CN214145344U

CN214145344U - Truss, scaling ladder and lower longitudinal beam

Info

Publication number: CN214145344U
Application number: CN202022912691.6U
Authority: CN
Inventors: 晏培杰
Original assignee: Suzhou Yichuangte Intelligent Manufacturing Co ltd
Current assignee: Suzhou Yichuangte Intelligent Manufacturing Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-09-07
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses a truss, scaling ladder and longeron down. The truss comprises two lower longitudinal beams and a plurality of first connecting pieces, each lower longitudinal beam comprises a first main body with a first cavity, a first limiting part and a second limiting part, each first main body is provided with a first end wall connected with the corresponding first limiting part, one end of each first limiting part is connected with the corresponding first end wall of the corresponding first main body, the other end of each first limiting part extends in the direction away from the corresponding first main body and is connected with the corresponding second limiting part, each second limiting part is provided with a second end wall oppositely arranged with the corresponding first end wall of the corresponding first main body, the first end walls of the corresponding first main bodies, the second end walls of the corresponding first limiting parts and the second end walls of the corresponding second limiting parts form first sliding grooves in a surrounding mode, the corresponding first main bodies, the corresponding first limiting parts and the corresponding second limiting parts are integrally formed by rolled steel, and the plurality of first connecting pieces are used for connecting the two lower longitudinal beams, so that the first sliding grooves of the two lower longitudinal beams are oppositely arranged to form a first sliding way. The scheme can reduce the types of the raw materials, reduce the stock pressure of the raw materials, simplify the processing procedures and the like.

Description

Truss, scaling ladder and lower longitudinal beam

Technical Field

The utility model relates to a roll-in section bar technical field, specific is a truss, scaling ladder and longeron down.

Background

The aerial ladder fire truck is provided with a hydraulic lifting platform for fire fighters to ascend to rescue high-rise buildings, tall facilities, oil tanks and other fires, rescue trapped personnel, rescue valuable goods and materials and complete other rescue tasks. The vehicle is provided with a telescopic aerial ladder which can be provided with a lifting bucket turntable and a fire extinguishing device, so that fire fighters can ascend to extinguish fire and rescue trapped people, and the vehicle is suitable for fighting fire of high-rise buildings.

At present, the telescopic ladder frame is generally formed by sequentially nesting and combining four to six trusses, each truss can slide along a slideway of the truss at the outer stage of the truss, and the cross sections of the trusses are gradually reduced from outside to inside. In a common truss for an aerial ladder, an upper longitudinal beam and a lower longitudinal beam (especially a lower longitudinal beam with a complex structure) are mostly made of solid aluminum alloy profiled bars, and the truss made of the solid aluminum alloy profiled bars has the defects of high processing cost, low strength and rigidity and the like. Some trusses can also be formed by welding traditional angle steels, open cold-formed steel, steel plates and the like in a splicing manner, although the strength and the rigidity of the trusses can be improved, the trusses are formed by welding various different types of steel in a splicing manner, the process is complex, the processing cost is high, the production efficiency is low, and the welding working environment is poor.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the embodiment of the utility model provides a truss, aerial ladder and longeron down, it is used for solving at least one in the above-mentioned problem.

The embodiment of the application discloses: a truss comprises two lower longitudinal beams and a plurality of first connecting pieces, wherein each lower longitudinal beam comprises a first main body with a first cavity, a first limiting part and a second limiting part, the first main body is provided with a first end wall connected with the first limiting part, one end of the first limiting part is connected with the first end wall of the first main body, the other end of the first limiting part extends along the direction deviating from the first main body and is connected with the second limiting part, the second limiting part is provided with a second end wall oppositely arranged with the first end wall of the first main body, a first chute is formed by the first end wall of the first main body, the first limiting part and the second end wall of the second limiting part in a surrounding manner, the first main body, the first limiting part and the second limiting part are integrally formed by steel, and the plurality of first connecting pieces are used for connecting two lower longitudinal beams which are oppositely arranged, so that the first sliding grooves of the two lower longitudinal beams are oppositely arranged to form a first sliding way.

Specifically, first spacing portion will first main part is divided into first portion and second portion, first portion correspond first endwall be used for with first spacing portion with the spacing portion of second encloses and constitutes first spout, the second portion correspond first endwall be used for installing the second connecting piece and/or form sliding connection portion.

Specifically, the second position-limiting part is provided with a second cavity, the cross section of the second position-limiting part perpendicular to the long axis direction of the second position-limiting part is triangular, and the second end wall of the second position-limiting part is the side of the triangle.

