Ratchet structure, ratchet assembly, hub, freehub body and hub assembly

Abstract

A ratchet structure, a ratchet assembly, a hub (2), a freehub body (7) and a hub assembly. The ratchet assembly comprises a first ratchet (3) and a second ratchet (5); the first ratchet (3) comprises a first ring body (30); one side of the first ring body (30) is provided with a plurality of first ratchet teeth (35), and the other side of the first ring body (30) is provided with at least two first protruding positioning members (31) used for male-female mating; the second ratchet (5) comprises a second ring body; one side of the second ring body is provided with a plurality of second ratchet teeth (55), and the other side of the second ring body is provided with at least two second protruding positioning members (51, 52) for male-female mating; and the first ratchet teeth (35) and the second ratchet teeth (55) are in full engagement. The whole hub assembly is of a modular structural design, and maintenance is convenient and fast; and in addition, a ratchet transmission structure adopts a male-female mating member, thereby avoiding jamming or idling caused by sand and mud entering spline gaps.

Description

A ratchet structure, assembly, hub, freehub and hub assembly Technical Field

[0001] The utility model relates to the technical field of vehicle accessories, and in particular to a ratchet structure, a ratchet assembly, a hub, a freehub and a hub assembly of an AOTOAO ratchet system. Background Art

[0002] Various cycling sports and equipment such as electric bicycles for transportation and mountain bikes for fitness are becoming more and more popular. How to provide cycling equipment with higher transmission efficiency and better user experience has become the focus of many designers.

[0003] Referring to FIG. 1 , a conventional full-tooth engagement ratchet assembly is shown, comprising an upper ratchet 102 and a lower ratchet 105. Upper ratchet 102 is provided with a plurality of upper ratchet teeth, such as upper ratchet teeth 104, at its bottom. Upper ratchet 102 is also provided with a plurality of upper splines, such as upper spline 103, along its circumference for positioning and assembly with the hub body. Lower ratchet 105 is provided with a plurality of lower ratchet teeth, such as lower ratchet teeth 107, at its top for engaging with the upper ratchet teeth. Lower ratchet 105 is also provided with a plurality of lower splines, such as lower spline 103, along its circumference for positioning and assembly with the freewheel body housing. Upper ratchet 102 abuts against hub spring 101 on one side and is assembled into the hub housing via the upper splines. Lower ratchet 105 abuts against freewheel body spring 108 on one side and is assembled into the freewheel body housing via the lower splines.

[0004] Or as shown in Figure 2, the ratchet assembly includes an upper ratchet 202 and a lower ratchet 206. The upper ratchet 202 has a ratchet step 203 formed on the upper part of the ratchet tooth 205, and a spline 204 formed on the outer circumference of the step 203. The lower ratchet 206 has a ratchet step 207 formed on the lower part of the ratchet tooth 209, and a spline 208 formed on the outer circumference of the step 207. The above two spline structures are used to position and assemble with the corresponding hub shell or freehub base shell. One side of the upper ratchet 202 abuts against the hub spring 201 and is assembled in the hub shell through the spline, and one side of the lower ratchet 206 abuts against the freehub base spring 210 and is assembled in the freehub base shell through the spline.

[0005] However, during riding, mud and sand can easily penetrate into the hub or the freehub through the gaps in the splines of the above two types of ratchet structures, causing the ratchet teeth of the upper and lower ratchet wheels to become immobile, resulting in jamming or idling.

[0006] In addition, the above two types of ratchet structures that use spline matching have a large spring set between the hub and the ratchet assembly, as well as between the ratchet assembly and the tower base to achieve full tooth engagement. This can easily lead to an imbalance in elastic force, resulting in the upper and lower ratchets not being fully engaged, and tooth slippage, affecting the riding experience.

[0007] Summary of the Invention

[0008] Based on this, in order to solve the above-mentioned technical problems in traditional technology, the utility model proposes an AOTOAO ratchet system with multiple compression springs that can balance the elastic force to ensure that the upper and lower ratchets are fully engaged and do not slip, and the ratchet transmission adopts a concave-convex fit to avoid jamming or idling. The ratchet structure, components, hub, freehub and hub components of the system are provided.

[0009] In a first aspect, the utility model relates to a ratchet structure, comprising a first ratchet, the first ratchet comprising a first ring body, a plurality of first ratchet teeth being arranged on one side of the first ring body, and at least two first protruding positioning members for achieving concave-convex matching being arranged on the other side of the first ring body.

