Get-off structure and railway crane with same

Abstract

The utility model provides a getting-off structure and a railway crane with the same. The getting-off structure comprises a chassis, a chassis and a driving device, the two middle bottom frames are arranged below the bottom frame in a spaced mode in the longitudinal direction, and the two middle bottom frames are rotationally arranged around the vertical axes of the middle bottom frames relative to the bottom frame; the two pairs of bogies are arranged on the lower sides of the two middle underframes respectively, each pair of bogies is located at the two ends of the corresponding middle underframes in the longitudinal direction respectively, and the bogies are rotatably arranged around the vertical axes of the bogies relative to the middle underframes. According to the technical scheme provided by the invention, the problem that a railway crane in the related technology is difficult to pass through a curve path after the number of wheel sets is increased can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of railway cranes, in particular to an undercarriage structure and a railway crane having the same. Background Art

[0002] With the development of heavy-load railway trains, the axle weight of heavy-load trains has increased from 25t to 30t, and the weight of vehicles in heavy-load trains has increased a lot. At present, most large-tonnage railway cranes cannot meet the overall rescue needs of heavy-load trains. In order to meet the rescue needs of heavy-load trains, the lifting performance of railway cranes is required to be increased, which will inevitably increase the weight of the railway cranes themselves. When the number of axles remains unchanged, the axle weight of the axles will also increase, which will affect the bridge-crossing performance of railway cranes and may not be able to pass through some lines and bridges.

[0003] In the related art, a railway crane's undercarriage structure is provided with a bogie at both ends in the longitudinal direction, and the axles are arranged on the bogies in a transversely extending manner. By increasing the number of axles on the bogies and reducing the axle weight of a single axle, the railway crane's bridge crossing performance is improved.

[0004] However, since the lateral movement of the axle relative to the bogie is fixed (limited by the lateral movement of the bearings arranged between the axle and the bogie), and the longitudinal spacing between the axles is constant, the rotation angle of the bogie is limited. Therefore, the railway crane in the related art is not easy to pass through curved paths after the number of wheelsets increases. Utility Model Content

[0005] The utility model provides an undercarriage structure and a railway crane with the same, so as to solve the problem in the related art that the railway crane is difficult to pass through a curved path after the number of wheel pairs increases.

[0006] According to one aspect of the utility model, a disembarkation structure is provided, which includes: a chassis; two middle chassis, which are arranged below the chassis at intervals in the longitudinal direction, and the two middle chassis are rotatably arranged relative to the chassis around their vertical axes; two pairs of bogies, which are respectively arranged at the lower sides of the two middle chassis, each pair of bogies is respectively located at the two ends of the corresponding middle chassis in the longitudinal direction, and the bogies are rotatably arranged relative to the middle chassis around their vertical axes.

[0007] Furthermore, the getting-off structure also includes: a spherical center plate, the upper end of which is fixedly connected to the base frame, and the lower end of which is rotatably connected to the middle base frame around its center of sphere; two elastic side bearings, which are respectively arranged on both sides of the spherical center plate in the transverse direction, the upper ends of which are connected to the base frame, and the lower ends of which are abutted against the middle base frame.

[0008] Furthermore, the spherical center disk includes: a center shaft, having an upper shaft section and a lower shaft section, the upper end of the upper shaft section is connected to the base frame, the lower end of the upper shaft section is connected to the upper end of the lower shaft section, and the lower end of the lower shaft section is passed through the middle base frame; the shaft diameter of the upper shaft section is larger than the shaft diameter of the lower shaft section; a radial bearing and a thrust bearing, the inner ring of the radial bearing is sleeved on the upper shaft section, the inner ring of the thrust bearing is sleeved on the lower shaft section, the outer ring of the radial bearing and the outer ring of the thrust bearing are both arranged on the middle base frame, and the center of the radial bearing and the center of the thrust bearing are arranged to coincide.

[0009] Furthermore, the getting-off structure also includes: a cylindrical center plate, the upper end of the cylindrical center plate is fixedly connected to the middle base frame, and the lower end of the cylindrical center plate is rotatably connected to the bogie around its vertical axis; an upper side bearing is arranged on the lower side of the middle base frame, and the lower surface of the upper side bearing has a spherical depression that is concave upward; a lower side bearing is arranged on the upper side of the bogie corresponding to the upper side bearing, and the upper surface of the lower side bearing has a spherical protrusion that protrudes upward, the spherical protrusion extends into the spherical depression and cooperates with the spherical surface of the spherical depression, and the spherical protrusion is slidably arranged relative to the bogie along the rotation direction of the cylindrical center plate.

