Rear suspension system

Abstract

The utility model 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 utility model relates to vehicle architecture technical field especially relates to a rear suspension system. BACKGROUND

[0002] The soft-tail bicycle on the market needs to be matched with a rear shock absorber to realize the shock absorption and damping effect, and various connecting rod structures plus a shock absorber will make the structure of the soft-tail bicycle complex and increase the weight, so it is necessary to restructure the soft-tail structure. SUMMARY

[0003] Therefore, the utility model provides a rear suspension system to solve the problem of space occupation and weight increase of the soft-tail bicycle due to the rear shock absorber in the prior art.

[0004] To achieve one or part or all of the above purposes or other purposes, the utility model provides a rear suspension system, which comprises a vehicle body, a first connecting rod, a second connecting rod, a rear wheel frame, a damping bushing assembly and a reset member,

[0005] The damping bushing assembly is installed 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 a first connecting end of the rear wheel frame, and a second connecting end of the rear wheel frame is hinged to the vehicle body,

[0006] The reset member is arranged at at least one connecting position, and the connecting position comprises the hinge between the first connecting rod and the damping bushing assembly, the hinge between the first connecting rod and the second connecting rod, the hinge between the second connecting rod and the rear wheel frame, and the hinge between the rear wheel frame and the vehicle body.

[0007] When the rear suspension system vibrates, the first connecting rod, the second connecting rod and the rear wheel frame change from a first suspension position to a second suspension position and then reset from the second suspension position to the first suspension position, the damping bushing assembly is used to provide a first damping force from the first suspension position to the second suspension position and a second damping force from the second suspension position to the first suspension position to the rear suspension system, and the reset member is used to provide a reset force from the second suspension position to the first suspension position to the rear suspension system.

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

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

[0010] Further, the rear wheel frame comprises 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 on the two ends of the third connecting rod and on the sides opposite to the rear fork.

[0011] Further, the reset member comprises a spring body and two clamping legs extending from the outermost coil of the spring body, the two clamping legs are arranged on the two sides of the spring body and are oppositely arranged, the first connecting rod is provided with a first clamping groove, 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 legs are respectively inserted into the first clamping groove and the second clamping groove.

[0012] Further, the damping bushing assembly comprises a lever shell, a damping assembly and a rotating assembly,

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

[0014] The damping assembly comprises a damping adjusting member and a damping stop pin, the damping adjusting member is provided with a through hole, the damping adjusting member penetrates into the rotating assembly from the lever shell, the through hole is located in the oil groove, the through hole is communicated with the oil groove, the damping adjusting member divides the oil groove into a first oil groove and a second oil groove, and the damping stop pin is arranged on the center line of the through hole and can move up and down along the center line.

[0015] When the damping stop pin moves to a preset position, the damping stop pin blocks the through hole, and the first oil groove and the second oil groove are no longer through; when the damping stop pin moves away from the preset position, the first oil groove and the second oil groove are through by the through hole.

[0016] Further, the damping adjusting member comprises an adjusting valve body, an adjusting sheet and a spring,

[0017] The adjusting valve body is a hollow structure, the adjusting valve body comprises opposite upper and lower end faces and opposite first and second side end faces, the first through hole is arranged on the upper end face, the second through hole is arranged on the lower end face, and the first side end face penetrates into the lever shell and abuts against the rotating assembly.

[0018] The adjusting piece is arranged in the adjusting valve body, and the third through hole is located on a passage of the first through hole pointing to the second through hole.

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

[0020] Further, the damping stopper comprises a cylindrical stopper body and a conical needle tip part connected with each other; when the damping stopper blocks the through hole, the conical needle tip part is inserted into the first through hole to block the third through hole.

[0021] Further, the cylindrical stopper body is further provided with a boss part; when the damping stopper blocks the through hole, the boss part blocks the first through hole.

[0022] Further, the damping stopper is inserted through an oil cavity arranged on the lever housing, the tail part of the damping stopper is located in the oil cavity, and the oil cavity is connected with an oil inlet pipeline assembly.

