Thrust roller bearing testing machine

Abstract

The utility model relates to the technical field of bearing detection, in particular to a thrust roller bearing testing machine, which comprises a bottom fixing seat, and a driving swing mechanism, a driving shaft, a test bearing loading mechanism, a test bearing, a pressure loading mechanism and a loading hydraulic cylinder are sequentially arranged above the bottom fixing seat from bottom to top. A power motor for providing driving force for the slewing mechanism is arranged on the slewing driving mechanism positioned at the bottom; the testing machine has a large load, tests two sets of bearings at the same time, changes the original connection mode of the driving end of the testing machine, and prevents the driving end from being affected by axial thrust. And test requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing detection, in particular to a thrust roller bearing testing machine. Background Art

[0002] At present, there is a lack of large-load testing machines for thrust roller bearings, especially for top drive thrust roller bearings. In addition, the existing testing machines for detecting thrust bearing performance indicators usually have indicators such as load capacity and rotational speed. Due to the structural setting of the testing machine, there are inevitable influences during its operation. For example, the ordinary connection method of the main shaft drive end of the testing machine is easily affected by the axial thrust during operation, which limits the drive. This hinders the testing of the bearings, cannot meet the test requirements, and has low test efficiency. Utility Model Content

[0003] In view of the background of the above-mentioned testing machine, the purpose of the present invention is to provide a thrust roller bearing testing machine, which has a large load capacity and can test two sets of bearings at the same time. It changes the original connection mode of the driving end of the testing machine to prevent the driving end from being affected by the axial thrust and thus meet the test requirements.

[0004] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a thrust roller bearing testing machine, comprising: a bottom fixed seat, above which are arranged, from bottom to top, a driving rotary mechanism, a driving shaft, a test bearing loading mechanism, a test bearing, a pressure loading mechanism, and a loading hydraulic cylinder; the rotary driving mechanism at the bottom is provided with a power motor that provides driving force for the rotary mechanism;

[0005] The test machine scheme described above uses a power motor to drive a rotary mechanism to rotate. The rotation of the rotary mechanism drives the driving spindle to rotate synchronously, thereby driving the tested bearing in the test bearing loading mechanism to rotate.

[0006] During the above-mentioned test bearing rotation process, the test is judged to be qualified by monitoring the temperature and abnormal noise of the test bearing after the test bearing rotates for a certain period of time, and this is used as the judgment condition. It should be noted that when the operator is testing the bearing using the testing machine, if the bearing makes an abnormal noise, the test of the bearing is stopped; otherwise, the bearing is disassembled and the bearing raceway is observed. If there is no abnormality, the test bearing is judged to have passed the inspection; and regardless of the test result of the test bearing, it is necessary to disassemble and inspect the test bearing.

[0007] Furthermore, the lower end of the driving shaft of the testing machine close to the bottom fixed seat is the driving end, and the end opposite to the driving end is the loading end;

[0008] Furthermore, the bottom fixing seat is a structure having upper and lower edge connecting parts and a cavity in the center, the driving rotary mechanism is contained in the cavity and the center of the bottom fixing seat is concentrically arranged with the driving rotary mechanism;

[0009] Furthermore, the lower edge of the bottom fixing seat is fixed to the horizontal workbench by bolts;

[0010] Furthermore, the driving rotation mechanism includes: a fixed shaft, a pulley and a pulley support bearing; the pulley is rotatably arranged outside the fixed shaft through the pulley support bearing, and the bottom of the fixed shaft is arranged in a bottom fixed seat; the inner diameter of the pulley is fixedly matched with the outer sleeve of the pulley support bearing, and the outer diameter is provided with a serrated structure; the outer diameter of the fixed shaft is fixedly matched with the inner sleeve of the pulley support bearing; when working, the pulley can rotate relative to the fixed shaft through the pulley support bearing;

[0011] Furthermore, the rotation of the pulley in the driving rotary mechanism is driven by a gear disposed externally and meshing with the teeth of the pulley, and the gear is connected to the output shaft of the power motor;

[0012] Furthermore, the upper edge of the bottom fixing seat is fixedly connected to the test bearing loading mechanism by bolts; the test bearing loading mechanism includes: an outer shell, the outer shell has a cavity structure, and the drive shaft passes through the center of the outer shell; the driving end of the drive shaft passes through the bottom of the outer shell and extends to the pulley; two sets of test bearings are arranged in the area between the outer diameter of the drive shaft and the inner diameter of the outer shell, and the two sets of test bearings are separated by a partition;

[0013] Furthermore, the drive shaft is connected to two sets of test bearings, which are in contact with the partition, and the partition rotates with the drive shaft during rotation;

[0014] Furthermore, the two sets of test bearings are thrust roller bearings and are arranged symmetrically with each other. Each set of test bearings includes a shaft ring and a seat ring. The shaft ring contacts the partition, and there is an interference fit between the shaft ring and the drive shaft, and a clearance fit between the seat ring and the drive bearing. Therefore, the two sets of test bearings in contact with the partition rotate with the drive shaft together with the shaft ring and the partition.

