Two-wheeled front fork structure

Abstract

A two-wheeled front fork structure includes a front fork tube, two swing arms, a rocker arm, a balance arm, two connecting rods, a shock absorber and two wheels. The front fork tube has a lower tube; the two swing arms are respectively connected to the left and right sides of the front end of the lower tube and each has a rod portion; the bottom of the rocker arm is pivotally connected to the lower tube and can swing forward and backward, and the top of the rocker arm and the lower tube are pivotally connected to the shock absorber; the balance arm is pivotally connected to the front of the rocker arm and can swing left and right; the two connecting rods are respectively arranged on the left and right sides of the front fork tube and each has one end pivotally connected to the left and right ends of the balance arm and the other end pivotally connected to each rod portion; each wheel is connected to the rear of each rod portion. Thus, when each wheel rises and falls, each connecting rod and the balance arm can be connected and moved, the balance arm is moved upward, and the rocker arm is swung backward to compress the shock absorber, achieving the effect of shock absorption through a single shock absorber.

Description

Technical Field

[0001] This utility model relates to a bicycle front fork; in particular, it refers to a two-wheeled front fork structure. Background Technology

[0002] The known three-wheeled bicycle has a structure of two wheels in the front and one wheel in the back. The front wheel is used for steering, turning, and shock absorption. Compared with the old-style three-wheeled bicycle with one wheel in the front and two wheels in the back, it can provide better riding stability. It can improve the situation of the old-style three-wheeled bicycle with one wheel in the front and two wheels in the back, which requires a larger turning radius and is prone to overturning when turning due to excessive turning angle or speed. In addition, the structure of two wheels in the front can still maintain stability and retain some control by using the other wheel when one wheel temporarily loses traction due to poor road conditions. This can effectively reduce the probability of losing control of the vehicle, thereby improving the overall riding safety and stability.

[0003] However, tricycles with two front wheels and one rear wheel use a dual shock absorber system. The complex parts increase the weight of the vehicle, making it more difficult for riders to handle and carry. Therefore, how to provide a two-wheeled front fork structure with a single shock absorber system is an area that related companies can further improve. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a two-wheeled front fork structure that uses a single shock absorber system to reduce the weight of the vehicle body.

[0005] To achieve the above objectives, this utility model provides a two-wheeled front fork structure, including a fork tube, two swing arms, a rocker arm, a balance arm, two connecting rods, a shock absorber, and two wheels. The fork tube comprises an upper tube and a lower tube connected sequentially. The lower tube has a shock absorber rear pivot, a lower tube pivot, and a front pivot. The lower tube pivot is located below and in front of the shock absorber rear pivot, and the front pivot is located below and in front of the lower tube pivot. The two swing arms are respectively located on the left and right sides of the fork tube. Each swing arm has a rod portion, with a swing arm pivot at the front end of each rod portion, a wheel axle seat at the rear end of each rod portion, and a connecting rod pivot in the middle of each rod portion. The two swing arms are rotatably pivotally connected to the left and right sides of the front pivot via the swing arm pivots. The rocker arms... The bottom is pivotally connected to the lower tube pivot seat and can swing back and forth; the top of the rocker arm has a shock absorber front pivot seat; the middle of the balance arm has a balance arm pivot seat, which is rotatably pivotally connected to the front of the rocker arm and can swing left and right; the two connecting rods are respectively located on the left and right sides of the front fork tube, each connecting rod is rotatably pivotally connected at one end to the left and right ends of the balance arm, and each connecting rod is rotatably pivotally connected at the other end to the connecting rod pivot seat of each of the rocker arms; the two ends of the shock absorber are respectively pivotally connected to the shock absorber rear pivot seat and the shock absorber front pivot seat; each wheel has an axle at its center, and each axle pivotally passes through each axle seat.

[0006] The advantage of this invention is that, through the pivot joint of each swing arm rotatably connected to the left and right sides of the front pivot joint, and the wheel axle seat of each swing arm connected to the wheel, when each wheel moves up and down with the undulation of the ground, each swing arm can swing up and down with the up and down movement of each wheel; during the upward swing of any swing arm, the balance arm can be linked through the corresponding connecting rod, causing the balance arm to move upward, thereby pushing the rocker arm to swing backward and compress the shock absorber, so that when any wheel moves with the undulation of the ground, the shock absorber can achieve the effect of shock absorption. Since only one shock absorber is used to provide the shock absorption effect of two wheels, the number of parts used can be reduced, thereby reducing the weight of the vehicle and making it more flexible and effortless for the rider to operate and carry. In addition, when turning, the balance arm can be linked by the two linkages to swing the two swing arms located on the left and right sides of the front fork tube in opposite directions, so that the wheels on the left and right sides can swing in the same direction to adapt to the tilt of the vehicle body, thus keeping close to the ground and maintaining grip. Attached Figure Description

[0007] Figure 1This is a perspective view of a preferred embodiment of the two-wheeled front fork structure of this utility model.

