Auxiliary tool for measuring clearance of tapered roller bearing

Abstract

The utility model discloses an auxiliary tool for measuring the clearance of a tapered roller bearing, which relates to the technical field of mechanical assembly detection and comprises a positioning sleeve, two displacement sensors, a guide shaft, a sliding sleeve, a trigger switch and a hanging ring. The external thread end of the guide shaft is screwed into the internal thread end of the positioning sleeve, the lower end of the spring abuts against the end face of the positioning sleeve and is fastened and loosened through the screw, the trigger switch is installed at the upper end of the guide shaft through the screw and the support, and the hanging ring is installed at the top of the guide shaft and used for hanging the detection device. The system errors of the measurement systems can be mutually offset, equivalently zero point calibration is carried out constantly, system error accumulation of the two sets of measurement systems is avoided, zero point calibration does not need to be carried out frequently, and errors generated due to the fact that zero points are not calibrated in time in the using process are avoided.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly and testing technology, specifically an auxiliary tool for measuring the clearance of tapered roller bearings. Background Technology

[0002] In back-to-back assembly applications of tapered roller bearings, the dimensional fit accuracy of the bore system and shaft system, composed of components such as the tapered roller bearing, housing, drive shaft, and gland, is crucial. To ensure smooth shaft system operation, the fit deviation between the total bore dimension H00 and the total shaft dimension h00 must be within a small range (generally within 0.02mm), and different operating conditions require interference, transition, and clearance fits. However, due to cost control requirements, the dimensional deviations of each component are relatively large, and the cumulative deviations of the bore H00 and shaft h00 dimensions after assembly cannot meet the fit accuracy requirements.

[0003] Currently, the conventional testing method uses two testing systems: one to measure the distance between the inner ring end face of the tapered roller bearing and the drive shaft end face, and the other to measure the distance between the shoulder of the inner ring end face of the pressure cap and the bottom surface of the adjusting shim. This method suffers from the problem of accumulated systematic errors, requiring frequent zero-point calibration. Otherwise, errors can easily occur during use due to failure to calibrate the zero point in a timely manner. Moreover, using two testing systems is costly and relatively complex to operate.

[0004] Therefore, those skilled in the art have provided an auxiliary tool for measuring the clearance of tapered roller bearings to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide an auxiliary tool for measuring the clearance of tapered roller bearings, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An auxiliary tool for measuring the clearance of tapered roller bearings includes a positioning sleeve, displacement sensors, a guide shaft, a sliding sleeve, a trigger switch, and a lifting ring. The positioning sleeve serves as the base of the device. Two displacement sensors are mounted on the positioning sleeve using screws and brackets. The probes of the displacement sensors extend and retract to measure the displacement change between the positioning surface of the positioning sleeve and the displacement sensors. The external thread end of the guide shaft is screwed into the internal thread end of the positioning sleeve, and the lower end of a spring rests against the end face of the positioning sleeve. Tightening and loosening are achieved by screws. The sliding sleeve can slide a distance S along the guide shaft. The small inner hole of the sliding sleeve slides in contact with the guide shaft, and the inner diameter of the spring is fitted onto the guide shaft. The outer diameter of the spring is inserted into the large inner hole of the sliding sleeve, and the upper end face of the spring rests on the bottom surface of the large inner diameter of the sliding sleeve. In the free state, the upper end face of the sliding sleeve rests on the positioning surface of the guide shaft. The trigger switch is installed on the upper end of the guide shaft by screws and brackets. The gap G between the sensing surface of the trigger switch and the trigger surface of the sliding sleeve is less than the sensing distance of the trigger switch. When the positioning surface of the positioning sleeve presses on the upper end face of the outer ring of the tapered roller bearing, the sliding sleeve is pressed down so that it moves down S relative to the guide shaft. The displacement sensor probe rests on the top of the pressure cap. The sensing area S of the trigger switch overlaps with the trigger surface S of the sliding sleeve, and the trigger switch is triggered. The lifting ring is installed on the top of the guide shaft for suspending the detection device.

[0008] As a further improvement of this invention: the measurement data of the displacement sensor is recorded and processed by the control system, and the control system calculates the average value of the measurement data of the two displacement sensors as the measurement result.

[0009] As a further improvement of this utility model, the sliding fit accuracy between the sliding sleeve and the guide shaft meets the measurement accuracy requirements, ensuring the accuracy of the sliding displacement S of the sliding sleeve along the guide shaft.

