Anti-vibration structure capable of being adjusted in pitching mode and anti-vibration vehicle applying anti-vibration structure

Abstract

The utility model provides a shock-absorbing structure capable of being adjusted in a pitching mode and a shock-absorbing vehicle using the shock-absorbing structure. The shock-absorbing structure comprises a seat tube. The connector is mounted at the top end of the seat tube, and a via hole is communicated with the seat tube; the bottom end of the supporting rod abuts against the interior of the seat tube through a spring, and the top end extends out of the connector; the bottom end of the first connecting rod is hinged to one side of the connector and provided with a first protruding part hinged to a roller, and the roller is arranged at the top end of the supporting rod; the bottom end of the second connecting rod is hinged to the other side of the connector; two ends of the bottom of the connecting rod support are respectively hinged to the top ends of the first connecting rod and the second connecting rod; the top of the connecting rod support is an inclined supporting face, the middle of the connecting rod support is provided with a containing cavity communicated with the outside of the connecting rod support, and the high-low side of the inclined supporting face is provided with a through hole and a mounting hole. One end of the adjusting screw is provided with an adjusting knob positioned in the accommodating cavity, and the other end extends out of the connecting rod support from the through hole; the front end of the adjusting support is provided with a first connecting hole connected with the adjusting screw, the rear end of the adjusting support is provided with a second connecting hole, and the fixing screw is arranged between the second connecting hole and the mounting hole in a penetrating mode.

Description

Technical Field

[0001] The utility model relates to the technical field of shock-absorbing vehicle manufacturing, in particular to a shock-absorbing structure capable of being adjusted in pitch and a shock-absorbing vehicle using the same. Background Art

[0002] The world advocates energy conservation and emission reduction, and my country is a well-deserved bicycle and electric vehicle power country. Various bicycles, electric vehicles and scooters are widely used. Among them, shock-absorbing bicycles have become a very important type of bicycles, electric vehicles and scooters because they can buffer and shock the seat load, avoid bumps during riding, and improve the comfort of riders. And they are becoming more and more popular.

[0003] In the existing shock-absorbing vehicles, the shock-absorbing structure is usually connected to the top of the seat tube, and the seat cushion is installed on the top of the shock-absorbing structure through a pitch adjustment structure. In the prior art, there is a type of shock-absorbing vehicle that uses a four-bar linkage as the shock-absorbing structure, in which the bottom end of the front link of the four-bar linkage is hinged to one side of the top of the seat tube, the bottom end of the rear link of the four-bar linkage is hinged to the other side of the top of the seat tube, and the front link and the rear link are hinged to the seat tube in a staggered arrangement; the front and rear ends of an upper link are respectively hinged to the top of the front link and the rear link, and the bottom end of a support rod is abutted against the inner side of the seat tube through a spring, and the top of the support rod extends upward from the seat tube to between the front link and the rear link, and the middle of the front link and the rear link that is hinged to the seat tube with a higher height abuts against the top of the support rod.

[0004] This type of suspension vehicle that uses a four-bar linkage as its suspension structure has a traditional seat pitch adjustment structure that usually includes a cross tube seat fixedly mounted on the top of an upper link, with a pair of seat bow clamps connected to the left and right sides of the cross tube seat by screw locking, and the seat bow clamps are provided with clamping grooves for clamping the seat bow at the bottom of the seat. The seat pitch adjustment structure of a suspension vehicle with a four-link mechanism suspension structure using a cross tube seat side locking seat bow clip type has the following defects: First, since the four-link mechanism is arranged on the top of the seat tube, the seat height has been greatly increased. If a cross tube seat side locking seat bow clip type seat pitch adjustment structure is arranged on the top of the four-link mechanism, the height of the seat from the pedal will be further greatly increased due to the large height of the cross tube seat, resulting in a rider with a short stature having difficulty stepping on the pedal or having to stretch his legs when sitting astride the seat, which makes riding difficult; Second, the seat pitch adjustment structure of the cross tube seat side locking seat bow clip type seat requires first completely removing the locking screws connected between a pair of seat bow clips and the cross tube seat, and then manually turning the seat to adjust its pitch angle relative to the horizontal ground, resulting in the seat pitch adjustment operation being very difficult and inconvenient, affecting the user experience.

[0005] In addition, the existing shock-absorbing vehicles that use a four-bar linkage as a shock-absorbing structure have large gaps between the upper link, front link, rear link and support rod of the four-bar linkage. The user's fingers can easily be pinched by carelessly inserting them into the gaps, causing certain safety hazards. Utility Model Content

[0006] The utility model provides a pitch-adjustable shock-absorbing structure and a shock-absorbing vehicle using the same, so as to solve the technical problem that the shock-absorbing vehicle of the prior art type with a four-link shock-absorbing mechanism adopts a traditional seat cushion pitch-adjustable structure, resulting in a large seat cushion height and inconvenience for riders with short height to sit astride.

