JPS61241259A - Steering truck - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a radial bogie that automatically steers in the wheel axis direction when passing through a curved track or the like.

[Technical background of the invention and its problems]

In general, in railway vehicles used in transportation, maneuverability and running stability at high speeds are often contradictory to each other.

That is, in this case, the maneuverability refers to the curve passing performance of the rail in the case of a bogie, and the running stability during high-speed running corresponds to the stability of meandering behavior.

On the other hand, self-excited vibrations called "snaking" occur in railway vehicles when they run at high speeds. Furthermore, even on a track with almost no deviations, when a stable limit speed is exceeded as the running speed increases, the car body and bogie begin to vibrate naturally. In other words, primary snake behavior (vehicle body snake behavior) in which the vehicle body shakes significantly occurs as the traveling speed increases. Furthermore, as the speed increases, the imaging of the vehicle body subsides, but a secondary snake behavior (bogie snake behavior or wheel axle snake behavior) occurs in which the bogie and wheel axle violently vibrate.

Although the above-mentioned steering action can be relatively easily prevented by a damper that suppresses the left-right movement of the vehicle body, the secondary meandering action may eventually lead to derailment.

The speed at which the secondary snake behavior occurs (critical speed) is expressed by the following equation using a very simple model.

b: Half of the gauge γ: Wheel radius λ: Wheel tread slope m: Wheel axle mass K It is.

Using the above formula, it is possible to grasp a qualitative tendency to increase the critical speed.

That is, in order to increase the critical speed and run stably without secondary meandering even at high speeds, (1) the axle box support rigidity should be increased; (2) Reduce the road surface slope of the wheels. (
3) Increase the radius of the wheels.

(4) Reduce the mass of the wheel set. (5) Gauge (rail)
Make it wider.

The following conditions are necessary.

The Shinkansen bogie is a bogie that satisfies these conditions. In this bogie, play that would equivalently lower the axle box support rigidity is minimized as much as possible, and the wheelset is supported by an axle box support device with sufficient rigidity. Also, the tread slope is 1/40 due to the design.
And it's small. However, this deteriorates the curve passage performance, so the radius of the curve on the main line is made extremely large.

Next, considering only the qualitative aspects of curve passing performance using the simplest model, we can calculate the steady lateral force generated on the wheels by ignoring the displacement of the car body and bogie frame, corresponding to the above equation (1). The calculation is as follows: % formula %: where, a: half of the distance between wheels, K: creep coefficient, R
: is the radius of curvature of the orbit, and the other symbols are the same as in formula (1) above.

According to the above equation (2), the following conditions are required in order to pass through the low curve.

That is, (1) the axle box support rigidity is lowered; (2) Increase the road surface slope of the wheels. (3) Reduce the radius of the wheels.

(4) Narrow the distance between the wheel axles. (5) Narrow the gauge.

Requires conditions such as:

In this way, the above-mentioned conditions for high critical speed and curve passing performance are exactly opposite conditions, and as a result, increasing the critical speed and lowering the lateral force when passing through a curve due to curve passing performance. An important issue in bogie design is where to make compromises.

On the other hand, a radial truck uses a link mechanism to improve the running performance of the truck.

That is, as shown in FIG. 11, the radial truck has a pair of axle boxes b, b at the front and rear of the truck frame a.
, cl, C2 are provided, and these double shaft boxes b1゜b2 and C1,
Each axle e that is integrated with each wheel d is mounted on C2, and the above-mentioned two axle boxes, b2 and C1°C, and the corner a of the above-mentioned bogie frame a
, C2, as.

The axle box support springs f, f, g, and Q are interposed in the axle box a, and the two wheel boxes b2 and 01°C2 are connected by cross anchor links h and h2.

A radial truck having such a configuration is configured to restrain the wheel set e from moving other than this, without preventing the wheel set e from moving along the track i.

Furthermore, when each of the cross anchor links h and h2 of the radial bogie described above is used, curve passing performance is improved.

