Folding bicycle front fork device capable of flexibly adjusting height

Abstract

The utility model discloses a folding bicycle front fork device capable of flexibly adjusting the height, and relates to the technical field of bicycles. The two supporting sleeves are arranged at the lower end of the fork barrel in a sliding and sleeving mode, and the fork feet are fixedly arranged on one sides of the outer ring walls of the supporting sleeves. The two rotating shafts are respectively screwed and arranged at the bottom of the supporting sleeve in a penetrating manner through bearings; a screw rod is fixedly arranged at the upper end of the rotating shaft, the screw rod is sleeved with a screw pipe in a screwed connection mode through threads, and the upper end of the screw pipe is connected with the bottom end of the fork barrel; the two main reset springs are fixedly arranged on the inner wall of the vertical end of the supporting frame. The two moving rods are arranged on the sides, away from the fork feet, of the supporting sleeves in a penetrating mode correspondingly, and the inner ends of the moving rods are inserted into the rotating shafts. A round handle is fixedly arranged at the outer end of the moving rod, and the outer side wall of the round handle is connected with the main reset spring. The fork barrel is driven through a simple thread transmission structure, the distance between the fork bridge and the fork feet is changed, tires of different specifications can be installed, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, specifically to a folding bicycle front fork device with adjustable height. Background Technology

[0002] The bicycle front fork is a crucial component located at the front of the bicycle structure, connecting the handlebars to the front wheel and responsible for steering and shock absorption. Currently, the height of the bicycle front fork itself cannot be directly adjusted. During installation, it is necessary to select a front fork that matches the tire specifications, which increases production costs and urgently needs improvement. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a folding bicycle front fork device with a simple structure, reasonable design, and convenient use that allows for flexible height adjustment. It uses a simple threaded transmission structure to drive the fork barrel, thereby changing the distance between the fork bridge and the fork legs to accommodate different tire sizes and reduce production costs.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: it includes a fork shoulder, a fork barrel, fork feet, a stroke tube, and a fork bridge. An upper tube is provided on the upper side of the fork shoulder, a fork bridge is provided on the lower side of the fork shoulder, and fork barrels are arranged opposite each other on the lower side of the fork bridge. The stroke tube passes through the fork barrel, and the upper end of the stroke tube is located inside the fork shoulder. Fork feet are provided on the lower side of the fork barrel; it also includes:

[0005] The support sleeve consists of two sleeves, which are slidably fitted onto the lower end of the fork barrel, and the fork feet are fixedly mounted on one side of the outer ring wall of the support sleeve.

[0006] Two rotating shafts are screwed through the bottom of the support sleeve via bearings; a screw is fixedly installed at the upper end of the rotating shaft, and a screw tube is screwed onto the screw via threads, with the upper end of the screw tube connected to the bottom end of the fork barrel.

[0007] The support frame consists of two frames, each fixedly mounted on the outside of the support sleeve.

[0008] Two main return springs are fixedly installed on the inner wall of the vertical end of the support frame.

[0009] The movable rods are two in number, each passing through the support sleeve on the side away from the fork foot, and the inner end of the movable rod is inserted into the rotating shaft; the outer end of the movable rod is fixedly provided with a round handle, and the outer wall of the round handle is connected to the main return spring.

[0010] The convex handles are two in number and are respectively fixedly installed at the bottom of the corresponding round handles;

[0011] Through the above technical solution design, the protruding shank is manually squeezed to compress the main return spring. At this time, the moving rod is disengaged from the rotating shaft. By manually rotating the bottom end of the rotating shaft, the screw can be rotated, which drives the screw tube through the thread, causing the fork barrel to move and changing the distance between the fork bridge and the fork feet. After adjustment, the hand squeezing the protruding shank is released, and the main return spring will spring back to its original position, driving the moving rod to insert into the rotating shaft to fix the rotating shaft.

[0012] As a further improvement of this utility model, a protrusion is provided on the upper side of the movable rod, and the protrusion is located inside the support sleeve; a secondary return spring is provided on the outer wall of the protrusion, and the other end of the secondary return spring is connected to the inner ring wall of the support sleeve.

[0013] Through the above technical solution design, the protrusion and the secondary return spring are designed to prevent the moving rod from detaching from the support sleeve when it moves.

