CN111688823A

CN111688823A - Foldable truck bottom flow guide and resistance reduction device

Info

Publication number: CN111688823A
Application number: CN202010576646.XA
Authority: CN
Inventors: 高伟; 余伟; 邓召文; 余思家; 易强; 孔昕昕; 石振; 金家琛
Original assignee: Hubei University of Automotive Technology
Current assignee: Hubei University of Automotive Technology
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-09-22
Anticipated expiration: 2040-06-22
Also published as: CN111688823B

Abstract

The invention discloses a foldable wagon bottom flow guiding and resistance reducing device which comprises a bottom flow guiding and resistance reducing device, wherein the bottom flow guiding and resistance reducing device is in a hollow folding structure form, and is fixed at the bottom of a wagon and used for reducing the air resistance at the bottom of the wagon. The invention has simple structure, can realize the functions of extension and folding, occupies small space and does not influence the ground clearance of the whole vehicle. The device can improve the aerodynamic performance of the bottom of the truck, reduces the air resistance of the bottom of the truck, provides a new idea for drag reduction of the bottom of the truck, and has a good application prospect.

Description

Foldable truck bottom flow guide and resistance reduction device

Technical Field

The invention belongs to the technical field of vehicles, relates to a truck, and particularly relates to a foldable truck bottom flow guide and resistance reduction device.

Background

Cargo vehicles, commonly referred to as trucks, also known as lorries, refer to vehicles primarily used for transporting cargo, and sometimes to vehicles that can tow other vehicles, and are a category of commercial vehicles. Generally, the vehicle can be divided into a heavy vehicle and a light vehicle according to the weight of the vehicle. Most trucks use a diesel engine as a power source, but some light trucks use gasoline, petroleum gas, or natural gas.

The main problems and drawbacks of the prior art include:

when the automobile runs on the road surface, the automobile always receives rolling resistance and air resistance. The research shows that: the lower body resistance of a towed trailer accounts for approximately 30% of the total vehicle resistance. In addition, the increase of the running resistance increases the fuel consumption of the whole vehicle, and CO₂The discharge becomes greater. In order to solve the adverse effects of overlarge running resistance, energy waste and environmental pollution, the reduction of the resistance of the bottom of the truck is particularly important.

The chinese utility model patent with publication number "CN 207889849U" discloses a resistance reducing device for the bottom of a truck, which comprises a long V-shaped air guide sleeve fixed on the bottom plate of the truck between the front wheel and the rear wheel of the truck, the top end of the long V-shaped air guide sleeve faces the direction of the truck head, the long V-shaped air guide sleeve comprises 2 slender air guide strips forming an included angle of 20-30 degrees, although the utility model can effectively reduce the air resistance of the bottom of the truck and reduce the balance resistance, the stability and the safety of the truck under high-speed driving are improved; however, the V-shaped air guide sleeve arranged at the bottom is too high, so that the ground clearance of the whole vehicle is reduced, and the vehicle is blocked when running on a road surface with thick accumulated snow; meanwhile, the running resistance of the automobile can be increased when the automobile runs at a low speed; the applicability of this device is poor and therefore needs to be improved.

Disclosure of Invention

Aiming at the problems and the defects in the prior art, the invention provides the foldable wagon bottom flow guiding and resistance reducing device which is simple in structure, capable of realizing the functions of stretching and folding, small in occupied space and free of influencing the ground clearance of the whole wagon. The device can improve the aerodynamic performance of the bottom of the truck, reduces the air resistance of the bottom of the truck, provides a new idea for drag reduction of the bottom of the truck, and has a good application prospect.

Therefore, the invention adopts the following technical scheme:

the foldable wagon bottom flow guiding and resistance reducing device comprises a bottom flow guiding and resistance reducing device, wherein the bottom flow guiding and resistance reducing device is in a hollow folding structure form, and the bottom flow guiding and resistance reducing device is fixed at the bottom of a wagon and used for reducing air resistance at the bottom of the wagon.

