A device for measuring the bearing clearance of a bearing box of a direct current electric locomotive

Abstract

The application discloses a kind of DC electric locomotive axle-holding box bearing play measuring device, the distance between detection plate is measured by laser ranging module in the application, when detection plate moves along with axle-holding box, distance changes, accurate moving distance can be obtained according to trigonometric function, detection plate is installed on axle-holding box, and force mechanism limits laser ranging module to keep vertical irradiation ranging, accurate play value can be obtained, reduce the loosening of card seat or personnel subjective factors, cause 100% position inaccuracy, and further cause the error of measurement result exists;Adjusting assembly is set, different rod body of cross adjusting piece is contacted with the bottom end of detection plate, detection plate is swung in first L-shaped groove, different first included angle is formed, multiple data can be measured at a time, avoid inaccurate single measurement due to various interference matters, ensure the accuracy of data measurement acquisition.

Description

Technical Field

[0001] This invention relates to the field of bearing clearance measurement technology, and in particular to a device for measuring the clearance of axle box bearings in DC electric locomotives. Background Technology

[0002] The axle clamping mechanism is a key component of electric locomotives, mainly consisting of the axle body, axle clamping box, bearings, and auxiliary wheels. The axial clearance of the axle clamping box bearing is a crucial factor in ensuring its service life. The common measurement method for existing SS4B electric locomotives is to first install a dial indicator using a clamping mount, then place the dial indicator's contact against the end of the axle body. Next, a pry bar is used to move the axle clamping box axially left and right, recording the difference in axial movement on the dial indicator; this is the axle clamping box bearing clearance. During the measurement process, it is essential to ensure that the dial indicator itself does not move to obtain accurate values. Generally, the clamping mount is a multi-axis rotating mechanism, equivalent to a non-powered multi-axis robotic arm, which clamps the dial indicator at its end.

[0003] However, since the bearing clamping mechanism cannot accurately position itself during each hoisting and transport, it is necessary to adjust the multi-axis rotation mechanism of the clamp to ensure that the dial indicator is axially pressed against the end of the shaft. This method may result in inaccurate positioning due to loose clamp or subjective factors of personnel, leading to errors in the measurement results. Therefore, a bearing clearance measuring device for electric locomotive axle clamping boxes is designed to solve the above problems. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a device for measuring the clearance of axle box bearings in DC electric locomotives.

[0005] This invention provides a device for measuring bearing clearance in a DC electric locomotive axle box, mounted on an axle clamping mechanism. The axle clamping mechanism includes an axle box for mounting the axle and auxiliary wheels mounted at both ends of the axle box via bearings. The device is characterized in that a laser detection mechanism is mounted on the axle clamping mechanism, and the laser detection mechanism includes:

[0006] The center rod is connected to the auxiliary wheel at its first end, and the direction of its axis extension is the same as the direction of the axle box extension.

[0007] The laser assembly includes an L-shaped mounting plate located above and connected to the axle box, a detection plate mounted on the L-shaped mounting plate, and a first included angle between the detection plate and the bottom plane of the L-shaped mounting plate. The laser assembly also includes a laser ranging module located at the tail end of the center rod and corresponding to the position of the detection plate. The laser ranging module is used to measure the distance between the laser ranging module and the detection plate.

[0008] An adjustment component, mounted on an L-shaped mounting plate, is used to adjust the size of the first included angle;

[0009] The force-applying mechanism, located in the middle of the central rod, is used to limit the laser from the laser ranging module from being emitted directly downwards.

[0010] According to the technical solution provided in the embodiments of this application, the adjustment component includes:

[0011] The limiting part includes a first L-shaped groove on the inner surface of an L-shaped mounting plate, and a second L-shaped groove on both ends of the L-shaped mounting plate along a second direction. The top of the detection plate is provided with limiting sliding posts that move along the vertical part of the second L-shaped groove on both ends of the second direction, and the bottom of the detection plate is provided with limiting sliding posts that move along the horizontal part of the second L-shaped groove on both ends of the second direction. The second direction is perpendicular to the first direction.

