JP2016113074A - Steering bogie for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a link-type steering bogie having a high design flexibility, in which a link mechanism and other components, etc. hardly interfere with each other.SOLUTION: A steering bogie comprises a link mechanism which is in conjunction with the rotation of the bogie frame with respect to the rolling stock body, and which steers at least one of wheel shafts by displacing an axle box via an axle beam. The link mechanism includes a lever member arranged closer to the axle box than the center of the bogie frame in a rolling stock width direction, and a connection link closer to the center of the bogie frame in the rolling stock longitudinal direction. The connection link connects a bolster beam or the rolling stock body and the lever member, and the lever member rotates around a fulcrum part connected to the connection link and the axle beam, and supported by the bogie frame to steer the wheel shafts.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a steering carriage for a railway vehicle.

  When the railway vehicle passes the curve, the bogie frame rotates in the yawing direction with respect to the vehicle body. Patent Document 1 discloses a link type steering cart that uses this phenomenon to steer a wheel shaft in conjunction with rotation of a cart frame with respect to a vehicle body (see FIG. 4 of Patent Document 1).

JP 10-226333 A

  By the way, in the vehicle longitudinal direction center part of the bogie frame, in addition to the bogie frame itself and the components of the bogie, equipment and wiring on the vehicle body side are arranged. However, the link type steering cart as disclosed in Patent Document 1 is easy to interfere with other components and the like because the components of the link mechanism are located in the vehicle longitudinal direction central portion of the cart frame. There was a problem that the degree was low.

  When the steering cart passes through a curve, a centrifugal force is applied not only to the wheel shaft but also to the cart frame, and a lateral pressure acts on the outer wheel. When lateral pressure is applied, it is necessary to support the reaction force against this on the side of the carriage frame, and in order to support it by the link mechanism of the steering carriage, it is necessary to increase its strength. Therefore, there is a problem that the weight of the link mechanism itself is increased and the structure is complicated.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a link-type steering cart that is unlikely to interfere with a link mechanism and other components and that has a high degree of design freedom.

  A steering cart according to an aspect of the present invention includes a bogie frame that supports a vehicle body in a yawing direction so as to be rotatable through a pillow beam or without a pillow beam, an axle extending along a vehicle width direction, and the axle. A pair of wheel shafts each having wheels provided on both sides, spaced apart in the longitudinal direction of the vehicle, a shaft box that houses a bearing that supports each axle, and an elastic member that extends from the shaft box An axle box support device having a shaft beam coupled to the bogie frame via, and interlocking with the rotation of the bogie frame with respect to the vehicle body, and displacing the axle box via the shaft beam to displace at least one of the axle boxes A link mechanism that steers the wheel shaft, and the link mechanism is a lever member disposed closer to the axle box than the vehicle longitudinal center of the carriage frame, and the vehicle longitudinal direction of the carriage frame relative to the lever member A connecting link located near the center; The connecting link connects the pillow beam or the vehicle body and the lever member, and the lever member is connected to the connecting link and the shaft beam and has a fulcrum portion supported by the carriage frame. The wheel axle is steered by turning to the center.

  According to this steering carriage, the lever member can be arranged near the axle box, and the connecting link can be arranged at a relatively high position. That is, the lever member and the connecting link, which are constituent members of the link mechanism, can be arranged so as to avoid the vehicle longitudinal direction center portion of the bogie frame where other components and the like are easily arranged. Therefore, it is difficult for the link mechanism and other components to interfere with each other, and the degree of freedom in design can be improved.

  According to said structure, a link mechanism, another component, etc. cannot interfere easily, and a design freedom can be improved.

FIG. 1 is a left side view of the steering carriage according to the first embodiment. FIG. 2 is a right side view of the steering carriage according to the first embodiment. FIG. 3 is a horizontal sectional view of the shaft beam shown in FIG. FIG. 4 is a left side view of the steering carriage according to the second embodiment. FIG. 5 is a horizontal sectional view of the shaft beam shown in FIG. FIG. 6 is a left side view of the steering carriage according to the third embodiment. FIG. 7 is a left side view of the steering carriage according to the fourth embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. Below, the same code | symbol is attached | subjected to the element which is the same or it corresponds through all the drawings, and the overlapping description is abbreviate | omitted.