In particular, this method has a remarkable effect on curved tracks with small radii where the flanges come into contact, but when applied to actual bogies, how can we prevent the play that can easily occur in link mechanisms?
Problems include how to incorporate a link mechanism in an electric truck, and how to compensate for the increase in unsprung mass that increases by the weight of the link mechanism.

On the other hand, the above-mentioned radial bogie, which allows the bogie to pass smoothly on curved roads, takes into consideration how to run stably up to high speed ranges, and as much as possible, the two axles in the front and rear of one bogie are In designing the bogie, it is important to support the wheels in parallel with high-rigidity materials, and to support them in the axial direction of the axle with slightly softer rigidity.

On the other hand, by allowing each axle to freely swivel relative to the trolley, or by restraining the two wheels from moving in a ■ or eight shape when the two wheels swivel relative to each other, it is possible to There is the above-mentioned radial bogie that generates meandering motions, and these meandering motions generate a function of smoothly turning the bogie along the curved path of the rail.

In the case of this radial bogie, the meandering of the wheels is caused by the wheel tread (
This is determined by the taper shape of the tire surface) and the gap between the seven lunges of the wheel and the rail. Therefore, in order for the wheel to easily travel on sharp curves (steep curved roads), the shape of the tread taper of the wheel relative to the rail must be adjusted. The wheels have been designed to have a special arcuate shape, and the wheels are placed slightly on the outside of the track on curved tracks, so that the wheelset turns with a small radius of curvature.

In this way, in addition to making use of the meandering nature of the wheelset itself to make it pass through curves, there is also a method to prevent the collision between the bogie and the car body placed on it that occurs when the bogie enters a curved road. The radius of curvature of the curved road on which the vehicle is traveling is detected from the relative rotation angle (oscillation angle), and the link mechanism connects the center of each wheel axle so that the center line of each wheel axle points normally in the direction of the radius of curvature of the curved road. A new "semi-forced steering system" has been proposed in which the vehicle is restrained by

As shown in FIG. 11, the already proposed radial bogie has a pair of front and rear wheels at the front and rear of the bogie frame a so that the taper of the wheel tread surface (tire surface) produces a meandering motion with an appropriate wavelength. Axle boxes b2゜01, C2 are provided, and each axle box support spring f, f2゜Ql, Q2 holds each axle box b, b, C, C2 with appropriate rigidity on the front and rear, left and right sides,
Further, each of the cross anchor links h and h2 is configured to intersect and connect the axle boxes b and b.

In this case, the wheel axle e forms a tapered surface or an arcuate tread surface on the road surface (tire) of each wheel d.

In this way, when the above-mentioned radial bogie travels on a straight path of rails, each wheel axle (axle) e becomes parallel, and the radial bogie moves straight without contacting the flange of each wheel d with the rail i. .

On the other hand, when the radial bogie enters a curved road, the leading wheels d of this bogie approach the outer track side of the curved road.
Due to the function of the tapered surface or arcuate tread surface of each wheel d, the outer wheel d moves forward, while the inner wheel d lags behind. At the same time, when the trailing wheel d enters a curved road under normal circumstances, this trailing wheel d approaches the inner soft side of the curved road, but due to the function of the tapered surface or arcuate tread surface, the inner side wheel d d moves forward, and its outer wheel d lags behind.

At this time, since the axle boxes b-b, c, and C2 are mutually restrained by the cross anchor links h and h2, the front passage of the axle boxes S and C2 and the axle boxes S and C2 are Since the amount of backward travel is equal, as a result, the center line extensions of each wheel set (axle) e intersect at the center point of the curved road, and each wheel set has a curvature of the outer track side and inner soft side of the track. Equilibrium is reached when the wheels move toward the outer track side by the radius ratio until the wheel diameter ratios match. In particular, it is possible to pass through curved roads without the seven lunges of the wheels coming into contact with the rails. Furthermore, the characteristics of this radial bogie using the two-wheel meandering characteristic are stable running up to high speeds, and although there are differences due to the configuration of the cross anchor links h1 and h2, it has a good track record.

