阅读说明：本技术 一种低地板有轨电车浮车端梁及下部铰接安装座结构 (end beam and lower hinged mounting base structure of low-floor tramcar floating car ) 是由 阚松 刘琳峰 陈晨 王晶晶 毕海涛 杨坤 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种低地板有轨电车浮车端梁及下部铰接安装座结构,包括端梁和设置在端梁后端中心的铰接安装座,所述端梁上设置有两个左右对称的车间减震安装座,所述铰接安装座两侧设置有左右对称的旋转止档；所述端梁由一块主型材和一块副型材前后拼焊组成,主型材和副型材均为中空结构,其内部设置有增加刚度和强度的筋板；所述铰接安装座内部具有梯形中空,梯形中空内部设置有加强筋。这种低地板有轨电车浮车端梁及下部铰接安装座结构强度性能好,结构简单,制作及维护方便,成本低,在满足承载能力的前提下,保证了结构的轻量化设计；独特的端梁、铰接安装座、旋转止档和车间减震安装座的布置形式,满足了车辆运行的稳定性和舒适性要求。(The invention discloses an end beam and lower hinged installation seat structure of a low-floor tramcar floating body, which comprises an end beam and a hinged installation seat arranged in the center of the rear end of the end beam, wherein two bilaterally symmetrical workshop shock absorption installation seats are arranged on the end beam, bilaterally symmetrical rotation stop stops are arranged on two sides of the hinged installation seat, the end beam is formed by welding main section bars and auxiliary section bars in a front-back manner, the main section bars and the auxiliary section bars are of hollow structures, rib plates for increasing rigidity and strength are arranged in the hollow sections, a trapezoidal hollow structure is arranged in the hinged installation seat, and reinforcing ribs are arranged in the trapezoidal hollow section.)

The damping mounting structure comprises an end beam (1) and a hinged mounting base (2) arranged in the center of the rear end of the end beam (1), the damping mounting base (4) is arranged on the left side and the right side of the hinged mounting base (2) on the end beam (1), the damping mounting base (4) is arranged on the two workshop damping mounting bases (2) and is bilaterally symmetrical with the hinged mounting base (2) by taking the hinged mounting base (2) as the center, two rotating stoppers (3) which are bilaterally symmetrical with the center are arranged on the hinged mounting base (2), the end beam (1) is formed by main sectional materials (11) and ) which are rectangular structural auxiliary sectional materials (12) which are spliced and welded in front and back, the main sectional materials (11) and the auxiliary sectional materials (12) are aluminum profiles, a main tube cavity (115) which are communicated with the outer parts of the left and right ends of the main sectional materials of the rectangular structural body is arranged in the main sectional materials (115), the main tube cavity (115) is of a rectangular structural body, the main tube cavity of the main tube cavity (115), the main tube face (115) is in a rectangular structural body, the main tube face of the main tube face (11) and the rectangular structural body, the upper end plate (115), the auxiliary sectional materials are hinged cover plate (21), the auxiliary sectional materials are hinged mounting plate (20), the auxiliary sectional materials, the rectangular structural body (20), the auxiliary sectional materials are hinged mounting plate (20) and the plug is formed by the plug, the plug is hinged plug, the plug 20) which is hinged plug 20, the plug 20) and the plug 20, the plug is hinged plug 20, the plug is hinged plug 20, the plug is formed by the plug, the plug 20, the plug is hinged plug, the plug 20, the plug is hinged plug, the plug 20, the plug and the plug, the plug is arranged in the plug, the plug is hinged plug, the plug 20, the plug is formed by the plug 20, the plug is formed by the plug and the plug, the plug is formed by the plug, the plug is formed by the plug.

