Device and method for measuring pre-tightening force and pre-tightening interval of angular contact bearing

Abstract

The invention relates to the technical field of bearing pre-tightening force loading, and discloses an angular contact bearing pre-tightening force and pre-tightening interval measuring device and method.The measuring device comprises a support, a positioning assembly, a force applying assembly and a measurer, the support comprises a plurality of clamping rods distributed on the support in the circumferential direction, and angular contact bearing placement positions are formed between the opposite ends of the clamping rods; wherein each clamping rod is adjustable along the radial position of the angular contact bearing, the force application assembly comprises a pressure plate, a pressure rod and a plurality of pressure columns, each pressure column can abut against the same end face of an inner ring of the angular contact bearing, a pressure sensor is arranged on the pressure plate, and the pressure rod is movably arranged on the support along the axial direction of the angular contact bearing and is in compression joint with the pressure sensor. The measurer is arranged on the support and used for measuring the end face height of an outer ring of the angular contact bearing and the end face height of an inner ring of the angular contact bearing. The pre-tightening force of any design parameter is converted into the corresponding pre-tightening interval under non-actual assembly, and the pre-tightening interval is used for the actual assembly link.

Description

Technical Field

[0001] This invention relates to the field of bearing preload loading technology, and in particular to a measuring device and method for measuring the preload and preload interval of angular contact bearings. Background Technology

[0002] Precision shaft systems, as core functional components of servo mechanisms, are a crucial factor affecting the pointing accuracy of servo systems. Bearings, as core components of precision shaft systems, are closely related to the accuracy of the shaft system, and bearing preload technology is one of the core technologies for achieving high-precision shaft systems. The application of bearing preload significantly impacts the natural frequency, vibration, and stiffness of the shaft system. Applying appropriate preload can effectively improve the natural frequency and stiffness of the shaft system, reduce vibration, and thus maximize the potential of the shaft system. Currently, bearing preload methods mainly employ positioning preload and constant pressure preload. Since the magnitude of the preload cannot be measured in real time during actual assembly, positioning preload is generally used for adjustment. However, in the design phase, all theoretical calculations and analyses use preload parameters, leading to a mismatch between design parameters and assembly / adjustment parameters, making it impossible to implement the theoretical design in actual assembly. Furthermore, due to space constraints in actual products, it is difficult to accurately measure the bearing positioning preload interval in real time, resulting in the design interval not being accurately achieved during assembly / adjustment. Summary of the Invention

[0003] Based on the above, the purpose of this invention is to provide a measuring device and method for the preload and preload interval of angular contact bearings, so as to convert the preload of any design parameter into the corresponding preload interval under non-actual assembly conditions for use in actual assembly.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A measuring device for the preload and preload interval of a contact bearing, comprising:

[0006] support;

[0007] The positioning assembly includes a plurality of clamping rods, which are circumferentially distributed on the bracket. An angular contact bearing placement position is formed between the opposite ends of the plurality of clamping rods. The angular contact bearing placement position is used to limit and support the outer ring of the angular contact bearing. The radial position of each clamping rod is adjustable along the angular contact bearing.

[0008] The force-applying assembly includes a pressure plate, a pressure rod, and several pressure columns circumferentially distributed on the pressure plate. Each pressure column can press against the same end face of the inner ring of the angular contact bearing. A pressure sensor is provided on the pressure plate, and the pressure sensor is directly opposite the axis of the angular contact bearing. The pressure rod is movably mounted on the bracket along the axial direction of the angular contact bearing and presses against the pressure sensor.

[0009] A measuring instrument, mounted on the bracket, is used to measure the end face height of the outer ring of the angular contact bearing and the end face height of the inner ring of the angular contact bearing.

