Shaft collar and coupling

Abstract

The shaft ring comprises an inner hole and a base surrounding the outer portion of the inner hole, a screw hole is formed in the base, a fastener is arranged in the screw hole and comprises a first end and a second end, the first end protrudes out of the screw hole, and the second end protrudes out of the screw hole. The screw hole comprises a threaded area with threads and a smooth area without threads, the threaded area is arranged close to the first end, the smooth area is far away from the first end relative to the threaded area, and the fastener is limited to move in the threaded area. The fastening piece is arranged in the screw hole, the situation that the fastening piece needs to be additionally inserted into the screw hole is avoided, the number of parts is reduced, meanwhile, the threaded area and the non-threaded area are arranged in the screw hole, the fastening piece can only move in the threaded area, and when the coupler rotates at a high speed, the fastening piece can not move in the non-threaded area. And the fastener cannot fly out of the screw hole through the smooth area due to the influence of centrifugal force.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a shaft collar and a coupling. Background Art

[0002] With the development of science and the progress of technology, the application of machinery is becoming more and more extensive. In transportation or power machinery, couplings are essential.

[0003] Diaphragm couplings are widely favored because of their relatively compact structure, high strength and long service life. Among them, the coupling usually includes a shaft sleeve and a shaft collar. During the assembly of the output shaft of the motor and the coupling, the shaft sleeve of the coupling is sleeved outside the output shaft of the motor, and the shaft collar is sleeved outside the sleeve of the shaft sleeve. The shaft collar and the shaft sleeve are tightened by set screws or screws to limit the relative movement between the shaft collar, the shaft sleeve and the output shaft of the motor. When disassembling the shaft sleeve and the shaft collar, if not careful, the set screw or screw will fall out of the shaft collar, bringing a lot of inconvenience. Or when the equipment is running at high speed, the set screw or screw is affected by the centrifugal force and is easy to fly out of the screw hole, generating a large potential safety hazard and increasing the cost of daily maintenance.

[0004] In view of this, it is necessary to provide a shaft collar and a coupling to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a shaft collar that is easy to disassemble and prevents the screw from splashing during disassembly.

[0006] To achieve the above purpose, the utility model provides a shaft collar applied to a coupling. The shaft collar includes an inner hole and a base surrounding the inner hole. The base is provided with a screw hole, and a fastener is arranged in the screw hole. The fastener includes a first end and a second end. The first end protrudes out of the screw hole. The screw hole includes a threaded area with threads and a smooth area without threads. The threaded area is arranged close to the first end, and the smooth area is farther from the first end relative to the threaded area. The fastener is restricted to move in the threaded area.

[0007] As a further improvement of the utility model, the base is further provided with a through hole configured to allow a locking member to pass through. The through hole and the screw hole are arranged alternately along the outer circumference of the inner hole.

[0008] As a further improvement of the utility model, the base is further provided with a lifting ring hole configured to be used when the coupling is lifted. The lifting ring hole, the through hole and the screw hole are arranged in sequence and circulated along the outer circumference of the inner hole.

[0009] As a further improvement of the present utility model, the base includes a base and a stepped portion located on one side of the base, and the outer diameter of the stepped portion is smaller than the outer diameter of the base.

[0010] As a further improvement of the present utility model, the first end of the fastener is located on the side of the base facing away from the stepped portion.

[0011] As a further improvement of the present utility model, the screw hole, the through hole and the lifting ring hole are all located on the base.

[0012] Another object of the present utility model is to provide a coupling including the above shaft collar.

[0013] To achieve the above object, the present utility model provides a coupling including the above shaft collar.

[0014] As a further improvement of the present utility model, the coupling includes a shaft sleeve disposed adjacent to the shaft collar, and the first end of the fastener abuts against the shaft sleeve to limit the displacement of the shaft sleeve.

