A boring device for a bogie of a railway vehicle

Abstract

This invention relates to the field of rail vehicle manufacturing and maintenance equipment technology, and in particular to a rail vehicle bogie boring device. It includes a placement base, a frame on the upper surface of the placement base, a fixed frame fixedly connected to the upper surface of the placement base, a support mechanism for supporting one end of the frame on the upper surface of the placement base, a lifting mechanism for lifting the other end of the frame on one side of the fixed frame, and positioning mechanisms for positioning the frame on both sides of the placement base. By setting up a synchronous frame, connecting frame, telescopic rod, support base, flipping frame, and positioning frame, both ends of the frame can be positioned and supported, and the frame can be flipped, facilitating frame positioning and adjustment of the placement angle, i.e., facilitating adjustment and positioning of different machined surfaces of the frame. With the help of a transverse rod and the sliding support of the mounting base, the overall transverse adjustment of the placement base can be realized, facilitating the positioning and adjustment of the boring position of the frame.

Description

Technical Field

[0001] This invention relates to the field of railway vehicle manufacturing and maintenance equipment technology, and in particular to a railway vehicle bogie boring device. Background Technology

[0002] As a key component of rail vehicles, the performance of the bogie directly affects the safety and stability of train operation. A bogie typically consists of a frame, wheelsets, suspension system, and braking system. During manufacturing and maintenance, boring is an important machining process used to install various components and ensure precise fit between them.

[0003] However, existing boring operations for rail vehicle bogies have the following problems:

[0004] When using a boring machine to bore a bogie, the positioning of the bogie is inconvenient. Due to the complex structure and irregular shape of the bogie, traditional positioning methods are difficult to quickly and accurately determine its position on the boring machine, resulting in low positioning accuracy and affecting the accuracy of boring and machining quality.

[0005] On the other hand, different surfaces of the bogie often require boring operations. Existing devices cannot easily flip and move the bogie, and after flipping and moving, it is difficult to achieve rapid positioning, making the entire boring process inefficient and increasing processing and time costs. Summary of the Invention

[0006] In view of the existence of the above-mentioned prior art, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide a boring device for a railway vehicle bogie.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A placement base is included, the upper surface of which is provided with a frame, a fixing frame is fixedly connected to the upper surface of which, the upper surface of which is provided with a support mechanism for supporting one end of the frame, a lifting mechanism for lifting the other end of the frame is provided on one side of the fixing frame, positioning mechanisms for positioning the frame are provided on both sides of the placement base, and a traction mechanism for moving and pulling the support mechanism is provided on the upper surface of which; two symmetrically arranged sliding frames are fixedly connected to the lower surface of which, two symmetrically arranged transverse rods are slidably connected through one side of each sliding frame, both ends of the two transverse rods are fixedly connected to mounting bases, and a propulsion mechanism for moving and advancing the side of the placement base is provided on the lower surface of which.

[0009] In a preferred embodiment of the boring device for a rail vehicle bogie according to the present invention, the supporting mechanism includes a synchronous frame slidably connected to the upper surface of the placement base. A telescopic rod is fixedly connected to the upper surface of the synchronous frame. A connecting frame is fixedly connected between two telescopic rods. A supporting base is fixedly connected to the telescopic end of the telescopic rod. A flipping frame is rotatably connected inside the supporting base. Positioning frames are fixedly connected to both sides of the flipping frame. A push tube is fixedly connected to one side of the positioning frame. The push tube passes through the flipping frame. A retaining ball is provided at one end of the push tube. A push spring is elastically connected between the retaining ball and the positioning frame. One end of the push spring is fixedly connected to the positioning frame.

[0010] As a preferred embodiment of the boring device for a bogie of a rail vehicle according to the present invention, the lifting mechanism includes a traction frame slidably connected to one side of a fixed frame, a following cylinder rotatably connected to both sides of the traction frame, a contact frame rotatably connected to the telescopic end of the following cylinder, the contact frame contacting and abutting the bottom of the frame, and a co-positioning frame fixedly connected between the two contact frames.