Further, the bottom flow-guiding and resistance-reducing device comprises a bottom plate, a slope plate, a side skirt, a transmission device and a motor; the bottom plate is fixedly connected with the bottom of the truck, the side skirts are positioned on two sides of the bottom plate, and the side skirts are connected with the side surfaces of the bottom plate through spring hinges; one end of the slope plate is connected with the bottom plate through a movable shaft, the other end of the slope plate is connected with the bottom plate through a transmission device, and the transmission device drives the slope plate to rotate around the movable shaft; the motor is fixed on the transmission device and used for driving the transmission device.

Preferably, the transmission device comprises a connecting rod, a transmission device base, a threaded rod, a transmission device top seat and a connecting joint, wherein the transmission device base is fixedly connected with the bottom plate, and the transmission device top seat is fixedly connected with the slope plate; the connecting joint is connected with the transmission top seat through a shaft, the connecting joint is connected with the transmission base through a connecting rod and a threaded rod, and the threaded rod is located between the connecting rods and used for driving the connecting rods to extend and compress the transmission.

Preferably, the switch of the motor is controlled by a button of the cab, and the rotation of the motor drives the threaded rod to rotate, so that one section of the connecting rod is folded and extended, and the slope plate is pushed to rotate around the movable shaft.

Preferably, a spring hinge is used to allow the side skirt to fold up under the spring force.

Preferably, the bottom diversion and resistance reduction device has two states, namely a folded state and an unfolded state; the ground clearance in the folded state is equivalent to the original ground clearance, and the unfolded state is used for reducing the air resistance of the bottom of the truck.

Preferably, the bottom diversion and resistance reduction device is made of composite materials.

Preferably, the composite material comprises glass fibers for withstanding frequent impacts and meeting the requirement of light weight.

Compared with the prior art, the invention has the beneficial effects that:

(1) the device simple structure, the suitability is strong, can install in any model freight train bottom extensively. When the device is used, the device is unfolded, so that the air resistance at the bottom of the truck can be effectively reduced, and the stability and the safety of the truck in high-speed running are improved; when not in use, the folding wagon can be folded, so that the passing performance of the wagon is better.

(2) The device can realize the functions of stretching and folding, occupies small space and does not influence the ground clearance of the whole vehicle.

(3) The device is convenient to use, and the height of the telescopic support is controlled by the movement of the screw rod which drives the telescopic support through the motor.

(4) The device improves the aerodynamic performance of the bottom of the truck and has good application prospect.

(5) The device has low manufacturing cost, can effectively reduce the air resistance at the bottom of the truck, and can prevent the airflow caused by crosswind from crossing the bottom of the truck.

Drawings

Fig. 1 is a schematic structural diagram of a foldable truck bottom diversion fairing provided by the invention.

Fig. 2 is a schematic structural diagram of the foldable wagon bottom diversion fairing provided by the invention when unfolded.

Fig. 3 is a schematic structural diagram of the foldable bottom diversion and drag reduction device of the wagon provided by the invention when being folded.

Fig. 4 is a schematic view of the structure of the transmission.

Fig. 5 is a schematic view of the connection between the base plate and the ramp plate.

Description of reference numerals: 1. a truck; 2. a bottom flow guiding and resistance reducing device; 3. a base plate; 4. a ramp plate; 5. a side skirt; 6. a transmission device; 7. a motor; 8. a connecting rod; 9. a transmission base; 10. a threaded rod; 11. a transmission top seat; 12. and (4) connecting joints.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are provided for illustration only and are not to be construed as limiting the invention.

As shown in fig. 1, the invention discloses a foldable wagon bottom flow-guiding and drag-reducing device, which comprises a bottom flow-guiding and drag-reducing device 2, wherein the bottom flow-guiding and drag-reducing device 2 is in a hollow folding structure form, and the bottom flow-guiding and drag-reducing device 2 is fixed at the bottom of a wagon 1 and is used for reducing the air resistance at the bottom of the wagon.

