Folding scooter frame

Abstract

The invention discloses a folding scooter frame which comprises a scooter head and a seat. The two main beams are symmetrically hinged to the bottom of the seat, the rear wheel frame is connected with the bottoms of the two main beams, the middle of the auxiliary beam is hinged to the main beams in a crossed mode, the pedal frame is hinged between the auxiliary beam and the bicycle head, the pull rod is located below the pedal frame, one end of the pull rod is hinged to the bicycle head, and the rear bicycle frame is hinged between the pull rod and the rear wheel frame. The backrest is rotationally connected with the seat, the linkage mechanism is in linkage with the two auxiliary beams to drive the backrest to be folded towards the seat, the first lock pin is fixedly installed on the inner side of the pull rod, the first lock hook is matched with the first lock pin to achieve folding and unlocking of the frame, and the first spring is fixedly connected between the bottom of the pedal frame and the first lock hook. Through the arrangement of the linkage mechanism, the first lock pin and the third lock pin, frame folding, backrest folding and folding state locking can be automatically achieved by upwards lifting the first handle, and a user does not need to independently and manually fold the backrest after folding the frame.

Description

Technical Field

[0001] The invention relates to the technical field of folding vehicles, and in particular to a folding scooter frame. Background Art

[0002] There are two types of folding scooters currently available on the market: manual folding and electric folding. No matter which folding method is used, after the frame is folded, the user needs to manually fold the backrest, which is not convenient for the elderly to operate. In addition, the manually folded backrest will become loose after long-term use, and the backrest of the scooter cannot be tightly attached to the seat after being folded. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a foldable scooter frame which can fold the backrest in conjunction with the frame and prevent the backrest from loosening.

[0004] Technical solution: The present invention discloses a foldable scooter frame, including a front and a seat, and also includes two main beams that are symmetrical and hinged at the bottom of the seat, a rear wheel frame connected to the bottom of the two main beams, a secondary beam cross-hinged with the main beams in the middle, a pedal frame hinged between the secondary beam and the front, a pull rod located below the pedal frame and hinged to the front at one end, a rear frame hinged between the pull rod and the rear wheel frame and hinged to the pedal frame at the head, a backrest rotatably connected to the seat, a linkage mechanism that drives the backrest to fold toward the seat in linkage with the two secondary beams, a first locking pin fixedly installed on the inner side of the pull rod, a first locking hook that cooperates with the first locking pin to achieve frame folding unlocking and is rotatably installed on the pedal frame, and a first spring fixedly connected between the bottom of the pedal frame and the first locking hook; the linkage mechanism includes a locking mechanism for locking the backrest in an unfolded state and an unlocking mechanism for releasing the backrest locking state and triggering the backrest to fold.

[0005] Furthermore, the locking mechanism includes a vertical slot plate fixedly mounted on the rear side of the seat and rotatably plugged with the connecting part of the backrest, a first connecting shaft and a second connecting shaft fixedly connected to the inner wall of the notch of the vertical slot plate, a guide wheel arranged on the first connecting shaft, a second locking hook and a torsion spring arranged on the first connecting shaft, a wire pulley arranged on the outer periphery of the second connecting shaft, a second locking pin that cooperates with the second locking hook to lock the backrest and is fixedly mounted on the connecting part of the backrest, a second spring fixedly connected to the bottom of the seat at one end, and a pulling wire fixedly connected to the other end of the second spring, the other end of the pulling wire being fixedly connected to the wire pulley after being wrapped around the guide wheel, the connecting part of the backrest being rotatably mounted on the outer periphery of the second connecting shaft and fixedly connected to the wire pulley, one end of the torsion spring abuts against the seat and the other end abuts against the second locking hook; the unlocking mechanism includes an extension rod hinged to the top end of the subbeam, a cylinder fixedly connected to the two extension rods, and a cam fixedly connected to the outer periphery of the cylinder for squeezing and triggering the second locking hook, and the top of the extension rod is hinged to the protrusion at the bottom of the seat.

[0006] Furthermore, a third locking pin is fixedly connected to the inner side of the auxiliary beam, and a third locking hook is rotatably installed on the inner side of the rear frame and cooperates with the third locking pin to lock the frame in a folded state.

[0007] Furthermore, armrests are symmetrically arranged on both sides of the seat, auxiliary rods are integrally arranged at the bottom of the armrests, and both ends of the cylinder are fixedly connected to the two auxiliary rods respectively.

[0008] Furthermore, the top of the main beam is hinged to the seat to form an L hinge point, the top of the extension rod is hinged to the seat to form an M hinge point, and the top of the sub-beam is hinged to the bottom end of the extension rod to form a K hinge point. When the angle θ formed by the LM line and the KM line is 5°<θ<55°, the extension rod drives the cam on the cylinder to squeeze and trigger the second lock hook to rotate counterclockwise to complete unlocking.

