Tapered bearing outer ring measuring device and measuring method

Abstract

This invention discloses a measuring device and method for measuring the outer ring of a tapered bearing, relating to the field of tapered bearing measurement technology. It includes a positioning mechanism, a clamping mechanism, and a measuring mechanism. The positioning mechanism includes a support column, a positioning pin, a lower base plate, and an upper base plate. The clamping mechanism includes an electric cylinder, a pressure head, a guide rod, and a new measuring head. The measuring mechanism includes a positioning block, an upper sensor, and a lower sensor. The method for measuring the outer ring of a tapered bearing includes the following steps: 1) The gearbox assembly is in place; 2) The clamping mechanism is activated; 3) The measuring mechanism is activated, the intermediate shaft is rotated, and the upper and lower sensors dynamically collect data from the bearing end face. After data processing, the measured value is obtained. This invention solves the problem in existing tapered bearing outer ring measuring devices and methods where the measuring head swings around the bushing, causing unstable measurement values ​​from the three sensors on the measuring head end face, resulting in errors.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and in particular to a measuring device and method for measuring the outer ring of the tapered bearing at both ends of the intermediate shaft of an automobile transmission. Background Technology

[0002] like Figure 1 A type of transmission assembly has a pair of tapered bearings 1-2 at both ends of the intermediate shaft 1-1. These tapered bearings require preload to improve their rotational accuracy, rigidity, and lifespan; therefore, shims are needed. Shim selection involves measuring the depth H2 between the outer ring of the tapered bearing 1-2 and the housing 1-3. Based on the relationship between depth and interference fit, tapered shaft shims are selected. For example... Figure 2 and Figure 3 As shown, the existing tapered bearing outer ring measuring device and method uses the housing end face as a reference for positioning. A probe is used to press the outer ring 1-2-1 of the tapered bearing against the housing. Three sensors 2-3 are fixed on the frame of the positioning reference surface. The three sensors act on the end face of the probe 2-1 of the existing measuring device. By rotating the intermediate shaft 1-1, the sensors dynamically collect data from the end face of the probe. The average value is taken, sorted, and then the middle 60% of the sorted data is used to calculate the average value. This measuring device is used on a measuring machine on the production line. During measurement, the measuring head swings around the bushing 2-4, causing the measurement values ​​of the three sensors on the end face of the probe to be unstable and resulting in errors. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a measuring device and method for measuring the outer ring of a tapered bearing. It can solve the problem that existing measuring devices and methods for measuring the outer ring of tapered bearings have problems such as the measuring head swinging around the bushing, which causes the three sensors on the end face of the measuring head to have unstable measurement values ​​and errors.

[0004] To solve the above problems, the technical solution of the present invention is: this tapered bearing outer ring measuring device includes a positioning mechanism, a clamping mechanism and a measuring mechanism.

[0005] The positioning mechanism includes a support column, a positioning pin, a lower base plate, and an upper base plate. The lower and upper base plates have through holes in their middle sections for the passage of components of the clamping and measuring mechanisms, as well as some fixing holes for securing the components. The lower and upper base plates are connected and supported by the support column. The bottom surface of the lower base plate serves as the reference surface for the positioning mechanism. The positioning pin is provided on the lower base plate corresponding to the positioning hole in the housing. By inserting the positioning pin into the positioning hole in the housing, the consistency of the sensor's measurement position is ensured.

[0006] The clamping mechanism includes an electric cylinder, a pressure head, a guide rod, and a new probe; the pressure head is installed at the end of the electric cylinder extension rod; the guide rod passes through the upper base plate and is connected to the new probe; during measurement, the electric cylinder acts on the guide rod through the pressure head, and the guide rod acts on the new probe to press the outer ring of the tapered bearing.

[0007] The measuring mechanism includes a positioning block, an upper sensor, a lower sensor, an upper sensor mounting bracket, and a lower sensor mounting bracket; the positioning block is mounted on the lower base plate corresponding to the corresponding part of the housing; the upper sensor is fixed on the upper base plate by the upper sensor mounting bracket, and its sensing end acts on the outer ring end face of the tapered bearing; the lower sensor is fixed on the lower base plate by the lower sensor mounting bracket, and its sensing end abuts against the frame of the positioning mechanism reference surface.

[0008] A more specific embodiment of the above technical solution is that the electric cylinder is fixed to the upper base plate by an electric cylinder fixing bracket.

[0009] Furthermore, there are three of each of the upper and lower sensors, and the upper and lower sensors have the same structure and performance.

