Rear suspension system

Abstract

The invention discloses a rear suspension system which comprises a vehicle body, a first connecting rod, a second connecting rod, a rear wheel frame, a damping bush assembly and a reset piece, the damping bush assembly is installed on the vehicle body, one end of the first connecting rod is hinged to the damping bush assembly, and the other end of the first connecting rod is hinged to one end of the second connecting rod; the other end of the second connecting rod is hinged to the first connecting end of the rear wheel frame, the second connecting end of the rear wheel frame is hinged to the bicycle body, the reset piece is arranged at at least one connecting position, and the connecting positions comprise the hinged position of the first connecting rod and the damping bush assembly, the hinged position of the first connecting rod and the second connecting rod and the hinged position of the second connecting rod and the rear wheel frame. The rear wheel frame is hinged to the bicycle body. The rear suspension system is compact in structure and light in weight, and the riding experience of a user is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle architecture, and in particular to a rear suspension system. Background Art

[0002] The existing soft-tail bicycles on the market, whether they are single-pivot soft-tail structures or multi-link soft-tail structures, need to be equipped with a rear shock absorber to achieve the effects of shock absorption and damping. Various link structures plus a shock absorber will make the structure of the soft-tail vehicle complicated and increase the weight, so it is necessary to reconstruct the soft-tail structure. Summary of the invention

[0003] In view of this, the present invention provides a rear suspension system for solving the problem that the soft-tail vehicle in the prior art occupies space and increases weight due to the existence of a rear shock absorber.

[0004] To achieve one or part or all of the above purposes or other purposes, the present invention provides a rear suspension system, including a vehicle body, a first link, a second link, a rear wheel frame, a damping bushing assembly and a reset member.

[0005] The damping bushing assembly is mounted on the vehicle body, one end of the first connecting rod is hinged to the damping bushing assembly, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to the first connecting end of the rear wheel frame, and the second connecting end of the rear wheel frame is hinged to the vehicle body.

[0006] The reset member is disposed at at least one connection position, the connection position including a hinge between the first connecting rod and the damping bushing assembly, a hinge between the first connecting rod and the second connecting rod, a hinge between the second connecting rod and the rear wheel frame, and a hinge between the rear wheel frame and the vehicle body;

[0007] When the rear suspension system vibrates, the first link, the second link and the rear wheel frame change from the first suspension position to the second suspension position, and then return to the first suspension position from the second suspension position. The damping bushing assembly is used to provide the rear suspension system with a first damping force changing from the first suspension position to the second suspension position, and a second damping force changing from the second suspension position to the first suspension position. The return member is used to provide the rear suspension system with a return force returning from the second suspension position to the first suspension position.

[0008] Furthermore, the number of the first connecting rod, the second connecting rod and the rear wheel frame is two each, and a group of the first connecting rod, the second connecting rod and the rear wheel frame are symmetrically arranged on both sides of the vehicle body, the two first connecting rods are respectively hinged to the two sides of the damping bushing assembly, and the second connecting ends of the two rear wheel frames are respectively hinged to the two sides of the vehicle body.

[0009] Furthermore, a first connecting shaft is arranged between the first connecting ends of the two rear wheel frames, and two ends of the first connecting shaft are respectively hinged to the first connecting ends of the two rear wheel frames.

[0010] Furthermore, the rear wheel frame includes a third connecting rod and a rear fork, the rear fork is a V-shaped structure, the two ends of the V-shaped structure are respectively connected to the two ends of the third connecting rod, and the first connecting end of the rear wheel frame and the second connecting end of the rear wheel frame are respectively arranged at the two ends of the third connecting rod and on the side opposite to the rear fork.

[0011] Furthermore, the reset member includes a spring body and two clamping feet extending along the outermost spring of the spring body, the two clamping feet are arranged on both sides of the spring body and are arranged opposite to each other, the first connecting rod is provided with a first clamping groove, and the second connecting rod is provided with a second clamping groove, the spring body is sleeved at the hinge of the first connecting rod and the second connecting rod, and the two clamping feet are respectively inserted into the first clamping groove and the second clamping groove.

[0012] Furthermore, the damping bushing assembly includes a lever arm housing, a damping assembly and a rotating assembly.

[0013] An oil groove is provided on the outer side wall of the rotating assembly, and the oil groove is provided along the circumference of the rotating assembly, and the two ends of the oil groove are not connected, and the rotating assembly is sleeved in the internal accommodation space of the lever arm housing;

[0014] The damping assembly includes a damping adjustment member and a damping stopper needle, the damping adjustment member is provided with a through hole, the damping adjustment member penetrates from the lever arm housing and abuts against the rotating assembly, and the through hole is located in the oil groove, the through hole is communicated with the oil groove, and the damping adjustment member divides the oil groove into a first oil groove and a second oil groove; the damping stopper needle is arranged on the center line of the through hole, and the damping stopper needle can move up and down along the center line;

[0015] When the damping stop needle moves to a preset position, the damping stop needle blocks the through hole, and the first oil groove and the second oil groove are no longer connected; when the damping stop needle leaves the preset position, the first oil groove and the second oil groove are connected through the through hole.

