Rotary oil passing bicycle head structure and bicycle

Abstract

The utility model relates to a rotary oil passing bicycle head structure and a bicycle. The rotary oil passing bicycle head structure comprises a front fork stand pipe, a front fork, a rear fork stand pipe and a rear fork stand pipe, 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, and the position, corresponding to the third ring groove, of the second core part is movably sleeved with the rotating sleeve body; and the oil sleeve piece comprises an oil sleeve body, the oil sleeve body is fixedly arranged at the position, corresponding to the first ring groove and the second ring groove, of the second core part in a sleeving mode, and a first oil inlet communicating with the first ring groove in the radial direction is formed in the side wall, corresponding to the first ring groove, of the oil sleeve body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle accessory technical field, concretely relates to a rotary oil passing front structure and bicycle. BACKGROUND

[0002] At present, the brake oil pipe wiring mode of various bicycles commonly seen on the market mainly adopts the inside wiring of the frame part, that is, the oil pipe connected with the rear brake lower pump is extended to the inside of the column when the oil pipe is connected with the front brake lower pump, and the oil pipe is directly connected with the outside wiring mode.

[0003] The exposed brake oil pipe not only has poor appearance, but also the exposed oil pipe may be touched by external objects during riding, which affects the riding safety and riding experience; at the same time, the oil pipe inside the frame part needs to be as short as possible for the sake of appearance, but this generates a new problem, that is, when the vehicle turns, the inside oil pipe is pulled and dragged or twisted with the rotation of the column, which has great safety hazards and greatly reduces the service life of the oil pipe.

[0004] Therefore, we propose a rotary oil passing front structure and bicycle. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a rotary oil passing front structure and bicycle to at least solve the problems that the exposed brake oil pipe not only has poor appearance, but also the exposed oil pipe may be touched by external objects during riding, which affects the riding safety and riding experience; at the same time, when the vehicle turns, the inside oil pipe is pulled and dragged or twisted with the rotation of the column, which has great safety hazards and greatly reduces the service life of the oil pipe.

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

[0007] The front fork stand pipe is rotationally assembled at the front of the bicycle frame;

[0008] The inner core member at least includes an axially arranged first core part and a second core part, the annular outer wall of the second core part is sequentially provided with a first ring groove, a second ring groove and a third ring groove, the lower part of the first core part is fixedly assembled to the upper end of the front fork stand pipe, the inside of the inner core member is axially provided with a first oil channel and a second oil channel, the first end of the first oil channel is communicated with the first ring groove, and the second end is communicated to the free end of the first core part to form a first oil outlet, and the two ends of the second oil channel are respectively communicated with the second ring groove and the third ring groove;

[0009] A rotating member, at least comprising a rotating sleeve, the rotating sleeve movably sleeving the second core part at a position corresponding to the third annular groove, and a second oil outlet radially communicating with the third annular groove being arranged on a side wall corresponding to the third annular groove;

[0010] An oil jacket, at least comprising an oil jacket body, the oil jacket body fixedly sleeving the second core part at a position corresponding to the first annular groove and the second annular groove, a first oil inlet radially communicating with the first annular groove being arranged on a side wall corresponding to the first annular groove, and a second oil inlet radially communicating with the second annular groove being arranged on a side wall corresponding to the second annular groove.

[0011] Optionally, a first annular shoulder is arranged on the annular side wall of the first core part, and a second annular shoulder is arranged on the lower end of the oil jacket, the rotating member abutting the upper edge of the first annular shoulder and the lower edge of the second annular shoulder to be axially positioned.

[0012] Optionally, the oil jacket further comprises:

[0013] Annular sealing grooves, at least three, respectively formed on the inner wall of the oil jacket body at a position corresponding to the upper part of the first annular groove, a position between the first annular groove and the second annular groove, and a position corresponding to the lower part of the second annular groove;

[0014] O-shaped sealing rings, at least three, respectively arranged in the annular sealing grooves to seal the oil paths of the first annular groove and the second annular groove.

[0015] Optionally, the rotating member further comprises:

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

[0017] Rotating sealing rings, two, respectively assembled in the first grooves and sleeving the annular outer wall of the first core part to seal the oil path of the third annular groove;

[0018] Ball bearings, two, respectively assembled in the second grooves, and the inner rings of the ball bearings being connected with the first core part to maintain the rotating assembly of the rotating member on the inner core member.

[0019] Optionally, the opposite sides of the two ball bearings are pressed and axially position the rotating sealing rings after assembly.

[0020] Optionally, the upper end of the oil jacket is provided with a tensioning member, and the tensioning member is used to fixedly assemble the oil jacket body on the second core part.

