AU2021429319B2 - Middle beam of flatcar and flatcar with middle beam - Google Patents

Abstract

A middle beam (40) of a flatcar, and a flatcar having same. The middle beam (40) of the flatcar comprises: a first lower cover plate (10); a first upper cover plate (20) provided opposite to the first lower cover plate (10); and a first web plate (30), wherein the first web plate is provided between the first upper cover plate (20) and the first lower cover plate (10) so as to connect the first upper cover plate (20) and the first lower cover plate (10), and a thickness value of the first lower cover plate (10) is greater than a thickness value of the first upper cover plate (20). The middle beam (40) can effectively solve the problem in the prior art that the deadweight of the flatcar is small.

Description

Middle Beam of Flatcar and Flatcar with Middle Beam

Cross-Reference to Related Application

The disclosure claims the priority to Chinese Patent Application No. CN202110217803.2, filed to the Chinese Patent Office on February 26, 2021 and entitled "Middle Beam of Flatcar and Flatcar with Middle Beam", which is incorporated herein in its entirety by reference.

Technical Field

The present invention relates to the field of railway transportation, in particular to a middle beam of a flatcar and the flatcar having same.

Background

Against the background of adjustment to national economic structure and emergence of network economy, society-wide transportation structure of cargo has embraced drastic change recently, and demand for transportation of high value-added bulk cargo represented by mails and parcels has surged. Serving as a primary railway vehicle in railway logistics, railway flatcars are mainly applied to cargo transport through cooperation with containers. With high efficiency, low cost, convenient multimodal transportation, less cargo damage, door-to-door transportation, etc., advanced container transportation has taken a leading role in modern logistics and multimodal transportation, and has been widely adopted by countries throughout the world.

At present, middle beams function as key bearing structures for the flatcars, and are generally made of section steel, particularly thick metal plates in the prior art, for high supporting capacity and strength, resulting in their large dead weights as well as increase in dead weights of the flatcars. Since the maximum transportation power of the flatcars is fixed, the greater the dead weights of the flatcar are, the smaller the maximum cargo carrying capacity is. The existing middle beam structures of the flatcars are likely to cause excessive dead weights as well as smaller maximum carrying capacity of the flatcars and to influence transportation efficiency of the flatcars.

Summary

A main objective of the present invention is to provide a middle beam of a flatcar and a flatcar with the middle beam for solving the problem of small carrying capacity of a flatcar in related technologies.

In order to achieve the above objective, according to one aspect of the present invention, a middle beam of a flatcar is provided and includes: a first lower cover plate; a first upper cover plate arranged opposite the first lower cover plate; and a first web plate arranged between the first upper cover plate and the first lower cover plate, so as to connect the first upper cover plate with the first lower cover plate; where a thickness of the first lower cover plate is greater than a thickness of the first upper cover plate.

In some embodiments, a thickness of the first web plate falls between the thickness of the first lower cover plate and the thickness of the first upper cover plate.

In some embodiments, a ratio of the thickness of the first lower cover plate to the thickness of the first upper cover plate falls within 0.75-0.5, and/or a ratio of the thickness of the first lower cover plate to the thickness of the first web plate falls within 0.4-0.56.

In some embodiments, the first web plate is provided with a lightening hole.

In some embodiments, a plurality of the first web plates are provided, the plurality of first web plates are arranged at intervals in a width direction of the first lower cover plate.

In some embodiments, the first upper cover plate includes a first upper cover plate body and a plurality of first fender groups, the first fender groups are arranged at intervals in a length direction of the first upper cover plate body, each first fender group includes two first fenders which are oppositely arranged, the two first fenders in each first fender group are arranged on two opposite longer sides of the first upper cover plate body respectively, and the first fenders and the first upper cover plate body are made of a whole metal plate; the first lower cover plate includes a first lower cover plate body and a plurality of second fender groups, the second fender groups are arranged at intervals in the length direction of the first upper cover plate body, each second fender group includes two second fenders which are oppositely arranged, the two second fenders in each second fender group are arranged on two opposite longer sides of the first lower cover body respectively, and the second fenders and the first lower cover body are made of a whole metal plate; and the second fenders are in one-to-one correspondence with the first fenders.