Specifically, as shown in fig. 2 and 3, the bottom diversion drag reduction device 2 includes a bottom plate 3, a slope plate 4, a side skirt 5, a transmission device 6, and a motor 7; the bottom plate 3 is fixedly connected with the bottom of the truck 1, the side skirts 5 are positioned on two sides of the bottom plate 3, and the side skirts 5 are connected with the side surfaces of the bottom plate 3 through spring hinges; one end of the slope plate 4 is connected with the bottom plate 3 through a movable shaft, the other end of the slope plate 4 is connected with the bottom plate 3 through a transmission device 6, and the transmission device 6 drives the slope plate 4 to rotate around the movable shaft; the motor 7 is fixed on the transmission device 6 and used for driving the transmission device 6.

Specifically, as shown in fig. 4, the transmission device 6 includes a connecting rod 8, a transmission device base 9, a threaded rod 10, a transmission device top seat 11, and a connecting joint 12, wherein the transmission device base 9 is fixedly connected with the bottom plate 3, and the transmission device top seat 11 is fixedly connected with the slope plate 4; the connecting joint 12 is connected with the transmission top seat 11 through a shaft, the connecting joint 12 is connected with the transmission base 9 through a connecting rod 8 and a threaded rod 10, and the threaded rod 10 is located between the connecting rods 8 and used for driving the connecting rod 8 to achieve extension and compression of the transmission 6.

Specifically, the switch of the motor 7 is controlled by a button of the cab, and the rotation of the motor 7 drives the threaded rod 10 to rotate, so that one section of the connecting rod 8 is folded and extended, and the slope plate 4 is pushed to rotate around the movable shaft.

In particular, the spring hinge is used to fold the side skirt 5 up under the action of the spring force.

Specifically, the bottom diversion and resistance reduction device 2 has two states, namely a folded state and an unfolded state; the ground clearance in the folded state is equivalent to the original ground clearance, and the unfolded state is used for reducing the air resistance of the bottom of the truck.

The bottom diversion and resistance reduction device 2 is made of composite materials.

Specifically, the composite material includes glass fibers for withstanding frequent impacts and meeting the requirement of light weight.

Examples

A foldable truck bottom flow guide and resistance reduction device comprises a truck 1, a bottom flow guide and resistance reduction device 2, a bottom plate 3, a slope plate 4, a side skirt 5, a transmission device 6, a motor 7, a connecting rod 8, a transmission device base 9, a threaded rod 10, a transmission device top seat 11 and a connecting joint 12, wherein the bottom plate 3 is fixedly connected with the bottom of the truck 1.

The device is made of a composite material with light weight and good flexibility, so that frequent impact can be borne on one hand, and the composite material is light in weight and cannot excessively increase the weight of the whole vehicle on the other hand. By adopting the foldable design, the ground clearance of the vehicle can be increased when the vehicle runs on a deceleration strip and a thick snow road surface, and meanwhile, the occupied space is small.

The connection mode among each part is as follows: the bottom water conservancy diversion fairing 2 is fixed in the bottom of freight train 1, and its connected mode is bottom water conservancy diversion fairing's bottom plate 3 and the bottom fixed connection of freight train 1, and the side of side skirt 5 and bottom plate 3 passes through spring hinge connection, and the spring hinge can make side skirt 5 fold up under the effect of spring force simultaneously. The ramp plate 4 is connected to the base plate 3 by a movable shaft in the manner shown in fig. 5. The transmission device 6 is connected with the bottom plate 3 and the slope plate 4, the transmission device 6 is fixedly connected with the bottom plate 3, and the transmission device top seat 11 is connected with the connecting joint 12 through a shaft, so that the transmission device top seat 11 and the connecting joint 12 can move relatively. The motor 7 is fixed on the transmission device 6. The motor 7 rotates to drive the threaded rod 10 to move, so that the transmission device 6 is extended and compressed.

