TWM452908U - Shock absorptive bicycle frame - Google Patents

Description

Shock absorber bicycle frame

This creation department is related to bicycles, especially a shock-absorbing bicycle frame and its manufacturing method. The frame is not only light in weight but also good in shock-absorbing performance, and its preparation steps are simple, easy to apply and high in product yield.

Conventionally, bicycle frames made of carbon fiber reinforced materials are made of carbon fiber woven fabric impregnated with thermosetting resin such as epoxy resin. After being wound into a preform and then heat-hardened in a mold, a bicycle car can be formed. Because of its light weight and high structural strength, this material has been widely used in the bicycle industry.

However, the frame made of this material has a poor shock absorbing effect, and must be equipped with a spring or hydraulic shock absorber to provide shock absorbing function. However, the installation of the shock absorber will greatly increase the weight of the frame and reduce the power transmission. The side effect of efficiency, therefore, how to make a bicycle frame that is light and shock-absorbing has become an issue that needs to be developed in the industry.

One of the aims of the present invention is to provide a shock absorbing bicycle frame that is not only lightweight but also has a good shock absorbing effect.

In order to achieve the foregoing disclosure, the shock-absorbing bicycle frame provided by the present invention comprises a pipe body having an inner pipe and an outer pipe sleeve disposed on at least a portion of the inner pipe, and the inner pipe and the outer pipe There is no gap between the tubes, the inner tube is made of fiber-reinforced thermosetting plastic material, and the outer tube is made of fiber-reinforced thermoplastic material. In this way, the frame of the creation is not only light in weight but also good in shock absorption.

10‧‧‧ Shock absorber bicycle frame

11‧‧‧ head tube

12‧‧‧Upper tube

13‧‧‧Under the tube

14‧‧‧Riser

15‧‧‧Back fork

16‧‧‧ rear fork

17‧‧‧ Front fork

18‧‧‧Hands

19‧‧‧ seat tube

20'‧‧‧Preformed outer tube

20‧‧‧External management

22‧‧‧ outer edge

23‧‧‧ inner wall

201‧‧‧ gap

24'‧‧‧Preformed inner tube

24‧‧‧Inside

26‧‧‧ outer edge

28‧‧‧ tube body

30‧‧‧Mold

32‧‧‧ inner wall

The first drawing is a suspension bicycle frame according to a preferred embodiment of the present invention; the second to fifth drawings are schematic views of a manufacturing method of a preferred embodiment of the present invention; and the sixth drawing is a partial perspective view of a preferred embodiment of the present invention; Figure 7 is a partial perspective view of another preferred embodiment of the present invention.

Referring to the first figure, the shock absorbing bicycle frame 10 provided by the preferred embodiment has a head tube 11 , an upper tube 12 extending horizontally rearward from the head tube 11 , and a lower tube 13 from the head tube 11 . Extending backward and downward, a riser 14 connects the upper tube 12 and the lower end of the lower tube 13, a rear upper fork 15 extends rearward from the upper portion of the riser 14, and a rear lower fork 16 passes from the lower portion of the riser 14 Extending backward and connected to the rear end of the rear upper fork 15, a front fork 17 is rotatably inserted in the head pipe 11, a handle 18 is provided at the top end of the front fork 17, and a tube 19 is inserted in the front In the tube 14, since each part of the frame 10 is tubular, the above tube 12 will be described in detail below.

The method for manufacturing the shock absorbing bicycle frame (or the upper tube) provided by a preferred embodiment of the present invention comprises the following steps:

(a) As shown in the second figure, a fiber woven fabric impregnated with a thermoplastic resin is wound into a preformed outer tube 20', wherein the fiber may be used without being limited to carbon fiber, boron fiber, glass fiber or kewei ( KEVLAR ^® ) fiber, which is preferably carbon fiber, which can be used without being limited to nylon (Nylon), polyethylene (PE), polypropylene (PP), polystyrene (PS), ABS resin or polyvinyl chloride ( PVC), wherein nylon 6, nylon 11, nylon 12 or nylon 66 is preferred; then, as shown in the third figure, the preformed outer tube 20' is placed in a mold 30 and heated to 230 ° C to 250 ° C And pressing the outer edge of the pre-shaped outer tube 20' to the inner wall 32 of the mold 30, and after about 30 minutes, the pre-shaped outer tube 20' can be made. Hardening forms an outer tube 20. In this step, the heating temperature is preferably 240 ° C, and a gas higher than one atmosphere is poured into the pre-shaped outer tube 20' to press the inside of the pre-shaped outer tube 20'.

