A connecting rod type suspension front fork structure for a bicycle

Abstract

The present invention relates to the field of bicycle shock absorption technology, comprising a connecting adjustment device, a first buffering guard device, and a second buffering guard device. The first buffering guard device and the second buffering guard device are arranged at the bottom end of the connecting adjustment device, and the first buffering guard device and the second buffering guard device have the same structure. The connecting adjustment device comprises an upper supporting connecting tube, a fork arm, and a connecting end head. The connecting end head is fixedly connected to the bottom ends of the fork arm, and the upper supporting connecting tube is fixedly installed at the middle upper end of the fork arm by bolts. The two ends of the buffer connecting rod arm of the present invention can rotate inside the end heads of the buffer adjusting adjusting arm and the buffer adjusting supporting plate, so that the angle of the buffer connecting rod arm changes, thereby stabilizing and assisting the buffering and shock absorption adjustment between the buffer adjusting adjusting arm, the buffer connecting rod arm, and the buffer adjusting supporting plate, so that the buffering and shock absorption process is safe and stable.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle shock absorption, in particular to a connecting rod type shock absorbing front fork structure of a bicycle. Background Art

[0002] A suspension fork is a crucial bicycle component, absorbing impact from the road and enhancing riding comfort and stability. A suspension fork typically consists of an upper tube, fork crown, crown cap, travel tube, fork barrel, fork legs, and brake seat. Depending on the type of shock absorber, suspension forks can be categorized as spring forks, oil spring forks, hydro-pneumatic forks, and dual-gas forks. Each type of suspension fork offers distinct characteristics and applications.

[0003] A bicycle suspension front fork with Chinese patent publication number CN219506176U comprises a front fork leg, the top of which is fixedly connected to a stem guide post, the outer side of which is slidably sleeved with a stem, a shock absorber assembly mounted within the stem guide post, a rod head screw connected to the top of the shock absorber assembly, the end of the rod head screw distal from the shock absorber assembly extending through the top of the stem guide post and removably connected to the stem, an upper sleeve fixedly connected to the end of the stem connected to the stem guide post, a plurality of guide posts mounted on the side of the upper sleeve facing the front fork leg, a plurality of guide holes defined around the stem guide post at the top of the front fork leg, the ends of the guide posts distal from the upper sleeve slidably engaging with the guide holes. By locating the shock absorber assembly in the center of the stem guide post, the shock absorber assembly is always subjected to forces directly above it, effectively maximizing its shock absorption capacity and enhancing the user experience.

[0004] The above-mentioned device and the existing bicycle suspension front fork have poor shock absorption effect during use, and poor stability during use, and cannot stably and safely perform shock absorption processing. The shock absorption structure is simple and easy to damage. Therefore, a device is needed to solve the above-mentioned problems. Summary of the Invention

[0005] In view of the problems in the prior art, the present invention provides a link type suspension front fork structure for a bicycle.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a link-type suspension front fork structure of a bicycle, including a connecting adjustment device, a first buffer protection device and a second buffer protection device, the first buffer protection device and the second buffer protection device are arranged at the bottom end of the connecting adjustment device, and the first buffer protection device and the second buffer protection device have the same structure, the connecting adjustment device includes an upper support connecting tube, a fork arm and a connecting end head, the connecting end head is fixedly connected to the bottom of both ends of the fork arm, and the upper support connecting tube is fixedly installed on the middle upper end of the fork arm by bolts.

[0007] Preferably, the first buffer protection device and the second buffer protection device both include a threaded connecting tube, a buffer adjustment adjustment arm, a buffer connecting rod arm, a buffer adjustment support plate, a limit buffer fork cylinder, a connecting fork foot, a limit support ring, a main buffer adjustment spring, a stroke buffer tube and a rotating connecting shaft, the connecting fork foot is fixedly connected to the inner side of the bottom end of the limit buffer fork cylinder, the limit support ring is fixedly connected to the bottom of the limit buffer fork cylinder, the main buffer adjustment spring is arranged on the limit support ring, and the limit buffer fork cylinder is located inside the main buffer adjustment spring, and the bottom end of the main buffer adjustment spring is clamped on the Inside the upper end of the limit support ring, the buffer adjustment support plate is slidably clamped on the limit buffer fork cylinder, and the middle part of the buffer adjustment support plate is located at the upper end of the main buffer adjustment spring, the threaded connecting tube is fixedly connected to the upper end of the stroke buffer tube, the stroke buffer tube is slidably inserted into the inside of the limit buffer fork cylinder, the buffer adjustment adjustment arm is fixedly connected to the threaded connecting tube, the upper end of the buffer connecting arm is rotatably connected to the outer end of the buffer adjustment adjustment arm through a rotating connecting shaft, and the bottom end of the buffer connecting arm is rotatably connected to the outer end of the buffer adjustment support plate through a rotating connecting shaft.