In this way, a radial bogie can travel on a curved road using the meandering action of the wheel axle alone without mechanically connecting the two wheel axles as described above, and although the range of stable running speed is reduced, Structurally, there are fewer complicated parts, and when it is used only in a low speed range, it is useful in terms of maintenance and inspection and the cost of the trolley.

However, the above-mentioned radial bogie is easier to deal with when there is an abnormal misalignment or a foreign object such as a stone on the rail, or when the normal wheel transfer is impaired, than when this axle is connected to a two-wheel axle. I turned in an abnormal direction,
There is a risk of abnormal vehicle vibration or derailment.

On the other hand, technical means for controlling the direction of the axle by the turning angle of the bogie with respect to the car body, for example,
As shown in Japanese Patent Publication No. 9-32816 and Japanese Patent Publication No. 50-24488, the rotation angle between the car body and the bogie is detected geometrically to change the spacing between front and rear, left and right axle boxes. , This is because the lateral pressure of the wheels is used for the steering force of the wheel axle, so the lateral pressure of the wheels increases, or
Because the speed at which the bogie swings along the curved track and the time it takes for the wheelset to point to the center of the curved road do not necessarily match, it is necessary to provide a shock absorbing mechanism, resulting in a complex structure. Therefore, there are drawbacks such as troublesome assembly, adjustment, and maintenance/inspection.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and is provided with a bogie that is equipped with a wheel axle running on rails and on which a car body is mounted. When the angle is abnormal judging from the angle, the semi-forced steering mechanism steers the wheel axis direction of the truck and
The object of the present invention is to provide a steering bogie whose purpose is to prevent lunge wear and derailment, and at the same time, to improve the safety of the bogie.

[Summary of the invention]

The present invention provides a bogie equipped with a wheel axle that runs on rails and on which a car body is mounted, each axle box being provided on each of the axles located at the front and rear of the bogie, and each axle box and a part of the car body being connected to each other. In between, a semi-forced steering mechanism with a function to detect the swing angle between the bogie and the car body is installed, and if for some reason the swing angle of the wheelset relative to the bogie is judged from the swing angle of the bogie and car body. When the angle becomes abnormal, the semi-forced steering mechanism is activated to steer the wheel in the direction of the wheel axis, thereby preventing flange wear and derailment.

[Embodiments of the invention]

Hereinafter, an illustrated embodiment in which the present invention is applied to a linear motor propulsion truck will be described.

In Figures 1 to 3, the reference numeral 1 indicates a rail.
A linear motor feed plate 2 is laid in the length direction of the rail on the gauge of this rail 1.
Railway cars are designed to run on top. Moreover, a bogie underframe (hereinafter simply referred to as underframe) 3 is provided above the rail 1, and is configured to have a substantially H shape. , a pair of rocking pillow guide pieces 5a, 5b are installed in the middle of each of the rocking pillow guide pieces 5a, 5b, and both ends of the rocking pillow 6 are placed over the respective integral rocking pillow guide pieces 5a, 5b to straddle the above-mentioned side beams 4a, 4b. In addition, the pillow springs 7a and 7b are interposed between air springs. Further, a center plate hole 8 is bored in the center of the rocking pillow 6, and a center plate 9a of a center plate 9, which is integral with the vehicle body, passes through the center plate hole 8 and is shaft-mounted therein. . Zaranimata, the above underframe 3
Each axle box 10a, 10b, 11a, 11b is provided via each axle spring 12 at the front and rear end portions of a pair of side beams 4a, 4b constituting the 11a, 11bkt* Axles 14a, 14b integral with each wheel 13a, 13b are rotatably mounted.

On the other hand, each of the axles 14a and 14b located directly above the linear motor feed plate 2 is provided with a bearing 15 and a spherical bearing 16, respectively. They are provided on the linear motor feed plate 2 so as to face each other.

