Combined flywheel

Abstract

The utility model discloses a combined type flywheel, which comprises a cone pulley, a flywheel shaft, a flywheel shaft, a flywheel shaft, a flywheel shaft, a flywheel shaft, a flywheel shaft, a flywheel shaft, a flywheel shaft and a flywheel shaft, and is characterized in that the cone pulley is provided with a large-diameter end and a small-diameter end; a large gear ring unit; the wheel hub is integrated with the large gear ring unit, the wheel hub and the large gear ring unit are coaxially arranged, the wheel hub is arranged in the wheel hole in a penetrating mode, the large gear ring unit and the large-diameter end are oppositely arranged, one of the large gear ring unit and the large-diameter end is provided with a riveting part, the other one of the large gear ring unit and the large-diameter end is provided with a riveting hole, the riveting part is arranged in the riveting hole in a penetrating mode, and the large gear ring unit and the cone pulley are riveted through the riveting part; one of the large gear ring unit and the large-diameter end is provided with an anti-torque protrusion, the other one of the large gear ring unit and the large-diameter end is provided with a limiting hole, and the anti-torque protrusion is arranged in the limiting hole in a penetrating mode. And the anti-torsion bulges are arranged in the limiting holes in a penetrating manner, so that the risk of relative rotation between the large gear ring unit and the cone pulley can be reduced, the anti-torsion capability is improved, and the reliability of the combined flywheel is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of variable speed flywheels, in particular to a combined flywheel. Background Art

[0002] With the progress of society, various means of transportation nowadays have higher and higher requirements for lightweight and high strength. At present, bicycles are usually reduced in weight by lightweighting materials and structures, and lightweighting is based on sufficient strength and rigidity. Especially for sports bicycles, they have higher requirements for the strength and rigidity of the speed-changing flywheel.

[0003] In the related art, a variable speed flywheel is usually assembled from a large gear ring, a wheel hub and a tower pulley, wherein the large gear ring and the tower pulley are usually only riveted together with rivets, which has poor torsional resistance and low reliability. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a combined flywheel with better reliability.

[0005] According to some embodiments of the utility model, the combined flywheel comprises: a step pulley having a large diameter end and a small diameter end arranged opposite to the large diameter end, the small diameter end being provided with a wheel hole; a large ring gear unit; a wheel hub integrated with the large ring gear unit, the wheel hub being coaxially arranged with the large ring gear unit, and the wheel hub is inserted into the wheel hole, and the large ring gear unit is arranged opposite to the large diameter end.

[0006] Among them, one of the large gear ring unit and the large diameter end is provided with a riveted portion, and the other is provided with a riveted hole. The riveted portion is passed through the riveted hole and rivets the large gear ring unit to the step wheel; one of the large gear ring unit and the large diameter end is provided with an anti-torsion protrusion, and the other is provided with a limiting hole. The anti-torsion protrusion is passed through the limiting hole.

[0007] The combined flywheel according to the embodiment of the utility model has at least the following beneficial effects:

[0008] In the combined flywheel of the utility model, the large ring gear unit is coaxially arranged with the wheel hub, and the large ring gear unit and the wheel hub are an integrated structure, that is, the large ring gear unit and the wheel hub are made of the same integral material, which is convenient for manufacturing; the riveting part is penetrated through the riveting hole and riveted with the tower wheel, and under the action of the riveting part, the large ring gear unit and the tower wheel can be fixed, and the large ring gear unit and the tower wheel can be reliably connected; in addition, the anti-torsion protrusion is penetrated through the limiting hole, so that the risk of relative rotation between the large ring gear unit and the tower wheel can be reduced, the anti-torsion capacity can be improved, and the reliability of the combined flywheel can be further improved.

[0009] According to some embodiments of the utility model, the large diameter end is provided with a plurality of the rivet holes, and the plurality of the rivet holes are arranged at intervals along the circumference of the large diameter end;

[0010] The large gear ring unit is provided with a plurality of riveted parts, the plurality of riveted parts are arranged at intervals along the circumference of the large gear ring unit, and the plurality of riveted parts are penetrated into the plurality of riveted holes in a one-to-one correspondence.

[0011] According to some embodiments of the utility model, the riveted portion is provided on the large gear ring unit, the large diameter end is provided with the riveted hole, the riveted portion passes through the riveted hole, and one end of the riveted portion away from the large gear ring unit is riveted to the step wheel.