[0010] Furthermore, the lower side bearing includes: a lower side bearing seat, which is fixedly arranged on the upper side of the bogie, and the upper surface of the lower side bearing seat has a slide groove; a wear plate, which is detachably arranged in the slide groove; a pad, which is slidably arranged on the wear plate along the rotation direction of the cylindrical center plate, and the spherical protrusion is fixed on the side of the pad facing away from the wear plate.

[0011] Furthermore, the cylindrical center plate includes: a plate body, which is fixedly connected to the middle base frame, the plate body has a cylindrical platform protruding downward, the bogie is provided with a mounting groove, and the cylindrical platform can be rotatably extended into the mounting groove around its vertical axis; a center plate bolt, which is sequentially passed through the middle base frame, the cylindrical platform and the bogie; a center plate nut, which is sleeved on the center plate bolt and cooperates with the thread of the center plate bolt, and the center plate nut is located below the bogie.

[0012] Furthermore, each bogie is provided with at least three lower side bearings which are arranged at equal intervals in the circumferential direction of the cylindrical center plate, and the middle chassis is provided with at least three upper side bearings which are arranged in one-to-one correspondence with the at least three upper side bearings.

[0013] Furthermore, the getting-off structure also includes: two curve leveling parts, which are respectively arranged at the two ends of the chassis in the longitudinal direction, and the two curve leveling parts are both located on the lower side of the chassis, and the curve leveling parts are rotatable relative to the chassis around their longitudinal axes, and the two middle chassis are respectively arranged on the lower sides of the two curve leveling parts, and the middle chassis are rotatable relative to the curve leveling parts around their vertical axes.

[0014] Further, an upper protrusion extending in the transverse direction is provided in the middle of the middle chassis in the longitudinal direction, and the curve leveling member is provided between the upper protrusion and the chassis; and / or, a lower protrusion extending in the transverse direction is provided in the middle of the middle chassis in the longitudinal direction, and the lower protrusion is located between the two bogies of each pair of bogies.

[0015] Furthermore, the getting-off structure also includes a coupler, which is arranged on the bogie in each pair of bogies away from the center of the underframe, and the coupler is located at one end of the bogie away from the center of the underframe; and / or, the bogie has at least two wheel pairs, and the at least two wheel pairs are arranged on the lower side of the bogie at intervals along the longitudinal direction.

[0016] According to another aspect of the utility model, a railway crane is provided. The railway crane comprises an upper vehicle structure and an lower vehicle structure. The upper vehicle structure is arranged above the lower vehicle structure, and the lower vehicle structure is the lower vehicle structure provided above.

[0017] By applying the technical solution of the utility model, the undercarriage structure includes an underframe, two middle underframes and two pairs of bogies. Two middle underframes are arranged on the underframe, and the middle underframes are used to connect the pair of bogies. Since the two middle underframes are respectively rotatably arranged relative to the underframe around their vertical axes, compared with the technical solution of the prior art in which the bogies are directly arranged on the underframe, this embodiment uses the middle underframe to connect a pair of bogies, and uses a pair of bogies to arrange multiple axles (the number of the multiple axles is the same as the number of the multiple axles arranged on one bogie in the related art). The rotation of the middle underframe relative to the underframe can be utilized to enable relative lateral movement between the two bogies arranged on the same middle underframe, and the number of axles arranged on a single bogie is reduced, so that when the undercarriage structure passes through a curved path, the rotation angle requirement for the single bogie is reduced, which facilitates the undercarriage structure to pass through the curved path. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a vehicle disembarking structure provided according to an embodiment of the utility model is shown;

[0020] Figure 2 A structural schematic diagram showing another perspective of the undercarriage structure with the underframe removed according to an embodiment of the utility model is shown;

[0021] Figure 3 A structural schematic diagram showing another perspective of the undercarriage structure with the underframe removed according to an embodiment of the utility model is shown;

