An end forming die and an end structure of a rail transit vehicle

Abstract

The utility model discloses an end portion forming die and the end portion structure of rail transit vehicle relates to rail transit vehicle manufacturing technical field, and the end portion forming die includes forming outer die and capsule inner die, and the forming outer die includes the side mould, end mould and bottom die of splicing connection, and the end mould is fixed in one end of side mould, and the bottom die is fixed in the bottom of side mould, the inside profile of side mould is in accord with the outside profile of both side wall and roof respectively, and the end profile of end mould is in accord with the outside end profile of side wall, and the bottom profile of bottom die is in accord with the outside bottom profile of chassis, and the capsule inner die is located in the forming die cavity of forming outer die, and the outside profile of capsule inner die is in accord with the inside profile of end portion structure. Since the end portion structure is the integrally formed structure, the cracking problem caused by stress concentration of the connecting part of traditional split structure is avoided, and the rigidity of end portion structure is effectively improved, thereby prolonging the service life of end portion structure.

Description

Technical Field

[0001] This utility model relates to the field of rail transit vehicle manufacturing technology, and in particular to an end forming mold and an end structure of a rail transit vehicle. Background Technology

[0002] Taking subways and high-speed trains as examples, the end structure of traditional rail transit vehicles typically consists of four components: end walls, side walls, roof, and underframe. During the manufacturing process, these components must first be positioned using specialized fixtures, and then assembled into a whole using welding or bolting.

[0003] However, due to the split design of the end structure, the connection points between adjacent components are not integrally formed, such as the corners of the end wall and side wall or the interface between the end wall and the base frame. During long-term operation, stress concentration may occur at the connection points due to vibration or impact loads. Long-term alternating stress can cause cracking or fatigue damage at the weld or bolt connections, seriously affecting the service life of the end structure. Utility Model Content

[0004] The purpose of this utility model is to provide an end forming mold and an end structure for rail transit vehicles. The end structure is an integral structure, which effectively improves the rigidity of the end structure and solves the technical problem that the service life of existing end structures is affected by the easy cracking of the connection parts.

[0005] To achieve the above objectives, this utility model provides an end forming mold for an end structure formed by an end wall, side wall, roof, and underframe; the end forming mold includes:

[0006] The forming outer mold includes a side mold, an end mold, and a bottom mold that are spliced ​​together. The end mold is fixed at one end of the side mold, and the bottom mold is fixed at the bottom of the side mold. The inner surface of the side mold matches the outer contour of the side wall and the roof, respectively. The end surface of the end mold matches the outer end contour of the side wall, and the bottom surface of the bottom mold matches the outer bottom contour of the chassis.

[0007] The inner mold of the capsule is located inside the molding cavity of the outer mold, and the outer surface of the inner mold matches the inner contour of the end structure.

[0008] In some embodiments, the side mold includes a left side mold and a right side mold arranged symmetrically, and the inner surfaces of the left side mold and the right side mold are smoothly connected to form an inner profile.

[0009] In some embodiments, both the left and right molds have protruding side door bosses on their inner surfaces, which are used to form side door openings on the side walls.

[0010] In some embodiments, the end profile protrusion is formed with an end boss, which is used to form an end door opening in the end wall.

[0011] In some embodiments, a forming groove is formed on the bottom profile, the forming groove being used to protrude at the bottom of the base frame to form a base frame side beam.

[0012] In some embodiments, an inflation tube is connected to the outer surface of the capsule inner mold, and the inflation tube is equipped with an inflation pump; further comprising:

[0013] Pressure sensing element, used to detect the current air pressure inside the capsule mold;

[0014] The controller is connected to both the pressure sensor and the air pump. The controller is used to shut down the air pump when the current air pressure reaches the set air pressure, based on the signal fed back by the pressure sensor.

[0015] In some embodiments, it also includes:

[0016] Gap inspection piece, used to inspect the width of the gap between the molding cavity and the outer surface;

[0017] The mold feeding assembly is connected to the capsule inner mold and is used to feed the capsule inner mold into the molding cavity and define the position of the capsule inner mold in the molding cavity.