(First embodiment)
First, the steering cart 100 according to the first embodiment will be described. FIG. 1 is a left side view of the steering cart 100 according to the first embodiment, and FIG. 2 is a right side view of the steering cart 100 according to the first embodiment. In the following, the left side of FIG. 1 is “front” of the steering carriage 100, the right side of FIG. 1 is “rear” of the steering carriage 100, the front side of the page is “left” of the steering carriage 100, and the back of the page is “right” of the steering carriage 100 explain. In FIG. 2, the right side, left side, front side, and back side of the paper are the front, rear, right, and left of the steering carriage 100, respectively.

  The steering carriage 100 is disposed forward and rearward of the vehicle longitudinal direction center of the vehicle body 101, respectively. Both steering trolleys 100 have the same configuration, although the directions in the front-rear direction are opposite. Therefore, the steering cart 100 shown in FIGS. 1 and 2 will be described as being disposed ahead of the vehicle longitudinal center of the vehicle body 101. In FIG. 1, the right side of the paper is the vehicle longitudinal direction center side, and the left side of the paper is the vehicle longitudinal direction end (the same applies to FIGS. 4, 6, and 7). Hereinafter, the steering cart 100 disposed in front of the vehicle longitudinal center of the vehicle body 101 will be described, and description of the steering cart 100 disposed in the rear of the vehicle longitudinal center of the vehicle body 101 will be omitted (others). The same applies to the embodiment).

  As shown in FIGS. 1 and 2, the steering cart 100 is configured to be bilaterally symmetric, and includes a cart frame 10, a first wheel shaft 31, a second wheel shaft 32, a first axle box 41, and a second shaft. A box 42, a first axle box support device 51, a second axle box support device 52, and a link mechanism 70 are provided. Hereinafter, each of these components will be described in order.

<Dolly frame>
The carriage frame 10 has a pair of left and right side beams 11 extending along the longitudinal direction of the vehicle, and a lateral beam 12 extending along the vehicle width direction and connecting the left and right side beams 11. The steering cart 100 according to this embodiment is a cart with a so-called bolster (pillow beam), and includes a pillow beam 13 extending in the vehicle width direction. The horizontal beam 12 of the carriage frame 10 supports the pillow beam 13 via the support shaft 14 so as to be rotatable in the yawing direction. The pillow beam 13 supports the vehicle body 101 via an air spring 15 serving as a secondary suspension (the pillow beam 13 rotates together with the vehicle body 101). That is, the bogie frame 10 supports the vehicle body 101 via the pillow beam 13 so as to be rotatable in the yawing direction.

  The side beam 11 includes a side beam main body 16 having a vehicle longitudinal direction central portion depressed downward, and a first extension located below the side beam main body 16 and behind the vehicle longitudinal direction central portion of the side beam main body 16. And a second extending portion 18 located below the side beam main body 16 and on the front side of the central portion of the side beam main body 16 in the longitudinal direction of the vehicle. An L-shaped first support bracket 19 is provided at the lower end of the first extending portion 17. Furthermore, a second support bracket 20 is provided in a portion of the side beam body 16 that is above the second extending portion 18.

<Axle>
The first wheel shaft 31 is a wheel shaft located near the center in the longitudinal direction of the vehicle (the right side in the drawing), and the second wheel shaft 32 is a wheel shaft located near the end in the longitudinal direction of the vehicle (the left side in the drawing). The wheel shafts 32 are arranged so as to form a pair separated from each other in the longitudinal direction of the vehicle. Each of the first wheel shaft 31 and the second wheel shaft 32 has an axle 33 extending along the vehicle width direction, and wheels 34 provided on both left and right sides of the axle 33.

