Connecting rod pin detection tool

Abstract

The embodiment of the disclosure belongs to the field of rail vehicle detection equipment, and particularly relates to a connecting rod pin detection tool. The embodiment of the disclosure aims to solve the problem that the handheld probe is easy to separate from the surface of the connecting rod pin when the handheld probe is used to surround the connecting rod pin, thereby reducing the detection accuracy. The connecting rod pin detection tool of the embodiment of the disclosure comprises a body, the body surrounds a connecting hole, and the body has a gap penetrating the body in the axial direction of the connecting hole, and the connecting hole is used for sleeving the surface of the connecting rod pin; the body is further provided with a mounting hole, the mounting hole is used for placing the probe, and the mounting hole penetrates from the outer surface of the body to the connecting hole. The connecting rod pin detection tool provided by the disclosure can make the probe surround the connecting rod pin for detection without the handheld probe, avoid the problem that the probe is separated from the surface of the connecting rod pin due to the inconvenience of manual operation, avoid affecting the detection result, and thereby ensure the detection accuracy of the connecting rod pin.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure belongs to the field of rail vehicle detection equipment, and particularly relates to a connecting rod pin detection tool. BACKGROUND

[0002] The transmission system of an electric locomotive usually adopts a first-stage spur gear transmission, which comprises a traction motor, a driving gear, a driven gear, a hollow shaft, a connecting rod pin and a wheel set. The motor shaft of the traction motor is connected with the driving gear, the driven gear is engaged with the driving gear, the driven gear is connected with the hollow shaft through the connecting rod pin, and the wheel set is connected to the two ends of the hollow shaft. When the traction motor operates, the motor shaft drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and the driven gear drives the hollow shaft and the wheel set to rotate through the connecting rod pin, so that the wheel set can roll on the rail. Therefore, the connecting rod pin is a key component in the transmission system of the electric locomotive, and needs to be detected regularly to ensure the normal operation of the transmission system.

[0003] In the related art, an ultrasonic detection device is usually used to detect the connecting rod pin without disassembling the machine. During the detection process, the probe of the ultrasonic detection device needs to be held by hand, so that the probe is adsorbed to the surface of the connecting rod pin and moves around the connecting rod pin to detect the inside of the connecting rod pin.

[0004] However, in the related art, due to the narrow space between the driven gear and the hollow shaft, it is inconvenient to operate when the hand is inserted into the narrow space to move around the connecting rod pin, and the probe is easily separated from the surface of the connecting rod pin during the moving process, thereby affecting the detection result and reducing the detection accuracy. SUMMARY

[0005] Therefore, the embodiment of the present disclosure provides a connecting rod pin detection tool to solve the technical problem that the probe of the ultrasonic detection device is easily separated from the surface of the connecting rod pin during the detection process.

[0006] The embodiment of the present disclosure provides a connecting rod pin detection tool, which comprises a body, the body surrounds a connecting hole, and the body has an opening axially penetrating the connecting hole, the connecting hole is used for sleeving the surface of the connecting rod pin; the body is further provided with a mounting port, the mounting port is used for placing a probe, and the mounting port penetrates from the outer surface of the body to the connecting hole.

[0007] The connecting rod pin detection tool provided by the embodiment of the present disclosure, the body is sleeved outside the connecting rod pin through the connecting hole, the body is provided with a mounting port penetrating from the outer surface of the body to the connecting hole, the probe is placed in the mounting port and is adsorbed to the surface of the connecting rod pin. In the process of detecting the connecting rod pin, the body can be manually rotated, and the body can rotate relative to the connecting rod pin around the axis of the connecting rod pin; in the process of rotating the body, the mounting port pushes the probe to move around the connecting rod pin to detect the connecting rod pin. The connecting rod pin detection tool provided by the embodiment of the present disclosure can make the probe detect around the connecting rod pin without holding the probe during the detection process, avoid the problem that the probe is separated from the surface of the connecting rod pin due to the inconvenient manual operation caused by the narrow space, cause the missed detection of the connecting rod pin, prevent the detection result from being affected, and thus ensure the detection accuracy of detecting the connecting rod pin. Meanwhile, the connecting rod pin detection tool provided by the embodiment of the present disclosure can also improve the working efficiency of detecting the connecting rod pin and reduce the labor intensity.

