TW201813868A - Suspension device of bicycle front fork enabling the user to adjust the suspension pressure of the front fork according to the buffer pressure of the spring device - Google Patents

Abstract

The suspension device of the bicycle front fork is arranged in a head tube of a bicycle handle. The suspension device is provided with a cylinder barrel. The bottom end system is fixedly connected with the base of the front fork of the bicycle, and the top end penetrates into the interior of the head tube. The top end is fixedly connected with the inner wall of the head tube, and a piston rod is arranged at the bottom end of the cylinder barrel and inserted into the cylinder barrel. The piston rod is connected with a spring device, and the spring device has the force of pushing the piston rod to leave the cylinder barrel. The invention is characterized in that an air chamber is arranged in a cylinder barrel below the piston. The air chamber is communicated with an intake valve of the base. By adjusting the air pressure in the air chamber, the buffer pressure of the spring device can be adjusted, enabling the user to adjust the suspension pressure of the front fork accordingly.

Description

Suspension device for bicycle front fork

The invention relates to a suspension device for a bicycle front fork, and more particularly to a device capable of adjusting the suspension pressure of a bicycle front fork.

Press, it is known that the bicycle front fork suspension device is arranged in the head tube of a bicycle handlebar. The suspension device is provided with a cylinder tube, the bottom end is fixedly connected with a base of the bicycle fork, and the top end is penetrated. The head tube is inside. A piston rod is provided, the top end of which is fixedly connected to the inner wall of the head tube, a piston is arranged at the bottom end and extends into the cylinder barrel. With a spring device, the top end is fixedly connected to the top end of the piston rod, and the bottom end is connected to the cylinder barrel, and has the force to push the head tube and the piston rod upward. The magnitude of the buffer pressure of the conventional bicycle front fork suspension device depends entirely on the selection of the spring coefficient of the spring device. Which kind of elastic coefficient buffer device the manufacturer matches, the suspension fork's suspension buffer pressure is fixed, and the user It cannot be adjusted unless another spring device is replaced. The preload of this kind of buffer device is set at the time of assembly, and cannot meet the different shock-absorbing effects required by each person. In view of this, the present inventors conducted in-depth research and development improvements to produce the present invention.

That is, the object of the present invention is to provide a suspension device for a bicycle front fork that can adjust the shock and preload of the internal shock of the bicycle front fork. In order to achieve the above object, the main feature of the present invention is that an air chamber is provided in the cylinder tube located below the piston, and the air chamber is in communication with an intake valve on the base, and the air pressure in the air chamber is adjusted by The size can further adjust the cushioning pressure of the spring device, so that the user can adjust the suspension pressure of the front fork.

In order to achieve the above-mentioned object, the technical means adopted by the present invention and the achievable effects are described in detail with reference to the following preferred embodiments in conjunction with the accompanying drawings, so that they can be fully understood. Please refer to the first to fifth figures. The suspension device 1 of the present invention has a cylinder 10, the bottom end of which is fixedly connected to a base 30 above the front fork 3 of the bicycle, and the top end penetrates into the inside of a head tube 2. . A piston rod 11 is provided, and a coupling seat 111 at the top end is fixedly connected with the inner wall of the head tube 2 so that the piston rod 11 is integrated with the head tube 2; a piston 110 is arranged at the bottom end of the piston rod 11 and extends. Into the cylinder 10. With a spring device 12, the top end is fixedly connected to the top end of the piston rod 11, the bottom end is connected to the cylinder 10, and has the force to push the head tube 2 and the piston rod 11 upward; and a buffer seat 13, The tie is elastic and penetrates the piston rod 11, and is located between the piston 110 and a limiting wall 100 protruding inward from the inner wall of the cylinder tube 10. An air chamber 14 is disposed in the cylinder tube 10 below the piston 110, and the air chamber 14 communicates with an intake valve 31 located on the base 30, thereby adjusting the air pressure in the air chamber 14. Please refer to the second, third, and fifth figures. The base 30 has an intake pipe 32 inside, and the intake pipe 32 extends from the intake end of the intake valve 31 into the air chamber 14. Please refer to the fourth to sixth figures. The above-mentioned shock absorbing device 1 has a sleeve 11A inside. The sleeve 11A is sleeved between the outer wall above the cylinder tube 10 and the head pipe 2 and has a restriction head pipe 2 only. Can be axially displaced. The sleeve surface of the sleeve 11A has a plurality of slots 11B arranged at intervals and the long ends of the holes are arranged axially. Each slot 11B is individually embedded with a ball 11C. An outer wall of the cylinder tube 10 is provided with a plurality of chute grooves 101 arranged at intervals and arranged in the axial direction. The balls 11C of the sleeve 11A are embedded in the corresponding chute grooves 101. Please refer to the fourth to sixth figures. The above-mentioned spring device 12 is mainly composed of a first spring 120 and a second spring 121. The first spring 120 is longer than the second spring 121. The first spring 120 is disposed in the second spring 121. The top ends of the first and second springs 120 and 121 are fixedly connected to the coupling seat 111. The bottom ends of the first and second springs 120 and 121 are respectively connected to a fixed position of the cylinder barrel 10 and have a force to push the head tube 2 and the piston rod 11 upward. Please refer to the fourth to sixth figures. The above-mentioned shock absorbing device 1 has a connecting base 15. The connecting base 15 is sleeved in the piston rod 11 and is arranged above the limiting wall 100. The top of the connecting base 15 The bottom end of the first spring 120 is used for contact. Please refer to the fourth to sixth figures. The above-mentioned shock absorbing device 1 has a positioning seat 16 which is sleeved in the piston rod 11 and is located below the limiting wall 100. The restriction cannot move further above the limiting wall 100. The bottom end of the positioning base 16 is in contact with the top end of the buffer base 13. In application, if the gas chamber 14 is not filled with gas, the elastic stretch length of the spring device 12 (the first spring 120 and the second spring 121) is L (as shown in the sixth figure). When the gas is filled into the air chamber 14 by the intake valve 31, the gas pressure in the air chamber 14 will push the piston 110 to compress the buffer seat 13 and slide upward, so that the piston rod 11 and the head pipe 2 With the upward displacement, the spring device 12 (the first spring 120 and the second spring 121) has an elastic stretch length L1 (as shown in the seventh figure), which is longer than the elastic stretch length L of the sixth figure. This adjusts the suspension pressure of the spring device 12. As shown in the eighth figure, if more gas is filled into the gas chamber 14, the gas pressure in the gas chamber 14 increases, and the piston 110 is pushed and pushed to strongly squeeze the buffer seat 13, causing the buffer seat 13 to deform. , The piston rod 11 and the head tube 2 are further displaced upwards, because the first spring 120 and the second spring 121 are more stretched, and the elastic stretch length L2 is longer, so that the suspension of the suspension 1 The action stroke can be variable. Therefore, by filling the gas into the air chamber, the rider can adjust the preload of the shock absorbing device 1 by himself, and the buffer pressure can be adjusted according to individual needs. In summary, the present invention can indeed achieve the intended function and purpose, and the detailed description can enable those skilled in the art to implement it, but the above examples are only used to illustrate the present invention, and all equivalent structures The changes still do not depart from the scope of rights of the present invention.

