Mounting structure and mounting method for lower converter of rail transit vehicle

Abstract

The invention belongs to the field of rail transit, and particularly discloses an under-vehicle converter mounting structure and method for rail transit, and the under-vehicle converter mounting structure comprises an air outlet door plate assembly, an air inlet door plate assembly, a bearing frame assembly, a rotating clamping seat assembly, a converter fixing frame, a round pipe fixing frame assembly and a bottom side baffle. The rapid dismounting and accurate positioning of the built-in converter are realized; meanwhile, the invention discloses an installation method of the converter installation structure. Compared with the prior art, the problems of box welding deformation, inaccurate positioning and large tolerance are solved; and meanwhile, the converter in the box can be quickly, safely and reliably mounted and dismounted through a simple tool.

Description

Technical Field

[0001] The invention belongs to the field of rail transit, and in particular to a mounting structure and a mounting method of a converter under a rail transit vehicle. Background Art

[0002] At present, the rail transit field is striving towards the goal of reducing energy consumption and weight of electrical equipment, which requires corresponding equipment (such as traction or auxiliary converters) to be light in weight, compact in structure, and easy to maintain and repair; in order to adapt to a variety of application scenarios, such as installing the converter on the vehicle (in the carriage, the IP protection level of the equipment is low) or installing the converter under the vehicle or on the roof, the protection level is required to be higher; a small-sized, light-weight, low-IP protection-level converter can be designed, which can be used in the cabinet inside the carriage, or can be installed in an outdoor box with a high IP protection level to achieve installation on the roof or under the vehicle; such a design is conducive to the converter being able to adapt to a variety of installation environments, and is conducive to reducing its own weight and manufacturing cost after mass production;

[0003] If conventional inverters are to be compatible with a variety of installation environments, the simplest way is to make the inverter into a compact, miniaturized outdoor protection structure with a protection level of IP65, for example, to meet the environmental requirements of installation under the vehicle, on the roof, and inside the vehicle compartment. However, compared with the inverter with an IP22 protection level, this structure is slightly insufficient in size, weight, and cost. When used under the vehicle or on the roof, the disadvantage is that some functions need to be realized through the installation of other boxes, and all functional sets cannot be fully formed. In addition, if an inverter with an IP22 protection level is used and directly installed in an IP65 protection box, its disadvantage is that the heat generated by the forced air cooling of the inverter cannot be 100% discharged from the IP65 protection box, causing the heat to gradually accumulate inside the box, reducing the heat dissipation capacity of the inverter, and then causing downtime, forming a potential danger. Summary of the invention

[0004] The purpose of the present invention is to provide a mounting structure and method for a converter under a rail transit vehicle, which solves the problems of box body welding deformation, inaccurate positioning, and large tolerance; at the same time, the converter in the box can be installed and removed quickly, safely, and reliably.

[0005] The technical solution to achieve the purpose of the present invention is:

[0006] A converter installation structure under a rail transit vehicle comprises a box body, an air outlet door panel assembly, an air inlet door panel assembly, a support bracket assembly, a built-in converter, a rotating card seat assembly, a converter fixing frame, a round tube fixing frame assembly, and a bottom side baffle; the air outlet door panel assembly and the air inlet door panel assembly are installed on the box body, the support bracket assembly is used to support the built-in converter during maintenance or assembly, the rotating card seat assembly is fixed on the box body, and the rotating card seat assembly is used to support and limit the support rod assembly on the support bracket assembly; the converter fixing frame is used for the built-in converter, the fixed round tube fixing frame assembly is used to cooperate with the support bracket assembly, and then the built-in converter is transported into the box body or pulled out of the box body, and the bottom side baffle is symmetrically installed on the inner side of the round tube fixing frame assembly, and is used for guiding and limiting the position of the built-in converter during installation.

[0007] A method for installing a mounting structure of a converter under a rail transit vehicle, the specific steps are:

[0008] Step 1: Rivet the converter fixing frame, the round tube fixing frame assembly, the positioning pin contact plate, and the bottom side baffle to the bottom area of ​​the box; fasten the rotating card seat assembly to the bottom front area of ​​the box; assemble the built-in converter;

[0009] Step 2: Rotate the support rod assembly toward the support plate until it fits on the edge of the support plate, and then pull the support rod assembly toward the end close to the limit bracket. The middle rod of the support rod gradually approaches the half-notch of the support plate. When the middle rod of the support rod assembly slides and contacts the limit spring plate, continue to pull it to the bottom. The wave-shaped groove of the limit spring plate elastically suppresses the middle rod of the support rod.

[0010] Step 3, first rotate the flip card plate in the rotating card seat assembly upward and flip it; push the support rod assembly away from the limit bracket. When it is pushed to the side spring stop assembly, the toggle rod cooperates with the round hole on the upper end of the mounting plate to limit the support rod assembly and cannot be pushed further; at this point, the front and rear distance of the support rod assembly is locked at the installation position of the side spring stop assembly; at this time, the support rod assembly cannot move forward and backward, and can only be operated to rotate the support rod up and down;

[0011] Step 4: Insert the outer round steel of the support frame of the support frame assembly into the round tube fixing frame assembly, insert the middle rod of the support rod assembly into the waist groove notch of the flip card seat, and then turn the flip card plate downward, so that the middle rod of the support rod of the support rod assembly can be wrapped and limited forward and backward; at the same time, combine the insertion and locking of the side spring stop assembly and the support rod assembly in the previous step, and finally limit the support frame assembly;

[0012] Step 5: First, press down and rotate the toggle piece on the support bracket assembly to fit it on the limit bracket, and then have two people lift the built-in converter and place it on the upper end of the support bracket assembly, and then push the built-in converter into the box; with the help of the converter fixing frame and the bottom side baffle, the built-in converter is pushed in and installed;

[0013] Step 6: Rotate the flip card plate upwards and then pull out the support bracket assembly;

[0014] Step 7, hang up the air outlet door panel assembly, and then push it inward. When the first spring pin of the air outlet contacts the inclined area of ​​the air outlet stop plate, the spring begins to compress, and then shrinks and slides, and when it reaches the circular hole area of ​​the air outlet stop plate, it is bounced in and locked; at the same time, the edge of the vent hood assembly presses into the air outlet sealing strip to form a seal around the cylinder, with the effect of penetrating the middle;

[0015] Step 8. Similarly, hang up the air inlet door panel assembly, push it in and fasten it with the door lock, and the installation of the entire under-vehicle inverter equipment is completed.

[0016] Compared with the prior art, the present invention has the following significant advantages: the present invention has light weight, compact structure, tolerant sealing design, simple auxiliary tooling, and realizes the heat dissipation effect of direct exhaust air; it can effectively solve the problems of box welding deformation, inaccurate positioning, and large tolerance; it can quickly, safely, and reliably install and disassemble the inverter in the box; through simple, reliable, and light auxiliary tooling, the demand for maintenance personnel and safety during operation are reduced, and combined with various environmental and cost considerations, each tooling can be equipped or conveniently carried and stored as an independent tooling; by utilizing the sliding spring plug-in locking structure, the airtight locking at the air outlet is quickly achieved; the overall structure greatly reduces the number of mounting bolts and improves operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Undercar converter stereo Figure 1 ;

[0018] Figure 2 Undercar converter stereo Figure 2 ;

[0019] Figure 3 Schematic diagram of the internal converter 5 being pulled out and stopped;

[0020] Figure 4 Schematic diagram of the internal converter 5 being pulled out and stopped (partially enlarged);

[0021] Figure 5 A three-dimensional view of the inside of the air outlet door panel assembly 2;

[0022] Figure 6A three-dimensional view of the inner side of the air outlet door panel assembly 2 (partially enlarged view);

[0023] Figure 7 Exploded view of air outlet door panel assembly 2;

[0024] Figure 8 A three-dimensional view of the outside of the air inlet door panel assembly 3;

[0025] Fig. 9 Exploded view of air inlet door panel assembly 3;

[0026] Fig.10 A perspective view of the outer side of the support bracket assembly 4;

[0027] Fig.11 The inner side of the support bracket assembly 4 is three-dimensional Figure 1 ;

[0028] Fig.12 The inner side of the support bracket assembly 4 is three-dimensional Figure 2 ;