In particular, each bracket 17a is attached to the linear motor feed plate 17 where the bearing 15 and the spherical bearing 16 are located.
, 17b are provided so as to straddle the bearing 15 and the spherical bearing 16, and both brackets 17
a and 17b are rotatably connected to the bearing 15 and the spherical bearing 16 by respective rotation center pins 19 and 20.

Further, an ear ring 17C is attached to the upper surface of the linear motor mounting plate 17 near the bracket 17b, and a traction rod 22 is mounted on the ear ring 17C with a pin. The other end portion of 22 is pivotally connected to the center rest 9a of the center plate 9 by means of a pin 23.

On the other hand, as shown in FIG.
1a, each ear piece 10c, 11c is formed to face each other inwardly, and both ear pieces 10c, 11c have a
The working rods 26, 27, which are respectively pivotally mounted to the underframe 3 at respective pins 24,25, are loosely fitted into play spaces 30a, 30b formed by respective guide pins 28,29.

In addition, an intermediate stacking rod 31 is pivotally attached to the middle of the underframe 3 where the both ear pieces 100.11G are located, and the intermediate stacking rod 31 has two ends at both ends thereof. Connecting rods 33, 34, which are pivoted to the operating rods 26, 27, are connected to each other. Further, a connecting rod 35 is pivotally attached to one end of the intermediate stacking rod 31, and one end of the connecting rod 35 is attached to a hanging rod 36 that is integral with the vehicle body, as shown in FIG. is connected to. In this way, the operating load rods 26, 27, the intermediate load rod 31, the connecting rods 33 and 34, and the connecting rod 35 constitute a semi-forced steering mechanism 37.

Therefore, when traveling on a straight road on the rail 1 or on a curved road shown in FIG. While traveling, the underframe 3 and the frame body can swing freely by means of the center rest 9a of the center plate 9, and an axle 14a integral with both wheels 13a, 13b; 15a and the underframe can freely meander and travel with respect to the rail 1 by bearings 15 and spherical bearings 16.

On the other hand, the semi-forced steering mechanism 37 provided between the underframe 3 and the vehicle body 36 closes the idle gap 30 during normal driving.
A and 30b have a swing angle detection function that allows the robot to freely swing and meander freely.

That is, when traveling on a curved road shown in FIG. 3, for example, if the center of the bogie 3 is set to O and the center of the vehicle body is set to 02 with respect to the center O of the curved road, the vehicle body 36 will move along the curved road. When the vehicle is completely ridden and traveling, the extension of the center line of the wheel sets 14a and 14b is at the center O of the curved road, and the vehicle runs smoothly. In this case, the semi-forced steering mechanism 37 is not operating, and the idle gap 30a
.

30b.

However, due to some reasons, e.g. rails and wheels 1
If the flanges of 3a and 13b collide with each other due to irregularities in the rails, or if foreign objects on the rails hit, and the oscillation angle of the wheel axle with respect to the bogie becomes abnormal compared to the oscillation angle of the car body and the bogie, the above-mentioned The semi-forced steering mechanism 37 operates and the underframe 3
The free oscillation trajectory and free meandering of the vehicle body 36 and the vehicle body 36 are regulated to prevent any further oscillation or meandering motion.

Hereinafter, the operation of the present invention will be explained using mathematical formulas.

In FIGS. 1 to 3, each of the wheels 10a.

10b, 11a, 11b (7) Since each wheel set 14a, 14b can rotate around each rotation center bin 19.20,
The above-mentioned rail 1 and each wheel 10a, 10b.

It travels on the rail in a meandering motion following the shape of the tread (tire) within the range allowed by the clearance between the flanges 11a and 11b. When this exceeds a certain limit, it is regulated by the semi-forced steering mechanism 37.

