Bicycle front fork bowl assembly

Abstract

The bicycle front fork bowl assembly comprises a lower bowl piece and an upper bowl piece which are coaxially arranged, and the lower bowl piece is connected to a front fork steering tube in a sleeving mode and is in interference fit with a head tube; a handle vertical pipe is clamped between the lower bowl piece and the upper bowl piece, an axial through hole is formed in the top end of the upper bowl piece, a sunflower hanging core is assembled in the through hole, and a fastening screw is connected into the sunflower hanging core in a threaded mode. The upper bowl piece is provided with a sunflower hanging core, the end face of the top end of the upper bowl piece is covered with a hanging core cover, the hanging core cover is limited between the sunflower hanging core and the fastening screw, and is characterized in that the periphery of a nut of the fastening screw is sleeved with a dust cover, the dust cover is provided with an embedding cavity allowing the nut to be inserted therein, and an unlocking piece is detachably connected in the embedding cavity; the unlocking piece corresponds to the screw groove shape of the screw; and when the nut is inserted into the embedding groove, the unlocking piece is inserted into the screw groove of the nut, and the device has the effects that the screw can be protected, and meanwhile, the damaged screw can be conveniently and rapidly disassembled and assembled.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bicycles, in particular to a bicycle front fork bowl assembly. BACKGROUND

[0002] At present, the bicycle front fork bowl assembly is the medium for connecting the frame and the front fork, which can make the connection of the front fork and the frame more perfect and the stress more balanced. The bicycle front fork bowl assembly is usually composed of a bearing, a washer and a top cover screw.

[0003] For the related technology in the above, there are still defects: the bicycle front fork bowl assembly will loosen after long-term use. When part of the bicycle front fork bowl assembly loosens, a gap will appear between the washers. At this time, the dust or stones on the road are easy to get stuck between the washers and affect the normal use of the washers during the user's riding process, and the smoothness of the handlebar during use is also affected.

[0004] In addition, the top cover screw of part of the bicycle front fork bowl assembly is directly exposed outside. After long-term use of part of the mountain bike, the top of the top cover screw is easy to accumulate a lot of mud, so that the subsequent operation of tightening the top cover screw and repairing the front fork bowl assembly is affected. CONTENT OF THE UTILITY MODEL

[0005] In order to protect the screw and facilitate the quick disassembly and installation of the damaged screw, the present application provides a bicycle front fork bowl assembly.

[0006] The bicycle front fork bowl assembly provided by the present application adopts the following technical scheme:

[0007] A bicycle front fork bowl assembly, comprising a coaxially arranged lower bowl piece and an upper bowl piece, the lower bowl piece is sleeved on the front fork steering pipe and is in interference fit with the head tube; a handlebar riser pipe is clamped between the lower bowl piece and the upper bowl piece, an axial through hole is arranged at the top end of the upper bowl piece, a sunflower hanging core is arranged in the through hole, a fastening screw is threadedly connected in the sunflower hanging core; a hanging core cover is arranged on the top end face of the upper bowl piece, the hanging core cover is limited between the sunflower hanging core and the fastening screw, a dust cover is sleeved on the outer periphery of the nut of the fastening screw, the dust cover is provided with a fitting cavity for inserting the nut, a unlocking piece is detachably connected in the fitting cavity, the unlocking piece corresponds to the screw groove of the screw; when the nut is inserted into the fitting groove, the unlocking piece is inserted into the screw groove of the nut.

[0008] By adopting the above technical scheme, the combination design of the dust cover and the unlocking piece realizes the functions of quick disassembly and dust protection; the fitting cavity structure ensures the accurate alignment of the dust cover and the nut, avoiding the tool slipping; the corresponding design of the unlocking piece and the screw groove ensures the effective transmission of torque and prevents the screw head from being worn.

[0009] Optionally, the dust cover comprises a cover body and two flip covers symmetrically pivoted to two sides of the cover body, the two flip covers form a 180° rotation pair with the cover body through a pivot; the flip cover has an unfolded unlocking station forming a 180° angle with the cover body and a folded protection station abutting with the outer wall of the cover body.