2. The types of low-floor tramcar floating end beam and lower hinged mounting seat structures are characterized in that vertical rib plates (116) are vertically arranged in the center of a main cavity (115) along the left-right direction of the main cavity, the main cavity (115) is divided into a front independent cavity and a rear independent cavity by the vertical rib plates (116), longitudinal rib plates (117) connected with the vertical rib plates (116) and the rear end beam plate (113) are longitudinally arranged in the center of the rear cavity along the left-right direction of the rear cavity, the rear cavity is divided into an upper independent cavity and a lower independent cavity by the longitudinal rib plates (117), the formed front cavity and the upper independent cavity are of an inverted triangle structure, main inclined ribs (118) are arranged in the front cavity, the upper cavity and the lower cavity, the main inclined ribs (118) in the front cavity are provided with two vertically symmetrical structures, the main inclined ribs are of a '>' structure, the main inclined ribs (118) in the upper cavity and the lower cavity are respectively provided with blocks which are vertically symmetrical and are of a '<' structure, the upper inclined rib plate (118) and the main inclined ribs (120 mm, the main inclined ribs (118) and the rear inclined rib plates (118) are located between the front cavity and the main inclined ribs (7 mm, the main inclined ribs (118) and the rear end beam (13 mm, the main inclined ribs (118) are connected with the main inclined ribs, the main inclined ribs (13 mm, the rear end beam 15mm, the main inclined ribs (13 mm, the main inclined ribs (118) and the rear end beam 15mm, the main inclined ribs (13 mm, the rear end beam structure, the main inclined ribs (13 mm) are connected with the main inclined ribs, the main inclined ribs (120 mm, the rear end beam 15mm, the rear end beam 13mm, the rear end beam structure, the main inclined ribs (13 mm) of the main inclined ribs (118) of the main inclined ribs.

3. The end beam and lower hinged mounting base structures of the low-floor tramcar floating car is characterized in that two inner end plates (127) parallel to a front end plate (124) and a rear end plate (123) are vertically arranged in a secondary cavity (125) along the left-right direction, the secondary cavity (125) is divided into a front cavity, a middle cavity and a rear cavity by the inner end plates (127), wherein the rear cavity and the middle cavity are internally provided with symmetrical secondary inclined ribs (128), the two secondary inclined ribs (128) form end faces of a herringbone structure, the length and width of the secondary section bar (112) is 286mm and 120mm, the thicknesses of the front end plate (124), the rear end plate (123) and the inner end plate (127) are all 5mm, the thicknesses of parts of the secondary upper cover plate (121) corresponding to the rear cavity and the middle cavity are both 7mm, the thickness of the part corresponding to the front cavity is 6mm, the thicknesses of the parts of the secondary lower cover plate (122) corresponding to the rear cavity and the middle cavity are both 7mm, the thicknesses of the parts of the secondary inclined ribs corresponding to the front cavity are both 6mm, and the thickness of the secondary inclined ribs (128) is 3 mm.

4. The end beam and lower hinged installation base structure of low-floor tramcar according to claim 1, wherein a transition plate (5) is arranged at the bottom of the joint of the main lower cover plate (112) and the trapezoidal lower cover plate (23), the thickness of the transition plate (5) is 4mm, and the bottom of the hinged installation base (2) and the bottom of the end beam (1) are fixedly connected with points through two rows of rivets.

5. The end beam and lower hinged mounting base structure of low-floor tramcar according to claim 1, wherein the trapezoidal upper cover plate (22) and the trapezoidal lower cover plate (23) are both provided with two triangular lightening holes (221) with the same structure and size, rectangular lightening holes (222) are further arranged between the two triangular lightening holes (221) on the trapezoidal upper cover plate (22), the length and width of the rectangular lightening holes (222) are 240mm to 100mm, the triangular lightening holes (221) are in a right-angled triangle structure, and the lengths of the two right-angled sides are 70mm to 90 mm.

6. The end beam and lower hinged installation base structures of low-floor tramcar floats are characterized in that two vertical and symmetrical longitudinal reinforcing ribs are arranged in a trapezoidal hollow cavity of the hinged installation base (2), transverse reinforcing ribs are arranged between the two longitudinal reinforcing ribs, the transverse reinforcing ribs are parallel to a trapezoidal upper cover plate (22) and a trapezoidal lower cover plate (23), the end portions of the transverse reinforcing ribs are connected with the hinged installation base (2), the distance between the two longitudinal reinforcing ribs is 270mm, the thickness of a rib plate of a single longitudinal reinforcing rib is 10mm, the width of each transverse reinforcing rib is 20mm, and the thickness of each transverse reinforcing rib is 6 mm.

