A folding scooter frame

Abstract

The application discloses a folding scooter frame, which comprises a head and a seat, and further comprises two main beams which are symmetrical and hinged at the bottom of the seat, a rear wheel frame connected with the bottom of the two main beams, a sub-beam which is hingedly connected with the main beam at the middle part, a pedal frame which is hingedly connected between the sub-beam and the head, a pull rod which is located below the pedal frame and hingedly connected with the head at one end, a rear frame which is hingedly connected between the pull rod and the rear wheel frame, a backrest which is rotatably connected with the seat, a linkage mechanism which is linked with the two sub-beams to drive the backrest to fold towards the seat, a first locking pin which is fixedly installed on the inner side of the pull rod, a first locking hook which is matched with the first locking pin to realize the unlocking of the frame folding, and a first spring which is fixedly connected between the bottom of the pedal frame and the first locking hook. Through the linkage mechanism, the first locking pin and the third locking pin, the frame folding, the backrest folding and the folding state locking can be automatically realized by pulling the first handle upwards, and the user does not need to manually fold the backrest after folding the frame.

Description

Technical Field

[0001] This invention relates to the field of folding vehicle technology, and more particularly to a folding mobility scooter frame. Background Technology

[0002] Currently, the folding mobility scooters available on the market include both manual and electric folding methods. Regardless of the folding method, after the frame is folded, the user needs to manually fold the backrest, which is inconvenient for the elderly to operate. Furthermore, the manually folded backrest may become loose after long-term use, and the backrest may not fit snugly against the seat after the scooter is folded. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a folding mobility scooter frame that can fold the backrest in conjunction with the folding of the frame and prevent the backrest from becoming loose.

[0004] Technical Solution: The present invention discloses a folding mobility scooter frame, including a front end and a seat, and further including two main beams symmetrically hinged to the bottom of the seat, a rear wheel frame connected to the bottom of the two main beams, a secondary beam hinged to the main beams in the middle, a footrest frame hinged between the secondary beam and the front end, a pull rod located below the footrest frame and hinged to the front end at one end, a rear frame hinged between the pull rod and the rear wheel frame and hinged to the footrest frame at the head, a backrest rotatably connected to the seat, a linkage mechanism that drives the backrest to fold toward the seat in conjunction with the two secondary beams, a first locking pin fixedly installed inside the pull rod, a first locking hook that cooperates with the first locking pin to unlock the frame and is rotatably installed on the footrest frame, and a first spring fixedly connected between the bottom of the footrest 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 from the locked state and triggering the backrest to fold.

[0005] Furthermore, the locking mechanism includes a vertical groove plate fixedly installed on the rear side of the seat and rotatably inserted into the connection part of the backrest, a first connecting shaft and a second connecting shaft fixedly connected to the inner wall of the groove of the vertical groove plate, a guide wheel provided on the first connecting shaft, a second locking hook and a torsion spring provided on the first connecting shaft, a spool provided 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 installed on the connection part of the backrest, a second spring fixedly connected at one end to the bottom of the seat, and a pull cable fixedly connected to the other end of the second spring. The other end of the pull cable is wound around the guide wheel and then fixedly connected to the spool. The connection part of the backrest is rotatably installed on the outer periphery of the second connecting shaft and fixedly connected to the spool. 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 of the sub-beam, a cylinder fixedly connected to the two extension rods, and a cam fixedly connected to the outer periphery of the cylinder for pressing to trigger the second locking hook. The top of the extension rod is hinged to a protrusion on the bottom of the seat.

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

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

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

[0009] Furthermore, the front of the vehicle includes two symmetrically arranged front wheels, a front crossbar fixedly connected to the central axle of the two front wheels, a retractable support frame fixedly connected to the front crossbar, a ring handle fixedly connected to the top of the support frame, and a console detachably mounted inside the ring handle via a connector.

[0010] Furthermore, one end of the connector is hinged to the bottom of the console, the connector is sleeved on the outer periphery of the ring handle, and the other end of the connector is provided with a fastener for fixing it to the ring handle, and the fastener is threaded to the bottom of the console. A light is fixedly connected to the ring handle, and a cut is provided in the middle of the ring handle near the seat side for accommodating the console.