[0010] By adopting the above technical scheme, the rotation pair realizes accurate positioning of the flip cover, ensures that the operation angle meets the ergonomics, the coplanar unfolding design forms a stable operation platform, improves the uniformity of screw disassembly force, the folding abutting structure maximally reduces the outer contour size of the assembly, the symmetric pivoting design balances the stress on both sides to avoid unilateral wear.

[0011] Optionally, an arc-shaped groove is formed in the outer wall of the cover body, symmetrically shaped sliding blocks are formed on the two side walls of the flip cover, the sliding blocks can slide into the arc-shaped groove, when the flip cover reaches the unlocking station or the protection station, the sliding blocks form a clamping fit with the arc-shaped groove; the inner wall of the arc-shaped groove is integrally formed with a limiting round block.

[0012] By adopting the above technical scheme, the cooperation of the arc-shaped sliding groove and the sliding block provides mechanical guidance to ensure the accurate movement track of the flip cover; the limiting round block forms a tactile feedback to clearly indicate the completion state of the station switching; the clamping fit produces mechanical self-locking to prevent accidental switching of the station caused by riding vibration; the integrally formed structure enhances the structural strength of the component to avoid loosening of the connecting piece.

[0013] Optionally, a protruding part matching the shape of the screw groove of the screw is formed at one end of the unlocking piece, and a threaded connecting part for rotationally connecting with the cover body is formed at the other end of the unlocking piece.

[0014] By adopting the above technical scheme, the shape-matched protruding part realizes zero-gap fit, the axially extended threaded part forms a double-locking structure to prevent the unlocking piece from being rotated out, the reverse thread design produces a loosening effect, and an interlocking mechanism is formed with the fastening screw.

[0015] Optionally, an elastic waterproof membrane is embedded at the pivot connection between the flip cover and the cover body, the waterproof membrane extends along the pivot axis to form an annular sealing ring, and the waterproof membrane is compressed to produce radial expansion when the flip cover is in the protection station, thereby forming an interference fit with the pivot.

[0016] By adopting the above technical scheme, the elastic waterproof membrane dynamically compensates for the assembly gap, adapts to thermal expansion and contraction at different temperatures, the radial expansion sealing realizes three-dimensional protection at the rotating shaft, prevents liquid capillary penetration, the annular sealing ring forms multiple waterproof barriers to ensure long-term sealing reliability.

[0017] Optionally, sealing teeth are arranged on the inner edge of the flip cover and the joint surface of the cover body, the sealing teeth interlock, and a silica gel sealing layer is filled between the sealing teeth.

[0018] By adopting the technical scheme, the wave-shaped sealing teeth form a labyrinth seal, effectively block the mud water invasion path, the silica gel filling layer realizes full coverage sealing of micro gaps, the meshing sealing structure generates a self-enhancing sealing effect under pressure, the complementary elastic material and rigid structure take into account the sealing property and durability.

[0019] To sum up, the beneficial technical effects of the present application are: by adopting the dust cover structure protection, waterproof protection, ensuring the cleanliness and dryness of the screw, and also by using the unlocking piece, the user can conveniently replace the screw, and can replace the unlocking piece of corresponding size and specification according to the groove type of different bolts. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0021] Figure 2 is an exploded structure schematic diagram highlighting the sunflower hanging core and the fastening screw in the embodiment of the present application.

[0022] Figure 3 is a schematic diagram of the internal structure section of the dust cover in the embodiment of the present application.

[0023] Figure 4 is a schematic diagram of the structure of the flip cover in the unlocking position in the embodiment of the present application.

[0024] Reference signs: 1, lower bowl piece; 2, upper bowl piece; 3, head tube; 4, handlebar riser; 5, axial through hole; 6, sunflower hanging core; 7, fastening screw; 8, hanging core cover; 9, dust cover; 10, fitting cavity; 11, unlocking piece; 12, cover body; 13, flip cover; 14, arc-shaped groove; 15, sliding block; 16, limiting round block; 17, protruding part; 18, threaded connection part; 19, elastic waterproof film; 20, sealing tooth. DETAILED DESCRIPTION

[0025] The following will be described in detail in combination with the accompanying Figures 1-4 The present application will be further described in detail.

