Angle adjuster for handlebar riser, handlebar riser and bicycle

Abstract

The application discloses an angle adjuster of a handlebar riser pipe, a handlebar riser pipe and a two-wheeled vehicle, and relates to the technical field of bicycles, wherein the angle adjuster comprises a riser pipe mounting assembly, a front fork pipe mounting piece, a tightness adjusting assembly and an angle adjusting disc; the riser pipe mounting assembly is used for mounting a two-wheeled vehicle riser pipe; the front fork pipe mounting piece is used for mounting a two-wheeled vehicle front fork pipe; the front fork pipe mounting piece can rotate relative to the riser pipe mounting assembly, so as to adjust the angle between the front fork pipe and the riser pipe; the tightness adjusting assembly and the angle adjusting disc are used for angle adjustment and angle locking. In this way, the problem of poor riding adaptability caused by the fixed handlebar angle in the prior art is solved.

Description

Technical Field

[0001] This application relates to the technical field of bicycles, and particularly to a handlebar stem angle adjuster, a handlebar stem, and a two-wheeled bicycle. Background Technology

[0002] In existing two-wheeled vehicle technology, especially cargo two-wheeled vehicles, there is a problem that the handlebars are fixed and cannot be adjusted, which makes the vehicles less adaptable to different road conditions, riding postures or cargo loading needs, causing inconvenience to users. Utility Model Content

[0003] The main purpose of this application is to propose a handlebar stem angle adjuster, a handlebar stem, and a two-wheeled vehicle, aiming to improve the ease of use of the two-wheeled vehicle.

[0004] To achieve the above objectives, the handlebar stem angle adjuster proposed in this application includes:

[0005] A riser installation assembly includes a sleeve base, a first ring arm, and a second ring arm. The sleeve base is used to install the riser. The fixed ends of the first ring arm and the second ring arm are respectively connected to the two sides of the sleeve base. The fixed ends of the first ring arm and the second ring arm form a receiving space between their respective free ends.

[0006] A fork tube mounting member, in the shape of a column, is disposed within the receiving space. The two ends of the fork tube mounting member are rotatably disposed in the first ring arm and the second ring arm, respectively. The fork tube mounting member has a fork tube mounting hole arranged radially, which is used to install the fork tube.

[0007] A tension adjustment assembly is connected to the free ends of the first and second ring arms, and is used to drive the first and second ring arms to switch between a clamped state and a released state; in the released state, the fork tube mounting can rotate around the axis to adjust the angle.

[0008] An angle adjustment disc is disposed on the side of the sleeve seat corresponding to the first ring arm away from the fork tube mounting member. The adjustment end of the angle adjustment disc abuts against the end face of the fork tube mounting member. The angle adjustment disc can switch between an unlocked state and a locked state. In the unlocked state, the angle adjustment disc rotates with the fork tube mounting member through the adjustment end to adjust the angle. In the locked state, the adjustment end applies a rotational limiting force to the fork tube mounting member to lock the fork tube mounting member at the corresponding angle.

[0009] In one embodiment, the angle adjustment dial includes:

[0010] A limiting plate, one end of which is disposed on the sleeve seat and extends in the direction away from the opening, the limiting plate having a fourth through hole, and a first locking gear being disposed on the side of the limiting plate facing the front fork tube mounting member;

[0011] The toothed disc has a first side and a second side opposite to each other. The first side of the toothed disc is provided corresponding to the limiting disc, and the second side of the toothed disc is provided corresponding to the front fork tube mounting component. The first side of the toothed disc is provided with a pressing block adapted to the fourth through hole, and a second toothed gear adapted to the first toothed gear.

[0012] The second end of the toothed disc is the adjustment end. One of the adjustment end and the fork tube mounting component is provided with a non-circular groove, and the other is provided with a non-circular protrusion that matches the non-circular groove. The non-circular groove and the non-circular protrusion are engaged.

[0013] When the pressing block is in the pressed state, the angle adjustment disc is in the unlocked state; when the pressing block is not in the pressed state, the angle adjustment disc is in the locked state.

[0014] In one embodiment, the first locking gear has at least one first locking tooth, and the second locking gear has a plurality of second locking teeth arranged at intervals, with a limiting groove formed between every two second locking teeth, the limiting groove being used to engage the first locking tooth.

[0015] Both the first and second locking teeth include a square segment and a beveled segment on the square segment. The square segment is correspondingly disposed on the limiting plate or locking tooth plate. The two sides of the square segment form limiting surfaces. The beveled segment extends outward from the square segment and gradually narrows on both sides away from the square segment to form a guide surface.

[0016] In one embodiment, the angle adjustment disc further includes an elastic element, a first groove is provided in the non-circular groove, a second groove is provided on the non-circular protrusion, one end of the elastic element is provided in the first groove, and the other end of the elastic element is provided in the second groove.

[0017] In one embodiment, the free ends of the first ring arm and the second ring arm are respectively provided with first connecting holes, and the tension adjustment assembly includes:

[0018] A wrench, one end of which has two spaced-apart second connecting holes;

[0019] A transmission assembly, one end of which is movably mounted on the sleeve seat, and the other end of which is provided with a first through hole. Two first connecting holes, two second connecting holes, and the first through hole are coaxially aligned and are all non-circular holes.

[0020] A first rotating shaft, the cross-section of which is adapted to the first connecting hole, the second connecting hole and the first through hole, and the first rotating shaft passing through the two first connecting holes, the two second connecting holes and the first through hole;

[0021] When the other end of the wrench swings relative to the socket, it drives the corresponding end of the transmission component to move closer to or further away from the socket via the first rotating shaft, so that the transmission component drives the first ring arm and the second ring arm to move linearly via the first rotating shaft, so that the first ring arm and the second ring arm switch between a clamped state and a loosened state.

[0022] In one embodiment, the transmission assembly includes:

[0023] Mounting base, the mounting base is disposed on the sleeve base, and the mounting base has two third connecting holes that are spaced apart and coaxially arranged;

[0024] A transmission component, the transmission component having a second through hole and a third through hole, the second through hole being coaxially arranged with two third connecting holes, the second through hole being rotatably connected to the third connecting holes through a second rotating shaft, the third through hole being a circular hole;

[0025] An eccentric component is rotatably disposed within the third through hole. One side of the eccentric component is attached to the transmission component, and the other side of the eccentric component forms the first through hole with the inner wall of the transmission component corresponding to the position of the third through hole.

