Bicycle front fork with adjustable hardness

Abstract

The hardness-adjustable bicycle front fork comprises a vertical pipe, a connecting pipe is arranged at the bottom of the vertical pipe, a connecting piece is welded to the bottom end of the vertical pipe, the end, away from the vertical pipe, of the connecting piece is embedded in the inner wall of the connecting pipe, and an adjusting mechanism is arranged on the inner wall of the bottom of the connecting pipe. The adjusting mechanism comprises a threaded cylinder, a threaded ejector rod, an adjusting knob and a protective cover, the threaded cylinder is connected with the inner wall of the bottom end of the connecting pipe through a bearing, and the inner wall of the top of the threaded cylinder is in threaded connection with the threaded ejector rod; the extension length of the vertical pipe can be adjusted through the adjusting mechanism, so that the head height of the whole bicycle is adjusted, people with different requirements can use the bicycle conveniently, meanwhile, an upper adjusting knob or a lower adjusting knob can be twisted independently, and hardness adjustment can be conducted on dampers at the upper sleeve and the lower sleeve independently; therefore, the multi-stage adjustment of the buffering hardness is realized.

Description

Technical Field

[0001] The present application relates to the field of bicycle front forks, and more specifically, to a bicycle front fork with adjustable hardness and softness. Background Art

[0002] The front fork of a bicycle is an important component that connects the frame and the front wheel. It not only provides support but also acts as a shock absorber. The upper end of the front fork is connected to the handlebar component, the frame component cooperates with the front tube, and the lower end cooperates with the front axle component to form the guidance system of the bicycle.

[0003] After searching, the existing patent (publication number: CN107585246A) discloses a bicycle lockable front fork, including a vertical tube, a front fork crown, an outer tube and an inner tube, one end of the vertical tube is fixed in the front fork crown by threaded connection and gluing, an outer tube is fixed at each end of the lower part of the front fork crown, the inner tube is telescopically arranged in the outer tube, the outer tube is filled with oil, an oil seal is arranged at the bottom of the outer tube, a connecting piece is arranged at the connection end of the bottom of the inner tube and the front wheel transverse axis, a through hole is arranged on the connecting piece, and a through hole is arranged on the connecting piece to connect with the front wheel transverse axis, a shock absorber group is arranged in one of the inner tubes, and an oil pressure locking group is arranged in the other inner tube. The present invention can reduce the weight of the front fork, so that the bicycle can be suitable for a variety of users and occasions, and the connection design between the vertical tube and the front fork crown of the front fork can prevent the vertical tube from falling off during use, improve the stability, safety and service life of the front fork, and it will become smoother and smoother in use. In the process of implementing this application, the inventor discovered that the prior art has the following problems:

[0004] The seat tube of the existing bicycle front fork often only has a single fixing function, and its height cannot be adjusted for riders of different heights. At the same time, the current bicycle front fork often only has a single-level buffering effect and does not have multi-level buffering, and cannot have the function of adjusting the buffering hardness at different levels;

[0005] Therefore, a soft and hard adjustable bicycle front fork is proposed to solve the above problems. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present application provides a bicycle front fork with adjustable hardness and softness to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a bicycle front fork with adjustable hardness and softness, comprising a seat tube, a connecting tube is arranged at the bottom of the seat tube, a connecting piece is welded at the bottom end of the seat tube, an end of the connecting piece away from the seat tube is embedded in the inner wall of the connecting tube, the bottom end of the connecting tube is connected to a connecting beam, both sides of the inner walls of the connecting tube are provided with strip grooves, both sides of the outer walls of the connecting piece are connected with limit blocks, the limit blocks are embedded in the strip grooves, an adjustment mechanism is arranged on the bottom inner wall of the connecting tube, the adjustment mechanism comprises a threaded barrel, a threaded push rod, an adjustment knob and a protective cover, the threaded barrel is connected to the inner wall of the bottom end of the connecting tube through a bearing, a threaded push rod is threadedly connected to the top inner wall of the threaded barrel, the end of the threaded push rod away from the threaded barrel is connected to the connecting piece, and an adjustment knob is arranged at the bottom center of the connecting beam.

