CN2787558Y - Composite Bicycle Front Fork Riser - Google Patents

Abstract

The utility model is a composite material bicycle front fork stem, which mainly comprises a metal inner tube with a uniform tube diameter, and a covering body composed of a composite material is covered on the inner and outer peripheries of the metal inner tube. The front fork stem is formed into a tube body with different tube diameter areas through the covering body, thereby forming a light-weight and high-strength bicycle front fork stem.

Description

Composite Bicycle Front Fork Riser

technical field

The utility model mainly relates to a bicycle front fork standpipe made of composite materials, in particular to a bicycle front fork standpipe with light weight and good strength.

Background technique

General existing bicycle, as shown in Figure 3, mainly comprises a vehicle frame 40, a front fork pipe 42, a rear fork pipe 43, a front wheel 44, a rear wheel 46, a pad 47 and a handle 48, the The front fork tube 42 is rotatably combined on the vehicle frame 40 through a front fork stand tube 422, and the front and rear wheels 44, 46 are respectively rotatably arranged on the front and rear fork tubes 42, 43, and the seat cushion 47 is arranged on the on the vehicle frame 40, and the handle 48 is fixedly connected to the front fork standpipe 422, so that when the user turns the handle 48, the front fork standpipe 422 and the front fork pipe 42 can drive the deflection angle of the front wheel 44 to change the bicycle. direction of travel.

The vehicle frame 40 and each pipe body 42, 422, 43 of the existing bicycle are mostly made of aluminum, but the aluminum still has a very heavy weight. For some bicycles with special needs, such as bicycles for racing, etc. , the overall weight of the aluminum bicycle is heavy, which does not meet the needs of racing; in addition, because the front fork riser 422 is connected to different components such as the front fork pipe 42 and the handle 48 at the same time, so the existing front fork riser 422 is not for A pipe body with a single pipe diameter is a pipe body structure with different pipe diameters. In this way, if the front fork riser 42 with different pipe diameter areas is formed by aluminum extrusion, the overall processing will be increased. The complexity of the program will also increase the processing cost.

Therefore, some people use composite materials such as carbon fiber to form various tubes of bicycles, such as handle risers, etc. However, although carbon fiber is light in weight, it can meet the needs of special-purpose bicycles such as racing, but the material cost of carbon fiber is high. It is not economical to manufacture bicycles. At the same time, the impact resistance of carbon fiber is insufficient, and it is easy to break due to external force when the bicycle is traveling, which is easy to cause danger, and even endanger the life safety of the bicycle rider.

Therefore, the utility model is in view of the deficiencies and defects in the structure of the existing bicycle front fork standpipe, and through continuous testing and improvement, finally develops a kind of utility model that can improve the existing defects.

Contents of the invention

The main purpose of the utility model is to provide a composite material front fork riser with light weight and good strength.

In order to achieve the above purpose, the utility model mainly provides a bicycle front fork standpipe made of composite material, which mainly includes a metal inner tube with a uniform diameter, and a metal tube made of composite material is coated on the inner and outer peripheral edges of the metal inner tube. The cladding body, and through the cladding body, the formed front fork standpipe forms a tube body with different pipe diameter areas.

Through the above technical means, the utility model can improve the structural strength of the front fork standpipe through the metal inner tube to improve the safety of bicycle riding, and can appropriately reduce the weight of the front fork standpipe to meet the requirements of racing bicycles. and other usage requirements.

Description of drawings

Fig. 1 is a sectional view of the utility model.

Fig. 2 is a cross-sectional view of the utility model when it is molded with a core tube.

Fig. 3 is a perspective view of a conventional bicycle.

Explanation of symbols in the figure:

10 Front fork stem 12 Metal inner tube

14 cladding body 20 heart tube

40 frame 42 front fork tube

422 front fork riser 43 rear fork tube

44 front wheels 46 rear wheels

47 seat cushion 48 handle

Detailed ways

The utility model mainly provides a bicycle front fork standpipe made of composite material, please refer to Fig. 1, it can be seen from the figure that the front fork standpipe 10 of the present utility model mainly includes a metal inner tube 12 with a uniform diameter The metal inner tube 12 can be made of materials such as aluminum alloy, scandium alloy and titanium alloy, and the inner and outer peripheries of the metal inner tube 12 are coated with a carbon fiber, glass fiber, Kevlar fiber, basalt fiber and any other fiber. The covering body 14 composed of composite materials such as epoxy resin system, PU resin system, PE resin system, acrylic resin system and alkyd resin system...etc. The front fork stem tube 10 is formed as a tube body with regions of different tube diameters.

When forming, please refer to Fig. 2 again, the composite material can be wrapped or wound on the core tube 20 with a specific shape, so that the inner edge surface of the coating body 14 made of composite material can match the core tube 20 shape, and form different sizes of inner diameter areas, and then set the metal inner tube 12 with uniform diameter on the composite material, and finally wrap the metal inner tube 12 with the composite material to form a complete cladding body 14 , and make the covering body 14 form regions with different sizes of outer diameters according to different parts. After the composite material is hardened by proper heating and pressure, the core tube 20 is pulled out to complete the forming operation of the front fork stem 10 .

The front fork standpipe 10 made of this composite material has a metal inner tube 12 in the cladding body 14, so the front fork standpipe 10 can have better structural strength, impact resistance, and tensile properties. and compression resistance, it can prevent the front fork standpipe 10 from being broken due to external force during the running of the bicycle, prevent the bicycle rider from being injured, and improve the safety of the bicycle when riding; secondly, the utility model The front fork standpipe 10 is composed of a metal inner tube 12 with a uniform pipe diameter coated with a composite material, so the overall weight of the front fork standpipe 10 can be appropriately reduced to meet the use requirements of special-purpose bicycles such as racing bicycles, and The front fork standpipe 10 forms parts of different pipe diameters of the front fork standpipe 10 through the covering body 14, so it is not necessary to form the metal inner tube 12 with complicated techniques and processing procedures, and the overall processing cost can be reduced.

Claims (1)

1. the bicycle front fork standpipe of a composite material, it is characterized in that, include a metal inner pipe that is the homogeneous caliber, interior outer peripheral edges in metal inner pipe are coated with one by the cladding that composite material constituted, and make the vertical tube of front fork that is constituted form the body with different caliber zones and see through cladding.

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