JP6845765B2 - On-board child support device for railway vehicles and a bogie unit equipped with it - Google Patents

Description

The present invention relates to a device for supporting an on-vehicle element arranged below the vehicle body of a railroad vehicle and in front of the bogie, and a bogie unit provided with the device.

The leading car of a railroad vehicle may be provided with an on-board child of an ATS (Automatic Train Stop) device or the like near the lower part of the driver's seat. The ATS device alerts the driver by wirelessly receiving a control signal from the ground element installed at a predetermined position between the rails on the ground (for example, the center of the rail). The brake is automatically braked to stop the vehicle (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-60841

By the way, when the vehicle passes through the curved section, the center of the front end portion of the vehicle body in the left-right direction deviates from the center between the rails and behaves as if it deviates to the outer rail side. Therefore, when the on-board element is attached to the vehicle body in a vehicle traveling on a route in which a ground element is installed in or near a curved section, the on-board element is displaced to the outer track side with respect to the ground element when the vehicle passes the curve. Resulting in. Then, the communication between the ground element and the on-board element may become unstable and normal information transmission may not be possible. Further, if the ground element is replaced with one having a wide-angle communication area, the ground element needs to be replaced and the introduction cost increases.

On the other hand, when the on-board child is attached to the bogie, the bogie also turns along the curve when the vehicle passes the curve, so that the on-board child is prevented from being displaced toward the outer track side with respect to the ground element. .. However, since the bogie bears the weight of the on-board child and its support device, an eccentric load is applied to the front end side of the bogie, and it is also necessary to increase the strength of the bogie at the portion to which the on-board child support device is connected.

Therefore, an object of the present invention is to reduce the eccentric load applied to the bogie and alleviate the strength requirement of the bogie while preventing the positional deviation between the on-board element and the ground element when the railroad vehicle passes a curve.

The on-board child support device for a railroad vehicle according to one aspect of the present invention is a device for supporting the on-board child placed below the vehicle body of the railroad vehicle and in front of the bogie, and is a vehicle to which the on-board child is attached. A bogie-side support member having an upper child mounting portion and at least one bogie connecting portion connected to the bogie, and connecting the bogie mounting portion to the bogie, and a car body connecting portion connected to the car body. It includes at least one vehicle body side support member that connects the vehicle body child mounting portion to the vehicle body, and a coupler that connects the vehicle body side support member to the bogie side support member so as to be angularly displaceable.

According to the above configuration, when the vehicle passes the curve, the bogie and the support member on the bogie side also turn along the curve. Therefore, when the vehicle passes the curve, the on-board element attached to the on-board element mounting portion is attached to the ground element. It is possible to prevent the position from shifting to the outer track side. Further, since the on-vehicle element and the bogie side support member are supported by the vehicle body via the vehicle body side support member, the weight burden due to the bogie is reduced. Since the vehicle body side support member is angularly displaced with respect to the bogie side support member, the vehicle body side support member can follow the displacement of the front end portion of the vehicle body to the outer rail side when the vehicle passes a curve, and the device can be fitted with the device. Unreasonable stress is also prevented. Therefore, it is possible to reduce the eccentric load applied to the bogie and relax the strength requirement of the bogie while preventing the position shift between the on-board element and the ground element when the railroad vehicle passes the curve.

According to the present invention, it is possible to reduce the eccentric load applied to the bogie and relax the strength requirement of the bogie while preventing the position shift between the on-board element and the ground element when the railroad vehicle passes the curve.

It is a side view of the railroad vehicle which concerns on 1st Embodiment. It is a perspective view of the on-board child support device shown in FIG. 1 and its vicinity. It is a drawing explaining the communication area of the ground element which wirelessly communicates with the on-vehicle element shown in FIG. FIG. 5 is a plan view schematically explaining the behavior of the vehicle body and the bogie when the railroad vehicle shown in FIG. 1 passes a curve. It is a side view of the railroad vehicle which concerns on 2nd Embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In the following description, the front side of the railcar is the front, the direction in which the railcar travels and the vehicle body extends is the front-rear direction, and the vehicle width direction orthogonal to the direction is the left-right direction.