(b) as shown in the fourth figure, a fiber woven fabric impregnated with a thermosetting resin is wound into a preformed inner tube 24', and the preformed inner tube 24' is inserted into the outer tube 20 which has been hardened to strengthen the The bonding force of the preformed inner tube 24' and the outer tube 20 may be coated with an adhesive material on the outer edge of the pre-shaped inner tube 24' or the inner wall 23 of the outer tube 20, and the adhesive material may be epoxy resin or the like. Liquid or other solids, which can be more firmly bonded by means of an adhesive material, wherein the fiber can be used without limitation carbon fiber, boron fiber, glass fiber or KEVLAR ^® fiber, but carbon fiber is preferred. The thermosetting resin may be, but not limited to, an epoxy resin, an acrylic resin, a phenol resin or a polyurethane (PU), and an epoxy resin is preferred.

(c) Finally, as shown in the fifth figure, the preformed inner tube 24' together with the outer tube 20 is heated in the mold 30 to 140 ° C to 160 ° C, preferably at 150 ° C, and in the preform The inner tube 24' is internally pressurized so that the outer edge 26 of the pre-shaped inner tube 24' abuts against the inner wall 23 of the outer tube 20. After about 15-30 minutes, the pre-shaped inner tube 24' can be hardened. An inner tube 24 is simultaneously joined to the outer tube 20 in a seamless manner. In this step, a gas higher than one atmosphere is poured into the pre-shaped inner tube 24'. The preform inner tube 24' is internally pressurized, and the mold used in the step and the mold in the step (a) may be The same mold can also be different molds.

Thereby, a specific part of the bicycle frame can be made, such as the tube 12, and the specific part is combined with other parts to form a complete bicycle frame, as shown in the sixth figure. The shock absorbing bicycle frame 10 includes a tubular body 28 having an inner tube 24 and an outer tube 20 sleeved on the inner tube 24, and the inner tube 24 and the outer tube 20 have no gap therebetween. The inner tube 24 is made of fiber-reinforced thermosetting plastic, and the outer tube 20 is made of fiber-reinforced thermoplastic plastic, and the outer tube 20 is coated on at least a part of the inner tube 24, and not necessarily The inner tube 24 is completely covered.

Since the inner tube 24 is made of fiber-reinforced thermosetting plastic material, its rigidity is higher than that of the outer tube, but the elasticity (shock resistance) is lower than that of the outer tube, and the outer tube is made of fiber-reinforced thermoplastic material, and its rigidity is lower than that of the inner tube but elasticity (shock absorption). It is better than the inner tube. Therefore, after actual testing, the bicycle frame of this creation has the rigidity and the considerable degree of elasticity (or shock absorption) according to the demand for use, and can effectively absorb the vibration transmitted to the rider due to the road surface. It reduces the discomfort of the rider and the weight of the bicycle frame with the weight of the shock absorber is lighter, which makes the use of the bicycle more effective and has considerable market potential.

Based on the spirit of the present creation, the present invention can be applied to any part of the bicycle frame, such as the head tube 11, the upper tube 12, the lower tube 13, the riser 14, the rear upper fork 15, the rear lower fork 16, the front fork 17, The handle 18 and the seat tube 19, in particular the two-legged foot of the rear upper fork 15, the two-legged foot of the rear lower fork 16, or the two-legged foot of the front fork 17, the outer tube 20 is covered by the area of the inner tube 24 Adjusted according to requirements, it is not necessary to completely cover the inner tube 24, and even the outer tube 20 has a notch 201 and does not form a complete tube shape, as shown in the seventh figure, it should also be an application for creation. Covered by the scope of patents.

20‧‧‧External management

24‧‧‧Inside

28‧‧‧ tube body

Claims (5)

A shock absorbing bicycle frame includes: a tube body having an inner tube and an outer tube sleeve disposed on at least a portion of the inner tube, and the inner tube and the outer tube having no gap, the inner tube system Made of fiber-reinforced thermosetting plastic, the outer tube is made of fiber-reinforced thermoplastic. The shock absorbing bicycle frame according to claim 1, wherein the thermoplastic material of the outer tube is formed of nylon, polyethylene, polypropylene, polystyrene, ABS resin or polyvinyl chloride. The shock absorbing bicycle frame of claim 2, wherein the nylon nylon 6, nylon 11, nylon 12 or nylon 66. The shock absorbing bicycle frame according to claim 1, wherein the thermosetting plastic of the inner tube is formed of epoxy resin, acrylic resin, phenol resin or polyurethane (PU). The shock absorbing bicycle frame of claim 1, wherein the outer tube has a notch and does not form a complete tubular shape.