<Shaft box>
The first axle box 41 is disposed on both the left and right sides of the first wheel shaft 31 and accommodates bearings 43 that support the axle 33 of the first wheel shaft 31. The second axle box 42 is disposed on the left and right sides of the second wheel shaft 32 and accommodates bearings 43 that support the axle 33 of the second wheel shaft 32. The first axle box 41 supports the front end portion of the side beam 11 via a coil spring 44 that is a primary suspension, and the second axle box 42 is disposed behind the side beam 11 via a coil spring 44 that is also a primary suspension. Supports the end part.

<Shaft box support device>
The first axle box support device 51 is a device that supports the left and right first axle boxes 41, and includes a first axle beam 53 that extends from the first axle box 41 toward the vehicle longitudinal direction center of the carriage frame 10. . The second axle box support device 52 is a device that supports the left and right second axle boxes 42, and has a second axle beam 54 that extends from the second axle box 42 toward the vehicle longitudinal direction center of the carriage frame 10. .

  FIG. 3 is a cross-sectional view of the left first axial beam 53. In FIG. 3, the left side of the drawing is “left” of the steering vehicle 100, the right side of the drawing is “right” of the steering vehicle 100, the “front” of the steering vehicle 100 is on the drawing, and the “rear” of the steering vehicle 100 is below the drawing ( The same applies to FIG. 5).

  As shown in FIG. 3, the first shaft beam 53 includes a cart frame coupling portion 55 coupled to the cart frame 10 and a link coupling portion 56 coupled to the link mechanism 70. The carriage frame connecting portion 55 has an annular engaging portion 57 at the tip. The engaging portion 57 is formed so that the dimension in the vehicle width direction becomes smaller toward the center. The first extending portion 17 of the side beam 11 is provided with a rotating shaft 21 that penetrates the inside of the engaging portion 57. The rotating shaft 21 rotates around a rotating shaft extending in the vehicle width direction, and an outer peripheral groove 22 having a V-shaped cross section is formed.

  The elastic member 23 is inserted between the engaging portion 57 and the outer peripheral groove 22. The elastic member 23 has two annular portions 24 positioned between the side surface of the engaging portion 57 and the side surface of the outer peripheral groove 22. On the other hand, the elastic member 23 is not located between the inner front end of the engaging portion 57 and the bottom portion of the outer circumferential groove 22. Therefore, the engaging portion 57 is easily displaced in the vehicle longitudinal direction with respect to the outer circumferential groove 22, but is not easily displaced in the vehicle width direction. That is, the elastic member 23 is configured such that the allowable displacement in the vehicle width direction of the first shaft beam 53 with respect to the carriage frame 10 is smaller than the allowable displacement in the vehicle longitudinal direction.

  The elastic member 23 is not limited to the above configuration. For example, the elastic member 23 has a cylindrical shape, and a portion located between the side surface of the engaging portion 57 and the side surface of the outer peripheral groove 22 is made thin to make it difficult to deform, and You may comprise so that it may deform | transform easily by thickening the part located between an inner side front end and the bottom part of the outer periphery groove | channel 22. Even in this case, the allowable displacement in the vehicle width direction of the first shaft beam 53 with respect to the bogie frame 10 is smaller than the allowable displacement in the vehicle longitudinal direction.

  The link connecting portion 56 has a columnar connecting member 58 at the front end. The link connecting portion 56 is rotatably connected to a first lever member 72 of a link mechanism 70 described later via the connecting member 58. The connecting member 58 is disposed at a position offset to the outer side (left side) in the vehicle width direction than the elastic member 23 described above. Further, the connecting member 58 and the elastic member 23 are arranged so as to be concentric with each other. In other words, the connecting member 58 is concentric with the rotating shaft 21 and is disposed at a position offset in the vehicle width direction. Thereby, since the elastic member 23 can support the reaction force against the lateral pressure acting on the wheel 34 when passing the curve, the load generated in the link mechanism 70 can be suppressed.

  The configuration of the left first axial beam 53 is as described above. The first axial beam 53 on the right side has the same configuration as that of the left first axial beam 53 except for the left and right sides. The left second axial beam 54 is configured to be reversed in the front-rear direction with respect to the left first axial beam 53, but the other configuration is the same. However, the left second axial beam 54 is connected not to the first lever member 72 but to the second lever member 74. The right-side second axial beam 54 is configured to be opposite to the left-side second axial beam 54 in the left-right direction, but otherwise has the same configuration. As described above, structurally, the left and right first axial beams 53 are in a symmetrical relationship, and the first axial beam 53 and the second axial beam 54 are in a longitudinally symmetrical relationship. This point is the same in other embodiments described later.