[0012] The adjustment unit includes an adjustment window located at the end of the first L-shaped groove. A cross-shaped adjustment component is rotatably mounted inside the adjustment window via a fixed shaft. The lengths of the rods of the cross-shaped adjustment component are not equal. The adjustment unit also includes a positioning structure, which is used to limit the cross-shaped adjustment component from rotating on its own when not in operation.

[0013] According to the technical solution provided in the embodiments of this application, the force-applying mechanism is also used to push the axle box to move along the first direction with the auxiliary wheel as a fixed member.

[0014] According to the technical solution provided in the embodiments of this application, the force-applying mechanism includes:

[0015] The force-applying component includes two mounting cylinders mounted on a central rod. A top-pressing screw is threadedly connected to the top of the two mounting cylinders. An inclined support plate is provided at the bottom of each of the two mounting cylinders. A first support cylinder is connected between the bottom ends of the two support plates. The axial direction of the first support cylinder is the second direction.

[0016] The force-bearing component includes a lever plate between two mounting cylinders. The top of the lever plate has a force-bearing area corresponding to the top pressure screw. The bottom of the lever plate is provided with a clearance groove larger than the diameter of the central rod and the outer diameter of the first support cylinder. Two second support cylinders are provided at the bottom end on both sides of the first support cylinder along the second direction. A support shaft is installed between the second support cylinder and the first support cylinder. The bottom of the two second support cylinders is connected to the axle box.

[0017] According to the technical solution provided in the embodiments of this application, the top of the mounting cylinder is provided with a U-shaped frame, and the two top-pressing screws are threadedly installed on the vertical part of the frame.

[0018] According to the technical solution provided in the embodiments of this application, the force-bearing component further includes two half beams disposed at the bottom end of the second support cylinder. The bottom ends of the two half beams are provided with second limiting rings. The bottom ends of the second limiting rings are provided with limiting pins for fitting into the screw holes of the housing. The bottom ends of the limiting pins are provided with second studs extending out of the screw holes of the housing. The bottom end of the second studs is connected to a second nut by threads.

[0019] According to the technical solution provided in the embodiments of this application, the laser detection mechanism further includes a fixing component, the fixing component comprising:

[0020] The first fork beam is arranged in a U-shape above the axle box. The top end is equipped with the L-shaped mounting plate, and both ends of the bottom are provided with first limiting rings. The bottom end of the first limiting ring is provided with a limiting plug, which is inserted into the screw hole of the box.

[0021] The lower limit part is connected to the limit plug and is used to limit the limit plug to move upward in the vertical direction.

[0022] According to the technical solution provided in the embodiments of this application, the limiting plug is a first positioning plug, and the lower limiting part includes a first stud disposed at the bottom end of the first positioning plug, and a first nut is threadedly connected to the bottom of the first stud.

[0023] According to the technical solution provided in the embodiments of this application, the limiting plug is a first magnet, the lower limiting part includes a second fork beam located below the bearing box and in the shape of a U, the top of the second fork beam is provided with a second magnet inserted into the screw hole of the box body, and the close ends of the first magnet and the second magnet are opposite magnetic poles.

[0024] According to the technical solution provided in the embodiments of this application, the first end of the central rod has an external thread and passes through the spoke hole of the secondary wheel. The central rod is slidably fitted with pressure plates on both sides of the secondary wheel along the first direction. Both pressure plates are provided with clamping nuts threadedly connected to the external thread on both sides along the first direction. The outer diameter of the clamping nut is larger than the diameter of the central hole of the pressure plate, and the inner diameter of the spoke hole is smaller than the outer diameter of the pressure plate.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention measures the distance between the detection plate and the laser ranging module. As the detection plate moves with the bearing box, the distance changes. The accurate moving distance can be obtained using trigonometric functions. The detection plate is mounted on the bearing box, and a force-applying mechanism restricts the laser ranging module to maintain vertical illumination for ranging, thus obtaining accurate clearance values. This reduces the possibility of inaccurate positioning due to loose mounting or subjective factors, which could lead to measurement errors. Furthermore, after long-term use, issues such as wear on the detection plate surface, damage to the fixing components causing plate tilting, or stains on the detection plate surface may occur. An adjustment component is provided, where different rods of the cross-shaped adjustment piece contact the bottom of the detection plate, pushing it to swing within the first L-shaped groove to form different first included angles. This allows for multiple data measurements at once, avoiding inaccuracies in single measurements due to various interferences and ensuring the accuracy of data acquisition.