[0008] Preferably, the output end of the adjusting knob is connected to the threaded barrel through a connecting pipe, the outer wall of the adjusting knob is sleeved with a protective cover, and the protective cover is connected to the connecting beam by a snap hinge, and twisting the adjusting knob drives the threaded barrel to rotate, and the rotation of the threaded barrel drives the threaded push rod to perform a lifting movement, and the lifting of the threaded push rod drives the connecting piece and the vertical pipe to perform synchronous lifting movements, and a connecting joint is provided on the top of the vertical pipe.

[0009] Preferably, both ends of the bottom of the connecting beam are connected to the bottom of the upper sleeve, and a lower sleeve is provided, a stroke tube is provided between the upper sleeve and the lower sleeve, and both ends of the stroke tube are respectively embedded in the interior of the upper sleeve and the lower sleeve, and both ends of the stroke tube are connected to pistons, and two groups of pistons are respectively fitted with the inner walls of the upper sleeve and the lower sleeve, and damping holes are arranged at the edge of the pistons, and an oil storage cavity is provided inside the side opposite to the upper sleeve and the lower sleeve.

[0010] Preferably, an outer wall of the stroke tube is sleeved with an adjusting cylinder, both ends of the adjusting cylinder are connected to a No. 1 rotating disk, one end of two groups of No. 1 rotating disks are both in contact with the piston, and a No. 1 adjusting hole is arranged at the edge of the No. 1 rotating disk, and the No. 1 adjusting hole corresponds to the damping hole.

[0011] Preferably, oil seals are provided at the edges of the upper sleeve and the lower sleeve, an arc-shaped slideway is provided on the middle outer wall of the stroke tube, a positioning top block is provided on one side of the inner wall of the adjustment cylinder, and the positioning top block is embedded in the arc-shaped slideway.

[0012] Preferably, the ends of the two groups of pistons away from the No. 1 rotating disk are connected to the No. 2 rotating disk through a rotating shaft, the No. 2 rotating disk abuts against the piston, and No. 2 adjusting holes are arranged at the edge of the No. 2 rotating disk, and the No. 2 adjusting holes correspond to the damping holes, and the inner walls of the ends of the upper sleeve and the lower sleeve away from the stroke tube are connected to support springs, the elastic forces of the two groups of support springs are different, and the ends of the support springs abut against the No. 2 rotating disk.

[0013] Preferably, a hard-soft adjustment mechanism is provided at the end of the No. 2 rotating disk away from the piston, and the hard-soft adjustment mechanism includes a telescopic cylinder, a telescopic rod, a slide groove and a slider. The center of one end of the No. 2 rotating disk is connected with the telescopic rod, and the end of the telescopic rod away from the No. 2 rotating disk is sleeved with the telescopic cylinder.

[0014] Preferably, one end of the two groups of telescopic tubes away from the telescopic rod is respectively connected to the inner walls of the upper sleeve and the lower sleeve through bearings, the inner walls on both sides of the telescopic tube are provided with sliding grooves, and the outer walls on both sides of the telescopic rod are connected to sliders, and the sliders are embedded in the sliding grooves.

[0015] Preferably, an upper adjusting knob is provided on one side of the top of the connecting beam, and a lower adjusting knob is provided at the bottom center of the lower sleeve, the output ends of the upper adjusting knob and the lower adjusting knob are respectively connected to the two groups of telescopic tubes, a front wheel connecting seat is provided on one side of the bottom of the two groups of lower sleeves, and a disc brake connecting seat is provided on the top of the front wheel connecting seat.

[0016] Technical effects and advantages of this application:

[0017] 1. Compared with the prior art, the soft and hard adjustable bicycle front fork can adjust the extension length of the seat tube through the adjustment mechanism, thereby adjusting the height of the front of the entire bicycle, so as to adapt to the use of people with different needs. When adjustment is needed, the protective cover can be opened first, and the threaded barrel can be rotated by twisting the adjustment knob, and the threaded barrel can drive the threaded push rod to move up and down. The lifting of the threaded push rod drives the connecting piece and the seat tube to move up and down synchronously, thereby adjusting the height of the seat tube. At the same time, the spiral angle between the threaded barrel and the threaded push rod is small, so that a self-locking effect can be achieved.

