Secondary suspension device, bogie and locomotive

Abstract

The invention provides a secondary suspension device, a bogie and a locomotive, a first spring element group and a second spring element group of the secondary suspension device are symmetrically arranged on a framework, and the first spring element group and the second spring element group are arranged between the framework and a supporting beam in the elastic force direction of springs; the first connecting piece and the second connecting piece are symmetrically hung at the two ends of the supporting beam, the upper ends of the first connecting piece and the second connecting piece are hinged to the two ends of the supporting beam respectively, and the lower ends of the first connecting piece and the second connecting piece are hinged to edge beams on the lower portion of the side edge of a vehicle body respectively. A supporting beam is additionally arranged above a first spring element set and a second spring element set which are symmetrically arranged on a framework of the bogie of the secondary suspension device, and edge beams on the lower portion of the side edge of a vehicle body are hung at the two ends of the supporting beam through a first connecting piece and a second connecting piece. And the transverse rigidity of the secondary suspension is reduced, and the transverse stability of the locomotive is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of suspension devices, and particularly relates to a secondary suspension device, a bogie and a locomotive. Background Art

[0002] When a locomotive is running, the lateral ride quality, that is, the ability to maintain the stability of the car body relative to the track and resist lateral sway, is crucial for improving passenger comfort and driving safety. For locomotives with suspended drive axles, due to the large self-weight of the locomotive car body and its installed equipment, the use of air springs with low lateral stiffness is restricted, and the use of air springs will greatly increase the workload of inspection and maintenance. At present, the spring components used in the secondary suspension device have a large lateral stiffness, which restricts the improvement of its lateral ride quality. Therefore, it is necessary to innovate the design of the spring components in the secondary suspension device to reduce the lateral stiffness of the secondary suspension and improve the lateral performance of the locomotive. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a secondary suspension device to reduce the lateral stiffness and improve the lateral ride quality of the locomotive.

[0004] The secondary suspension device provided by the present invention includes a first spring element group, a second spring element group, a frame, a support beam, a first connecting member and a second connecting member;

[0005] The first spring element group and the second spring element group are symmetrically arranged on the frame; along the spring force direction, the lower ends of the first spring element group and the second spring element group are respectively connected to the two side longitudinal beams of the frame, and the upper ends of the first spring element group and the second spring element group are respectively connected to the lower side surface of the support beam;

[0006] The first connecting member and the second connecting member are symmetrically suspended at both ends of the support beam; along the vertical direction, the upper ends of the first connecting member and the second connecting member are respectively hinged to both ends of the support beam, and the lower ends of the first connecting member and the second connecting member are respectively hinged to the lower part of the side of the car body.

[0007] In the above solution, a support beam is added above the first spring element group and the second spring element group symmetrically arranged on the frame of the secondary suspension device bogie, and the side beams at the lower part of the side of the car body are hung at both ends of the support beam through the first connecting member and the second connecting member. Since there is a swing freedom in the connecting member between the car body and the support beam, the lateral stiffness of the secondary suspension is reduced, and the lateral ride quality of the locomotive is improved.

[0008] Furthermore, side beams are symmetrically arranged at the lower parts of both sides of the car body, and the lower ends of the first connecting member and the second connecting member are respectively hinged to the side beams; the cross-section of the side beam is L-shaped. The side beams improve the connection strength between the secondary suspension device and the car body.

[0009] Furthermore, both the first spring element group and the second spring element group include at least two spring elements, and the spring elements include helical coil springs. The helical coil springs have sufficient vertical stiffness to meet the use scenarios with large loads. At the same time, more than two helical coil springs enable the support beam thereon to have better stability.

[0010] Furthermore, both the first spring element group and the second spring element group include at least one spring element, and the spring elements include rubber stacks. The rubber stacks are selected as the spring elements according to different vertical stiffness requirements.

[0011] Furthermore, elastic connection bodies are provided at the upper end and / or the lower end of the first connecting member and the second connecting member, and the elastic connection bodies include rubber joints. The deflection flexibility of the elastic connection bodies plays a role in shock absorption and reducing the lateral stiffness when the secondary suspension device is working and undergoes torsion.

[0012] Furthermore, the first connecting member and the second connecting member include I-shaped bars, and both ends of the I-shaped bars have relatively large stress intensities.

[0013] On the other hand, the present invention also provides a bogie, and this bogie includes the above-mentioned secondary suspension device.