Specifically, the side sill further comprises a first connecting portion integrally formed with the first main body in a rolling mode, the first connecting portion and the first sliding groove are located on the same side of the first main body, and the first connecting portion is used for being connected with the first connecting piece.

Specifically, the first connection portion has a third cavity.

Specifically, the truss further comprises two upper longitudinal beams and a plurality of second connecting members, one of the upper longitudinal beams is connected with one of the lower longitudinal beams through a part of the second connecting members, and the other of the upper longitudinal beams is connected with the other of the lower longitudinal beams through the other part of the second connecting members.

Specifically, go up the longeron and include by integrative roll-in fashioned second main part of steel and second connecting portion, the second main part is equipped with the fourth cavity, the second connecting portion be used for with the second connecting piece is connected.

Specifically, the truss still includes two third longerons, two the third longeron is connected respectively two the back off of longeron down the one end of last longeron, the third longeron includes by the spacing portion of the integrative roll-in fashioned third main part of steel and third, the spacing portion of third the third main part with first main part encloses and constitutes the second spout, two the second spout sets up in opposite directions in order to form the second slide, the second slide is used for being connected with power device, the third main part is equipped with the fifth cavity.

The embodiment of the application also discloses: an aerial ladder comprising a plurality of trusses nested within one another as described in this embodiment, any of said trusses being slidably connected to said truss on the inside thereof by said first runners thereon.

The embodiment of the application also discloses: the utility model provides a lower longitudinal beam, including the first main part, first spacing portion and the spacing portion of second that have first cavity, first main part have with the first end wall that first spacing portion is connected, the one end of first spacing portion with the first end wall of first main part is connected, the other end of first spacing portion is along deviating from the direction of first main part extend and with the spacing portion of second is connected, the spacing portion of second have with the second end wall that the first end wall of first main part set up relatively, the first end wall of first main part first spacing portion with the second end wall of the spacing portion of second encloses and constitutes a first spout, first main part first spacing portion with the spacing portion of second is by the integrative roll-in shaping of steel.

The utility model discloses following beneficial effect has at least:

1. compared with the mode that the steel with different structures is adopted for tailor welding in the traditional process to obtain the lower longitudinal beam with the most complex structure in the truss, the processing procedure of the lower longitudinal beam can be simplified and the production environment and the production efficiency of the lower longitudinal beam can be improved by integrally rolling and molding the steel; because the lower longitudinal beam is integrally formed by rolling, compared with tailor welding, the rolling process has the advantages of higher product precision and more stable quality. In addition, because a plurality of steel materials with different structures are not needed to be tailor-welded, the raw material of the lower longitudinal beam of the embodiment can only be a steel strip, so that the raw material can be conveniently stored and managed, the stacking of the raw material is reduced, and the stock pressure of the raw material is reduced.

2. The upper longitudinal beam and the third longitudinal beam are manufactured in an integrated rolling forming mode, so that the machining process is simplified, the machining precision is improved, and the stock pressure of raw materials is further reduced.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of an aerial ladder according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural view illustrating an assembly of a lower longitudinal beam and a third longitudinal beam according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of another side sill according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a first upper longitudinal beam in an embodiment of the present invention;

fig. 6 is a schematic structural view of a second upper longitudinal beam in an embodiment of the present invention;

fig. 7 is a schematic structural view of a third upper longitudinal beam according to an embodiment of the present invention.

Reference numerals of the above figures: 1. a truss; 11. a lower longitudinal beam; 111. a first body; 1111. a first part; 1112. a second section; 112. a first limiting part; 113. a second limiting part; 114. a first connection portion; 12. a first connecting member; 13. an upper longitudinal beam; 131. a second body; 132. a second connecting portion; 14. a second connecting member; 15. a third stringer; 151. a third body; 152. a third limiting part.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 4, the truss 1 of the present embodiment includes two side sills 11 and a plurality of first connecting members 12. The side sill 11 may include a first main body 111 having a first cavity, a first limiting portion 112, and a second limiting portion 113, and the first main body 111, the first limiting portion 112, and the second limiting portion 113 are integrally formed by rolling a steel material. The first main body 111 may have a first end wall for connecting with the first position-limiting portion 112, one end of the first position-limiting portion 112 is connected with the first end wall of the first main body 111, the other end of the first position-limiting portion 112 extends in a direction away from the first main body 111 and is connected with the second position-limiting portion 113, and the second position-limiting portion 113 has a second end wall opposite to the first end wall of the first main body 111. The first end wall of the first main body 111, the first position-limiting portion 112 and the second end wall of the second position-limiting portion 113 enclose a first sliding slot. The first connecting members 12 are used for connecting two side sills 11 which are oppositely arranged, so that the first sliding grooves of the two side sills 11 are oppositely arranged to form a first sliding way.