The working principle of the foldable wagon bottom flow guiding and resistance reducing device is as follows: when the vehicle runs at high speed, the air resistance at the bottom is large, and in order to reduce the air resistance at the bottom, the bottom diversion and resistance reduction device 2 is unfolded to realize diversion and resistance reduction. The switch of the motor 7 is controlled by a button of the cab, the motor 7 rotates to drive the threaded rod 10 to rotate, so that the connecting rod 8 is folded and extended for one section, the slope plate 4 is pushed to rotate around the movable shaft, and when the slope plate 4 reaches a certain gradient, the side skirt 5 is pushed to overcome the spring hinge to prop the side skirt 5 open, so that the device is unfolded. When the vehicle runs at a low speed, the device is in a folded state, the contraction process is as follows, the motor 7 drives the threaded rod 10 to rotate, the distance between one end connected with the threaded rod is increased, the other end of the threaded rod descends downwards, the top end of the transmission device 6 drives the slope plate 4 to move downwards, and when the slope plate 4 reaches a certain angle, the side skirt 5 starts to be folded inwards under the elastic action of the spring hinge, so that the folding process of the device is realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and scope of the present invention are intended to be covered thereby.

Claims

1. The utility model provides a collapsible freight train bottom water conservancy diversion fairing which characterized in that: the device comprises a bottom diversion and resistance reduction device (2), wherein the bottom diversion and resistance reduction device (2) is in a hollow folding structure form, and the bottom diversion and resistance reduction device (2) is fixed at the bottom of a truck (1) and used for reducing the air resistance at the bottom of the truck.

2. The collapsible cart bottom flow guiding and drag reducing device of claim 1, wherein: the bottom flow-guiding and resistance-reducing device (2) comprises a bottom plate (3), a slope plate (4), a side skirt (5), a transmission device (6) and a motor (7); the bottom plate (3) is fixedly connected with the bottom of the truck (1), the side skirts (5) are positioned on two sides of the bottom plate (3), and the side skirts (5) are connected with the side surfaces of the bottom plate (3) through spring hinges; one end of the slope plate (4) is connected with the bottom plate (3) through a movable shaft, the other end of the slope plate (4) is connected with the bottom plate (3) through a transmission device (6), and the transmission device (6) drives the slope plate (4) to rotate around the movable shaft; the motor (7) is fixed on the transmission device (6) and used for driving the transmission device (6).

3. The collapsible cart bottom fairwater of claim 2, wherein: the transmission device (6) comprises a connecting rod (8), a transmission device base (9), a threaded rod (10), a transmission device top seat (11) and a connecting joint (12), the transmission device base (9) is fixedly connected with the bottom plate (3), and the transmission device top seat (11) is fixedly connected with the slope plate (4); the connecting joint (12) is connected with the transmission top seat (11) through a shaft, the connecting joint (12) is connected with the transmission base (9) through a connecting rod (8) and a threaded rod (10), and the threaded rod (10) is located between the connecting rods (8) and used for driving the connecting rod (8) to extend and compress the transmission device (6).

4. The collapsible cart bottom fairwater of claim 3, wherein: the switch of the motor (7) is controlled by a button of the cab, and the rotation of the motor (7) drives the threaded rod (10) to rotate, so that one section of the connecting rod (8) is folded and extended, and the slope plate (4) is pushed to rotate around the movable shaft.

5. The collapsible cart bottom fairwater of claim 2, wherein: the spring hinge is used for enabling the side skirt (5) to be folded under the action of spring force.

6. A collapsible truck bed draft reducing device according to any one of claims 1 to 5 wherein: the bottom flow-guiding and resistance-reducing device (2) has two states, namely a folded state and an unfolded state; the ground clearance in the folded state is equivalent to the original ground clearance, and the unfolded state is used for reducing the air resistance of the bottom of the truck.

7. The collapsible cart bottom fairwater of claim 6, wherein: the bottom diversion and resistance reduction device (2) is made of composite materials.

8. The collapsible cart bottom fairwater of claim 7, wherein: the composite material includes glass fibers for withstanding frequent impacts and meeting the requirement of light weight.