[0014] On the other hand, the present invention also provides a locomotive, and this locomotive is provided with the above-mentioned bogie.

[0015] The present invention has the following beneficial effects:

[0016] 1) Compared with the traditional locomotive secondary suspension device, the secondary suspension device provided by the present invention adds a support beam above the secondary springs, and the connection method changes from directly connecting the springs to the car body in the traditional way to connecting the springs to the support beam and then connecting to the car body. Through the free swing of the first connecting member and the second connecting member between the car body and the support beam, the lateral stiffness of the secondary suspension device is greatly reduced. The connection method of this secondary suspension device has both relatively large vertical stiffness and relatively small lateral stiffness, achieving excellent lateral stability of the locomotive.

[0017] 2) The secondary suspension device provided by the present invention is provided with side beams at the lower parts of the two sides of the car body, and the lower ends of the first connecting member and the second connecting member are connected to the side beams, improving the connection strength between the secondary suspension device and the car body.

[0018] 3) The secondary suspension device provided by the present invention selects helical coil springs or rubber stacks as the spring elements of the first spring element group and the second spring element group according to different vertical stiffness requirements to cope with different load use scenarios.

[0019] 4) In the secondary suspension device provided by the present invention, the first connecting member and the second connecting member are hinged by an elastic connecting member, and the elastic connecting member is twisted when the secondary suspension device works, further reducing the vibration impact and lateral stiffness during the operation of the locomotive. Description of the Drawings

[0020] Figure 1 is the front view of the secondary suspension device provided by some embodiments of the present invention,

[0021] Figure 2 is the left view of the secondary suspension device provided by some embodiments of the present invention.

[0022] Description of the Reference Numerals:

[0023] 010 Car body,

[0024] 011 Side beam,

[0025] 100 First spring element group,

[0026] 200 Second spring element group,

[0027] 300 Frame,

[0028] 310 Longitudinal beam,

[0029] 400 Support beam,

[0030] 500 First connecting member,

[0031] 510 Elastic joint,

[0032] 600 Second connecting member,

[0033] 610 Elastic joint. Detailed Embodiments

[0034] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of this invention herein are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] As Figure 1 and Figure 2 As shown, the present invention provides a secondary suspension device, including a first spring element group 100, a second spring element group 200, a frame 300, a support beam 400, a first connecting member 500 and a second connecting member 600, as well as other necessary components such as secondary vertical dampers and secondary lateral dampers. Among them, the first spring element group 100 and the second spring element group 200 each include at least two spring elements. The spring elements are used to absorb and disperse the vibration and impact of the vehicle and can meet the design requirements of the locomotive flexibility coefficient. The spring elements can be selected from helical coil springs or rubber mounts. The helical coil springs or rubber mounts have a relatively large vertical stiffness and meet the requirement that the locomotive flexibility coefficient ≤ 0.225.

[0038] In a specific embodiment, as Figure 2 shown, the first spring element group 100 and the second spring element group 200 are respectively composed of two steel helical coil springs. Optionally, according to the load requirements, the first spring element group 100 and the second spring element group 200 can also respectively include three spring elements, or four spring elements, or even more spring elements; the first spring element group 100 and the second spring element group 200 are symmetrically arranged on the frame 300; along the spring elastic force direction, the lower ends of the steel helical coil springs are respectively connected to the two side longitudinal beams 310 of the frame 300, and the upper ends of the steel helical coil springs are respectively connected to the lower side surface of the support beam 400.

[0039] As Figure 1As shown, the first connecting member 500 and the second connecting member 600 are symmetrically suspended at both ends of the support beam 400; the first connecting member 500 and the second connecting member 600 are two-force members, and the first connecting member 500 and the second connecting member 600 are preferably I-shaped bars. The two ends of the I-shaped bar are wider, increasing the stress intensity at both ends of the two-force member; in the vertical direction, the upper ends of the two I-shaped bars are respectively hinged to both ends of the support beam 400, and the lower ends of the two I-shaped bars are respectively hinged to the side beam 011 at the lower part of the side of the car body 010, playing a role of a suspension rod between the support beam and the car body, as Figure 1 shown, the cross-section of the side beam 011 is L-shaped. The L-shaped side beam 011 is symmetrically arranged at the lower part of the side of the car body 010. The lower ends of the first connecting member 500 and the second connecting member 600 are connected to the side beam 011. The L-shaped side beam 011 improves the connection strength between the secondary suspension device and the car body 010.

