Shock-absorbing connection apparatus, vehicle frame, and vehicle

Abstract

A shock-absorbing connection apparatus (400), a vehicle frame, and a vehicle. The shock-absorbing connection apparatus (400) connects a front support (100), a rear support (200), and a seat support (300) of a vehicle frame. The shock-absorbing connection apparatus (400) comprises: a front joint (410), a rear joint (420), a middle joint (430), and a buffer member (440). The front joint (410) and the middle joint (430) are rotatably connected by means of a first pin shaft (401), the middle joint (430) and the rear joint (420) are rotatably connected by means of a second pin shaft (402), and the front joint (410) and the rear joint (420) are rotatably connected by means of a third pin shaft (403). The buffer member (440) is provided between the middle joint (430) and the front joint (410) or the rear joint (420), so as to deform when the front joint (410) or the rear joint (420) rotates relative to the middle joint (430).

Description

Shock-absorbing connecting device, frame and vehicle

[0001] Related applications

[0002] This application claims priority to Chinese patent applications with application numbers CN2023112539252 filed on September 27, 2023 and CN2024107575450 filed on June 13, 2024. Technical Field

[0003] The present disclosure relates to a shock-absorbing frame and a vehicle having a shock-absorbing connecting device. In particular, the vehicle is a bicycle or an electric bicycle. Background Art

[0004] To improve riding comfort, existing bicycles generally install a shock-absorbing mechanism under the seat. The elastic shock-absorbing direction of the shock-absorbing mechanism is set in the vertical direction, and the shock-absorbing mechanism applies an upward force to the seat during shock absorption. Shock absorption performance has a significant impact on the comfort of the bicycle. Some bicycles also install the shock absorber on the front wheel fork or the rear wheel fork, or on both the front and rear wheel forks. This leads to a complex bicycle structure and increased costs. In particular, it increases the overall weight of the frame, which is not conducive to the lightweight design of the bicycle. For example, an existing bicycle frame structure uses two elastic components, which are respectively arranged between the front frame and the seat bracket and between the rear frame and the seat bracket. Although it can achieve front wheel shock absorption and rear wheel shock absorption, the overall structure is complex and the overall weight of the frame is increased.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.

[0006] Summary of the Invention

[0007] The present disclosure relates to a shock-absorbing connecting device, a shock-absorbing frame having the same, and a bicycle or an electric bicycle. The shock-absorbing connecting device has a simplified structure while having good shock-absorbing and buffering performance, and has good structural stability, which is conducive to lightweighting of the frame.

[0008] A first aspect of the present disclosure provides a shock-absorbing connection device for a vehicle frame, for connecting a front bracket, a rear bracket, and a seat bracket of the vehicle frame, the shock-absorbing connection device comprising:

[0009] a front joint for connecting to the rear end of the front bracket;

[0010] a rear joint for connecting to the front end of the rear bracket;

[0011] a middle joint for connecting the lower end of the seat support; and

[0012] a cushioning member capable of deformation;

[0013] The front joint and the middle joint are rotatably connected via a first pin, the middle joint and the rear joint are rotatably connected via a second pin, and the front joint and the rear joint are movably connected via a third pin, and are configured to allow the front joint or the rear joint to flip up and down relative to the middle joint;

[0014] The buffer member is disposed between the middle joint and the front joint or the rear joint, so as to be deformed when the front joint or the rear joint rotates relative to the middle joint.

[0015] In some embodiments, the rear end of the buffer is connected to the third pin shaft. When the front joint or the rear joint is flipped up and down relative to the middle joint, the third pin shaft moves forward and backward to deform or reset the buffer member.

[0016] In some embodiments, the front end portion of the buffer is rotatably connected to the middle joint.

[0017] In some embodiments, a front stopper is provided at the front of the middle joint, the front stopper having a front stopper surface facing rearward, a rear stopper is provided on the front joint or the rear joint, the rear stopper having a rear stopper surface facing forward, at least a portion of the front stopper surface and the rear stopper surface are plane, and the buffer is confined between the front stopper surface and the rear stopper surface so as to deform when the front joint or the rear joint rotates relative to the middle joint. The above-mentioned shock-absorbing connection device realizes the movable connection between the front bracket, the rear bracket and the seat bracket, thereby realizing the linkage shock absorption of the frame, with good shock absorption effect. Moreover, because only one set of shock-absorbing connection devices is provided, the overall structure of the frame is simplified, which is conducive to the lightweighting of the frame and has good structural stability. In particular, the structure of the middle joint and the front joint or the rear joint itself is used to limit the buffer, and there is no need to set up a separate limit or positioning mechanism, which further helps to simplify the structure and lightweight the vehicle.

[0018] In some embodiments, the front end of the buffer member abuts against the front limiting surface, and the rear end of the buffer member abuts against the rear limiting surface.

[0019] In some embodiments, during the process of flipping the front joint or the rear joint relative to the middle joint, the front limiting surface and the rear limiting surface are parallel to each other.

[0020] In some embodiments, the rear stopper is rotatably disposed on the front joint via a fourth pin, and the rear joint has an abutment portion that abuts against the rear side of the rear stopper; or, the rear stopper is rotatably disposed on the rear joint via a fourth pin, and the front joint has an abutment portion that abuts against the rear side of the rear stopper;

[0021] The abutting portion is configured to maintain the rear limiting surface parallel to the front limiting surface.

[0022] In some embodiments, the rear limit member is suspended on the front joint through the fourth pin shaft, and the abutment portion has an arc-shaped abutment surface protruding forward. During the flipping of the front joint or the rear joint relative to the middle joint, the rear limit member and the abutment surface slide together to keep the rear limit surface vertical.

[0023] In some embodiments, an installation space is formed between the middle joint and the rear limit member, and the buffer member is arranged in the installation space and is confined in the installation space; the buffer member is arranged along the front-to-back direction and can be deformed along the front-to-back direction; the buffer member includes a compression spring or a gas spring.

[0024] In some embodiments, the front limiting member has a front limiting groove, and the front end of the buffer member is located in the front limiting groove; the rear limiting member has a rear limiting groove, and the rear end of the buffer member is located in the rear limiting groove.

[0025] In some embodiments, the middle joint includes two side panels and a connecting tube, the two side panels are spaced apart on the left and right, the connecting tube is connected between the upper parts of the two side panels, and a first through hole extending in the up and down directions is provided on the connecting tube, and the lower end portion of the seat bracket passes through the through hole; the first pin shaft is arranged in the connecting tube and passes through the front joint, the side panel and the lower end portion of the seat bracket.

[0026] In some embodiments, the lower end of the middle joint and the lower end of the rear joint are rotatably connected via the second pin shaft, the lower end of the front joint and the upper end of the rear joint are rotatably connected via the third pin shaft, and at least one of the lower end of the front joint and the upper end of the rear joint is provided with an axial hole that cooperates with the third pin shaft, and the axial hole is a waist-shaped hole or an arc-shaped hole, and the third pin shaft can be slidably inserted in the axial hole to allow the front joint and the rear joint to move relative to each other.

[0027] In some embodiments, a pedal tube for mounting a pedal is provided on the rear joint, and the pedal tube is located at the rear side of the second pin shaft.

[0028] In some embodiments, the rear limit member and the rear joint are fixedly connected or integrally provided; or, the rear limit member and the front joint are fixedly connected or integrally provided.

