Dual steering walkabout variable configuration transporter

Abstract

The application discloses a double-steering hand-held variable-type transport machine, which solves the problem of large turning radius of the existing hand-held variable-type transport machine and difficulty in turning on a narrow road. The hand-held variable-type transport machine comprises a front frame and a rear frame, the front frame is hinged to the rear frame, a turning telescopic cylinder for pushing the front frame to turn is hinged to one side of the front frame and the rear frame, characterized in that a driving mechanism for driving the wheels to turn is arranged on the other side of the front frame and the rear frame, the driving mechanism is connected with a turning structure of a front axle hub of the transport machine, an integrated gearbox is arranged on the rear frame, and the gearbox is connected with a front axle of a front wheel through a front transmission shaft. The double-steering hand-held variable-type transport machine has the advantages that the linkage mechanism is arranged on the front frame and the rear frame, the whole machine is flexible in turning, the turning radius is small, the passing capacity of the vehicle is improved, and the purpose of safe driving is achieved.

Description

Technical Field

[0001] This invention relates to the field of walk-behind convertible conveyors, and more particularly to a dual-steering walk-behind convertible conveyor. Background Technology

[0002] To meet usage requirements, hand-held variable-speed transporters have emerged on the market. These are based on hand-held tractors and then connected to trailers in a chain-link manner. Their main features include the addition of a differential mechanism, which changes the hand-held steering to a steering wheel steering, making it easier for the vehicle to turn.

[0003] When the WT15FS transport aircraft is in use, it adopts a folding turn. The folding turn connects the front and rear frames together through the hinge point. The steering telescopic cylinder pushes the front frame to swing left and right to achieve the folding turn. However, during the turn, because the wheels are in a parallel state with the front frame, the turning radius of the vehicle is too large. On some narrow roads, it is still difficult to turn, making it impossible for the vehicle to turn through. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art by providing a dual-steering hand-held variable transport machine. By installing a linkage mechanism on the front frame and the rear frame, the machine can be flexibly steered and has a small turning radius, thereby improving the vehicle's passability and achieving the purpose of safe driving.

[0005] The technical solution adopted in this invention is: a dual-steering, walk-behind convertible transport machine, including a front frame and a rear frame, wherein the front frame and the rear frame are hinged together, and a steering telescopic cylinder for pushing the front frame to turn is hinged to one side of the front frame and the rear frame. The invention is characterized in that a drive mechanism for driving the wheels to rotate is provided on the other side of the front frame and the rear frame, and the drive mechanism is connected to the steering structure of the front axle hub of the transport machine. An integrated gearbox is provided on the rear frame, and the gearbox is connected to the front axle of the front wheels via a front drive shaft, and the gearbox is connected to the rear axle of the rear wheels via a rear drive shaft.

[0006] As a further improvement, the drive mechanism includes a first linkage rod, a second linkage rod, a linkage member, and a steering arm. The linkage member is rotatably connected to the front frame. One end of the first linkage rod is rotatably connected to the upper part of the rear frame. The other end of the first linkage rod is rotatably connected to the upper end of the linkage member. The lower end of the linkage member is rotatably connected to the second linkage rod. The other end of the second linkage rod is rotatably connected to the steering arm. The steering arm is connected to the steering mechanism of the front axle hub.

[0007] Furthermore, the linkage component includes a linkage shaft, a linkage upper swing arm, and a linkage lower swing arm. The linkage shaft is rotatably connected to the front frame. The first linkage rod is rotatably connected to one end of the linkage upper swing arm. The other end of the linkage upper swing arm is connected to the upper end of the linkage shaft. The lower end of the linkage shaft is connected to one end of the linkage lower swing arm. The other end of the linkage lower swing arm is rotatably connected to the second linkage rod.

[0008] Furthermore, the upper and lower linkage arms are arranged on the same side of the linkage shaft, and the upper and lower linkage arms are arranged in parallel.

[0009] Furthermore, the aforementioned upper swing arm, lower swing arm, and pivot shaft are an integrated structure.

[0010] Furthermore, a pivot sleeve is provided between the linkage pivot and the front frame.