[0008] In some embodiments that can include the above-mentioned embodiments, the mounting port has a plurality of mounting ports, and the plurality of mounting ports are arranged along the axis of the connecting hole.

[0009] In some embodiments that can include the above-mentioned embodiments, the widths of different two mounting ports along the circumference of the connecting hole are different; and / or, the lengths of different two mounting ports along the axis of the connecting hole are different.

[0010] In some embodiments that can include the above-mentioned embodiments, among the plurality of mounting ports, at least one mounting port penetrates to one end of the body facing the driven gear.

[0011] In some embodiments that can include the above-mentioned embodiments, among the plurality of mounting ports, at least one mounting port penetrates to one end of the body away from the driven gear.

[0012] In some embodiments that can include the above-mentioned embodiments, the hole wall of the connecting hole is used to abut the tapered section of the connecting rod pin.

[0013] In some embodiments that can include the above-mentioned embodiments, the thickness of the body along the axis perpendicular to the connecting hole is equal everywhere.

[0014] In some embodiments that can include the above-mentioned embodiments, the body is an elastic body.

[0015] In some embodiments that can include the above-mentioned embodiments, the body is plastic.

[0016] In some embodiments that can include the above-mentioned embodiments, one end of the body along the axis of the connecting hole is used to abut the driven gear, and the other end of the body along the axis of the connecting hole is used to abut the hollow shaft. BRIEF DESCRIPTION OF DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. It is obvious that the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram showing the connection between the connecting pin, hollow shaft, and driven gear in the transmission system of an electric locomotive.

[0019] Figure 2 for Figure 1 Schematic diagram of the middle connecting rod pin;

[0020] Figure 3 This is a schematic diagram showing the connection between the probe and the connecting rod pin when testing the connecting rod pin.

[0021] Figure 4 This is a front view of the connecting pin inspection fixture according to an embodiment of this disclosure;

[0022] Figure 5 for Figure 4 Side view of the connecting rod pin inspection fixture;

[0023] Figure 6 This is a side view of a connecting pin detection fixture in other implementations of the embodiments of this disclosure;

[0024] Figure 7 This is a schematic diagram showing the connection between the connecting rod pin detection fixture and the connecting rod pin according to an embodiment of this disclosure.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10-Ontology;

[0027] 11-Connecting hole;

[0028] 12-Gap;

[0029] 13-Outer surface;

[0030] 14 - Mounting port;

[0031] 20-Connecting pin;

[0032] 21-inner hole;

[0033] 22-Cone-shaped segment;

[0034] 23-First connecting segment;

[0035] 24-Second connecting segment;

[0036] 25-Arc;

[0037] 30 - driven gear;

[0038] 40 - transmission disc;

[0039] 50 - probe. DETAILED DESCRIPTION

[0040] To make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some but not all of the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present disclosure.

[0041] Firstly, those skilled in the art should understand that the embodiments are only used for explaining the technical principles of the present disclosure, and are not intended to limit the protection scope of the present disclosure. Those skilled in the art can make adjustments according to the needs in order to adapt to specific application occasions.

[0042] Secondly, it should be noted that, in the description of the embodiments of the present disclosure, the terms indicating the direction or position relationship such as "inner", "outer" and the like are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or member must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0043] In addition, it should be noted that, in the description of the embodiments of the present disclosure, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two members. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present disclosure according to the specific circumstances.