[0014] As a further improvement of this utility model, a guide groove is provided in the inner wall of the support sleeve, and the guide groove is located on the upper side of the support frame. A guide block is fixedly provided on the side wall of the outer ring wall of the fork bucket, and the guide block is slidably located in the guide groove.

[0015] The above technical solution guides the movement of the forklift bucket.

[0016] As a further improvement of this utility model, a sliding block is fixedly provided on the upper side of the round handle, and the upper side of the sliding block is slidably disposed with the inner top surface of the support frame; a threaded rod is inserted into the vertical end of the support frame by threaded connection, and the threaded rod is disposed in the main return spring; a bar is fixedly provided at the inner end of the threaded rod, and a positioning platform is fixedly provided at the inner end of the bar, and the positioning platform is inserted into the sliding block.

[0017] With the above technical solution, before manually pressing the convex shank, the threaded rod is manually rotated to move the positioning table away from the sliding block until it is disengaged from the support frame. When the convex shank is manually pressed, the sliding block can be guided. After adjustment, the threaded rod is manually rotated and inserted into the support frame, and the threaded rod is manually rotated until the positioning table is firmly inserted into the sliding block to strengthen the stability of the sliding block.

[0018] As a further improvement of this utility model, a limiting block is fixedly provided on the inner top surface of the support frame, and the limiting block is located between the support sleeve and the round handle. The moving rod slides through the limiting block via a sliding pair.

[0019] The above technical solution design guides the movement of the moving rod, and the limiting block limits the circular handle.

[0020] As a further improvement of this utility model, a connector is fixedly provided at the bottom of the support sleeve, and an indicator head is provided at the bottom of the rotating shaft.

[0021] With the above technical solution design, when the indicator head comes into contact with the connector, it indicates that the rotating shaft has rotated one revolution.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. Add a support sleeve to the underside of the fork barrel and set a threaded drive in the support sleeve to drive the fork barrel, thereby changing the distance between the fork bridge and the fork feet, so as to be suitable for installation and use with different specifications of tires;

[0024] 2. After manually rotating the rotating shaft to achieve the purpose of height adjustment, the main return spring returns to its original position, allowing the moving rod to be inserted into the rotating shaft, thereby fixing the rotating shaft and achieving the purpose of height stability.

[0025] 3. By rotating the threaded rod, the positioning table is inserted into the sliding block, which strengthens the stability of the round handle and prevents external factors from misleading the operation of pressing the main return spring by touching the convex handle. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a schematic diagram of the internal structure of the support sleeve in this utility model.

[0028] Figure 3 This is a schematic diagram of the structure connecting the support and the forklift bucket in this utility model.

[0029] Figure 4 yes Figure 3 Enlarged view of part A.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Fork shoulder, 2. Fork barrel, 3. Fork foot, 4. Stroke tube, 5. Fork bridge, 6. Support sleeve, 7. Rotating shaft, 8. Screw, 9. Screw tube, 10. Support frame, 11. Main return spring, 12. Moving rod, 13. Round handle, 14. Protruding handle, 15. Protrusion, 16. Secondary return spring, 17. Guide block, 18. Sliding block, 19. Limiting block, 20. Connecting joint, 21. Indicator head, 22. Threaded rod, 23. Bar rod, 24. Positioning table. Detailed Implementation

[0032] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0033] Please see Figures 1-4 In this embodiment, it includes a fork shoulder 1, a fork barrel 2, a fork foot 3, a stroke tube 4, and a fork bridge 5. An upper tube is provided on the upper side of the fork shoulder 1, a fork bridge 5 is provided on the lower side of the fork bridge 5, and a fork barrel 2 is provided on the lower side of the fork bridge 5. The stroke tube 4 passes through the fork barrel 2, and the upper end of the stroke tube 4 is provided inside the fork shoulder 1. A fork foot 3 is provided on the lower side of the fork barrel 2.

[0034] Also includes:

[0035] Support sleeve 6, there are two support sleeves 6, which are slidably sleeved on the lower end of the fork barrel 2, and the fork feet 3 are fixedly set on one side of the outer ring wall of the support sleeve 6; a guide groove is opened in the ring wall of the support sleeve 6, and the guide groove is set on the upper side of the support frame 10; a guide block 17 is fixedly set on the side wall of the outer ring wall of the fork barrel 2, and the guide block 17 is slidably set in the guide groove.

