Diaphragm coupling

Abstract

The diaphragm coupling comprises a middle body and two half couplings symmetrically arranged at the two ends of the middle body, and positioning openings are formed in the two ends of the middle body in a concave mode; each half coupling comprises a coupling, a shaft sleeve end flange and a diaphragm arranged between the coupling and the shaft sleeve end flange, the coupling is provided with a shaft hole, the shaft sleeve end flange comprises a disc body and a positioning boss, the disc body is connected with the middle body through a connecting assembly, and the positioning boss is arranged on the disc body. The positioning boss is arranged in the center of the end face, back to the coupling, of the disc body in a protruding mode, and the positioning boss is inserted into the positioning opening in the corresponding end. And the diaphragm is arranged between the coupling and the disc body. The coaxiality precision of shaft holes in the two ends of the assembled diaphragm coupling can be improved.

Description

Technical Field

[0001] The invention relates to a coupling, in particular to a diaphragm coupling. Background Art

[0002] Existing diaphragm couplings, for example, a diaphragm coupling disclosed in the Chinese utility model patent with announcement number CN218542987U, includes two symmetrically arranged half couplings, an intermediate body is provided between the two half couplings, and a diaphragm is provided between the half coupling and the intermediate body. One half coupling is provided with an axial hole connected to the input shaft, and the other half coupling is provided with an axial hole connected to the output shaft. In this diaphragm coupling, the intermediate body is directly connected to the diaphragm. Since the diaphragm itself has elastic distortion, it is difficult to maintain the coaxiality of the intermediate body and the half coupling during assembly, which results in the assembled diaphragm coupling having poor coaxiality accuracy of the axial holes of the two half couplings, and the assembled diaphragm coupling often has a large runout value. In addition, since the diaphragm coupling of the prior art, in which the intermediate body, the diaphragm and the half coupling are directly connected into a whole by a bolt assembly, it is difficult to adjust the coaxiality of the diaphragm coupling after assembly. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a diaphragm coupling, which can improve the coaxiality accuracy of shaft holes at both ends of the diaphragm coupling after assembly.

[0004] A diaphragm coupling comprises an intermediate body and two half couplings symmetrically arranged at both ends of the intermediate body, wherein both ends of the intermediate body are provided with positioning openings; each of the half couplings comprises a coupling, a sleeve end flange and a diaphragm arranged between the coupling and the sleeve end flange, wherein the coupling is provided with an axial hole, and the sleeve end flange comprises a disc body and a positioning boss, wherein the disc body is connected to the intermediate body through a connecting assembly, wherein the positioning boss is convexly arranged at the center of the end face of the disc body facing away from the coupling, and wherein the positioning boss is inserted into the positioning opening at the corresponding end; wherein the diaphragm is arranged between the coupling and the disc body.

[0005] Furthermore, the positioning opening is a stop opening, and the positioning boss is clearance-matched with the positioning opening.

[0006] Furthermore, an assembly clearance between the outer peripheral surface of the positioning boss and the peripheral wall of the groove of the positioning opening is 0.03-0.05 mm.

[0007] Furthermore, a center hole is provided at the center of the shaft sleeve end flange, and the center hole penetrates the disc body and the positioning boss along the axial direction of the shaft sleeve end flange.

[0008] Furthermore, the outer peripheral surface of the positioning boss is coaxially arranged with the inner peripheral wall of the center hole.

[0009] Furthermore, the disk body has a first end face, a second end face and an outer peripheral wall that are relatively arranged, the second end face is closer to the diaphragm than the first end face, the positioning boss is convexly arranged on the first end face, the outer peripheral wall connects the outer peripheral edges of the first end face and the second end face, and the first end face is perpendicular to the inner peripheral wall of the center hole.

