Hand pulling type heavy load trailer

Abstract

The invention discloses a hand-pulling type heavy load trailer which comprises a trailer body, unpowered wheels are rotatably arranged in the trailer body, and the hand-pulling type heavy load trailer is characterized in that a cross beam is fixedly arranged at the bottom of the trailer body, steering wheels are rotatably arranged on the two sides of the cross beam, and a steering plate is rotatably arranged in the cross beam; a connecting rod assembly for driving the steering wheel to steer when the steering plate swings is arranged between the steering plate and the steering wheel, a pull rod swinging up and down is rotationally arranged in the steering plate, a swing rod is hinged to one side of the pull rod, a universal wheel is fixed to the bottom of the swing rod, and a power auxiliary assembly is arranged in the vehicle body. The power auxiliary assembly, the battery and the hydraulic station are arranged, enough power can be provided for personnel to manually drag and carry heavy objects, and the situation that the heavy objects can only be dragged through a trailer in the external space is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of heavy-load trailers, in particular to a hand-pulled heavy-load trailer. Background Art

[0002] In the fields of logistics and industrial transportation, heavy-duty trailers are essential tools for transporting heavy goods. However, existing heavy-duty trailers have significant limitations in design and functionality, restricting their application scenarios and operational efficiency.

[0003] Traditional heavy-load trailers typically rely on external power vehicles for towing and lack their own power-assisted systems. This makes manual operation extremely difficult without a towing vehicle. Furthermore, the steering systems of traditional trailers are often bulky and inflexible, resulting in limited maneuverability in confined spaces or when frequent steering is required, increasing operational difficulty and time costs.

[0004] Existing trailer designs also lack space utilization and structural flexibility. For example, components such as the trailer's hook and swing bar cannot be effectively folded and stored when not in use, taking up extra space and potentially posing a safety hazard during transportation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a heavy-duty trailer that can provide power assistance, is flexible in operation and has a compact structure, so as to improve its practicality and efficiency in various application scenarios.

[0006] The present invention is achieved through the following technical solutions: A hand-pulled heavy-load trailer of the present invention includes a vehicle body, wherein a non-powered wheel is provided for rotation in the vehicle body, and is characterized in that a cross beam is fixedly provided at the bottom of the vehicle body, steering wheels are provided for rotation on both sides of the cross beam, a steering plate is provided for rotation in the cross beam, a connecting rod assembly is provided between the steering plate and the steering wheel for driving the steering wheel to turn when the steering plate swings, a pull rod is provided for rotation in the steering plate to swing up and down, a swing rod is hingedly connected to a swing rod on one side of the pull rod, a universal wheel is fixed at the bottom of the swing rod, and a power auxiliary component is provided in the vehicle body.

[0007] According to a further technical solution, a trailer hook is fixedly provided at the end of the pull rod.

[0008] According to a further technical solution, a handle is fixedly provided on the outer surface of the pull rod.

[0009] According to a further technical solution, a damping cylinder is hingedly connected to one side of the pull rod, and a telescopic rod of the damping cylinder is hingedly connected to the swing rod.

[0010] A further technical solution is that a hook is rotatably provided inside the swing arm, and a hook groove is fixedly provided on one side of the pull rod. When the swing arm swings to one side of the pull rod, the hook is hooked in the hook groove, so that the swing arm and the pull rod remain in a folded state.

[0011] According to a further technical solution, a spring is elastically connected between the hook and the outer surface of the swing arm.

[0012] A further technical solution is that the power assist component includes a base fixedly arranged at the bottom of the vehicle body, one side of the base is hingedly connected to a power wheel seat, a power motor is fixedly arranged in the power wheel seat, one side of the power motor is power-connected to a power wheel, and a push rod structure is provided on one side of the vehicle body to drive the power wheel seat to swing.

[0013] A further technical solution is that the push rod structure includes a cylinder seat fixedly arranged in the vehicle body, a cylinder is hingedly connected in the cylinder seat, an articulated seat is fixedly arranged on one side of the push rod of the cylinder, and the articulated seat is rotatably connected to the power wheel seat.

