A tool for separating the car body and bogie of a subway vehicle

Abstract

The present invention discloses a tooling for separating the car body and bogie of a subway vehicle, and the key points of the technical solution include a center pin sleeve, a collar and a jacking screw. An external thread is arranged on the top side of the collar, and the collar is inserted into the center pin sleeve and is threadedly connected with the center pin sleeve; a threaded through hole is arranged on the collar, and the threaded through hole is vertical and connected with the bottom surface of the groove; the jacking screw is screwed into the threaded through hole, and the screw head of the jacking screw is located below the collar. The present invention supports the center pin by means of the force at the threaded connection between the collar and the jacking screw, and the separation between the car body and the bogie is achieved by rotating the jacking screw, without the use of a jack, and with low safety hazards. Moreover, the present invention has a simple structure and is easy to disassemble and assemble.

Description

Technical Field

[0001] The present invention relates to a subway vehicle maintenance technology, and more particularly to a tool for separating a subway vehicle body from a bogie. Background Art

[0002] like Figure 1 As shown, during the production and maintenance of subway vehicles, the car body 1 and the bogie 2 need to be separated. The structure connecting the car body 1 and the bogie 2 is a traction device 3, as shown in FIG. Figure 2 As shown, the subway car's traction device 3 consists of a center pin 31, a center pin sleeve 32, a traction beam 33, and a traction rod 34. The center pin 31 is a single-piece casting, mounted on the underframe of the car body 1, with a tapered lower end connection surface. The center pin sleeve 32 is made of a metal inner sleeve, an outer sleeve, and a rubber vulcanized intermediate layer. The inner sleeve has a tapered surface and connects to the center pin 31. Separating the car body 1 from the bogie 2 involves separating the center pin 31 mounted on the car body 1 from the center pin sleeve 32 mounted on the bogie 2.

[0003] Chinese patent CN112025616B discloses a tool for separating the bogie and body of a subway car, including a disassembly platform for positioning the wheels by positioning wheel plates and positioning wheel grooves; and driving the side mechanism to rise and fall, and positioning the side mechanism in the vertical direction with the bottom surface of the body as a reference; the side mechanism is used to remove the safety bolts and height bolts respectively through a first disassembly mechanism and a second disassembly mechanism; the center mechanism is used to remove the center bolt through a third disassembly mechanism, and is powered by a cylinder; the disassembly mechanism is used to be respectively mounted on the large ends of the safety bolts, height bolts, and center bolts, and pre-clamped with them by a disassembly steel needle; the disassembly mechanism includes a first disassembly mechanism, a second disassembly mechanism, and a third disassembly mechanism, and the first disassembly mechanism, the second disassembly mechanism, and the third disassembly mechanism have the same structure.

[0004] After using the aforementioned patent to remove the bolts 36, lower cover 35, and locating pin 37, the car body 1 (center pin 31) is lifted, and the center pin 31 is separated from the center pin sleeve 32 by the bogie 2's own gravity. However, because the connecting surface is a conical surface with a large contact area, a vacuum state is easily formed, and the two cannot be naturally separated, causing difficulties in production and maintenance. If a jack is used to support the lower plane of the center pin 31 and the upper plane of the traction beam 33, and forcibly separate them, it will cause damage to the rubber part of the center pin sleeve 32 and the rubber joint of the traction rod 34. In addition, the jack support surface is not machined, and the surface levelness cannot be guaranteed, posing a construction safety hazard. Summary of the Invention

[0005] To address the shortcomings of the existing technology, the present invention aims to provide a tool for separating the car body from the bogie of a subway vehicle. This tool utilizes the force at the threaded connection between the collar and the jacking screw to support the center pin. Separation of the car body and bogie is achieved by rotating the jacking screw, eliminating the need for a jack and minimizing safety hazards. Furthermore, the present invention has a simple structure and facilitates assembly and disassembly.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a tool for separating a subway vehicle body from a bogie, comprising a center pin sleeve, a collar and a lifting screw, wherein an external thread is provided on the top side of the collar, the collar is inserted into the center pin sleeve and is threadedly connected to the center pin sleeve; a threaded through hole is provided on the collar, the threaded through hole is vertical and communicates with the bottom surface of the groove; the lifting screw is screwed into the threaded through hole, and the screw head of the lifting screw is located below the collar.

[0007] The present invention is further configured such that: an external hexagonal structure is provided at the bottom of the collar.

