Frame structure and two-wheeled vehicle

Abstract

The present invention belongs to the technical field of two-wheeled vehicles and discloses a frame structure and a two-wheeled vehicle. The frame structure is provided with a shock-absorbing seat, which is rotatably connected to the beam through a folding shaft, so that the frame has a turning folding effect; secondly, the shock-absorbing seat is rotatably connected to the rear fork, and the axis of rotation is parallel to the ground, a first shock-absorbing groove is provided on the shock-absorbing seat, and a second shock-absorbing groove is provided on the rear fork, so that the first shock-absorbing groove and the second shock-absorbing groove cooperate to form a shock-absorbing cavity, and a shock-absorbing elastic member is provided in the shock-absorbing cavity, and the deformation direction of the shock-absorbing elastic member is perpendicular to the ground, so that the frame has a shock-absorbing effect; thirdly, the shock-absorbing elastic member is provided in the shock-absorbing cavity, which avoids the influence and damage of the shock-absorbing elastic member by external environmental factors, thereby reducing the risk of shock-absorbing failure; thirdly, when the shock-absorbing elastic member fails elastically, the shock-absorbing seat has the function of buffering the swing stress of the beam and reducing the force on the beam.

Description

Technical Field

[0001] The present invention relates to the technical field of two-wheeled vehicles, and in particular to a frame structure and a two-wheeled vehicle. Background Art

[0002] Two-wheeled vehicles, including bicycles, electric bicycles, and children's scooters, have become essential tools in people's daily lives as people increasingly prioritize environmental protection and fitness. However, encountering uneven roads, speed bumps, and other road conditions can cause riders to experience significant jolts, reducing riding comfort and safety.

[0003] To address the aforementioned issues, the prior art discloses a frame structure comprising a main frame, a rear fork, a support, and an elastic member. The rear fork is rotatably connected to the support. The support has a mounting slot, within which the elastic member is disposed. One end of the elastic member abuts the bottom of the slot, while the other end abuts the main frame. When encountering uneven road surfaces or speed bumps, the rear fork swings up and down, causing the elastic member to deform, thereby reducing the swing amplitude and achieving a shock-absorbing effect.

[0004] However, in the above-mentioned technical solution, the portion of the elastic member near the beam is exposed to the outside. External environmental factors (such as rain, dust, and bumps) can damage the elastic member to a certain extent, shortening its service life and posing the risk of shock absorption failure. Furthermore, the existing frame structure does not have a foldable function. Therefore, there is an urgent need to propose a frame structure that can solve the above-mentioned technical problems. Summary of the Invention

[0005] One object of the present invention is to provide a frame structure that has shock absorption and folding effects, while also having the effect of reducing the risk of shock absorption failure and the effect of reducing the force on the beam when the shock absorption elastic member fails elastically.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A vehicle frame structure, comprising:

[0008] beam;

[0009] A folding shaft, one end of which is fixed on the beam;

[0010] A shock-absorbing seat, wherein the other end of the folding shaft is passed through the shock-absorbing seat, and the shock-absorbing seat is rotatably connected to the beam through the folding shaft, and the shock-absorbing seat is provided with a first shock-absorbing groove;

[0011] The rear fork is rotatably connected to the shock absorber seat, and the axis of rotation is parallel to the ground. The rear fork is provided with a second shock absorber groove, and the first shock absorber groove and the second shock absorber groove cooperate to form a shock absorber cavity;

[0012] The shock-absorbing elastic member is placed in the shock-absorbing cavity, with one end thereof fitting against the inner wall of the shock-absorbing cavity and the other end being connected to the rear fork, and the deformation direction of the shock-absorbing elastic member is perpendicular to the ground.

[0013] Optionally, a locking nut is also included. The other end of the folding shaft passes through the shock-absorbing seat and is provided with an external thread. The other end of the folding shaft is threadedly connected to the locking nut to lock the relative position of the shock-absorbing seat and the beam.

