JPH038311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a bolsterless bogie for a railway vehicle, and is particularly suitable for adjusting the height of a vehicle body.

[Background of the invention]

Examples according to the prior art are shown in FIGS. 1 and 2. In the case of a bolsterless bogie, the car body 1 rests directly on a bogie frame 6 via an air spring 4. The bogie frame 6 rests on a wheel axle 8 via an axle spring 7.

In normal use, the wheel treads are ground every one to two years, so the diameter of the wheels gradually becomes smaller and the height of the vehicle body 1 becomes lower. In order to adjust this, it was common practice to insert a liner 2 between the vehicle body 1 and the top plate 3 of the air spring 4 to adjust the height.

Figure 2 shows the adjustment procedure. When the air in the air spring 4 is released after the saddle 9 is inserted between the car body 1 and the bogie frame 6, the air spring 4 contracts and the bow 9 transmits the load of the car body 1 to the bogie frame 6. When the air spring 4 is further compressed, a gap is created between the top plate 3 and the vehicle body 1, so it is extremely easy to use this gap to adjust the amount of the liner 2. After adjusting the liner, air spring 4
When the air spring 4 is injected with air, the air spring 4 stretches and bears the load of the vehicle body 1, so that the saddle 9 can be removed.

In the case of such a conventional technique, the diameter D of the top plate 3 of the air spring 4 is usually 600 to 700 mm, which causes the problem that the liner 2 is extremely large and heavy, making it inconvenient to handle.

If a liner is inserted between the lower plate 5 of the air spring 4 and the bogie frame 6, the liner can be made smaller and lighter because the lower plate 5 has a diameter d of about 300 mm. but,
If this method is adopted, the bottom plate 5 and the bogie frame 6 must be removed if the car body 1 and air spring 4 are not removed when adjusting the liner.
There was a problem in that it was not possible to insert a liner in between, making adjustment work troublesome.

[Purpose of the invention]

An object of the present invention is to provide a bolsterless bogie for a railway vehicle that uses a small liner and allows easy liner adjustment work.

[Summary of the invention]

In the present invention, a liner receiving surface facing the upper surface of the bogie frame is formed on the outer peripheral portion of the lower plate constituting the air spring, and support is provided between the portion of the lower plate closer to the center of the air spring than the liner receiving surface and the bogie frame. Place the parts,
The present invention is characterized in that a push-up means capable of supporting at least the individual weight of the air spring and lifting the lower plate relative to the truck frame is installed between the support member and the lower plate.

[Embodiments of the invention]

Hereinafter, each embodiment according to the present invention will be explained with reference to FIGS. 3 to 7. First, one embodiment of the present invention will be described with reference to FIG. 3 and FIGS. 4a and 4b. In the figure, the same reference numerals as in the conventional example indicate the same members. 11 is a top plate constituting the air spring 12; 13;
is a bottom plate constituting the air spring 12. A diaphragm and a laminated rubber 17 are installed between the upper plate 11 and the lower plate 13. The laminated rubber 17 is formed into a roughly donut shape and is joined to the upper surface of the outer housing portion of the lower plate 13. The joint portions of the upper plate 11, the diaphragm, the laminated rubber 17, and the lower plate 13 all have an airtight structure. Reference numeral 14 denotes a liner inserted into the opposite side of the bottom plate 13 from the position where the laminated rubber 17 is installed, that is, the opposing portion between the lower surface of the outer peripheral portion of the bottom plate 13 and the upper surface of the truck frame. The contact surface of the lower plate 13 with the liner 14 is formed to face the upper surface of the bogie frame. 1
Numeral 6 is a pin provided on the upper surface of the upper surface plate 11, and is used to position the air spring 12 on the vehicle body. Reference numeral 19 is a positioning metal having a dowel 15 in the center of its lower surface and a cylindrical portion on its upper surface that is fitted into the recess of the lower surface plate 13. This corresponds to a support member when pushing up. The positioning metal 19 positions the air spring 12 on the truck frame by means of the dowel 15. Further, a seat is formed on the outer peripheral portion of the cylindrical portion of the positioning metal 19, and a spring 18 is provided between the seat and the lower plate 13. This spring 18 is
When the air inside the air spring 12 is removed, the air spring 12
The top plate 11, diaphragm, and laminated plate 1 that constitute the
7 and the lower plate 13. The spring 18 is a pushing means.
Furthermore, on the inner surface of the cylindrical portion of the positioning metal 19,
A cylinder provided on the lower surface of the lower plate 13 is inserted,
An O-ring 20 is provided between the two to maintain airtightness in a slidable state. In addition, the bottom plate 1
The chamber formed by the cylinder 3 and the cylindrical portion of the positioning metal 19 is communicated with an auxiliary air chamber formed in the bogie frame through a hole passing through the spigot 16. Further, this chamber and the air chamber of the air spring 12 are communicated through a diaphragm 21 provided at the center of the lower plate 13. The auxiliary air chamber is formed to obtain an appropriate spring constant for the air spring 12, and the throttle 21 is for damping the operation of the air spring 12.

In such a structure, the vehicle body 1 is normally supported on the bogie frame 6 by utilizing the spring action of the air spring 12, as shown in FIG. 4a. When it becomes necessary to adjust the height of the vehicle body 1 due to grinding of the wheel axle tread, etc., the saddle 9 is first placed between the vehicle body 1 and the bogie frame 6. When the air spring 12 is deflated in this state, the gap between the vehicle body 1 and the bogie frame 6 is maintained in a normal state by the gap 9, and the diaphragm of the air spring 12 contracts. Along with this, the load of the vehicle body 1 that was acting on the lower plate 13 is removed, so that the lower plate 13, the laminated rubber 17, which constitutes the air spring 12 by the spring 18, as shown in FIG. 4b, The diaphragm and the top plate 11 are pushed up against the truck frame 6 via the positioning metal 19. By this operation, the bottom plate 13
A gap is formed between the liner receiving surface and the bogie frame 6. A necessary liner 14 is inserted between these lines in the direction shown by the arrow in FIG. 4b.