[0010] As a preferred embodiment of a measuring device for the preload and preload interval of a contact bearing, each clamping rod includes a rod portion and a clamping portion. The rod portion is radially movable on the bracket along the angular contact bearing. The clamping portion is located at one end of the rod portion. The clamping portion includes a vertically arranged side plate and a bottom plate. The side plate is attached to the outer ring sidewall of the angular contact bearing, and the bottom plate is attached to one end face of the outer ring of the angular contact bearing.

[0011] As a preferred embodiment of a measuring device for contact bearing preload and preload interval, the clamping rods are provided in three parts, with equal spacing between any two adjacent clamping rods.

[0012] As a preferred embodiment of a measuring device for contact bearing preload and preload interval, three pressure columns are provided, and the three pressure columns are evenly distributed on the pressure plate.

[0013] As a preferred embodiment of a measuring device for the preload and preload interval of a contact bearing, each of the pressure columns is adjustablely positioned on the pressure plate in a direction parallel to the radial direction of the angular contact bearing.

[0014] As a preferred embodiment of a measuring device for the preload and preload interval of a contact bearing, the pressure plate is provided with a plurality of adjusting grooves, the length direction of each adjusting groove being consistent with the radial direction of the angular contact bearing, each pressure column including a support rod, a pressure block located at one end of the support rod, and a locking member connected to the support rod, each support rod movingly passing through one of the adjusting grooves, the pressure block pressing against one end face of the inner ring of the angular contact bearing, and the locking member used to lock the support rod to fix the position of the support rod.

[0015] As a preferred embodiment of a measuring device for contact bearing preload and preload interval, the pressure plate includes a central disc portion and a mounting portion extending radially outward along the central disc portion, with an adjusting groove provided on each mounting portion.

[0016] As a preferred embodiment of a measuring device for contact bearing preload and preload interval, the pressure rod includes a screw, and the bracket has a threaded hole, with the screw engaging with the threaded hole.

[0017] As a preferred embodiment of a measuring device for measuring the preload and preload interval of a contact bearing, the device further includes a measuring frame disposed on the support. The measuring frame includes a support rod extending along a first direction, which is parallel to the axial direction of the angular contact bearing. The measuring instrument is adjustablely disposed on the support rod along the length direction of the support rod.

[0018] A method for measuring the preload and preload interval of an angular contact bearing, based on the measuring device for the preload and preload interval of an angular contact bearing described in any of the above technical solutions, the measuring method comprising:

[0019] The angular contact bearing to be tested is placed in the bracket, and the angular contact bearing to be tested is limited and supported at the angular contact bearing placement position by adjusting several of the clamping rods;

[0020] The pressure plate is placed above the angular contact bearing, such that the plurality of pressure columns press against the same end face of the inner ring of the angular contact bearing;

[0021] By moving the pressure rod to apply force to the pressure plate, the pressure column applies force to the inner ring of the angular contact bearing until the value of the pressure sensor reaches a first preset value, the first preset value being a first preload force;

[0022] The height difference between the outer ring end face and the inner ring end face of the angular contact bearing is measured by the measuring instrument, which is the first preload interval;

[0023] Record the first preload force and its corresponding first preload interval;

[0024] The pressure bar was moved and measured multiple times, and multiple sets of preload and corresponding preload intervals were recorded.

[0025] The beneficial effects of this invention are as follows:

[0026] This invention provides a measuring device for the preload and preload interval of angular contact bearings. The device includes a support, a positioning assembly, a force application assembly, and a measuring instrument. The positioning assembly supports the outer ring of the angular contact bearing to be measured, stabilizing its position and facilitating subsequent application of preload. A force application rod acts on a pressure sensor, and the force is transmitted to the end face of the inner ring of the angular contact bearing through a pressure plate and a pressure column. The pressure sensor detects the applied preload in real time, enabling accurate loading of any preload. The measuring instrument measures the height difference between the end faces of the angular contact bearing to obtain the preload interval under any preload, thus establishing the correspondence between any preload and preload interval, which can be applied to actual assembly processes. This measuring device has a simple structure, is easy to operate, and provides accurate and reliable preload loading. It allows for the conversion of preload with any design parameters into a corresponding preload interval for use in actual assembly processes, even outside of actual assembly.