<Link mechanism>
The link mechanism 70 is a mechanism that steers the first wheel shaft 31 and the second wheel shaft 32 in conjunction with the rotation of the carriage frame 10 with respect to the vehicle body 101. The link mechanism 70 of the present embodiment includes a first connecting link 71, a first lever member 72, a second connecting link 73, and a second lever member 74.

  The first connecting link 71 is rotatably connected to a first link receiver 75 provided at the rear end of the pillow beam 13 and extends rearward from the pillow beam 13 along the vehicle longitudinal direction. The first connecting link 71 is disposed closer to the vehicle longitudinal direction center of the carriage frame 10 than the first lever member 72 and is rotatably connected to the upper end portion of the first lever member 72.

  The first lever member 72 extends in the vertical direction, and is located closer to the first axle box 41 than the center in the vehicle longitudinal direction of the carriage frame 10. The first lever member 72 has a lower end supported rotatably by the first support bracket 19, and rotates around a first fulcrum portion 76 located below the axle 33. The first lever member 72 is connected to the link connecting portion 56 of the first shaft beam 53 at a portion between the upper end portion and the lower end portion.

  The second connecting link 73 is rotatably connected to a second link receiver 77 provided at the front end of the pillow beam 13, and extends forward from the pillow beam 13 along the longitudinal direction of the vehicle. The second connecting link 73 is disposed closer to the vehicle longitudinal direction center of the carriage frame 10 than the second lever member 74, and is rotatably connected to the upper end portion of the second lever member 74.

  The second lever member 74 extends in the vertical direction, and is disposed closer to the second axle box 42 than the center of the carriage frame 10 in the vehicle longitudinal direction. The lower end portion of the second lever member 74 is connected to the link connecting portion 56 of the second shaft beam 54. The portion between the upper end portion and the lower end portion of the second lever member 74 is rotatably supported by the second support bracket 20, and rotates around the second fulcrum portion 78 located above the axle 33.

<Steering operation>
Next, the steering operation by the steering cart 100 described above will be described. Here, a case where the railway vehicle passes the left curve will be described. As described above, the steering cart 100 is disposed in front of the vehicle longitudinal center of the vehicle body 101. When the railway vehicle passes the left curve, the steering carriage 100 rotates counterclockwise with respect to the vehicle body 101 (and the pillow beam 13) as viewed from above. Note that the rear steering cart 100 moves in the opposite direction to the front steering cart 100. That is, the rear steering cart 100 is rotated clockwise with respect to the vehicle body 101 when viewed from above, so that the front steering cart is inverted 180 °.

  At this time, in the link mechanism 70 on the left side shown in FIG. 1, the first connection link 71 and the second connection link 73 move forward with respect to the carriage frame 10 (see the arrow in FIG. 1). Accordingly, the first lever member 72 rotates counterclockwise in FIG. 1 and displaces the first wheel shaft 31 forward via the first shaft beam 53. Further, the second lever member 74 rotates counterclockwise and moves the second wheel shaft 32 backward via the second shaft beam 54. As a result, on the left side of the steering carriage 100, the first wheel shaft 31 and the second wheel shaft 32 approach each other.

  On the other hand, in the right link mechanism 70 shown in FIG. 2, the first connection link 71 and the second connection link 73 move rearward with respect to the carriage frame 10 (see the arrow in FIG. 2). Accordingly, the first lever member 72 rotates counterclockwise in FIG. 2 and displaces the first wheel shaft 31 rearward via the first shaft beam 53. Further, the second lever member 74 rotates counterclockwise and moves the second wheel shaft 32 forward via the second shaft beam 54. As a result, the first wheel shaft 31 and the second wheel shaft 32 are separated on the right side of the steering carriage 100.