[0029] Another aspect of the present disclosure provides a vehicle frame comprising a front support with a front wheel, a rear support with a rear wheel, and a seat support with a seat, wherein the front support, the rear support, and the seat support are connected via the shock-absorbing connection device.

[0030] In some embodiments, the rear support comprises:

[0031] A rear wheel seat, which is used to mount the rear wheel;

[0032] an upper link having a front end hinged to the shock-absorbing connecting device and a rear end hinged to the rear wheel seat; and

[0033] A lower connecting rod has a front end hinged to the shock absorbing connecting device and a rear end hinged to the rear wheel seat.

[0034] In some embodiments, the upper connecting rod is located above the lower connecting rod; the front end of the upper connecting rod is hinged to the third pin, and the front end of the lower connecting rod is hinged to the second pin.

[0035] The present disclosure also provides a bicycle, comprising a frame, wherein the frame comprises the shock-absorbing connection device or comprises the frame.

[0036] The present disclosure also provides an electric bicycle, comprising a frame and a battery, wherein the frame comprises a front bracket provided with a front wheel, a rear bracket provided with a rear wheel, and a seat bracket provided with a seat, the battery being arranged on the front bracket or the rear bracket, and the frame further comprising the shock-absorbing connecting device or comprising the frame.

[0037] The present disclosure also provides a shock-absorbing frame, comprising:

[0038] A front bracket, used for mounting the front wheel and steering assembly;

[0039] A rear bracket, the rear bracket being used to mount the rear wheel, the rear bracket being movably connected to the rear end of the front bracket via the front end thereof;

[0040] A seat bracket, the seat bracket being used to mount the seat and the elastic shock-absorbing assembly, the elastic shock-absorbing assembly being rotatably connected to the seat bracket via its front end;

[0041] The front bracket and the rear bracket are rotatably connected to the seat bracket via a first pivot and a second pivot respectively, wherein the first pivot is located above the second pivot;

[0042] At least one of the front bracket and the rear bracket is rotatably connected to the rear end of the elastic shock-absorbing assembly via a third pivot, the third pivot being located between the first pivot and the second pivot, and the front end of the elastic shock-absorbing assembly being located forward of a line connecting the first pivot and the second pivot;

[0043] The elastic shock absorbing component has an initial position and a compressed position:

[0044] When the elastic shock-absorbing assembly is located at the initial position, the front wheel and the rear wheel are not lifted, and the third pivot is located at the first position;

[0045] When the elastic shock-absorbing assembly is located at the compressed position, the front wheel and / or the rear wheel is lifted, and the third pivot moves forward from the first position to the second position.

[0046] In some embodiments, the rear end of the front bracket is bent downward to form a first bending portion, and the front end of the rear bracket is bent upward to form a second bending portion, and the first bending portion is movably connected through its lower end and the upper end of the second bending portion.

[0047] In some embodiments, at least one of the first bending portion and the second bending portion is rotatably connected to the rear end of the elastic shock absorbing assembly through the third pivot.

[0048] In some embodiments, when the front wheel is lifted, the first bending portion rotates forward around the first pivot; when the rear wheel is lifted, the second bending portion rotates forward around the second pivot.

[0049] In some embodiments, the seat support is arranged in the up-down direction, the lower portion of the seat support protrudes forward to form a front convex portion, and the elastic shock absorbing assembly is rotatably connected to the front convex portion through its front end.

[0050] In some embodiments, one of the front bracket and the rear bracket is provided with a first circular hole for the third pivot to pass through, and the other is provided with a first long hole for the third pivot to pass through.

[0051] In some embodiments, one of the front bracket and the rear bracket is provided with a second circular hole for the third pivot to pass through, and the two are movably connected by a fourth pivot, one of the front bracket and the rear bracket is provided with a third circular hole for the fourth pivot to pass through, and the other of the front bracket and the rear bracket is provided with a second long hole for the fourth pivot to pass through.

[0052] In some embodiments, the elastic expansion and contraction direction of the elastic shock-absorbing component is set along the front-to-back horizontal direction.

[0053] In some embodiments, when the elastic shock-absorbing assembly is in the initial position, the first position of the third pivot is located behind the line connecting the first pivot and the second pivot; when the elastic shock-absorbing assembly is in the compressed position, the second position of the third pivot is located in front of the line connecting the first pivot and the second pivot.

[0054] A bicycle comprises the shock-absorbing frame.

[0055] The bicycle frame disclosed herein realizes the movable connection between the front bracket, the rear bracket and the seat bracket through the above-mentioned shock-absorbing connecting device, thereby realizing the linked shock absorption of the frame and having a good shock absorption effect. Moreover, because only one set of shock-absorbing connecting devices is provided, the overall structure of the frame is simplified, which is conducive to the lightweight of the frame and has good structural stability. The elastic shock-absorbing member is connected to the seat bracket through its front end. When the front wheel or the rear wheel is lifted, the elastic shock-absorbing member can be rotated forward by the front bracket or the rear bracket to compress the elastic shock-absorbing member, which not only realizes the front wheel shock absorption or the rear wheel shock absorption, but also provides a forward thrust to the seat bracket through the elastic shock-absorbing member, thereby reducing the difficulty of riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solution of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0057] FIG1 is a structural diagram of a shock-absorbing frame according to a specific embodiment of the present invention.

[0058] FIG2 is an exploded view of a shock-absorbing frame according to a specific embodiment of the present invention.

[0059] FIG3 is a structural diagram of a second frame according to an embodiment of the present invention.

[0060] FIG4 is a partial enlarged view of point A in FIG3 .

[0061] FIG5 is a perspective view of a second seat support and a shock-absorbing connection device according to an embodiment of the present invention.

[0062] FIG6 is an exploded view of a second seat support and a shock-absorbing connection device according to an embodiment of the present invention.

[0063] FIG. 7 is a structural diagram of a third vehicle frame according to an embodiment of the present invention.

[0064] FIG8 is a perspective view of a third shock-absorbing connection device according to an embodiment of the present invention at a certain viewing angle.

[0065] FIG9 is a three-dimensional view of the third shock-absorbing connection device according to an embodiment of the present invention from another perspective.

[0066] FIG. 10 is an exploded view of a third shock-absorbing connection device according to an embodiment of the present invention.

[0067] FIG11 is a cross-sectional view of a third bicycle frame according to an embodiment of the present invention, wherein the center joint and the buffer member are not shown.

[0068] FIG12 is a partial enlarged view of point B in FIG11 .

[0069] FIG. 13 is a side view of a fourth frame according to an embodiment of the present invention.

[0070] FIG. 14 is a perspective view of a fourth vehicle frame according to an embodiment of the present invention.

[0071] Wherein: 1. Front bracket; 11. First bend; 12. First slot; 2. Front wheel; 3. Steering assembly; 4. Rear bracket; 41. Second bend; 42. First round hole; 5. Rear wheel; 6. Seat bracket; 61. Front convex portion; 7. Elastic shock-absorbing assembly; 8. First pivot; 9. Second pivot; 10. Third pivot.

