A device for measuring wheel runout under wheelset conditions

Abstract

A device for measuring wheel jump under wheel set state, comprising bearing assembly and column corresponding to bearing seat position of both ends of axle respectively, the bearing assembly comprises inner ring and outer ring of bearing, the outer baffle of bearing is fixed on the side of inner ring of bearing away from axle, the outer baffle of bearing has through hole for bolt corresponding to screw thread of axle, rotating device is arranged on the outside of outer baffle of bearing, the upper part of column has recess corresponding to bearing assembly, the top of side edge of recess has bearing pressing plate which can close and open the recess, gear box support table and lever dial gauge corresponding to measuring position are arranged between two columns. The device can accurately and effectively measure jump value of tread and inner side of wheel, and can avoid waste caused by disassembly of axle box bearing due to replacement of wheel caused by out-of-tolerance measurement result. It is not only suitable for wheel set jump measurement of harmonious electric locomotive, but also suitable for wheel set jump measurement of diesel locomotive, subway and other wheels with wheel set structure.

Description

Technical Field

[0001] This invention relates to the field of locomotive wheelset assembly and inspection technology, and in particular to a device capable of measuring wheel runout. Background Technology

[0002] During the assembly of electric locomotive drive systems, strict testing requirements are placed on the runout of the wheel treads and inner lateral surfaces after installation. If the measured runout values ​​do not meet the requirements, resonance will occur, affecting the comfort of locomotive operation and even endangering the operational safety of the locomotive. Therefore, the accuracy of wheel tread and inner lateral surface runout testing is particularly important. If the measurements do not meet the requirements, problems can be detected in a timely manner, and qualified wheels can be replaced to ensure the safe operation of the locomotive.

[0003] The existing solution is as follows: For the drive unit of the hollow axle structure of the electric locomotive, after the axle box is assembled, the entire drive unit is hoisted onto the tooling, the axle box is placed on the tooling table, and the gearbox is supported to separate the hollow axle from the gearbox, ensuring that the rotating axle is friction-free. Two dial indicators are placed on the wheel tread and the inner side of the wheel, respectively. The wheel is rotated at a constant speed, and the change in the dial indicator reading is observed. The change value is the wheel runout value.

[0004] For drive units with hollow axle structures in electric locomotives, direct measurement of wheel runout after wheelset press-fitting can result in significant errors due to support point issues. Axle box bearings are necessary to ensure measurement accuracy, meaning wheel runout can only be measured after the axle box assembly is complete. If the measured value exceeds the tolerance at this stage, the axle box assembly must be disassembled before wheel runout can be adjusted. This disassembly process necessitates replacing the axle box bearings, leading to substantial maintenance costs. Summary of the Invention

[0005] To address the technical problems of high operational difficulty, low efficiency, and high maintenance costs in existing technologies, this invention provides a device for measuring wheel bounce in a wheelset state.

[0006] The technical solution of the present invention is as follows:

[0007] A device for measuring wheel bounce in a wheelset configuration, characterized by comprising bearing assemblies and columns corresponding to the bearing seats at both ends of the axle, wherein the bearing assembly includes an inner bearing ring and an outer bearing ring, an outer bearing baffle is fixed to the side of the inner bearing ring away from the axle, the outer bearing baffle has a bolt through hole corresponding to the thread of the axle, a rotating device is provided on the outer side of the outer bearing baffle, the upper part of the column has a groove corresponding to the bearing assembly, the top of one side of the groove has a bearing pressure plate that can close and open the groove, and a gearbox support platform and a lever dial indicator corresponding to the measurement position are provided between the two columns.

[0008] Preferably, the rotating device is a rotating disc connected to the outer baffle of the bearing by bolts, or the rotating device is a motor with the motor rotor connected to the threaded hole at the end of the axle.

[0009] Preferably, circular handles are welded to both sides of the outer ring of the bearing.

[0010] Preferably, the groove is a U-shaped groove.

[0011] Preferably, the bearing pressure plate is connected to the column via a hinge.

[0012] Preferably, the column, gearbox support, and lever dial indicator are mounted on a horizontal platform surface.

[0013] Preferably, the platform between the columns is equipped with an adjustable motor support base that can be hydraulically upgraded or electrically lifted.

[0014] Preferably, the lever dial indicator is attached to a magnetic platform base disposed on the platform surface.