[0008] Preferably, a pressure sensor is fixedly installed on the inner bottom end of the limit buffer fork cylinder, an auxiliary buffer adjustment spring is installed on the upper end of the pressure sensor, and the bottom end of the stroke buffer tube is located directly above the auxiliary buffer adjustment spring.

[0009] Preferably, both side ends of the fork arm are symmetrically fixedly installed with electric adjustment push rods, the upper end of the electric adjustment push rods is fixedly connected with a clamping mounting shell, and the end of the electric adjustment push rod is fixedly clamped with a hydraulic cylinder through the clamping mounting shell and bolts, and the front end of the hydraulic cylinder is fixedly connected with an oil delivery hose, and the middle part of the bottom end of the limit buffer fork cylinder in the first buffer protection device and the second buffer protection device is fixedly installed with an electric valve, and the end of the oil delivery hose away from the hydraulic cylinder is fixedly connected to the electric valve, and when the amount of the stroke buffer tube inserted into the limit buffer fork cylinder is too large, the bottom end of the stroke buffer tube will The buffer adjustment spring is fully squeezed, and the auxiliary buffer adjustment spring plays an auxiliary buffering role. At this time, the squeezing force of the auxiliary buffer adjustment spring on the pressure sensor increases. When the pressure sensor detects that the pressure value is greater than the specified pressure value, the pressure sensor transmits the detected information to the controller. At this time, the controller controls the operation of the hydraulic cylinder and the electric valve. The hydraulic cylinder quickly delivers the internal oil through the oil delivery hose from the electric valve to the limit buffer fork cylinder, and delivers a specified amount of hydraulic oil to the limit buffer fork cylinder to assist in rapid buffering and shock absorption, so that the device can automatically adjust the level of shock absorption and buffering according to different needs.

[0010] Preferably, a controller is fixedly mounted on the fixed mounting housing, and the pressure sensor is connected to the controller via a wireless signal.

[0011] Preferably, the upper end of the threaded connecting pipe is threadably inserted into the interior of the connecting end.

[0012] Preferably, the controller is electrically connected to the hydraulic cylinder and the electric valve via wires.

[0013] Preferably, the bottom of the buffer link arm is rotatably connected to an auxiliary support tray through a rotating connecting shaft, and a limiting threaded column is rotatably installed on the internal thread of the front end of the auxiliary support tray, and auxiliary springs are provided on the upper parts of both ends of the buffer adjustment support plate, and the upper end of the auxiliary spring is clamped inside the bottom end of the auxiliary support tray, and the limiting threaded column is inserted into the interior of the auxiliary spring, and the upper end of the limiting threaded column is fixedly connected to a rotating screwing handle, and the rotating screwing handle is located above the auxiliary support tray. By arranging a rotatable auxiliary support tray at the bottom of the buffer link arm, and installing an auxiliary spring between the bottom of the auxiliary support tray and the upper end of the buffer adjustment support plate through the limiting threaded column, the rotation and adjustment between the buffer link arm and the buffer adjustment support plate can be more stable and safe, and can also play an auxiliary buffering unloading role, so that the buffering and shock absorption effect of this equipment is better.

[0014] Beneficial effects of the present invention:

[0015] 1. The downward moving threaded connecting tube of the present invention will drive the buffer adjustment adjusting arm to move downward. At this time, the downward moving buffer adjustment adjusting arm will cause the buffer connecting rod arm to move downward, causing the buffer connecting rod arm to press the buffer adjustment supporting plate, thereby causing the buffer adjustment supporting plate to slide downward along the outside of the limit buffer fork cylinder, and the downward sliding buffer adjustment supporting plate will immediately squeeze the main buffer adjustment spring, and the main buffer adjustment spring will play a role in buffering and supporting shock absorption adjustment. In this process, the two ends of the buffer connecting rod arm can rotate inside the end of the buffer adjustment adjusting arm and the buffer adjustment supporting plate, so that the angle of the buffer connecting rod arm changes, so that the buffer adjustment adjusting arm, the buffer connecting arm and the buffer adjustment supporting plate can play a role in stabilizing and assisting the buffer shock absorption adjustment, making the buffering and shock absorption process safe and stable, and the shock absorption sufficient, which also makes the safety and service life of the equipment long during use.