[0027] In addition, the force-applying mechanism not only restricts the laser ranging module but also applies stress. By rotating the top-pressure screw, the screw pushes the force-bearing area of ​​the lever plate under the action of the thread. This causes the half-beam to deflect around the mounting shaft, thereby moving the axle box axially. This force-applying method allows for the measurement of the axle box clearance value when the wheelset is placed horizontally without disassembling the wheel center, reducing the workload of disassembly. Furthermore, it utilizes the lever principle, measuring the axle box clearance value by a fixed torque value. The measured value is the true clearance value. Compared to using a traditional pry bar to move the axle box, this method is more stable and solves the problem of deviations in clearance values ​​caused by different amounts of force applied by the measuring personnel or different amounts of grease filling.

[0028] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0029] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 A schematic diagram of the structure of a DC electric locomotive axle box bearing clearance measuring device provided in this application embodiment;

[0031] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0032] Figure 3 This is a schematic diagram of the mounting structure of the first nut in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the installation structure of the second fork beam in an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the installation structure of the detection board in an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the installation structure of the cross-shaped adjustment component in an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the installation structure of the force-applying component in an embodiment of this application;

[0037] Figure 8 This is a schematic diagram of the structure of the force-bearing component in an embodiment of this application;

[0038] Figure 9 This is a measurement schematic diagram of the laser ranging module in an embodiment of this application.

[0039] Numbering on the map:

[0040] 1. Shaft clamping mechanism; 11. Shaft clamping box; 12. Box screw hole; 13. Bearing; 14. Auxiliary wheel; 15. Spoke hole; 2. Center rod;

[0041] 3. Laser detection mechanism; 31. Mounting box; 32. Light transmission hole; 33. Laser ranging module; 34. L-shaped mounting plate; 35. Detection plate;

[0042] 4. Fixing assembly; 41. First fork beam; 42. First limiting retaining ring; 43. First positioning pin; 44. First stud; 45. First nut; 46. First magnet; 47. Second fork beam; 48. Second magnet;

[0043] 5. Adjustment assembly; 51. First L-shaped groove; 52. Second L-shaped groove; 53. Limiting slide column; 54. Adjustment window; 55. Fixed shaft; 56. Cross adjustment component; 561. First rod; 562. Second rod; 563. Third rod; 57. Positioning rubber block; 58. Positioning groove;

[0044] 6. Force-applying mechanism; 61. Pressure plate; 62. Compression nut; 63. External thread;

[0045] 7. Force-applying component; 71. Mounting cylinder; 72. Side plate; 73. Top cover plate; 74. Top pressure screw; 75. Support plate; 76. First support cylinder;

[0046] 8. Force-bearing component; 81. Lever plate; 82. Force-bearing area; 83. Clearance groove; 84. Second support cylinder; 85. Support shaft; 86. Half beam; 87. Second limit retaining ring; 88. Limiting insert; 89. Second stud; 810. Second nut. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] Please refer to Figures 1-9 An embodiment of the present invention provides a DC electric locomotive axle box bearing clearance measuring device, which is mounted on an axle clamping mechanism 1. The axle clamping mechanism 1 includes an axle clamping box 11 for mounting the axle body, and auxiliary wheels 14 mounted at both ends of the axle clamping box 11 via bearings 13. A laser detection mechanism 3 is mounted on the axle clamping mechanism 1. The laser detection mechanism 3 includes:

[0050] The center rod 2, with its first end connected to the auxiliary wheel 14, has its axis extending in the same direction as the axle box 11, which is a first direction; the first direction is... Figure 1 The left and right directions in the middle;

[0051] The laser assembly includes an L-shaped mounting plate 34 located above and connected to the axle box 11. A detection plate 35 is mounted on the L-shaped mounting plate 34. The detection plate 35 and the bottom plane of the L-shaped mounting plate 34 have a first included angle. The laser assembly also includes a laser ranging module 33 located at the tail end of the central rod 2 and corresponding to the position of the detection plate 35. The laser ranging module 33 is used to measure the distance between the laser ranging module 33 and the detection plate 35.

