Six-link shock absorber and bicycle frame

Abstract

The present application belongs to the technical field of bicycle, and relates to a six-connecting-rod damping device and a bicycle frame. The six-connecting-rod damping device comprises a first connecting rod, a second connecting rod, a third connecting rod, a damper body, a lower fork connecting rod and an upper fork connecting rod. The front end of the first connecting rod is rotationally connected with a front triangle, and the rear end is rotationally connected with the upper fork connecting rod. The upper end of the second connecting rod is rotationally connected with the first connecting rod, and the lower end is rotationally connected with the rear upper end of the third connecting rod and the rear end of the damper body. The front end of the third connecting rod is rotationally connected with the front triangle to form a third rotation position, and the rear lower end is rotationally connected with the lower fork connecting rod to form a fourth rotation position. The front end of the damper body is rotationally connected with the front triangle. The rear end of the upper fork connecting rod is rotationally connected with the lower fork connecting rod. The beneficial effect is that, in the damping process, the lower fork connecting rod rotates around the fourth rotation position, the fourth rotation position rotates around the third rotation position, the movement track of the rear wheel axis is approximately an arc, the displacement amount in the horizontal direction is smaller, and the riding center of gravity of the rider is more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycles, in particular to a six-link shock-absorbing device and a bicycle frame. BACKGROUND

[0002] Bicycles can be divided into electric-assisted bicycles and ordinary human-powered bicycles according to the source of power, and their shock-absorbing methods are various, including front fork shock-absorbing, frame shock-absorbing, and stand pipe shock-absorbing.

[0003] The bicycle of the frame shock-absorbing type is provided with a shock absorber in the middle part of the frame, and the front and rear triangles of the frame are designed as two independent parts with a turning point, which are connected through a linkage to form a suspension structure, and the linkage and the shock absorber bear the task of buffering impact and shock-absorbing, thereby producing a shock-absorbing effect in riding.

[0004] However, in the existing shock-absorbing process of the frame shock-absorbing system, the movement of the rear triangle of the frame causes the position of the rear wheel axis to change, and the displacement of the rear wheel axis in the horizontal direction is large, which makes the center of gravity of the rider unstable, and the shock-absorbing experience is not very ideal. Therefore, it is necessary to further develop a frame shock-absorbing system with better shock-absorbing effect. SUMMARY

[0005] (I) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a six-link shock-absorbing device and a bicycle frame, which solves the technical problem that the center of gravity of the rider is unstable and the shock-absorbing effect is not very ideal in the existing shock-absorbing process of the frame shock-absorbing system.

[0007] (II) Technical solutions

[0008] In order to achieve the above-mentioned purposes, the main technical solutions adopted by the present application include:

[0009] In a first aspect, the embodiments of the present application provide a six-link shock-absorbing device, which is installed at the rear end of a front triangle of a bicycle. The six-link shock-absorbing device comprises a first link, a second link, a third link, a shock-absorbing body, a lower fork link and an upper fork link. The front end of the first link is used to be rotatably connected with the front triangle to form a first rotation position, and the rear end of the first link is rotatably connected with the upper fork link to form a second rotation position. The upper end of the second link is rotatably connected with the first link, and the lower end of the second link is rotatably connected with the rear upper end of the third link and the rear end of the shock-absorbing body to form a fifth rotation position. The front end of the third link is used to be rotatably connected with the front triangle to form a third rotation position, and the rear lower end of the third link is rotatably connected with the lower fork link to form a fourth rotation position. The front end of the shock-absorbing body is used to be rotatably connected with the front triangle to form a sixth rotation position. The rear end of the upper fork link is rotatably connected with the rear end of the lower fork link to form a seventh rotation position. The directions of the rotation axes of the first rotation position, the second rotation position, the third rotation position, the fourth rotation position, the fifth rotation position, the sixth rotation position and the seventh rotation position are the same.

[0010] Optionally, the longitudinal section of the third link is approximately triangular, the third rotation position, the fourth rotation position and the fifth rotation position correspond to the three vertices of the triangle, and the fourth rotation position is close to the third rotation position.

