JP2017030422A - On-vehicle instrument of railway vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the rotational oscillation of an electric instrument for railway vehicle in a pitch or rolling direction excited by oscillation of a vehicle body, and to prevent noise generation resulting from accelerated degradation of an elastic body and oscillation in the electric instrument suspended to the railway vehicle or a box body installed to the railway vehicle for internally equipping the instrument.SOLUTION: An electric instrument 12 installing a support member 13 angled at an optional angle θ, and a support member 14 installed to a box body 2 are installed inside the box body via an elastic support body 16. Alternatively, the rotation center 102 of a rotational oscillation 103 in a pitch direction is provided at a lower side of the ceiling plane 12a of the electric instrument 12.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an on-board device for a railway vehicle, and more particularly to a support structure for an on-vehicle device suspended via a support by an elastic body.

  FIG. 10 shows a structure for supporting a conventional on-board equipment of a railway vehicle described in Patent Document 1 by an elastic body.

  In FIG. 10, the shaft portion of the suspension bolt 19 suspended from the suspension rail 6 in a state where the support member 3 attached to the box body 2 on-board equipment is sandwiched between the pair of elastic bodies 8 and 9. A nut 20 inserted through 19a and screwed to the extending end of the shaft portion 19a via a washer 10 is fastened and elastically supported. The shaft portion 19 a is inserted through the support member 3 in a non-contact state with the support member 3, and the stopper 4 has a predetermined gap between the washer 10 and the washer 10 in the width direction of the vehicle body 5. It is fixed.

  In Patent Document 1, the washer 10 and the stopper 4 installed with a predetermined gap with respect to the washer 10 are in contact with each other, thereby suppressing the bending vibration of the suspension bolt 19 due to the vibration of the vehicle during traveling. Is described.

JP2010-1111197

  However, when a railway vehicle is traveling, due to the vibration of the railway vehicle during traveling, the on-board equipment and the box are rotated in the pitch direction (rotational vibration about the sleeper direction) and the roll direction (based on the vehicle traveling direction). A strong rotational vibration to (rotational vibration) is excited. When rotational vibration in the pitch direction or roll direction of the box is excited, the shaft portion 19a vibrates in the vertical direction. For this reason, the structure in which the vertical direction is supported by the elastic bodies 8 and 9 as described in Patent Document 1 has a natural frequency of rotational vibration in the pitch direction or roll direction of the equipment determined by the elastic coefficient of these elastic bodies. If it matches the frequency band of the rotational frequency excited during driving, the rotational vibration becomes excessive, and an additional support member is required to suppress this excessive rotational vibration, increasing the equipment cost and design cost. The problem arises.

  An object of the present invention is to reduce rotational vibrations excited on an on-vehicle device or a box by vibrations during traveling.

  The on-board equipment supported by the elastic body of the present invention is characterized in that the rotational center position of the rotational vibration in the pitch direction or roll direction of the railway vehicle is installed below the ceiling surface of the on-board equipment.

According to one embodiment of the present invention, it is possible to reduce rotational vibration excited by vibration during traveling of on-vehicle equipment.
On-vehicle equipment

An example of the top view of the box which applied this invention, and an electric equipment. Electrical equipment Sectional drawing which shows the elastic support structure of the box in this invention. Sectional drawing which shows 1st Embodiment of the elastic support structure of the electric equipment in the box in this invention. The detailed sectional view of the elastic support structure in the present invention. The other example of the top view of the box which applied this invention, and an electric equipment. The figure which shows 2nd Embodiment of the elastic support structure of this invention. The figure which shows 3rd Embodiment of the elastic support structure of this invention. The figure which shows 4th Embodiment of the elastic support structure of this invention. The figure which shows the upper surface of the electric equipment in 4th Embodiment of the elastic support structure of this invention. The figure which shows the elastic support method of the conventional electric equipment.