[0007] In order to solve the above problems, the technical solution adopted by the utility model is:

[0008] The utility model provides a pitch-adjustable shock-absorbing structure, comprising:

[0009] Seat tube;

[0010] The connector has a through hole that matches the shape of the hollow inner side of the seat tube, the connector is butt-mounted on the top of the seat tube, and the through hole is connected to the hollow inner side;

[0011] A support rod, the bottom end of which is abutted against the inner side of the hollow space through a spring, and the top end of which extends upwardly out of the joint;

[0012] A first connecting rod, the bottom end of which is hinged to one side of the joint, a first protrusion is provided on one side of the first connecting rod, the first protrusion is hinged to a roller, and the roller can rollably act on the top end of the support rod;

[0013] a second connecting rod, the bottom end of which is hinged to the other side of the joint;

[0014] A connecting rod support, one end of the bottom of the connecting rod support is hinged to the top of the first connecting rod, and the other end of the bottom of the connecting rod support is hinged to the top of the second connecting rod; the top of the connecting rod support is an inclined supporting surface, and the middle of the connecting rod support is provided with a receiving cavity connected to the outside of the connecting rod support, and the inclined supporting surface is provided with a through hole connected to the receiving cavity on the side with a lower height, and the inclined supporting surface is provided with a mounting hole on the other side with a higher height;

[0015] An adjusting screw, one end of which is provided with an adjusting knob, which is arranged in the accommodating cavity, and the other end of which passes through the through hole and extends out of the connecting rod support;

[0016] An adjusting bracket, a first connecting hole is provided at the front end of the adjusting bracket, and the first connecting hole is connected to the other end of the adjusting screw; a second connecting hole is provided at the rear end of the adjusting bracket, and the rear end of the adjusting bracket is connected to the connecting rod support through a fixing screw passing between the second connecting hole and the mounting hole.

[0017] Furthermore, a limiting step is provided on the inclined support surface between the through hole and the mounting hole, and the shock-absorbing structure further comprises:

[0018] A fixed bracket is fixedly mounted on the inclined support surface and abuts against the limit step; a pair of lower grooves are respectively provided on both sides of the fixed bracket;

[0019] A pair of upper grooves matching the shape of the lower grooves are respectively arranged on both sides of the adjustment bracket, and the pair of upper grooves and the pair of lower grooves respectively correspond to form a pair of clamping sleeves for clamping the bottom seat bow of the seat cushion.

[0020] Preferably, the seat tube comprises:

[0021] tube body;

[0022] A bottom cover, threadedly connected to the bottom end of the tube body and sealing the hollow inner side;

[0023] The spring abuts between the bottom cover and the support rod.

[0024] Preferably, a transition cone is provided on the outer side of the tube body near the top of the tube body, and a sleeve portion with an outer diameter reduced relative to the bottom of the tube body is formed between the transition cone and the top of the tube body;

[0025] The shape of the through hole matches the shape of the sleeve portion, and a mounting cone surface matching the transition cone surface is provided at the bottom end of the joint where the through hole is connected;

[0026] The joint is sleeved on the outer side of the sleeve connection part through the through hole, and is fastened to the top end of the pipe body through the matching of the installation cone surface and the transition cone surface.

[0027] Furthermore, the pitch-adjustable shock-absorbing structure also includes:

[0028] The wear-resistant sleeve matches the shape of the inner side of the hollow, and an annular flange is arranged around the top of the wear-resistant sleeve. The wear-resistant sleeve is inserted into the inner side of the hollow and supported on the top of the sleeve portion through the annular flange.

[0029] Preferably, a lower boss is provided at the top end of the bottom cover, an upper boss is provided at the bottom end of the support rod, and two ends of the spring are respectively and correspondingly abutted between the upper boss and the lower boss.

[0030] Furthermore, the mounting hole passes through the adjustment bracket, and the shock-absorbing structure further includes:

[0031] A first nut, fixedly installed in the first connecting hole, the first nut being threadedly connected to the other end of the adjusting screw;

[0032] The second nut is fixedly installed in the second connecting hole, and the end of the fixing screw is inserted into the installing hole and then threadedly connected to the second nut.

[0033] Furthermore, the pitch-adjustable shock-absorbing structure also includes:

[0034] The limiting protrusion is arranged on a side of the portion of the support rod extending upward from the joint facing the second connecting rod, so as to limit the turning angle of the second connecting rod when the second connecting rod turns close to the support rod.