7. The end beam and lower hinged installation seat structure of the low-floor tramcar according to claim 1, wherein the left end and the right end of the rear end plate (25) symmetrically extend outside the two side plates (24), the top of the rear end plate extends upwards and is higher than the trapezoidal upper cover plate (22), the thickness of the extending end of the left end and the right end of the rear end plate (25) is 10mm, the main upper cover plate (111) is provided with a connecting plate (6), the connecting plate (6) is fixedly welded on the rear end plate (25) and is perpendicular to the portion of the rear end plate (25) higher than the trapezoidal upper cover plate (22), five reinforcing ribs (7) symmetrically arranged left and right are welded on the perpendicular portion of the connecting plate (6) and the rear end plate (25), the thickness of the reinforcing ribs (7) is 8mm, the reinforcing ribs are used for connecting the rear end plate (25) and the connecting plate (6), the thickness of the connecting plate (6) is 10mm, the connecting plate is fixed on the main upper cover plate (111) through four rows of rivets, the extending ends of the rear end plate (25) are provided with two rows of bolts, and each row of the connecting plate (84) is riveted on the upper end plate (84), and the hinged installation seat structure, and the two rows of the.

8. The end beam and lower hinge mount structure of the tram float car according to claim 1, wherein the thickness of the trapezoidal upper cover plate (22) is 15mm, the thickness of the trapezoidal lower cover plate (23) is 6mm, the thickness of the front hinge mount plate (21) is 15mm, the thickness of the rear end plate (25) is 15mm, the thickness of the side plate (24) is 4mm, and the bottom angles of the trapezoidal upper cover plate (22) and the trapezoidal lower cover plate (23) are both 60 °.

9. The end beam and lower hinge mount structure of low-floor tramcar according to claim 1, wherein the rotation stopper (3) is a rectangular square tube with a hollow structure, the length and width of the end surface is 60mm by 60mm, the thickness of the tube wall is 4mm, the center length is 203mm, the rotation stopper (3) forms an angle of 70 degrees with the mounting plane of the hinge mount (2), and the distance from the left center and the right center of the end beam (1) is 335 mm.

10. The end beam and lower hinged mounting base structure of low-floor tramcar according to claim 1, wherein the workshop shock-absorbing mounting base (4) is a boss structure consisting of a rectangular base and two bosses juxtaposed above and below the rectangular base, the length and width of the end face of the rectangular base is 110mm x 130mm, the thickness of the end face of the rectangular base is 6mm, the length, width and height of each boss are 34mm, and the distance from the left center and the right center of the end beam (1) is 1400 mm.

Technical Field

The invention relates to the field of low-floor tramcars, in particular to an type low-floor tramcar floating car end beam and lower hinged mounting seat structure.

Background

The end beam and the hinged installation seat need to bear longitudinal force, transverse force, vertical force and corresponding torsional load generated in the running process of the vehicle and transmit the force to other vehicles through the hinged mechanism.

However, in the existing low-floor tramcar, the end beam of the mounting base for lifting and mounting the hinge mechanism bears the complex dynamic load of the hinge mechanism, the stress of the hinge mechanism is large, and the force is directly transmitted to the mounting base and the end beam of the hinge mechanism without a buffering energy-absorbing device, so that the stress of the mounting base and the end beam of the hinge mechanism is large. If the design of the installation seat and the end beam is unreasonable, the potential safety hazard that the end part of the vehicle body and the hinged seat are cracked until being damaged can be caused, so that the strong bearing capacity of the installation seat and the end beam is a condition which needs to be met.

In the running process of the vehicle, the axle weight of the vehicle is strictly required, so that under the condition of meeting the strength of the vehicle body, the end beam and the hinged mounting seat are required to be designed in a light weight mode, and meanwhile, the structure of the vehicle is required to be simple, the vehicle is convenient to manufacture, and the cost requirement is met.

