An online measuring device and method for heavy-duty traction pins of GK type diesel locomotives.

Abstract

This invention discloses an online measuring device and method for heavy-duty traction pins of GK type diesel locomotives. A disc is provided at the rear of the traction pin. The online measuring device includes a U-shaped measuring frame and a measuring ruler. The U-shaped measuring frame includes a U-shaped frame body, the inner height and width of which are greater than the width of the traction pin's height. Magnetic seats with flush outer end faces are vertically arranged at both ends of the frame body, and vertical measuring slots are formed on both vertical sides. The online measuring device for heavy-duty traction pins of GK type diesel locomotives provided by this invention has a simple structure, is convenient to manufacture and operate on-site, and has low investment costs. Combined with its measuring method, the measurement is convenient, efficient, and does not damage the locomotive body.

Description

Technical Field

[0001] This invention belongs to the field of machinery and relates to an online measuring device and method for heavy-duty traction pins of GK type diesel locomotives. Background Technology

[0002] The GK type diesel locomotive is a new type of locomotive suitable for shunting and short-distance operations in railways, metallurgical plants, petrochemical plants, ports, and local railways. The traction pin of the GK type diesel locomotive is a crucial component that transmits power to the locomotive and ensures the bogies move within limits; it is located in the lower part of the car body (e.g., Figure 1 and Figure 2 As shown, after long-term use, diesel locomotives often experience excessive deformation of their traction pins. Considering cost and spare parts procurement cycles, companies often disassemble traction pins from scrapped locomotives of the same type to weld replacements for those with excessive deformation. The welding replacement process is as follows: traction pin inspection -- ultrasonic testing of R-angle forgings -- dimensional verification -- online assembly -- online measurement -- online welding -- weld surface and weld leg dimension inspection -- delivery for use. During the replacement process, the traction pin needs to be assembled online and restored to its original dimensions when the locomotive was newly manufactured. In actual operation, according to the technical specifications, the deviation of the traction pin from the longitudinal centerline of the main frame should be ≤1.5mm, and the verticality of the lower plane of the two middle beams of the main frame of the traction pin should be ≤1mm within the entire length of the traction pin. However, after the traction pin is positioned and installed, there are difficulties in online measurement, mainly in the following aspects: 1. Mechanical measuring equipment cannot be used for online measurement; 2. Due to the wide measurement range and the need for simultaneous front-to-back and left-to-right measurements, it is impossible to meet the standards by using conventional manual measurement with a single tool; 3. Because the traction pin is larger at the top and smaller at the bottom, the deviation of the traction pin from the longitudinal centerline of the main frame of ≤1.5mm must be measured in mid-air, and the horizontal accuracy must be guaranteed, which is difficult to solve entirely by manual means. Summary of the Invention

[0003] To address the problem of difficulty in measuring the heavy-duty traction pin of GK type diesel locomotives after installation, as described in the background art, this invention provides an online measuring device and method for the heavy-duty traction pin of GK type diesel locomotives. The online measuring device has a simple structure, is easy to manufacture and operate on-site, has low investment costs, and provides convenient and efficient measurement without damaging the locomotive body.

[0004] The technical solution of this invention to solve the technical problem is as follows:

[0005] This invention discloses an online measuring device for heavy-duty traction pins of GK type diesel locomotives. The traction pin has a disc at its rear. The online measuring device includes a U-shaped measuring frame and a measuring ruler. The U-shaped measuring frame includes a U-shaped frame body. The inner height and width of the frame body are greater than the height and width of the traction pin, respectively. Magnetic seats with flush outer end faces are vertically arranged at both ends of the frame body, and vertical measuring slots are opened on both vertical sides of the frame body.

[0006] Furthermore, the measuring ruler is a level.

[0007] Furthermore, the frame body is made of square steel with a specification of 50×50mm.

[0008] This invention discloses an online measurement method for heavy-duty traction pins of GK type diesel locomotives, which utilizes the online measurement device for heavy-duty traction pins of GK type diesel locomotives described in the above technical solution. The specific steps are as follows:

[0009] S1. First, make the online measuring device for the heavy-duty traction pin of the GK type diesel locomotive according to the specifications of the traction pin of the GK type diesel locomotive to be measured.

