JPH04122274U - Railroad vehicle axle box support device - Google Patents

Abstract

(57) [Summary] [Purpose] In railway vehicles, the axle box that supports the axle is
This invention relates to a device that supports a bogie frame. [Structure] The axle box, which is fixed to the bogie frame with an adjustment plate, has an overhanging part that is higher on the outside of the bogie frame and lower on the inside of the bogie frame, in accordance with the shape of the bogie frame, in front and back with respect to the traveling direction of the vehicle. is formed along the bogie frame, and an inner cylinder is inserted and fixed into the center hole of the laminated rubber that is press-fitted into these overhanging parts.
It is fixed to the bogie frame via a height adjustment plate.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea supports the axle box that supports the axle against the bogie frame in railway vehicles. This relates to a proposal for a device that allows

0002

[Conventional technology]

Conventionally, as shown in FIG. 4, for example, an adjustment plate was installed from below between the axle box a and the bogie frame b. c, vibration isolating rubber d, shaft spring seat e, and coil spring f, from the shaft box a to the Along the front and back direction of the bogie frame b, there are projecting parts g and k that protrude almost horizontally. The rubber laminations i and j are attached to the center holes k and l of the rubber laminations i and j. A structure is provided in which inner cylinders m and n attached to the lower surface of frame b are inserted and fixed.

0003 In the above configuration, since the coil spring f enters above the axle box a, this part The cross-sectional torsional rigidity of the inner cylinder m, The left and right load Q acting in the left and right direction of n, and especially acting on the inner cylinder m on the outside of the bogie frame b, is , an excessive torsional stress P (Fig. 6), and this torsional stress P is applied to the left and right load Q and the point of action O of the left and right load Q. ₁ from the shear center O of the cross section of the bogie frame b₂The product of the distance l, that is, proportional to Q・l do.

0004

[Problem that the idea aims to solve]

In such a conventional structure, the laminated rubber i and j are arranged almost horizontally, The center height of the rubber installation is set at approximately the height of the center of the axle when a passenger is on board. , as mentioned above, this design generates excessive torsional stress on the bogie frame b. This is an attempt to improve.

[0005]

[Means to solve the problem]

In other words, this idea installs an adjustment plate and a barrier from below between the axle box and the bogie frame as described above. In an axle box support device comprising a swinging rubber, an axle spring base, and a coil spring, the above-mentioned Adjust the axle box to the outside of the bogie frame in front and back in the direction of vehicle travel, according to the shape of the bogie frame. An overhang is formed along the bogie frame with a high part and a low part towards the inside of the bogie frame. Laminated rubber is inserted into the protruding part and fixed to the bottom of the bogie frame via a height adjustment plate. An axle box support device for a railway vehicle, comprising an inner cylinder inserted and fixed into the center hole of each of the laminated rubber layers. This is what we propose.

[0006]

[Effect]

In the above-mentioned device of this invention, the spring height can be adjusted according to the difference in the weight of various vehicles. , increase the thickness of the adjustment plate directly above the axle box and the height adjustment plate between the inner cylinder and the bogie frame by the same amount. The spring height is adjusted by adjusting the height of the vehicle as it is (with the vehicle body mounted). The bolt was screwed into the threaded part of the anti-vibration rubber from the top of the bogie frame. Therefore, an adjustment plate is inserted between the vibration isolating rubber and the axle box.

[0007]

【Example】

Next, this invention will be explained in detail with reference to embodiments shown in FIGS. 1 to 3. First, in FIGS. 1 and 2, 1 is an axle box, and this axle box 1 and a trolley with a gate-shaped cross section Between the frame 2 and the 6 is interposed.

[0008] The bogie frame is configured such that the axle box 1 has a high outer side at the front and rear in the vehicle traveling direction. 2, the outer side of the bogie frame 2 is made higher and the inner side of the bogie frame 2 is lowered. Projecting parts 7 and 8 are formed along the bogie frame 2.

[0009] The overhangs 7 and 8 are provided with spring constants that are different in the traveling direction of the vehicle and in the left and right directions of the vehicle. Insert the laminated rubber 9 and 10, and for safety, insert the presser feet 11 and 12. Efforts are made to prevent these laminated rubbers 9 and 10 from escaping.

