Front fork damping structure of small-wheel vehicle

Abstract

The utility model relates to a small-wheel vehicle front fork damping structure which comprises a vertical pipe, a vertical sleeve, a fork shoulder and a fork leg. The vertical sleeve penetrates through the middle hole of the fork leg and forms fixed connection, the vertical pipe penetrates through the middle hole of the fork shoulder, the lower part of the vertical pipe is fixedly connected with the fork shoulder, the vertical sleeve penetrates from the lower end of the vertical pipe and forms sliding connection with the vertical pipe, and the fork shoulder is arranged above the fork leg; a pressure spring is arranged between the vertical pipe and the vertical sleeve, the top end of the pressure spring penetrates into the vertical pipe and abuts against a blocking table in the vertical pipe, and the bottom end of the pressure spring penetrates into the vertical sleeve and abuts against an inner ring step on the inner wall of the vertical sleeve. Guide rods are arranged on the two sides of the compression spring respectively and penetrate through the penetrating holes of the fork shoulders, the top ends of the guide rods are arranged in the penetrating holes, the bottom ends of the guide rods are fixedly connected with the fork legs, and the axial directions of the guide rods are parallel to the axial direction of the compression spring. The overall structure is relatively simpler, disassembly, assembly and maintenance convenience is improved, overall stress can be balanced, and the damping effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of scooters, and more specifically to a front fork shock absorbing structure of a small wheeled vehicle. Background Art

[0002] As a means of transportation and leisure and entertainment, small-wheeled scooters are becoming more and more popular among consumers. When scooters encounter bumpy roads during driving, they will vibrate, affecting the driving experience. To solve this problem, scooters are often equipped with shock-absorbing structures, which often use shock-absorbing springs to achieve shock-absorbing effects. Common shock-absorbing structures have guide structures and springs. The guide structure is installed through the spring and needs to be fixedly connected. The installation structure is relatively complex, which is not conducive to disassembly and maintenance, and needs to be improved. Utility Model Content

[0003] The purpose of the present application is to overcome the above-mentioned deficiencies of the prior art and to provide a shock-absorbing structure for a front fork of a BMX bicycle so as to simplify the structure and improve the convenience of disassembly, assembly and maintenance.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a shock-absorbing structure for a front fork of a small bicycle, comprising a vertical tube, a vertical sleeve, a fork shoulder and a fork leg; the vertical sleeve passes through the middle hole of the fork leg and forms a fixed connection, the vertical tube passes through the middle hole of the fork shoulder and the lower part of the vertical tube is fixedly connected to the fork shoulder, the vertical sleeve passes through the lower end of the vertical tube and the two form a sliding connection, and the fork shoulder is arranged above the fork leg; a compression spring is arranged between the vertical tube and the vertical sleeve, the top end of the compression spring passes through the vertical tube and the top end abuts against the stopper in the vertical tube, the bottom end of the compression spring passes through the vertical sleeve and the bottom end of the compression spring abuts against the inner ring step of the inner wall of the vertical sleeve; guide rods are respectively arranged on both sides of the compression spring, the guide rods pass through the through-holes of the fork shoulder and the top end of the guide rods is placed in the through-holes, the bottom end of the guide rods is fixedly connected to the fork leg, and the axial direction of the guide rod is parallel to the axial direction of the compression spring.

[0005] Compared with the prior art, the beneficial effects of the present application are as follows: the compression spring of the shock-absorbing structure is arranged in the middle, and the guide rods are arranged on both sides of the compression spring instead of being assembled in the middle of the compression spring. The overall structure is relatively simpler, which improves the convenience of disassembly and maintenance. In addition, the guide rods are used for guiding and limiting on both sides, and the middle vertical pipe and the vertical sleeve cooperate to play a guiding role at the same time, which can make the overall force balanced and stable, so as to improve the shock-absorbing effect.

[0006] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Assemble the structural diagram for the shock absorbing structure.

[0008] Figure 2 This is an exploded view of the shock-absorbing structure.

[0009] Figure 3 A top view of the fork crown.

[0010] Figure 4 Schematic diagram of a shock absorbing structure installed on a scooter.

[0011] Figure 5 and Figure 6 They are vertical views of different examples.

[0012] It should be noted that the products shown in the above views have been appropriately reduced / enlarged to suit the size of the drawings and for clarity of the views, and there is no restriction on the size of the products shown in the views. DETAILED DESCRIPTION

[0013] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0015] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0016] The embodiment of the present application is a front fork shock absorbing structure of a small wheel bicycle, and its specific structure is as follows Figures 1 to 6 shown.