  As described above, when the railway vehicle passes the left curve, the first wheel shaft 31 and the second wheel shaft 32 approach on the left side of the steering carriage 100 and separate on the right side. That is, the axles of the first wheel shaft 31 and the second wheel shaft 32 are inclined so as to face the center of the curve, respectively, thereby improving the curve passing performance of the railway vehicle.

  Note that both the first shaft beam 53 and the second shaft beam 54 are connected to the carriage frame 10 via the elastic member 23. Therefore, the first axial beam 53 and the second axial beam 54 can be displaced in the vehicle longitudinal direction with respect to the carriage frame 10. However, as described above, the elastic member 23 is configured such that the allowable displacement in the vehicle width direction of the first axial beam 53 and the second axial beam 54 with respect to the carriage frame 10 is smaller than the allowable displacement in the vehicle longitudinal direction. Has been. Therefore, the displacement of the first axial beam 53 and the second axial beam 54 with respect to the carriage frame 10 in the vehicle width direction is suppressed.

  Further, when the steering cart 100 passes the left curve, a centrifugal force in the right direction is applied to the wheel shafts 31 and 32 and the cart frame 10. At this time, the rightward movement of the respective wheel shafts 31 and 32 is suppressed by the rail. In the present embodiment, since the bogie frame 10 and the respective wheel shafts 31 and 32 are connected via the respective shaft beams 53 and 54, the rightward movement of the bogie frame 10 is performed via the respective shaft beams 53 and 54. Are suppressed by the respective wheel shafts 31 and 32. Therefore, according to the present embodiment, the cart frame 10 is not easily displaced in the vehicle width direction with respect to the respective wheel shafts 31 and 32, so that the link mechanism 70 positioned between the cart frame 10 and the respective wheel shafts 31 and 32 is large. The load is suppressed. Therefore, the link mechanism 70 can be formed in a lightweight and simple manner.

  Further, in the present embodiment, the first connecting link 71, the first lever member 72, the second connecting link 73, and the second lever member 74 constituting the link mechanism 70 avoid the central portion in the vehicle longitudinal direction of the carriage frame 10. Since it is arranged in this way, a space for arranging various devices and wirings can be secured in the central portion of the carriage frame 10 in the longitudinal direction of the vehicle, and design flexibility is improved.

(Second Embodiment)
Next, the steering cart 200 according to the second embodiment will be described. FIG. 4 is a left side view of the steering cart 200 according to the second embodiment, and FIG. 5 is a cross-sectional view of the first shaft beam 53 on the left side. The steering cart 200 according to the present embodiment is an inner frame cart and is different from the steering cart 100 according to the first embodiment in that it is a bolsterless cart. Other than that, it has basically the same configuration as the steering cart 100 according to the first embodiment.

  As described above, the steering cart 200 according to the present embodiment is a so-called inner frame cart, and the side beam 11, the first axle box 41, the second axle box 42, the first axle box support device 51, and the second axle box. The support device 52 is located on the inner side in the vehicle width direction than the wheels 34. Further, the link mechanism 70 is located on the inner side in the vehicle width direction than the side beam 11. Therefore, as shown in FIG. 5, the link connecting portion 56 connected to the link mechanism 70 is disposed at a position offset inward in the vehicle width direction with respect to the carriage frame connecting portion 55.

  Further, as described above, the steering cart 200 according to the present embodiment is a bolsterless cart that directly connects the cart frame 10 and the vehicle body 101 by the air spring 15, and does not include the pillow beam 13. Therefore, in this embodiment, the 1st connection link 71 and the 2nd connection link 73 are connected with the vehicle body 101 via the connection link receiving member 79 which protrudes below from the lower surface of the vehicle body 101. FIG. Although the steering cart 200 according to the present embodiment is configured as described above, the first wheel shaft 31 and the second wheel shaft 32 can be steered in the same manner as in the first embodiment, and the link mechanism 70 can be operated. It is possible to form the link mechanism 70 in a lightweight and simple manner by preventing a large load from being applied.