[0021] Optionally, the tensioning member comprises:

[0022] a tensioning cavity is formed in the upper end of the middle part of the oil jacket body in the axial direction to form an annular tensioning assembly groove with the second core part after the second core part is assembled;

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

[0024] an upper gland has a pressing edge at the lower end, which is connected to the upper end of the second core part by an axially arranged gland bolt;

[0025] wherein the lower end of the oil jacket body abuts the stepped surface formed between the first core part and the second core part, and the pressing edge extrudes the tensioning ring to downwardly tension and fix the oil jacket body and the inner core member.

[0026] Optionally, a bowl set is sleeved on the front fork stand pipe, and a bowl set bolt is arranged on the bowl set to adjust the inner diameter of the bowl set, the front fork stand pipe is sleeved on the lower end of the first core part and is pressed tightly through the outside of the bowl set to be fixed, and the bowl set abuts the lower edge of the first ring platform.

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

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

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

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

[0031] The oil pipe hidden assembly when the bicycle is loaded is realized, and when the bicycle turns, the inner core member and the front fork stand pipe are driven to rotate synchronously by the oil jacket member to realize the turning function, the third oil pipe which is internally sleeved in the front fork of the bicycle is assembled in the front fork in a fully hidden manner, and the third oil pipe can rotate with the turning and will not be twisted and damaged, the fourth oil pipe connected to the second oil outlet of the rotary member will not be twisted and damaged with the turning, and the fourth oil pipe does not need to be reserved with an exposed turning length, can be assembled in a fully hidden manner as much as possible, improves the loading aesthetics, and avoids damage caused by the exposure of the oil pipe.

[0032] The details of one or more embodiments of the application are presented in the following drawings and description to make other features, objects and advantages of the application more clear and easy to understand. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0034] Figure 1 It is a perspective view of a rotary oiling vehicle bow structure according to an exemplary embodiment.

[0035] Figure 2 It is an exploded view of a rotary oiling vehicle bow structure according to an exemplary embodiment.

[0036] Figure 3 It is a sectional view of a rotary oiling vehicle bow structure according to an exemplary embodiment.

[0037] Figure 4 It is an assembly schematic view of a rotary oiling vehicle bow structure according to an exemplary embodiment.

[0038] Legend: inner core 10; first core 101; first ring table part 102; bowl group positioning groove 1021; second core 103; first ring groove 104; second ring groove 105; third ring groove 106; first oil channel 107; second oil channel 108; first oil outlet 109;

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

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

[0041] Rotary member 40; rotary sleeve body 401; hierarchical step 402, second oil outlet 403; bearing 404; rotary sealing ring 405;

[0042] Front fork vertical pipe 50; bowl group 60; bowl group bolt 601; first oil pipe 701; second oil pipe 702; third oil pipe 703; fourth oil pipe 704; handle vertical pipe 80. DETAILED DESCRIPTION

[0043] The technical solutions of the utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0044] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0046] In the related art, the brake oil pipe is exposed, which not only has poor appearance, but also the exposed oil pipe may be touched by external objects during riding, affecting the riding safety and riding experience; at the same time, the oil pipe inserted into the frame part needs to be as short as possible for the sake of appearance, but this generates a new problem, that is, when the vehicle turns, the inserted oil pipe will be pulled and dragged or twisted with the rotation of the column, which has great safety hazards and greatly reduces the service life of the oil pipe.

[0047] Based on the above situation, the utility model embodiment provides a rotary oil passing bicycle head structure and a bicycle, which will be described in detail below in combination with specific embodiments and drawings.

[0048] Embodiment 1

[0049] The utility model embodiment provides a rotary oil passing bicycle head structure. Figure 1 It is a perspective view of the rotary oil passing bicycle head structure according to an exemplary embodiment. Figure 2 It is an exploded view of the rotary oil passing bicycle head structure according to an exemplary embodiment. Figure 3 It is a sectional view of the rotary oil passing bicycle head structure according to an exemplary embodiment. AsFigures 1-3 As shown in the figure, the rotary oil return vehicle bow structure, which is used in combination with a bicycle frame, comprises:

[0050] The front fork stand pipe 50 is rotatably assembled at the front part of the bicycle frame; in the embodiment, the front fork stand pipe 50 is the upper half of the bicycle front fork, and the lower part is used to assemble the front wheel and the front brake lower pump;