[0015] Furthermore, the pulley and the driving end of the drive shaft are connected by a spline, in order to prevent the driving end from being affected by axial thrust and thus affecting the drive;

[0016] Furthermore, the edge of the outer shell protrudes from the outer diameter surface to form a protrusion, the protrusion is provided with a bolt hole, and the upper surface of the upper edge of the bottom fixing seat is provided with a bolt blind hole matching the bolt hole of the protrusion; the upper edge of the bottom fixing seat is connected to the protrusion of the outer shell of the test bearing loading mechanism by bolts.

[0017] Furthermore, the upper end of the outer shell is fixedly connected to the pressure loading mechanism at its upper end by bolts; the pressure loading mechanism includes: a loading shell, the loading shell is an internal hollow structure, the internal cavity is provided with a pressure sensor, the pressure sensor is located directly above the drive shaft, and the lower end surface of the pressure sensor is evenly provided with a plurality of loading columns in the circumferential direction, and the loading columns are respectively connected to the pressure sensor by bolts; the lower end surfaces of the plurality of loading columns are provided on the upper test bearing through a loading plate;

[0018] Furthermore, the number of the loading columns is set to 8 and is evenly arranged at the lower end of the pressure sensor for evenly transmitting pressure;

[0019] Furthermore, a stepped platform is provided at the upper end of the outer shell, and a mating portion is formed at the lower end of the loading shell to match the stepped platform of the outer shell, and the loading shell is connected to the outer shell through bolts at the mating portion.

[0020] Furthermore, a loading hydraulic cylinder is provided above the pressure loading mechanism, and the loading hydraulic cylinder is fixedly connected to the upper end of the loading housing by bolts.

[0021] In the above-mentioned testing machine scheme, another inventive concept is to prevent radial movement of the two sets of test bearings arranged above and below. The means is to embed a set of working bearings between the drive shaft and the loading plate above the upper test bearing and between the drive shaft and the inner wall of the external shell below the lower test bearing, respectively, to meet the test requirements.

[0022] Furthermore, the outer diameters of the upper and lower ends of the drive shaft near the working bearing are relatively small and form matching surfaces with the outer diameter and end face of the inner sleeve of the working bearing.

[0023] The working principle of the testing machine with the above structure is:

[0024] During the test, the power motor drives the pulley to rotate through the engagement of the gear and the pulley. Since the pulley and the drive shaft are splined, they drive the drive shaft to rotate synchronously; the rotation of the drive shaft drives the upper and lower sets of test bearings to rotate; the loading hydraulic cylinder above the testing machine applies pressure to the pressure sensor, and the pressure sensor transmits the pressure to the test bearing through several loading columns at its lower end, thereby achieving the bearing loading state; when the test bearing rotates for a certain period of time, the bearing test is completed by observing the abnormal noise of the bearing and taking off the machine to observe the raceway condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of the utility model.

[0026] Figure 2 It is an overall three-dimensional diagram of the testing machine of the utility model.

[0027] In the figure, 1, bottom fixed seat, 2, driving shaft, 3, test bearing, 3.1, shaft ring, 3.2, seat ring, 4, loading hydraulic cylinder, 5, horizontal workbench, 6, fixed shaft, 7, pulley, 8, pulley support bearing, 9, external housing, 10, partition, 11, loading housing, 12, pressure sensor, 13, loading column, 14, loading plate, 15, working bearing. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] like Figure 1 A thrust roller bearing testing machine is shown, comprising: a bottom fixed base 1, above which are arranged, from bottom to top, a driving rotary mechanism, a driving shaft 2, a test bearing loading mechanism, a test bearing 3, a pressure loading mechanism, and a loading hydraulic cylinder 4; the rotary driving mechanism at the bottom is provided with a power motor that provides driving force for the rotary mechanism;

[0030] The test machine scheme described above uses a power motor to drive a rotary mechanism to rotate. The rotation of the rotary mechanism drives the driving spindle to rotate synchronously, thereby driving the tested bearing in the test bearing loading mechanism to rotate.

