JP2003137143A - Dual traction trailer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the tail end trailer of multiple connections from moving in a zigzag and improve travelling stability in a dual traction trailer having travelling performance not to deviate a travelling locus from the travelling path of a traction vehicle and to sufficiently secure travelling performance at the time of changing a traction direction. SOLUTION: A front side wheel 12 and a tie rod 19 of a rear side wheel 13, and a front part tow-bar 14 and a rear part tow-bar 15 are connected respectively. The front part tow-bar 14 and the rear part tow-bar 15 are linked by a cross rod 21 via some play. A slide pin 33 as a slide engagement means is provided for engaging the front side wheel 12 with the front part tow-bar 14 and also not engaging the rear side wheel 13 with the rear part tow-bar 15. A changing means 30 is provided for changing the slide pin 33 according to the change of a travelling direction. An anti-swing device 40 is provided between the rear part tow-bar 15 of at least the tail end vehicle and a main body 10 in the case of multiple connections.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a towed trailer capable of connecting a plurality of vehicle bodies to each other in the front and rear and towed from any of the front and rear, and particularly, the connected trailer is the same as the front row trailer. The present invention relates to a towed trailer in which the trailing trailer of the trailing trailer is prevented from meandering with respect to both towed trailers that follow the travel route that follows a trajectory, and the running stability of all vehicles is further improved.

[0002]

2. Description of the Related Art Conventionally, a front wheel and a rear wheel are equipped, and a front toe bar extending forward from a center position of a front part and a rear part of a vehicle body and a rear toe bar extending rearward are provided so as to be swingable in a horizontal direction. A towed trailer is known in which a plurality of vehicle bodies are connected to each other by the towbar in the front-rear direction and can be towed from both front and rear sides. The applicant of the present invention has already proposed that both of these towed trailers have been improved to improve drivability so that all connected trailers do not deviate from the running locus of the towed vehicle. (See Japanese Patent Registration No. 30021199). This conventional technique will be described below.

4 and 5 (FIG. 4 is a plan view,
FIG. 5 shows a side view. ), 10 is a vehicle body of a trailer, and the vehicle body 10 is equipped with a pair of left and right front wheels 12 and rear wheels 13 on the front and rear sides thereof. Car body 1
A front toe bar 14 and a rear toe bar 15 are supported at the center positions of the front part and the rear part of 0 by swinging in the horizontal direction via king pins 16 and 17, respectively. The front wheel 12 and the rear wheel 13 are supported by a knuckle 18 having a predetermined kingpin angle and steered by the knuckle. The knuckle arm 18a having the kingpin angle, the front toe bar 14 and the rear toe bar 15
Tie rods 19 and 19 are provided between them.

The front towbar 14 and the rear towbar 1
A stabilizer 20 is provided between the vehicle 5 and the vehicle body 10,
Bracket 14 protruding from rear tobers 14 and 15
Two diagonally installed bridges are provided between a and 15a and the vehicle body 10. The main function of this stabilizer 20 is to elastically adjust the straightness of the running vehicle so that the straightness of the vehicle is always maintained. It is not a thing but a thing which imparts a slight rectilinear rectilinearity secondarily.

Brackets 14b, 15b are provided at the left and right symmetrical positions of the stabilizer brackets 14a, 15a at the ends of the front towbar 14 and the rear towbar 15, respectively.
The brackets 14b and 15b are diagonally connected by a cross rod 21 that passes through the center point of the plane of the vehicle body 10. At a connecting portion between one end of the cross rod 21 and the arm 15b, a pin projecting upward from the bracket 15b is fitted and inserted into a long hole 21a formed at an end of the cross rod 21. A predetermined play is given to the movement of the cross rod 21 in the movement direction. This play is given along the movement direction of the cross rod 21,
The same effect can be obtained by configuring this play so that the length of the cross rod 21 changes in a predetermined range in the middle portion of the cross rod 21, for example. At the other end of the cross rod 21, a pin protruding upward from the cross rod 21 is directly attached to the bracket 1.
It is inserted in 4b and no play is given.