[0009] Furthermore, the front of the vehicle includes two symmetrically arranged front wheels, a front cross frame fixedly connected to the central axes of the two front wheels, a retractable support frame fixedly connected to the front cross frame, an annular handle fixedly connected to the top of the support frame, and a control console detachably mounted on the inner side of the annular handle through a connecting piece.

[0010] Furthermore, one end of the connecting piece is hinged to the bottom of the console, the connecting piece is sleeved on the outer circumference of the ring handle, and the other end of the connecting piece is provided with a fastener for fixing it to the ring handle, and the fastener is threadedly connected to the bottom of the console, a lighting lamp is fixedly connected to the ring handle, and a break for accommodating the console is provided in the middle of the ring handle near the seat side.

[0011] Furthermore, the console includes a controller, an upper shell and a lower shell installed outside the controller, a display screen embedded in the top of the upper shell, a charging port arranged on both sides of the upper shell, an operating knob and a horn button arranged on both sides of the upper shell, an operating rod fixedly connected to the bottom of the lower shell for adjusting the speed, and a switch key installed on one side of the lower shell. The display screen, charging port, operating knob, horn button, switch key and operating rod are electrically connected to the controller respectively, and the operating knob is located at the fracture of the ring handle and is coaxially arranged with the lateral part of the ring handle.

[0012] Furthermore, a storage mechanism is provided on the side of the main beam, and the storage mechanism includes a bottom shell, a mounting part connected between the bottom shell and the main beam, a top shell that cooperates with the bottom shell to form a storage space and is connected to the bottom shell, a base fixedly installed inside the bottom shell, a connector installed on one side of the base, a protective cover installed on the top of the base through a tension spring, and a battery that is detachably installed in the bottom shell and matches the connector.

[0013] Furthermore, an elliptical fixing ring is provided on the side of the battery away from the plug-in component, and a limiting mechanism is provided inside the bottom shell for cooperating with the fixing ring to fix the battery. The limiting mechanism includes a protective tube fixedly connected to the inner wall of the bottom shell, a third spring fixedly connected to the bottom shell and located in the protective tube, and a knob fixedly connected to the top of the third spring, and the movable part of the knob is provided with an elliptical limiting plate that matches the fixing ring and is used to press and fix the battery.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention, through the setting of the linkage mechanism, the first locking pin and the third locking pin, can automatically realize the folding of the frame, the folding of the backrest and the locking of the folded state by pulling up the first handle, and the user does not need to manually fold the backrest separately after folding the frame; and the setting of the second locking hook and the second locking pin can maintain the stability of the backrest and prevent the backrest from loosening after multiple foldings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention when it is unfolded;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention when the storage mechanism is removed and unfolded;

[0017] Figure 3 This is a schematic diagram of the structure of the present invention in a disassembled state with the storage mechanism removed;

[0018] Figure 4 It is a schematic diagram of the structure of the present invention when folded;

[0019] Figure 5 It is a structural schematic diagram of the linkage mechanism of the present invention;

[0020] Figure 6 is a schematic structural diagram of the first connecting shaft of the present invention;

[0021] Figure 7 It is a schematic structural diagram of the first locking hook of the present invention;

[0022] Figure 8 It is a schematic diagram of the hinge point structure of the present invention;

[0023] Fig. 9 For the present invention Figure 8 Schematic diagram of the structure of KM rotation;

[0024] Fig.10 It is a schematic diagram of the motion structure of the first locking hook during folding of the present invention;

[0025] Fig.11 It is a structural schematic diagram of the folding process of the present invention;

[0026] Fig.12It is a structural schematic diagram of the prematurely triggered unlocking mechanism of the present invention;

[0027] Fig.13 It is a structural schematic diagram of the unlocking mechanism triggered too late in the present invention;

[0028] Fig.14 This is a schematic diagram of the structure of the unlocking mechanism triggered at the right time of the present invention;

[0029] Fig.15 It is a schematic diagram of the structure of the third locking hook and the third locking pin being locked when the present invention is folded;

[0030] Fig.16 This is a schematic diagram of the motion structure of the third handle when the present invention is unfolded;

[0031] Fig.17 It is a schematic diagram of the motion structure of the third locking hook when the present invention is deployed;

[0032] Fig.18 It is a schematic structural diagram of the annular handle and the console of the present invention;

[0033] Fig.19 Another schematic diagram of the structure of the ring handle and the console of the present invention;

