A device for measuring the raceway angle difference of crossed cylindrical roller bearings

Abstract

This invention belongs to the field of bearing angle measurement, specifically providing a device for measuring the raceway angle difference of crossed cylindrical roller bearings. The device includes a base with a reference plane for supporting the bearing under test. A measuring arm is connected to the base, and the measuring arm has a measuring section at a predetermined angle to the reference plane. This predetermined angle is equal to the design angle between the raceway surface and the end face of the bearing under test. A positioning rod and a measuring gauge spaced at a predetermined distance from the positioning rod along the extension direction of the measuring section are mounted on the measuring section. The positioning rod is perpendicular to the measuring section and has a positioning probe that contacts the raceway surface during use. The measuring gauge measures the distance difference between its measuring point on the raceway surface and the contact point between the positioning probe and the raceway surface in the direction perpendicular to the raceway surface. The raceway angle difference is calculated by the distance difference and the predetermined distance. This invention can quantify the raceway angle difference result and has high accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of bearing angle measurement, and in particular relates to a device for measuring the raceway angle difference of crossed cylindrical roller bearings. Background Technology

[0002] The raceway face angle of crossed cylindrical roller bearings is an important technical indicator. Existing measurement methods include the optical gap method, which requires the use of... Figure 1 The measuring template 200 shown has a flat surface for supporting the end face of the bearing 100 being measured and an inclined surface for conforming to the bearing 100 being measured. The angle between the inclined surface and the flat surface is generally 45° (corresponding to the angle between the ideal raceway and the horizontal plane). During measurement, if... Figure 2 As shown, the measuring template 200 is mounted on the bearing 100 to be tested so that the inclined surface is in contact with the raceway surface. The size of the gap between the raceway surface of the bearing 100 to be tested and the measuring template 200 is directly observed to determine whether the raceway angle is qualified.

[0003] The above method is greatly affected by human factors, making it difficult to quantify the measurement results and accurately determine whether the tested bearing 100 is qualified. Moreover, for larger bearings, the size of the measuring template 200 used is also larger, and correspondingly, the error caused by human observation is also greater. Utility Model Content

[0004] The purpose of this invention is to provide a device for measuring the raceway angle difference of crossed cylindrical roller bearings, so as to solve the technical problem of inaccurate measurement of the raceway angle difference in the prior art.

[0005] To achieve the above objectives, the technical solution of the cross cylindrical roller bearing raceway angle difference measuring device provided by this utility model is as follows:

[0006] A device for measuring the raceway angle difference of a crossed cylindrical roller bearing includes a base with a reference plane for supporting the bearing under test. A measuring arm is connected to the base, and the measuring arm has a measuring section at a set angle to the reference plane. The set angle is equal to the design angle between the raceway surface and the end face of the bearing under test. A positioning rod and a measuring gauge are installed on the measuring section at a set distance from the positioning rod in the extension direction of the measuring section. The positioning rod is perpendicular to the measuring section and has a positioning probe that contacts the raceway surface during use. The measuring gauge is used to measure the distance difference between the measuring point on the raceway surface and the contact point between the positioning probe and the raceway surface in the direction perpendicular to the raceway surface. The raceway angle difference is calculated by the distance difference and the set distance.

[0007] As a further improvement, the measuring instrument has a measuring probe that contacts the raceway surface during use so that the contact point constitutes the measuring point.

[0008] As a further improvement, the measuring arm also has a vertical section, which is connected to the base.

[0009] As a further improvement, the base is provided with a connection hole, through which the vertical section passes to connect with the base. The vertical section is equipped with a height-adjustable connection structure, so that the connection position between the vertical section and the connection hole can be changed by adjusting the height-adjustable connection structure, thereby adjusting the height of the measuring section.

[0010] As a further improvement, the connecting hole is a smooth hole, and the vertical section has an external thread structure that passes through the connecting hole from top to bottom. The vertical section is equipped with a locking nut connected to the external thread structure and an upper stop structure that protrudes radially outward from the external thread structure. The upper stop structure is located above the connecting hole so that the vertical section can be fixed to the base by the cooperation of the locking nut and the upper stop structure. The height-adjustable connecting structure includes multiple adjusting shims. The adjusting shims can be fitted between the upper stop structure and the connecting hole so that the connection position between the vertical section and the connecting hole can be changed by changing the number of adjusting shims fitted.

