Headstock fixing structure

Abstract

The utility model relates to a handlebar stem fixing structure, and belongs to the technical field of bicycle structures. The stem fixing structure comprises a front fork and a fastener, the front fork comprises an inner tube, the inner tube comprises a first tube section and a second tube section, and the first tube section is inserted into a mounting hole of a stem; the fastener sleeves the first pipe section, the pipe diameter of the first pipe section is smaller than that of the second pipe section, a first step surface is formed between the first pipe section and the second pipe section, and the fastener is pressed on the first step surface by the stem; wherein a connecting part is arranged in the inner pipe, the connecting part is connected to the inner wall of the inner pipe through a connecting wall, an end cover is arranged at the end, away from the inner pipe, of a mounting hole of the stem, the end cover is provided with a first through hole for a first screw to penetrate through, the first screw is in threaded connection with a first blind hole in the connecting part, and the first screw pulls the end cover to be tightly attached to the stem. The handlebar stem fixing structure is low in installation difficulty, and a front fork is not prone to being damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycle structure, in particular to a handlebar fixing structure. BACKGROUND

[0002] A bicycle is a common means of transportation. The main structure of a common bicycle can be divided into the following parts: frame, steering system, brake system, transmission system and wheel set. In a simulated cycling system designed according to a bicycle, the main part to be restored is the frame of the bicycle. The frame is the basic structure of the bicycle and is the skeleton and main body of the bicycle. All other components are directly or indirectly fixed to the frame.

[0003] The head tube stem of a bicycle is an important part of the connection between the handlebar and the front fork. Its function is to support and stabilize the bicycle. The design of the stem is usually to adapt to the interface of different handlebars and front forks to ensure the stability and safety of the bicycle.

[0004] The conventional stem needs to be placed in the front fork tube first during installation, and then the stem is tightened to lock the handlebar and the front fork, so that the handlebar connected to the handlebar can stably drive the front fork to rotate. On the one hand, the stem may move with the handlebar head and the inner wall of the front fork tube, causing damage to the inner wall of the front fork tube, and then causing the stem and the inner wall of the front fork tube to loosen. On the other hand, if the length direction of the stem is offset during installation, it may cause excessive extrusion of the stem to the local area of the inner wall of the front fork tube, causing deformation and damage of the front fork tube, and even breaking. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to solve the above problems, provide a handlebar fixing structure, which has low installation difficulty and is not easy to damage the front fork, so as to improve the above problems.

[0006] The present application is achieved by the following technical scheme:

[0007] The handlebar fixing structure provided by the present application comprises a front fork and a fastener. The front fork comprises an inner tube, the inner tube comprises a first tube segment and a second tube segment, and the first tube segment is inserted into the mounting hole of the handlebar. The fastener is sleeved on the first tube segment, the tube diameter of the first tube segment is smaller than that of the second tube segment, a first step surface is formed between the first tube segment and the second tube segment, and the fastener is pressed on the first step surface by the handlebar. The inner tube is internally provided with a connecting part, the connecting part is connected to the inner wall of the inner tube through a connecting wall, an end cover is arranged on the end of the mounting hole of the handlebar away from the inner tube, the end cover is provided with a first through hole for the first screw to pass through, the first screw is connected with the threads in the first blind hole on the connecting part, and the first screw pulls the end cover to tightly contact with the handlebar.