[0011] Optionally, the rear end of the third link is provided with a first opening, the rear end of the shock-absorbing body is arranged in the first opening, and the first opening extends along the length direction of the third link to provide a movement space for the shock-absorbing body. The lower end of the second link is provided with a receiving groove on the side opposite to the third link, and the rear upper end of the third link is arranged in the receiving groove.

[0012] Optionally, the longitudinal section of the first link is approximately triangular, the second link is rotatably connected with the rear lower end of the first link to form an eighth rotation position, and the first rotation position, the second rotation position and the eighth rotation position correspond to the three vertices of the triangle.

[0013] Optionally, the number of the first links is two, and the front ends of the first links are symmetrically arranged on the upper two sides of the rear end of the front triangle through rotation shafts. The rear end of each first link is provided with a second opening, the second opening extends along the length direction of the first link to provide an installation space for the upper fork link and the second link. The front end of the upper fork link is symmetrically provided with two first connecting heads, the first connecting heads are inserted into the second openings and are connected with the first links through rotation shafts. The upper end of the second link is symmetrically provided with two second connecting heads, the second connecting heads are inserted into the second openings and are connected with the first links through rotation shafts.

[0014] Optionally, the front end of the lower fork link is provided with two third connecting heads, the rear lower end of the third link is arranged between the two third connecting heads, and the two third connecting heads are connected together through a rotation shaft.

[0015] Secondly, embodiments of the present invention provide a bicycle frame, including the aforementioned six-link shock absorber and a front triangle, the front triangle including a top tube, a bottom tube and a stem; the front end of the first link is rotatably connected to the upper end of the stem to form a first rotating position, the front end of the shock absorber body passes through the stem and is rotatably connected to the bottom tube to form a sixth rotating position, and the front end of the third link is rotatably connected to the lower end of the stem to form a third rotating position.

[0016] Optionally, the lower end of the riser is provided with a movable window for the shock absorber body to move up and down.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this invention are as follows: The six-link shock absorber and bicycle frame of this invention consist of a first link, a second link, a third link, a shock absorber body, a lower fork link, and a upper fork link that cooperate with each other. The front end of the third link is rotatably connected to the front triangle to form a third rotation position, its lower end is rotatably connected to the lower fork link to form a fourth rotation position, and its upper end is connected to the second link and the shock absorber body to form a fifth rotation position. During shock absorption, while the lower fork link rotates around the fourth rotation position, the fourth rotation position rotates around the third rotation position, making the movement trajectory of the rear wheel axle approximately circular. Its horizontal displacement is small, making the rider's center of gravity more stable and less prone to back-and-forth swaying. This solves the technical problem that existing bicycle frame shock absorber systems suffer from unstable rider center of gravity and less than ideal shock absorption performance during shock absorption. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram (assembled state) of a six-link shock absorber and bicycle frame according to Embodiment 1 of this application;

[0020] Figure 2 for Figure 1 An enlarged view of point A in the diagram;

[0021] Figure 3 This is a second perspective view (assembled state) of a six-link shock absorber and bicycle frame according to Embodiment 1 of this application.

[0022] Figure 4 This is an exploded view of the six-link shock absorber, which is an embodiment 1 of the six-link shock absorber and bicycle frame of this application.

[0023] Figure 5 This is a longitudinal cross-sectional view (assembled state) of a six-link shock absorber and bicycle frame according to Embodiment 1 of this application;

[0024] Figure 6Figure 1 is a schematic diagram of the movement track of the rear wheel axle center of the bicycle frame of Embodiment 1 of the six-link shock-absorbing device and bicycle frame of the present application;

[0025] Figure 7 Figure 2 is a schematic diagram of the initial shock-absorbing state of the six-link shock-absorbing device of Embodiment 1 of the six-link shock-absorbing device and bicycle frame of the present application;

[0026] Figure 8 Figure 3 is a schematic diagram of the middle shock-absorbing state of the six-link shock-absorbing device of Embodiment 1 of the six-link shock-absorbing device and bicycle frame of the present application;

[0027] Figure 9 Figure 4 is a schematic diagram of the late shock-absorbing state of the six-link shock-absorbing device of Embodiment 1 of the six-link shock-absorbing device and bicycle frame of the present application;

[0028] Figure 10 Figure 5 is a parameter comparison table of each shock-absorbing stage of the six-link shock-absorbing device of Embodiment 1 of the six-link shock-absorbing device and bicycle frame of the present application.