[0011] As a preferred embodiment of the boring device for a rail vehicle bogie according to the present invention, the traction mechanism includes a transverse sliding screw rotatably connected in the middle moving groove, a reinforcing frame fixedly connected to the upper end face of the synchronization frame, the transverse sliding screw threadedly connected to the reinforcing frame, the reinforcing frame slidably connected in the middle moving groove, guide rods fixedly connected in both transverse sliding grooves, the synchronization frame slidably connected to the two guide rods, a drive motor fixedly connected to one side of the placement base, and the output shaft of the drive motor fixedly connected to the transverse sliding screw.

[0012] As a preferred embodiment of the boring device for a railway vehicle bogie according to the present invention, the fixed frame has two symmetrically arranged guide grooves on one side, and two symmetrically arranged positioning rods are fixedly connected in the guide grooves. The traction frame is slidably connected to the two positioning rods. A drive groove is provided on one side of the fixed frame, and a traction screw is rotatably connected in the drive groove. The traction screw passes through a threaded contact frame. A mounting frame is fixedly connected to the upper end face of the fixed frame, and a lifting motor is fixedly connected to the upper end face of the mounting frame. The output shaft of the lifting motor is fixedly connected to the traction screw.

[0013] In a preferred embodiment of the boring device for a rail vehicle bogie according to the present invention, the positioning mechanism includes a plurality of adjusting cylinders disposed on both sides of the base. The telescopic ends of the adjusting cylinders are fixedly connected to a movable frame. A side abutment cylinder is fixedly connected through one side of the movable frame. A stop block is fixedly connected to the telescopic end of the side abutment cylinder. A pressing cylinder is fixedly connected through the upper end face of the movable frame. A pressing block is fixedly connected to the telescopic end of the pressing cylinder. The plurality of pressing blocks are in contact with and abut against both sides of the frame. The pressing blocks are in contact with and abut against the upper end face of the frame.

[0014] As a preferred embodiment of the boring device for a bogie of a rail vehicle according to the present invention, a rotary motor is provided below the base of the propulsion mechanism, two rotating shafts are provided above the rotary motor, drive gears are fixedly connected to the side walls of the two rotating shafts, the output shaft of the rotary motor is fixedly connected to one of the rotating shafts, a fixed toothed plate is fixedly connected to the lower end face of the base, a traction gear is fixedly connected to the side wall of the rotating shaft, and the two traction gears on both sides mesh with the fixed toothed plate.

[0015] The beneficial effects of the present invention on the boring device for railway vehicle bogies are as follows:

[0016] 1. The present invention is provided with a synchronous frame, a connecting frame, a telescopic rod, a support base, a flipping frame, and a positioning frame, etc., which, together with the contact frame, the synchronous frame, and the following cylinder, can provide positioning support for both ends of the frame and drive the frame to flip, which facilitates the positioning of the frame and the adjustment of the placement angle of the frame, that is, facilitates the adjustment and positioning of different processing surfaces of the frame.

[0017] 2. The present invention is provided with a mounting base, a transverse rod, a sliding frame, a rotary motor, a fixed toothed plate, and a drive gear. By cooperating with the fixed toothed plate at the bottom of the mounting base and the traction gear, and with the help of the transverse rod and the sliding support of the mounting base, the overall transverse movement adjustment of the mounting base can be realized, which facilitates the positioning and adjustment of the boring position of the frame. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view schematic diagram of a bogie boring device for railway vehicles.

[0020] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0021] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point B.

[0022] Figure 4 This is a schematic diagram of the internal structure of the positioning frame of a bogie boring device for rail vehicles.

[0023] Figure 5 This is a schematic diagram of the bottom structure of a bogie boring device for railway vehicles.

[0024] Figure 6 This is an enlarged schematic diagram of the structure at point C in section 5.

[0025] Figure 7 A side view of a boring device for a rail vehicle bogie.