[0008] In the technical scheme of the embodiment of the application, the front fork comprises an inner tube, the inner tube comprises a first tube segment and a second tube segment, the tube wall of the first tube segment and the second tube segment can be the same, the first tube segment is inserted into the mounting hole of the handlebar, and the handlebar is clamped on the first tube segment; the fastener is sleeved on the first tube segment, the tube diameter (the outer diameter here) of the first tube segment is smaller than the tube diameter of the second tube segment, a first step surface is formed between the first tube segment and the second tube segment, the fastener is pressed on the first step surface, on the one hand, the fastener can fill the gap between the handlebar and the first step surface, so that the connection between the handlebar and the first step surface is stable, and on the other hand, the fastener can be tightly attached to the first tube segment, so that the contact area between the handlebar and the inner tube is increased, and the mutual limiting effect of the handlebar and the inner tube is improved; wherein, the inner tube is internally provided with a connecting portion, the connecting portion is connected to the inner wall of the inner tube through a connecting wall, the connecting portion is centered, so that the vibration or impact force received by the handlebar can be evenly dispersed to all parts of the inner tube from the center of the inner tube after being transmitted to the inner tube, thereby reducing the risk that the local area of the mounting hole of the handlebar is excessively pressed by the inner wall of the inner tube, causing deformation or damage of the mounting hole of the handlebar, the size of the inner wall of the first tube segment and the second tube segment can be the same, the internal structure of the inner tube is simplified, and the difficulty of forming the inner tube is reduced, the end cover of the mounting hole of the handlebar away from the inner tube is provided with an end cover, the end cover is provided with a first through hole for the first screw to pass through, the first screw is connected with the thread in the first blind hole on the connecting portion, the first screw pulls the end cover to tightly attach to the handlebar, the first screw applies a force downward along the length direction of the inner tube to the handlebar through the end cover, the first step surface applies a force upward along the length direction of the inner tube to the handlebar, and the two forces cooperate to clamp the handlebar, so as to fix the handlebar on the inner tube, the handlebar fixing structure provided in the application fixes the inner tube of the front fork and the handlebar through the fastener and the first screw, thereby eliminating the commonly used hanging core in the connection between the existing bicycle fork and the handlebar, avoiding the damage or loose connection of the tube wall caused by the mutual friction between the hanging core and the tube wall, after the inner tube is inserted into the mounting hole of the handlebar, the outer surface of the inner tube can be attached to the inner wall of the mounting hole to realize mutual positioning, the first screw can be directly inserted into the first blind hole of the connecting portion after positioning to realize positioning, the operation is simple and fast, the disassembly and assembly efficiency and difficulty of the handlebar are reduced, the risk of damage of the front fork or loose connection between the handlebar caused by installation error of the handlebar is reduced, and the service life of the front fork is prolonged.

[0009] In some embodiments, in the length direction of the inner tube, the gap between the thread in the first blind hole and the surface of the connecting portion facing the end cover is not more than the first screw.

[0010] The technical scheme of the embodiment of the application has the following beneficial effects: the gap between the thread in the first blind hole and the surface of the end cover towards the connecting portion allows the first screw to move a distance along the length direction of the first blind hole before being in contact with the thread in the first blind hole for thread connection, the inner wall of the part of the first blind hole without the thread can guide and correct the direction of the first screw extending into the first blind hole, so that the first screw is less likely to deviate in direction and position when it starts to engage with the thread in the first blind hole, the difficulty of installing the first screw and the probability of error during installation are reduced, the service life of the first screw and the inner tube is prolonged, the thread in the first blind hole does not exceed the first screw, the total length of the thread in the first blind hole in the length direction of the inner tube is small, and when the first screw is connected with the thread in the first blind hole, the contact area between the first screw and the first blind hole is small, so that the resistance received by the first screw when the teeth of the first screw engage with the teeth in the first blind hole is reduced, the risk of the first screw being twisted and damaged under the resistance is reduced, the operator needs to exert less force on the rotation of the first screw, and the difficulty of disassembling the first screw is reduced.

[0011] According to some embodiments of the application, the end cover further comprises a mounting groove opposite the first through hole, the first through hole is located inside the mounting groove, and the nut of the first screw is located inside the mounting groove.

[0012] In the technical scheme of the embodiment of the application, the first through hole is located inside the mounting groove, the nut of the first screw is located inside the mounting groove, a second step surface is formed between the mounting groove and the first through hole, the second step surface is located between the surface of the handle away from the inner tube and the end surface of the inner tube, the nut of the first screw is in abutment with the second step surface, the force exerted by the first screw on the end cover is a pulling force, so that when the force exerted by the end cover on the handle is too large, the end cover can be folded in the direction away from the handle under the combined action of the pulling force of the first screw and the reaction force exerted by the handle on the end cover, the deformation direction of the end cover is controlled, the pressure exerted by the deformed end cover on the handle is reduced, and the risk of damage to the handle is reduced (since the cost of replacing the end cover is lower than the cost of replacing the handle, this method can reduce the risk of damage to the handle with a lower-cost end cover).

[0013] According to some embodiments of the application, the nut of the first screw does not exceed the mounting groove, and the end cover further comprises a protective cover for closing the opening of the mounting groove, and the surface of the protective cover towards the first screw is provided with a positioning pin adapted to be inserted into the groove on the nut of the first screw.

[0014] In the technical scheme of the embodiment of the application, the protective cover is used to close the opening of the mounting groove, the nut of the first screw does not exceed the mounting groove, the mounting groove of the protective cover and the end cover can completely surround the nut of the first screw, on the one hand, the contact of water and other liquids in the external environment with the nut of the first screw is avoided to prevent the rust of the first screw and the difficulty in disassembling the first screw, on the other hand, the first screw is prevented from being directly subjected to the impact force from the external environment to cause the position deviation of the first screw and the large mutual extrusion force between the first screw and the inner tube to cause the deformation and damage of the first screw, and the surface of the protective cover facing the first screw is provided with a positioning pin, the positioning pin is adapted to be inserted into the groove on the nut of the first screw, the protective cover can be positioned on the nut of the first screw through the positioning pin, the relative position between the protective cover and the first screw is fixed, and it is ensured that the protective cover can shield and protect the first screw.