[0029] Fig.13 An exploded view of the support bracket assembly 4;

[0030] Fig.14 Schematic diagram of the circular tube notch avoidance portion 4-4-1;

[0031] Fig.15 A perspective view of the rear spring stop assembly 4-8;

[0032] Fig.16 A three-dimensional view of the side spring stop assembly 4-9 (compressed spring state);

[0033] Fig.17 A three-dimensional view of the side spring stop assembly 4-9 (natural state);

[0034] Fig.18 A partial schematic diagram of a support rod assembly 4-7;

[0035] Fig.19 4-7-2 stereogram of the round tube 1 assembly;

[0036] Fig. 20 A three-dimensional view of the internal converter 5;

[0037] Fig.21 Exploded view of the internal converter 5;

[0038] Fig. 22 A three-dimensional view of the ventilation hood assembly 5-1;

[0039] Fig.23 A three-dimensional diagram of the air outlet stop plate 5-1-1;

[0040] Fig.24 View of the air outlet of the internal inverter 5;

[0041] Fig.25 View of the air inlet of the built-in converter 5 (fan port);

[0042] Fig.26 A three-dimensional view of the rotating card seat assembly 6;

[0043] Fig. 27 Schematic diagram of the internal installation of box 1;

[0044] Fig.28 Round tube fixing frame assembly 8 (left-right symmetrical part);

[0045] Fig.29 A three-dimensional view of the bottom side baffle 10 (left-right symmetrical member);

[0046] Fig.30 Internal converter 5-bolt fastening diagram;

[0047] Fig.31 Schematic diagram of the support frame assembly 4 (long-term storage state) pulled into place;

[0048] Fig.32 Schematic diagram of the support frame assembly 4 (long-term storage state) in a retracted state;

[0049] Fig.33 The flat rubber strip 3-3 compresses the stop support bracket assembly 4;

[0050] Fig.34 Installation perspective view of the air outlet door panel assembly 2 and the ventilation cover assembly 5-1;

[0051] Fig.35 A front view of the air outlet door panel assembly 2;

[0052] Fig.36 The air outlet spring pin 2-3 is in contact with the air outlet stop plate 5-1-1. Figure 1

[0053] Fig.37 Schematic diagram of the wrapping state of the positioning pin contact plate 9 and the bracket positioning pins 4-5;

[0054] Fig.38 The air outlet spring pin 2-3 is in contact with the air outlet stop plate 5-1-1. Figure 2 ;

[0055] Fig.39 The air outlet spring pin 2-3 is in contact with the air outlet stop plate 5-1-1. Figure 2 (Partial enlarged image);

[0056] Fig.40 Schematic diagram of the gap stop setting between the rubber strip sealing cover 2-4 and the air outlet stop plate 5-1-1;

[0057] Fig.41 Schematic diagram of the gap between the converter mounting foot 5-2 and the bottom side baffle 10;

[0058] Fig.42 Support bracket assembly 4 assembly step 1 (preparation for inserting the round tube);

[0059] Fig.43 Support bracket assembly 4 assembly step 2 (inserting into the round tube);

[0060] Fig.44 Support bracket assembly 4 assembly step 3 (completing the oblique triangle support);

[0061] Fig.45 Schematic diagram of the built-in converter 5 placed on the support bracket assembly 4;

[0062] Fig.46 The inverter mounting foot 5-2 is overlapped with the inverter fixing frame 7. Figure 1 ;

[0063] Fig.47 The inverter mounting foot 5-2 is overlapped with the inverter fixing frame 7. Figure 2 ;

[0064] Fig.48 The inverter mounting foot 5-2 is overlapped with the inverter fixing frame 7. Figure 3 ;

[0065] Fig.49 The inverter mounting foot 5-2 is overlapped with the inverter fixing frame 7. Figure 4 ;

[0066] Fig.50 Schematic diagram of the matching relationship between the module bottom side baffle 5-3 and the insulating slide plate 4-2. DETAILED DESCRIPTION

[0067] The terms used in the present invention are only for the purpose of illustrating the embodiments of the present invention and are not intended to limit the present invention. Figure 1-49 , some embodiments of the present invention are described in detail.

[0068] Example 1

[0069] The present invention discloses a rail transit vehicle undercarriage inverter installation structure, which mainly comprises: a box body 1, an air outlet door panel assembly 2, an air inlet door panel assembly 3, a support frame assembly 4, an internal inverter 5, a rotating card seat assembly 6, an inverter fixing frame 7, a round tube fixing frame assembly 8 (left-right symmetrical parts), and a bottom side baffle 10 (left-right symmetrical parts);

[0070] Box body 1: Made of aluminum alloy material, it is formed by blanking, cutting, bending, and then welded and riveted in some areas; the box body 1 mainly provides installation positions for the rotating card seat assembly 6, the converter fixing frame 7, the round tube fixing frame assembly 8 (left-right symmetrical parts), the positioning pin contact plate 9, and the bottom side baffle 10 (left-right symmetrical parts);

[0071] Air outlet door panel assembly 2: including air outlet spring mounting frame 2-1, air outlet cover panel 2-2, air outlet first spring pin 2-3, rubber strip sealing cover 2-4, air outlet sealing rubber strip 2-5, air outlet door panel 2-6, door panel handle 2-7, door panel hook plate 2-8, door lock 2-9, door reinforcement plate 2-10, spring 4-8-3, and toggle plate 4-8-4;

[0072] Air outlet spring mounting frame 2-1: 2 groups are symmetrically arranged, and are formed by cutting and bending stainless steel plates; a round tube 2-1-1 (the round tube 2-1-1 is cut and formed by a stainless steel seamless steel tube) is welded at the corresponding round hole position on the side, and then a through cylindrical hole is formed; the round tube 2-1-1 is used to install the first spring pin 2-3 of the air outlet; a grille is formed on the surface of the air outlet spring mounting frame 2-1 to prevent large external foreign objects from entering the air outlet channel;

[0073] The air outlet mask plate 2-2 is cut and formed from stainless steel; a grille structure is arranged on it to prevent large foreign objects from entering the air outlet channel;

[0074] The first spring pin 2-3 of the air outlet: It is formed by turning of stainless steel round steel; one end of it is a flat end face, provided with an internal threaded hole, which cooperates with a screw to install the toggle plate 4-8-4; the other end is a tapered step, the spring 4-8-3 is sleeved on the first spring pin 2-3 of the air outlet from the flat end face, and the first spring pin 2-3 of the air outlet is installed in the round tube 2-1-1 of the air outlet spring mounting frame 2-1, and the side surface of the air outlet spring mounting frame 2-1 (the surface of the welded round tube 2-1-1) and the tapered step on the first spring pin 2-3 of the air outlet form a limit for the expansion and contraction of the spring 4-8-3;

[0075] The rubber strip sealing cover 2-4 is cut and bent into shape by a stainless steel plate, and the bent seams on the edges are welded and sealed; and it is installed in the rectangular hole area corresponding to the air outlet door panel 2-6 by rivets; a groove is provided on the back of the rubber strip sealing cover 2-4 for installing the air outlet sealing strip 2-5, and then after assembly, the air outlet sealing strip 2-5 is in contact with the angular end face of the ventilation cover assembly 5-1 to form a certain compression sealing protection structure, which ensures that external water vapor cannot enter the interior of the box body 1, and can only pass through the grille on the air outlet spring mounting frame 2-1 and the air outlet mask plate 2-2, and pass through the ventilation cover assembly 5-1 to enter the radiator tooth plate area of ​​the built-in inverter 5 (this area has an IP65 protection level); the front of the rubber strip sealing cover 2-4 is used to install two air outlet spring mounting frames 2-1 and the air outlet mask plate 2-2.

