Internal cable routing frame structure and bicycle

Abstract

The present invention discloses an internal wiring frame structure and a bicycle. The internal wiring frame structure comprises a handlebar assembly, a stem, a front fork vertical tube, a front tube and a plurality of first wirings. A first hollow channel is formed inside the stem, a first end of the stem is arranged at the middle of the handlebar assembly, a handlebar through hole is provided in the middle of the handlebar assembly, and the handlebar through hole is connected with the first hollow channel; the front fork vertical tube is sleeved in the front tube, and the second end of the stem is arranged at the upper end of the front fork vertical tube and is located above the front tube; an outer wall of the front fork vertical tube and an inner wall of the front tube form a second hollow channel, an expansion hanging core assembly is arranged inside the front fork vertical tube, and a third hollow channel is arranged inside the expansion hanging core assembly; the first wiring passes through the handlebar through hole from the handlebar assembly, and after passing through the first hollow channel, a first number of first wirings pass through the second hollow channel, and a second number of first wirings pass through the third hollow channel; thereby a full internal wiring design of the frame is realized, and the riding safety of the bicycle is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bicycles, and in particular to an inner wiring frame structure and a bicycle. Background Art

[0002] The wiring design of a bicycle not only affects the appearance of the bicycle, but is also directly related to the convenience of operation, safety of the rider, and the convenience of maintenance of the entire vehicle. Bicycles in the prior art generally adopt an external wiring solution, that is, the control wiring such as the brake wire and the gear shift wire is directly exposed to the outside of the frame, and is arranged through the conduit reserved in the frame or directly on the surface of the frame. Although this design is simple in structure and easy to install and maintain, it is not aesthetically pleasing and has certain safety hazards. For example, the external wiring is damaged by scratches from external objects such as branches and stones, resulting in brake failure or poor gear shifting, which increases the risk of riding. Summary of the invention

[0003] In view of this, the present invention provides a frame structure with internal wiring and a bicycle, which are used to solve the riding safety hazard problem caused by the external wiring solution of the frame in the prior art.

[0004] To achieve one or part or all of the above purposes or other purposes, a first aspect of the present invention provides an internal cable routing frame structure, including a handlebar assembly, a stem, a front fork stem, a head tube and a plurality of first cables.

[0005] A first hollow passage is formed inside the stem, the stem comprises a first end and a second end opposite to each other, the first end of the stem is arranged in the middle of the handlebar assembly, a handlebar through hole is provided in the middle of the handlebar assembly, and the handlebar through hole is connected with the first hollow passage;

[0006] The front fork vertical tube is sleeved in the front tube of the vehicle, and the second end of the stem is arranged at the upper end of the front fork vertical tube and is located above the front tube of the vehicle;

[0007] The outer side wall of the front fork vertical tube and the inner side wall of the front tube form a second hollow channel, a hollow cavity is formed inside the front fork vertical tube, an expansion hanging core assembly is arranged in the hollow cavity, a plurality of third hollow channels are arranged in the expansion hanging core assembly, and the second hollow channel and each of the third hollow channels are connected with the first hollow channel;

[0008] A plurality of the first wirings pass through the handlebar through hole in the handlebar assembly and pass through the first hollow channel. A first number of the first wirings pass through the second hollow channel and a second number of the first wirings pass through the third hollow channel.

[0009] Furthermore, the outer side wall of the front fork vertical tube and the inner side wall of the head tube also form a fourth hollow channel, and the fourth hollow channel is connected to the first hollow channel.

[0010] Furthermore, the fourth hollow channel and the second hollow channel are arranged on opposite sides of the front fork vertical tube.

[0011] Furthermore, it also includes a front fork branch part and a front wheel control part, the lower end of the front fork vertical tube is connected to the front fork branch part, and the second number of the first wirings pass through the third hollow channel and enter the interior of the front fork branch part until they reach and are connected to the front wheel control part.

[0012] Furthermore, it also includes a frame and a rear wheel control unit. After the first number of the first wiring lines pass through the second hollow channel, they enter the interior of the frame until they reach and are connected to the rear wheel control unit.

[0013] Furthermore, it also includes an adjustment knob, a second wiring and a pedal control part, the adjustment knob is connected to the stem and connected to one end of the second wiring inside the stem, the second wiring passes through the first hollow channel, penetrates into the fourth hollow channel, until it reaches and is connected to the pedal control part.

[0014] Furthermore, a mounting hole is opened above the stem, a stem cover closing the mounting hole is arranged above the mounting hole, an oil storage space is provided inside the stem cover, an oil inlet and an oil outlet are arranged on the stem cover, the adjusting knob is connected to the oil inlet, and the oil outlet is connected to the second wiring.

[0015] Furthermore, a thread is provided on the inner wall of the oil inlet, and the adjusting knob includes a knob cover and an external thread component, the external thread component includes a first end and a second end opposite to each other, the first end of the external thread component is connected to the knob cover, a sealing ring is provided on the outer sleeve of the second end of the external thread component, the second end of the external thread component is inserted into the oil inlet and is connected to the oil inlet by a thread, the sealing ring is fitted with the inner wall of the oil inlet, and the knob cover is sleeved on the outer wall of the oil inlet.