[0008] Figure 2 for Figure 1 An exploded view of the two-wheeled front fork structure shown.

[0009] Figure 3 for Figure 2 An exploded view of some components of the two-wheeled front fork structure shown.

[0010] Figure 4 This is a top view of a preferred embodiment of the two-wheeled front fork structure of this utility model.

[0011] Figure 5 for Figure 4 Sectional view in direction 5-5.

[0012] Figure 6 for Figure 4 A 6-6 sectional view before the shock absorber is activated.

[0013] Figure 7 for Figure 6 A schematic diagram of the shock absorber under compression.

[0014] Figure 8 This is a schematic diagram of the usage state of the preferred embodiment of the present invention.

[0015] Explanation of reference numerals in the attached figures

[0016] 100: Two-wheeled front fork structure

[0017] 10: Front fork tube

[0018] 11: Top tube

[0019] 12: Lower pipe

[0020] 13: Reinforcing pipe

[0021] 14: Shock absorber rear pivot seat

[0022] 141: Shock absorber rear pivot lug

[0023] 142: Perforation of the lug on the rear pivot seat of the shock absorber

[0024] 15: Rear pivot

[0025] 16: Lower pipe pivot connector

[0026] 161: Lower tube pivot lug

[0027] 162: Lower tube pivot joint lug perforation

[0028] 17: Lower pivot

[0029] 18: Anterior pivot joint

[0030] 181: Front axle bore

[0031] 19: First Pivot

[0032] 20: Swing arm

[0033] 22: Pole section

[0034] 24: Swing arm pivot seat

[0035] 241: Swing arm shaft hole

[0036] 26: Wheel and axle seat

[0037] 261: Axle hole

[0038] 28: Linkage pivot seat

[0039] 281: Connecting rod pivot bolt hole

[0040] 30: Rocker arm

[0041] 32: Rocker arm pivot hole

[0042] 34: Front pivot joint of shock absorber

[0043] 341: Shock absorber front pivot lug

[0044] 342: Perforation of the lug on the front pivot of the shock absorber

[0045] 39: Front pivot

[0046] 36: Rocker arm screw hole

[0047] 38: Limiting protrusion

[0048] 40: Balance arm

[0049] 42: Balance arm pivot seat

[0050] 421: Bearing groove

[0051] 4211: Bearing groove perforation

[0052] 43: Bearing

[0053] 44: Limiting groove

[0054] 46: Balance arm screw hole

[0055] 48: Pivot screw

[0056] 481: Head

[0057] 482: Shaft

[0058] 483: Screw

[0059] 49: Gasket

[0060] 50: Linkage

[0061] 51: Screw

[0062] 511: Operating components

[0063] 52: First nut

[0064] 53: Second nut

[0065] 54: First connecting rod head

[0066] 541: First connecting rod head screw hole

[0067] 542: First connecting rod head pivot seat

[0068] 55: First spherical pivot joint

[0069] 551: Perforation of the first spherical pivot joint

[0070] 56: Second link head

[0071] 561: Second connecting rod head screw hole

[0072] 562: Second connecting rod head pivot seat

[0073] 57: Second spherical pivot joint

[0074] 571: Second spherical pivot joint perforation

[0075] 58: First screw

[0076] 581: First Head

[0077] 582: First shaft

[0078] 583: First screw

[0079] 59: Second screw

[0080] 591: Second Head

[0081] 592: Second shaft

[0082] 593: Second screw

[0083] 60: Shock absorber

[0084] 62: Front pivot hole of shock absorber

[0085] 64: Shock absorber rear pivot hole

[0086] 70: Wheel Module

[0087] 71: Wheel and Axle

[0088] 73: Stent

[0089] 75: Disc

[0090] 77: Wheel

[0091] 78: Calipers

[0092] 79: Fasteners Detailed Implementation

[0093] To more clearly illustrate this utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figures 1 to 2 As shown, a preferred embodiment of the present invention is a two-wheeled front fork structure 100, which includes a fork tube 10, two swing arms 20, a rocker arm 30, a balance arm 40, two connecting rods 50, a shock absorber 60, and two wheel modules 70. The following description of the two-wheeled front fork structure 100 will be based on the state of the two-wheeled front fork structure 100 in use, and will describe the front-back and up-down directions between the various parts of the two-wheeled front fork structure 100.

