Flexible coupling for pumps

Abstract

This utility model discloses a flexible coupling for pumps, including a connecting body and a first elastic element. The connecting body includes a ring, and at least two branches are provided on the outer wall of the ring. Two connecting bodies are provided, and the first elastic element is provided between corresponding branches of the two connecting bodies. The first elastic element is fixedly connected to the branches. It also includes an elastic cylinder; the elastic cylinder is provided between the rings of the two connecting bodies, and the elastic cylinder is connected to the ring. This utility model, by providing an elastic cylinder, ensures that the axes of the two connecting bodies are aligned in real time as much as possible. Compared with the prior art that uses elastic elements for connection, this utility model can minimize energy loss during transmission.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, specifically to flexible couplings for pumps. Background Technology

[0002] A coupling is a device that connects two shafts or a shaft and a rotating component, allowing them to rotate together during motion and power transmission, and remaining connected under normal conditions. Sometimes it is also used as a safety device to prevent the connected components from bearing excessive loads, providing overload protection. Flexible couplings are commonly used in pump applications.

[0003] Announcement No.: CN202188036U discloses a flexible coupling and its application in a water pump, including a driving coupling block and a driven coupling block. The driving coupling block and the driven coupling block are respectively provided with a left sleeve and a right sleeve. A left mounting hole and a right mounting hole are respectively opened in the middle of the left sleeve and the right sleeve. A driving connecting plate and a driven connecting plate extend from the outer wall surface of the left sleeve and the right sleeve, respectively. The driving connecting plate and the driven connecting plate are connected together by an elastic element.

[0004] Announcement No. CN202371046U discloses a flexible coupling, including a clamping shaft sleeve, a spring steel connecting piece, and a spring clip plate. The spring steel connecting piece is cross-shaped, with two opposite sides bent upwards and their ends connected to each other through the upper clamping shaft sleeve. The remaining two opposite sides are bent downwards and their ends connected to each other through the lower clamping shaft sleeve, forming two vertically contacting rings. A spring clip plate is clamped and fixed at the center of the cross-shaped spring steel connecting piece. The two clamping shaft sleeves are respectively provided with insertion holes for connecting to the shaft, and the insertion holes are provided with structures for fixing to the shaft.

[0005] Announcement No. CN213744578U discloses an adjustable flexible coupling. It comprises a fixed plate, mounting plate, compression spring, and arc-shaped plate. During use, the elasticity of the compression spring allows for the connection and clamping of shafts with different diameters. The arc-shaped plate ensures a closer fit to the shaft surface, improving the coupling's applicability. The coupling also includes an arc-shaped plate, a second rubber body, mounting grooves, and protrusions. The second rubber body, made of wear-resistant rubber, enhances wear resistance with the shaft. The engagement between the mounting groove and the protrusion facilitates replacement. The coupling includes a fixed housing, pre-drilled grooves, locking bolts, and nuts. During installation, the shafts are embedded into the arc-shaped plate within the first rubber body, then pressed down by the fixed housing. The locking bolts are then tightened through the pre-drilled grooves in both fixed housings, and finally secured with the nuts. Disassembly is achieved by simply removing the nuts, making disassembly more convenient.

[0006] The transmission stability and transmission efficiency of the prior art are not as good as those of the present invention.

[0007] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0008] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a flexible coupling for pumps.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A flexible coupling for pumps includes a connecting body and a first elastic element. The connecting body includes a ring, and at least two branches are provided on the outer wall of the ring. Two connecting bodies are provided, and the first elastic element is provided between corresponding branches of the two connecting bodies. The first elastic element is fixedly connected to the branches. The coupling also includes an elastic cylinder. The elastic cylinder is provided between the rings of the two connecting bodies, and the elastic cylinder is connected to the ring.

[0011] Furthermore, the elastic cylinder is provided with a first elastic through groove and a second elastic through groove.

[0012] Furthermore, the elastic groove angle of the first elastic groove or the second elastic groove is 180°-270°;

[0013] The first elastic through groove and the second elastic through groove are staggered in the axial direction, and the stagger distance of the elastic through grooves is half of the spacing between the elastic through grooves;

[0014] The spacing between the flexible through slots is four to ten times the width of the flexible through slots.

[0015] The first elastic through groove and the second elastic through groove are arranged opposite each other in the radial direction.

[0016] Furthermore, a keyway is provided at the end of the ring away from the elastic cylinder, the branch body is fin-shaped, and the first elastic element is fixedly connected to the branch body by a hook.

[0017] Furthermore, the elastic cylinder is connected to the ring in the connecting body via a rotating mechanism;

[0018] The rotating mechanism includes a connecting ring and a support ring;

[0019] The connecting ring is fixedly connected to the end of the elastic cylinder. The end of the connecting ring away from the elastic cylinder is provided with a ball groove, and a ball bearing is provided in the ball groove.