[0052] Adjustment component 5, located on L-shaped mounting plate 34, is used to adjust the size of the first included angle;

[0053] The force-applying mechanism 6 is located in the middle of the central rod 2 and is used to limit the laser of the laser ranging module 33 from being emitted directly downwards.

[0054] When performing measurements, refer to Figure 9 The first included angle is X. In the initial state, the initial distance between the laser ranging module 33 and the detection plate 35 is H. When the drive bearing housing 11 moves to the left, the detection plate 35 mounted on the bearing housing 11 moves to the left synchronously, with a moving distance of m. m is the bearing clearance parameter. At this time, the distance parameter measured by the laser ranging module 33 becomes S1, S1=H+h1, according to the tangent function formula as follows:

[0055]

[0056] therefore This allows us to obtain the bearing clearance parameter m. When the detection plate 35 moves to the right, the measured spacing parameter becomes S2, where S2 = H - h2. Replacing h1 with h2 in the tangent function, then... .

[0057] The laser ranging module 33 can be a common laser rangefinder. It emits a laser through its front-end laser emitter, and then the internal circuit board calculates the corresponding distance parameters. The user can calculate the bearing clearance value through the distance parameters. Optionally, the display screen of the laser ranging module 33 in this application is located at the top, while the laser emitter is located at the bottom, which is convenient for the user to view. More preferably, a processing unit can be added to the circuit board, which can directly calculate the bearing clearance parameters based on the ranging parameters. The specific way to add the unit is to write a program into the chip. This method is existing technology and will not be described in detail here.

[0058] Optionally, a mounting box 31 is installed at the tail end of the center rod 2, and the laser ranging module 33 is installed inside the mounting box 31. The bottom end of the mounting box 31 has a light-transmitting hole 32 corresponding to the laser emitting element, and the top end of the mounting box 31 has a first opening. The display screen area is larger than the first opening, making it convenient for users to view the display screen and take out the laser ranging module 33.

[0059] This invention measures the distance between the laser ranging module 33 and the detection plate 35. When the detection plate 35 moves with the bearing box 11, the distance changes. The accurate moving distance can be obtained according to the tangent function. The detection plate 35 is installed on the bearing box 11, and the force application mechanism 6 restricts the laser ranging module 33 to maintain vertical illumination for ranging, which can obtain accurate clearance values ​​and reduce the possibility of inaccurate positioning due to loose mounting or subjective factors of personnel, thus causing errors in the measurement results. Furthermore, after long-term use, interference such as surface wear, tilting, or stains on the detection plate 35 may occur. An adjustment component 5 is set to form different first included angles X, which can measure multiple sets of data at once, avoiding inaccurate single measurements due to various interferences and ensuring the accuracy of data measurement.

[0060] In some embodiments, the regulating component 5 includes:

[0061] The limiting part includes a first L-shaped groove 51 on the inner surface of the L-shaped mounting plate 34, and second L-shaped grooves 52 on both ends of the L-shaped mounting plate 34 along the second direction. The top of the detection plate 35 has limiting sliding posts 53 on both ends of the second direction, which move vertically along the second L-shaped grooves 52. The bottom of the detection plate 35 has limiting sliding posts 53 on both ends of the second direction, which move horizontally along the second L-shaped grooves 52. The second direction is perpendicular to the first direction. Figure 1 The front and back directions in the middle;

[0062] The adjustment unit includes an adjustment window 54 located at the end of the first L-shaped groove 51. A cross adjustment member 56 is rotatably mounted inside the adjustment window 54 via a fixed shaft 55. The lengths of the rods of the cross adjustment member 56 are not equal. The adjustment unit also includes a positioning structure, which is used to limit the cross adjustment member 56 from rotating on its own when there is no operation.

