JPH0556721U - Railcar bogie - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention aims to prevent the wheel and rail from being worn, reduce noise, and reduce the noise in the track curve by automatically orienting each wheel axle in front of and behind the railway vehicle toward the center of curvature of the track. (EN) Provided is a bogie for a railroad vehicle, which can improve traveling stability and speed in a curved portion and can improve stability against snake action. [Structure] Cylinders B and A are respectively provided between the bogie frame and the vehicle body of the bogie for railway vehicles and between the bogie frame and each wheel axle, and the chambers on the front end side and the base end side of these cylinders B and A are connected by piping. Cross-sectional areas S _B , S _A of corresponding portions of cylinders B, _A
Is defined as shown in the following equation. S _B / S _A = 2l ₂ · WB (l ₁ · BB) where l ₁ and l ₂ are the distances from the longitudinal center line of the bogie frame to the cylinders B and A, and WB is the distance between the wheel axles of the bogie frame. , B
B is the distance between the centers of the pair of bogie frames.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a bogie for railway vehicles.

[0002]

[Prior Art]

 In conventional bogies for railway vehicles, each wheel axle that holds a pair of wheels is held at both ends by a shaft box that houses bearings, and the bogie frame is located at the lower end of each longitudinal end of each wheel axle. It is elastically supported so that it can move up and down, left and right, and front and back by elastic expansion and contraction members such as coil springs and air springs that are mounted between the box and the box. In addition, a pair of front and rear wheel axles that are independent of each other are attached to the bogie frame so that they are always parallel to each other, and are rotated by separate motors.

[0003]

[Problems to be solved by the device]

 However, the above bogies for railway vehicles have the following difficulties. That is, as shown in FIG. 9, when a pair of parallel wheel axles and a bogie frame which are parallel to each other are merely connected by an elastic expansion / contraction member as in the conventional case, the railway vehicle a passes through the curved portion of the rail b. At this time, since the pair of wheel shafts d, d attached to each bogie frame F remain independent and parallel to each other, they cannot rotate in the direction passing through the curvature center O of the rail b.

For this reason, the rotation directions of the wheels e, e fixed to the pair of wheel shafts d, d do not coincide with the tangential direction of the rail b on which the wheel e is rolling, and slip occurs. Both the rail b and the wheels e are worn out, noise is generated, the railcar a is given excessive vibration, which makes the ride uncomfortable, and the parallel rail b is affected as the traveling speed is increased. There was a concern that the force would be increased to increase the distance between the rails, which would easily cause a derailment accident of the railway vehicle a.

The present invention has been made in view of the above-mentioned conventional problems, and aims at wear of wheels and rails, reduction of noise, and stability and speed improvement of running on a curved road. The purpose of the present invention is to provide a bogie for railway vehicles that does not impair the stability of the railway car.

[0006]

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the inventor has found that a pair of wheel shafts are arranged in front of and behind the bogie frame, and that the bearing housings for holding these wheel shafts are vertically, horizontally and front-rearward with respect to the bogie frame. In a movably supported bogie for rail cars, both ends are rotatably supported between the bogie frame and the vehicle body, and between the bogie frame and each axle box of the axle, and an oil tank for oil leak compensation is provided. A connected cylinder B and a cylinder A are provided, and both sides of the piston of the cylinder B are connected to both sides of the piston of the cylinder A by pipes, respectively, and a sectional area S _B of the cylinder _B and a corresponding sectional area S _{A of} the cylinder A are provided. the ratio of the distance a distance from the longitudinal direction centerline of the truck frame to the center of the cylinder a l _2, the distance between the pair of bogie frame center BB, from the longitudinal center line of the bogie frame to the center of the cylinder B L ₁ and the distance between the axles of the bogie frame is W Assuming that _B , S _B / S _A = (2l ₂ · WB) / (l ₁ · BB) is defined as satisfying the relationship, and a bogie for a railway vehicle was devised.

