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CN-121977024-A - Double-diaphragm coupler capable of randomly adjusting axial distance in certain range

CN121977024ACN 121977024 ACN121977024 ACN 121977024ACN-121977024-A

Abstract

The invention relates to a double-diaphragm coupler capable of randomly adjusting axial distance in a certain range. The invention comprises a first transfer shaft, a second transfer shaft, a driving shaft, a driven shaft and a driven shaft flange, wherein a first lamination assembly is arranged between the driving shaft flange and the first flange in an abutting mode, the second end of the first transfer shaft is provided with a shaft hole along the axial direction, an inner spline is arranged in the shaft hole, an outer spline matched with the inner spline is arranged on the periphery of the first end of the second transfer shaft, a second flange is arranged at the second end of the second transfer shaft, a limiting structure is arranged on the second transfer shaft, the driving shaft is provided with a driving shaft flange, the driving shaft flange is connected with the first flange, and a second lamination assembly is arranged between the driving shaft flange and the first flange in an abutting mode, and the driven shaft is provided with the driven shaft flange which is connected with the second flange and is in an abutting mode between the driven shaft flange and the second lamination assembly. According to the invention, the axial distance of the coupler can be randomly regulated within a certain range according to the actual axial distance, excessive compression and pulling up of the diaphragm can not be caused, and the effect of protecting the diaphragm coupler is achieved.

Inventors

  • BIAN LINGYAN
  • YANG WENBO
  • CHEN KE

Assignees

  • 无锡创明传动工程有限公司

Dates

Publication Date
20260505
Application Date
20260309

Claims (6)

  1. 1. A double diaphragm coupling with an axial distance that can be arbitrarily adjusted within a certain range, comprising: The first adapter shaft (1) comprises a first end and a second end which are axially and oppositely arranged, wherein the first end of the first adapter shaft (1) is provided with a first flange (11), the second end of the first adapter shaft (1) is axially provided with a shaft hole (12), and the shaft hole (12) is provided with an internal spline (13); The second transfer shaft (2) comprises a first end and a second end which are axially and oppositely arranged, an external spline (21) matched with the internal spline (13) is arranged on the periphery of the first end of the second transfer shaft (2), a second flange (23) is arranged at the second end of the second transfer shaft (2), and a limiting structure (22) is arranged on the second transfer shaft (2); The driven shaft (3) is provided with a driven shaft flange (31), the driven shaft flange (31) is connected with the first flange (11), and a first lamination assembly (32) is abutted between the driven shaft flange and the first flange; the driving shaft (4) is provided with a driving shaft flange (41), the driving shaft flange (41) is connected with the second flange (23), and a second lamination assembly (42) is abutted between the driving shaft flange and the second flange; The axial distance of the coupler is adjustable within a preset range by changing the axial matching position of the external spline (21) and the internal spline (13), and the minimum spline matching length of the first adapter shaft (1) and the second adapter shaft (2) is limited by the limiting structure (22).
  2. 2. A double diaphragm coupling with an axial distance that can be adjusted at will in a certain range according to claim 1, characterized in that the limiting structure (22) comprises an annular step limiting surface that is arranged on the outer periphery of the second transfer shaft (2), and that the annular step limiting surface can abut against the end surface of the second end of the first transfer shaft (1) to limit the maximum insertion depth of the second transfer shaft (2) relative to the first transfer shaft (1).
  3. 3. A double diaphragm coupling with an axial distance that can be adjusted at will in a range according to claim 1, characterized in that a first mating assembly (5 a) is provided between the driven shaft flange (31) and the first flange (11) for adjusting the amount of pre-load of the first lamination assembly (32).
  4. 4. A double diaphragm coupling with an axial distance that can be adjusted at will within a certain range according to claim 3, characterized in that a second mating assembly (5 b) is provided between the drive shaft flange (41) and the second flange (23) for adjusting the amount of assembly pre-load of the second lamination assembly (42).
  5. 5. A double diaphragm coupling with an axial distance that can be adjusted arbitrarily within a certain range according to claim 4, characterized in that the first mating component (5 a) and/or the second mating component (5 b) comprises a bolt (51) and a self-locking nut (52) and a washer (53) that mate with the bolt (51), respectively.
  6. 6. A double diaphragm coupling with an axial distance that can be adjusted arbitrarily within a certain range according to claim 1, characterized in that the internal spline (13) and the external spline (21) are fitted by involute spur or rectangular splines.