[0072] 100, front bracket; 101, front wheel; 102, steering member; 200, rear bracket; 201, rear wheel; 300, seat bracket; 400, shock-absorbing connecting device; 401, first pin; 402, second pin; 403, third pin; 404, fourth pin; 410, front joint; 411, shaft hole; 420, rear joint; 421, rear stopper; 421a, rear stopper surface; 422, rear stopper groove; 423, pedal tube; 424, abutment portion; 430, middle joint; 431, front stopper; 431a, front stopper surface; 432, side plate; 433, connecting tube; 434, first through hole; 435, second through hole; 440, buffer member;

[0073] 202, upper connecting rod; 203, rear wheel seat; 204, lower connecting rod. DETAILED DESCRIPTION

[0074] The technical solution of the present disclosure is further described below with reference to specific embodiments and accompanying drawings.

[0075] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the disclosed embodiments. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0076] The drawings of FIG. 1 to FIG. 14 are drawn in true proportion. To maintain the simplicity of the description, the proportions of each component are not listed one by one. However, the proportions and positions of each component should be regarded as part of the content of this description.

[0077] In the description of the embodiments of the present disclosure, it should be understood that the terms "upper", "lower", "front", "back", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present disclosure.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0079] In the present disclosure, in the embodiments of the present disclosure, unless otherwise expressly specified and 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. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is at a lower level than the second feature.

[0080] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present disclosure. In order to simplify the disclosure of the embodiments of the present disclosure, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present disclosure. In addition, the embodiments of the present disclosure may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0081] Figures 1 and 2 illustrate a shock-absorbing vehicle frame according to this embodiment, comprising a front frame 1, a rear frame 4, and a seat frame 6. The front frame 1 is used to mount the front wheel 2 and steering assembly 3, while the rear frame 4 is used to mount the rear wheel 5. A shock-absorbing connecting device flexibly connects the front frame 1, rear frame 4, and seat frame 6. The structure of the shock-absorbing connecting device is described in detail below.

[0082] The rear bracket 4 is movably connected to the rear end of the front bracket 1 at its front end. The seat bracket 6 is used to mount the seat and an elastic shock-absorbing assembly 7, also known as a cushioning element, which is elastically deformable. The elastic shock-absorbing assembly 7 is rotatably connected to the seat bracket 6 at its front end. In this embodiment, the seat bracket 6 is tilted vertically, with the lower portion of the seat bracket 6 protruding forward to form a front projection 61. The elastic shock-absorbing assembly 7 is rotatably connected to the front projection 61 at its front end. In this embodiment, the lower portion of the seat bracket 6 serves as the center joint.

[0083] The front frame 1 is connected to the seat frame 6 via a first pivot 8, and the rear frame 4 is pivotally connected to the seat frame 6 via a second pivot 9, specifically connected to the middle joint of the seat frame 6. The first pivot 8 is located above the second pivot 9, and the two are parallel to each other and parallel to the left and right horizontal directions.

[0084] The front frame 1 is rotatably connected to the seat frame 6 via a first pivot 8, the rear frame 4 is rotatably connected to the seat frame 6 via a second pivot 9, and the front frame 1 and rear frame 4 are rotatably connected via a third pivot 10. The rear end of the elastic shock-absorbing assembly 7 is rotatably connected to the third pivot 10. In the example shown in Figures 1 and 2, the front frame 1 only rotates about the pivot (first pivot 8) relative to the seat frame 6, and no relative translation occurs between the two. The rear frame 4 only rotates about the pivot (second pivot 9) relative to the seat frame 6, and no relative translation occurs between the two. In addition to rotational movement about the pivot (third pivot 10), the front frame 1 and rear frame 4 also experience a small relative translation. The front bracket 1 is provided with a first elongated hole 12 for the third pivot 10 to pass through, and the rear bracket 4 is provided with a first circular hole 42 for the third pivot 10 to pass through. The third pivot 10 is inserted into the first circular hole 42 of the rear bracket 4 and the first elongated hole 12 of the front bracket 1 and is able to move slightly within the first elongated hole 12 to allow relative deformation and movement between the front bracket 1, the rear bracket 4, and the seat bracket 6. Specifically, when the front bracket 1 rotates relative to the seat bracket 6 about the first pivot 8 under the action of an external force, the rear bracket 4 simultaneously rotates relative to the seat bracket 6 about the second pivot 9 under the action of the third pivot 10. Alternatively, when the rear bracket 4 rotates relative to the seat bracket 6 about the second pivot 9 under the action of an external force, the front bracket 1 simultaneously rotates relative to the seat bracket 6 about the first pivot 8 under the action of the third pivot 10. This achieves coordinated rotation of the front bracket 1 and the rear bracket 4 relative to the seat bracket 6. This structure achieves coordinated vibration reduction of the vehicle frame, improving the frame's vibration reduction effect.

[0085] In another embodiment, one of the front bracket 1 and the rear bracket 4 is provided with a second circular hole for the third pivot 10 to pass through, and the rear end of the elastic shock-absorbing assembly 7 is rotatably connected to the third pivot 10. The front bracket 1 and the rear bracket 4 are movably connected via a fourth pivot, which is parallel to the first pivot 8. One of the front bracket 1 and the rear bracket 4 is provided with a third circular hole for the fourth pivot to pass through, and the other is provided with a second elongated hole for the fourth pivot to pass through. With this arrangement, when the front bracket 1 and the rear bracket 4 rotate relative to the seat bracket 6, the front bracket 1 and the rear bracket 4 also have relative motion.

[0086] The third pivot 10 is located between the first pivot 8 and the second pivot 9. The front end of the elastic shock-absorbing component 7 is located in front of the line connecting the first pivot 8 and the second pivot 9. The rotation axis of the front end of the elastic shock-absorbing component 7 is parallel to the first pivot 8. The elastic shock-absorbing component 7 has an initial position and a compressed position:

[0087] When the elastic shock-absorbing assembly 7 is in the initial position, the front wheel 2 and the rear wheel 5 are not lifted, and the third pivot 10 is located behind the line connecting the first pivot 8 and the second pivot 9;

[0088] When the elastic shock absorbing assembly 7 is in the compressed position, the front wheel 2 and / or the rear wheel 5 is lifted, the third pivot 10 is located in front of the line connecting the first pivot 8 and the second pivot 9, and the elastic shock absorbing assembly 7 is compressed.

[0089] In this embodiment, the rear end of the front bracket 1 is bent downward to form a first bent portion 11 (also known as a front joint), and the front end of the rear bracket 4 is bent upward to form a second bent portion 41 (also known as a rear joint). The first bent portion 11 is movably connected to the upper end of the second bent portion 41 through its lower end, and the first pivot 8 and the second pivot 9 are respectively disposed in the first bent portion 11 and the second bent portion 41. A first circular hole 42 is provided at the upper end of the second bent portion 41, and the first circular hole 42 is higher than the second pivot 9; a first elongated hole 12 is provided at the lower end of the first bent portion 11, and the first elongated hole 12 is lower than the first pivot 8.

[0090] When the front wheel 2 is lifted, the first bent portion 11 rotates forward around the first pivot 8 to compress the elastic shock-absorbing assembly 7 forward; when the rear wheel 5 is lifted, the second bent portion 41 rotates forward around the second pivot 9 to compress the elastic shock-absorbing assembly 7 forward.