[0014] Optionally, it also includes a locking elastic member and a locking pin. The locking elastic member is installed on the beam, and the locking pin is fixed on the locking elastic member. The shock absorber seat is provided with a locking hole. The axial direction of the locking hole is parallel to the deformation direction of the locking elastic member. When the locking elastic member is in a natural state, the locking pin extends into the locking hole to lock the relative position of the shock absorber seat and the beam. When the locking elastic member is in a compressed state, the locking pin extends out of the locking hole to unlock the relative position of the shock absorber seat and the beam.

[0015] Optionally, an unlocking button is also included, the locking hole is a through hole, the unlocking button is movably arranged in the locking hole, and one end of the unlocking button can be fitted with the locking pin. When the unlocking button is pressed at the other end, the locking elastic part is compressed, and when the unlocking button is released, the locking elastic part rebounds.

[0016] Optionally, the locking hole is provided with a closing opening, and when the locking elastic member is in a natural state, the other end of the unlocking button fits against the inner wall of the closing opening.

[0017] Optionally, the axis of the folding shaft is perpendicular to the ground.

[0018] Optionally, a shock-absorbing shaft is further included, the rear fork and the shock-absorbing seat are rotatably connected via the shock-absorbing shaft, and the folding shaft is passed through the shock-absorbing shaft.

[0019] Optionally, a connecting seat is further included, which is arranged in the shock-absorbing cavity, and the other end of the shock-absorbing elastic member is fitted with the connecting seat, and the connecting seat is detachably connected to the rear fork.

[0020] Optionally, the beam is provided with a receiving hole, and the locking elastic member is placed in the receiving hole.

[0021] Another object of the present invention is to provide a two-wheeled vehicle that not only has the effects of shock absorption and folding, but also has a low possibility of shock absorption failure, and if the shock absorption fails, the vibration stress on the beam is small.

[0022] To achieve this object, the present invention adopts the following technical solutions:

[0023] A two-wheeled vehicle comprises a saddle, a front fork, a handlebar, a front wheel assembly, a rear wheel assembly and the above-mentioned frame structure, wherein the saddle is arranged on a beam of the frame structure, the front fork is rotatably connected to the beam, the handlebar is rotatably connected to the front fork, the front wheel assembly is rotatably connected to the front fork, and the rear wheel assembly is rotatably connected to the rear fork of the frame structure.

[0024] Beneficial effects:

[0025] The frame structure provided by the present invention is provided with a shock-absorbing seat and a folding shaft. The shock-absorbing seat is rotatably connected to the beam through the folding shaft, and the rear fork is rotatably connected to the shock-absorbing seat. The axis of rotation of the rear fork relative to the shock-absorbing seat is parallel to the ground. A first shock-absorbing groove is provided on the shock-absorbing seat, and a second shock-absorbing groove is provided on the rear fork, so that the first shock-absorbing groove and the second shock-absorbing groove cooperate to form a shock-absorbing cavity. A shock-absorbing elastic member is provided in the shock-absorbing cavity, with one end fitting against the inner wall of the shock-absorbing cavity and the other end connected to the rear fork. The deformation direction of the shock-absorbing elastic member is perpendicular to the ground. When the rear fork swings up and down, the rear fork rotates relative to the shock-absorbing seat, and the deformation of the shock-absorbing elastic member is utilized to absorb the swing amplitude of the rear fork to achieve a shock-absorbing effect.

[0026] On the other hand, arranging the shock-absorbing elastic part in the shock-absorbing cavity avoids the influence and damage of external environmental factors (such as rain, dust, bumps, etc.) on the shock-absorbing elastic part, extends the service life of the shock-absorbing elastic part, and also reduces the risk of shock-absorbing failure caused by elastic failure of the shock-absorbing elastic part.