[0015] Compared with the prior art, by placing the fastener inside the screw hole in the shaft collar of the present utility model, it is avoided that an additional fastener needs to be inserted into the screw hole during installation, reducing the number of components. At the same time, by providing a threaded area and a non-threaded area in the screw hole, the fastener can only displace in the threaded area, and when the coupling rotates at high speed, it can prevent the fastener from flying out of the screw hole of the shaft collar due to the influence of centrifugal force, improving the convenience and safety of the coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structure diagram of a shaft collar according to an embodiment of the present utility model.

[0017] Figure 2 is Figure 1 an enlarged view of the circled part in the shaft collar shown.

[0018] Figure 3 is Figure 1 a sectional view of the shaft collar shown.

[0019] Figure 4 is a three-dimensional structure diagram of a coupling according to an embodiment of the present utility model.

[0020] Figure 5 is an assembly schematic diagram of a coupling and a motor according to an embodiment of the present utility model.

[0021] Figure 6 is a three-dimensional structure diagram of a shaft collar according to another embodiment of the present invention.

[0022] Figure 7 isFigure 6 Cross-sectional view of the collar shown.

[0023] Figure 8 is Figure 6 Cross-sectional view of the collar shown after removing the fastener.

[0024] Explanation of reference numerals:

[0025] 100 - Collar, 110 - Inner hole, 120 - Base, 130 - Step portion, 131 - Step surface, 132 - Step wall, 140 - Base, 141 - End face, 142 - Screw hole, 1421 - Threaded area, 1422 - Smooth area, 150 - Chamfer, 143 - Through hole, 144 - Hoisting ring hole, 160 - Fastener, 161 - First end, 162 - Second end;

[0026] 200 - Coupling, 210 - Intermediate portion, 220 - Transmission mechanism, 221 - Bush;

[0027] 300 - Insert, 310 - Insertion structure, 320 - Main body structure, 321 - Bottom surface. Detailed implementation manner

[0028] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Here, it should be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, while other details less related to the present utility model are omitted.

[0030] In addition, it should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0031] This embodiment relates to a collar 100 and a coupling 200 including the collar 100. The coupling 200 is configured to be connected to an insert 300. The insert 300 includes a main body structure 320 and an insertion structure 310. The insertion structure 310 is at least partially inserted into the coupling 200. The collar 100 forms an installation gap between the base 140 in the collar 100 and the insert 300 through the provided step portion 130, providing a larger operating space compared with the conventional collar 100.

[0032] Please refer to Figure 4As shown in the figure, it is a three-dimensional structure diagram of a coupling 200 provided for a specific embodiment of the present utility model. The coupling 200 includes an intermediate portion 210 and transmission mechanisms 220 located at both ends of the intermediate portion 210. A collar 100 is located on the side of the transmission mechanism 220 facing away from the intermediate portion 210. One of the transmission mechanisms 220 is connected to the insertion structure 310 of the insert 300, and the other transmission mechanism 220 is connected to the driven shaft. Through the coupling 200, the driven shaft is enabled to rotate synchronously with the insertion structure 310.

[0033] The insert 300 includes an insertion structure 310 and a main body structure 320. When installing or disassembling the insert 300 and the coupling 200, at least a part of the insertion structure 310 is inserted into the coupling 200. By tightening or loosening the locking member on the end face 141 of the collar 100, the fixed connection or loosening between the insertion structure 310 and the coupling 200 is achieved. During this process, the space between the insert 300 and the collar 100 is often extremely narrow. Especially when both the insert 300 and the coupling 200 are installed in the main spindle box, due to the limitation of the space in the main spindle box, the insert 300 and the collar 100 are closely fitted, resulting in a very small construction operation space and very low efficiency during assembly or disassembly.

[0034] In addition, in order to reduce the weight of the coupling 200, the intermediate portion 210 of the coupling 200 often uses lightweight materials, while the transmission mechanisms 220 at both ends still often use metals, such as stainless steel or aluminum alloy, to meet the requirements of rigidity and structural strength. As a result, the weight of the coupling 200 is still relatively large, and the inertia of the coupling 200 is also relatively large, resulting in a relatively large mechanical load and a problem of slow response speed.

