A cart having a misfold prevention bottom tray

Abstract

The utility model discloses a car with prevent misfolding chassis, chassis includes: connecting seat, connecting seat at least bottom surface is equipped with a plurality of connecting parts, support rod, support rod quantity is at least four groups, distributes four corner positions of connecting seat, support rod one end with connecting part rotatory connection, and quantity is at least four groups support rod can rotate to a plane or fold relative connecting seat, support rod other end is used for with car frame connection, stop piece, stop piece with connecting seat adjustable connection, when stop piece relative connecting seat moves first position, support rod can rotate relative connecting part, when stop piece relative connecting seat is located second position, stop piece restricts support rod and connecting part relative rotation, connecting module, connecting module is equipped with a plurality of fixed positions, support rod away from one end of connecting seat and the fixed position rotatory connection of connecting module.

Description

Technical Field

[0001] This application relates to the field of transport vehicle equipment technology, specifically a vehicle with a chassis designed to prevent accidental folding. Background Technology

[0002] Users who need to travel for business, leisure, hiking, camping, or moving items often need to use trolleys to transport luggage and belongings, which is more convenient and less strenuous than carrying by hand. Currently, there are folding trolleys on the market that can be unfolded into a complete structure when in use and folded up for storage when not in use to save space.

[0003] However, current vehicle chassis folding structures, when empty or unloaded, or when the transported items are placed in unusual or unbalanced positions, may cause the chassis to fold accidentally when the vehicle is pushed, potentially affecting the stability of the trolley. Examples include a folding, non-heightening trolley disclosed in patent application number 202222950188.9, and a folding trailer chassis and trailer that automatically lowers upon folding, disclosed in patent application number 202320967728.6.

[0004] Therefore, there is an urgent need for a new type of chassis that can ensure the strength of the vehicle body while preventing unnecessary folding during the use of the handcart, making the handcart more stable and reliable when moving. Utility Model Content

[0005] This utility model addresses the above-mentioned problems by proposing a vehicle with a chassis designed to prevent accidental folding, aiming to solve the technical issues mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides a chassis for use in vehicle frames, the chassis comprising: A connector, wherein the connector has at least a plurality of connecting portions on its bottom surface; and the connector also has at least two detachable connecting positions on its bottom surface. The support rods are provided in at least four sets, distributed at the four corners of the connecting seat; one end of each support rod is rotatably connected to the connecting part, and at least four sets of support rods are rotatable relative to the connecting seat to a plane or foldable; the other end of each support rod is detachably connected to the vehicle frame. An additional connecting block is provided, which is detachably connected to the detachable connecting position; the detachable connecting position is located between the two connecting parts. An additional reinforcing rod is provided, one end of which is rotatably connected to the additional connecting block; at least two of the additional reinforcing rods are rotatable relative to the connecting seat to a plane or folded; the other end of the additional reinforcing rod is at least rotatably connected to the vehicle frame.

[0007] Furthermore, the support rod is rotatably connected to the connecting part via a pin.

[0008] Furthermore, at least one end of the support rod and the additional reinforcing rod is provided with a reinforcing support member.

[0009] Furthermore, the connecting seat is provided with a rotation clearance hole at the end corresponding to the support rod.

[0010] Furthermore, the system includes a connector, wherein one end of the additional reinforcing rod away from the additional connecting block is rotatably connected to the frame via the connector; when both the support rod and the additional reinforcing rod are rotated relative to the connecting seat to a plane, the connector is also used to support the additional reinforcing rod.

[0011] Furthermore, the additional connecting block is provided with a docking limiting rail, and the connecting seat is provided with a docking connecting groove to match the docking limiting rail; the connecting seat and the additional connecting block are detachably connected by screws.

[0012] Furthermore, the connector is a rope or a metal strip.

[0013] Furthermore, the scissor-type telescopic frame includes multiple rotatably connected support rods, and at least some of the support rods are provided with damping hinges at their connection points.

[0014] Furthermore, the mop includes a mop with one end rotatably connected to the fixed position; the mop includes a connecting frame, a main rod, and a handle; the connecting frame connects the fixed position and the main rod, and the handle is connected to the end of the main rod away from the connecting frame; the connecting frame and the main rod adjust the lifting and lowering of the main rod by a push-button switch; the main rod is a telescopic rod.

