Device for measuring radial clearance of flexible bearing
By designing a radial clearance measuring device for flexible bearings, and utilizing components such as a chassis, a fixed base, a dial indicator, and a mandrel, stable and accurate measurement of the radial clearance of flexible bearings was achieved, solving the problem of inaccurate measurement in existing technologies.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ZHENHUA BEARING WORKS
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-08
AI Technical Summary
In the existing technology, the method for measuring the radial clearance of flexible bearings is greatly affected by human factors and is inaccurate, which cannot meet production requirements.
A flexible bearing radial clearance measuring device was designed, including a chassis, a fixed base, a dial indicator, a mandrel, a contact component, and a compression spring. Stable and accurate clearance measurement can be achieved by adjusting the axial movement of the mandrel and the contact between the contact component and the outer circle of the bearing under load.
This device eliminates the influence of human factors, provides stable and accurate measurement results, and is suitable for radial clearance detection of flexible bearings, meeting production requirements.
Smart Images
Figure CN224216015U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of clearance measurement devices, specifically relating to a device for measuring the radial clearance of flexible bearings. Background Technology
[0002] After the inner and outer rings and steel balls of the flexible bearing are assembled, it is necessary to check whether the radial clearance meets the requirements of the design drawings.
[0003] Currently, the main methods for detecting radial clearance in flexible bearings are:
[0004] Simple measurement method: After tightening the inner ring, zero the dial indicator and place it against the outer ring of the bearing. Manually push and pull the outer ring and directly read the reading as the radial clearance value.
[0005] General and special instrument testing: X092 testing instrument used for deep groove ball bearings.
[0006] Simple measurement results are unstable and greatly affected by human factors. General-purpose and specialized instruments are not suitable for testing flexible bearings, as the loading force cannot be adjusted, resulting in inaccurate results.
[0007] Existing methods for measuring the radial clearance of flexible bearings are no longer sufficient to meet production needs. There is an urgent need to design a new measuring tool to quickly and accurately measure the size of the radial clearance of flexible bearings. Utility Model Content
[0008] To solve the above-mentioned technical problems, this utility model proposes a device for measuring the radial clearance of flexible bearings.
[0009] This utility model is achieved through the following technical solution: a flexible bearing radial clearance measuring device, comprising a chassis, the surface of which is provided with clamp fixing holes, fixing seat fixing holes and base fixing holes from top to bottom;
[0010] The mounting base is fixed in the mounting hole position and is used to fix the flexible bearing to be tested;
[0011] The dial indicator has its probe fixed to the chassis via a clamp fixing hole, and its probe is pressed against the outer circle of the flexible bearing to be measured; the base is fixed in the base fixing hole; the base has an inner hole that penetrates through two opposite end faces;
[0012] The mandrel is clearance-fitted with the inner hole of the base and moves up and down along its axis under the action of external force; a fitting component is fixedly installed at the end of the mandrel facing the flexible bearing to be tested. Under the loaded state, the fitting component contacts the outer circle of the flexible bearing to be tested, and the virtual connection between the fitting component and the center of the dial indicator probe passes through the axis of the flexible bearing to be tested.
[0013] With the inner ring of the flexible bearing under test fixed, the outer ring rotates from its highest point to its lowest point, and the spindle moves axially. Adjusting the fit between the contacting component and the outer circle of the flexible bearing causes the dial indicator pointer to rotate; the change in its value is the required radial clearance.
[0014] According to this utility model, the outer periphery of the spindle that cooperates with the base is fitted with a compression spring, one end of which is fixed to the spindle and the other end is fixed to the inner wall of the inner hole of the base.
[0015] According to this utility model, a rotating bushing is provided at the end of the mandrel away from the aluminum sleeve; the rotating bushing and the compression spring work together to drive the mandrel to move axially.
[0016] According to this utility model, a rear baffle is fixedly connected to the end face of the base away from the fixed seat. The rear baffle is provided with a through hole for the mandrel to pass through, and the other end face of the rear baffle is engaged with the rotating bushing.
