A handle stem with internal wiring and universal rotation function

Abstract

A handle post device with internal wiring and universal rotation function, comprising a handle post for connecting a handle and a pipe, the handle post comprising an integrated handle post main body section and a ring section; a wrist group assembled to the ring section; a limiting baffle fixedly connected with the ring section, and the limiting baffle is located at the lower end of the wrist group to limit the wrist group between the handle post and the limiting baffle, and the handle post can freely rotate relative to the wrist group; the handle post main body section and the ring section have a first oil passage in communication with each other, and a first interface in communication with the first oil passage is formed on the outer wall of the handle post main body section; the wrist group has a second oil passage, and a second interface in communication with the second oil passage is formed on the outer wall of the wrist group; when the wrist group is assembled with the handle post, the first oil passage and the second oil passage are in communication with each other. The present application improves the structural stability and overall strength of the handle post, ensures the continuous communication of the oil passage during the free rotation of the handle post relative to the wrist group, and realizes good internal wiring function.

Description

Technical Field

[0001] This utility model relates to the technical field of steering components for vehicles such as bicycles and electric bicycles, and in particular to a stem that combines internal cable routing and omnidirectional rotation. Background Technology

[0002] In the structure of bicycles, e-bikes, and other vehicles, the stem is a key component connecting the handlebars and the frame tubes, and its performance directly affects the vehicle's handling and user experience. Currently, existing stems often have some issues in achieving internal cable routing and swivel functionality. In traditional stem systems, the main body and the ring section are often separate structures. This design is not only cumbersome to assemble, but also prone to loosening during long-term use, affecting the overall structural stability. Furthermore, when implementing internal cable routing, improper arrangement of the hydraulic lines or wiring can easily lead to hydraulic line disconnection or wiring entanglement when the stem rotates relative to the wrist assembly, causing the internal cable routing function to fail. In addition, some stem systems have poor sealing performance, allowing fluid leakage in the hydraulic lines during rotation, affecting the normal operation of the system. Therefore, there is an urgent need for a stem device that can simultaneously achieve stable internal cable routing and smooth omnidirectional rotation, and has a stable structure and good sealing performance. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, this utility model provides a stem that combines internal cable routing and omnidirectional rotation, aiming to solve the problems of poor structural stability, easy disconnection of oil circuit during internal cable routing, easy entanglement of wires during omnidirectional rotation, and poor sealing performance of the existing stem device.

[0004] The technical solution of this utility model to solve its technical problem is: a stem that combines internal cable routing and omnidirectional rotation, comprising: The stem, which is used to connect the handlebars and the trolley tube, includes a stem body section and an annular section, the annular section being located at the lower end of the stem body section; A wrist assembly, which is assembled onto the aforementioned annular segment; A limiting stop plate is fixedly connected to the annular section, and the limiting stop plate is located at the lower end of the wrist assembly to limit the wrist assembly between the stem and the limiting stop plate, while the stem can rotate freely relative to the wrist assembly. The main body section and the ring section are integrally formed; The stem body section and the annular section are connected by a first oil passage, and the outer wall of the stem body section is provided with a first interface that communicates with the first oil passage; the wrist assembly is provided with a second oil passage, and the outer wall of the wrist assembly is provided with a second interface that communicates with the second oil passage; when the wrist assembly is assembled with the stem, the first oil passage and the second oil passage are connected to each other.

[0005] The above technical solution has at least the following features: 1. The stem consists of a main body section and an annular section, which are integrally formed, enhancing the overall strength and stability of the stem. A first hydraulic circuit connects the main body section and the annular section, and the first interface on the outer wall of the main body section can be used to connect external equipment or pipelines, facilitating the access and exit of cables or hydraulic fluid. 2. The wrist assembly is mounted on the annular section and has a second hydraulic circuit. The second interface on the outer wall of the annular section connects to the second hydraulic circuit of the wrist assembly. When the wrist assembly is assembled with the stem, the first and second hydraulic circuits are interconnected, allowing for hydraulic fluid distribution without the need for internal hydraulic lines. 3. A limiting stop is fixedly connected to the annular section and located at the lower end of the wrist assembly, limiting the wrist assembly between the stem and the limiting stop while allowing the stem to rotate freely relative to the wrist assembly, thus achieving omnidirectional rotation of the stem and providing greater flexibility for vehicle handling.

