TWI895005B - Shock absorbing device for a front fork of a bicycle - Google Patents

Abstract

The present invention relates to a shock absorbing device for the use of a bicycle front fork. The shock absorbing device comprising a connecting member and a damping member. The connecting member is for the use of connecting a bicycle front fork and the damping member. The shock absorbing member is connected to a bicycle stem and is disposed on the connecting member, thus to keep the bicycle stem from being in contact with the connecting member directly. Accordingly, an improved shock absorbing effect is provided.

Description

Shock absorbing device for bicycle front fork tube

The present invention relates to a shock absorbing device for a bicycle, and more particularly to a shock absorbing and isolating device for a front fork tube of a bicycle.

The top end of a conventional bicycle front fork tube rotatably passes through the bicycle head tube and is connected to a handlebar vertical tube (spool). The vertical tube is connected to a bicycle handlebar, and the bottom end of the front fork tube is rotatably provided with the bicycle front wheel. When the rider turns the handlebar, the direction of the front wheel can be changed, allowing the cyclist to control the direction of travel of the bicycle.

However, the front fork tube and handlebar tube of conventional bicycles are simply connected by a C-shaped opening at one end of the tube and secured by two bolts. There is no shock-absorbing or isolating structure between the two. Therefore, when the bicycle is riding on rough roads, the impact force between the front wheel and the road surface is directly transmitted from the front fork tube to the handlebar tube and the handlebars, making the rider more likely to feel uncomfortable while riding the bicycle. In worse cases, it will affect the rider's control of the bicycle, and if the rider is not careful, it is more likely to cause accidents such as falling off the bicycle. Further improvement is indeed necessary.

In view of the shortcomings of the existing bicycle front fork tube structure and use, the inventor has continuously researched and improved, and finally developed the present invention to improve the existing shortcomings.

The present invention primarily provides a shock-absorbing device for a bicycle front fork. The device utilizes a damping unit disposed between the front fork and the handlebar tube to provide both shock absorption and isolation. This prevents vibrations generated by the bicycle's front wheel from being directly transmitted from the front fork to the handlebar tube and handlebars, thereby enhancing riding comfort and safety.

To achieve the above-mentioned objectives, the present invention provides a shock absorbing device for a front fork tube of a bicycle, which includes a damping unit and a connecting unit. The damping unit includes a main body extending along an axial direction and can be connected to a handlebar vertical tube of a bicycle through the main body. The connecting unit is provided with a front fork tube connecting portion and a damping unit connecting portion. The front fork tube connecting portion is used to be connected to a front fork tube of the bicycle, and the damping unit connecting portion is used to be connected to the damping unit.

In the shock absorbing device, the front fork tube joint portion covers the front fork tube, and the front fork tube joint portion is provided with a locking portion for a locking member to be engaged to fix the front fork tube joint portion to the front fork tube.

In the shock absorbing device, the inner diameter of the front fork tube joint is larger than the inner diameter of the damping unit joint, and the outer surface of the main body is provided with a flange extending radially outward, and the flange at least partially covers the front fork tube joint.

The shock absorbing device is characterized in that a first through-hole is provided on the damping unit coupling portion, and a second through-hole is provided on the main body corresponding to the first through-hole. After the main body is coupled to the damping unit coupling portion, a pin is passed through the first through-hole and the second through-hole to couple the damping unit and the connecting unit.

The shock absorbing device is provided with a screw hole on the latch and a cover is provided on the top of the connecting unit. The cover is screwed into the screw hole by a bolt to fix the cover to one end of the damping unit joint.

In the shock absorbing device, the latch includes a fixing bolt and a coupling piece, one end of the fixing bolt is coupled to the coupling piece, and the coupling piece abuts against the outside of the body.

The shock absorbing device, wherein the latch includes a fixing bolt and a coupling member, the fixing bolt is coupled to the coupling member, the fixing bolt has a first tool end, the coupling member has a second tool end, and the first tool end and the second tool end are arranged on the handle vertical tube.

In the shock absorbing device, the damping unit and the connecting unit are made of different materials.

In the shock absorbing device, the material of one of the damping unit or the connecting unit is non-metallic.

In the shock absorbing device, the damping unit and the connecting unit have different elastic coefficients, and the elastic coefficient of the damping unit is greater than the elastic coefficient of the connecting unit.