[0016] Furthermore, a connecting bolt is arranged on the inner side of the knob cover, a connecting groove is provided on the first end of the external thread component, and the connecting bolt is inserted into the connecting groove to connect the knob cover with the external thread component.

[0017] Furthermore, a socket is provided on the knob cover, a ball assembly is arranged in the socket, the ball assembly includes a fixing part and a ball, the fixing part is installed in the socket, the ball is arranged at the end of the fixing part, a groove is provided on the outer wall of the oil inlet, the ball is located in the groove, and a plurality of convex ribs are provided in the groove.

[0018] Furthermore, the expansion hanging core assembly includes a first expansion part, a second expansion part, an expansion bolt and an annular fixing part.

[0019] The first expansion part and the second expansion part are relatively symmetrically arranged, the first expansion part is provided with one third hollow channel, and the second expansion part is provided with one third hollow channel;

[0020] A first semi-cylindrical groove is disposed on a side of the first expansion portion opposite to the second expansion portion, and a second semi-cylindrical groove is disposed on a side of the second expansion portion opposite to the first expansion portion, the first semi-cylindrical groove and the second semi-cylindrical groove form a cylindrical groove, and the expansion bolt is inserted into the cylindrical groove;

[0021] A first C-shaped groove is provided on the outer wall of the first expansion part, and a second C-shaped groove is provided on the outer wall of the second expansion part. The first C-shaped groove and the second C-shaped groove form an annular groove, which is on a plane perpendicular to the third hollow channel, and the annular fixing part is provided in the annular groove.

[0022] Furthermore, the cylindrical groove includes a first conical groove, a cylindrical groove and a second conical groove arranged in sequence from top to bottom, and the expansion bolt includes an adjustment bolt, a first conical portion matching the first conical groove, an inner core matching the cylindrical groove and a second conical portion matching the second conical groove arranged in sequence from top to bottom.

[0023] Furthermore, the second end of the stem is clamped on the upper end of the front fork stem, the expansion core assembly is arranged inside the upper end of the front fork stem, and the expansion core assembly and the second end of the stem are respectively located at inner and outer sides of the same position of the front fork stem.

[0024] A second aspect of the present invention provides a bicycle comprising the above-mentioned internal cable routing frame structure.

[0025] Implementing the embodiments of the present invention will have the following beneficial effects:

[0026] The present invention provides an internal wiring frame structure and a bicycle, wherein the internal wiring frame structure comprises a handlebar assembly, a stem, a front fork vertical tube, a front tube and a plurality of first wirings, wherein the first end of the stem is arranged in the middle of the handlebar assembly, a handlebar through hole is provided in the middle of the handlebar assembly, so that the handlebar through hole is connected with a first hollow channel in the stem; the front fork vertical tube is sleeved in the front tube, and a second hollow channel is formed between the outer wall of the front fork vertical tube and the inner wall of the front tube; and an expansion hanging core assembly is arranged inside the front fork vertical tube, and a plurality of third hollow channels are arranged in the expansion hanging core assembly, so that The second hollow channel and each third hollow channel are all connected with the first hollow channel; thus, a plurality of first lines pass through the handlebar through-hole from the handlebar assembly, and are divided into two groups after passing through the first hollow channel, one group of first lines passes through the second hollow channel, and the other group of first lines passes through the third hollow channel; a fully internal wiring design of the frame is realized, and all the lines are hidden inside the frame, avoiding the disorder of external wiring and improving the overall aesthetics of the bicycle; at the same time, the risk of damage to the external wiring due to environmental factors is also avoided, greatly improving the safety of riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention 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 described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] in:

[0029] Figure 1 It is a schematic diagram of the overall structure of the inner wiring frame structure in one embodiment;

[0030] Figure 2 It is a schematic diagram of an exploded structure of a handlebar assembly and a stem in one embodiment;

[0031] Figure 3 It is a schematic diagram of the structure before the front fork stem and the head tube are assembled in one embodiment;

[0032] Figure 4 It is a schematic diagram of the structure after the front fork vertical tube and the expansion hanging core assembly are assembled in one embodiment;

[0033] Figure 5 A schematic diagram of the distribution of internal wiring in an embodiment;

[0034] Figure 6 It is a schematic diagram of the structure of a handle in one embodiment;

[0035] Figure 7 It is a schematic diagram of the structure after the front fork vertical tube and the head tube are assembled in one embodiment;

[0036] Figure 8 It is a structural schematic diagram of an expansion hanging core assembly in one embodiment;

[0037] Fig. 9 It is a schematic diagram of the exploded structure of the front fork vertical tube and the expansion hanging core assembly in one embodiment;

[0038] Fig.10 is a schematic diagram of the structure of the first expansion portion and the second expansion portion in one embodiment;

[0039] Fig.11 In one embodiment Fig.10 A left side view of the first expansion portion;

[0040] Fig.12 It is a partial structural schematic diagram of a stem cover with an adjustment knob installed in one embodiment;

[0041] Fig.13 It is a partial structural schematic diagram of a stem cover with an adjustment knob installed in one embodiment;

[0042] Fig.14 It is a schematic diagram of an exploded structure of a stem cover with an adjustment knob installed in one embodiment;

[0043] Fig.15 It is a structural schematic diagram of a stem cover in one embodiment;

[0044] Fig.16 FIG. 1 is a perspective structural diagram of a bicycle in one embodiment.