[0010] Furthermore, the connecting assembly includes a plurality of fixing bolts, the disk body is provided with a plurality of fixing screw holes corresponding to the plurality of fixing bolts, and the plurality of fixing screw holes are evenly arranged around the positioning boss; the intermediate body is provided with a plurality of fixing holes corresponding to the plurality of fixing screw holes, and the plurality of fixing bolts are respectively passed through the corresponding fixing holes and are threadedly connected with the corresponding fixing screw holes.

[0011] Furthermore, the intermediate body includes a carbon fiber tube and connecting flanges respectively fixed at both ends of the carbon fiber tube, the connecting flange is coaxially arranged with the carbon fiber tube, the connecting flange is connected to the disk body through the connecting assembly, and the positioning port is opened on the end face of the connecting flange facing away from the carbon fiber tube.

[0012] Furthermore, the connecting flange includes a flange plate and a mounting shaft protruding from one end of the flange plate, and the mounting shaft is fixedly inserted in the carbon fiber tube; the outer diameter of the flange plate is larger than the outer diameter of the carbon fiber tube, and the flange plate is connected to the plate body through the connecting assembly; the positioning port is arranged on the end face of the flange plate facing away from the carbon fiber tube.

[0013] Furthermore, a middle hole is provided in the middle of the connecting flange, and the middle hole penetrates the flange plate and the mounting shaft along the axial direction of the carbon fiber tube, and the positioning opening is arranged around the outer edge of the middle hole.

[0014] Furthermore, the positioning opening is formed by a groove bottom wall and a groove peripheral wall surrounding the outer peripheral edge of the groove bottom wall, the groove peripheral wall is coaxially arranged with the outer peripheral surface of the flange, and the end surface of the flange facing away from the installation axis is perpendicular to the groove peripheral wall.

[0015] Furthermore, the coupling is connected to the diaphragm via a first connecting bolt group, and the disc body is connected to the diaphragm via a second connecting bolt group.

[0016] Furthermore, the coupling includes a clamping plate and a locking flange sleeve, the clamping plate is connected to the diaphragm through the first connecting bolt group, and the axial hole is provided at the center position of the clamping plate; the locking flange sleeve is sleeved on the clamping plate and connected to the clamping plate through the locking bolt group.

[0017] The present invention also provides a half-coupling of a diaphragm coupling, comprising a coupling, a sleeve end flange and a diaphragm arranged between the coupling and the sleeve end flange, wherein the coupling is provided with an axial hole, the sleeve end flange comprises a disc body and a positioning boss, the positioning boss is convexly arranged at the center of the end surface of the disc body facing away from the coupling; the diaphragm is arranged between the coupling and the disc body.

[0018] The present invention further provides an intermediate body used in conjunction with the half coupling of the diaphragm coupling, wherein both ends of the intermediate body are provided with positioning openings, and the positioning openings are used for plugging and cooperating with the positioning bosses.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The above-mentioned diaphragm coupling has a half coupling with a sleeve end flange having a positioning boss on the side of the diaphragm close to the intermediate body, and a positioning port corresponding to the end of the intermediate body is provided to cooperate with the positioning boss. The positioning boss and the positioning port can improve the coaxiality accuracy of the shaft holes at both ends of the diaphragm coupling after assembly. At the same time, since it is equipped with a sleeve end flange, when assembling, the shaft hole can be made coaxial with the center hole of the sleeve end flange first, and then the intermediate body and the center hole can be made coaxial by the positioning boss and the positioning port, so that the shaft holes at both ends of the diaphragm coupling can be made coaxial, thereby improving the coaxiality accuracy of the shaft holes at both ends of the diaphragm coupling after assembly.

