Flexible coupling
By adopting a closed ring toothed frame and a non-contact elastic element design, combined with tin bronze material and anti-slip ring components, the problems of complex manufacturing and high maintenance costs of serpentine spring couplings are solved, achieving a low-cost, long-life coupling solution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI TAISHI ELECTROMECHANICAL TECH CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-19
AI Technical Summary
The existing serpentine spring coupling has a complex manufacturing process, high cost, and is prone to wear. It also requires regular grease replacement, and wear leads to sludge formation, which affects its service life.
The design employs a closed frame with first and second annular toothed grooves and an elastic element with no contact relationship, eliminating the need for bending and shaping processes. The elastic element is cold-drawn from tin bronze and equipped with an anti-slip ring assembly to prevent slippage, thus eliminating the need for grease filling.
It reduces processing costs, simplifies manufacturing processes, extends service life, eliminates the need for grease, and reduces wear and sludge formation.
Smart Images
Figure CN224260760U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of coupling technology, and in particular to a flexible coupling. Background Technology
[0002] Existing serpentine spring couplings consist of hubs, serpentine springs, housings, and seals. The serpentine springs are inserted into the toothed grooves of the two hubs, and then secured inside the housing. The housing is filled with grease and sealed. The main problems with existing serpentine spring couplings are as follows:
[0003] First, the three main components—the serpentine spring, the housing, and the wheel hub—each account for about one-third of the total cost of the machine. Moreover, the housing and the serpentine spring are easily damaged parts, resulting in high operating costs.
[0004] Secondly, the manufacturing process of serpentine springs is complex, requiring bending and shaping fixtures, and the shaping fixtures have a short service life, resulting in a long processing cycle.
[0005] Third, the inside of the cover needs to be filled with grease and replaced regularly. After the serpentine spring and tooth groove wear down, sludge will form inside the cover, further accelerating the wear of the serpentine spring or teeth.
[0006] Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the aforementioned defects of the prior art. Utility Model Content
[0007] The purpose of this application is to provide a flexible coupling to overcome or at least mitigate one of the aforementioned defects of the prior art.
[0008] To achieve the above objectives, this application provides a flexible coupling, the flexible coupling comprising:
[0009] First wheel hub and second wheel hub;
[0010] The first annular toothed groove sealing frame is hollow inside and has multiple first axial through holes on both sides. The first annular toothed groove sealing frame is located at one end of the first wheel hub.
[0011] The second annular toothed groove closed frame is hollow inside and has multiple second axial through holes on both sides. The second annular toothed groove closed frame is located at one end of the second hub near the first annular toothed groove closed frame. One first axial through hole and one second axial through hole form a set of receiving grooves.
[0012] The elastic element is a plurality of elastic elements, each elastic element having no contact with each other, and a set of receiving grooves for accommodating a portion of one elastic element.
[0013] Optionally, a plurality of chip leakage holes are provided on the outer side of the first annular toothed groove enclosure frame;
[0014] Multiple chip leakage holes are provided on the outer side of the second annular toothed groove closed frame.
[0015] Optionally, the flexible coupling further includes a first anti-slip ring assembly, which is disposed on the first hub and one side of the first anti-slip ring assembly is close to one end of the elastic element.
[0016] Optionally, the flexible coupling further includes a second anti-slip ring assembly, which is disposed on the second hub and one side of the second anti-slip ring assembly is close to the other end of the elastic element.
[0017] Optionally, the first anti-slip ring assembly includes a first anti-slip ring first half and a first anti-slip ring second half, wherein the first anti-slip ring first half and the first anti-slip ring second half are fixedly connected by screws.
[0018] The second anti-slip ring assembly includes a first half of the second anti-slip ring and a second half of the second anti-slip ring, which are fixedly connected by screws.
[0019] Optionally, the first hub is provided with a first annular boss, and the other side of the first anti-slip ring assembly opposite to the side that contacts the elastic element contacts the first annular boss.
[0020] The second hub is provided with a second annular boss, and the other side of the second anti-slip ring assembly opposite to the side that contacts the elastic element contacts the second annular boss.
[0021] Optionally, the first hub is provided with a plurality of screws along the axial direction, and the side of the first anti-slip ring assembly opposite to the side that contacts the elastic element contacts each of the screws.
[0022] The second hub is provided with a plurality of screws along the axial direction, and the side of the second anti-slip ring assembly opposite to the side that contacts the elastic element contacts each of the screws.
[0023] Optionally, the elastic element is made of tin bronze and cold-drawn.
[0024] Optionally, the surface of the first annular toothed closed frame that contacts the elastic element is a curved surface, and the curvature of the curved surface is towards the elastic element.
[0025] The surface of the second annular toothed closed frame that contacts the elastic element is a curved surface, and the curvature of the curved surface is towards the elastic element.
[0026] Optionally, the vertical distance between one end face of the first curved surface and the elastic element is less than the vertical distance between the other end face of the first curved surface and the elastic element.
[0027] The vertical distance between one end face of the second curved surface and the elastic element is less than the vertical distance between the other end face of the second curved surface and the elastic element.
