A fixed module for the welding of the car body undercarriage

Abstract

The invention discloses a kind of for car body underframe welding's pull pillow fixed module, it includes car coupler positioning module, traction beam positioning module, pillow beam positioning module and crossbeam support module;The invention will be integrated in a module with the positioning function of car coupler, traction beam, pillow beam, through unified installation datum and adjustable relative position relationship, ensure the size accuracy and mutual position relationship between each key component, avoid cumulative error.In addition, modular design is adopted, overall hoisting or through T-shaped groove is quickly installed on main frame, each clamping component is simple to operate, without complex adjustment and measurement, greatly improve the assembly and welding efficiency.Moreover, the position of each positioning component is adjustable, the support height is adjustable, the installation position of the whole module on main frame is adjustable, so that it can adapt to the end underframe structure of different vehicle models, realize quick switching production.

Description

Technical Field

[0001] This invention belongs to the field of welding technology for the chassis frame of rail vehicles, and specifically relates to a traction pillow fixing module for welding chassis frames. Background Technology

[0002] The car body is the core load-bearing component of a rail vehicle, and its manufacturing precision directly affects the vehicle's operational safety, stability, and service life. The underframe, as the basic framework of the car body, is typically welded together from components such as side beams, crossbeams, and end beams. The positioning accuracy of the end underframes is crucial to ensuring the overall dimensions of the car body and the smooth progress of subsequent final assembly.

[0003] In existing technologies, a dedicated integral positioning mold is designed for specific train models, and all components of the end frame are placed into the mold for positioning and welding at once. While this method offers relatively high precision, it cannot adapt to the diverse, small-batch production characteristics of rail vehicles. With the rapid development of urban rail transit, the models of subway and intercity EMU trains are becoming increasingly numerous, with varying structural dimensions. For manufacturing enterprises, designing and manufacturing a separate set of dedicated welding fixtures for each train model, or making time-consuming and labor-intensive modifications to existing fixtures when switching models, has become a major cause of increased manufacturing costs, time costs, and resource waste. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a traction beam and bolster beam fixing module for welding vehicle body chassis. This module can achieve precise and reliable positioning and coordinated fixing of components such as traction beams and bolster beams, effectively controlling welding deformation.

[0005] The present invention is achieved through the following technical solution: a traction bolster fixing module for welding the chassis frame of a vehicle, which includes a coupler positioning module, a traction beam positioning module, a bolster beam positioning module and a crossbeam support module; The coupler positioning module includes a second crossbeam fixedly installed on the main frame of the welding device. A coupler positioning seat is fixedly installed in the middle of the second crossbeam. The coupler positioning seat is provided with a positioning pin corresponding to the coupler mounting hole. Bolt seats for supporting the end base frame are provided on both sides of the coupler positioning seat. The traction beam positioning module includes a crossbeam three fixedly installed on the main frame. Two longitudinal beams extend from the middle of the crossbeam three. Support seats for supporting the traction beam are provided on the upper surfaces of the two longitudinal beams. Push bolts for pressing against both sides of the traction beam are arranged horizontally and symmetrically on the two longitudinal beams. The bolster beam positioning module includes a fourth crossbeam fixedly installed on the main frame. The fourth crossbeam is provided with a support for supporting the bolster beam. Positioning bolts for clamping the bolster beam are symmetrically arranged on the third crossbeam and the fourth crossbeam. The third crossbeam is also fixedly installed with a bolster beam positioning block for defining the position of the bolster beam. The bolster beam positioning block is in contact with the side end of the bolster beam. The crossbeam support module includes support rods disposed between the crossbeams and adjustment rods disposed between the crossbeams and the side beams, which are used to ensure the overall assembly width dimension of the base frame.

[0006] Furthermore, both the support rod and the adjusting rod are screw-type adjustable support rods.

[0007] Furthermore, the position of the bolster positioning block can be adjusted along the length of the crossbeam three.

[0008] Furthermore, the coupler positioning seat is detachably mounted on the second crossbeam.

[0009] Furthermore, the surface of the main frame is provided with T-slots and bolt mounting notches for the installation of the second, third and fourth crossbeams.

[0010] Furthermore, the height of the support surface of the support base and the pedestal is adjustable.

[0011] Furthermore, the ends of the push bolt and the positioning bolt are provided with buffer pads.

[0012] Furthermore, the support surface of the bolt seat is provided with anti-slip texture or rubber pad.