In FIG. 10, which is a conventional example, the box body 2 attached to the vehicle body 5 via an elastic support due to vibration of the vehicle body is a vertical passing through the support surface 104 of the box body 2 and the center of gravity 101 of the box body 2. The rotational vibration 103 in the roll direction around the axis of the traveling direction about the center 102 which is the intersection of the center plane 105 is excited, the spring constant of the elastic support is K, the mass of the box 2 is M, and the center of gravity 101 is Rotation in the roll direction, where I _{x is} the moment of inertia of the box 2, L _m is the distance between the center of gravity 101 of the box 2 and the center 102, and L _k is the distance between the support position 106 and the center 102 by the elastic support. natural frequency _{f p} of the vibration 103 is defined by the formula (1).

Vibration of the vehicle body has been found that the frequency band of 20Hz from 5Hz is dominant, natural frequency f _p in the roll direction of the rotational vibration 103, when present in this frequency band, the rotational vibration 103 in the roll direction is The excess elastic body 8 and the lower elastic body 9 are deteriorated, and noise generated by the rotational vibration 103 in the roll direction becomes a problem. Or, when adding a support member to suppress this excessive rotational vibration, the number of members and assembly man-hours increase, so that the member cost and manufacturing cost increase, and the calculation of the natural frequency becomes complicated and the design is increased. The problem of increased costs arises.

  Hereinafter, an embodiment of on-board equipment for a railway vehicle to which the present invention is applied to the above problem will be described with reference to FIGS. In the following description, the same functional parts are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram illustrating an example of a top view of a box and an electric device according to the present invention. The box 2 is supported by the vehicle body 5 via the support member 3 in a direction in which the longitudinal direction coincides with the traveling direction of the vehicle, and the electric device 12 mounted inside the box 2 is the longitudinal direction of the electric device. It is supported by the box 2 via support members 13a to 13d in a direction that matches the traveling direction of the vehicle. Generally, in a railway vehicle, the strongest rotational vibration is excited in the pitch direction due to the acceleration / deceleration of the vehicle, so that the longitudinal direction of each of the box body 2 and the electric device 12 coincides with the vehicle traveling direction. So that it is less susceptible to rotational vibration in the pitch direction.

FIG. 2 is a diagram showing a first embodiment of the railway vehicle electrical apparatus and the elastic support structure for a box according to the present invention, and is a cross-sectional view taken along the line aa when the vehicle is viewed from the traveling direction, and FIG. FIG. FIG. 4 is an enlarged view of part B of FIG. In FIG. 2, a supporting member 3 attached to a box body 2 in which an electric device 12 such as a power converter, a transformer or a reactor is installed, and a suspension rail 6 attached to a vehicle body 5 are a bolt 19 and a bolt 19. It is fastened by a nut 20 that is screwed onto the screw. In FIG. 3, a support member 13 attached to the electric device 12 and a support member 14 attached to the box 2 are composed of an upper elastic body 8, a lower elastic body 9, and other parts. The bolt 7 and the nut 11 are used for fastening.

  The support member 14 bent into an L shape is attached to the inside of the box body 2 by, for example, welding 18. Here, the support member 14 on the box body side and the support member 13 on the electrical equipment side are such that the bolt axial direction, which is the elastic support direction, is the electrical equipment side from the vertical direction with the longitudinal direction (traveling direction) of the electrical equipment as the rotation axis. It is comprised so that it may incline to angle θ. The support member 14 on the box side and the support member 13 on the electrical equipment side are fastened by the bolt 7 and the nut 11 via the elastic support member 16. Here, similarly to the support members 13a and 13b shown in the sectional view of aa, the support members 13c and 13d similarly have the axial direction of the bolt, which is the elastic support direction, with the longitudinal direction (traveling direction) of the electrical equipment as the rotation axis. The angle θ is inclined from the vertical direction to the electric device side.