[0018] Both the gap detection component and the mold feeding assembly are connected to the controller. The controller is used to start the mold feeding assembly to adjust the position of the capsule inner mold in the molding cavity when the gap width does not reach the set width, based on the signal fed back by the gap detection component.

[0019] This utility model also provides an end structure for a rail transit vehicle, applied to the aforementioned end forming mold, including an end wall, side wall, roof, and underframe, which together form an integrated structure; the integrated structure includes an outer skin, an inner skin, and reinforcing ribs connecting the outer skin and the inner skin, with a trapezoidal cavity formed between two adjacent reinforcing ribs, and the trapezoidal cavity is filled with foam blocks.

[0020] In some embodiments, the reinforcing ribs of both the end wall and the side wall are vertical reinforcing ribs, which are arranged at an angle to the side of the vehicle body and are staggered along the longitudinal direction of the vehicle body.

[0021] The roof and the underframe are both reinforced with longitudinal ribs, which are inclined vertically relative to the vehicle body and staggered laterally.

[0022] In some embodiments, both the outer skin and the inner skin are carbon fiber components.

[0023] Compared to the prior art, this utility model designs an end-forming mold. During manufacturing, the end mold is first fixed to the end of the side mold, and then the bottom mold is installed at the bottom of the side mold, assembling a complete outer mold. Subsequently, the capsule-shaped inner mold is inserted into the forming cavity of the outer mold. After applying mold-closing pressure, the inner surface of the side mold forms the outer contours of the sidewalls and roof, the end surface of the end mold forms the outer end contour of the sidewalls, the bottom surface of the bottom mold forms the outer bottom contour of the chassis, and the outer surface of the capsule-shaped inner mold forms the inner contour of the end structure. Because the end structure is a one-piece molded structure, it avoids the cracking problem caused by stress concentration at the connection points in traditional split structures, effectively improving the rigidity of the end structure and thus extending its service life. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 A schematic diagram of the end forming mold provided in an embodiment of this utility model;

[0026] Figure 2 for Figure 1 Exploded view of the outer mold for intermediate forming;

[0027] Figure 3 A schematic diagram of the end structure processed by the end forming mold provided in this embodiment of the utility model;

[0028] Figure 4 for Figure 1 Cross-sectional schematic diagrams of the middle wall and the side walls;

[0029] Figure 5 for Figure 1 Cross-sectional schematic diagram of the roof and underframe of the CRRC.

[0030] The attached figures are labeled as follows:

[0031] End structure 1, outer mold 2, and capsule inner mold 3;

[0032] Outer skin 100, inner skin 101, reinforcing rib 102 and foam block 103;

[0033] Vertical stiffener 1021 and longitudinal stiffener 1022;

[0034] End wall 11, side wall 12, roof 13 and underframe 14;

[0035] Side doorway 121;

[0036] End door opening 111;

[0037] Base frame side beam 141;

[0038] Side mold 21, end mold 22 and bottom mold 23;

[0039] Left mold 211, right mold 212 and side door boss 213;

[0040] End boss 221;

[0041] Forming groove 231;

[0042] Inflation tube 31. Detailed Implementation

[0043] 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.

[0044] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] This utility model embodiment discloses an end forming mold for manufacturing end structure 1, as shown in the attached figure. Figure 1 As shown, the end structure 1 is composed of four parts: end wall 11, side wall 12, roof 13 and underframe 14.

[0046] As attached Figure 1 As shown, the end forming mold includes an outer forming mold 2 and an inner capsule mold 3. The outer forming mold 2 includes a side mold 21, an end mold 22, and a bottom mold 23 that are spliced ​​together. The end mold 22 is fixed to one end of the side mold 21, and the bottom mold 23 is fixed to the bottom of the side mold 21. The inner surface of the side mold 21 matches the outer contours of the side wall 12 and the roof 13, respectively. The end surface of the end mold 22 matches the outer end contour of the side wall 12, and the bottom surface of the bottom mold 23 matches the outer bottom contour of the chassis 14. It should be noted that, considering that the side wall 12 and the roof 13 are smoothly connected by an arc surface, the inner surface of the side mold 21 includes a left side surface, a right side surface opposite to the left side surface, and a top side surface perpendicularly connected between the left and right side surfaces. The left side surface and the top side surface are smoothly connected by an arc surface, and the right side surface and the top side surface are also smoothly connected by an arc surface.