[0010] Further: The electric cylinder is a servo electric cylinder, model DPM-011H1-10F.

[0011] The measurement method for measuring the outer ring of a tapered bearing using the aforementioned tapered bearing outer ring measuring device includes the following steps:

[0012] 1) When the transmission assembly is in place, the measuring component slide descends, and the two positioning pins on the positioning mechanism reference plate are inserted into the housing positioning holes of the transmission assembly, and the measuring reference block contacts the end face of the housing; ensuring the consistency of sensor measurement positions;

[0013] 2) Activate the clamping mechanism, and the electric cylinder applies a preload force to clamp the outer ring of the bearing, eliminating the gap between the inner and outer rings of the tapered bearing; ensuring that the tapered bearing is pressed into the bottom end and that the end face of the tapered bearing is perpendicular to the axis of the intermediate shaft;

[0014] 3) Activate the measuring mechanism. Three lower sensors are fixed on the frame of the positioning reference plane to measure the values ​​on the end face of the housing. Three upper sensors act on the end face of the outer ring of the bearing to measure the depth of the tapered bearing end face and calculate the distance between the tapered bearing end face and the end face of the housing. When the three lower sensors of the measuring mechanism are fixed on the frame of the positioning reference plane and the three upper sensors act on the end face of the outer ring of the bearing, rotate the intermediate shaft. The upper and lower sensors dynamically collect data from the bearing end face. After averaging and sorting, the middle 60% of the sorted data is used to calculate the average value. In terms of software, a secondary measurement is added. The difference between the two measurements is controlled within the set range. The difference between the data before and after is compared. If the data is accurate, the measurement is considered qualified; otherwise, the equipment alarms and is considered unqualified.

[0015] Due to the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] 1. The present invention is positioned based on the end face of the housing, and a pair of round pins and diamond pins are added and inserted into the positioning holes of the housing to ensure the consistency of the measurement positions of the sensors.

[0017] 2. Three sensors of the present invention are fixed on the frame of the positioning reference surface. The three sensors act on the end face of the outer ring of the bearing. The pressing of the tapered bearing outer ring is performed by a separate mechanism, and the pressing force of the outer ring can be adjusted. By the pressing force, the clearance of the tapered bearing is eliminated to ensure that the tapered bearing is pressed into the bottom end, and the end face of the tapered bearing is perpendicular to the axis of the intermediate shaft. Then, the intermediate shaft is rotated, and the sensors dynamically collect the data of the bearing end face, take the average value, sort it, and then take the average value of the middle 60% of the sorted data. In terms of software, secondary measurement is added, and the difference of the secondary measurement is controlled within the set range to determine that the measurement is qualified, otherwise the device alarms.

[0018] 3. Using the present invention to measure the outer ring of the tapered bearing avoids the influence of factors such as tray differences and tray wear on the accuracy and stability of data caused by differences in the measurement positions of the sensors.

[0019] 4. The pressing mechanism and the measuring mechanism of the present invention are separated, avoiding the transmission error caused by the probe, avoiding the error caused by the swing of the probe, and avoiding the measurement error caused by the wear of the probe under the action of the pressing force.

[0020] 5. The present invention adopts two measurements, avoiding the inaccuracy of measurement caused by process changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the transmission assembly;

[0022] Figure 2 is a schematic diagram of the measurement reference, the intermediate shaft, the tapered bearing and the housing positions;

[0023] Figure 3 is a schematic diagram of measuring the outer ring of the tapered bearing with the existing measuring device;

[0024] Figure 4 is a three-dimensional structural schematic diagram of the outer ring measuring device of the tapered bearing of the present invention;

[0025] Figure 5 is a schematic structural diagram of the positioning mechanism in the measuring device of the present invention;

[0026] Figure 6 is a schematic diagram of the positioning of the positioning mechanism in the measuring device of the present invention;

[0027] Figure 7 is a schematic structural diagram of the pressing mechanism in the measuring device of the present invention;

[0028] Figure 8 This is a cross-sectional schematic diagram of the clamping mechanism in the measuring device of the present invention;

[0029] Figure 9 This is a schematic diagram of the measuring mechanism structure in the measuring device of the present invention;

[0030] Figure 10 This is a cross-sectional schematic diagram of the measuring mechanism in the measuring device of the present invention.

