A flexible coupling

Abstract

The utility model discloses a kind of flexible couplings, belong to coupling technical field, including spacer and the flange plate being equipped in its both ends, flange plate outside is connected with corresponding shaft sleeve by bolt, diaphragm group is equipped between shaft sleeve and flange plate;Flange plate is equipped with shaft end limiting piece, shaft sleeve is equipped with shaft end sealing piece;Shaft end sealing piece side has boss, center hole is opened in boss center, and its end face is equipped with arc groove around center hole;Shaft end limiting piece has the guide column protruding towards shaft end sealing piece, and the arc curved surface of guide column top end is adapted to arc groove;After assembly, the arc curved surface of guide column top end and arc groove surface contact cooperation, form arc support structure, can disperse stress, absorb eccentricity.This design disperses stress by surface contact, not only can absorb greater angle and eccentricity, also provide stable axial and radial support for coupling, so that it can adapt to higher speed operating condition.

Description

Technical Field

[0001] This utility model belongs to the field of coupling technology and relates to a flexible coupling. Background Technology

[0002] In mechanical transmission systems, flexible couplings, as key components connecting two shafts and compensating for relative displacement, are widely used in various power equipment. Traditional flexible couplings often face problems such as stress concentration and limited eccentricity compensation capabilities. Under high-speed operating conditions, their axial and radial support stability is insufficient, making them prone to component wear or failure due to vibration.

[0003] Existing couplings often employ point or line contact for sealing and positioning, resulting in uneven stress distribution and difficulty in effectively absorbing the impact of angular and eccentric misalignment. Furthermore, some couplings have unreasonable locking mechanisms and insufficient diaphragm assembly positioning accuracy, further impacting transmission stability and service life, and failing to meet the demands of high-speed, high-precision transmission applications. Utility Model Content

[0004] The purpose of this utility model is to provide a flexible coupling that, through structural improvements, solves the problems of stress dispersion and absorption of larger offset angles and eccentricities, thus meeting the application requirements of high-speed and high-precision transmission scenarios.

[0005] The sealing performance meets the requirements of high-speed operation.

[0006] The objective of this utility model is achieved through the following technical solution: A flexible coupling includes a spacer and flanges disposed at both ends of the spacer. The outer side of the flange is connected to a corresponding bushing by bolts, and a diaphragm assembly is provided between the bushing and the flange. A shaft end limiting element is provided on the flange, and a shaft end sealing element is provided on the bushing. A boss is provided on one side of the shaft end seal, a central hole is opened in the center of the boss, and an arc-shaped groove is provided on the end face of the boss located around the central hole. The shaft end limiting member is provided with a guide post protruding towards the shaft end sealing member, and the top end of the guide post is an arc-shaped curved surface that matches the arc-shaped groove. When the shaft end limiting component and the shaft end sealing component are assembled, the arc-shaped curved surface at the top of the guide post and the arc-shaped groove form a surface contact fit, constituting an arc-shaped support structure for dispersing stress and absorbing eccentricity.

[0007] As a further improvement of one embodiment of the present invention, a circular sealing structure is provided at the connection between the shaft end limiting member and the flange. The circular sealing structure includes a circular chamfer on the edge of the shaft end limiting member and a circular incised angle on the flange bayonet corresponding to the circular chamfer. When the shaft end limiting member is installed, its circular chamfer abuts against the circular incised angle of the flange to achieve radial limiting of the shaft end limiting member.

[0008] As a further improvement of one embodiment of the present invention, the contact surfaces of the flange and the shaft end limiting member, the contact surfaces of the shaft end limiting member and the shaft end seal, and the contact surfaces of the shaft end seal and the bushing are all surface contact methods.

[0009] As a further improvement of one embodiment of the present invention, the bolts between the flange and the bushing are locked in a staggered manner.

[0010] As a further improvement of one embodiment of the present invention, the shaft end limiting member is fixed to the flange by bolts, and the shaft end sealing member is fixed to the bushing by bolts.

[0011] As a further improvement of one embodiment of the present invention, the diaphragm assembly is provided with at least four positioning holes symmetrically arranged around the central hole in the circumferential direction. Positioning sleeves are provided with interference fit on the positioning holes. One end of the positioning sleeve is a frustum structure, and the frustum structures of the positioning sleeves are staggered on both sides of the diaphragm assembly. The flange and bushing are provided with grooves that match the frustum structure on the surfaces that contact the diaphragm assembly.

