Embedded connection composition structure for bottom plate of equipment compartment of motor train unit

Abstract

The utility model discloses a motor train unit equipment compartment base plate pre-embedded connection composition structure which comprises a drainage device and a base plate, the drainage device is installed on the top of the base plate, an installation plate is fixedly connected to the outer wall of the bottom end of the drainage device, an installation hole is formed in the installation plate, a pre-embedded connecting piece is fixedly connected to the interior of the base plate, and the installation hole is formed in the installation hole. A mounting hole is formed in the bottom plate, a bolt connecting sleeve is embedded in the position, corresponding to the mounting hole, of the embedded connecting piece, a bolt hole is formed in the bolt connecting sleeve in the axial direction, and the mounting plate and the bolt connecting sleeve are fixedly connected in the mode that a fixing bolt penetrates through the mounting hole and the bolt hole. The drainage device and the bottom plate are fixedly connected to the embedded connecting piece through the fixing bolts, mechanical connection between the drainage device and the bottom plate is achieved, the risk that the bottom plate and the drainage device are bonded and cracked is greatly reduced, and the stability and safety of connection between the bottom plate and the drainage device are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of the bottom plate of the equipment cabin of the EMU, in particular to a pre-buried connection composition structure of the bottom plate of the equipment cabin of the EMU. Background Technique

[0002] Some key components of the EMU are installed under the vehicle. When the EMU runs at high speed on the line, the air resistance is very large. Stones, ice blocks or other objects often collide with the equipment under the EMU at high speed accidentally due to the airflow. To protect the equipment under the EMU, reduce the air resistance and ensure the safe operation of the high-speed EMU, the bottom plate of the equipment cabin installed at the bottom of the vehicle can isolate and protect the equipment under the vehicle from the outside and achieve sealing.

[0003] The inventor found in daily work that since the bottom plate is made of glass fiber reinforced material (FRP), its material cannot be directly drilled and tapped, so the bottom plate and the drainage device are only bonded structures. The bottom plate is an important component under the vehicle. During the driving process of the vehicle, large positive and negative pressures will be generated according to different road conditions. This pressure is applied to the bottom plate, which affects the bonding between the bottom plate and the drainage device, and there is a risk of cracking at this position, resulting in problems that mass production and long-term operation of the vehicle will affect the driving safety. Therefore, it is necessary to design a pre-buried connection composition structure of the bottom plate of the equipment cabin of the EMU to improve the above problems. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a pre-buried connection composition structure of the bottom plate of the equipment cabin of the EMU, aiming to solve the problem that the existing bonding and fixing method between the drainage device and the bottom plate has a risk of cracking, resulting in problems that mass production and long-term operation of the vehicle will affect the driving safety.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pre-buried connection composition structure of the bottom plate of the equipment cabin of the EMU, including a drainage device and a bottom plate. The drainage device is installed on the top of the bottom plate. An installation plate is fixedly connected to the outer wall of the bottom end of the drainage device. Installation holes are provided on the installation plate. A pre-buried connecting piece is fixedly connected inside the bottom plate. A bolt connecting sleeve is embedded and installed at the position corresponding to the installation hole on the pre-buried connecting piece. A bolt hole is axially arranged in the bolt connecting sleeve. The installation plate and the bolt connecting sleeve are connected and fixed by a fixing bolt passing through the installation hole and the bolt hole.

[0007] As a preferred scheme of the utility model, the pre-buried connecting piece is integrally formed inside the bottom plate.

[0008] As a preferred scheme of the utility model, the pre-buried connecting piece is in a trapezoid structure, and the end with a smaller cross-section of the pre-buried connecting piece faces the drainage device.

[0009] As a preferred solution of the present utility model, a plurality of reinforcing grooves are provided around the outer wall of the embedded connecting piece.

[0010] As a preferred solution of the present utility model, one end of the bolt connecting sleeve passes through the embedded connecting piece and extends to the outside of the bottom plate.

[0011] As a preferred solution of the present utility model, a limiting groove is provided at the bottom of the mounting plate corresponding to the mounting hole, and the limiting groove is coaxially arranged with the mounting hole. The limiting groove is used for the part of the bolt connecting sleeve extending out of the bottom plate to be inserted in place.

[0012] As a preferred solution of the present utility model, the length of the part of the bolt connecting sleeve extending out of the bottom plate is less than the depth of the limiting groove.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] (1) In the present utility model, the embedded connecting piece is integrally formed in the bottom plate. The drainage device and the bottom plate are mechanically connected by a fixing bolt passing through the mounting hole on the mounting plate, then inserting into the bolt hole of the bolt connecting sleeve and tightening the fixing bolt, which greatly reduces the risk of cracking of the bond between the bottom plate and the drainage device, ensures the stability and safety of the connection between the bottom plate and the drainage device, further improves the service life, reduces the probability of failure at this position, and guarantees the overall stability and safety of the bottom plate of the EMU equipment cabin.