[0010] In the second aspect, the utility model relates to a ratchet assembly, comprising a first ratchet and a second ratchet, the first ratchet comprising a first ring body, a plurality of first ratchet teeth being arranged on one side of the first ring body, and at least two first protruding positioning members for achieving concave-convex matching being arranged on the other side of the first ring body, the second ratchet comprising a second ring body, a plurality of second ratchet teeth being arranged on one side of the second ring body, and at least two second protruding positioning members for achieving concave-convex matching being arranged on the other side of the ring body, the first ratchet teeth being fully engaged with the second ratchet teeth.

[0011] In the third aspect, the utility model relates to a hub, comprising a hub shell, a core shaft and a first ratchet, the hub shell forming a hollow assembly cover on one side, at least two first positioning grooves being arranged on the bottom wall of the assembly cover, the first ratchet passing through the core shaft and comprising a first ring body, a plurality of first ratchet teeth being arranged on one side of the first ring body, and at least two first protruding positioning members for achieving concave-convex matching being arranged on the other side of the first ring body, the at least two first protruding positioning members being able to slide in the first positioning grooves corresponding to the bottom wall.

[0012] In the fourth aspect, the utility model relates to a tower base, comprising a tower base shell and a second ratchet for fully engaging with the first ratchet of weight 5 or weight 6, the tower base shell being provided with at least two second positioning grooves at one end, the second ratchet comprising a second ring body, a plurality of second ratchet teeth being provided on one side of the second ring body, and at least two second protruding positioning members for achieving concave-convex matching being provided on the other side of the second ring body, the at least two second protruding positioning members being able to slide in the second positioning grooves corresponding to the tower base.

[0013] In the fifth aspect, the utility model relates to a wheel hub assembly, comprising a hub, a freehub and a ratchet assembly, the ratchet assembly comprising a first ratchet and a second ratchet, the hub forming a hollow assembly cover on one side, at least two first positioning grooves being arranged on the bottom wall of the assembly cover; the freehub being provided with at least two second positioning grooves at one end; the first ratchet comprising a first ring body, a plurality of first ratchet teeth being arranged on one side of the first ring body, at least two first protruding positioning members for achieving concave-convex matching being arranged on the other side of the first ring body, the second ratchet comprising a second ring body, a plurality of second ratchet teeth being arranged on one side of the second ring body, at least two second protruding positioning members for achieving concave-convex matching being arranged on the other side of the ring body, the first ratchet being fully engaged with the second ratchet; the at least two first protruding positioning members can slide in the corresponding first positioning grooves, and the at least two second protruding positioning members can slide in the corresponding second positioning grooves.

[0014] The ratchet structure, components, hub, freehub, and hub assembly of the AOTOAO ratchet system are shown in Figures 13 and 14. The hub is equipped with the first ratchet, and the freehub is combined with the second ratchet. The overall modular design makes maintenance easy and quick. The ratchet drive adopts a concave-convex transmission to prevent mud and sand from infiltrating and causing the hub to stick or idle, thus improving the user's riding experience.

[0015] Furthermore, the ratchet structure, assembly, hub, freehub, and hub assembly of the AOTOAO ratchet system of the present invention feature multiple compression springs for equalizing elasticity between the first ratchet and the hub, and between the second ratchet and the freehub, ensuring that the first and second ratchet teeth fully engage and prevent slippage. Multiple small springs on either side of the ratchet assembly balance the elastic forces between the hub and the first ratchet, and between the second ratchet and the freehub, preventing slippage caused by incomplete engagement between the first and second ratchet teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] in:

[0018] FIG1 is a structural diagram of a ratchet assembly in the prior art;

[0019] FIG2 is a structural diagram of another ratchet assembly in the prior art;

[0020] FIG3 is a perspective structural diagram of the wheel hub assembly of the present invention;

[0021] FIG4 is a cross-sectional structural diagram of the hub assembly of the present invention along the centerline of the shaft core;

[0022] FIG5 is a partial enlarged view of portion A shown in FIG4 ;

[0023] FIG6 is an exploded structural diagram of the wheel hub assembly of the present invention;

[0024] FIG7 is a schematic diagram of the assembly of the ratchet assembly of the hub assembly of the present invention;