[0034] Fig. 20 It is a schematic structural diagram of the annular handle and the connecting member of the present invention;

[0035] Fig.21 It is a schematic diagram of the storage mechanism of the present invention;

[0036] Fig. 22 It is a schematic diagram of the structure of the bottom shell and the top shell of the present invention;

[0037] Fig.23 It is a schematic structural diagram of the bottom shell and the battery of the present invention. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0039] Example

[0040] The foldable scooter frame of the present invention is as follows: Figures 1 to 4As shown, it includes a front part 1, a seat 2, two armrests 3, a linkage mechanism 4, a backrest 5, two main beams 6, a rear wheel frame 7, two sub-beams 8, a pedal frame 9, two tie rods 10 and a rear frame 11. The backrest 5 is rotatably connected to the seat 2, the two main beams 6 are symmetrically arranged at the bottom of the seat 2 for support, and the main beam 6 is rotatably connected to the seat 2, the other end of the main beam 6 is connected to the rear wheel frame 7, the two sub-beams 8 are symmetrically arranged below the seat 2, and the sub-beams 8 are cross-arranged with the main beam 6, the side of the main beam 6 is fixedly connected with a connecting block 30, the connecting block 30 is located on the outside of the sub-beam 8, and the connecting block 30 is rotatably connected to the sub-beam 8 through a pin shaft, and the bottom of the sub-beam 8 is connected to the rear of the pedal frame 9. The front end of the pedal frame 9 is rotatably connected to the front of the vehicle 1, the two pull rods 10 are located below the pedal frame 9, and the front ends of the two pull rods 10 are rotatably connected to the front of the vehicle 1, the two pull rods 10, the rear frame 11 and the rear wheel frame 7 are arranged in sequence, and the two adjacent ones are rotatably connected, and a protrusion 31 is provided at the bottom of the pedal frame 9, the protrusion 31 is located on the inner side of the rear frame 11, and the protrusion 31 is rotatably connected to the rear frame 11 through a pin shaft; the two armrests 3 are symmetrically arranged on both sides of the seat 2, and the bottom of the armrests 3 is fixedly connected with an auxiliary rod 15, the linkage mechanism 4 is located at the bottom of the seat 2 and cooperates with the subbeam 8, and the backrest 5 is triggered by the linkage mechanism 4 to fold toward the seat 2.

[0041] like Figure 7 As shown, a first lock hook 13 is rotatably installed on the inner side of the pedal frame 9, and a limit block 43 for limiting the rotation angle of the first lock hook 13 is fixedly connected to the bottom of the cross beam of the pedal frame 9, and a first lock pin 12 is fixedly connected to the inner side of the pull rod 10, and a lock groove cooperating with the first lock pin 12 is provided at one end of the first lock hook 13, and a slot cooperating with the limit block 43 is provided at the other end of the first lock hook 13, and the transverse part of the limit block 43 is located inside the slot, and a first spring 14 is connected between the bottom of the pedal frame 9 and the first lock hook 13. Under the action of the first spring 14, the first lock hook 13 hooks the first lock pin 12 and maintains this state, so that the frame as a whole is in an expanded state. When the vehicle frame is in the unfolded state, the inner wall of one side of the slot of the first lock hook 13 abuts against the limiting block 43 (i.e. in normal use state), a first handle 39 is fixedly connected between the tops of the two first lock hooks 13, and the setting of the first handle 39 is convenient for the user to adjust the first lock hook 13; when it is necessary to fold, the first handle 39 is pulled upward to make the first lock hook 13 disengage from the first lock pin 12 to release the lock, and the first handle 39 is continued to be pulled upward to achieve overall folding. When the vehicle frame needs to be unfolded, after the vehicle frame is unfolded, the first handle 39 is pressed downward to make the first lock hook 13 hook the first lock pin 12, and the vehicle frame can be locked in the unfolded state. At this time, the inner wall of the other side of the slot of the first lock hook 13 abuts against the limiting block 43.

