JP2018149902A - Railway vehicle truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple structure capable of stabilizing the contact state of a current collector with respect to a third rail irrespective of spring bending.SOLUTION: A railway vehicle truck is provided with: a truck frame; a pair of spring lower members that are disposed separately from each other in a vehicle longitudinal direction and support the truck frame via a spring; and a collector beam that is connected to the pair of spring lower members in the state of being extended in the vehicle longitudinal direction and to which a current collector of a third-rail type is attached. Each of the pair of spring lower members has: an axle box that stores a bearing for supporting an axle; a connection mechanism that connects a part of the axle box on a truck center side to the truck frame; a cover member that is disposed outside the axle box in a vehicle width direction and is connected to the axle box so as to be rotatable about the axis of the axle relatively to the axle box, and to which the collector beam is connected; and an elastic bush that is interposed between the cover member and the axle box and is disposed concentrically with the axle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a railway vehicle carriage to which a third rail type current collector is attached.

  There are a plurality of methods for collecting power from the ground equipment by the railway vehicle. In the third rail system, a third rail (feed rail) is laid in parallel with a pair of traveling rails, and a current collector is attached to a current collecting beam connected to a shaft box of the carriage, and the current collector of the current collector is collected. Current collection is performed by the shoe sliding in contact with the third rail. For example, in the carts of Patent Documents 1 and 2, the current collecting beam is connected to the central portion of the axle box via a rubber plate or a rubber bush. Moreover, in the carts of Patent Documents 3 to 5, the current collecting beams are connected to the axle box via a link structure.

Japanese Utility Model Publication No. 50-133607 Japanese Utility Model Publication No. 53-22406 JP-T-2016-534940 US Pat. No. 6,079,335 US Publication No. 2015/0090553

  However, in the case of the configurations of Patent Documents 1 and 2, in the state where the axle box is connected to the carriage frame by the shaft beam, the carriage frame is moved in the vertical direction by the bending of the spring interposed between the carriage frame and the axle box. When the relative displacement occurs, the carriage frame rotates the axle box around the axis of the axle via the shaft beam. If it does so, the height of a current collection beam will fluctuate, the contact state to the 3rd rail of the current collection shoes of a current collection device will become unstable, and current collection performance will fall. In the case of the configurations of Patent Documents 3 to 5, since a link structure is necessary, the structure becomes complicated and the cost is increased and the weight is increased.

  Then, an object of this invention is to provide the simple structure which stabilizes the contact state of the current collector with respect to a 3rd track | line irrespective of the bending of a spring.

  A railcar bogie according to an aspect of the present invention includes a bogie frame, a pair of unsprung members that are spaced apart in the vehicle longitudinal direction and support the bogie frame via a spring, and a state that extends in the vehicle longitudinal direction. And a current collecting beam connected to the pair of unsprung members and to which a third rail type current collector is attached, each of the pair of unsprung members accommodates a bearing that supports an axle. And a connecting mechanism that connects a portion of the axle box on the center side of the carriage to the carriage frame, and an outer side in the vehicle width direction of the axle box that is relatively rotatable about the axis of the axle with respect to the axle box. A cover member connected to the axle box, to which the current collecting beam is connected, and an elastic bushing interposed between the cover member and the axle box and arranged concentrically with the axle.

  According to the above configuration, even if the bogie frame that is displaced in the vertical direction by the bending of the spring rotates the axle box via the coupling mechanism, the cover member is attached to the axle box via the elastic bush. It can rotate around. Therefore, when the bogie frame is displaced in the vertical direction due to the bending of the spring, the cover member is restrained from being rotated along with the axle box, and the vertical displacement of the current collecting beam connected to the cover member can be suppressed. Therefore, although it is a simple structure, the contact state of the current collector with respect to the third rail can be stabilized regardless of the bending of the spring.

  According to the present invention, it is possible to provide a simple structure that stabilizes the contact state of the current collector with respect to the third rail regardless of the bending of the spring.

It is a side view of the bogie of the railway vehicle which concerns on embodiment. It is a side view of the state which removed the elastic bush, cover member, and current collection beam of the trolley | bogie shown in FIG. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is an enlarged view of the elastic seat shown in FIG. 4, and its vicinity. It is an enlarged view of the elastic seat of a modification, and its vicinity.

  Hereinafter, embodiments will be described with reference to the drawings. In the following description, the direction in which the railway vehicle travels and the direction in which the vehicle body extends is defined as the vehicle longitudinal direction, and the lateral direction perpendicular thereto is defined as the vehicle width direction. The longitudinal direction of the vehicle can also be referred to as the front-rear direction, and the vehicle width direction can also be referred to as the left-right direction.