[0040] In order to buffer and absorb shock, elastic connectors 510, 610 that can withstand both radial or axial loads and torsional or torsional pendulum loads can be used between the two I-shaped bars and the car body 010 and the support beam 400 for hinge connection, which can play a role in shock absorption and noise reduction in addition to realizing the free swing function of the I-shaped bar. The elastic connectors 510, 610 are joint components that bear both linear acting forces and torques, and sliding or rolling bearings and rubber joints composed of rubber and iron parts can be selected. Exemplarily: the elastic connectors 510, 610 are rubber joints. The rubber joints include cylindrical ring rubber joints and spherical rubber joints. The cylindrical ring rubber joints can mainly withstand radial or axial loads, and at the same time withstand torsional or a little torsional load; the spherical rubber joints can withstand both radial or axial loads and torsional and torsional pendulum loads. The elastic connectors 510, 610 include the following optional settings: the upper ends of the two suspension rods are hinge-connected by rubber joints; or, the lower ends of the two suspension rods are hinge-connected by rubber joints; the elastic connectors 510, 610 that do not use rubber joints can be spherical hinges containing rubber pads or other hinge components containing buffer pads. In a preferred embodiment, the elastic connectors 510, 610 at the upper and lower ends of the two suspension rods are both hinge-connected by rubber joints.

[0041] In the present invention, a support beam 400 is added above the first spring element group 100 and the second spring element group 200 symmetrically arranged on the frame 300 of the secondary suspension device bogie. The side beam 011 at the lower part of the side of the car body 010 is suspended by suspension rods at both ends of the support beam 400. Since there is a swing freedom for the suspension rods between the car body 010 and the support beam 400, the lateral stiffness of the secondary suspension is reduced, the lateral stability of the locomotive is improved, and the lateral sway of the locomotive during high-speed operation can be reduced, so as to meet higher running speed requirements. The double-ended selection of elastic connectors for the first connecting member 500 and the second connecting member 600 further reduces the vibration and impact during the operation of the locomotive.

[0042] On the other hand, the present invention also provides a bogie, which comprises the above-mentioned secondary suspension device.

[0043] On the other hand, the present invention also provides a locomotive, which is provided with the above-mentioned bogie.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A secondary suspension device, characterized in that, It includes a first spring element group (100), a second spring element group (200), a frame (300), a support beam (400), a first connecting member (500) and a second connecting member (600); The first spring element group (100) and the second spring element group (200) are symmetrically arranged on the frame (300); along the spring elastic force direction, the lower ends of the first spring element group (100) and the second spring element group (200) are respectively connected to the two side longitudinal beams (310) of the frame (300), and the upper ends of the first spring element group (100) and the second spring element group (200) are respectively connected to the lower side surface of the support beam (400); The first connecting member (500) and the second connecting member (600) are symmetrically suspended at both ends of the support beam (400); along the vertical direction, the upper ends of the first connecting member (500) and the second connecting member (600) are respectively hinged to both ends of the support beam (400), and the lower ends of the first connecting member (500) and the second connecting member (600) are respectively hinged to the lower parts of the two side edges of the vehicle body (010).

2. The secondary suspension device according to claim 1, characterized in that, Side beams (011) are symmetrically arranged at the lower parts of the two side edges of the vehicle body (010), and the lower ends of the first connecting member (500) and the second connecting member (600) are respectively hinged to the side beams (011); the cross section of the side beam (011) is L-shaped.

3. The secondary suspension device according to claim 1, characterized in that Both the first spring element group (100) and the second spring element group (200) include at least two spring elements, and the spring element includes a spiral coil spring.

4. The secondary suspension device according to claim 1, characterized in that, Both the first spring element group (100) and the second spring element group (200) include at least one spring element, and the spring element includes a rubber stack.

5. The secondary suspension device according to claim 1, characterized in that, Elastic connectors (510, 610) are arranged at the upper end and / or the lower end of the first connecting member (500) and the second connecting member (600), and the elastic connectors (510, 610) include rubber joints.

6. The secondary suspension device according to claim 1, characterized in that, The first connecting member (500) and the second connecting member (600) include I-shaped rods.

7. Bogie, characterized in that, It includes a secondary suspension device according to any one of claims 1-6.

8. A locomotive, characterized in that, A bogie is provided according to claim 7.

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