[0015] In some embodiments, the first step surface protrudes a plurality of positioning portions, the plurality of positioning portions are arranged around the first pipe segment and fixedly connected with the first pipe segment, the fastener covers the plurality of positioning portions, and the fastener cooperates with the plurality of positioning portions.

[0016] In the technical scheme of the embodiment of the application, the fastener covers the plurality of positioning portions, and the fastener cooperates with the plurality of positioning portions, when the fastener is pressed towards the first step surface, the groove for cooperating with the positioning portion is arranged on the fastener, the fastener can be tightly and clamped with the positioning portion, the contact area between the fastener and the inner tube is increased, the positioning portion can also limit the rotation of the fastener, thereby improving the connection stability between the stand and the inner tube, the plurality of positioning portions are arranged around the first pipe segment and fixedly connected with the first pipe segment, the positioning portion can have a large connection strength with the inner tube, so that the connection between the positioning portion and the inner tube is not easily damaged when the positioning portion is subjected to the stress from the fastener.

[0017] In some embodiments, the number of the connection walls is a plurality, and the plurality of connection walls are arranged around the connection portion.

[0018] In the technical scheme of the embodiment of the application, the number of the connection walls is a plurality, the plurality of connection walls can disperse the force applied by the first screw on the connection portion and the force applied by the inner wall of the mounting hole of the stand on the inner tube, the force borne by each connection wall is small, the risk of deformation and damage of the connection wall due to the excessive force is reduced, and the plurality of connection walls are arranged around the connection portion, the force borne by each connection wall in the plurality of connection walls is uniform, and the risk of damage of a certain connection wall due to the excessive stress is reduced.

[0019] In some embodiments, the front fork further comprises an outer tube, the second tube segment is inserted into the outer tube, a through slot is provided on the outer periphery of the outer tube, the through slot extends to the end face of the outer tube facing the stem, a tensioning assembly is arranged at the through slot, the tensioning assembly is used to tighten or loosen the outer tube on both sides of the through slot to control the opening size of the through slot, and the tensioning assembly is switched between the tightening state and the loosening state to clamp or loosen the second tube segment.

[0020] In the technical scheme of the embodiments of the present application, the through slot is provided on the outer periphery of the outer tube, the tensioning assembly is arranged at the through slot, the tensioning assembly is used to tighten or loosen the outer tube on both sides of the through slot to control the opening size of the through slot, when the tensioning assembly is in the tightening state, the outer tube clamps the inner tube to limit the movement of the inner tube, when the tensioning assembly is in the loosening state, the outer tube loosens the inner tube to allow the inner tube to move along the length direction of the outer tube, the size of the part of the second tube segment inside the outer tube can be controlled by moving the inner tube, thereby controlling the height of the stem connected to the first tube segment, and the height requirement of the bicycle handlebar of users of different heights is met.

[0021] In some embodiments, a transition sleeve is further arranged between the second tube segment and the outer tube, the transition sleeve is clamped by the outer tube and the second tube segment, and the transition sleeve is provided with an opening corresponding to the through slot.

[0022] In the technical scheme of the embodiments of the present application, the transition sleeve is clamped by the outer tube and the second tube segment, the transition sleeve can separate the outer tube and the second tube segment, the transition sleeve has a certain buffering effect, the impact of the vibration from the wheel on the outer tube is not directly transmitted to the inner tube and then to the handlebar, so that the user's body is not impacted, the use experience of the bicycle using the stem fixing structure provided by the present application is improved, the transition sleeve is provided with an opening corresponding to the through slot, so that the transition sleeve can be deformed more easily along with the deformation of the through slot of the outer tube, and the fitting effect between the transition sleeve and the outer tube and the inner tube is improved.

[0023] In some embodiments, the end face of the transition sleeve facing the stem exceeds the end face of the outer tube facing the stem, a convex ring is arranged on the outer periphery of the transition sleeve exceeding the outer tube, and the convex ring is tightly attached to the end face of the outer tube facing the stem.

[0024] In the technical scheme of the embodiments of the present application, the convex ring is arranged on the outer periphery of the transition sleeve exceeding the outer tube, and the convex ring is tightly attached to the end face of the outer tube facing the stem, so that the contact area between the transition sleeve and the outer tube is increased, the outer tube is limited by the convex ring to the transition sleeve, and the transition sleeve is not easily moved along the outer tube under the driving of the inner tube.