[0017] Combination Figure 1 and Figure 2As shown, the shock absorbing structure includes a vertical tube 11, a vertical sleeve 22, a fork crown 12 and a fork leg 21. The vertical sleeve 22 penetrates the middle hole 211 of the fork leg 21 and forms a fixed connection, while the vertical tube 11 penetrates the middle hole 120 of the fork crown 12 and the lower part of the vertical tube 11 is fixedly connected to the fork crown 12. The vertical sleeve 22 penetrates from the lower end of the vertical tube 11 and the two form a sliding connection. When the vertical sleeve 22 moves up and down in the vertical tube 11, the vertical sleeve 22 cooperates with the vertical tube 11 to also play a guiding role in the up and down movement. A compression spring 30 is arranged between the vertical tube 11 and the vertical sleeve 22. The top end of the compression spring 30 penetrates into the vertical tube 11 and the top end abuts against the stopper 111 in the vertical tube 11. The bottom end of the compression spring 30 penetrates into the vertical sleeve 22 and the bottom end of the compression spring 30 abuts against the inner ring step 221 on the inner wall of the vertical sleeve 22. The fork crown 12 is arranged above the fork leg 21. A guide rod 40 is provided on both sides of the compression spring 30. The guide rod 40 passes through the through hole 121 of the fork shoulder 12 and the top end 41 of the guide rod 40 is placed in the through hole 121. The bottom end of the guide rod 40 is fixedly connected to the fork leg 21. The axial direction of the guide rod 40 is parallel to the axial direction of the compression spring 30. Due to the restoring force of the compression spring 30, the vertical tube 11 and the fork shoulder 12 tend to move away from the fork leg 21. The top end 41 of the guide rod 40 will be stuck in the through hole 121. The vertical tube 11 and the fork shoulder 12 are restricted by the through hole 121 and the guide rod 40 and will not be separated from the fork leg 21.

[0018] In some embodiments, in combination Figure 1 and Figure 2 As shown, the vertical tube 11 passes through the middle hole 120 of the fork crown 12, and the lower part of the vertical tube 11 is fixedly connected to the fork crown 12. Specifically, the outer wall of the lower part of the vertical tube 11 is provided with a shaft shoulder 112, and the inner part of the middle hole 120 of the fork crown 12 is correspondingly provided with a hole shoulder 122. The lower end of the vertical tube 11 is provided with a flange 113, and the lower opening of the middle hole 120 of the fork crown 12 is correspondingly provided with a step 123. When the vertical tube 11 passes through the middle hole 120 of the fork crown 12, under the action of the axial restoring force of the compression spring 30, the shaft shoulder 112 is correspondingly pressed against the hole shoulder 122, and the flange 113 is correspondingly placed in the step 123 and closely attached to each other, so that the vertical tube 11 and the fork crown 12 are relatively fixed.

[0019] In some embodiments, in combination Figure 1 and Figure 2 As shown, the through hole 121 is provided on both sides of the fork shoulder 12, and the through hole 121 is a stepped hole. The outer diameter of the top end 41 of the guide rod 40 is larger than the minimum inner diameter of the through hole 121, and a section of the minimum inner diameter of the through hole 121 is provided at the bottom of the through hole 121. In addition, a sleeve 60 is inserted into a section of the minimum inner diameter of the through hole 121, and the guide rod 40 passes through the sleeve 60. The sleeve 60 is used to reduce friction and bear wear, and avoid direct wear of the through hole 121.

[0020] In some embodiments, in combination Figure 1 and Figure 2 As shown, the vertical sleeve 22 passes through the hole 211 in the fork leg 21 and is fixedly connected to each other by screwing in screws.

[0021] In some embodiments, in combination Figure 1 and Figure 2 As shown, the bottom end 42 of the guide rod 40 has an external thread, and the fork leg 21 is provided with an internal thread hole 212 corresponding to the guide rod 40. The bottom end 42 of the guide rod 40 is screwed into the internal thread hole 212 to form a fixed connection. Specifically, two guide rods 40 are respectively provided on both sides of the compression spring 30, and the through holes 121 correspond to the guide rods 40 one by one. Figure 3 As shown, two through holes 121 are respectively provided on both sides of the fork shoulder 12. In other embodiments, only one guide rod may be respectively provided on both sides of the compression spring.

[0022] In some embodiments, in combination Figure 1 and Figure 2 As shown, the guide rod 40 also passes through a dust cover 51 and a buffer pad 52, and the dust cover 51 and the buffer pad 52 are placed between the fork crown 12 and the fork leg 21. The dust cover 51 is used to reduce the damage of sand and dust to the guide rod 40. The buffer pad 52 is used to reduce the hard impact between the fork crown 12 and the fork leg 21. In addition, a dust plug can be inserted into the top opening of the through hole 121 to prevent sand and dust from entering from the top opening.

[0023] Furthermore, in some embodiments, Figure 3 As shown, the top surface of the fork shoulder 12 is provided with two symmetrical arc grooves 124, and a limit pin 125 is inserted into each arc groove 124. Figure 4 As shown, the vertical tube 11 penetrates into the front end of the scooter frame 70, and the limit pin 125 penetrates into the frame 70 and is fixed, so when the fork leg 21 rotates relative to the frame 70, the limit pin 125 moves in the arc groove 124, and the arc groove 124 limits the range of movement of the limit pin 125, that is, the rotation range of the fork leg 21 is limited. Figure 4 As shown, the lower end of the fork leg 21 is connected to the wheel 80 via a rotating shaft 81. The fork leg 21 is also fixedly connected to a fender 90.