[0015] Furthermore, it includes a reinforcing connecting rod; an extension frame is rotatably connected to one side of the frame; connecting sleeves are provided at the upper ends of the two uprights adjacent to the extension frame, one end of the connecting sleeve is used to connect to the scissor-type telescopic frame, and the other end is provided with a rotating connecting pin; both ends of the reinforcing connecting rod are rotatably connected to the rotating connecting pin, and at least one end of the reinforcing connecting rod is provided with an open connecting hook, which can be disengaged from the rotating connecting pin; the reinforcing connecting rod includes an inner tube, an outer tube sleeved on the inner tube, and a locking member that keeps the inner tube and the outer tube relatively fixed; the inner tube and the outer tube are telescopically slidably connected. A limiting groove is provided on the side wall of the outer tube, and a limiting protrusion is provided in the limiting groove and connected to the inner tube.

[0016] To achieve the objectives described in the background art, this utility model provides a vehicle with a chassis designed to prevent accidental folding, comprising a chassis including: The connecting seat has at least a plurality of connecting parts on its bottom surface; The support rods are provided in at least four sets, distributed at the four corners of the connecting seat; one end of each support rod is rotatably connected to the connecting part, and at least four sets of support rods are rotatable relative to the connecting seat to a plane or folded; the other end of each support rod is used to connect to the vehicle frame. A stop member is provided, which is adjustablely connected to the connecting seat. When the stop member moves to a first position relative to the connecting seat, the support rod can rotate relative to the connecting part. When the stop member is in a second position relative to the connecting seat, the stop member restricts the relative rotation of the support rod and the connecting part. The connecting module has multiple fixed positions; the end of the support rod away from the connecting seat is rotatably connected to the fixed position of the connecting module.

[0017] Furthermore, the support rod has a rotation area at one end opposite to the support rod end, the rotation area including a connected movable clearance area and an anti-rotation area; the connecting seat has a sliding through hole corresponding to the position of the rotation area; the stop member includes a pull rod, a stop block, and an elastic member; the pull rod is slidably connected to the sliding through hole; the stop block is connected to one end of the pull rod; the other end of the pull rod extends out of the sliding through hole and has a stop portion to prevent the pull rod from disengaging from the connecting seat; one end of the elastic member abuts against the stop block, and the other end abuts against the connecting seat, for keeping the stop block located in the anti-rotation area; When the pull rod is driven to move, causing the stop block to move to a first position relative to the connecting seat, the stop block is located in the movable clearance area, and there is a non-contact gap between the stop block and the support rod; the support rod can rotate relative to the connecting part; When the pull rod is not driven, the elastic element abuts against the stop block and the connecting seat to keep the stop block in the anti-rotation zone. That is, when the stop element is in the second position relative to the connecting seat, the stop block restricts the relative rotation of the support rod and the connecting part.

[0018] Furthermore, the stop component also includes a stop block sleeve and a limiting washer; the stop block sleeve at least partially sleeves the pull rod; the pull rod is slidably connected to the sliding through hole through the stop block sleeve; the stop block is connected to the pull rod and / or the stop block sleeve; the outer diameter of the limiting washer is larger than the sliding through hole; the inner hole of the limiting washer sleeves the pull rod; the stop portion is a pull cap with an outer diameter larger than the inner hole of the limiting washer.

[0019] Furthermore, each set of support rods consists of two rods, and the length of each support rod extending into the rotation area is set according to its correspondence with the active avoidance area and the anti-rotation area.

[0020] Furthermore, it also includes a frame and wheels; the frame includes a pole and a scissor-type telescopic frame; the lower end of the pole is connected to the fixed position; the wheels are connected to the chassis or the frame.

[0021] Compared with the prior art, the present invention provides a vehicle with a chassis that prevents accidental folding. The transport vehicle using the chassis provided by the present invention can prevent the chassis from folding when the vehicle is moved, even when it is empty or unloaded, or when the transported goods are placed in a special position and the center of gravity is unbalanced, thus avoiding affecting the stability of the handcart. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a vehicle with a chassis designed to prevent accidental folding, in accordance with this application.

[0023] Figure 2 This is a schematic diagram of a vehicle folding structure that prevents accidental folding of the chassis, as described in this application.

[0024] Figure 3 A schematic diagram of a vehicle component structure for applying this application, which has a chassis designed to prevent accidental folding.

[0025] Figure 4 An exploded view of a vehicle structure with a chassis designed to prevent accidental folding, as described in this application.

[0026] Figure 5 This is a schematic diagram of the structure of a vehicle with a chassis designed to prevent accidental folding during the folding process, as described in this application.

[0027] Figure 6 This is a schematic diagram of the structure of a vehicle chassis with a chassis designed to prevent accidental folding, as described in this application.

