A new type of hand-pulled folding cart

Abstract

The present invention discloses a novel hand-pulled folding cart, which comprises front and rear columns on the left and right sides, front and rear X-shaped folding frames, first and second side folding frames, a folding base, and front and rear wheels. Upper and lower hinge seats are correspondingly fixed on the front and rear columns on the left and right sides. The upper part of the front and rear X-shaped folding frames is hinged to the upper hinge seats, and the lower part of the front and rear X-shaped folding frames is hinged to the lower hinge seats. The folding base comprises a main connecting rod, main and sub-hinge seats, front and rear base connecting rods, diagonal telescopic rods, and a pull rod. The main and sub-hinge seats are hinged to both ends of the main connecting rod. The front and rear base connecting rods are hinged to the main hinge seat and the lower hinge seat. The diagonal telescopic rods are hinged to the main hinge seat and the lower hinge seat. One end of the pull rod is hinged to the sub-hinge seat, and the other end is connected to the first side folding frame. After adopting the above structure, it has the advantages of reasonable structural design, simple folding operation, stable and reliable use, large load capacity, small folding volume, convenient loading, unloading and carrying of goods, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of hand carts, in particular to a novel hand-foldable cart that is quick to fold, small in volume, and convenient to carry. Background Art

[0002] With the rapid development of outdoor camping in our country, in order to facilitate the field handling of activities such as self-driving tours and suburban camping, many consumers use hand carts as handling tools. Various items can be directly placed on the hand cart and towed, which can solve the trouble of consumers carrying large and small bags in their hands and greatly facilitate consumers. However, the following problems exist in the current hand carts on the market: First, due to the limitation of the external shape and volume, the existing folding hand carts can hold fewer goods and can no longer meet the requirements of consumers for storing items. Second, the structure is unreasonable, the mechanical strength is low, the load capacity is small, the overall structural stability is poor, the use is unreliable, and it cannot adapt to the rough field roads for towing. Third, the loading and unloading of goods is inconvenient. In response to the above problems, many manufacturers and people of insight have carried out development and trial production, but so far, no ideal product has been introduced to the market. Summary of the Invention

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a novel hand-foldable cart with a reasonable structural design, simple folding operation, stable and reliable use, large load capacity, small folding volume, and convenient loading, unloading and carrying of goods.

[0004] The technical solution adopted by the present invention to solve its technical problems includes front and rear columns on the left and right sides, front and rear X-folded frames, a first side-folded frame and a second side-folded frame correspondingly connected between the front and rear columns on the left and right sides, a folding base, and front and rear wheels. Upper and lower hinge seats are correspondingly fixed on the left and right front and rear columns. The upper part of the front and rear X-folded frames is correspondingly hinged to the upper hinge seats of the front and rear columns on the left and right sides through front and rear telescopic rods, and the lower part of the front and rear X-folded frames is correspondingly hinged to the lower hinge seats of the front and rear columns on the left and right sides. The folding base includes a main connecting rod, a main and auxiliary hinge seat, front and rear base connecting rods, diagonal telescopic rods, and a pull rod. The main and auxiliary hinge seats are correspondingly hinged to both ends of the main connecting rod. The front and rear base connecting rods are correspondingly hinged to the lower hinge seats between the main hinge seat and the corresponding front and rear columns. The diagonal telescopic rods are correspondingly hinged to the lower hinge seats between the main hinge seat and the corresponding front and rear columns. The lower end of the pull rod is hinged to the auxiliary hinge seat, and the upper end is connected to the first side-folded frame.

[0005] A further solution of the present invention, the first side folding frame includes a front X-shaped rod and a rear X-shaped rod that are cross-connected to each other. The front upper end of the front X-shaped rod is correspondingly hinged to the upper hinge seat of the front upright column, and the front lower end is slidably connected to the front upright column through a fork rod sliding sleeve. The rear upper end of the rear X-shaped rod is correspondingly hinged to the upper hinge seat of the rear upright column, and the rear lower end is slidably connected to the rear upright column through a fork rod sliding sleeve. The rear upper end of the front X-shaped rod and the front upper end of the rear X-shaped rod are hinged to the upper end of the pull rod. The rear lower end of the front X-shaped rod and the front lower end of the rear X-shaped rod are hinged to a pull rod sliding sleeve. The pull rod sliding sleeve is slidably sleeved on the pull rod, and a limiting portion for preventing the pull rod sliding sleeve from sliding upward is provided on the pull rod. When the folding base bears weight, the pull rod and the front and rear X-shaped rods form a stable load-bearing structure.