[0006] In such a towed trailer, when a large number of trailers are connected and a curve is made while traveling,
When the toe bar 14 on the front side in the traveling direction follows the tractor and swings and turns, the front wheel 12 is steered through the tie rod 19 by the knuckle steering, and the rear wheel 1
Reference numeral 3 traces a travel route that follows the same locus as the front wheels 12 by the operation of the cross rod 21. As a result, all the trailers follow the traveling route along the same trajectory as the trailer in the front row. Even when the vehicle turns straight from curving, the front wheel 12 returns straight and the rear wheel 13 is promptly restored by the cross rod 21 and follows. Reference numeral 18a denotes a knuckle arm to which the tie rod 19 is connected at the wheel 13.

[0007]

Both of the above-mentioned tow trailers are provided with a front / rear switching mechanism 30 (see FIG. 4) which operates when the tow direction is switched. In this mechanism, as shown in FIG. 6, when the trailer is pulled in the direction of the arrow, the slide pin 33 attached to the tip of the front intermediate rod 31 (see FIG. 4) is integrated with the tober 14. When the trailer is pulled in the direction opposite to the arrow direction by engaging the top of the triangular engaging hole 14d formed in the plate 14c attached to the front end without any play (solid line state in FIG. 6). The slide pin 33 is switched so as to be positioned in the wide portion of the triangular engagement hole 14d (indicated by the broken line in FIG. 6). FIG. 7 shows the engagement relationship between the tober 14 (15) and the slide pin 33 (34). According to this mechanism, when the trailer train is pulled backward by the forward / backward switching mechanism, that is, when the trailer towbar 15 is pulled forward, the clutch is switched from the forward drive state to the reverse drive state by the rotation of the wheels 13 and 12, and the switching rod 35 is actuated. Then, the intermediate rods 31 and 32 move to the positions opposite to those in the forward movement (see FIG. 4).

When a large number of such conventional towed trailers are connected and run, in one trailer, the slide pin 33 has a triangular engaging hole so that the toe wheel and the wheel follow the front wheel. Although it is in an engaged state (solid line state in FIG. 6) in which there is no play in 14d, the slide pin 3 for interlocking the movement of the tober and the wheel on the rear wheel
The engagement 3 (34) is in an engagement state in which there is some play in the wide portion of the engagement hole 14d (state of broken line in FIG. 6), and the rear towbar is of the trailer to be connected next. Movement is restricted by connecting to the towbar on the front side.

Then, in the trailer of the trailer of the trailers connected in large numbers, the tober extending to the rear side of the trailer has no partner to regulate it, and the slide pin 33 (34) has the engaging hole 14d. Since the play is caused by the play due to being located in the wide portion, and further, the play is produced by the play in the long hole 21a of the connecting portion of the cross rod 21, the left and right due to vibration during traveling. Shaking will occur.

Although this sway does not have a great influence during normal traveling, it may be greatly swayed to the left or right due to centrifugal force when traveling at high speed or during a curve or the like. Will be changed. When such a situation occurs, the trailer trailer of a large number of connected trailers meanders to the left and right, resulting in a problem that the drivability is deteriorated for all the connected vehicles.

The present invention has been proposed in order to deal with such a problem, and prevents the trailing trailer of a trailing trailer in a large number of connected tow trailers from meandering and provides a stable running performance. It is intended to provide.

[0012]

In order to achieve the above object, the present invention is directed to a vehicle body equipped with front wheels and rear wheels with respect to a traveling direction, at a central position of a front portion and a rear portion of the vehicle body. In the towed trailer which is provided with a partial towbar and a rear towbar extending rearward so as to be swingable in the horizontal direction, and a plurality of vehicle bodies are connected by the front part or the rear towbar, and which can be towed from either the front side or the rear side, The tie rods of the front wheels and the rear wheels are respectively connected to the front toebar and the rear toebar, and the front toebar and the rear toebar are connected to each other through a cross rod with some play, and the front wheel and the front part are connected to each other. A slide engaging means for engaging the toe bar and disengaging the rear wheel and the rear toe bar is provided, and the slide engaging means is cut along with the change of the traveling direction. Includes a obtaining switching mechanism and is characterized between at least the end of the rear Tauber and the vehicle body plurality concatenated trailer, in that a vibration preventing device for preventing the deflection of the rear Tauber by elasticity.