[0011] Furthermore, the number of rear wheels is four, the number of front wheels is two, and the rear wheels and front wheels are evenly distributed on both sides.

[0012] Furthermore, the rear suspension installed on the rear frame is a longitudinal leaf spring type non-independent suspension.

[0013] Beneficial effects

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] In this invention, a dual-steering, walk-behind modified transport machine is described. When the right-side steering telescopic cylinder extends and pushes the front frame to turn left, the rotating shaft sleeve is fixed to the front frame, so the rotating shaft sleeve and the linkage rotating shaft follow the front frame to turn left, causing the distance between the linkage rotating shaft and the rear frame to shorten. Therefore, the fixed-length first linkage rod will push the linkage upper swing arm forward. Since the linkage upper swing arm, linkage rotating shaft, and linkage lower swing arm are an integral structure, the linkage lower swing arm will push the second linkage rod forward. The second linkage rod pushes the steering swing arm to rotate, so as to achieve the purpose of pushing the steering swing arm to turn the front axle wheel hub. The opposite occurs when the steering telescopic cylinder retracts. The machine employs a dual-steering linkage mechanism with both folding steering and front axle hub synchronous steering, achieving flexible steering, a small turning radius, a compact structure, reduced vibration, and efficient transmission. Simultaneously, the front and rear wheel speed control shares the same gearbox, preventing machine damage caused by misoperation leading to asynchronous front and rear drive. This reduces the number of operating levers, making operation simple and convenient, and ensuring synchronous drive for each gear. Furthermore, the transport vehicle uses a four-wheel drive system, exhibiting strong adaptability and passability when traversing roads with poor traction, such as mud or uneven surfaces. This significantly improves the climbing ability of the hand-held modified transporter, making it highly practical and widely applicable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0017] Figure 2 This is a top view of the structure of the present invention;

[0018] Figure 3 This is a top-view structural diagram of the invention during turning;

[0019] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0020] Figure 5 This is an enlarged schematic diagram of the main view of the driving mechanism in this invention;

[0021] Figure 6 This is an enlarged side view of the drive mechanism in this invention.

[0022] Among them: 1-front frame, 2-rear frame, 3-steering telescopic cylinder, 4-drive mechanism, 5-linkage component, 6-gearbox, 7-front drive shaft, 8-rear drive shaft, 9-rear wheel, 10-front wheel, 11-rear suspension, 12-front axle hub, 41-steering swing arm, 42-second linkage rod, 43-first linkage rod, 51-linkage upper swing arm, 52-rotating shaft sleeve, 53-linkage rotating shaft, 54-linkage lower swing arm. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0024] See Figure 1-6As shown, a dual-steering, walk-behind convertible transport machine of the present invention includes a front frame 1 and a rear frame 2, which are hinged together. A steering telescopic cylinder 3 for turning the front frame 1 is hinged to one side of the front frame 1 and the rear frame 2. A drive mechanism 4 for driving the wheels is provided on the other side of the front frame 1 and the rear frame 2. The drive mechanism 4 is connected to the steering structure of the front axle hub 12 of the transport machine. An integrated gearbox 6 is provided on the rear frame 2. The gearbox 6 is connected to the front axle of the front wheel 10 via a front drive shaft 7, and to the rear axle of the rear wheel 9 via a rear drive shaft 8. Using the same set of gearboxes 6 to drive the front and rear wheels avoids machine damage caused by asynchronous front and rear drive due to misoperation. It reduces the number of operating handles, achieving convenient and simple operation and synchronous drive for each gear. Furthermore, the transport vehicle adopts a four-wheel drive system. When traversing roads with poor adhesion, such as muddy or uneven roads, it exhibits strong adaptability and passability, significantly improving the climbing ability of the hand-held modified transport vehicle. When the hand-held modified transport vehicle turns left, the right steering telescopic cylinder 3 extends to push the front frame 1 to turn left. Since the pivot sleeve 52 is fixed to the front frame, the pivot sleeve 52 and the linkage pivot 53 follow the front frame 1 to turn left, causing the distance between the linkage pivot 53 and the rear frame 2 to shorten. Therefore, the fixed-length first linkage rod 43 will push the linkage upper swing arm 51 forward. Because the linkage upper swing arm 51, linkage pivot 53 and linkage lower swing arm 54 are an integrated structure, the linkage lower swing arm 51 will push the second linkage rod 42 forward. The second linkage rod 42 pushes the steering swing arm 41 to rotate, thereby pushing the steering swing arm 41 to turn the front axle hub 12. The retraction of the steering telescopic cylinder 3 will reverse the process. The drive mechanism 4 and the steering telescopic cylinder 3 form a dual steering linkage mechanism. The dual steering linkage mechanism adopts the bending steering and the front axle hub 12 synchronous steering to achieve the purpose of flexible steering, small turning radius, compact structure, reduced vibration and efficient transmission.