[0007]

[Action]

When a railroad car approaches a curved track section, the bogie frame at the front of the car rotates in the same direction as the curved section of the track with respect to the vehicle, and the car moves in the same direction as the curved section of the track with respect to the bogie frame at the rear of the vehicle. Rotate. By these rotations, the cylinder B on the side of the center of curvature of the track is moved in the extending direction, and the pair of cylinders A, A connected to the cylinder B are moved in the contracting directions. At the same time, since the cylinder B and the pair of cylinders A, A on the side opposite to the center of curvature of the track are moved in the opposite direction to those on the side of center of curvature, the pair of axles of each bogie frame is located on the side of center of curvature. The gap becomes narrower and the gap becomes wider on the opposite side, resulting in a V-shape (see FIG. 6). In this case, the cross-sectional areas S _A and S _B of the corresponding portions of cylinder A and cylinder B are such that when the center lines in the width direction of the bogie frame are deviated in the directions passing through the centers of curvature, Each wheel axle of the railroad car passing through the curved section of the track passes through the center of curvature of the track due to the wheels that automatically align with the track of the railway section, because they are determined to deviate in the direction of passing through the center of curvature. Directed in the direction.

[0008]

【Example】

 An embodiment according to the present invention will be described below with reference to the drawings. 1 to 8 show an embodiment of the present invention. FIG. 1 is a plan view of a railcar bogie 1 of this embodiment. In FIG. 1, the bogie frame 2 is formed in a horizontal H shape by a pair of bogie frame side beams 3 and 3 and transverse beams 4 and 4 connecting the central portions thereof at right angles. A pair of wheel shafts 5 and 5 arranged in the front-rear direction on the lower side of the bogie frame 2 has bearings housed in shaft boxes 7 and 7 on the outside of wheels 6 and 6 which are fixed according to the space between the tracks. It is rotatably held by (not shown).

FIG. 2 is a front view of the railcar bogie 1 of this embodiment. As shown in FIG. 2, the bogie frame 2 can be moved vertically, horizontally, by elastic expansion / contraction members 8, 8 such as coil springs, air springs, or rubber springs mounted between the holding members 7a of the respective axle boxes 7. And is elastically supported so that it can move in the front-back direction. Further, a pair of independent wheel shafts 5 and 5 arranged in the front-rear direction are connected to the gear units 10 and 10 via the joints 11 and 11 by separate motors 9 and 9 and rotated. It

Further, between the left and right outer sides of the bogie frame 2 and the wheel shafts 5, 5, there are provided cylinders A15, 15 whose both ends are rotatably supported. Cylinders B16, 16 are provided between the body 12 and the body 12, both ends of which are rotatably supported. The cylinders A15 and 15 and the cylinders B16 and 16 are connected by a pipe 19, and these are filled with fluid. The base ends of the cylinder A15 and the cylinder B16 are connected to oil leakage compensating tanks by pipes to compensate for oil leakage from the piston A17 and piston B18. The bogie frame 2 is fixed to the vehicle body 12 at the portion of the pillow beam 14 via an elastic expansion / contraction member 13 such as an air spring.

FIG. 3 is a simplified front view showing the relationship between the vehicle body 12 and the railcar bogie 1. Two bogies 1 and 1 for railway vehicles are provided in the front-rear direction of the vehicle body 12. FIG. 4 is a simplified plan view showing the relative relationship between the vehicle body 12 in the track curve portion and the pair of bogies 1 and 1 for railway vehicles provided in the front-rear direction thereof. The deviation angle θ ₁ when the center line in the width direction of a pair of railcar bogies 1 and 1 passes through the center of curvature O of the track in the curve section of the radius of curvature R is the distance between the pair of bogie centers. When BB is the distance between the axles of the bogie frame 2 and WB, it is expressed by the following equation. ^{_{θ 1 = Sin -1 (BB /}} 2R) Usually, since it is ^{_{BB«2R, θ 1 = Sin -1 (}} BB / 2R) ≒ BB / 2R ...... Figure 5 bogie for a railway vehicle in track curve section 1 FIG. 6 is a simplified plan view showing the relative relationship between the pair of wheel axles 5 and 5. In the trajectory curve portion of the radius of curvature R, the deviation angle θ ₂ when each wheel axle 5, 5 passes through the center of curvature O of the trajectory is expressed by the following equation. ^{_{θ 2 = Sin -1 (WB /}} 2R) Usually, since it is ^{_{WB«2R, θ 2 = Sin -1 (}} WB / 2R) ≒ WB / 2R ......