[0011] Furthermore, the console includes a controller, an upper shell and a lower shell mounted outside the controller, a display screen embedded in the top of the upper shell, charging ports on both sides of the upper shell, operation knobs and horn buttons on both sides of the upper shell, an operating lever fixedly connected to the bottom of the lower shell for adjusting speed, and a power switch mounted on one side of the lower shell. The display screen, charging ports, operation knobs, horn buttons, power switch, and operating lever are electrically connected to the controller. The operation knob is located at the break of the ring handle and is coaxially arranged with the horizontal part of the ring handle.

[0012] Furthermore, a storage mechanism is provided on the side of the main beam. The storage mechanism includes a bottom shell, an mounting component 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 by a tension spring, and a battery that is detachably installed inside the bottom shell and matches the connector.

[0013] Furthermore, an elliptical retaining ring is provided on the side of the battery away from the connector. A limiting mechanism that cooperates with the retaining ring to fix the battery is provided inside the bottom shell. 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 inside the protective tube, and a knob fixedly connected to the top of the third spring. The movable part of the knob is provided with an elliptical limiting plate that matches the retaining 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 folding state by pulling the first handle upward, without the user having 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 becoming loose after multiple folds. Attached Figure Description

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

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

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

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

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

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

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

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

[0023] Figure 9 For the present invention Figure 8 A schematic diagram of the KM rotation structure;

[0024] Figure 10 This is a schematic diagram of the movement structure of the first locking hook during folding according to the present invention;

[0025] Figure 11 This is a schematic diagram of the folding process of the present invention;

[0026] Figure 12This is a schematic diagram of the premature triggering unlocking mechanism of the present invention;

[0027] Figure 13 This is a schematic diagram of the late-triggered unlocking mechanism of the present invention;

[0028] Figure 14 This is a schematic diagram of the structure of the unlocking mechanism that is triggered at the appropriate time according to the present invention;

[0029] Figure 15 This is a schematic diagram of the structure of the present invention where the third locking hook and the third locking pin lock together when folded.

[0030] Figure 16 This is a schematic diagram of the movement structure of the third handle when the invention is unfolded;

[0031] Figure 17 This is a schematic diagram of the movement structure of the third locking hook when the present invention is deployed;

[0032] Figure 18 This is a schematic diagram of the ring handle and control console of the present invention;

[0033] Figure 19 This is another structural schematic diagram of the ring handle and control console of the present invention;

[0034] Figure 20 This is a schematic diagram of the structure of the ring handle and connector of the present invention;

[0035] Figure 21 This is a schematic diagram of the storage mechanism of the present invention;

[0036] Figure 22 This is a schematic diagram of the bottom shell and top shell of the present invention;

[0037] Figure 23 This is a schematic diagram of the bottom shell and battery structure of the present invention. Detailed Implementation

[0038] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0039] Example

[0040] The present invention provides a folding mobility scooter frame, such as... Figures 1 to 4As shown, the vehicle includes a front end 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 footrest 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 are 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 are arranged to cross the main beams 6. A connecting block 30 is fixedly connected to the side of the main beam 6. The connecting block 30 is located outside the sub-beam 8, and is rotatably connected to the sub-beam 8 via a pin. The bottom of the sub-beam 8 is connected to the tail of the footrest frame 9. The pedal frame 9 is rotatably connected to the front end of the vehicle head 1. 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 end of the vehicle head 1. The two pull rods 10, the rear frame 11, and the rear wheel frame 7 are arranged in sequence, and adjacent ones are rotatably connected. The bottom of the pedal frame 9 is provided with a protrusion 31, which is located inside the rear frame 11 and is rotatably connected to the rear frame 11 through a pin. Two armrests 3 are symmetrically arranged on both sides of the seat 2. An auxiliary rod 15 is fixedly connected to the bottom of the armrest 3. The linkage mechanism 4 is located at the bottom of the seat 2 and cooperates with the sub-beam 8. The backrest 5 is triggered by the linkage mechanism 4 to fold towards the seat 2.

