Coupling and transmission system

Abstract

The utility model discloses a coupler and a transmission system, and relates to the technical field of couplings. The half-coupling shaft sleeve is connected with one end of the universal joint and is connected with the transmission shaft in a sleeving manner; the tensioning disc is used for applying tensioning force to the half-coupling shaft sleeve; and the multiple notches are distributed in the peripheral side face of the half-coupling shaft sleeve in an array mode. According to the coupling, the technical problems that in the prior art, a coupling shaft sleeve is large in overall rigidity, radial deformation is difficult, the sliding phenomenon occurs on the matching face of the coupling half shaft sleeve and a transmission shaft, and large-torque transmission cannot be achieved are solved; the radial rigidity of the half-coupling shaft sleeve is reduced, and the half-coupling shaft sleeve can generate larger radial deformation, so that the magnitude of interference generated by connection and matching of the half-coupling shaft sleeve and the transmission shaft is larger, transmission of larger torque is achieved, and the phenomenon that the matching surface of the half-coupling shaft sleeve and the transmission shaft slips is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a coupling and a transmission system. Background Art

[0002] A coupling is a mechanical component used to securely connect the driving and driven shafts of different mechanisms, allowing them to rotate together and transmit motion and torque. It's usually composed of two halves, each connected by a key or expansion fit, secured to the ends of the shafts, and then connected in some way. The coupling can also compensate for misalignment between the two shafts due to inaccurate manufacturing and installation, deformation during operation, or thermal expansion. As the power of the transmission system increases, the torque required to be transmitted by the coupling increases, creating new problems. Slippage often occurs at the connection between the coupling half's sleeve and the generator or gearbox shaft, preventing high torque transmission. To address this, the expansion disc is often made larger and the clearance between the coupling half's sleeve and the generator or gearbox shaft is reduced to prevent slippage by increasing the clamping force.

[0003] In the existing high-torque transmission system coupling, end teeth are formed on the end faces of the half-coupling and the universal joint flange, thereby achieving high torque transmission between the half-coupling and the universal joint connection. However, the existing half-coupling sleeve is a complete whole with great overall rigidity, making it difficult to produce radial deformation. In the mating part where the half-coupling sleeve is connected to the generator shaft or gearbox shaft, the tensioning force of the tensioning plate is insufficient, causing the mating surface between the half-coupling sleeve and the drive shaft to slip, making it impossible to achieve high torque transmission. In order to produce greater radial deformation of the half-coupling sleeve, the tensioning plate is made larger, and the tensioning plate provides a greater clamping force to prevent the mating connection part from slipping. However, the above method leads to a significant increase in the weight and cost of the coupling. On the other hand, by reducing the clearance between the coupling half and the generator shaft or gearbox shaft, a tighter fit can be achieved under the same tightening force, thereby achieving greater torque transmission. However, this approach increases the difficulty of assembling and manufacturing the coupling half and the generator shaft or gearbox shaft. Therefore, a coupling and transmission system are proposed to address the above-mentioned issues. Utility Model Content

[0004] The purpose of the utility model is to provide a coupling, which solves the technical problems in the prior art that the overall rigidity of the coupling sleeve is very large, radial deformation is difficult to produce, the tightening force of the tightening disk is insufficient, the mating surface slips, and high torque transmission cannot be achieved.

[0005] To achieve the above-mentioned purpose, the present invention provides a coupling, comprising:

[0006] Universal joints;

[0007] A half-coupling sleeve is connected to one end of the universal joint, and the half-coupling sleeve is sleeved and connected to the transmission shaft for transmitting torque;

[0008] a tensioning plate, provided on the outer peripheral side of the half-coupling shaft sleeve, for applying a tensioning force to the half-coupling shaft sleeve;

[0009] A plurality of slots are arranged in an array on the outer peripheral side of the half-coupling sleeve, and the slots extend along the axial direction of the half-coupling sleeve to reduce the radial stiffness of the half-coupling sleeve.

[0010] Preferably, the length of the notch is smaller than the length of the half-coupling sleeve, and both ends of the notch are respectively at a certain distance from both end surfaces of the half-coupling sleeve.

[0011] Preferably, circular holes are provided at both ends of the notch, and the diameter of the circular holes is greater than the width of the notch.

