A car body and bogie suspension connecting device

Abstract

The application discloses a kind of car body and bogie hanging connection device. Including car frame middle beam and bogie, each axle of bogie is provided with a set of hanging connection device;Each set of hanging connection device includes: device upper part and middle beam flange or web limiting contact suspension combination hook assembly, device lower part can pass through axle, and with axle rotation limiting combination U-shaped suspension ring assembly, located in device middle part connecting hook assembly and U-shaped suspension ring assembly's crossbeam assembly.The car body and bogie hanging connection device of the application adopts arc-shaped hook, crossbeam, U-shaped bolt, connecting plate combination screw, nut and other fasteners combination into four-point hanging type connection device, avoids the obstacle above axle, realizes the horizontal hanging of car body to bogie, adapts the narrow space of the combination of bogie and car body, avoids to disassemble and test vehicle, device uses screw adjustment mode, it is convenient to adjust and compensate the height deviation between car body and bogie axle;Flexible, convenient to use.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of railway wagon design, and relates to a hanging connection device between a car body and a bogie. BACKGROUND

[0002] A railway vehicle mainly consists of a car body, a bogie, a brake device and a coupler and buffer device. The car body is a carrier for carrying goods and is structurally solid and not easily deformed. The bogie is a running part of the railway vehicle and supports the rest of the components of the vehicle to run on a track. In China, the car body and the bogie of a railway vehicle, especially a railway wagon, are mainly connected by a center plate. Two upper center plates are arranged at intervals on a center sill of the car body, and the lower part of each upper center plate is a flat-bottomed conical body protruding downward. A lower center plate is arranged on the bogie, and the upper part of the lower center plate has a flat-bottomed cylindrical groove. When the vehicle is assembled, the two upper center plates of the car body are respectively placed into the groove of the lower center plate of the bogie. The lower center plate supports the car body and restricts the vertical downward freedom of the car body, forming a connection mode similar to a column hinge, so that the car body and the bogie have rotational freedom and a certain overturning freedom, thereby ensuring that the vehicle can smoothly pass through horizontal curves and vertical curves.

[0003] However, this connection mode does not restrict the vertical upward freedom of the car body, and when the car body is lifted upward, the car body will be separated from the bogie. In addition, a brake pull rod or a brake pipe arranged on the car body needs to be connected with the brake device of the bogie to enable the vehicle to have a braking function. The car body is also provided with an automatic derailment brake device, and a pull ring of the automatic derailment brake device is combined with a lifting beam to form a closed structure around the axle body of the bogie. When the bogie is separated from the car body due to derailment of the vehicle or other reasons, the axle will deviate from the normal position and touch the pull ring to automatically trigger the braking of the vehicle.

[0004] The car body near the center sill above the bogie is provided with a brake pipe, a brake pull rod, a derailment brake device and other components, and the space is narrow. The front and rear from the plate seat are installed in the inner cavity of the center sill, and the connection between the center sill and the inner cavity is achieved by using a pull rivet. The head of the pull rivet is located on the outer side of the web of the center sill. Because the upper surface of the flange of the center sill is arranged with bolts for connecting a coupler and buffer device and is welded with brake accessories, the upper surface of the flange of the center sill is not flat. In order to ensure the rotational freedom of the car body and the bogie, the car body of a railway vehicle in China is generally not provided with a device for hanging the bogie. When the whole vehicle needs to be lifted and transported to other locations, the usual practice is to remove the connection structures such as the automatic derailment brake device, the brake pull rod or the brake pipe between the car body and the bogie components, separate the car body from the bogie, lift and transport them to storage locations respectively, and then reassemble the vehicle and retest the braking performance to detect and confirm that the quality of the assembled vehicle is good. The whole vehicle needs to be disassembled and lifted, and a lot of equipment is needed, the operation is complicated, and the workload is large. Therefore, it is necessary to design a new type of hanging connection device between the car body and the bogie, which can hang the bogie under the car body to realize the lifting and transportation of the whole vehicle, eliminate the repetitive labor of disassembling and testing the vehicle, and improve the work efficiency. SUMMARY

[0005] The present application discloses a kind of car body and bogie hanging connection device for the above needs.The present application aims to provide a kind of mechanical device suitable for narrow space, connect fixed car body and bogie, and the mechanical device reliably hangs bogie under car body, lifting appliance can directly lift car body, through the hanging connection of the device and car body, simultaneously lifting bogie, realizes whole car hoisting.

