An alternating current electric locomotive axle box bearing clearance detection device

Abstract

This utility model discloses a device for detecting the clearance of an axle box bearing in an AC electric locomotive. It includes a first lifting square tube, with force-bearing rods symmetrically arranged at both ends of the first lifting square tube via lateral clearance adjustment components. A second lifting square tube is fixedly mounted at the end of the force-bearing rods away from the first lifting square tube, and a fixing plate is fixedly mounted at the end of the second lifting square tube away from the corresponding force-bearing rod. A longitudinal clearance adjustment component is mounted on the fixing plate. This device for detecting the clearance of an AC electric locomotive axle box bearing allows for the measurement of axle box bearing clearance by lifting the axle box without disassembling the wheelset. This method is quick, convenient, and improves the testing progress. Furthermore, the lateral and longitudinal clearance adjustment components allow for adjustment of the lateral distance between the two fixing plates and the longitudinal position of the axle box between the two fixing plates, catering to different locomotive models and demonstrating strong practicality.

Description

Technical Field

[0001] This utility model relates to the technical field of axle box bearing clearance detection device, and in particular to an AC electric locomotive axle box bearing clearance detection device. Background Technology

[0002] The axle box is a critical component of electric locomotives, and the axial clearance of the axle box bearing is a key factor in ensuring its service life. Existing HXD1 AC electric locomotives have experienced abnormal wear of their axle box bearings during operation, necessitating measurement of the axial clearance. For clearances exceeding the limit, the thickness of the adjusting shims needs to be adjusted to meet the requirements. Currently, the axle box bearing clearance can only be measured after disassembling the wheels. However, the disassembly and pressing process carries the risk of scoring, and the wheelset assembly requires a 48-hour resting period before wheel back-pressing, impacting the testing schedule.

[0003] Therefore, this invention proposes a device for measuring the clearance of axle box bearings in AC electric locomotives. This device can measure the clearance of axle box bearings by lifting the weight of the axle box without disassembling the wheel, which is quick and convenient. Utility Model Content

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

[0005] This utility model provides a device for detecting the clearance of an axle box bearing in an AC electric locomotive. It includes a first lifting square tube arranged horizontally, and vertical force-bearing rods symmetrically arranged at both ends of the first lifting square tube through a transverse clearance adjustment component. A second lifting square tube is fixedly arranged horizontally at the end of the force-bearing rod away from the first lifting square tube. A fixing plate is fixedly arranged at the end of the second lifting square tube away from the corresponding force-bearing rod. A longitudinal clearance adjustment component is arranged on the fixing plate.

[0006] In the testing state, the axle box is fixed between the two fixing plates, and the dial indicator is fixedly installed on the handle of the gear sealing ring of the axle box.

[0007] Furthermore, the top of the tension rod is provided with a lifting hole for fixing the lifting rope.

[0008] Furthermore, the lateral clearance adjustment assembly includes a first mounting hole located on the tension rod below the lifting hole. Both ends of the first lifting square tube are provided with a plurality of second mounting holes at even intervals along its length direction corresponding to the first mounting hole. A first locking bolt assembly is provided through one of the second mounting holes and the corresponding first mounting hole, for fixing the two tension rods to the two ends of the first lifting square tube respectively.

[0009] Furthermore, the longitudinal gap adjustment assembly includes a third mounting hole disposed on the side of the fixed plate away from the corresponding second lifting square tube. Multiple third mounting holes are evenly spaced along the vertical direction. A second locking bolt assembly is disposed corresponding to the third mounting hole, and the shaft box is fixed between the two fixed plates by the second locking bolt assembly.

[0010] Furthermore, a lower stiffening plate is fixedly provided between the tension rod and the corresponding second lifting square tube to improve the structural stability between the two.

[0011] Furthermore, it also includes a support platform assembly for supporting the wheelset and the axle box as a whole, the support platform assembly including an annular support platform, the bottom surface of which is fixedly provided with three support legs along its circumference.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The AC electric locomotive axle box bearing clearance detection device of this utility model can measure the axle box bearing clearance by lifting the weight of the axle box without disassembling the wheelset. It is quick, convenient and improves the detection progress.

[0014] In addition, the lateral clearance adjustment component and the longitudinal clearance adjustment component can be used to adjust the lateral distance between the two fixed plates and the longitudinal position of the axle box fixed between the two fixed plates, so as to meet the needs of different vehicle models and have strong practicality.

[0015] It should be understood that the content described in the utility model description section is not intended to limit the key or important features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model.