[0063] like Figure 5 and Figure 6 As shown, pushing one of the rods of the cross-shaped adjustment member 56 can cause the cross-shaped adjustment member 56 to rotate around the fixed shaft 55. After rotation, it is limited and fixed by the positioning structure to ensure the stability of the cross-shaped adjustment member 56. When one of the rods of the cross-shaped adjustment member 56 contacts the bottom of the detection plate 35, the limiting slide post 53 at the bottom of the detection plate 35 moves along the horizontal part of the second L-shaped groove 52, while the limiting slide post 53 at the top of the detection plate 35 moves along the vertical part of the second L-shaped groove 52, so as to realize the purpose of changing the tilt angle of the detection plate 35.

[0064] refer to Figure 6 The cross-shaped adjustment member 56 may include a first rod 561, a second rod 562, and a third rod 563, the lengths of which are shortened in sequence. Optionally, when the first rod 561 contacts the bottom end of the detection plate 35, the first included angle between the bottom of the detection plate 35 and the horizontal plane is 60 degrees; when the second rod 562 contacts the bottom end of the detection plate 35, the first included angle between the bottom of the detection plate 35 and the horizontal plane is 45 degrees; and when the third rod 563 contacts the bottom end of the detection plate 35, the first included angle between the detection plate 35 and the horizontal plane is 30 degrees. By using specific rod lengths, the detection plate 35 is at a specific angle, which facilitates the accuracy of conversion. If the laser ranging module 33 is damaged, a laser rangefinder can also be purchased and installed inside the mounting box 31, making it convenient for users to perform calculations themselves and improving the ease of use of the device.

[0065] In some embodiments, the positioning structure includes positioning grooves 58 on the top and bottom surfaces of the ends of each rod near the fixed shaft 55, and positioning rubber blocks 57 that fit into the positioning grooves 58 are provided on the top and bottom surfaces inside the adjustment window 54.

[0066] like Figure 6 As shown, whenever the cross adjustment member 56 is rotated to the appropriate position, the positioning rubber block 57 can be inserted into the corresponding positioning groove 58. Since the stress of the detection plate 35 on the cross adjustment member 56 is the stress in the left and right direction, the stability of the cross adjustment member 56 can be ensured when there is no force in the front and back direction, thus preventing the detection plate 35 from sliding.

[0067] In some embodiments, the force-applying mechanism 6 is also used to push the axle box 11 to move along a first direction with the auxiliary wheel 14 as a fixed member. The addition of the force-applying mechanism 6, which drives the axle box 11 to move through a mechanical structure, is more stable than the traditional method of using a crowbar to move the axle box 11, and solves the problem that the clearance value may deviate due to different amounts of force applied by the measuring personnel or different amounts of grease filling.

[0068] In some embodiments, the force-applying mechanism 6 includes:

[0069] The force application component 7 includes two mounting cylinders 71 mounted on the central rod 2. The two mounting cylinders 71 are connected to the top of the two mounting cylinders 71 by a threaded connection. The bottom of each of the two mounting cylinders 71 is provided with an inclined support plate 75. A first support cylinder 76 is connected between the bottom ends of the two support plates 75. The axial direction of the first support cylinder 76 is the second direction.

[0070] The force-bearing component 8 includes a lever plate 81 between two mounting cylinders 71. The top of the lever plate 81 has a force-bearing area 82 corresponding to the top pressure screw 74. The bottom of the lever plate 81 is provided with a relief groove 83 that is larger than the diameter of the central rod 2 and the outer diameter of the first support cylinder 76. The bottom end is provided with two second support cylinders 84 located on both sides of the first support cylinder 76 along the second direction. A support shaft 85 is installed between the second support cylinders 84 and the first support cylinder 76. The bottom of the two second support cylinders 84 is connected to the axle box 11.

