Hybrid double-trailer logistics vehicle

Abstract

A hybrid double-trailer logistics vehicle comprises a traction vehicle head, a front trailer frame and a rear trailer frame. Traction wheels are arranged at the bottom of the traction vehicle head, and a first saddle is arranged behind the traction vehicle head; the front end of the front trailer frame is connected to the first saddle, a first steering wheel module is connected to the lower portion of the rear end of the front trailer frame, and a second saddle is connected to the lower portion of the rear end of the front trailer frame. And the front end of the rear trailer frame is connected to the second saddle. The front trailer frame and the rear trailer frame are both provided with the steering wheel modules, when the vehicle runs in a curve or a more complex road condition, the angles of the steering wheel modules can be adjusted by controlling steering of all the wheel structures, and all the steering wheel modules can serve as driving wheels according to the road condition; the traction vehicle head, the front trailer frame and the rear trailer frame all have the independent steering and walking capacity, and the trafficability of complex road conditions is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of double-trailers, and in particular to a hybrid double-trailer logistics vehicle. Background Art

[0002] A double trailer is a vehicle that tows two standard semi-trailers in succession behind a standard tractor, or a standard semi-trailer and a mid-axle carriage. The rear of the front semi-trailer will be modified accordingly to tow the rear semi-trailer or mid-axle carriage. This double trailer has the advantages of large transportation capacity, high transportation efficiency and low cost, and is especially suitable for the demand for large quantities of goods in long-distance transportation.

[0003] However, due to its complex structure and long body, the driving difficulty of a double trailer is significantly increased. The driver needs to have higher skills and experience to cope with complex road conditions and emergencies, especially on narrow roads or sharp turns, where the steering difficulty will increase significantly. Therefore, how to increase the flexibility of the double trailer to cope with complex road conditions is an urgent problem to be solved. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention proposes a hybrid double-trailer logistics vehicle, comprising a tractor head, a front trailer frame and a rear trailer frame;

[0005] A traction wheel is provided at the bottom of the tractor head, and a first saddle is provided at the rear of the tractor head;

[0006] The front end of the front trailer frame is connected to the first saddle, the lower part of the rear end of the front trailer frame is connected to the first steering wheel module, and the lower part of the rear end of the front trailer frame is connected to the second saddle;

[0007] The front end of the rear trailer frame is connected to the second saddle, and the rear end of the rear trailer frame is provided with a second steering wheel module;

[0008] Wherein, the first steering wheel module and the second steering wheel module have the same structure, the first steering wheel module or the second steering wheel module comprises four wheel structures connected to the driving component through a clutch device, the driving component is connected to the front trailer frame or the rear trailer frame through a turntable, and the turntable is provided with an angle sensor;

[0009] The driving component can control the steering direction and rotation speed of each wheel structure so that the first steering wheel module or the second steering wheel module forms a predetermined angle with the forward direction.

[0010] Preferably, the four wheel structures are distributed in a rectangular shape, including two left and right wheel structures located in the front and two left and right wheel structures located in the rear, each of the wheel structures is connected to the driving component through an independent clutch device, and the driving component is an electric driving structure.

[0011] Preferably, the driving component comprises four independent motors, each of which is used to drive one of the wheel structures.

[0012] Preferably, the first steering wheel module and the second steering wheel module further include a power storage system, and the power storage system is used to drive the electric drive structure or store electric energy output by the electric drive structure.

[0013] Preferably, it also includes a vehicle-mounted controller and a remote control, which are electrically connected to the angle sensor, the drive component and the clutch device. The vehicle-mounted controller is configured to control the rotation angle of the first steering wheel module and the second steering wheel module and the steering of each wheel structure according to the steering of the steering wheel, and the remote control is configured to separately control the rotation angle of the first steering wheel module and the second steering wheel module and the steering of each wheel structure.