[0035] Please refer to Figures 1 to 3 As shown in the figure, it is a three-dimensional structure diagram of a collar 100 provided for a specific embodiment of the present utility model. The collar 100 is mainly applied to the coupling 200, and the coupling 200 is connected to the insertion structure 310 of the insert 300. The collar 100 includes an inner hole 110 and a base 120 surrounding the outer side of the inner hole 110. Among them, the base 120 includes a base 140 and a stepped portion 130. The outer diameter of the stepped portion 130 is smaller than the outer diameter of the base 140. The base 140 includes an end face 141 facing the stepped portion 130. The main body structure 320 of the insert 300 includes a bottom face 321 facing the end face 141. The insert 300 includes a main body structure 320 and an insertion structure 310 at least partially inserted into the coupling 200. The insertion structure 310 is inserted into the inner hole 110 from one side of the stepped portion 130, and the stepped portion 130 is configured to form a gap between the bottom face 321 and the end face 141.

[0036] As Figure 5As shown, after the insertion structure 310 of the insert 300 is inserted into the inner hole 110 of the collar 100, a fixed gap is formed between the bottom surface 321 and the end surface 141 of the base 140 of the collar 100 through the set step portion 130. The size of the gap is the thickness of the step portion 130 along the axial direction of the inner hole 110. In this way, when the locking piece on the collar 100 is tightened or loosened, the gap created by the step portion 130 can provide a larger operating space, reduce the difficulty of installation and disassembly, and improve the efficiency of installation and maintenance.

[0037] At the same time, in the collar 100, the design of the step portion 130 also significantly reduces the mass of the collar 100. On the premise of maintaining the rigidity of the collar 100, the inertia of the coupling 200 during operation is reduced, thereby reducing the impact on mechanical transmission.

[0038] In this embodiment, the diameter of the inner hole 110 gradually increases along the insertion direction of the insertion structure 310. The tapered design of the inner hole 110 can also disperse the contact stress between the collar 100 and the insertion structure 310 to a certain extent, reducing the wear caused by stress concentration. At the same time, the close contact also helps to prevent additional wear caused by looseness or vibration, thereby extending the service life of the coupling 200 and the entire transmission system.

[0039] In some other embodiments, the diameter of the inner hole 110 may also remain consistent, and the present invention is not limited to this.

[0040] In this embodiment, the step portion 130 includes a step surface 131 and a step wall 132, the step surface 131 is parallel to the end surface 141, and the two ends of the step wall 132 are respectively connected to the step surface 131 and the end surface 141 through chamfers 150. The design that the step surface 131 is parallel to the end surface 141 enables the step portion 130 to disperse stress more evenly when bearing vertical and horizontal loads, thereby enhancing the stability of the overall structure of the collar 100. The step wall 132 serves as a supporting structure, and its two ends are connected to the step surface 131 and the base 140 through chamfers 150. This connection method can more effectively transfer and disperse the load, reduce stress concentration, and improve the structural bearing capacity and safety of the collar 100.

[0041] See also Figure 3 As shown, in this embodiment, the step wall 132 is perpendicular to the end surface 141 and the step surface 131. The vertical arrangement can ensure the structural stability of the step portion 130, so that the step portion 130 can withstand greater stress without being easily deformed or damaged.

[0042] In this embodiment, along the axial direction of the inner hole 110, the thickness of the step portion 130 is the first thickness, and the thickness of the collar 100 is the second thickness. The ratio of the first thickness to the second thickness is greater than or equal to 25% and less than or equal to 35%. When the ratio of the first thickness to the second thickness is within this range, it can ensure that the collar 100 has sufficient strength and stiffness, thereby maintaining the stability of the structure. The step portion 130, as the key supporting part of the collar 100, the reasonable ratio of its thickness to the overall thickness helps to disperse and resist external stresses, preventing the collar 100 from deforming or being damaged during use. On the premise of ensuring the structural stability, by adjusting the thickness ratio of the step portion 130 to the overall collar 100, the weight of the collar 100 can be optimized to a certain extent, which is particularly important for application scenarios that require weight control (such as aerospace, automotive manufacturing, etc.).