[0091] In this embodiment, when the elastic shock absorbing assembly 7 is in the initial position and the compressed position, the third pivot 10 has a first position located behind the line connecting the first pivot 8 and the second pivot 9, and a second position located in front of the line connecting the first pivot 8 and the second pivot 9. The midpoint of the line connecting the first position and the second position is located on the line connecting the first pivot 8 and the second pivot 9. In this embodiment, the elastic shock absorbing assembly 7 includes a gas spring.

[0092] A bicycle comprises the shock-absorbing frame.

[0093] The following specifically describes the use of the frame shown in Figures 1 and 2:

[0094] When the front wheel 2 encounters an obstacle, the front bracket 1 rotates clockwise to lift the front wheel 2, compressing the elastic shock-absorbing component 7 forward through the first bent portion 11, thereby absorbing the shock of the front wheel 2 and giving the seat bracket 6 a forward thrust;

[0095] When the rear wheel 5 encounters an obstacle, the rear bracket 4 rotates counterclockwise to lift the rear wheel 5, and the elastic shock-absorbing component 7 is compressed forward through the second bent portion 41, thereby reducing the shock of the rear wheel 5 and giving the seat bracket 6 a forward thrust.

[0096] Figures 2 to 6 illustrate a second vehicle frame provided by this embodiment. Referring to Figures 2 to 6 , the vehicle frame includes a front frame 100, a rear frame 200, and a seat frame 300. The front frame 100 is mounted with a front wheel 101 and a steering member 102. The steering member 102 is used to control the orientation of the front wheel 101, thereby achieving vehicle steering. The rear frame 200 is located behind the front frame 100 and is mounted with a rear wheel. The seat frame 300 extends vertically and is mounted with a seat.

[0097] The vehicle frame also includes a shock-absorbing connection device 400, which connects the front support 100, the rear support 200, and the seat support 300. Specifically, the front support 100, the rear support 200, and the seat support 300 are movably connected by only one shock-absorbing connection device 400. The shock-absorbing connection device 400 includes a front joint 410, a rear joint 420, a middle joint 430, and a buffer member 440. The front joint 410 is connected to the rear end of the front support 100 and may be fixedly connected; in other embodiments, the front joint 410 may be an integral component of the front support 100. The rear joint 420 is connected to the front end of the rear support 200 and may be fixedly connected; in other embodiments, the rear joint 420 may be an integral component of the rear support 200. The middle joint 430 is connected to the lower end of the seat support 300 and may be fixedly connected; in other embodiments, the middle joint 430 may be an integral component of the seat support 300. The buffer member 440 is deformable. When subjected to an external force, the buffer member 440 elastically deforms to provide a buffer, thereby reducing or offsetting the vibration acting on the seat support 300 and achieving a shock-absorbing effect.

[0098] The front joint 410 and the middle joint 430 are rotationally connected via a first pin 401, the middle joint 430 and the rear joint 420 are rotationally connected via a second pin 402, and the front joint 410 and the rear joint 420 are rotationally connected via a third pin 403. The axes of these three pivots are parallel to each other and extend horizontally in the left and right directions. In the example shown in Figures 2 to 6, the first pin 401 is higher than the third pin 403, and the third pin 403 is higher than the second pin 402. In the example shown in Figures 2 to 6, the front joint 410 only rotates relative to the middle joint 430 about the pivot (the first pin 401), and no relative translation occurs between the two. The rear joint 420 only rotates relative to the middle joint 430 about the pivot (the second pin 402), and no relative translation occurs between the two. In addition to the rotational movement about the pivot (the third pin 403), the front joint 410 and the rear joint 420 also experience a small relative translation. Among them, the front joint 410 is provided with an axial hole 411, which is a waist-shaped hole or an elongated hole, and the rear joint 420 is provided with a circular hole matching the third pin shaft 403. The third pin shaft 403 is inserted into the circular hole of the rear joint 420 and the above-mentioned axial hole 411 and can make a small movement in the axial hole 411 to allow relative deformation movement between the front joint 410, the rear joint 420 and the middle joint 430. That is, when the front joint 410 rotates around the first pin 401 relative to the middle joint 430 under the action of external force, the rear joint 420 rotates around the second pin 402 relative to the middle joint 430 under the action of the third pin 403. Or when the rear joint 420 rotates around the second pin 401 relative to the middle joint 430 under the action of external force, the front joint 410 rotates around the first pin 401 relative to the middle joint 430 under the action of the third pin 403, so as to realize the coordinated rotation of the front joint 410 and the rear joint 420 equivalent to the middle joint 430. Such a structure can realize the coordinated shock absorption of the vehicle frame, so that the shock absorption effect of the vehicle frame is better. In the actual structural design, the direction and size of the waist-shaped hole or the long hole are best when the moving distance of the third pin 403 in the waist-shaped hole or the long hole reaches the minimum value, and the coordinated shock absorption effect of the frame is the best. In some other embodiments, the shaft hole 411 may also be provided on the rear joint 420 , and a circular hole matching the third pin shaft 403 is opened on the front joint 410 .

[0099] A front stopper 431 is provided at the front portion of the middle joint 430. The front stopper 431 has a front stopper surface facing rearward. A rear stopper 421 is provided on the front joint 410 or the rear joint 420. The rear stopper 421 has a rear stopper surface facing forward. The buffer 440 is constrained between the front stopper surface of the front stopper 431 and the rear stopper surface of the rear stopper 421 to deform when the front joint 410 or the rear joint 420 rotates relative to the middle joint 430. Specifically, in the embodiment shown in Figures 2 to 6, the rear stopper 421 is provided on the rear joint 420. The front stopper 431 is located in front of the rear stopper 421. The buffer 440 also extends as a whole in the front-to-back direction and is capable of elastic deformation in the front-to-back direction. At least portions of the front stopper surface and the rear stopper surface are planar.

[0100] In the examples shown in Figures 2 to 6, the buffer 440 is a compression spring. The front end of the buffer 440 contacts and fits with the front limit member 431, and the rear end of the buffer 440 contacts and fits with the rear limit member 421. The front limit member 431 has a front limit groove, and the front limit surface is the bottom wall of the front limit groove. The front end of the buffer 440 is located in the front limit groove and abuts against the front limit surface. The rear limit member 421 has a rear limit groove 422, and the rear limit surface is the bottom wall of the rear limit groove. The rear end of the buffer 440 is located in the rear limit groove 422 and abuts against the rear limit surface. Furthermore, an installation space is enclosed between the middle joint 430 and the rear limit member 421, and the buffer 440 is arranged in the installation space and is confined in the installation space. The left and right side plates of the middle joint 430 limit the buffer member 440 in the left and right directions, and cooperate with the front limit member 431 and the rear limit member 421 to confine the buffer member 440 in the installation space without falling off or detaching.

[0101] The middle joint 430 includes two side panels 432 and a connecting tube 433. The two side panels 432 are arranged at intervals on the left and right. The connecting tube 433 is connected between the upper parts of the two side panels 432. The connecting tube 433 is provided with a first through hole extending in the up-down direction. The lower end of the seat bracket 300 passes through the through hole and is fixedly connected to the connecting tube 433 to connect the middle joint 430 to the seat bracket 300; the first pin shaft 401 is provided in the connecting tube 433 and passes through the front joint 410, the side panel 432 and the lower end of the seat bracket 300 to realize the rotational connection between the front joint 410 and the middle joint 430.