[0028] The flexible coupling of this application uses a first annular toothed groove closed frame and a second annular toothed groove closed frame as a transmission device for each elastic element that has no contact with each other. When the first hub rotates as the driving element, it drives the elastic element to rotate through the first annular toothed groove closed frame and the second annular toothed groove closed frame. The first annular toothed groove closed frame transmits the torque to each spring respectively, instead of using the U-shaped spring method in the prior art. This eliminates the complicated bending and shaping process and reduces the processing cost. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the structure of a flexible coupling according to an embodiment of this application.
[0030] Figure 2 yes Figure 1 The diagram shows the structure of the first hub in the flexible coupling.
[0031] Figure 3 yes Figure 1 The diagram shows the structure of the first anti-slip ring assembly in the flexible coupling.
[0032] Figure 4 yes Figure 1 A schematic diagram of the contact surface between the first annular toothed groove closed frame and the elastic element in the flexible coupling shown.
[0033] Figure Labels
[0034] 1-First hub; 2-Second hub; 3-First annular toothed groove sealing frame; 4-Second annular toothed groove sealing frame; 5-Elastic element; 6-Drop hole; 7-First anti-slip ring assembly; 8-Second anti-slip ring assembly; 71-First anti-slip ring first half; 72-First anti-slip ring second half; 9-First annular boss. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "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 limiting the scope of protection of this application.
[0037] like Figures 1 to 3 The flexible coupling shown includes a first hub 1 and a second hub 2, a first annular toothed groove closing frame 3, a second annular toothed groove closing frame 4, and an elastic element 5; wherein,
[0038] The first annular toothed groove closed frame 3 is hollow inside and has multiple first axial through holes on both sides. The first annular toothed groove closed frame 3 is located at one end of the first wheel hub 1.
[0039] The second annular toothed groove closed frame 4 is hollow inside and has multiple second axial through holes on both sides. The second annular toothed groove closed frame 4 is located at one end of the second hub 2 near the first annular toothed groove closed frame 3. One first axial through hole and one second axial through hole form a set of receiving grooves.
[0040] There are multiple elastic elements 5, and each elastic element 5 is not in contact with the others. A set of receiving grooves is used to accommodate a part of one elastic element 5.
[0041] In this embodiment, a plurality of chip leakage holes 6 are provided on the outer side of the first annular toothed groove sealing frame 3; a plurality of chip leakage holes 6 are provided on the outer side of the second annular toothed groove sealing frame 4.
[0042] The chip-removing holes 6 can be used to remove debris generated by wear of elastic elements and other parts.
[0043] See Figure 1 as well as Figure 3 The flexible coupling further includes a first anti-slip ring assembly 7, which is disposed on the first hub 1 and one side of the first anti-slip ring assembly contacts one end of the elastic element 5. The first anti-slip ring assembly 7 is used to prevent the elastic element 5 from moving and from further moving towards the first anti-slip ring assembly after contacting it.
[0044] In this embodiment, the flexible coupling further includes a second anti-slip ring assembly 8, which is disposed on the second hub 2 and one side of the second anti-slip ring assembly 8 contacts the other end of the elastic element 5. The second anti-slip ring assembly 8 is used to prevent the elastic element 5 from moving and from further moving towards the second anti-slip ring assembly after contacting it.
[0045] By setting the first anti-slip ring assembly 7 and the second anti-slip ring assembly 8, excessive axial movement of the spring in the flexible coupling can be prevented during operation.
[0046] In this embodiment, the first anti-slip ring assembly 7 includes a first anti-slip ring first half 71 and a first anti-slip ring second half 72, and the first anti-slip ring first half 71 and the first anti-slip ring second half 72 are fixedly connected by screws.
[0047] The second anti-slip ring assembly includes a first half of the second anti-slip ring and a second half of the second anti-slip ring, which are fixedly connected by screws.
[0048] In this embodiment, both the first anti-slip ring assembly 7 and the second anti-slip ring assembly adopt the above-mentioned split method, which makes it convenient to directly snap the anti-slip ring into place after the spring is installed.
[0049] In this embodiment, the two halves of the anti-slip ring are fixedly connected by screws. To provide sufficient axial force, an annular boss is provided on the hub to prevent axial movement of the anti-slip ring. Therefore, the connecting screws of the anti-slip ring can only serve a connecting function and do not need to provide sufficient axial friction force.
[0050] Specifically, the first wheel hub is provided with a first annular boss 9, and the other side of the first anti-slip ring assembly 7 opposite to the side that contacts the elastic element 5 contacts the first annular boss 9.
[0051] The second hub is provided with a second annular boss, and the other side of the second anti-slip ring assembly opposite to the side that contacts the elastic element contacts the second annular boss.
[0052] In another alternative embodiment, a plurality of screws are provided on the first hub along the axial direction, and the opposite side of the first anti-slip ring assembly that contacts the elastic element contacts each of the screws.
[0053] The second hub is provided with a plurality of screws along the axial direction, and the side of the second anti-slip ring assembly opposite to the side that contacts the elastic element contacts each of the screws.