[0027] The present invention also provides a method for measuring the preload and preload interval of angular contact bearings, which enables the conversion of preload with any design parameter into the corresponding preload interval under non-actual assembly conditions for use in actual assembly. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the measuring device for the preload and preload interval of an angular contact bearing from one perspective, provided in an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the structure of the measuring device for the preload and preload interval of an angular contact bearing, provided in another perspective according to an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of the measuring device for the preload and preload interval of an angular contact bearing from another perspective, provided in an embodiment of the present invention.

[0032] Figure 4 This is an exploded view of the measuring device for measuring the preload and preload interval of an angular contact bearing from one perspective, provided in an embodiment of the present invention.

[0033] In the picture:

[0034] 1. Bracket; 2. Positioning assembly; 21. Clamping rod; 211. Rod section; 212. Clamping part; 2121. Side plate; 2122. Base plate; 213. Operating head; 3. Force application assembly; 31. Pressure plate; 310. Adjusting slide; 32. Pressure rod; 33. Pressure column; 331. Support rod; 332. Pressure block; 333. Locking element; 34. Pressure sensor; 4. Measuring instrument; 5. Measuring frame; 51. Support rod;

[0035] 100, angular contact bearing; 101, outer ring; 102, inner ring. Detailed Implementation

[0036] 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 invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0040] like Figures 1 to 4 As shown, this embodiment of the invention provides a measuring device for the preload and preload interval of an angular contact bearing. The measuring device includes a bracket 1, a positioning component 2, and a force application component 3. The positioning component 2 supports the angular contact bearing 100 to be tested, and then the force application component 3 applies the preload of the design parameter. The measuring device 4 measures the preload interval corresponding to the design parameter preload, thereby achieving accurate loading of the preload of the angular contact bearing 100 and accurate real-time measurement of the preload interval in non-actual assembly conditions, thus providing guidance for actual assembly.

[0041] Specifically, such as Figure 4 As shown, the bracket 1 is a cylindrical structure with one open end facing downwards. The sidewalls of the cylindrical structure preferably have several perforations, forming supporting sidewalls between adjacent perforations. For example, three supporting sidewalls are formed, evenly distributed circumferentially. The upper sealed end of the cylindrical structure preferably has several weight-reducing holes, for example, three weight-reducing holes evenly distributed at the upper sealed end. The bracket 1 is used to install the positioning component 2 and the force-applying component 3. With this structure, the bracket 1 is lightweight, low-cost, easy to manufacture, and has a relatively symmetrical structure with high stress stability. It also allows for clear observation of the internal structure through the side perforations, facilitating timely adjustments. Of course, in other embodiments, the bracket 1 can also have other structures, as long as they are suitable for the installation of the positioning component 2 and the force-applying component 3.

[0042] More specifically, such as Figures 2 to 4 As shown, the positioning component 2 includes several clamping rods 21, which are circumferentially distributed on the bracket 1. The opposite ends of the clamping rods 21 form angular contact bearing placement positions, which are used to limit and support the outer ring 101 of the angular contact bearing 100. Each clamping rod 21 is adjustable in radial position along the angular contact bearing 100. Preferably, three clamping rods 21 are provided, each mounted on a supporting sidewall, meaning the three clamping rods 21 are evenly distributed circumferentially, with equal spacing between adjacent clamping rods 21. This ensures uniform force on the angular contact bearing 100 and stable support, while also preventing over-constraint caused by too many clamping rods 21, which could affect the accuracy of the angular contact bearing 100 itself.