[0010] As a further improvement of this utility model, the sensing accuracy of the trigger switch is sufficient to accurately detect the displacement of the sliding sleeve, ensuring that the displacement sensor is triggered to work at the appropriate position.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. High measurement accuracy: This method uses the same set of measuring devices for two measurements, and the systematic errors of the measuring system can cancel each other out. This is equivalent to zero-point calibration in real time, avoiding the accumulation of systematic errors of the two sets of measuring systems (one set measures the distance from the bearing end face to the shaft end, and the other set measures the depth of the gland). It does not require frequent zero-point calibration and avoids errors caused by failure to calibrate the zero point in time during use.

[0013] 2. Low cost: This method only requires one measurement system and a total of 2 displacement sensors, which reduces the number of displacement sensors and data acquisition system by 2 compared with 2 detection systems;

[0014] 3. Convenient to use: This patented method collects the relative change values ​​of two measurements and compares them with the two absolute values ​​measured by two sets of measurement systems (requiring two sets of zero-point calibration standard samples), eliminating the need for frequent zero-point calibration of the measurement system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an auxiliary tool for measuring the clearance of tapered roller bearings.

[0016] Figure 2 for Figure 1 AA cross-section view.

[0017] Figure 3 This is a schematic diagram of the load detection state.

[0018] Figure 4 This is a schematic diagram of the no-load detection state.

[0019] Figure 5 This is a schematic diagram of the detection status with added standard blocks.

[0020] In the diagram: Positioning sleeve-1; Displacement sensor-2; Sliding sleeve-3; Guide shaft-4; Trigger switch-5; Lifting ring-6. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figure 1-5This embodiment provides an auxiliary tool for measuring the clearance of tapered roller bearings, including a positioning sleeve 1, a displacement sensor 2, a guide shaft 4, a sliding sleeve 3, a trigger switch 5, and a lifting ring 6. The positioning sleeve 1 serves as the base of the device. Two displacement sensors 2 are mounted on the positioning sleeve 1 using screws and brackets. The probes of the displacement sensors 2 extend and retract to measure the displacement change between the positioning surface of the positioning sleeve 1 and the displacement sensor 2. The external thread end of the guide shaft 4 is screwed into the internal thread end of the positioning sleeve 1, and the lower end of the spring rests against the end face of the positioning sleeve 1. The screws are tightened and loosened, allowing the sliding sleeve 3 to slide down the guide shaft 4 by a displacement S. The small inner hole of the sliding sleeve 3 slides in conjunction with the guide shaft 4. The inner diameter of the spring is fitted onto the guide shaft 4, and the outer diameter of the spring is inserted into the large inner hole of the sliding sleeve 3. The upper end face of the spring rests against the bottom surface of the large inner diameter of the sliding sleeve 3. In a free state, the upper end face of the sliding sleeve 3 rests against the positioning surface of the guide shaft 4. The trigger switch 5 is secured by screws and brackets. Installed on the upper end of the guide shaft 4, the gap G between the sensing surface of the trigger switch 5 and the trigger surface of the sliding sleeve 3 is less than the sensing distance of the trigger switch 5. When the positioning surface of the positioning sleeve 1 presses on the upper end surface of the outer ring of the tapered roller bearing, the sliding sleeve 3 is pressed down so that it moves down S relative to the guide shaft 4. The probe of the displacement sensor 2 is on the top of the pressure cover. The sensing area S of the trigger switch 5 overlaps with the trigger surface S of the sliding sleeve 3, and the trigger switch 5 is triggered. The lifting ring 6 is installed on the top of the guide shaft 4 for hanging the detection device. The measurement data of the displacement sensor 2 is recorded and processed by the control system. The control system calculates the average value of the measurement data of the two displacement sensors 2 as the measurement result. The sliding fit accuracy between the sliding sleeve 3 and the guide shaft 4 meets the measurement accuracy requirements, ensuring the accuracy of the sliding displacement S of the sliding sleeve 3 along the guide shaft 4. The sensing accuracy of the trigger switch 5 can accurately detect the displacement of the sliding sleeve 3, ensuring that the displacement sensor 2 is triggered to work in the appropriate position.

[0023] Includes the following steps:

[0024] S1. Determine the total dimension H00 of the hole system from surface A to surface B, consisting of tapered roller bearing 1 (H01), lower housing (H02), upper housing (H03), and tapered roller bearing 2 (H04); using the lower end face (surface A) of the inner ring of tapered roller bearing 1 as a reference, determine the total dimension h00 of the shaft system from surface A to surface B, consisting of drive shaft (h01), adjusting shim (Δh), and gland (h02); clarify the fitting accuracy requirements between H00 and h00. When the dimensional deviation of each part is large, add an adjusting shim between surface C and surface D of the shaft system. The size of the adjusting shim is Δh = h + nP, and the difference between adjacent Δh sizes is P, where P is less than the maximum fitting deviation.