[0012] The above technical solution has the following beneficial effects: the use of the arc-shaped surface and arc-shaped groove between the shaft end limiting component and the shaft end sealing component to disperse stress through surface contact can not only absorb larger deflection angles and eccentricities, but also provide stable axial and radial support for the coupling, enabling it to adapt to higher speed operating conditions. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0014] The structures, proportions, sizes, etc. shown in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0015] Figure 1 A three-dimensional structural diagram of this utility model.

[0016] Figure 2 This is a schematic diagram of the main structure of the present invention.

[0017] Figure 3 for Figure 2 An enlarged schematic diagram of region A in the middle.

[0018] Figure 4 for Figure 2 A schematic diagram of the cross-sectional structure along the AA direction.

[0019] Figure 5 for Figure 4 Enlarged schematic diagram of region B in the middle.

[0020] Figure 6 This is a three-dimensional schematic diagram of the shaft end seal provided by this utility model.

[0021] Figure 7 A three-dimensional schematic diagram of the shaft end limiting component provided by this utility model.

[0022] Figure 8 This is a three-dimensional schematic diagram of the diaphragm assembly provided by this utility model.

[0023] Figure 9 A three-dimensional schematic diagram of the flange provided for this utility model.

[0024] Figure 10 A three-dimensional schematic diagram of the bushing provided by this utility model.

[0025] In the picture: 1. Spacer; 2. Flange; 3. Bushing; 4. Diaphragm assembly; 41. Positioning sleeve; 411. Frustum structure; 5. Shaft end seal; 51. Boss; 52. Center hole; 53. Arc-shaped groove; 6. Shaft end limiting component; 61. Guide post; 62. Arc-shaped curved surface; 7. Outer ring. Detailed Implementation

[0026] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] First embodiment, such as Figures 1-10 As shown, a flexible coupling mainly consists of a spacer 1, a flange 2, a bushing 3, a diaphragm assembly 4, a shaft end seal 5, an outer ring 7, and a shaft end limiting member 6.

[0028] Spacer 1 serves as the core support component, with flanges 2 sealingly and fixedly connected to both ends of spacer 1. Flanges 2 are securely connected to corresponding bushings 3 via bolts, and a diaphragm assembly 4 is installed between bushings 3 and flanges 2. The diaphragm assembly 4 can be made of stacked metal sheets or of elastic polymer material, and its function is to compensate for the relative displacement between the two shafts, buffer and dampen vibrations, and ensure smooth power transmission.

[0029] An outer ring 7 is fitted onto the bushing 3, and the outer ring 7 is tightly secured to the bushing 3 with bolts. The outer ring 7 not only enhances the structural strength of the bushing 3, but also provides a certain degree of protection. The water pipe connector 5 is securely secured to the flange 2 with bolts.

[0030] A shaft end limiting member 6 is provided on the flange 2. The end face of the shaft end limiting member 6 abuts against the corresponding bayonet on the flange 2 and is secured with bolts. A circular sealing structure is provided at the connection between the shaft end limiting member 6 and the flange 2. This circular sealing structure includes a circular chamfer on the edge of the shaft end limiting member 6. A circular inner chamfer corresponding to the circular chamfer is provided at the bayonet on the flange 2. When the shaft end limiting member 6 is installed on the flange 2, the circular chamfer abuts against the circular inner chamfer, which limits the radial movement of the shaft end limiting member 6 and prevents it from moving radially.

[0031] A shaft end seal 5 is provided on the bushing 3. The end face of the shaft end seal 5 abuts against the corresponding mounting groove of the bushing 3 and is locked with bolts. One side of the shaft end seal 5 has a boss 51, and a central hole 52 is provided at the center of the boss 51. An arc-shaped groove 53 is provided on the boss 51 located around the central hole 52. Correspondingly, a guide post 61 is provided on the shaft end limiting member 6. The top end of the guide post 61 is an arc-shaped curved surface 62, which is adapted to the arc-shaped groove 53.

[0032] When the shaft end limiting member 6 and the shaft end sealing member 5 are assembled, the arc-shaped curved surface 62 at the top of the guide post 61 and the arc-shaped groove 53 form a surface contact fit, which constitutes an arc-shaped support structure for dispersing stress and absorbing eccentricity. This structure can better disperse the force and effectively absorb the eccentricity and deflection generated during operation, thereby meeting higher speed requirements and providing stable vertical support for the shaft end limiting member.