[0043] In this embodiment, a chamfer 150 is provided at the edge of the base 140 facing away from the inner hole 110. The chamfer 150 can smoothly transition the right angle at the edge of the base 140, reducing the possible cracking or damage caused by stress concentration at the right angle, which is of great significance for improving the overall durability of the base 120 and extending its service life. At the same time, setting the chamfer 150 at the edge of the base 140 can prevent scratches or damages caused by sharp corners when people or objects come into contact, improving the safety during installation or disassembly.

[0044] In this embodiment, the collar 100 is assembled with the insertion structure 310 of the insert 300. In some other embodiments, it can also be assembled with other mechanical components, and gaps can be generated between the base 140 and other mechanical components. The present invention does not limit this.

[0045] Please continue to refer to Figures 6 to 8 As shown, for the collar 100 of another embodiment of the present invention, the transmission mechanism 220 of the coupling 200 further includes a bushing 221. When the insert 300 is assembled with the coupling 200, the insertion structure 310 is inserted into the sleeve of the bushing 221, and the collar 100 is sleeved outside the sleeve of the bushing 221. During the high-speed operation of the coupling 200, affected by the centrifugal force, the fastener 160 is likely to fly out from the collar 100, bringing a relatively large safety hazard and greatly increasing the cost of daily maintenance.

[0046] In this embodiment, a threaded hole 142 is provided on the base 140 of the collar 100, and a fastener 160 is disposed inside the threaded hole 142. The collar includes an inner hole 110 and a base 120 surrounding the outside of the inner hole 110. A threaded hole 142 is provided on the base 120, and a fastener 160 is disposed inside the threaded hole 142. The fastener 160 includes a first end 161 and a second end 162. The first end 161 of the fastener 160 protrudes outside the threaded hole 142. On the collar

[0047] When the collar 100 is assembled with the bushing 221, the first end 161 of the fastener 160 abuts against the bushing 221. The threaded hole 142 includes a threaded region 1421 with threads and a smooth region 1422 without threads. The threaded region 1421 is arranged close to the first end 161, and the smooth region 1422 is farther from the first end 161 relative to the threaded region 1421. The fastener 160 is restricted to move within the threaded region 1421.

[0048] By placing the fastener 160 inside the threaded hole 142, the collar 100 avoids the need to additionally insert the fastener 160 into the threaded hole 142 during installation, reducing the number of components. At the same time, by providing the threaded region 1421 and the non-threaded region 1421 in the threaded hole 142, the fastener 160 can only displace within the threaded region 1421. When the collar 100 rotates at high speed, the fastener 160 will not fly out of the threaded hole 142 through the smooth region 1422 due to the influence of centrifugal force, ensuring the safety of the coupling 200 during operation and keeping the bushing 221 always relatively fixed to the insertion structure 310 of the insert 300 without displacement.

[0049] In this embodiment, the base 140 is further provided with a through hole 143 configured for the locking member to pass through. The through hole 143 and the threaded hole are arranged alternately along the outer circumference of the inner hole 110. When assembling the collar 100 with the bushing 221, inserting the locking member into the through hole 143 can quickly complete the connection, making the assembly more convenient.

[0050] In this embodiment, the base is further provided with a lifting ring hole 144 configured for use when hoisting the coupling 200. The lifting ring hole 144, the through hole 143, and the threaded hole are arranged in a cyclic order along the outer circumference of the inner hole 110. In some scenarios, the volumes and masses of the insert 300 and the coupling 200 are relatively large, and hoisting is required during installation. In the collar 100 of the present invention, the base 140 is further provided with a lifting ring hole 144, which facilitates the hoisting of the coupling 200 and the insert 300 during installation.