[0028] Figure 7 This is a schematic diagram of the structure of a vehicle chassis with a chassis designed to prevent accidental folding, as described in this application, when unfolded.

[0029] Figure 8 This is an exploded view of a vehicle chassis structure with a chassis designed to prevent accidental folding, as described in this application.

[0030] Figure 9 This is a partial exploded view of a vehicle chassis with a chassis designed to prevent accidental folding, as described in this application.

[0031] Figure 10 This is a partial cross-sectional schematic diagram of a vehicle chassis with a chassis designed to prevent accidental folding, as described in this application.

[0032] Figure 11 This is an exploded view of a vehicle component structure that prevents accidental folding of the chassis, according to this application.

[0033] Figure 12This is an exploded view of a scissor-type telescopic frame structure for a vehicle with a chassis designed to prevent accidental folding, as described in this application.

[0034] Figure 13 This is a partially exploded schematic diagram of a vehicle with a chassis designed to prevent accidental folding, as described in this application.

[0035] Figure 14 This is a schematic diagram of a vehicle component structure that prevents accidental folding of the chassis, as described in this application.

[0036] Figure 15 This is a schematic diagram of a mop structure for a vehicle with a chassis designed to prevent accidental folding, as per this application.

[0037] Figure 16 This is a partial cross-sectional view of a mop for a vehicle with a chassis designed to prevent accidental folding, as per this application.

[0038] Figure 17 This is a schematic diagram of a reinforced connecting rod structure for a vehicle with a chassis designed to prevent accidental folding, as per this application.

[0039] The reference numerals in the figure are as follows: 100, chassis; 1, connecting seat; 110, connecting part; 120, detachable connecting position; 130, mating connecting groove; 140, rotation clearance hole; 150, sliding through hole; 2, support rod; 3, additional connecting block; 310, mating limit rail; 4, additional reinforcing rod; 5, pin; 6, reinforcing support; 7, connecting part; 8, screw; 9, wheel; 10, upright; 11, scissor-type telescopic frame; 1101, support rod; 1102, damping hinge; 12, connecting module; 14, mop; 1401, connecting frame; 1402, main rod; 1403, handle; 14 04. Press switch; 1405. Limit sleeve; 1406. Limit sleeve; 15. Reinforcing connecting rod; 1501. Connecting hook; 1502. Inner tube; 1503. Outer tube; 1504. Locking element; 1505. Limit groove; 1506. Limit protrusion; 16. Extension frame; 17. Connecting sleeve; 18. Rotating connecting pin; 19. Bending rod; 1901. Retaining element; 20. Stop element; 21. Pull rod; 22. Stop block; 23. Elastic element; 24. Stop part; 25. Stop block sleeve; 26. Limiting gasket; 30. Rotation area; 31. Movable clearance area; 32. Anti-rotation area; 200. Frame. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. It is understood that the accompanying drawings are provided for reference and illustration only and are not intended to limit the present utility model. The connection relationships shown in the drawings are only for clear description and do not limit the connection method.

[0041] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0042] It should also be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In different travel scenarios, the quantity and volume of items carried by users vary significantly, creating diverse demands for the carrying capacity of handcarts. Existing handcarts face a key contradiction: increasing the volume often requires more material to maintain structural strength, but this increases the overall weight. More importantly, many current handcarts have insufficient chassis structural strength. When users carry empty carts or a few small items, they are prone to accidental folding when traversing steps or uneven surfaces, severely impacting stability and safety, resulting in a poor user experience.

[0044] The main reason for the above problems lies in the insufficient rigidity and stability of the existing handcart chassis structure. Although most handcarts use retractable crossbar connections for their side railings, the chassis dimensions are fixed after unfolding and cannot be reinforced or adjusted. This makes the overall structure prone to swaying or even accidental folding under load or during movement. This not only limits the flexibility of cargo capacity but also poses structural safety hazards. Therefore, there is an urgent need for a chassis and cart that can solve the above problems, flexibly expand the capacity, has a stable structure, and is not prone to accidental folding.