[0054] By installing radial bolts on both the first and second wheel hubs, the anti-ejection ring can be axially positioned, which is also simpler and more flexible. The radial bolts can be set in multiple positions along the axial direction of the wheel hub to flexibly adjust the position of the anti-ejection ring.
[0055] In this embodiment, the elastic element is cold-drawn from tin bronze and then directly cut to the required length. This method eliminates the complex bending and shaping processes compared to existing technologies, resulting in lower processing costs. Since tin bronze has a self-lubricating effect, grease lubrication is no longer required between the spring and the tooth groove, thus eliminating the need for a sealed cover.
[0056] See Figure 4 In this embodiment, the surface of the first annular toothed closed frame 3 that contacts the elastic element 5 is a curved surface, and the bending direction of the curved surface is towards the elastic element 5. This surface is called the first curved surface.
[0057] The surface of the second annular toothed closed frame 4 that contacts the elastic element 5 is a curved surface, and the curvature of the curved surface is towards the elastic element 5. This surface is called the second curved surface.
[0058] See Figure 4 In this embodiment, the vertical distance between one end face of the first curved surface and the elastic element 5 is ( Figure 4 L1 in the figure is less than the vertical distance from the end face of the other end of the first curved surface to the elastic element 5. Figure 4 (L2 in the diagram); designing in this asymmetrical manner with an axially curved surface allows for greater deformation of the first surface.
[0059] The vertical distance between one end face of the second curved surface and the elastic element 5 is less than the vertical distance between the other end face of the second curved surface and the elastic element 5.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A flexible coupling, characterized by, The flexible coupling includes: First wheel hub (1) and second wheel hub (2); The first annular toothed groove closed frame (3) is hollow inside and has multiple first axial through holes on both sides. The first annular toothed groove closed frame (3) is located at one end of the first hub (1). The second annular toothed groove closed frame (4) is hollow inside and has multiple second axial through holes on both sides. The second annular toothed groove closed frame (4) is located at one end of the second hub (2) near the first annular toothed groove closed frame (3). One first axial through hole and one second axial through hole form a set of receiving grooves. The elastic element (5) is a plurality of elastic elements (5), and each elastic element (5) is not in contact with each other. A set of receiving grooves is used to receive a part of an elastic element (5).
2. The flexible coupling of claim 1 wherein, Multiple chip leakage holes (6) are provided on the outer side of the first annular toothed groove closed frame (3); Multiple chip leakage holes (6) are provided on the outer side of the second annular toothed groove closed frame (4).
3. The flexible coupling of claim 2 wherein, The flexible coupling further includes a first anti-slip ring assembly (7), which is disposed on the first hub (1) and one side of the first anti-slip ring assembly is close to one end of the elastic element (5).
4. The flexible coupling of claim 3 wherein, The flexible coupling further includes a second anti-slip ring assembly (8), which is disposed on the second hub (2) and one side of the second anti-slip ring assembly (8) is close to the other end of the elastic element (5).
5. The flexible coupling of claim 4 wherein, The first anti-slip ring assembly (7) includes a first anti-slip ring first half (71) and a first anti-slip ring second half (72), and the first anti-slip ring first half (71) and the first anti-slip ring second half (72) are fixedly connected by screws; The second anti-slip ring assembly includes a first half of the second anti-slip ring and a second half of the second anti-slip ring, which are fixedly connected by screws.
6. The flexible coupling of claim 5 wherein, The first wheel hub is provided with a first annular boss (9), and the other side of the first anti-slip ring assembly (7) opposite to the side that contacts the elastic element (5) contacts the first annular boss (9). The second hub is provided with a second annular boss, and the other side of the second anti-slip ring assembly opposite to the side that contacts the elastic element contacts the second annular boss.
7. The flexible coupling of claim 5 wherein, The first hub is provided with a plurality of screws along the axial direction, and the side opposite to the side of the first anti-slip ring assembly that contacts the elastic element contacts each of the screws. The second hub is provided with a plurality of screws along the axial direction, and the side of the second anti-slip ring assembly opposite to the side that contacts the elastic element contacts each of the screws.
8. The flexible coupling as set forth in any one of claims 1 to 7, characterized by The elastic element is made of tin bronze and cold-drawn.
9. The flexible coupling of claim 8 wherein, The surface of the first annular toothed closed frame (3) that contacts the elastic element (5) is a curved surface, and the bending direction of the curved surface is towards the elastic element (5). This surface is called the first curved surface. The face of the second annular tooth slot closed frame (4) in contact with the elastic element (5) is a curved surface, and the bending direction of the curved surface is bending to the direction of the elastic element (5), which is called the second curved surface.
10. The flexible coupling of claim 9 wherein, The vertical distance between the end face of one end of the first curved surface and the elastic element (5) is less than the vertical distance between the end face of the other end of the first curved surface and the elastic element (5). The vertical distance between the end face of one end of the second curved surface and the elastic element (5) is less than the vertical distance between the end face of the other end of the second curved surface and the elastic element (5).