[0006] The present application is realized by the following technical solutions:

[0007] A kind of car body and bogie hanging connection device, characterized in that:

[0008] Car body includes frame center sill, and the center sill includes top surface top plate, both sides of center sill web and the bottom of center sill web extends to both sides of center sill flange;Bogie includes axle;Each axle is provided with a set of hanging connection device;

[0009] Each set of hanging connection device includes: device upper part and the contact of center sill flange and the suspension combination of center sill web limit with hook assembly, device lower part can pass through axle, and the U-shaped suspension ring assembly of rotation limit combination with axle, located device middle part coupling hook assembly and U-shaped suspension ring assembly of crossbeam assembly.

[0010] The present application further described hook assembly includes two groups, and each group is suspended with one side of center sill flange, and each group includes first hook close to upper center disc of car body and second hook far from upper center disc of car body;Each hook is U-shaped hanger with two support edges, and the upper support edge is hook head suspended on the surface of center sill flange upper edge, and the lower support edge is hook seat and crossbeam assembly are connected and fixed.

[0011] The present application further described U-shaped suspension ring assembly includes two groups, and two groups of U-shaped suspension ring assembly are arranged symmetrically along the longitudinal center line of car body;Each group is composed of U-shaped bolt and sheath that is sleeved on the arc part of U-shaped bolt, and axle passes through two U-shaped bolt arc parts and is suspended and rotates with sheath, and the upper end of each group of U-shaped bolt two screw rods are suspended and fixed on the same crossbeam assembly through bolt.

[0012] The present application further described crossbeam assembly includes two groups, and two groups of crossbeam assembly are arranged symmetrically along the longitudinal center line of car body, and each group is composed of crossbeam assembly and lug plate;Crossbeam assembly is U-shaped groove beam, and two holes for connecting with U-shaped bolt screw rod are arranged symmetrically in the middle part, and two circular holes for bolt connection and fixation with the lower support plate hook seat of first hook and second hook are arranged transversely at both ends;Two groups of lug plates are fixedly arranged on the outer wall of opposite inner side of two crossbeam assemblies, and two connecting plates are hingedly connected with lug plate through pin shaft.

[0013] The two first hooks of the relative arrangement are closer to the center plate on the vehicle body than the two second hooks, and the first hooks and the second hooks are both away from the vertical direction of the axle and do not interfere with the obstacles such as the derailment automatic brake device, the buffer support plate and the mounting bolt arranged on the beam flange.

[0014] The hook head of the first hook is tightly attached to the side surface of the beam web, and the bottom surface of the U-shaped groove of the second hook is tightly attached to the side surface of the lower cover plate of the beam, and the bottom surface of the hook head of the first hook and the second hook is parallel to the bottom surface of the hook base, and the beam flange is embedded in the U-shaped groove to form a combination structure of the upper part of the hanging connection device contacting the beam flange and being limited and suspended by the outer side of the beam web.

[0015] The lower part of the side surface of the hook head of the first hook is provided with an inclined chamfer for avoiding the first round corner of the combined part of the beam web and the flange of the vehicle body, and the length of the hook head of the second hook is smaller than that of the first hook for avoiding the fastening rivet of the beam web, and the bottom hook body of the U-shaped groove of the second hook is a narrowing structure for adapting to the narrow space rotating through the vehicle body.

[0016] The U-shaped groove of the beam of the beam assembly is symmetrically welded with a reinforcing rib plate with the same cross-sectional structure in the groove.

[0017] The sheath is a round pipe sheath made of a non-metal material with flexibility.