(First Embodiment)
FIG. 1 is a side view of the railroad vehicle 1 according to the first embodiment. As shown in FIG. 1, the railroad vehicle 1 includes a bogie 2 and a vehicle body 3 supported from below by the bogie 2. The bogie 2 includes a bogie frame 5 that supports the vehicle body 3 via an air spring 4 as a secondary suspension. The bogie frame 5 includes a cross beam 5a extending in the left-right direction, but does not include a side beam extending in the front-rear direction from both ends of the cross beam 5a in the left-right direction. A pair of wheel sets 6 are arranged on both sides of the cross beam 5a in the front-rear direction. The wheel axle 6 has an axle 6a extending along the left-right direction and a pair of wheels 6b provided on both sides of the axle 6a in the left-right direction. Bearings 7 that rotatably support the axle 6a on the lateral side of the wheel 6b are provided at both ends of the axle 6a in the left-right direction, and the bearing 7 is housed in the axle box 8 to accommodate the axle box. 8 rotatably supports the end of the axle 6a.

The left-right end of the cross beam 5a is connected to the axle box 8 by an axle beam type axle box support device 9. The axle box support device 9 includes an axle beam 10 extending from the axle box 8 in the front-rear direction toward the cross beam 5a side. The bogie frame 5 is provided with a pair of receiving seats 11 that project from the cross beam 5a toward the shaft beam 10 and are spaced apart from each other in the left-right direction. The shaft beam 10 is elastically coupled to the receiving seat 11. Specifically, the shaft beam 10 has a tubular portion having an axis in the left-right direction at its tip, and the mandrel 12 is inserted into the tubular portion via an elastic bush 13 (for example, a rubber bush). , Both ends of the mandrel 12 are fixed to the receiving seat 11. That is, the axle box 8 is connected to the bogie frame 5 so that it can be displaced with respect to the bogie frame 5 by elastic deformation of the elastic bush 13 and can be angularly displaced around the axle 6a.

A leaf spring 14 extending in the front-rear direction is interposed between the axle box 8 and the bogie frame 5 as a primary suspension. The leaf spring 14 passes through the space between the pair of receiving seats 11. The central portion 14a of the leaf spring 14 in the longitudinal direction is arranged lower than the end portions 14b on both sides of the leaf spring 14 in the longitudinal direction. The leaf spring 14 has a bow shape that is convex downward when viewed from the side of the bogie. The pair of axle boxes 8 separated in the front-rear direction support the end portions 14b of the leaf spring 14 from below. The central portion 14a of the leaf spring 14 supports the left-right end portion of the cross beam 5a from below. As a result, the cross beam 5a is supported by the axle box 8 via the leaf spring 14. That is, the leaf spring 14 has both the function of the primary suspension and the function of the conventional side beam.

The leaf spring 14 is formed of, for example, a fiber reinforced resin. A pressing member 15 having a downwardly convex arcuate lower surface is provided below the left-right end portion of the cross beam 5a, and the pressing member 15 is placed on the central portion 14a of the leaf spring 14 from above and comes into contact with each other so as to be separable. To do. That is, the pressing member 15 is not fixed to the leaf spring 14 by the fixture, but is brought into contact with the upper surface of the leaf spring 14 by the contact pressure due to the downward load due to gravity from the cross beam 5a and the reaction force of the leaf spring 14 against it. Is kept.

A spring seat 16 is attached to the upper end of the axle box 8, and the end 14b of the leaf spring 14 is supported by the axle box 8 from below via the spring seat 16. The upper surface of the spring seat 16 is inclined toward the center side of the bogie when viewed from the side of the bogie. The end portion 14b of the leaf spring 14 is also placed on the spring seat 16 from above in a state where it is not fixed to the spring seat 16. The spring seat 16 has a base member 17 (for example, anti-vibration rubber) installed on the axle box 8 and a receiving member 18 installed on the base member 17 and positioned on the base member 17. The receiving member 18 has a recess that is open upward and toward the center side of the bogie, and the end portion 14b of the leaf spring 14 is housed in the recess.