[0026] In one embodiment, the fork tube mounting component includes a first mounting block and a second mounting block;

[0027] The first mounting block has a first through groove and has a first side and a second side corresponding to both sides of the first through groove; the second mounting block has a second through groove and has a third side and a fourth side corresponding to both sides of the second through groove, and the first side and the third side are integrally formed.

[0028] The second side has a first screw hole, and the fourth side has a second screw hole. The second side and the fourth side are spaced apart by a first distance. The first distance is adjusted by screws in the first screw hole and the second screw hole to adjust the diameter of the fork tube mounting hole.

[0029] This application also provides a handlebar stem, the handlebar stem comprising:

[0030] Riser;

[0031] As described above, one end of the riser is mounted on the sleeve seat of the riser mounting assembly of the angle adjuster.

[0032] In one embodiment, the riser has a first end and a second end opposite to each other, the first end of the riser is provided with a handlebar mount for detachably mounting a handlebar; the second end of the riser is mounted to the angle adjuster.

[0033] This application also provides a two-wheeled vehicle, which includes an angle adjuster as described above; or, includes a handlebar stem as described above.

[0034] As can be seen from the above, the handlebar seat tube angle adjuster, handlebar seat tube and two-wheeled vehicle provided in this application, through the cooperation of the seat tube mounting component, fork tube mounting component, tension adjustment component and angle adjustment disc, realize the angle adjustment and double locking between the seat tube and the fork tube, solve the problem of poor riding adaptability caused by the fixed angle of the handlebar seat tube in the prior art, and has the advantages of simple structure, convenient operation and reliable locking. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of the first embodiment of the angle adjuster provided in this application;

[0037] Figure 2 A schematic diagram of the structure of the second embodiment of the angle adjuster provided in this application;

[0038] Figure 3 A schematic diagram of the structure of the third embodiment of the angle adjuster provided in this application;

[0039] Figure 4 This is a schematic diagram of the structure of the fourth embodiment of the angle adjuster provided in this application;

[0040] Figure 5 This is a schematic diagram of the structure of the first embodiment of the toothed disc provided in this application;

[0041] Figure 6 A schematic diagram of the structure of the first embodiment of the fork tube mounting component provided in this application.

[0042] Explanation of icon numbers:

[0043] 100. Riser installation assembly; 110. Sleeve seat; 120. First ring arm; 130. Second ring arm;

[0044] 200. Fork tube mounting piece; 210. First mounting block; 211. First through groove; 212. First side; 213. Second side; 220. Second mounting block; 221. Second through groove; 222. Third side; 223. Fourth side;

[0045] 300. Tension adjustment assembly; 310. Wrench; 320. Transmission assembly; 321. Mounting base; 322. Transmission component; 323. Second rotating shaft; 324. Eccentric component; 330. First rotating shaft;

[0046] 400. Angle adjustment disc; 410. Limiting disc; 411. Fourth through hole; 412. First locking gear; 413. First locking tooth; 420. Locking tooth disc; 421. Pressing block; 422. Second locking gear; 423. Second locking tooth; 424. Limiting groove; 431. Non-circular groove; 432. Non-circular protrusion; 441. Square segment; 442. Beveled segment; 451. First groove; 452. Second groove;

[0047] 510, riser tube; 520, fork tube.

[0048] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0050] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0051] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0052] In traditional two-wheeled bicycles, the handlebar seat tube is rigidly connected to the fork tube, resulting in a lack of handlebar angle adjustment. This structural defect directly prevents the vehicle's handling system from adapting to changes in load weight distribution, road gradient, or rider size, leading to a single steering torque transmission path. The rigid motion coupling between the seat tube and fork tube also causes the steering system to lose its angle compensation capability, making it prone to torque imbalance under load shifts or complex road conditions, thus affecting the precise control of the vehicle's trajectory.

[0053] For example, in practical applications of cargo two-wheelers, when the vehicle's center of gravity shifts backward due to cargo loading, the fixed angle of the seat tube forces the rider to adopt a leaning posture for control. At this point, the steering axis of the front wheel forms a non-orthogonal angle with the direction of the rider's force, resulting in a decrease in steering torque transmission efficiency. On continuous slopes, the fixed-angle seat tube forces the rider to maintain an unnatural posture, causing the shoulder joint to continuously bear lateral shear force, accelerating muscle fatigue accumulation. This structural defect manifests in several ways: the steering system cannot compensate for the torque deviation caused by the center of gravity shift through angle adjustment, leading to steering lag when the vehicle is fully loaded; and the rider's fixed posture during long-distance transport causes compensatory lumbar flexion, increasing the risk of sports injuries. If these problems are not addressed, the dynamic adaptability of the vehicle's control system will remain limited, making it difficult to meet the needs of multi-condition applications. The loss of torque transmission efficiency caused by the fixed-angle structure directly reduces the handling stability of cargo vehicles, potentially leading to understeer or oversteer in emergency obstacle avoidance scenarios. Prolonged unnatural riding postures will cause cumulative sports injuries, affecting the health and safety of users.

[0054] In one embodiment of this application, as follows: Figure 1As shown, a handlebar seat tube angle adjuster is proposed, including: a seat tube 510 mounting assembly 100, a fork tube mounting component 200, a tension adjustment assembly 300, and an angle adjustment disc 400.

[0055] In this embodiment, the riser 510 mounting assembly 100 includes a sleeve seat 110, a first ring arm 120 and a second ring arm 130. The sleeve seat 110 is used to mount the riser 510. The fixed ends of the first ring arm 120 and the second ring arm 130 are respectively connected to the two sides of the sleeve seat 110. The fixed ends of the first ring arm 120 and the second ring arm 130 form a receiving space between their respective free ends.

[0056] The sleeve seat 110 refers to the mounting base used to fix the riser 510. It can be implemented by using a metal cylinder with internal threads or a snap-fit ​​structure. Its function is to provide a fixed support point for the first ring arm 120 and the second ring arm and to ensure that the riser 510 can be installed stably.

[0057] Optionally, the first ring arm 120 and the second ring arm 130 refer to symmetrically arranged arc-shaped clamping arms, which are made of one-piece molded steel arc-shaped components. Their fixed ends are connected to the sleeve seat 110 to form rigid support, and their free ends change the size of the accommodating space through opening and closing actions, which is used to control the rotational freedom of the fork tube mounting component 200.

[0058] In one feasible embodiment, the holding space formed by the first ring arm 120 and the second ring arm 130 is offset from the sleeve seat 110, so that the middle of the holding space formed by the first ring arm 120 and the second ring arm 130 is empty, so as to accommodate space for installing the fork tube mounting member 200.