[0094] like Figure 2 and Figure 3 As shown, the fork tube 10 includes an upper tube 11, a lower tube 12, and a reinforcing tube 13. The upper tube 11 is a vertically arranged tube, and its upper end is connected to a faucet (not shown). The upper tube 11 and the lower tube 12 are connected vertically in sequence. The lower tube 12 is a curved tube extending downward and forward from the upper tube 11. The lower tube 12 has a shock absorber rear pivot 14, a lower tube pivot 16, and a front pivot 18. The rear pivot seat 14 of the shock absorber has a pair of rear pivot seat lugs 141, each of which has a rear pivot seat lug through hole 142. The lower tube pivot seat 16 is located on the lower side in front of the rear pivot seat 14 of the shock absorber. The lower tube pivot seat 16 has a pair of lower tube pivot seat lugs 161, each of which has a lower tube pivot seat lug through hole 162. The front pivot seat 18 is connected to the lower end of the lower tube 12 and is located on the lower side in front of the lower tube pivot seat 16. The front pivot seat 18 has a front axle hole 181. The reinforcing tube 13 is a curved tube extending forward and downward. One end of the reinforcing tube 13 is connected to the upper tube 11, and the other end of the reinforcing tube 13 is connected to the front pivot seat 18.

[0095] like Figure 2As shown, the two swing arms 20 are respectively disposed on the left and right sides of the front fork tube 10 and each has a rod portion 22. A swing arm pivot seat 24 is connected to the front end of each rod portion 22. Each swing arm pivot seat 24 has a swing arm shaft hole 241, and each swing arm shaft hole 241 is directly opposite the front axle hole 181 in the left-right direction. A wheel axle seat 26 is connected to the rear end of each rod portion 22. Each wheel axle seat has a wheel axle hole 261. A connecting rod pivot seat 28 is disposed in the middle of each rod portion 22. Each connecting rod pivot seat 28 has a connecting rod pivot screw hole 281. The fork tube 10 is provided with a first pivot 19 for the swing arm shaft hole 241 and the front axle hole 181 of each swing arm 20. The center of the first pivot 19 passes through the front axle hole 181, and the left and right sides of the first pivot 19 pass through the swing arm shaft hole 241 respectively. Thus, the two swing arms 20 are connected to the left and right sides of the front pivot seat 18 of the fork tube 10 in a way that allows them to swing up and down through the swing arm pivot seats 24 respectively.

[0096] like Figure 3 As shown, the bottom of the rocker arm 30 has a rocker arm pivot hole 32. The rocker arm pivot hole 32 is located between each pair of lower tube pivot lugs 161 and directly opposite each lower tube pivot lug through hole 162. A lower pivot shaft 17 is pivotally passed through the rocker arm pivot hole 32. The two ends of the lower pivot shaft 17 are respectively fixed by passing through each lower tube pivot lug through hole 162, thereby allowing the rocker arm 30 to swing back and forth. The top of the rocker arm 30 has a shock absorber front pivot seat 34. The shock absorber front pivot seat 34 has a pair of shock absorber front pivot lugs 341, and each pair of shock absorber front pivot lugs 341 has a shock absorber front pivot lug through hole 342. The rocker arm 30 has a rocker arm screw hole 36 and a limiting protrusion 38 on its front. The rocker arm screw hole 36 is located below the limiting protrusion 38, and the limiting protrusion 38 is a forward-protruding cylinder.

[0097] like Figure 3 As shown, the balance arm 40 is a plate body that is symmetrical from left to right and forms a balance arm pivot seat 42 in the middle. The balance arm pivot seat 42 has a bearing groove 421 and a bearing groove through hole 4211 is formed in the middle of the bearing groove 421. A bearing 43 is embedded in the bearing groove 421. A limiting groove 44 is formed on the part of the balance arm 40 above the balance arm pivot seat 42. A balance arm screw hole 46 is formed at the left and right ends of the balance arm 40 respectively.