The on-board element 40 is arranged in front of the bogie 2 of the leading car and below the vehicle body 3 of the railroad car 1. The on-board child 40 receives a radio signal from the ground element 41 (see FIG. 3) at a predetermined position as a device of an ATS (Automatic Train Stop) device or an ATC (Automatic Train Control) device. In the present embodiment, each of the on-board element 40 and the ground element 41 is one, but may be a plurality. The on-board child 40 is supported by the bogie 2 and the vehicle body 3 via the on-board child support device 20. The on-board child support device 20 and the bogie 2 to which the on-board child support device 20 is connected constitute the bogie unit 50.

FIG. 2 is a perspective view of the on-board child support device 20 shown in FIG. 1 and its vicinity. As shown in FIGS. 1 and 2, the on-board child support device 20 includes a bogie side support member 21 and a pair of vehicle body side support members 22. The carriage side support member 21 includes a support beam portion 30 extending in the left-right direction in front of the carriage 2, a pair of arm portions 31 extending in the front-rear direction from both ends of the support beam portion 30 toward the carriage 2, and a pair. It has a pair of trolley connecting portions 32 provided at the tip of the arm portion 31 on the trolley side. A vehicle-mounted child mounting portion 24 to which the vehicle-mounted child 40 is mounted is provided at the center of the support beam portion 30 in the left-right direction.

The pair of arm portions 31 are inclined upward from the support beam portion 30 toward the carriage 2. The pair of bogie connecting portions 32 are separated from each other in the left-right direction, and are respectively connected to the pair of spring seats 16 separated in the left-right direction of the bogie 2. Specifically, the bogie connecting portion 32 is connected to the receiving member 18 of the spring seat 16. The bogie connecting portion 32 may be connected to the axle box 8. The bogie connecting portion 32 rotatably connects the bogie side support member 21 to the bogie 2 around the axis X1 in the left-right direction. As an example, the bogie connecting portion 32 can be a rubber bush portion having an axis X1 in the left-right direction. The bogie connecting portion 32 is configured so that the resistance to the angular displacement around the axis X1 in the left-right direction is smaller than the resistance to the swing displacement in the left-right direction.

Further, a support beam connecting portion 33 is provided at an end portion of the pair of arm portions 31 on the support beam portion 30 side. Similar to the vehicle body connecting portion 34, the support beam connecting portion 33 rotatably connects the arm portion 31 to the supporting beam portion 30 around the axis X2 in the left-right direction. As an example, the support beam connecting portion 33 can be a rubber bush portion having an axis X2 in the left-right direction. One of the pair of support beam connecting portions 33 may connect the arm portion 31 to the support beam portion 30 so as not to rotate.

The pair of vehicle body side support members 22 have an arm shape and extend in the vertical direction when the railway vehicle 1 travels in a straight line. The extending direction of the vehicle body side support member 22 may be a non-vertical direction at an angle closer to the vertical direction than the extending direction of the arm portion 31 of the bogie side support member 21. The pair of vehicle body side support members 22 have a vehicle body connecting portion 34 at the upper end thereof. The pair of vehicle body connecting portions 34 are separated from each other in the left-right direction, and the vehicle body side support member 22 can be rotated at least around the axes X3 and X4 in the front-rear direction with respect to the bracket 3a provided under the floor of the vehicle body 3. Link. As an example, the vehicle body connecting portion 34 can be a spherical bearing portion.

The pair of vehicle body side support members 22 are arranged on both sides of the vehicle top child mounting portion 24 in the left-right direction. A relay coupling portion 23 (coupler) is provided at the lower end portion of the pair of vehicle body side support members 22. The vehicle body side support member 22 is coupled to the bogie side support member 21 by a pair of relay coupling portions 23 so as to be angularly displaceable. The pair of relay coupling portions 23 are separated from each other in the left-right direction, and the lower end portions of the vehicle body side support member 22 are rotatably connected to the support beam portion 30 at least around the axes X5 and X6 in the front-rear direction. As an example, the relay coupling portion 23 can be a spherical bearing portion.