[0021] 2. For the above-mentioned diaphragm coupling, since the intermediate body is not directly connected to the diaphragm and the clearance between the positioning boss and the positioning port is matched, after the diaphragm coupling is assembled, if the runout value is large due to problems such as assembly accuracy, the clearance between the positioning boss and the positioning port can be adjusted by tapping the sleeve end flange to adjust the coaxiality of the diaphragm coupling so that the runout value of the diaphragm coupling meets the standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of a diaphragm coupling according to a preferred embodiment of the present invention;

[0023] Figure 2 for Figure 1 A magnified view of the structure at A;

[0024] Figure 3 for Figure 1 The structural diagram of the intermediate body of the diaphragm coupling shown;

[0025] Figure 4 for Figure 3 A top view of

[0026] Figure 5 for Figure 4 A cross-sectional view of a portion of the structure along line II;

[0027] Figure 6 for Figure 1 An exploded view of the coupling half of the diaphragm coupling shown;

[0028] Figure 7 for Figure 6 A structural diagram from another perspective;

[0029] Figure 8 for Figure 1 Left view of

[0030] Fig. 9 for Figure 8 A cross-sectional view of a portion of the structure along line II-II;

[0031] Fig.10 for Figure 8 A cross-sectional view of a portion of the structure along line III-III;

[0032] In the figure: 100, diaphragm coupling; 10, intermediate body; 11, positioning port; 112, groove bottom wall; 113, groove peripheral wall; 12, carbon fiber tube; 13, connecting flange; 131, flange plate; 132, fixing hole; 134, mounting shaft; 135, intermediate hole; 136, mounting flange; 30, half coupling; 31, coupling; 310, shaft hole; 311, clamping plate; 3112, connecting sleeve; 3113, connecting flange; 3114, first connecting screw hole; 3115, locking screw hole; 3116, receiving hole; 313, locking flange sleeve; 3131, locking hole; 3132, locking sleeve; 3133, locking convex Edge; 3134, locking through hole; 32, sleeve end flange; 321, disk body; 3211, second connecting screw hole; 3212, receiving hole; 3213, first end face; 3214, second end face; 3215, outer peripheral wall; 3216, fixing screw hole; 323, positioning boss; 324, center hole; 33, diaphragm; 332, first through hole; 333, second through hole; 334, wear-resistant sleeve; 34, connecting assembly; 341, fixing bolt; 35, first connecting bolt group; 351, first connecting bolt; 36, locking bolt group; 361, locking bolt; 37, second connecting bolt group; 371, second connecting bolt. DETAILED DESCRIPTION

[0033] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0034] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] See also Figure 1 A preferred embodiment of the present invention provides a diaphragm coupling 100, comprising an intermediate body 10 and two half couplings 30 symmetrically arranged at opposite ends of the intermediate body 10. The two half couplings 30 are respectively used to connect two shafts to be connected (not shown). The intermediate body 10 is used to compensate for the spacing between the two shafts to be connected and transmit torque, so that the two shafts to be connected rotate synchronously.

[0037] Please also see Figures 3 to 5 , both ends of the intermediate body 10 are recessed with positioning openings 11. In this embodiment, the intermediate body 10 includes a carbon fiber tube 12 and two connecting flanges 13 respectively fixed at both ends of the carbon fiber tube 12, and the connecting flanges 13 are made of metal. The connecting flange 13 is coaxially arranged with the carbon fiber tube 12, and the center of the end surface of the connecting flange 13 facing away from the carbon fiber tube 12 is recessed with the positioning opening 11. Specifically, the connecting flange 13 includes a flange 131 and a mounting shaft 134 formed by convexly provided at the middle position of one end of the flange 131. The outer diameter of the flange 131 is greater than the outer diameter of the carbon fiber tube 12, and the end surface of the flange 131 facing away from the carbon fiber tube 12 is recessed to form the positioning opening 11. In this embodiment, the positioning opening 11 is a stop opening, and the positioning opening 11 is surrounded by a groove bottom wall 112 and a groove peripheral wall 113 arranged around the outer periphery of the groove bottom wall 112. The groove peripheral wall 113 is coaxial with the outer peripheral surface of the flange 131, and the groove peripheral wall 113 is perpendicular to the end surface of the flange 131 facing away from the carbon fiber tube 12. In this embodiment, the flange 131 is also provided with a plurality of fixing holes 132, and the plurality of fixing holes 132 are spaced apart along the circumference of the flange 131. The fixing holes 132 are used to connect with the half coupling 30.