[0018] The present application has the advantages that: the hanging connection device of the vehicle body and the bogie of the present application is combined with the arc-shaped hook, the beam assembly, the U-shaped bolt, the connecting plate combined screw, the nut and other fasteners to form a four-point hanging type connection device, which skillfully avoids the obstacles above the axle, realizes the horizontal hanging of the vehicle body to the bogie, adapts to the narrow space at the combined part of the bogie and the vehicle body, avoids the disassembly and testing of the vehicle, and saves the cost of whole vehicle hoisting. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a side view of the hanging connection device of the present application;

[0020] Figure 2 is a left view of Figure 1 ;

[0021] Figure 3 is a top view of Figure 1 ;

[0022] Figure 4 is a perspective view of the hanging connection device of the present application;

[0023] Figure 5 is the front view of the first hook of the hanging connection device of the present application;

[0024] Figure 6 is the three-dimensional structure diagram of the first hook of the hanging connection device of the present application;

[0025] Figure 7 is the front view of the second hook of the hanging connection device of the present application;

[0026] Figure 8 is the three-dimensional structure diagram of the second hook of the hanging connection device of the present application;

[0027] Figure 9 is the structure diagram of the beam assembly of the hanging connection device of the present application;

[0028] Figure 10 is the Figure 9 left view;

[0029] Figure 11 is the Figure 9 top view;

[0030] Figure 12 is the Figure 9 bottom view;

[0031] Figure 13 is the structure diagram of the U-shaped bolt of the hanging connection device of the present application;

[0032] Figure 14 is the structure diagram of the connecting plate of the hanging connection device of the present application;

[0033] Figure 15 is the left three-dimensional structure diagram of the coupling state of the hanging connection device of the present application;

[0034] Figure 16 is the right three-dimensional structure diagram of the coupling state of the hanging connection device of the present application.

[0035] In the figure, 1 is the first hook, 2 is the second hook, 3 is the beam assembly, 4 is the U-shaped bolt, 5 is the sheath, 6 is the connecting plate, 7 is the pin shaft, 8 is the split pin, 9 is the screw, 10 is the washer, 11 is the first nut, 12 is the second nut, 13 is the buffer supporting plate, 14 is the lower cover plate, 15 is the middle beam, 16 is the first brake pipe, 17 is the pull rivet, 18 is the second brake pipe, 19 is the bogie axle, 20 is the derailment automatic brake device, 21 is the bogie, 22 is the longitudinal center line of the car body, 23 is the parallel line of the transverse coordinate axis of the car body;

[0036] 1.1 is the hook head of the first hook, 1.2 is the hook body of the first hook, 1.3 is the hook seat of the first hook, and 1.4 is the first round hole of the first hook; 1.1a is the bottom surface of the hook head of the first hook, 1.1b is the inclined angle of the hook head of the first hook, 1.1c is the side surface of the hook head of the first hook, 1.3a is the bottom surface of the hook seat of the first hook, and 1.4a is the axis of the first round hole of the first hook;

[0037] 2.1 is the hook head of the second hook, 2.2 is the hook body of the second hook, 2.3 is the hook seat of the second hook, and 2.4 is the first round hole of the second hook; 2.1a is the bottom surface of the hook head of the second hook, 2.2a is the inner side surface of the hook body of the second hook, 2.3a is the bottom surface of the hook seat of the second hook, and 2.4a is the axis of the second round hole of the second hook;

[0038] 3.1 is the channel beam of the cross beam assembly, 3.2 is the lug plate of the cross beam assembly, and 3.3 is the web plate of the cross beam assembly; 3.1a is the third round hole of the channel beam, 3.1b is the fourth round hole of the channel beam, 3.1c is the second round angle of the channel beam, 3.2a is the fifth round hole of the lug plate, 3.2b is the third round angle of the lug plate, and 3.2c is the axis of the fifth round hole of the lug plate;

[0039] 4.1 is the external thread of the U-shaped bolt, 4.2 is the circular arc part of the U-shaped bolt, and 6.1 is the sixth round hole of the connecting plate;

[0040] 15.1 is the middle beam flange, 15.2 is the first round angle of the middle beam web plate and flange joint, and 15.3 is the middle beam web plate;

[0041] H is the distance between the two adjacent lug plates, L is the distance between the two sixth round holes on the connecting plate, R is the inner radius of the circular arc of the U-shaped bolt, and t is the thickness of the connecting plate. DETAILED DESCRIPTION

[0042] The application will be further described in conjunction with the specific embodiments, which are further illustrations of the principles of the application and do not limit the application in any way. The same or similar technologies as the application do not exceed the protection scope of the application.

