Rotary oil passing bicycle head structure and bicycle

Abstract

The invention relates to a rotary oil passing bicycle head structure and a bicycle. The rotary oil passing bicycle head structure is matched with a bicycle frame for use, and comprises a front fork vertical pipe, a front fork, a rear fork vertical pipe and a rear fork vertical pipe, wherein the front fork vertical pipe is rotationally assembled at the front part of the bicycle frame; the inner core piece at least comprises a first core part and a second core part which are sequentially arranged in the axial direction, a first annular groove, a second annular groove and a third annular groove are sequentially formed in the annular outer wall of the second core part, a first oil channel and a second oil channel are axially formed in the inner core piece, and the first end of the first oil channel communicates with the first annular groove; the second end of the second oil channel communicates with the free end of the first core part to form a first oil outlet, and the two ends of the second oil channel communicate with the second annular groove and the third annular groove correspondingly. The rotating piece comprises a rotating sleeve body, the position, corresponding to the third ring groove, of the second core part is movably sleeved with the rotating sleeve body, and a second oil outlet communicating with the third ring groove in the radial direction is formed in the side wall, corresponding to the third ring groove, of the rotating sleeve body; the oil sleeve piece comprises an oil sleeve body, the oil sleeve body is fixedly arranged at the positions, corresponding to the first ring groove and the second ring groove, of the second core part in a sleeving mode, a first oil inlet radially communicating with the first ring groove is formed in the side wall, corresponding to the first ring groove, of the oil sleeve body, and a second oil inlet radially communicating with the second ring groove is formed in the side wall, corresponding to the second ring groove, of the oil sleeve body. Hidden assembly of the oil pipe is achieved, interference of the oil pipe is avoided during steering of the bicycle, and smooth riding is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycle accessories, and in particular to a rotary oil-passing front wheel structure and a bicycle. Background Art

[0002] At present, the brake oil pipe routing method of various common bicycles on the market mainly adopts internal routing of the frame part, that is, the oil pipe connected to the rear brake lower pump extends to the column below the handlebar and then passes through the column, while the front part still adopts external routing, and the oil pipe connected to the front brake lower pump directly adopts external routing.

[0003] The exposed brake oil pipe not only has an unsightly appearance, but is also likely to be touched by foreign objects while riding, affecting riding safety and riding experience. At the same time, the oil pipe that passes through the frame needs to be exposed as short as possible for aesthetic reasons, but this creates a new problem, that is, when the vehicle turns, the oil pipe will be pulled or twisted as the column rotates, which poses a great safety hazard and greatly reduces the life of the oil pipe.

[0004] Therefore, we propose a rotary oil-passing vehicle head structure and a bicycle. Summary of the Invention

[0005] The present application provides a revolving oil-passing front structure and a bicycle to at least solve the problem in the prior art that the brake oil pipe is exposed, which not only has a poor appearance, but also the exposed oil pipe is likely to be touched by foreign objects when riding, affecting riding safety and riding experience; at the same time, when the vehicle turns, the oil pipe passing inside will be pulled or twisted as the column rotates, posing a great safety hazard and greatly reducing the life of the oil pipe.

[0006] In a first aspect, the present application provides a rotary oil-passing vehicle head structure, which is used in conjunction with a bicycle frame, and includes:

[0007] a front fork stem, which is rotatably mounted on the front portion of the bicycle frame;

[0008] An inner core member includes at least a first core portion and a second core portion arranged in sequence in the axial direction, a first annular groove, a second annular groove, and a third annular groove being sequentially defined on an annular outer wall of the second core portion, a lower portion of the first core portion being fixedly mounted on the upper end of the front fork stem, a first oil passage and a second oil passage being axially defined inside the inner core member, a first end of the first oil passage being connected to the first annular groove, and a second end being connected to the free end of the first core portion to form a first oil outlet, and two ends of the second oil passage being connected to the second annular groove and the third annular groove, respectively;