[0038] The installation shaft 134 is fixedly inserted into one end of the carbon fiber tube 12. In addition, to ensure that the installation shaft 134 is firmly connected to the carbon fiber tube 12, the installation shaft 134 and the carbon fiber tube 12 can also be connected by rivets (not shown), and multiple rivets are provided and evenly spaced along the circumference of the carbon fiber tube 12.

[0039] A middle hole 135 is also provided in the middle of the connecting flange 13. The middle hole 135 penetrates the flange plate 131 and the mounting shaft 134 along the axial direction of the carbon fiber tube 12, so that the positioning port 11 surrounds the outer edge of the middle hole 135. A mounting flange 136 is also provided in the middle hole 135. The mounting flange 136 is provided in the mounting shaft 134 and surrounds the central axis of the middle hole 135. The mounting flange 136 is used to install a baffle (not shown). The installation of the baffle makes the two ends of the carbon fiber tube 12 sealed.

[0040] When the intermediate body 10 of the prior art carbon fiber coupling is manufactured, its two connecting flanges 13 are usually processed separately and then directly assembled with the carbon fiber tube 12. The two connecting flanges 13 are processed separately, resulting in insufficient coaxiality of the two connecting flanges 13, which in turn results in poor coaxiality accuracy and dynamic balance accuracy of the assembled intermediate body 10, which will affect the coaxiality accuracy and dynamic balance performance of the coupling using the intermediate body 10.

[0041] In this embodiment, after the intermediate body 10 is assembled, the connecting flanges 13 at both ends of the carbon fiber tube 12 are also finely processed to improve the processing accuracy of the intermediate body 10, thereby further improving the coaxiality accuracy and dynamic balance performance of the coupling using the intermediate body 10. Specifically, the processing method of the intermediate body 10 includes the following steps:

[0042] S1, providing an intermediate 10, the intermediate 10 comprising a carbon fiber tube 12 and connecting flanges 13 respectively fixed at two ends of the carbon fiber tube 12;

[0043] S2, clamping the intermediate 10 on a machine tool;

[0044] S3, using a machine tool to fine-process the two connecting flanges 13 so that the two connecting flanges 13 are coaxial. In this embodiment, step S3 specifically includes the following steps:

[0045] S31, fine-machining the outer circumferences of the two connecting flanges 13 by a tool of a machine tool so that the outer circumferences of the two connecting flanges 13 are coaxial;

[0046] S32, taking the outer circumferential surface of the finely machined connecting flange 13 as a reference, the groove circumferential wall 113 of the locating openings 11 on the two connecting flanges 13 is finely machined by the tool of the machine tool, so that the groove circumferential wall 113 of the locating opening 11 is coaxial with the outer circumferential surface of the connecting flange 13; and the end surface of the flange 131 facing away from the carbon fiber tube 12 is machined, so that the end surface of the flange 131 facing away from the mounting axis 134 is perpendicular to the groove circumferential wall 113 of the locating opening 11.

[0047] The processing method of the above-mentioned intermediate 10 also performs fine processing on the connecting flanges 13 at both ends of the carbon fiber tube 12 after the connecting flanges 13 and the carbon fiber tube 12 are assembled into the intermediate 10, and the fine processing of the connecting flanges 13 at both ends of the carbon fiber tube 12 is carried out simultaneously, without the need for multiple clamping in batches, thereby improving the coaxiality and dynamic balancing accuracy of the intermediate 10, so that the coaxiality and dynamic balancing accuracy of the coupling using the intermediate 10 can also be improved accordingly.

[0048] Please also see Figure 2 , Figure 6 and Figure 7 Each half coupling 30 includes a coupling 31, a sleeve end flange 32, and a diaphragm 33 disposed between the coupling 31 and the sleeve end flange 32. The coupling 31 is provided with an axial hole 310. The sleeve end flange 32 includes a disc 321 and a positioning boss 232 protruding from the center of the end surface of the disc 321 facing away from the coupling 31. The disc 321 is connected to the connecting flange 13 of the intermediate body 10 through a connecting assembly 34, and the positioning boss 232 is inserted into the positioning port 11 at the corresponding end.