  In general, when a link mechanism is applied to the inner frame carriage, the cross beam and the link mechanism may interfere depending on the shape of the cross beam. However, in the present embodiment, the first connecting link 71, the first lever member 72, the second connecting link 73, and the second lever member 74 constituting the link mechanism 70 avoid the central portion in the vehicle longitudinal direction of the carriage frame 10. Thus, the link mechanism 70 does not interfere with the cross beam 12.

(Third embodiment)
Next, a steering cart 300 according to the third embodiment will be described. FIG. 6 is a left side view of the steering cart 300 according to the third embodiment. The steering cart 300 according to the present embodiment is different in configuration from the steering cart 100 according to the first embodiment in that it is a leaf spring cart. Other than that, it has basically the same configuration as the steering cart 100 according to the first embodiment.

  The steering carriage 300 according to the present embodiment includes a leaf spring 25 that supports the carriage frame 10. The leaf spring 25 is a member having the functions of the side beam 11 and the coil spring 44 described in the first embodiment, and extends in the longitudinal direction of the vehicle. The longitudinal end portions of the vehicle are the first axle box 41 and the second axle box. 42 is supported.

  Further, the bogie frame 10 of the present embodiment includes the cross beam 12 and the receiving seat 26. The cross beam 12 extends in the vehicle width direction, and both end portions in the vehicle width direction are supported by the leaf springs 25. The receiving seat 26 is a plate-like member disposed so as to face both sides of the left and right leaf springs 25 in the vehicle width direction, and the upper portion is fixed to the end portion of the cross beam 12 in the vehicle width direction.

  In this embodiment, the 1st support bracket 19 is provided in the lower end of the receiving seat 26, and supports the lower end part of the 1st lever member 72 so that rotation is possible similarly to 1st Embodiment. The second support bracket 20 is provided on the side surface of the receiving seat 26, and supports the second lever member 74 in a rotatable manner, as in the first embodiment. Further, the first shaft beam 53 and the second shaft beam 54 are connected to the rotating shaft 21 (see FIG. 3) provided so as to pass the receiving seat 26 facing each other via the elastic member 23.

Although the steering cart 300 according to the present embodiment is configured as described above, the first wheel shaft 31 and the second wheel shaft 32 can be steered and a large load is applied to the link mechanism 70 as in the case of the first embodiment. As a result, it is possible to form the link mechanism 70 in a lightweight and simple manner, and to secure a space in the central portion of the carriage frame 10 in the longitudinal direction of the vehicle, thereby improving the degree of freedom in design.

(Fourth embodiment)
Next, a steering cart 400 according to the fourth embodiment will be described. FIG. 7 is a left side view of the steering cart 400 according to the fourth embodiment. The steering cart 400 according to the present embodiment is an inner cart and is different from the steering cart 300 according to the third embodiment in that it is a bolsterless cart. Other than that, it has basically the same configuration as the steering cart 300 according to the third embodiment.

  As described above, the steering cart 400 according to the present embodiment is a so-called inner frame cart, and includes a leaf spring 25, a receiving seat 26, a first axle box 41, a second axle box 42, a first axle box support device 51, and The second axle box support device 52 is located on the inner side in the vehicle width direction than the wheels 34. Furthermore, the link mechanism 70 is located on the inner side in the vehicle width direction than the receiving seat 26. Therefore, the link connection part 56 is arrange | positioned in the position offset by the vehicle width direction inner side with respect to the trolley | bogie frame connection part 55 (refer FIG. 5).

  Further, as described above, the steering cart 400 according to the present embodiment is a bolsterless cart that directly connects the cart frame 10 and the vehicle body 101 by the air spring 15, and does not include the pillow beam 13. Therefore, in this embodiment, the 1st connection link 71 and the 2nd connection link 73 are connected with the vehicle body 101 via the connection link receiving member 79 which protrudes below from the lower surface of the vehicle body 101. FIG. Although the steering cart 400 according to the present embodiment is configured as described above, the first wheel shaft 31 and the second wheel shaft 32 can be steered in the same manner as in the first embodiment, and the link mechanism 70 can be A large load can be suppressed, and a space can be secured on the side portion of the carriage frame 10.