  FIG. 1 is a side view of a carriage 2 of a railway vehicle 1 according to the embodiment. FIG. 2 is a side view of the carriage 2 shown in FIG. 1 with the cover member 17, the elastic bush 18 and the current collecting beam 19 removed. As shown in FIG. 1, the carriage 2 supports the vehicle body 3 of the railway vehicle 1 from below. The carriage 2 includes a carriage frame 5 that supports the vehicle body 3 via an air spring 4. The carriage frame 5 has a horizontal beam (not shown) extending in the vehicle width direction and a pair of side beams 5a connected to both ends of the horizontal beam in the vehicle width direction and extending in the vehicle longitudinal direction. A pair of unsprung members 6 are disposed on both sides in the vehicle longitudinal direction of the carriage frame 5 so as to be separated from each other in the vehicle longitudinal direction. Each of the pair of unsprung members 6 supports the carriage frame 5 from below via a spring 7 (for example, a coil spring) serving as a primary suspension.

  Since the unsprung member 6 is symmetric with respect to the bogie centerline extending in the longitudinal direction of the vehicle, the unsprung member 6 will mainly be described on behalf of the structure on one side in the vehicle width direction. The unsprung member 6 includes a wheel shaft 8, a bearing 9, a shaft box 10, and a coupling mechanism 11. The axle 8 has an axle 8a extending along the vehicle width direction and a pair of wheels 8b provided on the axle 8a. The bearing 9 rotatably supports the end portion of the axle 8a. The axle box 10 accommodates the bearing 9.

  As shown in FIG. 2, the coupling mechanism 11 constitutes a so-called shaft beam type axle box support device. The connection mechanism 11 elastically connects a portion of the axle box 10 on the center side of the carriage to the carriage frame 5. The coupling mechanism 11 includes a shaft beam 12, a receiving seat 13, an elastic cylinder 14, a mandrel 15, and a lid 16. The shaft beam 12 is formed integrally with the shaft box 10 and protrudes from the shaft box 10 toward the center of the carriage in the vehicle longitudinal direction. The receiving seat 13 is provided on the carriage frame 5 so as to protrude toward the shaft beam 12.

  The elastic cylinder 14 is accommodated in a cylinder part 12a that is open on both sides in the vehicle width direction, which is the tip part of the shaft beam 12 (see FIG. 4). The elastic cylinder 14 has a cylindrical shape and is arranged so that its axis is directed in the vehicle width direction. A mandrel 15 is accommodated inside the elastic cylinder 14 in the radial direction. The mandrel 15 protrudes from the elastic cylinder 14 on both sides in the vehicle width direction. Both ends of the mandrel 15 are fitted in the groove 13 a of the receiving seat 13 and are fixed by the lid 16. That is, the shaft beam 12 is elastically coupled to the receiving seat 13 via the elastic cylinder 14.

  As shown in FIG. 1, the unsprung member 6 further includes a cover member 17 and an elastic bush 18. The cover member 17 is disposed outside the axle box 10 in the vehicle width direction and overlaps the axle box 10 when viewed from the vehicle width direction. The cover member 17 is connected to the axle box 10 so as to be rotatable relative to the axle box 10 about the axis X of the axle 8a. The elastic bush 18 is interposed between the cover member 17 and the axle box 10 and elastically couples the cover member 17 to the axle box 10. That is, the cover member 17 can rotate with respect to the axle box 10 within a range in which the elastic bush 18 can be elastically deformed.

  The cover member 17 includes a cover portion 17a connected to the elastic bush 18 and a beam support portion 17b protruding from the cover portion 17a toward the center of the carriage. The cover portion 17a overlaps the axle box 10 when viewed from the outside in the vehicle width direction. The beam support portion 17b overlaps the shaft beam 12 when viewed from the outside in the vehicle width direction. The beam support portion 17b is formed with an accommodation recess 17c that opens toward the center of the carriage. An end 19a of a current collecting beam 19 extending in the longitudinal direction of the vehicle is inserted through the elastic seat 20 into the housing recess 17c.

  That is, each end 19a on both sides in the longitudinal direction of the current collecting beam 19 is connected to the cover member 17 of the pair of unsprung members 6 disposed on both sides in the vehicle longitudinal direction. The current collecting beam 19 has, for example, a prism shape. The current collecting beam 19 overlaps the mandrel 15 and the vicinity thereof when viewed from the outside in the vehicle width direction. A third rail type current collecting device 21 is attached to the current collecting beam 19. The current collector 21 has a current collecting shoe 21a that protrudes outward in the vehicle width direction and contacts a third rail (not shown) from above.