  The elastic support 16 includes, for example, a support member 13 attached to the electric device 12 and a support member 14 attached to the box 2 by an upper elastic body 8, a lower elastic body 9, a washer 10, and a cylindrical metal 15. It is fastened by bolts 7 and nuts 11 through the configured elastic support 16. FIG. 4 shows an embodiment of the elastic support 16, and a cylindrical metal 15 that is not in contact with the bolt shaft 7 a is installed around the bolt shaft 7 a, and a box body is provided at both ends of the cylindrical metal 15. Two support members 14 and washers 10 are installed, and the cylindrical metal 15, support member 14, and washer 10 are fastened by bolts 7 and nuts 11. A support member 13 of the electric device 12 that is in a non-contact state with respect to the cylindrical metal 15 is installed on the outer side in the circumferential direction of the cylindrical metal 15, and the upper elastic body 8 is installed between the support member 13 and the support member 14. The lower elastic body 9 is installed between the support member 13 and the washer 10.

  Electrical devices such as power converters, transformers or reactors generate high frequency electromagnetic vibrations when operating. The support members 13 and 14 that support the electric device on the box are elastically supported using the upper elastic body 8 and the lower elastic body 9 so that the electromagnetic vibration does not propagate to the box or the vehicle body. The rigidity of the elastic bodies 8 and 9 is designed not to propagate the frequency band of electromagnetic vibration.

In the electric device 12 attached by the elastic support structure configured as described above, the center of rotation of the rotational vibration 103 in the roll direction is the intersection of the support surface 104 of the electric device 12 and the center plane 105 passing through the center of gravity 101 of the electric device 12. The center 102 becomes. Here, the neutral surface of the support member 13 sandwiched between the upper elastic body 8 and the lower elastic body 9 becomes the support surface 104. In particular, as shown in FIG. 4, the box-side support member 14 and the electrical device-side support member 13 are configured so that the axial direction of the bolt, which is the elastic support direction, is inclined inward of the electrical device with respect to the vertical direction. Then, the center 102 serving as the rotation center of the rotational vibration 103 in the roll direction is located below the ceiling surface 12a of the electric device 12, and the center of gravity 101 of the electric device 12 is compared to the structure of the conventional example shown in FIG. Since the distance L _m to the center 102 is small and the distance L _k between the support position 106 and the center 102 by the elastic support body 16 is large, the rotational vibration 103 in the roll direction obtained by Expression (1) is obtained. The natural frequency _fp of becomes larger. By changing the bending angle of the support member 14 on the box side and the support member 13 on the electrical equipment side and changing the inclination angle θ with respect to the vertical direction of the axial direction of the bolt, which is the elastic support direction, rotational vibration in the pitch direction The natural frequency f _p of 103 can be changed, and the natural frequency f _p is set to a value larger than the frequency band from 5 Hz to 20 Hz, which is the vibration frequency band of the vehicle body, thereby exciting the rotational vibration 103 by the vibration of the vehicle body. Can be suppressed. Thereby, it is possible to promote deterioration of the upper elastic body 8 and the lower elastic body 9 and to suppress noise generated by the rotational vibration 103.

In the conventional example shown in FIG. 10, the rotation center 102 is positioned on the upper side of the electrical device, increasing the distance between the center of gravity 101 of the electric device 12 and the rotation center 102 is L _m, inherent in the roll direction of the rotational vibrations 103 frequency f _p becomes large, but from 5Hz a vehicle body vibration frequency band tends to coincide with the 20 Hz, by applying the present invention, with respect to the axial direction is the vertical direction of the bolt is an elastic support direction, electrical When the box-side support member 14 and the electric device-side support member 13 are configured to be inclined inward of the device, the center of gravity 101 of the electric device 12 is compared with the conventional structure shown in FIG. the distance _{L m} between the center 102 decreases, the distance _{L k} between the support position 106 and the center 102 of the elastic support 16 is increased, the natural frequency of the roll direction rotational vibration 103 obtained by the formula (1) f _p increases. That is, the excitation of the rotational vibration 103 due to the vibration of the vehicle body can be suppressed.

In the above-described embodiment, an example in which the natural frequency of the rotational vibration in the roll direction of the electric device is adjusted so as to be a frequency band higher than 5 Hz, which is the vibration frequency band of the vehicle body, is shown. The axial direction of the bolt, which is the elastic support direction of the support members 13a and 13b in FIG. 1, is configured to incline toward the inside of the electric device with the sleeper direction as the rotation axis with respect to the vertical direction. The axial direction of the bolt, which is the elastic support direction, is configured to be inclined inward of the electric device with the sleeper direction as the rotation axis with respect to the vertical direction, so that the natural frequency f _p of the rotational vibration in the pitch direction of the electric device is obtained. Can be adjusted to a frequency band higher than 5 Hz, which is the vibration frequency band of the vehicle body.