[0016] Furthermore, the damping adjustment member includes an adjustment valve body, an adjustment sheet and a spring.

[0017] The regulating valve body is a hollow structure, and includes an upper end face and a lower end face opposite to each other, and a first side end face and a second side end face opposite to each other, the upper end face is provided with a first through hole, the lower end face is provided with a second through hole, and the first side end face penetrates into the lever arm housing and abuts against the rotating assembly;

[0018] The regulating plate is provided with a third through hole, the regulating plate is arranged in the regulating valve body, and the third through hole is located on the passage from the first through hole to the second through hole, and the first through hole, the second through hole and the third through hole constitute the through hole;

[0019] The spring is arranged in the regulating valve body and abuts against the bottom of the regulating sheet.

[0020] Furthermore, the damping needle includes a cylindrical needle body and a conical needle tip portion which are connected to each other; when the damping needle blocks the through hole, the conical needle tip portion is inserted from the first through hole to block the third through hole.

[0021] Furthermore, a boss portion is also provided on the outer periphery of the cylindrical needle stopper body, and when the damping needle stops the through hole, the boss portion stops the first through hole.

[0022] Furthermore, the damping stop needle penetrates through an oil chamber opened on the lever arm housing, the tail of the damping stop needle is located in the oil chamber, and the oil chamber port is connected to the oil inlet pipeline assembly.

[0023] Implementing the embodiments of the present invention will have the following beneficial effects:

[0024] The rear suspension system of this embodiment realizes a lightweight design of the rear suspension system by adding a first link and a second link to the original vehicle body structure and cooperating with a damping bushing assembly and a reset member. The rear suspension system has a compact structure and occupies little space, thereby greatly improving the user's riding experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] in:

[0027] Figure 1 is a schematic structural diagram of a rear suspension system in one embodiment;

[0028] Figure 2 is a schematic diagram of an exploded structure of a rear suspension system in one embodiment;

[0029] Figure 3 is a schematic structural diagram of a rear wheel frame in one embodiment;

[0030] Figure 4 is a schematic diagram of an exploded structure of a connection between a first connecting rod and a second connecting rod in one embodiment;

[0031] Figure 5 is a schematic structural diagram of a damping bushing assembly in one embodiment;

[0032] Figure 6 is a schematic diagram of an exploded structure of a damping bushing assembly in one embodiment;

[0033] Figure 7 A schematic diagram of an explosion structure of a damping adjustment member in one embodiment;

[0034] Figure 8 It is a schematic diagram of the structure of a damping needle stopper in one embodiment;

[0035] Fig. 9 is a schematic cross-sectional structure diagram of a damping bushing assembly in one embodiment;

[0036] Fig.10 Schematic diagram of the structure of the first connecting rod in one embodiment.

[0037] Description of the accompanying drawings:

[0038] 1: lever arm housing; 101: oil chamber; 102: connecting fin;

[0039] 2: damping assembly; 21: damping adjustment member; 211: through hole; 212: regulating valve body; 2121: first through hole; 2122: second through hole; 2123: valve hole; 2124: valve cover; 213: adjustment sheet; 2131: third through hole; 214: spring; 22: damping needle stopper; 221: cylindrical needle stopper body; 222: conical needle tip; 223: boss portion;

[0040] 3: Rotating assembly; 31: Oil groove; 311: First oil groove; 312: Second oil groove; 32: Four corner holes; 33: Sealing groove;

[0041] 4: second connecting shaft; 5: first connecting rod; 51: four-corner connecting bolt; 52: first slot; 6: second connecting rod; 61: second slot; 7: rear wheel frame; 701: rear fork; 702: third connecting rod; 703: first connecting end; 704: second connecting end; 705: first connecting shaft;

[0042] 8: vehicle body; 9: reset member; 91: spring body; 92: clamping foot; 10: damping bushing assembly; 11: sealing ring; 12: bolt;

[0043] 13: oil inlet pipeline assembly; 131: first screw rod; 132: connecting sleeve; 133: second screw rod; 134: oil inlet pipeline. DETAILED DESCRIPTION

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0047] Reference Figure 1 and Figure 2 The embodiment of the present invention shows a rear suspension system, including a vehicle body 8, a first link 5, a second link 6, a rear wheel frame 7, a damping bushing assembly 10 and a reset member 9,

[0048] The damping bushing assembly 10 is mounted on the vehicle body 8, one end of the first connecting rod 5 is hinged to the damping bushing assembly 10, the other end of the first connecting rod 5 is hinged to one end of the second connecting rod 6, the other end of the second connecting rod 6 is hinged to the first connecting end 703 of the rear wheel frame 7, and the second connecting end 704 of the rear wheel frame 7 is hinged to the vehicle body 8.

