Length-adjustable coupling

Abstract

The utility model discloses a coupling with adjustable length in the technical field of couplings, which comprises two diaphragms and two half couplings, the diaphragms are positioned between the two half couplings, intermediate shafts are also arranged between the two diaphragms, the intermediate shafts comprise a first intermediate shaft and a second intermediate shaft, and the first intermediate shaft and the second intermediate shaft are arranged in parallel. The first intermediate shaft and the second intermediate shaft are connected in an inserted mode, the axis of the first intermediate shaft coincides with the axis of the second intermediate shaft, and the first intermediate shaft can move in the axis direction of the second intermediate shaft so as to change the inserting length. Through the adjustable design of the two intermediate shafts, axial, radial and angular installation errors can be effectively compensated, the centering flexibility of the transmission system is improved, and therefore the installation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coupling technical field, concretely is a length adjustable coupling. BACKGROUND

[0002] The coupling is a mechanical part used for connecting two shafts (the driving shaft and the driven shaft) in different mechanisms to rotate together to transmit torque. The diaphragm coupling is often used to connect the output shaft of the gear box and the input shaft of the generator in the wind turbine to transmit the torque of the gear box to the generator to drive the generator to rotate.

[0003] The length of the intermediate shaft of the diaphragm coupling in the prior art is fixed and cannot be adjusted. This results in that during installation, if the distance between the two shafts does not match the design size of the coupling, it is difficult to accurately match, and the position of the equipment needs to be adjusted or the parts need to be reprocessed, which increases the installation difficulty and cost. SUMMARY

[0004] The utility model discloses a length adjustable coupling, the length of the intermediate shaft of setting adjustable can be adjusted according to the size of the coupling and the distance between the two shafts during installation, which ensures the stability and efficiency of installation.

[0005] The utility model discloses a length adjustable coupling, the length of the intermediate shaft of setting adjustable can be adjusted according to the size of the coupling and the distance between the two shafts during installation, which ensures the stability and efficiency of installation.

[0006] A length adjustable coupling, comprising two diaphragms and two half couplings, the diaphragms are located between the two half couplings, and an intermediate shaft is further arranged between the two diaphragms, the intermediate shaft comprises a first intermediate shaft and a second intermediate shaft, the first intermediate shaft is inserted with the second intermediate shaft, the axis of the first intermediate shaft coincides with the axis of the second intermediate shaft, and the first intermediate shaft can move along the axis direction of the second intermediate shaft to change the insertion length.

[0007] The prior art needs to align the two half couplings during installation of the coupling to ensure that the coupling can work normally, prolong the service life and improve the reliability of the transmission system. However, the alignment requires that the shaft centers of the two half couplings are on the same straight line and close to each other, and the process is relatively complicated. The length of the intermediate shaft of the diaphragm coupling in the prior art is fixed and cannot be adjusted. This results in that during installation, if the distance between the two shafts does not match the design size of the coupling, it is difficult to accurately match, and the position of the equipment needs to be adjusted or the parts need to be reprocessed, which increases the installation difficulty and cost.

[0008] The utility model discloses to solve above-mentioned problem, make coupling including intermediate shaft, intermediate shaft includes first intermediate shaft and second intermediate shaft, through adjusting the relative position and the relationship of first intermediate shaft and second intermediate shaft, change the overall length of intermediate shaft, to adapt the spacing between the shaft of two machines that need to be connected, do not need to specially adjust the position of two machines for the spacing between machines. Can reduce the time of machine adjustment and the difficulty of alignment, thereby speed up the installation speed of coupling between two machines, strengthen the connection compactness between two half couplings. And the adjustable design of intermediate section can effectively compensate the installation error of axial, radial and angular, improve the centering flexibility of transmission system.

[0009] Further, the first intermediate shaft includes a first shaft cylinder, the second intermediate shaft includes a second shaft cylinder, and the second shaft cylinder is provided with a ring groove at an end thereof facing the first shaft cylinder, and the first shaft cylinder can be clamped into the ring groove.

