JPS62146786A - Running stabilizer for trailer - Google Patents

Abstract

PURPOSE:To prevent a trailer from generating a sway phenomenon, by mounting a movable type corner part to at least either one of a right or left corner of a trailer and detecting a large vehicle, when it tries passing, by a change of pressure so as to displace the movable type corner part to the inside. CONSTITUTION:A trailer 10 is equipped in its car body both side parts 10A, 10B with pressure sensors 12A-12D detecting a passing vehicle approaching, and movable type corner parts 14, 15 are provided in rear part corners 11A, 11B of the car body both side parts 10A, 10B. Said movable type corner parts 14, 15 are constituted being equipped with movable side plates 16, 17 which are offset inside a car body from a normal position, almost equally leveled to the car body side part 10A, and displaced to a sway preventing position being swivelable about hinges 18 corresponding to the passing vehicle approaching detected by the pressure sensors 12A-12D. And when the passing vehicle approaches, a sway phenomenon is prevented by said side plates 16, 17 smoothing a flow of air along the car body side parts of the trailer 10.

Description

[Detailed description of the invention]

(Industrial Field of Application) The present invention relates to a trailer running stabilizing device, and particularly, when a relatively small vehicle such as a passenger car tows a trailer such as a driving car, This article relates to an improvement in a trailer running stabilizing device suitable for maintaining good stability. [Prior art 1] When a relatively small vehicle such as a passenger car is towing a trailer, a large truck When a trailer is overtaken or overtaken (hereinafter referred to as passing) by a large bus or the like, a pressure difference is created between both sides of the trailer, causing the trailer to wobble, a so-called sway phenomenon, and driving stability decreases by 10%. In particular, the sway phenomenon appears conspicuously when traveling at high speeds.In order to suppress this sway phenomenon, the applicant proposed in Utility Model Application No. 59-142469 that pressure sensors υ are installed on both sides of the trailer body. and fins are attached to both sides of the trailer, the rear side of the car body being able to protrude outward in the vehicle width direction of the trailer in response to the pressure difference between both sides of the car body detected by the pressure sensor. In November 1985, the present applicant proposed a running stabilizing device for a trailer that separates the air flow at the front end of the vehicle, in order to similarly suppress the sway phenomenon. 29
The proposal was submitted as a utility model (name of the invention: ``trailer running stabilization device'') on the date of 43. In addition, in order to similarly suppress the sway phenomenon, the present applicant proposed in Utility Model Application No. 59-131456 that when a trailer tries to turn due to air pressure from the side by a passing vehicle, this turning is offset. We are proposing a trailer travel stabilization system that steers the wheels in the direction of the vehicle. [Problems to be Solved by the Invention] However, in the above-mentioned Utility Model Application Publication No. 59-142469, etc., fins, etc. are attached to the side of the vehicle body of the trailer, so there is a problem that these fins, etc. create air resistance during normal driving. has. Moreover, in the above-mentioned Utility Model Application Publication No. 59-131456, there is a problem that the device (1η configuration becomes multi-phase) in order to steer the wheels of a trailer. It was developed with a view to reducing the fluctuation of the trailer's yawing moment caused by passing vehicles, etc., to ensure stable running at all times, and also reduces air resistance during normal driving, making it easier to maintain eye-catching movement. It is an object of the present invention to provide a 1-rap running stabilizing device that can be simply configured.