[0049] The reset member 9 is disposed at at least one connection position, including a hinge between the first connecting rod 5 and the damping bushing assembly 10, a hinge between the first connecting rod 5 and the second connecting rod 6, a hinge between the second connecting rod 6 and the rear wheel frame 7, and a hinge between the rear wheel frame 7 and the vehicle body 8;

[0050] When the rear suspension system vibrates, the first link 5, the second link 6 and the rear wheel frame 7 change from the first suspension position to the second suspension position, and then reset from the second suspension position to the first suspension position. The damping bushing assembly 10 is used to provide the rear suspension system with a first damping force changing from the first suspension position to the second suspension position, and a second damping force changing from the second suspension position to the first suspension position. The reset member 9 is used to provide the rear suspension system with a reset force restoring from the second suspension position to the first suspension position.

[0051] In this embodiment, a plurality of connecting fins 102 are provided on the damping bushing assembly 10 , and the connecting fins 102 are fixedly mounted on the vehicle body 8 by fasteners such as bolts and nuts.

[0052] The first suspension position is the initial position when the vehicle body is in a stable state. When the rear suspension system vibrates (for example, encounters bumps, road stones, etc.), the rear wheel is lifted up, and the rear wheel frame 7 rotates clockwise at a certain angle with the second connection end 704 as the rotation center, so that the first connection end 703 of the rear wheel frame 7 pushes the second connecting rod 6 to move forward, and then the second connecting rod 6 pushes the other end of the first connecting rod 5 (i.e., the connection end with the second connecting rod 6) to rotate clockwise, driving one end of the first connecting rod 5 (i.e., the connection end with the damping bushing assembly 10) to rotate clockwise at a certain angle. The clockwise rotation of the first end of the first connecting rod 5 drives the damping bushing assembly 10 to provide the first damping force, so that the rear suspension system can be quickly deformed to the second suspension position, so that the rear wheel can be quickly adjusted to a height suitable for the road conditions.

[0053] When the road surface is no longer bumpy, under the action of the reset force of the reset member 9, the rear suspension system resets from the second suspension position to the first suspension position, and the counterclockwise rotation of the first connecting rod 5 pushes the second connecting rod 6 to move backward, thereby driving the rear wheel frame 7 to rotate counterclockwise and return to its original position. During this process, the damping bushing assembly 10 provides a second damping force, which is greater than the first damping force, thereby causing the rear wheel to slowly reset.

[0054] The rear suspension system of this embodiment realizes a lightweight design of the rear suspension system by adding a first link 5 and a second link 6 to the original vehicle body structure, and cooperating with a damping bushing assembly 10 and a reset member 9. The rear suspension system has a compact structure and occupies little space, thereby greatly improving the user's riding experience.

[0055] Reference Figure 1 and Figure 2 In a specific embodiment, the number of the first connecting rod 5, the second connecting rod 6 and the rear wheel frame 7 is two, and a group of the first connecting rod 5, the second connecting rod 6 and the rear wheel frame 7 are symmetrically arranged on both sides of the vehicle body 8. The two first connecting rods 5 are respectively hinged to the two sides of the damping bushing assembly 10, and the second connecting ends 704 of the two rear wheel frames 7 are respectively hinged to the two sides of the vehicle body 8.

[0056] Among them, a first connecting shaft 705 is set between the first connecting ends 703 of the two rear wheel frames 7, and the two ends of the first connecting shaft 705 are respectively hinged to the first connecting ends 703 of the two rear wheel frames 7, so as to fix the lateral positions of the rear wheel frames 7 on both sides of the vehicle body 8, thereby improving the synchronization effect of the angular rotation of the rear wheel frames 7 on both sides when the rear wheels vibrate.

[0057] A second connecting shaft 4 is arranged between the two first connecting rods 5. The second connecting shaft 4 passes through the damping bushing assembly 10. The two first connecting rods 5 are respectively inserted into the two ends of the damping bushing assembly 10. Then the second connecting shaft 4 is inserted into the damping bushing assembly 10 from the first connecting rod 5 on one side. The other end of the second connecting shaft 4 passes through the first connecting rod 5 on the other side and is locked with fasteners to realize the assembly of the first connecting rods 5 on both sides of the damping bushing assembly 10. The lateral positions of the first connecting rods 5 on both sides of the vehicle body 8 are fixed, thereby improving the synchronization effect of the angular rotation of the first connecting rods 5 on both sides when the rear wheels vibrate.