[0025] In some embodiments, in the length direction of the inner tube, the size of the second tube segment inside the outer tube is smaller than the size of the outer tube, the transition sleeve exceeds the through slot, and the transition sleeve does not exceed the second tube segment.

[0026] The size of the second pipe segment inside the outer pipe is smaller than the size of the outer pipe, the size of the part of the inner pipe used for connecting the outer pipe is shorter, so that the length of the whole inner pipe is shorter, the weight of the inner pipe is reduced, the bicycle using the fixing structure of the handlebar provided by the application is more portable, the transition sleeve exceeds the elastic groove, the transition sleeve does not exceed the second pipe segment, the contact area between the transition sleeve and the inner pipe is smaller, the friction force between the inner pipe and the transition sleeve generated when the inner pipe moves inside the outer pipe is smaller, so that the movement of the inner pipe relative to the outer pipe is easier.

[0027] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0029] Figure 1 The structure schematic diagram of the frame of the bicycle using the fixing structure of the handlebar is provided for some embodiments of the application.

[0030] Figure 2 The structure schematic diagram of the front fork and the handlebar is provided for some embodiments of the application.

[0031] Figure 3 The side view of the front fork and the handlebar is provided for some embodiments of the application.

[0032] Figure 4 The structure schematic diagram of the inner pipe is provided for some embodiments of the application. Figure 3 The sectional view at A-A in FIG.

[0033] Figure 5 The structure schematic diagram of the inner pipe is provided for some embodiments of the application.

[0034] FIG. The structure schematic diagram of the inner pipe is provided for some embodiments of the application. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0037] In the present application, the phrase "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0040] "Multiple" appearing in the present application means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0041] The handle fixing structure provided by the application can be applied to a bicycle riding simulation system and various scooter bodies.

[0042] According to some embodiments of the application, the handle fixing structure provided by the application includes a front fork 2 and a fastener 3, the front fork 2 includes an inner tube 20, the inner tube 20 includes a first tube segment 200 and a second tube segment 201, the first tube segment 200 is inserted into the mounting hole 10 of the handle 1, the fastener 3 is sleeved on the first tube segment 200, the diameter of the first tube segment 200 is smaller than the diameter of the second tube segment 201, a first step surface 202 is formed between the first tube segment 200 and the second tube segment 201, and the fastener 3 is pressed on the first step surface 202 by the handle 1. Figures 1-5

[0043] The conventional front fork 2 includes a front fork 2 tube and a head tube portion, and the inner tube 20 mentioned in the application is a component of the head tube.

[0044] The material of the front fork 2 is the same as the material of the whole bicycle frame, which is mostly carbon fiber, aluminum alloy, steel or titanium, so that the bicycle frame has high structural strength and light weight.

[0045] The handle 1 is an important component connecting the bicycle handlebar and the front fork 2, and the size of the mounting hole 10 of the handle 1 can be controlled by a screw, so that the handle 1 can clamp or release the inner tube 20, which facilitates the extension of the inner tube 20 into the mounting hole 10 of the handle 1 or the disassembly and assembly, and reduces the assembly difficulty between the handle 1 and the inner tube 20.

[0046] The fastener 3 can be made of a material with elasticity and structural stability, such as rubber, plastic, resin, carbon black / carbon nanotube / silicone rubber composite material, etc., so that after the fastener 3 is extruded by the handle 1 and the first step surface 202, it can adhere to the outer wall of the first tube segment 200, the handle 1 and the first step surface 202 are deformed, the connection between the three is more compact, and irregular deformation is not easy to occur under the action of vibration and other impacts, so that the fastening effect of the fastener 3 between the handle 1 and the inner tube 20 is stable and reliable.