From the equation, the following equation holds. θ ₁ / θ ₂ = (BB / 2R) / (WB / 2R) = BB / WB ∴θ ₂ = θ ₁ / (BB / WB) …… In other words, from the formula, the bogie 1 for railway vehicles is biased by the radius of curvature R. When the deviation angle θ ₁ is generated and the deviation angle θ ₂ = θ ₁ / (BB / WB) is generated in the wheel shaft 5, the wheel shaft 5 can be directed to the center of curvature. It is arranged on the left and right outer sides of the bogie frame 2 in order to generate the deviation angle θ ₂ = θ ₁ / (BB / WB) on the wheel axle 5 in conjunction with the deviation angle θ ₁ of the railcar bogie 1. One cylinder B16 and two cylinders A15, 15 are used.

FIG. 6 is a skeleton perspective view of the railcar bogie 1. Each pair of cylinders A15, 15 is arranged between the left and right outer sides of the bogie frame 2 and each wheel axle 5, 5 so that both ends thereof are rotatably supported. Both ends of the bogie frame 2 are rotatably supported between the left and right outer central portions of the bogie frame 2 and the vehicle body 12. Both sides of the piston A17 of each cylinder A15 are connected to both sides of the piston B18 of the cylinder B16 by pipes 19 and 19. Due to the fluid filled therein, the deviation angle θ ₂ of the wheel set 5 is It is interlocked with polarized preferred angle theta ₁ of the vehicle bogie 1. A sectional view of the cylinder A15 is shown in FIG. The cylinder A15 is provided with a piston A17, which enables piston movement. As with the cylinder A15, the cylinder B16 is provided with a piston B18 to enable piston movement (see FIG. 7). The front end side sectional area of the cylinder A15 is So _A , the base end side sectional area is Si _A , the front end side sectional area of the cylinder B 16 is So _B , the base end side sectional area is Si _B , and the cylinder A15 and the cylinder B16 are So. Assuming that _A / Si _A = So _B / Si _B , the cross-sectional areas of the corresponding portions of the two cylinders A15 and B16, for example, the ratio of Si _B to Si _A , are defined by the following equation. Si _B / Si _A = (2l ₂ · WB) / (l ₁ · BB)

The operation of the railcar bogie 1 in the track curve section will be described. FIG. 6 and FIG. 8 show a perspective view and a plan view of main parts of the railcar bogie 1 in the front part of the vehicle in the track curve section of the left curve. At the curve section of the track, the car body 12 rotates in the direction of arrow P by the deviation angle θ ₁ (the railway vehicle trolley 1 rotates in the opposite direction relative to the car body 12 by the deviation angle θ ₁ ), and the railway vehicle When the center line of the carriage 1 in the width direction passes through the center of curvature O of the track (see FIG. 4), the cylinder B16 is moved in the direction in which the volume of the chamber 20 on the base end side decreases. The fluid extruded from the chamber 20 on the base end side of the cylinder B16 enters the chambers 21, 21 on the base end side of the cylinders A15, 15 through the pipe 19. Along with this, the fluid pushed out from the chambers 22 and 22 on the tip end side of the cylinders A 15 and 15 enters the chamber 23 on the tip end side of the cylinder B 16 through the pipe 19, and the gap between the wheel shafts 5 and 5 on the curvature center side is Narrowed.

When the vehicle body 12 rotates in the direction of the arrow P by the deviation angle θ ₁ , the volume of the fluid pushed out from the chamber 20 on the base end side of the cylinder B 16 is Si _B · l ₁ · θ ₁ ... Since the pistons A17, 17 of the two shaped cylinders A15, 15 are moved, the amount of movement of each piston A17, 17 is as follows: Si _B · l ₁ · θ ₁ · (1/2) · (1 / Si _A ) ... When the piston A17 of the cylinder A15 is moved by the formula, the wheel shaft 5 is rotated around the center in the longitudinal direction by the angle θ shown by the following formula. θ = Si _B · l ₁ · θ ₁ · (1/2) · (1 / Si _A ) · (1 / l ₂ ) ……

In the railcar bogie 1 of the present invention, since Si _B / Si _A is determined by the equation, if the equation relationship is substituted into the equation, θ = (WB / BB) · θ ₁ ...... a Since this deviation angle θ is equal to the deviation angle θ ₂ shown in the equation, the wheel shaft 5 passing through the trajectory curve portion of the radius of curvature R always passes through the curvature center O of the trajectory.