[0031] During the above-mentioned test bearing rotation process, the test is judged to be qualified by monitoring the temperature and abnormal noise of the test bearing 3 after the test bearing rotates for a certain period of time, which is used as the judgment condition. It should be noted that when the operator is testing the bearing using the testing machine, if the bearing makes an abnormal noise, the test of the bearing is stopped; otherwise, the bearing is disassembled and the bearing raceway is observed. If there is no abnormality, the test bearing is judged to have passed the test;

[0032] The lower end of the driving shaft 2 of the testing machine close to the bottom fixed seat 1 is the driving end, and the end opposite to the driving end is the loading end;

[0033] The bottom fixing seat 1 is a structure with upper and lower edge connection parts and a cavity in the center. The driving rotary mechanism is contained in the cavity and the center of the bottom fixing seat 1 is concentric with the driving rotary mechanism.

[0034] The lower edge of the bottom fixing base 1 is fixed to the horizontal workbench 5 by bolts;

[0035] The driving rotation mechanism includes: a fixed shaft 6, a pulley 7 and a pulley support bearing 8; the pulley 7 is rotatably arranged on the outside of the fixed shaft 6 through the pulley support bearing 8, and the bottom of the fixed shaft 6 is arranged in the bottom fixed seat 1; the inner diameter of the pulley 7 is fixedly matched with the outer sleeve of the pulley support bearing 8, and the outer diameter is provided with a serrated structure; the outer diameter of the fixed shaft 6 is fixedly matched with the inner sleeve of the pulley support bearing 8; when working, the pulley 7 can rotate relative to the fixed shaft 6 through the pulley support bearing 8;

[0036] The rotation of the pulley 7 in the driving rotary mechanism is driven by a gear arranged on the outside and meshing with the teeth of the pulley 7, and the gear is connected to the output shaft of the power motor;

[0037] The upper edge of the bottom fixing seat 1 is fixedly connected to the test bearing loading mechanism by bolts; the test bearing loading mechanism comprises: an external shell 9, the internal cavity structure of the external shell 9, the drive shaft 2 passes through the center of the external shell 9; the driving end of the drive shaft 2 passes through the lower bottom of the external shell 9 and extends into the pulley 7; two sets of test bearings 3 are arranged in the area between the outer diameter of the drive shaft 2 and the inner diameter of the external shell 9, and the two sets of test bearings 3 are separated by a partition 10; the drive shaft 2 is connected to the two sets of test bearings 3; the two sets of test bearings 3 are in contact with the partition 10, and the partition 10 rotates with the drive shaft 2 during rotation;

[0038] Specifically, the two sets of test bearings 3 are thrust roller bearings and are symmetrically arranged with each other. Each set of test bearings 3 includes a shaft ring 3.1 and a seat ring 3.2. The shaft ring 3.1 contacts the partition 10, and the shaft ring 3.1 and the drive shaft 2 have an interference fit, and the seat ring 3.2 and the drive shaft 2 have a clearance fit; therefore, the two sets of test bearings 3 in contact with the partition 10 have the shaft ring 3.1 and the partition 10 rotate with the drive shaft 2 together.

[0039] The pulley 7 and the driving end of the drive shaft 2 are connected by a spline to prevent the driving end from being affected by axial thrust and affecting the drive;

[0040] Furthermore, the edge of the outer shell 9 protrudes from the outer diameter surface to form a protrusion, and a bolt hole is provided on the protrusion. The upper surface of the upper edge of the bottom fixing seat 1 is provided with a bolt blind hole that matches the bolt hole of the protrusion; the upper edge of the bottom fixing seat 1 is connected to the protrusion of the outer shell 9 of the test bearing loading mechanism through bolts.

[0041] The upper end of the outer housing 9 is fixedly connected to the pressure loading mechanism at its upper end by bolts; the pressure loading mechanism includes: a loading housing 11, which is a hollow structure. The internal cavity is provided with a pressure sensor 12, and the pressure sensor 12 is located directly above the drive shaft 2. The lower end surface of the pressure sensor 12 is evenly provided with a plurality of loading columns 13 in the circumferential direction. The loading columns 13 are respectively connected to the pressure sensor 12 by bolts; the lower end surfaces of the plurality of loading columns 13 are provided on the upper test bearing 3 via a loading plate 14;

[0042] In this embodiment, the number of the loading columns 13 is set to 8 and they are evenly arranged at the lower end of the pressure sensor 12.

[0043] The upper end of the outer shell 9 is provided with a stepped platform, and the lower end of the loading shell 11 forms a matching portion that matches the stepped platform of the outer shell 9. The loading shell 11 is connected to the outer shell 9 through bolts on the matching portion.