[0008] The present invention is further configured such that the diameter of the circumscribed circle of the external hexagonal structure is less than or equal to the outer diameter of the collar.

[0009] The present invention is further configured such that: the thread of the jacking screw is a trapezoidal thread.

[0010] The present invention is further configured to include: a backing plate, a groove is provided on the top surface of the collar, the backing plate is located in the groove, and the backing plate is clamped between the center pin and the jacking screw.

[0011] The present invention is further configured as follows: a limiting groove is further provided on the top surface of the collar, the side wall of the limiting groove is a conical surface, and the groove is communicated with the bottom surface of the limiting groove.

[0012] The present invention is further configured such that the axes of the threaded through hole, the groove and the limiting groove are collinear.

[0013] The present invention is further configured such that: the bottom diameter of the limiting groove is larger than the diameter of the groove.

[0014] The present invention is further configured such that: the diameter of the groove is greater than the diameter of the threaded through hole.

[0015] The present invention is further configured such that the top surface of the collar is in contact with the center pin sleeve.

[0016] In summary, the present invention offers the following advantages over existing technologies: The present invention leverages the force at the threaded connection between the collar and the jacking screw to support the center pin, allowing the car body and bogie to be separated by rotating the jacking screw, eliminating the need for a jack and minimizing safety hazards. Furthermore, the present invention has a simple structure and facilitates assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a traction device that reflects the background technology;

[0018] Figure 2 A schematic diagram of the structure of a central pin sleeve to reflect the background technology;

[0019] Figure 3 This is a structural diagram showing the installation position of Example 1;

[0020] Figure 4 is a full cross-sectional view of the collar in Example 1;

[0021] Figure 5 It is a side view of the jacking screw in Example 1;

[0022] Figure 6 This is a full cross-sectional view of the collar in Example 2.

[0023] In the figure: 1. Car body; 2. Bogie; 3. Traction device; 31. Center pin; 32. Center pin sleeve; 33. Traction beam; 34. Traction rod; 35. Lower cover; 36. Bolt; 37. Locating pin; 4. Ring; 41. External thread; 42. Threaded through hole; 43. External hexagonal structure; 44. Limiting plane; 45. Groove; 46. Limiting slot; 5. Lifting screw; 6. Pad. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the invention.

[0025] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] Example 1

[0027] like Figure 3-5The figure shows the basic structure of Example 1 of the present invention, a tool for separating a subway vehicle body from a bogie, comprising a center pin sleeve 32, a collar 4, and a jacking screw 5. The collar 4 has an external thread 41 on its top side, which is inserted into and threadedly connected to the center pin sleeve 32. The collar 4 defines a threaded through-hole 42, which is vertical and communicates with the bottom surface of a groove 45. The jacking screw 5 is screwed into the threaded through-hole 42, with its head positioned below the collar 4. In this embodiment, the jacking screw 5 is a hexagonal jacking screw.

[0028] To separate the carbody 1 and bogie 2, the lifting screw 5 is screwed upward until it rests on the bottom surface of the center pin 31, lifting the center pin 31 and separating the tapered surface of the center pin sleeve 32 from the center pin 31. This embodiment utilizes internal threading directly on the metal inner sleeve of a conventional center pin sleeve. The threaded connection between the collar 4 and the metal inner sleeve facilitates installation and replacement of the collar 4 based on wear.

[0029] Specifically, an outer hexagonal structure 43 is provided at the bottom of the collar 4, so that the operator can disassemble and assemble the collar 4 by means of a socket wrench or other tool.

[0030] Specifically, the circumscribed diameter of the outer hexagonal structure 43 is less than or equal to the outer diameter of the collar 4. A limiting plane 44 is formed between the outer thread 41 of the collar 4 and the outer hexagonal structure 43. When an operator uses a tool such as a socket wrench to remove or install the collar 4, the limiting plane 44 can limit the position of the tool, ensuring that the tool is accurately installed on the outer hexagonal structure 43. In this embodiment, the circumscribed diameter of the outer hexagonal structure 43 is equal to the outer diameter of the collar 4.

[0031] Specifically, the thread of the jacking screw 5 is a trapezoidal thread. Since the center pin 31 is supported primarily by the force at the threaded connection between the collar 4 and the jacking screw 5 during separation of the car body 1 and the bogie 2, high thread strength is required. A trapezoidal thread is a continuous, helical raised portion with a specific cross-section formed on a cylindrical surface, primarily used for transmission and fastening large parts. Compared to ordinary threads, the trapezoidal thread connection is less prone to loosening and has a high root strength, thereby extending the service life of this embodiment.