Disclosure of Invention

The invention aims to solve the technical problem of providing end beam and lower hinged mounting seat structures of a low-floor tramcar floating body, wherein structures can meet various load requirements generated when the low-floor tramcar runs, meet hinged connection, have light weight design and simple structure and are convenient to manufacture.

The technical scheme includes that the mounting structure comprises an end beam and a hinged mounting seat arranged in the center of the rear end of the end beam, workshop shock absorption mounting seats are respectively arranged on the left side and the right side of the hinged mounting seat on the end beam, the two workshop shock absorption mounting seats are bilaterally symmetrical with the hinged mounting seat as the center, two rotation stop bars which are bilaterally symmetrical with the center are arranged on the hinged mounting seat, the end beam is formed by splicing rectangular main sectional materials and rectangular auxiliary sectional materials in a front-back manner, the main sectional materials and the auxiliary sectional materials are aluminum profiles, a main pipe cavity communicated with the outer parts of the left end and the right end of the main sectional materials is arranged in the main sectional materials, the main pipe cavity is of a rectangular structure, the upper end of the corresponding main sectional materials forms a main upper cover plate, the lower end of the main cover plate forms a main lower cover plate, the front end beam is a rectangular front end beam, the rear end plate is formed by a trapezoidal upper end plate, the hinged mounting plate, the plug is arranged in the trapezoidal lower end plate, the trapezoidal cover plate, the plug is hinged with the trapezoidal cover plate, the plug of the trapezoidal cover plate, the plug is formed by riveting the plug of the rectangular lower end plate, the plug of the plug and the plug of the plug, the plug of the plug and the plug of the plug and the plug, the plug of the plug, the plug is formed by the plug and the plug of the plug and the plug, the plug are formed by the plug, the plug is formed by the plug, the plug is formed by the plug, the plug is formed by the plug, the.

Preferably, vertical rib plates are vertically arranged at the center of the main cavity along the left-right direction of the main cavity, the main cavity is divided into a front independent cavity and a rear independent cavity by the vertical rib plates, longitudinal rib plates for connecting the vertical rib plates with the rear beam plate are longitudinally arranged at the center of the rear cavity along the left-right direction of the rear cavity, the rear cavity is divided into an upper independent cavity and a lower independent cavity by the longitudinal rib plates, the formed front cavity and the upper independent cavity and the lower independent cavity are of an inverted triangle structure, main inclined ribs are arranged in the front cavity, the upper cavity and the lower cavity respectively, the two main inclined ribs in the front cavity are vertically symmetrical and are of a '>' structure, the main inclined ribs in the upper cavity and the lower cavity respectively have blocks and are vertically symmetrical and are of a '<' structure, four main inclined ribs in the front cavity, the upper cavity and the lower cavity form end faces of a diamond structure, the long width of the main section bar is 326mm, the main section bar has a thickness of 10mm, the part corresponding to the upper cavity is 8mm, the part corresponding to the upper cover plate and the part corresponding to the rear end beam plate, the part of the main inclined rib plate is 7mm, the main inclined rib plate, the part corresponding to the rear end plate is 7mm, the part corresponding to the part of the main cover plate, the part corresponding to the main cover plate, the main cavity is 7mm, the main section bar, the part corresponding to the rear inclined rib plate, the part corresponding to the main cavity, the thickness of.

Preferably, two inner end plates which are parallel to the front end plate and the rear end plate are vertically arranged in the auxiliary pipe cavity along the left-right direction of the auxiliary pipe cavity, the auxiliary pipe cavity is divided into a front cavity, a middle cavity and a rear cavity by the inner end plates, auxiliary oblique ribs which are symmetrical to each other are arranged in the rear cavity and the middle cavity, and the two auxiliary oblique ribs form the end surface of a herringbone structure; the length and width dimension of vice section bar is 286mm 120mm, and wherein the thickness of front end plate, rear end plate and inner end plate is 5mm, the position thickness that corresponds back cavity and well cavity on the vice upper cover plate is 7mm, and the position thickness that corresponds preceding cavity is 6mm, the position thickness that corresponds back cavity and well cavity on the vice apron down is 7mm, and the position thickness that corresponds preceding cavity is 6mm, the thickness of vice diagonal rib is 3 mm.