[0012] Preferably, the length of the notch is smaller than the length of the half-coupling sleeve, and one end of the notch extends along the axial direction of the half-coupling sleeve to the end surface of the half-coupling sleeve.

[0013] Preferably, a tension disc inner sleeve is provided on the inner circumferential side surface of the tension disc, and the inner circumferential side surface of the tension disc inner sleeve fits in contact with the outer circumferential side surface of the half-coupling shaft sleeve.

[0014] Preferably, a first conical surface is provided on the outer peripheral side surface of the inner sleeve of the tension disk, and a second conical surface is provided on the inner peripheral side surface of the tension disk, and the first conical surface is in contact with the second conical surface.

[0015] Preferably, a first flange is integrally provided on the outer peripheral side surface of the inner sleeve of the tensioning disc, and the first flange is connected to the tensioning disc via a plurality of first locking bolts.

[0016] Preferably, a second flange is integrally provided at both ends of the universal joint, a third flange is integrally provided at one end of the half-coupling sleeve close to the universal joint, and the second flange and the third flange are connected to each other by a plurality of locking bolts.

[0017] Preferably, a plurality of first teeth are arranged in an array on the end face of the universal joint, and a plurality of second teeth are arranged in an array on the end face of the half-coupling sleeve close to the universal joint, and the first teeth and the second teeth are meshed with each other.

[0018] Correspondingly, the technical solution of the present invention also provides a transmission system, including any one of the couplings described above.

[0019] Compared to the above-mentioned background technology, the present invention provides a coupling having the following beneficial effects: multiple notches are provided on the outer circumference of the coupling half sleeve, which reduces the radial stiffness of the coupling half sleeve while maintaining the overall torque transmission stiffness of the coupling half sleeve substantially unchanged. When the tensioning plate applies the same tensioning force to the coupling half sleeve, the coupling half sleeve undergoes greater radial deformation, thereby increasing the interference fit between the coupling half sleeve and the drive shaft and the friction between the mating surfaces, thereby achieving greater torque transmission, effectively preventing slippage at the coupling half sleeve and the drive shaft, and ensuring reliable operation of the transmission system. Furthermore, while ensuring the same torque transmission, the tensioning plate can be made smaller, thereby reducing the weight and cost of the coupling. Furthermore, the clearance between the coupling half sleeve and the drive shaft can be appropriately increased, effectively reducing the difficulty of manufacturing and assembling the coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 A schematic cross-sectional view of a coupling provided by an embodiment of the present utility model;

[0022] Figure 2 A schematic plan view of a half-coupling sleeve provided in an embodiment of the present utility model;

[0023] Figure 3 A schematic plan view of a half-coupling sleeve provided in another embodiment of the present utility model.

[0024] Specifically, 1-generator shaft; 2-half coupling sleeve; 3-tension plate; 4-universal joint; 5-gearbox shaft; 6-tension plate inner sleeve; 7-slot; 8-round hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] like Figure 1 As shown, in order to achieve the above purpose, the utility model provides a coupling, including: a universal joint 4, a half-coupling sleeve 2 and a transmission shaft.

[0028] Among them, the two ends of the universal joint 4 are respectively connected to a half-coupling sleeve 2, and the half-coupling sleeve 2 is sleeved and connected to the transmission shaft, which is the generator shaft 1 or the gearbox shaft 5. Specifically, the left end of the universal joint 4 is connected to the half-coupling sleeve 2, and the half-coupling sleeve 2 is sleeved and connected to the right end of the generator shaft 1. The right end of the universal joint 4 is connected to the half-coupling sleeve 2, and the half-coupling sleeve 2 is sleeved and connected to the left end of the gearbox shaft 5.

[0029] It should be noted that a tensioning plate 3 is provided on the outer peripheral side of the half-coupling sleeve 2, and the tensioning plate 3 is coaxially arranged on the circumferential outer side of the half-coupling sleeve 2. A tensioning force is applied to the half-coupling sleeve 2 through the tensioning plate 3, so that the inner hole of the half-coupling sleeve 2 is interference fit with the outer circle of the transmission shaft to realize torque transmission.