[0011] As a further improvement, the measuring section is provided with mounting holes, and the positioning rod passes through the mounting holes to connect with the measuring section. The positioning rod is equipped with a position-adjustable connection structure, so that the connection position between the positioning rod and the mounting hole can be changed by adjusting the position-adjustable connection structure, thereby adjusting the distance between the positioning probe and the measuring section.

[0012] As a further improvement, the mounting hole is a smooth hole, and the positioning rod has an external thread structure that passes through the mounting hole. The positioning rod is equipped with a clamping nut connected to the external thread and an inner stop structure that protrudes radially outward from the external thread structure. The positioning rod is fixed on the measuring section by the cooperation of the clamping nut and the inner stop structure. The position-adjustable connection structure includes multiple adjusting shims. The adjusting shims can be fitted between the inner stop structure and the mounting hole, so that the connection position between the positioning rod and the mounting hole can be changed by changing the number of adjusting shims fitted.

[0013] As a further improvement, the measuring gauge is located on the upper side of the positioning rod.

[0014] This utility model is a pioneering invention, and its beneficial effects are as follows: When using the measuring device provided by this utility model, the bearing to be measured can be placed horizontally on a reference plane, and the positioning rod installed on the measuring section of the measuring arm can be placed against the raceway surface. The contact point between the positioning probe of the positioning rod and the raceway surface is the selected basic contact point. The distance between the measuring instrument and the positioning rod is set, which can be defined as C. During actual measurement, the position of the measuring instrument facing the raceway surface can determine the measurement point. The distance difference E between the measuring point and the basic contact point in the direction perpendicular to the raceway surface is measured by the measuring instrument. The angle between the line connecting the basic contact point and the actual measurement point and the measuring section is the actual raceway angle difference. Since the angle between the measuring section and the reference plane is equal to the angle between the raceway surface and the end face of the bearing to be measured, and the positioning rod is perpendicular to the measuring section, the angle difference α between the line connecting the basic contact point and the actual measurement point and the measuring section can be obtained by using the inverse trigonometric function relationship, combining the actual measured E and the set distance C with the inverse trigonometric function formula. This quantifies the angle difference measurement result and ensures the accuracy of the measurement result. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the measurement template used in the prior art;

[0016] Figure 2 This is a schematic diagram of the measurement template used in the prior art during the measurement process;

[0017] Figure 3 This is a design dimension drawing for a crossed cylindrical roller bearing.

[0018] Figure 4 This is a schematic diagram illustrating the implementation of the cross cylindrical roller bearing raceway angle difference measuring device of this utility model during use.

[0019] Figure 5 This is a partial view of the measurement position in an embodiment of the cross cylindrical roller bearing raceway angle difference measuring device of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100. Bearing under test; 200. Measuring template; 1. Measuring arm; 2. Positioning rod; 3. Measuring gauge; 4. Base; 5. Positioning probe; 6. Measuring probe; 7. Locking nut; 8. Nut washer; 9. Adjusting shim; 10. Pressing nut; 11. Adjusting shim; 101. Vertical section; 102. Measuring section; 401. Overhanging section. Detailed Implementation

[0022] To improve the accuracy of the raceway angle difference measurement results for crossed cylindrical roller bearings, the basic concept of this utility model is to provide a measuring device. This device can measure the distance difference E between two points spaced a certain distance C on the actual raceway surface of the bearing under test in the direction perpendicular to the raceway surface. It can also calculate the angle difference α between the actual raceway surface and the designed raceway surface through inverse trigonometric function transformation. This allows the angle difference measurement results to be quantified, and the measurement structure can be compared with the design allowable error to determine whether the bearing under test is qualified.

[0023] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0024] The specific implementation method of the cross cylindrical roller bearing raceway angle difference measuring device (hereinafter referred to as the measuring device) provided by this utility model is as follows:

[0025] Measuring devices such as Figure 4 As shown, in its most basic form, it includes a base 4, which has a reference plane. This reference plane supports the bearing 100 being tested; that is, when the bearing 100 is placed horizontally, its end face can be in contact with the reference plane. A measuring arm 1 is connected to the base 4. The measuring arm 1 has a measuring section 102, which forms a set angle with the reference plane. This angle is equal to the designed angle between the raceway surface and the end face of the bearing 100 being tested. Figure 3 The 45° shown.