[0041] like Figure 7 As shown, a first locking hook 13 is rotatably mounted on the inner side of the pedal frame 9. A limiting block 43 for limiting the rotation angle of the first locking hook 13 is fixedly connected to the bottom of the crossbeam of the pedal frame 9. A first locking pin 12 is fixedly connected to the inner side of the pull rod 10. One end of the first locking hook 13 is provided with a locking groove that cooperates with the first locking pin 12, and the other end of the first locking hook 13 is provided with a groove that cooperates with the limiting block 43. The lateral part of the limiting block 43 is located inside its groove. A first spring 14 is connected between the bottom of the pedal frame 9 and the first locking hook 13. Under the action of the first spring 14, the first locking hook 13 hooks the first locking pin 12 and maintains this state, so that the entire frame is in an unfolded state. When the first locking hook 13 is in normal use, the inner wall of one side of the slot abuts against the limiting block 43. The top of the two first locking hooks 13 is fixedly connected to the first handle 39. The first handle 39 is designed to facilitate the user to adjust the first locking hooks 13. When folding is required, pull the first handle 39 upward to disengage the first locking hook 13 from the first locking pin 12 and unlock it. Continue to pull the first handle 39 upward to achieve overall folding. When the frame needs to be unfolded, after the frame is unfolded, press the first handle 39 downward to make the first locking hook 13 hook the first locking pin 12 and lock the frame in the unfolded state. At this time, the inner wall of the other side of the slot of the first locking 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 backrest 5 from the locked state and triggering the folding of the backrest 5. The locking mechanism includes a vertical groove plate 20, a first connecting shaft 21, a guide wheel 22, a second locking hook 23, a torsion spring 24, a second spring 25, a pull cable 26, a second locking pin 27, a spool 41, and a second connecting shaft 42. The vertical groove plate 20 is fixedly connected to the rear side of the seat 2. The connecting part of the backrest 5 is inserted into the interior of the vertical groove plate 20 and rotatably connected thereto. The first connecting shaft 21 and the second connecting shaft 42 are respectively fixedly installed in the notch of the vertical groove plate 20. The guide wheel 22, the second locking hook 23, and the torsion spring 24 are sequentially sleeved on the outer periphery of the first connecting shaft 21. The connecting part of the backrest 5 and the spool 42 are sleeved on... On the outer periphery of the second connecting shaft 42, the connecting part of the backrest 5 is fixedly connected to the reel 42, specifically by connecting the connecting part of the backrest 5 and the reel 42 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, and the other end of the second spring 25 is fixedly connected to the pull line 26; the end of the pull line 26 away from the second spring 25 passes through the guide wheel 22 and is fixedly connected to the reel 42; one end of the torsion spring 24 abuts against the seat 2, and the other end of the torsion spring 24 abuts against the second locking hook 23. When the backrest 5 is unfolded, the setting of the torsion spring 24 makes the second locking hook 23 lock with the second locking pin 27, which helps to maintain the reliability of the backrest 5 during 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 and rotatably connected to the top of the extension rod 17. The top of the sub-beam 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 cams 18 to rotate, the cams 18 press the second locking hook 23 to engage with the second locking pin 27. Preferably, the top of the cam 18 is equipped with a rubber wheel 19 to reduce the friction between it and the second locking hook 23.

[0043] like Figure 8As shown, the front of the vehicle 1 is hinged to the first end of the pedal frame 9 to form hinge point A; the bottom of the pedal frame 9 is hinged to the first end of the rear frame 11 to form hinge point B; the tail end of the tie rod 10 is hinged to the inner side of the rear frame 11 to form hinge point C; and the first end of the tie rod 10 is hinged to the front of the vehicle 1 to form hinge point D. AB, BC, CD, and 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 sub-beam 8 to form hinge point E; the middle part of the sub-beam 8 is hinged to the main beam 6 to form hinge point H; and the tail end of the rear frame 11 is hinged to the rear wheel frame 7 to form hinge point F. BE, EH, HF, and FB constitute a four-link 2 connected end to end. Four-link 1 and four-link 2 are linked by ABE (pedal frame 9). Preferably, BF and BE are linked. An angle β is formed, and β < 20°; the top of the main beam 6 is hinged to the seat 2 to form the L hinge point, the top of the sub-beam 8 is hinged to the bottom of the extension rod 17 to form the K hinge point, the top of the extension rod 17 is hinged to the seat 2 to form the M hinge point, LH, HK, KM, and ML constitute a four-bar linkage 3 connected end to end, and the four-bar linkage 2 and the four-bar linkage 3 are linked through EHK (sub-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 the O connection point; the four-bar linkage 1 folds and links the four-bar linkage 2 and the four-bar linkage 3, and when the frame starts to fold to halfway, KM (extension rod 17) drives the cylinder 16 to rotate, causing the second locking hook 23 to rotate counterclockwise around the O connection point.