[0045] Description of the accompanying drawings:

[0046] 1: handlebar assembly; 101: handlebar through hole; 102: handlebar;

[0047] 2: stem; 201: first end; 2011: first bolt; 202: second end; 2021: opening; 2022: second bolt; 203: mounting hole; 2031: thread hole; 204: stem cover; 2041: oil inlet; 2042: thread; 2043: groove; 2044: rib; 2045: oil outlet; 2046: retaining spring groove; 2047: retaining spring;

[0048] 3: front fork vertical tube; 31: front fork branch part; 32: front wheel control part;

[0049] 4: front tube; 41 frame; 42: rear wheel control unit;

[0050] 5: First routing;

[0051] 6: expansion hanging core assembly; 601: first expansion part; 6011: first semi-cylindrical groove; 6012: first C-shaped groove; 602: second expansion part; 6021: second semi-cylindrical groove; 6022: second C-shaped groove; 603: expansion bolt; 6031: adjustment bolt; 6032: first conical part; 6033: inner core; 6034: second conical part; 604: annular fixing part; 605: cylindrical groove; 6051: first conical groove; 6052: cylindrical groove; 6053: second conical groove; 606: annular groove;

[0052] 7: adjusting knob; 701: knob cover; 7011: connecting bolt; 7012: socket; 7013: fixing part; 7014: ball; 702: external thread assembly; 7023: connecting groove; 703: sealing ring;

[0053] 8: Second wiring; 9: Foot control unit;

[0054] 1a: first hollow channel; 2a: second hollow channel; 3a: third hollow channel; 4a: fourth hollow channel. DETAILED DESCRIPTION

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0056] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0058] Reference Figure 1-Figure 4 The embodiment of the present invention shows an internal wiring frame structure, including a handlebar assembly 1, a stem 2, a front fork stem 3, a head tube 4 and a plurality of first wirings 5.

[0059] A first hollow passage 1a is formed inside the stem 2. The stem 2 includes a first end 201 and a second end 202 opposite to each other. The first end of the stem 2 is disposed in the middle of the handlebar assembly 1. A handlebar through hole 101 is provided in the middle of the handlebar assembly 1. The handlebar through hole 101 is connected to the first hollow passage 1a.

[0060] The front fork stem 3 is sleeved in the head tube 4, and the second end 202 of the stem is disposed at the upper end of the front fork stem 3 and is located above the head tube 4;

[0061] The outer wall of the front fork vertical tube 3 and the inner wall of the front tube 4 form a second hollow channel 2a, and a hollow cavity is formed inside the front fork vertical tube 3. An expansion hanging core assembly 6 is arranged in the hollow cavity, and a plurality of third hollow channels 3a are arranged in the expansion hanging core assembly 6. The second hollow channel 2a and each of the third hollow channels 3a are connected with the first hollow channel 1a.

[0062] Several first wirings 5 ​​pass through the handlebar through hole 101 from the handlebar assembly 1, and after passing through the first hollow channel 1a, a first number of the first wirings 5 ​​pass through the second hollow channel 2a, and a second number of the first wirings 5 ​​pass through the third hollow channel 3a.

[0063] In this embodiment, the handlebar assembly 1 includes a handlebar 102, brakes and other components. Usually, a starting end of an internal line such as a brake line and a shift line is set at the handlebar 102 of the handlebar assembly 1. The first line 5 of this embodiment starts from the control component (such as a brake, a knob, etc.) of the handlebar assembly 1, passes through the interior of the handlebar assembly 1, and passes through the handlebar through hole 101 opened in the middle of the handlebar assembly 1, and then enters the interior of the stem 2 connected to the handlebar assembly 1. The first end 201 of the stem is tightly clamped in the middle of the handlebar assembly 1 by a fastener such as a first bolt 2011, so that the first line passing through the handlebar assembly 1 passes into the interior of the stem 2 without being exposed.

[0064] The interior of the stem 2 is a first hollow channel 1a, which is used to arrange and accommodate various wiring. A mounting hole 203 is provided above the stem 2 to facilitate the connection of various wiring when the frame is assembled. The shape of the mounting hole 203 should be adapted to the wiring position. A stem cover 20404 is provided above the mounting hole 203 to close the mounting hole 203. The stem cover 20404 is detachably connected to the stem 2.