[0023] The embodiment of the utility model has the following beneficial effects:

[0024] The rear suspension system of the embodiment increases the first connecting rod and the second connecting rod in the original vehicle body structure, cooperates with the damping bushing assembly and the reset member, realizes the lightweight design of the rear suspension system, has compact structure, occupies small space, and greatly improves the riding experience of users. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0026] Among them:

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

[0028] Figure 2 It is an exploded structural schematic view of the rear suspension system in one embodiment;

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

[0030] Figure 4 It is an exploded structural schematic view of the connecting part of the first connecting rod and the second connecting rod in one embodiment;

[0031] Figure 5 Structure diagram of damping bushing assembly in one embodiment;

[0032] Figure 6 Structure diagram of damping bushing assembly in one embodiment;

[0033] Figure 7 Structure diagram of damping bushing assembly in one embodiment;

[0034] Figure 8 Structure diagram of damping bushing assembly in one embodiment;

[0035] Figure 9 Structure diagram of damping bushing assembly in one embodiment;

[0036] Figure 10 Structure diagram of damping bushing assembly in one embodiment;

[0037] Brief Description of the Drawings:

[0038] 1: Lever housing; 101: Oil cavity; 102: Connecting fin;

[0039] 2: Damping assembly; 21: Damping adjusting piece; 211: Through hole; 212: Adjusting valve body; 2121: First through hole; 2122: Second through hole; 2123: Valve hole; 2124: Valve cover; 213: Adjusting piece; 2131: Third through hole; 214: Spring; 22: Damping stop pin; 221: Cylindrical stop pin body; 222: Conical pin tip; 223: Boss part;

[0040] 3: Rotating assembly; 31: Oil groove; 311: First oil groove; 312: Second oil groove; 32: Quadrangular hole; 33: Sealing groove;

[0041] 4: Second connecting shaft; 5: First connecting rod; 51: Quadrangular connecting bolt; 52: First clamping groove; 6: Second connecting rod; 61: Second clamping groove; 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: Resetting piece; 91: Spring body; 92: Clamping leg; 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 commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise", "comprising", "comprises", "including", "includes" or "contain" or "containing" is to be construed as specifying the presence of stated features or steps and is not intended to preclude the presence or addition of one or more other features, steps or options; the use herein of terms such as "first", "second" and "third" and the like is to be construed as distinguishing between different objects, and not necessarily describing a particular sequential order.

[0045] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that an embodiment in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with one another.

[0046] In order to make the technical personnel of the present technology better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings.

[0047] With reference to Figure 1 and Figure 2 Embodiments of the application illustrate a rear suspension system, comprising a vehicle body 8, a first connecting rod 5, a second connecting rod 6, a rear wheel carrier 7, a damping bushing assembly 10 and a return member 9,

[0048] The damping bushing assembly 10 is installed 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 a first connecting end 703 of the rear wheel carrier 7, and a second connecting end 704 of the rear wheel carrier 7 is hinged to the vehicle body 8,

[0049] The return member 9 is arranged at at least one connecting position, and the connecting position comprises the hinged position of the first connecting rod 5 and the damping bushing assembly 10, the hinged position of the first connecting rod 5 and the second connecting rod 6, the hinged position of the second connecting rod 6 and the rear wheel carrier 7, and the hinged position of the rear wheel carrier 7 and the vehicle body 8;

[0050] When the rear suspension system is in shock, the first connecting rod 5, the second connecting rod 6 and the rear wheel frame 7 change from the first suspension position to the second suspension position and then return to the first suspension position, the damping bushing assembly 10 provides the first damping force for the rear suspension system when changing from the first suspension position to the second suspension position and the second damping force when changing from the second suspension position to the first suspension position, and the reset member 9 provides the reset force for the rear suspension system when returning from the second suspension position to the first suspension position.

[0051] In the embodiment, a plurality of connecting fins 102 are arranged on the damping bushing assembly 10, and the connecting fins 102 are fixedly installed 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 is in shock (for example, encountering bumps, road stones, etc.), the rear wheel is lifted upward, the rear wheel frame 7 rotates clockwise around the second connecting end 704 by a certain angle, so that the first connecting 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 connecting end of the second connecting rod 6) to rotate clockwise, thereby driving the one end of the first connecting rod 5 (i.e., the connecting end of the damping bushing assembly 10) to rotate clockwise by 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 as to quickly deform the rear suspension system to the second suspension position, and quickly adjust the height of the rear wheel to adapt to the road conditions.

