Expanded flower core assembly

Abstract

The utility model discloses an expansion flower core assembly which is assembled in a front fork tube of a bicycle, links the front fork tube of the bicycle with a first component, and comprises an expansion screw and an expansion screw component which is assembled in a hollow channel of the front fork tube and divides the expansion screw into multiple sections in the axial direction; the screw rod is assembled in the expansion screw; the screw head is assembled on the screw and clamped in the expansion screw component; the end cover is located at the end of the front fork pipe and locked with the screw head in a threaded mode. When the screw rotates in the forward direction, the screw head is pushed to move in the axial direction so as to push the expansion screw component to expand outwards to be extruded and positioned with the inner wall of the front fork pipe. The D-shaped front fork pipe is suitable for being used in a front fork pipe of a mountain bike, the front fork pipe is connected with the first component or the second component, the first component can be a handlebar, the second component can be a frame, and the expansion flower core assembly is installed in the D-shaped front fork pipe, so that the D-shaped front fork pipe is compact in structure, stable in bike body and good in performance.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle accessories, and more specifically to an expansion core component. Background Art

[0002] The front fork of a bicycle is connected to the frame, handlebars and other parts.

[0003] Bicycles can be divided into ordinary bicycles and mountain bikes. Ordinary bicycles do not have high performance requirements and are suitable for commuting to get off work, short-distance travel, etc.;

[0004] Mountain bikes are suitable for long-distance riding, cycling tours and competitions, and have relatively high requirements for weight, structure, performance, etc.

[0005] The front fork, frame and handlebars in ordinary bicycles are usually directly connected by screws and nuts, which is unstable and not suitable for the connection between the front fork, frame and handlebars in mountain bikes.

[0006] The applicant proposes an expansion core assembly which is suitable for connecting a front fork with a handlebar and a frame of a mountain bike and has a compact structure and a stable connection. Utility Model Content

[0007] In view of this, the utility model provides an expansion core component.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an expansion core assembly is assembled in the front fork tube of a bicycle, and connects the front fork tube of the bicycle with the first component, including:

[0009] An expansion screw is assembled in the hollow channel of the front fork tube, and is an expansion screw component that divides the expansion screw into multiple sections along the axial direction;

[0010] Screw, assembled in the expansion screw;

[0011] A screw head, assembled on the screw and clamped in the expansion screw member;

[0012] An end cap, located at the end of the front fork tube and threadedly locked with the screw head;

[0013] When the screw rod rotates in the forward direction, the screw rod head is pushed to move in the axial direction, so as to push the expansion screw component to expand outward and be squeezed and positioned with the inner wall of the front fork tube.

[0014] As a preferred solution of the utility model, the screw head comprises: a first screw head assembled at the first end of the screw and a second screw head assembled at the second end of the screw;

[0015] When the screw rotates in the forward direction, the first screw head and the second screw head move away from each other.

[0016] As a preferred solution of the utility model, the inner wall surface of the expansion screw component is provided with an inclined guide surface A;

[0017] The screw head is correspondingly provided with an inclined guide surface B;

[0018] When the screw is rotated in the forward direction, the screw head is pushed to move in the axial direction, and the inclined guide surface A and the inclined guide surface B cooperate to push the expansion screw component to expand radially outward.

[0019] As a preferred solution of the utility model, the first screw head is provided with a first internal thread segment and a second internal thread segment, the first internal thread segment is threadedly connected to the first end of the screw, and the second internal thread segment is threadedly connected to the end cover.

[0020] As a preferred solution of the utility model, the end cover has a stud threadedly connected to the first screw head, and the diameter of the end cover is at least larger than the inner diameter of the hollow channel.

[0021] As a preferred solution of the utility model, three expansion screw components are provided, and the three expansion screw components have at least two specifications.

[0022] As a preferred solution of the utility model, the end face of the expansion screw component radially extends and protrudes to form a limit plate, and the limit plate conflicts with the end face of the front fork tube.

[0023] As a preferred solution of the utility model, the outer wall surface of the expansion screw component is provided with a groove body;

[0024] The outer wall surface of the expansion screw component is provided with a mounting groove, and a rubber ring is installed in the mounting groove.

