Shock-proof headstock bowl for electric power-assisted bicycle

Abstract

The utility model discloses a shock-proof headstock for an electric power-assisted bicycle. The shock-proof headstock comprises a lower plug and a bearing bowl, the bearing bowl is fixedly pressed in a lower pipe opening of the bicycle head pipe, and the lower plug is fixedly sleeved on the front fork; an outer chamfer formed by the lower plug is matched with an inner chamfer formed by the inner ring of the bearing bowl in a supporting manner, an assembly groove is further formed in the top surface of the lower plug, a PU gasket is positioned and clamped in the assembly groove, and a wear-resistant sheet is arranged on the annular top surface of the PU gasket in an anti-rotation manner; a pressure-bearing edge facing outwards in the radial direction is formed at the lower end of the bearing bowl outer ring, the bottom face of the pressure-bearing edge exerts pressure on the top face of the wear-resisting piece, and the wear-resisting piece is matched with the bottom face of the pressure-bearing edge in a friction rotation mode to generate a damping effect when the front fork rotates. The shock-proof device is simple in structure and easy to assemble, and can effectively prevent the shock of the electric power-assisted bicycle from being transmitted to a handlebar through a front fork to cause potential safety hazards to riding.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle parts, in particular to a shock-absorbing headstock for an electric power-assisted bicycle. Background Art

[0002] Cycling culture has rapidly grown globally in recent years, with more and more people participating in various cycling activities. Conventional bicycles rely solely on human power, making them difficult to ride over long distances or uphill. While electric bicycles are labor-efficient, they are relatively heavy and unsuitable for casual urban riding. Electric-assisted bicycles combine the advantages of both, offering a superior solution.

[0003] The batteries of many electric-assisted bicycles are installed on the downtube of the frame, which will reduce the rigidity of the frame to a certain extent; or the electric-assisted bicycle is loaded with heavy objects, causing the center of gravity of the vehicle to shift; or when the electric-assisted bicycle is ridden at high speed, the frame is prone to vibration, and this vibration will be transmitted to the front fork through the head tube of the frame, and then to the handlebars, making it difficult for the rider to control the direction of the handlebars. At the very least, the hands will be hurt by the vibration, and at worst, the center of gravity will be unstable and the body will overturn. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a shock-absorbing headstock for an electric power-assisted bicycle with a simple structure, simple assembly, and the ability to effectively prevent vibration from being transmitted to the front fork through the head tube, in response to the status quo of the above-mentioned prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A shock-absorbing headstock for an electric-assisted bicycle comprises a lower plug and a bearing bowl consisting of an inner ring, a steel ball and an outer ring; the bearing bowl is fixedly press-fitted into the lower tube opening of the head tube, and the lower plug is fixedly sleeved on the front fork; the outer chamfer formed on the lower plug cooperates with the inner chamfer support formed on the inner ring of the bearing bowl, and a circle of assembly grooves is further formed on the top surface of the lower plug on the outer periphery of the outer chamfer, a PU gasket is positioned and mounted in the assembly groove, and a wear-resistant sheet is provided on the annular top surface of the PU gasket for anti-rotation; a radially outward pressure-bearing edge is formed on the lower end of the outer ring of the bearing bowl, and the bottom surface of the pressure-bearing edge presses on the top surface of the wear-resistant sheet, and the wear-resistant sheet cooperates with the bottom surface of the pressure-bearing edge to produce a damping effect when the front fork rotates.

[0007] To optimize the above technical solutions, specific measures taken also include:

[0008] The front fork is formed with an annular support table, and the circular bottom surface of the lower plug cooperates with the annular support table of the front fork for positioning support; the inner hole wall of the lower plug is tightly fitted with the cylindrical assembly surface of the front fork.

[0009] The above-mentioned bearing bowl is hard-pressed into the lower tube opening of the head tube. The outer peripheral surface of the outer ring of the bearing bowl is tightly matched with the inner wall of the lower tube opening of the head tube, and the port plane of the lower tube opening is positioned in conjunction with the top surface of the pressure-bearing edge of the outer ring.

[0010] The top surface of the PU gasket is processed with six positioning holes of equal arc, and the bottom surface of the wear-resistant sheet (7) is formed with six positioning protrusions, which are matched with the positioning holes for positioning insertion.

[0011] The positioning hole is a tapered hole with a large upper opening diameter and a small bottom diameter, and the positioning boss is a hollow tapered column with a small lower end diameter and a large upper end diameter.