[0012] According to some embodiments of the utility model, the large gear ring unit is provided with the riveting portion, the large diameter end is provided with the riveting hole, the end of the riveting portion away from the large gear ring unit is a first diameter reducing section whose diameter gradually increases along a preset direction, and the first diameter reducing section is riveted into the riveting hole;

[0013] Wherein, the preset direction is the arrangement direction from the large ring gear unit to the large diameter end.

[0014] According to some embodiments of the utility model, the riveted part and the large gear ring unit are an integral structure; or, the large gear ring unit is provided with an assembly hole arranged opposite to the riveted hole, the riveted part and the large gear ring unit are a split structure, and the riveted part is passed through the assembly hole.

[0015] According to some embodiments of the present invention, the wheel hub is riveted to the hole wall of the wheel hole.

[0016] According to some embodiments of the utility model, one end of the wheel hub away from the large gear ring unit is a second diameter reducing section whose diameter gradually increases along a preset direction, and the second diameter reducing section is riveted into the wheel hole;

[0017] Wherein, the preset direction is the arrangement direction from the large ring gear unit to the large diameter end.

[0018] According to some embodiments of the present invention, a positioning groove is provided on the outer side wall of one end of the hub away from the large ring gear unit, and the small diameter end is positioned and matched with the positioning groove.

[0019] According to some embodiments of the present invention, the side of the large gear ring unit close to the large diameter end has a plurality of anti-torsion protrusions arranged at intervals along the circumference of the large gear ring unit;

[0020] The large diameter end is provided with a plurality of the limiting holes spaced apart along the circumference of the large diameter end, and the plurality of the anti-torsion protrusions are passed through the plurality of limiting holes in a one-to-one correspondence.

[0021] According to some embodiments of the present utility model, the riveted portion includes an anti-torsion step and a connecting portion connected to the anti-torsion step;

[0022] The riveting hole comprises an anti-torsion section and an assembly section which are interconnected, the anti-torsion step is passed through the anti-torsion section, the connecting portion is passed through the assembly section, and one end of the connecting portion away from the anti-torsion step is riveted to form a riveted joint.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 It is a partial schematic diagram of the cross-sectional structure of the combined flywheel of the first embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the explosion structure of the combined flywheel of the first embodiment of the utility model;

[0027] Figure 3 It is a partial schematic diagram of the cross-sectional structure of the combined flywheel of the second embodiment of the utility model;

[0028] Figure 4 It is a partial schematic diagram of the cross-sectional structure of the combined flywheel of the third embodiment of the utility model;

[0029] Figure 5 It is a partial schematic diagram of the cross-sectional structure of the combined flywheel of the fourth embodiment of the utility model;

[0030] Figure 6 It is a partial schematic diagram of the cross-sectional structure of the combined flywheel of the fifth embodiment of the utility model.

[0031] Figure Number:

[0032] 100, wheel hub; 110, positioning groove;

[0033] 200, large gear ring unit; 201, assembly hole; 210, riveted portion; 211, anti-torsion step; 212, connecting column; 213, riveted head; 220, anti-torsion protrusion;

[0034] 300, step pulley; 301, wheel hole; 302, inner gear ring; 310, large diameter end; 311, rivet hole; 3111, anti-torsion section; 3112, assembly section; 312, limit hole; 320, small diameter end. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Embodiment 1

[0039] like Figure 1 As shown, a combined flywheel provided in the first embodiment of the present application includes a hub 100 , a large ring gear unit 200 and a step pulley 300 .

[0040] The large gear ring unit 200 is coaxially arranged with the wheel hub 100, and the large gear ring unit 200 and the wheel hub 100 are an integral structure, that is, the large gear ring unit 200 and the wheel hub 100 are made of the same integral material. The material of the large gear ring unit 200 and the wheel hub 100 can be aluminum alloy, magnesium alloy, titanium alloy or other light and high-strength materials.

[0041] It should be noted that the large gear ring unit 200 can be a single-layer structure or a multi-layer structure. Figure 1In the embodiment, the large gear ring unit 200 is a double-layer structure, which includes two gear rings, and the diameters of the two gear rings are different.

[0042] The step pulley 300 has a large diameter end 310 and a small diameter end 320 disposed opposite to the large diameter end 310 .

[0043] Specifically, the step pulley 300 is formed by connecting a plurality of gear rings with successively increasing diameters, wherein the end where the gear ring with the largest diameter (the inner gear ring 302 ) is located is the large diameter end 310 , and the end where the gear ring with the smallest diameter is located is the small diameter end 320 .