[0025] As a preferred solution of the utility model, the outer wall surface of the front fork tube is provided with a plane along the axial direction, and a rounding component is installed on the plane; the cross section of the hollow channel is D-shaped.

[0026] As a preferred solution of the utility model, the end surface of the rounding member radially extends and protrudes to form a limiting portion, and the limiting portion conflicts with the end surface of the front fork tube.

[0027] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial technical effects:

[0028] 1. The utility model is suitable for the front fork tube of a mountain bike, and connects the front fork tube with the first component or the second component. The first component can be a handlebar, and the second component can be a frame. The expansion core assembly is installed in the D-shaped front fork tube, so that the structure is compact, the body is stable, and the performance is excellent;

[0029] 2. The expansion screw of the utility model is composed of a segmented expansion screw component assembly. The screw rod rotates forward to push the expansion screw component outward through the screw rod head, so that the expansion screw component is squeezed against the inner wall of the front fork tube, and the assembly is more stable. Finally, the first component is sleeved outside the front fork tube, and the first component and the front fork tube are tightened and locked by locking the end cover;

[0030] 3. The outer wall surface of the expansion screw component of the utility model is provided with a groove to reduce the overall weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0032] Figure 1 This is a structural schematic diagram of the expansion core assembly of the utility model;

[0033] Figure 2 It is a cross-sectional schematic diagram of the expansion core assembly of the utility model;

[0034] Figure 3 This is a schematic diagram of a top view of the expansion core assembly of the utility model after the end cover is removed;

[0035] Figure 4 This is an exploded view of the expansion core assembly of the utility model;

[0036] Figure 5 It is a schematic diagram of three expansion screw components in the expansion core assembly of the utility model.

[0037] Description of Reference Numerals

[0038] Front fork tube 00; hollow channel 01; plane 02; complementary rounding member 03; limiting portion 031; expansion screw 100; expansion screw member 110; first expansion screw member 110a; second expansion screw member 110b; third expansion screw member 110c; inclined guide surface A111; limiting plate 112; groove body 113; mounting groove 114; channel 115; screw 200; screw head 300; inclined guide surface B301; first screw head 310; first internal thread section 311; second internal thread section 312; second screw head 320; end cover 400; stud 410. DETAILED DESCRIPTION

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0040] Expandable core assembly, see Figure 1-5 As shown, the first component is assembled in the front fork tube 00 of the bicycle to connect the front fork tube 00 of the bicycle with the first component.

[0041] The expansion core assembly includes an expansion screw 100 , a screw rod 200 , a screw rod head 300 and an end cover 400 .

[0042] like Figure 1-2 As shown, a hollow channel 01 is provided in the front fork tube 00 , and the cross-sectional shape of the hollow channel 01 is D-shaped; the expansion core assembly is installed in the hollow channel 01 .

[0043] like Figure 4-5 As shown, the expansion screw 100 is divided into multiple expansion screw components 110 along the axial direction, and here it is divided into three sections of expansion screw components 110, and the three sections of expansion screw components 110 are arranged and distributed in a circumference;

[0044] like Figure 3 As shown, the three-stage expansion screw member 110 is provided with two different specifications, the specifications of the first expansion screw member 110a and the second expansion screw member 110b are the same, and the specifications of the third expansion screw member 110c are different from those of the first and second expansion screw members;

[0045] Alternatively, the specifications of the first expansion screw component 110a, the second expansion screw component 110b, and the third expansion screw component 110c are all different.

[0046] Continue as Figure 3 As shown, when the three-stage expansion screw member 110 expands radially outward, it is squeezed against the inner wall surface of the front fork tube 00, so that the expansion core assembly is stably assembled on the front fork tube.

[0047] The screw rod 200 is assembled in the expansion screw 100; the screw rod head 300 is assembled in the screw rod 200 and is clamped in the expansion screw member 110;

[0048] like Figure 2 and Figure 4 As shown, the screw head 300 includes: a first screw head 310 assembled at the first end of the screw 200 and a second screw head 320 assembled at the second end of the screw 200;

[0049] In this embodiment, the structures of the first screw head 310 and the second screw head 320 are different; the first screw head 310 is T-shaped, and is provided with a first internal thread segment 311 and a second internal thread segment 312, the first internal thread segment 311 is threadedly connected to the first end of the screw 200, and the second internal thread segment 312 is threadedly connected to the end cover 400; the second screw head 320 is frustum-shaped;