[0047] ​The front fork 2 comprises an inner tube 20, the inner tube 20 comprises a first tube segment 200 and a second tube segment 201, the tube wall of the first tube segment 200 and the second tube segment 201 can be the same, the first tube segment 200 is inserted into the mounting hole 10 of the stem 1, and the stem 1 is clamped on the first tube segment 200; the fastener 3 is sleeved on the first tube segment 200, the tube diameter of the first tube segment 200 is smaller than the tube diameter of the second tube segment 201 (the tube diameter here is the outer diameter), a first step surface 202 is formed between the first tube segment 200 and the second tube segment 201, the stem 1 is pressed on the first step surface 202 by the fastener 3, on the one hand, the fastener 3 can fill the gap between the stem 1 and the first step surface 202, so that the connection between the stem 1 and the first step surface 202 is stable, on the other hand, the fastener 3 can be tightly attached to the first tube segment 200, thereby increasing the contact area between the stem 1 and the inner tube 20 and improving the mutual limiting effect of the stem 1 and the inner tube 20; wherein the inner tube 20 is internally provided with a connecting portion 203, the connecting portion 203 is connected to the inner wall of the inner tube 20 through a connecting wall 204, the connecting portion 203 is centered, so that the vibration or impact force received by the bicycle handlebar can be evenly dispersed to all parts of the inner tube 20 after being transmitted to the inner tube 20, thereby reducing the risk of excessive extrusion of the inner wall of the mounting hole 10 of the stem 1 by the inner tube 20, which may cause deformation or damage of the mounting hole 10 of the stem 1; the size of the inner wall of the first tube segment 200 and the second tube segment 201 can be the same, which simplifies the internal structure of the inner tube 20 and reduces the difficulty of forming the inner tube 20; the end cover 4 away from the inner tube 20 of the mounting hole 10 of the stem 1 is provided with an end cover 4, the end cover 4 is provided with a first through hole 40 for the first screw 5 to pass through, the first screw 5 is connected with the thread in the first blind hole on the connecting portion 203, the first screw 5 pulls the end cover 4 to tightly attach to the stem 1, the first screw 5 applies a force along the length direction of the inner tube 20 downward to the stem 1 through the end cover 4, the first step surface 202 applies a force along the length direction of the inner tube 20 upward to the stem 1, and the two forces cooperate to clamp the stem 1, thereby fixing the stem 1 on the inner tube 20. The stem fixing structure provided by the present application fixes the inner tube 20 of the front fork 2 and the stem 1 by the fastener 3 and the first screw 5, which eliminates the commonly used hanging core in the connection between the existing bicycle fork and the stem 1, avoids the damage or loosening of the tube wall caused by the mutual friction between the hanging core and the tube wall, and the outer surface of the inner tube 20 can be attached to the inner wall of the mounting hole 10 to realize mutual positioning after the inner tube 20 is inserted into the mounting hole 10 of the stem 1, the first screw 5 can be directly inserted into the first blind hole of the connecting portion 203 after positioning to realize positioning, which is simple and fast, reduces the disassembly and assembly efficiency and difficulty of the stem 1, reduces the risk of damage of the front fork 2 or loosening of the connection between the stem 1 due to installation errors of the stem 1, and prolongs the service life of the front fork 2.

[0048] According to some embodiments of the present application, optionally, Figure 4As shown, the thread in the first blind hole and the surface of the connecting portion 203 facing the end cap 4 have a gap in the length direction of the inner tube 20, and the thread does not exceed the first screw 5.

[0049] The thread can damage the surface of the object, making the object prone to cracking and damage along the thread when subjected to force. The first screw 5 can only be threaded in the area where the thread in the first blind hole is matched, so that the first screw 5 can have higher strength in the area where the thread in the first blind hole is not matched, thereby reducing the risk of cracking and damage of the first screw 5 when subjected to vibration or impact force from the front fork 2 and the handlebar, and prolonging the service life of the first screw 5.

[0050] The thread in the first blind hole and the surface of the connecting portion 203 facing the end cap 4 have a gap in the length direction of the inner tube 20, and the thread does not exceed the first screw 5.

[0051] According to some embodiments of the present application, optionally, Figure 4 As shown, the end cap 4 is further provided with a mounting groove 41 opposite the first through hole 40, and the first through hole 40 is located inside the mounting groove 41, and the nut of the first screw 5 is located inside the mounting groove 41.

[0052] The size of the end cap 4 is greater than the hole diameter of the mounting hole 10 of the stem 1, and a portion of the end cap 4 is located inside the mounting hole 10 and protrudes towards the inner tube 20. The portion of the end cap 4 located inside the mounting hole 10 can be attached to the inner wall of the mounting hole 10 to position the end cap 4.

[0053] The first through hole 40 is located inside the mounting groove 41, the nut of the first screw 5 is located inside the mounting groove 41, a second step surface is formed between the mounting groove 41 and the first through hole 40, the second step surface is located between the surface of the handle 1 away from the inner tube 20 and the end surface of the inner tube 20, the nut of the first screw 5 is in abutment with the second step surface, the force exerted by the first screw 5 on the end cover 4 is a pulling force, so that when the force exerted by the end cover 4 on the handle 1 is too large, the end cover 4 can be folded in the direction away from the handle 1 under the combined action of the pulling force of the first screw 5 and the reaction force of the handle 1 on the end cover 4, the deformation direction of the end cover 4 is controlled, so that the pressure exerted by the deformed end cover 4 on the handle 1 is reduced, thereby reducing the risk of damage to the handle 1 (since the cost of replacing the end cover 4 is lower than the cost of replacing the handle 1, this method can reduce the risk of damage to the handle 1 with the cost of the end cover 4 being relatively low).