[0035] The utility model also provides a shock-absorbing vehicle, comprising a base and a seat cushion, and also comprising the above-mentioned pitch-adjustable shock-absorbing structure, wherein the seat tube is installed on the base, and the seat cushion is installed on the adjustment bracket.

[0036] Preferably, the suspension vehicle is a bicycle, a scooter, an electric vehicle or a folding vehicle.

[0037] Compared with the prior art, the utility model has the following beneficial effects:

[0038] The pitch-adjustable shock-absorbing structure provided by the utility model improves the traditional seat cushion pitch-adjustment structure of the cross-tube seat side lock seat bow clip type connected to the top end of the four-bar mechanism on the top of the seat tube into a seat cushion pitch-adjustment structure using front and rear vertical lock adjustment brackets. When it is necessary to adjust the inclination angle of the adjustment bracket relative to the horizontal ground, it is only necessary to first loosen the fixing screw at the rear and then rotate the adjustment knob to loosen or tighten the adjustment screw at the front, so that the inclination angle of the adjustment bracket and the seat cushion installed thereon relative to the horizontal ground can be easily and quickly adjusted, thereby improving the user experience of using a shock-absorbing vehicle. At the same time, the seat cushion pitch adjustment structure using the front and rear vertical lock adjustment bracket has the advantage of a compact structure, and the height added at the top of the four-bar linkage is small, which avoids the problem that a rider with a shorter stature has difficulty stepping on the pedals and riding hard when sitting astride the seat cushion; in addition, the four-bar linkage of the pitch-adjustable shock-absorbing structure provided by the utility model is further provided with a first protrusion, a second protrusion and a roller between the upper link, the front link, the rear link and the support rod, thereby reducing the gap between the first link, the second link, the link support and the support rod, avoiding the safety hazard of the user's fingers being pinched due to inadvertent insertion of the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solution proposed by the utility model, it is described in detail below in combination with the embodiments and drawings. It should be understood that the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, these drawings can be changed under the concept of the utility model.

[0040] Figure 1 The overall assembly structure of the pitch-adjustable shock-absorbing structure provided by the utility model is three-dimensional Figure 1 ;

[0041] Figure 2 for Figure 1 The exploded structural stereogram of the pitch-adjustable shock-absorbing structure;

[0042] Figure 3The overall assembly structure of the pitch-adjustable shock-absorbing structure provided by the utility model is three-dimensional Figure 2 ;

[0043] Figure 4 for Figure 2 The exploded structural stereogram of the pitch-adjustable shock-absorbing structure;

[0044] Figure 5 The overall assembly structure of the pitch-adjustable shock-absorbing structure provided by the utility model is three-dimensional Figure 3 ;

[0045] Figure 6 for Figure 5 The exploded structural stereogram of the pitch-adjustable shock-absorbing structure;

[0046] Figure 7 for Figure 1 A side view of the overall assembly structure of the pitch-adjustable shock-absorbing structure;

[0047] Figure 8 for Figure 1 A front view of the overall assembly structure of the pitch-adjustable shock-absorbing structure;

[0048] Fig. 9 for Figure 1 A rear view of the overall assembly structure of the pitch-adjustable shock-absorbing structure;

[0049] Fig.10 for Figure 1 A top view of the overall assembly structure of the pitch-adjustable shock-absorbing structure;

[0050] Fig.11 for Figure 1 Bottom view of the overall assembly structure of the pitch-adjustable shock-absorbing structure.

[0051] Among them, the main marks of the drawings in the figure are as follows:

[0052] 1. Seat tube; 11. Tube body; 111. Hollow inner side; 112. Transition cone surface; 113. Sleeve joint; 12. Bottom cover; 13. First lower tube sleeve; 14. Second lower tube sleeve; 121. Lower boss; 15. Wear-resistant sleeve; 151. Annular flange; 2. Joint; 21. Through hole; 22. Mounting cone surface; 3. Support rod; 31. Upper boss; 32. Limiting convex block; 4. Spring; 5. First connecting rod; 51. First protrusion; 511. First protrusion seat; 512. Shaft hole; 52. Roller; 521. Perforation; 53. First main body; 54. First upper extension; 541. First upper ring sleeve; 55. First lower extension; 551. First lower ring sleeve; 56. First lower hinge shaft; 57. First upper hinge shaft; 571. Oil storage tank; 58. rotating shaft; 6. second connecting rod; 61. second protrusion; 611. second protrusion seat; 62. second main body; 63. second upper extension; 631. second upper ring sleeve; 64. second lower extension; 641. second lower ring sleeve; 65. second lower hinge shaft; 66. second upper hinge shaft; 7. connecting rod support; 71. inclined support surface; 711. limiting step; 72. accommodating cavity; 73. through hole; 74. mounting hole; 75. adjusting screw; 751. adjusting knob; 76. first upper pipe sleeve; 77. second upper pipe sleeve; 8. adjusting bracket; 81. first connecting hole; 811. first nut; 82. second connecting hole; 821. second nut; 83. fixing screw; 84. upper groove; 9. fixing bracket; 91. lower groove. DETAILED DESCRIPTION

[0053] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figure 1-11 And embodiments, the utility model is further described in detail.