[0065] The second end 202 of the stem is sleeved on the upper end of the fork stem 3, and the opening 2021 of the second end 202 of the stem is locked by a fastener such as a second bolt 2022, so that the second end 202 of the stem is firmly clamped on the upper end of the fork stem 3. The cross-section of the inner surface of the second end 202 of the stem is circular, and the cross-section of the fork stem 3 is not circular, but has a special shape of a partial arc segment. After the second end 202 of the stem is sleeved on the upper end of the fork stem 3, the arc segment of the fork stem 3 fits with the inner surface of the second end of the stem, and the non-arc segment surface of the fork stem 3 forms a first gap with the inner surface of the second end 202 of the stem for passing the first number of first routing lines. Similarly, the cross-section of the inner side wall of the head tube 4 is circular, and the non-arc segment surface of the fork stem 3 and the inner side wall of the head tube form a cavity, that is, the second hollow channel 2a. After the first number of first wirings 5 ​​pass through the first gap, they enter the second hollow channel 2a. The non-arc segment surface of the front fork stem 3 can be a straight segment or an arc segment with a smaller curvature, etc., so as to form a cavity for accommodating the first number of first wirings 5 ​​with the inner surface of the second end 202 of the stem and the inner wall of the head tube 4. In a specific embodiment, the cross section of the front fork stem 3 is a D-shaped structure, including a C-shaped arc segment and a straight segment.

[0066] The front fork riser 3 is a hollow structure, and an expansion core assembly 6 is arranged inside. The expansion core assembly 6 has the effect of strengthening the structural strength of the front fork riser 3, and on the other hand, a plurality of third hollow channels 3a are arranged inside it for passing the second number of first wiring lines 5. In a specific embodiment, the first number is two, and the second number is two, and corresponding to the second number, the third hollow channels 3a are also two.

[0067] The internal wiring frame structure of this embodiment adopts a fully internal wiring design, and all wiring is hidden inside the frame, avoiding the clutter of external wiring and improving the overall aesthetics of the bicycle; at the same time, it also avoids the risk of damage to the external wiring due to environmental factors, greatly improving the safety of riding.

[0068] Reference Figure 7 In one embodiment, the outer wall of the front fork vertical tube 3 and the inner wall of the head tube 4 further form a fourth hollow channel 4a, and the fourth hollow channel 4a is connected with the first hollow channel 1a.

[0069] In this embodiment, the cross section of the front fork vertical tube 3 is not circular, but has a special shape with a plurality of arc segments and a plurality of non-arc segments. For example, the cross section of the front fork vertical tube 3 includes two opposite arc segments and two opposite straight segments. Then the surface corresponding to a straight segment of the cross section of the front fork vertical tube 3 forms a first gap with the inner surface of the second end of the handlebar, and forms a second hollow channel 2a with the inner wall of the head tube 4. The surface corresponding to another straight segment of the cross section of the front fork vertical tube 3 forms a second gap with the inner surface of the second end 202 of the handlebar, and forms a fourth hollow channel 4a with the inner wall of the head tube 4. For bicycle designs with a greater number of internal wiring, a fourth hollow channel 4a can be added to achieve a full internal wiring design.

[0070] Reference Figure 7 In one embodiment, the fourth hollow channel 4 a and the second hollow channel 2 a are disposed on opposite sides of the front fork stem 3 .

[0071] In this embodiment, by respectively providing the second hollow channel 2a and the fourth hollow channel 4a on opposite sides of the front fork vertical tube 3, the layout of the wiring can be optimized, mutual interference between the wiring can be avoided, and smooth transmission of the wiring can be ensured; at the same time, the symmetrical structural design is also conducive to enhancing the structural strength of the front fork vertical tube 3 itself.

[0072] In specific implementation, the specific routing path can be designed according to the functional requirements of the bicycle.

[0073] Reference Figure 1 In one embodiment, it further includes a front fork branch portion 31 and a front wheel control portion 32, the lower end of the front fork vertical tube 3 is connected to the front fork branch portion 31, and the second number of the first wiring lines 5 pass through the third hollow channel 3a and enter the interior of the front fork branch portion 31 until they reach and are connected to the front wheel control portion 32. The lower end of the front fork vertical tube 3 is connected to the front fork branch portion 31 to form a complete front fork structure. The front wheel control portion 32 can be, for example, a brake system, a gear shift system, etc.

[0074] Reference Figure 1 In one embodiment, the vehicle further includes a frame 41 and a rear wheel control unit 42. After the first number of first wiring lines 5 pass through the second hollow channel 2a, they enter the interior of the frame 41 and are transmitted along a preset path inside the frame 41 until they reach and are connected to the rear wheel control unit 42. The rear wheel control unit 42 can be, for example, a brake system, a transmission system, etc.

[0075] Reference Figure 5 and Figure 6In one embodiment, it further includes an adjustment knob 7, a second wiring 8 and a pedal control unit 9. The adjustment knob 7 is connected to the stem 2 and is connected to one end of the second wiring 8 inside the stem 2. The second wiring 8 passes through the first hollow channel 1a and penetrates into the fourth hollow channel 4a until it reaches and is connected to the pedal control unit 9. The pedal control unit 9 can be, for example, a speed change system, a brake system, a shock absorption system, etc. Correspondingly, in this embodiment, the mounting hole 203 of the stem 2 is additionally provided with a wire hole 2031 for passing the second wiring 8. After passing through the first hollow channel 1a, the second wiring 8 penetrates through the wire hole 2031 and then enters the fourth hollow channel 4a.