[0045] Please refer to Figure 1 - Figure 17 To address the aforementioned problems, this embodiment provides a chassis, which is a replaceable folding chassis applied to a vehicle frame 200. The chassis 100 includes: The connecting seat 1 has at least a plurality of connecting portions 110 on its bottom surface; the connecting seat 1 also has at least two detachable connecting positions 120 on its bottom surface. Support rod 2, the number of which is at least four sets, distributed at the four corners of the connecting seat 1; one end of the support rod 2 is rotatably connected to the connecting part 110, and the number of which is at least four sets; the support rod 2 can rotate relative to the connecting seat 1 to a plane or be folded; the other end of the support rod 2 is detachably connected to the frame 200; An additional connecting block 3 is provided, which is detachably connected to the detachable connecting position 120; the detachable connecting position 120 is located between the two connecting portions 110. An additional reinforcing rod 4 is provided, one end of which is rotatably connected to the additional connecting block 3; at least two of the additional reinforcing rods 4 are rotatable relative to the connecting seat 1 to a plane or folded; the other end of the additional reinforcing rod 4 is at least rotatably connected to the frame 200.

[0046] In the folded state, the ends of the support rod 2 and the additional reinforcing rod 4 that are away from the connecting seat 1 are close together.

[0047] Working principle: After the chassis 100 is connected to the frame 200, and at least the wheels 9 are combined, a basic vehicle body is formed. The frame 200 can use a structure from the prior art, with its side rails using scissor-type telescopic frames 11, allowing the frame 200 to be adjusted in length and width independently.

[0048] Then, in combination with the chassis 100 provided in the present application, the support rod 2 is detachably connected to the frame 200, and the additional connecting block 3 is detachably connected to the detachable connection position 120. First, disconnect the chassis 100 from the frame 200, then adjust the length and width of the frame 200, and replace the chassis 100 with an integrated structure of the support rod 2 and the connecting seat 1 that conforms to the adjusted length and width of the frame 200. The length of the support rod 2 in this chassis 100 has some changes compared to the support rod 2 in the previous chassis 100.

[0049] There is a gap between adjacent support rods 2. When the size of the vehicle chassis 100 is smaller, the gap between adjacent support rods 2 at the front and rear ends or the left and right ends is smaller. Then, the additional strengthening rod 4 can be dispensed with, and the connection between the additional connecting block 3 and the connecting seat 1 can be directly cancelled, and the additional strengthening rod 4 can be removed.

[0050] When the vehicle chassis 100 is larger, the gap between adjacent support rods 2 at the front and rear ends or the left and right ends is larger. Then, at the positions with larger gaps on the chassis 100, the bearing capacity is weaker. At this time, it is necessary to set an additional strengthening rod 4 to support this gap position. The number of support rods 2 is at least four groups, distributed at the four corners of the connecting seat 1, and the detachable connection position 120 is arranged between the two connecting parts 110, which can make the outline of the chassis 100 roughly in the shape of a "rice" character in some embodiments. In a preferred embodiment, the number of additional strengthening rods 4 is two, making the outline of the chassis 100 roughly in the shape of a "rice" character minus the "|" character.

[0051] For the trolley using the chassis 100 provided in this embodiment, the structural strength of the vehicle body is significantly enhanced, effectively overcoming the situation of accidental folding and retracting during the vehicle's movement due to insufficient rigidity of the original vehicle body structure. Users do not need to purchase multiple vehicles with different capacities and strengths. They only need to keep the chassis and frame provided in this embodiment and replace the chassis accessories with different length and width sizes according to actual usage needs. Even multiple chassis can share the same connecting seat and additional connecting block assembly. Users can also select and match support rods and additional strengthening rods with different lengths as adjustment spare parts according to needs. This design method effectively reduces the user's purchase cost while achieving structural stability, and at the same time significantly improves the use experience and convenience.

[0052] Please refer to Figure 8 , the support rod 2 is rotatably connected to the connecting part 110 through a pin shaft 5.

[0053] In some embodiments, the pin shaft 5 is detachable, which facilitates the support rod 2 to be both rotatably connected to the connecting part 110 and disconnected to replace the support rod 2.

[0054] Please refer to Figure 8 and Figure 11 , at least one end of the support rod 2 and the additional strengthening rod 4 is provided with a strengthening support member 6.

[0055] In the industry, support rods 2 and additional reinforcing rods 4 are generally made of hollow tubes while ensuring their structural strength. However, the ends of support rods 2 and additional reinforcing rods 4 are generally used to connect or rotate with other components and bear large forces. Therefore, the ends are connected by reinforcing support members 6 to enhance their structural strength.

[0056] In some embodiments, the reinforcing support 6 is a sleeve or cap structure, sleeved on both ends of the support rod 2 and the additional reinforcing rod 4, with connecting holes or rotating connecting holes passing through the rod body and the reinforcing support 6.