[0006] In some preferred embodiments of this utility model, a first telescopic groove is provided on the annular section, and a second telescopic groove is provided on the stem body section, wherein the first telescopic groove and the second telescopic groove are interconnected.

[0007] In some preferred embodiments of this utility model, the first telescopic groove is distributed on the annular section along the horizontal plane, and the second telescopic groove is distributed on the stem body section along the vertical plane.

[0008] In some preferred embodiments of this utility model, the stem body section is further provided with a plurality of fixing holes for cooperating with the first fastener. The fixing holes and the second telescopic groove are intersected and connected to each other. During the process of the first fastener being inserted into the fixing hole, the groove spacing of the second telescopic groove is reduced.

[0009] In some preferred embodiments of this utility model, the first telescopic groove is semi-circular, and the first telescopic groove and the fixing hole are distributed on the same side of the handle.

[0010] In some preferred embodiments of this utility model, the inner wall of the wrist assembly has a first sealing groove and a second sealing groove, and a sealing ring is provided in both the first sealing groove and the second sealing groove. The sealing ring abuts against the outer wall of the annular section and the inner wall of the wrist assembly respectively to form a sealing fit. The second oil passage includes an annular oil guiding section formed on the inner wall of the wrist assembly. The annular oil guiding section has an oil outlet communicating with the second interface, and the annular oil guiding section is located between the first sealing groove and the second sealing groove.

[0011] In some preferred embodiments of the present invention, the first oil circuit includes a vertical oil guiding section disposed inside the stem, and the vertical oil guiding section extends from the stem body section to the annular section. The upper end of the vertical oil guiding section is connected to the first interface; The lower end of the vertical oil guiding section is connected to the annular oil guiding section.

[0012] In some preferred embodiments of this utility model, a first gasket is provided between the upper end of the wrist assembly and the lower end of the stem body section, and a second gasket is provided between the lower end of the wrist assembly and the upper end of the limiting stop plate.

[0013] In some preferred embodiments of this utility model, the limiting baffle is fixedly connected to the annular section by a plurality of second fasteners, and the first fastener is staggered with the first oil passage and the second oil passage.

[0014] In some preferred embodiments of this utility model, the first interface is connected to a first oil pipe adapter, and the second interface is connected to a second oil pipe adapter.

[0015] The beneficial effects of this utility model are as follows: 1. By integrating the main body section and the ring section of the stem into one piece, the structural stability and overall strength of the stem are improved.

[0016] Second, the interconnection design between the first and second oil circuits ensures the continuous connection of the oil circuits during the free rotation of the stem relative to the wrist assembly, achieving excellent internal cable routing function.

[0017] Third, the design of the telescopic groove and fixing hole facilitates the assembly and fastening of the stem, handlebars, and trolley tube.

[0018] IV. The design of the sealing structure effectively prevents liquid leakage in the oil circuit, improving the sealing performance and reliability of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the front-end structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the back-end structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the assembly of the stem, handlebars, and stem.

[0022] Figure 4 This is an exploded view of this utility model.

[0023] Figure 5 It is a cross-sectional view of the stem assembly with the handlebars and frame tubes.

[0024] Figure 6 yes Figure 5 An enlarged schematic diagram of part A in the middle.

[0025] Figure 7 This is a schematic diagram of the handle structure in this utility model.

[0026] Figure 8 This is a schematic diagram of the wrist assembly in this utility model.