[0054] Please also read Figure 1-11 The utility model provides a pitch-adjustable shock-absorbing structure, comprising:

[0055] A seat tube 1, which is in an upright position and has a vertically extending hollow inner side 111; a joint 2, which has a through hole 21 matching the shape of the hollow inner side 111 of the seat tube 1, and the joint 2 is docked and installed at the top end of the seat tube 1, and its through hole 21 is connected to the hollow inner side 111; a support rod 3, the bottom end of the support rod 3 is abutted against the hollow inner side 111 through a spring 4, and the top end of the support rod 3 extends upward from the joint 2; a first connecting rod 5, the bottom end of the first connecting rod 5 is hinged to one side of the joint 2, and a first protrusion 51 is provided on one side of the first connecting rod 5, and the first protrusion 51 is hinged to a roller 52, and the roller 52 can rollably act on the top end of the support rod 3; a second connecting rod 6, the bottom end of the second connecting rod 6 is hinged to the other side of the joint 2;

[0056] A connecting rod support 7, one end of the bottom of the connecting rod support 7 is hinged to the top of the first connecting rod 5, and the other end of the bottom of the connecting rod support 7 is hinged to the top of the second connecting rod 6; the top of the connecting rod support 7 is an inclined support surface 71 inclined relative to the horizontal ground, and the middle part of the connecting rod support 7 (the middle part between the top and the bottom of the connecting rod support 7) is provided with a receiving cavity 72 connected to the outside of the connecting rod support 7, and the inclined supporting surface 71 is provided with a through hole 73 connected to the receiving cavity 72 on the side with a lower height, and the inclined supporting surface 71 is provided with a mounting hole 74 on the other side with a higher height;

[0057] An adjusting screw 75, one end of which is provided with an adjusting knob 751, which is arranged in the above-mentioned accommodating cavity 72, and the other end of the adjusting screw 75 passes upward through the through hole 73 and extends out of the connecting rod support 7; an adjusting bracket 8, a front end of which is provided with a first connecting hole 81, which is connected to the other end of the adjusting screw 75; a rear end of the adjusting bracket 8 is provided with a second connecting hole 82, and the rear end of the adjusting bracket 8 is connected to the connecting rod support 7 by a fixing screw 83 which is passed between the second connecting hole 82 and the mounting hole 74.

[0058] The first connecting rod 5, the second connecting rod 6, the connecting rod support 7 and the support rod 3 constitute a four-link mechanism, and the spring 4 abutting between the support rod 3 and the hollow inner side 111 of the seat tube 1 provides an upward buffering force for the connecting rod support 7, so that when the connecting rod support 7 bears a certain load, the mechanical movement of the four-link mechanism and the buffering effect of the spring 4 can cooperate to achieve a smooth vertical lifting movement of the connecting rod support 7 and its load, and achieve shock absorption during the vertical lifting movement.

[0059] At the same time, the pitch-adjustable shock-absorbing structure provided by the utility model improves the traditional cross-tube seat side lock seat bow clamp type seat pitch adjustment structure connected to the top of the four-link shock-absorbing mechanism into a seat pitch adjustment structure using front and rear vertical lock adjustment brackets. When it is necessary to adjust the inclination angle of the adjustment bracket 8 relative to the horizontal ground, it is only necessary to loosen the fixing screw 83 first, and then rotate the adjustment knob 751 to loosen the adjustment screw 75, so as to easily and quickly adjust the inclination angle of the adjustment bracket 8 relative to the horizontal ground.

[0060] Please also read Figure 1-7 In this embodiment, the height at which the bottom end of the first connecting rod 5 is hinged to one side of the seat tube 1 is higher than the height at which the bottom end of the second connecting rod 6 is hinged to the other side of the seat tube 1 .