[0029]

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 11, first link; 111, second opening; 12, second link; 13, third link; 131, first opening; 14, shock absorber body; 15, lower fork link; 16, upper fork link;

[0031] 100, rear wheel axle center; 101, first rotation position; 102, second rotation position; 103, third rotation position; 104, fourth rotation position; 105, fifth rotation position; 106, sixth rotation position; 107, seventh rotation position; 108, eighth rotation position;

[0032] 2, front triangle; 21, lower tube; 211, mounting groove; 22, vertical tube; 221, movable window. DETAILED DESCRIPTION

[0033] In order to better explain the present application and facilitate understanding, the present application is described in detail below through specific embodiments in combination with the drawings. In this article, the orientation of the terms "up", "down", and the like mentioned herein is referred to the orientation of the following tube 21 as "front", the direction of the lower fork link 15 as "rear", the direction of the vertical tube 22 as "up", and the direction of the shock absorber body 14 as "down". Figure 1

[0034] ​The six-connecting-rod damping device and the bicycle frame provided by the embodiment of the present application are installed at the rear end of the front triangle of a bicycle, and comprise a first connecting rod, a second connecting rod, a third connecting rod, a damper body, a lower fork connecting rod and an upper fork connecting rod. The front end of the first connecting rod is used to be rotationally connected with the front triangle to form a first rotation position, and the rear end of the first connecting rod is rotationally connected with the upper fork connecting rod to form a second rotation position. The upper end of the second connecting rod is rotationally connected with the first connecting rod, and the lower end of the second connecting rod is connected with the rear upper end of the third connecting rod and the rear end of the damper body through a rotating shaft to form a fifth rotation position. The front end of the third connecting rod is used to be rotationally connected with the front triangle to form a third rotation position, and the rear lower end of the third connecting rod is rotationally connected with the lower fork connecting rod to form a fourth rotation position. The front end of the damper body is used to be rotationally connected with the front triangle to form a sixth rotation position. The rear end of the upper fork connecting rod is rotationally connected with the rear end of the lower fork connecting rod to form a seventh rotation position. During the damping process, the lower fork connecting rod rotates around the fourth rotation position, and the fourth rotation position rotates around the third rotation position, so that the movement track of the rear wheel axis is approximately in the shape of an arc, the displacement amount in the horizontal direction is small, the riding gravity center of the rider is more stable, the body of the bicycle is not easy to shake, and the technical problem that the riding gravity center of the rider is unstable and the damping effect is not very ideal during the damping process of the damping system of the existing bicycle frame is solved.

[0035] In order to better understand the above technical solutions, the exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present application can be more clearly, thoroughly understood, and the scope of the present application can be completely conveyed to those skilled in the art.

[0036] Embodiment 1

[0037] With reference to Figures 1 to 3 , the present embodiment 1 provides a six-connecting-rod damping device which is installed at the rear end of the front triangle 2 of a bicycle. The six-connecting-rod damping device comprises a first connecting rod 11, a second connecting rod 12, a third connecting rod 13, a damper body 14, a lower fork connecting rod 15 and an upper fork connecting rod 16.

[0038] With reference to Figures 3 to 5 , the first connecting rod 11, the second connecting rod 12 and the third connecting rod 13 are sequentially connected from top to bottom, and the lower fork connecting rod 15 and the upper fork connecting rod 16 are rotationally connected with the front triangle 2.