According to another aspect of the present invention, a flatcar is provided and includes: a middle beam, where the middle beam is the middle beam above; and crossmembers arranged at two ends in a width direction of the middle beam.

In some embodiments, the crossmember includes a second upper cover plate, a second lower cover plate and second web plates arranged between the second upper cover plate and the second lower cover plate, the second web plates connect the second upper cover plate to the second lower cover plate, the second upper cover plate is connected with the first upper cover plate of the middle beam, and the second lower cover plate is connected with the first lower cover plate of the middle beam.

In some embodiments, a thickness of the second lower cover plate is greater than a thickness of the second upper cover plate, and the thickness of the second upper cover plate is greater than a thickness of the second web plate.

In some embodiments, the crossmember is provided with locking structures, the plurality of locking structures are arranged at intervals in a length direction of the middle beam, the plurality of locking structures have a plurality of combination forms, the plurality of locking structures are formed into a plurality of locking structure pairs in any combination form, each locking structure pair includes two locking structures, a distance between two locking structures in each locking structure pair is consistent, and a distance between two locking structures of each locking structure pair in any combination form varies.

In some embodiments, the crossmember is provided with locking structures, the plurality of locking structures are arranged at intervals in a length direction of the middle beam, the plurality of locking structures have a plurality of combination forms, the plurality of locking structures are formed into a plurality of locking structure pairs in any combination form, each locking structure pair includes two locking structures, a distance between two locking structures of at least one locking structure pair among the plurality of locking structure pairs is not equal to a distance between two locking structures of another locking structure pair, and locking seat portions corresponding to each locking structure pair do not overlap each other.

In some embodiments, the crossmember is provided with a locking structure, and the locking structure includes two mounting holes arranged on two sides in a width direction of the middle beam respectively.

In some embodiments, the crossmembers include a first crossmember and a second crossmember, wherein the first crossmember is arranged at an end of the middle beam, the second crossmember is arranged at a middle of the middle beam, the first crossmember and the middle beam form a Chinese character "El" structure, and the second crossmember and the middle beam form a cross structure.

According to another aspect of the present invention, a flatcar is provided and includes a middle beam, wherein the middle beam is the middle beam above, crossmembers arranged at two ends in a width direction of the middle beam, wherein each of the crossmembers includes a second upper cover plate, a second lower cover plate and a second web plate arranged between the second upper cover plate and the second lower cover plate, the second web plate connects the second upper cover plate to the second lower cover plate, the second upper cover plate is connected with a first fender of the middle beam, and the second lower cover plate is connected with a second fender of the middle beam.

By applying a technical solution of the present invention, the middle beam is optimized in structure, and the middle beam includes the first upper cover plate, the first lower cover plate and the first web plate. The first upper cover plate of the middle beam is used to bear a container, the first lower cover plate may bear weights of the whole middle beam and the container, and the first web plate is arranged between the first lower cover plate and the first upper cover plate, and mainly plays a role in connection between the first upper cover plate and the first lower cover plate. Since the first upper cover plate merely bears the weight of the container, and the first lower cover plate bears the weights of the container and the whole middle beam, the first lower cover plate is made of a thicker metal plate, and the first upper cover plate is made of a metal plate thinner than that for the first lower cover plate, thus avoiding use of the thicker metal plate in all structures of the middle beam. The above structure uses the design concept of equal strength, and metal plates with different thicknesses are used to machine corresponding structures according to the stress situation of each structure of the middle beam, thus avoiding use of thicker metal plates for a structure with less stress. On one hand, production cost is saved, and on the other hand, a dead weight of the flatcar is effectively reduced, and strength of the middle beam may be guaranteed as well.

Brief Description of the Drawings

Accompanying drawings constituting a part of the disclosure are used for providing further understanding of the present invention. Schematic embodiments of the present invention and descriptions thereof are used to explain the present invention but not constitute an improper limit to the present invention. In the accompanying drawings:

Fig. 1 shows a schematic diagram of a solid structure of an embodiment of a middle beam of a flatcar according to the present invention;

Fig. 2 shows a schematic diagram of a solid structure of an embodiment of a flatcar according to the present invention; and

Fig. 3 shows a front view of the flatcar of Fig. 2.