[0018] 2. Compared with the prior art, the oil storage chamber of the bicycle front fork with adjustable hardness and softness is provided with hydraulic oil, and two groups of pistons are respectively arranged in the upper sleeve and the lower sleeve to realize two groups of buffer systems and thus realize the secondary buffering effect. When the bicycle is under pressure, the upper sleeve is squeezed downward and the stroke tube is squeezed and compressed in the direction of the lower sleeve. When the two groups of support springs are compressed, the oil flows through the damping hole, thereby slowing down the movement speed of the spring, and the shock-absorbing effect is achieved by changing the flow of the oil.

[0019] 3. Compared with the prior art, the bicycle front fork with adjustable hardness and softness can be rotated along the outer wall of the stroke tube by twisting the adjusting cylinder when facing different road sections. The rotation of the adjusting cylinder drives the No. 1 rotating disk at both ends to rotate synchronously, and the No. 1 rotating disk thereby drives the No. 1 adjusting hole to rotate so that the No. 1 adjusting hole and the damping hole are misaligned, thereby adjusting the aperture of the damping hole. The aperture of the damping hole is adjusted so that the speed of oil flow is changed, thereby adjusting the softness and hardness of the shock absorption of the front fork. When the No. 1 adjusting hole and the damping hole are completely misaligned, the damping hole can be blocked so that the oil cannot pass through and lock the stroke tube with the upper sleeve and the lower sleeve. By twisting the adjusting cylinder, the synchronous adjustment of the shock absorption hardness and softness of the upper sleeve and the lower sleeve for the stroke tube can be achieved, so that it can be quickly locked when riding on the road. At the same time, the upper adjustment knob or the lower adjustment knob can be twisted separately to adjust the softness and hardness of the damping at the upper sleeve and the lower sleeve separately, thereby realizing multi-level adjustment of the softness and hardness of the buffer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of this application;

[0021] Figure 2 A schematic diagram for the present application;

[0022] Figure 3 This is a schematic diagram of the internal structure of the lower sleeve of the present application;

[0023] Figure 4 This is a schematic diagram of the connection structure between the stroke tube and the piston of the present application;

[0024] Figure 5 This is a schematic diagram of the connection structure between the arc-shaped slideway and the positioning top block of the present application;

[0025] Figure 6 This is a schematic diagram of the adjustment mechanism structure of this application:

[0026] Figure 7 This is a schematic diagram of the soft and hard adjustment mechanism structure of this application.

[0027] The accompanying drawings are marked as follows: 1. vertical pipe; 2. connecting pipe; 3. connecting piece; 4. connecting beam; 5. strip groove; 6. limit block; 7. adjustment mechanism; 8. threaded cylinder; 9. threaded push rod; 10. adjustment knob; 11. protective cover; 12. connecting joint; 13. upper sleeve; 14. stroke tube; 15. lower sleeve; 16. piston; 17. damping hole; 18. oil storage chamber; 19. adjustment cylinder; 20. No. 1 rotating disk; 21. No. 1 adjustment hole; 22. oil seal; 23. arc slide; 24. positioning push block; 25. No. 2 rotating disk; 26. No. 2 adjustment hole; 27. support spring; 28. soft and hard adjustment mechanism; 29. ​​telescopic cylinder; 30. telescopic rod; 31. slide groove; 32. slider; 33. upper adjustment knob; 34. lower adjustment knob; 35. front wheel connecting seat; 36. disc brake connecting seat. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Example 1

