JP3142601U - Trailer with auxiliary drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trailer with an auxiliary drive device capable of reliably transmitting a drive force by pressing an auxiliary drive wheel against a trailer tire without requiring a strong force.
SOLUTION: A vertical guide rail 23 is attached to a position between front and rear tires 12 adjacent to each other on the left and right sides of a frame 11 of a trailer 10, and an auxiliary drive wheel 21 is provided so as to be movable up and down along the guide rail 23. A cylinder 24 for moving up and down 21 along the guide rail 23 is attached. In an emergency, the auxiliary drive wheels 21 are pressed against the front and rear tires 12 to drive them. The front and rear tires 12 are forcibly rotated in the same direction by friction so that the trailer 10 can move forward or backward. At this time, since the auxiliary drive wheels 21 are sandwiched from the three directions of the front and rear tires 12 and the cylinder 24 so that there is no escape, the auxiliary drive wheels 21 are always strongly pressed against the tires 12 and hardly slip.
[Selection] Figure 4

Description

  The present invention relates to a trailer with an auxiliary drive device that allows a non-driven tire of a trailer to be forcibly rotated to move forward or backward when a tractor slips or when driving force is insufficient on a slope.

  While towing a trailer with a tractor, the tractor tire may slip on a rough road, making it impossible to move forward. In that case, a method is adopted in which a plate member having an uneven surface is sandwiched between a tire driven by a tractor and the road surface, and the driving force is transmitted to the road surface by the friction to escape. However, work was dangerous and time-consuming on the slopes and in places with heavy traffic. Also, if the tractor was unable to pull the tractor because of insufficient engine output on the hill, he could not move forward.

On the other hand, Patent Document 1 discloses a vehicle including a device for escaping from a rough road. In this technology, an auxiliary driving wheel having a diameter smaller than the outer diameter of the tire is pressed against one tire that is not driven by power in an emergency, and the tire is forced to rotate by friction between the tire and the auxiliary driving wheel to escape. However, in the above-described technology, the driving wheel is pressed against the tire at one location. Therefore, if the auxiliary driving wheel is not pressed with a strong force, the auxiliary driving wheel itself slips due to the repulsive force, and the driving force is not easily transmitted to the tire. was there.
Japanese Patent Laid-Open No. 10-181368

  The problem to be solved by the present invention is to solve these conventional problems, with an auxiliary drive device that can reliably transmit the driving force by pressing the auxiliary driving wheel against the non-driven tire of the trailer without requiring a strong force To provide a trailer.

The configuration of the present invention that solves this problem is as follows.
1) In a trailer provided with a plurality of pairs of left and right non-driving tires in the front and rear of a vehicle body, auxiliary driving wheels having a smaller diameter than the tires can be moved up and down at the upper position between the left and right front and rear tires. The left and right auxiliary drive wheels are linked in the left-right direction or left and right independently, and are provided with pressing means to press against the front and rear tires, so that the front and rear tires can be forcibly rotated in the same direction with the pressed auxiliary drive wheels. 2) Trailer with auxiliary drive device 2) Pushing means attaches a vertical guide rail to the position of the trailer frame between tires, and attaches the auxiliary drive wheel to the guide rail in a horizontally slidable manner The trailer with an auxiliary drive device according to 1), wherein a rod of a cylinder for raising and lowering the auxiliary drive wheel is fixed to a non-rotating portion of the auxiliary drive wheel. A.

  According to the present invention, the auxiliary drive wheels are separated from the front and rear non-drive tires during normal running. In the event of a slip on a rough road, the trailer moves forward or backward by forcing the front and rear tires to rotate in the same direction by friction by pushing the auxiliary drive wheels against the front and rear non-drive tires. You can escape from the bad road. At this time, the auxiliary driving wheel is sandwiched from the front and rear tires and the pressing means in a state where there is no escape, so the auxiliary driving wheel is always strongly pressed against the tire and is difficult to slip, and the driving force is applied to the tire. Will be able to communicate reliably. In addition, even when it becomes difficult to run due to insufficient output of the engine of the tractor, it is possible to run with assistance of the driving force of the engine by forcibly rotating the tire with the auxiliary driving wheel as described above. Driving on slopes is good.

  The auxiliary drive device of the present invention generally interlocks both the left and right wheels, but only one side may be operated independently according to the road surface condition. Examples of the drive source for the auxiliary drive wheels include an electric motor, a hydraulic motor, and a pneumatic motor. As the pressing means, there are an electric cylinder, a hydraulic cylinder, a pneumatic cylinder, etc., which can also be manually operated. Embodiments of the present invention will be specifically described below with reference to the drawings.

  The embodiment shown in FIGS. 1 to 4 is an example of a trailer with an auxiliary drive device in which the auxiliary drive device of the present invention is attached to a semi-trailer. FIG. 1 is a side view of a trailer truck according to the embodiment, FIG. 2 is an explanatory view of the auxiliary drive device according to the embodiment, FIG. 3 is a plan view of the trailer with the auxiliary drive device according to the embodiment, and FIG. It is description which shows a use condition.