[0058] Reference Figure 3 In a specific embodiment, the rear wheel frame 7 includes a third connecting rod 702 and a rear fork 703. The rear fork 703 is a V-shaped structure. The two ends of the V-shaped structure are respectively connected to the two ends of the third connecting rod 702. The first connecting end 703 and the second connecting end 704 of the rear wheel frame 7 are respectively arranged at the two ends of the third connecting rod 702 and on the side opposite to the rear fork 703. The rear fork 703 is connected to the wheel. The third connecting rod 702 connects the two ends of the V-shaped structure of the rear fork 703 to form a triangular structure. When the rear wheel vibrates, the position of the rear fork 703 is driven to change, thereby driving the angle of the third connecting rod 702 to change. The first connecting end 703 and the second connecting end 704 are located on the same side of the third connecting rod 702, and the rear fork is located on the other side of the third connecting rod 702.

[0059] Reference Figure 4 In a specific embodiment, the reset member 9 is arranged at the hinge of the first connecting rod 5 and the second connecting rod 6. The reset member 9 includes a spring body 91 and two clamping feet 92 extending from the outermost spring of the spring body 91. The two clamping feet 92 are arranged on both sides of the spring body 91 and are arranged opposite to each other. The first connecting rod 5 is provided with a first clamping groove 52, and the second connecting rod 6 is provided with a second clamping groove 61. The spring body 91 is sleeved at the hinge of the first connecting rod 5 and the second connecting rod 6, and the two clamping feet 92 are respectively inserted into the first clamping groove 52 and the second clamping groove 61.

[0060] The reset member 9 is used to provide a reset driving force. When the angle between the first connecting rod 5 and the second connecting rod 6 changes due to external force, the reset member 9 is deformed, and the two clamping feet 92 are pressed or pulled apart. Then, the reset member 9 generates a reset force to resist the deformation. The reset force is used to drive the first connecting rod 5 and the second connecting rod 6 to return to the angle in a stable state through the two clamping feet 92.

[0061] In some other specific embodiments of the present invention, the reset member 9 may be provided at the hinge between the first connecting rod 5 and the damping bushing assembly 10, or at the hinge between the second connecting rod 6 and the rear wheel frame 7, or at the hinge between the rear wheel frame 7 and the vehicle body 8. The specific connection structure of the reset member 9 may refer to the above embodiment, except that the slot for clamping the clamping foot is provided on another component, which will not be described in detail in the present invention.

[0062] In some other specific embodiments of the present invention, the reset member 9 can be arranged at multiple connection points including the hinge between the first connecting rod 5 and the damping bushing assembly 10, the hinge between the first connecting rod 5 and the second connecting rod 6, the hinge between the second connecting rod 6 and the rear wheel frame 7, and the hinge between the rear wheel frame 7 and the vehicle body 8.

[0063] Reference Figure 5 and Figure 6 , the damping bushing assembly 10 includes a lever arm housing 1, a damping assembly 2 and a rotating assembly 3;

[0064] An oil groove 31 is provided on the outer wall of the rotating assembly 3. The oil groove 31 is provided along the circumference of the rotating assembly 3. The two ends of the oil groove 31 are not connected. The rotating assembly 3 is sleeved in the internal accommodation space of the lever arm housing 1.

[0065] The damping assembly 2 includes a damping adjustment member 21 and a damping stopper needle 22. The damping adjustment member 21 is provided with a through hole 211. The damping adjustment member 21 penetrates from the lever arm housing 1 and abuts against the rotating assembly 3. The through hole 211 is located in the oil groove 31. The through hole 211 is connected with the oil groove 31. The damping adjustment member 21 divides the oil groove 31 into a first oil groove 311 and a second oil groove 312. The damping stopper needle 22 is arranged on the center line of the through hole 211, and the damping stopper needle 22 can move up and down along the center line.

[0066] When the damping stopper needle 22 moves to the preset position, the damping stopper needle 22 blocks the through hole 211 , and the first oil groove 311 and the second oil groove 312 are no longer connected; when the damping stopper needle 22 leaves the preset position, the first oil groove 311 and the second oil groove 312 are connected through the through hole 211 .

[0067] In this embodiment, the lever arm housing 1 is used to accommodate the various component structures of the damping bushing assembly 10, and together with the various component structures installed therein, form an oil storage space, which is used to accommodate the viscous liquid (such as brake oil) acting on the damping bushing assembly 10. The openings on the lever arm housing 1 should be sealed in a suitable manner (such as a sealing rubber ring, etc.) to prevent leakage of the viscous liquid.