[0057] In some embodiments, the reinforcing support 6 has a shaft portion that can be inserted into the inner hole of the support rod 2 or the additional reinforcing rod 4, and a connecting hole or a rotating connecting hole can be provided on the reinforcing support 6.

[0058] Please refer to Figure 6 The connecting seat 1 is provided with a rotation clearance hole 140 at the end corresponding to the support rod 2.

[0059] Rotating the clearance hole 140 can prevent interference with the rotation of the end of the support rod 2.

[0060] Please refer to Figure 1 and Figure 4 The system includes a connector 7, and the end of the additional reinforcing rod 4 away from the additional connecting block 3 is rotatably connected to the frame 200 through the connector 7. When the support rod 2 and the additional reinforcing rod 4 are both rotated relative to the connecting seat 1 to a plane, the connector 7 is also used to support the additional reinforcing rod 4.

[0061] The end of the additional reinforcing rod 4 that is away from the additional connecting block 3 also needs to be connected and supported to prevent the additional reinforcing rod 4 from becoming a cantilever beam with low structural strength.

[0062] If the chassis 100 itself is equipped with a rod structure to connect and support the additional reinforcing rod 4, it is impossible to achieve the folding and storage function of the chassis 100 in a good and reasonable way. Therefore, by setting the connector 7, the additional reinforcing rod 4 is indirectly rotatably connected to the frame 200, which can achieve the support function of the additional reinforcing rod 4 itself, without interfering with the folding and storage of the additional reinforcing rod 4.

[0063] Please refer to Figure 9 and Figure 11 The additional connecting block 3 is provided with a docking limiting rail 310, and the connecting seat 1 is provided with a docking connecting groove 130 to match the docking limiting rail 310; the connecting seat 1 and the additional connecting block 3 are detachably connected by screws 8.

[0064] In some embodiments, the docking limiting rail 310 may be disposed on the connecting seat 1, and the docking connecting groove 130 may be disposed on the additional connecting block 3.

[0065] This structure can achieve high stability after the additional connecting block 3 is connected to the connecting seat 1, and can also perform preliminary positioning when the two are not connected by screws 8.

[0066] Please refer to Figure 1 and Figure 4 The connector 7 is a rope or a metal strip.

[0067] In some embodiments, the two ends of the rope or metal strip of the connector 7 are connected to the support rod 1101 and the rotatable connection of the support rod 1101 in the scissor-type telescopic frame 11, and the middle part or middle region of the rope or metal strip of the connector 7 is connected to the end of the additional reinforcing rod 4.

[0068] Please refer to Figure 12 The scissor-type telescopic frame 11 includes multiple rotatably connected support rods 1101, and at least some of the support rods 1101 are provided with damping hinge parts 1102 at the connection points between them.

[0069] The damping hinge 1102 can be the friction texture on the two sets of connecting nails at the connection between the support rod 1101 and the support rod 1101, so that the scissor-type telescopic frame 11 can automatically maintain the adjusted length after the telescopic amount is adjusted to the correct position.

[0070] Please refer to Figure 1 and Figure 15 , Figure 16 The device includes a mop 14, one end of which is rotatably connected to the fixed position of the connecting module 12; the mop 14 includes a connecting frame 1401, a main rod 1402, and a handle 1403; the connecting frame 1401 connects the fixed position and the main rod 1402, and the handle 1403 is connected to the end of the main rod 1402 away from the connecting frame 1401; the connecting frame 1401 and the main rod 1402 adjust the lifting and lowering of the main rod 1402 by pressing a switch 1404; the main rod 1402 is a telescopic rod.

[0071] A limiting sleeve 1405 is provided between the two ends of the main rod 1402. The limiting sleeve 1405 is a plastic sleeve used to restrict the main rod 1402 from moving downward to the lowest point position. A limiting retaining sleeve 1406 is provided at the bottom end of the main rod 1402. The limiting retaining sleeve 1406 is a plastic retaining sleeve used to restrict the main rod 1402 from moving upward to the highest point position.

[0072] Please refer to Figure 3 and Figure 17The frame 200 includes a reinforcing connecting rod 15; an extension frame 16 is rotatably connected to one side of the frame 200; two uprights 10 adjacent to the extension frame 16 are provided with connecting sleeves 17 at their upper ends, one end of which is used to connect to the scissor-type telescopic frame 11, and the other end is provided with a rotating connecting pin 18; the two ends of the reinforcing connecting rod 15 are rotatably connected to the rotating connecting pin 18, and at least one end of the reinforcing connecting rod 15 is provided with an open connecting hook 1501, which can be disengaged from the rotating connecting pin 18; the reinforcing connecting rod 15 includes an inner tube 1502, an outer tube 1503 sleeved on the inner tube 1502, and a locking member 1504 that keeps the inner tube 1502 and the outer tube 1503 relatively fixed; the inner tube 1502 and the outer tube 1503 are telescopically slidably connected. A limiting groove 1505 is provided on the side wall of the outer tube 1503, and a limiting protrusion 1506 is provided in the limiting groove 1505 and connected to the inner tube 1502.