[0076] Air outlet sealing strip 2-5: It is a purchased flame-retardant foam strip, which has the effects of flame retardancy, compactness, sealing, dustproof and waterproof; it is installed in the inner groove of the strip sealing cover 2-4;

[0077] The air outlet door panel 2-6 is cut and bent from aluminum alloy; its back can form a groove around the edge with the reinforcing plate 2-10, and a sealing strip is inserted into the groove (the structure of the strip is the same as the air outlet sealing strip 2-5, but the length and width are different), and then compressed with the box body 1 to form a sealing protection;

[0078] Door panel handle 2-7: Made of stainless steel, cut, bent and formed, and riveted to the air outlet door panel 2-6; it is mainly used to provide a handshake area and lift, thereby moving the air outlet door panel assembly 2;

[0079] Door panel hook plate 2-8: Made of stainless steel, cut and shaped, and riveted to the air outlet door panel 2-6; can be combined with the hook seat at the upper end of the box body 1 to form a card-type hanging structure, thereby realizing the connection between the air outlet door panel 2-6 and the box body 1;

[0080] Door lock 2-9: A purchased custom lock with IP65 protection and the function of anti-vibration locking of the door panel; when the air outlet door panel 2-6 is connected to the box body 1 through the door panel hook plate 2-8, the door lock 2-9 is rotated to fix the air outlet door panel 2-6 to the box body 1.

[0081] The door reinforcement plate 2-10 is made of aluminum alloy material and is formed by cutting and bending; the frame structure is installed on the back of the air outlet door panel 2-6 by riveting, and forms a groove around the edge with the back of the air outlet door panel 2-6, and a sealing strip is installed in the groove to form a sealing protection channel;

[0082] The assembly process of the air outlet door panel assembly 2 is as follows: first, weld the two sets of air outlet spring mounting frames 2-1-1 and the air outlet housing plate 2-2 to the outer side (front) of the rubber strip sealing cover 2-4, then, still on the same side, pass through the door panel handle 2-7 and the door panel hook plate 2-8 with rivets, and then pass through the air outlet door panel 2-6 and the door reinforcement plate 2-10 in turn and rivet into shape; then install the door lock 2-9; and insert the fitting sealing strip into the groove around the air outlet door panel 2-6 (the shape structure is the same as the air outlet sealing strip 2-5, except that the length and width are different); finally, insert the spring 4-8-3 into the cylindrical section of the first spring pin 2-3 of the air outlet, and then insert it together into the round tube 2-1-1 of the air outlet spring mounting frame 2-1 (2 pieces), press it, and screw it through the toggle plate 4-8-4 into the internal threaded hole of the flat end face of the first spring pin 2-3 of the air outlet.

[0083] The air inlet door panel assembly 3 comprises: an air inlet door panel 3-1, an IP65 type ventilation window (3-4), a door panel handle 2-7, a door panel hook plate 2-8, a door lock 2-9, and a door reinforcement plate 2-10;

[0084] The air inlet door panel 3-1 is cut and bent from aluminum alloy; its back can mainly form a groove around the edge with the reinforcing plate 2-10, into which a sealing strip is inserted (the structure of the strip is the same as the air outlet sealing strip 2-5, but the length and width are different), and then compressed with the box body 1 to form a sealing protection;

[0085] IP65 ventilation window (3-4): It is an externally purchased part. While meeting the ventilation requirements, it also has an IP65 protection level (the internal labyrinth structure can ensure half of the ventilation volume and filter out dust, rainwater and other substances); it is installed on the air inlet door panel 3-1 by screws; the IP65 ventilation window (3-4) is mainly used to filter external air, so that the filtered air enters the interior of the box body 1, and after being sucked in by the fan of the internal module 5, the heat conducted by the radiator fins at the bottom of the internal inverter 5 is blown out, and discharged from the interior of the box body 1 through the ventilation cover assembly 5-1;

[0086] Door panel handle 2-7: Made of stainless steel, cut, bent and riveted to the air inlet door panel 3-1; it is mainly used to provide a handshake area and to lift and move the air inlet door panel assembly 3;

[0087] Door panel hook plate 2-8: Made of stainless steel material, cut and shaped, and riveted to the air inlet door panel 3-1; can be combined with the hook seat at the upper end of the box body 1 to form a snap-on hanging structure, thereby achieving the connection between the air inlet door panel 3-1 and the box body 1.

[0088] Door lock 2-9: A custom lock purchased from outside, which has IP65 protection and the function of earthquake-resistant locking of the door panel; when the air inlet door panel 3-1 is connected to the box body 1 through the door panel hook plate 2-8, the door lock 2-9 is rotated to fix the air inlet door panel 3-1 to the box body 1.

[0089] Door reinforcement plate 2-10: Made of aluminum alloy material, cut and bent into a frame-shaped structure, riveted with the air inlet door panel 3-1, and forming a groove around the edge with the back of the air inlet door panel 3-1. A sealing strip is installed in the groove to form a sealing protection channel;

[0090] The assembly process of the air inlet door panel assembly 3 is as follows: first, the door panel handle 2-7 and the door panel hook plate 2-8 on the same side are rivet-pierced, and then the air inlet door panel 3-1 and the door reinforcement plate 2-10 are successively riveted to form; then the door lock 2-9 is installed; in the groove around the door panel, a fitting sealing strip is installed (the shape and structure are the same as the air outlet sealing strip 2-5, except for the length and width); finally, the IP65 type ventilation window (3-4) is installed on the air inlet door panel 3-1 by bolts;

[0091] Support bracket assembly 4: mainly includes a support bracket 4-1, an insulating slide plate 4-2, a support plate 4-3, a positioning plate 4-6, a support rod assembly 4-7, a rear spring stop assembly 4-8, a side spring stop assembly 4-9, a limit spring plate 4-10, and a limit bracket 4-11;

[0092] The support bracket 4-1 is formed by bending a round steel made of stainless steel, and two straight round steel sections are welded at intervals in the middle area. An internal threaded hole is provided on the exposed end surface of the round steel for mating with screws, so as to install the bracket cover 4-4 in Example 2 onto the support bracket 4-1.

[0093] The insulating slide plate 4-2 is cut and formed from polytetrafluoroethylene (commonly known as Teflon) material, and is drilled to form evenly distributed countersunk holes; the insulating slide plate 4-2 is mounted on the support plate 4-3 by countersunk screws; the insulating slide plate 4-2 is mainly used to reduce the friction with the bottom of the built-in converter 5, thereby having the advantages of reducing friction and saving labor;

[0094] The support plate 4-3 is made of a stainless steel plate by cutting, bending, and setting a rivet nut, and is welded on the support frame 4-1 at the corresponding position; it is mainly used to provide an installation area for the insulating slide plate 4-2, the rear spring stop assembly 4-8, the side spring stop assembly 4-9, the limit spring plate 4-10, and the limit bracket 4-11;

[0095] Positioning plate 4-6: Made of stainless steel material, formed by cutting and bending; inserted into the two round steel bars passing through the middle of the support frame 4-1, and fixed to the two round steel bars by welding at the tail end area, so as to effectively connect the round steel bars into a frame structure, thereby resisting vibration and deformation;

[0096] The support rod assembly 4-7 includes a support rod 4-7-1 and a round tube 1 assembly 4-7-2;

[0097] The support rod 4-7-1 is formed by bending a stainless steel round steel and is turned at the short side of the bend. A rotating step 4-7-1-1 is provided on the support rod 4-7-1, and a fastening outer screw 4-7-1-2 is provided at the end of the rotating step 4-7-1-1; the outer circle of the rotating step 4-7-1-1 is used to cooperate with the small round hole on the mounting plate 4-7-2-1; the fastening outer screw 4-7-1-2 passes through the small round hole on the mounting plate 4-7-2-1 and cooperates with the nut; thereby realizing the connection and rotation of the support rod 4-7-1 and the round tube 1 assembly 4-7-2.

[0098] The round tube 1 component 4-7-2 includes a mounting plate 4-7-2-1 and a round tube 4-7-2-2; the mounting plate 4-7-2-1 is cut from a stainless steel plate, the round tube 4-7-2-2 is cut and formed from a stainless steel seamless steel tube, and the mounting plate 4-7-2-1 and the round tube 4-7-2-2 are assembled by welding; the round tube 4-7-2-2 is sleeved on the round steels on both sides of the support frame 4-1 to achieve relative sliding between the round tube 1 component 4-7-2 and the round steels on both sides of the support frame 4-1; the mounting plate 4-7-2-1 is provided with two round holes, one small round hole cooperates with the outer cylindrical surface of the rotating step 4-7-1-1 on the support rod 4-7-1, and the two realize relative rotation, and the height of the rotating step 4-7-1-1 is 1mm more than the thickness of the mounting plate 4-7-2-1. The other round hole is used to cooperate with the second spring pin 4-8-2 on the side spring stop component 4-9.

