JPH01178075A - Railroad vehicle truck provided with guide wheel - Google Patents

Abstract

PURPOSE:To improve travel safety on a curved path having small curvature by supporting a wheel shaft provided with a drive wheel and a rotatable driven wheel at the opposite ends on a truck and arranging guide wheels rollable on the sideface of a travel rail while being in contact therewith on the right and left at front and rear of the truck. CONSTITUTION:A drive wheel 1 is secured to one end of a wheel shaft 3 while a driven wheel 2 is fixed through a bearing to the other end, and the wheel shaft 3 is supported through bearings in longitudinally central position of a truck frame 5. Supporting frames 7 extending downward are arranged at right and left positions in front and rear sections on the underface of the truck frame 5, and guide wheels 8 are arranged at the lower sections of respective supporting frames 7. The guide wheels 8 are arranged rollably on the right and left travel rails 13, 13 while being in contact with the inner sidefaces thereof. A drive gear 8 is provided on the wheel shaft 3 and driven through a motor 10. Two such trucks 5 are assembled through a large pan 12 into the front and rear sections of the body 11 so that the drive wheel 1 and the driven wheel 2 are arranged reversely each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a traveling bogie for a track vehicle such as a railway vehicle, which facilitates passing through short curves with a small radius.

Conventional technology: The wheels of a running bogie for a tracked vehicle are press-fitted onto the wheel axle and cannot rotate on the axle. Therefore, when traveling on a curved road, the wheels of a running bogie for a tracked vehicle are pressed into place and cannot be rotated on the axle. Slippage inevitably occurs between the wheel treads. Therefore, it is necessary to provide a diameter difference between the outer wheel and the inner small wheel to absorb the difference in stroke.

Conventional running bogies use flanged wheels that have conical treads and are guided by contacting the inner surface of the rail. By shifting to , the diameter difference between the outer wheel and the inner wheel is
This difference in diameter solved the problem.

Problems to be Solved by the Invention However, where the curvature of the curve is very small, specifically, the stroke difference due to the difference in diameter between the left and right wheels caused by the lateral deviation of the inner raceway tread, and the difference between internal rotation and outer raceway on the curve. When traveling in a place where the curvature is smaller than the curvature when the stroke difference is equal, the flanges come into sliding contact with the rails, causing squeaks, abnormal wear of the flanges, or abnormal wear of the rails. If the curvature is even smaller, the bogie will not be able to pass through the curve and will derail.

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional track vehicle bogie using wheels having an inner hollow tread surface, and to provide a track vehicle running bogie that can safely and smoothly pass through a curved road with a small curvature. It is in.

Means for Solving the Problems In this invention, a driving wheel shaft having a driving wheel with a cylindrical tread surface and a rotatable follower wheel provided on both wheel seats is supported on a bogie, and rotates by contacting the inner side surfaces of the left and right tracks. Two traveling carts are equipped with guide wheels at the front and rear of the cart, and the driving wheels and follower wheels are arranged in opposite directions, allowing for free horizontal rotation via center plates on the front and rear floor bottoms of the car body. .

Function This invention provides fitting @wheels with cylindrical treads and rotatable wheels on both side wheel seats, a driving wheel and a following wheel on a so-called one wheel shaft, and a pair of left and right wheels that rotate by contacting the inner side surfaces of the left and right tracks. Two traveling carts each having two sets of guide wheels installed at the front and rear of the cart are assembled on the bottom of the front and rear floors of the car body via a core plate, with the driving wheels and trailing wheels facing in opposite directions. Since the driven wheels rotate freely with respect to the driving wheels that rotate together with the wheel axle, the difference in stroke between the inner and outer tracks on a curve can be eliminated.

Furthermore, the centrifugal force acting on the truck is supported by the guide wheels that abut the inner side surfaces of the left and right rails, thereby preventing the truck from being pushed out to the outside of the curve. As a result, it is possible to safely pass a small curve with an extremely small radius of curvature of about 8nl, which conventional track vehicles using seven-lunged wheels could not pass.

However, the centrifugal force that acts when passing through a curve is evenly supported by the guide wheels installed at the front and rear of the running wheels, so the bogie can always be oriented in the tangential direction of the curve, and as a result it can smoothly pass through the curve. can.

Example Embodiments of this invention will be described based on the drawings.

A wheel set (3) having a driving wheel (1) in which wheels with cylindrical treads are fitted on both wheel seats, and a trailing wheel (2) in which the same wheels as above are rotatably attached via bearings (4). It is supported by a bearing at the central position in the longitudinal direction of the bogie frame (5). Further, guide wheels (8) are mounted on support frames (7) extending downward at the left and right positions of the front and rear parts of the lower surface of the bogie frame (5), respectively.