[0014] A further technical solution is that wheel axle seats are rotatably provided on both sides of the crossbeam, the steering wheel is rotatably provided on the wheel axle seat, a steering link is fixedly provided on one side of the wheel axle seat, a connecting rod is movably connected to the steering link, and the connecting rod is movably connected to the steering plate.

[0015] A further technical solution is that the connecting rod includes a mating rod, and the two ends of the mating rod are threadedly connected and fixed with a threaded rod ball head, the ball head portion of the threaded rod ball head is provided with a movable cavity, and an embedded ball head is movably connected in the movable cavity, and a rotating shaft is fixed on the top of the embedded ball head, and the rotating shaft is rotatably connected with the steering connecting rod and the steering plate.

[0016] The beneficial effects of the present invention are: 1. The heavy-duty trailer is provided with a power auxiliary component, a battery and a hydraulic station, which can provide enough power for personnel to manually drag and carry heavy objects, avoiding the need to rely on a trailer in an external space to drag heavy objects, and after the hook is released from the hook groove, the push rod of the damping cylinder can push the swing rod and then swing it, so that the universal wheel rolls against the ground, thereby maintaining the inclined setting of the pull rod, making it more convenient for personnel to drag, and can play a supporting role, making it more labor-saving for personnel to pull the pull rod.

[0017] 2. In the power assist component, after the cylinder works, it can push the cylinder rod. Since the hinged seat is hingedly connected to the power wheel seat, the power wheel seat is swung around the base, so that the power wheel contacts the ground. After the power motor works, it drives the power wheel to rotate, which plays a power assist function, making it easier for people to pull heavy-loaded trailers.

[0018] 3. Before the emergence of this device, it was impossible for people to drag heavy-loaded trailers because the heavy-loaded trailers had a large load and could not be pulled manually. Therefore, a trailer hook was also provided in the device to mount it with the power vehicle in the external space. Moreover, since the swing arm can be stored and folded on one side of the pull rod, the hook is mounted and engaged with the hook groove, which can better connect the device with the power vehicle in the external space.

[0019] 4. The rotating shaft, embedded ball head, movable cavity, threaded rod ball head and matching rod constitute a ball head connecting rod structure that transmits power. It can transmit the steering force of the steering plate, thereby realizing the efficient steering function of the steering wheel in the narrow space under the vehicle. By hingedly connecting the steering plate and the pull rod, it is convenient for people to drag and apply steering force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] For ease of explanation, the present invention is described in detail with reference to the following specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a hand-pulled heavy-load trailer of the present invention; Figure 2 for Figure 1 Schematic diagram at A in the middle; Figure 3 for Figure 1 Schematic diagram at B in the middle; Figure 4 for Figure 1 Schematic diagram of the internal structure of the device; Figure 5 for Figure 4 Schematic diagram at C in the middle; Figure 6 for Figure 1 A schematic diagram of the structure of the device from above; Figure 7 for Figure 6 Schematic diagram at D in the middle; Figure 8 for Figure 6 Schematic diagram at E in the middle; Figure 9 for Figure 8 Schematic diagram at F in the middle; Figure 10 for Figure 8 Schematic diagram of the structure of the middle crossbeam; Figure 11 for Figure 10 Schematic diagram of the structure after the middle movable cavity and the threaded rod ball head are separated; In the figure, the vehicle body 11, the hydraulic station 12, the pull rod 13, the damping cylinder 14, the swing arm 15, the steering wheel 16, the battery 17, the unpowered wheel 18, the steering plate 19, the spring 21, the hook 23, the side plate 24, the universal wheel 25, the hook groove 26, the trailer hook 27, the handle 28, the cylinder 31, the cylinder seat 32, the articulated seat 33, the base 41, the power wheel seat 42, the power motor 43, the power wheel 44, the connecting rod 51, the crossbeam 52, the steering link 61, the wheel axle seat 62, the matching rod 71, the threaded rod ball head 72, the movable cavity 73, the embedded ball head 74, and the rotating shaft 75. DETAILED DESCRIPTION

