JP2000203423A - Structural body for high-speed rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the bending rigidity in the longitudinal direction of the structural body of a cross beam, to reduce the amplification ratio of a vibration transfer path and to reduce the upper floor vibration and indoor noise caused by the operation of underfloor apparatuses by fitting reinforcing members arranged along the longitudinal direction of an underframe between adjacent cross beams to the side beams suspending the underfloor apparatuses. SOLUTION: In a vehicle structural body 1 provided with underfloor apparatuses (an intake device 6, an exhaust device 7, a ventilation device, an air conditioner, a main transformer or the like) 5, two reinforcing members 4 are arranged in parallel along the longitudinal direction of the vehicle structural body 1 to two cross beams 3 constituting an underframe suspending the underfloor apparatuses 5. Two adjacent cross beams 3 are connected by two reinforcing members 4, and the bending rigidity of the cross beams 3 vibrated in parallel to the longitudinal direction of the vehicle structural body 1 is improved. The vibration in the rail direction of the cross beams 3 caused by the vibration of the underfloor apparatuses 5 provided on the vehicle structural body 1 is suppressed, and indoor noise is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for a railway vehicle, and more particularly to a structure for a railway vehicle provided with an underframe composed of side beams and cross beams.

[0002]

2. Description of the Related Art Conventionally, as means for suppressing vibration of a ventilation device (air supply device, exhaust device), a ventilation device (air supply device,
Exhaust device) to support the motor in vibration isolation inside the casing, implement high-precision dynamic balancing of the impeller, or
(Ventilation device (air supply device, exhaust device) side), such as adopting anti-vibration support at the fastening part between the (air supply device, exhaust device) and the vehicle structure. However, there is a concern that the above-described highly precise dynamic balance adjustment of the impeller may increase the number of production processes.

[0003] Japanese Patent No. 2626282 is an example of this type of ventilator.

[0004]

An air supply device, an exhaust device, and a ventilating device incorporating them are provided with energy to a working fluid by rotating an impeller by an electric motor to blow fresh air into the vehicle. Or exhausting exhaust air from inside the vehicle to outside the vehicle. Therefore, since the ventilation device (air supply device, exhaust device) is composed of the electric motor and the rotating part (the impeller), due to the unbalance of the rotating part, the two in the axial direction of the electric motor and in a plane perpendicular to the electric motor axis are formed. Vibrates in a total of three directions. Conventionally, an electric motor is anti-vibration supported inside a housing of an air supply device, an exhaust device, and a ventilation device, or a rotating body (impeller).
Measures such as implementing high-precision dynamic balancing.

[0005] On the other hand, the cross beams constituting the underframe of the vehicle structure are:
When equipped with the ventilation device (air supply device, exhaust device), it is difficult to vibrate against the vertical bending (vertical direction) and the longitudinal direction (sleeper direction) of the cross beam, but on the other hand, the longitudinal direction of the cross beam
With respect to the vibration caused by the bending in the (rail direction), the bending rigidity of the cross beam in this direction was small and the structure was easy to vibrate. By the vibration accompanying the operation of the ventilation device (air supply device, exhaust device),
If the cross beam vibrates in the longitudinal direction of the vehicle structure (rail direction),
The vibration propagates through the joists and eventually causes the upper floor to vibrate vertically. Vertical vibration of the upper floor not only gives passengers discomfort, but also increases the noise inside the vehicle, which is not preferable.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the response magnification of a vibration propagation path without increasing the mass of a cross beam, and to comprehensively operate underfloor equipment such as a ventilation device (air supply device, exhaust device). The purpose of the present invention is to reduce upper floor vibration and vehicle interior noise.

[0007]

SUMMARY OF THE INVENTION An upper floor vibration and an in-vehicle noise associated with the operation of an underfloor device such as an air supply device, an exhaust device, a ventilation device, a main conversion device, and a main transformer which are suspended from an underframe are reduced. As a method, the following means can be considered.

[0008] It is an object of the present invention to provide a structural member of a cross beam by attaching a reinforcing member disposed along the longitudinal direction of an underframe between a cross beam suspending the underfloor equipment and a cross beam adjacent to the cross beam. This is achieved by increasing the bending stiffness of the vibration transmission path and reducing the response magnification of the vibration transmission path.

An object of the present invention is to provide a mounting method for mounting the reinforcing member by using an existing hole of a cross beam.