By utilizing the technical means of the present invention, a damping unit is used to provide shock absorption and isolation between the front fork tube and the handlebar tube. This prevents vibrations generated by the bicycle's front wheel and the road from being directly transmitted to the handlebar tube and handlebars, thereby achieving the effect of improving the comfort and safety of the bicycle when riding.

To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the necessary figures used in describing each embodiment. Obviously, the figures described below are merely examples or embodiments of the present invention. Those skilled in the art will be able to apply the present invention to other similar scenarios based on these figures without further effort. Unless otherwise apparent from the context or indicated otherwise, the same reference numerals in the figures represent the same structure or operation.

Please refer to Figures 1 to 5. A bicycle having a shock absorbing device for a bicycle front fork mainly includes a steering device, which generally includes a head tube 20, a front fork tube 10, and a handlebar vertical tube 30. The front fork tube 10 used to set the present invention is connected to a front fork portion 14. The front fork tube 10 is rotatably passed through the head tube 20, and a head headset is usually provided between the front fork tube 10 and the head tube 20 to ensure smooth relative rotation between the front fork tube 10 and the head tube 20. The front fork portion 14 is rotatably coupled to the front wheel of the bicycle. In the first embodiment of the present invention, a connecting unit 12 is sleeved on the portion of the front fork tube 10 that extends beyond the head tube 20. An expander S is embedded in the top of the front fork tube 10. An expansion bolt S1 is inserted through the center of the connecting unit 12 and is screwed onto the expander S via the expansion bolt S1, securing the connecting unit 12 to the top of the front fork tube. The connecting unit 12 is then connected to a damping unit 16 to form the aforementioned shock absorbing device.

Please refer to Figures 2 to 5 for the detailed structure of the shock absorbing device. The damping unit 16 of this embodiment mainly includes a body 162 and a pin 166. The body 162 extends along an axial direction A and radially protrudes from the bottom end of the body 162 to form an annular flange 164. The connecting unit 12 is a tubular body and is provided with a front fork tube joint 123 and a damping unit joint 125 connected along the axial direction A. In this embodiment, the outer diameter of the front fork tube joint 123 is larger than the outer diameter of the damping unit joint 125, and the inner diameter of the front fork tube joint 123 is larger than the inner diameter of the damping unit joint 125, and the front fork tube joint 123 is used to fit on the front fork tube 10. A locking portion 121 is formed on one side of the front fork tube coupling 123. The locking portion 121 includes a cutout groove 1211 and at least one locking hole 1212. In the preferred embodiment, the at least one locking hole 1212 comprises two locking holes, each extending through both sides of the cutout groove 1211. Each locking hole 1212 has a threaded portion on one side of the cutout groove 1211. A locking member 124 is coupled to each locking hole 1212 to fit the front fork tube coupling 123 onto and securely clamp it to the front fork tube 10.

When the body 162 of the damping unit 16 is sleeved on the connecting unit 12, the body 162 of the damping unit 16 covers the damping unit joint portion 125 of the connecting unit 12, and the flange 164 at least partially covers the front fork tube joint portion 123. The flange 164 abuts against the front fork tube joint portion 123. In addition, a first through-hole 122 and a second through-hole 1622 are respectively provided on the damping unit joint portion 125 and the body 162 of the damping unit 16, which are opposite to each other in a straight line, that is, opposite to each other along the direction of the straight line, so that the latch 166 can be sequentially inserted into the second through-hole 1622 of the damping unit 16. and the first through-hole 122 of the damping unit coupling portion 125, so that the damping unit 16 can be stably positioned at a predetermined position of the connecting unit 12. In this way, when the handlebar vertical tube 30 of this embodiment is connected to the front fork tube 10 through the shock absorbing device formed by the connecting unit 12 and the damping unit 16, the C-shaped opening at one end of the handlebar vertical tube 30 will fit over and tightly clamp the body 162 of the damping unit 16, and then be connected to the connecting unit 12 through the damping unit 16, and finally to the front fork tube 10 through the connecting unit 12. Therefore, the handlebar vertical tube 30 will not directly contact the front fork tube 10.

