly two 13 is inserted with a movable tooth sleeve 15 facing the input sleeve rod 1 side. The flange assembly two 13 and the flange assembly one 12 are the same structure, and also present the form of flange plate, the outer edge surface has a plurality of open grooves, and the movable tooth sleeve 15 is provided with an insertion column 21 on the back side, which is flatly inserted on the flange assembly two 13 through the movable tooth sleeve 15, and the insertion column 21 is inserted into the open groove, so as to realize the insertion of the movable tooth sleeve 15.

[0063] Referring to the accompanying Figure 13 As shown, after assembly, the fixed tooth sleeve 14 and the movable tooth sleeve 15 are mutually engaged to form a power contact surface.

[0064] According to the above technical scheme: During assembly, the input sleeve rod 1, the adjusting sleeve rod 2, the transition sleeve rod 3 and the output sleeve rod 4 are sequentially connected. The input sleeve rod 1 is connected with the power input shaft, and the output sleeve rod 4 is connected with the power transmission shaft; the adjusting sleeve rod 2 realizes the power transmission between the output sleeve rod 4 and the transition sleeve rod 3 through the cooperation of the tooth 7 and the engagement groove 8; the transition sleeve rod 3 realizes the power transmission between the fixed tooth sleeve 14 and the movable tooth sleeve 15, and the power is transmitted from the transition sleeve rod 3 along the contact surface of the fixed tooth sleeve 14 and the movable tooth sleeve 15, and then transmitted to the output sleeve rod 4 through the key cooperation between the mounting sleeve 16 and the output sleeve rod 4, and finally realizes the power transmission.

[0065] The entire coupling power transmission relies on the support of the top spring 17 to ensure the firmness of the occlusion between the fixed tooth sleeve 14 and the movable tooth sleeve 15; the power output is realized against the supporting force of the top spring 17, when the output load reaches a certain degree, the top spring 17 retracts, the contact surface between the fixed tooth sleeve 14 and the movable tooth sleeve 15 gradually decreases, and finally the misalignment slides, so that the transmission fails, and the power is no longer stably and continuously transmitted. Thus, it is avoided that the excessive torque is directly transmitted to the driving side (such as a motor) or the driven side equipment, thereby reducing the permanent damage to the structure of the coupling itself, and even causing more serious equipment accidents such as burning of motor windings, gear tooth impact of speed reducer, and torsional fracture of transmission shaft.

[0066] In the embodiment, the input sleeve rod 1 is provided with an external bearing seat two 24, the bearing seat two 24 is installed on the same base surface as the output side equipment, so that the shaft center of the coupling output end and the output equipment is on the same axis during initial installation, thereby reducing the risk of output shaft center misalignment; meanwhile, the existence of the bearing seat two 24 also provides a limit for the transition sleeve rod 3, so as to prevent the transition sleeve rod 3 from being pushed left by the top spring 17 and making the tooth 7 and the root of the occlusion groove 8 abut, thereby losing the space for yielding.

[0067] The built-in bearings of the bearing seat one 23 and the bearing seat two 24 can be selected as thrust cylindrical roller bearings or thrust angular ball bearings, which can bear high axial load and can tolerate a certain angle deviation.

[0068] In embodiment 4, on the basis of embodiment 3, since the stability of power transmission is regulated by the top spring 17, if the compression spring force of the top spring 17 is unique, it is not suitable for the selection of multiple load conditions in the factory area. Therefore, in the embodiment, an external thread 403 is arranged on the outer surface of the output sleeve rod 4, the external thread 403 is located on the right side of the spline 402 of the mounting sleeve 16, that is, on the non-sliding mounting position of the output sleeve rod 4. A self-locking nut 19 is screwed on the external thread 403, a stop ring 18 is sleeved on the output sleeve rod 4, the self-locking nut 19 abuts against the stop ring 18 on the side facing the top spring 17, and one end of the spring abuts against the mounting sleeve 16 and the other end abuts against the inside of the stop ring 18. In this way, by screwing the self-locking nut 19, the initial compression degree of the top spring 17 can be adjusted, thereby the occlusion force of the fixed tooth sleeve 14 and the movable tooth sleeve 15 can be adjusted, and the adaptability of the coupling to the change of the resistance to separation with the change of the load in a certain range can be realized.

[0069] In the embodiment, the cooperation between the external thread 403 and the self-locking nut 19 has self-locking property to prevent slipping. Multiple groups of self-locking nuts 19 can be configured to improve the anti-slip effect.

[0070] In this embodiment, in order to prevent the mounting sleeve 16 from sliding off the output sleeve rod 4 against the spring 17, a limiting boss is arranged on the left side of the output sleeve rod 4, thereby limiting the left side stroke of the mounting sleeve 16, so that the mounting sleeve 16 can only be sleeved on the output sleeve rod 4 from the right side of the output sleeve rod 4 and can only be removed from the right side.

