Diaphragm coupling connected by conical bushing

Abstract

The utility model provides a diaphragm coupling connected by a conical bushing. The diaphragm coupling comprises an input end connecting disc, an output end connecting disc and a diaphragm assembly, the output end connecting disc and the output end connecting disc are both provided with connecting holes; the diaphragm assembly comprises a diaphragm, a conical lining, a diaphragm pressing gasket, a bolt and a locknut, the conical lining comprises a straight barrel part and a conical part, the bolt can be automatically centered during installation through the conical part, the coaxiality of the conical lining, the bolt and a connecting hole in the connecting disc is guaranteed, and the reliability of the diaphragm assembly is improved. The tightness degree of the diaphragm after the conical bushing is completely centered is in the optimal state by controlling the hole position degree when the diaphragm and the connecting disc are machined; in addition, under the overload working condition or the working condition that the diaphragm coupling is used for a long time and is subjected to alternating load, the coaxiality can be better kept through the arrangement of the conical surfaces, the situation that centering deviation is continuously influenced due to micro displacement generated by the conical core lining and the like is avoided, and the reliability and fatigue strength of the whole diaphragm coupling are improved.

Description

Technical Field

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

[0002] Diaphragm couplings are widely used in rail transit and other industrial machinery. The diaphragm assembly of a traditional diaphragm coupling transmits torque through friction between the bolt preload and the input and output drive discs. If the diaphragm assembly is subjected to forces exceeding static friction, it will undergo micro-displacement and become unable to reset, affecting the stiffness of the diaphragm coupling.

[0003] Due to objective factors, ordinary flat bushings can experience some misalignment during assembly, resulting in uneven force applied to the bolts during tightening. During transmission, the bushing and drive plate rely solely on the friction generated by the pre-tightened bolts, leaving a certain gap between the two components. Furthermore, due to vibration or continuous torque output during transmission, the bushing and drive plate experience some micro-displacement. These micro-displacements continuously affect the misalignment between the diaphragm assembly and the drive plate holes. This misalignment is irreversible and increases with age, impacting the fatigue strength of the diaphragm assembly. Utility Model Content

[0004] The purpose of the present utility model is to address the deficiencies in the above-mentioned background technology and to provide a novel diaphragm coupling with a tapered bushing connection, so as to prevent the bolt connection from deflecting after an overload condition and to improve the reliability of the diaphragm coupling.

[0005] In order to achieve the above-mentioned object, the utility model provides a diaphragm coupling connected by a tapered bushing, comprising an input end connection disk, an output end connection disk and a diaphragm assembly;

[0006] The output terminal connection disk and the output terminal connection disk are both provided with connection holes;

[0007] The diaphragm assembly includes a diaphragm, a tapered bushing, a diaphragm compression washer, a bolt, and a lock nut. The diaphragm is provided with a plurality of stacked sheets. The diaphragm is provided with a through-hole. The bolt passes through the through-hole on the diaphragm and the connection hole of the input-end connecting disk / the output-end connecting disk. The lock nut is provided on the other side of the input-end connecting disk / the output-end connecting disk and is connected to the bolt.

[0008] The conical bushing includes a straight cylindrical portion and a conical portion. The outer diameter of the straight cylindrical portion matches the perforation of the diaphragm and is inserted at the perforation position. The maximum outer diameter of the conical portion is larger than the perforation diameter. The inner diameters of the straight cylindrical portion and the conical portion both match the bolt. The connecting holes of the input end connecting disk / the output end connecting disk are both provided with conical countersunk surfaces. The diaphragm pressing gasket cooperates with the conical portion to limit the diaphragm.

[0009] Furthermore, the diaphragm compression gasket is sleeved on the straight cylinder portion and is interference fit with the straight cylinder portion.

[0010] Furthermore, the diaphragm assembly further comprises a bolt washer, which is sleeved on the bolt and is in contact with the diaphragm compression washer.

[0011] Furthermore, the generatrix of the tapered portion is configured as a curve.

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

[0013] The diaphragm coupling connected by the tapered bushing provided by the utility model can achieve an automatic centering effect when the bolt is installed through the tapered surface of the tapered bushing, thereby ensuring the coaxiality of the tapered bushing, the bolt, and the connecting hole on the connecting plate, and can achieve the optimal tightness of the diaphragm after the tapered bushing is fully centered by controlling the position of the holes during the processing of the diaphragm and the connecting plate. In overload conditions or long-term use conditions subject to alternating loads, the provision of the tapered surface can also better maintain the above-mentioned coaxiality, avoiding micro-displacement of the conical bushing and other components that continuously affects the deviation of the centering, thereby improving the reliability and fatigue strength of the entire diaphragm coupling.

[0014] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 for Figure 1 Enlarged view of point A.

[0017] [Description of Reference Numerals]

[0018] 1-Input end connection plate; 2-Output end connection plate; 3-Diaphragm; 4-Tapered bushing; 5-Diaphragm pressing gasket; 6-Bolt gasket; 7-Bolt; 8-Lock nut. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a locking connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 、 Figure 2 As shown, an embodiment of the present invention provides a diaphragm coupling with a tapered bushing connection, comprising an input-end connection disc 1, an output-end connection disc 2, and a diaphragm assembly. The output-end connection disc 1 and the output-end connection disc 2 are both provided with connection holes, which are connected to the diaphragm assembly through the connection holes. The diaphragm assembly enables the input-end connection disc 1 and the output-end connection disc 2 to rotate synchronously and transmit torque.