Secondly, after the front fork tube 10 is combined with the shock absorbing device and the handlebar vertical tube 30, a top cover 18 is provided at the top of the connecting unit 12 to close the top opening of the connecting unit 12. The top cover 18 is annular and has a bolt 182 disposed in the center. A screw hole 1662 for the bolt 182 to be threaded is provided on the latch 166 of the damping unit 16. By screwing the bolt 182 into the screw hole 1662, the top cover 18 is fixed to one end of the main body 162, and the latch 166 is prevented from rotating or detaching from the first through-hole 122 of the connecting unit 12 and the second through-hole 1622 of the damping unit 16.

Because the connection unit 12 coupled to the front fork tube 10 of the present invention is connected to the damping unit 16, and the damping unit 16 and/or the connection unit 12 provide a damping effect that attenuates vibrations when transmitted, the damping unit 16 and the connection unit 12 may have different elastic coefficients, and this difference in elastic coefficient is due to the different materials of the damping unit 16 and the connection unit 12. In this embodiment, the damping unit 16 is made of a non-metallic material such as plastic, rubber, or a composite material, while the connection unit 12 is made of metal. In other preferred embodiments, the damping unit 16 may be made of metal, while the connection unit 12 may be made of a non-metallic material such as plastic, rubber, or a composite material. Therefore, when the bicycle is ridden on uneven roads, the vibration generated between the front wheel and the road surface can be directly transmitted to the handlebar vertical tube 30 and the handlebars due to the shock absorption and isolation effects provided by the damping unit 16 and/or the connecting unit 12. This can maintain the rider's riding comfort while preventing the handlebars from shaking due to vibrations, thereby improving the rider's controllability and safety of the bicycle.

Please refer to Figures 6 to 9. In the second embodiment of the present invention, a bicycle having a shock absorbing device for a bicycle front fork tube also includes a head tube 20A, a front fork tube 10A, and a handlebar vertical tube 30A. The front fork tube 10A rotatably penetrates the head tube 20A, and a connecting unit 12A is mounted on the portion of the front fork tube 10A extending out of the head tube 20A. The connecting unit 12A is further connected to a damping unit 16A to form the above-mentioned shock absorbing device.

The connecting unit 12A is a tubular body and is provided with a front fork tube joint portion 123A and a damping unit joint portion 125A connected along an axis A. The outer diameter of the front fork tube joint portion 123A is larger than the outer diameter of the damping unit joint portion 125A, and the front fork tube joint portion 123A is tightly fixed to the top of the front fork tube 10A. The damping unit 16A includes a body 162A, a bottom ring 163A, and a top ring 165A. The body 162A, the bottom ring 163A, and the top ring 165A are all mounted on the connecting unit 12A for coupling to the front fork tube 10. Specifically, the body 162A, the bottom ring 163A, and the top ring 165A are mounted from bottom to top on the damping unit coupling portion 125A of the connecting unit 12A, and the bottom ring 163A abuts against the top end of the front fork tube coupling portion 123A of the connecting unit 12A, while the top ring 165A is coupled to the connecting unit 12A. The damping unit 16A is abutted against an upper cover 18A at the top of the connecting unit 12A. When the C-shaped opening of the handlebar vertical tube 30A is sleeved on the front fork tube 10, the handlebar vertical tube 30A is fitted and tightly clamped to the main body 162A of the damping unit 16A for fixation. The bottom ring 163A and the top ring 165A are respectively located at the bottom and top ends of the C-shaped opening of the handlebar vertical tube 30A. In this way, the provision of the damping unit 16A can also prevent the vibration generated by the front wheel from being directly transmitted to the handlebar vertical tube 30A and the handlebars, thereby improving the comfort and safety of the bicycle when riding.

Please refer to Figures 10 to 13. In the third embodiment of the present invention, a bicycle having a shock absorbing device for a bicycle front fork tube also includes a head tube 20B, a front fork tube 10B and a handlebar vertical tube 30B. The front fork tube 10B rotatably penetrates the head tube 20B, and a connecting unit 12B is provided on the portion of the front fork tube 10B extending out of the head tube 20B. The connecting unit 12B is then connected to a damping unit 16B to form the above-mentioned shock absorbing device. The handlebar vertical tube 30B is a tubular body extending in the front-to-rear direction, and a sleeve portion 32B is provided at one end of the rear side of the handlebar vertical tube 30B. The sleeve portion 32B is fitted onto the damping unit 16B of the shock absorbing device, and a positioning hole 321B is passed through the rear side of the sleeve portion 32B.