By the above scheme, in the truss 1 of the embodiment, the lower longitudinal beam 11 is integrally formed by rolling steel into the first main body 111, the first limit portion 112 and the second limit portion 113, the first main body 111 can meet the requirements of the stress strength and the connection stability of the lower longitudinal beam 11, the first limit portion 112 can limit other trusses 1 sliding in the first slideway along the first direction, the second limit portion 113 and the first main body 111 can limit other trusses 1 sliding in the first slideway along the second direction, and the first direction is perpendicular to the second direction.

Compared with the mode that the steel materials with different structures are adopted for tailor welding in the traditional process to obtain the lower longitudinal beam 11 with the most complex structure in the truss 1, the processing procedure of the lower longitudinal beam 11 can be simplified and the production environment and the production efficiency of the lower longitudinal beam 11 can be improved by integrally rolling and molding the steel materials; because the lower longitudinal beam 11 is integrally formed by rolling, compared with tailor welding, the rolling process has the advantages of higher product precision and more stable quality. In addition, because a plurality of steel materials with different structures are not needed to be tailor-welded, the raw material of the side sill 11 of the embodiment can only be a steel strip, so that the raw material can be conveniently stored and managed, the stacking of the raw material is reduced, and the stock pressure of the raw material is reduced.

Specifically, as shown in fig. 3 and 4, the cross section of the first main body 111 of the present embodiment along the direction perpendicular to the long axis thereof may be substantially rectangular, and the first position-limiting portion 112 may be substantially in a straight shape. The second position-limiting portion 113 may have a flat line shape or may have a second cavity, and the second position-limiting portion 113 having the second cavity may have better rigidity than the second position-limiting portion 113 having the flat line shape. When the second position-limiting portion 113 has a second cavity, the cross section of the second cavity may be rectangular or triangular. When the rigidity of the second limiting portion 113 meets the requirement, the cross section of the second cavity is preferably triangular, so that the material is saved, and the weight of the lower longitudinal beam 11 is reduced. Wherein the second end wall of the second limiting portion 113 is one side of the triangle.

As shown in fig. 3 to 4, the first stopper 112 of the present embodiment may be provided on a first end wall of the first body 111, which is preferably an end wall of the first body 111 in the rectangular width direction. The first position-limiting portion 112 may divide the first body 111 into a first portion 1111 and a second portion 1112, a first end wall corresponding to the first portion 1111 may be used to form a first sliding slot together with the first position-limiting portion 112 and the second position-limiting portion 113, and a first end wall corresponding to the second portion 1112 may be used to mount the second connecting member 14 and/or form a sliding connection portion. When the truss 1 further has the upper longitudinal beam 13, the second connecting member 14 can be used to connect the upper longitudinal beam 13 and the lower longitudinal beam 11, and in this case, the first end wall corresponding to the second portion 1112 of the first main body 111 can form a better welding space to facilitate welding the second connecting member 14 to the first main body 111; when a plurality of girders 1 are nested in one another, the girder 1 located on the inner side can be slidably connected to the first runner of the girder 1 located on the outer side via the sliding connection.

Further, as shown in fig. 1 and 2, the truss 1 of the present embodiment may further include two upper longitudinal beams 13 and a plurality of second connecting members 14, one upper longitudinal beam 13 may be connected to one lower longitudinal beam 11 through a part of the second connecting members 14, and the other upper longitudinal beam 13 may be connected to the other lower longitudinal beam 11 through another part of the second connecting members 14. By adopting the scheme, the overall rigidity and the strength of the truss 1 can be improved.

Further, as shown in fig. 2 and 5 to 7, the upper longitudinal beam 13 of the present embodiment may include a second main body 131 and a second connecting portion 132, the second main body 131 may improve strength and rigidity of the truss 1, and the second connecting portion 132 may be used to connect with the second connecting member 14, so as to improve convenience of welding. The second body 131 and the second connecting portion 132 may be integrally roll-formed from a steel material, and when the thickness of the steel material used to form the upper side member 13 is large, the second connecting portion 132 may be a single-layer steel material, and when the thickness is small, the second connecting portion 132 may be two stacked steel materials to increase the strength of the second connecting portion 132. A fourth cavity may be formed in the second body 131 to reduce the weight of the truss 1.