[0039] Specifically, with reference to Figure 2 , Figure 4 and Figure 5, the number of the first connecting rods 11 is two. The longitudinal section shape of the first connecting rod 11 is approximately triangular, and is provided with three connecting ends corresponding to the three vertices of the triangle. The longitudinal section in the present application is a section made along the length direction of the bicycle frame. The rear end of each first connecting rod 11 is provided with a second opening 111 extending along the length direction thereof, which provides mounting space for the upper fork connecting rod 16 and the second connecting rod 12. The front ends of the two first connecting rods 11 are symmetrically mounted on the upper part of the two sides of the riser pipe 22 of the front triangle 2 through a rotating shaft, forming a first rotating position 101. The front end of the upper fork connecting rod 16 is symmetrically provided with two first connecting heads, which are inserted into the second openings 111 and connected together with the rear upper end of the first connecting rod 11 through a rotating shaft, forming a second rotating position 102. The upper end of the second connecting rod 12 is symmetrically provided with two second connecting heads, which are inserted into the second openings 111 and connected together with the rear lower end of the first connecting rod 11 through a rotating shaft, forming an eighth rotating position 108.

[0040] Referring to Figure 4 and Figure 5 , the longitudinal section shape of the third connecting rod 13 is approximately triangular, and is provided with three connecting ends corresponding to the three vertices of the triangle, and the fourth rotating position 104 is close to the third rotating position 103. The rear end of the third connecting rod 13 is provided with a first opening 131 extending along the length direction of the third connecting rod 13, which provides movement space for the up and down movement of the shock absorber body 14. The front end of the third connecting rod 13 extends to the lower part of the movable window 221 of the riser pipe 22 and is connected together with the riser pipe 22 through a rotating shaft, forming a third rotating position 103. The front end of the lower fork connecting rod 15 is provided with two third connecting heads, the rear lower end of the third connecting rod 13 is positioned between the two third connecting heads, and the two are connected together through a rotating shaft, forming a fourth rotating position 104. Under other conditions, the closer the fourth rotating position 104 is to the third rotating position 103, the smaller the displacement amount of the rear wheel axis 100 in the horizontal direction. The rear upper end of the third connecting rod 13 is connected together with the lower end of the second connecting rod 12 and the rear end of the shock absorber body 14 through a rotating shaft, forming a fifth rotating position 105. Among them, the lower end of the second connecting rod 12 is provided with a containing groove on the side opposite to the third connecting rod 13, the rear upper end of the third connecting rod 13 is positioned in the containing groove, the rear end of the shock absorber body 14 is positioned in the first opening 131 of the third connecting rod 13, and the rotating shaft connects the second connecting rod 12, the third connecting rod 13 and the shock absorber body 14 together.

[0041] The rotating shaft mentioned in the present application can be a separate round rod serving as a shaft and connected with the connecting rods on both sides, or can be a protrusion on any connecting rod serving as a rotating shaft, as long as it can allow the connecting rods on both sides to realize rotating support.

[0042] Referring to Figure 4 and Figure 5The front end of the shock absorber body 14 passes through the movable window 221 of the stand pipe 22 and is placed in the installation groove 211 of the lower pipe 21, and the lower pipe 21 is connected together through the rotating shaft, forming the sixth rotating position 106.

[0043] Referring to Figure 5 The rear end of the upper fork connecting rod 16 is connected together with the rear end of the lower fork connecting rod 15 through the rotating shaft, forming the seventh rotating position 107.

[0044] In the shock absorption process, the six connecting rod shock absorption device utilizes the force of the upper fork connecting rod 16, the first connecting rod 11, the second connecting rod 12, the third connecting rod 13, the shock absorber body 14, and the lower fork connecting rod 15 to rotate around their respective rotating positions, gradually reducing the impact force generated by the road bumps, and further offsetting the impact force due to the piston movement of the shock absorber body 14, so that the bicycle frame has better shock absorption performance and can obtain better riding experience.

[0045] Referring to Figure 5 , Figure 7 , Figure 8 and Figure 9 In the shock absorption process, in the first aspect, the upper fork connecting rod 16 moves forward under the force, pushes the first connecting rod 11 to rotate clockwise around the first rotating position 101, and pulls the third connecting rod 13 to rotate clockwise around the third rotating position 103 through the second connecting rod 12, so that the fifth rotating position 105 rotates clockwise around the third rotating position 103, pushes the shock absorber body 14 to work and rotates clockwise around the sixth rotating position 106. In the second aspect, the lower fork connecting rod 15 rotates clockwise around the fourth rotating position 104, and it needs to be emphasized again that the fourth rotating position 104 also rotates clockwise around the third rotating position 103 due to the action of other connecting rods. That is, the lower fork connecting rod 15 rotates clockwise around the fourth rotating position 104, and at the same time, the fourth rotating position 104 also rotates clockwise around the third rotating position 103.