[0022] like Figures 1-11 As shown, the present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are the same as Figure 1 The up, down, left, right, front and back directions of the projection relationship are consistent. A hand-pulled heavy-load trailer of the present invention includes a body 11, a non-powered wheel 18 is provided for rotation in the body 11, a crossbeam 52 is fixedly provided at the bottom of the body 11, steering wheels 16 are provided for rotation on both sides of the crossbeam 52, a steering plate 19 is provided for rotation in the crossbeam 52, a connecting rod assembly is provided between the steering plate 19 and the steering wheel 16 for driving the steering wheel 16 to turn when the steering plate 19 swings, a pull rod 13 is provided for rotation in the steering plate 19 to swing up and down, a swing rod 15 is hingedly connected to one side of the pull rod 13, a universal wheel 25 is fixed to the bottom of the swing rod 15, and a power auxiliary component is provided in the body 11.

[0023] Advantageously, a trailer hook 27 is fixedly provided at the end of the pull rod 13, and the trailer hook 27 is used for coupling with other power vehicles.

[0024] Advantageously, a handle 28 is fixedly provided on the outer surface of the pull rod 13, and the handle 28 is convenient for people to pull and apply force.

[0025] Advantageously, one side of the pull rod 13 is hingedly connected to the damping cylinder 14 , and one side of the telescopic rod of the damping cylinder 14 is hingedly connected to one side of the swing rod 15 .

[0026] Advantageously, a hook 23 is rotatably provided inside the swing arm 15, and a hook groove 26 is fixedly provided on one side of the pull rod 13. When the swing arm 15 swings to one side of the pull rod 13, the hook 23 is hooked in the hook groove 26, so that the swing arm 15 and the pull rod 13 remain in a folded state.

[0027] Advantageously, a spring 21 is elastically connected between the hook 23 and the outer surface of the swing arm 15, one end of the spring 21 is fixed to the hook 23, and the other end of the spring 21 is fixed to the outer surface of the swing arm 15. When the hook 23 is engaged with the hook groove 26 by means of the spring 21, a pulling force is provided to make the pull rod 13 and the swing arm 15 more stable in the folded state.

[0028] Advantageously, a side plate 24 is fixedly provided on one side of the hook 23 .

[0029] Advantageously, the power assist component includes a base 41 fixedly arranged at the bottom of the vehicle body 11, a power wheel seat 42 is hingedly connected to one side of the base 41, a power motor 43 is fixedly arranged in the power wheel seat 42, a power wheel 44 is power-connected to one side of the power motor 43, the power wheel 44 is driven to rotate by the power motor 43, and a push rod structure is provided on one side of the vehicle body 11 to drive the power wheel seat 42 to swing.

[0030] Advantageously, the push rod structure includes a cylinder seat 32 fixedly arranged in the vehicle body 11, a cylinder 31 is hingedly connected in the cylinder seat 32, an articulated seat 33 is fixedly arranged on one side of the push rod of the cylinder 31, and the articulated seat 33 is rotatably connected with the power wheel seat 42. The articulated seat 33 is driven to telescopically move by the cylinder 31, thereby causing the power wheel seat 42 to swing around the base 41. When the power wheel 44 contacts the ground, the power motor 43 can drive the power wheel 44 to rotate, thereby performing an electric auxiliary function.

[0031] Advantageously, a battery 17 and a hydraulic station 12 are provided on the vehicle body 11 , wherein the battery 17 supplies power to the power motor 43 , and the hydraulic station 12 provides a power source to the cylinder 31 .

[0032] Advantageously, wheel axle seats 62 are rotatably provided on both sides of the crossbeam 52, a wheel hub is rotatably provided on the wheel axle seat 62, a steering wheel 16 is mounted on the wheel hub, a steering link 61 is fixedly provided on one side of the wheel axle seat 62, a connecting rod 51 is movably connected to the steering link 61, and the connecting rod 51 is movably connected to the steering plate 19. The steering plate 19 swings, driving the movement of the connecting rod 51, so that the steering links 61 and the wheel axle seats 62 on both sides swing in the same direction, thereby achieving simultaneous rotation of the wheel axle seat 62 and the steering wheel 16 to realize the steering function.