[0044] Furthermore, a wheel hole 301 is provided at the small diameter end 320 of the step pulley 300, the wheel hub 100 is inserted into the wheel hole 301, and the large ring gear unit 200 is arranged opposite to the large diameter end 310 of the step pulley 300, that is, the large ring gear unit 200 is located on the side of the step pulley 300 away from the small diameter end 320.

[0045] Combination Figure 1 and Figure 2 , wherein a riveting portion 210 is provided on the large gear ring unit 200 ; a riveting hole 311 is provided at the large diameter end 310 of the step pulley 300 , and the riveting portion 210 is passed through the riveting hole 311 and riveted to the step pulley 300 .

[0046] It can be understood that, under the action of the riveting part 210 , the large ring gear unit 200 and the step pulley 300 can be fixed, and a reliable connection between the large ring gear unit 200 and the step pulley 300 can be achieved.

[0047] Furthermore, the large diameter end 310 of the step pulley 300 is provided with a plurality of rivet holes 311, which are arranged at intervals along the circumference of the large diameter end 310 of the step pulley 300; the large gear ring unit 200 is provided with a plurality of rivet parts 210, which are arranged at intervals along the circumference of the large gear ring unit 200, and the plurality of rivet parts 210 are correspondingly penetrated in the plurality of rivet holes 311. In this way, the reliability of the connection between the large gear ring unit 200 and the step pulley 300 can be further improved.

[0048] Combination Figure 1 and Figure 2 The large gear ring unit 200 has an anti-torsion protrusion 220 on one side close to the large diameter end 310 of the tower wheel 300. The large diameter end 310 of the tower wheel 300 is provided with a limiting hole 312, and the anti-torsion protrusion 220 is passed through the limiting hole 312. In this way, the risk of relative rotation between the large gear ring unit 200 and the tower wheel 300 can be reduced, and the reliability of the connection between the large gear ring unit 200 and the tower wheel 300 can be improved.

[0049] Specifically, the anti-torsion protrusion 220 and the large ring gear unit 200 are an integral structure and are formed on the large ring gear unit 200. The cross-section of the anti-torsion protrusion 220 is a non-circular structure. The hole wall of the limiting hole 312 is matched with the side wall shape of the anti-torsion protrusion 220. After the anti-torsion protrusion 220 is passed through the limiting hole 312, it can limit the rotation of the tower wheel 300 relative to the large ring gear unit 200 around the axis of the tower wheel 300.

[0050] Furthermore, the side of the large gear ring unit 200 close to the large diameter end 310 of the step pulley 300 has a plurality of anti-torsion protrusions 220 arranged at intervals along the circumference of the large gear ring unit 200; the large diameter end 310 of the step pulley 300 is provided with a plurality of limiting holes 312 arranged at intervals along the circumference of the large diameter end 310, and the plurality of anti-torsion protrusions 220 are correspondingly penetrated in the plurality of limiting holes 312. In this way, the anti-torsion capability can be further improved, and the reliability of the connection between the large gear ring unit 200 and the step pulley 300 can be improved.

[0051] In some other embodiments, the limiting hole 312 may be opened on the large ring gear unit 200 , and the anti-torsion protrusion 220 may be disposed on the step pulley 300 .

[0052] like Figure 1 As shown, the riveted portion 210 and the large ring gear unit 200 are an integral structure, that is, the riveted portion 210 is formed on the large ring gear unit 200 .

[0053] Furthermore, the riveted portion 210 passes through the riveted hole 311 , and one end of the riveted portion 210 away from the large ring gear unit 200 is riveted to be riveted to the step pulley 300 .

[0054] Specifically, the riveted part 210 is inserted into the riveted hole 311 , and one end of the riveted part 210 away from the large gear ring unit 200 passes through the riveted hole 311 . By riveting the end of the riveted part 210 away from the large gear ring unit 200 , the riveted part 210 and the step pulley 300 can be riveted.

[0055] like Figure 1 As shown, further, one end of the hub 100 away from the large ring gear unit 200 is a second reducing section whose diameter gradually increases along a preset direction, and the second reducing section is riveted into the wheel hole 301 of the step pulley 300; wherein the preset direction is the arrangement direction from the large ring gear unit 200 to the large diameter end 310 of the step pulley 300.