[0102] Furthermore, the lower end of the middle joint 430 and the lower end of the rear joint 420 are rotatably connected via a second pin 402, and the lower end of the front joint 410 and the upper end of the rear joint 420 are rotatably connected via a third pin 403. A pedal tube 423 for mounting a pedal is provided on the rear joint 420 and is located behind the second pin 402. The third pin 403 is located behind the rear stop 421.

[0103] This embodiment also provides a bicycle comprising the aforementioned frame, wherein a front wheel 101 is mounted on a front support 100 of the frame, and a rear wheel is mounted on a rear support 200. The bicycle is specifically driven forward by human power. Specifically, pedals are mounted on a rear joint 420. By pedaling the pedals, in conjunction with a chain and sprockets, the rear wheel rotates, causing the bicycle to move forward.

[0104] This embodiment also provides an electric bicycle, comprising a battery and the aforementioned frame. A front wheel 101 is mounted on a front frame 100, and a rear wheel is mounted on a rear frame 200. The battery is mounted on either the front frame 100 or the rear frame 200. The battery drives the front wheel 101 or the rear wheel to rotate, causing the electric bicycle to travel forward. The electric bicycle is typically an electric bicycle or an electric power-assisted bicycle.

[0105] The shock absorption principle of this frame is as follows: when traveling on undulating terrain, if the front wheel 101 encounters a slope and lifts upward, the front bracket 100 and front joint 410 tilt upward toward the road surface. Simultaneously, the frame is subjected to impact force, and the seat bracket 300 moves downward under the action of the human body's weight. Under the action of the third pin 403, the rear bracket 200 and rear joint 420 synchronously tilt upward toward the road surface relative to the seat bracket 300 and middle joint 430. The buffer 440 is compressed, cushioning and absorbing shock. Because the front bracket 100 and rear bracket 200 simultaneously exert force on the buffer 440, the frame achieves coordinated shock absorption. Similarly, when the rear wheel 201 encounters a slope and lifts upward, the shock absorption principle is the same as described above.

[0106] The frame utilizes a specific shock-absorbing connection device 400 to articulate the front support 100, rear support 200, and seat support 300, achieving coordinated shock absorption for the frame and achieving effective shock absorption. Furthermore, the use of only one set of shock-absorbing connection devices 400 simplifies the overall structure of the frame, contributing to frame lightweighting while also maintaining good structural stability. In particular, the structure of the center joint 430 and the front joint 410 or rear joint 420 inherently limits the position of the buffer member 440, eliminating the need for separate limiting or positioning mechanisms, further simplifying the structure and reducing the weight of the frame.

[0107] Figures 7 through 12 illustrate a third type of vehicle frame provided by this embodiment, which differs from the vehicle frame shown in Figures 2 through 6 only in its shock-absorbing connection. Referring to Figures 7 through 12 , this shock-absorbing connection includes a front joint, a rear joint, a center joint, a front stopper, a rear stopper, and a buffer. The front joint 410 is connected to the rear end of the front support 100, the rear joint 420 is connected to the front end of the rear support 200, and the center joint 430 is connected to the lower end of the seat support 300.

[0108] Furthermore, the third pin 403 sequentially passes through the front joint 410, the rear joint 420, and the middle joint 430. The middle joint 430 is provided with a first through hole 434. The first through hole 434 is an arc-shaped hole or a long hole. During the relative movement of the front joint 410 and the rear joint 420, the third pin 403 also moves in the first through hole 434. This configuration helps to improve the stability of the shock-absorbing connection device 400.

[0109] In the examples shown in FIG. 7 to FIG. 12 , the front stopper 431 and the middle joint 430 are integrated, and the rear joint 420 is movably provided on the front joint 410 or the rear joint 420 .

[0110] The front stopper 431 has a front stopper surface 431a that contacts and mates with the front end of the buffer 440, and the rear stopper 421 has a rear stopper surface 421a that contacts and mates with the rear end of the buffer 440. At least portions of the front stopper surface 431a and the rear stopper surface 421a are planar; in the example shown in the accompanying drawings, the entire front stopper surface 431a and the rear stopper surface 421a are planar and parallel to each other. The front and rear ends of the buffer 440 respectively abut against the front stopper surface 431a and the rear stopper surface 421a, and deform linearly therebetween, substantially without bending or bulging outward. Furthermore, no other connecting components are provided between the buffer 440 and the front stopper 431, or between the buffer 440 and the rear stopper 421. When the front wheel 101 or the rear wheel 201 turns upward due to uneven ground conditions, the front limiting surface 431a of the front limiting member 431 and the rear limiting surface 421a of the rear limiting member 421 remain substantially parallel. This configuration prevents the buffer member 440 from bending and eliminates the risk of the buffer member 440 bulging or even flying out.

[0111] In the example shown in Figures 7 to 12, the rear stopper 421 is rotatably mounted on the front joint 410 via a fourth pin 404. The rear joint 420 includes an abutment portion 424 that abuts against the rear side of the rear stopper 421. The abutment portion 424 is configured to maintain the rear stopper surface 421a parallel to the front stopper surface 431a. In another embodiment, the rear stopper 421 may be rotatably mounted on the rear joint 420 via a fourth pin 404. The front joint 410 includes an abutment portion 424 that abuts against the rear side of the rear stopper 421. The abutment portion 424 is configured to maintain the rear stopper surface 421a parallel to the front stopper surface 431a.

[0112] Furthermore, the rear stopper 421 is suspended on the front joint 410 via the fourth pin 404, and the abutment portion 424 has an arcuate, forwardly protruding abutment surface. During the process of flipping the front joint 410 or the rear joint 420 relative to the middle joint 430, the rear stopper 421 and the abutment surface slide together to maintain the rear stopper surface 421a parallel to the front stopper surface 431a.

[0113] The fourth pin 404 sequentially passes through the front joint 410, the middle joint 430, and the rear stopper 421, suspending the rear stopper 421 from the front joint 410. The middle joint 430 is provided with a second through-hole 435, which is an arc-shaped hole or an elongated hole, the center of which falls on the axis of the fourth pin 404. The upper end of the rear stopper 421 defines a pin hole for the fourth pin 404 to pass through. During the process of flipping the front joint 410 or the rear joint 420 relative to the middle joint 430, the rear stopper 421 rotates accordingly. With the cooperation of the abutment portion 424, the rear stopper 421's rear stopper surface 421a always remains parallel to the front stopper surface 431a of the front stopper 431, ensuring that the buffer 440 remains positioned in the front-to-back direction and does not bend or bulge outward. This configuration helps to improve the stability of the structure and eliminates the risk of the buffer member 440 bulging or flying outward.

[0114] The shock absorption principle of this frame is as follows: When traveling on uneven ground, if the front wheel 101 lifts upward, the front joint 410 tilts downward, forcing the rear joint 420 and the middle joint 430 closer together, compressing the buffer 440 and damping the vibration. If the rear wheel 201 lifts upward, the rear joint 420 tilts downward and forward, causing the rear stopper 421 to move closer to the front stopper 431, and compressing the buffer 440 and damping the vibration. Regardless of whether the front wheel 101 or the rear wheel 201 tilts, although the front-to-back distance between the front stopper 431 and the rear stopper 421 changes, causing the buffer 440 to deform or reset accordingly, the rear stopper 421 rotates a certain angle accordingly, maintaining its rear stopper surface 421a parallel to the front stopper surface 431a on the front side.