[0016] Other features of this invention will become readily apparent from the following description. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 A schematic diagram of the structure of an AC electric locomotive axle box bearing clearance detection device and its assembly with the axle box and wheelset, provided for an embodiment of this utility model;

[0019] Figure 2 This is a structural schematic diagram of a tension rod under load;

[0020] Figure 3 A top-view structural diagram of the supporting platform;

[0021] The diagram labels are as follows: 1. First lifting square tube; 2. Tension rod; 3. Lateral clearance adjustment assembly; 31. First assembly hole; 32. Second assembly hole; 33. First locking bolt assembly; 4. Second lifting square tube; 5. Fixing plate; 6. Longitudinal clearance adjustment assembly; 61. Third assembly hole; 62. Second locking bolt assembly; 7. Lifting hole; 8. Lower stiffening plate; 9. Support platform assembly; 91. Support platform; 92. Support leg; 10. Axle box; 11. Wheelset; Detailed Implementation

[0022] 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 relevant 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.

[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Please refer to Figures 1-3 The present invention provides an AC electric locomotive axle box bearing clearance detection device, including a first lifting square tube 1 arranged in the horizontal direction, and vertical force-bearing rods 2 symmetrically arranged at both ends of the first lifting square tube 1 through a transverse clearance adjustment component 3. The two force-bearing rods 2 are arranged in an inverted U-shape with the first lifting square tube 1.

[0025] A second lifting square tube 4 is fixedly installed in the horizontal direction at the end of the tension rod 2 away from the first lifting square tube 1, and the two second lifting square tubes 4 are arranged opposite each other; a fixing plate 5 is fixedly installed at the end of the second lifting square tube 4 away from the corresponding tension rod 2, and a longitudinal gap adjustment component 6 is installed on the fixing plate 5.

[0026] In the testing state, the axle box 10 is installed and fixed between two fixed plates 5, and the dial indicator is fixedly installed on the handle of the gear sealing ring of the axle box 10. It is used to measure the difference between the two measurements before and after lifting the axle box 10 and the wheelset 11 as a whole to obtain the bearing clearance of the axle box 10.

[0027] In a preferred embodiment, the top of the tension rod 2 is provided with a lifting hole 7 for fixing the lifting rope (i.e., sling), that is, fixing the axle box 10 and wheelset 11 as a whole to the testing device, and then lifting the testing device and the axle box 10 and wheelset 11 as a whole by means of an overhead crane.

[0028] In a preferred embodiment, the lateral clearance adjustment assembly 3 includes a first mounting hole 31 located below the lifting hole 7 on the tension rod 2. Both ends of the first lifting square tube 1 are provided with a plurality of second mounting holes 32 at even intervals along its length direction corresponding to the first mounting hole 31. A first locking bolt assembly 33 is provided through a second mounting hole 32 and the corresponding first mounting hole 31 to fix the two tension rods 2 to the two ends of the first lifting square tube 1 respectively.

[0029] The first mounting hole 31 is adapted to multiple second mounting holes 32, which allows for lateral adjustment of the distance between the two force-bearing tie rods 2, thus making it suitable for different vehicle models and highly practical.

[0030] In a preferred embodiment, the longitudinal gap adjustment component 6 includes a third mounting hole 61 disposed on the side of the fixed plate 5 away from the corresponding second lifting square tube 4. Multiple third mounting holes 61 are evenly spaced along the vertical direction. A second locking bolt assembly 61 is disposed corresponding to the third mounting hole 61. The axle box 10 is fixed between the two fixed plates 5 by the second locking bolt assembly 62. That is, the installation between the axle box 10 and the two fixed plates 5 is completed by the second locking bolt assembly 62 passing through the corresponding third mounting hole 61 and the joint between the axle box 10 and the motor.

[0031] Similar to the principle of the lateral clearance adjustment component 3, by setting multiple evenly spaced third mounting holes 61, the axle box 10 is fixed on the corresponding third mounting holes 61, which can be adapted to the use of different vehicle models and is highly practical.

[0032] In a preferred embodiment, a lower stiffening plate 8 is fixedly provided between the tension rod 2 and the corresponding second lifting square tube 4 to improve the structural stability between the two.

[0033] In a preferred embodiment, a support platform assembly 9 is further included for supporting the wheelset 11 and the axle box 10 as a whole. The support platform assembly 9 includes an annular support platform 91, and three support legs 92 are fixedly arranged on the bottom surface of the support platform 91 along its circumference. During the testing process, the support platform assembly 9 is used to support the axle box 10 and the wheelset 11 as a whole, which facilitates the installation with the testing device.

[0034] The detection principle of this utility model application:

[0035] The core of measuring the axial clearance of a split tapered roller bearing is to apply a specified axial force and measure the maximum amount of axial movement of the inner ring relative to the outer ring, thereby reflecting the size of the axial clearance of the bearing.