[0030] In addition, a plurality of slots 7 are arranged in an array on the outer peripheral side surface of the half-coupling sleeve 2, and the slots 7 extend along the axial direction of the half-coupling sleeve 2, wherein the number of slots 7 is multiple, and preferably, the number of slots 7 is 3; since the half-coupling has a large radial stiffness, its original shape and size change little after being subjected to the radial force of the tensioning disk 3. By arranging a plurality of slots 7 on the outer peripheral side surface of the half-coupling sleeve 2, the radial stiffness of the half-coupling sleeve 2 can be reduced. When the tensioning disk 3 applies the same tensioning force to the half-coupling sleeve 2, the half-coupling sleeve 2 can produce a greater radial deformation, thereby making the interference fit between the half-coupling sleeve 2 and the drive shaft greater, and the friction force of the mating surface greater, thereby achieving greater torque transmission, effectively preventing the half-coupling sleeve 2 and the drive shaft from slipping, and ensuring the reliable operation of the transmission system.

[0031] In one embodiment of the present invention, a tensioning disc inner sleeve 6 is provided on the inner circumferential side of the tensioning disc 3, and the inner circumferential side of the tensioning disc inner sleeve 6 fits the outer circumferential side of the half-coupling shaft sleeve 2, and the outer circumferential side of the tensioning disc inner sleeve 6 fits the inner circumferential side. It should be noted that the outer circumferential side of the tensioning disc inner sleeve 6 is provided with a first conical surface, and the inner circumferential side of the tensioning disc 3 is provided with a second conical surface, and the first conical surface fits the second conical surface. When in use, the tensioning disc 3 is first sleeved on the half-coupling shaft sleeve 2, and then the tensioning disc 3 is sleeved on the half-coupling shaft sleeve 2. The tightening disc 3 is further pushed to one end of the half-coupling sleeve 2, and then the tightening disc inner sleeve 6 is sleeved on the half-coupling sleeve 2. Through the cooperation between the tightening disc 3 and the tightening disc inner sleeve 6, the second conical surface supports the first conical surface, so that the tightening disc inner sleeve 6 is radially deformed and squeezes the outer peripheral side of the half-coupling sleeve 2. After the half-coupling sleeve 2 is subjected to the radial force of the tightening disc inner sleeve 6, it is radially deformed until the inner hole of the half-coupling sleeve 2 is interference fit with the outer circle of the drive shaft, and the assembly of the coupling is completed.

[0032] It should be noted that a first flange is integrally provided on the outer peripheral side of the inner sleeve 6 of the tensioning disc, and the first flange is connected to the tensioning disc 3 through a plurality of first locking bolts. By sequentially screwing the first locking bolts in the forward direction, the tensioning disc 3 gradually approaches the first flange, and then the second conical surface supports the first conical surface.

[0033] Preferably, a positioning groove is provided on the end face of the tensioning plate 3 close to the first flange, and the positioning groove is generally in the shape of a ring. When the tensioning plate 3 gradually approaches the first flange, the positioning groove can accommodate the first flange, so that the tensioning plate 3 further squeezes the tensioning plate inner sleeve 6, thereby increasing the radial force of the tensioning plate inner sleeve 6 on the half-coupling sleeve 2, and further enhancing the stability of torque transmission between the drive shaft half-coupling sleeve 2.

[0034] The length of the slot 7 is smaller than the length of the half-coupling sleeve 2, and the two ends of the slot 7 are respectively at a certain distance from the two end surfaces of the half-coupling sleeve 2. At this time, the slot 7 is only located at the part of the half-coupling sleeve 2 that is subjected to the force of the tensioning plate inner sleeve 6. This can ensure that the assembly is more convenient. At the same time, it ensures that the stiffness of the overall torque transmission of the half-coupling will not be reduced, effectively ensuring the stability of the torque transmission between the drive shaft half-coupling sleeve 2.

[0035] Furthermore, the length of the slot 7 is greater than the length of the connection surface between the transmission shaft and the half-coupling sleeve 2, to ensure that the length of the connection surface between the half-coupling sleeve 2 and the transmission shaft remains unchanged after radial deformation, thereby ensuring the overall torque transmission effect of the coupling.