[0115] In addition to providing a buffering and shock-absorbing function, the frame further improves structural stability and reduces or even eliminates the risk of the buffer member bending, bulging, or even flying outward.

[0116] Figures 13 and 14 illustrate a fourth vehicle frame according to this embodiment. Referring to Figures 13 and 14 , the structure of the shock-absorbing connection device 400 is substantially the same as that of the embodiment shown in Figures 1 and 2 , with the primary difference being the structure of the rear frame 200. In the embodiment shown in Figures 1 and 2 , the front end of the rear frame 200 is fixed to the rear joint 420 , and the axle of the rear wheel 201 is rotatably connected to the rear end of the rear frame 200 . In contrast, in Figures 13 and 14 , the rear frame 200 includes a rear wheel seat 203 , an upper link 202 , and a lower link 204 . The rear wheel seat 203 is used to mount the rear wheel 201; specifically, the axle of the rear wheel 201 is rotatably inserted into the rear wheel seat 203 . The upper link 202 extends entirely along the front-to-back direction of the vehicle frame and has a front end hinged to the shock-absorbing connection device 400 and a rear end hinged to the rear wheel seat 203 . The lower link 204 extends in the front-to-rear direction of the vehicle frame as a whole, and has a front end hinged to the shock-absorbing connecting device 400 and a rear end hinged to the rear wheel seat 203 .

[0117] As shown in Figures 13 and 14 , the upper link 202 is located above the lower link 204. The front end of the upper link 202 is hinged to the third pin 403, while the front end of the lower link 204 is hinged to the second pin 402. The upper link 202, the rear wheel seat 203, the lower link 204, and the shock-absorbing connection device 400 form a four-bar linkage. The upper link 202, the rear wheel seat 203, and the lower link 204 are respectively provided on the left and right sides of the rear wheel 201. In other words, the rear wheel 201 and the shock-absorbing connection device 400 are connected by two four-bar linkages, providing excellent connection strength, stability, and reliability.

[0118] Features of embodiments of the present disclosure are set forth in the following clauses:

[0119] Clause 1. A shock-absorbing connecting device for a vehicle frame, for connecting a front bracket, a rear bracket, and a seat bracket of the vehicle frame, the shock-absorbing connecting device comprising:

[0120] a front joint for connecting to the rear end of the front bracket;

[0121] a rear joint for connecting to the front end of the rear bracket;

[0122] a middle joint for connecting the lower end of the seat support; and

[0123] a cushioning member capable of deformation;

[0124] The front joint and the middle joint are rotatably connected via a first pin, the middle joint and the rear joint are rotatably connected via a second pin, and the front joint and the rear joint are movably connected via a third pin, and are configured to allow the front joint or the rear joint to flip up and down relative to the middle joint;

[0125] The buffer member is disposed between the middle joint and the front joint or the rear joint, so as to be deformed when the front joint or the rear joint rotates relative to the middle joint.

[0126] Item 2: The rear end of the buffer is connected to the third pin shaft. When the front joint or the rear joint is flipped up and down relative to the middle joint, the third pin shaft moves forward and backward to deform or reset the buffer member.

[0127] Item 3. The shock-absorbing connection device according to Item 2 is characterized in that the front end of the buffer member is rotatably connected to the middle joint.

[0128] Clause 4. The shock-absorbing connection device according to Clause 1 is characterized in that a front limit member is provided at the front portion of the middle joint, the front limit member has a front limit surface facing rearward, a rear limit member is provided on the front joint or the rear joint, the rear limit member has a rear limit surface facing forward, at least a portion of the front limit surface and the rear limit surface are planes, and the buffer member is confined between the front limit surface and the rear limit surface so as to deform when the front joint or the rear joint rotates relative to the middle joint.

[0129] Clause 5. The shock-absorbing connection device according to Clause 4 is characterized in that the front end of the buffer member abuts against the front limit surface, and the rear end of the buffer member abuts against the rear limit surface.

[0130] Clause 6. The shock-absorbing connection device according to Clause 5 is characterized in that, during the process of flipping the front joint or the rear joint relative to the middle joint, the front limiting surface and the rear limiting surface are parallel to each other.

[0131] Clause 7. The shock-absorbing connection device according to Clause 6, characterized in that the rear limiter is rotatably provided on the front joint via a fourth pin, and the rear joint has an abutment portion that abuts against the rear side of the rear limiter; or the rear limiter is rotatably provided on the rear joint via a fourth pin, and the front joint has an abutment portion that abuts against the rear side of the rear limiter;

[0132] The abutting portion is configured to maintain the rear limiting surface parallel to the front limiting surface.

[0133] Clause 8. The shock-absorbing connection device according to Clause 7 is characterized in that the rear limit member is suspended on the front joint through the fourth pin shaft, and the abutment portion has an arc-shaped abutment surface protruding forward. During the flipping of the front joint or the rear joint relative to the middle joint, the rear limit member and the abutment surface slide together to keep the rear limit surface vertical.

[0134] Clause 9. The shock-absorbing connection device according to Clause 4 is characterized in that an installation space is enclosed between the middle joint and the rear limit member, the buffer member is arranged in the installation space and is confined in the installation space; the buffer member is arranged along the front-to-back direction and can be deformed along the front-to-back direction; the buffer member includes a compression spring or a gas spring.

[0135] Clause 10. The shock-absorbing connection device according to Clause 4 is characterized in that the front limit member has a front limit groove, and the front end of the buffer member is located in the front limit groove; the rear limit member has a rear limit groove, and the rear end of the buffer member is located in the rear limit groove.

[0136] Clause 11. The shock-absorbing connection device according to Clause 4 is characterized in that the middle joint includes two side plates and a connecting pipe, the two side plates are arranged at intervals on the left and right, the connecting pipe is connected between the upper parts of the two side plates, and the connecting pipe is provided with a first through hole extending in the up and down directions, and the lower end portion of the seat bracket passes through the through hole; the first pin shaft is inserted into the connecting pipe and passes through the front joint, the side plate and the lower end portion of the seat bracket.

[0137] Clause 12. The shock-absorbing connection device according to any of the preceding clauses is characterized in that the lower end of the middle joint and the lower end of the rear joint are rotatably connected via the second pin shaft, the lower end of the front joint and the upper end of the rear joint are rotatably connected via the third pin shaft, and at least one of the lower end of the front joint and the upper end of the rear joint is provided with an axial hole that cooperates with the third pin shaft, and the axial hole is a waist-shaped hole or an arc-shaped hole, and the third pin shaft can be slidably inserted in the axial hole to allow the front joint and the rear joint to move relative to each other.

[0138] Clause 13. A shock-absorbing connection device according to any of the preceding clauses, characterized in that a pedal tube for mounting a pedal is provided on the rear joint, and the pedal tube is located on the rear side of the second pin shaft.

[0139] Clause 14. A shock-absorbing connection device according to any of the preceding clauses, characterized in that the rear limit member and the rear joint are fixedly connected or integrally arranged; or, the rear limit member and the front joint are fixedly connected or integrally arranged.

