CN207180615U - Non-contact type bearing lasso inner diameter measuring device - Google Patents

Abstract

The utility model relates to a non-contact measuring device for the inner diameter of a bearing ring, which comprises a sensor mounting frame, and the transmission mounting frame is provided with two laser displacement sensors distributed along the radial interval of the bearing ring, and the two laser displacement sensors respectively have When the laser displacement sensor is inserted into the bearing ring, the measuring head faces outward toward the inner surface of the bearing ring. The measuring device also includes a rotating drive mechanism for realizing the relative rotation of the bearing ring to be measured and the two laser displacement sensors. The non-contact laser displacement sensor is used for measurement, which can effectively avoid scratching the measured parts and ensure the surface integrity of the parts. The relative rotation between the bearing ring and the two laser displacement sensors is realized by using the rotating drive mechanism, so that the inner diameter size and inner diameter size variation of the bearing ring at different angular positions can be measured, thereby effectively improving the measurement accuracy.

Description

Non-contact Bearing Ring Inner Diameter Measuring Device

technical field

The utility model relates to a non-contact measuring device for the inner diameter of a bearing ring.

Background technique

Bearing is a kind of high-precision mechanical parts. Its size and geometry are the main factors of bearing accuracy level. Measurement is a necessary means to judge size and geometry. At present, in the bearing processing process and its finished product measurement, most of the bearing special instruments are used to realize the measurement. Bearing-specific instruments have the advantages of simple operation, easy learning, low price, durability, and high measurement efficiency, but they also have certain limitations:

(1) The cemented carbide probe used in the bearing special instrument is easy to scratch the surface of the bearing parts during the measurement process. Ordinary bearings are acceptable, but any tiny flaws in high-precision bearings will affect product quality, which is absolutely not allowed of.

(2) For some thin-walled bearings, manual measurement is performed on a special instrument, and the external force of the hand has a great influence on the measurement results, which is far from meeting the requirements of the bearing accuracy for measurement.

(3) The display value error of the special instrument is relatively large, which cannot meet the measurement requirements of some precision bearings.

(4) There are many deficiencies in the use of other high-precision measuring instruments: ① contact measurement is mostly a two-point measurement method for determining the diameter, and only one diameter can be measured at a time, which cannot meet the requirements of the bearing inspection standard for parameters such as average diameter and diameter variation , and the time is long and the efficiency is low. ②Contact measurement has force measurement, which also affects thin-walled bearing parts. ③Contact measurement will cause different degrees of scratches on the surface of the part. ④The measurement accuracy of non-contact measurement is low. Limited by the measurement principle, the measurement cannot be completed for individual requirements.

In the Chinese invention patent whose authorized announcement number is CN101733680B, a non-contact online measurement method of a large bearing raceway is disclosed. A laser displacement sensor installed on a CNC machine tool is used to realize the non-contact measurement of the bearing raceway, but The measurement device used in this measurement method is only equipped with a single laser displacement sensor, which can neither measure the radius of the inner and outer diameter of the bearing ring, nor the diameter of the inner and outer diameter of the bearing ring, and still cannot solve the problem of high precision. The problem of accurate measurement of the inner and outer diameters of bearing rings.

Utility model content

The purpose of the utility model is to provide a non-contact bearing ring inner diameter measuring device with simple structure and high measuring precision.

In order to achieve the above purpose, the technical solution of the non-contact bearing ring inner diameter measuring device provided by the utility model is: a non-contact bearing ring inner diameter measuring device, including a sensor mounting frame, and the transmission mounting frame is equipped with a Two laser displacement sensors distributed at intervals in the radial direction of the bearing ring. The two laser displacement sensors respectively have measuring heads for facing outward toward the inner surface of the bearing ring when the laser displacement sensor is inserted into the bearing ring. The measuring device also includes a measuring head for realizing The bearing ring to be tested is a rotary drive mechanism that rotates relative to the two laser displacement sensors.

The spacing distribution direction of the two laser displacement sensors is defined as the left-right direction, and the two laser displacement sensors are assembled on the sensor installation frame with an adjustable spacing along the left-right direction.

The two laser displacement sensors are respectively installed on the sensor installation frame through the mobile frame, and the sensor mounting frame is provided with an adjustment screw rod extending along the left and right direction for adjusting the two laser displacement sensors to move toward and opposite each other. There is a threaded hole matched with the adjusting screw rod, and the adjusting screw rod has two threaded sections corresponding to the threaded holes on the two moving frames. The two threaded sections rotate in opposite directions. A guide that moves in the left-right direction.