[0009] The rotating member at least comprises a rotating sleeve, the rotating sleeve being movably sleeved on a position of the second core portion corresponding to the third annular groove, and having a second oil outlet radially connected to the third annular groove on a side wall thereof corresponding to the third annular groove;

[0010] An oil sleeve assembly includes at least an oil sleeve body, which is fixedly sleeved on the second core portion at positions corresponding to the first annular groove and the second annular groove, and a first oil inlet radially connected to the first annular groove is provided on the side wall corresponding to the first annular groove, and a second oil inlet radially connected to the second annular groove is provided on the side wall corresponding to the second annular groove.

[0011] Optionally, a first annular land portion is provided on the annular side wall of the first core portion, and a second annular land portion is provided at the lower end of the oil sleeve, and the rotating member abuts against the upper edge of the first annular land portion and the lower edge of the second annular land portion for axial positioning.

[0012] Optionally, the oil kit further comprises:

[0013] At least three annular sealing grooves are formed on the inner wall of the oil jacket at an upper position corresponding to the first annular groove, between the first annular groove and the second annular groove, and below the second annular groove;

[0014] There are at least three O-rings, which are respectively disposed in the annular sealing grooves to seal the oil circuits of the first annular groove and the second annular groove.

[0015] Optionally, the rotating member further includes:

[0016] A stepped step is formed on the axial inner wall of the rotating sleeve body and corresponds to the assembly position of the third annular groove, and a first groove and a second groove are sequentially formed on both sides of the axial inner wall of the rotating sleeve body, wherein the second oil outlet is opened at a position corresponding to the middle of the stepped step;

[0017] Two rotary sealing rings are respectively installed in the first groove and sleeved on the annular outer wall of the first core to seal the oil passage of the third annular groove;

[0018] Two ball bearings are respectively assembled in the second slots and the inner rings of the ball bearings are connected to the first core to maintain the rotation of the rotating member on the inner core.

[0019] Optionally, after assembly, the facing sides of the two ball bearings are both pressed and axially positioned to form the rotary seal ring.

[0020] Optionally, a tensioning member is provided at the upper end of the oil sleeve, and the tensioning member is used to fix the oil sleeve body on the second core portion.

[0021] Optionally, the tensioning member includes:

[0022] an expansion cavity, which is opened at the upper end of the axial middle portion of the oil sleeve body, so as to cooperate with the second core part to form an annular expansion assembly groove after the second core part is installed;

[0023] There is at least one tensioning ring, which is assembled in the tensioning assembly groove;

[0024] An upper gland, having a pressure edge portion at its lower end and connected to the upper end of the second core portion via axially arranged gland bolts;

[0025] The lower end of the oil sleeve body abuts against the step surface formed between the first core part and the second core part, and the edge pressing part squeezes the expansion ring to tighten and fix the oil sleeve body and the inner core member downward.

[0026] Optionally, a headset is mounted on the front fork stem, and a headset bolt for adjusting the inner diameter of the headset is provided on the headset. The front fork stem is mounted on the lower end of the first core portion and is fixed by being pressed against the outside of the headset, and the headset abuts against the lower edge of the first ring portion.

[0027] Optionally, the first oil inlet is connected to the front brake pump via a first oil pipe; the second oil inlet is connected to the rear brake pump via a second oil pipe;

[0028] The first oil outlet is connected to the front brake pump through a third oil pipe, and the second oil outlet is connected to the rear brake pump through a fourth oil pipe.

[0029] In a second aspect, the present application provides a bicycle comprising the rotary oil-passing bow structure of the first aspect.