[0025] S2. Place the workpiece to be tested on the positioning reaction support plate so that the rollers of the tapered roller bearing are in close contact with the outer ring;

[0026] S3. Without adding washers between H surface (drive shaft) and G surface (pressure cover), using E surface (tapered roller bearing 2) as the reference, measure the height h11 of G surface. Specifically: Position the workpiece to be measured on the positioning reaction support plate, the support plate lifts the end face of the input (output) wheel 1, so that the roller of tapered roller bearing 1 is in contact with the inner conical surface of the outer ring; install the inner ring and rolling elements of tapered roller bearing 2; install the pressure cover; press the positioning surface of the positioning sleeve of the detection device coaxially onto the upper end face of the outer ring of tapered roller bearing 2; press down the sliding sleeve, so that it moves down by displacement S, and the positioning end face of the positioning sleeve fully presses against the pressure cover and the end face of the outer ring of tapered roller bearing 2. At this time, the probe of the displacement sensor is on the end face of the pressure cover; the sliding sleeve moves down and triggers the switch, the displacement sensor works, the control system records the values ​​of the two displacement sensors and calculates the average value, which is recorded as h11; lift the detection device to reset.

[0027] S4. Add a precision standard pad between the H surface and the G surface. The thickness of the precision standard pad is greater than the maximum value of the gap to be measured Δh, so that the pressure cap is raised.

[0028] S5. Using surface E as the reference again, measure the height h22 after surface G is raised. Specifically: remove the pressure cap, place a precision standard pad on the top of the drive shaft, and then reinstall the pressure cap; press the positioning surface of the positioning sleeve of the detection device coaxially onto the upper end face of the outer ring of the tapered roller bearing 2; press down the sliding sleeve to move it down by a displacement S, so that the positioning end face of the positioning sleeve fully presses against the pressure cap and the end face of the outer ring of the tapered roller bearing 2, and the probe of the displacement sensor is on the end face of the pressure cap; the sliding sleeve moves down and triggers the switch, the displacement sensor works, the control system records the values ​​of the two displacement sensors and calculates the average value, which is recorded as h22;

[0029] S6. Calculate the gap Δh between H surface and G surface. The formula is ΔL=h22-h11, Δh=L-ΔL=L-h22+h11, where L is the measured value of the precision standard pad.

[0030] S7. The control system displays the corresponding size adjustment pad based on Δh matching;

[0031] S8. Remove the pressure cap and precision standard pad, install the matching adjustment pad, and then install the pressure cap to complete the measurement and matching adjustment pad work.

[0032] Working principle:

[0033] 1. Installation and debugging of the testing device:

[0034] First, install the two displacement sensors 2 bodies on the positioning sleeve 1 with screws and brackets to ensure that the probes of the displacement sensors 2 can extend and retract flexibly and accurately measure the displacement change between the positioning surface of the positioning sleeve 1 and the displacement sensor 2. Slide the small inner hole of the sliding sleeve 3 onto the guide shaft 4, and slide the inner diameter of the spring onto the guide shaft 4. Insert the outer diameter of the spring into the large inner hole of the sliding sleeve 3 so that the upper end face of the spring abuts against the bottom surface of the large inner diameter of the sliding sleeve 3, ensuring that the upper end face of the sliding sleeve 3 abuts against the positioning surface of the guide shaft 4 in a free state. Screw the external thread end of the guide shaft 4 into the internal thread end of the positioning sleeve 1 so that the lower end of the spring abuts against the end face of the positioning sleeve 1. Then tighten and loosen with screws to ensure that the sliding sleeve 3 can slide down the guide shaft 4 with a displacement S. Install the trigger switch 5 on the upper end of the guide shaft 4 with screws and brackets. Adjust the gap G between the sensing surface of the trigger switch 5 and the trigger surface of the sliding sleeve 3 to be less than the sensing distance of the trigger switch 5. Finally, install the lifting ring 6 on the top of the guide shaft 4 to facilitate the hanging and movement of the detection device.

[0035] 2. Measurement process:

[0036] Placement of the workpiece to be tested: Position the workpiece to be tested on the positioning reaction support plate. The support plate lifts the end face of the input (output) wheel 1. Under the action of the gravity of the workpiece to be tested, ensure that the roller of the tapered roller bearing 1 is in contact with the outer ring of its inner conical surface. Install the inner ring and rolling elements of the tapered roller bearing 2, and then install the cover of the workpiece to be tested.

