Shock absorbing carbon fiber bicycle fork

Abstract

The utility model discloses a shock -absorbing carbon fiber bicycle front fork, this shock -absorbing carbon fiber bicycle front fork includes: upper pipe, fork shoulder, stroke pipe, fork bucket, disc brake mounting seat and plug foot, the shock -absorbing carbon fiber bicycle front fork still includes shock -absorbing subassembly, and the shock -absorbing subassembly is installed in the stroke pipe of main fork bucket and cooperation connection, to form the main shock -absorbing structure of bicycle front fork, the shock -absorbing subassembly includes oil spring shock -absorbing subassembly, elastic metal damping unit and damping damping unit, and oil spring shock -absorbing subassembly is installed in the stroke pipe of main fork bucket and cooperation connection, elastic metal damping unit sets up in the plunger rod top of oil spring shock -absorbing subassembly, and damping damping unit sets up between plunger rod bottom and main fork bucket bottom wall. Shock -absorbing carbon fiber bicycle front fork bears the core damping function through main fork bucket integration shock -absorbing subassembly, and metal damping unit is placed in plunger rod top, and it is deformed in priority before oil spring shock -absorbing subassembly starts, and high -efficient absorption high -frequency small vibration.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle front fork technical field, in particular to a kind of shock-absorbing carbon fibre bicycle front fork. BACKGROUND

[0002] Bicycle front fork is the core component of connecting frame and front wheel, and its core function is to support front wheel, realize steering control and absorb road impact.The main functions of front fork include: structural connection, upper end is connected with frame head pipe through steering tube (realize steering by built-in bowl group bearing), lower end is fixed front wheel axle through axle fork;Control transmission, steering force of handlebar is transmitted to front wheel, and the direction of travel is controlled;Shock-absorbing buffering (if it is shock-absorbing front fork), road vibration is absorbed by spring / air pressure+damping system.The main structural components of front fork include: steering tube, inserted into frame head pipe, connect front fork and frame;Fork shoulder, connect steering tube and two fork legs, disperse stress;Fork leg, divided into upper tube (expansion part) and lower tube (fixed part), shock-absorbing structure can be integrated inside;Axle fork, lower end is slotted structure, used for fixing front wheel axle;Disc brake mounting seat, install disc brake caliper.For shock-absorbing front fork, the main types mainly include oil spring front fork, air pressure front fork and mixed shock-absorbing

[0003] However, the shock-absorbing effect of the existing bicycle shock-absorbing front fork still has deficiencies, and there is still a lot of room for improvement for the existing shock-absorbing front fork to cope with increasingly diverse daily and competitive scenarios. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a shock-absorbing carbon fibre bicycle front fork to solve the technical problem of insufficient shock-absorbing performance of the existing shock-absorbing front fork.

[0005] A shock-absorbing carbon fibre bicycle front fork, which comprises an upper tube, a fork shoulder, a stroke tube, a fork barrel, a disc brake mounting seat and a plug; the bottom end of the upper tube is connected to the top side of the middle part of the fork shoulder; the stroke tube is provided in two sections, and the top ends of the two stroke tubes are respectively connected to the bottom sides of the two sections of the fork shoulder; the fork barrel is provided as a main fork barrel and a balance fork barrel, and the main fork barrel and the balance fork barrel are respectively sleeved by the bottom ends of the corresponding two stroke tubes to the side surfaces of the corresponding stroke tubes; the disc brake mounting seat is arranged on the side surface of the bottom end of the main fork barrel; the plug is provided in two, and the two plugs are respectively arranged on the bottom end of the main fork barrel and the bottom end of the balance fork barrel, so as to form the basic support structure of the bicycle front fork.

[0006] The shock-absorbing carbon fibre bicycle front fork further comprises a shock-absorbing assembly, which is installed in the main fork barrel and the stroke tube connected therewith, so as to form the main shock-absorbing structure of the bicycle front fork.

[0007] The shock absorbing assembly includes an oil spring shock absorbing assembly, an elastic metal shock absorbing unit, and a damping shock absorbing unit. The oil spring shock absorbing assembly is installed in the main fork barrel and the stroke tube connected therewith. The elastic metal shock absorbing unit is arranged at the top of the plunger rod of the oil spring shock absorbing assembly. The damping shock absorbing unit is arranged between the bottom end of the plunger rod and the bottom wall of the main fork barrel.

[0008] In one embodiment, the oil spring shock absorbing assembly includes a main spring and a negative spring. The main spring is accommodated in the top of the corresponding stroke tube. The negative spring is accommodated in the bottom of the corresponding stroke tube. Based on this, the bottom end of the plunger rod is accommodated in the main fork barrel and abuts to the top of the damping shock absorbing unit. The top end of the plunger rod extends through the negative spring and extends to the bottom end of the main spring, so that the top end of the negative spring abuts to the bottom side surface of the top end of the plunger rod. Thus, the elastic metal shock absorbing unit is arranged between the top end of the plunger rod and the bottom end of the main spring.