[0017] According to this utility model, the longitudinal section of the rear baffle is a right trapezoid, with one side of the plane connected to the base and the other side of the slope engaged with the rotating bushing. Correspondingly, the rotating bushing has a mating slope that matches the slope of the rear baffle. Under the loaded state, the two slopes are completely in contact; under the unloaded state, there is a gap between the two slopes.
[0018] According to this utility model, the outer circumferential surface of the rotating bushing is provided with a threaded hole, the axis of the threaded hole is perpendicular to the axis of the rotating bushing, and a bolt is fixedly connected in the threaded hole.
[0019] According to this utility model, the chassis has a clamp for fixing the dial indicator measuring rod at the clamp fixing hole, and the measuring rod is relatively fixed to the chassis by clamping the clamp.
[0020] According to this utility model, the base fixing holes are two vertically arranged rows of threaded holes, symmetrically arranged about the longitudinal axis of the chassis. The base has waist-shaped holes corresponding to the threaded holes on both sides. The fixing member passes through the waist-shaped holes and the threaded holes to fix the base to the chassis.
[0021] According to this utility model, the chassis is further provided with threaded holes on both sides symmetrical about its longitudinal axis at the upper position, which are used to adjust the height of the chassis so that the chassis surface is tilted at a certain angle and adjusted to a suitable working position.
[0022] According to this utility model, the bonding component is further described as an aluminum sleeve.
[0023] Compared with the prior art, the advantages of this utility model are: this device is easy to process and assemble, and convenient to use on the production site.
[0024] This device, compared with both simple measurement and dedicated instrument measurement methods, eliminates the influence of human factors, is suitable for radial clearance detection of flexible bearings, and ensures stable and accurate test results. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the flexible bearing radial clearance measuring device of this utility model;
[0026] Figure 2 This is a schematic diagram of the chassis of this utility model;
[0027] Figure 3 This is a schematic diagram of the installation of the flexible bearing to be tested and the fixed seat according to this utility model;
[0028] Figure 4a This is a first-view structural diagram of the base of this utility model;
[0029] Figure 4b This is a second-view structural diagram of the base of this utility model;
[0030] Figure 5 This is a schematic diagram of the connection structure between the mandrel and the aluminum sleeve of this utility model;
[0031] Figure 6a This is a first-view schematic diagram of the rear baffle of this utility model;
[0032] Figure 6b This is a second-view schematic diagram of the rear baffle of this utility model;
[0033] Figure 7a This is a first-view schematic diagram of the rotating bushing of this utility model.
[0034] Figure 7b This is a second-view schematic diagram of the rotating bushing of this utility model.
[0035] Figure 8a This is a schematic diagram of the loading state of this utility model;
[0036] Figure 8b This is a schematic diagram of the unloading state of this utility model.
[0037] Among them, 100-chassis, 110-clamp fixing hole, 120-fixed seat fixing hole, 130-base fixing hole, 140-threaded hole, 200-dial indicator, 300-base, 310-spindle, 320-aluminum sleeve, 330-compression spring, 340-slender hole, 400-clamp, 500-fixed seat, 600-fixed washer, 700-rear baffle, 800-rotating bushing, 810-bolt, 900-flexible bearing to be tested. Detailed Implementation
[0038] To facilitate understanding of the utility model's objectives and effects, the specific embodiments of the utility model are as follows, in conjunction with the accompanying drawings:
[0039] like Figure 1 The diagram shows a schematic of a flexible bearing radial clearance measuring device. This device is used to measure the radial clearance of flexible bearings on-site. It includes a base 100, which is a long strip plate. From top to bottom, it has a clamp fixing hole 110 for fixing a dial indicator 200, a fixing seat fixing hole 120 for fixing the flexible bearing 900 to be tested, and a base fixing hole 130. A base 300 is fixed to the base fixing hole 130. The base 300 has through holes penetrating both end faces, and a mandrel 310 is fitted into the through holes with clearance. The mandrel 310 can move along... The spindle 310 moves up and down axially. An aluminum sleeve 320 is fixedly installed at one end of the spindle 310 facing the flexible bearing 900 to be tested. The aluminum sleeve 320 contacts the lower outer circle of the flexible bearing 900 to be tested. The probe of the dial indicator 200 presses against the upper outer circle of the flexible bearing 900 to be tested, which is opposite to the lower outer circle. The virtual line connecting the center of the aluminum sleeve 320 and the probe of the dial indicator 200 passes through the center of the flexible bearing 900 to be tested. The spindle 310 is rotated to move along its axial direction, thereby adjusting the degree of contact between the aluminum sleeve 320 and the outer circle of the flexible bearing 900 to be tested. The dial indicator pointer 200 rotates, and the change in its value is the value of the required radial clearance.