[0053] When the road is no longer bumpy, the rear suspension system returns from the second suspension position to the first suspension position under the reset force of the reset member 9, the first connecting rod 5 rotates counterclockwise, pushes the second connecting rod 6 to move backward, and then drives the rear wheel frame 7 to rotate counterclockwise to return to the original position. In this process, the damping bushing assembly 10 provides the second damping force, which is greater than the first damping force, so as to slowly reset the rear wheel.

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

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

[0056] The first connecting shaft 705 is arranged 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, and improve the synchronous effect of the angle rotation of the rear wheel frames 7 on both sides when the rear wheels vibrate.

[0057] The second connecting shaft 4 is arranged between the two first connecting rods 5, penetrates the damping bushing assembly 10, and 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, and the other end of the second connecting shaft 4 penetrates out of the first connecting rod 5 on the other side, and is locked by a fastener, so as to realize the assembly of the first connecting rods 5 on both sides of the damping bushing assembly 10, fix the lateral positions of the first connecting rods 5 on both sides of the vehicle body 8, and improve the synchronous effect of the angle rotation of the first connecting rods 5 on both sides when the rear wheels vibrate.

[0058] Referring to Figure 3 In one specific embodiment, the rear wheel frame 7 comprises a third connecting rod 702 and a rear fork 703. The rear fork 703 has a V-shaped structure, and 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 of the rear wheel frame 7 and the second connecting end 704 of the rear wheel frame 7 are respectively arranged on the sides opposite to the rear fork 703 at the two ends of the third connecting rod 702. The rear fork 703 is connected to the wheels, and the third connecting rod 702 connects the two ends of the V-shaped structure of the rear fork 703, so as to form a triangular structure. When the rear wheels vibrate, the position of the rear fork 703 changes, and then the third connecting rod 702 changes in angle. 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] Referring to Figure 4 In one specific embodiment, the reset member 9 is arranged at the hinge position of the first connecting rod 5 and the second connecting rod 6. The reset member 9 comprises a spring body 91 and two clamping legs 92 extending from the outermost coil of the spring body 91. The two clamping legs 92 are arranged on the two sides of the spring body 91 and are oppositely arranged. 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 position of the first connecting rod 5 and the second connecting rod 6, and the two clamping legs 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 included angle between the first connecting rod 5 and the second connecting rod 6 changes due to external force, the reset member 9 deforms, the two clamping legs 92 are pressed or pulled apart, and then the reset member 9 generates a reset force resisting the deformation. The reset force is used to drive the first connecting rod 5 and the second connecting rod 6 to return to the included angle in the stable state through the two clamping legs 92.

[0061] In some other specific embodiments of the present application, the reset member 9 can be arranged at the hinged joint between the first connecting rod 5 and the damping bush assembly 10, or the hinged joint between the second connecting rod 6 and the rear wheel frame 7, or the hinged joint between the rear wheel frame 7 and the vehicle body 8. The connection structure of the reset member 9 can refer to the above embodiments, and the difference is that the clamping groove for clamping the clamping leg is arranged on another component, which will not be described in detail herein.

[0062] In some other specific embodiments of the present application, the reset member 9 can be arranged at the hinged joint between the first connecting rod 5 and the damping bush assembly 10, or the hinged joint between the second connecting rod 6 and the rear wheel frame 7, or the hinged joint between the rear wheel frame 7 and the vehicle body 8. The connection structure of the reset member 9 can refer to the above embodiments, and the difference is that the clamping groove for clamping the clamping leg is arranged on another component, which will not be described in detail herein.

[0063] Referring to Figure 5 and Figure 6 , the damping bush assembly 10 comprises an arm shell 1, a damping assembly 2 and a rotating assembly 3;

[0064] The outer side wall of the rotating assembly 3 is provided with an oil groove 31, the oil groove 31 is arranged along the circumference of the rotating assembly 3, the two ends of the oil groove 31 are not communicated, and the rotating assembly 3 is sleeved in the internal accommodation space of the arm shell 1;

[0065] The damping assembly 2 comprises a damping adjusting member 21 and a damping stop needle 22, the damping adjusting member 21 is provided with a through hole 211, the damping adjusting member 21 penetrates into the rotating assembly 3 from the arm shell 1, and the through hole 211 is located in the oil groove 31, the through hole 211 is communicated with the oil groove 31, and the damping adjusting member 21 divides the oil groove 31 into a first oil groove 311 and a second oil groove 312; the damping stop needle 22 is arranged on the center line of the through hole 211, and the damping stop needle 22 can move up and down along the center line;

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

[0067] In the embodiment, the arm shell 1 is used to accommodate the component structures of the damping bush assembly 10, and simultaneously forms a storage space together with the component structures installed therein, and the storage space is used to accommodate viscous liquid (such as brake oil) acting on the damping bush assembly 10. The openings on the arm shell 1 should be sealed in a suitable manner (such as a sealing rubber ring), so as to avoid leakage of the viscous liquid.