[0015] Preferably, the side of the column is provided with stiffening plates.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention allows for the installation of bearing assemblies (inner bearing ring, outer bearing ring, circular handle, and outer bearing baffle) at the axle journal after wheelset pressing. The entire assembly is then hoisted onto a measuring device. Depending on the vehicle model and drive system, the gearbox can be placed on a gearbox support platform. The height of the adjustable motor support is adjusted to ensure the motor of the drive system with a motor structure rests smoothly on the adjustable motor support. The bearing assembly is then seated in the "U" groove of the column, and the bearing pressure plate is closed to ensure the outer bearing ring does not rotate. The rotating device is connected to the outer bearing baffle as a single unit. Two lever dial indicators are installed at the magnetic platform base, with the indicator heads placed on the inner side of the wheel and the tread surface, respectively. The rotating wheel is then rotated to observe the changes in the dial indicator values ​​and the runout values ​​between the inner side of the wheel and the tread surface.

[0018] This invention employs a bearing structure to assemble and install the bearing in the axle bearing seat. The inner ring of the bearing is connected to the threaded hole on the axle end face via an outer bearing baffle, thus integrating the inner ring of the bearing with the axle and maintaining stable wheel rotation. The design of the two side pillars accommodates the axial distance of the wheelset and ensures that the wheel is completely suspended in the air. The bearing pressure plate is mounted on the side of the pillar via hinges. When the wheelset is placed into the U-shaped groove of the pillar, clamping the bearing pressure plate secures the outer ring of the bearing, preventing any movement during bearing assembly. Based on the characteristics of different vehicle models' drive systems and assembly process requirements, a gearbox support platform and an adjustable motor support seat are provided to provide stable support for different vehicle models' drive systems and ensure the accuracy of bearing clearance measurement. This invention can accurately measure the runout value between the wheel tread and the inner surface after the wheelset is press-fitted, avoiding the waste of bearings caused by disassembling the axle box assembly due to excessive wheel runout after axle box assembly.

[0019] This device can accurately and effectively measure the runout values ​​of the wheel tread and inner side, avoiding the waste caused by replacing wheels due to out-of-tolerance measurement results and disassembling axle box bearings. This device is not only suitable for measuring the runout of wheelsets in Harmony-type electric locomotives, but also for measuring the runout of wheelsets in diesel locomotives, subways, and other vehicles with wheelset structures. Attached Figure Description

[0020] Figure 1 This is an isometric view of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the bearing assembly and installation on the wheelset in an embodiment;

[0022] Figure 3 This is an axonometric view of the wheelset without it in place, as shown in the embodiment.

[0023] Figure 4 This is a schematic diagram of wheelset measurement in an embodiment.

[0024] Figure label:

[0025] 1-Bearing inner ring; 2-Bearing outer ring; 3-Ring handle; 4-Bearing outer baffle; 5-Bearing pressure plate; 6-Rotating wheel; 7-Hinge; 8-Column; 9-Firming plate; 10-Platform; 11-Gearbox support platform; 12-Adjustable motor support base; 13-Magnetic platform base; 14-Bearing assembly. Detailed Implementation

[0026] To better understand the present invention, the following explanation is provided in conjunction with the accompanying drawings and embodiments.

[0027] Example

[0028] This embodiment provides a device for measuring wheel bounce in a wheelset configuration, such as... Figure 1-4As shown, the assembly includes a bearing assembly 14 and a column 8 corresponding to the bearing seats at both ends of the axle. The column 8 is set on the surface of the horizontal platform 10. The bearing assembly 14 includes an inner bearing ring 1 and an outer bearing ring 2. The inner bearing ring 1 has a flange (not shown) on one side facing the axle, and an outer bearing baffle 4 is welded to the other side. The outer bearing baffle 4 has three through holes and is threadedly connected to the axle with bolts, so that the axle and the bearing are linked as one unit. At the same time, the outer bearing baffle 4 can restrict the axial movement of the bearing.

[0029] After welding circular handles 3 on both sides of the outer ring 2 of the bearing, it is convenient for personnel to install the bearing onto the axle; a rotating wheel 6 is provided on the outer side of the outer baffle 4 of the bearing, which is connected to the outer baffle 4 of the bearing by bolts. Rotating the rotating wheel 6 can drive the inner ring 1 of the bearing to rotate, thereby realizing the rotation of the axle.

[0030] Below the outer ring 2 of the bearing is a column 8 with a U-shaped groove. The bearing assembly 14 is placed on the U-shaped groove and fits completely. The bearing pressure plate 5 is connected to the column 8 through a hinge 7, which can realize two states: "open" and "closed". There are four round holes on both sides of the bearing pressure plate 5. In the closed state, the bolt passes through the round holes and connects to the threaded hole on the upper surface of the column 8, so that the bearing pressure plate 5 can clamp the outer ring 2 of the bearing. The stiffening plate 9 is installed on three sides of the column 8 and connected to the platform 10 to stabilize the column 8 and avoid measurement errors caused by lateral and longitudinal vibration when the axle rotates.