[0046] Therefore, as Figure 6As shown, in the shock-absorbing stage, the movement track of the rear wheel axle center 100 is approximately in the shape of an arc. In this shock-absorbing process, the rear wheel axle center 100 moves upward and forward, and the movement track thereof is approximately in the shape of an arc, and the half track on the rear side of the center line Z and the half track on the front side of the center line Z. In the reset stage of the six-link shock-absorbing device, the rear wheel axle center 100 returns to the original position along the movement track. Therefore, in the entire shock-absorbing process, the displacement amount of the rear wheel axle center 100 in the horizontal direction is small, that is, the distance between the rear wheel axle center 100 and the tooth disc core shaft changes little, that is, the distance between the rear wheel axle center 100 and the pedal center changes little, the horizontal change of the riding gravity center is small, and the front and rear shaking does not occur. In the embodiment 1, the displacement amount of the rear wheel axle center 100 in the horizontal direction is 13.23 mm, and the longitudinal displacement amount is 169.49 mm, which changes according to the actual situation in the actual production and application process.

[0047] In the movement process of the six-link shock-absorbing device, the front end of the upper fork link 16 rotates clockwise around the second rotation position 102, the second rotation position 102 rotates clockwise around the first rotation position 101; the upper end of the second link 12 rotates counterclockwise around the eighth rotation position 108, the lower end of the second link 12 rotates counterclockwise around the fifth rotation position 105, the rear upper end of the third link 13 rotates clockwise around the fifth rotation position 105, and the front end of the lower fork link 15 rotates clockwise around the fourth rotation position 104; the rear end of the upper fork link 16 rotates clockwise around the seventh rotation position 107, and the rear end of the lower fork link 15 rotates clockwise around the seventh rotation position 107.

[0048] Figures 7 to 9 The process of the shock-absorbing movement of the six-link shock-absorbing device is shown. The two circular dots above the bicycle frame represent the riding gravity center in the sitting position and the riding gravity center in the squatting position from top to bottom, and the horizontal displacement amounts of the two riding gravity centers are within a very small range in the shock-absorbing process. Among them, Figure 7 The 0 mm rear stroke state of the bicycle frame is shown. The first link 11 and the third link 13 are basically in a horizontal placement state, the second link 12 is close to a vertical placement, the included angle between the second link 12 and the first link 11 and the third link 13 is close to 90 degrees, and the shock absorber body 14 is in an initial state.

[0049] Figure 8The 90mm rear travel state of the bicycle frame is shown. The upper fork link 16 is forced to move forward, pushing the first link 11 to rotate clockwise around the first rotation point 101, indirectly pulling the third link 13 to move clockwise around the third rotation point 103, and the lower fork link 15 rotates clockwise around the fourth rotation point 104. At this time, the first link 11 and the third link 13 are basically in a semi-inclined state, the height of the first rotation point 101 is lower than the height of the second rotation point 102 and the eighth rotation point 108, the height of the fifth rotation point 105 is greater than the height of the third rotation point 103, the height of the front triangle 2 is lowered, and the shock absorber body 14 is in a semi-compressed state.

[0050] Figure 9 The 170mm rear travel state of the bicycle frame is shown, which is the maximum rear travel state. The first link 11 and the third link 13 rotate clockwise to the limit position, and the first link 11 and the third link 13 are basically in an inclined state, the first rotation point 101 and the third rotation point 103 reach the lowest position, the rear wheel axis 100 moves forward and reaches the highest position. The shock absorber body 14 is in a fully compressed state. The height of the front triangle 2 is lowered to the lowest point.

[0051] As the shock absorption progresses, the position of the first rotation point 101 gradually moves downward, the third rotation point 103 gradually moves downward, the height of the front triangle 2 is greatly lowered, and the rear wheel axis 100 moves forward and upward, its movement trajectory is approximately circular, the change value of the distance between the rear wheel axis 100 and the chainring core shaft is small, and the change of the riding center of gravity is mainly in height, with little change in the horizontal direction, so the riding center of gravity is stable and does not sway forward and backward during shock absorption, the shock absorption effect is better, and the riding experience is good.