[0015] (2) In the present utility model, the part of the bolt connecting sleeve extending out of the bottom plate is used as a positioning convex part, and the limiting groove at the bottom of the mounting plate is used as a positioning concave part. When installing the drainage device and the bottom plate, the part of the bolt connecting sleeve extending out of the bottom plate is inserted into the limiting groove on the mounting plate in place to position the installation position of the drainage device, which greatly improves the installation efficiency and has high practicability. Description of the Drawings

[0016] Figure 1 It is a schematic three-dimensional structure diagram of the overall structure of the embedded connection component of the bottom plate of the EMU equipment cabin;

[0017] Figure 2 It is a schematic three-dimensional structure diagram of the bottom plate;

[0018] Figure 3 It is a schematic diagram of the bottom structure of the mounting plate;

[0019] Figure 4 It is a schematic sectional structure diagram of the bottom plate;

[0020] Figure 5 It is a schematic three-dimensional structure diagram of the embedded connecting piece.

[0021] In the figure: 1. Drainage device; 2. Mounting plate; 3. Bottom plate; 4. Fixing bolt; 5. Bolt connection sleeve; 501. Bolt hole; 6. Mounting hole; 601. Limit groove; 7. Embedded connecting piece; 701. Reinforcement groove. Specific embodiments

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment:

[0024] Please refer to Figures 1 - 5 , this embodiment provides a pre-embedded connection composition structure for the bottom plate of the equipment cabin of a bullet train, including a drainage device 1 and a bottom plate 3. The drainage device 1 is installed on the top of the bottom plate 3. An installation plate 2 is fixedly connected to the outer wall at the bottom end of the drainage device 1. An installation hole 6 is provided on the installation plate 2. An embedded connecting piece 7 is fixedly connected inside the bottom plate 3. The embedded connecting piece 7 is integrally formed inside the bottom plate 3. A bolt connection sleeve 5 is embedded and installed at the position corresponding to the installation hole 6 on the embedded connecting piece 7. A bolt hole 501 is axially arranged inside the bolt connection sleeve 5. The installation plate 2 and the bolt connection sleeve 5 are connected and fixed by a fixing bolt 4 passing through the installation hole 6 and the bolt hole 501.

[0025] Specifically, by providing the embedded connecting piece 7, the embedded connecting piece 7 is fixed inside the bottom plate 3 according to the dimensional requirements before the bottom plate 3 is formed. The forming methods of the embedded connecting piece 7 and the bottom plate 3 can adopt RIM injection molding at one time, dry pressing molding, etc., which not only ensures the accuracy of the installation position of the bottom plate 3 and the embedded connecting piece 7, but also saves a large amount of manpower and material resources, reduces costs, and improves the product quality of the bottom plate 3. After the bottom plate 3 is cured and formed, the drainage device 1 is placed on one side of the bottom plate 3 provided with the embedded connecting piece 7 according to the dimensions. The fixing bolt 4 is used to pass through the installation hole 6 on the installation plate 2, and then inserted into the bolt hole 501 inside the bolt connection sleeve 5 and the fixing bolt 4 is tightened to realize the mechanical connection between the drainage device 1 and the bottom plate 3, ensuring the stability and safety of the connection between the bottom plate 3 and the drainage device 1, guaranteeing the product quality, and improving the work efficiency.

[0026] In this embodiment, as Figure 4 and Figure 5As shown, the embedded connector 7 is in the shape of a frustum of a pyramid. The end with a smaller cross-section of the embedded connector 7 faces the drainage device 1. Through this structural design of the embedded connector 7, when the embedded connector 7 is integrally formed in the bottom plate 3, more materials of the bottom plate 3 are in contact with the side surface of the embedded connector 7, improving the stability of the embedded connector 7 in the bottom plate 3 to prevent the embedded connector 7 from detaching from the bottom plate 3.

[0027] In this embodiment, as Figure 4 and Figure 5 shown, a plurality of groups of reinforcing grooves 701 are provided around the outer wall of the embedded connector 7. Through the plurality of groups of reinforcing grooves 701 provided, when the embedded connector 7 is integrally formed in the bottom plate 3, the forming material of the bottom plate 3 fills into the reinforcing grooves 701, improving the anchoring performance between the embedded connector 7 and the bottom plate 3 and further enhancing the stability of the embedded connector 7 fixed in the bottom plate 3.

