Axle box bearing test tool for railway new energy locomotive bogie

Abstract

The utility model discloses an axle box bearing test tool for a railway new energy locomotive bogie, which comprises two oppositely arranged tool seats and a core shaft rotatably arranged between the two tool seats, the core shaft is sleeved with a shell, one end of the core shaft is provided with a driving piece used for driving the core shaft to axially rotate, and the other end of the core shaft is provided with a bearing. A to-be-tested bearing is connected between the outer circumferential walls of the two ends of the mandrel and the shell, and the shell is provided with a loading piece used for applying an axial load and a radial load to the shell and a limiting piece used for being matched with the loading piece to limit axial shaking or rotation of the shell. The axle box bearing testing tool solves the problem that when a mandrel of a traditional axle box bearing testing tool rotates at a high speed, a shell arranged on the mandrel in a sleeving mode shakes or rotates along with the high-speed rotation of the mandrel.

Description

Technical Field

[0001] This utility model relates to the field of axle box bearing testing fixtures, specifically a testing fixture for axle box bearings used in the bogies of new energy railway locomotives. Background Technology

[0002] In the railway transportation sector, bogie bearings play a crucial role in new energy locomotives. Bearing performance directly impacts the locomotive's operating efficiency and safety. Existing axle box bearing testing fixtures are insufficient in simulating actual operating conditions, especially at high speeds. Shaking or rotation of the housing can lead to inaccurate test results, affecting the accurate assessment of bearing performance. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a testing fixture for axle box bearings used in the bogies of new energy railway locomotives. This fixture solves the problem that the housing fitted on the mandrel in traditional axle box bearing testing fixtures shakes or rotates as the mandrel rotates at high speed.

[0004] To achieve the above objectives, this utility model provides a testing fixture for axle box bearings used in the bogies of new energy railway locomotives. The fixture includes two oppositely arranged fixture seats and a mandrel rotatably disposed between the two fixture seats. A housing is fitted onto the mandrel. One end of the mandrel is provided with a driving component for driving the mandrel to rotate axially. Bearings to be tested are connected between the outer peripheral walls of both ends of the mandrel and the housing. The housing is provided with loading components for applying axial and radial loads to the housing, and limiting components that cooperate with the loading components to restrict axial swaying or rotation of the housing.

[0005] The advantages of adopting the above technical solution are as follows: The mandrel is installed between two opposing tooling seats, and two test bearings are installed at both ends of the mandrel. The mandrel is started by a drive component to rotate axially. During the rotation of the mandrel, a predetermined axial and radial load can be applied to the housing using a loading component according to the test requirements. During the high-speed rotation of the mandrel, a limiting component ensures the stability of the housing during the test. After the test is completed, the drive component is turned off, and the rotation of the mandrel is stopped. Based on the test data, the bearing performance is evaluated, guiding the bearing design and maintenance. The limiting component effectively solves the housing sway problem of traditional test fixtures during high-speed operation. Simultaneously, the loading component applies axial and radial loads to the housing, increasing the test range and limiting the axial sway or rotation of the housing, ensuring the stability and accuracy of the bearing under simulated actual operating conditions. This technical solution not only improves the reliability of bearing testing but also provides important technical support for the design and maintenance of bogie bearings for new energy locomotives, demonstrating significant practical value and promising prospects for wider application.

[0006] The present invention further includes the following configuration: the loading member includes a radial loading shaft disposed on one side of the housing, the beginning of the radial loading shaft being connected to the outer peripheral wall of the housing, and the end of the radial loading shaft being oscillatingly provided with a first force-bearing head for connecting to the output end of an external hydraulic device, and the radial loading shaft being disposed perpendicular to the housing.

[0007] The advantages of adopting the above technical solution are: when testing the bearing, an external hydraulic device can be activated according to the testing requirements and to simulate the actual operating conditions of the bearing. The output end of the external hydraulic device applies a load and acts on the radial loading shaft through the first force-bearing head, so that the load is applied to the housing through the radial loading shaft, thereby making the tested bearing subject to radial load, thus simulating the actual operating conditions of the bearing under radial load, thereby improving the testing range and testing accuracy. In the above technology, the hydraulic device can be a hydraulic cylinder or a hydraulic push rod, which are existing technologies, so their structure and function will not be described in detail.

[0008] The present invention further includes: the loading member further includes an axial loading shaft disposed on one side of the housing, the beginning of the axial loading shaft being movably connected to the outer wall of the radial loading shaft and the axial loading shaft being perpendicular to the radial loading shaft, the axial axis of the axial loading shaft being in the same direction as the axis of the spindle, and the end of the axial loading shaft being provided with a second force-receiving head for connecting to the output end of an external hydraulic cylinder.