The rotation driving mechanism is used to drive the bearing ring to be tested to rotate so as to realize the relative rotation of the bearing ring to be tested and the two laser displacement sensors. The rotation driving mechanism includes a turntable for carrying the bearing ring to be tested, and the turntable is driven by a motor to rotate.

The measuring device also includes an angular displacement encoder for controlling the rotation of the turntable at a set angle, and the angular displacement encoder is connected to the motor control.

The measuring device also includes an axial adjustment mechanism that drives the sensor installation frame to move axially along the bearing ring with the two laser displacement sensors, and an axial detector for detecting the axial displacement of the two laser displacement sensors along the bearing ring.

The measuring device also includes a radial adjustment mechanism for driving the sensor mounting frame to move along a plane perpendicular to the axial direction of the bearing ring with the two laser displacement sensors, and for detecting the displacement of the two laser displacement sensors driven by the radial adjustment mechanism radial detector.

The measuring device includes a data receiving and processing module for connecting with the signal output terminals of the two laser displacement sensors.

The two laser displacement sensors are rotatably assembled on the sensor installation frame, and the two laser displacement sensors have a first measuring position where the two measuring heads are arranged opposite to each other and a second measuring position where the two measuring heads are arranged facing each other.

The beneficial effects of the utility model are: in the non-contact bearing ring inner diameter measuring device provided by the utility model, two laser displacement sensors are used to measure the inner diameter of the bearing ring, and the non-contact The laser displacement sensor is used to measure, which can effectively avoid scratching the measured parts and ensure the surface integrity of the parts. The relative rotation between the bearing ring and the two laser displacement sensors is realized by using the rotating drive mechanism, so that the inner diameter size and inner diameter size variation of the bearing ring at different angular positions can be measured, thereby effectively improving the measurement accuracy.

Further, the distance between the two laser displacement sensors can be adjusted along the left and right directions, so that the distance between the laser displacement sensors can be adjusted to adapt to bearing rings of different sizes.

Further, the spacing of the laser displacement sensor for adjusting the adjustment amount of the screw rod is selected, and the adjustment is convenient and reliable.

Further, the rotation driving mechanism includes a turntable for carrying the bearing ring to be tested, so as to facilitate the relative rotation between the bearing ring and the two laser displacement sensors.

Further, the measuring device also includes an angular displacement encoder, which can control the rotation of the turntable with the bearing ring at a set angle according to the interval as required, so as to improve the efficiency of rotation measurement.

Further, the measuring device includes an axial adjustment mechanism, so that the corresponding radial dimensions of the cross-sections at different axial positions of the bearing ring can be measured.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of a non-contact bearing ring inner diameter measuring device provided by the present invention;

Fig. 2 is a structural schematic diagram of the sensor mounting frame in Fig. 1;

Fig. 3 is a schematic diagram of measuring the inner diameter of a bearing ring by using the measuring device shown in Fig. 1 .

Detailed ways

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

The specific embodiment of the non-contact bearing ring inner diameter measuring device provided by the utility model, as shown in Figure 1 to Figure 3, the measuring device in this embodiment includes a base 20, on which a sliding table adjustment mechanism is installed The sensor mounting frame 8 is provided with two laser displacement sensors radially spaced along the bearing ring on the sensor mounting frame 8. In this embodiment, the spacing distribution direction of the two laser displacement sensors is defined as the left and right direction. The two laser displacement sensors include The first sensor 6 and the second sensor 7 are distributed at intervals on the left and right, and the two laser displacement sensors respectively have measuring heads for facing outward toward the inner surface of the bearing ring when the laser displacement sensor is inserted into the bearing ring.

In this embodiment, the axial direction of the bearing ring is the vertical direction up and down, and each laser displacement sensor is installed on the sensor mounting frame movably along the left and right directions through the moving frame respectively, and the two moving frames are the first corresponding to the first sensor 6. The moving frame 26 and the second moving frame 25 corresponding to the second sensor 7 are provided with an adjusting screw rod 23 extending along the left-right direction on the sensor mounting frame 8 for adjusting the two laser displacement sensors to move toward each other and move away from each other. Threaded holes are respectively set on the adjusting screw rods, and the adjusting screw rods 23 have two threaded segments corresponding to the screwed holes on the two moving frames, and the two threaded segments have opposite directions of rotation. Moreover, the sensor installation frame 8 is also provided with a guide piece 24 that guides the two moving frames to move in the left and right direction, and the guide piece 24 is specifically a guide rod that guides and cooperates with the two moving frames.