[0068] Holes are respectively opened on the two side surfaces of the lever arm housing 1 to form a channel penetrating in the horizontal direction, which is used to insert the rotating assembly 3 into the channel. The outer wall of the rotating assembly 3 (the side wall of the protruding part relative to the oil groove 31) fits with the inner wall of the lever arm housing 1, so that the viscous liquid in the oil groove 31 is sealed in the oil storage space in the lever arm housing 1. The rotating assembly 3 can rotate relative to the lever arm housing 1. In one embodiment, the outer wall of the rotating assembly 3 is respectively provided with sealing grooves 33 on both sides of the oil groove 31, and a sealing ring 11 is provided in the sealing groove 33. Thereby, leakage of the viscous liquid in the oil groove 31 is prevented.

[0069] The end of the damping adjustment member 21 is adapted to the structure of the oil groove so that when the two are against each other, there is no or very small gap between the end of the damping adjustment member 21 and the oil groove. The rotating component 3 can rotate relative to the end of the damping adjustment member 21. When the rotating component 3 rotates, the viscous liquid in the oil groove 31 is driven to rotate. Depending on the rotation direction of the rotating component 3, the viscous liquid flows from the first oil groove 311 to the second oil groove 312 through the through hole 211, or flows from the second oil groove 312 to the first oil groove 311 through the through hole 211. When the damping stopper needle 22 blocks the through hole 211, the first oil groove 311 and the second oil groove 312 are no longer connected. At this time, the flow of the viscous liquid in the oil groove 31 is severely hindered, thereby generating a large damping force. When the damping stopper needle 22 leaves the preset position, the through hole 211 re-connects the first oil groove 311 and the second oil groove 312, so that the viscous liquid can flow smoothly and the damping force is reduced accordingly.

[0070] The above-mentioned preset position is the position where the damping stopper needle 22 blocks the through hole 211. For damping bushing assemblies 10 of different specifications, the preset position may be different, and the preset position can be determined during the debugging stage. It is understandable that when the damping stopper needle 22 leaves the preset position, there are also partial blocking and no blocking at all. Therefore, in actual use, the blocking degree of the through hole can be adjusted by adjusting the position of the damping stopper needle 22 (the blocking degree can be any value from 0 to 1), thereby adjusting the magnitude of the damping force.

[0071] By adopting the damping bushing assembly 10 of this embodiment, the opening of the through hole 211 (i.e., the ratio of the area through which the viscous liquid passes to the area of ​​the through hole) can be adjusted by adjusting the relative position of the damping stop pin 22 and the through hole 211, thereby adjusting the size of the damping force to adapt to different road conditions and the needs of different users and improve the riding experience.

[0072] Reference Figure 7 In one embodiment, the damping adjustment member 21 includes a regulating valve body 212, an adjusting plate 213 and a spring 214. The regulating valve body 212 is a hollow structure. The regulating valve body 212 includes relative upper and lower end faces, and relative first and second side end faces. The upper end face has a first through hole 2121, and the lower end face has a second through hole 2122. The first side end face penetrates into the lever arm housing 1 and abuts against the rotating component 3; the adjusting plate 213 has a third through hole 2131. The adjusting plate 213 is arranged in the regulating valve body 212, and the third through hole 2131 is located on the passage from the first through hole 2121 to the second through hole 2122. The first through hole 2121, the second through hole 2122 and the third through hole 2131 constitute a through hole 211; the spring 214 is arranged in the regulating valve body 212 and abuts against the bottom of the regulating plate 213.

[0073] In this embodiment, the spring 214 is disposed against the bottom of the regulating piece 213, providing an upward thrust to the regulating piece 213. The regulating piece 213 moves up and down in the regulating valve body 212 by compressing or stretching the spring 214 under the action of an external force. The sizes of the first through hole 2121, the second through hole 2122 and the third through hole 2131 can be equal or unequal. The side surface of the first end is tightly against the rotating component 3. When the rotating component 3 rotates, the position of the regulating valve body 212 is fixed and does not rotate therewith, and the regulating piece 213 therein is movable.

[0074] Specifically, when the rotating assembly 3 rotates clockwise, the oil in the second oil groove 312 is pushed to flow into the first oil groove 311. When the oil flows to the regulating plate 213, a downward thrust is generated on the regulating plate 213. The downward thrust is greater than the upward thrust of the spring, and the spring 214 is compressed downward, thereby increasing the distance between the damping needle 22 and the regulating plate 213. In the initial state (before the rotating assembly 3 rotates), when the damping needle 22 completely blocks or partially blocks the third through hole 213, the downward thrust can increase the opening of the regulating plate 213 (i.e., the ratio of the area through which the viscous liquid passes to the area of ​​the third through hole), so that the oil in the second oil groove 312 is accelerated to pass through the third through hole 213, thereby reducing the damping force.