[0061] In this embodiment, a first lower sleeve 13 is provided on one side of the top of the seat tube 1, and a second lower sleeve 14 is provided on the other side of the top of the seat tube 1, and the height of the first lower sleeve 13 is higher than the second lower sleeve 14; a first upper sleeve 76 is provided on one end of the bottom of the connecting rod support 7, and a second upper sleeve 77 is provided on the other end of the bottom of the connecting rod support 7, and the height of the first and second upper sleeves is higher than the second upper sleeve 77.

[0062] The first connecting rod 5 and the second connecting rod 6 are both H-shaped. The first connecting rod 5 includes: a first main body 53 in a rectangular block shape, and a pair of first upper extensions 54 and a pair of first lower extensions 55 respectively arranged at opposite ends of the first main body 53. The pair of first upper extensions 54 and the pair of first lower extensions 55 are respectively arranged at intervals. The ends of the pair of first upper extensions 54 away from the first main body 53 are provided with a first upper ring sleeve 541 matching the first upper pipe sleeve 76, and the ends of the pair of first lower extensions 55 away from the first main body 53 are provided with a first lower pipe sleeve 76. The first lower ring sleeve 551 matches the sleeve 13, and a pair of first lower ring sleeves 551 are respectively sleeved on both axial sides of the first lower tube sleeve 13, and a first lower hinge shaft 56 is passed through the pair of first lower ring sleeves 551 and the first lower tube sleeve 13, so that the bottom end of the first connecting rod 5 is hinged to one side of the seat tube 1; at the same time, a pair of first upper ring sleeves 541 are respectively sleeved on both axial sides of the first upper tube sleeve 76, and a first upper hinge shaft 57 is passed through the pair of first upper ring sleeves 541 and the first upper tube sleeve 76, so that the top end of the first connecting rod 5 is hinged to one side of the connecting rod support 7.

[0063] The second connecting rod 6 includes: a second main body 62 in a rectangular block shape, and a pair of second upper extensions 63 and a pair of second lower extensions 64 respectively arranged at opposite ends of the second main body 62, the pair of second upper extensions 63 and the pair of second lower extensions 64 are respectively arranged at intervals, and the ends of the pair of second upper extensions 63 away from the second main body 62 are provided with a second upper ring sleeve 631 matching the second upper sleeve 77, and the ends of the pair of second lower extensions 64 away from the first main body 53 are provided with a second lower sleeve 14 matching the second lower sleeve 14. The ring sleeve 641 and a pair of second lower ring sleeves 641 are respectively sleeved on both axial sides of the second lower tube sleeve 14, and are penetrated through a second lower hinge shaft 65 in a pair of second lower ring sleeves 641 and the second lower tube sleeve 14, so that the bottom end of the second connecting rod 6 is hinged to the other side of the seat tube 1; at the same time, a pair of second upper ring sleeves 631 are respectively sleeved on both axial sides of the second upper tube sleeve 77, and are penetrated through a pair of second upper ring sleeves 631 and the second upper tube sleeve 77 through a second upper hinge shaft 66, so that the top end of the second connecting rod 6 is hinged to the other side of the connecting rod support 7.

[0064] Please also read Figure 1-7 In this embodiment, the bottom end and the top end of the first connecting rod 5 are respectively hinged to the front side of the seat tube 1 and the front side of the connecting rod support 7, and the bottom end and the top end of the second connecting rod 6 are respectively hinged to the rear side of the seat tube 1 and the rear side of the connecting rod support 7.

[0065] In other embodiments (not shown in the figures), the first connecting rod 5 and the second connecting rod 6 are respectively arranged on the front and rear sides of the seat tube 1, and the first connecting rod 5 and the second connecting rod 6 are respectively connected to the left and right sides of the seat tube 1 through a pair of connecting brackets (not shown in the figures), and the first lower tube sleeve 13 and the second lower tube sleeve 14 are arranged on the ends of a pair of connecting brackets extending from the left and right sides of the seat tube 1 to the front and rear sides of the seat tube 1, respectively, away from the seat tube 1.

[0066] Please also read Figure 1-7 In the present embodiment, the first protrusion 51 is a pair of first protrusion seats 511 spaced apart on the first main body 53 of the first connecting rod 5 toward the second connecting rod 6 side, the pair of first protrusion seats 511 are respectively provided with a pair of axial holes 512, and the middle part of the above-mentioned roller 52 is provided with a through hole 521 matching the axial hole 512, the pair of first protrusion seats 511 are sleeved on both sides of the axial direction of the roller 52, and are penetrated through the pair of axial holes 512 and the through hole 521 through a rotating shaft 58, so that the roller 52 can be rotatably hinged to the first protrusion 51 and can rollably act on the top end of the support rod 3.