[0068] The two sides of the arm shell 1 are respectively provided with openings to form a channel extending in the horizontal direction, and the rotating assembly 3 is sleeved in the channel, and the outer side wall of the rotating assembly 3 (relative to the side wall of the protruding part of the oil groove 31) is attached to the inner side wall of the arm shell 1, so that the viscous liquid in the oil groove 31 is sealed in the oil storage space in the arm shell 1. The rotating assembly 3 can rotate relative to the arm shell 1. In an embodiment, the outer side wall of the rotating assembly 3 is respectively provided with a sealing groove 33 on both sides of the oil groove 31, and a sealing ring 11 is arranged in the sealing groove 33. Thus, the leakage of the viscous liquid in the oil groove 31 is avoided.

[0069] The end of the damping adjusting member 21 is matched with the structure of the oil groove, so that when the two are abutted, there is no or very small gap between the end of the damping adjusting member 21 and the oil groove. The rotating assembly 3 can rotate relative to the end of the damping adjusting member 21. When the rotating assembly 3 rotates, the viscous liquid in the oil groove 31 is rotated, and according to the rotation direction of the rotating assembly 3, the viscous liquid flows from the first oil groove 311 to the second oil groove 312 through the through hole 211, or from the second oil groove 312 to the first oil groove 311 through the through hole 211. When the damping stop pin 22 blocks the through hole 211, the first oil groove 311 and the second oil groove 312 are no longer through. At this time, the flow of the viscous liquid in the oil groove 31 is severely hindered, thereby generating a larger damping force. When the damping stop pin 22 deviates from the preset position, the through hole 211 re-connects the first oil groove 311 and the second oil groove 312, and the viscous liquid can flow smoothly, and the damping force is correspondingly reduced.

[0070] The above-mentioned preset position is the position at which the damping stop pin 22 blocks the through hole 211, and for different specifications of the damping bushing assembly 10, the preset position can be different, and the preset position can be determined in the debugging stage. It can be understood that when the damping stop pin 22 deviates from the preset position, there are also partial blocking and no blocking conditions, and therefore in actual use, the degree of blocking of the through hole (the degree of blocking can be any value from 0 to 1) can be adjusted by adjusting the position of the damping stop pin 22, and the size of the damping force can be adjusted.

[0071] By adjusting the relative position of the damping stop pin 22 and the through hole 211, the opening degree 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, and the size of the damping force can be adjusted to adapt to different road conditions and different user needs, and the riding experience is improved.

[0072] Reference Figure 7In one embodiment, the damping adjusting member 21 comprises an adjusting valve body 212, an adjusting valve plate 213 and a spring 214. The adjusting valve body 212 is a hollow structure, comprising opposite upper and lower end faces, and opposite first and second side end faces. The upper end face is provided with a first through hole 2121, and the lower end face is provided with a second through hole 2122. The first side end face penetrates into the lever housing 1 and abuts against the rotating assembly 3. The adjusting valve plate 213 is provided with a third through hole 2131, and is arranged in the adjusting valve body 212. 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 adjusting valve body 212 and abuts against the bottom of the adjusting valve plate 213.

[0073] In this embodiment, the spring 214 abuts against the bottom of the adjusting valve plate 213 and provides an upward pushing force to the adjusting valve plate 213. Under the action of external force, the adjusting valve plate 213 moves up and down in the adjusting valve body 212 by compressing or stretching the spring 214. The sizes of the first through hole 2121, the second through hole 2122 and the third through hole 2131 can be equal or not equal. The first side end face abuts against the rotating assembly 3 closely. When the rotating assembly 3 rotates, the position of the adjusting valve body 212 is fixed and does not rotate with the rotating assembly 3. The adjusting valve plate 213 in the adjusting valve body 212 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 adjusting valve plate 213, a downward pushing force is generated on the adjusting valve plate 213. The downward pushing force is greater than the upward pushing force of the spring, and the spring 214 is compressed downward, thereby increasing the distance between the damping stop needle 22 and the adjusting valve plate 213. In the initial state (before the rotating assembly 3 rotates), when the damping stop needle 22 completely or partially blocks the third through hole 213, the downward pushing force can increase the opening degree of the adjusting valve 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 flows through the third through hole 213 at a higher speed, thereby reducing the damping force.