[0027] In the diagram: 1. Stem; 11. Stem body section; 111. First interface; 112. Second telescopic groove; 113. Fixing hole; 12. Annular section; 121. First telescopic groove; 13. First oil passage; 131. Vertical oil guide section; 21. Handlebar; 22. Bike tube; 3. Wrist assembly; 31. Second oil passage; 311. Second interface; 312. Annular oil guide section; 313. Oil outlet; 32. First sealing groove; 33. Second sealing groove; 34. First gasket; 35. Second gasket; 4. Limiting stop; 5. First fastener; 6. Sealing ring; 7. Second fastener; 8. First oil pipe adapter; 9. Second oil pipe adapter; 10. Sealing plug. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Reference Figures 1 to 8 A stem that combines internal cable routing and omnidirectional rotation includes: The stem 1 is used to connect the handlebars 21 and the trolley tube 22. The stem 1 includes a stem body section 11 and an annular section 12, with the annular section 12 located at the lower end of the stem body section 11. Wrist assembly 3, which is assembled onto the annular section 12; The limiting baffle 4 is fixedly connected to the annular section 12, and the limiting baffle 4 is located at the lower end of the wrist assembly 3 to limit the wrist assembly 3 between the handlebar 1 and the limiting baffle 4, and the handlebar 1 can rotate freely relative to the wrist assembly 3. The main body section 11 and the annular section 12 are integrally formed; The stem body section 11 and the annular section 12 are connected by a first oil passage 13, and the outer wall of the stem body section 11 is provided with a first interface 111 that communicates with the first oil passage 13; the wrist assembly 3 is provided with a second oil passage 31, and the outer wall of the wrist assembly 3 is provided with a second interface 311 that communicates with the second oil passage 31; when the wrist assembly 3 is assembled with the stem 1, the first oil passage 13 and the second oil passage 31 are connected to each other.

[0032] The above technical solution has at least the following features: 1. The stem 1 is composed of a main body section 11 and an annular section 12, which are integrally formed, enhancing the overall strength and stability of the stem 1. A first oil passage 13 connects the main body section 11 and the annular section 12, and a first interface 111 on the outer wall of the main body section can be used to connect external equipment or pipelines, facilitating the access and exit of cables or oil. 2. The wrist assembly 3 is mounted on the annular section 12, and the wrist assembly 3 has a second oil passage 31. The second interface 311 on the outer wall of the annular section 12 is connected to the second oil passage 31 of the wrist assembly 3. When the wrist assembly 3 is assembled with the stem 1, the first oil passage 13 and the second oil passage 31 are interconnected, allowing the stem 1 to achieve its oil guiding function without the need for an oil pipe. 3. The limiting stop plate 4 is fixedly connected to the annular section 12 and is located at the lower end of the wrist assembly 3. It limits the wrist assembly 3 between the stem 1 and the limiting stop plate 4, while allowing the stem 1 to rotate freely relative to the wrist assembly 3, thereby realizing the universal rotation function of the stem 1 and providing greater flexibility for vehicle control.

[0033] The advantages of the above technical solution are at least as follows: 1. Internal cable routing: Through the internal oil circuit system of the stem 1, problems such as exposed or tangled oil pipes are avoided. This not only makes the vehicle's appearance more concise and aesthetically pleasing, but also reduces wear and interference to the oil pipes from the external environment, improving the service life of the oil pipes and the reliability of the vehicle. 2. Universal rotation function: The stem 1 can rotate freely relative to the wrist assembly 3, allowing the handlebars 21 to be adjusted at multiple angles within a certain range. This meets the personalized needs of different riders and the requirements of different riding scenarios. For example, in off-road riding or urban commuting, riders can flexibly adjust the angle of the handlebars 21 as needed, improving riding comfort and control.

[0034] Reference Figure 7 In some preferred embodiments of this utility model, a first telescopic groove 121 is provided on the annular section 12, and a second telescopic groove 112 is provided on the stem body section 11, wherein the first telescopic groove 121 and the second telescopic groove 112 are interconnected.

[0035] Because the dimensions or product precision of each handlebar 21 and stem 22 vary to some extent, a simple handlebar 21 structure would result in either excessively tight or loose fits between components. To address this deficiency, the adopted structural solution is as follows: the first telescopic groove 121 is distributed horizontally on the annular section 12, and the second telescopic groove 112 is distributed vertically on the stem body section 11. The design of the first telescopic groove 121 and the second telescopic groove 112 increases the flexibility of the stem 1 structure to a certain extent, enabling it to adapt to different usage requirements and enhancing the structure's flexibility and stability.