The accompanying drawings include the following reference numerals:

10. first lower cover plate; 11. first lower cover plate body; 12. second fender; 20. first upper cover plate; 21. first upper cover plate body; 22. first fender; 30. first web plate; 31. lightening hole; 40. middle beam; 50. crossmember; 51. second upper cover plate; 52. second lower cover plate; 53. second web plate; 60. locking structure; 70. second crossmember; and 80. first crossmember.

Detailed Description of the Embodiments

It should be noted that embodiments in the disclosure and features therein may be combined with one another if there is no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

As shown in Fig. 1, a middle beam of a flatcar of the disclosure includes: a first lower cover plate 10, a first upper cover plate 20 and a first web plate 30. The first upper cover plate 20 is arranged opposite the first lower cover plate 10. The first web plate 30 is arranged between the first upper cover plate 20 and the first lower cover plate 10, so as to connect the first upper cover plate 20 with the first lower cover plate 10. A thickness of the first lower cover plate 10 is greater than a thickness of the first upper cover plate 20.

By applying a technical solution of this embodiment, the middle beam is optimized in structure, and the middle beam includes the first upper cover plate 20, the first lower cover plate 10 and the first web plate 30. The first upper cover plate 20 of the middle beam is used to bear a container, the first lower cover plate 10 may bear weights of the whole middle beam and the container, and the first web plate 30 is arranged between the first lower cover plate 10 and the first upper cover plate 20, and mainly plays a role in connection between the first upper cover plate 20 and the first lower cover plate 10. Since the first upper cover plate 20 merely bears the weight of the container, and the first lower cover plate 10 bears the weights of the container and the whole middle beam, the first lower cover plate 10 is made of a thicker metal plate, and the first upper cover plate 20 is made of a metal plate thinner than that for the first lower cover plate 10, thus avoiding use of the thicker metal plate in all structures of the middle beam, and reducing a dead weight of the middle beam. In the above structure, structure of the middle beam is optimized, and metal plates with different thicknesses are used to machine corresponding structures according to the stress situation of each structure of the middle beam, thus avoiding use of thicker metal plates for a structure with less stress. On one hand, production cost is saved, and on the other hand, a dead weight of the flatcar is effectively reduced, and strength of the middle beam may be guaranteed as well.

As shown in Fig. 1, in this embodiment, a plurality of the first web plates 30 are provided, the plurality of first web plates 30 are arranged at intervals in a width direction of the first lower cover plate 10, and a thickness of the first web plate 30 falls between the thickness of the first lower cover plate 10 and the thickness of the first upper cover plate 20. In the above structure, the first web plate 30 is arranged between the first lower cover plate 10 and the first upper cover plate 20, an upper end face of the first web plate 30 is welded to the first upper cover plate 20, and a lower end face of the first web plate 30 is welded to the first lower cover plate 10. The plurality of first web plates 30 are arranged at intervals, so as to provide uniform support force for the first upper cover plate 20, and make the first upper cover plate 20 stably support cargo such as containers. Since the plurality of first web plates 30 are arranged, gravity of the first upper cover plate 20 and the cargo such as containers may be shared. The first web plate 30 is made of a metal plate which is thinner than the first lower cover plate 10 and thicker than the first upper cover plate 20, so as to reduce the weight of the middle beam as much as possible on the basis of guarantee of the support strength of the middle beam, then reduce the dead weight of the flatcar and increase the cargo carrying capacity of the flatcar.

It should be noted that in this embodiment, two first web plates 30 are arranged, and the first web plate 30, the first lower cover plate 10 and the first upper cover plate 20 may define a box-shaped structure, which may improve the bearing capacity of the middle beam. Tests show that the larger a cross section of the defined box structure, the higher the strength of the middle beam is, and the better the bearing effect is.