As shown in fig. 3 and 4, the side sill 11 of the present embodiment may further include a first connecting portion 114 integrally roll-formed with the first main body 111, the first connecting portion 114 may be located on the same side of the first main body 111 as the first sliding chute, and the first connecting portion 114 may be used for connecting with the first connecting member 12. Specifically, the first connecting portion 114 may be located below the first sliding groove, and has a flat surface for welding the first connecting member 12 thereon, so as to facilitate welding of the first connecting member 12 to the side sill 11. Further, the first connecting portion 114 of the present embodiment may have a third cavity, and the cross section of the third cavity may be rectangular or may be in a shape of a drop. When the thickness of the steel used for forming the side sill 11 is large, the third cavity is arranged, so that the first connecting portion 114 can be prevented from cracking in the forming process, and the strength and rigidity of the first connecting portion 114 are prevented from being affected.

As shown in fig. 1 to 3, when the truss 1 of the present embodiment is used as the outermost segment of the aerial ladder, it may further include two third longitudinal beams 15. Two third longitudinal beams 15 are connected to the ends of the two side sills 11 facing away from the upper longitudinal beam 13, respectively. The third longitudinal beams 15 may include a third main body 151 and a third limiting portion 152 integrally formed by rolling a steel material, the third limiting portion 152 and the third main body 151 and the first main body 111 enclose to form a second sliding groove, the second sliding grooves of the two third longitudinal beams 15 are oppositely arranged to form a second sliding way, and the second sliding way may be used to connect the truss 1 with a hydraulic power device. That is to say, the truss 1 can be slidably connected with the hydraulic power device through the second slideway, and under the action of the hydraulic power device, the truss 1 can slide in the reverse direction towards or away from the power device, so as to further realize the extension and retraction of the aerial ladder. A fifth cavity may be formed in the third body 151, which is beneficial for reducing the weight of the truss 1.

The side sill 11 of the present embodiment can be prepared in the following manner: the two ends of the steel plate are bent for multiple times, one side of the steel plate is bent at 8 positions and used for forming a first limiting portion 112, a second limiting portion 113, a first portion 1111 and a first connecting portion 114 of the first main body 111, the other side of the steel plate is bent at 5 positions and used for forming a second portion 1112 of the first main body 111, two end portions of the two sides of the steel plate can be bent towards the inside of the first cavity and welded in the first cavity, and one end portion of the two end portions can be welded to the inner wall of the first cavity to improve the strength and rigidity of the first main body 111. Although the welding is also adopted in the manufacturing process of the side sill 11 of the present embodiment, the difference from the way of welding a plurality of angle steels, open cold-formed steel sections, steel plates, and the like in the prior art is that the end portions of the side sill 11 of the present embodiment are welded after being integrally roll-formed, at this time, the welded portions are well positioned, which is beneficial to simplifying the welding process and improving the welding precision, and more importantly, the welding of the side sill 11 of the present embodiment does not involve a plurality of parts, so that the stock pressure of the raw materials is not affected. Similarly, the upper side member and the third side member of the present embodiment have these advantages if there is a step of welding the end portions.

The upper longitudinal beam 13 of the present embodiment may be prepared in the following manner: one end of the steel plate is bent a plurality of times to form the second body 131 having the second cavity, and an end portion of the end is welded to the other end of the steel plate. The upper longitudinal beam 13 of the present embodiment can also be prepared in the following manner: and the two ends of the steel plate are respectively rolled and bent for multiple times to form a second main body 131 and a second connecting part 132, the end parts of the two ends of the steel plate are welded in the fourth inner cavity, and the end part of one end of the steel plate is welded on the side wall of the fourth inner cavity to improve the rigidity and strength of the second main body 131.

The third longitudinal beam 15 of the present embodiment may be prepared in the following manner: the two ends of the steel plate are bent for multiple times respectively, one side of the steel plate forms a 6-position bent angle, the side is used for forming a third limiting portion 152, the other side of the steel plate forms a 4-position bent angle, two end portions on two sides of the steel plate can be welded in the fifth cavity, and one end portion can be welded on the side wall of the fifth cavity to improve the strength and rigidity of the third main body 151.