[0051] In this embodiment, the fastener 160 is a set screw. As the fastener 160, the set screw is more convenient for installation and disassembly, has various structural forms, good versatility and interchangeability, and can preferably fix the collar 100 and the bushing 221, so that the bushing 221 and the collar 100 will not displace relative to the insertion structure 310 of the insert 300. In some other embodiments, the fastener 160 can also be other types of parts, and the present invention does not limit this.

[0052] In this embodiment, the first end 161 of the fastener 160 is located on the side of the base 140 facing away from the step portion 130. When the coupling 200 and the insertion structure 300 are assembled, the step portion 130 of the collar 100 forms a gap between the bottom surface 321 of the insert 300 and the end surface 141 of the collar 100. The side of the base 140 facing away from the step portion 130 faces the bushing 221, and the first end 161 of the fastener 160 abuts against the bushing 221, so that the fastener 160 can be clamped with the bushing 221 and it is not easy to displace relative to each other.

[0053] In summary, for the collar 100 of the present utility model, the base 120 of the collar 100 includes a step portion 130 and a base 140. The outer diameter of the step portion 130 is smaller than the outer diameter of the base 140. When the collar 100 is assembled with the insertion structure 310 of the insert 300, due to the existence of the step portion 130, a fixed gap will be formed between the bottom surface 321 of the insert 300 and the end surface 141 of the collar 100. In this way, when tightening or loosening the locking member on the collar 100, the gap created by the step portion 130 can provide a large operating space, reducing the difficulty of installation and disassembly and improving the efficiency of installation and maintenance. Moreover, the design of the step portion 130 can reduce the weight of the collar 100 while maintaining the rigid strength of the collar 100, thereby reducing the inertia of the collar 100 and the coupling 200 during operation. In addition, by disposing the fastener 160 inside the threaded hole 142, the need to separately insert the fastener 160 into the threaded hole 142 during installation is avoided, reducing the number of components and enhancing the convenience during assembly or disassembly. At the same time, by providing a threaded region 1421 and a non-threaded region 1421 in the threaded hole 142, the fastener 160 can only displace in the threaded region 1421. When the coupling 200 is running at high speed, the fastener 160 will not fly out of the threaded hole 142 through the smooth region 1422, enhancing the safety of the coupling 200.

[0054] In the description of the present utility model, it should be understood that the terms (if any) "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A shaft collar, applied to a coupling, characterized in that The collar includes a bore and a base surrounding the outside of the bore. A threaded hole is provided on the base, and a fastener is disposed in the threaded hole. The fastener includes a first end and a second end. The first end protrudes outside the threaded hole. The threaded hole includes a threaded region with threads and a smooth region without threads. The threaded region is disposed near the first end, and the smooth region is farther from the first end relative to the threaded region. The fastener is restricted to move within the threaded region.

2. The collar according to claim 1, wherein, A through hole is further provided on the base. The through hole is configured to allow a locking member to pass through. The through hole and the threaded hole are arranged alternately along the outer circumference of the bore.

3. The collar according to claim 2, characterized in that, A lifting ring hole is further provided on the base. The lifting ring hole is configured to be used when hoisting the coupling. The lifting ring hole, the through hole, and the threaded hole are arranged in a cyclic order along the outer circumference of the bore.

4. The collar according to claim 3, characterized in that, The base includes a base body and a stepped portion located on one side of the base body. The outer diameter of the stepped portion is smaller than the outer diameter of the base body.

5. The collar according to claim 4, wherein, The first end of the fastener is located on the side of the base body facing away from the stepped portion.

6. The collar according to claim 4, characterized in that, The threaded hole, the through hole, and the lifting ring hole are all located on the base body.

7. A coupling, characterized in that, It includes the collar according to any one of claims 1 to 6.

8. The coupling according to claim 7, characterized in that, The coupling includes a bushing adjacent to the collar. The first end of the fastener abuts against the bushing to restrict the displacement of the bushing.

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