[0014] Preferably, the vehicle-mounted controller is configured to control the rotation angles of the first steering wheel module and the second steering wheel module and the steering of each wheel structure according to the following steps:

[0015] Step 1: Obtain the steering wheel rotation angle A in real time;

[0016] Step 2: Control the wheel structure on the left side and the wheel structure on the right side of the first steering wheel module and the second steering wheel module to rotate in opposite directions, and detect the rotation angle B of each turntable through an angle sensor so that the angle B is equal to the angle A;

[0017] Among them, in step 2, before the steering wheel is returned to the center, keep angle B equal to angle A. When angle B is equal to angle A, the rotation angle of each wheel structure is the same.

[0018] Preferably, the vehicle-mounted controller is configured to control the rotation angles of the first steering wheel module and the second steering wheel module and the steering of each wheel structure according to the following steps:

[0019] Step 1: Obtain the steering wheel rotation angle A in real time;

[0020] Step 2: Control the wheel structure on the left side and the wheel structure on the right side of the first steering wheel module and the second steering wheel module to rotate in opposite directions, and detect the rotation angle B of the turntable in the second steering wheel module and the rotation angle C of the turntable in the first steering wheel module through an angle sensor, so that the angle B is equal to the angle -A, and the angle C is parallel to the length direction of the front trailer frame;

[0021] Among them, in step 2, before the steering wheel is returned to the center, keep angle B equal to angle A. When angle B is equal to angle A, the rotation angle of each wheel structure is the same.

[0022] Preferably, the remote controller is configured to individually control the rotation angle of the first steering wheel module or the second steering wheel module and the steering of each wheel structure.

[0023] Preferably, the bearing surface on the upper surface of the front trailer frame includes a bearing area and a supporting area behind the bearing area, the second steering wheel module is arranged in the supporting area, the bearing surface height of the supporting area is lower than the height of the bearing surface of the bearing area, and the bearing surface height of the rear trailer frame is equal to the height of the bearing surface of the bearing area.

[0024] Preferably, a supporting wheel set is further provided below the supporting area of ​​the front trailer frame, and the supporting wheel set is connected to the front trailer frame via a telescopic structure, and the telescopic structure is used to control the height of the supporting wheel set so that the supporting wheel set can be detached from or in contact with the ground.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] The present invention provides steering wheel modules on both the front trailer frame and the rear trailer frame. The steering wheel modules can independently adjust the rotation direction and serve as an independent power at the same time, so that the vehicle has higher flexibility and can maintain a high pass rate in the face of more complex road conditions. When the vehicle faces a curve or travels on a more complex road condition, the angle of the steering wheel module can be adjusted by controlling the steering of each wheel structure, and each steering wheel module can also be used as a driving wheel according to the road condition, so that the tractor head, the front trailer frame and the rear trailer frame all have the ability to independently turn and travel, greatly improving the passability in complex road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0028] Figure 1 It is a structural schematic diagram of a hybrid double-trailer logistics vehicle shown in the present invention;

[0029] Figure 2 It is a structural schematic diagram of the steering wheel module shown in the present invention. DETAILED DESCRIPTION

[0030] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0031] Combination Figure 1As shown, the present invention proposes a hybrid double-trailer logistics vehicle, including a tractor head 10, a front trailer frame 20 and a rear trailer frame 30. A traction wheel 11 is provided at the bottom of the tractor head 10. The traction wheel 11 has driving and steering functions and is used to drive the entire logistics vehicle forward. Optionally, the traction wheel 11 is driven by an engine as the main driving power of the vehicle.

[0032] The front trailer frame 20 and the rear trailer frame 30 can carry containers or other goods.

[0033] Furthermore, a first saddle 12 is provided at the rear of the tractor head 10 , a front end of the front trailer frame 20 is connected to the first saddle 12 , a second saddle 24 is connected below the rear end of the front trailer frame 20 , and a front end of the rear trailer frame 30 is connected to the second saddle 24 .

