Front fork assembly and electric bicycle

Abstract

The utility model discloses a front fork assembly and an electric bicycle, and the front fork assembly comprises a front fork, the front fork comprises a vertical pipe, and the outer wall of the vertical pipe is provided with a limiting groove; the external thread part is annular, is arranged on the vertical pipe in a sleeving manner, and is provided with a first connecting hole and a first thread positioned on the peripheral side; the screw penetrates through the first connecting hole and is inserted into the limiting groove so as to fix the external thread part on the vertical pipe; the internal thread part is arranged on the outer side of the external thread part in a sleeving mode, a second thread meshed with the first thread is arranged on the inner side of the internal thread part, and the internal thread part can axially move along the external thread part through rotation so that the lower end face of the internal thread part can tightly press the bowl set and fix the front fork in the axial direction. The front fork assembly is fixed on a vertical pipe of a front fork through an external thread piece, and the front fork can be rotatably fixed in a head pipe of a bicycle frame by screwing up an internal thread piece sleeved on the outer side of the external thread piece along threads and matching with a bowl group.

Description

Technical Field

[0001] This utility model relates to the field of electric bicycle manufacturing technology, specifically a front fork assembly and an electric bicycle. Background Technology

[0002] Electric bicycles are transportation vehicles based on ordinary bicycles, equipped with motors, controllers, batteries, throttles, brake levers, and display systems. They are now widely used by the public as a convenient means of transportation. Existing bicycles or electric bicycles use a headset and swivel assembly to fix the fork to the head tube of the frame. The swivel assembly needs to expand inside the steerer tube of the fork to secure it. Then, a top cover with screws connects to the threaded hole of the swivel assembly at the top of the steerer tube and is tightened to fix the steerer tube axially. This method is only suitable for forks of fixed length, and the length of the fork steerer tube should not be too long. Summary of the Invention

[0003] In order to overcome the defects in the prior art, the present invention provides a front fork assembly and an electric bicycle. The front fork assembly is fixed to the steer tube of the front fork using an external threaded part. By tightening the internal threaded part, which is sleeved on the outside of the external threaded part, along the thread, and in conjunction with the headset, the front fork can be rotatably fixed inside the head tube of the frame.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a front fork assembly, comprising:

[0005] The fork includes a vertical tube, and the outer wall of the vertical tube is provided with a limiting groove;

[0006] An external threaded component, which is annular and sleeved on the vertical pipe, is provided with a first connecting hole and a first thread located on the circumference of the external threaded component;

[0007] A screw is passed through the first connecting hole and inserted into the limiting groove to fix the external threaded part to the vertical pipe;

[0008] An internal threaded component is sleeved on the outside of the external threaded component. The inner side of the internal threaded component is provided with a second thread that meshes with the first thread. The internal threaded component can be rotated to move axially along the external threaded component so that its lower end face presses against the headset and fixes the fork axially.

[0009] With the above technical solution, the external threaded part is simply fixed to the steer tube of the fork, and the internal threaded part, which is sleeved on the outside of the external threaded part, is tightened along the thread. With the headset, the fork can be rotatably fixed inside the head tube of the frame. The installation steps of this solution are simple and are not affected by the length of the steer tube.

[0010] Furthermore, the limiting groove includes an annular groove formed on the surface of the vertical pipe. The design of the annular groove simplifies the installation of the screw, as there is no positioning restriction in the circumferential direction. The external threaded component can be fixed to the vertical pipe simply by inserting the screw into the annular groove in the axial direction.

[0011] Furthermore, the external threaded component is provided with at least three of the first connecting holes, which are arranged circumferentially. At least three connection points are required to ensure a stable connection of the external threaded component and prevent rotation of the external threaded component about the connection points. Moreover, the external threaded component is detachably mounted on the vertical pipe using screws, facilitating the disassembly of the assembled bicycle or electric bicycle during maintenance.

[0012] Furthermore, the periphery of the external threaded component is configured with alternating connecting portions and threaded portions. The connecting portions are provided with the first connecting hole, and the threaded portions are arc-shaped with the first thread on their surface. This design achieves a uniform distribution of the first connecting holes, ensuring stable connection of the external threaded component.

[0013] Furthermore, the screw includes a headless screw. Using a headless screw prevents the screw tail from extending into the mating path of the first and second threads.

[0014] Furthermore, the internally threaded component is provided with at least one second connecting hole, and a screw is disposed in the second connecting hole, the screw engaging with the externally threaded component. In this design, the screw provides a radial engagement force between the internally and externally threaded components, preventing the internally threaded component from loosening.

[0015] Furthermore, the height of the internal threaded component is greater than the height of the external threaded component to ensure that the bottom of the internal threaded component is sufficiently abutted against the cup assembly.