[0022] Figure 4A partial cross-sectional view of the vehicle disembarkation structure provided according to an embodiment of the utility model is shown;

[0023] Figure 5 A partial cross-sectional view from another perspective of the vehicle disembarkation structure provided according to an embodiment of the utility model is shown;

[0024] Figure 6 Shows Figure 5 A partial enlarged view of the middle A;

[0025] Figure 7 A top view of a bogie and a lower side bearing of an undercarriage structure provided according to an embodiment of the utility model is shown;

[0026] Figure 8 It shows a schematic structural diagram of a middle chassis, an upper side bearing and a cylindrical center plate of an undercarriage structure provided according to an embodiment of the utility model;

[0027] Fig. 9 A bottom view of the middle chassis, upper side bearings and cylindrical center plate of the undercarriage structure provided according to an embodiment of the utility model is shown;

[0028] Fig.10 A cross-sectional view of a middle chassis, an upper side bearing and a cylindrical center plate of an undercarriage structure provided according to an embodiment of the utility model is shown;

[0029] Fig.11 A cross-sectional view of an upper side bearing and a lower side bearing of an undercarriage structure provided according to an embodiment of the utility model is shown;

[0030] Fig.12 A structural schematic diagram of a railway crane provided according to an embodiment of the utility model is shown.

[0031] The above drawings include the following reference numerals:

[0032] 10. Base frame;

[0033] 20. Middle bottom frame; 21. Upper protrusion; 22. Lower protrusion;

[0034] 30. Bogie; 31. Mounting groove; 32. Coupler; 33. Wheel set;

[0035] 40. spherical center disk; 41. spindle; 411. upper shaft section; 412. lower shaft section; 42. radial bearing; 43. thrust bearing;

[0036] 50. Elastic side bearing;

[0037] 60. cylindrical core plate; 61. plate body; 611. cylindrical platform; 62. core plate bolt; 63. core plate nut;

[0038] 70, upper side bearing; 71, spherical depression;

[0039] 80, lower side bearing; 81, spherical protrusion; 82, lower side bearing seat; 821, slide groove; 83, wear plate; 84, pad;

[0040] 91. Curve leveling part; 92. Onboard structure; 93. Offboard structure. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0042] like Figures 1 to 11 As shown, an embodiment of the utility model provides an getting-off structure, which includes a base frame 10, two middle base frames 20 and two pairs of bogies 30. The two middle base frames 20 are longitudinally spaced apart and arranged below the base frame 10. The two middle base frames 20 are rotatably arranged relative to the base frame 10 around their vertical axes. The two pairs of bogies 30 are respectively arranged on the lower sides of the two middle base frames 20. Each pair of bogies 30 is respectively located at both ends of the corresponding middle base frame 20 in the longitudinal direction. The bogies 30 are rotatably arranged relative to the middle base frame 20 around their vertical axes.

[0043] The dismounting structure provided by the present embodiment includes a chassis 10, two middle chassis 20 and two pairs of bogies 30. Two middle chassis 20 are arranged on the chassis 10, and the middle chassis 20 is used to connect the pair of bogies 30. Since the two middle chassis 20 are respectively rotatably arranged relative to the chassis 10 around their vertical axes, compared with the technical solution of directly arranging the bogies on the chassis in the prior art, the present embodiment uses the middle chassis 20 to connect the pair of bogies 30, and uses the pair of bogies 30 to arrange multiple axles (the number of the multiple axles is the same as the number of the multiple axles arranged on one bogie in the related art). The rotation of the middle chassis 20 relative to the chassis 10 can be utilized to make the two bogies 30 arranged on the same middle chassis 20 move relative to each other in a lateral direction, and the number of axles arranged on a single bogie 30 is reduced, so that when the dismounting structure passes through a curved path, the rotation angle requirement for the single bogie 30 is reduced, which facilitates the dismounting structure to pass through the curved path.

[0044] Furthermore, the vehicle disembarking structure provided in this embodiment is simple in structure and easy to maintain.