[0020] The outer wall of the ring is provided with a receiving wall at the end of the elastic cylinder, the support ring is disposed in the receiving wall, a second elastic element is fixedly disposed at the end of the support ring facing the connecting body, the connecting ring is disposed in the receiving wall, and the ball is in contact with the support ring;

[0021] A baffle is fixedly installed at the end of the receiving wall to limit the axial movement of the connecting ring.

[0022] Furthermore, at least three of the second elastic elements are provided, and they are evenly distributed along the circumference of the support ring.

[0023] Furthermore, the support ring is provided with a ball groove corresponding to the ball.

[0024] Furthermore, the ball groove on the connecting ring is a single-ball groove or a ring groove.

[0025] Furthermore, the baffle is at least two arc-shaped plates, and the baffle is fixedly connected to the receiving wall by small bolts.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. This utility model ensures that the axes of the two connecting blocks are aligned in real time by setting an elastic cylinder;

[0028] 2. Compared with the prior art that uses elastic elements for connection, this utility model can minimize energy loss during transmission.

[0029] 3. This utility model improves the stability of transmission by using connecting rings installed on both sides and sliding connections between the two connecting blocks; it can effectively improve the stability of transmission. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the flexible coupling for pumps according to this utility model;

[0031] Figure 2 This is a half-sectional structural diagram of the flexible coupling for pumps of this utility model;

[0032] Figure 3 This is a schematic diagram of the elastic cylinder and rotating mechanism in this utility model;

[0033] Figure 4 This is a cross-sectional view of the elastic cylinder and the rotating mechanism in this utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the elastic through groove in this utility model.

[0035] In the diagram: 1. Drive shaft; 1.1. Key block; 2. Connecting body; 2.1. Branch body; 2.2. Keyway; 2.3. Receiving wall; 2.4. Baffle; 2.5. Small bolt; 3. First elastic element; 4. Elastic cylinder; 4.1. First elastic through groove; 4.2. Second elastic through groove; 5. Second elastic element; 6. Support ring; 7. Ball bearing; 8. Connecting ring;

[0036] A. Elastic slot angle; B. Elastic slot stagger distance; C. Elastic slot spacing. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Example 1:

[0039] Please see Figures 1 to 5 The flexible coupling for pumps provided by this utility model includes a connecting body 2, a first elastic element 3, and an elastic cylinder 4. The connecting body 2 includes a ring, and at least two branch bodies 2.1 are provided on the outer wall of the ring. Two connecting bodies 2 are provided, and an elastic cylinder 4 is provided between the rings of the two connecting bodies 2. The elastic cylinder 4 is connected to the ring. The first elastic element 3 is provided between the corresponding branch bodies 2.1 of the two connecting bodies 2. The first elastic element 3 is fixedly connected to the branch body 2.1.

[0040] The end of the ring away from the elastic cylinder 4 is provided with a keyway 2.2, which is used to engage and fix with the key block 1.1 on the transmission shaft 1.

[0041] Among them, branch body 2.1 is fin-shaped, with a large installation space, making the coupling easy to assemble.

[0042] The first elastic element 3 is a spring, and the first elastic element 3 is fixedly connected to the branch body 2.1 by a hook.

[0043] Among them, the elastic cylinder 4, for example Figure 4 , Figure 5 As shown, the elastic cylinder 4 is provided with a first elastic through groove 4.1 and a second elastic through groove 4.2, which gives the elastic cylinder 4 a good deformation capacity.

[0044] Specifically, the elastic groove angle A of the first elastic groove 4.1 or the second elastic groove 4.2 is 180°-270°.

[0045] Specifically, the first elastic through groove 4.1 and the second elastic through groove 4.2 are staggered in the axial direction, the stagger distance B of the elastic through grooves is half of the elastic through groove spacing C, and the elastic through groove spacing C is four to ten times the width of the elastic through groove.

[0046] Specifically, the first elastic through groove 4.1 and the second elastic through groove 4.2 are arranged opposite each other in the radial direction.

[0047] In this embodiment, the elastic cylinder 4 improves the coaxiality between the two drive shafts 1.

[0048] Example 2:

[0049] In Example 1, the two drive shafts 1 will have a near point and a far point after they deviate. During the rotation, the elastic cylinder 4 will reciprocate and deform, reducing its service life. This example further improves the service life of the pump flexible coupling based on Example 1. The elastic cylinder 4 is connected to the ring in the connecting body 2 through a rotating mechanism, so that the elastic cylinder 4 does not rotate synchronously with the connecting body 2, reducing the number of repeated deformations of the elastic cylinder 4 during rotation and improving its service life.