[0036] The principle is based on the structural characteristics of tapered roller bearings: there is a certain assembly clearance between the inner ring, outer ring, and rollers of the bearing. When a force is applied to the inner or outer ring of the bearing along the axial direction, the parts will undergo relative displacement due to the clearance. Specifically, when measuring the axial clearance of a toothed bearing, the bearing housing is placed vertically on the outer ring of the bearing so that the clearance between the inner and outer rings of the bearing housing is zero, and the dial indicator data is recorded at this time. Then, the bearing housing is lifted by the bearing clearance measuring device so that the clearance between the inner and outer rings of the bearing reaches its maximum, and the dial indicator data is recorded at this time. The difference between the two dial indicator data is the clearance of the toothed bearing housing.

[0037] This measurement method can directly reflect the axial range of motion of the bearing in actual operation, ensuring the stability and reliability of the bearing during installation and operation.

[0038] The testing process for the utility model of this application:

[0039] First, the assembly of the axle box 10 and the wheelset 11 is lifted vertically along the axis of the wheelset 11 and placed on the support platform 91, with the support point being the outer side of the wheel rim of the wheel 11.

[0040] Then, the electronic scale with the sling is lifted by the overhead crane and the sling is installed on the clearance measuring device of the axle box 10. The two fixing plates 5 are installed on the mating surface between the axle box 10 and the motor through the longitudinal clearance adjustment assembly 6, thus completing the installation and fixing between the axle box 10 and the measuring device. The hook of the overhead crane is directly above the axle.

[0041] Clean the upper surface of the gear ring with cotton yarn. Place the dial indicator magnetic base on the oil return handle of the gear sealing ring, and place the pointer on the upper surface of the gear ring. Zero the dial indicator and rotate the bearing housing 10 fully to distribute the bearing grease evenly on the bearing guide rail. Observe whether the pointer of the dial indicator is deviated from the zero mark. If there is a deviation, zero the pointer and continue to rotate the bearing housing until the dial indicator is no longer deviated from the zero mark. Record the data.

[0042] Slowly lift the electronic scale using an overhead crane, allowing the bearing housing 10 to rise gradually. Stop lifting when the scale reading reaches 400-450 kg. Fully rotate the bearing housing 10 left and right to evenly distribute the bearing grease on the bearing guide rails. If the scale reading decreases, lift the scale again using the overhead crane until the reading returns to 400-450 kg. Fully rotate the bearing housing 10 left and right, repeating this process until the scale reading is still within the 400-450 kg range after rotating the bearing housing 10. Then, read the dial indicator reading. The difference between the two dial indicator readings is the bearing clearance value of the bearing housing.

[0043] 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.

[0044] 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.

[0045] 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 detecting the clearance of an axle box bearing in an AC electric locomotive, characterized in that, The device includes a first lifting square tube arranged horizontally, with vertical force-bearing rods symmetrically arranged at both ends of the first lifting square tube via a horizontal gap adjustment assembly. A second lifting square tube is fixedly arranged horizontally at the end of the force-bearing rod away from the first lifting square tube, and a fixing plate is fixedly arranged at the end of the second lifting square tube away from the corresponding force-bearing rod. A longitudinal gap adjustment assembly is arranged on the fixing plate. In the testing state, the axle box is fixed between the two fixing plates, and the dial indicator is fixedly installed on the handle of the gear sealing ring of the axle box.

2. The AC electric locomotive axle box bearing clearance detection device according to claim 1, characterized in that, The top of the tension rod is provided with a lifting hole for fixing the lifting rope.

3. The AC electric locomotive axle box bearing clearance detection device according to claim 2, characterized in that, The lateral clearance adjustment assembly includes a first mounting hole located below the lifting hole on the tension rod. Multiple second mounting holes are evenly spaced at both ends of the first lifting square tube along its length direction corresponding to the first mounting hole. A first locking bolt assembly is provided through one of the second mounting holes and the corresponding first mounting hole to fix the two tension rods to the two ends of the first lifting square tube respectively.

4. The AC electric locomotive axle box bearing clearance detection device according to claim 1, characterized in that, The longitudinal gap adjustment assembly includes a third mounting hole disposed on the side of the fixed plate away from the corresponding second lifting square tube. Multiple third mounting holes are evenly spaced along the vertical direction. A second locking bolt assembly is disposed corresponding to the third mounting hole. The shaft box is fixed between the two fixed plates by the second locking bolt assembly.

5. The AC electric locomotive axle box bearing clearance detection device according to claim 1, characterized in that, A lower stiffening plate is fixed between the tension rod and the corresponding second lifting square tube to improve the structural stability between the two.

6. The AC electric locomotive axle box bearing clearance detection device according to claim 1, characterized in that, It also includes a support platform assembly for supporting the wheelset and the axle box as a whole, the support platform assembly including an annular support platform, and three support legs fixedly arranged on the bottom surface of the support platform along its circumference.

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