[0043] In conjunction with the drawings.

[0044] The hanging connection device of the car body and the bogie includes a first hook, a second hook, a cross beam assembly, a U-shaped bolt, a sheath, a connecting plate, a pin shaft, a split pin, a screw, a first nut, and a second nut.

[0045] The two first hooks and the two second hooks are symmetrically distributed on both sides of the bogie axle center line, wherein the first hook is close to the upper center plate of the car body, the first hook and the second hook are both distributed on both sides of the middle beam of the car body, the upper parts of the first hook and the second hook are both hooked on the lower flange of the middle beam, the side surface of the hook head of the first hook is close to the middle beam web plate, and the inner side surface of the hook body of the second hook is close to the side surface of the middle beam lower cover plate.

[0046] Two crossbeam assemblies are distributed on both sides of the middle beam of the vehicle body, wherein the ears of the crossbeam assemblies are all directed to the longitudinal center line of the vehicle body, the top portions of the crossbeam assemblies are in contact with the bottom portions of the first lifting hook and the second lifting hook respectively, one first lifting hook, one second lifting hook and one crossbeam are coupled into an integrated whole through the first circular hole or the second circular hole, the third circular hole, and a screw, a washer and a first nut, two connecting plates are pin-connected into an integrated whole through the fifth circular hole of the ear and a pin shaft, and the positioning effect of the hook head side surface of the first lifting hook and the inner side surface of the hook body of the second lifting hook is added to prevent the first lifting hook, the second lifting hook and the crossbeam from moving in the transverse direction of the vehicle body during hoisting;

[0047] Two U-shaped bolts with a sheath are distributed symmetrically at both ends of the axle of the bogie, the bolt segments of the U-shaped bolts pass through the third circular hole of the crossbeam assembly after being sleeved into the axle, and the U-shaped bolts are fastened by a second nut, and stable hoisting is realized.

[0048] The vehicle body and bogie hanging connection device adopts a four-point hanging structure, is balanced in stress, is stable in structure, and skillfully avoids obstacles such as the derailment automatic brake device, the buffer support plate and the mounting bolt fixed on the vehicle body directly above the axle;

[0049] The device adopts a detachable structure, is suitable for narrow spaces near the axle, and when assembled, the first lifting hook and the second lifting hook can reach the assembly position through rotation, movement and other movement modes through the small gap between the brake pipe and the middle beam, and the brake pipe and other vehicle parts are avoided from being disassembled.

[0050] The side surface of the first lifting hook is arc-shaped and includes a hook head, a hook body and a hook base, the hook head of the first lifting hook is relatively long, so that the side surface of the hook head is in contact with the outer side of the web plate of the middle beam after assembly, cooperates with the crossbeam assembly and the connecting plate, and realizes the transverse positioning of the first lifting hook, the lower part of the side surface of the hook head is inclined, so as to avoid the first round corner of the combined part of the web plate and the flange of the middle beam of the vehicle body, the bottom surface of the hook head is parallel to the bottom surface of the hook base, two first circular holes with a diameter slightly larger than the outer diameter of the screw thread of the screw are processed on the hook base, the axis of the first circular holes is perpendicular to the bottom surface of the hook base and also perpendicular to the bottom surface of the hook head, and the bottom surface of the hook head of the first lifting hook is in contact with the upper surface of the flange of the middle beam of the vehicle body during use, the screw bears the tension of the hanging bogie axle along the axis of the first circular hole during hoisting of the bogie, the tension is perpendicular to the upper surface of the flange of the middle beam, so that the hook does not deflect, and always maintains a normal position during hoisting of the bogie.