[0059] In this embodiment, the fork tube mounting member 200 is cylindrical and disposed within the receiving space. Both ends of the fork tube mounting member 200 are rotatably disposed in the first ring arm 120 and the second ring arm 130, respectively. The fork tube mounting member 200 has radially arranged fork tube mounting holes for mounting the fork tube. 520

[0060] Understandably, a fork tube mounting hole refers to a through hole that radially penetrates the cylindrical mounting member, or it can be a slot formed on one side. This fork tube mounting hole is circular. It can be implemented using a channel with internal threads, a quick-release structure, or a retractable channel for securing the fork tube. Furthermore, the fork tube mounting member 200 is designed to rotate about its axis after the fork tube is installed to adjust the angle of the handlebars relative to the fork tube. Optionally, the fork tube mounting member 200 is cylindrical to facilitate rotation.

[0061] Optionally, the first ring arm 120 and the second ring arm 130 form a ring to correspondingly grip both ends of the cylindrical fork tube mount 200 for radial and axial restraint.

[0062] In this embodiment, the tension adjustment component 300 is connected to the free ends of the first ring arm 120 and the second ring arm 130, and is used to drive the first ring arm 120 and the second ring arm 130 to switch between a clamped state and a loose state; in the loose state, the fork tube mounting component 200 can rotate around the axis to adjust the angle.

[0063] The tension adjustment assembly 300 refers to the mechanical linkage device connecting the free end of the ring arm. Optionally, it can be implemented by a combination structure of an eccentric wheel and a wrench 310. The wrench 310 swings to drive the distance between the free ends of the first ring arm 120 and the second ring arm 130 to change, so that the first ring arm 120 and the second ring arm 130 constrain the axial rotation of the fork tube mounting member 200 when the first ring arm 120 and the second ring arm 130 are clamped, and release the rotation space when the first ring arm 120 and the second ring arm 130 are loosened, so as to allow the fork tube mounting member 200 to rotate axially.

[0064] In this embodiment, the angle adjustment disc 400 is disposed on the side of the sleeve seat 110 corresponding to the first ring arm 120 away from the fork tube mounting member 200. The adjustment end of the angle adjustment disc 400 abuts against the end face of the fork tube mounting member 200. The angle adjustment disc 400 can switch between an unlocked state and a locked state. In the unlocked state, the angle adjustment disc 400 rotates with the fork tube mounting member 200 through the adjustment end to adjust the angle. In the locked state, the adjustment end applies a rotational limiting force to the fork tube mounting member 200 through the adjustment end to lock the fork tube mounting member 200 at the corresponding angle.

[0065] The angle adjustment disc 400 refers to a disc-shaped component with a rotation limit structure. It can be implemented using a double disc system with a toothed meshing structure. Its adjustment end contacts the end face of the fork tube mounting piece 200 through a concave-convex interlocking structure. In the unlocked state, it records the angle position and in the locked state, it applies circumferential constraint force through the asymmetric interlocking surface.

[0066] It is understandable that this application achieves handlebar angle adjustment and dual locking functions within a limited space through the coordinated control of the opening and closing structure of the first ring arm 120 and the second ring arm 130 and the angle adjustment disc 400. The distance adjustment between the free ends of the first ring arm 120 and the second ring arm 130 can quickly switch between clamping and releasing states. Combined with the follow-up recording and circumferential constraint mechanism of the angle adjustment disc 400, it not only ensures the convenience of angle adjustment, but also ensures the stability of the locking state through mechanical interlocking, effectively solving the technical defects of the traditional riser 510 angle fixing.

[0067] In one feasible embodiment, during the adjustment process, the first ring arm 120 and the second ring arm 130 are first released by the tension adjustment assembly 300, allowing the fork tube mounting member 200 to rotate freely around its axis within the receiving space. However, the angle adjustment disc 400 remains locked, limiting the fork tube's rotation. To adjust, the angle adjustment disc 400 needs to be manually or automatically switched to the unlocked state, allowing its adjustment end to rotate with the fork tube mounting member 200. After adjusting the fork tube mounting member 200 to the desired angle, the angle adjustment disc 400 is switched to the locked state, applying a rotational limiting force to the fork tube mounting member 200 through its adjustment end. Finally, the tension adjustment assembly 300 clamps the ring arm, locking the fork tube mounting member 200 at the adjusted angle, thus achieving double locking. In this way, the adjustable angle of the seat tube 510 is achieved through the cooperation of the ring arm clamping structure and the rotation adjustment mechanism. The dual locking mechanism of the tension adjustment component 300 and the angle adjustment dial 400 ensures stability after adjustment.

[0068] Understandably, the adjustable angle adjuster allows the riser 510 to be adjusted to suit different road conditions, riding postures, or cargo loading requirements, improving the vehicle's adaptability. In cargo applications, it can better adapt to different load conditions and road condition changes. The dual locking mechanism ensures stability after adjustment, enhancing operational safety. Furthermore, this design maintains a compact structure without significantly increasing the vehicle's size or weight.

[0069] As can be seen from the above, the handlebar stem angle adjuster provided in this application, through the cooperation of the stem 510 mounting component 100, the fork tube mounting component 200, the tension adjustment component 300 and the angle adjustment disc 400, realizes the rapid adjustment and double locking of the stem 510 angle, solves the problem of poor riding adaptability caused by the fixed handlebar angle in the prior art, and has the advantages of simple structure, convenient operation and reliable locking.

[0070] In one embodiment, such as Figure 3 and Figure 4As shown, the angle adjustment disc 400 includes a limiting disc 410 and a locking disc 420. One end of the limiting disc 410 is located on the sleeve seat 110 and extends away from the opening. The limiting disc 410 has a fourth through hole 411, and a first locking gear 412 is provided on the side of the limiting disc 410 facing the fork tube mounting member 200. The first side of the locking disc 420 is provided corresponding to the limiting disc 410, and the second side is provided corresponding to the fork tube mounting member 200. The first side of the locking disc 420 is provided with a pressing block 421 adapted to the fourth through hole 411, and a second locking gear 422 adapted to the first locking gear 412. The second end of the locking disc 420 is an adjustment end. One of the adjustment end and the fork tube mounting member 200 is provided with a non-circular groove 431, and the other is provided with a non-circular protrusion 432 adapted to the non-circular groove 431. When the pressing block 421 is in the pressing state, the angle adjustment disk 400 is in the unlocked state; when the pressing block 421 is not in the pressing state, the angle adjustment disk 400 is in the locked state.