[0009] In one embodiment, the oil spring shock absorbing assembly further includes two first spring seats and a second spring seat. The two first spring seats are arranged at the top and bottom ends of the main spring, respectively. The second spring seat is arranged on the inner surface of the bottom wall of the corresponding stroke tube, thereby ensuring the stable installation of the main spring and the negative spring.

[0010] In one embodiment, the elastic metal shock absorbing unit is arranged between the top end of the plunger rod and the first spring seat at the bottom end of the main spring.

[0011] In one embodiment, the oil spring shock absorbing assembly further includes an adjusting unit. The adjusting unit is installed at the top end of the corresponding stroke tube. The bottom end of the adjusting unit is matched to the first spring seat at the top end of the main spring. The top end of the adjusting unit extends to the top side of the corresponding end of the fork shoulder.

[0012] In one embodiment, the elastic metal shock absorbing unit is arranged as an elastic metal shock absorbing washer.

[0013] In one embodiment, the damping shock absorbing unit is arranged as a damping shock absorber.

[0014] In one embodiment, the balance fork barrel is internally provided with a gas spring. The gas spring is installed in the balance fork barrel. The top end of the piston rod of the gas spring extends along the length direction of the corresponding stroke tube and is connected to the top side of the corresponding end of the fork shoulder.

[0015] In one embodiment, the bottom end of the main body of the gas spring is connected to the bottom wall of the balance fork barrel.

[0016] In one embodiment, another damping shock absorber is arranged between the main body of the gas spring and the bottom wall of the balance fork barrel.

[0017] The aforementioned carbon fiber bicycle fork integrates a shock-absorbing component in the main fork to handle the core damping function. The balance fork only provides lateral support, reducing redundant material. Simultaneously, the disc brake mount is located in the main fork, allowing the impact force during braking to be directly transmitted to the suspension system. The balance fork only bears lateral forces on the non-driving side, avoiding torsional deformation. The metal damping unit is positioned at the top of the plunger rod, deforming preferentially before the oil spring shock absorber activates, efficiently absorbing high-frequency small vibrations. The oil spring shock absorber dominates the mid-to-rear-stage damping, solving the initial stiffness issue of pure oil spring shock absorbers and thus improving the initial sensitivity of the fork's shock absorption. The damping unit is directly connected to the bottom of the plunger rod and the bottom wall of the main fork, shortening the hydraulic circuit and reducing delay. It also precisely controls the rebound speed of the oil spring shock absorber by suppressing rebound oscillations, preventing vehicle loss of control due to the "spring effect." Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a shock-absorbing carbon fiber bicycle fork in one embodiment;

[0019] Figure 2 This is a schematic diagram of the exploded structure of a shock-absorbing carbon fiber bicycle fork in one embodiment;

[0020] Figure 3 This is a schematic diagram of the structure of a shock-absorbing carbon fiber bicycle fork in one embodiment;

[0021] Figure 4 for Figure 3 A schematic cross-sectional view of part AA in the illustrated embodiment;

[0022] Figure 5 for Figure 4 An enlarged structural schematic diagram of part M in the illustrated embodiment;