[0075] When the rotating assembly 3 rotates counterclockwise, the oil in the first oil groove 311 is pushed to flow into the second oil groove 312. When the oil flows to the adjusting valve plate 213, an upward pushing force is generated on the adjusting valve plate 213. Combined with the upward pushing force of the spring, the sum of the pushing forces pushes the adjusting valve plate 213 upward, and in some cases, the adjusting valve plate 213 finally abuts against the upper end face of the inner side of the adjusting valve body. The distance between the damping stop needle 22 and the adjusting valve plate is reduced, and the opening degree 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, i.e. the damping force is increased.

[0076] The embodiment realizes flexible adjustment of damping force in use by adjusting the position of the adjusting piece 213 and the damping stop needle 22.

[0077] Referring to Figure 8 In one embodiment, the third through hole 2131 has opposite first and second openings, the first opening is located on the side close to the insertion direction of the damping stop needle, the diameter of the first opening is smaller than that of the second opening, the spring 214 is installed at the second opening, and the diameter of the spring 214 is smaller than that of the first opening, so that stable connection with the adjusting piece 213 can be realized.

[0078] Referring to Figure 8 In one embodiment, the damping stop needle 22 comprises a cylindrical stop needle body 221 and a conical needle tip 222 connected with each other; when the damping stop needle 22 blocks the through hole 211, the conical needle tip 222 is inserted into the third through hole 2122 from the first through hole 2121.

[0079] In the embodiment, when the damping stop needle 22 moves up and down to adjust the opening degree of the through hole 211, the conical needle tip 222 blocks the through hole. The deeper the conical needle tip 222 is inserted into the third through hole 2122, the smaller the opening degree of the third through hole 2122, and the greater the damping force of the damping bushing assembly 10. The design of the conical structure also realizes that the opening degree of the third through hole 2122 can theoretically realize any opening degree before 0-1, so as to realize flexible adjustment of the damping force.

[0080] Referring to Figure 8 In one embodiment, the cylindrical stop needle body 221 further comprises a boss 223, and when the damping stop needle 22 blocks the through hole 211, the boss 223 blocks the first through hole 2121.

[0081] In the embodiment, the boss 223 is further provided to realize complete blocking of the through hole 211. In some cases, the conical needle tip 222 cannot completely block the third through hole 2122, or even if the third through hole 2122 is blocked, the viscous liquid can still flow from the gap between the first through hole 2121 and the cylindrical stop needle body 221 into the adjusting valve body 212, and then flow out through the gap of the adjusting valve body 212. The boss 223 completely blocks the first through hole 2121, so as to completely block the viscous liquid and maximize the damping force.

[0082] Referring to Figure 7 In one embodiment, the second side end surface of the adjusting valve body 212 is provided with a valve hole 2123, the valve hole 2123 is closed by a valve cover 2124, and the adjusting piece 213 is put into the adjusting valve body 212 from the valve hole 2123.

[0083] In this embodiment, the valve cover 2124 is installed on the valve hole 2123 by the bolt 12, and the sealing ring 11 is arranged between the valve hole 2123 and the valve cover 2124 to prevent the leakage of the viscous liquid. The adjusting piece 213 and the spring 214 are both put into the adjusting valve body 212 from the valve hole 2123, and then the bottom of the spring 214 is fixed (for example, welded, glued, etc.) on the inner bottom surface of the adjusting valve 212 to complete the assembly of the damping adjusting member.

[0084] Referring to Figure 7 In one embodiment, the damping stop needle 22 is inserted through the oil cavity 101 formed on the arm shell 1, the tail of the damping stop needle 22 is located in the oil cavity 101, and the oil cavity opening is connected to the oil inlet pipeline assembly 13.