[0042] like Figure 2 , Figure 5 and Figure 6As shown, the linkage mechanism 4 includes a locking mechanism for locking the backrest 5 in the unfolded state and an unlocking mechanism for releasing the locked state of the backrest 5 and triggering the folding of the backrest 5, wherein the locking mechanism includes a vertical slot plate 20, a first connecting shaft 21, a guide wheel 22, a second lock hook 23, a torsion spring 24, a second spring 25, a pull wire 26, a second lock pin 27, a wire wheel 41 and a second connecting shaft 42, the vertical slot plate 20 is fixedly connected to the rear side of the seat 2, the connecting portion of the backrest 5 is inserted into the interior of the vertical slot plate 20 and rotatably connected thereto, the first connecting shaft 21 and the second connecting shaft 42 are respectively fixedly installed in the notched grooves of the vertical slot plate 20, the guide wheel 22, the second lock hook 23 and the torsion spring 24 are sequentially sleeved on the outer periphery of the first connecting shaft 21, and the connecting portion of the backrest 5 and the wire wheel 42 are sleeved On the outer periphery of the second connecting shaft 42, the connecting part of the backrest 5 is fixedly connected to the wire wheel 42, specifically, the connecting part of the backrest 5 and the wire wheel 42 are connected through the fixed shaft 48; the second locking pin 27 is fixedly installed on the connecting part of the backrest 5, and the second locking hook 23 cooperates with the second locking pin 27, one end of the second spring 25 is fixedly connected to the bottom of the seat 2, the other end of the second spring 25 is fixedly connected to the pull wire 26, and the end of the pull wire 26 away from the second spring 25 passes through the guide wheel 22 and is fixedly connected to the wire wheel 42, one end of the torsion spring 24 rests on the seat 2, and the other end of the torsion spring 24 rests on the second locking hook 23. When the backrest 5 is unfolded, the setting of the torsion spring 24 makes the second locking hook 23 and the second locking pin 27 locked, which is conducive to maintaining the reliability of the backrest 5 when in use. The unlocking mechanism includes a cylinder 16, an extension rod 17 and a cam 18. A protrusion is provided at the bottom of the seat 2, which is inserted into the top of the extension rod 17 and rotatably connected thereto. The top of the subbeam 8 is rotatably connected to the bottom of the extension rod 17. The cylinder 16 is fixedly connected to the two extension rods 17, and the two ends of the cylinder 16 are respectively fixedly connected to the two auxiliary rods 15. The two cams 18 are fixedly connected to the cylinder 16, and the two cams 18 are symmetrically arranged about the center of the cylinder 16. When the cylinder 16 drives the cam 18 to rotate, the cam 18 squeezes the second lock hook 23 to make it cooperate with the second lock pin 27; preferably, a rubber wheel 19 is installed at the top of the cam 18 to reduce the friction between it and the second lock hook 23.

[0043] like Figure 8As shown, the front end of the vehicle 1 is hinged to the front end of the pedal frame 9 to form a hinge point A, the bottom of the pedal frame 9 is hinged to the front end of the rear frame 11 to form a hinge point B, the tail end of the pull rod 10 is hinged to the inner side of the rear frame 11 to form a hinge point C, the head end of the pull rod 10 is hinged to the front end 1 to form a hinge point D, AB, BC, CD, DA constitute a four-link 1 connected end to end, preferably, AB+BC>AD+DC, AB and BC form an angle α, and 160°<α<190°; the tail end of the pedal frame 9 is hinged to the bottom end of the auxiliary beam 8 to form a hinge point E, the middle part of the auxiliary beam 8 is hinged to the main beam 6 to form a hinge point H, the tail end of the rear frame 11 is hinged to the rear wheel frame 7 to form a hinge point F, BE, EH, HF, FB constitute a four-link 2 connected end to end, the four-link 1 and the four-link 2 are linked through ABE (pedal frame 9), preferably, BF and BE An angle β is formed, and β<20°; the top of the main beam 6 is hinged to the seat 2 to form an L hinge point, the top of the auxiliary beam 8 is hinged to the bottom end of the extension rod 17 to form a K hinge point, the top of the extension rod 17 is hinged to the seat 2 to form an M hinge point, LH, HK, KM, and ML constitute a four-link 3 connected end to end, the four-link 2 and the four-link 3 are linked through EHK (auxiliary beam 8) and LHF (main beam 6), preferably, HK and KM form an angle γ, and 160°<α<190°; the point where the top of the cam 18 contacts the second locking hook 23 is set as the N contact point, and the second locking hook 23 intersects with the first connecting shaft 21 to form an O connection point; the four-link 1 folds and links the four-link 2 and the four-link 3, and when the frame starts to fold to half of the folding, KM (extension rod 17) drives the cylinder 16 to rotate so that the second locking hook 23 rotates counterclockwise around the O connection point.