  FIG. 1 shows an example in which the longitudinal direction of the box or electric device is the traveling direction of the vehicle. However, the present invention is not limited to the arrangement as shown in FIG. 1, but as shown in FIG. It can also be applied to the case where the longitudinal direction of the electric device is a sleeper direction. In this case, in order to suppress excitation of rotational vibration in the pitch direction, it is desirable to incline the elastic support direction of each of the support members 13a to 13d toward the inside of the electric device with the sleeper direction in FIG. 5 as the rotation axis. Further, in order to suppress the excitation of rotational vibration in the pitch direction, the longitudinal direction of the box or the electric device is set as the traveling direction of the vehicle as shown in FIG. 1, and the support members 13a to 13d shown in FIG. It is also possible to adopt a structure in which the direction is inclined toward the inside of the electric device with the sleeper direction as the rotation axis.

  FIG. 6 is a diagram showing a second embodiment of the elastic support structure for electric equipment for railway vehicles according to the present invention, and is a cross-sectional view taken along the line aa in FIG. It is an enlarged view. In FIG. 6, the difference from FIG. 3, which is the first embodiment, is that the support member 13 bent at an arbitrary angle θ with respect to the electric device 12 is fastened to the upper surface of the electric device by a bolt 17. In other respects, the other structure is the same as that of the first embodiment. The support member 13 and the electric device 12 are fastened by the bolt 17, whereby the support member 14 and the support member 13 attached to the box body 2 are connected to the bolt 7 and the nut via the elastic support member 16 in the manufacturing process. After the attachment by 11, the support member 13 and the electric device 12 can be fastened by the bolt 17. With the elastic support structure configured as described above, when the support member 13 is fastened to the support member 14 by the bolt 7 and the nut 11 via the elastic support body 16, the mounting accuracy can be increased. For example, when the electric device 12 is lifted and attached with a hydraulic jack or the like, when the electric device 12 is fastened to the support member 13 with the bolt 17, the bolt 17 is centered on the vertical direction, so that the traveling direction and the sleeper direction are It becomes possible to attach simply by adjusting the position in the horizontal plane.

FIG. 7 is a diagram showing a third embodiment of the elastic support structure for electric equipment for railway vehicles according to the present invention, and is a cross-sectional view taken along line aa in FIG. It is an enlarged view. In FIG. 7, the difference from FIG. 3 which is the first embodiment is that a support member 13 is attached to the electric device 12 below the ceiling surface 12 a of the electric device 12. Therefore, the support member 13 is attached at a position where the neutral surface of the support member 13 constituting the support surface 104 is below the ceiling surface 12 a of the electric device 12. In the electric device 12 attached by the elastic support structure configured as described above, the center of rotation of the rotational vibration 103 in the roll direction is the intersection of the support surface 104 of the electric device 12 and the center plane 105 passing through the center of gravity 101 of the electric device 12. The center 102 becomes. The center 102 which is the rotation center of the rotational vibration 103 in the pitch direction is located below the ceiling surface 12a of the electric device 12, and is compared with the center of gravity 101 and the center 102 of the electric device 12 as compared with the conventional example of FIG. the distance L _m from that are smaller, the natural frequency f _p of the rotational oscillation 103 of the pitch direction obtained by the equation (1) becomes larger. By the natural frequency f _p of the vehicle body vibration 5Hz frequency value greater than 20 Hz, it is possible to suppress the excitation of rotational vibration 103 by the vehicle body vibration. Thereby, it is possible to promote deterioration of the upper elastic body 8 and the lower elastic body 9 and to suppress noise generated by the rotational vibration 103. However, in the third embodiment, in order to bring the rotation center 102 closer to the center of gravity 101 of the electric device, it is necessary to extend the support member 14 in the vertical direction, and there is a problem that the support member becomes large.