Preferably, a transition plate is arranged at the bottom of the joint of the main lower cover plate and the trapezoidal lower cover plate, the thickness of the transition plate is 4mm, and the bottom of the hinged mounting seat and the bottom of the end beam are fixedly connected with through two rows of rivets.

Preferably, the trapezoidal upper cover plate and the trapezoidal lower cover plate are both provided with two triangular lightening holes with the same structure and size, rectangular lightening holes are further arranged between the two triangular lightening holes on the trapezoidal upper cover plate, the length and width of each rectangular lightening hole is 240mm x 100mm, each triangular lightening hole is in a right-angled triangle structure, and the length of two right-angled sides of each triangular lightening hole is 70mm x 90 mm.

Preferably, two longitudinal reinforcing ribs which are vertically and symmetrically arranged are arranged in the trapezoidal hollow cavity of the hinged mounting seat, transverse reinforcing ribs which are parallel to the trapezoidal upper cover plate and the trapezoidal lower cover plate and the end parts of which are connected with the hinged mounting seat are arranged between the two longitudinal reinforcing ribs, the distance between the two longitudinal reinforcing ribs is 270mm, the thickness of the rib plate of a single longitudinal reinforcing rib is 10mm, the width of the transverse reinforcing rib is 20mm, and the thickness of the transverse reinforcing rib is 6 mm.

Preferably, the left end and the right end of the rear end plate symmetrically extend out of the two side plates, the top of the rear end plate extends upwards and is higher than the trapezoidal upper cover plate, and the thickness of the extending ends of the left end and the right end of the rear end plate is 10 mm; the connecting plate is arranged on the main upper cover plate and fixedly welded on the rear end plate, the connecting plate is perpendicular to the part, higher than the trapezoidal upper cover plate, of the rear end plate, five reinforcing ribs which are symmetrically arranged left and right are welded at the perpendicular part of the connecting plate and the rear end plate, the thickness of each reinforcing rib is 8mm, the reinforcing ribs are connected with the rear end plate and the connecting plate, the thickness of each connecting plate is 10mm, the connecting plates are fixed on the main upper cover plate through four rows of rivets, two rows of bolt groups which are symmetrical up and down are arranged on the extending ends at the two ends of the rear end plate, and each row of bolt groups are formed by arranging three bolts of M20 at equal intervals and are riveted on the end beam.

Preferably, the thickness of the trapezoidal upper cover plate is 15mm, the thickness of the trapezoidal lower cover plate is 6mm, the thickness of the front hinge mounting plate is 15mm, the thickness of the rear end plate is 15mm, the thickness of the side plate is 4mm, and the base angles of the trapezoidal upper cover plate and the trapezoidal lower cover plate are both 60 °.

Preferably, the rotation stopper is a rectangular square tube with a hollow structure, the length and width of the end face of the square tube are 60mm x 60mm, the thickness of the tube wall is 4mm, the length of the center of the square tube is 203mm, the rotation stopper and the installation plane of the hinge installation seat form an angle of 70 degrees, and the distance between the rotation stopper and the left center and the right center of the end beam is 335 mm.

Preferably, the workshop damping mounting base is of a boss structure and consists of a rectangular base and two bosses which are arranged on the rectangular base in parallel up and down, the length and width of the end face of the rectangular base are 110mm x 130mm, the thickness of the end face of the rectangular base is 6mm, the length, width and height of each boss are 34mm, and the distance between each boss and the left center and the right center of an end beam is 1400 mm.

