JPH0425414Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a snow cover suitable for an air spring mounted on a bolsterless type bogie of a railway vehicle, and is particularly concerned with a snow cover that is The aim is to provide a snow cover that can easily be adapted to other areas.

[Conventional technology]

Conventionally, air springs used in railway vehicles in regions with heavy snowfall have been protected by providing an elastomer cover of uniform thickness around the outer periphery of the diaphragm to prevent snow and ice from entering. However, in order to reduce weight and ease of maintenance, vehicle bogies have changed from swing-hanging type → direct mount type → indirect mount type, etc., from bogies with Bolsters to Bolster-less bogies. It is used due to its characteristics. The air spring attached to the bolster truck has a horizontal displacement of ±
The displacement is approximately 30 to ±40 mm, but in the case of an air spring for a bolsterless truck, the displacement is approximately ±100 mm in the horizontal direction. However, at present, the snow-proof cover system for the air spring of the conventional bolster-type truck is used as the snow-proof cover for the air spring of the current bolster-less truck.

[Problem that the invention attempts to solve]

As mentioned above, the air spring attached to the bolster type truck has a small horizontal displacement, so it has been used without any problems even with the conventional snow cover structure. However, this conventional snow cover structure can be
If used on an air spring attached to a bolsterless vehicle that operates close to 100 mm, the snow cover may deform significantly, causing abnormal shapes such as forming dents, causing contact wear with the air spring's diaphragm, which may lead to a puncture. It had the following characteristics.

In other words, when an air spring installed between a bolsterless bogie and the car body passes through a curve on a track or a switch, the lower and upper surfaces of the air spring not only move in the horizontal direction, but also twist. As a result, the snow cover becomes shaped like a towel being wrung out, and the volume between the air spring's diaphragm and the snow cover decreases, increasing the pressure, causing pressure to rise from either the upper or lower end of the snow cover installation. Or, even if the air escapes and the car body returns to its normal position, depending on the degree of fit, the snow cover will not be able to suck in the air and the snow cover will become dented. If the snow cover is dented,
Even simple vertical vibration of the air spring carries the risk of coming into contact with the diaphragm and causing premature wear.

As mentioned above, using a conventional snow cover for an air spring attached to a bolsterless truck will lead to failures such as wear and punctures.

Therefore, we have developed an adaptive function that can eliminate the causes of defects such as friction of the air spring due to the occurrence of abnormal forms such as dents in the snow cover, folds and twists of large irregularities due to large displacement of the air spring attached to the bolsterless truck. It is necessary to devise a structure for the snow cover that will provide the desired effect.

[Means for solving problems]

In trying to solve the above problem, the inventors concluded through trials that the defect could be resolved by combining the following three conditions (a), (b), and (c). It is something.

In other words, (a) In order to prevent dents, uneven folds, twists, etc. from easily occurring on the outer circumferential side surface of the snow cover, a uniform thin wall thickness is inappropriate, and an unbalanced portion of wall thickness must be provided. For this purpose, such an unbalanced structure can be obtained by providing a plurality of ribs at regular intervals on the outer circumferential side surface.

That is, by providing a plurality of ribs on the outer circumferential side surface of the snow cover, the membrane rigidity is increased and the occurrence of dents, folds, and twists is prevented. Note that the ribs may be set in the vertical direction (axial direction) or in the vertical and horizontal directions. In the case of vertical and horizontal direction settings, the vertical direction may be used as the main part, and the horizontal direction may be provided as an auxiliary rib with a small width.

(b) Provide multiple holes for air circulation at the bottom of the outer peripheral side of the snow cover. Even if the air inside the snow cover momentarily escapes due to large horizontal displacement or twisting of the upper and lower surfaces when passing through a curve in the track or a switch, the air can be sucked in immediately. ) Conditions can be rapidly restored in combination with the rib configuration. Furthermore, even if powder snow, rainwater, water from melting snow, etc. enters the snow cover during driving in cold regions, it can be easily discharged to the outside without accumulating inside.

(c) The bottom surface of the snow cover shall have zigzag folds without ribs. This is made thinner than the ribs on the outer peripheral side surface, so that even if the snow cover and the air spring diaphragm come into contact when passing around a curve or a switch, the contact pressure is reduced and wear is prevented. It's for a reason.

By combining the above three conditions, it has been possible to construct a durable snow protection cover that eliminates the conventional defects and provides suitable effects. Note that the snow cover made of elastomer may be reinforced with elastic fibers or the like having high elasticity.

[Effect]

This snow cover is constructed by a combination of the three conditions (a), (b), and (c) above, so even if it is used for the air spring of a bolsterless truck, it will not have dents, uneven folds, or twists. It is suppressed so that it does not easily occur, has a rapid restoring action against deformation, and even in contact with large horizontal displacements of the air spring.
It maintains the effect of reducing the contact pressure between the snow cover and the diaphragm of the air spring.

〔Example〕

Next, the configuration of this invention will be specifically explained based on the drawings of the embodiment.

Fig. 1 is a 1/2 plan view of a snow cover showing an example of this invention, Fig. 2 is a sectional view taken along the line A-A, and Fig. 3 is a sectional view showing an example of setting a snow cover on an air spring. It is.

In the figure, SBC is a bowl-shaped snow cover, 1 is a flexible membrane constituting the snow cover, and this example shows an example of a thickness of 3 mm. 2 is a plurality of ribs set on the outer peripheral side surface, in this example, the thickness is 3 mm x width 20
This shows an example in which 12 mm ribs are set at equal intervals in the vertical direction. 3 is a zigzag-shaped fold formed on the bottom surface between the lower mounting end and the outer peripheral side surface;
5 is a plurality of holes set at the lower part of the outer circumferential side surface through which air can circulate, and in this example, holes of 10 mmφ are arranged evenly at eight locations on the circumference, and 5 is the upper mounting end. , 6 is the lower end of the attachment.

Figure 3 shows the assembled state of the snow cover SBC in cross section, where AS is an air spring, 7 is the top plate of the air spring, 8 is the upper bead seat of the air spring, 9 is the lower bead seat, Reference numeral 10 denotes a bead portion of the air spring, which is airtightly fixed to the upper and lower bead sheets. Reference numeral 11 denotes a stopper provided at the bottom of the air spring, in which the lower end 6 of the snow cover SBC is attached, and the upper end 5 of the snow cover SBC is fixed to the upper end of the top plate of the air spring. This shows the state set outside the air spring AS.

[Effects of the invention] Since the snow cover of this invention has the functions mentioned in the function section above, it can instantly adapt to any fluctuations in the air springs attached to the bolsterless truck, thereby reducing wear and tear. , which exhibits a durable covering effect suitable for a long period of time without fear of damage.

[Brief explanation of drawings]

Figure 1 is a 1/2 plan view showing an example of the snow cover for the bolsterless air spring of this invention, and Figure 2 is a
FIG. 3 is a cross-sectional view taken along the line A-A of the same, and is a cross-sectional view showing an example of setting a snow cover on the air spring. SBC... Snow cover, 1... Flexible membrane, 2...
...Rib, 3... Zigzag folds, 4... Hole,
AS...Air spring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A snow cover formed from a bowl-shaped flexible membrane set on the outside of an air spring for protection of an air spring mounted on a bogie of a vehicle. The outer periphery side has multiple reinforcing ribs at equal intervals, and the bottom has zigzag folds that are easy to expand and contract without ribs. An air spring snow cover characterized by forming a plurality of holes for circulation. (2) The snow cover for an air spring according to claim 1, wherein a plurality of equally spaced reinforcing ribs are set in the vertical direction or in both the vertical and horizontal directions.