[0044] like Fig. 9 He Ru Fig.11 As shown, during the whole process from the unfolded state to the folded state, LM and KM form an angle θ, and the range of the angle θ during the folding process is: 0°≤θ≤60°. During the folding process of the frame, the auxiliary beam 8 rotates to trigger the unlocking mechanism, and during the folding process, the seat 2 as a whole rotates clockwise; Fig.12 As shown, if the unlocking mechanism is triggered too early, the backrest 5 is basically in a vertical state (i.e., basically in an unfolded state). At this time, when the backrest 5 is folded toward the seat 2, there is no need to overcome the gravity of the backrest 5 itself. The backrest 5 will be folded at a very fast speed, which will generate a certain amount of noise, such as when θ=5°; Fig.13 As shown, if the unlocking mechanism is triggered too late, as the seat 2 frame folds and rotates clockwise, the seat 2 is close to a vertical state, the backrest 5 is perpendicular to the seat 2, and the backrest 5 is close to a horizontal state. After unlocking, the backrest 5 needs to overcome its own gravity when folding toward the seat 2. The linkage mechanism 4 with the same elastic force will not be able to complete the folding of the backrest 5, such as when θ=55°. Fig.14As shown, when θ = 30°, it is a suitable unlocking trigger timing. Therefore, preferably, the trigger timing of the unlocking mechanism is 5° < θ < 55°.

[0045] The entire frame is linked and folded. The connecting rod KM (extension rod 17) needs to rotate 60° from the frame unfolded state to the final frame folded state. In this embodiment, when the connecting rod KM (extension rod 17) rotates 20° (θ = 20°), unlocking is achieved, that is, the cam 18 (or rubber wheel 19) rotates from point N1 to point N2, and then the second locking hook 23 rotates 15° (the angle of rotation of the second locking hook 23 is defined as γ, and at this time γ = 15°), and the unlocking is completed. The second locking hook 23 needs to rotate 15° to disengage the second locking pin 27 of the backrest 5 from the second locking hook 23, and the backrest 5 folds and retracts towards the seat 2 under the action of the second spring 25.

[0046] When the rotation angle θ of the connecting rod KM (extension rod 17) is 1.5 to 2.5 times the unlocking angle γ, define I = θ / γ = ON / MN, that is, when 1.5 < I < 2.5, the linkage mechanism 4 triggers the backrest 5 to rotate.

[0047] As Figure 2 shown, the front end 1 includes front wheels 32, a front cross frame 33, a support frame 34, a connecting member 44, a ring handle 35, and a console 36. There are two front wheels 32 in total, and the two front wheels 32 are respectively fixedly connected to both ends of the front cross frame 33. The support frame 34 is fixedly connected to the central position of the front cross frame 33. The ring handle 35 is fixedly connected to the top of the support frame 34. The console 36 is detachably installed inside the ring handle 35 through the connecting member 44.

[0048] The rear wheel frame 7 includes a rear cross frame 37 and rear wheels 38 installed at both ends of the rear cross frame 37, and the rear frame 11 is rotatably connected to the rear cross frame 37. Preferably, the distance between the two front wheels 32 is less than the distance between the two rear wheels 38. The arrangement of the two front wheels 32 of the front end 1 is beneficial to improving the overall stability during use while ensuring the overall flexibility of use compared with a single wheel of the existing frame.

[0049] A third locking pin 28 is fixedly connected to the inner side of the auxiliary beam 8, and a third locking hook 29 cooperating with the third locking pin 28 is rotatably installed on the inner side of the rear frame 11. When the frame is folded, the third locking hook 29 hooks the third locking pin 28 to lock the frame in the folded state and prevent the frame from unfolding. Preferably, a third handle 40 is fixedly connected to one side of each of the two third locking hooks 29, and the arrangement of the third handle facilitates the user to control the third locking hook 29.

[0050] As Figure 3 and Fig.17As shown, one end of the connecting member 44 is hinged to the bottom of the console 36, and the connecting member 44 is sleeved on the outer periphery of the ring handle 35, and the other end of the connecting member 44 is provided with a fastener 45 for fixing it on the ring handle 35, and the fastener 45 is threadedly connected to the bottom of the console 36, and the middle part of the ring handle 35 close to the seat 2 is provided with a break for accommodating the console 36. In actual use, the console 36 can be rotated by loosening the fastener 45, and after the console 36 is rotated to a comfortable tilt angle for the user, the fastener 45 is rotated again to fix the console 36 at the current position; the console 36 is used to control the overall operation, and the support frame 34 is set as a retractable structure, which is convenient for the user to adjust the height of the console 36 according to his own height on the one hand, and can shrink the height when the whole is folded, further reducing the space occupied by the whole; a lighting lamp 46 is fixedly connected to the ring handle 35, and the lighting lamp 46 is located in the groove at the bottom of the console 36; the lighting lamp 46 and the console 36 are set independently of each other, and the console 36 and the ring handle 35 are detachably connected, so that the console 36 can be disassembled and repaired from the frame.