[0027] On the other hand, in the prior art, the rear fork is connected to the main frame via an elastic member. If the elastic member fails, when the rear fork swings up and down, the swing stress will be directly transmitted from the rear fork to the main frame. The frame structure provided by this application connects the rear fork to the main frame via a shock absorber mount. The first shock absorber groove on the shock absorber mount and the second shock absorber groove on the rear fork cooperate to form a shock absorber cavity. The shock absorber elastic member is disposed in the shock absorber cavity. If the shock absorber elastic member fails, the swing stress will be transmitted to the shock absorber mount. The shock absorber mount acts as a buffer for the main frame's swing stress, thereby reducing the stress on the main frame.

[0028] On the other hand, one end of the folding shaft is fixed to the main beam, and the other end is inserted into the shock-absorbing seat. The shock-absorbing seat and the main beam are rotatably connected via the folding shaft, thereby achieving a pivoting folding effect of the frame, thereby reducing the storage space of the frame. In addition, compared with the telescopic folding structure, the pivoting folding structure provided by the present invention can reduce the space occupied by the frame after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The invention provides a two-wheeled vehicle with an exploded structure in an expanded state. Figure 1 ;

[0030] Figure 2 This is a cross-sectional structural diagram of the two-wheeled vehicle provided by the present invention in an unfolded state;

[0031] Figure 3 This is an exploded view of the cross-sectional structure of the two-wheeled vehicle provided by the present invention in the unfolded state;

[0032] Figure 4 yes Figure 1 A local enlarged view of point A;

[0033] Figure 5 yes Figure 2 A partial enlarged view of point B;

[0034] Figure 6 yes Figure 3 A partial enlarged view of point C;

[0035] Figure 7 The invention provides a two-wheeled vehicle with an exploded structure in an expanded state. Figure 2 ;

[0036] Figure 8 This is a schematic structural diagram of the two-wheeled vehicle provided by the present invention in a folded state;

[0037] Figure 9 It is a structural schematic diagram of the two-wheeled vehicle provided by the present invention in an unfolded state.

[0038] In the picture:

[0039] 100. Main beam; 200. Shock absorber seat; 210. Shock absorber seat body; 220. Protective cover; 300. Rear fork; 410. Shock absorber elastic member; 420. Connecting seat; 430. Pin; 510. Folding shaft; 520. Locking nut; 610. Locking elastic member; 620. Locking pin; 630. Unlocking button; 700. Shock absorber shaft; 1. Saddle; 2. Front fork; 3. Handlebar; 4. Front wheel assembly; 5. Rear wheel assembly. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0041] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0044] The present invention provides a frame structure suitable for two-wheeled vehicles such as bicycles, electric bicycles, and children's scooters. While having the effects of shock absorption and folding, it also has the effect of reducing the risk of shock absorption failure and can also reduce the swinging force on the beam when the shock absorption elastic part fails elastically.

[0045] Specifically, if Figures 1 to 6 As shown, the frame structure includes a beam 100, a folding shaft 510, a shock absorber seat 200, a rear fork 300 and a shock-absorbing elastic member 410. One end of the folding shaft 510 is fixed to the beam 100, and the other end is passed through the shock absorber seat 200, and the shock absorber seat 200 is rotatably connected to the beam 100 through the folding shaft 510. The shock absorber seat 200 is provided with a first shock-absorbing groove, the rear fork 300 is rotatably connected to the shock absorber seat 200, and the axis of rotation is parallel to the ground. The rear fork 300 is provided with a second shock-absorbing groove, and the first shock-absorbing groove and the second shock-absorbing groove cooperate to form a shock-absorbing cavity. The shock-absorbing elastic member 410 is placed in the shock-absorbing cavity, and one end is in contact with the inner wall of the shock-absorbing cavity, and the other end is connected to the rear fork 300. The deformation direction of the shock-absorbing elastic member 410 is perpendicular to the ground.