[0010] The surface of the second shaft cylinder is provided with a waist hole, and the second shaft cylinder is provided with a second connecting block at an end thereof close to the first intermediate shaft, and the waist hole and the second connecting block are located on the same straight line.

[0011] The first shaft cylinder further includes a first connecting block, the first connecting block passes through the waist hole and is fixedly connected with the first shaft cylinder, the first connecting block is located at an end of the first shaft cylinder close to the second intermediate shaft, and the first connecting block is provided with a positioning bolt passing therethrough.

[0012] The length of the intermediate shaft is adjustable, which facilitates installation and improves the applicability of the product, but the stability of the intermediate shaft may be reduced. To ensure the overall stability of the intermediate shaft after adjustment while the length of the intermediate shaft is adjustable, a ring groove is formed in the second shaft cylinder, and the first shaft cylinder can be clamped into the ring groove. The connecting blocks are arranged at the ends of the two shaft cylinders, and are fixedly connected by the positioning bolt, so that the two intermediate shafts cannot approach or move away from each other, to ensure that the coupling is stable enough after length adjustment. The first connecting block passes through the waist hole and is fixedly connected with the first shaft cylinder, and the waist hole limits the first connecting block, so that the two intermediate shafts cannot rotate relative to each other. The length of the intermediate shaft can be adjusted, and the intermediate shaft is not prone to loosening and deformation, and the fatigue stress of the diaphragm is not increased, so that the service life of the diaphragm is not shortened or even broken.

[0013] By adjusting the length of the intermediate section and fixing by the bolt, it is ensured that the two half intermediate sections do not slide during operation, thereby ensuring the stability and reliability of torque transmission. And the bolt fixing is simple and reliable in structure.

[0014] Further, the length direction of the waist hole is parallel to the axis direction of the second shaft cylinder, and the first connecting block reciprocates in the waist hole.

[0015] The waist hole is used to pass through the first connecting block, and the length direction of the waist hole is parallel to the axis direction of the second shaft cylinder, so that the adjustable length and the movement path of the first shaft cylinder can be constrained.

[0016] Further, the first shaft cylinder is provided with a protrusion, and the ring groove is provided with a groove capable of matching the protrusion.

[0017] In order to further strengthen the stability of the intermediate shaft, the protrusion on the first shaft cylinder is embedded into the groove on the second shaft cylinder, and the waist hole is matched with the constraint of the first connecting block, so that the relative rotation of the first intermediate shaft and the second intermediate shaft is prevented, the stability of torque transmission is ensured, and the vibration and wear caused by sliding are reduced.

[0018] Further, the first intermediate shaft and the second intermediate shaft are provided with screw holes, and the central axis of the screw hole coincides with the axis of the positioning bolt.

[0019] The screw holes are arranged on the two intermediate shafts, and the positions of the screw holes and the positioning bolt are located on the same straight line, so that the positioning bolt can also connect the screw hole on one intermediate shaft and the connecting block of the other intermediate shaft, and the intermediate shaft has multiple fixing modes.

[0020] Further, the first connecting block is provided with a first connecting hole matched with the positioning bolt, the second connecting block is provided with a second connecting hole matched with the positioning bolt, and the first connecting hole, the second connecting hole and the screw hole are all provided with an inwardly recessed embedded groove capable of accommodating a nut.

[0021] In order to make the scheme small in size and convenient to disassemble and assemble, the inwardly recessed embedded groove is arranged at the positions of the first connecting hole, the second connecting hole and the screw hole to embed the nut, so that the loosening caused by vibration or impact is prevented, the reliability and stability of the connection are improved, and the space occupied by the external nut is reduced.

[0022] Further, the embedded groove further accommodates a flexible gasket.

[0023] In order to reduce the vibration and loosening risk of the bolt during operation, the flexible gasket is further arranged between the embedded groove and the nut.

[0024] In summary, the utility model has the following beneficial effects compared with the prior art:

[0025] 1、The scheme can adjust the length of the intermediate shaft through the two shaft cylinders and the waist hole, prevent the relative rotation of the two shaft cylinders through the waist hole and the protrusion, and ensure the stability and reliability after adjustment through the positioning bolt and the elastic gasket.