[0099] The assembly process of the support rod assembly 4-7 is as follows: pass the round holes of the left and right (symmetrically arranged) mounting plates 4-7-2-1 through the rotating step 4-7-1-1 and then screw on the washers and nuts; the main function of the support rod assembly 4-7 is to wrap and limit the rotating card seat assembly 6 installed on the box body 1; the round tube 4-7-2-2 is sleeved on the round steel on both sides of the support bracket 4-1, and can move forward and backward relative to the round steel;

[0100] The rear spring stop assembly 4-8 includes: a rear end stop bracket 4-8-1, a second spring pin 4-8-2, a spring 4-8-3, a toggle plate 4-8-4, and a round tube bushing 4-8-5; Figure 4 As shown, the rear spring stop assembly 4 - 8 is used to stop the built-in converter 5 .

[0101] The rear end stop bracket 4-8-1 is made of stainless steel material, cut and bent; the second spring pin 4-8-2 is formed by turning stainless steel round steel, one end is set to be conical, and the other end is provided with an internal threaded hole on the flat end; the spring 4-8-3 is a purchased part from the market; the toggle piece 4-8-4 is cut from a stainless steel plate; the round tube bushing 4-8-5 is cut from a stainless steel seamless steel pipe;

[0102] The installation relationship of the various parts in the rear spring stop assembly 4-8 is as follows: first, the round tube bushing 4-8-5 and the rear end stop bracket 4-8-1 are welded to form a through cylindrical hole; then the spring 4-8-3 is inserted into the second spring pin 4-8-2, and then they are inserted into the round tube bushing 4-8-5 together, and the spring is compressed so that the second spring pin 4-8-2 protrudes from the surface of the rear end stop bracket 4-8-1, and then a washer and a screw are passed through the toggle plate 4-8-4, and then matched with the threaded hole of the flat end face of the second spring pin 4-8-2 to achieve fastening; the side of the rear end stop bracket 4-8-1 is fixedly installed with the support plate 4-3.

[0103] The side spring stop assembly 4-9 includes: a mounting plate 4-9-1, a second spring pin 4-8-2, a spring 4-8-3, a round tube bushing 4-8-5, and a toggle rod 4-9-2; wherein the mounting plate 4-9-1 is cut and formed from a stainless steel plate;

[0104] The installation relationship of the parts of the side spring stop assembly 4-9 is as follows: first, weld the round tube bushing 4-8-5 in the round hole of the mounting plate 4-9-1 to form a through cylindrical hole; then insert the spring 4-8-3 into the second spring pin 4-8-2, and then insert them into the round tube bushing 4-8-5 together, compress the spring 4-8-3 so that the second spring pin 4-8-2 protrudes from the surface of the mounting plate 4-9-1, and then use a washer (the outer diameter of the washer is larger than that of the mounting plate 4-9 -1 cylindrical hole diameter, so it can form a stop limit), the screw is fastened with the internal threaded hole of the flat end surface of the second spring pin 4-8-2; the end of the second spring pin 4-8-2 is provided with a toggle rod 4-9-2, and the mounting piece 4-9-1 is fixedly mounted on both sides of the support plate 4-3. When the support rod assembly 4-7 reaches the supporting position, the toggle rod 4-9-2 is used to cooperate with another corresponding circular hole on the mounting piece 4-7-2-1 to limit the support rod assembly 4-7;

[0105] Limiting spring plate 4-10: cut and bent from spring steel plate, welded together with support plate 4-3; when support rod assembly 4-7 reaches the round steel end of support bracket 4-1 (when retracted), limiting spring plate 4-10 works together with the half-notched waist holes of the legs on both sides of support plate 4-3 to limit the support rod assembly 4-7 when retracted to prevent it from displacement and falling off;

[0106] Limit bracket 4-11: It is cut and bent from stainless steel plate and welded to the middle area of ​​one end of the reverse side of the support plate 4-3; it is used when the rear spring stop assembly 4-8 contacts the stop of the internally installed inverter 5, and the paddle piece 4-8-4 in the rear spring stop assembly 4-8 is pulled downward and rotated to fit the surface of the limit bracket 4-11, further compressing the spring 4-8-3, so that the rear spring stop assembly 4-8 forms an effect of compression up and down, and extension and shortening.

[0107] The overall assembly process of the support bracket assembly 4: first, weld the limit spring plate 4-10 and the limit bracket 4-11 to the reverse area of ​​the support plate 4-3; then install the support bracket 4-1 into the two through-holes on the reverse side of the support plate 4-3 and fix them by welding; then insert the positioning plate 4-6 into the two round steel bars passing through the middle of the support bracket 4-1, and fix them by welding at the tail end area; then continue to use the round tube 4-7-2-2 of the support rod assembly 4-7 to pass through the left and right round steel bars on the outside of the support bracket 4-1; then use screws to fix the rear spring stop assembly 4-8 and the two side spring stop assemblies 4-9 to the support plate 4-3 respectively; finally, use countersunk screws to fix the two insulating slide plates 4-2 to the support plate 4-3;

[0108] At this time, the support bracket assembly 4 is an independent tool, that is, it can be used as an auxiliary tool for after-sales personnel. It is usually placed in the office of after-sales personnel. When entering the vehicle depot to repair the converter, it can be brought in (the mass of the support rod assembly 4-7 is about 8kg);

[0109] Internal converter 5: mainly includes: ventilation cover assembly 5-1, converter mounting foot 5-2, module bottom side baffle 5-3, converter box body 5-4, heat sink 5-5, axial flow fan assembly 5-6;

[0110] The ventilation cover assembly 5-1 includes: an air outlet stop plate 5-1-1, a rectangular cover tube 5-1-2, and a sealing cover plate 5-1-3;

[0111] Air outlet stop plate 5-1-1: It is cut and bent into shape by a stainless steel plate; the air outlet stop plate 5-1-1 is fixed on the rectangular cover tube 5-1-2, and it can mainly provide a stopping positioning distance (with the air outlet cover plate 2-2) and a restraining and wrapping limit when inserting with the first spring pin 2-3 of the air outlet: the air outlet stop plate 5-1-1 is provided with an inclined guide plate for guiding the first spring pin 2-3 of the air outlet to cooperate with the hole on the air outlet stop plate 5-1-1.

[0112] Rectangular cover tube 5-1-2: It is formed by splicing four aluminum alloy thick plates, and the four corner gaps are connected by welding; then it is welded with the sealing cover plate 5-1-3 to form a through rectangular tube shape;

[0113] Sealing cover plate 5-1-3: It is cut and formed by thick aluminum alloy plate, one side of which is used to be installed at the air duct opening of the built-in converter 5 to form a seal; the other side is welded with the rectangular cover tube 5-1-2 to form a through channel;

[0114] The inverter mounting foot 5-2 is cut and bent from a stainless steel plate and is provided with inclined surfaces with warped ends and mounting holes; it is used to allow the built-in inverter 5 to be mounted on the inverter fixing frame 7 through the inverter mounting foot 5-2, and the inclined surfaces with warped ends can effectively avoid getting stuck and blocking when contacting the edge of the inverter fixing frame 7 during the sliding and pushing process, thereby preventing the built-in inverter 5 from being blocked and hindering the pushing operation;

[0115] The module bottom side baffle 5-3 is cut from an aluminum plate and riveted to the bottom area of ​​the converter box 5-4 to form a limit with the insulating slide plate 4-2; (such as Fig.50 , two insulating slide plates 4-2 are set at intervals, for example, the distance is 300mm, and the baffle 5-3 is set at the bottom of the converter box 5-4, and the distance between the two baffles 5-3 is 320mm. This design is to prevent the built-in converter 5 from deviating too much from the straight line when it is pushed at the beginning, giving it a guiding and limiting effect).

[0116] Converter box 5-4: Made of aluminum alloy material, mainly realized by welding, riveting and other processes; it can provide an installation environment for major electrical components;

[0117] Radiator 5-5: It is mainly made of 6 series extruded aluminum alloy purchased from outside. It mainly provides installation for power devices that generate heat and conducts heat to the fins. The fins are arranged one by one at intervals, and the gaps in the middle allow wind to pass through. The fan is used to blow towards the fins, taking away the heat and discharging it from the inside of the box 1.