[0016] 2. In the present invention, when the amount of the stroke buffer tube inserted into the limit buffer fork cylinder is too large, the bottom end of the stroke buffer tube will fully squeeze the auxiliary buffer adjustment spring. At this time, the auxiliary buffer adjustment spring plays an auxiliary buffering role, and the squeezing force of the auxiliary buffer adjustment spring on the pressure sensor increases. When the pressure sensor detects that the pressure value is greater than the specified pressure value, the pressure sensor transmits the detected information to the controller. At this time, the controller controls the operation of the hydraulic cylinder and the electric valve. The hydraulic cylinder quickly delivers the internal oil through the oil delivery hose from the electric valve to the limit buffer fork cylinder, and delivers a specified amount of hydraulic oil to the limit buffer fork cylinder to play an auxiliary and rapid buffering and shock absorption role, so that the device can automatically adjust the level of shock absorption and buffering according to different needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body from the front perspective in the present invention;

[0019] Figure 2 This is a schematic side view of the three-dimensional structure of the main body of the present invention;

[0020] Figure 3 This is a schematic diagram of the bottom structure of the connection adjustment device in the present invention;

[0021] Figure 4 Schematic diagram of the structure of the connection adjustment device in the present invention;

[0022] Figure 5 This is a schematic diagram of the bottom structure of the connection adjustment device in the present invention;

[0023] Figure 6 This is a schematic structural diagram of the first buffer protection device in the present invention;

[0024] Figure 7 This is a schematic diagram of the outer three-dimensional structure of the first buffer protection device in the present invention;

[0025] Figure 8 Schematic diagram of the internal structure of the limit buffer fork cylinder in the present invention;

[0026] Figure 9 This is a schematic structural diagram of the second embodiment of the main body of the present invention;

[0027] Figure 10 This is a schematic diagram of the bottom structure of the second embodiment of the main body of the present invention.

[0028] In the figure: 1-connecting adjustment device, 2-electric adjustment push rod, 3-hydraulic cylinder, 4-controller, 5-fixed mounting housing, 6-oil delivery hose, 7-first buffer protection device, 8-electric valve, 9-second buffer protection device, 10-upper support connecting pipe, 11-fork arm, 12-connecting end, 13-threaded connecting pipe, 14-buffer adjustment adjustment arm, 15-buffer connecting rod arm, 16-buffer adjustment support plate, 17-limiting buffer fork cylinder, 18-connecting fork foot, 19-limiting support ring, 20-main buffer adjustment spring, 21-stroke buffer tube, 22-rotating connecting shaft, 23-auxiliary buffer adjustment spring, 24-pressure sensor, 25-rotating screw handle, 26-auxiliary support tray, 27-limiting threaded column, 28-auxiliary spring. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Example 1, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, a linkage type suspension front fork structure of a bicycle of the present invention includes a connecting adjustment device 1, a first buffer protection device 7 and a second buffer protection device 9. The first buffer protection device 7 and the second buffer protection device 9 are arranged at the bottom end of the connecting adjustment device 1, and the first buffer protection device 7 and the second buffer protection device 9 have the same structure. The connecting adjustment device 1 includes an upper support connecting tube 10, a fork arm 11 and a connecting end 12. The connecting end 12 is fixedly connected to the bottom of both ends of the fork arm 11. The upper support connecting tube 10 is fixedly installed on the middle upper end of the fork arm 11 by bolts. The threaded connecting tube 13 can be conveniently disassembled and replaced through the connecting end 12.