Specifically, in this embodiment, the ratio of the thickness of the first lower cover plate 10 to the thickness of the first upper cover plate 20 falls within 0.75-0.5. The above structure may guarantee that while the first lower cover plate 10 provides sufficient supporting force for the cargo, the dead weight of the first lower cover plate 10 is reduced as much as possible. If the ratio of the thickness of the first lower cover plate 10 to the thickness of the first upper cover plate 20is too large, the first upper cover plate 20 may have excessive strength, which may increase the dead weight and the production cost. If the ratio of the thickness of the first lower cover plate 10 to the thickness of the first upper cover plate 20 is too small, the first upper cover plate 20 has too low strength, and is likely to deform during cargo carrying.

In this embodiment, the ratio of the thickness of the first lower cover plate 10 to the thickness of the first web plate 30 falls within 0.4-0.56. The above structure may guarantee that while the first web plate 30 provides sufficient supporting force for the cargo, the dead weight of the first web plate 30 is reduced as much as possible. If the ratio of the thickness of the first lower cover plate 10 to the thickness of the first web plate 30 is too large, the first upper cover plate 30 may have excessive strength, which may increase the dead weight and the production cost. If the ratio of the thickness of the first lower cover plate 10 to the thickness of the first web plate 30 is too small, the first upper cover plate 30 may have too low strength, and is likely to deform during cargo carrying.

Preferably, the ratio of the thickness of the first lower cover plate 10 to the thickness of the first web plate 30 to the thickness of the first upper cover plate 20 is 1:0.75:0.5.

As shown in Fig. 1, in this embodiment, the first web plate 30 is provided with a lightening hole 31. The above structure may further reduce the dead weight of the middle beam and increase the cargo carrying capacity of the flatcar.

As shown in Fig. 1, in this embodiment, the first upper cover plate 20 includes a first upper cover plate body 21 and a plurality of first fender groups, the first fender groups are arranged at intervals in a length direction of the first upper cover plate body 21, each first fender group includes two first fenders 22 which are oppositely arranged, the two first fenders 22 in each first fender group are arranged on two opposite longer sides of the first upper cover plate body 21 respectively, and the first fenders 22 and the first upper cover plate body 21 are made of a whole metal plate; the first lower cover plate 10 includes a first lower cover plate body 11 and a plurality of second fender groups, the second fender groups are arranged at intervals in a length direction of the first lower cover plate body 11, each second fender group includes two second fenders 12 which are oppositely arranged, the two second fenders 12 in each second fender group are arranged on two opposite longer sides of the first lower cover body 11 respectively, and the second fenders 12 and the first lower cover body 11 are made of a whole metal plate; and the second fenders 12 are in one-to-one correspondence with the first fenders 22. In the above structure, the first fender 22 and the second fender 12 arranged in one-to-one correspondence are used for being connected with the crossmember of the flatcar. If the first fender 22 and the second fender 12 are omitted, the crossmember may be directly connected to edges of the first upper cover plate 20 and the first lower cover plate 10. In this case, excessive stress at a joint between the crossmember and the middle beam may be caused due to large stress at a portion of abrupt change of shape, and after the cargo is placed on the flatcar, the joint between the crossmember and the middle beam is likely to suffer shear force, resulting in twisting of the crossmember and deformation of the flatcar. The first fender 22 protruding from the first upper cover plate body 21 and the second fender 12 protruding from the first lower cover plate body 11 are arranged in the above structure, such that the crossmember is connected to the first fender 22 and the first fender 22 at a portion rather than junctions between the first fender 22 and the first upper cover plate body 21 and between the second fender 12 and the first lower cover plate body 11 where the stress is most likely to concentrate, fatigue strength of the joint between the crossmember and the middle beam is improved, and the probability of deformation of the crossmember is reduced.

Specifically, in this embodiment, a width of the first fender 22 falls within 100 mm-200 mm. In the above structure, if the width of the first fender 22 is too small, the joint between the crossmember and the first fender 22 may be close to a stress concentration position, and the probability of deformation of the crossmember may be high. If the width of the first fender 22 is too large, an area of a machined portion of the first upper cover plate 20 may be too large, resulting in waste of metal plates for producing the first upper cover plate 20 and increasing the production cost.