[0098] A pivot screw 48 is provided to cooperate with the bearing 43. The pivot screw 48 has a head 481, a shaft 482, and a screw 483 that are concentrically connected in sequence. The width of the head 481 is greater than that of the shaft 482, and the outer surface of the shaft 482 is smooth. The width of the shaft 482 is greater than that of the screw 483. A washer 49 is provided in front of the bearing 43. The shaft 482 pivotally passes through the washer 49, the bearing 43, and the bearing groove through hole 4211 in sequence. The screw 483 is screwed into the rocker arm screw hole 36 of the rocker arm 30. Thus, the balance arm 40 can swing left and right relative to the rocker arm 30.

[0099] The limiting groove 44 is an arc-shaped hole with the center line of the shaft screw 48 as the center. The limiting protrusion 38 passes through the limiting groove 44 to limit the amplitude of the swing of the balance arm 40 in the left and right directions with the center line of the shaft screw 48 as the rotation center.

[0100] like Figure 2 and Figure 5 As shown, the two connecting rods 50 are respectively disposed on the left and right sides of the front fork tube 10. Each connecting rod 50 has a screw 51, a first nut 52, a second nut 53, a first connecting rod head 54, and a second connecting rod head 56. Each screw 51 has an operating member 511 in the middle. Each operating member 511 is a polygonal prism, and each screw 51 has a left-hand thread and a right-hand thread on the upper and lower sides of the operating member 511, respectively. Each first nut 52 is screwed into the screw 51 on the upper side of each operating member 511; each second nut 53 is screwed into the screw 51 on the lower side of each operating member 511.

[0101] Each first connecting rod head 54 has a first connecting rod head screw hole 541 and a first connecting rod head pivot seat 542. Each first connecting rod head screw hole 541 is screwed into the upper end of each screw rod 51, and each first nut 52 abuts against the side of each first connecting rod head 54 with the first connecting rod head screw hole 541. Each second connecting rod head 56 has a second connecting rod head screw hole 561 and a second connecting rod head pivot seat 562. Each second connecting rod head screw hole 561 is screwed into the lower end of each screw rod 51, and each second nut 53 abuts against the side of each second connecting rod head 56 with the second connecting rod head screw hole 561. Each first nut 52 and each second nut 53 provides a tight clamping effect. Therefore, when encountering uneven road surfaces and vibrations during riding, each first connecting rod head 54 and each second connecting rod head 56 will not rotate relative to each screw rod 51, thereby achieving the purpose of fixing the length of each connecting rod 50.

[0102] Each of the first connecting rod head pivot seats 542 has an inner circumferential surface that is partially spherical in an annular shape. A first spherical pivot member 55 is embedded in each of the first connecting rod head pivot seats 542, and a first spherical pivot member through hole 551 is formed in the middle of each of the first spherical pivot member 55. A first screw 58 is pivotally inserted through each of the first spherical pivot member through holes 551. Each of the first screws 58 has a first head 581, a first shaft 582, and a first threaded rod 583 that are concentric and sequentially connected. The width of each first head 581 is greater than that of each first shaft 582, and the width of each first shaft 582 is greater than that of each first threaded rod 583. Each first shaft 582 is pivotally inserted through each of the first spherical pivot member through holes 551, and each first threaded rod 583 is screwed into each of the balance arm screw holes 46 of the balance arm 40.

[0103] Each second connecting rod head pivot seat 562 has an inner circumferential surface that is partially spherical in an annular shape. A second spherical pivot member 57 is embedded in each second connecting rod head pivot seat 562, and a second spherical pivot member through hole 571 is formed in the middle of each second spherical pivot member 57. A second screw 59 is pivotally inserted through each second spherical pivot member through hole 571. Each second screw 59 has a second head 591, a second shaft 592, and a second threaded rod 593 that are concentric and sequentially connected. The width of each second head 591 is greater than that of each second shaft 592, and the width of each second shaft 592 is greater than that of each second threaded rod 593. Each second shaft 592 pivotally inserts into each second spherical pivot member through hole 571, and each second threaded rod 593 is screwed into the connecting rod pivot seat 28 on the left and the connecting rod pivot seat 28 on the right, respectively.

[0104] When a user wishes to change the length of each of the connecting rods 50, they can use an Allen wrench (not shown) to loosen the first nut 52 and the second nut 53 of each connecting rod 50, and rotate the operating member 511 of each screw 51. This changes the depth at which the two ends of the screw 51 of each connecting rod 50 are screwed into the first connecting rod head screw hole 541 and the second connecting rod head screw hole 561, thereby changing the length of each connecting rod 50 to adapt to different usage needs. Specifically, when driving at high speed, the length of each connecting rod 50 can be adjusted to a longer state to improve stability; when agile steering is required, the length of each connecting rod 50 can be adjusted to a shorter state to enhance handling.