[0030] As attached Figures 1 to 6 A bicycle front fork with adjustable hardness and softness shown in the figure comprises a seat tube 1, a connecting tube 2 is arranged at the bottom of the seat tube 1, a connecting piece 3 is welded to the bottom end of the seat tube 1, an end of the connecting piece 3 away from the seat tube 1 is embedded in the inner wall of the connecting tube 2, the bottom end of the connecting tube 2 is connected to a connecting beam 4, both sides of the inner walls of the connecting tube 2 are provided with strip grooves 5, both sides of the outer walls of the connecting piece 3 are connected with limit blocks 6, the limit blocks 6 are embedded in the strip grooves 5, an adjustment mechanism 7 is arranged on the bottom inner wall of the connecting tube 2, the adjustment mechanism 7 comprises a threaded barrel 8, a threaded push rod 9, an adjustment knob 10 and a protective cover 11, the threaded barrel 8 is connected to the inner wall of the bottom end of the connecting tube 2 through a bearing, the top inner wall of the threaded barrel 8 is threadedly connected with a threaded push rod 9, the end of the threaded push rod 9 away from the threaded barrel 8 is connected to the connecting piece 3, and an adjustment knob 10 is arranged at the bottom center of the connecting beam 4.

[0031] Among them, the stand pipe 1 plays the role of connecting support, and can be connected to the bicycle frame through the connecting joint 12. The stand pipe 1 can be embedded in the strip groove 5 through the limit blocks 6 on both sides of the connecting piece 3 so that it can perform lifting and translational movements on the inner wall of the connecting pipe 2. The extension length of the stand pipe 1 can be adjusted through the adjustment mechanism 7 to adjust the height of the front of the entire bicycle, so as to adapt to the use of people with different needs. When adjustment is needed, the protective cover 11 can be opened first, and the threaded barrel 8 can be rotated by twisting the adjustment knob 10, and the threaded barrel 8 is rotated to drive the threaded push rod 9 to perform lifting and lowering movements. The lifting of the threaded push rod 9 drives the connecting piece 3 and the stand pipe 1 to perform synchronous lifting and lowering movements, so as to adjust the height of the stand pipe 1. At the same time, the spiral angle between the threaded barrel 8 and the threaded push rod 9 is small, so that a self-locking effect can be achieved.

[0032] Example 2

[0033] Based on Example 1, the solution in Example 1 is further detailed in combination with the following specific working method. Figures 1 to 7 As shown, see the following description for details:

[0034] As a preferred embodiment, the output end of the adjusting knob 10 is connected to the threaded barrel 8 through the connecting pipe 2, and the outer wall of the adjusting knob 10 is sleeved with a protective cover 11, and the protective cover 11 is connected to the connecting beam 4 by a snap hinge. The adjusting knob 10 is twisted to rotate and drive the threaded barrel 8 to rotate, and the rotation of the threaded barrel 8 drives the threaded push rod 9 to perform a lifting movement, and the lifting of the threaded push rod 9 drives the connecting member 3 and the vertical pipe 1 to perform synchronous lifting and lowering movements. A connecting joint 12 is provided on the top of the vertical pipe 1, wherein the adjusting knob 10 plays an adjusting role. At the same time, the protective cover 11 can be covered on the outer wall of the adjusting knob 10 when no adjustment is performed to avoid accidental touch causing the adjusting knob 10 to rotate.

[0035] As a preferred embodiment, both ends of the bottom of the connecting beam 4 are connected to the upper sleeve 13, and the bottom is provided with a lower sleeve 15. A stroke tube 14 is provided between the upper sleeve 13 and the lower sleeve 15. The two ends of the stroke tube 14 are respectively embedded in the upper sleeve 13 and the lower sleeve 15. The two ends of the stroke tube 14 are connected to pistons 16. The two groups of pistons 16 are respectively fitted with the inner walls of the upper sleeve 13 and the lower sleeve 15. Damping holes 17 are arranged at the edges of the pistons 16. The upper sleeve 13 and the lower sleeve 15 are opposite to each other. An oil storage chamber 18 is provided inside one side, wherein hydraulic oil is provided in the oil storage chamber 18. Two groups of pistons 16 are respectively provided in the upper sleeve 13 and the lower sleeve 15 to realize two groups of buffer systems and thus realize a secondary buffering effect. When the bicycle is under pressure, the upper sleeve 13 is squeezed downward while the stroke tube 14 is squeezed and compressed in the direction of the lower sleeve 15. When the two groups of support springs 27 are compressed, the oil flows through the damping hole 17, thereby slowing down the movement speed of the spring, and realizing the shock-absorbing effect by changing the flow of the oil.