[0036] like Figure 2As shown, in one embodiment of the present invention, a plurality of circular holes 8 are arranged in an array on the outer peripheral side surface of the half-coupling sleeve 2, and a circular hole 8 is provided at both ends of each notch 7, and the diameter of the circular hole 8 is greater than the width of the notch 7. When processing the notch 7, a circular hole 8 is first processed at the end position of the notch 7, and the diameter of the circular hole 8 is greater than the width of the notch 7. Then, the notch 7 is processed along the axial direction of the half-coupling sleeve 2 by milling or wire cutting. The notch 7 is connected and penetrated with the circular hole 8. On the one hand, preferentially processing a circular hole 8 at the end position of the notch 7 can prevent stress concentration from occurring after the end of the notch 7 is compressed, reduce the crack resistance of the end of the notch 7, and thus improve the overall force strength of the half-coupling sleeve 2. On the other hand, the provision of the circular hole 8 can reduce the difficulty of processing the notch 7.

[0037] like Figure 3 As shown, in another embodiment of the present invention, the length of the notch 7 is smaller than the length of the half-coupling sleeve 2, and one end of the notch 7 extends along the axial direction of the half-coupling sleeve 2 to the end face of the half-coupling sleeve 2. At this time, the half-coupling sleeve 2 is more convenient to assemble onto the drive shaft. At the same time, on the basis of ensuring that the stiffness of the overall torque transmission of the half-coupling sleeve 2 remains unchanged, compared with the design method in which the two ends of the notch 7 have a certain distance from the two end faces of the half-coupling sleeve 2, the half-coupling sleeve 2 can produce a larger radial deformation, thereby facilitating the further increase of the fitting clearance between the half-coupling sleeve 2 and the drive shaft, thereby reducing the difficulty of manufacturing and assembling the coupling.

[0038] It should be noted that a circular hole 8 is provided at the right end of each slot 7, and the diameter of the circular hole 8 is larger than the width of the slot 7 to prevent stress concentration after the end of the slot 7 is compressed, thereby reducing the crack resistance of the right end of the slot 7, thereby improving the overall force strength of the half-coupling sleeve 2.

[0039] In another embodiment of the present invention, a plurality of first strip-shaped protrusions (not shown in the figure) are provided on the outer peripheral side surface of the left end portion of the generator shaft 1. The first strip-shaped protrusions are integrally formed on the outer peripheral side surface of the generator shaft 1, and the first strip-shaped protrusions extend a certain length along the axial direction of the generator shaft 1. Each strip-shaped protrusion corresponds to a notch 7. When the outer circle of the generator shaft 1 and the inner hole of the half-coupling sleeve 2 are interference fit, the first strip-shaped protrusions cooperate with the notch 7, which can further prevent slippage in the mating connection portion between the generator shaft 1 and the half-coupling sleeve 2. At the same time, a number of second strip-shaped protrusions (not shown in the figure) are provided on the outer peripheral side surface of the right end portion of the gearbox shaft 5. The second strip-shaped protrusions are integrally formed on the outer peripheral side surface of the gearbox shaft 5, and the second strip-shaped protrusions extend a certain length along the axial direction of the gearbox shaft 5. Each strip-shaped protrusion corresponds to a notch 7. When the outer circle of the gearbox shaft 5 and the inner hole of the half-coupling sleeve 2 are interference fit, the second strip-shaped protrusions cooperate with the notch 7, which can further avoid slippage in the mating connection part between the gearbox shaft 5 and the half-coupling sleeve 2, thereby improving the stability of the overall torque transmission of the coupling.

[0040] In addition, a second flange is integrally provided at both ends of the universal joint 4, and a third flange is integrally provided at the end of the half-coupling sleeve 2 near the universal joint 4. Specifically, the second flange and the third flange are interconnected by a plurality of locking bolts, and the locking bolts provide a tightening effect between the half-coupling sleeve 2 and the universal joint 4. It should be further explained that a plurality of first teeth are arranged in an array on the end face of the universal joint 4, and a plurality of second teeth are arranged in an array on the end face of the half-coupling sleeve 2 near the universal joint 4, and the first teeth and the second teeth are meshed with each other. The meshing of the first teeth and the second teeth provides a torque transmission effect between the half-coupling sleeve 2 and the universal joint 4, thereby achieving high torque transmission at the connection portion between the half-coupling and the universal joint 4.