[0044] like Figure 9 He Ru Figure 11 As shown, during the entire process of the frame changing from the unfolded state to the folded state, the angle θ between LM and KM is 0° ≤ θ ≤ 60°. During the folding process, the sub-beam 8 rotates, triggering the unlocking mechanism. During folding, the seat 2 rotates clockwise as a whole; as... Figure 12 As shown, if the unlocking mechanism is triggered too early, the backrest 5 will be in a basically vertical state (i.e., basically in the unfolded state). At this time, when the backrest 5 folds towards the seat 2, it does not need to overcome its own weight, and the backrest 5 will fold at an extremely fast speed, which will generate some noise, for example, when θ = 5°. Figure 13 As shown, if the unlocking mechanism is triggered too late, the seat 2 frame rotates clockwise as it folds. At this time, the seat 2 is nearly vertical, the backrest 5 is perpendicular to the seat 2, and the backrest 5 is nearly horizontal. After unlocking, when the backrest 5 folds towards the seat 2, it needs to overcome its own weight. Similarly, the linkage mechanism 4 with the same elasticity will not be able to complete the folding of the backrest 5, for example, when θ = 55°. Figure 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 folded in linkage. The connecting rod KM (extension rod 17) needs to rotate 60° from the unfolded state of the frame to the final folded state of the frame. 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, then the second locking hook 23 rotates 15° (the rotation angle of the second locking hook 23 is defined as γ, at this time γ=15°), and unlocking is completed. For unlocking the second locking hook 23, it needs to rotate 15° to make the second locking pin 27 of the backrest 5 disengage from the second locking hook 23, and the backrest 5 is folded and stored toward 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 rotation of the backrest 5.

[0047] As Figure 2 shown, the head 1 comprises a front wheel 32, a front cross frame 33, a support frame 34, a connecting member 44, an annular handle 35 and a console 36. There are two front wheels 32, 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 center position of the front cross frame 33. The annular handle 35 is fixedly connected to the top end of the support frame 34. The console 36 is detachably mounted on the inner side of the annular handle 35 through the connecting member 44.

[0048] The rear wheel frame 7 comprises a rear cross frame 37 and rear wheels 38 mounted at both ends of the rear cross frame 37, and the rear frame 11 is rotatably connected with the rear cross frame 37. Preferably, the distance between the two front wheels 32 is smaller than the distance between the two rear wheels 38. Compared with one wheel in the existing frame, the arrangement of the two front wheels 32 of the head 1 is beneficial to improving the stability during overall use on the premise of ensuring the overall flexibility of use.

[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 mounted on the inner side of the rear frame 11. When the frame is folded, the third locking hook 29 hooking the third locking pin 28 can lock the frame in the folded state to 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 a user to control the third locking hook 29.

[0050] As Figure 3 and Figure 17As shown, one end of the connector 44 is hinged to the bottom of the console 36. The connector 44 is sleeved on the outer periphery of the ring handle 35, and the other end of the connector 44 is provided with a fastener 45 for fixing it to the ring handle 35. The fastener 45 is threaded to the bottom of the console 36. The ring handle 35 has a cut-out for accommodating the console 36 in the middle of the side near the seat. In actual use, the console 36 can be rotated by loosening the fastener 45. After the console 36 is rotated to a comfortable tilt angle for the user, the fastener 45 is tightened again to fix the console 36 in the current position. The console 36 is used to control the overall operation. The support frame 34 is set as a telescopic structure, which allows the user to adjust the height of the console 36 according to their own height, and can also retract the height when the whole is folded to further reduce the space occupied by the whole. A light 46 is fixedly connected to the ring handle 35, and the light 46 is located in the groove at the bottom of the console 36. The light 46 and the console 36 are set independently of each other, and the console 36 and the ring handle 35 are detachably connected, which makes it convenient to remove the console 36 from the frame for maintenance.