[0118] Axial flow fan assembly 5-6: It is an externally purchased axial flow fan, which is installed through a steel mounting frame and can blow toward the fins of the radiator 5-5 to take away the heat;

[0119] The rotating card seat assembly 6 includes a flip card plate 6-1, a flip card seat 6-2, a rotating shaft bracket 6-3, a rotating shaft 6-4, and a nut 6-5;

[0120] Flip card plate 6-1: It is cut and bent from stainless steel plate; its main function is to prevent the support rod assembly 4-7 from falling off from the half-notch waist groove hole of the flip card seat 6-2, and it can form a mutual wrapping and limiting effect with the flip card seat 6-2, thereby ensuring the reliability and safety of the support rod assembly 4-7 during the force-bearing process.

[0121] The flip card seat 6-2 is cut and bent from a stainless steel plate; the flip card seat 6-2 is fixedly mounted on the bottom of the box 1; its main functions are: to provide a half-notch waist slot hole for wrapping and limiting the support rod assembly 4-7, and to withstand the pressure transmitted by the support rod assembly 4-7, and to form a mutual wrapping with the flip card plate 6-1, so as to form reliability and safety in the operation process;

[0122] The shaft bracket 6-3 is cut and bent from a stainless steel plate; it is welded symmetrically on the flip holder 6-2; its main function is to provide a position for the shaft 6-4 to be installed and rotated;

[0123] The rotating shaft 6-4 is formed by turning a stainless steel round steel, with an outer threaded rod at the outermost end, followed by a cylindrical section; it is mainly used to flip the clamping plate 6-1, providing binding and rotation functions;

[0124] The installation relationship of the various parts of the rotating card seat assembly 6 is as follows: first, the rotating shaft bracket 6-3 is symmetrically welded to the flip card seat 6-2, and then the rotating shaft 6-4 (symmetrically installed at two places on the left and right) passes through the circular holes of the two arms of the flip card plate 6-1. The flip card plate 6-1 and the rotating shaft bracket 6-3 are interference fit, so that the flip card plate 6-1 is rotatably connected with the rotating shaft 6-4 and has damping, and will not fall off automatically; the rotating shaft 6-4 then passes through the circular hole of the rotating shaft bracket 6-3, and is fastened with a nut 6-5 and a washer; at this point, the flip card plate 6-1 can rotate along the cylindrical section of the rotating shaft 6-4 and is restricted and wrapped in the flip card seat 6-2;

[0125] The converter fixing frame 7 is formed by cutting and bending a stainless steel plate. The converter fixing frame 7 is provided with two threaded holes 7-1 for fixing the built-in converter 5. The threaded holes 7-1 are aligned with the converter mounting feet 5-2 and fixed by screws. The converter fixing frame 7 is also provided with an upper flange 7-2 for pushing the built-in converter 5 into position, which mainly enables the built-in converter 5 to slide, position and install.

[0126] The round tube fixing frame assembly 8 (left-right symmetrical parts): comprises a notched round tube 8-2 and a fixing frame 8-1;

[0127] Fixed frame 8-1: It is cut and bent from a stainless steel plate and is provided with a half-waist slot hole running through the length direction, which is used to provide a positioning and welding position for the notched round tube 8-2;

[0128] The notched round tube 8-2 is formed by milling and pinning a stainless steel seamless steel tube; the notched round tube 8-2 includes a cylindrical part and a notched part, wherein a quarter of the notched part is milled off, and three quarters of the shape is retained; it can not only satisfy the support frame 4-1, which is effectively wrapped and bound in the notched round tube 8-2, but also enable the notched round tube 8-2 to slide back and forth and telescope;

[0129] The assembly process of the round tube fixing frame assembly 8 is as follows: the notched round tube 8-2 is placed in the half-waist slot of the fixing frame 8-1, wherein the angular plane of the notch is flush with the upper surface of the fixing frame 8-1, so that rapid positioning and angle control (the two are flush) can be achieved, and then the two are combined together by welding;

[0130] The bottom side baffle 10 is cut from a stainless steel plate, with a long single-side edge pressed to a dead edge, and one end is bent outward at a small angle; two sets are provided, symmetrically installed on the inner side of the round tube fixing frame assembly 8, so that the outward-turned surface of one end is facing inward, forming a single-sided large opening state; it can form a left-right wrapping restriction during the push-in process of the built-in converter 5, so that the built-in converter 5 can be basically controlled within a certain range, which is convenient for positioning and fastening;

[0131] Embodiment 2:

[0132] The present invention discloses a rail transit vehicle undercarriage converter installation structure, which is different from the first embodiment in that:

[0133] At this time, the support bracket assembly 4 is placed inside the box body 1 for a long time;

[0134] The air inlet door panel assembly 3 also includes a stop frame 3-2 and a flat rubber strip 3-3;

[0135] The stop frame 3-2 is formed by cutting and bending stainless steel; a U-shaped groove is provided on the stop frame 3-2 for pasting the flat rubber strip 3-3;

[0136] Flat-type rubber strip 3-3: It is a purchased flame-retardant foam rubber strip, which has flame-retardant and extrusion-dense properties; the flat-type rubber strip 3-3 fits in the U-shaped groove of the stop frame 3-2; it is mainly used to limit the bracket cover 4-4 of the supporting bracket assembly 4 to prevent it from displacement and shaking.

[0137] The stop frame 3-2 is fixedly connected to the door reinforcement plate 2-10 and the air inlet door plate 3-1; a flat rubber strip 3-3 is pasted in the U-shaped groove of the stop frame 3-2.

[0138] The support bracket assembly 4 also includes: a bracket sealing plate 4-4, a bracket positioning pin 4-5,;

[0139] Bracket cover plate 4-4: It is made of stainless steel material by cutting, bending, and setting rivet nuts. It is installed on the end face of the support bracket 4-1 with threaded holes by screws, and forms a frame structure after tightening; threaded holes are provided on the bracket cover plate 4-4 for installing bracket positioning pins 4-5; through holes are provided on the bracket cover plate 4-4 for connecting with the two round steels in the middle of the support bracket 4-1 by screws; a round tube notch avoidance portion 4-4-1 is also provided on the bracket cover plate 4-4, and a through hole is provided on the round tube notch avoidance portion 4-4-1. When connected with the support bracket 4-1, the screw passes through the through hole and cooperates with the threaded holes at the two outermost round steel ends of the support bracket 4-1; the shape of the round tube notch avoidance portion 4-4-1 cooperates with the inner hole of the notch-type round tube 8-2, and can slide freely in the notch-type round tube 8-2;

[0140] Bracket locating pin 4-5: It is formed by turning stainless steel round steel, and one end of it is tapered. When the supporting bracket assembly 4 is fully pushed into the interior of the box, the bracket locating pin 4-5 is inserted into the countersunk hole of the locating pin contact plate 9, thereby achieving wrapped limiting. The external threaded rod at the other end can be screwed into the threaded hole of the bracket cover plate 4-4.

[0141] The converter installation structure also includes: a positioning pin contact plate 9: made of an aluminum alloy plate through cutting, bending, countersunk drilling and other processes; arranged on one side of the bottom of the box body 1, the positioning pin contact plate 9 is provided with a through hole, which cooperates with the bracket positioning pin 4-5, and can play the role of wrapping and binding the bracket positioning pin 4-5; together with the flat rubber strip 3-3, it prevents the vibration of the entire support bracket assembly 4;

[0142] At this time, the support bracket assembly 4 is placed inside the box 1 for a long time. Note that when the support rod assembly 4-7 is placed inside the box 1 for a long time (equivalent to one set for each box, rather than as a separate maintenance tool), two additional parts are required; that is, the bracket cover plate 4-4 is screwed into the inner threaded end of the support bracket 4-1 through screws; and then the two bracket locating pins 4-5 are screwed into the threads of the bracket cover plate 4-4.

[0143] Example 3

[0144] The present invention discloses a rail transit vehicle undercarriage converter installation structure, which is different from the embodiment 2 in that: at this time, the support bracket assembly 4 is permanently placed inside the box body 1, and the support bracket assembly 4 does not include two side spring stopper assemblies 4-9;

[0145] When supporting the converter, the support rod assembly 4 - 7 is limited by the bracket cover plate 4 - 4 , the unmissing tube portion on the notched circular tube 8 - 2 , and the rotating clamping seat assembly 6 .