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

[0052] The rotary member 40 at least comprises a rotary sleeve body 401, the rotary sleeve body 401 movably sleeves the position corresponding to the third ring groove 106 of the second core part 103, and the side wall corresponding to the third ring groove 106 is provided with a second oil outlet 403 radially communicated with the third ring groove 106; in the embodiment, the third ring groove 106 cooperates with the inner wall of the rotary sleeve body 401 to form a third annular oil channel;

[0053] The oil sleeve 20 at least comprises an oil sleeve body 201, the oil sleeve body 201 fixedly sleeves the position corresponding to the first ring groove 104 and the second ring groove 105 of the second core part 103, and the side wall corresponding to the first ring groove 104 is provided with a first oil inlet 204 radially communicated with the first ring groove 104, and the side wall corresponding to the second ring groove 105 is provided with a second oil inlet 205 radially communicated with the second ring groove 105, in the embodiment, the first ring groove 104 and the second ring groove 105 cooperate with the inner wall of the rotary sleeve body 401 to form a first annular oil channel and a second annular oil channel.

[0054] In the technical solution of the above embodiment, referring to the attached Figures 1-3The first oil inlet 204 is connected to the front brake upper pump via the first oil pipe 701; the second oil inlet 205 is connected to the rear brake upper pump via the second oil pipe 702; the first oil outlet 109 is connected to the front brake lower pump via the third oil pipe 703, and the second oil outlet 403 is connected to the rear brake lower pump via the fourth oil pipe 704. It is understood that a quick-connect coupling can be pre-installed on the third oil pipe 703 to facilitate quick connection. The quick-connect coupling is prior art and can be obtained from publicly available information by those skilled in the art. In this exemplary embodiment... The quick-connect structure of the hydraulic hose disclosed in Chinese Patent ZL202411928412.1 will not be described in detail here. The third hydraulic hose 703 runs inside the bicycle front fork and extends out near the front brake down pump to connect to the front brake down pump, thus achieving a fully concealed assembly of the third hydraulic hose 703. The second oil outlet 403 is close to the bicycle frame, and the fourth hydraulic hose 704 can directly and nearby pass into the bicycle frame and extend out near the rear brake down pump to connect to the rear brake down pump, thereby minimizing the exposure of the fourth hydraulic hose 704 and achieving a concealed assembly.

[0055] When the bicycle turns, the oil kit 20 drives the inner core 10 and the fork stem 50 to rotate synchronously to achieve the steering function. The third oil pipe 703, which runs through the bicycle fork, is fully concealed inside the bicycle fork. The third oil pipe 703 can rotate with the steering without being twisted or damaged. The rotating part 40 is movably sleeved on the inner core 10. Therefore, the fourth oil pipe 704 connected to the second oil outlet 403 on the rotating part 40 will not be twisted or damaged with the steering. There is no need to reserve an exposed steering length for the oil pipe. It can be concealed inside the bicycle, improving the aesthetics of the bicycle and avoiding damage from exposed oil pipes.

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

[0057] In this embodiment, please continue to refer to Appendix Figure 3 The first core 101 has a first annular platform 102 on its annular sidewall, and the lower end of the oil kit 20 has a second annular platform 202. The rotating part 40 abuts against the upper edge of the first annular platform 102 and the lower edge of the second annular platform 202 for axial positioning.

[0058] The bowl set 60 is sleeved on the front fork stand pipe 50, and the bowl set bolt 601 for adjusting the inner diameter of the bowl set 60 is arranged on the bowl set 60. The front fork stand pipe 50 is sleeved on the lower end of the first core part 101 and is compressed by the bowl set 60 outside to be fixed, and the bowl set 60 abuts against the lower edge of the first ring table part 102.

[0059] In the embodiment, the second ring table part 202 is arranged to facilitate the positioning of the axial assembly position of the inner core part 10 and the front fork stand pipe 50, and also provides a lower edge for the positioning of the rotating part 40, thereby facilitating the rapid assembly of the rotating oil return vehicle bow structure.

[0060] In an alternative embodiment, continuing to refer to the drawings Figures 1-3 The oil jacket part 20 further comprises:

[0061] The annular sealing grooves 203 are at least three in number and are respectively formed in the inner wall of the oil jacket body 201 at the upper position corresponding to the first ring groove 104, the position between the first ring groove 104 and the second ring groove 105, and the lower position of the second ring groove 105.

[0062] The O-shaped sealing rings are at least three in number and are respectively arranged in the annular sealing grooves 203 to seal the oil paths of the first ring groove 104 and the second ring groove 105.

[0063] The rotating part 40 further comprises:

[0064] The hierarchical step 402 is formed on the axial inner wall of the rotating sleeve body 401 and corresponds to the assembly position of the third ring groove 106, and the two sides of the axial inner wall of the rotating sleeve body 401 are sequentially formed with the first groove and the second groove, wherein the second oil outlet 403 is arranged at the middle position corresponding to the hierarchical step 402.