[0013] According to embodiments of the present invention, at least the following beneficial effects are achieved: The present invention integrates the positioning functions of the coupler, traction beam, and bolster beam into a single module. Through a unified installation benchmark and adjustable relative positional relationships, the dimensional accuracy and mutual positional relationships between key components are ensured, avoiding cumulative errors. Furthermore, the modular design allows for overall hoisting or rapid installation onto the main frame via T-slots. The operation of each clamping component is simple, requiring no complex adjustments or measurements, significantly improving welding efficiency. Moreover, the positions of each positioning component are adjustable, the support height is adjustable, and the installation position of the entire module on the main frame is adjustable, enabling it to adapt to the end frame structures of different vehicle models and achieving rapid production changeover.

[0014] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram of the vehicle body chassis; Figure 3 A schematic diagram of the structure on which the vehicle chassis is fixed to the present invention; Figure 4 for Figure 1 A schematic diagram of the structure at point A; Figure 5 for Figure 1 Schematic diagram of the structure at point B; Figure 6 for Figure 1 A schematic diagram of the structure at point C. Detailed Implementation

[0016] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0017] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a corresponding orientation, or be constructed and operated in a corresponding orientation. Therefore, they should not be construed as limiting this invention.

[0018] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0019] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0020] Reference Figures 1-3 The present invention provides a traction pillow fixing module for welding vehicle body underframe. Its core is an integrated installation on a welding device main frame 1 that serves as a basic support. The main frame 1 is typically welded from longitudinal beams 11 and end crossbeams 12. This module integrates all functions for positioning and fixing the key components of the end underframe 97.

[0021] Reference Figure 4The coupler positioning module 31 is used to achieve the initial positioning of the end base frame 97. It includes a second crossbeam 311, which is bolted to the T-slot 13 on the main frame 1 for detachable fixing and longitudinal position adjustment. A coupler positioning seat 312 is detachably installed in the middle of the second crossbeam 311 via bolts. The coupler positioning seat 312 is machined with positioning pins 313 that precisely correspond to the coupler mounting holes 92 of a specific vehicle model. When hoisting the end base frame 97, the operator only needs to align the coupler mounting holes 92 on the base frame and insert the positioning pins 313 to quickly complete the initial longitudinal and lateral positioning of the end base frame in the horizontal plane. Bolt seats 314 are also provided on both sides of the coupler positioning seat 312 to support the end base frame 97 and distribute its weight after positioning. The top surface of the bolt seats 314 can be machined with anti-slip textures or have rubber pads attached to increase friction.

[0022] Reference Figure 5 The traction beam positioning module 32 is used for precise positioning and clamping of the traction beam 93. It includes a crossbeam 321, which is also mounted on the main frame 1 via a T-slot. Two parallel longitudinal beams 322 extend from the middle of the crossbeam 321. A support seat 323 is mounted on the upper surface of each longitudinal beam 322 to support the traction beam 93. The height of the support seat 323 can be finely adjusted to accommodate traction beams with different cross-sectional heights. Multiple push bolts 324 are horizontally and symmetrically mounted on the two longitudinal beams 322. Nylon or copper buffer heads can be installed at the ends of the push bolts 324. After the traction beam 93 is placed on the support seat 323, these push bolts 324 are tightened simultaneously from both sides to firmly clamp the traction beam 93 horizontally, fixing its lateral position and ensuring its symmetry relative to the coupler positioning center.

[0023] Reference Figure 6 The bolster beam positioning module 33 is used to position and fix the bolster beam 94. It includes a crossbeam four 331, which is installed on the main frame via a T-slot. A support seat 332 is installed on the crossbeam four 331 to support the lower surface of the bolster beam 94. Vertical positioning bolts 333 are symmetrically arranged on the crossbeams three 321 and four 331, corresponding to both ends of the bolster beam 94. After the bolster beam 94 is placed on the support seat 332, tightening these positioning bolts 333 can press the bolster beam 94 from above. In addition, a bolster beam positioning block 334 is also installed on the crossbeam three 321, which is bolted and its position can be adjusted along the length of the crossbeam three 321. By adjusting the position of the bolster beam positioning block 334 so that it contacts the end side of the bolster beam 94, the longitudinal position of the bolster beam 94 can be precisely defined.