The connecting unit 12B is tubular and includes a fork tube coupling portion 123B and a damping unit coupling portion 125B connected along an axis A. In this embodiment, the outer diameter of the fork tube coupling portion 123B is larger than the outer diameter of the damping unit coupling portion 125B, and the fork tube coupling portion 123B fits over and securely clamps the top of the fork tube 10B. The damping unit 16B mainly includes a body 162B, a fixing bolt 167B, a coupling member 168B and a top ring 165B. A ring-shaped flange 164B is radially extended from the bottom end of the body 162B. When the damping unit 16B is mounted on the connecting unit 12B coupled to the top of the front fork tube 10B, the body 162B of the damping unit 16B covers the damping member 12B. The outer side of the damping unit joint portion 125B, and the flange 164B abuts against the top end of the front fork tube connection portion 123B, and the first through-hole 122B and the second through-hole 1622B are respectively provided on the damping unit connection portion 125B of the connection unit 12B and the body 162B of the damping unit 16B, and the positioning hole 321B of the handlebar vertical tube 30B is opposite to the second through-hole 1622B, After the fixing bolt 167B passes through the positioning hole 321B of the handle vertical tube 30B, it passes through the second through hole 1622B of the damping unit 16B and the first through hole 122B of the connecting unit 12B in sequence. One end of the fixing bolt 167B is combined with the above-mentioned coupling member 168B and has the same function as the latch in the first preferred embodiment. At this time, the coupling member 168B is located at the handle vertical tube. The damping unit 16B is stably fixed on the connecting unit 12B, and the sleeve portion 32B at one end of the handle vertical tube 30B is fitted around the body 162B of the damping unit 16B, so that the handle vertical tube 30B cannot rotate relative to the connecting unit 12B or the damping unit 16B with the axis A as the rotation center.

In this embodiment, the positioning hole 321B is a countersunk hole, the fixing bolt 167B is a bolt with a head, and the coupling 168B can be a nut or a column with a screw hole, etc., so that when the head of the fixing bolt 167B is embedded in the positioning hole 321B, the coupling 168B can be screwed into one end of the fixing bolt 167B, and the top ring 165B is provided on the connecting unit 12B and abuts against the top edge of the main body 162B of the damping unit 16B, and abuts against an upper cover 18B coupled to the top end of the connecting unit 12B. When one end of the handlebar tube 30B is sleeved onto the connecting unit 12B of the front fork tube 10B, the sleeve portion 32B at one end of the handlebar tube 30B will fit over and be tightly clamped against the damping unit 16B of the shock absorbing device, without directly contacting the front fork tube 10B. This prevents vibration generated by the front wheel from being directly transmitted to the handlebar tube 30B and the handlebar, thereby improving the comfort and safety of the bicycle.

Please refer to Figures 14 to 18. In the fourth embodiment of the present invention, a bicycle having a shock absorbing device for a bicycle front fork tube also includes a head tube 20C, a front fork tube 10C and a handlebar vertical tube 30C. The front fork tube 10C rotatably penetrates the head tube 20C, and a connecting unit 12C is provided on the portion of the front fork tube 10C extending out of the head tube 20C. The connecting unit 12C is then connected to a damping unit 16C to form the above-mentioned shock absorbing device. The handlebar vertical tube 30C is a tubular body extending in the front-to-rear direction and has a sleeve portion 32C at one end on the rear side of the handlebar vertical tube 30C. The sleeve portion 32C is fitted onto the damping unit 16C of the shock absorbing device, and a positioning hole 321C is penetrated in the sleeve portion 32C along the left-right direction.

The connecting unit 12C is a tubular body and is provided with a front fork tube joint portion 123C and a damping unit joint portion 125C connected along an axis A. In this embodiment, the outer diameter of the front fork tube joint portion 123C is larger than the outer diameter of the damping unit joint portion 125C, and the front fork tube joint portion 123C is used to fit and tightly clamp the top of the front fork tube 10C for fixation. The damping unit 16C mainly includes a body 162C, a latch 166C and a top ring 165C. A ring-shaped flange 164C is radially extended from the bottom end of the body 162C. When the damping unit 16C is sleeved on the connecting unit 12C, the body 162C of the damping unit 16C is covered on the outer side of the damping unit connecting portion 125C of the connecting unit 12C, and the flange 164C is against the top end of the front fork tube connecting portion 123C of the connecting unit 12C. A first through hole 122C and a second through hole 164C are respectively provided on the damping unit connecting portion 125C of the connecting unit 12C and the body 162C of the damping unit 16C. The positioning hole 321C of the handle vertical tube 30C is also in a straight line with the second through hole 1622C and the first through hole 122C, so that the above-mentioned pin 166C can pass through the positioning hole 321C of the handle vertical tube 30C, the second through hole 1622C of the damping unit 16C and the first through hole 122C of the connecting unit 12C in sequence, so that the damping unit 16C can be stably fixed on the connecting unit 12C, and the sleeve portion 32C at one end of the handle vertical tube 30C can be fitted on the main body 162C of the damping unit 16C and fixed, so that the handle vertical tube 30C cannot rotate relative to the connecting unit 12C or the damping unit 16C with the axis A as the rotation center.