[0026] A positioning rod 2 and a measuring gauge 3 are installed on the measuring section 102. The measuring gauge 3 and the positioning rod 2 are spaced at a predetermined distance C along the extension direction of the measuring section 102. The positioning rod 2 is perpendicular to the measuring section 102. When measuring angular differences, such as... Figure 4 As shown, the positioning rod 2 has a positioning probe 5 that contacts the raceway surface. Ideally, the contact between the positioning probe 5 and the raceway surface is a point contact, which can be defined as the basic contact point. When measuring the angle difference, the measuring gauge 3 has a position facing the raceway surface. Therefore, a point on the raceway surface that faces the measuring gauge 3 can be determined, and this point can be defined as the measurement point.

[0027] Ideally, the line connecting the measuring point and the base contact point is parallel to the measuring section 102. However, in actual production, bearings inevitably have errors. There is an angle α between the line connecting the two points and the measuring section 102. This angle α is the raceway surface angle difference.

[0028] Table 3 can measure the distance difference E between the measurement point and the base contact point in the direction perpendicular to the raceway surface, such as... Figure 5 As shown, the lines connecting the basic contact point, the actual measurement point, and the ideal measurement point can form a right triangle for auxiliary calculation. The lengths of the two legs of the right triangle are C and E, respectively. These can be calculated using inverse trigonometric functions. This allows for the measurement of the angle difference between the raceway surfaces of the tested bearing and the 100mm raceway surface.

[0029] The measuring device provided in this embodiment can accurately measure the angle difference of the actual raceway surface. Compared with the optical gap method in the prior art, this embodiment can quantify the measurement results, ensuring the accuracy of the measurement results. Of course, in actual operation, the bearing 100 under test or the measuring device can be moved to measure the results at different positions of the raceway surface.

[0030] Regarding how to measure the aforementioned distance difference E, in some preferred embodiments, the measuring table 3 can be configured as a contact-type measuring table, that is, as... Figure 4 As shown, the measuring instrument 3 has a measuring probe 6. During use, the measuring probe 6 contacts the raceway surface, and this contact point constitutes the aforementioned measuring point. Specifically, the measuring instrument 3 can be a dial indicator or a micrometer. During measurement, the dial indicator or micrometer value can be set to a negative value beforehand. Using a contact-type measuring instrument facilitates operation by on-site personnel and is also less expensive.

[0031] However, it should be noted that in some implementations, the measuring instrument 3 can also be configured as a non-contact measuring instrument, such as a laser rangefinder. When using the laser rangefinder, it can maintain a certain distance from the raceway surface. The reading during measurement needs to be subtracted from the distance between the laser rangefinder and the positioning probe 5 (perpendicular to the raceway surface) to obtain the distance difference E.

[0032] In some preferred embodiments, such as Figure 4 As shown, the measuring arm 1 has a measuring section 102 and a vertical section 101. The measuring arm 1 is connected to the base 4 through the vertical section 101. In this case, the vertical section 101 is equivalent to a support leg for the measuring section 102, which can ensure the stability of the measuring arm 1 and also facilitate the connection of the measuring arm 1 to the base 4.

[0033] It should be noted that in other alternative embodiments, the measuring arm 1 may not include the vertical section 101, and the measuring section 102 may extend downwards for a longer distance and be directly connected to the base 4.

[0034] Based on the vertical section 101 of the measuring arm 1, and more preferably considering that the specifications of the bearings 100 being measured are not the same, in order to make the measuring arm 1 applicable to bearings 100 of different specifications, the measuring arm 1 can be configured as a height-adjustable measuring arm 1. Specifically, a connecting hole is provided on the base 4, and the vertical section 101 passes through the connecting hole to achieve its connection with the base 4. A height-adjustable connecting structure is provided for the vertical section 101, and the connection position between the vertical section 101 and the connecting hole can be adjusted through the height-adjustable connecting structure, thereby changing the height of the measuring section 102, so that when the measuring device measures bearings 100 of different specifications, the measuring position can be as close as possible to the center position of the raceway surface.