[0036] Reference Figure 2 , Figure 7More specifically, the stem body section 11 is further provided with several fixing holes 113 for engaging with the first fastener 5. These fixing holes 113 intersect and communicate with the second telescopic groove 112. During the insertion of the first fastener 5 into the fixing hole 113, the groove spacing of the second telescopic groove 112 is reduced. This has the following functions: 1. Precise adjustment and fixation of the stem 1 length: When the stem body section 11 extends or retracts to a suitable length relative to the annular section 12, the first fastener 5 is inserted into the fixing hole 113. As the first fastener 5 is tightened, it exerts pressure on the groove wall of the second telescopic groove 112, reducing the groove spacing and thus tightly clamping the telescopic part. This firmly fixes the stem body section 11 and the annular section 12 in their current relative position, preventing loosening during use and ensuring the stability of the stem 1 length, meeting the rider's needs for riding posture and handling performance. 2. Enhanced structural stability and reliability: The cooperation between the first fastener 5 and the fixing hole 113 and the second telescopic groove 112 ensures a reliable locking effect after the stem 1 is adjusted. Compared to a simple telescopic structure, the addition of a fastening element allows it to withstand greater external forces and vibrations, improving the overall structural stability of the stem 1 and ensuring safety during riding. 3. Easy installation and adjustment: During installation, the rider can first roughly adjust the length of the stem 1 according to their needs, and then precisely fix it by tightening the first fastener 5. The operation is simple and convenient, requiring no complicated tools or techniques, and allows for quick adjustment and fixation of the stem 1's length, improving installation efficiency and ease of use.

[0037] It is important to emphasize that the first telescopic groove 121 is semi-circular. This semi-circular shape helps to evenly distribute forces from different directions, reducing stress concentration. Furthermore, the first telescopic groove 121 and the fixing hole 113 are located on the same side of the handle 1. From an installation perspective, this same-side layout makes operation more convenient for installers. For example, when installing or removing the first fastener 5, because the fixing hole 113 and the telescopic groove are on the same side, tools can reach the operating position more easily, improving installation efficiency.

[0038] Reference Figure 5 , Figure 8In some preferred embodiments of this utility model, the inner wall of the wrist assembly 3 has a first sealing groove 32 and a second sealing groove 33. A sealing ring 6 is provided in both the first sealing groove 32 and the second sealing groove 33, and the sealing ring 6 abuts against the outer wall of the annular section 12 and the inner wall of the wrist assembly 3 respectively to form a sealing fit. The second oil passage 31 includes an annular oil guiding section 312 opened on the inner wall of the wrist assembly 3. The annular oil guiding section 312 has an oil outlet 313 communicating with the second interface 311, and the annular oil guiding section 312 is located between the first sealing groove 32 and the second sealing groove 33. The above sealing scheme serves two purposes: First, it enhances sealing performance: the sealing rings 6 in the first sealing groove 32 and the second sealing groove 33 abut against the outer wall of the annular section 12 and the inner wall of the wrist assembly 3, respectively, forming a sealing fit. This effectively prevents external impurities such as dust and moisture from entering the wrist assembly 3, while also preventing oil leakage in the internal oil circuit. This protects the internal components and wiring system of the wrist assembly 3, ensuring the normal operation and service life of the stem 1. Second, it ensures unobstructed oil flow: the annular oil guide section 312 of the second oil circuit 31 is located between the first sealing groove 32 and the second sealing groove 33, and its oil outlet 313 communicates with the second interface 311 on the annular section 12. This design ensures smooth oil flow between the first oil circuit 13 and the second oil circuit 31 when the stem 1 rotates omnidirectionally relative to the wrist assembly 3, preventing oil blockage or leakage due to rotation. Thirdly, it improves system reliability: Through the sealing effect of the sealing ring 6 and the oil circuit design of the annular oil guide section 312, the influence of external factors on the internal structure of the stem 1 is reduced, improving the reliability and stability of the entire system. Whether in complex riding environments or during long-term use, it can better ensure the normal operation of the internal cable routing and omnidirectional rotation function of the stem 1, providing riders with a more reliable handling experience.