[0049] Please also see Figures 8 to 10 In this embodiment, the coupling 31 includes a clamping plate 311 and a locking flange sleeve 313. The clamping plate 311 is connected to the diaphragm 33 through a first connecting bolt group 35, and the central position of the clamping plate 311 is provided with the shaft hole 310. Specifically, the clamping plate 311 includes a connecting sleeve 3112 and a connecting flange 3113 protruding on the outer peripheral edge of one end of the connecting sleeve 3112. The connecting sleeve 3112 is arranged to form the shaft hole 310, and the outer peripheral surface of the connecting sleeve 3112 gradually tilts inward from the direction away from the connecting flange 3113. The connecting flange 3113 is connected to the diaphragm 33 through the first connecting bolt group 35. Specifically, a plurality of first connecting screw holes 3114 are provided on the connecting flange 3113 at intervals along the circumferential direction, and a plurality of first through holes 332 are provided on the diaphragm 33 corresponding to the plurality of first connecting screw holes 3114; the first connecting bolt group 35 includes a plurality of first connecting bolts 351, and the plurality of first connecting bolts 351 are respectively passed through the plurality of first through holes 332 and then threadedly connected with the corresponding first connecting screw holes 3114.

[0050] The locking flange sleeve 313 is sleeved on the clamping plate 311 and connected to the clamping plate 311 through the locking bolt group 36. A locking hole 3131 is provided at the center of the locking flange sleeve 313, and the locking flange sleeve 313 is sleeved on the connecting sleeve 3112 of the clamping plate 311 through the locking hole 3131. In this embodiment, the locking flange sleeve 313 includes a locking sleeve 3132 and a locking flange 3133 protruding from the outer peripheral edge of the locking sleeve 3132 close to one end of the diaphragm 33. The locking sleeve 3132 surrounds the locking hole 3131, and the peripheral wall of the locking hole 3131 gradually tilts inward from the direction away from the connecting flange 3113, and the inclination of the peripheral wall of the locking hole 3131 is the same as the inclination of the outer peripheral surface of the connecting sleeve 3112. A plurality of locking through holes 3134 are provided at intervals along the circumferential direction on the locking flange 3133 of the locking flange sleeve 313, and a plurality of locking screw holes 3115 are provided on the connecting flange 3113 of the clamping plate 311 corresponding to the plurality of locking through holes 3134. The locking bolt assembly 36 includes a plurality of locking bolts 361, which are respectively passed through the plurality of locking through holes 3134 provided on one side of the locking flange sleeve 313 and then threadedly connected with the corresponding locking screw holes 3115.

[0051] When the shaft body needs to be installed in the shaft hole 310 on the coupling 31, first, the free end of the shaft body to be installed is inserted into the shaft hole 310 of the connecting sleeve 3112, and the locking bolt 361 of the locking bolt group 36 is screwed to move the locking flange sleeve 313 along the inclined outer peripheral surface of the connecting sleeve 3112 in the direction close to the intermediate body 10. In this process, the inner wall of the connecting sleeve 3112 is elastically deformed to tighten the shaft body through the cooperation between the inclined outer peripheral surface of the connecting sleeve 3112 and the inclined hole peripheral wall of the locking flange sleeve 313, so that the shaft body is installed on the coupling 31. When the shaft body needs to be removed from the diaphragm coupling 100, the locking bolt 361 of the locking bolt group 36 is screwed to move the locking flange sleeve 313 along the inclined outer peripheral surface of the connecting sleeve 3112 in the direction away from the intermediate body 10, so that the connecting sleeve 3112 releases the shaft body.