[0075] When the rotating component 3 rotates counterclockwise, the oil in the first oil groove 311 is pushed to flow into the second oil groove 312. When it flows to the adjusting plate 213, it generates an upward push on the adjusting plate. Combined with the upward thrust of the spring, the sum of the thrusts pushes the adjusting plate 213 upward. In some cases, it finally reaches the upper end surface of the inner side of the regulating valve body. The distance between the damping needle 22 and the adjusting plate is reduced, and the opening of the third through hole 213 is reduced, so that the resistance of the oil in the first oil groove 311 passing through the third through hole 213 is increased, that is, the damping force is increased.

[0076] This embodiment achieves flexible adjustment of the damping force during use by adjusting the positions of the adjustment sheet 213 and the damping stop needle 22 .

[0077] Reference Figure 8 In one embodiment, the third through hole 2131 has a first opening and a second opening relative to each other, the first opening is located on a side close to the insertion direction of the damping needle, the diameter of the first opening is smaller than the diameter of the second opening, the spring 214 is installed at the second opening, and the diameter of the spring 214 is smaller than the diameter of the first opening, so that a stable connection can be achieved with the adjusting plate 213.

[0078] Reference Figure 8 In one embodiment, the damping needle stopper 22 includes a cylindrical needle stopper body 221 and a conical needle tip portion 222 that are connected to each other; when the damping needle stopper 22 blocks the through hole 211, the conical needle tip portion 222 is inserted from the first through hole 2121 to block the third through hole 2122.

[0079] In this embodiment, when the damping needle 22 moves up and down to adjust the opening of the through hole 211, the tapered needle tip 222 blocks the through hole. As the tapered needle tip 222 is inserted deeper into the third through hole 2122, the opening of the third through hole 2122 becomes smaller, and the damping force of the damping bushing assembly 10 becomes greater. The design of the tapered structure also enables the opening of the third through hole 2122 to be theoretically any opening between 0 and 1, thereby achieving flexible adjustment of the damping force.

[0080] Reference Figure 8 In one embodiment, a boss portion 223 is further provided on the outer periphery of the cylindrical needle stopper body 221 , and when the damping needle stopper 22 blocks the through hole 211 , the boss portion 223 blocks the first through hole 2121 .

[0081] In this embodiment, the through hole 211 is completely blocked by further providing a boss portion 223. In some cases, the conical needle tip portion 222 may not completely block the third through hole 2122, or even after blocking the third through hole 2122, the viscous liquid may still flow into the regulating valve body 212 from the gap between the first through hole 2121 and the cylindrical needle stopper body 221, and then flow out through the gap of the regulating valve body 212. The boss portion 223 completely blocks the first through hole 2121, thereby completely blocking the viscous liquid and achieving the maximum damping force.

[0082] Reference Figure 7 In one embodiment, a valve hole 2123 is formed on the second side end surface of the regulating valve body 212 , the valve hole 2123 is closed by a valve cover 2124 , and the regulating piece 213 is placed into the regulating valve body 212 through the valve hole 2123 .

[0083] In this embodiment, the valve cover 2124 is mounted on the valve hole 2123 by means of bolts 12, and a sealing ring 11 is arranged between the valve hole 2123 and the valve cover 2124 to prevent leakage of viscous liquid. The adjusting plate 213 and the spring 214 are both put into the regulating valve body 212 through the valve hole 2123, and then the bottom of the spring 214 is fixed (for example, by welding, gluing, etc.) on the inner bottom surface of the regulating valve 212 to complete the assembly of the damping adjusting member.

[0084] Reference Figure 7 In one embodiment, the damping needle 22 penetrates through the oil chamber 101 opened on the lever arm housing 1, the tail of the damping needle 22 is located in the oil chamber 101, and the oil chamber port is connected to the oil inlet pipeline assembly 13.

[0085] In this embodiment, the upper part of the damping stopper needle 22 is tightly fitted with the inner wall of the oil chamber 101, and a plurality of sealing grooves are provided on the upper part of the damping stopper needle 22. The sealing grooves are provided with sealing rings 11, and the damping stopper needle 22 can move up and down relative to the oil chamber 101. The oil chamber 101 and the oil inlet pipeline assembly 13 are filled with viscous liquid, and the oil inlet pipeline assembly 13 is used to fill the viscous liquid from the oil chamber mouth into the upper half of the oil chamber 101. Since the tail of the damping stopper needle 22 blocks the oil chamber, the oil in the oil inlet pipeline assembly 13 cannot enter the internal accommodation space of the lever arm housing 1, but generates a downward driving force on the tail of the damping stopper needle 22. The damping stopper needle 22 moves downward under the action of the driving force to reduce the opening of the through hole 211 and increase the damping force of the overall system of the damping bushing assembly 10.