[0034] In this way, after the front trailer frame 20 is installed on the first saddle 12, the tractor head 10 and the front trailer frame 20 can rotate relative to each other, that is, when the tractor head 10 turns, as the tractor head 10 rotates, the front trailer frame 20 moves forward as the tractor head 10 turns to the forward direction. Similarly, the rear trailer frame 30 is connected to the front trailer frame 20 through the second saddle 24, and moves along with the front trailer frame 20 as it moves forward or backward.

[0035] As mentioned above, using the tractor head 10 as a power and direction guiding structure is feasible when the turning angle is small or on a straight road, but when the bending angle is large or the situation is more complicated, it is difficult to control the vehicle state. Further, in order to increase the flexibility of the front trailer frame 20 and the rear trailer frame 30.

[0036] A first steering wheel module 21 is connected below the rear end of the front trailer frame 20 , and a second steering wheel module 32 is provided at the rear end of the rear trailer frame 30 .

[0037] Combination Figure 2 As shown, the first steering wheel module 21 and the second steering wheel module 32 have the same structure. The first steering wheel module 21 or the second steering wheel module 32 includes four wheel structures 203 connected to the driving component 201 through a clutch device 202. The driving component 201 is connected to the front trailer frame 20 or the rear trailer frame 30 through a turntable 204. The turntable 204 is provided with an angle sensor 205.

[0038] The driving component 201 can control the direction and rotation speed of each wheel structure 203 so that the first steering wheel module 21 or the second steering wheel module 32 forms a predetermined angle with the forward direction.

[0039] In an optional embodiment, the turntable 204 is provided with a steering lock. Especially when driving at high speed, the turntable 204 should maintain a predetermined angle with the trailer frame, otherwise it is easy to cause instability of the vehicle.

[0040] In this way, by providing the first steering wheel module 21 and the second steering wheel module 32, the front trailer frame 20 and the rear trailer frame 30 are both increased with steering control points, so that the vehicle has a higher control space to deal with complex road conditions.

[0041] Combination Figure 2 As shown, specifically, the four wheel structures 203 are distributed in a rectangular shape, including two left and right wheel structures located in the front and two left and right wheel structures located in the rear. Each wheel structure 203 is connected to the driving component 201 through an independent clutch device 202, and the driving component 201 is an electric driving structure.

[0042] In this way, by using this rectangularly distributed four-wheel structure as a steering module, the reliability of the direction of the steering wheel module can be guaranteed when the vehicle is moving at high speed. At the same time, by controlling the steering of each wheel, the angle of the entire steering wheel module can be changed. For example, if the two sets of wheels on the left rotate backward and the two sets of wheels on the right rotate forward, the entire steering wheel module rotates to the left; for example, if the two sets of wheels on the right rotate backward and the two sets of wheels on the left rotate forward, the entire steering wheel module rotates to the right.

[0043] In a preferred embodiment, the driving component 201 includes four independent motors, each motor is used to drive one wheel structure 203 .

[0044] In this way, each wheel structure 203 is controlled by an independent motor, which can flexibly control the steering and rotation speed of each wheel structure 203, which is conducive to quickly adjusting the first steering wheel module 21 or the second steering wheel module 32 to a predetermined angle.

[0045] Furthermore, the first steering wheel module 21 and the second steering wheel module 32 also include a power storage system, which is used to drive the electric drive structure or store the electric energy output by the electric drive structure.

[0046] In this way, the first steering wheel module 21 or the second steering wheel module 32 not only serves as a steering control point for the front trailer frame 20 and the rear trailer frame 30, but can also serve as a separate driving force. Especially on a slope curve, the first steering wheel module 21 or the second steering wheel module 32 can provide additional power when turning, which not only improves the flexibility of the curve, but also improves the passability of the curve.

[0047] In addition, by connecting the rotation of the wheel structure 203 to the motor through the clutch device 202 at an appropriate time, the motor can be decelerated and the power storage system can be charged at the same time.