[0040] Specifically, such as Figure 2 The diagram shows the structure of the chassis. A through hole for connecting the chuck 400 is located slightly above the center of the chassis 100. The measuring rod of the dial indicator 200 is fixed to the chassis 100 by the chuck 400. The position of the measuring head of the dial indicator 200 can be adjusted according to the position of the flexible bearing 900 to be tested. After adjustment, the chuck 400 is tightened with bolts. Three rows of threaded holes are located in the middle of the chassis 100 for connecting and fixing the mounting base 500 to the flexible bearing 900. After selecting a suitable mounting base 500, it is fixed to the chassis 100 with bolts. Two rows of threaded holes are located slightly below the chassis 100 for connecting the base 300. The base 300 has oblong holes 340 on both sides corresponding to the threaded holes, and bolts are used to pass through the oblong holes 340 and fix it to the chassis 100. The appropriate hole position can be selected according to the size of the flexible bearing 900 to be tested. If the diameter of the flexible bearing 900 to be tested is large, the threaded hole in the lower position is selected; if the diameter of the flexible bearing 900 to be tested is small, the threaded hole in the upper position is selected. The heights of the chuck 400 and the fixed base 500 are adjustable. By adjusting their heights, the probe of the dial indicator 200 is positioned precisely at the highest point of the outer ring of the flexible bearing 900 to be measured, thereby improving measurement accuracy and reducing measurement errors.
[0041] Furthermore, such as Figure 5The diagram shows the connection between the mandrel and the aluminum sleeve. The mandrel 310 is a stepped shaft. A compression spring 330 is fitted on the outer circumference of the shaft segment that mates with the inner hole of the base 300. This shaft segment is a stepped shaft. The compression spring 330 is fitted on the outer circumference of the shaft segment with a smaller diameter. One end of the compression spring 330 is fixedly connected to the end face of the shaft segment with a larger diameter, and the other end is fixedly connected to the inner hole of the base 300, thereby limiting the two ends of the compression spring 330 in the length direction. The end of the mandrel 310 away from the aluminum sleeve 320 is provided with a thread. This threaded segment is used to mate with the threaded hole of the rotating bushing 800 described below. The threaded connection between the two realizes the limitation of the mandrel 310 and the adjustment of the preload of the compression spring 330 according to the tightening length of the threads, thereby realizing the adjustment of the fit between the aluminum sleeve 320 and the outer circumference of the flexible bearing 900 to be tested.
[0042] like Figure 4a and Figure 4b As shown, the base is a structural schematic diagram from different perspectives. The end face of the base 300 away from the fixed seat 500 has a threaded hole for connecting the rear baffle 700, which is described in detail below.
[0043] like Figure 6a and Figure 6b As shown, the rear baffle 700 is a structural schematic diagram from different perspectives. The side surface of the rear baffle 700 corresponding to the base 300 is provided with threaded holes for connecting with the base 300, and a through hole for the spindle 310 to pass through is provided in the middle. The longitudinal section of the rear baffle 700 is a right trapezoid. One side of the flat surface is connected to the base 300, and a rotating bushing 800 is provided on the inclined side. The inclined surface is designed to facilitate the cooperation with the rotating bushing 800 described below.
[0044] like Figure 7a and 7b The diagram shows a schematic of the rotating bushing. The rotating bushing 800 has a central through hole for connecting the spindle 310. The tail of the spindle 310 passes through the central through hole and is locked by a nut. There is a clearance fit between the spindle 310 and the central through hole of the rotating bushing 800. Preferably, the tail of the spindle 310 passes through the central through hole and is locked by double nuts.