[0031] The labels in the diagram are as follows:

[0032] 1. Gearbox assembly, 1-1. Gearbox intermediate shaft; 1-2. Tapered bearing, 1-2-1. Tapered bearing outer ring; 1-3. Housing; 2. Existing measuring device, 2-1. Existing measuring device probe, 2-2 and 2-3. Sensor; 2-4. Bushing; 3. Positioning mechanism, 3-1. Support column; 3-2. Positioning pin; 3-3. Lower base plate; 3-4. Upper base plate; 4. Clamping mechanism, 4-1. Electric cylinder; 4-2. Clamping head; 4-3. Guide rod; 4-4. New probe; 4-5. Electric cylinder mounting bracket; 5. Measuring mechanism, 5-1. Positioning block; 5-3. Upper sensor; 5-2. Lower sensor; 5-4. Upper sensor mounting bracket; 5-5. Lower sensor mounting bracket. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Figure 3 The existing tapered bearing outer ring measuring device has been described in the background section and will not be repeated here.

[0035] Figures 4 to 10 The outer ring measuring device for tapered bearings includes a positioning mechanism 3, a clamping mechanism 4, and a measuring mechanism 5.

[0036] like Figure 5 and Figure 6 As shown, the positioning mechanism 3 includes a support column 3-1, a positioning pin 3-2, a lower base plate 3-3, and an upper base plate 3-4. The lower base plate 3-3 and the upper base plate 3-4 have through holes in the middle for the components of the clamping mechanism 4 and the measuring mechanism 5 to pass through, and some fixing holes for fixing the components. The lower base plate 3-3 and the upper base plate 3-4 are connected and supported by the support column 3-1. The bottom surface of the lower base plate 3-3 serves as the reference surface of the positioning mechanism. The lower base plate 3-3 is provided with a positioning pin 3-2 corresponding to the positioning hole of the housing. The positioning pin is inserted into the positioning hole of the housing to ensure the consistency of the sensor measurement position.

[0037] like Figure 7 and Figure 8As shown, the clamping mechanism 4 includes an electric cylinder 4-1, a pressure head 4-2, a guide rod 4-3, and a new probe 4-4. The electric cylinder 4-1 is fixed to the upper base plate 3-4 via an electric cylinder mounting bracket 4-5. The pressure head 4-2 is installed at the end of the extension rod of the electric cylinder 4-1. The guide rod 4-3 passes through the upper base plate 3-4 and connects to the new probe 4-4. During measurement, the electric cylinder extends and acts on the guide rod 4-3 through the pressure head 4-2. The guide rod acts on the new probe 4-4 to clamp the outer ring 1-2-1 of the tapered bearing. The electric cylinder 4-1 is a servo electric cylinder, model DPM-011H1-10F.

[0038] like Figure 9 and Figure 10 As shown, the measuring mechanism 5 includes a positioning block 5-1, an upper sensor 5-3, a lower sensor 5-2, an upper sensor mounting bracket 5-4, and a lower sensor mounting bracket 5-5. The positioning block 5-1 is installed on the lower base plate 3-3 corresponding to the corresponding part of the housing 1-3. The three upper sensors 5-3 are fixed to the upper base plate 3-4 by the upper sensor mounting bracket 5-4, and their sensing ends act on the end face of the outer ring 1-2-1 of the tapered bearing. The three lower sensors 5-2 are fixed to the lower base plate 3-3 by the lower sensor mounting bracket 5-5, and their sensing ends abut against the frame of the reference surface of the positioning mechanism. The three upper sensors and the three lower sensors have the same structure and performance.

[0039] use Figures 4 to 10 The method for measuring the outer ring of a tapered bearing using a tapered bearing outer ring measuring device, and the measurement steps are as follows:

[0040] 1) When the transmission assembly 1 is in place, the measuring component slide descends, and the two positioning pins 3-2 on the reference plate of the positioning mechanism 3 are inserted into the positioning holes of the housing of the transmission assembly 1. The measuring reference block contacts the end face of the housing, ensuring the consistency of the sensor measurement position.

[0041] 2) Start the clamping mechanism 4, and the electric cylinder 4-1 applies preload to clamp the outer ring 1-2-1 of the bearing, eliminating the gap between the inner and outer rings of the tapered bearing; ensure that the tapered bearing is pressed into the bottom end and that the end face of the tapered bearing is perpendicular to the axis of the intermediate shaft;

[0042] 3) Activate the measuring mechanism 5. Three lower sensors 5-2 are fixed on the frame of the positioning reference surface to measure the values ​​on the end face of the housing. Three upper sensors 5-3 act on the end face of the outer ring of the bearing to measure the depth of the tapered bearing end face and calculate the distance between the tapered bearing end face and the end face of the housing. When the three lower sensors of the measuring mechanism 5 are fixed on the frame of the positioning reference surface and the three upper sensors act on the end face of the outer ring of the bearing, rotate the intermediate shaft. The sensors dynamically collect data from the bearing end face, take the average value, sort it, and then take the middle 60% of the sorted data to calculate the average value again. In terms of software, a secondary measurement is added. The difference between the two measurements is controlled within the set range. Compare the differences between the before and after measurements. If the data is accurate, the measurement is considered qualified; otherwise, the equipment alarms and is considered unqualified.

