JP2698355B2 - Small curve passing trolley - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bogie that can smoothly pass through a curved rail with a small radius of curvature. [Prior Art] In a normal bogie, since wheels are fixed to both ends of an axle, when running on a curved rail, slip and twisting of wheels occur due to different running distances of an outer wheel and an inner wheel. When the radius is very small, it is impossible to follow the rail with only a slight slip, and it becomes locked and cannot pass. Therefore, there has been proposed a steering link mechanism in which independent wheels of a caster type are mounted on a bogie frame, and levers fixed to turning pins of the inner and outer wheels are connected to each other by tie rods. [Problems to be Solved by the Invention] In such a bogie, since the inner and outer wheels are independent, no slip occurs at the time of passing a curve, and the steering link mechanism
Although all four wheels can run in the tangential direction of the rail, the load supporting point of the wheel, that is, the turning pin and the ground contact point of the wheel are displaced from each other, so that the load supporting ability is inferior, and the mechanism is extremely difficult. There is a problem that becomes complicated. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and to provide a bogie having excellent load-bearing ability, a simple structure, and capable of smoothly passing a small curve. [Means for Achieving the Object] In order to achieve the above object, in the present invention, a steering member is supported by an axle on which each wheel is rotatably mounted via an axle, and the steering member is connected to each steering member. Each time it is pivotally attached to the bogie frame around one point in the center,
The truck has a configuration in which the other end of the pair of cylinders, one end of which is pivotally connected to the bogie frame, is pivotally connected to the steering member to rotate the steering member. [Operation] When the curved rail is approached, the steering member is rotated by a cylinder around a point where the steering member is pivotally attached to the bogie frame, so that the axle is aligned with the direction of the center of the radius of curvature, thereby forming the curved rail. Since the vehicle can travel and each wheel can rotate independently, it does not slip even when traveling on a curved rail. Further, since the inner and outer rings are attached to one axle, there is no deviation between the load support point and the ground point of the axle. Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall schematic plan view of a small-curve passing trolley according to an embodiment. As shown in the figure, wheels 3 are rotatably mounted on both ends of an axle 1 via roller bearings 2. An intermediate portion of the axle 1 is supported by axle boxes 4, 4 having springs, and each axle box 4 is attached to a steering member 5. A gear 6 is fixed inside at least one axle 3 of the axles, and the gear 6 meshes with a driving gear 9 fixed to an output shaft 8 of a motor 7. The motor 7 is mounted on the axle 1. The steering member 5 is rotatably attached to a lower surface of a bogie frame 10 by a vertical shaft 11. In the figure, reference numeral 12 denotes a roller for supporting the load of the steering member 5. A horizontal frame 13 is fixed to an intermediate portion of the bogie frame 10, and rear ends of a pair of cylinders 14, 14 are pivotally mounted on the horizontal frame 13, and are rotatable in a horizontal direction. The tip of the fourteen piston shafts 15 is pivotally connected to the steering member 5. In the above description, one set of a so-called one-axis bogie has been described. However, as shown in FIG. 1, in this embodiment, two sets are actually provided before and after one bogie frame 10. 7 is provided on a diagonal line. Although not shown, a control device for controlling the amount of expansion and contraction of the piston shaft 15 of the cylinder 14 in accordance with the curvature of the curved rail is provided on the bogie. Immediately before the bogie enters and exits the curvilinear rail, a sign is provided to notify the bogie controller of the existence of the curvilinear rail and the curvature of the rail. It is preferable to provide a detector for detecting the sign. In order to run such a bogie, the motor 7 is started and the wheels 3 are driven. Then, when the bogie approaches the curved rail, a detector associated with the front wheel detects a sign provided near the rail, and the cylinder 14 is operated in accordance with the curvature to operate the steering member 5 of the front wheel to the rail. Tilt toward the center of the radius of curvature. Therefore, the wheel 3 is oriented in the tangential direction of the rail. On the other hand, since the rear wheel is still traveling along the straight rail, the cylinder 14 of the rear wheel is not operating. As soon as the detector associated with the rear wheel detects the said sign, the control device is actuated, operating the cylinder 14 in the same manner as described above to tilt the steering member 5 of the rear wheel towards the center of the radius of curvature of the rail. When the front wheels or both the front wheels and the rear wheels run on the curved rail in this way, the axle is directed to the center direction of the radius of curvature of the rail via the steering member 5, and the front and rear axles 1 and 1 are connected to each other. It runs smoothly along the curvature of the rail to rotate in the shape of a letter. When the bogie leaves the curved rail, first, a detector associated with the front wheel detects the sign, and the steering member 5 of the front wheel is returned to a straight state. Of the steering member 5 is restored. At this time, since the inner ring and the outer ring can rotate independently, they can be moved by an arbitrary distance guided by the rail by the flange of the wheel, so that no slip occurs, and therefore, the vehicle can run smoothly even on a small curved portion. . In the above embodiment, a two-axle bogie having two sets of one-axis bogies has been described, but the present invention can also be applied to a three-axle bogie. Further, not only a power truck having a driving device but also an accompanying truck may be used. [Effects] According to the present invention, independently rotatable axles are attached to the axle of the bogie as described above, and the steering member supported by the axle is pivotally attached to the bogie frame so as to be rotatable about one point. ,
The steering member is rotated by the cylinder so that the axle points in the tangential direction of the curved rail, so that it can pass smoothly even on a small curved rail without slipping, and there is a deviation between the ground contact point and the load support point of the axle. Since there is no load, the load resistance is excellent, and the structure is simple, so that there is an effect that the burden on cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially broken plan view showing an embodiment of the present invention, FIG.
The figure is a side view of the same, and FIG. 3 is a front view of the same. DESCRIPTION OF SYMBOLS 1 ... axle, 2 ... roller bearing, 3 ... wheels, 4 ... axle box, 5 ... steering member, 6 ... gear, 7 ... motor, 8 ... output shaft, 9 ... drive gear, 10 ... bogie frame, 11 ... vertical axis, 12 ...
Roller, 13 horizontal frame, 14 cylinder, 15 piston shaft.

Claims (1)

(57) [Claims] A steering member is supported by an axle in which each axle is rotatably mounted via a bearing, and the steering member is rotatably mounted on a bogie frame so as to be rotatable around a central point of each steering member. A small-curve passing truck wherein the other end of a pair of cylinders pivotally attached to a frame is pivotally connected to the steering member to rotate the steering member. 2. The intermediate part of the axle is supported by a steering member via a spring.
The truck passing through a small curve described in the section. 3. The rotation drive unit for transmitting a rotational force to a wheel on one side of each of the axles via a rotation transmission mechanism is attached to the axle, according to claim 1 or 2, wherein Small curve passing trolley. 4. The control device for controlling the cylinder, and a detector for detecting a sign provided along the curved rail and sending a signal of the signal to the control device is provided. (3) The small-curve passing trolley according to any of the above (3).