Compared with the prior art, the end beam and the lower hinged mounting seat structure of the low-floor tramcar have the advantages that the end beam is composed of the aluminum profiles with hollow sections and arranged reinforcing ribs inside, the structure is simple, the strength performance is good, the manufacture is convenient, the cost is low, the lightweight design of the structure is guaranteed, the hinged mounting seat is of the trapezoidal hollow structure, the stress is reasonable, the whole shape is consistent with the transmission path of the load, the structural strength is detailed and enhanced, the structure is simple and reasonable, the maintenance is convenient, in addition, through the optimized design of the structure, on the premise of meeting the bearing capacity, a plurality of lightening holes are arranged in the hinged mounting seat, the dead weight is lightened, and the unique arrangement forms of the end beam, the hinged mounting seat, the rotary stop and the workshop damping mounting seat meet the requirements on the stability and the comfort of the running of the tramcar.

Drawings

FIG. 1 is a schematic view of the exterior structure of an end beam and a lower hinged mounting base structure of kinds of low-floor tramcars according to the invention;

FIG. 2 is a top view of the end beam and lower hinged mounting structure of low-floor tramcar floats of the invention;

FIG. 3 is a schematic side view of the end beam and lower hinged mounting base structure of kinds of low-floor tramcar floats;

FIG. 4 is a schematic side view of the profile of the end beam and lower hinged mounting base structure of low-floor tram floating car of the invention;

fig. 5 is a schematic side view of a second profile of types of low-floor tram floating car end beam and lower hinge mount structure of the invention.

In the figure: 1. an end beam; 11. a main section bar; 111. a main upper cover plate; 112. a main lower cover plate; 113. a rear end beam panel; 114. a front end beam panel; 115. a main lumen; 116. a vertical rib plate; 117. longitudinal rib plates; 118. a main diagonal rib; 119. a main plug; 12. a secondary section bar; 121. attaching a cover plate; 122. a sub-lower cover plate; 123. a rear end plate; 124. a front end plate; 125. a secondary lumen; 126. an interface; 127. an inner end plate; 128. an auxiliary diagonal rib; 129. a sub-plug; 2. a hinged mounting seat; 21. a front hinged mounting plate; 22. a trapezoidal upper cover plate; 221. triangular lightening holes; 222. rectangular lightening holes; 23. a trapezoidal lower cover plate; 24. a side plate; 25. a rear end plate; 3. stopping rotation; 4. a workshop damping mounting seat; 5. a transition plate; 6. a connecting plate; 7. and (5) reinforcing ribs.

Detailed Description

The invention is described in detail below with reference to the figures and the detailed description.

The technical scheme includes that low-floor tramcar floating car end beam and lower hinged mounting base structures comprise an end beam 1 and a hinged mounting base 2 arranged in the center of the rear end of the end beam 1, workshop shock-absorbing mounting bases 4 are respectively arranged on the left side and the right side of the hinged mounting base 2 on the end beam 1, two workshop shock-absorbing mounting bases 4 are bilaterally symmetrical with the hinged mounting base 2 by taking the hinged mounting base 2 as the center, two rotary stop bars 3 which are bilaterally symmetrical with the center are arranged on the hinged mounting base 2, the end beam 1 is formed by splicing and welding main section bars 11 and which are rectangular structural auxiliary section bars 12 in a front-back manner, the main section bar 11 and the auxiliary section bar 12 are aluminum sections, a main pipe cavity 115 communicated with the left and right outer portions of the main section bar 11 is arranged in the main section bar 11, the main section bar 111 and the lower end plate 112, the front end plate 11 and the auxiliary section bar 12 are rectangular structural, the main section bar 115 is arranged in the main section bar 11 and is arranged in the main section bar 11, the main section bar is provided with the left and right end outer portions, the main section bar 24 is formed by a rectangular structural cavity, the trapezoidal auxiliary section bar 21, the trapezoidal cover plate 24, the trapezoidal cover plate 23 is formed by riveting and the trapezoidal cover plate 24, the trapezoidal cover plate 23 is formed by riveting and the trapezoidal cover plate 20, the trapezoidal cover plate 23, the trapezoidal cover plate 20 is hinged mounting base plate 20, the trapezoidal cover plate 23 is hinged mounting base plate 23, the trapezoidal cover plate 23 is hinged mounting base plate, the trapezoidal cover plate 23, the upper cover plate 23, the trapezoidal cover plate 20, the upper cover plate 23 is hinged mounting structure, the trapezoidal cover plate 23 is hinged mounting structure, the upper cover plate 23, the trapezoidal cover plate 23, the plug is hinged mounting plate 23, the trapezoidal cover plate 23 is hinged mounting structure is hinged mounting plate 23, the trapezoidal cover plate 20 is hinged mounting structure, the upper cover plate 20, the trapezoidal cover plate 23 cover plate, the trapezoidal cover plate 20 cover plate 23 cover plate, the trapezoidal cover plate 20 cover plate, the trapezoidal cover plate 20 cover plate, the plug is hinged mounting plate 23 cover plate 20 is hinged mounting plate, the trapezoidal cover plate 23 cover plate, the trapezoidal cover plate 20 cover plate, the trapezoidal cover plate 20 is hinged mounting plate 23 is hinged mounting structure is hinged mounting plate 23 cover plate, the plug is hinged mounting structure.