  In the figure, 10 is a trailer, 11 is a frame, 12 is a tire, 20 is an auxiliary drive device, 21 is an auxiliary drive wheel, 22 is an in-wheel motor, 22a is a fixed shaft, 22b is a stator, 22c is a rotor, 23 is A guide rail, 24 is a cylinder, 24a is a rod, 25 is a controller, and 30 is a tractor.

  As shown in FIGS. 1 to 3, the auxiliary drive device 20 of the present embodiment attaches vertical guide rails 23 to the positions between the front and rear tires 12 on the left and right sides of the frame 11 of the trailer 10, and the outer peripheral portion is made of rubber. Thus, the auxiliary drive wheel 21 integral with the in-wheel motor 22 is provided so as to be movable up and down along the guide rail 23, and a hydraulic cylinder 24 for moving the auxiliary drive wheel 21 up and down along the guide rail 23 is positioned above the auxiliary drive wheel 21. It is attached to. A controller 25 that controls the in-wheel motor 22 and the cylinder 24 so that the left and right are interlocked is attached to the cab of the tractor 30.

  The in-wheel motor 22 includes a stator 22b made of a winding on the outer periphery of a metal fixed shaft 22a, and a rotor 22c made of a permanent magnet electromagnetically opposed to the stator 22b on the inner surface of the auxiliary drive wheel 21. When a voltage is applied to the fixed shaft 22a, a current flows through the stator 22b, and rotational torque is generated in the rotor 22c so that the auxiliary drive wheel 21 rotates. The base of the fixed shaft 22a is slidably attached to the guide rail 23, the tip of the rod 24a of the cylinder 24 is fixed to the top of the fixed shaft 22a, and the auxiliary drive wheel 21 is moved up and down in a horizontal direction by the expansion and contraction of the rod 24a. I can do it.

  In this embodiment, during normal running, the rod 24a of the cylinder 24 is retracted as shown in FIG. 4A to keep the auxiliary drive wheels 21 away from the front and rear tires 12. In an emergency such as when the tire of the tractor 30 slips on a bad road, the controller 25 is operated to extend the rod 24a of the cylinder 24 as shown in FIG. The tires 12 are pressed against each other, and the auxiliary drive wheels 21 are driven by the in-wheel motor 22. The front and rear tires 12 are forcibly rotated in the same direction by the friction, and the trailer 10 moves forward to push the tractor 30 forward.

  When the vehicle escapes from the rough road, the controller 25 is operated to stop the auxiliary drive wheel 21, the rod 24a of the cylinder 24 is retracted and raised from the tire 12, and the running is resumed. Further, even when it becomes difficult to tow the trailer 10 due to insufficient output of the engine of the tractor 30, the tire 12 of the trailer 10 is forcibly rotated by the auxiliary drive wheels 21 in the same manner as described above to assist the towing of the tractor 30. Can run.

  Since the auxiliary driving wheel 21 is sandwiched between the front and rear tires 12 and the rod 24a of the cylinder 24 from three directions and has no escape space, the auxiliary driving wheel 21 is always strongly pressed against the tire 12 and hardly slips. The driving force can be reliably transmitted to the tire 12.

  The technology of the present invention can be applied not only to a trailer but also to an automobile equipped with a plurality of tires that are not driven by power, such as a large crane vehicle and a special vehicle, in the vicinity of the vehicle.

It is a side view of the trailer truck of an Example. It is explanatory drawing of the auxiliary drive device of an Example. It is a top view of the trailer with an auxiliary drive device of an example. It is description which shows the use condition of the auxiliary drive device of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Trailer 11 Frame 12 Tire 20 Auxiliary drive device 21 Auxiliary drive wheel 22 In-wheel motor 22a Fixed shaft 22b Stator 22c Rotor 23 Guide rail 24 Cylinder 24a Rod 25 Controller 30 Tractor

Claims (2)

  In a trailer provided with a plurality of pairs of left and right non-driving tires in front of and behind the vehicle body, auxiliary driving wheels having a smaller diameter than the tires are provided so as to be able to move up and down above the left and right adjacent front and rear tires. The left and right auxiliary drive wheels are linked to the left or right, or left and right, and are provided with pressing means to press against the front and rear tires, so that the front and rear tires can be forcibly rotated in the same direction with the pressed auxiliary drive wheels. A trailer with an auxiliary drive.   The pressing means attaches a vertical guide rail to the position between the tires on the trailer frame, and slidably attaches the auxiliary drive wheel to the guide rail in a horizontal state, and assists the cylinder rod that raises and lowers the auxiliary drive wheel. The trailer with an auxiliary drive device according to claim 1, which is fixed to a non-rotating portion of the drive wheel.

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