[0030] Compared with the related art, the rotary oil-passing head structure and bicycle provided by this application have at least the following technical effects:

[0031] The oil pipe is concealed when the bicycle is loaded onto a vehicle, and when the bicycle turns, the inner core member and the front fork seat tube are driven to rotate synchronously by the oil kit to realize the steering function. The third oil pipe inserted into the front fork of the bicycle is fully concealed and can rotate with the steering without being twisted or damaged by the steering. The rotating member is movably sleeved on the inner core member, so the fourth oil pipe connected to the second oil outlet on the rotating member will not be twisted or damaged by the steering. There is no need to reserve a length of the fourth oil pipe exposed for steering, and the assembly can be concealed as much as possible, thereby improving the appearance of the loading and avoiding damage to the exposed oil pipe.

[0032] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a stereoscopic view of a rotary oil-passing vehicle head structure according to an exemplary embodiment.

[0035] Figure 2 1 is an exploded view of a rotary oil-passing vehicle head structure according to an exemplary embodiment.

[0036] Figure 3 It is a cross-sectional view of a rotary oil-passing vehicle head structure according to an exemplary embodiment.

[0037] Figure 4 It is a schematic assembly diagram of a rotary oil-passing vehicle head structure according to an exemplary embodiment.

[0038] Explanation of reference numerals: inner core 10; first core portion 101; first annular portion 102; bowl assembly positioning groove 1021; second core portion 103; first annular groove 104; second annular groove 105; third annular groove 106; first oil passage 107; second oil passage 108; first oil outlet 109;

[0039] Oil sleeve 20; oil sleeve body 201; second ring platform 202; annular sealing groove 203; first oil inlet 204; second oil inlet 205;

[0040] Tensioning member 30; tensioning ring 301; tensioning groove 302; upper gland 303, gland bolt 304;

[0041] Rotating member 40; rotating sleeve 401; stepped step 402, second oil outlet 403; bearing 404; rotating sealing ring 405;

[0042] Front fork stem 50 ; headset 60 ; headset bolt 601 ; first oil pipe 701 ; second oil pipe 702 ; third oil pipe 703 ; fourth oil pipe 704 ; handlebar stem 80 . DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0046] In the related art, the brake oil pipe is exposed, which not only has a poor appearance, but also is likely to be touched by foreign objects during riding, affecting riding safety and riding experience. At the same time, the oil pipe that passes through the frame needs to be exposed as short as possible for aesthetic reasons, but this creates a new problem, that is, when the vehicle turns, the oil pipe will be pulled or twisted as the column rotates, which poses a great safety hazard and greatly reduces the life of the oil pipe.

[0047] Based on the above situation, an embodiment of the present invention provides a rotating oil-passing front structure and a bicycle, which are described in detail below with reference to specific embodiments and drawings.

[0048] Example 1

[0049] An embodiment of the present invention provides a rotary oil-passing vehicle head structure. Figure 1 It is a stereoscopic view of a rotary oil-passing vehicle head structure according to an exemplary embodiment. Figure 2 1 is an exploded view of a rotary oil-passing vehicle head structure according to an exemplary embodiment. Figure 3 FIG. 1 is a cross-sectional view of a rotary oil-passing vehicle head structure according to an exemplary embodiment. Figure 1-3 As shown, the rotary oil-passing vehicle head structure is used in conjunction with a bicycle frame and includes:

[0050] The front fork stem 50 is rotatably mounted on the front portion of the bicycle frame. In this embodiment, the front fork stem 50 is the upper portion of the bicycle front fork, and the lower portion is used to mount the front wheel and the front brake pump.

[0051] The inner core member 10 comprises at least a first core portion 101 and a second core portion 103 arranged in sequence in the axial direction. A first annular groove 104, a second annular groove 105 and a third annular groove 106 are sequentially provided on the annular outer wall of the second core portion 103 from top to bottom. The lower portion of the first core portion 101 is fixedly inserted into the upper end of the front fork stem 50. A first oil passage 107 and a second oil passage 108 are axially provided inside the inner core member 10. The first end of the first oil passage 107 is connected to the first annular groove 104, and the second end is connected to the free end of the first core portion 101 to form a first oil outlet 109. The two ends of the second oil passage 108 are respectively connected to the second annular groove 105 and the third annular groove 106. In this embodiment, refer to the attached Figure 3 The diameter R1 of the first core portion 101 is greater than the diameter R2 of the second core portion 103 , so that a step surface is formed between the first core portion 101 and the second core portion 103 to position the lower edge of the oil sleeve 20 ;