  The first to fourth embodiments have been described above. The steering carts 100 to 400 described above are configured to steer both the first wheel shaft 31 and the second wheel shaft 32, but may be configured to steer only one of them. Even in this case, one of the first wheel shaft 31 and the second wheel shaft 32 can be tilted toward the center of the curve, so that the curve passing performance can be improved.

(Effects etc.)
As described above, the steering bogie according to the embodiment includes a bogie frame that supports the vehicle body in a yawing direction with or without pillow beams, and an axle and an axle that extend along the vehicle width direction. A pair of wheel axles each having wheels provided on both sides and spaced apart in the longitudinal direction of the vehicle, an axle box that houses a bearing that supports each axle, and extending from the axle box via an elastic member An axle box support device having a shaft beam connected to the carriage frame, a link mechanism that steers at least one wheel shaft by displacing the axle box via the axle beam in conjunction with the rotation of the carriage frame with respect to the vehicle body, The link mechanism has a lever member disposed closer to the axle box than the center of the carriage frame in the vehicle longitudinal direction, and a connecting link disposed closer to the center of the carriage frame in the vehicle longitudinal direction than the lever member. The connecting link connects the pillow beam or the car body to the lever member. Binding, and lever member is coupled to the connecting link and Jikuhari, to steer the wheel shaft to rotate about the fulcrum portion supported by the bogie frame.

  Therefore, the lever member can be arranged closer to the axle box, and the connecting link can be arranged at a relatively high position. Therefore, since the distance from the fulcrum to the force point can be increased, the load acting on the link mechanism can be reduced and a simple structure can be achieved. Further, the lever member and the connecting link which are constituent members of the link mechanism can be arranged so as to avoid the vicinity of the center of the side portion of the carriage frame where other components and the like are easily arranged. For this reason, the link mechanism and other components are less likely to interfere with each other.

  Further, in the third embodiment and the fourth embodiment, there are provided leaf springs that extend in the longitudinal direction of the vehicle in a state in which both ends in the vehicle width direction of the carriage frame are supported, and that both ends in the longitudinal direction of the vehicle are supported by the axle box. . As described above, even if the steering cart is a leaf spring cart, the configuration of the link mechanism described above can be maintained. In this case, the link mechanism and other components are less likely to interfere with each other.

  Further, in the steering device according to the above-described embodiment, the pair of wheel shafts includes a first wheel shaft located near the vehicle longitudinal direction center of the vehicle and a second wheel shaft located near the vehicle longitudinal direction end of the vehicle. The link mechanism steers the first wheel shaft, the connection link extends along the longitudinal direction of the vehicle, the lever member extends along the vertical direction, and the upper end portion thereof is connected to the connection link, and the lower end thereof. The part is supported by the carriage frame as a fulcrum part, and is connected to the shaft beam corresponding to the first wheel shaft between the upper end part and the lower end part. By comprising in this way, the 1st wheel shaft located near the vehicle longitudinal direction center of a vehicle can be steered, producing said effect.

  Further, in the steering device according to the above-described embodiment, the pair of wheel shafts includes a first wheel shaft located near the vehicle longitudinal direction center of the vehicle and a second wheel shaft located near the vehicle longitudinal direction end of the vehicle. The link mechanism steers the second wheel shaft, the connection link extends along the longitudinal direction of the vehicle, the lever member extends along the vertical direction, and the upper end portion thereof is connected to the connection link, and the lower end thereof. The part is connected to the shaft beam corresponding to the second wheel shaft, and the part between the upper end part and the lower end part is supported by the carriage frame as a fulcrum part. By comprising in this way, the 2nd wheel axis located near the vehicle longitudinal direction edge part of a vehicle can be steered, producing said effect.

  Moreover, in 2nd Embodiment and 4th Embodiment, the link mechanism is arrange | positioned rather than the wheel at the vehicle width direction inner side. In this case, interference between the link mechanism and the cross beam becomes a problem. However, since the components of the link mechanism can be arranged so as to avoid the cross beam, the link mechanism and the cross beam do not interfere with each other. In addition, since there are no components on the outer side of the side beam in the vehicle width direction, the degree of freedom in designing the device arrangement is improved.

