Shock-proof headstock bowl for electric power-assisted bicycle

Abstract

The invention 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 anti-vibration device is simple in structure and easy to assemble, and can effectively prevent the vibration 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 invention relates to the technical field of bicycle parts, in particular to a shock-absorbing head cup for an electric power-assisted bicycle. Background Art

[0002] In recent years, cycling culture has developed rapidly around the world, and more and more people are participating in various cycling activities. Ordinary bicycles rely purely on human power to ride, which is more laborious when riding long distances or climbing hills; although electric bicycles are labor-saving, they are relatively bulky and not suitable for light urban riding. Electric-assisted bicycles combine the advantages of both and become a better solution.

[0003] The batteries of many electric-assisted bicycles are installed on the lower tube 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, which 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. In the mildest case, the hands will be hurt by the vibration, and in the worst case, 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 present invention is to provide a shock-absorbing head cup 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 pipe in view of the current status of the above-mentioned prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A shock-absorbing head bowl for an electric power-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 pressed into the lower pipe 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 formed on the top surface of the lower plug at the outer periphery of the outer chamfer, a PU gasket is positioned in the assembly groove, and a wear-resistant sheet is provided on the annular top surface of the PU gasket to prevent 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 is pressed 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.

[0006] To optimize the above technical solutions, the specific measures taken also include: The front fork is formed with an annular support table, and the annular 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.

[0007] The 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 to match the top surface of the pressure-bearing edge of the outer ring.

[0008] 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 convex columns, which are matched with the positioning holes for positioning insertion.

[0009] The positioning hole is a tapered hole with a large diameter at the upper hole opening and a small diameter at the hole bottom, and the positioning boss is a hollow tapered column with a small diameter at the lower end and a large diameter at the upper end.

[0010] Compared with the prior art, the shock-absorbing front bowl of the present invention includes a lower plug, a bearing bowl, a PU washer and a wear-resistant sheet. The bottom surface of the pressure-bearing edge of the bearing bowl is pressed on the top surface of the wear-resistant sheet, and the wear-resistant sheet is positioned and installed on the PU washer. When the front fork rotates, the wear-resistant sheet and the bottom surface of the pressure-bearing edge rotate in friction with each other to produce a damping effect. This damping effect can effectively prevent the vibration of the frame from being transmitted to the front fork, eliminate the shaking and deflection of the handlebar during riding, and ensure riding safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the decomposed structure of the present invention; Figure 3 It is a schematic diagram of a partially decomposed structure of the present invention; Figure 4 The utility model is a schematic diagram of the assembly structure of the present invention, a bicycle head pipe and a bicycle front fork. DETAILED DESCRIPTION

[0012] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0013] Figures 1 to 4 It is a structural schematic diagram of the present invention.

[0014] 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, annular bottom surface 52, PU gasket 6, positioning hole 6a, wear-resistant sheet 7, positioning boss 71, front fork 8, cylindrical assembly surface 81, annular support table surface 82, and head tube 9.

[0015] like Figure 1 and Figure 4As shown, the present invention 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 preventing safety hazards from being caused to riding.

[0016] like Figure 4 As shown, a shock-absorbing head bowl for an electric-assisted bicycle of the present invention includes a lower plug 5, a bearing bowl 4, a PU gasket 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 through the steel ball 2. The bearing bowl 4 is fixedly pressed into the lower tube opening of the head tube 9 through 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 by the lower plug 5 is supported and matched with the inner chamfer 11 formed by the inner ring 1 of the bearing bowl 4, so that the front fork 8 can rotate freely relative to the head tube 9 through the bearing bowl 4.

[0017] 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 fixedly mounted 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 pressure-bearing edge 31, and the bearing bowl 4 is pressed into the lower tube opening of the head tube 9. The port plane of the lower tube opening of the head tube 9 is matched with the top surface positioning of the pressure-bearing edge 31 of the outer ring 3, and the bottom surface of the pressure-bearing edge 31 is pressed on the top surface of the wear-resistant sheet 7. The PU gasket 6 is a gasket made of a material whose Chinese name is polyurethane, abbreviated as polyurethane. When the frame vibrates, the wear-resistant sheet 7 bears the pressure from the bearing bowl 4, and the PU gasket 6 can release elasticity by its physical properties to support the wear-resistant sheet 7. When the front fork 8 rotates relative to the head tube 9, the wear-resistant sheet 7 can form friction rotation with the bottom surface of the pressure-bearing edge 31. At this time, under the supporting force of the PU gasket 6, the wear-resistant sheet 7 will produce a damping effect with the pressure-bearing edge 31 of the bearing bowl 4. This damping effect can effectively prevent the frame vibration from being transmitted to the front fork, eliminate the shaking and deflection of the handlebar during riding, and ensure riding safety.

[0018] 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 ring bottom surface 52 formed on the lower plug 5 cooperates with the annular support table 82 of the front fork 8 for positioning and supporting; the inner hole wall 5b of the lower plug 5 is tightly fitted with the cylindrical assembly surface 81 of the front fork 8.

[0019] 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 matched 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.

[0020] 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. When installed, the positioning protrusion 71 of the wear-resistant sheet 7 is inserted into the positioning hole 6a of the PU gasket 6, so that the wear-resistant sheet 7 cannot rotate relative to the PU gasket 6. The number of the positioning hole 6a and the positioning protrusion 71 can be one each, or can be set according to the situation. In the present invention, it is preferred that six are formed on each.

[0021] In the embodiment Figure 1 As shown, The positioning hole 6a of the present invention is a tapered hole with a large diameter at the upper hole opening and a small diameter at the hole 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.

[0022] The shock-absorbing head bowl for an electric power-assisted bicycle of the present invention can effectively prevent the vibration of the frame from being transmitted to the handlebars through the front fork to cause safety hazards during riding, eliminate the shaking and swinging of the handlebars during riding, and ensure riding safety.

[0023] The best embodiment of the present invention has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of the present invention.

Claims

1. A shock-absorbing head bowl for an electric power-assisted bicycle, comprising a lower plug (5) and a bearing bowl (4) composed of an inner ring (1), a steel ball (2) and an outer ring (3); the bearing bowl (4) is fixedly pressed into the lower tube opening of the head tube (9), and the lower plug (5) is fixedly sleeved on the front fork (8); the characteristics are: The outer chamfer (51) formed on the lower plug (5) cooperates with the inner chamfer (11) formed on the inner ring (1) of the bearing bowl (4), and 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), and a wear-resistant plate (7) is provided on the annular top surface of the PU gasket (6) to prevent rotation; 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); the annular bottom surface (52) of the lower plug (5) cooperates with the annular support table (82) of the front fork (8) for positioning and supporting; the inner hole wall (5b) of the lower plug (5) is tightly fitted with the columnar 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), 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 coordination 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 bosses (71), and the positioning bosses (71) are matched with the positioning holes (6a) for positioning and plugging.

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 hole opening and a small diameter at the hole bottom, and the positioning protrusion (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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