[0140] Item 15. A vehicle frame comprising a front frame provided with a front wheel, a rear frame provided with a rear wheel, and a seat frame provided with a seat, characterized in that the front frame, the rear frame, and the seat frame are connected by a shock-absorbing connection device as described in any one of Items 1 to 14.

[0141] Clause 16. The frame according to clause 15, wherein the rear bracket comprises:

[0142] A rear wheel seat, which is used to mount the rear wheel;

[0143] an upper link having a front end hinged to the shock-absorbing connecting device and a rear end hinged to the rear wheel seat; and

[0144] A lower connecting rod has a front end hinged to the shock absorbing connecting device and a rear end hinged to the rear wheel seat.

[0145] Clause 17. The vehicle frame according to Clause 16 is characterized in that the upper link is located above the lower link; the front end of the upper link is hinged to the third pin, and the front end of the lower link is hinged to the second pin.

[0146] Item 18. A bicycle comprising a frame, characterized in that the frame comprises the shock-absorbing connection device according to any one of Items 1 to 14 or the frame according to any one of Items 15 to 17.

[0147] Item 19. An electric bicycle comprising a frame and a battery, wherein the frame comprises a front bracket provided with a front wheel, a rear bracket provided with a rear wheel, and a seat bracket provided with a seat, and the battery is arranged on the front bracket or the rear bracket, and is characterized in that the frame further comprises a shock-absorbing connection device as described in any one of Items 1 to 14 or comprises a frame as described in any one of Items 15 to 17.

[0148] Clause 20. A shock-absorbing frame, characterized in that it comprises:

[0149] A front bracket, used for mounting the front wheel and steering assembly;

[0150] A rear bracket, the rear bracket being used to mount the rear wheel, the rear bracket being movably connected to the rear end of the front bracket via the front end thereof;

[0151] A seat bracket, the seat bracket being used to mount the seat and the elastic shock-absorbing assembly, the elastic shock-absorbing assembly being rotatably connected to the seat bracket via its front end;

[0152] The front bracket and the rear bracket are rotatably connected to the seat bracket via a first pivot and a second pivot respectively, wherein the first pivot is located above the second pivot;

[0153] At least one of the front bracket and the rear bracket is rotatably connected to the rear end of the elastic shock-absorbing assembly via a third pivot, the third pivot being located between the first pivot and the second pivot, and the front end of the elastic shock-absorbing assembly being located forward of a line connecting the first pivot and the second pivot;

[0154] The elastic shock absorbing component has an initial position and a compressed position:

[0155] When the elastic shock-absorbing assembly is located at the initial position, the front wheel and the rear wheel are not lifted, and the third pivot is located at the first position;

[0156] When the elastic shock-absorbing assembly is located at the compressed position, the front wheel and / or the rear wheel is lifted, and the third pivot moves forward from the first position to the second position.

[0157] Item 21. The shock-absorbing frame according to Item 20 is characterized in that the rear end of the front bracket is bent downward to form a first bending portion, and the front end of the rear bracket is bent upward to form a second bending portion, and the first bending portion is movably connected through its lower end and the upper end of the second bending portion.

[0158] Item 22. The shock-absorbing frame according to Item 21 is characterized in that at least one of the first bending portion and the second bending portion is rotationally connected to the rear end of the elastic shock-absorbing assembly through the third pivot.

[0159] Item 23. The shock-absorbing frame according to Item 21 is characterized in that: when the front wheel is lifted, the first bent portion rotates forward around the first pivot; when the rear wheel is lifted, the second bent portion rotates forward around the second pivot.

[0160] Item 24. The shock-absorbing frame according to Item 20 is characterized in that: the seat bracket is arranged in the up and down direction, the lower part of the seat bracket protrudes forward to form a front convex part, and the elastic shock-absorbing component is rotatably connected to the front convex part through its front end.

[0161] Item 25. The shock-absorbing frame according to Item 20 is characterized in that: among the front bracket and the rear bracket, one of them is provided with a first circular hole for the third pivot to pass through, and the other of them is provided with a first long hole for the third pivot to pass through.

[0162] Item 26. The shock-absorbing frame according to Item 20 is characterized in that: among the front bracket and the rear bracket, one of them is provided with a second circular hole for the third pivot to pass through, and the two are movably connected by a fourth pivot, one of them is provided with a third circular hole for the fourth pivot to pass through, and the other of them is provided with a second long hole for the fourth pivot to pass through.

[0163] Clause 27. The shock-absorbing frame according to Clause 20 is characterized in that the elastic expansion and contraction direction of the elastic shock-absorbing component is arranged along the front-to-rear horizontal direction.

[0164] Clause 28. The shock-absorbing frame according to Clause 27 is characterized in that: when the elastic shock-absorbing assembly is located in the initial position, the first position of the third pivot is located behind the line connecting the first pivot and the second pivot; when the elastic shock-absorbing assembly is located in the compressed position, the second position of the third pivot is located in front of the line connecting the first pivot and the second pivot.

[0165] Item 29. A bicycle comprising the shock-absorbing frame according to any one of Items 20 to 28.

[0166] The above embodiments are only for illustrating the technical concepts and features of the present disclosure. Their purpose is to enable people familiar with this technology to understand the content of the present disclosure and implement it. They are not intended to limit the scope of protection of the present disclosure. Any equivalent changes or modifications made according to the spirit of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A shock-absorbing connecting device for a frame, used to connect a front bracket, a rear bracket and a seat bracket of the frame, characterized in that: The shock absorbing connection device comprises: A front joint, which is used to connect the rear end of the front bracket; A rear joint, which is used to connect the front end of the rear bracket; a middle joint for connecting the lower end of the seat support; and a buffer member capable of deformation; The front joint and the middle joint are rotatably connected via a first pin shaft, the middle joint and the rear joint are rotatably connected via a second pin shaft, the front joint and the rear joint are movably connected via a third pin shaft, and are configured to allow the front joint or the rear joint to flip up and down relative to the middle joint; The buffer is disposed between the middle joint and the front joint or the rear joint so as to be deformed when the front joint or the rear joint rotates relative to the middle joint.

2. The shock-absorbing connection device according to claim 1, characterized in that: The rear end of the buffer is connected to the third pin shaft. When the front joint or the rear joint is turned upside down relative to the middle joint, the third pin shaft moves forward and backward to deform or reset the buffer.

3. The shock-absorbing connection device according to claim 2, characterized in that: The front end portion of the buffer is rotatably connected to the middle joint.

4. The shock-absorbing connection device according to claim 1, characterized in that: A front limit piece is provided at the front part of the middle joint, and the front limit piece has a front limit surface facing rearward. A rear limit piece is provided on the front joint or the rear joint, and the rear limit piece has a rear limit surface facing forward. At least a part of the front limit surface and the rear limit surface are planes, and the buffer is restricted between the front limit surface and the rear limit surface so as to deform when the front joint or the rear joint rotates relative to the middle joint.

5. The shock-absorbing connection device according to claim 4, characterized in that: The front end of the buffer member abuts against the front limit surface, and the rear end of the buffer member abuts against the rear limit surface.

6. The shock-absorbing connection device according to claim 5, characterized in that: During the process of the front joint or the rear joint turning over relative to the middle joint, the front limiting surface and the rear limiting surface are parallel to each other.