  8 and 9 are views showing a fourth embodiment of the elastic support structure for electric equipment for railway vehicles according to the present invention, and FIG. 8 is a cross-sectional view taken along line aa in FIG. FIG. 3 is an enlarged view of the upper left mounting portion, omitting the lower side and the right side with respect to the paper surface in the enlarged view of part A in FIG. 2. FIG. 9 is a top view of FIG. 8, with the lower part omitted from the drawing. In FIG. 8, the difference from FIG. 6, which is the second embodiment, is that the support member 13 on the electric device side that is attached to the support member 14 on the box side via the elastic support 16 is attached to the support member 14. On the other hand, the other structure is the same as FIG. As shown in FIG. 9, of the support member 14 bent into an L shape attached to the box body 2, a part of the surface 14 a close to the electric device 12 is cut out with respect to the width of the support member 13. As shown in FIG. 8, the support member 13 is fastened by the bolt 7 and the nut 11 via the elastic support body 16 in a state where the support member 13 is disposed above the support member 14. With the elastic support structure configured as described above, even when the bolt 7 and the nut 11 for fastening the support member 14, the elastic support body 16 and the support member 13 are broken due to corrosion or deterioration due to long-term use, the support is supported. It is possible to prevent the electric device 12 from falling due to the contact between the member 13 and the support member 14.

  8 and 9, in the structure in which the box-side support member 14 and the electric device-side support member 13 are configured to be inclined at an angle θ from the vertical direction to the electric device side, the electric device-side support member 13 is In the structure shown in FIG. 7 in which the support member 13 is attached below the ceiling surface 12a of the electric device 12, the example shown in FIG. The support member 13 can be attached to the upper side with respect to the support member 14. Even in such an elastic support structure, when the bolt 7 and the nut 11 that fasten the support member 14, the elastic support body 16, and the support member 13 break due to corrosion or deterioration due to long-term use, the support member 13 It is possible to prevent the electric device 12 from falling due to contact with the support member 14.

  In each of the above-described embodiments, the example in which the elastic support direction by the support member that supports the electric device on the box has been described, but the present invention is applied to the suspension rail 6 and the support member 3 that support the box 2 on the vehicle body 5. It can also be applied. In this case, the suspension rail 6 and the support member 3 that support the box 2 on the vehicle body 5 are elastically supported as shown in FIG. 4, and the elastic support direction is inclined from the vertical direction toward the inside of the box. Yes. According to this embodiment, rotational vibration in the roll direction or pitch direction excited by the box 2 can be suppressed.

  In each of the above-described embodiments, an electric device or an elastic support structure using a support member that supports a box on which the electric device is mounted is targeted. However, the present invention is not limited to the electric device, and may be an engine, a compressor, or the like. The present invention can also be applied to an on-vehicle device including a mechanical device and an elastic support structure of a support member that supports a box on which the vehicle device is mounted.

1: Electrical equipment 2: Box 3: Support member 4: Stopper 5: Car body 6: Hanging rail 7: Bolt 7a: Bolt shaft 8: Upper elastic body 9: Lower elastic body 10: Washer 11: Nut 12: Electrical equipment 13: Support member 14: Support member 15: Cylindrical metal 16: Elastic support 17: Bolt 18: Welding 101: Electrical equipment center of gravity position 102: Center of rotation 103: Rotational vibration in pitch or roll direction 104: Support surface 105: Center plane 106: support position

Claims (14)

