Front fork structure
By designing a front fork structure with a single shock-absorbing connection mechanism, the existing front forks are solved, and the existing vehicle front forks are not balanced and inconvenient to replace are achieved, and the balanced shock absorption effect and convenient replacement are achieved, reducing friction losses.
Patent Information
- Application Number
- CN202420456566.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-03-11
AI Technical Summary
The shock absorption mechanism of the existing vehicle fork has problems such as uneven shock absorption, inconvenient replacement and risk of liquid leakage, resulting in poor shock absorption effect.
A vehicle front fork structure is designed, using a single shock-absorbing connection mechanism, including a standpipe, shock-absorbing connection mechanism and a front fork. The shock-absorbing connection mechanism consists of a fixed end and a mobile end. The fixed end is fixed inside the vertical pipe. The mobile end is connected to the front fork. Components such as sliding connection pipe, spring and ball are used to achieve flexible shock-absorbing effects.
The balanced and convenient replacement of shock absorption effects is achieved, avoiding the problems of different shock absorption capabilities and inconvenient replacement, and at the same time, friction loss is reduced through ball designs.
Smart Images
Figure CN222512283U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of power-assisted bicycles, and particularly relates to a front fork structure of a bicycle. Background Art
[0002] The front end of the power-assisted bicycle is provided with a front fork. In order to reduce the bumps of the power-assisted bicycle during operation, a shock-absorbing mechanism is often required to be provided on the front fork. The existing shock-absorbing mechanism of the front fork has many defects. For example, the common double-spring shock-absorbing mechanism has two spring mechanisms arranged in two front forks. The two shock-absorbing mechanisms are subjected to different wear and tear after long-term use due to the imbalance of actual force and the slight differences in material and structure of the two shock-absorbing mechanisms during the use of the power-assisted bicycle. In the long run, the shock-absorbing capacity of the two shock-absorbing mechanisms is different, and thus the shock-absorbing effect cannot be buffered. Another example is that most of the existing spring shock-absorbing mechanisms are fixed inside the front fork, which is inconvenient to replace. Another example is the use of a hydraulic damping shock-absorbing device, which has the characteristics of large damping force, good shock-absorbing effect, compact structure, and more reasonable force, but requires high sealing, has the risk of leakage, and also has the defect of inconvenient replacement. Utility Model Content
[0003] The utility model aims to provide a front fork structure for solving the above problems.
[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is to design a front fork structure of a bicycle, including a vertical tube, a shock-absorbing connection mechanism and a front fork; the shock-absorbing connection mechanism is divided into a fixed end and a movable end, the fixed end of the shock-absorbing connection mechanism is fixed inside the vertical tube, and the movable end of the shock-absorbing connection mechanism is connected to the front fork;
[0005] A connecting seat is provided on the upper end surface of the front fork; a through hole is provided in the center of the connecting seat, and the movable end of the shock-absorbing connecting mechanism is fixed in the through hole of the connecting seat;
[0006] The shock-absorbing connection mechanism comprises a spring, a fixed sleeve, a screw, a sliding connection pipe, a nut and a connecting screw; the fixed sleeve, the screw and the nut constitute the fixed end of the shock-absorbing connection mechanism; the spring, the sliding connection pipe and the connecting screw constitute the moving end of the shock-absorbing connection mechanism;
[0007] The inner wall of the lower end of the sliding connection pipe is provided with a thread, and a through hole is provided in the center of the connection seat. The connecting screw fixes the lower end of the sliding connection pipe in the through hole in the center of the connection seat;
[0008] A limit step is provided on the inner side of the middle of the sliding connection tube, and a through hole is provided in the center of the limit step, and the limit step separates the interior of the sliding connection tube into two upper and lower chambers; the spring is placed in the chamber above the limit step of the sliding connection tube, and the lower end of the spring contacts the limit step;
[0009] The upper part of the sliding connection pipe is provided with a plurality of vertical grooves; the fixed sleeve is located above the upper part of the sliding connection pipe, the upper end surface of the fixed sleeve forms a limit for limiting the upper end of the spring, and a through hole is left for the screw to pass through, and the lower part of the fixed sleeve is provided with a sliding groove that is offset from the vertical groove of the upper part of the sliding connection pipe, so that the pipe wall between the adjacent vertical grooves of the upper part of the sliding connection pipe can move along the sliding groove of the fixed sleeve;
[0010] The screw passes through the fixed sleeve and the spring, and the lower end of the screw passes through the through hole of the limit step and enters the chamber of the sliding connection pipe below the limit step; the nut is located in the chamber below the limit step of the sliding connection pipe and is threadedly connected with the lower end of the screw;
[0011] The vertical pipe is sleeved on the outside of the fixed sleeve and the sliding connection pipe, and the fixed sleeve is fixed inside the vertical pipe.