[0047] The inner capsule mold 3 is an inflatable capsule structure. The inner capsule mold 3 is located in the molding cavity of the outer molding mold 2. The outer surface of the inner capsule mold 3 matches the inner contour of the end structure 1.

[0048] During the manufacturing process, the end mold 22 is first fixed to the end of the side mold 21, and then the bottom mold 23 is installed at the bottom of the side mold 21 to assemble a complete outer mold 2. Subsequently, the capsule inner mold 3 is inserted into the molding cavity of the outer mold 2. After applying the mold closing pressure, the inner surface of the side mold 21 forms the outer contour of the side wall 12 and the roof 13, the end surface of the end mold 22 forms the outer end contour of the side wall 12, the bottom surface of the bottom mold 23 forms the outer bottom contour of the chassis 14, and the outer surface of the capsule inner mold 3 forms the inner contour of the end structure 1.

[0049] The end structure 1 manufactured by the end forming mold of this utility model is an integrally formed structure, which avoids the cracking problem caused by stress concentration at the connection part of the traditional split structure, effectively improves the rigidity of the end structure 1, and thus extends the service life of the end structure 1.

[0050] To achieve lightweight design, the end structure 1 is a carbon fiber structure. After assembling the outer mold 2, carbon fiber prepreg is first laid on the inner molding surface of the molding cavity of the outer mold 2. Then, reinforcing ribs 102 and foam blocks 103 are laid on the carbon fiber prepreg according to the design requirements. Then, carbon fiber prepreg is laid on the outer surface of the inner mold 3. The inner mold 3 with carbon fiber prepreg is sent into the molding cavity. The inner mold 3 is inflated to tightly bond the reinforcing ribs 102 and foam blocks 103 between the two carbon fiber prepregs. Finally, the whole structure is heated and dried. The two carbon fiber prepregs form the outer skin 100 and the inner skin 101 respectively, realizing the one-piece molding of the end structure 1.

[0051] As a preferred embodiment, as shown in the appendix Figure 1 and 2 As shown, the side mold 21 has a split structure, which facilitates handling and processing. Specifically, the side mold 21 includes a left side mold 211 and a right side mold 212 arranged symmetrically, and the inner surfaces of the left side mold 211 and the right side mold 212 are smoothly connected to form an inner profile.

[0052] As a preferred embodiment, as shown in the appendix Figure 1 and 2 As shown, both the left mold 211 and the right mold 212 have protruding side door bosses 213 on their inner surfaces. These side door bosses 213 form side door openings 121 on the side wall 12, eliminating the need for subsequent machining of the side door openings 121 on the side wall 12, thus simplifying manufacturing and increasing machining precision. Alternatively, other protruding structures, such as wiring protrusions, can be added to the inner surfaces of the left mold 211 and the right mold 212, allowing for the direct integral machining of wiring grooves on the side wall 12, simplifying subsequent processing.

[0053] As a preferred embodiment, as shown in the appendix Figure 1 and 2 As shown, the end face protrusion forms an end boss 221, which is used to form an end door opening 111 on the end wall 11. This eliminates the need to subsequently machine the end door opening 111 on the end wall 11, which is beneficial to improving machining efficiency and machining accuracy.

[0054] As a preferred embodiment, as shown in the appendix Figure 1 and 2 As shown, a forming groove 231 is formed on the bottom surface. The forming groove 231 is used to form a base frame side beam 141 by protruding at the bottom of the base frame 14. This eliminates the need for subsequent milling and slotting on the base frame 14 and avoids the machining errors caused by the secondary clamping of the end structure 1, thus significantly improving both machining efficiency and machining accuracy.