[0044] In the related art, the transmission system of an electric locomotive generally adopts a one-stage spur gear transmission. The transmission system of an electric locomotive generally includes a traction motor, a driving gear, a driven gear, a hollow shaft, a connecting rod pin and a wheel set. The motor shaft of the traction motor is connected with the driving gear, the driven gear is engaged with the driving gear, the driven gear is connected with the hollow shaft through the connecting rod pin, and the wheel set is connected to both ends of the hollow shaft. Referring to Figure 1One end of the connecting rod pin 20 is connected with the driven gear 30, and the other end of the connecting rod pin 20 is connected with the transmission disc 40 on the hollow shaft. When the traction motor operates, the motor shaft of the traction motor drives the driving gear to rotate, the driving gear drives the driven gear 30 to rotate, the driven gear 30 drives the transmission disc 40 to rotate through the connecting rod pin 20, and the transmission disc 40 further drives the hollow shaft and the wheel pairs at both ends of the hollow shaft to rotate, so that the wheel pairs can roll on the steel rail, thereby driving the rail vehicle to run.

[0045] Reference Figure 2 The connecting rod pin 20 is in a cylindrical shape, and the connecting rod pin 20 is provided with an inner hole 21 penetrating through the connecting rod pin 20 along the central axis of the connecting rod pin 20. The connecting rod pin 20 has a tapered section 22, a first connecting section 23 and a second connecting section 24, the first connecting section 23 is located at one end of the tapered section 22, the second connecting section 24 is located at the other end of the tapered section 22, and the first connecting section 23, the tapered section 22 and the second connecting section 24 are sequentially connected. There are circular arcs 25 between the first connecting section 23 and the tapered section 22, and between the second connecting section 24 and the tapered section 22. The first connecting section 23 is used to connect with the driven gear 30, and the second connecting section 24 is used to connect with the transmission disc 40.

[0046] In the working process of the transmission system of the electric locomotive, the connecting rod pin 20 bears the shearing force between the driven gear 30 and the transmission disc 40. As the running mileage of the rail vehicle increases, the connecting rod pin 20 is prone to breakage, thereby causing the transmission system of the electric locomotive to fail to work, and easily causing a safety accident of the rail vehicle.

[0047] The fracture of the connecting rod pin that has occurred is analyzed, and there are obvious shell-like textures and instantaneous brittle fracture zones on the fracture surface, which belongs to typical fatigue fracture. The fatigue source is located at the circular arc 25 of the connecting rod pin 20. Due to the machining process and / or assembly process of the connecting rod pin 20, cracks will be generated at the circular arc 25 of the connecting rod pin 20. In the running process of the rail vehicle, the cracks generated at the circular arc 25 will gradually expand, thereby causing the breakage of the connecting rod pin 20.

[0048] Therefore, for the connecting rod pin 20 that has been assembled to the transmission system of the electric locomotive, i.e. the connecting rod pin 20 that has been assembled to the rail vehicle, it is necessary to regularly perform flaw detection on the connecting rod pin 20 to determine the crack condition in the connecting rod pin 20, so as to timely replace the connecting rod pin 20, ensure the normal work of the transmission system of the electric locomotive, and prevent safety accidents of the rail vehicle.

[0049] In the related art, the detection method of ultrasonic flaw detection is usually used to regularly perform flaw detection on the connecting rod pin 20 that has been assembled to the rail vehicle without disassembling the electric locomotive.

[0050] Reference Figure 3In the process of detecting the connecting rod pin 20 by using the ultrasonic detection method, the probe 50 needs to be held by hand to adhere to the surface of the connecting rod pin 20, at this time the probe 50 emits ultrasonic waves to the connecting rod pin 20, and the cracks in the connecting rod pin 20 are detected by acquiring the ultrasonic waves returned by the connecting rod pin 20; in the detection process, the probe 50 is held by hand and moved around the connecting rod pin 20 to detect the entire inside of the connecting rod pin 20. However, due to the narrow space between the driven gear 30 and the transmission disc 40, it is inconvenient to operate when the hand is inserted into the narrow space to move around the connecting rod pin 20, and the probe 50 is easily separated from the surface of the connecting rod pin 20 during the moving process, which causes missed detection of the connecting rod pin 20, thereby affecting the detection result and reducing the detection accuracy.