[0051] The second hook side is arc-shaped, including a hook head, a hook body and a hook base. The hook head of the second hook is slightly shorter than the first hook to avoid the pull rivet installed on the web of the middle beam. The width of the hook body is relatively narrow to ensure that the second hook can smoothly pass through the narrow gap between the flange of the middle beam and the second brake pipe after rotating 90° from the hanging position. When in the hanging position, the inner side of the hook body is in contact with the side of the lower cover plate of the middle beam, cooperating with the cross beam assembly and the connecting plate to realize the transverse positioning of the second hook. The bottom surface of the hook head of the second hook is parallel to the bottom surface of the hook base. Two second round holes with the same diameter as the first round hole are processed on the hook base, and the axis of the second round hole is perpendicular to the bottom surface of the hook base and the bottom surface of the hook head, so as to ensure that the second hook always maintains a normal position during the hoisting of the bogie.

[0052] The cross beam assembly includes a channel beam, an ear plate and a rib plate. The web of the channel beam has two third round holes at each end, and the size of the third round hole matches the first round hole. The fourth round hole is symmetrically distributed in the middle of the web, and the diameter of the fourth round hole is slightly larger than the diameter of the U-shaped bolt, which is used to install a screw or a bolt for transmitting the hoisting force. Two rib plates are symmetrically fixed in the groove of the channel beam to strengthen the structure of the channel beam and prevent the two flanges from expanding outward when the channel beam is under stress. Four ear plates are fixed on the outside of one flange of the channel beam. The distance between the two ear plates on each side of the rib plate is slightly greater than the thickness t of the connecting plate. The fifth round hole is provided on the ear plate for pinning the connecting plate. The exposed right angles at both ends of the channel beam are all rounded into second round angles, and the exposed right angles on the ear plate are all rounded into third round angles to prevent the operator from being injured.

[0053] The U-shaped bolt is a cylindrical body with a U-shaped axis. A section of external thread is provided at both ends. The U-shaped section is semicircular, and the inner radius R of the semicircular arc is slightly larger than the outer diameter of the axle body, which is used to constrain and support the axle of the bogie. The outer periphery of the U-shaped bolt is smooth, and a non-metallic flexible round pipe with an inner diameter slightly larger than the outer diameter of the U-shaped bolt is sleeved on the semicircular part of the U-shaped bolt to avoid scratching the axle during hoisting.

[0054] The side of the connecting plate is long and strip-shaped, and the two ends are semicircular and each have a sixth round hole. The distance L between the two sixth round holes can ensure that the side of the hook head of the two first hooks is in contact with the outer side of the web of the middle beam, and the inner side of the hook body of the two second hooks is in contact with the side of the lower cover plate of the middle beam after the assembly of the connecting plate, preventing the first hook and the second hook from transversely moving.

[0055] The components will be described in detail below with reference to the accompanying drawings.

[0056] As Figure 5 , Figure 6As shown, the first hook is made of thick plate into an arch shape, the hook head of the first hook is longer, so that the hook head side is in contact with the web plate outside of the middle beam after assembly, cooperating with the cross beam assembly, connecting plate, realizing the horizontal positioning of the first hook, the lower part of the hook head side is inclined, to avoid the first round corner of the combined part of the web plate and the upper surface of the flange of the middle beam of the car body, the bottom surface of the hook head of the first hook is parallel to the bottom surface of the hook base, two first round holes with a diameter slightly larger than the outer diameter of the screw thread are processed on the hook base, the axis is perpendicular to the bottom surface of the hook base, also perpendicular to the bottom surface of the hook head, the bottom surface of the hook head of the first hook is in contact with the upper surface of the flange of the middle beam of the car body during use, the screw bears the tension of the suspension bogie axle along the axis of the first round hole, the tension is perpendicular to the upper surface of the flange of the middle beam, so that the hook does not deviate, and always maintains the normal position during hoisting the bogie.

[0057] As shown in Figure 7 , Figure 8 , the second hook is also made of thick plate into an arch shape, the hook head of the second hook is slightly shorter, to avoid the pull rivet installed on the web plate of the middle beam, the width of the hook body of the second hook is relatively narrow, to ensure that the second hook can smoothly pass through the narrow gap between the side surface of the flange of the middle beam and the second brake pipe after rotating 90° from the hanging position, and when in the hanging position, the inner side surface of the hook body is in contact with the side surface of the lower cover plate of the middle beam, cooperating with the cross beam assembly, connecting plate, realizing the horizontal positioning of the second hook, the bottom surface of the hook head of the second hook is also parallel to the bottom surface of the hook base, two second round holes with the same diameter as the first round hole are processed on the hook base, the axis is perpendicular to the bottom surface of the hook base, also perpendicular to the bottom surface of the hook head, the principle is the same as the first hook.