[0009] The advantages of adopting the above technical solution are: when testing the bearing, an external hydraulic cylinder can be activated according to the test requirements and to simulate the actual operating force conditions of the bearing. The output end of the external hydraulic cylinder applies a load and acts on the axial loading shaft through the second force head. The axial loading shaft is loaded and acts on the radial loading shaft, which in turn applies the load to the housing through the radial loading shaft. This causes the test bearing to be subjected to axial load, thereby simulating the actual operating conditions of the bearing under axial load, thus improving the test range and test accuracy. The hydraulic cylinder in the above technology is existing technology, so its structure and function will not be described in detail.

[0010] The present invention further comprises: the limiting member including a support base disposed below the housing and a limiting ring disposed on the top of the support base; the limiting ring having a through hole for the housing to pass through; a limiting tooth groove being circumferentially formed on the inner peripheral wall of the through hole; the housing being cylindrical; a mating tooth groove being circumferentially formed on the outer peripheral wall of the housing for interlocking and engaging with the limiting tooth groove; a limiting groove being formed between two adjacent teeth of the limiting tooth groove for a single tooth of the mating tooth groove to be inserted along the axis of the mandrel; and the outer peripheral wall of each tooth in the mating tooth groove being clearance-fitted with the inner peripheral wall of the corresponding limiting groove.

[0011] The advantages of adopting the above technical solution are as follows: The setting of the limiting tooth groove and the mating tooth groove in the above technology is used to allow the mating tooth groove on the mandrel to engage with the limiting tooth groove when the tooling seats are respectively placed at both ends of the mandrel. In this way, when the mandrel rotates at high speed and generates a load on the housing, the meshing of the teeth of the mating tooth groove and the teeth of the limiting tooth groove restricts the housing from rotating or shaking significantly, thereby improving the limiting strength of the housing and preventing the rotation or shaking of the housing from affecting the operation of the mandrel and the bearing testing accuracy. At the same time, the outer peripheral wall of each tooth in the mating tooth groove is set with a clearance fit with the inner peripheral wall of the corresponding limiting groove to avoid excessive meshing rigidity between the limiting tooth groove and the mating tooth groove, which could damage the housing.

[0012] The present invention is further provided in that: both tooling seats are provided with test holes, the two ends of the mandrel are respectively inserted into the adjacent test holes, and the two ends of the mandrel are respectively connected to the corresponding test holes with test bearings, the test bearings being self-aligning roller bearings.

[0013] The advantages of adopting the above technical solution are: the test hole and test bearing in the above technology are used to support the mandrel, avoid damage to the mandrel due to excessive rigidity, and improve the smoothness of the mandrel rotation between the two tooling seats; in the above technology, a test cavity for the test bearing to operate is formed between the housing and the mandrel, and the test cavity can be closed by locking the nut and cover plate to achieve grease lubrication of the test bearing. According to the test requirements, an oil hole can be opened on the housing to connect with the external oil supply equipment to achieve grease lubrication circulation in the test cavity. That is, by setting up the test bearing, plus the sealing of the test cavity and the circulation of grease lubrication, the rotation accuracy and rotation efficiency of the mandrel are improved, while simulating the actual operating conditions of the bearing.

[0014] The present invention further includes the following configuration: the driving component includes a connecting shaft for connecting to the output end of an external servo motor, and the connecting shaft is coaxially connected to the spindle.

[0015] The advantages of adopting the above technical solution are: the connection shaft in the above technology is used to connect with an external servo motor so that it rotates synchronously when the external servo motor starts and drives the spindle to rotate, thereby simulating the actual operating conditions of the bearing, thereby improving the testing efficiency and testing accuracy. The servo motor in the above technology is existing technology, so its structure, function and connection method will not be described in detail. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention. Detailed Implementation