[0026] 2, the nut on the coupling is embedded into the surface of the connecting block and the intermediate shaft, which does not hinder the installation and saves space for length adjustment of the intermediate shaft. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In the drawings:

[0028] Figure 1 is an exploded view of the overall structure of the present application;

[0029] Figure 2 is a schematic view of an embodiment of the intermediate shaft of the present application;

[0030] Figure 3 is a schematic view of an embodiment of the intermediate shaft of the present application;

[0031] Figure 4 is a schematic view of the structure of the first intermediate shaft and the second intermediate shaft of the present application;

[0032] Figure 5 is a sectional view of the present application; Figure 2

[0033] Figure 6 is an enlarged view of part A of the present application; Figure 4

[0034] Figure 7 is a schematic view of the structure of the first shaft cylinder and the first connecting block of the present application;

[0035] The names corresponding to the reference signs are: 1, half coupling; 2, diaphragm; 3, intermediate shaft; 301, first intermediate shaft; 302, first shaft cylinder; 303, threaded hole; 304, first connecting hole; 305, first connecting block; 306, second intermediate shaft; 307, second shaft cylinder; 308, ring groove; 309, second connecting block; 310, second connecting hole; 311, recess; 312, protrusion; 313, positioning bolt; 314, waist hole; 315, embedded groove. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application more clear, specific embodiments and the drawings will be further described in detail, the schematic embodiments of the present application and the description are only used to explain the present application, and not as a limitation of the present application.

[0037] Embodiment:

[0038] As Figures 1-7 ​​As shown, a length-adjustable coupling includes two diaphragms 2 and two half couplings 1, the diaphragms 2 are located between the two half couplings 1, and an intermediate shaft 3 is further arranged between the two diaphragms 2, the intermediate shaft 3 includes a first intermediate shaft 301 and a second intermediate shaft 306, the first intermediate shaft 301 is inserted with the second intermediate shaft 306, the axis of the first intermediate shaft 301 coincides with the axis of the second intermediate shaft 306, and the first intermediate shaft 301 can move along the axis direction of the second intermediate shaft 306 to change the insertion length.

[0039] The prior art needs to align the two half couplings 1 when installing the coupling to ensure that the coupling can work normally, prolong the service life and improve the reliability of the transmission system. However, the alignment requires that the shaft centers of the two half couplings 1 are in the same straight line and close to each other, and the process is relatively complicated. The length of the diaphragm 2 coupling intermediate shaft 3 in the prior art is fixed and cannot be adjusted. This leads to the fact that when installing, if the distance between the two shafts does not match the design size of the coupling, it is difficult to accurately match, and additional adjustment of the equipment position or reprocessing of the parts is required, increasing the installation difficulty and cost.

[0040] The utility model discloses to solve the above-mentioned problem, make the coupling include intermediate shaft 3, and the intermediate shaft 3 includes the first intermediate shaft 301 and the second intermediate shaft 306, and the overall length of the intermediate shaft 3 is changed by adjusting the relative position and relationship of the first intermediate shaft 301 and the second intermediate shaft 306, so that the distance between the shafts of the two machines needed to be connected is adapted, and the positions of the two machines do not need to be specially adjusted according to the distance between the machines. The time of machine adjustment and the difficulty of alignment can be reduced, thereby speeding up the installation speed of the coupling between the two machines and strengthening the connection tightness between the two half couplings 1. And the adjustable design of the intermediate section can effectively compensate the installation error in the axial, radial and angular directions, and improve the centering flexibility of the transmission system.

[0041] Furthermore, the first intermediate shaft 301 includes a first shaft cylinder 302, the second intermediate shaft 306 includes a second shaft cylinder 307, the end of the second shaft cylinder 307 facing the first shaft cylinder 302 is provided with a ring groove 308, and the first shaft cylinder 302 can be clamped into the ring groove 308.

[0042] The surface of the second shaft cylinder 307 is provided with a waist hole 314, and the end of the second shaft cylinder 307 close to the first intermediate shaft 301 is provided with a second connecting block 309, and the waist hole 314 and the second connecting block 309 are located on the same straight line.