7. The shock-absorbing connection device according to claim 6, characterized in that: The rear limiter is rotatably arranged on the front joint via a fourth pin, and the rear joint has an abutment portion abutting against the rear side of the rear limiter; or, the rear limiter is rotatably arranged on the rear joint via a fourth pin, and the front joint has an abutment portion abutting against the rear side of the rear limiter; The abutting portion is configured to maintain the rear limiting surface parallel to the front limiting surface.

8. The shock-absorbing connection device according to claim 7, characterized in that: The rear limit member is suspended on the front joint through the fourth pin shaft, and the abutment portion has an arc-shaped abutment surface protruding forward. During the flipping of the front joint or the rear joint relative to the middle joint, the rear limit member and the abutment surface slide together to keep the rear limit surface vertical.

9. The shock-absorbing connection device according to claim 4, characterized in that: An installation space is enclosed between the middle joint and the rear limiting member, and the buffer member is arranged in the installation space and is confined in the installation space; the buffer member is arranged along the front-to-back direction and can be deformed along the front-to-back direction; the buffer member includes a compression spring or a gas spring.

10. The shock-absorbing connection device according to claim 4, characterized in that: The front limiting member has a front limiting groove, and the front end of the buffer member is located in the front limiting groove; the rear limiting member has a rear limiting groove, and the rear end of the buffer member is located in the rear limiting groove.

11. The shock-absorbing connection device according to claim 4, characterized in that: The middle joint includes two side plates and a connecting pipe, the two side plates are arranged at intervals on the left and right, the connecting pipe is connected between the upper parts of the two side plates, and the connecting pipe is provided with a first through hole extending in the up and down directions, and the lower end of the seat bracket passes through the through hole; the first pin shaft is penetrated in the connecting pipe and passes through the front joint, the side plate and the lower end of the seat bracket.

12. A shock-absorbing connection according to any preceding claim, characterised in that The lower end of the middle joint and the lower end of the rear joint are rotatably connected via the second pin shaft, the lower end of the front joint and the upper end of the rear joint are rotatably connected via the third pin shaft, and at least one of the lower end of the front joint and the upper end of the rear joint is provided with an axial hole matching the third pin shaft, the axial hole is a waist-shaped hole or an arc-shaped hole, and the third pin shaft can be slidably inserted in the axial hole to allow the front joint and the rear joint to move relative to each other.

13. A shock-absorbing connection according to any preceding claim, characterised in that The rear joint is provided with a pedal tube for mounting a pedal, and the pedal tube is located at the rear side of the second pin shaft.

14. A shock-absorbing connection according to any preceding claim, characterised in that The rear limiter and the rear joint are fixedly connected or integrally arranged; or, the rear limiter and the front joint are fixedly connected or integrally arranged.

15. A frame, comprising a front frame provided with a front wheel, a rear frame provided with a rear wheel, and a seat frame provided with a seat, characterized in that: The front support, the rear support and the seat support are connected by the shock-absorbing connection device according to any one of claims 1 to 14.

16. The frame according to claim 15, characterized in that The rear bracket comprises: A rear wheel seat, which is used to mount the rear wheel; an upper link having a front end hinged to the shock absorbing connection device and a rear end hinged to the rear wheel seat; and The lower connecting rod has a front end hinged to the shock absorbing connecting device and a rear end hinged to the rear wheel seat.

17. The frame according to claim 16, characterized in that The upper connecting rod is located above the lower connecting rod; the front end of the upper connecting rod is hinged to the third pin shaft, and the front end of the lower connecting rod is hinged to the second pin shaft.

18. A bicycle, comprising a frame, characterized in that: The frame comprises the shock-absorbing connection device according to any one of claims 1 to 14 or comprises the frame according to any one of claims 15 to 17.

19. An electric bicycle, comprising a frame and a battery, wherein the frame comprises a front bracket provided with a front wheel, a rear bracket provided with a rear wheel, and a seat bracket provided with a seat, wherein the battery is provided on the front bracket or the rear bracket, and wherein: The frame further comprises the shock absorbing connection device according to any one of claims 1 to 14 or comprises the frame according to any one of claims 15 to 17.

20. A shock-absorbing frame, characterized in that: include: A front bracket, the front bracket being used for mounting the front wheel and the steering assembly; A rear bracket, the rear bracket is used to mount the rear wheel, and the rear bracket is movably connected to the rear end of the front bracket through its front end; A seat bracket, the seat bracket is used to install a seat and an elastic shock absorbing component, and the elastic shock absorbing component is rotatably connected to the seat bracket through its front end; The front bracket and the rear bracket are rotatably connected to the seat bracket via a first pivot and a second pivot respectively, and the first pivot is located above the second pivot; At least one of the front bracket and the rear bracket is rotatably connected to the rear end of the elastic shock absorbing assembly through a third pivot, the third pivot is located between the first pivot and the second pivot, and the front end of the elastic shock absorbing assembly is located in front of the line connecting the first pivot and the second pivot; The elastic shock absorbing component has an initial position and a compressed position: When the elastic shock absorbing assembly is located at the initial position, the front wheel and the rear wheel are not lifted, and the third pivot is located at the first position; When the elastic shock absorbing assembly is located at the compressed position, the front wheel and / or the rear wheel is lifted, and the third pivot moves forward from the first position to the second position.

21. The shock-absorbing frame according to claim 20, characterized in that: The rear end of the front bracket is bent downward to form a first bending portion, and the front end of the rear bracket is bent upward to form a second bending portion. The first bending portion is movably connected to the upper end of the second bending portion through its lower end.

22. The shock-absorbing frame according to claim 21, characterized in that: At least one of the first bending portion and the second bending portion is rotatably connected to the rear end of the elastic shock absorbing assembly through the third pivot.

23. The shock-absorbing frame according to claim 21, characterized in that: When the front wheel is lifted, the first bending portion rotates forward around the first pivot; when the rear wheel is lifted, the second bending portion rotates forward around the second pivot.

24. The shock-absorbing frame according to claim 20, characterized in that: The seat support is arranged along the up-down direction, the lower part of the seat support protrudes forward to form a front convex part, and the elastic shock absorbing component is rotatably connected with the front convex part through the front end thereof.

25. The shock-absorbing frame according to claim 20, characterized in that: In both the front bracket and the rear bracket, one of them is provided with a first circular hole for the third pivot to pass through, and the other of them is provided with a first long hole for the third pivot to pass through.

26. The shock-absorbing frame according to claim 20, characterized in that: Among the front bracket and the rear bracket, one of them is provided with a second circular hole for the third pivot to pass through, and the two are movably connected by a fourth pivot, one of them is provided with a third circular hole for the fourth pivot to pass through, and the other of them is provided with a second long hole for the fourth pivot to pass through.

27. The shock-absorbing frame according to claim 20, characterized in that: The elastic expansion and contraction direction of the elastic shock-absorbing component is arranged along the front-rear horizontal direction.

28. The shock-absorbing frame according to claim 27, characterized in that: When the elastic shock absorbing assembly is located at the initial position, the first position of the third pivot is located behind the line connecting the first pivot and the second pivot; when the elastic shock absorbing assembly is located at the compressed position, the second position of the third pivot is located in front of the line connecting the first pivot and the second pivot.

29. A bicycle, characterized in that: A shock absorbing frame comprising any one of claims 20 to 28.

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