[0055] In a preferred embodiment, the capsule inner mold 3 is externally connected to an inflation pipe 31, which is equipped with an inflation pump for inflating gas into the capsule inner mold 3. The end forming mold also includes a pressure detection element connected to a controller, which is used to detect the current air pressure of the capsule inner mold 3, specifically a pressure sensor.

[0056] When the pressure detection device detects that the current air pressure of the inner mold 3 of the capsule has reached the set air pressure, the pressure detection device sends a signal to the controller. After judgment and processing, the controller sends an execution command to the air pump, which automatically shuts down the air pump and realizes automatic stop of inflation. This ensures that the inner mold 3 of the capsule maintains a constant pressure, avoids the instability of the pressure of the inner mold 3 of the capsule from affecting the molding quality, and helps to improve the processing accuracy.

[0057] In a preferred embodiment, the end forming mold further includes a gap detection component and a mold feeding assembly, both connected to the controller. The gap detection component, specifically a distance sensor, is used to inspect the gap width between the forming cavity and the outer surface. The mold feeding assembly is connected to the inner capsule mold 3 and is used to feed the inner capsule mold 3 into the forming cavity and define its position within the cavity. The mold feeding assembly has at least three degrees of freedom, such as a robotic arm, enabling adjustment of the inner capsule mold 3's position in multiple directions for precise positioning.

[0058] When the gap detection component detects that the gap width between the molding cavity and the outer surface does not reach the set width, it means that the capsule inner mold 3 has not been delivered in place. The gap detection component sends a signal to the controller. After judgment and processing, the controller sends an execution command to the mold feeding assembly. The mold feeding assembly adjusts the position of the capsule inner mold 3 in the molding cavity, so that the capsule inner mold 3 can achieve automatic and precise positioning with high positioning accuracy, effectively improving the processing accuracy.

[0059] It should be noted that the controller should include a signal receiving unit, a signal judging unit, and a signal transmitting unit. The signal receiving unit receives electrical signals sent by detection components such as pressure detection devices or gap detection devices. The signal judging unit is electrically connected to the signal receiving unit so that it can determine whether the signal received by the signal receiving unit is a trigger signal. The signal transmitting unit is electrically connected to the signal judging unit so that it can send the judgment signal generated by the signal judging unit to the actuating components such as the air pump or mold feeding assembly. The specific arrangement of the signal receiving unit, signal judging unit, and signal transmitting unit can refer to the prior art; in this utility model, only the application scenario of the above three components has been changed, and no substantial improvement has been made. Obviously, controllers with this structure are widely used in existing automatic control equipment, such as MCUs, DSPs, or single-chip microcomputers. The key point of this utility model is that the controller combines each detection component and each actuating component in a pairwise correspondence.

[0060] This utility model also provides an end structure for a rail transit vehicle, applied to the aforementioned end forming mold, as shown in the attached figure. Figure 3 As shown, the end structure 1 includes an end wall 11, side walls 12, roof 13, and underframe 14, which together form an integrated structure. This integrated structure includes an outer skin 100, an inner skin 101, and reinforcing ribs 102 connecting the outer skin 100 and the inner skin 101, used to enhance the rigidity of the end structure 1. A trapezoidal cavity is formed between adjacent reinforcing ribs 102, and the trapezoidal cavity is filled with foam blocks 103. The foam blocks 103 are used to achieve vibration isolation and noise reduction, improving the comfort of the end structure 1.

[0061] As a preferred embodiment, considering the different loads borne by different parts of the end structure 1, the distribution of the reinforcing ribs 102 is optimized. Specifically, as shown in the attached figure... Figure 4 As shown, the reinforcing ribs 102 of both end wall 11 and side wall 12 are vertical reinforcing ribs 1021. These vertical reinforcing ribs 1021 are arranged at an angle to the side of the vehicle body and are staggered along the longitudinal direction of the vehicle body to enhance the rigidity of both end wall 11 and side wall 12. (See attached diagram) Figure 5 The reinforcing ribs 102 of the roof 13 and the underframe 14 shown are longitudinal reinforcing ribs 1022. The longitudinal reinforcing ribs 1022 are inclined vertically relative to the vehicle body and staggered laterally to improve the rigidity of the roof 13 and the underframe 14.