In this case, the linear motor mounting plate 17 is attached to the wheel shaft 14.
Since the center positions of a and 14b are constrained, each of the axle springs 12 can be attached to each of the axle boxes 1 with proper front and rear, left and right spring constants.
0a, 10b, lla.

If 11b is held, there is no particular need for restraint between it and the underframe 3. In addition, the bearing 15 and the spherical bearing 16
There is a twist in the rail due to the action of the wheel set 14a.
, 14b are impaired, the spherical bearing 16 prevents the near motor feed plate 17 from being twisted.

Further, since the thrust generated by the linear motor feed plate 17 is directly transmitted to the vehicle body 36 which is integrated with the center plate 9 via the traction link 22, each axle box ioa.

Transmission in the longitudinal direction between 1ob, 11a, iib and the underframe 3 is no longer necessary. However, the traction force is
Since the center plate 9 that transmits the information to the rocking pillow 6 is fitted into the center of the rocking pillow 6, the positions of the both side beams 4a and 4b of the underframe 3 are held correctly by the rocking pillow guide pieces 5a and 5b. .

Next, when the bogie and the car body 36 travel on the curved road 1 shown in FIG. 3, in FIG. The bottle shaft 32 is connected to the stacking rod 31 from the position where the connecting rod 35 is connected.
The distance to the connecting rods 33 and 34 and the intermediate loading rod 31 to the bottle axis 32 is respectively C, and each connecting rod 33, 34 of each working loading rod 26, 27 and the bottle 24° 25 The distance from each guide bin 28°29 to each bin 24.25 is E, the distance from the center 01 of the bogie to the axle box 11a is F, and the distance from the center 01 of the bogie to the car body is Let G be the distance to the center 02 of 36,
Further, the distance between the two wheel axles 14a and 14b is 2H, the radius of the curved road is R, the angle θ1 is between the center O of the bogie and the car body center 02 from the center O of the curve, and the angle θ1 is from the center O of the curve The center of the truck 01 and each wheel axle 14a, 14
If the angle θ2 is between
The extension of the center line b coincides with the curve center O of the curved road 1.

In addition, if sin θ + tan θ2 Φθ2 holds in this 1, then sin & 1″″〒−−−−−−−−−−−−−−−−−
−°−−−−−−−−(1)°i′8 ″″1°°0
2=〒1°°02=〒-----°−° °Substituting (1) and (2) into equation (3), we get: With this, R in equation (4) above is When erased, it becomes.

Furthermore, in this case, A and FSGlH are dimensions given from the beginning, so the other dimensions only need to maintain the following relationship.

becomes.

Furthermore, the center lines of both wheel shafts 14a and 14b can be directed toward the center of the curved road, regardless of the radius of the curve as expressed by the above equation (6).

However, as a practical matter, a slack is given to a curved road so that the bogie 3 can smoothly pass through the curved road, but in a transitional section where the straight road changes to a curved road, the transition curve and the above-mentioned slack are applied. Attachment depends on the force applied to each wheel set 14a, 14.
b and the underframe 3 do not maintain the ideal relationship shown in FIG. For this reason, as shown in FIG. 2, play gaps 30a and 30b are formed in the semi-forced steering mechanism 37 in order to escape the unreasonable stress. Since the wheels are designed to travel without contacting each other, the underframe 3 and the vehicle body 36 can swing smoothly, and the wheelset's free meandering motion is not restricted.
If abnormal wheel axle oscillation occurs, a semi-forced steering mechanism restrains the wheel axle movement to ensure safe driving.

That is, each of the wheel axles 14a, 14b corresponds to the wheels 13a, 13.
The self-steering mechanism determined by the shape of the tread b steers the vehicle along the curved road, but each of the actuating rods 26 and 27 has a slight gap between them and the idle spaces 30a and 30b and each guide bin 28°. 29 and is displaced accordingly. For this reason, when the two wheel shafts 14a and 14b are running with normal self-steering characteristics, the operating load rods 26, 27, the intermediate load rod 31, the connecting rods 33, 34, and the connecting rods 35 are configured. The vehicle travels without any force acting on the semi-forced steering mechanism 37. However, the above semi-forced steering mechanism 3
Both wheel shafts 14a and 14b act as a reaction when 7 is activated.
No increase in lateral pressure occurs.