[0086] The oil inlet pipeline assembly 13 includes a first screw 131, a connecting sleeve 132 and a second screw 133. The connecting sleeve 132 is sleeved outside the first screw 131. The lower half of the first screw 131 is inserted into the oil cavity 101 from the oil cavity opening to block the oil cavity opening. One end of the connecting sleeve 132 is connected to the oil inlet pipeline 134, and the other end of the connecting sleeve 132 is blocked by being installed in the second screw 133. The connecting sleeve 132 and the first screw 131 are both hollow structures. The viscous liquid filled in the oil inlet pipeline 134 enters the hollow pipe of the first screw 131 through the hollow pipe of the connecting sleeve 132 and then enters the oil cavity 101 to push the damping needle 22 to move downward. The filling of the viscous liquid in the oil inlet pipeline 134 is controlled by the damping control knob of the bicycle, etc., and the oil control device in the prior art can be used, or other designs can be used to push the viscous liquid to flow back and forth. The present invention does not elaborate on this structure in detail.

[0087] Reference Figure 1 , Fig. 9 and Fig.10 A four-corner hole 32 is set in the rotating component 3, and a corresponding four-corner connecting bolt 51 is set on the side of the head end of the first connecting rod 5. The four-corner connecting bolts 51 of the two first connecting rods 5 are respectively inserted into the two ends of the four-corner hole 32, and then the second connecting shaft 4 is passed through the four-corner hole 32 from the first connecting rod 5 on one side, and the other end of the second connecting shaft 4 passes through the first connecting rod 5 on the other side, and is locked with fasteners, thereby realizing the assembly of the first connecting rods 5 on both sides of the rotating component 3.

[0088] Before riding, the user can adjust the shock knob according to experience and estimated road conditions, apply appropriate pressure to the damping needle 22 through the oil inlet pipeline assembly 13, and the damping needle 22 moves to the appropriate position to completely block or partially block the through hole 211 (depending on the actual use situation). During riding, when encountering bumpy road conditions, the rear wheel vibrates, such as lifting upward, and the rear fork 701 drives the third connecting rod 703 to rotate clockwise along the first end 703 of the rear wheel frame 7, thereby pushing the second connecting rod 6 to move forward, and then the second connecting rod 6 compresses the two clamping feet 92 of the reset member 9 and pushes the first connecting rod 5 to rotate clockwise. The first connecting rod 5 drives the rotating assembly 3 to rotate clockwise, and the oil in the second oil groove 312 flows to the first oil groove 311, pushing the adjustment plate 213 to move downward, reducing the blocked area of ​​the through hole 211, increasing the opening of the through hole 211 (that is, the flowable area of ​​the viscous liquid increases), reducing the damping force, and facilitating the rear wheel to quickly adapt to the position adjustment of the road conditions. When the road surface is no longer bumpy, under the action of the restoring force of the restoring member 9, the other end of the first connecting rod 5 (i.e., the end hinged to the second connecting rod 6) returns to its original position backward, driving one end of the first connecting rod 5 (i.e., the end hinged to the damping bushing assembly 10) to rotate counterclockwise, and the oil in the first oil groove 311 flows into the second oil groove 312, pushing the adjusting plate 213 to move upward, reducing the opening of the through hole 211, and increasing the damping force, so that the counterclockwise rotation return speed of the first connecting rod 5 is slowed down, and then the return speed of other connecting rods is also slowed down accordingly, and the rear wheel slowly returns to its original position. For the user, the vibration feeling is greatly reduced, and the riding comfort and user experience are improved.

[0089] The rear suspension system provided in the embodiment of the present invention, by adding a first connecting rod 5 and a second connecting rod 6 to the original vehicle body structure, and cooperating with a damping bushing assembly 10 and a reset member 9, by adjusting the relative position of the damping stop pin 22 in the damping bushing assembly 10 and the through hole 211, and then adjusting the opening of the through hole 211 (that is, the ratio of the area through which the viscous liquid passes to the area of ​​the through hole), can adaptively match different damping forces during the bouncing and returning of the wheel during riding, so as to flexibly adapt to different road conditions and the needs of different users. The overall structure of the rear suspension system is compact, light and easy to operate, which greatly improves the user's riding experience.