[0105] like Figure 3As shown, the shock absorber 60 has a front pivot hole 62 and a rear pivot hole 64 at each end. The front pivot hole 62 is located between each pair of front pivot lugs 341 and directly opposite the through holes 342 of each front pivot lug. A front pivot 39 is pivotally inserted through the front pivot hole 62, and both ends of the front pivot 39 are fixed through the through holes 342 of each front pivot lug. The rear pivot hole 64 is located between each pair of rear pivot lugs 141 and directly opposite the through holes 142 of each rear pivot lug. A rear pivot 15 is pivotally inserted through the rear pivot hole 64, and both ends of the rear pivot 15 are fixed through the through holes 142 of each rear pivot lug. Thus, as... Figure 6 As shown, when the rocker arm 30 is not swinging backward, the shock absorber 60 is in an uncompressed state; Figure 7 As shown, when the rocker arm 30 swings backward, the shock absorber 60 is in a compressed state.

[0106] like Figure 2 As shown, the two wheel modules 70 are respectively disposed on the left and right sides of the front fork tube 10. Each wheel module 70 has an axle 71, a bracket 73, a disc 75, a wheel 77, and a caliper 78. Each axle 71 is pivotally inserted into the axle hole 261 of each axle seat 26. Each bracket 73 is sleeved on the outer peripheral surface of each axle seat 26. Each disc 75 is integrally connected to the hub of each wheel 77 and is disposed on each axle 71. Each wheel 77 is rotatably disposed on each axle 71, thereby supporting the vehicle and allowing it to move. Each caliper 78 is fixed to each bracket 73 by two fasteners 79. Figure 6 (Refer to), and each of the calipers 78 clamps one side of each of the discs 75 ( Figure 1 (See reference), thus when braking, braking force is generated to help the vehicle slow down or stop.

[0107] In summary, the advantage of this invention lies in the fact that the swing arm pivot seats 24 of each swing arm 20 are connected to the left and right sides of the front pivot seat 18 in a swingable manner, and the wheel axle seats 26 of each swing arm 20 are connected to the wheels 77. Therefore, when each wheel 77 moves up and down with the undulations of the ground, each swing arm 20 can swing up and down with the up and down movement of each wheel 77. During the upward swing of any swing arm 20, the corresponding connecting rod 50 can be used to activate the balance arm 40, causing the balance arm 40 to move upward, thereby pushing the rocker arm 30 to swing backward and compress the shock absorber 60. This achieves the effect of shock absorption by the shock absorber 60 when any wheel 77 moves with the undulations of the ground. Since only one shock absorber is used to provide the shock absorption effect for two wheels, the number of parts used is reduced, achieving the goal of reducing the weight of the vehicle and making it more flexible and effortless for the rider to operate and transport. In addition, as... Figure 8 As shown, when turning, the balance arm 40 can be linked by the two connecting rods to swing the two swing arms located on the left and right sides of the front fork tube in opposite directions, so that the wheels on the left and right sides can swing in the same direction to adapt to the tilt direction of the vehicle body, thus keeping close to the ground and maintaining grip.

[0108] The above description is only a preferred and feasible embodiment of this utility model. Any equivalent changes made by applying the specification and claims of this utility model should be included within the patent scope of this utility model.

Claims

1. A two-wheeled front fork structure, characterized in that, Include: A fork tube includes an upper tube and a lower tube connected in sequence. The lower tube has a shock absorber rear pivot, a lower tube pivot and a front pivot. The lower tube pivot is located on the lower side in front of the shock absorber rear pivot, and the front pivot is located on the lower side in front of the lower tube pivot. Two swing arms are respectively located on the left and right sides of the front fork tube. Each swing arm has a rod portion, with a swing arm pivot seat at the front end of each rod portion, a wheel axle seat at the rear end of each rod portion, and a connecting rod pivot seat in the middle of each rod portion. The two swing arms are rotatably pivotally connected to the left and right sides of the front pivot seat via the swing arm pivot seats. A rocker arm, the bottom of which is pivotally connected to the lower tube pivot seat and can swing back and forth, and the top of which has a shock absorber front pivot seat; A balance arm with a balance arm pivot seat in the middle, the balance arm pivot seat being rotatably pivoted to the front of the rocker arm and able to swing left and right; Two connecting rods are respectively located on the left and right sides of the front fork tube. Each of the two connecting rods is rotatably pivotally connected at one end to the left and right ends of the balance arm, and at the other end of each of the two connecting rods is rotatably pivotally connected to the connecting rod pivot seat of each swing arm. A shock absorber, wherein both ends of the shock absorber are pivotally connected to a rear pivot seat and a front pivot seat, respectively; and Two wheels, each wheel having an axle at its center, each axle pivotally connected to its axle seat.