[0073] In some embodiments, the extension frame 16 is rotatably connected to the fixed position of the connection module 12.

[0074] Please refer to Figure 14 In some embodiments, the chassis 100 also includes a bending rod 19, the two ends of which are rotatably connected to the fixed position of the connecting module 12. The bending rod 19 itself can be bent, and when the two rod sections are flattened, the retainer 1901 can prevent further relative rotation between the two sections.

[0075] Thus, it can be seen that the connecting module 12 has multiple fixing positions for connection, and the structure of each fixing position can be different. The two main fixing positions are used to connect with the support rod 2 and the upright rod 10. The remaining fixing positions are connected to the connecting frame 1401, the bending rod 19, and the extension frame 16 according to the position of the connecting module 12 in the vehicle body.

[0076] The scissor lift telescopic frame 11 has a certain thickness. On the side of the frame 200 where the extension frame 16 is located, the scissor lift telescopic frame 11 is not installed; that is, the scissor lift telescopic frame 11 is not connected between the two uprights 10. Instead, the scissor lift telescopic frame 11 is only installed on the extension frame 16. The upper ends of the two uprights 10 are connected and reinforced by reinforcing connecting rods 15.

[0077] By abutting against the limiting protrusion 1506, the maximum length of the inner tube 1502 relative to the outer tube 1503 is limited, preventing the two from separating.

[0078] Please refer to Figure 1 - Figure 17 To address the problems in the background art, this embodiment provides a vehicle with a chassis designed to prevent accidental folding, including a chassis 100, wherein the chassis 100 includes: Connecting seat 1, wherein the connecting seat 1 has at least a plurality of connecting parts 110 on its bottom surface; Support rod 2, the number of which is at least four sets, distributed at the four corners of the connecting seat 1; one end of the support rod 2 is rotatably connected to the connecting part 110, and the number of which is at least four sets, the support rod 2 can rotate relative to the connecting seat 1 to a plane or be folded; the other end of the support rod 2 is used to connect to the frame 200; A stop 20 is adjustablely connected to the connecting seat 1. When the stop 20 moves to a first position relative to the connecting seat 1, the support rod 2 and the connecting part 110 can rotate relative to each other. When the stop 20 moves to a second position relative to the connecting seat 1, the stop 20 restricts the relative rotation of the support rod 2 and the connecting part 110. The connecting module 12 has multiple fixed positions; the end of the support rod 2 away from the connecting seat 1 is rotatably connected to the fixed position of the connecting module 12.

[0079] This design prevents the chassis from accidentally folding when the cart is moved, especially when it is empty, unloaded, or when the items being transported are placed in an unbalanced position. This helps to maintain the stability of the handcart.

[0080] Please refer to Figure 7 - Figure 10 The support rod 2 has a rotation area 30 at one end opposite to the end of the support rod 2. The rotation area 30 includes a movable clearance area 31 and an anti-rotation area 32 that are connected to each other. The connecting seat 1 has a sliding through hole 150 corresponding to the position of the rotation area 30. The stop member 20 includes a pull rod 21, a stop block 22, and an elastic member 23. The pull rod 21 is slidably connected to the sliding through hole 150. The stop block 22 is connected to one end of the pull rod 21. The other end of the pull rod 21 extends out of the sliding through hole 150 and has a stop portion 24 to prevent the pull rod 21 from disengaging from the connecting seat 1. One end of the elastic member 23 abuts against the stop block 22, and the other end abuts against the connecting seat 1, for keeping the stop block 22 located in the anti-rotation area 32. When the pull rod 21 is driven to move, causing the stop block 22 to move to a first position relative to the connecting seat 1, the stop block 22 is located in the movable clearance area 31, and there is a non-contact gap between the stop block 22 and the support rod 2; the support rod 2 can rotate relative to the connecting part 110; When the pull rod 21 is not driven, the elastic member 23 abuts against the stop block 22 and the connecting seat 1 to keep the stop block 22 in the anti-rotation zone 32. That is, when the stop member 20 is in the second position relative to the connecting seat 1, the stop block 22 restricts the relative rotation of the support rod 2 and the connecting part 110.