[0056] It can be understood that the end of the wheel hub 100 away from the large ring gear unit 200 has a second reducing section, and the diameter of the second reducing section gradually increases along a preset direction. In this way, the second reducing section can be pressed together with the hole wall of the wheel hole 301, thereby improving the connection reliability between the wheel hub 100 and the tower wheel 300.

[0057] The second diameter-changing section may be formed by flanging or riveting at an end of the wheel hub 100 away from the large ring gear unit 200 .

[0058] Furthermore, a positioning groove 110 is provided on the outer side wall of the end of the wheel hub 100 away from the large gear ring unit 200, and the small diameter end 320 of the step pulley 300 is positioned and matched with the positioning groove 110. In this way, the positioning accuracy between the wheel hub 100 and the step pulley 300 can be further improved.

[0059] Embodiment 2

[0060] like Figure 3 As shown, the difference between Example 2 and Example 1 is that the end of the riveted portion 210 away from the large gear ring unit 200 is a first diameter-reducing section whose diameter gradually increases along a preset direction, and the first diameter-reducing section is riveted to the rivet hole 311; wherein the preset direction is the arrangement direction from the large gear ring unit 200 to the large diameter end 310 of the step pulley 300.

[0061] It can be understood that by riveting the end of the rivet portion 210 away from the large gear ring unit 200, the end of the rivet portion 210 away from the large gear ring unit 200 can be made thicker, so that the end of the rivet portion 210 away from the large gear ring unit 200 is pressed together with the hole wall of the rivet hole 311, thereby achieving the fixation of the large gear ring unit 200 and the tower wheel 300.

[0062] Embodiment 3

[0063] like Figure 4 As shown, the differences between the third embodiment and the first embodiment include:

[0064] (1) The riveting part 210 and the large gear ring unit 200 are of a split structure. The large gear ring unit 200 is provided with an assembly hole 201 arranged opposite to the riveting hole 311, and the riveting part 210 is inserted into the assembly hole 201 and the riveting hole 311. The riveting part 210 is a rivet, which is sequentially inserted into the assembly hole 201 and the riveting hole 311, thereby realizing the riveting of the large gear ring unit 200 and the step pulley 300.

[0065] (2) The hub 100 and the small diameter end 320 of the step pulley 300 can be assembled in place without riveting them together.

[0066] Embodiment 4

[0067] like Figure 5 As shown, the difference between Example 4 and Example 3 is that the end of the riveted portion 210 away from the large gear ring unit 200 is a third diameter-reducing section whose diameter gradually increases along a preset direction, and the third diameter-reducing section is riveted to the rivet hole 311; wherein the preset direction is the arrangement direction from the large gear ring unit 200 to the large diameter end 310 of the step pulley 300.

[0068] It can be understood that by riveting the end of the rivet portion 210 away from the large gear ring unit 200, the end of the rivet portion 210 away from the large gear ring unit 200 can be made thicker, so that the end of the rivet portion 210 away from the large gear ring unit 200 is pressed together with the hole wall of the rivet hole 311, thereby achieving the fixation of the large gear ring unit 200 and the tower wheel 300.

[0069] Embodiment 5

[0070] like Figure 6 As shown, the difference between Example 5 and Example 4 is that: the riveted portion 210 and the large gear ring unit 200 are an integral structure, the riveted portion 210 includes an anti-torsion step 211 connected to the large gear ring unit 200, and a connecting portion 212 connected to the anti-torsion step 211, the connecting portion 212 is located on the side of the anti-torsion step 211 away from the large gear ring unit 200; the riveted hole 311 includes an anti-torsion section 3111 and an assembly section 3112 that are interconnected, the assembly section 3112 is located on the side of the anti-torsion section 3111 away from the large gear ring unit 200, the anti-torsion step 211 is penetrated in the anti-torsion section 3111, the connecting portion 212 is penetrated in the assembly section 3112, and one end of the connecting portion 212 away from the anti-torsion step 211 is riveted to form a rivet head 213 riveted to the step wheel 300.

[0071] Specifically, the anti-torsion step 211 cooperates with the anti-torsion section 3111 to mainly improve the anti-torsion capability between the large gear ring unit 200 and the step pulley 300; the rivet joint 213 can prevent the large gear ring unit 200 and the step pulley 300 from being disengaged, and at the same time, can also provide anti-torsion capability.

[0072] It should be noted that, in some other embodiments, the riveted portion 210 may also be an integral structure with the step pulley 300 , and the corresponding riveted holes 311 are provided on the large gear ring unit 200 .