After the liner 14 is inserted between the lower plate 13 and the truck frame 6 in this manner, compressed air is supplied to the air spring 12 to inflate it to its normal state. As a result, the load of the vehicle body 1 is supported by the air spring 12, the spring 18 is compressed, and the lower plate 13 is placed in its original position on the bogie frame 6 along the cylindrical portion of the positioning metal 19. It turns out.

According to this configuration, since the liner 14 is installed between the lower plate 13 and the bogie frame 6, the lower plate 13 has a smaller diameter than the upper plate 11, and the liner 14 itself is made of a small and lightweight piece. Can be done. In addition, a saddle 9 is installed between the car body 1 and the bogie frame 6,
Moreover, simply by letting the air out of the air spring 12, the lower plate 13 automatically rises, so that the liner 14 can be easily inserted or removed. There is no need for complicated work such as separating the car body and truck and removing the air spring from the truck frame.

FIG. 5 is a detailed view of main parts showing another embodiment of the present invention. In the previous embodiment, the O-ring 20 was used to provide an air seal against the relative movement caused by the expansion and contraction of the spring 18 between the bottom plate 13 and the positioning metal fitting 19, but in this example, the O-ring 20 can be expanded and contracted vertically. A bellows 22 that maintains airtightness is used to eliminate sliding parts. In this embodiment as well, the procedure for adjusting the liner using the lower plate 13 is completely the same as in the previous embodiment.

FIG. 6 is a detailed view of an air spring section showing still another embodiment of the present invention.

First, when the saddle 9 is placed between the car body 1 and the bogie frame 6 and the air in the air spring 12 is let out, the air spring 12 contracts and the top plate 11 separates from the car body 1 and moves down. Next, when a tool is applied to the claws 23 provided on the outer periphery of the lower plate 13 and the lower plate 13 is rotated, the positioning fittings 19, anti-vibration rubber 24, and screw plate 25 are positioned on the trolley frame by the detents 27 and do not rotate.
Due to the action of the screw 26 provided on the screw plate 25, the portion of the air spring 12 above the lower plate 13 rises upward. Therefore, since there is a gap between the bottom plate 13 and the bogie frame, the liner 14 can be easily adjusted.

After adjusting the liner, if the lower plate 13 is first turned in the opposite direction, it will descend downward, and the lower plate 13 will come into close contact with the bogie frame 6 via the adjusted liner 14. The vibration-proof rubber 24 is connected to the bottom plate 13 and the liner 14.
This is to provide relief so that excessive force is not applied to the screw 26 when the adhesion is poor. The O-ring 20' is installed for sealing when the bottom plate 13 moves up and down.

FIG. 7 shows a modification of FIG. 6, in which the air spring 12
This shows the case where all air intake and exhaust to and from the engine are performed from above. In this case, since the space between the positioning metal fitting 19 and the bottom plate 13 does not form an air chamber, the O-ring is omitted.

Furthermore, according to the present invention, even in a truck having a structure in which the air spring top plate is recessed into the vehicle body, where it has been impossible to adjust the liner in the past, the liner can be adjusted as is.

〔Effect of the invention〕

According to the present invention, the liner can be made smaller, the liner adjustment work becomes easier, and the weight can thereby be reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view of a bolster-less truck according to the prior art, FIG. 2 is a front view of the truck in FIG. 4a and 4b are cross-sectional views showing details of the air spring section before and during liner adjustment; FIG. 5 is a detailed view of the main parts of another embodiment; FIG. 6
The figure is a detailed view of still another embodiment of the air spring portion of the truck according to the present invention, and FIG. 7 is a detailed view of the main part of a modification thereof. 1... Vehicle body, 6... Bogie frame, 7... Axis spring, 8
...Wheel axle, 9...Kura, 11...Top plate, 12...
... Air spring, 13 ... Bottom plate, 14 ... Liner, 15, 16 ... Inro, 17 ... Laminated rubber, 18 ... Spring, 19 ... Positioning metal fitting, 2
0,20'...O-ring, 21...diaphragm, 22...
...Bellows, 23...Claw, 24...Vibration-proof rubber, 2
5...screw plate, 26...screw, 27...rotation stopper.

Claims (1)

[Scope of Claims] 1. In a bolsterless bogie for a railway vehicle in which a car body is supported on a bogie frame via an air spring, a liner receiving surface facing the top surface of the bogie frame is formed on the outer peripheral portion of a lower plate constituting the air spring. A support member is disposed between a portion of the lower plate closer to the center of the air spring than the liner receiving surface and the bogie frame, and is capable of supporting at least the unit weight of the air spring, and is capable of supporting the lower plate relative to the bogie frame. A bolster-less bogie for a railway vehicle, characterized in that a push-up means for raising the support member is installed between the support member and the bottom plate. 2. A bolsterless bogie for a railway vehicle according to claim 1, wherein the pushing-up means is a spring whose axis is arranged in the direction of pushing up the lower plate. 3. In claim 1, the push-up means is formed by a threaded plate provided on the support member via a vibration-proof rubber and a screw formed on the bottom plate that is screwed into the threaded plate. A screw mechanism consisting of
A bolsterless bogie for a railway vehicle, characterized in that the axis of the screw mechanism is arranged in the direction of pushing up the bottom plate.