Further, the shake preventing device holds the member fixed to the rear toe bar and the member fixed to the vehicle body with an elastic body interposed therebetween to thereby prevent the rear toe bar from rattling under no load. It is characterized by eliminating.

According to this construction, the tie rods of the front wheels and the rear wheels are respectively connected to the front toebars and the rear toebars, and the front toebars and the rear toebars are connected to each other through the cross rods with some play. As a result, all the trailers connected to each other have the traveling property that does not deviate from the traveling locus from the traveling route of the front row trailers.
Further, a switching mechanism is provided, which is provided with a slide engagement means for engaging the front wheel and the front tover and disengaging the rear wheel and the rear tover, and switching the slide engagement means in accordance with a change in the traveling direction. By including the above, it is possible to ensure the same traveling performance even when the pulling direction is switched.

Further, by providing a vibration preventing device for preventing vibration of the rear towbar by elasticity between at least the rearmost rear towbar of the trailer connected to the vehicle body, the rear towbar in the rearmost trailer is in a free state. Even if it is, you can prevent the shake,
It is possible to prevent the trailing trailer from meandering. Furthermore, since this anti-vibration device elastically holds the space between the rear tober and the vehicle body, even if the pulling direction is switched and the rear rear tober becomes the front tober in the front row. It is possible to follow the turning traveling of the towing vehicle, and the traveling performance does not deteriorate.

Further referring to the shake prevention device, the shake prevention device has a basic function different from that of the stabilizer described above. The above-mentioned stabilizer imparts rectilinear rectilinearity to the front or rear tow bar when a load is applied to the front or rear tow bar and the left and right parts swing to the left or right. This eliminates rattling caused by play in the support structure of the rear tober when the rear tober is in an unloaded state. By eliminating this rattling, the swinging of the rear towbar under no load can be prevented and the trailing trailer can be prevented from meandering.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings (note that the same parts as those in the conventional art are designated by the same reference numerals and a duplicate description will be partially omitted). 1 and 2 are explanatory views showing an embodiment of the present invention, showing a peripheral structure of a rear towbar of a trailer trailer which is an essential part of the invention (FIG. 1 is a plan view, FIG. 2 is a side view). It is.) The basic structure of both towing trailers is similar to that shown in FIG. 4, and it extends forward at the center position of the front and rear parts of the vehicle body 10 equipped with the front wheels 12 and the rear wheels 13 in the traveling direction. A rear toe bar 14 and a rear toe bar 15 extending rearward are provided so as to be swingable in the horizontal direction, and a plurality of vehicle bodies are connected by the front or rear toe bar 14, 15.
It has a structure that can be pulled from either the front side or the back side. Then, the tie rods 19 of the front wheels 12 and the rear wheels 13 are respectively connected to the front toe bar 14 and the rear toe bar 15, and the front toe bar 14 and the rear toe bar 15 are connected to each other through the cross rod 21 with some play. Then, a slide pin 33 serving as a slide engaging means for engaging the front wheel 12 and the front toe bar 14 and disengaging the rear wheel 13 and the rear toe bar 15 is provided. A switching mechanism 30 that switches according to the change is provided (see FIG. 4 in part).

Both of these towed trailers consist of a rear towbar 15
Is connected to the front towbar 14 of the next trailer to form a multiple connected trailer, and the front towbar 14 of the front row trailer is connected.
Is connected to a towing vehicle such as a tractor for towing traveling, and when the towing direction is changed, the rear towbar 15 at the end is used as the front towbar 14 in the front row and the towing vehicle is connected to this. It can be towed in the opposite direction. Further, by providing the above-mentioned structure, the traveling loci of all the connected trailers can be prevented from deviating from the traveling route of the towing vehicle, and even if the towing direction is switched, the same traveling performance is obtained. Can be obtained.

In both of these towed trailers, a shake prevention device 40 is provided at least between the rear towbar 15 of the trailer, which is the rearmost trailer, and the vehicle body 10. The shake prevention device 40 will be described in detail with reference to FIG. 3 (FIG. 3A is a side view, and FIG. 3B is a xx sectional view).