[0036] As a preferred embodiment, the outer wall of the stroke tube 14 is sleeved with an adjusting cylinder 19, and both ends of the adjusting cylinder 19 are connected to a No. 1 rotating disk 20, one end of the two groups of No. 1 rotating disks 20 are both in contact with the piston 16, and a No. 1 adjusting hole 21 is arranged at the edge of the No. 1 rotating disk 20, and the No. 1 adjusting hole 21 corresponds to the damping hole 17. When facing different road sections, the adjusting cylinder 19 can be rotated along the outer wall of the stroke tube 14 by twisting, and the rotation of the adjusting cylinder 19 drives the No. 1 rotating disks 20 at both ends to rotate synchronously, and the No. 1 rotating disk 20 thereby drives the No. 1 adjusting hole 21 to rotate so as to The No. 1 adjusting hole 21 is misaligned with the damping hole 17 to adjust the aperture of the damping hole 17. The aperture of the damping hole 17 is adjusted to change the flow rate of the oil to adjust the shock absorbing hardness of the front fork. When the No. 1 adjusting hole 21 is completely misaligned with the damping hole 17, the damping hole 17 can be blocked so that the oil cannot pass through and lock the stroke tube 14 with the upper sleeve 13 and the lower sleeve 15. By twisting the adjusting cylinder 19, the upper sleeve 13 and the lower sleeve 15 can be synchronously adjusted for the shock absorbing hardness of the stroke tube 14, so as to quickly lock it when riding on the road.

[0037] As a preferred embodiment, oil seals 22 are provided at the edges of the upper sleeve 13 and the lower sleeve 15, an arc-shaped slideway 23 is provided on the middle outer wall of the stroke tube 14, and a positioning top block 24 is provided on one side of the inner wall of the adjusting cylinder 19. The positioning top block 24 is embedded in the arc-shaped slideway 23, wherein the oil seal 22 plays a sealing role, and the rotation of the adjusting cylinder 19 can drive the positioning top block 24 to slide in the arc-shaped slideway 23. When the positioning top block 24 rotates to the two ends of the arc-shaped slideway 23, it stops rotating, so that the connection state of the damping hole 17 between the stroke tube 14 and the upper sleeve 13 and the lower sleeve 15 can be judged, one end is in a locked state, and the other end is in a mutually connected state, so as to facilitate judgment during adjustment.

[0038] As a preferred embodiment, the ends of the two groups of pistons 16 away from the No. 1 rotating disk 20 are connected to the No. 2 rotating disk 25 through a rotating shaft, and the No. 2 rotating disk 25 abuts against the piston 16. No. 2 adjusting holes 26 are arranged at the edge of the No. 2 rotating disk 25, and the No. 2 adjusting holes 26 correspond to the damping holes 17. The inner walls of the ends of the upper sleeve 13 and the lower sleeve 15 away from the stroke tube 14 are connected with support springs 27. The elastic forces of the two groups of support springs 27 are different, and the ends of the support springs 27 abut against the No. 2 rotating disk 25. The different elastic forces of the two groups of support springs 27 make the damping effects between the upper sleeve 13 and the lower sleeve 15 different, so as to facilitate progressive secondary buffering. The No. 2 rotating disks 25 and the No. 2 adjusting holes 26 on both sides can be regulated separately to facilitate unilateral damping adjustment of the upper sleeve 13 or the lower sleeve 15, so as to adjust different buffering hardnesses.

[0039] As a preferred embodiment, a hard-soft adjustment mechanism 28 is provided at the end of the No. 2 rotating disk 25 away from the piston 16, and the hard-soft adjustment mechanism 28 includes a telescopic cylinder 29, a telescopic rod 30, a slide groove 31 and a slider 32. The telescopic rod 30 is connected at the center of one end of the No. 2 rotating disk 25, and the telescopic cylinder 29 is sleeved on the end of the telescopic rod 30 away from the No. 2 rotating disk 25, wherein the upper sleeve 13 or the lower sleeve 15 can be adjusted individually through the hard-soft adjustment mechanisms 28 on both sides.