[0045] like Figure 2 and Figure 3 As shown, the lowering structure further includes a spherical center plate 40 and two elastic side bearings 50. The upper end of the spherical center plate 40 is fixedly connected to the base frame 10, and the lower end of the spherical center plate 40 is rotatably connected to the middle base frame 20 around its spherical center. The two elastic side bearings 50 are respectively arranged on both sides of the spherical center plate 40 in the transverse direction. The upper end of the elastic side bearing 50 is connected to the base frame 10, and the lower end of the elastic side bearing 50 is in contact with the middle base frame 20. The base frame 10 transfers the vertical load to the middle base frame 20 through the spherical center plate 40. When the railway crane travels in a straight line at high speed, the lower end of the elastic side bearing 50 is in contact with the middle base frame 20 to provide a certain rotation resistance torque to suppress the serpentine motion. When the railway crane moves along a curve, the middle frame 20 rotates relative to the base frame 10 with the spherical center plate 40 as the rotation center, and the lower end of the elastic side bearing 50 slides with the middle frame 20 and provides a certain rotation resistance torque to ensure the lateral and longitudinal anti-overturning stability of the vehicle body and ensure that the railway crane passes the curve safely. The spherical center plate 40 is used to form a spherical degree of freedom between the base frame 10 and the middle frame 20 to prevent structural damage due to limited freedom when running on the line.

[0046] It should be noted that, in this embodiment, each middle base frame 20 is provided with a spherical center plate 40 and two elastic side bearings 50 .

[0047] like Figure 4 As shown, the spherical center disk 40 includes a spindle 41, a radial bearing 42 and a thrust bearing 43. The spindle 41 has an upper shaft section 411 and a lower shaft section 412. The upper end of the upper shaft section 411 is connected to the base frame 10, the lower end of the upper shaft section 411 is connected to the upper end of the lower shaft section 412, and the lower end of the lower shaft section 412 is inserted into the middle base frame 20. The shaft diameter of the upper shaft section 411 is larger than the shaft diameter of the lower shaft section 412. The inner ring of the radial bearing 42 is sleeved on the upper shaft section 411, and the inner ring of the thrust bearing 43 is sleeved on the lower shaft section 412. The outer rings of the radial bearing 42 and the outer rings of the thrust bearing 43 are both arranged on the middle base frame 20, and the center of the radial bearing 42 and the center of the thrust bearing 43 are arranged to coincide. The radial bearing 42 transmits longitudinal loads and transverse loads, and the thrust bearing 43 transmits vertical loads.

[0048] In this embodiment, both the radial bearing 42 and the thrust bearing 43 are maintenance-free self-lubricating bearings.

[0049] like Figures 5 to 11As shown, the getting-off structure also includes a cylindrical center plate 60, an upper side bearing 70 and a lower side bearing 80. The upper end of the cylindrical center plate 60 is fixedly connected to the middle chassis 20, and the lower end of the cylindrical center plate 60 is rotatably connected to the bogie 30 around its vertical axis. The upper side bearing 70 is arranged on the lower side of the middle chassis 20, and the lower surface of the upper side bearing 70 has a spherical depression 71 that is concave upward. The lower side bearing 80 is arranged on the upper side of the bogie 30 corresponding to the upper side bearing 70, and the upper surface of the lower side bearing 80 has a spherical protrusion 81 that protrudes upward. The spherical protrusion 81 extends into the spherical depression 71 and cooperates with the spherical surface of the spherical depression 71. The spherical protrusion 81 is slidably arranged relative to the bogie 30 along the rotation direction of the cylindrical center plate 60. The middle chassis 20 transfers the lateral load to the bogie 30 through the cylindrical center plate 60, and the middle chassis 20 transfers the vertical load to the bogie 30 through the cylindrical center plate 60, the upper side bearing 70 and the lower side bearing 80. When the railway crane travels along a straight line at high speed, the upper side bearing 70 and the lower side bearing 80 cooperate to provide a certain rotation resistance torque to suppress the serpentine motion of the vehicle. When the railway crane travels along a curve, the bogie 30 rotates relative to the middle chassis 20 with the cylindrical center plate 60 as the rotation center, and the spherical protrusion 81 slides relative to the bogie 30 along the rotation direction of the cylindrical center plate 60 to ensure that the vehicle passes the curve safely.

[0050] The spherical protrusion 81 and the spherical depression 71 have the same ball diameter, and the spherical protrusion 81 and the spherical depression 71 form a spherical degree of freedom, so that the middle chassis 20 and the bogie 30 are in closer contact.