Claims

1. A tapered bearing outer race measuring device characterized by: It includes a positioning mechanism (3), a clamping mechanism (4), and a measuring mechanism (5); The positioning mechanism (3) includes a support column (3-1), a positioning pin (3-2), a lower base plate (3-3), and an upper base plate (3-4); the lower base plate (3-3) and the upper base plate (3-4) are provided with through holes and fixed mounting holes in the middle; the lower base plate (3-3) and the upper base plate (3-4) are connected and supported by the support column (3-1); the bottom surface of the lower base plate (3-3) serves as the reference surface of the positioning mechanism, and the positioning pin (3-2) is provided on the lower base plate (3-3) corresponding to the positioning hole of the housing. The clamping mechanism (4) includes an electric cylinder (4-1), a pressure head (4-2), a guide rod (4-3), and a new probe (4-4); the pressure head (4-2) is installed at the end of the extension rod of the electric cylinder (4-1); the guide rod (4-3) passes through the upper base plate (3-4) and is connected to the new probe (4-4); The measuring mechanism (5) includes a positioning block (5-1), an upper sensor (5-3), a lower sensor (5-2), an upper sensor mounting bracket (5-4), and a lower sensor mounting bracket (5-5). The positioning block (5-1) is installed on the lower base plate (3-3) corresponding to the corresponding part of the housing (1-3). The upper sensor (5-3) is fixed on the upper base plate (3-4) by the upper sensor mounting bracket (5-4), and its sensing end acts on the end face of the outer ring (1-2-1) of the tapered bearing. The lower sensor (5-2) is fixed on the lower base plate (3-3) by the lower sensor mounting bracket (5-5), and its sensing end abuts against the frame of the positioning mechanism reference surface.

2. The tapered bearing outer ring measuring device according to claim 1, characterized in that: The electric cylinder (4-1) is fixed on the upper base plate (3-4) by the electric cylinder fixing bracket (4-5).

3. The tapered bearing outer ring measuring device according to claim 1 or 2, characterized in that: There are three of each of the upper sensor (5-3) and the lower sensor (5-2), and the upper sensor (5-3) and the lower sensor (5-2) have the same structure and performance.

4. The tapered bearing outer ring measuring device according to claim 3, characterized in that: The electric cylinder (4-1) is a servo electric cylinder, model DPM-011H1-10F.

5. A method for measuring the outer ring of a tapered bearing using the tapered bearing outer ring measuring device according to any one of claims 1 to 4, characterized in that, It includes the following steps: 1) When the transmission assembly (1) is in place, the measuring component slide descends, and the two positioning pins (3-2) on the reference plate of the positioning mechanism (3) are inserted into the housing positioning holes of the transmission assembly (1), and the measuring reference block contacts the end face of the housing; to ensure the consistency of the sensor measurement position; 2) Start the clamping mechanism (4), and the electric cylinder (4-1) applies a preload to clamp the outer ring of the bearing (1-2-1) to eliminate the gap between the inner and outer rings of the tapered bearing; ensure that the tapered bearing is pressed into the bottom end and the end face of the tapered bearing is perpendicular to the axis of the intermediate shaft; 3) Start the measuring mechanism (5). The three lower sensors (5-2) are fixed on the frame of the positioning reference surface to measure the value of the end face of the housing. The three upper sensors (5-3) act on the end face of the outer ring of the bearing to measure the depth value of the end face of the tapered bearing and calculate the distance between the end face of the tapered bearing and the end face of the housing. When the three lower sensors of the measuring mechanism (5) are fixed on the frame of the positioning reference surface and the three upper sensors act on the end face of the outer ring of the bearing, rotate the intermediate shaft. The upper and lower sensors dynamically collect the data of the bearing end face. After taking the average value and sorting it, take the middle 60% of the sorted data to calculate the average value. In terms of software, add a second measurement. The difference between the two measurements is controlled within the set range. If the measurement is qualified, it is judged as unqualified. Otherwise, it is judged as unqualified.

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