[0043] The first shaft cylinder 302 further comprises a first connecting block 305, which passes through the waist hole 314 and is fixedly connected with the first shaft cylinder 302, and the first connecting block 305 is located at the end of the first shaft cylinder 302 close to the second intermediate shaft 306, and the first connecting block 305 is provided with a positioning bolt 313 passing through the second connecting block 309.

[0044] The length of the intermediate shaft 3 is adjustable, which facilitates installation and improves the applicability of the product, but the stability of the intermediate shaft 3 may be reduced. In order to ensure the overall stability of the intermediate shaft 3 after adjustment while the length of the intermediate shaft 3 is adjustable, a ring groove 308 is formed on the second shaft cylinder 307, and the first shaft cylinder 302 can be clamped into the ring groove 308. The end of each shaft cylinder is provided with a connecting block, and the connecting blocks are fixedly connected by the positioning bolt 313, so that the two intermediate shafts cannot be relatively close or far away, thereby ensuring that the coupling length after adjustment is stable enough. The first connecting block 305 passes through the waist hole 314 and is fixedly connected with the first shaft cylinder 302, and the waist hole 314 limits the first connecting block 305, so that the two intermediate shafts 3 cannot rotate relative to each other. The present scheme can adjust the length of the intermediate shaft 3 while preventing loosening and deformation, and does not increase the fatigue stress of the diaphragm 2, thereby shortening the service life or even causing the diaphragm 2 to break.

[0045] By adjusting the length of the intermediate section and fixing it with a bolt, it is ensured that the two halves of the intermediate section do not slide during operation, thereby ensuring the stability and reliability of torque transmission. Moreover, the use of a bolt for fixation is simple and reliable.

[0046] Furthermore, the length direction of the waist hole 314 is parallel to the axis direction of the second shaft cylinder 307, and the first connecting block 305 reciprocally moves in the waist hole 314.

[0047] The waist hole 314 is adopted to enable the first connecting block 305 to pass through, and the length direction of the waist hole 314 is parallel to the axis direction of the second shaft cylinder 307, so as to constrain the adjustable length and the movement path of the first shaft cylinder 302.

[0048] Furthermore, the first shaft cylinder 302 is provided with a protrusion 312, and the ring groove 308 is provided with a recess 311 matched with the protrusion 312.

[0049] In order to enable the first connecting block 305 to pass through the waist hole 314 and be fixedly connected with the first shaft cylinder 302, a gap is left between the waist hole 314 and the first connecting block 305. This gap may cause the two shaft cylinders to rotate relative to each other during operation of the coupling, thereby affecting the service life of the coupling.

[0050] In order to further strengthen the stability of the intermediate shaft 3, the protrusion 312 on the first shaft cylinder 302 is embedded in the groove 311 on the second shaft cylinder 307, and the waist hole 314 matches the constraint of the first connecting block 305, which can prevent the first intermediate shaft 301 and the second intermediate shaft 306 from rotating relative to each other, ensure the stability of torque transmission, and reduce vibration and wear caused by sliding.

[0051] Further, the first intermediate shaft 301 and the second intermediate shaft 306 are each provided with a threaded hole 303, and the central axis of the threaded hole 303 coincides with the axis of the positioning bolt 313.

[0052] The threaded hole 303 is provided on the two intermediate shafts 3, and the position of the threaded hole 303 is located on the same straight line as the position of the positioning bolt 313, so that the positioning bolt 313 can also connect the threaded hole 303 on one intermediate shaft 3 and the connecting block of the other intermediate shaft 3, and the intermediate shaft 3 has multiple fixing modes, and in specific use, the fixing mode can be flexibly selected according to the length of the intermediate shaft 3 and the distance between the two connecting blocks.

[0053] Specifically, when the distance between the two half-couplings 1 is large and the distance between the two connecting blocks after adjustment is small, the two connecting blocks are fixed by the positioning bolt 313. When the distance between the two half-couplings 1 is small and the first connecting block 305 after adjustment is close to the flange surface of the second intermediate shaft 306, one positioning bolt 313 can be used to fix the first connecting block 305 and the second intermediate shaft 306, and another positioning bolt 313 can be used to fix the second connecting block 309 and the first intermediate shaft 301.