[0006] A further solution of the present invention, the second side folding frame includes a front and rear connecting rod. One end of the front and rear connecting rod is correspondingly hinged to the upper hinge seats of the front and rear upright columns, and the other ends are respectively connected to quick-release joints. Front and rear support connecting rods are correspondingly hinged on the front and rear connecting rods, and the other ends of the front and rear support connecting rods are slidably and correspondingly connected to the front and rear upright columns through connecting rod sliding sleeves.

[0007] A further solution of the present invention, the quick-release joint includes a knob seat and a lock seat correspondingly fixed on the front and rear connecting rods. A lock hole is provided on the lock seat, and a locking knob cooperating with the lock hole is provided on the knob seat. The knob seat is detachably hinged to the lock seat through the locking knob.

[0008] A further solution of the present invention, the manual folding cart further includes a manual pulling device. The manual pulling device includes a pull handle and a pull handle bracket. The pull handle bracket is correspondingly hinged to the lower hinge seats of the front upright columns on the left and right sides, and the pull handle is adjustably connected to the pull handle bracket.

[0009] A further solution of the present invention, the front and rear wheels are detachably and correspondingly arranged on the lower hinge seats of the front and rear upright columns on the left and right sides. Wheel frames are correspondingly provided on the front and rear wheels, a wheel axle is fixed on the wheel frame, a wheel axle rotating portion is provided on the wheel axle, an elastic button capable of elastic reset is provided on the connecting portion of the lower hinge seat, a through hole cooperating with the wheel axle rotating portion and a locking groove connected to the through hole are provided on the elastic button. When the wheel axle rotating portion cooperates with the through hole, it can be quickly disassembled. When the wheel axle rotating portion cooperates with the locking groove, the wheel axle is locked and can rotate arbitrarily.

[0010] After adopting the above structure, compared with the prior art, there are the following advantages and effects.

[0011] First, since the main hinge seat of the folding base is hinged to the main connecting rod in a one-way foldable manner, the front and rear base connecting rods are hinged to the lower hinge seat between the main hinge seat and the corresponding front and rear columns in a one-way foldable manner, the diagonal telescopic rods are correspondingly hinged to the lower hinge seat between the main hinge seat and the corresponding front and rear columns, the lower end of the pull rod is hinged to the secondary hinge seat, and the upper end is connected to the first side folding frame. When the folding cart is unfolded and used, one side of the folding base plays a good load-bearing role under the action of the main connecting rod, the front and rear base connecting rods, and the diagonal telescopic rods, and the other side of the folding base can play a good load-bearing role in cooperation with the pull rod and the first side folding frame. The folding base has good rigidity, high mechanical strength, good stability, and a large load capacity.

[0012] Second, since the front and rear X-shaped cross rods of the first side folding frame are hinged to each other and correspondingly hinged to the front and rear columns, the front and rear X-shaped cross rods are hinged to the upper end of the pull rod and at the same time slidably sleeved on the pull rod through the pull rod sleeve, and a limiting portion for preventing the pull rod sleeve from sliding upward is provided on the pull rod. When the folding base bears weight, the limiting portion of the pull rod prevents the pull rod from sliding relative to the pull rod sleeve, and the pull rod and the front and rear X-shaped cross rods form a stable hanging weight structure when the folding base bears weight.

[0013] Third, when folding, the front and rear columns, the front and rear X-shaped folding frames, the first side folding frame and the second side folding frame, and the folding base on the left and right sides gather towards the center for folding, which is simple, fast, small in volume, and convenient to carry and store.

[0014] Fourth, since the front and rear connecting rods of the second side folding frame can be connected or opened through quick-release joints, it is more convenient for loading and unloading goods, and the folding base can also be used as a stool.

[0015] Fifth, since the handle bracket is correspondingly hinged to the lower hinge seats of the front columns on the left and right sides, and the handle is adjustably connected to the handle bracket, it is extremely convenient to tow the new type of hand-pulled folding cart.

[0016] Sixth, since the front and rear wheels are quickly detachable and installed on the lower hinge seats, it is simple and convenient to disassemble and swap the front and rear wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram when the present invention is in use.

[0018] Figure 2 For the present invention Figure 1 The top view structural schematic diagram.

[0019] Figure 3 It is another three-dimensional structural schematic diagram when the present invention is in use.

[0020] Figure 4 For the present invention Figure 3 The three-dimensional structural schematic diagram when the quick-release joint is opened.