[0048] Furthermore, the double-hook logistics vehicle also includes an on-board controller and a remote control, which are electrically connected to the angle sensor 205, the drive component 201 and the clutch device 202. The on-board controller is configured to control the rotation angle of the first steering wheel module 21 and the second steering wheel module 32 and the steering of each wheel structure 203 according to the steering of the steering wheel, and the remote control is configured to separately control the rotation angle of the first steering wheel module 21 and the second steering wheel module 32 and the steering of each wheel structure 203.

[0049] It is understandable that during the driving process, different road conditions may require different flexibility of the vehicle. For example, when the vehicle is parked, if the tractor head 10, the front trailer frame 20 and the rear trailer frame 30 can move synchronously in a certain direction, it will be more conducive to entering or moving out of the parking place. For example, when entering the main road from the freight yard, the space left in front is small. If the rear trailer frame 30 and the tractor head 10 can ensure the synchronization of steering, better passability can be obtained. In addition, for more complex road conditions, the driver and the co-driver are usually required to cooperate in operating the vehicle to make the vehicle pass. Therefore, the coordinated control of the vehicle by the on-board controller and the remote control can meet the different needs of users.

[0050] For example, when the vehicle is parking or moving out of a parking area, the onboard controller is configured to control the rotation angles of the first steering wheel module 21 and the second steering wheel module 32 and the steering of each wheel structure 203 according to the following steps:

[0051] Step 1: Obtain the steering wheel rotation angle A in real time;

[0052] Step 2: Control the wheel structure 203 on the left side and the wheel structure 203 on the right side of the first steering wheel module 21 and the second steering wheel module 32 to rotate in opposite directions, and detect the rotation angle B of each turntable 204 through the angle sensor 205, so that the angle B is equal to the angle A;

[0053] Wherein, in step 2, before the steering wheel is returned to the center, angle B is kept equal to angle A. When angle B is equal to angle A, the rotation angle of each wheel structure 203 is the same.

[0054] Thus, according to the above steps, when the vehicle is moved, the traction wheel 11 of the tractor head 10, the first steering wheel module 21 of the front trailer frame 20 and the second steering wheel module 32 of the rear trailer frame 30 all rotate to the left / right at a predetermined angle and synchronously, and the vehicle can move from front to back in a nearly translational manner. This movement method can reduce the parking / starting distance of the vehicle, that is, it can be parked and started in a smaller space.

[0055] In an optional embodiment, for example, when the vehicle needs to swing the vehicle body 90° in a road condition where there is insufficient space ahead, the onboard controller is configured to control the rotation angles of the first steering wheel module 21 and the second steering wheel module 32 and the steering of each wheel structure 203 according to the following steps:

[0056] Step 1: Obtain the steering wheel rotation angle A in real time;

[0057] Step 2: Control the wheel structure 203 on the left side and the wheel structure 203 on the right side of the first steering wheel module 21 and the second steering wheel module 32 to rotate in opposite directions, and detect the rotation angle B of the turntable 204 in the second steering wheel module 32 and the rotation angle C of the turntable 204 in the first steering wheel module 21 through the angle sensor 205, so that the angle B is equal to the angle -A, and the angle C is parallel to the length direction of the front trailer frame 20;

[0058] Wherein, in step 2, before the steering wheel is returned to the center, angle B is kept equal to angle A. When angle B is equal to angle A, the rotation angle of each wheel structure 203 is the same.

[0059] Thus, according to the above steps, when the vehicle is moved, the traction wheel 11 of the tractor head 10 is turned to the left or right, the first steering wheel module 21 of the front trailer frame 20 is kept consistent with the length of the vehicle body, the second steering wheel module 32 of the rear trailer frame 30 is rotated at the same angle as the traction wheel 11, and is turned in the opposite direction and is in a parallel state. When the vehicle is turned, the front of the vehicle moves to the left (taking the left side as an example), the first steering wheel module 21 in the middle part is kept consistent with the length direction of the vehicle body, and the rear of the vehicle moves to the right, so that the vehicle can turn on the road where the space ahead becomes smaller.