[0067] Please also read Figure 1-7 In this embodiment, oil storage grooves 571 are provided at both end portions of the first lower hinge shaft 56, the first upper hinge shaft 57, the second lower hinge shaft 65, the second upper hinge shaft 66 and the rotating shaft 58 to form a storage space for storing lubricating oil between the oil storage grooves 571 and the mounting holes 74 thereof, thereby improving the lubricity of the shaft during rotation and prolonging its service life.

[0068] Please also read Figure 1-7 In this embodiment, the second connecting rod 6 is further provided with a second protrusion 61 on the side facing the first connecting rod 5, and the second protrusion 61 is a pair of second protrusion seats 611 arranged at intervals on the side of the second main body 62 of the second connecting rod 6 facing the first connecting rod 5; the pitch-adjustable shock-absorbing structure also includes:

[0069] The limiting protrusion 32 is disposed on the side of the portion of the support rod 3 that extends upward from the joint 2 and faces the second connecting rod 6 , and the size of the limiting protrusion 32 matches the spacing between the pair of second protruding seats 611 .

[0070] When the second connecting rod 6 flips over close to the support rod 3, the limiting protrusion 32 extends between a pair of second protruding seats 611; when the second connecting rod 6 flips over close to the support rod 3 to the extreme position, the second main body 62 of the second connecting rod 6 faces the inner side of the first connecting rod 5 and just abuts against the limiting protrusion 32, so as to limit the maximum flipping angle of the second connecting rod 6 to the above-mentioned extreme position when the second connecting rod 6 flips over close to the support rod 3.

[0071] Please also read Figure 1-7The pitch-adjustable shock-absorbing structure provided by the utility model is provided with a first protrusion 51, a second protrusion 61 and a roller 52 between the first link 5, the second link 6, the link support 7 and the support rod 3 constituting the four-bar linkage, thereby reducing the gap between the first link 5, the second link 6, the link support 7 and the support rod 3, avoiding the safety hazard of the user's fingers being pinched due to inadvertent insertion into the gap.

[0072] Please also read Figure 1-11 In this embodiment, the inclined support surface 71 is provided with a limiting step 711 between the through hole 73 and the mounting hole 74, and the shock absorbing structure further includes:

[0073] The fixed bracket 9 is fixedly mounted on the inclined support surface 71, and the lower end of the fixed bracket 9 abuts against the limiting step 711; a pair of lower grooves 91 are respectively provided on both sides of the fixed bracket 9;

[0074] A pair of upper grooves 84 matching the shape of the lower groove 91 are respectively provided on both sides of the adjustment bracket 8. The pair of upper grooves 84 correspond to the pair of lower grooves 91 to form a pair of clamping sleeves, and the pair of clamping sleeves correspond to the elastic bow structures on both sides of the bottom seat bow for clamping the seat cushion (not shown in the figure).

[0075] Please also read Figure 1-11 In this embodiment, the main body of the fixed bracket 9 is rectangular, and a pair of lower grooves 91 are respectively arranged on both sides of the rectangular main body of the fixed bracket 9, and respectively extend to the outside of the two ends of the rectangular main body of the fixed bracket 9; the main body of the adjusting bracket 8 is saddle-shaped, and the two pairs of upper grooves 84 are respectively arranged at intervals on both sides of the saddle-shaped main body of the adjusting bracket 8, and the two pairs of upper grooves 84 are coaxially arranged with the upper grooves 84 on the same side of the saddle-shaped main body of the adjusting bracket 8, and form a jacket with the lower groove 91 on the same side of the rectangular main body of the fixed bracket 9.

[0076] Please also read Figure 1-11 In this embodiment, the mounting hole 74 passes through the adjustment bracket 8, and the pitch-adjustable shock-absorbing structure further includes:

[0077] The first nut 811 is fixedly installed in the first connecting hole 81 and is connected to the first connecting hole 81 as a whole. The first nut 811 is threadedly connected to the other end of the adjusting screw 75. The second nut 821 is fixedly installed in the second connecting hole 82 and is connected to the second connecting hole 82 as a whole. The end of the fixing screw 83 is inserted into the mounting hole 74 and is threadedly connected to the second nut 821.

[0078] In another embodiment (not shown in the figure), the other end of the adjusting screw 75 can also be directly connected to the first connecting hole 81, and the first nut 811 is directly threadedly connected to the other end of the adjusting screw 75 extending out of the first connecting hole 81 and abuts against the adjusting bracket 8; the end of the fixing screw 83 can also be directly connected to the mounting hole 74, and the second nut 821 is directly threadedly connected to the end of the fixing screw 83 extending out of the mounting hole 74 and abuts against the adjusting bracket 8.