In order to meet the strength requirement of an end beam 1, as shown in fig. 4, vertical rib plates 116 are vertically arranged in the center of a main cavity 115 along the left-right direction of the main cavity, the vertical rib plates 116 divide the main cavity 115 into two front and rear independent cavities, longitudinal rib plates 117 connecting the vertical rib plates 116 and a rear end beam plate 113 are longitudinally arranged in the center of the rear cavity along the left-right direction of the main cavity, the longitudinal rib plates 117 divide the rear cavity into two identical upper and lower independent cavities, the formed front cavity and the upper and lower cavities are of an inverted triangle structure, main inclined ribs 118 are arranged in the front cavity, the upper cavity and the lower cavity, the main inclined ribs 118 in the front cavity are provided with two main inclined ribs 118 which are vertically symmetrical and are of a '>' structure, the main inclined ribs 118 in the upper cavity and the upper inclined ribs 118 in the upper cavity and the lower cavity are provided with blocks which are vertically symmetrical and are of a '<' structure, four main inclined ribs 118 which are located in the front cavity, the upper cavity and the lower cavity are located in the front cavity, the corresponding to the main inclined rib plates, the front end plate 112, the central beam 120mm of the central beam 120mm, the central beam 120mm of the central beam 120mm, the central beam 120mm of the central beam is correspondingly, the central beam 120mm of the central beam, the central beam 120mm of the central beam, the central beam 120mm of the central beam, the central beam is correspondingly, the central beam 120mm of the central beam, the central beam 120mm of the central beam is correspondingly, the central beam 120mm of the central beam, the central beam 120mm of the central beam 120 mm.

In order to maximally disperse the operation load transmitted by the hinged installation seat 2 and meet the strength requirement of the end beam 1, a transition plate 5 is arranged at the bottom of the joint of the main lower cover plate 112 and the trapezoidal lower cover plate 23, the thickness of the transition plate 5 is 4mm, and the bottom of the hinged installation seat 2 and the bottom of the end beam 1 are fixedly connected at through two rows of rivets.

In order to meet the bearing capacity of the hinged mounting seat 2 and simultaneously facilitate the reduction of the weight of the whole structure and achieve the requirement of light weight of products, two triangular lightening holes 221 with the same structure and size are respectively arranged on the trapezoidal upper cover plate 22 and the trapezoidal lower cover plate 23, wherein rectangular lightening holes 222 are also arranged between the two triangular lightening holes 221 on the trapezoidal upper cover plate 22, the length and width of each rectangular lightening hole 222 is 240mm x 100mm, each triangular lightening hole 221 is in a right-angled triangular structure, and the length of two right-angled sides of each triangular lightening hole is 70mm x 90 mm.

In order to enable the load generated by the hinging mechanism during the running of a vehicle to be uniformly distributed in the hinging mounting seat 2 as much as possible so as to improve the bearing capacity of the hinging mounting seat 2, namely improve the requirements on the strength and the rigidity of the hinging mounting seat 2, two vertical reinforcing ribs which are vertically and symmetrically arranged are arranged in the trapezoidal hollow cavity of the hinging mounting seat 2, transverse reinforcing ribs which are parallel to the trapezoidal upper cover plate 22 and the trapezoidal lower cover plate 23 and the end parts of which are connected with the hinging mounting seat 2 are arranged between the two longitudinal reinforcing ribs, the distance between the two longitudinal reinforcing ribs is 270mm, the thickness of the rib plate of each longitudinal reinforcing rib is 10mm, the width of each transverse reinforcing rib is 20mm, and the thickness of each transverse.