[0058] As shown in Figure 9 , Figure 10 , Figure 11 , Figure 12 , the cross beam assembly is formed by mutually fixed groove beam, lug plate and rib plate, two third round holes with the same size as the first round hole are processed at both ends of the web plate of the groove beam, the fourth round hole is symmetrically processed in the middle of the web plate, with a diameter slightly larger than the outer diameter of the U-shaped bolt, used for installing the screw or bolt for transmitting the hoisting force, the four right angles of the groove beam are inclined into second round corners, the lug plate is made of relatively thin rectangular flat plate, two corners are inclined into third round corners to avoid scratching the operator, a fifth round hole with a diameter slightly larger than the outer diameter of the pin shaft is processed on the lug plate, the rib plate is a flat plate with the same shape as the cross section of the inner cavity of the groove beam, two rib plates are symmetrically distributed in the grooves at both ends of the groove beam and between the third round hole and the fourth round hole, to strengthen the structure of the groove beam and prevent the two flanges from expanding outward under stress, four lug plates are fixed on one side of the groove beam, two lug plates are symmetrically arranged on both sides of each rib plate, with a spacing H slightly larger than the thickness t of the connecting plate, leaving space for assembling and disassembling the connecting plate.

[0059] As shown in Figure 13As shown, the U-shaped bolt adopts a round steel which is bent into a symmetrical structure with a semicircular middle part, the inner diameter R of which is slightly larger than the outer diameter of the axle body of the bogie axle, and the two ends are two slender cylinders connected with the semicircular part, and a section of external thread is processed at the two ends, which is used to constrain and support the axle of the bogie, the whole bogie is lifted by the axle, and the radial displacement of the axle is limited, the outer periphery of the U-shaped bolt is smooth to avoid knocking the axle during lifting. The sheath is made of non-metallic material and has flexibility, and is cut into a circular tube, which is sleeved on the arc part of the U-shaped bolt during use to avoid knocking the axle during lifting.

[0060] As shown in the drawings, Figure 14 As shown, the connecting plate is processed into a long strip shape with a flat plate, the two ends are semicircular, and a sixth circular hole is processed on each end, and the spacing L value can ensure that the hook head side of the two first lifting hooks is in contact with the outer side of the web plate of the center beam, and the inner side of the hook body of the two second lifting hooks is in contact with the side surface of the lower cover plate of the center beam, and the first lifting hook and the first lifting hook are prevented from moving along the lateral direction of the vehicle body through symmetrical constraint.

[0061] When the bogie and vehicle body hanging connection device is used, the two first lifting hooks and the two second lifting hooks are symmetrically arranged on both sides of the center beam of the vehicle body above the axle, the hook heads of the first lifting hooks and the second lifting hooks hook the upper surface of the flange of the center beam, the first lifting hooks are arranged on the center beam far from the upper center disc of the vehicle body, the second lifting hooks are arranged on the center beam close to the upper center disc of the vehicle body, each cross beam assembly is arranged parallel to the center beam, the ear plates of the two cross beam assemblies are close to the longitudinal center line of the center beam, the top surface of the cross beam assembly is in contact with the bottom of the hook seat of the first lifting hook and the second lifting hook on the same side of the center beam, then the cross beam assembly is fixed at the bottom of the first lifting hook and the second lifting hook by using screws, first nuts and washers, a sheath is sleeved on the arc part of the U-shaped bolt, and the two U-shaped bolts are sleeved on the axle body of the bogie axle respectively, so that the two studs are vertically upward and respectively pass through the two fourth circular holes of the cross beam assembly, then the second nut is installed and tightened, the arc part of the U-shaped bolt is tightly attached to the axle, the two connecting plates are respectively placed between the two ear plates, the sixth circular hole of the connecting plate is aligned with the fifth circular hole of the ear plate, then the pin shaft and the split pin are inserted, and the two cross beam assemblies are fixed by pin connection, and the hanging connection of the vehicle body and the bogie is completed.