[0081] In some embodiments, the elastic element 23 is a cylindrical spring that sleeves the outer wall of the pull rod 21.

[0082] Please refer to Figure 7 - Figure 10 The stop member 20 further includes a stop block sleeve 25 and a limiting washer 26; the stop block sleeve 25 is at least partially sleeved on the pull rod 21; the pull rod 21 is slidably connected to the sliding through hole 150 through the stop block sleeve 25; the stop block 22 is connected to the pull rod 21 and / or the stop block sleeve 25; the outer diameter of the limiting washer 26 is larger than the sliding through hole 150; the inner hole of the limiting washer 26 is sleeved on the pull rod 21; the stop part 24 is a pull cap with an outer diameter larger than the inner hole of the limiting washer 26.

[0083] This design enhances the ease of maintenance of the stop 20, allowing for individual replacement of worn parts. Without the stop sleeve 25 and limit shim 26, the pull rod 21 would become loose with the connecting seat 1, indirectly affecting the pull rod's lifting function and user experience.

[0084] Please refer to Figure 6 - Figure 8 Each set of support rods 2 consists of two rods. The two support rods 2 are located near one end of the rotation area 30, and their lengths extending into the rotation area 30 are set according to their correspondence with the movable avoidance area 31 and the anti-rotation area 32.

[0085] A support rod 2, extending a greater length into the rotation zone 30, forms an anti-rotation zone 32. This design is ingenious.

[0086] When there are two support rods 2 in each group, the connecting module 12 is provided with screw holes in two layers at the ends of the two support rods 2, so as to realize the staggered layout of the upper and lower support rods 2 and enable the upper and lower support rods 2 to rotate to a plane or fold.

[0087] Please refer to Figure 1 - Figure 17 It also includes a frame 200 and wheels 9; the frame 200 includes a pole 10 and a scissor-type telescopic frame 11; the lower end of the pole 10 is connected to the fixed position of the connecting module 12; the wheels 9 are connected to the chassis 100 or the frame 200.

[0088] In this embodiment, the fixing position of the connecting module 12 is a sleeve hole, which is sleeved onto the lower outer wall of the connecting rod 10.

[0089] In a preferred embodiment, the wheel 9 is detachably connected to the lower end of the upright 10.

[0090] The number of uprights 10 and scissor-type telescopic frames 11 can both be four. The four scissor-type telescopic frames 11 constitute the four sides of the frame 200.

[0091] Each set of two support rods 2 has its ends connected to the same corresponding connecting module 12. In this embodiment, the connecting module 12 is fixed in a bayonet structure, which accommodates the ends of the support rods 2. Furthermore, the ends of the support rods 2 are deformed from round tubes into flat tubes, extending into the bayonet of the connecting module 12. The two wall panels constituting the bayonet structure are provided with screw holes in two layers, upper and lower.

[0092] In the specification and claims of this application, the terms "comprising / including" and "having / including" and variations thereof are used to specify the presence of the stated features, values, steps or components, but do not exclude the presence or addition of one or more other features, values, steps, components or combinations thereof.

[0093] Some features of this invention are described in different embodiments for clarity; however, these features may also be described in combination in a single embodiment. Conversely, some features of this invention are described only in a single embodiment for brevity; however, these features may also be described individually or in any suitable combination in different embodiments.

[0094] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vehicle with a chassis designed to prevent accidental folding, characterized in that, Includes a chassis, said chassis comprising: The connecting seat has at least a plurality of connecting parts on its bottom surface; The support rods are provided in at least four sets, distributed at the four corners of the connecting seat; one end of each support rod is rotatably connected to the connecting part, and at least four sets of support rods are rotatable relative to the connecting seat to a plane or folded; the other end of each support rod is used to connect to the vehicle frame. A stop member is provided, which is adjustablely connected to the connecting seat. When the stop member moves to a first position relative to the connecting seat, the support rod can rotate relative to the connecting part. When the stop member is in a second position relative to the connecting seat, the stop member restricts the relative rotation of the support rod and the connecting part. The connecting module has multiple fixed positions; the end of the support rod away from the connecting seat is rotatably connected to the fixed position of the connecting module.