[0076] Reference Figure 12-15 In one embodiment, a mounting hole 203 is provided above the stem 2, a stem cover 204 is provided above the mounting hole 203 to close the mounting hole 203, an oil storage space is provided inside the stem cover 204, an oil inlet 2041 and an oil outlet 2045 are provided on the stem cover 204, the adjustment knob 7 is connected to the oil inlet 2041, and the oil outlet 2045 is connected to the second wiring 8. In this embodiment, by installing a small-sized adjustment knob 7 on the stem, it is convenient for the rider to operate at any time during riding, and it is not easy to interfere with other control components of the handlebar. From the appearance, only the adjustment knob 7 is added, which saves bicycle space and makes the design of the bicycle more compact and beautiful.

[0077] In one embodiment, a thread 2042 is provided on the inner wall of the oil inlet 2041, and the adjusting knob 7 includes a knob cover 701 and an external thread component 702, the external thread component 702 includes a first end and a second end relative to each other, the first end of the external thread component 702 is connected to the knob cover 701, a sealing ring 703 is provided on the outer side of the second end of the external thread component 702, the second end of the external thread component 702 is inserted into the oil inlet 2041 and connected to the oil inlet 2041 through the thread 2042, the sealing ring 703 is fitted with the inner wall of the oil inlet 2041, and the knob cover 701 is sleeved on the outer wall of the oil inlet 2041.

[0078] In this embodiment, the handlebar cover 204 is designed with an oil storage space inside for storing the hydraulic oil required for oil pressure operations such as braking or shifting, and the hydraulic oil is filled in the oil storage space and the second wiring 8. The tank body of the handlebar cover 204 is provided with an oil inlet 2041 and an oil outlet 2045. The number of the oil inlet 2041 and the oil outlet 2045 can be determined according to the specific usage scenario, and can be one or more. An external thread component 702 is inserted into the oil inlet 2041. When the adjustment knob 7 is rotated, the external thread component 702 connected to the adjustment knob 7 will be driven to move forward along the thread into the oil inlet 2041 (the forward direction points to the oil storage space) or backward (the backward direction points to the outside of the oil storage space). The sealing ring 703 fits tightly against the inner wall of the oil inlet 2041 to prevent the hydraulic oil from leaking from the oil inlet 2041. The knob cover 701 is sleeved on the outer wall of the oil inlet 2041, which is easy for the rider to operate. When the rider needs to adjust the pressure of the bicycle hydraulic system, he only needs to rotate the knob cover 701. The amount of hydraulic oil entering the oil storage space can be further adjusted by adjusting the rotation angle of the knob cover 701, thereby achieving precise control of the hydraulic system pressure.

[0079] Specifically, when the hydraulic system needs to output hydraulic oil to perform operations such as braking or shifting, the knob cover 701 is rotated in the first direction, so that the external thread component 702 moves forward along the thread, provides pressure to the hydraulic oil in the oil storage space, and pushes the hydraulic oil to flow out to the oil outlet 2045 into the second wiring 8, thereby driving the control components (such as the brake system, the shock absorber system, the speed change system, etc.) connected to the end of the second wiring 8 to perform corresponding control on the bicycle. When the hydraulic system needs to stop performing operations such as braking or shifting, the knob cover 701 is rotated in the second direction (the second direction is opposite to the first direction), so that the external thread component 702 moves backward along the thread, releases the pressure applied to the hydraulic oil in the oil storage space, and the hydraulic oil flows back from the second wiring 8 to the oil storage space, and stops acting on the control components (such as the brake system, the shock absorber system, the speed change system, etc.) connected to the end of the second wiring 8.

[0080] Reference Fig.14 In one embodiment, a connecting bolt 7011 is provided on the inner side of the knob cover 701 , a connecting groove 7023 is provided at the first end of the external thread component 702 , and the connecting bolt 7011 is inserted into the connecting groove 7023 to connect the knob cover 701 with the external thread component 702 .

[0081] In this embodiment, the knob cover 701 is not connected to the external thread assembly 702 in an integral manner. Instead, the connection between the two is achieved through the cooperation between the connecting bolt 7011 and the connecting groove 7023. The knob cover 701 is fixed to the outside of the stem cover 204 and can be rotated without displacement in other directions. The connecting bolt 7011 is set to have a certain length. When the knob cover 701 is rotated, the connecting bolt 7011 drives the external thread assembly 702 to rotate, and the external thread assembly 702 moves forward or backward along the thread, and the insertion depth of the connecting bolt 7011 in the connecting groove 7023 is reduced or increased. In a specific embodiment, in one embodiment, the connecting bolt 7011 is a hexagon socket bolt, and the connecting groove 7023 is a hexagon socket hole.

[0082] Reference Fig.14 In one embodiment, the knob cover 701 is provided with a socket 7012, and a ball assembly is arranged in the socket 7012, and the ball assembly includes a fixing portion 7013 and a ball 7014, the fixing portion 7013 is installed in the socket 7012, and the ball 7014 is arranged at the end of the fixing portion 7013, and a groove 2043 is arranged on the outer wall of the oil inlet 2041, and the ball 7014 is located in the groove 2043. Specifically, the longitudinal section of the oil inlet 2041 is annular, and the groove 2043 is an annular groove surrounding the oil inlet 2041, and a plurality of convex ribs 2044 are arranged in the groove 2043.