[0060] Furthermore, the remote controller is configured to independently control the rotation angle of the first steering wheel module 21 or the second steering wheel module 32 and the steering of each wheel structure 203 .

[0061] In this way, when facing complex road conditions, the co-driver can control the turning angle and power of the first steering wheel module 21 or the second steering wheel module 32 through the remote control outside the vehicle, so that the vehicle can flexibly pass through complex terrain.

[0062] In the above embodiment, the bearing surface on the upper surface of the front trailer frame 20 includes a bearing area and a supporting area 24 located behind the bearing area. The second steering wheel module 32 is arranged in the supporting area 24, and the bearing surface height of the supporting area 24 is lower than the bearing surface height of the bearing area.

[0063] In this way, the rear trailer frame 30 can maintain the same height as the load-bearing surface of the load-bearing area of ​​the front trailer frame 20 , and the highest points of the goods carried on the front trailer frame 20 and the rear trailer frame 30 are the same.

[0064] Furthermore, a supporting wheel set 22 is provided below the supporting area 24 of the front trailer frame 20. The added supporting wheel set 22 can improve the stability and load-bearing capacity of the vehicle.

[0065] The supporting wheel set 22 is connected to the front trailer frame 20 via a telescopic structure 23, and the telescopic structure 23 is used to control the height of the supporting wheel set 22 so that the supporting wheel set 22 can be separated from or contact the ground.

[0066] In this way, when not driving at high speed, the supporting wheel set 22 can be controlled to leave the ground through the telescopic structure 23, and the first steering wheel module 21 can be used to control the steering of the vehicle to control the angles of the front trailer frame 20 and the rear trailer frame 30.

[0067] In combination with the above embodiments, the present invention provides a steering wheel module on both the front trailer frame and the rear trailer frame. The steering wheel module can independently adjust the rotation direction and serve as an independent power, so that the vehicle has higher flexibility and can maintain a high passing rate in the face of more complex road conditions.

[0068] The wheel structure in each steering wheel module is connected to the driving component through a clutch structure. When the vehicle is driving on a high-speed straight road, the clutch structure is disconnected, and each wheel structure acts as a traction wheel. When the vehicle slows down, it can be connected to the driving component through the clutch structure, and the motor is used to slow down and charge the battery at the same time.

[0069] When the vehicle faces a curve or is driving on a more complex road condition, the angle of the steering wheel module can be adjusted by controlling the steering of each wheel structure. Each steering wheel module can also be used as a driving wheel according to the road conditions, so that the tractor head, front trailer frame and rear trailer frame can all have the ability to steer and move independently, greatly improving the passability of complex road conditions.

[0070] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A hybrid double-trailer logistics vehicle, characterized in that: It comprises a tractor head (10), a front trailer frame (20) and a rear trailer frame (30); A traction wheel (11) is provided at the bottom of the tractor head (10), and a first saddle (12) is provided at the rear of the tractor head (10); The front end of the front trailer frame (20) is connected to the first saddle (12), the lower part of the rear end of the front trailer frame (20) is connected to a first steering wheel module (21), and the lower part of the rear end of the front trailer frame (20) is connected to a second saddle (24); The front end of the rear trailer frame (30) is connected to the second saddle (24), and the rear end of the rear trailer frame (30) is provided with a second steering wheel module (32); The first steering wheel module (21) and the second steering wheel module (32) have the same structure, the first steering wheel module (21) or the second steering wheel module (32) comprises four wheel structures (203) connected to a driving component (201) via a clutch device (202), the driving component (201) is connected to a front trailer frame (20) or a rear trailer frame (30) via a turntable (204), and the turntable (204) is provided with an angle sensor (205); The driving component (201) can control the direction and rotation speed of each wheel structure (203), so that the first steering wheel module (21) or the second steering wheel module (32) forms a predetermined angle with the forward direction.

2. A hybrid double-trailer logistics vehicle according to claim 1, characterized in that: The four wheel structures (203) are distributed in a rectangular shape, including two left and right wheel structures located in the front and two left and right wheel structures located in the rear. Each wheel structure (203) is connected to the driving component (201) via an independent clutch device (202), and the driving component (201) is an electric driving structure.