[0010] S2. After the disc of the traction pin is fixedly installed on the bottom plate of the GK type diesel locomotive, the two magnetic seats of the "U"-shaped measuring frame of the online measuring device for the heavy traction pin of the GK type diesel locomotive are installed on the bottom plate of the GK type diesel locomotive on both sides of the traction pin.

[0011] S3. Select two circumferential positions on the top and bottom of the traction pin as the first and second detection points, respectively.

[0012] S4. Pass the measuring ruler vertically through the two measuring slots respectively, and measure the distance from the first detection point and the second detection point to both sides of the frame body respectively, and then calculate and judge the deviation of the traction pin relative to the longitudinal center line of the GK type diesel locomotive main frame.

[0013] S5. Rotate the "U"-shaped measuring frame around the circumference of the traction pin to change the measuring position, and then measure the first detection point and the second detection point respectively according to step S4 and calculate and judge the deviation of the traction pin relative to the longitudinal center line of the main frame of the GK type diesel locomotive.

[0014] S6. Based on the multiple measurements taken at the first and second detection points, determine the deviation of the traction pin from the longitudinal centerline of the main frame of the GK type diesel locomotive.

[0015] Compared with the prior art, the on-line measuring device for heavy traction pins of GK type diesel locomotives described in the present invention is novel and reasonable in design, simple and compact in structure, convenient in material selection during manufacturing, portable, low in investment cost. When combined with its measuring method, it can effectively ensure the on-line measuring effect and efficiency after the installation of the traction pins, without damaging the body, and has strong practicability. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural view of the GK type diesel locomotive in the present invention;

[0017] Figure 2 It is a schematic structural view of the traction pin in the present invention;

[0018] Figure 3 It is a front view schematic of the on-line measuring device for heavy traction pins of GK type diesel locomotives in the present invention;

[0019] Figure 4 It is a three-dimensional view schematic of the on-line measuring device for heavy traction pins of GK type diesel locomotives in the present invention;

[0020] Figure 5 It is a schematic structural view of the "U" - shaped measuring frame in the present invention;

[0021] In the figure: 1. Bottom plate of GK type diesel locomotive; 2. Traction pin; 21. Disc; 22. First detection point; 23. Second detection point; 3. "U" - shaped measuring frame; 31. Frame body; 32. Magnetic base; 33. Measuring groove; 4. Measuring ruler; 5. GK type diesel locomotive. Detailed Description of the Invention

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art belonging to the field of this disclosure. The "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "horizontal", "vertical", etc. used in the specification and claims of this patent application of the present disclosure are only used to represent relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. "Connection" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Those not detailed in the present invention are all well - known technologies in the technical field of the present invention.

[0024] Example 1:

[0025] like Figures 1 to 5 As shown, this invention discloses an online measuring device for heavy-duty traction pins of GK type diesel locomotives. The traction pin 2 has a disc 21 at its rear for mounting on the GK type diesel locomotive floor plate 1. The pin body is wider at the rear than at the front. After installation, the deviation of the traction pin 2 from the longitudinal centerline of the main frame needs to be measured to ensure that the deviation is ≤1.5mm. The online measuring device for heavy-duty traction pins of GK type diesel locomotives includes a U-shaped measuring frame 3 and a measuring ruler 4, which can be a horizontal ruler. The U-shaped measuring frame 3 is made of 50×50mm square steel. It includes a U-shaped frame body 31. The inner height and width of the frame body 31 are greater than the height and width of the traction pin 2, respectively, so as to facilitate the measurement of the traction pin 2 by setting it on the outside of the traction pin 2. Magnetic seats 32 with their outer end faces flush are respectively set vertically at both ends of the frame body 31, so as to facilitate the setting of the frame body 31 on the bottom plate 1 of the GK type diesel locomotive, and also to facilitate the adjustment of the angle of the frame body 31. In addition, for the convenience of measurement, vertical measuring grooves 33 are opened on both sides of the frame body 31. During measurement, the measuring ruler 4 can be vertically inserted into the two measuring grooves 33 to measure the outside of the traction pin 2.