[0050] The inner wall surface of the expansion screw component 110 is provided with an inclined guide surface A111; the screw head 300 is correspondingly provided with an inclined guide surface B301;

[0051] Since the second screw head 320 is in a frustum shape, the entire outer wall surface of the second screw head 320 forms the inclined guide surface B301; and the outer wall surface of the first screw head 310 partially forms the inclined guide surface B301; Figure 2 As shown, when the screw 200 rotates forward, the first screw head 310 and the second screw head 320 move away from each other, and the expansion screw component 110 is pushed radially outward by the inclined guide surface A111 and the inclined guide surface B301, so that the expansion screw component 110 is squeezed against the inner wall of the front fork tube 00.

[0052] Furthermore, if Figure 2 As shown, the end cover 400 has a stud 410 threadedly connected to the first screw head 310 , and the diameter of the end cover 400 is at least larger than the inner diameter of the hollow channel 01 .

[0053] In one embodiment, if Figure 2 and Figure 5 As shown, the end surface of the expansion screw member 110 radially extends and protrudes to form a limit plate 112, and the limit plate 112 conflicts with the end surface of the front fork tube 00;

[0054] The position of the expansion screw component 110 in the hollow channel 01 can be limited by the limiting plate 112 to prevent the expansion screw component 110 from being excessively pushed into the hollow channel 01 , while also ensuring that the end cover 400 can be connected to the first screw head 310 .

[0055] Furthermore, the outer wall surface of the expansion screw component 110 is provided with a groove body 113, and the groove body 113 includes a transverse groove body and a longitudinal groove body. The groove body 113 is mainly provided to reduce the weight of the expansion screw 100; the expansion screw component 110 can be provided with a channel 115 to further reduce the weight of the expansion screw 100.

[0056] The outer wall surface of the expansion screw component 110 is provided with a mounting groove 114, and a rubber ring is installed in the mounting groove 114. The rubber ring can be completely received in the mounting groove 114. When the expansion screw 100 is installed, the rubber ring will not interfere with the inner wall of the front fork tube 00; the rubber ring provides a force for the three-section expansion screw component 110 to move toward the center of the circle;

[0057] As mentioned above, Figure 2 As shown, when the screw 200 rotates forward, the first screw head 310 and the second screw head 320 move away from each other, and the expansion screw component 110 is pushed radially outward by the inclined guide surface A111 and the inclined guide surface B301, so that the expansion screw component 110 is squeezed against the inner wall surface of the front fork tube 00;

[0058] Then, when the screw rod 200 rotates in the opposite direction, the first screw head 310 and the second screw head 320 move closer to each other, and under the elastic force of the rubber ring, the three expansion screw components 110 move radially inward, so that the expansion core assembly can be removed from the front fork tube 00.

[0059] In one embodiment, the outer wall surface of the front fork tube 00 is provided with a plane 02 along the axial direction, and a rounding component 03 is installed on the plane 02; the cross section of the hollow channel 01 is D-shaped. The end surface of the rounding component 03 radially extends and protrudes to form a limit portion 031, and the limit portion 031 conflicts with the end surface of the front fork tube 00.

[0060] The specific use of the utility model is further described below:

[0061] First, the first screw head 310 and the second screw head 320 are locked at both ends of the screw 200;

[0062] Next, three expansion screw components 110 are wrapped around the screw rod 200 and clamp the first screw rod head 310 and the second screw rod head 320;

[0063] Next, the rubber ring is inserted into the early installation groove 114, so that the three expansion screw components 110 are composed to form the expansion screw 100, and it is convenient to install it into the hollow channel 01;

[0064] Next, the expansion screw 100, the screw rod 200, and the screw head 300 are installed into the hollow channel 01. At this time, the diameter of the expansion screw 100 can be smaller than or slightly equal to the diameter of the hollow channel 01, so that the expansion screw 100 can smoothly enter the hollow channel 01, and the stop plate 112 contacts the end surface of the front fork tube 00 to prevent the expansion screw 100 from being excessively pushed into the hollow channel 01.