1‧‧‧ Suspension

10‧‧‧ cylinder

100‧‧‧ limit wall

101‧‧‧chute

11‧‧‧Piston rod

110‧‧‧Piston

111‧‧‧Combination Block

11A‧‧‧Sleeve

11B‧‧‧Slotted

11C‧‧‧Ball

12‧‧‧ spring device

120‧‧‧first spring

121‧‧‧Second spring

13‧‧‧ buffer seat

14‧‧‧air chamber

15‧‧‧Connector

16‧‧‧ Positioning Block

2‧‧‧ head tube

3‧‧‧ Fork

30‧‧‧ base

31‧‧‧Air inlet valve

32‧‧‧Air inlet pipe

L, L1, L2 ‧‧‧ Elastic Stretch Length

The first figure is an external view of an embodiment of the present invention arranged in a fork tube. The second figure shows a front sectional view of an embodiment of the present invention arranged in a fork tube. The third figure shows a side cross-sectional view of an embodiment of the present invention disposed in a fork tube. The fourth figure is a partial enlarged view of the second figure. The fifth figure shows a partially exploded view of an embodiment of the present invention. The sixth diagram is a partially enlarged view of the third diagram. The seventh diagram is a schematic diagram of filling gas into a gas chamber according to an embodiment of the present invention. The eighth figure is a schematic diagram of filling more gas into the gas chamber according to the embodiment of the present invention.

Claims (6)

A shock absorber for a bicycle front fork is provided with a cylinder tube, the bottom end of which is fixedly connected to a base of the bicycle fork, and the top end is penetrated into the inside of a tube of the bicycle; The inner wall of the head pipe is fixed at a position, a piston is arranged at the bottom end and extends into the cylinder barrel; a spring device is arranged between the piston rod and the cylinder barrel, and has a pushing mechanism for the head tube and the piston rod Upward force; and a buffer seat, which is sleeved outside the piston rod and is located between the piston and a limiting wall inside the cylinder barrel; and an air chamber, which is the cylinder below the piston Inside the cylinder, the air chamber is in communication with an intake valve located on the base. The suspension device for a bicycle front fork according to item 1 of the scope of patent application, wherein the base has an intake pipe inside, and the intake pipe extends from an intake end of the intake valve into the air chamber. . The suspension device for a bicycle front fork according to item 1 or 2 of the scope of patent application, further comprising a sleeve, which is sleeved between the outer wall above the cylinder barrel and the head tube, and the outer wall of the sleeve There are a plurality of slots arranged at intervals and the long ends of the slot holes are arranged axially, each slot is individually embedded with a ball; the outer wall above the cylinder barrel has a plurality of slots arranged at intervals and arranged axially, and The ball of the sleeve is embedded in the corresponding chute. The suspension device for a bicycle front fork according to item 3 of the scope of patent application, wherein the spring device is mainly composed of a first spring and a second spring. The first spring is longer than the second spring. A first spring is disposed in the second spring, the top ends of the first and second springs are fixedly connected to the top end of the piston rod, and the bottom ends of the first and second springs are in contact with the cylinder tube. According to the shock absorber of the bicycle front fork described in item 4 of the scope of patent application, there is even a connecting seat, which is sleeved outside the piston rod and is located above the limiting wall. A spring is fixedly connected. For example, the shock absorbing device of a bicycle front fork described in item 4 of the scope of patent application, further has a positioning seat, the positioning seat is sleeved outside the piston rod and is located below the limiting wall, and the bottom end of the positioning seat is connected with The top of the buffer seat is attached.