[0083] In this embodiment, the fixed part 7013 is fixedly installed in the jack 7012 by interference fit or threaded connection, and the bead 7014 is movable relative to the fixed part 7013. The bead 7014 is arranged in the annular groove. When the rider rotates the knob cover 701, the bead 7014 slides in the annular groove. When it touches the convex rib 2044, the bead 7014 is compressed in the direction of the fixed part 7013. When the bead 7014 slides into the space between the two convex ribs 2044, the bead 7014 pops outward. When the rider rotates the knob cover 701, he can hear the sound of rotation and receive intuitive feedback on the operation of the oil pressure system. The bead 7014 is confined in the groove 2043, and a stable connection between the adjustment knob 7 and the stem cover 204 is also achieved.

[0084] Reference Fig.14 and Fig.15In one embodiment, the oil outlet 2045 is provided with a retaining ring groove 2046, the second wiring 8 is inserted into the oil outlet 2045, and a retaining ring 2047 is clamped at the retaining ring groove 2046. The two clamping angles of the retaining ring 2047 pass through the retaining ring groove 2046 to clamp and fix the second wiring 8. Since the retaining ring 2047 has a certain elasticity and pre-tightening force, after the clamping angle passes through the retaining ring groove 2046, it bends inwards and tightly clamps the outer wall of the second wiring 8, thereby achieving a stable connection of the second wiring 8. A sealing ring is set at the end of the second wiring 8 to achieve the sealing of the oil outlet 2045.

[0085] Reference Figure 8-Figure 11 In one embodiment, the expansion core assembly 6 includes a first expansion portion 601, a second expansion portion 602, an expansion bolt 603 and an annular fixing portion 604.

[0086] The first expansion portion 601 and the second expansion portion 602 are relatively symmetrically arranged, one third hollow channel 3a is arranged in the first expansion portion 601, and one third hollow channel 3a is arranged in the second expansion portion 602;

[0087] A first semi-cylindrical groove 6011 is provided on a side of the first expansion portion 601 opposite to the second expansion portion 602, and a second semi-cylindrical groove 6021 is provided on a side of the second expansion portion 602 opposite to the first expansion portion 601. The first semi-cylindrical groove 6011 and the second semi-cylindrical groove 6021 form a cylindrical groove 605, and the expansion bolt 603 is inserted into the cylindrical groove 605;

[0088] A first C-shaped groove 6012 is provided on the outer wall of the first expansion portion 601, and a second C-shaped groove 6022 is provided on the outer wall of the second expansion portion 602. The first C-shaped groove 6012 and the second C-shaped groove 6022 form an annular groove 606, and the annular groove 606 is on a plane perpendicular to the third hollow channel 3a. The annular fixing portion 604 is provided in the annular groove 606.

[0089] In this embodiment, the first expansion part 601 and the second expansion part 602 have the same structure and are symmetrically arranged. The first expansion part 601 and the second expansion part 602 are of separate design, and the two can be positioned and matched by the annular fixing part 604. The annular fixing part 604 is arranged in the annular groove 606, and the annular groove 606 should have a certain depth to completely accommodate the annular fixing part 604, so as to avoid the annular fixing part 604 protruding more than the outer surface of the first expansion part 601 and the second expansion part 602. The annular fixing part 604 can be a component with a certain restraining force such as a rubber ring and a retaining spring, so as to achieve the initial matching and fixing of the first expansion part 601 and the second expansion part 602, and prevent the first expansion part 601 or the second expansion part 602 from relative displacement in the front fork vertical tube 3. On the side opposite to the first expansion part 601 and the second expansion part 602, a first semi-cylindrical groove 6011 and a second semi-cylindrical groove 6021 are respectively arranged. When the first expansion part 601 and the second expansion part 602 are combined together, the two semi-cylindrical grooves form a complete cylindrical groove 605. The expansion bolt 603 is inserted into the cylindrical groove 605. By tightening the expansion bolt 603, the first expansion part 601 and the second expansion part 602 can be expanded in all directions, so as to fit tightly on the inner wall of the front fork vertical tube 3, thereby achieving the purpose of strengthening the structural strength. In the specific design, the outer peripheral shape of the first expansion part 601 and the second expansion part 602 should be closely matched with the inner wall shape of the front fork vertical tube 3. The expansion hanging core assembly 6 of this embodiment not only has the function of strengthening the structural strength of the front fork vertical tube 3, but also can serve as a channel for wiring.

[0090] Reference Fig. 9 and Fig.11 In one embodiment, the cylindrical groove 605 includes a first conical groove 6051, a cylindrical groove 6052 and a second conical groove 6053 arranged in sequence from top to bottom, and the expansion bolt 603 includes an adjustment bolt 6031, a first conical portion 6032 matching the first conical groove 6051, an inner core 6033 matching the cylindrical groove 6052 and a second conical portion 6034 matching the second conical groove 6053 arranged in sequence from top to bottom.