[0012] Furthermore, a spring protection sleeve is provided in the chamber above the limit step of the sliding connection pipe, and the spring protection sleeve is sleeved on the outside of the spring.
[0013] Furthermore, a plurality of balls are embedded on the outer side of the tube wall between adjacent vertical grooves on the upper part of the sliding connecting tube.
[0014] Furthermore, a limiting gasket is provided between the screw and the upper end surface of the fixed sleeve; and a nut gasket is provided on the contact surface between the nut and the limiting step of the sliding connecting pipe.
[0015] Furthermore, a sleeve limiting hole is provided on the tube wall between adjacent slide grooves at the lower part of the fixed sleeve; a plurality of sleeve fixing holes are provided on the upper part of the fixed sleeve; a plurality of fixing holes and limiting holes are respectively provided on the tube wall of the vertical pipe, and the fixing holes are located above the limiting holes, and the fixed sleeve is fixed inside the vertical pipe by screwing the fixing screws into the fixing holes of the vertical pipe and the sleeve fixing holes of the fixed sleeve in sequence, and by screwing the limiting screws into the limiting holes of the vertical pipe and the sleeve limiting holes of the fixed sleeve in sequence.
[0016] Furthermore, a limit lock sleeve is provided on the inner wall of the lower end of the vertical pipe; the diameter of the upper part of the sliding connecting pipe located in the vertical pipe and above the limit lock sleeve is slightly larger than the lower part of the sliding connecting pipe exposed from the vertical pipe and below the limit lock sleeve.
[0017] Furthermore, a wiring sleeve is provided; the wiring sleeve is sleeved on the outer wall of the vertical pipe, and a gasket is provided on the contact surface between the wiring sleeve and the vertical pipe; and a guide hole groove is provided on the wiring sleeve.
[0018] The advantages and beneficial effects of the utility model are:
[0019] 1) The utility model adopts a single shock-absorbing connection mechanism, thereby avoiding the defect that the shock-absorbing mechanisms on both sides are not synchronized when double shock-absorbing mechanisms are adopted.
[0020] 2) The shock-absorbing connecting mechanism not only has the function of shock absorption, but also serves as a connecting piece between the vertical tube and the front fork, making the structure more compact.
[0021] 3) The shock-absorbing connection mechanism of the utility model is easy to replace. The fixed sleeve and the vertical pipe can be separated by removing the fixing screws and the limit screws, and the sliding connection pipe and the connection seat can be separated by unscrewing the connection screws, so as to replace the entire shock-absorbing connection mechanism; and the shock-absorbing connection mechanism can also be disassembled by separating the screws and nuts, so as to facilitate the replacement of components such as springs.
[0022] 4) The design of the spring protection sleeve and the ball protects the spring and the sliding connection tube to the greatest extent, reducing the friction loss between the spring and the inner wall of the sliding connection tube and between the outer wall of the sliding connection tube and the inner wall of the vertical tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of the utility model.
[0024] Figure 2 It is an exploded schematic diagram of the utility model.
[0025] Figure 3 This is an exploded diagram of the shock-absorbing connection mechanism (with vertical pipe).
[0026] Figure 4 It is a schematic diagram of the utility model from the front side perspective.
[0027] Figure 5 It is a schematic diagram of section BB.
[0028] Figure 6 It is a schematic diagram of the structure of the shock-absorbing connection mechanism (with a vertical pipe).
[0029] Figure 7 It is a schematic diagram of section AA.
[0030] Figure 8 It is a schematic diagram of the structure of the shock-absorbing connection mechanism (without vertical pipe).
[0031] Among them, vertical tube 1, fixing hole 1-1, limiting hole 1-2, limiting locking sleeve 2, routing sleeve 3, washer 4, spring protection sleeve 5, spring 6, fixed sleeve 7, sleeve fixing hole 7-1, sleeve limiting hole 7-2, limiting gasket 8, screw 9, sliding connecting tube 10, ball 11, nut gasket 12, nut 13, connecting screw 14, connecting seat 15, front fork 16. DETAILED DESCRIPTION
[0032] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example
[0033] like Figure 1 , Figure 2 As shown, a front fork structure of a vehicle comprises a vertical tube 1, a shock absorbing connection mechanism, a connection seat 15 and a front fork 16; the connection seat 15 is clamped on the upper end surface of the front fork 16, and the vertical tube 1 is fixed on the connection seat 15 through the shock absorbing connection mechanism.