On-rail equipment of a railway vehicle mounted under the floor of a railway vehicle and supported by the floor material or box of the railway vehicle via an elastic body,
The on-board equipment is configured such that a center position of rotational vibration of the on-board equipment in the pitch direction or roll direction of the railway vehicle is located below the ceiling surface of the on-board equipment. On-board equipment for a railway vehicle according to claim 1,
A support member that supports the floor or box of the railway vehicle via the elastic body;
A vehicle of a railway vehicle characterized in that a fulcrum position by the support member is disposed below a ceiling surface of the on-board equipment, or a support direction by the support member is inclined to the inside of the on-board equipment from a vertical direction. Upper equipment. In the on-board equipment for a railway vehicle according to claim 1 or 2,
The on-board equipment for a railway vehicle, wherein the on-board equipment is an electric equipment including any one of a power converter, a transformer, and a reactor that generates electromagnetic vibrations. On-board equipment for a railway vehicle according to claim 2 or claim 3,
The support direction of the support member is inclined at a predetermined angle from the vertical direction, and the predetermined angle is generated when the railway vehicle travels due to the natural frequency of the on-board equipment in the pitch direction or roll direction of the rail vehicle. On-rail equipment for railway vehicles, characterized in that the angle is larger than the dominant frequency band. On-board equipment for a railway vehicle according to any one of claims 2 to 4,
The support direction of the support member is inclined by a predetermined angle from the vertical direction, and the predetermined angle is an angle at which the natural frequency of the on-board equipment in the pitch direction or the roll direction of the railway vehicle is greater than 20 Hz. An on-board device for a railway vehicle. On-board equipment for a railway vehicle according to any one of claims 2 to 5,
The support direction of the support member is inclined at a predetermined angle from the vertical direction, and the support member attached to the on-vehicle equipment is above the support member attached to the floor material of the railway vehicle or the box. On-board equipment for railway vehicles, characterized in that the structure is arranged in The on-board device for a railway vehicle according to any one of claims 4 to 6,
The on-board device is mounted in a direction in which the longitudinal direction of the on-board equipment is the traveling direction of the railway vehicle,
An onboard device for a railway vehicle, wherein a support direction of the support member is inclined inward of the onboard device from a vertical direction with a traveling direction of the railway vehicle as a rotation axis. The on-board device for a railway vehicle according to any one of claims 4 to 6,
The on-board device is mounted in a direction in which the length of the on-board device is in the direction of a sleeper,
An on-board apparatus for a railway vehicle, wherein a support direction of the support member is inclined inward of the on-board apparatus from a vertical direction with a sleeper direction of the railway vehicle as a rotation axis. The on-board device for a railway vehicle according to any one of claims 4 to 6,
The on-board device is mounted in a direction in which the longitudinal direction of the on-board equipment is the traveling direction of the railway vehicle,
An on-board apparatus for a railway vehicle, wherein a support direction of the support member is inclined inward of the on-board apparatus from a vertical direction with a sleeper direction of the railway vehicle as a rotation axis.
On-board equipment for a railway vehicle according to claim 2 or claim 3,
The support member is attached to the on-board equipment at a predetermined position below a ceiling surface of the on-board equipment, and the predetermined position is the on-vehicle position in the pitch direction or the roll direction of the railway vehicle. On-board equipment for railway vehicles, characterized in that the natural frequency of the equipment is higher than the dominant frequency band generated when the railway is running. On-board equipment for a railway vehicle according to claim 2 or claim 3 or claim 9,
The support member is attached to the on-board equipment at a predetermined position below a ceiling surface of the on-board equipment, and the predetermined position is the on-vehicle position in the pitch direction or the roll direction of the railway vehicle. An on-board device for a railway vehicle, wherein the natural frequency of the device is a position where the natural frequency is higher than 20 Hz. On-board equipment for a railway vehicle according to claim 2 or claim 3 or claim 10 or claim 11,
The support member is attached to the on-board device at a predetermined position below the ceiling surface of the on-vehicle device, and the support member attached to the on-vehicle device is a flooring material for a railway vehicle. Alternatively, the on-board equipment for a railway vehicle is arranged above a support member attached to the box. The on-board equipment for a railway vehicle according to any one of claims 2 to 12,
The on-board equipment for a railway vehicle, wherein the support member is provided inside the box and elastically supports the box and the on-board equipment. The on-board equipment for a railway vehicle according to any one of claims 2 to 12,
The on-board equipment includes a box body supported by the floor material of the railway vehicle,
The on-board equipment for a railway vehicle, wherein the support member is provided outside the box and elastically supports the floor material of the railway vehicle and the box.

Images