  3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is an enlarged view of the elastic seat 20 shown in FIG. 4 and the vicinity thereof. As shown in FIGS. 3 and 4, the axle box 10 includes an axle box main body portion 10 a that houses the bearing 9, and a cylindrical cover support portion 10 b that protrudes outward from the axle box main body portion 10 a in the vehicle width direction. . The axle box 10 is formed with a side opening 10c that is opened outward in the vehicle width direction through the internal space of the cylindrical cover support portion 10b. The cover support portion 10b may be formed integrally with the axle box main body 10a, or may be a separate object fixed to the axle box main body 10a. An elastic bush 18 is fitted on the cover support portion 10b. The elastic bush 18 has a cylindrical shape, and is arranged concentrically with the axle 8a so that its axis coincides with the axis X of the axle 8a.

  A concave portion 17 d for accommodating the elastic bush 18 is formed on the inner surface in the vehicle width direction of the cover portion 17 a of the cover member 17. In the cover member 17, the cover member 17 is externally fitted to the elastic bush 18 in the recess 17 d. The side opening 10 c of the axle box 10 is closed from the outside in the vehicle width direction by the cover member 17 and the elastic bush 18. The cover member 17 rotates relative to the axle box 10 around the axis line X of the axle 8 a by shear deformation of the elastic material of the elastic bush 18. The elastic material of the elastic bush 18 is softer than the hardest portion of the elastic seat 20 accommodated in the accommodating recess 17 c of the cover member 17. The elastic material of the elastic bush 18 is softer than the elastic material of the elastic cylinder 14 of the coupling mechanism 11.

  As shown in FIG. 5, the elastic seat 20 is accommodated in contact with the concave inner surface of the accommodating recess 17 c of the cover member 17. The elastic seat 20 contacts the end surface 19b of the end 19a of the current collecting beam 19 and the side surfaces 19c (upper surface, lower surface, left surface, and right surface) that are four surfaces adjacent to the end surface 19b of the current collecting beam 19. The portion of the elastic seat 20 that contacts the end surface 19 b of the current collecting beam 19 has a smaller deformation resistance than the portion of the elastic seat 20 that contacts the side surface 19 c of the current collecting beam 19.

  Specifically, the contact density between the elastic seat 20 and the end surface 19 b of the current collecting beam 19 is sparser than the contact density between the elastic seat 20 and the side surface 19 c of the current collecting beam 19. For example, the elastic seat 20 makes full contact with the surface of the side surface 19 c of the current collecting beam 19 that faces the elastic seat 20, but partially contacts the end surface 19 b of the current collecting beam 19. In the present embodiment, a gap 20 a is formed in a region of the elastic seat 20 that faces the end face 19 b of the current collecting beam 19.

  Here, although the end face 19b of the current collecting beam 19 and the elastic seat 20 are in partial contact in FIG. 5, they may be in non-contact with the entire surface. For example, as shown in FIG. 6, the end face 19 b of the current collecting beam 19 may be configured to face the elastic seat 120 with a gap. At that time, the rigidity of the portion 120a facing the end surface 19b of the current collecting beam 19 with a gap in the elastic seat 120 may be lower than the rigidity of the portion 120b contacting the side surface 19c of the current collecting beam 19. . Further, when the entire surface is not in contact, a portion 120a of the elastic seat 120 that faces the end surface 19b of the current collecting beam 19 is eliminated, and the end surface 19b of the current collecting beam 19 interposes air or the like on the concave inner surface of the housing recess 17c. It is good also as a structure which opens a clearance gap and opposes. In addition, rubber etc. are used for the elastic material of the elastic cylinder 14, the elastic material of the elastic bush 18, and the material of the elastic seat 20, for example.

  According to the configuration described above, even if the bogie frame 5 that is displaced in the vertical direction due to the bending of the spring 7 rotates the axle box 10 via the coupling mechanism 11, the cover member 17 with respect to the axle box 10. Can be relatively rotated around the axis X of the axle 8a via the elastic bushing 18. Therefore, when the carriage frame 5 is displaced in the vertical direction due to the bending of the spring 7, the cover member 17 is restrained from being rotated by the axle box 10, and the current collecting beam 19 connected to the cover member 17 is vertical. Directional displacement can be suppressed. Therefore, although it is a simple structure, the contact state of the current collector 21 with respect to the third rail can be stabilized regardless of the bending of the spring 7.