[0071] In this embodiment, referring to the accompanying drawings Figure 9 As shown in the drawings, the limiting boss arranged on the side of the output sleeve rod 4 facing the transition sleeve rod 3 is a flange structure, and a cylindrical insertion rod 20 is detachably installed by cooperating with a bolt, and the transition sleeve rod 3 is provided with a circular insertion hole matched with the insertion rod 20 on the side facing the output sleeve rod 4. When assembled, the insertion rod 20 is inserted into the insertion hole, which facilitates the centering of the transition sleeve rod 3 and the output sleeve rod 4. It also reduces the probability of eccentricity between the output sleeve rod 4 and the transition sleeve rod 3. The insertion hole and the insertion rod 20 are both chamfered, which facilitates insertion.

[0072] In this embodiment, in order to ensure that the connection caliber between the output sleeve rod 4 and the output shaft reaches a certain degree, the output sleeve rod 4 is divided into a handle rod 401 and a handle sleeve 405. The spline 402 and the external thread 403 are arranged on the handle rod 401; and the handle sleeve 405 is provided with an insertion sleeve on the back side, and the insertion sleeve inner hole is a rectangular hole, while the right end of the handle rod 401 is a rectangular shaft 404, which is inserted into the insertion sleeve and is fastened and connected through a screw, thereby realizing the detachable cooperation between the handle rod 401 and the handle sleeve 405; and by changing the handle sleeve 405, the change of the output caliber can be realized.

[0073] At this time, the handle rod 401 is a three-step stepped shaft: the left side shaft diameter is the largest, the spline 402 is arranged to cooperate with the mounting sleeve 16; the middle shaft diameter is the second, the external thread 403 is arranged to cooperate with the self-locking nut 19; and the right side is the rectangular shaft 404, which has the smallest caliber and is in the middle shaft, and is used for connecting with the handle sleeve 405. In this way, the installation of the mounting sleeve 16 and the self-locking nut 19 can be facilitated, and interference will not occur.

[0074] In embodiment 5, on the basis of embodiment 4, the fixed tooth sleeve 14 and the movable tooth sleeve 15 are used as the power transmission members of the transition sleeve rod 3 and the output sleeve rod 4, and the occlusal surface is easy to wear. In order to facilitate the replacement of the fixed tooth sleeve 14 and the movable tooth sleeve 15, in this embodiment, the fixed tooth sleeve 14 and the movable tooth sleeve 15 are both divided into two groups. As shown in the drawings Figure 15 At least two groups of insertion columns 21 are arranged on each half of the tooth sleeve, and three groups are arranged on the drawings to ensure that the insertion balance will not be deviated. When the tooth sleeve is damaged, the self-locking nut 19 is loosened, the pre-elasticity of the top spring 17 gradually decreases, and then the mounting sleeve 16 is pushed, so that the fixed tooth sleeve 14 and the movable tooth sleeve 15 are separated. At this time, the tooth sleeve can be removed and replaced, without the need to disconnect the output sleeve rod 4 and the output shaft, and the replacement is more convenient.

[0075] The overall comprehensive use process of the scheme is: When assembled, the input sleeve rod 1, the adjusting sleeve rod 2, the transition sleeve rod 3, and the output sleeve rod 4 are sequentially arranged. The input sleeve rod 1 is connected with a power input shaft, and the output sleeve rod 4 is connected with a power transmission shaft. The adjusting sleeve rod 2 is connected with the input sleeve rod 1 and the transition sleeve rod 3 through the cooperation of the tooth 7 and the engagement groove 8, so as to realize the power transmission between the output sleeve rod 4 and the transition sleeve rod 3. The transition sleeve rod 3 realizes the power transmission between the fixed sleeve 14 and the movable sleeve 15, and the power is transmitted from the transition sleeve rod 3 to the output sleeve rod 4 through the key cooperation between the mounting sleeve 16 and the output sleeve rod 4, so as to finally realize the power transmission.

[0076] The adjusting sleeve rod 2 is arranged between the input sleeve rod 1 and the transition sleeve rod 3, and the cooperation between the tooth 7 and the engagement groove 8 forms a cross connecting piece. The tooth 7 slides in the engagement groove 8, so as to compensate for the installation error between the input sleeve rod 1 and the output sleeve rod 4 or the dislocation deviation of the shaft center in the running process, thereby balancing the dislocation allowance of the power transmission center line, eliminating the partial additional stress generated in the shaft coupling due to the shaft center dislocation, reducing the fatigue damage of the shaft coupling element, reducing the probability of sudden fracture failure of the shaft coupling due to the bearing additional stress, ensuring the stability of the transmission, reducing the probability of unplanned shutdown, and reducing the safety risk.

[0077] The protection sleeve 5 arranged outside the adjusting sleeve rod 2 is provided with a lubricant, and the friction between the tooth 7 and the engagement groove 8 can be adjusted through the lubricant, so as to reduce the friction fatigue damage.