[Means for Solving the Problems] The present invention provides a pressure sensor that is installed on both sides of the vehicle body of a trailer to detect the approach of a vehicle, and a pressure sensor that is located at the rear corner of at least one of the left and right sides of the vehicle body, and that is located inside the vehicle body. a movable corner part that can be freely offset, and the movable corner part moves the vehicle body from a normal position located substantially flush with the side part of the vehicle body in response to the approach of the vehicle detected by the pressure sensor. The above object is achieved by being displaced to an inwardly offset sway prevention position. Further, in an embodiment of the present invention, the movable corner portion is connected to the rear end of the side portion of the vehicle body of the trailer via a hinge, and the rear end portion in the longitudinal direction of the vehicle is freely movable toward the inside of the vehicle. Possible! It is made up of 14 Flj side plates. (Function 1 In the present invention, a movable corner part that is operated according to the pressure detected by a pressure sensor provided on both sides of the vehicle body of the trailer is attached to the rear corner of at least one of the left and right desks of the trailer, and When passing a vehicle such as a large bus, the movable part is moved to a position offset to the inside of the vehicle body, thereby directing the air flow along the rear part of the vehicle body side on the passing vehicle side of the trailer. The air flow can be changed from a flow that touches the rear of the side of the trailer's body to a flow that flows in a circle along the rear of the side of the trailer's body.This reduces the yawing moment generated by the air flow. This makes it possible to suppress the sway phenomenon and improve driving stability. [Example 1] Examples of the present invention will be described below with reference to the drawings. As shown in FIG. 7, pressure sensors 12A to 12D are arranged on both sides 10Δ, 10B of the vehicle body of the trailer 10 to detect the approach of a passing vehicle, and pressure sensors 12A to 12D are arranged on both sides 10Δ, 10B of the vehicle body, and a rear corner 11A of both sides 10Δ, 10B of the vehicle body.
, 11B, and is provided with a movable corner portion 14.15 that can be freely turned off on the inside of the vehicle body, and the movable corner portion 14.15 is configured to respond to the approach of a passing vehicle detected by the pressure sensors 12A to 12D. Accordingly, an opening is opened to the inside of the vehicle body from the normal position located substantially flush with the vehicle side portion 10A.
It is configured to be displaced to a offset anti-sway position. In addition, the code 38 in the figure is the trailer 1.
A truck consisting of a passenger car that tows 0. The movable corner portions 14 and 15 are connected to the vehicle body side portions 10Δ of the trailer 10 and the rear portion of the IOB via a hinge 18, and the rear ends 16B and 17B in the longitudinal direction of the vehicle are movable so as to be movable inwardly of the vehicle. It is constituted by side plates 16,17. The movable corner portions 14 and 15 provided on both sides 10A and 10B of the vehicle body are formed symmetrically and identically, and the movable side plate 16 on the right side will be explained below, and the movable side plate 17 on the left side will be explained below. , the structure is similar to that of the right movable side plate 16, so a description thereof will be omitted. As shown in FIG. 2 and FIG.
It is connected via a hinge 18 to the rear end of a vehicle body moving side plate 20 which is held movably in the longitudinal direction of the vehicle by the 0E. Further, the rear end 16B of the movable side plate 16 is connected via a hinge 22 to the outer end of a vehicle body movement rear plate 24 which is held movably in the vehicle width direction by the vehicle body rear portion 10C of the trailer 10. In the rear part 10E of the right side portion 10A of the vehicle body, there is a storage groove 2 for holding the vehicle body moving side plate 20 movably in the longitudinal direction of the vehicle.
6 is formed, and the vehicle body moving side plate 2 of this storage groove 26
A large number of rollers 1lql+ 30 are arranged in the vertical direction facing the inner and outer surfaces of the vehicle body moving side plate 20 to facilitate movement of the vehicle body moving side plate 20. Further, similar to the rear part 10E of the right side part 10A of the vehicle body, a storage groove 32 is formed at the outer end of the rear part 10C of the vehicle body to hold the vehicle body movement rear plate 24 movably in the vehicle width direction. On the surface of the storage groove 32 that faces the inner and outer surfaces of the vehicle body movement back plate 24, a large number of rollers 33 are oriented in the vertical direction. At the lower end of the vehicle body movement rear plate 24, this vehicle body movement rear plate 2
A drive device 34 for moving the vehicle 4 in the vehicle width direction is provided. This drive device 34 is composed of a rack (not shown) provided at the lower end of the rear plate 24 for moving the vehicle body, and a motor (both not shown) equipped with a pinion that meshes with the rack. As shown in FIG. 2, this drive device 34 allows the movable side plate 16 (
It will be displaced to its normal position. Further, as shown in FIG. 3, when the vehicle body movement rear plate 24 is moved inward in the vehicle wheel direction, the movable side plate 16 is swung to the sway prevention position. The pressure sensors 12A to 120 are placed on both sides 10Δ of the vehicle body of the trailer 10, and on the respective front and rear ends of the IOB, that is, the right rear corner 11A, the left rear corner 11B, the right front corner 11C, and the left front corner 11D. There is. Detection pressure P1~ from these pressure sensors 12A~12D
P4 is input to computer 36. The computer 36 detects the approach of a passing vehicle based on the detected pressures P1 to P4, and when the approach of the passing vehicle is detected, operates the drive device 34 to move the movable corner portion 14. The side plate 16 is swung to the sway prevention position. Next, the operation of this embodiment will be explained with reference to FIGS. 4 and 5. FIG. 4(A) shows the air flow (indicated by an arrow J'' in the figure) when the front end 40A of the large-sized vehicle 1 to rack 40 as a passing vehicle is located on the side of the rear end 10C of the trailer 1o. The figure shows the yawing moment fvly around the center of gravity G-C generated by this air flow. In FIG. Part 1. OA