[0041] When the utility model is used, the second flange and the third flange are connected by locking bolts to connect the half-coupling sleeve 2 and the universal joint 4. At the same time, the first teeth are engaged with the second teeth to realize the torque transmission between the half-coupling sleeve 2 and the universal joint 4. The half-coupling sleeve 2 at the left end of the universal joint 4 is sleeved on the right end of the generator shaft 1, and the half-coupling sleeve 2 at the right end of the universal joint 4 is sleeved on the left end of the gearbox shaft 5. The first locking bolt is screwed forward, and the tensioning plate 3 gradually approaches the first flange. The tensioning plate 3 gradually increases the radial extrusion force on the tensioning plate inner sleeve 6. The two tensioning plate inner sleeves 6 are radially deformed by the radial force of the tensioning plate 3 and are respectively fixed to the right end of the generator shaft 1 and the left end of the gearbox shaft 5 until the tensioning plate inner sleeve 6 and the half-coupling sleeve 2 are interference fit, the half-coupling sleeve 2 and the generator shaft 1 are interference fit, and the half-coupling sleeve 2 and the gearbox shaft 5 are interference fit, completing the assembly of the coupling.

[0042] In summary, by arranging a plurality of notches 7 on the outer peripheral side surface of the half-coupling sleeve 2, the radial stiffness of the half-coupling sleeve 2 is reduced on the basis of keeping the stiffness of the overall torque transmission of the half-coupling sleeve 2 basically unchanged, so that the half-coupling sleeve 2 can produce a larger radial deformation, thereby making the interference fit between the half-coupling sleeve 2 and the drive shaft larger, effectively preventing the slippage of the connection part between the half-coupling sleeve 2 and the drive shaft, thereby realizing the transmission of greater torque of the coupling.

[0043] In addition to the above-mentioned coupling, the present invention also provides a transmission system including the coupling disclosed in the above-mentioned embodiment. For the structures of other parts of the transmission system, please refer to the prior art and will not be described in detail herein.

[0044] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0045] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A coupling, characterized in that: include: Universal joints; A half-coupling sleeve is connected to one end of the universal joint, and the half-coupling sleeve is sleeved and connected to the transmission shaft for transmitting torque; a tensioning plate, provided on the outer peripheral side of the half-coupling shaft sleeve, for applying a tensioning force to the half-coupling shaft sleeve; A plurality of slots are arranged in an array on the outer peripheral side of the half-coupling sleeve, and the slots extend along the axial direction of the half-coupling sleeve to reduce the radial stiffness of the half-coupling sleeve.

2. A coupling according to claim 1, characterized in that: The length of the notch is smaller than the length of the half-coupling sleeve, and both ends of the notch are respectively at a certain distance from both end surfaces of the half-coupling sleeve.

3. A coupling according to claim 2, characterized in that: Circular holes are provided at both ends of the notch, and the diameter of the circular holes is greater than the width of the notch.

4. A coupling according to claim 1, characterized in that: The length of the notch is smaller than the length of the half-coupling sleeve, and one end of the notch extends along the axial direction of the half-coupling sleeve to the end surface of the half-coupling sleeve.

5. A coupling according to any one of claims 1 to 4, characterized in that: An inner sleeve of the expansion disk is provided on the inner peripheral side surface of the expansion disk, and the inner peripheral side surface of the expansion disk inner sleeve is in contact with the outer peripheral side surface of the half-coupling shaft sleeve.

6. A coupling according to claim 5, characterized in that: A first conical surface is provided on the outer peripheral side surface of the inner sleeve of the tension disk, and a second conical surface is provided on the inner peripheral side surface of the tension disk, and the first conical surface is in contact with the second conical surface.

7. A coupling according to claim 6, characterized in that: A first flange is integrally provided on the outer peripheral side surface of the inner sleeve of the tensioning disc, and the first flange is connected to the tensioning disc via a plurality of first locking bolts.

8. The coupling according to claim 1, characterized in that: A second flange is integrally provided at both ends of the universal joint, a third flange is integrally provided at one end of the half coupling sleeve close to the universal joint, and the second flange and the third flange are connected to each other by a plurality of locking bolts.

9. A coupling according to claim 8, characterized in that: The end face array of the universal joint is provided with a plurality of first teeth, and the end face array of one end of the half-coupling sleeve close to the universal joint is provided with a plurality of second teeth, and the first teeth and the second teeth are meshed with each other.

10. A transmission system, characterized in that: A coupling comprising any one of claims 1 to 9.

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