[0021] Figure 5 This is a schematic exploded view of the quick-release joint of the present invention.

[0022] Figure 6 This is a schematic exploded view of the front and rear wheels of the present invention.

[0023] Figure 7 This is a schematic three-dimensional view of the present invention in a semi-folded state.

[0024] Figure 8 This is a schematic three-dimensional view of the present invention in a folded state.

[0025] Among them, 1 is the front column, 2 is the support link, 3 is the front link, 4 is the handle bracket, 5 is the handle, 6 is the front X-fold frame, 7 is the quick-release joint, 8 is the front telescopic rod, 9 is the rear link, 10 is the upper hinge seat, 11 is the fork rod sliding sleeve, 12 is the rear column, 13 is the rear telescopic rod, 14 is the front X fork rod, 15 is the pull rod, 16 is the limiting part, 17 is the rear X-fold frame, 18 is the rear X fork rod, 19 is the link sliding sleeve, 20 is the lower hinge seat, 21 is the front wheel, 22 is the front base link, 23 is the main hinge seat, 24 is the rear base link, 25 is the main connecting rod, 26 is the diagonal telescopic rod, 27 is the secondary hinge seat, 28 is the rear wheel, 29 is the pull rod sliding sleeve, 30 is the locking knob, 31 is the knob seat, 32 is the lock hole, 33 is the lock buckle seat, 34 is the wheel frame, 35 is the wheel axle, 36 is the wheel axle rotating part, 37 is the spring, 38 is the elastic button, 39 is the through hole, 40 is the locking groove. Detailed implementation mode

[0026] Figures 1 to 8 As shown, this is a specific implementation scheme of a new type of hand-pulled folding cart of the present invention, which includes the front and rear columns 1, 12 on the left and right sides, the front and rear X-fold frames 6, 17, the first side folding frame and the second side folding frame correspondingly connected between the front and rear columns 1, 12 on the left and right sides, the folding base, the front and rear wheels 21, 28. The upper and lower hinge seats 10, 20 are correspondingly fixed on the left and right front and rear columns 1, 12. The upper parts of the front and rear X-fold frames 6, 17 are correspondingly hinged on the upper hinge seats 10 of the front and rear columns 1, 12 on the left and right sides through the front and rear telescopic rods 8, 13, and the lower parts of the front and rear X-fold frames 6, 17 are correspondingly hinged on the lower hinge seats 20 of the front and rear columns 1, 12 on the left and right sides. The folding base includes the main connecting rod 25, the main and secondary hinge seats 23, 27, the front and rear base links 22, 24, the diagonal telescopic rod 26, and the pull rod 15. The main and secondary hinge seats 23, 27 are correspondingly hinged at both ends of the main connecting rod 25. The front and rear base links 22, 24 are correspondingly hinged on the lower hinge seats 20 between the main hinge seat 23 and the corresponding front and rear columns 1, 12. The diagonal telescopic rod 26 is correspondingly hinged on the lower hinge seats 20 between the main hinge seat 23 and the corresponding front and rear columns 1, 12. The lower end of the pull rod 15 is hinged on the secondary hinge seat 27, and the upper end is connected to the first side folding frame.

[0027] To ensure folding and load-bearing, the first side folding frame includes a front X-shaped fork rod 14 and a rear X-shaped fork rod 18 that are cross-connected to each other. The front upper end of the front X-shaped fork rod 14 is correspondingly hinged to the upper hinge seat 10 of the front upright column 1, and the front lower end is slidably connected to the front upright column 1 through a fork rod sliding sleeve 11. The rear upper end of the rear X-shaped fork rod 18 is correspondingly hinged to the upper hinge seat 10 of the rear upright column 12, and the rear lower end is slidably connected to the rear upright column 12 through a fork rod sliding sleeve 11. The rear upper end of the front X-shaped fork rod 14 and the front upper end of the rear X-shaped fork rod 18 are hinged to the upper end of a pull rod 15. The rear lower end of the front X-shaped fork rod 14 and the front lower end of the rear X-shaped fork rod 18 are hinged to a pull rod sliding sleeve 29. The pull rod sliding sleeve 29 is slidably sleeved on the pull rod 15. A limiting portion 16 for preventing the pull rod sliding sleeve 29 from sliding upward is provided on the pull rod 15. When the folding base bears weight, the limiting portion 16 limits the pull rod sliding sleeve 29. The pull rod 15 and the front and rear X-shaped fork rods 14, 18 form a structurally stable load-bearing structure, ensuring that the front and rear X-shaped fork rods 14, 18 do not deform when the pull rod 15 bears weight.