[0051] To solve the above technical problems, the present embodiment provides a connecting rod pin detection tool, which is sleeved on the connecting rod pin 20 and can rotate around the axis of the connecting rod pin 20. During rotation, the detection tool can push the probe 50 to move and guide the probe 50 to move around the axis of the connecting rod pin, thereby detecting the connecting rod pin 20. The probe 50 can move around the connecting rod pin 20 without being held by hand, which avoids the problem of the probe 50 being separated from the surface of the connecting rod pin 20 due to the narrow space and inconvenient hand operation, avoids missed detection of the connecting rod pin 20, prevents the detection result from being affected, and thus ensures the detection accuracy of the connecting rod pin 20.

[0052] Reference Figure 4 and Figure 5 The present embodiment provides a connecting rod pin detection tool, which includes a body 10. The body 10 surrounds a connecting hole 11, and has a gap 12 axially penetrating the body 10 along the connecting hole 11. The connecting hole 11 is used to be sleeved on the surface of the connecting rod pin 20. The body 10 is also provided with a mounting hole 14 for placing the probe 50. The mounting hole 14 penetrates from the outer surface 13 of the body 10 to the connecting hole 11.

[0053] For example, reference Figure 4 and Figure 5The body 10 is provided with a connecting hole 11 penetrating the body 10. The body 10 is also provided with a slit 12 penetrating the body 10 along the axial direction of the connecting hole 11 and penetrating the sidewall of the body 10 along the radial direction of the connecting hole 11. In use, the width of the slit 12 is increased by elastically deforming the body 10, and then the connecting rod pin 20 is put into the connecting hole 11 from the slit 12, so that the body 10 is sleeved on the connecting rod pin 20. After the body is sleeved on the connecting rod pin 20, the body 10 is released, and the width of the slit 12 is reduced to prevent the connecting rod pin 20 from falling off from the slit 12. The body 10 is rotationally connected with the connecting rod pin 20 through the connecting hole 11, that is, the body 10 can rotate relative to the connecting rod pin 20 around the axis of the connecting rod pin 20.

[0054] The body 10 can be a rotary body, for example, a circular truncated cone. The body 10 can also be a non-rotary body. The shape of the body 10 is not specifically limited in the embodiments of the present disclosure. For example, the thickness of the body 10 along the direction perpendicular to the axial direction of the connecting hole 11 is equal everywhere, so as to facilitate the rotation of the body 10.

[0055] In some implementations of the embodiments of the present disclosure, the body 10 can be an elastic body. In this way, the installation and disassembly of the body 10 are facilitated. When the connecting hole 11 is sleeved on the surface of the connecting rod pin 20 through the slit 12, the two side edges of the slit 12 are pulled away from each other, so that the body 10 is deformed and the width of the slit 12 along the direction perpendicular to the axial direction of the connecting hole 11 is increased. The connecting rod pin 20 enters the connecting hole 11 from the slit 12 with the increased width. Then the pulling force on the two side edges of the slit 12 is removed, the shape of the body 10 is restored, the width of the slit 12 is restored, and the connecting hole 11 is sleeved on the connecting rod pin 20.

[0056] In this way, the width of the slit 12 along the direction perpendicular to the axial direction of the connecting hole 11 is reduced, the contact area between the connecting hole 11 and the connecting rod pin 20 is increased, the disconnection between the body 10 and the connecting rod pin 20 is prevented, the stability of the rotation of the body 10 relative to the connecting rod pin 20 is improved, the body 10 can further push the probe 50 to move stably, and the detection accuracy is improved. For example, the material of the body 10 can be plastic, and the material of the body 10 can also be brass, etc.