[0052] The rotating member 40 includes at least a rotating sleeve 401. The rotating sleeve 401 is movably mounted on a position of the second core portion 103 corresponding to the third annular groove 106. A second oil outlet 403 is provided on a side wall thereof corresponding to the third annular groove 106 and radially communicates with the third annular groove 106. In this embodiment, the third annular groove 106 cooperates with the inner wall of the rotating sleeve 401 to form a third annular oil passage.

[0053] The oil sleeve 20 at least includes an oil sleeve body 201, which is fixedly sleeved on the position of the second core portion 103 corresponding to the first annular groove 104 and the second annular groove 105, and a first oil inlet 204 radially connected to the first annular groove 104 is provided on the side wall corresponding to the first annular groove 104, and a second oil inlet 205 radially connected to the second annular groove 105 is provided on the side wall corresponding to the second annular groove 105. In this embodiment, the first annular groove 104 and the second annular groove 105 cooperate with the inner wall of the rotating sleeve body 401 to form a first annular oil channel and a second annular oil channel.

[0054] In the technical solutions of the above embodiments, please refer to the attached Figure 1-3, the first oil inlet 204 is connected to the front brake upper pump through the first oil pipe 701; the second oil inlet 205 is connected to the rear brake upper pump through the second oil pipe 702; the first oil outlet 109 is connected to the front brake lower pump through the third oil pipe 703, and the second oil outlet 403 is connected to the rear brake lower pump through the fourth oil pipe 704; it can be understood that the third oil pipe 703 can be pre-assembled with an oil pipe quick connector to achieve quick connection. The oil pipe quick connector is a prior art and those skilled in the art can obtain it from public channels. In the use of this exemplary embodiment The oil pipe quick-connect structure disclosed in National Patent ZL202411928412.1 will not be described in detail here. The third oil pipe 703 runs inside the front fork of the bicycle and extends near the front brake lower pump to connect to the front brake lower pump, achieving a fully concealed assembly of the third oil pipe 703. The second oil outlet 403 is close to the bicycle frame, and the fourth oil pipe 704 can directly pass through the bicycle frame nearby and extend near the rear brake lower pump to connect to the rear brake lower pump, thereby minimizing exposure of the fourth oil pipe 704 and achieving concealed assembly.

[0055] When the bicycle turns, the oil kit 20 drives the inner core member 10 and the front fork stem 50 to rotate synchronously to realize the steering function. The third oil pipe 703 inserted into the front fork of the bicycle is fully hidden in the front fork of the bicycle, and the third oil pipe 703 can rotate with the steering, and will not cause the oil pipe to be twisted or damaged due to rotation. The rotating member 40 is movably mounted on the inner core member 10, so the fourth oil pipe 704 connected to the second oil outlet 403 on the rotating member 40 will not rotate with the steering to cause the oil pipe to be twisted or damaged. There is no need to reserve an exposed steering length for the oil pipe, and it can be hidden inside to improve the appearance of the vehicle and avoid damage to the exposed oil pipe.

[0056] In this embodiment, when the front brake upper pump brakes, the input oil is injected into the first oil inlet 204 through the first oil pipe 701, and then the oil reaches the first oil channel 107 through the first annular groove 104, and is output to the front brake lower pump through the third oil pipe 703 through the first oil outlet 109, for hydraulic braking; when the rear brake upper pump brakes, the input oil is injected into the second oil inlet 205 through the second oil pipe 702, and then the oil reaches the second oil channel 108 through the second annular groove 105 and enters the third annular groove 106, and is output to the rear brake lower pump through the second oil outlet 403 through the fourth oil pipe 704, for hydraulic braking.