[0040] As a preferred embodiment, one end of the two sets of telescopic cylinders 29 away from the telescopic rod 30 is respectively connected to the inner walls of the upper sleeve 13 and the lower sleeve 15 through bearings, and the inner walls on both sides of the telescopic cylinder 29 are provided with sliding grooves 31, and the outer walls on both sides of the telescopic rod 30 are connected with sliders 32, and the sliders 32 are embedded in the sliding grooves 31, wherein the telescopic rod 30 can be embedded in the telescopic cylinder 29 to facilitate compression during buffering, and at the same time, the slider 32 is embedded in the sliding groove 31 so that the telescopic rod 30 and the telescopic cylinder 29 can rotate synchronously to facilitate the rotation adjustment of the No. 2 rotating disk 25.

[0041] As a preferred embodiment, an upper adjusting knob 33 is provided on the top side of the connecting beam 4, and a lower adjusting knob 34 is provided at the bottom center of the lower sleeve 15. The output ends of the upper adjusting knob 33 and the lower adjusting knob 34 are respectively connected to the two groups of telescopic cylinders 29, and a front wheel connecting seat 35 is provided on the bottom side of the two groups of lower sleeves 15. A disc brake connecting seat 36 is provided on the top of the front wheel connecting seat 35, wherein, by twisting the upper adjusting knob 33, the hardness and softness adjustment mechanism 28 on the top can be driven to rotate, thereby driving the No. 2 rotating disk 25 to rotate, and the damping hole 17 in the upper sleeve 13 is adjusted through the No. 2 adjustment hole 26 to achieve hardness and softness adjustment of the damping at the upper sleeve 13, conversely, twisting the lower adjusting knob 34 can adjust the hardness and softness of the damping at the lower sleeve 15, thereby achieving multi-level adjustment of the softness and hardness of the buffer, the front wheel of the bicycle can be connected and fixed through the front wheel connecting seat 35, and the disc brake system of the bicycle can be fixedly connected through the disc brake connecting seat 36.