[0043] In this embodiment, each clamping rod 21 includes a rod portion 211 and a clamping portion 212. The rod portion 211 is radially movable on the bracket 1 along the angular contact bearing 100. For example, each rod portion 211 is movably mounted on a supporting side wall. The clamping portion 212 is located at the end of the rod portion 211 that extends into the bracket 1. The clamping portion 212 includes a side plate 2121 and a bottom plate 2122 that are vertically arranged. The side plate 2121 fits against the side wall of the outer ring 101 of the angular contact bearing 100, and the bottom plate 2122 fits against one end face of the outer ring 101 of the angular contact bearing 100. For example, when the open end of the bracket 1 is facing down, the bottom plate 2122 fits against the lower end face of the outer ring 101 of the angular contact bearing 100, while not contacting the inner ring 102 of the angular contact bearing 100. That is, the angular contact bearing 100 is supported by the three bottom plates 2122 and radially limited by the three side plates 2121. Before placing the angular contact bearing 100, adjust each clamping rod 21 to ensure sufficient space between the three clamping rods 21 to accommodate the angular contact bearing 100. Then, adjust each clamping rod 21 so that the angular contact bearing 100 is stably supported by the three clamping rods 21 in the middle position of the bracket 1. The operation is simple and quick, with high clamping stability. At the same time, it will not cause excessive constraint on the angular contact bearing 100, affecting its own accuracy and measurement accuracy. Furthermore, the adjustable rod 211 can be adapted to various models and sizes of angular contact bearings 100, making it highly practical.

[0044] For example, each support sidewall is provided with a connecting screw hole, the axial direction of the connecting screw hole being aligned with the radial direction of the angular contact bearing 100. Each rod portion 211 has an external connecting thread on its outer periphery, which engages with the threaded connecting screw hole. By screwing the rod portion 211, the extension or retraction of the rod portion 211 relative to the support sidewall can be adjusted, i.e., moving it closer to or further away from the angular contact bearing 100. Of course, in other embodiments, the rod portion 211 can also be telescopic, allowing the position of the clamping portion 212 at the end of the rod portion 211 to be adjustable along the radial direction of the angular contact bearing 100. For example, the rod portion 211 may include several sleeved arms, specifically configured according to actual needs.

[0045] Preferably, the other end of the rod 211 is provided with an operating head 213, which makes it easy for the operator to hold the operating head 213 and turn the rod 211.

[0046] Furthermore, such as Figure 1 and Figure 4As shown, the force application component 3 includes a pressure plate 31, a pressure rod 32, and several pressure columns 33 circumferentially distributed on the pressure plate 31. Each pressure column 33 can press against the same end face of the inner ring 102 of the angular contact bearing 100. A pressure sensor 34 is provided on the pressure plate 31, and the pressure sensor 34 is directly opposite the axis of the angular contact bearing 100. The pressure rod 32 is movably mounted on the bracket 1 along the axial direction of the angular contact bearing 100 and is pressed against the pressure sensor 34. The pressure sensor 34 can optionally be electrically connected to an external display device. After the angular contact bearing 100 is positioned in its limiting support position, the pressure plate 31 is placed on the angular contact bearing 100, so that the pressure column 33 presses against the upper end face of the inner ring 102 of the angular contact bearing 100, and one end of the pressure rod 32 is aligned with the pressing surface of the pressure sensor 34 on the pressure plate 31, applying force to the pressure rod 32, causing the pressure rod 32 to exert downward force, which is then applied downward to the inner ring 102 of the angular contact bearing 100 through the pressure column 33, i.e., applying preload. The magnitude of the preload is detected in real time by the pressure sensor 34, achieving precise loading and arbitrary loading of the preload. Preferably, there are three pressure columns 33, which are evenly distributed on the pressure plate 31, corresponding one-to-one with the three clamping rods 21.

[0047] For example, the pressure rod 32 includes a screw, and the bracket 1 has a threaded hole. For instance, the upper closed end of the bracket 1 has a through threaded hole, and the screw is connected to the threaded hole. By turning the screw, the pressure rod 32 can be adjusted up and down. That is, when adjusted downwards, a downward preload is applied to the pressure plate 31, i.e., the inner ring 102 of the diagonal contact bearing 100. When adjusted upwards, the preload decreases or is completely removed. Of course, in other embodiments, the pressure rod 32 can also be adjusted in other ways, such as by a push rod, i.e., a push hole is provided on the bracket 1, and a push rod is applied to apply the preload.