[0046] When the frame passes over uneven roads, speed bumps, or other areas, the rear fork 300 swings up and down with the undulations of the road surface. At this point, the rear fork 300 rotates relative to the shock absorber mount 200, with the axis of rotation parallel to the ground. The shock-absorbing elastic member 410 deforms, and the deformation direction is perpendicular to the ground. The deformation of the shock-absorbing elastic member 410 absorbs the swing amplitude of the rear fork 300, thereby achieving a shock-absorbing effect. Furthermore, the shock absorber mount 200 is rotatably connected to the beam 100 via a folding shaft 510. When the shock absorber mount 200 rotates about the folding shaft 510, the shock absorber mount 200 drives the rear fork 300 to rotate about the folding shaft 510, thereby achieving a pivoting folding effect for the frame and reducing the storage space required for the frame. Furthermore, compared to a telescopic folding structure, the pivoting folding structure provided by the present invention can reduce the space occupied by the folded frame. On the other hand, placing the shock-absorbing elastic member 410 within the shock-absorbing cavity prevents the shock-absorbing elastic member 410 from being affected or damaged by external environmental factors (such as rain, dust, and bumps), thereby extending the service life of the shock-absorbing elastic member 410 and reducing the risk of shock-absorbing failure due to elastic failure of the shock-absorbing elastic member 410. On the other hand, in the prior art, the rear fork 300 is connected to the beam 100 via an elastic member. If the elastic member fails, when the rear fork 300 swings up and down, the swing stress will be directly transmitted from the rear fork 300 to the beam 100. In the frame structure provided by the present invention, the rear fork 300 is connected to the beam 100 via the shock-absorbing seat 200. If the shock-absorbing elastic member 410 fails, the swing stress of the rear fork 300 when swinging up and down will be transmitted to the shock-absorbing seat 200. Compared with the prior art in which the swing stress is directly transmitted to the beam 100, the shock-absorbing seat 200 of the present invention acts as a buffer for the swing stress of the beam 100, thereby reducing the swing stress experienced by the beam 100.

[0047] Furthermore, the shock-absorbing elastic member 410 may be an elastic element such as a spring or elastomeric rubber.

[0048] Preferably, if Figures 4 to 6 As shown, the axis of the folding shaft 510 is perpendicular to the ground, that is, when the frame is folded, the rotation axis of the rear fork 300 and the shock absorber seat 200 is perpendicular to the ground, thereby reducing the height dimension of the frame after folding, and further reducing the space occupied by the frame after folding.

[0049] Alternatively, as Figures 4 to 6As shown, the shock-absorbing seat 200 includes a shock-absorbing seat body 210 and a protective cover 220. The protective cover 220 is sleeved on the outside of the shock-absorbing seat body 210. The first shock-absorbing groove is provided on the shock-absorbing seat body 210. The provision of the protective cover 220 realizes the protection of the shock-absorbing seat body 210. It is understandable that the protective cover 220 and the shock-absorbing seat body 210 can be fixedly connected or detachably connected. It is also understandable that in other embodiments, the protective cover 220 can be omitted and the shock-absorbing seat body 210 can be directly provided, which can be set according to actual needs.

[0050] Alternatively, as Figures 4 to 6 As shown, the frame structure provided by the present invention also includes a connecting seat 420, which is disposed within the shock-absorbing cavity. The other end of the shock-absorbing elastic member 410 is in contact with the connecting seat 420, and the connecting seat 420 is detachably connected to the rear fork 300. When the shock-absorbing elastic member 410 needs to be replaced, the connecting seat 420 and the rear fork 300 can be disassembled, and the shock-absorbing elastic member 410 can then be removed from the shock-absorbing cavity for replacement. In the technical solution provided by the present invention, the connecting seat 420 and the rear fork 300 are detachably connected via a pin 430. Of course, in other embodiments, this connection can also be achieved via other connecting members such as bolts and snaps.

