Diaphragm coupling in self-locking connection mode

Abstract

The utility model provides a diaphragm coupling in a self-locking connection mode. The diaphragm coupling comprises an input end connecting disc, an output end connecting disc and a diaphragm assembly. The diaphragm assembly comprises a diaphragm, a diaphragm bushing, a conical bushing, a conical nut and a diaphragm compression bolt; the cylindrical surface of the conical lining is matched with the connecting hole of the transmission disc, the conical surface of the conical lining is matched with the conical nut, and under the pre-tightening effect of the diaphragm compression bolt, the conical lining is compressed, and meanwhile, the conical lining expands outwards under the action of the inclined surface, so that the conical lining is in interference fit with the connecting hole to form self-locking; meanwhile, the diaphragm can achieve the optimal automatic centering state by controlling the position degree of a diaphragm hole position and the coaxiality of an inner hole and the outer surface of a diaphragm female bushing during machining, so that micro displacement generated by the bushing and a transmission disc due to vibration or continuous torque output in the transmission process is avoided, and the service life of the diaphragm is prolonged. And the reliability and the fatigue strength of the diaphragm coupling are improved.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm coupling technology, and in particular to a diaphragm coupling with a self-locking connection method. Background Technology

[0002] Diaphragm couplings are widely used shaft transmission components in rail transportation and other industrial machinery. Due to manufacturing and assembly errors, a gap inevitably exists between the diaphragm inner bore and the bushing in traditional diaphragm couplings, resulting in a "backlash" in the coupling. The diaphragm assembly transmits torque through friction between the bolt preload and the input / output drive discs via bolts and washers. If the diaphragm assembly is subjected to a load exceeding the static friction force of the connection, micro-displacement will occur, which cannot be corrected, thus affecting the stiffness and system stability of the diaphragm coupling.

[0003] Ordinary flat bushings may experience some misalignment during assembly due to objective factors, leading to uneven stress on the bolts during tightening. During transmission, the washer and transmission disc rely solely on the friction generated by the bolt preload. A certain gap exists between the two components, and vibrations or continuous torque output during transmission can cause slight displacements between the flat bushing and the transmission disc. These slight displacements continuously affect the alignment deviation between the diaphragm assembly holes and the transmission disc holes. This deviation is irreversible and increases with prolonged use, ultimately impacting the fatigue strength of the diaphragm assembly. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of the above-mentioned background technology by providing a solution that ensures zero backlash in the diaphragm coupling and prevents misalignment at the bolt connection under overload conditions through a self-locking conical nut.

[0005] To achieve the above objectives, this utility model provides a diaphragm coupling with a self-locking connection method, including an input end connecting plate, an output end connecting plate, and a diaphragm assembly;

[0006] Both the input end connecting plate and the output end connecting plate are provided with connecting holes, which are used to connect to the diaphragm assembly.

[0007] The diaphragm assembly includes a diaphragm, a diaphragm bushing, a conical bushing, a conical nut, and a diaphragm clamping bolt. The diaphragm consists of multiple stacked diaphragms, each with a through hole. The diaphragm bushing is inserted into the through hole and has a conical surface. The conical surface of the diaphragm bushing matches the inner surface of the conical bushing and the outer surface of the conical nut. The conical bushing is inserted into a connecting hole, and its outer surface is cylindrical and mates with the connecting hole. The conical nut is inserted into the conical bushing, and its outer surface contacts the conical surfaces of the conical bushing and the diaphragm bushing. The diaphragm clamping bolt is inserted into the conical nut and threadedly engages with it. The diaphragm clamping bolt, in conjunction with the conical bushing, clamps and limits the movement of the diaphragm bushing.

[0008] Furthermore, the diaphragm bushing includes a diaphragm mother bushing and a diaphragm daughter bushing. The outer surface of the diaphragm mother bushing is cylindrical and contacts the perforation. The inner surface of the diaphragm mother bushing is conical. The diaphragm daughter bushing is sleeved on the outside of the diaphragm mother bushing.

[0009] Furthermore, the taper of the conical surfaces of the diaphragm bushing, the conical bushing, and the conical nut is equal.

[0010] Furthermore, the diaphragm sub-shroud is located on the first side of the diaphragm, the diaphragm female bushing is provided with a boss located on the second side of the diaphragm, the nut of the diaphragm clamping bolt is in contact with the diaphragm sub-shroud, and the end face of the tapered bushing is in contact with the boss of the diaphragm female bushing.

[0011] Furthermore, the tapered bushing is provided with a ring platform, the outer diameter of which is larger than the diameter of the connecting hole.