[0051] like Figure 7 and Fig.11 As shown, the lower side bearing 80 includes a lower side bearing seat 82, a wear plate 83 and a pad 84. The lower side bearing seat 82 is fixedly arranged on the upper side of the bogie 30. The upper surface of the lower side bearing seat 82 has a slide groove 821. The wear plate 83 is detachably arranged in the slide groove 821. The pad 84 is slidably arranged on the wear plate 83 along the rotation direction of the cylindrical core plate 60. The spherical protrusion 81 is fixed on the side of the pad 84 away from the wear plate 83. When the railway crane travels along a curve, the bogie 30 rotates relative to the middle chassis 20 with the cylindrical core plate 60 as the rotation center. The spherical protrusion 81 drives the pad 84 to slide relative to the wear plate 83 along the rotation direction of the cylindrical core plate 60. The wear plate 83 is replaced regularly to maintain the reliability of the lower side bearing 80.

[0052] In this embodiment, the backing plate 84 is made of non-metallic material.

[0053] In this embodiment, the cylindrical center plate 60, the upper side bearing 70 and the lower side bearing seat 82 are all connected to the bogie 30 by bolts.

[0054] like Figure 6As shown, the cylindrical center disk 60 includes a disk body 61, a center disk bolt 62 and a center disk nut 63. The disk body 61 is fixedly connected to the middle base frame 20. The disk body 61 has a downwardly protruding cylindrical platform 611. The bogie 30 is provided with a mounting groove 31. The cylindrical platform 611 can be rotatably extended into the mounting groove 31 around its vertical axis. The center disk bolt 62 is sequentially penetrated through the middle base frame 20, the cylindrical platform 611 and the bogie 30. The center disk nut 63 is sleeved on the center disk bolt 62 and threadedly matched with the center disk bolt 62. The center disk nut 63 is located below the bogie 30. By rotatably extending the cylindrical platform 611 around its vertical axis into the installation groove 31, the installation and positioning between the cylindrical center plate 60 and the bogie 30 are facilitated to improve efficiency, and the center plate bolts 62 and the center plate nuts 63 are used to connect the middle frame 20, the cylindrical platform 611 and the bogie 30. When the railway crane is operating with its outriggers, the entire undercarriage structure can be lifted off the rail surface as a counterweight to improve the stability of the railway crane.

[0055] like Figures 7 to 10 As shown, each bogie 30 is provided with at least three lower side bearings 80 which are arranged at equal intervals in the circumferential direction of the cylindrical center plate 60, and the middle base frame 20 is provided with at least three upper side bearings 70 which are arranged one-to-one corresponding to the at least three upper side bearings 70, so as to disperse the load and improve the stress condition between the middle base frame 20 and the bogie 30, so that the middle base frame 20 can evenly distribute the vertical load to the bogie 30.

[0056] In this embodiment, the lowering structure further includes two curve leveling members 91, which are respectively arranged at both ends of the chassis 10 in the longitudinal direction, and are both located at the lower side of the chassis 10. The curve leveling members 91 are rotatably arranged relative to the chassis 10 around their longitudinal axes, and the two middle chassis 20 are respectively arranged at the lower sides of the two curve leveling members 91, and the middle chassis 20 are rotatably arranged relative to the curve leveling members 91 around their vertical axes. During the traveling of the railway crane, the curve leveling members 91 rotate relative to the chassis 10 around their longitudinal axes, thereby playing a buffering role when the traveling road surface is uneven, and improving the stability of the chassis 10.

[0057] like Figure 2 As shown, the middle chassis 20 is provided with an upper protrusion 21 extending in the transverse direction in the middle of the longitudinal direction, and the curved leveling member 91 is provided between the upper protrusion 21 and the chassis 10 to improve the structural strength of the middle chassis 20 in bearing vertical loads.

[0058] Specifically, the spherical center disk 40 and the two elastic side bearings 50 are disposed between the curve leveling member 91 and the upper protrusion 21 .

[0059] like Figure 2As shown, a lower protrusion 22 extending in the transverse direction is provided in the middle of the middle chassis 20 in the longitudinal direction, and the lower protrusion 22 is located between the two bogies 30 of each pair of bogies 30, which improves the structural strength of the middle chassis 20 and allows the middle chassis 20 and the bogies 30 to be installed compactly.