[0051] Preferably, if Figures 4 to 7 As shown, the frame structure provided by the present invention further includes a shock-absorbing shaft 700, which is disposed through the rear fork 300 and the shock-absorbing seat 200 to achieve a rotational connection between the rear fork 300 and the shock-absorbing seat 200. The folding shaft 510 is disposed through the shock-absorbing shaft 700. Since the axis of rotation of the rear fork 300 relative to the shock-absorbing seat 200 is parallel to the ground (i.e., the axis of the shock-absorbing shaft 700 is parallel to the ground), and the axis of the folding shaft 510 is perpendicular to the ground, it can be seen that the shock-absorbing shaft 700 and the axis of the folding shaft 510 are perpendicular. When the folding shaft 510 is disposed through the shock-absorbing shaft 700, the shock-absorbing shaft 700 provides circumferential support for the folding shaft 510, thereby reducing the probability of the folding shaft 510 breaking.

[0052] Furthermore, if Figures 4 to 7 As shown, the frame structure provided by the present invention also includes a locking nut 520. The other end of the folding shaft 510 passes through the protective cover 220 and is provided with an external thread. The other end of the folding shaft 510 is threadedly connected to the locking nut 520 to lock the relative position of the shock absorber seat 200 and the beam 100. After the shock absorber seat 200 and the rear fork 300 are rotated to a certain position (which can be when the vehicle is unfolded, folded, or any position between the unfolded and folded states), the locking nut 520 is screwed to achieve the locking of the relative position of the shock absorber seat 200 and the beam 100.

[0053] Alternatively, as Figures 4 to 7As shown, the frame structure provided by the present invention also includes a locking elastic member 610 and a locking pin 620. The locking elastic member 610 is installed on the beam 100, and the locking pin 620 is fixed on the locking elastic member 610. The shock absorber seat 200 is provided with a locking hole, and the axial direction of the locking hole is parallel to the deformation direction of the locking elastic member 610. When the locking elastic member 610 is in a natural state, the locking pin 620 extends into the locking hole to lock the relative position of the shock absorber seat 200 and the beam 100. When the locking elastic member 610 is in a compressed state, the locking pin 620 extends out of the locking hole to unlock the relative position of the shock absorber seat 200 and the beam 100, thereby forming another locking method for the relative position of the shock absorber seat 200 and the beam 100.

[0054] Alternatively, as Figures 4 to 7 As shown, a receiving hole is opened on the beam 100, and the above-mentioned locking elastic member 610 is arranged in the receiving hole to prevent the locking elastic member 610 from being damaged due to external environmental factors, which has the effect of extending the service life of the locking elastic member 610.

[0055] Optionally, the locking elastic member 610 may be an elastic element such as a spring or elastomeric rubber.

[0056] Furthermore, if Figures 4 to 7 As shown, the frame structure provided by the present invention also includes an unlocking button 630. The locking hole is a through hole. The unlocking button 630 is movably disposed within the locking hole. One end of the unlocking button 630 engages with the locking pin 620, while the other end extends out of the locking hole or is flush with the edge of the locking hole. Pressing the unlocking button 630 at the other end of the unlocking button 630 pushes the locking pin 620 to squeeze the locking elastic member 610, compressing the locking elastic member 610 and extending the locking pin 620 out of the locking hole, thereby releasing the lock between the shock absorber 200 and the beam 100. Accordingly, releasing the unlocking button 630 causes the locking elastic member 610 to rebound, driving the locking pin 620 into the locking hole, thereby locking the shock absorber 200 and the beam 100 relative to each other. Pressing the unlocking button 630 deforms the locking elastic member 610, thereby unlocking and locking the shock absorber 200 relative to the beam 100. This arrangement not only simplifies the structure but also the unlocking and locking operations.

[0057] In the technical solution provided by the present invention, the aforementioned locking holes include a first locking hole and a second locking hole. The first locking hole is provided in the shock-absorbing seat body 210, and the second locking hole is provided in the protective cover 220. Both the first and second locking holes are through holes and are coaxially arranged. When the locking elastic member 610 is in its natural state, the locking pin 620 extends into the first locking hole. When the locking elastic member 610 is in its compressed state, the locking pin 620 extends out of the first locking hole. An unlocking button 630 is movably disposed within the second locking hole.