[0028] In this embodiment, as Figure 2 and Figure 3 shown, one end of the bolt connecting sleeve 5 passes through the embedded connector 7 and extends to the outside of the bottom plate 3. A limiting groove 601 is provided at the bottom of the mounting plate 2 corresponding to the mounting hole 6. The limiting groove 601 is coaxially arranged with the mounting hole 6. The limiting groove 601 is used for the part of the bolt connecting sleeve 5 extending out of the bottom plate 3 to be inserted in alignment. The length of the part of the bolt connecting sleeve 5 extending out of the bottom plate 3 is less than the depth of the limiting groove 601. The part of the bolt connecting sleeve 5 extending out of the bottom plate 3 can be used as a positioning convex part, while the limiting groove 601 at the bottom of the mounting plate 2 can be used as a positioning concave part. When the drainage device 1 is installed on the bottom plate 3, the part of the bolt connecting sleeve 5 extending out of the bottom plate 3 is inserted into the limiting groove 601 on the mounting plate 2 in alignment to position the installation position of the drainage device 1, greatly improving the installation efficiency and having high practicability.

[0029] Working principle: When installing the drainage device 1 and the bottom plate 3, the part of the bolt connection sleeve 5 extending out of the bottom plate 3 is inserted into the limit groove 601 on the mounting plate 2 in alignment to position the installation location of the drainage device 1. Then, the fixing bolt 4 is passed through the mounting hole 6 on the mounting plate 2 and inserted into the bolt hole 501 of the bolt connection sleeve 5, and the fixing bolt 4 is tightened to achieve the mechanical connection between the drainage device 1 and the bottom plate 3, ensuring the stability and safety of the connection between the bottom plate 3 and the drainage device 1. Among them, the embedded connector 7 is integrally formed in the bottom plate 3. The embedded connector 7 is in a trapezoid structure, and the end with a smaller cross-section of the embedded connector 7 faces the drainage device 1. More materials of the bottom plate 3 are in contact with the side surface of the embedded connector 7, improving the stability of the embedded connector 7 in the bottom plate 3. The molding material of the bottom plate 3 fills into the reinforcement groove 701, improving the anchoring performance between the embedded connector 7 and the bottom plate 3, further enhancing the stability of the fixed embedded connector 7 in the bottom plate 3 to prevent the embedded connector 7 from detaching from the bottom plate 3, improving the product quality of the bottom plate 3 and ensuring the product quality.

[0030] The above embodiments are the preferred implementation schemes of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A pre-buried connection structure for a bottom plate of an EMU equipment compartment, comprising a drainage device (1) and a bottom plate (3), characterized in that: The drainage device (1) is installed on the top of the base plate (3); a mounting plate (2) is fixedly connected to the outer wall of the bottom end of the drainage device (1); a mounting hole (6) is provided on the mounting plate (2); an embedded connecting piece (7) is fixedly connected inside the base plate (3); a bolt connection sleeve (5) is embedded and installed at a position corresponding to the mounting hole (6) on the embedded connecting piece (7); a bolt hole (501) is axially provided inside the bolt connection sleeve (5); the mounting plate (2) and the bolt connection sleeve (5) are connected and fixed by fixing bolts (4) passing through the mounting hole (6) and the bolt hole (501).

2. The pre-buried connection structure of the EMU equipment compartment bottom plate according to claim 1 is characterized in that: The embedded connecting piece (7) is integrally formed inside the base plate (3).

3. The pre-buried connection structure of the EMU equipment compartment bottom plate according to claim 1 is characterized in that: The embedded connection piece (7) is a trapezoidal structure, and the end of the embedded connection piece (7) with a smaller cross section faces the drainage device (1).

4. The pre-buried connection structure of the EMU equipment compartment bottom plate according to claim 3 is characterized in that: The outer wall of the embedded connecting piece (7) is provided with a plurality of groups of reinforcement grooves (701) around its periphery.

5. The pre-buried connection structure of the EMU equipment compartment bottom plate according to claim 1 is characterized in that: One end of the bolt connection sleeve (5) passes through the embedded connection piece (7) and extends to the outside of the base plate (3).

6. The pre-buried connection structure of the EMU equipment compartment bottom plate according to claim 3 is characterized in that: A limiting groove (601) is provided at the bottom of the mounting plate (2) and corresponding to the mounting hole (6). The limiting groove (601) is coaxially arranged with the mounting hole (6). The limiting groove (601) is used for the portion of the bolt connection sleeve (5) extending out of the bottom plate (3) to be inserted in alignment.

7. The pre-buried connection structure of the EMU equipment compartment bottom plate according to claim 6 is characterized in that: The length of the portion of the bolt connection sleeve (5) extending out of the bottom plate (3) is less than the depth of the limiting groove (601).

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