[0091] In this embodiment, the first conical portion 6032 and the inner core 6033 are integrally arranged, and the inner core 6033 is inserted downward from the top of the cylindrical groove 605 until the first conical portion 6032 abuts against the first conical groove 6051, and then the second conical portion 6034 is connected to the lower end of the inner core 6033 by means of a threaded rotation until it abuts against the second conical groove 6053. The lower end of the adjusting bolt 6031 is connected to the first conical portion 6032, and when the adjusting bolt 6031 is rotated, it pushes the inner core 6033 to move downward along the cylindrical groove 6052, and at the same time, the first conical portion 6032 and the second conical portion 6034 are gradually squeezed inward in the first conical groove 6051 and the second conical groove 6053, respectively, to generate a radial expansion force, so that the expansion hanging core assembly 6 is closely attached to the inner wall of the front fork stem 3, thereby achieving a firm fixing effect. The upper end of the adjusting bolt 6031 is located on the outside of the stem 2, for example, it can be inserted into the stem cover 20404, so as to facilitate the use of tools (such as a wrench, etc.) for rotation operation.

[0092] Reference Figure 1 and Figure 4 In one embodiment, the second end 202 of the stem is clamped on the upper end of the front fork stem 3, the expansion core assembly 6 is arranged inside the upper end of the front fork stem 3, and the expansion core assembly 6 and the second end 202 of the stem are respectively located at the inner and outer sides of the same position of the front fork stem 3.

[0093] In this embodiment, the connection between the fork riser 3 and the stem 2 is achieved by a clamping device, for example, a clamping interface is provided at the connection between the second end 202 of the stem and the fork riser 3, and the clamping interface is locked by a bolt or other fastener. In order to ensure the stability of the stem during riding, when the stem 2 is clamped on the fork riser 3, a large clamping external force is required, and the fork riser 3 in the embodiment of the present invention is a hollow structure (for routing), and the cross section of the fork riser 3 is non-circular, and there is a gap between the stem 2, which leads to the position where the fork riser 3 is clamped under a large clamping external force, which leads to the instability of the overall structure of the bicycle. In order to ensure the stability during riding, the expansion core assembly 6 is arranged inside the fork riser 3 and at a position corresponding to the clamping position of the stem 2, so as to enhance the structural strength of the fork riser 3 to effectively resist the clamping external force applied by the stem 2.

[0094] Specifically, the structure of the expansion core assembly 6 is adapted to the internal shape of the upper end of the front fork stem 3. The expansion core assembly 6 can be easily placed inside the front fork stem 3 in an unexpanded state, and can fit closely to the inner wall of the front fork stem 3 after radial expansion. During installation, the first expansion portion 601 and the second expansion portion 602 are aligned, the annular fixing portion 604 is sleeved in the annular groove 606, and then the inner core 6033 is inserted downward from the top of the cylindrical groove 605 until the first conical portion 6032 abuts against the first conical groove 6051, and then the second conical portion 6034 is connected to the lower end of the inner core 6033 by screw thread rotation, and is rotated until it abuts against the second conical groove 6053; then it is placed at the position corresponding to the stem 2 inside the upper end of the front fork vertical tube 3; then the corresponding wiring is passed through the third hollow channel 3a, and the connection of other wiring is completed; then the second end 202 of the stem is clamped on the upper end of the front fork vertical tube 3, the wiring adjustment is completed, the stem cover 20404 is covered on the top of the stem 2, and the adjustment bolt 6031 is inserted from the pre-set bolt hole and connected to the first conical portion 6032. Then, the adjusting bolt 6031 is rotated to realize radial expansion of the expansion core assembly 6 so that it fits tightly with the inner wall of the front fork vertical tube 3 .

[0095] Since the expansion core assembly 6 fits tightly against the inner wall of the fork stem 3, it actually provides an additional support layer for the fork stem 3, thereby enhancing the structural strength of the region. The clamping force of the stem 2 no longer relies solely on the material strength of the fork stem 3 itself, but forms a more solid connection system together with the expansion core assembly 6. Although the third hollow channel 3a is provided in the expansion core assembly 6, the wiring arranged therein fills the hollow region, thereby forming a nearly solid expansion member in structure, which realizes the internal wiring while significantly enhancing the structural strength of the fork stem 3 in the connection region, enabling it to better withstand the clamping external force transmitted by the stem 2, thereby reducing the risk of fatigue fracture caused by long-term stress concentration.

[0096] Reference Fig.16 An embodiment of the present invention also shows a bicycle, including the internal wiring frame structure of any of the aforementioned embodiments.

[0097] The bicycle of this embodiment adopts a fully internal wiring frame structure design, and all wiring is hidden inside the frame, avoiding the clutter of external wiring and improving the overall aesthetics of the bicycle; at the same time, it also avoids the risk of damage to the external wiring due to environmental factors, greatly improving the safety of riding.