[0025] FIG8 is a schematic diagram of the combined arrangement structure of the first positioning groove and the first spring groove of the hub of the present invention;

[0026] FIG9 is a schematic diagram of the combined arrangement structure of the second positioning groove and the second spring groove of the tower base of the present invention;

[0027] FIG10 is a schematic structural diagram of a first embodiment of a single ratchet structure of the present invention;

[0028] FIG11 is a centerline cross-sectional structural diagram of a single ratchet structure of the present invention;

[0029] FIG12 is an assembly diagram of the ratchet assembly and the compression springs on both sides of the present invention;

[0030] FIG13 is a schematic diagram of the assembly of the hub and the first ratchet wheel of the present invention;

[0031] FIG14 is a schematic diagram of the assembly of the freehub and the second ratchet of the present invention;

[0032] FIG15 is a schematic structural diagram of a second embodiment of a single ratchet structure of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Please refer to Figures 3, 4 and 6, which show the hub assembly of the AOTOAO ratchet system according to an embodiment of the present application, including a hub 2, a ratchet assembly and a freehub 7. The ratchet assembly includes a first ratchet 3 and a second ratchet 5.

[0035] The hub 2 includes a hub shell 21. A first mounting portion 25 for mounting spokes is provided at one end of the hub shell 21, and a second mounting portion 26 for mounting spokes is provided at the other end. A hollow mounting cover 261 is formed within the second mounting portion 26 of the hub shell 21, and an axle core hole 27 is formed at the bottom of the mounting cover 261. At least two first positioning grooves, such as the first positioning groove 263 shown in Figure 7, are provided on a bottom wall 262 surrounding the axle core hole 27 of the mounting cover 261.

[0036] The bottom wall 262 of the assembly cover 261 defines at least two first spring slots, such as first spring slot 264. In the embodiment shown in FIG8 , eight first spring slots are provided on the bottom wall 262 of the hub 2. The number of first springs is determined by the number of concave and convex positioning members. A first spring is housed in each first spring slot. For example, first spring 41 is housed in first spring slot 264 shown in FIG7 .

[0037] The first ratchet 3 forms a concave-convex transmission fit with the first positioning groove, and the second ratchet 5 forms a concave-convex transmission fit with the second positioning groove of the tower base. The first ratchet teeth are fully engaged with the second ratchet teeth.

[0038] Referring to Figure 6 , the hub shell 21 is provided with an axle core 1, which is mounted on the hub shell 21 with a first bearing 12 and a second bearing 14. An assembly cover 26 is formed on one side of the second bearing 14, and a first sleeve 13 is mounted on the axle core 1 within the assembly cover 26. The hub shell 21 is provided with a first liner 22, which is installed in a plug-and-play manner, on one side of the first bearing 12. In other embodiments, the first liner 22 may also be threadedly connected to the axle core 1.

[0039] Referring to Figures 7 and 9 , the freewheel base 7 includes a freewheel base shell 71 and a mounting portion 75 disposed at one end of the freewheel base shell 71. A freewheel base shaft core hole 72 is disposed in the center of the mounting portion 75. Several second positioning slots and several second spring slots are defined on the side of the mounting portion 75 near the ratchet assembly, such as the second positioning slot 751 and second spring slot 752 shown in Figure 9 .

[0040] The shaft core 1 passes through the freewheel base housing 71, and a third bearing 75 and a fourth bearing 76 are disposed within the freewheel base housing 71. A second sleeve 74 is sleeved over the shaft core 1, and the third bearing 72 and the fourth bearing 73 are restrained within the freewheel base housing 71 by this second sleeve 74. A second liner 77 is installed on the side of the freewheel base housing 71 away from the hub 2, and a threaded anti-loosening ring is mounted on the outside of the second liner 71.

[0041] As shown in Figure 9, the freewheeling base shell 71 is provided with at least two second positioning slots at one end, such as second positioning slot 751. In the embodiment shown in Figure 9, the freewheeling base 7 is provided with a total of eight second positioning slots, the number of which is determined by the number of locating members that fit into the concave and convex portions. The freewheeling base shell 71 further has second spring slots at one end, such as second spring slot 752 shown in Figure 9, on either side of the corresponding second positioning slots. The number of these second spring slots is determined by the number of second springs to be accommodated. Each second spring slot houses a second spring, such as second spring slot 752 shown in Figure 7, which houses second spring 61.