  Further, since the cover member 17 that covers the side opening 10c of the axle box 10 has a function of supporting the current collecting beam 19, the configuration can be simplified. In addition, since the end 19a of the current collecting beam 19 is inserted into the accommodating recess 17c of the cover member 17 via the elastic seat 20, the support structure of the current collecting beam 19 can be simplified. Further, since the elastic material of the elastic bush 18 is softer than the hardest part of the elastic seat 20, the cover member 17 can be easily rotated with respect to the axle box 10, and the current collecting beam 19 and the cover member 17 It is possible to prevent an excessive force from acting on the elastic seat 20 therebetween.

  Further, the portion of the elastic seat 20 that contacts the end surface 19b of the current collecting beam 19 has a lower deformation resistance than the portion of the elastic seat 20 that contacts the side surface 19c of the current collecting beam 19, so that the axle box 10 rotates. Even if the distance between the pair of cover members 17 is reduced as the distance between the pair of axle boxes 10 is reduced, the elastic seat 20 in contact with the current collecting beam 19 is easily deformed. Therefore, even if the distance between the pair of axle boxes 10 is reduced as the carriage frame 5 is displaced in the vertical direction, an excessive force can be prevented from acting on the current collecting beam 19. This is because the contact density between the elastic seat 20 and the end surface 19b of the end 19a of the current collecting beam 19 is made sparser than the contact density between the elastic seat 20 and the side 19c of the end 19a of the current collecting beam 19. Can be realized easily.

  In addition, this invention is not limited to embodiment mentioned above, The structure can be changed, added, or deleted. For example, the coupling mechanism 11 is not limited to the shaft beam method, and may be another method as long as the shaft box 10 is rotated in conjunction with the vertical displacement of the carriage frame 5. The height positions of the beam support portion 17b and the current collecting beam 19 of the cover member 17 are not limited to those of the present embodiment, and may be changed according to specifications. In the elastic seat 20, the portion of the elastic seat 20 that contacts the end surface 19 b of the current collecting beam 19 may be made of a softer material than the portion of the elastic seat 20 that contacts the side surface 19 c of the current collecting beam 19. The cart 2 may be a cart with a bolster instead of a bolsterless cart. The carriage 2 may have a configuration using a leaf spring instead of the side beam 5a and the spring 7 (coil spring). That is, a pair of front and rear axle boxes may support the end portions on both sides in the longitudinal direction of the leaf spring from below, and the center portion in the longitudinal direction of the leaf spring may support the lateral beam from below.

2 bogie 5 bogie frame 6 unsprung member 7 spring 8a axle 9 bearing 10 axle box 10c side opening 11 coupling mechanism 17 cover member 17c receiving recess 18 elastic bush 19 current collecting beam 19a end 19b end face 19c side face 20, 120 elastic seat 21 Current collector

Claims (7)

Bogie frame,
A pair of unsprung members disposed apart in the longitudinal direction of the vehicle and supporting the bogie frame via a spring;
A current collecting beam connected to the pair of unsprung members in a state of extending in the longitudinal direction of the vehicle and to which a third rail type current collecting device is attached;
Each of the pair of unsprung members is
An axle box that houses a bearing that supports the axle;
A coupling mechanism for coupling a portion of the axle box on the center side of the carriage to the carriage frame;
A cover member disposed outside the axle box in the vehicle width direction, connected to the axle box so as to be rotatable relative to the axle box around an axis line of the axle, and to which the current collecting beam is connected;
A railcar carriage having an elastic bushing interposed between the cover member and the axle box and arranged concentrically with the axle. The axle box has a side opening opened outward in the vehicle width direction,
The railway vehicle carriage according to claim 1, wherein the cover member covers the side opening from the outside in the vehicle width direction. The cover member has an accommodation recess opened toward the center of the carriage,
An elastic seat is housed in the housing recess,
3. The railcar bogie according to claim 1, wherein an end of the current collecting beam is inserted into the housing recess via the elastic seat.   The bogie for a railway vehicle according to claim 3, wherein an elastic material of the elastic bush is softer than a portion having the highest hardness in the elastic seat. The elastic seat is in contact with an end surface of the end portion of the current collecting beam and a side surface adjacent to the end surface of the current collecting beam;
The railway vehicle according to claim 3 or 4, wherein a portion of the elastic seat that contacts the end face of the current collecting beam has a smaller deformation resistance than a portion of the elastic seat that contacts the side surface of the current collecting beam. Trolley.   The bogie for a railway vehicle according to claim 5, wherein a contact density between the elastic seat and the end surface is sparser than a contact density between the elastic seat and the side surface.   The bogie for a railway vehicle according to claim 5, wherein the elastic seat and the end face are not in contact with each other.

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