[0012] The above-mentioned solution of this utility model has the following beneficial effects:

[0013] The diaphragm coupling with a self-locking connection method provided by this utility model uses the cylindrical surface of the tapered bushing to engage with the connecting hole of the transmission disk, and the tapered surface of the tapered bushing to engage with the tapered nut. Under the pre-tightening action of the diaphragm clamping bolt, the tapered bushing is clamped and expanded outward due to the inclined surface, so as to achieve an interference fit with the connecting hole and form a self-locking state. At the same time, since the diaphragm bushing and the tapered nut also engage with each other through the tapered surface during assembly, the diaphragm can achieve the best state of automatic alignment by controlling the position of the diaphragm hole and the coaxiality of the inner hole and the outer surface of the diaphragm bushing during processing. This avoids the micro-displacement of the bushing and the transmission disk caused by vibration or continuous torque output during transmission, and thus avoids the deviation of the diaphragm hole position and the transmission disk hole position caused by micro-displacement, thereby improving the reliability and fatigue strength of the diaphragm coupling.

[0014] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an enlarged schematic diagram of the diaphragm assembly of this utility model.

[0017] [Explanation of Labels in the Attached Image]

[0018] 1-Input end connection plate; 2-Output end connection plate; 3-Diaphragm; 4-Diaphragm female bushing; 5-Diaphragm sub-bushing; 6-Conical bushing; 7-Conical nut; 8-Diaphragm clamping bolt. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] like Figure 1 , Figure 2 As shown, an embodiment of this utility model provides a diaphragm coupling with a self-locking connection, including an input end connecting plate 1, an output end connecting plate 2, and a diaphragm assembly. Both the input end connecting plate 1 and the output end connecting plate 2 are provided with connecting holes, which are connected to the diaphragm assembly. Thus, the diaphragm assembly enables the input end connecting plate 1 and the output end connecting plate 2 to rotate synchronously and transmit torque.

[0025] The diaphragm assembly includes a diaphragm 3, a diaphragm female bushing 4, a diaphragm sub-bushing 5, a conical bushing 6, a conical nut 7, and a diaphragm clamping bolt 8. The diaphragm 3 consists of multiple stacked diaphragms, and perforations are formed on the diaphragm 3. These perforations allow the diaphragm assembly to be connected to the input connection plate 1 or the output connection plate 2 via the aforementioned other components of the diaphragm assembly.

[0026] Specifically, the diaphragm bushing 4 is inserted into the through hole of the diaphragm 3. The outer surface of the diaphragm bushing 4 is cylindrical and contacts the through hole. The inner surface of the diaphragm bushing 4 is a conical surface with a certain inclination angle, which matches the inner surface of the conical bushing 6 and the outer surface of the conical nut 7. That is, the inner surface of the conical bushing 6 and the outer surface of the conical nut 7 are also conical surfaces with the same inclination angle. The conical bushing 6 is inserted into the connection hole of the input end connection plate 1 or the output end connection plate 2, and transitions with the connection hole through the cylindrical surface of its outer surface. When the conical bushing 6 is installed in place, the inner surface of the conical bushing 6 is nearly continuous with the inner surface of the diaphragm bushing 4. The conical nut 7 is inserted into the conical bushing 6 (inserted from the large end), and the outer surface of the conical nut 7 contacts the inner surfaces of the conical bushing 6 and the diaphragm bushing 4. The diaphragm clamping bolt 8 is inserted into the conical nut 7 and threadedly engaged with it. Under the action of the thread force, the diaphragm clamping bolt 8 exerts a pulling force on the conical nut 7, causing the conical nut 7 to generate a force that compresses the conical bushing 6. As a result, the conical bushing 6 expands due to the internal tightening force, creating an interference fit with the connecting hole, thus converting the conical bushing 6 and the connecting hole into an interference fit to achieve a self-locking effect.

[0027] In this embodiment, the diaphragm sub-shroud 5 is sleeved on the diaphragm mother bushing 4, and the diaphragm mother bushing 4 is press-fitted with the diaphragm mother bushing 4. The diaphragm sub-shroud 5 is located on the first side of the diaphragm 3, and the boss of the diaphragm mother bushing 4 is located on the second side of the diaphragm 3. The combination of the diaphragm sub-shroud 5 and the diaphragm mother bushing 4 limits the position of the diaphragm 3. The nut of the diaphragm clamping bolt 8 is in contact with the diaphragm sub-shroud 5, and the end face of the tapered bushing 6 is in contact with the boss of the diaphragm mother bushing 4. Under the premise of the self-locking of the tapered bushing 6, the limiting effect of the diaphragm mother bushing 4 and the diaphragm sub-shroud 5 can be guaranteed, thereby ensuring the limiting effect of the diaphragm 3. This, in turn, ensures the alignment effect of the perforation of the diaphragm 3 with the connection hole of the input end connection plate 1 or the output end connection plate 2 when subjected to alternating loads for a long time.