[0033] Advantageously, the connecting rod 51 includes a mating rod 71, and both ends of the mating rod 71 are threadedly connected and fixed with a threaded rod ball head 72. The threaded section of the threaded rod ball head 72 can be adapted to a locking nut, and the nut is used to abut against the mating rod 71 to keep the length between the threaded rod ball head 72 and the mating rod 71 fixed. A movable cavity 73 is provided at the ball head portion of the threaded rod ball head 72, and an embedded ball head 74 is movably connected in the movable cavity 73. A rotating shaft 75 is fixed on the top of the embedded ball head 74, and the rotating shaft 75 is rotatably connected to the steering connecting rod 61 and the steering plate 19.

[0034] The heavy-load trailer can be driven by the cylinder 31 to extend its internal push rod after working, so that the articulated seat 33 and the power wheel seat 42 are articulated, and the power wheel seat 42 is swung, and the power wheel 44 is in contact with the ground. After the power motor 43 works, the power wheel 44 is driven to rotate, which can provide auxiliary power for the heavy-load trailer, making it easier for personnel to pull it manually.

[0035] After the person holds the handle 28, the person's arm can be in a more comfortable force-applying position due to the hinged connection between the pull rod 13 and the steering plate 19. Due to the elastic damping of the damping cylinder 14, the swing rod 15 is pressed down and contacts the ground with the universal wheel 25, so that when the person pulls the pull rod 13, part of the gravity of the pull rod 13 can be shared, making it easier for the person to pull.

[0036] The provision of the trailer hook 27 allows the trailer hook 27 to be connected and fixed to other power vehicles in the external space to achieve an automatic towing function.

[0037] When the swing arm 15 and the universal wheel 25 are no longer needed, the swing arm 15 is swung to the side of the pull rod 13. During this process, the push rod of the damping cylinder 14 is retracted into the damping cylinder 14, and the hook 23 is engaged in the hook groove 26, so that the swing arm 15 and the universal wheel 25 are not in contact with the ground, thereby realizing the folding function.

[0038] When the heavy-load trailer is powered by electricity, the cylinder 31 pushes out its internal push rod, causing the articulated seat 33 to drive the power wheel seat 42 to flip around the base 41, so that the power wheel 44 contacts the ground. After the power motor 43 works, the power wheel 44 rotates, and the power wheel 44 can play a power-assisting function for the heavy-load trailer.

[0039] When a person pulls the heavy-loaded trailer to turn, since the pull rod 13 is hingedly connected to the steering plate 19, after the pull rod 13 is swung back and forth, the steering plate 19 can be driven to swing back and forth. During this process, one of the connecting rods 51 pushes one of the steering connecting rods 61, and the other connecting rod 51 pulls the other steering connecting rod 61, which causes the wheel structure formed by the steering connecting rod 61, the wheel axle seat 62 and the steering wheel 16 to swing in the same direction, thereby realizing the steering function.

[0040] Since the rotating shaft 75 is rotatably connected with the steering plate 19, the rotating shaft 75 passes through the steering link 61 and is rotatably connected with the steering link 61, and the embedded ball head 74 is movably arranged in the movable cavity 73, the rotating shaft 75, the embedded ball head 74, the movable cavity 73, the threaded rod ball head 72 and the matching rod 71 form a ball head connecting rod structure that transmits power, which can transmit the steering force of the steering plate 19, thereby realizing the efficient steering function of the steering wheel 16 in the narrow space under the vehicle.

[0041] The threaded rod ball head 72 is threadedly connected to the mating rod 71, and the length of the threaded rod ball head 72 relative to the mating rod 71 can be adjusted to make the installation of the connecting rod structure more convenient. After the adjustment is completed, a nut is set on the outer surface of the threaded rod ball head 72 to tighten it with the mating rod 71 to achieve the fixing function of the threaded rod ball head 72 and the mating rod 71.