Correspondingly, a width of the second fender 12 falls within 100 mm-200 mm. In the above structure, if the width of the second fender 12 is too small, the joint between the crossmember and the second fender 12 may be close to a stress concentration position, and the probability of deformation of the crossmember may be high. If the width of the second fender 12 is too large, an area of a machined portion of the first lower cover plate 10 may be too large, resulting in waste of metal plates for producing the first lower cover plate 10 and increasing the production cost.

As shown in Fig. 1, in this embodiment, a joint between the first fender 22 and the first upper cover plate body 21 has a rounded corner. The above structure may prevent stress at the joint between the first fender 22 and the first upper cover plate body 21 from being too concentrated, thereby improving strength of the joint between the first fender 22 and the first upper cover plate body 21 and reducing the probability of deformation at the joint between the first fender 22 and the first upper cover plate body 21.

Correspondingly, a joint between the second fender 12 and the first lower cover plate body 11 has a rounded corner. The above structure may prevent stress at the joint between the second fender 12 and the first lower cover plate body 11 from being too concentrated, thereby improving strength of the joint between the second fender 12 and the first lower cover plate body 11 and reducing the probability of deformation of the joint between the second fender 12 and the first lower cover plate body 11.

As shown in Figs. 2 to 3, the disclosure further provides a flatcar, and the flatcar according to the embodiment of the disclosure includes a middle beam 40 and crossmembers 50. The middle beam 40 is the above middle beam, and the crossmembers 50 are arranged at two ends in a width direction of the middle beam 40. In the above structure, because the middle beam 40 has the advantage of a low dead weight, the flatcar having same also has the above advantage.

As shown in Fig. 2, in this embodiment, the crossmember 50 includes a second upper cover plate 51, a second lower cover plate 52 and a plurality of second web plates 53 arranged between the second upper cover plate 51 and the second lower cover plate 52, the second web plates 53 connect the second upper cover plate 51 with the second lower cover plate 52, the second upper cover plate 51 is connected with the first upper cover plate 20 of the middle beam 40, and the second lower cover plate 52 is connected with the first lower cover plate 10 of the middle beam 40.

In the above structure, the crossmember 50 may be connected with the middle beam to share a load of a container. The second upper cover plate 51, the second lower cover plate 52 and the second web plate 53 of the crossmember 50 are connected with the middle beam 40, so as to improve connection strength between the crossmember 50 and the middle beam 40, reduce the probability of deformation of a joint between the middle beam 40 and the crossmember 50, and prolong service life of the flatcar.

As shown in Fig. 2, in this embodiment, a thickness of the second lower cover plate 52 is greater than that of the second upper cover plate 51, and the thickness of the second upper cover plate 51 is greater than that of the second web plate 53. In the above structure, because the second upper cover plate 51 needs to bear the load of the container, and the second lower cover plate 52 needs to bear the load of the container and a load of the whole crossmember 50, the second lower cover plate 52 is made of a thickest metal plate, and the second upper cover plate 51 is made of a metal plate thinner than that of the second lower cover plate 52. In this way, stress distribution of the crossmember 50 is reasonably considered, and the second upper cover plate 51 is prevented from being made of the metal plate as thick as that of the second lower cover plate 52, thus reducing a dead weight of the crossmember 50 and increasing carrying capacity of the flatcar. In addition, since the plurality of second web plates 53 are arranged, the second web plates 53 may share pressure from the second upper cover plate 51, the second web plate 53 is made of a metal plate thinner than that of the second upper cover plate 51, which may further reduce the dead weight of the crossmember 50 and increase the carrying capacity of the flatcar.

It is certain that in other embodiments not shown in the figure, the thickness of the second upper cover plate 51 may be equal to that of the second web plate 53.

It should be noted that the ratio of the thickness of the second lower cover plate 52 to the thickness of the second upper cover plate 51 to the thickness of the second web plate 53 is preferably 1:0.75:0.5. The thickness of the second lower cover plate 52 of the crossmember 50 is smaller than that of the first lower cover plate 10 of the middle beam 40. The thickness of the second upper cover plate 51 of the crossmember 50 is smaller than that of the first upper cover plate 20 of the middle beam 40. The thickness of the second web plate 53 of the crossmember 50 is smaller than that of the first web plate 30 of the middle beam 40.