The guide wheels (8) are configured to rotate while abutting against the inner side surfaces of the left and right rails (13), and are designed to prevent the driving wheels (1) and follower wheels (2) from derailing the bogie (6). In addition to guiding the bogie, it also receives the centrifugal force that acts in the left and right directions of the bogie, allowing it to pass through curves.

Further, a drive gear device (9) is provided on the wheel axle (3), and is configured to be driven by a motor (10) suspended from the bogie frame (5).

The two bogies (6) configured as described above are turned so that the driving wheels (1) and trailing wheels (2) are in opposite positions, and large center plates ( 12).

When the motor (10) is energized, the driving wheels (1) are driven and rotated, but each driving wheel (1) of the front and rear bogies (6) is divided into a left rail and a right rail, and the front and rear driving wheels (1) rotate. Motion g
- This allows the vehicle to proceed in a straight line. Then,
Guide wheels (8) are installed on the left and right rails (1) at the front and rear of the truck (6).
The carriage (6) moves along the track as it rotates while coming into contact with the inner side surface of the carriage (6). Further, even if lateral acceleration is applied to the bogie while it is running and vibration occurs in the lateral direction, the guide wheels will guide the bogie correctly and the direction of movement will not change.

As shown in Figure 4, when approaching a curve, there is a difference in travel between the wheels on the inner track and the wheels on the outer track, but this difference is eliminated by the free rotation of the trailing wheels (2) on both the front and rear bogies. , and guided by the front and rear guide wheels (8), the truck can pass through curves while changing direction.

Moreover, if the front and rear guide wheels (8) are placed at the same distance from the wheels (IX2), the centrifugal force when passing through a curve is equally received by the front and rear guide wheels, and the bogie is always directed in the tangential direction of the curve. You can pass through it smoothly.

When accelerating or decelerating while running, the driving wheels are driven only on one side, so if the tangential force at the contact part moves only on one wheel, the force of the rolling resistance valve on the other wheel will cause the cart to move in the direction of the wheel. Although a moment is generated that acts to deviate from the direction, the guide wheels rotate in contact with the inner side surfaces of the rails at the front and rear of the wheels, so the bogie is guided in the running direction.

Effects of the Invention This invention has a wheel axle with a driving wheel with a cylindrical tread on one side and a rotatable follower wheel on the other side, and guide wheels that rotate by contacting the inner side surfaces of the rails are provided at the front and rear of the left and right wheels. Since the bogie is constructed using a combination of wheels, the difference in stroke between the inner track and the outer track on the curve is resolved, and the guide wheels guide the track in the direction of the track.
It is possible to travel safely and smoothly even on curves with extremely small curvature that wheels with 7-lunges could not pass. And 7 on the wheels
Since there are no lunges, there is no squeaking noise when passing through curves.
There is no abnormal wear on the rails.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the main parts of a track vehicle using a bogie according to the present invention, FIG. 2 is a plan view taken along the line A- in FIG. 1, and FIG. 3 is a right side view of FIG. FIG. 4 is an explanatory diagram showing the state of the truck when passing through a curve. 1...Driving wheel 2...Following wheel 3...Wheel axle 4...Bearing 5...Bolly
6...Bolly frame 7...Support frame 8...
Guide wheel 9... Drive tooth width device 10... Motor 1
1... Vehicle body 12... Core plate 13...
Rail applicant Sumitomo Metal Industries Co., Ltd. agent Patent attorney Yoshihisa Oshida 4": 1, , +'l:

Claims (1)

[Scope of Claims] 1. A drive wheel shaft having a driving wheel with a cylindrical tread and a rotatable follower wheel on both wheel seats is supported on a bogie, and a guide wheel that rotates by contacting the inner side surfaces of the left and right rails is attached to the bogie. The guide wheel is characterized in that two traveling bogies are installed at the front and rear, the driving wheels and the following wheels are arranged in opposite directions, and the guide wheels are assembled to the front and rear floor bottoms of the car body through center plates so as to be horizontally rotatable. A running bogie for track vehicles with 2. The traveling bogie has a wheel fitted on one wheel seat and a wheel shaft rotatably attached to the other wheel seat via a bearing, which is pivotally supported at the center of the bogie in the longitudinal direction. Two sets of left and right guide wheels, which are driven by a motor through a device and rotate by contacting the inner side surfaces of the left and right rails, are installed at equal distances from the front and rear wheel axles of the bogie. A running bogie for a track vehicle having a guide wheel according to claim 1.