[0042] The working process of the present application is as follows: first, the bicycle frame can be connected through the connecting joint 12, and the stand pipe 1 can be embedded in the strip groove 5 through the limit blocks 6 on both sides of the connecting piece 3 so that it can be lifted and translated on the inner wall of the connecting pipe 2. The extension length of the stand pipe 1 can be adjusted through the adjustment mechanism 7 to adjust the height of the front of the entire bicycle, so as to adapt to the use of people with different needs. When adjustment is needed, the protective cover 11 can be opened first, and the threaded cylinder 8 can be rotated by twisting the adjustment knob 10, and the threaded cylinder 8 can be rotated to drive the threaded push rod 9 to lift and lower. The lifting of the threaded push rod 9 drives the connecting piece 3 and the stand pipe 1 to perform synchronous lifting and lowering movements, thereby adjusting the height of the stand pipe 1, and at the same time, the threaded cylinder 8 and the threaded push rod 9 are moved. The spiral angle between them is small so that a self-locking effect can be achieved. Hydraulic oil is arranged in the oil storage chamber 18. Two groups of pistons 16 are respectively arranged in the upper sleeve 13 and the lower sleeve 15 to realize two groups of buffer systems to realize a secondary buffering effect. When the bicycle is under pressure, the upper sleeve 13 is squeezed downward while the stroke tube 14 is squeezed and compressed in the direction of the lower sleeve 15. When the two groups of support springs 27 are compressed, the oil flows through the damping hole 17, thereby slowing down the movement speed of the spring. The shock absorption effect is achieved by changing the flow of the oil. When facing different road sections, the adjusting cylinder 19 can be rotated along the outer wall of the stroke tube 14 by twisting. The rotation of the adjusting cylinder 19 drives the No. 1 rotating disk 20 at both ends to rotate synchronously. The No. 1 rotating disk 20 drives the No. 1 adjusting hole 21 to rotate so as to The No. 1 adjusting hole 21 is misaligned with the damping hole 17 to adjust the aperture of the damping hole 17. The aperture of the damping hole 17 is adjusted to change the speed of the oil flow, thereby adjusting the shock absorbing hardness of the front fork. When the No. 1 adjusting hole 21 is completely misaligned with the damping hole 17, the damping hole 17 can be blocked so that the oil cannot pass through the stroke tube 14 and the upper sleeve 13 and the lower sleeve 15. By twisting the adjusting cylinder 19, the upper sleeve 13 and the lower sleeve 15 can be synchronously adjusted for the shock absorbing hardness of the stroke tube 14, so as to quickly lock it during road riding. The rotation of the adjusting cylinder 19 can drive the positioning top block 24 to slide in the arc slide 23. When the positioning top block 24 rotates to the two ends of the arc slide 23, it stops rotating, so that it can Determine the connection state of the damping hole 17 between the stroke tube 14 and the upper sleeve 13 and the lower sleeve 15. One end is in a locked state and the other end is in a mutually connected state, so as to facilitate the judgment during adjustment. The different elastic forces of the two groups of support springs 27 make the damping effect between the upper sleeve 13 and the lower sleeve 15 different, so as to facilitate progressive secondary buffering. The No. 2 rotating disk 25 and the No. 2 adjusting hole 26 on both sides can be adjusted separately to facilitate unilateral damping adjustment of the upper sleeve 13 or the lower sleeve 15, so as to adjust different buffering hardness. By twisting the upper adjusting knob 33, the hardness and softness adjustment mechanism 28 at the top can be driven to rotate, thereby driving the No. 2 rotating disk 25 to rotate, and adjusting the damping hole 17 in the upper sleeve 13 through the No. 2 adjusting hole 26.The damping at the upper sleeve 13 can be adjusted softly or hardly, and vice versa, the damping at the lower sleeve 15 can be adjusted softly or hardly by twisting the lower adjustment knob 34, thereby realizing multi-level adjustment of the softness or hardness of the buffer. The front wheel of the bicycle can be connected and fixed through the front wheel connecting seat 35, and the disc brake system of the bicycle can be fixedly connected through the disc brake connecting seat 36. The above is the working principle of the soft and hard adjustable bicycle front fork.

Claims

1. A bicycle front fork with adjustable hardness and softness, comprising a seat tube (1), characterized in that: A connecting pipe (2) is arranged at the bottom of the riser (1), a connecting piece (3) is welded to the bottom end of the riser (1), an end of the connecting piece (3) away from the riser (1) is embedded in the inner wall of the connecting pipe (2), the bottom end of the connecting pipe (2) is connected to a connecting beam (4), both sides of the inner wall of the connecting pipe (2) are provided with strip grooves (5), both sides of the outer wall of the connecting piece (3) are connected to limit blocks (6), the limit blocks (6) are embedded in the strip grooves (5), the bottom of the connecting pipe (2) is provided with a connecting beam (4), and the connecting pipe (2) is provided with a connecting beam (4). An adjusting mechanism (7) is arranged on the inner wall of the connecting pipe (2), and the adjusting mechanism (7) comprises a threaded barrel (8), a threaded push rod (9), an adjusting knob (10) and a protective cover (11). The threaded barrel (8) is connected to the inner wall of the bottom end of the connecting pipe (2) through a bearing. The threaded push rod (9) is threadedly connected to the inner wall of the top of the threaded barrel (8). The end of the threaded push rod (9) away from the threaded barrel (8) is connected to the connecting member (3). The adjusting knob (10) is arranged at the bottom center of the connecting beam (4).

2. The bicycle front fork with adjustable hardness and softness according to claim 1, characterized in that: The output end of the adjusting knob (10) passes through the connecting pipe (2) and is connected to the threaded tube (8); the outer wall of the adjusting knob (10) is sleeved with a protective cover (11); the protective cover (11) is connected to the connecting beam (4) via a snap-on hinge; the adjusting knob (10) is twisted to rotate and drive the threaded tube (8) to rotate; the threaded tube (8) rotates and drives the threaded push rod (9) to move up and down; the lifting and lowering of the threaded push rod (9) drives the connecting piece (3) and the vertical tube (1) to move up and down synchronously; and a connecting joint (12) is provided at the top of the vertical tube (1).