As a result, a clockwise yawing moment My is generated in the tray 10, causing the tray 10 to rotate 1 inch away from the large truck 40. At this time, as shown in FIG. 3, the movable side plate 16 is swung to the sway prevention position, which is offset to the inside of the vehicle body, so that the large truck 40 is moved as shown in FIG. The air flow branched by the front end portion 4OA flows smoothly along the surface of the movable side plate 16 offset to the inside of the vehicle body, thereby causing the right side plate 1 of the trailer 10 to flow smoothly.
It is possible to reduce the yawing moment MY in the direction of the steering wheel 110, which is generated due to the air flow hitting the rear part of the vehicle. As a result, the sway phenomenon of the trailer 10 is suppressed. FIG. 5 shows changes in the yawing moment coefficient CY of the trailer 10 when it is passed by a large truck 40, when the movable corner section 14 is activated (the state shown in FIG. 2) and when it is not activated (the state shown in FIG. 2). 3 shows the changes in the yawing moment coefficient CY for each of the states shown in FIG. 3). In FIG. 5, the horizontal axis is the rear end portion 10G of the trailer 10.
The distance x from the front end 40A of the large truck 40 is taken, and this distance l2i11X indicates the positional relationship of the large truck 40 with respect to the trailer 10. Also, m@ is the yawing moment RC of the trailer 10.
I am taking y. In addition, the actual FilA is a movable coordinating part 14.
The broken line B shows the change in the yawing moment coefficient CY when the movable corner portion 14 is not operated. As is clear from FIG. 5, the movable corner portion 14
When the movable corner portion 14 is activated, the yawing moment is
It can be seen that the yawing moment in the clockwise direction has been reduced by approximately half. Therefore, it is possible to suppress the sway phenomenon when the large truck 40 starts passing,
The running stability of the vehicle can be improved. FIG. 6 shows a flowchart of the control within the computer 20 for operating the drive device 22 of the movable fins 16,17. In the figure, Pa indicates the pressure inside the trailer 10. In this embodiment, the means for detecting passing by the large truck 40 is to detect the pressure distribution state due to the air flow of the trailer 10 in the positional relationship between the trailer 10 and the large truck 4o as shown in FIG. We are trying to detect and judge. That is, the program starts at step 100,
In step 102, whether or not the detected pressure P1 at the rear portion of the vehicle body on the passing vehicle passing side is greater than the ml internal pressure Pa, and the detected pressure P2 at the rear portion of the vehicle body on the non-passing vehicle passing side is smaller than the cabin pressure Pa. is determined. When this condition is satisfied, the process proceeds to step 104, and in step 104, it is determined that the detected pressure P1 is greater than the pressure inside the conductor Po, and the detected pressure P3 at the front part of the passing vehicle passing side of the car body is higher than the pressure inside the conductor. It is determined whether the pressure is smaller than the pressure Po. If this condition is met, step 1
The process advances to step 06, and in this step 106, it is determined whether the detected pressure P1 is larger than a limit value P' at which it is determined that the tractor 12 becomes unstable. The detected pressure P
1 is larger than the limit 1 direct P', the process proceeds to step 108, in which a signal for driving the motor of the drive device 34 is output,
The movable side plate 16 is swung to switch from the storage position to the sway prevention position. If even one of the conditions is not satisfied, the process returns to step 102 and the condition determination is repeated again. In addition, the movable side plate 1 has been switched to the sway prevention position.
6 is switched to return to the storage position after a predetermined period of time has elapsed or when the impact caused by overtaking the large truck 40 has diminished. According to the embodiment, when the large truck 40 passes by, the movable corner portion 14 is swung to the sway prevention position, thereby smoothing the air flow along the rear of the right side 10A of the trailer 10. to prevent this air flow from directly hitting the rear of the right side 10A of the vehicle body,
The clockwise yawing moment MY generated by this air flow can be reduced. Thereby, the sway phenomenon can be suppressed. Furthermore, when there is no passing vehicle approaching, the movable side plate 16 of the movable corner portion 14 is moved to the normal position, which is the same as the side plate of a normal trailer, thereby preventing the conventional sway prevention device using rotating fins. Compared to the trailer, the rotating fins and the like do not protrude from the side of the vehicle body of the trailer, so air resistance during normal driving can be reduced. Furthermore, since no rotating fins or the like are attached to the side of the vehicle body of the trailer 10, the appearance of the trailer can be improved. In addition, in the above embodiment, the movable corner portion 14 is
Although the movable corner portions are provided at the rear portions of the vehicle body side portions 10A and 10B of the trailer 10, that is, at both rear corners 11Δ and IIB, the present invention is not limited thereto. It may be provided only on the vehicle body side where the frequency is high. Furthermore, in the above embodiment J3, the movable corner portion 14 is
Consisting of a movable side plate 16, a vehicle body movement side plate 20 connected to the front end 16A of the movable side plate 16 via a hinge 18, and a vehicle body movement rear plate 24 connected to the rear end 16B of the movable side plate 16 via a hinge 22. However, the present invention is not limited to this, and in short, any structure may be used as long as the rear corner of the trailer body is recessed toward the inside of the vehicle. Furthermore, in the above embodiment, the drive device moves the vehicle body movement rear plate 24 in the vehicle width direction! 134 is constituted by a rack and a motor equipped with a pinion that meshes with the rack, but the present invention is not limited to this. For example, the drive ffJJ Ht is constituted by a hydraulic cylinder. It can also be used as a thing. Further, in the above embodiment, when the positional relationship between the large truck 40 and the trailer 10 is as shown in FIG.
Although the approach of the large truck 40 is detected by detecting the pressures P1 to P4 on both sides of the vehicle body of the trailer 10, the present invention is not limited to this, and the approach of the large truck 40 is detected from other positional relationships. It may also be used to detect. For example, when the trailer passes a large truck or the like, the movable corner portion may be operated in order to reduce the influence of the large rack. [Effects of the Invention] As explained above, according to the present invention, the excellent effect of suppressing the trailer sway phenomenon caused by large 1-racks, etc., and maintaining stable running at all times can be obtained. .