[0051] like Figure 18 to Figure 20As shown, the console 36 includes a controller, an upper shell 361 and a lower shell 362 installed outside the controller, a display screen 363 embedded in the top of the upper shell 361, a charging port 364 arranged on both sides of the upper shell 361, an operating knob 365 and a horn button 366 arranged on both sides of the upper shell 361, an operating rod 367 fixedly connected to the bottom of the lower shell 362 for adjusting the speed, and a switch key 368 installed on one side of the lower shell 362, the operating knob 365 is used to switch the gear of the scooter, the operating knob 365 is located at the break of the ring handle 35 and is coaxially arranged with the lateral part of the ring handle 35, the display screen 363, the charging port 364, the operating knob 365, the horn button 366, the switch key 368 and the operating rod 367 are electrically connected to the controller respectively. The charging port 364 includes a battery charging port and other charging ports of the frame, and the other charging ports are preferably USB charging ports, which are convenient for users to charge mobile phones and other electronic products. The horns and speed control buttons or other function buttons of existing scooters are independently installed on both sides of the handlebars, and the instruments of different instrument models are not interchangeable. However, the control components of the frame of the present invention are integrated and installed on the console 36, which is convenient for the production and manufacture of the console 36 and the installation of the console 36 on the frame. The console 36 has strong applicability and can be applied to different frames. The display screen 363 provides real-time speed information, speed gear, power, vehicle fault alarm, electromagnetic brake alarm, and reserves an interface for adding display content later; the horn button 366 is located on the upper shell 361, and the position is obvious and will not be touched by mistake; the display screen 363, charging port 364, operating knob 365 and horn button 366 are concentrated on the upper shell 361 to form a modular structure. Such a layout is more conducive to production and assembly; the switch key 368 is located on the side of the console 36 close to the user, which is more convenient for the user to operate during driving, and the gear switching when operating the switch key 368 does not affect the instrument. Other functional operations; a wire entry hole and a wire outlet hole are set below the lower shell 362, and the hole position is set for wire management, which is convenient for connecting the communication wire harness and the lighting lamp 46 connecting wire or other wire harnesses, and is convenient for line organization. It is simple and practical; the operating rod 367 is located inside the handle ring handle 35, and a non-zero angle is formed between the operating rod 367 and the ring handle 35, that is, the operating rod 367 and the handle form an angle of zero to ninety degrees. When the user touches the ring handle 35, the operating rod 367 can be easily operated, and the angle limit between the operating rod 367 and the ring handle 35 is beneficial to reduce the possibility of device damage.

[0052] like Figure 21 to Figure 23As shown, the side of the main beam 6 is detachably connected with a storage mechanism 47, which includes a bottom shell 471, a mounting member 472, a top shell 473 and a battery 476. The bottom shell 471 and the top shell 473 are connected by buckles or zippers, and the bottom shell 471 and the top shell 473 cooperate to form a storage space; the mounting member 472 is installed between the main beam 6 and the bottom shell 471, and the mounting positions of the mounting member 472 and the bottom shell 471 are adjusted, so that the bottom shell 471 can be installed on racks of different models, which is convenient for practical use; The battery 476 is detachably mounted in the bottom shell 471, and a base 474 is fixedly mounted inside the bottom shell 471. A connector electrically connected to the console 36 of the mobility scooter is mounted on one side of the base 474. When the battery 476 is installed in the bottom shell 471 and connected to the connector, the battery 476 can be used as a backup power source to provide power to the mobility scooter; preferably, a protective cover 475 is installed on the top of the base 474 through a tension spring. When the battery 476 is not equipped, the provision of the protective cover 475 is beneficial to protecting the connector.

[0053] Preferably, an elliptical fixing ring 477 is provided on the side of the battery 476 away from the connector, and a limiting mechanism is provided inside the bottom shell 471 to cooperate with the fixing ring 477 to fix the battery 476. The limiting mechanism includes a protective tube 478 fixedly connected to the inner wall of the bottom shell 471, a third spring fixedly connected to the bottom shell 471 and located in the protective tube 478, and a knob 479 fixedly connected to the top of the third spring. The movable part of the knob 479 is provided with a fixing ring 477 that matches the fixing ring 477 and is used to press the battery 476. An elliptical limit plate for fixing the battery 476; when equipping the battery 476, pull upward and turn the knob 479 so that the limit plate of the knob 479 is aligned with the position of the fixing ring 477, thereby allowing the fixing ring 477 to pass through the knob 479. After the battery 476 is installed, release the knob 479, and then turn the knob 479 in the opposite direction so that the limit plate and the fixing ring 477 are vertically arranged, thereby allowing the limit plate of the knob 479 to press on the fixing ring 477 to limit and fix the battery 476.