[0085] In this embodiment, the upper part of the damping stop needle 22 is tightly attached to the inner side wall of the oil cavity 101, a plurality of sealing grooves are formed in the upper part of the damping stop needle 22, the sealing ring 11 is arranged in the sealing groove, and the damping stop needle 22 can move up and down relative to the oil cavity 101. The oil cavity 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 cavity opening into the upper half of the oil cavity 101. Since the tail of the damping stop needle 22 blocks the oil cavity, the oil in the oil inlet pipeline assembly 13 cannot enter the internal containing space of the arm shell 1, but generates a downward pushing force on the tail of the damping stop needle 22, and the damping stop needle 22 moves downward under the action of the pushing force to reduce the opening degree 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 rod 131, a connecting sleeve 132, and a second screw rod 133. The connecting sleeve 132 is sleeved on the outside of the first screw rod 131, the lower half of the first screw rod 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 the second screw rod 133. The connecting sleeve 132 and the first screw rod 131 are both hollow structures, the viscous liquid filled in the oil inlet pipeline 134 enters the hollow pipeline of the connecting sleeve 132, then enters the hollow pipeline of the first screw rod 131, and further enters the oil cavity 101 to push the damping stop 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 or the like, and can use the oil control device in the prior art or other designs as long as the viscous liquid can be pushed to flow back and forth. The structure of the utility model is not described in detail.

[0087] Referring to Figure 1 , Figure 9 and Figure 10The rotating assembly 3 is provided with a quadrangular hole 32, the first end side of the first connecting rod 5 is provided with a corresponding quadrangular connecting bolt 51, the two quadrangular connecting bolts 51 of the two first connecting rods 5 are respectively inserted into the two ends of the quadrangular hole 32, and then the second connecting shaft 4 is inserted into the quadrangular hole 32 from the first connecting rod 5 on one side, and the other end of the second connecting shaft 4 is inserted out of the first connecting rod 5 on the other side, and fastening is adopted to lock, so that the assembly of the first connecting rods 5 on the two sides of the rotating assembly 3 is realized.

[0088] Before riding, the user can adjust the shock knob according to experience and estimated road conditions, and apply appropriate pressure to the damping stop needle 22 through the oil inlet pipeline assembly 13, so that the damping stop needle 22 moves to a suitable position to completely or partially block the through hole 211 (specifically according to the actual use condition). During riding, when encountering road bumps and the like, the rear wheel vibrates, for example, is lifted upward, 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 adjusting piece 213 to move downward, reducing the blocked area of the through hole 211, increasing the opening degree of the through hole 211 (that is, the flow-through area of the viscous liquid is increased), reducing the damping force, and facilitating the rapid adjustment of the position of the rear wheel to adapt to the road conditions. When the road is no longer bumpy, under the action of the reset force of the reset member 9, the other end of the first connecting rod 5 (that is, the end hinged with the second connecting rod 6) is reset backward, driving the one end of the first connecting rod 5 (that is, the end hinged with 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 piece 213 to move upward, reducing the opening degree of the through hole 211, increasing the damping force, and slowing down the clockwise rotation reset speed of the first connecting rod 5, and then the reset speed of the other connecting rods is also correspondingly slowed down, and the rear wheel is slowly reset, which greatly reduces the vibration feeling of the user and improves the riding comfort and user experience.

[0089] The rear suspension system provided by the embodiment of the utility model, by adding the first connecting rod 5 and the second connecting rod 6 in the original vehicle body structure, and cooperating with the damping bushing assembly 10 and the reset member 9, by adjusting the relative position of the damping stop needle 22 and the through hole 211 in the damping bushing assembly 10, and then adjusting the opening degree of the through hole 211 (that is, the ratio of the area through by the viscous liquid to the area of the through hole), in the process of riding the wheel bouncing and resetting, adaptively matching different damping forces, to flexibly adapt to different road conditions and the needs of different users, and the overall structure of the rear suspension system is compact, light and easy to operate, which greatly improves the riding experience of the user.