[0054] Further, the first connecting block 305 is provided with a first connecting hole 304 matched with the positioning bolt 313, and the second connecting block 309 is provided with a second connecting hole 310 matched with the positioning bolt 313, and the first connecting hole 304, the second connecting hole 310 and the threaded hole 303 are each provided with an inwardly recessed embedded groove 315, which can accommodate a nut.

[0055] In order to make the scheme small and convenient to disassemble, the inwardly recessed embedded groove 315 is provided at the positions of the first connecting hole 304, the second connecting hole 310 and the threaded hole 303 to embed the nut, prevent loosening caused by vibration or impact, improve the reliability and stability of the connection, and reduce the space occupied by the external nut.

[0056] Further, the embedded groove 315 also accommodates a flexible gasket.

[0057] In order to reduce the risk of vibration and loosening of the bolt during operation, the scheme further provides a flexible gasket between the embedded groove 315 and the nut.

[0058] The above specific embodiments explain the purpose, technical scheme and beneficial effects of the present application in further detail, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A length-adjustable coupling, comprising two diaphragms (2) and two half-couplings (1), wherein the diaphragms (2) are located between the two half-couplings (1), and an intermediate shaft (3) is further provided between the two diaphragms (2), characterized in that: The intermediate shaft (3) comprises a first intermediate shaft (301) and a second intermediate shaft (306), the first intermediate shaft (301) is inserted with the second intermediate shaft (306), the axis of the first intermediate shaft (301) coincides with the axis of the second intermediate shaft (306), and the first intermediate shaft (301) can move along the axis direction of the second intermediate shaft (306) to change the insertion length.

2. A length adjustable coupling as claimed in claim 1, characterized in that: The first intermediate shaft (301) comprises a first shaft cylinder (302), the second intermediate shaft (306) comprises a second shaft cylinder (307), the end of the second shaft cylinder (307) facing the first shaft cylinder (302) is provided with a ring groove (308), and the first shaft cylinder (302) can be clamped into the ring groove (308); the surface of the second shaft cylinder (307) is provided with a waist hole (314), the second shaft cylinder (307) is provided with a second connecting block (309) close to the end of the first intermediate shaft (301), the waist hole (314) and the second connecting block (309) are located on the same line; the first shaft cylinder (302) further comprises a first connecting block (305), the first connecting block (305) passes through the waist hole (314) and is fixedly connected with the first shaft cylinder (302), the first connecting block (305) is located at the end of the first shaft cylinder (302) close to the second intermediate shaft (306), and the first connecting block (305) and the second connecting block (309) are provided with a positioning bolt (313) passing therethrough.

3. A length adjustable coupling as claimed in claim 2, characterized in that: The length direction of the waist hole (314) is parallel to the axis direction of the second shaft cylinder (307), and the first connecting block (305) reciprocally moves in the waist hole (314).

4. A length adjustable coupling as claimed in claim 2, characterized in that: The first shaft cylinder (302) is provided with a protruding block (312), and the ring groove (308) is provided with a recess (311) matched with the protruding block (312).

5. A length adjustable coupling as defined in claim 2 wherein: The first intermediate shaft (301) and the second intermediate shaft (306) are both provided with a screw hole (303), and the central axis of the screw hole (303) coincides with the axis of the positioning bolt (313).

6. A length adjustable coupling as claimed in claim 5, characterized in that: The first connecting block (305) is provided with a first connecting hole (304) matched with the positioning bolt (313), the second connecting block (309) is provided with a second connecting hole (310) matched with the positioning bolt (313), and the first connecting hole (304), the second connecting hole (310) and the screw hole (303) are all provided with an inner recessed embedded groove (315) capable of accommodating a nut.

7. A length adjustable coupling as claimed in claim 6, characterized in that: The embedded groove (315) further accommodates a flexible gasket.

Images