2. The two-wheeled front fork structure as described in claim 1, wherein, The rocker arm has a rocker arm screw hole at the front, the balance arm pivot seat has a bearing groove and a bearing groove through hole is formed in the middle of the bearing groove, a bearing is embedded in the bearing groove, and a shaft screw is inserted through the center of the bearing. The shaft screw passes through the bearing groove through hole and is screwed into the rocker arm screw hole.

3. The two-wheeled front fork structure as described in claim 2, wherein, The axial screw has a head, a shaft and a screw that are concentric and connected in sequence. The width of the head is greater than that of the shaft, and the width of the shaft is greater than that of the screw. The shaft passes through the bearing and the bearing groove through hole in sequence, and the screw is screwed into the rocker arm screw hole.

4. The two-wheeled front fork structure as described in claim 2, wherein, The front of the balance arm has a limiting groove, which is an arc-shaped hole with the center line of the shaft screw as the center. The front of the rocker arm has a limiting protrusion, which passes through the limiting groove.

5. The two-wheeled front fork structure as described in claim 1, wherein, The left and right ends of the balance arm each form a balance arm screw hole; each connecting rod pivot seat has a connecting rod pivot screw hole; each of the two connecting rods has a first connecting rod head, a second connecting rod head, and a screw rod, each first connecting rod head has a first connecting rod head screw hole and a first connecting rod head pivot seat, and each first connecting rod head screw hole is screwed into one end of each screw rod; each second connecting rod head has a second connecting rod head screw hole and a second connecting rod head pivot seat, and each second connecting rod head screw hole is screwed into the other end of each screw rod; a first nut and a second nut are screwed into each screw rod, and each first nut abuts against the side of each first connecting rod head with the first connecting rod head screw hole. The second nut abuts against the side of each second connecting rod head having the second connecting rod head screw hole; a first spherical pivot is embedded in each first connecting rod head pivot seat, a first spherical pivot hole is formed in the middle of each first spherical pivot, a first screw is pivotally inserted through each first spherical pivot hole, and each first screw is screwed into the screw hole of each balance arm of the balance arm; a second spherical pivot is embedded in each second connecting rod head pivot seat, a second spherical pivot hole is formed in the middle of each second spherical pivot, a second screw is pivotally inserted through each second spherical pivot hole, and each second screw is screwed into the connecting rod pivot screw hole of each connecting rod pivot seat.

6. The two-wheeled front fork structure as described in claim 5, wherein, Each of the first screws has a first head, a first shaft, and a first threaded rod that are concentrically connected in sequence. The width of each first head is greater than that of each first shaft, and the width of each first shaft is greater than that of each first threaded rod. Each first shaft is pivotally inserted through the through hole of each first spherical pivot member, and each first threaded rod is screwed into the threaded hole of each balance arm of the balance arm. Each of the second screws has a second head, a second shaft, and a second threaded rod that are concentrically connected in sequence. The width of each second head is greater than that of each second shaft, and the width of each second shaft is greater than that of each second threaded rod. Each second shaft is pivotally inserted through the through hole of each second spherical pivot member, and each second threaded rod is screwed into the connecting rod pivot threaded hole of each connecting rod pivot seat.

7. The two-wheeled front fork structure as described in claim 5, wherein, Each of the screws has an operating member in the middle, and each of the operating members is a polygonal prism.

8. The two-wheeled front fork structure as described in claim 1, wherein, The lower tube is a curved tube extending downward and forward, and a front pivot is connected to the lower end of the lower tube; the front fork tube is provided with a reinforcing tube, one end of which is connected to the upper tube, and the other end of which is connected to the front pivot.

9. The two-wheeled front fork structure as described in claim 1, wherein, The front pivot seat has a front axle hole; each of the swing arm pivot seats has a swing arm axle hole, and each of the swing arm axle holes is directly opposite the front axle hole in the left-right direction; a first pivot is provided in conjunction with the front pivot seat and each of the swing arm pivot seats, the middle of the first pivot pivotally passes through the front axle hole of the front pivot seat, and the left and right sides of the first pivot pivotally pass through the swing arm axle holes of each of the swing arm pivot seats respectively.

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