[0026] Example 2:

[0027] This invention discloses an online measurement method for the heavy-duty traction pin of a GK-type diesel locomotive, which uses the online measurement device for the heavy-duty traction pin of a GK-type diesel locomotive described in Example 1. The specific steps are as follows:

[0028] S1. First, make the online measuring device for the heavy-duty traction pin of the GK type diesel locomotive 5 according to the specifications of the traction pin 2 of the GK type diesel locomotive 5 to be measured.

[0029] S2. After the disc 21 of the traction pin 2 is fixedly installed on the GK type diesel locomotive floor 1, the two magnetic seats 32 of the "U"-shaped measuring frame 3 of the GK type diesel locomotive heavy traction pin online measuring device are installed on the GK type diesel locomotive floor 1 on both sides of the traction pin 2.

[0030] S3. Select two circumferential positions on the top and bottom of the traction pin 2 as the first detection point 22 and the second detection point 23, respectively.

[0031] S4. Pass the measuring ruler 4 vertically through the two measuring slots 33 respectively, and measure the distances of the first detection point 22 and the second detection point 23 from the two sides of the frame body 31 respectively, and then calculate and judge the deviation of the traction pin 2 from the longitudinal center line of the main frame of the GK type diesel locomotive 5.

[0032] S5. Rotate the “U”-shaped measuring frame 3 around the circumference of the traction pin 2 to change the measuring position, and then measure the first detection point 22 and the second detection point 23 respectively according to step S4 and calculate and judge the deviation of the traction pin 2 from the longitudinal center line of the main frame of the GK type diesel locomotive 5.

[0033] S6. Based on the multiple measurements of the first detection point 22 and the second detection point 23, determine the deviation of the traction pin 2 from the longitudinal centerline of the main frame of the GK type diesel locomotive 5.

Claims

1. An online measuring device for heavy-duty traction pins of GK type diesel locomotives, wherein a disc (21) is provided at the rear of the traction pin (2), characterized in that: It includes a "U"-shaped measuring frame (3) and a measuring ruler (4); the "U"-shaped measuring frame (3) includes a "U"-shaped frame body (31), the inner height and width of the frame body (31) are greater than the height and width of the traction pin (2), and magnetic seats (32) with their outer end faces flush are respectively set at both ends of the frame body (31), and vertical measuring slots (33) are respectively opened on both sides of the frame body (31). The measuring ruler (4) is a horizontal ruler; The frame body (31) is made of square steel with a specification of 50×50mm.

2. A method for online measurement of heavy-duty traction pins of GK type diesel locomotives, characterized in that: The online measurement device for heavy-duty traction pins of GK type diesel locomotives as described in claim 1 is used, and the specific steps are as follows: S1. First, make the online measuring device for the heavy-duty traction pin of the GK type diesel locomotive (5) according to the specifications of the traction pin (2) of the GK type diesel locomotive (5) to be measured. S2. After the disc (21) of the traction pin (2) is fixedly installed on the bottom plate (1) of the GK type diesel locomotive, the two magnetic seats (32) of the "U"-shaped measuring frame (3) of the online measuring device for the heavy traction pin of the GK type diesel locomotive are installed on the bottom plate (1) of the GK type diesel locomotive on both sides of the traction pin (2). S3. Select two circumferential positions on the top and bottom of the traction pin (2) as the first detection point (22) and the second detection point (23). S4. Pass the measuring ruler (4) vertically through the two measuring slots (33) respectively, and measure the distances of the first detection point (22) and the second detection point (23) from the sides of the frame body (31) respectively, and then calculate and judge the deviation of the traction pin (2) from the longitudinal center line of the main frame of the GK type diesel locomotive (5). S5. Rotate the "U"-shaped measuring frame (3) around the traction pin (2) to change the measuring position, and then measure the first detection point (22) and the second detection point (23) respectively according to step S4 and calculate and judge the deviation of the traction pin (2) from the longitudinal center line of the main frame of the GK type diesel locomotive (5). S6. Based on the multiple measurements of the first detection point (22) and the second detection point (23), determine the deviation of the traction pin (2) from the longitudinal center line of the main frame of the GK type diesel locomotive (5).

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