2. A vehicle with a chassis designed to prevent accidental folding, as described in claim 1, characterized in that, The support rod has a rotation area at one end opposite to the support rod end. The rotation area includes a connected movable clearance area and an anti-rotation area. The connecting seat has a sliding through hole corresponding to the position of the rotation area. The stop member includes a pull rod, a stop block, and an elastic member. The pull rod is slidably connected to the sliding through hole. The stop block is connected to one end of the pull rod. The other end of the pull rod extends out of the sliding through hole and has a stop portion to prevent the pull rod from disengaging from the connecting seat. One end of the elastic member abuts against the stop block, and the other end abuts against the connecting seat to keep the stop block located in the anti-rotation area. When the pull rod is driven to move, causing the stop block to move to a first position relative to the connecting seat, the stop block is located in the movable clearance area, and there is a non-contact gap between the stop block and the support rod; the support rod can rotate relative to the connecting part; When the pull rod is not driven, the elastic element abuts against the stop block and the connecting seat to keep the stop block in the anti-rotation zone. That is, when the stop element is in the second position relative to the connecting seat, the stop block restricts the relative rotation of the support rod and the connecting part.

3. A vehicle with a chassis designed to prevent accidental folding, as described in claim 2, characterized in that... The stop component further includes a stop block sleeve and a limiting washer; the stop block sleeve at least partially sleeves the pull rod; the pull rod is slidably connected to the sliding through hole through the stop block sleeve; the stop block is connected to the pull rod and / or the stop block sleeve; the outer diameter of the limiting washer is larger than the sliding through hole; the inner hole of the limiting washer sleeves the pull rod; the stop portion is a pull cap with an outer diameter larger than the inner hole of the limiting washer.

4. A vehicle with a chassis designed to prevent accidental folding, as described in claim 2, characterized in that, Each set of support rods consists of two rods, with one end of each support rod adjacent to the rotation area. The length of the support rod extending into the rotation area is set according to its correspondence with the movable avoidance area and the anti-rotation area.

5. A vehicle with a chassis designed to prevent accidental folding, as described in claim 1, characterized in that, It includes an additional connecting block and an additional reinforcing rod; the connecting seat has at least two detachable connecting positions on its bottom surface; the additional connecting block is detachably connected to the detachable connecting positions; the detachable connecting positions are located between the two connecting parts; one end of the additional reinforcing rod is rotatably connected to the additional connecting block; At least two of the additional reinforcing rods are rotatable relative to the connecting seat to a plane or folded; the other end of the additional reinforcing rod is at least rotatably connected to the frame.

6. A vehicle with a chassis designed to prevent accidental folding, as described in claim 1, characterized in that, The connecting seat is provided with a rotation clearance hole at the end corresponding to the support rod.

7. A vehicle with a chassis designed to prevent accidental folding, as described in claim 5, characterized in that, Includes a connector, wherein the end of the additional reinforcing rod away from the additional connecting block is rotatably connected to the frame via the connector; when the support rod and the additional reinforcing rod are both rotated relative to the connecting seat to a plane, the connector is also used to support the additional reinforcing rod.

8. A vehicle with a chassis designed to prevent accidental folding, as described in claim 5, characterized in that, The additional connecting block is provided with a docking limiting rail, and the connecting seat is provided with a docking connecting groove to match the docking limiting rail; the connecting seat and the additional connecting block are detachably connected by screws.

9. A vehicle with a chassis designed to prevent accidental folding, as described in any one of claims 1 to 8, characterized in that, It also includes a frame and wheels; the frame includes a pole and a scissor-type telescopic frame; the lower end of the pole is connected to the fixed position; the wheels are connected to the chassis or the frame.

10. A vehicle with a chassis designed to prevent accidental folding, as described in claim 9, characterized in that, The scissor-type telescopic frame includes multiple rotatably connected support rods, and at least some of the support rods are provided with damping hinges at their connection points.

11. A vehicle with a chassis designed to prevent accidental folding, as described in claim 9, characterized in that, The system includes a reinforcing connecting rod; an extension frame is rotatably connected to one side of the frame; connecting sleeves are provided at the upper ends of the two uprights adjacent to the extension frame, one end of which is used to connect to the scissor-type telescopic frame, and the other end is provided with a rotating connecting pin; both ends of the reinforcing connecting rod are rotatably connected to the rotating connecting pin, and at least one end of the reinforcing connecting rod is provided with an open connecting hook, which can be disengaged from the rotating connecting pin; the reinforcing connecting rod includes an inner tube, an outer tube sleeved on the inner tube, and a locking member that keeps the inner tube and the outer tube relatively fixed; the inner tube and the outer tube are telescopically slidably connected; a limiting groove is provided on the side wall of the outer tube, and a limiting protrusion is provided in the limiting groove and connected to the inner tube.

Images