[0079] In other embodiments (not shown in the figures), the other end of the adjusting screw 75 may also be directly threadedly connected to the first connecting hole 81 , and the end of the fixing screw 83 may also be directly threadedly connected to the mounting hole 74 .

[0080] In other embodiments (not shown in the figures), the pitch-adjustable shock-absorbing structure provided by the utility model may not be provided with a fixed bracket 9, but only with the above-mentioned adjustment bracket 8, and the above-mentioned jacket is completely provided on the adjustment bracket 8.

[0081] Please also read Figure 1-11 In this embodiment, the seat tube 1 comprises:

[0082] The tube body 11; the bottom cover 12 is threadedly connected to the bottom end of the tube body 11 and closes the hollow inner side 111 of the tube body 11; the spring 4 abuts between the bottom cover 12 and the support rod 3.

[0083] By rotating the bottom cover 12 to move closer to (upward) or away from (downward) the joint 2 , the distance between the bottom cover 12 and the joint 2 can be adjusted, thereby adjusting the pre-tightening degree of the spring 4 .

[0084] Please also read Figure 1-6 In this embodiment, a transition cone 112 is provided on the outer side of the tube body 11 near the top of the tube body 11, and a sleeve portion 113 whose outer diameter is reduced relative to the bottom of the tube body 11 is formed between the transition cone 112 and the top of the tube body 11; the inner surface shape of the through hole 21 matches the outer surface shape of the sleeve portion 113, and a mounting cone 22 matching the transition cone 112 is provided at the bottom end of the joint 2 connected to the through hole 21;

[0085] The connector 2 is sleeved on the outside of the sleeve portion 113 through the through hole 21 , and is fastened to the top end of the tube body 11 through the matching of the mounting cone surface 22 and the transition cone surface 112 .

[0086] As a preferred embodiment, adhesive is coated at the joint between the installation cone surface 22 and the transition cone surface 112 to improve their fastening properties.

[0087] Please also read Figure 1-6 In this embodiment, the pitch-adjustable shock-absorbing structure further includes:

[0088] The wear-resistant sleeve 15 matches the shape of the hollow inner side 111 of the seat tube 1 . An annular flange 151 is provided around the top of the wear-resistant sleeve 15 . The wear-resistant sleeve 15 is inserted into the hollow inner side 111 and supported on the top of the sleeve 113 by the annular flange 151 .

[0089] As a preferred embodiment, the wear-resistant sleeve 15 is made of rubber, plastic or metal.

[0090] Please also read Figure 1-6 In this embodiment, a lower boss 121 is provided at the top of the bottom cover 12, an upper boss 31 is provided at the bottom end of the support rod 3, and two ends of the spring 4 are respectively correspondingly abutted between the upper boss 31 and the lower boss 121.

[0091] The utility model also provides a shock-absorbing vehicle (not shown in the figure), including a base (not shown in the figure) and a seat cushion (not shown in the figure), and also includes the above-mentioned pitch-adjustable shock-absorbing structure, the seat tube 1 is installed on the base, and the seat cushion is installed on the adjustment bracket 8.

[0092] In this embodiment, the suspension vehicle is a bicycle, a scooter, an electric vehicle or a folding vehicle.

[0093] In one embodiment, the base may also be replaced by a frame.

[0094] In another embodiment, the suspension vehicle may also be a wheelchair.

[0095] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pitch-adjustable shock-absorbing structure, characterized in that: include: Seat tube (1); The joint (2) has a through hole (21) having a shape matching that of the hollow inner side (111) of the seat tube (1); the joint (2) is butt-mounted on the top end of the seat tube (1); and the through hole (21) is connected to the hollow inner side (111); A support rod (3), the bottom end of the support rod (3) abuts against the hollow inner side (111) through a spring (4), and the top end of the support rod (3) extends upward from the joint (2); A first connecting rod (5), the bottom end of which is hinged to one side of the joint (2), a first protrusion (51) is provided on one side of the first connecting rod (5), the first protrusion (51) is hinged to a roller (52), and the roller (52) can rollably act on the top end of the support rod (3); A second connecting rod (6), the bottom end of which is hinged to the other side of the joint (2); A connecting rod support (7), wherein one end of the bottom of the connecting rod support (7) is hinged to the top of the first connecting rod (5), and the other end of the bottom of the connecting rod support (7) is hinged to the top of the second connecting rod (6); the top of the connecting rod support (7) is an inclined supporting surface (71), and a receiving cavity (72) connected to the outside of the connecting rod support (7) is provided in the middle of the connecting rod support (7); a through hole (73) connected to the receiving cavity (72) is provided on the side of the inclined supporting surface (71) with a lower height, and a mounting hole (74) is provided on the other side of the inclined supporting surface (71) with a higher height; an adjusting screw (75), wherein one end of the adjusting screw (75) is provided with an adjusting knob (751), the adjusting knob (751) is arranged in the accommodating cavity (72), and the other end of the adjusting screw (75) passes through the through hole (73) and extends out of the connecting rod support (7); An adjusting bracket (8), wherein a first connecting hole (81) is provided at the front end of the adjusting bracket (8), and the first connecting hole (81) is connected to the other end of the adjusting screw (75); a second connecting hole (82) is provided at the rear end of the adjusting bracket (8), and the rear end of the adjusting bracket (8) is connected to the connecting rod support (7) via a fixing screw (83) passing through the second connecting hole (82) and the mounting hole (74).