3. The bicycle front fork with adjustable hardness and softness according to claim 1, characterized in that: The bottom ends of the connecting beam (4) are connected to an upper sleeve (13), and a lower sleeve (15) is arranged at the bottom thereof; a travel tube (14) is arranged between the upper sleeve (13) and the lower sleeve (15); the two ends of the travel tube (14) are respectively embedded in the interior of the upper sleeve (13) and the lower sleeve (15); the two ends of the travel tube (14) are connected to pistons (16); two groups of pistons (16) are respectively fitted with the inner walls of the upper sleeve (13) and the lower sleeve (15); damping holes (17) are arranged at the edge of the pistons (16); and an oil storage cavity (18) is arranged inside the side of the upper sleeve (13) opposite to the lower sleeve (15).

4. The bicycle front fork with adjustable hardness and softness according to claim 3, characterized in that: The outer wall of the stroke tube (14) is sleeved with an adjusting cylinder (19), both ends of the adjusting cylinder (19) are connected to a No. 1 rotating disk (20), one end of two groups of the No. 1 rotating disks (20) are in contact with the piston (16), and a No. 1 adjusting hole (21) is arranged at the edge of the No. 1 rotating disk (20), and the No. 1 adjusting hole (21) corresponds to the damping hole (17).

5. The bicycle front fork with adjustable hardness and softness according to claim 4, characterized in that: Oil seals (22) are provided at the edges of the upper sleeve (13) and the lower sleeve (15), an arc-shaped slideway (23) is provided on the middle outer wall of the stroke tube (14), and a positioning top block (24) is provided on one side of the inner wall of the adjustment cylinder (19), and the positioning top block (24) is embedded in the arc-shaped slideway (23).

6. The bicycle front fork with adjustable hardness and softness according to claim 5, characterized in that: The ends of the two groups of pistons (16) away from the first rotating disk (20) are connected to the second rotating disk (25) through a rotating shaft, and the second rotating disk (25) is in contact with the piston (16). The edge of the second rotating disk (25) is provided with second adjustment holes (26), and the second adjustment holes (26) correspond to the damping holes (17). The inner walls of the ends of the upper sleeve (13) and the lower sleeve (15) away from the stroke tube (14) are connected to support springs (27). The elastic forces of the two groups of support springs (27) are different, and the ends of the support springs (27) are in contact with the second rotating disk (25).

7. The hardness-adjustable bicycle front fork according to claim 6, characterized in that: A hardness / softness adjustment mechanism (28) is arranged at one end of the second rotating disk (25) away from the piston (16), and the hardness / softness adjustment mechanism (28) comprises a telescopic cylinder (29), a telescopic rod (30), a slide groove (31) and a slider (32). The center of one end of the second rotating disk (25) is connected with the telescopic rod (30), and the end of the telescopic rod (30) away from the second rotating disk (25) is sleeved with the telescopic cylinder (29).

8. The bicycle front fork with adjustable hardness and softness according to claim 7, characterized in that: One end of the two groups of telescopic cylinders (29) away from the telescopic rod (30) is respectively connected to the inner wall of the upper sleeve (13) and the lower sleeve (15) through bearings, and the inner walls on both sides of the telescopic cylinder (29) are provided with sliding grooves (31), and the outer walls on both sides of the telescopic rod (30) are connected with sliding blocks (32), and the sliding blocks (32) are embedded in the sliding grooves (31).

9. The bicycle front fork with adjustable hardness and softness according to claim 8, characterized in that: An upper adjusting knob (33) is provided on one side of the top of the connecting beam (4), and a lower adjusting knob (34) is provided at the center of the bottom of the lower sleeve (15). The output ends of the upper adjusting knob (33) and the lower adjusting knob (34) are respectively connected to the two groups of telescopic cylinders (29). A front wheel connecting seat (35) is provided on one side of the bottom of the two groups of lower sleeves (15), and a disc brake connecting seat (36) is provided on the top of the front wheel connecting seat (35).

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