[0042] In this embodiment, the first ring of the first ratchet 3 is provided with at least two first springs on one side of the first protruding positioning member, and the second ring of the second ratchet 5 is provided with at least two second springs on one side of the second protruding positioning member. The first springs abut against the first ring from one side of the first protruding positioning member. The second springs abut against the second ring from one side of the second protruding positioning member.

[0043] Multiple compression springs, such as first spring 41, are positioned between the first ratchet 3 and the hub 1 to balance the forces. Multiple compression springs, such as second spring 61, are positioned between the second ratchet 5 and the freehub 7 to balance the forces. After the first and second ratchet 3 and 5 fully engage, the compression springs on either side apply force to the ratchet assembly to ensure that the first and second ratchet teeth are fully engaged and prevent slippage. Multiple small springs on either side of the ratchet assembly balance the forces between the hub and the first ratchet, and between the second ratchet and the freehub, preventing slippage caused by incomplete engagement between the first and second ratchet teeth.

[0044] Referring to Figures 6, 7, 8, 9, 10, and 12, the ratchet assembly 6 includes a first ratchet 3 and a second ratchet 5. As shown in Figure 10, the first ratchet 3 includes a first ring 30. One side of the first ring 30 is provided with a plurality of first ratchet teeth, such as first ratchet teeth 35. On the other side of the first ring 30, at least two first protruding locating members, such as first protruding locating members 31, are provided for achieving a concave-convex coupling. In the embodiment shown in Figure 9, there are eight first protruding locating members. Each first protruding locating member slides within a corresponding first locating groove of the hub 2. For example, the first protruding locating member 31 shown in Figure 7 can move back and forth within the first locating groove 263 of the bottom wall 262 of the hub 2 during the concave-convex coupling. In this embodiment, the first protruding locating members function to achieve a concave-convex coupling with the hub. In preferred embodiments, the first protruding locating members are cylindrical, truncated, or prism-shaped, with a cross-section that is elliptical, circular, triangular, rhombus-shaped, or polygonal.

[0045] The first ratchet 3 is similar in structure to the second ratchet 5. The second ratchet 5 comprises a second ring body, one side of which is provided with a plurality of second ratchet teeth, such as the second ratchet teeth 55 shown in Figure 12. On the other side of the second ring body are at least two second raised locating members for achieving a concave-convex coupling, such as the second raised locating member 51 shown in Figure 7 and the second raised locating member 52 shown in Figure 12. In the embodiment shown in Figure 12, eight second raised locating members are provided. Each second raised locating member slides within a corresponding second locating groove in the freehub base 7. For example, the second raised locating member 51 shown in Figure 9 can move back and forth within the first locating groove 263 in the bottom wall 262 of the freehub base 7 during a concave-convex coupling. In this embodiment, the second raised locating members function to achieve a concave-convex coupling of the freehub base. In preferred embodiments, the second raised locating members are cylindrical, frustum-conical, or prism-shaped, with cross-sections of elliptical, circular, triangular, rhombus-shaped, or polygonal shapes.

[0046] As shown in FIG. 7 , the first ratchet teeth of the first ratchet wheel 3 are fully engaged with the second ratchet teeth of the second ratchet wheel 5 .

[0047] The ratchet structure, assembly, hub, freehub and hub assembly of the utility model adopt concave-convex matching transmission in the ratchet drive, which can prevent the hub from getting stuck or idling due to the infiltration of mud and sand.

[0048] As shown in Figures 13 and 14 , the hub assembly of the present embodiment includes a hub 2, a ratchet assembly, and a freehub 7. The hub 2 can be assembled with a first ratchet 3 for modular use. The freehub 7 can also be assembled with a second ratchet 5 for modular use. The overall modular design allows for quick and easy maintenance.

[0049] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A ratchet structure, characterized in that: It comprises a first ratchet, which comprises a first ring body, a plurality of first ratchet teeth are arranged on one side of the first ring body, and at least two first protruding positioning members for realizing concave-convex matching are arranged on the other side of the first ring body.

2. The ratchet structure according to claim 1, characterized in that: The at least two first protruding positioning members can slide in the corresponding first positioning grooves, and the first protruding positioning members are in the shape of a column, a frustum, or a prism structure, and their cross-section shape is an ellipse, a circle, a triangle, a rhombus, or a polygon.