[0035] Regarding how to set up a height-adjustable connection structure, the following are several typical examples:

[0036] In one feasible embodiment, such as Figure 4 As shown, the connecting hole can be set as a smooth hole, with the vertical section 101 extending through the connecting hole from top to bottom. The vertical section 101 has an external thread structure that can pass through the smooth hole and protrude from the bottom side of the connecting hole. For easy connection, an overhanging section 401 can be connected to the base 4. A locking nut 7 is provided for the vertical section 101, and the locking nut 7 is connected to the external thread structure. At the same time, the vertical section 101 is also equipped with a stop structure, which is located above the base 4 and can be defined as an upper stop structure. The stop structure protrudes radially outward from the external thread structure, specifically it can be an annular protrusion or circumferentially spaced block protrusions. The stop structure and the locking nut 7 cooperate one above the other to fasten the vertical section 101 to the base 4. To ensure the fastening effect, a nut washer 8 can be connected between the locking nut 7 and the base 4.

[0037] The above describes a method where the vertical section 101 passes through the base 4 (cantilever section 401) and is fixed with a locking nut 7. In this case, if position adjustment is required, it can be achieved by adding or removing adjusting shims 9. Specifically, the above-mentioned height-adjustable connection structure includes multiple adjusting shims 9, such as... Figure 4 As shown, the adjusting shim 9 can be fitted between the upper stop structure of the vertical section 101 and the connecting hole, so that the connection position between the vertical section 101 and the connecting hole can be changed by changing the number of the fitted adjusting shims 9 (equivalent to raising or lowering the vertical section 101).

[0038] In one feasible embodiment, the height-adjustable connection structure can also be achieved by a threaded connection between the vertical section 101 and the base 4. For example, the base 4 is provided with a threaded hole, the vertical section 101 is provided with an external thread, and the connection between the external thread and the threaded hole is used to achieve fixation. If it is necessary to adjust the position of the vertical section 101, it can be done by screwing the vertical section 101 (equivalent to a screw and nut mechanism).

[0039] In one feasible embodiment, the height-adjustable connection structure can also adopt a set screw structure. In this case, the connection hole on the base 4 can be set as a light hole, and multiple radial set screws (tightening screws) can be configured on the light hole. The vertical section 101 passes through the light hole and is fixed by the set screws. If it is necessary to adjust the vertical section 101 to rise or fall, the set screws can be loosened. At this time, the vertical section 101 can move up and down. After adjusting the vertical section 101 to the position, the set screws can be tightened.

[0040] For bearings of different specifications, in a preferred embodiment, the positioning rod 2 can also be equipped with a position-adjustable structure that adjusts the distance between the positioning probe 5 and the measuring section 102. Specifically, the measuring section 102 is provided with a mounting hole, and the positioning rod 2 passes through the mounting hole to achieve its connection with the measuring section 102. The positioning rod 2 is equipped with a position-adjustable connection structure so that the connection position between the positioning rod 2 and the mounting hole can be changed by adjusting the position-adjustable connection structure, thereby adjusting the distance between the positioning probe 5 and the measuring section 102.

[0041] Similarly, regarding how to set up a position-adjustable connection structure, the following are several typical embodiments:

[0042] In one feasible embodiment, such as Figure 4 As shown, the mounting hole can be set as a smooth hole, and the positioning rod 2 is provided with an external thread structure that passes through the mounting hole. At the same time, a clamping nut 10 is provided for the positioning rod 2. The clamping nut 10 is connected to the external thread structure at the mounting hole where the positioning rod 2 passes through. Correspondingly, a stop structure is also provided on the positioning rod 2. The stop structure here can be defined as an internal stop structure. The internal stop structure cooperates with the clamping nut 10 to fix the positioning rod 2 on the measuring section 102.