[0071] The number of teeth on either the first locking gear 412 or the second locking gear 422 can be set to 12 or 24 teeth, and the tooth pitch can be controlled within the range of 2-5 mm, without specific limitation. It should be noted that the first locking gear 412 can be located on the limiting plate 410 and on the periphery of the fourth through hole 411, that is, the fourth through hole 411 is located in the middle of the first locking gear 412. Meanwhile, the second locking gear 422 can be located on the locking plate 420 and on the periphery of the pressing block 421, that is, the pressing block 421 protrudes from the middle of the second locking gear 422.

[0072] The non-circular groove 431 and the non-circular protrusion 432 can be hexagonal, quadrilateral, triangular or elliptical, and their specific dimensions are not limited here.

[0073] The stroke distance of the pressing block 421 can be set to 1-3 mm, depending on the tooth height of the first locking gear 412 and the second locking gear 422, to ensure that the locking gears are completely disengaged.

[0074] Specifically, when angle adjustment is required, axial pressure is applied to the pressing block 421, causing the pawl 420 to displace along the fourth through hole 411 of the limiting disc 410. At this time, the second pawl gear 422 disengages from the first pawl gear 412, while the non-circular protrusion 432 remains engaged with the non-circular groove 431. The fork tube mounting component 200 can drive the pawl 420 to rotate synchronously, achieving stepless angle adjustment. When the pressure is released, the pawl 420 resets (either automatically or manually), and the first pawl gear 412 and the second pawl gear 422 re-engage, forming a multi-tooth contact.

[0075] For example, when the first locking gear 412 has 6 teeth and the second locking gear 422 has 24 teeth, a valid engagement position is created every 15 degrees of rotation. Optionally, the non-circular engagement structure can withstand a torque of 20-50 Nm in the locked state without relative slippage. This structure allows for unlocking with a single press during one-handed operation, and automatically locks upon release, thus shortening operation time.

[0076] It is understood that the first locking gear 412 can be provided with multiple evenly distributed locking teeth, for example, 12 locking teeth, with an angle of 30 degrees between adjacent locking teeth. The second locking gear 422 can be provided with multiple evenly distributed locking teeth, the number of which can be the same as or different from that of the first locking gear 412.

[0077] Through the above technical solution, this application achieves a stable connection between the angle adjustment disc 400 and the fork tube mounting component 200, avoiding jamming or accidental disengagement during adjustment. Simultaneously, the design of the pressing block 421 simplifies the switching between unlocked and locked states, allowing users to quickly complete the operation with one hand, significantly improving the user experience. Furthermore, the multi-tooth meshing design increases the contact area and friction, enhancing the reliability of angle fixation, while the engagement of the non-circular groove 431 and the protrusion further ensures the stability of torque transmission. This dual limiting mechanism greatly enhances the accuracy and robustness of angle adjustment, enabling the handlebar stem to maintain stable performance under various road conditions and load conditions.

[0078] It is particularly noteworthy that, because one of the adjusting end and the fork tube mounting component 200 has a non-circular groove 431, and the other has a non-circular protrusion 432 that mates with the non-circular groove 431, the non-circular groove 431 and the non-circular protrusion 432 are engaged. Therefore, the fork tube mounting component 200 itself participates in rotational limiting as part of the locking system, thus eliminating the need for additional limiting elements such as independent anti-rotation pins, keyways, or friction plates. This simplifies the internal structural design, providing a compact angle adjuster and reducing the number of parts and assembly complexity. This compact design not only helps improve the overall aesthetics of the vehicle but also leaves more space for peripheral components such as instruments, wiring harnesses, or dust covers, making it particularly suitable for the stringent requirements of lightweight and high integration in electric two-wheelers, shared mobility vehicles, and urban commuter vehicles.

[0079] It is also particularly important to note that the fork tube mounting hole is preferably a through-hole structure that penetrates the fork tube mounting component 200. This through-hole design allows the fork tube to be directly inserted and secured radially from the outside, making full use of the stacked layout between components and avoiding the protruding structure or additional installation channel caused by the fork tube being inserted from the front or top in the traditional riser 510 structure. More importantly, this design maximizes the use of limited internal space, eliminating the need to reserve additional operating angles or disassembly paths for installation, significantly improving the integration of the structure.

[0080] In one embodiment, such as Figures 3 to 5 As shown, the first locking gear 412 has at least one first locking tooth 413, and the second locking gear 422 has a plurality of second locking teeth 423 arranged at intervals. A limiting groove 424 is formed between every two second locking teeth 423. The limiting groove 424 is used to lock the first locking tooth 413. The first locking tooth 413 and the second locking tooth 423 both include a square segment 441 and an inclined segment 442 provided on the square segment 441. The square segment 441 is correspondingly provided on the limiting plate 410 or the locking tooth plate 420. The two sides of the square segment 441 form limiting surfaces. The inclined segment 442 extends outward from the square segment 441, and its two sides gradually narrow in the direction away from the square segment 441 to form a guide surface.

[0081] The limiting surface of the square segment 441 adopts a planar contact structure, forming a rigid support in the locked state. In one feasible embodiment, the contact area between the limiting surfaces reaches more than 60% of the total area of ​​the locking teeth, effectively improving shear resistance and preventing slippage or plastic deformation under high torque conditions. The guide surface of the inclined segment 442 adopts a symmetrical tapering structure, with its inclination angle controlled within the range of 30°-60°, allowing the locking teeth to slide smoothly into or out during axial relative movement, significantly reducing frictional resistance during engagement and disengagement. The depth of the limiting groove 424 is configured to be 1.2–1.5 times the height of the square segment 441, ensuring that the first locking tooth 413 retains a certain engagement margin when fully engaged, avoiding the risk of tooth disengagement due to manufacturing tolerances or wear, thereby ensuring long-term reliability.

[0082] In one specific embodiment, the width of the square segment 441 can be 3mm and the height can be 2mm; the length of the inclined segment 442 can be 1.5mm, and its two sides extend outward to form a 45° inclination angle, which achieves a good balance between frictional resistance and guiding efficiency. The width of the limiting slot 424 can be 3.1mm, slightly larger than the width of the square segment 441 of the first locking tooth 413, leaving a 0.1mm assembly gap to facilitate smooth insertion and removal, while avoiding shaking caused by excessive gap.

[0083] In this embodiment, the square segment 441 is used for limiting, and the inclined segment 442 is used for guiding.