Claims

1. A suspension connection device for a car body and a bogie, characterized in that: The car body includes a frame beam, which includes a top plate, two side webs, and flanges extending from the bottom of the webs to the sides; the bogie includes an axle; each axle is equipped with a suspension connection device. Each set of hanging connection devices includes: a hook assembly at the top of the device that contacts the flange of the middle beam and is limited and suspended by the web of the middle beam; a U-shaped suspension ring assembly at the bottom of the device that can pass through the axle and is limited and suspended by the axle; and a crossbeam assembly located in the middle of the device that connects the hook assembly and the U-shaped suspension ring assembly. The hook assembly comprises two sets, each set being suspended and connected to one side of the center beam flange. Each set includes a first hook closer to the upper center plate of the vehicle body and a second hook farther from the upper center plate of the vehicle body. Each hook is a U-shaped hanger with two supporting sides. The upper supporting side is the hook head, which is suspended on the upper surface of the center beam flange, and the lower supporting side is the hook seat, which is connected and fixed to the crossbeam assembly. The hook heads of both the first and second hooks are suspended on the upper surface of the center beam flange. The side of the hook head of the first hook is in close contact with the web of the center beam, and the bottom surface of the U-shaped groove of the second hook is in close contact with the side of the lower cover plate of the center beam. The bottom surfaces of the hook heads of the first and second hooks are parallel to the bottom surface of the hook seat. The center beam flange is embedded in each U-shaped groove to form a suspension connection structure in contact with the center beam flange and in a limiting suspension connection structure with the web of the center beam.

2. The car body and bogie suspension connection device according to claim 1, characterized in that: The U-shaped suspension ring assembly includes two sets, which are symmetrically arranged on both sides of the longitudinal centerline of the vehicle body. Each set consists of a U-shaped bolt and a sleeve fitted on the arc of the U-shaped bolt. The axle passes through the arc of the two U-shaped bolts and is rotatably connected with the sleeve. The two screws at the upper end of each U-shaped bolt are fixed to the same crossbeam assembly by bolt suspension.

3. The car body and bogie suspension connection device according to claim 2, characterized in that: The crossbeam assembly includes two sets, which are symmetrically arranged on both sides of the longitudinal centerline of the vehicle body. Each set consists of a crossbeam assembly and ear plates. The crossbeam assembly is a U-shaped channel beam with two holes symmetrically arranged in the middle for connecting with a U-shaped bolt. Two round holes are arranged laterally at both ends for connecting and fixing with the lower support plate hook seats of the first hook and the second hook by bolts. Two sets of ear plates are fixedly installed on the outer walls of the opposite inner sides of the two crossbeam assemblies. The two connecting plates are respectively hinged to the ear plates by pins.

4. The car body and bogie suspension connection device according to claim 3, characterized in that: The two first hooks arranged opposite each other are closer to the upper center plate of the car body than the two second hooks arranged opposite each other. Both the first hooks and the second hooks avoid the vertical above the axle and do not interfere with the derailment automatic braking device, buffer plate and mounting bolts arranged on the flange of the middle beam.

5. The car body and bogie suspension connection device according to claim 3, characterized in that: The lower side of the first hook head is provided with a chamfered edge to avoid the first rounded corner at the junction of the web of the middle beam and the flange of the vehicle body; the hook head length of the second hook is less than that of the first hook head to avoid the fastening rivets of the web of the middle beam, and the hook body of the second hook has a narrowed U-shaped groove bottom to adapt to the narrow space of the vehicle body when rotating.

6. The car body and bogie suspension connection device according to claim 3, characterized in that: The U-shaped channel beam of the crossbeam assembly has symmetrically welded and fixed reinforcing ribs with the same cross-sectional structure inside the groove.

7. The car body and bogie suspension connection device according to claim 3, characterized in that: The sheath is a round tube made of a non-metallic, flexible material.

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