[0023] Figure 6 for Figure 4 An enlarged structural diagram of part N in the illustrated embodiment. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] Please see Figures 1 to 6 This utility model discloses a shock-absorbing carbon fiber bicycle fork 1, which includes a top tube 10, a fork shoulder 20, a travel tube 30, a fork shank 40, a disc brake mount 50, and pins 60. The bottom end of the top tube 10 is connected to the top side of the middle part of the fork shoulder 20. The travel tube 30 is configured as two sections, and the top ends of the two travel tubes 30 are respectively connected to the bottom sides of the two sections of the fork shoulder 20. The fork shank 40 is configured as a main fork shank 41 and a counter fork shank 42, and the main fork shank 41 and the counter fork shank 42 are respectively fitted onto the side surface of the corresponding two travel tubes 30 from their bottom ends. The disc brake mount 50 is disposed on the side surface of the bottom end of the main fork shank 41. There are two pins 60, and the two pins 60 are respectively disposed at the bottom end of the main fork shank 41 and the bottom end of the counter fork shank 42, thereby forming the basic support structure of the bicycle fork. Based on the above configuration, the shock-absorbing carbon fiber bicycle fork 1 also includes a shock-absorbing assembly 70. The shock-absorbing assembly 70 is installed inside the main fork tube 41 and the stroke tube 30 connected thereto, forming the main shock-absorbing structure of the bicycle fork. Specifically, the shock-absorbing assembly 70 includes a spring-loaded shock-absorbing assembly 71, an elastic metal damping unit 72, and a damping damping unit 73. The spring-loaded shock-absorbing assembly 71 is installed inside the main fork tube 41 and the stroke tube 30 connected thereto; the elastic metal damping unit 72 is disposed at the top of the plunger rod 711 of the spring-loaded shock-absorbing assembly 71; and the damping damping unit 73 is disposed between the bottom end of the plunger rod 711 and the bottom wall of the main fork tube 41. Based on this, the shock-absorbing carbon fiber bicycle front fork 1 of this utility model integrates a shock-absorbing component 70 in the main fork 41 to undertake the core shock absorption function, while the balance fork 42 only provides lateral support, reducing redundant materials. At the same time, the disc brake mounting base 50 is located in the main fork 41, and the impact force during braking is directly transmitted to the shock absorption system. The balance fork 42 only bears the lateral force on the non-driving side, avoiding torsional deformation. The metal shock-absorbing unit is placed on the top of the plunger rod 711 and deforms preferentially before the oil spring shock-absorbing component 71 is activated, efficiently absorbing high-frequency small vibrations. The oil spring shock-absorbing component 71 dominates the mid-to-rear stage of shock absorption, solving the problem of the initial stiffness of the pure oil spring shock-absorbing component 71, thereby improving the sensitivity of the initial stage of the front fork shock absorption. The damping shock-absorbing unit 73 is directly connected to the bottom end of the plunger rod 711 and the bottom wall of the main fork 41, shortening the hydraulic oil circuit and reducing delay. At the same time, it can accurately control the rebound speed of the oil spring shock-absorbing component 71 by suppressing rebound oscillation, avoiding vehicle loss of control caused by the "spring effect".

[0031] Furthermore, the oil spring damping assembly 71 includes a main spring 712 and a negative spring 713. The main spring 712 is housed at the top of the corresponding stroke tube 30; the negative spring 713 is housed at the bottom of the corresponding stroke tube 30. Based on this, the bottom end of the plunger rod 711 is housed within the main fork cascade 41 and abuts against the top of the damping unit 73. The top end of the plunger rod 711 passes through the negative spring 713 and extends to the bottom end of the main spring 712, such that the top end of the negative spring 713 abuts against the bottom surface of the top end of the plunger rod 711. Thus, the elastic metal damping unit 72 is disposed between the top end of the plunger rod 711 and the bottom end of the main spring 712. Based on the above configuration, the oil spring damping assembly 71, as the main shock absorption mechanism of the bicycle fork, can provide linear support force. Simultaneously, the hydraulic pressure adjustment can adapt to different weights and road conditions. Furthermore, the single negative spring 713 structure can reduce the weight of the oil spring damping assembly 71 and lower the failure rate.

[0032] Furthermore, the oil spring damping assembly 71 also includes two first spring seats 714 and a second spring seat 715; the two first spring seats 714 are respectively disposed at the top and bottom ends of the main spring 712; the second spring seat 715 is disposed on the inner surface of the bottom wall of the corresponding stroke tube 30, thereby ensuring the stable installation of the main spring 712 and the negative spring 713. Based on this, the elastic metal damping unit 72 is disposed between the top end of the plunger rod 711 and the first spring seat 714 at the bottom end of the main spring 712.

[0033] Furthermore, the oil spring shock absorber assembly 71 also includes an adjustment unit 716, which is installed at the top of the corresponding stroke tube 30. The bottom end of the adjustment unit 716 is fitted to the first spring seat 714 at the top of the main spring 712, and the top end of the adjustment unit 716 extends to the top side of the corresponding end of the fork shoulder 20, so that the user can adjust the pre-compression of the main spring 712 through the adjustment unit 716.

[0034] Furthermore, in one embodiment, the elastic metal damping unit 72 is configured as an elastic metal damping washer; in another embodiment, the damping damping unit 73 is configured as a damping damper.

[0035] Furthermore, a gas spring 421 is installed inside the counterbalance fork barrel 42. The gas spring 421 is installed inside the counterbalance fork barrel 42, and the top end of the piston rod 4211 of the gas spring 421 extends along the length direction of the corresponding stroke tube 30 and connects to the corresponding top end of the fork shoulder 20. Specifically, the bottom end of the main body of the gas spring 421 is connected to the bottom wall of the counterbalance fork barrel 42 to ensure the installation stability of the gas spring 421.

[0036] Furthermore, another damping shock absorber is provided between the main body of the gas spring 421 and the bottom wall of the balance fork barrel 42 to enhance the balance fork barrel 42's ability to absorb high-frequency small vibrations.