[0065] It is worth mentioning that when the three expansion screw components 110 are tightly connected, that is, the side walls of the three expansion screw components 110 are in contact, the outer diameter of the expansion screw 100 formed in this state is less than or equal to the aperture of the hollow channel 01, ensuring that the expansion screw 100 can be loaded into the hollow channel 01; preferably, the outer diameter of the expansion screw 100 formed in this state is smaller than the aperture of the hollow channel 01, which facilitates the installation of the expansion screw 100.

[0066] Then, the screw 200 is rotated in the forward direction to move the first screw head 310 and the second screw head 320 away from each other. Figure 2 As shown, the first screw head 310 moves upward, and the second screw head 320 moves downward, so as to expand the expansion screw 100 and squeeze it into position with the front fork tube 00;

[0067] Then, after the rounding component 03 is assembled on the front fork tube 00, the first component is mounted on the front fork tube 00. The first component can be a handlebar. Figure 2 The upper end shown corresponds to the position of the rounding member 03;

[0068] Finally, the end cover 400 is installed. The end cover 400 interacts with the first component. During the locking process of the end cover 400 and the first screw 320, the end cover 400 fastens the first component to the front fork tube 00 and cannot be detached. The overall structure is compact, the structure is stable after assembly, and the performance is good.

[0069] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An expansion core assembly, assembled in a front fork tube (00) of a bicycle, connecting the front fork tube (00) of the bicycle with a first component, characterized in that: include: An expansion screw (100) is assembled in the hollow passage (01) of the front fork tube (00), and the expansion screw (100) is divided into a plurality of expansion screw components (110) along the axial direction; A screw rod (200) is assembled in the expansion screw (100); A screw head (300) assembled on the screw (200) and clamped in the expansion screw component (110); An end cap (400) is located at the end of the front fork tube (00) and is thread-locked with the screw head (300); When the screw rod (200) rotates in the forward direction, it pushes the screw rod head (300) to move in the axial direction, so as to push the expansion screw component (110) to expand outward and be pressed and positioned with the inner wall of the front fork tube (00).

2. The expansion core assembly according to claim 1, characterized in that: The screw head (300) comprises: a first screw head (310) assembled on the first end of the screw (200) and a second screw head (320) assembled on the second end of the screw (200); When the screw (200) rotates in the forward direction, the first screw head (310) and the second screw head (320) move away from each other.

3. The expansion core assembly according to claim 1 or 2, characterized in that: The inner wall surface of the expansion screw component (110) is provided with an inclined guide surface A (111); The screw head (300) is correspondingly provided with an inclined guide surface B (301); When the screw (200) rotates in the forward direction, it pushes the screw head (300) to move in the axial direction, and the expansion screw component (110) is pushed to expand radially outward through the cooperation of the inclined guide surface A (111) and the inclined guide surface B (301).

4. The expansion core assembly according to claim 2, characterized in that: The first screw head (310) is provided with a first internal thread section (311) and a second internal thread section (312), the first internal thread section (311) is threadedly connected to the first end of the screw (200), and the second internal thread section (312) is threadedly connected to the end cover (400).

5. The expansion core assembly according to claim 4, characterized in that: The end cover (400) has a stud (410) threadedly connected to the first screw head (310), and the diameter of the end cover (400) is at least larger than the inner diameter of the hollow channel (01).

6. The expansion core assembly according to claim 1, characterized in that: The expansion screw components (110) are provided in three numbers, and the three expansion screw components (110) have at least two specifications.

7. The expansion core assembly according to claim 6, characterized in that: The end surface of the expansion screw component (110) radially extends and protrudes to form a limiting plate (112), and the limiting plate (112) abuts against the end surface of the front fork tube (00).

8. The expansion core assembly according to claim 6, characterized in that: The outer wall surface of the expansion screw component (110) is provided with a groove body (113); The outer wall surface of the expansion screw component (110) is provided with a mounting groove (114), and a rubber ring is installed in the mounting groove (114).

9. The expansion core assembly according to claim 1, characterized in that: The outer wall surface of the front fork tube (00) is provided with a plane (02) along the axial direction, and a rounding component (03) is installed on the plane (02); the cross section of the hollow channel (01) is D-shaped.

10. The expansion core assembly according to claim 9, characterized in that: The end surface of the rounding component (03) radially extends and protrudes to form a limiting portion (031), and the limiting portion (031) conflicts with the end surface of the front fork tube (00).

Images