3. A ratchet assembly, characterized in that: It includes a first ratchet and a second ratchet, the first ratchet includes a first ring body, a plurality of first ratchet teeth are arranged on one side of the first ring body, and at least two first protruding positioning parts for realizing concave-convex matching are arranged on the other side of the first ring body; the second ratchet includes a second ring body, a plurality of second ratchet teeth are arranged on one side of the second ring body, and at least two second protruding positioning parts for realizing concave-convex matching are arranged on the other side of the ring body, and the first ratchet teeth are fully engaged with the second ratchet teeth.

4. The ratchet assembly according to claim 3, characterized in that: The at least two first protruding positioning members can slide in the corresponding first positioning grooves, and the at least two second protruding positioning members can slide in the corresponding second positioning grooves. The first protruding positioning member and the second protruding positioning member are cylindrical, frustum-shaped, or prism-shaped, and their cross-sectional shapes are elliptical, circular, triangular, rhombus-shaped, or polygonal. The first ring body is provided with at least two first springs on one side of the first protruding positioning member, and the second ring body is installed with at least two second springs on one side of the second protruding positioning member.

5. A hub, characterized in that: It includes a hub shell, a core shaft and a first ratchet, wherein the hub shell forms a hollow assembly cover on one side, and at least two first positioning grooves are arranged on the bottom wall of the assembly cover. The first ratchet passes through the core shaft and includes a first ring body, a plurality of first ratchet teeth are arranged on one side of the first ring body, and at least two first protruding positioning members for achieving concave-convex matching are arranged on the other side of the first ring body, and the at least two first protruding positioning members can slide in the first positioning grooves corresponding to the bottom wall.

6. The hub according to claim 5, characterized in that: The bottom wall also has at least two first spring grooves, in which the first springs are placed, and the first springs are pressed against the first ring body from one side of the first protruding positioning piece; the first protruding positioning piece is in the shape of a column, a truncated cone, or a prism structure, and its cross-section is in the shape of an ellipse, a circle, a triangle, a rhombus, or a polygon.

7. A tower foundation, characterized in that: It includes a tower base shell and a second ratchet for fully toothed engagement with the first ratchet of weight 5 or weight 6, the tower base shell is provided with at least two second positioning grooves at one end, the second ratchet includes a second ring body, a plurality of second ratchet teeth are provided on one side of the second ring body, and at least two second protruding positioning members for achieving concave-convex matching are provided on the other side of the second ring body, and the at least two second protruding positioning members can slide in the second positioning grooves corresponding to the tower base.

8. The tower foundation according to claim 7, characterized in that: At least two second spring grooves are also provided at one end of the tower base shell, and the second springs are placed in the second spring grooves. The second springs are pressed against the second ring body from one side of the second protruding positioning member; the second protruding positioning member is in the shape of a column, a truncated cone, or a prism structure, and its cross-section is in the shape of an ellipse, a circle, a triangle, a rhombus, or a polygon.

9. A hub assembly, comprising a hub, a freehub and a ratchet assembly, characterized in that: The ratchet assembly includes a first ratchet and a second ratchet, a hollow assembly cover is formed on one side of the hub, and at least two first positioning grooves are arranged on the bottom wall of the assembly cover; at least two second positioning grooves are arranged at one end of the tower base; the first ratchet includes a first ring body, a plurality of first ratchet teeth are arranged on one side of the first ring body, and at least two first protruding positioning members for realizing concave-convex matching are arranged on the other side of the first ring body; the second ratchet includes a second ring body, a plurality of second ratchet teeth are arranged on one side of the second ring body, and at least two second protruding positioning members for realizing concave-convex matching are arranged on the other side of the ring body, and the first ratchet teeth are fully engaged with the second ratchet teeth; the at least two first protruding positioning members can slide in the corresponding first positioning grooves, and the at least two second protruding positioning members can slide in the corresponding second positioning grooves.

10. The wheel hub assembly according to claim 9, characterized in that: The first protruding positioning member and the second protruding positioning member are in the shape of a column, a truncated cone, or a prism structure, and their cross-sectional shapes are elliptical, a racetrack, a cylinder, a triangle, a rhombus, or a polygon; the first ring body is provided with at least two first springs on one side of the at least two first protruding positioning members, and the second ring body is provided with at least two second springs on one side of the at least two second protruding positioning members.

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