[0052] In this embodiment, the sleeve end flange 32 is arranged on the side of the diaphragm 33 facing away from the coupling 31, and the sleeve end flange 32 is connected to the diaphragm 33 through the second connecting bolt group 37. Specifically, a plurality of second connecting screw holes 3211 are circumferentially spaced on the disk body 321 of the sleeve end flange 32, and a plurality of second through holes 333 are provided on the diaphragm 33 corresponding to the plurality of second connecting screw holes 3211. The second through holes 333 and the first through holes 332 are alternately arranged on the diaphragm 33, that is, each second through hole 333 is located between two adjacent first through holes 332; the second connecting bolt group 37 includes a plurality of second connecting bolts 371, and the plurality of second connecting bolts 371 are respectively penetrated through the plurality of second through holes 333 and then threadedly connected with the corresponding second connecting screw holes 3211.

[0053] In this embodiment, wear-resistant sleeves 334 are further provided at opposite ends of the first through hole 332 and the second through hole 333, and the first connecting bolt 351 and the second connecting bolt 371 are passed through corresponding wear-resistant sleeves 334. The provision of the wear-resistant sleeves 334 prevents the bolt heads of the first connecting bolt 351 and the second connecting bolt 371 from directly contacting the diaphragm 33 during connection, thereby reducing the wear on the diaphragm 33 during the installation process.

[0054] In addition, in this embodiment, the disc body 321 of the sleeve end flange 32 is further provided with a receiving hole 3212 for receiving the bolt head (not marked) of the first connecting bolt 351, and the connecting flange 3113 of the clamping disc 311 is further provided with a receiving hole 3116 for receiving the bolt head (not marked) of the second connecting bolt 371. During assembly, the bolt head of the first connecting bolt 351 is received in the corresponding receiving hole 3212 on the sleeve end flange 32, and the bolt head of the second connecting bolt 371 is received in the corresponding receiving hole 3116 on the clamping disc 311, which can make the structure of the half coupling 30 more compact, thereby reducing the overall volume of the half coupling 30.

[0055] The disc body 321 of the sleeve end flange 32 has a first end face 3213, a second end face 3214 and an outer peripheral wall 3215 which are arranged opposite to each other. The second end face 3214 is closer to the diaphragm 33 than the first end face 3213, and the outer peripheral wall 3215 connects the outer peripheral edges of the first end face 3213 and the second end face 3214. The positioning boss 323 is convexly arranged on the first end face 3213. In this embodiment, the positioning boss 323 is clearance-matched with the positioning opening 11. Specifically, the assembly clearance between the outer peripheral surface of the positioning boss 323 and the groove peripheral wall 113 of the positioning opening 11 is 0.03-0.05 mm. A center hole 324 is provided at the center of the sleeve end flange 32. The center hole 324 passes through the disc body 321 and the positioning boss 323 along the axial direction of the sleeve end flange 32. The inner circumferential wall of the center hole 324 is coaxially arranged with the outer circumferential surface of the positioning boss 323, and the inner circumferential wall of the center hole 324 is perpendicular to the first end face 3213.

[0056] In this embodiment, the connecting assembly 34 includes a plurality of fixing bolts 341, and the disk body 321 of the sleeve end flange 32 is provided with a plurality of fixing screw holes 3216 corresponding to the plurality of fixing bolts 341, and the plurality of fixing screw holes 3216 are evenly arranged around the positioning boss 323; the plurality of fixing bolts 341 respectively penetrate the corresponding fixing holes 132 on the flange disk 131 and are threadedly connected with the corresponding fixing screw holes 3216, thereby detachably connecting the sleeve end flange 32 and the connecting flange 13 at the corresponding end of the intermediate body 10 together.

[0057] The diaphragm 33 of this embodiment can adopt the stainless steel metal diaphragm of the existing technology, etc., which is elastic. When the unit has axial, radial and angular deviations, the diaphragm 33 produces wavy deformation, thereby compensating for the angular deviation, axial deviation and radial deviation that occur during the connection between shafts.