[0012] Compared to existing technologies, the shock-absorbing front bowl of this utility model includes a lower plug, a bearing bowl, a PU washer, and a wear-resistant sheet. The bottom surface of the bearing bowl's pressure-bearing edge applies pressure to the top surface of the wear-resistant sheet, which is in turn positioned on the PU washer. When the front fork rotates, the wear-resistant sheet and the bottom surface of the pressure-bearing edge rotate together to produce a damping effect. This damping effect effectively prevents frame vibration from being transmitted to the front fork, eliminating vibration and yaw of the handlebar during riding, and ensuring riding safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the exploded structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the partially exploded structure of the utility model;

[0016] Figure 4 The utility model is a schematic diagram of the assembly structure of the bicycle head pipe and the bicycle front fork. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0018] Figures 1 to 4 It is a structural diagram of the present utility model.

[0019] The accompanying drawings are marked as follows: inner ring 1, inner chamfer 11, steel ball 2, outer ring 3, pressure-bearing edge 31, bearing bowl 4, lower plug 5, assembly groove 5a, inner hole wall 5b, outer chamfer 51, circular ring bottom surface 52, PU gasket 6, positioning hole 6a, wear-resistant plate 7, positioning boss 71, front fork 8, cylindrical assembly surface 81, annular support table 82, and head tube 9.

[0020] like Figure 1 and Figure 4As shown, the utility model discloses a shock-absorbing front bowl for an electric-assisted bicycle. The shock-absorbing front bowl has a simple structure, is easy to assemble, and is lightweight. It can effectively prevent vibrations caused by insufficient frame strength, unstable center of gravity, and excessive speed of the electric-assisted bicycle from being transmitted to the front fork and then to the handlebars, thereby causing safety hazards to riding.

[0021] like Figure 4 As shown, the present invention discloses a shock-absorbing headstock for an electric-assisted bicycle, comprising a lower plug 5, a bearing bowl 4, a PU washer 6, and a wear-resistant sheet 7. The bearing bowl 4 is an integrated component consisting of an inner ring 1, a steel ball 2, and an outer ring 3. The inner ring 1 can rotate freely relative to the outer ring 3 via the steel ball 2. The bearing bowl 4 is fixedly press-fitted into the lower tube opening of the head tube 9 via its outer ring 3, and the lower plug 5 is fixedly sleeved on the front fork 8. After the front fork 8 is inserted into the head tube 9, the outer chamfer 51 formed on the lower plug 5 is supported and matched with the inner chamfer 11 formed on the inner ring 1 of the bearing bowl 4, thereby allowing the front fork 8 to rotate freely relative to the head tube 9 via the bearing bowl 4.

[0022] In order to prevent or reduce the vibration of the frame from being transmitted to the front fork 8 through the head tube 9 of the frame, Figure 2 As shown, the top surface of the lower plug 5 of the present invention is also formed with a circle of assembly groove 5a on the outer periphery of the outer chamfer 51, and a PU gasket 6 is positioned in the assembly groove 5a. A wear-resistant sheet 7 is provided on the annular top surface of the PU gasket 6, and it is required that the wear-resistant sheet 7 cannot rotate relative to the PU gasket 6. Figure 3 As shown, the lower end of the outer ring 3 of the bearing bowl 4 of the present invention is formed with a radially outward-facing pressure-bearing edge 31. The bearing bowl 4 is pressed into the lower tube opening of the head tube 9. The flat surface of the lower tube opening of the head tube 9 aligns with the top surface of the pressure-bearing edge 31 of the outer ring 3. The bottom surface of the pressure-bearing edge 31 then applies pressure to the top surface of the wear plate 7. The PU washer 6 is made of a material called polyurethane (polyurethane) in Chinese. When the frame vibrates, the wear plate 7 withstands pressure from the bearing bowl 4. The PU washer 6 releases elasticity due to its physical properties to support the wear plate 7. When the front fork 8 rotates relative to the head tube 9, the wear plate 7 rotates frictionally with the bottom surface of the pressure-bearing edge 31. At this time, under the supporting force of the PU washer 6, the wear plate 7 and the pressure-bearing edge 31 of the bearing bowl 4 produce a damping effect. This damping effect effectively prevents frame vibration from being transmitted to the front fork, eliminating handlebar shake and yaw during riding, and ensuring riding safety.

[0023] In the embodiment Figure 2 and Figure 4 As shown, the front fork 8 of the present invention is formed with an annular support table 82, and the circular bottom surface 52 formed on the lower plug 5 cooperates with the annular support table 82 of the front fork 8 for positioning and support; the inner hole wall 5b of the lower plug 5 is tightly fitted with the cylindrical assembly surface 81 of the front fork 8.

