Carriage chassis connecting structure

Abstract

The utility model discloses a carriage chassis connecting structure, and particularly relates to the technical field of carriage chassis, which comprises an end beam, a main beam is mounted on one side of the end beam, a cross beam is mounted on the inner side of the main beam, an elastic connecting piece is mounted in the cross beam and comprises a bolt, a gasket is sleeved on the outer wall of the top end of the bolt, and the elastic connecting piece is connected with the end beam. The bolt is sleeved with an elastic cylinder, and a nut is installed on the outer wall of the bottom end of the bolt in a threaded mode. According to the carriage chassis connecting structure, through the arrangement of the elastic connecting pieces, when the carriage chassis bears the load, the pressure of the cross beams is transmitted to the longitudinal beams at the bottom, and when the cross beams extrude the longitudinal beams, the cross beams extrude the elastic cylinders to deform, so that pressure telescopic spaces are formed in the connecting positions between the cross beams and the longitudinal beams; therefore, deformation of the non-connection positions of the cross beams and the longitudinal beams when bearing pressure for a long time is avoided, the service life of the carriage underframe is prolonged, the use stability of the carriage underframe connection structure is improved, and meanwhile the bearing effect of the carriage underframe is improved.

Description

Technical Field

[0001] This utility model relates to the field of carriage underframe technology, specifically a carriage underframe connection structure. Background Technology

[0002] The car body underframe is an important component of a vehicle. It not only bears the weight of the car body but is also responsible for safely and effectively transferring these loads to the tracks. Therefore, the design and manufacturing technology of the car body underframe is directly related to the safety, reliability, and economy of the vehicle. The underframe must be able to withstand the full weight of the car body itself and the passengers or cargo and distribute these loads evenly to the bogies.

[0003] Existing car body underframes typically use C-shaped steel, which is lighter than solid steel, reducing the overall weight of the vehicle, improving efficiency, and lowering operating costs. However, the steel is usually connected by welding or bolts, making the underframe structure inconvenient to disassemble and maintain. Furthermore, the crossbeams and longitudinal beams are fastened with bolts, which may cause deformation of the steel without support points under long-term load. Therefore, a new car body underframe connection structure is needed. Utility Model Content

[0004] The purpose of this utility model is to provide a chassis frame connection structure to solve the problems mentioned in the background art, such as the inconvenience of disassembling and maintaining the chassis frame due to welding and bolt fixing, and the tendency for deformation to occur after long-term use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a chassis frame connection structure for a carriage, including an end beam, a main beam installed on one side of the end beam, and a crossbeam installed on the inner side of the main beam. An elastic connector is installed inside the crossbeam, and the elastic connector includes a bolt. A washer is sleeved on the outer wall of the top of the bolt, and an elastic cylinder is sleeved on the outside of the bolt. A nut is threaded on the outer wall of the bottom of the bolt, and a longitudinal beam is installed on the outside of the bolt. A baffle is welded to the inner side of the main beam, and a rivet is installed on one side of the main beam.

[0006] Preferably, the main beams are symmetrically installed on both sides of the end beams, and the two end beams and the two main beams form a rectangular frame structure. The end beams are pressed and fitted against one side of the baffle, and the end beams are engaged inside the main beams. The end beams, main beams and crossbeams are all C-shaped steel.

[0007] Preferably, the end beam has support plates welded at equal intervals on its inner side, and the end beam is fixedly installed to the main beam by rivets. The longitudinal beam has a rectangular cross-section and a through hole is opened through the interior of the longitudinal beam. The bottom of the cross beam has mounting holes opened at equal intervals, and bolts are inserted into the mounting holes and through holes.

[0008] Preferably, the washer is pressed between the bolt and the crossbeam, and the elastic cylinder is pressed between the crossbeam and the longitudinal beam, the nut is pressed at the bottom of the longitudinal beam, and the elastic cylinder is made of rubber.

[0009] Preferably, the elastic connectors are installed at equal intervals on the inner side of the crossbeam, the longitudinal beams are installed at equal intervals on the bottom of the end beam and the crossbeam, and the crossbeams are engaged on the inner side of the main beam, and the baffles are installed at equal intervals on the inner side of the main beam.

[0010] Preferably, one side of the crossbeam is fitted to one side of the baffle, and a reinforcing plate is fixedly connected to the inner side of the crossbeam. The reinforcing plates are symmetrically arranged on both sides of the elastic connector, and fixing holes are provided through both sides of the crossbeam.

[0011] Preferably, the main beam and the crossbeam are provided with connecting holes at their contact positions, the connecting holes and the fixing holes are arranged perpendicularly to each other, and the rivets are inserted into the fixing holes and the connecting holes, and the main beam is fixedly installed to the crossbeam by the rivets.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the connecting structure of the carriage chassis;

[0013] 1. By setting up elastic connectors, when the underframe of the carriage is under load, the pressure of the crossbeam is transmitted to the bottom longitudinal beam. When the crossbeam squeezes the longitudinal beam, the crossbeam squeezes and deforms the elastic cylinder, which in turn creates pressure expansion space at the connection between the crossbeam and the longitudinal beam. This prevents deformation of the non-connected parts of the crossbeam and the longitudinal beam under long-term pressure, thereby increasing the service life of the carriage underframe, increasing the stability of the carriage underframe connection structure, and improving the load-bearing capacity of the carriage underframe.