[0028] To facilitate folding, the second side folding frame includes front and rear connecting rods 3, 9. One ends of the front and rear connecting rods 3, 9 are correspondingly hinged to the upper hinge seats 10 of the front and rear upright columns 1, 12, and the other ends are respectively connected to quick-release joints 7. The front and rear connecting rods 3, 9 can be folded through the quick-release joints 7. Front and rear support connecting rods 2 are correspondingly hinged on the front and rear connecting rods 3, 9. The other ends of the front and rear support connecting rods 2 are slidably and correspondingly connected to the front and rear upright columns 1, 12 through connecting rod sliding sleeves 19. The front and rear support connecting rods 2 can improve the connection stability and reliability of the second side folding frame.

[0029] To facilitate loading and unloading of goods and for use as a stool, the quick-release joint 7 includes a knob seat 31 and a lock seat 33 that are correspondingly fixed on the front and rear connecting rods 3, 9. A lock hole 32 is provided on the lock seat 33, and a locking knob 30 that cooperates with the lock hole 32 is provided on the knob seat 31. The knob seat 31 is detachably hinged to the lock seat 33 through the locking knob 30.

[0030] To facilitate use, the manual folding cart further includes a manual pulling device. The manual pulling device includes a pulling handle 5 and a pulling handle bracket 4. The pulling handle bracket 4 is correspondingly hinged to the lower hinge seats 20 of the front upright columns 1 on the left and right sides, and the pulling handle 5 is connected to the pulling handle bracket 4 with an adjustable length.

[0031] To facilitate the replacement and disassembly of the front and rear wheels 21 and 28, the front and rear wheels 21 and 28 are detachably arranged on the lower hinge seats 20 of the left and right front and rear columns 1 and 12 correspondingly. Wheel frames 34 are provided correspondingly on the front and rear wheels 21 and 28. A wheel axle 35 is fixed on the wheel frame 34. A wheel axle rotating part 36 is provided on the wheel axle 35. An elastic button 38 capable of elastic reset is provided on the connecting part of the lower hinge seat 20. A through hole 39 that cooperates with the wheel axle rotating part 36 and a locking groove 40 connected to the through hole 39 are provided on the elastic button 38. When the elastic button 38 is pressed and moves inward against the elastic force of the spring 37, the wheel axle rotating part 36 and the through hole 39 cooperate for quick disassembly. When the elastic button 38 is released, under the elastic force of the spring 37, the elastic button 38 automatically resets. The wheel axle rotating part 36 and the locking groove 40 cooperate to lock the wheel axle 35 and allow it to rotate arbitrarily, thus realizing the quick disassembly and assembly of the front and rear wheels 21 and 28 and the steering function of the universal wheels.

[0032] When the present invention is folded, the main hinge seat 23 is lifted upward. The main hinge seat 23 drives the front and rear base connecting rods 22, 24, the diagonal telescopic rods 26 and the main connecting rod 25 to move upward. While the front and rear base connecting rods 22, 24, the diagonal telescopic rods 26 and the main connecting rod 25 move upward, they drive the front and rear columns 1, 12 and the sub-hinge seat 27 to fold and close. While the front and rear columns 1, 12 and the sub-hinge seat 27 close, they drive the front and rear X-fold frames 6, 17 to fold and close, the front and rear X-shaped rods 14, 18 to fold and close, and the front and rear connecting rods 3, 9 to fold downward. When the front and rear X-shaped rods 14, 18 fold and close, the pull rod sliding sleeve 29 slides downward along the pull rod 15. When the front and rear connecting rods 3, 9 fold downward, the connecting rod sliding sleeve 19 slides downward along the corresponding front and rear columns 1, 12, thus realizing the folding of the front and rear columns 1, 12, the front and rear X-fold frames 6, 17, the first side fold frame and the second side fold frame, and the folding base toward the center.

[0033] As mentioned above, this is only one embodiment of the present invention, and it does not impose any formal restrictions on the present invention. Without departing from the technical solution of the present invention, any simple modification, equivalent change or modification made shall fall within the protection scope of the present invention.