[0010] An object of the present invention is to mount the motor shaft, which is a rotating means of the ventilation device, the air supply device, the exhaust device, or the like, on a vehicle structure so as to be parallel to a horizontal beam constituting the vehicle structure. Accordingly, the vibration of the vehicle structure caused by the vibration accompanying the driving of the rotating means can be suppressed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows an embodiment according to the present invention. The figure shows a vehicle structure 1 having underfloor equipment (ventilation device 5, air supply device 6, exhaust device 7, air conditioner 18, main converter, main transformer, main motor cooling blower, etc.) viewed from obliquely below. It is a figure showing a state. A reinforcing member (4) is provided along two longitudinal beams (3) constituting an underframe for suspending the underfloor equipment along the longitudinal direction of the vehicle structure (1), and preferably parallel to the side beams (2). It is a thing. Since the two cross beams 3 adjacent to each other are fastened by the two reinforcing members 4, the bending rigidity of the cross beams 3 vibrating parallel to the longitudinal direction (hereinafter, rail direction) of the vehicle structure 1 can be improved.
Accordingly, the underfloor equipment included in the vehicle structure 1, for example, the ventilation device 5, the air conditioner, the main motor cooling fan drive motor (M
MBM), the main transformer, the main converter, and the like, can suppress the rail-direction vibration of the cross beam 3 due to the vibration.

FIG. 2 shows another embodiment according to the present invention.
FIG. 2 shows a case where the above-described reinforcing member 4 is used as one sheet.
When the reinforcing member 4 is attached to the cross beam 3 constituting the underframe by welding, the fatigue strength of the cross beam 3 may be reduced by welding. In order to prevent this reduction in fatigue strength, the reinforcing member 4
Is set to one, and vibration of the cross beam 3 in the rail direction is suppressed.

FIGS. 3 and 4 show conventional under-floor equipment for the vehicle structure 1, for example, a ventilation device 5, an air supply device 6, an exhaust device 7, and the like.
The mounting state of the air conditioner 18, the main converter, the main transformer, and the like is shown. Generally, the main motor such as the ventilation device 5 and the impeller 11
The device composed of the rotating system (the impeller 11)
And the like, and fluctuations in the pressure of the air passing through the impeller 11, vibrations are generated in three directions (rail direction, sleeper direction, vertical direction). In addition, the main converter, main transformer, etc. are also affected by internal electromagnetic vibration, vibration of cooling fan, etc.
Vibration occurs in three directions (rail direction, sleeper direction, vertical direction). Generally, since the bending rigidity in the vertical direction of the cross beam 3 is high,
It is difficult to vibrate in the vertical direction of the cross beam 3. However, since the bending rigidity of the cross beam 3 in the rail direction is small, the cross beam 3 is
It is easy to vibrate in the rail direction (longitudinal direction of the vehicle structure 1) with the joint portion with the support as a fulcrum. Vibration in the rail direction of the cross beam 3 is transmitted to the joist 9 that is perpendicular to the cross beam 3 via the airtight floor 10.
Since the joist 9 is laid in parallel with the longitudinal direction of the vehicle structure 1, when the cross beam 3 vibrates around the joint via the airtight floor 10, the vibration of the joist 9 induces a vertical vibration component. The vertical vibration of the joist 9 causes the upper floor 8 to vibrate in the vertical direction as it is. As a result, the upper floor 8 vibrates, so that the noise in the vehicle is easily increased.

FIGS. 5 and 6 show another embodiment according to the present invention. A method of fixing the reinforcing member 4 to the cross beam 3 provided for damping the vibration of the cross beam 3 in the rail direction will be described.
When fixing the reinforcing member 4 to the cross beam 3, the cross beam 3 is provided with a hole in the longitudinal direction of the cross beam 3 to reduce the weight. This cross beam 3
The bolts for fixing the reinforcing member 4 to the cross beam 3 are fixed through the holes. This method not only eliminates the need for processing the cross beam 3 at all, but also eliminates the need to weld the reinforcing member 4 to the cross beam 3. Since the cross beam 3 is a structural member of the vehicle structure 1,
A decrease in fatigue strength due to welding can be prevented. In order to effectively increase the bending rigidity of the cross beam 3 in the rail direction, the height h of the reinforcing member 4 is set to be substantially the same as the height H of a portion of the cross beam 3 where a hole is formed. In addition, a hole is provided at the center in the width direction of the reinforcing member 4 in order to reduce the weight and to pass under-floor wiring and the like installed parallel to the cross beam 3 along the longitudinal direction.

FIG. 7 shows another embodiment according to the present invention.
In order to enhance the workability when fixing the reinforcing member 4 to the cross beam 3, the length L1 of the reinforcing member 4 is made smaller than the interval L2 between the cross beams 3, and the fixing is performed by bolting together with a spacer between the fixing members. It is. Accordingly, when the reinforcing member 4 is mounted at a predetermined position, interference with the cross beam 3 is reduced, and the fixing work is facilitated.