[0026] The embodiment of the present application discloses a bicycle front fork bowl assembly. Referring to Figure 1 , Figure 2 The bicycle front fork bowl assembly comprises a layered assembly design, mainly including a lower bowl piece 1, an upper bowl piece 2 and a protection system arranged coaxially. The inner hole diameter of the lower bowl piece 1 is in interference fit with the outer diameter of the front fork steering tube. The upper bowl piece 2 forms an axial clamping space with the top end of the lower bowl piece 1 through the bottom annular flange, and the handlebar riser 4 is embedded in the space. The clamping pressure is adjusted by the pre-tightening force of the sunflower hanging core 6, so as to realize the assembly combination of the head tube 3, the handlebar riser 4 and the front fork steering tube.

[0027] The upper bowl 2 top end is provided with an axial through hole 5, and a sunflower hanging core 6 is assembled in the hole. The hanging core adopts a split structure, including an upper expansion section and a lower threaded section, and a fastening screw 7 is installed in the threaded section and is in threaded connection with the threaded section. The nut of the fastening screw 7 is surface nickel-plated, and a standard internal hexagonal driving groove is formed in the top of the nut.

[0028] As shown in Figure 2 , Figure 3 and Figure 4 , a dust cover 9 is sleeved on the outer periphery of the nut of the screw, and the dust cover 9 can be injection molded from plastic and includes a main cover body 12 and flip covers 13 symmetrically arranged on both sides of the cover body 12. A fitting cavity 10 is formed in the cover body 12 for inserting the nut of the fastening screw 7, and the inner diameter of the fitting cavity 10 is slightly larger than the outer diameter of the nut, forming an assembly gap. The top of the fitting cavity 10 is detachably connected to an unlocking piece 11, and the end of the unlocking piece 11 can be adapted to the screw groove type of the nut for threaded connection.

[0029] As shown in Figure 2 , Figure 3 and Figure 4 , one end of the unlocking piece 11 is formed with a protruding part 17 matched with the shape of the screw groove of the fastening screw 7, and the other end is axially formed with a threaded connection part 18 matched with the screw body 12. Users can replace different specifications and different types of screwdriver bits according to different screws used.

[0030] As shown in Figure 2 , Figure 3 and Figure 4 , the flip covers 13 are arranged on both sides of the cover body 12 and are in 180° rotational pairs with the cover body 12 through pivots located on both sides of the cover body 12. Anti-dropping springs (not shown in the figure) are arranged at both ends of the pivots, and the flip covers 13 can be accurately rotated by 180° around the pivots. According to different rotational positions of the flip covers 13, the flip covers 13 have an unlocking position coplanar with the cover body 12 to form a 180° angle, and a protection position folded to be attached to the outer wall of the cover body 12.

[0031] As shown in Figure 2 , Figure 3 and Figure 4 , when the flip covers 13 are turned to the unlocking position, users can press the inner side walls of the flip covers 13 by fingers to facilitate the rotation of the fastening screw 7 through the unlocking piece 11 arranged on the cover body 12.

[0032] When the flip covers 13 are turned to the protection position, the flip covers 13 form an umbrella surface with the cover body 12 to shield the fastening screw 7, thereby protecting the fastening screw 7 and preventing rain or dust from adhering to the nut of the fastening screw 7, so as to ensure the cleanliness of the fastening screw 7.

[0033] As Figure 2 , Figure 3 and Figure 4 shown, two arc-shaped grooves are symmetrically formed on the outer side wall of the cover body 12 of the dust cover 9, the arc centers of the arc-shaped grooves coincide with the pivot axis of the flip cover 13, and the two side walls of the flip cover 13 are also symmetrically formed with sliding blocks 15 that can slide into the arc-shaped grooves 14. During the movement of the flip cover 13 from the unlocking position to the protection position, the sliding blocks 15 move towards the direction of the arc-shaped grooves 14. Until the flip cover 13 completely enters the protection position, the sliding blocks 15 form a clamping fit with the arc-shaped grooves 14. The inner side wall of the arc-shaped groove 14 is also integrally formed with a limiting round block 16, which can form an interference fit with the sliding blocks 15 that enter the arc-shaped groove 14, thereby further enhancing the stability of the flip cover 13 when it is in the protection position.