In this embodiment, one side of the positioning hole 321C is a countersunk hole, and the other side is a screw hole. The latch 166C is a bolt that passes through one side of the positioning hole 321C, the second through-hole 1622C, and the first through-hole 122C in sequence, and then is screwed to the other side of the positioning hole 321C. This secures the latch 166C to the handlebar tube 30C and passes through the second through-hole 1622C and the first through-hole 122C. Furthermore, the top ring 165C is fitted over the connecting unit 12C and rests against the top edge of the damping unit 16C body 162C. It also rests against a top cover 18C attached to the top of the connecting unit 12C. When the handlebar tube 30C is mounted on the shock absorbing device, the sleeve portion 32C at one end of the handlebar tube 30C will fit over and tightly clamp the damping unit 16C without directly contacting the connecting unit 12C mounted on the front fork tube 10C. This can reduce the direct transmission of vibration and improve the comfort and safety of the bicycle when riding.

Secondly, the damping units 16, 16B, 16C in the above-mentioned preferred embodiments may also be springs, elastic bodies, or other objects with a shock-absorbing effect. Any object that can prevent the front fork tubes 10, 10A, 10B, 10C from directly contacting the handlebar vertical tubes 30, 30A, 30B, 30C and can isolate the vibration generated by the front wheel from being transmitted from the front fork tubes 10, 10A, 10B, 10C to the handlebar vertical tubes 30, 30A, 30B, 30C falls within the scope of the damping units 16, 16B, 16C of the present invention.

Furthermore, in addition to the first to fourth embodiments described above, the present invention provides a connecting unit comprising an integrally connected front fork tube connecting portion and a damping unit connecting portion. In addition, the front fork tube connecting portion and the damping unit connecting portion of the connecting unit can also be connected by means of screw connection, riveting, or the like. Please refer to the fifth embodiment shown in Figures 19 to 23, in which the shock absorbing device also includes a connecting unit 12D, which is connected to a damping unit 16D to form a shock absorbing device. A handle vertical tube 30D is provided in conjunction with the shock absorbing device. The handle vertical tube 30D is a tubular body extending in the front-to-back direction and has a sleeve portion 32D at one end of the rear side of the handle vertical tube 30D. The sleeve portion 32D is fitted onto the damping unit 16D of the shock absorbing device, and a positioning hole 321D is passed through the sleeve portion 32D along the left-right direction.

The connecting unit 12D of the fifth embodiment includes a front fork tube coupling portion 123D and a damping unit coupling portion 125D arranged concentrically along an axial direction A, and the damping unit coupling portion 125D is directly coupled to the front fork tube coupling portion 123D via a plurality of fasteners 19D. Specifically, the outer diameter of the front fork tube coupling 123D is larger than the outer diameter of the damping unit coupling 125D. The damping unit coupling 125D is a tubular body and radially protrudes at the bottom end to form an annular fixing ring 1251D. The fixing ring 1251D is opposite to the front fork tube coupling 123D, and the fixing ring 1251D has a plurality of fastener holes 1252D arranged in a circular manner. The plurality of fasteners 19D are screws. These fasteners 19D respectively pass through the fastener holes 1252D and are screwed to the front fork tube coupling 123D, so that the front fork tube coupling 123D and the damping unit coupling 125D are combined to form the above-mentioned connecting unit 12D.