[0033] like Figure 6 and Figure 7As shown, the first buffer protection device 7 and the second buffer protection device 9 both include a threaded connecting tube 13, a buffer adjustment adjustment arm 14, a buffer connecting rod arm 15, a buffer adjustment support plate 16, a limit buffer fork cylinder 17, a connecting fork foot 18, a limit support ring 19, a main buffer adjustment spring 20, a stroke buffer tube 21 and a rotating connecting shaft 22, the connecting fork foot 18 is fixedly connected to the inner side of the bottom end of the limit buffer fork cylinder 17, the limit support ring 19 is fixedly connected to the bottom of the limit buffer fork cylinder 17, the main buffer adjustment spring 20 is arranged on the limit support ring 19, and the limit buffer fork cylinder 17 is located inside the main buffer adjustment spring 20, the main The bottom end of the buffer adjustment spring 20 is clamped inside the upper end of the limit support ring 19, the buffer adjustment support plate 16 is slidably clamped on the limit buffer fork cylinder 17, and the middle part of the buffer adjustment support plate 16 is located at the upper end of the main buffer adjustment spring 20, the threaded connecting tube 13 is fixedly connected to the upper end of the stroke buffer tube 21, the stroke buffer tube 21 is slidably inserted into the interior of the limit buffer fork cylinder 17, the buffer adjustment adjustment arm 14 is fixedly connected to the threaded connecting tube 13, the upper end of the buffer connecting rod arm 15 is rotatably connected to the outer end of the buffer adjustment adjustment arm 14 by rotating the connecting shaft 22, and the bottom end of the buffer connecting rod arm 15 is rotatably connected to the outer end of the buffer adjustment adjustment arm 14 by rotating the connecting shaft 22 The stroke buffer tube 21 is connected to the inner part of the outer end of the buffer adjustment support plate 16, and can be stably inserted and slid inside the limit buffer fork cylinder 17, and when the stroke buffer tube 21 slides and inserts into the inner part of the limit buffer fork cylinder 17, it will drive the threaded connection tube 13 to move downward synchronously, and the downward moving threaded connection tube 13 will drive the buffer adjustment adjustment arm 14 to move downward. At this time, the downward moving buffer adjustment adjustment arm 14 will cause the buffer connecting rod arm 15 to move downward, so that the buffer connecting rod arm 15 presses the buffer adjustment support plate 16, thereby causing the buffer adjustment support plate 16 to slide downward along the outer part of the limit buffer fork cylinder 17 and downward. The sliding buffer adjustment support plate 16 will then squeeze the main buffer adjustment spring 20, which will play a role in buffering and supporting shock absorption adjustment. In this process, the two ends of the buffer link arm 15 can rotate inside the end of the buffer adjustment arm 14 and the buffer adjustment support plate 16, so that the angle of the buffer link arm 15 changes, so that the buffer adjustment arm 14, the buffer link arm 15 and the buffer adjustment support plate 16 can play a role in stabilizing and assisting the buffer shock absorption adjustment, making the buffering and shock absorption process safe and stable, and the shock absorption is sufficient, which also makes the safety and service life of the equipment long during use.

[0034] like Figure 8 As shown, a pressure sensor 24 is fixedly installed at the inner bottom end of the limit buffer fork cylinder 17, an auxiliary buffer adjustment spring 23 is installed at the upper end of the pressure sensor 24, and the bottom end of the stroke buffer tube 21 is located directly above the auxiliary buffer adjustment spring 23. The degree of bumps can be detected by the pressure sensor 24.

[0035] Electric adjustment push rods 2 are symmetrically fixedly installed on both side ends of the fork arm 11, and the upper end of the electric adjustment push rod 2 is fixedly connected with a fixing mounting shell 5. The end of the electric adjustment push rod 2 is fixedly fixed with a hydraulic cylinder 3 through the fixing mounting shell 5 and bolts. The symmetrically distributed fixing mounting shells 5 are fixedly connected and fixed with the hydraulic cylinder 3 by bolts, which facilitates the disassembly and installation of the hydraulic cylinder 3. The front end of the hydraulic cylinder 3 is fixedly connected with an oil delivery hose 6.

[0036] An electric valve 8 is fixedly installed at the middle of the bottom end of the limiting buffer fork cylinder 17 in the first buffer protection device 7 and the second buffer protection device 9, and the end of the oil delivery hose 6 away from the hydraulic cylinder 3 is fixedly connected to the electric valve 8 to deliver the oil.

[0037] The controller 4 is fixedly mounted on the fixed mounting housing 5 , and the pressure sensor 24 is connected to the controller 4 via wireless signals, thereby realizing automatic control.

[0038] The upper end of the threaded connecting pipe 13 is threadedly inserted into the interior of the connecting end 12, which is convenient for disassembly and fixed installation.

[0039] The controller 4 is electrically connected to the hydraulic cylinder 3 and the electric valve 8 through wires, and can achieve customized detection and control.