[0014] 2. By using elastic connectors and rivets, the end beams, main beams, longitudinal beams, and transverse beams are installed and fixed together. During disassembly, simply unscrew the nuts and remove the bolts to remove the longitudinal beams. Cut the rivets in the middle to remove them from both sides of the main beams, and then disassemble the transverse beams and main beams. This also facilitates the disassembly of the end beams and main beams, thereby making it easier to disassemble and maintain the underframe of the carriage and improving the usability of the underframe connection structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the position and structure of the baffle of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure between the crossbeam and the main beam of this utility model;

[0018] Figure 4This is a schematic diagram showing the disassembled structure of the elastic connector and rivet of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the elastic connector of this utility model.

[0020] In the diagram: 1. End beam; 2. Main beam; 3. Elastic connector; 31. Bolt; 32. Washer; 33. Elastic cylinder; 34. Nut; 4. Longitudinal beam; 5. Baffle; 6. Crossbeam; 7. Reinforcing plate; 8. Rivet; 9. Mounting hole; 10. Through hole; 11. Fixing hole; 12. Connecting hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5This utility model provides a technical solution: a chassis frame connection structure, including an end beam 1, a main beam 2 installed on one side of the end beam 1, and a crossbeam 6 installed on the inner side of the main beam 2. The main beams 2 are symmetrically installed on both sides of the end beam 1, and the two end beams 1 and the two main beams 2 form a rectangular frame structure. The end beam 1 is pressed against one side of the baffle 5 and is engaged with the inner side of the main beam 2. The end beam 1, main beam 2 and crossbeam 6 are all C-shaped steel. An elastic connector 3 is installed inside the crossbeam 6, and the elastic connector 3 includes a bolt 31. A washer 32 is sleeved on the outer wall of the top of the bolt 31. The washer 32 is placed between the bolt 31 and the crossbeam 6 to increase the friction between the bolt 31 and the crossbeam 6, thereby facilitating the bolt 31 to be tightened. 1. Securely tighten the nut 34 to facilitate the installation and use of the elastic connector 3. An elastic sleeve 33 is fitted onto the outside of the bolt 31, and a nut 34 is threaded onto the bottom outer wall of the bolt 31. A longitudinal beam 4 is installed on the outside of the bolt 31. A washer 32 is pressed between the bolt 31 and the crossbeam 6, and the elastic sleeve 33 is pressed between the crossbeam 6 and the longitudinal beam 4. The nut 34 is pressed at the bottom of the longitudinal beam 4. The elastic sleeve 33 is made of rubber, which has a certain degree of elasticity, thus facilitating the increase of the expansion and contraction space between the crossbeam 6 and the longitudinal beam 4. When the crossbeam 6 is subjected to greater pressure at unsupported locations, the deformation of the elastic sleeve 33 at the connection point can bear a larger portion of the pressure at the fulcrum, thereby distributing the pressure to other parts of the crossbeam 6. To bear the pressure and prevent deformation and breakage of the crossbeam 6 in non-supported positions, elastic connectors 3 are installed at equal intervals on the inner side of the crossbeam 6. Longitudinal beams 4 are installed at equal intervals at the bottom of the end beams 1 and crossbeam 6, and the crossbeam 6 is engaged with the inner side of the main beam 2. Baffles 5 are welded to the inner side of the main beam 2, and are also evenly spaced. The baffles 5 facilitate the limiting installation of the crossbeam 6 and end beam 1. Rivets 8 are installed on one side of the main beam 2, and support plates are welded at equal intervals on the inner side of the end beam 1. The support plates increase the load-bearing capacity of the end beam 1, and the end beam 1 is fixed to the main beam 2 by rivets 8. The longitudinal beam 4 has a rectangular cross-section; the closed structure increases the load-bearing capacity of the longitudinal beam 4, and the interior of the longitudinal beam 4 is perforated. A through hole 10 is provided. Mounting holes 9 are evenly spaced at the bottom of the crossbeam 6, and bolts 31 are inserted into the mounting holes 9 and the through hole 10. One side of the crossbeam 6 is fitted against the side of the baffle 5, and a reinforcing plate 7 is fixedly connected to the inner side of the crossbeam 6. The reinforcing plates 7 are symmetrically arranged on both sides of the elastic connector 3. The reinforcing plates 7 facilitate increasing the load-bearing capacity of the crossbeam 6. Fixing holes 11 are provided through the crossbeam 6 on both sides. Connecting holes 12 are correspondingly provided at the contact positions between the main beam 2 and the crossbeam 6. The connecting holes 12 and the fixing holes 11 are perpendicular to each other, and rivets 8 are inserted into the fixing holes 11 and the connecting holes 12. The main beam 2 is fixedly installed to the crossbeam 6 by the rivets 8. When not in use, the top of the rivet 8 is cylindrical. Figure 4As shown in the figure, the rivet 8 can be fixed inside the main beam 2 after the top is stamped, thereby installing and fixing the main beam 2 and the crossbeam 6. At the same time, the two ends of the rivet 8 are large in volume, which limits and fixes them. Then, when disassembling, the middle part of the rivet 8 can be cut off, and the two ends of the rivet 8 can be moved outward to remove it, making it convenient to disassemble the rivet 8.