[0073] In the combined flywheel of the present invention, the large ring gear unit 200 is coaxially arranged with the wheel hub 100, and the large ring gear unit 200 and the wheel hub 100 are an integral structure, that is, the large ring gear unit 200 and the wheel hub 100 are made of the same integral material, which is convenient for manufacturing; the riveted part 210 is penetrated through the riveted hole 311, and under the action of the riveted part 210, the large ring gear unit 200 and the step pulley 300 can be fixed, and the large ring gear unit 200 and the step pulley 300 can be reliably connected; in addition, the anti-torsion protrusion 220 is penetrated through the limiting hole 312, so that the risk of relative rotation between the large ring gear unit 200 and the step pulley 300 can be reduced, the anti-torsion ability can be improved, and the reliability of the combined flywheel can be further improved.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A combined flywheel, characterized in that: include: A step pulley, the step pulley having a large diameter end and a small diameter end arranged opposite to the large diameter end, the small diameter end being provided with a wheel hole; Large ring gear unit; A wheel hub integrated with the large gear ring unit, the wheel hub and the large gear ring unit are coaxially arranged, and the wheel hub is inserted into the wheel hole, and the large gear ring unit is arranged opposite to the large diameter end. Among them, one of the large gear ring unit and the large diameter end is provided with a riveted portion, and the other is provided with a riveted hole. The riveted portion is passed through the riveted hole and rivets the large gear ring unit to the step wheel; one of the large gear ring unit and the large diameter end is provided with an anti-torsion protrusion, and the other is provided with a limiting hole. The anti-torsion protrusion is passed through the limiting hole.

2. The combined flywheel according to claim 1, characterized in that: The large diameter end is provided with a plurality of rivet holes, and the plurality of rivet holes are arranged at intervals along the circumference of the large diameter end; The large gear ring unit is provided with a plurality of riveted parts, the plurality of riveted parts are arranged at intervals along the circumference of the large gear ring unit, and the plurality of riveted parts are penetrated into the plurality of riveted holes in a one-to-one correspondence.

3. The combined flywheel according to claim 1, characterized in that: The large gear ring unit is provided with the riveting part, the large diameter end is provided with the riveting hole, the riveting part passes through the riveting hole, and one end of the riveting part away from the large gear ring unit is riveted to be riveted to the step pulley.

4. The combined flywheel according to claim 1, characterized in that: The large gear ring unit is provided with the riveting portion, the large diameter end is provided with the riveting hole, the end of the riveting portion away from the large gear ring unit is a first diameter reducing section whose diameter gradually increases along a preset direction, and the first diameter reducing section is riveted into the riveting hole; Wherein, the preset direction is the arrangement direction from the large ring gear unit to the large diameter end.

5. The combined flywheel according to claim 1, characterized in that: The riveted portion and the large gear ring unit are an integral structure; or, the large gear ring unit is provided with an assembly hole arranged opposite to the riveted hole, the riveted portion and the large gear ring unit are a split structure, and the riveted portion is penetrated through the assembly hole.

6. The combined flywheel according to claim 1, characterized in that: The wheel hub is riveted to the hole wall of the wheel hole.

7. The combined flywheel according to claim 6, characterized in that: One end of the wheel hub away from the large gear ring unit is a second diameter-reducing section whose diameter gradually increases along a preset direction, and the second diameter-reducing section is riveted into the wheel hole; Wherein, the preset direction is the arrangement direction from the large ring gear unit to the large diameter end.

8. The combined flywheel according to claim 1, characterized in that: A positioning groove is provided on the outer side wall of one end of the wheel hub away from the large gear ring unit, and the small diameter end is positioned and matched with the positioning groove.

9. The combined flywheel according to claim 1, characterized in that: The side of the large gear ring unit close to the large diameter end has a plurality of anti-torsion protrusions arranged at intervals along the circumference of the large gear ring unit; The large diameter end is provided with a plurality of the limiting holes spaced apart along the circumference of the large diameter end, and the plurality of the anti-torsion protrusions are passed through the plurality of limiting holes in a one-to-one correspondence.

10. The combined flywheel according to claim 1, characterized in that: The riveted portion includes an anti-torsion step and a connecting portion connected to the anti-torsion step; The riveting hole comprises an anti-torsion section and an assembly section which are interconnected, the anti-torsion step is passed through the anti-torsion section, the connecting portion is passed through the assembly section, and one end of the connecting portion away from the anti-torsion step is riveted to form a riveted joint.

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