[0044] A loading hydraulic cylinder 4 is provided above the pressure loading mechanism, and the loading hydraulic cylinder 4 is fixedly connected to the upper end of the loading housing 11 by bolts.

[0045] In the above-mentioned testing machine scheme, another inventive concept is to prevent radial movement of the two sets of test bearings 3 arranged above and below each other by embedding a set of working bearings 15 between the drive shaft 2 and the loading plate 14 above the upper test bearing, and between the drive shaft 2 and the inner wall of the outer housing 9 below the lower test bearing.

[0046] The working principle of the testing machine with the above structure in this embodiment is:

[0047] During the test, the power motor drives the pulley 7 to rotate through the engagement of the gear and the pulley 7. Since the pulley 7 and the drive shaft 2 are splined, the drive shaft 2 is driven to rotate synchronously; the rotation of the drive shaft 2 drives the upper and lower sets of test bearings 3 to rotate; the loading hydraulic cylinder 4 above the test machine applies pressure to the pressure sensor 12, and the pressure sensor 12 transmits the pressure to the test bearing 3 through several loading columns 13 at its lower end, thereby achieving the bearing loading state; when the test bearing 3 rotates for a certain period of time, the bearing test is completed by observing the abnormal noise of the bearing and observing the raceway condition after getting off the machine.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0051] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

Claims

1. A thrust roller bearing testing machine, characterized in that: include: A bottom fixed seat, above which a driving rotary mechanism, a driving shaft, a test bearing loading mechanism, a test bearing, a pressure loading mechanism and a loading hydraulic cylinder are arranged in sequence from bottom to top; the rotary driving mechanism at the bottom is provided with a power motor that provides driving force for the rotary mechanism.

2. A thrust roller bearing testing machine according to claim 1, characterized in that: The bottom fixing seat is a structure with upper and lower edge connecting parts and a cavity in the center. The driving rotary mechanism is contained in the cavity and the center of the bottom fixing seat is concentrically arranged with the driving rotary structure.

3. The thrust roller bearing testing machine according to claim 1, characterized in that: The driving rotation mechanism includes: a fixed shaft, a pulley and a pulley support bearing; the pulley is rotatably arranged on the outside of the fixed shaft through the pulley support bearing, and the bottom of the fixed shaft is arranged in the bottom fixed seat; the inner diameter of the pulley is fixedly fitted on the outer sleeve of the pulley support bearing, and the outer diameter is provided with a serrated structure; the outer diameter of the fixed shaft is fixedly fitted on the inner sleeve of the pulley support bearing.

4. The thrust roller bearing testing machine according to claim 2, characterized in that: The upper edge of the bottom fixing seat is fixedly connected to the test bearing loading mechanism by bolts; the test bearing loading mechanism includes: an external shell, the internal part of the external shell is a cavity structure, and the drive shaft passes through the center of the external shell; the driving end of the drive shaft passes through the lower bottom of the external shell and extends to the pulley; two sets of test bearings are arranged in the upper and lower areas between the outer diameter of the drive shaft and the inner diameter of the external shell, and the two sets of test bearings are separated by a partition.

5. The thrust roller bearing testing machine according to claim 4, characterized in that: The driving shaft is connected to two sets of test bearings, and the two sets of test bearings are in contact with the partition. During the rotation process, the partition rotates together with the driving shaft.

6. The thrust roller bearing testing machine according to claim 3, characterized in that: The pulley and the driving end of the drive shaft are connected by spline.

7. The thrust roller bearing testing machine according to claim 4, characterized in that: The upper end of the outer shell is fixedly connected to the pressure loading mechanism at its upper end by bolts; the pressure loading mechanism includes: a loading shell, the loading shell is an internal hollow structure, and a pressure sensor is provided in the internal cavity. The pressure sensor is located directly above the drive shaft, and a plurality of loading columns are evenly arranged in the circumferential direction of the lower end surface of the pressure sensor. The loading columns are respectively connected to the pressure sensor by bolts; the lower end surfaces of the plurality of loading columns are arranged on the upper test bearing through a loading plate.

8. The thrust roller bearing testing machine according to claim 7, characterized in that: The number of the loading columns is set to 8 and they are evenly arranged at the lower end of the pressure sensor.

9. The thrust roller bearing testing machine according to claim 7, characterized in that: A loading hydraulic cylinder is arranged above the pressure loading mechanism, and the loading hydraulic cylinder is fixedly connected to the upper end of the loading housing by bolts.

10. The thrust roller bearing testing machine according to claim 7, characterized in that: A set of working bearings is respectively embedded between the drive shaft and the loading plate above the upper test bearing and between the drive shaft and the inner wall of the outer shell below the lower test bearing.

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