On the other hand, if a foreign object such as a pebble or a misaligned rail collides with either of the wheels 13a, 13b, the wheels will turn in an undesirable direction and the attack angle between the rail 1 and the flanges of the wheels 13a, 13b will be excessive. This may lead to abnormal wear of flanges and rails or derailment.

However, in the present invention, when the wheels 13a and 13b are about to turn in an abnormal direction, each of the guide bins 28 and 29 come into contact with the play gaps 30a and 30b, and the semi-forced steering mechanism 37 operates within a certain range. By steering the wheels 13a and 13b, the truck 3 can easily travel on a straight road or a curved road.

In other words, when the wheel sets 14a, 14b swing excessively, the semi-forced steering mechanism 37 restrains the wheel set direction and corrects the orientation of the vehicle body 36 in the direction along the track, as described above. There is. This correction force causes the wheels 13a to swing the head of the truck.

The lateral pressure acting on the 7 lunges of wheel 13b is used to correct the orientation of wheels 13a and 13b, thereby reducing the lateral pressure that actually occurs.

Therefore, the present invention basically corrects the wheel set 14a.

When 14b is running along the track, although it is a radial bogie, due to the shape and conditions of the abnormal route, the wheel axles 14a and 1
When the vehicle 4b tries to move away from the correct direction, the semi-forced steering mechanism 37 automatically controls the vehicle's movement.

In addition, in FIGS. 1, 2, and 3, the formidable IIJ steering mechanism is shown as being disposed only on one side of the underframe, but each wheel axle is located at the rotation center pin 1 relative to the linear motor.
9. Since it is rotatable at 20, it is sufficient to satisfy the condition just by placing it on one side of the underframe, but even if a semi-forced steering mechanism is placed on both sides of the underframe, it is not functional at all. There is no difference between the two, which is preferable in terms of improving reliability.

Next, the conditional expression for the semi-forced steering mechanism shown in FIG.
), the connecting rods 33, 34 are directly connected to the axle boxes 10a, 1
Even if it is combined with 1a, there will be no problem with the answer. In this case, it is sufficient to ensure that /D=1.

Next, in another embodiment of the present invention shown in FIG. 4, a semi-forced steering mechanism 37 is provided on an ordinary truck that does not use a linear motor, and each axle box 10a is provided with a semi-forced steering mechanism 37.

Connecting rods 38a of the same shape and size are attached to 10b, 11a, and 11b.
, 38b, 39a, 39b, the triangular actuating plates 40a, 40b attached to the truck 3 and the actuating rods 26'
, 27', and each 327' is connected to each connecting rod 41a.
, 41b, and has the same function as the embodiment described above.

On the other hand, another embodiment of the present invention shown in FIG.
A modification of the embodiment shown in the figure, in which the internal actuating plate 40a
, 40b and 8 actuation ['F26'.

This connects each axle box 10a and 11b with each connecting rod 38a.

The shaft boxes 10a, 10b, 11a are connected to both free ends of the horizontal rod 42 of the underframe 3 via 39b.

11 and b are connected by cross anchor links 43 and 44, and a semi-forced steering mechanism 37 is incorporated therein, as in the above-mentioned specific example.

On the other hand, the other embodiment of the present invention shown in FIGS. 6 and 7 is a modification of the above shown in FIG.
An intermediate load rod 31 is superimposed and pivotally attached to the working load rod 26' by a support shaft 45 pivotally connected to the truck, and each locking pin 47a of the coil spring 46 is locked at the middle of the working load rod 31. , 4
At 7b, play spaces 30a and 30b are provided to restrain the working rod 27'.