[0016] Furthermore, the upper end of the internally threaded component extends radially inward to form a cover, the cover being annular, and the inner diameter of the cover being equal to the outer diameter of the vertical pipe. The cover serves to protect the externally threaded component within the internally threaded component.

[0017] Furthermore, each of the first connecting holes is provided with two screws. The screw located on the inner side is used to securely connect the external threaded part and the vertical tube, while the screw located on the outer side prevents the screw located on the inner side from loosening.

[0018] An electric bicycle using the above-mentioned front fork assembly, wherein the front fork assembly is rotatably mounted inside the head tube of the electric bicycle frame via a headset, the external threaded part is fixed to the part of the vertical tube that extends out of the head tube, and the internal threaded part is adjusted so that its lower end abuts against the headset to rotatably fix the front fork assembly inside the head tube of the electric bicycle frame.

[0019] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0020] The fork assembly disclosed in this application fixes the external threaded part to the steer tube of the fork. By tightening the internal threaded part, which is sleeved on the outside of the external threaded part, along the thread, and in conjunction with the headset, the fork can be rotatably fixed in the head tube of the frame. Compared with the traditional solution of using a flower core assembly to fix the fork, this solution has a simple installation process and is not limited by the length of the steer tube.

[0021] In this application, a cover with the same outer diameter as the fork steer tube is provided at the upper end of the internal threaded part. The cover protects the external threaded part inside the internal threaded part, which can prevent dust from entering the first and second threads.

[0022] In this application, each first connecting hole is provided with two screws. The screw on the inner side is used to fix the external threaded part and the vertical pipe, and the screw on the outer side can prevent the screw on the inner side from loosening.

[0023] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the front fork assembly in an embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the front fork structure in an embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the external threaded component in an embodiment of this utility model;

[0028] Figure 4 This is a structural schematic diagram of the internal threaded component in an embodiment of this utility model.

[0029] Figure 5 This is a structural schematic diagram of the electric bicycle in an embodiment of this utility model.

[0030] The reference numerals in the above figures are as follows: 1. Front fork; 11. Stem tube; 12. Front fork leg; 2. External threaded part; 21. Connecting part; 211. First connecting hole; 22. Threaded part; 221. First thread; 3. Internal threaded part; 31. Second thread; 32. Annular part; 33. Cover; 34. Second connecting hole; 4. Headless screw; 5. Head tube. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] Example: This example discloses a front fork assembly, including:

[0034] Front fork 1, combined Figure 1 , 2 As shown, the front fork 1 includes a vertical tube 11, the lower end of which is connected to a fork leg 12 for mounting a wheel. The vertical tube 11 is used to pass through the head tube 5 of the frame. The vertical tube 11 enters from the lower port of the head tube 5 and exits from the upper port of the head tube 5, and the portion of the vertical tube 11 that exits the head tube 5 is provided with an annular groove 13.

[0035] A fork fixing assembly is fitted onto the vertical tube 11. The fork fixing assembly includes an externally threaded component 2 and an internally threaded component 3 fitted outside the externally threaded component 2. The inner diameter of the externally threaded component 2 is equal to the outer diameter of the vertical tube 11. Figure 3 As shown, the periphery of the external threaded component 2 is provided with four connecting portions 21 and four threaded portions 22, which are arranged alternately. A radial first connecting hole 211 is provided at each connecting portion 21. The first connecting hole 211 is threaded, and a headless screw 4 passes through the first connecting hole 211 and extends into the annular groove 12, thereby fixing the external threaded component 2 onto the vertical pipe 11.

[0036] In some feasible embodiments, two headless screws 4 are provided in each of the first connecting holes 211. The headless screw 4 located on the inner side is used to fix the external threaded part 2 and the vertical tube 11, while the headless screw 4 located on the outer side can prevent the headless screw 4 located on the inner side from loosening.

[0037] In this application, four connecting parts 21 are evenly arranged along the periphery of the external threaded part 2. Each connecting part 21 is provided with a first connecting hole 211. By passing the four headless screws 4 through the first connecting holes 211 respectively, the connection between the external threaded part 2 and the vertical pipe 11 can be ensured to be stable.

[0038] With the above technical solution, the external threaded component 1 is detachably mounted on the steer tube 11 using a headless screw 4. When assembling the vehicle, after passing the fork 1 through the head tube 5 of the frame and installing the headset, the external threaded component 1 is then connected to the steer tube 11. When disassembly is required, the external threaded component 1 is first removed from the steer tube 11, allowing the fork 1 to be removed.

[0039] In some feasible embodiments, the external threaded part 2 may include three connecting parts 21 and three threaded parts 22, or five connecting parts 21 and five threaded parts 22, or any other connecting parts 21 and threaded parts 22 greater than three.

[0040] In some feasible embodiments, the connecting portion 21 may be recessed inward.