[0146] Example 4

[0147] The present invention discloses a method for installing a mounting structure of a converter under a rail transit vehicle: for the mounting method of the structure in Example 1:

[0148] The specific steps are as follows:

[0149] Step 1, riveting the converter fixing frame 7, the round tube fixing frame assembly 8 (left-right symmetrical parts), the positioning pin contact plate 9, and the bottom side baffle 10 (left-right symmetrical parts) to the bottom area of ​​the box body 1;

[0150] Step 2: Fasten the rotating card seat assembly 6 to the bottom front area of ​​the box body 1 by means of a combination bolt;

[0151] Step 3: Install the axial fan assembly 5-6 on the converter box body 5-4 by bolts, so that the wind can blow toward the radiator fins and take away the heat; install the ventilation cover assembly 5-1 on the converter box body 5-4 by bolts, so that the heat can pass through the channel and escape from the box body 1;

[0152] Step 4: first fold up the support frame assembly 4. The folding process mainly includes:

[0153] The support rod assembly 4-7 is rotated toward the support plate 4-3 until it fits on the corner edge of the support plate 4-3, and then the support rod assembly 4-7 is pulled toward the end close to the limiting bracket 4-11, and the middle rod of the support rod 4-7-1 gradually approaches the half-notch of the support plate 4-3, and when the middle rod of the support rod 4-7-1 of the support rod assembly 4-7 slides and contacts the limiting spring plate 4-10, it is continued to be pulled to the bottom, and the wavy groove of the limiting spring plate 4-10 elastically suppresses the middle rod of the support rod 4-7-1; the limiting of the support rod assembly 4-7 is now completed, and it can be kept from falling off even in a shaking state; (this folding method is suitable for storage or carrying as an independent tooling; it is also suitable for placing the device inside the box 1 for a long time);

[0154] Step 5, first rotate the flip card plate 6-1 in the rotating card seat assembly 6 upward (the flip card plate 6-1 and the rotating shaft bracket 6-3 are interference fit, with a certain damping, and then can be flipped upward without automatically falling);

[0155] Step 6, push the support rod assembly 4-7 in the direction away from the limit bracket 4-11, and when it is pushed to the side spring stop assembly 4-9, operate the toggle rod 4-9-2 to make it engage with the round hole on the upper end of the installation piece 4-7-2-1, and the support rod assembly 4-7 is limited at this time, and it cannot be pushed further; the front and rear distance of the support rod assembly 4-7 is locked at the installation position of the side spring stop assembly 4-9; then the support rod assembly 4-7 cannot move forward and backward, and the only operation is to rotate the support rod 4-7-1 up and down;

[0156] Step 7, insert the outer round steel of the support frame 4-1 of the support frame assembly 4 into the round tube fixing frame assembly 8. In the process of inserting it in advance, you can insert more points first, and then insert the middle rod of the support rod 4-7-1 of the support rod assembly 4-7 into the waist groove notch of the flip card seat 6-2, and then turn the flip card plate 6-1 downward, so that the middle rod of the support rod 4-7 support rod 4-7-1 of the support rod assembly 4-7 can be wrapped and limited front and back; at the same time, combined with the insertion and locking of the side spring stopper assembly 4-9 and the support rod assembly 4-7 in the previous step, the support frame assembly 4 is finally made at this time, whether it is pulled back (through the waist groove hole of the flip card plate 6-1 to limit its falling off) or pushed into the inner side of the box body 1 (through the waist groove hole of the flip card seat 6-2 to limit its movement);

[0157] Step 8: First, press down and rotate the toggle piece 4-8-4 set in the rear spring stop assembly 4-8 on the support bracket assembly 4 to make it fit on the limit bracket 4-11, and then have two people lift the internal converter 5, roughly centered on the left and right (the left and right spacing of the insulating slide plate 4-2 of the support bracket is smaller than the spacing of the side block strip 5-3 at the bottom of the module, see the attached Fig.50 ), place it on the upper end of the support frame assembly 4 (the bottom of the converter contacts the insulating slide plate 4-2), and then push the built-in converter 5 into the box body 1; when the raised edge of the converter mounting foot 5-2 contacts the converter fixing frame 7, the angle of the raised edge can effectively improve the passability during contact and overlap, and at the same time, the symmetrically arranged large-opening bottom side baffles 10 can gradually limit the built-in converter 5 to the left and right during the pushing process (the distance between the converter mounting feet 5-2 is greater than the distance between the two symmetrical bottom side baffles 10 by 3mm, see attached Fig.41 ); Then the built-in converter 5 can be easily slid and pushed in;

[0158] Step 9, when the built-in converter 5 is pushed to the bottom, it is stopped by the upper flange 7-2. At this time, it is only necessary to slightly adjust the built-in converter 5 to the left and right (because the insulating slide plate 4-2 is made of polytetrafluoroethylene, its surface is smooth and the friction resistance is very small, it is easy to push and rotate the built-in converter 5 weighing tens of kilograms), so that the waist hole of the converter mounting foot 5-2 can be aligned with the threaded hole 7-1, and then fastened by 4 combination bolts;

[0159] Step 10: At this time, the flip card plate 6-1 is turned upward and then the support bracket assembly 4 is pulled out (this form is an operation as an independent tool, which is not kept inside the box body 1 but taken away);

[0160] Step 11, hang up the air outlet door panel assembly 2, and then push it inward (a 1mm gap is reserved between the rubber strip sealing cover 2-4 and the air outlet stop plate 5-1-1. When the door panel is continuously pushed inward, it will be stopped by the air outlet stop plate 5-1-1 at a certain distance, which can form an effective stop positioning, see the attached Fig.40 ); When the first spring pin 2-3 of the air outlet contacts the inclined area of ​​the air outlet stop plate 5-1-1, the spring 4-8-3 begins to be compressed, and then shrinks and slides, and when it reaches the circular hole area of ​​the air outlet stop plate 5-1-1, it is bounced in and locked; at the same time, the edge of the ventilator hood assembly 5-1 presses into the air outlet sealing strip 2-5 to form a seal around the cylinder, with the effect of penetrating the middle;

[0161] The structural features here (tolerance design - step 11) are as follows:

[0162] Any box body will produce deformation and changes within a certain tolerance range as long as it is welded. In this case, tolerance is required to offset some of the deformation and other tolerance problems as much as possible. The partial structure described in step 11 can offset some of the dimensional deviations. For example, the edges of the ventilation hood assembly 5-1 described in this structure are pressed into the air outlet sealing strip 2-5 to form a seal around the cylinder. From the perspective of the theoretical compression setting, it is generally pressed in by about 30% (for example, if the thickness of the sealing strip is 10mm, it is most appropriate to control the amount of compression to 3-4mm. Too little compression can easily lead to poor sealing in some corner areas, while too much compression can cause the resilience of the sealing strip to decrease, and then it cannot maintain the wrapping for a long time, which leads to a decrease in sealing). It is necessary to ensure a compression of 30%. The common practice is to use bolts to fix the connection for sealing compression in this area. The sealing effect can be satisfactory, but the disassembly process is extremely time-consuming.

