Diaphragm type coupling

Abstract

The utility model relates to the technical field of couplings, in particular to a diaphragm type coupler which comprises a main shaft sleeve and an auxiliary shaft sleeve, a first diaphragm is arranged between the main shaft sleeve and the auxiliary shaft sleeve, and gaps are arranged between the first diaphragm and the main shaft sleeve and between the first diaphragm and the auxiliary shaft sleeve. A coupling assembly is arranged between the main shaft sleeve and the auxiliary shaft sleeve. The coupling assembly comprises a connecting shaft, and first diaphragms are coaxially fixed to the two ends of the connecting shaft correspondingly. A main shaft sleeve and an auxiliary shaft sleeve are arranged at the two ends of the connecting shaft respectively, fixing assemblies are arranged between the main shaft sleeve and the auxiliary shaft sleeve and the corresponding first diaphragms at the two ends, and the surfaces of the first diaphragms do not make contact with the surfaces of the corresponding main shaft sleeve and the auxiliary shaft sleeve respectively. A second diaphragm is arranged at the center end of the connecting shaft, a pressing plate is arranged between the second diaphragm and the first diaphragm, one end of the pressing plate is fixed to the first diaphragm, and the other end of the pressing plate is spaced from the second diaphragm and does not make contact with the second diaphragm. The diaphragm coupling solves the technical problems that the diaphragm coupling is suitable for a coupling shaft with a heavy load, and permanent deformation of the diaphragm is reduced.

Description

Technical Field

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

[0002] A diaphragm coupling primarily consists of a metal diaphragm assembly (diaphragm), a half-coupling, an intermediate section, a clamping element, bolts, a locknut, and washers. The metal diaphragm is a key component of the flexible coupling. It is composed of a number of thin metal diaphragms stacked together to form a diaphragm assembly, through which torque and motion are transmitted. The diaphragm coupling operates by transmitting the coupling's torque to the diaphragm assembly via circumferentially spaced main torque transmission bolts. The torque is then transmitted from the diaphragm assembly to the intermediate section via bolts, and then outputted by the diaphragm assembly, bolts, and half-coupling at the other end. The diaphragm coupling compensates for relative displacement between the two connected shafts through the elastic deformation of the diaphragm.

[0003] The diaphragm in the existing diaphragm coupling can bend, so it can withstand large deviations, including angular, axial and radial deviations. However, since the diaphragm itself is relatively thin, it cannot withstand large loads. Moreover, under local loads, the diaphragm may form local depressions, affecting the working performance of the diaphragm coupling.

[0004] The Chinese utility model patent, entitled "A Double Diaphragm Flange Coupling," with publication number CN220015866U, has been published. The patent includes an intermediate block connected at both ends to a diaphragm sleeve, which holds a diaphragm. The other end of the diaphragm sleeve is connected to a flange block, which is provided with a shaft locking hole. This utility model increases the coupling's torsional capacity through the combination of the flange and the double diaphragm, resulting in a coupling with high torque transmission and wide applicability.

[0005] Although the utility model can transmit a large torque through the double diaphragms, since the diaphragms themselves are relatively thin, the torque they can withstand has a threshold value, making it difficult to significantly increase the transmitted torque. Utility Model Content

[0006] The purpose of the present application is to provide a diaphragm coupling, which solves the technical problem that the diaphragm coupling is suitable for couplings with heavier loads and reduces permanent deformation of the diaphragm.

[0007] In order to solve the above technical problems, the solution adopted by this application is as follows:

[0008] A diaphragm coupling comprises a main shaft sleeve and a secondary shaft sleeve. A diaphragm 1 is arranged between the main shaft sleeve and the secondary shaft sleeve, and a distance is set between the diaphragm 1 and the main shaft sleeve and the secondary shaft sleeve.

[0009] Preferably, a coupling assembly is provided between the main shaft sleeve and the secondary shaft sleeve.

[0010] Preferably, the coupling assembly includes a connecting shaft, and diaphragms are coaxially fixed to both ends of the connecting shaft.

[0011] Preferably, a main shaft sleeve and a secondary shaft sleeve are respectively provided at both ends of the connecting shaft, and a fixing component is provided between the main shaft sleeve, the secondary shaft sleeve and the corresponding diaphragm 1 at both ends, and the surface of the diaphragm 1 does not contact the surface of the corresponding main shaft sleeve and secondary shaft sleeve.

[0012] Preferably, a diaphragm 2 is provided at the central end of the connecting shaft, a pressure plate is provided between the diaphragm 2 and the diaphragm 1, one end of the pressure plate is fixed on the diaphragm 1, and the other end of the pressure plate is spaced apart from the diaphragm 2 without contact.