[0054] Working process: When folding for storage, the folding process diagram is as follows Fig.11 As shown, the first handle 39 is pulled upward to disengage the first locking hook 13 from the first locking pin 12. Fig.10As shown, the first lock hook 13 moves from position 1 to position 2, unlocking the entire frame; continue to pull the first handle 39 upward, and when the frame is folded in half, the subbeam 8 drives the extension rod 17 to rotate counterclockwise, causing the cylinder 16 to rotate counterclockwise, thereby causing the rubber wheel 19 to rotate counterclockwise and squeeze the second lock hook 23, so that the other end of the second lock hook 23 is disengaged from the second lock pin 27, and the backrest 5 is unlocked. Under the action of the second spring 25, the pull wire 26 drives the backrest 5 to fold toward the seat 2, and the extension rod 17 rotates counterclockwise while driving the auxiliary rod 15 to rotate, thereby causing the armrest 3 to fold together with the frame; continue to pull the first handle 39 upward, the armrests 3 on both sides are tightened, and the third lock pin 28 on the subbeam 8 slides into the lock groove of the third lock pin 28 along the inclined surface of the third lock pin 28, so that the entire frame structure is folded and locked, as shown in FIG. Fig.15 shown.

[0055] When the frame is unfolded, the third handle 40 is pressed to disengage the third locking hook 29 from the third locking pin 28. Fig.16 As shown, the third handle 40 moves from position 1 to position 2, as shown in FIG. Fig.15 As shown, the third locking pin 28 moves from position 1 to position 2, and the frame is unlocked; then the first handle 39 is held, and the frame is naturally unfolded under the action of its own gravity, and the first locking pin 12 on the inner side of the pull rod 10 contacts the inclined surface of the first locking hook 13, and the first locking hook 13 rotates clockwise, and the first locking pin 12 slides into the locking groove of the first locking hook 13, and the frame is unfolded and locked. After the frame is unfolded, the backrest 5 is manually rotated clockwise, and the second locking pin 27 on the backrest 5 slides into the locking groove of the second locking hook 23. The setting of the torsion spring 24 ensures that the second locking pin 27 is always in the locking groove of the second locking hook 23, so that the backrest 5 is in a stable state.

Claims

1. A foldable scooter frame, comprising a scooter head (1) and a seat (2), characterized in that: The vehicle also comprises two main beams (6) which are symmetrical and hinged at the bottom of the seat (2), a rear wheel frame (7) connected to the bottom of the two main beams (6), a secondary beam (8) which is cross-hinged with the main beam (6) in the middle, a pedal frame (9) which is hinged between the secondary beam (8) and the front of the vehicle (1), a pull rod (10) which is located below the pedal frame (9) and one end of which is hinged to the front of the vehicle (1), a rear frame (11) which is hinged between the pull rod (10) and the rear wheel frame (7) and the head of which is hinged to the pedal frame (9), a backrest (5) which is rotatably connected to the seat (2), and a drive mechanism which is linked to the two secondary beams (8). A linkage mechanism (4) for folding a movable backrest (5) toward a seat (2), a first locking pin (12) fixedly mounted on the inner side of a pull rod (10), a first locking hook (13) rotatably mounted on a pedal frame (9) and cooperating with the first locking pin (12) to realize folding and unlocking of a vehicle frame, and a first spring (14) fixedly connected between the bottom of the pedal frame (9) and the first locking hook (13); the linkage mechanism (4) comprises a locking mechanism for locking the backrest (5) in an unfolded state and an unlocking mechanism for releasing the locking state of the backrest (5) and triggering the folding of the backrest (5).

2. The foldable scooter frame according to claim 1, characterized in that: The locking mechanism comprises a vertical slot plate (20) fixedly mounted on the rear side of the seat (2) and rotatably plugged with a connecting portion of the backrest (5), a first connecting shaft (21) and a second connecting shaft (42) fixedly connected to the inner wall of the notch of the vertical slot plate (20), a guide wheel (22) arranged on the first connecting shaft (21), a second locking hook (23) and a torsion spring (24) arranged on the first connecting shaft (21), a wire wheel (41) arranged on the outer periphery of the second connecting shaft (42), a second locking pin (27) which cooperates with the second locking hook (23) to lock the backrest (5) and is fixedly mounted on the connecting portion of the backrest (5), a second spring (25) with one end fixedly connected to the bottom of the seat (2), and a second spring (25) which is connected to the second spring (25). The other end of the pull wire (26) is fixedly connected, the other end of the pull wire (26) is wound around the guide wheel (22) and then fixedly connected to the wire wheel (41), the connecting part of the backrest (5) is rotatably mounted on the outer periphery of the second connecting shaft (42) and fixedly connected to the wire wheel (41), one end of the torsion spring (24) abuts against the seat (2) and the other end abuts against the second locking hook (23); the unlocking mechanism comprises an extension rod (17) hinged to the top of the auxiliary beam (8), a cylinder (16) fixedly connected to the two extension rods (17) and a cam (18) fixedly connected to the outer periphery of the cylinder (16) for squeezing and triggering the second locking hook (23), the top of the extension rod (17) is hinged to the protrusion at the bottom of the seat (2).