When the vehicle body 12 rotates in the direction of the arrow P by the deviation angle θ ₁ , the fluid pushed out from the cylinder B 16 on the side far from the center of curvature O of the track becomes the chamber 23 on the tip side and is moved by this fluid. The movement directions of the pistons A17, 17 of the cylinders A15, 15 are opposite to those of the pistons A17, 17 of the cylinders A15, 15 on the side closer to the center of curvature O, and the respective wheel axles 5 are in the same direction around the center in the longitudinal direction. It is rotated by the deviation angle θ ₂ .

It should be noted that the requirement of the above equation is that the railcar bogie 1 has an offset angle θ₁, The wheel axle 5 has a deviation angle θ ₂ It is determined that the volume of the fluid pushed out from one cylinder B16 is exactly equal to the volume of the fluid introduced into the two cylinders A15 when it is rotated by only one. In this case, the ratio of the cross-sectional area on the distal end side to the cross-sectional area on the proximal end side of each of the cylinders A15 and B16 is kept constant.

[0019]

[Effect of the device]

 According to the present invention, since the cylinders are provided between the bogie frame and the vehicle body of the bogie for rail cars and between the bogie frame and each wheel axle, and the corresponding portions of these cylinders are connected, the front and rear of the car at the curve section of the track are connected. The wheel axle can be automatically oriented to the center of curvature of the track. Therefore, the wear of the wheels and rails caused by the slip between the wheels and rails is prevented, and the noise is reduced, and the stability and speed of running on the curve section of the track are improved, and it is possible to prevent snake movements. Can also increase stability.

[Brief description of drawings]

FIG. 1 is a plan view of a railcar bogie showing an embodiment of the present invention.

FIG. 2 is a front view of the railway vehicle bogie shown in the embodiment.

FIG. 3 is a simplified front view showing the relationship between the vehicle body and the railcar for the embodiment.

FIG. 4 is a simplified plan view showing a relationship between deviation angles of a vehicle body and a bogie for a railroad vehicle in a track curve portion.

FIG. 5 is a simplified plan view showing an eccentric angle between a bogie for a railroad vehicle and an axle in a track curve portion.

FIG. 6 is a skeleton perspective view of a railway vehicle bogie in the embodiment.

FIG. 7 is a simplified cross-sectional view of a cylinder in the embodiment.

FIG. 8 is a simplified plan view showing a left side deviation angle of a front bogie for a railway vehicle with respect to a traveling direction.

FIG. 9 is a simplified plan view showing a conventional example.

[Explanation of symbols]

1 Bogie for Railway Vehicles 2 Bogie Frame 5 Wheel Shaft 7 Axle Box 12 Body 15 Cylinder A 16 Cylinder B 17 Piston A 18 Piston B 19 Piping S _A Piping S _A Cross Section Area of Cylinder A Si _A Cross Section Area of Cylinder A So _A Cylinder from the longitudinal center of the cross-sectional area l ₁ truck frame on the distal end side of the cross-sectional area Si _B cross-sectional area of the base end side of the cylinder B So. _B cylinder B of the cross-sectional area of the distal end side of a S _B cylinder B to the center of the cylinder B Distance l ₂ Distance from the vertical center of the bogie frame to the center of cylinder A BB Distance between the centers of a pair of bogie frames WB Distance between wheel axles of the bogie frame

Claims (1)

[Scope of utility model registration request] 1. A railway vehicle in which a pair of wheel sets are arranged in front of and behind a bogie frame, and bearing housings for holding the wheel sets are supported so as to be movable in the up-down, left-right, and front-rear directions with respect to the bogie frame. In the bogie, both ends are rotatably supported between the bogie frame and the vehicle body, and the bogie frame and each axle box of the wheel set, and a cylinder B and a cylinder A connected to an oil tank for oil leak compensation are provided. The piston B of the cylinder B is connected to both sides of the piston of the cylinder A by pipes.
Sectional area of the cylinder B S _B and the cylinders A corresponding thereto
Of the cross-sectional area S _A of the vertical center line of the bogie frame to the center of the cylinder A is l ₂ , the distance between the centers of a pair of bogie frames is BB, and the longitudinal center line of the bogie frame is to the cylinder B. When the distance to the center is l ₁ and the distance between the wheel axles of the bogie frame is WB, it is determined that the relationship of S _B / S _A = (2l ₂ · WB) / (l ₁ · BB) is satisfied. A bogie for railway vehicles.