[0054] According to some embodiments of the present application, optionally, as shown in Figure 4 The nut of the first screw 5 does not exceed the mounting groove 41, and the protective cover 6 is used to close the opening of the mounting groove 41, and the surface of the protective cover 6 facing the first screw 5 is provided with a positioning pin 60. The positioning pin 60 is adapted to be inserted into the groove on the nut of the first screw 5.

[0055] The nut of the first screw 5 can be in contact with the protective cover 6, and the protective cover 6 can be in abutment with the end cover 4, so that the end cover 4 can support the protective cover 6. When the protective cover 6 is impacted by external impact, the impact force is mainly transmitted to the end cover 4, and part of the impact force can be shared by the nut of the first screw 5, so that the amount of force transmitted to the first screw 5 by the protective cover 6 is relatively small, thereby reducing the influence of the external environment on the first screw 5.

[0056] The protective cover 6 is used to close the opening of the mounting groove 41, and the nut of the first screw 5 does not exceed the mounting groove 41, so that the mounting groove 41 of the protective cover 6 and the end cover 4 can completely surround the nut of the first screw 5. On the one hand, it avoids the contact between the liquid such as water from the external environment and the nut of the first screw 5, which causes rust of the nut of the first screw 5, thereby causing the first screw 5 to be difficult to disassemble. On the other hand, it avoids the direct impact of the external environment on the first screw 5, which causes the first screw 5 to be offset, thereby causing the first screw 5 to be deformed and damaged due to the relatively large mutual extrusion force between the first screw 5 and the inner tube 20. In addition, the surface of the protective cover 6 facing the first screw 5 is provided with a positioning pin 60. The positioning pin 60 is adapted to be inserted into the groove on the nut of the first screw 5. The protective cover 6 can be positioned on the nut of the first screw 5 through the positioning pin 60, so that the relative position between the protective cover 6 and the first screw 5 is fixed, thereby ensuring that the protective cover 6 can shield and protect the first screw 5.

[0057] According to some embodiments of the present application, optionally, as shown in Figures 4-5As shown, the first step surface 202 is convex with a plurality of positioning portions 2020, the plurality of positioning portions 2020 are arranged around the first pipe segment 200 and fixedly connected with the first pipe segment 200, the fastener 3 covers the plurality of positioning portions 2020, and the fastener 3 cooperates with the plurality of positioning portions 2020.

[0058] The positioning portion 2020 can be a wedge-shaped or cubic structure, so that the positioning portion 2020 can be clamped with the fastener 3, thereby improving the limitation effect of rotation and deformation of the fastener 3; or the surface of the positioning portion 2020 can be an arc surface, so as to reduce the sharp structure between the positioning portion 2020 and the fastener 3, thereby reducing the risk that stress is concentrated on the sharp part in the process of mutual extrusion of the positioning portion 2020 and the fastener 3, causing damage to the sharp part or the structure in contact with the sharp part.

[0059] The number of the plurality of positioning portions 2020 can be, but is not limited to, three, four, five, six, seven, eight or more.

[0060] The fastener 3 covers the plurality of positioning portions 2020, and the fastener 3 cooperates with the plurality of positioning portions 2020, when the fastener 3 is pressed by the handle 1 towards the first step surface 202, the fastener 3 is provided with a groove for cooperating with the positioning portion 2020, so that the fastener 3 can be tightly attached to and clamped with the positioning portion 2020, thereby increasing the contact area between the fastener 3 and the inner pipe 20, and the positioning portion 2020 can also limit the rotation of the fastener 3, thereby improving the connection stability between the handle 1 and the inner pipe 20, the plurality of positioning portions 2020 are arranged around the first pipe segment 200 and fixedly connected with the first pipe segment 200, so that the positioning portion 2020 can have a larger connection strength with the inner pipe 20, thereby preventing the connection between the positioning portion 2020 and the inner pipe 20 from being damaged when the positioning portion 2020 is subjected to stress from the fastener 3.

[0061] According to some embodiments of the present application, optionally, Figure 5 As shown, the number of the connection walls 204 is a plurality, and the plurality of connection walls 204 are arranged around the connection portion 203.

[0062] The number of the plurality of connection walls 204 can be, but is not limited to, three, four, five, six, seven, eight, nine or more.