[0025] Specifically, the drive mechanism 4 includes a first linkage rod 43, a second linkage rod 42, a linkage member 5, and a steering arm 41. The linkage member 5 is rotatably connected to the front frame 1. One end of the first linkage rod 43 is rotatably connected to the upper part of the rear frame 2, and the other end of the first linkage rod 43 is rotatably connected to the upper end of the linkage member 5. The lower end of the linkage member 5 is rotatably connected to the second linkage rod 42, and the other end of the second linkage rod 42 is rotatably connected to the steering arm 41. The steering arm 41 is connected to the steering mechanism of the front axle hub 12.

[0026] Preferably, the linkage 5 includes a linkage shaft 53, a linkage upper swing arm 51, and a linkage lower swing arm 54. The linkage shaft 53 is rotatably connected to the front frame 1. The first linkage rod 43 is rotatably connected to one end of the linkage upper swing arm 51. The other end of the linkage upper swing arm 51 is connected to the upper end of the linkage shaft 53. The lower end of the linkage shaft 53 is connected to one end of the linkage lower swing arm 54. The other end of the linkage lower swing arm 54 is rotatably connected to the second linkage rod 42.

[0027] Furthermore, the upper control arm 51 and the lower control arm 54 are arranged on the same side of the linkage shaft 53, and the upper control arm 51 and the lower control arm 54 are arranged in parallel. When the first linkage rod 43 pushes the upper control arm 51 forward, the lower control arm 54 will also rotate forward, thereby pushing the steering arm 4 and causing the front axle wheel hub 12 to rotate at a certain angle. This results in a small turning radius, allowing the vehicle to turn on narrow roads and increasing the vehicle's practicality.

[0028] Furthermore, the upper swing arm 51, the lower swing arm 54, and the pivot shaft 53 are integrated into a single structure, which reduces the generation of welding stress in the later stage and avoids easy breakage at the connection.

[0029] Furthermore, a pivot sleeve 52 is provided between the linkage shaft 53 and the front frame 1 to prevent the linkage shaft 53 from being directly rotated and connected to the front frame 1, which would cause wear on the front frame 1 and result in the hole at the connection being too large, making it impossible to securely install the linkage shaft 53. The pivot sleeve 52 serves as a protective element.

[0030] Furthermore, there are four rear wheels 9 and two front wheels 10. The rear wheels 9 and front wheels 10 are evenly distributed on both sides. The rear wheels 9 are configured with two on each side, which is beneficial for the transport vehicle to carry heavier goods.

[0031] Furthermore, the rear suspension 11 installed on the rear frame 2 is a longitudinal leaf spring type non-independent suspension, which is conducive to appropriately increasing the track width with the front wheel 10, so as to achieve smooth and safe driving under load.