[0163] The structure of this patent: first, a quick spring pin is used for inserting and locking; second, the door panel is made of aluminum alloy (aluminum alloy, the rigidity of the large plane is lower than that of the steel plate), which can push the middle area of ​​the door panel (strip sealing cover 2-4) to produce a small concave or convex, and then the whole is driven, and the first spring pin 2-3 of the air outlet is also adjusted for the concave and convex distance; third, a 1mm gap is reserved between the strip sealing cover 2-4 and the air outlet stop plate 5-1-1. When the door panel is continuously pushed inward, it is stopped by the air outlet stop plate 5-1-1 at a certain distance (that is, the distance of about 30% of the set compression amount), which can form an effective stop positioning; based on the above structural design, it can correct the problem of insufficient or excessive front and rear dimensions when the built-in inverter 5 is installed inside the box body 1; this structure realizes rapid installation locking and a gap coordination of always maintaining a compression amount of 30%;

[0164] Step 12, similarly hang up the air inlet door panel assembly 3, push it in and fasten it with the door lock 2-9, and the installation of the entire undercarriage inverter equipment is completed; when the undercarriage inverter is hoisted on the beam at the lower end of the subway car, the equipment is equivalent to being suspended on the upper end of the rail, and the external air first passes through the IP65 ventilation window (3-4), filters out water or dust particles, and then the clean air enters the interior of the box body 1; then the axial flow fan assembly 5-6 inhales this part of the air and blows it toward the fins of the radiator 5-5, taking away the heat generated by the power device through the gaps between the fins; finally, it is discharged to the outside of the box body 1 through the rectangular cover tube 5-1-2 and the air outlet door panel assembly 2 in turn;

[0165] Example 5

[0166] A method for installing a mounting structure of a converter under a rail transit vehicle, the difference between the installation method of the structure in Example 2 and Example 4 is that the stop frame 3-2 and the flat rubber strip 3-3 provided in the air inlet door panel assembly 3 are used to meet the needs of the support frame assembly 4 being stored in the box body 1 for a long time; the installation and opening process of the storage state of the support frame assembly 4 is described below:

[0167] Step 7 is:

[0168] Step 7.1: Storage state of the support bracket assembly 4: insert the outer round steel of the support bracket 4-1 of the folded support bracket assembly 4 into the round tube fixing frame assembly 8, and insert it inward for a distance, beyond the round tube without a gap, and then screw the bracket cover plate 4-4 into the threaded hole at the end of the support bracket 4-1 through screws; then screw the two bracket positioning pins 4-5 into the threads of the bracket cover plate 4-4, and the support bracket assembly 4 has achieved a structural form that cannot be separated from the box body 1 (this structural form stored in the box body 1 can cancel the two side spring stop assemblies 4-9);

[0169] Step 7.2: Pull it out to the bottom, release the support rod assembly 4-7 to extend it into the waist groove notch of the flip card seat 6-2, and then turn the flip card plate 6-1 downward (this part of the operation is basically the same as step 7);

[0170] In step 10: when storing the support bracket assembly 4, first put away the support rod assembly 4-7 (see step 4 in embodiment 4), and then push it to the bottom inside the box body 1. When the front end of the bracket positioning pin 4-5 is tapered, it can better contact the countersunk hole of the positioning pin contact plate 9 during the pushing process, and then slide self-correction and extend into the countersunk hole, thereby realizing the wrapped limit; through the blocking of the stop frame 3-2 and the flat rubber strip 3-3 set with the air inlet door panel assembly 3, long-term storage of the support bracket assembly 4 is formed (basic principle: the front end is supported to prevent vibration and displacement, and the rear end flat rubber strip 3-3 stops its displacement through elastic compression);

[0171] Special note: The three-quarter shape of the notched circular tube 8-2 can just wrap and restrain the support bracket 4-1, while also allowing it to slide forward and backward; similarly, the circular tube notch avoidance parts 4-4-1 on both sides of the bracket cover 4-4 can freely move forward and backward in the circular tube with the three-quarter notch left; the circular tube structure with the three-quarter notch is designed to prevent the support bracket 4-1 from shaking, rubbing, and resonating when the vibration generated during the operation of subway and other rail trains during long-term storage of the support bracket 4-1;

[0172] Example 6

[0173] The present invention discloses a method for using a mounting structure of a converter under a rail transit vehicle during converter fuse maintenance. For the mounting structure in Example 2, the specific process is as follows:

[0174] First, open the air inlet door panel assembly 3 (turn the door lock 90°, then pull it outward at a certain angle and move it upward a certain distance to remove the door panel from the hook seat of the box body 1);

[0175] Then pull the support bracket assembly 4 to the bottom (when pulled in to the bottom, the bracket cover plate 4-4 will be stopped by the round steel that has not been cut by a quarter), and then refer to steps 6 and 7 (when used in the form of long-term storage, the side spring stop assembly 4-9 can be cancelled), and connect the support rod assembly 4-7 with the rotating card seat assembly 6 to form an oblique triangle support; then press the toggle plate 4-8-4 and rotate it to disengage from the limit bracket 64-11, and then the second spring pin 4-8-2 pops up and exceeds the height of the insulating slide plate 4-2; secondly, turn the door lock to release the air outlet door panel assembly 2, and then use both hands to operate left and right at the same time, pull the toggle plate 4-8-4 inward, so that the first spring pin 2-3 of the air outlet is disengaged from the middle round hole of the air outlet stop plate 5-1-1, and then remove the entire air outlet door panel assembly 2

[0176] Finally, loosen the four fastening bolts on the inverter mounting foot 5-2, pull the built-in inverter 5 toward the supporting bracket assembly 4, and when it reaches the edge, it is stopped by the second spring pin 4-8-2, forming a limit, which ensures the safety of the operation. Then two people can lift the built-in inverter 5 out; the overall disassembly of the built-in inverter 5 is completed. The whole process is simple to operate, safe and reliable, requires fewer bolts to be disassembled, and has greatly improved efficiency.

[0177] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A converter installation structure for a rail transit vehicle, characterized in that: The invention comprises a box body (1), an air outlet door panel assembly (2), an air inlet door panel assembly (3), a support frame assembly (4), a built-in inverter (5), a rotating card seat assembly (6), an inverter fixing frame (7), a round tube fixing frame assembly (8), and a bottom side baffle (10); the air outlet door panel assembly (2) and the air inlet door panel assembly (3) are installed on the box body, the support frame assembly (4) is used to support the built-in inverter (5) during maintenance or assembly, the rotating card seat assembly (6) is fixed on the box body, and the rotating card seat assembly (8) is fixed on the box body. The seat assembly (6) is used to support and limit the support rod assembly (4-7) on the support frame assembly (4); the inverter fixing frame (7) is used to install the inverter (5); the fixed round tube fixing frame assembly (8) is used to cooperate with the support frame assembly (4) to transport the built-in inverter (5) into the box or pull the built-in inverter (5) out of the box; the bottom side baffle (10) is symmetrically installed on the inner side of the round tube fixing frame assembly (8) and is used to guide and limit the position of the built-in inverter (5) during installation.

2. The inverter installation structure under the rail transit vehicle according to claim 1 is characterized in that: The air outlet door panel assembly (2) comprises an air outlet spring mounting frame (2-1), an air outlet housing plate (2-2), an air outlet first spring pin (2-3), a rubber strip sealing cover (2-4), an air outlet sealing rubber strip, an air outlet door panel (2-6), a door panel handle (2-7), a door panel hook plate (2-8), a door lock (2-9), a door reinforcement plate (2-10), a spring (4-8-3), and a toggle plate (4-8-4); the air outlet spring mounting frame (2-1) and the air outlet housing plate (2-2) are fixedly mounted on the rubber strip sealing cover (2-4); the air outlet first spring pin (2-3) is equipped with a spring (4-8-3) and slides through the side of the air outlet spring mounting frame (2-1) and is fixedly connected to the toggle plate (4-8-4); the rubber strip The sealing cover (2-4) is fixedly connected to the air outlet door panel (2-6), and the air outlet sealing rubber strip is installed in a groove on the rubber strip sealing cover (2-4); the air outlet door panel (2-6) is fixedly connected to the box body, and the door panel handle (2-7) is fixed to the air outlet door panel (2-6); the door panel hook plate (2-8) is fixed above the air outlet door panel (2-6) and cooperates with the hook at the upper end of the box body (1) to achieve the connection between the air outlet door panel (2-6) and the box body (1); the door lock (2-9) is installed on the air outlet door panel (2-6) to achieve the fixation of the air outlet door panel (2-6) and the box body (1); the door reinforcement plate (2-10) is fixed to the back of the air outlet door panel (2-6) and a sealing rubber strip is arranged between the door reinforcement plate (2-10) and the air outlet door panel (2-6).

3. According to the installation structure of the inverter under the rail transit vehicle according to claim 1, it is characterized in that: The air inlet door panel assembly (3) comprises: an air inlet door panel (3-1), an IP65 type ventilation window (3-4), a door panel handle (2-7), a door panel hook plate (2-8), a door lock (2-9), and a door reinforcement plate (2-10); the IP65 type ventilation window (3-4), the door panel handle (2-7), the door panel hook plate (2-8), and the door lock (2-9) are fixedly mounted on the air inlet door panel (3-1), and the door reinforcement plate (2-10) is mounted on the back side of the air inlet door panel (3-1) and a sealing strip is arranged between the door reinforcement plate (2-10) and the air inlet door panel (3-1).