[0062] As a preferred embodiment, both the outer skin 100 and the inner skin 101 are carbon fiber components, which makes the end structure 1 lighter and provides conditions for the integral molding of the end structure 1.

[0063] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0064] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An end forming mold, characterized in that, For an end structure formed by an end wall (11), a side wall (12), a roof (13), and a chassis (14); the end forming mold includes: The outer mold (2) includes a side mold (21), an end mold (22) and a bottom mold (23) that are spliced ​​together. The end mold (22) is fixed to one end of the side mold (21), and the bottom mold (23) is fixed to the bottom of the side mold (21). The inner surface of the side mold (21) matches the outer contours of the side wall (12) and the roof (13), respectively. The end surface of the end mold (22) matches the outer end contour of the side wall (12), and the bottom surface of the bottom mold (23) matches the outer bottom contour of the chassis (14). The inner mold (3) of the capsule is located in the molding cavity of the outer mold (2), and the outer surface of the inner mold (3) matches the inner contour of the end structure.

2. The end forming mold according to claim 1, characterized in that, The side mold (21) includes a left side mold (211) and a right side mold (212) arranged symmetrically. The inner surfaces of the left side mold (211) and the right side mold (212) are smoothly connected to form the inner side surface.

3. The end forming mold according to claim 2, characterized in that, Both the left mold (211) and the right mold (212) have protrusions on their inner surfaces to form side door bosses (213), which are used to form side door openings (121) on the side wall (12).

4. The end forming mold according to any one of claims 1 to 3, characterized in that, The end face protrusion is formed with an end boss (221), which is used to form an end door opening (111) on the end wall (11).

5. The end forming mold according to any one of claims 1 to 3, characterized in that, The bottom surface is formed with a molding groove (231), which is used to form a base frame side beam (141) by protruding at the bottom of the base frame (14).

6. The end forming mold according to any one of claims 1 to 3, characterized in that, The capsule inner mold (3) is externally connected to an inflation tube (31), and the inflation tube (31) is equipped with an inflation pump; it also includes: A pressure detection element, which is used to detect the current air pressure of the capsule inner mold (3); The controller is connected to both the pressure sensor and the air pump. The controller is used to shut down the air pump when the current air pressure reaches the set air pressure, based on the signal fed back by the pressure sensor.

7. The end forming mold according to claim 6, characterized in that, Also includes: A gap detection component, used to inspect the gap width between the molding cavity and the outer surface; A mold feeding assembly is connected to the capsule inner mold (3). The mold feeding assembly is used to feed the capsule inner mold (3) into the molding cavity and to define the position of the capsule inner mold (3) in the molding cavity. Both the gap detection component and the mold feeding assembly are connected to the controller. The controller is used to start the mold feeding assembly to adjust the position of the capsule inner mold (3) in the molding cavity when the gap width does not reach the set width, based on the signal fed back by the gap detection component.

8. An end structure for a rail transit vehicle, characterized in that, The end forming mold applied to any one of claims 1 to 7 includes an end wall (11), a side wall (12), a roof (13), and a base frame (14), which together form an integral structure; the integral structure includes an outer skin (100), an inner skin (101), and a reinforcing rib (102) connecting the outer skin (100) and the inner skin (101), with a trapezoidal cavity formed between two adjacent reinforcing ribs (102), and the trapezoidal cavity is filled with a foam block (103).

9. The end structure of the rail transit vehicle according to claim 8, characterized in that, The reinforcing ribs (102) of both the end wall (11) and the side wall (12) are vertical reinforcing ribs (1021). The vertical reinforcing ribs (1021) are arranged at an incline relative to the vehicle body and are staggered along the longitudinal direction of the vehicle body. The reinforcing ribs (102) of the roof (13) and the underframe (14) are longitudinal reinforcing ribs (1022), which are inclined vertically relative to the vehicle body and staggered along the transverse direction.

10. The end structure of the rail transit vehicle according to claim 8, characterized in that, Both the outer skin (100) and the inner skin (101) are carbon fiber components.

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