[0057] The size of the width of the slit 12 along the direction perpendicular to the axial direction of the connecting hole 11 is not specifically limited in the embodiments of the present disclosure, as long as the body 10 can be sleeved on the connecting rod pin 20 through the slit 12 and the body 10 can be prevented from falling off from the connecting rod pin 20 after the elastic deformation of the body 10 is restored. For example, the width of the slit 12 on the cross section perpendicular to the axial direction of the connecting hole 11 can be equal to the diameter of the body 10 on the cross section, so that the body 10 is formed in a semi-circular truncated cone shape as shown in Figure 6 Figure 6 the body 10 is formed in a semi-circular truncated cone shape as shown in​

[0058] In some implementations of the embodiments of the present disclosure, the hole wall of the connecting hole 11 is in contact with the surface of the connecting rod pin 20 to increase the contact area between the connecting hole 11 and the surface of the connecting rod pin 20, so as to improve the stability of the rotation of the body 10 relative to the connecting rod pin 20, so that the body 10 can push the probe 50 to move stably, thereby improving the detection accuracy. Exemplarily, the hole wall of the connecting hole 11 is in contact with the tapered section 22 of the connecting rod pin 20. That is, the surface of the tapered section 22 of the connecting rod pin 20 is a tapered surface, and correspondingly, the hole wall of the connecting hole 11 is also a tapered surface, so that the hole wall of the connecting hole 11 can be in contact with the surface of the connecting rod pin 20.

[0059] In other embodiments of the present disclosure, one end of the body 10 in the axial direction of the connecting hole 11 is used to abut against the driven gear 30, and the other end of the body 10 in the axial direction of the connecting hole 11 is used to abut against the transmission disc 40 of the hollow shaft. The driven gear 30 and the transmission disc 40 can limit the body 10 in the axial direction of the connecting hole 11, so as to prevent the body 10 from moving in the axial direction of the connecting hole 11 during the rotation relative to the connecting rod pin 20, so that the position of the probe 50 is deviated, thereby affecting the measurement accuracy.

[0060] With reference to Figure 4 and Figure 5 , the body 10 is provided with a mounting port 14 which is penetrated by the outer surface 13 of the body 10 to the connecting hole 11. The probe 50 is placed in the mounting port 14 and is adsorbed to the surface of the connecting rod pin 20. During the rotation of the body 10, the edge of the mounting port 14 abuts against the probe 50 to push the probe 50 to move around the connecting rod pin 20 for detection.

[0061] With reference to Figure 7 , the connecting rod pin detection tool of the embodiments of the present disclosure, the body 10 is sleeved on the surface of the connecting rod pin 20 through the connecting hole 11, the body 10 is provided with a mounting port 14 which is penetrated by the outer surface 13 of the body 10 to the connecting hole 11, and the probe 50 is placed in the mounting port 14 and is adsorbed to the surface of the connecting rod pin 20. During the detection of the connecting rod pin 20, the body 10 can be manually rotated to rotate relative to the connecting rod pin 20 around the axis of the connecting rod pin 20. During the rotation of the body 10, the mounting port 14 pushes the probe 50 to move around the connecting rod pin 20 for detection of the connecting rod pin 20.

[0062] The connecting rod pin detection tool provided by the embodiment of the present disclosure can push the probe 50 to move when the body 10 rotates during the detection of the connecting rod pin 20, so as to guide the probe 50 and enable the probe 50 to detect the connecting rod pin 20 in a surrounding manner. The probe 50 does not need to be held by hand, which avoids the problem that the probe 50 is separated from the surface of the connecting rod pin 20 due to the inconvenience of manual operation caused by a narrow space, avoids missing detection, prevents the detection result from being affected, and thus ensures the detection accuracy of the detection of the connecting rod pin 20. Meanwhile, the connecting rod pin detection tool of the embodiment of the present disclosure can also improve the work efficiency of the detection of the connecting rod pin 20 and reduce the labor intensity.

[0063] Reference Figure 4 And Figure 5 For example, the mounting port 14 has a plurality of mounting ports 14, and the plurality of mounting ports 14 are arranged along the axis of the connecting hole 11. The probe 50 can be placed in any one of the mounting ports 14 to push the probe 50 to surround the connecting rod pin 20 along different paths, thereby improving the detection range of the detection of the connecting rod pin 20.