[0026] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point D

[0027] In the diagram: 1. Placement base; 2. Frame; 3. Moving slot; 4. Guide rod; 5. Moving block; 6. Synchronizing frame; 7. Connecting frame; 8. Telescopic rod; 9. Support base; 10. Tilting frame; 11. Positioning frame; 12. Propulsion tube; 13. Propulsion spring; 14. Holding ball; 15. Lateral screw; 16. Reinforcing frame; 17. Fixing frame; 18. Drive motor; 19. Guide slot; 20. Traction frame; 21. Following cylinder; 22. Contact frame; 23. Same 24. Positioning rod; 25. Limiting groove; 26. Limiting block; 27. Drive groove; 28. Traction screw; 29. ​​Mounting frame; 30. Lifting motor; 31. Mounting base; 32. Horizontal movement rod; 33. Sliding frame; 34. Rotary motor; 35. Drive gear; 36. Rotating shaft; 37. Traction gear; 38. Fixed toothed plate; 39. Adjusting cylinder; 40. Moving frame; 41. Side abutment cylinder; 42. Abutment block; 43. Pressing cylinder; 44. Pressing block. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0031] Example 1

[0032] Reference Figures 1-6 This is the first embodiment of the present invention. This embodiment provides a boring device for a rail vehicle bogie, which can achieve the effect of contact positioning and convenient flipping of the bogie 2 during the processing. It includes a placement base 1, the upper end surface of the placement base 1 is provided with the bogie 2, the upper end surface of the placement base 1 is fixedly connected to a fixing frame 17, the upper end surface of the placement base 1 is provided with a support mechanism for supporting one end of the bogie 2, the support mechanism includes a synchronous frame 6 slidably connected to the upper end surface of the placement base 1, the upper end surface of the synchronous frame 6 is fixedly connected to a telescopic rod 8, a connecting frame 7 is fixedly connected between the two telescopic rods 8, the telescopic end of the telescopic rod 8 is fixedly connected to a support base 9, a flipping frame 10 is rotatably connected inside the support base 9, a positioning frame 11 is fixedly connected to both sides of the flipping frame 10, a push tube 12 is fixedly connected to one side of the positioning frame 11, the push tube 12 passes through the flipping frame 10, one end of the push tube 12 is provided with a pressing ball 14, a push spring 13 is elastically connected between the pressing ball 14 and the positioning frame 11, and one end of the push spring 13 is fixedly connected to the positioning frame 11.

[0033] A lifting mechanism for lifting the other end of the frame 2 is provided on one side of the fixed frame 17. The lifting mechanism includes a traction frame 20 slidably connected to one side of the fixed frame 17. Follower cylinders 21 are rotatably connected to both sides of the traction frame 20. Contact frames 22 are rotatably connected to the telescopic end of the follower cylinders 21. The contact frames 22 are in contact with the bottom of the frame 2. A co-position frame 23 is fixedly connected between the two contact frames 22.

[0034] Two symmetrically arranged guide grooves 19 are provided on one side of the fixed frame 17. Two symmetrically arranged positioning rods 24 are fixedly connected in the guide grooves 19. The traction frame 20 is slidably connected to the two positioning rods 24. A drive groove 27 is provided on one side of the fixed frame 17. A traction screw 28 is rotatably connected in the drive groove 27. The traction screw 28 passes through the threaded contact frame 22. A mounting frame 29 is fixedly connected to the upper end face of the fixed frame 17. A lifting motor 30 is fixedly connected to the upper end face of the mounting frame 29. The output shaft of the lifting motor 30 is fixedly connected to the traction screw 28.

[0035] The upper surface of the base 1 is provided with a traction mechanism for supporting the movement of the mechanism. The traction mechanism includes a transverse screw 15 rotatably connected in the middle moving groove 3. A reinforcing frame 16 is fixedly connected to the upper surface of the timing frame 6. The transverse screw 15 is threaded through and connected to the reinforcing frame 16. The reinforcing frame 16 is slidably connected in the middle moving groove 3. Guide rods 4 are fixedly connected in both transverse grooves. The timing frame 6 is slidably connected to the two guide rods 4. A drive motor 18 is fixedly connected to one side of the base 1. The output shaft of the drive motor 18 is fixedly connected to the transverse screw 15.