Next, the embodiment shown in FIGS. 9 and 10 is a modification of the embodiment shown in FIG.
L-shaped connecting frame 4 at 0a, 10b, 11a, 11b
3' and 44' are provided, and these connecting frames 43' and 44 are provided.
'Each ear piece 43a' in the middle.

448' is attached, and this both-ear piece 43a'.

44a' are pivotally connected by a support shaft 48, and both connecting frames 43'
, 44' have a cross-anchor link function, and a bell crank 50 pivotally attached to the truck 3 is connected to the ear piece 44a' via a connecting rod 49, and an idle gap 30b is formed in the bell crank 50. However, this play gap 30b
A guide bin 29 provided at the free end of the connecting rod 49
This is the result of engagement.

The embodiment shown in FIG. 9 above can be explained using mathematical formulas with reference to FIG. 10 as follows. Also, the first
The same reference numerals in FIG. 0 are used for the same components as those shown in FIG. 3.

Substituting equations (1)' and (2)' into equation (7), we get this)
If R in equation (8) is eliminated, then if selected, even if abnormal stress acts on the semi-forced steering mechanism 37 constituting the steering link system, the underframe 3 It is possible to restrain the free swinging motion and free snake motion of the vehicle body 36 and the vehicle body 36, thereby allowing safe travel.

〔Effect of the invention〕

As described above, according to the present invention, wheel axles 14a and 14b are provided which are integral with the wheels 13a and 13b running on the rails, and the wheel axles 14a and 14b are positioned in front and behind the underframe 3 in the 3 on which the vehicle body is mounted. Each axle box 1 is attached to each wheel axle 14a, 14b.
0a,, 10b.

11a and 11b are provided, and each axle box and part 3 of the vehicle body are provided.
A semi-forced steering device 137 is installed between the underframe 3 and the car body, and is equipped with a semi-forced steering device 137 that has a function to detect the swing angle between the underframe 3 and the car body, and is used to detect if the swing angle between the bogie and the car body becomes abnormal for some reason. When
Since the semi-forced steering mechanism 37 is operated to steer the wheels in the direction of the wheels, wear of the flanges of the wheels and derailment can be prevented, and the safety, performance and reliability of the bogie during high-speed running can be improved. Can be done.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a steering truck according to the present invention, and FIG.
FIG. 3 is a plan view showing the above-mentioned steering truck with some parts omitted,
Figures 4 to 10 are diagrams for explaining the present invention in detail; Figures 4 to 10 are diagrams showing other embodiments of the present invention; Figure 11 is a plan diagram diagrammatically showing a radial truck that has already been proposed. It is a diagram. 1...Rail, 3...Underframe, 4a, 4b...Side beam,
6... Rocking pillow, 9... Heart plate, 10a, 10b, 11a
, 11b...Axle box, 12...Axle spring, 13a, 13
b...Wheel, 15...Bearing, 16...Spherical bearing, 19°20...Rotation center pin, 22...Traction link, 26°27...Working rod, 28. 29...
Guide bin, 30a, 30b... play gap, 31...
- Intermediate stacking rod, 33.34...Connecting rod, 35...Connecting rod, 37...Semi-forced steering mechanism. Applicant's agent Kiyoshi Inomata Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. In a bogie equipped with a wheel axle that runs on rails and on which a car body is mounted, each axle box is provided on each axle located at the front and rear of the bogie, and each axle box and A semi-forced steering mechanism with a function to detect the swing angle between the bogie and the car body is installed between the part of the car body and the swing angle between the bogie and the car body and the car body. A steering truck characterized in that when the relationship between the swing angles of the wheel axles becomes an abnormal angle, the semi-forced steering mechanism operates to forcibly steer the wheel axle direction. 2. The steering truck according to claim 1, wherein a floating gap is formed in a part of the semi-forced steering mechanism. 3. The steering truck according to claim 1 or 2, wherein a part of the semi-forced steering mechanism is provided with an elastic body that urges the tendency to return to the original position.