0010 On the other hand, at the bottom of the bogie frame 2, there is a height adjustment section directly above the laminated rubber 9, 10. Inner cylinders 15 and 16 are fixed with bolts 17 and 18 via straightening plates 13 and 14, and this At the same time, these inner cylinders 15 and 16 are fitted with precision holes 19 and 20 drilled in the bogie frame 2. They fit together well, and the fixed wheelbase of the bogie, the bearing left and right spacing, and the bearing diagonal dimensions are accurate. I'm keeping it.

[0011] The inner cylinders 15, 16 are inserted into the center holes 21, 22 of the laminated rubber 9, 10. , with nuts 27 and 28 via spacers 23 and 24 and hanging fittings 25 and 26, respectively. Fixed.

0012 Adjustment of the spring height due to differences in vehicle weight is possible using the adjustment plate 3 and height adjustment plates 13 and 1. This is done by increasing or decreasing the thickness of 4 by the same amount.

[0013] In the above configuration, the laminated rubber 9 on the outside of the bogie frame 2 is placed as high as possible. By placing the The position is raised by H (see Figure 3) from the axle center, and the torsion motor acting on the cross section ment can be kept to a minimum.

[0014] The laminated rubber 10 and inner cylinder 16 on the inner side of the bogie frame 2 are different from those on the outer side of the bogie frame 2. By installing the bearing lower than the center of the axle by the same amount (H) as the height of the bearing, There is no generation of torsional moments around the front and rear axes that reduce service life.

[0015] Next, by arranging the laminated rubber in steps, the rotational rigidity in the pitching direction of the axle box is improved. It is possible to suppress the high-frequency vibrations of the car body caused by the pitch movement of the axle box. Explain why.

[0016] Now, when the axle box is rotated by △θ around the center of the shaft, the rotational force T that restores the axle box to its original state is, if the laminated rubber is arranged horizontally as shown in Figure 5, T = k ₁ · Since △H・2D=k ₁・D・△θ・2D, and the axle box pitch rigidity GPH is T=GPH・△θ, (k ₁ is the elastic force in the vertical direction of the laminated rubber, and k ₂ is (represents elastic force in the horizontal direction) GPH=T/Δθ=2k ₁ D ² .

[0017] On the other hand, if the laminated rubber is arranged in steps as shown in Figure 3, T=k₁・l△θ・D/l・2D+k₂・l・△θH/l・2H =k₁・△θ・2D²+k₂・△θ・2H² =2(k₁D+k₂H²)△θ Axle box pitch rigidity GPS T=GPS・△θ GPS=T/△θ=2(k₁D²+k₂H²) Then, GPS=GPH+2k₂H² In other words, GPS is 2k more than GPH.₂・H²only becomes larger.

[0018]

[Effect of the idea]

According to the above, the device with the above structure of this invention can be used for different vehicle weights. The height of the spring can be adjusted using the adjustment plate on the axle box and the inner part press-fitted into the laminated rubber of the overhang. This can be easily done by increasing or decreasing the thickness by the same amount using the height adjustment plate between the cylinder and the bogie frame. At the same time, by placing the laminated rubber near the outside of the bogie frame in a high position, torsion is reduced. - It has the effect of being able to suppress the amount of ment.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of the device of the present invention.

FIG. 2 is a plan view of the portion shown in FIG. 1;

FIG. 3 is an explanatory diagram showing the operation of the device of this invention.

FIG. 4 is a partially cross-sectional side view showing an example of a conventional device.

FIG. 5 is an explanatory diagram of a conventional device corresponding to FIG. 3;

FIG. 6 is an enlarged sectional view taken along line AA in FIG. 5;

[Explanation of symbols]

1 axle box 2 Bogie frame 3 Adjustment plate 4 Anti-vibration rubber 5 Under the shaft spring seat 6 Coil spring 7,8 Overhang 9,10 Laminated rubber 13,14 Height adjustment plate 15,16 Inner cylinder 21, 22 Center hole

Claims (1)

[Scope of utility model registration request] [Claim 1] An adjustment plate is installed from below between the axle box and the bogie frame.
In an axle box support device that includes anti-vibration rubber, an axle spring seat bottom, and a coil spring, the axle box is placed front and rear with respect to the traveling direction of the vehicle, with the outer side of the bogie frame being higher and the outer side of the bogie frame being higher, in accordance with the shape of the bogie frame. An inner cylinder is formed by forming a protruding part with a lower inner part along the bogie frame, inserting laminated rubber into these protruding parts, and fixing it to the lower part of the bogie frame via a height adjustment plate.
An axle box support device for a railway vehicle, which is inserted and fixed into the center hole of each of the laminated rubbers.