[0036] Two rotating shafts 7 are screwed through the bottom of the support sleeve 6 via bearings; a screw rod 8 is fixedly installed at the upper end of the rotating shaft 7, and a screw tube 9 is screwed onto the screw rod 8 via threads, the upper end of the screw tube 9 being connected to the bottom end of the fork barrel 2; a butt joint 20 is fixedly installed at the bottom of the support sleeve 6, and an indicator head 21 is installed at the bottom end of the rotating shaft 7;

[0037] Support frame 10, there are two support frames 10, which are respectively fixedly installed on the outside of support sleeve 6;

[0038] Two main return springs 11 are fixedly installed on the inner wall of the vertical end of the support frame 10.

[0039] Two movable rods 12 are respectively inserted into the side of the support sleeve 6 away from the fork 3, and the inner end of the movable rod 12 is inserted into the rotating shaft 7; a round handle 13 is fixedly provided at the outer end of the movable rod 12, and the outer wall of the round handle 13 is connected to the main return spring 11; a protrusion 15 is provided on the upper side of the movable rod 12, and the protrusion 15 is provided inside the support sleeve 6; a secondary return spring 16 is provided on the outer wall of the protrusion 15, and the other end of the secondary return spring 16 is connected to the inner ring wall of the support sleeve 6;

[0040] Two protruding handles 14 are fixedly installed at the bottom of the corresponding round handles 13 respectively; a limiting block 19 is fixedly installed on the inner top surface of the support frame 10, and the limiting block 19 is installed between the support sleeve 6 and the round handle 13; the moving rod 12 is slidably inserted into the limiting block 19 through a sliding pair.

[0041] Through the above technical solution design, the protruding shank 14 is manually squeezed to compress the main return spring 11. At this time, the moving rod 12 is disengaged from the rotating shaft 7. By manually rotating the bottom end of the rotating shaft 7, the screw 8 can be rotated, which drives the screw tube 9 through the thread, causing the fork barrel 2 to move and changing the distance between the fork bridge 5 and the fork foot 3. After adjustment, the hand squeezing the protruding shank 14 is released, and the main return spring 11 returns to its original position, driving the moving rod 12 to insert into the interior of the rotating shaft 7 to fix the rotating shaft 7. Example

[0042] Please see Figures 1-4 Based on Embodiment 1, a further improvement is made: a sliding block 18 is fixedly provided on the upper side of the round handle 13, and the upper side of the sliding block 18 is slidably disposed with respect to the inner top surface of the support frame 10; a threaded rod 22 is screwed into the vertical end of the support frame 10, and the threaded rod 22 is disposed in the main return spring 11; a bar 23 is fixedly provided at the inner end of the threaded rod 22, and a positioning platform 24 is fixedly provided at the inner end of the bar 23, and the positioning platform 24 is inserted into the sliding block 18;

[0043] With the above technical solution design, before manually pressing the convex handle 14, the threaded rod 22 is manually rotated to drive the positioning table 24 away from the sliding block 18 until it is disengaged from the support frame 10; when the convex handle 14 is manually pressed, the sliding block 18 can be guided; after adjustment, the threaded rod 22 is manually rotated and inserted into the support frame 10, and the threaded rod 22 is manually rotated until the positioning table 24 is tightly inserted into the sliding block 18 to strengthen the stability of the sliding block 18.

[0044] When using this utility model, the working principle is as follows: First, manually rotate the threaded rod 22 to move the positioning platform 24 away from the sliding block 18 until it is disengaged from the support frame 10; manually squeeze the convex handle 14, which guides the sliding block 18 and compresses the main return spring 11. At this time, the moving rod 12 is disengaged from the rotating shaft 7, and the secondary return spring 16 is compressed to limit the convex block 15; manually rotate the bottom end of the rotating shaft 7 to rotate the screw 8, which drives the screw tube 9 through the thread, causing the fork barrel 2 to move and change the distance between the fork bridge 5 and the fork foot 3; after adjustment, release the hand that squeezes the convex handle 14. At this time, the main return spring 11 and the secondary return spring 16 simultaneously rebound and reset, driving the moving rod 12 to insert into the interior of the rotating shaft 7 to fix the rotating shaft 7; finally, manually rotate the threaded rod 22 to insert it into the support frame 10, and manually rotate the threaded rod 22 until the positioning platform 24 is tightly inserted into the sliding block 18 to reinforce the stability of the sliding block 18.