[0023] Working principle: The baffle 5 is welded to the inside of the main beam 2, and the reinforcing plate 7 is welded to the inside of the crossbeam 6. Then, the crossbeam 6 is snapped into the inside of the main beam 2 and attached to one side of the baffle 5. Then, the rivet 8 is inserted from the bottom of the main beam 2 upward into the connecting hole 12 and the fixing hole 11, so that the top of the rivet 8 protrudes from the top of the main beam 2. Then, the rivet 8 is squeezed and deformed by a stamping device, so that the main beam 2 and the crossbeam 6 are riveted and fixed by the rivet 8. The end beam 1 is fixedly installed at both ends of the main beam 2, and is also fixed by the rivet 8. Finally, the longitudinal beam 4 is attached. Place the bolt 31 at the bottom of the crossbeam 6, then insert the bolt 31 into the mounting hole 9 and the through hole 10, and then tighten the nut 34 to install and fix the longitudinal beam 4 and the crossbeam 6. When the crossbeam 6 is under great pressure during use, the crossbeam 6 will compress and deform the elastic cylinder 33, thereby increasing the expansion and contraction space between the crossbeam 6 and the longitudinal beam 4, and preventing the crossbeam 6 from deforming due to long-term large pressure. When disassembling, unscrew the nut 34 and cut the rivet 8 from the middle, so that the end beam 1, main beam 2, longitudinal beam 4 and crossbeam 6 can be disassembled, thus facilitating the disassembly and maintenance of the carriage underframe.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chassis frame connection structure for a carriage, comprising an end beam (1), characterized in that: A main beam (2) is installed on one side of the end beam (1), and a crossbeam (6) is installed on the inner side of the main beam (2). An elastic connector (3) is installed inside the crossbeam (6), and the elastic connector (3) includes a bolt (31). A washer (32) is sleeved on the outer wall of the top of the bolt (31), and an elastic sleeve (33) is sleeved on the outside of the bolt (31). A nut (34) is threaded on the outer wall of the bottom of the bolt (31), and a longitudinal beam (4) is installed on the outside of the bolt (31). A baffle (5) is welded on the inner side of the main beam (2), and a rivet (8) is installed on one side of the main beam (2).

2. The carriage underframe connection structure according to claim 1, characterized in that, The main beam (2) is symmetrically installed on both sides of the end beam (1), and the two end beams (1) and the two main beams (2) form a rectangular frame structure. The end beam (1) is pressed against one side of the baffle (5), and the end beam (1) is engaged inside the main beam (2). The end beam (1), the main beam (2) and the crossbeam (6) are all C-shaped steel.

3. The carriage underframe connection structure according to claim 1, characterized in that, The end beam (1) has support plates welded at equal intervals on its inner side, and the end beam (1) is fixedly installed to the main beam (2) by rivets (8). The longitudinal beam (4) has a rectangular cross section, and a through hole (10) is opened through the interior of the longitudinal beam (4). The bottom of the cross beam (6) has mounting holes (9) opened at equal intervals, and bolts (31) are inserted into the mounting holes (9) and the through holes (10).

4. The carriage underframe connection structure according to claim 1, characterized in that, The washer (32) is pressed between the bolt (31) and the crossbeam (6), and the elastic cylinder (33) is pressed between the crossbeam (6) and the longitudinal beam (4). The nut (34) is pressed at the bottom of the longitudinal beam (4). The elastic cylinder (33) is made of rubber.

5. The carriage underframe connection structure according to claim 1, characterized in that, The elastic connectors (3) are installed at equal intervals on the inner side of the crossbeam (6), the longitudinal beams (4) are installed at equal intervals on the bottom of the end beam (1) and the crossbeam (6), and the crossbeam (6) is engaged on the inner side of the main beam (2), and the baffles (5) are arranged at equal intervals on the inner side of the main beam (2).

6. The carriage underframe connection structure according to claim 1, characterized in that, One side of the crossbeam (6) is attached to one side of the baffle (5), and a reinforcing plate (7) is fixedly connected to the inner side of the crossbeam (6). The reinforcing plate (7) is symmetrically arranged on both sides of the elastic connector (3). Fixing holes (11) are opened through both sides of the crossbeam (6).

7. The carriage underframe connection structure according to claim 6, characterized in that, The main beam (2) and the crossbeam (6) are respectively provided with connecting holes (12). The connecting holes (12) and the fixing holes (11) are arranged perpendicular to each other, and the rivets (8) are inserted into the fixing holes (11) and the connecting holes (12). The main beam (2) is fixedly installed to the crossbeam (6) by the rivets (8).

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