[0084] Optionally, the inclined segment 442 can be configured as a trapezoidal block structure. The bottom surface of the trapezoidal inclined segment 442 connects with the square segment 441 to form an integrated structure. Its top surface width is smaller than its bottom surface, and it narrows radially inward, forming a symmetrical inclined guide profile. During the axial movement of the toothed disc 420, the inclined surface of the trapezoidal inclined segment 442 can form a smooth guiding contact with the groove edge between the adjacent second tooth 423. When axial pressing force is applied, the first tooth 413 slides along the entrance of the limiting groove 424 through the inclined surface of the trapezoidal segment, realizing automatic centering and disengagement, effectively avoiding sharp corner jamming or off-center loading. Furthermore, the narrowing design of the top surface increases the inter-tooth clearance and improves the assembly tolerance, ensuring the reliability and smoothness of the unlocking action even in environments with slight manufacturing deviations or dust contamination.

[0085] In one feasible embodiment, when the locking disc 420 is pressed, the guide surface of the beveled segment 442 guides the first locking tooth 413 to slide out of the limiting groove 424 along the tapered surface of the second locking tooth 423. At this time, the angle adjustment disc 400 is in the unlocked state, and the fork tube mounting member 200 can rotate freely. When the pressing is released, the elastic element pushes the locking disc 420 to reset, and the limiting surface of the square segment 441 of the first locking tooth 413 forms a planar contact with the limiting surface of the second locking tooth 423. In the locked state, multiple limiting grooves 424 form multi-point contact with the first locking tooth 413. The tapered design of the beveled segment 442 reduces the torque required for the unlocking operation, while the planar contact structure of the square segment 441 increases the torsional strength in the locked state. Thus, precise locking of the angle adjustment is ensured, and an optimized balance of operating force is achieved.

[0086] It's understandable that a full circle is 360 degrees. If one locking gear has 12 teeth, each tooth corresponds to a 30-degree adjustment interval, suitable for general-purpose two-wheeled vehicles where high adjustment precision is not required. If one locking gear has 24 teeth, each tooth corresponds to a 15-degree angle adjustment precision, suitable for scenarios requiring precise control, such as mountain bikes, heavy-duty trucks, or rehabilitation assistive vehicles. Therefore, the required number of locking teeth can be determined based on the actual application. More locking teeth facilitate finer adjustments; for example, a 48-tooth structure can achieve an adjustment step of 7.5° or even smaller, approaching a stepless adjustment experience. Increasing the number of locking teeth also improves the contact point density during locking, further dispersing stress and extending service life. However, manufacturing costs and space constraints must be weighed.

[0087] Understandably, given the actual usage scenarios of two-wheeled vehicles, to prevent accidental adjustment of the handlebar angle due to vibration, impact, or accidental contact during riding, the angle adjuster needs to have sufficient anti-torsional locking torque. In one feasible embodiment, the overall locking structure of the angle adjuster should have a certain anti-misadjustment torque (e.g., between 50-200 N·m) to provide sufficient safety margin and ensure that no unexpected loosening or rotation occurs throughout its entire lifespan. For this angle adjuster, this locking torque is achieved through a dual locking structure, specifically distributed as follows: Angle adjustment disc 400: mainly responsible for the transmission and positioning of torsional torque. Through the multi-tooth meshing of the first locking gear 412 and the second locking gear 422, the square limiting surface forms a planar contact. In this embodiment, taking a 24-tooth structure as an example, under uniform force on all teeth, the maximum anti-torsional capacity can reach 100-300 N·m; sufficient to resist the maximum torsional impact during normal riding. The tension adjustment component 300 primarily provides preload to prevent axial movement or radial wobble in the fork tube mounting member 200, indirectly enhancing the stability of the circumferential locking mechanism. Driven by an eccentric wheel or quick-release wrench 310, the ring arm applies a uniform clamping force to the cylindrical fork tube mounting member 200. In this embodiment, the frictional torque generated by the clamping force contributes 50–200 N·m of torsional resistance and effectively suppresses fretting wear between the locking teeth. Optionally, the combined torque of the angle adjustment disc 400 and the tension adjustment component 300 should be sufficient to prevent misadjustment. Of course, the specific torque generated by the angle adjuster 400 can vary depending on the actual application scenario; the above represents a possible range for use in a cargo two-wheeler.

[0088] Through the above technical solution, this application achieves stability and smooth operation during gear engagement. The spaced arrangement of the first locking tooth 413 and the second locking tooth 423 forms a limiting groove 424, which achieves multi-point limiting through the cooperation of the groove and the locking tooth, enhancing the contact area and stability during locking. The two sides of the square segment 441 form limiting surfaces, which provide rigid support through planar contact in the locked state, avoiding locking failure caused by sliding on the inclined surface. The gradually narrowing guide surface of the inclined segment 442 guides the locking teeth to disengage or engage during unlocking or adjustment, reducing frictional resistance and making the angle adjustment disc 400 operate more smoothly when switching states.

[0089] In one embodiment, such as Figure 3 and Figure 4 As shown, the angle adjustment disc 400 also includes an elastic element (not shown in the figure), a first groove 451 is provided in the non-circular groove 431, a second groove 452 is provided on the non-circular protrusion 432, one end of the elastic element is provided in the first groove 451, and the other end of the elastic element is provided in the second groove 452.

[0090] The elastic element can be a helical spring or an elastic rubber column, with an elastic coefficient ranging from 5 to 15 N / mm, preferably 10 N / mm, to ensure reliable reset while avoiding excessive operating force. This elastic element is arranged along the axial direction of the mating joint between the non-circular protrusion 432 and the groove, and its compression and extension directions are consistent with the axial sliding direction of the toothed disc 420.

[0091] When the pressing block 421 is pressed to unlock the toothed disc 420, the externally applied axial pressure overcomes the elastic force of the elastic element, pushing the toothed disc 420 inward along the fourth through hole 411. This causes the first locking gear 412 to disengage from the second locking gear 422, entering the unlocked state. At this time, the elastic element is compressed and stores elastic potential energy. During this process, the first groove 451 and the second groove 452 form spatial limits on both ends of the elastic element, preventing it from shifting or twisting. When the pressing block 421 is released, the disc enters the locked state. The elastic element releases the stored elastic potential energy, pushing the toothed disc 420 to reset axially outward, causing the first locking gear 412 to re-embed in the limiting groove 424 of the second locking gear 422, achieving automatic engagement and locking. This improves the ease of operation, allowing users to complete the adjustment simply by "pressing → rotating → releasing," without the need for additional locking actions. It also ensures the timeliness and reliability of locking, avoiding the safety hazard of not locking due to human negligence.