[0013] Preferably, a plurality of notches are provided on the connecting shaft, and the notches are evenly arranged along the axial direction of the connecting shaft.

[0014] Preferably, adjacent notches on the connecting shaft are respectively arranged on both sides of the axial direction of the connecting shaft, and the notches are staggered along the axial direction of the connecting shaft.

[0015] Preferably, the fixing assembly includes fixing bolts and nuts, the main shaft sleeve and the corresponding diaphragm are provided with fixing bolts, and the secondary shaft sleeve and the corresponding diaphragm are also provided with fixing bolts.

[0016] Preferably, the main shaft sleeve and the auxiliary shaft sleeve are respectively threadedly connected to their corresponding fixing bolts, and nuts are threadedly fixed on the threaded ends of the fixing bolts passing through the two shaft sleeves.

[0017] Preferably, one end of a fixing column is fixedly connected to the surface of the first diaphragm, and circular grooves are respectively provided on the surfaces of the main shaft sleeve and the auxiliary shaft sleeve.

[0018] Preferably, the circular grooves on the main shaft sleeve and the auxiliary shaft sleeve are respectively oriented toward the surface of the corresponding diaphragm one, and the circular grooves are sleeved and matched with the fixing columns provided on the surface of the corresponding diaphragm one.

[0019] Preferably, at least two fixing components are evenly arranged on the diaphragm 1, the main shaft sleeve and the auxiliary shaft sleeve, and the fixing components are arranged along the circumference of the axis of the shaft sleeve.

[0020] Preferably, two diaphragms 2 are symmetrically arranged in the middle of the connecting shaft, and each diaphragm 2 matches and corresponds to the diaphragm 1 at one end of the connecting shaft.

[0021] The technical solution of this application has at least the following advantages and beneficial effects:

[0022] In the present invention, by providing a double diaphragm, each diaphragm corresponds to a shaft sleeve, thereby increasing the transmitted torque while also simultaneously offsetting the offset displacement from two different sources, thereby increasing the offset compensation fault tolerance during the coupling process;

[0023] In the present invention, by arranging another layer of diaphragm between the double diaphragms, the double diaphragm allows the first layer of diaphragm to bend and deform significantly when subjected to a large load. In order to prevent the first layer of diaphragm from being permanently deformed after high-intensity bending, the second diaphragm can reset the first layer of diaphragm through its own bending elastic force, thereby avoiding the first layer of diaphragm from being concave and deformed, and improving the working efficiency of the coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view structural schematic diagram of the present utility model.

[0025] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model.

[0026] Figure 3 It is a schematic diagram of the top structure of the utility model.

[0027] Figure 4 It is a schematic cross-sectional structural diagram of the medium pressure plate of the present invention.

[0028] Figure 5 It is a structural diagram of the present utility model.

[0029] In the figure: 1-main shaft sleeve, 2-secondary shaft sleeve, 3-coupling assembly, 301-connecting shaft, 302-fixing bolt, 303-nut, 304-fixing column, 305-extension column, 306-pressure plate, 307-cut groove, 4-diaphragm 1, 5-diaphragm 2. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. Terms such as "center," "upper," "lower," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the figures, or the positions or locations in which the product is typically placed when in use. These terms are used solely for ease of description and simplification of the present application. They do not indicate or imply that the device or component referred to must have a specific position, be constructed, or operate in a specific orientation, and are not to be construed as limiting the present application. It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "mounted," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections or indirect connections through an intermediary; or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application in specific contexts.

[0032] Example

[0033] Please refer to Figure 1-Figure 5 The utility model provides a diaphragm coupling, including a main shaft sleeve 1, a secondary shaft sleeve 2, a coupling assembly 3, a diaphragm 1 4, and a diaphragm 2 5.

[0034] Furthermore, the main shaft sleeve 1 is sleeved with the driving shaft of the external device, and the secondary shaft sleeve 2 is sleeved with the driven shaft of the external device. A coupling assembly 3 is connected between the main shaft sleeve 1 and the secondary shaft sleeve 2 for connecting the two shaft sleeves to realize the coupling function.

[0035] The coupling assembly 3 is sleeved with a diaphragm 1 4 and a diaphragm 2 5 .

[0036] Furthermore, the coupling assembly 3 includes a connecting shaft 301 , a fixing member, an extension column 305 , and a pressure plate 306 .

[0037] Specifically, diaphragms 4 are coaxially fixed to both ends of the connecting shaft 301, and main shaft sleeves 1 and auxiliary shaft sleeves 2 are respectively provided at both ends of the connecting shaft 301. A fixing component is provided between the main shaft sleeve 1 and the auxiliary shaft sleeve 2 and the corresponding diaphragms 4 at both ends. The fixing component is used to connect the corresponding shaft sleeves and diaphragms 4, and the surfaces of the diaphragms 4 are respectively arranged to face the surfaces of the corresponding main shaft sleeve 1 and auxiliary shaft sleeve 2, and are separated by a certain distance, and the two surfaces will not contact.