[0034] like Figure 3~Figure 8 As shown, the shock-absorbing connection mechanism includes a spring protection cover 5, a spring 6, a fixed sleeve 7, a limit washer 8, a screw 9, a sliding connection pipe 10, a ball 11, a nut washer 12, a nut 13, and a connecting screw 14.
[0035] The inner wall of the lower end of the sliding connection pipe 10 is provided with a thread, and a through hole is provided in the center of the connection seat 15. The connecting screw 14 fixes the lower end of the sliding connection pipe 10 in the through hole in the center of the connection seat 15.
[0036] A limit step is provided on the inner side of the middle part of the sliding connecting tube 10, and a through hole is provided in the center of the limit step. The limit step isolates the interior of the sliding connecting tube 10 into two upper and lower chambers; the spring 6 is placed in the chamber above the limit step of the sliding connecting tube 10, and the lower end of the spring 6 abuts against the limit step. A spring protection cover 5 is also provided in the chamber above the limit step of the sliding connecting tube 10. The spring protection cover 5 is sleeved on the outside of the spring 6 to protect the spring 6 and prevent the spring 6 from directly rubbing against the inner wall of the chamber of the sliding connecting tube 10 during compression and rebound.
[0037] A plurality of vertical grooves are provided on the upper part of the sliding connection tube 10, and a plurality of balls 11 are embedded on the outer side of the tube wall between adjacent vertical grooves; the fixed sleeve 7 is located above the upper part of the sliding connection tube 10, and the upper end surface of the fixed sleeve 7 forms a limit for limiting the upper end of the spring 6, and a through hole is left for the screw 9 to pass through, and a sliding groove is provided at the lower part of the fixed sleeve 7, which is misaligned with the vertical groove on the upper part of the sliding connection tube 10, so that the tube wall between the adjacent vertical grooves on the upper part of the sliding connection tube 10 can move along the sliding groove of the fixed sleeve 7.
[0038] A sleeve limiting hole 7 - 2 is provided on the tube wall between adjacent slide grooves at the lower part of the fixed sleeve 7 .
[0039] The upper portion of the fixed sleeve 7 is provided with a plurality of sleeve fixing holes 7 - 1 .
[0040] The upper end surface of the fixed sleeve 7 is covered with a limiting gasket 8, and the screw 9 passes through the limiting gasket 8, the fixed sleeve 7 and the spring 6 in sequence. The lower end of the screw 9 passes through the through hole of the limiting step and enters the cavity of the sliding connecting tube 10 below the limiting step; the nut 13 is located in the cavity below the limiting step of the sliding connecting tube 10 and is threadedly connected to the lower end of the screw 9, and a nut gasket 12 can be set on the contact surface between the nut 13 and the limiting step.
[0041] The vertical pipe 1 is sleeved on the outside of the fixed sleeve 7 and the sliding connecting pipe 10. A plurality of fixing holes 1-1 and limiting holes 1-2 are respectively provided on the tube wall of the vertical pipe 1. The fixing holes 1-1 are located above the limiting holes 1-2. The fixing screws (not shown in the figure) are screwed into the fixing holes 1-1 of the vertical pipe 1 and the sleeve fixing holes 7-1 of the fixed sleeve 7 in sequence, and the limiting screws (not shown in the figure) are screwed into the limiting holes 1-2 of the vertical pipe 1 and the sleeve limiting holes 7-2 of the fixed sleeve 7 in sequence, so as to fix the fixed sleeve 7 inside the vertical pipe 1.
[0042] At the same time, when the sliding connection tube 10 moves relative to the fixed sleeve 7, the limit screw limits the maximum upward distance of the sliding connection tube 10, and the length of the screw 9 limits the maximum downward distance of the sliding connection tube 10.
[0043] A limit lock sleeve 2 is provided on the inner wall of the lower end of the vertical pipe 1; the diameter of the upper part of the sliding connecting pipe 10 located in the vertical pipe 1 and above the limit lock sleeve 2 is slightly larger than the lower part of the sliding connecting pipe 10 exposed from the vertical pipe 1 and below the limit lock sleeve 2, and the limit lock sleeve 2 further limits the downward movement range of the sliding connecting pipe 10.
[0044] The wiring sleeve 3 is sleeved on the outer wall of the vertical tube 1, and a gasket 4 is arranged on the contact surface between the wiring sleeve 3 and the vertical tube 1; the wiring sleeve 3 is provided with a guide hole groove for the wiring harness including brake wires to pass through.