[0078] The fixed sleeve 14 and the movable sleeve 15 are tightly engaged through the top spring 17. When the output load reaches a certain degree, the top spring 17 retracts, the contact surface between the fixed sleeve 14 and the movable sleeve 15 gradually decreases, and finally the dislocation sliding occurs, so that the transmission fails, and the power is no longer stably and continuously transmitted. Thus, the excessive torque is avoided from being directly transmitted to the driving side (such as a motor) or the driven side equipment, the permanent damage of the structure of the shaft coupling is reduced, and even more serious equipment accidents such as burning of motor winding, gear tooth of speed reducer, and torsional fracture of transmission shaft are avoided.

[0079] The initial compression state of the top spring 17 can be adjusted through the self-locking nut 19, and the preelasticity range of the top spring 17 is adjusted, so as to adapt to more load conditions.

[0080] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

[0081] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0082] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A coupling with a protective sleeve structure, characterized in that: The invention comprises an input sleeve rod (1), an adjustment sleeve rod (2), and an output sleeve rod (4) in sequence. Both ends of the adjustment sleeve rod (2) are provided with engaging grooves (8) in the radial direction. Two groups of engaging grooves (8) are arranged vertically. The input sleeve rod (1) and the output sleeve rod (4) are both detachably mounted with a pedestal on one end facing the adjustment sleeve rod (2). The two pedestals are provided with biting teeth (7) embedded in the engaging grooves (8) at opposite ends. The contact surfaces of the engaging grooves (8) and the biting teeth (7) are provided with tooth-shaped notches (22). A protective sleeve (5) is provided on both pedestals. An elastic shaft seal (6) is provided between the two ends of the protective sleeve (5) and the contact surfaces of the two pedestals. The protective sleeve (5) is filled with lubricant. An oil valve is provided on the protective sleeve (5).

2. The coupling with a protective sleeve structure according to claim 1, characterized in that: The outer edge of the adjusting sleeve (2) is provided with a plurality of groups of curved spoons (11) in an annular array. An oil cavity is provided in the adjusting sleeve (2). The oil cavity is connected to an oil channel (9) corresponding to each of the curved spoons (11). The oil channel (9) passes through the curved spoon (11) and exits from the inner side of the spoon end of the curved spoon (11). The oil cavity is also symmetrically connected to a plurality of oil channels (10) and oil channels (3). The ports of the oil channels (10) and oil channels (3) respectively exit from the tooth-shaped notches (22) of the engaging grooves (8) on both sides.

3. The coupling with a protective sleeve structure according to claim 2, characterized in that: The sum of the depths of the engaging grooves (8) on both sides of the adjusting sleeve (2) is greater than the sum of the thicknesses of the biting teeth (7) on the two pedestals.

4. The coupling with a protective sleeve structure according to claim 3, characterized in that: The bottom end of the bite groove (8) and the root of the bite tooth (7) are both provided with inner grooves.

5. The coupling with a protective sleeve structure according to claim 1, characterized in that: A transition sleeve rod (3) is also provided, and two sets of pedestals are respectively arranged at opposite ends of the input sleeve rod (1) and the transition sleeve rod (3); a flange assembly (12) is provided on the side of the transition sleeve rod (3) facing the output sleeve rod (4); a fixed tooth sleeve (14) is inserted on the side of the flange assembly (12) facing the output sleeve rod (4); a mounting sleeve (16) is axially slidably mounted on the output sleeve rod (4); a top spring (17) is provided between the mounting sleeve (16) and the output sleeve rod (4); a flange assembly (2) (13) is provided on the mounting sleeve (16); a movable tooth sleeve (15) is inserted on the side of the flange assembly (13) facing the input sleeve rod (1); and the fixed tooth sleeve (14) and the movable tooth sleeve (15) are engaged with each other.

6. The coupling with a protective sleeve structure according to claim 5, characterized in that: The outer surface of the output sleeve rod (4) is provided with an external thread (403) at a non-movable portion of the mounting sleeve (16), and a self-locking nut (19) is screwed and installed on the external thread (403). The self-locking nut (19) is abutted against a retaining ring (18) on the side facing the top spring (17), and one end of the spring abuts against the mounting sleeve (16) and the other end abuts against the retaining ring (18).

7. The coupling with a protective sleeve structure according to claim 5, characterized in that: The fixed brace (14) and the movable brace (15) are both provided with a plurality of plug posts (21) on opposite sides thereof.

8. The coupling with a protective sleeve structure according to claim 5, characterized in that: The fixed braces (14) and the movable braces (15) are equally divided into two groups.

9. The coupling with a protective sleeve structure according to claim 5, characterized in that: The output sleeve rod (4) is plug-fitted with the transition sleeve rod (3).

10. The coupling with a protective sleeve structure according to claim 6, characterized in that: The output sleeve rod (4) is divided into a handle rod (401) and a handle sleeve (405). The handle rod (401) and the handle sleeve (405) are detachably connected. The handle rod (401) is a stepped shaft with a shaft diameter that decreases from the side facing the input sleeve rod (1) to the side facing away from the input sleeve rod (1). A limiting boss is provided on the side of the handle rod (401) facing the input sleeve rod (1).

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