4. According to the installation structure of the inverter under the rail transit vehicle according to claim 1, it is characterized in that: The support frame assembly (4) comprises a support frame (4-1), an insulating slide plate (4-2), a support plate (4-3), a positioning plate (4-6), a support rod assembly (4-7), a rear spring stop assembly (4-8), a limit spring plate (4-10), and a limit bracket (4-11); the support plate (4-3) and the positioning plate (4-6) are fixedly mounted on the support frame (4-1), the insulating slide plate (4-2) is fixedly mounted on the support plate (4-3), the rear spring stop assembly (4-8), the limit spring plate (4-10), and the limit bracket (4-11) are fixedly mounted on the support plate (4-3), and the support rod assembly (4-7) is slidably mounted relative to the support frame (4-1); the rear spring stop assembly (4-8) is used to stop the internal inverter (5) and cooperates with the limit bracket (4-11) when not stopping; The support rod assembly (4-7) comprises: the support rod assembly (4-7) comprises a support rod (4-7-1) and a round tube 1 assembly (4-7-2); The end of the support rod (4-7-1) is rotatably mounted on the round tube 1 assembly (4-7-2), and the round tube 1 assembly (4-7-2) is slidably mounted on the round steel of the support bracket (4-1). The limiting spring plate (4-10) is used to limit the support rod (4-7-1) when it is folded.

5. According to the installation structure of the inverter under the rail transit vehicle according to claim 4, it is characterized in that: The support bracket assembly (4) further comprises a side spring stop assembly (4-9), which is fixedly mounted on both sides of the support plate (4-3). When the support rod assembly (4-7) plays a supporting role, the toggle rod (4-9-2) in the side spring stop assembly (4-9) is used to cooperate with the hole on the round tube 1 assembly (4-7-2), so that the support rod assembly (4-7) does not slide relative to the support bracket (4-1).

6. According to the installation structure of the inverter under the rail transit vehicle according to claim 4, it is characterized in that: The support frame assembly (4) also includes a support cover plate (4-4) and a support positioning pin (4-5), and the air inlet door panel assembly (3) also includes a stop frame (3-2) and a flat rubber strip (3-3); the inverter installation structure also includes a positioning pin contact plate (9); the support frame cover plate (4-4) is fixedly installed with the support frame (4-1), and the support frame cover plate (4-4) is provided with a support positioning pin (4-5); the positioning pin contact plate (9) is on one side of the bottom of the box body (1), and the positioning pin contact plate (9) is provided with a through hole, which cooperates with the support positioning pin (4-5); the stop frame (3-2) is installed on the air inlet door panel assembly (3), and the stop frame (3-2) is provided with a flat rubber strip (3-3) for limiting and buffering the support frame cover plate (4-4) of the support frame assembly (4).

7. According to the installation structure of the inverter under the rail transit vehicle according to claim 4, it is characterized in that: The rotating card seat assembly (6) comprises a flip card plate (6-1), a flip card seat (6-2), and a rotating shaft bracket (6-3); the flip card plate (6-1) is fixed on the box body, the rotating shaft bracket (6-3) is fixedly connected to the flip card plate (6-1), and the rotating shaft bracket (6-3) is rotatably mounted on the flip card seat (6-2).

8. According to the installation structure of the inverter under the rail transit vehicle according to claim 4, it is characterized in that: The round tube fixing frame assembly (8) comprises a notch-shaped round tube (8-2) and a fixing frame (8-1); the fixing frame (8-1) is fixedly mounted on a box body, the notch-shaped round tube (8-2) and the fixing frame (8-1) are fixedly mounted, and the round steel of the support rod assembly (4-7) slides in the notch-shaped round tube (8-2); the notch-shaped round tube (8-2) comprises a cylindrical part and a notch part, and a quarter of the notch part is milled off, leaving three quarters.

9. A method for installing a mounting structure of a converter under a rail transit vehicle, characterized in that: The specific steps are: Step 1: Rivet the converter fixing frame (7), the round tube fixing frame assembly (8), the positioning pin contact plate (9), and the bottom side baffle (10) to the bottom area of ​​the box (1); fasten the rotating base assembly (6) to the bottom front area of ​​the box (1); assemble the built-in converter (5); Step 2, rotate the support rod assembly (4-7) toward the support plate (4-3) until it fits on the corner edge of the support plate (4-3), and then pull the support rod assembly (4-7) toward the end close to the limit bracket (4-11), so that the middle rod of the support rod (4-7-1) gradually approaches the half-notch of the support plate (4-3), and when the middle rod of the support rod assembly (4-7) (4-7-1) slides and contacts the limit spring plate (4-10), continue to pull it to the bottom, and the wave-shaped groove of the limit spring plate (4-10) elastically suppresses the middle rod of the support rod (4-7-1); Step 3, first rotate the flip card plate (6-1) in the rotating card seat assembly (6) upward and flip it; push the support rod assembly (4-7) in the direction away from the limit bracket (4-11), and when it is pushed to the side spring stop assembly (4-9), the toggle rod (4-9-2) cooperates with the circular hole at the upper end of the installation piece (4-7-2-1) to limit the support rod assembly (4)-7, and it cannot be pushed further; at this point, the front and rear distance of the support rod assembly (4-7) is locked at the installation position of the side spring stop assembly (4-9); at this time, the support rod assembly (4-7) cannot move forward and backward, and can only perform the operation of rotating the support rod (4-7-1) up and down; Step 4: Insert the outer round steel of the support frame (4-1) of the support frame assembly (4) into the round tube fixing frame assembly (8), insert the middle rod of the support rod (4-7-1) of the support rod assembly (4-7) into the waist groove notch of the flip card seat (6-2), and then rotate the flip card plate (6-1) downward, so that the middle rod of the support rod assembly (4-7) and the support rod (4-7-1) can be wrapped and limited forward and backward; at the same time, combined with the insertion and locking of the side spring stop assembly (4-9) and the support rod assembly (4-7) in the previous step, the support frame assembly (4) is finally limited; Step 5, first press down and rotate the toggle piece (4-8-4) provided on the support frame assembly (4) to make it fit on the limit bracket (4-11), then two persons lift the built-in converter (5) and place it on the upper end of the support frame assembly (4), and then push the built-in converter (5) into the box body (1); with the help of the converter fixing frame (7) and the bottom side baffle (10), the built-in converter (5) is pushed in and installed; Step 6, turning the flip card plate (6-1) upwards and then pulling out the support frame assembly (4); Step 7, hang up the air outlet door panel assembly (2), and then push it inward. When the first spring pin (2-3) of the air outlet contacts the inclined area of ​​the air outlet stop plate (5-1-1), the spring (4-8-3) begins to be compressed, and then shrinks and slides, and when it reaches the circular hole area of ​​the air outlet stop plate (5-1-1), it is bounced in and locked; at the same time, the edge of the ventilation cover assembly (5-1) presses into the air outlet sealing strip (2-5) to form a seal around the cylinder, with the effect of penetrating the middle; Step 8: Similarly hang up the air inlet door panel assembly (3), push it in and fasten it with the door lock (2-9), and the installation of the entire undercar inverter equipment is completed.

10. The method for installing the installation structure of the inverter under the rail transit vehicle according to claim 9, characterized in that: In step 3, when the support frame assembly (4) is in the storage state: the outer round steel of the support frame (4-1) of the folded support frame assembly (4) is inserted into the round tube fixing frame assembly (8), extending beyond the round tube without a gap, and then the bracket sealing plate (4-4) is fixedly connected to the end of the support frame (4-1); then two bracket positioning pins (4-5) are installed on the bracket sealing plate (4-4), and the support frame assembly (4) has thus achieved a structural form that cannot be separated from the box body (1); In step 6: when storing the support frame assembly (4), first fold up the support rod assembly (4-7), and then push it into the box body (1) to the bottom, when the bracket positioning pin (4-5) cooperates with the positioning pin contact plate (9); through the blocking of the stop frame (3-2) and the flat rubber strip (3-3) set with the air inlet door panel assembly (3), long-term storage of the support frame assembly (4) is formed.

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