[0045] like Figure 8a and 8b The outer circumference of the rotating bushing 800 has a threaded through hole with an axis perpendicular to the axis of the rotating bushing 800. A bolt 810 is screwed into the threaded through hole and locked with a nut. By turning the bolt 810, a rotational force is applied to the rotating bushing 800.
[0046] One side surface of the rotating bushing 800 is formed with an inclined surface that matches the inclined surface of the rear baffle 700. Under load, this side surface is completely in contact with the inclined surface of the rear baffle 700, and the bolt 810 is perpendicular to the chassis 100. Under unload, there is a gap between this side surface and the inclined surface of the rear baffle 700, and the axis of the bolt 810 in this state forms a 90° angle with the axis of the bolt 810 in the load state. By rotating the bushing 800, the spindle 310 moves back and forth along its axis, changing the degree of contact between the aluminum sleeve 320 and the outer circle of the flexible bearing 900 to be tested.
[0047] like Figure 3 The diagram shows the structure of the fixed base and the chassis. The fixed base 500 is mounted on the chassis 100. The inner hole of the flexible bearing 900 to be tested is fitted onto the outer circle of the fixed base 500. The fixed base 500 has an arc groove at the corner to avoid the bearing chamfer. The fixing shim 600 is pressed on the inner ring end face of the flexible bearing 900 to be tested and fixed with bolts.
[0048] In the embodiments of this application, such as Figure 2 As shown, the chassis 100 is also provided with threaded holes 140 on both sides symmetrical about its longitudinal axis at the upper position, which are used to adjust the height of the chassis 100 so that the surface of the chassis 100 is tilted at a certain angle and adjusted to a suitable working position.
[0049] The working principle of this utility model is as follows:
[0050] Unloading operation: The thrust part moves from the loading position to the unloading position, turns the bolt 810, and drives the rotating bushing 800 to rotate, so that the inclined surface of the rotating bushing 800 and the inclined surface of the rear baffle 700 begin to move away, driving the spindle 310 and the aluminum sleeve 320 connected to it to move backward, and pressing the compression spring 330.
[0051] Loading operation: From the unloading position to the loading position, turn the bolt 810 and drive the rotating bushing 800 to rotate. The inclined surface of the rotating bushing 800 gradually approaches the inclined surface of the rear baffle 700. The compression spring 330 pushes the spindle 310 and the aluminum sleeve 320 connected to it to move forward, so that the nut drives the rotating bushing 800 to move forward until the inclined surface of the rotating bushing 800 is completely in contact with the inclined surface of the rear baffle 700.
[0052] Loading force adjustment: Adjust the position of the double nuts on the tail screw of the mandrel 310 to change the thrust of the compression spring 330. A force gauge is used to measure the loading force of the thrust section. Because the flexible bearing ring is relatively thin, the force gauge needs to be adjusted to a suitable value, and the force must be greater than the force measured by the dial indicator.
[0053] During use, select a suitable mounting base 500 according to the size of the flexible bearing 900 to be tested, and adjust the appropriate distance of the base 300. Fix the flexible bearing 900 to be tested to the mounting base 500, and adjust the height of the chuck 400 and the mounting base 500 so that the dial indicator 200 probe contacts the outer circular surface of the flexible bearing 900 to be tested. Then, use the fixing shim 600 to press the upper end face of the inner ring of the flexible bearing 900 to be tested. With the inner ring fixed, move the outer ring radially from one extreme position to the other extreme position by the maximum amount of movement, that is, from the highest point to the lowest point. At the rightmost extreme position of the outer ring, it is in the unloaded position, and the dial indicator 200 probe contacts the outer ring, while the aluminum sleeve 320 does not contact the outer ring of the flexible bearing 900. At the leftmost extreme position of the outer ring, it is in the loaded position, and the dial indicator 200 probe contacts the outer ring. Adjust the rotating bushing 800 so that the aluminum sleeve 320 contacts the outer ring of the flexible bearing 900 to be tested. During the process from unloading to loading, the maximum movement of the outer ring of the flexible bearing under test (900 mm), i.e. the change in the value of the dial indicator pointer rotation, is the value of the required radial clearance of the flexible bearing.