[0063] The number of the connection walls 204 is a plurality, the plurality of connection walls 204 can disperse the force applied by the first screw 5 to the connection portion 203 and the force applied by the inner wall of the mounting hole 10 of the handle 1 to the inner pipe 20, so that each connection wall 204 bears a smaller force, thereby reducing the risk of deformation and damage of the connection wall 204 due to excessive force, and the plurality of connection walls 204 are arranged around the connection portion 203, so that the force borne by each connection wall 204 in the plurality of connection walls 204 is uniform, thereby reducing the risk of damage of a certain connection wall 204 due to excessive stress.

[0064] According to some embodiments of the present application, as shown in Figures 1-4 The front fork 2 further comprises an outer tube 21, the second tube segment 201 is inserted into the outer tube 21, the outer tube 21 is provided with a plurality of tension grooves 210 on the outer circumferential surface, the tension grooves 210 extend to the end surface of the outer tube 21 facing the stem 1, and the tension grooves 210 are provided with a tension assembly 211, the tension assembly 211 is used to tighten or loosen the outer tube 21 on both sides of the tension grooves 210 to control the opening size of the tension grooves 210, and the tension assembly 211 is switched between the tightened state and the loosened state to clamp or loosen the second tube segment 201.

[0065] The tension assembly 211 can be composed of a traction screw and two traction parts, the two traction parts are respectively located on both sides of the tension grooves 210, the two traction parts are respectively provided with a threaded hole, the traction screw is threadedly connected with the threaded holes of the two traction parts, and the traction screw is driven to rotate to drive the two traction parts to move towards each other or move away from each other, thereby driving the two sides of the tension grooves 210 to move towards each other or move away from each other.

[0066] The outer tube 21 is provided with a plurality of tension grooves 210 on the outer circumferential surface, the tension grooves 210 are provided with a tension assembly 211, the tension assembly 211 is used to tighten or loosen the outer tube 21 on both sides of the tension grooves 210 to control the opening size of the tension grooves 210, when the tension assembly 211 is in the tightened state, the outer tube 21 clamps the inner tube 20 to limit the movement of the inner tube 20, when the tension assembly 211 is in the loosened state, the outer tube 21 loosens the inner tube 20, and the inner tube 20 can move along the length direction of the outer tube 21, the size of the part of the second tube segment 201 inside the outer tube 21 can be controlled by moving the inner tube 20, thereby controlling the height of the stem 1 connected with the first tube segment 200, and adapting to the height requirement of the bicycle handlebar of users of different heights.

[0067] According to some embodiments of the present application, as shown in Figure 1 , Figures 3-4 The second tube segment 201 and the outer tube 21 are further provided with a transition sleeve 22, the transition sleeve 22 is clamped by the outer tube 21 and the second tube segment 201, and the transition sleeve 22 is provided with an opening corresponding to the tension grooves 210.

[0068] The transition sleeve 22 can be a non-metal material with a certain elasticity, such as rubber, plastic, latex, etc.; or the transition sleeve 22 can be a metal material with elasticity, such as copper-based alloy, nitinol (NiTi) alloy, beryllium, spring steel, etc.

[0069] The transition sleeve 22 is clamped by the outer tube 21 and the second tube segment 201, the transition sleeve 22 can separate the outer tube 21 and the second tube segment 201, the transition sleeve 22 has a certain buffering effect, avoiding the outer tube 21 being directly transmitted to the inner tube 20 after being impacted by the vibration of the wheel, and then being transmitted to the handlebar, so as to avoid the situation that the user's body is impacted, improve the use experience of the bicycle applied with the handlebar fixing structure provided in the application, and the transition sleeve 22 is provided with an opening corresponding to the elastic groove 210, so that the transition sleeve 22 can be deformed more easily along with the deformation of the elastic groove 210 of the outer tube 21, and the fitting effect between the transition sleeve 22 and the outer tube 21 and the inner tube 20 is improved.

[0070] According to some embodiments of the application, optionally, as shown in Figure 4 The transition sleeve 22 exceeds the end surface of the handlebar 1 towards the end surface of the handlebar 1 of the outer tube 21, and the transition sleeve 22 exceeding the outer circumferential surface of the outer tube 21 is provided with a convex ring, which is tightly attached to the end surface of the handlebar 1 of the outer tube 21.

[0071] The outer circumferential surface of the outer tube 21 does not exceed the outer circumferential surface of the convex ring, so that the convex ring can effectively shield the end surface of the handlebar 1 of the outer tube 21.

[0072] The transition sleeve 22 exceeding the outer circumferential surface of the outer tube 21 is provided with a convex ring, which is tightly attached to the end surface of the handlebar 1 of the outer tube 21, thereby increasing the contact area between the transition sleeve 22 and the outer tube 21 and limiting the transition sleeve 22 by the convex ring of the outer tube 21, so that the transition sleeve 22 is not easy to move along the outer tube 21 under the driving of the inner tube 20.