[0043] In this case, if it is necessary to adjust the distance between the positioning probe 5 and the measuring segment 102, it can be achieved by adding or subtracting adjusting shims 11. Specifically, for example... Figure 4 As shown, the position-adjustable connection structure includes multiple adjusting shims 11. The adjusting shims 11 can be fitted between the inner stop structure and the mounting hole, so that the connection position between the positioning rod 2 and the mounting hole can be changed by changing the number of the fitted adjusting shims 11, thereby adjusting the distance between the positioning probe 5 and the measuring section 102.

[0044] In other embodiments, the position-adjustable connection structure may also refer to other embodiments of the height-adjustable connection structure described above, such as a connection structure fixed with a set screw or a connection structure based on a lead screw and nut mechanism, which will not be described in detail here.

[0045] Furthermore, to facilitate operation and reading by staff, in the preferred embodiment, such as Figure 4 As shown, measuring gauge 3 is located above positioning rod 2.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for measuring the raceway angle difference of a crossed cylindrical roller bearing, characterized in that, The device includes a base with a reference plane for supporting the bearing under test. A measuring arm is connected to the base, and the measuring arm has a measuring section at a set angle to the reference plane. The set angle is equal to the design angle between the raceway surface and the end face of the bearing under test. The measuring section is equipped with a positioning rod and a measuring gauge at a set distance from the positioning rod in the extension direction of the measuring section. The positioning rod is perpendicular to the measuring section and has a positioning probe that contacts the raceway surface during use. The measuring gauge is used to measure the distance difference between the measuring point on the raceway surface and the contact point between the positioning probe and the raceway surface in the direction perpendicular to the raceway surface. The raceway angle difference is calculated by the distance difference and the set distance.

2. The cross-cylindrical roller bearing raceway angle difference measuring device according to claim 1, characterized in that, The measuring instrument has a measuring probe that contacts the raceway surface during use so that the contact point constitutes the measuring point.

3. The measuring device for the raceway angle difference of a crossed cylindrical roller bearing according to claim 1, characterized in that, The measuring arm also has a vertical section, which is connected to the base.

4. The cross-cylindrical roller bearing raceway angle difference measuring device according to claim 3, characterized in that, The base is provided with a connection hole, through which the vertical section passes to connect with the base. The vertical section is equipped with a height-adjustable connection structure, so that the connection position between the vertical section and the connection hole can be changed by adjusting the height-adjustable connection structure, thereby adjusting the height of the measuring section.

5. The cross-cylindrical roller bearing raceway angle difference measuring device according to claim 4, characterized in that, The connecting hole is a smooth hole. The vertical section has an external thread structure that passes through the connecting hole from top to bottom. The vertical section is equipped with a lock nut connected to the external thread structure and an upper stop structure that protrudes radially outward from the external thread structure. The upper stop structure is located above the connecting hole. The vertical section is fixed to the base by the cooperation of the lock nut and the upper stop structure. The height-adjustable connecting structure includes multiple adjusting shims. The adjusting shims can be fitted between the upper stop structure and the connecting hole. The connection position between the vertical section and the connecting hole can be changed by changing the number of adjusting shims.

6. The measuring device for the raceway angle difference of a crossed cylindrical roller bearing according to any one of claims 1-5, characterized in that, The measuring section is provided with mounting holes, and the positioning rod passes through the mounting holes to connect with the measuring section. The positioning rod is equipped with a position-adjustable connection structure, so that the connection position between the positioning rod and the mounting hole can be changed by adjusting the position-adjustable connection structure, thereby adjusting the distance between the positioning probe and the measuring section.

7. The cross-cylindrical roller bearing raceway angle difference measuring device according to claim 6, characterized in that, The mounting hole is a smooth hole, and the positioning rod has an external thread structure that passes through the mounting hole. The positioning rod is equipped with a clamping nut connected to the external thread and an inner stop structure that protrudes radially outward from the external thread structure. The positioning rod is fixed on the measuring section by the cooperation of the clamping nut and the inner stop structure. The position adjustable connection structure includes multiple adjusting shims. The adjusting shims can be fitted between the inner stop structure and the mounting hole, so that the connection position between the positioning rod and the mounting hole can be changed by changing the number of adjusting shims fitted.

8. The measuring device for the raceway angle difference of a crossed cylindrical roller bearing according to any one of claims 1-5, characterized in that, The measuring instrument is located on the upper side of the positioning rod.

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