As shown in Fig. 2, in this embodiment, the crossmember 50 is provided with locking structures 60, the plurality of locking structures 60 are arranged at intervals in a length direction of the middle beam 40, the plurality of locking structures 60 have a plurality of combination forms, and the plurality of locking structures 60 are formed into a plurality of locking structure pairs in any combination form. It should be noted that the flatcar of the disclosure is a special flatcar for 50 feet railway containers. The flatcar of the disclosure is mainly used for containers of 10 feet, 20 feet, 25 feet, 40 feet, 45 feet and 48 feet. Specifically, in this embodiment, a locking structure pair fits containers with the same size. When a distance between the locking structure pair is 11985 mm, the locking structure pair fits containers with international standard sizes of 40 feet, 45 feet and 48 feet. When a distance between the locking structure pair is 5853 mm, the locking structure pair fits containers with international standard sizes of 20 feet. When a distance between the locking structure pair is 2787 mm, the locking structure pair fits containers with international standard sizes of 10 feet. In the above structure, the plurality of locking structures 60 are arranged, and the plurality of locking structures 60 have various combination forms, thereby meeting various container loading working conditions of flatcars.

Specifically, in this embodiment, each locking structure pair includes two locking structures 60, the distance between two locking structures 60 in each locking structure pair is consistent, and the distance between two locking structures 60 of each locking structure pair in any combination form varies. The combination forms include a first combination form. In the first combination form, locking seat portions corresponding to at least two locking structure pairs do not overlap each other. In the above structure, when the locking structure 60 applies the first combination form, the locking structure may be involved in the following working conditions: 1. two 20-feet containers are loaded at 5853-typed locking seat positions at two ends of the flatcar, specifically with four combination loading working conditions; and 2. five 10-feet containers are loaded at five 2787-typed locking seat positions.

As shown in Fig. 2, in this embodiment, each locking structure pair includes two locking structures 60, the distance between two locking structures 60 in each locking structure pair is consistent, and the distance between two locking structures 60 of each locking structure pair in any combination form varies. The combination forms also include a second combination form. In the second combination form, locking seat portions corresponding to each locking structure pair overlap each other partially, and the distance between the two locking structures 60 of the locking structure pair in the first combination form is smaller than that between the two locking structures 60 of the locking structure pair. In the above structure, when the locking structure 60 applies the second combination form, the locking structure may be involved in the following working conditions: 1. a 40 feet or 45 feet or 48 feet container is loaded at 11985-typed locking seat positions, with two loading working conditions; and 2. a 20 feet container is loaded in the middle, at 5853-typed locking seat positions, with two loading working conditions.

As shown in Fig. 2, in this embodiment, the crossmember 50 is provided with the locking structures 60, the plurality of locking structures 60 are arranged at intervals in the length direction of the middle beam 40, the plurality of locking structures 60 have the plurality of combination forms, the plurality of locking structures 60 are formed into a plurality of locking structure pairs in any combination form, each locking structure pair includes two locking structures 60, a distance between two locking structures 60 of at least one locking structure pair among the plurality of locking structure pairs is not equal to a distance between two locking structures 60 of another locking structure pair, and locking seat portions corresponding to each locking structure pair do not overlap each other. In this embodiment, when the locking structure 60 applies the above combination form, the locking structure may be involved in the following working conditions: 1. two 20 feet containers are loaded at two ends, and one 10 feet container is loaded in the middle; 2. one 40 feet container and one 10 feet container are loaded at the 2787-typed and 11985-typed locking seat positions, at one end, with two loading working conditions; and 3. three 10 feet containers and one 20 feet container are loaded, with one end loaded with one 20 feet container before loading three 10 feet containers, with two combination loading working conditions.

It should be noted that the same locking structure 60 may apply many different combination forms.

As shown in Fig. 2, in this embodiment, the crossmember 50 is provided with the locking structure 60, and the locking structure 60 includes two mounting holes arranged on two sides in a width direction of the middle beam 40 respectively. The structure is simple, and the mounting hole conveniently cooperate with a mounting protrusion on the container, such that the container may be stably connected to the flatcar.