[0058] When assembling the diaphragm coupling 100, first, connect the clamping plate 311, the diaphragm 33 and the sleeve end flange 32 of the half coupling 30 together, so that the inner circumferential wall of the axial hole 310 of the clamping plate 311 and the inner circumferential wall of the middle hole 135 of the sleeve end flange 32 are coaxial; then, take the outer circumferential surface of the flange plate 131 of the connecting flange 13 of the intermediate body 10 as the positioning reference, so that the outer circumferential wall 3215 of the sleeve end flange 32 and the outer circumferential surface of the flange plate 131 are coaxial, insert the positioning boss 323 of the sleeve end flange 32 into the positioning port 13 of the corresponding end connecting flange 13, and connect it to the connecting flange 13 through the connecting assembly 34. Since the shaft hole 310 is coaxial with the center hole 324 of the sleeve end flange 32, the intermediate body 10 is coaxial with the center hole 324 through the positioning of the positioning boss 323 and the positioning opening 11, so that the shaft holes 310 at both ends of the diaphragm coupling 100 can be coaxial, thereby improving the coaxiality accuracy of the shaft holes 310 at both ends of the diaphragm coupling 100 after assembly.

[0059] However, in the actual assembly process, due to the possible assembly errors or other factors in the assembly process, the coaxiality accuracy of the assembled diaphragm coupling 100 may be reduced. In this embodiment, after the diaphragm coupling 100 is assembled, the diaphragm coupling 100 is also tested for runout. During the runout test, the outer peripheral surface of the connecting flange 13 is used as a reference, and a dial indicator is installed on the inner peripheral wall of the shaft hole 310 and the meter is used to measure the runout value. If the diaphragm coupling 100 is found to deflect to one side, the outer peripheral surface of the positioning boss 323 and the groove peripheral wall 113 of the positioning port 13 can be adjusted by knocking the shaft sleeve end flange 32, so that the diaphragm coupling 100 no longer deflects, and the shaft holes 310 at both ends of the intermediate body 10 can be made coaxial.

[0060] In the above-mentioned diaphragm coupling 100, its half coupling 30 is additionally provided with a sleeve end flange 323 with a positioning boss 323 on the side of the diaphragm 33 close to the intermediate body 10, and the end of the intermediate body 10 is correspondingly provided with a positioning port 11 that cooperates with the positioning boss 323. Through the positioning cooperation between the positioning boss 323 and the positioning port 11, the coaxiality accuracy of the shaft hole 310 at both ends of the diaphragm coupling 100 after assembly can be improved.

[0061] In the above-mentioned diaphragm coupling 100, since the intermediate body 10 is not directly connected to the diaphragm 33, and the positioning boss 323 and the positioning port 11 are clearance-matched, when the diaphragm coupling 100 is assembled, if the run-out value is large due to reasons such as assembly accuracy, the clearance between the positioning boss 323 and the positioning port 11 can be adjusted by tapping the sleeve end flange 32 to adjust the coaxiality of the diaphragm coupling 100 so that the run-out value of the diaphragm coupling 100 meets the standard.

[0062] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A diaphragm coupling, comprising an intermediate body and two half couplings symmetrically arranged at both ends of the intermediate body, characterized in that: Both ends of the intermediate body are recessed with positioning openings; each of the half-couplings includes a coupling, a sleeve end flange and a diaphragm arranged between the coupling and the sleeve end flange, the coupling is provided with an axial hole, the sleeve end flange includes a disc body and a positioning boss, the disc body is connected to the intermediate body through a connecting assembly, the positioning boss is convexly arranged at the center of the end surface of the disc body facing away from the coupling, and the positioning boss is inserted into the positioning opening at the corresponding end; the diaphragm is arranged between the coupling and the disc body.

2. The diaphragm coupling according to claim 1, characterized in that: The positioning opening is a stop opening, and the positioning boss is in clearance fit with the positioning opening.

3. The diaphragm coupling according to claim 2, characterized in that: The assembly clearance between the outer peripheral surface of the positioning boss and the peripheral wall of the groove of the positioning opening is 0.03-0.05 mm.