[0060] In this embodiment, the middle chassis 20 adopts a hollow box structure, which saves materials and reduces the overall weight.

[0061] like Figure 1 As shown, the undercarriage structure also includes a coupler 32, which is disposed on the bogie 30 of each pair of bogies 30 that is away from the center of the underframe 10, and the coupler 32 is located at one end of the bogie 30 that is away from the center of the underframe 10, so as to facilitate traction connection and transmission of longitudinal force to the undercarriage structure through the coupler 32.

[0062] like Figure 1 As shown, the bogie 30 has at least two wheel pairs 33, and the at least two wheel pairs 33 are arranged at intervals along the longitudinal direction on the lower side of the bogie 30. By adopting the at least two wheel pairs 33, by increasing the number of wheel pairs 33, when the vertical load of the undercarriage structure is constant, the requirements for the structural strength of a single wheel pair 33 can be reduced, and the weight of a single wheel pair 33 can be reduced. When the railway crane passes over a bridge, the pressure of the wheel pair 33 on the bridge can be reduced, thereby improving the bridge-passing performance of the railway crane.

[0063] In this embodiment, the transmission path of the vertical load is from the base frame 10 to the curve leveling member 91 , from the curve leveling member 91 to the middle base frame 20 , and from the middle base frame 20 to the bogie 30 .

[0064] like Figures 1 to 12 As shown, the embodiment of the utility model provides a railway crane, which includes an upper structure 92 and an lower structure 93. The upper structure 92 is arranged above the lower structure 93, and the lower structure 93 is the lower structure provided above. The railway crane provided by this embodiment is applied, two middle chassis 20 are arranged on the chassis 10, and a pair of bogies 30 are connected by the middle chassis 20. When the lower structure passes through a curved path, since the two middle chassis 20 are rotatably arranged relative to the chassis 10 around their vertical axes, this embodiment will also use the middle chassis 20 to share the lateral movement, reduce the rotation angle requirement of the single bogie 30, and thus facilitate the lower structure to pass through the curved path.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0067] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0068] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0069] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0070] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vehicle disembarking structure, characterized in that: The alighting structure comprises: Base frame (10); Two middle bottom frames (20) are arranged below the bottom frame (10) at intervals in the longitudinal direction, and the two middle bottom frames (20) are respectively arranged rotatably relative to the bottom frame (10) around their vertical axes; Two pairs of bogies (30) are respectively arranged on the lower sides of the two middle frames (20), and each pair of the bogies (30) is respectively located at the two ends of the corresponding middle frame (20) in the longitudinal direction, and the bogies (30) are rotatably arranged around their vertical axes relative to the middle frame (20).

2. The vehicle disembarkation structure according to claim 1, characterized in that: The alighting structure further comprises: A spherical center disk (40), the upper end of which is fixedly connected to the base frame (10), and the lower end of which is rotatably connected to the middle base frame (20) around its spherical center; Two elastic side bearings (50) are respectively arranged on both sides of the spherical center plate (40) in the transverse direction, the upper ends of the elastic side bearings (50) are connected to the base frame (10), and the lower ends of the elastic side bearings (50) are abutted against the middle base frame (20).

3. The vehicle disembarkation structure according to claim 2, characterized in that: The spherical core disk (40) comprises: The spindle (41) comprises an upper shaft section (411) and a lower shaft section (412); the upper end of the upper shaft section (411) is connected to the base frame (10), the lower end of the upper shaft section (411) is connected to the upper end of the lower shaft section (412), and the lower end of the lower shaft section (412) is passed through the middle base frame (20); the shaft diameter of the upper shaft section (411) is greater than the shaft diameter of the lower shaft section (412); A radial bearing (42) and a thrust bearing (43), wherein the inner ring of the radial bearing (42) is sleeved on the upper shaft section (411), and the inner ring of the thrust bearing (43) is sleeved on the lower shaft section (412); the outer ring of the radial bearing (42) and the outer ring of the thrust bearing (43) are both arranged on the middle chassis (20); and the center of the radial bearing (42) and the center of the thrust bearing (43) are arranged to coincide with each other.