When the railway vehicle 1 travels in a straight line, the pair of vehicle body side support members 22, the support beam portions 30, and the lower surface of the vehicle body 3 have a rectangular shape (or trapezoidal shape) when viewed from the front-rear direction. When the railroad vehicle 1 travels on a curve, angular displacement occurs in the relay coupling portion 23 and the vehicle body connecting portion 34 due to the lateral displacement of the vehicle body 3 with respect to the bogie 2, so that the pair of vehicle body side support members 22 are supported by the supporting beam portions. It is displaced to the outer rail side with respect to 30. That is, the support beam portion 30 maintains its relative position in the left-right direction with respect to the axle 6a while being kept parallel to the axle 6a even when traveling on a curved line.

FIG. 3 is a drawing for explaining the communication area C of the ground element 41 that wirelessly communicates with the on-board element 40 shown in FIG. FIG. 4 is a plan view schematically explaining the behavior of the bogie 2 and the vehicle body 3 when the railroad vehicle 1 shown in FIG. 1 passes a curve. In FIG. 3, the communication area C of the ground element 41 is shown by a broken line. Further, in FIG. 4, a virtual track line L showing a center line passing between the pair of rails R is shown.

As shown in FIGS. 3 and 4, the ground element 41 is installed at a predetermined position between the pair of rails R in the curved section of the track or its vicinity. In the case of the present embodiment, the specified position where the ground element 41 is installed is the center M between the rails R, but it may be a position other than the center between the rails R depending on the specifications. When the railroad vehicle 1 passes through the curved section, the center P in the left-right direction of the front end portion (driver's cab) of the vehicle body 3 deviates from the track line L to the outer track side. However, the on-board child 40 is connected to the bogie 2 by the bogie-side support member 21 of the on-board child support device 20, and when passing through the vehicle curve, the bogie-side support member 21 turns along the curve together with the bogie 2. The displacement of the on-board element 40 toward the outer rail side with respect to the ground element 41 when passing through the vehicle curve is prevented. Therefore, even when passing through the vehicle curve, the on-board element 40 can enter the communication area C of the ground element 41, and the on-board element 40 can stably receive the control signal from the ground element 41.

Further, as shown in FIGS. 1 and 2, since the vehicle head element 40 and the bogie side support member 21 are supported by the vehicle body 3 via the vehicle body side support member 22, the weight burden by the bogie 2 is reduced. Since the vehicle body side support member 22 is angularly displaced with respect to the bogie side support member 21, the vehicle body side support member 22 follows the displacement of the front end portion of the vehicle body 3 toward the outer rail side when passing through the vehicle curve. It is possible to prevent excessive stress from being applied to the on-board child support device 20. Therefore, it is possible to reduce the eccentric load applied to the bogie 2 and relax the strength requirement of the bogie 2 while preventing the position of the on-board element 40 from being displaced with respect to the ground element 41 when the railroad vehicle 1 passes the curve.

Further, the extending direction of the vehicle body side support member 22 is a vertical direction (or a direction having an angle close to it) when traveling in a straight line, and the vehicle body side support member 22 has the on-board element 40 and the vehicle body element 40 in the longitudinal direction (tensile direction) thereof. Since the carriage side support member 21 can be stably supported, bending stress generated in the arm portion 31 of the carriage side support member 21 can be suppressed. Further, since the vehicle body side support member 22 extends in the vertical direction (or a direction having an angle close to the vertical direction) when traveling in a straight line, the vehicle body side support member 22 even if the vehicle body 3 moves up and down due to expansion and contraction of the air spring 4. Vibration due to bending of the vehicle is unlikely to occur, and vertical vibration of the on-board element 40 can be suppressed.

Further, since the pair of bogie connecting portions 32 are arranged apart from each other in the left-right direction and the pair of vehicle body connecting portions 34 are also arranged apart from each other in the left-right direction, the support of the on-vehicle element 40 is stable. Further, since the pair of vehicle body side support members 22 are arranged on both sides of the vehicle top child mounting portion 24 in the left-right direction, a coupler (not shown) for connecting adjacent vehicles is placed between the pair of vehicle body side support members 22. Can be passed.

Further, since the on-board child support device 20 and the on-board child 40 are supported not only by the bogie 2 but also by the vehicle body 3, the weight between the springs of the bogie 2, that is, the primary suspension (leaf spring 14) and the secondary suspension (leaf spring 14) and the secondary suspension ( The weight between the air spring 4) and the air spring 4) is reduced, and the ride quality of the passenger is improved.