The damping unit 16D mainly includes a body 162D, a fixing bolt 167D, a coupling member 168D and a top ring 165D. A ring-shaped flange 164D is radially extended from the bottom end of the body 162D. When the damping unit 16D is sleeved on the connecting unit 12D, the body 162D of the damping unit 16D covers the outer side of the damping unit connecting portion 125D of the connecting unit 12D, and the flange 164D abuts against the fixing ring 1251D of the connecting unit 12D. A first through-hole 122D and a second through-hole 1622D are respectively provided on the damping unit connecting portion 125D of the connecting unit 12D and the body 162D of the damping unit 16D, which are in a straight line opposite to each other. The positioning hole 321D of the handle vertical tube 30D is also in a straight line opposite to the second through-hole 1622D and the first through-hole 122D, so that the fixing bolt 16D can be fixed to the handle. 7D sequentially passes through the positioning hole 321D of the handle vertical tube 30D, the second through-hole 1622D of the damping unit 16D, and the first through-hole 122D of the connecting unit 12D. One end of the fixing bolt 167D is combined with the coupling member 168D and has the same function as the latch in the first preferred embodiment, so that the damping unit 16D can be stably fixed on the connecting unit 12D. It also enables the sleeve portion 32D at one end of the handle vertical tube 30D to be fitted on the main body 162D of the damping unit 16D and fixed, so that the handle vertical tube 30D cannot rotate relative to the connecting unit 12D or the damping unit 16D with the axis A as the rotation center, so that the handle vertical tube 30D, the connecting unit 12D and the damping unit 16D are combined into one.

In the fifth embodiment, a buffer pad 191D may be interposed between the fixing ring 1251D of the damping unit coupling portion 125D and the front fork tube coupling portion 123D. The provision of the buffer pad 191D can enhance the vibration-absorbing capability of the connection unit 12D. In this embodiment, both sides of the positioning hole 321D are countersunk holes. The fixing bolt 167D is a bolt having a first tool end 1671D. The coupling member 168D is a nut having a second tool end 1681D, allowing the coupling member 168D to be threadedly secured to the fixing bolt 167D. The first tool end 1671D and the second tool end 1681D are respectively embedded in the handlebar vertical tube 30D on both sides of the positioning hole 321D. Top ring 165D fits over connecting unit 12D and rests against the top edge of body 162D. It also abuts against a top cover 18D attached to the top of connecting unit 12D. When handlebar tube 30D is mounted on the shock absorber, sleeve portion 32D at one end of handlebar tube 30D fits securely over damping unit 16D without direct contact with connecting unit 12D. This reduces direct vibration transmission and improves riding comfort and safety.

It should be noted that, based on the explanations and elaborations in the above specification, those skilled in the art may further modify and alter the above-described embodiments. Therefore, the present disclosure is not limited to the specific embodiments disclosed and described above; equivalent modifications and variations of the present disclosure are also within the scope of protection of the claims of the present disclosure. Furthermore, while this specification employs certain terminology, these terms are used solely for convenience of explanation and do not constitute any limitation of the invention.

10, 10A, 10B, 10C: Front fork tube 12, 12A, 12B, 12C, 12D: Connecting unit 121: Locking portion 1211: Cutting groove 1212: Locking hole 122, 122B, 122C, 122D: First through-hole 123, 123A, 123B, 123C, 123D: Front fork tube connection 124: Locking fastener 125, 125A, 125B, 125C, 125D: Damper unit connection 1251D: Retaining ring 1252D: Fastener hole 14: Front fork section 16, 16A, 16B, 16C, 16D: Damper unit 162, 162A, 162B, 162C, 162D: Body 1622, 1622B, 1622C, 1622D: Second through-hole 164, 164B, 164C, 164D: Flange 166, 166C: Latch 1662: Screw hole 163A: Bottom ring 165A, 165B, 165C, 165D: Top ring 167B, 167D: Retaining bolt 1671D: First tool end 168B, 168D: Connector 1681D: Second tool end 18, 18A, 18B, 18C, 18D: Upper cover 182: Bolt 19D: Fastener 191D: Bumper 20, 20A, 20B, 20C: Headstock 30, 30A, 30B, 30C, 30D: Handlebar stubs 32B, 32C, 32D: Sleeves 321B, 321C, 321D: Positioning holes A: Axial S: Expander S1: Expander bolt