[0058] Furthermore, if Figures 4 to 7 As shown, the second locking hole is provided with a closing structure. When the locking elastic member 610 is in its natural position, the other end of the unlocking button 630 abuts against the inner wall of the closing. At this point, the unlocking button 630 abuts between the locking pin 620 and the inner wall of the closing, securing the unlocking button 630 within the second locking hole and improving the consistency of the vehicle frame structure. Furthermore, when the shock absorber 200 and the beam 100 are locked, the inner wall of the closing provides support for the unlocking button 630, which in turn provides support for the locking pin 620, preventing the locking pin 620 from falling from the first locking hole into the second locking hole and effectively improving locking reliability.

[0059] It can be understood that the locking elastic member 610, the locking pin 620 and the locking hole are arranged in groups, and multiple groups of locking elastic members 610, locking pins 620 and locking holes can be provided. At least one group of locking elastic members 610, locking pins 620 and locking holes are provided in the unfolded position and the folded position of the frame, so as to achieve the effect that the frame can be locked in position both after unfolding and folding.

[0060] As a preferred solution, the external thread of the folding shaft 510, the locking nut 520, the locking elastic member 610, the locking pin 620 and the locking hole are simultaneously arranged on the frame to achieve a double-layer locking effect of the frame structure, that is, the locking nut 520 and the thread of the folding shaft 510 cooperate to form the first layer of locking, and the locking elastic member 610, the locking pin 620 and the locking hole form the second layer of locking, so as to achieve a structural effect that improves the stability of the frame in both the folding and unfolding states.

[0061] The following is a brief description of the folding operation of the frame structure:

[0062] like Figures 4 to 8 As shown, unscrew the locking nut 520, and then press the unlocking button 630 to extend the locking pin 620 out of the first locking hole, thereby releasing the locking relationship between the shock absorber seat 200 and the beam 100, and rotating the shock absorber seat 200 or the rear fork 300 to rotate the shock absorber seat 200 around the folding shaft 510 to achieve folding of the frame structure.

[0063] The present invention also provides a two-wheeled vehicle, such as Figure 9 As shown, the bicycle comprises a saddle 1, a front fork 2, a handlebar 3, a front wheel assembly 4, a rear wheel assembly 5 and the above-mentioned frame structure. The saddle 1 is arranged on the beam 100 of the frame structure, the front fork 2 is rotatably connected to the beam 100, the handlebar 3 is rotatably connected to the front fork 2, the front wheel assembly 4 is rotatably connected to the front fork 2, and the rear wheel assembly 5 is rotatably connected to the rear fork 300 of the frame structure.

[0064] This two-wheeled vehicle combines both shock absorption and pivoting folding functions, effectively improving riding comfort and safety while reducing the space occupied by the vehicle when stored. Secondly, the shock-absorbing elastic member 410 of the two-wheeled vehicle is disposed within the shock-absorbing cavity, effectively extending the service life of the shock-absorbing elastic member 410 and reducing the risk of shock absorption failure due to elastic failure of the shock-absorbing elastic member 410. Thirdly, the rear fork 300 of the two-wheeled vehicle is connected to the main beam 100 via the shock-absorbing seat 200. When the elasticity of the shock-absorbing elastic member 410 weakens or fails, the swinging stress of the rear fork 300 during its up and down swinging will be transmitted to the shock-absorbing seat 200, effectively buffering the swinging stress of the main beam 100.