For the convenience of operation, one end of the adjustment screw rod 23 is extended out of the sensor mounting frame in the axial direction, and a handle 27 is provided at the extended end of the adjustment screw rod, so that the measuring personnel can rotate the adjustment screw rod 23 and then control the two laser displacement sensors to face or face each other. Move to adjust.

The measuring device also includes a rotating drive mechanism for realizing the relative rotation of the bearing ring to be tested and the two laser displacement sensors. In this embodiment, in order to facilitate the measurement of the inner diameter of the bearing ring, the rotating drive mechanism specifically includes a bearing ring for carrying the bearing sleeve to be tested. The turntable 4 of the ring 5, the turntable 4 is driven to rotate by the motor 21 through the first coupling 3, and the corresponding angular displacement encoder 22 connected with the motor 21 is configured, and the angular displacement encoder controls the motor as a rotation angle controller 21. Drive the bearing ring to be tested to rotate at intervals of a set angle, that is, to stop at a set angle for measurement, and then to stop at a set angle for measurement.

In this embodiment, the sliding table adjustment mechanism includes a vertical guide rail 9 provided on the base 20 with a guiding direction extending along the vertical direction. In parallel, the vertical guide rail 9 is provided with an axial adjustment mechanism, which is used to drive the sensor mounting frame 8 to move axially along the bearing ring with two laser displacement sensors. The axial adjustment mechanism specifically includes a vertical screw 12, the vertical The screw 12 is driven and rotated by the vertical motor 11 through the second coupling 10, and the vertical screw 12 is correspondingly equipped with a diameter for driving the sensor mounting frame to move with two laser displacement sensors in a plane perpendicular to the axial direction of the bearing ring. The radial adjustment mechanism includes a horizontal guide rail 18 assembled on the vertical guide rail 9 along the up and down direction, the horizontal guide rail 18 is driven by the vertical screw 12, and the vertical screw 12 rotates to drive the horizontal guide rail to move and adjust in the up and down direction . A horizontal sliding table 17 is installed on the horizontal guide rail 12 for guiding movement, and the sensor mounting frame 8 is fixedly installed on the horizontal sliding table 17. The horizontal sliding table 17 is driven by a horizontal lead screw 14 to move and adjust along the horizontal guide rail 18. The motor 16 is driven to rotate through the third coupling 15 .

In this embodiment, the above-mentioned radial adjustment mechanism is mainly used to move the two laser displacement sensors horizontally above the bearing ring to be tested, so as to facilitate the two laser displacement sensors to extend into the bearing ring. Then, use the available axial adjustment mechanism to drive the sensor mounting frame to move and adjust the two laser displacement sensors in the vertical direction, send the two laser displacement sensors into the bearing ring, and measure the bearing ring at different cross-sectional positions inner diameter size.

In fact, corresponding to the axial adjustment mechanism, an axial detector for detecting the axial displacement of the two laser displacement sensors along the bearing ring is configured. The vertical grating scale 13 that the horizontal guide rail moves axially along the bearing ring, since the two laser displacement sensors and the sensor installation frame move along the up and down direction following the horizontal slide table 17 and the horizontal guide rail 18, can realize alignment by detecting the up and down vertical displacement of the horizontal guide rail. The vertical displacement detection of two laser displacement sensors.

Moreover, corresponding to the radial adjustment mechanism, a radial detector for detecting the displacement of the two laser displacement sensors driven by the radial adjustment mechanism is configured, and the radial detector is specifically a horizontal grating ruler 19 arranged on the side of the horizontal guide rail, The horizontal grating ruler 19 can realize the corresponding displacement of the two laser displacement sensors by detecting the horizontal displacement of the horizontal slide table 17 .

In addition, in this embodiment, the measurement device also includes a data receiving and processing module for connecting to the signal output terminals of the two laser displacement sensors, and the data receiving and processing module specifically includes a computer 1 and a measurement and control system 2 .

When using the measuring device provided in this embodiment to measure the inner diameter of the bearing ring, take a bearing ring with a nominal inner diameter of 50mm as an example to illustrate the measurement implementation steps of the measuring device:

(1) Put the standard part with a length of 50mm on the turntable 4, drive the vertical screw 12 to rotate through the vertical motor 11 to make the horizontal guide rail 18 move vertically; drive the horizontal screw 14 to rotate through the horizontal motor 16 to make the horizontal sliding table 17 move horizontally , so as to drive the sensor installation frame 8 to move to the top of the standard part as a whole. Then, turn the handle 27 to rotate the adjustment screw 23 to adjust the horizontal distance between the two mobile frames, and simultaneously use a 50mm long standard part to calibrate the horizontal measurement distance between the two laser displacement sensors to 50mm. Subsequently, fix the two moving frames to keep the horizontal measuring distance between the two laser displacement sensors at 50 mm, and remove the standard parts.