Figure 1 is a perspective view of the first embodiment of the present invention. Figure 2 is a partially exploded perspective view of the first embodiment of the present invention. Figure 3 is a top view of the first embodiment of the present invention. Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3. Figure 5 is a cross-sectional view taken along line 5-5 of Figure 3. Figure 6 is a perspective view of the second embodiment of the present invention. Figure 7 is a partially exploded perspective view of the second embodiment of the present invention. Figure 8 is a top view of the second embodiment of the present invention. Figure 9 is a cross-sectional view taken along line 9-9 of Figure 8. Figure 10 is a perspective view of the third embodiment of the present invention. Figure 11 is a partially exploded perspective view of the third embodiment of the present invention. Figure 12 is a top view of the third embodiment of the present invention. Figure 13 is a cross-sectional view taken along line 13-13 of Figure 12. Figure 14 is a perspective external view of the fourth embodiment of the present invention. Figure 15 is a partially exploded perspective view of the fourth embodiment of the present invention. Figure 16 is a top view of the fourth embodiment of the present invention. Figure 17 is a cross-sectional view taken along line 17-17 of Figure 16. Figure 18 is a cross-sectional view taken along line 18-18 of Figure 16. Figure 19 is a perspective external view of the fifth embodiment of the present invention. Figure 20 is a partially exploded perspective view of the fifth embodiment of the present invention. Figure 21 is a top view of the fifth embodiment of the present invention. Figure 22 is a cross-sectional view taken along line 22-22 of Figure 21. Figure 23 is a cross-sectional view taken along line 23-23 of Figure 21.

12: Connection unit

121: Locking section

1211: Grooving

1212: Locking hole

122: First Perforation

123: Front fork tube joint

124: Lock Firmware

125: Damping unit joint

16: Damping unit

162: Body

1622: Second Perforation

164: flange

166: Latch

1662: Screw hole

18: Upper cover

182: Bolts

20: Front pipe

30:Handle vertical tube

A: Axial

Claims (10)

A shock absorbing device for a bicycle front fork tube includes a damping unit and a connecting unit. The damping unit includes a main body extending along an axial direction and can be connected to a handlebar vertical tube of a bicycle through the main body. The connecting unit is provided with a front fork tube connecting portion and a damping unit connecting portion. The outer diameter of the front fork tube connecting portion is larger than the outer diameter of the damping unit connecting portion. The main body of the damping unit is sleeved on and covered by the damping unit connecting portion of the connecting unit. The front fork tube connecting portion is used to connect to a front fork tube of the bicycle, and the damping unit connecting portion is used to connect to the damping unit. A shock absorbing device for a bicycle front fork tube as described in claim 1, wherein the front fork tube joint covers the front fork tube, and the front fork tube joint is provided with a locking portion for a locking member to be engaged to fix the front fork tube joint to the front fork tube. A shock absorbing device for a bicycle front fork tube as described in claim 2, wherein the inner diameter of the front fork tube joint is larger than the inner diameter of the damping unit joint, and the outer surface of the main body is provided with a flange extending radially outward, and the flange at least partially covers the front fork tube joint. A shock absorbing device for a bicycle front fork tube as described in claim 1, wherein a first perforation is provided on the damping unit coupling portion, and a second perforation is provided on the main body corresponding to the first perforation; after the main body is coupled to the damping unit coupling portion, a pin is passed through the first perforation and the second perforation to couple the damping unit and the connecting unit. As described in claim 4, the shock absorbing device for the front fork tube of a bicycle is provided with a screw hole, and a top cover is provided at the top end of the connecting unit, and the top cover is screwed into the screw hole by a bolt to fix the top cover to one end of the damping unit joint. A shock absorbing device for a bicycle front fork tube as described in claim 4, wherein the pin includes a fixing bolt and a coupling piece, one end of the fixing bolt is coupled to the coupling piece, and the coupling piece rests against the outside of the main body. A shock absorbing device for a bicycle front fork tube as described in claim 4, wherein the pin includes a fixing bolt and a coupling part, the fixing bolt is coupled to the coupling part, the fixing bolt has a first tool end, the coupling part has a second tool end, and the first tool end and the second tool end are arranged on the handlebar vertical tube. A shock absorbing device for a bicycle front fork tube as described in claim 1, wherein the damping unit and the connecting unit are made of different materials. A shock absorbing device for a bicycle front fork tube as described in claim 8, wherein the material of one of the damping unit or the connecting unit is non-metallic. A shock absorbing device for a bicycle front fork tube as described in claim 8, wherein the elastic coefficients of the damping unit and the connecting unit are different, and the elastic coefficient of the damping unit is greater than the elastic coefficient of the connecting unit.