[0052] In addition, the change value of the distance between the rear wheel axis 100 and the chainring core shaft is small, which also makes the tightness of the chain or belt of the bicycle change smaller, which is more friendly to the work of the chain or belt, and the engagement degree with the chainring and the freewheel is higher, which is not easy to slip and has a longer service life.

[0053] It should be particularly pointed out that when the frame shock absorption system does not add the fourth rotation point 104, but connects the lower fork link 15 and the stand pipe 22 of the bicycle frame together, no matter how the links cooperate, the lower fork link 15 can only move in a circular motion around the third rotation point 103, resulting in a relatively large displacement of the rear wheel axis 100 in the horizontal direction, and the riding center of gravity is prone to sway forward and backward, the riding center of gravity is unstable, and the shock absorption effect is relatively poor.

[0054] It should be emphasized that the rotation points of the frame shock absorption system cannot be added at will. The more rotation points of the frame shock absorption system, the more difficult it is to produce and manufacture, and the higher the maintenance cost, which also brings certain challenges to the mechanical strength of the links.

[0055] In order to more clearly show the effect of the six-bar shock absorbing device, Figure 10 The data of the changes of various parameters in the bicycle shock absorbing process are provided. The sag is caused by the weight of the vehicle and the driver, which is the compression amount of the shock absorbing device when it is compressed by the weight of the cyclist on the bicycle. The rear travel on axle path refers to the travel of the virtual path drawn by the rear axle when the suspension is working. The progressivity refers to the ratio change between the force required for the suspension to compress to a certain travel position and the balance force generated by the impact. The shock compression refers to the compression amount of the shock absorber body 14, and the maximum shock compression refers to the maximum compression amount of the shock absorber body 14. The center of curvature is a moving point related to the axle path. For the six-bar shock absorbing device, a certain point of the non-circular axle path can be defined as the current center of curvature (CC), and the curve is considered to be circular at this point. The instant center (IC) is determined on the basis of the given travel position, and is calculated by making the two outermost connecting rods intersect each other. In addition, the ratio between the rear travel amount and the shock compression amount is the leverage ratio. The larger the leverage ratio, the greater the stress on the impact, which may result in low sensitivity of the six-bar shock absorbing device to the terrain, and vice versa, which has high sensitivity to the terrain.

[0056] Embodiment 2:

[0057] Based on embodiment 1, the bicycle frame of this embodiment 2 comprises the aforementioned six-bar shock absorbing device and the front triangle 2.

[0058] Referring to Figure 2 and Figure 4 The front triangle 2 is integrally formed and comprises a head tube, a down tube 21, a stand tube 22 and an upper tube. The lower end of the stand tube 22 is provided with a movable window 221 for the up and down movement of the shock absorber body 14, and the down tube 21 is provided with a mounting groove 211 for mounting the shock absorber body 14.

[0059] The front end of the first connecting rod 11 is rotatably connected to the upper end of the stand tube 22 to form a first rotation position 101, the front end of the shock absorber body 14 passes through the movable window 221 of the stand tube 22 and is rotatably connected to the down tube 21 to form a sixth rotation position 106, and the front end of the third connecting rod 13 is rotatably connected to the lower end of the stand tube 22 to form a third rotation position 103.

[0060] In the description of the application, it should be understood that the terms "first", "second" are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0061] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "under" and "under" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0063] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples, without contradiction.