[0048] Preferably, a handle is provided at one end of the pressure rod 32, so that the operator can easily turn the pressure rod 32 by the handle.

[0049] Preferably, each pressure post 33 is adjustablely positioned on the pressure plate 31 in a direction parallel to the radial direction of the angular contact bearing 100. By adjusting the position of the pressure post 33, each pressure post 33 is precisely pressed against the upper end face of the inner ring 102 of the angular contact bearing 100, while avoiding contact with the outer ring 101 of the angular contact bearing 100. This method is suitable for angular contact bearings 100 of various sizes, provides more precise preload loading, and has better practicality.

[0050] Specifically, the pressure plate 31 has several adjusting grooves 310, the length direction of each adjusting groove 310 being consistent with the radial direction of the angular contact bearing 100. Each pressure post 33 includes a support rod 331, a pressure block 332 located at one end of the support rod 331, and a locking member 333 connected to the support rod 331. Each support rod 331 moves through an adjusting groove 310. The pressure block 332 presses against one end face of the inner ring 102 of the angular contact bearing 100. The locking member 333 is used to lock the support rod 331 to fix its position. After the pressure plate 31 is placed above the angular contact bearing 100, each support rod 331 is slid so that each pressure block 332 is aligned with the inner ring 102 of the angular contact bearing 100. Then, the locking member 333 is locked to stabilize the support rod 331 and the pressure block 332 in this position. When measuring angular contact bearings 100 of different sizes, the sliding support rod 331 can adapt to angular contact bearings 100 of different diameters, making it easy to adjust and simple to operate.

[0051] For example, the locking element 333 is a locking nut, and the support rod 331 is a threaded rod. The locking nut is threadedly connected to the threaded rod, and the support rod 331 can be fixed or loosened by tightening the locking nut. Of course, in other embodiments, the locking element 333 can also be other structures, such as a pin, etc. The support rod 331 is provided with a plug-in hole. The support rod 331 can be fixed and loosened by inserting and pulling the pin into the plug-in hole on the support rod 331.

[0052] In this embodiment, the pressure plate 31 includes a central disc portion and a mounting portion extending radially outward from the central disc portion, with an adjustment groove 310 formed on each mounting portion. The pressure sensor 34 is fixed to the central disc portion. The overall structure is lightweight, avoiding interference with the measurement structure and facilitating observation of the relative position of each pressure block 332 and the angular contact bearing 100, thus preventing misalignment that could lead to incorrect measurement results.

[0053] Furthermore, the measuring device for the preload and preload interval of the angular contact bearing also includes a measuring frame 5, which is mounted on the support 1. The measuring frame 5 includes a support rod 51 extending along a first direction parallel to the axial direction of the angular contact bearing 100. The measuring instrument 4 is adjustablely positioned on the support rod 51 along its length. This facilitates the up-and-down movement of the measuring instrument 4, allowing it to be aligned with the upper end face of the outer ring 101 or inner ring 102 of the angular contact bearing 100, thereby measuring the preload interval of the outer ring 101 and inner ring 102 of the angular contact bearing 100 respectively. The measuring instrument 4 is connected to the support 1 via the measuring frame 5, resulting in better overall integrity of the measuring device for the preload and preload interval of the angular contact bearing, facilitating integrated transport and placement. It also ensures the relative stability of the measuring instrument 4 during measurement, guaranteeing reliable measurement results and avoiding errors caused by manual handling. Preferably, the measuring instrument 4 is a dial indicator.