3. A hybrid double-trailer logistics vehicle according to claim 2, characterized in that: The driving component (201) comprises four independent motors, each of which is used to drive one of the wheel structures (203).

4. A hybrid double-trailer logistics vehicle according to claim 2 or 3, characterized in that: The first steering wheel module (21) and the second steering wheel module (32) further include a power storage system, and the power storage system is used to drive the electric drive structure or store the electric energy output by the electric drive structure.

5. The hybrid double-trailer logistics vehicle according to claim 1, characterized in that: The invention also comprises an on-board controller and a remote controller, wherein the on-board controller and the remote controller are electrically connected to the angle sensor (205), the driving component (201) and the clutch device (202), wherein the on-board controller is configured to control the rotation angle of the first steering wheel module (21) and the second steering wheel module (32) and the steering of each wheel structure (203) according to the steering of the steering wheel, and the remote controller is configured to independently control the rotation angle of the first steering wheel module (21) and the second steering wheel module (32) and the steering of each wheel structure (203).

6. A hybrid double-trailer logistics vehicle according to claim 5, characterized in that: The on-board controller is configured to control the rotation angles of the first steering wheel module (21) and the second steering wheel module (32) and the steering of each wheel structure (203) according to the following steps: Step 1: Obtain the steering wheel rotation angle A in real time; Step 2: Control the wheel structure (203) on the left side and the wheel structure (203) on the right side of the first steering wheel module (21) and the second steering wheel module (32) to rotate in opposite directions, and detect the rotation angle B of each turntable (204) through the angle sensor (205) so that the angle B is equal to the angle A; Wherein, in step 2, before the steering wheel is returned to the correct position, angle B is kept equal to angle A. When angle B is equal to angle A, the rotation angle of each wheel structure (203) is the same.

7. The hybrid double-trailer logistics vehicle according to claim 5, characterized in that: The on-board controller is configured to control the rotation angles of the first steering wheel module (21) and the second steering wheel module (32) and the steering of each wheel structure (203) according to the following steps: Step 1: Obtain the steering wheel rotation angle A in real time; Step 2: Control the wheel structure (203) on the left side and the wheel structure (203) on the right side of the first steering wheel module (21) and the second steering wheel module (32) to rotate in opposite directions, and detect the rotation angle B of the turntable (204) in the second steering wheel module (32) and the rotation angle C of the turntable (204) in the first steering wheel module (21) through the angle sensor (205), so that the angle B is equal to the angle -A, and the angle C is kept parallel to the length direction of the front trailer frame (20); Wherein, in step 2, before the steering wheel is returned to the correct position, angle B is kept equal to angle A. When angle B is equal to angle A, the rotation angle of each wheel structure (203) is the same.

8. The hybrid double-trailer logistics vehicle according to claim 5, characterized in that: The remote controller is configured to independently control the rotation angle of the first steering wheel module (21) or the second steering wheel module (32) and the steering of each wheel structure (203).

9. The hybrid double-trailer logistics vehicle according to claim 1, characterized in that: The load-bearing surface on the upper surface of the front trailer frame (20) comprises a load-bearing area and a supporting area (24) located behind the load-bearing area; the second steering wheel module (32) is arranged in the supporting area (24); the load-bearing surface height of the supporting area (24) is lower than the load-bearing surface height of the load-bearing area; and the load-bearing surface height of the rear trailer frame (30) is equal to the load-bearing surface height of the load-bearing area.

10. A hybrid double-trailer logistics vehicle according to claim 9, characterized in that: A supporting wheel set (22) is also provided below the supporting area (24) of the front trailer frame (20); the supporting wheel set (22) is connected to the front trailer frame (20) via a telescopic structure (23); the telescopic structure (23) is used to control the height of the supporting wheel set (22) so that the supporting wheel set (22) can be detached from or in contact with the ground.

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