[0065] The rotating sealing rings 405 are two in number and are respectively assembled in the first grooves and are sleeved on the annular outer wall of the first core part 101 to seal the oil path of the third ring groove 106.

[0066] The ball bearings 404 are two in number and are respectively assembled in the second grooves and the inner rings thereof are connected with the first core part 101 to maintain the rotating assembly of the rotating part 40 on the inner core part 10. The opposite sides of the two ball bearings 404 are compressed and axially position the rotating sealing rings 405 after assembly. In the embodiment, the ball bearings 404 are deep groove ball bearings.

[0067] In the technical solution of the above embodiment, the O-shaped sealing rings and the rotating sealing rings 405 are arranged to effectively ensure the sealing of the three annular oil paths, so that oil leakage does not occur and dust is prevented from entering. Meanwhile, the arrangement of the ball bearings 404 also reduces the rotating friction force of the rotating part 40 on the inner core part 10, so that the steering is smooth and the oil path is not damaged.

[0068] In an alternative embodiment, continuing to refer to the accompanying drawings Figures 1-3 The upper end of the oil sleeve 20 is provided with a tensioning member 30 for fixedly assembling the oil sleeve body 201 on the second core 103, and the tensioning member 30 comprises:

[0069] A tensioning cavity 302 is formed at the upper end of the axial middle part of the oil sleeve body 201 to form an annular tensioning assembly groove in cooperation with the second core 103 after the second core 103 is assembled;

[0070] At least one tensioning ring 301 is assembled in the tensioning assembly groove;

[0071] An upper gland 303 with a pressing edge at the lower end is connected to the upper end of the second core 103 through an axially arranged gland bolt 304;

[0072] The lower end of the oil sleeve body 201 abuts against the stepped surface formed between the first core 101 and the second core 103, and the pressing edge extrudes the tensioning ring 301 to downwardly tension and fix the oil sleeve body 201 and the inner core member 10.

[0073] In the technical solution of the above embodiment, during assembly, the fourth oil pipe 704 is first inserted into the bicycle frame, the third oil pipe 703 is connected to the first oil outlet 109 through the oil pipe joint member, then the third oil pipe 703 is inserted into the front fork, and the second end of the third oil pipe 703 is pulled out from the position close to the front brake.

[0074] The lower part of the inner core member 10 is inserted into the upper end of the front fork standpipe 50 and fastened through the outer part of the bowl set 60, then the upper rotating member 40, the oil sleeve member 20 and the tensioning member 30 are sequentially assembled, and the main body assembly is completed.

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

[0076] Figure 4 is a schematic assembly view of the rotating oil passing bicycle head structure according to an exemplary embodiment. Referring to the accompanying drawings Figure 4 The standpipe 80 is fixedly assembled on the oil sleeve body 201, and the first oil pipe 701 and the second oil pipe 702 can be hiddenly assembled in the pipe cavity of the standpipe 80 to realize hidden assembly of the oil pipes, further, the first oil pipe 701 and the second oil pipe 702 can be inserted in the handle pipe and pulled out near the brake handle or directly connected to the brake handle to realize full hidden wiring of the oil pipes, the oil pipe protection effect is good, and the appearance of the bicycle frame is improved.

[0077] In summary, the rotary oil car head structure provided by the embodiments of the utility model realizes the hidden assembly of the oil pipe when the bicycle is loaded, and when the bicycle turns, the inner core part 10 and the front fork stand pipe 50 are synchronously rotated by the oil sleeve 20 to realize the turning function, the third oil pipe 703 which is internally penetrated in the front fork of the bicycle is fully hidden and assembled 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 with the turning, the rotary part 40 is movably sleeved on the inner core part 10, therefore the fourth oil pipe 704 connected with the second oil outlet 403 on the rotary part 40 will not be twisted and damaged with the turning, the fourth oil pipe 704 does not need to reserve the turning length exposed outside, can be internally penetrated and hidden as much as possible, improves the loading aesthetics, and avoids the damage of the exposed oil pipe.

[0078] Embodiment 2

[0079] The utility model embodiment 2 provides a bicycle, including the rotary oil car head structure of embodiment 1.

[0080] Other undescribed structures refer to embodiment 1.