[0040] The working principle of Example 1 is as follows: during use, the device can be connected and installed at the corresponding position of the bicycle body through the upper support connecting tube 10 and the connecting fork foot 18. During use, the stroke buffer tube 21 can be stably inserted and slid inside the limit buffer fork cylinder 17, and when the stroke buffer tube 21 slides and inserts into the inside of the limit buffer fork cylinder 17, it will drive the threaded connecting tube 13 to move downward synchronously, and the downward moving threaded connecting tube 13 will drive the buffer adjustment adjustment arm 14 to move downward. At this time, the downward moving buffer adjustment adjustment arm 14 will cause the buffer connecting rod arm 15 to move downward, so that the buffer connecting rod arm 15 presses the buffer adjustment support plate 16, thereby making the buffer adjustment support plate 16 slides downward along the outside of the limit buffer fork cylinder 17, and the downward sliding buffer adjustment support plate 16 will then squeeze the main buffer adjustment spring 20, which plays a role in buffering and supporting shock absorption adjustment. In this process, the two ends of the buffer link arm 15 can rotate inside the end of the buffer adjustment adjustment arm 14 and the buffer adjustment support plate 16, so that the angle of the buffer link arm 15 changes, so that the buffer adjustment adjustment arm 14, the buffer link arm 15 and the buffer adjustment support plate 16 can play a role in stabilizing and assisting the buffer shock absorption adjustment, making the buffering and shock absorption process safe and stable, and the shock absorption sufficient, which also makes the safety and service life of the device long during use;

[0041] And when the amount of the stroke buffer tube 21 inserted into the limit buffer fork cylinder 17 is too large, the bottom end of the stroke buffer tube 21 will fully squeeze the auxiliary buffer adjustment spring 23. At this time, the auxiliary buffer adjustment spring 23 plays an auxiliary buffering role, and the squeezing force of the auxiliary buffer adjustment spring 23 on the pressure sensor 24 increases. When the pressure sensor 24 detects that the pressure value is greater than the specified pressure value, the pressure sensor 24 transmits the detected information to the controller 4. At this time, the controller 4 controls the operation of the hydraulic cylinder 3 and the electric valve 8. The hydraulic cylinder 3 quickly delivers the internal oil through the oil delivery hose 6 from the electric valve 8 to the limit buffer fork cylinder 17, and delivers a specified amount of hydraulic oil to the limit buffer fork cylinder 17 to assist in rapid buffering and shock absorption, so that the device can automatically adjust the level of shock absorption and buffering according to different needs. When the squeezing force value detected by the pressure sensor 24 is within the specified range, the oil flows into the hydraulic cylinder 3, and the electric valve 8 is closed.

[0042] Example 2, based on Example 1, Figure 9 and Figure 10 As shown, the bottom of the buffer link arm 15 is rotatably connected to the auxiliary support tray 26 through the rotating connecting shaft 22, and the front end internal thread of the auxiliary support tray 26 is rotatably installed with a limiting threaded column 27. Auxiliary springs 28 are provided on the upper part of both ends of the buffer adjustment support plate 16, and the upper end of the auxiliary spring 28 is clamped inside the bottom end of the auxiliary support tray 26. The limiting threaded column 27 is inserted into the interior of the auxiliary spring 28, and the upper end of the limiting threaded column 27 is fixedly connected to the rotating screwing handle 25, and the rotating screwing handle 25 is located above the auxiliary support tray 26.