[0065] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A frame structure, characterized in that: include: beam (100); a folding shaft (510), one end of the folding shaft (510) being fixed on the beam (100); A shock-absorbing seat (200), wherein the other end of the folding shaft (510) is passed through the shock-absorbing seat (200), and the shock-absorbing seat (200) is rotatably connected to the beam (100) via the folding shaft (510), and the shock-absorbing seat (200) is provided with a first shock-absorbing groove; A rear fork (300), wherein the rear fork (300) is rotatably connected to the shock-absorbing seat (200), and the axis of rotation is parallel to the ground; the rear fork (300) is provided with a second shock-absorbing groove, and the first shock-absorbing groove and the second shock-absorbing groove cooperate to form a shock-absorbing cavity; a shock-absorbing elastic member (410), the shock-absorbing elastic member (410) being placed in the shock-absorbing cavity, with one end being in contact with the inner wall of the shock-absorbing cavity and the other end being connected to the rear fork (300), and the deformation direction of the shock-absorbing elastic member (410) being perpendicular to the ground; A locking nut (520), the other end of the folding shaft (510) passes through the shock-absorbing seat (200) and is provided with an external thread, and the other end of the folding shaft (510) is threadedly connected to the locking nut (520) to lock the relative position of the shock-absorbing seat (200) and the beam (100); The shock-absorbing seat (200) comprises a shock-absorbing seat body (210) and a protective cover (220), wherein the protective cover (220) is sleeved on the outside of the shock-absorbing seat body (210), and the first shock-absorbing groove is provided on the shock-absorbing seat body (210). The provision of the protective cover (220) realizes a protective effect on the shock-absorbing seat body (210).

2. The frame structure according to claim 1, characterized in that: The invention also includes a locking elastic member (610) and a locking pin (620), wherein the locking elastic member (610) is installed on the beam (100), and the locking pin (620) is fixed on the locking elastic member (610). The shock-absorbing seat (200) is provided with a locking hole, and the axial direction of the locking hole is parallel to the deformation direction of the locking elastic member (610). When the locking elastic member (610) is in a natural state, the locking pin (620) extends into the locking hole to lock the relative position of the shock-absorbing seat (200) and the beam (100). When the locking elastic member (610) is in a compressed state, the locking pin (620) extends out of the locking hole to unlock the relative position of the shock-absorbing seat (200) and the beam (100).

3. The frame structure according to claim 2, characterized in that: The invention also includes an unlocking button (630), wherein the locking hole is a through hole, and the unlocking button (630) is movably arranged in the locking hole, and one end of the unlocking button (630) can be fitted with the locking pin (620). When the unlocking button (630) is pressed at the other end of the unlocking button (630), the locking elastic member (610) is compressed, and when the unlocking button (630) is released, the locking elastic member (610) rebounds.

4. The vehicle frame structure according to claim 3, characterized in that: The locking hole is provided with a closing opening, and when the locking elastic member (610) is in a natural state, the other end of the unlocking button (630) fits against the inner wall of the closing opening.

5. The vehicle frame structure according to any one of claims 1 to 4, characterized in that: The axis of the folding shaft (510) is perpendicular to the ground.

6. The vehicle frame structure according to claim 5, characterized in that: It also includes a shock-absorbing rotating shaft (700), the rear fork (300) and the shock-absorbing seat (200) are rotatably connected via the shock-absorbing rotating shaft (700), and the folding rotating shaft (510) is arranged through the shock-absorbing rotating shaft (700).

7. The vehicle frame structure according to any one of claims 1 to 4, characterized in that: It also includes a connecting seat (420), which is arranged in the shock-absorbing cavity, and the other end of the shock-absorbing elastic member (410) is in contact with the connecting seat (420), and the connecting seat (420) is detachably connected to the rear fork (300).

8. The vehicle frame structure according to any one of claims 2 to 4, characterized in that: The beam (100) is provided with a receiving hole, and the locking elastic member (610) is placed in the receiving hole.

9. A two-wheeled vehicle, characterized in that: The bicycle comprises a saddle (1), a front fork (2), a handlebar (3), a front wheel assembly (4), a rear wheel assembly (5) and a frame structure according to any one of claims 1 to 8, wherein the saddle (1) is arranged on a beam (100) of the frame structure, the front fork (2) is rotationally connected to the beam (100), the handlebar (3) is rotationally connected to the front fork (2), the front wheel assembly (4) is rotationally connected to the front fork (2), and the rear wheel assembly (5) is rotationally connected to a rear fork (300) of the frame structure.

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