[0031] The gearbox support platform 11 is located between the two columns 8 on the left side of the figure and is connected to the surface of the platform 10. Since the oil pan is not installed at the bottom of the gearbox when the wheelset is pressed, the driven gear will be exposed outside the gearbox body. Therefore, the gearbox support platform 11 is a hollow cuboid structure. Its edges can support the installation position of the oil pan at the bottom of the gearbox, and the hollow part in the middle can avoid contact with the driven gear.

[0032] The adjustable motor support 12 is located slightly to the right of the middle of the two columns 8 and is connected to the surface of the platform 10. The adjustable motor support 12 consists of upper and lower support plates, support rods, and hydraulic cylinders. Depending on the assembly characteristics of different vehicle models, the height of the upper support plate is adjusted by the hydraulic cylinder to achieve the function of motor support. If there is no motor structure drive device, the upper support plate can be adjusted to the lowest position.

[0033] The magnetic platform seat 13 is located on the inner side and the lower front side of the wheel, and is connected to the platform 10. Its upper surface is milled flat to attract the lever dial indicator used for measurement.

[0034] The working process of this embodiment is as follows:

[0035] like Figure 2As shown, first install the bearing assembly 14 onto the axle bearing seat. Align the outer bearing baffle 4 with the three threaded holes on the axle end face and tighten the outer bearing baffle 4 to the axle with bolts. Hoist the drive unit with the bearing assembly 14 installed onto the measuring platform, so that the gearbox rests on the gearbox support platform 11, ensuring that the exposed driven gear rests on the inner hole and outer wall of the gearbox support platform 11 without contact. Place the outer bearing ring 2 into the U-shaped groove of the column 8, adjust the height of the adjustable motor support 12 to support the motor, close the bearing pressure plate 5, and tighten the bearing pressure plate 5 with four bolts to clamp the outer bearing ring 2 so that it cannot rotate. Attach the lever dial indicator to the magnetic platform base 13, adjust the lever angle so that the dial indicator head hits the inner side of the wheel and the tread surface. Use bolts to fix the rotating wheel 6 to the threaded hole of the outer bearing baffle 4. Rotate the rotating wheel 6 at a constant speed by hand to make the wheel axle rotate. Observe the changes in the values ​​of the two dial indicators. The amount of change is the runout value of the wheel tread and inner side.

[0036] Although the functions and working processes of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific functions and working processes described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these are within the protection scope of the present invention.

[0037] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for measuring wheel bounce in a wheelset configuration, characterized in that... The bearing assembly and the column corresponding to the bearing seat position at both ends of the axle respectively, the bearing assembly comprises a bearing inner ring and a bearing outer ring, the bearing outer baffle is fixed on the side of the bearing inner ring away from the axle, the bearing outer baffle has a bolt through hole corresponding to the thread of the axle, a rotating device is arranged on the outside of the bearing outer baffle, the upper part of the column has a groove corresponding to the bearing assembly, the top of the side edge of the groove has a bearing pressing plate capable of closing and opening the groove, a gear box support table and a lever dial gauge corresponding to the measurement position are arranged between the two columns, the rotating device is a rotating disc connected with the bearing outer baffle through a bolt, or the rotating device is a motor, the motor rotor is connected with the thread hole of the axle end, a round ring handle is welded on both sides of the bearing outer ring, and the bearing pressing plate is connected to the column through a hinge.

2. A device for measuring wheel runout of a wheelset in a state of a wheelset according to claim 1, characterized in that The groove is a U-shaped groove.

3. A device for measuring wheel runout of a wheelset in a state of a wheelset according to claim 1, characterized in that The column, the gear box support table and the lever dial gauge are installed on the horizontal platform surface.

4. A device for measuring wheel runout of a wheelset in a state of a wheelset according to claim 3, characterized in that An adjustable motor support seat in hydraulic lifting mode or electric lifting mode is arranged on the platform between the columns.

5. A device for measuring wheel runout of a wheelset in a state of a wheelset according to claim 3, characterized in that The lever dial gauge is adsorbed on a magnetic platform seat arranged on the platform surface.

6. A device for measuring wheel runout of a wheelset under a condition of a wheelset according to claim 1, characterized in that The side surface of the column is provided with a rib plate.

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