As shown in fig. 1 and 2, the aerial ladder of the present embodiment may include a plurality of trusses 1 nested with each other as described in the present embodiment, and the cross-sections of the plurality of trusses 1 nested with each other are different in size. Any truss 1 is connected with the truss 1 positioned (nested) at the inner side of the truss in a sliding way through the first slide way on the truss. The plurality of mutually nested trusses 1 form a multi-section aerial ladder, and the outermost truss 1 may further include a third longitudinal beam 15 in the embodiment, so that a second slideway is formed between the first main body 111 and the third longitudinal beam 15, and the outermost truss 1 can slide under the action of the power device through the second slideway. The multi-section truss 1 positioned at the inner side can not comprise the third longitudinal beam 15, and can be connected with the corresponding truss 1 in a sliding mode through the first slide way, so that the weight of the truss 1 can be reduced, and the power requirement is reduced.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A truss is characterized by comprising two lower longitudinal beams and a plurality of first connecting pieces, wherein each lower longitudinal beam comprises a first main body with a first cavity, a first limiting part and a second limiting part, the first main body is provided with a first end wall connected with the first limiting part, one end of the first limiting part is connected with the first end wall of the first main body, the other end of the first limiting part extends in the direction departing from the first main body and is connected with the second limiting part, the second limiting part is provided with a second end wall oppositely arranged with the first end wall of the first main body, a first sliding groove is formed by surrounding the first end wall of the first main body, the first limiting part and the second end wall of the second limiting part, the first main body, the first limiting part and the second limiting part are integrally formed by rolled steel, and the first connecting pieces are used for connecting two lower longitudinal beams which are oppositely arranged, so that the first sliding grooves of the two lower longitudinal beams are oppositely arranged to form a first sliding way.

2. The truss of claim 1 wherein the first limiting portion divides the first body into a first portion and a second portion, the first end wall of the first portion is used for enclosing the first sliding slot with the first limiting portion and the second limiting portion, and the first end wall of the second portion is used for installing a second connecting member and/or forming a sliding connection portion.

3. The truss of claim 1 wherein the second limiting member has a second cavity, the second limiting member has a triangular cross-section perpendicular to the long axis, and the second end wall of the second limiting member is a side of the triangle.

4. The truss of claim 1 wherein the side sills further comprise a first connection integrally roll formed with the first body, the first connection being on the same side of the first body as the first runner, the first connection being for connection to the first connector.

5. The truss of claim 4 wherein the first connection has a third cavity.

6. The truss of claim 1 further including two upper stringers and a plurality of second connectors, one of said upper stringers being connected to one of said lower stringers by a portion of said second connectors and the other of said upper stringers being connected to the other of said lower stringers by another portion of said second connectors.

7. The truss of claim 6 wherein the upper longitudinal beam comprises a second body integrally roll formed from steel and a second connecting portion, the second body defining a fourth cavity, the second connecting portion adapted to connect to the second connecting member.

8. The truss of claim 6, further comprising two third longitudinal beams, wherein the two third longitudinal beams are respectively connected to ends, away from the upper longitudinal beam, of the two lower longitudinal beams, the third longitudinal beams comprise a third main body and a third limiting portion, the third main body and the first main body are integrally formed by rolling steel materials, the third limiting portion, the third main body and the first main body are enclosed to form a second sliding groove, the two second sliding grooves are oppositely arranged to form a second sliding way, the second sliding way is used for being connected with a power device, and the third main body is provided with a fifth cavity.

9. An aerial ladder comprising a plurality of mutually nested trusses as claimed in any one of claims 1 to 7, any one of said trusses being slidably connected to said truss on its inner side by said first runners thereon.

10. The utility model provides a lower longitudinal beam, its characterized in that, including the first main part, first spacing portion and the spacing portion of second that have first cavity, first main part have with the first end wall of first spacing portion connection, the one end of first spacing portion with the first end wall of first main part is connected, the other end of first spacing portion is along deviating from the direction of first main part extend and with the spacing portion of second is connected, the spacing portion of second have with the second end wall of the relative setting of first end wall of first main part, the first end wall of first main part first spacing portion with the second end wall of the spacing portion of second encloses and constitutes a first spout, first main part first spacing portion with the spacing portion of second is by steel integrated into one piece roll-in press.

11. The side sill according to claim 10, wherein the first limiting portion divides the first main body into a first portion and a second portion, the first end wall corresponding to the first portion is used for enclosing with the first limiting portion and the second limiting portion to form the first sliding groove, and the first end wall corresponding to the second portion is used for installing a second connecting member and/or forming a sliding connection portion.

12. The side sill according to claim 10, wherein the second stopper portion has a second cavity, a cross section of the second stopper portion perpendicular to a long axis thereof has a triangular shape, and a second end wall of the second stopper portion is a side of the triangular shape.