(Second Embodiment)
FIG. 5 is a side view of the railway vehicle 101 according to the second embodiment. The same reference numerals are given to the configurations common to those of the first embodiment, and the description thereof will be omitted. As shown in FIG. 5, the bogie 102 of the railroad vehicle 101 is a general bogie in which the bogie frame 105 has an H shape in a plan view. That is, the bogie frame 105 has a cross beam 105a extending in the left-right direction and a pair of side beams 105b extending in the front-rear direction from both ends of the cross beam 105a in the left-right direction. A coil spring 114 is interposed between the side beam 105b and the axle box 8 as a primary suspension. The configuration of the on-board child support device 20 is the same as that of the first embodiment. The bogie connecting portion 32 of the on-board child support device 20 is connected to the side beam 105b of the bogie 102 to form the bogie unit 150. Since the other configurations are the same as those of the first embodiment described above, the description thereof will be omitted.

1,101 Railroad vehicle 2,102 Bogie 3 Body 5a, 105a Cross beam 6a Axle 8 Axle box 14 Leaf spring 16 Spring seat 20 On-board child support device 21 Bogie side support member 22 Body side support member 23 Relay coupling part (coupler)
24 On-board child mounting part 30 Support beam part 31 Arm part 32 Bogie connection part 33 Support beam connection part 34 Body connection part 40 On-board child 41 Ground element 50,150 Bogie unit

Claims (6)

A device that supports an on-board child that is placed below the body of a railroad car and in front of the bogie.
The on-board child mounting part to which the on-board child is attached and
A bogie-side support member having at least one bogie connecting portion connected to the bogie and connecting the on-board child mounting portion to the bogie.
At least one vehicle body side support member having a vehicle body connecting portion connected to the vehicle body and connecting the on-vehicle child mounting portion to the vehicle body.
An on-vehicle child support device for a railway vehicle, comprising a coupler that connects the vehicle body side support member to the bogie side support member so as to be angularly displaceable. The bogie side support member has at least one arm portion provided with the bogie connecting portion and extending in the front-rear direction.
The vehicle body side support member has an arm shape extending from the coupler toward the vehicle body.
The on-board child support of a railway vehicle according to claim 1, wherein the extending direction of the vehicle body side support member is a vertical direction or a direction having an angle closer to the vertical direction than the extending direction of the arm portion. apparatus. The at least one bogie connecting portion includes a pair of bogie connecting portions separated in the left-right direction.
The bogie-side support member has a support beam portion that extends in the left-right direction in front of the bogie and is provided with the on-board child mounting portion.
The at least one arm portion includes a pair of arm portions extending from both ends of the support beam portion toward the carriage.
The vehicle-mounted child support device for a railway vehicle according to claim 2, wherein the at least one vehicle-vehicle-side support member includes a pair of vehicle-body-side support members arranged on both sides of the vehicle-mounted child mounting portion in the left-right direction. The vehicle body connecting portion rotatably connects the vehicle body side support member to the vehicle body at least around an axis in the front-rear direction.
The vehicle of a railway vehicle according to any one of claims 1 to 3, wherein the coupler rotatably connects the vehicle body side support member to the bogie side support member at least around an axis in the front-rear direction. Upper child support device. The on-board child support of a railway vehicle according to any one of claims 1 to 4, wherein the bogie connecting portion rotatably connects the bogie side support member to the bogie around an axis in the left-right direction. apparatus. A bogie unit including the on-board child support device according to any one of claims 1 to 5 and a bogie to which the on-board child support device is connected.
The trolley has a cross beam extending in the left-right direction, a pair of axle boxes separated in the front-rear direction and supporting the ends of the pair of axles, respectively, and a cross beam supporting the ends in the left-right direction in the front-rear direction. A leaf spring that extends and is supported by the pair of axle boxes, and a spring seat that is interposed between the axle box and the leaf springs are provided.
The bogie connecting portion of the on-board child support device is a bogie unit of a railroad vehicle connected to the spring seat or the axle box.

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