[0098] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. An internal wiring frame structure, characterized in that: Including handlebar assembly, stem, front fork vertical tube, head tube and several first lines, A first hollow passage is formed inside the stem, the stem comprises a first end and a second end opposite to each other, the first end of the stem is arranged in the middle of the handlebar assembly, a handlebar through hole is provided in the middle of the handlebar assembly, and the handlebar through hole is connected with the first hollow passage; The front fork vertical tube is sleeved in the front tube of the vehicle, and the second end of the stem is arranged at the upper end of the front fork vertical tube and is located above the front tube of the vehicle; The outer side wall of the front fork vertical tube and the inner side wall of the front tube form a second hollow channel, a hollow cavity is formed inside the front fork vertical tube, an expansion hanging core assembly is arranged in the hollow cavity, a plurality of third hollow channels are arranged in the expansion hanging core assembly, and the second hollow channel and each of the third hollow channels are connected with the first hollow channel; A plurality of the first wirings pass through the handlebar through hole in the handlebar assembly and pass through the first hollow channel. A first number of the first wirings pass through the second hollow channel and a second number of the first wirings pass through the third hollow channel.

2. The inner wiring frame structure according to claim 1, characterized in that: The outer side wall of the front fork vertical tube and the inner side wall of the head tube further form a fourth hollow channel, and the fourth hollow channel is connected to the first hollow channel.

3. The inner wiring frame structure according to claim 2, characterized in that: The fourth hollow channel and the second hollow channel are disposed on opposite sides of the front fork vertical tube.

4. The inner wiring frame structure according to claim 1 or 2, characterized in that: It also includes a front fork branch part and a front wheel control part. The lower end of the front fork vertical tube is connected to the front fork branch part. After the second number of the first wirings pass through the third hollow channel, they enter the interior of the front fork branch part until they reach and are connected to the front wheel control part.

5. The inner wiring frame structure according to claim 1 or 2, characterized in that: It also includes a frame and a rear wheel control unit. After the first number of the first wiring lines pass through the second hollow channel, they enter the interior of the frame until they reach and are connected to the rear wheel control unit.

6. The inner wiring frame structure according to claim 2, characterized in that: It also includes an adjustment knob, a second line and a pedal control part. The adjustment knob is connected to the stem and connected to one end of the second line inside the stem. The second line passes through the first hollow channel and enters the fourth hollow channel until it reaches and is connected to the pedal control part.

7. The inner wiring frame structure according to claim 6, characterized in that: A mounting hole is provided above the stem, a stem cover is provided above the mounting hole to close the mounting hole, an oil storage space is provided inside the stem cover, an oil inlet and an oil outlet are provided on the stem cover, the adjustment knob is connected to the oil inlet, and the oil outlet is connected to the second wiring.

8. The inner wiring frame structure according to claim 7, characterized in that: The inner wall of the oil inlet is provided with a thread, the adjusting knob includes a knob cover and an external thread component, the external thread component includes a first end and a second end opposite to each other, the first end of the external thread component is connected to the knob cover, a sealing ring is arranged outside the second end of the external thread component, the second end of the external thread component is inserted into the oil inlet and is connected to the oil inlet by a thread, the sealing ring is fitted with the inner wall of the oil inlet, and the knob cover is sleeved on the outer wall of the oil inlet.

9. The inner cable routing frame structure according to claim 8, characterized in that: A connecting bolt is arranged on the inner side of the knob cover, a connecting groove is arranged on the first end of the external thread component, and the connecting bolt is inserted into the connecting groove to connect the knob cover with the external thread component.

10. The inner cable routing frame structure according to claim 8, characterized in that: The knob cover is provided with a socket, a ball assembly is arranged in the socket, the ball assembly comprises a fixing part and a ball, the fixing part is installed in the socket, the ball is arranged at the end of the fixing part, a groove is arranged on the outer wall of the oil inlet, the ball is located in the groove, and a plurality of convex ribs are arranged in the groove.

11. The inner wiring frame structure according to claim 1 or 2, characterized in that: The expansion hanging core assembly comprises a first expansion part, a second expansion part, an expansion bolt and an annular fixing part. The first expansion part and the second expansion part are relatively symmetrically arranged, the first expansion part is provided with one third hollow channel, and the second expansion part is provided with one third hollow channel; A first semi-cylindrical groove is disposed on a side of the first expansion portion opposite to the second expansion portion, and a second semi-cylindrical groove is disposed on a side of the second expansion portion opposite to the first expansion portion, the first semi-cylindrical groove and the second semi-cylindrical groove form a cylindrical groove, and the expansion bolt is inserted into the cylindrical groove; A first C-shaped groove is provided on the outer wall of the first expansion part, and a second C-shaped groove is provided on the outer wall of the second expansion part. The first C-shaped groove and the second C-shaped groove form an annular groove, which is on a plane perpendicular to the third hollow channel, and the annular fixing part is provided in the annular groove.

12. The inner wiring frame structure according to claim 11, characterized in that: The cylindrical groove includes a first conical groove, a cylindrical groove and a second conical groove arranged in sequence from top to bottom, and the expansion bolt includes an adjustment bolt, a first conical portion matching the first conical groove, an inner core matching the cylindrical groove and a second conical portion matching the second conical groove arranged in sequence from top to bottom.

13. The inner cable routing frame structure according to claim 1, characterized in that: The second end of the stem is clamped on the upper end of the front fork stem, the expansion core assembly is arranged inside the upper end of the front fork stem, and the expansion core assembly and the second end of the stem are respectively located at inner and outer sides of the same position of the front fork stem.

14. A bicycle, characterized in that: It comprises an internal wiring frame structure as described in any one of claims 1-13.

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