[0032] This embodiment further includes a backing plate 6. A groove 45 is provided on the top surface of the collar 4. The backing plate 6 is located in the groove 45 and is sandwiched between the center pin 31 and the lifting screw 5. The backing plate 6 can effectively reduce frictional contact between the lifting screw 5 and the center pin 31, thereby protecting the center pin 31 and the lifting screw 5.

[0033] Specifically, the axis of the threaded through hole 42 and the axis of the groove 45 are colinear.

[0034] Specifically, the diameter of the groove 45 is larger than the diameter of the threaded through hole 42 to prevent the center pin 31 from sinking into the threaded through hole 42 under the action of gravity and damaging the threads of the threaded through hole 42 .

[0035] Specifically, the top surface of the collar 4 is flat, and the top surface of the collar 4 is in contact with the metal inner sleeve. The contact between the top surface of the collar 4 and the metal inner sleeve realizes the position limiting of the collar 4 and helps to tighten the collar 4 on the metal inner sleeve.

[0036] In summary, this embodiment utilizes the force at the threaded connection between the collar 4 and the jacking screw 5 to support the center pin 31. The car body 1 and bogie 2 can be separated by rotating the jacking screw 5, eliminating the need for a jack and minimizing safety hazards. Furthermore, this embodiment has a simple structure and facilitates assembly and disassembly.

[0037] Example 2

[0038] like Figure 6 As shown, embodiment 2 of the present invention is a tool for separating a subway vehicle body from a bogie. This embodiment differs from embodiment 1 in that a limiting groove 46 is further provided on the top surface of the collar 4. The sidewall of the limiting groove 46 is a tapered surface, and the groove 45 is connected to the bottom surface of the limiting groove 46. The tapered surface can abut against the tapered surface of the center pin 31 to limit the position of the center pin 31.

[0039] In this embodiment, the axes of the threaded through hole 42, the groove 45 and the limiting groove 46 are collinear. The bottom diameter of the limiting groove 46 is larger than the diameter of the groove 45 to ensure that the gasket abuts against the center position of the bottom surface of the center pin 31.

[0040] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A tool for separating a subway vehicle body from a bogie, comprising a center pin sleeve (32), characterized in that: It also includes a collar (4) and a lifting screw (5), wherein the collar (4) is provided with an external thread (41) on the top side, and the collar (4) is inserted into the center pin sleeve (32) and is threadedly connected with the center pin sleeve (32); a threaded through hole (42) is provided on the collar (4), and the threaded through hole (42) is vertical and communicated with the bottom surface of the groove (45); the lifting screw (5) is screwed into the threaded through hole (42), and the screw head of the lifting screw (5) is located below the collar (4); The tooling also includes a backing plate (6), the top surface of the collar (4) is provided with a groove (45), the backing plate (6) is located in the groove (45), and the backing plate (6) is clamped between the center pin (31) and the jacking screw (5); The top surface of the collar (4) is also provided with a limiting groove (46), the side wall of the limiting groove (46) is a conical surface, and the groove (45) is connected to the bottom surface of the limiting groove (46); The axes of the threaded through hole (42), the groove (45) and the limiting groove (46) are collinear.

2. The tooling for separating a subway vehicle body from a bogie according to claim 1, characterized in that: An external hexagonal structure (43) is provided at the bottom of the collar (4).

3. The tooling for separating the body and bogie of a subway vehicle according to claim 2, characterized in that: The diameter of the circumscribed circle of the external hexagonal structure (43) is less than or equal to the outer diameter of the collar (4).

4. A tool for separating a subway vehicle body from a bogie according to any one of claims 1 to 3, characterized in that: The thread of the lifting screw (5) is a trapezoidal thread.

5. The tooling for separating a subway vehicle body from a bogie according to claim 1, characterized in that: The bottom surface diameter of the limiting groove (46) is greater than the diameter of the groove (45).

6. The tooling for separating the metro vehicle body from the bogie according to claim 5, characterized in that: The diameter of the groove (45) is greater than the diameter of the threaded through hole (42).

7. The tooling for separating a subway vehicle body from a bogie according to claim 1, characterized in that: The top surface of the collar (4) is in contact with the center pin sleeve (32).

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