[0039] Reference Figure 5 , Figure 6More specifically, the oil circuit structure in the handlebar 1 is configured such that the first oil circuit 13 includes a vertical oil guiding section 131 located inside the handlebar 1, extending from the main body section 11 to the annular section 12. The upper end of the vertical oil guiding section 131 is connected to the first interface 111, and the lower end is connected to the annular oil guiding section 312. The function of this structure is twofold: firstly, to ensure smooth oil transmission. The vertical oil guiding section 131, extending from the main body section 11 to the annular section 12, connects to the first interface 111 at its upper end, allowing connection to external oil supply equipment or other related components. Its lower end connects to the annular oil guiding section 312, enabling smooth oil delivery to the annular oil guiding section 312 of the wristband 3. This forms a complete oil transmission channel, ensuring smooth oil flow within the handlebar 1 device and providing a stable oil supply for potential hydraulic control functions. Secondly, it is adapted to the omnidirectional rotation of the stem 1. Since the vertical oil guide section 131 is set along the vertical direction of the stem 1, when the stem 1 rotates omnidirectionally relative to the wrist assembly 3, the position of the vertical oil guide section 131 is relatively stable and not easily affected by the rotation. It can continuously maintain the connection with the first interface 111 and the annular oil guide section 312, thereby ensuring that the transmission of oil will not be interrupted during the rotation of the stem 1, and realizing the omnidirectional rotation function of the stem 1.

[0040] Optionally, refer to Figures 4-6 A first washer 34 is provided between the upper end of the wrist assembly 3 and the lower end of the stem body section 11, and a second washer 35 is provided between the lower end of the wrist assembly 3 and the upper end of the limiting stop plate 4. The washer (first washer 34 and second washer 35) serves two purposes: First, it buffers and absorbs shock between the components. During riding, the stem 1 is subjected to vibrations and impacts from the road surface. The first washer 34 reduces direct collisions and friction between the wrist assembly 3 and the stem body section 11, lowering the risk of wear and damage caused by vibration. Similarly, the second washer 35 buffers the impact force between the limiting stop plate 4 and the wrist assembly 3, extending the service life of each component. Second, it makes the connection between the components tighter and more stable, improving the reliability of the entire stem 1 structure. The first washer 34 ensures a stable connection between the stem body section 11 and the wrist assembly 3, preventing loosening or wobbling during riding. The second shim 35 helps maintain the relative positional stability between the limiting stop 4 and the wrist assembly 3, ensuring that the limiting stop 4 can function effectively and guaranteeing the normal function of the stem 1 and riding safety. Thirdly, it adjusts the spacing and height of components. The first shim 34 can be used to adjust the relative height and spacing between the wrist assembly 3 and the stem body section 11, allowing for precise adjustment of the position of the stem body section 11 relative to the wrist assembly 3. The second shim 35 can be used to adjust the spacing between the wrist assembly 3 and the limiting stop 4, preventing the spacing from being too large or too small, which could affect the overall structural performance.

[0041] Reference Figure 4 , Figure 6 Optionally, the limiting baffle 4 is fixedly connected to the annular section 12 by a plurality of second fasteners 7. This fixed connection reliably restricts the position of related components, preventing displacement or loosening during use. Furthermore, the second fasteners 7 are staggered with the first oil passage 13 and the second oil passage 31, avoiding interference between the mounting holes of the second fasteners 7 and the oil passages, effectively preventing damage to the oil passages, ensuring smooth flow of oil in the first oil passage 13 and the second oil passage 31, and maintaining the normal operation of the hydraulic system or other functions relying on oil transmission. Alternatively, the mounting position of the second fasteners 7 can be aligned with the first oil passage 13 or the second oil passage 31, with a sealing plug 10 placed between them to prevent brake fluid leakage in the first oil passage 13 or the second oil passage 31. These are optional embodiments and are not specifically limited.

[0042] Reference Figure 1 , Figure 4 In this invention, the first interface 111 is connected to a first hydraulic pipe adapter 8, and the second interface 311 is connected to a second hydraulic pipe adapter 9. The first hydraulic pipe adapter 8 is used to connect to the upper brake pump, and the second hydraulic pipe adapter 9 is used to connect to the lower brake pump, thus constructing a complete hydraulic passage. That is, through the connection of the two adapters, the first hydraulic passage 13 inside the stand 1 and the second hydraulic passage 31 of the wrist assembly 3 together form a closed hydraulic passage between the upper and lower brake pumps.

