JPS5863568A - Supporter for journal box for railway rolling stock - 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 The present invention relates to an axle box support device for supporting an axle box of a bogie for a railway vehicle without using sliding parts and without play.

In an axle box support device for a railway vehicle bogie, it is preferable to eliminate sliding parts in order to facilitate maintenance and prevent performance changes over time. Furthermore, in high-speed railways, in order to improve riding comfort and running stability, the axle boxes are supported with appropriate elasticity in both the longitudinal and lateral directions, and the front and rear axles are always supported in parallel. Therefore, as shown in Japanese Utility Model Publication No. 35-20124, it is important to suppress the snake motion of the vehicle and the bogie. For this reason, as shown in Japanese Utility Model Publication No. 35-20124, it is important to , an axle box support device is known in which the links and leaf springs are combined with rubber bushings and are connected to support beams at both ends. That is, since they are provided both at the front and rear of the axle box, the overall length of the bogie structure is long, and the space for installing equipment under the car body is narrowed, and there are disadvantages in terms of bogie frame strength, weight, and other aspects.

On the other hand, in order to overcome these drawbacks, axle box support devices have been widely used that connect the bogie frame and axle box using rubber bushings or other means such as plate springs or links provided only on the bogie center side of the axle box. In this case, as shown in the IpH diagram, when vertical displacement occurs between the bogie frame 1 and the axle box 3 due to the deflection of the axle spring 2, the support arm 4 moves around the fulcrum 0. Since the fulcrum O position is at a fixed position on the bogie frame L during the swing arc rotation, a longitudinal displacement indicated by Δy occurs in the axle box 3, and the front and rear axles can always be maintained in parallel.
There is a drawback that a<-ab, which is one of the causes of snake behavior.

This invention provides a round axle box support device in which the overall length of the bogie structure is shortened, and the change in vertical relative distance between the bogie frame and the axle box caused by the deflection of the axle springs can be avoided in the longitudinal direction of the axle box. The purpose is to prevent displacement, and the *
The purpose is to simplify the configuration and eliminate all the drawbacks of conventional devices.

The embodiment will be explained with reference to FIGS. 2 and II3.

In FIG. 4, l denotes a truck frame, which is placed on an axle box 3 via an axle spring 2. The front of the axle box 3,
Alternatively, a support arm 4 extending toward the center of the truck is provided only on one of the rear sides, and its fulcrum position 1ii is provided.

is configured so as to be connected to a suitable position on the bogie frame L.

Above and below the fulcrum position 0 of the support arm 4, vertically symmetrical recesses 5 bent in an F-shape are provided, and a protection plate 6 is installed in the recess 5.
Rubber bent into an F-shape, covering the upper and lower surfaces with
The axle box support rubber 7 made of an elastic board made of synthetic resin or the like is placed in a vertically symmetrical arrangement in a single layer or in multiple layers and adjoins each other, and an upper support metal fitting 9 and a lower support metal fitting each having a convex portion 8 of the same shape are visible from both the upper and lower sides. 10, and both supporting metal fittings 9. It is fastened by two poles 11 passing through both sides of the lO, and an appropriate initial compressive force is applied to the axle box support rubber 7.

The upper support metal fitting 9 is provided integrally with the bogie frame l as shown in the figure, or is provided separately and fixedly attached. Engage the part with the trolley ゎ〈1 and fix it with bolts 13 or the like.

The axle box support rubber 7 is arranged so that its bent part is located above and below the fulcrum point MO, and the spring constant of the part 7& of the bent part on the axle box side is similar to that of the part 7b of the bogie center side. Formed so that it is larger than the spring constant. (See Figure 5) In Figure 11!5, in the relative displacement between the axle box 3 and the bogie frame l due to the deflection of the axle spring 2, the center of the axle box is 0.
is 0. If the support arm 4 is displaced to the position ', a compressive force is applied to the portion 7a of the axle box support rubber 70 above the fulcrum position of the support arm 4, and a compressive force is applied to the portion 7b of the axle box support rubber 7 below the fulcrum position. Each works.

Since the portion 7& has a larger spring rate than the portion 7b, the arc rotation of the support arm 4 is caused by the difference in spring constant between the portions 7a and 7b of the axle box support rubber 7. Move position 0 to σ by Δy.

That is, compared to the conventional device shown in Fig. 1, since the fulcrum position is displaced by Δy toward the axle box, the axle box 3 moves vertically at a displacement of Oa' from 0°, and therefore the front and rear axles are always kept parallel. Figure 6 shows the spring constant of part 7a of the axle box support rubber 7 and the spring constant of part 7b of 1.
In order to make it larger, the length 1□ of the support arm of part 7& in the 4 directions is made larger than the length a of part 7b in the same direction, and the volume of part & is made larger than the volume of part 7b. t
It is a figure explaining the said effect|action in the case.

Note that the material, size, shape effect, and mass effect of the upper and lower axle box support rubbers 7 are exactly the same.

When the support arm 4 is displaced from the solid line position to the imaginary line position,
The force P,,P, acting on the slope of the F-shaped recess 5 due to the elastic force of the axle box support rubber 7 is expressed by the relationship set to )k, where the parts 7 & and 7b are their spring constants. From, Pl>'1'
Becomes @. Therefore, the horizontal component force p1' is 11. This PI'1)I', which is larger than ', causes the fulcrum position 0 of the support arm 4 to be displaced by Δy to the σ position. More precisely, the horizontal force of the axial spring 2 and the spring rigidity in the ``direction'' also act as a force to displace the first fulcrum position 0 to the σ position, and the resultant force of these forces generates the displacement Δy.