Claims

1. A new type of hand-pulled folding cart, comprising front columns (1) and rear columns (12) on the left and right sides, a front X-shaped folding frame (6), a rear X-shaped folding frame (17), a first side folding frame and a second side folding frame correspondingly connected between the front columns (1) and rear columns (12) on the left and right sides, a folding base, front wheels (21), and rear wheels (28). Upper hinge seats (10) and lower hinge seats (20) are correspondingly fixed on the left and right front columns (1) and rear columns (12). It is characterized in that: The upper parts of the front X-fold frame (6) and the rear X-fold frame (17) are correspondingly hinged to the upper hinge seats (10) of the front columns (1) and the rear columns (12) on the left and right sides through the front telescopic rods (8) and the rear telescopic rods (13). The lower parts of the front X-fold frame (6) and the rear X-fold frame (17) are correspondingly hinged to the lower hinge seats (20) of the front columns (1) and the rear columns (12) on the left and right sides. The folding base includes a main connecting rod (25), a main hinge seat (23), a sub-hinge seat (27), a front base connecting rod (22), a rear base connecting rod (24), a diagonal telescopic rod (26), and a pull rod (15). The main hinge seat (23) and the sub-hinge seat (27) are correspondingly hinged to both ends of the main connecting rod (25). The front base connecting rod (22) and the rear base connecting rod (24) are correspondingly hinged to the lower hinge seats (20) between the main hinge seat (23) and the corresponding front column (1) and rear column (12). The diagonal telescopic rod (26) is correspondingly hinged to the lower hinge seats (20) between the main hinge seat (23) and the corresponding front column (1) and rear column (12). The lower end of the pull rod (15) is hinged to the sub-hinge seat (27), and the upper end is connected to the first side folding frame. The first side folding frame includes a front X-shaped rod (14) and a rear X-shaped rod (18) that are cross-connected to each other. The front upper end of the front X-shaped rod (14) is correspondingly hinged to the upper hinge seat (10) of the front column (1). The front lower end is slidably connected to the front column (1) through a fork rod sliding sleeve (11). The rear upper end of the rear X-shaped rod (18) is correspondingly hinged to the upper hinge seat (10) of the rear column (12). The rear lower end is slidably connected to the rear column (12) through a fork rod sliding sleeve (11). The rear upper end of the front X-shaped rod (14) and the front upper end of the rear X-shaped rod (18) are hinged to the upper end of the pull rod (15). The rear lower end of the front X-shaped rod (14) and the front lower end of the rear X-shaped rod (18) are hinged to a pull rod sliding sleeve (29). The pull rod sliding sleeve (29) is slidably sleeved on the pull rod (15). A limiting portion (16) for preventing the pull rod sliding sleeve (29) from sliding upward is provided on the pull rod (15). When the folding base bears weight, the pull rod (15) and the front X-shaped rod (14) and the rear X-shaped rod (18) form a stable load-bearing structure. The second side folding frame includes a front connecting rod (3) and a rear connecting rod (9). One ends of the front connecting rod (3) and the rear connecting rod (9) are correspondingly hinged to the upper hinge seats (10) of the front column (1) and the rear column (12), and the other ends are respectively connected to quick-release joints (7). Front and rear support connecting rods (2) are correspondingly hinged to the front connecting rod (3) and the rear connecting rod (9). The other ends of the front and rear support connecting rods (2) are slidably correspondingly connected to the front column (1) and the rear column (12) through connecting rod sliding sleeves (19). The manual folding cart further includes a manual device.

2. The novel hand-pulled folding cart according to claim 1, characterized in that: The quick-release joint (7) described above includes a knob seat (31) and a latch seat (33) fixedly corresponding to the front connecting rod (3) and the rear connecting rod (9). A locking hole (32) is provided on the latch seat (33), and a locking knob (30) cooperating with the locking hole (32) is provided on the knob seat (31). The knob seat (31) is detachably hinged to the latch seat (33) through the locking knob (30).

3. The novel hand-pulled folding cart according to claim 1 or 2, characterized in that: The front wheel (21) and the rear wheel (28) described above are detachably provided corresponding to the lower hinge seats (20) of the left and right front uprights (1) and the rear uprights (12). Wheel frames (34) are correspondingly provided on the front wheel (21) and the rear wheel (28). A wheel axle (35) is fixed on the wheel frame (34). A wheel axle rotating part (36) is provided on the wheel axle (35). An elastic button (38) capable of elastic reset is provided on the connecting part of the lower hinge seat (20). A through hole (39) cooperating with the wheel axle rotating part (36) and a locking groove (40) connected to the through hole (39) are provided on the elastic button (38). When the wheel axle rotating part (36) cooperates with the through hole (39), it can be quickly disassembled. When the wheel axle rotating part (36) cooperates with the locking groove (40), the wheel axle (35) is locked and can rotate arbitrarily.

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