[0071] like Figure 1 , Figure 7 and Figure 8 As shown, by rotating the top pressure screw 74, the force-bearing area 82 at the top of the lever plate 81 is pushed. Since the second support cylinder 84 is connected to the central rod 2 through the support shaft 85, the first support cylinder 76, the support plate 75, and the mounting cylinder 71, the lever plate 81 and the second support cylinder 84 rotate around the support shaft 85. As a result, the second support cylinder 84 drives the axle box 11 to swing in the opposite direction, thereby achieving the purpose of driving the axle box 11 to move horizontally. At the same time, due to the connection relationship of the second support cylinder 84, it can be ensured that the central rod 2 maintains a uniform state each time it is installed, thereby achieving the purpose of limiting the laser of the laser ranging module 33 to be emitted directly downwards.

[0072] In some embodiments, the force-bearing component 8 further includes two half beams 86 disposed at the bottom end of the second support cylinder 84, the bottom ends of the two half beams 86 are provided with a second limiting ring 87, the bottom ends of the second limiting ring 87 are provided with a limiting insert 88 for engaging with the screw hole 12 of the housing, the bottom ends of the limiting insert 88 are provided with a second stud 89 extending out of the screw hole 12 of the housing, and the bottom end of the second stud 89 is connected to a second nut 810 by a thread;

[0073] like Figure 1 and Figure 8As shown, the limiting pin 88 is inserted into the screw hole 12 of the housing, and the second limiting retaining ring 87 maintains initial stability. Then, the second stud 89 and the second nut 810 cooperate to achieve a stable connection between the two half beams 86 and the bearing box 11. This ensures that when the second support cylinder 84 rotates, it can stably drive the two half beams 86 to move the bearing box 11, thus achieving a stable driving purpose. Compared with a pry bar, this method is more stable.

[0074] In some embodiments, the laser detection mechanism 3 further includes a fixing component 4, which includes:

[0075] The first fork beam 41 is arranged in a U-shape above the axle box 11. The top end is equipped with the L-shaped mounting plate 34, and both ends of the bottom are provided with first limiting rings 42. The bottom end of the first limiting ring 42 is provided with a limiting plug, which is inserted into the screw hole 12 of the box.

[0076] The lower limit part connects to the limit plug and is used to restrict the limit plug from moving upward in the vertical direction.

[0077] like Figure 3 and Figure 4 As shown, the initial installation and fixation are achieved by inserting the limiting plug into the screw hole 12 of the housing, and then the limiting plug is connected to the lower limiting part to achieve the fixed installation of the first fork beam 41, thereby ensuring the stable installation of the detection plate 35.

[0078] In some embodiments, the limiting insert is a first positioning post 43, and the lower limiting part includes a first stud 44 disposed at the bottom end of the first positioning post 43, and a first nut 45 is threadedly connected to the bottom of the first stud 44. Figure 3 As shown, this connection method can fully ensure the stability of the first fork beam 41, and can fully ensure the stability of the detection plate 35 when the first fork beam 41 moves with the bearing box 11.

[0079] In some embodiments, the limiting insert is a first magnet 46, and the lower limiting part includes a second fork beam 47 located below the bearing housing 11 and in a U-shape. The top end of the second fork beam 47 is provided with a second magnet 48 that is inserted into the screw hole 12 of the housing. The adjacent ends of the first magnet 46 and the second magnet 48 are opposite magnetic poles. Figure 4 As shown, this connection method can quickly fix the limit plug, improve the installation speed of the first fork beam 41, and reduce the problem of long spiral rotation locking time.

[0080] In some embodiments, the center rod 2 has an external thread 63 at its head end and passes through the spoke hole 15 of the auxiliary wheel 14. The center rod 2 is slidably fitted with pressure plates 61 on both sides of the auxiliary wheel 14 along the first direction. Both pressure plates 61 are provided with clamping nuts 62 threadedly connected to the external thread 63 on both sides along the first direction. The outer diameter of the clamping nut 62 is larger than the diameter of the center hole of the pressure plate 61, and the inner diameter of the spoke hole 15 is smaller than the outer diameter of the pressure plate 61.