[0050] The rotating mechanism includes a connecting ring 8 and a support ring 6. The connecting ring 8 is fixedly connected to the end of the elastic cylinder 4. A ball groove is provided at the end of the connecting ring 8 away from the elastic cylinder 4, and a ball bearing 7 is provided in the ball groove. A receiving wall 2.3 is provided on the outer wall of the ring at the end of the elastic cylinder 4. The support ring 6 is disposed in the receiving wall 2.3. A second elastic element 5 is fixedly provided at the end of the support ring 6 facing the connecting body 2. The connecting ring 8 is disposed in the receiving wall 2.3, and the ball bearing 7 contacts the support ring 6. A baffle 2.4 is fixedly provided at the end of the receiving wall 2.3 to achieve axial limiting of the connecting ring 8.

[0051] Among them, at least three second elastic elements 5 are provided and are evenly distributed along the circumference of the support ring 6. The second elastic element 5 is a spring. The second elastic element 5 keeps the support ring 6 pressed on the ball 7. The second elastic element 5 also plays the role of sharing the shrinkage amount when axial shrinkage deformation occurs.

[0052] The support ring 6 is provided with a ball groove corresponding to the ball 7.

[0053] Among them, multiple balls 7 are provided to make the support ring 6 bear force evenly. The balls 7 reduce the friction between the support ring 6 and the connecting ring 8 and reduce the synchronous rotation phenomenon between the elastic cylinder 4 and the connecting body 2.

[0054] The ball groove on the connecting ring 8 can be a single ball groove, eliminating the need for a cage, or it can be an annular groove, which is easy to process. After the ball 7 is set in the annular groove, the ball 7 is supported by a cage.

[0055] The connecting ring 8 and the elastic cylinder 4 are integrally formed. First, the overall shape is processed, then the details of the connecting ring 8 are processed, and finally the elastic groove on the elastic cylinder 4 is processed.

[0056] Among them, the baffle 2.4 consists of two arc plates, and the baffle 2.4 is fixedly connected to the receiving wall 2.3 by small bolts 2.5. The small bolts 2.5 are internal hex bolts, which are easy to install and remove; lubricating oil is provided between the baffle 2.4 and the connecting ring 8 to enhance lubrication.

[0057] In this embodiment, the connection between the elastic cylinder 4 and the connecting body 2 is changed to a sliding connection, which reduces the synchronous rotation phenomenon between the elastic cylinder 4 and the connecting body 2, so that the elastic cylinder 4 can be in a stable state and improve the service life of the coupling.

[0058] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0059] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", 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 utility model and simplifying the description, and do not indicate or imply that the device or unit 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 utility model.

[0061] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] 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 for pumps, comprising a connecting body and a first elastic element, wherein the connecting body includes a ring, the outer wall of the ring is provided with at least two branches, and two connecting bodies are provided, characterized in that, A first elastic element is provided between corresponding branches of the two connecting bodies, and the first elastic element is fixedly connected to the branch body; it also includes an elastic cylinder; An elastic cylinder is provided between the two connecting bodies and the rings, and the elastic cylinder is connected to the rings.

2. The flexible coupling for pumps according to claim 1, characterized in that, The elastic cylinder is provided with a first elastic through groove and a second elastic through groove.

3. The flexible coupling for pumps according to claim 2, characterized in that, The elastic groove angle of the first elastic groove or the second elastic groove is 180°-270°; The first elastic through groove and the second elastic through groove are staggered in the axial direction, and the stagger distance of the elastic through grooves is half of the spacing between the elastic through grooves; The spacing between the flexible through slots is four to ten times the width of the flexible through slots; The first elastic through groove and the second elastic through groove are arranged opposite each other in the radial direction.

4. The flexible coupling for pumps according to claim 1, characterized in that, The end of the ring away from the elastic cylinder is provided with a keyway, the branch body is fin-shaped, and the first elastic element is fixedly connected to the branch body by a hook.

5. The flexible coupling for pumps according to claim 1, characterized in that, The elastic cylinder is connected to the ring in the connecting body via a rotating mechanism; The rotating mechanism includes a connecting ring and a support ring; The connecting ring is fixedly connected to the end of the elastic cylinder. The end of the connecting ring away from the elastic cylinder is provided with a ball groove, and a ball bearing is provided in the ball groove. The outer wall of the ring is provided with a receiving wall at the end of the elastic cylinder, the support ring is disposed in the receiving wall, a second elastic element is fixedly disposed at the end of the support ring facing the connecting body, the connecting ring is disposed in the receiving wall, and the ball is in contact with the support ring; A baffle is fixedly installed at the end of the receiving wall to limit the axial movement of the connecting ring.

6. The flexible coupling for pumps according to claim 5, characterized in that, The second elastic element is provided in at least three parts and is evenly distributed along the circumference of the support ring.

7. The flexible coupling for pumps according to claim 5, characterized in that, The support ring is provided with ball grooves corresponding to the balls.

8. The flexible coupling for pumps according to claim 5, characterized in that, The ball groove on the connecting ring is either a single ball groove or a ring groove.

9. The flexible coupling for pumps according to claim 5, characterized in that, The baffle consists of at least two arc-shaped plates, and the baffle is fixedly connected to the receiving wall by small bolts.

Images