(2) Put the tested bearing ring 5 on the turntable 4, adjust the upper and lower positions of the sensor mounting frame 8, so that the two laser displacement sensors extend into the tested bearing ring, as shown in Figure 3, and the A and B are expressed as laser beams, and then the inner diameter of the bearing ring is measured by the comparative measurement method.

The introduction of the comparative measurement method takes a bearing ring with a nominal inner diameter of 50mm as an example: first calibrate the distance between the two laser displacement sensors as 50mm in the standard part with a length of 50mm in step (1), and then lock the distance between the two laser displacement sensors. The position remains unchanged; then use two laser displacement sensors to measure the distance from the sensor to the inner surface of the bearing ring, for example, one value is 0.235 and the other is 0.112, then the inner diameter of the bearing ring to be tested is 50+0.235+0.112 =50.347mm.

(3) Adjust the rotation angle of the turntable 4 through the angular displacement encoder 22 and the motor 21, so that the measured bearing ring 5 rotates at a set angle, and the two laser displacement sensors measure the rotation according to the comparison measurement method in the above step (2). The inner ring size of the bearing ring after the corresponding angle. Continue to adjust the setting angle of the turntable 4, and measure the inner diameter of the bearing ring at different angular positions and the variation of the inner diameter.

(4) The vertical screw 12 is driven by the vertical motor 11 to move the sensor mounting frame 8 vertically, and the vertical movement of the sensor mounting frame 8 is used to drive two laser displacement sensors to scan the inner surface of the bearing ring to realize the bearing ring Measurement of inner diameter dimensions at different cross-sections of the inner surface.

(5) The measurement data of (3) and (4) are transmitted to the computer 1 through the measurement and control system 2, and the computer 1 calculates and compares the inner surface of the bearing ring at different angles and cross-sections and the inner diameter size variation. Get the maximum diameter and ellipse dimension of the inner diameter of the bearing ring. Thus, the measurement of parameters such as inner diameter size, size variation, and ellipse is completed.

In the measuring device provided in this embodiment, two laser displacement sensors are used to measure the inner diameter of the bearing ring, and a non-contact laser displacement sensor is used for measurement, which can effectively avoid scratching the measured part and ensure the surface integrity of the part . Moreover, the turntable is used to drive the bearing ring to rotate at intervals to set the angle, so that the inner diameter and the variation of the inner diameter of the bearing ring at different angular positions can be measured. In addition, the axial adjustment mechanism can not only drive the two laser displacement sensors to extend Inserted into the bearing ring, the upper and lower positions of the two laser displacement sensors can also be adjusted, so as to realize the measurement of radial dimensions at different sections.

During the measurement, two laser displacement sensors pass through the center of the bearing ring as a standard part and through the center of the bearing ring to be tested.

In this embodiment, a turntable is used to realize the relative rotation between the tested bearing ring and the two laser displacement sensors, which can avoid the deformation caused by the manual rotation operation and can effectively improve the measurement accuracy, especially suitable for the measurement of thin-walled bearing rings. In other embodiments, the bearing ring to be tested can also be kept still, and the sensor mounting frame can be installed on a turntable as a whole, and the rotation of the turntable can be used to drive the two laser displacement sensors to rotate around the central axis of the bearing ring. The specific rotation drive mechanism can be designed and arranged according to the actual situation.

In this embodiment, an angular displacement encoder is used as a rotation angle controller to control the rotation angle of the tested bearing ring. In other embodiments, if the turntable is manually driven to rotate, the angle disc can also be used to control the rotation angle of the turntable.

In this embodiment, the axial adjustment mechanism specifically adopts a vertical lead screw, which is convenient to use a motor to drive and adjust. In other embodiments, a piston cylinder or an electric push rod driven by a servo motor can also be used to realize the vertical movement adjustment of the sensor installation frame and the two laser displacement sensors. Correspondingly, for the radial adjustment mechanism, a piston cylinder or an electric push rod driven by a servo motor can also be used to realize the movement adjustment of the sensor mounting frame and the two laser displacement sensors in the horizontal plane.

In this embodiment, the adjustment screw rod is used to drive the two laser displacement sensors to move synchronously towards or against each other through the two moving frames. In other embodiments, corresponding piston cylinders or electric push rods driven by servo motors can also be configured to control the relative or opposite movement of the two laser displacement sensors.