[0051] like Figures 18-20As shown, the control console 36 includes a controller, an upper shell 361 and a lower shell 362 mounted outside the controller, a display screen 363 embedded in the top of the upper shell 361, charging ports 364 on both sides of the upper shell 361, operation knobs 365 and horn buttons 366 on both sides of the upper shell 361, an operating lever 367 fixedly connected to the bottom of the lower shell 362 for adjusting speed, and a power switch 368 on one side of the lower shell 362. The operation knobs 365 are used to switch the gears of the scooter. The operation knobs 365 are located at the break of the ring handlebar 35 and are coaxially arranged with the horizontal part of the ring handlebar 35. The display screen 363, charging ports 364, operation knobs 365, horn buttons 366, power switch 368, and operating levers 367 are electrically connected to the controller. The charging ports 364 include a battery charging port for the frame and other charging ports. The other charging ports are preferably USB charging ports, which are convenient for users to charge mobile phones and other electronic products. In existing mobility scooters, the horn and speed control buttons or other function buttons are separately mounted on both sides of the handlebars, and the instruments are not interchangeable between different models. In contrast, the control components of this invention are integrated into the control console 36, simplifying the manufacturing and installation of the console 36 onto the frame. Furthermore, the control console 36 is highly adaptable to different frames. The display screen 363 provides real-time speed information, speed gear, battery level, vehicle malfunction alarms, and electromagnetic brake alarms, while also reserving interfaces for future additions of display content. The horn button 366 is located on the upper shell 361, in a clearly visible position that prevents accidental activation. The upper shell 361 integrates the display screen 363, charging port 364, operation knob 365, and horn button 366, forming a modular structure that facilitates production and assembly. The power switch 368 is located on the user-friendly side of the control console 36, making it more convenient for the user to operate while driving, and shifting gears while operating the power switch 368 does not affect the instrument panel. Its functions include: The lower housing 362 has inlet and outlet holes for cable management, facilitating connection of communication cables, lighting lamp 46 cables, or other cables, making wiring easier and more practical; the operating lever 367 is located inside the ring handle 35, and forms a non-zero angle with the ring handle 35, meaning the operating lever 367 forms an angle between zero and ninety degrees. This allows the user to easily operate the operating lever 367 when in contact with the ring handle 35, and the limited angle between the operating lever 367 and the ring handle 35 helps reduce the possibility of device damage.

[0052] like Figures 21-23As shown, a storage mechanism 47 is detachably connected to the side of the main beam 6. The storage mechanism 47 includes a bottom shell 471, a mounting component 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 component 472 is installed between the main beam 6 and the bottom shell 471. By adjusting the installation position of the mounting component 472 and the bottom shell 471, the bottom shell 471 can be installed on different models of racks for convenient actual use. The battery 476 is detachably installed inside the bottom shell 471. A base 474 is fixedly installed inside the bottom shell 471. A connector that is electrically connected to the control panel 36 of the mobility scooter is installed on one side of the base 474. When the battery 476 is installed inside the bottom shell 471 and plugged into the connector, the battery 476 can provide power to the mobility scooter as a backup power source. Preferably, a protective cover 475 is installed on the top of the base 474 by a tension spring. When the battery 476 is not equipped, the protective cover 475 helps to protect the connector.

[0053] Preferably, an elliptical retaining ring 477 is provided on the side of the battery 476 away from the connector. A limiting mechanism is provided inside the bottom shell 471 to cooperate with the retaining ring 477 in fixing 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 inside 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 fitting to the retaining ring 477 for pressing. An elliptical limiting plate is used to fix the battery 476. When equipping the battery 476, pull up and rotate the knob 479 so that the limiting plate of the knob 479 is aligned with the fixing ring 477, so that the fixing ring 477 passes through the knob 479. After the battery 476 is installed, release the knob 479 and then rotate the knob 479 in the opposite direction so that the limiting plate is perpendicular to the fixing ring 477, so that the limiting plate of the knob 479 presses on the fixing ring 477 to limit and fix the battery 476.