[Brief explanation of drawings]

FIG. 1 is a plan view including a partial block diagram showing the configuration of an embodiment of a trailer running stabilizing device according to the present invention, and FIG. 2 is a plan view showing a normal state of a movable corner part in the same embodiment. FIG. 3 is a partial cutaway plan view showing the sway prevention state of the movable corner portion in the same embodiment;
Figures (A) and (B) are diagrams comparing the air flow when passing by a large truck when the movable corner section is activated and when it is not operated. Figure 5 is a graph showing when passing by a large truck. Fig. 6 is a flowchart showing the operation routine of the drive device used in the above embodiment; FIG. 7 is a diagram showing the positional relationship between the trailer and the large truck and the pressure distribution when the movable corner section is operated. 10... Trailer, 12A-12D... Pressure sensor, 14.15... Movable corner part, 16.17... Movable side plate, 18.22... Hinge, 20... Vehicle body movement Side plate, 24... Vehicle body movement rear plate, 34... Drive device, 36... Computer, 40... Large size 1 to easy. Agent Kei Matsuyama Cantaka Ya Theory No. 1 Go No. 221 et al. 3 fig. 4 Decoy (A) (B) 955 fig. 6 Bu 1

Claims (2)

[Claims] (1) Pressure sensors arranged on both sides of the vehicle body of the trailer to detect the approach of a vehicle; and a movable corner section arranged at at least one rear corner of the left or right side of the vehicle body and capable of being freely offset to the inside of the vehicle body. , the movable corner portion is displaced from a normal position located substantially flush with the side portion of the vehicle body to a sway prevention position offset toward the inside of the vehicle body in response to the approach of the vehicle detected by the pressure sensor. A trailer running stabilizing device characterized by: (2) A patent claim in which the movable corner portion is constituted by a movable side plate that is connected to the rear end of the side portion of the vehicle body of the trailer via a hinge, and whose rear end in the longitudinal direction of the vehicle is movable inwardly of the vehicle. A travel stabilizing device for a trailer according to item 1.