Description

Double-diaphragm coupler capable of randomly adjusting axial distance in certain range Technical Field The invention relates to the technical field of diaphragm couplings, in particular to a double-diaphragm coupling capable of randomly adjusting axial distance within a certain range. Background The diaphragm coupler is widely applied to the fluid machinery industry and applied to the professional fields of pumps, fans, compressors and the like. The function of the diaphragm coupling is to connect the drive shaft and the driven shaft, thereby transmitting torque from the drive side to the driven side. However, during the application of the coupling, it is often found that the actual shaft head distance between the driving shaft and the driven shaft does not match the designed distance, or that frequent adjustment of the shaft head distance is required on site to meet the matching requirements of different units. The coupler of the existing design can bear extra stress in the operation process due to the difference between the theoretical value and the actual value of the shaft head distance, so that the service life of the coupler is shortened, and the membrane, the bolt and the like are easy to damage. Disclosure of Invention Therefore, the double-diaphragm coupler provided by the invention can be used for arbitrarily adjusting the axial distance in a certain range, and the axial distance of the coupler can be arbitrarily adjusted in a certain range according to the actual axial distance under the condition that the actual axial distance between a driving shaft and a driven shaft of the diaphragm coupler is not consistent with the design distance, so that the excessive compression and the pulling up of the diaphragm can not be caused, and the effect of protecting the diaphragm coupler can be realized. In order to solve the technical problems, the present invention provides a double-diaphragm coupling capable of arbitrarily adjusting an axial distance within a certain range, comprising: The first connecting shaft comprises a first end and a second end which are axially and oppositely arranged, the first end of the first connecting shaft is provided with a first flange, the second end of the first connecting shaft is axially provided with a shaft hole, and the shaft hole is provided with an internal spline; the second transfer shaft comprises a first end and a second end which are axially and oppositely arranged, an external spline matched with the internal spline is arranged on the periphery of the first end of the second transfer shaft, a second flange is arranged at the second end of the second transfer shaft, and a limiting structure is arranged on the second transfer shaft; The driven shaft (3) is provided with a driven shaft flange (31), the driven shaft flange (31) is connected with the first flange (11), and a first lamination assembly (32) is abutted between the driven shaft flange and the first flange; The driving shaft (4) is provided with a driving shaft flange (41), the driving shaft flange (41) is connected with the second flange (23) and is abutted against a second lamination assembly (42), wherein the axial distance of the coupler is adjustable within a preset range by changing the axial matching position of the external spline and the internal spline, and the minimum spline matching length of the first adapter shaft and the second adapter shaft is limited by the limiting structure. In one embodiment of the present invention, the limiting structure includes an annular step limiting surface disposed on an outer periphery of the second adapting shaft, where the annular step limiting surface can abut against an end surface of the second end of the first adapting shaft, so as to limit a maximum insertion depth of the second adapting shaft relative to the first adapting shaft. In one embodiment of the invention, a first mating assembly is provided between the driven shaft flange and the first flange for adjusting the amount of assembly preload of the first lamination assembly. In one embodiment of the invention, a second mating assembly is provided between the drive shaft flange and the second flange for adjusting the amount of assembly preload of the second lamination assembly. In one embodiment of the invention, the first mating assembly and/or the second mating assembly comprises a bolt and a self-locking nut and washer respectively mated with the bolt. In one embodiment of the present invention, the internal spline and the external spline are mated by involute spur or rectangular splines. Compared with the prior art, the technical scheme of the invention has the following advantages: According to the double-diaphragm coupler capable of randomly adjusting the axial distance in a certain range, when the actual axial distance between the driving shaft and the driven shaft of the double-diaphragm coupler is not consistent with the design distance, the axial distance is randomly adjusted in a certa