[0036] When using, such as Figure 1-6 As shown, the frame 2 is first placed on two tilting frames 10 on one side by means of hoisting, as... Figure 1 As shown, the frame 2 is mounted inside the tilting frame 10, with the other end placed on the contact frames 22 on both sides. At this time, the synchronous frame 6 and the connecting frame 7 provide contact support for the two tilting frames 10. The tilting frame 10 is rotatably connected to the support base 9, which can provide rotational support for the frame 2 when it is tilted. The transverse screw 15 located in the middle moving groove 3 is threadedly connected to the synchronous frame 6, which can keep the synchronous frame 6 locked in the non-moving state. That is, the base 1 is placed above the boring machine placement frame, which can easily adjust its placement position and perform contact positioning at the end and bottom. During this process, the push spring 13 in the push tube 12 on the positioning frame 11 drives the abutment ball 14 to make contact positioning with the frame 2 on both sides, which can provide contact positioning while avoiding interference with the tilting of the frame 2.

[0037] When it is necessary to adjust the surface of the boring hole of the frame 2, the drive motor 18 and the lifting motor 30 are started simultaneously, which drive the rotation of the transverse screw 15 and the traction screw 28 respectively. The transverse screw 15 is threadedly connected to the synchronous frame 6. Under the sliding guidance of the moving groove 3 and the moving block 5, it can drive the synchronous frame 6, the support base 9 and the flipping frame 10 to move above the placement base 1. At the same time, the traction screw 28 is threadedly connected to the traction frame 20, which can drive the two side following cylinders 21, the contact frame 22 and the synchronous upward movement of the following cylinder 21. At this time, the guide groove 19 and the positioning rod 24 can provide sliding guidance for the up and down movement of the contact frame 22. At the same time, the limit block 26 is slidably connected in the limit groove 25, which can provide over-sliding limit for the contact frame 22 during the up and down movement, ensuring the stability of the contact frame 22 in the up and down movement of the fixed frame 17.

[0038] The synchronous movement of the flipping frame 10 and the contact frame 22 can drive the frame 2 to gradually move from the horizontal direction to the vertical direction between the placement base 1 and the fixed frame 17. At this time, the flipping frame 10 rotates on the support base 9 and can follow the frame 2 to flip and adjust. At the same time, the contact frame 22 flips along with the frame 23. At this time, the following cylinder 21 extends and retracts according to the movement of the frame 2 to maintain the stability of the frame 2 during the flipping process and the positioning support after flipping, that is, to facilitate the adjustment of the frame 2 from the horizontal processing state to the vertical state.

[0039] Example 2

[0040] Reference Figures 5-8 This is a second embodiment of the present invention. This embodiment provides a boring device for a rail vehicle bogie, which can achieve a convenient moving and positioning effect for the base 1 placed on the bogie 2 during the processing. It includes positioning mechanisms for positioning the bogie 2 on both sides of the base 1. The positioning mechanism includes multiple adjusting cylinders 39 arranged on both sides of the base 1. The telescopic end of the adjusting cylinder 39 is fixedly connected to a moving frame 40. A side abutting cylinder 41 is fixedly connected through one side of the moving frame 40. A stop block 42 is fixedly connected to the telescopic end of the side abutting cylinder 41. A pressing cylinder 43 is fixedly connected through the upper end face of the moving frame 40. A pressing block 44 is fixedly connected to the telescopic end of the pressing cylinder 43. Multiple pressing blocks 44 are in contact with and abut against both sides of the bogie 2. The pressing blocks 44 are in contact with and abut against the upper end face of the bogie 2.