[0045] When the vehicle runs on a bumpy road, the front fork 16 drives the sliding connecting tube 10 to move up and down along the fixed sleeve 7 in the vertical tube 1. During this process, the spring 6 compresses and rebounds to play a buffering role.
[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A front fork structure, characterized in that: It includes a vertical tube, a shock-absorbing connection mechanism and a front fork; the shock-absorbing connection mechanism is divided into a fixed end and a movable end, the fixed end of the shock-absorbing connection mechanism is fixed inside the vertical tube, and the movable end of the shock-absorbing connection mechanism is connected to the front fork; A connecting seat is provided on the upper end surface of the front fork; a through hole is provided in the center of the connecting seat, and the movable end of the shock-absorbing connecting mechanism is fixed in the through hole of the connecting seat; The shock-absorbing connection mechanism comprises a spring, a fixed sleeve, a screw, a sliding connection pipe, a nut and a connecting screw; the fixed sleeve, the screw and the nut constitute the fixed end of the shock-absorbing connection mechanism; the spring, the sliding connection pipe and the connecting screw constitute the moving end of the shock-absorbing connection mechanism; The inner wall of the lower end of the sliding connection pipe is provided with a thread, and a through hole is provided in the center of the connection seat. The connecting screw fixes the lower end of the sliding connection pipe in the through hole in the center of the connection seat; A limit step is provided on the inner side of the middle of the sliding connection tube, and a through hole is provided in the center of the limit step, and the limit step separates the interior of the sliding connection tube into two upper and lower chambers; the spring is placed in the chamber above the limit step of the sliding connection tube, and the lower end of the spring contacts the limit step; The upper part of the sliding connection pipe is provided with a plurality of vertical grooves; the fixed sleeve is located above the upper part of the sliding connection pipe, the upper end surface of the fixed sleeve forms a limit for limiting the upper end of the spring, and a through hole is left for the screw to pass through, and the lower part of the fixed sleeve is provided with a sliding groove that is offset from the vertical groove of the upper part of the sliding connection pipe, so that the pipe wall between the adjacent vertical grooves of the upper part of the sliding connection pipe can move along the sliding groove of the fixed sleeve; The screw passes through the fixed sleeve and the spring, and the lower end of the screw passes through the through hole of the limit step and enters the chamber of the sliding connection pipe below the limit step; the nut is located in the chamber below the limit step of the sliding connection pipe and is threadedly connected with the lower end of the screw; The vertical pipe is sleeved on the outside of the fixed sleeve and the sliding connection pipe, and the fixed sleeve is fixed inside the vertical pipe.
2. A front fork structure according to claim 1, characterized in that: A spring protection sleeve is also provided in the chamber above the limit step of the sliding connection pipe, and the spring protection sleeve is sleeved on the outside of the spring.
3. A front fork structure according to claim 1, characterized in that: A plurality of balls are inlaid on the outer side of the tube wall between the adjacent vertical grooves on the upper part of the sliding connection tube.
4. A front fork structure according to claim 1, characterized in that: A limiting gasket is arranged between the screw and the upper end surface of the fixed sleeve; a nut gasket is arranged on the contact surface between the nut and the limiting step of the sliding connection pipe.
5. The front fork structure of a vehicle according to claim 1, characterized in that: A sleeve limiting hole is provided on the tube wall between adjacent slide grooves at the lower part of the fixed sleeve; a plurality of sleeve fixing holes are provided on the upper part of the fixed sleeve; a plurality of fixing holes and limiting holes are respectively provided on the tube wall of the vertical pipe, and the fixing holes are located above the limiting holes, and the fixed sleeve is fixed inside the vertical pipe by screwing the fixing screws into the fixing holes of the vertical pipe and the sleeve fixing holes of the fixed sleeve in sequence, and by screwing the limiting screws into the limiting holes of the vertical pipe and the sleeve limiting holes of the fixed sleeve in sequence.
6. A front fork structure according to claim 1, characterized in that: A limit lock sleeve is provided on the inner wall of the lower end of the vertical pipe; the diameter of the upper part of the sliding connecting pipe located in the vertical pipe and above the limit lock sleeve is slightly larger than the lower part of the sliding connecting pipe exposed from the vertical pipe and below the limit lock sleeve.
7. A front fork structure according to claim 1, characterized in that: A wiring sleeve is also provided; the wiring sleeve is sleeved on the outer wall of the vertical pipe, and a gasket is provided on the contact surface between the wiring sleeve and the vertical pipe; and a guide hole groove is provided on the wiring sleeve.