[0081] like Figure 1 and Figure 7 As shown, the center rod 2 is passed through the spoke hole 15 of the auxiliary wheel 14. By rotating the clamping nut 62, the pressure plate 61 is pressed against the side wall of the auxiliary wheel 14, thus realizing the installation and removal of the center rod 2. Further optionally, the pressure plate 61 on the side of the auxiliary wheel 14 near the force application mechanism 6 can be welded to the center rod 2, and the clamping nut 62 on that side can be removed. In this way, only one clamping nut 62 needs to be adjusted to achieve quick installation. Preferably, the pressure plates 61 are provided with fastening shims at their close ends. The deformation of the soft shims improves the stability and reliability of the center rod 2 after clamping.

[0082] In some embodiments, the top of the mounting cylinder 71 is provided with a U-shaped frame, and two top-pressing screws 74 are threadedly installed on the vertical part of the frame.

[0083] like Figure 7 As shown, the U-shaped frame keeps the two first support cylinders 76 in a unified structure, improving structural strength and maintaining the stability of the top-pressing screw 74 during use. Optionally, the U-shaped frame includes two side plates 72 and a top cover plate 73. The side plates 72 are integrally formed with the first support cylinders 76, while the top cover plate 73 is detachably installed on the top of the two side plates 72 by screws. Although this method reduces structural strength, it is more convenient for practical use. On the one hand, the separate setting of the side plates 72 and the top cover plate 73 facilitates the production of individual parts. On the other hand, when installing this measuring device, the top cover plate 73 can be removed first, and then the center rod 2 can be fixed on the auxiliary wheel 14. Then, the lever plate 81 can be moved downward through the clearance groove 83. After the installation of the lever plate 81 is completed, the top cover plate 73 is finally fixed. This method improves the convenience of installation and avoids the situation where the U-shaped frame and the mounting cylinder 71 are integrally formed, which is inconvenient for the lever plate 81.

[0084] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0085] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for measuring the clearance of a bearing in a DC electric locomotive axle box, mounted on an axle clamping mechanism (1), the axle clamping mechanism (1) comprising an axle clamp (11) for mounting the axle body, and auxiliary wheels (14) mounted at both ends of the axle clamp (11) via bearings (13), characterized in that, A laser detection mechanism (3) is mounted on the bearing mechanism (1), and the laser detection mechanism (3) includes: The center rod (2) is connected at its first end to the auxiliary wheel (14), and the direction of its axis extension is the same as the direction of the axle box (11). The laser assembly includes an L-shaped mounting plate (34) located above and connected to the axle box (11), on which a detection plate (35) is mounted. The detection plate (35) and the bottom plane of the L-shaped mounting plate (34) have a first included angle. The laser assembly also includes a laser ranging module (33) located at the tail end of the center rod (2) and corresponding to the position of the detection plate (35). The laser ranging module (33) is used to measure the distance between the laser ranging module (33) and the detection plate (35). Adjustment component (5), located on L-shaped mounting plate (34), is used to adjust the size of the first included angle; The force application mechanism (6) is located in the middle of the central rod (2) and is used to limit the laser of the laser ranging module (33) from being emitted directly downwards; The force-applying mechanism (6) is also used to push the axle box (11) to move along the first direction with the auxiliary wheel (14) as a fixed part; The force-applying mechanism (6) includes: The force application component (7) includes two mounting cylinders (71) mounted on the central rod (2). The two mounting cylinders (71) are connected to the top of the two mounting cylinders (71) by a top screw (74) through a thread. The bottom ends of the two mounting cylinders (71) are provided with inclined support plates (75). The bottom ends of the two support plates (75) are connected to a first support cylinder (76). The axial direction of the first support cylinder (76) is the second direction. The force-bearing component (8) includes a lever plate (81) between two mounting cylinders (71). The top of the lever plate (81) has a force-bearing area (82) corresponding to the top pressure screw (74). The bottom of the lever plate (81) is provided with a relief groove (83) larger than the diameter of the center rod (2) and the outer diameter of the first support cylinder (76). The bottom end is provided with two second support cylinders (84) located on both sides of the first support cylinder (76) along the second direction. A support shaft (85) is installed between the second support cylinder (84) and the first support cylinder (76). The bottom of the two second support cylinders (84) is connected to the bearing box (11).