FIG. 8 shows another embodiment according to the present invention.
In the present embodiment, instead of fastening the front and rear two cross beams 3 with the reinforcement member 4, both sides of the cross beam 3 are reinforced by short reinforcement members 4X. Thereby, the bending rigidity of the cross beam 3 in the rail direction can be increased, and the vibration can be suppressed. FIG.
In the structure shown in FIG.
When the underfloor wiring runs in parallel to the above, or when the upper protrusion of the underfloor equipment is located in a space surrounded by the cross beam 3 and the airtight floor 10, the reinforcing member 4 becomes an obstacle. In such a case,
With the structure as shown in FIG. 8, it is possible to avoid interference between the above-described reinforcing member 4 </ b> X and the underfloor wiring or the protrusion of the underfloor equipment. Further, since the area of the reinforcing member 4X can be reduced, there is an advantage that the vehicle weight is not increased so much. In addition, when this reinforcing member 4X is attached to the vehicle structure 1, if it is provided along the joist 9, a higher damping effect can be obtained.

FIGS. 9, 10 and 11 show an example of the reinforcing member 4. FIG. As shown in the top view of FIG. 9, the reinforcing member 4 is composed of a plate 4-a that is bolted to the cross beam 3 and a member 4-b that connects the two plates described above. Board 4-a
A plurality of through holes for fixing bolts to the cross beam 3 are formed, and the interval between the bolt through holes is substantially the same as the interval between the holes provided in the cross beam 3. Thereby, the reinforcing member 4 can be fixed to the cross beam 3 using the hole of the cross beam 3.

FIGS. 12, 13 and 14 show other examples of the reinforcing member 4. FIG. In order to increase the bending rigidity of the reinforcing member 4, A
-A section is I-shaped. Thereby, the bending rigidity of the reinforcing member 4 is increased, so that the vibration of the reinforcing member 4 itself can be reduced.

FIGS. 15, 16 and 17 show an example of the reinforcing member 4. FIG. Triangular reinforcement is added to a joint between a member fastened to the cross beam 3 by bolts and a member connecting the members. These also improve the bending rigidity of the reinforcing member 4 and suppress the vibration of the reinforcing member 4 as described above.

FIGS. 18 and 19 show examples of attaching the reinforcing member 4 to the vehicle structure 1. FIG. Usually, the underfloor equipment includes a plurality of cross beams 3
Be suspended. For example, as shown in FIG.
Is suspended on the two cross beams 3, and the air conditioner 18 is suspended on the four cross beams 3. In order to suppress the vibration in the rail direction of the cross beam 3 due to the vibration of the ventilation device 5 and the air conditioner 18,
The reinforcing members 4 are arranged in a staggered manner. FIG. 19 shows how the staggered arrangement of the reinforcing members 4 effectively suppresses the vibration of the cross beam 3 in the rail direction (schematic diagram). It is assumed that the vibration of the cross beam 3 in the rail direction is a primary to tertiary vibration mode as shown in the figure. The reinforcing member 4-1 suppresses the primary and tertiary vibration modes, and the reinforcing member 4-2 and the reinforcing member 4-3 suppress the secondary and tertiary vibration modes. Therefore, as shown in FIG. 19, by arranging the reinforcing members 4 in a staggered manner, it is possible to effectively suppress the rail beam vibration of the cross beam 3 due to the underfloor equipment.

FIG. 20 shows another embodiment according to the present invention. This figure is a front view (cross section of the vehicle structure 1) of the cross beam 3 that suspends the ventilation device 5. The unbalance amount of the impeller 11, which is the rotating body of the ventilation device 5, is reduced to a predetermined unbalance amount by dynamic balance adjustment. For this reason, vibration components in the rail direction (perpendicular to the paper surface) and in the vertical direction are small. Further, the ventilation device 5 includes
Is connected to the cross beam 3 through the
The vertical vibration of the (air supply device 6, exhaust device 7) is not easily transmitted to the vehicle structure 1. However, the vibration of the ventilation device 5 in the sleeper direction (the axial direction of the electric motor 12) causes the impeller 11 to receive the excitation force due to the difference between the intake pressure and the exhaust pressure of the ventilator 5, Since the pressure itself fluctuates, it is easy to vibrate. By arranging the thrust direction of the electric motor of the ventilation device 5 (the air supply device 6 and the exhaust device 7) in parallel to the cross beam 3 constituting the vehicle structure 1, vibration is less likely to be transmitted to the vehicle structure 1. Unlike the vibration in the rail direction, which will be described later, the vibration in the longitudinal direction of the cross beam 3 is unlikely to promote the vertical vibration of the upper floor, which increases the noise in the vehicle. Further, in this figure, a reinforcing member 4 for suppressing the vibration of the cross beam 3 in the rail direction is provided in parallel along a joist 9 constituting the vehicle. Thereby, further improvement in bending rigidity for suppressing rail-direction vibration of the cross beam 3 can be expected.