[0045] Compared with the prior art, the beneficial effects of this utility model are:

[0046] 1. Add a support sleeve 6 to the lower side of the fork barrel 2, and set a threaded drive in the support sleeve 6 to drive the fork barrel 2, thereby changing the distance between the fork bridge 5 and the fork legs 3, so as to be suitable for installation and use of tires of different specifications.

[0047] 2. After manually rotating the rotating shaft 7 to achieve the purpose of height adjustment, the main return spring 11 returns to its original position, causing the moving rod 12 to be inserted into the rotating shaft 7, thereby fixing the rotating shaft 7 and achieving the purpose of height stability.

[0048] 3. By rotating the threaded rod 22, the positioning table 24 is inserted into the sliding block 18 to strengthen the stability of the round handle 13 and prevent external factors from misleading the contact of the protruding handle 14 to squeeze the main return spring 11.

[0049] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A height-adjustable folding bicycle front fork device, comprising a fork shoulder (1), a fork tube (2), a fork foot (3), a stroke tube (4), and a fork bridge (5), wherein an upper tube is provided on the upper side of the fork shoulder (1), a fork bridge (5) is provided on the lower side of the fork shoulder (1), and fork tubes (2) are provided on the lower side of the fork bridge (5) in opposite directions, the fork tube (2) is provided with the stroke tube (4), and the upper end of the stroke tube (4) is provided inside the fork shoulder (1), and fork foot (3) is provided on the lower side of the fork tube (2). Its features are, It also includes: Support sleeve (6), there are two support sleeves (6), which are slidably sleeved on the lower end of the fork barrel (2), and the fork feet (3) are fixedly set on one side of the outer ring wall of the support sleeve (6); Rotating shaft (7), there are two rotating shafts (7), which are respectively screwed through the bottom of the support sleeve (6) by bearings; a screw (8) is fixedly installed at the upper end of the rotating shaft (7), and a screw tube (9) is screwed on the screw (8) by thread, and the upper end of the screw tube (9) is connected to the bottom end of the fork barrel (2); Support frame (10), there are two support frames (10), which are respectively fixedly installed on the outside of the support sleeve (6); Two main return springs (11) are fixedly installed on the inner wall of the vertical end of the support frame (10). The movable rod (12) consists of two rods, which are respectively inserted into the support sleeve (6) on the side away from the fork foot (3), and the inner end of the movable rod (12) is inserted into the rotating shaft (7); the outer end of the movable rod (12) is fixedly provided with a round handle (13), and the outer side wall of the round handle (13) is connected to the main return spring (11); Two protruding handles (14) are fixedly installed at the bottom of the corresponding round handles (13).

2. The height-adjustable folding bicycle fork device according to claim 1, characterized in that: The upper side of the moving rod (12) is provided with a protrusion (15), and the protrusion (15) is located inside the support sleeve (6); a secondary return spring (16) is provided on the outer wall of the protrusion (15), and the other end of the secondary return spring (16) is connected to the inner ring wall of the support sleeve (6).

3. The height-adjustable folding bicycle front fork device according to claim 1, characterized in that: The support sleeve (6) has a guide groove in its annular wall and the guide groove is located on the upper side of the support frame (10). A guide block (17) is fixedly installed on the side wall of the outer annular wall of the fork barrel (2) and the guide block (17) is slidably installed in the guide groove.

4. The height-adjustable folding bicycle front fork device according to claim 1, characterized in that: A sliding block (18) is fixedly provided on the upper side of the round handle (13), and the upper side of the sliding block (18) is slidably provided with the inner top surface of the support frame (10); a threaded rod (22) is inserted into the vertical end of the support frame (10) by threaded connection, and the threaded rod (22) is provided in the main return spring (11); a bar (23) is fixedly provided at the inner end of the threaded rod (22), and a positioning table (24) is fixedly provided at the inner end of the bar (23), and the positioning table (24) is inserted into the sliding block (18).

5. The height-adjustable folding bicycle front fork device according to claim 1, characterized in that: A limiting block (19) is fixedly provided on the inner top surface of the support frame (10), and the limiting block (19) is located between the support sleeve (6) and the round handle (13). The moving rod (12) slides through the limiting block (19) via a sliding pair.

6. The height-adjustable folding bicycle front fork device according to claim 1, characterized in that: The bottom of the support sleeve (6) is fixedly provided with a connector (20), and the bottom end of the rotating shaft (7) is provided with an indicator head (21).

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