[0092] Through the above technical solution, this application achieves automatic reset and dynamic engagement control of the angle adjustment disc 400. The elastic element not only serves as the reset power source after unlocking, ensuring reliable re-engagement of the locking teeth, but also ensures its stability and durability during operation through the groove limiting structure, thereby improving the practicality and user experience of the angle adjuster.

[0093] In one embodiment, such as Figure 2 As shown, the free ends of the first ring arm 120 and the second ring arm 130 are respectively provided with first connecting holes, and the tension adjustment assembly 300 includes a wrench 310, a transmission assembly 320, and a first rotating shaft 330. One end of the wrench 310 has two spaced-apart second connecting holes; one end of the transmission component 320 is movably mounted on the socket 110, and the other end of the transmission component 320 has a first through hole. The two first connecting holes, the two second connecting holes, and the first through hole are coaxially aligned and are all non-circular holes; the cross section of the first rotating shaft 330 is adapted to the first connecting holes, the second connecting holes, and the first through hole, and the first rotating shaft 330 passes through the two first connecting holes, the two second connecting holes, and the first through hole; when the other end of the wrench 310 swings relative to the socket 110, the first rotating shaft 330 drives the corresponding end of the transmission component 320 (the end connected to the first rotating shaft 330) to move closer to or away from the socket 110, so that the transmission component 320 drives the first ring arm 120 and the second ring arm 130 to switch between a clamped state and a loosened state through the first rotating shaft 330.

[0094] The free ends of the first ring arm 120 and the second ring arm 130 are respectively provided with first connecting holes, the wrench 310 is provided with two spaced-apart second connecting holes, and the end of the transmission assembly 320 is provided with a first through hole. The connecting holes in the three parts are coaxially aligned and are all designed as non-circular holes (such as hexagonal, D-shaped, or polygonal), and their cross-sectional shape is perfectly adapted to the outer contour of the first rotating shaft 330. The first rotating shaft 330 is a prism structure of a corresponding shape (such as a hexagonal prism) that passes through all the connecting holes, completely suppressing circumferential relative rotation while transmitting driving force.

[0095] During the swing of the wrench 310, the first rotating shaft 330 transmits only linear driving force within the non-circular hole, avoiding energy loss due to rotational friction. The linear motion of the transmission assembly 320 directly acts on the free ends of the first ring arm 120 and the second ring arm 130, shortening the force transmission path and improving transmission efficiency. The shape constraint of the non-circular hole and the first rotating shaft 330 ensures that each connecting component remains coaxially aligned when under force, preventing loosening of the connection due to circumferential offset. For example, when the wrench 310 swings downward by 10-15 degrees, the transmission assembly 320 can drive the free ends of the first ring arm 120 and the second ring arm 130 to move outward by 3 mm, causing the fork tube mounting piece 200 to be in a loosened state; after the wrench 310 returns to its original position, the transmission assembly 320 moves in the opposite direction, and the free ends of the first ring arm 120 and the second ring arm 130 clamp inward, with the clamping force evenly distributed to the two ring arms through the first rotating shaft 330. For example, when the wrench 310 swings upward about 30-60 degrees, the first ring arm 120 and the second ring arm 130 can be loosened; when the wrench 310 swings downward about 30-60 degrees, the first ring arm 120 and the second ring arm 130 can be clamped.

[0096] In one feasible embodiment, the wrench 310 may be lever-shaped, with a length of 100-200mm. The second connecting hole may be hexagonal, with a diameter of 6-10mm. The transmission assembly 320 may be a U-shaped structure, with one end hinged to the sleeve seat 110 via a pin. The first through hole may be hexagonal, with a diameter of 6-10mm. The first rotating shaft 330 may be a hexagonal prism, with a diameter of 6-10mm and a length of 30-50mm.

[0097] Through the above technical solution, this application achieves efficient transmission for tension adjustment. The wrench 310 and transmission assembly 320 are connected via a non-circular hole and a matching first rotating shaft 330, ensuring no relative slippage between components during movement and improving transmission accuracy. When the wrench 310 swings, the first rotating shaft 330 converts the rotational motion of the wrench 310 into linear displacement of the transmission assembly 320, thereby causing the free end of the ring arm to clamp or loosen, simplifying the operation. The shape constraint of the non-circular hole and the rotating shaft cross-section effectively prevents circumferential displacement between the rotating shaft and the connecting hole due to force, enhancing structural stability. The movable connection design of the transmission assembly 320 allows for smooth transmission of driving force when the wrench 310 swings, avoiding motion interference caused by rigid connections, thus improving adjustment reliability.

[0098] In one embodiment, such as Figure 2 As shown, the transmission assembly 320 includes a mounting base 321, a transmission component 322, and an eccentric component 324. The mounting base 321 is disposed on the sleeve base 110 and has two third connecting holes spaced apart and coaxially arranged. The transmission component 322 has a second through hole and a third through hole. The second through hole is coaxially arranged with the two third connecting holes. The second through hole is rotatably connected to the third connecting holes through a second rotating shaft 323. The third through hole is a circular hole. The eccentric component 324 is rotatably disposed in the third through hole. One side of the eccentric component 324 is attached to the transmission component 322, and the other side of the eccentric component 324 forms a first through hole with the inner wall of the transmission component 322 corresponding to the position of the third through hole.

[0099] In one embodiment, when the wrench 310 swings, the transmission component 322 rotates around the second shaft 323, causing the eccentric component 324 to rotate within the third through hole. During the rotation of the eccentric component 324, the change in the gap between it and the inner wall of the transmission component 322 causes the axis of the first through hole to shift, thereby driving the first shaft 330 to generate displacement. The displacement of the first shaft 330 causes the free ends of the first ring arm 120 and the second ring arm 130 to move closer or further apart, realizing the clamping or loosening action. Through the eccentric transmission structure, the swinging action of the wrench 310 is converted into linear displacement, and the rotational adjustment of the eccentric component 324 makes the force transmission path more direct, reducing frictional loss. The two third connecting holes of the mounting base 321 provide dual-point support for the transmission component 322, avoiding the deflection problem caused by single-point support and ensuring the stability of the axis of the transmission component 322 during swinging. The circular design of the third through hole allows the eccentric component 324 to rotate freely, avoiding jamming caused by the asymmetrical structure. Thus, the transmission efficiency is improved.

[0100] Specifically, the mounting base 321 may be made of a metal material, such as aluminum alloy or stainless steel, to provide sufficient strength and durability. The transmission component 322 may be made of high-strength engineering plastic or metal material, and the second rotating shaft 323 may be made of bearing steel with a heat-treated and precision-machined surface to improve wear resistance and rotational accuracy.