In each of the above embodiments, the axle box support rubber 7 is formed into a plate-shaped body bent in an F-shape to form a one- to two-layer structure, but this is a multi-layer structure. It is also possible to change the thickness of the portion 71°7b,
It is also possible to change the spring constant kl by changing the stiffness of the parts 7m and 7b during molding and vulcanization.

The embodiment shown in Figure 7 shows the case where the axle box support rubber 7 is formed by dividing it into parts 7& and 71. Make the flattening Hs1 of 'a harder than the flattening Hs of part 7b・kl)k.

This is what I did at the time. In addition, in the illustrated example, the volumes v, , v of parts 7& and 7b are made equal, but in this case, the height of each part 7m and 7b is 11H
By making @I different, the volumes "*tv@" do not have to be equal, as long as the conditions are satisfied◎ In each of the above embodiments, the axle box support rubber 7 is made of one layer or It has a multi-layer structure, and the upper and lower support fittings 9 and 1o are fastened together with two bolts ll, and an initial clamping force is applied to the axle box support rubber 7, as shown in Figure 8. Supporting bracket 9.1
0 with one hole 15 passing through the hole 14 at the center and the fulcrum position of the support arm 4, and tighten the axle box support rubber 7.
The structure may be such that the initial clamping force is applied to the first clamping force, and in this way, the number of parts of the device can be reduced.

As described above, the present invention provides an axle box support device with an extremely simple configuration and no sliding parts, and facilitates maintenance.
In addition, with respect to the relative vertical displacement between the bogie frame and axle box, the front and rear axles are prevented by eliminating longitudinal displacement of the axle box with respect to the bogie frame. By always supporting the vehicle in parallel, it completely eliminates one of the major causes of meandering motion when the vehicle is running at high speed, and also absorbs vibrations in the left and right direction of the vehicle at the fulcrum part of the support arm, greatly improving riding comfort in high-speed vehicles. It can be attached to the bag.

In addition, since this invention provides support arms only on either the front or the rear of the axle box, the overall length of the truck can be greatly reduced, which increases the installation space for the underfloor equipment of the vehicle. Its maintenance, management, etc. become convenient and easy.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the operation of the conventional lid, Fig. 11!2 is a partially longitudinal side view showing the main parts of the embodiment, Fig. 3 is Fig. 1g2 - III
Fig. 4 is a bottom view taken from line F/-F/ in Fig. 11!2, Fig. 5 and Fig. 6 are side views explaining the invention in detail, and Fig. 7 shows another implementation. FIG. 8 is a vertical cross-sectional view showing a main part of another embodiment corresponding to FIG. 3. FIG.

Claims (8)

[Claims] (1) The axle box that supports the bogie frame via an axle spring and the bogie frame are connected by support arms provided only on either the front or rear of the axle box, and the relative relationship between the axle box and the bogie frame is The support arm, which rotates in an arc due to vertical displacement, is bent in an F-shape above and below the fulcrum position connected to the bogie frame at the fulcrum position, and the spring constant on the axle box side from the bent part is larger than the spring constant on the bogie center side. Arrange the set axle box support rubber 4 vertically symmetrically,
The fulcrum position of the support arm and the axle box support rubber above and below the support arm are sandwiched and supported between an upper support metal fitting and a lower support metal fitting provided on the truck frame, and an initial clamping force is applied to the support rubber. Railroad vehicle axle box support device (2) The railway vehicle according to claim (1), wherein each of the axle box support rubbers bent upward and downward in a F-shape to vertically symmetrically distribute power is connected to the side body at the bending portion. Axle box support device (3) A railway vehicle according to claim (1), wherein each of the axle box support rubbers bent upward and downward in a F-shape and arranged vertically symmetrically is separated into separate bodies at the bending part. Axle box support device (4) The support arm is recited in any one of claims (1) to (3), in which axle box support rubber is bent upward and downward in an F-shape and arranged symmetrically in a layered manner. Axle box support device for railway vehicles (5) Claims (1) to (4) in which the volume of the axle box side from the bending point of the axle box support rubber bent in an F-shape and arranged vertically symmetrically is larger than the volume of each side of the bogie. ) The axle box support device for a railway vehicle described in any one of (6) Claims (1) to (4) in which the axle box supporting rubber is bent in an F-shape and arranged vertically symmetrically, and the deflection on the axle box side from the bending point is made harder than the deflection on the center side of the bogie. t
The axle box support device for a railway vehicle according to any one of (7) At least two upper and lower support metal fittings placed on both sides of the upper and lower support metal fittings that sandwich the fulcrum position of the support arm and the axle box support rubber above and below it and apply initial clamping force to the support rubber. The axle box support device for a railway vehicle according to any one of claims (1) to (6) M, which is fastened with a bolt. (8) Upper and lower support fittings that sandwich the fulcrum position of the support arm and the axle box support rubber above and below it and apply initial clamping force to the support rubber are fastened with a single bolt passing through the center. An axle box support device for a railway vehicle according to any one of claims (1) to (6).