[0054] For example, the measuring device 4 is slidably sleeved on the support rod 51, and can move up and down along the support rod 51 when under force, and is stable on the support rod 51 when not under force. Alternatively, the measuring device 4 is movably sleeved on the support rod 51, and two limiting nuts are threadedly connected to the support rod 51. The two limiting nuts are located above and below the measuring device 4, respectively, and the position of the measuring device 4 is fixed by the two limiting nuts.

[0055] This invention also provides a method for measuring the preload and preload interval of an angular contact bearing. This method is based on the aforementioned measuring device for the preload and preload interval of an angular contact bearing and specifically includes the following steps:

[0056] S1: Place the angular contact bearing 100 to be tested in the bracket 1, and limit and support the angular contact bearing 100 to be tested in the angular contact bearing placement position by adjusting several clamping rods 21;

[0057] First, the clamping rod 21 is moved radially outward. After the angular contact bearing 100 to be tested is placed between several clamping rods 21, the clamping rod 21 is moved radially inward so that the side plate 2121 of the clamping rod 21 abuts against the outer peripheral surface of the angular contact bearing 100, while the bottom plate 2122 of the clamping rod 21 supports the lower end face of the outer ring 101 of the angular contact bearing 100.

[0058] S2: Place the pressure plate 31 above the angular contact bearing 100, so that several pressure columns 33 press against the same end face of the inner ring 102 of the angular contact bearing 100.

[0059] For example, the pressure plate 31 can be inserted through the side cutout of the bracket 1, or the pressure plate 31 can be inserted before the angular contact bearing 100 is inserted into the bracket 1. The radial position of each pressure post 33 is adjusted so that the pressure block 332 of the pressure post 33 presses against the upper end face of the inner ring 102 of the angular contact bearing 100.

[0060] S3: By moving the pressure rod 32, force is applied to the pressure plate 31, so that the pressure column 33 applies force to the inner ring 102 of the diagonal contact bearing 100 until the value of the pressure sensor 34 reaches the first preset value, the first preset value is the first preload force;

[0061] Specifically, a preload is applied according to the first preload in the design parameters. The pressure value displayed by the pressure sensor 34 is used to adjust the pressure rod 32 in real time. The application of force is stopped when the pressure value reaches the first preload.

[0062] S4: The height difference between the end face of the outer ring 101 and the end face of the inner ring 102 of the angular contact bearing 100 is measured by the measuring device 4, which is the first preload interval.

[0063] The measuring device 4 is moved so that its measuring head is aligned with the upper end face of the outer ring 101 of the angular contact bearing 100 to obtain a first height value H1. Then the measuring device 4 is moved so that its measuring head is aligned with the upper end face of the inner ring 102 of the angular contact bearing 100 to obtain a second height value H2. The height difference between H1 and H2 is the first preload interval.

[0064] S5: Record the first preload force and its corresponding first preload interval;

[0065] S6: Move the pressure bar 32 multiple times and measure and record multiple sets of preload force F and their corresponding preload interval A.

[0066] By repeating steps S3 to S5, the preload intervals corresponding to different design parameters can be obtained, which can then be applied to actual assembly. For example, based on the preload interval, a shim of the corresponding thickness can be directly selected to ensure accurate loading of the preload during actual assembly.

[0067] The measuring device and method for measuring the preload and preload interval of angular contact bearings provided in this embodiment realizes the accurate loading of arbitrary preload on paired angular contact bearings 100 under non-assembly conditions, and the measurement of the bearing interval corresponding to the angular contact bearings 100 under arbitrary preload. That is, it realizes the conversion of arbitrary preload into corresponding preload interval, so that the design parameters can be used in the actual assembly process.