4. The vehicle disembarkation structure according to claim 1, characterized in that: The alighting structure further comprises: A cylindrical core plate (60), wherein the upper end of the cylindrical core plate (60) is fixedly connected to the middle chassis (20), and the lower end of the cylindrical core plate (60) is rotatably connected to the bogie (30) around its vertical axis; An upper side bearing (70) is arranged on the lower side of the middle bottom frame (20), and the lower surface of the upper side bearing (70) has a spherical depression (71) that is concave upward; A lower side bearing (80) is arranged on the upper side of the bogie (30) corresponding to the upper side bearing (70), and the upper surface of the lower side bearing (80) has a spherical protrusion (81) protruding upward, and the spherical protrusion (81) extends into the spherical recess (71) and cooperates with the spherical surface of the spherical recess (71), and the spherical protrusion (81) is slidably arranged relative to the bogie (30) along the rotation direction of the cylindrical core plate (60).

5. The vehicle-getting-off structure according to claim 4, characterized in that: The lower side bearing (80) comprises: A lower side bearing seat (82) is fixedly arranged on the upper side of the bogie (30), and the upper surface of the lower side bearing seat (82) has a slide groove (821); A wear plate (83) detachably disposed in the slide groove (821); The backing plate (84) is slidably arranged on the wear plate (83) along the rotation direction of the cylindrical core disk (60), and the spherical protrusion (81) is fixed on the side of the backing plate (84) facing away from the wear plate (83).

6. The vehicle-getting-off structure according to claim 4, characterized in that: The cylindrical core disk (60) comprises: A disc body (61) is fixedly connected to the middle chassis (20), the disc body (61) has a cylindrical platform (611) protruding downward, the bogie (30) is provided with a mounting groove (31), and the cylindrical platform (611) is rotatably extended into the mounting groove (31) around its vertical axis; The center plate bolt (62) is sequentially passed through the middle frame (20), the cylindrical platform (611) and the bogie (30); The center plate nut (63) is sleeved on the center plate bolt (62) and threadably matched with the center plate bolt (62). The center plate nut (63) is located below the bogie (30).

7. The vehicle-getting-off structure according to claim 4, characterized in that: Each bogie (30) is provided with at least three lower side bearings (80) arranged at equal intervals in the circumferential direction of the cylindrical center plate (60), and the middle chassis (20) is provided with at least three upper side bearings (70) arranged in one-to-one correspondence with the at least three upper side bearings (70).

8. The vehicle-getting-off structure according to claim 1, characterized in that: The dismounting structure further comprises: two curve leveling members (91), the two curve leveling members (91) are respectively arranged at two ends of the base frame (10) in the longitudinal direction, the two curve leveling members (91) are both located at the lower side of the base frame (10), the curve leveling members (91) are rotatably arranged relative to the base frame (10) around their longitudinal axes, and the two middle base frames (20) are respectively arranged at the lower sides of the two curve leveling members (91), and the middle base frames (20) are rotatably arranged relative to the curve leveling members (91) around their vertical axes.

9. The vehicle-getting-off structure according to claim 8, characterized in that: The middle chassis (20) is provided with an upper protrusion (21) extending in a transverse direction at the middle portion in the longitudinal direction, and the curve leveling member (91) is provided between the upper protrusion (21) and the chassis (10); and / or, The middle chassis (20) is provided with a lower protrusion (22) extending in the transverse direction at the middle portion in the longitudinal direction, and the lower protrusion (22) is located between the two bogies (30) of each pair of bogies (30).

10. The vehicle-getting-off structure according to claim 1, characterized in that: The lowering structure further comprises a coupler (32), wherein the coupler (32) is arranged on the bogie (30) in each pair of the bogies (30) which is away from the center of the underframe (10), and the coupler (32) is located at one end of the bogie (30) which is away from the center of the underframe (10); and / or, The bogie (30) has at least two wheel pairs (33), and the at least two wheel pairs (33) are arranged on the lower side of the bogie (30) at intervals along the longitudinal direction.

11. A railway crane, characterized in that: The railway crane comprises an upper vehicle structure (92) and an lower vehicle structure (93), wherein the upper vehicle structure (92) is arranged above the lower vehicle structure (93), and the lower vehicle structure (93) is the lower vehicle structure according to any one of claims 1 to 10.

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