[0041] The threaded portion 22 is arc-shaped and has a first thread 221. An internally threaded component 3 is fitted around the outer side of the externally threaded component 2, such as… Figure 4 As shown, the inner side of the internally threaded component 3 is provided with a second thread 31 that mates with the first thread 221. By rotating the internally threaded component 3, the lower end of the internally threaded component 3 can abut against the upper cover of the headset, thereby rotatably fixing the fork 1 inside the head tube 5 of the frame.

[0042] The use of a headless screw 4 allows the screw to be fully inserted into the first connecting hole 211, thereby preventing the screw from extending too far out of the first connecting hole 211 and thus avoiding affecting the threaded connection between the internal threaded part 3 and the external threaded part 2.

[0043] The internal threaded component 3 includes an annular portion 32 sleeved on the outside of the external threaded component 2, and a cover 33 disposed on the upper side of the annular portion 32. The cover 33 can cover the external threaded component 2 located inside the internal threaded component 3. The inner diameter of the cover 33 is equal to the outer diameter of the vertical tube 11, thereby preventing dust from entering the fork fixing assembly. It should be noted that the height of the internal threaded component 3 is greater than the height of the external threaded component 2. The height of the internal threaded component 3 or the external threaded component 2 is the length of the internal threaded component 3 or the external threaded component 2 along the axial direction of the vertical tube 11.

[0044] The internally threaded component 3 is further provided with a second connecting hole 34 on its periphery. The second connecting hole 34 contains threads and a headless screw 4. After the fork assembly is installed and the internally threaded component 3 is rotated so that its lower end face abuts against the headset, the headless screw 4 is tightened to abut against the externally threaded component 2. The headless screw 4 provides a radial engagement force between the internally threaded component 3 and the externally threaded component 2, preventing the internally threaded component 3 from loosening.

[0045] With the above technical solution, the external threaded part 2 only needs to be fixed to the steer tube 11 of the front fork 1, and the internal threaded part 3, which is sleeved on the outside of the external threaded part 2, can be tightened along the thread. With the headset, the front fork 1 can be rotatably fixed inside the head tube 5 of the frame. This solution can ignore the length of the steer tube.

[0046] This application also discloses an electric bicycle using the aforementioned front fork assembly, such as... Figure 5 As shown, the fork assembly is rotatably fixed within the head tube 5 of the electric bicycle frame via the headset and the fork retaining assembly. A gasket is provided between the fork retaining assembly and the headset.

[0047] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A front fork assembly, characterized in that, include: The fork includes a vertical tube, and the outer wall of the vertical tube is provided with a limiting groove; An external threaded component, which is annular and sleeved on the vertical pipe, is provided with a first connecting hole and a first thread located on the circumference of the external threaded component; A screw is passed through the first connecting hole and inserted into the limiting groove to fix the external threaded part to the vertical pipe; An internal threaded component is sleeved on the outside of the external threaded component. The inner side of the internal threaded component is provided with a second thread that meshes with the first thread. The internal threaded component can be rotated to move axially along the external threaded component so that its lower end face presses against the headset and fixes the fork axially.

2. The fork assembly as described in claim 1, characterized in that, The limiting groove includes an annular groove provided on the surface of the vertical pipe.

3. The fork assembly as described in claim 2, characterized in that, The external threaded component is provided with at least three of the first connecting holes, which are arranged in a circumferential direction.

4. The fork assembly as described in claim 3, characterized in that, The peripheral side of the external threaded component is provided with alternating connecting portions and threaded portions. The connecting portion is provided with the first connecting hole, the threaded portion is arc-shaped, and the surface of the threaded portion is provided with the first thread.

5. The fork assembly as claimed in claim 1, characterized in that, The screws include headless screws.

6. The fork assembly as claimed in claim 1, characterized in that, The internal threaded component is provided with at least one second connecting hole, and a screw is provided in the second connecting hole, which can abut against the external threaded component.

7. The fork assembly as claimed in claim 1, characterized in that, The height of the internal threaded component is greater than the height of the external threaded component.

8. The fork assembly as claimed in claim 7, characterized in that, The upper end of the internally threaded component extends radially inward to form a cover, the cover being annular, and the inner diameter of the cover being equal to the outer diameter of the vertical tube.

9. The fork assembly as claimed in claim 4, characterized in that, Each of the first connecting holes is provided with two screws.

10. An electric bicycle using the front fork assembly according to any one of claims 1-9, characterized in that, The fork assembly is rotatably mounted inside the head tube of the electric bicycle frame via a headset. The external threaded part is fixed at the point where the vertical tube exits the head tube. The internal threaded part is adjusted so that its lower end abuts against the headset, thereby rotatably fixing the fork assembly inside the head tube of the electric bicycle frame.

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