[0024] In some embodiments, Figure 5 As shown, the cross section of the outer wall of the vertical sleeve 22 is circular, and the cross section of the inner wall of the vertical tube is the same as the cross section of the outer wall of the vertical sleeve, and the sizes of the two are basically the same. In this structure, the vertical sleeve and the vertical tube can slide and guide better, and the inner holes of the two are integrated through holes, which are convenient for installing compression springs and internal wiring, and the processing is simple and low in cost.

[0025] In some embodiments, Figure 6 As shown, the cross section of the outer wall of the vertical sleeve 22 is a polygon (such as a regular dodecagon), and the cross section of the inner wall of the vertical tube is the same as the cross section of the outer wall of the vertical sleeve, and the sizes of the two are basically the same. This structure can better achieve stable rotation and guiding parallelism, and the inner holes of the two are integrated through holes, which are convenient for installing compression springs and internal wiring.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0029] The above examples are only used to further illustrate the technical content of this application so that readers can understand it more easily, but they do not mean that the implementation methods of this application are limited to these. Any technical extension or re-creation made based on this application is protected by this application. The scope of protection of this application shall be subject to the claims.

Claims

1. A shock absorbing structure for a front fork of a BMX bicycle, characterized in that: It includes a vertical tube, a vertical sleeve, a fork crown and a fork leg; the vertical sleeve passes through the hole in the fork leg and forms a fixed connection, the vertical tube passes through the hole in the fork crown and the lower part of the vertical tube is fixedly connected to the fork crown, the vertical sleeve passes through the lower end of the vertical tube and the two form a sliding connection, and the fork crown is arranged above the fork leg; A compression spring is provided between the vertical tube and the vertical sleeve, the top end of the compression spring penetrates into the vertical tube and abuts against the stopper in the vertical tube, the bottom end of the compression spring penetrates into the vertical sleeve and abuts against the inner ring step of the inner wall of the vertical sleeve; Guide rods are respectively arranged on both sides of the compression spring, the guide rods pass through the through holes of the fork shoulders and the top ends of the guide rods are placed in the through holes, the bottom ends of the guide rods are fixedly connected to the fork legs, and the axial direction of the guide rods is parallel to the axial direction of the compression springs.

2. The shock absorbing structure of the front fork of a BMX bicycle according to claim 1, characterized in that: The lower outer wall of the vertical tube is provided with an axial shoulder, and the middle hole of the fork shoulder is provided with a hole shoulder. When the vertical tube penetrates into the middle hole of the fork shoulder, the axial shoulder correspondingly abuts against the hole shoulder.

3. The shock absorbing structure of the front fork of a BMX bicycle as claimed in claim 1, characterized in that: A flange is arranged at the lower end of the vertical tube, and a step is arranged at the lower opening of the middle hole of the fork shoulder. When the vertical tube penetrates into the middle hole of the fork shoulder, the flange is correspondingly placed in the step.

4. The shock absorbing structure of the front fork of a BMX bicycle as claimed in claim 1, characterized in that: The through hole is a stepped hole, the outer diameter of the top end of the guide rod is larger than the minimum inner diameter of the through hole, and a section of the minimum inner diameter of the through hole is arranged at the bottom of the through hole.

5. The shock absorbing structure of the front fork of a BMX bicycle as claimed in claim 4, characterized in that: A section of the through hole with the smallest inner diameter penetrates into a shaft sleeve, and the guide rod passes through the shaft sleeve.

6. The shock absorbing structure of the front fork of a BMX bicycle as claimed in claim 1, characterized in that: The lower part of the guide rod is provided with an external thread, and the fork leg is provided with an internal thread hole corresponding to the guide rod, and the lower part of the guide rod is screwed into the internal thread hole to form a fixed connection.

7. The shock absorbing structure of the front fork of a BMX bicycle as claimed in claim 1, characterized in that: The guide rod also passes through a dust cover and a buffer pad, and the dust cover and the buffer pad are placed between the fork crown and the fork leg.

8. The front fork shock absorbing structure of a BMX bicycle according to any one of claims 1 to 7, characterized in that: Two guide rods are respectively arranged on both sides of the compression spring, and the through holes correspond to the guide rods one by one.

9. The front fork shock absorbing structure of a BMX bicycle as claimed in any one of claims 1 to 7, characterized in that: The cross section of the vertical sleeve outer wall is circular, and the cross section of the vertical tube inner wall is the same as the cross section of the vertical sleeve outer wall; or the cross section of the vertical sleeve outer wall is polygonal, and the cross section of the vertical tube inner wall is the same as the cross section of the vertical sleeve outer wall.

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