[0043] When implementing this embodiment, a rotating auxiliary support tray 26 is set at the bottom of the buffer link arm 15, and an auxiliary spring 28 is installed between the bottom of the auxiliary support tray 26 and the upper end of the buffer adjustment support plate 16 through a limiting threaded column 27, so that the rotation adjustment between the buffer link arm 15 and the buffer adjustment support plate 16 can be more stable and safe, and can also play an auxiliary buffering and unloading role, so that the buffering and shock absorption effect of this equipment is better.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A connecting rod type suspension front fork structure for a bicycle, comprising a connecting adjustment device (1), a first buffer protection device (7) and a second buffer protection device (9), characterized in that: The first buffer protection device (7) and the second buffer protection device (9) are arranged at the bottom end of the connection adjustment device (1), and the first buffer protection device (7) and the second buffer protection device (9) have the same structure. The connection adjustment device (1) comprises an upper support connecting pipe (10), a fork arm (11) and a connecting end (12). The connecting end (12) is fixedly connected to the bottom of both ends of the fork arm (11), and the upper support connecting pipe (10) is fixedly installed at the middle upper end of the fork arm (11) by bolts. The first buffer protection device (7) and the second buffer protection device (9) both include a threaded connection tube (13), a buffer adjustment arm (14), a buffer connecting rod arm (15), a buffer adjustment support plate (16), a limit buffer fork cylinder (17), a connecting fork leg (18), a limit support ring (19), a main buffer adjustment spring (20), a stroke buffer tube (21) and a rotating connecting shaft (22), wherein the connecting fork leg (18) is fixedly connected to the inner side of the bottom end of the limit buffer fork cylinder (17), the limit support ring (19) is fixedly connected to the bottom of the limit buffer fork cylinder (17), the main buffer adjustment spring (20) is arranged on the limit support ring (19), and the limit buffer fork cylinder (17) is located inside the main buffer adjustment spring (20), and the bottom of the main buffer adjustment spring (20) is fixedly connected to the bottom of the limit buffer fork cylinder (17). The end is clamped inside the upper end of the limit support ring (19), the buffer adjustment support plate (16) is slidably clamped on the limit buffer fork cylinder (17), and the middle part of the buffer adjustment support plate (16) is located at the upper end of the main buffer adjustment spring (20), the threaded connecting tube (13) is fixedly connected to the upper end of the stroke buffer tube (21), the stroke buffer tube (21) is slidably inserted into the interior of the limit buffer fork cylinder (17), the buffer adjustment adjustment arm (14) is fixedly connected to the threaded connecting tube (13), the upper end of the buffer connecting rod arm (15) is rotatably connected to the outer end of the buffer adjustment adjustment arm (14) through the rotating connecting shaft (22), and the bottom end of the buffer connecting rod arm (15) is rotatably connected to the outer end of the buffer adjustment support plate (16) through the rotating connecting shaft (22); A pressure sensor (24) is fixedly mounted on the inner bottom end of the limit buffer fork cylinder (17), an auxiliary buffer adjustment spring (23) is mounted on the upper end of the pressure sensor (24), and the bottom end of the stroke buffer tube (21) is located directly above the auxiliary buffer adjustment spring (23); Electric adjustment push rods (2) are symmetrically fixedly installed on both side ends of the fork arm (11), and the upper end of the electric adjustment push rod (2) is fixedly connected to a clamping mounting housing (5). The end of the electric adjustment push rod (2) is fixedly clamped with a hydraulic cylinder (3) through the clamping mounting housing (5) and bolts, and the front end of the hydraulic cylinder (3) is fixedly connected to an oil delivery hose (6).

2. The link-type suspension front fork structure for a bicycle according to claim 1, characterized in that: An electric valve (8) is fixedly installed at the middle of the bottom end of the limit buffer fork cylinder (17) in the first buffer protection device (7) and the second buffer protection device (9), and the end of the oil delivery hose (6) away from the hydraulic cylinder (3) is fixedly connected to the electric valve (8).

3. The connecting rod type suspension front fork structure of a bicycle according to claim 2, characterized in that: A controller (4) is fixedly mounted on the fixed mounting housing (5), and the pressure sensor (24) is connected to the controller (4) via wireless signals.

4. The link-type suspension front fork structure for a bicycle according to claim 3, characterized in that: The upper end of the threaded connecting pipe (13) is threadably inserted into the interior of the connecting end (12).

5. The link-type suspension front fork structure for a bicycle according to claim 4, characterized in that: The controller (4) is electrically connected to the hydraulic cylinder (3) and the electric valve (8) via a wire.

6. The link-type suspension front fork structure for a bicycle according to claim 5, characterized in that: The bottom of the buffer link arm (15) is rotatably connected to an auxiliary support tray (26) via a rotating connecting shaft (22); a limiting threaded column (27) is rotatably installed on the front end internal thread of the auxiliary support tray (26); auxiliary springs (28) are provided on the upper parts of both ends of the buffer adjustment support plate (16); the upper end of the auxiliary spring (28) is fixed inside the bottom end of the auxiliary support tray (26), and the limiting threaded column (27) is inserted into the interior of the auxiliary spring (28).

7. The link-type suspension front fork structure for a bicycle according to claim 6, characterized in that: The upper end of the limiting threaded column (27) is fixedly connected to a rotating screw handle (25), and the rotating screw handle (25) is located above the auxiliary support tray (26).

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