[0101] Through the above technical solutions, this application improves the connection stability and transmission efficiency between the transmission assembly 320 and the sleeve seat 110. The mounting base 321 provides a stable support point for the transmission component 322, reducing swaying and offset during transmission. The transmission component 322 forms a reliable rotational connection with the mounting base 321 through the second rotating shaft 323, ensuring smooth transmission. The design of the eccentric component 324 enables more precise displacement control, making tightness adjustment more accurate. At the same time, this structure simplifies the transmission path, reduces intermediate links, and lowers mechanical losses. Furthermore, the principle of eccentric transmission makes the force transmission more uniform, improving the consistency of locking force.

[0102] In one embodiment, such as Figure 6 As shown, the fork tube mounting component 200 includes a first mounting block 210 and a second mounting block 220. The first mounting block 210 has a first through groove 211 and a first side 212 and a second side 213 corresponding to both sides of the first through groove 211. The second mounting block 220 has a second through groove 221 and a third side 222 and a fourth side 223 corresponding to both sides of the second through groove 221. The first side 212 and the third side 222 are integrally formed. The second side 213 has a first screw hole, and the fourth side 223 has a second screw hole. The second side 213 and the fourth side 223 are spaced apart by a first distance, and the first distance is adjusted by screws in the first screw hole and the second screw hole to adjust the diameter of the fork tube mounting hole.

[0103] In this embodiment, the first mounting block 210 and the second mounting block 220 form a split clamping structure through a through groove. The integral connection between the first side 212 and the third side 222 ensures overall rigidity and prevents structural instability during adjustment. The second side 213 and the fourth side 223 are respectively provided with screw holes. The distance between them is controlled by the screw insertion depth, thereby changing the diameter of the mounting hole formed by the first through groove 211 and the second through groove 221.

[0104] Optionally, the first mounting block 210 is disposed on the first ring arm 120, and the second mounting block 220 is disposed on the second ring arm 130.

[0105] For example, the screws can use standard M5 or M6 threads, and the adjustment range can cover 2-5 mm to accommodate fork tubes of different outer diameters. The 520 split design allows for elastic deformation of local structures while maintaining the overall strength of the mounting components, thereby expanding the orifice adjustment range.

[0106] Specifically, when the screws are screwed into the first and second screw holes, the distance between the second side 213 and the fourth side 223 is compressed or expanded, causing the opening widths of the first and second through slots 211 and 221 to change accordingly. For example, tightening the screws reduces the distance, closing the through slots to clamp the smaller outer diameter fork tube; loosening the screws increases the distance, opening the through slots to accommodate the larger outer diameter fork tube. 520 achieves dynamic adjustment of the clamping force through a mechanical locking method, ensuring installation stability while avoiding compatibility limitations caused by fixed hole diameters. Furthermore, the integrally formed first side 212 and third side 222 maintain the overall structural strength of the mounting block during adjustment.

[0107] Optionally, the first mounting block 210 and the second mounting block 220 may be made of metal materials, such as aluminum alloy or stainless steel.

[0108] Optionally, the first through groove 211 and the second through groove 221 can be designed as semi-cylindrical, forming a cylindrical fork tube mounting hole when the first mounting block 210 and the second mounting block 220 are closed.

[0109] Through the above technical solution, this application achieves adjustability of the fork tube mounting hole, improving installation compatibility. The split design and adjustable structure allow the fork tube mounting component 200 to adapt to different specifications of fork tubes, solving the problem that fixed-diameter mounting holes cannot adapt to differences in the outer diameter of fork tubes in different vehicle models or usage scenarios. Simultaneously, the bolt adjustment mechanism allows for precise control of the clamping force, avoiding potential loosening or inability to tighten during installation. Furthermore, the integrated first side 212 and third side 222 ensure the overall rigidity and structural strength of the mounting component, guaranteeing stability during adjustment.

[0110] This application also proposes a handlebar stem, which includes a stem 510 and an angle adjuster. The specific structure of the angle adjuster is as described in the above embodiments. Since this handlebar stem adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0111] In one feasible embodiment, the inner wall of the sleeve seat 110 is designed to form an interference fit or clearance fit with the outer diameter of the riser 510, for example, the inner diameter tolerance is controlled within ±0.1 mm, to accommodate risers 510 of different specifications. The axial extension length of the sleeve seat 110 is set to 1.2-1.5 times the diameter of the riser 510, for example, when the diameter of the riser 510 is 30 mm, the length of the sleeve seat 110 is 36-45 mm, thereby increasing the contact area.

[0112] In one embodiment, the riser 510 has a first end and a second end opposite to each other. The first end of the riser 510 is provided with a handlebar mount for detachably mounting a handlebar. The second end of the riser 510 is mounted on an angle adjuster.

[0113] Understandably, when the handlebars need to be replaced, the original handlebars can be pulled out axially by releasing the locking mechanism of the handlebar mount, and then the new handlebars adapted for the new usage scenario can be inserted into the mounting interface and locked. During this process, the second end of the seat tube 510 remains fixedly connected to the angle adjuster, eliminating the need to readjust the seat tube 510 angle reference. The interface size of the handlebar mount can be standardized, for example, using a universal tube diameter of 25 mm or 30 mm, allowing compatibility with different brands and types of handlebars. The separate design of the detachable structure at the first end and the angle adjustment function at the second end makes handlebar shape adjustment and seat tube 510 angle adjustment two independent operating dimensions.

[0114] It is important to note that in actual use, when the handlebars need to be replaced for repair, upgrades, or personalization, there is often a need to readjust the riding posture. For example, changes in the width, height, or sweep angle of the newly installed handlebars may lead to uncomfortable handling or uneven torque transmission. In this case, simply replacing the handlebars is not enough to restore optimal handling; the mounting angle of the handlebars relative to the fork must also be adjusted simultaneously. This is where the angle adjuster described in this application comes in. Users can quickly and accurately reset the relative angle between the seat tube 510 and the fork tube without disassembling the fork or the entire bicycle structure by operating the tension adjustment component 300 and the angle adjustment disc 400, to match the ergonomic parameters of the new handlebars. Therefore, this handlebar seat tube greatly improves the maintainability and personalization capabilities of the vehicle.