[0028] In addition, the tapered nut 7 will also generate a force that compresses the diaphragm bushing 4, causing the diaphragm bushing 4 to expand due to the internal tension force, and to generate an interference fit with the perforation, thereby eliminating the gap between the diaphragm 3 and the diaphragm bushing 4 and achieving zero backlash.

[0029] It should be noted that in this embodiment, a ring platform is also provided on one side of the conical bushing 6. The ring platform creates a limiting effect, so that the conical bushing 6 is accurately positioned during pre-assembly. After the conical nut 7 self-locks, the position of the conical bushing 6 is unique, and it can maintain good contact and limiting effect with the diaphragm bushing 4.

[0030] In summary, the diaphragm coupling with a self-locking connection method provided in this embodiment uses the cylindrical surface of the tapered bushing 6 to engage with the connecting hole of the transmission disc, and the tapered surface of the tapered bushing 6 to engage with the tapered nut 7. Under the pre-tightening action of the diaphragm clamping bolt 8, the tapered bushing 6 is clamped while expanding outward due to the inclined surface, achieving an interference fit with the connecting hole to form a self-locking state. At the same time, during the assembly of the diaphragm 3, since the diaphragm female bushing 4 and the tapered nut 7 also engage with each other through tapered surfaces, the diaphragm can achieve the optimal state of automatic alignment by controlling the position of the diaphragm hole and the coaxiality of the inner hole and outer surface of the diaphragm female bushing 4 during processing. This avoids the micro-displacement of the bushing and the transmission disc caused by vibration or continuous torque output during transmission, and thus avoids the deviation of the diaphragm 3 hole position from the transmission disc hole position due to micro-displacement, improving the reliability and fatigue strength of the diaphragm coupling.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A diaphragm coupling with a self-locking connection method, characterized in that, It includes an input connection plate (1), an output connection plate (2), and a diaphragm assembly; Both the input end connecting plate (1) and the output end connecting plate (2) are provided with connecting holes, which are used to connect to the diaphragm assembly; The diaphragm assembly includes a diaphragm (3), a diaphragm bushing, a conical bushing (6), a conical nut (7), and a diaphragm clamping bolt (8). The diaphragm (3) consists of multiple stacked diaphragms, and a perforation is formed on the diaphragm (3). The diaphragm bushing is inserted into the perforation. The diaphragm bushing has a conical surface, which matches the inner surface of the conical bushing (6) and the outer surface of the conical nut (7). The conical bushing (6) is inserted into the diaphragm clamping bolt (8). The outer surface of the conical bushing (6) is set as a cylindrical surface and mates with the connecting hole. The conical nut (7) is inserted into the conical bushing (6). The outer surface of the conical nut (7) contacts the conical surface of the conical bushing (6) and the diaphragm bushing. The diaphragm clamping bolt (8) is inserted into the conical nut (7) and threadedly mates with the conical nut (7). The diaphragm clamping bolt (8) mates with the conical bushing (6) to clamp and limit the diaphragm bushing.

2. A diaphragm coupling with a self-locking connection method according to claim 1, characterized in that, The diaphragm bushing includes a diaphragm mother bushing (4) and a diaphragm daughter bushing (5). The outer surface of the diaphragm mother bushing (4) is set as a cylindrical surface and contacts the perforation. The inner surface of the diaphragm mother bushing (4) is set as a conical surface. The diaphragm daughter bushing (5) is sleeved on the outside of the diaphragm mother bushing (4).

3. A diaphragm coupling with a self-locking connection method according to claim 1 or 2, characterized in that, The taper of the conical surfaces of the diaphragm bushing, the conical bushing (6), and the conical nut (7) is equal.

4. A diaphragm coupling with a self-locking connection method according to claim 2, characterized in that, The diaphragm sub-shroud (5) is located on the first side of the diaphragm (3), the diaphragm mother bushing (4) is provided with a boss, the boss is located on the second side of the diaphragm (3), the nut of the diaphragm clamping bolt (8) is in contact with the diaphragm sub-shroud (5), and the end face of the conical bushing (6) is in contact with the boss of the diaphragm mother bushing (4).

5. A diaphragm coupling with a self-locking connection method according to claim 1, characterized in that, The tapered bushing (6) is provided with a ring platform, the outer diameter of which is larger than the diameter of the connecting hole.

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