[0024] Reference Figure 3The crossbeam support module 34 is used to set and support the crossbeam 95 inside the base frame before welding, and to ensure its relative position with the side beam 91. It includes multiple screw-type adjustable support rods, specifically support rods 341 set between adjacent crossbeams 95, and adjustment rods 342 set between the crossbeam 95 and the positioned side beam 91. By rotating the adjusting nuts on these support rods, their lengths can be infinitely changed, thereby precisely setting the height and lateral position of the crossbeam 95, forming a stable internal support frame, effectively preventing the crossbeam from sinking or shifting during welding.

[0025] When using this invention for welding the end of the vehicle body underframe, the operation process is as follows: First, according to the drawings of the vehicle model to be produced, adjust the model or position of the coupler positioning seat 312, adjust the longitudinal position of the bolster beam positioning block 334, and adjust the height of each support seat 323 and support seat 332. Then, install the entire traction bolster fixing module into the predetermined longitudinal position of the main frame 1 through the T-slot 13. Hoist the end underframe 97, align its coupler mounting hole 92 and insert the positioning pin 313 to complete the initial positioning. Next, place the traction beam 93 on the support seat 323 and clamp it from both sides with the push bolt 324. Then place the bolster beam 94 on the support seat 332, press it from above with the positioning bolt 333, and ensure that its end is in contact with the bolster beam positioning block 334. Finally, install and adjust each support rod of the crossbeam support module 34, and set the position of the internal crossbeam 95. At this time, all key components of the end underframe have been accurately positioned and fixed, and subsequent welding operations can be carried out. For different vehicle models, simply readjust the overall position of the relevant adjustable parts and modules according to the steps above to achieve quick switching.

[0026] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A traction pillow fixing module for welding vehicle body underframe, characterized in that: It includes a coupler positioning module (31), a traction beam positioning module (32), a sleeper beam positioning module (33), and a crossbeam support module (34). The coupler positioning module (31) includes a second crossbeam (311) fixedly installed on the main frame (1) of the welding device. A coupler positioning seat (312) is fixedly installed in the middle of the second crossbeam (311). A positioning pin (313) corresponding to the coupler mounting hole (92) is provided on the coupler positioning seat (312). Bolt seats (314) for supporting the end base frame (97) are provided on both sides of the coupler positioning seat (312). The traction beam positioning module (32) includes a crossbeam three (321) fixedly installed on the main frame (1). Two longitudinal beams (322) extend from the middle of the crossbeam three (321). Support seats (323) for supporting the traction beam (93) are provided on the upper surface of the two longitudinal beams (322). Push bolts (324) for pressing on both sides of the traction beam (93) are provided on the two longitudinal beams (322) in a horizontally symmetrical manner. The pillow beam positioning module (33) includes a fourth crossbeam (331) fixedly installed on the main frame (1). The fourth crossbeam (331) is provided with a support seat (332) for supporting the pillow beam (94). The third crossbeam (321) and the fourth crossbeam (331) are symmetrically provided with positioning bolts (333) for clamping the pillow beam (94). The third crossbeam (321) is also fixedly installed with a pillow beam positioning block (334) for limiting the position of the pillow beam. The pillow beam positioning block (334) is in contact with the side end of the pillow beam (94). The crossbeam support module (34) includes a support rod (341) disposed between the crossbeams (95) and an adjustment rod (342) disposed between the crossbeams (95) and the side beams (91), which are used to ensure the overall assembly width dimension of the base frame.

2. The traction pillow fixing module for welding a vehicle body chassis according to claim 1, characterized in that: Both the support rod (341) and the adjusting rod (342) are screw-type adjustable support rods.

3. The traction pillow fixing module for welding a vehicle body chassis according to claim 1, characterized in that: The position of the pillow beam positioning block (334) can be adjusted along the length direction of the crossbeam three (321).

4. The traction pillow fixing module for welding a vehicle body chassis according to claim 1, characterized in that: The coupler positioning seat (312) is detachably mounted on the second crossbeam (311).

5. A bolster-locking module for welding a vehicle chassis frame according to claim 1, characterized in that: The main frame (1) has a T-slot (13) and a bolt mounting notch (14) on its surface for the installation of the second (311), third (321) and fourth (331) crossbeams.

6. A traction pillow fixing module for welding a vehicle body chassis according to claim 1, characterized in that: The height of the support surface of the support base (323) and the support base (332) is adjustable.

7. A traction pillow fixing module for welding a vehicle body chassis according to claim 1, characterized in that: The ends of the push bolt (324) and the positioning bolt (333) are provided with buffer pads.

8. A traction pillow fixing module for welding a vehicle body chassis according to claim 1, characterized in that: The support surface of the bolt seat (314) is provided with anti-slip texture or rubber pad.

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