[0115] This application also proposes a two-wheeled vehicle, which includes a handlebar stem or an angle adjuster. The specific structure of the handlebar stem and the angle adjuster is as described in the above embodiments. Since this two-wheeled vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0116] The two-wheeled vehicle can be a bicycle, an electric bicycle, an electric moped, an electric motorcycle, or a human-powered bicycle. In particular, the two-wheeled vehicle in this embodiment refers to a cargo two-wheeled vehicle. In actual use, the weight distribution of the cargo often causes the riding posture to become unbalanced. By integrating the aforementioned angle adjuster, the handlebar angle can be dynamically adjusted under different loading conditions, improving handling stability and riding comfort, and effectively solving the technical problems of difficult steering and instability caused by center of gravity shift under heavy loads.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A handlebar stem angle adjuster, characterized in that, include: A riser installation assembly includes a sleeve base, a first ring arm, and a second ring arm. The sleeve base is used to install the riser. The fixed ends of the first ring arm and the second ring arm are respectively connected to the two sides of the sleeve base. The fixed ends of the first ring arm and the second ring arm form a receiving space between their respective free ends. A fork tube mounting member, in the shape of a column, is disposed within the receiving space. The two ends of the fork tube mounting member are rotatably disposed in the first ring arm and the second ring arm, respectively. The fork tube mounting member has a fork tube mounting hole arranged radially, which is used to install the fork tube. A tension adjustment assembly is connected to the free ends of the first ring arm and the second ring arm, and is used to drive the first ring arm and the second ring arm to switch between a clamped state and a loosened state. In the released state, the fork tube mounting can rotate around its axis to adjust the angle; An angle adjustment disc is provided on the side of the sleeve seat corresponding to the first ring arm away from the fork tube mounting member. The adjustment end of the angle adjustment disc abuts against the end face of the fork tube mounting member. The angle adjustment disc can switch between an unlocked state and a locked state. In the unlocked state, the angle adjustment disc rotates with the fork tube mounting member via the adjustment end to adjust the angle; in the locked state, the adjustment end applies a rotational limiting force to the fork tube mounting member to lock the fork tube mounting member at the corresponding angle.

2. The handlebar stem angle adjuster as described in claim 1, characterized in that, The angle adjustment dial includes: A limiting plate, one end of which is disposed on the sleeve seat and extends in the direction away from the opening, the limiting plate having a fourth through hole, and a first locking gear being disposed on the side of the limiting plate facing the front fork tube mounting member; The toothed disc has a first side and a second side opposite to each other. The first side of the toothed disc is provided corresponding to the limiting disc, and the second side of the toothed disc is provided corresponding to the front fork tube mounting component. The first side of the toothed disc is provided with a pressing block adapted to the fourth through hole, and a second toothed gear adapted to the first toothed gear. The second end of the toothed disc is the adjustment end. One of the adjustment end and the fork tube mounting component is provided with a non-circular groove, and the other is provided with a non-circular protrusion that matches the non-circular groove. The non-circular groove and the non-circular protrusion are engaged. When the pressing block is in the pressed state, the angle adjustment disc is in the unlocked state; when the pressing block is not in the pressed state, the angle adjustment disc is in the locked state.

3. The handlebar stem angle adjuster as described in claim 2, characterized in that, The first locking gear has at least one first locking tooth, and the second locking gear has a plurality of second locking teeth arranged at intervals. A limiting groove is formed between every two second locking teeth, and the limiting groove is used to lock the first locking tooth. Both the first and second locking teeth include a square segment and a beveled segment on the square segment. The square segment is correspondingly disposed on the limiting plate or locking tooth plate. The two sides of the square segment form limiting surfaces. The beveled segment extends outward from the square segment and gradually narrows on both sides away from the square segment to form a guide surface.

4. The handlebar stem angle adjuster as described in claim 2, characterized in that, The angle adjustment disc also includes an elastic element. The non-circular groove has a first groove, and the non-circular protrusion has a second groove. One end of the elastic element is located in the first groove, and the other end of the elastic element is located in the second groove.

5. The handlebar stem angle adjuster as described in claim 1, characterized in that, The first ring arm and the second ring arm are respectively provided with a first connecting hole at their free ends, and the tension adjustment assembly includes: A wrench, one end of which has two spaced-apart second connecting holes; A transmission assembly, one end of which is movably mounted on the sleeve seat, and the other end of which is provided with a first through hole. Two first connecting holes, two second connecting holes, and the first through hole are coaxially aligned and are all non-circular holes. A first rotating shaft, the cross-section of which is adapted to the first connecting hole, the second connecting hole and the first through hole, and the first rotating shaft passing through the two first connecting holes, the two second connecting holes and the first through hole; When the other end of the wrench swings relative to the socket, it drives the corresponding end of the transmission component to move closer to or further away from the socket via the first rotating shaft, so that the transmission component drives the first ring arm and the second ring arm to move linearly via the first rotating shaft, so that the first ring arm and the second ring arm switch between a clamped state and a loosened state.

6. The handlebar stem angle adjuster as described in claim 5, characterized in that, The transmission assembly includes: Mounting base, the mounting base is disposed on the sleeve base, and the mounting base has two third connecting holes that are spaced apart and coaxially arranged; A transmission component, the transmission component having a second through hole and a third through hole, the second through hole being coaxially arranged with two third connecting holes, the second through hole being rotatably connected to the third connecting holes through a second rotating shaft, the third through hole being a circular hole; An eccentric component is rotatably disposed within the third through hole. One side of the eccentric component is attached to the transmission component, and the other side of the eccentric component forms the first through hole with the inner wall of the transmission component corresponding to the position of the third through hole.

7. The handlebar stem angle adjuster as described in any one of claims 1 to 6, characterized in that, The fork tube mounting component includes a first mounting block and a second mounting block; The first mounting block has a first through groove and has a first side and a second side corresponding to both sides of the first through groove; the second mounting block has a second through groove and has a third side and a fourth side corresponding to both sides of the second through groove, and the first side and the third side are integrally formed. The second side has a first screw hole, and the fourth side has a second screw hole. The second side and the fourth side are spaced apart by a first distance. The first distance is adjusted by screws in the first screw hole and the second screw hole to adjust the diameter of the fork tube mounting hole.

8. A handlebar stem, characterized in that, The handlebar stem includes: Riser; The angle adjuster as described in any one of claims 1 to 7, wherein one end of the riser is mounted on the sleeve seat of the riser mounting assembly of the angle adjuster.

9. The handlebar stem as described in claim 8, characterized in that, The riser has a first end and a second end, the first end of the riser is provided with a handlebar mounting piece for detachable installation of handlebars; the second end of the riser is mounted on the angle adjuster.

10. A two-wheeled vehicle, characterized in that, The two-wheeled vehicle includes a handlebar stem angle adjuster as described in any one of claims 1 to 7; or, it includes a handlebar stem as described in claim 8 or 9.

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