As shown in Fig. 2 and Fig. 3, in this embodiment, the crossmembers 50 include a first crossmember 80 and a second crossmember 70, wherein the first crossmember 80 is arranged at an end of the middle beam 40, the second crossmember 70 is arranged at a middle of the middle beam 40, the first crossmember 80 and the middle beam 40 form a Chinese character "El" structure, and the second crossmember 70 and the middle beam 40 form a cross structure. In the above structure, the second crossmember 70 and the middle beam 40 form the cross structure, so as to increase a contact area between the flatcar and the container, and to place the container on the flatcar more stably. In the above structure, the first crossmember 80 and the middle beam 40 form the Chinese character "El" structure, so as to further increase the contact area between the flatcar and the container, and to place the container on the flatcar stably.

It should be noted that the first crossmember 80 and the middle beam 40 form the Chinese character "El" structure, such that the locking structures 60 may be densely arranged on the first crossmember 80, thus adapting to various working conditions of container loading.

As shown in Fig 2, the disclosure further provides a flatcar, and the flatcar according to the embodiment of the disclosure includes a middle beam 40 and crossmembers 50. The middle beam 40 is the middle beam above, crossmembers 50 are arranged at two ends in a width direction of the middle beam 40, the crossmember 50 includes a second upper cover plate 51, a second lower cover plate 52 and a second web plate 53 arranged between the second upper cover plate 51 and the second lower cover plate 52, the second web plate 53 connects the second upper cover plate 51 with the second lower cover plate 52, the second upper cover plate 51 is connected with a first fender 22 of the middle beam 40, and the second lower cover plate 52 is connected with a second fender 12 of the middle beam 40. In the above structure, the second lower cover plate 52 of the crossmember 50 is welded to the second fender 12 of the middle beam 40, and the second upper cover plate 51 of the crossmember 50 is welded to the first fender 22 of the middle beam 40. In this way, a joint between the crossmember 50 and the middle beam 40 does not overlap a junction between the first fender 22 and the first upper cover plate body 21 and the junction between the second fender 12 and the first upper cover plate body 21, where stress is most likely to concentrate, fatigue strength of the joint between the crossmember and the middle beam is improved, and the probability of deformation of the crossmember is reduced.

It should be noted that, in order to further improve the connection strength of the crossmember 50, the second web plate 53 may be welded to the first web plate 30 of the crossmember 50, so as to further improve the connection strength between the crossmember 50 and the middle beam 40 and prevent the crossmember 50 from being deformed.

What is described above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can be variously modified and changed. Any modification, equivalent substitutions and improvements, etc. made within the spirit and principles of the present invention are intended to fall within the scope of protection of the present invention.

Claims (12)

Claims

1. A middle beam of a flatcar, comprising:

a first lower cover plate (10);

a first upper cover plate (20) arranged opposite the first lower cover plate (10); and

a first web plate (30) arranged between the first upper cover plate (20) and the first lower cover plate (10), so as to connect the first upper cover plate (20) with the first lower cover plate (10), the first web plate (30) is a metal plate;

wherein a thickness of the first lower cover plate (10) is greater than a thickness of the first upper cover plate (20), a plurality of the first web plates (30) are provided, the plurality of first web plates (30) are arranged at intervals in a width direction of the first lower cover plate (10), and a thickness of the first web plate (30) falls between the thickness of the first lower cover plate (10) and the thickness of the first upper cover plate (20).

2. The middle beam as claimed in claim 1, wherein a ratio of the thickness of the first upper cover plate (20) to the thickness of the first lower cover plate (10) falls within 0.75-0.5, and/or a ratio of the thickness of the first web plate (30) to the thickness of the first lower cover plate (10) falls within 0.4-0.56.