[0034] An elastic waterproof film 19 is embedded at the pivot connection between the flip cover 13 and the cover body 12, which extends along the pivot axis to form a ring-shaped sealing ring. When the flip cover 13 is in the protection position, the radial expansion caused by the compression of the waterproof film ensures that the flip cover 13 and the cover body 12 form an interference fit seal, thereby reducing the risk of water seeping into the protective cover through the gap between the flip cover 13 and the cover body 12.

[0035] As Figure 2 , Figure 3 and Figure 4 shown, a sealing tooth 20 is also provided on the inner edge of the flip cover 13 and the interface with the cover body 12, and a silica gel sealing layer is filled between the sealing teeth 20. The structure of the sealing tooth 20 can effectively assist the rotation of the flip cover 13 and limit the rotation limit of the flip cover 13, so that the flip cover 13 can not be rotated excessively when it is turned to the protection position.

[0036] The implementation principle of the front fork bowl assembly disclosed in the embodiments of the present application is that the user can rotate the flip cover 13 to the unlocking position to facilitate subsequent tightening of the fastening screw 7 by the unlocking piece 11. Since the shape of the screw connection part of the unlocking piece 11 is the same as the type of the screw cap screw groove of the fastening screw 7, the user only needs to hold the flip cover 13 to rotate the protective cover, thereby achieving the effect of being able to rotate the fastening screw 7 without using special tools in the wild.

[0037] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made in terms of structure, shape and principle based on the present application should be covered within the protection scope of the present application.

Claims

1. A bicycle front fork crown assembly, comprising coaxially arranged lower crown member (1) and upper crown member (2), the lower crown member (1) is sleeved on the front fork steerer tube and is in interference fit with the head tube (3); the handlebar riser tube (4) is clamped between the lower crown member (1) and the upper crown member (2), the upper crown member (2) is provided with an axial through hole (5) at the top end, a sunflower drop center (6) is assembled in the through hole, a fastening screw (7) is threadedly connected in the sunflower drop center (6); the top end face of the upper crown member (2) is covered with a drop center cover (8), the drop center cover (8) is limited between the sunflower drop center (6) and the fastening screw (7), characterized in that: The dust cover (9) is provided with an embedded cavity (10) for inserting the nut, and the embedded cavity (10) is detachably connected with an unlocking piece (11) corresponding to the screw groove of the fastening screw (7); when the nut is inserted into the embedded groove, the unlocking piece (11) is inserted into the screw groove of the fastening screw (7).

2. A bicycle fork crown assembly according to claim 1, wherein: The dust cover (9) comprises a cover body (12) and two flip covers (13) symmetrically pivoted to two sides of the cover body (12), and the two flip covers (13) form a 180° rotary pair with the cover body (12) through a pivot; the flip cover (13) has an unlocking position unfolded to be coplanar with the cover body (12) to form a 180° angle, and a protection position folded to be attached to the outer wall of the cover body (12).

3. A bicycle fork crown assembly according to claim 2, wherein: An arc-shaped groove (14) is formed in the outer wall of the cover body (12), and symmetrically formed sliding blocks (15) capable of sliding into the arc-shaped groove (14) are formed on the two side walls of the flip cover (13); when the flip cover (13) reaches the unlocking position or the protection position, the sliding blocks (15) are in clamping cooperation with the arc-shaped groove (14); the inner wall of the arc-shaped groove (14) is integrally formed with a limiting circular block (16).

4. A bicycle fork crown assembly according to claim 2, wherein: One end of the unlocking piece (11) is formed with a protruding part (17) matched with the shape of the screw groove of the fastening screw (7), and the other end is axially extended to form a threaded connecting part (18) in rotational cooperation with the cover body (12).

5. A bicycle fork crown assembly according to claim 3, wherein: An elastic waterproof film (19) is embedded at the pivot connection between the flip cover (13) and the cover body (12), which extends along the pivot axis to form an annular sealing ring; when the flip cover (13) is in the protection position, the waterproof film is compressed to produce radial expansion, and forms an interference fit sealing with the pivot.

6. A bicycle fork crown assembly according to claim 5, wherein: The inner edge of the flip cover (13) and the joint surface of the cover body (12) are provided with mutually meshing sealing teeth (20), and the sealing teeth (20) are filled with a silica gel sealing layer.

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