In order to meet the riveting installation and strength requirements of the hinge installation seat 2 with a trapezoidal structure, the left end and the right end of the rear end plate 25 symmetrically extend out of the two side plates 24, the top of the rear end plate extends upwards and is higher than the trapezoidal upper cover plate 22, and the thickness of the extending end of the left end and the right end of the rear end plate 25 is 10 mm; the main upper cover plate 111 is provided with a connecting plate 6, the connecting plate 6 is fixedly welded on the rear end plate 25 and is perpendicular to the part of the rear end plate 25 higher than the trapezoidal upper cover plate 22, five reinforcing ribs 7 which are symmetrically arranged left and right are welded on the perpendicular part of the connecting plate 6 and the rear end plate 25, the thickness of each reinforcing rib 7 is 8mm, the reinforcing rib is connected with the rear end plate 25 and the connecting plate 6, the thickness of the connecting plate 6 is 10mm, the connecting plate is fixed on the main upper cover plate 111 through four rows of rivets, two rows of bolt groups which are symmetrical up and down are arranged on the extending ends of two ends of the rear end plate 25, and each row of bolt groups are formed by arranging three M20 bolts at equal intervals to rivet the hinged mounting seat 2 on the end beam 1; the above structure can maximally disperse the hinge mount 2.

For the obvious reinforcing of articulated mount pad 2's performance, satisfy the transmission of various loads in the vehicle operation process simultaneously, trapezoidal upper cover plate 22's thickness is 15mm, and trapezoidal lower cover plate 23's thickness is 6mm, and preceding articulated mounting panel 21's thickness is 15mm, and rear end plate 25's thickness is 15mm, and curb plate 24's thickness is 4mm, trapezoidal upper cover plate 22 and trapezoidal lower cover plate 23's base angle are 60.

In order to meet the requirements of normal running of a vehicle and the running stability of the vehicle, and simultaneously ensure that the rotary stop 3 and the workshop damping mounting seat 4 are simple in structure and convenient to manufacture, and meet the requirements of strength, rigidity and light weight when the vehicle runs, the rotary stop 3 is a rectangular square tube with a hollow structure, the length and width of the end surface of the square tube are 60mm x 60mm, the thickness of the tube wall is 4mm, the center length is 203mm, the rotary stop 3 and the mounting plane of the hinged mounting seat 2 form an angle of 70 degrees, and the distance between the rotary stop 3 and the left center and the right center of the end beam 1 is 335 mm; workshop shock attenuation mount pad 4 is the boss structure, and it comprises rectangle basement and two upper and lower bosses that set up on the rectangle basement side by side, rectangle basement terminal surface length and width size is 110mm 130mm, and thickness is 6mm, the size that the boss length and width is high is 34mm, and its distance apart from the center about end beam 1 is 1400 mm.

The end beam 1 of the low-floor tramcar floating end beam and lower part hinged mounting seat structure is composed of aluminum profiles with hollow sections and arranged internal reinforcing ribs, the structure is simple, the strength performance is good, the manufacture is convenient, the cost is low, the lightweight design of the structure is guaranteed, the hinged mounting seat 2 is of a trapezoidal hollow structure, the stress is reasonable, the whole shape and the transmission path of the load are reduced, the structural strength is improved finely, the structure is simple and reasonable, the maintenance is convenient, in addition, through the optimized design of the structure, on the premise of meeting the bearing capacity, a plurality of lightening holes are arranged in the hinged mounting seat 2, the self weight is lightened, and the unique arrangement forms of the end beam 1, the hinged mounting seat 2, the rotary stop 3 and the workshop damping mounting seat 4 meet the requirements on the stability and the comfort of vehicle operation.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.