[0043] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A stem that combines internal cable routing and omnidirectional rotation, comprising: A stem (1) is used to connect the handlebars (21) and the trolley tube (22). The stem (1) includes a stem body section (11) and an annular section (12), the annular section (12) being located at the lower end of the stem body section (11). The wrist assembly (3) is assembled onto the annular section (12); The limiting baffle (4) is fixedly connected to the annular section (12), and the limiting baffle (4) is located at the lower end of the wrist assembly (3) to limit the wrist assembly (3) between the handlebar (1) and the limiting baffle (4), and the handlebar (1) can rotate freely relative to the wrist assembly (3). Its features are: The main body section (11) and the annular section (12) are integrally formed; The stem body section (11) and the annular section (12) are connected by a first oil passage (13), and the outer wall of the stem body section (11) is provided with a first interface (111) that communicates with the first oil passage (13); the wrist assembly (3) is provided with a second oil passage (31), and the outer wall of the wrist assembly (3) is provided with a second interface (311) that communicates with the second oil passage (31); when the wrist assembly (3) is assembled with the stem (1), the first oil passage (13) and the second oil passage (31) are connected to each other.

2. The stem with internal cable routing and omnidirectional rotation function as described in claim 1, characterized in that: The annular section (12) is provided with a first telescopic groove (121), and the stem body section (11) is provided with a second telescopic groove (112). The first telescopic groove (121) and the second telescopic groove (112) are interconnected.

3. The stem with internal cable routing and omnidirectional rotation function as described in claim 2, characterized in that: The first telescopic groove (121) is distributed along the horizontal plane on the annular section (12), and the second telescopic groove (112) is distributed along the vertical plane on the handlebar body section (11).

4. The stem with internal cable routing and omnidirectional rotation function as described in claim 2, characterized in that: The stem body section (11) is also provided with a number of fixing holes (113) for cooperating with the first fastener (5). The fixing holes (113) and the second telescopic groove (112) are intersected and connected to each other. During the process of the first fastener (5) being connected to the fixing hole (113), the groove spacing of the second telescopic groove (112) is reduced.

5. The stem with internal cable routing and omnidirectional rotation function as described in claim 4, characterized in that: The first telescopic groove (121) is semi-circular, and the first telescopic groove (121) and the fixing hole (113) are distributed on the same side of the handle (1).

6. The stem with internal cable routing and omnidirectional rotation function as described in claim 1, characterized in that: The inner wall of the wrist assembly (3) has a first sealing groove (32) and a second sealing groove (33). Both the first sealing groove (32) and the second sealing groove (33) are provided with sealing rings (6), and the sealing rings (6) abut against the outer wall of the annular section (12) and the inner wall of the wrist assembly (3) respectively to form a sealing fit. The second oil passage (31) includes an annular oil guiding section (312) opened on the inner wall of the wrist assembly (3). The annular oil guiding section (312) has an oil outlet (313) communicating with the second interface (311), and the annular oil guiding section (312) is located between the first sealing groove (32) and the second sealing groove (33).

7. The stem with internal cable routing and omnidirectional rotation function as described in claim 6, characterized in that: The first oil passage (13) includes a vertical oil guiding section (131) disposed inside the stem (1), and the vertical oil guiding section (131) extends from the stem body section (11) to the ring section (12); The upper end of the vertical oil guiding section (131) is connected to the first interface (111); The lower end of the vertical oil guiding section (131) is connected to the annular oil guiding section (312).

8. The stem with internal cable routing and omnidirectional rotation function as described in claim 1, characterized in that: A first gasket (34) is provided between the upper end of the wrist assembly (3) and the lower end of the stem body section (11), and a second gasket (35) is provided between the lower end of the wrist assembly (3) and the upper end of the limiting stop plate (4).

9. The stem with internal cable routing and omnidirectional rotation function as described in claim 1, characterized in that: The limiting baffle (4) is fixedly connected to the annular section (12) by a number of second fasteners (7), and the first fastener (5) is staggered with the first oil passage (13) and the second oil passage (31).

10. The stem with internal cable routing and omnidirectional rotation function according to any one of claims 1-9, characterized in that: The first interface (111) is connected to a first oil pipe adapter (8), and the second interface (311) is connected to a second oil pipe adapter (9).

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