[0038] Preferably, when the coupling is connected to the drive shaft of the external device, due to installation errors or vibration errors caused by the operation of the equipment, the drive shafts of the two coupled external devices are not coaxial when the coupling is coupled, resulting in offset, which affects the coupling function. At this time, the offset of the drive shaft will drive the diaphragm to bend elastically, and the deformation of the diaphragm will compensate for the offset displacement of the two connected shafts to ensure normal coupling.

[0039] Each shaft sleeve is matched with a diaphragm 4, so that the external devices corresponding to the two shaft sleeves can be offset by a separate diaphragm 4, so that even if the two external devices vibrate and deviate at the same time, the offset displacements from two different sources can be synchronously offset by the diaphragm 4.

[0040] In addition, two diaphragms 2 5 are symmetrically arranged in the middle of the connecting shaft 301. The diaphragm 2 5 is coaxially fixed to the outside of the connecting shaft 301. Each diaphragm 2 5 matches the diaphragm 1 4 at one end of the connecting shaft 301. The surface of the diaphragm 1 4 is fixedly connected to one end of the extension column 305, and the other end of the extension column 305 is fixedly connected to the pressure plate 306. There is a distance between the pressure plate 306 and the diaphragm 2 5, and they do not contact each other.

[0041] Preferably, when the coupling is working normally, when facing a small offset of the external equipment, the coupling only compensates for the offset through diaphragm 1 4. At this time, when diaphragm 1 4 is bent and deformed, the pressure plate 306 connected to diaphragm 1 4 will also undergo relative displacement, but the displacement at this time will not cause the pressure plate 306 to contact diaphragm 2 5; when facing a large offset of the external equipment (such as heavy equipment), it is difficult for the coupling to compensate for the offset for a long time only through diaphragm 1 4. Diaphragm 1 4 will gradually deform under high-intensity bending deformation, resulting in depressions on the diaphragm surface, reducing its working performance. Therefore, when the deformation of diaphragm 1 4 is too large, it will drive the pressure plate 306 to undergo a large displacement, thereby causing the pressure plate 306 to abut against diaphragm 2 5. Diaphragm 2 5 reduces the bending deformation of diaphragm 1 4 through its own bending deformation, thereby preventing diaphragm 1 4 from being subjected to excessive load and affecting its service life. The combined effect of diaphragm 1 4 and diaphragm 2 5 also allows the coupling to be applied to couplings of external equipment of larger specifications.

[0042] Furthermore, a plurality of notch grooves 307 are provided on the shaft of the connecting shaft 301. The notch grooves 307 are semicircular notches. The notch grooves 307 are evenly arranged along the axial direction of the connecting shaft 301. The adjacent notch grooves 307 on the connecting shaft 301 are respectively provided on both sides of the axial direction of the connecting shaft 301, so that the notch grooves 307 are staggered along the axial direction of the connecting shaft 301.

[0043] Preferably, the connecting shaft 301 itself is a rigid structure that is difficult to bend and deform, thus affecting the diaphragm 1-4 fixed thereon. Therefore, a plurality of notches 307 are provided on the connecting shaft 301. The staggered semicircular notches 307 reduce the connection diameter of the rigid structure in the connecting shaft 301, thereby allowing the connecting shaft 301 to bend and deform, thereby matching the bending deformation of the diaphragm 1-4.

[0044] Please refer to Figure 2 In this embodiment, the fixing assembly includes a fixing bolt 302 , a nut 303 , and a fixing column 304 .

[0045] Specifically, the fixing assembly includes a fixing bolt 302 and a nut 303. The main shaft sleeve 1 and the corresponding diaphragm 4 are provided with a fixing bolt 302, and the secondary shaft sleeve 2 and the corresponding diaphragm 4 are also provided with a fixing bolt 302. The main shaft sleeve 1 and the secondary shaft sleeve 2 are respectively threadedly connected with their corresponding fixing bolts 302, and the fixing bolt 302 passes through the threaded end of the two shaft sleeves and is threadedly fixed with a nut 303.

[0046] Both sleeves can be separated from the diaphragm 1-4 by loosening the fixing bolts 302 and the nuts 303, thereby replacing the two sleeves that are prone to wear; and tightening the fixing bolts 302 and the nuts 303 can fix the sleeves on the diaphragm 1-4.