FIG. 21 is a schematic view showing the vehicle structure 1 provided with the air supply device 6 or the exhaust device 7 having the impeller 11 only on one shaft of the electric motor 12. It is considered that the air supply device 6 or the exhaust device 7 also has a large vibration in the axial direction (thrust direction) of the motor for the same reason as the ventilation device 5 having the impeller 11 on both shafts of the motor 12 described above. Therefore, the thrust direction of the motor 12 having large vibration is mounted parallel to the cross beam 3 constituting the vehicle structure 1. Also in this figure, a reinforcing member 4 for suppressing the vibration of the cross beam 3 in the rail direction is provided along the joist 9.

[0024]

According to the present invention, of the plurality of cross beams forming the underframe, a reinforcing member extending along the longitudinal direction of the underframe is attached to the cross beam that suspends the underfloor equipment, between the adjacent cross beams. Thus, it is possible to prevent the vibration of the underfloor equipment from propagating into the vehicle structure.

According to the present invention, by installing a reinforcing member for suppressing horizontal vibration of the cross beam suspending the underfloor equipment among the cross beams forming the underframe, the vehicle structure caused by the vibration of the underfloor equipment is installed. Vibration can be prevented.

[Brief description of the drawings]

FIG. 1 is a lower perspective view showing a state where underfloor equipment is attached to a vehicle structure according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where an underfloor device is attached to a vehicle structure according to another embodiment of the present invention.

FIG. 3 is a schematic diagram showing a state in which underfloor equipment is attached to a conventional vehicle structure 1.

FIG. 4 is a schematic diagram showing a state of vibration accompanying operation of the underfloor equipment of FIG. 3;

FIG. 5 is a front view showing a structure for attaching a reinforcing member to a cross beam in the embodiment of the present invention.

FIG. 6 is a side view showing a structure for attaching a reinforcing member to a cross beam in the embodiment of the present invention.

FIG. 7 is a side view showing an installation state of reinforcing members and underfloor equipment in another embodiment of the vehicle structure according to the present invention.

FIG. 8 is a side view showing an installation state of reinforcing members and underfloor equipment in another embodiment of the vehicle structure according to the present invention.

FIG. 9 is a plan view showing a reinforcing member according to the embodiment of the present invention.

FIG. 10 is a front view of the reinforcing member shown in FIG.

FIG. 11 is a side view of the reinforcing member shown in FIG.

FIG. 12 is a plan view showing a reinforcing member according to another embodiment of the present invention.

FIG. 13 is a front view of the reinforcing member shown in FIG.

FIG. 14 is a side view of the reinforcing member shown in FIG.

FIG. 15 is a plan view showing a reinforcing member according to another embodiment of the present invention.

FIG. 16 is a front view of the reinforcing member shown in FIG.

FIG. 17 is a side view of the reinforcing member shown in FIG.

FIG. 18 is a plan view showing a state in which a reinforcing member is installed on a vehicle structure according to the present invention and underfloor equipment is installed.

FIG. 19 is a schematic view showing a state where the reinforcing member of the embodiment of the present invention suppresses vibration of the cross beam.

FIG. 20 is a side view showing the state of attachment of the reinforcing member and the ventilation device to the cross beam in the embodiment of the present invention.

FIG. 21 is a side view showing a state where the reinforcing member, the air supply device, and the exhaust device are attached to the cross beam in the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle structure, 2 ... Side beam, 3 ... Side beam, 4 ... Reinforcement member, 5
... ventilator, 6 ... air supply, 7 ... exhaust, 8 ... upper floor,
9 ... joist, 10 ... airtight floor.

Claims (5)

[Claims] In a railway vehicle structure provided with an underframe composed of side beams and cross beams, said cross beam suspending underfloor equipment is disposed along a longitudinal direction of said underframe. A railway vehicle structure comprising a reinforcing member for fastening a cross beam adjacent to the cross beam. 2. The railway vehicle structure according to claim 1, further comprising a reinforcing member for connecting the plurality of cross beams for suspending the underfloor equipment and cross beams before and after the plurality of cross beams. 3. The railcar structure according to claim 1, wherein the cross beam is provided with a hole, and the reinforcing member is fixed to the cross beam by a fastening member penetrating the hole of the cross beam. Features a railway vehicle structure. 4. A railway vehicle provided with underfloor equipment having rotating means, wherein the rotating shaft of said rotating means is arranged along the longitudinal direction of a beam for suspending the underfloor equipment. 5. A railway vehicle structure having an underframe composed of side beams and cross beams, wherein the cross beams of the underframe suspend underfloor equipment, and are reinforced to suppress horizontal deformation of the cross beams. A structure for a railway vehicle, comprising a member.