  In the above-described embodiment, the shaft beam is connected to the link mechanism via the connecting member, and the carriage frame is connected to the carriage frame so as to be rotatable around the rotation axis via the elastic member. A connecting portion, and the connecting member is disposed at a position concentric with the rotation shaft and offset in the vehicle width direction. That is, since the carriage frame and the axle are connected not only by the link mechanism but also by the shaft beam, the carriage frame is restrained from being displaced with respect to the wheel shaft, and the load applied to the link mechanism can be suppressed. Further, since the connecting member and the elastic member are arranged so as to be concentric with each other, the connection between the bogie frame and the axle by the shaft beam does not hinder the steering operation by the link mechanism.

10 bogie frame 13 pillow beam 23 elastic member 25 leaf spring 31 first wheel shaft 32 second wheel shaft 33 axle 34 wheel 41 first shaft box 42 second shaft box 43 bearing 51 first axle box support device 52 second axle box support device 53 First Axis Beam 54 Second Axis Beam 55 Bogie Frame Connection Portion 56 Link Connection Portion 58 Connection Member 70 Link Mechanism 71 First Connection Link 72 First Lever Member 73 Second Connection Link 74 Second Lever Member 76 First Support Point 78 Second fulcrum part 100, 200, 300, 400 Steering carriage 101

Claims (6)

A bogie frame that rotatably supports the vehicle body in the yawing direction with or without a pillow beam;
A pair of wheel shafts each having an axle extending along the vehicle width direction and wheels provided on both sides of the axle, and spaced apart in the vehicle longitudinal direction;
An axle box that houses a bearing that supports each axle;
An axle box support device having an axle beam extending from the axle box and connected to the carriage frame via an elastic member;
A link mechanism that steers at least one of the wheel shafts by displacing the axle box via the shaft beam in conjunction with the rotation of the bogie frame with respect to the vehicle body,
The link mechanism is
A lever member disposed closer to the axle box than the vehicle longitudinal center of the carriage frame, and a connecting link disposed closer to the vehicle longitudinal center of the carriage frame than the lever member;
The connecting link connects the pillow beam or the vehicle body and the lever member,
The lever member is connected to the connecting link and the shaft beam, and rotates around a fulcrum portion supported by the bogie frame to steer the wheel shaft. The steering carriage according to claim 1, further comprising a leaf spring that extends in the vehicle longitudinal direction while supporting both ends in the vehicle width direction of the carriage frame, and has both ends in the vehicle longitudinal direction supported by the axle box. The pair of wheel shafts includes a first wheel shaft located near the vehicle longitudinal direction center of the vehicle, and a second wheel shaft located near the vehicle longitudinal direction end of the vehicle,
The link mechanism steers the first axle;
The connecting link extends along the longitudinal direction of the vehicle,
The lever member extends in the vertical direction, and has an upper end connected to the connection link, a lower end supported by the carriage frame as the fulcrum, and the upper end and the lower end The steering cart according to claim 1, wherein the steering cart is connected to a shaft beam corresponding to the first wheel shaft. The pair of wheel shafts includes a first wheel shaft located near the vehicle longitudinal direction center of the vehicle, and a second wheel shaft located near the vehicle longitudinal direction end of the vehicle,
The link mechanism steers the second wheel axle,
The connecting link extends along the longitudinal direction of the vehicle,
The lever member extends in the vertical direction, and has an upper end connected to the connection link, a lower end connected to a shaft beam corresponding to the second wheel shaft, the upper end and the lower end, The steering cart according to claim 1 or 2, wherein a portion between the two is supported by the cart frame as the fulcrum portion.   The steering cart according to any one of claims 1 to 4, wherein the link mechanism is disposed on the inner side in the vehicle width direction than the wheels. The shaft beam includes a link connecting portion connected to the link mechanism via a connecting member, a cart frame connecting portion connected to the cart frame via the elastic member so as to be rotatable around a rotating shaft, Have
The steering cart according to any one of claims 1 to 5, wherein the connecting member is arranged at a position concentric with the rotation shaft and offset in a vehicle width direction.

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