[0023] The diaphragm assembly consists of a diaphragm 3, a tapered bushing 4, a diaphragm compression washer 5, a bolt washer 6, a bolt 7, and a locknut 8. The diaphragm 3 is composed of multiple stacked sheets and is perforated. Bolts 7 pass through the perforations in the diaphragm 3 and the connection holes of the input / output connection pads 1 and 2, and locknuts 8 are installed on the other side of the input / output connection pads 1 and 2 to secure them.

[0024] In this embodiment, the tapered bushing 4 comprises a straight portion and a tapered portion. The outer diameter of the straight portion matches the perforation of the diaphragm 3 and is inserted into the perforation. The maximum outer diameter of the tapered portion is larger than the diameter of the perforation, limiting the diaphragm 3's first axial position. The inner diameters of both the straight and tapered portions match the bolt 7, allowing the entire tapered bushing 4 to fit over the bolt 7. The connection holes of the input / output connection discs 1 and 2 are both provided with tapered countersunk surfaces, allowing them to mate with the tapered portion and form a secure fit under the preload force of the bolt 7.

[0025] The second axial side of the diaphragm 3 is restrained by a diaphragm compression washer 5. This washer also fits over the straight portion of the tapered bushing 4, creating an interference fit with the straight portion to compress and retain the diaphragm 3. A bolt washer 6 fits over a bolt 7 and contacts the diaphragm compression washer 5 (or the end face of the tapered bushing 4). When the bolt 7 is tightened, the bolt washer 6 compresses the diaphragm compression washer 5, the diaphragm 3, the tapered portion, and so on, forming a secure connection with the input connector 1 and the output connector 2.

[0026] Therefore, the tapered surface provides a self-centering effect when bolt 7 is installed, ensuring the coaxiality of the tapered bushing 4, bolt 7, and the connection holes of the input-end connecting plate 1 / output-end connecting plate 2. Furthermore, by controlling the position of the holes during machining of the diaphragm 3 and the connecting plates, the tightness of the diaphragm 3 is optimized after it is fully centered on the tapered bushing 4. The tapered surface also helps maintain this coaxiality under overload conditions or long-term use subjected to alternating loads, preventing micro-displacements of the conical bushing 4 and other components that could continuously affect alignment, thereby improving the fatigue strength of the entire diaphragm coupling.

[0027] It is worth mentioning that in this embodiment, the diaphragm 3 is sleeved within the straight portion by providing a straight portion. Compared to providing only a tapered portion, this can better prevent the diaphragm 3 from shifting relative to the tapered bushing 4, thereby achieving the aforementioned effect. As a preferred embodiment, the generatrix of the tapered portion in this embodiment is curved. Compared to a straight generatrix, the entire tapered portion can better cooperate with the connection hole, further enhancing the firmness.

[0028] It should also be noted that when the axial dimension of the diaphragm compression gasket 5 is large, the bolt gasket 6 can be omitted, and the bolt 7 can directly contact and compress the diaphragm compression gasket 5, which can also ensure the secure installation of the tapered bushing 4 and diaphragm 3. However, the bolt gasket 6 can better protect the bolts and other components, so it is preferred to provide the bolt gasket 6.

[0029] It should also be noted that the diaphragm 3 itself is also connected in multiple layers by bolts 7. This part itself is a prior art, so its connection structure will not be described in detail in this embodiment.

[0030] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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.

[0031] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A diaphragm coupling connected by a tapered bushing, characterized in that: It comprises an input end connection disk (1), an output end connection disk (2) and a diaphragm assembly; The output terminal connection disk (1) and the output terminal connection disk (2) are both provided with connection holes; The diaphragm assembly comprises a diaphragm (3), a conical bushing (4), a diaphragm pressing gasket (5), a bolt (7) and a lock nut (8); the diaphragm (3) is provided with a plurality of stacked sheets, the diaphragm (3) is provided with a through hole, the bolt (7) passes through the through hole on the diaphragm (3) and the connection hole of the input end connection disk (1) / the output end connection disk (2), and the lock nut (8) is provided on the other side of the input end connection disk (1) / the output end connection disk (2) and is connected to the bolt (7); The conical bushing (4) includes a straight portion and a conical portion. The outer diameter of the straight portion matches the perforation of the diaphragm (3) and is inserted at the perforation position. The maximum outer diameter of the conical portion is larger than the diameter of the perforation. The inner diameters of the straight portion and the conical portion both match the bolt (7). The connection holes of the input end connection plate (1) / the output end connection plate (2) are both provided with conical countersunk surfaces. The diaphragm pressing gasket (5) cooperates with the conical portion to limit the diaphragm (3).

2. The diaphragm coupling with a tapered bushing connection according to claim 1, characterized in that: The diaphragm pressing gasket (5) is sleeved on the straight cylinder portion and is interference fit with the straight cylinder portion.

3. A diaphragm coupling with a tapered bushing connection according to claim 1 or 2, characterized in that: The diaphragm assembly further comprises a bolt washer (6), which is sleeved on the bolt (7) and is in contact with the diaphragm pressing washer (5).

4. The diaphragm coupling with a tapered bushing connection according to claim 1, characterized in that: The generatrix of the tapered portion is arranged as a curve.

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