[0090] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A rear suspension system, characterized in that: It includes a vehicle body, a first connecting rod, a second connecting rod, a rear wheel frame, a damping bushing assembly and a reset member. The damping bushing assembly is mounted on the vehicle body, one end of the first connecting rod is hinged to the damping bushing assembly, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to the first connecting end of the rear wheel frame, and the second connecting end of the rear wheel frame is hinged to the vehicle body. The reset member is disposed at at least one connection position, the connection position including a hinge between the first connecting rod and the damping bushing assembly, a hinge between the first connecting rod and the second connecting rod, a hinge between the second connecting rod and the rear wheel frame, and a hinge between the rear wheel frame and the vehicle body; When the rear suspension system vibrates, the first link, the second link and the rear wheel frame change from the first suspension position to the second suspension position, and then return to the first suspension position from the second suspension position. The damping bushing assembly is used to provide the rear suspension system with a first damping force changing from the first suspension position to the second suspension position, and a second damping force changing from the second suspension position to the first suspension position. The return member is used to provide the rear suspension system with a return force returning from the second suspension position to the first suspension position.

2. The rear suspension system according to claim 1, characterized in that: The number of the first connecting rod, the second connecting rod and the rear wheel frame is two each, and a group of the first connecting rod, the second connecting rod and the rear wheel frame are symmetrically arranged on both sides of the vehicle body, the two first connecting rods are respectively hinged to the two sides of the damping bushing assembly, and the second connecting ends of the two rear wheel frames are respectively hinged to the two sides of the vehicle body.

3. The rear suspension system according to claim 2, characterized in that: A first connecting shaft is arranged between the first connecting ends of the two rear wheel frames, and two ends of the first connecting shaft are respectively hinged to the first connecting ends of the two rear wheel frames.

4. The rear suspension system according to claim 1, characterized in that: The rear wheel frame includes a third connecting rod and a rear fork, the rear fork is a V-shaped structure, the two ends of the V-shaped structure are respectively connected to the two ends of the third connecting rod, the first connecting end of the rear wheel frame and the second connecting end of the rear wheel frame are respectively arranged at the two ends of the third connecting rod and on the side opposite to the rear fork.

5. The rear suspension system according to claim 1, characterized in that: The reset member includes a spring body and two clamping feet extending from the outermost spring of the spring body, the two clamping feet are arranged on both sides of the spring body and are arranged opposite to each other, the first connecting rod is provided with a first clamping groove, and the second connecting rod is provided with a second clamping groove, the spring body is sleeved at the hinge of the first connecting rod and the second connecting rod, and the two clamping feet are respectively inserted into the first clamping groove and the second clamping groove.

6. The rear suspension system according to claim 1, characterized in that: The damping bushing assembly includes a lever arm housing, a damping assembly and a rotating assembly. An oil groove is provided on the outer side wall of the rotating assembly, and the oil groove is provided along the circumference of the rotating assembly, and the two ends of the oil groove are not connected, and the rotating assembly is sleeved in the internal accommodation space of the lever arm housing; The damping assembly includes a damping adjustment member and a damping stopper needle, the damping adjustment member is provided with a through hole, the damping adjustment member penetrates from the lever arm housing and abuts against the rotating assembly, and the through hole is located in the oil groove, the through hole is communicated with the oil groove, and the damping adjustment member divides the oil groove into a first oil groove and a second oil groove; the damping stopper needle is arranged on the center line of the through hole, and the damping stopper needle can move up and down along the center line; When the damping stop needle moves to a preset position, the damping stop needle blocks the through hole, and the first oil groove and the second oil groove are no longer connected; when the damping stop needle leaves the preset position, the first oil groove and the second oil groove are connected through the through hole.

7. The rear suspension system according to claim 6, characterized in that: The damping adjustment member includes an adjustment valve body, an adjustment sheet and a spring. The regulating valve body is a hollow structure, and includes an upper end face and a lower end face opposite to each other, and a first side end face and a second side end face opposite to each other, the upper end face is provided with a first through hole, the lower end face is provided with a second through hole, and the first side end face penetrates into the lever arm housing and abuts against the rotating assembly; The regulating plate is provided with a third through hole, the regulating plate is arranged in the regulating valve body, and the third through hole is located on the passage from the first through hole to the second through hole, and the first through hole, the second through hole and the third through hole constitute the through hole; The spring is arranged in the regulating valve body and abuts against the bottom of the regulating sheet.

8. The rear suspension system according to claim 7, characterized in that: The damping needle includes a cylindrical needle body and a conical needle tip portion that are connected to each other; when the damping needle blocks the through hole, the conical needle tip portion is inserted from the first through hole to block the third through hole.

9. The rear suspension system according to claim 8, characterized in that: A boss portion is also provided on the outer periphery of the cylindrical needle stopper body. When the damping needle stops the through hole, the boss portion stops the first through hole.

10. The rear suspension system according to claim 9, characterized in that: The damping stop needle penetrates through an oil cavity opened on the lever arm housing, the tail of the damping stop needle is located in the oil cavity, and the oil cavity port is connected to the oil inlet pipeline assembly.

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