[0090] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace some of the technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A rear suspension system characterized by, The rear suspension system comprises a vehicle body, a first connecting rod, a second connecting rod, a rear wheel frame, a damping bushing assembly and a restoring member, The damping bushing assembly is mounted on the vehicle body, one end of the first connecting rod is hingedly connected to the damping bushing assembly, the other end of the first connecting rod is hingedly connected to one end of the second connecting rod, the other end of the second connecting rod is hingedly connected to a first connecting end of the rear wheel frame, and a second connecting end of the rear wheel frame is hingedly connected to the vehicle body, The restoring member is arranged at at least one connecting position, and the connecting position comprises the hinge connection between the first connecting rod and the damping bushing assembly, the hinge connection between the first connecting rod and the second connecting rod, the hinge connection between the second connecting rod and the rear wheel frame, and the hinge connection between the rear wheel frame and the vehicle body; When the rear suspension system is in vibration, the first connecting rod, the second connecting rod and the rear wheel frame change from a first suspension position to a second suspension position and then return to the first suspension position from the second suspension position, the damping bushing assembly provides a first damping force for the rear suspension system when changing from the first suspension position to the second suspension position and a second damping force when changing from the second suspension position to the first suspension position, and the restoring member provides a restoring force for the rear suspension system when returning from the second suspension position to the first suspension position.

2. The rear suspension system of claim 1, wherein The number of the first connecting rod, the second connecting rod and the rear wheel frame is two, and a set of the first connecting rod, the second connecting rod and the rear wheel frame is symmetrically arranged on both sides of the vehicle body, and the two first connecting rods are respectively hingedly connected to both sides of the damping bushing assembly, and the second connecting ends of the two rear wheel frames are respectively hingedly connected to both sides of the vehicle body.

3. The rear suspension system of claim 2, wherein A first connecting shaft is arranged between the first connecting ends of the two rear wheel frames, and the two ends of the first connecting shaft are respectively hingedly connected to the first connecting ends of the two rear wheel frames.

4. The rear suspension system of claim 1, wherein The rear wheel frame comprises a third connecting rod and a rear fork, the rear fork has 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 on the two ends of the third connecting rod and on the sides opposite to the rear fork.

5. The rear suspension system of claim 1, wherein The restoring member comprises a spring body and two clamping legs extending from the outermost coil of the spring body, the two clamping legs are arranged on the two sides of the spring body and opposite to each other, the first connecting rod is provided with a first clamping groove, the second connecting rod is provided with a second clamping groove, the spring body is sleeved at the hinge connection between the first connecting rod and the second connecting rod, and the two clamping legs are respectively inserted into the first clamping groove and the second clamping groove.

6. The rear suspension system of claim 1, wherein The damping bushing assembly comprises a lever shell, a damping assembly and a rotating assembly, An oil groove is arranged on the outer side wall of the rotating assembly, the oil groove is arranged along the circumference of the rotating assembly, and the two ends of the oil groove are not communicated, and the rotating assembly is sleeved in the internal accommodating space of the lever shell. The damping assembly comprises a damping adjusting member and a damping stop needle, the damping adjusting member is provided with a through hole, the damping adjusting member penetrates into the rotating assembly from the lever shell, the through hole is located in the oil groove, the through hole is communicated with the oil groove, the damping adjusting member divides the oil groove into a first oil groove and a second oil groove, the damping stop needle is arranged on the center line of the through hole, and the damping stop 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 through; when the damping stop needle moves away from the preset position, the first oil groove and the second oil groove are through by the through hole.

7. The rear suspension system of claim 6, wherein The damping adjusting member comprises an adjusting valve body, an adjusting sheet and a spring, The adjusting valve body is a hollow structure, the adjusting valve body comprises opposite upper and lower end faces and opposite first and second side end faces, 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 shell and abuts against the rotating assembly; The adjusting sheet is provided with a third through hole, the adjusting sheet is arranged in the adjusting valve body, and the third through hole is located on the passage of 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 adjusting valve body and abuts against the bottom of the adjusting sheet.

8. The rear suspension system of claim 7, wherein The damping stop needle comprises a cylindrical stop needle body and a conical needle tip part connected with each other; when the damping stop needle blocks the through hole, the conical needle tip part is inserted into the first through hole to block the third through hole.

9. The rear suspension system of claim 8, wherein, The cylindrical stop needle body is further provided with a boss part, and when the damping stop needle blocks the through hole, the boss part blocks the first through hole.

10. The rear suspension system of claim 9, wherein The damping stop needle penetrates through an oil cavity formed in the lever shell, the tail part of the damping stop needle is located in the oil cavity, and the oil cavity opening is connected with an oil inlet pipeline assembly.

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