In this shake prevention device 40, a quadrangular prism member 42 is inserted into a hollow portion of a hollow quadrangular tubular member 41 so that the diagonal lines are displaced by 45 degrees, and an elastic body 43 such as rubber is interposed in the gap to form a quadrangular prism. It has a basic structure in which the elastic body 43 elastically absorbs the twist between the tubular member 41 and the quadrangular prism member 42. The square tube member 41 is fixed to the vehicle body 10 side by a mounting member 44, and one end of a lever 45 is fixed to the upper portion of the square pole member 42. The other end of the lever 45 has a pin 45a.
And the pin 45a of the lever 45 is held in the receiving hole 46a of the receiving member 46 fixed to the rear tober 15 side.

According to the shake preventing device 40 having such a structure, an elastic resistance can be added to the horizontal rattling of the rear toe bar 15 at the rearmost end, so that it is switched to the rear side by the switching mechanism. The rear toe bar 15 supported with some play can be held on the vehicle body to prevent its swinging. Then, by preventing the rear end towbar 15 from swinging by the shake preventing device 40, it is possible to prevent the trailing trailer from meandering, and it is possible to further improve the running stability of all vehicles.

This shake prevention device 40 prevents left and right shake by eliminating rattling that occurs in the rear toebar in the last unloaded state, and shakes the tober when a load is applied. It does not prevent movement. Therefore, by switching the towing direction, it is possible to sufficiently follow the turn of the towing vehicle even when the rearmost rear tober equipped with a shake prevention device is the front tober in the front row. .

[0023]

Since the present invention is constructed as described above,
In both tractor trailers that have runnability that does not deviate from the running path of the towed vehicle and can ensure runnability even when switching the tow direction, prevent the meandering of the trailing trailer connected in large numbers, The running stability of all connected vehicles can be further improved.

[Brief description of drawings]

FIG. 1 is an explanatory view (plan view) showing a main part of a bi-directional trailer according to an embodiment of the present invention.

FIG. 2 is an explanatory view (side view) showing a main part of the bi-directional trailer according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a shake prevention device for a bi-trailer according to an embodiment of the present invention.

FIG. 4 is an explanatory view showing an overall structure of a conventional bi-trailer (plan view).

FIG. 5 is an explanatory view showing the entire structure of a conventional bi-directional trailer (side view).

FIG. 6 is an explanatory diagram illustrating a pulling direction switching mechanism.

FIG. 7 is an explanatory diagram showing an engagement relationship between a tow bar and a slide pin.

[Explanation of symbols]

10 car body 12 and 13 wheels 14 front tober 15 rear tober 16,17 Kingpin 18 knuckles 19 tie rod 20 Stabilizer 21 cross rod 30 switching mechanism 31,32 Intermediate rod 33,34 slide pin 35 Switching rod 40 Anti-shake device 41 Square tube member 42 Square pillar member 43 Elastic body 44 Mounting member 45 lever 45a pin 46 receiving member 46a receiving hole

Claims (2)

[Claims] 1. A front toe bar extending forward and a rear toe bar extending rearward can be horizontally swung at central positions of a front part and a rear part of a vehicle body equipped with front wheels and rear wheels with respect to a traveling direction. In the case of a tow trailer in which a plurality of vehicle bodies are connected by the front or rear tobers and can be towed from either the front side or the rear side, tie rods of the front and rear wheels and the front and rear tobers are provided. And the front toebar and the rear toebar are connected to each other through a slight amount of play by a cross rod, the front wheel and the front toebar are engaged, and the rear wheel and the rear toebar are not connected. A slide engagement means for engagement is provided, and a switching mechanism for switching the slide engagement means according to a change in traveling direction is provided. A two-way trailer, characterized in that at least a rear towbar and a vehicle body are provided with an anti-vibration device that prevents the rear towbar from vibrating due to elasticity. 2. The shake preventing device holds a member fixed to the rear toe bar and a member fixed to the vehicle body with an elastic body interposed therebetween to thereby prevent the rear toe bar from rattling under no load. The double tow trailer according to claim 1, wherein the trailer is eliminated.