[0054] Working process: When folding and storing, the folding process is illustrated in the diagram below. Figure 11 As shown, pull the first handle 39 upwards to disengage the first locking hook 13 from the first locking pin 12, as... Figure 10As shown, the first locking hook 13 moves from position 1 to position 2, releasing the lock and unlocking the entire frame. Continuing to pull the first handlebar 39 upwards, when the frame is folded halfway, the sub-beam 8 drives the extension rod 17 to rotate counterclockwise, causing the cylinder 16 to rotate counterclockwise, which in turn causes the rubber wheel 19 to rotate counterclockwise and press against the second locking hook 23. This causes the other end of the second locking hook 23 to disengage from the second locking pin 27, unlocking the backrest 5. Under the action of the second spring 25, the pull cable 26 causes the backrest 5 to fold towards the seat 2. Simultaneously, the counterclockwise rotation of the extension rod 17 drives the auxiliary rod 15 to rotate, causing the armrest 3 to fold along with the frame. Continuing to pull the first handlebar 39 upwards, the armrests 3 on both sides close tightly. The third locking pin 28 on the sub-beam 8 slides along the inclined surface of the third locking pin 28 into the locking groove of the third locking pin 28, folding and locking the entire frame structure. Figure 15 As shown.

[0055] When unfolding the frame, press the third handlebar 40 to disengage the third locking hook 29 from the third locking pin 28, as shown. Figure 16 As shown, the third handle 40 moves from position 1 to position 2, as... Figure 15 As shown, the third locking pin 28 moves from position 1 to position 2, unlocking the frame. Then, by holding the first handlebar 39, the frame naturally unfolds under its own weight. The first locking pin 12 on the inner side of the lever 10 contacts the inclined surface of the first locking hook 13. The first locking hook 13 rotates clockwise, and the first locking pin 12 slides into the locking groove of the first locking hook 13. The frame is then fully unfolded and locked. After the frame is unfolded, the backrest 5 is manually rotated clockwise. The second locking pin 27 on the backrest 5 slides into the locking groove of the second locking hook 23. The torsion spring 24 ensures that the second locking pin 27 remains in the locking groove of the second locking hook 23, keeping the backrest 5 in a stable state.

Claims

1. A folding mobility scooter frame, comprising a front end (1) and a seat (2), characterized in that: It also includes two main beams (6) symmetrically hinged to the bottom of the seat (2), a rear wheel frame (7) connected to the bottom of the two main beams (6), a sub-beam (8) hinged in the middle to the main beams (6), a pedal frame (9) hinged between the sub-beam (8) and the front of the vehicle (1), a tie rod (10) located below the pedal frame (9) and hinged at one end to the front of the vehicle (1), a rear frame (11) hinged between the tie rod (10) and the rear wheel frame (7) and hinged at the head to the pedal frame (9), a backrest (5) rotatably connected to the seat (2), and a linkage drive with the two sub-beams (8). The linkage mechanism (4) for folding the backrest (5) toward the seat (2), the first locking pin (12) fixedly installed inside the pull rod (10), the first locking hook (13) which cooperates with the first locking pin (12) to unlock the frame and rotate on the pedal frame (9), and the first spring (14) fixedly connected between the bottom of the pedal frame (9) and the first locking hook (13); the linkage mechanism (4) includes a locking mechanism for locking the backrest (5) in the unfolded state and an unlocking mechanism for releasing the backrest (5) from the locked state and triggering the backrest (5) to fold. The locking mechanism includes a vertical groove plate (20) fixedly installed on the rear side of the seat (2) and rotatably inserted into the connection part of the backrest (5); a first connecting shaft (21) and a second connecting shaft (42) fixedly connected to the inner wall of the groove of the vertical groove plate (20); a guide wheel (22) provided on the first connecting shaft (21); a second locking hook (23) and a torsion spring (24) provided on the first connecting shaft (21); a spool (41) provided on the outer periphery of the second connecting shaft (42); a second locking pin (27) that cooperates with the second locking hook (23) to lock the backrest (5) and is fixedly installed on the connection part of the backrest (5); a second spring (25) fixedly connected at one end to the bottom of the seat (2); and a second spring (25) and a guide wheel (22) that cooperates with the second connecting shaft (21) to lock the backrest (5). The other end is fixedly connected to a pull wire (26), the other end of which is wound around a guide wheel (22) and fixedly connected to a spool (41). The connecting part of the backrest (5) is rotatably installed on the outer periphery of the second connecting shaft (42) and fixedly connected to the spool (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 includes an extension rod (17) hinged to the top of the sub-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 pressing to trigger the second locking hook (23). The top of the extension rod (17) is hinged to the protrusion at the bottom of the seat (2).