3. The middle beam as claimed in claim 1, wherein the first web plate (30) is provided with a lightening hole (31).

4. The middle beam as claimed in claim 1, wherein the first upper cover plate (20) comprises a first upper cover plate body (21) and a plurality of first fender groups, the first fender groups are arranged at intervals in a length direction of the first upper cover plate body (21), each of the plurality of first fender groups comprises two first fenders (22) which are oppositely arranged, the two first fenders (22) in each first fender group are arranged on two opposite longer sides of the first upper cover plate body (21) respectively, and the first fenders (22) and the first upper cover plate body (21) are made of a whole metal plate; the first lower cover plate (10) comprises a first lower cover plate body (11) and a plurality of second fender groups, the second fender groups are arranged at intervals in a length direction of the first lower cover plate body (11), each of the plurality of second fender groups comprises two second fenders (12) which are oppositely arranged, the two second fenders (12) in each second fender group are arranged on two opposite longer sides of the first lower cover body (11) respectively, and the second fenders (12) and the first lower cover plate body (11) are made of a whole metal plate; and the second fenders (12) are in one-to-one correspondence with the first fenders (22).

5. A flatcar, comprising:

the middle beam (40)as claimed in any one of claims 1-4; and

crossmembers (50) arranged at two ends in a width direction of the middle beam (40).

6. The flatcar as claimed in claim 5, wherein the crossmember (50) comprises a second upper cover plate (51), a second lower cover plate (52) and a plurality of second web plates (53) arranged between the second upper cover plate (51) and the second lower cover plate (52), the second web plates (53) connect the second upper cover plate (51) with the second lower cover plate (52), the second upper cover plate (51) is connected with the first upper cover plate (20) of the middle beam (40), and the second lower cover plate (52) is connected with the first lower cover plate (10) of the middle beam (40).

7. The flatcar as claimed in claim 6, wherein a thickness of the second lower cover plate (52) is greater than a thickness of the second upper cover plate (51), and the thickness of the second upper cover plate (51) is greater than or equal to a thickness of the second web plate (53).

8. The flatcar as claimed in claim 5, wherein the crossmember (50) is provided with a plurality of locking structures (60), the plurality of locking structures (60) are arranged at intervals in a length direction of the middle beam (40), the plurality of locking structures (60) have a plurality of combination forms, the plurality of locking structures (60) are formed into a plurality of locking structure pairs in any combination form, each of locking structure pairs comprises two locking structures (60), a distance between two locking structures (60) of each locking structure pair is consistent, and a distance between two locking structures (60) of each locking structure pair in any combination form varies.

9. The flatcar as claimed in claim 5, wherein the crossmember (50) is provided with a plurality of locking structures (60), the plurality of locking structures (60) are arranged at intervals in a length direction of the middle beam (40), the plurality of locking structures (60) have a plurality of combination forms, the plurality of locking structures (60) are formed into a plurality of locking structure pairs in any combination form, each locking structure pair comprises two locking structures (60), a distance between two locking structures (60) of at least one locking structure pair among the plurality of locking structure pairs is not equal to a distance between two locking structures (60) of another locking structure pair, and locking seat portions corresponding to each locking structure pair do not overlap each other.

10. The flatcar as claimed in claim 5, wherein the crossmember (50) is provided with a locking structure (60), and the locking structure (60) comprises two mounting holes arranged on two sides in a width direction of the middle beam (40) respectively.

11. The flatcar as claimed in claim 5, wherein the crossmembers (50) comprise a first crossmember (80) and a second crossmember (70), wherein the first crossmember (80) is arranged at an end of the middle beam (40), the second crossmember (70) is arranged at a middle of the middle beam (40), the first crossmember (80) and the middle beam (40) form a Chinese character "El" structure, and the second crossmember (70) and the middle beam (40) form a cross structure.

12. A flatcar, comprising:

the middle beam (40)as claimed in claim 4; and crossmembers (50) arranged at two ends in a width direction of the middle beam (40), wherein each of the crossmembers (50) comprises a second upper cover plate (51), a second lower cover plate (52) and a second web plate (53) arranged between the second upper cover plate (51) and the second lower cover plate (52), the second web plate (53) connects the second upper cover plate (51) with the second lower cover plate (52), the second upper cover plate (51) is connected with a first fender (22) of the middle beam (40), and the second lower cover plate (52) is connected with a second fender (12) of the middle beam (40).

? 22 21

11 12 31 30 10

Fig.1 Fig.1

1/3 1/3 least

52 53

51

12

50 702

Fig.2 Fig.2

40 no

BESO

60

50

80

2/3

70 31 20 10 30 80

Fig.3 Fig.3

3/3 3/3