[0042] The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited to this. Any changes or substitutions that are not conceived through creative work should be included in the scope of protection of the present invention; therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. A hand-pulled heavy-load trailer, comprising a vehicle body (11), wherein a non-powered wheel (18) is provided in the vehicle body (11) for rotation, characterized in that: A crossbeam (52) is fixedly provided at the bottom of the vehicle body (11), and steering wheels (16) are rotatably provided on both sides of the crossbeam (52), and a steering plate (19) is rotatably provided inside the crossbeam (52), and a connecting rod assembly is provided between the steering plate (19) and the steering wheel (16) for driving the steering wheel (16) to steer when the steering plate (19) swings, and a pull rod (13) is rotatably provided inside the steering plate (19) for oscillating up and down, and a swing rod (15) is hingedly connected to one side of the pull rod (13), and a universal wheel (25) is fixed to the bottom of the swing rod (15), and a power auxiliary assembly is provided in the vehicle body (11).

2. A hand-pulled heavy-load trailer according to claim 1, characterized in that: A trailer hook (27) is fixedly provided at the end of the pull rod (13).

3. A hand-pulled heavy-load trailer according to claim 1, characterized in that: A handle (28) is fixedly provided on the outer surface of the pull rod (13).

4. The hand-pulled heavy-load trailer according to claim 1, characterized in that: One side of the pull rod (13) is hingedly connected to a damping cylinder (14), and the telescopic rod of the damping cylinder (14) is hingedly connected to the swing rod (15).

5. The hand-pulled heavy-load trailer according to claim 1, characterized in that: A hook (23) is rotatably provided in the swing lever (15), and a hook groove (26) is fixedly provided on one side of the pull rod (13). When the swing lever (15) swings to one side of the pull rod (13), the hook (23) is hooked in the hook groove (26), so that the swing lever (15) and the pull rod (13) remain in a folded state.

6. A hand-pulled heavy-load trailer according to claim 5, characterized in that: A spring (21) is elastically connected between the hook (23) and the outer surface of the swing rod (15).

7. A hand-pulled heavy-load trailer according to any one of claims 1 to 6, characterized in that: The power auxiliary component comprises a base (41) fixedly arranged at the bottom of the vehicle body (11); one side of the base (41) is hingedly connected to a power wheel seat (42); a power motor (43) is fixedly arranged in the power wheel seat (42); one side of the power motor (43) is power-connected to a power wheel (44); and one side of the vehicle body (11) is provided with a push rod structure for driving the power wheel seat (42) to swing.

8. The hand-pulled heavy-load trailer according to claim 7, characterized in that: The push rod structure includes a cylinder seat (32) fixedly arranged in the vehicle body (11), a cylinder (31) is hingedly connected in the cylinder seat (32), a hinge seat (33) is fixedly arranged on one side of the push rod of the cylinder (31), and the hinge seat (33) is rotatably connected to the power wheel seat (42).

9. A hand-pulled heavy-load trailer according to any one of claims 1 to 6, characterized in that: Wheel axle seats (62) are rotatably provided on both sides of the crossbeam (52), the steering wheel (16) is rotatably provided on the wheel axle seat (62), a steering link (61) is fixedly provided on one side of the wheel axle seat (62), a connecting rod (51) is movably connected to the steering link (61), and the connecting rod (51) is movably connected to the steering plate (19).

10. The hand-pulled heavy-load trailer according to claim 9, characterized in that: The connecting rod (51) comprises a matching rod (71), and threaded rod ball heads (72) are fixedly provided at both ends of the matching rod (71) in a threaded matching connection. A movable cavity (73) is provided at the ball head portion of the threaded rod ball head (72), and an embedded ball head (74) is movably connected in the movable cavity (73). A rotating shaft (75) is fixedly provided at the top of the embedded ball head (74), and the rotating shaft (75) is rotatably matched with the steering connecting rod (61) and the steering plate (19).

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