In this embodiment, the axial adjustment mechanism is used to realize the movement and adjustment of the two sensor mounting frames and the two laser displacement sensors in the axial direction of the bearing ring, so that the measurement of the inner diameter of different sections can be realized. In other embodiments, when it is not necessary to measure the inner diameters at cross-sections at different depths, an axial adjustment mechanism may not be provided, and the sensor mounting bracket may be manually placed into the bearing ring.

In this embodiment, the two laser displacement sensors are fixed on the mobile frame. At this time, the two sides of the two laser displacement sensors are arranged opposite to each other, so that when the two laser displacement sensors are inserted into the bearing ring, the two sides of the sensors will be outwards. Facing the inner surface of the bearing ring, to ensure the normal measurement of the inner diameter of the bearing ring.

In other embodiments, the two laser displacement sensors can also be rotatably assembled on the sensor mounting frame, and the two laser displacement sensors have a first measurement position where the two probes are arranged opposite to each other and a second measurement position where the two probes are arranged opposite to each other. , so that when the two laser displacement sensors are at the first measurement position, the inner diameter of the bearing ring can be measured as shown in this embodiment, and when the two laser displacement sensors are at the second measurement position, the adjustment can be used The distance between the two laser displacement sensors is adjusted by the screw screw so that the two laser displacement sensors are arranged on the outside of the bearing ring. , the device can be used to measure the outer diameter of the bearing ring.

Claims (7)

1. A kind of 1. non-contact type bearing lasso inner diameter measuring device, it is characterised in that：Including sensor mount, driver installation Frame is provided with two laser displacement sensors being distributed along bearing ring spaced radial, by the two laser displacement sensor sides of being spaced apart To being defined as left and right directions, spacing is adjustable in left-right direction is assemblied in the sensor installation for two laser displacement sensor On frame, two laser displacement sensors are vertically extending, and two laser displacement sensors have respectively to be used to pass in laser displacement The gauge head of bearing ring inner surface is outwardly directed to when in sensor insertion bearing ring, measurement apparatus also includes being used to realize axle to be measured The rotating drive mechanism that bearing ring and two laser displacement sensors relatively rotate, the rotatable dress of two laser displacement sensor Fit on the sensor mount, the first measurement position and two that there are two laser displacement sensors two gauge heads to arrange opposite to each other is surveyed The second measurement position that head is arranged in opposite directions.
2. 2. non-contact type bearing lasso inner diameter measuring device according to claim 1, it is characterised in that：The two laser position Displacement sensor respectively by movable stand be arranged on sensor mount on, sensor mount be provided with extend in left-right direction with For adjusting the adjustment screw mandrel that two laser displacement sensors are opposite, are moved away from, it is respectively equipped with two movable stands and adjustment screw mandrel The screwed hole of cooperation, adjustment screw mandrel have two thread segments with the screwed hole corresponding matching on two movable stands, two thread segment rotation directions On the contrary, the guide that two movable stands of guiding move in left-right direction is additionally provided with the sensor mount.
3. 3. non-contact type bearing lasso inner diameter measuring device according to claim 1 or 2, it is characterised in that：The rotation Drive mechanism is used to drive bearing ring to be measured to rotate to realize that bearing ring to be measured and two laser displacement sensors relatively rotate, Rotating drive mechanism includes being used for the turntable for carrying bearing ring to be measured, and turntable is by motor-driven rotation.
4. 4. non-contact type bearing lasso inner diameter measuring device according to claim 3, it is characterised in that：Measurement apparatus is also wrapped The displacement coder for controlling turntable interval set angle to rotate is included, displacement coder connects with the motor control Connect.
5. 5. non-contact type bearing lasso inner diameter measuring device according to claim 1 or 2, it is characterised in that：Measurement apparatus Also include the mechanism for axial adjusting that driving sensor mount moves axially with two laser displacement sensors along bearing ring, with And for detecting axial detector of two laser displacement sensors along bearing ring axial movement displacement.
6. 6. non-contact type bearing lasso inner diameter measuring device according to claim 1 or 2, it is characterised in that：Measurement apparatus Also include being used to drive sensor mount with two laser displacement sensors along the planar movement perpendicular to bearing ring axial direction Radial direction adjustment mechanism, and for detect two laser displacement sensors radial direction adjustment mechanism driving under displacement radial direction inspection Survey device.
7. 7. non-contact type bearing lasso inner diameter measuring device according to claim 1 or 2, it is characterised in that：Measurement apparatus Including the data receiver and processing module for being connected with the signal output part of two laser displacement sensors.