[0057] In this embodiment, continue to refer to the attached Figure 3 A first annular land portion 102 is provided on the annular side wall of the first core portion 101, and a second annular land portion 202 is provided at the lower end of the oil sleeve 20. The rotating member 40 abuts against the upper edge of the first annular land portion 102 and the lower edge of the second annular land portion 202 for axial positioning;

[0058] A headset 60 is mounted on the stem 50 , and a headset bolt 601 is provided on the headset 60 for adjusting the inner diameter of the headset 60 . The stem 50 is mounted on the lower end of the first core 101 and is tightened and secured by the exterior of the headset 60 , with the headset 60 abutting the lower edge of the first ring portion 102 .

[0059] In this embodiment, the provision of the second annular platform 202 facilitates the positioning of the inner core member 10 and the front fork stem 50 in the axial assembly position, and also provides a lower edge for the positioning of the rotating member 40, thereby facilitating the rapid assembly of the rotating oil-passing vehicle head structure.

[0060] In an alternative embodiment, referring to the attached Figure 1-3 The oil kit 20 also includes:

[0061] There are at least three annular sealing grooves 203 formed on the inner wall of the oil sleeve body 201, respectively, at an upper portion corresponding to the first annular groove 104, between the first annular groove 104 and the second annular groove 105, and below the second annular groove 105.

[0062] At least three O-rings are disposed in the annular sealing grooves 203 to seal the oil passages of the first annular groove 104 and the second annular groove 105 .

[0063] The rotating member 40 further includes:

[0064] The step 402 is formed on the axial inner wall of the rotating sleeve 401 and corresponds to the assembly position of the third annular groove 106. The first groove and the second groove are formed in sequence on both sides of the axial inner wall of the rotating sleeve 401. The second oil outlet 403 is opened in the middle position corresponding to the step 402.

[0065] Two rotary sealing rings 405 are respectively installed in the first groove and sleeved on the annular outer wall of the first core 101 to seal the oil path of the third annular groove 106;

[0066] There are two ball bearings 404, which are respectively assembled in the second slot and their inner rings are connected to the first core part 101 to maintain the rotational assembly of the rotating part 40 on the inner core part 10; after assembly, the facing sides of the two ball bearings 404 are tightened and axially positioned to position the rotating sealing ring 405; in this embodiment, the ball bearings 404 are deep groove ball bearings.

[0067] In the technical solution of the above embodiment, the setting of the O-ring and the rotary sealing ring 405 effectively ensures the sealing of the three annular oil circuits, prevents oil leakage and avoids dust entry. At the same time, the setting of the ball bearing 404 also reduces the rotational friction of the rotating part 40 on the inner core part 10, and the steering is smooth without damaging the oil circuit.

[0068] In an alternative embodiment, referring to the attached Figure 1-3 The upper end of the oil sleeve 20 is provided with a tensioning member 30, which is used to fix the oil sleeve body 201 on the second core 103. The tensioning member 30 includes:

[0069] The expansion cavity 302 is formed at the upper end of the axial middle portion of the oil sleeve body 201 to form an annular expansion assembly groove with the second core part 103 after the second core part 103 is installed;

[0070] There is at least one tensioning ring 301, which is assembled in the tensioning assembly groove;

[0071] The upper gland 303 has a pressure edge portion at its lower end and is connected to the upper end of the second core portion 103 via axially arranged gland bolts 304;

[0072] The lower end of the oil sleeve body 201 abuts against the step surface formed between the first core part 101 and the second core part 103 , and the edge pressing portion squeezes the expansion ring 301 to tighten and fix the oil sleeve body 201 and the inner core member 10 downward.