[0024] In the embodiment, the bearing bowl 4 of the present invention is hard-pressed into the lower tube opening of the head tube 9. After press-fitting, the outer peripheral surface of the outer ring 3 of the bearing bowl 4 is tightly fitted with the inner wall of the lower tube opening of the head tube 9. After press-fitting into place, the port plane of the lower tube opening of the head tube 9 should be pressed onto the top surface of the pressure-bearing edge 31 of the outer ring 3.

[0025] In the embodiment Figure 2 As shown, the top surface of the PU gasket 6 of the present invention has a positioning hole 6a, and the bottom surface of the wear-resistant sheet 7 is formed with a positioning protrusion 71. During installation, the positioning protrusion 71 of the wear-resistant sheet 7 is inserted into the positioning hole 6a of the PU gasket 6, thereby preventing the wear-resistant sheet 7 from rotating relative to the PU gasket 6. The number of positioning holes 6a and positioning protrusions 71 can be one each, or can be set according to the situation. In the present invention, six of each are preferably formed.

[0026] In the embodiment Figure 1 As shown,

[0027] The positioning hole 6a of the present invention is a tapered hole with a large diameter at the top and a small diameter at the bottom, and the positioning boss 71 is a hollow tapered column with a small diameter at the bottom and a large diameter at the top.

[0028] The utility model discloses a shock-absorbing headstock for an electric power-assisted bicycle, which can effectively prevent the vibration of the frame from being transmitted to the handlebars through the front fork and causing safety hazards during riding through the damping effect between the lower plug and the bearing bowl, eliminates the shaking and swaying of the handlebars during riding, and ensures riding safety.

[0029] The best embodiment of the present invention has been described, and various changes or modifications made by ordinary technicians in this field will not depart from the scope of the present invention.

Claims

1. A shock-absorbing headstock for an electric-assisted bicycle, comprising a lower plug (5) and a bearing bowl (4) consisting of an inner ring (1), a steel ball (2) and an outer ring (3); the bearing bowl (4) is fixedly press-fitted into the lower tube opening of the head tube (9), and the lower plug (5) is fixedly sleeved on the front fork (8); and the characteristics are: The outer chamfer (51) formed on the lower plug (5) is supported by the inner chamfer (11) formed on the inner ring (1) of the bearing bowl (4). A circle of assembly groove (5a) is also formed on the top surface of the lower plug (5) on the outer periphery of the outer chamfer (51). A PU gasket (6) is positioned in the assembly groove (5a). The anti-rotation pad on the annular top surface of the PU gasket (6) is provided with a wear-resistant plate (7); the lower end of the outer ring (3) of the bearing bowl (4) is formed with a radially outward pressure-bearing edge (31), and the bottom surface of the pressure-bearing edge (31) is pressed on the top surface of the wear-resistant plate (7). When the front fork (8) rotates, the wear-resistant plate (7) cooperates with the bottom surface of the pressure-bearing edge (31) to produce a damping effect.

2. The shock-absorbing headstock for an electric-assisted bicycle according to claim 1, characterized in that: The front fork (8) is formed with an annular support table (82), and the annular bottom surface (52) of the lower plug (5) cooperates with the annular support table (82) of the front fork (8) for positioning support; the inner hole wall (5b) of the lower plug (5) is tightly fitted with the cylindrical assembly surface (81) of the front fork (8).

3. The shock-absorbing headstock for an electric-assisted bicycle according to claim 2, characterized in that: The bearing bowl (4) is hard-pressed into the lower tube opening of the head tube (9), and the outer peripheral surface of the outer ring (3) of the bearing bowl (4) is tightly matched with the inner wall of the lower tube opening of the head tube (9), and the port plane of the lower tube opening is positioned in conjunction with the top surface of the pressure-bearing edge (31) of the outer ring (3).

4. The shock-absorbing headstock for an electric-assisted bicycle according to claim 3, characterized in that: The top surface of the PU gasket (6) is processed with six positioning holes (6a) of equal arc, and the bottom surface of the wear-resistant plate (7) is formed with six positioning protrusions (71), and the positioning protrusions (71) are matched with the positioning holes (6a) for positioning insertion.

5. The shock-absorbing headstock for an electric-assisted bicycle according to claim 4, characterized in that: The positioning hole (6a) is a tapered hole with a large diameter at the upper opening and a small diameter at the bottom, and the positioning boss (71) is a hollow tapered column with a small diameter at the lower end and a large diameter at the upper end.

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