[0041] Two symmetrically arranged sliding frames 33 are fixedly connected to the lower end face of the base 1. Two symmetrically arranged transverse rods 32 are slidably connected through one side of the sliding frame 33. The two ends of the two transverse rods 32 are fixedly connected to the mounting base 31. The lower end face of the base 1 is provided with a propulsion mechanism for moving the base 1 to the side. A rotary motor 34 is provided below the propulsion mechanism of the base 1. Two rotating shafts 36 are provided above the rotary motor 34. Drive gears 35 are fixedly connected to the side walls of the two rotating shafts 36. The output shaft of the rotary motor 34 is fixedly connected to one side of the rotating shaft 36. A fixed toothed plate 38 is fixedly connected to the lower end face of the base 1. Traction gears 37 are fixedly connected to the side walls of the rotating shafts 36. Both traction gears 37 on both sides mesh with the fixed toothed plate 38.

[0042] In use, the rotary motor 34 is first installed below the workpiece placement position on the boring machine, and the rotating shaft 36 is simultaneously installed at the workpiece placement position on the boring machine. As the rotary motor 34 drives one side of the rotating shaft 36 to rotate, the drive gears 35 on the side walls of the two rotating shafts 36 mesh, causing the two rotating shafts 36 to rotate relative to each other. Simultaneously, this drives the traction gears 37 to rotate. At this time, the two traction gears 37 on both sides mesh with the fixed gear plate 38. Since the fixed gear plate 38 has teeth on both sides, the meshing of the two traction gears 37 with the fixed gear plate 38 simultaneously drives the workpiece placement position on the boring machine. The movement of the base 1 is achieved through the meshing transmission of the drive gear 35 and the meshing transmission of the traction gear 37 and the fixed tooth plate 38. This allows for convenient lateral adjustment of the base 1 while the meshing of the traction gear 37 and the fixed tooth plate 38 provides a limit lock for the base 1, thus maintaining its stability when not moving laterally. During this process, multiple mounting bases 31 are installed at the loading position of the boring machine. At this time, the transverse rod 32 and the sliding frame 33 provide sliding support for the base 1, thus maintaining the smoothness of the base 1 during movement.

[0043] Place base 1 in such Figure 1 When the installation position is shown, the extension and retraction of the adjusting cylinder 39 can drive the movement of the moving frame 40, which in turn drives the side abutment cylinder 41 and the pressing cylinder 43 to follow the movement of the moving frame 40. At this time, the extension of the side abutment cylinder 41 can drive the abutment block 42 to contact and abut against the side of the placement base 1, and the extension of the pressing cylinder 43 can drive the pressing block 44 to move down and contact the upper end surface of the frame 2, thus keeping the frame 2 in a stable state when it is in a horizontal position on the placement base 1. When it is necessary to adjust the frame 2 to a vertical state, the extension adjusting cylinder 39 drives the abutment block 42 and the pressing block 44 to disengage from the frame 2, thus releasing the fixed state of the frame 2, and then the processing surface direction of the frame 2 can be adjusted.

[0044] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure performing the function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0046] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A boring device for a railway vehicle bogie, characterized in that: The device includes a base (1), a frame (2) on the upper surface of the base (1), a fixed frame (17) fixedly connected to the upper surface of the base (1), a support mechanism for supporting one end of the frame (2) on the upper surface of the base (1), a lifting mechanism for lifting the other end of the frame (2) on one side of the fixed frame (17), a positioning mechanism for positioning the frame (2) on both sides of the base (1), and a traction mechanism for moving and pulling the support mechanism on the upper surface of the base (1). The lower end face of the placement base (1) is fixedly connected to two symmetrically arranged sliding frames (33). One side of the sliding frame (33) is slidably connected to two symmetrically arranged transverse rods (32). Both ends of the two transverse rods (32) are fixedly connected to mounting bases (31). The lower end face of the placement base (1) is provided with a propulsion mechanism for moving and advancing the side of the placement base (1).

2. The boring device for a railway vehicle bogie as described in claim 1, characterized in that: The support mechanism includes a synchronous frame (6) slidably connected to the upper surface of the placement base (1). A telescopic rod (8) is fixedly connected to the upper surface of the synchronous frame (6). A connecting frame (7) is fixedly connected between the two telescopic rods (8). A support base (9) is fixedly connected to the telescopic end of the telescopic rod (8). A flipping frame (10) is rotatably connected inside the support base (9). A positioning frame (11) is fixedly connected to both sides of the flipping frame (10). A push tube (12) is fixedly connected to one side of the positioning frame (11). The push tube (12) passes through the flipping frame (10). A pressing ball (14) is provided at one end of the push tube (12). A push spring (13) is elastically connected between the pressing ball (14) and the positioning frame (11). One end of the push spring (13) is fixedly connected to the positioning frame (11).