[0047] One end of the fixing column 304 is also fixedly connected to the surface of the diaphragm 4, and circular grooves are respectively provided on the surfaces of the main shaft sleeve 1 and the secondary shaft sleeve 2. The circular grooves on the main shaft sleeve 1 and the secondary shaft sleeve 2 are respectively facing the corresponding surfaces of the diaphragm 4, and the circular grooves are respectively matched with the fixing columns 304 provided on the surfaces of the corresponding diaphragm 4.

[0048] Among them, the length of the fixing column 304 is fixed, so it can limit the distance between the sleeve and the diaphragm 4, and the fixed circular groove on the sleeve is a positioning slot. When the sleeve is connected to the diaphragm, the fixing column 304 can position the sleeve to ensure the coaxiality of the diaphragm and the sleeve, and ensure the accuracy of the centering of the two connected shafts to avoid excessive axial stress and reduce the working performance of the coupling.

[0049] It is worth noting that at least two fixing components are evenly arranged on the main shaft sleeve 1 and the corresponding diaphragm 1 4, and on the secondary shaft sleeve 2 and the corresponding diaphragm 1 4. The fixing components are arranged along the axis of the shaft sleeve. This ensures that when the diaphragm 1 4 is subjected to external load, the bending deformation of the diaphragm 1 4 is evenly distributed on the diaphragm.

[0050] Thus far, various embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details known in the art have been omitted. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A diaphragm coupling, comprising a main shaft sleeve (1) and a secondary shaft sleeve (2), wherein a diaphragm 1 (4) is provided between the main shaft sleeve (1) and the secondary shaft sleeve (2), and a distance is provided between the diaphragm 1 (4) and the main shaft sleeve (1) and the secondary shaft sleeve (2), characterized in that ； A coupling assembly (3) is provided between the main shaft sleeve (1) and the secondary shaft sleeve (2); The coupling assembly (3) includes a connecting shaft (301), and a diaphragm (4) is coaxially fixed to both ends of the connecting shaft (301); A main shaft sleeve (1) and a secondary shaft sleeve (2) are respectively provided at both ends of the connecting shaft (301); a fixing assembly is provided between the main shaft sleeve (1) and the secondary shaft sleeve (2) and the corresponding diaphragm 1 (4) at both ends; the surface of the diaphragm 1 (4) does not contact the surface of the corresponding main shaft sleeve (1) and the secondary shaft sleeve (2); The center end of the connecting shaft (301) is provided with a diaphragm 2 (5), and a pressure plate (306) is provided between the diaphragm 2 (5) and the diaphragm 1 (4). One end of the pressure plate (306) is fixed on the diaphragm 1 (4), and the other end of the pressure plate (306) is spaced apart from the diaphragm 2 (5) so as not to contact the diaphragm 2.

2. A diaphragm coupling according to claim 1, characterized in that: The connecting shaft (301) is provided with a plurality of notch grooves (307), and the notch grooves (307) are evenly arranged along the axial direction of the connecting shaft (301); The adjacent notches (307) on the connecting shaft (301) are respectively arranged on both sides of the axial direction of the connecting shaft (301), and the notches (307) are staggered along the axial direction of the connecting shaft (301).

3. A diaphragm coupling according to claim 1, characterized in that: The fixing assembly includes a fixing bolt (302) and a nut (303), the main shaft sleeve (1) and the corresponding diaphragm 1 (4) are provided with a fixing bolt (302), and the auxiliary shaft sleeve (2) and the corresponding diaphragm 1 (4) are also provided with a fixing bolt (302); The main shaft sleeve (1) and the auxiliary shaft sleeve (2) are respectively threadedly connected to their corresponding fixing bolts (302), and the fixing bolts (302) pass through the threaded ends of the two shaft sleeves and are threadedly fixed with nuts (303).

4. A diaphragm coupling according to claim 1, characterized in that: One end of the fixing column (304) is fixedly connected to the surface of the diaphragm (4), and circular grooves are respectively provided on the surfaces of the main shaft sleeve (1) and the auxiliary shaft sleeve (2); The circular grooves on the main shaft sleeve (1) and the auxiliary shaft sleeve (2) are respectively oriented toward the surface of the corresponding diaphragm one (4), and the circular grooves are sleeve-matched with the fixing columns (304) provided on the surface of the corresponding diaphragm one (4).

5. The diaphragm coupling according to claim 1, characterized in that: At least two fixing components are evenly arranged on the diaphragm 1 (4) and the main shaft sleeve (1) and the auxiliary shaft sleeve (2), and the fixing components are arranged along the axis circumference of the shaft sleeve.

6. A diaphragm coupling according to claim 1, characterized in that: Two diaphragms 2 (5) are symmetrically arranged in the middle of the connecting shaft (301), and each diaphragm 2 (5) matches and corresponds to the diaphragm 1 (4) at one end of the connecting shaft (301).

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