[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make several improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of this utility model are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model still fall within the scope of the technical solution of this utility model.
Claims
1. A device for measuring radial clearance of a flexible bearing, characterized in that, include, The chassis has, from top to bottom, a clamp fixing hole, a fixing seat fixing hole, and a base fixing hole; The mounting base is fixed in the mounting hole position and is used to fix the flexible bearing to be tested; The dial indicator has its probe fixed to the chassis via a clamp fixing hole, and its probe is pressed against the outer circle of the flexible bearing to be measured; the base is fixed in the base fixing hole; the base has an inner hole that penetrates through two opposite end faces; The mandrel, with a clearance fit to the inner hole of the base, moves up and down along its axis under external force. A contacting component is fixedly installed at the end of the mandrel facing the flexible bearing to be tested. Under load, the contacting component contacts the outer circle of the flexible bearing to be tested, and the virtual line connecting the center of the contacting component and the probe of the dial indicator passes through the axis of the flexible bearing to be tested. The inner ring of the flexible bearing to be tested is fixed, and the outer ring rotates from the highest point to the lowest point. The mandrel moves axially, and the degree of contact between the contacting component and the outer circle of the flexible bearing to be tested is adjusted, causing the dial indicator pointer to rotate. The change in its value is the required radial clearance value.
2. The flexible bearing radial clearance measuring device as described in claim 1, characterized in that, A compression spring is fitted around the outer periphery of the spindle that mates with the base. One end of the compression spring is fixed to the spindle, and the other end is fixed to the inner wall of the inner hole of the base.
3. The flexible bearing radial clearance measuring device as described in claim 2, characterized in that, A rotating bushing is provided at the end of the mandrel away from the aluminum sleeve; the rotating bushing and the compression spring work together to drive the mandrel to move axially.
4. The flexible bearing radial clearance measuring device as described in claim 3, characterized in that, A rear baffle is fixedly connected to the end face of the base away from the fixed seat. The rear baffle is provided with a through hole for the mandrel to pass through. The other end face of the rear baffle is connected to the rotating bushing.
5. The flexible bearing radial clearance measuring device as described in claim 4, characterized in that, The longitudinal section of the rear baffle is a right trapezoid, with one flat side connected to the base and the inclined side cooperating with the rotating bushing. Correspondingly, the rotating bushing has a matching inclined surface that matches the inclined surface of the rear baffle. Under load, the two inclined surfaces are completely in contact; under unload, there is a gap between the two inclined surfaces.
6. The flexible bearing radial clearance measuring device as described in claim 3, characterized in that, The outer circumferential surface of the rotating bushing is provided with a threaded hole, the axis of which is perpendicular to the axis of the rotating bushing, and a bolt is fixedly connected inside the threaded hole.
7. The flexible bearing radial clearance measuring device as described in claim 1, characterized in that, The chassis has a clamp fixedly connected to the clamp fixing hole for fixing the dial indicator measuring rod, and the measuring rod is relatively fixed to the chassis by clamping.
8. The flexible bearing radial clearance measuring device as described in claim 1, characterized in that, The base fixing holes are two vertically arranged rows of threaded holes, symmetrically arranged about the longitudinal axis of the chassis. The base has waist-shaped holes on both sides corresponding to the threaded holes. The fixing component passes through the waist-shaped holes and the threaded holes to fix the base to the chassis.
9. The flexible bearing radial clearance measuring device as described in claim 1, characterized in that, The chassis is also provided with threaded holes on both sides symmetrical about its longitudinal axis at the upper part, which are used to adjust the height of the chassis so that the chassis surface is tilted at a certain angle and adjusted to a suitable working position.
10. The flexible bearing radial clearance measuring device as described in claim 1, characterized in that, The bonding component is an aluminum sleeve.