[0073] In the technical solution of the above embodiment, during assembly, the fourth oil pipe 704 is first passed through the bicycle frame, and the third oil pipe 703 is connected to the first oil outlet 109 through the oil pipe connector. Then, the third oil pipe 703 is passed through the front fork of the bicycle, and the second end of the third oil pipe 703 is passed out near the front brake lower pump.

[0074] The lower portion of the inner core 10 is inserted into the upper end of the front fork stem 50 and fastened to the outside of the headset 60. The rotating member 40, the oil sleeve 20, and the tensioning member 30 are then assembled in sequence to complete the main assembly.

[0075] The fourth oil pipe 704 is connected to the second oil outlet 403, the first oil inlet 204 is connected to the first oil pipe 701, and the second oil inlet 205 is connected to the second oil pipe 702 to complete the oil circuit connection.

[0076] Figure 4 This is a schematic diagram of the assembly of a rotary oil-passing vehicle head structure according to an exemplary embodiment. Figure 4 The stem tube 80 is fixedly assembled on the oil sleeve body 201, and the first oil pipe 701 and the second oil pipe 702 can be hidden in the tube cavity of the stem tube 80 to realize hidden assembly of the oil pipes. Furthermore, the first oil pipe 701 and the second oil pipe 702 can also be passed through the handle tube and extended near the brake handle or directly connected to the brake handle to realize fully hidden routing of the oil pipes, which has a good oil pipe protection effect and improves the aesthetics of the frame installation.

[0077] In summary, the rotating oil-passing head structure provided by the embodiment of the present invention realizes the hidden assembly of the oil pipe when the bicycle is loaded, and when the bicycle turns, the oil kit 20 drives the inner core member 10 and the front fork stem 50 to rotate synchronously to realize the steering function. The third oil pipe 703 passed through the front fork of the bicycle is fully hidden in the front fork of the bicycle, and the third oil pipe 703 can rotate with the steering and will not be twisted and damaged by the steering. The rotating member 40 is movably mounted on the inner core member 10, so the fourth oil pipe 704 connected to the second oil outlet 403 on the rotating member 40 will not be twisted and damaged by the steering. There is no need to reserve the exposed steering length of the fourth oil pipe 704, and it can be hidden as much as possible to improve the appearance of the loading and avoid damage to the exposed oil pipe.

[0078] Example 2

[0079] Embodiment 2 of the present invention provides a bicycle including the rotating oil-passing front structure of embodiment 1.

[0080] For other structures not described, refer to Example 1.

[0081] In summary, the rotating oil-passing head structure and bicycle provided by the embodiments of the present invention realize the hidden assembly of the oil pipe when the bicycle is loaded, and when the bicycle turns, the oil kit 20 drives the inner core member 10 and the front fork stem 50 to rotate synchronously to realize the steering function. The third oil pipe 703 passed through the front fork of the bicycle is fully hidden in the front fork of the bicycle, and the third oil pipe 703 can rotate with the turning, and will not be twisted and damaged by the turning. The rotating member 40 is movably mounted on the inner core member 10, so the fourth oil pipe 704 connected to the second oil outlet 403 on the rotating member 40 will not be twisted and damaged by the turning. There is no need to reserve the exposed steering length of the fourth oil pipe 704, and it can be hidden as much as possible, thereby improving the appearance of the loading and avoiding damage to the exposed oil pipe.

[0082] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A rotary oil-passing vehicle head structure, used in conjunction with a bicycle frame, characterized in that: Included are: A front fork riser, which is rotatably mounted on the front portion of the bicycle frame; An inner core component at least comprises a first core portion and a second core portion which are arranged in sequence in the axial direction, a first annular groove, a second annular groove and a third annular groove are sequentially formed on the annular outer wall of the second core portion, a lower portion of the first core portion is fixedly assembled to the upper end of the front fork riser, a first oil passage and a second oil passage are axially formed inside the inner core component, a first end of the first oil passage is connected to the first annular groove, and a second end is connected to the free end of the first core portion to form a first oil outlet, and two ends of the second oil passage are respectively connected to the second annular groove and the third annular groove; The rotating member at least comprises a rotating sleeve, wherein the rotating sleeve is movably sleeved at a position of the second core corresponding to the third annular groove, and a second oil outlet radially connected to the third annular groove is provided on a side wall thereof corresponding to the third annular groove; An oil sleeve assembly at least comprises an oil sleeve body, wherein the oil sleeve body is fixedly sleeved on a position of the second core portion corresponding to the first annular groove and the second annular groove, and a first oil inlet radially connected to the first annular groove is provided on a side wall corresponding to the first annular groove, and a second oil inlet radially connected to the second annular groove is provided on a side wall corresponding to the second annular groove.