3. The boring device for a railway vehicle bogie as described in claim 2, characterized in that: The lifting mechanism includes a traction frame (20) slidably connected to one side of the fixed frame (17). Both sides of the traction frame (20) are rotatably connected to a following cylinder (21). The telescopic end of the following cylinder (21) is rotatably connected to a contact frame (22). The contact frame (22) contacts and abuts against the bottom of the frame (2). A co-position frame (23) is fixedly connected between the two contact frames (22). Limiting grooves (25) are opened on both sides of the fixed frame (17). Two symmetrically arranged limiting blocks (26) are fixedly connected to the inner side of the contact frame (22). The limiting blocks (26) are slidably connected in the limiting grooves (25).

4. The boring device for a railway vehicle bogie as described in claim 3, characterized in that: The traction mechanism includes a transverse screw (15) rotatably connected in the middle moving groove (3), a reinforcing frame (16) fixedly connected to the upper end face of the synchronization frame (6), the transverse screw (15) threadedly connected to the reinforcing frame (16), the reinforcing frame (16) slidably connected in the middle moving groove (3), and guide rods (4) fixedly connected in both sides of the moving groove (3). Multiple moving blocks (5) are fixedly connected to the lower end face of the synchronization frame (6), the moving blocks (5) slidably connected in the moving groove (3), and the two guide rods (4) slidably connected to the moving blocks (5). A drive motor (18) is fixedly connected to one side of the placement base (1), and the output shaft of the drive motor (18) is fixedly connected to the transverse screw (15).

5. The boring device for a railway vehicle bogie as described in claim 4, characterized in that: Two symmetrically arranged guide grooves (19) are provided on one side of the fixed frame (17). Two symmetrically arranged positioning rods (24) are fixedly connected in the guide grooves (19). The traction frame (20) is slidably connected to the two positioning rods (24). A drive groove (27) is provided on one side of the fixed frame (17). A traction screw (28) is rotatably connected in the drive groove (27). The traction screw (28) passes through the threaded contact frame (22). A mounting frame (29) is fixedly connected to the upper end face of the fixed frame (17). A lifting motor (30) is fixedly connected to the upper end face of the mounting frame (29). The output shaft of the lifting motor (30) is fixedly connected to the traction screw (28).

6. The boring device for a railway vehicle bogie as described in claim 5, characterized in that: The positioning mechanism includes multiple adjusting cylinders (39) disposed on both sides of the base (1). The telescopic end of the adjusting cylinder (39) is fixedly connected to a movable frame (40). A side abutment cylinder (41) is fixedly connected through one side of the movable frame (40). A stop block (42) is fixedly connected to the telescopic end of the side abutment cylinder (41). A pressing cylinder (43) is fixedly connected through the upper end of the movable frame (40). A pressing block (44) is fixedly connected to the telescopic end of the pressing cylinder (43). Multiple pressing blocks (44) contact and abut against both sides of the frame (2). The pressing block (44) contacts and abuts against the upper end of the frame (2).

7. The boring device for a railway vehicle bogie as described in claim 6, characterized in that: A rotary motor (34) is provided below the base (1) of the propulsion mechanism. Two rotating shafts (36) are provided above the rotary motor (34). Drive gears (35) are fixedly connected to the side walls of the two rotating shafts (36). The output shaft of the rotary motor (34) is fixedly connected to one of the rotating shafts (36). A fixed toothed plate (38) is fixedly connected to the lower end face of the base (1). A traction gear (37) is fixedly connected to the side wall of the rotating shaft (36). Both traction gears (37) on both sides mesh with the fixed toothed plate (38).

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