[0033] The assembly of the shaft end seal 5 and the shaft end limiting member 6 provides vertical support. The center hole of the shaft end limiting member 6 is connected to the center hole of the flange 2, the center hole of the shaft end limiting member 6 is connected to the center hole of the shaft end seal 5, and the center hole of the shaft end seal 5 is connected to the center hole of the shaft sleeve 3, together forming the internal fluid flow channel of the coupling. Simultaneously, the contact between the flange 2 and the shaft end limiting member 6, the contact between the shaft end limiting member 6 and the shaft end seal 5, and the contact between the shaft end seal 5 and the shaft sleeve 3 are all surface contacts. Furthermore, the bolts between the flange and the shaft sleeve are locked in a staggered manner (i.e., tightened alternately in both directions), further enhancing the integrity and anti-loosening properties of the connection and improving the firmness and stability of the coupling after assembly.

[0034] To improve the overall concentricity of the flexible coupling, combined with Figures 8-10 As shown, six positioning holes are symmetrically arranged around the central hole on the diaphragm assembly 4 (at least four are required in practical applications; six provide better positioning effect and stability). The positioning holes in this design are circular. Positioning sleeves 41 are fitted onto the positioning holes with an interference fit. This interference fit ensures that the positioning sleeves 41 are tightly connected to the diaphragm assembly 4 and are not easily loosened.

[0035] One end of the positioning sleeve 41 is designed as a frustum structure 411, and the frustum structures 411 of multiple positioning sleeves are staggered on both sides of the diaphragm assembly 4.

[0036] Correspondingly, grooves are provided on flange 2 and bushing 3. After the three are fastened with bolts, the engagement of the frustum structure 411 with the corresponding grooves ensures the concentricity of the three components to a great extent. This design makes the relative positions of the components more stable during operation, reduces vibration and wear caused by concentricity deviations, and effectively improves the operating accuracy and service life of the coupling.

[0037] Compared to the original coupling, this utility model uses an arc-shaped surface and arc-shaped groove design between the shaft end limiting component and the shaft end sealing component. Through surface contact to disperse stress, it can not only absorb larger deflection angles and eccentricities, but also provide stable axial and radial support for the coupling, enabling it to adapt to higher speed operating conditions.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flexible coupling, characterized in that, It includes a spacer and flanges at both ends of the spacer. The outer side of the flange is connected to the corresponding bushing by bolts, and a diaphragm assembly is provided between the bushing and the flange. The flange is provided with a shaft end limiting member, and the bushing is provided with a shaft end sealing member. A boss is provided on one side of the shaft end seal, a central hole is opened in the center of the boss, and an arc-shaped groove is provided on the end face of the boss located around the central hole. The shaft end limiting member is provided with a guide post protruding towards the shaft end sealing member, and the top end of the guide post is an arc-shaped curved surface that matches the arc-shaped groove. When the shaft end limiting component and the shaft end sealing component are assembled, the arc-shaped curved surface at the top of the guide post and the arc-shaped groove form a surface contact fit, constituting an arc-shaped support structure for dispersing stress and absorbing eccentricity.

2. The flexible coupling according to claim 1, characterized in that, The connection between the shaft end limiting member and the flange is provided with a circular sealing structure. The circular sealing structure includes a circular chamfer on the edge of the shaft end limiting member and a circular incised angle on the flange jaw that corresponds to the circular chamfer. When the shaft end limiting member is installed, its circular chamfer abuts against the circular incised angle of the flange to achieve radial limiting of the shaft end limiting member.

3. The flexible coupling according to claim 1, characterized in that, The contact surfaces between the flange and the shaft end limiting member, the contact surfaces between the shaft end limiting member and the shaft end seal, and the contact surfaces between the shaft end seal and the shaft sleeve all adopt a surface contact method.

4. The flexible coupling according to claim 3, characterized in that, The bolts between the flange and the bushing are locked in a staggered manner.

5. The flexible coupling according to claim 1, characterized in that, The shaft end limiting component is bolted to the flange, and the shaft end sealing component is bolted to the shaft sleeve.

6. The flexible coupling according to any one of claims 1 to 5, characterized in that, The diaphragm assembly has at least four positioning holes symmetrically arranged around the central hole in the circumferential direction. Positioning sleeves are provided in the positioning holes with an interference fit. One end of the positioning sleeve is a frustum structure, and the frustum structures of the positioning sleeves are staggered on both sides of the diaphragm assembly. The flange and bushing have grooves that match the frustum structure on their contact surfaces with the diaphragm assembly.

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