[0064] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A six-link shock absorbing device installed at a rear end position of a front triangle (2) of a bicycle, characterized in that: The six-link shock-absorbing device comprises a first link (11), a second link (12), a third link (13), a shock-absorber body (14), a lower fork link (15) and an upper fork link (16); The front end of the first link (11) is used for being rotatably connected with the front triangle (2) to form a first rotation position (101), and the rear end thereof is rotatably connected with the upper fork link (16) to form a second rotation position (102); the upper end of the second link (12) is rotatably connected with the first link (11), and the lower end thereof is rotatably connected with the rear upper end of the third link (13) and the rear end of the shock-absorber body (14) to form a fifth rotation position (105) together; the fifth rotation position (105) is located in the rear triangle of the bicycle; the front end of the third link (13) is used for being rotatably connected with the front triangle (2) to form a third rotation position (103), and the rear lower end thereof is rotatably connected with the lower fork link (15) to form a fourth rotation position (104); the front end of the shock-absorber body (14) is used for being rotatably connected with the front triangle (2) to form a sixth rotation position (106); and the rear end of the upper fork link (16) is rotatably connected with the rear end of the lower fork link (15) to form a seventh rotation position (107); The rotation axes of the first rotation position (101), the second rotation position (102), the third rotation position (103), the fourth rotation position (104), the fifth rotation position (105), the sixth rotation position (106) and the seventh rotation position (107) are in the same direction; The three rotation positions of the third link (13) are in a triangular distribution, and the fourth rotation position (104) is close to the third rotation position (103); the lower fork link (15) rotates around the fourth rotation position (104), and the fourth rotation position (104) rotates around the third rotation position (103), so that the movement track of the driving rear wheel shaft center (100) is in a circular arc shape, thereby reducing the horizontal displacement of the rear wheel shaft center (100).

2. A six-bar linkage shock absorbing device as in claim 1, wherein: The longitudinal section shape of the third link (13) is approximately triangular, and the third rotation position (103), the fourth rotation position (104) and the fifth rotation position (105) correspond to the three vertices of the triangle.

3. A six-bar linkage shock absorber as in claim 2, wherein: The rear end of the third link (13) is provided with a first opening (131), the rear end of the shock-absorber body (14) is arranged in the first opening (131), and the first opening (131) extends along the length direction of the third link (13) to provide a movement space for the shock-absorber body (14); The lower end of the second link (12) is provided with a containing groove on the side opposite to the third link (13), and the rear upper end of the third link (13) is arranged in the containing groove.

4. A six-bar linkage shock absorber as in claim 1, wherein: The longitudinal section shape of the first link (11) is approximately triangular, the second link (12) is rotatably connected with the rear lower end of the first link (11) to form an eighth rotation position (108), and the first rotation position (101), the second rotation position (102) and the eighth rotation position (108) correspond to the three vertices of the triangle.

5. A six-bar linkage shock absorber as in claim 4, wherein: The number of the first connecting rods (11) is two, and the front ends thereof are symmetrically installed on the upper two sides of the rear end of the front triangle (2) through rotating shafts, and the rear end of each first connecting rod (11) is provided with a second opening (111) extending along the length direction thereof, which provides mounting space for the upper fork connecting rod (16) and the second connecting rod (12); The front end of the upper fork connecting rod (16) is symmetrically provided with two first connecting heads, which are inserted into the second openings (111) and connected with the first connecting rods (11) through rotating shafts, and the upper end of the second connecting rod (12) is symmetrically provided with two second connecting heads, which are inserted into the second openings (111) and connected with the first connecting rods (11) through rotating shafts.

6. A six-bar linkage shock absorber as in claim 1, wherein: The front end of the lower fork connecting rod (15) is provided with two third connecting heads, and the rear lower end of the third connecting rod (13) is arranged between the two third connecting heads and connected therewith through a rotating shaft.

7. A bicycle frame characterised in that: The six-connecting-rod damping device comprises the six-connecting-rod damping device and a front triangle (2), and the front triangle (2) comprises an upper pipe, a lower pipe (21) and a vertical pipe (22). The front end of the first connecting rod (11) is rotatably connected with the upper end of the vertical pipe (22) to form a first rotating position (101), the front end of the damper body (14) passes through the vertical pipe (22) and is rotatably connected with the lower pipe (21) to form a sixth rotating position (106), and the front end of the third connecting rod (13) is rotatably connected with the lower end of the vertical pipe (22) to form a third rotating position (103).

8. A bicycle frame as claimed in claim 7, characterised in that: The lower end of the vertical pipe (22) is provided with a movable window (221) for the damper body (14) to move up and down.

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