2. The DC electric locomotive axle box bearing clearance measuring device according to claim 1, characterized in that, The adjustment component (5) include: The limiting part includes a first L-shaped groove (51) provided on the inner surface of the L-shaped mounting plate (34), and a second L-shaped groove (52) provided on both ends of the L-shaped mounting plate (34) along the second direction. The top of the detection plate (35) is provided with a limiting slide post (53) that moves along the vertical part of the second L-shaped groove (52) on both ends of the second direction. The bottom of the detection plate (35) is provided with a limiting slide post (53) that moves along the horizontal part of the second L-shaped groove (52) on both ends of the second direction. The second direction is perpendicular to the first direction. The adjustment part includes an adjustment window (54) located at the end of the first L-shaped groove (51). A cross adjustment member (56) is rotatably installed inside the adjustment window (54) via a fixed shaft (55). The lengths of the rods of the cross adjustment member (56) are not equal. The adjustment part also includes a positioning structure, which is used to limit the cross adjustment member (56) from rotating on its own when there is no operation.

3. The DC electric locomotive axle box bearing clearance measuring device according to claim 2, characterized in that, The top of the mounting cylinder (71) is provided with a U-shaped frame, and the two top-pressing screws (74) are threadedly installed on the vertical part of the frame.

4. The DC electric locomotive axle box bearing clearance measuring device according to claim 2, characterized in that, The force-bearing component (8) also includes two half beams (86) located at the bottom of the second support cylinder (84). The bottom of the two half beams (86) is provided with a second limiting ring (87). The bottom of the second limiting ring (87) is provided with a limiting insert (88) for fitting into the screw hole (12) of the housing. The bottom of the limiting insert (88) is provided with a second stud (89) extending out of the screw hole (12) of the housing. The bottom end of the second stud (89) is connected to a second nut (810) by a thread.

5. The DC electric locomotive axle box bearing clearance measuring device according to claim 1, characterized in that, The laser detection mechanism (3) further includes a fixing component (4), which includes: The first fork beam (41) is arranged in a U-shape above the axle box (11), with the L-shaped mounting plate (34) installed at the top and the first limiting ring (42) provided at both ends of the bottom. The first limiting ring (42) is provided with a limiting plug at the bottom end, and the limiting plug is inserted into the screw hole (12) of the box body. The lower limit part is connected to the limit plug and is used to limit the limit plug to move upward in the vertical direction.

6. The DC electric locomotive axle box bearing clearance measuring device according to claim 5, characterized in that, The limiting plug is a first positioning plug (43), and the lower limiting part includes a first stud (44) located at the bottom of the first positioning plug (43), and a first nut (45) is threadedly connected to the bottom of the first stud (44).

7. The DC electric locomotive axle box bearing clearance measuring device according to claim 5, characterized in that, The limiting plug is a first magnet (46), and the lower limiting part includes a second fork beam (47) located below the bearing box (11) and in the shape of a U-shape. The top of the second fork beam (47) is provided with a second magnet (48) inserted into the screw hole (12) of the box body. The close ends of the first magnet (46) and the second magnet (48) are opposite magnetic poles.

8. The DC electric locomotive axle box bearing clearance measuring device according to claim 1, characterized in that, The center rod (2) has an external thread (63) at its head end and passes through the spoke hole (15) of the auxiliary wheel (14). The center rod (2) is slidably fitted with pressure plates (61) on both sides of the auxiliary wheel (14) along the first direction. Both pressure plates (61) are provided with clamping nuts (62) threadedly connected to the external thread (63) on both sides along the first direction. The outer diameter of the clamping nut (62) is larger than the diameter of the center hole of the pressure plate (61), and the inner diameter of the spoke hole (15) is smaller than the outer diameter of the pressure plate (61).

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