2. The rotary oil-passing car head structure according to claim 1, characterized in that: A first annular land portion is disposed on the annular side wall of the first core portion, and a second annular land portion is disposed at the lower end of the oil sleeve, and the rotating member abuts against an upper edge of the first annular land portion and a lower edge of the second annular land portion for axial positioning.

3. The rotary oil-passing car head structure according to claim 1, characterized in that: The oil kit also includes: At least three annular sealing grooves are formed on the inner wall of the oil jacket body at an upper position corresponding to the first annular groove, a position between the first annular groove and the second annular groove, and a lower position of the second annular groove; At least three O-rings are disposed in the annular sealing grooves respectively to seal the oil paths of the first annular groove and the second annular groove.

4. The rotary oil-passing car head structure according to claim 1, characterized in that: The rotating member also includes: A stepped step is formed on the axial inner wall of the rotating sleeve body and corresponds to the assembly position of the third annular groove, and the first groove and the second groove are sequentially formed on both sides of the axial inner wall of the rotating sleeve body, wherein the second oil outlet is opened at a middle position corresponding to the stepped step; Two rotary sealing rings are respectively installed in the first grooves and sleeved on the annular outer wall of the first core to seal the oil passage of the third annular groove; Two ball bearings are respectively installed in the second slots and their inner rings are connected to the first core to maintain the rotational assembly of the rotating member on the inner core.

5. The rotary oil-passing car head structure according to claim 4 is characterized in that: After being assembled, the facing sides of the two ball bearings are both pressed and axially positioned to position the rotary seal ring.

6. The rotary oil-passing car head structure according to claim 1, characterized in that: A tensioner is provided at the upper end of the oil sleeve, and the tensioner is used to fix the oil sleeve body on the second core part.

7. The rotary oil-passing car head structure according to claim 6, characterized in that: The tensioning member comprises: A tightening cavity is provided at the upper end of the axial middle portion of the oil sleeve body, so as to cooperate with the second core part to form an annular tightening assembly groove after the second core part is installed; There is at least one tensioning ring, which is assembled in the tensioning assembly groove; An upper gland, the lower end of which has a pressure edge portion, which is connected to the upper end of the second core portion through axially arranged gland bolts; The lower end of the oil sleeve body abuts against the step surface formed between the first core part and the second core part, and the edge pressing part squeezes the tensioning ring to tighten and fix the oil sleeve body and the inner core member downward.

8. The rotary oil-passing car head structure according to claim 1, characterized in that: A headset is sleeved on the front fork riser, and a headset bolt for adjusting the inner diameter of the headset is provided on the headset. The front fork riser is sleeved on the lower end of the first core portion and is pressed and fixed by the outside of the headset, and the headset abuts against the lower edge of the first ring platform portion.

9. The rotary oil-passing car head structure according to claim 1, characterized in that: The first oil inlet is connected to the front brake upper pump through a first oil pipe; the second oil inlet is connected to the rear brake upper pump through a second oil pipe; The first oil outlet is connected to the front brake pump via the third oil pipe, and the second oil outlet is connected to the rear brake pump via the fourth oil pipe.

10. A bicycle, characterized in that: The invention comprises the rotary oil-passing vehicle head structure as described in claims 1 to 9 above.

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