2. The folding mobility scooter frame according to claim 1, characterized in that: The inner side of the sub-beam (8) is fixedly connected to a third locking pin (28), and the inner side of the rear frame (11) is rotatably installed with a third locking hook (29) that cooperates with the third locking pin (28) to lock the frame in a folded state.

3. The folding mobility scooter frame according to claim 2, characterized in that: The seat (2) is symmetrically provided with armrests (3) on both sides, and an auxiliary rod (15) is integrally provided at the bottom of the armrest (3). The two ends of the cylinder (16) are respectively fixedly connected to the two auxiliary rods (15).

4. The folding mobility scooter frame according to claim 3, characterized in that: The top of the main beam (6) is hinged to the seat (2) to form an L hinge point, the top of the extension rod (17) is hinged to the seat (2) to form an M hinge point, and the top of the sub-beam (8) is hinged to the bottom of the extension rod (17) to form a K hinge point. When the angle θ between the LM line and the KM line is 5° < θ < 55°, the extension rod (17) drives the cam (18) on the cylinder (16) to press and trigger the second locking hook (23) to rotate counterclockwise to complete the unlocking.

5. The folding mobility scooter frame according to claim 1, characterized in that: The front of the vehicle (1) includes two symmetrically arranged front wheels (32), a front crossbar (33) fixedly connected to the central axis of the two front wheels (32), a retractable support frame (34) fixedly connected to the front crossbar (33), a ring handle (35) fixedly connected to the top of the support frame (34), and a console (36) detachably installed inside the ring handle (35) via a connector (44).

6. The folding mobility scooter frame according to claim 5, characterized in that: One end of the connector (44) is hinged to the bottom of the console (36), the connector (44) is sleeved on the outer periphery of the ring handle (35), and the other end of the connector (44) is provided with a fastener (45) for fixing it to the ring handle (35), and the fastener (45) is threaded to the bottom of the console (36). A light (46) is fixedly connected to the ring handle (35), and a cut is provided in the middle of the ring handle (35) near the seat (2) for accommodating the console (36).

7. The folding mobility scooter frame according to claim 6, characterized in that: The control 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) on both sides of the upper shell (361), an operation knob (365) and a horn button (366) on both sides of the upper shell (361), an operation lever (367) fixedly connected to the bottom of the lower shell (362) for adjusting speed, and a switch (368) installed on one side of the lower shell (362). The display screen (363), the charging port (364), the operation knob (365), the horn button (366), the switch (368) and the operation lever (367) are electrically connected to the controller. The operation knob (365) is located at the break of the ring handle (35) and is coaxially arranged with the horizontal part of the ring handle (35).

8. The folding mobility scooter frame according to claim 1, characterized in that: The main beam (6) is provided with a storage mechanism (47) on its side. The storage mechanism (47) includes a bottom shell (471), a mounting piece (472) connecting the bottom shell (471) and the main beam (6), a top shell (473) that cooperates with the bottom shell (471) to form a storage space and is connected to the bottom shell (471), a base (474) fixedly installed inside the bottom shell (471), a plug-in piece installed on one side of the base (474), a protective cover (475) installed on the top of the base (474) by a tension spring, and a battery (476) that is detachably installed inside the bottom shell (471) and matches the plug-in piece.

9. The folding mobility scooter frame according to claim 8, characterized in that: An elliptical retaining ring (477) is provided on the side of the battery (476) away from the connector. The bottom shell (471) is provided with a limiting mechanism that cooperates with the retaining 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 retaining ring (477) and is used to press and fix the battery (476).

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