[0032] In this embodiment, a dual-steering walk-behind convertible transporter uses the same gearbox 6 to drive the front and rear wheels, avoiding machine damage caused by asynchronous front and rear drive due to misoperation. It reduces the number of operating levers, making operation convenient and simple, and ensuring synchronized drive in each gear. Furthermore, the transporter employs a four-wheel drive system, exhibiting strong adaptability and passability when traversing roads with poor traction, such as mud or uneven surfaces, significantly improving the walk-behind convertible transporter's climbing ability. When the walk-behind convertible transporter turns left, the right-side steering telescopic cylinder 3 extends to push the front frame. 1. When turning left, since the pivot sleeve 52 is fixed to the front frame, the pivot sleeve 52 and the linkage pivot 53 follow the left turn of the front frame 1, causing the distance between the linkage pivot 53 and the rear frame 2 to shorten. Therefore, the fixed-length first linkage rod 43 will push the linkage upper swing arm 51 forward. Because the linkage upper swing arm 51, linkage pivot 53, and linkage lower swing arm 54 are an integral structure, the linkage lower swing arm 51 will push the second linkage rod 42 forward. The second linkage rod 42 will push the steering swing arm 41 to rotate, thereby pushing the steering swing arm 41 to turn the front axle hub 12. The retraction of the steering telescopic cylinder 3 will reverse the process. This invention provides a dual-steering hand-held variable transport machine, which adopts a dual-steering linkage mechanism with folding steering and synchronous steering of the front axle hub 12. This can reduce the turning radius of the vehicle, thus enabling smooth passage. It adopts front and rear four-wheel drive, achieving the purpose of high torque, strong load-bearing capacity, and easy maintenance.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A dual-steering, walk-behind convertible conveyor, characterized in that, The vehicle includes a front frame (1) and a rear frame (2), the front frame (1) and the rear frame (2) being hinged together. A steering telescopic cylinder (3) for turning the front frame (1) is hinged to one side of the front frame (1) and the rear frame (2). The vehicle is characterized in that a drive mechanism (4) for driving the wheels is provided on the other side of the front frame (1) and the rear frame (2). The drive mechanism (4) is connected to the steering structure of the front axle hub (12) of the transport vehicle. An integrated gearbox (6) is provided on the rear frame (2). The gearbox (6) is connected to the front axle of the front wheel (10) via a front drive shaft (7). The gearbox (6) is connected to the rear axle of the rear wheel (9) via a rear drive shaft (8). The drive mechanism (4) includes a first linkage (43), a second linkage (42), a linkage (5), and a steering swing arm (41). The linkage (5) is rotatably connected to the front frame (1). One end of the linkage rod (43) is rotatably connected to the upper part of the rear frame (2), the other end of the first linkage rod (43) is rotatably connected to the upper end of the linkage component (5), the lower end of the linkage component (5) is rotatably connected to the second linkage rod (42), the other end of the second linkage rod (42) is rotatably connected to the steering arm (41), the steering arm (41) is connected to the steering mechanism of the front axle hub (12), the linkage component (5) includes a linkage shaft (53), a linkage upper arm (51), and a linkage lower arm (54), the linkage shaft (53) is rotatably connected to the front frame (1), the first linkage rod (43) is rotatably connected to one end of the linkage upper arm (51), the other end of the linkage upper arm (51) is connected to the upper end of the linkage shaft (53), the lower end of the linkage shaft (53) is connected to one end of the linkage lower arm (54), and the other end of the linkage lower arm (54) is rotatably connected to the second linkage rod (42).

2. The dual-steering walk-behind convertible conveyor according to claim 1, characterized in that, The upper linkage arm (51) and the lower linkage arm (54) are arranged on the same side of the linkage shaft (53), and the upper linkage arm (51) and the lower linkage arm (54) are arranged in parallel.

3. A dual-steering, walk-behind convertible conveyor according to claim 1, characterized in that, The upper swing arm (51), lower swing arm (54), and pivot (53) are integrated into one unit.

4. A dual-steering walk-behind convertible conveyor according to claim 1, characterized in that, A pivot sleeve (52) is provided between the linkage pivot (53) and the front frame (1).

5. A dual-steering, walk-behind convertible conveyor according to claim 1, characterized in that, The number of rear wheels (9) is four, the number of front wheels (10) is two, and the rear wheels (9) and front wheels (10) are evenly distributed on both sides.

6. A dual-steering, walk-behind convertible conveyor according to claim 1, characterized in that, The rear suspension (11) installed on the rear frame (2) is a longitudinal leaf spring type non-independent suspension.

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