[0068] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A measuring device for the preload and preload interval of an angular contact bearing, characterized in that, include: support; The positioning assembly includes a plurality of clamping rods, which are circumferentially distributed on the bracket. An angular contact bearing placement position is formed between the opposite ends of the plurality of clamping rods. The angular contact bearing placement position is used to limit and support the outer ring of the angular contact bearing. The radial position of each clamping rod is adjustable along the angular contact bearing. The force-applying assembly includes a pressure plate, a pressure rod, and several pressure columns circumferentially distributed on the pressure plate. Each pressure column can press against the same end face of the inner ring of the angular contact bearing. A pressure sensor is provided on the pressure plate, and the pressure sensor is directly opposite the axis of the angular contact bearing. The pressure rod is movably mounted on the bracket along the axial direction of the angular contact bearing and presses against the pressure sensor. A measuring instrument, mounted on the bracket, is used to measure the end face height of the outer ring of the angular contact bearing and the end face height of the inner ring of the angular contact bearing.

2. The measuring device for the preload and preload interval of an angular contact bearing according to claim 1, characterized in that, Each of the clamping rods includes a rod portion and a clamping portion. The rod portion is radially movable on the bracket along the angular contact bearing. The clamping portion is located at one end of the rod portion. The clamping portion includes a vertically arranged side plate and a bottom plate. The side plate is attached to the outer ring sidewall of the angular contact bearing, and the bottom plate is attached to one end face of the outer ring of the angular contact bearing.

3. The measuring device for the preload and preload interval of an angular contact bearing according to claim 1, characterized in that, The clamps are provided in three parts, and the interval between each pair of adjacent clamps is equal.

4. The measuring device for the preload and preload interval of an angular contact bearing according to claim 1, characterized in that, There are three pressure columns, which are evenly distributed on the pressure plate.

5. The measuring device for the preload and preload interval of an angular contact bearing according to claim 1, characterized in that, Each of the pressure columns is adjustablely positioned on the pressure plate in a direction parallel to the radial direction of the angular contact bearing.

6. The measuring device for the preload and preload interval of an angular contact bearing according to claim 5, characterized in that, The pressure plate has several adjusting grooves, the length direction of each adjusting groove is consistent with the radial direction of the angular contact bearing, each pressure column includes a support rod, a pressure block located at one end of the support rod, and a locking member connected to the support rod. Each support rod moves through one adjusting groove, the pressure block presses against one end face of the inner ring of the angular contact bearing, and the locking member is used to lock the support rod to fix the position of the support rod.

7. The measuring device for the preload and preload interval of an angular contact bearing according to claim 6, characterized in that, The pressure plate includes a central disc portion and a mounting portion extending radially outward along the central disc portion, with an adjustment groove provided on each mounting portion.

8. The measuring device for the preload and preload interval of an angular contact bearing according to claim 1, characterized in that, The pressure rod includes a screw, and the bracket has a threaded hole, with the screw being connected to the threaded hole.

9. The measuring device for the preload and preload interval of an angular contact bearing according to claim 1, characterized in that, It also includes a measuring frame, which is mounted on the support. The measuring frame includes a support rod whose length extends along a first direction, which is parallel to the axial direction of the angular contact bearing. The measuring device is adjustablely mounted on the support rod along its length.

10. A method for measuring the preload and preload interval of an angular contact bearing, based on the measuring device for the preload and preload interval of an angular contact bearing as described in any one of claims 1-9, characterized in that, The measurement method includes: The angular contact bearing to be tested is placed in the bracket, and the angular contact bearing to be tested is limited and supported at the angular contact bearing placement position by adjusting several of the clamping rods; The pressure plate is placed above the angular contact bearing, such that the plurality of pressure columns press against the same end face of the inner ring of the angular contact bearing; By moving the pressure rod to apply force to the pressure plate, the pressure column applies force to the inner ring of the angular contact bearing until the value of the pressure sensor reaches a first preset value, the first preset value being a first preload force; The height difference between the outer ring end face and the inner ring end face of the angular contact bearing is measured by the measuring instrument, which is the first preload interval; Record the first preload force and its corresponding first preload interval; The pressure bar was moved and measured multiple times, and multiple sets of preload and corresponding preload intervals were recorded.

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