[0018] This utility model provides a testing fixture for axle box bearings used in the bogies of new energy railway locomotives. It includes two opposing fixture seats 1 and a mandrel 11 rotatably disposed between the two fixture seats 1. A housing 2 is fitted onto the mandrel 11. One end of the mandrel 11 is provided with a driving component for axial rotation. Bearings to be tested are connected between the outer peripheral walls of both ends of the mandrel 11 and the housing 2. The housing 2 is provided with loading components for applying axial and radial loads to the housing 2, and limiting components that cooperate with the loading components to restrict axial swaying or rotation of the housing 2. The loading component includes... A radial loading shaft 21 is positioned on one side of the housing 2. The starting end of the radial loading shaft 21 is connected to the outer peripheral wall of the housing 2. The end of the radial loading shaft 21 is oscillatingly equipped with a first force-receiving head 211 for connecting to the output end of an external hydraulic device. The radial loading shaft 21 is perpendicular to the housing 2. The loading component also includes an axial loading shaft 22 positioned on one side of the housing 2. The starting end of the axial loading shaft 22 is movably connected to the outer wall of the radial loading shaft 21, and the axial loading shaft 22 is perpendicular to the radial loading shaft 21. The axial direction of the axial loading shaft 22 is in the same direction as the axial direction of the spindle 11. The axial loading shaft 22 is provided with a second force-receiving head 221 at its end for connection to the output end of an external hydraulic cylinder. The limiting component includes a support base 3 located below the housing 2 and a limiting ring 31 located on top of the support base 3. The limiting ring 31 has a hollow hole 32 for the housing 2 to pass through. A limiting tooth groove 321 is circumferentially formed on the inner peripheral wall of the hole 32. The housing 2 is cylindrical. A mating tooth groove 33 is circumferentially formed on the outer peripheral wall of the housing 2 for mating and engaging with the limiting tooth groove 321. A mating tooth groove is formed between two adjacent teeth of the limiting tooth groove 321. A single tooth of the toothed groove 33 is inserted into a limiting groove 322 along the axial direction of the mandrel 11. The outer peripheral wall of each tooth in the toothed groove 33 is clearance-fitted with the inner peripheral wall of the corresponding limiting groove 322. Each of the two tooling seats 1 is provided with a test hole 12. Both ends of the mandrel 11 are respectively inserted into the adjacent test holes 12, and both ends of the mandrel 11 are respectively connected to their respective test holes 12 with a test bearing 13. The test bearing 13 is a self-aligning roller bearing. The driving component includes a connecting shaft 23 for connecting to the output end of an external servo motor. The connecting shaft 23 is coaxially connected to the mandrel 11.

[0019] The oil hole described in the above technology is identified as 4 in the accompanying drawings of the specification, and the bearing to be tested described in the above technology is identified as 5 in the accompanying drawings of the specification.

[0020] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A testing fixture for axle box bearings used in the bogies of new energy railway locomotives, characterized in that: It includes two oppositely arranged tooling seats and a mandrel rotatably arranged between the two tooling seats. A housing is sleeved on the mandrel. A driving component for driving the mandrel to rotate axially is provided at one end of the mandrel. Bearings to be tested are connected between the outer peripheral walls of both ends of the mandrel and the housing. The housing is provided with a loading component for applying axial and radial loads to the housing and a limiting component for cooperating with the loading component to limit the axial sway or rotation of the housing.

2. The testing fixture for axle box bearings of a railway new energy locomotive bogies according to claim 1, characterized in that: The loading component includes a radial loading shaft disposed on one side of the housing. The beginning of the radial loading shaft is connected to the outer peripheral wall of the housing, and the end of the radial loading shaft is oscillatingly provided with a first force-bearing head for connecting to the output end of an external hydraulic device. The radial loading shaft is disposed perpendicular to the housing.

3. The testing fixture for axle box bearings of a railway new energy locomotive bogies according to claim 2, characterized in that: The loading component also includes an axial loading shaft disposed on one side of the housing. The beginning of the axial loading shaft is movably connected to the outer wall of the radial loading shaft and the axial loading shaft is perpendicular to the radial loading shaft. The axial axis of the axial loading shaft is in the same direction as the axis of the spindle. The end of the axial loading shaft is provided with a second force-receiving head for connecting to the output end of an external hydraulic cylinder.

4. The testing fixture for axle box bearings of a railway new energy locomotive bogies according to claim 3, characterized in that: The limiting component includes a support base disposed below the housing and a limiting ring disposed on the top of the support base. The limiting ring has a through hole for the housing to pass through. A limiting tooth groove is formed circumferentially on the inner peripheral wall of the through hole. The housing is cylindrical. A mating tooth groove is formed circumferentially on the outer peripheral wall of the housing for interlocking and engaging with the limiting tooth groove. A limiting groove is formed between two adjacent teeth of the limiting tooth groove for a single tooth of the mating tooth groove to be inserted along the axis of the mandrel. The outer peripheral wall of each tooth in the mating tooth groove is clearance-fitted with the inner peripheral wall of the corresponding limiting groove.

5. The testing fixture for axle box bearings of a railway new energy locomotive bogies according to claim 1, characterized in that: Both tooling bases are provided with test holes. The two ends of the mandrel are respectively inserted into the adjacent test holes, and the two ends of the mandrel are respectively connected to their respective test holes with test bearings. The test bearings are self-aligning roller bearings.

6. The testing fixture for axle box bearings of a railway new energy locomotive bogies according to claim 1, characterized in that: The drive unit includes a connecting shaft for connecting to the output end of an external servo motor, and the connecting shaft is coaxially connected to the spindle.

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