3. The foldable scooter frame according to claim 2, characterized in that: A third locking pin (28) is fixedly connected to the inner side of the auxiliary beam (8), and a third locking hook (29) is rotatably mounted on the inner side of the rear frame (11) and cooperates with the third locking pin (28) to lock the frame in a folded state.

4. The foldable scooter frame according to claim 3, characterized in that: Armrests (3) are symmetrically arranged on both sides of the seat (2), auxiliary rods (15) are integrally arranged at the bottom of the armrests (3), and both ends of the cylinder (16) are respectively fixedly connected to the two auxiliary rods (15).

5. The foldable scooter frame according to claim 4, characterized in that: The top end of the main beam (6) is hinged to the seat (2) to form an L hinge point, the top end of the extension rod (17) is hinged to the seat (2) to form an M hinge point, and the top end of the auxiliary beam (8) is hinged to the bottom end of the extension rod (17) to form a K hinge point. When the angle θ formed by the LM line and the KM line is 5°<θ<55°, the extension rod (17) drives the cam (18) on the cylinder (16) to squeeze and trigger the second lock hook (23) to rotate counterclockwise to complete unlocking.

6. The foldable scooter frame according to claim 1, characterized in that: The front of the vehicle (1) comprises two symmetrically arranged front wheels (32), a front cross frame (33) fixedly connected to the central axes of the two front wheels (32), a retractable support frame (34) fixedly connected to the front cross frame (33), an annular handle (35) fixedly connected to the top of the support frame (34), and a control console (36) detachably mounted on the inner side of the annular handle (35) via a connecting piece (44).

7. The foldable scooter frame according to claim 6, characterized in that: One end of the connecting piece (44) is hinged to the bottom of the console (36), the connecting piece (44) is sleeved on the outer periphery of the annular handle (35), and the other end of the connecting piece (44) is provided with a fastener (45) for fixing it to the annular handle (35), and the fastener (45) is threadedly connected to the bottom of the console (36), the annular handle (35) is fixedly connected to a lighting lamp (46), and a break for accommodating the console (36) is provided in the middle of the annular handle (35) close to the seat (2).

8. The foldable scooter frame according to claim 7, characterized in that: The console (36) comprises a controller, an upper shell (361) and a lower shell (362) installed outside the controller, a display screen (363) mounted on the top of the upper shell (361), a charging port (364) arranged on both sides of the upper shell (361), an operating knob (365) and a horn button (366) arranged on both sides of the upper shell (361), an operating rod (367) fixedly connected to the bottom of the lower shell (362) for adjusting the speed, and a switch key (368) installed on one side of the lower shell (362). The display screen (363), the charging port (364), the operating knob (365), the horn button (366), the switch key (368) and the operating rod (367) are electrically connected to the controller respectively. The operating knob (365) is located at the break of the annular handle (35) and is coaxially arranged with the transverse part of the annular handle (35).

9. The foldable scooter frame according to claim 1, characterized in that: A storage mechanism (47) is provided on the side of the main beam (6), and the storage mechanism (47) comprises a bottom shell (471), a mounting member (472) connected between the bottom shell (471) and the main beam (6), a top shell (473) which cooperates with the bottom shell (471) to form a storage space and is connected to the bottom shell (471), a base (474) fixedly mounted inside the bottom shell (471), a plug-in member mounted on one side of the base (474), a protective cover (475) mounted on the top of the base (474) via a tension spring, and a battery (476) which is detachably mounted in the bottom shell (471) and matches the plug-in member.

10. The foldable scooter frame according to claim 9, characterized in that: An elliptical fixing ring (477) is arranged on the side of the battery (476) away from the plug-in component, and a limiting mechanism is arranged inside the bottom shell (471) to cooperate with the fixing ring (477) to fix the battery (476). The limiting mechanism includes a protective tube (478) fixedly connected to the inner wall of the bottom shell (471), a third spring fixedly connected to the bottom shell (471) and located in the protective tube (478), and a knob (479) fixedly connected to the top of the third spring. The movable part of the knob (479) is provided with an elliptical limiting plate that matches the fixing ring (477) and is used to press and fix the battery (476).

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