[0037] In summary, the shock-absorbing carbon fiber bicycle fork disclosed in this utility model integrates a shock-absorbing component in the main fork to undertake the core shock absorption function, while the balance fork only provides lateral support, reducing redundant materials. Simultaneously, the disc brake mount is located in the main fork, allowing the impact force during braking to be directly transmitted to the shock absorption system. The balance fork only bears lateral forces on the non-driving side, avoiding torsional deformation. The metal damping unit is placed on top of the plunger rod, deforming preferentially before the oil spring shock absorber assembly activates, efficiently absorbing high-frequency small vibrations. The oil spring shock absorber assembly dominates the mid-to-rear stage of shock absorption, solving the initial stiffness problem of pure oil spring shock absorber assemblies, thereby improving the sensitivity of the fork's initial shock absorption. The damping unit is directly connected to the bottom end of the plunger rod and the bottom wall of the main fork, shortening the hydraulic circuit and reducing delay. Simultaneously, it can precisely control the rebound speed of the oil spring shock absorber assembly by suppressing rebound oscillations, avoiding vehicle loss of control caused by the "spring effect."

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A shock-absorbing carbon fiber bicycle front fork, characterized in that, include: The bicycle fork consists of a top tube, fork shoulder, travel tube, fork spool, disc brake mount, and pins. The bottom end of the top tube is connected to the top side of the middle of the fork shoulder. The travel tube is divided into two sections, with the top ends of the two travel tubes connected to the bottom sides of the two sections of the fork shoulder respectively. The fork spool consists of a main fork spool and a counter fork spool, with the main fork spool and counter fork spool respectively fitted onto the side surface of the corresponding two travel tubes from their bottom ends. The disc brake mount is located on the side surface of the bottom end of the main fork spool. There are two pins, which are respectively located at the bottom ends of the main fork spool and the bottom ends of the counter fork spool, thus forming the basic support structure of the bicycle fork. The shock-absorbing carbon fiber bicycle fork also includes a shock-absorbing component, which is installed in the main fork tube and the stroke tube connected to it to form the main shock-absorbing structure of the bicycle fork. The shock absorption assembly includes a hydraulic spring shock absorption assembly, an elastic metal damping unit, and a damping damping unit. The hydraulic spring shock absorption assembly is installed inside the main fork barrel and the stroke tube connected to it; the elastic metal damping unit is located at the top of the plunger rod of the hydraulic spring shock absorption assembly; and the damping damping unit is located between the bottom end of the plunger rod and the bottom wall of the main fork barrel.

2. The shock-absorbing carbon fiber bicycle fork according to claim 1, characterized in that, The oil spring damping assembly includes a main spring and a negative spring. The main spring is housed at the top of the corresponding stroke tube, and the negative spring is housed at the bottom of the corresponding stroke tube. Based on this, the bottom end of the plunger rod is housed in the main fork barrel and abuts against the top of the damping unit. The top end of the plunger rod passes through the negative spring and extends to the bottom end of the main spring, so that the top end of the negative spring abuts against the bottom surface of the top end of the plunger rod. Thus, the elastic metal damping unit is disposed between the top end of the plunger rod and the bottom end of the main spring.

3. The shock-absorbing carbon fiber bicycle fork according to claim 2, characterized in that, The oil spring damping assembly also includes two first spring seats and a second spring seat; the two first spring seats are respectively located at the top and bottom ends of the main spring; the second spring seat is located on the inner surface of the bottom wall of the corresponding stroke tube, thereby ensuring the stable installation of the main spring and the negative spring.

4. The shock-absorbing carbon fiber bicycle fork according to claim 3, characterized in that, The elastic metal damping unit is located between the top of the plunger rod and the first spring seat at the bottom of the main spring.

5. The shock-absorbing carbon fiber bicycle fork according to claim 4, characterized in that, The oil spring shock absorber assembly also includes an adjustment unit, which is installed at the top of the corresponding stroke tube. The bottom of the adjustment unit is fitted to the first spring seat at the top of the main spring, and the top of the adjustment unit extends to the top side of the corresponding end of the fork shoulder.

6. The shock-absorbing carbon fiber bicycle fork according to claim 5, characterized in that, The elastic metal damping unit is set as an elastic metal damping washer.

7. The shock-absorbing carbon fiber bicycle fork according to claim 6, characterized in that, The damping and shock absorption unit is set as a damping shock absorber.

8. The shock-absorbing carbon fiber bicycle fork according to claim 7, characterized in that, The counterbalance fork barrel is equipped with a gas spring. The gas spring is installed inside the counterbalance fork barrel, and the top of the piston rod of the gas spring extends along the length of the corresponding stroke tube and connects to the top side of the corresponding end of the fork shoulder.

9. The shock-absorbing carbon fiber bicycle fork according to claim 8, characterized in that, The bottom end of the air spring body is connected to the bottom wall of the counterbalance fork barrel.

10. The shock-absorbing carbon fiber bicycle fork according to claim 9, characterized in that, Another damping shock absorber is installed between the air spring body and the bottom wall of the balance fork barrel.

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