[0064] For example, the widths of the different two mounting ports 14 along the circumferential direction of the connecting hole 11 are different; and / or, the lengths of the different two mounting ports 14 along the axial direction of the connecting hole 11 are different. That is, the sizes of the different two mounting ports 14 can be different to install the probes 50 of different sizes, thereby improving the applicability of the connecting rod pin detection tool of the embodiment of the present disclosure.

[0065] The shape of the mounting port 14 is not specifically limited in the embodiment of the present disclosure. For example, in the plurality of mounting ports 14, the shape of at least one mounting port 14 can be rectangular. When the mounting port 14 is rectangular and the mounting port 14 is arranged along the axial direction of the connecting hole 11, when the body 10 rotates, the first edge of the mounting port 14 parallel to the axial direction of the connecting hole 11 pushes the probe 50 to move around the connecting rod pin 20 to perform detection; when the body 10 reversely rotates, the second edge of the mounting port 14 parallel to the first edge pushes the probe 50 to reversely move around the connecting rod pin 20 to perform reverse detection.

[0066] In the above example, when the mounting port 14 is rectangular and the probe 50 is located in the mounting port 14, the third edge and the fourth edge of the mounting port 14 perpendicular to the first edge and the second edge can abut against the probe 50 to limit the probe 50 along the axial direction of the connecting hole 11, so as to prevent the body 10 from moving along the axial direction of the connecting hole 11 during the rotation relative to the connecting rod pin 20, thereby causing the position of the probe 50 to deviate and further affecting the measurement accuracy.

[0067] In some implementations, at least one of the plurality of mounting holes 14 extends through the body 10 to an end of the body 10 that is closer to the driven gear 30, enabling the probe 50 to be positioned close to the driven gear 30 to detect an area of the connecting rod pin 20 that is closer to the driven gear 30, such as to enable the probe 50 to detect an area near the circular arc 25 between the first connecting section 23 and the tapered section 22 of the connecting rod pin 20, thereby increasing the detection range.

[0068] In other implementations, at least one of the plurality of mounting holes 14 extends through the body 10 to an end of the body 10 that is further from the driven gear 30, enabling the probe 50 to be positioned close to the hollow shaft to detect an area of the connecting rod pin 20 that is closer to the hollow shaft drive plate 40, such as to enable the probe 50 to detect an area near the circular arc 25 between the second connecting section 24 and the tapered section 22 of the connecting rod pin 20, thereby increasing the detection range.

[0069] Finally, it should be noted that the above-described embodiments are merely used to illustrate the technical solutions of the present disclosure, rather than limit the present disclosure; even though the present disclosure has been described in detail with reference to the above-described embodiments, those of ordinary skill in the art should understand that modifications can still be made to the technical solutions described in the above-described embodiments, or some or all of the technical features thereof can be replaced equivalently; and these modifications or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A connecting rod bolt inspection tool characterized by, The body is provided with a through hole for sleeving the surface of a connecting rod pin, and the hole wall of the through hole is used for abutting against the tapered section of the connecting rod pin; the body is further provided with a mounting hole for placing a probe, and the mounting hole is penetrated through from the outer surface of the body to the through hole; One end of the body along the axial direction of the through hole is used for abutting against a driven gear, and the other end of the body along the axial direction of the through hole is used for abutting against a hollow shaft; The mounting hole is penetrated through to one end of the body facing the driven gear, or the mounting hole is penetrated through to the other end of the body away from the driven gear.

2. The connecting rod bolt inspection tool of claim 1, wherein, The mounting holes are arranged at intervals along the axial line of the through hole.

3. The connecting rod bolt inspection tool of claim 2, wherein, The widths of different two mounting holes along the circumferential direction of the through hole are different; and / or the lengths of different two mounting holes along the axial direction of the through hole are different.

4. The connecting rod bolt inspection tool of any of claims 1-3, wherein, The thickness of the body along the axial direction of the through hole is equal everywhere.

5. The connecting rod bolt inspection tool of any of claims 1-3, wherein, The body is made of plastic.

Images