[0081] In summary, the rotary oil car head structure and the bicycle provided by the embodiments of the utility model realize the hidden assembly of the oil pipe when the bicycle is loaded, and when the bicycle turns, the inner core part 10 and the front fork stand pipe 50 are synchronously rotated by the oil sleeve 20 to realize the turning function, the third oil pipe 703 which is internally penetrated in the front fork of the bicycle is fully hidden and assembled 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 with the turning, the rotary part 40 is movably sleeved on the inner core part 10, therefore the fourth oil pipe 704 connected with the second oil outlet 403 on the rotary part 40 will not be twisted and damaged with the turning, the fourth oil pipe 704 does not need to reserve the turning length exposed outside, can be internally penetrated and hidden as much as possible, improves the loading aesthetics, and avoids the damage of the exposed oil pipe.

[0082] The technical features of the above embodiments can be combined arbitrarily, to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the description.

[0083] The above embodiments only express several implementation manners of the application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, on the premise of not departing from the concept of the application, several modifications and improvements can be made, which belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A rotary oil-passing head structure, used in conjunction with a bicycle frame, characterized in that, Including: The fork stem is rotatably mounted to the front of the bicycle frame; The inner core component includes at least a first core and a second core arranged axially in sequence. The second core has a first annular groove, a second annular groove and a third annular groove arranged axially in sequence on its annular outer wall. The lower part of the first core is fixedly assembled to the upper end of the front fork stem. The inner core component has a first oil passage and a second oil passage arranged axially inside. The first end of the first oil passage is connected to the first annular groove and the second end is connected to the free end of the first core to form a first oil outlet. The two ends of the second oil passage are respectively connected to the second annular groove and the third annular groove. A rotating component, comprising at least a rotating sleeve, wherein the rotating sleeve is movably fitted onto the second core at the position corresponding to the third annular groove, and a second oil outlet radially communicating with the third annular groove is provided on its side wall corresponding to the third annular groove; An oil fitting kit includes at least an oil sleeve body, which is fixedly fitted onto the second core at a position corresponding to the first annular groove and the second annular groove. The oil sleeve body has a first oil inlet radially communicating with the first annular groove on its side wall corresponding to the first annular groove, and a second oil inlet radially communicating with the second annular groove on its side wall corresponding to the second annular groove.

2. The rotary oil-passing head structure as described in claim 1, characterized in that: The first core has a first annular platform on its annular sidewall, and the lower end of the oil kit has a second annular platform. The rotating member abuts against the upper edge of the first annular platform and the lower edge of the second annular platform for axial positioning.

3. The rotary oil-passing head structure as described in 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, respectively at the upper part of the first annular groove, between the first and second annular grooves, and at the lower part of the second annular groove. At least three O-rings are disposed in the annular sealing grooves to seal the oil passages of the first and second annular grooves.

4. The rotary oil-passing head structure as described in claim 1, characterized in that: The rotating component also includes: The stepped structure is formed on the axial inner wall of the rotating sleeve and corresponds to the assembly position of the third annular groove. It is matched with the first groove and the second groove formed on both sides of the axial inner wall of the rotating sleeve in sequence. The second oil outlet is opened at the middle position corresponding to the stepped structure. Two rotary sealing rings are respectively assembled 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. Two ball bearings are respectively assembled in the second slot, and their inner rings are connected to the first core to maintain the rotational assembly of the rotating component on the inner core.

5. The rotary oil-passing head structure as described in claim 4, characterized in that: After the two ball bearings are assembled on opposite sides, they are pressed together and the rotary seal ring is axially positioned.

6. The rotary oil-passing head structure as described in claim 1, characterized in that: The upper end of the oil sleeve is provided with a tensioning member, which is used to fix the oil sleeve body to the second core.

7. The rotary oil-passing head structure as described in claim 6, characterized in that: The tensioning element includes: The tensioning cavity is located at the upper end of the axial middle part of the oil sleeve body, so that after the second core is installed, it forms an annular tensioning assembly groove with the second core. At least one tensioning ring is fitted into the tensioning assembly groove. The upper cap has a pressing edge at its lower end, which is connected to the upper end of the second core by an axially arranged cap bolt; The lower end of the oil sleeve body abuts against the stepped surface formed between the first core and the second core, and the pressing edge portion squeezes the tensioning ring to tighten and fix the oil sleeve body and the inner core component downward.

8. The rotary oil-passing head structure as described in claim 2, characterized in that: The fork riser is fitted with a headset, and the headset is provided with a headset bolt for adjusting the inner diameter of the headset. The fork riser is fitted onto the lower end of the first core and is pressed and fixed by the outside of the headset, and the headset abuts against the lower edge of the first ring platform.

9. The rotary oil-passing head structure as described in claim 1, characterized in that: 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. 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, It includes the rotary oil-passing head structure as described in claims 1-9.

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