4. The diaphragm coupling according to claim 1, characterized in that: A center hole is provided at the center of the shaft sleeve end flange, and the center hole penetrates the disc body and the positioning boss along the axial direction of the shaft sleeve end flange.

5. The diaphragm coupling according to claim 4, characterized in that: The outer peripheral surface of the positioning boss is coaxially arranged with the inner peripheral wall of the center hole.

6. The diaphragm coupling according to claim 5, characterized in that: The disk body has a first end face, a second end face and an outer peripheral wall which are arranged opposite to each other. The second end face is closer to the diaphragm than the first end face. The positioning boss is convexly arranged on the first end face. The outer peripheral wall connects the outer peripheral edges of the first end face and the second end face. The first end face is perpendicular to the inner peripheral wall of the center hole.

7. The diaphragm coupling according to claim 1, characterized in that: The connecting assembly includes a plurality of fixing bolts, the disc body is provided with a plurality of fixing screw holes corresponding to the plurality of fixing bolts, and the plurality of fixing screw holes are evenly arranged around the positioning boss; the intermediate body is provided with a plurality of fixing holes corresponding to the plurality of fixing screw holes, and the plurality of fixing bolts are respectively passed through the corresponding fixing holes and are threadedly connected with the corresponding fixing screw holes.

8. The diaphragm coupling according to claim 1, characterized in that: The intermediate body includes a carbon fiber tube and connecting flanges respectively fixed at both ends of the carbon fiber tube, the connecting flange is coaxially arranged with the carbon fiber tube, the connecting flange is connected to the disk body through the connecting assembly, and the positioning port is opened on the end face of the connecting flange facing away from the carbon fiber tube.

9. The diaphragm coupling according to claim 8, characterized in that: The connecting flange includes a flange plate and a mounting shaft protruding from one end of the flange plate, and the mounting shaft is fixedly inserted into the carbon fiber tube; the outer diameter of the flange plate is larger than the outer diameter of the carbon fiber tube, and the flange plate is connected to the plate body through the connecting assembly; the positioning port is arranged on the end face of the flange plate facing away from the carbon fiber tube.

10. The diaphragm coupling according to claim 9, characterized in that: A middle hole is also provided in the middle of the connecting flange. The middle hole penetrates the flange plate and the mounting shaft along the axial direction of the carbon fiber tube. The positioning opening is arranged around the outer edge of the middle hole.

11. The diaphragm coupling according to claim 9, characterized in that: The positioning opening is formed by a groove bottom wall and a groove peripheral wall surrounding the outer peripheral edge of the groove bottom wall. The groove peripheral wall is coaxially arranged with the outer peripheral surface of the flange, and the end surface of the flange facing away from the installation axis is perpendicular to the groove peripheral wall.

12. The diaphragm coupling according to claim 1, characterized in that: The coupling is connected to the diaphragm via a first connecting bolt group, and the disc body is connected to the diaphragm via a second connecting bolt group.

13. The diaphragm coupling according to claim 12, characterized in that: The coupling includes a clamping plate and a locking flange sleeve. The clamping plate is connected to the diaphragm through the first connecting bolt group. The axial hole is provided at the center position of the clamping plate. The locking flange sleeve is sleeved on the clamping plate and connected to the clamping plate through the locking bolt group.

14. A half coupling of a diaphragm coupling, characterized in that: It includes a coupling, a sleeve end flange and a diaphragm arranged between the coupling and the sleeve end flange. The coupling is provided with an axial hole. The sleeve end flange includes a disc body and a positioning boss. The positioning boss is convexly arranged at the center of the end surface of the disc body facing away from the coupling. The diaphragm is arranged between the coupling and the disc body.

15. An intermediate body used in conjunction with the half coupling of the diaphragm coupling according to claim 14, characterized in that: Both ends of the intermediate body are provided with positioning openings, and the positioning openings are used for plugging and matching with the positioning bosses.

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