2. The pitch-adjustable shock-absorbing structure according to claim 1, characterized in that: The inclined support surface (71) is provided with a limiting step (711) between the through hole (73) and the mounting hole (74), and the shock-absorbing structure further comprises: A fixed bracket (9) is fixedly mounted on the inclined support surface (71) and abuts against the limiting step (711); a pair of lower grooves (91) are respectively provided on two sides of the fixed bracket (9); A pair of upper grooves (84) matching the shape of the lower grooves (91) are respectively provided on both sides of the adjustment bracket (8); the pair of upper grooves (84) and the pair of lower grooves (91) respectively correspond to form a pair of clamping sleeves for clamping the bottom seat bow of the seat cushion.

3. The pitch-adjustable shock-absorbing structure according to claim 1, characterized in that: The seat tube (1) comprises: tube body(11); A bottom cover (12) is threadedly connected to the bottom end of the tube body (11) and closes the hollow inner side (111); The spring (4) abuts between the bottom cover (12) and the support rod (3).

4. The pitch-adjustable shock-absorbing structure according to claim 3, characterized in that: The outer side surface of the tube body (11) is provided with a transition cone surface (112) near the top end of the tube body (11), and a sleeve connection portion (113) with an outer diameter reduced relative to the bottom end of the tube body (11) is formed between the transition cone surface (112) and the top end of the tube body (11); The shape of the through hole (21) matches the outer shape of the sleeve portion (113), and a mounting cone surface (22) matching the transition cone surface (112) is provided at the bottom end of the joint (2) connected to the through hole (21); The joint (2) is sleeved on the outside of the sleeve connection portion (113) through the through hole (21), and is fastened to the top end of the tube body (11) through the matching of the mounting cone surface (22) and the transition cone surface (112).

5. The pitch-adjustable shock-absorbing structure according to claim 4, characterized in that: Also includes: The wear-resistant sleeve (15) matches the shape of the hollow inner side (111), and an annular flange (151) is provided on the circumference of the top end of the wear-resistant sleeve (15). The wear-resistant sleeve (15) is inserted into the hollow inner side (111) and supported on the top end of the sleeve connection portion (113) through the annular flange (151).

6. The pitch-adjustable shock-absorbing structure according to claim 3, characterized in that: The top end of the bottom cover (12) is provided with a lower convex column (121), the bottom end of the support rod (3) is provided with an upper convex column (31), and the two ends of the spring (4) are respectively and correspondingly abutted between the upper convex column (31) and the lower convex column (121).

7. The pitch-adjustable shock-absorbing structure according to any one of claims 1 to 6, characterized in that: The mounting hole (74) passes through the adjustment bracket (8), and the shock-absorbing structure further comprises: A first nut (811) is fixedly installed in the first connecting hole (81), and the first nut (811) is threadedly connected to the other end of the adjusting screw (75); The second nut (821) is fixedly installed in the second connecting hole (82), and the end of the fixing screw (83) is inserted into the mounting hole (74) and then threadedly connected to the second nut (821).

8. The pitch-adjustable shock-absorbing structure according to any one of claims 1 to 6, characterized in that: Also includes: A limiting protrusion (32) is arranged on the side of the portion of the support rod (3) that extends upward from the joint (2) and faces the second connecting rod (6) so as to limit the turning angle of the second connecting rod (6) when the second connecting rod (6) turns over close to the support rod (3).

9. A shock-absorbing vehicle, comprising a base and a seat cushion, characterized in that: It also comprises a pitch-adjustable shock-absorbing structure as claimed in any one of claims 1 to 8, wherein the seat tube (1) is mounted on the base, and the seat cushion is mounted on the adjustment bracket (8).

10. The suspension vehicle according to claim 9, characterized in that: The shock-absorbing vehicle is a bicycle, a scooter, an electric vehicle or a folding vehicle.

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