[0073] According to some embodiments of the application, optionally, as shown in Figure 4 In the length direction of the inner tube 20, the size of the second tube segment 201 located inside the outer tube 21 is smaller than the size of the outer tube 21, the transition sleeve 22 exceeds the elastic groove 210, and the transition sleeve 22 does not exceed the second tube segment 201.

[0074] The size of the second tube segment 201 located inside the outer tube 21 is smaller than the size of the outer tube 21, so that the size of the part of the inner tube 20 used for connecting the outer tube 21 is shorter, thereby making the overall length of the inner tube 20 shorter, reducing the weight of the inner tube 20, making the bicycle applied with the handlebar fixing structure provided in the application more portable, the transition sleeve 22 exceeds the elastic groove 210, and the transition sleeve 22 does not exceed the second tube segment 201, so that the contact area between the transition sleeve 22 and the inner tube 20 is smaller, the friction force generated between the inner tube 20 and the transition sleeve 22 when the inner tube 20 moves inside the outer tube 21 is smaller, thereby making the movement of the inner tube 20 relative to the outer tube 21 easier.

[0075] Although the present application has been described with reference to preferred embodiments, various modifications can be made to the application without departing from the scope of the application. In particular, the technical features mentioned in the various embodiments can be combined in any way, provided that there is no structural conflict. The present 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 clamping and fixing structure, characterized in that, The front fork comprises: a front fork including an inner tube, the inner tube comprising a first tube segment and a second tube segment, the first tube segment being inserted into a mounting hole of a stem; a fastener sleeved on the first tube segment, the first tube segment having a smaller diameter than the second tube segment, a first step surface being formed between the first tube segment and the second tube segment, the fastener being pressed against the first step surface by the stem; wherein the inner tube is internally provided with a connecting portion connected to an inner wall of the inner tube by a connecting wall, an end cover being provided at an end of the inner tube away from the inner tube, the end cover being provided with a first through hole for a first screw to pass through, the first screw being threadedly connected to a first blind hole on the connecting portion, the first screw pulling the end cover to tightly abut against the stem.

2. The stand fixing structure according to claim 1, wherein In the length direction of the inner tube, a gap is formed between the thread in the first blind hole and the surface of the connecting portion facing the end cover, and the gap does not exceed the first screw.

3. The stand fixing structure according to claim 1, wherein The end cover is further provided with a mounting groove opposite the first through hole, the first through hole being located inside the mounting groove, and a nut of the first screw being located inside the mounting groove.

4. The stand fixing structure according to claim 3, wherein The nut of the first screw does not exceed the mounting groove, and a protective cover is further provided for closing an opening of the mounting groove, and a positioning pin is provided on a surface of the protective cover facing the first screw, the positioning pin being adapted to be inserted into a groove on the nut of the first screw.

5. The stand fixing structure according to claim 1, wherein The first step surface is provided with a plurality of positioning portions protruding therefrom, the positioning portions being arranged around and fixed to the first tube segment, the fastener covering the positioning portions, and the fastener cooperating with the positioning portions.

6. The stand fixing structure according to claim 1, wherein The number of the connecting walls is plural, and the connecting walls are arranged around the connecting portion.

7. The stand fixing structure according to claim 1, wherein The front fork further comprises an outer tube, the second tube segment being inserted into the outer tube, an outer circumferential surface of the outer tube being provided with a tensioning groove extending to an end surface of the outer tube facing the stem, a tensioning assembly being provided at the tensioning groove, the tensioning assembly being used to tighten or loosen the outer tube on both sides of the tensioning groove to control the opening size of the tensioning groove, the tensioning assembly being switched between a tightening state and a loosening state to clamp or loosen the second tube segment.

8. The stand fixing structure according to claim 7, wherein A transition sleeve is further provided between the second tube segment and the outer tube, the transition sleeve being clamped by the outer tube and the second tube segment, the transition sleeve being provided with an opening corresponding to the tensioning groove.

9. The stand fixing structure according to claim 8, wherein The end surface of the transition sleeve facing the stem exceeds the end surface of the outer tube facing the stem, the transition sleeve being provided with a protruding ring exceeding the outer circumferential surface of the outer tube, the protruding ring being tightly abutted against the end surface of the outer tube facing the stem.

10. The stand fixing structure according to claim 8, wherein In the length direction of the inner tube, the size of the second tube segment inside the outer tube is smaller than the size of the outer tube, the transition sleeve exceeds the tensioning groove, and the transition sleeve does not exceed the second tube segment.

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