[0037] First measurement: Hold the sliding sleeve 3 and press the positioning surface of the positioning sleeve 1 of the detection device coaxially onto the upper end face of the outer ring of the tapered roller bearing 2. Press down the sliding sleeve 3 by hand, and the sliding sleeve 3 moves down by a displacement S. The positioning end face of the positioning sleeve 1 fully presses against the end face of the outer ring of the tapered roller bearing 2 on the pressure cover. At this time, the probes of the two displacement sensors 2 are on the end face of the pressure cover. The sliding sleeve 3 moves down and triggers the switch 5. The displacement sensors 2 are triggered to work. The control system records the current values ​​of the two displacement sensors 2, calculates the average value of the measurement data of the two sensors, and records it as h11. Hold up the detection device to the original position and the measuring device is reset.

[0038] Add a precision standard pad: Remove the pressure cap for later use, place the precision standard pad on top of the drive shaft of the workpiece to be tested, and then put in the spare pressure cap that was removed in the previous step;

[0039] Second measurement: Hold the sliding sleeve 3 and press the positioning surface of the positioning sleeve 1 of the detection device coaxially onto the upper end face of the outer ring of the tapered roller bearing 2. Press down the sliding sleeve 3 by hand, and the sliding sleeve 3 moves down by a displacement S. The positioning end face of the positioning sleeve 1 fully presses against the end face of the outer ring of the tapered roller bearing 2 on the pressure cover. The probes of the two displacement sensors 2 are on the end face of the pressure cover. The sliding sleeve 3 moves down and triggers the trigger switch 5. The displacement sensors 2 are triggered to work. The control system records the current values ​​of the two displacement sensors 2, calculates the average value of the measurement data of the two sensors, and records it as h22.

[0040] Calculate the gap and match the adjustment pad: The control system calculates the gap Δh between the H surface and the G surface according to the formula ΔL=h22-h11, Δh=L-ΔL=L-h22+h11, where L is the measured value of the precision standard pad. The control system matches and displays the corresponding size adjustment pad according to Δh.

[0041] Install the adjustment shim: Remove the pressure cap again for later use, remove the precision standard shim, install the adjustment shim that has been matched to the correct size by the control system, and finally install the pressure cap that has been removed for later use to complete the measurement and matching of the adjustment shim.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An auxiliary tool for measuring the clearance of tapered roller bearings, characterized in that, The device includes a positioning sleeve (1), a displacement sensor (2), a guide shaft (4), a sliding sleeve (3), a trigger switch (5), and a lifting ring (6). The positioning sleeve (1) serves as the base of the device. There are two displacement sensors (2), whose bodies are mounted on the positioning sleeve (1) by screws and brackets. The probe of the displacement sensor (2) extends and retracts to measure the displacement change between the positioning surface of the positioning sleeve (1) and the displacement sensor (2). The external thread end of the guide shaft (4) is screwed into the internal thread end of the positioning sleeve (1). The lower end of the spring rests on the end face of the positioning sleeve (1). The screws are tightened and loosened, and the sliding sleeve (3) can slide down the guide shaft (4) by a displacement S. The small inner hole of the sliding sleeve (3) slides in cooperation with the guide shaft (4). The inner diameter of the spring is fitted on the guide shaft (4), and the outer diameter of the spring is... Insert the sliding sleeve (3) into the large inner hole, the upper end face of the spring rests on the bottom surface of the large inner diameter of the sliding sleeve (3), and in the free state, the upper end face of the sliding sleeve (3) rests on the positioning surface of the guide shaft (4). The trigger switch (5) is installed on the upper end of the guide shaft (4) by screws and brackets. The gap G between the sensing surface of the trigger switch (5) and the trigger surface of the sliding sleeve (3) is less than the sensing distance of the trigger switch (5). When the positioning surface of the positioning sleeve (1) presses on the upper end face of the outer ring of the tapered roller bearing, the sliding sleeve (3) is pressed down so that it moves down S relative to the guide shaft (4). The probe of the displacement sensor (2) rests on the top of the pressure cap. The sensing area S1 of the trigger switch (5) overlaps with the trigger surface S2 of the sliding sleeve (3). The trigger switch (5) is triggered. The lifting ring (6) is installed on the top of the guide shaft (4) for hanging the detection device.

2. The auxiliary tool for measuring the clearance of tapered roller bearings according to claim 1, characterized in that, The measurement data of the displacement sensor (2) is recorded and processed by the control system, and the control system calculates the average value of the measurement data of the two displacement sensors (2) as the measurement result.

3. The auxiliary tool for measuring the clearance of tapered roller bearings according to claim 1, characterized in that, The sliding fit between the sliding sleeve (3) and the guide shaft (4) meets the measurement accuracy requirements, ensuring the accuracy of the sliding displacement S of the sliding sleeve (3) along the guide shaft (4).

4. The auxiliary tool for measuring the clearance of tapered roller bearings according to claim 1, characterized in that, The sensing accuracy of the trigger switch (5) can accurately detect the displacement of the sliding sleeve (3), ensuring that the displacement sensor (2) is triggered to work in the appropriate position.

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